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
157 select COMPAT_BINFMT_ELF
158 select ARCH_WANT_OLD_COMPAT_IPC
159 select COMPAT_OLD_SIGACTION
161 config SYSVIPC_COMPAT
163 depends on COMPAT && SYSVIPC
166 # All PPC32s use generic nvram driver through ppc_md
171 config SCHED_OMIT_FRAME_POINTER
175 config ARCH_MAY_HAVE_PC_FDC
177 default !PPC_PSERIES || PCI
182 config PPC_UDBG_16550
186 config GENERIC_TBSYNC
188 default y if PPC32 && SMP
200 config SYS_SUPPORTS_APM_EMULATION
201 default y if PMAC_APM_EMU
207 Used to allow a board to specify it wants an ePAPR compliant wrapper.
210 config DEFAULT_UIMAGE
213 Used to allow a board to specify it wants a uImage built by default
219 config ARCH_HIBERNATION_POSSIBLE
223 config ARCH_SUSPEND_POSSIBLE
225 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
226 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
229 config PPC_DCR_NATIVE
239 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
242 config PPC_OF_PLATFORM_PCI
245 depends on PPC64 # not supported on 32 bits yet
248 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
251 config ARCH_SUPPORTS_UPROBES
254 config PPC_ADV_DEBUG_REGS
256 depends on 40x || BOOKE
259 config PPC_ADV_DEBUG_IACS
261 depends on PPC_ADV_DEBUG_REGS
265 config PPC_ADV_DEBUG_DACS
267 depends on PPC_ADV_DEBUG_REGS
270 config PPC_ADV_DEBUG_DVCS
272 depends on PPC_ADV_DEBUG_REGS
276 config PPC_ADV_DEBUG_DAC_RANGE
278 depends on PPC_ADV_DEBUG_REGS && 44x
281 config PPC_EMULATE_SSTEP
283 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
285 source "init/Kconfig"
287 source "kernel/Kconfig.freezer"
289 source "arch/powerpc/sysdev/Kconfig"
290 source "arch/powerpc/platforms/Kconfig"
292 menu "Kernel options"
295 bool "High memory support"
298 source kernel/Kconfig.hz
299 source kernel/Kconfig.preempt
300 source "fs/Kconfig.binfmt"
302 config HUGETLB_PAGE_SIZE_VARIABLE
304 depends on HUGETLB_PAGE
307 config MATH_EMULATION
308 bool "Math emulation"
309 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
311 Some PowerPC chips designed for embedded applications do not have
312 a floating-point unit and therefore do not implement the
313 floating-point instructions in the PowerPC instruction set. If you
314 say Y here, the kernel will include code to emulate a floating-point
315 unit, which will allow programs that use floating-point
318 This is also useful to emulate missing (optional) instructions
319 such as fsqrt on cores that do have an FPU but do not implement
320 them (such as Freescale BookE).
323 prompt "Math emulation options"
324 default MATH_EMULATION_FULL
325 depends on MATH_EMULATION
327 config MATH_EMULATION_FULL
328 bool "Emulate all the floating point instructions"
330 Select this option will enable the kernel to support to emulate
331 all the floating point instructions. If your SoC doesn't have
332 a FPU, you should select this.
334 config MATH_EMULATION_HW_UNIMPLEMENTED
335 bool "Just emulate the FPU unimplemented instructions"
337 Select this if you know there does have a hardware FPU on your
338 SoC, but some floating point instructions are not implemented by that.
342 config PPC_TRANSACTIONAL_MEM
343 bool "Transactional Memory support for POWERPC"
344 depends on PPC_BOOK3S_64
348 Support user-mode Transactional Memory on POWERPC.
354 bool "SWIOTLB support"
358 Support for IO bounce buffering for systems without an IOMMU.
359 This allows us to DMA to the full physical address space on
360 platforms where the size of a physical address is larger
361 than the bus address. Not all platforms support this.
