config KPROBES
bool "Kprobes (EXPERIMENTAL)"
+ depends on PPC64
help
Kprobes allows you to trap at almost any kernel address and
execute a callback function. register_kprobe() establishes
obj-y += process.o init_task.o time.o \
prom.o traps.o setup-common.o
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o misc_32.o systbl.o
-obj-$(CONFIG_PPC64) += misc_64.o
+obj-$(CONFIG_PPC64) += misc_64.o dma_64.o iommu.o
obj-$(CONFIG_PPC_OF) += prom_init.o
obj-$(CONFIG_MODULES) += ppc_ksyms.o
obj-$(CONFIG_BOOTX_TEXT) += btext.o
obj-$(CONFIG_6xx) += idle_6xx.o
obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_KPROBES) += kprobes.o
+
+module-$(CONFIG_PPC64) += module_64.o
+obj-$(CONFIG_MODULES) += $(module-y)
+
+pci64-$(CONFIG_PPC64) += pci_64.o pci_dn.o pci_iommu.o \
+ pci_direct_iommu.o iomap.o
+obj-$(CONFIG_PCI) += $(pci64-y)
+
+kexec64-$(CONFIG_PPC64) += machine_kexec_64.o
+obj-$(CONFIG_KEXEC) += $(kexec64-y)
ifeq ($(CONFIG_PPC_ISERIES),y)
$(obj)/head_64.o: $(obj)/lparmap.s
endif
else
-# stuff used from here for ARCH=ppc or ARCH=ppc64
+# stuff used from here for ARCH=ppc
smpobj-$(CONFIG_SMP) += smp.o
-obj-$(CONFIG_PPC64) += traps.o process.o init_task.o time.o \
- setup-common.o $(smpobj-y)
-
endif
obj-$(CONFIG_IBMVIO) += vio.o
obj-$(CONFIG_XICS) += xics.o
obj-$(CONFIG_SCANLOG) += scanlog.o
-obj-$(CONFIG_EEH) += eeh.o eeh_event.o
+obj-$(CONFIG_EEH) += eeh.o eeh_event.o
+
+obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o
+obj-$(CONFIG_HVCS) += hvcserver.o
+++ /dev/null
-#
-# For a description of the syntax of this configuration file,
-# see Documentation/kbuild/kconfig-language.txt.
-#
-
-config 64BIT
- def_bool y
-
-config MMU
- bool
- default y
-
-config PPC_STD_MMU
- def_bool y
-
-config UID16
- bool
-
-config RWSEM_GENERIC_SPINLOCK
- bool
-
-config RWSEM_XCHGADD_ALGORITHM
- bool
- default y
-
-config GENERIC_CALIBRATE_DELAY
- bool
- default y
-
-config GENERIC_ISA_DMA
- bool
- default y
-
-config EARLY_PRINTK
- bool
- default y
-
-config COMPAT
- bool
- default y
-
-config SCHED_NO_NO_OMIT_FRAME_POINTER
- bool
- default y
-
-config ARCH_MAY_HAVE_PC_FDC
- bool
- default y
-
-config PPC_STD_MMU
- bool
- default y
-
-# We optimistically allocate largepages from the VM, so make the limit
-# large enough (16MB). This badly named config option is actually
-# max order + 1
-config FORCE_MAX_ZONEORDER
- int
- default "9" if PPC_64K_PAGES
- default "13"
-
-source "init/Kconfig"
-
-config SYSVIPC_COMPAT
- bool
- depends on COMPAT && SYSVIPC
- default y
-
-menu "Platform support"
-
-choice
- prompt "Platform Type"
- default PPC_MULTIPLATFORM
-
-config PPC_ISERIES
- bool "IBM Legacy iSeries"
-
-config PPC_MULTIPLATFORM
- bool "Generic"
-
-endchoice
-
-config PPC_PSERIES
- depends on PPC_MULTIPLATFORM
- bool " IBM pSeries & new iSeries"
- default y
-
-config PPC_BPA
- bool " Broadband Processor Architecture"
- depends on PPC_MULTIPLATFORM
-
-config PPC_PMAC
- depends on PPC_MULTIPLATFORM
- bool " Apple G5 based machines"
- default y
- select U3_DART
- select GENERIC_TBSYNC
-
-config PPC_MAPLE
- depends on PPC_MULTIPLATFORM
- bool " Maple 970FX Evaluation Board"
- select U3_DART
- select MPIC_BROKEN_U3
- select GENERIC_TBSYNC
- default n
- help
- This option enables support for the Maple 970FX Evaluation Board.
- For more informations, refer to <http://www.970eval.com>
-
-config PPC
- bool
- default y
-
-config PPC64
- bool
- default y
-
-config PPC_OF
- depends on PPC_MULTIPLATFORM
- bool
- default y
-
-config XICS
- depends on PPC_PSERIES
- bool
- default y
-
-config MPIC
- depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
- bool
- default y
-
-config PPC_I8259
- depends on PPC_PSERIES
- bool
- default y
-
-config BPA_IIC
- depends on PPC_BPA
- bool
- default y
-
-# VMX is pSeries only for now until somebody writes the iSeries
-# exception vectors for it
-config ALTIVEC
- bool "Support for VMX (Altivec) vector unit"
- depends on PPC_MULTIPLATFORM
- default y
-
-config PPC_SPLPAR
- depends on PPC_PSERIES
- bool "Support for shared-processor logical partitions"
- default n
- help
- Enabling this option will make the kernel run more efficiently
- on logically-partitioned pSeries systems which use shared
- processors, that is, which share physical processors between
- two or more partitions.
-
-config KEXEC
- bool "kexec system call (EXPERIMENTAL)"
- depends on PPC_MULTIPLATFORM && EXPERIMENTAL
- help
- kexec is a system call that implements the ability to shutdown your
- current kernel, and to start another kernel. It is like a reboot
- but it is indepedent of the system firmware. And like a reboot
- you can start any kernel with it, not just Linux.
-
- The name comes from the similiarity to the exec system call.
-
- It is an ongoing process to be certain the hardware in a machine
- is properly shutdown, so do not be surprised if this code does not
- initially work for you. It may help to enable device hotplugging
- support. As of this writing the exact hardware interface is
- strongly in flux, so no good recommendation can be made.
-
-source "drivers/cpufreq/Kconfig"
-
-config CPU_FREQ_PMAC64
- bool "Support for some Apple G5s"
- depends on CPU_FREQ && PMAC_SMU && PPC64
- select CPU_FREQ_TABLE
- help
- This adds support for frequency switching on Apple iMac G5,
- and some of the more recent desktop G5 machines as well.
-
-config IBMVIO
- depends on PPC_PSERIES || PPC_ISERIES
- bool
- default y
-
-config U3_DART
- bool
- depends on PPC_MULTIPLATFORM
- default n
-
-config MPIC_BROKEN_U3
- bool
- depends on PPC_MAPLE
- default y
-
-config GENERIC_TBSYNC
- def_bool n
-
-config PPC_PMAC64
- bool
- depends on PPC_PMAC
- default y
-
-config BOOTX_TEXT
- bool "Support for early boot text console"
- depends PPC_OF
- help
- Say Y here to see progress messages from the boot firmware in text
- mode. Requires an Open Firmware compatible video card.
-
-config POWER4
- def_bool y
-
-config PPC_FPU
- def_bool y
-
-config POWER4_ONLY
- bool "Optimize for POWER4"
- default n
- ---help---
- Cause the compiler to optimize for POWER4 processors. The resulting
- binary will not work on POWER3 or RS64 processors when compiled with
- binutils 2.15 or later.
-
-config IOMMU_VMERGE
- bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
- depends on EXPERIMENTAL
- default n
- help
- Cause IO segments sent to a device for DMA to be merged virtually
- by the IOMMU when they happen to have been allocated contiguously.
- This doesn't add pressure to the IOMMU allocator. However, some
- drivers don't support getting large merged segments coming back
- from *_map_sg(). Say Y if you know the drivers you are using are
- properly handling this case.
-
-config SMP
- bool "Symmetric multi-processing support"
- ---help---
- This enables support for systems with more than one CPU. If you have
- a system with only one CPU, say N. If you have a system with more
- than one CPU, say Y.
-
- If you say N here, the kernel will run on single and multiprocessor
- machines, but will use only one CPU of a multiprocessor machine. If
- you say Y here, the kernel will run on single-processor machines.
- On a single-processor machine, the kernel will run faster if you say
- N here.
-
- If you don't know what to do here, say Y.
-
-config NR_CPUS
- int "Maximum number of CPUs (2-128)"
- range 2 128
- depends on SMP
- default "32"
-
-config HMT
- bool "Hardware multithreading"
- depends on SMP && PPC_PSERIES && BROKEN
- help
- This option enables hardware multithreading on RS64 cpus.
- pSeries systems p620 and p660 have such a cpu type.
-
-config NUMA
- bool "NUMA support"
- default y if SMP && PPC_PSERIES
-
-config ARCH_SELECT_MEMORY_MODEL
- def_bool y
-
-config ARCH_FLATMEM_ENABLE
- def_bool y
- depends on !NUMA
-
-config ARCH_SPARSEMEM_ENABLE
- def_bool y
-
-config ARCH_SPARSEMEM_DEFAULT
- def_bool y
- depends on NUMA
-
-source "mm/Kconfig"
-
-config HAVE_ARCH_EARLY_PFN_TO_NID
- def_bool y
- depends on NEED_MULTIPLE_NODES
-
-config ARCH_MEMORY_PROBE
- def_bool y
- depends on MEMORY_HOTPLUG
-
-# Some NUMA nodes have memory ranges that span
-# other nodes. Even though a pfn is valid and
-# between a node's start and end pfns, it may not
-# reside on that node.
-#
-# This is a relatively temporary hack that should
-# be able to go away when sparsemem is fully in
-# place
-config NODES_SPAN_OTHER_NODES
- def_bool y
- depends on NEED_MULTIPLE_NODES
-
-config PPC_64K_PAGES
- bool "64k page size"
- help
- This option changes the kernel logical page size to 64k. On machines
- without processor support for 64k pages, the kernel will simulate
- them by loading each individual 4k page on demand transparently,
- while on hardware with such support, it will be used to map
- normal application pages.
-
-config SCHED_SMT
- bool "SMT (Hyperthreading) scheduler support"
- depends on SMP
- default off
- help
- SMT scheduler support improves the CPU scheduler's decision making
- when dealing with POWER5 cpus at a cost of slightly increased
- overhead in some places. If unsure say N here.
-
-source "kernel/Kconfig.preempt"
-source kernel/Kconfig.hz
-
-config EEH
- bool "PCI Extended Error Handling (EEH)" if EMBEDDED
- depends on PPC_PSERIES
- default y if !EMBEDDED
-
-#
-# Use the generic interrupt handling code in kernel/irq/:
-#
-config GENERIC_HARDIRQS
- bool
- default y
-
-config PPC_RTAS
- bool
- depends on PPC_PSERIES || PPC_BPA
- default y
-
-config RTAS_ERROR_LOGGING
- bool
- depends on PPC_RTAS
- default y
-
-config RTAS_PROC
- bool "Proc interface to RTAS"
- depends on PPC_RTAS
- default y
-
-config RTAS_FLASH
- tristate "Firmware flash interface"
- depends on RTAS_PROC
-
-config SCANLOG
- tristate "Scanlog dump interface"
- depends on RTAS_PROC && PPC_PSERIES
-
-config LPARCFG
- tristate "LPAR Configuration Data"
- depends on PPC_PSERIES || PPC_ISERIES
- help
- Provide system capacity information via human readable
- <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
-
-config SECCOMP
- bool "Enable seccomp to safely compute untrusted bytecode"
- depends on PROC_FS
- default y
- help
- This kernel feature is useful for number crunching applications
- that may need to compute untrusted bytecode during their
- execution. By using pipes or other transports made available to
- the process as file descriptors supporting the read/write
- syscalls, it's possible to isolate those applications in
- their own address space using seccomp. Once seccomp is
- enabled via /proc/<pid>/seccomp, it cannot be disabled
- and the task is only allowed to execute a few safe syscalls
- defined by each seccomp mode.
-
- If unsure, say Y. Only embedded should say N here.
-
-source "fs/Kconfig.binfmt"
-
-config HOTPLUG_CPU
- bool "Support for hot-pluggable CPUs"
- depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
- select HOTPLUG
- ---help---
- Say Y here to be able to turn CPUs off and on.
-
- Say N if you are unsure.
-
-config PROC_DEVICETREE
- bool "Support for Open Firmware device tree in /proc"
- help
- This option adds a device-tree directory under /proc which contains
- an image of the device tree that the kernel copies from Open
- Firmware. If unsure, say Y here.
-
-config CMDLINE_BOOL
- bool "Default bootloader kernel arguments"
- depends on !PPC_ISERIES
-
-config CMDLINE
- string "Initial kernel command string"
- depends on CMDLINE_BOOL
- default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
- help
- On some platforms, there is currently no way for the boot loader to
- pass arguments to the kernel. For these platforms, you can supply
- some command-line options at build time by entering them here. In
- most cases you will need to specify the root device here.
-
-endmenu
-
-config ISA_DMA_API
- bool
- default y
-
-menu "Bus Options"
-
-config ISA
- bool
- help
- Find out whether you have ISA slots on your motherboard. ISA is the
- name of a bus system, i.e. the way the CPU talks to the other stuff
- inside your box. If you have an Apple machine, say N here; if you
- have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
- you have an embedded board, consult your board documentation.
-
-config SBUS
- bool
-
-config MCA
- bool
-
-config EISA
- bool
-
-config PCI
- bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
- default y
- help
- Find out whether your system includes a PCI bus. PCI is the name of
- a bus system, i.e. the way the CPU talks to the other stuff inside
- your box. If you say Y here, the kernel will include drivers and
- infrastructure code to support PCI bus devices.
-
-config PCI_DOMAINS
- bool
- default PCI
-
-source "drivers/pci/Kconfig"
-
-source "drivers/pcmcia/Kconfig"
-
-source "drivers/pci/hotplug/Kconfig"
-
-endmenu
-
-source "net/Kconfig"
-
-source "drivers/Kconfig"
-
-source "fs/Kconfig"
-
-menu "iSeries device drivers"
- depends on PPC_ISERIES
-
-config VIOCONS
- tristate "iSeries Virtual Console Support"
-
-config VIODASD
- tristate "iSeries Virtual I/O disk support"
- help
- If you are running on an iSeries system and you want to use
- virtual disks created and managed by OS/400, say Y.
-
-config VIOCD
- tristate "iSeries Virtual I/O CD support"
- help
- If you are running Linux on an IBM iSeries system and you want to
- read a CD drive owned by OS/400, say Y here.
-
-config VIOTAPE
- tristate "iSeries Virtual Tape Support"
- help
- If you are running Linux on an iSeries system and you want Linux
- to read and/or write a tape drive owned by OS/400, say Y here.
-
-endmenu
-
-config VIOPATH
- bool
- depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
- default y
-
-source "arch/powerpc/oprofile/Kconfig"
-
-source "arch/ppc64/Kconfig.debug"
-
-source "security/Kconfig"
-
-config KEYS_COMPAT
- bool
- depends on COMPAT && KEYS
- default y
-
-source "crypto/Kconfig"
-
-source "lib/Kconfig"
# Makefile for the linux ppc64 kernel.
#
-ifneq ($(CONFIG_PPC_MERGE),y)
-
-EXTRA_CFLAGS += -mno-minimal-toc
-extra-y := head.o vmlinux.lds
-
-obj-y := misc.o prom.o
-
-endif
-
-obj-y += idle.o dma.o \
- align.o \
- iommu.o
-
-pci-obj-$(CONFIG_PPC_MULTIPLATFORM) += pci_dn.o pci_direct_iommu.o
-
-obj-$(CONFIG_PCI) += pci.o pci_iommu.o iomap.o $(pci-obj-y)
+obj-y += idle.o align.o
obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o
-ifneq ($(CONFIG_PPC_MERGE),y)
-obj-$(CONFIG_PPC_MULTIPLATFORM) += prom_init.o
-endif
-
-obj-$(CONFIG_KEXEC) += machine_kexec.o
-obj-$(CONFIG_MODULES) += module.o
-ifneq ($(CONFIG_PPC_MERGE),y)
-obj-$(CONFIG_MODULES) += ppc_ksyms.o
-endif
-obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o
-ifneq ($(CONFIG_PPC_MERGE),y)
-obj-$(CONFIG_BOOTX_TEXT) += btext.o
-endif
-obj-$(CONFIG_HVCS) += hvcserver.o
-
-obj-$(CONFIG_KPROBES) += kprobes.o
-
-ifneq ($(CONFIG_PPC_MERGE),y)
-ifeq ($(CONFIG_PPC_ISERIES),y)
-arch/ppc64/kernel/head.o: arch/powerpc/kernel/lparmap.s
-AFLAGS_head.o += -Iarch/powerpc/kernel
-endif
-endif
+++ /dev/null
-/*
- * This program is used to generate definitions needed by
- * assembly language modules.
- *
- * We use the technique used in the OSF Mach kernel code:
- * generate asm statements containing #defines,
- * compile this file to assembler, and then extract the
- * #defines from the assembly-language output.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/time.h>
-#include <linux/hardirq.h>
-#include <asm/io.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-
-#include <asm/paca.h>
-#include <asm/lppaca.h>
-#include <asm/iseries/hv_lp_event.h>
-#include <asm/rtas.h>
-#include <asm/cputable.h>
-#include <asm/cache.h>
-#include <asm/systemcfg.h>
-#include <asm/compat.h>
-
-#define DEFINE(sym, val) \
- asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
-int main(void)
-{
- /* thread struct on stack */
- DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
- DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
- DEFINE(TI_SC_NOERR, offsetof(struct thread_info, syscall_noerror));
-
- /* task_struct->thread */
- DEFINE(THREAD, offsetof(struct task_struct, thread));
- DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
- DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
- DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
- DEFINE(THREAD_FPSCR, offsetof(struct thread_struct, fpscr));
- DEFINE(KSP, offsetof(struct thread_struct, ksp));
- DEFINE(KSP_VSID, offsetof(struct thread_struct, ksp_vsid));
-
-#ifdef CONFIG_ALTIVEC
- DEFINE(THREAD_VR0, offsetof(struct thread_struct, vr[0]));
- DEFINE(THREAD_VRSAVE, offsetof(struct thread_struct, vrsave));
- DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
- DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
-#endif /* CONFIG_ALTIVEC */
- DEFINE(MM, offsetof(struct task_struct, mm));
- DEFINE(AUDITCONTEXT, offsetof(struct task_struct, audit_context));
-
- DEFINE(DCACHEL1LINESIZE, offsetof(struct ppc64_caches, dline_size));
- DEFINE(DCACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_dline_size));
- DEFINE(DCACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, dlines_per_page));
- DEFINE(ICACHEL1LINESIZE, offsetof(struct ppc64_caches, iline_size));
- DEFINE(ICACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_iline_size));
- DEFINE(ICACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, ilines_per_page));
- DEFINE(PLATFORM_LPAR, PLATFORM_LPAR);
-
- /* paca */
- DEFINE(PACA_SIZE, sizeof(struct paca_struct));
- DEFINE(PACAPACAINDEX, offsetof(struct paca_struct, paca_index));
- DEFINE(PACAPROCSTART, offsetof(struct paca_struct, cpu_start));
- DEFINE(PACAKSAVE, offsetof(struct paca_struct, kstack));
- DEFINE(PACACURRENT, offsetof(struct paca_struct, __current));
- DEFINE(PACASAVEDMSR, offsetof(struct paca_struct, saved_msr));
- DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real));
- DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr));
- DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr));
- DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1));
- DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc));
- DEFINE(PACAPROCENABLED, offsetof(struct paca_struct, proc_enabled));
- DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
- DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
- DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
-#ifdef CONFIG_PPC_64K_PAGES
- DEFINE(PACAPGDIR, offsetof(struct paca_struct, pgdir));
-#endif
-#ifdef CONFIG_HUGETLB_PAGE
- DEFINE(PACALOWHTLBAREAS, offsetof(struct paca_struct, context.low_htlb_areas));
- DEFINE(PACAHIGHHTLBAREAS, offsetof(struct paca_struct, context.high_htlb_areas));
-#endif /* CONFIG_HUGETLB_PAGE */
- DEFINE(PACADEFAULTDECR, offsetof(struct paca_struct, default_decr));
- DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen));
- DEFINE(PACA_EXMC, offsetof(struct paca_struct, exmc));
- DEFINE(PACA_EXSLB, offsetof(struct paca_struct, exslb));
- DEFINE(PACA_EXDSI, offsetof(struct paca_struct, exdsi));
- DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp));
- DEFINE(PACALPPACA, offsetof(struct paca_struct, lppaca));
- DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id));
- DEFINE(LPPACASRR0, offsetof(struct lppaca, saved_srr0));
- DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1));
- DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int));
- DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int));
-
- /* RTAS */
- DEFINE(RTASBASE, offsetof(struct rtas_t, base));
- DEFINE(RTASENTRY, offsetof(struct rtas_t, entry));
-
- /* Interrupt register frame */
- DEFINE(STACK_FRAME_OVERHEAD, STACK_FRAME_OVERHEAD);
-
- DEFINE(SWITCH_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs));
-
- /* 288 = # of volatile regs, int & fp, for leaf routines */
- /* which do not stack a frame. See the PPC64 ABI. */
- DEFINE(INT_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 288);
- /* Create extra stack space for SRR0 and SRR1 when calling prom/rtas. */
- DEFINE(PROM_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 16);
- DEFINE(RTAS_FRAME_SIZE, STACK_FRAME_OVERHEAD + sizeof(struct pt_regs) + 16);
- DEFINE(GPR0, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[0]));
- DEFINE(GPR1, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[1]));
- DEFINE(GPR2, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[2]));
- DEFINE(GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[3]));
- DEFINE(GPR4, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[4]));
- DEFINE(GPR5, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[5]));
- DEFINE(GPR6, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[6]));
- DEFINE(GPR7, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[7]));
- DEFINE(GPR8, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[8]));
- DEFINE(GPR9, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[9]));
- DEFINE(GPR10, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[10]));
- DEFINE(GPR11, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[11]));
- DEFINE(GPR12, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[12]));
- DEFINE(GPR13, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, gpr[13]));
- /*
- * Note: these symbols include _ because they overlap with special
- * register names
- */
- DEFINE(_NIP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, nip));
- DEFINE(_MSR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, msr));
- DEFINE(_CTR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ctr));
- DEFINE(_LINK, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, link));
- DEFINE(_CCR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, ccr));
- DEFINE(_XER, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, xer));
- DEFINE(_DAR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dar));
- DEFINE(_DSISR, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, dsisr));
- DEFINE(ORIG_GPR3, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, orig_gpr3));
- DEFINE(RESULT, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, result));
- DEFINE(_TRAP, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, trap));
- DEFINE(SOFTE, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, softe));
-
- /* These _only_ to be used with {PROM,RTAS}_FRAME_SIZE!!! */
- DEFINE(_SRR0, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs));
- DEFINE(_SRR1, STACK_FRAME_OVERHEAD+sizeof(struct pt_regs)+8);
-
- DEFINE(CLONE_VM, CLONE_VM);
- DEFINE(CLONE_UNTRACED, CLONE_UNTRACED);
-
- /* About the CPU features table */
- DEFINE(CPU_SPEC_ENTRY_SIZE, sizeof(struct cpu_spec));
- DEFINE(CPU_SPEC_PVR_MASK, offsetof(struct cpu_spec, pvr_mask));
- DEFINE(CPU_SPEC_PVR_VALUE, offsetof(struct cpu_spec, pvr_value));
- DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
- DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
-
- /* systemcfg offsets for use by vdso */
- DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct systemcfg, tb_orig_stamp));
- DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct systemcfg, tb_ticks_per_sec));
- DEFINE(CFG_TB_TO_XS, offsetof(struct systemcfg, tb_to_xs));
- DEFINE(CFG_STAMP_XSEC, offsetof(struct systemcfg, stamp_xsec));
- DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct systemcfg, tb_update_count));
- DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct systemcfg, tz_minuteswest));
- DEFINE(CFG_TZ_DSTTIME, offsetof(struct systemcfg, tz_dsttime));
- DEFINE(CFG_SYSCALL_MAP32, offsetof(struct systemcfg, syscall_map_32));
- DEFINE(CFG_SYSCALL_MAP64, offsetof(struct systemcfg, syscall_map_64));
-
- /* timeval/timezone offsets for use by vdso */
- DEFINE(TVAL64_TV_SEC, offsetof(struct timeval, tv_sec));
- DEFINE(TVAL64_TV_USEC, offsetof(struct timeval, tv_usec));
- DEFINE(TVAL32_TV_SEC, offsetof(struct compat_timeval, tv_sec));
- DEFINE(TVAL32_TV_USEC, offsetof(struct compat_timeval, tv_usec));
- DEFINE(TZONE_TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
- DEFINE(TZONE_TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
-
- return 0;
-}
+++ /dev/null
-/*
- * Procedures for drawing on the screen early on in the boot process.
- *
- * Benjamin Herrenschmidt <benh@kernel.crashing.org>
- */
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/init.h>
-
-#include <asm/sections.h>
-#include <asm/prom.h>
-#include <asm/btext.h>
-#include <asm/prom.h>
-#include <asm/page.h>
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-#include <asm/io.h>
-#include <asm/lmb.h>
-#include <asm/processor.h>
-#include <asm/udbg.h>
-
-#undef NO_SCROLL
-
-#ifndef NO_SCROLL
-static void scrollscreen(void);
-#endif
-
-static void draw_byte(unsigned char c, long locX, long locY);
-static void draw_byte_32(unsigned char *bits, unsigned int *base, int rb);
-static void draw_byte_16(unsigned char *bits, unsigned int *base, int rb);
-static void draw_byte_8(unsigned char *bits, unsigned int *base, int rb);
-
-static int g_loc_X;
-static int g_loc_Y;
-static int g_max_loc_X;
-static int g_max_loc_Y;
-
-static int dispDeviceRowBytes;
-static int dispDeviceDepth;
-static int dispDeviceRect[4];
-static unsigned char *dispDeviceBase, *logicalDisplayBase;
-
-unsigned long disp_BAT[2] __initdata = {0, 0};
-
-#define cmapsz (16*256)
-
-static unsigned char vga_font[cmapsz];
-
-int boot_text_mapped;
-int force_printk_to_btext = 0;
-
-
-/* Here's a small text engine to use during early boot
- * or for debugging purposes
- *
- * todo:
- *
- * - build some kind of vgacon with it to enable early printk
- * - move to a separate file
- * - add a few video driver hooks to keep in sync with display
- * changes.
- */
-
-void map_boot_text(void)
-{
- unsigned long base, offset, size;
- unsigned char *vbase;
-
- /* By default, we are no longer mapped */
- boot_text_mapped = 0;
- if (dispDeviceBase == 0)
- return;
- base = ((unsigned long) dispDeviceBase) & 0xFFFFF000UL;
- offset = ((unsigned long) dispDeviceBase) - base;
- size = dispDeviceRowBytes * dispDeviceRect[3] + offset
- + dispDeviceRect[0];
- vbase = __ioremap(base, size, _PAGE_NO_CACHE);
- if (vbase == 0)
- return;
- logicalDisplayBase = vbase + offset;
- boot_text_mapped = 1;
-}
-
-int btext_initialize(struct device_node *np)
-{
- unsigned int width, height, depth, pitch;
- unsigned long address = 0;
- u32 *prop;
-
- prop = (u32 *)get_property(np, "width", NULL);
- if (prop == NULL)
- return -EINVAL;
- width = *prop;
- prop = (u32 *)get_property(np, "height", NULL);
- if (prop == NULL)
- return -EINVAL;
- height = *prop;
- prop = (u32 *)get_property(np, "depth", NULL);
- if (prop == NULL)
- return -EINVAL;
- depth = *prop;
- pitch = width * ((depth + 7) / 8);
- prop = (u32 *)get_property(np, "linebytes", NULL);
- if (prop)
- pitch = *prop;
- if (pitch == 1)
- pitch = 0x1000;
- prop = (u32 *)get_property(np, "address", NULL);
- if (prop)
- address = *prop;
-
- /* FIXME: Add support for PCI reg properties */
-
- if (address == 0)
- return -EINVAL;
-
- g_loc_X = 0;
- g_loc_Y = 0;
- g_max_loc_X = width / 8;
- g_max_loc_Y = height / 16;
- logicalDisplayBase = (unsigned char *)address;
- dispDeviceBase = (unsigned char *)address;
- dispDeviceRowBytes = pitch;
- dispDeviceDepth = depth;
- dispDeviceRect[0] = dispDeviceRect[1] = 0;
- dispDeviceRect[2] = width;
- dispDeviceRect[3] = height;
-
- map_boot_text();
-
- return 0;
-}
-
-static void btext_putc(unsigned char c)
-{
- btext_drawchar(c);
-}
-
-void __init init_boot_display(void)
-{
- char *name;
- struct device_node *np = NULL;
- int rc = -ENODEV;
-
- printk("trying to initialize btext ...\n");
-
- name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
- if (name != NULL) {
- np = of_find_node_by_path(name);
- if (np != NULL) {
- if (strcmp(np->type, "display") != 0) {
- printk("boot stdout isn't a display !\n");
- of_node_put(np);
- np = NULL;
- }
- }
- }
- if (np)
- rc = btext_initialize(np);
- if (rc) {
- for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
- if (get_property(np, "linux,opened", NULL)) {
- printk("trying %s ...\n", np->full_name);
- rc = btext_initialize(np);
- printk("result: %d\n", rc);
- }
- if (rc == 0)
- break;
- }
- }
- if (rc == 0 && udbg_putc == NULL)
- udbg_putc = btext_putc;
-}
-
-
-/* Calc the base address of a given point (x,y) */
-static unsigned char * calc_base(int x, int y)
-{
- unsigned char *base;
-
- base = logicalDisplayBase;
- if (base == 0)
- base = dispDeviceBase;
- base += (x + dispDeviceRect[0]) * (dispDeviceDepth >> 3);
- base += (y + dispDeviceRect[1]) * dispDeviceRowBytes;
- return base;
-}
-
-/* Adjust the display to a new resolution */
-void btext_update_display(unsigned long phys, int width, int height,
- int depth, int pitch)
-{
- if (dispDeviceBase == 0)
- return;
-
- /* check it's the same frame buffer (within 256MB) */
- if ((phys ^ (unsigned long)dispDeviceBase) & 0xf0000000)
- return;
-
- dispDeviceBase = (__u8 *) phys;
- dispDeviceRect[0] = 0;
- dispDeviceRect[1] = 0;
- dispDeviceRect[2] = width;
- dispDeviceRect[3] = height;
- dispDeviceDepth = depth;
- dispDeviceRowBytes = pitch;
- if (boot_text_mapped) {
- iounmap(logicalDisplayBase);
- boot_text_mapped = 0;
- }
- map_boot_text();
- g_loc_X = 0;
- g_loc_Y = 0;
- g_max_loc_X = width / 8;
- g_max_loc_Y = height / 16;
-}
-
-void btext_clearscreen(void)
-{
- unsigned long *base = (unsigned long *)calc_base(0, 0);
- unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) *
- (dispDeviceDepth >> 3)) >> 3;
- int i,j;
-
- for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1]); i++)
- {
- unsigned long *ptr = base;
- for(j=width; j; --j)
- *(ptr++) = 0;
- base += (dispDeviceRowBytes >> 3);
- }
-}
-
-#ifndef NO_SCROLL
-static void scrollscreen(void)
-{
- unsigned long *src = (unsigned long *)calc_base(0,16);
- unsigned long *dst = (unsigned long *)calc_base(0,0);
- unsigned long width = ((dispDeviceRect[2] - dispDeviceRect[0]) *
- (dispDeviceDepth >> 3)) >> 3;
- int i,j;
-
- for (i=0; i<(dispDeviceRect[3] - dispDeviceRect[1] - 16); i++)
- {
- unsigned long *src_ptr = src;
- unsigned long *dst_ptr = dst;
- for(j=width; j; --j)
- *(dst_ptr++) = *(src_ptr++);
- src += (dispDeviceRowBytes >> 3);
- dst += (dispDeviceRowBytes >> 3);
- }
- for (i=0; i<16; i++)
- {
- unsigned long *dst_ptr = dst;
- for(j=width; j; --j)
- *(dst_ptr++) = 0;
- dst += (dispDeviceRowBytes >> 3);
- }
-}
-#endif /* ndef NO_SCROLL */
-
-void btext_drawchar(char c)
-{
- int cline = 0;
-#ifdef NO_SCROLL
- int x;
-#endif
- if (!boot_text_mapped)
- return;
-
- switch (c) {
- case '\b':
- if (g_loc_X > 0)
- --g_loc_X;
- break;
- case '\t':
- g_loc_X = (g_loc_X & -8) + 8;
- break;
- case '\r':
- g_loc_X = 0;
- break;
- case '\n':
- g_loc_X = 0;
- g_loc_Y++;
- cline = 1;
- break;
- default:
- draw_byte(c, g_loc_X++, g_loc_Y);
- }
- if (g_loc_X >= g_max_loc_X) {
- g_loc_X = 0;
- g_loc_Y++;
- cline = 1;
- }
-#ifndef NO_SCROLL
- while (g_loc_Y >= g_max_loc_Y) {
- scrollscreen();
- g_loc_Y--;
- }
-#else
- /* wrap around from bottom to top of screen so we don't
- waste time scrolling each line. -- paulus. */
- if (g_loc_Y >= g_max_loc_Y)
- g_loc_Y = 0;
- if (cline) {
- for (x = 0; x < g_max_loc_X; ++x)
- draw_byte(' ', x, g_loc_Y);
- }
-#endif
-}
-
-void btext_drawstring(const char *c)
-{
- if (!boot_text_mapped)
- return;
- while (*c)
- btext_drawchar(*c++);
-}
-
-void btext_drawhex(unsigned long v)
-{
- char *hex_table = "0123456789abcdef";
-
- if (!boot_text_mapped)
- return;
- btext_drawchar(hex_table[(v >> 60) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 56) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 52) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 48) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 44) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 40) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 36) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 32) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 28) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 24) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 20) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 16) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 12) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 8) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 4) & 0x0000000FUL]);
- btext_drawchar(hex_table[(v >> 0) & 0x0000000FUL]);
- btext_drawchar(' ');
-}
-
-static void draw_byte(unsigned char c, long locX, long locY)
-{
- unsigned char *base = calc_base(locX << 3, locY << 4);
- unsigned char *font = &vga_font[((unsigned int)c) * 16];
- int rb = dispDeviceRowBytes;
-
- switch(dispDeviceDepth) {
- case 24:
- case 32:
- draw_byte_32(font, (unsigned int *)base, rb);
- break;
- case 15:
- case 16:
- draw_byte_16(font, (unsigned int *)base, rb);
- break;
- case 8:
- draw_byte_8(font, (unsigned int *)base, rb);
- break;
- }
-}
-
-static unsigned int expand_bits_8[16] = {
- 0x00000000,
- 0x000000ff,
- 0x0000ff00,
- 0x0000ffff,
- 0x00ff0000,
- 0x00ff00ff,
- 0x00ffff00,
- 0x00ffffff,
- 0xff000000,
- 0xff0000ff,
- 0xff00ff00,
- 0xff00ffff,
- 0xffff0000,
- 0xffff00ff,
- 0xffffff00,
- 0xffffffff
-};
-
-static unsigned int expand_bits_16[4] = {
- 0x00000000,
- 0x0000ffff,
- 0xffff0000,
- 0xffffffff
-};
-
-
-static void draw_byte_32(unsigned char *font, unsigned int *base, int rb)
-{
- int l, bits;
- int fg = 0xFFFFFFFFUL;
- int bg = 0x00000000UL;
-
- for (l = 0; l < 16; ++l)
- {
- bits = *font++;
- base[0] = (-(bits >> 7) & fg) ^ bg;
- base[1] = (-((bits >> 6) & 1) & fg) ^ bg;
- base[2] = (-((bits >> 5) & 1) & fg) ^ bg;
- base[3] = (-((bits >> 4) & 1) & fg) ^ bg;
- base[4] = (-((bits >> 3) & 1) & fg) ^ bg;
- base[5] = (-((bits >> 2) & 1) & fg) ^ bg;
- base[6] = (-((bits >> 1) & 1) & fg) ^ bg;
- base[7] = (-(bits & 1) & fg) ^ bg;
- base = (unsigned int *) ((char *)base + rb);
- }
-}
-
-static void draw_byte_16(unsigned char *font, unsigned int *base, int rb)
-{
- int l, bits;
- int fg = 0xFFFFFFFFUL;
- int bg = 0x00000000UL;
- unsigned int *eb = (int *)expand_bits_16;
-
- for (l = 0; l < 16; ++l)
- {
- bits = *font++;
- base[0] = (eb[bits >> 6] & fg) ^ bg;
- base[1] = (eb[(bits >> 4) & 3] & fg) ^ bg;
- base[2] = (eb[(bits >> 2) & 3] & fg) ^ bg;
- base[3] = (eb[bits & 3] & fg) ^ bg;
- base = (unsigned int *) ((char *)base + rb);
- }
-}
-
-static void draw_byte_8(unsigned char *font, unsigned int *base, int rb)
-{
- int l, bits;
- int fg = 0x0F0F0F0FUL;
- int bg = 0x00000000UL;
- unsigned int *eb = (int *)expand_bits_8;
-
- for (l = 0; l < 16; ++l)
- {
- bits = *font++;
- base[0] = (eb[bits >> 4] & fg) ^ bg;
- base[1] = (eb[bits & 0xf] & fg) ^ bg;
- base = (unsigned int *) ((char *)base + rb);
- }
-}
-
-static unsigned char vga_font[cmapsz] = {
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x81, 0xa5, 0x81, 0x81, 0xbd,
-0x99, 0x81, 0x81, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xff,
-0xdb, 0xff, 0xff, 0xc3, 0xe7, 0xff, 0xff, 0x7e, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x6c, 0xfe, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x10,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x38, 0x7c, 0xfe,
-0x7c, 0x38, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,
-0x3c, 0x3c, 0xe7, 0xe7, 0xe7, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0x7e, 0x18, 0x18, 0x3c,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c,
-0x3c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
-0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x66, 0x42, 0x42, 0x66, 0x3c, 0x00,
-0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc3, 0x99, 0xbd,
-0xbd, 0x99, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x1e, 0x0e,
-0x1a, 0x32, 0x78, 0xcc, 0xcc, 0xcc, 0xcc, 0x78, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x3c, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18, 0x18,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x33, 0x3f, 0x30, 0x30, 0x30,
-0x30, 0x70, 0xf0, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x63,
-0x7f, 0x63, 0x63, 0x63, 0x63, 0x67, 0xe7, 0xe6, 0xc0, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x18, 0x18, 0xdb, 0x3c, 0xe7, 0x3c, 0xdb, 0x18, 0x18,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfe, 0xf8,
-0xf0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x06, 0x0e,
-0x1e, 0x3e, 0xfe, 0x3e, 0x1e, 0x0e, 0x06, 0x02, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
-0x66, 0x00, 0x66, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xdb,
-0xdb, 0xdb, 0x7b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x7c, 0xc6, 0x60, 0x38, 0x6c, 0xc6, 0xc6, 0x6c, 0x38, 0x0c, 0xc6,
-0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0xfe, 0xfe, 0xfe, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c,
-0x7e, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x7e, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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-0x00, 0x00, 0x00, 0x00,
-};
+++ /dev/null
-/*
- * arch/ppc64/kernel/head.S
- *
- * PowerPC version
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
- * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
- * Adapted for Power Macintosh by Paul Mackerras.
