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 GENERIC_HARDIRQS_NO__DO_IRQ
  46         bool
  47         default y
  48
  49 config HAVE_SETUP_PER_CPU_AREA
  50         def_bool PPC64
  51
  52 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  53         def_bool PPC64
  54
  55 config IRQ_PER_CPU
  56         bool
  57         default y
  58
  59 config STACKTRACE_SUPPORT
  60         bool
  61         default y
  62
  63 config HAVE_LATENCYTOP_SUPPORT
  64         def_bool y
  65
  66 config TRACE_IRQFLAGS_SUPPORT
  67         bool
  68         default y
  69
  70 config LOCKDEP_SUPPORT
  71         bool
  72         default y
  73
  74 config RWSEM_GENERIC_SPINLOCK
  75         bool
  76
  77 config RWSEM_XCHGADD_ALGORITHM
  78         bool
  79         default y
  80
  81 config GENERIC_LOCKBREAK
  82         bool
  83         default y
  84         depends on SMP && PREEMPT
  85
  86 config ARCH_HAS_ILOG2_U32
  87         bool
  88         default y
  89
  90 config ARCH_HAS_ILOG2_U64
  91         bool
  92         default y if 64BIT
  93
  94 config GENERIC_HWEIGHT
  95         bool
  96         default y
  97
  98 config GENERIC_FIND_NEXT_BIT
  99         bool
 100         default y
 101
 102 config GENERIC_GPIO
 103         bool
 104         help
 105           Generic GPIO API support
 106
 107 config ARCH_NO_VIRT_TO_BUS
 108         def_bool PPC64
 109
 110 config PPC
 111         bool
 112         default y
 113         select HAVE_FTRACE_MCOUNT_RECORD
 114         select HAVE_DYNAMIC_FTRACE
 115         select HAVE_FUNCTION_TRACER
 116         select HAVE_FUNCTION_GRAPH_TRACER
 117         select ARCH_WANT_OPTIONAL_GPIOLIB
 118         select HAVE_IDE
 119         select HAVE_IOREMAP_PROT
 120         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 121         select HAVE_KPROBES
 122         select HAVE_ARCH_KGDB
 123         select HAVE_KRETPROBES
 124         select HAVE_ARCH_TRACEHOOK
 125         select HAVE_LMB
 126         select HAVE_DMA_ATTRS if PPC64
 127         select USE_GENERIC_SMP_HELPERS if SMP
 128         select HAVE_OPROFILE
 129         select HAVE_SYSCALL_WRAPPERS if PPC64
 130         select GENERIC_ATOMIC64 if PPC32
 131         select HAVE_PERF_COUNTERS
 132
 133 config EARLY_PRINTK
 134         bool
 135         default y
 136
 137 config COMPAT
 138         bool
 139         default y if PPC64
 140         select COMPAT_BINFMT_ELF
 141
 142 config SYSVIPC_COMPAT
 143         bool
 144         depends on COMPAT && SYSVIPC
 145         default y
 146
 147 # All PPC32s use generic nvram driver through ppc_md
 148 config GENERIC_NVRAM
 149         bool
 150         default y if PPC32
 151
 152 config SCHED_OMIT_FRAME_POINTER
 153         bool
 154         default y
 155
 156 config ARCH_MAY_HAVE_PC_FDC
 157         bool
 158         default !PPC_PSERIES || PCI
 159
 160 config PPC_OF
 161         def_bool y
 162
 163 config OF
 164         def_bool y
 165
 166 config PPC_UDBG_16550
 167         bool
 168         default n
 169
 170 config GENERIC_TBSYNC
 171         bool
 172         default y if PPC32 && SMP
 173         default n
 174
 175 config AUDIT_ARCH
 176         bool
 177         default y
 178
 179 config GENERIC_BUG
 180         bool
 181         default y
 182         depends on BUG
 183
 184 config SYS_SUPPORTS_APM_EMULATION
 185         default y if PMAC_APM_EMU
 186         bool
 187
 188 config DTC
 189        bool
 190        default y
 191
 192 config DEFAULT_UIMAGE
 193         bool
 194         help
 195           Used to allow a board to specify it wants a uImage built by default
 196         default n
 197
 198 config REDBOOT
 199         bool
 200
 201 config HIBERNATE_32
 202         bool
 203         depends on (PPC_PMAC && !SMP) || BROKEN
 204         default y
 205
 206 config HIBERNATE_64
 207         bool
 208         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 209         default y
 210
 211 config ARCH_HIBERNATION_POSSIBLE
 212         bool
 213         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 214         default y
 215
 216 config ARCH_SUSPEND_POSSIBLE
 217         def_bool y
 218         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
 219
 220 config PPC_DCR_NATIVE
 221         bool
