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
89 select ARCH_MIGHT_HAVE_PC_SERIO
92 select OF_EARLY_FLATTREE
93 select HAVE_FTRACE_MCOUNT_RECORD
94 select HAVE_DYNAMIC_FTRACE
95 select HAVE_FUNCTION_TRACER
96 select HAVE_FUNCTION_GRAPH_TRACER
97 select SYSCTL_EXCEPTION_TRACE
98 select ARCH_WANT_OPTIONAL_GPIOLIB
99 select VIRT_TO_BUS if !PPC64
101 select HAVE_IOREMAP_PROT
102 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
104 select HAVE_ARCH_KGDB
105 select HAVE_KRETPROBES
106 select HAVE_ARCH_TRACEHOOK
108 select HAVE_MEMBLOCK_NODE_MAP
109 select HAVE_DMA_ATTRS
110 select HAVE_DMA_API_DEBUG
112 select HAVE_DEBUG_KMEMLEAK
113 select GENERIC_ATOMIC64 if PPC32
114 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
115 select HAVE_PERF_EVENTS
116 select HAVE_REGS_AND_STACK_ACCESS_API
117 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
118 select ARCH_WANT_IPC_PARSE_VERSION
121 select GENERIC_IRQ_SHOW
122 select GENERIC_IRQ_SHOW_LEVEL
123 select IRQ_FORCED_THREADING
124 select HAVE_RCU_TABLE_FREE if SMP
125 select HAVE_SYSCALL_TRACEPOINTS
126 select HAVE_BPF_JIT if PPC64
127 select HAVE_ARCH_JUMP_LABEL
128 select ARCH_HAVE_NMI_SAFE_CMPXCHG
129 select GENERIC_SMP_IDLE_THREAD
130 select GENERIC_CMOS_UPDATE
131 select GENERIC_TIME_VSYSCALL_OLD
132 select GENERIC_CLOCKEVENTS
133 select GENERIC_STRNCPY_FROM_USER
134 select GENERIC_STRNLEN_USER
135 select HAVE_MOD_ARCH_SPECIFIC
136 select MODULES_USE_ELF_RELA
137 select CLONE_BACKWARDS
138 select ARCH_USE_BUILTIN_BSWAP
139 select OLD_SIGSUSPEND
140 select OLD_SIGACTION if PPC32
141 select HAVE_DEBUG_STACKOVERFLOW
142 select HAVE_IRQ_EXIT_ON_IRQ_STACK
143 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
146 def_bool CPU_LITTLE_ENDIAN
159 select COMPAT_BINFMT_ELF
160 select ARCH_WANT_OLD_COMPAT_IPC
161 select COMPAT_OLD_SIGACTION
163 config SYSVIPC_COMPAT
165 depends on COMPAT && SYSVIPC
168 # All PPC32s use generic nvram driver through ppc_md
173 config SCHED_OMIT_FRAME_POINTER
177 config ARCH_MAY_HAVE_PC_FDC
179 default !PPC_PSERIES || PCI
184 config PPC_UDBG_16550
188 config GENERIC_TBSYNC
190 default y if PPC32 && SMP
202 config SYS_SUPPORTS_APM_EMULATION
203 default y if PMAC_APM_EMU
209 Used to allow a board to specify it wants an ePAPR compliant wrapper.
212 config DEFAULT_UIMAGE
215 Used to allow a board to specify it wants a uImage built by default
218 config ARCH_HIBERNATION_POSSIBLE
222 config ARCH_SUSPEND_POSSIBLE
224 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
225 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
228 config PPC_DCR_NATIVE
238 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
241 config PPC_OF_PLATFORM_PCI
244 depends on PPC64 # not supported on 32 bits yet
247 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
250 config ARCH_SUPPORTS_UPROBES
253 config PPC_ADV_DEBUG_REGS
255 depends on 40x || BOOKE
258 config PPC_ADV_DEBUG_IACS
260 depends on PPC_ADV_DEBUG_REGS
264 config PPC_ADV_DEBUG_DACS
266 depends on PPC_ADV_DEBUG_REGS
269 config PPC_ADV_DEBUG_DVCS
271 depends on PPC_ADV_DEBUG_REGS
275 config PPC_ADV_DEBUG_DAC_RANGE
