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