364 bool "Support for enabling/disabling CPUs"
365 depends on SMP && (PPC_PSERIES || \
366 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
368 Say Y here to be able to disable and re-enable individual
369 CPUs at runtime on SMP machines.
371 Say N if you are unsure.
373 config ARCH_CPU_PROBE_RELEASE
375 depends on HOTPLUG_CPU
377 config ARCH_ENABLE_MEMORY_HOTPLUG
380 config ARCH_HAS_WALK_MEMORY
383 config ARCH_ENABLE_MEMORY_HOTREMOVE
387 bool "kexec system call"
388 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
390 kexec is a system call that implements the ability to shutdown your
391 current kernel, and to start another kernel. It is like a reboot
392 but it is independent of the system firmware. And like a reboot
393 you can start any kernel with it, not just Linux.
395 The name comes from the similarity to the exec system call.
397 It is an ongoing process to be certain the hardware in a machine
398 is properly shutdown, so do not be surprised if this code does not
399 initially work for you. As of this writing the exact hardware
400 interface is strongly in flux, so no good recommendation can be
404 bool "Build a kdump crash kernel"
405 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
406 select RELOCATABLE if PPC64 || 44x
407 select DYNAMIC_MEMSTART if FSL_BOOKE
409 Build a kernel suitable for use as a kdump capture kernel.
410 The same kernel binary can be used as production kernel and dump
414 bool "Firmware-assisted dump"
415 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
417 A robust mechanism to get reliable kernel crash dump with
418 assistance from firmware. This approach does not use kexec,
419 instead firmware assists in booting the kdump kernel
420 while preserving memory contents. Firmware-assisted dump
421 is meant to be a kdump replacement offering robustness and
422 speed not possible without system firmware assistance.
427 bool "Distribute interrupts on all CPUs by default"
430 This option gives the kernel permission to distribute IRQs across
431 multiple CPUs. Saying N here will route all IRQs to the first
432 CPU. Generally saying Y is safe, although some problems have been
433 reported with SMP Power Macintoshes with this option enabled.
438 default y if SMP && PPC_PSERIES
444 depends on NEED_MULTIPLE_NODES
446 config ARCH_SELECT_MEMORY_MODEL
450 config ARCH_FLATMEM_ENABLE
452 depends on (PPC64 && !NUMA) || PPC32
454 config ARCH_SPARSEMEM_ENABLE
457 select SPARSEMEM_VMEMMAP_ENABLE
459 config ARCH_SPARSEMEM_DEFAULT
461 depends on (SMP && PPC_PSERIES) || PPC_PS3
463 config SYS_SUPPORTS_HUGETLBFS
468 config ARCH_MEMORY_PROBE
470 depends on MEMORY_HOTPLUG
472 # Some NUMA nodes have memory ranges that span
473 # other nodes. Even though a pfn is valid and
474 # between a node's start and end pfns, it may not
475 # reside on that node. See memmap_init_zone()
477 config NODES_SPAN_OTHER_NODES
479 depends on NEED_MULTIPLE_NODES
481 config PPC_HAS_HASH_64K
487 bool "Using standard binutils settings"
491 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
492 Note, that kernel will be able to run only those applications,
493 which had been compiled using binutils later than 2.17.50.0.3 with
494 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
495 the older binutils, you can patch them with a trivial patch, which
496 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
502 Select the kernel logical page size. Increasing the page size
503 will reduce software overhead at each page boundary, allow
504 hardware prefetch mechanisms to be more effective, and allow
505 larger dma transfers increasing IO efficiency and reducing
506 overhead. However the utilization of memory will increase.
507 For example, each cached file will using a multiple of the
508 page size to hold its contents and the difference between the
509 end of file and the end of page is wasted.
511 Some dedicated systems, such as software raid serving with
512 accelerated calculations, have shown significant increases.
514 If you configure a 64 bit kernel for 64k pages but the
515 processor does not support them, then the kernel will simulate
516 them with 4k pages, loading them on demand, but with the
517 reduced software overhead and larger internal fragmentation.
518 For the 32 bit kernel, a large page option will not be offered
519 unless it is supported by the configured processor.
521 If unsure, choose 4K_PAGES.
527 bool "16k page size" if 44x
530 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
531 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
533 config PPC_256K_PAGES
534 bool "256k page size" if 44x
535 depends on !STDBINUTILS
537 Make the page size 256k.
539 As the ELF standard only requires alignment to support page
540 sizes up to 64k, you will need to compile all of your user
541 space applications with a non-standard binutils settings
542 (see the STDBINUTILS description for details).
