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_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE
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
117 select HAVE_EXIT_THREAD
119 select HAVE_DEBUG_KMEMLEAK
120 select ARCH_HAS_SG_CHAIN
121 select GENERIC_ATOMIC64 if PPC32
122 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
123 select HAVE_PERF_EVENTS
124 select HAVE_REGS_AND_STACK_ACCESS_API
125 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
126 select ARCH_WANT_IPC_PARSE_VERSION
129 select GENERIC_IRQ_SHOW
130 select GENERIC_IRQ_SHOW_LEVEL
131 select IRQ_FORCED_THREADING
132 select HAVE_RCU_TABLE_FREE if SMP
133 select HAVE_SYSCALL_TRACEPOINTS
134 select HAVE_BPF_JIT if CPU_BIG_ENDIAN
135 select HAVE_ARCH_JUMP_LABEL
136 select ARCH_HAVE_NMI_SAFE_CMPXCHG
137 select ARCH_HAS_GCOV_PROFILE_ALL
138 select GENERIC_SMP_IDLE_THREAD
139 select GENERIC_CMOS_UPDATE
140 select GENERIC_TIME_VSYSCALL_OLD
141 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC
142 select GENERIC_CLOCKEVENTS
143 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
144 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
145 select GENERIC_STRNCPY_FROM_USER
146 select GENERIC_STRNLEN_USER
147 select HAVE_MOD_ARCH_SPECIFIC
148 select MODULES_USE_ELF_RELA
149 select CLONE_BACKWARDS
150 select ARCH_USE_BUILTIN_BSWAP
151 select OLD_SIGSUSPEND
152 select OLD_SIGACTION if PPC32
153 select HAVE_DEBUG_STACKOVERFLOW
154 select HAVE_IRQ_EXIT_ON_IRQ_STACK
155 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
156 select HAVE_ARCH_AUDITSYSCALL
157 select ARCH_SUPPORTS_ATOMIC_RMW
158 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
160 select HAVE_GENERIC_RCU_GUP
161 select HAVE_PERF_EVENTS_NMI if PPC64
163 select EDAC_ATOMIC_SCRUB
164 select ARCH_HAS_DMA_SET_COHERENT_MASK
165 select HAVE_ARCH_SECCOMP_FILTER
166 select HAVE_ARCH_HARDENED_USERCOPY
168 config PPC_BARRIER_NOSPEC
171 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
174 def_bool CPU_LITTLE_ENDIAN
187 select COMPAT_BINFMT_ELF
188 select ARCH_WANT_OLD_COMPAT_IPC
189 select COMPAT_OLD_SIGACTION
191 config SYSVIPC_COMPAT
193 depends on COMPAT && SYSVIPC
196 # All PPC32s use generic nvram driver through ppc_md
201 config SCHED_OMIT_FRAME_POINTER
205 config ARCH_MAY_HAVE_PC_FDC
209 config PPC_UDBG_16550
213 config GENERIC_TBSYNC
215 default y if PPC32 && SMP
227 config SYS_SUPPORTS_APM_EMULATION
228 default y if PMAC_APM_EMU
234 Used to allow a board to specify it wants an ePAPR compliant wrapper.
237 config DEFAULT_UIMAGE
240 Used to allow a board to specify it wants a uImage built by default
243 config ARCH_HIBERNATION_POSSIBLE
247 config ARCH_SUSPEND_POSSIBLE
249 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
250 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
253 config PPC_DCR_NATIVE
263 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
266 config PPC_OF_PLATFORM_PCI
269 depends on PPC64 # not supported on 32 bits yet
272 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
273 depends on PPC32 || PPC_STD_MMU_64
276 config ARCH_SUPPORTS_UPROBES
279 config PPC_ADV_DEBUG_REGS
281 depends on 40x || BOOKE
284 config PPC_ADV_DEBUG_IACS
286 depends on PPC_ADV_DEBUG_REGS
290 config PPC_ADV_DEBUG_DACS
292 depends on PPC_ADV_DEBUG_REGS
295 config PPC_ADV_DEBUG_DVCS
297 depends on PPC_ADV_DEBUG_REGS
301 config PPC_ADV_DEBUG_DAC_RANGE
303 depends on PPC_ADV_DEBUG_REGS && 44x
306 config PPC_EMULATE_SSTEP
308 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
314 config PGTABLE_LEVELS
317 default 3 if PPC_64K_PAGES
320 source "init/Kconfig"
322 source "kernel/Kconfig.freezer"
324 source "arch/powerpc/sysdev/Kconfig"
325 source "arch/powerpc/platforms/Kconfig"
327 menu "Kernel options"
330 bool "High memory support"
333 source kernel/Kconfig.hz
334 source kernel/Kconfig.preempt
