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_VSYSCALL
  33         def_bool y
  34
  35 config GENERIC_CLOCKEVENTS
  36         def_bool y
  37
  38 config GENERIC_HARDIRQS
  39         bool
  40         default y
  41
  42 config GENERIC_HARDIRQS_NO__DO_IRQ
  43         bool
  44         default y
  45
  46 config HAVE_SETUP_PER_CPU_AREA
  47         def_bool PPC64
  48
  49 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  50         def_bool PPC64
  51
  52 config IRQ_PER_CPU
  53         bool
  54         default y
  55
  56 config NR_IRQS
  57         int "Number of virtual interrupt numbers"
  58         range 32 32768
  59         default "512"
  60         help
  61           This defines the number of virtual interrupt numbers the kernel
  62           can manage. Virtual interrupt numbers are what you see in
  63           /proc/interrupts. If you configure your system to have too few,
  64           drivers will fail to load or worse - handle with care.
  65
  66 config STACKTRACE_SUPPORT
  67         bool
  68         default y
  69
  70 config HAVE_LATENCYTOP_SUPPORT
  71         def_bool y
  72
  73 config TRACE_IRQFLAGS_SUPPORT
  74         bool
  75         default y
  76
  77 config LOCKDEP_SUPPORT
  78         bool
  79         default y
  80
  81 config RWSEM_GENERIC_SPINLOCK
  82         bool
  83
  84 config RWSEM_XCHGADD_ALGORITHM
  85         bool
  86         default y
  87
  88 config GENERIC_LOCKBREAK
  89         bool
  90         default y
  91         depends on SMP && PREEMPT
  92
  93 config ARCH_HAS_ILOG2_U32
  94         bool
  95         default y
  96
  97 config ARCH_HAS_ILOG2_U64
  98         bool
  99         default y if 64BIT
 100
 101 config GENERIC_HWEIGHT
 102         bool
 103         default y
 104
 105 config GENERIC_FIND_NEXT_BIT
 106         bool
 107         default y
 108
 109 config GENERIC_GPIO
 110         bool
 111         help
 112           Generic GPIO API support
 113
 114 config ARCH_NO_VIRT_TO_BUS
 115         def_bool PPC64
 116
 117 config PPC
 118         bool
 119         default y
 120         select OF
 121         select OF_FLATTREE
 122         select HAVE_FTRACE_MCOUNT_RECORD
 123         select HAVE_DYNAMIC_FTRACE
 124         select HAVE_FUNCTION_TRACER
 125         select HAVE_FUNCTION_GRAPH_TRACER
 126         select ARCH_WANT_OPTIONAL_GPIOLIB
 127         select HAVE_IDE
 128         select HAVE_IOREMAP_PROT
 129         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 130         select HAVE_KPROBES
 131         select HAVE_ARCH_KGDB
 132         select HAVE_KRETPROBES
 133         select HAVE_ARCH_TRACEHOOK
 134         select HAVE_MEMBLOCK
 135         select HAVE_DMA_ATTRS
 136         select HAVE_DMA_API_DEBUG
 137         select USE_GENERIC_SMP_HELPERS if SMP
 138         select HAVE_OPROFILE
 139         select HAVE_SYSCALL_WRAPPERS if PPC64
 140         select GENERIC_ATOMIC64 if PPC32
 141         select HAVE_IRQ_WORK
 142         select HAVE_PERF_EVENTS
 143         select HAVE_REGS_AND_STACK_ACCESS_API
 144         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 145
 146 config EARLY_PRINTK
 147         bool
 148         default y
 149
 150 config COMPAT
 151         bool
 152         default y if PPC64
 153         select COMPAT_BINFMT_ELF
 154
 155 config SYSVIPC_COMPAT
 156         bool
 157         depends on COMPAT && SYSVIPC
 158         default y
 159
 160 # All PPC32s use generic nvram driver through ppc_md
 161 config GENERIC_NVRAM
 162         bool
 163         default y if PPC32
 164
 165 config SCHED_OMIT_FRAME_POINTER
 166         bool
 167         default y
 168
 169 config ARCH_MAY_HAVE_PC_FDC
 170         bool
 171         default !PPC_PSERIES || PCI
 172
 173 config PPC_OF
 174         def_bool y
 175
 176 config PPC_UDBG_16550
 177         bool
 178         default n
 179
 180 config GENERIC_TBSYNC
 181         bool
 182         default y if PPC32 && SMP
 183         default n
 184
 185 config AUDIT_ARCH
 186         bool
