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 TRACE_IRQFLAGS_SUPPORT
54 config LOCKDEP_SUPPORT
58 config RWSEM_GENERIC_SPINLOCK
61 config RWSEM_XCHGADD_ALGORITHM
65 config GENERIC_LOCKBREAK
68 depends on SMP && PREEMPT
70 config ARCH_HAS_ILOG2_U32
74 config ARCH_HAS_ILOG2_U64
78 config GENERIC_HWEIGHT
82 config ARCH_HAS_DMA_SET_COHERENT_MASK
88 select ARCH_MIGHT_HAVE_PC_PARPORT
89 select ARCH_MIGHT_HAVE_PC_SERIO
91 select ARCH_HAS_ELF_RANDOMIZE
93 select OF_EARLY_FLATTREE
94 select OF_RESERVED_MEM
95 select HAVE_FTRACE_MCOUNT_RECORD
96 select HAVE_DYNAMIC_FTRACE
97 select HAVE_FUNCTION_TRACER
98 select HAVE_FUNCTION_GRAPH_TRACER
99 select SYSCTL_EXCEPTION_TRACE
100 select ARCH_WANT_OPTIONAL_GPIOLIB
101 select VIRT_TO_BUS if !PPC64
103 select HAVE_IOREMAP_PROT
104 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
106 select HAVE_ARCH_KGDB
107 select HAVE_KRETPROBES
108 select HAVE_ARCH_TRACEHOOK
110 select HAVE_MEMBLOCK_NODE_MAP
111 select HAVE_DMA_API_DEBUG
113 select HAVE_DEBUG_KMEMLEAK
114 select ARCH_HAS_SG_CHAIN
115 select GENERIC_ATOMIC64 if PPC32
116 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
117 select HAVE_PERF_EVENTS
118 select HAVE_REGS_AND_STACK_ACCESS_API
119 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
120 select ARCH_WANT_IPC_PARSE_VERSION
123 select GENERIC_IRQ_SHOW
124 select GENERIC_IRQ_SHOW_LEVEL
125 select IRQ_FORCED_THREADING
126 select HAVE_RCU_TABLE_FREE if SMP
127 select HAVE_SYSCALL_TRACEPOINTS
129 select HAVE_ARCH_JUMP_LABEL
130 select ARCH_HAVE_NMI_SAFE_CMPXCHG
131 select ARCH_HAS_GCOV_PROFILE_ALL
132 select GENERIC_SMP_IDLE_THREAD
133 select GENERIC_CMOS_UPDATE
134 select GENERIC_TIME_VSYSCALL_OLD
135 select GENERIC_CLOCKEVENTS
136 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
137 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
138 select GENERIC_STRNCPY_FROM_USER
139 select GENERIC_STRNLEN_USER
140 select HAVE_MOD_ARCH_SPECIFIC
141 select MODULES_USE_ELF_RELA
142 select CLONE_BACKWARDS
143 select ARCH_USE_BUILTIN_BSWAP
144 select OLD_SIGSUSPEND
145 select OLD_SIGACTION if PPC32
146 select HAVE_DEBUG_STACKOVERFLOW
147 select HAVE_IRQ_EXIT_ON_IRQ_STACK
148 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
149 select HAVE_ARCH_AUDITSYSCALL
150 select ARCH_SUPPORTS_ATOMIC_RMW
151 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
153 select HAVE_GENERIC_RCU_GUP
154 select HAVE_PERF_EVENTS_NMI if PPC64
156 select EDAC_ATOMIC_SCRUB
157 select ARCH_HAS_DMA_SET_COHERENT_MASK
158 select ARCH_HAS_DEVMEM_IS_ALLOWED
159 select HAVE_ARCH_SECCOMP_FILTER
160 select ARCH_HAS_UBSAN_SANITIZE_ALL
163 def_bool CPU_LITTLE_ENDIAN
176 select COMPAT_BINFMT_ELF
177 select ARCH_WANT_OLD_COMPAT_IPC
178 select COMPAT_OLD_SIGACTION
180 config SYSVIPC_COMPAT
182 depends on COMPAT && SYSVIPC
185 # All PPC32s use generic nvram driver through ppc_md
190 config SCHED_OMIT_FRAME_POINTER
194 config ARCH_MAY_HAVE_PC_FDC
198 config PPC_UDBG_16550
202 config GENERIC_TBSYNC
204 default y if PPC32 && SMP
216 config SYS_SUPPORTS_APM_EMULATION
217 default y if PMAC_APM_EMU
223 Used to allow a board to specify it wants an ePAPR compliant wrapper.
226 config DEFAULT_UIMAGE
229 Used to allow a board to specify it wants a uImage built by default
232 config ARCH_HIBERNATION_POSSIBLE
236 config ARCH_SUSPEND_POSSIBLE
238 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
239 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
242 config PPC_DCR_NATIVE
252 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
255 config PPC_OF_PLATFORM_PCI
258 depends on PPC64 # not supported on 32 bits yet
