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