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
63 default y if PREEMPT_RT_FULL
65 config RWSEM_XCHGADD_ALGORITHM
67 default y if !PREEMPT_RT_FULL
69 config GENERIC_LOCKBREAK
72 depends on SMP && PREEMPT
74 config ARCH_HAS_ILOG2_U32
78 config ARCH_HAS_ILOG2_U64
82 config GENERIC_HWEIGHT
86 config ARCH_HAS_DMA_SET_COHERENT_MASK
92 select ARCH_MIGHT_HAVE_PC_PARPORT
93 select ARCH_MIGHT_HAVE_PC_SERIO
95 select ARCH_HAS_ELF_RANDOMIZE
97 select OF_EARLY_FLATTREE
98 select OF_RESERVED_MEM
99 select HAVE_FTRACE_MCOUNT_RECORD
100 select HAVE_DYNAMIC_FTRACE
101 select HAVE_FUNCTION_TRACER
102 select HAVE_FUNCTION_GRAPH_TRACER
103 select SYSCTL_EXCEPTION_TRACE
104 select ARCH_WANT_OPTIONAL_GPIOLIB
105 select VIRT_TO_BUS if !PPC64
107 select HAVE_IOREMAP_PROT
108 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
110 select HAVE_ARCH_KGDB
111 select HAVE_KRETPROBES
112 select HAVE_ARCH_TRACEHOOK
114 select HAVE_MEMBLOCK_NODE_MAP
115 select HAVE_DMA_ATTRS
116 select HAVE_DMA_API_DEBUG
118 select HAVE_DEBUG_KMEMLEAK
119 select ARCH_HAS_SG_CHAIN
120 select GENERIC_ATOMIC64 if PPC32
121 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
122 select HAVE_PERF_EVENTS
123 select HAVE_REGS_AND_STACK_ACCESS_API
124 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
125 select ARCH_WANT_IPC_PARSE_VERSION
128 select GENERIC_IRQ_SHOW
129 select GENERIC_IRQ_SHOW_LEVEL
130 select IRQ_FORCED_THREADING
131 select HAVE_RCU_TABLE_FREE if SMP
132 select HAVE_SYSCALL_TRACEPOINTS
134 select HAVE_ARCH_JUMP_LABEL
135 select ARCH_HAVE_NMI_SAFE_CMPXCHG
136 select ARCH_HAS_GCOV_PROFILE_ALL
137 select GENERIC_SMP_IDLE_THREAD
138 select GENERIC_CMOS_UPDATE
139 select GENERIC_TIME_VSYSCALL_OLD
140 select GENERIC_CLOCKEVENTS
141 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
142 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
143 select GENERIC_STRNCPY_FROM_USER
144 select GENERIC_STRNLEN_USER
145 select HAVE_PREEMPT_LAZY
146 select HAVE_MOD_ARCH_SPECIFIC
147 select MODULES_USE_ELF_RELA
148 select CLONE_BACKWARDS
149 select ARCH_USE_BUILTIN_BSWAP
150 select OLD_SIGSUSPEND
151 select OLD_SIGACTION if PPC32
152 select HAVE_DEBUG_STACKOVERFLOW
153 select HAVE_IRQ_EXIT_ON_IRQ_STACK
154 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
155 select HAVE_ARCH_AUDITSYSCALL
156 select ARCH_SUPPORTS_ATOMIC_RMW
157 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
159 select HAVE_GENERIC_RCU_GUP
160 select HAVE_PERF_EVENTS_NMI if PPC64
162 select EDAC_ATOMIC_SCRUB
163 select ARCH_HAS_DMA_SET_COHERENT_MASK
164 select HAVE_ARCH_SECCOMP_FILTER
167 def_bool CPU_LITTLE_ENDIAN
180 select COMPAT_BINFMT_ELF
181 select ARCH_WANT_OLD_COMPAT_IPC
182 select COMPAT_OLD_SIGACTION
184 config SYSVIPC_COMPAT
186 depends on COMPAT && SYSVIPC
189 # All PPC32s use generic nvram driver through ppc_md
194 config SCHED_OMIT_FRAME_POINTER
198 config ARCH_MAY_HAVE_PC_FDC
202 config PPC_UDBG_16550
206 config GENERIC_TBSYNC
208 default y if PPC32 && SMP
220 config SYS_SUPPORTS_APM_EMULATION
221 default y if PMAC_APM_EMU
227 Used to allow a board to specify it wants an ePAPR compliant wrapper.
230 config DEFAULT_UIMAGE
233 Used to allow a board to specify it wants a uImage built by default
236 config ARCH_HIBERNATION_POSSIBLE
240 config ARCH_SUSPEND_POSSIBLE
242 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
243 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
246 config PPC_DCR_NATIVE
256 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
259 config PPC_OF_PLATFORM_PCI
262 depends on PPC64 # not supported on 32 bits yet
265 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