 187         default y
 188
 189 config GENERIC_BUG
 190         bool
 191         default y
 192         depends on BUG
 193
 194 config SYS_SUPPORTS_APM_EMULATION
 195         default y if PMAC_APM_EMU
 196         bool
 197
 198 config DEFAULT_UIMAGE
 199         bool
 200         help
 201           Used to allow a board to specify it wants a uImage built by default
 202         default n
 203
 204 config REDBOOT
 205         bool
 206
 207 config ARCH_HIBERNATION_POSSIBLE
 208         bool
 209         default y
 210
 211 config ARCH_SUSPEND_POSSIBLE
 212         def_bool y
 213         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 214                    PPC_85xx || PPC_86xx || PPC_PSERIES
 215
 216 config PPC_DCR_NATIVE
 217         bool
 218         default n
 219
 220 config PPC_DCR_MMIO
 221         bool
 222         default n
 223
 224 config PPC_DCR
 225         bool
 226         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 227         default y
 228
 229 config PPC_OF_PLATFORM_PCI
 230         bool
 231         depends on PCI
 232         depends on PPC64 # not supported on 32 bits yet
 233         default n
 234
 235 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 236         def_bool y
 237
 238 config PPC_ADV_DEBUG_REGS
 239         bool
 240         depends on 40x || BOOKE
 241         default y
 242
 243 config PPC_ADV_DEBUG_IACS
 244         int
 245         depends on PPC_ADV_DEBUG_REGS
 246         default 4 if 44x
 247         default 2
 248
 249 config PPC_ADV_DEBUG_DACS
 250         int
 251         depends on PPC_ADV_DEBUG_REGS
 252         default 2
 253
 254 config PPC_ADV_DEBUG_DVCS
 255         int
 256         depends on PPC_ADV_DEBUG_REGS
 257         default 2 if 44x
 258         default 0
 259
 260 config PPC_ADV_DEBUG_DAC_RANGE
 261         bool
 262         depends on PPC_ADV_DEBUG_REGS && 44x
 263         default y
 264
 265 source "init/Kconfig"
 266
 267 source "kernel/Kconfig.freezer"
 268
 269 source "arch/powerpc/sysdev/Kconfig"
 270 source "arch/powerpc/platforms/Kconfig"
 271
 272 menu "Kernel options"
 273
 274 config HIGHMEM
 275         bool "High memory support"
 276         depends on PPC32
 277
 278 source kernel/time/Kconfig
 279 source kernel/Kconfig.hz
 280 source kernel/Kconfig.preempt
 281 source "fs/Kconfig.binfmt"
 282
 283 config HUGETLB_PAGE_SIZE_VARIABLE
 284         bool
 285         depends on HUGETLB_PAGE
 286         default y
 287
 288 config MATH_EMULATION
 289         bool "Math emulation"
 290         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 291         ---help---
 292           Some PowerPC chips designed for embedded applications do not have
 293           a floating-point unit and therefore do not implement the
 294           floating-point instructions in the PowerPC instruction set.  If you
 295           say Y here, the kernel will include code to emulate a floating-point
 296           unit, which will allow programs that use floating-point
 297           instructions to run.
 298
 299 config 8XX_MINIMAL_FPEMU
 300         bool "Minimal math emulation for 8xx"
 301         depends on 8xx && !MATH_EMULATION
 302         help
 303           Older arch/ppc kernels still emulated a few floating point
 304           instructions such as load and store, even when full math
 305           emulation is disabled.  Say "Y" here if you want to preserve
 306           this behavior.
 307
 308           It is recommended that you build a soft-float userspace instead.
 309
 310 config IOMMU_HELPER
 311         def_bool PPC64
 312
 313 config SWIOTLB
 314         bool "SWIOTLB support"
 315         default n
 316         select IOMMU_HELPER
 317         ---help---
 318           Support for IO bounce buffering for systems without an IOMMU.
 319           This allows us to DMA to the full physical address space on
 320           platforms where the size of a physical address is larger
 321           than the bus address.  Not all platforms support this.
