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
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
133 select HAVE_BPF_JIT if CPU_BIG_ENDIAN
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_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC
141 select GENERIC_CLOCKEVENTS
142 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
143 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
144 select GENERIC_STRNCPY_FROM_USER
145 select GENERIC_STRNLEN_USER
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
166 config PPC_BARRIER_NOSPEC
169 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
172 def_bool CPU_LITTLE_ENDIAN
185 select COMPAT_BINFMT_ELF
186 select ARCH_WANT_OLD_COMPAT_IPC
187 select COMPAT_OLD_SIGACTION
189 config SYSVIPC_COMPAT
191 depends on COMPAT && SYSVIPC
194 # All PPC32s use generic nvram driver through ppc_md
199 config SCHED_OMIT_FRAME_POINTER
203 config ARCH_MAY_HAVE_PC_FDC
207 config PPC_UDBG_16550
211 config GENERIC_TBSYNC
213 default y if PPC32 && SMP
225 config SYS_SUPPORTS_APM_EMULATION
226 default y if PMAC_APM_EMU
232 Used to allow a board to specify it wants an ePAPR compliant wrapper.
235 config DEFAULT_UIMAGE
238 Used to allow a board to specify it wants a uImage built by default
241 config ARCH_HIBERNATION_POSSIBLE
245 config ARCH_SUSPEND_POSSIBLE
247 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
248 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
251 config PPC_DCR_NATIVE
261 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
264 config PPC_OF_PLATFORM_PCI
267 depends on PPC64 # not supported on 32 bits yet
270 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
271 depends on PPC32 || PPC_STD_MMU_64
274 config ARCH_SUPPORTS_UPROBES
277 config PPC_ADV_DEBUG_REGS
279 depends on 40x || BOOKE
282 config PPC_ADV_DEBUG_IACS
284 depends on PPC_ADV_DEBUG_REGS
288 config PPC_ADV_DEBUG_DACS
290 depends on PPC_ADV_DEBUG_REGS
293 config PPC_ADV_DEBUG_DVCS
295 depends on PPC_ADV_DEBUG_REGS
299 config PPC_ADV_DEBUG_DAC_RANGE
301 depends on PPC_ADV_DEBUG_REGS && 44x
304 config PPC_EMULATE_SSTEP
306 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
312 config PGTABLE_LEVELS
315 default 3 if PPC_64K_PAGES
318 source "init/Kconfig"
320 source "kernel/Kconfig.freezer"
322 source "arch/powerpc/sysdev/Kconfig"
323 source "arch/powerpc/platforms/Kconfig"
325 menu "Kernel options"
328 bool "High memory support"
331 source kernel/Kconfig.hz
332 source kernel/Kconfig.preempt
333 source "fs/Kconfig.binfmt"
335 config HUGETLB_PAGE_SIZE_VARIABLE
337 depends on HUGETLB_PAGE
340 config MATH_EMULATION
341 bool "Math emulation"
342 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
344 Some PowerPC chips designed for embedded applications do not have
345 a floating-point unit and therefore do not implement the
346 floating-point instructions in the PowerPC instruction set. If you
347 say Y here, the kernel will include code to emulate a floating-point
348 unit, which will allow programs that use floating-point
351 This is also useful to emulate missing (optional) instructions
352 such as fsqrt on cores that do have an FPU but do not implement
353 them (such as Freescale BookE).
356 prompt "Math emulation options"
357 default MATH_EMULATION_FULL
358 depends on MATH_EMULATION
360 config MATH_EMULATION_FULL
361 bool "Emulate all the floating point instructions"
363 Select this option will enable the kernel to support to emulate
364 all the floating point instructions. If your SoC doesn't have
365 a FPU, you should select this.
367 config MATH_EMULATION_HW_UNIMPLEMENTED
368 bool "Just emulate the FPU unimplemented instructions"
370 Select this if you know there does have a hardware FPU on your
371 SoC, but some floating point instructions are not implemented by that.
375 config PPC_TRANSACTIONAL_MEM
376 bool "Transactional Memory support for POWERPC"
377 depends on PPC_BOOK3S_64
383 Support user-mode Transactional Memory on POWERPC.
389 bool "SWIOTLB support"
393 Support for IO bounce buffering for systems without an IOMMU.
394 This allows us to DMA to the full physical address space on
395 platforms where the size of a physical address is larger
396 than the bus address. Not all platforms support this.
