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
350 Support user-mode Transactional Memory on POWERPC.
356 bool "SWIOTLB support"
360 Support for IO bounce buffering for systems without an IOMMU.
361 This allows us to DMA to the full physical address space on
362 platforms where the size of a physical address is larger
363 than the bus address. Not all platforms support this.
366 bool "Support for enabling/disabling CPUs"
367 depends on SMP && (PPC_PSERIES || \
368 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
370 Say Y here to be able to disable and re-enable individual
371 CPUs at runtime on SMP machines.
373 Say N if you are unsure.
375 config ARCH_CPU_PROBE_RELEASE
377 depends on HOTPLUG_CPU
379 config ARCH_ENABLE_MEMORY_HOTPLUG
382 config ARCH_HAS_WALK_MEMORY
385 config ARCH_ENABLE_MEMORY_HOTREMOVE
389 bool "kexec system call"
390 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
392 kexec is a system call that implements the ability to shutdown your
393 current kernel, and to start another kernel. It is like a reboot
394 but it is independent of the system firmware. And like a reboot
395 you can start any kernel with it, not just Linux.
397 The name comes from the similarity to the exec system call.
399 It is an ongoing process to be certain the hardware in a machine
400 is properly shutdown, so do not be surprised if this code does not
401 initially work for you. As of this writing the exact hardware
402 interface is strongly in flux, so no good recommendation can be
406 bool "Build a kdump crash kernel"
407 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
408 select RELOCATABLE if PPC64 || 44x
409 select DYNAMIC_MEMSTART if FSL_BOOKE
411 Build a kernel suitable for use as a kdump capture kernel.
412 The same kernel binary can be used as production kernel and dump
416 bool "Firmware-assisted dump"
417 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
419 A robust mechanism to get reliable kernel crash dump with
420 assistance from firmware. This approach does not use kexec,
421 instead firmware assists in booting the kdump kernel
422 while preserving memory contents. Firmware-assisted dump
423 is meant to be a kdump replacement offering robustness and
424 speed not possible without system firmware assistance.
429 bool "Distribute interrupts on all CPUs by default"
432 This option gives the kernel permission to distribute IRQs across
433 multiple CPUs. Saying N here will route all IRQs to the first
434 CPU. Generally saying Y is safe, although some problems have been
435 reported with SMP Power Macintoshes with this option enabled.
440 default y if SMP && PPC_PSERIES
446 depends on NEED_MULTIPLE_NODES
448 config ARCH_SELECT_MEMORY_MODEL
452 config ARCH_FLATMEM_ENABLE
454 depends on (PPC64 && !NUMA) || PPC32
456 config ARCH_SPARSEMEM_ENABLE
459 select SPARSEMEM_VMEMMAP_ENABLE
461 config ARCH_SPARSEMEM_DEFAULT
463 depends on (SMP && PPC_PSERIES) || PPC_PS3
465 config SYS_SUPPORTS_HUGETLBFS
470 config ARCH_MEMORY_PROBE
472 depends on MEMORY_HOTPLUG
474 # Some NUMA nodes have memory ranges that span
475 # other nodes. Even though a pfn is valid and
476 # between a node's start and end pfns, it may not
477 # reside on that node. See memmap_init_zone()
479 config NODES_SPAN_OTHER_NODES
481 depends on NEED_MULTIPLE_NODES
483 config PPC_HAS_HASH_64K
489 bool "Using standard binutils settings"
493 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
494 Note, that kernel will be able to run only those applications,
495 which had been compiled using binutils later than 2.17.50.0.3 with
496 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
497 the older binutils, you can patch them with a trivial patch, which
498 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
504 Select the kernel logical page size. Increasing the page size
505 will reduce software overhead at each page boundary, allow
506 hardware prefetch mechanisms to be more effective, and allow
507 larger dma transfers increasing IO efficiency and reducing
508 overhead. However the utilization of memory will increase.
509 For example, each cached file will using a multiple of the
510 page size to hold its contents and the difference between the
511 end of file and the end of page is wasted.
513 Some dedicated systems, such as software raid serving with
514 accelerated calculations, have shown significant increases.
516 If you configure a 64 bit kernel for 64k pages but the
517 processor does not support them, then the kernel will simulate
518 them with 4k pages, loading them on demand, but with the
519 reduced software overhead and larger internal fragmentation.