261 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
262 depends on PPC32 || PPC_STD_MMU_64
265 config ARCH_SUPPORTS_UPROBES
268 config PPC_ADV_DEBUG_REGS
270 depends on 40x || BOOKE
273 config PPC_ADV_DEBUG_IACS
275 depends on PPC_ADV_DEBUG_REGS
279 config PPC_ADV_DEBUG_DACS
281 depends on PPC_ADV_DEBUG_REGS
284 config PPC_ADV_DEBUG_DVCS
286 depends on PPC_ADV_DEBUG_REGS
290 config PPC_ADV_DEBUG_DAC_RANGE
292 depends on PPC_ADV_DEBUG_REGS && 44x
295 config PPC_EMULATE_SSTEP
297 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
303 config PGTABLE_LEVELS
306 default 3 if PPC_64K_PAGES
309 source "init/Kconfig"
311 source "kernel/Kconfig.freezer"
313 source "arch/powerpc/sysdev/Kconfig"
314 source "arch/powerpc/platforms/Kconfig"
316 menu "Kernel options"
319 bool "High memory support"
322 source kernel/Kconfig.hz
323 source kernel/Kconfig.preempt
324 source "fs/Kconfig.binfmt"
326 config HUGETLB_PAGE_SIZE_VARIABLE
328 depends on HUGETLB_PAGE
331 config MATH_EMULATION
332 bool "Math emulation"
333 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
335 Some PowerPC chips designed for embedded applications do not have
336 a floating-point unit and therefore do not implement the
337 floating-point instructions in the PowerPC instruction set. If you
338 say Y here, the kernel will include code to emulate a floating-point
339 unit, which will allow programs that use floating-point
342 This is also useful to emulate missing (optional) instructions
343 such as fsqrt on cores that do have an FPU but do not implement
344 them (such as Freescale BookE).
347 prompt "Math emulation options"
348 default MATH_EMULATION_FULL
349 depends on MATH_EMULATION
351 config MATH_EMULATION_FULL
352 bool "Emulate all the floating point instructions"
354 Select this option will enable the kernel to support to emulate
355 all the floating point instructions. If your SoC doesn't have
356 a FPU, you should select this.
358 config MATH_EMULATION_HW_UNIMPLEMENTED
359 bool "Just emulate the FPU unimplemented instructions"
361 Select this if you know there does have a hardware FPU on your
362 SoC, but some floating point instructions are not implemented by that.
366 config PPC_TRANSACTIONAL_MEM
367 bool "Transactional Memory support for POWERPC"
368 depends on PPC_BOOK3S_64
374 Support user-mode Transactional Memory on POWERPC.
380 bool "SWIOTLB support"
384 Support for IO bounce buffering for systems without an IOMMU.
385 This allows us to DMA to the full physical address space on
386 platforms where the size of a physical address is larger
387 than the bus address. Not all platforms support this.
390 bool "Support for enabling/disabling CPUs"
391 depends on SMP && (PPC_PSERIES || \
392 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
394 Say Y here to be able to disable and re-enable individual
395 CPUs at runtime on SMP machines.
397 Say N if you are unsure.
399 config ARCH_CPU_PROBE_RELEASE
401 depends on HOTPLUG_CPU
403 config ARCH_ENABLE_MEMORY_HOTPLUG
406 config ARCH_HAS_WALK_MEMORY
409 config ARCH_ENABLE_MEMORY_HOTREMOVE
412 config PPC64_SUPPORTS_MEMORY_FAILURE
413 bool "Add support for memory hwpoison"
414 depends on PPC_BOOK3S_64
415 default "y" if PPC_POWERNV
416 select ARCH_SUPPORTS_MEMORY_FAILURE
419 bool "kexec system call"
420 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
423 kexec is a system call that implements the ability to shutdown your
424 current kernel, and to start another kernel. It is like a reboot
425 but it is independent of the system firmware. And like a reboot
426 you can start any kernel with it, not just Linux.
