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
85 config ARCH_HAS_DMA_SET_COHERENT_MASK
91 select ARCH_MIGHT_HAVE_PC_PARPORT
92 select ARCH_MIGHT_HAVE_PC_SERIO
94 select ARCH_HAS_ELF_RANDOMIZE
96 select OF_EARLY_FLATTREE
97 select OF_RESERVED_MEM
98 select HAVE_FTRACE_MCOUNT_RECORD
99 select HAVE_DYNAMIC_FTRACE
100 select HAVE_FUNCTION_TRACER
101 select HAVE_FUNCTION_GRAPH_TRACER
102 select SYSCTL_EXCEPTION_TRACE
103 select ARCH_WANT_OPTIONAL_GPIOLIB
104 select VIRT_TO_BUS if !PPC64
106 select HAVE_IOREMAP_PROT
107 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
109 select HAVE_ARCH_KGDB
110 select HAVE_KRETPROBES
111 select HAVE_ARCH_TRACEHOOK
113 select HAVE_MEMBLOCK_NODE_MAP
114 select HAVE_DMA_ATTRS
115 select HAVE_DMA_API_DEBUG
117 select HAVE_DEBUG_KMEMLEAK
118 select ARCH_HAS_SG_CHAIN
119 select GENERIC_ATOMIC64 if PPC32
120 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
121 select HAVE_PERF_EVENTS
122 select HAVE_REGS_AND_STACK_ACCESS_API
123 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
124 select ARCH_WANT_IPC_PARSE_VERSION
127 select GENERIC_IRQ_SHOW
128 select GENERIC_IRQ_SHOW_LEVEL
129 select IRQ_FORCED_THREADING
130 select HAVE_RCU_TABLE_FREE if SMP
131 select HAVE_SYSCALL_TRACEPOINTS
132 select HAVE_BPF_JIT if CPU_BIG_ENDIAN
133 select HAVE_ARCH_JUMP_LABEL
134 select ARCH_HAVE_NMI_SAFE_CMPXCHG
135 select ARCH_HAS_GCOV_PROFILE_ALL
136 select GENERIC_SMP_IDLE_THREAD
137 select GENERIC_CMOS_UPDATE
138 select GENERIC_TIME_VSYSCALL_OLD
139 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC
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_MOD_ARCH_SPECIFIC
146 select MODULES_USE_ELF_RELA
147 select CLONE_BACKWARDS
148 select ARCH_USE_BUILTIN_BSWAP
149 select OLD_SIGSUSPEND
150 select OLD_SIGACTION if PPC32
151 select HAVE_DEBUG_STACKOVERFLOW
152 select HAVE_IRQ_EXIT_ON_IRQ_STACK
153 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
154 select HAVE_ARCH_AUDITSYSCALL
155 select ARCH_SUPPORTS_ATOMIC_RMW
156 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
158 select HAVE_GENERIC_RCU_GUP
159 select HAVE_PERF_EVENTS_NMI if PPC64
161 select EDAC_ATOMIC_SCRUB
162 select ARCH_HAS_DMA_SET_COHERENT_MASK
163 select HAVE_ARCH_SECCOMP_FILTER
165 config PPC_BARRIER_NOSPEC
168 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
171 def_bool CPU_LITTLE_ENDIAN
184 select COMPAT_BINFMT_ELF
185 select ARCH_WANT_OLD_COMPAT_IPC
186 select COMPAT_OLD_SIGACTION
188 config SYSVIPC_COMPAT
190 depends on COMPAT && SYSVIPC
193 # All PPC32s use generic nvram driver through ppc_md
198 config SCHED_OMIT_FRAME_POINTER
202 config ARCH_MAY_HAVE_PC_FDC
206 config PPC_UDBG_16550
210 config GENERIC_TBSYNC
212 default y if PPC32 && SMP
224 config SYS_SUPPORTS_APM_EMULATION
225 default y if PMAC_APM_EMU
231 Used to allow a board to specify it wants an ePAPR compliant wrapper.
234 config DEFAULT_UIMAGE
237 Used to allow a board to specify it wants a uImage built by default
240 config ARCH_HIBERNATION_POSSIBLE
244 config ARCH_SUSPEND_POSSIBLE
246 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
247 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
250 config PPC_DCR_NATIVE
260 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
263 config PPC_OF_PLATFORM_PCI
266 depends on PPC64 # not supported on 32 bits yet
269 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
270 depends on PPC32 || PPC_STD_MMU_64
273 config ARCH_SUPPORTS_UPROBES
276 config PPC_ADV_DEBUG_REGS