544 Say N unless you know what you are doing.
548 config FORCE_MAX_ZONEORDER
549 int "Maximum zone order"
550 range 9 64 if PPC64 && PPC_64K_PAGES
551 default "9" if PPC64 && PPC_64K_PAGES
552 range 13 64 if PPC64 && !PPC_64K_PAGES
553 default "13" if PPC64 && !PPC_64K_PAGES
554 range 9 64 if PPC32 && PPC_16K_PAGES
555 default "9" if PPC32 && PPC_16K_PAGES
556 range 7 64 if PPC32 && PPC_64K_PAGES
557 default "7" if PPC32 && PPC_64K_PAGES
558 range 5 64 if PPC32 && PPC_256K_PAGES
559 default "5" if PPC32 && PPC_256K_PAGES
563 The kernel memory allocator divides physically contiguous memory
564 blocks into "zones", where each zone is a power of two number of
565 pages. This option selects the largest power of two that the kernel
566 keeps in the memory allocator. If you need to allocate very large
567 blocks of physically contiguous memory, then you may need to
570 This config option is actually maximum order plus one. For example,
571 a value of 11 means that the largest free memory block is 2^10 pages.
573 The page size is not necessarily 4KB. For example, on 64-bit
574 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
575 this in mind when choosing a value for this option.
577 config PPC_SUBPAGE_PROT
578 bool "Support setting protections for 4k subpages"
579 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
581 This option adds support for a system call to allow user programs
582 to set access permissions (read/write, readonly, or no access)
583 on the 4k subpages of each 64k page.
586 bool "SMT (Hyperthreading) scheduler support"
587 depends on PPC64 && SMP
589 SMT scheduler support improves the CPU scheduler's decision making
590 when dealing with POWER5 cpus at a cost of slightly increased
591 overhead in some places. If unsure say N here.
593 config PPC_DENORMALISATION
594 bool "PowerPC denormalisation exception handling"
595 depends on PPC_BOOK3S_64
596 default "y" if PPC_POWERNV
598 Add support for handling denormalisation of single precision
599 values. Useful for bare metal only. If unsure say Y here.
602 bool "Default bootloader kernel arguments"
605 string "Initial kernel command string"
606 depends on CMDLINE_BOOL
607 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
609 On some platforms, there is currently no way for the boot loader to
610 pass arguments to the kernel. For these platforms, you can supply
611 some command-line options at build time by entering them here. In
612 most cases you will need to specify the root device here.
615 string "Additional default image types"
617 List additional targets to be built by the bootwrapper here (separated
618 by spaces). This is useful for targets that depend of device tree
619 files in the .dts directory.
621 Targets in this list will be build as part of the default build
622 target, or when the user does a 'make zImage' or a
623 'make zImage.initrd'.
625 If unsure, leave blank
627 config ARCH_WANTS_FREEZER_CONTROL
631 source kernel/power/Kconfig
634 bool "Enable seccomp to safely compute untrusted bytecode"
638 This kernel feature is useful for number crunching applications
639 that may need to compute untrusted bytecode during their
640 execution. By using pipes or other transports made available to
641 the process as file descriptors supporting the read/write
642 syscalls, it's possible to isolate those applications in
643 their own address space using seccomp. Once seccomp is
644 enabled via /proc/<pid>/seccomp, it cannot be disabled
645 and the task is only allowed to execute a few safe syscalls
646 defined by each seccomp mode.
648 If unsure, say Y. Only embedded should say N here.
659 bool "Support for ISA-bus hardware"
663 Find out whether you have ISA slots on your motherboard. ISA is the
664 name of a bus system, i.e. the way the CPU talks to the other stuff
665 inside your box. If you have an Apple machine, say N here; if you
666 have an IBM RS/6000 or pSeries machine, say Y. If you have an
667 embedded board, consult your board documentation.
