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_EFIKA
 440         bool "bPlan Efika 5k2. MPC5200B based computer"
 441         depends on PPC_MULTIPLATFORM && PPC32
 442         select PPC_RTAS
 443         select RTAS_PROC
 444         select PPC_MPC52xx
 445         select PPC_NATIVE
 446         default n
 447
 448 config PPC_LITE5200
 449         bool "Freescale Lite5200 Eval Board"
 450         depends on PPC_MULTIPLATFORM && PPC32
 451         select PPC_MPC52xx
 452         default n
 453
 454 config PPC_PMAC
 455         bool "Apple PowerMac based machines"
 456         depends on PPC_MULTIPLATFORM
 457         select MPIC
 458         select PPC_INDIRECT_PCI if PPC32
 459         select PPC_MPC106 if PPC32
 460         select PPC_NATIVE
 461         default y
 462
 463 config PPC_PMAC64
 464         bool
 465         depends on PPC_PMAC && POWER4
 466         select MPIC
 467         select U3_DART
 468         select MPIC_BROKEN_U3
 469         select GENERIC_TBSYNC
 470         select PPC_970_NAP
 471         default y
 472
 473 config PPC_PREP
 474         bool "PowerPC Reference Platform (PReP) based machines"
 475         depends on PPC_MULTIPLATFORM && PPC32 && BROKEN
 476         select MPIC
 477         select PPC_I8259
 478         select PPC_INDIRECT_PCI
 479         select PPC_UDBG_16550
 480         select PPC_NATIVE
 481         default n
 482
 483 config PPC_MAPLE
 484         depends on PPC_MULTIPLATFORM && PPC64
 485         bool "Maple 970FX Evaluation Board"
 486         select MPIC
 487         select U3_DART
 488         select MPIC_BROKEN_U3
 489         select GENERIC_TBSYNC
 490         select PPC_UDBG_16550
 491         select PPC_970_NAP
 492         select PPC_NATIVE
 493         select PPC_RTAS
 494         select MMIO_NVRAM
 495         select ATA_NONSTANDARD if ATA
 496         default n
 497         help
 498           This option enables support for the Maple 970FX Evaluation Board.
 499           For more information, refer to <http://www.970eval.com>
 500
 501 config PPC_PASEMI
 502         depends on PPC_MULTIPLATFORM && PPC64
 503         bool "PA Semi SoC-based platforms"
 504         default n
 505         select MPIC
 506         select PPC_UDBG_16550
 507         select GENERIC_TBSYNC
 508         select PPC_NATIVE
 509         help
 510           This option enables support for PA Semi's PWRficient line
 511           of SoC processors, including PA6T-1682M
 512
 513 config PPC_CELL
 514         bool
 515         default n
 516
 517 config PPC_CELL_NATIVE
 518         bool
 519         select PPC_CELL
 520         select PPC_DCR_MMIO
 521         select PPC_OF_PLATFORM_PCI
 522         select PPC_INDIRECT_IO
 523         select PPC_NATIVE
 524         select MPIC
 525         default n
 526
 527 config PPC_IBM_CELL_BLADE
 528         bool "IBM Cell Blade"
 529         depends on PPC_MULTIPLATFORM && PPC64
 530         select PPC_CELL_NATIVE
 531         select PPC_RTAS
 532         select MMIO_NVRAM
 533         select PPC_UDBG_16550
 534         select UDBG_RTAS_CONSOLE
 535
 536 config PPC_PS3
 537         bool "Sony PS3 (incomplete)"
 538         depends on PPC_MULTIPLATFORM && PPC64
 539         select PPC_CELL
 540         help
 541           This option enables support for the Sony PS3 game console
 542           and other platforms using the PS3 hypervisor.
