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
192 config PPC_UDBG_16550
196 config GENERIC_TBSYNC
198 default y if PPC32 && SMP
210 config SYS_SUPPORTS_APM_EMULATION
211 default y if PMAC_APM_EMU
217 Used to allow a board to specify it wants an ePAPR compliant wrapper.
220 config DEFAULT_UIMAGE
223 Used to allow a board to specify it wants a uImage built by default
226 config ARCH_HIBERNATION_POSSIBLE
230 config ARCH_SUSPEND_POSSIBLE
232 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
233 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
236 config PPC_DCR_NATIVE
246 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
249 config PPC_OF_PLATFORM_PCI
252 depends on PPC64 # not supported on 32 bits yet
255 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
256 depends on PPC32 || PPC_STD_MMU_64
259 config ARCH_SUPPORTS_UPROBES
262 config PPC_ADV_DEBUG_REGS
264 depends on 40x || BOOKE
267 config PPC_ADV_DEBUG_IACS
269 depends on PPC_ADV_DEBUG_REGS
273 config PPC_ADV_DEBUG_DACS
275 depends on PPC_ADV_DEBUG_REGS
278 config PPC_ADV_DEBUG_DVCS
280 depends on PPC_ADV_DEBUG_REGS
284 config PPC_ADV_DEBUG_DAC_RANGE
286 depends on PPC_ADV_DEBUG_REGS && 44x
289 config PPC_EMULATE_SSTEP
291 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
297 source "init/Kconfig"
299 source "kernel/Kconfig.freezer"
301 source "arch/powerpc/sysdev/Kconfig"
302 source "arch/powerpc/platforms/Kconfig"
304 menu "Kernel options"
307 bool "High memory support"
310 source kernel/Kconfig.hz
311 source kernel/Kconfig.preempt
312 source "fs/Kconfig.binfmt"
314 config HUGETLB_PAGE_SIZE_VARIABLE
316 depends on HUGETLB_PAGE
319 config MATH_EMULATION
320 bool "Math emulation"
321 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
323 Some PowerPC chips designed for embedded applications do not have
324 a floating-point unit and therefore do not implement the
325 floating-point instructions in the PowerPC instruction set. If you
326 say Y here, the kernel will include code to emulate a floating-point
327 unit, which will allow programs that use floating-point
330 This is also useful to emulate missing (optional) instructions
331 such as fsqrt on cores that do have an FPU but do not implement
332 them (such as Freescale BookE).
335 prompt "Math emulation options"
336 default MATH_EMULATION_FULL
337 depends on MATH_EMULATION
339 config MATH_EMULATION_FULL
340 bool "Emulate all the floating point instructions"
342 Select this option will enable the kernel to support to emulate
343 all the floating point instructions. If your SoC doesn't have
344 a FPU, you should select this.
346 config MATH_EMULATION_HW_UNIMPLEMENTED
347 bool "Just emulate the FPU unimplemented instructions"
349 Select this if you know there does have a hardware FPU on your
350 SoC, but some floating point instructions are not implemented by that.
354 config PPC_TRANSACTIONAL_MEM
355 bool "Transactional Memory support for POWERPC"
356 depends on PPC_BOOK3S_64
362 Support user-mode Transactional Memory on POWERPC.
368 bool "SWIOTLB support"
372 Support for IO bounce buffering for systems without an IOMMU.
373 This allows us to DMA to the full physical address space on
374 platforms where the size of a physical address is larger
375 than the bus address. Not all platforms support this.
378 bool "Support for enabling/disabling CPUs"
379 depends on SMP && (PPC_PSERIES || \
380 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
382 Say Y here to be able to disable and re-enable individual
383 CPUs at runtime on SMP machines.
385 Say N if you are unsure.
387 config ARCH_CPU_PROBE_RELEASE
389 depends on HOTPLUG_CPU
391 config ARCH_ENABLE_MEMORY_HOTPLUG
394 config ARCH_HAS_WALK_MEMORY
397 config ARCH_ENABLE_MEMORY_HOTREMOVE
400 config PPC64_SUPPORTS_MEMORY_FAILURE
401 bool "Add support for memory hwpoison"
402 depends on PPC_BOOK3S_64
403 default "y" if PPC_POWERNV
404 select ARCH_SUPPORTS_MEMORY_FAILURE
407 bool "kexec system call"
408 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
410 kexec is a system call that implements the ability to shutdown your
411 current kernel, and to start another kernel. It is like a reboot
412 but it is independent of the system firmware. And like a reboot
413 you can start any kernel with it, not just Linux.
