1 source "arch/powerpc/platforms/Kconfig.cputype"
20 config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
23 config ARCH_DMA_ADDR_T_64BIT
24 def_bool ARCH_PHYS_ADDR_T_64BIT
30 config HAVE_SETUP_PER_CPU_AREA
33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
37 int "Number of virtual interrupt numbers"
41 This defines the number of virtual interrupt numbers the kernel
42 can manage. Virtual interrupt numbers are what you see in
43 /proc/interrupts. If you configure your system to have too few,
44 drivers will fail to load or worse - handle with care.
46 config STACKTRACE_SUPPORT
50 config HAVE_LATENCYTOP_SUPPORT
53 config TRACE_IRQFLAGS_SUPPORT
57 config LOCKDEP_SUPPORT
61 config RWSEM_GENERIC_SPINLOCK
64 config RWSEM_XCHGADD_ALGORITHM
68 config GENERIC_LOCKBREAK
71 depends on SMP && PREEMPT
73 config ARCH_HAS_ILOG2_U32
77 config ARCH_HAS_ILOG2_U64
81 config GENERIC_HWEIGHT
85 config ARCH_HAS_DMA_SET_COHERENT_MASK
91 select ARCH_MIGHT_HAVE_PC_PARPORT
92 select ARCH_MIGHT_HAVE_PC_SERIO
94 select ARCH_HAS_ELF_RANDOMIZE
96 select OF_EARLY_FLATTREE
97 select OF_RESERVED_MEM
98 select HAVE_FTRACE_MCOUNT_RECORD
99 select HAVE_DYNAMIC_FTRACE
100 select HAVE_FUNCTION_TRACER
101 select HAVE_FUNCTION_GRAPH_TRACER
102 select SYSCTL_EXCEPTION_TRACE
103 select ARCH_WANT_OPTIONAL_GPIOLIB
104 select VIRT_TO_BUS if !PPC64
106 select HAVE_IOREMAP_PROT
107 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
109 select HAVE_ARCH_KGDB
110 select HAVE_KRETPROBES
111 select HAVE_ARCH_TRACEHOOK
113 select HAVE_MEMBLOCK_NODE_MAP
114 select HAVE_DMA_ATTRS
115 select HAVE_DMA_API_DEBUG
116 select HAVE_EXIT_THREAD
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
165 select HAVE_ARCH_HARDENED_USERCOPY
167 config PPC_BARRIER_NOSPEC
170 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
173 def_bool CPU_LITTLE_ENDIAN
186 select COMPAT_BINFMT_ELF
187 select ARCH_WANT_OLD_COMPAT_IPC
188 select COMPAT_OLD_SIGACTION
190 config SYSVIPC_COMPAT
192 depends on COMPAT && SYSVIPC
195 # All PPC32s use generic nvram driver through ppc_md
200 config SCHED_OMIT_FRAME_POINTER
204 config ARCH_MAY_HAVE_PC_FDC
208 config PPC_UDBG_16550
212 config GENERIC_TBSYNC
214 default y if PPC32 && SMP
226 config SYS_SUPPORTS_APM_EMULATION
227 default y if PMAC_APM_EMU
233 Used to allow a board to specify it wants an ePAPR compliant wrapper.
236 config DEFAULT_UIMAGE
239 Used to allow a board to specify it wants a uImage built by default
242 config ARCH_HIBERNATION_POSSIBLE
246 config ARCH_SUSPEND_POSSIBLE
248 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
249 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
252 config PPC_DCR_NATIVE
262 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
265 config PPC_OF_PLATFORM_PCI
268 depends on PPC64 # not supported on 32 bits yet
271 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
272 depends on PPC32 || PPC_STD_MMU_64
275 config ARCH_SUPPORTS_UPROBES
278 config PPC_ADV_DEBUG_REGS
280 depends on 40x || BOOKE
283 config PPC_ADV_DEBUG_IACS
285 depends on PPC_ADV_DEBUG_REGS
289 config PPC_ADV_DEBUG_DACS
291 depends on PPC_ADV_DEBUG_REGS
294 config PPC_ADV_DEBUG_DVCS
296 depends on PPC_ADV_DEBUG_REGS
300 config PPC_ADV_DEBUG_DAC_RANGE
302 depends on PPC_ADV_DEBUG_REGS && 44x
305 config PPC_EMULATE_SSTEP
307 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
313 config PGTABLE_LEVELS
316 default 3 if PPC_64K_PAGES
319 source "init/Kconfig"
321 source "kernel/Kconfig.freezer"
323 source "arch/powerpc/sysdev/Kconfig"
324 source "arch/powerpc/platforms/Kconfig"
326 menu "Kernel options"
329 bool "High memory support"
332 source kernel/Kconfig.hz
333 source kernel/Kconfig.preempt
334 source "fs/Kconfig.binfmt"
336 config HUGETLB_PAGE_SIZE_VARIABLE