428 The name comes from the similarity to the exec system call.
430 It is an ongoing process to be certain the hardware in a machine
431 is properly shutdown, so do not be surprised if this code does not
432 initially work for you. As of this writing the exact hardware
433 interface is strongly in flux, so no good recommendation can be
437 bool "Build a kdump crash kernel"
438 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
439 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
441 Build a kernel suitable for use as a kdump capture kernel.
442 The same kernel binary can be used as production kernel and dump
446 bool "Firmware-assisted dump"
447 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
449 A robust mechanism to get reliable kernel crash dump with
450 assistance from firmware. This approach does not use kexec,
451 instead firmware assists in booting the kdump kernel
452 while preserving memory contents. Firmware-assisted dump
453 is meant to be a kdump replacement offering robustness and
454 speed not possible without system firmware assistance.
459 bool "Distribute interrupts on all CPUs by default"
462 This option gives the kernel permission to distribute IRQs across
463 multiple CPUs. Saying N here will route all IRQs to the first
464 CPU. Generally saying Y is safe, although some problems have been
465 reported with SMP Power Macintoshes with this option enabled.
470 default y if SMP && PPC_PSERIES
476 depends on NEED_MULTIPLE_NODES
478 config USE_PERCPU_NUMA_NODE_ID
482 config HAVE_MEMORYLESS_NODES
486 config ARCH_SELECT_MEMORY_MODEL
490 config ARCH_FLATMEM_ENABLE
492 depends on (PPC64 && !NUMA) || PPC32
494 config ARCH_SPARSEMEM_ENABLE
497 select SPARSEMEM_VMEMMAP_ENABLE
499 config ARCH_SPARSEMEM_DEFAULT
501 depends on (SMP && PPC_PSERIES) || PPC_PS3
503 config SYS_SUPPORTS_HUGETLBFS
508 config ARCH_MEMORY_PROBE
510 depends on MEMORY_HOTPLUG
512 # Some NUMA nodes have memory ranges that span
513 # other nodes. Even though a pfn is valid and
514 # between a node's start and end pfns, it may not
515 # reside on that node. See memmap_init_zone()
517 config NODES_SPAN_OTHER_NODES
519 depends on NEED_MULTIPLE_NODES
522 bool "Using standard binutils settings"
526 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
527 Note, that kernel will be able to run only those applications,
528 which had been compiled using binutils later than 2.17.50.0.3 with
529 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
530 the older binutils, you can patch them with a trivial patch, which
531 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
537 Select the kernel logical page size. Increasing the page size
538 will reduce software overhead at each page boundary, allow
539 hardware prefetch mechanisms to be more effective, and allow
540 larger dma transfers increasing IO efficiency and reducing
541 overhead. However the utilization of memory will increase.
542 For example, each cached file will using a multiple of the
543 page size to hold its contents and the difference between the
544 end of file and the end of page is wasted.
546 Some dedicated systems, such as software raid serving with
547 accelerated calculations, have shown significant increases.
549 If you configure a 64 bit kernel for 64k pages but the
550 processor does not support them, then the kernel will simulate
551 them with 4k pages, loading them on demand, but with the
552 reduced software overhead and larger internal fragmentation.
553 For the 32 bit kernel, a large page option will not be offered
554 unless it is supported by the configured processor.
556 If unsure, choose 4K_PAGES.
560 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
564 depends on 44x || PPC_8xx
568 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
569 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
571 config PPC_256K_PAGES
572 bool "256k page size"
573 depends on 44x && !STDBINUTILS
575 Make the page size 256k.
577 As the ELF standard only requires alignment to support page
578 sizes up to 64k, you will need to compile all of your user
579 space applications with a non-standard binutils settings
580 (see the STDBINUTILS description for details).
