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 PPC_MERGE
  23         def_bool y
  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_IDE
 112         select HAVE_OPROFILE
 113         select HAVE_KPROBES
 114         select HAVE_KRETPROBES
 115         select HAVE_LMB
 116         select HAVE_DMA_ATTRS if PPC64
 117
 118 config EARLY_PRINTK
 119         bool
 120         default y
 121
 122 config COMPAT
 123         bool
 124         default y if PPC64
 125         select COMPAT_BINFMT_ELF
 126
 127 config SYSVIPC_COMPAT
 128         bool
 129         depends on COMPAT && SYSVIPC
 130         default y
 131
 132 # All PPC32s use generic nvram driver through ppc_md
 133 config GENERIC_NVRAM
 134         bool
 135         default y if PPC32
 136
 137 config SCHED_NO_NO_OMIT_FRAME_POINTER
 138         bool
 139         default y
 140
 141 config ARCH_MAY_HAVE_PC_FDC
 142         bool
 143         default !PPC_PSERIES || PCI
 144
 145 config PPC_OF
 146         def_bool y
 147
 148 config OF
 149         def_bool y
 150
 151 config PPC_UDBG_16550
 152         bool
 153         default n
 154
 155 config GENERIC_TBSYNC
 156         bool
 157         default y if PPC32 && SMP
 158         default n
 159
 160 config AUDIT_ARCH
 161         bool
 162         default y
 163
 164 config GENERIC_BUG
 165         bool
 166         default y
 167         depends on BUG
 168
 169 config SYS_SUPPORTS_APM_EMULATION
 170         default y if PMAC_APM_EMU
 171         bool
 172
 173 config DEFAULT_UIMAGE
 174         bool
 175         help
 176           Used to allow a board to specify it wants a uImage built by default
 177         default n
 178
 179 config REDBOOT
 180         bool
 181
 182 config HIBERNATE_32
 183         bool
 184         depends on (PPC_PMAC && !SMP) || BROKEN
 185         default y
 186
 187 config HIBERNATE_64
 188         bool
 189         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 190         default y
 191
 192 config ARCH_HIBERNATION_POSSIBLE
 193         bool
 194         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 195         default y
 196
 197 config ARCH_SUSPEND_POSSIBLE
 198         def_bool y
 199         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
 200
 201 config PPC_DCR_NATIVE
 202         bool
 203         default n
 204
 205 config PPC_DCR_MMIO
 206         bool
 207         default n
 208
 209 config PPC_DCR
 210         bool
 211         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 212         default y
 213
 214 config PPC_OF_PLATFORM_PCI
 215         bool
 216         depends on PCI
 217         depends on PPC64 # not supported on 32 bits yet
 218         default n
 219
 220 source "init/Kconfig"
 221
 222 source "arch/powerpc/sysdev/Kconfig"
 223 source "arch/powerpc/platforms/Kconfig"
 224
 225 menu "Kernel options"
 226
 227 config HIGHMEM
 228         bool "High memory support"
 229         depends on PPC32
 230
 231 source kernel/time/Kconfig
 232 source kernel/Kconfig.hz
 233 source kernel/Kconfig.preempt
 234 source "fs/Kconfig.binfmt"
 235
 236 config HUGETLB_PAGE_SIZE_VARIABLE
 237         bool
 238         depends on HUGETLB_PAGE
 239         default y
 240
 241 config MATH_EMULATION
 242         bool "Math emulation"
 243         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 244         ---help---
 245           Some PowerPC chips designed for embedded applications do not have
 246           a floating-point unit and therefore do not implement the
 247           floating-point instructions in the PowerPC instruction set.  If you
 248           say Y here, the kernel will include code to emulate a floating-point
 249           unit, which will allow programs that use floating-point
 250           instructions to run.