520 For the 32 bit kernel, a large page option will not be offered
521 unless it is supported by the configured processor.
523 If unsure, choose 4K_PAGES.
529 bool "16k page size" if 44x
532 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
533 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
535 config PPC_256K_PAGES
536 bool "256k page size" if 44x
537 depends on !STDBINUTILS
539 Make the page size 256k.
541 As the ELF standard only requires alignment to support page
542 sizes up to 64k, you will need to compile all of your user
543 space applications with a non-standard binutils settings
544 (see the STDBINUTILS description for details).
546 Say N unless you know what you are doing.
550 config FORCE_MAX_ZONEORDER
551 int "Maximum zone order"
552 range 9 64 if PPC64 && PPC_64K_PAGES
553 default "9" if PPC64 && PPC_64K_PAGES
554 range 13 64 if PPC64 && !PPC_64K_PAGES
555 default "13" if PPC64 && !PPC_64K_PAGES
556 range 9 64 if PPC32 && PPC_16K_PAGES
557 default "9" if PPC32 && PPC_16K_PAGES
558 range 7 64 if PPC32 && PPC_64K_PAGES
559 default "7" if PPC32 && PPC_64K_PAGES
560 range 5 64 if PPC32 && PPC_256K_PAGES
561 default "5" if PPC32 && PPC_256K_PAGES
565 The kernel memory allocator divides physically contiguous memory
566 blocks into "zones", where each zone is a power of two number of
567 pages. This option selects the largest power of two that the kernel
568 keeps in the memory allocator. If you need to allocate very large
569 blocks of physically contiguous memory, then you may need to
572 This config option is actually maximum order plus one. For example,
573 a value of 11 means that the largest free memory block is 2^10 pages.
575 The page size is not necessarily 4KB. For example, on 64-bit
576 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
577 this in mind when choosing a value for this option.
579 config PPC_SUBPAGE_PROT
580 bool "Support setting protections for 4k subpages"
581 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
583 This option adds support for a system call to allow user programs
584 to set access permissions (read/write, readonly, or no access)
585 on the 4k subpages of each 64k page.
588 bool "SMT (Hyperthreading) scheduler support"
589 depends on PPC64 && SMP
591 SMT scheduler support improves the CPU scheduler's decision making
592 when dealing with POWER5 cpus at a cost of slightly increased
593 overhead in some places. If unsure say N here.
595 config PPC_DENORMALISATION
596 bool "PowerPC denormalisation exception handling"
597 depends on PPC_BOOK3S_64
598 default "y" if PPC_POWERNV
600 Add support for handling denormalisation of single precision
601 values. Useful for bare metal only. If unsure say Y here.
604 bool "Default bootloader kernel arguments"
607 string "Initial kernel command string"
608 depends on CMDLINE_BOOL
609 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
611 On some platforms, there is currently no way for the boot loader to
612 pass arguments to the kernel. For these platforms, you can supply
613 some command-line options at build time by entering them here. In
614 most cases you will need to specify the root device here.
617 string "Additional default image types"
619 List additional targets to be built by the bootwrapper here (separated
620 by spaces). This is useful for targets that depend of device tree
621 files in the .dts directory.
623 Targets in this list will be build as part of the default build
624 target, or when the user does a 'make zImage' or a
625 'make zImage.initrd'.
627 If unsure, leave blank
629 config ARCH_WANTS_FREEZER_CONTROL
633 source kernel/power/Kconfig
636 bool "Enable seccomp to safely compute untrusted bytecode"
640 This kernel feature is useful for number crunching applications
641 that may need to compute untrusted bytecode during their
642 execution. By using pipes or other transports made available to
643 the process as file descriptors supporting the read/write
644 syscalls, it's possible to isolate those applications in
645 their own address space using seccomp. Once seccomp is
646 enabled via /proc/<pid>/seccomp, it cannot be disabled
647 and the task is only allowed to execute a few safe syscalls
648 defined by each seccomp mode.
650 If unsure, say Y. Only embedded should say N here.
661 bool "Support for ISA-bus hardware"
665 Find out whether you have ISA slots on your motherboard. ISA is the
666 name of a bus system, i.e. the way the CPU talks to the other stuff
667 inside your box. If you have an Apple machine, say N here; if you
668 have an IBM RS/6000 or pSeries machine, say Y. If you have an
669 embedded board, consult your board documentation.
