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 GENERIC_HWEIGHT
  45         bool
  46         default y
  47
  48 config GENERIC_CALIBRATE_DELAY
  49         bool
  50         default y
  51
  52 config GENERIC_FIND_NEXT_BIT
  53         bool
  54         default y
  55
  56 config PPC
  57         bool
  58         default y
  59
  60 config EARLY_PRINTK
  61         bool
  62         default y
  63
  64 config COMPAT
  65         bool
  66         default y if PPC64
  67
  68 config SYSVIPC_COMPAT
  69         bool
  70         depends on COMPAT && SYSVIPC
  71         default y
  72
  73 # All PPC32s use generic nvram driver through ppc_md
  74 config GENERIC_NVRAM
  75         bool
  76         default y if PPC32
  77
  78 config SCHED_NO_NO_OMIT_FRAME_POINTER
  79         bool
  80         default y
  81
  82 config ARCH_MAY_HAVE_PC_FDC
  83         bool
  84         default y
  85
  86 config PPC_OF
  87         def_bool y
  88
  89 config PPC_UDBG_16550
  90         bool
  91         default n
  92
  93 config GENERIC_TBSYNC
  94         bool
  95         default y if PPC32 && SMP
  96         default n
  97
  98 config AUDIT_ARCH
  99         bool
 100         default y
 101
 102 config DEFAULT_UIMAGE
 103         bool
 104         help
 105           Used to allow a board to specify it wants a uImage built by default
 106         default n
 107
 108 menu "Processor support"
 109 choice
 110         prompt "Processor Type"
 111         depends on PPC32
 112         default 6xx
 113
 114 config CLASSIC32
 115         bool "6xx/7xx/74xx"
 116         select PPC_FPU
 117         select 6xx
 118         help
 119           There are four families of PowerPC chips supported.  The more common
 120           types (601, 603, 604, 740, 750, 7400), the Motorola embedded
 121           versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
 122           embedded versions (403 and 405) and the high end 64 bit Power
 123           processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
 124
 125           Unless you are building a kernel for one of the embedded processor
 126           systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx.
 127           Note that the kernel runs in 32-bit mode even on 64-bit chips.
 128
 129 config PPC_52xx
 130         bool "Freescale 52xx"
 131         select 6xx
 132         select PPC_FPU
 133
 134 config PPC_82xx
 135         bool "Freescale 82xx"
 136         select 6xx
 137         select PPC_FPU
 138
 139 config PPC_83xx
 140         bool "Freescale 83xx"
 141         select 6xx
 142         select FSL_SOC
 143         select 83xx
 144         select PPC_FPU
 145
 146 config PPC_85xx
 147         bool "Freescale 85xx"
 148         select E500
 149         select FSL_SOC
 150         select 85xx
 151
 152 config PPC_86xx
 153         bool "Freescale 86xx"
 154         select 6xx
 155         select FSL_SOC
 156         select PPC_FPU
 157         select ALTIVEC
 158         help
 159           The Freescale E600 SoCs have 74xx cores.
 160
 161 config 40x
 162         bool "AMCC 40x"
 163
 164 config 44x
 165         bool "AMCC 44x"
 166
 167 config 8xx
 168         bool "Freescale 8xx"
 169
 170 config E200
 171         bool "Freescale e200"
 172
 173 endchoice
 174
 175 config POWER4_ONLY
 176         bool "Optimize for POWER4"
 177         depends on PPC64
 178         default n
 179         ---help---
 180           Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
 181           The resulting binary will not work on POWER3 or RS64 processors
 182           when compiled with binutils 2.15 or later.
 183
 184 config POWER3
 185         bool
 186         depends on PPC64
 187         default y if !POWER4_ONLY
 188
 189 config POWER4
 190         depends on PPC64
 191         def_bool y
 192
 193 config 6xx
 194         bool
 195
 196 # this is temp to handle compat with arch=ppc
 197 config 83xx
 198         bool
 199
 200 # this is temp to handle compat with arch=ppc
 201 config 85xx
 202         bool
 203
 204 config E500
 205         bool
 206
 207 config PPC_FPU
 208         bool
 209         default y if PPC64
 210
 211 config BOOKE
 212         bool
 213         depends on E200 || E500
 214         default y
 215
 216 config FSL_BOOKE
 217         bool
 218         depends on E200 || E500
 219         default y
 220
 221 config PTE_64BIT
 222         bool
 223         depends on 44x || E500
 224         default y if 44x
 225         default y if E500 && PHYS_64BIT
 226
 227 config PHYS_64BIT
 228         bool 'Large physical address support' if E500
 229         depends on 44x || E500
 230         default y if 44x
 231         ---help---
 232           This option enables kernel support for larger than 32-bit physical
 233           addresses.  This features is not be available on all e500 cores.