 251
 252 config 8XX_MINIMAL_FPEMU
 253         bool "Minimal math emulation for 8xx"
 254         depends on 8xx && !MATH_EMULATION
 255         help
 256           Older arch/ppc kernels still emulated a few floating point
 257           instructions such as load and store, even when full math
 258           emulation is disabled.  Say "Y" here if you want to preserve
 259           this behavior.
 260
 261           It is recommended that you build a soft-float userspace instead.
 262
 263 config IOMMU_VMERGE
 264         bool "Enable IOMMU virtual merging"
 265         depends on PPC64
 266         default y
 267         help
 268           Cause IO segments sent to a device for DMA to be merged virtually
 269           by the IOMMU when they happen to have been allocated contiguously.
 270           This doesn't add pressure to the IOMMU allocator. However, some
 271           drivers don't support getting large merged segments coming back
 272           from *_map_sg().
 273
 274           Most drivers don't have this problem; it is safe to say Y here.
 275
 276 config IOMMU_HELPER
 277         def_bool PPC64
 278
 279 config HOTPLUG_CPU
 280         bool "Support for enabling/disabling CPUs"
 281         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 282         ---help---
 283           Say Y here to be able to disable and re-enable individual
 284           CPUs at runtime on SMP machines.
 285
 286           Say N if you are unsure.
 287
 288 config ARCH_ENABLE_MEMORY_HOTPLUG
 289         def_bool y
 290
 291 config ARCH_HAS_WALK_MEMORY
 292         def_bool y
 293
 294 config ARCH_ENABLE_MEMORY_HOTREMOVE
 295         def_bool y
 296
 297 config KEXEC
 298         bool "kexec system call (EXPERIMENTAL)"
 299         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 300         help
 301           kexec is a system call that implements the ability to shutdown your
 302           current kernel, and to start another kernel.  It is like a reboot
 303           but it is independent of the system firmware.   And like a reboot
 304           you can start any kernel with it, not just Linux.
 305
 306           The name comes from the similarity to the exec system call.
 307
 308           It is an ongoing process to be certain the hardware in a machine
 309           is properly shutdown, so do not be surprised if this code does not
 310           initially work for you.  It may help to enable device hotplugging
 311           support.  As of this writing the exact hardware interface is
 312           strongly in flux, so no good recommendation can be made.
 313
 314 config CRASH_DUMP
 315         bool "Build a kdump crash kernel"
 316         depends on PPC_MULTIPLATFORM && PPC64
 317         help
 318           Build a kernel suitable for use as a kdump capture kernel.
 319           The kernel will be linked at a different address than normal, and
 320           so can only be used for Kdump.
 321
 322           Don't change this unless you know what you are doing.
 323
 324 config PHYP_DUMP
 325         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 326         depends on PPC_PSERIES && EXPERIMENTAL
 327         help
 328           Hypervisor-assisted dump is meant to be a kdump replacement
 329           offering robustness and speed not possible without system
 330           hypervisor assistence.
 331
 332           If unsure, say "N"
 333
 334 config PPCBUG_NVRAM
 335         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 336         default y if PPC_PREP
 337
 338 config IRQ_ALL_CPUS
 339         bool "Distribute interrupts on all CPUs by default"
 340         depends on SMP && !MV64360
 341         help
 342           This option gives the kernel permission to distribute IRQs across
 343           multiple CPUs.  Saying N here will route all IRQs to the first
 344           CPU.  Generally saying Y is safe, although some problems have been
 345           reported with SMP Power Macintoshes with this option enabled.