675 config NEED_DMA_MAP_STATE
676 def_bool (PPC64 || NOT_COHERENT_CACHE)
678 config NEED_SG_DMA_LENGTH
681 config GENERIC_ISA_DMA
683 depends on ISA_DMA_API
686 config PPC_INDIRECT_PCI
689 default y if 40x || 44x
703 select PPC_INDIRECT_PCI
709 depends on SUSPEND && (PPC_85xx || PPC_86xx)
711 Freescale MPC85xx/MPC86xx power management controller support
712 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
717 depends on SUSPEND && (44x || 40x)
719 PPC4xx Clock Power Management (CPM) support (suspend/resume).
720 It also enables support for two different idle states (idle-wait
727 bool "Freescale Local Bus support"
730 Enables reporting of errors from the Freescale local bus
731 controller. Also contains some common code used by
732 drivers for specific local bus peripherals.
740 depends on PPC_83xx || QUICC_ENGINE || CPM2
742 Freescale General-purpose Timers support
744 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
748 # Platforms that what PCI turned unconditionally just do select PCI
749 # in their config node. Platforms that want to choose at config
750 # time should select PPC_PCI_CHOICE
751 config PPC_PCI_CHOICE
755 bool "PCI support" if PPC_PCI_CHOICE
756 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
757 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
758 default PCI_QSPAN if !4xx && !CPM2 && 8xx
759 select GENERIC_PCI_IOMAP
761 Find out whether your system includes a PCI bus. PCI is the name of
762 a bus system, i.e. the way the CPU talks to the other stuff inside
763 your box. If you say Y here, the kernel will include drivers and
764 infrastructure code to support PCI bus devices.
774 depends on !4xx && !CPM2 && 8xx
777 Say Y here if you have a system based on a Motorola 8xx-series
778 embedded processor with a QSPAN PCI interface, otherwise say N.
782 depends on PCI && 8260
783 select PPC_INDIRECT_PCI
786 source "drivers/pci/pcie/Kconfig"
788 source "drivers/pci/Kconfig"
790 source "drivers/pcmcia/Kconfig"
792 source "drivers/pci/hotplug/Kconfig"
799 bool "RapidIO support"
800 depends on HAS_RAPIDIO || PCI
802 If you say Y here, the kernel will include drivers and
803 infrastructure code to support RapidIO interconnect devices.
806 bool "Freescale Embedded SRIO Controller support"
807 depends on RAPIDIO && HAS_RAPIDIO
810 Include support for RapidIO controller on Freescale embedded
811 processors (MPC8548, MPC8641, etc).
813 source "drivers/rapidio/Kconfig"
817 config NONSTATIC_KERNEL
821 menu "Advanced setup"
824 config ADVANCED_OPTIONS
825 bool "Prompt for advanced kernel configuration options"
827 This option will enable prompting for a variety of advanced kernel
828 configuration options. These options can cause the kernel to not
829 work if they are set incorrectly, but can be used to optimize certain
830 aspects of kernel memory management.
832 Unless you know what you are doing, say N here.
834 comment "Default settings for advanced configuration options are used"
835 depends on !ADVANCED_OPTIONS
837 config LOWMEM_SIZE_BOOL
838 bool "Set maximum low memory"
839 depends on ADVANCED_OPTIONS
841 This option allows you to set the maximum amount of memory which
842 will be used as "low memory", that is, memory which the kernel can
843 access directly, without having to set up a kernel virtual mapping.
844 This can be useful in optimizing the layout of kernel virtual
847 Say N here unless you know what you are doing.
850 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
853 config LOWMEM_CAM_NUM_BOOL
854 bool "Set number of CAMs to use to map low memory"
855 depends on ADVANCED_OPTIONS && FSL_BOOKE
857 This option allows you to set the maximum number of CAM slots that
858 will be used to map low memory. There are a limited number of slots
859 available and even more limited number that will fit in the L1 MMU.
860 However, using more entries will allow mapping more low memory. This
861 can be useful in optimizing the layout of kernel virtual memory.
863 Say N here unless you know what you are doing.
865 config LOWMEM_CAM_NUM
867 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
870 config DYNAMIC_MEMSTART
871 bool "Enable page aligned dynamic load address for kernel"
872 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
873 select NONSTATIC_KERNEL
875 This option enables the kernel to be loaded at any page aligned
876 physical address. The kernel creates a mapping from KERNELBASE to
877 the address where the kernel is loaded. The page size here implies
878 the TLB page size of the mapping for kernel on the particular platform.