 234
 235           If in doubt, say N here.
 236
 237 config ALTIVEC
 238         bool "AltiVec Support"
 239         depends on CLASSIC32 || POWER4
 240         ---help---
 241           This option enables kernel support for the Altivec extensions to the
 242           PowerPC processor. The kernel currently supports saving and restoring
 243           altivec registers, and turning on the 'altivec enable' bit so user
 244           processes can execute altivec instructions.
 245
 246           This option is only usefully if you have a processor that supports
 247           altivec (G4, otherwise known as 74xx series), but does not have
 248           any affect on a non-altivec cpu (it does, however add code to the
 249           kernel).
 250
 251           If in doubt, say Y here.
 252
 253 config SPE
 254         bool "SPE Support"
 255         depends on E200 || E500
 256         default y
 257         ---help---
 258           This option enables kernel support for the Signal Processing
 259           Extensions (SPE) to the PowerPC processor. The kernel currently
 260           supports saving and restoring SPE registers, and turning on the
 261           'spe enable' bit so user processes can execute SPE instructions.
 262
 263           This option is only useful if you have a processor that supports
 264           SPE (e500, otherwise known as 85xx series), but does not have any
 265           effect on a non-spe cpu (it does, however add code to the kernel).
 266
 267           If in doubt, say Y here.
 268
 269 config PPC_STD_MMU
 270         bool
 271         depends on 6xx || POWER3 || POWER4 || PPC64
 272         default y
 273
 274 config PPC_STD_MMU_32
 275         def_bool y
 276         depends on PPC_STD_MMU && PPC32
 277
 278 config VIRT_CPU_ACCOUNTING
 279         bool "Deterministic task and CPU time accounting"
 280         depends on PPC64
 281         default y
 282         help
 283           Select this option to enable more accurate task and CPU time
 284           accounting.  This is done by reading a CPU counter on each
 285           kernel entry and exit and on transitions within the kernel
 286           between system, softirq and hardirq state, so there is a
 287           small performance impact.  This also enables accounting of
 288           stolen time on logically-partitioned systems running on
 289           IBM POWER5-based machines.
 290
 291           If in doubt, say Y here.
 292
 293 config SMP
 294         depends on PPC_STD_MMU
 295         bool "Symmetric multi-processing support"
 296         ---help---
 297           This enables support for systems with more than one CPU. If you have
 298           a system with only one CPU, say N. If you have a system with more
 299           than one CPU, say Y.  Note that the kernel does not currently
 300           support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
 301           since they have inadequate hardware support for multiprocessor
 302           operation.
 303
 304           If you say N here, the kernel will run on single and multiprocessor
 305           machines, but will use only one CPU of a multiprocessor machine. If
 306           you say Y here, the kernel will run on single-processor machines.
 307           On a single-processor machine, the kernel will run faster if you say
 308           N here.
 309
 310           If you don't know what to do here, say N.
 311
 312 config NR_CPUS
 313         int "Maximum number of CPUs (2-128)"
 314         range 2 128
 315         depends on SMP
 316         default "32" if PPC64
 317         default "4"
 318
 319 config NOT_COHERENT_CACHE
 320         bool
 321         depends on 4xx || 8xx || E200
 322         default y
 323 endmenu
 324
 325 source "init/Kconfig"
 326
 327 menu "Platform support"
 328         depends on PPC64 || CLASSIC32
 329
 330 choice
 331         prompt "Machine type"
 332         default PPC_MULTIPLATFORM
 333
 334 config PPC_MULTIPLATFORM
 335         bool "Generic desktop/server/laptop"
 336         help
 337           Select this option if configuring for an IBM pSeries or
 338           RS/6000 machine, an Apple machine, or a PReP, CHRP,
 339           Maple or Cell-based machine.
 340
 341 config EMBEDDED6xx
 342         bool "Embedded 6xx/7xx/7xxx-based board"
 343         depends on PPC32 && (BROKEN||BROKEN_ON_SMP)
 344
 345 config APUS
 346         bool "Amiga-APUS"
 347         depends on PPC32 && BROKEN
 348         help
 349           Select APUS if configuring for a PowerUP Amiga.
 350           More information is available at:
 351           <http://linux-apus.sourceforge.net/>.