399 bool "Support for enabling/disabling CPUs"
400 depends on SMP && (PPC_PSERIES || \
401 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
403 Say Y here to be able to disable and re-enable individual
404 CPUs at runtime on SMP machines.
406 Say N if you are unsure.
408 config ARCH_CPU_PROBE_RELEASE
410 depends on HOTPLUG_CPU
412 config ARCH_ENABLE_MEMORY_HOTPLUG
415 config ARCH_HAS_WALK_MEMORY
418 config ARCH_ENABLE_MEMORY_HOTREMOVE
421 config PPC64_SUPPORTS_MEMORY_FAILURE
422 bool "Add support for memory hwpoison"
423 depends on PPC_BOOK3S_64
424 default "y" if PPC_POWERNV
425 select ARCH_SUPPORTS_MEMORY_FAILURE
428 bool "kexec system call"
429 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
432 kexec is a system call that implements the ability to shutdown your
433 current kernel, and to start another kernel. It is like a reboot
434 but it is independent of the system firmware. And like a reboot
435 you can start any kernel with it, not just Linux.
437 The name comes from the similarity to the exec system call.
439 It is an ongoing process to be certain the hardware in a machine
440 is properly shutdown, so do not be surprised if this code does not
441 initially work for you. As of this writing the exact hardware
442 interface is strongly in flux, so no good recommendation can be
446 bool "Build a kdump crash kernel"
447 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
448 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
450 Build a kernel suitable for use as a kdump capture kernel.
451 The same kernel binary can be used as production kernel and dump
455 bool "Firmware-assisted dump"
456 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
458 A robust mechanism to get reliable kernel crash dump with
459 assistance from firmware. This approach does not use kexec,
460 instead firmware assists in booting the kdump kernel
461 while preserving memory contents. Firmware-assisted dump
462 is meant to be a kdump replacement offering robustness and
463 speed not possible without system firmware assistance.
468 bool "Distribute interrupts on all CPUs by default"
471 This option gives the kernel permission to distribute IRQs across
472 multiple CPUs. Saying N here will route all IRQs to the first
473 CPU. Generally saying Y is safe, although some problems have been
474 reported with SMP Power Macintoshes with this option enabled.
479 default y if SMP && PPC_PSERIES
485 depends on NEED_MULTIPLE_NODES
487 config USE_PERCPU_NUMA_NODE_ID
491 config HAVE_MEMORYLESS_NODES
495 config ARCH_SELECT_MEMORY_MODEL
499 config ARCH_FLATMEM_ENABLE
501 depends on (PPC64 && !NUMA) || PPC32
503 config ARCH_SPARSEMEM_ENABLE
506 select SPARSEMEM_VMEMMAP_ENABLE
508 config ARCH_SPARSEMEM_DEFAULT
510 depends on (SMP && PPC_PSERIES) || PPC_PS3
512 config SYS_SUPPORTS_HUGETLBFS
517 config ARCH_MEMORY_PROBE
519 depends on MEMORY_HOTPLUG
521 # Some NUMA nodes have memory ranges that span
522 # other nodes. Even though a pfn is valid and
523 # between a node's start and end pfns, it may not
524 # reside on that node. See memmap_init_zone()
526 config NODES_SPAN_OTHER_NODES
528 depends on NEED_MULTIPLE_NODES
531 bool "Using standard binutils settings"
535 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
536 Note, that kernel will be able to run only those applications,
537 which had been compiled using binutils later than 2.17.50.0.3 with
538 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
539 the older binutils, you can patch them with a trivial patch, which
540 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
546 Select the kernel logical page size. Increasing the page size
547 will reduce software overhead at each page boundary, allow
548 hardware prefetch mechanisms to be more effective, and allow
549 larger dma transfers increasing IO efficiency and reducing
550 overhead. However the utilization of memory will increase.
551 For example, each cached file will using a multiple of the
552 page size to hold its contents and the difference between the
553 end of file and the end of page is wasted.
555 Some dedicated systems, such as software raid serving with
556 accelerated calculations, have shown significant increases.
558 If you configure a 64 bit kernel for 64k pages but the
559 processor does not support them, then the kernel will simulate
560 them with 4k pages, loading them on demand, but with the
561 reduced software overhead and larger internal fragmentation.
562 For the 32 bit kernel, a large page option will not be offered
563 unless it is supported by the configured processor.
