1 source "arch/powerpc/platforms/Kconfig.cputype"
20 config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
23 config ARCH_DMA_ADDR_T_64BIT
24 def_bool ARCH_PHYS_ADDR_T_64BIT
30 config HAVE_SETUP_PER_CPU_AREA
33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
37 int "Number of virtual interrupt numbers"
41 This defines the number of virtual interrupt numbers the kernel
42 can manage. Virtual interrupt numbers are what you see in
43 /proc/interrupts. If you configure your system to have too few,
44 drivers will fail to load or worse - handle with care.
46 config STACKTRACE_SUPPORT
50 config HAVE_LATENCYTOP_SUPPORT
53 config TRACE_IRQFLAGS_SUPPORT
57 config LOCKDEP_SUPPORT
61 config RWSEM_GENERIC_SPINLOCK
64 config RWSEM_XCHGADD_ALGORITHM
68 config GENERIC_LOCKBREAK
71 depends on SMP && PREEMPT
73 config ARCH_HAS_ILOG2_U32
77 config ARCH_HAS_ILOG2_U64
81 config GENERIC_HWEIGHT
88 select ARCH_MIGHT_HAVE_PC_PARPORT
91 select OF_EARLY_FLATTREE
92 select HAVE_FTRACE_MCOUNT_RECORD
93 select HAVE_DYNAMIC_FTRACE
94 select HAVE_FUNCTION_TRACER
95 select HAVE_FUNCTION_GRAPH_TRACER
96 select SYSCTL_EXCEPTION_TRACE
97 select ARCH_WANT_OPTIONAL_GPIOLIB
98 select VIRT_TO_BUS if !PPC64
100 select HAVE_IOREMAP_PROT
101 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
103 select HAVE_ARCH_KGDB
104 select HAVE_KRETPROBES
105 select HAVE_ARCH_TRACEHOOK
107 select HAVE_MEMBLOCK_NODE_MAP
108 select HAVE_DMA_ATTRS
109 select HAVE_DMA_API_DEBUG
111 select HAVE_DEBUG_KMEMLEAK
112 select GENERIC_ATOMIC64 if PPC32
113 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
114 select HAVE_PERF_EVENTS
115 select HAVE_REGS_AND_STACK_ACCESS_API
116 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
117 select ARCH_WANT_IPC_PARSE_VERSION
120 select GENERIC_IRQ_SHOW
121 select GENERIC_IRQ_SHOW_LEVEL
122 select IRQ_FORCED_THREADING
123 select HAVE_RCU_TABLE_FREE if SMP
124 select HAVE_SYSCALL_TRACEPOINTS
125 select HAVE_BPF_JIT if PPC64
126 select HAVE_ARCH_JUMP_LABEL
127 select ARCH_HAVE_NMI_SAFE_CMPXCHG
128 select GENERIC_SMP_IDLE_THREAD
129 select GENERIC_CMOS_UPDATE
130 select GENERIC_TIME_VSYSCALL_OLD
131 select GENERIC_CLOCKEVENTS
132 select GENERIC_STRNCPY_FROM_USER
133 select GENERIC_STRNLEN_USER
134 select HAVE_MOD_ARCH_SPECIFIC
135 select MODULES_USE_ELF_RELA
136 select CLONE_BACKWARDS
137 select ARCH_USE_BUILTIN_BSWAP
138 select OLD_SIGSUSPEND
139 select OLD_SIGACTION if PPC32
140 select HAVE_DEBUG_STACKOVERFLOW
141 select HAVE_IRQ_EXIT_ON_IRQ_STACK
144 def_bool CPU_LITTLE_ENDIAN
153 select COMPAT_BINFMT_ELF
154 select ARCH_WANT_OLD_COMPAT_IPC
155 select COMPAT_OLD_SIGACTION
157 config SYSVIPC_COMPAT
159 depends on COMPAT && SYSVIPC
162 # All PPC32s use generic nvram driver through ppc_md
167 config SCHED_OMIT_FRAME_POINTER
171 config ARCH_MAY_HAVE_PC_FDC
173 default !PPC_PSERIES || PCI
178 config PPC_UDBG_16550
182 config GENERIC_TBSYNC
184 default y if PPC32 && SMP
196 config SYS_SUPPORTS_APM_EMULATION
197 default y if PMAC_APM_EMU
203 Used to allow a board to specify it wants an ePAPR compliant wrapper.
206 config DEFAULT_UIMAGE
209 Used to allow a board to specify it wants a uImage built by default
215 config ARCH_HIBERNATION_POSSIBLE
219 config ARCH_SUSPEND_POSSIBLE
221 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
222 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
225 config PPC_DCR_NATIVE
235 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