 352 endchoice
 353
 354 config QUICC_ENGINE
 355         bool
 356         depends on PPC_MPC836x || PPC_MPC832x
 357         default y
 358         help
 359           The QUICC Engine (QE) is a new generation of communications
 360           coprocessors on Freescale embedded CPUs (akin to CPM in older chips).
 361           Selecting this option means that you wish to build a kernel
 362           for a machine with a QE coprocessor.
 363
 364 config PPC_PSERIES
 365         depends on PPC_MULTIPLATFORM && PPC64
 366         bool "IBM pSeries & new (POWER5-based) iSeries"
 367         select MPIC
 368         select PPC_I8259
 369         select PPC_RTAS
 370         select RTAS_ERROR_LOGGING
 371         select PPC_UDBG_16550
 372         default y
 373
 374 config PPC_ISERIES
 375         bool "IBM Legacy iSeries"
 376         depends on PPC_MULTIPLATFORM && PPC64
 377
 378 config PPC_CHRP
 379         bool "Common Hardware Reference Platform (CHRP) based machines"
 380         depends on PPC_MULTIPLATFORM && PPC32
 381         select MPIC
 382         select PPC_I8259
 383         select PPC_INDIRECT_PCI
 384         select PPC_RTAS
 385         select PPC_MPC106
 386         select PPC_UDBG_16550
 387         default y
 388
 389 config PPC_PMAC
 390         bool "Apple PowerMac based machines"
 391         depends on PPC_MULTIPLATFORM
 392         select MPIC
 393         select PPC_INDIRECT_PCI if PPC32
 394         select PPC_MPC106 if PPC32
 395         default y
 396
 397 config PPC_PMAC64
 398         bool
 399         depends on PPC_PMAC && POWER4
 400         select MPIC
 401         select U3_DART
 402         select MPIC_BROKEN_U3
 403         select GENERIC_TBSYNC
 404         select PPC_970_NAP
 405         default y
 406
 407 config PPC_PREP
 408         bool "PowerPC Reference Platform (PReP) based machines"
 409         depends on PPC_MULTIPLATFORM && PPC32 && BROKEN
 410         select MPIC
 411         select PPC_I8259
 412         select PPC_INDIRECT_PCI
 413         select PPC_UDBG_16550
 414         default y
 415
 416 config PPC_MAPLE
 417         depends on PPC_MULTIPLATFORM && PPC64
 418         bool "Maple 970FX Evaluation Board"
 419         select MPIC
 420         select U3_DART
 421         select MPIC_BROKEN_U3
 422         select GENERIC_TBSYNC
 423         select PPC_UDBG_16550
 424         select PPC_970_NAP
 425         default n
 426         help
 427           This option enables support for the Maple 970FX Evaluation Board.
 428           For more information, refer to <http://www.970eval.com>
 429
 430 config PPC_PASEMI
 431         depends on PPC_MULTIPLATFORM && PPC64
 432         bool "PA Semi SoC-based platforms"
 433         default n
 434         select MPIC
 435         select PPC_UDBG_16550
 436         select GENERIC_TBSYNC
 437         help
 438           This option enables support for PA Semi's PWRficient line
 439           of SoC processors, including PA6T-1682M
 440
 441 config PPC_CELL
 442         bool
 443         default n
 444
 445 config PPC_CELL_NATIVE
 446         bool
 447         select PPC_CELL
 448         default n
 449
 450 config PPC_IBM_CELL_BLADE
 451         bool "IBM Cell Blade"
 452         depends on PPC_MULTIPLATFORM && PPC64
 453         select PPC_CELL_NATIVE
 454         select PPC_RTAS
 455         select MMIO_NVRAM
 456         select PPC_UDBG_16550
 457         select UDBG_RTAS_CONSOLE
 458
 459 config UDBG_RTAS_CONSOLE
 460         bool "RTAS based debug console"
 461         depends on PPC_RTAS
 462         default n
 463
 464 config XICS
 465         depends on PPC_PSERIES
 466         bool
 467         default y
 468
 469 config U3_DART
 470         bool
 471         depends on PPC_MULTIPLATFORM && PPC64
 472         default n
 473
 474 config PPC_RTAS
 475         bool
 476         default n
 477
 478 config RTAS_ERROR_LOGGING
 479         bool
 480         depends on PPC_RTAS
 481         default n
 482
 483 config RTAS_PROC
 484         bool "Proc interface to RTAS"
 485         depends on PPC_RTAS
 486         default y
 487
 488 config RTAS_FLASH
 489         tristate "Firmware flash interface"
 490         depends on PPC64 && RTAS_PROC
 491
 492 config MMIO_NVRAM
 493         bool
 494         default n
 495
 496 config MPIC_BROKEN_U3
 497         bool
 498         depends on PPC_MAPLE
 499         default y
 500
 501 config IBMVIO
 502         depends on PPC_PSERIES || PPC_ISERIES
 503         bool
 504         default y
 505
 506 config IBMEBUS
 507         depends on PPC_PSERIES
 508         bool "Support for GX bus based adapters"