 222         default n
 223
 224 config PPC_DCR_MMIO
 225         bool
 226         default n
 227
 228 config PPC_DCR
 229         bool
 230         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 231         default y
 232
 233 config PPC_OF_PLATFORM_PCI
 234         bool
 235         depends on PCI
 236         depends on PPC64 # not supported on 32 bits yet
 237         default n
 238
 239 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 240         def_bool y
 241
 242 source "init/Kconfig"
 243
 244 source "kernel/Kconfig.freezer"
 245
 246 source "arch/powerpc/sysdev/Kconfig"
 247 source "arch/powerpc/platforms/Kconfig"
 248
 249 menu "Kernel options"
 250
 251 config HIGHMEM
 252         bool "High memory support"
 253         depends on PPC32
 254
 255 source kernel/time/Kconfig
 256 source kernel/Kconfig.hz
 257 source kernel/Kconfig.preempt
 258 source "fs/Kconfig.binfmt"
 259
 260 config HUGETLB_PAGE_SIZE_VARIABLE
 261         bool
 262         depends on HUGETLB_PAGE
 263         default y
 264
 265 config MATH_EMULATION
 266         bool "Math emulation"
 267         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 268         ---help---
 269           Some PowerPC chips designed for embedded applications do not have
 270           a floating-point unit and therefore do not implement the
 271           floating-point instructions in the PowerPC instruction set.  If you
 272           say Y here, the kernel will include code to emulate a floating-point
 273           unit, which will allow programs that use floating-point
 274           instructions to run.
 275
 276 config 8XX_MINIMAL_FPEMU
 277         bool "Minimal math emulation for 8xx"
 278         depends on 8xx && !MATH_EMULATION
 279         help
 280           Older arch/ppc kernels still emulated a few floating point
 281           instructions such as load and store, even when full math
 282           emulation is disabled.  Say "Y" here if you want to preserve
 283           this behavior.
 284
 285           It is recommended that you build a soft-float userspace instead.
 286
 287 config IOMMU_VMERGE
 288         bool "Enable IOMMU virtual merging"
 289         depends on PPC64
 290         default y
 291         help
 292           Cause IO segments sent to a device for DMA to be merged virtually
 293           by the IOMMU when they happen to have been allocated contiguously.
 294           This doesn't add pressure to the IOMMU allocator. However, some
 295           drivers don't support getting large merged segments coming back
 296           from *_map_sg().
 297
 298           Most drivers don't have this problem; it is safe to say Y here.
 299
 300 config IOMMU_HELPER
 301         def_bool PPC64
 302
 303 config SWIOTLB
 304         bool "SWIOTLB support"
 305         default n
 306         select IOMMU_HELPER
 307         ---help---
 308           Support for IO bounce buffering for systems without an IOMMU.
 309           This allows us to DMA to the full physical address space on
 310           platforms where the size of a physical address is larger
 311           than the bus address.  Not all platforms support this.
 312
 313 config PPC_NEED_DMA_SYNC_OPS
 314         def_bool y
 315         depends on (NOT_COHERENT_CACHE || SWIOTLB)
 316
 317 config HOTPLUG_CPU
 318         bool "Support for enabling/disabling CPUs"
 319         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 320         ---help---
 321           Say Y here to be able to disable and re-enable individual
 322           CPUs at runtime on SMP machines.
 323
 324           Say N if you are unsure.
 325
 326 config ARCH_ENABLE_MEMORY_HOTPLUG
 327         def_bool y
 328
 329 config ARCH_HAS_WALK_MEMORY
 330         def_bool y
 331
 332 config ARCH_ENABLE_MEMORY_HOTREMOVE
 333         def_bool y
 334
 335 config KEXEC
 336         bool "kexec system call (EXPERIMENTAL)"
 337         depends on PPC_BOOK3S && EXPERIMENTAL
 338         help
 339           kexec is a system call that implements the ability to shutdown your
 340           current kernel, and to start another kernel.  It is like a reboot
 341           but it is independent of the system firmware.   And like a reboot
 342           you can start any kernel with it, not just Linux.
