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 config PPC64
   8         bool "64-bit kernel"
   9         default n
  10         help
  11           This option selects whether a 32-bit or a 64-bit kernel
  12           will be built.
  13
  14 config PPC_PM_NEEDS_RTC_LIB
  15         bool
  16         select RTC_LIB
  17         default y if PM
  18
  19 config PPC32
  20         bool
  21         default y if !PPC64
  22
  23 config 64BIT
  24         bool
  25         default y if PPC64
  26
  27 config PPC_MERGE
  28         def_bool y
  29
  30 config MMU
  31         bool
  32         default y
  33
  34 config GENERIC_HARDIRQS
  35         bool
  36         default y
  37
  38 config IRQ_PER_CPU
  39         bool
  40         default y
  41
  42 config RWSEM_GENERIC_SPINLOCK
  43         bool
  44
  45 config RWSEM_XCHGADD_ALGORITHM
  46         bool
  47         default y
  48
  49 config ARCH_HAS_ILOG2_U32
  50         bool
  51         default y
  52
  53 config ARCH_HAS_ILOG2_U64
  54         bool
  55         default y if 64BIT
  56
  57 config GENERIC_HWEIGHT
  58         bool
  59         default y
  60
  61 config GENERIC_CALIBRATE_DELAY
  62         bool
  63         default y
  64
  65 config GENERIC_FIND_NEXT_BIT
  66         bool
  67         default y
  68
  69 config PPC
  70         bool
  71         default y
  72
  73 config EARLY_PRINTK
  74         bool
  75         default y
  76
  77 config COMPAT
  78         bool
  79         default y if PPC64
  80
  81 config SYSVIPC_COMPAT
  82         bool
  83         depends on COMPAT && SYSVIPC
  84         default y
  85
  86 # All PPC32s use generic nvram driver through ppc_md
  87 config GENERIC_NVRAM
  88         bool
  89         default y if PPC32
  90
  91 config SCHED_NO_NO_OMIT_FRAME_POINTER
  92         bool
  93         default y
  94
  95 config ARCH_MAY_HAVE_PC_FDC
  96         bool
  97         default !PPC_PSERIES || PCI
  98
  99 config PPC_OF
 100         def_bool y
 101
 102 config PPC_UDBG_16550
 103         bool
 104         default n
 105
 106 config GENERIC_TBSYNC
 107         bool
 108         default y if PPC32 && SMP
 109         default n
 110
 111 config AUDIT_ARCH
 112         bool
 113         default y
 114
 115 config GENERIC_BUG
 116         bool
 117         default y
 118         depends on BUG
 119
 120 config SYS_SUPPORTS_APM_EMULATION
 121         bool
 122
 123 config DEFAULT_UIMAGE
 124         bool
 125         help
 126           Used to allow a board to specify it wants a uImage built by default
 127         default n
 128
 129 config PPC64_SWSUSP
 130         bool
 131         depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
 132         default y
 133
 134 menu "Processor support"
 135 choice
 136         prompt "Processor Type"
 137         depends on PPC32
 138         default 6xx
 139
 140 config CLASSIC32
 141         bool "52xx/6xx/7xx/74xx"
 142         select PPC_FPU
 143         select 6xx
 144         help
 145           There are four families of PowerPC chips supported.  The more common
 146           types (601, 603, 604, 740, 750, 7400), the Motorola embedded
 147           versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
 148           embedded versions (403 and 405) and the high end 64 bit Power
 149           processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
 150
 151           This option is the catch-all for 6xx types, including some of the
 152           embedded versions.  Unless there is see an option for the specific
 153           chip family you are using, you want this option.
