1 source "arch/powerpc/platforms/Kconfig.cputype"
20 config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
23 config ARCH_DMA_ADDR_T_64BIT
24 def_bool ARCH_PHYS_ADDR_T_64BIT
30 config HAVE_SETUP_PER_CPU_AREA
33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
37 int "Number of virtual interrupt numbers"
41 This defines the number of virtual interrupt numbers the kernel
42 can manage. Virtual interrupt numbers are what you see in
43 /proc/interrupts. If you configure your system to have too few,
44 drivers will fail to load or worse - handle with care.
46 config STACKTRACE_SUPPORT
50 config HAVE_LATENCYTOP_SUPPORT
53 config TRACE_IRQFLAGS_SUPPORT
57 config LOCKDEP_SUPPORT
61 config RWSEM_GENERIC_SPINLOCK
64 config RWSEM_XCHGADD_ALGORITHM
68 config GENERIC_LOCKBREAK
71 depends on SMP && PREEMPT
73 config ARCH_HAS_ILOG2_U32
77 config ARCH_HAS_ILOG2_U64
81 config GENERIC_HWEIGHT
88 select ARCH_MIGHT_HAVE_PC_PARPORT
89 select ARCH_MIGHT_HAVE_PC_SERIO
92 select OF_EARLY_FLATTREE
93 select OF_RESERVED_MEM
94 select HAVE_FTRACE_MCOUNT_RECORD
95 select HAVE_DYNAMIC_FTRACE
96 select HAVE_FUNCTION_TRACER
97 select HAVE_FUNCTION_GRAPH_TRACER
98 select SYSCTL_EXCEPTION_TRACE
99 select ARCH_WANT_OPTIONAL_GPIOLIB
100 select VIRT_TO_BUS if !PPC64
102 select HAVE_IOREMAP_PROT
103 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
105 select HAVE_ARCH_KGDB
106 select HAVE_KRETPROBES
107 select HAVE_ARCH_TRACEHOOK
109 select HAVE_MEMBLOCK_NODE_MAP
110 select HAVE_DMA_ATTRS
111 select HAVE_DMA_API_DEBUG
113 select HAVE_DEBUG_KMEMLEAK
114 select ARCH_HAS_SG_CHAIN
115 select GENERIC_ATOMIC64 if PPC32
116 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
117 select HAVE_PERF_EVENTS
118 select HAVE_REGS_AND_STACK_ACCESS_API
119 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
120 select ARCH_WANT_IPC_PARSE_VERSION
123 select GENERIC_IRQ_SHOW
124 select GENERIC_IRQ_SHOW_LEVEL
125 select IRQ_FORCED_THREADING
126 select HAVE_RCU_TABLE_FREE if SMP
127 select HAVE_SYSCALL_TRACEPOINTS
128 select HAVE_BPF_JIT if PPC64
129 select HAVE_ARCH_JUMP_LABEL
130 select ARCH_HAVE_NMI_SAFE_CMPXCHG
131 select GENERIC_SMP_IDLE_THREAD
132 select GENERIC_CMOS_UPDATE
133 select GENERIC_TIME_VSYSCALL_OLD
134 select GENERIC_CLOCKEVENTS
135 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
136 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
137 select GENERIC_STRNCPY_FROM_USER
138 select GENERIC_STRNLEN_USER
139 select HAVE_MOD_ARCH_SPECIFIC
140 select MODULES_USE_ELF_RELA
141 select CLONE_BACKWARDS
142 select ARCH_USE_BUILTIN_BSWAP
143 select OLD_SIGSUSPEND
144 select OLD_SIGACTION if PPC32
145 select HAVE_DEBUG_STACKOVERFLOW
146 select HAVE_IRQ_EXIT_ON_IRQ_STACK
147 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
148 select HAVE_ARCH_AUDITSYSCALL
149 select ARCH_SUPPORTS_ATOMIC_RMW
150 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
153 def_bool CPU_LITTLE_ENDIAN
166 select COMPAT_BINFMT_ELF
167 select ARCH_WANT_OLD_COMPAT_IPC
168 select COMPAT_OLD_SIGACTION
170 config SYSVIPC_COMPAT
172 depends on COMPAT && SYSVIPC
175 # All PPC32s use generic nvram driver through ppc_md
180 config SCHED_OMIT_FRAME_POINTER
184 config ARCH_MAY_HAVE_PC_FDC
191 config PPC_UDBG_16550
195 config GENERIC_TBSYNC
197 default y if PPC32 && SMP
209 config SYS_SUPPORTS_APM_EMULATION
210 default y if PMAC_APM_EMU
216 Used to allow a board to specify it wants an ePAPR compliant wrapper.
219 config DEFAULT_UIMAGE
222 Used to allow a board to specify it wants a uImage built by default
225 config ARCH_HIBERNATION_POSSIBLE
229 config ARCH_SUSPEND_POSSIBLE
231 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
232 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