 509         help
 510           Bus device driver for GX bus based adapters.
 511
 512 config PPC_MPC106
 513         bool
 514         default n
 515
 516 config PPC_970_NAP
 517         bool
 518         default n
 519
 520 source "drivers/cpufreq/Kconfig"
 521
 522 config CPU_FREQ_PMAC
 523         bool "Support for Apple PowerBooks"
 524         depends on CPU_FREQ && ADB_PMU && PPC32
 525         select CPU_FREQ_TABLE
 526         help
 527           This adds support for frequency switching on Apple PowerBooks,
 528           this currently includes some models of iBook & Titanium
 529           PowerBook.
 530
 531 config CPU_FREQ_PMAC64
 532         bool "Support for some Apple G5s"
 533         depends on CPU_FREQ && PPC64
 534         select CPU_FREQ_TABLE
 535         help
 536           This adds support for frequency switching on Apple iMac G5,
 537           and some of the more recent desktop G5 machines as well.
 538
 539 config PPC601_SYNC_FIX
 540         bool "Workarounds for PPC601 bugs"
 541         depends on 6xx && (PPC_PREP || PPC_PMAC)
 542         help
 543           Some versions of the PPC601 (the first PowerPC chip) have bugs which
 544           mean that extra synchronization instructions are required near
 545           certain instructions, typically those that make major changes to the
 546           CPU state.  These extra instructions reduce performance slightly.
 547           If you say N here, these extra instructions will not be included,
 548           resulting in a kernel which will run faster but may not run at all
 549           on some systems with the PPC601 chip.
 550
 551           If in doubt, say Y here.
 552
 553 config TAU
 554         bool "On-chip CPU temperature sensor support"
 555         depends on 6xx
 556         help
 557           G3 and G4 processors have an on-chip temperature sensor called the
 558           'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
 559           temperature within 2-4 degrees Celsius. This option shows the current
 560           on-die temperature in /proc/cpuinfo if the cpu supports it.
 561
 562           Unfortunately, on some chip revisions, this sensor is very inaccurate
 563           and in many cases, does not work at all, so don't assume the cpu
 564           temp is actually what /proc/cpuinfo says it is.
 565
 566 config TAU_INT
 567         bool "Interrupt driven TAU driver (DANGEROUS)"
 568         depends on TAU
 569         ---help---
 570           The TAU supports an interrupt driven mode which causes an interrupt
 571           whenever the temperature goes out of range. This is the fastest way
 572           to get notified the temp has exceeded a range. With this option off,
 573           a timer is used to re-check the temperature periodically.
 574
 575           However, on some cpus it appears that the TAU interrupt hardware
 576           is buggy and can cause a situation which would lead unexplained hard
 577           lockups.
 578
 579           Unless you are extending the TAU driver, or enjoy kernel/hardware
 580           debugging, leave this option off.
 581
 582 config TAU_AVERAGE
 583         bool "Average high and low temp"
 584         depends on TAU
 585         ---help---
 586           The TAU hardware can compare the temperature to an upper and lower
 587           bound.  The default behavior is to show both the upper and lower
 588           bound in /proc/cpuinfo. If the range is large, the temperature is
 589           either changing a lot, or the TAU hardware is broken (likely on some
 590           G4's). If the range is small (around 4 degrees), the temperature is
 591           relatively stable.  If you say Y here, a single temperature value,
 592           halfway between the upper and lower bounds, will be reported in
 593           /proc/cpuinfo.