 322
 323 config HOTPLUG_CPU
 324         bool "Support for enabling/disabling CPUs"
 325         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 326         ---help---
 327           Say Y here to be able to disable and re-enable individual
 328           CPUs at runtime on SMP machines.
 329
 330           Say N if you are unsure.
 331
 332 config ARCH_CPU_PROBE_RELEASE
 333         def_bool y
 334         depends on HOTPLUG_CPU
 335
 336 config ARCH_ENABLE_MEMORY_HOTPLUG
 337         def_bool y
 338
 339 config ARCH_HAS_WALK_MEMORY
 340         def_bool y
 341
 342 config ARCH_ENABLE_MEMORY_HOTREMOVE
 343         def_bool y
 344
 345 config KEXEC
 346         bool "kexec system call (EXPERIMENTAL)"
 347         depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
 348         help
 349           kexec is a system call that implements the ability to shutdown your
 350           current kernel, and to start another kernel.  It is like a reboot
 351           but it is independent of the system firmware.   And like a reboot
 352           you can start any kernel with it, not just Linux.
 353
 354           The name comes from the similarity to the exec system call.
 355
 356           It is an ongoing process to be certain the hardware in a machine
 357           is properly shutdown, so do not be surprised if this code does not
 358           initially work for you.  It may help to enable device hotplugging
 359           support.  As of this writing the exact hardware interface is
 360           strongly in flux, so no good recommendation can be made.
 361
 362 config CRASH_DUMP
 363         bool "Build a kdump crash kernel"
 364         depends on PPC64 || 6xx || FSL_BOOKE
 365         select RELOCATABLE if PPC64 || FSL_BOOKE
 366         help
 367           Build a kernel suitable for use as a kdump capture kernel.
 368           The same kernel binary can be used as production kernel and dump
 369           capture kernel.
 370
 371 config PHYP_DUMP
 372         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 373         depends on PPC_PSERIES && EXPERIMENTAL
 374         help
 375           Hypervisor-assisted dump is meant to be a kdump replacement
 376           offering robustness and speed not possible without system
 377           hypervisor assistance.
 378
 379           If unsure, say "N"
 380
 381 config PPCBUG_NVRAM
 382         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 383         default y if PPC_PREP
 384
 385 config IRQ_ALL_CPUS
 386         bool "Distribute interrupts on all CPUs by default"
 387         depends on SMP && !MV64360
 388         help
 389           This option gives the kernel permission to distribute IRQs across
 390           multiple CPUs.  Saying N here will route all IRQs to the first
 391           CPU.  Generally saying Y is safe, although some problems have been
 392           reported with SMP Power Macintoshes with this option enabled.
 393
 394 config SPARSE_IRQ
 395         bool "Support sparse irq numbering"
 396         default n
 397         help
 398           This enables support for sparse irqs. This is useful for distro
 399           kernels that want to define a high CONFIG_NR_CPUS value but still
 400           want to have low kernel memory footprint on smaller machines.
 401
 402           ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
 403             out the irq_desc[] array in a more NUMA-friendly way. )
 404
 405           If you don't know what to do here, say N.
 406
 407 config NUMA
 408         bool "NUMA support"
 409         depends on PPC64
 410         default y if SMP && PPC_PSERIES
 411
 412 config NODES_SHIFT
 413         int
 414         default "8" if PPC64
 415         default "4"
 416         depends on NEED_MULTIPLE_NODES
 417
 418 config MAX_ACTIVE_REGIONS
 419         int
 420         default "256" if PPC64
 421         default "32"
 422
 423 config ARCH_SELECT_MEMORY_MODEL
 424         def_bool y
 425         depends on PPC64
 426
 427 config ARCH_FLATMEM_ENABLE
 428         def_bool y
 429         depends on (PPC64 && !NUMA) || PPC32
 430
 431 config ARCH_SPARSEMEM_ENABLE
 432         def_bool y
 433         depends on PPC64
 434         select SPARSEMEM_VMEMMAP_ENABLE
 435
 436 config ARCH_SPARSEMEM_DEFAULT
 437         def_bool y
 438         depends on (SMP && PPC_PSERIES) || PPC_PS3
 439
 440 config ARCH_POPULATES_NODE_MAP
 441         def_bool y
 442
 443 config SYS_SUPPORTS_HUGETLBFS
 444        def_bool y
 445        depends on PPC_BOOK3S_64
 446
 447 source "mm/Kconfig"
 448
 449 config ARCH_MEMORY_PROBE
 450         def_bool y
 451         depends on MEMORY_HOTPLUG
 452
 453 # Some NUMA nodes have memory ranges that span
 454 # other nodes.  Even though a pfn is valid and
 455 # between a node's start and end pfns, it may not
 456 # reside on that node.  See memmap_init_zone()
 457 # for details.