235 config PPC_DCR_NATIVE
245 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
248 config PPC_OF_PLATFORM_PCI
251 depends on PPC64 # not supported on 32 bits yet
254 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
257 config ARCH_SUPPORTS_UPROBES
260 config PPC_ADV_DEBUG_REGS
262 depends on 40x || BOOKE
265 config PPC_ADV_DEBUG_IACS
267 depends on PPC_ADV_DEBUG_REGS
271 config PPC_ADV_DEBUG_DACS
273 depends on PPC_ADV_DEBUG_REGS
276 config PPC_ADV_DEBUG_DVCS
278 depends on PPC_ADV_DEBUG_REGS
282 config PPC_ADV_DEBUG_DAC_RANGE
284 depends on PPC_ADV_DEBUG_REGS && 44x
287 config PPC_EMULATE_SSTEP
289 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
295 source "init/Kconfig"
297 source "kernel/Kconfig.freezer"
299 source "arch/powerpc/sysdev/Kconfig"
300 source "arch/powerpc/platforms/Kconfig"
302 menu "Kernel options"
305 bool "High memory support"
308 source kernel/Kconfig.hz
309 source kernel/Kconfig.preempt
310 source "fs/Kconfig.binfmt"
312 config HUGETLB_PAGE_SIZE_VARIABLE
314 depends on HUGETLB_PAGE
317 config MATH_EMULATION
318 bool "Math emulation"
319 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
321 Some PowerPC chips designed for embedded applications do not have
322 a floating-point unit and therefore do not implement the
323 floating-point instructions in the PowerPC instruction set. If you
324 say Y here, the kernel will include code to emulate a floating-point
325 unit, which will allow programs that use floating-point
328 This is also useful to emulate missing (optional) instructions
329 such as fsqrt on cores that do have an FPU but do not implement
330 them (such as Freescale BookE).
333 prompt "Math emulation options"
334 default MATH_EMULATION_FULL
335 depends on MATH_EMULATION
337 config MATH_EMULATION_FULL
338 bool "Emulate all the floating point instructions"
340 Select this option will enable the kernel to support to emulate
341 all the floating point instructions. If your SoC doesn't have
342 a FPU, you should select this.
344 config MATH_EMULATION_HW_UNIMPLEMENTED
345 bool "Just emulate the FPU unimplemented instructions"
347 Select this if you know there does have a hardware FPU on your
348 SoC, but some floating point instructions are not implemented by that.
352 config PPC_TRANSACTIONAL_MEM
353 bool "Transactional Memory support for POWERPC"
354 depends on PPC_BOOK3S_64
360 Support user-mode Transactional Memory on POWERPC.
366 bool "SWIOTLB support"
370 Support for IO bounce buffering for systems without an IOMMU.
371 This allows us to DMA to the full physical address space on
372 platforms where the size of a physical address is larger
373 than the bus address. Not all platforms support this.
376 bool "Support for enabling/disabling CPUs"
377 depends on SMP && (PPC_PSERIES || \
378 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
380 Say Y here to be able to disable and re-enable individual
381 CPUs at runtime on SMP machines.
383 Say N if you are unsure.
385 config ARCH_CPU_PROBE_RELEASE
387 depends on HOTPLUG_CPU
389 config ARCH_ENABLE_MEMORY_HOTPLUG
392 config ARCH_HAS_WALK_MEMORY
395 config ARCH_ENABLE_MEMORY_HOTREMOVE
398 config PPC64_SUPPORTS_MEMORY_FAILURE
399 bool "Add support for memory hwpoison"
400 depends on PPC_BOOK3S_64
401 default "y" if PPC_POWERNV
402 select ARCH_SUPPORTS_MEMORY_FAILURE
405 bool "kexec system call"
406 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
408 kexec is a system call that implements the ability to shutdown your
409 current kernel, and to start another kernel. It is like a reboot
410 but it is independent of the system firmware. And like a reboot
411 you can start any kernel with it, not just Linux.