266 depends on PPC32 || PPC_STD_MMU_64
269 config ARCH_SUPPORTS_UPROBES
272 config PPC_ADV_DEBUG_REGS
274 depends on 40x || BOOKE
277 config PPC_ADV_DEBUG_IACS
279 depends on PPC_ADV_DEBUG_REGS
283 config PPC_ADV_DEBUG_DACS
285 depends on PPC_ADV_DEBUG_REGS
288 config PPC_ADV_DEBUG_DVCS
290 depends on PPC_ADV_DEBUG_REGS
294 config PPC_ADV_DEBUG_DAC_RANGE
296 depends on PPC_ADV_DEBUG_REGS && 44x
299 config PPC_EMULATE_SSTEP
301 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
307 config PGTABLE_LEVELS
310 default 3 if PPC_64K_PAGES
313 source "init/Kconfig"
315 source "kernel/Kconfig.freezer"
317 source "arch/powerpc/sysdev/Kconfig"
318 source "arch/powerpc/platforms/Kconfig"
320 menu "Kernel options"
323 bool "High memory support"
324 depends on PPC32 && !PREEMPT_RT_FULL
326 source kernel/Kconfig.hz
327 source kernel/Kconfig.preempt
328 source "fs/Kconfig.binfmt"
330 config HUGETLB_PAGE_SIZE_VARIABLE
332 depends on HUGETLB_PAGE
335 config MATH_EMULATION
336 bool "Math emulation"
337 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
339 Some PowerPC chips designed for embedded applications do not have
340 a floating-point unit and therefore do not implement the
341 floating-point instructions in the PowerPC instruction set. If you
342 say Y here, the kernel will include code to emulate a floating-point
343 unit, which will allow programs that use floating-point
346 This is also useful to emulate missing (optional) instructions
347 such as fsqrt on cores that do have an FPU but do not implement
348 them (such as Freescale BookE).
351 prompt "Math emulation options"
352 default MATH_EMULATION_FULL
353 depends on MATH_EMULATION
355 config MATH_EMULATION_FULL
356 bool "Emulate all the floating point instructions"
358 Select this option will enable the kernel to support to emulate
359 all the floating point instructions. If your SoC doesn't have
360 a FPU, you should select this.
362 config MATH_EMULATION_HW_UNIMPLEMENTED
363 bool "Just emulate the FPU unimplemented instructions"
365 Select this if you know there does have a hardware FPU on your
366 SoC, but some floating point instructions are not implemented by that.
370 config PPC_TRANSACTIONAL_MEM
371 bool "Transactional Memory support for POWERPC"
372 depends on PPC_BOOK3S_64
378 Support user-mode Transactional Memory on POWERPC.
384 bool "SWIOTLB support"
388 Support for IO bounce buffering for systems without an IOMMU.
389 This allows us to DMA to the full physical address space on
390 platforms where the size of a physical address is larger
391 than the bus address. Not all platforms support this.
394 bool "Support for enabling/disabling CPUs"
395 depends on SMP && (PPC_PSERIES || \
396 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
398 Say Y here to be able to disable and re-enable individual
399 CPUs at runtime on SMP machines.
401 Say N if you are unsure.
403 config ARCH_CPU_PROBE_RELEASE
405 depends on HOTPLUG_CPU
407 config ARCH_ENABLE_MEMORY_HOTPLUG
410 config ARCH_HAS_WALK_MEMORY
413 config ARCH_ENABLE_MEMORY_HOTREMOVE
416 config PPC64_SUPPORTS_MEMORY_FAILURE
417 bool "Add support for memory hwpoison"
418 depends on PPC_BOOK3S_64
419 default "y" if PPC_POWERNV
420 select ARCH_SUPPORTS_MEMORY_FAILURE
423 bool "kexec system call"
424 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
427 kexec is a system call that implements the ability to shutdown your
428 current kernel, and to start another kernel. It is like a reboot
429 but it is independent of the system firmware. And like a reboot
430 you can start any kernel with it, not just Linux.
