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 PPC32
  15         bool
  16         default y if !PPC64
  17
  18 config 64BIT
  19         bool
  20         default y if PPC64
  21
  22 config PPC_MERGE
  23         def_bool y
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config GENERIC_HARDIRQS
  30         bool
  31         default y
  32
  33 config IRQ_PER_CPU
  34         bool
  35         default y
  36
  37 config RWSEM_GENERIC_SPINLOCK
  38         bool
  39
  40 config RWSEM_XCHGADD_ALGORITHM
  41         bool
  42         default y
  43
  44 config ARCH_HAS_ILOG2_U32
  45         bool
  46         default y
  47
  48 config ARCH_HAS_ILOG2_U64
  49         bool
  50         default y if 64BIT
  51
  52 config GENERIC_HWEIGHT
  53         bool
  54         default y
  55
  56 config GENERIC_CALIBRATE_DELAY
  57         bool
  58         default y
  59
  60 config GENERIC_FIND_NEXT_BIT
  61         bool
  62         default y
  63
  64 config PPC
  65         bool
  66         default y
  67
  68 config EARLY_PRINTK
  69         bool
  70         default y
  71
  72 config COMPAT
  73         bool
  74         default y if PPC64
  75
  76 config SYSVIPC_COMPAT
  77         bool
  78         depends on COMPAT && SYSVIPC
  79         default y
  80
  81 # All PPC32s use generic nvram driver through ppc_md
  82 config GENERIC_NVRAM
  83         bool
  84         default y if PPC32
  85
  86 config SCHED_NO_NO_OMIT_FRAME_POINTER
  87         bool
  88         default y
  89
  90 config ARCH_MAY_HAVE_PC_FDC
  91         bool
  92         default y
  93
  94 config PPC_OF
  95         def_bool y
  96
  97 config PPC_UDBG_16550
  98         bool
  99         default n
 100
 101 config GENERIC_TBSYNC
 102         bool
 103         default y if PPC32 && SMP
 104         default n
 105
 106 config AUDIT_ARCH
 107         bool
 108         default y
 109
 110 config GENERIC_BUG
 111         bool
 112         default y
 113         depends on BUG
 114
 115 config DEFAULT_UIMAGE
 116         bool
 117         help
 118           Used to allow a board to specify it wants a uImage built by default
 119         default n
 120
 121 menu "Processor support"
 122 choice
 123         prompt "Processor Type"
 124         depends on PPC32
 125         default 6xx
 126
 127 config CLASSIC32
 128         bool "52xx/6xx/7xx/74xx"
 129         select PPC_FPU
 130         select 6xx
 131         help
 132           There are four families of PowerPC chips supported.  The more common
 133           types (601, 603, 604, 740, 750, 7400), the Motorola embedded
 134           versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
 135           embedded versions (403 and 405) and the high end 64 bit Power
 136           processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
 137
 138           This option is the catch-all for 6xx types, including some of the
 139           embedded versions.  Unless there is see an option for the specific
 140           chip family you are using, you want this option.
 141
 142           You do not want this if you are building a kernel for a 64 bit
 143           IBM RS/6000 or an Apple G5, choose 6xx.
 144
 145           If unsure, select this option
 146
 147           Note that the kernel runs in 32-bit mode even on 64-bit chips.
 148
 149 config PPC_82xx
 150         bool "Freescale 82xx"
 151         select 6xx
 152         select PPC_FPU
 153
 154 config PPC_83xx
 155         bool "Freescale 83xx"
 156         select 6xx
 157         select FSL_SOC
 158         select 83xx
 159         select PPC_FPU
 160
 161 config PPC_85xx
 162         bool "Freescale 85xx"
 163         select E500
 164         select FSL_SOC
 165         select 85xx
 166
 167 config PPC_86xx
 168         bool "Freescale 86xx"
 169         select 6xx
 170         select FSL_SOC
 171         select PPC_FPU
 172         select ALTIVEC
 173         help
 174           The Freescale E600 SoCs have 74xx cores.
 175
 176 config PPC_8xx
 177         bool "Freescale 8xx"
 178         select FSL_SOC
 179         select 8xx
 180
 181 config 40x
 182         bool "AMCC 40x"
 183         select PPC_DCR_NATIVE
 184
 185 config 44x
 186         bool "AMCC 44x"
 187         select PPC_DCR_NATIVE
 188
 189
 190 config E200
 191         bool "Freescale e200"
 192
 193 endchoice
 194
 195 config POWER4_ONLY
 196         bool "Optimize for POWER4"
 197         depends on PPC64
 198         default n
 199         ---help---
 200           Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
 201           The resulting binary will not work on POWER3 or RS64 processors
 202           when compiled with binutils 2.15 or later.