413 The name comes from the similarity to the exec system call.
415 It is an ongoing process to be certain the hardware in a machine
416 is properly shutdown, so do not be surprised if this code does not
417 initially work for you. As of this writing the exact hardware
418 interface is strongly in flux, so no good recommendation can be
422 bool "Build a kdump crash kernel"
423 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
424 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
426 Build a kernel suitable for use as a kdump capture kernel.
427 The same kernel binary can be used as production kernel and dump
431 bool "Firmware-assisted dump"
432 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
434 A robust mechanism to get reliable kernel crash dump with
435 assistance from firmware. This approach does not use kexec,
436 instead firmware assists in booting the kdump kernel
437 while preserving memory contents. Firmware-assisted dump
438 is meant to be a kdump replacement offering robustness and
439 speed not possible without system firmware assistance.
444 bool "Distribute interrupts on all CPUs by default"
447 This option gives the kernel permission to distribute IRQs across
448 multiple CPUs. Saying N here will route all IRQs to the first
449 CPU. Generally saying Y is safe, although some problems have been
450 reported with SMP Power Macintoshes with this option enabled.
455 default y if SMP && PPC_PSERIES
461 depends on NEED_MULTIPLE_NODES
463 config USE_PERCPU_NUMA_NODE_ID
467 config HAVE_MEMORYLESS_NODES
471 config ARCH_SELECT_MEMORY_MODEL
475 config ARCH_FLATMEM_ENABLE
477 depends on (PPC64 && !NUMA) || PPC32
479 config ARCH_SPARSEMEM_ENABLE
482 select SPARSEMEM_VMEMMAP_ENABLE
484 config ARCH_SPARSEMEM_DEFAULT
486 depends on (SMP && PPC_PSERIES) || PPC_PS3
488 config SYS_SUPPORTS_HUGETLBFS
493 config ARCH_MEMORY_PROBE
495 depends on MEMORY_HOTPLUG
497 # Some NUMA nodes have memory ranges that span
498 # other nodes. Even though a pfn is valid and
499 # between a node's start and end pfns, it may not
500 # reside on that node. See memmap_init_zone()
502 config NODES_SPAN_OTHER_NODES
504 depends on NEED_MULTIPLE_NODES
506 config PPC_HAS_HASH_64K
512 bool "Using standard binutils settings"
516 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
517 Note, that kernel will be able to run only those applications,
518 which had been compiled using binutils later than 2.17.50.0.3 with
519 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
520 the older binutils, you can patch them with a trivial patch, which
521 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
527 Select the kernel logical page size. Increasing the page size
528 will reduce software overhead at each page boundary, allow
529 hardware prefetch mechanisms to be more effective, and allow
530 larger dma transfers increasing IO efficiency and reducing
531 overhead. However the utilization of memory will increase.
532 For example, each cached file will using a multiple of the
533 page size to hold its contents and the difference between the
534 end of file and the end of page is wasted.
536 Some dedicated systems, such as software raid serving with
537 accelerated calculations, have shown significant increases.
539 If you configure a 64 bit kernel for 64k pages but the
540 processor does not support them, then the kernel will simulate
541 them with 4k pages, loading them on demand, but with the
542 reduced software overhead and larger internal fragmentation.
543 For the 32 bit kernel, a large page option will not be offered
544 unless it is supported by the configured processor.
546 If unsure, choose 4K_PAGES.
552 bool "16k page size" if 44x
555 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
556 depends on !PPC_FSL_BOOK3E
557 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
559 config PPC_256K_PAGES
560 bool "256k page size" if 44x
561 depends on !STDBINUTILS
563 Make the page size 256k.
565 As the ELF standard only requires alignment to support page
566 sizes up to 64k, you will need to compile all of your user
567 space applications with a non-standard binutils settings
568 (see the STDBINUTILS description for details).