 458 config NODES_SPAN_OTHER_NODES
 459         def_bool y
 460         depends on NEED_MULTIPLE_NODES
 461
 462 config PPC_HAS_HASH_64K
 463         bool
 464         depends on PPC64
 465         default n
 466
 467 config STDBINUTILS
 468         bool "Using standard binutils settings"
 469         depends on 44x
 470         default y
 471         help
 472           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 473           Note, that kernel will be able to run only those applications,
 474           which had been compiled using binutils later than 2.17.50.0.3 with
 475           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 476           the older binutils, you can patch them with a trivial patch, which
 477           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 478
 479 choice
 480         prompt "Page size"
 481         default PPC_4K_PAGES
 482         help
 483           Select the kernel logical page size. Increasing the page size
 484           will reduce software overhead at each page boundary, allow
 485           hardware prefetch mechanisms to be more effective, and allow
 486           larger dma transfers increasing IO efficiency and reducing
 487           overhead. However the utilization of memory will increase.
 488           For example, each cached file will using a multiple of the
 489           page size to hold its contents and the difference between the
 490           end of file and the end of page is wasted.
 491
 492           Some dedicated systems, such as software raid serving with
 493           accelerated calculations, have shown significant increases.
 494
 495           If you configure a 64 bit kernel for 64k pages but the
 496           processor does not support them, then the kernel will simulate
 497           them with 4k pages, loading them on demand, but with the
 498           reduced software overhead and larger internal fragmentation.
 499           For the 32 bit kernel, a large page option will not be offered
 500           unless it is supported by the configured processor.
 501
 502           If unsure, choose 4K_PAGES.
 503
 504 config PPC_4K_PAGES
 505         bool "4k page size"
 506
 507 config PPC_16K_PAGES
 508         bool "16k page size" if 44x
 509
 510 config PPC_64K_PAGES
 511         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
 512         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 513
 514 config PPC_256K_PAGES
 515         bool "256k page size" if 44x
 516         depends on !STDBINUTILS
 517         help
 518           Make the page size 256k.
 519
 520           As the ELF standard only requires alignment to support page
 521           sizes up to 64k, you will need to compile all of your user
 522           space applications with a non-standard binutils settings
 523           (see the STDBINUTILS description for details).
 524
 525           Say N unless you know what you are doing.
 526
 527 endchoice
 528
 529 config FORCE_MAX_ZONEORDER
 530         int "Maximum zone order"
 531         range 9 64 if PPC64 && PPC_64K_PAGES
 532         default "9" if PPC64 && PPC_64K_PAGES
 533         range 13 64 if PPC64 && !PPC_64K_PAGES
 534         default "13" if PPC64 && !PPC_64K_PAGES
 535         range 9 64 if PPC32 && PPC_16K_PAGES
 536         default "9" if PPC32 && PPC_16K_PAGES
 537         range 7 64 if PPC32 && PPC_64K_PAGES
 538         default "7" if PPC32 && PPC_64K_PAGES
 539         range 5 64 if PPC32 && PPC_256K_PAGES
 540         default "5" if PPC32 && PPC_256K_PAGES
 541         range 11 64
 542         default "11"
 543         help
 544           The kernel memory allocator divides physically contiguous memory
 545           blocks into "zones", where each zone is a power of two number of
 546           pages.  This option selects the largest power of two that the kernel
 547           keeps in the memory allocator.  If you need to allocate very large
 548           blocks of physically contiguous memory, then you may need to
 549           increase this value.
 550
 551           This config option is actually maximum order plus one. For example,
 552           a value of 11 means that the largest free memory block is 2^10 pages.
 553
 554           The page size is not necessarily 4KB.  For example, on 64-bit
 555           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 556           this in mind when choosing a value for this option.
 557
 558 config PPC_SUBPAGE_PROT
 559         bool "Support setting protections for 4k subpages"
 560         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 561         help
 562           This option adds support for a system call to allow user programs
 563           to set access permissions (read/write, readonly, or no access)
 564           on the 4k subpages of each 64k page.
 565
 566 config SCHED_SMT
 567         bool "SMT (Hyperthreading) scheduler support"
 568         depends on PPC64 && SMP
 569         help
 570           SMT scheduler support improves the CPU scheduler's decision making
 571           when dealing with POWER5 cpus at a cost of slightly increased
 572           overhead in some places. If unsure say N here.