- * Low-level exception handlers and MMU support
- * rewritten by Paul Mackerras.
- * Copyright (C) 1996 Paul Mackerras.
- *
- * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
- * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com
- *
- * This file contains the low-level support and setup for the
- * PowerPC-64 platform, including trap and interrupt dispatch.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <linux/threads.h>
-#include <asm/processor.h>
-#include <asm/page.h>
-#include <asm/mmu.h>
-#include <asm/ppc_asm.h>
-#include <asm/asm-offsets.h>
-#include <asm/bug.h>
-#include <asm/cputable.h>
-#include <asm/setup.h>
-#include <asm/hvcall.h>
-#include <asm/iseries/lpar_map.h>
-#include <asm/thread_info.h>
-
-#ifdef CONFIG_PPC_ISERIES
-#define DO_SOFT_DISABLE
-#endif
-
-/*
- * We layout physical memory as follows:
- * 0x0000 - 0x00ff : Secondary processor spin code
- * 0x0100 - 0x2fff : pSeries Interrupt prologs
- * 0x3000 - 0x5fff : interrupt support, iSeries and common interrupt prologs
- * 0x6000 - 0x6fff : Initial (CPU0) segment table
- * 0x7000 - 0x7fff : FWNMI data area
- * 0x8000 - : Early init and support code
- */
-
-/*
- * SPRG Usage
- *
- * Register Definition
- *
- * SPRG0 reserved for hypervisor
- * SPRG1 temp - used to save gpr
- * SPRG2 temp - used to save gpr
- * SPRG3 virt addr of paca
- */
-
-/*
- * Entering into this code we make the following assumptions:
- * For pSeries:
- * 1. The MMU is off & open firmware is running in real mode.
- * 2. The kernel is entered at __start
- *
- * For iSeries:
- * 1. The MMU is on (as it always is for iSeries)
- * 2. The kernel is entered at system_reset_iSeries
- */
-
- .text
- .globl _stext
-_stext:
-#ifdef CONFIG_PPC_MULTIPLATFORM
-_GLOBAL(__start)
- /* NOP this out unconditionally */
-BEGIN_FTR_SECTION
- b .__start_initialization_multiplatform
-END_FTR_SECTION(0, 1)
-#endif /* CONFIG_PPC_MULTIPLATFORM */
-
- /* Catch branch to 0 in real mode */
- trap
-
-#ifdef CONFIG_PPC_ISERIES
- /*
- * At offset 0x20, there is a pointer to iSeries LPAR data.
- * This is required by the hypervisor
- */
- . = 0x20
- .llong hvReleaseData-KERNELBASE
-
- /*
- * At offset 0x28 and 0x30 are offsets to the mschunks_map
- * array (used by the iSeries LPAR debugger to do translation
- * between physical addresses and absolute addresses) and
- * to the pidhash table (also used by the debugger)
- */
- .llong mschunks_map-KERNELBASE
- .llong 0 /* pidhash-KERNELBASE SFRXXX */
-
- /* Offset 0x38 - Pointer to start of embedded System.map */
- .globl embedded_sysmap_start
-embedded_sysmap_start:
- .llong 0
- /* Offset 0x40 - Pointer to end of embedded System.map */
- .globl embedded_sysmap_end
-embedded_sysmap_end:
- .llong 0
-
-#endif /* CONFIG_PPC_ISERIES */
-
- /* Secondary processors spin on this value until it goes to 1. */
- .globl __secondary_hold_spinloop
-__secondary_hold_spinloop:
- .llong 0x0
-
- /* Secondary processors write this value with their cpu # */
- /* after they enter the spin loop immediately below. */
- .globl __secondary_hold_acknowledge
-__secondary_hold_acknowledge:
- .llong 0x0
-
- . = 0x60
-/*
- * The following code is used on pSeries to hold secondary processors
- * in a spin loop after they have been freed from OpenFirmware, but
- * before the bulk of the kernel has been relocated. This code
- * is relocated to physical address 0x60 before prom_init is run.
- * All of it must fit below the first exception vector at 0x100.
- */
-_GLOBAL(__secondary_hold)
- mfmsr r24
- ori r24,r24,MSR_RI
- mtmsrd r24 /* RI on */
-
- /* Grab our linux cpu number */
- mr r24,r3
-
- /* Tell the master cpu we're here */
- /* Relocation is off & we are located at an address less */
- /* than 0x100, so only need to grab low order offset. */
- std r24,__secondary_hold_acknowledge@l(0)
- sync
-
- /* All secondary cpus wait here until told to start. */
-100: ld r4,__secondary_hold_spinloop@l(0)
- cmpdi 0,r4,1
- bne 100b
-
-#ifdef CONFIG_HMT
- b .hmt_init
-#else
-#ifdef CONFIG_SMP
- mr r3,r24
- b .pSeries_secondary_smp_init
-#else
- BUG_OPCODE
-#endif
-#endif
-
-/* This value is used to mark exception frames on the stack. */
- .section ".toc","aw"
-exception_marker:
- .tc ID_72656773_68657265[TC],0x7265677368657265
- .text
-
-/*
- * The following macros define the code that appears as
- * the prologue to each of the exception handlers. They
- * are split into two parts to allow a single kernel binary
- * to be used for pSeries and iSeries.
- * LOL. One day... - paulus
- */
-
-/*
- * We make as much of the exception code common between native
- * exception handlers (including pSeries LPAR) and iSeries LPAR
- * implementations as possible.
- */
-
-/*
- * This is the start of the interrupt handlers for pSeries
- * This code runs with relocation off.
- */
-#define EX_R9 0
-#define EX_R10 8
-#define EX_R11 16
-#define EX_R12 24
-#define EX_R13 32
-#define EX_SRR0 40
-#define EX_DAR 48
-#define EX_DSISR 56
-#define EX_CCR 60
-#define EX_R3 64
-#define EX_LR 72
-
-#define EXCEPTION_PROLOG_PSERIES(area, label) \
- mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \
- std r9,area+EX_R9(r13); /* save r9 - r12 */ \
- std r10,area+EX_R10(r13); \
- std r11,area+EX_R11(r13); \
- std r12,area+EX_R12(r13); \
- mfspr r9,SPRN_SPRG1; \
- std r9,area+EX_R13(r13); \
- mfcr r9; \
- clrrdi r12,r13,32; /* get high part of &label */ \
- mfmsr r10; \
- mfspr r11,SPRN_SRR0; /* save SRR0 */ \
- ori r12,r12,(label)@l; /* virt addr of handler */ \
- ori r10,r10,MSR_IR|MSR_DR|MSR_RI; \
- mtspr SPRN_SRR0,r12; \
- mfspr r12,SPRN_SRR1; /* and SRR1 */ \
- mtspr SPRN_SRR1,r10; \
- rfid; \
- b . /* prevent speculative execution */
-
-/*
- * This is the start of the interrupt handlers for iSeries
- * This code runs with relocation on.
- */
-#define EXCEPTION_PROLOG_ISERIES_1(area) \
- mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \
- std r9,area+EX_R9(r13); /* save r9 - r12 */ \
- std r10,area+EX_R10(r13); \
- std r11,area+EX_R11(r13); \
- std r12,area+EX_R12(r13); \
- mfspr r9,SPRN_SPRG1; \
- std r9,area+EX_R13(r13); \
- mfcr r9
-
-#define EXCEPTION_PROLOG_ISERIES_2 \
- mfmsr r10; \
- ld r11,PACALPPACA+LPPACASRR0(r13); \
- ld r12,PACALPPACA+LPPACASRR1(r13); \
- ori r10,r10,MSR_RI; \
- mtmsrd r10,1
-
-/*
- * The common exception prolog is used for all except a few exceptions
- * such as a segment miss on a kernel address. We have to be prepared
- * to take another exception from the point where we first touch the
- * kernel stack onwards.
- *
- * On entry r13 points to the paca, r9-r13 are saved in the paca,
- * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
- * SRR1, and relocation is on.
- */
-#define EXCEPTION_PROLOG_COMMON(n, area) \
- andi. r10,r12,MSR_PR; /* See if coming from user */ \
- mr r10,r1; /* Save r1 */ \
- subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \
- beq- 1f; \
- ld r1,PACAKSAVE(r13); /* kernel stack to use */ \
-1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \
- bge- cr1,bad_stack; /* abort if it is */ \
- std r9,_CCR(r1); /* save CR in stackframe */ \
- std r11,_NIP(r1); /* save SRR0 in stackframe */ \
- std r12,_MSR(r1); /* save SRR1 in stackframe */ \
- std r10,0(r1); /* make stack chain pointer */ \
- std r0,GPR0(r1); /* save r0 in stackframe */ \
- std r10,GPR1(r1); /* save r1 in stackframe */ \
- std r2,GPR2(r1); /* save r2 in stackframe */ \
- SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
- SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
- ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \
- ld r10,area+EX_R10(r13); \
- std r9,GPR9(r1); \
- std r10,GPR10(r1); \
- ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \
- ld r10,area+EX_R12(r13); \
- ld r11,area+EX_R13(r13); \
- std r9,GPR11(r1); \
- std r10,GPR12(r1); \
- std r11,GPR13(r1); \
- ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
- mflr r9; /* save LR in stackframe */ \
- std r9,_LINK(r1); \
- mfctr r10; /* save CTR in stackframe */ \
- std r10,_CTR(r1); \
- mfspr r11,SPRN_XER; /* save XER in stackframe */ \
- std r11,_XER(r1); \
- li r9,(n)+1; \
- std r9,_TRAP(r1); /* set trap number */ \
- li r10,0; \
- ld r11,exception_marker@toc(r2); \
- std r10,RESULT(r1); /* clear regs->result */ \
- std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */
-
-/*
- * Exception vectors.
- */
-#define STD_EXCEPTION_PSERIES(n, label) \
- . = n; \
- .globl label##_pSeries; \
-label##_pSeries: \
- HMT_MEDIUM; \
- mtspr SPRN_SPRG1,r13; /* save r13 */ \
- RUNLATCH_ON(r13); \
- EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common)
-
-#define STD_EXCEPTION_ISERIES(n, label, area) \
- .globl label##_iSeries; \
-label##_iSeries: \
- HMT_MEDIUM; \
- mtspr SPRN_SPRG1,r13; /* save r13 */ \
- RUNLATCH_ON(r13); \
- EXCEPTION_PROLOG_ISERIES_1(area); \
- EXCEPTION_PROLOG_ISERIES_2; \
- b label##_common
-
-#define MASKABLE_EXCEPTION_ISERIES(n, label) \
- .globl label##_iSeries; \
-label##_iSeries: \
- HMT_MEDIUM; \
- mtspr SPRN_SPRG1,r13; /* save r13 */ \
- RUNLATCH_ON(r13); \
- EXCEPTION_PROLOG_ISERIES_1(PACA_EXGEN); \
- lbz r10,PACAPROCENABLED(r13); \
- cmpwi 0,r10,0; \
- beq- label##_iSeries_masked; \
- EXCEPTION_PROLOG_ISERIES_2; \
- b label##_common; \
-
-#ifdef DO_SOFT_DISABLE
-#define DISABLE_INTS \
- lbz r10,PACAPROCENABLED(r13); \
- li r11,0; \
- std r10,SOFTE(r1); \
- mfmsr r10; \
- stb r11,PACAPROCENABLED(r13); \
- ori r10,r10,MSR_EE; \
- mtmsrd r10,1
-
-#define ENABLE_INTS \
- lbz r10,PACAPROCENABLED(r13); \
- mfmsr r11; \
- std r10,SOFTE(r1); \
- ori r11,r11,MSR_EE; \
- mtmsrd r11,1
-
-#else /* hard enable/disable interrupts */
-#define DISABLE_INTS
-
-#define ENABLE_INTS \
- ld r12,_MSR(r1); \
- mfmsr r11; \
- rlwimi r11,r12,0,MSR_EE; \
- mtmsrd r11,1
-
-#endif
-
-#define STD_EXCEPTION_COMMON(trap, label, hdlr) \
- .align 7; \
- .globl label##_common; \
-label##_common: \
- EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \
- DISABLE_INTS; \
- bl .save_nvgprs; \
- addi r3,r1,STACK_FRAME_OVERHEAD; \
- bl hdlr; \
- b .ret_from_except
-
-#define STD_EXCEPTION_COMMON_LITE(trap, label, hdlr) \
- .align 7; \
- .globl label##_common; \
-label##_common: \
- EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \
- DISABLE_INTS; \
- addi r3,r1,STACK_FRAME_OVERHEAD; \
- bl hdlr; \
- b .ret_from_except_lite
-
-/*
- * Start of pSeries system interrupt routines
- */
- . = 0x100
- .globl __start_interrupts
-__start_interrupts:
-
- STD_EXCEPTION_PSERIES(0x100, system_reset)
-
- . = 0x200
-_machine_check_pSeries:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13 /* save r13 */
- RUNLATCH_ON(r13)
- EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
-
- . = 0x300
- .globl data_access_pSeries
-data_access_pSeries:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13
-BEGIN_FTR_SECTION
- mtspr SPRN_SPRG2,r12
- mfspr r13,SPRN_DAR
- mfspr r12,SPRN_DSISR
- srdi r13,r13,60
- rlwimi r13,r12,16,0x20
- mfcr r12
- cmpwi r13,0x2c
- beq .do_stab_bolted_pSeries
- mtcrf 0x80,r12
- mfspr r12,SPRN_SPRG2
-END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
- EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common)
-
- . = 0x380
- .globl data_access_slb_pSeries
-data_access_slb_pSeries:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13
- RUNLATCH_ON(r13)
- mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
- std r3,PACA_EXSLB+EX_R3(r13)
- mfspr r3,SPRN_DAR
- std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
- mfcr r9
-#ifdef __DISABLED__
- /* Keep that around for when we re-implement dynamic VSIDs */
- cmpdi r3,0
- bge slb_miss_user_pseries
-#endif /* __DISABLED__ */
- std r10,PACA_EXSLB+EX_R10(r13)
- std r11,PACA_EXSLB+EX_R11(r13)
- std r12,PACA_EXSLB+EX_R12(r13)
- mfspr r10,SPRN_SPRG1
- std r10,PACA_EXSLB+EX_R13(r13)
- mfspr r12,SPRN_SRR1 /* and SRR1 */
- b .slb_miss_realmode /* Rel. branch works in real mode */
-
- STD_EXCEPTION_PSERIES(0x400, instruction_access)
-
- . = 0x480
- .globl instruction_access_slb_pSeries
-instruction_access_slb_pSeries:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13
- RUNLATCH_ON(r13)
- mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
- std r3,PACA_EXSLB+EX_R3(r13)
- mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
- std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
- mfcr r9
-#ifdef __DISABLED__
- /* Keep that around for when we re-implement dynamic VSIDs */
- cmpdi r3,0
- bge slb_miss_user_pseries
-#endif /* __DISABLED__ */
- std r10,PACA_EXSLB+EX_R10(r13)
- std r11,PACA_EXSLB+EX_R11(r13)
- std r12,PACA_EXSLB+EX_R12(r13)
- mfspr r10,SPRN_SPRG1
- std r10,PACA_EXSLB+EX_R13(r13)
- mfspr r12,SPRN_SRR1 /* and SRR1 */
- b .slb_miss_realmode /* Rel. branch works in real mode */
-
- STD_EXCEPTION_PSERIES(0x500, hardware_interrupt)
- STD_EXCEPTION_PSERIES(0x600, alignment)
- STD_EXCEPTION_PSERIES(0x700, program_check)
- STD_EXCEPTION_PSERIES(0x800, fp_unavailable)
- STD_EXCEPTION_PSERIES(0x900, decrementer)
- STD_EXCEPTION_PSERIES(0xa00, trap_0a)
- STD_EXCEPTION_PSERIES(0xb00, trap_0b)
-
- . = 0xc00
- .globl system_call_pSeries
-system_call_pSeries:
- HMT_MEDIUM
- RUNLATCH_ON(r9)
- mr r9,r13
- mfmsr r10
- mfspr r13,SPRN_SPRG3
- mfspr r11,SPRN_SRR0
- clrrdi r12,r13,32
- oris r12,r12,system_call_common@h
- ori r12,r12,system_call_common@l
- mtspr SPRN_SRR0,r12
- ori r10,r10,MSR_IR|MSR_DR|MSR_RI
- mfspr r12,SPRN_SRR1
- mtspr SPRN_SRR1,r10
- rfid
- b . /* prevent speculative execution */
-
- STD_EXCEPTION_PSERIES(0xd00, single_step)
- STD_EXCEPTION_PSERIES(0xe00, trap_0e)
-
- /* We need to deal with the Altivec unavailable exception
- * here which is at 0xf20, thus in the middle of the
- * prolog code of the PerformanceMonitor one. A little
- * trickery is thus necessary
- */
- . = 0xf00
- b performance_monitor_pSeries
-
- STD_EXCEPTION_PSERIES(0xf20, altivec_unavailable)
-
- STD_EXCEPTION_PSERIES(0x1300, instruction_breakpoint)
- STD_EXCEPTION_PSERIES(0x1700, altivec_assist)
-
- . = 0x3000
-
-/*** pSeries interrupt support ***/
-
- /* moved from 0xf00 */
- STD_EXCEPTION_PSERIES(., performance_monitor)
-
- .align 7
-_GLOBAL(do_stab_bolted_pSeries)
- mtcrf 0x80,r12
- mfspr r12,SPRN_SPRG2
- EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted)
-
-/*
- * We have some room here we use that to put
- * the peries slb miss user trampoline code so it's reasonably
- * away from slb_miss_user_common to avoid problems with rfid
- *
- * This is used for when the SLB miss handler has to go virtual,
- * which doesn't happen for now anymore but will once we re-implement
- * dynamic VSIDs for shared page tables
- */
-#ifdef __DISABLED__
-slb_miss_user_pseries:
- std r10,PACA_EXGEN+EX_R10(r13)
- std r11,PACA_EXGEN+EX_R11(r13)
- std r12,PACA_EXGEN+EX_R12(r13)
- mfspr r10,SPRG1
- ld r11,PACA_EXSLB+EX_R9(r13)
- ld r12,PACA_EXSLB+EX_R3(r13)
- std r10,PACA_EXGEN+EX_R13(r13)
- std r11,PACA_EXGEN+EX_R9(r13)
- std r12,PACA_EXGEN+EX_R3(r13)
- clrrdi r12,r13,32
- mfmsr r10
- mfspr r11,SRR0 /* save SRR0 */
- ori r12,r12,slb_miss_user_common@l /* virt addr of handler */
- ori r10,r10,MSR_IR|MSR_DR|MSR_RI
- mtspr SRR0,r12
- mfspr r12,SRR1 /* and SRR1 */
- mtspr SRR1,r10
- rfid
- b . /* prevent spec. execution */
-#endif /* __DISABLED__ */
-
-/*
- * Vectors for the FWNMI option. Share common code.
- */
- .globl system_reset_fwnmi
-system_reset_fwnmi:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13 /* save r13 */
- RUNLATCH_ON(r13)
- EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common)
-
- .globl machine_check_fwnmi
-machine_check_fwnmi:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13 /* save r13 */
- RUNLATCH_ON(r13)
- EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
-
-#ifdef CONFIG_PPC_ISERIES
-/*** ISeries-LPAR interrupt handlers ***/
-
- STD_EXCEPTION_ISERIES(0x200, machine_check, PACA_EXMC)
-
- .globl data_access_iSeries
-data_access_iSeries:
- mtspr SPRN_SPRG1,r13
-BEGIN_FTR_SECTION
- mtspr SPRN_SPRG2,r12
- mfspr r13,SPRN_DAR
- mfspr r12,SPRN_DSISR
- srdi r13,r13,60
- rlwimi r13,r12,16,0x20
- mfcr r12
- cmpwi r13,0x2c
- beq .do_stab_bolted_iSeries
- mtcrf 0x80,r12
- mfspr r12,SPRN_SPRG2
-END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
- EXCEPTION_PROLOG_ISERIES_1(PACA_EXGEN)
- EXCEPTION_PROLOG_ISERIES_2
- b data_access_common
-
-.do_stab_bolted_iSeries:
- mtcrf 0x80,r12
- mfspr r12,SPRN_SPRG2
- EXCEPTION_PROLOG_ISERIES_1(PACA_EXSLB)
- EXCEPTION_PROLOG_ISERIES_2
- b .do_stab_bolted
-
- .globl data_access_slb_iSeries
-data_access_slb_iSeries:
- mtspr SPRN_SPRG1,r13 /* save r13 */
- mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
- std r3,PACA_EXSLB+EX_R3(r13)
- mfspr r3,SPRN_DAR
- std r9,PACA_EXSLB+EX_R9(r13)
- mfcr r9
-#ifdef __DISABLED__
- cmpdi r3,0
- bge slb_miss_user_iseries
-#endif
- std r10,PACA_EXSLB+EX_R10(r13)
- std r11,PACA_EXSLB+EX_R11(r13)
- std r12,PACA_EXSLB+EX_R12(r13)
- mfspr r10,SPRN_SPRG1
- std r10,PACA_EXSLB+EX_R13(r13)
- ld r12,PACALPPACA+LPPACASRR1(r13);
- b .slb_miss_realmode
-
- STD_EXCEPTION_ISERIES(0x400, instruction_access, PACA_EXGEN)
-
- .globl instruction_access_slb_iSeries
-instruction_access_slb_iSeries:
- mtspr SPRN_SPRG1,r13 /* save r13 */
- mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
- std r3,PACA_EXSLB+EX_R3(r13)
- ld r3,PACALPPACA+LPPACASRR0(r13) /* get SRR0 value */
- std r9,PACA_EXSLB+EX_R9(r13)
- mfcr r9
-#ifdef __DISABLED__
- cmpdi r3,0
- bge .slb_miss_user_iseries
-#endif
- std r10,PACA_EXSLB+EX_R10(r13)
- std r11,PACA_EXSLB+EX_R11(r13)
- std r12,PACA_EXSLB+EX_R12(r13)
- mfspr r10,SPRN_SPRG1
- std r10,PACA_EXSLB+EX_R13(r13)
- ld r12,PACALPPACA+LPPACASRR1(r13);
- b .slb_miss_realmode
-
-#ifdef __DISABLED__
-slb_miss_user_iseries:
- std r10,PACA_EXGEN+EX_R10(r13)
- std r11,PACA_EXGEN+EX_R11(r13)
- std r12,PACA_EXGEN+EX_R12(r13)
- mfspr r10,SPRG1
- ld r11,PACA_EXSLB+EX_R9(r13)
- ld r12,PACA_EXSLB+EX_R3(r13)
- std r10,PACA_EXGEN+EX_R13(r13)
- std r11,PACA_EXGEN+EX_R9(r13)
- std r12,PACA_EXGEN+EX_R3(r13)
- EXCEPTION_PROLOG_ISERIES_2
- b slb_miss_user_common
-#endif
-
- MASKABLE_EXCEPTION_ISERIES(0x500, hardware_interrupt)
- STD_EXCEPTION_ISERIES(0x600, alignment, PACA_EXGEN)
- STD_EXCEPTION_ISERIES(0x700, program_check, PACA_EXGEN)
- STD_EXCEPTION_ISERIES(0x800, fp_unavailable, PACA_EXGEN)
- MASKABLE_EXCEPTION_ISERIES(0x900, decrementer)
- STD_EXCEPTION_ISERIES(0xa00, trap_0a, PACA_EXGEN)
- STD_EXCEPTION_ISERIES(0xb00, trap_0b, PACA_EXGEN)
-
- .globl system_call_iSeries
-system_call_iSeries:
- mr r9,r13
- mfspr r13,SPRN_SPRG3
- EXCEPTION_PROLOG_ISERIES_2
- b system_call_common
-
- STD_EXCEPTION_ISERIES( 0xd00, single_step, PACA_EXGEN)
- STD_EXCEPTION_ISERIES( 0xe00, trap_0e, PACA_EXGEN)
- STD_EXCEPTION_ISERIES( 0xf00, performance_monitor, PACA_EXGEN)
-
- .globl system_reset_iSeries
-system_reset_iSeries:
- mfspr r13,SPRN_SPRG3 /* Get paca address */
- mfmsr r24
- ori r24,r24,MSR_RI
- mtmsrd r24 /* RI on */
- lhz r24,PACAPACAINDEX(r13) /* Get processor # */
- cmpwi 0,r24,0 /* Are we processor 0? */
- beq .__start_initialization_iSeries /* Start up the first processor */
- mfspr r4,SPRN_CTRLF
- li r5,CTRL_RUNLATCH /* Turn off the run light */
- andc r4,r4,r5
- mtspr SPRN_CTRLT,r4
-
-1:
- HMT_LOW
-#ifdef CONFIG_SMP
- lbz r23,PACAPROCSTART(r13) /* Test if this processor
- * should start */
- sync
- LOADADDR(r3,current_set)
- sldi r28,r24,3 /* get current_set[cpu#] */
- ldx r3,r3,r28
- addi r1,r3,THREAD_SIZE
- subi r1,r1,STACK_FRAME_OVERHEAD
-
- cmpwi 0,r23,0
- beq iSeries_secondary_smp_loop /* Loop until told to go */
- bne .__secondary_start /* Loop until told to go */
-iSeries_secondary_smp_loop:
- /* Let the Hypervisor know we are alive */
- /* 8002 is a call to HvCallCfg::getLps, a harmless Hypervisor function */
- lis r3,0x8002
- rldicr r3,r3,32,15 /* r0 = (r3 << 32) & 0xffff000000000000 */
-#else /* CONFIG_SMP */
- /* Yield the processor. This is required for non-SMP kernels
- which are running on multi-threaded machines. */
- lis r3,0x8000
- rldicr r3,r3,32,15 /* r3 = (r3 << 32) & 0xffff000000000000 */
- addi r3,r3,18 /* r3 = 0x8000000000000012 which is "yield" */
- li r4,0 /* "yield timed" */
- li r5,-1 /* "yield forever" */
-#endif /* CONFIG_SMP */
- li r0,-1 /* r0=-1 indicates a Hypervisor call */
- sc /* Invoke the hypervisor via a system call */
- mfspr r13,SPRN_SPRG3 /* Put r13 back ???? */
- b 1b /* If SMP not configured, secondaries
- * loop forever */
-
- .globl decrementer_iSeries_masked
-decrementer_iSeries_masked:
- li r11,1
- stb r11,PACALPPACA+LPPACADECRINT(r13)
- lwz r12,PACADEFAULTDECR(r13)
- mtspr SPRN_DEC,r12
- /* fall through */
-
- .globl hardware_interrupt_iSeries_masked
-hardware_interrupt_iSeries_masked:
- mtcrf 0x80,r9 /* Restore regs */
- ld r11,PACALPPACA+LPPACASRR0(r13)
- ld r12,PACALPPACA+LPPACASRR1(r13)
- mtspr SPRN_SRR0,r11
- mtspr SPRN_SRR1,r12
- ld r9,PACA_EXGEN+EX_R9(r13)
- ld r10,PACA_EXGEN+EX_R10(r13)
- ld r11,PACA_EXGEN+EX_R11(r13)
- ld r12,PACA_EXGEN+EX_R12(r13)
- ld r13,PACA_EXGEN+EX_R13(r13)
- rfid
- b . /* prevent speculative execution */
-#endif /* CONFIG_PPC_ISERIES */
-
-/*** Common interrupt handlers ***/
-
- STD_EXCEPTION_COMMON(0x100, system_reset, .system_reset_exception)
-
- /*
- * Machine check is different because we use a different
- * save area: PACA_EXMC instead of PACA_EXGEN.
- */
- .align 7
- .globl machine_check_common
-machine_check_common:
- EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC)
- DISABLE_INTS
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- bl .machine_check_exception
- b .ret_from_except
-
- STD_EXCEPTION_COMMON_LITE(0x900, decrementer, .timer_interrupt)
- STD_EXCEPTION_COMMON(0xa00, trap_0a, .unknown_exception)
- STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception)
- STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception)
- STD_EXCEPTION_COMMON(0xe00, trap_0e, .unknown_exception)
- STD_EXCEPTION_COMMON(0xf00, performance_monitor, .performance_monitor_exception)
- STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, .instruction_breakpoint_exception)
-#ifdef CONFIG_ALTIVEC
- STD_EXCEPTION_COMMON(0x1700, altivec_assist, .altivec_assist_exception)
-#else
- STD_EXCEPTION_COMMON(0x1700, altivec_assist, .unknown_exception)
-#endif
-
-/*
- * Here we have detected that the kernel stack pointer is bad.
- * R9 contains the saved CR, r13 points to the paca,
- * r10 contains the (bad) kernel stack pointer,
- * r11 and r12 contain the saved SRR0 and SRR1.
- * We switch to using an emergency stack, save the registers there,
- * and call kernel_bad_stack(), which panics.
- */
-bad_stack:
- ld r1,PACAEMERGSP(r13)
- subi r1,r1,64+INT_FRAME_SIZE
- std r9,_CCR(r1)
- std r10,GPR1(r1)
- std r11,_NIP(r1)
- std r12,_MSR(r1)
- mfspr r11,SPRN_DAR
- mfspr r12,SPRN_DSISR
- std r11,_DAR(r1)
- std r12,_DSISR(r1)
- mflr r10
- mfctr r11
- mfxer r12
- std r10,_LINK(r1)
- std r11,_CTR(r1)
- std r12,_XER(r1)
- SAVE_GPR(0,r1)
- SAVE_GPR(2,r1)
- SAVE_4GPRS(3,r1)
- SAVE_2GPRS(7,r1)
- SAVE_10GPRS(12,r1)
- SAVE_10GPRS(22,r1)
- addi r11,r1,INT_FRAME_SIZE
- std r11,0(r1)
- li r12,0
- std r12,0(r11)
- ld r2,PACATOC(r13)
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .kernel_bad_stack
- b 1b
-
-/*
- * Return from an exception with minimal checks.
- * The caller is assumed to have done EXCEPTION_PROLOG_COMMON.
- * If interrupts have been enabled, or anything has been
- * done that might have changed the scheduling status of
- * any task or sent any task a signal, you should use
- * ret_from_except or ret_from_except_lite instead of this.
- */
- .globl fast_exception_return
-fast_exception_return:
- ld r12,_MSR(r1)
- ld r11,_NIP(r1)
- andi. r3,r12,MSR_RI /* check if RI is set */
- beq- unrecov_fer
- ld r3,_CCR(r1)
- ld r4,_LINK(r1)
- ld r5,_CTR(r1)
- ld r6,_XER(r1)
- mtcr r3
- mtlr r4
- mtctr r5
- mtxer r6
- REST_GPR(0, r1)
- REST_8GPRS(2, r1)
-
- mfmsr r10
- clrrdi r10,r10,2 /* clear RI (LE is 0 already) */
- mtmsrd r10,1
-
- mtspr SPRN_SRR1,r12
- mtspr SPRN_SRR0,r11
- REST_4GPRS(10, r1)
- ld r1,GPR1(r1)
- rfid
- b . /* prevent speculative execution */
-
-unrecov_fer:
- bl .save_nvgprs
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .unrecoverable_exception
- b 1b
-
-/*
- * Here r13 points to the paca, r9 contains the saved CR,
- * SRR0 and SRR1 are saved in r11 and r12,
- * r9 - r13 are saved in paca->exgen.
