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 TRACE_IRQFLAGS_SUPPORT
54 config LOCKDEP_SUPPORT
58 config RWSEM_GENERIC_SPINLOCK
61 config RWSEM_XCHGADD_ALGORITHM
65 config GENERIC_LOCKBREAK
68 depends on SMP && PREEMPT
70 config ARCH_HAS_ILOG2_U32
74 config ARCH_HAS_ILOG2_U64
78 config GENERIC_HWEIGHT
82 config ARCH_HAS_DMA_SET_COHERENT_MASK
88 select ARCH_MIGHT_HAVE_PC_PARPORT
89 select ARCH_MIGHT_HAVE_PC_SERIO
91 select ARCH_HAS_ELF_RANDOMIZE
93 select OF_EARLY_FLATTREE
94 select OF_RESERVED_MEM
95 select HAVE_FTRACE_MCOUNT_RECORD
96 select HAVE_DYNAMIC_FTRACE
97 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
98 select HAVE_FUNCTION_TRACER
99 select HAVE_FUNCTION_GRAPH_TRACER
100 select SYSCTL_EXCEPTION_TRACE
101 select ARCH_WANT_OPTIONAL_GPIOLIB
102 select VIRT_TO_BUS if !PPC64
104 select HAVE_IOREMAP_PROT
105 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
107 select HAVE_ARCH_KGDB
108 select HAVE_KRETPROBES
109 select HAVE_ARCH_TRACEHOOK
111 select HAVE_MEMBLOCK_NODE_MAP
112 select HAVE_DMA_API_DEBUG
114 select HAVE_DEBUG_KMEMLEAK
115 select ARCH_HAS_SG_CHAIN
116 select GENERIC_ATOMIC64 if PPC32
117 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
118 select HAVE_PERF_EVENTS
119 select HAVE_REGS_AND_STACK_ACCESS_API
120 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
121 select ARCH_WANT_IPC_PARSE_VERSION
124 select GENERIC_IRQ_SHOW
125 select GENERIC_IRQ_SHOW_LEVEL
126 select IRQ_FORCED_THREADING
127 select HAVE_RCU_TABLE_FREE if SMP
128 select HAVE_SYSCALL_TRACEPOINTS
130 select HAVE_ARCH_JUMP_LABEL
131 select ARCH_HAVE_NMI_SAFE_CMPXCHG
132 select ARCH_HAS_GCOV_PROFILE_ALL
133 select GENERIC_SMP_IDLE_THREAD
134 select GENERIC_CMOS_UPDATE
135 select GENERIC_TIME_VSYSCALL_OLD
136 select GENERIC_CLOCKEVENTS
137 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
138 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
139 select GENERIC_STRNCPY_FROM_USER
140 select GENERIC_STRNLEN_USER
141 select HAVE_MOD_ARCH_SPECIFIC
142 select MODULES_USE_ELF_RELA
143 select CLONE_BACKWARDS
144 select ARCH_USE_BUILTIN_BSWAP
145 select OLD_SIGSUSPEND
146 select OLD_SIGACTION if PPC32
147 select HAVE_DEBUG_STACKOVERFLOW
148 select HAVE_IRQ_EXIT_ON_IRQ_STACK
149 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
150 select HAVE_ARCH_AUDITSYSCALL
151 select ARCH_SUPPORTS_ATOMIC_RMW
152 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
154 select HAVE_GENERIC_RCU_GUP
155 select HAVE_PERF_EVENTS_NMI if PPC64
157 select EDAC_ATOMIC_SCRUB
158 select ARCH_HAS_DMA_SET_COHERENT_MASK
159 select ARCH_HAS_DEVMEM_IS_ALLOWED
160 select HAVE_ARCH_SECCOMP_FILTER
161 select ARCH_HAS_UBSAN_SANITIZE_ALL
164 def_bool CPU_LITTLE_ENDIAN
177 select COMPAT_BINFMT_ELF
178 select ARCH_WANT_OLD_COMPAT_IPC
179 select COMPAT_OLD_SIGACTION
181 config SYSVIPC_COMPAT
183 depends on COMPAT && SYSVIPC
186 # All PPC32s use generic nvram driver through ppc_md
191 config SCHED_OMIT_FRAME_POINTER
195 config ARCH_MAY_HAVE_PC_FDC
199 config PPC_UDBG_16550
203 config GENERIC_TBSYNC
205 default y if PPC32 && SMP
217 config SYS_SUPPORTS_APM_EMULATION
218 default y if PMAC_APM_EMU
224 Used to allow a board to specify it wants an ePAPR compliant wrapper.
227 config DEFAULT_UIMAGE
230 Used to allow a board to specify it wants a uImage built by default
233 config ARCH_HIBERNATION_POSSIBLE
237 config ARCH_SUSPEND_POSSIBLE
239 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