 543           Support for this platform is not yet complete, so
 544           enabling this will not result in a bootable kernel on a
 545           PS3 system.
 546
 547 config PPC_CELLEB
 548         bool "Toshiba's Cell Reference Set 'Celleb' Architecture"
 549         depends on PPC_MULTIPLATFORM && PPC64
 550         select PPC_CELL
 551         select PPC_OF_PLATFORM_PCI
 552         select HAS_TXX9_SERIAL
 553         select PPC_UDBG_BEAT
 554         select USB_OHCI_BIG_ENDIAN_MMIO
 555         select USB_EHCI_BIG_ENDIAN_MMIO
 556
 557 config PPC_NATIVE
 558         bool
 559         depends on PPC_MULTIPLATFORM
 560         help
 561           Support for running natively on the hardware, i.e. without
 562           a hypervisor. This option is not user-selectable but should
 563           be selected by all platforms that need it.
 564
 565 config UDBG_RTAS_CONSOLE
 566         bool "RTAS based debug console"
 567         depends on PPC_RTAS
 568         default n
 569
 570 config PPC_UDBG_BEAT
 571         bool "BEAT based debug console"
 572         depends on PPC_CELLEB
 573         default n
 574
 575 config XICS
 576         depends on PPC_PSERIES
 577         bool
 578         default y
 579
 580 config U3_DART
 581         bool
 582         depends on PPC_MULTIPLATFORM && PPC64
 583         default n
 584
 585 config PPC_RTAS
 586         bool
 587         default n
 588
 589 config RTAS_ERROR_LOGGING
 590         bool
 591         depends on PPC_RTAS
 592         default n
 593
 594 config RTAS_PROC
 595         bool "Proc interface to RTAS"
 596         depends on PPC_RTAS
 597         default y
 598
 599 config RTAS_FLASH
 600         tristate "Firmware flash interface"
 601         depends on PPC64 && RTAS_PROC
 602
 603 config MMIO_NVRAM
 604         bool
 605         default n
 606
 607 config MPIC_BROKEN_U3
 608         bool
 609         depends on PPC_MAPLE
 610         default y
 611
 612 config IBMVIO
 613         depends on PPC_PSERIES || PPC_ISERIES
 614         bool
 615         default y
 616
 617 config IBMEBUS
 618         depends on PPC_PSERIES
 619         bool "Support for GX bus based adapters"
 620         help
 621           Bus device driver for GX bus based adapters.
 622
 623 config PPC_MPC106
 624         bool
 625         default n
 626
 627 config PPC_970_NAP
 628         bool
 629         default n
 630
 631 config PPC_INDIRECT_IO
 632         bool
 633         select GENERIC_IOMAP
 634         default n
 635
 636 config GENERIC_IOMAP
 637         bool
 638         default n
 639
 640 source "drivers/cpufreq/Kconfig"
 641
 642 config CPU_FREQ_PMAC
 643         bool "Support for Apple PowerBooks"
 644         depends on CPU_FREQ && ADB_PMU && PPC32
 645         select CPU_FREQ_TABLE
 646         help
 647           This adds support for frequency switching on Apple PowerBooks,
 648           this currently includes some models of iBook & Titanium
 649           PowerBook.
 650
 651 config CPU_FREQ_PMAC64
 652         bool "Support for some Apple G5s"
 653         depends on CPU_FREQ && PPC64
 654         select CPU_FREQ_TABLE
 655         help
 656           This adds support for frequency switching on Apple iMac G5,
 657           and some of the more recent desktop G5 machines as well.
 658
 659 config PPC601_SYNC_FIX
 660         bool "Workarounds for PPC601 bugs"
 661         depends on 6xx && (PPC_PREP || PPC_PMAC)
 662         help
 663           Some versions of the PPC601 (the first PowerPC chip) have bugs which
 664           mean that extra synchronization instructions are required near
 665           certain instructions, typically those that make major changes to the
 666           CPU state.  These extra instructions reduce performance slightly.
 667           If you say N here, these extra instructions will not be included,
 668           resulting in a kernel which will run faster but may not run at all
 669           on some systems with the PPC601 chip.