582 Say N unless you know what you are doing.
586 config FORCE_MAX_ZONEORDER
587 int "Maximum zone order"
588 range 9 64 if PPC64 && PPC_64K_PAGES
589 default "9" if PPC64 && PPC_64K_PAGES
590 range 13 64 if PPC64 && !PPC_64K_PAGES
591 default "13" if PPC64 && !PPC_64K_PAGES
592 range 9 64 if PPC32 && PPC_16K_PAGES
593 default "9" if PPC32 && PPC_16K_PAGES
594 range 7 64 if PPC32 && PPC_64K_PAGES
595 default "7" if PPC32 && PPC_64K_PAGES
596 range 5 64 if PPC32 && PPC_256K_PAGES
597 default "5" if PPC32 && PPC_256K_PAGES
601 The kernel memory allocator divides physically contiguous memory
602 blocks into "zones", where each zone is a power of two number of
603 pages. This option selects the largest power of two that the kernel
604 keeps in the memory allocator. If you need to allocate very large
605 blocks of physically contiguous memory, then you may need to
608 This config option is actually maximum order plus one. For example,
609 a value of 11 means that the largest free memory block is 2^10 pages.
611 The page size is not necessarily 4KB. For example, on 64-bit
612 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
613 this in mind when choosing a value for this option.
615 config PPC_SUBPAGE_PROT
616 bool "Support setting protections for 4k subpages"
617 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
619 This option adds support for a system call to allow user programs
620 to set access permissions (read/write, readonly, or no access)
621 on the 4k subpages of each 64k page.
623 config PPC_COPRO_BASE
628 bool "SMT (Hyperthreading) scheduler support"
629 depends on PPC64 && SMP
631 SMT scheduler support improves the CPU scheduler's decision making
632 when dealing with POWER5 cpus at a cost of slightly increased
633 overhead in some places. If unsure say N here.
635 config PPC_DENORMALISATION
636 bool "PowerPC denormalisation exception handling"
637 depends on PPC_BOOK3S_64
638 default "y" if PPC_POWERNV
640 Add support for handling denormalisation of single precision
641 values. Useful for bare metal only. If unsure say Y here.
644 bool "Default bootloader kernel arguments"
647 string "Initial kernel command string"
648 depends on CMDLINE_BOOL
649 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
651 On some platforms, there is currently no way for the boot loader to
652 pass arguments to the kernel. For these platforms, you can supply
653 some command-line options at build time by entering them here. In
654 most cases you will need to specify the root device here.
657 bool "Always use the default kernel command string"
658 depends on CMDLINE_BOOL
660 Always use the default kernel command string, even if the boot
661 loader passes other arguments to the kernel.
662 This is useful if you cannot or don't want to change the
663 command-line options your boot loader passes to the kernel.
666 string "Additional default image types"
668 List additional targets to be built by the bootwrapper here (separated
669 by spaces). This is useful for targets that depend of device tree
670 files in the .dts directory.
672 Targets in this list will be build as part of the default build
673 target, or when the user does a 'make zImage' or a
674 'make zImage.initrd'.
676 If unsure, leave blank
678 config ARCH_WANTS_FREEZER_CONTROL
682 source kernel/power/Kconfig
685 bool "Enable seccomp to safely compute untrusted bytecode"
689 This kernel feature is useful for number crunching applications
690 that may need to compute untrusted bytecode during their
691 execution. By using pipes or other transports made available to
692 the process as file descriptors supporting the read/write
693 syscalls, it's possible to isolate those applications in
694 their own address space using seccomp. Once seccomp is
695 enabled via /proc/<pid>/seccomp, it cannot be disabled
696 and the task is only allowed to execute a few safe syscalls
697 defined by each seccomp mode.
699 If unsure, say Y. Only embedded should say N here.
710 bool "Support for ISA-bus hardware"
714 Find out whether you have ISA slots on your motherboard. ISA is the
715 name of a bus system, i.e. the way the CPU talks to the other stuff
716 inside your box. If you have an Apple machine, say N here; if you
717 have an IBM RS/6000 or pSeries machine, say Y. If you have an
718 embedded board, consult your board documentation.