 346
 347 config NUMA
 348         bool "NUMA support"
 349         depends on PPC64
 350         default y if SMP && PPC_PSERIES
 351
 352 config NODES_SHIFT
 353         int
 354         default "4"
 355         depends on NEED_MULTIPLE_NODES
 356
 357 config ARCH_SELECT_MEMORY_MODEL
 358         def_bool y
 359         depends on PPC64
 360
 361 config ARCH_FLATMEM_ENABLE
 362         def_bool y
 363         depends on (PPC64 && !NUMA) || PPC32
 364
 365 config ARCH_SPARSEMEM_ENABLE
 366         def_bool y
 367         depends on PPC64
 368         select SPARSEMEM_VMEMMAP_ENABLE
 369
 370 config ARCH_SPARSEMEM_DEFAULT
 371         def_bool y
 372         depends on (SMP && PPC_PSERIES) || PPC_PS3
 373
 374 config ARCH_POPULATES_NODE_MAP
 375         def_bool y
 376
 377 source "mm/Kconfig"
 378
 379 config ARCH_MEMORY_PROBE
 380         def_bool y
 381         depends on MEMORY_HOTPLUG
 382
 383 # Some NUMA nodes have memory ranges that span
 384 # other nodes.  Even though a pfn is valid and
 385 # between a node's start and end pfns, it may not
 386 # reside on that node.  See memmap_init_zone()
 387 # for details.
 388 config NODES_SPAN_OTHER_NODES
 389         def_bool y
 390         depends on NEED_MULTIPLE_NODES
 391
 392 config PPC_HAS_HASH_64K
 393         bool
 394         depends on PPC64
 395         default n
 396
 397 config PPC_64K_PAGES
 398         bool "64k page size"
 399         depends on PPC64
 400         select PPC_HAS_HASH_64K
 401         help
 402           This option changes the kernel logical page size to 64k. On machines
 403           without processor support for 64k pages, the kernel will simulate
 404           them by loading each individual 4k page on demand transparently,
 405           while on hardware with such support, it will be used to map
 406           normal application pages.
 407
 408 config FORCE_MAX_ZONEORDER
 409         int "Maximum zone order"
 410         default "9" if PPC_64K_PAGES
 411         default "13" if PPC64 && !PPC_64K_PAGES
 412         default "11"
 413         help
 414           The kernel memory allocator divides physically contiguous memory
 415           blocks into "zones", where each zone is a power of two number of
 416           pages.  This option selects the largest power of two that the kernel
 417           keeps in the memory allocator.  If you need to allocate very large
 418           blocks of physically contiguous memory, then you may need to
 419           increase this value.
 420
 421           This config option is actually maximum order plus one. For example,
 422           a value of 11 means that the largest free memory block is 2^10 pages.
 423
 424           The page size is not necessarily 4KB.  For example, on 64-bit
 425           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 426           this in mind when choosing a value for this option.
 427
 428 config PPC_SUBPAGE_PROT
 429         bool "Support setting protections for 4k subpages"
 430         depends on PPC_64K_PAGES
 431         help
 432           This option adds support for a system call to allow user programs
 433           to set access permissions (read/write, readonly, or no access)
 434           on the 4k subpages of each 64k page.
 435
 436 config SCHED_SMT
 437         bool "SMT (Hyperthreading) scheduler support"
 438         depends on PPC64 && SMP
 439         help
 440           SMT scheduler support improves the CPU scheduler's decision making
 441           when dealing with POWER5 cpus at a cost of slightly increased
 442           overhead in some places. If unsure say N here.
 443
 444 config PROC_DEVICETREE
 445         bool "Support for device tree in /proc"
 446         depends on PROC_FS
 447         help
 448           This option adds a device-tree directory under /proc which contains
 449           an image of the device tree that the kernel copies from Open
 450           Firmware or other boot firmware. If unsure, say Y here.
 451
 452 config CMDLINE_BOOL
 453         bool "Default bootloader kernel arguments"
 454
 455 config CMDLINE
 456         string "Initial kernel command string"
 457         depends on CMDLINE_BOOL
 458         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 459         help
 460           On some platforms, there is currently no way for the boot loader to
 461           pass arguments to the kernel. For these platforms, you can supply
 462           some command-line options at build time by entering them here.  In
 463           most cases you will need to specify the root device here.