240 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
243 config PPC_DCR_NATIVE
253 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
256 config PPC_OF_PLATFORM_PCI
259 depends on PPC64 # not supported on 32 bits yet
262 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
263 depends on PPC32 || PPC_STD_MMU_64
266 config ARCH_SUPPORTS_UPROBES
269 config PPC_ADV_DEBUG_REGS
271 depends on 40x || BOOKE
274 config PPC_ADV_DEBUG_IACS
276 depends on PPC_ADV_DEBUG_REGS
280 config PPC_ADV_DEBUG_DACS
282 depends on PPC_ADV_DEBUG_REGS
285 config PPC_ADV_DEBUG_DVCS
287 depends on PPC_ADV_DEBUG_REGS
291 config PPC_ADV_DEBUG_DAC_RANGE
293 depends on PPC_ADV_DEBUG_REGS && 44x
296 config PPC_EMULATE_SSTEP
298 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
304 config PGTABLE_LEVELS
307 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
310 source "init/Kconfig"
312 source "kernel/Kconfig.freezer"
314 source "arch/powerpc/sysdev/Kconfig"
315 source "arch/powerpc/platforms/Kconfig"
317 menu "Kernel options"
320 bool "High memory support"
323 source kernel/Kconfig.hz
324 source kernel/Kconfig.preempt
325 source "fs/Kconfig.binfmt"
327 config HUGETLB_PAGE_SIZE_VARIABLE
329 depends on HUGETLB_PAGE
332 config MATH_EMULATION
333 bool "Math emulation"
334 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
336 Some PowerPC chips designed for embedded applications do not have
337 a floating-point unit and therefore do not implement the
338 floating-point instructions in the PowerPC instruction set. If you
339 say Y here, the kernel will include code to emulate a floating-point
340 unit, which will allow programs that use floating-point
343 This is also useful to emulate missing (optional) instructions
344 such as fsqrt on cores that do have an FPU but do not implement
345 them (such as Freescale BookE).
348 prompt "Math emulation options"
349 default MATH_EMULATION_FULL
350 depends on MATH_EMULATION
352 config MATH_EMULATION_FULL
353 bool "Emulate all the floating point instructions"
355 Select this option will enable the kernel to support to emulate
356 all the floating point instructions. If your SoC doesn't have
357 a FPU, you should select this.
359 config MATH_EMULATION_HW_UNIMPLEMENTED
360 bool "Just emulate the FPU unimplemented instructions"
362 Select this if you know there does have a hardware FPU on your
363 SoC, but some floating point instructions are not implemented by that.
367 config PPC_TRANSACTIONAL_MEM
368 bool "Transactional Memory support for POWERPC"
369 depends on PPC_BOOK3S_64
375 Support user-mode Transactional Memory on POWERPC.
377 config DISABLE_MPROFILE_KERNEL
378 bool "Disable use of mprofile-kernel for kernel tracing"
379 depends on PPC64 && CPU_LITTLE_ENDIAN
382 Selecting this options disables use of the mprofile-kernel ABI for
383 kernel tracing. That will cause options such as live patching
384 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
387 If you have a toolchain which supports mprofile-kernel, then you can
388 enable this. Otherwise leave it disabled. If you're not sure, say
391 config MPROFILE_KERNEL
392 depends on PPC64 && CPU_LITTLE_ENDIAN
393 def_bool !DISABLE_MPROFILE_KERNEL
399 bool "SWIOTLB support"
403 Support for IO bounce buffering for systems without an IOMMU.
404 This allows us to DMA to the full physical address space on
405 platforms where the size of a physical address is larger
406 than the bus address. Not all platforms support this.
