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
88 select ARCH_MIGHT_HAVE_PC_PARPORT
89 select ARCH_MIGHT_HAVE_PC_SERIO
92 select OF_EARLY_FLATTREE
93 select OF_RESERVED_MEM
94 select HAVE_FTRACE_MCOUNT_RECORD
95 select HAVE_DYNAMIC_FTRACE
96 select HAVE_FUNCTION_TRACER
97 select HAVE_FUNCTION_GRAPH_TRACER
98 select SYSCTL_EXCEPTION_TRACE
99 select ARCH_WANT_OPTIONAL_GPIOLIB
100 select VIRT_TO_BUS if !PPC64
102 select HAVE_IOREMAP_PROT
103 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
105 select HAVE_ARCH_KGDB
106 select HAVE_KRETPROBES
107 select HAVE_ARCH_TRACEHOOK
109 select HAVE_MEMBLOCK_NODE_MAP
110 select HAVE_DMA_ATTRS
111 select HAVE_DMA_API_DEBUG
113 select HAVE_DEBUG_KMEMLEAK
114 select GENERIC_ATOMIC64 if PPC32
115 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
116 select HAVE_PERF_EVENTS
117 select HAVE_REGS_AND_STACK_ACCESS_API
118 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
119 select ARCH_WANT_IPC_PARSE_VERSION
122 select GENERIC_IRQ_SHOW
123 select GENERIC_IRQ_SHOW_LEVEL
124 select IRQ_FORCED_THREADING
125 select HAVE_RCU_TABLE_FREE if SMP
126 select HAVE_SYSCALL_TRACEPOINTS
127 select HAVE_BPF_JIT if PPC64
128 select HAVE_ARCH_JUMP_LABEL
129 select ARCH_HAVE_NMI_SAFE_CMPXCHG
130 select GENERIC_SMP_IDLE_THREAD
131 select GENERIC_CMOS_UPDATE
132 select GENERIC_TIME_VSYSCALL_OLD
133 select GENERIC_CLOCKEVENTS
134 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
135 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
136 select GENERIC_STRNCPY_FROM_USER
137 select GENERIC_STRNLEN_USER
138 select HAVE_MOD_ARCH_SPECIFIC
139 select MODULES_USE_ELF_RELA
140 select CLONE_BACKWARDS
141 select ARCH_USE_BUILTIN_BSWAP
142 select OLD_SIGSUSPEND
143 select OLD_SIGACTION if PPC32
144 select HAVE_DEBUG_STACKOVERFLOW
145 select HAVE_IRQ_EXIT_ON_IRQ_STACK
146 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
147 select HAVE_ARCH_AUDITSYSCALL
150 def_bool CPU_LITTLE_ENDIAN
163 select COMPAT_BINFMT_ELF
164 select ARCH_WANT_OLD_COMPAT_IPC
165 select COMPAT_OLD_SIGACTION
167 config SYSVIPC_COMPAT
169 depends on COMPAT && SYSVIPC
172 # All PPC32s use generic nvram driver through ppc_md
177 config SCHED_OMIT_FRAME_POINTER
181 config ARCH_MAY_HAVE_PC_FDC
183 default !PPC_PSERIES || PCI
188 config PPC_UDBG_16550
192 config GENERIC_TBSYNC
194 default y if PPC32 && SMP
206 config SYS_SUPPORTS_APM_EMULATION
207 default y if PMAC_APM_EMU
213 Used to allow a board to specify it wants an ePAPR compliant wrapper.
216 config DEFAULT_UIMAGE
219 Used to allow a board to specify it wants a uImage built by default
222 config ARCH_HIBERNATION_POSSIBLE
226 config ARCH_SUSPEND_POSSIBLE
228 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
229 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
232 config PPC_DCR_NATIVE
242 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
245 config PPC_OF_PLATFORM_PCI
248 depends on PPC64 # not supported on 32 bits yet
251 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
254 config ARCH_SUPPORTS_UPROBES
257 config PPC_ADV_DEBUG_REGS
259 depends on 40x || BOOKE
262 config PPC_ADV_DEBUG_IACS
264 depends on PPC_ADV_DEBUG_REGS
268 config PPC_ADV_DEBUG_DACS
270 depends on PPC_ADV_DEBUG_REGS
273 config PPC_ADV_DEBUG_DVCS
275 depends on PPC_ADV_DEBUG_REGS
279 config PPC_ADV_DEBUG_DAC_RANGE
281 depends on PPC_ADV_DEBUG_REGS && 44x
284 config PPC_EMULATE_SSTEP
286 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
288 source "init/Kconfig"
290 source "kernel/Kconfig.freezer"
292 source "arch/powerpc/sysdev/Kconfig"
293 source "arch/powerpc/platforms/Kconfig"
295 menu "Kernel options"
298 bool "High memory support"
301 source kernel/Kconfig.hz
302 source kernel/Kconfig.preempt
303 source "fs/Kconfig.binfmt"
305 config HUGETLB_PAGE_SIZE_VARIABLE