 594
 595           If in doubt, say N here.
 596
 597 config PPC_TODC
 598         depends on EMBEDDED6xx
 599         bool "Generic Time-of-day Clock (TODC) support"
 600         ---help---
 601           This adds support for many TODC/RTC chips.
 602
 603 endmenu
 604
 605 source arch/powerpc/platforms/embedded6xx/Kconfig
 606 source arch/powerpc/platforms/4xx/Kconfig
 607 source arch/powerpc/platforms/82xx/Kconfig
 608 source arch/powerpc/platforms/83xx/Kconfig
 609 source arch/powerpc/platforms/85xx/Kconfig
 610 source arch/powerpc/platforms/86xx/Kconfig
 611 source arch/powerpc/platforms/8xx/Kconfig
 612 source arch/powerpc/platforms/cell/Kconfig
 613
 614 menu "Kernel options"
 615
 616 config HIGHMEM
 617         bool "High memory support"
 618         depends on PPC32
 619
 620 source kernel/Kconfig.hz
 621 source kernel/Kconfig.preempt
 622 source "fs/Kconfig.binfmt"
 623
 624 # We optimistically allocate largepages from the VM, so make the limit
 625 # large enough (16MB). This badly named config option is actually
 626 # max order + 1
 627 config FORCE_MAX_ZONEORDER
 628         int
 629         depends on PPC64
 630         default "9" if PPC_64K_PAGES
 631         default "13"
 632
 633 config MATH_EMULATION
 634         bool "Math emulation"
 635         depends on 4xx || 8xx || E200 || E500
 636         ---help---
 637           Some PowerPC chips designed for embedded applications do not have
 638           a floating-point unit and therefore do not implement the
 639           floating-point instructions in the PowerPC instruction set.  If you
 640           say Y here, the kernel will include code to emulate a floating-point
 641           unit, which will allow programs that use floating-point
 642           instructions to run.
 643
 644 config IOMMU_VMERGE
 645         bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
 646         depends on EXPERIMENTAL && PPC64
 647         default n
 648         help
 649           Cause IO segments sent to a device for DMA to be merged virtually
 650           by the IOMMU when they happen to have been allocated contiguously.
 651           This doesn't add pressure to the IOMMU allocator. However, some
 652           drivers don't support getting large merged segments coming back
 653           from *_map_sg(). Say Y if you know the drivers you are using are
 654           properly handling this case.
 655
 656 config HOTPLUG_CPU
 657         bool "Support for enabling/disabling CPUs"
 658         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 659         ---help---
 660           Say Y here to be able to disable and re-enable individual
 661           CPUs at runtime on SMP machines.
 662
 663           Say N if you are unsure.
 664
 665 config ARCH_ENABLE_MEMORY_HOTPLUG
 666         def_bool y
 667
 668 config KEXEC
 669         bool "kexec system call (EXPERIMENTAL)"
 670         depends on PPC_MULTIPLATFORM && EXPERIMENTAL
 671         help
 672           kexec is a system call that implements the ability to shutdown your
 673           current kernel, and to start another kernel.  It is like a reboot
 674           but it is independent of the system firmware.   And like a reboot
 675           you can start any kernel with it, not just Linux.
 676
 677           The name comes from the similarity to the exec system call.
 678
 679           It is an ongoing process to be certain the hardware in a machine
 680           is properly shutdown, so do not be surprised if this code does not
 681           initially work for you.  It may help to enable device hotplugging
 682           support.  As of this writing the exact hardware interface is
 683           strongly in flux, so no good recommendation can be made.
 684
 685 config CRASH_DUMP
 686         bool "Build a kdump crash kernel (EXPERIMENTAL)"
 687         depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
 688         help
 689           Build a kernel suitable for use as a kdump capture kernel.
 690           The kernel will be linked at a different address than normal, and
 691           so can only be used for Kdump.
 692
 693           Don't change this unless you know what you are doing.
 694
 695 config EMBEDDEDBOOT
 696         bool
 697         depends on 8xx || 8260
 698         default y
 699
 700 config PC_KEYBOARD
 701         bool "PC PS/2 style Keyboard"
 702         depends on 4xx || CPM2
 703
 704 config PPCBUG_NVRAM
 705         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 706         default y if PPC_PREP
 707
 708 config IRQ_ALL_CPUS
 709         bool "Distribute interrupts on all CPUs by default"
 710         depends on SMP && !MV64360
 711         help
 712           This option gives the kernel permission to distribute IRQs across
 713           multiple CPUs.  Saying N here will route all IRQs to the first
 714           CPU.  Generally saying Y is safe, although some problems have been
 715           reported with SMP Power Macintoshes with this option enabled.