432 The name comes from the similarity to the exec system call.
434 It is an ongoing process to be certain the hardware in a machine
435 is properly shutdown, so do not be surprised if this code does not
436 initially work for you. As of this writing the exact hardware
437 interface is strongly in flux, so no good recommendation can be
441 bool "Build a kdump crash kernel"
442 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
443 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
445 Build a kernel suitable for use as a kdump capture kernel.
446 The same kernel binary can be used as production kernel and dump
450 bool "Firmware-assisted dump"
451 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
453 A robust mechanism to get reliable kernel crash dump with
454 assistance from firmware. This approach does not use kexec,
455 instead firmware assists in booting the kdump kernel
456 while preserving memory contents. Firmware-assisted dump
457 is meant to be a kdump replacement offering robustness and
458 speed not possible without system firmware assistance.
463 bool "Distribute interrupts on all CPUs by default"
466 This option gives the kernel permission to distribute IRQs across
467 multiple CPUs. Saying N here will route all IRQs to the first
468 CPU. Generally saying Y is safe, although some problems have been
469 reported with SMP Power Macintoshes with this option enabled.
474 default y if SMP && PPC_PSERIES
480 depends on NEED_MULTIPLE_NODES
482 config USE_PERCPU_NUMA_NODE_ID
486 config HAVE_MEMORYLESS_NODES
490 config ARCH_SELECT_MEMORY_MODEL
494 config ARCH_FLATMEM_ENABLE
496 depends on (PPC64 && !NUMA) || PPC32
498 config ARCH_SPARSEMEM_ENABLE
501 select SPARSEMEM_VMEMMAP_ENABLE
503 config ARCH_SPARSEMEM_DEFAULT
505 depends on (SMP && PPC_PSERIES) || PPC_PS3
507 config SYS_SUPPORTS_HUGETLBFS
512 config ARCH_MEMORY_PROBE
514 depends on MEMORY_HOTPLUG
516 # Some NUMA nodes have memory ranges that span
517 # other nodes. Even though a pfn is valid and
518 # between a node's start and end pfns, it may not
519 # reside on that node. See memmap_init_zone()
521 config NODES_SPAN_OTHER_NODES
523 depends on NEED_MULTIPLE_NODES
526 bool "Using standard binutils settings"
530 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
531 Note, that kernel will be able to run only those applications,
532 which had been compiled using binutils later than 2.17.50.0.3 with
533 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
534 the older binutils, you can patch them with a trivial patch, which
535 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
541 Select the kernel logical page size. Increasing the page size
542 will reduce software overhead at each page boundary, allow
543 hardware prefetch mechanisms to be more effective, and allow
544 larger dma transfers increasing IO efficiency and reducing
545 overhead. However the utilization of memory will increase.
546 For example, each cached file will using a multiple of the
547 page size to hold its contents and the difference between the
548 end of file and the end of page is wasted.
550 Some dedicated systems, such as software raid serving with
551 accelerated calculations, have shown significant increases.
553 If you configure a 64 bit kernel for 64k pages but the
554 processor does not support them, then the kernel will simulate
555 them with 4k pages, loading them on demand, but with the
556 reduced software overhead and larger internal fragmentation.
557 For the 32 bit kernel, a large page option will not be offered
558 unless it is supported by the configured processor.
560 If unsure, choose 4K_PAGES.
567 depends on 44x || PPC_8xx
571 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
573 config PPC_256K_PAGES
574 bool "256k page size"
575 depends on 44x && !STDBINUTILS
577 Make the page size 256k.
579 As the ELF standard only requires alignment to support page
580 sizes up to 64k, you will need to compile all of your user
581 space applications with a non-standard binutils settings
582 (see the STDBINUTILS description for details).