570 Say N unless you know what you are doing.
574 config FORCE_MAX_ZONEORDER
575 int "Maximum zone order"
576 range 9 64 if PPC64 && PPC_64K_PAGES
577 default "9" if PPC64 && PPC_64K_PAGES
578 range 13 64 if PPC64 && !PPC_64K_PAGES
579 default "13" if PPC64 && !PPC_64K_PAGES
580 range 9 64 if PPC32 && PPC_16K_PAGES
581 default "9" if PPC32 && PPC_16K_PAGES
582 range 7 64 if PPC32 && PPC_64K_PAGES
583 default "7" if PPC32 && PPC_64K_PAGES
584 range 5 64 if PPC32 && PPC_256K_PAGES
585 default "5" if PPC32 && PPC_256K_PAGES
589 The kernel memory allocator divides physically contiguous memory
590 blocks into "zones", where each zone is a power of two number of
591 pages. This option selects the largest power of two that the kernel
592 keeps in the memory allocator. If you need to allocate very large
593 blocks of physically contiguous memory, then you may need to
596 This config option is actually maximum order plus one. For example,
597 a value of 11 means that the largest free memory block is 2^10 pages.
599 The page size is not necessarily 4KB. For example, on 64-bit
600 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
601 this in mind when choosing a value for this option.
603 config PPC_SUBPAGE_PROT
604 bool "Support setting protections for 4k subpages"
605 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
607 This option adds support for a system call to allow user programs
608 to set access permissions (read/write, readonly, or no access)
609 on the 4k subpages of each 64k page.
611 config PPC_COPRO_BASE
616 bool "SMT (Hyperthreading) scheduler support"
617 depends on PPC64 && SMP
619 SMT scheduler support improves the CPU scheduler's decision making
620 when dealing with POWER5 cpus at a cost of slightly increased
621 overhead in some places. If unsure say N here.
623 config PPC_DENORMALISATION
624 bool "PowerPC denormalisation exception handling"
625 depends on PPC_BOOK3S_64
626 default "y" if PPC_POWERNV
628 Add support for handling denormalisation of single precision
629 values. Useful for bare metal only. If unsure say Y here.
632 bool "Default bootloader kernel arguments"
635 string "Initial kernel command string"
636 depends on CMDLINE_BOOL
637 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
639 On some platforms, there is currently no way for the boot loader to
640 pass arguments to the kernel. For these platforms, you can supply
641 some command-line options at build time by entering them here. In
642 most cases you will need to specify the root device here.
645 bool "Always use the default kernel command string"
646 depends on CMDLINE_BOOL
648 Always use the default kernel command string, even if the boot
649 loader passes other arguments to the kernel.
650 This is useful if you cannot or don't want to change the
651 command-line options your boot loader passes to the kernel.
654 string "Additional default image types"
656 List additional targets to be built by the bootwrapper here (separated
657 by spaces). This is useful for targets that depend of device tree
658 files in the .dts directory.
660 Targets in this list will be build as part of the default build
661 target, or when the user does a 'make zImage' or a
662 'make zImage.initrd'.
664 If unsure, leave blank
666 config ARCH_WANTS_FREEZER_CONTROL
670 source kernel/power/Kconfig
673 bool "Enable seccomp to safely compute untrusted bytecode"
677 This kernel feature is useful for number crunching applications
678 that may need to compute untrusted bytecode during their
679 execution. By using pipes or other transports made available to
680 the process as file descriptors supporting the read/write
681 syscalls, it's possible to isolate those applications in
682 their own address space using seccomp. Once seccomp is
683 enabled via /proc/<pid>/seccomp, it cannot be disabled
684 and the task is only allowed to execute a few safe syscalls
685 defined by each seccomp mode.
687 If unsure, say Y. Only embedded should say N here.
698 bool "Support for ISA-bus hardware"
702 Find out whether you have ISA slots on your motherboard. ISA is the
703 name of a bus system, i.e. the way the CPU talks to the other stuff
704 inside your box. If you have an Apple machine, say N here; if you
705 have an IBM RS/6000 or pSeries machine, say Y. If you have an
706 embedded board, consult your board documentation.