338 depends on HUGETLB_PAGE
341 config MATH_EMULATION
342 bool "Math emulation"
343 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
345 Some PowerPC chips designed for embedded applications do not have
346 a floating-point unit and therefore do not implement the
347 floating-point instructions in the PowerPC instruction set. If you
348 say Y here, the kernel will include code to emulate a floating-point
349 unit, which will allow programs that use floating-point
352 This is also useful to emulate missing (optional) instructions
353 such as fsqrt on cores that do have an FPU but do not implement
354 them (such as Freescale BookE).
357 prompt "Math emulation options"
358 default MATH_EMULATION_FULL
359 depends on MATH_EMULATION
361 config MATH_EMULATION_FULL
362 bool "Emulate all the floating point instructions"
364 Select this option will enable the kernel to support to emulate
365 all the floating point instructions. If your SoC doesn't have
366 a FPU, you should select this.
368 config MATH_EMULATION_HW_UNIMPLEMENTED
369 bool "Just emulate the FPU unimplemented instructions"
371 Select this if you know there does have a hardware FPU on your
372 SoC, but some floating point instructions are not implemented by that.
376 config PPC_TRANSACTIONAL_MEM
377 bool "Transactional Memory support for POWERPC"
378 depends on PPC_BOOK3S_64
384 Support user-mode Transactional Memory on POWERPC.
390 bool "SWIOTLB support"
394 Support for IO bounce buffering for systems without an IOMMU.
395 This allows us to DMA to the full physical address space on
396 platforms where the size of a physical address is larger
397 than the bus address. Not all platforms support this.
400 bool "Support for enabling/disabling CPUs"
401 depends on SMP && (PPC_PSERIES || \
402 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
404 Say Y here to be able to disable and re-enable individual
405 CPUs at runtime on SMP machines.
407 Say N if you are unsure.
409 config ARCH_CPU_PROBE_RELEASE
411 depends on HOTPLUG_CPU
413 config ARCH_ENABLE_MEMORY_HOTPLUG
416 config ARCH_HAS_WALK_MEMORY
419 config ARCH_ENABLE_MEMORY_HOTREMOVE
422 config PPC64_SUPPORTS_MEMORY_FAILURE
423 bool "Add support for memory hwpoison"
424 depends on PPC_BOOK3S_64
425 default "y" if PPC_POWERNV
426 select ARCH_SUPPORTS_MEMORY_FAILURE
429 bool "kexec system call"
430 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
433 kexec is a system call that implements the ability to shutdown your
434 current kernel, and to start another kernel. It is like a reboot
435 but it is independent of the system firmware. And like a reboot
436 you can start any kernel with it, not just Linux.
438 The name comes from the similarity to the exec system call.
440 It is an ongoing process to be certain the hardware in a machine
441 is properly shutdown, so do not be surprised if this code does not
442 initially work for you. As of this writing the exact hardware
443 interface is strongly in flux, so no good recommendation can be
447 bool "Build a kdump crash kernel"
448 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
449 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
451 Build a kernel suitable for use as a kdump capture kernel.
452 The same kernel binary can be used as production kernel and dump
456 bool "Firmware-assisted dump"
457 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
459 A robust mechanism to get reliable kernel crash dump with
460 assistance from firmware. This approach does not use kexec,
461 instead firmware assists in booting the kdump kernel
462 while preserving memory contents. Firmware-assisted dump
463 is meant to be a kdump replacement offering robustness and
464 speed not possible without system firmware assistance.