 154
 155           You do not want this if you are building a kernel for a 64 bit
 156           IBM RS/6000 or an Apple G5, choose 6xx.
 157
 158           If unsure, select this option
 159
 160           Note that the kernel runs in 32-bit mode even on 64-bit chips.
 161
 162 config PPC_82xx
 163         bool "Freescale 82xx"
 164         select 6xx
 165         select PPC_FPU
 166
 167 config PPC_83xx
 168         bool "Freescale 83xx"
 169         select 6xx
 170         select FSL_SOC
 171         select 83xx
 172         select PPC_FPU
 173         select WANT_DEVICE_TREE
 174
 175 config PPC_85xx
 176         bool "Freescale 85xx"
 177         select E500
 178         select FSL_SOC
 179         select 85xx
 180         select WANT_DEVICE_TREE
 181
 182 config PPC_86xx
 183         bool "Freescale 86xx"
 184         select 6xx
 185         select FSL_SOC
 186         select FSL_PCIE
 187         select PPC_FPU
 188         select ALTIVEC
 189         help
 190           The Freescale E600 SoCs have 74xx cores.
 191
 192 config PPC_8xx
 193         bool "Freescale 8xx"
 194         select FSL_SOC
 195         select 8xx
 196
 197 config 40x
 198         bool "AMCC 40x"
 199         select PPC_DCR_NATIVE
 200
 201 config 44x
 202         bool "AMCC 44x"
 203         select PPC_DCR_NATIVE
 204         select WANT_DEVICE_TREE
 205
 206 config E200
 207         bool "Freescale e200"
 208
 209 endchoice
 210
 211 config POWER4_ONLY
 212         bool "Optimize for POWER4"
 213         depends on PPC64
 214         default n
 215         ---help---
 216           Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
 217           The resulting binary will not work on POWER3 or RS64 processors
 218           when compiled with binutils 2.15 or later.
 219
 220 config POWER3
 221         bool
 222         depends on PPC64
 223         default y if !POWER4_ONLY
 224
 225 config POWER4
 226         depends on PPC64
 227         def_bool y
 228
 229 config 6xx
 230         bool
 231
 232 # this is temp to handle compat with arch=ppc
 233 config 8xx
 234         bool
 235
 236 # this is temp to handle compat with arch=ppc
 237 config 83xx
 238         bool
 239
 240 # this is temp to handle compat with arch=ppc
 241 config 85xx
 242         bool
 243
 244 config E500
 245         bool
 246
 247 config PPC_FPU
 248         bool
 249         default y if PPC64
 250
 251 config PPC_DCR_NATIVE
 252         bool
 253         default n
 254
 255 config PPC_DCR_MMIO
 256         bool
 257         default n
 258
 259 config PPC_DCR
 260         bool
 261         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 262         default y
 263
 264 config PPC_OF_PLATFORM_PCI
 265         bool
 266         depends on PPC64 # not supported on 32 bits yet
 267         default n
 268
 269 config 4xx
 270         bool
 271         depends on 40x || 44x
 272         default y
 273
 274 config BOOKE
 275         bool
 276         depends on E200 || E500 || 44x
 277         default y
 278
 279 config FSL_BOOKE
 280         bool
 281         depends on E200 || E500
 282         default y
 283
 284 config PTE_64BIT
 285         bool
 286         depends on 44x || E500
 287         default y if 44x
 288         default y if E500 && PHYS_64BIT
 289
 290 config PHYS_64BIT
 291         bool 'Large physical address support' if E500
 292         depends on 44x || E500
 293         select RESOURCES_64BIT
 294         default y if 44x
 295         ---help---
 296           This option enables kernel support for larger than 32-bit physical
 297           addresses.  This features is not be available on all e500 cores.
 298
 299           If in doubt, say N here.
 300
 301 config ALTIVEC
 302         bool "AltiVec Support"
 303         depends on CLASSIC32 || POWER4
 304         ---help---
 305           This option enables kernel support for the Altivec extensions to the
 306           PowerPC processor. The kernel currently supports saving and restoring
 307           altivec registers, and turning on the 'altivec enable' bit so user
 308           processes can execute altivec instructions.
 309
 310           This option is only usefully if you have a processor that supports
 311           altivec (G4, otherwise known as 74xx series), but does not have
 312           any affect on a non-altivec cpu (it does, however add code to the
 313           kernel).