 670
 671           If in doubt, say Y here.
 672
 673 config TAU
 674         bool "On-chip CPU temperature sensor support"
 675         depends on 6xx
 676         help
 677           G3 and G4 processors have an on-chip temperature sensor called the
 678           'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
 679           temperature within 2-4 degrees Celsius. This option shows the current
 680           on-die temperature in /proc/cpuinfo if the cpu supports it.
 681
 682           Unfortunately, on some chip revisions, this sensor is very inaccurate
 683           and in many cases, does not work at all, so don't assume the cpu
 684           temp is actually what /proc/cpuinfo says it is.
 685
 686 config TAU_INT
 687         bool "Interrupt driven TAU driver (DANGEROUS)"
 688         depends on TAU
 689         ---help---
 690           The TAU supports an interrupt driven mode which causes an interrupt
 691           whenever the temperature goes out of range. This is the fastest way
 692           to get notified the temp has exceeded a range. With this option off,
 693           a timer is used to re-check the temperature periodically.
 694
 695           However, on some cpus it appears that the TAU interrupt hardware
 696           is buggy and can cause a situation which would lead unexplained hard
 697           lockups.
 698
 699           Unless you are extending the TAU driver, or enjoy kernel/hardware
 700           debugging, leave this option off.
 701
 702 config TAU_AVERAGE
 703         bool "Average high and low temp"
 704         depends on TAU
 705         ---help---
 706           The TAU hardware can compare the temperature to an upper and lower
 707           bound.  The default behavior is to show both the upper and lower
 708           bound in /proc/cpuinfo. If the range is large, the temperature is
 709           either changing a lot, or the TAU hardware is broken (likely on some
 710           G4's). If the range is small (around 4 degrees), the temperature is
 711           relatively stable.  If you say Y here, a single temperature value,
 712           halfway between the upper and lower bounds, will be reported in
 713           /proc/cpuinfo.
 714
 715           If in doubt, say N here.
 716
 717 endmenu
 718
 719 source arch/powerpc/platforms/embedded6xx/Kconfig
 720 source arch/powerpc/platforms/4xx/Kconfig
 721 source arch/powerpc/platforms/82xx/Kconfig
 722 source arch/powerpc/platforms/83xx/Kconfig
 723 source arch/powerpc/platforms/85xx/Kconfig
 724 source arch/powerpc/platforms/86xx/Kconfig
 725 source arch/powerpc/platforms/8xx/Kconfig
 726 source arch/powerpc/platforms/cell/Kconfig
 727 source arch/powerpc/platforms/ps3/Kconfig
 728 source arch/powerpc/platforms/pasemi/Kconfig
 729
 730 menu "Kernel options"
 731
 732 config HIGHMEM
 733         bool "High memory support"
 734         depends on PPC32
 735
 736 source kernel/Kconfig.hz
 737 source kernel/Kconfig.preempt
 738 source "fs/Kconfig.binfmt"
 739
 740 # We optimistically allocate largepages from the VM, so make the limit
 741 # large enough (16MB). This badly named config option is actually
 742 # max order + 1
 743 config FORCE_MAX_ZONEORDER
 744         int
 745         depends on PPC64
 746         default "9" if PPC_64K_PAGES
 747         default "13"
 748
 749 config MATH_EMULATION
 750         bool "Math emulation"
 751         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 752         ---help---
 753           Some PowerPC chips designed for embedded applications do not have
 754           a floating-point unit and therefore do not implement the
 755           floating-point instructions in the PowerPC instruction set.  If you
 756           say Y here, the kernel will include code to emulate a floating-point
 757           unit, which will allow programs that use floating-point
 758           instructions to run.
 759
 760 config IOMMU_VMERGE
 761         bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
 762         depends on EXPERIMENTAL && PPC64
 763         default n
 764         help
 765           Cause IO segments sent to a device for DMA to be merged virtually
 766           by the IOMMU when they happen to have been allocated contiguously.