 203
 204 config POWER3
 205         bool
 206         depends on PPC64
 207         default y if !POWER4_ONLY
 208
 209 config POWER4
 210         depends on PPC64
 211         def_bool y
 212
 213 config 6xx
 214         bool
 215
 216 # this is temp to handle compat with arch=ppc
 217 config 8xx
 218         bool
 219
 220 # this is temp to handle compat with arch=ppc
 221 config 83xx
 222         bool
 223
 224 # this is temp to handle compat with arch=ppc
 225 config 85xx
 226         bool
 227
 228 config E500
 229         bool
 230
 231 config PPC_FPU
 232         bool
 233         default y if PPC64
 234
 235 config PPC_DCR_NATIVE
 236         bool
 237         default n
 238
 239 config PPC_DCR_MMIO
 240         bool
 241         default n
 242
 243 config PPC_DCR
 244         bool
 245         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 246         default y
 247
 248 config PPC_OF_PLATFORM_PCI
 249         bool
 250         depends on PPC64 # not supported on 32 bits yet
 251         default n
 252
 253 config BOOKE
 254         bool
 255         depends on E200 || E500
 256         default y
 257
 258 config FSL_BOOKE
 259         bool
 260         depends on E200 || E500
 261         default y
 262
 263 config PTE_64BIT
 264         bool
 265         depends on 44x || E500
 266         default y if 44x
 267         default y if E500 && PHYS_64BIT
 268
 269 config PHYS_64BIT
 270         bool 'Large physical address support' if E500
 271         depends on 44x || E500
 272         select RESOURCES_64BIT
 273         default y if 44x
 274         ---help---
 275           This option enables kernel support for larger than 32-bit physical
 276           addresses.  This features is not be available on all e500 cores.
 277
 278           If in doubt, say N here.
 279
 280 config ALTIVEC
 281         bool "AltiVec Support"
 282         depends on CLASSIC32 || POWER4
 283         ---help---
 284           This option enables kernel support for the Altivec extensions to the
 285           PowerPC processor. The kernel currently supports saving and restoring
 286           altivec registers, and turning on the 'altivec enable' bit so user
 287           processes can execute altivec instructions.
 288
 289           This option is only usefully if you have a processor that supports
 290           altivec (G4, otherwise known as 74xx series), but does not have
 291           any affect on a non-altivec cpu (it does, however add code to the
 292           kernel).
 293
 294           If in doubt, say Y here.
 295
 296 config SPE
 297         bool "SPE Support"
 298         depends on E200 || E500
 299         default y
 300         ---help---
 301           This option enables kernel support for the Signal Processing
 302           Extensions (SPE) to the PowerPC processor. The kernel currently
 303           supports saving and restoring SPE registers, and turning on the
 304           'spe enable' bit so user processes can execute SPE instructions.
 305
 306           This option is only useful if you have a processor that supports
 307           SPE (e500, otherwise known as 85xx series), but does not have any
 308           effect on a non-spe cpu (it does, however add code to the kernel).
 309
 310           If in doubt, say Y here.
 311
 312 config PPC_STD_MMU
 313         bool
 314         depends on 6xx || POWER3 || POWER4 || PPC64
 315         default y
 316
 317 config PPC_STD_MMU_32
 318         def_bool y
 319         depends on PPC_STD_MMU && PPC32
 320
 321 config VIRT_CPU_ACCOUNTING
 322         bool "Deterministic task and CPU time accounting"
 323         depends on PPC64
 324         default y
 325         help
 326           Select this option to enable more accurate task and CPU time
 327           accounting.  This is done by reading a CPU counter on each
 328           kernel entry and exit and on transitions within the kernel
 329           between system, softirq and hardirq state, so there is a
 330           small performance impact.  This also enables accounting of
 331           stolen time on logically-partitioned systems running on
 332           IBM POWER5-based machines.
 333
 334           If in doubt, say Y here.
 335
 336 config SMP
 337         depends on PPC_STD_MMU
 338         bool "Symmetric multi-processing support"
 339         ---help---
 340           This enables support for systems with more than one CPU. If you have
 341           a system with only one CPU, say N. If you have a system with more
 342           than one CPU, say Y.  Note that the kernel does not currently
 343           support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
 344           since they have inadequate hardware support for multiprocessor
 345           operation.
 346
 347           If you say N here, the kernel will run on single and multiprocessor
 348           machines, but will use only one CPU of a multiprocessor machine. If
 349           you say Y here, the kernel will run on single-processor machines.
 350           On a single-processor machine, the kernel will run faster if you say
 351           N here.
 352
 353           If you don't know what to do here, say N.
 354
 355 config NR_CPUS
 356         int "Maximum number of CPUs (2-128)"
 357         range 2 128
 358         depends on SMP
 359         default "32" if PPC64
 360         default "4"
 361
 362 config NOT_COHERENT_CACHE
 363         bool
 364         depends on 4xx || 8xx || E200
 365         default y
 366 endmenu
 367
 368 source "init/Kconfig"
 369
 370 menu "Platform support"
 371         depends on PPC64 || CLASSIC32
 372
 373 choice
 374         prompt "Machine type"
 375         default PPC_MULTIPLATFORM
 376
 377 config PPC_MULTIPLATFORM
 378         bool "Generic desktop/server/laptop"
 379         help
 380           Select this option if configuring for an IBM pSeries or
 381           RS/6000 machine, an Apple machine, or a PReP, CHRP,
 382           Maple or Cell-based machine.
 383
 384 config EMBEDDED6xx
 385         bool "Embedded 6xx/7xx/7xxx-based board"
 386         depends on PPC32 && (BROKEN||BROKEN_ON_SMP)
 387
 388 config APUS
 389         bool "Amiga-APUS"
 390         depends on PPC32 && BROKEN
 391         help
 392           Select APUS if configuring for a PowerUP Amiga.
 393           More information is available at:
 394           <http://linux-apus.sourceforge.net/>.