 464
 465 config EXTRA_TARGETS
 466         string "Additional default image types"
 467         help
 468           List additional targets to be built by the bootwrapper here (separated
 469           by spaces).  This is useful for targets that depend of device tree
 470           files in the .dts directory.
 471
 472           Targets in this list will be build as part of the default build
 473           target, or when the user does a 'make zImage' or a
 474           'make zImage.initrd'.
 475
 476           If unsure, leave blank
 477
 478 if !44x || BROKEN
 479 config ARCH_WANTS_FREEZER_CONTROL
 480         def_bool y
 481         depends on ADB_PMU
 482
 483 source kernel/power/Kconfig
 484 endif
 485
 486 config SECCOMP
 487         bool "Enable seccomp to safely compute untrusted bytecode"
 488         depends on PROC_FS
 489         default y
 490         help
 491           This kernel feature is useful for number crunching applications
 492           that may need to compute untrusted bytecode during their
 493           execution. By using pipes or other transports made available to
 494           the process as file descriptors supporting the read/write
 495           syscalls, it's possible to isolate those applications in
 496           their own address space using seccomp. Once seccomp is
 497           enabled via /proc/<pid>/seccomp, it cannot be disabled
 498           and the task is only allowed to execute a few safe syscalls
 499           defined by each seccomp mode.
 500
 501           If unsure, say Y. Only embedded should say N here.
 502
 503 endmenu
 504
 505 config ISA_DMA_API
 506         bool
 507         default !PPC_ISERIES || PCI
 508
 509 menu "Bus options"
 510
 511 config ISA
 512         bool "Support for ISA-bus hardware"
 513         depends on PPC_PREP || PPC_CHRP
 514         select PPC_I8259
 515         help
 516           Find out whether you have ISA slots on your motherboard.  ISA is the
 517           name of a bus system, i.e. the way the CPU talks to the other stuff
 518           inside your box.  If you have an Apple machine, say N here; if you
 519           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 520           you have an embedded board, consult your board documentation.
 521
 522 config ZONE_DMA
 523         bool
 524         default y
 525
 526 config GENERIC_ISA_DMA
 527         bool
 528         depends on PPC64 || POWER4 || 6xx && !CPM2
 529         default y
 530
 531 config PPC_INDIRECT_PCI
 532         bool
 533         depends on PCI
 534         default y if 40x || 44x
 535         default n
 536
 537 config EISA
 538         bool
 539
 540 config SBUS
 541         bool
 542
 543 config FSL_SOC
 544         bool
 545
 546 config FSL_PCI
 547         bool
 548         select PPC_INDIRECT_PCI
 549
 550 config 4xx_SOC
 551         bool
 552
 553 config FSL_LBC
 554         bool
 555         help
 556           Freescale Localbus support
 557
 558 config FSL_GTM
 559         bool
 560         depends on PPC_83xx || QUICC_ENGINE || CPM2
 561         help
 562           Freescale General-purpose Timers support
 563
 564 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 565 config MCA
 566         bool
 567
 568 config PCI
 569         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 570                 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
 571                 || PPC_PS3 || 44x
 572         default y if !40x && !CPM2 && !8xx && !PPC_MPC512x && !PPC_83xx \
 573                 && !PPC_85xx && !PPC_86xx
 574         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 575         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 576         select ARCH_SUPPORTS_MSI
 577         help
 578           Find out whether your system includes a PCI bus. PCI is the name of
 579           a bus system, i.e. the way the CPU talks to the other stuff inside
 580           your box.  If you say Y here, the kernel will include drivers and
 581           infrastructure code to support PCI bus devices.
 582
 583 config PCI_DOMAINS
 584         def_bool PCI
 585
 586 config PCI_SYSCALL
 587         def_bool PCI
 588
 589 config PCI_QSPAN
 590         bool "QSpan PCI"
 591         depends on !4xx && !CPM2 && 8xx
 592         select PPC_I8259
 593         help
 594           Say Y here if you have a system based on a Motorola 8xx-series
 595           embedded processor with a QSPAN PCI interface, otherwise say N.