238 config PPC_OF_PLATFORM_PCI
241 depends on PPC64 # not supported on 32 bits yet
244 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
247 config ARCH_SUPPORTS_UPROBES
250 config PPC_ADV_DEBUG_REGS
252 depends on 40x || BOOKE
255 config PPC_ADV_DEBUG_IACS
257 depends on PPC_ADV_DEBUG_REGS
261 config PPC_ADV_DEBUG_DACS
263 depends on PPC_ADV_DEBUG_REGS
266 config PPC_ADV_DEBUG_DVCS
268 depends on PPC_ADV_DEBUG_REGS
272 config PPC_ADV_DEBUG_DAC_RANGE
274 depends on PPC_ADV_DEBUG_REGS && 44x
277 config PPC_EMULATE_SSTEP
279 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
281 source "init/Kconfig"
283 source "kernel/Kconfig.freezer"
285 source "arch/powerpc/sysdev/Kconfig"
286 source "arch/powerpc/platforms/Kconfig"
288 menu "Kernel options"
291 bool "High memory support"
294 source kernel/Kconfig.hz
295 source kernel/Kconfig.preempt
296 source "fs/Kconfig.binfmt"
298 config HUGETLB_PAGE_SIZE_VARIABLE
300 depends on HUGETLB_PAGE
303 config MATH_EMULATION
304 bool "Math emulation"
305 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
307 Some PowerPC chips designed for embedded applications do not have
308 a floating-point unit and therefore do not implement the
309 floating-point instructions in the PowerPC instruction set. If you
310 say Y here, the kernel will include code to emulate a floating-point
311 unit, which will allow programs that use floating-point
314 This is also useful to emulate missing (optional) instructions
315 such as fsqrt on cores that do have an FPU but do not implement
316 them (such as Freescale BookE).
319 prompt "Math emulation options"
320 default MATH_EMULATION_FULL
321 depends on MATH_EMULATION
323 config MATH_EMULATION_FULL
324 bool "Emulate all the floating point instructions"
326 Select this option will enable the kernel to support to emulate
327 all the floating point instructions. If your SoC doesn't have
328 a FPU, you should select this.
330 config MATH_EMULATION_HW_UNIMPLEMENTED
331 bool "Just emulate the FPU unimplemented instructions"
333 Select this if you know there does have a hardware FPU on your
334 SoC, but some floating point instructions are not implemented by that.
338 config PPC_TRANSACTIONAL_MEM
339 bool "Transactional Memory support for POWERPC"
340 depends on PPC_BOOK3S_64
344 Support user-mode Transactional Memory on POWERPC.
350 bool "SWIOTLB support"
354 Support for IO bounce buffering for systems without an IOMMU.
355 This allows us to DMA to the full physical address space on
356 platforms where the size of a physical address is larger
357 than the bus address. Not all platforms support this.
360 bool "Support for enabling/disabling CPUs"
361 depends on SMP && (PPC_PSERIES || \
362 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
364 Say Y here to be able to disable and re-enable individual
365 CPUs at runtime on SMP machines.
367 Say N if you are unsure.
369 config ARCH_CPU_PROBE_RELEASE
371 depends on HOTPLUG_CPU
373 config ARCH_ENABLE_MEMORY_HOTPLUG
376 config ARCH_HAS_WALK_MEMORY
379 config ARCH_ENABLE_MEMORY_HOTREMOVE
383 bool "kexec system call"
384 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
386 kexec is a system call that implements the ability to shutdown your
387 current kernel, and to start another kernel. It is like a reboot
388 but it is independent of the system firmware. And like a reboot
389 you can start any kernel with it, not just Linux.