 395 endchoice
 396
 397 config QUICC_ENGINE
 398         bool
 399         depends on PPC_MPC836x || PPC_MPC832x
 400         default y
 401         help
 402           The QUICC Engine (QE) is a new generation of communications
 403           coprocessors on Freescale embedded CPUs (akin to CPM in older chips).
 404           Selecting this option means that you wish to build a kernel
 405           for a machine with a QE coprocessor.
 406
 407 config PPC_PSERIES
 408         depends on PPC_MULTIPLATFORM && PPC64
 409         bool "IBM pSeries & new (POWER5-based) iSeries"
 410         select MPIC
 411         select PPC_I8259
 412         select PPC_RTAS
 413         select RTAS_ERROR_LOGGING
 414         select PPC_UDBG_16550
 415         select PPC_NATIVE
 416         default y
 417
 418 config PPC_ISERIES
 419         bool "IBM Legacy iSeries"
 420         depends on PPC_MULTIPLATFORM && PPC64
 421         select PPC_INDIRECT_IO
 422
 423 config PPC_CHRP
 424         bool "Common Hardware Reference Platform (CHRP) based machines"
 425         depends on PPC_MULTIPLATFORM && PPC32
 426         select MPIC
 427         select PPC_I8259
 428         select PPC_INDIRECT_PCI
 429         select PPC_RTAS
 430         select PPC_MPC106
 431         select PPC_UDBG_16550
 432         select PPC_NATIVE
 433         default y
 434
 435 config PPC_MPC52xx
 436         bool
 437         default n
 438
 439 config PPC_MPC5200
 440         bool
 441         select PPC_MPC52xx
 442         default n
 443
 444 config PPC_MPC5200_BUGFIX
 445         bool "MPC5200 (L25R) bugfix support"
 446         depends on PPC_MPC5200
 447         default n
 448         help
 449           Enable workarounds for original MPC5200 errata.  This is not required
 450           for MPC5200B based boards.
 451
 452           It is safe to say 'Y' here
 453
 454 config PPC_EFIKA
 455         bool "bPlan Efika 5k2. MPC5200B based computer"
 456         depends on PPC_MULTIPLATFORM && PPC32
 457         select PPC_RTAS
 458         select RTAS_PROC
 459         select PPC_MPC52xx
 460         select PPC_NATIVE
 461         default n
 462
 463 config PPC_LITE5200
 464         bool "Freescale Lite5200 Eval Board"
 465         depends on PPC_MULTIPLATFORM && PPC32
 466         select PPC_MPC5200
 467         default n
 468
 469 config PPC_PMAC
 470         bool "Apple PowerMac based machines"
 471         depends on PPC_MULTIPLATFORM
 472         select MPIC
 473         select PPC_INDIRECT_PCI if PPC32
 474         select PPC_MPC106 if PPC32
 475         select PPC_NATIVE
 476         default y
 477
 478 config PPC_PMAC64
 479         bool
 480         depends on PPC_PMAC && POWER4
 481         select MPIC
 482         select U3_DART
 483         select MPIC_BROKEN_U3
 484         select GENERIC_TBSYNC
 485         select PPC_970_NAP
 486         default y
 487
 488 config PPC_PREP
 489         bool "PowerPC Reference Platform (PReP) based machines"
 490         depends on PPC_MULTIPLATFORM && PPC32 && BROKEN
 491         select MPIC
 492         select PPC_I8259
 493         select PPC_INDIRECT_PCI
 494         select PPC_UDBG_16550
 495         select PPC_NATIVE
 496         default n
 497
 498 config PPC_MAPLE
 499         depends on PPC_MULTIPLATFORM && PPC64
 500         bool "Maple 970FX Evaluation Board"
