arch/powerpc/Kconfig

   1 # For a description of the syntax of this configuration file,
   2 # see Documentation/kbuild/kconfig-language.txt.
   3 #
   4
   5 mainmenu "Linux/PowerPC Kernel Configuration"
   6
   7 source "arch/powerpc/platforms/Kconfig.cputype"
   8
   9 config PPC32
  10         bool
  11         default y if !PPC64
  12
  13 config 64BIT
  14         bool
  15         default y if PPC64
  16
  17 config WORD_SIZE
  18         int
  19         default 64 if PPC64
  20         default 32 if !PPC64
  21
  22 config ARCH_PHYS_ADDR_T_64BIT
  23        def_bool PPC64 || PHYS_64BIT
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config GENERIC_CMOS_UPDATE
  30         def_bool y
  31
  32 config GENERIC_TIME
  33         def_bool y
  34
  35 config GENERIC_TIME_VSYSCALL
  36         def_bool y
  37
  38 config GENERIC_CLOCKEVENTS
  39         def_bool y
  40
  41 config GENERIC_HARDIRQS
  42         bool
  43         default y
  44
  45 config HAVE_SETUP_PER_CPU_AREA
  46         def_bool PPC64
  47
  48 config IRQ_PER_CPU
  49         bool
  50         default y
  51
  52 config STACKTRACE_SUPPORT
  53         bool
  54         default y
  55
  56 config HAVE_LATENCYTOP_SUPPORT
  57         def_bool y
  58
  59 config TRACE_IRQFLAGS_SUPPORT
  60         bool
  61         depends on PPC64
  62         default y
  63
  64 config LOCKDEP_SUPPORT
  65         bool
  66         default y
  67
  68 config RWSEM_GENERIC_SPINLOCK
  69         bool
  70
  71 config RWSEM_XCHGADD_ALGORITHM
  72         bool
  73         default y
  74
  75 config GENERIC_LOCKBREAK
  76         bool
  77         default y
  78         depends on SMP && PREEMPT
  79
  80 config ARCH_HAS_ILOG2_U32
  81         bool
  82         default y
  83
  84 config ARCH_HAS_ILOG2_U64
  85         bool
  86         default y if 64BIT
  87
  88 config GENERIC_HWEIGHT
  89         bool
  90         default y
  91
  92 config GENERIC_CALIBRATE_DELAY
  93         bool
  94         default y
  95
  96 config GENERIC_FIND_NEXT_BIT
  97         bool
  98         default y
  99
 100 config GENERIC_GPIO
 101         bool
 102         help
 103           Generic GPIO API support
 104
 105 config ARCH_NO_VIRT_TO_BUS
 106         def_bool PPC64
 107
 108 config PPC
 109         bool
 110         default y
 111         select HAVE_FTRACE_MCOUNT_RECORD
 112         select HAVE_DYNAMIC_FTRACE
 113         select HAVE_FUNCTION_TRACER
 114         select HAVE_FUNCTION_GRAPH_TRACER if PPC64 || !DYNAMIC_FTRACE
 115         select ARCH_WANT_OPTIONAL_GPIOLIB
 116         select HAVE_IDE
 117         select HAVE_IOREMAP_PROT
 118         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 119         select HAVE_KPROBES
 120         select HAVE_ARCH_KGDB
 121         select HAVE_KRETPROBES
 122         select HAVE_ARCH_TRACEHOOK
 123         select HAVE_LMB
 124         select HAVE_DMA_ATTRS if PPC64
 125         select USE_GENERIC_SMP_HELPERS if SMP
 126         select HAVE_OPROFILE
 127         select HAVE_SYSCALL_WRAPPERS if PPC64
 128
 129 config EARLY_PRINTK
 130         bool
 131         default y
 132
 133 config COMPAT
 134         bool
 135         default y if PPC64
 136         select COMPAT_BINFMT_ELF
 137
 138 config SYSVIPC_COMPAT
 139         bool
 140         depends on COMPAT && SYSVIPC
 141         default y
 142
 143 # All PPC32s use generic nvram driver through ppc_md
 144 config GENERIC_NVRAM
 145         bool
 146         default y if PPC32
 147
 148 config SCHED_OMIT_FRAME_POINTER
 149         bool
 150         default y
 151
 152 config ARCH_MAY_HAVE_PC_FDC
 153         bool
 154         default !PPC_PSERIES || PCI
 155
 156 config PPC_OF
 157         def_bool y
 158
 159 config OF
 160         def_bool y
 161