415 The name comes from the similarity to the exec system call.
417 It is an ongoing process to be certain the hardware in a machine
418 is properly shutdown, so do not be surprised if this code does not
419 initially work for you. As of this writing the exact hardware
420 interface is strongly in flux, so no good recommendation can be
424 bool "Build a kdump crash kernel"
425 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
426 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
428 Build a kernel suitable for use as a kdump capture kernel.
429 The same kernel binary can be used as production kernel and dump
433 bool "Firmware-assisted dump"
434 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
436 A robust mechanism to get reliable kernel crash dump with
437 assistance from firmware. This approach does not use kexec,
438 instead firmware assists in booting the kdump kernel
439 while preserving memory contents. Firmware-assisted dump
440 is meant to be a kdump replacement offering robustness and
441 speed not possible without system firmware assistance.
446 bool "Distribute interrupts on all CPUs by default"
449 This option gives the kernel permission to distribute IRQs across
450 multiple CPUs. Saying N here will route all IRQs to the first
451 CPU. Generally saying Y is safe, although some problems have been
452 reported with SMP Power Macintoshes with this option enabled.
457 default y if SMP && PPC_PSERIES
463 depends on NEED_MULTIPLE_NODES
465 config USE_PERCPU_NUMA_NODE_ID
469 config HAVE_MEMORYLESS_NODES
473 config ARCH_SELECT_MEMORY_MODEL
477 config ARCH_FLATMEM_ENABLE
479 depends on (PPC64 && !NUMA) || PPC32
481 config ARCH_SPARSEMEM_ENABLE
484 select SPARSEMEM_VMEMMAP_ENABLE
486 config ARCH_SPARSEMEM_DEFAULT
488 depends on (SMP && PPC_PSERIES) || PPC_PS3
490 config SYS_SUPPORTS_HUGETLBFS
495 config ARCH_MEMORY_PROBE
497 depends on MEMORY_HOTPLUG
499 # Some NUMA nodes have memory ranges that span
500 # other nodes. Even though a pfn is valid and
501 # between a node's start and end pfns, it may not
502 # reside on that node. See memmap_init_zone()
504 config NODES_SPAN_OTHER_NODES
506 depends on NEED_MULTIPLE_NODES
508 config PPC_HAS_HASH_64K
514 bool "Using standard binutils settings"
518 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
519 Note, that kernel will be able to run only those applications,
520 which had been compiled using binutils later than 2.17.50.0.3 with
521 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
522 the older binutils, you can patch them with a trivial patch, which
523 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
529 Select the kernel logical page size. Increasing the page size
530 will reduce software overhead at each page boundary, allow
531 hardware prefetch mechanisms to be more effective, and allow
532 larger dma transfers increasing IO efficiency and reducing
533 overhead. However the utilization of memory will increase.
534 For example, each cached file will using a multiple of the
535 page size to hold its contents and the difference between the
536 end of file and the end of page is wasted.
538 Some dedicated systems, such as software raid serving with
539 accelerated calculations, have shown significant increases.
541 If you configure a 64 bit kernel for 64k pages but the
542 processor does not support them, then the kernel will simulate
543 them with 4k pages, loading them on demand, but with the
544 reduced software overhead and larger internal fragmentation.
545 For the 32 bit kernel, a large page option will not be offered
546 unless it is supported by the configured processor.
548 If unsure, choose 4K_PAGES.
554 bool "16k page size" if 44x || PPC_8xx
557 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
558 depends on !PPC_FSL_BOOK3E
559 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
561 config PPC_256K_PAGES
562 bool "256k page size" if 44x
563 depends on !STDBINUTILS
565 Make the page size 256k.
567 As the ELF standard only requires alignment to support page
568 sizes up to 64k, you will need to compile all of your user
569 space applications with a non-standard binutils settings
570 (see the STDBINUTILS description for details).