307 depends on HUGETLB_PAGE
310 config MATH_EMULATION
311 bool "Math emulation"
312 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
314 Some PowerPC chips designed for embedded applications do not have
315 a floating-point unit and therefore do not implement the
316 floating-point instructions in the PowerPC instruction set. If you
317 say Y here, the kernel will include code to emulate a floating-point
318 unit, which will allow programs that use floating-point
321 This is also useful to emulate missing (optional) instructions
322 such as fsqrt on cores that do have an FPU but do not implement
323 them (such as Freescale BookE).
326 prompt "Math emulation options"
327 default MATH_EMULATION_FULL
328 depends on MATH_EMULATION
330 config MATH_EMULATION_FULL
331 bool "Emulate all the floating point instructions"
333 Select this option will enable the kernel to support to emulate
334 all the floating point instructions. If your SoC doesn't have
335 a FPU, you should select this.
337 config MATH_EMULATION_HW_UNIMPLEMENTED
338 bool "Just emulate the FPU unimplemented instructions"
340 Select this if you know there does have a hardware FPU on your
341 SoC, but some floating point instructions are not implemented by that.
345 config PPC_TRANSACTIONAL_MEM
346 bool "Transactional Memory support for POWERPC"
347 depends on PPC_BOOK3S_64
353 Support user-mode Transactional Memory on POWERPC.
359 bool "SWIOTLB support"
363 Support for IO bounce buffering for systems without an IOMMU.
364 This allows us to DMA to the full physical address space on
365 platforms where the size of a physical address is larger
366 than the bus address. Not all platforms support this.
369 bool "Support for enabling/disabling CPUs"
370 depends on SMP && (PPC_PSERIES || \
371 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
373 Say Y here to be able to disable and re-enable individual
374 CPUs at runtime on SMP machines.
376 Say N if you are unsure.
378 config ARCH_CPU_PROBE_RELEASE
380 depends on HOTPLUG_CPU
382 config ARCH_ENABLE_MEMORY_HOTPLUG
385 config ARCH_HAS_WALK_MEMORY
388 config ARCH_ENABLE_MEMORY_HOTREMOVE
391 config PPC64_SUPPORTS_MEMORY_FAILURE
392 bool "Add support for memory hwpoison"
393 depends on PPC_BOOK3S_64
394 default "y" if PPC_POWERNV
395 select ARCH_SUPPORTS_MEMORY_FAILURE
398 bool "kexec system call"
399 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
401 kexec is a system call that implements the ability to shutdown your
402 current kernel, and to start another kernel. It is like a reboot
403 but it is independent of the system firmware. And like a reboot
404 you can start any kernel with it, not just Linux.
406 The name comes from the similarity to the exec system call.
408 It is an ongoing process to be certain the hardware in a machine
409 is properly shutdown, so do not be surprised if this code does not
410 initially work for you. As of this writing the exact hardware
411 interface is strongly in flux, so no good recommendation can be
415 bool "Build a kdump crash kernel"
416 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
417 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
419 Build a kernel suitable for use as a kdump capture kernel.
420 The same kernel binary can be used as production kernel and dump
424 bool "Firmware-assisted dump"
425 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
427 A robust mechanism to get reliable kernel crash dump with
428 assistance from firmware. This approach does not use kexec,
429 instead firmware assists in booting the kdump kernel
430 while preserving memory contents. Firmware-assisted dump
431 is meant to be a kdump replacement offering robustness and
432 speed not possible without system firmware assistance.