391 The name comes from the similarity to the exec system call.
393 It is an ongoing process to be certain the hardware in a machine
394 is properly shutdown, so do not be surprised if this code does not
395 initially work for you. As of this writing the exact hardware
396 interface is strongly in flux, so no good recommendation can be
400 bool "Build a kdump crash kernel"
401 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
402 select RELOCATABLE if PPC64 || 44x
403 select DYNAMIC_MEMSTART if FSL_BOOKE
405 Build a kernel suitable for use as a kdump capture kernel.
406 The same kernel binary can be used as production kernel and dump
410 bool "Firmware-assisted dump"
411 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
413 A robust mechanism to get reliable kernel crash dump with
414 assistance from firmware. This approach does not use kexec,
415 instead firmware assists in booting the kdump kernel
416 while preserving memory contents. Firmware-assisted dump
417 is meant to be a kdump replacement offering robustness and
418 speed not possible without system firmware assistance.
423 bool "Distribute interrupts on all CPUs by default"
426 This option gives the kernel permission to distribute IRQs across
427 multiple CPUs. Saying N here will route all IRQs to the first
428 CPU. Generally saying Y is safe, although some problems have been
429 reported with SMP Power Macintoshes with this option enabled.
434 default y if SMP && PPC_PSERIES
440 depends on NEED_MULTIPLE_NODES
442 config ARCH_SELECT_MEMORY_MODEL
446 config ARCH_FLATMEM_ENABLE
448 depends on (PPC64 && !NUMA) || PPC32
450 config ARCH_SPARSEMEM_ENABLE
453 select SPARSEMEM_VMEMMAP_ENABLE
455 config ARCH_SPARSEMEM_DEFAULT
457 depends on (SMP && PPC_PSERIES) || PPC_PS3
459 config SYS_SUPPORTS_HUGETLBFS
464 config ARCH_MEMORY_PROBE
466 depends on MEMORY_HOTPLUG
468 # Some NUMA nodes have memory ranges that span
469 # other nodes. Even though a pfn is valid and
470 # between a node's start and end pfns, it may not
471 # reside on that node. See memmap_init_zone()
473 config NODES_SPAN_OTHER_NODES
475 depends on NEED_MULTIPLE_NODES
477 config PPC_HAS_HASH_64K
483 bool "Using standard binutils settings"
487 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
488 Note, that kernel will be able to run only those applications,
489 which had been compiled using binutils later than 2.17.50.0.3 with
490 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
491 the older binutils, you can patch them with a trivial patch, which
492 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
498 Select the kernel logical page size. Increasing the page size
499 will reduce software overhead at each page boundary, allow
500 hardware prefetch mechanisms to be more effective, and allow
501 larger dma transfers increasing IO efficiency and reducing
502 overhead. However the utilization of memory will increase.
503 For example, each cached file will using a multiple of the
504 page size to hold its contents and the difference between the
505 end of file and the end of page is wasted.
507 Some dedicated systems, such as software raid serving with
508 accelerated calculations, have shown significant increases.
510 If you configure a 64 bit kernel for 64k pages but the
511 processor does not support them, then the kernel will simulate
512 them with 4k pages, loading them on demand, but with the
513 reduced software overhead and larger internal fragmentation.
514 For the 32 bit kernel, a large page option will not be offered
515 unless it is supported by the configured processor.
517 If unsure, choose 4K_PAGES.
523 bool "16k page size" if 44x
526 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
527 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
529 config PPC_256K_PAGES
530 bool "256k page size" if 44x
531 depends on !STDBINUTILS
533 Make the page size 256k.
535 As the ELF standard only requires alignment to support page
536 sizes up to 64k, you will need to compile all of your user
537 space applications with a non-standard binutils settings
538 (see the STDBINUTILS description for details).