409 bool "Support for enabling/disabling CPUs"
410 depends on SMP && (PPC_PSERIES || \
411 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
413 Say Y here to be able to disable and re-enable individual
414 CPUs at runtime on SMP machines.
416 Say N if you are unsure.
418 config ARCH_CPU_PROBE_RELEASE
420 depends on HOTPLUG_CPU
422 config ARCH_ENABLE_MEMORY_HOTPLUG
425 config ARCH_HAS_WALK_MEMORY
428 config ARCH_ENABLE_MEMORY_HOTREMOVE
431 config PPC64_SUPPORTS_MEMORY_FAILURE
432 bool "Add support for memory hwpoison"
433 depends on PPC_BOOK3S_64
434 default "y" if PPC_POWERNV
435 select ARCH_SUPPORTS_MEMORY_FAILURE
438 bool "kexec system call"
439 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
442 kexec is a system call that implements the ability to shutdown your
443 current kernel, and to start another kernel. It is like a reboot
444 but it is independent of the system firmware. And like a reboot
445 you can start any kernel with it, not just Linux.
447 The name comes from the similarity to the exec system call.
449 It is an ongoing process to be certain the hardware in a machine
450 is properly shutdown, so do not be surprised if this code does not
451 initially work for you. As of this writing the exact hardware
452 interface is strongly in flux, so no good recommendation can be
456 bool "Build a kdump crash kernel"
457 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
458 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
460 Build a kernel suitable for use as a kdump capture kernel.
461 The same kernel binary can be used as production kernel and dump
465 bool "Firmware-assisted dump"
466 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
468 A robust mechanism to get reliable kernel crash dump with
469 assistance from firmware. This approach does not use kexec,
470 instead firmware assists in booting the kdump kernel
471 while preserving memory contents. Firmware-assisted dump
472 is meant to be a kdump replacement offering robustness and
473 speed not possible without system firmware assistance.
478 bool "Distribute interrupts on all CPUs by default"
481 This option gives the kernel permission to distribute IRQs across
482 multiple CPUs. Saying N here will route all IRQs to the first
483 CPU. Generally saying Y is safe, although some problems have been
484 reported with SMP Power Macintoshes with this option enabled.
489 default y if SMP && PPC_PSERIES
495 depends on NEED_MULTIPLE_NODES
497 config USE_PERCPU_NUMA_NODE_ID
501 config HAVE_MEMORYLESS_NODES
505 config ARCH_SELECT_MEMORY_MODEL
509 config ARCH_FLATMEM_ENABLE
511 depends on (PPC64 && !NUMA) || PPC32
513 config ARCH_SPARSEMEM_ENABLE
516 select SPARSEMEM_VMEMMAP_ENABLE
518 config ARCH_SPARSEMEM_DEFAULT
520 depends on (SMP && PPC_PSERIES) || PPC_PS3
522 config SYS_SUPPORTS_HUGETLBFS
527 config ARCH_MEMORY_PROBE
529 depends on MEMORY_HOTPLUG
531 # Some NUMA nodes have memory ranges that span
532 # other nodes. Even though a pfn is valid and
533 # between a node's start and end pfns, it may not
534 # reside on that node. See memmap_init_zone()
536 config NODES_SPAN_OTHER_NODES
538 depends on NEED_MULTIPLE_NODES
541 bool "Using standard binutils settings"
545 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
546 Note, that kernel will be able to run only those applications,
547 which had been compiled using binutils later than 2.17.50.0.3 with
548 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
549 the older binutils, you can patch them with a trivial patch, which
550 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
556 Select the kernel logical page size. Increasing the page size
557 will reduce software overhead at each page boundary, allow
558 hardware prefetch mechanisms to be more effective, and allow
559 larger dma transfers increasing IO efficiency and reducing
560 overhead. However the utilization of memory will increase.
561 For example, each cached file will using a multiple of the
562 page size to hold its contents and the difference between the
563 end of file and the end of page is wasted.
565 Some dedicated systems, such as software raid serving with
566 accelerated calculations, have shown significant increases.
568 If you configure a 64 bit kernel for 64k pages but the
569 processor does not support them, then the kernel will simulate
570 them with 4k pages, loading them on demand, but with the
571 reduced software overhead and larger internal fragmentation.
572 For the 32 bit kernel, a large page option will not be offered
573 unless it is supported by the configured processor.
575 If unsure, choose 4K_PAGES.
579 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
583 depends on 44x || PPC_8xx
587 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
588 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
590 config PPC_256K_PAGES
591 bool "256k page size"
592 depends on 44x && !STDBINUTILS
594 Make the page size 256k.
596 As the ELF standard only requires alignment to support page
597 sizes up to 64k, you will need to compile all of your user
598 space applications with a non-standard binutils settings
599 (see the STDBINUTILS description for details).