 501         select MPIC
 502         select U3_DART
 503         select MPIC_BROKEN_U3
 504         select GENERIC_TBSYNC
 505         select PPC_UDBG_16550
 506         select PPC_970_NAP
 507         select PPC_NATIVE
 508         select PPC_RTAS
 509         select MMIO_NVRAM
 510         select ATA_NONSTANDARD if ATA
 511         default n
 512         help
 513           This option enables support for the Maple 970FX Evaluation Board.
 514           For more information, refer to <http://www.970eval.com>
 515
 516 config PPC_PASEMI
 517         depends on PPC_MULTIPLATFORM && PPC64
 518         bool "PA Semi SoC-based platforms"
 519         default n
 520         select MPIC
 521         select PPC_UDBG_16550
 522         select GENERIC_TBSYNC
 523         select PPC_NATIVE
 524         help
 525           This option enables support for PA Semi's PWRficient line
 526           of SoC processors, including PA6T-1682M
 527
 528 config PPC_CELL
 529         bool
 530         default n
 531
 532 config PPC_CELL_NATIVE
 533         bool
 534         select PPC_CELL
 535         select PPC_DCR_MMIO
 536         select PPC_OF_PLATFORM_PCI
 537         select PPC_INDIRECT_IO
 538         select PPC_NATIVE
 539         select MPIC
 540         default n
 541
 542 config PPC_IBM_CELL_BLADE
 543         bool "IBM Cell Blade"
 544         depends on PPC_MULTIPLATFORM && PPC64
 545         select PPC_CELL_NATIVE
 546         select PPC_RTAS
 547         select MMIO_NVRAM
 548         select PPC_UDBG_16550
 549         select UDBG_RTAS_CONSOLE
 550
 551 config PPC_PS3
 552         bool "Sony PS3 (incomplete)"
 553         depends on PPC_MULTIPLATFORM && PPC64
 554         select PPC_CELL
 555         select USB_ARCH_HAS_OHCI
 556         select USB_OHCI_LITTLE_ENDIAN
 557         select USB_OHCI_BIG_ENDIAN_MMIO
 558         select USB_ARCH_HAS_EHCI
 559         select USB_EHCI_BIG_ENDIAN_MMIO
 560         help
 561           This option enables support for the Sony PS3 game console
 562           and other platforms using the PS3 hypervisor.
 563           Support for this platform is not yet complete, so
 564           enabling this will not result in a bootable kernel on a
 565           PS3 system.
 566
 567 config PPC_CELLEB
 568         bool "Toshiba's Cell Reference Set 'Celleb' Architecture"
 569         depends on PPC_MULTIPLATFORM && PPC64
 570         select PPC_CELL
 571         select PPC_OF_PLATFORM_PCI
 572         select HAS_TXX9_SERIAL
 573         select PPC_UDBG_BEAT
 574         select USB_OHCI_BIG_ENDIAN_MMIO
 575         select USB_EHCI_BIG_ENDIAN_MMIO
 576
 577 config PPC_NATIVE
 578         bool
 579         depends on PPC_MULTIPLATFORM
 580         help
 581           Support for running natively on the hardware, i.e. without
 582           a hypervisor. This option is not user-selectable but should
 583           be selected by all platforms that need it.
 584
 585 config UDBG_RTAS_CONSOLE
 586         bool "RTAS based debug console"
 587         depends on PPC_RTAS
 588         default n
 589
 590 config PPC_UDBG_BEAT
 591         bool "BEAT based debug console"
 592         depends on PPC_CELLEB
 593         default n
 594
 595 config XICS
 596         depends on PPC_PSERIES
 597         bool
 598         default y
 599
 600 config U3_DART
 601         bool
 602         depends on PPC_MULTIPLATFORM && PPC64
 603         default n
 604
 605 config PPC_RTAS
 606         bool
 607         default n
 608
 609 config RTAS_ERROR_LOGGING
 610         bool
 611         depends on PPC_RTAS
 612         default n
 613
 614 config RTAS_PROC
 615         bool "Proc interface to RTAS"
 616         depends on PPC_RTAS
 617         default y
 618
 619 config RTAS_FLASH
 620         tristate "Firmware flash interface"
 621         depends on PPC64 && RTAS_PROC
 622
 623 config MMIO_NVRAM
 624         bool
 625         default n
 626
 627 config MPIC_BROKEN_U3
 628         bool
 629         depends on PPC_MAPLE
 630         default y
 631
 632 config IBMVIO
 633         depends on PPC_PSERIES || PPC_ISERIES
 634         bool
 635         default y
 636
 637 config IBMEBUS
 638         depends on PPC_PSERIES
 639         bool "Support for GX bus based adapters"
 640         help
 641           Bus device driver for GX bus based adapters.
 642
 643 config PPC_MPC106
 644         bool
 645         default n
 646
 647 config PPC_970_NAP
 648         bool
 649         default n
 650
 651 config PPC_INDIRECT_IO
 652         bool
 653         select GENERIC_IOMAP
 654         default n
 655
 656 config GENERIC_IOMAP
 657         bool
 658         default n
 659
 660 source "drivers/cpufreq/Kconfig"
 661
 662 config CPU_FREQ_PMAC
 663         bool "Support for Apple PowerBooks"
 664         depends on CPU_FREQ && ADB_PMU && PPC32
 665         select CPU_FREQ_TABLE
 666         help
 667           This adds support for frequency switching on Apple PowerBooks,
 668           this currently includes some models of iBook & Titanium
 669           PowerBook.
 670
 671 config CPU_FREQ_PMAC64
 672         bool "Support for some Apple G5s"
 673         depends on CPU_FREQ && PPC64
 674         select CPU_FREQ_TABLE
 675         help
 676           This adds support for frequency switching on Apple iMac G5,
 677           and some of the more recent desktop G5 machines as well.