 343
 344           The name comes from the similarity to the exec system call.
 345
 346           It is an ongoing process to be certain the hardware in a machine
 347           is properly shutdown, so do not be surprised if this code does not
 348           initially work for you.  It may help to enable device hotplugging
 349           support.  As of this writing the exact hardware interface is
 350           strongly in flux, so no good recommendation can be made.
 351
 352 config CRASH_DUMP
 353         bool "Build a kdump crash kernel"
 354         depends on PPC64 || 6xx
 355         select RELOCATABLE if PPC64
 356         help
 357           Build a kernel suitable for use as a kdump capture kernel.
 358           The same kernel binary can be used as production kernel and dump
 359           capture kernel.
 360
 361 config PHYP_DUMP
 362         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 363         depends on PPC_PSERIES && EXPERIMENTAL
 364         help
 365           Hypervisor-assisted dump is meant to be a kdump replacement
 366           offering robustness and speed not possible without system
 367           hypervisor assistance.
 368
 369           If unsure, say "N"
 370
 371 config PPCBUG_NVRAM
 372         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 373         default y if PPC_PREP
 374
 375 config IRQ_ALL_CPUS
 376         bool "Distribute interrupts on all CPUs by default"
 377         depends on SMP && !MV64360
 378         help
 379           This option gives the kernel permission to distribute IRQs across
 380           multiple CPUs.  Saying N here will route all IRQs to the first
 381           CPU.  Generally saying Y is safe, although some problems have been
 382           reported with SMP Power Macintoshes with this option enabled.
 383
 384 config NUMA
 385         bool "NUMA support"
 386         depends on PPC64
 387         default y if SMP && PPC_PSERIES
 388
 389 config NODES_SHIFT
 390         int
 391         default "4"
 392         depends on NEED_MULTIPLE_NODES
 393
 394 config ARCH_SELECT_MEMORY_MODEL
 395         def_bool y
 396         depends on PPC64
 397
 398 config ARCH_FLATMEM_ENABLE
 399         def_bool y
 400         depends on (PPC64 && !NUMA) || PPC32
 401
 402 config ARCH_SPARSEMEM_ENABLE
 403         def_bool y
 404         depends on PPC64
 405         select SPARSEMEM_VMEMMAP_ENABLE
 406
 407 config ARCH_SPARSEMEM_DEFAULT
 408         def_bool y
 409         depends on (SMP && PPC_PSERIES) || PPC_PS3
 410
 411 config ARCH_POPULATES_NODE_MAP
 412         def_bool y
 413
 414 source "mm/Kconfig"
 415
 416 config ARCH_MEMORY_PROBE
 417         def_bool y
 418         depends on MEMORY_HOTPLUG
 419
 420 # Some NUMA nodes have memory ranges that span
 421 # other nodes.  Even though a pfn is valid and
 422 # between a node's start and end pfns, it may not
 423 # reside on that node.  See memmap_init_zone()
 424 # for details.
 425 config NODES_SPAN_OTHER_NODES
 426         def_bool y
 427         depends on NEED_MULTIPLE_NODES
 428
 429 config PPC_HAS_HASH_64K
 430         bool
 431         depends on PPC64
 432         default n
 433
 434 config STDBINUTILS
 435         bool "Using standard binutils settings"
 436         depends on 44x
 437         default y
 438         help
 439           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 440           Note, that kernel will be able to run only those applications,
 441           which had been compiled using binutils later than 2.17.50.0.3 with
 442           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 443           the older binutils, you can patch them with a trivial patch, which
 444           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 445
 446 choice
 447         prompt "Page size"
 448         default PPC_4K_PAGES
 449         help
 450           Select the kernel logical page size. Increasing the page size
 451           will reduce software overhead at each page boundary, allow
 452           hardware prefetch mechanisms to be more effective, and allow
 453           larger dma transfers increasing IO efficiency and reducing
 454           overhead. However the utilization of memory will increase.