278 depends on 40x || BOOKE
281 config PPC_ADV_DEBUG_IACS
283 depends on PPC_ADV_DEBUG_REGS
287 config PPC_ADV_DEBUG_DACS
289 depends on PPC_ADV_DEBUG_REGS
292 config PPC_ADV_DEBUG_DVCS
294 depends on PPC_ADV_DEBUG_REGS
298 config PPC_ADV_DEBUG_DAC_RANGE
300 depends on PPC_ADV_DEBUG_REGS && 44x
303 config PPC_EMULATE_SSTEP
305 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
311 config PGTABLE_LEVELS
314 default 3 if PPC_64K_PAGES
317 source "init/Kconfig"
319 source "kernel/Kconfig.freezer"
321 source "arch/powerpc/sysdev/Kconfig"
322 source "arch/powerpc/platforms/Kconfig"
324 menu "Kernel options"
327 bool "High memory support"
330 source kernel/Kconfig.hz
331 source kernel/Kconfig.preempt
332 source "fs/Kconfig.binfmt"
334 config HUGETLB_PAGE_SIZE_VARIABLE
336 depends on HUGETLB_PAGE
339 config MATH_EMULATION
340 bool "Math emulation"
341 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
343 Some PowerPC chips designed for embedded applications do not have
344 a floating-point unit and therefore do not implement the
345 floating-point instructions in the PowerPC instruction set. If you
346 say Y here, the kernel will include code to emulate a floating-point
347 unit, which will allow programs that use floating-point
350 This is also useful to emulate missing (optional) instructions
351 such as fsqrt on cores that do have an FPU but do not implement
352 them (such as Freescale BookE).
355 prompt "Math emulation options"
356 default MATH_EMULATION_FULL
357 depends on MATH_EMULATION
359 config MATH_EMULATION_FULL
360 bool "Emulate all the floating point instructions"
362 Select this option will enable the kernel to support to emulate
363 all the floating point instructions. If your SoC doesn't have
364 a FPU, you should select this.
366 config MATH_EMULATION_HW_UNIMPLEMENTED
367 bool "Just emulate the FPU unimplemented instructions"
369 Select this if you know there does have a hardware FPU on your
370 SoC, but some floating point instructions are not implemented by that.
374 config PPC_TRANSACTIONAL_MEM
375 bool "Transactional Memory support for POWERPC"
376 depends on PPC_BOOK3S_64
382 Support user-mode Transactional Memory on POWERPC.
388 bool "SWIOTLB support"
392 Support for IO bounce buffering for systems without an IOMMU.
393 This allows us to DMA to the full physical address space on
394 platforms where the size of a physical address is larger
395 than the bus address. Not all platforms support this.
398 bool "Support for enabling/disabling CPUs"
399 depends on SMP && (PPC_PSERIES || \
400 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
402 Say Y here to be able to disable and re-enable individual
403 CPUs at runtime on SMP machines.
405 Say N if you are unsure.
407 config ARCH_CPU_PROBE_RELEASE
409 depends on HOTPLUG_CPU
411 config ARCH_ENABLE_MEMORY_HOTPLUG
414 config ARCH_HAS_WALK_MEMORY
417 config ARCH_ENABLE_MEMORY_HOTREMOVE
420 config PPC64_SUPPORTS_MEMORY_FAILURE
421 bool "Add support for memory hwpoison"
422 depends on PPC_BOOK3S_64
423 default "y" if PPC_POWERNV
424 select ARCH_SUPPORTS_MEMORY_FAILURE
427 bool "kexec system call"
428 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
431 kexec is a system call that implements the ability to shutdown your
432 current kernel, and to start another kernel. It is like a reboot
433 but it is independent of the system firmware. And like a reboot
434 you can start any kernel with it, not just Linux.