 314
 315           If in doubt, say Y here.
 316
 317 config SPE
 318         bool "SPE Support"
 319         depends on E200 || E500
 320         default y
 321         ---help---
 322           This option enables kernel support for the Signal Processing
 323           Extensions (SPE) to the PowerPC processor. The kernel currently
 324           supports saving and restoring SPE registers, and turning on the
 325           'spe enable' bit so user processes can execute SPE instructions.
 326
 327           This option is only useful if you have a processor that supports
 328           SPE (e500, otherwise known as 85xx series), but does not have any
 329           effect on a non-spe cpu (it does, however add code to the kernel).
 330
 331           If in doubt, say Y here.
 332
 333 config PPC_STD_MMU
 334         bool
 335         depends on 6xx || POWER3 || POWER4 || PPC64
 336         default y
 337
 338 config PPC_STD_MMU_32
 339         def_bool y
 340         depends on PPC_STD_MMU && PPC32
 341
 342 config PPC_MM_SLICES
 343         bool
 344         default y if HUGETLB_PAGE
 345         default n
 346
 347 config VIRT_CPU_ACCOUNTING
 348         bool "Deterministic task and CPU time accounting"
 349         depends on PPC64
 350         default y
 351         help
 352           Select this option to enable more accurate task and CPU time
 353           accounting.  This is done by reading a CPU counter on each
 354           kernel entry and exit and on transitions within the kernel
 355           between system, softirq and hardirq state, so there is a
 356           small performance impact.  This also enables accounting of
 357           stolen time on logically-partitioned systems running on
 358           IBM POWER5-based machines.
 359
 360           If in doubt, say Y here.
 361
 362 config SMP
 363         depends on PPC_STD_MMU
 364         bool "Symmetric multi-processing support"
 365         ---help---
 366           This enables support for systems with more than one CPU. If you have
 367           a system with only one CPU, say N. If you have a system with more
 368           than one CPU, say Y.  Note that the kernel does not currently
 369           support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
 370           since they have inadequate hardware support for multiprocessor
 371           operation.
 372
 373           If you say N here, the kernel will run on single and multiprocessor
 374           machines, but will use only one CPU of a multiprocessor machine. If
 375           you say Y here, the kernel will run on single-processor machines.
 376           On a single-processor machine, the kernel will run faster if you say
 377           N here.
 378
 379           If you don't know what to do here, say N.
 380
 381 config NR_CPUS
 382         int "Maximum number of CPUs (2-128)"
 383         range 2 128
 384         depends on SMP
 385         default "32" if PPC64
 386         default "4"
 387
 388 config NOT_COHERENT_CACHE
 389         bool
 390         depends on 4xx || 8xx || E200
 391         default y
 392
 393 config CONFIG_CHECK_CACHE_COHERENCY
 394         bool
 395 endmenu
 396
 397 source "init/Kconfig"
 398
 399 source "arch/powerpc/platforms/Kconfig"
 400
 401 menu "Kernel options"
 402
 403 config HIGHMEM
 404         bool "High memory support"
 405         depends on PPC32
 406
 407 source kernel/Kconfig.hz
 408 source kernel/Kconfig.preempt
 409 source "fs/Kconfig.binfmt"
 410
 411 # We optimistically allocate largepages from the VM, so make the limit
 412 # large enough (16MB). This badly named config option is actually
 413 # max order + 1
 414 config FORCE_MAX_ZONEORDER
 415         int
 416         depends on PPC64
 417         default "9" if PPC_64K_PAGES
 418         default "13"
 419
 420 config MATH_EMULATION
 421         bool "Math emulation"
 422         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 423         ---help---
 424           Some PowerPC chips designed for embedded applications do not have
 425           a floating-point unit and therefore do not implement the
 426           floating-point instructions in the PowerPC instruction set.  If you
 427           say Y here, the kernel will include code to emulate a floating-point
 428           unit, which will allow programs that use floating-point
 429           instructions to run.
 430
 431 config IOMMU_VMERGE
 432         bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
 433         depends on EXPERIMENTAL && PPC64
 434         default n
 435         help
 436           Cause IO segments sent to a device for DMA to be merged virtually
 437           by the IOMMU when they happen to have been allocated contiguously.