724 config NEED_DMA_MAP_STATE
725 def_bool (PPC64 || NOT_COHERENT_CACHE)
727 config NEED_SG_DMA_LENGTH
730 config GENERIC_ISA_DMA
732 depends on ISA_DMA_API
735 config PPC_INDIRECT_PCI
738 default y if 40x || 44x
752 select PPC_INDIRECT_PCI
758 depends on SUSPEND && (PPC_85xx || PPC_86xx)
760 Freescale MPC85xx/MPC86xx power management controller support
761 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
766 depends on SUSPEND && (44x || 40x)
768 PPC4xx Clock Power Management (CPM) support (suspend/resume).
769 It also enables support for two different idle states (idle-wait
776 bool "Freescale Local Bus support"
779 Enables reporting of errors from the Freescale local bus
780 controller. Also contains some common code used by
781 drivers for specific local bus peripherals.
785 depends on PPC_83xx || QUICC_ENGINE || CPM2
787 Freescale General-purpose Timers support
789 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
793 # Platforms that what PCI turned unconditionally just do select PCI
794 # in their config node. Platforms that want to choose at config
795 # time should select PPC_PCI_CHOICE
796 config PPC_PCI_CHOICE
800 bool "PCI support" if PPC_PCI_CHOICE
801 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
802 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
803 default PCI_QSPAN if !4xx && !CPM2 && 8xx
804 select GENERIC_PCI_IOMAP
806 Find out whether your system includes a PCI bus. PCI is the name of
807 a bus system, i.e. the way the CPU talks to the other stuff inside
808 your box. If you say Y here, the kernel will include drivers and
809 infrastructure code to support PCI bus devices.
819 depends on !4xx && !CPM2 && 8xx
822 Say Y here if you have a system based on a Motorola 8xx-series
823 embedded processor with a QSPAN PCI interface, otherwise say N.
827 depends on PCI && 8260
828 select PPC_INDIRECT_PCI
831 source "drivers/pci/Kconfig"
833 source "drivers/pcmcia/Kconfig"
840 tristate "RapidIO support"
841 depends on HAS_RAPIDIO || PCI
843 If you say Y here, the kernel will include drivers and
844 infrastructure code to support RapidIO interconnect devices.
847 bool "Freescale Embedded SRIO Controller support"
848 depends on RAPIDIO = y && HAS_RAPIDIO
851 Include support for RapidIO controller on Freescale embedded
852 processors (MPC8548, MPC8641, etc).
854 source "drivers/rapidio/Kconfig"
858 config NONSTATIC_KERNEL
862 menu "Advanced setup"
865 config ADVANCED_OPTIONS
866 bool "Prompt for advanced kernel configuration options"
868 This option will enable prompting for a variety of advanced kernel
869 configuration options. These options can cause the kernel to not
870 work if they are set incorrectly, but can be used to optimize certain
871 aspects of kernel memory management.
873 Unless you know what you are doing, say N here.
875 comment "Default settings for advanced configuration options are used"
876 depends on !ADVANCED_OPTIONS
878 config LOWMEM_SIZE_BOOL
879 bool "Set maximum low memory"
880 depends on ADVANCED_OPTIONS
882 This option allows you to set the maximum amount of memory which
883 will be used as "low memory", that is, memory which the kernel can
884 access directly, without having to set up a kernel virtual mapping.
885 This can be useful in optimizing the layout of kernel virtual
888 Say N here unless you know what you are doing.
891 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
894 config LOWMEM_CAM_NUM_BOOL
895 bool "Set number of CAMs to use to map low memory"
896 depends on ADVANCED_OPTIONS && FSL_BOOKE
898 This option allows you to set the maximum number of CAM slots that
899 will be used to map low memory. There are a limited number of slots
900 available and even more limited number that will fit in the L1 MMU.
901 However, using more entries will allow mapping more low memory. This
902 can be useful in optimizing the layout of kernel virtual memory.
904 Say N here unless you know what you are doing.
906 config LOWMEM_CAM_NUM
908 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
911 config DYNAMIC_MEMSTART
912 bool "Enable page aligned dynamic load address for kernel"
913 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
914 select NONSTATIC_KERNEL
916 This option enables the kernel to be loaded at any page aligned
917 physical address. The kernel creates a mapping from KERNELBASE to
918 the address where the kernel is loaded. The page size here implies
919 the TLB page size of the mapping for kernel on the particular platform.