 162 config PPC_UDBG_16550
 163         bool
 164         default n
 165
 166 config GENERIC_TBSYNC
 167         bool
 168         default y if PPC32 && SMP
 169         default n
 170
 171 config AUDIT_ARCH
 172         bool
 173         default y
 174
 175 config GENERIC_BUG
 176         bool
 177         default y
 178         depends on BUG
 179
 180 config SYS_SUPPORTS_APM_EMULATION
 181         default y if PMAC_APM_EMU
 182         bool
 183
 184 config DEFAULT_UIMAGE
 185         bool
 186         help
 187           Used to allow a board to specify it wants a uImage built by default
 188         default n
 189
 190 config REDBOOT
 191         bool
 192
 193 config HIBERNATE_32
 194         bool
 195         depends on (PPC_PMAC && !SMP) || BROKEN
 196         default y
 197
 198 config HIBERNATE_64
 199         bool
 200         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 201         default y
 202
 203 config ARCH_HIBERNATION_POSSIBLE
 204         bool
 205         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 206         default y
 207
 208 config ARCH_SUSPEND_POSSIBLE
 209         def_bool y
 210         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
 211
 212 config PPC_DCR_NATIVE
 213         bool
 214         default n
 215
 216 config PPC_DCR_MMIO
 217         bool
 218         default n
 219
 220 config PPC_DCR
 221         bool
 222         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 223         default y
 224
 225 config PPC_OF_PLATFORM_PCI
 226         bool
 227         depends on PCI
 228         depends on PPC64 # not supported on 32 bits yet
 229         default n
 230
 231 source "init/Kconfig"
 232
 233 source "kernel/Kconfig.freezer"
 234
 235 source "arch/powerpc/sysdev/Kconfig"
 236 source "arch/powerpc/platforms/Kconfig"
 237
 238 menu "Kernel options"
 239
 240 config HIGHMEM
 241         bool "High memory support"
 242         depends on PPC32
 243
 244 source kernel/time/Kconfig
 245 source kernel/Kconfig.hz
 246 source kernel/Kconfig.preempt
 247 source "fs/Kconfig.binfmt"
 248
 249 config HUGETLB_PAGE_SIZE_VARIABLE
 250         bool
 251         depends on HUGETLB_PAGE
 252         default y
 253
 254 config MATH_EMULATION
 255         bool "Math emulation"
 256         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 257         ---help---
 258           Some PowerPC chips designed for embedded applications do not have
 259           a floating-point unit and therefore do not implement the
 260           floating-point instructions in the PowerPC instruction set.  If you
 261           say Y here, the kernel will include code to emulate a floating-point
 262           unit, which will allow programs that use floating-point
 263           instructions to run.
 264
 265 config 8XX_MINIMAL_FPEMU
 266         bool "Minimal math emulation for 8xx"
 267         depends on 8xx && !MATH_EMULATION
 268         help
 269           Older arch/ppc kernels still emulated a few floating point
 270           instructions such as load and store, even when full math
 271           emulation is disabled.  Say "Y" here if you want to preserve
 272           this behavior.
 273
 274           It is recommended that you build a soft-float userspace instead.
 275
 276 config IOMMU_VMERGE
 277         bool "Enable IOMMU virtual merging"
 278         depends on PPC64
 279         default y
 280         help
 281           Cause IO segments sent to a device for DMA to be merged virtually
 282           by the IOMMU when they happen to have been allocated contiguously.
 283           This doesn't add pressure to the IOMMU allocator. However, some
 284           drivers don't support getting large merged segments coming back
 285           from *_map_sg().