335 source "fs/Kconfig.binfmt"
337 config HUGETLB_PAGE_SIZE_VARIABLE
339 depends on HUGETLB_PAGE
342 config MATH_EMULATION
343 bool "Math emulation"
344 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
346 Some PowerPC chips designed for embedded applications do not have
347 a floating-point unit and therefore do not implement the
348 floating-point instructions in the PowerPC instruction set. If you
349 say Y here, the kernel will include code to emulate a floating-point
350 unit, which will allow programs that use floating-point
353 This is also useful to emulate missing (optional) instructions
354 such as fsqrt on cores that do have an FPU but do not implement
355 them (such as Freescale BookE).
358 prompt "Math emulation options"
359 default MATH_EMULATION_FULL
360 depends on MATH_EMULATION
362 config MATH_EMULATION_FULL
363 bool "Emulate all the floating point instructions"
365 Select this option will enable the kernel to support to emulate
366 all the floating point instructions. If your SoC doesn't have
367 a FPU, you should select this.
369 config MATH_EMULATION_HW_UNIMPLEMENTED
370 bool "Just emulate the FPU unimplemented instructions"
372 Select this if you know there does have a hardware FPU on your
373 SoC, but some floating point instructions are not implemented by that.
377 config PPC_TRANSACTIONAL_MEM
378 bool "Transactional Memory support for POWERPC"
379 depends on PPC_BOOK3S_64
385 Support user-mode Transactional Memory on POWERPC.
391 bool "SWIOTLB support"
395 Support for IO bounce buffering for systems without an IOMMU.
396 This allows us to DMA to the full physical address space on
397 platforms where the size of a physical address is larger
398 than the bus address. Not all platforms support this.
401 bool "Support for enabling/disabling CPUs"
402 depends on SMP && (PPC_PSERIES || \
403 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
405 Say Y here to be able to disable and re-enable individual
406 CPUs at runtime on SMP machines.
408 Say N if you are unsure.
410 config ARCH_CPU_PROBE_RELEASE
412 depends on HOTPLUG_CPU
414 config ARCH_ENABLE_MEMORY_HOTPLUG
417 config ARCH_HAS_WALK_MEMORY
420 config ARCH_ENABLE_MEMORY_HOTREMOVE
423 config PPC64_SUPPORTS_MEMORY_FAILURE
424 bool "Add support for memory hwpoison"
425 depends on PPC_BOOK3S_64
426 default "y" if PPC_POWERNV
427 select ARCH_SUPPORTS_MEMORY_FAILURE
430 bool "kexec system call"
431 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
434 kexec is a system call that implements the ability to shutdown your
435 current kernel, and to start another kernel. It is like a reboot
436 but it is independent of the system firmware. And like a reboot
437 you can start any kernel with it, not just Linux.
439 The name comes from the similarity to the exec system call.
441 It is an ongoing process to be certain the hardware in a machine
442 is properly shutdown, so do not be surprised if this code does not
443 initially work for you. As of this writing the exact hardware
444 interface is strongly in flux, so no good recommendation can be
448 bool "Build a kdump crash kernel"
449 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
450 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
452 Build a kernel suitable for use as a kdump capture kernel.
453 The same kernel binary can be used as production kernel and dump
457 bool "Firmware-assisted dump"
458 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
460 A robust mechanism to get reliable kernel crash dump with
461 assistance from firmware. This approach does not use kexec,
462 instead firmware assists in booting the kdump kernel
463 while preserving memory contents. Firmware-assisted dump
464 is meant to be a kdump replacement offering robustness and
465 speed not possible without system firmware assistance.