 438           This doesn't add pressure to the IOMMU allocator. However, some
 439           drivers don't support getting large merged segments coming back
 440           from *_map_sg(). Say Y if you know the drivers you are using are
 441           properly handling this case.
 442
 443 config HOTPLUG_CPU
 444         bool "Support for enabling/disabling CPUs"
 445         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 446         ---help---
 447           Say Y here to be able to disable and re-enable individual
 448           CPUs at runtime on SMP machines.
 449
 450           Say N if you are unsure.
 451
 452 config ARCH_ENABLE_MEMORY_HOTPLUG
 453         def_bool y
 454
 455 config KEXEC
 456         bool "kexec system call (EXPERIMENTAL)"
 457         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 458         help
 459           kexec is a system call that implements the ability to shutdown your
 460           current kernel, and to start another kernel.  It is like a reboot
 461           but it is independent of the system firmware.   And like a reboot
 462           you can start any kernel with it, not just Linux.
 463
 464           The name comes from the similarity to the exec system call.
 465
 466           It is an ongoing process to be certain the hardware in a machine
 467           is properly shutdown, so do not be surprised if this code does not
 468           initially work for you.  It may help to enable device hotplugging
 469           support.  As of this writing the exact hardware interface is
 470           strongly in flux, so no good recommendation can be made.
 471
 472 config CRASH_DUMP
 473         bool "Build a kdump crash kernel (EXPERIMENTAL)"
 474         depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
 475         help
 476           Build a kernel suitable for use as a kdump capture kernel.
 477           The kernel will be linked at a different address than normal, and
 478           so can only be used for Kdump.
 479
 480           Don't change this unless you know what you are doing.
 481
 482 config PPCBUG_NVRAM
 483         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 484         default y if PPC_PREP
 485
 486 config IRQ_ALL_CPUS
 487         bool "Distribute interrupts on all CPUs by default"
 488         depends on SMP && !MV64360
 489         help
 490           This option gives the kernel permission to distribute IRQs across
 491           multiple CPUs.  Saying N here will route all IRQs to the first
 492           CPU.  Generally saying Y is safe, although some problems have been
 493           reported with SMP Power Macintoshes with this option enabled.
 494
 495 config NUMA
 496         bool "NUMA support"
 497         depends on PPC64
 498         default y if SMP && PPC_PSERIES
 499
 500 config NODES_SHIFT
 501         int
 502         default "4"
 503         depends on NEED_MULTIPLE_NODES
 504
 505 config ARCH_SELECT_MEMORY_MODEL
 506         def_bool y
 507         depends on PPC64
 508
 509 config ARCH_FLATMEM_ENABLE
 510         def_bool y
 511         depends on (PPC64 && !NUMA) || PPC32
 512
 513 config ARCH_SPARSEMEM_ENABLE
 514         def_bool y
 515         depends on PPC64
 516
 517 config ARCH_SPARSEMEM_DEFAULT
 518         def_bool y
 519         depends on (SMP && PPC_PSERIES) || PPC_PS3
 520
 521 config ARCH_POPULATES_NODE_MAP
 522         def_bool y
 523
 524 source "mm/Kconfig"
 525
 526 config ARCH_MEMORY_PROBE
 527         def_bool y
 528         depends on MEMORY_HOTPLUG
 529
 530 # Some NUMA nodes have memory ranges that span
 531 # other nodes.  Even though a pfn is valid and
 532 # between a node's start and end pfns, it may not
 533 # reside on that node.  See memmap_init_zone()
 534 # for details.
 535 config NODES_SPAN_OTHER_NODES
 536         def_bool y
 537         depends on NEED_MULTIPLE_NODES
 538
 539 config PPC_HAS_HASH_64K
 540         bool
 541         depends on PPC64
 542         default n
 543
 544 config PPC_64K_PAGES
 545         bool "64k page size"
 546         depends on PPC64
 547         select PPC_HAS_HASH_64K
 548         help
 549           This option changes the kernel logical page size to 64k. On machines
 550           without processor support for 64k pages, the kernel will simulate
 551           them by loading each individual 4k page on demand transparently,
 552           while on hardware with such support, it will be used to map
 553           normal application pages.
