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 config PPC64
   8         bool "64-bit kernel"
   9         default n
  10         help
  11           This option selects whether a 32-bit or a 64-bit kernel
  12           will be built.
  13
  14 config PPC_PM_NEEDS_RTC_LIB
  15         bool
  16         select RTC_LIB
  17         default y if PM
  18
  19 config PPC32
  20         bool
  21         default y if !PPC64
  22
  23 config 64BIT
  24         bool
  25         default y if PPC64
  26
  27 config PPC_MERGE
  28         def_bool y
  29
  30 config MMU
  31         bool
  32         default y
  33
  34 config GENERIC_HARDIRQS
  35         bool
  36         default y
  37
  38 config IRQ_PER_CPU
  39         bool
  40         default y
  41
  42 config RWSEM_GENERIC_SPINLOCK
  43         bool
  44
  45 config RWSEM_XCHGADD_ALGORITHM
  46         bool
  47         default y
  48
  49 config ARCH_HAS_ILOG2_U32
  50         bool
  51         default y
  52
  53 config ARCH_HAS_ILOG2_U64
  54         bool
  55         default y if 64BIT
  56
  57 config GENERIC_HWEIGHT
  58         bool
  59         default y
  60
  61 config GENERIC_CALIBRATE_DELAY
  62         bool
  63         default y
  64
  65 config GENERIC_FIND_NEXT_BIT
  66         bool
  67         default y
  68
  69 config PPC
  70         bool
  71         default y
  72
  73 config EARLY_PRINTK
  74         bool
  75         default y
  76
  77 config COMPAT
  78         bool
  79         default y if PPC64
  80
  81 config SYSVIPC_COMPAT
  82         bool
  83         depends on COMPAT && SYSVIPC
  84         default y
  85
  86 # All PPC32s use generic nvram driver through ppc_md
  87 config GENERIC_NVRAM
  88         bool
  89         default y if PPC32
  90
  91 config SCHED_NO_NO_OMIT_FRAME_POINTER
  92         bool
  93         default y
  94
  95 config ARCH_MAY_HAVE_PC_FDC
  96         bool
  97         default !PPC_PSERIES || PCI
  98
  99 config PPC_OF
 100         def_bool y
 101
 102 config PPC_UDBG_16550
 103         bool
 104         default n
 105
 106 config GENERIC_TBSYNC
 107         bool
 108         default y if PPC32 && SMP
 109         default n
 110
 111 config AUDIT_ARCH
 112         bool
 113         default y
 114
 115 config GENERIC_BUG
 116         bool
 117         default y
 118         depends on BUG
 119
 120 config SYS_SUPPORTS_APM_EMULATION
 121         bool
 122
 123 #
 124 # Powerpc uses the slab allocator to manage its ptes and the
 125 # page structs of ptes are used for splitting the page table
 126 # lock for configurations supporting more than SPLIT_PTLOCK_CPUS.
 127 #
 128 # In that special configuration the page structs of slabs are modified.
 129 # This setting disables the selection of SLUB as a slab allocator.
 130 #
 131 config ARCH_USES_SLAB_PAGE_STRUCT
 132         bool
 133         default y
 134         depends on SPLIT_PTLOCK_CPUS <= NR_CPUS
 135
 136 config DEFAULT_UIMAGE
 137         bool
 138         help
 139           Used to allow a board to specify it wants a uImage built by default
 140         default n
 141
 142 config PPC64_SWSUSP
 143         bool
 144         depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
 145         default y
 146
 147 menu "Processor support"
 148 choice
 149         prompt "Processor Type"
 150         depends on PPC32
 151         default 6xx
 152
 153 config CLASSIC32
 154         bool "52xx/6xx/7xx/74xx"
 155         select PPC_FPU
 156         select 6xx
 157         help
 158           There are four families of PowerPC chips supported.  The more common
 159           types (601, 603, 604, 740, 750, 7400), the Motorola embedded
 160           versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
 161           embedded versions (403 and 405) and the high end 64 bit Power
 162           processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
 163
 164           This option is the catch-all for 6xx types, including some of the
 165           embedded versions.  Unless there is see an option for the specific
 166           chip family you are using, you want this option.