277 depends on PPC_ADV_DEBUG_REGS && 44x
280 config PPC_EMULATE_SSTEP
282 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
284 source "init/Kconfig"
286 source "kernel/Kconfig.freezer"
288 source "arch/powerpc/sysdev/Kconfig"
289 source "arch/powerpc/platforms/Kconfig"
291 menu "Kernel options"
294 bool "High memory support"
297 source kernel/Kconfig.hz
298 source kernel/Kconfig.preempt
299 source "fs/Kconfig.binfmt"
301 config HUGETLB_PAGE_SIZE_VARIABLE
303 depends on HUGETLB_PAGE
306 config MATH_EMULATION
307 bool "Math emulation"
308 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
310 Some PowerPC chips designed for embedded applications do not have
311 a floating-point unit and therefore do not implement the
312 floating-point instructions in the PowerPC instruction set. If you
313 say Y here, the kernel will include code to emulate a floating-point
314 unit, which will allow programs that use floating-point
317 This is also useful to emulate missing (optional) instructions
318 such as fsqrt on cores that do have an FPU but do not implement
319 them (such as Freescale BookE).
322 prompt "Math emulation options"
323 default MATH_EMULATION_FULL
324 depends on MATH_EMULATION
326 config MATH_EMULATION_FULL
327 bool "Emulate all the floating point instructions"
329 Select this option will enable the kernel to support to emulate
330 all the floating point instructions. If your SoC doesn't have
331 a FPU, you should select this.
333 config MATH_EMULATION_HW_UNIMPLEMENTED
334 bool "Just emulate the FPU unimplemented instructions"
336 Select this if you know there does have a hardware FPU on your
337 SoC, but some floating point instructions are not implemented by that.
341 config PPC_TRANSACTIONAL_MEM
342 bool "Transactional Memory support for POWERPC"
343 depends on PPC_BOOK3S_64
347 Support user-mode Transactional Memory on POWERPC.
353 bool "SWIOTLB support"
357 Support for IO bounce buffering for systems without an IOMMU.
358 This allows us to DMA to the full physical address space on
359 platforms where the size of a physical address is larger
360 than the bus address. Not all platforms support this.
363 bool "Support for enabling/disabling CPUs"
364 depends on SMP && (PPC_PSERIES || \
365 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
367 Say Y here to be able to disable and re-enable individual
368 CPUs at runtime on SMP machines.
370 Say N if you are unsure.
372 config ARCH_CPU_PROBE_RELEASE
374 depends on HOTPLUG_CPU
376 config ARCH_ENABLE_MEMORY_HOTPLUG
379 config ARCH_HAS_WALK_MEMORY
382 config ARCH_ENABLE_MEMORY_HOTREMOVE
385 config PPC64_SUPPORTS_MEMORY_FAILURE
386 bool "Add support for memory hwpoison"
387 depends on PPC_BOOK3S_64
388 default "y" if PPC_POWERNV
389 select ARCH_SUPPORTS_MEMORY_FAILURE
392 bool "kexec system call"
393 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
395 kexec is a system call that implements the ability to shutdown your
396 current kernel, and to start another kernel. It is like a reboot
397 but it is independent of the system firmware. And like a reboot
398 you can start any kernel with it, not just Linux.
