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 HAVE_IDE
 114         select HAVE_KPROBES
 115         select HAVE_KRETPROBES
 116         select HAVE_LMB
 117         select HAVE_DMA_ATTRS if PPC64
 118         select HAVE_OPROFILE
 119
 120 config EARLY_PRINTK
 121         bool
 122         default y
 123
 124 config COMPAT
 125         bool
 126         default y if PPC64
 127         select COMPAT_BINFMT_ELF
 128
 129 config SYSVIPC_COMPAT
 130         bool
 131         depends on COMPAT && SYSVIPC
 132         default y
 133
 134 # All PPC32s use generic nvram driver through ppc_md
 135 config GENERIC_NVRAM
 136         bool
 137         default y if PPC32
 138
 139 config SCHED_NO_NO_OMIT_FRAME_POINTER
 140         bool
 141         default y
 142
 143 config ARCH_MAY_HAVE_PC_FDC
 144         bool
 145         default !PPC_PSERIES || PCI
 146
 147 config PPC_OF
 148         def_bool y
 149
 150 config OF
 151         def_bool y
 152
 153 config PPC_UDBG_16550
 154         bool
 155         default n
 156
 157 config GENERIC_TBSYNC
 158         bool
 159         default y if PPC32 && SMP
 160         default n
 161
 162 config AUDIT_ARCH
 163         bool
 164         default y
 165
 166 config GENERIC_BUG
 167         bool
 168         default y
 169         depends on BUG
 170
 171 config SYS_SUPPORTS_APM_EMULATION
 172         default y if PMAC_APM_EMU
 173         bool
 174
 175 config DEFAULT_UIMAGE
 176         bool
 177         help
 178           Used to allow a board to specify it wants a uImage built by default
 179         default n
 180
 181 config REDBOOT
 182         bool
 183
 184 config HIBERNATE_32
 185         bool
 186         depends on (PPC_PMAC && !SMP) || BROKEN
 187         default y
 188
 189 config HIBERNATE_64
 190         bool
 191         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 192         default y
 193
 194 config ARCH_HIBERNATION_POSSIBLE
 195         bool
 196         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 197         default y
 198
 199 config ARCH_SUSPEND_POSSIBLE
 200         def_bool y
 201         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
 202
 203 config PPC_DCR_NATIVE
 204         bool
 205         default n
 206
 207 config PPC_DCR_MMIO
 208         bool
 209         default n
 210
 211 config PPC_DCR
 212         bool
 213         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 214         default y
 215
 216 config PPC_OF_PLATFORM_PCI
 217         bool
 218         depends on PCI
 219         depends on PPC64 # not supported on 32 bits yet
 220         default n
 221
 222 source "init/Kconfig"
 223
 224 source "arch/powerpc/sysdev/Kconfig"
 225 source "arch/powerpc/platforms/Kconfig"
 226
 227 menu "Kernel options"
 228
 229 config HIGHMEM
 230         bool "High memory support"
 231         depends on PPC32
 232
 233 source kernel/time/Kconfig
 234 source kernel/Kconfig.hz
 235 source kernel/Kconfig.preempt
 236 source "fs/Kconfig.binfmt"
 237
 238 config HUGETLB_PAGE_SIZE_VARIABLE
 239         bool
 240         depends on HUGETLB_PAGE
 241         default y
 242
 243 config MATH_EMULATION
 244         bool "Math emulation"
 245         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 246         ---help---
 247           Some PowerPC chips designed for embedded applications do not have
 248           a floating-point unit and therefore do not implement the
 249           floating-point instructions in the PowerPC instruction set.  If you
 250           say Y here, the kernel will include code to emulate a floating-point
 251           unit, which will allow programs that use floating-point
 252           instructions to run.
