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
90 select OF_EARLY_FLATTREE
91 select HAVE_FTRACE_MCOUNT_RECORD
92 select HAVE_DYNAMIC_FTRACE
93 select HAVE_FUNCTION_TRACER
94 select HAVE_FUNCTION_GRAPH_TRACER
95 select SYSCTL_EXCEPTION_TRACE
96 select ARCH_WANT_OPTIONAL_GPIOLIB
97 select VIRT_TO_BUS if !PPC64
99 select HAVE_IOREMAP_PROT
100 select HAVE_EFFICIENT_UNALIGNED_ACCESS
102 select HAVE_ARCH_KGDB
103 select HAVE_KRETPROBES
104 select HAVE_ARCH_TRACEHOOK
106 select HAVE_MEMBLOCK_NODE_MAP
107 select HAVE_DMA_ATTRS
108 select HAVE_DMA_API_DEBUG
109 select USE_GENERIC_SMP_HELPERS if SMP
111 select HAVE_DEBUG_KMEMLEAK
112 select HAVE_SYSCALL_WRAPPERS if PPC64
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 HAVE_GENERIC_HARDIRQS
119 select ARCH_WANT_IPC_PARSE_VERSION
122 select GENERIC_IRQ_SHOW
123 select GENERIC_IRQ_SHOW_LEVEL
124 select IRQ_FORCED_THREADING
125 select HAVE_RCU_TABLE_FREE if SMP
126 select HAVE_SYSCALL_TRACEPOINTS
127 select HAVE_BPF_JIT if PPC64
128 select HAVE_ARCH_JUMP_LABEL
129 select ARCH_HAVE_NMI_SAFE_CMPXCHG
130 select GENERIC_SMP_IDLE_THREAD
131 select GENERIC_CMOS_UPDATE
132 select GENERIC_TIME_VSYSCALL_OLD
133 select GENERIC_CLOCKEVENTS
134 select GENERIC_STRNCPY_FROM_USER
135 select GENERIC_STRNLEN_USER
136 select HAVE_MOD_ARCH_SPECIFIC
137 select MODULES_USE_ELF_RELA
138 select CLONE_BACKWARDS
139 select ARCH_USE_BUILTIN_BSWAP
140 select OLD_SIGSUSPEND
141 select OLD_SIGACTION if PPC32
150 select COMPAT_BINFMT_ELF
151 select ARCH_WANT_OLD_COMPAT_IPC
152 select COMPAT_OLD_SIGACTION
154 config SYSVIPC_COMPAT
156 depends on COMPAT && SYSVIPC
159 # All PPC32s use generic nvram driver through ppc_md
164 config SCHED_OMIT_FRAME_POINTER
168 config ARCH_MAY_HAVE_PC_FDC
170 default !PPC_PSERIES || PCI
175 config PPC_UDBG_16550
179 config GENERIC_TBSYNC
181 default y if PPC32 && SMP
193 config SYS_SUPPORTS_APM_EMULATION
194 default y if PMAC_APM_EMU
200 Used to allow a board to specify it wants an ePAPR compliant wrapper.
203 config DEFAULT_UIMAGE
206 Used to allow a board to specify it wants a uImage built by default
212 config ARCH_HIBERNATION_POSSIBLE
216 config ARCH_SUSPEND_POSSIBLE
218 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
219 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
222 config PPC_DCR_NATIVE
232 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
235 config PPC_OF_PLATFORM_PCI
238 depends on PPC64 # not supported on 32 bits yet
241 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
244 config ARCH_SUPPORTS_UPROBES
247 config PPC_ADV_DEBUG_REGS
249 depends on 40x || BOOKE
252 config PPC_ADV_DEBUG_IACS
254 depends on PPC_ADV_DEBUG_REGS
258 config PPC_ADV_DEBUG_DACS
260 depends on PPC_ADV_DEBUG_REGS
263 config PPC_ADV_DEBUG_DVCS
265 depends on PPC_ADV_DEBUG_REGS
269 config PPC_ADV_DEBUG_DAC_RANGE
271 depends on PPC_ADV_DEBUG_REGS && 44x
274 config PPC_EMULATE_SSTEP
276 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
278 source "init/Kconfig"
280 source "kernel/Kconfig.freezer"
282 source "arch/powerpc/sysdev/Kconfig"
283 source "arch/powerpc/platforms/Kconfig"
285 menu "Kernel options"
288 bool "High memory support"
291 source kernel/Kconfig.hz
292 source kernel/Kconfig.preempt
293 source "fs/Kconfig.binfmt"