 286
 287           Most drivers don't have this problem; it is safe to say Y here.
 288
 289 config IOMMU_HELPER
 290         def_bool PPC64
 291
 292 config PPC_NEED_DMA_SYNC_OPS
 293         def_bool y
 294         depends on NOT_COHERENT_CACHE
 295
 296 config HOTPLUG_CPU
 297         bool "Support for enabling/disabling CPUs"
 298         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 299         ---help---
 300           Say Y here to be able to disable and re-enable individual
 301           CPUs at runtime on SMP machines.
 302
 303           Say N if you are unsure.
 304
 305 config ARCH_ENABLE_MEMORY_HOTPLUG
 306         def_bool y
 307
 308 config ARCH_HAS_WALK_MEMORY
 309         def_bool y
 310
 311 config ARCH_ENABLE_MEMORY_HOTREMOVE
 312         def_bool y
 313
 314 config KEXEC
 315         bool "kexec system call (EXPERIMENTAL)"
 316         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 317         help
 318           kexec is a system call that implements the ability to shutdown your
 319           current kernel, and to start another kernel.  It is like a reboot
 320           but it is independent of the system firmware.   And like a reboot
 321           you can start any kernel with it, not just Linux.
 322
 323           The name comes from the similarity to the exec system call.
 324
 325           It is an ongoing process to be certain the hardware in a machine
 326           is properly shutdown, so do not be surprised if this code does not
 327           initially work for you.  It may help to enable device hotplugging
 328           support.  As of this writing the exact hardware interface is
 329           strongly in flux, so no good recommendation can be made.
 330
 331 config CRASH_DUMP
 332         bool "Build a kdump crash kernel"
 333         depends on PPC64 || 6xx
 334         select RELOCATABLE if PPC64
 335         help
 336           Build a kernel suitable for use as a kdump capture kernel.
 337           The same kernel binary can be used as production kernel and dump
 338           capture kernel.
 339
 340 config PHYP_DUMP
 341         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 342         depends on PPC_PSERIES && EXPERIMENTAL
 343         help
 344           Hypervisor-assisted dump is meant to be a kdump replacement
 345           offering robustness and speed not possible without system
 346           hypervisor assistence.
 347
 348           If unsure, say "N"
 349
 350 config PPCBUG_NVRAM
 351         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 352         default y if PPC_PREP
 353
 354 config IRQ_ALL_CPUS
 355         bool "Distribute interrupts on all CPUs by default"
 356         depends on SMP && !MV64360
 357         help
 358           This option gives the kernel permission to distribute IRQs across
 359           multiple CPUs.  Saying N here will route all IRQs to the first
 360           CPU.  Generally saying Y is safe, although some problems have been
 361           reported with SMP Power Macintoshes with this option enabled.
 362
 363 config NUMA
 364         bool "NUMA support"
 365         depends on PPC64
 366         default y if SMP && PPC_PSERIES
 367
 368 config NODES_SHIFT
 369         int
 370         default "4"
 371         depends on NEED_MULTIPLE_NODES
 372
 373 config ARCH_SELECT_MEMORY_MODEL
 374         def_bool y
 375         depends on PPC64
 376
 377 config ARCH_FLATMEM_ENABLE
 378         def_bool y
 379         depends on (PPC64 && !NUMA) || PPC32
 380
 381 config ARCH_SPARSEMEM_ENABLE
 382         def_bool y
 383         depends on PPC64
 384         select SPARSEMEM_VMEMMAP_ENABLE
 385
 386 config ARCH_SPARSEMEM_DEFAULT
 387         def_bool y
 388         depends on (SMP && PPC_PSERIES) || PPC_PS3
 389
 390 config ARCH_POPULATES_NODE_MAP
 391         def_bool y
 392
 393 source "mm/Kconfig"
 394
 395 config ARCH_MEMORY_PROBE
 396         def_bool y
 397         depends on MEMORY_HOTPLUG
 398
 399 # Some NUMA nodes have memory ranges that span
 400 # other nodes.  Even though a pfn is valid and
 401 # between a node's start and end pfns, it may not
 402 # reside on that node.  See memmap_init_zone()
 403 # for details.