 167
 168           You do not want this if you are building a kernel for a 64 bit
 169           IBM RS/6000 or an Apple G5, choose 6xx.
 170
 171           If unsure, select this option
 172
 173           Note that the kernel runs in 32-bit mode even on 64-bit chips.
 174
 175 config PPC_82xx
 176         bool "Freescale 82xx"
 177         select 6xx
 178         select PPC_FPU
 179
 180 config PPC_83xx
 181         bool "Freescale 83xx"
 182         select 6xx
 183         select FSL_SOC
 184         select 83xx
 185         select PPC_FPU
 186         select WANT_DEVICE_TREE
 187
 188 config PPC_85xx
 189         bool "Freescale 85xx"
 190         select E500
 191         select FSL_SOC
 192         select 85xx
 193         select WANT_DEVICE_TREE
 194
 195 config PPC_86xx
 196         bool "Freescale 86xx"
 197         select 6xx
 198         select FSL_SOC
 199         select FSL_PCIE
 200         select PPC_FPU
 201         select ALTIVEC
 202         help
 203           The Freescale E600 SoCs have 74xx cores.
 204
 205 config PPC_8xx
 206         bool "Freescale 8xx"
 207         select FSL_SOC
 208         select 8xx
 209
 210 config 40x
 211         bool "AMCC 40x"
 212         select PPC_DCR_NATIVE
 213
 214 config 44x
 215         bool "AMCC 44x"
 216         select PPC_DCR_NATIVE
 217         select WANT_DEVICE_TREE
 218
 219 config E200
 220         bool "Freescale e200"
 221
 222 endchoice
 223
 224 config POWER4_ONLY
 225         bool "Optimize for POWER4"
 226         depends on PPC64
 227         default n
 228         ---help---
 229           Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
 230           The resulting binary will not work on POWER3 or RS64 processors
 231           when compiled with binutils 2.15 or later.
 232
 233 config POWER3
 234         bool
 235         depends on PPC64
 236         default y if !POWER4_ONLY
 237
 238 config POWER4
 239         depends on PPC64
 240         def_bool y
 241
 242 config 6xx
 243         bool
 244
 245 # this is temp to handle compat with arch=ppc
 246 config 8xx
 247         bool
 248
 249 # this is temp to handle compat with arch=ppc
 250 config 83xx
 251         bool
 252
 253 # this is temp to handle compat with arch=ppc
 254 config 85xx
 255         bool
 256
 257 config E500
 258         bool
 259
 260 config PPC_FPU
 261         bool
 262         default y if PPC64
 263
 264 config PPC_DCR_NATIVE
 265         bool
 266         default n
 267
 268 config PPC_DCR_MMIO
 269         bool
 270         default n
 271
 272 config PPC_DCR
 273         bool
 274         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 275         default y
 276
 277 config PPC_OF_PLATFORM_PCI
 278         bool
 279         depends on PPC64 # not supported on 32 bits yet
 280         default n
 281
 282 config 4xx
 283         bool
 284         depends on 40x || 44x
 285         default y
 286
 287 config BOOKE
 288         bool
 289         depends on E200 || E500 || 44x
 290         default y
 291
 292 config FSL_BOOKE
 293         bool
 294         depends on E200 || E500
 295         default y
 296
 297 config PTE_64BIT
 298         bool
 299         depends on 44x || E500
 300         default y if 44x
 301         default y if E500 && PHYS_64BIT
 302
 303 config PHYS_64BIT
 304         bool 'Large physical address support' if E500
 305         depends on 44x || E500
 306         select RESOURCES_64BIT
 307         default y if 44x
 308         ---help---
 309           This option enables kernel support for larger than 32-bit physical
 310           addresses.  This features is not be available on all e500 cores.
 311
 312           If in doubt, say N here.
 313
 314 config ALTIVEC
 315         bool "AltiVec Support"
 316         depends on CLASSIC32 || POWER4
 317         ---help---
 318           This option enables kernel support for the Altivec extensions to the
 319           PowerPC processor. The kernel currently supports saving and restoring
 320           altivec registers, and turning on the 'altivec enable' bit so user
 321           processes can execute altivec instructions.
 322
 323           This option is only usefully if you have a processor that supports
 324           altivec (G4, otherwise known as 74xx series), but does not have
 325           any affect on a non-altivec cpu (it does, however add code to the
 326           kernel).
 327
 328           If in doubt, say Y here.
 329
 330 config SPE
 331         bool "SPE Support"
 332         depends on E200 || E500
 333         default y
 334         ---help---
 335           This option enables kernel support for the Signal Processing
 336           Extensions (SPE) to the PowerPC processor. The kernel currently
 337           supports saving and restoring SPE registers, and turning on the
 338           'spe enable' bit so user processes can execute SPE instructions.
 339
 340           This option is only useful if you have a processor that supports
 341           SPE (e500, otherwise known as 85xx series), but does not have any
 342           effect on a non-spe cpu (it does, however add code to the kernel).
