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_DYNAMIC_FTRACE
 112         select HAVE_FTRACE
 113         select HAVE_IDE
 114         select HAVE_KPROBES
 115         select HAVE_KRETPROBES
 116         select HAVE_LMB
 117         select HAVE_DMA_ATTRS if PPC64
 118         select USE_GENERIC_SMP_HELPERS if SMP
 119         select HAVE_OPROFILE
 120
 121 config EARLY_PRINTK
 122         bool
 123         default y
 124
 125 config COMPAT
 126         bool
 127         default y if PPC64
 128         select COMPAT_BINFMT_ELF
 129
 130 config SYSVIPC_COMPAT
 131         bool
 132         depends on COMPAT && SYSVIPC
 133         default y
 134
 135 # All PPC32s use generic nvram driver through ppc_md
 136 config GENERIC_NVRAM
 137         bool
 138         default y if PPC32
 139
 140 config SCHED_NO_NO_OMIT_FRAME_POINTER
 141         bool
 142         default y
 143
 144 config ARCH_MAY_HAVE_PC_FDC
 145         bool
 146         default !PPC_PSERIES || PCI
 147
 148 config PPC_OF
 149         def_bool y
 150
 151 config OF
 152         def_bool y
 153
 154 config PPC_UDBG_16550
 155         bool
 156         default n
 157
 158 config GENERIC_TBSYNC
 159         bool
 160         default y if PPC32 && SMP
 161         default n
 162
 163 config AUDIT_ARCH
 164         bool
 165         default y
 166
 167 config GENERIC_BUG
 168         bool
 169         default y
 170         depends on BUG
 171
 172 config SYS_SUPPORTS_APM_EMULATION
 173         default y if PMAC_APM_EMU
 174         bool
 175
 176 config DEFAULT_UIMAGE
 177         bool
 178         help
 179           Used to allow a board to specify it wants a uImage built by default
 180         default n
 181
 182 config REDBOOT
 183         bool
 184
 185 config HIBERNATE_32
 186         bool
 187         depends on (PPC_PMAC && !SMP) || BROKEN
 188         default y
 189
 190 config HIBERNATE_64
 191         bool
 192         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 193         default y
 194
 195 config ARCH_HIBERNATION_POSSIBLE
 196         bool
 197         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 198         default y
 199
 200 config ARCH_SUSPEND_POSSIBLE
 201         def_bool y
 202         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
 203
 204 config PPC_DCR_NATIVE
 205         bool
 206         default n
 207
 208 config PPC_DCR_MMIO
 209         bool
 210         default n
 211
 212 config PPC_DCR
 213         bool
 214         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 215         default y
 216
 217 config PPC_OF_PLATFORM_PCI
 218         bool
 219         depends on PCI
 220         depends on PPC64 # not supported on 32 bits yet
 221         default n
 222
 223 source "init/Kconfig"
 224
 225 source "arch/powerpc/sysdev/Kconfig"
 226 source "arch/powerpc/platforms/Kconfig"
 227
 228 menu "Kernel options"
 229
 230 config HIGHMEM
 231         bool "High memory support"
 232         depends on PPC32
 233
 234 source kernel/time/Kconfig
 235 source kernel/Kconfig.hz
 236 source kernel/Kconfig.preempt
 237 source "fs/Kconfig.binfmt"
 238
 239 config HUGETLB_PAGE_SIZE_VARIABLE
 240         bool
 241         depends on HUGETLB_PAGE
 242         default y
 243
 244 config MATH_EMULATION
 245         bool "Math emulation"
 246         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 247         ---help---
 248           Some PowerPC chips designed for embedded applications do not have
 249           a floating-point unit and therefore do not implement the
 250           floating-point instructions in the PowerPC instruction set.  If you
 251           say Y here, the kernel will include code to emulate a floating-point
 252           unit, which will allow programs that use floating-point
 253           instructions to run.