879 Please refer to the init code for finding the TLB page size.
881 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
882 kernel image, where the only restriction is the page aligned kernel
883 load address. When this option is enabled, the compile time physical
884 address CONFIG_PHYSICAL_START is ignored.
886 This option is overridden by CONFIG_RELOCATABLE
889 bool "Build a relocatable kernel"
890 depends on ADVANCED_OPTIONS && FLATMEM && 44x
891 select NONSTATIC_KERNEL
893 This builds a kernel image that is capable of running at the
894 location the kernel is loaded at, without any alignment restrictions.
895 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
897 One use is for the kexec on panic case where the recovery kernel
898 must live at a different physical address than the primary
901 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
902 it has been loaded at and the compile time physical addresses
903 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
904 setting can still be useful to bootwrappers that need to know the
905 load address of the kernel (eg. u-boot/mkimage).
907 config RELOCATABLE_PPC32
909 depends on PPC32 && RELOCATABLE
911 config PAGE_OFFSET_BOOL
912 bool "Set custom page offset address"
913 depends on ADVANCED_OPTIONS
915 This option allows you to set the kernel virtual address at which
916 the kernel will map low memory. This can be useful in optimizing
917 the virtual memory layout of the system.
919 Say N here unless you know what you are doing.
922 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
925 config KERNEL_START_BOOL
926 bool "Set custom kernel base address"
927 depends on ADVANCED_OPTIONS
929 This option allows you to set the kernel virtual address at which
930 the kernel will be loaded. Normally this should match PAGE_OFFSET
931 however there are times (like kdump) that one might not want them
934 Say N here unless you know what you are doing.
937 hex "Virtual address of kernel base" if KERNEL_START_BOOL
938 default PAGE_OFFSET if PAGE_OFFSET_BOOL
939 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
942 config PHYSICAL_START_BOOL
943 bool "Set physical address where the kernel is loaded"
944 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
946 This gives the physical address where the kernel is loaded.
948 Say N here unless you know what you are doing.
950 config PHYSICAL_START
951 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
952 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
955 config PHYSICAL_ALIGN
957 default "0x04000000" if FSL_BOOKE
959 This value puts the alignment restrictions on physical address
960 where kernel is loaded and run from. Kernel is compiled for an
961 address which meets above alignment restriction.
963 config TASK_SIZE_BOOL
964 bool "Set custom user task size"
965 depends on ADVANCED_OPTIONS
967 This option allows you to set the amount of virtual address space
968 allocated to user tasks. This can be useful in optimizing the
969 virtual memory layout of the system.
971 Say N here unless you know what you are doing.
974 hex "Size of user task space" if TASK_SIZE_BOOL
975 default "0x80000000" if PPC_8xx
978 config CONSISTENT_SIZE_BOOL
979 bool "Set custom consistent memory pool size"
980 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
982 This option allows you to set the size of the
983 consistent memory pool. This pool of virtual memory
984 is used to make consistent memory allocations.
986 config CONSISTENT_SIZE
987 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
988 default "0x00200000" if NOT_COHERENT_CACHE
991 bool "Pinned Kernel TLBs (860 ONLY)"
992 depends on ADVANCED_OPTIONS && 8xx
997 bool "Build a relocatable kernel"
998 select NONSTATIC_KERNEL
1000 This builds a kernel image that is capable of running anywhere
1001 in the RMA (real memory area) at any 16k-aligned base address.
1002 The kernel is linked as a position-independent executable (PIE)
1003 and contains dynamic relocations which are processed early
1004 in the bootup process.
1006 One use is for the kexec on panic case where the recovery kernel
1007 must live at a different physical address than the primary
1010 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1013 default "0xc000000000000000"
1016 default "0xc000000000000000"
1017 config PHYSICAL_START
1019 default "0x00000000"
1025 source "net/Kconfig"
1027 source "drivers/Kconfig"
1031 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1033 source "lib/Kconfig"
1035 source "arch/powerpc/Kconfig.debug"
1037 source "security/Kconfig"
1041 depends on COMPAT && KEYS
1044 source "crypto/Kconfig"
1051 config PPC_LIB_RHEAP
1054 source "arch/powerpc/kvm/Kconfig"