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
259 depends on PPC32 || PPC_STD_MMU_64
262 config ARCH_SUPPORTS_UPROBES
265 config PPC_ADV_DEBUG_REGS
267 depends on 40x || BOOKE
270 config PPC_ADV_DEBUG_IACS
272 depends on PPC_ADV_DEBUG_REGS
276 config PPC_ADV_DEBUG_DACS
278 depends on PPC_ADV_DEBUG_REGS
281 config PPC_ADV_DEBUG_DVCS
283 depends on PPC_ADV_DEBUG_REGS
287 config PPC_ADV_DEBUG_DAC_RANGE
289 depends on PPC_ADV_DEBUG_REGS && 44x
292 config PPC_EMULATE_SSTEP
294 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
300 source "init/Kconfig"
302 source "kernel/Kconfig.freezer"
304 source "arch/powerpc/sysdev/Kconfig"
305 source "arch/powerpc/platforms/Kconfig"
307 menu "Kernel options"
310 bool "High memory support"
313 source kernel/Kconfig.hz
314 source kernel/Kconfig.preempt
315 source "fs/Kconfig.binfmt"
317 config HUGETLB_PAGE_SIZE_VARIABLE
319 depends on HUGETLB_PAGE
322 config MATH_EMULATION
323 bool "Math emulation"
324 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
326 Some PowerPC chips designed for embedded applications do not have
327 a floating-point unit and therefore do not implement the
328 floating-point instructions in the PowerPC instruction set. If you
329 say Y here, the kernel will include code to emulate a floating-point
330 unit, which will allow programs that use floating-point
333 This is also useful to emulate missing (optional) instructions
334 such as fsqrt on cores that do have an FPU but do not implement
335 them (such as Freescale BookE).
338 prompt "Math emulation options"
339 default MATH_EMULATION_FULL
340 depends on MATH_EMULATION
342 config MATH_EMULATION_FULL
343 bool "Emulate all the floating point instructions"
345 Select this option will enable the kernel to support to emulate
346 all the floating point instructions. If your SoC doesn't have
347 a FPU, you should select this.
349 config MATH_EMULATION_HW_UNIMPLEMENTED
350 bool "Just emulate the FPU unimplemented instructions"
352 Select this if you know there does have a hardware FPU on your
353 SoC, but some floating point instructions are not implemented by that.
357 config PPC_TRANSACTIONAL_MEM
358 bool "Transactional Memory support for POWERPC"
359 depends on PPC_BOOK3S_64
365 Support user-mode Transactional Memory on POWERPC.
371 bool "SWIOTLB support"
375 Support for IO bounce buffering for systems without an IOMMU.
376 This allows us to DMA to the full physical address space on
377 platforms where the size of a physical address is larger
378 than the bus address. Not all platforms support this.
381 bool "Support for enabling/disabling CPUs"
382 depends on SMP && (PPC_PSERIES || \
383 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
385 Say Y here to be able to disable and re-enable individual
386 CPUs at runtime on SMP machines.
388 Say N if you are unsure.
390 config ARCH_CPU_PROBE_RELEASE
392 depends on HOTPLUG_CPU
394 config ARCH_ENABLE_MEMORY_HOTPLUG
397 config ARCH_HAS_WALK_MEMORY
400 config ARCH_ENABLE_MEMORY_HOTREMOVE
403 config PPC64_SUPPORTS_MEMORY_FAILURE
404 bool "Add support for memory hwpoison"
405 depends on PPC_BOOK3S_64
406 default "y" if PPC_POWERNV
407 select ARCH_SUPPORTS_MEMORY_FAILURE
410 bool "kexec system call"
411 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
413 kexec is a system call that implements the ability to shutdown your
414 current kernel, and to start another kernel. It is like a reboot
415 but it is independent of the system firmware. And like a reboot
416 you can start any kernel with it, not just Linux.
