arch/powerpc/Kconfig

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