712 config NEED_DMA_MAP_STATE
713 def_bool (PPC64 || NOT_COHERENT_CACHE)
715 config NEED_SG_DMA_LENGTH
718 config GENERIC_ISA_DMA
720 depends on ISA_DMA_API
723 config PPC_INDIRECT_PCI
726 default y if 40x || 44x
740 select PPC_INDIRECT_PCI
746 depends on SUSPEND && (PPC_85xx || PPC_86xx)
748 Freescale MPC85xx/MPC86xx power management controller support
749 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
754 depends on SUSPEND && (44x || 40x)
756 PPC4xx Clock Power Management (CPM) support (suspend/resume).
757 It also enables support for two different idle states (idle-wait
764 bool "Freescale Local Bus support"
767 Enables reporting of errors from the Freescale local bus
768 controller. Also contains some common code used by
769 drivers for specific local bus peripherals.
773 depends on PPC_83xx || QUICC_ENGINE || CPM2
775 Freescale General-purpose Timers support
777 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
781 # Platforms that what PCI turned unconditionally just do select PCI
782 # in their config node. Platforms that want to choose at config
783 # time should select PPC_PCI_CHOICE
784 config PPC_PCI_CHOICE
788 bool "PCI support" if PPC_PCI_CHOICE
789 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
790 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
791 default PCI_QSPAN if !4xx && !CPM2 && 8xx
792 select GENERIC_PCI_IOMAP
794 Find out whether your system includes a PCI bus. PCI is the name of
795 a bus system, i.e. the way the CPU talks to the other stuff inside
796 your box. If you say Y here, the kernel will include drivers and
797 infrastructure code to support PCI bus devices.
807 depends on !4xx && !CPM2 && 8xx
810 Say Y here if you have a system based on a Motorola 8xx-series
811 embedded processor with a QSPAN PCI interface, otherwise say N.
815 depends on PCI && 8260
816 select PPC_INDIRECT_PCI
819 source "drivers/pci/pcie/Kconfig"
821 source "drivers/pci/Kconfig"
823 source "drivers/pcmcia/Kconfig"
825 source "drivers/pci/hotplug/Kconfig"
832 tristate "RapidIO support"
833 depends on HAS_RAPIDIO || PCI
835 If you say Y here, the kernel will include drivers and
836 infrastructure code to support RapidIO interconnect devices.
839 bool "Freescale Embedded SRIO Controller support"
840 depends on RAPIDIO = y && HAS_RAPIDIO
843 Include support for RapidIO controller on Freescale embedded
844 processors (MPC8548, MPC8641, etc).
846 source "drivers/rapidio/Kconfig"
850 config NONSTATIC_KERNEL
854 menu "Advanced setup"
857 config ADVANCED_OPTIONS
858 bool "Prompt for advanced kernel configuration options"
860 This option will enable prompting for a variety of advanced kernel
861 configuration options. These options can cause the kernel to not
862 work if they are set incorrectly, but can be used to optimize certain
863 aspects of kernel memory management.
865 Unless you know what you are doing, say N here.
867 comment "Default settings for advanced configuration options are used"
868 depends on !ADVANCED_OPTIONS
870 config LOWMEM_SIZE_BOOL
871 bool "Set maximum low memory"
872 depends on ADVANCED_OPTIONS
874 This option allows you to set the maximum amount of memory which
875 will be used as "low memory", that is, memory which the kernel can
876 access directly, without having to set up a kernel virtual mapping.
877 This can be useful in optimizing the layout of kernel virtual
880 Say N here unless you know what you are doing.
883 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
886 config LOWMEM_CAM_NUM_BOOL
887 bool "Set number of CAMs to use to map low memory"
888 depends on ADVANCED_OPTIONS && FSL_BOOKE
890 This option allows you to set the maximum number of CAM slots that
891 will be used to map low memory. There are a limited number of slots
892 available and even more limited number that will fit in the L1 MMU.
893 However, using more entries will allow mapping more low memory. This
894 can be useful in optimizing the layout of kernel virtual memory.
896 Say N here unless you know what you are doing.
898 config LOWMEM_CAM_NUM
900 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
903 config DYNAMIC_MEMSTART
904 bool "Enable page aligned dynamic load address for kernel"
905 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
906 select NONSTATIC_KERNEL
908 This option enables the kernel to be loaded at any page aligned
909 physical address. The kernel creates a mapping from KERNELBASE to
910 the address where the kernel is loaded. The page size here implies
911 the TLB page size of the mapping for kernel on the particular platform.