572 Say N unless you know what you are doing.
576 config FORCE_MAX_ZONEORDER
577 int "Maximum zone order"
578 range 9 64 if PPC64 && PPC_64K_PAGES
579 default "9" if PPC64 && PPC_64K_PAGES
580 range 13 64 if PPC64 && !PPC_64K_PAGES
581 default "13" if PPC64 && !PPC_64K_PAGES
582 range 9 64 if PPC32 && PPC_16K_PAGES
583 default "9" if PPC32 && PPC_16K_PAGES
584 range 7 64 if PPC32 && PPC_64K_PAGES
585 default "7" if PPC32 && PPC_64K_PAGES
586 range 5 64 if PPC32 && PPC_256K_PAGES
587 default "5" if PPC32 && PPC_256K_PAGES
591 The kernel memory allocator divides physically contiguous memory
592 blocks into "zones", where each zone is a power of two number of
593 pages. This option selects the largest power of two that the kernel
594 keeps in the memory allocator. If you need to allocate very large
595 blocks of physically contiguous memory, then you may need to
598 This config option is actually maximum order plus one. For example,
599 a value of 11 means that the largest free memory block is 2^10 pages.
601 The page size is not necessarily 4KB. For example, on 64-bit
602 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
603 this in mind when choosing a value for this option.
605 config PPC_SUBPAGE_PROT
606 bool "Support setting protections for 4k subpages"
607 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
609 This option adds support for a system call to allow user programs
610 to set access permissions (read/write, readonly, or no access)
611 on the 4k subpages of each 64k page.
613 config PPC_COPRO_BASE
618 bool "SMT (Hyperthreading) scheduler support"
619 depends on PPC64 && SMP
621 SMT scheduler support improves the CPU scheduler's decision making
622 when dealing with POWER5 cpus at a cost of slightly increased
623 overhead in some places. If unsure say N here.
625 config PPC_DENORMALISATION
626 bool "PowerPC denormalisation exception handling"
627 depends on PPC_BOOK3S_64
628 default "y" if PPC_POWERNV
630 Add support for handling denormalisation of single precision
631 values. Useful for bare metal only. If unsure say Y here.
634 bool "Default bootloader kernel arguments"
637 string "Initial kernel command string"
638 depends on CMDLINE_BOOL
639 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
641 On some platforms, there is currently no way for the boot loader to
642 pass arguments to the kernel. For these platforms, you can supply
643 some command-line options at build time by entering them here. In
644 most cases you will need to specify the root device here.
647 bool "Always use the default kernel command string"
648 depends on CMDLINE_BOOL
650 Always use the default kernel command string, even if the boot
651 loader passes other arguments to the kernel.
652 This is useful if you cannot or don't want to change the
653 command-line options your boot loader passes to the kernel.
656 string "Additional default image types"
658 List additional targets to be built by the bootwrapper here (separated
659 by spaces). This is useful for targets that depend of device tree
660 files in the .dts directory.
662 Targets in this list will be build as part of the default build
663 target, or when the user does a 'make zImage' or a
664 'make zImage.initrd'.
666 If unsure, leave blank
668 config ARCH_WANTS_FREEZER_CONTROL
672 source kernel/power/Kconfig
675 bool "Enable seccomp to safely compute untrusted bytecode"
679 This kernel feature is useful for number crunching applications
680 that may need to compute untrusted bytecode during their
681 execution. By using pipes or other transports made available to
682 the process as file descriptors supporting the read/write
683 syscalls, it's possible to isolate those applications in
684 their own address space using seccomp. Once seccomp is
685 enabled via /proc/<pid>/seccomp, it cannot be disabled
686 and the task is only allowed to execute a few safe syscalls
687 defined by each seccomp mode.
689 If unsure, say Y. Only embedded should say N here.
700 bool "Support for ISA-bus hardware"
704 Find out whether you have ISA slots on your motherboard. ISA is the
705 name of a bus system, i.e. the way the CPU talks to the other stuff
706 inside your box. If you have an Apple machine, say N here; if you
707 have an IBM RS/6000 or pSeries machine, say Y. If you have an
708 embedded board, consult your board documentation.
