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 ARCH_PHYS_ADDR_T_64BIT
  23        def_bool PPC64 || PHYS_64BIT
  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_FTRACE_MCOUNT_RECORD
 112         select HAVE_DYNAMIC_FTRACE
 113         select HAVE_FUNCTION_TRACER
 114         select ARCH_WANT_OPTIONAL_GPIOLIB
 115         select HAVE_IDE
 116         select HAVE_IOREMAP_PROT
 117         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 118         select HAVE_KPROBES
 119         select HAVE_ARCH_KGDB
 120         select HAVE_KRETPROBES
 121         select HAVE_ARCH_TRACEHOOK
 122         select HAVE_LMB
 123         select HAVE_DMA_ATTRS if PPC64
 124         select USE_GENERIC_SMP_HELPERS if SMP
 125         select HAVE_OPROFILE
 126
 127 config EARLY_PRINTK
 128         bool
 129         default y
 130
 131 config COMPAT
 132         bool
 133         default y if PPC64
 134         select COMPAT_BINFMT_ELF
 135
 136 config SYSVIPC_COMPAT
 137         bool
 138         depends on COMPAT && SYSVIPC
 139         default y
 140
 141 # All PPC32s use generic nvram driver through ppc_md
 142 config GENERIC_NVRAM
 143         bool
 144         default y if PPC32
 145
 146 config SCHED_OMIT_FRAME_POINTER
 147         bool
 148         default y
 149
 150 config ARCH_MAY_HAVE_PC_FDC
 151         bool
 152         default !PPC_PSERIES || PCI
 153
 154 config PPC_OF
 155         def_bool y
 156
 157 config OF
 158         def_bool y
 159
 160 config PPC_UDBG_16550
 161         bool
 162         default n
 163
 164 config GENERIC_TBSYNC
 165         bool
 166         default y if PPC32 && SMP
 167         default n
 168
 169 config AUDIT_ARCH
 170         bool
 171         default y
 172
 173 config GENERIC_BUG
 174         bool
 175         default y
 176         depends on BUG
 177
 178 config SYS_SUPPORTS_APM_EMULATION
 179         default y if PMAC_APM_EMU
 180         bool
 181
 182 config DEFAULT_UIMAGE
 183         bool
 184         help
 185           Used to allow a board to specify it wants a uImage built by default
 186         default n
 187
 188 config REDBOOT
 189         bool
 190
 191 config HIBERNATE_32
 192         bool
 193         depends on (PPC_PMAC && !SMP) || BROKEN
 194         default y
 195
 196 config HIBERNATE_64
 197         bool
 198         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 199         default y
 200
 201 config ARCH_HIBERNATION_POSSIBLE
 202         bool
 203         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 204         default y
 205
 206 config ARCH_SUSPEND_POSSIBLE
 207         def_bool y
 208         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
 209
 210 config PPC_DCR_NATIVE
 211         bool
 212         default n
 213
 214 config PPC_DCR_MMIO
 215         bool
 216         default n
 217
 218 config PPC_DCR
 219         bool
 220         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 221         default y
 222
 223 config PPC_OF_PLATFORM_PCI
 224         bool
 225         depends on PCI
 226         depends on PPC64 # not supported on 32 bits yet
 227         default n
 228
 229 source "init/Kconfig"
 230
 231 source "kernel/Kconfig.freezer"
 232
 233 source "arch/powerpc/sysdev/Kconfig"
 234 source "arch/powerpc/platforms/Kconfig"
 235
 236 menu "Kernel options"
 237
 238 config HIGHMEM
 239         bool "High memory support"
 240         depends on PPC32
 241
 242 source kernel/time/Kconfig
 243 source kernel/Kconfig.hz
 244 source kernel/Kconfig.preempt
 245 source "fs/Kconfig.binfmt"
 246
 247 config HUGETLB_PAGE_SIZE_VARIABLE
 248         bool
 249         depends on HUGETLB_PAGE
 250         default y
 251
 252 config MATH_EMULATION
 253         bool "Math emulation"
 254         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 255         ---help---
 256           Some PowerPC chips designed for embedded applications do not have
 257           a floating-point unit and therefore do not implement the
 258           floating-point instructions in the PowerPC instruction set.  If you
 259           say Y here, the kernel will include code to emulate a floating-point
 260           unit, which will allow programs that use floating-point
 261           instructions to run.