912 Please refer to the init code for finding the TLB page size.
914 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
915 kernel image, where the only restriction is the page aligned kernel
916 load address. When this option is enabled, the compile time physical
917 address CONFIG_PHYSICAL_START is ignored.
919 This option is overridden by CONFIG_RELOCATABLE
922 bool "Build a relocatable kernel"
923 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
924 select NONSTATIC_KERNEL
926 This builds a kernel image that is capable of running at the
927 location the kernel is loaded at, without any alignment restrictions.
928 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
930 One use is for the kexec on panic case where the recovery kernel
931 must live at a different physical address than the primary
934 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
935 it has been loaded at and the compile time physical addresses
936 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
937 setting can still be useful to bootwrappers that need to know the
938 load address of the kernel (eg. u-boot/mkimage).
940 config RELOCATABLE_PPC32
942 depends on PPC32 && RELOCATABLE
944 config PAGE_OFFSET_BOOL
945 bool "Set custom page offset address"
946 depends on ADVANCED_OPTIONS
948 This option allows you to set the kernel virtual address at which
949 the kernel will map low memory. This can be useful in optimizing
950 the virtual memory layout of the system.
952 Say N here unless you know what you are doing.
955 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
958 config KERNEL_START_BOOL
959 bool "Set custom kernel base address"
960 depends on ADVANCED_OPTIONS
962 This option allows you to set the kernel virtual address at which
963 the kernel will be loaded. Normally this should match PAGE_OFFSET
964 however there are times (like kdump) that one might not want them
967 Say N here unless you know what you are doing.
970 hex "Virtual address of kernel base" if KERNEL_START_BOOL
971 default PAGE_OFFSET if PAGE_OFFSET_BOOL
972 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
975 config PHYSICAL_START_BOOL
976 bool "Set physical address where the kernel is loaded"
977 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
979 This gives the physical address where the kernel is loaded.
981 Say N here unless you know what you are doing.
983 config PHYSICAL_START
984 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
985 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
988 config PHYSICAL_ALIGN
990 default "0x04000000" if FSL_BOOKE
992 This value puts the alignment restrictions on physical address
993 where kernel is loaded and run from. Kernel is compiled for an
994 address which meets above alignment restriction.
996 config TASK_SIZE_BOOL
997 bool "Set custom user task size"
998 depends on ADVANCED_OPTIONS
1000 This option allows you to set the amount of virtual address space
1001 allocated to user tasks. This can be useful in optimizing the
1002 virtual memory layout of the system.
1004 Say N here unless you know what you are doing.
1007 hex "Size of user task space" if TASK_SIZE_BOOL
1008 default "0x80000000" if PPC_8xx
1009 default "0xc0000000"
1011 config CONSISTENT_SIZE_BOOL
1012 bool "Set custom consistent memory pool size"
1013 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1015 This option allows you to set the size of the
1016 consistent memory pool. This pool of virtual memory
1017 is used to make consistent memory allocations.
1019 config CONSISTENT_SIZE
1020 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1021 default "0x00200000" if NOT_COHERENT_CACHE
1024 bool "Pinned Kernel TLBs (860 ONLY)"
1025 depends on ADVANCED_OPTIONS && 8xx
1030 bool "Build a relocatable kernel"
1031 depends on !COMPILE_TEST
1032 select NONSTATIC_KERNEL
1034 This builds a kernel image that is capable of running anywhere
1035 in the RMA (real memory area) at any 16k-aligned base address.
1036 The kernel is linked as a position-independent executable (PIE)
1037 and contains dynamic relocations which are processed early
1038 in the bootup process.
1040 One use is for the kexec on panic case where the recovery kernel
1041 must live at a different physical address than the primary
1044 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1047 default "0xc000000000000000"
1050 default "0xc000000000000000"
1051 config PHYSICAL_START
1053 default "0x00000000"
1059 source "net/Kconfig"
1061 source "drivers/Kconfig"
1065 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1067 source "lib/Kconfig"
1069 source "arch/powerpc/Kconfig.debug"
1071 source "security/Kconfig"
1075 depends on COMPAT && KEYS
1078 source "crypto/Kconfig"
1080 config PPC_LIB_RHEAP
1083 source "arch/powerpc/kvm/Kconfig"