469 bool "Distribute interrupts on all CPUs by default"
472 This option gives the kernel permission to distribute IRQs across
473 multiple CPUs. Saying N here will route all IRQs to the first
474 CPU. Generally saying Y is safe, although some problems have been
475 reported with SMP Power Macintoshes with this option enabled.
480 default y if SMP && PPC_PSERIES
486 depends on NEED_MULTIPLE_NODES
488 config USE_PERCPU_NUMA_NODE_ID
492 config HAVE_MEMORYLESS_NODES
496 config ARCH_SELECT_MEMORY_MODEL
500 config ARCH_FLATMEM_ENABLE
502 depends on (PPC64 && !NUMA) || PPC32
504 config ARCH_SPARSEMEM_ENABLE
507 select SPARSEMEM_VMEMMAP_ENABLE
509 config ARCH_SPARSEMEM_DEFAULT
511 depends on (SMP && PPC_PSERIES) || PPC_PS3
513 config SYS_SUPPORTS_HUGETLBFS
518 config ARCH_MEMORY_PROBE
520 depends on MEMORY_HOTPLUG
522 # Some NUMA nodes have memory ranges that span
523 # other nodes. Even though a pfn is valid and
524 # between a node's start and end pfns, it may not
525 # reside on that node. See memmap_init_zone()
527 config NODES_SPAN_OTHER_NODES
529 depends on NEED_MULTIPLE_NODES
532 bool "Using standard binutils settings"
536 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
537 Note, that kernel will be able to run only those applications,
538 which had been compiled using binutils later than 2.17.50.0.3 with
539 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
540 the older binutils, you can patch them with a trivial patch, which
541 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
547 Select the kernel logical page size. Increasing the page size
548 will reduce software overhead at each page boundary, allow
549 hardware prefetch mechanisms to be more effective, and allow
550 larger dma transfers increasing IO efficiency and reducing
551 overhead. However the utilization of memory will increase.
552 For example, each cached file will using a multiple of the
553 page size to hold its contents and the difference between the
554 end of file and the end of page is wasted.
556 Some dedicated systems, such as software raid serving with
557 accelerated calculations, have shown significant increases.
559 If you configure a 64 bit kernel for 64k pages but the
560 processor does not support them, then the kernel will simulate
561 them with 4k pages, loading them on demand, but with the
562 reduced software overhead and larger internal fragmentation.
563 For the 32 bit kernel, a large page option will not be offered
564 unless it is supported by the configured processor.
566 If unsure, choose 4K_PAGES.
573 depends on 44x || PPC_8xx
577 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
579 config PPC_256K_PAGES
580 bool "256k page size"
581 depends on 44x && !STDBINUTILS
583 Make the page size 256k.
585 As the ELF standard only requires alignment to support page
586 sizes up to 64k, you will need to compile all of your user
587 space applications with a non-standard binutils settings
588 (see the STDBINUTILS description for details).
590 Say N unless you know what you are doing.
594 config FORCE_MAX_ZONEORDER
595 int "Maximum zone order"
596 range 9 64 if PPC64 && PPC_64K_PAGES
597 default "9" if PPC64 && PPC_64K_PAGES
598 range 13 64 if PPC64 && !PPC_64K_PAGES
599 default "13" if PPC64 && !PPC_64K_PAGES
600 range 9 64 if PPC32 && PPC_16K_PAGES
601 default "9" if PPC32 && PPC_16K_PAGES
602 range 7 64 if PPC32 && PPC_64K_PAGES
603 default "7" if PPC32 && PPC_64K_PAGES
604 range 5 64 if PPC32 && PPC_256K_PAGES
605 default "5" if PPC32 && PPC_256K_PAGES
609 The kernel memory allocator divides physically contiguous memory
610 blocks into "zones", where each zone is a power of two number of
611 pages. This option selects the largest power of two that the kernel
612 keeps in the memory allocator. If you need to allocate very large
613 blocks of physically contiguous memory, then you may need to
616 This config option is actually maximum order plus one. For example,
617 a value of 11 means that the largest free memory block is 2^10 pages.
