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 source "arch/powerpc/platforms/Kconfig.cputype"
   8
   9 config PPC32
  10         bool
  11         default y if !PPC64
  12
  13 config 64BIT
  14         bool
  15         default y if PPC64
  16
  17 config WORD_SIZE
  18         int
  19         default 64 if PPC64
  20         default 32 if !PPC64
  21
  22 config PPC_MERGE
  23         def_bool y
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config GENERIC_CMOS_UPDATE
  30         def_bool y
  31
  32 config GENERIC_TIME
  33         def_bool y
  34
  35 config GENERIC_TIME_VSYSCALL
  36         def_bool y
  37
  38 config GENERIC_CLOCKEVENTS
  39         def_bool y
  40
  41 config GENERIC_HARDIRQS
  42         bool
  43         default y
  44
  45 config HAVE_SETUP_PER_CPU_AREA
  46         def_bool PPC64
  47
  48 config IRQ_PER_CPU
  49         bool
  50         default y
  51
  52 config STACKTRACE_SUPPORT
  53         bool
  54         default y
  55
  56 config HAVE_LATENCYTOP_SUPPORT
  57         def_bool y
  58
  59 config TRACE_IRQFLAGS_SUPPORT
  60         bool
  61         depends on PPC64
  62         default y
  63
  64 config LOCKDEP_SUPPORT
  65         bool
  66         default y
  67
  68 config RWSEM_GENERIC_SPINLOCK
  69         bool
  70
  71 config RWSEM_XCHGADD_ALGORITHM
  72         bool
  73         default y
  74
  75 config GENERIC_LOCKBREAK
  76         bool
  77         default y
  78         depends on SMP && PREEMPT
  79
  80 config ARCH_HAS_ILOG2_U32
  81         bool
  82         default y
  83
  84 config ARCH_HAS_ILOG2_U64
  85         bool
  86         default y if 64BIT
  87
  88 config GENERIC_HWEIGHT
  89         bool
  90         default y
  91
  92 config GENERIC_CALIBRATE_DELAY
  93         bool
  94         default y
  95
  96 config GENERIC_FIND_NEXT_BIT
  97         bool
  98         default y
  99
 100 config GENERIC_GPIO
 101         bool
 102         help
 103           Generic GPIO API support
 104
 105 config ARCH_NO_VIRT_TO_BUS
 106         def_bool PPC64
 107
 108 config PPC
 109         bool
 110         default y
 111         select HAVE_DYNAMIC_FTRACE
 112         select HAVE_FTRACE
 113         select ARCH_WANT_OPTIONAL_GPIOLIB
 114         select HAVE_IDE
 115         select HAVE_IOREMAP_PROT
 116         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 117         select HAVE_KPROBES
 118         select HAVE_ARCH_KGDB
 119         select HAVE_KRETPROBES
 120         select HAVE_LMB
 121         select HAVE_DMA_ATTRS if PPC64
 122         select USE_GENERIC_SMP_HELPERS if SMP
 123         select HAVE_OPROFILE
 124
 125 config EARLY_PRINTK
 126         bool
 127         default y
 128
 129 config COMPAT
 130         bool
 131         default y if PPC64
 132         select COMPAT_BINFMT_ELF
 133
 134 config SYSVIPC_COMPAT
 135         bool
 136         depends on COMPAT && SYSVIPC
 137         default y
 138
 139 # All PPC32s use generic nvram driver through ppc_md
 140 config GENERIC_NVRAM
 141         bool
 142         default y if PPC32
 143
 144 config SCHED_NO_NO_OMIT_FRAME_POINTER
 145         bool
 146         default y
 147
 148 config ARCH_MAY_HAVE_PC_FDC
 149         bool
 150         default !PPC_PSERIES || PCI
 151
 152 config PPC_OF
 153         def_bool y
 154
 155 config OF
 156         def_bool y
 157
 158 config PPC_UDBG_16550
 159         bool
 160         default n
 161
 162 config GENERIC_TBSYNC
 163         bool
 164         default y if PPC32 && SMP
 165         default n
 166
 167 config AUDIT_ARCH
 168         bool
 169         default y
 170
 171 config GENERIC_BUG
 172         bool
 173         default y
 174         depends on BUG
 175
 176 config SYS_SUPPORTS_APM_EMULATION
 177         default y if PMAC_APM_EMU
 178         bool
 179
 180 config DEFAULT_UIMAGE
 181         bool
 182         help
 183           Used to allow a board to specify it wants a uImage built by default
 184         default n
 185
 186 config REDBOOT
 187         bool
 188
 189 config HIBERNATE_32
 190         bool
 191         depends on (PPC_PMAC && !SMP) || BROKEN
 192         default y
 193
 194 config HIBERNATE_64
 195         bool
 196         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 197         default y
 198
 199 config ARCH_HIBERNATION_POSSIBLE
 200         bool