470 bool "Distribute interrupts on all CPUs by default"
473 This option gives the kernel permission to distribute IRQs across
474 multiple CPUs. Saying N here will route all IRQs to the first
475 CPU. Generally saying Y is safe, although some problems have been
476 reported with SMP Power Macintoshes with this option enabled.
481 default y if SMP && PPC_PSERIES
487 depends on NEED_MULTIPLE_NODES
489 config USE_PERCPU_NUMA_NODE_ID
493 config HAVE_MEMORYLESS_NODES
497 config ARCH_SELECT_MEMORY_MODEL
501 config ARCH_FLATMEM_ENABLE
503 depends on (PPC64 && !NUMA) || PPC32
505 config ARCH_SPARSEMEM_ENABLE
508 select SPARSEMEM_VMEMMAP_ENABLE
510 config ARCH_SPARSEMEM_DEFAULT
512 depends on (SMP && PPC_PSERIES) || PPC_PS3
514 config SYS_SUPPORTS_HUGETLBFS
519 config ARCH_MEMORY_PROBE
521 depends on MEMORY_HOTPLUG
523 # Some NUMA nodes have memory ranges that span
524 # other nodes. Even though a pfn is valid and
525 # between a node's start and end pfns, it may not
526 # reside on that node. See memmap_init_zone()
528 config NODES_SPAN_OTHER_NODES
530 depends on NEED_MULTIPLE_NODES
533 bool "Using standard binutils settings"
537 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
538 Note, that kernel will be able to run only those applications,
539 which had been compiled using binutils later than 2.17.50.0.3 with
540 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
541 the older binutils, you can patch them with a trivial patch, which
542 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
548 Select the kernel logical page size. Increasing the page size
549 will reduce software overhead at each page boundary, allow
550 hardware prefetch mechanisms to be more effective, and allow
551 larger dma transfers increasing IO efficiency and reducing
552 overhead. However the utilization of memory will increase.
553 For example, each cached file will using a multiple of the
554 page size to hold its contents and the difference between the
555 end of file and the end of page is wasted.
557 Some dedicated systems, such as software raid serving with
558 accelerated calculations, have shown significant increases.
560 If you configure a 64 bit kernel for 64k pages but the
561 processor does not support them, then the kernel will simulate
562 them with 4k pages, loading them on demand, but with the
563 reduced software overhead and larger internal fragmentation.
564 For the 32 bit kernel, a large page option will not be offered
565 unless it is supported by the configured processor.
567 If unsure, choose 4K_PAGES.
574 depends on 44x || PPC_8xx
578 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
580 config PPC_256K_PAGES
581 bool "256k page size"
582 depends on 44x && !STDBINUTILS
584 Make the page size 256k.
586 As the ELF standard only requires alignment to support page
587 sizes up to 64k, you will need to compile all of your user
588 space applications with a non-standard binutils settings
589 (see the STDBINUTILS description for details).
591 Say N unless you know what you are doing.
595 config FORCE_MAX_ZONEORDER
596 int "Maximum zone order"
597 range 9 64 if PPC64 && PPC_64K_PAGES
598 default "9" if PPC64 && PPC_64K_PAGES
599 range 13 64 if PPC64 && !PPC_64K_PAGES
600 default "13" if PPC64 && !PPC_64K_PAGES
601 range 9 64 if PPC32 && PPC_16K_PAGES
602 default "9" if PPC32 && PPC_16K_PAGES
603 range 7 64 if PPC32 && PPC_64K_PAGES
604 default "7" if PPC32 && PPC_64K_PAGES
605 range 5 64 if PPC32 && PPC_256K_PAGES
606 default "5" if PPC32 && PPC_256K_PAGES
610 The kernel memory allocator divides physically contiguous memory
611 blocks into "zones", where each zone is a power of two number of
612 pages. This option selects the largest power of two that the kernel
613 keeps in the memory allocator. If you need to allocate very large
614 blocks of physically contiguous memory, then you may need to
617 This config option is actually maximum order plus one. For example,
618 a value of 11 means that the largest free memory block is 2^10 pages.