 404 config NODES_SPAN_OTHER_NODES
 405         def_bool y
 406         depends on NEED_MULTIPLE_NODES
 407
 408 config PPC_HAS_HASH_64K
 409         bool
 410         depends on PPC64
 411         default n
 412
 413 choice
 414         prompt "Page size"
 415         default PPC_4K_PAGES
 416         help
 417           Select the kernel logical page size. Increasing the page size
 418           will reduce software overhead at each page boundary, allow
 419           hardware prefetch mechanisms to be more effective, and allow
 420           larger dma transfers increasing IO efficiency and reducing
 421           overhead. However the utilization of memory will increase.
 422           For example, each cached file will using a multiple of the
 423           page size to hold its contents and the difference between the
 424           end of file and the end of page is wasted.
 425
 426           Some dedicated systems, such as software raid serving with
 427           accelerated calculations, have shown significant increases.
 428
 429           If you configure a 64 bit kernel for 64k pages but the
 430           processor does not support them, then the kernel will simulate
 431           them with 4k pages, loading them on demand, but with the
 432           reduced software overhead and larger internal fragmentation.
 433           For the 32 bit kernel, a large page option will not be offered
 434           unless it is supported by the configured processor.
 435
 436           If unsure, choose 4K_PAGES.
 437
 438 config PPC_4K_PAGES
 439         bool "4k page size"
 440
 441 config PPC_16K_PAGES
 442         bool "16k page size" if 44x
 443
 444 config PPC_64K_PAGES
 445         bool "64k page size" if 44x || PPC_STD_MMU_64
 446         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 447
 448 endchoice
 449
 450 config FORCE_MAX_ZONEORDER
 451         int "Maximum zone order"
 452         range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
 453         default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
 454         range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
 455         default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
 456         range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
 457         default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
 458         range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
 459         default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
 460         range 11 64
 461         default "11"
 462         help
 463           The kernel memory allocator divides physically contiguous memory
 464           blocks into "zones", where each zone is a power of two number of
 465           pages.  This option selects the largest power of two that the kernel
 466           keeps in the memory allocator.  If you need to allocate very large
 467           blocks of physically contiguous memory, then you may need to
 468           increase this value.
 469
 470           This config option is actually maximum order plus one. For example,
 471           a value of 11 means that the largest free memory block is 2^10 pages.
 472
 473           The page size is not necessarily 4KB.  For example, on 64-bit
 474           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 475           this in mind when choosing a value for this option.
 476
 477 config PPC_SUBPAGE_PROT
 478         bool "Support setting protections for 4k subpages"
 479         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 480         help
 481           This option adds support for a system call to allow user programs
 482           to set access permissions (read/write, readonly, or no access)
 483           on the 4k subpages of each 64k page.
 484
 485 config SCHED_SMT
 486         bool "SMT (Hyperthreading) scheduler support"
 487         depends on PPC64 && SMP
 488         help
 489           SMT scheduler support improves the CPU scheduler's decision making
 490           when dealing with POWER5 cpus at a cost of slightly increased
 491           overhead in some places. If unsure say N here.
 492
 493 config PROC_DEVICETREE
 494         bool "Support for device tree in /proc"
 495         depends on PROC_FS
 496         help
 497           This option adds a device-tree directory under /proc which contains
 498           an image of the device tree that the kernel copies from Open
 499           Firmware or other boot firmware. If unsure, say Y here.
 500
 501 config CMDLINE_BOOL
 502         bool "Default bootloader kernel arguments"
 503
 504 config CMDLINE
 505         string "Initial kernel command string"
 506         depends on CMDLINE_BOOL
 507         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 508         help
 509           On some platforms, there is currently no way for the boot loader to
 510           pass arguments to the kernel. For these platforms, you can supply
 511           some command-line options at build time by entering them here.  In
 512           most cases you will need to specify the root device here.
 513
 514 config EXTRA_TARGETS
 515         string "Additional default image types"
 516         help
 517           List additional targets to be built by the bootwrapper here (separated
 518           by spaces).  This is useful for targets that depend of device tree
 519           files in the .dts directory.
 520
 521           Targets in this list will be build as part of the default build
 522           target, or when the user does a 'make zImage' or a
 523           'make zImage.initrd'.