 201         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 202         default y
 203
 204 config ARCH_SUSPEND_POSSIBLE
 205         def_bool y
 206         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
 207
 208 config PPC_DCR_NATIVE
 209         bool
 210         default n
 211
 212 config PPC_DCR_MMIO
 213         bool
 214         default n
 215
 216 config PPC_DCR
 217         bool
 218         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 219         default y
 220
 221 config PPC_OF_PLATFORM_PCI
 222         bool
 223         depends on PCI
 224         depends on PPC64 # not supported on 32 bits yet
 225         default n
 226
 227 source "init/Kconfig"
 228
 229 source "arch/powerpc/sysdev/Kconfig"
 230 source "arch/powerpc/platforms/Kconfig"
 231
 232 menu "Kernel options"
 233
 234 config HIGHMEM
 235         bool "High memory support"
 236         depends on PPC32
 237
 238 source kernel/time/Kconfig
 239 source kernel/Kconfig.hz
 240 source kernel/Kconfig.preempt
 241 source "fs/Kconfig.binfmt"
 242
 243 config HUGETLB_PAGE_SIZE_VARIABLE
 244         bool
 245         depends on HUGETLB_PAGE
 246         default y
 247
 248 config MATH_EMULATION
 249         bool "Math emulation"
 250         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 251         ---help---
 252           Some PowerPC chips designed for embedded applications do not have
 253           a floating-point unit and therefore do not implement the
 254           floating-point instructions in the PowerPC instruction set.  If you
 255           say Y here, the kernel will include code to emulate a floating-point
 256           unit, which will allow programs that use floating-point
 257           instructions to run.
 258
 259 config 8XX_MINIMAL_FPEMU
 260         bool "Minimal math emulation for 8xx"
 261         depends on 8xx && !MATH_EMULATION
 262         help
 263           Older arch/ppc kernels still emulated a few floating point
 264           instructions such as load and store, even when full math
 265           emulation is disabled.  Say "Y" here if you want to preserve
 266           this behavior.
 267
 268           It is recommended that you build a soft-float userspace instead.
 269
 270 config IOMMU_VMERGE
 271         bool "Enable IOMMU virtual merging"
 272         depends on PPC64
 273         default y
 274         help
 275           Cause IO segments sent to a device for DMA to be merged virtually
 276           by the IOMMU when they happen to have been allocated contiguously.
 277           This doesn't add pressure to the IOMMU allocator. However, some
 278           drivers don't support getting large merged segments coming back
 279           from *_map_sg().
 280
 281           Most drivers don't have this problem; it is safe to say Y here.
 282
 283 config IOMMU_HELPER
 284         def_bool PPC64
 285
 286 config HOTPLUG_CPU
 287         bool "Support for enabling/disabling CPUs"
 288         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 289         ---help---
 290           Say Y here to be able to disable and re-enable individual
 291           CPUs at runtime on SMP machines.
 292
 293           Say N if you are unsure.
 294
 295 config ARCH_ENABLE_MEMORY_HOTPLUG
 296         def_bool y
 297
 298 config ARCH_HAS_WALK_MEMORY
 299         def_bool y
 300
 301 config ARCH_ENABLE_MEMORY_HOTREMOVE
 302         def_bool y
 303
 304 config KEXEC
 305         bool "kexec system call (EXPERIMENTAL)"
 306         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 307         help
 308           kexec is a system call that implements the ability to shutdown your
 309           current kernel, and to start another kernel.  It is like a reboot
 310           but it is independent of the system firmware.   And like a reboot
 311           you can start any kernel with it, not just Linux.
 312
 313           The name comes from the similarity to the exec system call.
 314
 315           It is an ongoing process to be certain the hardware in a machine
 316           is properly shutdown, so do not be surprised if this code does not
 317           initially work for you.  It may help to enable device hotplugging
 318           support.  As of this writing the exact hardware interface is
 319           strongly in flux, so no good recommendation can be made.