 554
 555 config SCHED_SMT
 556         bool "SMT (Hyperthreading) scheduler support"
 557         depends on PPC64 && SMP
 558         help
 559           SMT scheduler support improves the CPU scheduler's decision making
 560           when dealing with POWER5 cpus at a cost of slightly increased
 561           overhead in some places. If unsure say N here.
 562
 563 config PROC_DEVICETREE
 564         bool "Support for device tree in /proc"
 565         depends on PROC_FS
 566         help
 567           This option adds a device-tree directory under /proc which contains
 568           an image of the device tree that the kernel copies from Open
 569           Firmware or other boot firmware. If unsure, say Y here.
 570
 571 config CMDLINE_BOOL
 572         bool "Default bootloader kernel arguments"
 573
 574 config CMDLINE
 575         string "Initial kernel command string"
 576         depends on CMDLINE_BOOL
 577         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 578         help
 579           On some platforms, there is currently no way for the boot loader to
 580           pass arguments to the kernel. For these platforms, you can supply
 581           some command-line options at build time by entering them here.  In
 582           most cases you will need to specify the root device here.
 583
 584 if !44x || BROKEN
 585 source kernel/power/Kconfig
 586 endif
 587
 588 config SECCOMP
 589         bool "Enable seccomp to safely compute untrusted bytecode"
 590         depends on PROC_FS
 591         default y
 592         help
 593           This kernel feature is useful for number crunching applications
 594           that may need to compute untrusted bytecode during their
 595           execution. By using pipes or other transports made available to
 596           the process as file descriptors supporting the read/write
 597           syscalls, it's possible to isolate those applications in
 598           their own address space using seccomp. Once seccomp is
 599           enabled via /proc/<pid>/seccomp, it cannot be disabled
 600           and the task is only allowed to execute a few safe syscalls
 601           defined by each seccomp mode.
 602
 603           If unsure, say Y. Only embedded should say N here.
 604
 605 config WANT_DEVICE_TREE
 606         bool
 607         default n
 608
 609 config DEVICE_TREE
 610         string "Static device tree source file"
 611         depends on WANT_DEVICE_TREE
 612         help
 613           This specifies the device tree source (.dts) file to be
 614           compiled and included when building the bootwrapper.  If a
 615           relative filename is given, then it will be relative to
 616           arch/powerpc/boot/dts.  If you are not using the bootwrapper,
 617           or do not need to build a dts into the bootwrapper, this
 618           field is ignored.
 619
 620           For example, this is required when building a cuImage target
 621           for an older U-Boot, which cannot pass a device tree itself.
 622           Such a kernel will not work with a newer U-Boot that tries to
 623           pass a device tree (unless you tell it not to).  If your U-Boot
 624           does not mention a device tree in "help bootm", then use the
 625           cuImage target and specify a device tree here.  Otherwise, use
 626           the uImage target and leave this field blank.
 627
 628 endmenu
 629
 630 config ISA_DMA_API
 631         bool
 632         default y
 633
 634 menu "Bus options"
 635
 636 config ISA
 637         bool "Support for ISA-bus hardware"
 638         depends on PPC_PREP || PPC_CHRP
 639         select PPC_I8259
 640         help
 641           Find out whether you have ISA slots on your motherboard.  ISA is the
 642           name of a bus system, i.e. the way the CPU talks to the other stuff
 643           inside your box.  If you have an Apple machine, say N here; if you
 644           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 645           you have an embedded board, consult your board documentation.