619 The page size is not necessarily 4KB. For example, on 64-bit
620 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
621 this in mind when choosing a value for this option.
623 config PPC_SUBPAGE_PROT
624 bool "Support setting protections for 4k subpages"
625 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
627 This option adds support for a system call to allow user programs
628 to set access permissions (read/write, readonly, or no access)
629 on the 4k subpages of each 64k page.
631 config PPC_COPRO_BASE
636 bool "SMT (Hyperthreading) scheduler support"
637 depends on PPC64 && SMP
639 SMT scheduler support improves the CPU scheduler's decision making
640 when dealing with POWER5 cpus at a cost of slightly increased
641 overhead in some places. If unsure say N here.
643 config PPC_DENORMALISATION
644 bool "PowerPC denormalisation exception handling"
645 depends on PPC_BOOK3S_64
646 default "y" if PPC_POWERNV
648 Add support for handling denormalisation of single precision
649 values. Useful for bare metal only. If unsure say Y here.
652 bool "Default bootloader kernel arguments"
655 string "Initial kernel command string"
656 depends on CMDLINE_BOOL
657 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
659 On some platforms, there is currently no way for the boot loader to
660 pass arguments to the kernel. For these platforms, you can supply
661 some command-line options at build time by entering them here. In
662 most cases you will need to specify the root device here.
665 bool "Always use the default kernel command string"
666 depends on CMDLINE_BOOL
668 Always use the default kernel command string, even if the boot
669 loader passes other arguments to the kernel.
670 This is useful if you cannot or don't want to change the
671 command-line options your boot loader passes to the kernel.
674 string "Additional default image types"
676 List additional targets to be built by the bootwrapper here (separated
677 by spaces). This is useful for targets that depend of device tree
678 files in the .dts directory.
680 Targets in this list will be build as part of the default build
681 target, or when the user does a 'make zImage' or a
682 'make zImage.initrd'.
684 If unsure, leave blank
686 config ARCH_WANTS_FREEZER_CONTROL
690 source kernel/power/Kconfig
693 bool "Enable seccomp to safely compute untrusted bytecode"
697 This kernel feature is useful for number crunching applications
698 that may need to compute untrusted bytecode during their
699 execution. By using pipes or other transports made available to
700 the process as file descriptors supporting the read/write
701 syscalls, it's possible to isolate those applications in
702 their own address space using seccomp. Once seccomp is
703 enabled via /proc/<pid>/seccomp, it cannot be disabled
704 and the task is only allowed to execute a few safe syscalls
705 defined by each seccomp mode.
707 If unsure, say Y. Only embedded should say N here.
718 bool "Support for ISA-bus hardware"
722 Find out whether you have ISA slots on your motherboard. ISA is the
723 name of a bus system, i.e. the way the CPU talks to the other stuff
724 inside your box. If you have an Apple machine, say N here; if you
725 have an IBM RS/6000 or pSeries machine, say Y. If you have an
726 embedded board, consult your board documentation.
732 config NEED_DMA_MAP_STATE
733 def_bool (PPC64 || NOT_COHERENT_CACHE)
735 config NEED_SG_DMA_LENGTH
738 config GENERIC_ISA_DMA
740 depends on ISA_DMA_API
743 config PPC_INDIRECT_PCI
746 default y if 40x || 44x
760 select PPC_INDIRECT_PCI
766 depends on SUSPEND && (PPC_85xx || PPC_86xx)
768 Freescale MPC85xx/MPC86xx power management controller support
769 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
774 depends on SUSPEND && (44x || 40x)
776 PPC4xx Clock Power Management (CPM) support (suspend/resume).
777 It also enables support for two different idle states (idle-wait
784 bool "Freescale Local Bus support"
787 Enables reporting of errors from the Freescale local bus
788 controller. Also contains some common code used by
789 drivers for specific local bus peripherals.