601 Say N unless you know what you are doing.
605 config FORCE_MAX_ZONEORDER
606 int "Maximum zone order"
607 range 9 64 if PPC64 && PPC_64K_PAGES
608 default "9" if PPC64 && PPC_64K_PAGES
609 range 13 64 if PPC64 && !PPC_64K_PAGES
610 default "13" if PPC64 && !PPC_64K_PAGES
611 range 9 64 if PPC32 && PPC_16K_PAGES
612 default "9" if PPC32 && PPC_16K_PAGES
613 range 7 64 if PPC32 && PPC_64K_PAGES
614 default "7" if PPC32 && PPC_64K_PAGES
615 range 5 64 if PPC32 && PPC_256K_PAGES
616 default "5" if PPC32 && PPC_256K_PAGES
620 The kernel memory allocator divides physically contiguous memory
621 blocks into "zones", where each zone is a power of two number of
622 pages. This option selects the largest power of two that the kernel
623 keeps in the memory allocator. If you need to allocate very large
624 blocks of physically contiguous memory, then you may need to
627 This config option is actually maximum order plus one. For example,
628 a value of 11 means that the largest free memory block is 2^10 pages.
630 The page size is not necessarily 4KB. For example, on 64-bit
631 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
632 this in mind when choosing a value for this option.
634 config PPC_SUBPAGE_PROT
635 bool "Support setting protections for 4k subpages"
636 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
638 This option adds support for a system call to allow user programs
639 to set access permissions (read/write, readonly, or no access)
640 on the 4k subpages of each 64k page.
642 config PPC_COPRO_BASE
647 bool "SMT (Hyperthreading) scheduler support"
648 depends on PPC64 && SMP
650 SMT scheduler support improves the CPU scheduler's decision making
651 when dealing with POWER5 cpus at a cost of slightly increased
652 overhead in some places. If unsure say N here.
654 config PPC_DENORMALISATION
655 bool "PowerPC denormalisation exception handling"
656 depends on PPC_BOOK3S_64
657 default "y" if PPC_POWERNV
659 Add support for handling denormalisation of single precision
660 values. Useful for bare metal only. If unsure say Y here.
663 bool "Default bootloader kernel arguments"
666 string "Initial kernel command string"
667 depends on CMDLINE_BOOL
668 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
670 On some platforms, there is currently no way for the boot loader to
671 pass arguments to the kernel. For these platforms, you can supply
672 some command-line options at build time by entering them here. In
673 most cases you will need to specify the root device here.
676 bool "Always use the default kernel command string"
677 depends on CMDLINE_BOOL
679 Always use the default kernel command string, even if the boot
680 loader passes other arguments to the kernel.
681 This is useful if you cannot or don't want to change the
682 command-line options your boot loader passes to the kernel.
685 string "Additional default image types"
687 List additional targets to be built by the bootwrapper here (separated
688 by spaces). This is useful for targets that depend of device tree
689 files in the .dts directory.
691 Targets in this list will be build as part of the default build
692 target, or when the user does a 'make zImage' or a
693 'make zImage.initrd'.
695 If unsure, leave blank
697 config ARCH_WANTS_FREEZER_CONTROL
701 source kernel/power/Kconfig
704 bool "Enable seccomp to safely compute untrusted bytecode"
708 This kernel feature is useful for number crunching applications
709 that may need to compute untrusted bytecode during their
710 execution. By using pipes or other transports made available to
711 the process as file descriptors supporting the read/write
712 syscalls, it's possible to isolate those applications in
713 their own address space using seccomp. Once seccomp is
714 enabled via /proc/<pid>/seccomp, it cannot be disabled
715 and the task is only allowed to execute a few safe syscalls
716 defined by each seccomp mode.
718 If unsure, say Y. Only embedded should say N here.
729 bool "Support for ISA-bus hardware"
733 Find out whether you have ISA slots on your motherboard. ISA is the
734 name of a bus system, i.e. the way the CPU talks to the other stuff
735 inside your box. If you have an Apple machine, say N here; if you
736 have an IBM RS/6000 or pSeries machine, say Y. If you have an
737 embedded board, consult your board documentation.