 320
 321 config CRASH_DUMP
 322         bool "Build a kdump crash kernel"
 323         depends on PPC_MULTIPLATFORM && PPC64
 324         help
 325           Build a kernel suitable for use as a kdump capture kernel.
 326           The kernel will be linked at a different address than normal, and
 327           so can only be used for Kdump.
 328
 329           Don't change this unless you know what you are doing.
 330
 331 config PHYP_DUMP
 332         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 333         depends on PPC_PSERIES && EXPERIMENTAL
 334         help
 335           Hypervisor-assisted dump is meant to be a kdump replacement
 336           offering robustness and speed not possible without system
 337           hypervisor assistence.
 338
 339           If unsure, say "N"
 340
 341 config PPCBUG_NVRAM
 342         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 343         default y if PPC_PREP
 344
 345 config IRQ_ALL_CPUS
 346         bool "Distribute interrupts on all CPUs by default"
 347         depends on SMP && !MV64360
 348         help
 349           This option gives the kernel permission to distribute IRQs across
 350           multiple CPUs.  Saying N here will route all IRQs to the first
 351           CPU.  Generally saying Y is safe, although some problems have been
 352           reported with SMP Power Macintoshes with this option enabled.
 353
 354 config NUMA
 355         bool "NUMA support"
 356         depends on PPC64
 357         default y if SMP && PPC_PSERIES
 358
 359 config NODES_SHIFT
 360         int
 361         default "4"
 362         depends on NEED_MULTIPLE_NODES
 363
 364 config ARCH_SELECT_MEMORY_MODEL
 365         def_bool y
 366         depends on PPC64
 367
 368 config ARCH_FLATMEM_ENABLE
 369         def_bool y
 370         depends on (PPC64 && !NUMA) || PPC32
 371
 372 config ARCH_SPARSEMEM_ENABLE
 373         def_bool y
 374         depends on PPC64
 375         select SPARSEMEM_VMEMMAP_ENABLE
 376
 377 config ARCH_SPARSEMEM_DEFAULT
 378         def_bool y
 379         depends on (SMP && PPC_PSERIES) || PPC_PS3
 380
 381 config ARCH_POPULATES_NODE_MAP
 382         def_bool y
 383
 384 source "mm/Kconfig"
 385
 386 config ARCH_MEMORY_PROBE
 387         def_bool y
 388         depends on MEMORY_HOTPLUG
 389
 390 # Some NUMA nodes have memory ranges that span
 391 # other nodes.  Even though a pfn is valid and
 392 # between a node's start and end pfns, it may not
 393 # reside on that node.  See memmap_init_zone()
 394 # for details.
 395 config NODES_SPAN_OTHER_NODES
 396         def_bool y
 397         depends on NEED_MULTIPLE_NODES
 398
 399 config PPC_HAS_HASH_64K
 400         bool
 401         depends on PPC64
 402         default n
 403
 404 config PPC_64K_PAGES
 405         bool "64k page size"
 406         depends on PPC64
 407         select PPC_HAS_HASH_64K
 408         help
 409           This option changes the kernel logical page size to 64k. On machines
 410           without processor support for 64k pages, the kernel will simulate
 411           them by loading each individual 4k page on demand transparently,
 412           while on hardware with such support, it will be used to map
 413           normal application pages.
 414
 415 config FORCE_MAX_ZONEORDER
 416         int "Maximum zone order"
 417         default "9" if PPC_64K_PAGES
 418         default "13" if PPC64 && !PPC_64K_PAGES
 419         default "11"
 420         help
 421           The kernel memory allocator divides physically contiguous memory
 422           blocks into "zones", where each zone is a power of two number of
 423           pages.  This option selects the largest power of two that the kernel
 424           keeps in the memory allocator.  If you need to allocate very large
 425           blocks of physically contiguous memory, then you may need to
 426           increase this value.
 427
 428           This config option is actually maximum order plus one. For example,
 429           a value of 11 means that the largest free memory block is 2^10 pages.
 430
 431           The page size is not necessarily 4KB.  For example, on 64-bit
 432           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 433           this in mind when choosing a value for this option.
 434
 435 config PPC_SUBPAGE_PROT
 436         bool "Support setting protections for 4k subpages"
 437         depends on PPC_64K_PAGES
 438         help
 439           This option adds support for a system call to allow user programs
 440           to set access permissions (read/write, readonly, or no access)
 441           on the 4k subpages of each 64k page.