400 The name comes from the similarity to the exec system call.
402 It is an ongoing process to be certain the hardware in a machine
403 is properly shutdown, so do not be surprised if this code does not
404 initially work for you. As of this writing the exact hardware
405 interface is strongly in flux, so no good recommendation can be
409 bool "Build a kdump crash kernel"
410 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
411 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
413 Build a kernel suitable for use as a kdump capture kernel.
414 The same kernel binary can be used as production kernel and dump
418 bool "Firmware-assisted dump"
419 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
421 A robust mechanism to get reliable kernel crash dump with
422 assistance from firmware. This approach does not use kexec,
423 instead firmware assists in booting the kdump kernel
424 while preserving memory contents. Firmware-assisted dump
425 is meant to be a kdump replacement offering robustness and
426 speed not possible without system firmware assistance.
431 bool "Distribute interrupts on all CPUs by default"
434 This option gives the kernel permission to distribute IRQs across
435 multiple CPUs. Saying N here will route all IRQs to the first
436 CPU. Generally saying Y is safe, although some problems have been
437 reported with SMP Power Macintoshes with this option enabled.
442 default y if SMP && PPC_PSERIES
448 depends on NEED_MULTIPLE_NODES
450 config ARCH_SELECT_MEMORY_MODEL
454 config ARCH_FLATMEM_ENABLE
456 depends on (PPC64 && !NUMA) || PPC32
458 config ARCH_SPARSEMEM_ENABLE
461 select SPARSEMEM_VMEMMAP_ENABLE
463 config ARCH_SPARSEMEM_DEFAULT
465 depends on (SMP && PPC_PSERIES) || PPC_PS3
467 config SYS_SUPPORTS_HUGETLBFS
472 config ARCH_MEMORY_PROBE
474 depends on MEMORY_HOTPLUG
476 # Some NUMA nodes have memory ranges that span
477 # other nodes. Even though a pfn is valid and
478 # between a node's start and end pfns, it may not
479 # reside on that node. See memmap_init_zone()
481 config NODES_SPAN_OTHER_NODES
483 depends on NEED_MULTIPLE_NODES
485 config PPC_HAS_HASH_64K
491 bool "Using standard binutils settings"
495 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
496 Note, that kernel will be able to run only those applications,
497 which had been compiled using binutils later than 2.17.50.0.3 with
498 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
499 the older binutils, you can patch them with a trivial patch, which
500 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
506 Select the kernel logical page size. Increasing the page size
507 will reduce software overhead at each page boundary, allow
508 hardware prefetch mechanisms to be more effective, and allow
509 larger dma transfers increasing IO efficiency and reducing
510 overhead. However the utilization of memory will increase.
511 For example, each cached file will using a multiple of the
512 page size to hold its contents and the difference between the
513 end of file and the end of page is wasted.
515 Some dedicated systems, such as software raid serving with
516 accelerated calculations, have shown significant increases.
518 If you configure a 64 bit kernel for 64k pages but the
519 processor does not support them, then the kernel will simulate
520 them with 4k pages, loading them on demand, but with the
521 reduced software overhead and larger internal fragmentation.
522 For the 32 bit kernel, a large page option will not be offered
523 unless it is supported by the configured processor.
525 If unsure, choose 4K_PAGES.
531 bool "16k page size" if 44x
534 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
535 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
537 config PPC_256K_PAGES
538 bool "256k page size" if 44x
539 depends on !STDBINUTILS
541 Make the page size 256k.
543 As the ELF standard only requires alignment to support page
544 sizes up to 64k, you will need to compile all of your user
545 space applications with a non-standard binutils settings
546 (see the STDBINUTILS description for details).
548 Say N unless you know what you are doing.
552 config FORCE_MAX_ZONEORDER
553 int "Maximum zone order"
554 range 9 64 if PPC64 && PPC_64K_PAGES
555 default "9" if PPC64 && PPC_64K_PAGES
556 range 13 64 if PPC64 && !PPC_64K_PAGES
557 default "13" if PPC64 && !PPC_64K_PAGES
558 range 9 64 if PPC32 && PPC_16K_PAGES
559 default "9" if PPC32 && PPC_16K_PAGES
560 range 7 64 if PPC32 && PPC_64K_PAGES
561 default "7" if PPC32 && PPC_64K_PAGES
562 range 5 64 if PPC32 && PPC_256K_PAGES
563 default "5" if PPC32 && PPC_256K_PAGES
567 The kernel memory allocator divides physically contiguous memory
568 blocks into "zones", where each zone is a power of two number of
569 pages. This option selects the largest power of two that the kernel
570 keeps in the memory allocator. If you need to allocate very large
571 blocks of physically contiguous memory, then you may need to
574 This config option is actually maximum order plus one. For example,
575 a value of 11 means that the largest free memory block is 2^10 pages.