418 The name comes from the similarity to the exec system call.
420 It is an ongoing process to be certain the hardware in a machine
421 is properly shutdown, so do not be surprised if this code does not
422 initially work for you. As of this writing the exact hardware
423 interface is strongly in flux, so no good recommendation can be
427 bool "Build a kdump crash kernel"
428 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
429 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
431 Build a kernel suitable for use as a kdump capture kernel.
432 The same kernel binary can be used as production kernel and dump
436 bool "Firmware-assisted dump"
437 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
439 A robust mechanism to get reliable kernel crash dump with
440 assistance from firmware. This approach does not use kexec,
441 instead firmware assists in booting the kdump kernel
442 while preserving memory contents. Firmware-assisted dump
443 is meant to be a kdump replacement offering robustness and
444 speed not possible without system firmware assistance.
449 bool "Distribute interrupts on all CPUs by default"
452 This option gives the kernel permission to distribute IRQs across
453 multiple CPUs. Saying N here will route all IRQs to the first
454 CPU. Generally saying Y is safe, although some problems have been
455 reported with SMP Power Macintoshes with this option enabled.
460 default y if SMP && PPC_PSERIES
466 depends on NEED_MULTIPLE_NODES
468 config USE_PERCPU_NUMA_NODE_ID
472 config HAVE_MEMORYLESS_NODES
476 config ARCH_SELECT_MEMORY_MODEL
480 config ARCH_FLATMEM_ENABLE
482 depends on (PPC64 && !NUMA) || PPC32
484 config ARCH_SPARSEMEM_ENABLE
487 select SPARSEMEM_VMEMMAP_ENABLE
489 config ARCH_SPARSEMEM_DEFAULT
491 depends on (SMP && PPC_PSERIES) || PPC_PS3
493 config SYS_SUPPORTS_HUGETLBFS
498 config ARCH_MEMORY_PROBE
500 depends on MEMORY_HOTPLUG
502 # Some NUMA nodes have memory ranges that span
503 # other nodes. Even though a pfn is valid and
504 # between a node's start and end pfns, it may not
505 # reside on that node. See memmap_init_zone()
507 config NODES_SPAN_OTHER_NODES
509 depends on NEED_MULTIPLE_NODES
511 config PPC_HAS_HASH_64K
517 bool "Using standard binutils settings"
521 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
522 Note, that kernel will be able to run only those applications,
523 which had been compiled using binutils later than 2.17.50.0.3 with
524 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
525 the older binutils, you can patch them with a trivial patch, which
526 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
532 Select the kernel logical page size. Increasing the page size
533 will reduce software overhead at each page boundary, allow
534 hardware prefetch mechanisms to be more effective, and allow
535 larger dma transfers increasing IO efficiency and reducing
536 overhead. However the utilization of memory will increase.
537 For example, each cached file will using a multiple of the
538 page size to hold its contents and the difference between the
539 end of file and the end of page is wasted.
541 Some dedicated systems, such as software raid serving with
542 accelerated calculations, have shown significant increases.
544 If you configure a 64 bit kernel for 64k pages but the
545 processor does not support them, then the kernel will simulate
546 them with 4k pages, loading them on demand, but with the
547 reduced software overhead and larger internal fragmentation.
548 For the 32 bit kernel, a large page option will not be offered
549 unless it is supported by the configured processor.
551 If unsure, choose 4K_PAGES.
557 bool "16k page size" if 44x || PPC_8xx
560 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
561 depends on !PPC_FSL_BOOK3E
562 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
564 config PPC_256K_PAGES
565 bool "256k page size" if 44x
566 depends on !STDBINUTILS
568 Make the page size 256k.
570 As the ELF standard only requires alignment to support page
571 sizes up to 64k, you will need to compile all of your user
572 space applications with a non-standard binutils settings
573 (see the STDBINUTILS description for details).