295 config HUGETLB_PAGE_SIZE_VARIABLE
297 depends on HUGETLB_PAGE
300 config MATH_EMULATION
301 bool "Math emulation"
302 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
304 Some PowerPC chips designed for embedded applications do not have
305 a floating-point unit and therefore do not implement the
306 floating-point instructions in the PowerPC instruction set. If you
307 say Y here, the kernel will include code to emulate a floating-point
308 unit, which will allow programs that use floating-point
311 config PPC_TRANSACTIONAL_MEM
312 bool "Transactional Memory support for POWERPC"
313 depends on PPC_BOOK3S_64
317 Support user-mode Transactional Memory on POWERPC.
319 config 8XX_MINIMAL_FPEMU
320 bool "Minimal math emulation for 8xx"
321 depends on 8xx && !MATH_EMULATION
323 Older arch/ppc kernels still emulated a few floating point
324 instructions such as load and store, even when full math
325 emulation is disabled. Say "Y" here if you want to preserve
328 It is recommended that you build a soft-float userspace instead.
334 bool "SWIOTLB support"
338 Support for IO bounce buffering for systems without an IOMMU.
339 This allows us to DMA to the full physical address space on
340 platforms where the size of a physical address is larger
341 than the bus address. Not all platforms support this.
344 bool "Support for enabling/disabling CPUs"
345 depends on SMP && HOTPLUG && (PPC_PSERIES || \
346 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
348 Say Y here to be able to disable and re-enable individual
349 CPUs at runtime on SMP machines.
351 Say N if you are unsure.
353 config ARCH_CPU_PROBE_RELEASE
355 depends on HOTPLUG_CPU
357 config ARCH_ENABLE_MEMORY_HOTPLUG
360 config ARCH_HAS_WALK_MEMORY
363 config ARCH_ENABLE_MEMORY_HOTREMOVE
367 bool "kexec system call"
368 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
370 kexec is a system call that implements the ability to shutdown your
371 current kernel, and to start another kernel. It is like a reboot
372 but it is independent of the system firmware. And like a reboot
373 you can start any kernel with it, not just Linux.
375 The name comes from the similarity to the exec system call.
377 It is an ongoing process to be certain the hardware in a machine
378 is properly shutdown, so do not be surprised if this code does not
379 initially work for you. It may help to enable device hotplugging
380 support. As of this writing the exact hardware interface is
381 strongly in flux, so no good recommendation can be made.
384 bool "Build a kdump crash kernel"
385 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
386 select RELOCATABLE if PPC64 || 44x
387 select DYNAMIC_MEMSTART if FSL_BOOKE
389 Build a kernel suitable for use as a kdump capture kernel.
390 The same kernel binary can be used as production kernel and dump
394 bool "Firmware-assisted dump"
395 depends on PPC64 && PPC_RTAS && CRASH_DUMP
397 A robust mechanism to get reliable kernel crash dump with
398 assistance from firmware. This approach does not use kexec,
399 instead firmware assists in booting the kdump kernel
400 while preserving memory contents. Firmware-assisted dump
401 is meant to be a kdump replacement offering robustness and
402 speed not possible without system firmware assistance.