 254
 255 config 8XX_MINIMAL_FPEMU
 256         bool "Minimal math emulation for 8xx"
 257         depends on 8xx && !MATH_EMULATION
 258         help
 259           Older arch/ppc kernels still emulated a few floating point
 260           instructions such as load and store, even when full math
 261           emulation is disabled.  Say "Y" here if you want to preserve
 262           this behavior.
 263
 264           It is recommended that you build a soft-float userspace instead.
 265
 266 config IOMMU_VMERGE
 267         bool "Enable IOMMU virtual merging"
 268         depends on PPC64
 269         default y
 270         help
 271           Cause IO segments sent to a device for DMA to be merged virtually
 272           by the IOMMU when they happen to have been allocated contiguously.
 273           This doesn't add pressure to the IOMMU allocator. However, some
 274           drivers don't support getting large merged segments coming back
 275           from *_map_sg().
 276
 277           Most drivers don't have this problem; it is safe to say Y here.
 278
 279 config IOMMU_HELPER
 280         def_bool PPC64
 281
 282 config HOTPLUG_CPU
 283         bool "Support for enabling/disabling CPUs"
 284         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 285         ---help---
 286           Say Y here to be able to disable and re-enable individual
 287           CPUs at runtime on SMP machines.
 288
 289           Say N if you are unsure.
 290
 291 config ARCH_ENABLE_MEMORY_HOTPLUG
 292         def_bool y
 293
 294 config ARCH_HAS_WALK_MEMORY
 295         def_bool y
 296
 297 config ARCH_ENABLE_MEMORY_HOTREMOVE
 298         def_bool y
 299
 300 config KEXEC
 301         bool "kexec system call (EXPERIMENTAL)"
 302         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 303         help
 304           kexec is a system call that implements the ability to shutdown your
 305           current kernel, and to start another kernel.  It is like a reboot
 306           but it is independent of the system firmware.   And like a reboot
 307           you can start any kernel with it, not just Linux.
 308
 309           The name comes from the similarity to the exec system call.
 310
 311           It is an ongoing process to be certain the hardware in a machine
 312           is properly shutdown, so do not be surprised if this code does not
 313           initially work for you.  It may help to enable device hotplugging
 314           support.  As of this writing the exact hardware interface is
 315           strongly in flux, so no good recommendation can be made.
 316
 317 config CRASH_DUMP
 318         bool "Build a kdump crash kernel"
 319         depends on PPC_MULTIPLATFORM && PPC64
 320         help
 321           Build a kernel suitable for use as a kdump capture kernel.
 322           The kernel will be linked at a different address than normal, and
 323           so can only be used for Kdump.
 324
 325           Don't change this unless you know what you are doing.
 326
 327 config PHYP_DUMP
 328         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 329         depends on PPC_PSERIES && EXPERIMENTAL
 330         help
 331           Hypervisor-assisted dump is meant to be a kdump replacement
 332           offering robustness and speed not possible without system
 333           hypervisor assistence.
 334
 335           If unsure, say "N"
 336
 337 config PPCBUG_NVRAM
 338         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 339         default y if PPC_PREP
 340
 341 config IRQ_ALL_CPUS
 342         bool "Distribute interrupts on all CPUs by default"
 343         depends on SMP && !MV64360
 344         help
 345           This option gives the kernel permission to distribute IRQs across
 346           multiple CPUs.  Saying N here will route all IRQs to the first
 347           CPU.  Generally saying Y is safe, although some problems have been
 348           reported with SMP Power Macintoshes with this option enabled.