 573
 574 config CMDLINE_BOOL
 575         bool "Default bootloader kernel arguments"
 576
 577 config CMDLINE
 578         string "Initial kernel command string"
 579         depends on CMDLINE_BOOL
 580         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 581         help
 582           On some platforms, there is currently no way for the boot loader to
 583           pass arguments to the kernel. For these platforms, you can supply
 584           some command-line options at build time by entering them here.  In
 585           most cases you will need to specify the root device here.
 586
 587 config EXTRA_TARGETS
 588         string "Additional default image types"
 589         help
 590           List additional targets to be built by the bootwrapper here (separated
 591           by spaces).  This is useful for targets that depend of device tree
 592           files in the .dts directory.
 593
 594           Targets in this list will be build as part of the default build
 595           target, or when the user does a 'make zImage' or a
 596           'make zImage.initrd'.
 597
 598           If unsure, leave blank
 599
 600 if !44x || BROKEN
 601 config ARCH_WANTS_FREEZER_CONTROL
 602         def_bool y
 603         depends on ADB_PMU
 604
 605 source kernel/power/Kconfig
 606 endif
 607
 608 config SECCOMP
 609         bool "Enable seccomp to safely compute untrusted bytecode"
 610         depends on PROC_FS
 611         default y
 612         help
 613           This kernel feature is useful for number crunching applications
 614           that may need to compute untrusted bytecode during their
 615           execution. By using pipes or other transports made available to
 616           the process as file descriptors supporting the read/write
 617           syscalls, it's possible to isolate those applications in
 618           their own address space using seccomp. Once seccomp is
 619           enabled via /proc/<pid>/seccomp, it cannot be disabled
 620           and the task is only allowed to execute a few safe syscalls
 621           defined by each seccomp mode.
 622
 623           If unsure, say Y. Only embedded should say N here.
 624
 625 endmenu
 626
 627 config ISA_DMA_API
 628         bool
 629         default !PPC_ISERIES || PCI
 630
 631 menu "Bus options"
 632
 633 config ISA
 634         bool "Support for ISA-bus hardware"
 635         depends on PPC_PREP || PPC_CHRP
 636         select PPC_I8259
 637         help
 638           Find out whether you have ISA slots on your motherboard.  ISA is the
 639           name of a bus system, i.e. the way the CPU talks to the other stuff
 640           inside your box.  If you have an Apple machine, say N here; if you
 641           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 642           you have an embedded board, consult your board documentation.
 643
 644 config ZONE_DMA
 645         bool
 646         default y
 647
 648 config NEED_DMA_MAP_STATE
 649         def_bool (PPC64 || NOT_COHERENT_CACHE)
 650
 651 config NEED_SG_DMA_LENGTH
 652         def_bool y
 653
 654 config GENERIC_ISA_DMA
 655         bool
 656         depends on ISA_DMA_API
 657         default y
 658
 659 config PPC_INDIRECT_PCI
 660         bool
 661         depends on PCI
 662         default y if 40x || 44x
 663         default n
 664
 665 config EISA
 666         bool
 667
 668 config SBUS
 669         bool
 670
 671 config FSL_SOC
 672         bool
 673
 674 config FSL_PCI
 675         bool
 676         select PPC_INDIRECT_PCI
 677         select PCI_QUIRKS
 678
 679 config FSL_PMC
 680         bool
 681         default y
 682         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 683         help
 684           Freescale MPC85xx/MPC86xx power management controller support
 685           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 686
 687 config 4xx_SOC
 688         bool
 689
 690 config FSL_LBC
 691         bool
 692         help
 693           Freescale Localbus support
 694
 695 config FSL_GTM
 696         bool
 697         depends on PPC_83xx || QUICC_ENGINE || CPM2
 698         help
 699           Freescale General-purpose Timers support
 700
 701 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 702 config MCA
 703         bool
 704
 705 # Platforms that what PCI turned unconditionally just do select PCI
 706 # in their config node.  Platforms that want to choose at config
 707 # time should select PPC_PCI_CHOICE
 708 config PPC_PCI_CHOICE
 709         bool
 710
 711 config PCI
 712         bool "PCI support" if PPC_PCI_CHOICE
 713         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 714                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 715         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 716         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 717         select ARCH_SUPPORTS_MSI
 718         help
 719           Find out whether your system includes a PCI bus. PCI is the name of
 720           a bus system, i.e. the way the CPU talks to the other stuff inside
 721           your box.  If you say Y here, the kernel will include drivers and
 722           infrastructure code to support PCI bus devices.