 678
 679 config PPC601_SYNC_FIX
 680         bool "Workarounds for PPC601 bugs"
 681         depends on 6xx && (PPC_PREP || PPC_PMAC)
 682         help
 683           Some versions of the PPC601 (the first PowerPC chip) have bugs which
 684           mean that extra synchronization instructions are required near
 685           certain instructions, typically those that make major changes to the
 686           CPU state.  These extra instructions reduce performance slightly.
 687           If you say N here, these extra instructions will not be included,
 688           resulting in a kernel which will run faster but may not run at all
 689           on some systems with the PPC601 chip.
 690
 691           If in doubt, say Y here.
 692
 693 config TAU
 694         bool "On-chip CPU temperature sensor support"
 695         depends on 6xx
 696         help
 697           G3 and G4 processors have an on-chip temperature sensor called the
 698           'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
 699           temperature within 2-4 degrees Celsius. This option shows the current
 700           on-die temperature in /proc/cpuinfo if the cpu supports it.
 701
 702           Unfortunately, on some chip revisions, this sensor is very inaccurate
 703           and in many cases, does not work at all, so don't assume the cpu
 704           temp is actually what /proc/cpuinfo says it is.
 705
 706 config TAU_INT
 707         bool "Interrupt driven TAU driver (DANGEROUS)"
 708         depends on TAU
 709         ---help---
 710           The TAU supports an interrupt driven mode which causes an interrupt
 711           whenever the temperature goes out of range. This is the fastest way
 712           to get notified the temp has exceeded a range. With this option off,
 713           a timer is used to re-check the temperature periodically.
 714
 715           However, on some cpus it appears that the TAU interrupt hardware
 716           is buggy and can cause a situation which would lead unexplained hard
 717           lockups.
 718
 719           Unless you are extending the TAU driver, or enjoy kernel/hardware
 720           debugging, leave this option off.
 721
 722 config TAU_AVERAGE
 723         bool "Average high and low temp"
 724         depends on TAU
 725         ---help---
 726           The TAU hardware can compare the temperature to an upper and lower
 727           bound.  The default behavior is to show both the upper and lower
 728           bound in /proc/cpuinfo. If the range is large, the temperature is
 729           either changing a lot, or the TAU hardware is broken (likely on some
 730           G4's). If the range is small (around 4 degrees), the temperature is
 731           relatively stable.  If you say Y here, a single temperature value,
 732           halfway between the upper and lower bounds, will be reported in
 733           /proc/cpuinfo.
 734
 735           If in doubt, say N here.
 736
 737 endmenu
 738
 739 source arch/powerpc/platforms/embedded6xx/Kconfig
 740 source arch/powerpc/platforms/4xx/Kconfig
 741 source arch/powerpc/platforms/82xx/Kconfig
 742 source arch/powerpc/platforms/83xx/Kconfig
 743 source arch/powerpc/platforms/85xx/Kconfig
 744 source arch/powerpc/platforms/86xx/Kconfig
 745 source arch/powerpc/platforms/8xx/Kconfig
 746 source arch/powerpc/platforms/cell/Kconfig
 747 source arch/powerpc/platforms/ps3/Kconfig
 748 source arch/powerpc/platforms/pasemi/Kconfig
 749
 750 menu "Kernel options"
 751
 752 config HIGHMEM
 753         bool "High memory support"
 754         depends on PPC32
 755
 756 source kernel/Kconfig.hz
 757 source kernel/Kconfig.preempt
 758 source "fs/Kconfig.binfmt"
 759
 760 # We optimistically allocate largepages from the VM, so make the limit
 761 # large enough (16MB). This badly named config option is actually
 762 # max order + 1
 763 config FORCE_MAX_ZONEORDER
 764         int
 765         depends on PPC64
 766         default "9" if PPC_64K_PAGES
 767         default "13"
 768
 769 config MATH_EMULATION
 770         bool "Math emulation"
 771         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 772         ---help---
 773           Some PowerPC chips designed for embedded applications do not have
 774           a floating-point unit and therefore do not implement the
 775           floating-point instructions in the PowerPC instruction set.  If you
 776           say Y here, the kernel will include code to emulate a floating-point
 777           unit, which will allow programs that use floating-point
 778           instructions to run.
 779
 780 config IOMMU_VMERGE
 781         bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
 782         depends on EXPERIMENTAL && PPC64
 783         default n
 784         help
 785           Cause IO segments sent to a device for DMA to be merged virtually
 786           by the IOMMU when they happen to have been allocated contiguously.
 787           This doesn't add pressure to the IOMMU allocator. However, some
 788           drivers don't support getting large merged segments coming back
 789           from *_map_sg(). Say Y if you know the drivers you are using are
 790           properly handling this case.