575 Say N unless you know what you are doing.
579 config FORCE_MAX_ZONEORDER
580 int "Maximum zone order"
581 range 9 64 if PPC64 && PPC_64K_PAGES
582 default "9" if PPC64 && PPC_64K_PAGES
583 range 13 64 if PPC64 && !PPC_64K_PAGES
584 default "13" if PPC64 && !PPC_64K_PAGES
585 range 9 64 if PPC32 && PPC_16K_PAGES
586 default "9" if PPC32 && PPC_16K_PAGES
587 range 7 64 if PPC32 && PPC_64K_PAGES
588 default "7" if PPC32 && PPC_64K_PAGES
589 range 5 64 if PPC32 && PPC_256K_PAGES
590 default "5" if PPC32 && PPC_256K_PAGES
594 The kernel memory allocator divides physically contiguous memory
595 blocks into "zones", where each zone is a power of two number of
596 pages. This option selects the largest power of two that the kernel
597 keeps in the memory allocator. If you need to allocate very large
598 blocks of physically contiguous memory, then you may need to
601 This config option is actually maximum order plus one. For example,
602 a value of 11 means that the largest free memory block is 2^10 pages.
604 The page size is not necessarily 4KB. For example, on 64-bit
605 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
606 this in mind when choosing a value for this option.
608 config PPC_SUBPAGE_PROT
609 bool "Support setting protections for 4k subpages"
610 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
612 This option adds support for a system call to allow user programs
613 to set access permissions (read/write, readonly, or no access)
614 on the 4k subpages of each 64k page.
616 config PPC_COPRO_BASE
621 bool "SMT (Hyperthreading) scheduler support"
622 depends on PPC64 && SMP
624 SMT scheduler support improves the CPU scheduler's decision making
625 when dealing with POWER5 cpus at a cost of slightly increased
626 overhead in some places. If unsure say N here.
628 config PPC_DENORMALISATION
629 bool "PowerPC denormalisation exception handling"
630 depends on PPC_BOOK3S_64
631 default "y" if PPC_POWERNV
633 Add support for handling denormalisation of single precision
634 values. Useful for bare metal only. If unsure say Y here.
637 bool "Default bootloader kernel arguments"
640 string "Initial kernel command string"
641 depends on CMDLINE_BOOL
642 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
644 On some platforms, there is currently no way for the boot loader to
645 pass arguments to the kernel. For these platforms, you can supply
646 some command-line options at build time by entering them here. In
647 most cases you will need to specify the root device here.
650 bool "Always use the default kernel command string"
651 depends on CMDLINE_BOOL
653 Always use the default kernel command string, even if the boot
654 loader passes other arguments to the kernel.
655 This is useful if you cannot or don't want to change the
656 command-line options your boot loader passes to the kernel.
659 string "Additional default image types"
661 List additional targets to be built by the bootwrapper here (separated
662 by spaces). This is useful for targets that depend of device tree
663 files in the .dts directory.
665 Targets in this list will be build as part of the default build
666 target, or when the user does a 'make zImage' or a
667 'make zImage.initrd'.
669 If unsure, leave blank
671 config ARCH_WANTS_FREEZER_CONTROL
675 source kernel/power/Kconfig
678 bool "Enable seccomp to safely compute untrusted bytecode"
682 This kernel feature is useful for number crunching applications
683 that may need to compute untrusted bytecode during their
684 execution. By using pipes or other transports made available to
685 the process as file descriptors supporting the read/write
686 syscalls, it's possible to isolate those applications in
687 their own address space using seccomp. Once seccomp is
688 enabled via /proc/<pid>/seccomp, it cannot be disabled
689 and the task is only allowed to execute a few safe syscalls
690 defined by each seccomp mode.
692 If unsure, say Y. Only embedded should say N here.
703 bool "Support for ISA-bus hardware"
707 Find out whether you have ISA slots on your motherboard. ISA is the
708 name of a bus system, i.e. the way the CPU talks to the other stuff
709 inside your box. If you have an Apple machine, say N here; if you
710 have an IBM RS/6000 or pSeries machine, say Y. If you have an
711 embedded board, consult your board documentation.
717 config NEED_DMA_MAP_STATE
718 def_bool (PPC64 || NOT_COHERENT_CACHE)
720 config NEED_SG_DMA_LENGTH
723 config GENERIC_ISA_DMA
725 depends on ISA_DMA_API
728 config PPC_INDIRECT_PCI
731 default y if 40x || 44x
745 select PPC_INDIRECT_PCI
751 depends on SUSPEND && (PPC_85xx || PPC_86xx)
753 Freescale MPC85xx/MPC86xx power management controller support
754 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
759 depends on SUSPEND && (44x || 40x)
761 PPC4xx Clock Power Management (CPM) support (suspend/resume).
762 It also enables support for two different idle states (idle-wait
769 bool "Freescale Local Bus support"
772 Enables reporting of errors from the Freescale local bus
773 controller. Also contains some common code used by
774 drivers for specific local bus peripherals.
