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_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_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
129 select HAVE_ARCH_JUMP_LABEL
130 select ARCH_HAVE_NMI_SAFE_CMPXCHG
131 select ARCH_HAS_GCOV_PROFILE_ALL
132 select GENERIC_SMP_IDLE_THREAD
133 select GENERIC_CMOS_UPDATE
134 select GENERIC_TIME_VSYSCALL_OLD
135 select GENERIC_CLOCKEVENTS
136 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
137 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
138 select GENERIC_STRNCPY_FROM_USER
139 select GENERIC_STRNLEN_USER
140 select HAVE_MOD_ARCH_SPECIFIC
141 select MODULES_USE_ELF_RELA
142 select CLONE_BACKWARDS
143 select ARCH_USE_BUILTIN_BSWAP
144 select OLD_SIGSUSPEND
145 select OLD_SIGACTION if PPC32
146 select HAVE_DEBUG_STACKOVERFLOW
147 select HAVE_IRQ_EXIT_ON_IRQ_STACK
148 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
149 select HAVE_ARCH_AUDITSYSCALL
150 select ARCH_SUPPORTS_ATOMIC_RMW
151 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
153 select HAVE_GENERIC_RCU_GUP
154 select HAVE_PERF_EVENTS_NMI if PPC64
155 select HAVE_NMI if PERF_EVENTS
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
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.
381 bool "SWIOTLB support"
385 Support for IO bounce buffering for systems without an IOMMU.
386 This allows us to DMA to the full physical address space on
387 platforms where the size of a physical address is larger
388 than the bus address. Not all platforms support this.
391 bool "Support for enabling/disabling CPUs"
392 depends on SMP && (PPC_PSERIES || \
393 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
395 Say Y here to be able to disable and re-enable individual
396 CPUs at runtime on SMP machines.
398 Say N if you are unsure.
400 config ARCH_CPU_PROBE_RELEASE
402 depends on HOTPLUG_CPU
404 config ARCH_ENABLE_MEMORY_HOTPLUG
407 config ARCH_HAS_WALK_MEMORY
410 config ARCH_ENABLE_MEMORY_HOTREMOVE
413 config PPC64_SUPPORTS_MEMORY_FAILURE
414 bool "Add support for memory hwpoison"
415 depends on PPC_BOOK3S_64
416 default "y" if PPC_POWERNV
417 select ARCH_SUPPORTS_MEMORY_FAILURE
420 bool "kexec system call"
421 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
424 kexec is a system call that implements the ability to shutdown your
425 current kernel, and to start another kernel. It is like a reboot
426 but it is independent of the system firmware. And like a reboot
427 you can start any kernel with it, not just Linux.
429 The name comes from the similarity to the exec system call.
431 It is an ongoing process to be certain the hardware in a machine
432 is properly shutdown, so do not be surprised if this code does not
433 initially work for you. As of this writing the exact hardware
434 interface is strongly in flux, so no good recommendation can be
438 bool "Build a kdump crash kernel"
439 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
440 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
442 Build a kernel suitable for use as a kdump capture kernel.
443 The same kernel binary can be used as production kernel and dump
447 bool "Firmware-assisted dump"
448 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
450 A robust mechanism to get reliable kernel crash dump with
451 assistance from firmware. This approach does not use kexec,
452 instead firmware assists in booting the kdump kernel
453 while preserving memory contents. Firmware-assisted dump
454 is meant to be a kdump replacement offering robustness and
455 speed not possible without system firmware assistance.
460 bool "Distribute interrupts on all CPUs by default"
463 This option gives the kernel permission to distribute IRQs across
464 multiple CPUs. Saying N here will route all IRQs to the first
465 CPU. Generally saying Y is safe, although some problems have been
466 reported with SMP Power Macintoshes with this option enabled.
471 default y if SMP && PPC_PSERIES
477 depends on NEED_MULTIPLE_NODES
479 config USE_PERCPU_NUMA_NODE_ID
483 config HAVE_MEMORYLESS_NODES
487 config ARCH_SELECT_MEMORY_MODEL
491 config ARCH_FLATMEM_ENABLE
493 depends on (PPC64 && !NUMA) || PPC32
495 config ARCH_SPARSEMEM_ENABLE
498 select SPARSEMEM_VMEMMAP_ENABLE
500 config ARCH_SPARSEMEM_DEFAULT
502 depends on (SMP && PPC_PSERIES) || PPC_PS3
504 config SYS_SUPPORTS_HUGETLBFS
509 config ARCH_MEMORY_PROBE
511 depends on MEMORY_HOTPLUG
513 # Some NUMA nodes have memory ranges that span
514 # other nodes. Even though a pfn is valid and
515 # between a node's start and end pfns, it may not
516 # reside on that node. See memmap_init_zone()
518 config NODES_SPAN_OTHER_NODES
520 depends on NEED_MULTIPLE_NODES
523 bool "Using standard binutils settings"
527 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
528 Note, that kernel will be able to run only those applications,
529 which had been compiled using binutils later than 2.17.50.0.3 with
530 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
531 the older binutils, you can patch them with a trivial patch, which
532 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
538 Select the kernel logical page size. Increasing the page size
539 will reduce software overhead at each page boundary, allow
540 hardware prefetch mechanisms to be more effective, and allow
541 larger dma transfers increasing IO efficiency and reducing
542 overhead. However the utilization of memory will increase.