 349
 350 config NUMA
 351         bool "NUMA support"
 352         depends on PPC64
 353         default y if SMP && PPC_PSERIES
 354
 355 config NODES_SHIFT
 356         int
 357         default "4"
 358         depends on NEED_MULTIPLE_NODES
 359
 360 config ARCH_SELECT_MEMORY_MODEL
 361         def_bool y
 362         depends on PPC64
 363
 364 config ARCH_FLATMEM_ENABLE
 365         def_bool y
 366         depends on (PPC64 && !NUMA) || PPC32
 367
 368 config ARCH_SPARSEMEM_ENABLE
 369         def_bool y
 370         depends on PPC64
 371         select SPARSEMEM_VMEMMAP_ENABLE
 372
 373 config ARCH_SPARSEMEM_DEFAULT
 374         def_bool y
 375         depends on (SMP && PPC_PSERIES) || PPC_PS3
 376
 377 config ARCH_POPULATES_NODE_MAP
 378         def_bool y
 379
 380 source "mm/Kconfig"
 381
 382 config ARCH_MEMORY_PROBE
 383         def_bool y
 384         depends on MEMORY_HOTPLUG
 385
 386 # Some NUMA nodes have memory ranges that span
 387 # other nodes.  Even though a pfn is valid and
 388 # between a node's start and end pfns, it may not
 389 # reside on that node.  See memmap_init_zone()
 390 # for details.
 391 config NODES_SPAN_OTHER_NODES
 392         def_bool y
 393         depends on NEED_MULTIPLE_NODES
 394
 395 config PPC_HAS_HASH_64K
 396         bool
 397         depends on PPC64
 398         default n
 399
 400 config PPC_64K_PAGES
 401         bool "64k page size"
 402         depends on PPC64
 403         select PPC_HAS_HASH_64K
 404         help
 405           This option changes the kernel logical page size to 64k. On machines
 406           without processor support for 64k pages, the kernel will simulate
 407           them by loading each individual 4k page on demand transparently,
 408           while on hardware with such support, it will be used to map
 409           normal application pages.
 410
 411 config FORCE_MAX_ZONEORDER
 412         int "Maximum zone order"
 413         default "9" if PPC_64K_PAGES
 414         default "13" if PPC64 && !PPC_64K_PAGES
 415         default "11"
 416         help
 417           The kernel memory allocator divides physically contiguous memory
 418           blocks into "zones", where each zone is a power of two number of
 419           pages.  This option selects the largest power of two that the kernel
 420           keeps in the memory allocator.  If you need to allocate very large
 421           blocks of physically contiguous memory, then you may need to
 422           increase this value.
 423
 424           This config option is actually maximum order plus one. For example,
 425           a value of 11 means that the largest free memory block is 2^10 pages.
 426
 427           The page size is not necessarily 4KB.  For example, on 64-bit
 428           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 429           this in mind when choosing a value for this option.
 430
 431 config PPC_SUBPAGE_PROT
 432         bool "Support setting protections for 4k subpages"
 433         depends on PPC_64K_PAGES
 434         help
 435           This option adds support for a system call to allow user programs
 436           to set access permissions (read/write, readonly, or no access)
 437           on the 4k subpages of each 64k page.
 438
 439 config SCHED_SMT
 440         bool "SMT (Hyperthreading) scheduler support"
 441         depends on PPC64 && SMP
 442         help
 443           SMT scheduler support improves the CPU scheduler's decision making
 444           when dealing with POWER5 cpus at a cost of slightly increased
 445           overhead in some places. If unsure say N here.
 446
 447 config PROC_DEVICETREE
 448         bool "Support for device tree in /proc"
 449         depends on PROC_FS
 450         help
 451           This option adds a device-tree directory under /proc which contains
 452           an image of the device tree that the kernel copies from Open
 453           Firmware or other boot firmware. If unsure, say Y here.
 454
 455 config CMDLINE_BOOL
 456         bool "Default bootloader kernel arguments"
 457
 458 config CMDLINE
 459         string "Initial kernel command string"
 460         depends on CMDLINE_BOOL
 461         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 462         help
 463           On some platforms, there is currently no way for the boot loader to
 464           pass arguments to the kernel. For these platforms, you can supply
 465           some command-line options at build time by entering them here.  In
 466           most cases you will need to specify the root device here.