565 If unsure, choose 4K_PAGES.
572 depends on 44x || PPC_8xx
576 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
578 config PPC_256K_PAGES
579 bool "256k page size"
580 depends on 44x && !STDBINUTILS && !PPC_47x
582 Make the page size 256k.
584 As the ELF standard only requires alignment to support page
585 sizes up to 64k, you will need to compile all of your user
586 space applications with a non-standard binutils settings
587 (see the STDBINUTILS description for details).
589 Say N unless you know what you are doing.
593 config FORCE_MAX_ZONEORDER
594 int "Maximum zone order"
595 range 9 64 if PPC64 && PPC_64K_PAGES
596 default "9" if PPC64 && PPC_64K_PAGES
597 range 13 64 if PPC64 && !PPC_64K_PAGES
598 default "13" if PPC64 && !PPC_64K_PAGES
599 range 9 64 if PPC32 && PPC_16K_PAGES
600 default "9" if PPC32 && PPC_16K_PAGES
601 range 7 64 if PPC32 && PPC_64K_PAGES
602 default "7" if PPC32 && PPC_64K_PAGES
603 range 5 64 if PPC32 && PPC_256K_PAGES
604 default "5" if PPC32 && PPC_256K_PAGES
608 The kernel memory allocator divides physically contiguous memory
609 blocks into "zones", where each zone is a power of two number of
610 pages. This option selects the largest power of two that the kernel
611 keeps in the memory allocator. If you need to allocate very large
612 blocks of physically contiguous memory, then you may need to
615 This config option is actually maximum order plus one. For example,
616 a value of 11 means that the largest free memory block is 2^10 pages.
618 The page size is not necessarily 4KB. For example, on 64-bit
619 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
620 this in mind when choosing a value for this option.
622 config PPC_SUBPAGE_PROT
623 bool "Support setting protections for 4k subpages"
624 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
626 This option adds support for a system call to allow user programs
627 to set access permissions (read/write, readonly, or no access)
628 on the 4k subpages of each 64k page.
630 config PPC_COPRO_BASE
635 bool "SMT (Hyperthreading) scheduler support"
636 depends on PPC64 && SMP
638 SMT scheduler support improves the CPU scheduler's decision making
639 when dealing with POWER5 cpus at a cost of slightly increased
640 overhead in some places. If unsure say N here.
642 config PPC_DENORMALISATION
643 bool "PowerPC denormalisation exception handling"
644 depends on PPC_BOOK3S_64
645 default "y" if PPC_POWERNV
647 Add support for handling denormalisation of single precision
648 values. Useful for bare metal only. If unsure say Y here.
651 bool "Default bootloader kernel arguments"
654 string "Initial kernel command string"
655 depends on CMDLINE_BOOL
656 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
658 On some platforms, there is currently no way for the boot loader to
659 pass arguments to the kernel. For these platforms, you can supply
660 some command-line options at build time by entering them here. In
661 most cases you will need to specify the root device here.
664 bool "Always use the default kernel command string"
665 depends on CMDLINE_BOOL
667 Always use the default kernel command string, even if the boot
668 loader passes other arguments to the kernel.
669 This is useful if you cannot or don't want to change the
670 command-line options your boot loader passes to the kernel.
673 string "Additional default image types"
675 List additional targets to be built by the bootwrapper here (separated
676 by spaces). This is useful for targets that depend of device tree
677 files in the .dts directory.
679 Targets in this list will be build as part of the default build
680 target, or when the user does a 'make zImage' or a
681 'make zImage.initrd'.
683 If unsure, leave blank
685 config ARCH_WANTS_FREEZER_CONTROL
689 source kernel/power/Kconfig
692 bool "Enable seccomp to safely compute untrusted bytecode"
696 This kernel feature is useful for number crunching applications
697 that may need to compute untrusted bytecode during their
698 execution. By using pipes or other transports made available to
699 the process as file descriptors supporting the read/write
700 syscalls, it's possible to isolate those applications in
701 their own address space using seccomp. Once seccomp is
702 enabled via /proc/<pid>/seccomp, it cannot be disabled
703 and the task is only allowed to execute a few safe syscalls
704 defined by each seccomp mode.
706 If unsure, say Y. Only embedded should say N here.
717 bool "Support for ISA-bus hardware"
721 Find out whether you have ISA slots on your motherboard. ISA is the
722 name of a bus system, i.e. the way the CPU talks to the other stuff
723 inside your box. If you have an Apple machine, say N here; if you
724 have an IBM RS/6000 or pSeries machine, say Y. If you have an
725 embedded board, consult your board documentation.