437 bool "Distribute interrupts on all CPUs by default"
440 This option gives the kernel permission to distribute IRQs across
441 multiple CPUs. Saying N here will route all IRQs to the first
442 CPU. Generally saying Y is safe, although some problems have been
443 reported with SMP Power Macintoshes with this option enabled.
448 default y if SMP && PPC_PSERIES
454 depends on NEED_MULTIPLE_NODES
456 config USE_PERCPU_NUMA_NODE_ID
460 config HAVE_MEMORYLESS_NODES
464 config ARCH_SELECT_MEMORY_MODEL
468 config ARCH_FLATMEM_ENABLE
470 depends on (PPC64 && !NUMA) || PPC32
472 config ARCH_SPARSEMEM_ENABLE
475 select SPARSEMEM_VMEMMAP_ENABLE
477 config ARCH_SPARSEMEM_DEFAULT
479 depends on (SMP && PPC_PSERIES) || PPC_PS3
481 config SYS_SUPPORTS_HUGETLBFS
486 config ARCH_MEMORY_PROBE
488 depends on MEMORY_HOTPLUG
490 # Some NUMA nodes have memory ranges that span
491 # other nodes. Even though a pfn is valid and
492 # between a node's start and end pfns, it may not
493 # reside on that node. See memmap_init_zone()
495 config NODES_SPAN_OTHER_NODES
497 depends on NEED_MULTIPLE_NODES
499 config PPC_HAS_HASH_64K
505 bool "Using standard binutils settings"
509 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
510 Note, that kernel will be able to run only those applications,
511 which had been compiled using binutils later than 2.17.50.0.3 with
512 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
513 the older binutils, you can patch them with a trivial patch, which
514 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
520 Select the kernel logical page size. Increasing the page size
521 will reduce software overhead at each page boundary, allow
522 hardware prefetch mechanisms to be more effective, and allow
523 larger dma transfers increasing IO efficiency and reducing
524 overhead. However the utilization of memory will increase.
525 For example, each cached file will using a multiple of the
526 page size to hold its contents and the difference between the
527 end of file and the end of page is wasted.
529 Some dedicated systems, such as software raid serving with
530 accelerated calculations, have shown significant increases.
532 If you configure a 64 bit kernel for 64k pages but the
533 processor does not support them, then the kernel will simulate
534 them with 4k pages, loading them on demand, but with the
535 reduced software overhead and larger internal fragmentation.
536 For the 32 bit kernel, a large page option will not be offered
537 unless it is supported by the configured processor.
539 If unsure, choose 4K_PAGES.
545 bool "16k page size" if 44x
548 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
549 depends on !PPC_FSL_BOOK3E
550 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
552 config PPC_256K_PAGES
553 bool "256k page size" if 44x
554 depends on !STDBINUTILS
556 Make the page size 256k.
558 As the ELF standard only requires alignment to support page
559 sizes up to 64k, you will need to compile all of your user
560 space applications with a non-standard binutils settings
561 (see the STDBINUTILS description for details).
563 Say N unless you know what you are doing.
567 config FORCE_MAX_ZONEORDER
568 int "Maximum zone order"
569 range 9 64 if PPC64 && PPC_64K_PAGES
570 default "9" if PPC64 && PPC_64K_PAGES
571 range 13 64 if PPC64 && !PPC_64K_PAGES
572 default "13" if PPC64 && !PPC_64K_PAGES
573 range 9 64 if PPC32 && PPC_16K_PAGES
574 default "9" if PPC32 && PPC_16K_PAGES
575 range 7 64 if PPC32 && PPC_64K_PAGES
576 default "7" if PPC32 && PPC_64K_PAGES
577 range 5 64 if PPC32 && PPC_256K_PAGES
578 default "5" if PPC32 && PPC_256K_PAGES
582 The kernel memory allocator divides physically contiguous memory
583 blocks into "zones", where each zone is a power of two number of
584 pages. This option selects the largest power of two that the kernel
585 keeps in the memory allocator. If you need to allocate very large
586 blocks of physically contiguous memory, then you may need to
589 This config option is actually maximum order plus one. For example,
590 a value of 11 means that the largest free memory block is 2^10 pages.
