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
91 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
93 select OF_EARLY_FLATTREE
94 select OF_RESERVED_MEM
95 select HAVE_FTRACE_MCOUNT_RECORD
96 select HAVE_DYNAMIC_FTRACE
97 select HAVE_FUNCTION_TRACER
98 select HAVE_FUNCTION_GRAPH_TRACER
99 select SYSCTL_EXCEPTION_TRACE
100 select ARCH_WANT_OPTIONAL_GPIOLIB
101 select VIRT_TO_BUS if !PPC64
103 select HAVE_IOREMAP_PROT
104 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
106 select HAVE_ARCH_KGDB
107 select HAVE_KRETPROBES
108 select HAVE_ARCH_TRACEHOOK
110 select HAVE_MEMBLOCK_NODE_MAP
111 select HAVE_DMA_ATTRS
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
129 select HAVE_BPF_JIT if PPC64
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
157 def_bool CPU_LITTLE_ENDIAN
170 select COMPAT_BINFMT_ELF
171 select ARCH_WANT_OLD_COMPAT_IPC
172 select COMPAT_OLD_SIGACTION
174 config SYSVIPC_COMPAT
176 depends on COMPAT && SYSVIPC
179 # All PPC32s use generic nvram driver through ppc_md
184 config SCHED_OMIT_FRAME_POINTER
188 config ARCH_MAY_HAVE_PC_FDC
195 config PPC_UDBG_16550
199 config GENERIC_TBSYNC
201 default y if PPC32 && SMP
213 config SYS_SUPPORTS_APM_EMULATION
214 default y if PMAC_APM_EMU
220 Used to allow a board to specify it wants an ePAPR compliant wrapper.
223 config DEFAULT_UIMAGE
226 Used to allow a board to specify it wants a uImage built by default
229 config ARCH_HIBERNATION_POSSIBLE
233 config ARCH_SUSPEND_POSSIBLE
235 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
236 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
239 config PPC_DCR_NATIVE
249 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
252 config PPC_OF_PLATFORM_PCI
255 depends on PPC64 # not supported on 32 bits yet
258 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
261 config ARCH_SUPPORTS_UPROBES
264 config PPC_ADV_DEBUG_REGS
266 depends on 40x || BOOKE
269 config PPC_ADV_DEBUG_IACS
271 depends on PPC_ADV_DEBUG_REGS
275 config PPC_ADV_DEBUG_DACS
277 depends on PPC_ADV_DEBUG_REGS
280 config PPC_ADV_DEBUG_DVCS
282 depends on PPC_ADV_DEBUG_REGS
286 config PPC_ADV_DEBUG_DAC_RANGE
288 depends on PPC_ADV_DEBUG_REGS && 44x
291 config PPC_EMULATE_SSTEP
293 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
299 source "init/Kconfig"
301 source "kernel/Kconfig.freezer"
303 source "arch/powerpc/sysdev/Kconfig"
304 source "arch/powerpc/platforms/Kconfig"
306 menu "Kernel options"
309 bool "High memory support"
312 source kernel/Kconfig.hz
313 source kernel/Kconfig.preempt
314 source "fs/Kconfig.binfmt"
316 config HUGETLB_PAGE_SIZE_VARIABLE
318 depends on HUGETLB_PAGE
321 config MATH_EMULATION
322 bool "Math emulation"
323 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
325 Some PowerPC chips designed for embedded applications do not have
326 a floating-point unit and therefore do not implement the
327 floating-point instructions in the PowerPC instruction set. If you
328 say Y here, the kernel will include code to emulate a floating-point
329 unit, which will allow programs that use floating-point
332 This is also useful to emulate missing (optional) instructions
333 such as fsqrt on cores that do have an FPU but do not implement
334 them (such as Freescale BookE).
337 prompt "Math emulation options"
338 default MATH_EMULATION_FULL
339 depends on MATH_EMULATION
341 config MATH_EMULATION_FULL
342 bool "Emulate all the floating point instructions"
344 Select this option will enable the kernel to support to emulate
345 all the floating point instructions. If your SoC doesn't have
346 a FPU, you should select this.
348 config MATH_EMULATION_HW_UNIMPLEMENTED
349 bool "Just emulate the FPU unimplemented instructions"
351 Select this if you know there does have a hardware FPU on your
352 SoC, but some floating point instructions are not implemented by that.
356 config PPC_TRANSACTIONAL_MEM
357 bool "Transactional Memory support for POWERPC"
358 depends on PPC_BOOK3S_64
364 Support user-mode Transactional Memory on POWERPC.
370 bool "SWIOTLB support"
374 Support for IO bounce buffering for systems without an IOMMU.
375 This allows us to DMA to the full physical address space on
376 platforms where the size of a physical address is larger
377 than the bus address. Not all platforms support this.