 646
 647 config ZONE_DMA
 648         bool
 649         default y
 650
 651 config GENERIC_ISA_DMA
 652         bool
 653         depends on PPC64 || POWER4 || 6xx && !CPM2
 654         default y
 655
 656 config PPC_INDIRECT_PCI
 657         bool
 658         depends on PCI
 659         default y if 40x || 44x
 660         default n
 661
 662 config PPC_INDIRECT_PCI_BE
 663         bool
 664         depends PPC_INDIRECT_PCI
 665         default n
 666
 667 config EISA
 668         bool
 669
 670 config SBUS
 671         bool
 672
 673 config FSL_SOC
 674         bool
 675
 676 config FSL_PCIE
 677         bool
 678         depends on PPC_86xx
 679
 680 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 681 config MCA
 682         bool
 683
 684 config PCI
 685         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 686                 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
 687                 || MPC7448HPC2 || PPC_PS3 || PPC_HOLLY
 688         default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
 689                 && !PPC_85xx && !PPC_86xx
 690         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
 691         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 692         select ARCH_SUPPORTS_MSI
 693         help
 694           Find out whether your system includes a PCI bus. PCI is the name of
 695           a bus system, i.e. the way the CPU talks to the other stuff inside
 696           your box.  If you say Y here, the kernel will include drivers and
 697           infrastructure code to support PCI bus devices.
 698
 699 config PCI_DOMAINS
 700         bool
 701         default PCI
 702
 703 config PCI_QSPAN
 704         bool "QSpan PCI"
 705         depends on !4xx && !CPM2 && 8xx
 706         select PPC_I8259
 707         help
 708           Say Y here if you have a system based on a Motorola 8xx-series
 709           embedded processor with a QSPAN PCI interface, otherwise say N.
 710
 711 config PCI_8260
 712         bool
 713         depends on PCI && 8260
 714         select PPC_INDIRECT_PCI
 715         default y
 716
 717 config 8260_PCI9
 718         bool "Enable workaround for MPC826x erratum PCI 9"
 719         depends on PCI_8260 && !ADS8272
 720         default y
 721
 722 choice
 723         prompt "IDMA channel for PCI 9 workaround"
 724         depends on 8260_PCI9
 725
 726 config 8260_PCI9_IDMA1
 727         bool "IDMA1"
 728
 729 config 8260_PCI9_IDMA2
 730         bool "IDMA2"
 731
 732 config 8260_PCI9_IDMA3
 733         bool "IDMA3"
 734
 735 config 8260_PCI9_IDMA4
 736         bool "IDMA4"
 737
 738 endchoice
 739
 740 source "drivers/pci/pcie/Kconfig"
 741
 742 source "drivers/pci/Kconfig"
 743
 744 source "drivers/pcmcia/Kconfig"
 745
 746 source "drivers/pci/hotplug/Kconfig"
 747
 748 endmenu
 749
 750 menu "Advanced setup"
 751         depends on PPC32
 752
 753 config ADVANCED_OPTIONS
 754         bool "Prompt for advanced kernel configuration options"
 755         help
 756           This option will enable prompting for a variety of advanced kernel
 757           configuration options.  These options can cause the kernel to not
 758           work if they are set incorrectly, but can be used to optimize certain
 759           aspects of kernel memory management.
 760
 761           Unless you know what you are doing, say N here.
 762
 763 comment "Default settings for advanced configuration options are used"
 764         depends on !ADVANCED_OPTIONS
 765
 766 config HIGHMEM_START_BOOL
 767         bool "Set high memory pool address"
 768         depends on ADVANCED_OPTIONS && HIGHMEM
 769         help
 770           This option allows you to set the base address of the kernel virtual
 771           area used to map high memory pages.  This can be useful in
 772           optimizing the layout of kernel virtual memory.
 773
 774           Say N here unless you know what you are doing.
 775
 776 config HIGHMEM_START
 777         hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
 778         default "0xfe000000"
 779
 780 config LOWMEM_SIZE_BOOL
 781         bool "Set maximum low memory"
 782         depends on ADVANCED_OPTIONS
 783         help
 784           This option allows you to set the maximum amount of memory which
 785           will be used as "low memory", that is, memory which the kernel can
 786           access directly, without having to set up a kernel virtual mapping.
 787           This can be useful in optimizing the layout of kernel virtual
 788           memory.