 442
 443 config SCHED_SMT
 444         bool "SMT (Hyperthreading) scheduler support"
 445         depends on PPC64 && SMP
 446         help
 447           SMT scheduler support improves the CPU scheduler's decision making
 448           when dealing with POWER5 cpus at a cost of slightly increased
 449           overhead in some places. If unsure say N here.
 450
 451 config PROC_DEVICETREE
 452         bool "Support for device tree in /proc"
 453         depends on PROC_FS
 454         help
 455           This option adds a device-tree directory under /proc which contains
 456           an image of the device tree that the kernel copies from Open
 457           Firmware or other boot firmware. If unsure, say Y here.
 458
 459 config CMDLINE_BOOL
 460         bool "Default bootloader kernel arguments"
 461
 462 config CMDLINE
 463         string "Initial kernel command string"
 464         depends on CMDLINE_BOOL
 465         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 466         help
 467           On some platforms, there is currently no way for the boot loader to
 468           pass arguments to the kernel. For these platforms, you can supply
 469           some command-line options at build time by entering them here.  In
 470           most cases you will need to specify the root device here.
 471
 472 config EXTRA_TARGETS
 473         string "Additional default image types"
 474         help
 475           List additional targets to be built by the bootwrapper here (separated
 476           by spaces).  This is useful for targets that depend of device tree
 477           files in the .dts directory.
 478
 479           Targets in this list will be build as part of the default build
 480           target, or when the user does a 'make zImage' or a
 481           'make zImage.initrd'.
 482
 483           If unsure, leave blank
 484
 485 if !44x || BROKEN
 486 config ARCH_WANTS_FREEZER_CONTROL
 487         def_bool y
 488         depends on ADB_PMU
 489
 490 source kernel/power/Kconfig
 491 endif
 492
 493 config SECCOMP
 494         bool "Enable seccomp to safely compute untrusted bytecode"
 495         depends on PROC_FS
 496         default y
 497         help
 498           This kernel feature is useful for number crunching applications
 499           that may need to compute untrusted bytecode during their
 500           execution. By using pipes or other transports made available to
 501           the process as file descriptors supporting the read/write
 502           syscalls, it's possible to isolate those applications in
 503           their own address space using seccomp. Once seccomp is
 504           enabled via /proc/<pid>/seccomp, it cannot be disabled
 505           and the task is only allowed to execute a few safe syscalls
 506           defined by each seccomp mode.
 507
 508           If unsure, say Y. Only embedded should say N here.
 509
 510 endmenu
 511
 512 config ISA_DMA_API
 513         bool
 514         default !PPC_ISERIES || PCI
 515
 516 menu "Bus options"
 517
 518 config ISA
 519         bool "Support for ISA-bus hardware"
 520         depends on PPC_PREP || PPC_CHRP
 521         select PPC_I8259
 522         help
 523           Find out whether you have ISA slots on your motherboard.  ISA is the
 524           name of a bus system, i.e. the way the CPU talks to the other stuff
 525           inside your box.  If you have an Apple machine, say N here; if you
 526           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 527           you have an embedded board, consult your board documentation.
 528
 529 config ZONE_DMA
 530         bool
 531         default y
 532
 533 config GENERIC_ISA_DMA
 534         bool
 535         depends on PPC64 || POWER4 || 6xx && !CPM2
 536         default y
 537
 538 config PPC_INDIRECT_PCI
 539         bool
 540         depends on PCI
 541         default y if 40x || 44x
 542         default n
 543
 544 config EISA
 545         bool
 546
 547 config SBUS
 548         bool
 549
 550 config FSL_SOC
 551         bool
 552
 553 config FSL_PCI
 554         bool
 555         select PPC_INDIRECT_PCI
 556
 557 config 4xx_SOC
 558         bool
 559
 560 config FSL_LBC
 561         bool
 562         help
 563           Freescale Localbus support
 564
 565 config FSL_GTM
 566         bool
 567         depends on PPC_83xx || QUICC_ENGINE || CPM2
 568         help
 569           Freescale General-purpose Timers support
 570
 571 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 572 config MCA
 573         bool
 574
 575 # Platforms that what PCI turned unconditionally just do select PCI
 576 # in their config node.  Platforms that want to choose at config
 577 # time should select PPC_PCI_CHOICE
 578 config PPC_PCI_CHOICE
 579         bool
 580
 581 config PCI
 582         bool "PCI support" if PPC_PCI_CHOICE
 583         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 584                 && !PPC_85xx && !PPC_86xx
 585         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 586         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 587         select ARCH_SUPPORTS_MSI
 588         help
 589           Find out whether your system includes a PCI bus. PCI is the name of
 590           a bus system, i.e. the way the CPU talks to the other stuff inside
 591           your box.  If you say Y here, the kernel will include drivers and
 592           infrastructure code to support PCI bus devices.