 791
 792 config HOTPLUG_CPU
 793         bool "Support for enabling/disabling CPUs"
 794         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 795         ---help---
 796           Say Y here to be able to disable and re-enable individual
 797           CPUs at runtime on SMP machines.
 798
 799           Say N if you are unsure.
 800
 801 config ARCH_ENABLE_MEMORY_HOTPLUG
 802         def_bool y
 803
 804 config KEXEC
 805         bool "kexec system call (EXPERIMENTAL)"
 806         depends on PPC_MULTIPLATFORM && EXPERIMENTAL
 807         help
 808           kexec is a system call that implements the ability to shutdown your
 809           current kernel, and to start another kernel.  It is like a reboot
 810           but it is independent of the system firmware.   And like a reboot
 811           you can start any kernel with it, not just Linux.
 812
 813           The name comes from the similarity to the exec system call.
 814
 815           It is an ongoing process to be certain the hardware in a machine
 816           is properly shutdown, so do not be surprised if this code does not
 817           initially work for you.  It may help to enable device hotplugging
 818           support.  As of this writing the exact hardware interface is
 819           strongly in flux, so no good recommendation can be made.
 820
 821 config CRASH_DUMP
 822         bool "Build a kdump crash kernel (EXPERIMENTAL)"
 823         depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
 824         help
 825           Build a kernel suitable for use as a kdump capture kernel.
 826           The kernel will be linked at a different address than normal, and
 827           so can only be used for Kdump.
 828
 829           Don't change this unless you know what you are doing.
 830
 831 config EMBEDDEDBOOT
 832         bool
 833         depends on 8xx || 8260
 834         default y
 835
 836 config PC_KEYBOARD
 837         bool "PC PS/2 style Keyboard"
 838         depends on 4xx || CPM2
 839
 840 config PPCBUG_NVRAM
 841         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 842         default y if PPC_PREP
 843
 844 config IRQ_ALL_CPUS
 845         bool "Distribute interrupts on all CPUs by default"
 846         depends on SMP && !MV64360
 847         help
 848           This option gives the kernel permission to distribute IRQs across
 849           multiple CPUs.  Saying N here will route all IRQs to the first
 850           CPU.  Generally saying Y is safe, although some problems have been
 851           reported with SMP Power Macintoshes with this option enabled.
 852
 853 source "arch/powerpc/platforms/pseries/Kconfig"
 854
 855 config NUMA
 856         bool "NUMA support"
 857         depends on PPC64
 858         default y if SMP && PPC_PSERIES
 859
 860 config NODES_SHIFT
 861         int
 862         default "4"
 863         depends on NEED_MULTIPLE_NODES
 864
 865 config ARCH_SELECT_MEMORY_MODEL
 866         def_bool y
 867         depends on PPC64
 868
 869 config ARCH_FLATMEM_ENABLE
 870         def_bool y
 871         depends on (PPC64 && !NUMA) || PPC32
 872
 873 config ARCH_SPARSEMEM_ENABLE
 874         def_bool y
 875         depends on PPC64
 876
 877 config ARCH_SPARSEMEM_DEFAULT
 878         def_bool y
 879         depends on (SMP && PPC_PSERIES) || PPC_CELL
 880
 881 config ARCH_POPULATES_NODE_MAP
 882         def_bool y
 883
 884 source "mm/Kconfig"
 885
 886 config ARCH_MEMORY_PROBE
 887         def_bool y
 888         depends on MEMORY_HOTPLUG
 889
 890 # Some NUMA nodes have memory ranges that span
 891 # other nodes.  Even though a pfn is valid and
 892 # between a node's start and end pfns, it may not
 893 # reside on that node.  See memmap_init_zone()
 894 # for details.
 895 config NODES_SPAN_OTHER_NODES
 896         def_bool y
 897         depends on NEED_MULTIPLE_NODES
 898
 899 config PPC_64K_PAGES
 900         bool "64k page size"
 901         depends on PPC64
 902         help
 903           This option changes the kernel logical page size to 64k. On machines
 904           without processor support for 64k pages, the kernel will simulate
 905           them by loading each individual 4k page on demand transparently,
 906           while on hardware with such support, it will be used to map
 907           normal application pages.
 908
 909 config SCHED_SMT
 910         bool "SMT (Hyperthreading) scheduler support"
 911         depends on PPC64 && SMP
 912         help
 913           SMT scheduler support improves the CPU scheduler's decision making
 914           when dealing with POWER5 cpus at a cost of slightly increased
 915           overhead in some places. If unsure say N here.
 916
 917 config PROC_DEVICETREE
 918         bool "Support for device tree in /proc"
 919         depends on PROC_FS
 920         help
 921           This option adds a device-tree directory under /proc which contains
 922           an image of the device tree that the kernel copies from Open
 923           Firmware or other boot firmware. If unsure, say Y here.
 924
 925 source "arch/powerpc/platforms/prep/Kconfig"
 926
 927 config CMDLINE_BOOL
 928         bool "Default bootloader kernel arguments"
 929
 930 config CMDLINE
 931         string "Initial kernel command string"
 932         depends on CMDLINE_BOOL
 933         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 934         help
 935           On some platforms, there is currently no way for the boot loader to
 936           pass arguments to the kernel. For these platforms, you can supply
 937           some command-line options at build time by entering them here.  In
 938           most cases you will need to specify the root device here.