 723
 724 config PCI_DOMAINS
 725         def_bool PCI
 726
 727 config PCI_SYSCALL
 728         def_bool PCI
 729
 730 config PCI_QSPAN
 731         bool "QSpan PCI"
 732         depends on !4xx && !CPM2 && 8xx
 733         select PPC_I8259
 734         help
 735           Say Y here if you have a system based on a Motorola 8xx-series
 736           embedded processor with a QSPAN PCI interface, otherwise say N.
 737
 738 config PCI_8260
 739         bool
 740         depends on PCI && 8260
 741         select PPC_INDIRECT_PCI
 742         default y
 743
 744 config 8260_PCI9
 745         bool "Enable workaround for MPC826x erratum PCI 9"
 746         depends on PCI_8260 && !8272
 747         default y
 748
 749 choice
 750         prompt "IDMA channel for PCI 9 workaround"
 751         depends on 8260_PCI9
 752
 753 config 8260_PCI9_IDMA1
 754         bool "IDMA1"
 755
 756 config 8260_PCI9_IDMA2
 757         bool "IDMA2"
 758
 759 config 8260_PCI9_IDMA3
 760         bool "IDMA3"
 761
 762 config 8260_PCI9_IDMA4
 763         bool "IDMA4"
 764
 765 endchoice
 766
 767 source "drivers/pci/pcie/Kconfig"
 768
 769 source "drivers/pci/Kconfig"
 770
 771 source "drivers/pcmcia/Kconfig"
 772
 773 source "drivers/pci/hotplug/Kconfig"
 774
 775 config HAS_RAPIDIO
 776         bool
 777         default n
 778
 779 config RAPIDIO
 780         bool "RapidIO support"
 781         depends on HAS_RAPIDIO
 782         help
 783           If you say Y here, the kernel will include drivers and
 784           infrastructure code to support RapidIO interconnect devices.
 785
 786 source "drivers/rapidio/Kconfig"
 787
 788 endmenu
 789
 790 menu "Advanced setup"
 791         depends on PPC32
 792
 793 config ADVANCED_OPTIONS
 794         bool "Prompt for advanced kernel configuration options"
 795         help
 796           This option will enable prompting for a variety of advanced kernel
 797           configuration options.  These options can cause the kernel to not
 798           work if they are set incorrectly, but can be used to optimize certain
 799           aspects of kernel memory management.
 800
 801           Unless you know what you are doing, say N here.
 802
 803 comment "Default settings for advanced configuration options are used"
 804         depends on !ADVANCED_OPTIONS
 805
 806 config LOWMEM_SIZE_BOOL
 807         bool "Set maximum low memory"
 808         depends on ADVANCED_OPTIONS
 809         help
 810           This option allows you to set the maximum amount of memory which
 811           will be used as "low memory", that is, memory which the kernel can
 812           access directly, without having to set up a kernel virtual mapping.
 813           This can be useful in optimizing the layout of kernel virtual
 814           memory.
 815
 816           Say N here unless you know what you are doing.
 817
 818 config LOWMEM_SIZE
 819         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 820         default "0x30000000"
 821
 822 config LOWMEM_CAM_NUM_BOOL
 823         bool "Set number of CAMs to use to map low memory"
 824         depends on ADVANCED_OPTIONS && FSL_BOOKE
 825         help
 826           This option allows you to set the maximum number of CAM slots that
 827           will be used to map low memory.  There are a limited number of slots
 828           available and even more limited number that will fit in the L1 MMU.
 829           However, using more entries will allow mapping more low memory.  This
 830           can be useful in optimizing the layout of kernel virtual memory.
 831
 832           Say N here unless you know what you are doing.
 833
 834 config LOWMEM_CAM_NUM
 835         depends on FSL_BOOKE
 836         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 837         default 3
 838
 839 config RELOCATABLE
 840         bool "Build a relocatable kernel (EXPERIMENTAL)"
 841         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 842         help
 843           This builds a kernel image that is capable of running at the
 844           location the kernel is loaded at (some alignment restrictions may
 845           exist).
 846
 847           One use is for the kexec on panic case where the recovery kernel
 848           must live at a different physical address than the primary
 849           kernel.