 524
 525           If unsure, leave blank
 526
 527 if !44x || BROKEN
 528 config ARCH_WANTS_FREEZER_CONTROL
 529         def_bool y
 530         depends on ADB_PMU
 531
 532 source kernel/power/Kconfig
 533 endif
 534
 535 config SECCOMP
 536         bool "Enable seccomp to safely compute untrusted bytecode"
 537         depends on PROC_FS
 538         default y
 539         help
 540           This kernel feature is useful for number crunching applications
 541           that may need to compute untrusted bytecode during their
 542           execution. By using pipes or other transports made available to
 543           the process as file descriptors supporting the read/write
 544           syscalls, it's possible to isolate those applications in
 545           their own address space using seccomp. Once seccomp is
 546           enabled via /proc/<pid>/seccomp, it cannot be disabled
 547           and the task is only allowed to execute a few safe syscalls
 548           defined by each seccomp mode.
 549
 550           If unsure, say Y. Only embedded should say N here.
 551
 552 endmenu
 553
 554 config ISA_DMA_API
 555         bool
 556         default !PPC_ISERIES || PCI
 557
 558 menu "Bus options"
 559
 560 config ISA
 561         bool "Support for ISA-bus hardware"
 562         depends on PPC_PREP || PPC_CHRP
 563         select PPC_I8259
 564         help
 565           Find out whether you have ISA slots on your motherboard.  ISA is the
 566           name of a bus system, i.e. the way the CPU talks to the other stuff
 567           inside your box.  If you have an Apple machine, say N here; if you
 568           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 569           you have an embedded board, consult your board documentation.
 570
 571 config ZONE_DMA
 572         bool
 573         default y
 574
 575 config GENERIC_ISA_DMA
 576         bool
 577         depends on PPC64 || POWER4 || 6xx && !CPM2
 578         default y
 579
 580 config PPC_INDIRECT_PCI
 581         bool
 582         depends on PCI
 583         default y if 40x || 44x
 584         default n
 585
 586 config EISA
 587         bool
 588
 589 config SBUS
 590         bool
 591
 592 config FSL_SOC
 593         bool
 594
 595 config FSL_PCI
 596         bool
 597         select PPC_INDIRECT_PCI
 598         select PCI_QUIRKS
 599
 600 config 4xx_SOC
 601         bool
 602
 603 config FSL_LBC
 604         bool
 605         help
 606           Freescale Localbus support
 607
 608 config FSL_GTM
 609         bool
 610         depends on PPC_83xx || QUICC_ENGINE || CPM2
 611         help
 612           Freescale General-purpose Timers support
 613
 614 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 615 config MCA
 616         bool
 617
 618 # Platforms that what PCI turned unconditionally just do select PCI
 619 # in their config node.  Platforms that want to choose at config
 620 # time should select PPC_PCI_CHOICE
 621 config PPC_PCI_CHOICE
 622         bool
 623
 624 config PCI
 625         bool "PCI support" if PPC_PCI_CHOICE
 626         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 627                 && !PPC_85xx && !PPC_86xx
 628         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 629         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 630         select ARCH_SUPPORTS_MSI
 631         help
 632           Find out whether your system includes a PCI bus. PCI is the name of
 633           a bus system, i.e. the way the CPU talks to the other stuff inside
 634           your box.  If you say Y here, the kernel will include drivers and
 635           infrastructure code to support PCI bus devices.
 636
 637 config PCI_DOMAINS
 638         def_bool PCI
 639
 640 config PCI_SYSCALL
 641         def_bool PCI
 642
 643 config PCI_QSPAN
 644         bool "QSpan PCI"
 645         depends on !4xx && !CPM2 && 8xx
 646         select PPC_I8259
 647         help
 648           Say Y here if you have a system based on a Motorola 8xx-series
 649           embedded processor with a QSPAN PCI interface, otherwise say N.