 343
 344           If in doubt, say Y here.
 345
 346 config PPC_STD_MMU
 347         bool
 348         depends on 6xx || POWER3 || POWER4 || PPC64
 349         default y
 350
 351 config PPC_STD_MMU_32
 352         def_bool y
 353         depends on PPC_STD_MMU && PPC32
 354
 355 config PPC_MM_SLICES
 356         bool
 357         default y if HUGETLB_PAGE
 358         default n
 359
 360 config VIRT_CPU_ACCOUNTING
 361         bool "Deterministic task and CPU time accounting"
 362         depends on PPC64
 363         default y
 364         help
 365           Select this option to enable more accurate task and CPU time
 366           accounting.  This is done by reading a CPU counter on each
 367           kernel entry and exit and on transitions within the kernel
 368           between system, softirq and hardirq state, so there is a
 369           small performance impact.  This also enables accounting of
 370           stolen time on logically-partitioned systems running on
 371           IBM POWER5-based machines.
 372
 373           If in doubt, say Y here.
 374
 375 config SMP
 376         depends on PPC_STD_MMU
 377         bool "Symmetric multi-processing support"
 378         ---help---
 379           This enables support for systems with more than one CPU. If you have
 380           a system with only one CPU, say N. If you have a system with more
 381           than one CPU, say Y.  Note that the kernel does not currently
 382           support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
 383           since they have inadequate hardware support for multiprocessor
 384           operation.
 385
 386           If you say N here, the kernel will run on single and multiprocessor
 387           machines, but will use only one CPU of a multiprocessor machine. If
 388           you say Y here, the kernel will run on single-processor machines.
 389           On a single-processor machine, the kernel will run faster if you say
 390           N here.
 391
 392           If you don't know what to do here, say N.
 393
 394 config NR_CPUS
 395         int "Maximum number of CPUs (2-128)"
 396         range 2 128
 397         depends on SMP
 398         default "32" if PPC64
 399         default "4"
 400
 401 config NOT_COHERENT_CACHE
 402         bool
 403         depends on 4xx || 8xx || E200
 404         default y
 405 endmenu
 406
 407 source "init/Kconfig"
 408
 409 source "arch/powerpc/platforms/Kconfig"
 410
 411 menu "Kernel options"
 412
 413 config HIGHMEM
 414         bool "High memory support"
 415         depends on PPC32
 416
 417 source kernel/Kconfig.hz
 418 source kernel/Kconfig.preempt
 419 source "fs/Kconfig.binfmt"
 420
 421 # We optimistically allocate largepages from the VM, so make the limit
 422 # large enough (16MB). This badly named config option is actually
 423 # max order + 1
 424 config FORCE_MAX_ZONEORDER
 425         int
 426         depends on PPC64
 427         default "9" if PPC_64K_PAGES
 428         default "13"
 429
 430 config MATH_EMULATION
 431         bool "Math emulation"
 432         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 433         ---help---
 434           Some PowerPC chips designed for embedded applications do not have
 435           a floating-point unit and therefore do not implement the
 436           floating-point instructions in the PowerPC instruction set.  If you
 437           say Y here, the kernel will include code to emulate a floating-point
 438           unit, which will allow programs that use floating-point
 439           instructions to run.
 440
 441 config IOMMU_VMERGE
 442         bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
 443         depends on EXPERIMENTAL && PPC64
 444         default n
 445         help
 446           Cause IO segments sent to a device for DMA to be merged virtually
 447           by the IOMMU when they happen to have been allocated contiguously.
 448           This doesn't add pressure to the IOMMU allocator. However, some
 449           drivers don't support getting large merged segments coming back
 450           from *_map_sg(). Say Y if you know the drivers you are using are
 451           properly handling this case.
 452
 453 config HOTPLUG_CPU
 454         bool "Support for enabling/disabling CPUs"
 455         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 456         ---help---
 457           Say Y here to be able to disable and re-enable individual
 458           CPUs at runtime on SMP machines.
 459
 460           Say N if you are unsure.
 461
 462 config ARCH_ENABLE_MEMORY_HOTPLUG
 463         def_bool y
 464
 465 config KEXEC
 466         bool "kexec system call (EXPERIMENTAL)"
 467         depends on PPC_MULTIPLATFORM && EXPERIMENTAL
 468         help
 469           kexec is a system call that implements the ability to shutdown your
 470           current kernel, and to start another kernel.  It is like a reboot
 471           but it is independent of the system firmware.   And like a reboot
 472           you can start any kernel with it, not just Linux.
 473
 474           The name comes from the similarity to the exec system call.
 475
 476           It is an ongoing process to be certain the hardware in a machine
 477           is properly shutdown, so do not be surprised if this code does not
 478           initially work for you.  It may help to enable device hotplugging
 479           support.  As of this writing the exact hardware interface is
 480           strongly in flux, so no good recommendation can be made.