 253
 254 config 8XX_MINIMAL_FPEMU
 255         bool "Minimal math emulation for 8xx"
 256         depends on 8xx && !MATH_EMULATION
 257         help
 258           Older arch/ppc kernels still emulated a few floating point
 259           instructions such as load and store, even when full math
 260           emulation is disabled.  Say "Y" here if you want to preserve
 261           this behavior.
 262
 263           It is recommended that you build a soft-float userspace instead.
 264
 265 config IOMMU_VMERGE
 266         bool "Enable IOMMU virtual merging"
 267         depends on PPC64
 268         default y
 269         help
 270           Cause IO segments sent to a device for DMA to be merged virtually
 271           by the IOMMU when they happen to have been allocated contiguously.
 272           This doesn't add pressure to the IOMMU allocator. However, some
 273           drivers don't support getting large merged segments coming back
 274           from *_map_sg().
 275
 276           Most drivers don't have this problem; it is safe to say Y here.
 277
 278 config IOMMU_HELPER
 279         def_bool PPC64
 280
 281 config HOTPLUG_CPU
 282         bool "Support for enabling/disabling CPUs"
 283         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 284         ---help---
 285           Say Y here to be able to disable and re-enable individual
 286           CPUs at runtime on SMP machines.
 287
 288           Say N if you are unsure.
 289
 290 config ARCH_ENABLE_MEMORY_HOTPLUG
 291         def_bool y
 292
 293 config ARCH_HAS_WALK_MEMORY
 294         def_bool y
 295
 296 config ARCH_ENABLE_MEMORY_HOTREMOVE
 297         def_bool y
 298
 299 config KEXEC
 300         bool "kexec system call (EXPERIMENTAL)"
 301         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 302         help
 303           kexec is a system call that implements the ability to shutdown your
 304           current kernel, and to start another kernel.  It is like a reboot
 305           but it is independent of the system firmware.   And like a reboot
 306           you can start any kernel with it, not just Linux.
 307
 308           The name comes from the similarity to the exec system call.
 309
 310           It is an ongoing process to be certain the hardware in a machine
 311           is properly shutdown, so do not be surprised if this code does not
 312           initially work for you.  It may help to enable device hotplugging
 313           support.  As of this writing the exact hardware interface is
 314           strongly in flux, so no good recommendation can be made.
 315
 316 config CRASH_DUMP
 317         bool "Build a kdump crash kernel"
 318         depends on PPC_MULTIPLATFORM && PPC64
 319         help
 320           Build a kernel suitable for use as a kdump capture kernel.
 321           The kernel will be linked at a different address than normal, and
 322           so can only be used for Kdump.
 323
 324           Don't change this unless you know what you are doing.
 325
 326 config PHYP_DUMP
 327         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 328         depends on PPC_PSERIES && EXPERIMENTAL
 329         help
 330           Hypervisor-assisted dump is meant to be a kdump replacement
 331           offering robustness and speed not possible without system
 332           hypervisor assistence.
 333
 334           If unsure, say "N"
 335
 336 config PPCBUG_NVRAM
 337         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 338         default y if PPC_PREP
 339
 340 config IRQ_ALL_CPUS
 341         bool "Distribute interrupts on all CPUs by default"
 342         depends on SMP && !MV64360
 343         help
 344           This option gives the kernel permission to distribute IRQs across
 345           multiple CPUs.  Saying N here will route all IRQs to the first
 346           CPU.  Generally saying Y is safe, although some problems have been
 347           reported with SMP Power Macintoshes with this option enabled.