 789
 790           Say N here unless you know what you are doing.
 791
 792 config LOWMEM_SIZE
 793         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 794         default "0x30000000"
 795
 796 config KERNEL_START_BOOL
 797         bool "Set custom kernel base address"
 798         depends on ADVANCED_OPTIONS
 799         help
 800           This option allows you to set the kernel virtual address at which
 801           the kernel will map low memory (the kernel image will be linked at
 802           this address).  This can be useful in optimizing the virtual memory
 803           layout of the system.
 804
 805           Say N here unless you know what you are doing.
 806
 807 config KERNEL_START
 808         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 809         default "0xc0000000"
 810
 811 config TASK_SIZE_BOOL
 812         bool "Set custom user task size"
 813         depends on ADVANCED_OPTIONS
 814         help
 815           This option allows you to set the amount of virtual address space
 816           allocated to user tasks.  This can be useful in optimizing the
 817           virtual memory layout of the system.
 818
 819           Say N here unless you know what you are doing.
 820
 821 config TASK_SIZE
 822         hex "Size of user task space" if TASK_SIZE_BOOL
 823         default "0x80000000"
 824
 825 config CONSISTENT_START_BOOL
 826         bool "Set custom consistent memory pool address"
 827         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 828         help
 829           This option allows you to set the base virtual address
 830           of the consistent memory pool.  This pool of virtual
 831           memory is used to make consistent memory allocations.
 832
 833 config CONSISTENT_START
 834         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 835         default "0xff100000" if NOT_COHERENT_CACHE
 836
 837 config CONSISTENT_SIZE_BOOL
 838         bool "Set custom consistent memory pool size"
 839         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 840         help
 841           This option allows you to set the size of the
 842           consistent memory pool.  This pool of virtual memory
 843           is used to make consistent memory allocations.
 844
 845 config CONSISTENT_SIZE
 846         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 847         default "0x00200000" if NOT_COHERENT_CACHE
 848
 849 config BOOT_LOAD_BOOL
 850         bool "Set the boot link/load address"
 851         depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
 852         help
 853           This option allows you to set the initial load address of the zImage
 854           or zImage.initrd file.  This can be useful if you are on a board
 855           which has a small amount of memory.
 856
 857           Say N here unless you know what you are doing.
 858
 859 config BOOT_LOAD
 860         hex "Link/load address for booting" if BOOT_LOAD_BOOL
 861         default "0x00400000" if 40x || 8xx || 8260
 862         default "0x01000000" if 44x
 863         default "0x00800000"
 864
 865 config PIN_TLB
 866         bool "Pinned Kernel TLBs (860 ONLY)"
 867         depends on ADVANCED_OPTIONS && 8xx
 868 endmenu
 869
 870 if PPC64
 871 config KERNEL_START
 872         hex
 873         default "0xc000000000000000"
 874 endif
 875
 876 source "net/Kconfig"
 877
 878 source "drivers/Kconfig"
 879
 880 source "fs/Kconfig"
 881
 882 # XXX source "arch/ppc/8xx_io/Kconfig"
 883
 884 # XXX source "arch/ppc/8260_io/Kconfig"
 885
 886 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 887
 888 source "lib/Kconfig"
 889
 890 menu "Instrumentation Support"
 891         depends on EXPERIMENTAL
 892
 893 source "arch/powerpc/oprofile/Kconfig"
 894
 895 config KPROBES
 896         bool "Kprobes (EXPERIMENTAL)"
 897         depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES
 898         help
 899           Kprobes allows you to trap at almost any kernel address and
 900           execute a callback function.  register_kprobe() establishes
 901           a probepoint and specifies the callback.  Kprobes is useful
 902           for kernel debugging, non-intrusive instrumentation and testing.
 903           If in doubt, say "N".
 904 endmenu
 905
 906 source "arch/powerpc/Kconfig.debug"
 907
 908 source "security/Kconfig"
 909
 910 config KEYS_COMPAT
 911         bool
 912         depends on COMPAT && KEYS
 913         default y
 914
 915 source "crypto/Kconfig"