714 config NEED_DMA_MAP_STATE
715 def_bool (PPC64 || NOT_COHERENT_CACHE)
717 config NEED_SG_DMA_LENGTH
720 config GENERIC_ISA_DMA
722 depends on ISA_DMA_API
725 config PPC_INDIRECT_PCI
728 default y if 40x || 44x
742 select PPC_INDIRECT_PCI
748 depends on SUSPEND && (PPC_85xx || PPC_86xx)
750 Freescale MPC85xx/MPC86xx power management controller support
751 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
756 depends on SUSPEND && (44x || 40x)
758 PPC4xx Clock Power Management (CPM) support (suspend/resume).
759 It also enables support for two different idle states (idle-wait
766 bool "Freescale Local Bus support"
769 Enables reporting of errors from the Freescale local bus
770 controller. Also contains some common code used by
771 drivers for specific local bus peripherals.
775 depends on PPC_83xx || QUICC_ENGINE || CPM2
777 Freescale General-purpose Timers support
779 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
783 # Platforms that what PCI turned unconditionally just do select PCI
784 # in their config node. Platforms that want to choose at config
785 # time should select PPC_PCI_CHOICE
786 config PPC_PCI_CHOICE
790 bool "PCI support" if PPC_PCI_CHOICE
791 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
792 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
793 default PCI_QSPAN if !4xx && !CPM2 && 8xx
794 select GENERIC_PCI_IOMAP
796 Find out whether your system includes a PCI bus. PCI is the name of
797 a bus system, i.e. the way the CPU talks to the other stuff inside
798 your box. If you say Y here, the kernel will include drivers and
799 infrastructure code to support PCI bus devices.
809 depends on !4xx && !CPM2 && 8xx
812 Say Y here if you have a system based on a Motorola 8xx-series
813 embedded processor with a QSPAN PCI interface, otherwise say N.
817 depends on PCI && 8260
818 select PPC_INDIRECT_PCI
821 source "drivers/pci/pcie/Kconfig"
823 source "drivers/pci/Kconfig"
825 source "drivers/pcmcia/Kconfig"
827 source "drivers/pci/hotplug/Kconfig"
834 tristate "RapidIO support"
835 depends on HAS_RAPIDIO || PCI
837 If you say Y here, the kernel will include drivers and
838 infrastructure code to support RapidIO interconnect devices.
841 bool "Freescale Embedded SRIO Controller support"
842 depends on RAPIDIO = y && HAS_RAPIDIO
845 Include support for RapidIO controller on Freescale embedded
846 processors (MPC8548, MPC8641, etc).
848 source "drivers/rapidio/Kconfig"
852 config NONSTATIC_KERNEL
856 menu "Advanced setup"
859 config ADVANCED_OPTIONS
860 bool "Prompt for advanced kernel configuration options"
862 This option will enable prompting for a variety of advanced kernel
863 configuration options. These options can cause the kernel to not
864 work if they are set incorrectly, but can be used to optimize certain
865 aspects of kernel memory management.
867 Unless you know what you are doing, say N here.
869 comment "Default settings for advanced configuration options are used"
870 depends on !ADVANCED_OPTIONS
872 config LOWMEM_SIZE_BOOL
873 bool "Set maximum low memory"
874 depends on ADVANCED_OPTIONS
876 This option allows you to set the maximum amount of memory which
877 will be used as "low memory", that is, memory which the kernel can
878 access directly, without having to set up a kernel virtual mapping.
879 This can be useful in optimizing the layout of kernel virtual
882 Say N here unless you know what you are doing.
885 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
888 config LOWMEM_CAM_NUM_BOOL
889 bool "Set number of CAMs to use to map low memory"
890 depends on ADVANCED_OPTIONS && FSL_BOOKE
892 This option allows you to set the maximum number of CAM slots that
893 will be used to map low memory. There are a limited number of slots
894 available and even more limited number that will fit in the L1 MMU.
895 However, using more entries will allow mapping more low memory. This
896 can be useful in optimizing the layout of kernel virtual memory.
898 Say N here unless you know what you are doing.
900 config LOWMEM_CAM_NUM
902 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
905 config DYNAMIC_MEMSTART
906 bool "Enable page aligned dynamic load address for kernel"
907 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
908 select NONSTATIC_KERNEL
910 This option enables the kernel to be loaded at any page aligned
911 physical address. The kernel creates a mapping from KERNELBASE to
912 the address where the kernel is loaded. The page size here implies
913 the TLB page size of the mapping for kernel on the particular platform.