 716
 717 source "arch/powerpc/platforms/pseries/Kconfig"
 718
 719 config NUMA
 720         bool "NUMA support"
 721         depends on PPC64
 722         default y if SMP && PPC_PSERIES
 723
 724 config NODES_SHIFT
 725         int
 726         default "4"
 727         depends on NEED_MULTIPLE_NODES
 728
 729 config ARCH_SELECT_MEMORY_MODEL
 730         def_bool y
 731         depends on PPC64
 732
 733 config ARCH_FLATMEM_ENABLE
 734         def_bool y
 735         depends on (PPC64 && !NUMA) || PPC32
 736
 737 config ARCH_SPARSEMEM_ENABLE
 738         def_bool y
 739         depends on PPC64
 740
 741 config ARCH_SPARSEMEM_DEFAULT
 742         def_bool y
 743         depends on (SMP && PPC_PSERIES) || PPC_CELL
 744
 745 config ARCH_POPULATES_NODE_MAP
 746         def_bool y
 747
 748 source "mm/Kconfig"
 749
 750 config ARCH_MEMORY_PROBE
 751         def_bool y
 752         depends on MEMORY_HOTPLUG
 753
 754 # Some NUMA nodes have memory ranges that span
 755 # other nodes.  Even though a pfn is valid and
 756 # between a node's start and end pfns, it may not
 757 # reside on that node.  See memmap_init_zone()
 758 # for details.
 759 config NODES_SPAN_OTHER_NODES
 760         def_bool y
 761         depends on NEED_MULTIPLE_NODES
 762
 763 config PPC_64K_PAGES
 764         bool "64k page size"
 765         depends on PPC64
 766         help
 767           This option changes the kernel logical page size to 64k. On machines
 768           without processor support for 64k pages, the kernel will simulate
 769           them by loading each individual 4k page on demand transparently,
 770           while on hardware with such support, it will be used to map
 771           normal application pages.
 772
 773 config SCHED_SMT
 774         bool "SMT (Hyperthreading) scheduler support"
 775         depends on PPC64 && SMP
 776         help
 777           SMT scheduler support improves the CPU scheduler's decision making
 778           when dealing with POWER5 cpus at a cost of slightly increased
 779           overhead in some places. If unsure say N here.
 780
 781 config PROC_DEVICETREE
 782         bool "Support for device tree in /proc"
 783         depends on PROC_FS
 784         help
 785           This option adds a device-tree directory under /proc which contains
 786           an image of the device tree that the kernel copies from Open
 787           Firmware or other boot firmware. If unsure, say Y here.
 788
 789 source "arch/powerpc/platforms/prep/Kconfig"
 790
 791 config CMDLINE_BOOL
 792         bool "Default bootloader kernel arguments"
 793         depends on !PPC_ISERIES
 794
 795 config CMDLINE
 796         string "Initial kernel command string"
 797         depends on CMDLINE_BOOL
 798         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 799         help
 800           On some platforms, there is currently no way for the boot loader to
 801           pass arguments to the kernel. For these platforms, you can supply
 802           some command-line options at build time by entering them here.  In
 803           most cases you will need to specify the root device here.
 804
 805 if !44x || BROKEN
 806 source kernel/power/Kconfig
 807 endif
 808
 809 config SECCOMP
 810         bool "Enable seccomp to safely compute untrusted bytecode"
 811         depends on PROC_FS
 812         default y
 813         help
 814           This kernel feature is useful for number crunching applications
 815           that may need to compute untrusted bytecode during their
 816           execution. By using pipes or other transports made available to
 817           the process as file descriptors supporting the read/write
 818           syscalls, it's possible to isolate those applications in
 819           their own address space using seccomp. Once seccomp is
 820           enabled via /proc/<pid>/seccomp, it cannot be disabled
 821           and the task is only allowed to execute a few safe syscalls
 822           defined by each seccomp mode.