540 Say N unless you know what you are doing.
544 config FORCE_MAX_ZONEORDER
545 int "Maximum zone order"
546 range 9 64 if PPC64 && PPC_64K_PAGES
547 default "9" if PPC64 && PPC_64K_PAGES
548 range 13 64 if PPC64 && !PPC_64K_PAGES
549 default "13" if PPC64 && !PPC_64K_PAGES
550 range 9 64 if PPC32 && PPC_16K_PAGES
551 default "9" if PPC32 && PPC_16K_PAGES
552 range 7 64 if PPC32 && PPC_64K_PAGES
553 default "7" if PPC32 && PPC_64K_PAGES
554 range 5 64 if PPC32 && PPC_256K_PAGES
555 default "5" if PPC32 && PPC_256K_PAGES
559 The kernel memory allocator divides physically contiguous memory
560 blocks into "zones", where each zone is a power of two number of
561 pages. This option selects the largest power of two that the kernel
562 keeps in the memory allocator. If you need to allocate very large
563 blocks of physically contiguous memory, then you may need to
566 This config option is actually maximum order plus one. For example,
567 a value of 11 means that the largest free memory block is 2^10 pages.
569 The page size is not necessarily 4KB. For example, on 64-bit
570 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
571 this in mind when choosing a value for this option.
573 config PPC_SUBPAGE_PROT
574 bool "Support setting protections for 4k subpages"
575 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
577 This option adds support for a system call to allow user programs
578 to set access permissions (read/write, readonly, or no access)
579 on the 4k subpages of each 64k page.
582 bool "SMT (Hyperthreading) scheduler support"
583 depends on PPC64 && SMP
585 SMT scheduler support improves the CPU scheduler's decision making
586 when dealing with POWER5 cpus at a cost of slightly increased
587 overhead in some places. If unsure say N here.
589 config PPC_DENORMALISATION
590 bool "PowerPC denormalisation exception handling"
591 depends on PPC_BOOK3S_64
592 default "y" if PPC_POWERNV
594 Add support for handling denormalisation of single precision
595 values. Useful for bare metal only. If unsure say Y here.
598 bool "Default bootloader kernel arguments"
601 string "Initial kernel command string"
602 depends on CMDLINE_BOOL
603 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
605 On some platforms, there is currently no way for the boot loader to
606 pass arguments to the kernel. For these platforms, you can supply
607 some command-line options at build time by entering them here. In
608 most cases you will need to specify the root device here.
611 string "Additional default image types"
613 List additional targets to be built by the bootwrapper here (separated
614 by spaces). This is useful for targets that depend of device tree
615 files in the .dts directory.
617 Targets in this list will be build as part of the default build
618 target, or when the user does a 'make zImage' or a
619 'make zImage.initrd'.
621 If unsure, leave blank
623 config ARCH_WANTS_FREEZER_CONTROL
627 source kernel/power/Kconfig
630 bool "Enable seccomp to safely compute untrusted bytecode"
634 This kernel feature is useful for number crunching applications
635 that may need to compute untrusted bytecode during their
636 execution. By using pipes or other transports made available to
637 the process as file descriptors supporting the read/write
638 syscalls, it's possible to isolate those applications in
639 their own address space using seccomp. Once seccomp is
640 enabled via /proc/<pid>/seccomp, it cannot be disabled
641 and the task is only allowed to execute a few safe syscalls
642 defined by each seccomp mode.
644 If unsure, say Y. Only embedded should say N here.
655 bool "Support for ISA-bus hardware"
659 Find out whether you have ISA slots on your motherboard. ISA is the
660 name of a bus system, i.e. the way the CPU talks to the other stuff
661 inside your box. If you have an Apple machine, say N here; if you
662 have an IBM RS/6000 or pSeries machine, say Y. If you have an
663 embedded board, consult your board documentation.
669 config NEED_DMA_MAP_STATE
670 def_bool (PPC64 || NOT_COHERENT_CACHE)
672 config NEED_SG_DMA_LENGTH
675 config GENERIC_ISA_DMA
677 depends on ISA_DMA_API
680 config PPC_INDIRECT_PCI
683 default y if 40x || 44x
697 select PPC_INDIRECT_PCI
703 depends on SUSPEND && (PPC_85xx || PPC_86xx)
705 Freescale MPC85xx/MPC86xx power management controller support
706 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
711 depends on SUSPEND && (44x || 40x)
713 PPC4xx Clock Power Management (CPM) support (suspend/resume).
714 It also enables support for two different idle states (idle-wait
721 bool "Freescale Local Bus support"
724 Enables reporting of errors from the Freescale local bus
725 controller. Also contains some common code used by
726 drivers for specific local bus peripherals.