673 config NEED_DMA_MAP_STATE
674 def_bool (PPC64 || NOT_COHERENT_CACHE)
676 config NEED_SG_DMA_LENGTH
679 config GENERIC_ISA_DMA
681 depends on ISA_DMA_API
684 config PPC_INDIRECT_PCI
687 default y if 40x || 44x
701 select PPC_INDIRECT_PCI
707 depends on SUSPEND && (PPC_85xx || PPC_86xx)
709 Freescale MPC85xx/MPC86xx power management controller support
710 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
715 depends on SUSPEND && (44x || 40x)
717 PPC4xx Clock Power Management (CPM) support (suspend/resume).
718 It also enables support for two different idle states (idle-wait
725 bool "Freescale Local Bus support"
728 Enables reporting of errors from the Freescale local bus
729 controller. Also contains some common code used by
730 drivers for specific local bus peripherals.
738 depends on PPC_83xx || QUICC_ENGINE || CPM2
740 Freescale General-purpose Timers support
742 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
746 # Platforms that what PCI turned unconditionally just do select PCI
747 # in their config node. Platforms that want to choose at config
748 # time should select PPC_PCI_CHOICE
749 config PPC_PCI_CHOICE
753 bool "PCI support" if PPC_PCI_CHOICE
754 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
755 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
756 default PCI_QSPAN if !4xx && !CPM2 && 8xx
757 select GENERIC_PCI_IOMAP
759 Find out whether your system includes a PCI bus. PCI is the name of
760 a bus system, i.e. the way the CPU talks to the other stuff inside
761 your box. If you say Y here, the kernel will include drivers and
762 infrastructure code to support PCI bus devices.
772 depends on !4xx && !CPM2 && 8xx
775 Say Y here if you have a system based on a Motorola 8xx-series
776 embedded processor with a QSPAN PCI interface, otherwise say N.
780 depends on PCI && 8260
781 select PPC_INDIRECT_PCI
784 source "drivers/pci/pcie/Kconfig"
786 source "drivers/pci/Kconfig"
788 source "drivers/pcmcia/Kconfig"
790 source "drivers/pci/hotplug/Kconfig"
797 bool "RapidIO support"
798 depends on HAS_RAPIDIO || PCI
800 If you say Y here, the kernel will include drivers and
801 infrastructure code to support RapidIO interconnect devices.
804 bool "Freescale Embedded SRIO Controller support"
805 depends on RAPIDIO && HAS_RAPIDIO
808 Include support for RapidIO controller on Freescale embedded
809 processors (MPC8548, MPC8641, etc).
811 source "drivers/rapidio/Kconfig"
815 config NONSTATIC_KERNEL
819 menu "Advanced setup"
822 config ADVANCED_OPTIONS
823 bool "Prompt for advanced kernel configuration options"
825 This option will enable prompting for a variety of advanced kernel
826 configuration options. These options can cause the kernel to not
827 work if they are set incorrectly, but can be used to optimize certain
828 aspects of kernel memory management.
830 Unless you know what you are doing, say N here.
832 comment "Default settings for advanced configuration options are used"
833 depends on !ADVANCED_OPTIONS
835 config LOWMEM_SIZE_BOOL
836 bool "Set maximum low memory"
837 depends on ADVANCED_OPTIONS
839 This option allows you to set the maximum amount of memory which
840 will be used as "low memory", that is, memory which the kernel can
841 access directly, without having to set up a kernel virtual mapping.
842 This can be useful in optimizing the layout of kernel virtual
845 Say N here unless you know what you are doing.
848 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
851 config LOWMEM_CAM_NUM_BOOL
852 bool "Set number of CAMs to use to map low memory"
853 depends on ADVANCED_OPTIONS && FSL_BOOKE
855 This option allows you to set the maximum number of CAM slots that
856 will be used to map low memory. There are a limited number of slots
857 available and even more limited number that will fit in the L1 MMU.
858 However, using more entries will allow mapping more low memory. This
859 can be useful in optimizing the layout of kernel virtual memory.
861 Say N here unless you know what you are doing.
863 config LOWMEM_CAM_NUM
865 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
868 config DYNAMIC_MEMSTART
869 bool "Enable page aligned dynamic load address for kernel"
870 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
871 select NONSTATIC_KERNEL
873 This option enables the kernel to be loaded at any page aligned
874 physical address. The kernel creates a mapping from KERNELBASE to
875 the address where the kernel is loaded. The page size here implies
876 the TLB page size of the mapping for kernel on the particular platform.