543 For example, each cached file will using a multiple of the
544 page size to hold its contents and the difference between the
545 end of file and the end of page is wasted.
547 Some dedicated systems, such as software raid serving with
548 accelerated calculations, have shown significant increases.
550 If you configure a 64 bit kernel for 64k pages but the
551 processor does not support them, then the kernel will simulate
552 them with 4k pages, loading them on demand, but with the
553 reduced software overhead and larger internal fragmentation.
554 For the 32 bit kernel, a large page option will not be offered
555 unless it is supported by the configured processor.
557 If unsure, choose 4K_PAGES.
561 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
565 depends on 44x || PPC_8xx
569 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
570 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
572 config PPC_256K_PAGES
573 bool "256k page size"
574 depends on 44x && !STDBINUTILS
576 Make the page size 256k.
578 As the ELF standard only requires alignment to support page
579 sizes up to 64k, you will need to compile all of your user
580 space applications with a non-standard binutils settings
581 (see the STDBINUTILS description for details).
583 Say N unless you know what you are doing.
587 config FORCE_MAX_ZONEORDER
588 int "Maximum zone order"
589 range 9 64 if PPC64 && PPC_64K_PAGES
590 default "9" if PPC64 && PPC_64K_PAGES
591 range 13 64 if PPC64 && !PPC_64K_PAGES
592 default "13" if PPC64 && !PPC_64K_PAGES
593 range 9 64 if PPC32 && PPC_16K_PAGES
594 default "9" if PPC32 && PPC_16K_PAGES
595 range 7 64 if PPC32 && PPC_64K_PAGES
596 default "7" if PPC32 && PPC_64K_PAGES
597 range 5 64 if PPC32 && PPC_256K_PAGES
598 default "5" if PPC32 && PPC_256K_PAGES
602 The kernel memory allocator divides physically contiguous memory
603 blocks into "zones", where each zone is a power of two number of
604 pages. This option selects the largest power of two that the kernel
605 keeps in the memory allocator. If you need to allocate very large
606 blocks of physically contiguous memory, then you may need to
609 This config option is actually maximum order plus one. For example,
610 a value of 11 means that the largest free memory block is 2^10 pages.
612 The page size is not necessarily 4KB. For example, on 64-bit
613 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
614 this in mind when choosing a value for this option.
616 config PPC_SUBPAGE_PROT
617 bool "Support setting protections for 4k subpages"
618 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
620 This option adds support for a system call to allow user programs
621 to set access permissions (read/write, readonly, or no access)
622 on the 4k subpages of each 64k page.
624 config PPC_COPRO_BASE
629 bool "SMT (Hyperthreading) scheduler support"
630 depends on PPC64 && SMP
632 SMT scheduler support improves the CPU scheduler's decision making
633 when dealing with POWER5 cpus at a cost of slightly increased
634 overhead in some places. If unsure say N here.
636 config PPC_DENORMALISATION
637 bool "PowerPC denormalisation exception handling"
638 depends on PPC_BOOK3S_64
639 default "y" if PPC_POWERNV
641 Add support for handling denormalisation of single precision
642 values. Useful for bare metal only. If unsure say Y here.
645 bool "Default bootloader kernel arguments"
648 string "Initial kernel command string"
649 depends on CMDLINE_BOOL
650 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
652 On some platforms, there is currently no way for the boot loader to
653 pass arguments to the kernel. For these platforms, you can supply
654 some command-line options at build time by entering them here. In
655 most cases you will need to specify the root device here.
658 bool "Always use the default kernel command string"
659 depends on CMDLINE_BOOL
661 Always use the default kernel command string, even if the boot
662 loader passes other arguments to the kernel.
663 This is useful if you cannot or don't want to change the
664 command-line options your boot loader passes to the kernel.
667 string "Additional default image types"
669 List additional targets to be built by the bootwrapper here (separated
670 by spaces). This is useful for targets that depend of device tree
671 files in the .dts directory.
673 Targets in this list will be build as part of the default build
674 target, or when the user does a 'make zImage' or a
675 'make zImage.initrd'.