734 depends on PPC_83xx || QUICC_ENGINE || CPM2
736 Freescale General-purpose Timers support
738 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
742 # Platforms that what PCI turned unconditionally just do select PCI
743 # in their config node. Platforms that want to choose at config
744 # time should select PPC_PCI_CHOICE
745 config PPC_PCI_CHOICE
749 bool "PCI support" if PPC_PCI_CHOICE
750 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
751 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
752 default PCI_QSPAN if !4xx && !CPM2 && 8xx
753 select GENERIC_PCI_IOMAP
755 Find out whether your system includes a PCI bus. PCI is the name of
756 a bus system, i.e. the way the CPU talks to the other stuff inside
757 your box. If you say Y here, the kernel will include drivers and
758 infrastructure code to support PCI bus devices.
768 depends on !4xx && !CPM2 && 8xx
771 Say Y here if you have a system based on a Motorola 8xx-series
772 embedded processor with a QSPAN PCI interface, otherwise say N.
776 depends on PCI && 8260
777 select PPC_INDIRECT_PCI
780 source "drivers/pci/pcie/Kconfig"
782 source "drivers/pci/Kconfig"
784 source "drivers/pcmcia/Kconfig"
786 source "drivers/pci/hotplug/Kconfig"
793 bool "RapidIO support"
794 depends on HAS_RAPIDIO || PCI
796 If you say Y here, the kernel will include drivers and
797 infrastructure code to support RapidIO interconnect devices.
800 bool "Freescale Embedded SRIO Controller support"
801 depends on RAPIDIO && HAS_RAPIDIO
804 Include support for RapidIO controller on Freescale embedded
805 processors (MPC8548, MPC8641, etc).
807 source "drivers/rapidio/Kconfig"
811 config NONSTATIC_KERNEL
815 menu "Advanced setup"
818 config ADVANCED_OPTIONS
819 bool "Prompt for advanced kernel configuration options"
821 This option will enable prompting for a variety of advanced kernel
822 configuration options. These options can cause the kernel to not
823 work if they are set incorrectly, but can be used to optimize certain
824 aspects of kernel memory management.
826 Unless you know what you are doing, say N here.
828 comment "Default settings for advanced configuration options are used"
829 depends on !ADVANCED_OPTIONS
831 config LOWMEM_SIZE_BOOL
832 bool "Set maximum low memory"
833 depends on ADVANCED_OPTIONS
835 This option allows you to set the maximum amount of memory which
836 will be used as "low memory", that is, memory which the kernel can
837 access directly, without having to set up a kernel virtual mapping.
838 This can be useful in optimizing the layout of kernel virtual
841 Say N here unless you know what you are doing.
844 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
847 config LOWMEM_CAM_NUM_BOOL
848 bool "Set number of CAMs to use to map low memory"
849 depends on ADVANCED_OPTIONS && FSL_BOOKE
851 This option allows you to set the maximum number of CAM slots that
852 will be used to map low memory. There are a limited number of slots
853 available and even more limited number that will fit in the L1 MMU.
854 However, using more entries will allow mapping more low memory. This
855 can be useful in optimizing the layout of kernel virtual memory.
857 Say N here unless you know what you are doing.
859 config LOWMEM_CAM_NUM
861 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
864 config DYNAMIC_MEMSTART
865 bool "Enable page aligned dynamic load address for kernel"
866 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
867 select NONSTATIC_KERNEL
869 This option enables the kernel to be loaded at any page aligned
870 physical address. The kernel creates a mapping from KERNELBASE to
871 the address where the kernel is loaded. The page size here implies
872 the TLB page size of the mapping for kernel on the particular platform.