- */
- .align 7
- .globl data_access_common
-data_access_common:
- RUNLATCH_ON(r10) /* It wont fit in the 0x300 handler */
- mfspr r10,SPRN_DAR
- std r10,PACA_EXGEN+EX_DAR(r13)
- mfspr r10,SPRN_DSISR
- stw r10,PACA_EXGEN+EX_DSISR(r13)
- EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN)
- ld r3,PACA_EXGEN+EX_DAR(r13)
- lwz r4,PACA_EXGEN+EX_DSISR(r13)
- li r5,0x300
- b .do_hash_page /* Try to handle as hpte fault */
-
- .align 7
- .globl instruction_access_common
-instruction_access_common:
- EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN)
- ld r3,_NIP(r1)
- andis. r4,r12,0x5820
- li r5,0x400
- b .do_hash_page /* Try to handle as hpte fault */
-
-/*
- * Here is the common SLB miss user that is used when going to virtual
- * mode for SLB misses, that is currently not used
- */
-#ifdef __DISABLED__
- .align 7
- .globl slb_miss_user_common
-slb_miss_user_common:
- mflr r10
- std r3,PACA_EXGEN+EX_DAR(r13)
- stw r9,PACA_EXGEN+EX_CCR(r13)
- std r10,PACA_EXGEN+EX_LR(r13)
- std r11,PACA_EXGEN+EX_SRR0(r13)
- bl .slb_allocate_user
-
- ld r10,PACA_EXGEN+EX_LR(r13)
- ld r3,PACA_EXGEN+EX_R3(r13)
- lwz r9,PACA_EXGEN+EX_CCR(r13)
- ld r11,PACA_EXGEN+EX_SRR0(r13)
- mtlr r10
- beq- slb_miss_fault
-
- andi. r10,r12,MSR_RI /* check for unrecoverable exception */
- beq- unrecov_user_slb
- mfmsr r10
-
-.machine push
-.machine "power4"
- mtcrf 0x80,r9
-.machine pop
-
- clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */
- mtmsrd r10,1
-
- mtspr SRR0,r11
- mtspr SRR1,r12
-
- ld r9,PACA_EXGEN+EX_R9(r13)
- ld r10,PACA_EXGEN+EX_R10(r13)
- ld r11,PACA_EXGEN+EX_R11(r13)
- ld r12,PACA_EXGEN+EX_R12(r13)
- ld r13,PACA_EXGEN+EX_R13(r13)
- rfid
- b .
-
-slb_miss_fault:
- EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN)
- ld r4,PACA_EXGEN+EX_DAR(r13)
- li r5,0
- std r4,_DAR(r1)
- std r5,_DSISR(r1)
- b .handle_page_fault
-
-unrecov_user_slb:
- EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN)
- DISABLE_INTS
- bl .save_nvgprs
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .unrecoverable_exception
- b 1b
-
-#endif /* __DISABLED__ */
-
-
-/*
- * r13 points to the PACA, r9 contains the saved CR,
- * r12 contain the saved SRR1, SRR0 is still ready for return
- * r3 has the faulting address
- * r9 - r13 are saved in paca->exslb.
- * r3 is saved in paca->slb_r3
- * We assume we aren't going to take any exceptions during this procedure.
- */
-_GLOBAL(slb_miss_realmode)
- mflr r10
-
- stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
- std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
-
- bl .slb_allocate_realmode
-
- /* All done -- return from exception. */
-
- ld r10,PACA_EXSLB+EX_LR(r13)
- ld r3,PACA_EXSLB+EX_R3(r13)
- lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
-#ifdef CONFIG_PPC_ISERIES
- ld r11,PACALPPACA+LPPACASRR0(r13) /* get SRR0 value */
-#endif /* CONFIG_PPC_ISERIES */
-
- mtlr r10
-
- andi. r10,r12,MSR_RI /* check for unrecoverable exception */
- beq- unrecov_slb
-
-.machine push
-.machine "power4"
- mtcrf 0x80,r9
- mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */
-.machine pop
-
-#ifdef CONFIG_PPC_ISERIES
- mtspr SPRN_SRR0,r11
- mtspr SPRN_SRR1,r12
-#endif /* CONFIG_PPC_ISERIES */
- ld r9,PACA_EXSLB+EX_R9(r13)
- ld r10,PACA_EXSLB+EX_R10(r13)
- ld r11,PACA_EXSLB+EX_R11(r13)
- ld r12,PACA_EXSLB+EX_R12(r13)
- ld r13,PACA_EXSLB+EX_R13(r13)
- rfid
- b . /* prevent speculative execution */
-
-unrecov_slb:
- EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
- DISABLE_INTS
- bl .save_nvgprs
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .unrecoverable_exception
- b 1b
-
- .align 7
- .globl hardware_interrupt_common
- .globl hardware_interrupt_entry
-hardware_interrupt_common:
- EXCEPTION_PROLOG_COMMON(0x500, PACA_EXGEN)
-hardware_interrupt_entry:
- DISABLE_INTS
- addi r3,r1,STACK_FRAME_OVERHEAD
- bl .do_IRQ
- b .ret_from_except_lite
-
- .align 7
- .globl alignment_common
-alignment_common:
- mfspr r10,SPRN_DAR
- std r10,PACA_EXGEN+EX_DAR(r13)
- mfspr r10,SPRN_DSISR
- stw r10,PACA_EXGEN+EX_DSISR(r13)
- EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN)
- ld r3,PACA_EXGEN+EX_DAR(r13)
- lwz r4,PACA_EXGEN+EX_DSISR(r13)
- std r3,_DAR(r1)
- std r4,_DSISR(r1)
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- ENABLE_INTS
- bl .alignment_exception
- b .ret_from_except
-
- .align 7
- .globl program_check_common
-program_check_common:
- EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN)
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- ENABLE_INTS
- bl .program_check_exception
- b .ret_from_except
-
- .align 7
- .globl fp_unavailable_common
-fp_unavailable_common:
- EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN)
- bne .load_up_fpu /* if from user, just load it up */
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- ENABLE_INTS
- bl .kernel_fp_unavailable_exception
- BUG_OPCODE
-
- .align 7
- .globl altivec_unavailable_common
-altivec_unavailable_common:
- EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN)
-#ifdef CONFIG_ALTIVEC
-BEGIN_FTR_SECTION
- bne .load_up_altivec /* if from user, just load it up */
-END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
-#endif
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- ENABLE_INTS
- bl .altivec_unavailable_exception
- b .ret_from_except
-
-#ifdef CONFIG_ALTIVEC
-/*
- * load_up_altivec(unused, unused, tsk)
- * Disable VMX for the task which had it previously,
- * and save its vector registers in its thread_struct.
- * Enables the VMX for use in the kernel on return.
- * On SMP we know the VMX is free, since we give it up every
- * switch (ie, no lazy save of the vector registers).
- * On entry: r13 == 'current' && last_task_used_altivec != 'current'
- */
-_STATIC(load_up_altivec)
- mfmsr r5 /* grab the current MSR */
- oris r5,r5,MSR_VEC@h
- mtmsrd r5 /* enable use of VMX now */
- isync
-
-/*
- * For SMP, we don't do lazy VMX switching because it just gets too
- * horrendously complex, especially when a task switches from one CPU
- * to another. Instead we call giveup_altvec in switch_to.
- * VRSAVE isn't dealt with here, that is done in the normal context
- * switch code. Note that we could rely on vrsave value to eventually
- * avoid saving all of the VREGs here...
- */
-#ifndef CONFIG_SMP
- ld r3,last_task_used_altivec@got(r2)
- ld r4,0(r3)
- cmpdi 0,r4,0
- beq 1f
- /* Save VMX state to last_task_used_altivec's THREAD struct */
- addi r4,r4,THREAD
- SAVE_32VRS(0,r5,r4)
- mfvscr vr0
- li r10,THREAD_VSCR
- stvx vr0,r10,r4
- /* Disable VMX for last_task_used_altivec */
- ld r5,PT_REGS(r4)
- ld r4,_MSR-STACK_FRAME_OVERHEAD(r5)
- lis r6,MSR_VEC@h
- andc r4,r4,r6
- std r4,_MSR-STACK_FRAME_OVERHEAD(r5)
-1:
-#endif /* CONFIG_SMP */
- /* Hack: if we get an altivec unavailable trap with VRSAVE
- * set to all zeros, we assume this is a broken application
- * that fails to set it properly, and thus we switch it to
- * all 1's
- */
- mfspr r4,SPRN_VRSAVE
- cmpdi 0,r4,0
- bne+ 1f
- li r4,-1
- mtspr SPRN_VRSAVE,r4
-1:
- /* enable use of VMX after return */
- ld r4,PACACURRENT(r13)
- addi r5,r4,THREAD /* Get THREAD */
- oris r12,r12,MSR_VEC@h
- std r12,_MSR(r1)
- li r4,1
- li r10,THREAD_VSCR
- stw r4,THREAD_USED_VR(r5)
- lvx vr0,r10,r5
- mtvscr vr0
- REST_32VRS(0,r4,r5)
-#ifndef CONFIG_SMP
- /* Update last_task_used_math to 'current' */
- subi r4,r5,THREAD /* Back to 'current' */
- std r4,0(r3)
-#endif /* CONFIG_SMP */
- /* restore registers and return */
- b fast_exception_return
-#endif /* CONFIG_ALTIVEC */
-
-/*
- * Hash table stuff
- */
- .align 7
-_GLOBAL(do_hash_page)
- std r3,_DAR(r1)
- std r4,_DSISR(r1)
-
- andis. r0,r4,0xa450 /* weird error? */
- bne- .handle_page_fault /* if not, try to insert a HPTE */
-BEGIN_FTR_SECTION
- andis. r0,r4,0x0020 /* Is it a segment table fault? */
- bne- .do_ste_alloc /* If so handle it */
-END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
-
- /*
- * We need to set the _PAGE_USER bit if MSR_PR is set or if we are
- * accessing a userspace segment (even from the kernel). We assume
- * kernel addresses always have the high bit set.
- */
- rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */
- rotldi r0,r3,15 /* Move high bit into MSR_PR posn */
- orc r0,r12,r0 /* MSR_PR | ~high_bit */
- rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */
- ori r4,r4,1 /* add _PAGE_PRESENT */
- rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */
-
- /*
- * On iSeries, we soft-disable interrupts here, then
- * hard-enable interrupts so that the hash_page code can spin on
- * the hash_table_lock without problems on a shared processor.
- */
- DISABLE_INTS
-
- /*
- * r3 contains the faulting address
- * r4 contains the required access permissions
- * r5 contains the trap number
- *
- * at return r3 = 0 for success
- */
- bl .hash_page /* build HPTE if possible */
- cmpdi r3,0 /* see if hash_page succeeded */
-
-#ifdef DO_SOFT_DISABLE
- /*
- * If we had interrupts soft-enabled at the point where the
- * DSI/ISI occurred, and an interrupt came in during hash_page,
- * handle it now.
- * We jump to ret_from_except_lite rather than fast_exception_return
- * because ret_from_except_lite will check for and handle pending
- * interrupts if necessary.
- */
- beq .ret_from_except_lite
- /* For a hash failure, we don't bother re-enabling interrupts */
- ble- 12f
-
- /*
- * hash_page couldn't handle it, set soft interrupt enable back
- * to what it was before the trap. Note that .local_irq_restore
- * handles any interrupts pending at this point.
- */
- ld r3,SOFTE(r1)
- bl .local_irq_restore
- b 11f
-#else
- beq fast_exception_return /* Return from exception on success */
- ble- 12f /* Failure return from hash_page */
-
- /* fall through */
-#endif
-
-/* Here we have a page fault that hash_page can't handle. */
-_GLOBAL(handle_page_fault)
- ENABLE_INTS
-11: ld r4,_DAR(r1)
- ld r5,_DSISR(r1)
- addi r3,r1,STACK_FRAME_OVERHEAD
- bl .do_page_fault
- cmpdi r3,0
- beq+ .ret_from_except_lite
- bl .save_nvgprs
- mr r5,r3
- addi r3,r1,STACK_FRAME_OVERHEAD
- lwz r4,_DAR(r1)
- bl .bad_page_fault
- b .ret_from_except
-
-/* We have a page fault that hash_page could handle but HV refused
- * the PTE insertion
- */
-12: bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- lwz r4,_DAR(r1)
- bl .low_hash_fault
- b .ret_from_except
-
- /* here we have a segment miss */
-_GLOBAL(do_ste_alloc)
- bl .ste_allocate /* try to insert stab entry */
- cmpdi r3,0
- beq+ fast_exception_return
- b .handle_page_fault
-
-/*
- * r13 points to the PACA, r9 contains the saved CR,
- * r11 and r12 contain the saved SRR0 and SRR1.
- * r9 - r13 are saved in paca->exslb.
- * We assume we aren't going to take any exceptions during this procedure.
- * We assume (DAR >> 60) == 0xc.
- */
- .align 7
-_GLOBAL(do_stab_bolted)
- stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
- std r11,PACA_EXSLB+EX_SRR0(r13) /* save SRR0 in exc. frame */
-
- /* Hash to the primary group */
- ld r10,PACASTABVIRT(r13)
- mfspr r11,SPRN_DAR
- srdi r11,r11,28
- rldimi r10,r11,7,52 /* r10 = first ste of the group */
-
- /* Calculate VSID */
- /* This is a kernel address, so protovsid = ESID */
- ASM_VSID_SCRAMBLE(r11, r9)
- rldic r9,r11,12,16 /* r9 = vsid << 12 */
-
- /* Search the primary group for a free entry */
-1: ld r11,0(r10) /* Test valid bit of the current ste */
- andi. r11,r11,0x80
- beq 2f
- addi r10,r10,16
- andi. r11,r10,0x70
- bne 1b
-
- /* Stick for only searching the primary group for now. */
- /* At least for now, we use a very simple random castout scheme */
- /* Use the TB as a random number ; OR in 1 to avoid entry 0 */
- mftb r11
- rldic r11,r11,4,57 /* r11 = (r11 << 4) & 0x70 */
- ori r11,r11,0x10
-
- /* r10 currently points to an ste one past the group of interest */
- /* make it point to the randomly selected entry */
- subi r10,r10,128
- or r10,r10,r11 /* r10 is the entry to invalidate */
-
- isync /* mark the entry invalid */
- ld r11,0(r10)
- rldicl r11,r11,56,1 /* clear the valid bit */
- rotldi r11,r11,8
- std r11,0(r10)
- sync
-
- clrrdi r11,r11,28 /* Get the esid part of the ste */
- slbie r11
-
-2: std r9,8(r10) /* Store the vsid part of the ste */
- eieio
-
- mfspr r11,SPRN_DAR /* Get the new esid */
- clrrdi r11,r11,28 /* Permits a full 32b of ESID */
- ori r11,r11,0x90 /* Turn on valid and kp */
- std r11,0(r10) /* Put new entry back into the stab */
-
- sync
-
- /* All done -- return from exception. */
- lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
- ld r11,PACA_EXSLB+EX_SRR0(r13) /* get saved SRR0 */
-
- andi. r10,r12,MSR_RI
- beq- unrecov_slb
-
- mtcrf 0x80,r9 /* restore CR */
-
- mfmsr r10
- clrrdi r10,r10,2
- mtmsrd r10,1
-
- mtspr SPRN_SRR0,r11
- mtspr SPRN_SRR1,r12
- ld r9,PACA_EXSLB+EX_R9(r13)
- ld r10,PACA_EXSLB+EX_R10(r13)
- ld r11,PACA_EXSLB+EX_R11(r13)
- ld r12,PACA_EXSLB+EX_R12(r13)
- ld r13,PACA_EXSLB+EX_R13(r13)
- rfid
- b . /* prevent speculative execution */
-
-/*
- * Space for CPU0's segment table.
- *
- * On iSeries, the hypervisor must fill in at least one entry before
- * we get control (with relocate on). The address is give to the hv
- * as a page number (see xLparMap in lpardata.c), so this must be at a
- * fixed address (the linker can't compute (u64)&initial_stab >>
- * PAGE_SHIFT).
- */
- . = STAB0_PHYS_ADDR /* 0x6000 */
- .globl initial_stab
-initial_stab:
- .space 4096
-
-/*
- * Data area reserved for FWNMI option.
- * This address (0x7000) is fixed by the RPA.
- */
- .= 0x7000
- .globl fwnmi_data_area
-fwnmi_data_area:
-
- /* iSeries does not use the FWNMI stuff, so it is safe to put
- * this here, even if we later allow kernels that will boot on
- * both pSeries and iSeries */
-#ifdef CONFIG_PPC_ISERIES
- . = LPARMAP_PHYS
-#include "lparmap.s"
-/*
- * This ".text" is here for old compilers that generate a trailing
- * .note section when compiling .c files to .s
- */
- .text
-#endif /* CONFIG_PPC_ISERIES */
-
- . = 0x8000
-
-/*
- * On pSeries, secondary processors spin in the following code.
- * At entry, r3 = this processor's number (physical cpu id)
- */
-_GLOBAL(pSeries_secondary_smp_init)
- mr r24,r3
-
- /* turn on 64-bit mode */
- bl .enable_64b_mode
- isync
-
- /* Copy some CPU settings from CPU 0 */
- bl .__restore_cpu_setup
-
- /* Set up a paca value for this processor. Since we have the
- * physical cpu id in r24, we need to search the pacas to find
- * which logical id maps to our physical one.
- */
- LOADADDR(r13, paca) /* Get base vaddr of paca array */
- li r5,0 /* logical cpu id */
-1: lhz r6,PACAHWCPUID(r13) /* Load HW procid from paca */
- cmpw r6,r24 /* Compare to our id */
- beq 2f
- addi r13,r13,PACA_SIZE /* Loop to next PACA on miss */
- addi r5,r5,1
- cmpwi r5,NR_CPUS
- blt 1b
-
- mr r3,r24 /* not found, copy phys to r3 */
- b .kexec_wait /* next kernel might do better */
-
-2: mtspr SPRN_SPRG3,r13 /* Save vaddr of paca in SPRG3 */
- /* From now on, r24 is expected to be logical cpuid */
- mr r24,r5
-3: HMT_LOW
- lbz r23,PACAPROCSTART(r13) /* Test if this processor should */
- /* start. */
- sync
-
- /* Create a temp kernel stack for use before relocation is on. */
- ld r1,PACAEMERGSP(r13)
- subi r1,r1,STACK_FRAME_OVERHEAD
-
- cmpwi 0,r23,0
-#ifdef CONFIG_SMP
- bne .__secondary_start
-#endif
- b 3b /* Loop until told to go */
-
-#ifdef CONFIG_PPC_ISERIES
-_STATIC(__start_initialization_iSeries)
- /* Clear out the BSS */
- LOADADDR(r11,__bss_stop)
- LOADADDR(r8,__bss_start)
- sub r11,r11,r8 /* bss size */
- addi r11,r11,7 /* round up to an even double word */
- rldicl. r11,r11,61,3 /* shift right by 3 */
- beq 4f
- addi r8,r8,-8
- li r0,0
- mtctr r11 /* zero this many doublewords */
-3: stdu r0,8(r8)
- bdnz 3b
-4:
- LOADADDR(r1,init_thread_union)
- addi r1,r1,THREAD_SIZE
- li r0,0
- stdu r0,-STACK_FRAME_OVERHEAD(r1)
-
- LOADADDR(r3,cpu_specs)
- LOADADDR(r4,cur_cpu_spec)
- li r5,0
- bl .identify_cpu
-
- LOADADDR(r2,__toc_start)
- addi r2,r2,0x4000
- addi r2,r2,0x4000
-
- bl .iSeries_early_setup
- bl .early_setup
-
- /* relocation is on at this point */
-
- b .start_here_common
-#endif /* CONFIG_PPC_ISERIES */
-
-#ifdef CONFIG_PPC_MULTIPLATFORM
-
-_STATIC(__mmu_off)
- mfmsr r3
- andi. r0,r3,MSR_IR|MSR_DR
- beqlr
- andc r3,r3,r0
- mtspr SPRN_SRR0,r4
- mtspr SPRN_SRR1,r3
- sync
- rfid
- b . /* prevent speculative execution */
-
-
-/*
- * Here is our main kernel entry point. We support currently 2 kind of entries
- * depending on the value of r5.
- *
- * r5 != NULL -> OF entry, we go to prom_init, "legacy" parameter content
- * in r3...r7
- *
- * r5 == NULL -> kexec style entry. r3 is a physical pointer to the
- * DT block, r4 is a physical pointer to the kernel itself
- *
- */
-_GLOBAL(__start_initialization_multiplatform)
- /*
- * Are we booted from a PROM Of-type client-interface ?
- */
- cmpldi cr0,r5,0
- bne .__boot_from_prom /* yes -> prom */
-
- /* Save parameters */
- mr r31,r3
- mr r30,r4
-
- /* Make sure we are running in 64 bits mode */
- bl .enable_64b_mode
-
- /* Setup some critical 970 SPRs before switching MMU off */
- bl .__970_cpu_preinit
-
- /* cpu # */
- li r24,0
-
- /* Switch off MMU if not already */
- LOADADDR(r4, .__after_prom_start - KERNELBASE)
- add r4,r4,r30
- bl .__mmu_off
- b .__after_prom_start
-
-_STATIC(__boot_from_prom)
- /* Save parameters */
- mr r31,r3
- mr r30,r4
- mr r29,r5
- mr r28,r6
- mr r27,r7
-
- /* Make sure we are running in 64 bits mode */
- bl .enable_64b_mode
-
- /* put a relocation offset into r3 */
- bl .reloc_offset
-
- LOADADDR(r2,__toc_start)
- addi r2,r2,0x4000
- addi r2,r2,0x4000
-
- /* Relocate the TOC from a virt addr to a real addr */
- sub r2,r2,r3
-
- /* Restore parameters */
- mr r3,r31
- mr r4,r30
- mr r5,r29
- mr r6,r28
- mr r7,r27
-
- /* Do all of the interaction with OF client interface */
- bl .prom_init
- /* We never return */
- trap
-
-/*
- * At this point, r3 contains the physical address we are running at,
- * returned by prom_init()
- */
-_STATIC(__after_prom_start)
-
-/*
- * We need to run with __start at physical address 0.
- * This will leave some code in the first 256B of
- * real memory, which are reserved for software use.
- * The remainder of the first page is loaded with the fixed
- * interrupt vectors. The next two pages are filled with
- * unknown exception placeholders.
- *
- * Note: This process overwrites the OF exception vectors.
- * r26 == relocation offset
- * r27 == KERNELBASE
- */
- bl .reloc_offset
- mr r26,r3
- SET_REG_TO_CONST(r27,KERNELBASE)
-
- li r3,0 /* target addr */
-
- // XXX FIXME: Use phys returned by OF (r30)
- sub r4,r27,r26 /* source addr */
- /* current address of _start */
- /* i.e. where we are running */
- /* the source addr */
-
- LOADADDR(r5,copy_to_here) /* # bytes of memory to copy */
- sub r5,r5,r27
-
- li r6,0x100 /* Start offset, the first 0x100 */
- /* bytes were copied earlier. */
-
- bl .copy_and_flush /* copy the first n bytes */
- /* this includes the code being */
- /* executed here. */
-
- LOADADDR(r0, 4f) /* Jump to the copy of this code */
- mtctr r0 /* that we just made/relocated */
- bctr
-
-4: LOADADDR(r5,klimit)
- sub r5,r5,r26
- ld r5,0(r5) /* get the value of klimit */
- sub r5,r5,r27
- bl .copy_and_flush /* copy the rest */
- b .start_here_multiplatform
-
-#endif /* CONFIG_PPC_MULTIPLATFORM */
-
-/*
- * Copy routine used to copy the kernel to start at physical address 0
- * and flush and invalidate the caches as needed.
- * r3 = dest addr, r4 = source addr, r5 = copy limit, r6 = start offset
- * on exit, r3, r4, r5 are unchanged, r6 is updated to be >= r5.
- *
- * Note: this routine *only* clobbers r0, r6 and lr
- */
-_GLOBAL(copy_and_flush)
- addi r5,r5,-8
- addi r6,r6,-8
-4: li r0,16 /* Use the least common */
- /* denominator cache line */
- /* size. This results in */
- /* extra cache line flushes */
- /* but operation is correct. */
- /* Can't get cache line size */
- /* from NACA as it is being */
- /* moved too. */
-
- mtctr r0 /* put # words/line in ctr */
-3: addi r6,r6,8 /* copy a cache line */
- ldx r0,r6,r4
- stdx r0,r6,r3
- bdnz 3b
- dcbst r6,r3 /* write it to memory */
- sync
- icbi r6,r3 /* flush the icache line */
- cmpld 0,r6,r5
- blt 4b
- sync
- addi r5,r5,8
- addi r6,r6,8
- blr
-
-.align 8
-copy_to_here:
-
-#ifdef CONFIG_SMP
-#ifdef CONFIG_PPC_PMAC
-/*
- * On PowerMac, secondary processors starts from the reset vector, which
- * is temporarily turned into a call to one of the functions below.
- */
- .section ".text";
- .align 2 ;
-
- .globl __secondary_start_pmac_0
-__secondary_start_pmac_0:
- /* NB the entries for cpus 0, 1, 2 must each occupy 8 bytes. */
- li r24,0
- b 1f
- li r24,1
- b 1f
- li r24,2
- b 1f
- li r24,3
-1:
-
-_GLOBAL(pmac_secondary_start)
- /* turn on 64-bit mode */
- bl .enable_64b_mode
- isync
-
- /* Copy some CPU settings from CPU 0 */
- bl .__restore_cpu_setup
-
- /* pSeries do that early though I don't think we really need it */
- mfmsr r3
- ori r3,r3,MSR_RI
- mtmsrd r3 /* RI on */
-
- /* Set up a paca value for this processor. */
- LOADADDR(r4, paca) /* Get base vaddr of paca array */
- mulli r13,r24,PACA_SIZE /* Calculate vaddr of right paca */
- add r13,r13,r4 /* for this processor. */
- mtspr SPRN_SPRG3,r13 /* Save vaddr of paca in SPRG3 */
-
- /* Create a temp kernel stack for use before relocation is on. */
- ld r1,PACAEMERGSP(r13)
- subi r1,r1,STACK_FRAME_OVERHEAD
-
- b .__secondary_start
-
-#endif /* CONFIG_PPC_PMAC */
-
-/*
- * This function is called after the master CPU has released the
- * secondary processors. The execution environment is relocation off.
- * The paca for this processor has the following fields initialized at
- * this point:
- * 1. Processor number
- * 2. Segment table pointer (virtual address)
- * On entry the following are set:
- * r1 = stack pointer. vaddr for iSeries, raddr (temp stack) for pSeries
- * r24 = cpu# (in Linux terms)
- * r13 = paca virtual address
- * SPRG3 = paca virtual address
- */
-_GLOBAL(__secondary_start)
-
- HMT_MEDIUM /* Set thread priority to MEDIUM */
-
- ld r2,PACATOC(r13)
-
- /* Do early setup for that CPU */
- bl .early_setup_secondary
-
- /* Initialize the kernel stack. Just a repeat for iSeries. */
- LOADADDR(r3,current_set)
- sldi r28,r24,3 /* get current_set[cpu#] */
- ldx r1,r3,r28
- addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
- std r1,PACAKSAVE(r13)
-
- li r7,0
- mtlr r7
-
- /* enable MMU and jump to start_secondary */
- LOADADDR(r3,.start_secondary_prolog)
- SET_REG_TO_CONST(r4, MSR_KERNEL)
-#ifdef DO_SOFT_DISABLE
- ori r4,r4,MSR_EE
-#endif
- mtspr SPRN_SRR0,r3
- mtspr SPRN_SRR1,r4
- rfid
- b . /* prevent speculative execution */
-
-/*
- * Running with relocation on at this point. All we want to do is
- * zero the stack back-chain pointer before going into C code.
- */
-_GLOBAL(start_secondary_prolog)
- li r3,0
- std r3,0(r1) /* Zero the stack frame pointer */
- bl .start_secondary
-#endif
-
-/*
- * This subroutine clobbers r11 and r12
- */
-_GLOBAL(enable_64b_mode)
- mfmsr r11 /* grab the current MSR */
- li r12,1
- rldicr r12,r12,MSR_SF_LG,(63-MSR_SF_LG)
- or r11,r11,r12
- li r12,1
- rldicr r12,r12,MSR_ISF_LG,(63-MSR_ISF_LG)
- or r11,r11,r12
- mtmsrd r11
- isync
- blr
-
-#ifdef CONFIG_PPC_MULTIPLATFORM
-/*
- * This is where the main kernel code starts.
- */
-_STATIC(start_here_multiplatform)
- /* get a new offset, now that the kernel has moved. */
- bl .reloc_offset
- mr r26,r3
-
- /* Clear out the BSS. It may have been done in prom_init,
- * already but that's irrelevant since prom_init will soon
- * be detached from the kernel completely. Besides, we need
- * to clear it now for kexec-style entry.
- */
- LOADADDR(r11,__bss_stop)
- LOADADDR(r8,__bss_start)
- sub r11,r11,r8 /* bss size */
- addi r11,r11,7 /* round up to an even double word */
- rldicl. r11,r11,61,3 /* shift right by 3 */
- beq 4f
- addi r8,r8,-8
- li r0,0
- mtctr r11 /* zero this many doublewords */
-3: stdu r0,8(r8)
- bdnz 3b
-4:
-
- mfmsr r6
- ori r6,r6,MSR_RI
- mtmsrd r6 /* RI on */
-
-#ifdef CONFIG_HMT
- /* Start up the second thread on cpu 0 */
- mfspr r3,SPRN_PVR
- srwi r3,r3,16
- cmpwi r3,0x34 /* Pulsar */
- beq 90f
- cmpwi r3,0x36 /* Icestar */
- beq 90f
- cmpwi r3,0x37 /* SStar */
- beq 90f
- b 91f /* HMT not supported */
-90: li r3,0
- bl .hmt_start_secondary
-91:
-#endif
-
- /* The following gets the stack and TOC set up with the regs */
- /* pointing to the real addr of the kernel stack. This is */
- /* all done to support the C function call below which sets */
- /* up the htab. This is done because we have relocated the */
- /* kernel but are still running in real mode. */
-
- LOADADDR(r3,init_thread_union)
- sub r3,r3,r26
-
- /* set up a stack pointer (physical address) */
- addi r1,r3,THREAD_SIZE
- li r0,0
- stdu r0,-STACK_FRAME_OVERHEAD(r1)
-
- /* set up the TOC (physical address) */
- LOADADDR(r2,__toc_start)
- addi r2,r2,0x4000
- addi r2,r2,0x4000
- sub r2,r2,r26
-
- LOADADDR(r3,cpu_specs)
- sub r3,r3,r26
- LOADADDR(r4,cur_cpu_spec)
- sub r4,r4,r26
- mr r5,r26
- bl .identify_cpu
-
- /* Save some low level config HIDs of CPU0 to be copied to
- * other CPUs later on, or used for suspend/resume
- */
- bl .__save_cpu_setup
- sync
-
- /* Setup a valid physical PACA pointer in SPRG3 for early_setup
- * note that boot_cpuid can always be 0 nowadays since there is
- * nowhere it can be initialized differently before we reach this
- * code
- */
- LOADADDR(r27, boot_cpuid)
- sub r27,r27,r26
- lwz r27,0(r27)
-
- LOADADDR(r24, paca) /* Get base vaddr of paca array */
- mulli r13,r27,PACA_SIZE /* Calculate vaddr of right paca */
- add r13,r13,r24 /* for this processor. */
- sub r13,r13,r26 /* convert to physical addr */
- mtspr SPRN_SPRG3,r13 /* PPPBBB: Temp... -Peter */
-
- /* Do very early kernel initializations, including initial hash table,
- * stab and slb setup before we turn on relocation. */
-
- /* Restore parameters passed from prom_init/kexec */
- mr r3,r31
- bl .early_setup
-
- LOADADDR(r3,.start_here_common)
- SET_REG_TO_CONST(r4, MSR_KERNEL)
- mtspr SPRN_SRR0,r3
- mtspr SPRN_SRR1,r4
- rfid
- b . /* prevent speculative execution */
-#endif /* CONFIG_PPC_MULTIPLATFORM */
-
- /* This is where all platforms converge execution */
-_STATIC(start_here_common)
- /* relocation is on at this point */
-
- /* The following code sets up the SP and TOC now that we are */
- /* running with translation enabled. */
-
- LOADADDR(r3,init_thread_union)
-
- /* set up the stack */
- addi r1,r3,THREAD_SIZE
- li r0,0
- stdu r0,-STACK_FRAME_OVERHEAD(r1)
-
- /* Apply the CPUs-specific fixups (nop out sections not relevant
- * to this CPU
- */
- li r3,0
- bl .do_cpu_ftr_fixups
-
- LOADADDR(r26, boot_cpuid)
- lwz r26,0(r26)
-
- LOADADDR(r24, paca) /* Get base vaddr of paca array */
- mulli r13,r26,PACA_SIZE /* Calculate vaddr of right paca */
- add r13,r13,r24 /* for this processor. */
- mtspr SPRN_SPRG3,r13
-
- /* ptr to current */
- LOADADDR(r4,init_task)
- std r4,PACACURRENT(r13)
-
- /* Load the TOC */
- ld r2,PACATOC(r13)
- std r1,PACAKSAVE(r13)
-
- bl .setup_system
-
- /* Load up the kernel context */
-5:
-#ifdef DO_SOFT_DISABLE
- li r5,0
- stb r5,PACAPROCENABLED(r13) /* Soft Disabled */
- mfmsr r5
- ori r5,r5,MSR_EE /* Hard Enabled */
- mtmsrd r5
-#endif
-
- bl .start_kernel
-
-_GLOBAL(hmt_init)
-#ifdef CONFIG_HMT
- LOADADDR(r5, hmt_thread_data)
- mfspr r7,SPRN_PVR
- srwi r7,r7,16
- cmpwi r7,0x34 /* Pulsar */
- beq 90f
- cmpwi r7,0x36 /* Icestar */
- beq 91f
- cmpwi r7,0x37 /* SStar */
- beq 91f
- b 101f
-90: mfspr r6,SPRN_PIR
- andi. r6,r6,0x1f
- b 92f
-91: mfspr r6,SPRN_PIR
- andi. r6,r6,0x3ff
-92: sldi r4,r24,3
- stwx r6,r5,r4
- bl .hmt_start_secondary
- b 101f
-
-__hmt_secondary_hold:
- LOADADDR(r5, hmt_thread_data)
- clrldi r5,r5,4
- li r7,0
- mfspr r6,SPRN_PIR
- mfspr r8,SPRN_PVR
- srwi r8,r8,16
- cmpwi r8,0x34
- bne 93f
- andi. r6,r6,0x1f
- b 103f
-93: andi. r6,r6,0x3f
-
-103: lwzx r8,r5,r7
- cmpw r8,r6
- beq 104f
- addi r7,r7,8
- b 103b
-
-104: addi r7,r7,4
- lwzx r9,r5,r7
- mr r24,r9
-101:
-#endif
- mr r3,r24
- b .pSeries_secondary_smp_init
-
-#ifdef CONFIG_HMT
-_GLOBAL(hmt_start_secondary)
- LOADADDR(r4,__hmt_secondary_hold)
- clrldi r4,r4,4
- mtspr SPRN_NIADORM, r4
- mfspr r4, SPRN_MSRDORM
- li r5, -65
- and r4, r4, r5
- mtspr SPRN_MSRDORM, r4
- lis r4,0xffef
- ori r4,r4,0x7403
- mtspr SPRN_TSC, r4
- li r4,0x1f4
- mtspr SPRN_TST, r4
- mfspr r4, SPRN_HID0
- ori r4, r4, 0x1
- mtspr SPRN_HID0, r4
- mfspr r4, SPRN_CTRLF
- oris r4, r4, 0x40
- mtspr SPRN_CTRLT, r4
- blr
-#endif
-
-/*
- * We put a few things here that have to be page-aligned.