731 config NEED_DMA_MAP_STATE
732 def_bool (PPC64 || NOT_COHERENT_CACHE)
734 config NEED_SG_DMA_LENGTH
737 config GENERIC_ISA_DMA
739 depends on ISA_DMA_API
742 config PPC_INDIRECT_PCI
745 default y if 40x || 44x
759 select PPC_INDIRECT_PCI
765 depends on SUSPEND && (PPC_85xx || PPC_86xx)
767 Freescale MPC85xx/MPC86xx power management controller support
768 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
773 depends on SUSPEND && (44x || 40x)
775 PPC4xx Clock Power Management (CPM) support (suspend/resume).
776 It also enables support for two different idle states (idle-wait
783 bool "Freescale Local Bus support"
786 Enables reporting of errors from the Freescale local bus
787 controller. Also contains some common code used by
788 drivers for specific local bus peripherals.
792 depends on PPC_83xx || QUICC_ENGINE || CPM2
794 Freescale General-purpose Timers support
796 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
800 # Platforms that what PCI turned unconditionally just do select PCI
801 # in their config node. Platforms that want to choose at config
802 # time should select PPC_PCI_CHOICE
803 config PPC_PCI_CHOICE
807 bool "PCI support" if PPC_PCI_CHOICE
808 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
809 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
810 default PCI_QSPAN if !4xx && !CPM2 && 8xx
811 select GENERIC_PCI_IOMAP
813 Find out whether your system includes a PCI bus. PCI is the name of
814 a bus system, i.e. the way the CPU talks to the other stuff inside
815 your box. If you say Y here, the kernel will include drivers and
816 infrastructure code to support PCI bus devices.
826 depends on !4xx && !CPM2 && 8xx
829 Say Y here if you have a system based on a Motorola 8xx-series
830 embedded processor with a QSPAN PCI interface, otherwise say N.
834 depends on PCI && 8260
835 select PPC_INDIRECT_PCI
838 source "drivers/pci/pcie/Kconfig"
840 source "drivers/pci/Kconfig"
842 source "drivers/pcmcia/Kconfig"
844 source "drivers/pci/hotplug/Kconfig"
851 tristate "RapidIO support"
852 depends on HAS_RAPIDIO || PCI
854 If you say Y here, the kernel will include drivers and
855 infrastructure code to support RapidIO interconnect devices.
858 bool "Freescale Embedded SRIO Controller support"
859 depends on RAPIDIO = y && HAS_RAPIDIO
862 Include support for RapidIO controller on Freescale embedded
863 processors (MPC8548, MPC8641, etc).
865 source "drivers/rapidio/Kconfig"
869 config NONSTATIC_KERNEL
873 menu "Advanced setup"
876 config ADVANCED_OPTIONS
877 bool "Prompt for advanced kernel configuration options"
879 This option will enable prompting for a variety of advanced kernel
880 configuration options. These options can cause the kernel to not
881 work if they are set incorrectly, but can be used to optimize certain
882 aspects of kernel memory management.
884 Unless you know what you are doing, say N here.
886 comment "Default settings for advanced configuration options are used"
887 depends on !ADVANCED_OPTIONS
889 config LOWMEM_SIZE_BOOL
890 bool "Set maximum low memory"
891 depends on ADVANCED_OPTIONS
893 This option allows you to set the maximum amount of memory which
894 will be used as "low memory", that is, memory which the kernel can
895 access directly, without having to set up a kernel virtual mapping.
896 This can be useful in optimizing the layout of kernel virtual
899 Say N here unless you know what you are doing.
902 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
905 config LOWMEM_CAM_NUM_BOOL
906 bool "Set number of CAMs to use to map low memory"
907 depends on ADVANCED_OPTIONS && FSL_BOOKE
909 This option allows you to set the maximum number of CAM slots that
910 will be used to map low memory. There are a limited number of slots
911 available and even more limited number that will fit in the L1 MMU.
912 However, using more entries will allow mapping more low memory. This
913 can be useful in optimizing the layout of kernel virtual memory.
915 Say N here unless you know what you are doing.
917 config LOWMEM_CAM_NUM
919 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
922 config DYNAMIC_MEMSTART
923 bool "Enable page aligned dynamic load address for kernel"
924 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
925 select NONSTATIC_KERNEL
927 This option enables the kernel to be loaded at any page aligned
928 physical address. The kernel creates a mapping from KERNELBASE to
929 the address where the kernel is loaded. The page size here implies
930 the TLB page size of the mapping for kernel on the particular platform.