577 The page size is not necessarily 4KB. For example, on 64-bit
578 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
579 this in mind when choosing a value for this option.
581 config PPC_SUBPAGE_PROT
582 bool "Support setting protections for 4k subpages"
583 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
585 This option adds support for a system call to allow user programs
586 to set access permissions (read/write, readonly, or no access)
587 on the 4k subpages of each 64k page.
590 bool "SMT (Hyperthreading) scheduler support"
591 depends on PPC64 && SMP
593 SMT scheduler support improves the CPU scheduler's decision making
594 when dealing with POWER5 cpus at a cost of slightly increased
595 overhead in some places. If unsure say N here.
597 config PPC_DENORMALISATION
598 bool "PowerPC denormalisation exception handling"
599 depends on PPC_BOOK3S_64
600 default "y" if PPC_POWERNV
602 Add support for handling denormalisation of single precision
603 values. Useful for bare metal only. If unsure say Y here.
606 bool "Default bootloader kernel arguments"
609 string "Initial kernel command string"
610 depends on CMDLINE_BOOL
611 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
613 On some platforms, there is currently no way for the boot loader to
614 pass arguments to the kernel. For these platforms, you can supply
615 some command-line options at build time by entering them here. In
616 most cases you will need to specify the root device here.
619 string "Additional default image types"
621 List additional targets to be built by the bootwrapper here (separated
622 by spaces). This is useful for targets that depend of device tree
623 files in the .dts directory.
625 Targets in this list will be build as part of the default build
626 target, or when the user does a 'make zImage' or a
627 'make zImage.initrd'.
629 If unsure, leave blank
631 config ARCH_WANTS_FREEZER_CONTROL
635 source kernel/power/Kconfig
638 bool "Enable seccomp to safely compute untrusted bytecode"
642 This kernel feature is useful for number crunching applications
643 that may need to compute untrusted bytecode during their
644 execution. By using pipes or other transports made available to
645 the process as file descriptors supporting the read/write
646 syscalls, it's possible to isolate those applications in
647 their own address space using seccomp. Once seccomp is
648 enabled via /proc/<pid>/seccomp, it cannot be disabled
649 and the task is only allowed to execute a few safe syscalls
650 defined by each seccomp mode.
652 If unsure, say Y. Only embedded should say N here.
663 bool "Support for ISA-bus hardware"
667 Find out whether you have ISA slots on your motherboard. ISA is the
668 name of a bus system, i.e. the way the CPU talks to the other stuff
669 inside your box. If you have an Apple machine, say N here; if you
670 have an IBM RS/6000 or pSeries machine, say Y. If you have an
671 embedded board, consult your board documentation.
677 config NEED_DMA_MAP_STATE
678 def_bool (PPC64 || NOT_COHERENT_CACHE)
680 config NEED_SG_DMA_LENGTH
683 config GENERIC_ISA_DMA
685 depends on ISA_DMA_API
688 config PPC_INDIRECT_PCI
691 default y if 40x || 44x
705 select PPC_INDIRECT_PCI
711 depends on SUSPEND && (PPC_85xx || PPC_86xx)
713 Freescale MPC85xx/MPC86xx power management controller support
714 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
719 depends on SUSPEND && (44x || 40x)
721 PPC4xx Clock Power Management (CPM) support (suspend/resume).
722 It also enables support for two different idle states (idle-wait
729 bool "Freescale Local Bus support"
732 Enables reporting of errors from the Freescale local bus
733 controller. Also contains some common code used by
734 drivers for specific local bus peripherals.