584 Say N unless you know what you are doing.
588 config FORCE_MAX_ZONEORDER
589 int "Maximum zone order"
590 range 9 64 if PPC64 && PPC_64K_PAGES
591 default "9" if PPC64 && PPC_64K_PAGES
592 range 13 64 if PPC64 && !PPC_64K_PAGES
593 default "13" if PPC64 && !PPC_64K_PAGES
594 range 9 64 if PPC32 && PPC_16K_PAGES
595 default "9" if PPC32 && PPC_16K_PAGES
596 range 7 64 if PPC32 && PPC_64K_PAGES
597 default "7" if PPC32 && PPC_64K_PAGES
598 range 5 64 if PPC32 && PPC_256K_PAGES
599 default "5" if PPC32 && PPC_256K_PAGES
603 The kernel memory allocator divides physically contiguous memory
604 blocks into "zones", where each zone is a power of two number of
605 pages. This option selects the largest power of two that the kernel
606 keeps in the memory allocator. If you need to allocate very large
607 blocks of physically contiguous memory, then you may need to
610 This config option is actually maximum order plus one. For example,
611 a value of 11 means that the largest free memory block is 2^10 pages.
613 The page size is not necessarily 4KB. For example, on 64-bit
614 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
615 this in mind when choosing a value for this option.
617 config PPC_SUBPAGE_PROT
618 bool "Support setting protections for 4k subpages"
619 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
621 This option adds support for a system call to allow user programs
622 to set access permissions (read/write, readonly, or no access)
623 on the 4k subpages of each 64k page.
625 config PPC_COPRO_BASE
630 bool "SMT (Hyperthreading) scheduler support"
631 depends on PPC64 && SMP
633 SMT scheduler support improves the CPU scheduler's decision making
634 when dealing with POWER5 cpus at a cost of slightly increased
635 overhead in some places. If unsure say N here.
637 config PPC_DENORMALISATION
638 bool "PowerPC denormalisation exception handling"
639 depends on PPC_BOOK3S_64
640 default "y" if PPC_POWERNV
642 Add support for handling denormalisation of single precision
643 values. Useful for bare metal only. If unsure say Y here.
646 bool "Default bootloader kernel arguments"
649 string "Initial kernel command string"
650 depends on CMDLINE_BOOL
651 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
653 On some platforms, there is currently no way for the boot loader to
654 pass arguments to the kernel. For these platforms, you can supply
655 some command-line options at build time by entering them here. In
656 most cases you will need to specify the root device here.
659 bool "Always use the default kernel command string"
660 depends on CMDLINE_BOOL
662 Always use the default kernel command string, even if the boot
663 loader passes other arguments to the kernel.
664 This is useful if you cannot or don't want to change the
665 command-line options your boot loader passes to the kernel.
668 string "Additional default image types"
670 List additional targets to be built by the bootwrapper here (separated
671 by spaces). This is useful for targets that depend of device tree
672 files in the .dts directory.
674 Targets in this list will be build as part of the default build
675 target, or when the user does a 'make zImage' or a
676 'make zImage.initrd'.
678 If unsure, leave blank
680 config ARCH_WANTS_FREEZER_CONTROL
684 source kernel/power/Kconfig
687 bool "Enable seccomp to safely compute untrusted bytecode"
691 This kernel feature is useful for number crunching applications
692 that may need to compute untrusted bytecode during their
693 execution. By using pipes or other transports made available to
694 the process as file descriptors supporting the read/write
695 syscalls, it's possible to isolate those applications in
696 their own address space using seccomp. Once seccomp is
697 enabled via /proc/<pid>/seccomp, it cannot be disabled
698 and the task is only allowed to execute a few safe syscalls
699 defined by each seccomp mode.
701 If unsure, say Y. Only embedded should say N here.
712 bool "Support for ISA-bus hardware"
716 Find out whether you have ISA slots on your motherboard. ISA is the
717 name of a bus system, i.e. the way the CPU talks to the other stuff
718 inside your box. If you have an Apple machine, say N here; if you
719 have an IBM RS/6000 or pSeries machine, say Y. If you have an
720 embedded board, consult your board documentation.