380 bool "Support for enabling/disabling CPUs"
381 depends on SMP && (PPC_PSERIES || \
382 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
384 Say Y here to be able to disable and re-enable individual
385 CPUs at runtime on SMP machines.
387 Say N if you are unsure.
389 config ARCH_CPU_PROBE_RELEASE
391 depends on HOTPLUG_CPU
393 config ARCH_ENABLE_MEMORY_HOTPLUG
396 config ARCH_HAS_WALK_MEMORY
399 config ARCH_ENABLE_MEMORY_HOTREMOVE
402 config PPC64_SUPPORTS_MEMORY_FAILURE
403 bool "Add support for memory hwpoison"
404 depends on PPC_BOOK3S_64
405 default "y" if PPC_POWERNV
406 select ARCH_SUPPORTS_MEMORY_FAILURE
409 bool "kexec system call"
410 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
412 kexec is a system call that implements the ability to shutdown your
413 current kernel, and to start another kernel. It is like a reboot
414 but it is independent of the system firmware. And like a reboot
415 you can start any kernel with it, not just Linux.
417 The name comes from the similarity to the exec system call.
419 It is an ongoing process to be certain the hardware in a machine
420 is properly shutdown, so do not be surprised if this code does not
421 initially work for you. As of this writing the exact hardware
422 interface is strongly in flux, so no good recommendation can be
426 bool "Build a kdump crash kernel"
427 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
428 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
430 Build a kernel suitable for use as a kdump capture kernel.
431 The same kernel binary can be used as production kernel and dump
435 bool "Firmware-assisted dump"
436 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
438 A robust mechanism to get reliable kernel crash dump with
439 assistance from firmware. This approach does not use kexec,
440 instead firmware assists in booting the kdump kernel
441 while preserving memory contents. Firmware-assisted dump
442 is meant to be a kdump replacement offering robustness and
443 speed not possible without system firmware assistance.
448 bool "Distribute interrupts on all CPUs by default"
451 This option gives the kernel permission to distribute IRQs across
452 multiple CPUs. Saying N here will route all IRQs to the first
453 CPU. Generally saying Y is safe, although some problems have been
454 reported with SMP Power Macintoshes with this option enabled.
459 default y if SMP && PPC_PSERIES
465 depends on NEED_MULTIPLE_NODES
467 config USE_PERCPU_NUMA_NODE_ID
471 config HAVE_MEMORYLESS_NODES
475 config ARCH_SELECT_MEMORY_MODEL
479 config ARCH_FLATMEM_ENABLE
481 depends on (PPC64 && !NUMA) || PPC32
483 config ARCH_SPARSEMEM_ENABLE
486 select SPARSEMEM_VMEMMAP_ENABLE
488 config ARCH_SPARSEMEM_DEFAULT
490 depends on (SMP && PPC_PSERIES) || PPC_PS3
492 config SYS_SUPPORTS_HUGETLBFS
497 config ARCH_MEMORY_PROBE
499 depends on MEMORY_HOTPLUG
501 # Some NUMA nodes have memory ranges that span
502 # other nodes. Even though a pfn is valid and
503 # between a node's start and end pfns, it may not
504 # reside on that node. See memmap_init_zone()
506 config NODES_SPAN_OTHER_NODES
508 depends on NEED_MULTIPLE_NODES
510 config PPC_HAS_HASH_64K
516 bool "Using standard binutils settings"
520 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
521 Note, that kernel will be able to run only those applications,
522 which had been compiled using binutils later than 2.17.50.0.3 with
523 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
524 the older binutils, you can patch them with a trivial patch, which
525 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
531 Select the kernel logical page size. Increasing the page size
532 will reduce software overhead at each page boundary, allow
533 hardware prefetch mechanisms to be more effective, and allow
534 larger dma transfers increasing IO efficiency and reducing
535 overhead. However the utilization of memory will increase.
536 For example, each cached file will using a multiple of the
537 page size to hold its contents and the difference between the
538 end of file and the end of page is wasted.
540 Some dedicated systems, such as software raid serving with
541 accelerated calculations, have shown significant increases.
543 If you configure a 64 bit kernel for 64k pages but the
544 processor does not support them, then the kernel will simulate
545 them with 4k pages, loading them on demand, but with the
546 reduced software overhead and larger internal fragmentation.