 467
 468 config EXTRA_TARGETS
 469         string "Additional default image types"
 470         help
 471           List additional targets to be built by the bootwrapper here (separated
 472           by spaces).  This is useful for targets that depend of device tree
 473           files in the .dts directory.
 474
 475           Targets in this list will be build as part of the default build
 476           target, or when the user does a 'make zImage' or a
 477           'make zImage.initrd'.
 478
 479           If unsure, leave blank
 480
 481 if !44x || BROKEN
 482 config ARCH_WANTS_FREEZER_CONTROL
 483         def_bool y
 484         depends on ADB_PMU
 485
 486 source kernel/power/Kconfig
 487 endif
 488
 489 config SECCOMP
 490         bool "Enable seccomp to safely compute untrusted bytecode"
 491         depends on PROC_FS
 492         default y
 493         help
 494           This kernel feature is useful for number crunching applications
 495           that may need to compute untrusted bytecode during their
 496           execution. By using pipes or other transports made available to
 497           the process as file descriptors supporting the read/write
 498           syscalls, it's possible to isolate those applications in
 499           their own address space using seccomp. Once seccomp is
 500           enabled via /proc/<pid>/seccomp, it cannot be disabled
 501           and the task is only allowed to execute a few safe syscalls
 502           defined by each seccomp mode.
 503
 504           If unsure, say Y. Only embedded should say N here.
 505
 506 endmenu
 507
 508 config ISA_DMA_API
 509         bool
 510         default !PPC_ISERIES || PCI
 511
 512 menu "Bus options"
 513
 514 config ISA
 515         bool "Support for ISA-bus hardware"
 516         depends on PPC_PREP || PPC_CHRP
 517         select PPC_I8259
 518         help
 519           Find out whether you have ISA slots on your motherboard.  ISA is the
 520           name of a bus system, i.e. the way the CPU talks to the other stuff
 521           inside your box.  If you have an Apple machine, say N here; if you
 522           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 523           you have an embedded board, consult your board documentation.
 524
 525 config ZONE_DMA
 526         bool
 527         default y
 528
 529 config GENERIC_ISA_DMA
 530         bool
 531         depends on PPC64 || POWER4 || 6xx && !CPM2
 532         default y
 533
 534 config PPC_INDIRECT_PCI
 535         bool
 536         depends on PCI
 537         default y if 40x || 44x
 538         default n
 539
 540 config EISA
 541         bool
 542
 543 config SBUS
 544         bool
 545
 546 config FSL_SOC
 547         bool
 548
 549 config FSL_PCI
 550         bool
 551         select PPC_INDIRECT_PCI
 552
 553 config 4xx_SOC
 554         bool
 555
 556 config FSL_LBC
 557         bool
 558         help
 559           Freescale Localbus support
 560
 561 config FSL_GTM
 562         bool
 563         depends on PPC_83xx || QUICC_ENGINE || CPM2
 564         help
 565           Freescale General-purpose Timers support
 566
 567 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 568 config MCA
 569         bool
 570
 571 config PCI
 572         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 573                 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
 574                 || PPC_PS3 || 44x
 575         default y if !40x && !CPM2 && !8xx && !PPC_MPC512x && !PPC_83xx \
 576                 && !PPC_85xx && !PPC_86xx
 577         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 578         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 579         select ARCH_SUPPORTS_MSI
 580         help
 581           Find out whether your system includes a PCI bus. PCI is the name of
 582           a bus system, i.e. the way the CPU talks to the other stuff inside
 583           your box.  If you say Y here, the kernel will include drivers and
 584           infrastructure code to support PCI bus devices.
 585
 586 config PCI_DOMAINS
 587         def_bool PCI
 588
 589 config PCI_SYSCALL
 590         def_bool PCI
 591
 592 config PCI_QSPAN
 593         bool "QSpan PCI"
 594         depends on !4xx && !CPM2 && 8xx
 595         select PPC_I8259
 596         help
 597           Say Y here if you have a system based on a Motorola 8xx-series
 598           embedded processor with a QSPAN PCI interface, otherwise say N.