- * This stuff goes at the beginning of the bss, which is page-aligned.
- */
- .section ".bss"
-
- .align PAGE_SHIFT
-
- .globl empty_zero_page
-empty_zero_page:
- .space PAGE_SIZE
-
- .globl swapper_pg_dir
-swapper_pg_dir:
- .space PAGE_SIZE
-
-/*
- * This space gets a copy of optional info passed to us by the bootstrap
- * Used to pass parameters into the kernel like root=/dev/sda1, etc.
- */
- .globl cmd_line
-cmd_line:
- .space COMMAND_LINE_SIZE
+++ /dev/null
-/*
- * arch/ppc/kernel/misc.S
- *
- *
- *
- * This file contains miscellaneous low-level functions.
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
- * and Paul Mackerras.
- * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
- * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- */
-
-#include <linux/config.h>
-#include <linux/sys.h>
-#include <asm/unistd.h>
-#include <asm/errno.h>
-#include <asm/processor.h>
-#include <asm/page.h>
-#include <asm/cache.h>
-#include <asm/ppc_asm.h>
-#include <asm/asm-offsets.h>
-#include <asm/cputable.h>
-#include <asm/thread_info.h>
-
- .text
-
-/*
- * Returns (address we were linked at) - (address we are running at)
- * for use before the text and data are mapped to KERNELBASE.
- */
-
-_GLOBAL(reloc_offset)
- mflr r0
- bl 1f
-1: mflr r3
- LOADADDR(r4,1b)
- sub r3,r4,r3
- mtlr r0
- blr
-
-_GLOBAL(get_msr)
- mfmsr r3
- blr
-
-_GLOBAL(get_dar)
- mfdar r3
- blr
-
-_GLOBAL(get_srr0)
- mfsrr0 r3
- blr
-
-_GLOBAL(get_srr1)
- mfsrr1 r3
- blr
-
-_GLOBAL(get_sp)
- mr r3,r1
- blr
-
-#ifdef CONFIG_IRQSTACKS
-_GLOBAL(call_do_softirq)
- mflr r0
- std r0,16(r1)
- stdu r1,THREAD_SIZE-112(r3)
- mr r1,r3
- bl .__do_softirq
- ld r1,0(r1)
- ld r0,16(r1)
- mtlr r0
- blr
-
-_GLOBAL(call___do_IRQ)
- mflr r0
- std r0,16(r1)
- stdu r1,THREAD_SIZE-112(r5)
- mr r1,r5
- bl .__do_IRQ
- ld r1,0(r1)
- ld r0,16(r1)
- mtlr r0
- blr
-#endif /* CONFIG_IRQSTACKS */
-
- /*
- * To be called by C code which needs to do some operations with MMU
- * disabled. Note that interrupts have to be disabled by the caller
- * prior to calling us. The code called _MUST_ be in the RMO of course
- * and part of the linear mapping as we don't attempt to translate the
- * stack pointer at all. The function is called with the stack switched
- * to this CPU emergency stack
- *
- * prototype is void *call_with_mmu_off(void *func, void *data);
- *
- * the called function is expected to be of the form
- *
- * void *called(void *data);
- */
-_GLOBAL(call_with_mmu_off)
- mflr r0 /* get link, save it on stackframe */
- std r0,16(r1)
- mr r1,r5 /* save old stack ptr */
- ld r1,PACAEMERGSP(r13) /* get emerg. stack */
- subi r1,r1,STACK_FRAME_OVERHEAD
- std r0,16(r1) /* save link on emerg. stack */
- std r5,0(r1) /* save old stack ptr in backchain */
- ld r3,0(r3) /* get to real function ptr (assume same TOC) */
- bl 2f /* we need LR to return, continue at label 2 */
-
- ld r0,16(r1) /* we return here from the call, get LR and */
- ld r1,0(r1) /* .. old stack ptr */
- mtspr SPRN_SRR0,r0 /* and get back to virtual mode with these */
- mfmsr r4
- ori r4,r4,MSR_IR|MSR_DR
- mtspr SPRN_SRR1,r4
- rfid
-
-2: mtspr SPRN_SRR0,r3 /* coming from above, enter real mode */
- mr r3,r4 /* get parameter */
- mfmsr r0
- ori r0,r0,MSR_IR|MSR_DR
- xori r0,r0,MSR_IR|MSR_DR
- mtspr SPRN_SRR1,r0
- rfid
-
-
- .section ".toc","aw"
-PPC64_CACHES:
- .tc ppc64_caches[TC],ppc64_caches
- .section ".text"
-
-/*
- * Write any modified data cache blocks out to memory
- * and invalidate the corresponding instruction cache blocks.
- *
- * flush_icache_range(unsigned long start, unsigned long stop)
- *
- * flush all bytes from start through stop-1 inclusive
- */
-
-_KPROBE(__flush_icache_range)
-
-/*
- * Flush the data cache to memory
- *
- * Different systems have different cache line sizes
- * and in some cases i-cache and d-cache line sizes differ from
- * each other.
- */
- ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10)/* Get cache line size */
- addi r5,r7,-1
- andc r6,r3,r5 /* round low to line bdy */
- subf r8,r6,r4 /* compute length */
- add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10) /* Get log-2 of cache line size */
- srw. r8,r8,r9 /* compute line count */
- beqlr /* nothing to do? */
- mtctr r8
-1: dcbst 0,r6
- add r6,r6,r7
- bdnz 1b
- sync
-
-/* Now invalidate the instruction cache */
-
- lwz r7,ICACHEL1LINESIZE(r10) /* Get Icache line size */
- addi r5,r7,-1
- andc r6,r3,r5 /* round low to line bdy */
- subf r8,r6,r4 /* compute length */
- add r8,r8,r5
- lwz r9,ICACHEL1LOGLINESIZE(r10) /* Get log-2 of Icache line size */
- srw. r8,r8,r9 /* compute line count */
- beqlr /* nothing to do? */
- mtctr r8
-2: icbi 0,r6
- add r6,r6,r7
- bdnz 2b
- isync
- blr
-
- .text
-/*
- * Like above, but only do the D-cache.
- *
- * flush_dcache_range(unsigned long start, unsigned long stop)
- *
- * flush all bytes from start to stop-1 inclusive
- */
-_GLOBAL(flush_dcache_range)
-
-/*
- * Flush the data cache to memory
- *
- * Different systems have different cache line sizes
- */
- ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10) /* Get dcache line size */
- addi r5,r7,-1
- andc r6,r3,r5 /* round low to line bdy */
- subf r8,r6,r4 /* compute length */
- add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10) /* Get log-2 of dcache line size */
- srw. r8,r8,r9 /* compute line count */
- beqlr /* nothing to do? */
- mtctr r8
-0: dcbst 0,r6
- add r6,r6,r7
- bdnz 0b
- sync
- blr
-
-/*
- * Like above, but works on non-mapped physical addresses.
- * Use only for non-LPAR setups ! It also assumes real mode
- * is cacheable. Used for flushing out the DART before using
- * it as uncacheable memory
- *
- * flush_dcache_phys_range(unsigned long start, unsigned long stop)
- *
- * flush all bytes from start to stop-1 inclusive
- */
-_GLOBAL(flush_dcache_phys_range)
- ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10) /* Get dcache line size */
- addi r5,r7,-1
- andc r6,r3,r5 /* round low to line bdy */
- subf r8,r6,r4 /* compute length */
- add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10) /* Get log-2 of dcache line size */
- srw. r8,r8,r9 /* compute line count */
- beqlr /* nothing to do? */
- mfmsr r5 /* Disable MMU Data Relocation */
- ori r0,r5,MSR_DR
- xori r0,r0,MSR_DR
- sync
- mtmsr r0
- sync
- isync
- mtctr r8
-0: dcbst 0,r6
- add r6,r6,r7
- bdnz 0b
- sync
- isync
- mtmsr r5 /* Re-enable MMU Data Relocation */
- sync
- isync
- blr
-
-_GLOBAL(flush_inval_dcache_range)
- ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10) /* Get dcache line size */
- addi r5,r7,-1
- andc r6,r3,r5 /* round low to line bdy */
- subf r8,r6,r4 /* compute length */
- add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10)/* Get log-2 of dcache line size */
- srw. r8,r8,r9 /* compute line count */
- beqlr /* nothing to do? */
- sync
- isync
- mtctr r8
-0: dcbf 0,r6
- add r6,r6,r7
- bdnz 0b
- sync
- isync
- blr
-
-
-/*
- * Flush a particular page from the data cache to RAM.
- * Note: this is necessary because the instruction cache does *not*
- * snoop from the data cache.
- *
- * void __flush_dcache_icache(void *page)
- */
-_GLOBAL(__flush_dcache_icache)
-/*
- * Flush the data cache to memory
- *
- * Different systems have different cache line sizes
- */
-
-/* Flush the dcache */
- ld r7,PPC64_CACHES@toc(r2)
- clrrdi r3,r3,PAGE_SHIFT /* Page align */
- lwz r4,DCACHEL1LINESPERPAGE(r7) /* Get # dcache lines per page */
- lwz r5,DCACHEL1LINESIZE(r7) /* Get dcache line size */
- mr r6,r3
- mtctr r4
-0: dcbst 0,r6
- add r6,r6,r5
- bdnz 0b
- sync
-
-/* Now invalidate the icache */
-
- lwz r4,ICACHEL1LINESPERPAGE(r7) /* Get # icache lines per page */
- lwz r5,ICACHEL1LINESIZE(r7) /* Get icache line size */
- mtctr r4
-1: icbi 0,r3
- add r3,r3,r5
- bdnz 1b
- isync
- blr
-
-/*
- * I/O string operations
- *
- * insb(port, buf, len)
- * outsb(port, buf, len)
- * insw(port, buf, len)
- * outsw(port, buf, len)
- * insl(port, buf, len)
- * outsl(port, buf, len)
- * insw_ns(port, buf, len)
- * outsw_ns(port, buf, len)
- * insl_ns(port, buf, len)
- * outsl_ns(port, buf, len)
- *
- * The *_ns versions don't do byte-swapping.
- */
-_GLOBAL(_insb)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,1
- blelr-
-00: lbz r5,0(r3)
- eieio
- stbu r5,1(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsb)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,1
- blelr-
-00: lbzu r5,1(r4)
- stb r5,0(r3)
- bdnz 00b
- sync
- blr
-
-_GLOBAL(_insw)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhbrx r5,0,r3
- eieio
- sthu r5,2(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsw)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhzu r5,2(r4)
- sthbrx r5,0,r3
- bdnz 00b
- sync
- blr
-
-_GLOBAL(_insl)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwbrx r5,0,r3
- eieio
- stwu r5,4(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsl)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwzu r5,4(r4)
- stwbrx r5,0,r3
- bdnz 00b
- sync
- blr
-
-/* _GLOBAL(ide_insw) now in drivers/ide/ide-iops.c */
-_GLOBAL(_insw_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhz r5,0(r3)
- eieio
- sthu r5,2(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-/* _GLOBAL(ide_outsw) now in drivers/ide/ide-iops.c */
-_GLOBAL(_outsw_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,2
- blelr-
-00: lhzu r5,2(r4)
- sth r5,0(r3)
- bdnz 00b
- sync
- blr
-
-_GLOBAL(_insl_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwz r5,0(r3)
- eieio
- stwu r5,4(r4)
- bdnz 00b
- twi 0,r5,0
- isync
- blr
-
-_GLOBAL(_outsl_ns)
- cmpwi 0,r5,0
- mtctr r5
- subi r4,r4,4
- blelr-
-00: lwzu r5,4(r4)
- stw r5,0(r3)
- bdnz 00b
- sync
- blr
-
-/*
- * identify_cpu and calls setup_cpu
- * In: r3 = base of the cpu_specs array
- * r4 = address of cur_cpu_spec
- * r5 = relocation offset
- */
-_GLOBAL(identify_cpu)
- mfpvr r7
-1:
- lwz r8,CPU_SPEC_PVR_MASK(r3)
- and r8,r8,r7
- lwz r9,CPU_SPEC_PVR_VALUE(r3)
- cmplw 0,r9,r8
- beq 1f
- addi r3,r3,CPU_SPEC_ENTRY_SIZE
- b 1b
-1:
- add r0,r3,r5
- std r0,0(r4)
- ld r4,CPU_SPEC_SETUP(r3)
- sub r4,r4,r5
- ld r4,0(r4)
- sub r4,r4,r5
- mtctr r4
- /* Calling convention for cpu setup is r3=offset, r4=cur_cpu_spec */
- mr r4,r3
- mr r3,r5
- bctr
-
-/*
- * do_cpu_ftr_fixups - goes through the list of CPU feature fixups
- * and writes nop's over sections of code that don't apply for this cpu.
- * r3 = data offset (not changed)
- */
-_GLOBAL(do_cpu_ftr_fixups)
- /* Get CPU 0 features */
- LOADADDR(r6,cur_cpu_spec)
- sub r6,r6,r3
- ld r4,0(r6)
- sub r4,r4,r3
- ld r4,CPU_SPEC_FEATURES(r4)
- /* Get the fixup table */
- LOADADDR(r6,__start___ftr_fixup)
- sub r6,r6,r3
- LOADADDR(r7,__stop___ftr_fixup)
- sub r7,r7,r3
- /* Do the fixup */
-1: cmpld r6,r7
- bgelr
- addi r6,r6,32
- ld r8,-32(r6) /* mask */
- and r8,r8,r4
- ld r9,-24(r6) /* value */
- cmpld r8,r9
- beq 1b
- ld r8,-16(r6) /* section begin */
- ld r9,-8(r6) /* section end */
- subf. r9,r8,r9
- beq 1b
- /* write nops over the section of code */
- /* todo: if large section, add a branch at the start of it */
- srwi r9,r9,2
- mtctr r9
- sub r8,r8,r3
- lis r0,0x60000000@h /* nop */
-3: stw r0,0(r8)
- andi. r10,r4,CPU_FTR_SPLIT_ID_CACHE@l
- beq 2f
- dcbst 0,r8 /* suboptimal, but simpler */
- sync
- icbi 0,r8
-2: addi r8,r8,4
- bdnz 3b
- sync /* additional sync needed on g4 */
- isync
- b 1b
-
-#if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE)
-/*
- * Do an IO access in real mode
- */
-_GLOBAL(real_readb)
- mfmsr r7
- ori r0,r7,MSR_DR
- xori r0,r0,MSR_DR
- sync
- mtmsrd r0
- sync
- isync
- mfspr r6,SPRN_HID4
- rldicl r5,r6,32,0
- ori r5,r5,0x100
- rldicl r5,r5,32,0
- sync
- mtspr SPRN_HID4,r5
- isync
- slbia
- isync
- lbz r3,0(r3)
- sync
- mtspr SPRN_HID4,r6
- isync
- slbia
- isync
- mtmsrd r7
- sync
- isync
- blr
-
-/*
- * Do an IO access in real mode
- */
-_GLOBAL(real_writeb)
- mfmsr r7
- ori r0,r7,MSR_DR
- xori r0,r0,MSR_DR
- sync
- mtmsrd r0
- sync
- isync
- mfspr r6,SPRN_HID4
- rldicl r5,r6,32,0
- ori r5,r5,0x100
- rldicl r5,r5,32,0
- sync
- mtspr SPRN_HID4,r5
- isync
- slbia
- isync
- stb r3,0(r4)
- sync
- mtspr SPRN_HID4,r6
- isync
- slbia
- isync
- mtmsrd r7
- sync
- isync
- blr
-#endif /* defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE) */
-
-/*
- * SCOM access functions for 970 (FX only for now)
- *
- * unsigned long scom970_read(unsigned int address);
- * void scom970_write(unsigned int address, unsigned long value);
- *
- * The address passed in is the 24 bits register address. This code
- * is 970 specific and will not check the status bits, so you should
- * know what you are doing.
- */
-_GLOBAL(scom970_read)
- /* interrupts off */
- mfmsr r4
- ori r0,r4,MSR_EE
- xori r0,r0,MSR_EE
- mtmsrd r0,1
-
- /* rotate 24 bits SCOM address 8 bits left and mask out it's low 8 bits
- * (including parity). On current CPUs they must be 0'd,
- * and finally or in RW bit
- */
- rlwinm r3,r3,8,0,15
- ori r3,r3,0x8000
-
- /* do the actual scom read */
- sync
- mtspr SPRN_SCOMC,r3
- isync
- mfspr r3,SPRN_SCOMD
- isync
- mfspr r0,SPRN_SCOMC
- isync
-
- /* XXX: fixup result on some buggy 970's (ouch ! we lost a bit, bah
- * that's the best we can do). Not implemented yet as we don't use
- * the scom on any of the bogus CPUs yet, but may have to be done
- * ultimately
- */
-
- /* restore interrupts */
- mtmsrd r4,1
- blr
-
-
-_GLOBAL(scom970_write)
- /* interrupts off */
- mfmsr r5
- ori r0,r5,MSR_EE
- xori r0,r0,MSR_EE
- mtmsrd r0,1
-
- /* rotate 24 bits SCOM address 8 bits left and mask out it's low 8 bits
- * (including parity). On current CPUs they must be 0'd.
- */
-
- rlwinm r3,r3,8,0,15
-
- sync
- mtspr SPRN_SCOMD,r4 /* write data */
- isync
- mtspr SPRN_SCOMC,r3 /* write command */
- isync
- mfspr 3,SPRN_SCOMC
- isync
-
- /* restore interrupts */
- mtmsrd r5,1
- blr
-
-
-/*
- * Create a kernel thread
- * kernel_thread(fn, arg, flags)
- */
-_GLOBAL(kernel_thread)
- std r29,-24(r1)
- std r30,-16(r1)
- stdu r1,-STACK_FRAME_OVERHEAD(r1)
- mr r29,r3
- mr r30,r4
- ori r3,r5,CLONE_VM /* flags */
- oris r3,r3,(CLONE_UNTRACED>>16)
- li r4,0 /* new sp (unused) */
- li r0,__NR_clone
- sc
- cmpdi 0,r3,0 /* parent or child? */
- bne 1f /* return if parent */
- li r0,0
- stdu r0,-STACK_FRAME_OVERHEAD(r1)
- ld r2,8(r29)
- ld r29,0(r29)
- mtlr r29 /* fn addr in lr */
- mr r3,r30 /* load arg and call fn */
- blrl
- li r0,__NR_exit /* exit after child exits */
- li r3,0
- sc
-1: addi r1,r1,STACK_FRAME_OVERHEAD
- ld r29,-24(r1)
- ld r30,-16(r1)
- blr
-
-/*
- * disable_kernel_fp()
- * Disable the FPU.
- */
-_GLOBAL(disable_kernel_fp)
- mfmsr r3
- rldicl r0,r3,(63-MSR_FP_LG),1
- rldicl r3,r0,(MSR_FP_LG+1),0
- mtmsrd r3 /* disable use of fpu now */
- isync
- blr
-
-#ifdef CONFIG_ALTIVEC
-
-#if 0 /* this has no callers for now */
-/*
- * disable_kernel_altivec()
- * Disable the VMX.
- */
-_GLOBAL(disable_kernel_altivec)
- mfmsr r3
- rldicl r0,r3,(63-MSR_VEC_LG),1
- rldicl r3,r0,(MSR_VEC_LG+1),0
- mtmsrd r3 /* disable use of VMX now */
- isync
- blr
-#endif /* 0 */
-
-/*
- * giveup_altivec(tsk)
- * Disable VMX for the task given as the argument,
- * and save the vector registers in its thread_struct.
- * Enables the VMX for use in the kernel on return.
- */
-_GLOBAL(giveup_altivec)
- mfmsr r5
- oris r5,r5,MSR_VEC@h
- mtmsrd r5 /* enable use of VMX now */
- isync
- cmpdi 0,r3,0
- beqlr- /* if no previous owner, done */
- addi r3,r3,THREAD /* want THREAD of task */
- ld r5,PT_REGS(r3)
- cmpdi 0,r5,0
- SAVE_32VRS(0,r4,r3)
- mfvscr vr0
- li r4,THREAD_VSCR
- stvx vr0,r4,r3
- beq 1f
- ld r4,_MSR-STACK_FRAME_OVERHEAD(r5)
- lis r3,MSR_VEC@h
- andc r4,r4,r3 /* disable FP for previous task */
- std r4,_MSR-STACK_FRAME_OVERHEAD(r5)
-1:
-#ifndef CONFIG_SMP
- li r5,0
- ld r4,last_task_used_altivec@got(r2)
- std r5,0(r4)
-#endif /* CONFIG_SMP */
- blr
-
-#endif /* CONFIG_ALTIVEC */
-
-_GLOBAL(__setup_cpu_power3)
- blr
-
-_GLOBAL(execve)
- li r0,__NR_execve
- sc
- bnslr
- neg r3,r3
- blr
-
-/* kexec_wait(phys_cpu)
- *
- * wait for the flag to change, indicating this kernel is going away but
- * the slave code for the next one is at addresses 0 to 100.
- *
- * This is used by all slaves.
- *
- * Physical (hardware) cpu id should be in r3.
- */
-_GLOBAL(kexec_wait)
- bl 1f
-1: mflr r5
- addi r5,r5,kexec_flag-1b
-
-99: HMT_LOW
-#ifdef CONFIG_KEXEC /* use no memory without kexec */
- lwz r4,0(r5)
- cmpwi 0,r4,0
- bnea 0x60
-#endif
- b 99b
-
-/* this can be in text because we won't change it until we are
- * running in real anyways
- */
-kexec_flag:
- .long 0
-
-
-#ifdef CONFIG_KEXEC
-
-/* kexec_smp_wait(void)
- *
- * call with interrupts off
- * note: this is a terminal routine, it does not save lr
- *
- * get phys id from paca
- * set paca id to -1 to say we got here
- * switch to real mode
- * join other cpus in kexec_wait(phys_id)
- */
-_GLOBAL(kexec_smp_wait)
- lhz r3,PACAHWCPUID(r13)
- li r4,-1
- sth r4,PACAHWCPUID(r13) /* let others know we left */
- bl real_mode
- b .kexec_wait
-
-/*
- * switch to real mode (turn mmu off)
- * we use the early kernel trick that the hardware ignores bits
- * 0 and 1 (big endian) of the effective address in real mode
- *
- * don't overwrite r3 here, it is live for kexec_wait above.
- */
-real_mode: /* assume normal blr return */
-1: li r9,MSR_RI
- li r10,MSR_DR|MSR_IR
- mflr r11 /* return address to SRR0 */
- mfmsr r12
- andc r9,r12,r9
- andc r10,r12,r10
-
- mtmsrd r9,1
- mtspr SPRN_SRR1,r10
- mtspr SPRN_SRR0,r11
- rfid
-
-
-/*
- * kexec_sequence(newstack, start, image, control, clear_all())
- *
- * does the grungy work with stack switching and real mode switches
- * also does simple calls to other code
- */
-
-_GLOBAL(kexec_sequence)
- mflr r0
- std r0,16(r1)
-
- /* switch stacks to newstack -- &kexec_stack.stack */
- stdu r1,THREAD_SIZE-112(r3)
- mr r1,r3
-
- li r0,0
- std r0,16(r1)
-
- /* save regs for local vars on new stack.
- * yes, we won't go back, but ...
- */
- std r31,-8(r1)
- std r30,-16(r1)
- std r29,-24(r1)
- std r28,-32(r1)
- std r27,-40(r1)
- std r26,-48(r1)
- std r25,-56(r1)
-
- stdu r1,-112-64(r1)
-
- /* save args into preserved regs */
- mr r31,r3 /* newstack (both) */
- mr r30,r4 /* start (real) */
- mr r29,r5 /* image (virt) */
- mr r28,r6 /* control, unused */
- mr r27,r7 /* clear_all() fn desc */
- mr r26,r8 /* spare */
- lhz r25,PACAHWCPUID(r13) /* get our phys cpu from paca */
-
- /* disable interrupts, we are overwriting kernel data next */
- mfmsr r3
- rlwinm r3,r3,0,17,15
- mtmsrd r3,1
-
- /* copy dest pages, flush whole dest image */
- mr r3,r29
- bl .kexec_copy_flush /* (image) */
-
- /* turn off mmu */
- bl real_mode
-
- /* clear out hardware hash page table and tlb */
- ld r5,0(r27) /* deref function descriptor */
- mtctr r5
- bctrl /* ppc_md.hash_clear_all(void); */
-
-/*
- * kexec image calling is:
- * the first 0x100 bytes of the entry point are copied to 0
- *
- * all slaves branch to slave = 0x60 (absolute)
- * slave(phys_cpu_id);
- *
- * master goes to start = entry point
- * start(phys_cpu_id, start, 0);
- *
- *
- * a wrapper is needed to call existing kernels, here is an approximate
- * description of one method:
- *
- * v2: (2.6.10)
- * start will be near the boot_block (maybe 0x100 bytes before it?)
- * it will have a 0x60, which will b to boot_block, where it will wait
- * and 0 will store phys into struct boot-block and load r3 from there,
- * copy kernel 0-0x100 and tell slaves to back down to 0x60 again
- *
- * v1: (2.6.9)
- * boot block will have all cpus scanning device tree to see if they
- * are the boot cpu ?????
- * other device tree differences (prop sizes, va vs pa, etc)...
- */
-
- /* copy 0x100 bytes starting at start to 0 */
- li r3,0
- mr r4,r30
- li r5,0x100
- li r6,0
- bl .copy_and_flush /* (dest, src, copy limit, start offset) */
-1: /* assume normal blr return */
-
- /* release other cpus to the new kernel secondary start at 0x60 */
- mflr r5
- li r6,1
- stw r6,kexec_flag-1b(5)
- mr r3,r25 # my phys cpu
- mr r4,r30 # start, aka phys mem offset
- mtlr 4
- li r5,0
- blr /* image->start(physid, image->start, 0); */
-#endif /* CONFIG_KEXEC */
+++ /dev/null
-/*
- * c 2001 PPC 64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/console.h>
-#include <net/checksum.h>
-
-#include <asm/processor.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/hw_irq.h>
-#include <asm/abs_addr.h>
-#include <asm/cacheflush.h>
-
-EXPORT_SYMBOL(strcpy);
-EXPORT_SYMBOL(strncpy);
-EXPORT_SYMBOL(strcat);
-EXPORT_SYMBOL(strncat);
-EXPORT_SYMBOL(strchr);
-EXPORT_SYMBOL(strrchr);
-EXPORT_SYMBOL(strpbrk);
-EXPORT_SYMBOL(strstr);
-EXPORT_SYMBOL(strlen);
-EXPORT_SYMBOL(strnlen);
-EXPORT_SYMBOL(strcmp);
-EXPORT_SYMBOL(strncmp);
-
-EXPORT_SYMBOL(csum_partial);
-EXPORT_SYMBOL(csum_partial_copy_generic);
-EXPORT_SYMBOL(ip_fast_csum);
-EXPORT_SYMBOL(csum_tcpudp_magic);
-
-EXPORT_SYMBOL(__copy_tofrom_user);
-EXPORT_SYMBOL(__clear_user);
-EXPORT_SYMBOL(__strncpy_from_user);
-EXPORT_SYMBOL(__strnlen_user);
-
-EXPORT_SYMBOL(reloc_offset);
-
-EXPORT_SYMBOL(_insb);
-EXPORT_SYMBOL(_outsb);
-EXPORT_SYMBOL(_insw);
-EXPORT_SYMBOL(_outsw);
-EXPORT_SYMBOL(_insl);
-EXPORT_SYMBOL(_outsl);
-EXPORT_SYMBOL(_insw_ns);
-EXPORT_SYMBOL(_outsw_ns);
-EXPORT_SYMBOL(_insl_ns);
-EXPORT_SYMBOL(_outsl_ns);
-
-EXPORT_SYMBOL(kernel_thread);
-
-EXPORT_SYMBOL(giveup_fpu);
-#ifdef CONFIG_ALTIVEC
-EXPORT_SYMBOL(giveup_altivec);
-#endif
-EXPORT_SYMBOL(__flush_icache_range);
-EXPORT_SYMBOL(flush_dcache_range);
-
-EXPORT_SYMBOL(memcpy);
-EXPORT_SYMBOL(memset);
-EXPORT_SYMBOL(memmove);
-EXPORT_SYMBOL(memscan);
-EXPORT_SYMBOL(memcmp);
-EXPORT_SYMBOL(memchr);
-
-EXPORT_SYMBOL(timer_interrupt);
-EXPORT_SYMBOL(console_drivers);
+++ /dev/null
-/*
- *
- *
- * Procedures for interfacing to Open Firmware.
- *
- * Paul Mackerras August 1996.
- * Copyright (C) 1996 Paul Mackerras.
- *
- * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
- * {engebret|bergner}@us.ibm.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#undef DEBUG
-
-#include <stdarg.h>
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/threads.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/stringify.h>
-#include <linux/delay.h>
-#include <linux/initrd.h>
-#include <linux/bitops.h>
-#include <linux/module.h>
-#include <linux/module.h>
-
-#include <asm/prom.h>
-#include <asm/rtas.h>
-#include <asm/lmb.h>
-#include <asm/abs_addr.h>
-#include <asm/page.h>
-#include <asm/processor.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/smp.h>
-#include <asm/system.h>
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-#include <asm/pci.h>
-#include <asm/iommu.h>
-#include <asm/btext.h>
-#include <asm/sections.h>
-#include <asm/machdep.h>
-#include <asm/pSeries_reconfig.h>
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-struct pci_reg_property {
- struct pci_address addr;
- u32 size_hi;
- u32 size_lo;
-};
-
-struct isa_reg_property {
- u32 space;
- u32 address;
- u32 size;
-};
-
-
-typedef int interpret_func(struct device_node *, unsigned long *,
- int, int, int);
-
-extern struct rtas_t rtas;
-extern struct lmb lmb;
-extern unsigned long klimit;
-extern unsigned long memory_limit;
-
-static int __initdata dt_root_addr_cells;
-static int __initdata dt_root_size_cells;
-static int __initdata iommu_is_off;
-int __initdata iommu_force_on;
-unsigned long tce_alloc_start, tce_alloc_end;
-
-typedef u32 cell_t;
-
-#if 0
-static struct boot_param_header *initial_boot_params __initdata;
-#else
-struct boot_param_header *initial_boot_params;
-#endif
-
-static struct device_node *allnodes = NULL;
-
-/* use when traversing tree through the allnext, child, sibling,
- * or parent members of struct device_node.
- */
-static DEFINE_RWLOCK(devtree_lock);
-
-/* export that to outside world */
-struct device_node *of_chosen;
-
-/*
- * Wrapper for allocating memory for various data that needs to be
- * attached to device nodes as they are processed at boot or when
- * added to the device tree later (e.g. DLPAR). At boot there is
- * already a region reserved so we just increment *mem_start by size;
- * otherwise we call kmalloc.
- */
-static void * prom_alloc(unsigned long size, unsigned long *mem_start)
-{
- unsigned long tmp;
-
- if (!mem_start)
- return kmalloc(size, GFP_KERNEL);
-
- tmp = *mem_start;
- *mem_start += size;
- return (void *)tmp;
-}
-
-/*
- * Find the device_node with a given phandle.
- */
-static struct device_node * find_phandle(phandle ph)
-{
- struct device_node *np;
-
- for (np = allnodes; np != 0; np = np->allnext)
- if (np->linux_phandle == ph)
- return np;
- return NULL;
-}
-
-/*
- * Find the interrupt parent of a node.
- */
-static struct device_node * __devinit intr_parent(struct device_node *p)
-{
- phandle *parp;
-
- parp = (phandle *) get_property(p, "interrupt-parent", NULL);
- if (parp == NULL)
- return p->parent;
- return find_phandle(*parp);
-}
-
-/*
- * Find out the size of each entry of the interrupts property
- * for a node.
- */
-int __devinit prom_n_intr_cells(struct device_node *np)
-{
- struct device_node *p;
- unsigned int *icp;
-
- for (p = np; (p = intr_parent(p)) != NULL; ) {
- icp = (unsigned int *)
- get_property(p, "#interrupt-cells", NULL);
- if (icp != NULL)
- return *icp;
- if (get_property(p, "interrupt-controller", NULL) != NULL
- || get_property(p, "interrupt-map", NULL) != NULL) {
- printk("oops, node %s doesn't have #interrupt-cells\n",
- p->full_name);
- return 1;
- }
- }
-#ifdef DEBUG_IRQ
- printk("prom_n_intr_cells failed for %s\n", np->full_name);
-#endif
- return 1;
-}
-
-/*
- * Map an interrupt from a device up to the platform interrupt
- * descriptor.
