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