 767           This doesn't add pressure to the IOMMU allocator. However, some
 768           drivers don't support getting large merged segments coming back
 769           from *_map_sg(). Say Y if you know the drivers you are using are
 770           properly handling this case.
 771
 772 config HOTPLUG_CPU
 773         bool "Support for enabling/disabling CPUs"
 774         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 775         ---help---
 776           Say Y here to be able to disable and re-enable individual
 777           CPUs at runtime on SMP machines.
 778
 779           Say N if you are unsure.
 780
 781 config ARCH_ENABLE_MEMORY_HOTPLUG
 782         def_bool y
 783
 784 config KEXEC
 785         bool "kexec system call (EXPERIMENTAL)"
 786         depends on PPC_MULTIPLATFORM && EXPERIMENTAL
 787         help
 788           kexec is a system call that implements the ability to shutdown your
 789           current kernel, and to start another kernel.  It is like a reboot
 790           but it is independent of the system firmware.   And like a reboot
 791           you can start any kernel with it, not just Linux.
 792
 793           The name comes from the similarity to the exec system call.
 794
 795           It is an ongoing process to be certain the hardware in a machine
 796           is properly shutdown, so do not be surprised if this code does not
 797           initially work for you.  It may help to enable device hotplugging
 798           support.  As of this writing the exact hardware interface is
 799           strongly in flux, so no good recommendation can be made.
 800
 801 config CRASH_DUMP
 802         bool "Build a kdump crash kernel (EXPERIMENTAL)"
 803         depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
 804         help
 805           Build a kernel suitable for use as a kdump capture kernel.
 806           The kernel will be linked at a different address than normal, and
 807           so can only be used for Kdump.
 808
 809           Don't change this unless you know what you are doing.
 810
 811 config EMBEDDEDBOOT
 812         bool
 813         depends on 8xx || 8260
 814         default y
 815
 816 config PC_KEYBOARD
 817         bool "PC PS/2 style Keyboard"
 818         depends on 4xx || CPM2
 819
 820 config PPCBUG_NVRAM
 821         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 822         default y if PPC_PREP
 823
 824 config IRQ_ALL_CPUS
 825         bool "Distribute interrupts on all CPUs by default"
 826         depends on SMP && !MV64360
 827         help
 828           This option gives the kernel permission to distribute IRQs across
 829           multiple CPUs.  Saying N here will route all IRQs to the first
 830           CPU.  Generally saying Y is safe, although some problems have been
 831           reported with SMP Power Macintoshes with this option enabled.
 832
 833 source "arch/powerpc/platforms/pseries/Kconfig"
 834
 835 config NUMA
 836         bool "NUMA support"
 837         depends on PPC64
 838         default y if SMP && PPC_PSERIES
 839
 840 config NODES_SHIFT
 841         int
 842         default "4"
 843         depends on NEED_MULTIPLE_NODES
 844
 845 config ARCH_SELECT_MEMORY_MODEL
 846         def_bool y
 847         depends on PPC64
 848
 849 config ARCH_FLATMEM_ENABLE
 850         def_bool y
 851         depends on (PPC64 && !NUMA) || PPC32
 852
 853 config ARCH_SPARSEMEM_ENABLE
 854         def_bool y
 855         depends on PPC64
 856
 857 config ARCH_SPARSEMEM_DEFAULT
 858         def_bool y
 859         depends on (SMP && PPC_PSERIES) || PPC_CELL
 860
 861 config ARCH_POPULATES_NODE_MAP
 862         def_bool y
 863
 864 source "mm/Kconfig"
 865
 866 config ARCH_MEMORY_PROBE
 867         def_bool y
 868         depends on MEMORY_HOTPLUG
 869
 870 # Some NUMA nodes have memory ranges that span
 871 # other nodes.  Even though a pfn is valid and
 872 # between a node's start and end pfns, it may not
 873 # reside on that node.  See memmap_init_zone()
 874 # for details.