742 depends on PPC_83xx || QUICC_ENGINE || CPM2
744 Freescale General-purpose Timers support
746 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
750 # Platforms that what PCI turned unconditionally just do select PCI
751 # in their config node. Platforms that want to choose at config
752 # time should select PPC_PCI_CHOICE
753 config PPC_PCI_CHOICE
757 bool "PCI support" if PPC_PCI_CHOICE
758 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
759 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
760 default PCI_QSPAN if !4xx && !CPM2 && 8xx
761 select GENERIC_PCI_IOMAP
763 Find out whether your system includes a PCI bus. PCI is the name of
764 a bus system, i.e. the way the CPU talks to the other stuff inside
765 your box. If you say Y here, the kernel will include drivers and
766 infrastructure code to support PCI bus devices.
776 depends on !4xx && !CPM2 && 8xx
779 Say Y here if you have a system based on a Motorola 8xx-series
780 embedded processor with a QSPAN PCI interface, otherwise say N.
784 depends on PCI && 8260
785 select PPC_INDIRECT_PCI
788 source "drivers/pci/pcie/Kconfig"
790 source "drivers/pci/Kconfig"
792 source "drivers/pcmcia/Kconfig"
794 source "drivers/pci/hotplug/Kconfig"
801 tristate "RapidIO support"
802 depends on HAS_RAPIDIO || PCI
804 If you say Y here, the kernel will include drivers and
805 infrastructure code to support RapidIO interconnect devices.
808 bool "Freescale Embedded SRIO Controller support"
809 depends on RAPIDIO = y && HAS_RAPIDIO
812 Include support for RapidIO controller on Freescale embedded
813 processors (MPC8548, MPC8641, etc).
815 source "drivers/rapidio/Kconfig"
819 config NONSTATIC_KERNEL
823 menu "Advanced setup"
826 config ADVANCED_OPTIONS
827 bool "Prompt for advanced kernel configuration options"
829 This option will enable prompting for a variety of advanced kernel
830 configuration options. These options can cause the kernel to not
831 work if they are set incorrectly, but can be used to optimize certain
832 aspects of kernel memory management.
834 Unless you know what you are doing, say N here.
836 comment "Default settings for advanced configuration options are used"
837 depends on !ADVANCED_OPTIONS
839 config LOWMEM_SIZE_BOOL
840 bool "Set maximum low memory"
841 depends on ADVANCED_OPTIONS
843 This option allows you to set the maximum amount of memory which
844 will be used as "low memory", that is, memory which the kernel can
845 access directly, without having to set up a kernel virtual mapping.
846 This can be useful in optimizing the layout of kernel virtual
849 Say N here unless you know what you are doing.
852 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
855 config LOWMEM_CAM_NUM_BOOL
856 bool "Set number of CAMs to use to map low memory"
857 depends on ADVANCED_OPTIONS && FSL_BOOKE
859 This option allows you to set the maximum number of CAM slots that
860 will be used to map low memory. There are a limited number of slots
861 available and even more limited number that will fit in the L1 MMU.
862 However, using more entries will allow mapping more low memory. This
863 can be useful in optimizing the layout of kernel virtual memory.
865 Say N here unless you know what you are doing.
867 config LOWMEM_CAM_NUM
869 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
872 config DYNAMIC_MEMSTART
873 bool "Enable page aligned dynamic load address for kernel"
874 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
875 select NONSTATIC_KERNEL
877 This option enables the kernel to be loaded at any page aligned
878 physical address. The kernel creates a mapping from KERNELBASE to
879 the address where the kernel is loaded. The page size here implies
880 the TLB page size of the mapping for kernel on the particular platform.
881 Please refer to the init code for finding the TLB page size.
883 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
884 kernel image, where the only restriction is the page aligned kernel
885 load address. When this option is enabled, the compile time physical
886 address CONFIG_PHYSICAL_START is ignored.