- */
-static int __devinit map_interrupt(unsigned int **irq, struct device_node **ictrler,
- struct device_node *np, unsigned int *ints,
- int nintrc)
-{
- struct device_node *p, *ipar;
- unsigned int *imap, *imask, *ip;
- int i, imaplen, match;
- int newintrc = 0, newaddrc = 0;
- unsigned int *reg;
- int naddrc;
-
- reg = (unsigned int *) get_property(np, "reg", NULL);
- naddrc = prom_n_addr_cells(np);
- p = intr_parent(np);
- while (p != NULL) {
- if (get_property(p, "interrupt-controller", NULL) != NULL)
- /* this node is an interrupt controller, stop here */
- break;
- imap = (unsigned int *)
- get_property(p, "interrupt-map", &imaplen);
- if (imap == NULL) {
- p = intr_parent(p);
- continue;
- }
- imask = (unsigned int *)
- get_property(p, "interrupt-map-mask", NULL);
- if (imask == NULL) {
- printk("oops, %s has interrupt-map but no mask\n",
- p->full_name);
- return 0;
- }
- imaplen /= sizeof(unsigned int);
- match = 0;
- ipar = NULL;
- while (imaplen > 0 && !match) {
- /* check the child-interrupt field */
- match = 1;
- for (i = 0; i < naddrc && match; ++i)
- match = ((reg[i] ^ imap[i]) & imask[i]) == 0;
- for (; i < naddrc + nintrc && match; ++i)
- match = ((ints[i-naddrc] ^ imap[i]) & imask[i]) == 0;
- imap += naddrc + nintrc;
- imaplen -= naddrc + nintrc;
- /* grab the interrupt parent */
- ipar = find_phandle((phandle) *imap++);
- --imaplen;
- if (ipar == NULL) {
- printk("oops, no int parent %x in map of %s\n",
- imap[-1], p->full_name);
- return 0;
- }
- /* find the parent's # addr and intr cells */
- ip = (unsigned int *)
- get_property(ipar, "#interrupt-cells", NULL);
- if (ip == NULL) {
- printk("oops, no #interrupt-cells on %s\n",
- ipar->full_name);
- return 0;
- }
- newintrc = *ip;
- ip = (unsigned int *)
- get_property(ipar, "#address-cells", NULL);
- newaddrc = (ip == NULL)? 0: *ip;
- imap += newaddrc + newintrc;
- imaplen -= newaddrc + newintrc;
- }
- if (imaplen < 0) {
- printk("oops, error decoding int-map on %s, len=%d\n",
- p->full_name, imaplen);
- return 0;
- }
- if (!match) {
-#ifdef DEBUG_IRQ
- printk("oops, no match in %s int-map for %s\n",
- p->full_name, np->full_name);
-#endif
- return 0;
- }
- p = ipar;
- naddrc = newaddrc;
- nintrc = newintrc;
- ints = imap - nintrc;
- reg = ints - naddrc;
- }
- if (p == NULL) {
-#ifdef DEBUG_IRQ
- printk("hmmm, int tree for %s doesn't have ctrler\n",
- np->full_name);
-#endif
- return 0;
- }
- *irq = ints;
- *ictrler = p;
- return nintrc;
-}
-
-static int __devinit finish_node_interrupts(struct device_node *np,
- unsigned long *mem_start,
- int measure_only)
-{
- unsigned int *ints;
- int intlen, intrcells, intrcount;
- int i, j, n;
- unsigned int *irq, virq;
- struct device_node *ic;
-
- ints = (unsigned int *) get_property(np, "interrupts", &intlen);
- if (ints == NULL)
- return 0;
- intrcells = prom_n_intr_cells(np);
- intlen /= intrcells * sizeof(unsigned int);
-
- np->intrs = prom_alloc(intlen * sizeof(*(np->intrs)), mem_start);
- if (!np->intrs)
- return -ENOMEM;
-
- if (measure_only)
- return 0;
-
- intrcount = 0;
- for (i = 0; i < intlen; ++i, ints += intrcells) {
- n = map_interrupt(&irq, &ic, np, ints, intrcells);
- if (n <= 0)
- continue;
-
- /* don't map IRQ numbers under a cascaded 8259 controller */
- if (ic && device_is_compatible(ic, "chrp,iic")) {
- np->intrs[intrcount].line = irq[0];
- } else {
- virq = virt_irq_create_mapping(irq[0]);
- if (virq == NO_IRQ) {
- printk(KERN_CRIT "Could not allocate interrupt"
- " number for %s\n", np->full_name);
- continue;
- }
- np->intrs[intrcount].line = irq_offset_up(virq);
- }
-
- /* We offset irq numbers for the u3 MPIC by 128 in PowerMac */
- if (_machine == PLATFORM_POWERMAC && ic && ic->parent) {
- char *name = get_property(ic->parent, "name", NULL);
- if (name && !strcmp(name, "u3"))
- np->intrs[intrcount].line += 128;
- else if (!(name && !strcmp(name, "mac-io")))
- /* ignore other cascaded controllers, such as
- the k2-sata-root */
- break;
- }
- np->intrs[intrcount].sense = 1;
- if (n > 1)
- np->intrs[intrcount].sense = irq[1];
- if (n > 2) {
- printk("hmmm, got %d intr cells for %s:", n,
- np->full_name);
- for (j = 0; j < n; ++j)
- printk(" %d", irq[j]);
- printk("\n");
- }
- ++intrcount;
- }
- np->n_intrs = intrcount;
-
- return 0;
-}
-
-static int __devinit interpret_pci_props(struct device_node *np,
- unsigned long *mem_start,
- int naddrc, int nsizec,
- int measure_only)
-{
- struct address_range *adr;
- struct pci_reg_property *pci_addrs;
- int i, l, n_addrs;
-
- pci_addrs = (struct pci_reg_property *)
- get_property(np, "assigned-addresses", &l);
- if (!pci_addrs)
- return 0;
-
- n_addrs = l / sizeof(*pci_addrs);
-
- adr = prom_alloc(n_addrs * sizeof(*adr), mem_start);
- if (!adr)
- return -ENOMEM;
-
- if (measure_only)
- return 0;
-
- np->addrs = adr;
- np->n_addrs = n_addrs;
-
- for (i = 0; i < n_addrs; i++) {
- adr[i].space = pci_addrs[i].addr.a_hi;
- adr[i].address = pci_addrs[i].addr.a_lo |
- ((u64)pci_addrs[i].addr.a_mid << 32);
- adr[i].size = pci_addrs[i].size_lo;
- }
-
- return 0;
-}
-
-static int __init interpret_dbdma_props(struct device_node *np,
- unsigned long *mem_start,
- int naddrc, int nsizec,
- int measure_only)
-{
- struct reg_property32 *rp;
- struct address_range *adr;
- unsigned long base_address;
- int i, l;
- struct device_node *db;
-
- base_address = 0;
- if (!measure_only) {
- for (db = np->parent; db != NULL; db = db->parent) {
- if (!strcmp(db->type, "dbdma") && db->n_addrs != 0) {
- base_address = db->addrs[0].address;
- break;
- }
- }
- }
-
- rp = (struct reg_property32 *) get_property(np, "reg", &l);
- if (rp != 0 && l >= sizeof(struct reg_property32)) {
- i = 0;
- adr = (struct address_range *) (*mem_start);
- while ((l -= sizeof(struct reg_property32)) >= 0) {
- if (!measure_only) {
- adr[i].space = 2;
- adr[i].address = rp[i].address + base_address;
- adr[i].size = rp[i].size;
- }
- ++i;
- }
- np->addrs = adr;
- np->n_addrs = i;
- (*mem_start) += i * sizeof(struct address_range);
- }
-
- return 0;
-}
-
-static int __init interpret_macio_props(struct device_node *np,
- unsigned long *mem_start,
- int naddrc, int nsizec,
- int measure_only)
-{
- struct reg_property32 *rp;
- struct address_range *adr;
- unsigned long base_address;
- int i, l;
- struct device_node *db;
-
- base_address = 0;
- if (!measure_only) {
- for (db = np->parent; db != NULL; db = db->parent) {
- if (!strcmp(db->type, "mac-io") && db->n_addrs != 0) {
- base_address = db->addrs[0].address;
- break;
- }
- }
- }
-
- rp = (struct reg_property32 *) get_property(np, "reg", &l);
- if (rp != 0 && l >= sizeof(struct reg_property32)) {
- i = 0;
- adr = (struct address_range *) (*mem_start);
- while ((l -= sizeof(struct reg_property32)) >= 0) {
- if (!measure_only) {
- adr[i].space = 2;
- adr[i].address = rp[i].address + base_address;
- adr[i].size = rp[i].size;
- }
- ++i;
- }
- np->addrs = adr;
- np->n_addrs = i;
- (*mem_start) += i * sizeof(struct address_range);
- }
-
- return 0;
-}
-
-static int __init interpret_isa_props(struct device_node *np,
- unsigned long *mem_start,
- int naddrc, int nsizec,
- int measure_only)
-{
- struct isa_reg_property *rp;
- struct address_range *adr;
- int i, l;
-
- rp = (struct isa_reg_property *) get_property(np, "reg", &l);
- if (rp != 0 && l >= sizeof(struct isa_reg_property)) {
- i = 0;
- adr = (struct address_range *) (*mem_start);
- while ((l -= sizeof(struct isa_reg_property)) >= 0) {
- if (!measure_only) {
- adr[i].space = rp[i].space;
- adr[i].address = rp[i].address;
- adr[i].size = rp[i].size;
- }
- ++i;
- }
- np->addrs = adr;
- np->n_addrs = i;
- (*mem_start) += i * sizeof(struct address_range);
- }
-
- return 0;
-}
-
-static int __init interpret_root_props(struct device_node *np,
- unsigned long *mem_start,
- int naddrc, int nsizec,
- int measure_only)
-{
- struct address_range *adr;
- int i, l;
- unsigned int *rp;
- int rpsize = (naddrc + nsizec) * sizeof(unsigned int);
-
- rp = (unsigned int *) get_property(np, "reg", &l);
- if (rp != 0 && l >= rpsize) {
- i = 0;
- adr = (struct address_range *) (*mem_start);
- while ((l -= rpsize) >= 0) {
- if (!measure_only) {
- adr[i].space = 0;
- adr[i].address = rp[naddrc - 1];
- adr[i].size = rp[naddrc + nsizec - 1];
- }
- ++i;
- rp += naddrc + nsizec;
- }
- np->addrs = adr;
- np->n_addrs = i;
- (*mem_start) += i * sizeof(struct address_range);
- }
-
- return 0;
-}
-
-static int __devinit finish_node(struct device_node *np,
- unsigned long *mem_start,
- interpret_func *ifunc,
- int naddrc, int nsizec,
- int measure_only)
-{
- struct device_node *child;
- int *ip, rc = 0;
-
- /* get the device addresses and interrupts */
- if (ifunc != NULL)
- rc = ifunc(np, mem_start, naddrc, nsizec, measure_only);
- if (rc)
- goto out;
-
- rc = finish_node_interrupts(np, mem_start, measure_only);
- if (rc)
- goto out;
-
- /* Look for #address-cells and #size-cells properties. */
- ip = (int *) get_property(np, "#address-cells", NULL);
- if (ip != NULL)
- naddrc = *ip;
- ip = (int *) get_property(np, "#size-cells", NULL);
- if (ip != NULL)
- nsizec = *ip;
-
- if (!strcmp(np->name, "device-tree") || np->parent == NULL)
- ifunc = interpret_root_props;
- else if (np->type == 0)
- ifunc = NULL;
- else if (!strcmp(np->type, "pci") || !strcmp(np->type, "vci"))
- ifunc = interpret_pci_props;
- else if (!strcmp(np->type, "dbdma"))
- ifunc = interpret_dbdma_props;
- else if (!strcmp(np->type, "mac-io") || ifunc == interpret_macio_props)
- ifunc = interpret_macio_props;
- else if (!strcmp(np->type, "isa"))
- ifunc = interpret_isa_props;
- else if (!strcmp(np->name, "uni-n") || !strcmp(np->name, "u3"))
- ifunc = interpret_root_props;
- else if (!((ifunc == interpret_dbdma_props
- || ifunc == interpret_macio_props)
- && (!strcmp(np->type, "escc")
- || !strcmp(np->type, "media-bay"))))
- ifunc = NULL;
-
- for (child = np->child; child != NULL; child = child->sibling) {
- rc = finish_node(child, mem_start, ifunc,
- naddrc, nsizec, measure_only);
- if (rc)
- goto out;
- }
-out:
- return rc;
-}
-
-/**
- * finish_device_tree is called once things are running normally
- * (i.e. with text and data mapped to the address they were linked at).
- * It traverses the device tree and fills in some of the additional,
- * fields in each node like {n_}addrs and {n_}intrs, the virt interrupt
- * mapping is also initialized at this point.
- */
-void __init finish_device_tree(void)
-{
- unsigned long start, end, size = 0;
-
- DBG(" -> finish_device_tree\n");
-
- if (ppc64_interrupt_controller == IC_INVALID) {
- DBG("failed to configure interrupt controller type\n");
- panic("failed to configure interrupt controller type\n");
- }
-
- /* Initialize virtual IRQ map */
- virt_irq_init();
-
- /*
- * Finish device-tree (pre-parsing some properties etc...)
- * We do this in 2 passes. One with "measure_only" set, which
- * will only measure the amount of memory needed, then we can
- * allocate that memory, and call finish_node again. However,
- * we must be careful as most routines will fail nowadays when
- * prom_alloc() returns 0, so we must make sure our first pass
- * doesn't start at 0. We pre-initialize size to 16 for that
- * reason and then remove those additional 16 bytes
- */
- size = 16;
- finish_node(allnodes, &size, NULL, 0, 0, 1);
- size -= 16;
- end = start = (unsigned long)abs_to_virt(lmb_alloc(size, 128));
- finish_node(allnodes, &end, NULL, 0, 0, 0);
- BUG_ON(end != start + size);
-
- DBG(" <- finish_device_tree\n");
-}
-
-#ifdef DEBUG
-#define printk udbg_printf
-#endif
-
-static inline char *find_flat_dt_string(u32 offset)
-{
- return ((char *)initial_boot_params) +
- initial_boot_params->off_dt_strings + offset;
-}
-
-/**
- * This function is used to scan the flattened device-tree, it is
- * used to extract the memory informations at boot before we can
- * unflatten the tree
- */
-int __init of_scan_flat_dt(int (*it)(unsigned long node,
- const char *uname, int depth,
- void *data),
- void *data)
-{
- unsigned long p = ((unsigned long)initial_boot_params) +
- initial_boot_params->off_dt_struct;
- int rc = 0;
- int depth = -1;
-
- do {
- u32 tag = *((u32 *)p);
- char *pathp;
-
- p += 4;
- if (tag == OF_DT_END_NODE) {
- depth --;
- continue;
- }
- if (tag == OF_DT_NOP)
- continue;
- if (tag == OF_DT_END)
- break;
- if (tag == OF_DT_PROP) {
- u32 sz = *((u32 *)p);
- p += 8;
- if (initial_boot_params->version < 0x10)
- p = _ALIGN(p, sz >= 8 ? 8 : 4);
- p += sz;
- p = _ALIGN(p, 4);
- continue;
- }
- if (tag != OF_DT_BEGIN_NODE) {
- printk(KERN_WARNING "Invalid tag %x scanning flattened"
- " device tree !\n", tag);
- return -EINVAL;
- }
- depth++;
- pathp = (char *)p;
- p = _ALIGN(p + strlen(pathp) + 1, 4);
- if ((*pathp) == '/') {
- char *lp, *np;
- for (lp = NULL, np = pathp; *np; np++)
- if ((*np) == '/')
- lp = np+1;
- if (lp != NULL)
- pathp = lp;
- }
- rc = it(p, pathp, depth, data);
- if (rc != 0)
- break;
- } while(1);
-
- return rc;
-}
-
-/**
- * This function can be used within scan_flattened_dt callback to get
- * access to properties
- */
-void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
- unsigned long *size)
-{
- unsigned long p = node;
-
- do {
- u32 tag = *((u32 *)p);
- u32 sz, noff;
- const char *nstr;
-
- p += 4;
- if (tag == OF_DT_NOP)
- continue;
- if (tag != OF_DT_PROP)
- return NULL;
-
- sz = *((u32 *)p);
- noff = *((u32 *)(p + 4));
- p += 8;
- if (initial_boot_params->version < 0x10)
- p = _ALIGN(p, sz >= 8 ? 8 : 4);
-
- nstr = find_flat_dt_string(noff);
- if (nstr == NULL) {
- printk(KERN_WARNING "Can't find property index"
- " name !\n");
- return NULL;
- }
- if (strcmp(name, nstr) == 0) {
- if (size)
- *size = sz;
- return (void *)p;
- }
- p += sz;
- p = _ALIGN(p, 4);
- } while(1);
-}
-
-static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
- unsigned long align)
-{
- void *res;
-
- *mem = _ALIGN(*mem, align);
- res = (void *)*mem;
- *mem += size;
-
- return res;
-}
-
-static unsigned long __init unflatten_dt_node(unsigned long mem,
- unsigned long *p,
- struct device_node *dad,
- struct device_node ***allnextpp,
- unsigned long fpsize)
-{
- struct device_node *np;
- struct property *pp, **prev_pp = NULL;
- char *pathp;
- u32 tag;
- unsigned int l, allocl;
- int has_name = 0;
- int new_format = 0;
-
- tag = *((u32 *)(*p));
- if (tag != OF_DT_BEGIN_NODE) {
- printk("Weird tag at start of node: %x\n", tag);
- return mem;
- }
- *p += 4;
- pathp = (char *)*p;
- l = allocl = strlen(pathp) + 1;
- *p = _ALIGN(*p + l, 4);
-
- /* version 0x10 has a more compact unit name here instead of the full
- * path. we accumulate the full path size using "fpsize", we'll rebuild
- * it later. We detect this because the first character of the name is
- * not '/'.
- */
- if ((*pathp) != '/') {
- new_format = 1;
- if (fpsize == 0) {
- /* root node: special case. fpsize accounts for path
- * plus terminating zero. root node only has '/', so
- * fpsize should be 2, but we want to avoid the first
- * level nodes to have two '/' so we use fpsize 1 here
- */
- fpsize = 1;
- allocl = 2;
- } else {
- /* account for '/' and path size minus terminal 0
- * already in 'l'
- */
- fpsize += l;
- allocl = fpsize;
- }
- }
-
-
- np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
- __alignof__(struct device_node));
- if (allnextpp) {
- memset(np, 0, sizeof(*np));
- np->full_name = ((char*)np) + sizeof(struct device_node);
- if (new_format) {
- char *p = np->full_name;
- /* rebuild full path for new format */
- if (dad && dad->parent) {
- strcpy(p, dad->full_name);
-#ifdef DEBUG
- if ((strlen(p) + l + 1) != allocl) {
- DBG("%s: p: %d, l: %d, a: %d\n",
- pathp, strlen(p), l, allocl);
- }
-#endif
- p += strlen(p);
- }
- *(p++) = '/';
- memcpy(p, pathp, l);
- } else
- memcpy(np->full_name, pathp, l);
- prev_pp = &np->properties;
- **allnextpp = np;
- *allnextpp = &np->allnext;
- if (dad != NULL) {
- np->parent = dad;
- /* we temporarily use the next field as `last_child'*/
- if (dad->next == 0)
- dad->child = np;
- else
- dad->next->sibling = np;
- dad->next = np;
- }
- kref_init(&np->kref);
- }
- while(1) {
- u32 sz, noff;
- char *pname;
-
- tag = *((u32 *)(*p));
- if (tag == OF_DT_NOP) {
- *p += 4;
- continue;
- }
- if (tag != OF_DT_PROP)
- break;
- *p += 4;
- sz = *((u32 *)(*p));
- noff = *((u32 *)((*p) + 4));
- *p += 8;
- if (initial_boot_params->version < 0x10)
- *p = _ALIGN(*p, sz >= 8 ? 8 : 4);
-
- pname = find_flat_dt_string(noff);
- if (pname == NULL) {
- printk("Can't find property name in list !\n");
- break;
- }
- if (strcmp(pname, "name") == 0)
- has_name = 1;
- l = strlen(pname) + 1;
- pp = unflatten_dt_alloc(&mem, sizeof(struct property),
- __alignof__(struct property));
- if (allnextpp) {
- if (strcmp(pname, "linux,phandle") == 0) {
- np->node = *((u32 *)*p);
- if (np->linux_phandle == 0)
- np->linux_phandle = np->node;
- }
- if (strcmp(pname, "ibm,phandle") == 0)
- np->linux_phandle = *((u32 *)*p);
- pp->name = pname;
- pp->length = sz;
- pp->value = (void *)*p;
- *prev_pp = pp;
- prev_pp = &pp->next;
- }
- *p = _ALIGN((*p) + sz, 4);
- }
- /* with version 0x10 we may not have the name property, recreate
- * it here from the unit name if absent
- */
- if (!has_name) {
- char *p = pathp, *ps = pathp, *pa = NULL;
- int sz;
-
- while (*p) {
- if ((*p) == '@')
- pa = p;
- if ((*p) == '/')
- ps = p + 1;
- p++;
- }
- if (pa < ps)
- pa = p;
- sz = (pa - ps) + 1;
- pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz,
- __alignof__(struct property));
- if (allnextpp) {
- pp->name = "name";
- pp->length = sz;
- pp->value = (unsigned char *)(pp + 1);
- *prev_pp = pp;
- prev_pp = &pp->next;
- memcpy(pp->value, ps, sz - 1);
- ((char *)pp->value)[sz - 1] = 0;
- DBG("fixed up name for %s -> %s\n", pathp, pp->value);
- }
- }
- if (allnextpp) {
- *prev_pp = NULL;
- np->name = get_property(np, "name", NULL);
- np->type = get_property(np, "device_type", NULL);
-
- if (!np->name)
- np->name = "<NULL>";
- if (!np->type)
- np->type = "<NULL>";
- }
- while (tag == OF_DT_BEGIN_NODE) {
- mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize);
- tag = *((u32 *)(*p));
- }
- if (tag != OF_DT_END_NODE) {
- printk("Weird tag at end of node: %x\n", tag);
- return mem;
- }
- *p += 4;
- return mem;
-}
-
-
-/**
- * unflattens the device-tree passed by the firmware, creating the
- * tree of struct device_node. It also fills the "name" and "type"
- * pointers of the nodes so the normal device-tree walking functions
- * can be used (this used to be done by finish_device_tree)
- */
-void __init unflatten_device_tree(void)
-{
- unsigned long start, mem, size;
- struct device_node **allnextp = &allnodes;
- char *p = NULL;
- int l = 0;
-
- DBG(" -> unflatten_device_tree()\n");
-
- /* First pass, scan for size */
- start = ((unsigned long)initial_boot_params) +
- initial_boot_params->off_dt_struct;
- size = unflatten_dt_node(0, &start, NULL, NULL, 0);
- size = (size | 3) + 1;
-
- DBG(" size is %lx, allocating...\n", size);
-
- /* Allocate memory for the expanded device tree */
- mem = lmb_alloc(size + 4, __alignof__(struct device_node));
- if (!mem) {
- DBG("Couldn't allocate memory with lmb_alloc()!\n");
- panic("Couldn't allocate memory with lmb_alloc()!\n");
- }
- mem = (unsigned long)abs_to_virt(mem);
-
- ((u32 *)mem)[size / 4] = 0xdeadbeef;
-
- DBG(" unflattening...\n", mem);
-
- /* Second pass, do actual unflattening */
- start = ((unsigned long)initial_boot_params) +
- initial_boot_params->off_dt_struct;
- unflatten_dt_node(mem, &start, NULL, &allnextp, 0);
- if (*((u32 *)start) != OF_DT_END)
- printk(KERN_WARNING "Weird tag at end of tree: %08x\n", *((u32 *)start));
- if (((u32 *)mem)[size / 4] != 0xdeadbeef)
- printk(KERN_WARNING "End of tree marker overwritten: %08x\n",
- ((u32 *)mem)[size / 4] );
- *allnextp = NULL;
-
- /* Get pointer to OF "/chosen" node for use everywhere */
- of_chosen = of_find_node_by_path("/chosen");
-
- /* Retreive command line */
- if (of_chosen != NULL) {
- p = (char *)get_property(of_chosen, "bootargs", &l);
- if (p != NULL && l > 0)
- strlcpy(cmd_line, p, min(l, COMMAND_LINE_SIZE));
- }
-#ifdef CONFIG_CMDLINE
- if (l == 0 || (l == 1 && (*p) == 0))
- strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#endif /* CONFIG_CMDLINE */
-
- DBG("Command line is: %s\n", cmd_line);
-
- DBG(" <- unflatten_device_tree()\n");
-}
-
-
-static int __init early_init_dt_scan_cpus(unsigned long node,
- const char *uname, int depth, void *data)
-{
- char *type = of_get_flat_dt_prop(node, "device_type", NULL);
- u32 *prop;
- unsigned long size;
-
- /* We are scanning "cpu" nodes only */
- if (type == NULL || strcmp(type, "cpu") != 0)
- return 0;
-
- if (initial_boot_params && initial_boot_params->version >= 2) {
- /* version 2 of the kexec param format adds the phys cpuid
- * of booted proc.
- */
- boot_cpuid_phys = initial_boot_params->boot_cpuid_phys;
- boot_cpuid = 0;
- } else {
- /* Check if it's the boot-cpu, set it's hw index in paca now */
- if (of_get_flat_dt_prop(node, "linux,boot-cpu", NULL)
- != NULL) {
- u32 *prop = of_get_flat_dt_prop(node, "reg", NULL);
- set_hard_smp_processor_id(0, prop == NULL ? 0 : *prop);
- boot_cpuid_phys = get_hard_smp_processor_id(0);
- }
- }
-
-#ifdef CONFIG_ALTIVEC
- /* Check if we have a VMX and eventually update CPU features */
- prop = (u32 *)of_get_flat_dt_prop(node, "ibm,vmx", NULL);
- if (prop && (*prop) > 0) {
- cur_cpu_spec->cpu_features |= CPU_FTR_ALTIVEC;
- cur_cpu_spec->cpu_user_features |= PPC_FEATURE_HAS_ALTIVEC;
- }
-
- /* Same goes for Apple's "altivec" property */
- prop = (u32 *)of_get_flat_dt_prop(node, "altivec", NULL);
- if (prop) {
- cur_cpu_spec->cpu_features |= CPU_FTR_ALTIVEC;
- cur_cpu_spec->cpu_user_features |= PPC_FEATURE_HAS_ALTIVEC;
- }
-#endif /* CONFIG_ALTIVEC */
-
- /*
- * Check for an SMT capable CPU and set the CPU feature. We do
- * this by looking at the size of the ibm,ppc-interrupt-server#s
- * property
- */
- prop = (u32 *)of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s",
- &size);
- cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
- if (prop && ((size / sizeof(u32)) > 1))
- cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
-
- return 0;
-}
-
-static int __init early_init_dt_scan_chosen(unsigned long node,
- const char *uname, int depth, void *data)
-{
- u32 *prop;
- u64 *prop64;
-
- DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
-
- if (depth != 1 || strcmp(uname, "chosen") != 0)
- return 0;
-
- /* get platform type */
- prop = (u32 *)of_get_flat_dt_prop(node, "linux,platform", NULL);
- if (prop == NULL)
- return 0;
- _machine = *prop;
-
- /* check if iommu is forced on or off */
- if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)
- iommu_is_off = 1;
- if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL)
- iommu_force_on = 1;
-
- prop64 = (u64*)of_get_flat_dt_prop(node, "linux,memory-limit", NULL);
- if (prop64)
- memory_limit = *prop64;
-
- prop64 = (u64*)of_get_flat_dt_prop(node, "linux,tce-alloc-start",NULL);
- if (prop64)
- tce_alloc_start = *prop64;
-
- prop64 = (u64*)of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);
- if (prop64)
- tce_alloc_end = *prop64;
-
-#ifdef CONFIG_PPC_RTAS
- /* To help early debugging via the front panel, we retreive a minimal
- * set of RTAS infos now if available
- */
- {
- u64 *basep, *entryp;
-
- basep = (u64*)of_get_flat_dt_prop(node,
- "linux,rtas-base", NULL);
- entryp = (u64*)of_get_flat_dt_prop(node,
- "linux,rtas-entry", NULL);
- prop = (u32*)of_get_flat_dt_prop(node,
- "linux,rtas-size", NULL);
- if (basep && entryp && prop) {
- rtas.base = *basep;
- rtas.entry = *entryp;
- rtas.size = *prop;
- }
- }
-#endif /* CONFIG_PPC_RTAS */
-
- /* break now */
- return 1;
-}
-
-static int __init early_init_dt_scan_root(unsigned long node,
- const char *uname, int depth, void *data)
-{
- u32 *prop;
-
- if (depth != 0)
- return 0;
-
- prop = (u32 *)of_get_flat_dt_prop(node, "#size-cells", NULL);
- dt_root_size_cells = (prop == NULL) ? 1 : *prop;
- DBG("dt_root_size_cells = %x\n", dt_root_size_cells);
-
- prop = (u32 *)of_get_flat_dt_prop(node, "#address-cells", NULL);
- dt_root_addr_cells = (prop == NULL) ? 2 : *prop;
- DBG("dt_root_addr_cells = %x\n", dt_root_addr_cells);
-
- /* break now */
- return 1;
-}
-
-static unsigned long __init dt_mem_next_cell(int s, cell_t **cellp)
-{
- cell_t *p = *cellp;
- unsigned long r = 0;
-
- /* Ignore more than 2 cells */
- while (s > 2) {
- p++;
- s--;
- }
- while (s) {
- r <<= 32;
- r |= *(p++);
- s--;
- }
-
- *cellp = p;
- return r;
-}
-
-
-static int __init early_init_dt_scan_memory(unsigned long node,
- const char *uname, int depth, void *data)
-{
- char *type = of_get_flat_dt_prop(node, "device_type", NULL);
- cell_t *reg, *endp;
- unsigned long l;
-
- /* We are scanning "memory" nodes only */
- if (type == NULL || strcmp(type, "memory") != 0)
- return 0;
-
- reg = (cell_t *)of_get_flat_dt_prop(node, "reg", &l);
- if (reg == NULL)
- return 0;
-
- endp = reg + (l / sizeof(cell_t));
-
- DBG("memory scan node %s ..., reg size %ld, data: %x %x %x %x, ...\n",
- uname, l, reg[0], reg[1], reg[2], reg[3]);
-
- while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
- unsigned long base, size;
-
- base = dt_mem_next_cell(dt_root_addr_cells, ®);
- size = dt_mem_next_cell(dt_root_size_cells, ®);
-
- if (size == 0)
- continue;
- DBG(" - %lx , %lx\n", base, size);
- if (iommu_is_off) {
- if (base >= 0x80000000ul)
- continue;
- if ((base + size) > 0x80000000ul)
- size = 0x80000000ul - base;
- }
- lmb_add(base, size);
- }
- return 0;
-}
-
-static void __init early_reserve_mem(void)
-{
- u64 base, size;
- u64 *reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
- initial_boot_params->off_mem_rsvmap);
- while (1) {
- base = *(reserve_map++);
- size = *(reserve_map++);
- if (size == 0)
- break;
- DBG("reserving: %lx -> %lx\n", base, size);
- lmb_reserve(base, size);
- }
-
-#if 0
- DBG("memory reserved, lmbs :\n");
- lmb_dump_all();
-#endif
-}
-
-void __init early_init_devtree(void *params)
-{
- DBG(" -> early_init_devtree()\n");
-
- /* Setup flat device-tree pointer */
- initial_boot_params = params;
-
- /* Retreive various informations from the /chosen node of the
- * device-tree, including the platform type, initrd location and
- * size, TCE reserve, and more ...
- */
- of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
-
- /* Scan memory nodes and rebuild LMBs */
- lmb_init();
- of_scan_flat_dt(early_init_dt_scan_root, NULL);
- of_scan_flat_dt(early_init_dt_scan_memory, NULL);
- lmb_enforce_memory_limit(memory_limit);
- lmb_analyze();
- lmb_reserve(0, __pa(klimit));
-
- /* Reserve LMB regions used by kernel, initrd, dt, etc... */
- early_reserve_mem();
-
- DBG("Scanning CPUs ...\n");
-
- /* Retreive hash table size from flattened tree plus other
- * CPU related informations (altivec support, boot CPU ID, ...)
- */
- of_scan_flat_dt(early_init_dt_scan_cpus, NULL);
-
- DBG(" <- early_init_devtree()\n");
-}
-
-#undef printk
-
-int
-prom_n_addr_cells(struct device_node* np)
-{
- int* ip;
- do {
- if (np->parent)
- np = np->parent;
- ip = (int *) get_property(np, "#address-cells", NULL);
- if (ip != NULL)
- return *ip;
- } while (np->parent);
- /* No #address-cells property for the root node, default to 1 */
- return 1;
-}
-EXPORT_SYMBOL_GPL(prom_n_addr_cells);
-
-int
-prom_n_size_cells(struct device_node* np)
-{
- int* ip;
- do {
- if (np->parent)
- np = np->parent;
- ip = (int *) get_property(np, "#size-cells", NULL);
- if (ip != NULL)
- return *ip;
- } while (np->parent);
- /* No #size-cells property for the root node, default to 1 */
- return 1;
-}
-EXPORT_SYMBOL_GPL(prom_n_size_cells);
-
-/**
- * Work out the sense (active-low level / active-high edge)
- * of each interrupt from the device tree.
- */
-void __init prom_get_irq_senses(unsigned char *senses, int off, int max)
-{
- struct device_node *np;
- int i, j;
-
- /* default to level-triggered */
- memset(senses, 1, max - off);
-
- for (np = allnodes; np != 0; np = np->allnext) {
- for (j = 0; j < np->n_intrs; j++) {
- i = np->intrs[j].line;
- if (i >= off && i < max)
- senses[i-off] = np->intrs[j].sense ?
- IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE :
- IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE;
- }
- }
-}
-
-/**
- * Construct and return a list of the device_nodes with a given name.
- */
-struct device_node *
-find_devices(const char *name)
-{
- struct device_node *head, **prevp, *np;
-
- prevp = &head;
- for (np = allnodes; np != 0; np = np->allnext) {
- if (np->name != 0 && strcasecmp(np->name, name) == 0) {
- *prevp = np;
- prevp = &np->next;
- }
- }
- *prevp = NULL;
- return head;
-}
-EXPORT_SYMBOL(find_devices);
-
-/**
- * Construct and return a list of the device_nodes with a given type.
- */
-struct device_node *
-find_type_devices(const char *type)
-{
- struct device_node *head, **prevp, *np;
-
- prevp = &head;
- for (np = allnodes; np != 0; np = np->allnext) {
- if (np->type != 0 && strcasecmp(np->type, type) == 0) {
- *prevp = np;
- prevp = &np->next;
- }
- }
- *prevp = NULL;
- return head;
-}
-EXPORT_SYMBOL(find_type_devices);
-
-/**
- * Returns all nodes linked together
- */
-struct device_node *
-find_all_nodes(void)
-{
- struct device_node *head, **prevp, *np;
-
- prevp = &head;
- for (np = allnodes; np != 0; np = np->allnext) {
- *prevp = np;
- prevp = &np->next;
- }
- *prevp = NULL;
- return head;
-}
-EXPORT_SYMBOL(find_all_nodes);
-
-/** Checks if the given "compat" string matches one of the strings in
- * the device's "compatible" property
- */
-int
-device_is_compatible(struct device_node *device, const char *compat)
-{
- const char* cp;
- int cplen, l;
-
- cp = (char *) get_property(device, "compatible", &cplen);
- if (cp == NULL)
- return 0;
- while (cplen > 0) {
- if (strncasecmp(cp, compat, strlen(compat)) == 0)
- return 1;
- l = strlen(cp) + 1;
- cp += l;
- cplen -= l;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(device_is_compatible);
-
-
-/**
- * Indicates whether the root node has a given value in its
- * compatible property.
- */
-int
-machine_is_compatible(const char *compat)
-{
- struct device_node *root;
- int rc = 0;
-
- root = of_find_node_by_path("/");
- if (root) {
- rc = device_is_compatible(root, compat);
- of_node_put(root);
- }
- return rc;
-}
-EXPORT_SYMBOL(machine_is_compatible);
-
-/**
- * Construct and return a list of the device_nodes with a given type
- * and compatible property.
- */
-struct device_node *
-find_compatible_devices(const char *type, const char *compat)
-{
- struct device_node *head, **prevp, *np;
-
- prevp = &head;
- for (np = allnodes; np != 0; np = np->allnext) {
- if (type != NULL
- && !(np->type != 0 && strcasecmp(np->type, type) == 0))
- continue;
- if (device_is_compatible(np, compat)) {
- *prevp = np;
- prevp = &np->next;
- }
- }
- *prevp = NULL;
- return head;
-}
-EXPORT_SYMBOL(find_compatible_devices);
-
-/**
- * Find the device_node with a given full_name.
- */
-struct device_node *
-find_path_device(const char *path)
-{
- struct device_node *np;
-
- for (np = allnodes; np != 0; np = np->allnext)
- if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0)
- return np;
- return NULL;
-}
-EXPORT_SYMBOL(find_path_device);
-
-/*******
- *
- * New implementation of the OF "find" APIs, return a refcounted
- * object, call of_node_put() when done. The device tree and list
- * are protected by a rw_lock.
- *
- * Note that property management will need some locking as well,
- * this isn't dealt with yet.
- *
- *******/
-
-/**
- * of_find_node_by_name - Find a node by its "name" property
- * @from: The node to start searching from or NULL, the node
- * you pass will not be searched, only the next one
- * will; typically, you pass what the previous call
- * returned. of_node_put() will be called on it
- * @name: The name string to match against
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_node_by_name(struct device_node *from,
- const char *name)
-{
- struct device_node *np;
-
- read_lock(&devtree_lock);
- np = from ? from->allnext : allnodes;
- for (; np != 0; np = np->allnext)
- if (np->name != 0 && strcasecmp(np->name, name) == 0
- && of_node_get(np))
- break;
- if (from)
- of_node_put(from);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_node_by_name);
-
-/**
- * of_find_node_by_type - Find a node by its "device_type" property
- * @from: The node to start searching from or NULL, the node
- * you pass will not be searched, only the next one
- * will; typically, you pass what the previous call
- * returned. of_node_put() will be called on it
- * @name: The type string to match against
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_node_by_type(struct device_node *from,
- const char *type)
-{
- struct device_node *np;
-
- read_lock(&devtree_lock);
- np = from ? from->allnext : allnodes;
- for (; np != 0; np = np->allnext)
- if (np->type != 0 && strcasecmp(np->type, type) == 0
- && of_node_get(np))
- break;
- if (from)
- of_node_put(from);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_node_by_type);
-
-/**
- * of_find_compatible_node - Find a node based on type and one of the
- * tokens in its "compatible" property
- * @from: The node to start searching from or NULL, the node
- * you pass will not be searched, only the next one
- * will; typically, you pass what the previous call
- * returned. of_node_put() will be called on it
- * @type: The type string to match "device_type" or NULL to ignore
- * @compatible: The string to match to one of the tokens in the device
- * "compatible" list.