 823
 824           If unsure, say Y. Only embedded should say N here.
 825
 826 endmenu
 827
 828 config ISA_DMA_API
 829         bool
 830         default y
 831
 832 menu "Bus options"
 833
 834 config ISA
 835         bool "Support for ISA-bus hardware"
 836         depends on PPC_PREP || PPC_CHRP
 837         select PPC_I8259
 838         help
 839           Find out whether you have ISA slots on your motherboard.  ISA is the
 840           name of a bus system, i.e. the way the CPU talks to the other stuff
 841           inside your box.  If you have an Apple machine, say N here; if you
 842           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 843           you have an embedded board, consult your board documentation.
 844
 845 config GENERIC_ISA_DMA
 846         bool
 847         depends on PPC64 || POWER4 || 6xx && !CPM2
 848         default y
 849
 850 config MPIC
 851         bool
 852         default n
 853
 854 config MPIC_WEIRD
 855         bool
 856         default n
 857
 858 config PPC_I8259
 859         bool
 860         default n
 861
 862 config PPC_INDIRECT_PCI
 863         bool
 864         depends on PCI
 865         default y if 40x || 44x
 866         default n
 867
 868 config EISA
 869         bool
 870
 871 config SBUS
 872         bool
 873
 874 config FSL_SOC
 875         bool
 876
 877 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 878 config MCA
 879         bool
 880
 881 config PCI
 882         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 883                 || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) || MPC7448HPC2
 884         default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
 885                 && !PPC_85xx && !PPC_86xx
 886         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
 887         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 888         help
 889           Find out whether your system includes a PCI bus. PCI is the name of
 890           a bus system, i.e. the way the CPU talks to the other stuff inside
 891           your box.  If you say Y here, the kernel will include drivers and
 892           infrastructure code to support PCI bus devices.
 893
 894 config PCI_DOMAINS
 895         bool
 896         default PCI
 897
 898 config PCI_QSPAN
 899         bool "QSpan PCI"
 900         depends on !4xx && !CPM2 && 8xx
 901         select PPC_I8259
 902         help
 903           Say Y here if you have a system based on a Motorola 8xx-series
 904           embedded processor with a QSPAN PCI interface, otherwise say N.
 905
 906 config PCI_8260
 907         bool
 908         depends on PCI && 8260
 909         select PPC_INDIRECT_PCI
 910         default y
 911
 912 config 8260_PCI9
 913         bool "Enable workaround for MPC826x erratum PCI 9"
 914         depends on PCI_8260 && !ADS8272
 915         default y
 916
 917 choice
 918         prompt "IDMA channel for PCI 9 workaround"
 919         depends on 8260_PCI9
 920
 921 config 8260_PCI9_IDMA1
 922         bool "IDMA1"
 923
 924 config 8260_PCI9_IDMA2
 925         bool "IDMA2"
 926
 927 config 8260_PCI9_IDMA3
 928         bool "IDMA3"
 929
 930 config 8260_PCI9_IDMA4
 931         bool "IDMA4"
 932
 933 endchoice
 934
 935 source "drivers/pci/pcie/Kconfig"
 936
 937 source "drivers/pci/Kconfig"
 938
 939 source "drivers/pcmcia/Kconfig"
 940
 941 source "drivers/pci/hotplug/Kconfig"
 942
 943 endmenu
 944
 945 menu "Advanced setup"
 946         depends on PPC32
 947
 948 config ADVANCED_OPTIONS
 949         bool "Prompt for advanced kernel configuration options"
 950         help
 951           This option will enable prompting for a variety of advanced kernel
 952           configuration options.  These options can cause the kernel to not
 953           work if they are set incorrectly, but can be used to optimize certain
 954           aspects of kernel memory management.
 955
 956           Unless you know what you are doing, say N here.
 957
 958 comment "Default settings for advanced configuration options are used"
 959         depends on !ADVANCED_OPTIONS
 960
 961 config HIGHMEM_START_BOOL
 962         bool "Set high memory pool address"
 963         depends on ADVANCED_OPTIONS && HIGHMEM
 964         help
 965           This option allows you to set the base address of the kernel virtual
 966           area used to map high memory pages.  This can be useful in
 967           optimizing the layout of kernel virtual memory.
 968
 969           Say N here unless you know what you are doing.
 970
 971 config HIGHMEM_START
 972         hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
 973         default "0xfe000000"
 974
 975 config LOWMEM_SIZE_BOOL
 976         bool "Set maximum low memory"
 977         depends on ADVANCED_OPTIONS
 978         help
 979           This option allows you to set the maximum amount of memory which
 980           will be used as "low memory", that is, memory which the kernel can
 981           access directly, without having to set up a kernel virtual mapping.