407 bool "Distribute interrupts on all CPUs by default"
408 depends on SMP && !MV64360
410 This option gives the kernel permission to distribute IRQs across
411 multiple CPUs. Saying N here will route all IRQs to the first
412 CPU. Generally saying Y is safe, although some problems have been
413 reported with SMP Power Macintoshes with this option enabled.
418 default y if SMP && PPC_PSERIES
424 depends on NEED_MULTIPLE_NODES
426 config MAX_ACTIVE_REGIONS
428 default "256" if PPC64
431 config ARCH_SELECT_MEMORY_MODEL
435 config ARCH_FLATMEM_ENABLE
437 depends on (PPC64 && !NUMA) || PPC32
439 config ARCH_SPARSEMEM_ENABLE
442 select SPARSEMEM_VMEMMAP_ENABLE
444 config ARCH_SPARSEMEM_DEFAULT
446 depends on (SMP && PPC_PSERIES) || PPC_PS3
448 config SYS_SUPPORTS_HUGETLBFS
453 config ARCH_MEMORY_PROBE
455 depends on MEMORY_HOTPLUG
457 # Some NUMA nodes have memory ranges that span
458 # other nodes. Even though a pfn is valid and
459 # between a node's start and end pfns, it may not
460 # reside on that node. See memmap_init_zone()
462 config NODES_SPAN_OTHER_NODES
464 depends on NEED_MULTIPLE_NODES
466 config PPC_HAS_HASH_64K
472 bool "Using standard binutils settings"
476 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
477 Note, that kernel will be able to run only those applications,
478 which had been compiled using binutils later than 2.17.50.0.3 with
479 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
480 the older binutils, you can patch them with a trivial patch, which
481 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
487 Select the kernel logical page size. Increasing the page size
488 will reduce software overhead at each page boundary, allow
489 hardware prefetch mechanisms to be more effective, and allow
490 larger dma transfers increasing IO efficiency and reducing
491 overhead. However the utilization of memory will increase.
492 For example, each cached file will using a multiple of the
493 page size to hold its contents and the difference between the
494 end of file and the end of page is wasted.
496 Some dedicated systems, such as software raid serving with
497 accelerated calculations, have shown significant increases.
499 If you configure a 64 bit kernel for 64k pages but the
500 processor does not support them, then the kernel will simulate
501 them with 4k pages, loading them on demand, but with the
502 reduced software overhead and larger internal fragmentation.
503 For the 32 bit kernel, a large page option will not be offered
504 unless it is supported by the configured processor.
506 If unsure, choose 4K_PAGES.
512 bool "16k page size" if 44x
515 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
516 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
518 config PPC_256K_PAGES
519 bool "256k page size" if 44x
520 depends on !STDBINUTILS
522 Make the page size 256k.
524 As the ELF standard only requires alignment to support page
525 sizes up to 64k, you will need to compile all of your user
526 space applications with a non-standard binutils settings
527 (see the STDBINUTILS description for details).
529 Say N unless you know what you are doing.
533 config FORCE_MAX_ZONEORDER
534 int "Maximum zone order"
535 range 9 64 if PPC64 && PPC_64K_PAGES
536 default "9" if PPC64 && PPC_64K_PAGES
537 range 13 64 if PPC64 && !PPC_64K_PAGES
538 default "13" if PPC64 && !PPC_64K_PAGES
539 range 9 64 if PPC32 && PPC_16K_PAGES
540 default "9" if PPC32 && PPC_16K_PAGES
541 range 7 64 if PPC32 && PPC_64K_PAGES
542 default "7" if PPC32 && PPC_64K_PAGES
543 range 5 64 if PPC32 && PPC_256K_PAGES
544 default "5" if PPC32 && PPC_256K_PAGES
548 The kernel memory allocator divides physically contiguous memory
549 blocks into "zones", where each zone is a power of two number of
550 pages. This option selects the largest power of two that the kernel
551 keeps in the memory allocator. If you need to allocate very large
552 blocks of physically contiguous memory, then you may need to
555 This config option is actually maximum order plus one. For example,
556 a value of 11 means that the largest free memory block is 2^10 pages.