 596
 597 config PCI_8260
 598         bool
 599         depends on PCI && 8260
 600         select PPC_INDIRECT_PCI
 601         default y
 602
 603 config 8260_PCI9
 604         bool "Enable workaround for MPC826x erratum PCI 9"
 605         depends on PCI_8260 && !8272
 606         default y
 607
 608 choice
 609         prompt "IDMA channel for PCI 9 workaround"
 610         depends on 8260_PCI9
 611
 612 config 8260_PCI9_IDMA1
 613         bool "IDMA1"
 614
 615 config 8260_PCI9_IDMA2
 616         bool "IDMA2"
 617
 618 config 8260_PCI9_IDMA3
 619         bool "IDMA3"
 620
 621 config 8260_PCI9_IDMA4
 622         bool "IDMA4"
 623
 624 endchoice
 625
 626 source "drivers/pci/pcie/Kconfig"
 627
 628 source "drivers/pci/Kconfig"
 629
 630 source "drivers/pcmcia/Kconfig"
 631
 632 source "drivers/pci/hotplug/Kconfig"
 633
 634 config HAS_RAPIDIO
 635         bool
 636         default n
 637
 638 config RAPIDIO
 639         bool "RapidIO support"
 640         depends on HAS_RAPIDIO
 641         help
 642           If you say Y here, the kernel will include drivers and
 643           infrastructure code to support RapidIO interconnect devices.
 644
 645 source "drivers/rapidio/Kconfig"
 646
 647 endmenu
 648
 649 menu "Advanced setup"
 650         depends on PPC32
 651
 652 config ADVANCED_OPTIONS
 653         bool "Prompt for advanced kernel configuration options"
 654         help
 655           This option will enable prompting for a variety of advanced kernel
 656           configuration options.  These options can cause the kernel to not
 657           work if they are set incorrectly, but can be used to optimize certain
 658           aspects of kernel memory management.
 659
 660           Unless you know what you are doing, say N here.
 661
 662 comment "Default settings for advanced configuration options are used"
 663         depends on !ADVANCED_OPTIONS
 664
 665 config LOWMEM_SIZE_BOOL
 666         bool "Set maximum low memory"
 667         depends on ADVANCED_OPTIONS
 668         help
 669           This option allows you to set the maximum amount of memory which
 670           will be used as "low memory", that is, memory which the kernel can
 671           access directly, without having to set up a kernel virtual mapping.
 672           This can be useful in optimizing the layout of kernel virtual
 673           memory.
 674
 675           Say N here unless you know what you are doing.
 676
 677 config LOWMEM_SIZE
 678         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 679         default "0x30000000"
 680
 681 config RELOCATABLE
 682         bool "Build a relocatable kernel (EXPERIMENTAL)"
 683         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 684         help
 685           This builds a kernel image that is capable of running at the
 686           location the kernel is loaded at (some alignment restrictions may
 687           exist).
 688
 689           One use is for the kexec on panic case where the recovery kernel
 690           must live at a different physical address than the primary
 691           kernel.
 692
 693           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 694           it has been loaded at and the compile time physical addresses
 695           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 696           setting can still be useful to bootwrappers that need to know the
 697           load location of the kernel (eg. u-boot/mkimage).
 698
 699 config PAGE_OFFSET_BOOL
 700         bool "Set custom page offset address"
 701         depends on ADVANCED_OPTIONS
 702         help
 703           This option allows you to set the kernel virtual address at which
 704           the kernel will map low memory.  This can be useful in optimizing
 705           the virtual memory layout of the system.