592 The page size is not necessarily 4KB. For example, on 64-bit
593 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
594 this in mind when choosing a value for this option.
596 config PPC_SUBPAGE_PROT
597 bool "Support setting protections for 4k subpages"
598 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
600 This option adds support for a system call to allow user programs
601 to set access permissions (read/write, readonly, or no access)
602 on the 4k subpages of each 64k page.
605 bool "SMT (Hyperthreading) scheduler support"
606 depends on PPC64 && SMP
608 SMT scheduler support improves the CPU scheduler's decision making
609 when dealing with POWER5 cpus at a cost of slightly increased
610 overhead in some places. If unsure say N here.
612 config PPC_DENORMALISATION
613 bool "PowerPC denormalisation exception handling"
614 depends on PPC_BOOK3S_64
615 default "y" if PPC_POWERNV
617 Add support for handling denormalisation of single precision
618 values. Useful for bare metal only. If unsure say Y here.
621 bool "Default bootloader kernel arguments"
624 string "Initial kernel command string"
625 depends on CMDLINE_BOOL
626 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
628 On some platforms, there is currently no way for the boot loader to
629 pass arguments to the kernel. For these platforms, you can supply
630 some command-line options at build time by entering them here. In
631 most cases you will need to specify the root device here.
634 bool "Always use the default kernel command string"
635 depends on CMDLINE_BOOL
637 Always use the default kernel command string, even if the boot
638 loader passes other arguments to the kernel.
639 This is useful if you cannot or don't want to change the
640 command-line options your boot loader passes to the kernel.
643 string "Additional default image types"
645 List additional targets to be built by the bootwrapper here (separated
646 by spaces). This is useful for targets that depend of device tree
647 files in the .dts directory.
649 Targets in this list will be build as part of the default build
650 target, or when the user does a 'make zImage' or a
651 'make zImage.initrd'.
653 If unsure, leave blank
655 config ARCH_WANTS_FREEZER_CONTROL
659 source kernel/power/Kconfig
662 bool "Enable seccomp to safely compute untrusted bytecode"
666 This kernel feature is useful for number crunching applications
667 that may need to compute untrusted bytecode during their
668 execution. By using pipes or other transports made available to
669 the process as file descriptors supporting the read/write
670 syscalls, it's possible to isolate those applications in
671 their own address space using seccomp. Once seccomp is
672 enabled via /proc/<pid>/seccomp, it cannot be disabled
673 and the task is only allowed to execute a few safe syscalls
674 defined by each seccomp mode.
676 If unsure, say Y. Only embedded should say N here.
687 bool "Support for ISA-bus hardware"
691 Find out whether you have ISA slots on your motherboard. ISA is the
692 name of a bus system, i.e. the way the CPU talks to the other stuff
693 inside your box. If you have an Apple machine, say N here; if you
694 have an IBM RS/6000 or pSeries machine, say Y. If you have an
695 embedded board, consult your board documentation.
701 config NEED_DMA_MAP_STATE
702 def_bool (PPC64 || NOT_COHERENT_CACHE)
704 config NEED_SG_DMA_LENGTH
707 config GENERIC_ISA_DMA
709 depends on ISA_DMA_API
712 config PPC_INDIRECT_PCI
715 default y if 40x || 44x
729 select PPC_INDIRECT_PCI
735 depends on SUSPEND && (PPC_85xx || PPC_86xx)
737 Freescale MPC85xx/MPC86xx power management controller support
738 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
743 depends on SUSPEND && (44x || 40x)
745 PPC4xx Clock Power Management (CPM) support (suspend/resume).
746 It also enables support for two different idle states (idle-wait
753 bool "Freescale Local Bus support"
756 Enables reporting of errors from the Freescale local bus
757 controller. Also contains some common code used by
758 drivers for specific local bus peripherals.