 348
 349 config NUMA
 350         bool "NUMA support"
 351         depends on PPC64
 352         default y if SMP && PPC_PSERIES
 353
 354 config NODES_SHIFT
 355         int
 356         default "4"
 357         depends on NEED_MULTIPLE_NODES
 358
 359 config ARCH_SELECT_MEMORY_MODEL
 360         def_bool y
 361         depends on PPC64
 362
 363 config ARCH_FLATMEM_ENABLE
 364         def_bool y
 365         depends on (PPC64 && !NUMA) || PPC32
 366
 367 config ARCH_SPARSEMEM_ENABLE
 368         def_bool y
 369         depends on PPC64
 370         select SPARSEMEM_VMEMMAP_ENABLE
 371
 372 config ARCH_SPARSEMEM_DEFAULT
 373         def_bool y
 374         depends on (SMP && PPC_PSERIES) || PPC_PS3
 375
 376 config ARCH_POPULATES_NODE_MAP
 377         def_bool y
 378
 379 source "mm/Kconfig"
 380
 381 config ARCH_MEMORY_PROBE
 382         def_bool y
 383         depends on MEMORY_HOTPLUG
 384
 385 # Some NUMA nodes have memory ranges that span
 386 # other nodes.  Even though a pfn is valid and
 387 # between a node's start and end pfns, it may not
 388 # reside on that node.  See memmap_init_zone()
 389 # for details.
 390 config NODES_SPAN_OTHER_NODES
 391         def_bool y
 392         depends on NEED_MULTIPLE_NODES
 393
 394 config PPC_HAS_HASH_64K
 395         bool
 396         depends on PPC64
 397         default n
 398
 399 config PPC_64K_PAGES
 400         bool "64k page size"
 401         depends on PPC64
 402         select PPC_HAS_HASH_64K
 403         help
 404           This option changes the kernel logical page size to 64k. On machines
 405           without processor support for 64k pages, the kernel will simulate
 406           them by loading each individual 4k page on demand transparently,
 407           while on hardware with such support, it will be used to map
 408           normal application pages.
 409
 410 config FORCE_MAX_ZONEORDER
 411         int "Maximum zone order"
 412         default "9" if PPC_64K_PAGES
 413         default "13" if PPC64 && !PPC_64K_PAGES
 414         default "11"
 415         help
 416           The kernel memory allocator divides physically contiguous memory
 417           blocks into "zones", where each zone is a power of two number of
 418           pages.  This option selects the largest power of two that the kernel
 419           keeps in the memory allocator.  If you need to allocate very large
 420           blocks of physically contiguous memory, then you may need to
 421           increase this value.
 422
 423           This config option is actually maximum order plus one. For example,
 424           a value of 11 means that the largest free memory block is 2^10 pages.
 425
 426           The page size is not necessarily 4KB.  For example, on 64-bit
 427           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 428           this in mind when choosing a value for this option.
 429
 430 config PPC_SUBPAGE_PROT
 431         bool "Support setting protections for 4k subpages"
 432         depends on PPC_64K_PAGES
 433         help
 434           This option adds support for a system call to allow user programs
 435           to set access permissions (read/write, readonly, or no access)
 436           on the 4k subpages of each 64k page.
 437
 438 config SCHED_SMT
 439         bool "SMT (Hyperthreading) scheduler support"
 440         depends on PPC64 && SMP
 441         help
 442           SMT scheduler support improves the CPU scheduler's decision making
 443           when dealing with POWER5 cpus at a cost of slightly increased
 444           overhead in some places. If unsure say N here.
 445
 446 config PROC_DEVICETREE
 447         bool "Support for device tree in /proc"
 448         depends on PROC_FS
 449         help
 450           This option adds a device-tree directory under /proc which contains
 451           an image of the device tree that the kernel copies from Open
 452           Firmware or other boot firmware. If unsure, say Y here.
 453
 454 config CMDLINE_BOOL
 455         bool "Default bootloader kernel arguments"
 456
 457 config CMDLINE
 458         string "Initial kernel command string"
 459         depends on CMDLINE_BOOL
 460         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 461         help
 462           On some platforms, there is currently no way for the boot loader to
 463           pass arguments to the kernel. For these platforms, you can supply
 464           some command-line options at build time by entering them here.  In
 465           most cases you will need to specify the root device here.