 262
 263 config 8XX_MINIMAL_FPEMU
 264         bool "Minimal math emulation for 8xx"
 265         depends on 8xx && !MATH_EMULATION
 266         help
 267           Older arch/ppc kernels still emulated a few floating point
 268           instructions such as load and store, even when full math
 269           emulation is disabled.  Say "Y" here if you want to preserve
 270           this behavior.
 271
 272           It is recommended that you build a soft-float userspace instead.
 273
 274 config IOMMU_VMERGE
 275         bool "Enable IOMMU virtual merging"
 276         depends on PPC64
 277         default y
 278         help
 279           Cause IO segments sent to a device for DMA to be merged virtually
 280           by the IOMMU when they happen to have been allocated contiguously.
 281           This doesn't add pressure to the IOMMU allocator. However, some
 282           drivers don't support getting large merged segments coming back
 283           from *_map_sg().
 284
 285           Most drivers don't have this problem; it is safe to say Y here.
 286
 287 config IOMMU_HELPER
 288         def_bool PPC64
 289
 290 config PPC_NEED_DMA_SYNC_OPS
 291         def_bool y
 292         depends on NOT_COHERENT_CACHE
 293
 294 config HOTPLUG_CPU
 295         bool "Support for enabling/disabling CPUs"
 296         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 297         ---help---
 298           Say Y here to be able to disable and re-enable individual
 299           CPUs at runtime on SMP machines.
 300
 301           Say N if you are unsure.
 302
 303 config ARCH_ENABLE_MEMORY_HOTPLUG
 304         def_bool y
 305
 306 config ARCH_HAS_WALK_MEMORY
 307         def_bool y
 308
 309 config ARCH_ENABLE_MEMORY_HOTREMOVE
 310         def_bool y
 311
 312 config KEXEC
 313         bool "kexec system call (EXPERIMENTAL)"
 314         depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
 315         help
 316           kexec is a system call that implements the ability to shutdown your
 317           current kernel, and to start another kernel.  It is like a reboot
 318           but it is independent of the system firmware.   And like a reboot
 319           you can start any kernel with it, not just Linux.
 320
 321           The name comes from the similarity to the exec system call.
 322
 323           It is an ongoing process to be certain the hardware in a machine
 324           is properly shutdown, so do not be surprised if this code does not
 325           initially work for you.  It may help to enable device hotplugging
 326           support.  As of this writing the exact hardware interface is
 327           strongly in flux, so no good recommendation can be made.
 328
 329 config CRASH_DUMP
 330         bool "Build a kdump crash kernel"
 331         depends on PPC64 || 6xx
 332         select RELOCATABLE if PPC64
 333         help
 334           Build a kernel suitable for use as a kdump capture kernel.
 335           The same kernel binary can be used as production kernel and dump
 336           capture kernel.
 337
 338 config PHYP_DUMP
 339         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 340         depends on PPC_PSERIES && EXPERIMENTAL
 341         help
 342           Hypervisor-assisted dump is meant to be a kdump replacement
 343           offering robustness and speed not possible without system
 344           hypervisor assistence.
 345
 346           If unsure, say "N"
 347
 348 config PPCBUG_NVRAM
 349         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 350         default y if PPC_PREP
 351
 352 config IRQ_ALL_CPUS
 353         bool "Distribute interrupts on all CPUs by default"
 354         depends on SMP && !MV64360
 355         help
 356           This option gives the kernel permission to distribute IRQs across
 357           multiple CPUs.  Saying N here will route all IRQs to the first
 358           CPU.  Generally saying Y is safe, although some problems have been
 359           reported with SMP Power Macintoshes with this option enabled.