873 Please refer to the init code for finding the TLB page size.
875 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
876 kernel image, where the only restriction is the page aligned kernel
877 load address. When this option is enabled, the compile time physical
878 address CONFIG_PHYSICAL_START is ignored.
880 This option is overridden by CONFIG_RELOCATABLE
883 bool "Build a relocatable kernel"
884 depends on ADVANCED_OPTIONS && FLATMEM && 44x
885 select NONSTATIC_KERNEL
887 This builds a kernel image that is capable of running at the
888 location the kernel is loaded at, without any alignment restrictions.
889 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
891 One use is for the kexec on panic case where the recovery kernel
892 must live at a different physical address than the primary
895 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
896 it has been loaded at and the compile time physical addresses
897 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
898 setting can still be useful to bootwrappers that need to know the
899 load address of the kernel (eg. u-boot/mkimage).
901 config RELOCATABLE_PPC32
903 depends on PPC32 && RELOCATABLE
905 config PAGE_OFFSET_BOOL
906 bool "Set custom page offset address"
907 depends on ADVANCED_OPTIONS
909 This option allows you to set the kernel virtual address at which
910 the kernel will map low memory. This can be useful in optimizing
911 the virtual memory layout of the system.
913 Say N here unless you know what you are doing.
916 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
919 config KERNEL_START_BOOL
920 bool "Set custom kernel base address"
921 depends on ADVANCED_OPTIONS
923 This option allows you to set the kernel virtual address at which
924 the kernel will be loaded. Normally this should match PAGE_OFFSET
925 however there are times (like kdump) that one might not want them
928 Say N here unless you know what you are doing.
931 hex "Virtual address of kernel base" if KERNEL_START_BOOL
932 default PAGE_OFFSET if PAGE_OFFSET_BOOL
933 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
936 config PHYSICAL_START_BOOL
937 bool "Set physical address where the kernel is loaded"
938 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
940 This gives the physical address where the kernel is loaded.
942 Say N here unless you know what you are doing.
944 config PHYSICAL_START
945 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
946 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
949 config PHYSICAL_ALIGN
951 default "0x04000000" if FSL_BOOKE
953 This value puts the alignment restrictions on physical address
954 where kernel is loaded and run from. Kernel is compiled for an
955 address which meets above alignment restriction.
957 config TASK_SIZE_BOOL
958 bool "Set custom user task size"
959 depends on ADVANCED_OPTIONS
961 This option allows you to set the amount of virtual address space
962 allocated to user tasks. This can be useful in optimizing the
963 virtual memory layout of the system.
965 Say N here unless you know what you are doing.
968 hex "Size of user task space" if TASK_SIZE_BOOL
969 default "0x80000000" if PPC_8xx
972 config CONSISTENT_SIZE_BOOL
973 bool "Set custom consistent memory pool size"
974 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
976 This option allows you to set the size of the
977 consistent memory pool. This pool of virtual memory
978 is used to make consistent memory allocations.
980 config CONSISTENT_SIZE
981 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
982 default "0x00200000" if NOT_COHERENT_CACHE
985 bool "Pinned Kernel TLBs (860 ONLY)"
986 depends on ADVANCED_OPTIONS && 8xx
991 bool "Build a relocatable kernel"
992 select NONSTATIC_KERNEL
994 This builds a kernel image that is capable of running anywhere
995 in the RMA (real memory area) at any 16k-aligned base address.
996 The kernel is linked as a position-independent executable (PIE)
997 and contains dynamic relocations which are processed early
998 in the bootup process.
1000 One use is for the kexec on panic case where the recovery kernel
1001 must live at a different physical address than the primary
1004 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1007 default "0xc000000000000000"
1010 default "0xc000000000000000"
1011 config PHYSICAL_START
1013 default "0x00000000"
1019 source "net/Kconfig"
1021 source "drivers/Kconfig"
1025 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1027 source "lib/Kconfig"
1029 source "arch/powerpc/Kconfig.debug"
1031 source "security/Kconfig"
1035 depends on COMPAT && KEYS
1038 source "crypto/Kconfig"
1045 config PPC_LIB_RHEAP
1048 source "arch/powerpc/kvm/Kconfig"