914 Please refer to the init code for finding the TLB page size.
916 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
917 kernel image, where the only restriction is the page aligned kernel
918 load address. When this option is enabled, the compile time physical
919 address CONFIG_PHYSICAL_START is ignored.
921 This option is overridden by CONFIG_RELOCATABLE
924 bool "Build a relocatable kernel"
925 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
926 select NONSTATIC_KERNEL
928 This builds a kernel image that is capable of running at the
929 location the kernel is loaded at, without any alignment restrictions.
930 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
932 One use is for the kexec on panic case where the recovery kernel
933 must live at a different physical address than the primary
936 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
937 it has been loaded at and the compile time physical addresses
938 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
939 setting can still be useful to bootwrappers that need to know the
940 load address of the kernel (eg. u-boot/mkimage).
942 config RELOCATABLE_PPC32
944 depends on PPC32 && RELOCATABLE
946 config PAGE_OFFSET_BOOL
947 bool "Set custom page offset address"
948 depends on ADVANCED_OPTIONS
950 This option allows you to set the kernel virtual address at which
951 the kernel will map low memory. This can be useful in optimizing
952 the virtual memory layout of the system.
954 Say N here unless you know what you are doing.
957 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
960 config KERNEL_START_BOOL
961 bool "Set custom kernel base address"
962 depends on ADVANCED_OPTIONS
964 This option allows you to set the kernel virtual address at which
965 the kernel will be loaded. Normally this should match PAGE_OFFSET
966 however there are times (like kdump) that one might not want them
969 Say N here unless you know what you are doing.
972 hex "Virtual address of kernel base" if KERNEL_START_BOOL
973 default PAGE_OFFSET if PAGE_OFFSET_BOOL
974 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
977 config PHYSICAL_START_BOOL
978 bool "Set physical address where the kernel is loaded"
979 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
981 This gives the physical address where the kernel is loaded.
983 Say N here unless you know what you are doing.
985 config PHYSICAL_START
986 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
987 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
990 config PHYSICAL_ALIGN
992 default "0x04000000" if FSL_BOOKE
994 This value puts the alignment restrictions on physical address
995 where kernel is loaded and run from. Kernel is compiled for an
996 address which meets above alignment restriction.
998 config TASK_SIZE_BOOL
999 bool "Set custom user task size"
1000 depends on ADVANCED_OPTIONS
1002 This option allows you to set the amount of virtual address space
1003 allocated to user tasks. This can be useful in optimizing the
1004 virtual memory layout of the system.
1006 Say N here unless you know what you are doing.
1009 hex "Size of user task space" if TASK_SIZE_BOOL
1010 default "0x80000000" if PPC_8xx
1011 default "0xc0000000"
1013 config CONSISTENT_SIZE_BOOL
1014 bool "Set custom consistent memory pool size"
1015 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1017 This option allows you to set the size of the
1018 consistent memory pool. This pool of virtual memory
1019 is used to make consistent memory allocations.
1021 config CONSISTENT_SIZE
1022 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1023 default "0x00200000" if NOT_COHERENT_CACHE
1026 bool "Pinned Kernel TLBs (860 ONLY)"
1027 depends on ADVANCED_OPTIONS && 8xx
1032 bool "Build a relocatable kernel"
1033 depends on !COMPILE_TEST
1034 select NONSTATIC_KERNEL
1036 This builds a kernel image that is capable of running anywhere
1037 in the RMA (real memory area) at any 16k-aligned base address.
1038 The kernel is linked as a position-independent executable (PIE)
1039 and contains dynamic relocations which are processed early
1040 in the bootup process.
1042 One use is for the kexec on panic case where the recovery kernel
1043 must live at a different physical address than the primary
1046 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1049 default "0xc000000000000000"
1052 default "0xc000000000000000"
1053 config PHYSICAL_START
1055 default "0x00000000"
1061 source "net/Kconfig"
1063 source "drivers/Kconfig"
1067 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1069 source "lib/Kconfig"
1071 source "arch/powerpc/Kconfig.debug"
1073 source "security/Kconfig"
1077 depends on COMPAT && KEYS
1080 source "crypto/Kconfig"
1082 config PPC_LIB_RHEAP
1085 source "arch/powerpc/kvm/Kconfig"