 706
 707           Say N here unless you know what you are doing.
 708
 709 config PAGE_OFFSET
 710         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 711         default "0xc0000000"
 712
 713 config KERNEL_START_BOOL
 714         bool "Set custom kernel base address"
 715         depends on ADVANCED_OPTIONS
 716         help
 717           This option allows you to set the kernel virtual address at which
 718           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 719           however there are times (like kdump) that one might not want them
 720           to be the same.
 721
 722           Say N here unless you know what you are doing.
 723
 724 config KERNEL_START
 725         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 726         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 727         default "0xc2000000" if CRASH_DUMP
 728         default "0xc0000000"
 729
 730 config PHYSICAL_START_BOOL
 731         bool "Set physical address where the kernel is loaded"
 732         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 733         help
 734           This gives the physical address where the kernel is loaded.
 735
 736           Say N here unless you know what you are doing.
 737
 738 config PHYSICAL_START
 739         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 740         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 741         default "0x00000000"
 742
 743 config PHYSICAL_ALIGN
 744         hex
 745         default "0x10000000" if FSL_BOOKE
 746         help
 747           This value puts the alignment restrictions on physical address
 748           where kernel is loaded and run from. Kernel is compiled for an
 749           address which meets above alignment restriction.
 750
 751 config TASK_SIZE_BOOL
 752         bool "Set custom user task size"
 753         depends on ADVANCED_OPTIONS
 754         help
 755           This option allows you to set the amount of virtual address space
 756           allocated to user tasks.  This can be useful in optimizing the
 757           virtual memory layout of the system.
 758
 759           Say N here unless you know what you are doing.
 760
 761 config TASK_SIZE
 762         hex "Size of user task space" if TASK_SIZE_BOOL
 763         default "0x80000000" if PPC_PREP || PPC_8xx
 764         default "0xc0000000"
 765
 766 config CONSISTENT_START_BOOL
 767         bool "Set custom consistent memory pool address"
 768         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 769         help
 770           This option allows you to set the base virtual address
 771           of the consistent memory pool.  This pool of virtual
 772           memory is used to make consistent memory allocations.
 773
 774 config CONSISTENT_START
 775         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 776         default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
 777         default "0xff100000" if NOT_COHERENT_CACHE
 778
 779 config CONSISTENT_SIZE_BOOL
 780         bool "Set custom consistent memory pool size"
 781         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 782         help
 783           This option allows you to set the size of the
 784           consistent memory pool.  This pool of virtual memory
 785           is used to make consistent memory allocations.
 786
 787 config CONSISTENT_SIZE
 788         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 789         default "0x00200000" if NOT_COHERENT_CACHE
 790
 791 config PIN_TLB
 792         bool "Pinned Kernel TLBs (860 ONLY)"
 793         depends on ADVANCED_OPTIONS && 8xx
 794 endmenu
 795
 796 if PPC64
 797 config PAGE_OFFSET
 798         hex
 799         default "0xc000000000000000"
 800 config KERNEL_START
 801         hex
 802         default "0xc000000002000000" if CRASH_DUMP
 803         default "0xc000000000000000"
 804 config PHYSICAL_START
 805         hex
 806         default "0x02000000" if CRASH_DUMP
 807         default "0x00000000"
 808 endif
 809
 810 source "net/Kconfig"
 811
 812 source "drivers/Kconfig"
 813
 814 source "fs/Kconfig"
 815
 816 # XXX source "arch/ppc/8xx_io/Kconfig"
 817
 818 # XXX source "arch/ppc/8260_io/Kconfig"
 819
 820 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 821
 822 source "lib/Kconfig"
 823
 824 source "arch/powerpc/Kconfig.debug"
 825
 826 source "security/Kconfig"
 827
 828 config KEYS_COMPAT
 829         bool
 830         depends on COMPAT && KEYS
 831         default y
 832
 833 source "crypto/Kconfig"
 834
 835 config PPC_CLOCK
 836         bool
 837         default n
 838
 839 config PPC_LIB_RHEAP
 840         bool
 841
 842 source "arch/powerpc/kvm/Kconfig"