 466
 467 config EXTRA_TARGETS
 468         string "Additional default image types"
 469         help
 470           List additional targets to be built by the bootwrapper here (separated
 471           by spaces).  This is useful for targets that depend of device tree
 472           files in the .dts directory.
 473
 474           Targets in this list will be build as part of the default build
 475           target, or when the user does a 'make zImage' or a
 476           'make zImage.initrd'.
 477
 478           If unsure, leave blank
 479
 480 if !44x || BROKEN
 481 config ARCH_WANTS_FREEZER_CONTROL
 482         def_bool y
 483         depends on ADB_PMU
 484
 485 source kernel/power/Kconfig
 486 endif
 487
 488 config SECCOMP
 489         bool "Enable seccomp to safely compute untrusted bytecode"
 490         depends on PROC_FS
 491         default y
 492         help
 493           This kernel feature is useful for number crunching applications
 494           that may need to compute untrusted bytecode during their
 495           execution. By using pipes or other transports made available to
 496           the process as file descriptors supporting the read/write
 497           syscalls, it's possible to isolate those applications in
 498           their own address space using seccomp. Once seccomp is
 499           enabled via /proc/<pid>/seccomp, it cannot be disabled
 500           and the task is only allowed to execute a few safe syscalls
 501           defined by each seccomp mode.
 502
 503           If unsure, say Y. Only embedded should say N here.
 504
 505 endmenu
 506
 507 config ISA_DMA_API
 508         bool
 509         default !PPC_ISERIES || PCI
 510
 511 menu "Bus options"
 512
 513 config ISA
 514         bool "Support for ISA-bus hardware"
 515         depends on PPC_PREP || PPC_CHRP
 516         select PPC_I8259
 517         help
 518           Find out whether you have ISA slots on your motherboard.  ISA is the
 519           name of a bus system, i.e. the way the CPU talks to the other stuff
 520           inside your box.  If you have an Apple machine, say N here; if you
 521           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 522           you have an embedded board, consult your board documentation.
 523
 524 config ZONE_DMA
 525         bool
 526         default y
 527
 528 config GENERIC_ISA_DMA
 529         bool
 530         depends on PPC64 || POWER4 || 6xx && !CPM2
 531         default y
 532
 533 config PPC_INDIRECT_PCI
 534         bool
 535         depends on PCI
 536         default y if 40x || 44x
 537         default n
 538
 539 config EISA
 540         bool
 541
 542 config SBUS
 543         bool
 544
 545 config FSL_SOC
 546         bool
 547
 548 config FSL_PCI
 549         bool
 550         select PPC_INDIRECT_PCI
 551
 552 config 4xx_SOC
 553         bool
 554
 555 config FSL_LBC
 556         bool
 557         help
 558           Freescale Localbus support
 559
 560 config FSL_GTM
 561         bool
 562         depends on PPC_83xx || QUICC_ENGINE || CPM2
 563         help
 564           Freescale General-purpose Timers support
 565
 566 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 567 config MCA
 568         bool
 569
 570 config PCI
 571         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 572                 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
 573                 || PPC_PS3 || 44x
 574         default y if !40x && !CPM2 && !8xx && !PPC_MPC512x && !PPC_83xx \
 575                 && !PPC_85xx && !PPC_86xx
 576         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 577         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 578         select ARCH_SUPPORTS_MSI
 579         help
 580           Find out whether your system includes a PCI bus. PCI is the name of
 581           a bus system, i.e. the way the CPU talks to the other stuff inside
 582           your box.  If you say Y here, the kernel will include drivers and
 583           infrastructure code to support PCI bus devices.
 584
 585 config PCI_DOMAINS
 586         def_bool PCI
 587
 588 config PCI_SYSCALL
 589         def_bool PCI
 590
 591 config PCI_QSPAN
 592         bool "QSpan PCI"
 593         depends on !4xx && !CPM2 && 8xx
 594         select PPC_I8259
 595         help
 596           Say Y here if you have a system based on a Motorola 8xx-series
 597           embedded processor with a QSPAN PCI interface, otherwise say N.