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_compatible_node(struct device_node *from,
- const char *type, const char *compatible)
-{
- struct device_node *np;
-
- read_lock(&devtree_lock);
- np = from ? from->allnext : allnodes;
- for (; np != 0; np = np->allnext) {
- if (type != NULL
- && !(np->type != 0 && strcasecmp(np->type, type) == 0))
- continue;
- if (device_is_compatible(np, compatible) && of_node_get(np))
- break;
- }
- if (from)
- of_node_put(from);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_compatible_node);
-
-/**
- * of_find_node_by_path - Find a node matching a full OF path
- * @path: The full path to match
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_node_by_path(const char *path)
-{
- struct device_node *np = allnodes;
-
- read_lock(&devtree_lock);
- for (; np != 0; np = np->allnext) {
- if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0
- && of_node_get(np))
- break;
- }
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_node_by_path);
-
-/**
- * of_find_node_by_phandle - Find a node given a phandle
- * @handle: phandle of the node to find
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_node_by_phandle(phandle handle)
-{
- struct device_node *np;
-
- read_lock(&devtree_lock);
- for (np = allnodes; np != 0; np = np->allnext)
- if (np->linux_phandle == handle)
- break;
- if (np)
- of_node_get(np);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_node_by_phandle);
-
-/**
- * of_find_all_nodes - Get next node in global list
- * @prev: Previous node or NULL to start iteration
- * of_node_put() will be called on it
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_all_nodes(struct device_node *prev)
-{
- struct device_node *np;
-
- read_lock(&devtree_lock);
- np = prev ? prev->allnext : allnodes;
- for (; np != 0; np = np->allnext)
- if (of_node_get(np))
- break;
- if (prev)
- of_node_put(prev);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_all_nodes);
-
-/**
- * of_get_parent - Get a node's parent if any
- * @node: Node to get parent
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_get_parent(const struct device_node *node)
-{
- struct device_node *np;
-
- if (!node)
- return NULL;
-
- read_lock(&devtree_lock);
- np = of_node_get(node->parent);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_get_parent);
-
-/**
- * of_get_next_child - Iterate a node childs
- * @node: parent node
- * @prev: previous child of the parent node, or NULL to get first
- *
- * Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_get_next_child(const struct device_node *node,
- struct device_node *prev)
-{
- struct device_node *next;
-
- read_lock(&devtree_lock);
- next = prev ? prev->sibling : node->child;
- for (; next != 0; next = next->sibling)
- if (of_node_get(next))
- break;
- if (prev)
- of_node_put(prev);
- read_unlock(&devtree_lock);
- return next;
-}
-EXPORT_SYMBOL(of_get_next_child);
-
-/**
- * of_node_get - Increment refcount of a node
- * @node: Node to inc refcount, NULL is supported to
- * simplify writing of callers
- *
- * Returns node.
- */
-struct device_node *of_node_get(struct device_node *node)
-{
- if (node)
- kref_get(&node->kref);
- return node;
-}
-EXPORT_SYMBOL(of_node_get);
-
-static inline struct device_node * kref_to_device_node(struct kref *kref)
-{
- return container_of(kref, struct device_node, kref);
-}
-
-/**
- * of_node_release - release a dynamically allocated node
- * @kref: kref element of the node to be released
- *
- * In of_node_put() this function is passed to kref_put()
- * as the destructor.
- */
-static void of_node_release(struct kref *kref)
-{
- struct device_node *node = kref_to_device_node(kref);
- struct property *prop = node->properties;
-
- if (!OF_IS_DYNAMIC(node))
- return;
- while (prop) {
- struct property *next = prop->next;
- kfree(prop->name);
- kfree(prop->value);
- kfree(prop);
- prop = next;
- }
- kfree(node->intrs);
- kfree(node->addrs);
- kfree(node->full_name);
- kfree(node->data);
- kfree(node);
-}
-
-/**
- * of_node_put - Decrement refcount of a node
- * @node: Node to dec refcount, NULL is supported to
- * simplify writing of callers
- *
- */
-void of_node_put(struct device_node *node)
-{
- if (node)
- kref_put(&node->kref, of_node_release);
-}
-EXPORT_SYMBOL(of_node_put);
-
-/*
- * Fix up the uninitialized fields in a new device node:
- * name, type, n_addrs, addrs, n_intrs, intrs, and pci-specific fields
- *
- * A lot of boot-time code is duplicated here, because functions such
- * as finish_node_interrupts, interpret_pci_props, etc. cannot use the
- * slab allocator.
- *
- * This should probably be split up into smaller chunks.
- */
-
-static int of_finish_dynamic_node(struct device_node *node,
- unsigned long *unused1, int unused2,
- int unused3, int unused4)
-{
- struct device_node *parent = of_get_parent(node);
- int err = 0;
- phandle *ibm_phandle;
-
- node->name = get_property(node, "name", NULL);
- node->type = get_property(node, "device_type", NULL);
-
- if (!parent) {
- err = -ENODEV;
- goto out;
- }
-
- /* We don't support that function on PowerMac, at least
- * not yet
- */
- if (_machine == PLATFORM_POWERMAC)
- return -ENODEV;
-
- /* fix up new node's linux_phandle field */
- if ((ibm_phandle = (unsigned int *)get_property(node, "ibm,phandle", NULL)))
- node->linux_phandle = *ibm_phandle;
-
-out:
- of_node_put(parent);
- return err;
-}
-
-/*
- * Plug a device node into the tree and global list.
- */
-void of_attach_node(struct device_node *np)
-{
- write_lock(&devtree_lock);
- np->sibling = np->parent->child;
- np->allnext = allnodes;
- np->parent->child = np;
- allnodes = np;
- write_unlock(&devtree_lock);
-}
-
-/*
- * "Unplug" a node from the device tree. The caller must hold
- * a reference to the node. The memory associated with the node
- * is not freed until its refcount goes to zero.
- */
-void of_detach_node(const struct device_node *np)
-{
- struct device_node *parent;
-
- write_lock(&devtree_lock);
-
- parent = np->parent;
-
- if (allnodes == np)
- allnodes = np->allnext;
- else {
- struct device_node *prev;
- for (prev = allnodes;
- prev->allnext != np;
- prev = prev->allnext)
- ;
- prev->allnext = np->allnext;
- }
-
- if (parent->child == np)
- parent->child = np->sibling;
- else {
- struct device_node *prevsib;
- for (prevsib = np->parent->child;
- prevsib->sibling != np;
- prevsib = prevsib->sibling)
- ;
- prevsib->sibling = np->sibling;
- }
-
- write_unlock(&devtree_lock);
-}
-
-static int prom_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
-{
- int err;
-
- switch (action) {
- case PSERIES_RECONFIG_ADD:
- err = finish_node(node, NULL, of_finish_dynamic_node, 0, 0, 0);
- if (err < 0) {
- printk(KERN_ERR "finish_node returned %d\n", err);
- err = NOTIFY_BAD;
- }
- break;
- default:
- err = NOTIFY_DONE;
- break;
- }
- return err;
-}
-
-static struct notifier_block prom_reconfig_nb = {
- .notifier_call = prom_reconfig_notifier,
- .priority = 10, /* This one needs to run first */
-};
-
-static int __init prom_reconfig_setup(void)
-{
- return pSeries_reconfig_notifier_register(&prom_reconfig_nb);
-}
-__initcall(prom_reconfig_setup);
-
-/*
- * Find a property with a given name for a given node
- * and return the value.
- */
-unsigned char *
-get_property(struct device_node *np, const char *name, int *lenp)
-{
- struct property *pp;
-
- for (pp = np->properties; pp != 0; pp = pp->next)
- if (strcmp(pp->name, name) == 0) {
- if (lenp != 0)
- *lenp = pp->length;
- return pp->value;
- }
- return NULL;
-}
-EXPORT_SYMBOL(get_property);
-
-/*
- * Add a property to a node.
- */
-int
-prom_add_property(struct device_node* np, struct property* prop)
-{
- struct property **next;
-
- prop->next = NULL;
- write_lock(&devtree_lock);
- next = &np->properties;
- while (*next) {
- if (strcmp(prop->name, (*next)->name) == 0) {
- /* duplicate ! don't insert it */
- write_unlock(&devtree_lock);
- return -1;
- }
- next = &(*next)->next;
- }
- *next = prop;
- write_unlock(&devtree_lock);
-
- /* try to add to proc as well if it was initialized */
- if (np->pde)
- proc_device_tree_add_prop(np->pde, prop);
-
- return 0;
-}
-
-#if 0
-void
-print_properties(struct device_node *np)
-{
- struct property *pp;
- char *cp;
- int i, n;
-
- for (pp = np->properties; pp != 0; pp = pp->next) {
- printk(KERN_INFO "%s", pp->name);
- for (i = strlen(pp->name); i < 16; ++i)
- printk(" ");
- cp = (char *) pp->value;
- for (i = pp->length; i > 0; --i, ++cp)
- if ((i > 1 && (*cp < 0x20 || *cp > 0x7e))
- || (i == 1 && *cp != 0))
- break;
- if (i == 0 && pp->length > 1) {
- /* looks like a string */
- printk(" %s\n", (char *) pp->value);
- } else {
- /* dump it in hex */
- n = pp->length;
- if (n > 64)
- n = 64;
- if (pp->length % 4 == 0) {
- unsigned int *p = (unsigned int *) pp->value;
-
- n /= 4;
- for (i = 0; i < n; ++i) {
- if (i != 0 && (i % 4) == 0)
- printk("\n ");
- printk(" %08x", *p++);
- }
- } else {
- unsigned char *bp = pp->value;
-
- for (i = 0; i < n; ++i) {
- if (i != 0 && (i % 16) == 0)
- printk("\n ");
- printk(" %02x", *bp++);
- }
- }
- printk("\n");
- if (pp->length > 64)
- printk(" ... (length = %d)\n",
- pp->length);
- }
- }
-}
-#endif
-
-
-
-
-
-
-
-
-
-
+++ /dev/null
-/*
- *
- *
- * Procedures for interfacing to Open Firmware.
- *
- * Paul Mackerras August 1996.
- * Copyright (C) 1996 Paul Mackerras.
- *
- * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
- * {engebret|bergner}@us.ibm.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#undef DEBUG_PROM
-
-#include <stdarg.h>
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/threads.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/proc_fs.h>
-#include <linux/stringify.h>
-#include <linux/delay.h>
-#include <linux/initrd.h>
-#include <linux/bitops.h>
-#include <asm/prom.h>
-#include <asm/rtas.h>
-#include <asm/abs_addr.h>
-#include <asm/page.h>
-#include <asm/processor.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/smp.h>
-#include <asm/system.h>
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-#include <asm/pci.h>
-#include <asm/iommu.h>
-#include <asm/btext.h>
-#include <asm/sections.h>
-#include <asm/machdep.h>
-
-#ifdef CONFIG_LOGO_LINUX_CLUT224
-#include <linux/linux_logo.h>
-extern const struct linux_logo logo_linux_clut224;
-#endif
-
-/*
- * Properties whose value is longer than this get excluded from our
- * copy of the device tree. This value does need to be big enough to
- * ensure that we don't lose things like the interrupt-map property
- * on a PCI-PCI bridge.
- */
-#define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
-
-/*
- * Eventually bump that one up
- */
-#define DEVTREE_CHUNK_SIZE 0x100000
-
-/*
- * This is the size of the local memory reserve map that gets copied
- * into the boot params passed to the kernel. That size is totally
- * flexible as the kernel just reads the list until it encounters an
- * entry with size 0, so it can be changed without breaking binary
- * compatibility
- */
-#define MEM_RESERVE_MAP_SIZE 8
-
-/*
- * prom_init() is called very early on, before the kernel text
- * and data have been mapped to KERNELBASE. At this point the code
- * is running at whatever address it has been loaded at, so
- * references to extern and static variables must be relocated
- * explicitly. The procedure reloc_offset() returns the address
- * we're currently running at minus the address we were linked at.
- * (Note that strings count as static variables.)
- *
- * Because OF may have mapped I/O devices into the area starting at
- * KERNELBASE, particularly on CHRP machines, we can't safely call
- * OF once the kernel has been mapped to KERNELBASE. Therefore all
- * OF calls should be done within prom_init(), and prom_init()
- * and all routines called within it must be careful to relocate
- * references as necessary.
- *
- * Note that the bss is cleared *after* prom_init runs, so we have
- * to make sure that any static or extern variables it accesses
- * are put in the data segment.
- */
-
-
-#define PROM_BUG() do { \
- prom_printf("kernel BUG at %s line 0x%x!\n", \
- RELOC(__FILE__), __LINE__); \
- __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
-} while (0)
-
-#ifdef DEBUG_PROM
-#define prom_debug(x...) prom_printf(x)
-#else
-#define prom_debug(x...)
-#endif
-
-
-typedef u32 prom_arg_t;
-
-struct prom_args {
- u32 service;
- u32 nargs;
- u32 nret;
- prom_arg_t args[10];
- prom_arg_t *rets; /* Pointer to return values in args[16]. */
-};
-
-struct prom_t {
- unsigned long entry;
- ihandle root;
- ihandle chosen;
- int cpu;
- ihandle stdout;
- ihandle disp_node;
- struct prom_args args;
- unsigned long version;
- unsigned long root_size_cells;
- unsigned long root_addr_cells;
-};
-
-struct pci_reg_property {
- struct pci_address addr;
- u32 size_hi;
- u32 size_lo;
-};
-
-struct mem_map_entry {
- u64 base;
- u64 size;
-};
-
-typedef u32 cell_t;
-
-extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
-
-extern void enter_prom(struct prom_args *args, unsigned long entry);
-extern void copy_and_flush(unsigned long dest, unsigned long src,
- unsigned long size, unsigned long offset);
-
-extern unsigned long klimit;
-
-/* prom structure */
-static struct prom_t __initdata prom;
-
-#define PROM_SCRATCH_SIZE 256
-
-static char __initdata of_stdout_device[256];
-static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
-
-static unsigned long __initdata dt_header_start;
-static unsigned long __initdata dt_struct_start, dt_struct_end;
-static unsigned long __initdata dt_string_start, dt_string_end;
-
-static unsigned long __initdata prom_initrd_start, prom_initrd_end;
-
-static int __initdata iommu_force_on;
-static int __initdata ppc64_iommu_off;
-static int __initdata of_platform;
-
-static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
-
-static unsigned long __initdata prom_memory_limit;
-static unsigned long __initdata prom_tce_alloc_start;
-static unsigned long __initdata prom_tce_alloc_end;
-
-static unsigned long __initdata alloc_top;
-static unsigned long __initdata alloc_top_high;
-static unsigned long __initdata alloc_bottom;
-static unsigned long __initdata rmo_top;
-static unsigned long __initdata ram_top;
-
-static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
-static int __initdata mem_reserve_cnt;
-
-static cell_t __initdata regbuf[1024];
-
-
-#define MAX_CPU_THREADS 2
-
-/* TO GO */
-#ifdef CONFIG_HMT
-struct {
- unsigned int pir;
- unsigned int threadid;
-} hmt_thread_data[NR_CPUS];
-#endif /* CONFIG_HMT */
-
-/*
- * This are used in calls to call_prom. The 4th and following
- * arguments to call_prom should be 32-bit values. 64 bit values
- * are truncated to 32 bits (and fortunately don't get interpreted
- * as two arguments).
- */
-#define ADDR(x) (u32) ((unsigned long)(x) - offset)
-
-/*
- * Error results ... some OF calls will return "-1" on error, some
- * will return 0, some will return either. To simplify, here are
- * macros to use with any ihandle or phandle return value to check if
- * it is valid
- */
-
-#define PROM_ERROR (-1u)
-#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
-#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
-
-
-/* This is the one and *ONLY* place where we actually call open
- * firmware from, since we need to make sure we're running in 32b
- * mode when we do. We switch back to 64b mode upon return.
- */
-
-static int __init call_prom(const char *service, int nargs, int nret, ...)
-{
- int i;
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- va_list list;
-
- _prom->args.service = ADDR(service);
- _prom->args.nargs = nargs;
- _prom->args.nret = nret;
- _prom->args.rets = (prom_arg_t *)&(_prom->args.args[nargs]);
-
- va_start(list, nret);
- for (i=0; i < nargs; i++)
- _prom->args.args[i] = va_arg(list, prom_arg_t);
- va_end(list);
-
- for (i=0; i < nret ;i++)
- _prom->args.rets[i] = 0;
-
- enter_prom(&_prom->args, _prom->entry);
-
- return (nret > 0) ? _prom->args.rets[0] : 0;
-}
-
-
-static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
- unsigned long align)
-{
- return (unsigned int)call_prom("claim", 3, 1,
- (prom_arg_t)virt, (prom_arg_t)size,
- (prom_arg_t)align);
-}
-
-static void __init prom_print(const char *msg)
-{
- const char *p, *q;
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- if (_prom->stdout == 0)
- return;
-
- for (p = msg; *p != 0; p = q) {
- for (q = p; *q != 0 && *q != '\n'; ++q)
- ;
- if (q > p)
- call_prom("write", 3, 1, _prom->stdout, p, q - p);
- if (*q == 0)
- break;
- ++q;
- call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
- }
-}
-
-
-static void __init prom_print_hex(unsigned long val)
-{
- unsigned long offset = reloc_offset();
- int i, nibbles = sizeof(val)*2;
- char buf[sizeof(val)*2+1];
- struct prom_t *_prom = PTRRELOC(&prom);
-
- for (i = nibbles-1; i >= 0; i--) {
- buf[i] = (val & 0xf) + '0';
- if (buf[i] > '9')
- buf[i] += ('a'-'0'-10);
- val >>= 4;
- }
- buf[nibbles] = '\0';
- call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
-}
-
-
-static void __init prom_printf(const char *format, ...)
-{
- unsigned long offset = reloc_offset();
- const char *p, *q, *s;
- va_list args;
- unsigned long v;
- struct prom_t *_prom = PTRRELOC(&prom);
-
- va_start(args, format);
- for (p = PTRRELOC(format); *p != 0; p = q) {
- for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
- ;
- if (q > p)
- call_prom("write", 3, 1, _prom->stdout, p, q - p);
- if (*q == 0)
- break;
- if (*q == '\n') {
- ++q;
- call_prom("write", 3, 1, _prom->stdout,
- ADDR("\r\n"), 2);
- continue;
- }
- ++q;
- if (*q == 0)
- break;
- switch (*q) {
- case 's':
- ++q;
- s = va_arg(args, const char *);
- prom_print(s);
- break;
- case 'x':
- ++q;
- v = va_arg(args, unsigned long);
- prom_print_hex(v);
- break;
- }
- }
-}
-
-
-static void __init __attribute__((noreturn)) prom_panic(const char *reason)
-{
- unsigned long offset = reloc_offset();
-
- prom_print(PTRRELOC(reason));
- /* ToDo: should put up an SRC here */
- call_prom("exit", 0, 0);
-
- for (;;) /* should never get here */
- ;
-}
-
-
-static int __init prom_next_node(phandle *nodep)
-{
- phandle node;
-
- if ((node = *nodep) != 0
- && (*nodep = call_prom("child", 1, 1, node)) != 0)
- return 1;
- if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
- return 1;
- for (;;) {
- if ((node = call_prom("parent", 1, 1, node)) == 0)
- return 0;
- if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
- return 1;
- }
-}
-
-static int __init prom_getprop(phandle node, const char *pname,
- void *value, size_t valuelen)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("getprop", 4, 1, node, ADDR(pname),
- (u32)(unsigned long) value, (u32) valuelen);
-}
-
-static int __init prom_getproplen(phandle node, const char *pname)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("getproplen", 2, 1, node, ADDR(pname));
-}
-
-static int __init prom_setprop(phandle node, const char *pname,
- void *value, size_t valuelen)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("setprop", 4, 1, node, ADDR(pname),
- (u32)(unsigned long) value, (u32) valuelen);
-}
-
-/* We can't use the standard versions because of RELOC headaches. */
-#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
- || ('a' <= (c) && (c) <= 'f') \
- || ('A' <= (c) && (c) <= 'F'))
-
-#define isdigit(c) ('0' <= (c) && (c) <= '9')
-#define islower(c) ('a' <= (c) && (c) <= 'z')
-#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
-
-unsigned long prom_strtoul(const char *cp, const char **endp)
-{
- unsigned long result = 0, base = 10, value;
-
- if (*cp == '0') {
- base = 8;
- cp++;
- if (toupper(*cp) == 'X') {
- cp++;
- base = 16;
- }
- }
-
- while (isxdigit(*cp) &&
- (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
- result = result * base + value;
- cp++;
- }
-
- if (endp)
- *endp = cp;
-
- return result;
-}
-
-unsigned long prom_memparse(const char *ptr, const char **retptr)
-{
- unsigned long ret = prom_strtoul(ptr, retptr);
- int shift = 0;
-
- /*
- * We can't use a switch here because GCC *may* generate a
- * jump table which won't work, because we're not running at
- * the address we're linked at.
- */
- if ('G' == **retptr || 'g' == **retptr)
- shift = 30;
-
- if ('M' == **retptr || 'm' == **retptr)
- shift = 20;
-
- if ('K' == **retptr || 'k' == **retptr)
- shift = 10;
-
- if (shift) {
- ret <<= shift;
- (*retptr)++;
- }
-
- return ret;
-}
-
-/*
- * Early parsing of the command line passed to the kernel, used for
- * "mem=x" and the options that affect the iommu
- */
-static void __init early_cmdline_parse(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char *opt, *p;
- int l = 0;
-
- RELOC(prom_cmd_line[0]) = 0;
- p = RELOC(prom_cmd_line);
- if ((long)_prom->chosen > 0)
- l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
-#ifdef CONFIG_CMDLINE
- if (l == 0) /* dbl check */
- strlcpy(RELOC(prom_cmd_line),
- RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
-#endif /* CONFIG_CMDLINE */
- prom_printf("command line: %s\n", RELOC(prom_cmd_line));
-
- opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
- if (opt) {
- prom_printf("iommu opt is: %s\n", opt);
- opt += 6;
- while (*opt && *opt == ' ')
- opt++;
- if (!strncmp(opt, RELOC("off"), 3))
- RELOC(ppc64_iommu_off) = 1;
- else if (!strncmp(opt, RELOC("force"), 5))
- RELOC(iommu_force_on) = 1;
- }
-
- opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
- if (opt) {
- opt += 4;
- RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
- /* Align to 16 MB == size of large page */
- RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
- }
-}
-
-/*
- * To tell the firmware what our capabilities are, we have to pass
- * it a fake 32-bit ELF header containing a couple of PT_NOTE sections
- * that contain structures that contain the actual values.
- */
-static struct fake_elf {
- Elf32_Ehdr elfhdr;
- Elf32_Phdr phdr[2];
- struct chrpnote {
- u32 namesz;
- u32 descsz;
- u32 type;
- char name[8]; /* "PowerPC" */
- struct chrpdesc {
- u32 real_mode;
- u32 real_base;
- u32 real_size;
- u32 virt_base;
- u32 virt_size;
- u32 load_base;
- } chrpdesc;
- } chrpnote;
- struct rpanote {
- u32 namesz;
- u32 descsz;
- u32 type;
- char name[24]; /* "IBM,RPA-Client-Config" */
- struct rpadesc {
- u32 lpar_affinity;
- u32 min_rmo_size;
- u32 min_rmo_percent;
- u32 max_pft_size;
- u32 splpar;
- u32 min_load;
- u32 new_mem_def;
- u32 ignore_me;
- } rpadesc;
- } rpanote;
-} fake_elf = {
- .elfhdr = {
- .e_ident = { 0x7f, 'E', 'L', 'F',
- ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
- .e_type = ET_EXEC, /* yeah right */
- .e_machine = EM_PPC,
- .e_version = EV_CURRENT,
- .e_phoff = offsetof(struct fake_elf, phdr),
- .e_phentsize = sizeof(Elf32_Phdr),
- .e_phnum = 2
- },
- .phdr = {
- [0] = {
- .p_type = PT_NOTE,
- .p_offset = offsetof(struct fake_elf, chrpnote),
- .p_filesz = sizeof(struct chrpnote)
- }, [1] = {
- .p_type = PT_NOTE,
- .p_offset = offsetof(struct fake_elf, rpanote),
- .p_filesz = sizeof(struct rpanote)
- }
- },
- .chrpnote = {
- .namesz = sizeof("PowerPC"),
- .descsz = sizeof(struct chrpdesc),
- .type = 0x1275,
- .name = "PowerPC",
- .chrpdesc = {
- .real_mode = ~0U, /* ~0 means "don't care" */
- .real_base = ~0U,
- .real_size = ~0U,
- .virt_base = ~0U,
- .virt_size = ~0U,
- .load_base = ~0U
- },
- },
- .rpanote = {
- .namesz = sizeof("IBM,RPA-Client-Config"),
- .descsz = sizeof(struct rpadesc),
- .type = 0x12759999,
- .name = "IBM,RPA-Client-Config",
- .rpadesc = {
- .lpar_affinity = 0,
- .min_rmo_size = 64, /* in megabytes */
- .min_rmo_percent = 0,
- .max_pft_size = 48, /* 2^48 bytes max PFT size */
- .splpar = 1,
- .min_load = ~0U,
- .new_mem_def = 0
- }
- }
-};
-
-static void __init prom_send_capabilities(void)
-{
- unsigned long offset = reloc_offset();
- ihandle elfloader;
-
- elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
- if (elfloader == 0) {
- prom_printf("couldn't open /packages/elf-loader\n");
- return;
- }
- call_prom("call-method", 3, 1, ADDR("process-elf-header"),
- elfloader, ADDR(&fake_elf));
- call_prom("close", 1, 0, elfloader);
-}
-
-/*
- * Memory allocation strategy... our layout is normally:
- *
- * at 14Mb or more we vmlinux, then a gap and initrd. In some rare cases, initrd
- * might end up beeing before the kernel though. We assume this won't override
- * the final kernel at 0, we have no provision to handle that in this version,
- * but it should hopefully never happen.
- *
- * alloc_top is set to the top of RMO, eventually shrink down if the TCEs overlap
- * alloc_bottom is set to the top of kernel/initrd
- *
- * from there, allocations are done that way : rtas is allocated topmost, and
- * the device-tree is allocated from the bottom. We try to grow the device-tree
- * allocation as we progress. If we can't, then we fail, we don't currently have
- * a facility to restart elsewhere, but that shouldn't be necessary neither
- *
- * Note that calls to reserve_mem have to be done explicitely, memory allocated
- * with either alloc_up or alloc_down isn't automatically reserved.
- */
-
-
-/*
- * Allocates memory in the RMO upward from the kernel/initrd
- *
- * When align is 0, this is a special case, it means to allocate in place
- * at the current location of alloc_bottom or fail (that is basically
- * extending the previous allocation). Used for the device-tree flattening
- */
-static unsigned long __init alloc_up(unsigned long size, unsigned long align)
-{
- unsigned long offset = reloc_offset();
- unsigned long base = _ALIGN_UP(RELOC(alloc_bottom), align);
- unsigned long addr = 0;
-
- prom_debug("alloc_up(%x, %x)\n", size, align);
- if (RELOC(ram_top) == 0)
- prom_panic("alloc_up() called with mem not initialized\n");
-
- if (align)
- base = _ALIGN_UP(RELOC(alloc_bottom), align);
- else
- base = RELOC(alloc_bottom);
-
- for(; (base + size) <= RELOC(alloc_top);
- base = _ALIGN_UP(base + 0x100000, align)) {
- prom_debug(" trying: 0x%x\n\r", base);
- addr = (unsigned long)prom_claim(base, size, 0);
- if (addr != PROM_ERROR)
- break;
- addr = 0;
- if (align == 0)
- break;
- }
- if (addr == 0)
- return 0;
- RELOC(alloc_bottom) = addr;
-
- prom_debug(" -> %x\n", addr);
- prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
- prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
- prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
- prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
- prom_debug(" ram_top : %x\n", RELOC(ram_top));
-
- return addr;
-}
-
-/*
- * Allocates memory downard, either from top of RMO, or if highmem
- * is set, from the top of RAM. Note that this one doesn't handle
- * failures. In does claim memory if highmem is not set.
- */
-static unsigned long __init alloc_down(unsigned long size, unsigned long align,
- int highmem)
-{
- unsigned long offset = reloc_offset();
- unsigned long base, addr = 0;
-
- prom_debug("alloc_down(%x, %x, %s)\n", size, align,
- highmem ? RELOC("(high)") : RELOC("(low)"));
- if (RELOC(ram_top) == 0)
- prom_panic("alloc_down() called with mem not initialized\n");
-
- if (highmem) {
- /* Carve out storage for the TCE table. */
- addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
- if (addr <= RELOC(alloc_bottom))
- return 0;
- else {
- /* Will we bump into the RMO ? If yes, check out that we
- * didn't overlap existing allocations there, if we did,
- * we are dead, we must be the first in town !
- */
- if (addr < RELOC(rmo_top)) {
- /* Good, we are first */
- if (RELOC(alloc_top) == RELOC(rmo_top))
- RELOC(alloc_top) = RELOC(rmo_top) = addr;
- else
- return 0;
- }
- RELOC(alloc_top_high) = addr;
- }
- goto bail;
- }
-
- base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
- for(; base > RELOC(alloc_bottom); base = _ALIGN_DOWN(base - 0x100000, align)) {
- prom_debug(" trying: 0x%x\n\r", base);
- addr = (unsigned long)prom_claim(base, size, 0);
- if (addr != PROM_ERROR)
- break;
- addr = 0;
- }
- if (addr == 0)
- return 0;
- RELOC(alloc_top) = addr;
-
- bail:
- prom_debug(" -> %x\n", addr);
- prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
- prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
- prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
- prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
- prom_debug(" ram_top : %x\n", RELOC(ram_top));
-
- return addr;
-}
-
-/*
- * Parse a "reg" cell
- */
-static unsigned long __init prom_next_cell(int s, cell_t **cellp)
-{
- cell_t *p = *cellp;
- unsigned long r = 0;
-
- /* Ignore more than 2 cells */
- while (s > 2) {
- p++;
- s--;
- }
- while (s) {
- r <<= 32;
- r |= *(p++);
- s--;
- }
-
- *cellp = p;
- return r;
-}
-
-/*
- * Very dumb function for adding to the memory reserve list, but
- * we don't need anything smarter at this point
- *
- * XXX Eventually check for collisions. They should NEVER happen
- * if problems seem to show up, it would be a good start to track
- * them down.
- */
-static void reserve_mem(unsigned long base, unsigned long size)
-{
- unsigned long offset = reloc_offset();
- unsigned long top = base + size;
- unsigned long cnt = RELOC(mem_reserve_cnt);
-
- if (size == 0)
- return;
-
- /* We need to always keep one empty entry so that we
- * have our terminator with "size" set to 0 since we are
- * dumb and just copy this entire array to the boot params
- */
- base = _ALIGN_DOWN(base, PAGE_SIZE);
- top = _ALIGN_UP(top, PAGE_SIZE);
- size = top - base;
-
- if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
- prom_panic("Memory reserve map exhausted !\n");
- RELOC(mem_reserve_map)[cnt].base = base;
- RELOC(mem_reserve_map)[cnt].size = size;
- RELOC(mem_reserve_cnt) = cnt + 1;
-}
-
-/*
- * Initialize memory allocation mecanism, parse "memory" nodes and
- * obtain that way the top of memory and RMO to setup out local allocator
- */
-static void __init prom_init_mem(void)
-{
- phandle node;
- char *path, type[64];
- unsigned int plen;
- cell_t *p, *endp;
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- /*
- * We iterate the memory nodes to find
- * 1) top of RMO (first node)
- * 2) top of memory
- */
- prom_debug("root_addr_cells: %x\n", (long)_prom->root_addr_cells);
- prom_debug("root_size_cells: %x\n", (long)_prom->root_size_cells);
-
- prom_debug("scanning memory:\n");
- path = RELOC(prom_scratch);
-
- for (node = 0; prom_next_node(&node); ) {
- type[0] = 0;
- prom_getprop(node, "device_type", type, sizeof(type));
-
- if (strcmp(type, RELOC("memory")))
- continue;
-
- plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
- if (plen > sizeof(regbuf)) {
- prom_printf("memory node too large for buffer !\n");
- plen = sizeof(regbuf);
- }
- p = RELOC(regbuf);
- endp = p + (plen / sizeof(cell_t));
-
-#ifdef DEBUG_PROM
- memset(path, 0, PROM_SCRATCH_SIZE);
- call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
- prom_debug(" node %s :\n", path);
-#endif /* DEBUG_PROM */
-
- while ((endp - p) >= (_prom->root_addr_cells + _prom->root_size_cells)) {
- unsigned long base, size;
-
- base = prom_next_cell(_prom->root_addr_cells, &p);
- size = prom_next_cell(_prom->root_size_cells, &p);
-
- if (size == 0)
- continue;
- prom_debug(" %x %x\n", base, size);
- if (base == 0)
- RELOC(rmo_top) = size;
- if ((base + size) > RELOC(ram_top))
- RELOC(ram_top) = base + size;
- }
- }
-
- RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(klimit) - offset + 0x4000);
-
- /* Check if we have an initrd after the kernel, if we do move our bottom
- * point to after it
- */
- if (RELOC(prom_initrd_start)) {
- if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
- RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
- }
-
- /*
- * If prom_memory_limit is set we reduce the upper limits *except* for
- * alloc_top_high. This must be the real top of RAM so we can put
- * TCE's up there.
- */
-
- RELOC(alloc_top_high) = RELOC(ram_top);
-
- if (RELOC(prom_memory_limit)) {
- if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
- prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
- RELOC(prom_memory_limit));
- RELOC(prom_memory_limit) = 0;
- } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
- prom_printf("Ignoring mem=%x >= ram_top.\n",
- RELOC(prom_memory_limit));
- RELOC(prom_memory_limit) = 0;
- } else {
- RELOC(ram_top) = RELOC(prom_memory_limit);
- RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
- }
- }
-
- /*
- * Setup our top alloc point, that is top of RMO or top of
- * segment 0 when running non-LPAR.
- */
- if ( RELOC(of_platform) == PLATFORM_PSERIES_LPAR )
- RELOC(alloc_top) = RELOC(rmo_top);
- else
- /* Some RS64 machines have buggy firmware where claims up at 1GB
- * fails. Cap at 768MB as a workaround. Still plenty of room.