620 The page size is not necessarily 4KB. For example, on 64-bit
621 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
622 this in mind when choosing a value for this option.
624 config PPC_SUBPAGE_PROT
625 bool "Support setting protections for 4k subpages"
626 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
628 This option adds support for a system call to allow user programs
629 to set access permissions (read/write, readonly, or no access)
630 on the 4k subpages of each 64k page.
632 config PPC_COPRO_BASE
637 bool "SMT (Hyperthreading) scheduler support"
638 depends on PPC64 && SMP
640 SMT scheduler support improves the CPU scheduler's decision making
641 when dealing with POWER5 cpus at a cost of slightly increased
642 overhead in some places. If unsure say N here.
644 config PPC_DENORMALISATION
645 bool "PowerPC denormalisation exception handling"
646 depends on PPC_BOOK3S_64
647 default "y" if PPC_POWERNV
649 Add support for handling denormalisation of single precision
650 values. Useful for bare metal only. If unsure say Y here.
653 bool "Default bootloader kernel arguments"
656 string "Initial kernel command string"
657 depends on CMDLINE_BOOL
658 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
660 On some platforms, there is currently no way for the boot loader to
661 pass arguments to the kernel. For these platforms, you can supply
662 some command-line options at build time by entering them here. In
663 most cases you will need to specify the root device here.
666 bool "Always use the default kernel command string"
667 depends on CMDLINE_BOOL
669 Always use the default kernel command string, even if the boot
670 loader passes other arguments to the kernel.
671 This is useful if you cannot or don't want to change the
672 command-line options your boot loader passes to the kernel.
675 string "Additional default image types"
677 List additional targets to be built by the bootwrapper here (separated
678 by spaces). This is useful for targets that depend of device tree
679 files in the .dts directory.
681 Targets in this list will be build as part of the default build
682 target, or when the user does a 'make zImage' or a
683 'make zImage.initrd'.
685 If unsure, leave blank
687 config ARCH_WANTS_FREEZER_CONTROL
691 source kernel/power/Kconfig
694 bool "Enable seccomp to safely compute untrusted bytecode"
698 This kernel feature is useful for number crunching applications
699 that may need to compute untrusted bytecode during their
700 execution. By using pipes or other transports made available to
701 the process as file descriptors supporting the read/write
702 syscalls, it's possible to isolate those applications in
703 their own address space using seccomp. Once seccomp is
704 enabled via /proc/<pid>/seccomp, it cannot be disabled
705 and the task is only allowed to execute a few safe syscalls
706 defined by each seccomp mode.
708 If unsure, say Y. Only embedded should say N here.
719 bool "Support for ISA-bus hardware"
723 Find out whether you have ISA slots on your motherboard. ISA is the
724 name of a bus system, i.e. the way the CPU talks to the other stuff
725 inside your box. If you have an Apple machine, say N here; if you
726 have an IBM RS/6000 or pSeries machine, say Y. If you have an
727 embedded board, consult your board documentation.
733 config NEED_DMA_MAP_STATE
734 def_bool (PPC64 || NOT_COHERENT_CACHE)
736 config NEED_SG_DMA_LENGTH
739 config GENERIC_ISA_DMA
741 depends on ISA_DMA_API
744 config PPC_INDIRECT_PCI
747 default y if 40x || 44x
761 select PPC_INDIRECT_PCI
767 depends on SUSPEND && (PPC_85xx || PPC_86xx)
769 Freescale MPC85xx/MPC86xx power management controller support
770 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
775 depends on SUSPEND && (44x || 40x)
777 PPC4xx Clock Power Management (CPM) support (suspend/resume).
778 It also enables support for two different idle states (idle-wait
785 bool "Freescale Local Bus support"
788 Enables reporting of errors from the Freescale local bus
789 controller. Also contains some common code used by
790 drivers for specific local bus peripherals.