 360
 361 config NUMA
 362         bool "NUMA support"
 363         depends on PPC64
 364         default y if SMP && PPC_PSERIES
 365
 366 config NODES_SHIFT
 367         int
 368         default "4"
 369         depends on NEED_MULTIPLE_NODES
 370
 371 config ARCH_SELECT_MEMORY_MODEL
 372         def_bool y
 373         depends on PPC64
 374
 375 config ARCH_FLATMEM_ENABLE
 376         def_bool y
 377         depends on (PPC64 && !NUMA) || PPC32
 378
 379 config ARCH_SPARSEMEM_ENABLE
 380         def_bool y
 381         depends on PPC64
 382         select SPARSEMEM_VMEMMAP_ENABLE
 383
 384 config ARCH_SPARSEMEM_DEFAULT
 385         def_bool y
 386         depends on (SMP && PPC_PSERIES) || PPC_PS3
 387
 388 config ARCH_POPULATES_NODE_MAP
 389         def_bool y
 390
 391 source "mm/Kconfig"
 392
 393 config ARCH_MEMORY_PROBE
 394         def_bool y
 395         depends on MEMORY_HOTPLUG
 396
 397 # Some NUMA nodes have memory ranges that span
 398 # other nodes.  Even though a pfn is valid and
 399 # between a node's start and end pfns, it may not
 400 # reside on that node.  See memmap_init_zone()
 401 # for details.
 402 config NODES_SPAN_OTHER_NODES
 403         def_bool y
 404         depends on NEED_MULTIPLE_NODES
 405
 406 config PPC_HAS_HASH_64K
 407         bool
 408         depends on PPC64
 409         default n
 410
 411 choice
 412         prompt "Page size"
 413         default PPC_4K_PAGES
 414         help
 415           Select the kernel logical page size. Increasing the page size
 416           will reduce software overhead at each page boundary, allow
 417           hardware prefetch mechanisms to be more effective, and allow
 418           larger dma transfers increasing IO efficiency and reducing
 419           overhead. However the utilization of memory will increase.
 420           For example, each cached file will using a multiple of the
 421           page size to hold its contents and the difference between the
 422           end of file and the end of page is wasted.
 423
 424           Some dedicated systems, such as software raid serving with
 425           accelerated calculations, have shown significant increases.
 426
 427           If you configure a 64 bit kernel for 64k pages but the
 428           processor does not support them, then the kernel will simulate
 429           them with 4k pages, loading them on demand, but with the
 430           reduced software overhead and larger internal fragmentation.
 431           For the 32 bit kernel, a large page option will not be offered
 432           unless it is supported by the configured processor.
 433
 434           If unsure, choose 4K_PAGES.
 435
 436 config PPC_4K_PAGES
 437         bool "4k page size"
 438
 439 config PPC_16K_PAGES
 440         bool "16k page size" if 44x
 441
 442 config PPC_64K_PAGES
 443         bool "64k page size" if 44x || PPC_STD_MMU_64
 444         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 445
 446 endchoice
 447
 448 config FORCE_MAX_ZONEORDER
 449         int "Maximum zone order"
 450         range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
 451         default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
 452         range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
 453         default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
 454         range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
 455         default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
 456         range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
 457         default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
 458         range 11 64
 459         default "11"
 460         help
 461           The kernel memory allocator divides physically contiguous memory
 462           blocks into "zones", where each zone is a power of two number of
 463           pages.  This option selects the largest power of two that the kernel
 464           keeps in the memory allocator.  If you need to allocate very large
 465           blocks of physically contiguous memory, then you may need to
 466           increase this value.
 467
 468           This config option is actually maximum order plus one. For example,
 469           a value of 11 means that the largest free memory block is 2^10 pages.
 470
 471           The page size is not necessarily 4KB.  For example, on 64-bit
 472           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 473           this in mind when choosing a value for this option.
 474
 475 config PPC_SUBPAGE_PROT
 476         bool "Support setting protections for 4k subpages"
 477         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 478         help
 479           This option adds support for a system call to allow user programs
 480           to set access permissions (read/write, readonly, or no access)
 481           on the 4k subpages of each 64k page.
 482
 483 config SCHED_SMT
 484         bool "SMT (Hyperthreading) scheduler support"
 485         depends on PPC64 && SMP
 486         help
 487           SMT scheduler support improves the CPU scheduler's decision making
 488           when dealing with POWER5 cpus at a cost of slightly increased
 489           overhead in some places. If unsure say N here.