 939
 940 if !44x || BROKEN
 941 source kernel/power/Kconfig
 942 endif
 943
 944 config SECCOMP
 945         bool "Enable seccomp to safely compute untrusted bytecode"
 946         depends on PROC_FS
 947         default y
 948         help
 949           This kernel feature is useful for number crunching applications
 950           that may need to compute untrusted bytecode during their
 951           execution. By using pipes or other transports made available to
 952           the process as file descriptors supporting the read/write
 953           syscalls, it's possible to isolate those applications in
 954           their own address space using seccomp. Once seccomp is
 955           enabled via /proc/<pid>/seccomp, it cannot be disabled
 956           and the task is only allowed to execute a few safe syscalls
 957           defined by each seccomp mode.
 958
 959           If unsure, say Y. Only embedded should say N here.
 960
 961 endmenu
 962
 963 config ISA_DMA_API
 964         bool
 965         default y
 966
 967 menu "Bus options"
 968
 969 config ISA
 970         bool "Support for ISA-bus hardware"
 971         depends on PPC_PREP || PPC_CHRP
 972         select PPC_I8259
 973         help
 974           Find out whether you have ISA slots on your motherboard.  ISA is the
 975           name of a bus system, i.e. the way the CPU talks to the other stuff
 976           inside your box.  If you have an Apple machine, say N here; if you
 977           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 978           you have an embedded board, consult your board documentation.
 979
 980 config GENERIC_ISA_DMA
 981         bool
 982         depends on PPC64 || POWER4 || 6xx && !CPM2
 983         default y
 984
 985 config MPIC
 986         bool
 987         default n
 988
 989 config MPIC_WEIRD
 990         bool
 991         default n
 992
 993 config PPC_I8259
 994         bool
 995         default n
 996
 997 config PPC_INDIRECT_PCI
 998         bool
 999         depends on PCI
1000         default y if 40x || 44x
1001         default n
1002
1003 config EISA
1004         bool
1005
1006 config SBUS
1007         bool
1008
1009 config FSL_SOC
1010         bool
1011
1012 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
1013 config MCA
1014         bool
1015
1016 config PCI
1017         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
1018                 || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) || MPC7448HPC2 || PPC_PS3
1019         default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
1020                 && !PPC_85xx && !PPC_86xx
1021         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
1022         default PCI_QSPAN if !4xx && !CPM2 && 8xx
1023         help
1024           Find out whether your system includes a PCI bus. PCI is the name of
1025           a bus system, i.e. the way the CPU talks to the other stuff inside
1026           your box.  If you say Y here, the kernel will include drivers and
1027           infrastructure code to support PCI bus devices.
1028
1029 config PCI_DOMAINS
1030         bool
1031         default PCI
1032
1033 config PCI_QSPAN
1034         bool "QSpan PCI"
1035         depends on !4xx && !CPM2 && 8xx
1036         select PPC_I8259
1037         help
1038           Say Y here if you have a system based on a Motorola 8xx-series
1039           embedded processor with a QSPAN PCI interface, otherwise say N.
1040
1041 config PCI_8260
1042         bool
1043         depends on PCI && 8260
1044         select PPC_INDIRECT_PCI
1045         default y
1046
1047 config 8260_PCI9
1048         bool "Enable workaround for MPC826x erratum PCI 9"
1049         depends on PCI_8260 && !ADS8272
1050         default y
1051
1052 choice
1053         prompt "IDMA channel for PCI 9 workaround"
1054         depends on 8260_PCI9
1055
1056 config 8260_PCI9_IDMA1
1057         bool "IDMA1"
1058
1059 config 8260_PCI9_IDMA2
1060         bool "IDMA2"
1061
1062 config 8260_PCI9_IDMA3
1063         bool "IDMA3"
1064
1065 config 8260_PCI9_IDMA4
1066         bool "IDMA4"
1067
1068 endchoice
1069
1070 source "drivers/pci/pcie/Kconfig"
1071
1072 source "drivers/pci/Kconfig"
1073
1074 source "drivers/pcmcia/Kconfig"
1075
1076 source "drivers/pci/hotplug/Kconfig"
1077
1078 endmenu
1079
1080 menu "Advanced setup"
1081         depends on PPC32
1082
1083 config ADVANCED_OPTIONS
1084         bool "Prompt for advanced kernel configuration options"
1085         help
1086           This option will enable prompting for a variety of advanced kernel
1087           configuration options.  These options can cause the kernel to not
1088           work if they are set incorrectly, but can be used to optimize certain
1089           aspects of kernel memory management.