 455           For example, each cached file will using a multiple of the
 456           page size to hold its contents and the difference between the
 457           end of file and the end of page is wasted.
 458
 459           Some dedicated systems, such as software raid serving with
 460           accelerated calculations, have shown significant increases.
 461
 462           If you configure a 64 bit kernel for 64k pages but the
 463           processor does not support them, then the kernel will simulate
 464           them with 4k pages, loading them on demand, but with the
 465           reduced software overhead and larger internal fragmentation.
 466           For the 32 bit kernel, a large page option will not be offered
 467           unless it is supported by the configured processor.
 468
 469           If unsure, choose 4K_PAGES.
 470
 471 config PPC_4K_PAGES
 472         bool "4k page size"
 473
 474 config PPC_16K_PAGES
 475         bool "16k page size" if 44x
 476
 477 config PPC_64K_PAGES
 478         bool "64k page size" if 44x || PPC_STD_MMU_64
 479         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 480
 481 config PPC_256K_PAGES
 482         bool "256k page size" if 44x
 483         depends on !STDBINUTILS
 484         help
 485           Make the page size 256k.
 486
 487           As the ELF standard only requires alignment to support page
 488           sizes up to 64k, you will need to compile all of your user
 489           space applications with a non-standard binutils settings
 490           (see the STDBINUTILS description for details).
 491
 492           Say N unless you know what you are doing.
 493
 494 endchoice
 495
 496 config FORCE_MAX_ZONEORDER
 497         int "Maximum zone order"
 498         range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
 499         default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
 500         range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
 501         default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
 502         range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
 503         default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
 504         range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
 505         default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
 506         range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
 507         default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
 508         range 11 64
 509         default "11"
 510         help
 511           The kernel memory allocator divides physically contiguous memory
 512           blocks into "zones", where each zone is a power of two number of
 513           pages.  This option selects the largest power of two that the kernel
 514           keeps in the memory allocator.  If you need to allocate very large
 515           blocks of physically contiguous memory, then you may need to
 516           increase this value.
 517
 518           This config option is actually maximum order plus one. For example,
 519           a value of 11 means that the largest free memory block is 2^10 pages.
 520
 521           The page size is not necessarily 4KB.  For example, on 64-bit
 522           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 523           this in mind when choosing a value for this option.
 524
 525 config PPC_SUBPAGE_PROT
 526         bool "Support setting protections for 4k subpages"
 527         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 528         help
 529           This option adds support for a system call to allow user programs
 530           to set access permissions (read/write, readonly, or no access)
 531           on the 4k subpages of each 64k page.
 532
 533 config SCHED_SMT
 534         bool "SMT (Hyperthreading) scheduler support"
 535         depends on PPC64 && SMP
 536         help
 537           SMT scheduler support improves the CPU scheduler's decision making
 538           when dealing with POWER5 cpus at a cost of slightly increased
 539           overhead in some places. If unsure say N here.
 540
 541 config PROC_DEVICETREE
 542         bool "Support for device tree in /proc"
 543         depends on PROC_FS
 544         help
 545           This option adds a device-tree directory under /proc which contains
 546           an image of the device tree that the kernel copies from Open
 547           Firmware or other boot firmware. If unsure, say Y here.
 548
 549 config CMDLINE_BOOL
 550         bool "Default bootloader kernel arguments"
 551
 552 config CMDLINE
 553         string "Initial kernel command string"
 554         depends on CMDLINE_BOOL
 555         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 556         help
 557           On some platforms, there is currently no way for the boot loader to
 558           pass arguments to the kernel. For these platforms, you can supply
 559           some command-line options at build time by entering them here.  In
 560           most cases you will need to specify the root device here.