 599
 600 config PCI_8260
 601         bool
 602         depends on PCI && 8260
 603         select PPC_INDIRECT_PCI
 604         default y
 605
 606 config 8260_PCI9
 607         bool "Enable workaround for MPC826x erratum PCI 9"
 608         depends on PCI_8260 && !8272
 609         default y
 610
 611 choice
 612         prompt "IDMA channel for PCI 9 workaround"
 613         depends on 8260_PCI9
 614
 615 config 8260_PCI9_IDMA1
 616         bool "IDMA1"
 617
 618 config 8260_PCI9_IDMA2
 619         bool "IDMA2"
 620
 621 config 8260_PCI9_IDMA3
 622         bool "IDMA3"
 623
 624 config 8260_PCI9_IDMA4
 625         bool "IDMA4"
 626
 627 endchoice
 628
 629 source "drivers/pci/pcie/Kconfig"
 630
 631 source "drivers/pci/Kconfig"
 632
 633 source "drivers/pcmcia/Kconfig"
 634
 635 source "drivers/pci/hotplug/Kconfig"
 636
 637 config HAS_RAPIDIO
 638         bool
 639         default n
 640
 641 config RAPIDIO
 642         bool "RapidIO support"
 643         depends on HAS_RAPIDIO
 644         help
 645           If you say Y here, the kernel will include drivers and
 646           infrastructure code to support RapidIO interconnect devices.
 647
 648 source "drivers/rapidio/Kconfig"
 649
 650 endmenu
 651
 652 menu "Advanced setup"
 653         depends on PPC32
 654
 655 config ADVANCED_OPTIONS
 656         bool "Prompt for advanced kernel configuration options"
 657         help
 658           This option will enable prompting for a variety of advanced kernel
 659           configuration options.  These options can cause the kernel to not
 660           work if they are set incorrectly, but can be used to optimize certain
 661           aspects of kernel memory management.
 662
 663           Unless you know what you are doing, say N here.
 664
 665 comment "Default settings for advanced configuration options are used"
 666         depends on !ADVANCED_OPTIONS
 667
 668 config LOWMEM_SIZE_BOOL
 669         bool "Set maximum low memory"
 670         depends on ADVANCED_OPTIONS
 671         help
 672           This option allows you to set the maximum amount of memory which
 673           will be used as "low memory", that is, memory which the kernel can
 674           access directly, without having to set up a kernel virtual mapping.
 675           This can be useful in optimizing the layout of kernel virtual
 676           memory.
 677
 678           Say N here unless you know what you are doing.
 679
 680 config LOWMEM_SIZE
 681         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 682         default "0x30000000"
 683
 684 config RELOCATABLE
 685         bool "Build a relocatable kernel (EXPERIMENTAL)"
 686         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 687         help
 688           This builds a kernel image that is capable of running at the
 689           location the kernel is loaded at (some alignment restrictions may
 690           exist).
 691
 692           One use is for the kexec on panic case where the recovery kernel
 693           must live at a different physical address than the primary
 694           kernel.
 695
 696           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 697           it has been loaded at and the compile time physical addresses
 698           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 699           setting can still be useful to bootwrappers that need to know the
 700           load location of the kernel (eg. u-boot/mkimage).
 701
 702 config PAGE_OFFSET_BOOL
 703         bool "Set custom page offset address"
 704         depends on ADVANCED_OPTIONS
 705         help
 706           This option allows you to set the kernel virtual address at which
 707           the kernel will map low memory.  This can be useful in optimizing
 708           the virtual memory layout of the system.