 875 config NODES_SPAN_OTHER_NODES
 876         def_bool y
 877         depends on NEED_MULTIPLE_NODES
 878
 879 config PPC_64K_PAGES
 880         bool "64k page size"
 881         depends on PPC64
 882         help
 883           This option changes the kernel logical page size to 64k. On machines
 884           without processor support for 64k pages, the kernel will simulate
 885           them by loading each individual 4k page on demand transparently,
 886           while on hardware with such support, it will be used to map
 887           normal application pages.
 888
 889 config SCHED_SMT
 890         bool "SMT (Hyperthreading) scheduler support"
 891         depends on PPC64 && SMP
 892         help
 893           SMT scheduler support improves the CPU scheduler's decision making
 894           when dealing with POWER5 cpus at a cost of slightly increased
 895           overhead in some places. If unsure say N here.
 896
 897 config PROC_DEVICETREE
 898         bool "Support for device tree in /proc"
 899         depends on PROC_FS
 900         help
 901           This option adds a device-tree directory under /proc which contains
 902           an image of the device tree that the kernel copies from Open
 903           Firmware or other boot firmware. If unsure, say Y here.
 904
 905 source "arch/powerpc/platforms/prep/Kconfig"
 906
 907 config CMDLINE_BOOL
 908         bool "Default bootloader kernel arguments"
 909
 910 config CMDLINE
 911         string "Initial kernel command string"
 912         depends on CMDLINE_BOOL
 913         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 914         help
 915           On some platforms, there is currently no way for the boot loader to
 916           pass arguments to the kernel. For these platforms, you can supply
 917           some command-line options at build time by entering them here.  In
 918           most cases you will need to specify the root device here.
 919
 920 if !44x || BROKEN
 921 source kernel/power/Kconfig
 922 endif
 923
 924 config SECCOMP
 925         bool "Enable seccomp to safely compute untrusted bytecode"
 926         depends on PROC_FS
 927         default y
 928         help
 929           This kernel feature is useful for number crunching applications
 930           that may need to compute untrusted bytecode during their
 931           execution. By using pipes or other transports made available to
 932           the process as file descriptors supporting the read/write
 933           syscalls, it's possible to isolate those applications in
 934           their own address space using seccomp. Once seccomp is
 935           enabled via /proc/<pid>/seccomp, it cannot be disabled
 936           and the task is only allowed to execute a few safe syscalls
 937           defined by each seccomp mode.
 938
 939           If unsure, say Y. Only embedded should say N here.
 940
 941 endmenu
 942
 943 config ISA_DMA_API
 944         bool
 945         default y
 946
 947 menu "Bus options"
 948
 949 config ISA
 950         bool "Support for ISA-bus hardware"
 951         depends on PPC_PREP || PPC_CHRP
 952         select PPC_I8259
 953         help
 954           Find out whether you have ISA slots on your motherboard.  ISA is the
 955           name of a bus system, i.e. the way the CPU talks to the other stuff
 956           inside your box.  If you have an Apple machine, say N here; if you
 957           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 958           you have an embedded board, consult your board documentation.
 959
 960 config GENERIC_ISA_DMA
 961         bool
 962         depends on PPC64 || POWER4 || 6xx && !CPM2
 963         default y
 964
 965 config MPIC
 966         bool
 967         default n
 968
 969 config MPIC_WEIRD
 970         bool
 971         default n
 972
 973 config PPC_I8259
 974         bool
 975         default n
 976
 977 config PPC_INDIRECT_PCI
 978         bool
 979         depends on PCI
 980         default y if 40x || 44x
 981         default n
 982
 983 config EISA
 984         bool
 985
 986 config SBUS
 987         bool
 988
 989 config FSL_SOC
 990         bool
 991
 992 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 993 config MCA
 994         bool
 995
 996 config PCI
 997         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 998                 || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) || MPC7448HPC2 || PPC_PS3
 999         default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
1000                 && !PPC_85xx && !PPC_86xx
1001         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
1002         default PCI_QSPAN if !4xx && !CPM2 && 8xx
1003         help
1004           Find out whether your system includes a PCI bus. PCI is the name of
1005           a bus system, i.e. the way the CPU talks to the other stuff inside
1006           your box.  If you say Y here, the kernel will include drivers and
1007           infrastructure code to support PCI bus devices.