- */
- RELOC(alloc_top) = RELOC(rmo_top) = min(0x30000000ul, RELOC(ram_top));
-
- prom_printf("memory layout at init:\n");
- prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
- prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
- prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
- prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
- prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
- prom_printf(" ram_top : %x\n", RELOC(ram_top));
-}
-
-
-/*
- * Allocate room for and instanciate RTAS
- */
-static void __init prom_instantiate_rtas(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- phandle rtas_node;
- ihandle rtas_inst;
- u32 base, entry = 0;
- u32 size = 0;
-
- prom_debug("prom_instantiate_rtas: start...\n");
-
- rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
- prom_debug("rtas_node: %x\n", rtas_node);
- if (!PHANDLE_VALID(rtas_node))
- return;
-
- prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
- if (size == 0)
- return;
-
- base = alloc_down(size, PAGE_SIZE, 0);
- if (base == 0) {
- prom_printf("RTAS allocation failed !\n");
- return;
- }
-
- rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
- if (!IHANDLE_VALID(rtas_inst)) {
- prom_printf("opening rtas package failed");
- return;
- }
-
- prom_printf("instantiating rtas at 0x%x ...", base);
-
- if (call_prom("call-method", 3, 2,
- ADDR("instantiate-rtas"),
- rtas_inst, base) != PROM_ERROR) {
- entry = (long)_prom->args.rets[1];
- }
- if (entry == 0) {
- prom_printf(" failed\n");
- return;
- }
- prom_printf(" done\n");
-
- reserve_mem(base, size);
-
- prom_setprop(rtas_node, "linux,rtas-base", &base, sizeof(base));
- prom_setprop(rtas_node, "linux,rtas-entry", &entry, sizeof(entry));
-
- prom_debug("rtas base = 0x%x\n", base);
- prom_debug("rtas entry = 0x%x\n", entry);
- prom_debug("rtas size = 0x%x\n", (long)size);
-
- prom_debug("prom_instantiate_rtas: end...\n");
-}
-
-
-/*
- * Allocate room for and initialize TCE tables
- */
-static void __init prom_initialize_tce_table(void)
-{
- phandle node;
- ihandle phb_node;
- unsigned long offset = reloc_offset();
- char compatible[64], type[64], model[64];
- char *path = RELOC(prom_scratch);
- u64 base, align;
- u32 minalign, minsize;
- u64 tce_entry, *tce_entryp;
- u64 local_alloc_top, local_alloc_bottom;
- u64 i;
-
- if (RELOC(ppc64_iommu_off))
- return;
-
- prom_debug("starting prom_initialize_tce_table\n");
-
- /* Cache current top of allocs so we reserve a single block */
- local_alloc_top = RELOC(alloc_top_high);
- local_alloc_bottom = local_alloc_top;
-
- /* Search all nodes looking for PHBs. */
- for (node = 0; prom_next_node(&node); ) {
- compatible[0] = 0;
- type[0] = 0;
- model[0] = 0;
- prom_getprop(node, "compatible",
- compatible, sizeof(compatible));
- prom_getprop(node, "device_type", type, sizeof(type));
- prom_getprop(node, "model", model, sizeof(model));
-
- if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
- continue;
-
- /* Keep the old logic in tack to avoid regression. */
- if (compatible[0] != 0) {
- if ((strstr(compatible, RELOC("python")) == NULL) &&
- (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
- (strstr(compatible, RELOC("Winnipeg")) == NULL))
- continue;
- } else if (model[0] != 0) {
- if ((strstr(model, RELOC("ython")) == NULL) &&
- (strstr(model, RELOC("peedwagon")) == NULL) &&
- (strstr(model, RELOC("innipeg")) == NULL))
- continue;
- }
-
- if (prom_getprop(node, "tce-table-minalign", &minalign,
- sizeof(minalign)) == PROM_ERROR)
- minalign = 0;
- if (prom_getprop(node, "tce-table-minsize", &minsize,
- sizeof(minsize)) == PROM_ERROR)
- minsize = 4UL << 20;
-
- /*
- * Even though we read what OF wants, we just set the table
- * size to 4 MB. This is enough to map 2GB of PCI DMA space.
- * By doing this, we avoid the pitfalls of trying to DMA to
- * MMIO space and the DMA alias hole.
- *
- * On POWER4, firmware sets the TCE region by assuming
- * each TCE table is 8MB. Using this memory for anything
- * else will impact performance, so we always allocate 8MB.
- * Anton
- */
- if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
- minsize = 8UL << 20;
- else
- minsize = 4UL << 20;
-
- /* Align to the greater of the align or size */
- align = max(minalign, minsize);
- base = alloc_down(minsize, align, 1);
- if (base == 0)
- prom_panic("ERROR, cannot find space for TCE table.\n");
- if (base < local_alloc_bottom)
- local_alloc_bottom = base;
-
- /* Save away the TCE table attributes for later use. */
- prom_setprop(node, "linux,tce-base", &base, sizeof(base));
- prom_setprop(node, "linux,tce-size", &minsize, sizeof(minsize));
-
- /* It seems OF doesn't null-terminate the path :-( */
- memset(path, 0, sizeof(path));
- /* Call OF to setup the TCE hardware */
- if (call_prom("package-to-path", 3, 1, node,
- path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
- prom_printf("package-to-path failed\n");
- }
-
- prom_debug("TCE table: %s\n", path);
- prom_debug("\tnode = 0x%x\n", node);
- prom_debug("\tbase = 0x%x\n", base);
- prom_debug("\tsize = 0x%x\n", minsize);
-
- /* Initialize the table to have a one-to-one mapping
- * over the allocated size.
- */
- tce_entryp = (unsigned long *)base;
- for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
- tce_entry = (i << PAGE_SHIFT);
- tce_entry |= 0x3;
- *tce_entryp = tce_entry;
- }
-
- prom_printf("opening PHB %s", path);
- phb_node = call_prom("open", 1, 1, path);
- if (phb_node == 0)
- prom_printf("... failed\n");
- else
- prom_printf("... done\n");
-
- call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
- phb_node, -1, minsize,
- (u32) base, (u32) (base >> 32));
- call_prom("close", 1, 0, phb_node);
- }
-
- reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
-
- if (RELOC(prom_memory_limit)) {
- /*
- * We align the start to a 16MB boundary so we can map the TCE area
- * using large pages if possible. The end should be the top of RAM
- * so no need to align it.
- */
- RELOC(prom_tce_alloc_start) = _ALIGN_DOWN(local_alloc_bottom, 0x1000000);
- RELOC(prom_tce_alloc_end) = local_alloc_top;
- }
-
- /* Flag the first invalid entry */
- prom_debug("ending prom_initialize_tce_table\n");
-}
-
-/*
- * With CHRP SMP we need to use the OF to start the other
- * processors so we can't wait until smp_boot_cpus (the OF is
- * trashed by then) so we have to put the processors into
- * a holding pattern controlled by the kernel (not OF) before
- * we destroy the OF.
- *
- * This uses a chunk of low memory, puts some holding pattern
- * code there and sends the other processors off to there until
- * smp_boot_cpus tells them to do something. The holding pattern
- * checks that address until its cpu # is there, when it is that
- * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
- * of setting those values.
- *
- * We also use physical address 0x4 here to tell when a cpu
- * is in its holding pattern code.
- *
- * Fixup comment... DRENG / PPPBBB - Peter
- *
- * -- Cort
- */
-static void __init prom_hold_cpus(void)
-{
- unsigned long i;
- unsigned int reg;
- phandle node;
- unsigned long offset = reloc_offset();
- char type[64];
- int cpuid = 0;
- unsigned int interrupt_server[MAX_CPU_THREADS];
- unsigned int cpu_threads, hw_cpu_num;
- int propsize;
- extern void __secondary_hold(void);
- extern unsigned long __secondary_hold_spinloop;
- extern unsigned long __secondary_hold_acknowledge;
- unsigned long *spinloop
- = (void *)virt_to_abs(&__secondary_hold_spinloop);
- unsigned long *acknowledge
- = (void *)virt_to_abs(&__secondary_hold_acknowledge);
- unsigned long secondary_hold
- = virt_to_abs(*PTRRELOC((unsigned long *)__secondary_hold));
- struct prom_t *_prom = PTRRELOC(&prom);
-
- prom_debug("prom_hold_cpus: start...\n");
- prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
- prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
- prom_debug(" 1) acknowledge = 0x%x\n",
- (unsigned long)acknowledge);
- prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
- prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
-
- /* Set the common spinloop variable, so all of the secondary cpus
- * will block when they are awakened from their OF spinloop.
- * This must occur for both SMP and non SMP kernels, since OF will
- * be trashed when we move the kernel.
- */
- *spinloop = 0;
-
-#ifdef CONFIG_HMT
- for (i=0; i < NR_CPUS; i++) {
- RELOC(hmt_thread_data)[i].pir = 0xdeadbeef;
- }
-#endif
- /* look for cpus */
- for (node = 0; prom_next_node(&node); ) {
- type[0] = 0;
- prom_getprop(node, "device_type", type, sizeof(type));
- if (strcmp(type, RELOC("cpu")) != 0)
- continue;
-
- /* Skip non-configured cpus. */
- if (prom_getprop(node, "status", type, sizeof(type)) > 0)
- if (strcmp(type, RELOC("okay")) != 0)
- continue;
-
- reg = -1;
- prom_getprop(node, "reg", ®, sizeof(reg));
-
- prom_debug("\ncpuid = 0x%x\n", cpuid);
- prom_debug("cpu hw idx = 0x%x\n", reg);
-
- /* Init the acknowledge var which will be reset by
- * the secondary cpu when it awakens from its OF
- * spinloop.
- */
- *acknowledge = (unsigned long)-1;
-
- propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s",
- &interrupt_server,
- sizeof(interrupt_server));
- if (propsize < 0) {
- /* no property. old hardware has no SMT */
- cpu_threads = 1;
- interrupt_server[0] = reg; /* fake it with phys id */
- } else {
- /* We have a threaded processor */
- cpu_threads = propsize / sizeof(u32);
- if (cpu_threads > MAX_CPU_THREADS) {
- prom_printf("SMT: too many threads!\n"
- "SMT: found %x, max is %x\n",
- cpu_threads, MAX_CPU_THREADS);
- cpu_threads = 1; /* ToDo: panic? */
- }
- }
-
- hw_cpu_num = interrupt_server[0];
- if (hw_cpu_num != _prom->cpu) {
- /* Primary Thread of non-boot cpu */
- prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg);
- call_prom("start-cpu", 3, 0, node,
- secondary_hold, reg);
-
- for ( i = 0 ; (i < 100000000) &&
- (*acknowledge == ((unsigned long)-1)); i++ )
- mb();
-
- if (*acknowledge == reg) {
- prom_printf("done\n");
- /* We have to get every CPU out of OF,
- * even if we never start it. */
- if (cpuid >= NR_CPUS)
- goto next;
- } else {
- prom_printf("failed: %x\n", *acknowledge);
- }
- }
-#ifdef CONFIG_SMP
- else
- prom_printf("%x : boot cpu %x\n", cpuid, reg);
-#endif
-next:
-#ifdef CONFIG_SMP
- /* Init paca for secondary threads. They start later. */
- for (i=1; i < cpu_threads; i++) {
- cpuid++;
- if (cpuid >= NR_CPUS)
- continue;
- }
-#endif /* CONFIG_SMP */
- cpuid++;
- }
-#ifdef CONFIG_HMT
- /* Only enable HMT on processors that provide support. */
- if (__is_processor(PV_PULSAR) ||
- __is_processor(PV_ICESTAR) ||
- __is_processor(PV_SSTAR)) {
- prom_printf(" starting secondary threads\n");
-
- for (i = 0; i < NR_CPUS; i += 2) {
- if (!cpu_online(i))
- continue;
-
- if (i == 0) {
- unsigned long pir = mfspr(SPRN_PIR);
- if (__is_processor(PV_PULSAR)) {
- RELOC(hmt_thread_data)[i].pir =
- pir & 0x1f;
- } else {
- RELOC(hmt_thread_data)[i].pir =
- pir & 0x3ff;
- }
- }
- }
- } else {
- prom_printf("Processor is not HMT capable\n");
- }
-#endif
-
- if (cpuid > NR_CPUS)
- prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
- ") exceeded: ignoring extras\n");
-
- prom_debug("prom_hold_cpus: end...\n");
-}
-
-
-static void __init prom_init_client_services(unsigned long pp)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- /* Get a handle to the prom entry point before anything else */
- _prom->entry = pp;
-
- /* Init default value for phys size */
- _prom->root_size_cells = 1;
- _prom->root_addr_cells = 2;
-
- /* get a handle for the stdout device */
- _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
- if (!PHANDLE_VALID(_prom->chosen))
- prom_panic("cannot find chosen"); /* msg won't be printed :( */
-
- /* get device tree root */
- _prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
- if (!PHANDLE_VALID(_prom->root))
- prom_panic("cannot find device tree root"); /* msg won't be printed :( */
-}
-
-static void __init prom_init_stdout(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char *path = RELOC(of_stdout_device);
- char type[16];
- u32 val;
-
- if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
- prom_panic("cannot find stdout");
-
- _prom->stdout = val;
-
- /* Get the full OF pathname of the stdout device */
- memset(path, 0, 256);
- call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
- val = call_prom("instance-to-package", 1, 1, _prom->stdout);
- prom_setprop(_prom->chosen, "linux,stdout-package", &val, sizeof(val));
- prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
- prom_setprop(_prom->chosen, "linux,stdout-path",
- RELOC(of_stdout_device), strlen(RELOC(of_stdout_device))+1);
-
- /* If it's a display, note it */
- memset(type, 0, sizeof(type));
- prom_getprop(val, "device_type", type, sizeof(type));
- if (strcmp(type, RELOC("display")) == 0) {
- _prom->disp_node = val;
- prom_setprop(val, "linux,boot-display", NULL, 0);
- }
-}
-
-static void __init prom_close_stdin(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- ihandle val;
-
- if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
- call_prom("close", 1, 0, val);
-}
-
-static int __init prom_find_machine_type(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char compat[256];
- int len, i = 0;
- phandle rtas;
-
- len = prom_getprop(_prom->root, "compatible",
- compat, sizeof(compat)-1);
- if (len > 0) {
- compat[len] = 0;
- while (i < len) {
- char *p = &compat[i];
- int sl = strlen(p);
- if (sl == 0)
- break;
- if (strstr(p, RELOC("Power Macintosh")) ||
- strstr(p, RELOC("MacRISC4")))
- return PLATFORM_POWERMAC;
- if (strstr(p, RELOC("Momentum,Maple")))
- return PLATFORM_MAPLE;
- i += sl + 1;
- }
- }
- /* Default to pSeries. We need to know if we are running LPAR */
- rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
- if (PHANDLE_VALID(rtas)) {
- int x = prom_getproplen(rtas, "ibm,hypertas-functions");
- if (x != PROM_ERROR) {
- prom_printf("Hypertas detected, assuming LPAR !\n");
- return PLATFORM_PSERIES_LPAR;
- }
- }
- return PLATFORM_PSERIES;
-}
-
-static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
-{
- unsigned long offset = reloc_offset();
-
- return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
-}
-
-/*
- * If we have a display that we don't know how to drive,
- * we will want to try to execute OF's open method for it
- * later. However, OF will probably fall over if we do that
- * we've taken over the MMU.
- * So we check whether we will need to open the display,
- * and if so, open it now.
- */
-static void __init prom_check_displays(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- char type[16], *path;
- phandle node;
- ihandle ih;
- int i;
-
- static unsigned char default_colors[] = {
- 0x00, 0x00, 0x00,
- 0x00, 0x00, 0xaa,
- 0x00, 0xaa, 0x00,
- 0x00, 0xaa, 0xaa,
- 0xaa, 0x00, 0x00,
- 0xaa, 0x00, 0xaa,
- 0xaa, 0xaa, 0x00,
- 0xaa, 0xaa, 0xaa,
- 0x55, 0x55, 0x55,
- 0x55, 0x55, 0xff,
- 0x55, 0xff, 0x55,
- 0x55, 0xff, 0xff,
- 0xff, 0x55, 0x55,
- 0xff, 0x55, 0xff,
- 0xff, 0xff, 0x55,
- 0xff, 0xff, 0xff
- };
- const unsigned char *clut;
-
- prom_printf("Looking for displays\n");
- for (node = 0; prom_next_node(&node); ) {
- memset(type, 0, sizeof(type));
- prom_getprop(node, "device_type", type, sizeof(type));
- if (strcmp(type, RELOC("display")) != 0)
- continue;
-
- /* It seems OF doesn't null-terminate the path :-( */
- path = RELOC(prom_scratch);
- memset(path, 0, PROM_SCRATCH_SIZE);
-
- /*
- * leave some room at the end of the path for appending extra
- * arguments
- */
- if (call_prom("package-to-path", 3, 1, node, path,
- PROM_SCRATCH_SIZE-10) == PROM_ERROR)
- continue;
- prom_printf("found display : %s, opening ... ", path);
-
- ih = call_prom("open", 1, 1, path);
- if (ih == 0) {
- prom_printf("failed\n");
- continue;
- }
-
- /* Success */
- prom_printf("done\n");
- prom_setprop(node, "linux,opened", NULL, 0);
-
- /*
- * stdout wasn't a display node, pick the first we can find
- * for btext
- */
- if (_prom->disp_node == 0)
- _prom->disp_node = node;
-
- /* Setup a useable color table when the appropriate
- * method is available. Should update this to set-colors */
- clut = RELOC(default_colors);
- for (i = 0; i < 32; i++, clut += 3)
- if (prom_set_color(ih, i, clut[0], clut[1],
- clut[2]) != 0)
- break;
-
-#ifdef CONFIG_LOGO_LINUX_CLUT224
- clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
- for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
- if (prom_set_color(ih, i + 32, clut[0], clut[1],
- clut[2]) != 0)
- break;
-#endif /* CONFIG_LOGO_LINUX_CLUT224 */
- }
-}
-
-
-/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
-static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
- unsigned long needed, unsigned long align)
-{
- unsigned long offset = reloc_offset();
- void *ret;
-
- *mem_start = _ALIGN(*mem_start, align);
- while ((*mem_start + needed) > *mem_end) {
- unsigned long room, chunk;
-
- prom_debug("Chunk exhausted, claiming more at %x...\n",
- RELOC(alloc_bottom));
- room = RELOC(alloc_top) - RELOC(alloc_bottom);
- if (room > DEVTREE_CHUNK_SIZE)
- room = DEVTREE_CHUNK_SIZE;
- if (room < PAGE_SIZE)
- prom_panic("No memory for flatten_device_tree (no room)");
- chunk = alloc_up(room, 0);
- if (chunk == 0)
- prom_panic("No memory for flatten_device_tree (claim failed)");
- *mem_end = RELOC(alloc_top);
- }
-
- ret = (void *)*mem_start;
- *mem_start += needed;
-
- return ret;
-}
-
-#define dt_push_token(token, mem_start, mem_end) \
- do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
-
-static unsigned long __init dt_find_string(char *str)
-{
- unsigned long offset = reloc_offset();
- char *s, *os;
-
- s = os = (char *)RELOC(dt_string_start);
- s += 4;
- while (s < (char *)RELOC(dt_string_end)) {
- if (strcmp(s, str) == 0)
- return s - os;
- s += strlen(s) + 1;
- }
- return 0;
-}
-
-/*
- * The Open Firmware 1275 specification states properties must be 31 bytes or
- * less, however not all firmwares obey this. Make it 64 bytes to be safe.
- */
-#define MAX_PROPERTY_NAME 64
-
-static void __init scan_dt_build_strings(phandle node,
- unsigned long *mem_start,
- unsigned long *mem_end)
-{
- unsigned long offset = reloc_offset();
- char *prev_name, *namep, *sstart;
- unsigned long soff;
- phandle child;
-
- sstart = (char *)RELOC(dt_string_start);
-
- /* get and store all property names */
- prev_name = RELOC("");
- for (;;) {
- /* 64 is max len of name including nul. */
- namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
- if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
- /* No more nodes: unwind alloc */
- *mem_start = (unsigned long)namep;
- break;
- }
-
- /* skip "name" */
- if (strcmp(namep, RELOC("name")) == 0) {
- *mem_start = (unsigned long)namep;
- prev_name = RELOC("name");
- continue;
- }
- /* get/create string entry */
- soff = dt_find_string(namep);
- if (soff != 0) {
- *mem_start = (unsigned long)namep;
- namep = sstart + soff;
- } else {
- /* Trim off some if we can */
- *mem_start = (unsigned long)namep + strlen(namep) + 1;
- RELOC(dt_string_end) = *mem_start;
- }
- prev_name = namep;
- }
-
- /* do all our children */
- child = call_prom("child", 1, 1, node);
- while (child != 0) {
- scan_dt_build_strings(child, mem_start, mem_end);
- child = call_prom("peer", 1, 1, child);
- }
-}
-
-static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
- unsigned long *mem_end)
-{
- phandle child;
- char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
- unsigned long soff;
- unsigned char *valp;
- unsigned long offset = reloc_offset();
- static char pname[MAX_PROPERTY_NAME];
- int l;
-
- dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
-
- /* get the node's full name */
- namep = (char *)*mem_start;
- l = call_prom("package-to-path", 3, 1, node,
- namep, *mem_end - *mem_start);
- if (l >= 0) {
- /* Didn't fit? Get more room. */
- if ((l+1) > (*mem_end - *mem_start)) {
- namep = make_room(mem_start, mem_end, l+1, 1);
- call_prom("package-to-path", 3, 1, node, namep, l);
- }
- namep[l] = '\0';
-
- /* Fixup an Apple bug where they have bogus \0 chars in the
- * middle of the path in some properties
- */
- for (p = namep, ep = namep + l; p < ep; p++)
- if (*p == '\0') {
- memmove(p, p+1, ep - p);
- ep--; l--; p--;
- }
-
- /* now try to extract the unit name in that mess */
- for (p = namep, lp = NULL; *p; p++)
- if (*p == '/')
- lp = p + 1;
- if (lp != NULL)
- memmove(namep, lp, strlen(lp) + 1);
- *mem_start = _ALIGN(((unsigned long) namep) +
- strlen(namep) + 1, 4);
- }
-
- /* get it again for debugging */
- path = RELOC(prom_scratch);
- memset(path, 0, PROM_SCRATCH_SIZE);
- call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
-
- /* get and store all properties */
- prev_name = RELOC("");
- sstart = (char *)RELOC(dt_string_start);
- for (;;) {
- if (call_prom("nextprop", 3, 1, node, prev_name,
- RELOC(pname)) != 1)
- break;
-
- /* skip "name" */
- if (strcmp(RELOC(pname), RELOC("name")) == 0) {
- prev_name = RELOC("name");
- continue;
- }
-
- /* find string offset */
- soff = dt_find_string(RELOC(pname));
- if (soff == 0) {
- prom_printf("WARNING: Can't find string index for"
- " <%s>, node %s\n", RELOC(pname), path);
- break;
- }
- prev_name = sstart + soff;
-
- /* get length */
- l = call_prom("getproplen", 2, 1, node, RELOC(pname));
-
- /* sanity checks */
- if (l == PROM_ERROR)
- continue;
- if (l > MAX_PROPERTY_LENGTH) {
- prom_printf("WARNING: ignoring large property ");
- /* It seems OF doesn't null-terminate the path :-( */
- prom_printf("[%s] ", path);
- prom_printf("%s length 0x%x\n", RELOC(pname), l);
- continue;
- }
-
- /* push property head */
- dt_push_token(OF_DT_PROP, mem_start, mem_end);
- dt_push_token(l, mem_start, mem_end);
- dt_push_token(soff, mem_start, mem_end);
-
- /* push property content */
- valp = make_room(mem_start, mem_end, l, 4);
- call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
- *mem_start = _ALIGN(*mem_start, 4);
- }
-
- /* Add a "linux,phandle" property. */
- soff = dt_find_string(RELOC("linux,phandle"));
- if (soff == 0)
- prom_printf("WARNING: Can't find string index for"
- " <linux-phandle> node %s\n", path);
- else {
- dt_push_token(OF_DT_PROP, mem_start, mem_end);
- dt_push_token(4, mem_start, mem_end);
- dt_push_token(soff, mem_start, mem_end);
- valp = make_room(mem_start, mem_end, 4, 4);
- *(u32 *)valp = node;
- }
-
- /* do all our children */
- child = call_prom("child", 1, 1, node);
- while (child != 0) {
- scan_dt_build_struct(child, mem_start, mem_end);
- child = call_prom("peer", 1, 1, child);
- }
-
- dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
-}
-
-static void __init flatten_device_tree(void)
-{
- phandle root;
- unsigned long offset = reloc_offset();
- unsigned long mem_start, mem_end, room;
- struct boot_param_header *hdr;
- struct prom_t *_prom = PTRRELOC(&prom);
- char *namep;
- u64 *rsvmap;
-
- /*
- * Check how much room we have between alloc top & bottom (+/- a
- * few pages), crop to 4Mb, as this is our "chuck" size
- */
- room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
- if (room > DEVTREE_CHUNK_SIZE)
- room = DEVTREE_CHUNK_SIZE;
- prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
-
- /* Now try to claim that */
- mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
- if (mem_start == 0)
- prom_panic("Can't allocate initial device-tree chunk\n");
- mem_end = RELOC(alloc_top);
-
- /* Get root of tree */
- root = call_prom("peer", 1, 1, (phandle)0);
- if (root == (phandle)0)
- prom_panic ("couldn't get device tree root\n");
-
- /* Build header and make room for mem rsv map */
- mem_start = _ALIGN(mem_start, 4);
- hdr = make_room(&mem_start, &mem_end,
- sizeof(struct boot_param_header), 4);
- RELOC(dt_header_start) = (unsigned long)hdr;
- rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
-
- /* Start of strings */
- mem_start = PAGE_ALIGN(mem_start);
- RELOC(dt_string_start) = mem_start;
- mem_start += 4; /* hole */
-
- /* Add "linux,phandle" in there, we'll need it */
- namep = make_room(&mem_start, &mem_end, 16, 1);
- strcpy(namep, RELOC("linux,phandle"));
- mem_start = (unsigned long)namep + strlen(namep) + 1;
-
- /* Build string array */
- prom_printf("Building dt strings...\n");
- scan_dt_build_strings(root, &mem_start, &mem_end);
- RELOC(dt_string_end) = mem_start;
-
- /* Build structure */
- mem_start = PAGE_ALIGN(mem_start);
- RELOC(dt_struct_start) = mem_start;
- prom_printf("Building dt structure...\n");
- scan_dt_build_struct(root, &mem_start, &mem_end);
- dt_push_token(OF_DT_END, &mem_start, &mem_end);
- RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
-
- /* Finish header */
- hdr->boot_cpuid_phys = _prom->cpu;
- hdr->magic = OF_DT_HEADER;
- hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
- hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
- hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
- hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
- hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
- hdr->version = OF_DT_VERSION;
- /* Version 16 is not backward compatible */
- hdr->last_comp_version = 0x10;
-
- /* Reserve the whole thing and copy the reserve map in, we
- * also bump mem_reserve_cnt to cause further reservations to
- * fail since it's too late.
- */
- reserve_mem(RELOC(dt_header_start), hdr->totalsize);
- memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
-
-#ifdef DEBUG_PROM
- {
- int i;
- prom_printf("reserved memory map:\n");
- for (i = 0; i < RELOC(mem_reserve_cnt); i++)
- prom_printf(" %x - %x\n", RELOC(mem_reserve_map)[i].base,
- RELOC(mem_reserve_map)[i].size);
- }
-#endif
- RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
-
- prom_printf("Device tree strings 0x%x -> 0x%x\n",
- RELOC(dt_string_start), RELOC(dt_string_end));
- prom_printf("Device tree struct 0x%x -> 0x%x\n",
- RELOC(dt_struct_start), RELOC(dt_struct_end));
-
-}
-
-
-static void __init fixup_device_tree(void)
-{
- unsigned long offset = reloc_offset();
- phandle u3, i2c, mpic;
- u32 u3_rev;
- u32 interrupts[2];
- u32 parent;
-
- /* Some G5s have a missing interrupt definition, fix it up here */
- u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
- if (!PHANDLE_VALID(u3))
- return;
- i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
- if (!PHANDLE_VALID(i2c))
- return;
- mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
- if (!PHANDLE_VALID(mpic))
- return;
-
- /* check if proper rev of u3 */
- if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
- == PROM_ERROR)
- return;
- if (u3_rev < 0x35 || u3_rev > 0x39)
- return;
- /* does it need fixup ? */
- if (prom_getproplen(i2c, "interrupts") > 0)
- return;
-
- prom_printf("fixing up bogus interrupts for u3 i2c...\n");
-
- /* interrupt on this revision of u3 is number 0 and level */
- interrupts[0] = 0;
- interrupts[1] = 1;
- prom_setprop(i2c, "interrupts", &interrupts, sizeof(interrupts));
- parent = (u32)mpic;
- prom_setprop(i2c, "interrupt-parent", &parent, sizeof(parent));
-}
-
-
-static void __init prom_find_boot_cpu(void)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- u32 getprop_rval;
- ihandle prom_cpu;
- phandle cpu_pkg;
-
- if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
- prom_panic("cannot find boot cpu");
-
- cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
-
- prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
- _prom->cpu = getprop_rval;
-
- prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu);
-}
-
-static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
-
- if ( r3 && r4 && r4 != 0xdeadbeef) {
- u64 val;
-
- RELOC(prom_initrd_start) = (r3 >= KERNELBASE) ? __pa(r3) : r3;
- RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
-
- val = (u64)RELOC(prom_initrd_start);
- prom_setprop(_prom->chosen, "linux,initrd-start", &val, sizeof(val));
- val = (u64)RELOC(prom_initrd_end);
- prom_setprop(_prom->chosen, "linux,initrd-end", &val, sizeof(val));
-
- reserve_mem(RELOC(prom_initrd_start),
- RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
-
- prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
- prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
- }
-#endif /* CONFIG_BLK_DEV_INITRD */
-}
-
-/*
- * We enter here early on, when the Open Firmware prom is still
- * handling exceptions and the MMU hash table for us.
- */
-
-unsigned long __init prom_init(unsigned long r3, unsigned long r4, unsigned long pp,
- unsigned long r6, unsigned long r7)
-{
- unsigned long offset = reloc_offset();
- struct prom_t *_prom = PTRRELOC(&prom);
- unsigned long phys = KERNELBASE - offset;
- u32 getprop_rval;
-
- /*
- * First zero the BSS
- */
- memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
-
- /*
- * Init interface to Open Firmware, get some node references,
- * like /chosen
- */
- prom_init_client_services(pp);
-
- /*
- * Init prom stdout device
- */
- prom_init_stdout();
- prom_debug("klimit=0x%x\n", RELOC(klimit));
- prom_debug("offset=0x%x\n", offset);
-
- /*
- * Check for an initrd
- */
- prom_check_initrd(r3, r4);
-
- /*
- * Get default machine type. At this point, we do not differenciate
- * between pSeries SMP and pSeries LPAR
- */
- RELOC(of_platform) = prom_find_machine_type();
- getprop_rval = RELOC(of_platform);
- prom_setprop(_prom->chosen, "linux,platform",
- &getprop_rval, sizeof(getprop_rval));
-
- /*
- * On pSeries, inform the firmware about our capabilities
- */
- if (RELOC(of_platform) == PLATFORM_PSERIES ||
- RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
- prom_send_capabilities();
-
- /*
- * On pSeries and Cell, copy the CPU hold code
- */
- if (RELOC(of_platform) & (PLATFORM_PSERIES | PLATFORM_CELL))
- copy_and_flush(0, KERNELBASE - offset, 0x100, 0);
-
- /*
- * Get memory cells format
- */
- getprop_rval = 1;
- prom_getprop(_prom->root, "#size-cells",
- &getprop_rval, sizeof(getprop_rval));
- _prom->root_size_cells = getprop_rval;
- getprop_rval = 2;
- prom_getprop(_prom->root, "#address-cells",
- &getprop_rval, sizeof(getprop_rval));
- _prom->root_addr_cells = getprop_rval;
-
- /*
- * Do early parsing of command line
- */
- early_cmdline_parse();
-
- /*
- * Initialize memory management within prom_init
- */
- prom_init_mem();
-
- /*
- * Determine which cpu is actually running right _now_
- */
- prom_find_boot_cpu();
-
- /*
- * Initialize display devices
- */
- prom_check_displays();
-
- /*
- * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
- * that uses the allocator, we need to make sure we get the top of memory
- * available for us here...
- */
- if (RELOC(of_platform) == PLATFORM_PSERIES)
- prom_initialize_tce_table();
-
- /*
- * On non-powermacs, try to instantiate RTAS and puts all CPUs
- * in spin-loops. PowerMacs don't have a working RTAS and use
- * a different way to spin CPUs
- */
- if (RELOC(of_platform) != PLATFORM_POWERMAC) {
- prom_instantiate_rtas();
- prom_hold_cpus();
- }
-
- /*
- * Fill in some infos for use by the kernel later on
- */
- if (RELOC(ppc64_iommu_off))
- prom_setprop(_prom->chosen, "linux,iommu-off", NULL, 0);
-
- if (RELOC(iommu_force_on))
- prom_setprop(_prom->chosen, "linux,iommu-force-on", NULL, 0);
-
- if (RELOC(prom_memory_limit))
- prom_setprop(_prom->chosen, "linux,memory-limit",
- PTRRELOC(&prom_memory_limit), sizeof(RELOC(prom_memory_limit)));
-
- if (RELOC(prom_tce_alloc_start)) {
- prom_setprop(_prom->chosen, "linux,tce-alloc-start",
- PTRRELOC(&prom_tce_alloc_start), sizeof(RELOC(prom_tce_alloc_start)));
- prom_setprop(_prom->chosen, "linux,tce-alloc-end",
- PTRRELOC(&prom_tce_alloc_end), sizeof(RELOC(prom_tce_alloc_end)));
- }
-
- /*
- * Fixup any known bugs in the device-tree
- */
- fixup_device_tree();
-
- /*
- * Now finally create the flattened device-tree
- */
- prom_printf("copying OF device tree ...\n");
- flatten_device_tree();
-
- /* in case stdin is USB and still active on IBM machines... */
- prom_close_stdin();
-
- /*
- * Call OF "quiesce" method to shut down pending DMA's from
- * devices etc...
- */
- prom_printf("Calling quiesce ...\n");
- call_prom("quiesce", 0, 0);
-
- /*
- * And finally, call the kernel passing it the flattened device
- * tree and NULL as r5, thus triggering the new entry point which
- * is common to us and kexec
- */
- prom_printf("returning from prom_init\n");
- prom_debug("->dt_header_start=0x%x\n", RELOC(dt_header_start));
- prom_debug("->phys=0x%x\n", phys);
-
- __start(RELOC(dt_header_start), phys, 0);
-
- return 0;
-}
-
+++ /dev/null
-/*
- *
- *
- * PowerPC-specific semaphore code.
- *
- * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * April 2001 - Reworked by Paul Mackerras <paulus@samba.org>
- * to eliminate the SMP races in the old version between the updates
- * of `count' and `waking'. Now we use negative `count' values to
- * indicate that some process(es) are waiting for the semaphore.
- */
-
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/module.h>
-
-#include <asm/atomic.h>
-#include <asm/semaphore.h>
-#include <asm/errno.h>
-
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- int old_count, tmp;
-
- __asm__ __volatile__("\n"
-"1: lwarx %0,0,%3\n"
-" srawi %1,%0,31\n"
-" andc %1,%0,%1\n"
-" add %1,%1,%4\n"
-" stwcx. %1,0,%3\n"
-" bne 1b"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "r" (&sem->count), "r" (incr), "m" (sem->count)
- : "cc");
-
- return old_count;
-}
-
-void __up(struct semaphore *sem)
-{
- /*
- * Note that we incremented count in up() before we came here,
- * but that was ineffective since the result was <= 0, and
- * any negative value of count is equivalent to 0.
- * This ends up setting count to 1, unless count is now > 0
- * (i.e. because some other cpu has called up() in the meantime),
- * in which case we just increment count.
- */
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-EXPORT_SYMBOL(__up);
-
-/*
- * Note that when we come in to __down or __down_interruptible,
- * we have already decremented count, but that decrement was
- * ineffective since the result was < 0, and any negative value
- * of count is equivalent to 0.