 850
 851           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 852           it has been loaded at and the compile time physical addresses
 853           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 854           setting can still be useful to bootwrappers that need to know the
 855           load location of the kernel (eg. u-boot/mkimage).
 856
 857 config PAGE_OFFSET_BOOL
 858         bool "Set custom page offset address"
 859         depends on ADVANCED_OPTIONS
 860         help
 861           This option allows you to set the kernel virtual address at which
 862           the kernel will map low memory.  This can be useful in optimizing
 863           the virtual memory layout of the system.
 864
 865           Say N here unless you know what you are doing.
 866
 867 config PAGE_OFFSET
 868         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 869         default "0xc0000000"
 870
 871 config KERNEL_START_BOOL
 872         bool "Set custom kernel base address"
 873         depends on ADVANCED_OPTIONS
 874         help
 875           This option allows you to set the kernel virtual address at which
 876           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 877           however there are times (like kdump) that one might not want them
 878           to be the same.
 879
 880           Say N here unless you know what you are doing.
 881
 882 config KERNEL_START
 883         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 884         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 885         default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
 886         default "0xc0000000"
 887
 888 config PHYSICAL_START_BOOL
 889         bool "Set physical address where the kernel is loaded"
 890         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 891         help
 892           This gives the physical address where the kernel is loaded.
 893
 894           Say N here unless you know what you are doing.
 895
 896 config PHYSICAL_START
 897         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 898         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
 899         default "0x00000000"
 900
 901 config PHYSICAL_ALIGN
 902         hex
 903         default "0x04000000" if FSL_BOOKE
 904         help
 905           This value puts the alignment restrictions on physical address
 906           where kernel is loaded and run from. Kernel is compiled for an
 907           address which meets above alignment restriction.
 908
 909 config TASK_SIZE_BOOL
 910         bool "Set custom user task size"
 911         depends on ADVANCED_OPTIONS
 912         help
 913           This option allows you to set the amount of virtual address space
 914           allocated to user tasks.  This can be useful in optimizing the
 915           virtual memory layout of the system.
 916
 917           Say N here unless you know what you are doing.
 918
 919 config TASK_SIZE
 920         hex "Size of user task space" if TASK_SIZE_BOOL
 921         default "0x80000000" if PPC_PREP || PPC_8xx
 922         default "0xc0000000"
 923
 924 config CONSISTENT_SIZE_BOOL
 925         bool "Set custom consistent memory pool size"
 926         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 927         help
 928           This option allows you to set the size of the
 929           consistent memory pool.  This pool of virtual memory
 930           is used to make consistent memory allocations.
 931
 932 config CONSISTENT_SIZE
 933         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 934         default "0x00200000" if NOT_COHERENT_CACHE
 935
 936 config PIN_TLB
 937         bool "Pinned Kernel TLBs (860 ONLY)"
 938         depends on ADVANCED_OPTIONS && 8xx
 939 endmenu
 940
 941 if PPC64
 942 config RELOCATABLE
 943         bool "Build a relocatable kernel"
 944         help
 945           This builds a kernel image that is capable of running anywhere
 946           in the RMA (real memory area) at any 16k-aligned base address.
 947           The kernel is linked as a position-independent executable (PIE)
 948           and contains dynamic relocations which are processed early
 949           in the bootup process.
 950
 951           One use is for the kexec on panic case where the recovery kernel
 952           must live at a different physical address than the primary
 953           kernel.
 954
 955 config PAGE_OFFSET
 956         hex
 957         default "0xc000000000000000"
 958 config KERNEL_START
 959         hex
 960         default "0xc000000000000000"
 961 config PHYSICAL_START
 962         hex
 963         default "0x00000000"
 964 endif
 965
 966 source "net/Kconfig"
 967
 968 source "drivers/Kconfig"
 969
 970 source "fs/Kconfig"
 971
 972 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 973
 974 source "lib/Kconfig"
 975
 976 source "arch/powerpc/Kconfig.debug"
 977
 978 source "security/Kconfig"
 979
 980 config KEYS_COMPAT
 981         bool
 982         depends on COMPAT && KEYS
 983         default y
 984
 985 source "crypto/Kconfig"
 986
 987 config PPC_CLOCK
 988         bool
 989         default n
 990         select HAVE_CLK
 991
 992 config PPC_LIB_RHEAP
 993         bool
 994
 995 source "arch/powerpc/kvm/Kconfig"