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