 490
 491 config PROC_DEVICETREE
 492         bool "Support for device tree in /proc"
 493         depends on PROC_FS
 494         help
 495           This option adds a device-tree directory under /proc which contains
 496           an image of the device tree that the kernel copies from Open
 497           Firmware or other boot firmware. If unsure, say Y here.
 498
 499 config CMDLINE_BOOL
 500         bool "Default bootloader kernel arguments"
 501
 502 config CMDLINE
 503         string "Initial kernel command string"
 504         depends on CMDLINE_BOOL
 505         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 506         help
 507           On some platforms, there is currently no way for the boot loader to
 508           pass arguments to the kernel. For these platforms, you can supply
 509           some command-line options at build time by entering them here.  In
 510           most cases you will need to specify the root device here.
 511
 512 config EXTRA_TARGETS
 513         string "Additional default image types"
 514         help
 515           List additional targets to be built by the bootwrapper here (separated
 516           by spaces).  This is useful for targets that depend of device tree
 517           files in the .dts directory.
 518
 519           Targets in this list will be build as part of the default build
 520           target, or when the user does a 'make zImage' or a
 521           'make zImage.initrd'.
 522
 523           If unsure, leave blank
 524
 525 if !44x || BROKEN
 526 config ARCH_WANTS_FREEZER_CONTROL
 527         def_bool y
 528         depends on ADB_PMU
 529
 530 source kernel/power/Kconfig
 531 endif
 532
 533 config SECCOMP
 534         bool "Enable seccomp to safely compute untrusted bytecode"
 535         depends on PROC_FS
 536         default y
 537         help
 538           This kernel feature is useful for number crunching applications
 539           that may need to compute untrusted bytecode during their
 540           execution. By using pipes or other transports made available to
 541           the process as file descriptors supporting the read/write
 542           syscalls, it's possible to isolate those applications in
 543           their own address space using seccomp. Once seccomp is
 544           enabled via /proc/<pid>/seccomp, it cannot be disabled
 545           and the task is only allowed to execute a few safe syscalls
 546           defined by each seccomp mode.
 547
 548           If unsure, say Y. Only embedded should say N here.
 549
 550 endmenu
 551
 552 config ISA_DMA_API
 553         bool
 554         default !PPC_ISERIES || PCI
 555
 556 menu "Bus options"
 557
 558 config ISA
 559         bool "Support for ISA-bus hardware"
 560         depends on PPC_PREP || PPC_CHRP
 561         select PPC_I8259
 562         help
 563           Find out whether you have ISA slots on your motherboard.  ISA is the
 564           name of a bus system, i.e. the way the CPU talks to the other stuff
 565           inside your box.  If you have an Apple machine, say N here; if you
 566           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 567           you have an embedded board, consult your board documentation.
 568
 569 config ZONE_DMA
 570         bool
 571         default y
 572
 573 config GENERIC_ISA_DMA
 574         bool
 575         depends on PPC64 || POWER4 || 6xx && !CPM2
 576         default y
 577
 578 config PPC_INDIRECT_PCI
 579         bool
 580         depends on PCI
 581         default y if 40x || 44x
 582         default n
 583
 584 config EISA
 585         bool
 586
 587 config SBUS
 588         bool
 589
 590 config FSL_SOC
 591         bool
 592
 593 config FSL_PCI
 594         bool
 595         select PPC_INDIRECT_PCI
 596
 597 config 4xx_SOC
 598         bool
 599
 600 config FSL_LBC
 601         bool
 602         help
 603           Freescale Localbus support
 604
 605 config FSL_GTM
 606         bool
 607         depends on PPC_83xx || QUICC_ENGINE || CPM2
 608         help
 609           Freescale General-purpose Timers support
 610
 611 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 612 config MCA
 613         bool
 614
 615 # Platforms that what PCI turned unconditionally just do select PCI
 616 # in their config node.  Platforms that want to choose at config
 617 # time should select PPC_PCI_CHOICE
 618 config PPC_PCI_CHOICE
 619         bool
 620
 621 config PCI
 622         bool "PCI support" if PPC_PCI_CHOICE
 623         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 624                 && !PPC_85xx && !PPC_86xx
 625         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 626         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 627         select ARCH_SUPPORTS_MSI
 628         help
 629           Find out whether your system includes a PCI bus. PCI is the name of
 630           a bus system, i.e. the way the CPU talks to the other stuff inside
 631           your box.  If you say Y here, the kernel will include drivers and
 632           infrastructure code to support PCI bus devices.