794 depends on PPC_83xx || QUICC_ENGINE || CPM2
796 Freescale General-purpose Timers support
798 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
802 # Platforms that what PCI turned unconditionally just do select PCI
803 # in their config node. Platforms that want to choose at config
804 # time should select PPC_PCI_CHOICE
805 config PPC_PCI_CHOICE
809 bool "PCI support" if PPC_PCI_CHOICE
810 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
811 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
812 default PCI_QSPAN if !4xx && !CPM2 && 8xx
813 select GENERIC_PCI_IOMAP
815 Find out whether your system includes a PCI bus. PCI is the name of
816 a bus system, i.e. the way the CPU talks to the other stuff inside
817 your box. If you say Y here, the kernel will include drivers and
818 infrastructure code to support PCI bus devices.
828 depends on !4xx && !CPM2 && 8xx
831 Say Y here if you have a system based on a Motorola 8xx-series
832 embedded processor with a QSPAN PCI interface, otherwise say N.
836 depends on PCI && 8260
837 select PPC_INDIRECT_PCI
840 source "drivers/pci/pcie/Kconfig"
842 source "drivers/pci/Kconfig"
844 source "drivers/pcmcia/Kconfig"
846 source "drivers/pci/hotplug/Kconfig"
853 tristate "RapidIO support"
854 depends on HAS_RAPIDIO || PCI
856 If you say Y here, the kernel will include drivers and
857 infrastructure code to support RapidIO interconnect devices.
860 bool "Freescale Embedded SRIO Controller support"
861 depends on RAPIDIO = y && HAS_RAPIDIO
864 Include support for RapidIO controller on Freescale embedded
865 processors (MPC8548, MPC8641, etc).
867 source "drivers/rapidio/Kconfig"
871 config NONSTATIC_KERNEL
875 menu "Advanced setup"
878 config ADVANCED_OPTIONS
879 bool "Prompt for advanced kernel configuration options"
881 This option will enable prompting for a variety of advanced kernel
882 configuration options. These options can cause the kernel to not
883 work if they are set incorrectly, but can be used to optimize certain
884 aspects of kernel memory management.
886 Unless you know what you are doing, say N here.
888 comment "Default settings for advanced configuration options are used"
889 depends on !ADVANCED_OPTIONS
891 config LOWMEM_SIZE_BOOL
892 bool "Set maximum low memory"
893 depends on ADVANCED_OPTIONS
895 This option allows you to set the maximum amount of memory which
896 will be used as "low memory", that is, memory which the kernel can
897 access directly, without having to set up a kernel virtual mapping.
898 This can be useful in optimizing the layout of kernel virtual
901 Say N here unless you know what you are doing.
904 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
907 config LOWMEM_CAM_NUM_BOOL
908 bool "Set number of CAMs to use to map low memory"
909 depends on ADVANCED_OPTIONS && FSL_BOOKE
911 This option allows you to set the maximum number of CAM slots that
912 will be used to map low memory. There are a limited number of slots
913 available and even more limited number that will fit in the L1 MMU.
914 However, using more entries will allow mapping more low memory. This
915 can be useful in optimizing the layout of kernel virtual memory.
917 Say N here unless you know what you are doing.
919 config LOWMEM_CAM_NUM
921 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
924 config DYNAMIC_MEMSTART
925 bool "Enable page aligned dynamic load address for kernel"
926 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
927 select NONSTATIC_KERNEL
929 This option enables the kernel to be loaded at any page aligned
930 physical address. The kernel creates a mapping from KERNELBASE to
931 the address where the kernel is loaded. The page size here implies
932 the TLB page size of the mapping for kernel on the particular platform.
933 Please refer to the init code for finding the TLB page size.
935 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
936 kernel image, where the only restriction is the page aligned kernel
937 load address. When this option is enabled, the compile time physical
938 address CONFIG_PHYSICAL_START is ignored.