1090
1091           Unless you know what you are doing, say N here.
1092
1093 comment "Default settings for advanced configuration options are used"
1094         depends on !ADVANCED_OPTIONS
1095
1096 config HIGHMEM_START_BOOL
1097         bool "Set high memory pool address"
1098         depends on ADVANCED_OPTIONS && HIGHMEM
1099         help
1100           This option allows you to set the base address of the kernel virtual
1101           area used to map high memory pages.  This can be useful in
1102           optimizing the layout of kernel virtual memory.
1103
1104           Say N here unless you know what you are doing.
1105
1106 config HIGHMEM_START
1107         hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
1108         default "0xfe000000"
1109
1110 config LOWMEM_SIZE_BOOL
1111         bool "Set maximum low memory"
1112         depends on ADVANCED_OPTIONS
1113         help
1114           This option allows you to set the maximum amount of memory which
1115           will be used as "low memory", that is, memory which the kernel can
1116           access directly, without having to set up a kernel virtual mapping.
1117           This can be useful in optimizing the layout of kernel virtual
1118           memory.
1119
1120           Say N here unless you know what you are doing.
1121
1122 config LOWMEM_SIZE
1123         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1124         default "0x30000000"
1125
1126 config KERNEL_START_BOOL
1127         bool "Set custom kernel base address"
1128         depends on ADVANCED_OPTIONS
1129         help
1130           This option allows you to set the kernel virtual address at which
1131           the kernel will map low memory (the kernel image will be linked at
1132           this address).  This can be useful in optimizing the virtual memory
1133           layout of the system.
1134
1135           Say N here unless you know what you are doing.
1136
1137 config KERNEL_START
1138         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1139         default "0xc0000000"
1140
1141 config TASK_SIZE_BOOL
1142         bool "Set custom user task size"
1143         depends on ADVANCED_OPTIONS
1144         help
1145           This option allows you to set the amount of virtual address space
1146           allocated to user tasks.  This can be useful in optimizing the
1147           virtual memory layout of the system.
1148
1149           Say N here unless you know what you are doing.
1150
1151 config TASK_SIZE
1152         hex "Size of user task space" if TASK_SIZE_BOOL
1153         default "0x80000000"
1154
1155 config CONSISTENT_START_BOOL
1156         bool "Set custom consistent memory pool address"
1157         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1158         help
1159           This option allows you to set the base virtual address
1160           of the consistent memory pool.  This pool of virtual
1161           memory is used to make consistent memory allocations.
1162
1163 config CONSISTENT_START
1164         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
1165         default "0xff100000" if NOT_COHERENT_CACHE
1166
1167 config CONSISTENT_SIZE_BOOL
1168         bool "Set custom consistent memory pool size"
1169         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1170         help
1171           This option allows you to set the size of the
1172           consistent memory pool.  This pool of virtual memory
1173           is used to make consistent memory allocations.
1174
1175 config CONSISTENT_SIZE
1176         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1177         default "0x00200000" if NOT_COHERENT_CACHE
1178
1179 config BOOT_LOAD_BOOL
1180         bool "Set the boot link/load address"
1181         depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
1182         help
1183           This option allows you to set the initial load address of the zImage
1184           or zImage.initrd file.  This can be useful if you are on a board
1185           which has a small amount of memory.
1186
1187           Say N here unless you know what you are doing.
1188
1189 config BOOT_LOAD
1190         hex "Link/load address for booting" if BOOT_LOAD_BOOL
1191         default "0x00400000" if 40x || 8xx || 8260
1192         default "0x01000000" if 44x
1193         default "0x00800000"
1194
1195 config PIN_TLB
1196         bool "Pinned Kernel TLBs (860 ONLY)"
1197         depends on ADVANCED_OPTIONS && 8xx
1198 endmenu
1199
1200 if PPC64
1201 config KERNEL_START
1202         hex
1203         default "0xc000000000000000"
1204 endif
1205
1206 source "net/Kconfig"
1207
1208 source "drivers/Kconfig"
1209
1210 source "fs/Kconfig"
1211
1212 # XXX source "arch/ppc/8xx_io/Kconfig"
1213
1214 # XXX source "arch/ppc/8260_io/Kconfig"
1215
1216 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1217
1218 source "arch/powerpc/platforms/iseries/Kconfig"
1219
1220 source "lib/Kconfig"
1221
1222 menu "Instrumentation Support"
1223         depends on EXPERIMENTAL
1224
1225 source "arch/powerpc/oprofile/Kconfig"
1226
1227 config KPROBES
1228         bool "Kprobes (EXPERIMENTAL)"
1229         depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES
1230         help
1231           Kprobes allows you to trap at almost any kernel address and
1232           execute a callback function.  register_kprobe() establishes
1233           a probepoint and specifies the callback.  Kprobes is useful
1234           for kernel debugging, non-intrusive instrumentation and testing.
1235           If in doubt, say "N".
1236 endmenu
1237
1238 source "arch/powerpc/Kconfig.debug"
1239
1240 source "security/Kconfig"
1241
1242 config KEYS_COMPAT
1243         bool
1244         depends on COMPAT && KEYS
1245         default y
1246
1247 source "crypto/Kconfig"