 650
 651 config PCI_8260
 652         bool
 653         depends on PCI && 8260
 654         select PPC_INDIRECT_PCI
 655         default y
 656
 657 config 8260_PCI9
 658         bool "Enable workaround for MPC826x erratum PCI 9"
 659         depends on PCI_8260 && !8272
 660         default y
 661
 662 choice
 663         prompt "IDMA channel for PCI 9 workaround"
 664         depends on 8260_PCI9
 665
 666 config 8260_PCI9_IDMA1
 667         bool "IDMA1"
 668
 669 config 8260_PCI9_IDMA2
 670         bool "IDMA2"
 671
 672 config 8260_PCI9_IDMA3
 673         bool "IDMA3"
 674
 675 config 8260_PCI9_IDMA4
 676         bool "IDMA4"
 677
 678 endchoice
 679
 680 source "drivers/pci/pcie/Kconfig"
 681
 682 source "drivers/pci/Kconfig"
 683
 684 source "drivers/pcmcia/Kconfig"
 685
 686 source "drivers/pci/hotplug/Kconfig"
 687
 688 config HAS_RAPIDIO
 689         bool
 690         default n
 691
 692 config RAPIDIO
 693         bool "RapidIO support"
 694         depends on HAS_RAPIDIO
 695         help
 696           If you say Y here, the kernel will include drivers and
 697           infrastructure code to support RapidIO interconnect devices.
 698
 699 source "drivers/rapidio/Kconfig"
 700
 701 endmenu
 702
 703 menu "Advanced setup"
 704         depends on PPC32
 705
 706 config ADVANCED_OPTIONS
 707         bool "Prompt for advanced kernel configuration options"
 708         help
 709           This option will enable prompting for a variety of advanced kernel
 710           configuration options.  These options can cause the kernel to not
 711           work if they are set incorrectly, but can be used to optimize certain
 712           aspects of kernel memory management.
 713
 714           Unless you know what you are doing, say N here.
 715
 716 comment "Default settings for advanced configuration options are used"
 717         depends on !ADVANCED_OPTIONS
 718
 719 config LOWMEM_SIZE_BOOL
 720         bool "Set maximum low memory"
 721         depends on ADVANCED_OPTIONS
 722         help
 723           This option allows you to set the maximum amount of memory which
 724           will be used as "low memory", that is, memory which the kernel can
 725           access directly, without having to set up a kernel virtual mapping.
 726           This can be useful in optimizing the layout of kernel virtual
 727           memory.
 728
 729           Say N here unless you know what you are doing.
 730
 731 config LOWMEM_SIZE
 732         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 733         default "0x30000000"
 734
 735 config LOWMEM_CAM_NUM_BOOL
 736         bool "Set number of CAMs to use to map low memory"
 737         depends on ADVANCED_OPTIONS && FSL_BOOKE
 738         help
 739           This option allows you to set the maximum number of CAM slots that
 740           will be used to map low memory.  There are a limited number of slots
 741           available and even more limited number that will fit in the L1 MMU.
 742           However, using more entries will allow mapping more low memory.  This
 743           can be useful in optimizing the layout of kernel virtual memory.
 744
 745           Say N here unless you know what you are doing.
 746
 747 config LOWMEM_CAM_NUM
 748         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 749         default 3
 750
 751 config RELOCATABLE
 752         bool "Build a relocatable kernel (EXPERIMENTAL)"
 753         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 754         help
 755           This builds a kernel image that is capable of running at the
 756           location the kernel is loaded at (some alignment restrictions may
 757           exist).
 758
 759           One use is for the kexec on panic case where the recovery kernel
 760           must live at a different physical address than the primary
 761           kernel.
 762
 763           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 764           it has been loaded at and the compile time physical addresses
 765           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 766           setting can still be useful to bootwrappers that need to know the
 767           load location of the kernel (eg. u-boot/mkimage).
 768
 769 config PAGE_OFFSET_BOOL
 770         bool "Set custom page offset address"
 771         depends on ADVANCED_OPTIONS
 772         help
 773           This option allows you to set the kernel virtual address at which
 774           the kernel will map low memory.  This can be useful in optimizing
 775           the virtual memory layout of the system.