1008
1009 config PCI_DOMAINS
1010         bool
1011         default PCI
1012
1013 config PCI_QSPAN
1014         bool "QSpan PCI"
1015         depends on !4xx && !CPM2 && 8xx
1016         select PPC_I8259
1017         help
1018           Say Y here if you have a system based on a Motorola 8xx-series
1019           embedded processor with a QSPAN PCI interface, otherwise say N.
1020
1021 config PCI_8260
1022         bool
1023         depends on PCI && 8260
1024         select PPC_INDIRECT_PCI
1025         default y
1026
1027 config 8260_PCI9
1028         bool "Enable workaround for MPC826x erratum PCI 9"
1029         depends on PCI_8260 && !ADS8272
1030         default y
1031
1032 choice
1033         prompt "IDMA channel for PCI 9 workaround"
1034         depends on 8260_PCI9
1035
1036 config 8260_PCI9_IDMA1
1037         bool "IDMA1"
1038
1039 config 8260_PCI9_IDMA2
1040         bool "IDMA2"
1041
1042 config 8260_PCI9_IDMA3
1043         bool "IDMA3"
1044
1045 config 8260_PCI9_IDMA4
1046         bool "IDMA4"
1047
1048 endchoice
1049
1050 source "drivers/pci/pcie/Kconfig"
1051
1052 source "drivers/pci/Kconfig"
1053
1054 source "drivers/pcmcia/Kconfig"
1055
1056 source "drivers/pci/hotplug/Kconfig"
1057
1058 endmenu
1059
1060 menu "Advanced setup"
1061         depends on PPC32
1062
1063 config ADVANCED_OPTIONS
1064         bool "Prompt for advanced kernel configuration options"
1065         help
1066           This option will enable prompting for a variety of advanced kernel
1067           configuration options.  These options can cause the kernel to not
1068           work if they are set incorrectly, but can be used to optimize certain
1069           aspects of kernel memory management.
1070
1071           Unless you know what you are doing, say N here.
1072
1073 comment "Default settings for advanced configuration options are used"
1074         depends on !ADVANCED_OPTIONS
1075
1076 config HIGHMEM_START_BOOL
1077         bool "Set high memory pool address"
1078         depends on ADVANCED_OPTIONS && HIGHMEM
1079         help
1080           This option allows you to set the base address of the kernel virtual
1081           area used to map high memory pages.  This can be useful in
1082           optimizing the layout of kernel virtual memory.
1083
1084           Say N here unless you know what you are doing.
1085
1086 config HIGHMEM_START
1087         hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
1088         default "0xfe000000"
1089
1090 config LOWMEM_SIZE_BOOL
1091         bool "Set maximum low memory"
1092         depends on ADVANCED_OPTIONS
1093         help
1094           This option allows you to set the maximum amount of memory which
1095           will be used as "low memory", that is, memory which the kernel can
1096           access directly, without having to set up a kernel virtual mapping.
1097           This can be useful in optimizing the layout of kernel virtual
1098           memory.
1099
1100           Say N here unless you know what you are doing.
1101
1102 config LOWMEM_SIZE
1103         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1104         default "0x30000000"
1105
1106 config KERNEL_START_BOOL
1107         bool "Set custom kernel base address"
1108         depends on ADVANCED_OPTIONS
1109         help
1110           This option allows you to set the kernel virtual address at which
1111           the kernel will map low memory (the kernel image will be linked at
1112           this address).  This can be useful in optimizing the virtual memory
1113           layout of the system.