436 The name comes from the similarity to the exec system call.
438 It is an ongoing process to be certain the hardware in a machine
439 is properly shutdown, so do not be surprised if this code does not
440 initially work for you. As of this writing the exact hardware
441 interface is strongly in flux, so no good recommendation can be
445 bool "Build a kdump crash kernel"
446 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
447 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
449 Build a kernel suitable for use as a kdump capture kernel.
450 The same kernel binary can be used as production kernel and dump
454 bool "Firmware-assisted dump"
455 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
457 A robust mechanism to get reliable kernel crash dump with
458 assistance from firmware. This approach does not use kexec,
459 instead firmware assists in booting the kdump kernel
460 while preserving memory contents. Firmware-assisted dump
461 is meant to be a kdump replacement offering robustness and
462 speed not possible without system firmware assistance.
467 bool "Distribute interrupts on all CPUs by default"
470 This option gives the kernel permission to distribute IRQs across
471 multiple CPUs. Saying N here will route all IRQs to the first
472 CPU. Generally saying Y is safe, although some problems have been
473 reported with SMP Power Macintoshes with this option enabled.
478 default y if SMP && PPC_PSERIES
484 depends on NEED_MULTIPLE_NODES
486 config USE_PERCPU_NUMA_NODE_ID
490 config HAVE_MEMORYLESS_NODES
494 config ARCH_SELECT_MEMORY_MODEL
498 config ARCH_FLATMEM_ENABLE
500 depends on (PPC64 && !NUMA) || PPC32
502 config ARCH_SPARSEMEM_ENABLE
505 select SPARSEMEM_VMEMMAP_ENABLE
507 config ARCH_SPARSEMEM_DEFAULT
509 depends on (SMP && PPC_PSERIES) || PPC_PS3
511 config SYS_SUPPORTS_HUGETLBFS
516 config ARCH_MEMORY_PROBE
518 depends on MEMORY_HOTPLUG
520 # Some NUMA nodes have memory ranges that span
521 # other nodes. Even though a pfn is valid and
522 # between a node's start and end pfns, it may not
523 # reside on that node. See memmap_init_zone()
525 config NODES_SPAN_OTHER_NODES
527 depends on NEED_MULTIPLE_NODES
530 bool "Using standard binutils settings"
534 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
535 Note, that kernel will be able to run only those applications,
536 which had been compiled using binutils later than 2.17.50.0.3 with
537 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
538 the older binutils, you can patch them with a trivial patch, which
539 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
545 Select the kernel logical page size. Increasing the page size
546 will reduce software overhead at each page boundary, allow
547 hardware prefetch mechanisms to be more effective, and allow
548 larger dma transfers increasing IO efficiency and reducing
549 overhead. However the utilization of memory will increase.
550 For example, each cached file will using a multiple of the
551 page size to hold its contents and the difference between the
552 end of file and the end of page is wasted.
554 Some dedicated systems, such as software raid serving with
555 accelerated calculations, have shown significant increases.
557 If you configure a 64 bit kernel for 64k pages but the
558 processor does not support them, then the kernel will simulate
559 them with 4k pages, loading them on demand, but with the
560 reduced software overhead and larger internal fragmentation.
561 For the 32 bit kernel, a large page option will not be offered
562 unless it is supported by the configured processor.
564 If unsure, choose 4K_PAGES.
571 depends on 44x || PPC_8xx
575 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
577 config PPC_256K_PAGES
578 bool "256k page size"
579 depends on 44x && !STDBINUTILS
581 Make the page size 256k.
583 As the ELF standard only requires alignment to support page
584 sizes up to 64k, you will need to compile all of your user
585 space applications with a non-standard binutils settings
586 (see the STDBINUTILS description for details).