547 For the 32 bit kernel, a large page option will not be offered
548 unless it is supported by the configured processor.
550 If unsure, choose 4K_PAGES.
556 bool "16k page size" if 44x || PPC_8xx
559 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
560 depends on !PPC_FSL_BOOK3E
561 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
563 config PPC_256K_PAGES
564 bool "256k page size" if 44x
565 depends on !STDBINUTILS
567 Make the page size 256k.
569 As the ELF standard only requires alignment to support page
570 sizes up to 64k, you will need to compile all of your user
571 space applications with a non-standard binutils settings
572 (see the STDBINUTILS description for details).
574 Say N unless you know what you are doing.
578 config FORCE_MAX_ZONEORDER
579 int "Maximum zone order"
580 range 9 64 if PPC64 && PPC_64K_PAGES
581 default "9" if PPC64 && PPC_64K_PAGES
582 range 13 64 if PPC64 && !PPC_64K_PAGES
583 default "13" if PPC64 && !PPC_64K_PAGES
584 range 9 64 if PPC32 && PPC_16K_PAGES
585 default "9" if PPC32 && PPC_16K_PAGES
586 range 7 64 if PPC32 && PPC_64K_PAGES
587 default "7" if PPC32 && PPC_64K_PAGES
588 range 5 64 if PPC32 && PPC_256K_PAGES
589 default "5" if PPC32 && PPC_256K_PAGES
593 The kernel memory allocator divides physically contiguous memory
594 blocks into "zones", where each zone is a power of two number of
595 pages. This option selects the largest power of two that the kernel
596 keeps in the memory allocator. If you need to allocate very large
597 blocks of physically contiguous memory, then you may need to
600 This config option is actually maximum order plus one. For example,
601 a value of 11 means that the largest free memory block is 2^10 pages.
603 The page size is not necessarily 4KB. For example, on 64-bit
604 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
605 this in mind when choosing a value for this option.
607 config PPC_SUBPAGE_PROT
608 bool "Support setting protections for 4k subpages"
609 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
611 This option adds support for a system call to allow user programs
612 to set access permissions (read/write, readonly, or no access)
613 on the 4k subpages of each 64k page.
615 config PPC_COPRO_BASE
620 bool "SMT (Hyperthreading) scheduler support"
621 depends on PPC64 && SMP
623 SMT scheduler support improves the CPU scheduler's decision making
624 when dealing with POWER5 cpus at a cost of slightly increased
625 overhead in some places. If unsure say N here.
627 config PPC_DENORMALISATION
628 bool "PowerPC denormalisation exception handling"
629 depends on PPC_BOOK3S_64
630 default "y" if PPC_POWERNV
632 Add support for handling denormalisation of single precision
633 values. Useful for bare metal only. If unsure say Y here.
636 bool "Default bootloader kernel arguments"
639 string "Initial kernel command string"
640 depends on CMDLINE_BOOL
641 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
643 On some platforms, there is currently no way for the boot loader to
644 pass arguments to the kernel. For these platforms, you can supply
645 some command-line options at build time by entering them here. In
646 most cases you will need to specify the root device here.
649 bool "Always use the default kernel command string"
650 depends on CMDLINE_BOOL
652 Always use the default kernel command string, even if the boot
653 loader passes other arguments to the kernel.
654 This is useful if you cannot or don't want to change the
655 command-line options your boot loader passes to the kernel.
658 string "Additional default image types"
660 List additional targets to be built by the bootwrapper here (separated
661 by spaces). This is useful for targets that depend of device tree
662 files in the .dts directory.
664 Targets in this list will be build as part of the default build
665 target, or when the user does a 'make zImage' or a
666 'make zImage.initrd'.
668 If unsure, leave blank
670 config ARCH_WANTS_FREEZER_CONTROL
674 source kernel/power/Kconfig
677 bool "Enable seccomp to safely compute untrusted bytecode"
681 This kernel feature is useful for number crunching applications
682 that may need to compute untrusted bytecode during their
683 execution. By using pipes or other transports made available to
684 the process as file descriptors supporting the read/write
685 syscalls, it's possible to isolate those applications in
686 their own address space using seccomp. Once seccomp is
687 enabled via /proc/<pid>/seccomp, it cannot be disabled
688 and the task is only allowed to execute a few safe syscalls
689 defined by each seccomp mode.