558 The page size is not necessarily 4KB. For example, on 64-bit
559 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
560 this in mind when choosing a value for this option.
562 config PPC_SUBPAGE_PROT
563 bool "Support setting protections for 4k subpages"
564 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
566 This option adds support for a system call to allow user programs
567 to set access permissions (read/write, readonly, or no access)
568 on the 4k subpages of each 64k page.
571 bool "SMT (Hyperthreading) scheduler support"
572 depends on PPC64 && SMP
574 SMT scheduler support improves the CPU scheduler's decision making
575 when dealing with POWER5 cpus at a cost of slightly increased
576 overhead in some places. If unsure say N here.
578 config PPC_DENORMALISATION
579 bool "PowerPC denormalisation exception handling"
580 depends on PPC_BOOK3S_64
583 Add support for handling denormalisation of single precision
584 values. Useful for bare metal only. If unsure say Y here.
587 bool "Default bootloader kernel arguments"
590 string "Initial kernel command string"
591 depends on CMDLINE_BOOL
592 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
594 On some platforms, there is currently no way for the boot loader to
595 pass arguments to the kernel. For these platforms, you can supply
596 some command-line options at build time by entering them here. In
597 most cases you will need to specify the root device here.
600 string "Additional default image types"
602 List additional targets to be built by the bootwrapper here (separated
603 by spaces). This is useful for targets that depend of device tree
604 files in the .dts directory.
606 Targets in this list will be build as part of the default build
607 target, or when the user does a 'make zImage' or a
608 'make zImage.initrd'.
610 If unsure, leave blank
612 config ARCH_WANTS_FREEZER_CONTROL
616 source kernel/power/Kconfig
619 bool "Enable seccomp to safely compute untrusted bytecode"
623 This kernel feature is useful for number crunching applications
624 that may need to compute untrusted bytecode during their
625 execution. By using pipes or other transports made available to
626 the process as file descriptors supporting the read/write
627 syscalls, it's possible to isolate those applications in
628 their own address space using seccomp. Once seccomp is
629 enabled via /proc/<pid>/seccomp, it cannot be disabled
630 and the task is only allowed to execute a few safe syscalls
631 defined by each seccomp mode.
633 If unsure, say Y. Only embedded should say N here.
644 bool "Support for ISA-bus hardware"
645 depends on PPC_PREP || PPC_CHRP
648 Find out whether you have ISA slots on your motherboard. ISA is the
649 name of a bus system, i.e. the way the CPU talks to the other stuff
650 inside your box. If you have an Apple machine, say N here; if you
651 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
652 you have an embedded board, consult your board documentation.
658 config NEED_DMA_MAP_STATE
659 def_bool (PPC64 || NOT_COHERENT_CACHE)
661 config NEED_SG_DMA_LENGTH
664 config GENERIC_ISA_DMA
666 depends on ISA_DMA_API
669 config PPC_INDIRECT_PCI
672 default y if 40x || 44x
683 select HAVE_CAN_FLEXCAN if NET && CAN
688 select PPC_INDIRECT_PCI
694 depends on SUSPEND && (PPC_85xx || PPC_86xx)
696 Freescale MPC85xx/MPC86xx power management controller support
697 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
702 depends on SUSPEND && (44x || 40x)
704 PPC4xx Clock Power Management (CPM) support (suspend/resume).
705 It also enables support for two different idle states (idle-wait
712 bool "Freescale Local Bus support"
715 Enables reporting of errors from the Freescale local bus
716 controller. Also contains some common code used by
717 drivers for specific local bus peripherals.