877 Please refer to the init code for finding the TLB page size.
879 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
880 kernel image, where the only restriction is the page aligned kernel
881 load address. When this option is enabled, the compile time physical
882 address CONFIG_PHYSICAL_START is ignored.
884 This option is overridden by CONFIG_RELOCATABLE
887 bool "Build a relocatable kernel"
888 depends on ADVANCED_OPTIONS && FLATMEM && 44x
889 select NONSTATIC_KERNEL
891 This builds a kernel image that is capable of running at the
892 location the kernel is loaded at, without any alignment restrictions.
893 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
895 One use is for the kexec on panic case where the recovery kernel
896 must live at a different physical address than the primary
899 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
900 it has been loaded at and the compile time physical addresses
901 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
902 setting can still be useful to bootwrappers that need to know the
903 load address of the kernel (eg. u-boot/mkimage).
905 config RELOCATABLE_PPC32
907 depends on PPC32 && RELOCATABLE
909 config PAGE_OFFSET_BOOL
910 bool "Set custom page offset address"
911 depends on ADVANCED_OPTIONS
913 This option allows you to set the kernel virtual address at which
914 the kernel will map low memory. This can be useful in optimizing
915 the virtual memory layout of the system.
917 Say N here unless you know what you are doing.
920 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
923 config KERNEL_START_BOOL
924 bool "Set custom kernel base address"
925 depends on ADVANCED_OPTIONS
927 This option allows you to set the kernel virtual address at which
928 the kernel will be loaded. Normally this should match PAGE_OFFSET
929 however there are times (like kdump) that one might not want them
932 Say N here unless you know what you are doing.
935 hex "Virtual address of kernel base" if KERNEL_START_BOOL
936 default PAGE_OFFSET if PAGE_OFFSET_BOOL
937 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
940 config PHYSICAL_START_BOOL
941 bool "Set physical address where the kernel is loaded"
942 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
944 This gives the physical address where the kernel is loaded.
946 Say N here unless you know what you are doing.
948 config PHYSICAL_START
949 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
950 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
953 config PHYSICAL_ALIGN
955 default "0x04000000" if FSL_BOOKE
957 This value puts the alignment restrictions on physical address
958 where kernel is loaded and run from. Kernel is compiled for an
959 address which meets above alignment restriction.
961 config TASK_SIZE_BOOL
962 bool "Set custom user task size"
963 depends on ADVANCED_OPTIONS
965 This option allows you to set the amount of virtual address space
966 allocated to user tasks. This can be useful in optimizing the
967 virtual memory layout of the system.
969 Say N here unless you know what you are doing.
972 hex "Size of user task space" if TASK_SIZE_BOOL
973 default "0x80000000" if PPC_8xx
976 config CONSISTENT_SIZE_BOOL
977 bool "Set custom consistent memory pool size"
978 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
980 This option allows you to set the size of the
981 consistent memory pool. This pool of virtual memory
982 is used to make consistent memory allocations.
984 config CONSISTENT_SIZE
985 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
986 default "0x00200000" if NOT_COHERENT_CACHE
989 bool "Pinned Kernel TLBs (860 ONLY)"
990 depends on ADVANCED_OPTIONS && 8xx
995 bool "Build a relocatable kernel"
996 select NONSTATIC_KERNEL
998 This builds a kernel image that is capable of running anywhere
999 in the RMA (real memory area) at any 16k-aligned base address.
1000 The kernel is linked as a position-independent executable (PIE)
1001 and contains dynamic relocations which are processed early
1002 in the bootup process.
1004 One use is for the kexec on panic case where the recovery kernel
1005 must live at a different physical address than the primary
1008 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1011 default "0xc000000000000000"
1014 default "0xc000000000000000"
1015 config PHYSICAL_START
1017 default "0x00000000"
1023 source "net/Kconfig"
1025 source "drivers/Kconfig"
1029 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1031 source "lib/Kconfig"
1033 source "arch/powerpc/Kconfig.debug"
1035 source "security/Kconfig"
1039 depends on COMPAT && KEYS
1042 source "crypto/Kconfig"
1049 config PPC_LIB_RHEAP
1052 source "arch/powerpc/kvm/Kconfig"