- * Thus it is only when we decrement count from some value > 0
- * that we have actually got the semaphore.
- */
-void __sched __down(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- /*
- * Try to get the semaphore. If the count is > 0, then we've
- * got the semaphore; we decrement count and exit the loop.
- * If the count is 0 or negative, we set it to -1, indicating
- * that we are asleep, and then sleep.
- */
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
-
- /*
- * If there are any more sleepers, wake one of them up so
- * that it can either get the semaphore, or set count to -1
- * indicating that there are still processes sleeping.
- */
- wake_up(&sem->wait);
-}
-EXPORT_SYMBOL(__down);
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_INTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- /*
- * A signal is pending - give up trying.
- * Set sem->count to 0 if it is negative,
- * since we are no longer sleeping.
- */
- __sem_update_count(sem, 0);
- retval = -EINTR;
- break;
- }
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
-
- wake_up(&sem->wait);
- return retval;
-}
-EXPORT_SYMBOL(__down_interruptible);
+++ /dev/null
-/*
- * linux/arch/ppc64/kernel/vdso.c
- *
- * Copyright (C) 2004 Benjamin Herrenschmidt, IBM Corp.
- * <benh@kernel.crashing.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/elf.h>
-#include <linux/security.h>
-#include <linux/bootmem.h>
-
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-#include <asm/machdep.h>
-#include <asm/cputable.h>
-#include <asm/sections.h>
-#include <asm/systemcfg.h>
-#include <asm/vdso.h>
-
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt...) printk(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-
-/*
- * The vDSOs themselves are here
- */
-extern char vdso64_start, vdso64_end;
-extern char vdso32_start, vdso32_end;
-
-static void *vdso64_kbase = &vdso64_start;
-static void *vdso32_kbase = &vdso32_start;
-
-unsigned int vdso64_pages;
-unsigned int vdso32_pages;
-
-/* Signal trampolines user addresses */
-
-unsigned long vdso64_rt_sigtramp;
-unsigned long vdso32_sigtramp;
-unsigned long vdso32_rt_sigtramp;
-
-/* Format of the patch table */
-struct vdso_patch_def
-{
- u32 pvr_mask, pvr_value;
- const char *gen_name;
- const char *fix_name;
-};
-
-/* Table of functions to patch based on the CPU type/revision
- *
- * TODO: Improve by adding whole lists for each entry
- */
-static struct vdso_patch_def vdso_patches[] = {
- {
- 0xffff0000, 0x003a0000, /* POWER5 */
- "__kernel_sync_dicache", "__kernel_sync_dicache_p5"
- },
- {
- 0xffff0000, 0x003b0000, /* POWER5 */
- "__kernel_sync_dicache", "__kernel_sync_dicache_p5"
- },
-};
-
-/*
- * Some infos carried around for each of them during parsing at
- * boot time.
- */
-struct lib32_elfinfo
-{
- Elf32_Ehdr *hdr; /* ptr to ELF */
- Elf32_Sym *dynsym; /* ptr to .dynsym section */
- unsigned long dynsymsize; /* size of .dynsym section */
- char *dynstr; /* ptr to .dynstr section */
- unsigned long text; /* offset of .text section in .so */
-};
-
-struct lib64_elfinfo
-{
- Elf64_Ehdr *hdr;
- Elf64_Sym *dynsym;
- unsigned long dynsymsize;
- char *dynstr;
- unsigned long text;
-};
-
-
-#ifdef __DEBUG
-static void dump_one_vdso_page(struct page *pg, struct page *upg)
-{
- printk("kpg: %p (c:%d,f:%08lx)", __va(page_to_pfn(pg) << PAGE_SHIFT),
- page_count(pg),
- pg->flags);
- if (upg/* && pg != upg*/) {
- printk(" upg: %p (c:%d,f:%08lx)", __va(page_to_pfn(upg) << PAGE_SHIFT),
- page_count(upg),
- upg->flags);
- }
- printk("\n");
-}
-
-static void dump_vdso_pages(struct vm_area_struct * vma)
-{
- int i;
-
- if (!vma || test_thread_flag(TIF_32BIT)) {
- printk("vDSO32 @ %016lx:\n", (unsigned long)vdso32_kbase);
- for (i=0; i<vdso32_pages; i++) {
- struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE);
- struct page *upg = (vma && vma->vm_mm) ?
- follow_page(vma->vm_mm, vma->vm_start + i*PAGE_SIZE, 0)
- : NULL;
- dump_one_vdso_page(pg, upg);
- }
- }
- if (!vma || !test_thread_flag(TIF_32BIT)) {
- printk("vDSO64 @ %016lx:\n", (unsigned long)vdso64_kbase);
- for (i=0; i<vdso64_pages; i++) {
- struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE);
- struct page *upg = (vma && vma->vm_mm) ?
- follow_page(vma->vm_mm, vma->vm_start + i*PAGE_SIZE, 0)
- : NULL;
- dump_one_vdso_page(pg, upg);
- }
- }
-}
-#endif /* DEBUG */
-
-/*
- * Keep a dummy vma_close for now, it will prevent VMA merging.
- */
-static void vdso_vma_close(struct vm_area_struct * vma)
-{
-}
-
-/*
- * Our nopage() function, maps in the actual vDSO kernel pages, they will
- * be mapped read-only by do_no_page(), and eventually COW'ed, either
- * right away for an initial write access, or by do_wp_page().
- */
-static struct page * vdso_vma_nopage(struct vm_area_struct * vma,
- unsigned long address, int *type)
-{
- unsigned long offset = address - vma->vm_start;
- struct page *pg;
- void *vbase = test_thread_flag(TIF_32BIT) ? vdso32_kbase : vdso64_kbase;
-
- DBG("vdso_vma_nopage(current: %s, address: %016lx, off: %lx)\n",
- current->comm, address, offset);
-
- if (address < vma->vm_start || address > vma->vm_end)
- return NOPAGE_SIGBUS;
-
- /*
- * Last page is systemcfg.
- */
- if ((vma->vm_end - address) <= PAGE_SIZE)
- pg = virt_to_page(_systemcfg);
- else
- pg = virt_to_page(vbase + offset);
-
- get_page(pg);
- DBG(" ->page count: %d\n", page_count(pg));
-
- return pg;
-}
-
-static struct vm_operations_struct vdso_vmops = {
- .close = vdso_vma_close,
- .nopage = vdso_vma_nopage,
-};
-
-/*
- * This is called from binfmt_elf, we create the special vma for the
- * vDSO and insert it into the mm struct tree
- */
-int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- unsigned long vdso_pages;
- unsigned long vdso_base;
-
- if (test_thread_flag(TIF_32BIT)) {
- vdso_pages = vdso32_pages;
- vdso_base = VDSO32_MBASE;
- } else {
- vdso_pages = vdso64_pages;
- vdso_base = VDSO64_MBASE;
- }
-
- current->thread.vdso_base = 0;
-
- /* vDSO has a problem and was disabled, just don't "enable" it for the
- * process
- */
- if (vdso_pages == 0)
- return 0;
-
- vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
- if (vma == NULL)
- return -ENOMEM;
-
- memset(vma, 0, sizeof(*vma));
-
- /*
- * pick a base address for the vDSO in process space. We try to put it
- * at vdso_base which is the "natural" base for it, but we might fail
- * and end up putting it elsewhere.
- */
- vdso_base = get_unmapped_area(NULL, vdso_base,
- vdso_pages << PAGE_SHIFT, 0, 0);
- if (vdso_base & ~PAGE_MASK) {
- kmem_cache_free(vm_area_cachep, vma);
- return (int)vdso_base;
- }
-
- current->thread.vdso_base = vdso_base;
-
- vma->vm_mm = mm;
- vma->vm_start = current->thread.vdso_base;
-
- /*
- * the VMA size is one page more than the vDSO since systemcfg
- * is mapped in the last one
- */
- vma->vm_end = vma->vm_start + ((vdso_pages + 1) << PAGE_SHIFT);
-
- /*
- * our vma flags don't have VM_WRITE so by default, the process isn't allowed
- * to write those pages.
- * gdb can break that with ptrace interface, and thus trigger COW on those
- * pages but it's then your responsibility to never do that on the "data" page
- * of the vDSO or you'll stop getting kernel updates and your nice userland
- * gettimeofday will be totally dead. It's fine to use that for setting
- * breakpoints in the vDSO code pages though
- */
- vma->vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | VM_RESERVED;
- vma->vm_flags |= mm->def_flags;
- vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
- vma->vm_ops = &vdso_vmops;
-
- down_write(&mm->mmap_sem);
- if (insert_vm_struct(mm, vma)) {
- up_write(&mm->mmap_sem);
- kmem_cache_free(vm_area_cachep, vma);
- return -ENOMEM;
- }
- mm->total_vm += (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
- up_write(&mm->mmap_sem);
-
- return 0;
-}
-
-static void * __init find_section32(Elf32_Ehdr *ehdr, const char *secname,
- unsigned long *size)
-{
- Elf32_Shdr *sechdrs;
- unsigned int i;
- char *secnames;
-
- /* Grab section headers and strings so we can tell who is who */
- sechdrs = (void *)ehdr + ehdr->e_shoff;
- secnames = (void *)ehdr + sechdrs[ehdr->e_shstrndx].sh_offset;
-
- /* Find the section they want */
- for (i = 1; i < ehdr->e_shnum; i++) {
- if (strcmp(secnames+sechdrs[i].sh_name, secname) == 0) {
- if (size)
- *size = sechdrs[i].sh_size;
- return (void *)ehdr + sechdrs[i].sh_offset;
- }
- }
- *size = 0;
- return NULL;
-}
-
-static void * __init find_section64(Elf64_Ehdr *ehdr, const char *secname,
- unsigned long *size)
-{
- Elf64_Shdr *sechdrs;
- unsigned int i;
- char *secnames;
-
- /* Grab section headers and strings so we can tell who is who */
- sechdrs = (void *)ehdr + ehdr->e_shoff;
- secnames = (void *)ehdr + sechdrs[ehdr->e_shstrndx].sh_offset;
-
- /* Find the section they want */
- for (i = 1; i < ehdr->e_shnum; i++) {
- if (strcmp(secnames+sechdrs[i].sh_name, secname) == 0) {
- if (size)
- *size = sechdrs[i].sh_size;
- return (void *)ehdr + sechdrs[i].sh_offset;
- }
- }
- if (size)
- *size = 0;
- return NULL;
-}
-
-static Elf32_Sym * __init find_symbol32(struct lib32_elfinfo *lib, const char *symname)
-{
- unsigned int i;
- char name[32], *c;
-
- for (i = 0; i < (lib->dynsymsize / sizeof(Elf32_Sym)); i++) {
- if (lib->dynsym[i].st_name == 0)
- continue;
- strlcpy(name, lib->dynstr + lib->dynsym[i].st_name, 32);
- c = strchr(name, '@');
- if (c)
- *c = 0;
- if (strcmp(symname, name) == 0)
- return &lib->dynsym[i];
- }
- return NULL;
-}
-
-static Elf64_Sym * __init find_symbol64(struct lib64_elfinfo *lib, const char *symname)
-{
- unsigned int i;
- char name[32], *c;
-
- for (i = 0; i < (lib->dynsymsize / sizeof(Elf64_Sym)); i++) {
- if (lib->dynsym[i].st_name == 0)
- continue;
- strlcpy(name, lib->dynstr + lib->dynsym[i].st_name, 32);
- c = strchr(name, '@');
- if (c)
- *c = 0;
- if (strcmp(symname, name) == 0)
- return &lib->dynsym[i];
- }
- return NULL;
-}
-
-/* Note that we assume the section is .text and the symbol is relative to
- * the library base
- */
-static unsigned long __init find_function32(struct lib32_elfinfo *lib, const char *symname)
-{
- Elf32_Sym *sym = find_symbol32(lib, symname);
-
- if (sym == NULL) {
- printk(KERN_WARNING "vDSO32: function %s not found !\n", symname);
- return 0;
- }
- return sym->st_value - VDSO32_LBASE;
-}
-
-/* Note that we assume the section is .text and the symbol is relative to
- * the library base
- */
-static unsigned long __init find_function64(struct lib64_elfinfo *lib, const char *symname)
-{
- Elf64_Sym *sym = find_symbol64(lib, symname);
-
- if (sym == NULL) {
- printk(KERN_WARNING "vDSO64: function %s not found !\n", symname);
- return 0;
- }
-#ifdef VDS64_HAS_DESCRIPTORS
- return *((u64 *)(vdso64_kbase + sym->st_value - VDSO64_LBASE)) - VDSO64_LBASE;
-#else
- return sym->st_value - VDSO64_LBASE;
-#endif
-}
-
-
-static __init int vdso_do_find_sections(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64)
-{
- void *sect;
-
- /*
- * Locate symbol tables & text section
- */
-
- v32->dynsym = find_section32(v32->hdr, ".dynsym", &v32->dynsymsize);
- v32->dynstr = find_section32(v32->hdr, ".dynstr", NULL);
- if (v32->dynsym == NULL || v32->dynstr == NULL) {
- printk(KERN_ERR "vDSO32: a required symbol section was not found\n");
- return -1;
- }
- sect = find_section32(v32->hdr, ".text", NULL);
- if (sect == NULL) {
- printk(KERN_ERR "vDSO32: the .text section was not found\n");
- return -1;
- }
- v32->text = sect - vdso32_kbase;
-
- v64->dynsym = find_section64(v64->hdr, ".dynsym", &v64->dynsymsize);
- v64->dynstr = find_section64(v64->hdr, ".dynstr", NULL);
- if (v64->dynsym == NULL || v64->dynstr == NULL) {
- printk(KERN_ERR "vDSO64: a required symbol section was not found\n");
- return -1;
- }
- sect = find_section64(v64->hdr, ".text", NULL);
- if (sect == NULL) {
- printk(KERN_ERR "vDSO64: the .text section was not found\n");
- return -1;
- }
- v64->text = sect - vdso64_kbase;
-
- return 0;
-}
-
-static __init void vdso_setup_trampolines(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64)
-{
- /*
- * Find signal trampolines
- */
-
- vdso64_rt_sigtramp = find_function64(v64, "__kernel_sigtramp_rt64");
- vdso32_sigtramp = find_function32(v32, "__kernel_sigtramp32");
- vdso32_rt_sigtramp = find_function32(v32, "__kernel_sigtramp_rt32");
-}
-
-static __init int vdso_fixup_datapage(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64)
-{
- Elf32_Sym *sym32;
- Elf64_Sym *sym64;
-
- sym32 = find_symbol32(v32, "__kernel_datapage_offset");
- if (sym32 == NULL) {
- printk(KERN_ERR "vDSO32: Can't find symbol __kernel_datapage_offset !\n");
- return -1;
- }
- *((int *)(vdso32_kbase + (sym32->st_value - VDSO32_LBASE))) =
- (vdso32_pages << PAGE_SHIFT) - (sym32->st_value - VDSO32_LBASE);
-
- sym64 = find_symbol64(v64, "__kernel_datapage_offset");
- if (sym64 == NULL) {
- printk(KERN_ERR "vDSO64: Can't find symbol __kernel_datapage_offset !\n");
- return -1;
- }
- *((int *)(vdso64_kbase + sym64->st_value - VDSO64_LBASE)) =
- (vdso64_pages << PAGE_SHIFT) - (sym64->st_value - VDSO64_LBASE);
-
- return 0;
-}
-
-static int vdso_do_func_patch32(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64,
- const char *orig, const char *fix)
-{
- Elf32_Sym *sym32_gen, *sym32_fix;
-
- sym32_gen = find_symbol32(v32, orig);
- if (sym32_gen == NULL) {
- printk(KERN_ERR "vDSO32: Can't find symbol %s !\n", orig);
- return -1;
- }
- sym32_fix = find_symbol32(v32, fix);
- if (sym32_fix == NULL) {
- printk(KERN_ERR "vDSO32: Can't find symbol %s !\n", fix);
- return -1;
- }
- sym32_gen->st_value = sym32_fix->st_value;
- sym32_gen->st_size = sym32_fix->st_size;
- sym32_gen->st_info = sym32_fix->st_info;
- sym32_gen->st_other = sym32_fix->st_other;
- sym32_gen->st_shndx = sym32_fix->st_shndx;
-
- return 0;
-}
-
-static int vdso_do_func_patch64(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64,
- const char *orig, const char *fix)
-{
- Elf64_Sym *sym64_gen, *sym64_fix;
-
- sym64_gen = find_symbol64(v64, orig);
- if (sym64_gen == NULL) {
- printk(KERN_ERR "vDSO64: Can't find symbol %s !\n", orig);
- return -1;
- }
- sym64_fix = find_symbol64(v64, fix);
- if (sym64_fix == NULL) {
- printk(KERN_ERR "vDSO64: Can't find symbol %s !\n", fix);
- return -1;
- }
- sym64_gen->st_value = sym64_fix->st_value;
- sym64_gen->st_size = sym64_fix->st_size;
- sym64_gen->st_info = sym64_fix->st_info;
- sym64_gen->st_other = sym64_fix->st_other;
- sym64_gen->st_shndx = sym64_fix->st_shndx;
-
- return 0;
-}
-
-static __init int vdso_fixup_alt_funcs(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64)
-{
- u32 pvr;
- int i;
-
- pvr = mfspr(SPRN_PVR);
- for (i = 0; i < ARRAY_SIZE(vdso_patches); i++) {
- struct vdso_patch_def *patch = &vdso_patches[i];
- int match = (pvr & patch->pvr_mask) == patch->pvr_value;
-
- DBG("patch %d (mask: %x, pvr: %x) : %s\n",
- i, patch->pvr_mask, patch->pvr_value, match ? "match" : "skip");
-
- if (!match)
- continue;
-
- DBG("replacing %s with %s...\n", patch->gen_name, patch->fix_name);
-
- /*
- * Patch the 32 bits and 64 bits symbols. Note that we do not patch
- * the "." symbol on 64 bits. It would be easy to do, but doesn't
- * seem to be necessary, patching the OPD symbol is enough.
- */
- vdso_do_func_patch32(v32, v64, patch->gen_name, patch->fix_name);
- vdso_do_func_patch64(v32, v64, patch->gen_name, patch->fix_name);
- }
-
- return 0;
-}
-
-
-static __init int vdso_setup(void)
-{
- struct lib32_elfinfo v32;
- struct lib64_elfinfo v64;
-
- v32.hdr = vdso32_kbase;
- v64.hdr = vdso64_kbase;
-
- if (vdso_do_find_sections(&v32, &v64))
- return -1;
-
- if (vdso_fixup_datapage(&v32, &v64))
- return -1;
-
- if (vdso_fixup_alt_funcs(&v32, &v64))
- return -1;
-
- vdso_setup_trampolines(&v32, &v64);
-
- return 0;
-}
-
-void __init vdso_init(void)
-{
- int i;
-
- vdso64_pages = (&vdso64_end - &vdso64_start) >> PAGE_SHIFT;
- vdso32_pages = (&vdso32_end - &vdso32_start) >> PAGE_SHIFT;
-
- DBG("vdso64_kbase: %p, 0x%x pages, vdso32_kbase: %p, 0x%x pages\n",
- vdso64_kbase, vdso64_pages, vdso32_kbase, vdso32_pages);
-
- /*
- * Initialize the vDSO images in memory, that is do necessary
- * fixups of vDSO symbols, locate trampolines, etc...
- */
- if (vdso_setup()) {
- printk(KERN_ERR "vDSO setup failure, not enabled !\n");
- /* XXX should free pages here ? */
- vdso64_pages = vdso32_pages = 0;
- return;
- }
-
- /* Make sure pages are in the correct state */
- for (i = 0; i < vdso64_pages; i++) {
- struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE);
- ClearPageReserved(pg);
- get_page(pg);
- }
- for (i = 0; i < vdso32_pages; i++) {
- struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE);
- ClearPageReserved(pg);
- get_page(pg);
- }
-
- get_page(virt_to_page(_systemcfg));
-}
-
-int in_gate_area_no_task(unsigned long addr)
-{
- return 0;
-}
-
-int in_gate_area(struct task_struct *task, unsigned long addr)
-{
- return 0;
-}
-
-struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
-{
- return NULL;
-}
-
+++ /dev/null
-#include <asm/page.h>
-#include <asm-generic/vmlinux.lds.h>
-
-OUTPUT_ARCH(powerpc:common64)
-jiffies = jiffies_64;
-SECTIONS
-{
- /* Sections to be discarded. */
- /DISCARD/ : {
- *(.exitcall.exit)
- }
-
-
- /* Read-only sections, merged into text segment: */
- .text : {
- *(.text .text.*)
- SCHED_TEXT
- LOCK_TEXT
- KPROBES_TEXT
- *(.fixup)
- . = ALIGN(PAGE_SIZE);
- _etext = .;
- }
-
- __ex_table : {
- __start___ex_table = .;
- *(__ex_table)
- __stop___ex_table = .;
- }
-
- __bug_table : {
- __start___bug_table = .;
- *(__bug_table)
- __stop___bug_table = .;
- }
-
- __ftr_fixup : {
- __start___ftr_fixup = .;
- *(__ftr_fixup)
- __stop___ftr_fixup = .;
- }
-
- RODATA
-
-
- /* will be freed after init */
- . = ALIGN(PAGE_SIZE);
- __init_begin = .;
-
- .init.text : {
- _sinittext = .;
- *(.init.text)
- _einittext = .;
- }
-
- .init.data : {
- *(.init.data)
- }
-
- . = ALIGN(16);
- .init.setup : {
- __setup_start = .;
- *(.init.setup)
- __setup_end = .;
- }
-
- .initcall.init : {
- __initcall_start = .;
- *(.initcall1.init)
- *(.initcall2.init)
- *(.initcall3.init)
- *(.initcall4.init)
- *(.initcall5.init)
- *(.initcall6.init)
- *(.initcall7.init)
- __initcall_end = .;
- }
-
- .con_initcall.init : {
- __con_initcall_start = .;
- *(.con_initcall.init)
- __con_initcall_end = .;
- }
-
- SECURITY_INIT
-
- . = ALIGN(PAGE_SIZE);
- .init.ramfs : {
- __initramfs_start = .;
- *(.init.ramfs)
- __initramfs_end = .;
- }
-
- .data.percpu : {
- __per_cpu_start = .;
- *(.data.percpu)
- __per_cpu_end = .;
- }
-
- . = ALIGN(PAGE_SIZE);
- . = ALIGN(16384);
- __init_end = .;
- /* freed after init ends here */
-
-
- /* Read/write sections */
- . = ALIGN(PAGE_SIZE);
- . = ALIGN(16384);
- _sdata = .;
- /* The initial task and kernel stack */
- .data.init_task : {
- *(.data.init_task)
- }
-
- . = ALIGN(PAGE_SIZE);
- .data.page_aligned : {
- *(.data.page_aligned)
- }
-
- .data.cacheline_aligned : {
- *(.data.cacheline_aligned)
- }
-
- .data : {
- *(.data .data.rel* .toc1)
- *(.branch_lt)
- }
-
- .opd : {
- *(.opd)
- }
-
- .got : {
- __toc_start = .;
- *(.got)
- *(.toc)
- . = ALIGN(PAGE_SIZE);
- _edata = .;
- }
-
-
- . = ALIGN(PAGE_SIZE);
- .bss : {
- __bss_start = .;
- *(.bss)
- __bss_stop = .;
- }
-
- . = ALIGN(PAGE_SIZE);
- _end = . ;
-}
+++ /dev/null
-/*
- * Copyright (C) 1996 Paul Mackerras.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#define GETREG(reg) \
- static inline unsigned long get_ ## reg (void) \
- { unsigned long ret; asm volatile ("mf" #reg " %0" : "=r" (ret) :); return ret; }
-
-#define SETREG(reg) \
- static inline void set_ ## reg (unsigned long val) \
- { asm volatile ("mt" #reg " %0" : : "r" (val)); }
-
-GETREG(msr)
-SETREG(msrd)
-GETREG(cr)
-
-#define GSETSPR(n, name) \
- static inline long get_ ## name (void) \
- { long ret; asm volatile ("mfspr %0," #n : "=r" (ret) : ); return ret; } \
- static inline void set_ ## name (long val) \
- { asm volatile ("mtspr " #n ",%0" : : "r" (val)); }
-
-GSETSPR(0, mq)
-GSETSPR(1, xer)
-GSETSPR(4, rtcu)
-GSETSPR(5, rtcl)
-GSETSPR(8, lr)
-GSETSPR(9, ctr)
-GSETSPR(18, dsisr)
-GSETSPR(19, dar)
-GSETSPR(22, dec)
-GSETSPR(25, sdr1)
-GSETSPR(26, srr0)
-GSETSPR(27, srr1)
-GSETSPR(272, sprg0)
-GSETSPR(273, sprg1)
-GSETSPR(274, sprg2)
-GSETSPR(275, sprg3)
-GSETSPR(282, ear)
-GSETSPR(287, pvr)
-GSETSPR(1008, hid0)
-GSETSPR(1009, hid1)
-GSETSPR(1010, iabr)
-GSETSPR(1023, pir)
-
-static inline void store_inst(void *p)
-{
- asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p));
-}
-
-static inline void cflush(void *p)
-{
- asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p));
-}
-
-static inline void cinval(void *p)
-{
- asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p));
-}
+++ /dev/null
-#ifndef _PPC64_PAGE_H
-#define _PPC64_PAGE_H
-
-/*
- * Copyright (C) 2001 PPC64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/config.h>
-#include <asm/asm-compat.h>
-
-/*
- * We support either 4k or 64k software page size. When using 64k pages
- * however, wether we are really supporting 64k pages in HW or not is
- * irrelevant to those definitions. We always define HW_PAGE_SHIFT to 12
- * as use of 64k pages remains a linux kernel specific, every notion of
- * page number shared with the firmware, TCEs, iommu, etc... still assumes
- * a page size of 4096.
- */
-#ifdef CONFIG_PPC_64K_PAGES
-#define PAGE_SHIFT 16
-#else
-#define PAGE_SHIFT 12
-#endif
-
-#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
-#define PAGE_MASK (~(PAGE_SIZE-1))
-
-/* HW_PAGE_SHIFT is always 4k pages */
-#define HW_PAGE_SHIFT 12
-#define HW_PAGE_SIZE (ASM_CONST(1) << HW_PAGE_SHIFT)
-#define HW_PAGE_MASK (~(HW_PAGE_SIZE-1))
-
-/* PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
- * HW_PAGE_SHIFT, that is 4k pages
- */
-#define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT)
-
-/* Segment size */
-#define SID_SHIFT 28
-#define SID_MASK 0xfffffffffUL
-#define ESID_MASK 0xfffffffff0000000UL
-#define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK)
-
-/* Large pages size */
-
-#ifndef __ASSEMBLY__
-extern unsigned int HPAGE_SHIFT;
-#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
-#define HPAGE_MASK (~(HPAGE_SIZE - 1))
-#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
-#endif /* __ASSEMBLY__ */
-
-#ifdef CONFIG_HUGETLB_PAGE
-
-
-#define HTLB_AREA_SHIFT 40
-#define HTLB_AREA_SIZE (1UL << HTLB_AREA_SHIFT)
-#define GET_HTLB_AREA(x) ((x) >> HTLB_AREA_SHIFT)
-
-#define LOW_ESID_MASK(addr, len) (((1U << (GET_ESID(addr+len-1)+1)) \
- - (1U << GET_ESID(addr))) & 0xffff)
-#define HTLB_AREA_MASK(addr, len) (((1U << (GET_HTLB_AREA(addr+len-1)+1)) \
- - (1U << GET_HTLB_AREA(addr))) & 0xffff)
-
-#define ARCH_HAS_HUGEPAGE_ONLY_RANGE
-#define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
-#define ARCH_HAS_SETCLEAR_HUGE_PTE
-
-#define touches_hugepage_low_range(mm, addr, len) \
- (LOW_ESID_MASK((addr), (len)) & (mm)->context.low_htlb_areas)
-#define touches_hugepage_high_range(mm, addr, len) \
- (HTLB_AREA_MASK((addr), (len)) & (mm)->context.high_htlb_areas)
-
-#define __within_hugepage_low_range(addr, len, segmask) \
- ((LOW_ESID_MASK((addr), (len)) | (segmask)) == (segmask))
-#define within_hugepage_low_range(addr, len) \
- __within_hugepage_low_range((addr), (len), \
- current->mm->context.low_htlb_areas)
-#define __within_hugepage_high_range(addr, len, zonemask) \
- ((HTLB_AREA_MASK((addr), (len)) | (zonemask)) == (zonemask))
-#define within_hugepage_high_range(addr, len) \
- __within_hugepage_high_range((addr), (len), \
- current->mm->context.high_htlb_areas)
-
-#define is_hugepage_only_range(mm, addr, len) \
- (touches_hugepage_high_range((mm), (addr), (len)) || \
- touches_hugepage_low_range((mm), (addr), (len)))
-#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-
-#define in_hugepage_area(context, addr) \
- (cpu_has_feature(CPU_FTR_16M_PAGE) && \
- ( ((1 << GET_HTLB_AREA(addr)) & (context).high_htlb_areas) || \
- ( ((addr) < 0x100000000L) && \
- ((1 << GET_ESID(addr)) & (context).low_htlb_areas) ) ) )
-
-#else /* !CONFIG_HUGETLB_PAGE */
-
-#define in_hugepage_area(mm, addr) 0
-
-#endif /* !CONFIG_HUGETLB_PAGE */
-
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
-#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
-
-#ifdef __KERNEL__
-#ifndef __ASSEMBLY__
-#include <asm/cache.h>
-
-#undef STRICT_MM_TYPECHECKS
-
-#define REGION_SIZE 4UL
-#define REGION_SHIFT 60UL
-#define REGION_MASK (((1UL<<REGION_SIZE)-1UL)<<REGION_SHIFT)
-
-static __inline__ void clear_page(void *addr)
-{
- unsigned long lines, line_size;
-
- line_size = ppc64_caches.dline_size;
- lines = ppc64_caches.dlines_per_page;
-
- __asm__ __volatile__(
- "mtctr %1 # clear_page\n\
-1: dcbz 0,%0\n\
- add %0,%0,%3\n\
- bdnz+ 1b"
- : "=r" (addr)
- : "r" (lines), "0" (addr), "r" (line_size)
- : "ctr", "memory");
-}
-
-extern void copy_4K_page(void *to, void *from);
-
-#ifdef CONFIG_PPC_64K_PAGES
-static inline void copy_page(void *to, void *from)
-{
- unsigned int i;
- for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) {
- copy_4K_page(to, from);
- to += 4096;
- from += 4096;
- }
-}
-#else /* CONFIG_PPC_64K_PAGES */
-static inline void copy_page(void *to, void *from)
-{
- copy_4K_page(to, from);
-}
-#endif /* CONFIG_PPC_64K_PAGES */
-
-struct page;
-extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
-extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *p);
-
-#ifdef STRICT_MM_TYPECHECKS
-/*
- * These are used to make use of C type-checking.
- * Entries in the pte table are 64b, while entries in the pgd & pmd are 32b.
- */
-
-/* PTE level */
-typedef struct { unsigned long pte; } pte_t;
-#define pte_val(x) ((x).pte)
-#define __pte(x) ((pte_t) { (x) })
-
-/* 64k pages additionally define a bigger "real PTE" type that gathers
- * the "second half" part of the PTE for pseudo 64k pages
- */
-#ifdef CONFIG_PPC_64K_PAGES
-typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
-#else
-typedef struct { pte_t pte; } real_pte_t;
-#endif
-
-/* PMD level */
-typedef struct { unsigned long pmd; } pmd_t;
-#define pmd_val(x) ((x).pmd)
-#define __pmd(x) ((pmd_t) { (x) })
-
-/* PUD level exusts only on 4k pages */
-#ifndef CONFIG_PPC_64K_PAGES
-typedef struct { unsigned long pud; } pud_t;
-#define pud_val(x) ((x).pud)
-#define __pud(x) ((pud_t) { (x) })
-#endif
-
-/* PGD level */
-typedef struct { unsigned long pgd; } pgd_t;
-#define pgd_val(x) ((x).pgd)
-#define __pgd(x) ((pgd_t) { (x) })
-
-/* Page protection bits */
-typedef struct { unsigned long pgprot; } pgprot_t;
-#define pgprot_val(x) ((x).pgprot)
-#define __pgprot(x) ((pgprot_t) { (x) })
-
-#else
-
-/*
- * .. while these make it easier on the compiler
- */
-
-typedef unsigned long pte_t;
-#define pte_val(x) (x)
-#define __pte(x) (x)
-
-#ifdef CONFIG_PPC_64K_PAGES
-typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
-#else
-typedef unsigned long real_pte_t;
-#endif
-
-
-typedef unsigned long pmd_t;
-#define pmd_val(x) (x)
-#define __pmd(x) (x)
-
-#ifndef CONFIG_PPC_64K_PAGES
-typedef unsigned long pud_t;
-#define pud_val(x) (x)
-#define __pud(x) (x)
-#endif
-
-typedef unsigned long pgd_t;
-#define pgd_val(x) (x)
-#define pgprot_val(x) (x)
-
-typedef unsigned long pgprot_t;
-#define __pgd(x) (x)
-#define __pgprot(x) (x)
-
-#endif
-
-#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
-
-extern int page_is_ram(unsigned long pfn);
-
-extern u64 ppc64_pft_size; /* Log 2 of page table size */
-
-/* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */
-#define __HAVE_ARCH_GATE_AREA 1
-
-#endif /* __ASSEMBLY__ */
-
-#ifdef MODULE
-#define __page_aligned __attribute__((__aligned__(PAGE_SIZE)))
-#else
-#define __page_aligned \
- __attribute__((__aligned__(PAGE_SIZE), \
- __section__(".data.page_aligned")))
-#endif
-
-
-/* This must match the -Ttext linker address */
-/* Note: tophys & tovirt make assumptions about how */
-/* KERNELBASE is defined for performance reasons. */
-/* When KERNELBASE moves, those macros may have */
-/* to change! */
-#define PAGE_OFFSET ASM_CONST(0xC000000000000000)
-#define KERNELBASE PAGE_OFFSET
-#define VMALLOCBASE ASM_CONST(0xD000000000000000)
-
-#define VMALLOC_REGION_ID (VMALLOCBASE >> REGION_SHIFT)
-#define KERNEL_REGION_ID (KERNELBASE >> REGION_SHIFT)
-#define USER_REGION_ID (0UL)
-#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
-
-#define __va(x) ((void *)((unsigned long)(x) + KERNELBASE))
-
-#ifdef CONFIG_FLATMEM
-#define pfn_to_page(pfn) (mem_map + (pfn))
-#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
-#define pfn_valid(pfn) ((pfn) < max_mapnr)
-#endif
-
-#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
-
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-
-/*
- * Unfortunately the PLT is in the BSS in the PPC32 ELF ABI,
- * and needs to be executable. This means the whole heap ends
- * up being executable.
- */
-#define VM_DATA_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_DATA_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_DATA_DEFAULT_FLAGS \
- (test_thread_flag(TIF_32BIT) ? \
- VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
-
-/*
- * This is the default if a program doesn't have a PT_GNU_STACK
- * program header entry. The PPC64 ELF ABI has a non executable stack
- * stack by default, so in the absense of a PT_GNU_STACK program header
- * we turn execute permission off.
- */
-#define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_STACK_DEFAULT_FLAGS \
- (test_thread_flag(TIF_32BIT) ? \
- VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
-
-#endif /* __KERNEL__ */
-
-#include <asm-generic/page.h>
-
-#endif /* _PPC64_PAGE_H */
projects / kernel / kernel-generic.git / commitdiff