 593
 594 config PCI_DOMAINS
 595         def_bool PCI
 596
 597 config PCI_SYSCALL
 598         def_bool PCI
 599
 600 config PCI_QSPAN
 601         bool "QSpan PCI"
 602         depends on !4xx && !CPM2 && 8xx
 603         select PPC_I8259
 604         help
 605           Say Y here if you have a system based on a Motorola 8xx-series
 606           embedded processor with a QSPAN PCI interface, otherwise say N.
 607
 608 config PCI_8260
 609         bool
 610         depends on PCI && 8260
 611         select PPC_INDIRECT_PCI
 612         default y
 613
 614 config 8260_PCI9
 615         bool "Enable workaround for MPC826x erratum PCI 9"
 616         depends on PCI_8260 && !8272
 617         default y
 618
 619 choice
 620         prompt "IDMA channel for PCI 9 workaround"
 621         depends on 8260_PCI9
 622
 623 config 8260_PCI9_IDMA1
 624         bool "IDMA1"
 625
 626 config 8260_PCI9_IDMA2
 627         bool "IDMA2"
 628
 629 config 8260_PCI9_IDMA3
 630         bool "IDMA3"
 631
 632 config 8260_PCI9_IDMA4
 633         bool "IDMA4"
 634
 635 endchoice
 636
 637 source "drivers/pci/pcie/Kconfig"
 638
 639 source "drivers/pci/Kconfig"
 640
 641 source "drivers/pcmcia/Kconfig"
 642
 643 source "drivers/pci/hotplug/Kconfig"
 644
 645 config HAS_RAPIDIO
 646         bool
 647         default n
 648
 649 config RAPIDIO
 650         bool "RapidIO support"
 651         depends on HAS_RAPIDIO
 652         help
 653           If you say Y here, the kernel will include drivers and
 654           infrastructure code to support RapidIO interconnect devices.
 655
 656 source "drivers/rapidio/Kconfig"
 657
 658 endmenu
 659
 660 menu "Advanced setup"
 661         depends on PPC32
 662
 663 config ADVANCED_OPTIONS
 664         bool "Prompt for advanced kernel configuration options"
 665         help
 666           This option will enable prompting for a variety of advanced kernel
 667           configuration options.  These options can cause the kernel to not
 668           work if they are set incorrectly, but can be used to optimize certain
 669           aspects of kernel memory management.
 670
 671           Unless you know what you are doing, say N here.
 672
 673 comment "Default settings for advanced configuration options are used"
 674         depends on !ADVANCED_OPTIONS
 675
 676 config LOWMEM_SIZE_BOOL
 677         bool "Set maximum low memory"
 678         depends on ADVANCED_OPTIONS
 679         help
 680           This option allows you to set the maximum amount of memory which
 681           will be used as "low memory", that is, memory which the kernel can
 682           access directly, without having to set up a kernel virtual mapping.
 683           This can be useful in optimizing the layout of kernel virtual
 684           memory.
 685
 686           Say N here unless you know what you are doing.
 687
 688 config LOWMEM_SIZE
 689         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 690         default "0x30000000"
 691
 692 config RELOCATABLE
 693         bool "Build a relocatable kernel (EXPERIMENTAL)"
 694         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 695         help
 696           This builds a kernel image that is capable of running at the
 697           location the kernel is loaded at (some alignment restrictions may
 698           exist).
 699
 700           One use is for the kexec on panic case where the recovery kernel
 701           must live at a different physical address than the primary
 702           kernel.
 703
 704           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 705           it has been loaded at and the compile time physical addresses
 706           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 707           setting can still be useful to bootwrappers that need to know the
 708           load location of the kernel (eg. u-boot/mkimage).