588 Say N unless you know what you are doing.
592 config FORCE_MAX_ZONEORDER
593 int "Maximum zone order"
594 range 9 64 if PPC64 && PPC_64K_PAGES
595 default "9" if PPC64 && PPC_64K_PAGES
596 range 13 64 if PPC64 && !PPC_64K_PAGES
597 default "13" if PPC64 && !PPC_64K_PAGES
598 range 9 64 if PPC32 && PPC_16K_PAGES
599 default "9" if PPC32 && PPC_16K_PAGES
600 range 7 64 if PPC32 && PPC_64K_PAGES
601 default "7" if PPC32 && PPC_64K_PAGES
602 range 5 64 if PPC32 && PPC_256K_PAGES
603 default "5" if PPC32 && PPC_256K_PAGES
607 The kernel memory allocator divides physically contiguous memory
608 blocks into "zones", where each zone is a power of two number of
609 pages. This option selects the largest power of two that the kernel
610 keeps in the memory allocator. If you need to allocate very large
611 blocks of physically contiguous memory, then you may need to
614 This config option is actually maximum order plus one. For example,
615 a value of 11 means that the largest free memory block is 2^10 pages.
617 The page size is not necessarily 4KB. For example, on 64-bit
618 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
619 this in mind when choosing a value for this option.
621 config PPC_SUBPAGE_PROT
622 bool "Support setting protections for 4k subpages"
623 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
625 This option adds support for a system call to allow user programs
626 to set access permissions (read/write, readonly, or no access)
627 on the 4k subpages of each 64k page.
629 config PPC_COPRO_BASE
634 bool "SMT (Hyperthreading) scheduler support"
635 depends on PPC64 && SMP
637 SMT scheduler support improves the CPU scheduler's decision making
638 when dealing with POWER5 cpus at a cost of slightly increased
639 overhead in some places. If unsure say N here.
641 config PPC_DENORMALISATION
642 bool "PowerPC denormalisation exception handling"
643 depends on PPC_BOOK3S_64
644 default "y" if PPC_POWERNV
646 Add support for handling denormalisation of single precision
647 values. Useful for bare metal only. If unsure say Y here.
650 bool "Default bootloader kernel arguments"
653 string "Initial kernel command string"
654 depends on CMDLINE_BOOL
655 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
657 On some platforms, there is currently no way for the boot loader to
658 pass arguments to the kernel. For these platforms, you can supply
659 some command-line options at build time by entering them here. In
660 most cases you will need to specify the root device here.
663 bool "Always use the default kernel command string"
664 depends on CMDLINE_BOOL
666 Always use the default kernel command string, even if the boot
667 loader passes other arguments to the kernel.
668 This is useful if you cannot or don't want to change the
669 command-line options your boot loader passes to the kernel.
672 string "Additional default image types"
674 List additional targets to be built by the bootwrapper here (separated
675 by spaces). This is useful for targets that depend of device tree
676 files in the .dts directory.
678 Targets in this list will be build as part of the default build
679 target, or when the user does a 'make zImage' or a
680 'make zImage.initrd'.
682 If unsure, leave blank
684 config ARCH_WANTS_FREEZER_CONTROL
688 source kernel/power/Kconfig
691 bool "Enable seccomp to safely compute untrusted bytecode"
695 This kernel feature is useful for number crunching applications
696 that may need to compute untrusted bytecode during their
697 execution. By using pipes or other transports made available to
698 the process as file descriptors supporting the read/write
699 syscalls, it's possible to isolate those applications in
700 their own address space using seccomp. Once seccomp is
701 enabled via /proc/<pid>/seccomp, it cannot be disabled
702 and the task is only allowed to execute a few safe syscalls
703 defined by each seccomp mode.
705 If unsure, say Y. Only embedded should say N here.
716 bool "Support for ISA-bus hardware"
720 Find out whether you have ISA slots on your motherboard. ISA is the
721 name of a bus system, i.e. the way the CPU talks to the other stuff
722 inside your box. If you have an Apple machine, say N here; if you
723 have an IBM RS/6000 or pSeries machine, say Y. If you have an
724 embedded board, consult your board documentation.
730 config NEED_DMA_MAP_STATE
731 def_bool (PPC64 || NOT_COHERENT_CACHE)
733 config NEED_SG_DMA_LENGTH
736 config GENERIC_ISA_DMA
738 depends on ISA_DMA_API
741 config PPC_INDIRECT_PCI
744 default y if 40x || 44x
758 select PPC_INDIRECT_PCI
764 depends on SUSPEND && (PPC_85xx || PPC_86xx)
766 Freescale MPC85xx/MPC86xx power management controller support
767 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
772 depends on SUSPEND && (44x || 40x)
774 PPC4xx Clock Power Management (CPM) support (suspend/resume).
775 It also enables support for two different idle states (idle-wait
782 bool "Freescale Local Bus support"
785 Enables reporting of errors from the Freescale local bus
786 controller. Also contains some common code used by
787 drivers for specific local bus peripherals.