1114
1115           Say N here unless you know what you are doing.
1116
1117 config KERNEL_START
1118         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1119         default "0xc0000000"
1120
1121 config TASK_SIZE_BOOL
1122         bool "Set custom user task size"
1123         depends on ADVANCED_OPTIONS
1124         help
1125           This option allows you to set the amount of virtual address space
1126           allocated to user tasks.  This can be useful in optimizing the
1127           virtual memory layout of the system.
1128
1129           Say N here unless you know what you are doing.
1130
1131 config TASK_SIZE
1132         hex "Size of user task space" if TASK_SIZE_BOOL
1133         default "0x80000000"
1134
1135 config CONSISTENT_START_BOOL
1136         bool "Set custom consistent memory pool address"
1137         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1138         help
1139           This option allows you to set the base virtual address
1140           of the consistent memory pool.  This pool of virtual
1141           memory is used to make consistent memory allocations.
1142
1143 config CONSISTENT_START
1144         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
1145         default "0xff100000" if NOT_COHERENT_CACHE
1146
1147 config CONSISTENT_SIZE_BOOL
1148         bool "Set custom consistent memory pool size"
1149         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1150         help
1151           This option allows you to set the size of the
1152           consistent memory pool.  This pool of virtual memory
1153           is used to make consistent memory allocations.
1154
1155 config CONSISTENT_SIZE
1156         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1157         default "0x00200000" if NOT_COHERENT_CACHE
1158
1159 config BOOT_LOAD_BOOL
1160         bool "Set the boot link/load address"
1161         depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
1162         help
1163           This option allows you to set the initial load address of the zImage
1164           or zImage.initrd file.  This can be useful if you are on a board
1165           which has a small amount of memory.
1166
1167           Say N here unless you know what you are doing.
1168
1169 config BOOT_LOAD
1170         hex "Link/load address for booting" if BOOT_LOAD_BOOL
1171         default "0x00400000" if 40x || 8xx || 8260
1172         default "0x01000000" if 44x
1173         default "0x00800000"
1174
1175 config PIN_TLB
1176         bool "Pinned Kernel TLBs (860 ONLY)"
1177         depends on ADVANCED_OPTIONS && 8xx
1178 endmenu
1179
1180 if PPC64
1181 config KERNEL_START
1182         hex
1183         default "0xc000000000000000"
1184 endif
1185
1186 source "net/Kconfig"
1187
1188 source "drivers/Kconfig"
1189
1190 source "fs/Kconfig"
1191
1192 # XXX source "arch/ppc/8xx_io/Kconfig"
1193
1194 # XXX source "arch/ppc/8260_io/Kconfig"
1195
1196 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1197
1198 source "arch/powerpc/platforms/iseries/Kconfig"
1199
1200 source "lib/Kconfig"
1201
1202 menu "Instrumentation Support"
1203         depends on EXPERIMENTAL
1204
1205 source "arch/powerpc/oprofile/Kconfig"
1206
1207 config KPROBES
1208         bool "Kprobes (EXPERIMENTAL)"
1209         depends on PPC64 && KALLSYMS && EXPERIMENTAL && MODULES
1210         help
1211           Kprobes allows you to trap at almost any kernel address and
1212           execute a callback function.  register_kprobe() establishes
1213           a probepoint and specifies the callback.  Kprobes is useful
1214           for kernel debugging, non-intrusive instrumentation and testing.
1215           If in doubt, say "N".
1216 endmenu
1217
1218 source "arch/powerpc/Kconfig.debug"
1219
1220 source "security/Kconfig"
1221
1222 config KEYS_COMPAT
1223         bool
1224         depends on COMPAT && KEYS
1225         default y
1226
1227 source "crypto/Kconfig"