 709
 710 config PAGE_OFFSET_BOOL
 711         bool "Set custom page offset address"
 712         depends on ADVANCED_OPTIONS
 713         help
 714           This option allows you to set the kernel virtual address at which
 715           the kernel will map low memory.  This can be useful in optimizing
 716           the virtual memory layout of the system.
 717
 718           Say N here unless you know what you are doing.
 719
 720 config PAGE_OFFSET
 721         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 722         default "0xc0000000"
 723
 724 config KERNEL_START_BOOL
 725         bool "Set custom kernel base address"
 726         depends on ADVANCED_OPTIONS
 727         help
 728           This option allows you to set the kernel virtual address at which
 729           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 730           however there are times (like kdump) that one might not want them
 731           to be the same.
 732
 733           Say N here unless you know what you are doing.
 734
 735 config KERNEL_START
 736         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 737         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 738         default "0xc2000000" if CRASH_DUMP
 739         default "0xc0000000"
 740
 741 config PHYSICAL_START_BOOL
 742         bool "Set physical address where the kernel is loaded"
 743         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 744         help
 745           This gives the physical address where the kernel is loaded.
 746
 747           Say N here unless you know what you are doing.
 748
 749 config PHYSICAL_START
 750         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 751         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 752         default "0x00000000"
 753
 754 config PHYSICAL_ALIGN
 755         hex
 756         default "0x10000000" if FSL_BOOKE
 757         help
 758           This value puts the alignment restrictions on physical address
 759           where kernel is loaded and run from. Kernel is compiled for an
 760           address which meets above alignment restriction.
 761
 762 config TASK_SIZE_BOOL
 763         bool "Set custom user task size"
 764         depends on ADVANCED_OPTIONS
 765         help
 766           This option allows you to set the amount of virtual address space
 767           allocated to user tasks.  This can be useful in optimizing the
 768           virtual memory layout of the system.
 769
 770           Say N here unless you know what you are doing.
 771
 772 config TASK_SIZE
 773         hex "Size of user task space" if TASK_SIZE_BOOL
 774         default "0x80000000" if PPC_PREP || PPC_8xx
 775         default "0xc0000000"
 776
 777 config CONSISTENT_START_BOOL
 778         bool "Set custom consistent memory pool address"
 779         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 780         help
 781           This option allows you to set the base virtual address
 782           of the consistent memory pool.  This pool of virtual
 783           memory is used to make consistent memory allocations.
 784
 785 config CONSISTENT_START
 786         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 787         default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
 788         default "0xff100000" if NOT_COHERENT_CACHE
 789
 790 config CONSISTENT_SIZE_BOOL
 791         bool "Set custom consistent memory pool size"
 792         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 793         help
 794           This option allows you to set the size of the
 795           consistent memory pool.  This pool of virtual memory
 796           is used to make consistent memory allocations.
 797
 798 config CONSISTENT_SIZE
 799         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 800         default "0x00200000" if NOT_COHERENT_CACHE
 801
 802 config PIN_TLB
 803         bool "Pinned Kernel TLBs (860 ONLY)"
 804         depends on ADVANCED_OPTIONS && 8xx
 805 endmenu
 806
 807 if PPC64
 808 config PAGE_OFFSET
 809         hex
 810         default "0xc000000000000000"
 811 config KERNEL_START
 812         hex
 813         default "0xc000000002000000" if CRASH_DUMP
 814         default "0xc000000000000000"
 815 config PHYSICAL_START
 816         hex
 817         default "0x02000000" if CRASH_DUMP
 818         default "0x00000000"
 819 endif
 820
 821 source "net/Kconfig"
 822
 823 source "drivers/Kconfig"
 824
 825 source "fs/Kconfig"
 826
 827 # XXX source "arch/ppc/8xx_io/Kconfig"
 828
 829 # XXX source "arch/ppc/8260_io/Kconfig"
 830
 831 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 832
 833 source "lib/Kconfig"
 834
 835 source "arch/powerpc/Kconfig.debug"
 836
 837 source "security/Kconfig"
 838
 839 config KEYS_COMPAT
 840         bool
 841         depends on COMPAT && KEYS
 842         default y
 843
 844 source "crypto/Kconfig"
 845
 846 config PPC_CLOCK
 847         bool
 848         default n
 849         select HAVE_CLK
 850
 851 config PPC_LIB_RHEAP
 852         bool
 853
 854 source "arch/powerpc/kvm/Kconfig"