 709
 710           Say N here unless you know what you are doing.
 711
 712 config PAGE_OFFSET
 713         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 714         default "0xc0000000"
 715
 716 config KERNEL_START_BOOL
 717         bool "Set custom kernel base address"
 718         depends on ADVANCED_OPTIONS
 719         help
 720           This option allows you to set the kernel virtual address at which
 721           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 722           however there are times (like kdump) that one might not want them
 723           to be the same.
 724
 725           Say N here unless you know what you are doing.
 726
 727 config KERNEL_START
 728         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 729         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 730         default "0xc2000000" if CRASH_DUMP
 731         default "0xc0000000"
 732
 733 config PHYSICAL_START_BOOL
 734         bool "Set physical address where the kernel is loaded"
 735         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 736         help
 737           This gives the physical address where the kernel is loaded.
 738
 739           Say N here unless you know what you are doing.
 740
 741 config PHYSICAL_START
 742         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 743         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 744         default "0x00000000"
 745
 746 config PHYSICAL_ALIGN
 747         hex
 748         default "0x10000000" if FSL_BOOKE
 749         help
 750           This value puts the alignment restrictions on physical address
 751           where kernel is loaded and run from. Kernel is compiled for an
 752           address which meets above alignment restriction.
 753
 754 config TASK_SIZE_BOOL
 755         bool "Set custom user task size"
 756         depends on ADVANCED_OPTIONS
 757         help
 758           This option allows you to set the amount of virtual address space
 759           allocated to user tasks.  This can be useful in optimizing the
 760           virtual memory layout of the system.
 761
 762           Say N here unless you know what you are doing.
 763
 764 config TASK_SIZE
 765         hex "Size of user task space" if TASK_SIZE_BOOL
 766         default "0x80000000" if PPC_PREP || PPC_8xx
 767         default "0xc0000000"
 768
 769 config CONSISTENT_START_BOOL
 770         bool "Set custom consistent memory pool address"
 771         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 772         help
 773           This option allows you to set the base virtual address
 774           of the consistent memory pool.  This pool of virtual
 775           memory is used to make consistent memory allocations.
 776
 777 config CONSISTENT_START
 778         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 779         default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
 780         default "0xff100000" if NOT_COHERENT_CACHE
 781
 782 config CONSISTENT_SIZE_BOOL
 783         bool "Set custom consistent memory pool size"
 784         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 785         help
 786           This option allows you to set the size of the
 787           consistent memory pool.  This pool of virtual memory
 788           is used to make consistent memory allocations.
 789
 790 config CONSISTENT_SIZE
 791         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 792         default "0x00200000" if NOT_COHERENT_CACHE
 793
 794 config PIN_TLB
 795         bool "Pinned Kernel TLBs (860 ONLY)"
 796         depends on ADVANCED_OPTIONS && 8xx
 797 endmenu
 798
 799 if PPC64
 800 config PAGE_OFFSET
 801         hex
 802         default "0xc000000000000000"
 803 config KERNEL_START
 804         hex
 805         default "0xc000000002000000" if CRASH_DUMP
 806         default "0xc000000000000000"
 807 config PHYSICAL_START
 808         hex
 809         default "0x02000000" if CRASH_DUMP
 810         default "0x00000000"
 811 endif
 812
 813 source "net/Kconfig"
 814
 815 source "drivers/Kconfig"
 816
 817 source "fs/Kconfig"
 818
 819 # XXX source "arch/ppc/8xx_io/Kconfig"
 820
 821 # XXX source "arch/ppc/8260_io/Kconfig"
 822
 823 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 824
 825 source "lib/Kconfig"
 826
 827 source "arch/powerpc/Kconfig.debug"
 828
 829 source "security/Kconfig"
 830
 831 config KEYS_COMPAT
 832         bool
 833         depends on COMPAT && KEYS
 834         default y
 835
 836 source "crypto/Kconfig"
 837
 838 config PPC_CLOCK
 839         bool
 840         default n
 841
 842 config PPC_LIB_RHEAP
 843         bool
 844
 845 source "arch/powerpc/kvm/Kconfig"