778 depends on PPC_83xx || QUICC_ENGINE || CPM2
780 Freescale General-purpose Timers support
782 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
786 # Platforms that what PCI turned unconditionally just do select PCI
787 # in their config node. Platforms that want to choose at config
788 # time should select PPC_PCI_CHOICE
789 config PPC_PCI_CHOICE
793 bool "PCI support" if PPC_PCI_CHOICE
794 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
795 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
796 default PCI_QSPAN if !4xx && !CPM2 && 8xx
797 select GENERIC_PCI_IOMAP
799 Find out whether your system includes a PCI bus. PCI is the name of
800 a bus system, i.e. the way the CPU talks to the other stuff inside
801 your box. If you say Y here, the kernel will include drivers and
802 infrastructure code to support PCI bus devices.
812 depends on !4xx && !CPM2 && 8xx
815 Say Y here if you have a system based on a Motorola 8xx-series
816 embedded processor with a QSPAN PCI interface, otherwise say N.
820 depends on PCI && 8260
821 select PPC_INDIRECT_PCI
824 source "drivers/pci/pcie/Kconfig"
826 source "drivers/pci/Kconfig"
828 source "drivers/pcmcia/Kconfig"
830 source "drivers/pci/hotplug/Kconfig"
837 tristate "RapidIO support"
838 depends on HAS_RAPIDIO || PCI
840 If you say Y here, the kernel will include drivers and
841 infrastructure code to support RapidIO interconnect devices.
844 bool "Freescale Embedded SRIO Controller support"
845 depends on RAPIDIO = y && HAS_RAPIDIO
848 Include support for RapidIO controller on Freescale embedded
849 processors (MPC8548, MPC8641, etc).
851 source "drivers/rapidio/Kconfig"
855 config NONSTATIC_KERNEL
859 menu "Advanced setup"
862 config ADVANCED_OPTIONS
863 bool "Prompt for advanced kernel configuration options"
865 This option will enable prompting for a variety of advanced kernel
866 configuration options. These options can cause the kernel to not
867 work if they are set incorrectly, but can be used to optimize certain
868 aspects of kernel memory management.
870 Unless you know what you are doing, say N here.
872 comment "Default settings for advanced configuration options are used"
873 depends on !ADVANCED_OPTIONS
875 config LOWMEM_SIZE_BOOL
876 bool "Set maximum low memory"
877 depends on ADVANCED_OPTIONS
879 This option allows you to set the maximum amount of memory which
880 will be used as "low memory", that is, memory which the kernel can
881 access directly, without having to set up a kernel virtual mapping.
882 This can be useful in optimizing the layout of kernel virtual
885 Say N here unless you know what you are doing.
888 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
891 config LOWMEM_CAM_NUM_BOOL
892 bool "Set number of CAMs to use to map low memory"
893 depends on ADVANCED_OPTIONS && FSL_BOOKE
895 This option allows you to set the maximum number of CAM slots that
896 will be used to map low memory. There are a limited number of slots
897 available and even more limited number that will fit in the L1 MMU.
898 However, using more entries will allow mapping more low memory. This
899 can be useful in optimizing the layout of kernel virtual memory.
901 Say N here unless you know what you are doing.
903 config LOWMEM_CAM_NUM
905 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
908 config DYNAMIC_MEMSTART
909 bool "Enable page aligned dynamic load address for kernel"
910 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
911 select NONSTATIC_KERNEL
913 This option enables the kernel to be loaded at any page aligned
914 physical address. The kernel creates a mapping from KERNELBASE to
915 the address where the kernel is loaded. The page size here implies
916 the TLB page size of the mapping for kernel on the particular platform.
917 Please refer to the init code for finding the TLB page size.
919 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
920 kernel image, where the only restriction is the page aligned kernel
921 load address. When this option is enabled, the compile time physical
922 address CONFIG_PHYSICAL_START is ignored.