677 If unsure, leave blank
679 config ARCH_WANTS_FREEZER_CONTROL
683 source kernel/power/Kconfig
686 bool "Enable seccomp to safely compute untrusted bytecode"
690 This kernel feature is useful for number crunching applications
691 that may need to compute untrusted bytecode during their
692 execution. By using pipes or other transports made available to
693 the process as file descriptors supporting the read/write
694 syscalls, it's possible to isolate those applications in
695 their own address space using seccomp. Once seccomp is
696 enabled via /proc/<pid>/seccomp, it cannot be disabled
697 and the task is only allowed to execute a few safe syscalls
698 defined by each seccomp mode.
700 If unsure, say Y. Only embedded should say N here.
711 bool "Support for ISA-bus hardware"
715 Find out whether you have ISA slots on your motherboard. ISA is the
716 name of a bus system, i.e. the way the CPU talks to the other stuff
717 inside your box. If you have an Apple machine, say N here; if you
718 have an IBM RS/6000 or pSeries machine, say Y. If you have an
719 embedded board, consult your board documentation.
725 config NEED_DMA_MAP_STATE
726 def_bool (PPC64 || NOT_COHERENT_CACHE)
728 config NEED_SG_DMA_LENGTH
731 config GENERIC_ISA_DMA
733 depends on ISA_DMA_API
736 config PPC_INDIRECT_PCI
739 default y if 40x || 44x
753 select PPC_INDIRECT_PCI
759 depends on SUSPEND && (PPC_85xx || PPC_86xx)
761 Freescale MPC85xx/MPC86xx power management controller support
762 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
767 depends on SUSPEND && (44x || 40x)
769 PPC4xx Clock Power Management (CPM) support (suspend/resume).
770 It also enables support for two different idle states (idle-wait
777 bool "Freescale Local Bus support"
780 Enables reporting of errors from the Freescale local bus
781 controller. Also contains some common code used by
782 drivers for specific local bus peripherals.
786 depends on PPC_83xx || QUICC_ENGINE || CPM2
788 Freescale General-purpose Timers support
790 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
794 # Platforms that what PCI turned unconditionally just do select PCI
795 # in their config node. Platforms that want to choose at config
796 # time should select PPC_PCI_CHOICE
797 config PPC_PCI_CHOICE
801 bool "PCI support" if PPC_PCI_CHOICE
802 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
803 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
804 default PCI_QSPAN if !4xx && !CPM2 && 8xx
805 select GENERIC_PCI_IOMAP
807 Find out whether your system includes a PCI bus. PCI is the name of
808 a bus system, i.e. the way the CPU talks to the other stuff inside
809 your box. If you say Y here, the kernel will include drivers and
810 infrastructure code to support PCI bus devices.
820 depends on !4xx && !CPM2 && 8xx
823 Say Y here if you have a system based on a Motorola 8xx-series
824 embedded processor with a QSPAN PCI interface, otherwise say N.
828 depends on PCI && 8260
829 select PPC_INDIRECT_PCI
832 source "drivers/pci/pcie/Kconfig"
834 source "drivers/pci/Kconfig"
836 source "drivers/pcmcia/Kconfig"
838 source "drivers/pci/hotplug/Kconfig"
845 tristate "RapidIO support"
846 depends on HAS_RAPIDIO || PCI
848 If you say Y here, the kernel will include drivers and
849 infrastructure code to support RapidIO interconnect devices.
852 bool "Freescale Embedded SRIO Controller support"
853 depends on RAPIDIO = y && HAS_RAPIDIO
856 Include support for RapidIO controller on Freescale embedded
857 processors (MPC8548, MPC8641, etc).
859 source "drivers/rapidio/Kconfig"
863 config NONSTATIC_KERNEL
867 menu "Advanced setup"
870 config ADVANCED_OPTIONS
871 bool "Prompt for advanced kernel configuration options"
873 This option will enable prompting for a variety of advanced kernel
874 configuration options. These options can cause the kernel to not
875 work if they are set incorrectly, but can be used to optimize certain
876 aspects of kernel memory management.
878 Unless you know what you are doing, say N here.
880 comment "Default settings for advanced configuration options are used"
881 depends on !ADVANCED_OPTIONS
883 config LOWMEM_SIZE_BOOL
884 bool "Set maximum low memory"
885 depends on ADVANCED_OPTIONS
887 This option allows you to set the maximum amount of memory which
888 will be used as "low memory", that is, memory which the kernel can
889 access directly, without having to set up a kernel virtual mapping.
890 This can be useful in optimizing the layout of kernel virtual
893 Say N here unless you know what you are doing.
896 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
899 config LOWMEM_CAM_NUM_BOOL
900 bool "Set number of CAMs to use to map low memory"
901 depends on ADVANCED_OPTIONS && FSL_BOOKE
903 This option allows you to set the maximum number of CAM slots that
904 will be used to map low memory. There are a limited number of slots
905 available and even more limited number that will fit in the L1 MMU.