 561
 562 config EXTRA_TARGETS
 563         string "Additional default image types"
 564         help
 565           List additional targets to be built by the bootwrapper here (separated
 566           by spaces).  This is useful for targets that depend of device tree
 567           files in the .dts directory.
 568
 569           Targets in this list will be build as part of the default build
 570           target, or when the user does a 'make zImage' or a
 571           'make zImage.initrd'.
 572
 573           If unsure, leave blank
 574
 575 if !44x || BROKEN
 576 config ARCH_WANTS_FREEZER_CONTROL
 577         def_bool y
 578         depends on ADB_PMU
 579
 580 source kernel/power/Kconfig
 581 endif
 582
 583 config SECCOMP
 584         bool "Enable seccomp to safely compute untrusted bytecode"
 585         depends on PROC_FS
 586         default y
 587         help
 588           This kernel feature is useful for number crunching applications
 589           that may need to compute untrusted bytecode during their
 590           execution. By using pipes or other transports made available to
 591           the process as file descriptors supporting the read/write
 592           syscalls, it's possible to isolate those applications in
 593           their own address space using seccomp. Once seccomp is
 594           enabled via /proc/<pid>/seccomp, it cannot be disabled
 595           and the task is only allowed to execute a few safe syscalls
 596           defined by each seccomp mode.
 597
 598           If unsure, say Y. Only embedded should say N here.
 599
 600 endmenu
 601
 602 config ISA_DMA_API
 603         bool
 604         default !PPC_ISERIES || PCI
 605
 606 menu "Bus options"
 607
 608 config ISA
 609         bool "Support for ISA-bus hardware"
 610         depends on PPC_PREP || PPC_CHRP
 611         select PPC_I8259
 612         help
 613           Find out whether you have ISA slots on your motherboard.  ISA is the
 614           name of a bus system, i.e. the way the CPU talks to the other stuff
 615           inside your box.  If you have an Apple machine, say N here; if you
 616           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 617           you have an embedded board, consult your board documentation.
 618
 619 config ZONE_DMA
 620         bool
 621         default y
 622
 623 config GENERIC_ISA_DMA
 624         bool
 625         depends on PPC64 || POWER4 || 6xx && !CPM2
 626         default y
 627
 628 config PPC_INDIRECT_PCI
 629         bool
 630         depends on PCI
 631         default y if 40x || 44x
 632         default n
 633
 634 config EISA
 635         bool
 636
 637 config SBUS
 638         bool
 639
 640 config FSL_SOC
 641         bool
 642
 643 config FSL_PCI
 644         bool
 645         select PPC_INDIRECT_PCI
 646         select PCI_QUIRKS
 647
 648 config 4xx_SOC
 649         bool
 650
 651 config FSL_LBC
 652         bool
 653         help
 654           Freescale Localbus support
 655
 656 config FSL_GTM
 657         bool
 658         depends on PPC_83xx || QUICC_ENGINE || CPM2
 659         help
 660           Freescale General-purpose Timers support
 661
 662 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 663 config MCA
 664         bool
 665
 666 # Platforms that what PCI turned unconditionally just do select PCI
 667 # in their config node.  Platforms that want to choose at config
 668 # time should select PPC_PCI_CHOICE
 669 config PPC_PCI_CHOICE
 670         bool
 671
 672 config PCI
 673         bool "PCI support" if PPC_PCI_CHOICE
 674         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 675                 && !PPC_85xx && !PPC_86xx
 676         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 677         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 678         select ARCH_SUPPORTS_MSI
 679         help
 680           Find out whether your system includes a PCI bus. PCI is the name of
 681           a bus system, i.e. the way the CPU talks to the other stuff inside
 682           your box.  If you say Y here, the kernel will include drivers and
 683           infrastructure code to support PCI bus devices.
 684
 685 config PCI_DOMAINS
 686         def_bool PCI
 687
 688 config PCI_SYSCALL
 689         def_bool PCI
 690
 691 config PCI_QSPAN
 692         bool "QSpan PCI"
 693         depends on !4xx && !CPM2 && 8xx
 694         select PPC_I8259
 695         help
 696           Say Y here if you have a system based on a Motorola 8xx-series
 697           embedded processor with a QSPAN PCI interface, otherwise say N.