691 If unsure, say Y. Only embedded should say N here.
702 bool "Support for ISA-bus hardware"
706 Find out whether you have ISA slots on your motherboard. ISA is the
707 name of a bus system, i.e. the way the CPU talks to the other stuff
708 inside your box. If you have an Apple machine, say N here; if you
709 have an IBM RS/6000 or pSeries machine, say Y. If you have an
710 embedded board, consult your board documentation.
716 config NEED_DMA_MAP_STATE
717 def_bool (PPC64 || NOT_COHERENT_CACHE)
719 config NEED_SG_DMA_LENGTH
722 config GENERIC_ISA_DMA
724 depends on ISA_DMA_API
727 config PPC_INDIRECT_PCI
730 default y if 40x || 44x
744 select PPC_INDIRECT_PCI
750 depends on SUSPEND && (PPC_85xx || PPC_86xx)
752 Freescale MPC85xx/MPC86xx power management controller support
753 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
758 depends on SUSPEND && (44x || 40x)
760 PPC4xx Clock Power Management (CPM) support (suspend/resume).
761 It also enables support for two different idle states (idle-wait
768 bool "Freescale Local Bus support"
771 Enables reporting of errors from the Freescale local bus
772 controller. Also contains some common code used by
773 drivers for specific local bus peripherals.
777 depends on PPC_83xx || QUICC_ENGINE || CPM2
779 Freescale General-purpose Timers support
781 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
785 # Platforms that what PCI turned unconditionally just do select PCI
786 # in their config node. Platforms that want to choose at config
787 # time should select PPC_PCI_CHOICE
788 config PPC_PCI_CHOICE
792 bool "PCI support" if PPC_PCI_CHOICE
793 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
794 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
795 default PCI_QSPAN if !4xx && !CPM2 && 8xx
796 select GENERIC_PCI_IOMAP
798 Find out whether your system includes a PCI bus. PCI is the name of
799 a bus system, i.e. the way the CPU talks to the other stuff inside
800 your box. If you say Y here, the kernel will include drivers and
801 infrastructure code to support PCI bus devices.
811 depends on !4xx && !CPM2 && 8xx
814 Say Y here if you have a system based on a Motorola 8xx-series
815 embedded processor with a QSPAN PCI interface, otherwise say N.
819 depends on PCI && 8260
820 select PPC_INDIRECT_PCI
823 source "drivers/pci/pcie/Kconfig"
825 source "drivers/pci/Kconfig"
827 source "drivers/pcmcia/Kconfig"
829 source "drivers/pci/hotplug/Kconfig"
836 tristate "RapidIO support"
837 depends on HAS_RAPIDIO || PCI
839 If you say Y here, the kernel will include drivers and
840 infrastructure code to support RapidIO interconnect devices.
843 bool "Freescale Embedded SRIO Controller support"
844 depends on RAPIDIO = y && HAS_RAPIDIO
847 Include support for RapidIO controller on Freescale embedded
848 processors (MPC8548, MPC8641, etc).
850 source "drivers/rapidio/Kconfig"
854 config NONSTATIC_KERNEL
858 menu "Advanced setup"
861 config ADVANCED_OPTIONS
862 bool "Prompt for advanced kernel configuration options"
864 This option will enable prompting for a variety of advanced kernel
865 configuration options. These options can cause the kernel to not
866 work if they are set incorrectly, but can be used to optimize certain
867 aspects of kernel memory management.
869 Unless you know what you are doing, say N here.
871 comment "Default settings for advanced configuration options are used"
872 depends on !ADVANCED_OPTIONS
874 config LOWMEM_SIZE_BOOL
875 bool "Set maximum low memory"
876 depends on ADVANCED_OPTIONS
878 This option allows you to set the maximum amount of memory which
879 will be used as "low memory", that is, memory which the kernel can
880 access directly, without having to set up a kernel virtual mapping.
881 This can be useful in optimizing the layout of kernel virtual
884 Say N here unless you know what you are doing.
887 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
890 config LOWMEM_CAM_NUM_BOOL
891 bool "Set number of CAMs to use to map low memory"
892 depends on ADVANCED_OPTIONS && FSL_BOOKE
894 This option allows you to set the maximum number of CAM slots that
895 will be used to map low memory. There are a limited number of slots
896 available and even more limited number that will fit in the L1 MMU.
897 However, using more entries will allow mapping more low memory. This
898 can be useful in optimizing the layout of kernel virtual memory.