726 config NEED_DMA_MAP_STATE
727 def_bool (PPC64 || NOT_COHERENT_CACHE)
729 config NEED_SG_DMA_LENGTH
732 config GENERIC_ISA_DMA
734 depends on ISA_DMA_API
737 config PPC_INDIRECT_PCI
740 default y if 40x || 44x
754 select PPC_INDIRECT_PCI
760 depends on SUSPEND && (PPC_85xx || PPC_86xx)
762 Freescale MPC85xx/MPC86xx power management controller support
763 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
768 depends on SUSPEND && (44x || 40x)
770 PPC4xx Clock Power Management (CPM) support (suspend/resume).
771 It also enables support for two different idle states (idle-wait
778 bool "Freescale Local Bus support"
781 Enables reporting of errors from the Freescale local bus
782 controller. Also contains some common code used by
783 drivers for specific local bus peripherals.
787 depends on PPC_83xx || QUICC_ENGINE || CPM2
789 Freescale General-purpose Timers support
791 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
795 # Platforms that what PCI turned unconditionally just do select PCI
796 # in their config node. Platforms that want to choose at config
797 # time should select PPC_PCI_CHOICE
798 config PPC_PCI_CHOICE
802 bool "PCI support" if PPC_PCI_CHOICE
803 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
804 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
805 default PCI_QSPAN if !4xx && !CPM2 && 8xx
806 select GENERIC_PCI_IOMAP
808 Find out whether your system includes a PCI bus. PCI is the name of
809 a bus system, i.e. the way the CPU talks to the other stuff inside
810 your box. If you say Y here, the kernel will include drivers and
811 infrastructure code to support PCI bus devices.
821 depends on !4xx && !CPM2 && 8xx
824 Say Y here if you have a system based on a Motorola 8xx-series
825 embedded processor with a QSPAN PCI interface, otherwise say N.
829 depends on PCI && 8260
830 select PPC_INDIRECT_PCI
833 source "drivers/pci/pcie/Kconfig"
835 source "drivers/pci/Kconfig"
837 source "drivers/pcmcia/Kconfig"
839 source "drivers/pci/hotplug/Kconfig"
846 tristate "RapidIO support"
847 depends on HAS_RAPIDIO || PCI
849 If you say Y here, the kernel will include drivers and
850 infrastructure code to support RapidIO interconnect devices.
853 bool "Freescale Embedded SRIO Controller support"
854 depends on RAPIDIO = y && HAS_RAPIDIO
857 Include support for RapidIO controller on Freescale embedded
858 processors (MPC8548, MPC8641, etc).
860 source "drivers/rapidio/Kconfig"
864 config NONSTATIC_KERNEL
868 menu "Advanced setup"
871 config ADVANCED_OPTIONS
872 bool "Prompt for advanced kernel configuration options"
874 This option will enable prompting for a variety of advanced kernel
875 configuration options. These options can cause the kernel to not
876 work if they are set incorrectly, but can be used to optimize certain
877 aspects of kernel memory management.
879 Unless you know what you are doing, say N here.
881 comment "Default settings for advanced configuration options are used"
882 depends on !ADVANCED_OPTIONS
884 config LOWMEM_SIZE_BOOL
885 bool "Set maximum low memory"
886 depends on ADVANCED_OPTIONS
888 This option allows you to set the maximum amount of memory which
889 will be used as "low memory", that is, memory which the kernel can
890 access directly, without having to set up a kernel virtual mapping.
891 This can be useful in optimizing the layout of kernel virtual
894 Say N here unless you know what you are doing.
897 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
900 config LOWMEM_CAM_NUM_BOOL
901 bool "Set number of CAMs to use to map low memory"
902 depends on ADVANCED_OPTIONS && FSL_BOOKE
904 This option allows you to set the maximum number of CAM slots that
905 will be used to map low memory. There are a limited number of slots
906 available and even more limited number that will fit in the L1 MMU.
907 However, using more entries will allow mapping more low memory. This
908 can be useful in optimizing the layout of kernel virtual memory.
910 Say N here unless you know what you are doing.
912 config LOWMEM_CAM_NUM
914 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
917 config DYNAMIC_MEMSTART
918 bool "Enable page aligned dynamic load address for kernel"
919 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
920 select NONSTATIC_KERNEL
922 This option enables the kernel to be loaded at any page aligned
923 physical address. The kernel creates a mapping from KERNELBASE to
924 the address where the kernel is loaded. The page size here implies
925 the TLB page size of the mapping for kernel on the particular platform.