762 depends on PPC_83xx || QUICC_ENGINE || CPM2
764 Freescale General-purpose Timers support
766 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
770 # Platforms that what PCI turned unconditionally just do select PCI
771 # in their config node. Platforms that want to choose at config
772 # time should select PPC_PCI_CHOICE
773 config PPC_PCI_CHOICE
777 bool "PCI support" if PPC_PCI_CHOICE
778 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
779 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
780 default PCI_QSPAN if !4xx && !CPM2 && 8xx
781 select GENERIC_PCI_IOMAP
783 Find out whether your system includes a PCI bus. PCI is the name of
784 a bus system, i.e. the way the CPU talks to the other stuff inside
785 your box. If you say Y here, the kernel will include drivers and
786 infrastructure code to support PCI bus devices.
796 depends on !4xx && !CPM2 && 8xx
799 Say Y here if you have a system based on a Motorola 8xx-series
800 embedded processor with a QSPAN PCI interface, otherwise say N.
804 depends on PCI && 8260
805 select PPC_INDIRECT_PCI
808 source "drivers/pci/pcie/Kconfig"
810 source "drivers/pci/Kconfig"
812 source "drivers/pcmcia/Kconfig"
814 source "drivers/pci/hotplug/Kconfig"
821 tristate "RapidIO support"
822 depends on HAS_RAPIDIO || PCI
824 If you say Y here, the kernel will include drivers and
825 infrastructure code to support RapidIO interconnect devices.
828 bool "Freescale Embedded SRIO Controller support"
829 depends on RAPIDIO = y && HAS_RAPIDIO
832 Include support for RapidIO controller on Freescale embedded
833 processors (MPC8548, MPC8641, etc).
835 source "drivers/rapidio/Kconfig"
839 config NONSTATIC_KERNEL
843 menu "Advanced setup"
846 config ADVANCED_OPTIONS
847 bool "Prompt for advanced kernel configuration options"
849 This option will enable prompting for a variety of advanced kernel
850 configuration options. These options can cause the kernel to not
851 work if they are set incorrectly, but can be used to optimize certain
852 aspects of kernel memory management.
854 Unless you know what you are doing, say N here.
856 comment "Default settings for advanced configuration options are used"
857 depends on !ADVANCED_OPTIONS
859 config LOWMEM_SIZE_BOOL
860 bool "Set maximum low memory"
861 depends on ADVANCED_OPTIONS
863 This option allows you to set the maximum amount of memory which
864 will be used as "low memory", that is, memory which the kernel can
865 access directly, without having to set up a kernel virtual mapping.
866 This can be useful in optimizing the layout of kernel virtual
869 Say N here unless you know what you are doing.
872 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
875 config LOWMEM_CAM_NUM_BOOL
876 bool "Set number of CAMs to use to map low memory"
877 depends on ADVANCED_OPTIONS && FSL_BOOKE
879 This option allows you to set the maximum number of CAM slots that
880 will be used to map low memory. There are a limited number of slots
881 available and even more limited number that will fit in the L1 MMU.
882 However, using more entries will allow mapping more low memory. This
883 can be useful in optimizing the layout of kernel virtual memory.
885 Say N here unless you know what you are doing.
887 config LOWMEM_CAM_NUM
889 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
892 config DYNAMIC_MEMSTART
893 bool "Enable page aligned dynamic load address for kernel"
894 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
895 select NONSTATIC_KERNEL
897 This option enables the kernel to be loaded at any page aligned
898 physical address. The kernel creates a mapping from KERNELBASE to
899 the address where the kernel is loaded. The page size here implies
900 the TLB page size of the mapping for kernel on the particular platform.