725 depends on PPC_83xx || QUICC_ENGINE || CPM2
727 Freescale General-purpose Timers support
729 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
733 # Platforms that what PCI turned unconditionally just do select PCI
734 # in their config node. Platforms that want to choose at config
735 # time should select PPC_PCI_CHOICE
736 config PPC_PCI_CHOICE
740 bool "PCI support" if PPC_PCI_CHOICE
741 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
742 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
743 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
744 default PCI_QSPAN if !4xx && !CPM2 && 8xx
745 select ARCH_SUPPORTS_MSI
746 select GENERIC_PCI_IOMAP
748 Find out whether your system includes a PCI bus. PCI is the name of
749 a bus system, i.e. the way the CPU talks to the other stuff inside
750 your box. If you say Y here, the kernel will include drivers and
751 infrastructure code to support PCI bus devices.
761 depends on !4xx && !CPM2 && 8xx
764 Say Y here if you have a system based on a Motorola 8xx-series
765 embedded processor with a QSPAN PCI interface, otherwise say N.
769 depends on PCI && 8260
770 select PPC_INDIRECT_PCI
774 bool "Enable workaround for MPC826x erratum PCI 9"
775 depends on PCI_8260 && !8272
778 source "drivers/pci/pcie/Kconfig"
780 source "drivers/pci/Kconfig"
782 source "drivers/pcmcia/Kconfig"
784 source "drivers/pci/hotplug/Kconfig"
791 bool "RapidIO support"
792 depends on HAS_RAPIDIO || PCI
794 If you say Y here, the kernel will include drivers and
795 infrastructure code to support RapidIO interconnect devices.
798 bool "Freescale Embedded SRIO Controller support"
799 depends on RAPIDIO && HAS_RAPIDIO
802 Include support for RapidIO controller on Freescale embedded
803 processors (MPC8548, MPC8641, etc).
805 source "drivers/rapidio/Kconfig"
809 config NONSTATIC_KERNEL
813 menu "Advanced setup"
816 config ADVANCED_OPTIONS
817 bool "Prompt for advanced kernel configuration options"
819 This option will enable prompting for a variety of advanced kernel
820 configuration options. These options can cause the kernel to not
821 work if they are set incorrectly, but can be used to optimize certain
822 aspects of kernel memory management.
824 Unless you know what you are doing, say N here.
826 comment "Default settings for advanced configuration options are used"
827 depends on !ADVANCED_OPTIONS
829 config LOWMEM_SIZE_BOOL
830 bool "Set maximum low memory"
831 depends on ADVANCED_OPTIONS
833 This option allows you to set the maximum amount of memory which
834 will be used as "low memory", that is, memory which the kernel can
835 access directly, without having to set up a kernel virtual mapping.
836 This can be useful in optimizing the layout of kernel virtual
839 Say N here unless you know what you are doing.
842 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
845 config LOWMEM_CAM_NUM_BOOL
846 bool "Set number of CAMs to use to map low memory"
847 depends on ADVANCED_OPTIONS && FSL_BOOKE
849 This option allows you to set the maximum number of CAM slots that
850 will be used to map low memory. There are a limited number of slots
851 available and even more limited number that will fit in the L1 MMU.
852 However, using more entries will allow mapping more low memory. This
853 can be useful in optimizing the layout of kernel virtual memory.
855 Say N here unless you know what you are doing.
857 config LOWMEM_CAM_NUM
859 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
862 config DYNAMIC_MEMSTART
863 bool "Enable page aligned dynamic load address for kernel"
864 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
865 select NONSTATIC_KERNEL
867 This option enables the kernel to be loaded at any page aligned
868 physical address. The kernel creates a mapping from KERNELBASE to
869 the address where the kernel is loaded. The page size here implies
870 the TLB page size of the mapping for kernel on the particular platform.
871 Please refer to the init code for finding the TLB page size.
873 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
874 kernel image, where the only restriction is the page aligned kernel
875 load address. When this option is enabled, the compile time physical
876 address CONFIG_PHYSICAL_START is ignored.