 776
 777           Say N here unless you know what you are doing.
 778
 779 config PAGE_OFFSET
 780         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 781         default "0xc0000000"
 782
 783 config KERNEL_START_BOOL
 784         bool "Set custom kernel base address"
 785         depends on ADVANCED_OPTIONS
 786         help
 787           This option allows you to set the kernel virtual address at which
 788           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 789           however there are times (like kdump) that one might not want them
 790           to be the same.
 791
 792           Say N here unless you know what you are doing.
 793
 794 config KERNEL_START
 795         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 796         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 797         default "0xc2000000" if CRASH_DUMP
 798         default "0xc0000000"
 799
 800 config PHYSICAL_START_BOOL
 801         bool "Set physical address where the kernel is loaded"
 802         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 803         help
 804           This gives the physical address where the kernel is loaded.
 805
 806           Say N here unless you know what you are doing.
 807
 808 config PHYSICAL_START
 809         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 810         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 811         default "0x00000000"
 812
 813 config PHYSICAL_ALIGN
 814         hex
 815         default "0x04000000" if FSL_BOOKE
 816         help
 817           This value puts the alignment restrictions on physical address
 818           where kernel is loaded and run from. Kernel is compiled for an
 819           address which meets above alignment restriction.
 820
 821 config TASK_SIZE_BOOL
 822         bool "Set custom user task size"
 823         depends on ADVANCED_OPTIONS
 824         help
 825           This option allows you to set the amount of virtual address space
 826           allocated to user tasks.  This can be useful in optimizing the
 827           virtual memory layout of the system.
 828
 829           Say N here unless you know what you are doing.
 830
 831 config TASK_SIZE
 832         hex "Size of user task space" if TASK_SIZE_BOOL
 833         default "0x80000000" if PPC_PREP || PPC_8xx
 834         default "0xc0000000"
 835
 836 config CONSISTENT_START_BOOL
 837         bool "Set custom consistent memory pool address"
 838         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 839         help
 840           This option allows you to set the base virtual address
 841           of the consistent memory pool.  This pool of virtual
 842           memory is used to make consistent memory allocations.
 843
 844 config CONSISTENT_START
 845         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 846         default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
 847         default "0xff100000" if NOT_COHERENT_CACHE
 848
 849 config CONSISTENT_SIZE_BOOL
 850         bool "Set custom consistent memory pool size"
 851         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 852         help
 853           This option allows you to set the size of the
 854           consistent memory pool.  This pool of virtual memory
 855           is used to make consistent memory allocations.
 856
 857 config CONSISTENT_SIZE
 858         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 859         default "0x00200000" if NOT_COHERENT_CACHE
 860
 861 config PIN_TLB
 862         bool "Pinned Kernel TLBs (860 ONLY)"
 863         depends on ADVANCED_OPTIONS && 8xx
 864 endmenu
 865
 866 if PPC64
 867 config RELOCATABLE
 868         bool "Build a relocatable kernel"
 869         help
 870           This builds a kernel image that is capable of running anywhere
 871           in the RMA (real memory area) at any 16k-aligned base address.
 872           The kernel is linked as a position-independent executable (PIE)
 873           and contains dynamic relocations which are processed early
 874           in the bootup process.
 875
 876           One use is for the kexec on panic case where the recovery kernel
 877           must live at a different physical address than the primary
 878           kernel.
 879
 880 config PAGE_OFFSET
 881         hex
 882         default "0xc000000000000000"
 883 config KERNEL_START
 884         hex
 885         default "0xc000000000000000"
 886 config PHYSICAL_START
 887         hex
 888         default "0x00000000"
 889 endif
 890
 891 source "net/Kconfig"
 892
 893 source "drivers/Kconfig"
 894
 895 source "fs/Kconfig"
 896
 897 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 898
 899 source "lib/Kconfig"
 900
 901 source "arch/powerpc/Kconfig.debug"
 902
 903 source "security/Kconfig"
 904
 905 config KEYS_COMPAT
 906         bool
 907         depends on COMPAT && KEYS
 908         default y
 909
 910 source "crypto/Kconfig"
 911
 912 config PPC_CLOCK
 913         bool
 914         default n
 915         select HAVE_CLK
 916
 917 config PPC_LIB_RHEAP
 918         bool
 919
 920 source "arch/powerpc/kvm/Kconfig"