924 This option is overridden by CONFIG_RELOCATABLE
927 bool "Build a relocatable kernel"
928 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
929 select NONSTATIC_KERNEL
931 This builds a kernel image that is capable of running at the
932 location the kernel is loaded at, without any alignment restrictions.
933 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
935 One use is for the kexec on panic case where the recovery kernel
936 must live at a different physical address than the primary
939 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
940 it has been loaded at and the compile time physical addresses
941 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
942 setting can still be useful to bootwrappers that need to know the
943 load address of the kernel (eg. u-boot/mkimage).
945 config RELOCATABLE_PPC32
947 depends on PPC32 && RELOCATABLE
949 config PAGE_OFFSET_BOOL
950 bool "Set custom page offset address"
951 depends on ADVANCED_OPTIONS
953 This option allows you to set the kernel virtual address at which
954 the kernel will map low memory. This can be useful in optimizing
955 the virtual memory layout of the system.
957 Say N here unless you know what you are doing.
960 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
963 config KERNEL_START_BOOL
964 bool "Set custom kernel base address"
965 depends on ADVANCED_OPTIONS
967 This option allows you to set the kernel virtual address at which
968 the kernel will be loaded. Normally this should match PAGE_OFFSET
969 however there are times (like kdump) that one might not want them
972 Say N here unless you know what you are doing.
975 hex "Virtual address of kernel base" if KERNEL_START_BOOL
976 default PAGE_OFFSET if PAGE_OFFSET_BOOL
977 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
980 config PHYSICAL_START_BOOL
981 bool "Set physical address where the kernel is loaded"
982 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
984 This gives the physical address where the kernel is loaded.
986 Say N here unless you know what you are doing.
988 config PHYSICAL_START
989 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
990 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
993 config PHYSICAL_ALIGN
995 default "0x04000000" if FSL_BOOKE
997 This value puts the alignment restrictions on physical address
998 where kernel is loaded and run from. Kernel is compiled for an
999 address which meets above alignment restriction.
1001 config TASK_SIZE_BOOL
1002 bool "Set custom user task size"
1003 depends on ADVANCED_OPTIONS
1005 This option allows you to set the amount of virtual address space
1006 allocated to user tasks. This can be useful in optimizing the
1007 virtual memory layout of the system.
1009 Say N here unless you know what you are doing.
1012 hex "Size of user task space" if TASK_SIZE_BOOL
1013 default "0x80000000" if PPC_8xx
1014 default "0xc0000000"
1016 config CONSISTENT_SIZE_BOOL
1017 bool "Set custom consistent memory pool size"
1018 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1020 This option allows you to set the size of the
1021 consistent memory pool. This pool of virtual memory
1022 is used to make consistent memory allocations.
1024 config CONSISTENT_SIZE
1025 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1026 default "0x00200000" if NOT_COHERENT_CACHE
1029 bool "Pinned Kernel TLBs (860 ONLY)"
1030 depends on ADVANCED_OPTIONS && 8xx
1035 bool "Build a relocatable kernel"
1036 depends on !COMPILE_TEST
1037 select NONSTATIC_KERNEL
1039 This builds a kernel image that is capable of running anywhere
1040 in the RMA (real memory area) at any 16k-aligned base address.
1041 The kernel is linked as a position-independent executable (PIE)
1042 and contains dynamic relocations which are processed early
1043 in the bootup process.
1045 One use is for the kexec on panic case where the recovery kernel
1046 must live at a different physical address than the primary
1049 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1052 default "0xc000000000000000"
1055 default "0xc000000000000000"
1056 config PHYSICAL_START
1058 default "0x00000000"
1064 source "net/Kconfig"
1066 source "drivers/Kconfig"
1070 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1072 source "lib/Kconfig"
1074 source "arch/powerpc/Kconfig.debug"
1076 source "security/Kconfig"
1080 depends on COMPAT && KEYS
1083 source "crypto/Kconfig"
1085 config PPC_LIB_RHEAP
1088 source "arch/powerpc/kvm/Kconfig"