920 Please refer to the init code for finding the TLB page size.
922 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
923 kernel image, where the only restriction is the page aligned kernel
924 load address. When this option is enabled, the compile time physical
925 address CONFIG_PHYSICAL_START is ignored.
927 This option is overridden by CONFIG_RELOCATABLE
930 bool "Build a relocatable kernel"
931 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
932 select NONSTATIC_KERNEL
934 This builds a kernel image that is capable of running at the
935 location the kernel is loaded at, without any alignment restrictions.
936 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
938 One use is for the kexec on panic case where the recovery kernel
939 must live at a different physical address than the primary
942 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
943 it has been loaded at and the compile time physical addresses
944 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
945 setting can still be useful to bootwrappers that need to know the
946 load address of the kernel (eg. u-boot/mkimage).
948 config RELOCATABLE_PPC32
950 depends on PPC32 && RELOCATABLE
952 config PAGE_OFFSET_BOOL
953 bool "Set custom page offset address"
954 depends on ADVANCED_OPTIONS
956 This option allows you to set the kernel virtual address at which
957 the kernel will map low memory. This can be useful in optimizing
958 the virtual memory layout of the system.
960 Say N here unless you know what you are doing.
963 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
966 config KERNEL_START_BOOL
967 bool "Set custom kernel base address"
968 depends on ADVANCED_OPTIONS
970 This option allows you to set the kernel virtual address at which
971 the kernel will be loaded. Normally this should match PAGE_OFFSET
972 however there are times (like kdump) that one might not want them
975 Say N here unless you know what you are doing.
978 hex "Virtual address of kernel base" if KERNEL_START_BOOL
979 default PAGE_OFFSET if PAGE_OFFSET_BOOL
980 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
983 config PHYSICAL_START_BOOL
984 bool "Set physical address where the kernel is loaded"
985 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
987 This gives the physical address where the kernel is loaded.
989 Say N here unless you know what you are doing.
991 config PHYSICAL_START
992 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
993 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
996 config PHYSICAL_ALIGN
998 default "0x04000000" if FSL_BOOKE
1000 This value puts the alignment restrictions on physical address
1001 where kernel is loaded and run from. Kernel is compiled for an
1002 address which meets above alignment restriction.
1004 config TASK_SIZE_BOOL
1005 bool "Set custom user task size"
1006 depends on ADVANCED_OPTIONS
1008 This option allows you to set the amount of virtual address space
1009 allocated to user tasks. This can be useful in optimizing the
1010 virtual memory layout of the system.
1012 Say N here unless you know what you are doing.
1015 hex "Size of user task space" if TASK_SIZE_BOOL
1016 default "0x80000000" if PPC_8xx
1017 default "0xc0000000"
1019 config CONSISTENT_SIZE_BOOL
1020 bool "Set custom consistent memory pool size"
1021 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1023 This option allows you to set the size of the
1024 consistent memory pool. This pool of virtual memory
1025 is used to make consistent memory allocations.
1027 config CONSISTENT_SIZE
1028 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1029 default "0x00200000" if NOT_COHERENT_CACHE
1032 bool "Pinned Kernel TLBs (860 ONLY)"
1033 depends on ADVANCED_OPTIONS && 8xx
1038 bool "Build a relocatable kernel"
1039 depends on !COMPILE_TEST
1040 select NONSTATIC_KERNEL
1042 This builds a kernel image that is capable of running anywhere
1043 in the RMA (real memory area) at any 16k-aligned base address.
1044 The kernel is linked as a position-independent executable (PIE)
1045 and contains dynamic relocations which are processed early
1046 in the bootup process.
1048 One use is for the kexec on panic case where the recovery kernel
1049 must live at a different physical address than the primary
1052 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1055 default "0xc000000000000000"
1058 default "0xc000000000000000"
1059 config PHYSICAL_START
1061 default "0x00000000"
1067 source "net/Kconfig"
1069 source "drivers/Kconfig"
1073 source "lib/Kconfig"
1075 source "arch/powerpc/Kconfig.debug"
1077 source "security/Kconfig"
1081 depends on COMPAT && KEYS
1084 source "crypto/Kconfig"
1086 config PPC_LIB_RHEAP
1089 source "arch/powerpc/kvm/Kconfig"