 598
 599 config PCI_8260
 600         bool
 601         depends on PCI && 8260
 602         select PPC_INDIRECT_PCI
 603         default y
 604
 605 config 8260_PCI9
 606         bool "Enable workaround for MPC826x erratum PCI 9"
 607         depends on PCI_8260 && !8272
 608         default y
 609
 610 choice
 611         prompt "IDMA channel for PCI 9 workaround"
 612         depends on 8260_PCI9
 613
 614 config 8260_PCI9_IDMA1
 615         bool "IDMA1"
 616
 617 config 8260_PCI9_IDMA2
 618         bool "IDMA2"
 619
 620 config 8260_PCI9_IDMA3
 621         bool "IDMA3"
 622
 623 config 8260_PCI9_IDMA4
 624         bool "IDMA4"
 625
 626 endchoice
 627
 628 source "drivers/pci/pcie/Kconfig"
 629
 630 source "drivers/pci/Kconfig"
 631
 632 source "drivers/pcmcia/Kconfig"
 633
 634 source "drivers/pci/hotplug/Kconfig"
 635
 636 config HAS_RAPIDIO
 637         bool
 638         default n
 639
 640 config RAPIDIO
 641         bool "RapidIO support"
 642         depends on HAS_RAPIDIO
 643         help
 644           If you say Y here, the kernel will include drivers and
 645           infrastructure code to support RapidIO interconnect devices.
 646
 647 source "drivers/rapidio/Kconfig"
 648
 649 endmenu
 650
 651 menu "Advanced setup"
 652         depends on PPC32
 653
 654 config ADVANCED_OPTIONS
 655         bool "Prompt for advanced kernel configuration options"
 656         help
 657           This option will enable prompting for a variety of advanced kernel
 658           configuration options.  These options can cause the kernel to not
 659           work if they are set incorrectly, but can be used to optimize certain
 660           aspects of kernel memory management.
 661
 662           Unless you know what you are doing, say N here.
 663
 664 comment "Default settings for advanced configuration options are used"
 665         depends on !ADVANCED_OPTIONS
 666
 667 config LOWMEM_SIZE_BOOL
 668         bool "Set maximum low memory"
 669         depends on ADVANCED_OPTIONS
 670         help
 671           This option allows you to set the maximum amount of memory which
 672           will be used as "low memory", that is, memory which the kernel can
 673           access directly, without having to set up a kernel virtual mapping.
 674           This can be useful in optimizing the layout of kernel virtual
 675           memory.
 676
 677           Say N here unless you know what you are doing.
 678
 679 config LOWMEM_SIZE
 680         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 681         default "0x30000000"
 682
 683 config RELOCATABLE
 684         bool "Build a relocatable kernel (EXPERIMENTAL)"
 685         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 686         help
 687           This builds a kernel image that is capable of running at the
 688           location the kernel is loaded at (some alignment restrictions may
 689           exist).
 690
 691           One use is for the kexec on panic case where the recovery kernel
 692           must live at a different physical address than the primary
 693           kernel.
 694
 695           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 696           it has been loaded at and the compile time physical addresses
 697           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 698           setting can still be useful to bootwrappers that need to know the
 699           load location of the kernel (eg. u-boot/mkimage).
 700
 701 config PAGE_OFFSET_BOOL
 702         bool "Set custom page offset address"
 703         depends on ADVANCED_OPTIONS
 704         help
 705           This option allows you to set the kernel virtual address at which
 706           the kernel will map low memory.  This can be useful in optimizing
 707           the virtual memory layout of the system.