888 This option is overridden by CONFIG_RELOCATABLE
891 bool "Build a relocatable kernel"
892 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
893 select NONSTATIC_KERNEL
895 This builds a kernel image that is capable of running at the
896 location the kernel is loaded at, without any alignment restrictions.
897 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
899 One use is for the kexec on panic case where the recovery kernel
900 must live at a different physical address than the primary
903 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
904 it has been loaded at and the compile time physical addresses
905 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
906 setting can still be useful to bootwrappers that need to know the
907 load address of the kernel (eg. u-boot/mkimage).
909 config RELOCATABLE_PPC32
911 depends on PPC32 && RELOCATABLE
913 config PAGE_OFFSET_BOOL
914 bool "Set custom page offset address"
915 depends on ADVANCED_OPTIONS
917 This option allows you to set the kernel virtual address at which
918 the kernel will map low memory. This can be useful in optimizing
919 the virtual memory layout of the system.
921 Say N here unless you know what you are doing.
924 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
927 config KERNEL_START_BOOL
928 bool "Set custom kernel base address"
929 depends on ADVANCED_OPTIONS
931 This option allows you to set the kernel virtual address at which
932 the kernel will be loaded. Normally this should match PAGE_OFFSET
933 however there are times (like kdump) that one might not want them
936 Say N here unless you know what you are doing.
939 hex "Virtual address of kernel base" if KERNEL_START_BOOL
940 default PAGE_OFFSET if PAGE_OFFSET_BOOL
941 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
944 config PHYSICAL_START_BOOL
945 bool "Set physical address where the kernel is loaded"
946 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
948 This gives the physical address where the kernel is loaded.
950 Say N here unless you know what you are doing.
952 config PHYSICAL_START
953 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
954 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
957 config PHYSICAL_ALIGN
959 default "0x04000000" if FSL_BOOKE
961 This value puts the alignment restrictions on physical address
962 where kernel is loaded and run from. Kernel is compiled for an
963 address which meets above alignment restriction.
965 config TASK_SIZE_BOOL
966 bool "Set custom user task size"
967 depends on ADVANCED_OPTIONS
969 This option allows you to set the amount of virtual address space
970 allocated to user tasks. This can be useful in optimizing the
971 virtual memory layout of the system.
973 Say N here unless you know what you are doing.
976 hex "Size of user task space" if TASK_SIZE_BOOL
977 default "0x80000000" if PPC_8xx
980 config CONSISTENT_SIZE_BOOL
981 bool "Set custom consistent memory pool size"
982 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
984 This option allows you to set the size of the
985 consistent memory pool. This pool of virtual memory
986 is used to make consistent memory allocations.
988 config CONSISTENT_SIZE
989 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
990 default "0x00200000" if NOT_COHERENT_CACHE
993 bool "Pinned Kernel TLBs (860 ONLY)"
994 depends on ADVANCED_OPTIONS && 8xx
999 bool "Build a relocatable kernel"
1000 select NONSTATIC_KERNEL
1002 This builds a kernel image that is capable of running anywhere
1003 in the RMA (real memory area) at any 16k-aligned base address.
1004 The kernel is linked as a position-independent executable (PIE)
1005 and contains dynamic relocations which are processed early
1006 in the bootup process.
1008 One use is for the kexec on panic case where the recovery kernel
1009 must live at a different physical address than the primary
1012 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1015 default "0xc000000000000000"
1018 default "0xc000000000000000"
1019 config PHYSICAL_START
1021 default "0x00000000"
1027 source "net/Kconfig"
1029 source "drivers/Kconfig"
1033 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1035 source "lib/Kconfig"
1037 source "arch/powerpc/Kconfig.debug"
1039 source "security/Kconfig"
1043 depends on COMPAT && KEYS
1046 source "crypto/Kconfig"
1053 config PPC_LIB_RHEAP
1056 source "arch/powerpc/kvm/Kconfig"