901 Please refer to the init code for finding the TLB page size.
903 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
904 kernel image, where the only restriction is the page aligned kernel
905 load address. When this option is enabled, the compile time physical
906 address CONFIG_PHYSICAL_START is ignored.
908 This option is overridden by CONFIG_RELOCATABLE
911 bool "Build a relocatable kernel"
912 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
913 select NONSTATIC_KERNEL
915 This builds a kernel image that is capable of running at the
916 location the kernel is loaded at, without any alignment restrictions.
917 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
919 One use is for the kexec on panic case where the recovery kernel
920 must live at a different physical address than the primary
923 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
924 it has been loaded at and the compile time physical addresses
925 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
926 setting can still be useful to bootwrappers that need to know the
927 load address of the kernel (eg. u-boot/mkimage).
929 config RELOCATABLE_PPC32
931 depends on PPC32 && RELOCATABLE
933 config PAGE_OFFSET_BOOL
934 bool "Set custom page offset address"
935 depends on ADVANCED_OPTIONS
937 This option allows you to set the kernel virtual address at which
938 the kernel will map low memory. This can be useful in optimizing
939 the virtual memory layout of the system.
941 Say N here unless you know what you are doing.
944 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
947 config KERNEL_START_BOOL
948 bool "Set custom kernel base address"
949 depends on ADVANCED_OPTIONS
951 This option allows you to set the kernel virtual address at which
952 the kernel will be loaded. Normally this should match PAGE_OFFSET
953 however there are times (like kdump) that one might not want them
956 Say N here unless you know what you are doing.
959 hex "Virtual address of kernel base" if KERNEL_START_BOOL
960 default PAGE_OFFSET if PAGE_OFFSET_BOOL
961 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
964 config PHYSICAL_START_BOOL
965 bool "Set physical address where the kernel is loaded"
966 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
968 This gives the physical address where the kernel is loaded.
970 Say N here unless you know what you are doing.
972 config PHYSICAL_START
973 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
974 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
977 config PHYSICAL_ALIGN
979 default "0x04000000" if FSL_BOOKE
981 This value puts the alignment restrictions on physical address
982 where kernel is loaded and run from. Kernel is compiled for an
983 address which meets above alignment restriction.
985 config TASK_SIZE_BOOL
986 bool "Set custom user task size"
987 depends on ADVANCED_OPTIONS
989 This option allows you to set the amount of virtual address space
990 allocated to user tasks. This can be useful in optimizing the
991 virtual memory layout of the system.
993 Say N here unless you know what you are doing.
996 hex "Size of user task space" if TASK_SIZE_BOOL
997 default "0x80000000" if PPC_8xx
1000 config CONSISTENT_SIZE_BOOL
1001 bool "Set custom consistent memory pool size"
1002 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1004 This option allows you to set the size of the
1005 consistent memory pool. This pool of virtual memory
1006 is used to make consistent memory allocations.
1008 config CONSISTENT_SIZE
1009 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1010 default "0x00200000" if NOT_COHERENT_CACHE
1013 bool "Pinned Kernel TLBs (860 ONLY)"
1014 depends on ADVANCED_OPTIONS && 8xx
1019 bool "Build a relocatable kernel"
1020 select NONSTATIC_KERNEL
1022 This builds a kernel image that is capable of running anywhere
1023 in the RMA (real memory area) at any 16k-aligned base address.
1024 The kernel is linked as a position-independent executable (PIE)
1025 and contains dynamic relocations which are processed early
1026 in the bootup process.
1028 One use is for the kexec on panic case where the recovery kernel
1029 must live at a different physical address than the primary
1032 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1035 default "0xc000000000000000"
1038 default "0xc000000000000000"
1039 config PHYSICAL_START
1041 default "0x00000000"
1047 source "net/Kconfig"
1049 source "drivers/Kconfig"
1053 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1055 source "lib/Kconfig"
1057 source "arch/powerpc/Kconfig.debug"
1059 source "security/Kconfig"
1063 depends on COMPAT && KEYS
1066 source "crypto/Kconfig"
1068 config PPC_LIB_RHEAP
1071 source "arch/powerpc/kvm/Kconfig"