900 Say N here unless you know what you are doing.
902 config LOWMEM_CAM_NUM
904 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
907 config DYNAMIC_MEMSTART
908 bool "Enable page aligned dynamic load address for kernel"
909 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
910 select NONSTATIC_KERNEL
912 This option enables the kernel to be loaded at any page aligned
913 physical address. The kernel creates a mapping from KERNELBASE to
914 the address where the kernel is loaded. The page size here implies
915 the TLB page size of the mapping for kernel on the particular platform.
916 Please refer to the init code for finding the TLB page size.
918 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
919 kernel image, where the only restriction is the page aligned kernel
920 load address. When this option is enabled, the compile time physical
921 address CONFIG_PHYSICAL_START is ignored.
923 This option is overridden by CONFIG_RELOCATABLE
926 bool "Build a relocatable kernel"
927 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
928 select NONSTATIC_KERNEL
930 This builds a kernel image that is capable of running at the
931 location the kernel is loaded at, without any alignment restrictions.
932 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
934 One use is for the kexec on panic case where the recovery kernel
935 must live at a different physical address than the primary
938 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
939 it has been loaded at and the compile time physical addresses
940 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
941 setting can still be useful to bootwrappers that need to know the
942 load address of the kernel (eg. u-boot/mkimage).
944 config RELOCATABLE_PPC32
946 depends on PPC32 && RELOCATABLE
948 config PAGE_OFFSET_BOOL
949 bool "Set custom page offset address"
950 depends on ADVANCED_OPTIONS
952 This option allows you to set the kernel virtual address at which
953 the kernel will map low memory. This can be useful in optimizing
954 the virtual memory layout of the system.
956 Say N here unless you know what you are doing.
959 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
962 config KERNEL_START_BOOL
963 bool "Set custom kernel base address"
964 depends on ADVANCED_OPTIONS
966 This option allows you to set the kernel virtual address at which
967 the kernel will be loaded. Normally this should match PAGE_OFFSET
968 however there are times (like kdump) that one might not want them
971 Say N here unless you know what you are doing.
974 hex "Virtual address of kernel base" if KERNEL_START_BOOL
975 default PAGE_OFFSET if PAGE_OFFSET_BOOL
976 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
979 config PHYSICAL_START_BOOL
980 bool "Set physical address where the kernel is loaded"
981 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
983 This gives the physical address where the kernel is loaded.
985 Say N here unless you know what you are doing.
987 config PHYSICAL_START
988 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
989 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
992 config PHYSICAL_ALIGN
994 default "0x04000000" if FSL_BOOKE
996 This value puts the alignment restrictions on physical address
997 where kernel is loaded and run from. Kernel is compiled for an
998 address which meets above alignment restriction.
1000 config TASK_SIZE_BOOL
1001 bool "Set custom user task size"
1002 depends on ADVANCED_OPTIONS
1004 This option allows you to set the amount of virtual address space
1005 allocated to user tasks. This can be useful in optimizing the
1006 virtual memory layout of the system.
1008 Say N here unless you know what you are doing.
1011 hex "Size of user task space" if TASK_SIZE_BOOL
1012 default "0x80000000" if PPC_8xx
1013 default "0xc0000000"
1015 config CONSISTENT_SIZE_BOOL
1016 bool "Set custom consistent memory pool size"
1017 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1019 This option allows you to set the size of the
1020 consistent memory pool. This pool of virtual memory
1021 is used to make consistent memory allocations.
1023 config CONSISTENT_SIZE
1024 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1025 default "0x00200000" if NOT_COHERENT_CACHE
1028 bool "Pinned Kernel TLBs (860 ONLY)"
1029 depends on ADVANCED_OPTIONS && 8xx
1034 bool "Build a relocatable kernel"
1035 depends on !COMPILE_TEST
1036 select NONSTATIC_KERNEL
1038 This builds a kernel image that is capable of running anywhere
1039 in the RMA (real memory area) at any 16k-aligned base address.
1040 The kernel is linked as a position-independent executable (PIE)
1041 and contains dynamic relocations which are processed early
1042 in the bootup process.
1044 One use is for the kexec on panic case where the recovery kernel
1045 must live at a different physical address than the primary
1048 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1051 default "0xc000000000000000"
1054 default "0xc000000000000000"
1055 config PHYSICAL_START
1057 default "0x00000000"
1063 source "net/Kconfig"
1065 source "drivers/Kconfig"
1069 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1071 source "lib/Kconfig"
1073 source "arch/powerpc/Kconfig.debug"
1075 source "security/Kconfig"
1079 depends on COMPAT && KEYS
1082 source "crypto/Kconfig"
1084 config PPC_LIB_RHEAP
1087 source "arch/powerpc/kvm/Kconfig"