 708
 709           Say N here unless you know what you are doing.
 710
 711 config PAGE_OFFSET
 712         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 713         default "0xc0000000"
 714
 715 config KERNEL_START_BOOL
 716         bool "Set custom kernel base address"
 717         depends on ADVANCED_OPTIONS
 718         help
 719           This option allows you to set the kernel virtual address at which
 720           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 721           however there are times (like kdump) that one might not want them
 722           to be the same.
 723
 724           Say N here unless you know what you are doing.
 725
 726 config KERNEL_START
 727         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 728         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 729         default "0xc2000000" if CRASH_DUMP
 730         default "0xc0000000"
 731
 732 config PHYSICAL_START_BOOL
 733         bool "Set physical address where the kernel is loaded"
 734         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 735         help
 736           This gives the physical address where the kernel is loaded.
 737
 738           Say N here unless you know what you are doing.
 739
 740 config PHYSICAL_START
 741         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 742         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 743         default "0x00000000"
 744
 745 config PHYSICAL_ALIGN
 746         hex
 747         default "0x10000000" if FSL_BOOKE
 748         help
 749           This value puts the alignment restrictions on physical address
 750           where kernel is loaded and run from. Kernel is compiled for an
 751           address which meets above alignment restriction.
 752
 753 config TASK_SIZE_BOOL
 754         bool "Set custom user task size"
 755         depends on ADVANCED_OPTIONS
 756         help
 757           This option allows you to set the amount of virtual address space
 758           allocated to user tasks.  This can be useful in optimizing the
 759           virtual memory layout of the system.
 760
 761           Say N here unless you know what you are doing.
 762
 763 config TASK_SIZE
 764         hex "Size of user task space" if TASK_SIZE_BOOL
 765         default "0x80000000" if PPC_PREP || PPC_8xx
 766         default "0xc0000000"
 767
 768 config CONSISTENT_START_BOOL
 769         bool "Set custom consistent memory pool address"
 770         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 771         help
 772           This option allows you to set the base virtual address
 773           of the consistent memory pool.  This pool of virtual
 774           memory is used to make consistent memory allocations.
 775
 776 config CONSISTENT_START
 777         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 778         default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
 779         default "0xff100000" if NOT_COHERENT_CACHE
 780
 781 config CONSISTENT_SIZE_BOOL
 782         bool "Set custom consistent memory pool size"
 783         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 784         help
 785           This option allows you to set the size of the
 786           consistent memory pool.  This pool of virtual memory
 787           is used to make consistent memory allocations.
 788
 789 config CONSISTENT_SIZE
 790         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 791         default "0x00200000" if NOT_COHERENT_CACHE
 792
 793 config PIN_TLB
 794         bool "Pinned Kernel TLBs (860 ONLY)"
 795         depends on ADVANCED_OPTIONS && 8xx
 796 endmenu
 797
 798 if PPC64
 799 config PAGE_OFFSET
 800         hex
 801         default "0xc000000000000000"
 802 config KERNEL_START
 803         hex
 804         default "0xc000000002000000" if CRASH_DUMP
 805         default "0xc000000000000000"
 806 config PHYSICAL_START
 807         hex
 808         default "0x02000000" if CRASH_DUMP
 809         default "0x00000000"
 810 endif
 811
 812 source "net/Kconfig"
 813
 814 source "drivers/Kconfig"
 815
 816 source "fs/Kconfig"
 817
 818 # XXX source "arch/ppc/8xx_io/Kconfig"
 819
 820 # XXX source "arch/ppc/8260_io/Kconfig"
 821
 822 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 823
 824 source "lib/Kconfig"
 825
 826 source "arch/powerpc/Kconfig.debug"
 827
 828 source "security/Kconfig"
 829
 830 config KEYS_COMPAT
 831         bool
 832         depends on COMPAT && KEYS
 833         default y
 834
 835 source "crypto/Kconfig"
 836
 837 config PPC_CLOCK
 838         bool
 839         default n
 840
 841 config PPC_LIB_RHEAP
 842         bool
 843
 844 source "arch/powerpc/kvm/Kconfig"