931 Please refer to the init code for finding the TLB page size.
933 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
934 kernel image, where the only restriction is the page aligned kernel
935 load address. When this option is enabled, the compile time physical
936 address CONFIG_PHYSICAL_START is ignored.
938 This option is overridden by CONFIG_RELOCATABLE
941 bool "Build a relocatable kernel"
942 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
943 select NONSTATIC_KERNEL
945 This builds a kernel image that is capable of running at the
946 location the kernel is loaded at, without any alignment restrictions.
947 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
949 One use is for the kexec on panic case where the recovery kernel
950 must live at a different physical address than the primary
953 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
954 it has been loaded at and the compile time physical addresses
955 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
956 setting can still be useful to bootwrappers that need to know the
957 load address of the kernel (eg. u-boot/mkimage).
959 config RELOCATABLE_PPC32
961 depends on PPC32 && RELOCATABLE
963 config PAGE_OFFSET_BOOL
964 bool "Set custom page offset address"
965 depends on ADVANCED_OPTIONS
967 This option allows you to set the kernel virtual address at which
968 the kernel will map low memory. This can be useful in optimizing
969 the virtual memory layout of the system.
971 Say N here unless you know what you are doing.
974 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
977 config KERNEL_START_BOOL
978 bool "Set custom kernel base address"
979 depends on ADVANCED_OPTIONS
981 This option allows you to set the kernel virtual address at which
982 the kernel will be loaded. Normally this should match PAGE_OFFSET
983 however there are times (like kdump) that one might not want them
986 Say N here unless you know what you are doing.
989 hex "Virtual address of kernel base" if KERNEL_START_BOOL
990 default PAGE_OFFSET if PAGE_OFFSET_BOOL
991 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
994 config PHYSICAL_START_BOOL
995 bool "Set physical address where the kernel is loaded"
996 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
998 This gives the physical address where the kernel is loaded.
1000 Say N here unless you know what you are doing.
1002 config PHYSICAL_START
1003 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1004 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1005 default "0x00000000"
1007 config PHYSICAL_ALIGN
1009 default "0x04000000" if FSL_BOOKE
1011 This value puts the alignment restrictions on physical address
1012 where kernel is loaded and run from. Kernel is compiled for an
1013 address which meets above alignment restriction.
1015 config TASK_SIZE_BOOL
1016 bool "Set custom user task size"
1017 depends on ADVANCED_OPTIONS
1019 This option allows you to set the amount of virtual address space
1020 allocated to user tasks. This can be useful in optimizing the
1021 virtual memory layout of the system.
1023 Say N here unless you know what you are doing.
1026 hex "Size of user task space" if TASK_SIZE_BOOL
1027 default "0x80000000" if PPC_8xx
1028 default "0xc0000000"
1030 config CONSISTENT_SIZE_BOOL
1031 bool "Set custom consistent memory pool size"
1032 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1034 This option allows you to set the size of the
1035 consistent memory pool. This pool of virtual memory
1036 is used to make consistent memory allocations.
1038 config CONSISTENT_SIZE
1039 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1040 default "0x00200000" if NOT_COHERENT_CACHE
1043 bool "Pinned Kernel TLBs (860 ONLY)"
1044 depends on ADVANCED_OPTIONS && 8xx
1049 bool "Build a relocatable kernel"
1050 depends on !COMPILE_TEST
1051 select NONSTATIC_KERNEL
1053 This builds a kernel image that is capable of running anywhere
1054 in the RMA (real memory area) at any 16k-aligned base address.
1055 The kernel is linked as a position-independent executable (PIE)
1056 and contains dynamic relocations which are processed early
1057 in the bootup process.
1059 One use is for the kexec on panic case where the recovery kernel
1060 must live at a different physical address than the primary
1063 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1066 default "0xc000000000000000"
1069 default "0xc000000000000000"
1070 config PHYSICAL_START
1072 default "0x00000000"
1078 source "net/Kconfig"
1080 source "drivers/Kconfig"
1084 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1086 source "lib/Kconfig"
1088 source "arch/powerpc/Kconfig.debug"
1090 source "security/Kconfig"
1092 source "crypto/Kconfig"
1094 config PPC_LIB_RHEAP
1097 source "arch/powerpc/kvm/Kconfig"