793 depends on PPC_83xx || QUICC_ENGINE || CPM2
795 Freescale General-purpose Timers support
797 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
801 # Platforms that what PCI turned unconditionally just do select PCI
802 # in their config node. Platforms that want to choose at config
803 # time should select PPC_PCI_CHOICE
804 config PPC_PCI_CHOICE
808 bool "PCI support" if PPC_PCI_CHOICE
809 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
810 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
811 default PCI_QSPAN if !4xx && !CPM2 && 8xx
812 select GENERIC_PCI_IOMAP
814 Find out whether your system includes a PCI bus. PCI is the name of
815 a bus system, i.e. the way the CPU talks to the other stuff inside
816 your box. If you say Y here, the kernel will include drivers and
817 infrastructure code to support PCI bus devices.
827 depends on !4xx && !CPM2 && 8xx
830 Say Y here if you have a system based on a Motorola 8xx-series
831 embedded processor with a QSPAN PCI interface, otherwise say N.
835 depends on PCI && 8260
836 select PPC_INDIRECT_PCI
839 source "drivers/pci/pcie/Kconfig"
841 source "drivers/pci/Kconfig"
843 source "drivers/pcmcia/Kconfig"
845 source "drivers/pci/hotplug/Kconfig"
852 tristate "RapidIO support"
853 depends on HAS_RAPIDIO || PCI
855 If you say Y here, the kernel will include drivers and
856 infrastructure code to support RapidIO interconnect devices.
859 bool "Freescale Embedded SRIO Controller support"
860 depends on RAPIDIO = y && HAS_RAPIDIO
863 Include support for RapidIO controller on Freescale embedded
864 processors (MPC8548, MPC8641, etc).
866 source "drivers/rapidio/Kconfig"
870 config NONSTATIC_KERNEL
874 menu "Advanced setup"
877 config ADVANCED_OPTIONS
878 bool "Prompt for advanced kernel configuration options"
880 This option will enable prompting for a variety of advanced kernel
881 configuration options. These options can cause the kernel to not
882 work if they are set incorrectly, but can be used to optimize certain
883 aspects of kernel memory management.
885 Unless you know what you are doing, say N here.
887 comment "Default settings for advanced configuration options are used"
888 depends on !ADVANCED_OPTIONS
890 config LOWMEM_SIZE_BOOL
891 bool "Set maximum low memory"
892 depends on ADVANCED_OPTIONS
894 This option allows you to set the maximum amount of memory which
895 will be used as "low memory", that is, memory which the kernel can
896 access directly, without having to set up a kernel virtual mapping.
897 This can be useful in optimizing the layout of kernel virtual
900 Say N here unless you know what you are doing.
903 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
906 config LOWMEM_CAM_NUM_BOOL
907 bool "Set number of CAMs to use to map low memory"
908 depends on ADVANCED_OPTIONS && FSL_BOOKE
910 This option allows you to set the maximum number of CAM slots that
911 will be used to map low memory. There are a limited number of slots
912 available and even more limited number that will fit in the L1 MMU.
913 However, using more entries will allow mapping more low memory. This
914 can be useful in optimizing the layout of kernel virtual memory.
916 Say N here unless you know what you are doing.
918 config LOWMEM_CAM_NUM
920 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
923 config DYNAMIC_MEMSTART
924 bool "Enable page aligned dynamic load address for kernel"
925 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
926 select NONSTATIC_KERNEL
928 This option enables the kernel to be loaded at any page aligned
929 physical address. The kernel creates a mapping from KERNELBASE to
930 the address where the kernel is loaded. The page size here implies
931 the TLB page size of the mapping for kernel on the particular platform.
932 Please refer to the init code for finding the TLB page size.
934 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
935 kernel image, where the only restriction is the page aligned kernel
936 load address. When this option is enabled, the compile time physical
937 address CONFIG_PHYSICAL_START is ignored.