743 config NEED_DMA_MAP_STATE
744 def_bool (PPC64 || NOT_COHERENT_CACHE)
746 config NEED_SG_DMA_LENGTH
749 config GENERIC_ISA_DMA
751 depends on ISA_DMA_API
754 config PPC_INDIRECT_PCI
757 default y if 40x || 44x
771 select PPC_INDIRECT_PCI
777 depends on SUSPEND && (PPC_85xx || PPC_86xx)
779 Freescale MPC85xx/MPC86xx power management controller support
780 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
785 depends on SUSPEND && (44x || 40x)
787 PPC4xx Clock Power Management (CPM) support (suspend/resume).
788 It also enables support for two different idle states (idle-wait
795 bool "Freescale Local Bus support"
798 Enables reporting of errors from the Freescale local bus
799 controller. Also contains some common code used by
800 drivers for specific local bus peripherals.
804 depends on PPC_83xx || QUICC_ENGINE || CPM2
806 Freescale General-purpose Timers support
808 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
812 # Platforms that what PCI turned unconditionally just do select PCI
813 # in their config node. Platforms that want to choose at config
814 # time should select PPC_PCI_CHOICE
815 config PPC_PCI_CHOICE
819 bool "PCI support" if PPC_PCI_CHOICE
820 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
821 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
822 default PCI_QSPAN if !4xx && !CPM2 && 8xx
823 select GENERIC_PCI_IOMAP
825 Find out whether your system includes a PCI bus. PCI is the name of
826 a bus system, i.e. the way the CPU talks to the other stuff inside
827 your box. If you say Y here, the kernel will include drivers and
828 infrastructure code to support PCI bus devices.
838 depends on !4xx && !CPM2 && 8xx
841 Say Y here if you have a system based on a Motorola 8xx-series
842 embedded processor with a QSPAN PCI interface, otherwise say N.
846 depends on PCI && 8260
847 select PPC_INDIRECT_PCI
850 source "drivers/pci/pcie/Kconfig"
852 source "drivers/pci/Kconfig"
854 source "drivers/pcmcia/Kconfig"
856 source "drivers/pci/hotplug/Kconfig"
863 tristate "RapidIO support"
864 depends on HAS_RAPIDIO || PCI
866 If you say Y here, the kernel will include drivers and
867 infrastructure code to support RapidIO interconnect devices.
870 bool "Freescale Embedded SRIO Controller support"
871 depends on RAPIDIO = y && HAS_RAPIDIO
874 Include support for RapidIO controller on Freescale embedded
875 processors (MPC8548, MPC8641, etc).
877 source "drivers/rapidio/Kconfig"
881 config NONSTATIC_KERNEL
885 menu "Advanced setup"
888 config ADVANCED_OPTIONS
889 bool "Prompt for advanced kernel configuration options"
891 This option will enable prompting for a variety of advanced kernel
892 configuration options. These options can cause the kernel to not
893 work if they are set incorrectly, but can be used to optimize certain
894 aspects of kernel memory management.
896 Unless you know what you are doing, say N here.
898 comment "Default settings for advanced configuration options are used"
899 depends on !ADVANCED_OPTIONS
901 config LOWMEM_SIZE_BOOL
902 bool "Set maximum low memory"
903 depends on ADVANCED_OPTIONS
905 This option allows you to set the maximum amount of memory which
906 will be used as "low memory", that is, memory which the kernel can
907 access directly, without having to set up a kernel virtual mapping.
908 This can be useful in optimizing the layout of kernel virtual
911 Say N here unless you know what you are doing.
914 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
917 config LOWMEM_CAM_NUM_BOOL
918 bool "Set number of CAMs to use to map low memory"
919 depends on ADVANCED_OPTIONS && FSL_BOOKE
921 This option allows you to set the maximum number of CAM slots that
922 will be used to map low memory. There are a limited number of slots
923 available and even more limited number that will fit in the L1 MMU.
924 However, using more entries will allow mapping more low memory. This
925 can be useful in optimizing the layout of kernel virtual memory.
927 Say N here unless you know what you are doing.
929 config LOWMEM_CAM_NUM
931 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
934 config DYNAMIC_MEMSTART
935 bool "Enable page aligned dynamic load address for kernel"
936 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
937 select NONSTATIC_KERNEL
939 This option enables the kernel to be loaded at any page aligned
940 physical address. The kernel creates a mapping from KERNELBASE to
941 the address where the kernel is loaded. The page size here implies
942 the TLB page size of the mapping for kernel on the particular platform.