926 Please refer to the init code for finding the TLB page size.
928 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
929 kernel image, where the only restriction is the page aligned kernel
930 load address. When this option is enabled, the compile time physical
931 address CONFIG_PHYSICAL_START is ignored.
933 This option is overridden by CONFIG_RELOCATABLE
936 bool "Build a relocatable kernel"
937 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
938 select NONSTATIC_KERNEL
940 This builds a kernel image that is capable of running at the
941 location the kernel is loaded at, without any alignment restrictions.
942 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
944 One use is for the kexec on panic case where the recovery kernel
945 must live at a different physical address than the primary
948 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
949 it has been loaded at and the compile time physical addresses
950 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
951 setting can still be useful to bootwrappers that need to know the
952 load address of the kernel (eg. u-boot/mkimage).
954 config RELOCATABLE_PPC32
956 depends on PPC32 && RELOCATABLE
958 config PAGE_OFFSET_BOOL
959 bool "Set custom page offset address"
960 depends on ADVANCED_OPTIONS
962 This option allows you to set the kernel virtual address at which
963 the kernel will map low memory. This can be useful in optimizing
964 the virtual memory layout of the system.
966 Say N here unless you know what you are doing.
969 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
972 config KERNEL_START_BOOL
973 bool "Set custom kernel base address"
974 depends on ADVANCED_OPTIONS
976 This option allows you to set the kernel virtual address at which
977 the kernel will be loaded. Normally this should match PAGE_OFFSET
978 however there are times (like kdump) that one might not want them
981 Say N here unless you know what you are doing.
984 hex "Virtual address of kernel base" if KERNEL_START_BOOL
985 default PAGE_OFFSET if PAGE_OFFSET_BOOL
986 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
989 config PHYSICAL_START_BOOL
990 bool "Set physical address where the kernel is loaded"
991 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
993 This gives the physical address where the kernel is loaded.
995 Say N here unless you know what you are doing.
997 config PHYSICAL_START
998 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
999 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1000 default "0x00000000"
1002 config PHYSICAL_ALIGN
1004 default "0x04000000" if FSL_BOOKE
1006 This value puts the alignment restrictions on physical address
1007 where kernel is loaded and run from. Kernel is compiled for an
1008 address which meets above alignment restriction.
1010 config TASK_SIZE_BOOL
1011 bool "Set custom user task size"
1012 depends on ADVANCED_OPTIONS
1014 This option allows you to set the amount of virtual address space
1015 allocated to user tasks. This can be useful in optimizing the
1016 virtual memory layout of the system.
1018 Say N here unless you know what you are doing.
1021 hex "Size of user task space" if TASK_SIZE_BOOL
1022 default "0x80000000" if PPC_8xx
1023 default "0xc0000000"
1025 config CONSISTENT_SIZE_BOOL
1026 bool "Set custom consistent memory pool size"
1027 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1029 This option allows you to set the size of the
1030 consistent memory pool. This pool of virtual memory
1031 is used to make consistent memory allocations.
1033 config CONSISTENT_SIZE
1034 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1035 default "0x00200000" if NOT_COHERENT_CACHE
1038 bool "Pinned Kernel TLBs (860 ONLY)"
1039 depends on ADVANCED_OPTIONS && 8xx
1044 bool "Build a relocatable kernel"
1045 depends on !COMPILE_TEST
1046 select NONSTATIC_KERNEL
1048 This builds a kernel image that is capable of running anywhere
1049 in the RMA (real memory area) at any 16k-aligned base address.
1050 The kernel is linked as a position-independent executable (PIE)
1051 and contains dynamic relocations which are processed early
1052 in the bootup process.
1054 One use is for the kexec on panic case where the recovery kernel
1055 must live at a different physical address than the primary
1058 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1061 default "0xc000000000000000"
1064 default "0xc000000000000000"
1065 config PHYSICAL_START
1067 default "0x00000000"
1073 source "net/Kconfig"
1075 source "drivers/Kconfig"
1079 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1081 source "lib/Kconfig"
1083 source "arch/powerpc/Kconfig.debug"
1085 source "security/Kconfig"
1089 depends on COMPAT && KEYS
1092 source "crypto/Kconfig"
1094 config PPC_LIB_RHEAP
1097 source "arch/powerpc/kvm/Kconfig"