939 This option is overridden by CONFIG_RELOCATABLE
942 bool "Build a relocatable kernel"
943 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
944 select NONSTATIC_KERNEL
946 This builds a kernel image that is capable of running at the
947 location the kernel is loaded at, without any alignment restrictions.
948 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
950 One use is for the kexec on panic case where the recovery kernel
951 must live at a different physical address than the primary
954 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
955 it has been loaded at and the compile time physical addresses
956 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
957 setting can still be useful to bootwrappers that need to know the
958 load address of the kernel (eg. u-boot/mkimage).
960 config RELOCATABLE_PPC32
962 depends on PPC32 && RELOCATABLE
964 config PAGE_OFFSET_BOOL
965 bool "Set custom page offset address"
966 depends on ADVANCED_OPTIONS
968 This option allows you to set the kernel virtual address at which
969 the kernel will map low memory. This can be useful in optimizing
970 the virtual memory layout of the system.
972 Say N here unless you know what you are doing.
975 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
978 config KERNEL_START_BOOL
979 bool "Set custom kernel base address"
980 depends on ADVANCED_OPTIONS
982 This option allows you to set the kernel virtual address at which
983 the kernel will be loaded. Normally this should match PAGE_OFFSET
984 however there are times (like kdump) that one might not want them
987 Say N here unless you know what you are doing.
990 hex "Virtual address of kernel base" if KERNEL_START_BOOL
991 default PAGE_OFFSET if PAGE_OFFSET_BOOL
992 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
995 config PHYSICAL_START_BOOL
996 bool "Set physical address where the kernel is loaded"
997 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
999 This gives the physical address where the kernel is loaded.
1001 Say N here unless you know what you are doing.
1003 config PHYSICAL_START
1004 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1005 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1006 default "0x00000000"
1008 config PHYSICAL_ALIGN
1010 default "0x04000000" if FSL_BOOKE
1012 This value puts the alignment restrictions on physical address
1013 where kernel is loaded and run from. Kernel is compiled for an
1014 address which meets above alignment restriction.
1016 config TASK_SIZE_BOOL
1017 bool "Set custom user task size"
1018 depends on ADVANCED_OPTIONS
1020 This option allows you to set the amount of virtual address space
1021 allocated to user tasks. This can be useful in optimizing the
1022 virtual memory layout of the system.
1024 Say N here unless you know what you are doing.
1027 hex "Size of user task space" if TASK_SIZE_BOOL
1028 default "0x80000000" if PPC_8xx
1029 default "0xc0000000"
1031 config CONSISTENT_SIZE_BOOL
1032 bool "Set custom consistent memory pool size"
1033 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1035 This option allows you to set the size of the
1036 consistent memory pool. This pool of virtual memory
1037 is used to make consistent memory allocations.
1039 config CONSISTENT_SIZE
1040 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1041 default "0x00200000" if NOT_COHERENT_CACHE
1044 bool "Pinned Kernel TLBs (860 ONLY)"
1045 depends on ADVANCED_OPTIONS && 8xx
1050 bool "Build a relocatable kernel"
1051 depends on !COMPILE_TEST
1052 select NONSTATIC_KERNEL
1054 This builds a kernel image that is capable of running anywhere
1055 in the RMA (real memory area) at any 16k-aligned base address.
1056 The kernel is linked as a position-independent executable (PIE)
1057 and contains dynamic relocations which are processed early
1058 in the bootup process.
1060 One use is for the kexec on panic case where the recovery kernel
1061 must live at a different physical address than the primary
1064 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1067 default "0xc000000000000000"
1070 default "0xc000000000000000"
1071 config PHYSICAL_START
1073 default "0x00000000"
1079 source "net/Kconfig"
1081 source "drivers/Kconfig"
1085 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1087 source "lib/Kconfig"
1089 source "arch/powerpc/Kconfig.debug"
1091 source "security/Kconfig"
1093 source "crypto/Kconfig"
1095 config PPC_LIB_RHEAP
1098 source "arch/powerpc/kvm/Kconfig"