 982           This can be useful in optimizing the layout of kernel virtual
 983           memory.
 984
 985           Say N here unless you know what you are doing.
 986
 987 config LOWMEM_SIZE
 988         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 989         default "0x30000000"
 990
 991 config KERNEL_START_BOOL
 992         bool "Set custom kernel base address"
 993         depends on ADVANCED_OPTIONS
 994         help
 995           This option allows you to set the kernel virtual address at which
 996           the kernel will map low memory (the kernel image will be linked at
 997           this address).  This can be useful in optimizing the virtual memory
 998           layout of the system.
 999
1000           Say N here unless you know what you are doing.
1001
1002 config KERNEL_START
1003         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1004         default "0xc0000000"
1005
1006 config TASK_SIZE_BOOL
1007         bool "Set custom user task size"
1008         depends on ADVANCED_OPTIONS
1009         help
1010           This option allows you to set the amount of virtual address space
1011           allocated to user tasks.  This can be useful in optimizing the
1012           virtual memory layout of the system.
1013
1014           Say N here unless you know what you are doing.
1015
1016 config TASK_SIZE
1017         hex "Size of user task space" if TASK_SIZE_BOOL
1018         default "0x80000000"
1019
1020 config CONSISTENT_START_BOOL
1021         bool "Set custom consistent memory pool address"
1022         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1023         help
1024           This option allows you to set the base virtual address
1025           of the consistent memory pool.  This pool of virtual
1026           memory is used to make consistent memory allocations.
1027
1028 config CONSISTENT_START
1029         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
1030         default "0xff100000" if NOT_COHERENT_CACHE
1031
1032 config CONSISTENT_SIZE_BOOL
1033         bool "Set custom consistent memory pool size"
1034         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1035         help
1036           This option allows you to set the size of the
1037           consistent memory pool.  This pool of virtual memory
1038           is used to make consistent memory allocations.
1039
1040 config CONSISTENT_SIZE
1041         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1042         default "0x00200000" if NOT_COHERENT_CACHE
1043
1044 config BOOT_LOAD_BOOL
1045         bool "Set the boot link/load address"
1046         depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
1047         help
1048           This option allows you to set the initial load address of the zImage
1049           or zImage.initrd file.  This can be useful if you are on a board
1050           which has a small amount of memory.
1051
1052           Say N here unless you know what you are doing.
1053
1054 config BOOT_LOAD
1055         hex "Link/load address for booting" if BOOT_LOAD_BOOL
1056         default "0x00400000" if 40x || 8xx || 8260
1057         default "0x01000000" if 44x
1058         default "0x00800000"
1059
1060 config PIN_TLB
1061         bool "Pinned Kernel TLBs (860 ONLY)"
1062         depends on ADVANCED_OPTIONS && 8xx
1063 endmenu
1064
1065 if PPC64
1066 config KERNEL_START
1067         hex
1068         default "0xc000000000000000"
1069 endif
1070
1071 source "net/Kconfig"
1072
1073 source "drivers/Kconfig"
1074
1075 source "fs/Kconfig"
1076
1077 # XXX source "arch/ppc/8xx_io/Kconfig"
1078
1079 # XXX source "arch/ppc/8260_io/Kconfig"
1080
1081 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1082
1083 source "arch/powerpc/platforms/iseries/Kconfig"
1084
1085 source "lib/Kconfig"
1086
1087 menu "Instrumentation Support"
1088         depends on EXPERIMENTAL
1089
1090 source "arch/powerpc/oprofile/Kconfig"
1091
1092 config KPROBES
1093         bool "Kprobes (EXPERIMENTAL)"
1094         depends on PPC64 && KALLSYMS && EXPERIMENTAL && MODULES
1095         help
1096           Kprobes allows you to trap at almost any kernel address and
1097           execute a callback function.  register_kprobe() establishes
1098           a probepoint and specifies the callback.  Kprobes is useful
1099           for kernel debugging, non-intrusive instrumentation and testing.
1100           If in doubt, say "N".
1101 endmenu
1102
1103 source "arch/powerpc/Kconfig.debug"
1104
1105 source "security/Kconfig"
1106
1107 config KEYS_COMPAT
1108         bool
1109         depends on COMPAT && KEYS
1110         default y
1111
1112 source "crypto/Kconfig"