943 Please refer to the init code for finding the TLB page size.
945 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
946 kernel image, where the only restriction is the page aligned kernel
947 load address. When this option is enabled, the compile time physical
948 address CONFIG_PHYSICAL_START is ignored.
950 This option is overridden by CONFIG_RELOCATABLE
953 bool "Build a relocatable kernel"
954 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
955 select NONSTATIC_KERNEL
957 This builds a kernel image that is capable of running at the
958 location the kernel is loaded at, without any alignment restrictions.
959 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
961 One use is for the kexec on panic case where the recovery kernel
962 must live at a different physical address than the primary
965 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
966 it has been loaded at and the compile time physical addresses
967 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
968 setting can still be useful to bootwrappers that need to know the
969 load address of the kernel (eg. u-boot/mkimage).
971 config RELOCATABLE_PPC32
973 depends on PPC32 && RELOCATABLE
975 config PAGE_OFFSET_BOOL
976 bool "Set custom page offset address"
977 depends on ADVANCED_OPTIONS
979 This option allows you to set the kernel virtual address at which
980 the kernel will map low memory. This can be useful in optimizing
981 the virtual memory layout of the system.
983 Say N here unless you know what you are doing.
986 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
989 config KERNEL_START_BOOL
990 bool "Set custom kernel base address"
991 depends on ADVANCED_OPTIONS
993 This option allows you to set the kernel virtual address at which
994 the kernel will be loaded. Normally this should match PAGE_OFFSET
995 however there are times (like kdump) that one might not want them
998 Say N here unless you know what you are doing.
1001 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1002 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1003 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1004 default "0xc0000000"
1006 config PHYSICAL_START_BOOL
1007 bool "Set physical address where the kernel is loaded"
1008 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1010 This gives the physical address where the kernel is loaded.
1012 Say N here unless you know what you are doing.
1014 config PHYSICAL_START
1015 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1016 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1017 default "0x00000000"
1019 config PHYSICAL_ALIGN
1021 default "0x04000000" if FSL_BOOKE
1023 This value puts the alignment restrictions on physical address
1024 where kernel is loaded and run from. Kernel is compiled for an
1025 address which meets above alignment restriction.
1027 config TASK_SIZE_BOOL
1028 bool "Set custom user task size"
1029 depends on ADVANCED_OPTIONS
1031 This option allows you to set the amount of virtual address space
1032 allocated to user tasks. This can be useful in optimizing the
1033 virtual memory layout of the system.
1035 Say N here unless you know what you are doing.
1038 hex "Size of user task space" if TASK_SIZE_BOOL
1039 default "0x80000000" if PPC_8xx
1040 default "0xc0000000"
1042 config CONSISTENT_SIZE_BOOL
1043 bool "Set custom consistent memory pool size"
1044 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1046 This option allows you to set the size of the
1047 consistent memory pool. This pool of virtual memory
1048 is used to make consistent memory allocations.
1050 config CONSISTENT_SIZE
1051 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1052 default "0x00200000" if NOT_COHERENT_CACHE
1055 bool "Pinned Kernel TLBs (860 ONLY)"
1056 depends on ADVANCED_OPTIONS && 8xx
1061 bool "Build a relocatable kernel"
1062 depends on !COMPILE_TEST
1063 select NONSTATIC_KERNEL
1065 This builds a kernel image that is capable of running anywhere
1066 in the RMA (real memory area) at any 16k-aligned base address.
1067 The kernel is linked as a position-independent executable (PIE)
1068 and contains dynamic relocations which are processed early
1069 in the bootup process.
1071 One use is for the kexec on panic case where the recovery kernel
1072 must live at a different physical address than the primary
1075 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1078 default "0xc000000000000000"
1081 default "0xc000000000000000"
1082 config PHYSICAL_START
1084 default "0x00000000"
1090 source "net/Kconfig"
1092 source "drivers/Kconfig"
1096 source "lib/Kconfig"
1098 source "arch/powerpc/Kconfig.debug"
1100 source "security/Kconfig"
1104 depends on COMPAT && KEYS
1107 source "crypto/Kconfig"
1109 config PPC_LIB_RHEAP
1112 source "arch/powerpc/kvm/Kconfig"