791 depends on PPC_83xx || QUICC_ENGINE || CPM2
793 Freescale General-purpose Timers support
795 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
799 # Platforms that what PCI turned unconditionally just do select PCI
800 # in their config node. Platforms that want to choose at config
801 # time should select PPC_PCI_CHOICE
802 config PPC_PCI_CHOICE
806 bool "PCI support" if PPC_PCI_CHOICE
807 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
808 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
809 default PCI_QSPAN if !4xx && !CPM2 && 8xx
810 select GENERIC_PCI_IOMAP
812 Find out whether your system includes a PCI bus. PCI is the name of
813 a bus system, i.e. the way the CPU talks to the other stuff inside
814 your box. If you say Y here, the kernel will include drivers and
815 infrastructure code to support PCI bus devices.
825 depends on !4xx && !CPM2 && 8xx
828 Say Y here if you have a system based on a Motorola 8xx-series
829 embedded processor with a QSPAN PCI interface, otherwise say N.
833 depends on PCI && 8260
834 select PPC_INDIRECT_PCI
837 source "drivers/pci/pcie/Kconfig"
839 source "drivers/pci/Kconfig"
841 source "drivers/pcmcia/Kconfig"
843 source "drivers/pci/hotplug/Kconfig"
850 tristate "RapidIO support"
851 depends on HAS_RAPIDIO || PCI
853 If you say Y here, the kernel will include drivers and
854 infrastructure code to support RapidIO interconnect devices.
857 bool "Freescale Embedded SRIO Controller support"
858 depends on RAPIDIO = y && HAS_RAPIDIO
861 Include support for RapidIO controller on Freescale embedded
862 processors (MPC8548, MPC8641, etc).
864 source "drivers/rapidio/Kconfig"
868 config NONSTATIC_KERNEL
872 menu "Advanced setup"
875 config ADVANCED_OPTIONS
876 bool "Prompt for advanced kernel configuration options"
878 This option will enable prompting for a variety of advanced kernel
879 configuration options. These options can cause the kernel to not
880 work if they are set incorrectly, but can be used to optimize certain
881 aspects of kernel memory management.
883 Unless you know what you are doing, say N here.
885 comment "Default settings for advanced configuration options are used"
886 depends on !ADVANCED_OPTIONS
888 config LOWMEM_SIZE_BOOL
889 bool "Set maximum low memory"
890 depends on ADVANCED_OPTIONS
892 This option allows you to set the maximum amount of memory which
893 will be used as "low memory", that is, memory which the kernel can
894 access directly, without having to set up a kernel virtual mapping.
895 This can be useful in optimizing the layout of kernel virtual
898 Say N here unless you know what you are doing.
901 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
904 config LOWMEM_CAM_NUM_BOOL
905 bool "Set number of CAMs to use to map low memory"
906 depends on ADVANCED_OPTIONS && FSL_BOOKE
908 This option allows you to set the maximum number of CAM slots that
909 will be used to map low memory. There are a limited number of slots
910 available and even more limited number that will fit in the L1 MMU.
911 However, using more entries will allow mapping more low memory. This
912 can be useful in optimizing the layout of kernel virtual memory.
914 Say N here unless you know what you are doing.
916 config LOWMEM_CAM_NUM
918 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
921 config DYNAMIC_MEMSTART
922 bool "Enable page aligned dynamic load address for kernel"
923 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
924 select NONSTATIC_KERNEL
926 This option enables the kernel to be loaded at any page aligned
927 physical address. The kernel creates a mapping from KERNELBASE to
928 the address where the kernel is loaded. The page size here implies
929 the TLB page size of the mapping for kernel on the particular platform.