 698
 699 config PCI_8260
 700         bool
 701         depends on PCI && 8260
 702         select PPC_INDIRECT_PCI
 703         default y
 704
 705 config 8260_PCI9
 706         bool "Enable workaround for MPC826x erratum PCI 9"
 707         depends on PCI_8260 && !8272
 708         default y
 709
 710 choice
 711         prompt "IDMA channel for PCI 9 workaround"
 712         depends on 8260_PCI9
 713
 714 config 8260_PCI9_IDMA1
 715         bool "IDMA1"
 716
 717 config 8260_PCI9_IDMA2
 718         bool "IDMA2"
 719
 720 config 8260_PCI9_IDMA3
 721         bool "IDMA3"
 722
 723 config 8260_PCI9_IDMA4
 724         bool "IDMA4"
 725
 726 endchoice
 727
 728 source "drivers/pci/pcie/Kconfig"
 729
 730 source "drivers/pci/Kconfig"
 731
 732 source "drivers/pcmcia/Kconfig"
 733
 734 source "drivers/pci/hotplug/Kconfig"
 735
 736 config HAS_RAPIDIO
 737         bool
 738         default n
 739
 740 config RAPIDIO
 741         bool "RapidIO support"
 742         depends on HAS_RAPIDIO
 743         help
 744           If you say Y here, the kernel will include drivers and
 745           infrastructure code to support RapidIO interconnect devices.
 746
 747 source "drivers/rapidio/Kconfig"
 748
 749 endmenu
 750
 751 menu "Advanced setup"
 752         depends on PPC32
 753
 754 config ADVANCED_OPTIONS
 755         bool "Prompt for advanced kernel configuration options"
 756         help
 757           This option will enable prompting for a variety of advanced kernel
 758           configuration options.  These options can cause the kernel to not
 759           work if they are set incorrectly, but can be used to optimize certain
 760           aspects of kernel memory management.
 761
 762           Unless you know what you are doing, say N here.
 763
 764 comment "Default settings for advanced configuration options are used"
 765         depends on !ADVANCED_OPTIONS
 766
 767 config LOWMEM_SIZE_BOOL
 768         bool "Set maximum low memory"
 769         depends on ADVANCED_OPTIONS
 770         help
 771           This option allows you to set the maximum amount of memory which
 772           will be used as "low memory", that is, memory which the kernel can
 773           access directly, without having to set up a kernel virtual mapping.
 774           This can be useful in optimizing the layout of kernel virtual
 775           memory.
 776
 777           Say N here unless you know what you are doing.
 778
 779 config LOWMEM_SIZE
 780         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 781         default "0x30000000"
 782
 783 config LOWMEM_CAM_NUM_BOOL
 784         bool "Set number of CAMs to use to map low memory"
 785         depends on ADVANCED_OPTIONS && FSL_BOOKE
 786         help
 787           This option allows you to set the maximum number of CAM slots that
 788           will be used to map low memory.  There are a limited number of slots
 789           available and even more limited number that will fit in the L1 MMU.
 790           However, using more entries will allow mapping more low memory.  This
 791           can be useful in optimizing the layout of kernel virtual memory.
 792
 793           Say N here unless you know what you are doing.
 794
 795 config LOWMEM_CAM_NUM
 796         depends on FSL_BOOKE
 797         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 798         default 3
 799
 800 config RELOCATABLE
 801         bool "Build a relocatable kernel (EXPERIMENTAL)"
 802         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 803         help
 804           This builds a kernel image that is capable of running at the
 805           location the kernel is loaded at (some alignment restrictions may
 806           exist).
 807
 808           One use is for the kexec on panic case where the recovery kernel
 809           must live at a different physical address than the primary
 810           kernel.
 811
 812           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 813           it has been loaded at and the compile time physical addresses
 814           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 815           setting can still be useful to bootwrappers that need to know the
 816           load location of the kernel (eg. u-boot/mkimage).