906 However, using more entries will allow mapping more low memory. This
907 can be useful in optimizing the layout of kernel virtual memory.
909 Say N here unless you know what you are doing.
911 config LOWMEM_CAM_NUM
913 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
916 config DYNAMIC_MEMSTART
917 bool "Enable page aligned dynamic load address for kernel"
918 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
919 select NONSTATIC_KERNEL
921 This option enables the kernel to be loaded at any page aligned
922 physical address. The kernel creates a mapping from KERNELBASE to
923 the address where the kernel is loaded. The page size here implies
924 the TLB page size of the mapping for kernel on the particular platform.
925 Please refer to the init code for finding the TLB page size.
927 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
928 kernel image, where the only restriction is the page aligned kernel
929 load address. When this option is enabled, the compile time physical
930 address CONFIG_PHYSICAL_START is ignored.
932 This option is overridden by CONFIG_RELOCATABLE
935 bool "Build a relocatable kernel"
936 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
937 select NONSTATIC_KERNEL
939 This builds a kernel image that is capable of running at the
940 location the kernel is loaded at, without any alignment restrictions.
941 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
943 One use is for the kexec on panic case where the recovery kernel
944 must live at a different physical address than the primary
947 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
948 it has been loaded at and the compile time physical addresses
949 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
950 setting can still be useful to bootwrappers that need to know the
951 load address of the kernel (eg. u-boot/mkimage).
953 config RELOCATABLE_PPC32
955 depends on PPC32 && RELOCATABLE
957 config PAGE_OFFSET_BOOL
958 bool "Set custom page offset address"
959 depends on ADVANCED_OPTIONS
961 This option allows you to set the kernel virtual address at which
962 the kernel will map low memory. This can be useful in optimizing
963 the virtual memory layout of the system.
965 Say N here unless you know what you are doing.
968 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
971 config KERNEL_START_BOOL
972 bool "Set custom kernel base address"
973 depends on ADVANCED_OPTIONS
975 This option allows you to set the kernel virtual address at which
976 the kernel will be loaded. Normally this should match PAGE_OFFSET
977 however there are times (like kdump) that one might not want them
980 Say N here unless you know what you are doing.
983 hex "Virtual address of kernel base" if KERNEL_START_BOOL
984 default PAGE_OFFSET if PAGE_OFFSET_BOOL
985 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
988 config PHYSICAL_START_BOOL
989 bool "Set physical address where the kernel is loaded"
990 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
992 This gives the physical address where the kernel is loaded.
994 Say N here unless you know what you are doing.
996 config PHYSICAL_START
997 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
998 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1001 config PHYSICAL_ALIGN
1003 default "0x04000000" if FSL_BOOKE
1005 This value puts the alignment restrictions on physical address
1006 where kernel is loaded and run from. Kernel is compiled for an
1007 address which meets above alignment restriction.
1009 config TASK_SIZE_BOOL
1010 bool "Set custom user task size"
1011 depends on ADVANCED_OPTIONS
1013 This option allows you to set the amount of virtual address space
1014 allocated to user tasks. This can be useful in optimizing the
1015 virtual memory layout of the system.
1017 Say N here unless you know what you are doing.
1020 hex "Size of user task space" if TASK_SIZE_BOOL
1021 default "0x80000000" if PPC_8xx
1022 default "0xc0000000"
1024 config CONSISTENT_SIZE_BOOL
1025 bool "Set custom consistent memory pool size"
1026 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1028 This option allows you to set the size of the
1029 consistent memory pool. This pool of virtual memory
1030 is used to make consistent memory allocations.
1032 config CONSISTENT_SIZE
1033 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1034 default "0x00200000" if NOT_COHERENT_CACHE
1037 bool "Pinned Kernel TLBs (860 ONLY)"
1038 depends on ADVANCED_OPTIONS && 8xx
1043 bool "Build a relocatable kernel"
1044 depends on !COMPILE_TEST
1045 select NONSTATIC_KERNEL
1047 This builds a kernel image that is capable of running anywhere
1048 in the RMA (real memory area) at any 16k-aligned base address.
1049 The kernel is linked as a position-independent executable (PIE)
1050 and contains dynamic relocations which are processed early
1051 in the bootup process.
1053 One use is for the kexec on panic case where the recovery kernel
1054 must live at a different physical address than the primary
1057 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1060 default "0xc000000000000000"
1063 default "0xc000000000000000"
1064 config PHYSICAL_START
1066 default "0x00000000"
1072 source "net/Kconfig"
1074 source "drivers/Kconfig"
1078 source "lib/Kconfig"
1080 source "arch/powerpc/Kconfig.debug"
1082 source "security/Kconfig"
1086 depends on COMPAT && KEYS
1089 source "crypto/Kconfig"
1091 config PPC_LIB_RHEAP
1094 source "arch/powerpc/kvm/Kconfig"