930 Please refer to the init code for finding the TLB page size.
932 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
933 kernel image, where the only restriction is the page aligned kernel
934 load address. When this option is enabled, the compile time physical
935 address CONFIG_PHYSICAL_START is ignored.
937 This option is overridden by CONFIG_RELOCATABLE
940 bool "Build a relocatable kernel"
941 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
942 select NONSTATIC_KERNEL
944 This builds a kernel image that is capable of running at the
945 location the kernel is loaded at, without any alignment restrictions.
946 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
948 One use is for the kexec on panic case where the recovery kernel
949 must live at a different physical address than the primary
952 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
953 it has been loaded at and the compile time physical addresses
954 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
955 setting can still be useful to bootwrappers that need to know the
956 load address of the kernel (eg. u-boot/mkimage).
958 config RELOCATABLE_PPC32
960 depends on PPC32 && RELOCATABLE
962 config PAGE_OFFSET_BOOL
963 bool "Set custom page offset address"
964 depends on ADVANCED_OPTIONS
966 This option allows you to set the kernel virtual address at which
967 the kernel will map low memory. This can be useful in optimizing
968 the virtual memory layout of the system.
970 Say N here unless you know what you are doing.
973 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
976 config KERNEL_START_BOOL
977 bool "Set custom kernel base address"
978 depends on ADVANCED_OPTIONS
980 This option allows you to set the kernel virtual address at which
981 the kernel will be loaded. Normally this should match PAGE_OFFSET
982 however there are times (like kdump) that one might not want them
985 Say N here unless you know what you are doing.
988 hex "Virtual address of kernel base" if KERNEL_START_BOOL
989 default PAGE_OFFSET if PAGE_OFFSET_BOOL
990 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
993 config PHYSICAL_START_BOOL
994 bool "Set physical address where the kernel is loaded"
995 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
997 This gives the physical address where the kernel is loaded.
999 Say N here unless you know what you are doing.
1001 config PHYSICAL_START
1002 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1003 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1004 default "0x00000000"
1006 config PHYSICAL_ALIGN
1008 default "0x04000000" if FSL_BOOKE
1010 This value puts the alignment restrictions on physical address
1011 where kernel is loaded and run from. Kernel is compiled for an
1012 address which meets above alignment restriction.
1014 config TASK_SIZE_BOOL
1015 bool "Set custom user task size"
1016 depends on ADVANCED_OPTIONS
1018 This option allows you to set the amount of virtual address space
1019 allocated to user tasks. This can be useful in optimizing the
1020 virtual memory layout of the system.
1022 Say N here unless you know what you are doing.
1025 hex "Size of user task space" if TASK_SIZE_BOOL
1026 default "0x80000000" if PPC_8xx
1027 default "0xc0000000"
1029 config CONSISTENT_SIZE_BOOL
1030 bool "Set custom consistent memory pool size"
1031 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1033 This option allows you to set the size of the
1034 consistent memory pool. This pool of virtual memory
1035 is used to make consistent memory allocations.
1037 config CONSISTENT_SIZE
1038 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1039 default "0x00200000" if NOT_COHERENT_CACHE
1042 bool "Pinned Kernel TLBs (860 ONLY)"
1043 depends on ADVANCED_OPTIONS && 8xx
1048 bool "Build a relocatable kernel"
1049 depends on !COMPILE_TEST
1050 select NONSTATIC_KERNEL
1052 This builds a kernel image that is capable of running anywhere
1053 in the RMA (real memory area) at any 16k-aligned base address.
1054 The kernel is linked as a position-independent executable (PIE)
1055 and contains dynamic relocations which are processed early
1056 in the bootup process.
1058 One use is for the kexec on panic case where the recovery kernel
1059 must live at a different physical address than the primary
1062 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1065 default "0xc000000000000000"
1068 default "0xc000000000000000"
1069 config PHYSICAL_START
1071 default "0x00000000"
1077 source "net/Kconfig"
1079 source "drivers/Kconfig"
1083 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1085 source "lib/Kconfig"
1087 source "arch/powerpc/Kconfig.debug"
1089 source "security/Kconfig"
1091 source "crypto/Kconfig"
1093 config PPC_LIB_RHEAP
1096 source "arch/powerpc/kvm/Kconfig"