 817
 818 config PAGE_OFFSET_BOOL
 819         bool "Set custom page offset address"
 820         depends on ADVANCED_OPTIONS
 821         help
 822           This option allows you to set the kernel virtual address at which
 823           the kernel will map low memory.  This can be useful in optimizing
 824           the virtual memory layout of the system.
 825
 826           Say N here unless you know what you are doing.
 827
 828 config PAGE_OFFSET
 829         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 830         default "0xc0000000"
 831
 832 config KERNEL_START_BOOL
 833         bool "Set custom kernel base address"
 834         depends on ADVANCED_OPTIONS
 835         help
 836           This option allows you to set the kernel virtual address at which
 837           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 838           however there are times (like kdump) that one might not want them
 839           to be the same.
 840
 841           Say N here unless you know what you are doing.
 842
 843 config KERNEL_START
 844         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 845         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 846         default "0xc2000000" if CRASH_DUMP
 847         default "0xc0000000"
 848
 849 config PHYSICAL_START_BOOL
 850         bool "Set physical address where the kernel is loaded"
 851         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 852         help
 853           This gives the physical address where the kernel is loaded.
 854
 855           Say N here unless you know what you are doing.
 856
 857 config PHYSICAL_START
 858         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 859         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 860         default "0x00000000"
 861
 862 config PHYSICAL_ALIGN
 863         hex
 864         default "0x04000000" if FSL_BOOKE
 865         help
 866           This value puts the alignment restrictions on physical address
 867           where kernel is loaded and run from. Kernel is compiled for an
 868           address which meets above alignment restriction.
 869
 870 config TASK_SIZE_BOOL
 871         bool "Set custom user task size"
 872         depends on ADVANCED_OPTIONS
 873         help
 874           This option allows you to set the amount of virtual address space
 875           allocated to user tasks.  This can be useful in optimizing the
 876           virtual memory layout of the system.
 877
 878           Say N here unless you know what you are doing.
 879
 880 config TASK_SIZE
 881         hex "Size of user task space" if TASK_SIZE_BOOL
 882         default "0x80000000" if PPC_PREP || PPC_8xx
 883         default "0xc0000000"
 884
 885 config CONSISTENT_SIZE_BOOL
 886         bool "Set custom consistent memory pool size"
 887         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 888         help
 889           This option allows you to set the size of the
 890           consistent memory pool.  This pool of virtual memory
 891           is used to make consistent memory allocations.
 892
 893 config CONSISTENT_SIZE
 894         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 895         default "0x00200000" if NOT_COHERENT_CACHE
 896
 897 config PIN_TLB
 898         bool "Pinned Kernel TLBs (860 ONLY)"
 899         depends on ADVANCED_OPTIONS && 8xx
 900 endmenu
 901
 902 if PPC64
 903 config RELOCATABLE
 904         bool "Build a relocatable kernel"
 905         help
 906           This builds a kernel image that is capable of running anywhere
 907           in the RMA (real memory area) at any 16k-aligned base address.
 908           The kernel is linked as a position-independent executable (PIE)
 909           and contains dynamic relocations which are processed early
 910           in the bootup process.
 911
 912           One use is for the kexec on panic case where the recovery kernel
 913           must live at a different physical address than the primary
 914           kernel.
 915
 916 config PAGE_OFFSET
 917         hex
 918         default "0xc000000000000000"
 919 config KERNEL_START
 920         hex
 921         default "0xc000000000000000"
 922 config PHYSICAL_START
 923         hex
 924         default "0x00000000"
 925 endif
 926
 927 source "net/Kconfig"
 928
 929 source "drivers/Kconfig"
 930
 931 source "fs/Kconfig"
 932
 933 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 934
 935 source "lib/Kconfig"
 936
 937 source "arch/powerpc/Kconfig.debug"
 938
 939 source "security/Kconfig"
 940
 941 config KEYS_COMPAT
 942         bool
 943         depends on COMPAT && KEYS
 944         default y
 945
 946 source "crypto/Kconfig"
 947
 948 config PPC_CLOCK
 949         bool
 950         default n
 951         select HAVE_CLK
 952
 953 config PPC_LIB_RHEAP
 954         bool
 955
 956 source "arch/powerpc/kvm/Kconfig"