 633
 634 config PCI_DOMAINS
 635         def_bool PCI
 636
 637 config PCI_SYSCALL
 638         def_bool PCI
 639
 640 config PCI_QSPAN
 641         bool "QSpan PCI"
 642         depends on !4xx && !CPM2 && 8xx
 643         select PPC_I8259
 644         help
 645           Say Y here if you have a system based on a Motorola 8xx-series
 646           embedded processor with a QSPAN PCI interface, otherwise say N.
 647
 648 config PCI_8260
 649         bool
 650         depends on PCI && 8260
 651         select PPC_INDIRECT_PCI
 652         default y
 653
 654 config 8260_PCI9
 655         bool "Enable workaround for MPC826x erratum PCI 9"
 656         depends on PCI_8260 && !8272
 657         default y
 658
 659 choice
 660         prompt "IDMA channel for PCI 9 workaround"
 661         depends on 8260_PCI9
 662
 663 config 8260_PCI9_IDMA1
 664         bool "IDMA1"
 665
 666 config 8260_PCI9_IDMA2
 667         bool "IDMA2"
 668
 669 config 8260_PCI9_IDMA3
 670         bool "IDMA3"
 671
 672 config 8260_PCI9_IDMA4
 673         bool "IDMA4"
 674
 675 endchoice
 676
 677 source "drivers/pci/pcie/Kconfig"
 678
 679 source "drivers/pci/Kconfig"
 680
 681 source "drivers/pcmcia/Kconfig"
 682
 683 source "drivers/pci/hotplug/Kconfig"
 684
 685 config HAS_RAPIDIO
 686         bool
 687         default n
 688
 689 config RAPIDIO
 690         bool "RapidIO support"
 691         depends on HAS_RAPIDIO
 692         help
 693           If you say Y here, the kernel will include drivers and
 694           infrastructure code to support RapidIO interconnect devices.
 695
 696 source "drivers/rapidio/Kconfig"
 697
 698 endmenu
 699
 700 menu "Advanced setup"
 701         depends on PPC32
 702
 703 config ADVANCED_OPTIONS
 704         bool "Prompt for advanced kernel configuration options"
 705         help
 706           This option will enable prompting for a variety of advanced kernel
 707           configuration options.  These options can cause the kernel to not
 708           work if they are set incorrectly, but can be used to optimize certain
 709           aspects of kernel memory management.
 710
 711           Unless you know what you are doing, say N here.
 712
 713 comment "Default settings for advanced configuration options are used"
 714         depends on !ADVANCED_OPTIONS
 715
 716 config LOWMEM_SIZE_BOOL
 717         bool "Set maximum low memory"
 718         depends on ADVANCED_OPTIONS
 719         help
 720           This option allows you to set the maximum amount of memory which
 721           will be used as "low memory", that is, memory which the kernel can
 722           access directly, without having to set up a kernel virtual mapping.
 723           This can be useful in optimizing the layout of kernel virtual
 724           memory.
 725
 726           Say N here unless you know what you are doing.
 727
 728 config LOWMEM_SIZE
 729         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 730         default "0x30000000"
 731
 732 config RELOCATABLE
 733         bool "Build a relocatable kernel (EXPERIMENTAL)"
 734         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 735         help
 736           This builds a kernel image that is capable of running at the
 737           location the kernel is loaded at (some alignment restrictions may
 738           exist).
 739
 740           One use is for the kexec on panic case where the recovery kernel
 741           must live at a different physical address than the primary
 742           kernel.
 743
 744           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 745           it has been loaded at and the compile time physical addresses
 746           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 747           setting can still be useful to bootwrappers that need to know the
 748           load location of the kernel (eg. u-boot/mkimage).
 749
 750 config PAGE_OFFSET_BOOL
 751         bool "Set custom page offset address"
 752         depends on ADVANCED_OPTIONS
 753         help
 754           This option allows you to set the kernel virtual address at which
 755           the kernel will map low memory.  This can be useful in optimizing
 756           the virtual memory layout of the system.
 757
 758           Say N here unless you know what you are doing.
 759
 760 config PAGE_OFFSET
 761         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 762         default "0xc0000000"
 763
 764 config KERNEL_START_BOOL
 765         bool "Set custom kernel base address"
 766         depends on ADVANCED_OPTIONS
 767         help
 768           This option allows you to set the kernel virtual address at which
 769           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 770           however there are times (like kdump) that one might not want them
 771           to be the same.