940 This option is overridden by CONFIG_RELOCATABLE
943 bool "Build a relocatable kernel"
944 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
945 select NONSTATIC_KERNEL
947 This builds a kernel image that is capable of running at the
948 location the kernel is loaded at, without any alignment restrictions.
949 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
951 One use is for the kexec on panic case where the recovery kernel
952 must live at a different physical address than the primary
955 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
956 it has been loaded at and the compile time physical addresses
957 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
958 setting can still be useful to bootwrappers that need to know the
959 load address of the kernel (eg. u-boot/mkimage).
961 config RELOCATABLE_PPC32
963 depends on PPC32 && RELOCATABLE
965 config PAGE_OFFSET_BOOL
966 bool "Set custom page offset address"
967 depends on ADVANCED_OPTIONS
969 This option allows you to set the kernel virtual address at which
970 the kernel will map low memory. This can be useful in optimizing
971 the virtual memory layout of the system.
973 Say N here unless you know what you are doing.
976 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
979 config KERNEL_START_BOOL
980 bool "Set custom kernel base address"
981 depends on ADVANCED_OPTIONS
983 This option allows you to set the kernel virtual address at which
984 the kernel will be loaded. Normally this should match PAGE_OFFSET
985 however there are times (like kdump) that one might not want them
988 Say N here unless you know what you are doing.
991 hex "Virtual address of kernel base" if KERNEL_START_BOOL
992 default PAGE_OFFSET if PAGE_OFFSET_BOOL
993 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
996 config PHYSICAL_START_BOOL
997 bool "Set physical address where the kernel is loaded"
998 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1000 This gives the physical address where the kernel is loaded.
1002 Say N here unless you know what you are doing.
1004 config PHYSICAL_START
1005 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1006 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1007 default "0x00000000"
1009 config PHYSICAL_ALIGN
1011 default "0x04000000" if FSL_BOOKE
1013 This value puts the alignment restrictions on physical address
1014 where kernel is loaded and run from. Kernel is compiled for an
1015 address which meets above alignment restriction.
1017 config TASK_SIZE_BOOL
1018 bool "Set custom user task size"
1019 depends on ADVANCED_OPTIONS
1021 This option allows you to set the amount of virtual address space
1022 allocated to user tasks. This can be useful in optimizing the
1023 virtual memory layout of the system.
1025 Say N here unless you know what you are doing.
1028 hex "Size of user task space" if TASK_SIZE_BOOL
1029 default "0x80000000" if PPC_8xx
1030 default "0xc0000000"
1032 config CONSISTENT_SIZE_BOOL
1033 bool "Set custom consistent memory pool size"
1034 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1036 This option allows you to set the size of the
1037 consistent memory pool. This pool of virtual memory
1038 is used to make consistent memory allocations.
1040 config CONSISTENT_SIZE
1041 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1042 default "0x00200000" if NOT_COHERENT_CACHE
1045 bool "Pinned Kernel TLBs (860 ONLY)"
1046 depends on ADVANCED_OPTIONS && 8xx
1051 bool "Build a relocatable kernel"
1052 depends on !COMPILE_TEST
1053 select NONSTATIC_KERNEL
1055 This builds a kernel image that is capable of running anywhere
1056 in the RMA (real memory area) at any 16k-aligned base address.
1057 The kernel is linked as a position-independent executable (PIE)
1058 and contains dynamic relocations which are processed early
1059 in the bootup process.
1061 One use is for the kexec on panic case where the recovery kernel
1062 must live at a different physical address than the primary
1065 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1068 default "0xc000000000000000"
1071 default "0xc000000000000000"
1072 config PHYSICAL_START
1074 default "0x00000000"
1080 source "net/Kconfig"
1082 source "drivers/Kconfig"
1086 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1088 source "lib/Kconfig"
1090 source "arch/powerpc/Kconfig.debug"
1092 source "security/Kconfig"
1094 source "crypto/Kconfig"
1096 config PPC_LIB_RHEAP
1099 source "arch/powerpc/kvm/Kconfig"