878 This option is overridden by CONFIG_RELOCATABLE
881 bool "Build a relocatable kernel"
882 depends on ADVANCED_OPTIONS && FLATMEM && 44x
883 select NONSTATIC_KERNEL
885 This builds a kernel image that is capable of running at the
886 location the kernel is loaded at, without any alignment restrictions.
887 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
889 One use is for the kexec on panic case where the recovery kernel
890 must live at a different physical address than the primary
893 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
894 it has been loaded at and the compile time physical addresses
895 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
896 setting can still be useful to bootwrappers that need to know the
897 load address of the kernel (eg. u-boot/mkimage).
899 config RELOCATABLE_PPC32
901 depends on PPC32 && RELOCATABLE
903 config PAGE_OFFSET_BOOL
904 bool "Set custom page offset address"
905 depends on ADVANCED_OPTIONS
907 This option allows you to set the kernel virtual address at which
908 the kernel will map low memory. This can be useful in optimizing
909 the virtual memory layout of the system.
911 Say N here unless you know what you are doing.
914 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
917 config KERNEL_START_BOOL
918 bool "Set custom kernel base address"
919 depends on ADVANCED_OPTIONS
921 This option allows you to set the kernel virtual address at which
922 the kernel will be loaded. Normally this should match PAGE_OFFSET
923 however there are times (like kdump) that one might not want them
926 Say N here unless you know what you are doing.
929 hex "Virtual address of kernel base" if KERNEL_START_BOOL
930 default PAGE_OFFSET if PAGE_OFFSET_BOOL
931 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
934 config PHYSICAL_START_BOOL
935 bool "Set physical address where the kernel is loaded"
936 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
938 This gives the physical address where the kernel is loaded.
940 Say N here unless you know what you are doing.
942 config PHYSICAL_START
943 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
944 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
947 config PHYSICAL_ALIGN
949 default "0x04000000" if FSL_BOOKE
951 This value puts the alignment restrictions on physical address
952 where kernel is loaded and run from. Kernel is compiled for an
953 address which meets above alignment restriction.
955 config TASK_SIZE_BOOL
956 bool "Set custom user task size"
957 depends on ADVANCED_OPTIONS
959 This option allows you to set the amount of virtual address space
960 allocated to user tasks. This can be useful in optimizing the
961 virtual memory layout of the system.
963 Say N here unless you know what you are doing.
966 hex "Size of user task space" if TASK_SIZE_BOOL
967 default "0x80000000" if PPC_PREP || PPC_8xx
970 config CONSISTENT_SIZE_BOOL
971 bool "Set custom consistent memory pool size"
972 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
974 This option allows you to set the size of the
975 consistent memory pool. This pool of virtual memory
976 is used to make consistent memory allocations.
978 config CONSISTENT_SIZE
979 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
980 default "0x00200000" if NOT_COHERENT_CACHE
983 bool "Pinned Kernel TLBs (860 ONLY)"
984 depends on ADVANCED_OPTIONS && 8xx
989 bool "Build a relocatable kernel"
990 select NONSTATIC_KERNEL
992 This builds a kernel image that is capable of running anywhere
993 in the RMA (real memory area) at any 16k-aligned base address.
994 The kernel is linked as a position-independent executable (PIE)
995 and contains dynamic relocations which are processed early
996 in the bootup process.
998 One use is for the kexec on panic case where the recovery kernel
999 must live at a different physical address than the primary
1004 default "0xc000000000000000"
1007 default "0xc000000000000000"
1008 config PHYSICAL_START
1010 default "0x00000000"
1013 source "net/Kconfig"
1015 source "drivers/Kconfig"
1019 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1021 source "lib/Kconfig"
1023 source "arch/powerpc/Kconfig.debug"
1025 source "security/Kconfig"
1029 depends on COMPAT && KEYS
1032 source "crypto/Kconfig"
1039 config PPC_LIB_RHEAP
1042 source "arch/powerpc/kvm/Kconfig"