 772
 773           Say N here unless you know what you are doing.
 774
 775 config KERNEL_START
 776         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 777         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 778         default "0xc2000000" if CRASH_DUMP
 779         default "0xc0000000"
 780
 781 config PHYSICAL_START_BOOL
 782         bool "Set physical address where the kernel is loaded"
 783         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 784         help
 785           This gives the physical address where the kernel is loaded.
 786
 787           Say N here unless you know what you are doing.
 788
 789 config PHYSICAL_START
 790         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 791         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 792         default "0x00000000"
 793
 794 config PHYSICAL_ALIGN
 795         hex
 796         default "0x10000000" if FSL_BOOKE
 797         help
 798           This value puts the alignment restrictions on physical address
 799           where kernel is loaded and run from. Kernel is compiled for an
 800           address which meets above alignment restriction.
 801
 802 config TASK_SIZE_BOOL
 803         bool "Set custom user task size"
 804         depends on ADVANCED_OPTIONS
 805         help
 806           This option allows you to set the amount of virtual address space
 807           allocated to user tasks.  This can be useful in optimizing the
 808           virtual memory layout of the system.
 809
 810           Say N here unless you know what you are doing.
 811
 812 config TASK_SIZE
 813         hex "Size of user task space" if TASK_SIZE_BOOL
 814         default "0x80000000" if PPC_PREP || PPC_8xx
 815         default "0xc0000000"
 816
 817 config CONSISTENT_START_BOOL
 818         bool "Set custom consistent memory pool address"
 819         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 820         help
 821           This option allows you to set the base virtual address
 822           of the consistent memory pool.  This pool of virtual
 823           memory is used to make consistent memory allocations.
 824
 825 config CONSISTENT_START
 826         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 827         default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
 828         default "0xff100000" if NOT_COHERENT_CACHE
 829
 830 config CONSISTENT_SIZE_BOOL
 831         bool "Set custom consistent memory pool size"
 832         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 833         help
 834           This option allows you to set the size of the
 835           consistent memory pool.  This pool of virtual memory
 836           is used to make consistent memory allocations.
 837
 838 config CONSISTENT_SIZE
 839         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 840         default "0x00200000" if NOT_COHERENT_CACHE
 841
 842 config PIN_TLB
 843         bool "Pinned Kernel TLBs (860 ONLY)"
 844         depends on ADVANCED_OPTIONS && 8xx
 845 endmenu
 846
 847 if PPC64
 848 config RELOCATABLE
 849         bool "Build a relocatable kernel"
 850         help
 851           This builds a kernel image that is capable of running anywhere
 852           in the RMA (real memory area) at any 16k-aligned base address.
 853           The kernel is linked as a position-independent executable (PIE)
 854           and contains dynamic relocations which are processed early
 855           in the bootup process.
 856
 857           One use is for the kexec on panic case where the recovery kernel
 858           must live at a different physical address than the primary
 859           kernel.
 860
 861 config PAGE_OFFSET
 862         hex
 863         default "0xc000000000000000"
 864 config KERNEL_START
 865         hex
 866         default "0xc000000000000000"
 867 config PHYSICAL_START
 868         hex
 869         default "0x00000000"
 870 endif
 871
 872 source "net/Kconfig"
 873
 874 source "drivers/Kconfig"
 875
 876 source "fs/Kconfig"
 877
 878 # XXX source "arch/ppc/8xx_io/Kconfig"
 879
 880 # XXX source "arch/ppc/8260_io/Kconfig"
 881
 882 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 883
 884 source "lib/Kconfig"
 885
 886 source "arch/powerpc/Kconfig.debug"
 887
 888 source "security/Kconfig"
 889
 890 config KEYS_COMPAT
 891         bool
 892         depends on COMPAT && KEYS
 893         default y
 894
 895 source "crypto/Kconfig"
 896
 897 config PPC_CLOCK
 898         bool
 899         default n
 900         select HAVE_CLK
 901
 902 config PPC_LIB_RHEAP
 903         bool
 904
 905 source "arch/powerpc/kvm/Kconfig"