 481
 482 config CRASH_DUMP
 483         bool "Build a kdump crash kernel (EXPERIMENTAL)"
 484         depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
 485         help
 486           Build a kernel suitable for use as a kdump capture kernel.
 487           The kernel will be linked at a different address than normal, and
 488           so can only be used for Kdump.
 489
 490           Don't change this unless you know what you are doing.
 491
 492 config PPCBUG_NVRAM
 493         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 494         default y if PPC_PREP
 495
 496 config IRQ_ALL_CPUS
 497         bool "Distribute interrupts on all CPUs by default"
 498         depends on SMP && !MV64360
 499         help
 500           This option gives the kernel permission to distribute IRQs across
 501           multiple CPUs.  Saying N here will route all IRQs to the first
 502           CPU.  Generally saying Y is safe, although some problems have been
 503           reported with SMP Power Macintoshes with this option enabled.
 504
 505 config NUMA
 506         bool "NUMA support"
 507         depends on PPC64
 508         default y if SMP && PPC_PSERIES
 509
 510 config NODES_SHIFT
 511         int
 512         default "4"
 513         depends on NEED_MULTIPLE_NODES
 514
 515 config ARCH_SELECT_MEMORY_MODEL
 516         def_bool y
 517         depends on PPC64
 518
 519 config ARCH_FLATMEM_ENABLE
 520         def_bool y
 521         depends on (PPC64 && !NUMA) || PPC32
 522
 523 config ARCH_SPARSEMEM_ENABLE
 524         def_bool y
 525         depends on PPC64
 526
 527 config ARCH_SPARSEMEM_DEFAULT
 528         def_bool y
 529         depends on (SMP && PPC_PSERIES) || PPC_PS3
 530
 531 config ARCH_POPULATES_NODE_MAP
 532         def_bool y
 533
 534 source "mm/Kconfig"
 535
 536 config ARCH_MEMORY_PROBE
 537         def_bool y
 538         depends on MEMORY_HOTPLUG
 539
 540 # Some NUMA nodes have memory ranges that span
 541 # other nodes.  Even though a pfn is valid and
 542 # between a node's start and end pfns, it may not
 543 # reside on that node.  See memmap_init_zone()
 544 # for details.
 545 config NODES_SPAN_OTHER_NODES
 546         def_bool y
 547         depends on NEED_MULTIPLE_NODES
 548
 549 config PPC_64K_PAGES
 550         bool "64k page size"
 551         depends on PPC64
 552         help
 553           This option changes the kernel logical page size to 64k. On machines
 554           without processor support for 64k pages, the kernel will simulate
 555           them by loading each individual 4k page on demand transparently,
 556           while on hardware with such support, it will be used to map
 557           normal application pages.
 558
 559 config SCHED_SMT
 560         bool "SMT (Hyperthreading) scheduler support"
 561         depends on PPC64 && SMP
 562         help
 563           SMT scheduler support improves the CPU scheduler's decision making
 564           when dealing with POWER5 cpus at a cost of slightly increased
 565           overhead in some places. If unsure say N here.
 566
 567 config PROC_DEVICETREE
 568         bool "Support for device tree in /proc"
 569         depends on PROC_FS
 570         help
 571           This option adds a device-tree directory under /proc which contains
 572           an image of the device tree that the kernel copies from Open
 573           Firmware or other boot firmware. If unsure, say Y here.
 574
 575 config CMDLINE_BOOL
 576         bool "Default bootloader kernel arguments"
 577
 578 config CMDLINE
 579         string "Initial kernel command string"
 580         depends on CMDLINE_BOOL
 581         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 582         help
 583           On some platforms, there is currently no way for the boot loader to
 584           pass arguments to the kernel. For these platforms, you can supply
 585           some command-line options at build time by entering them here.  In
 586           most cases you will need to specify the root device here.
 587
 588 if !44x || BROKEN
 589 source kernel/power/Kconfig
 590 endif
 591
 592 config SECCOMP
 593         bool "Enable seccomp to safely compute untrusted bytecode"
 594         depends on PROC_FS
 595         default y
 596         help
 597           This kernel feature is useful for number crunching applications
 598           that may need to compute untrusted bytecode during their
 599           execution. By using pipes or other transports made available to
 600           the process as file descriptors supporting the read/write
 601           syscalls, it's possible to isolate those applications in
 602           their own address space using seccomp. Once seccomp is
 603           enabled via /proc/<pid>/seccomp, it cannot be disabled
 604           and the task is only allowed to execute a few safe syscalls
 605           defined by each seccomp mode.
 606
 607           If unsure, say Y. Only embedded should say N here.
 608
 609 config WANT_DEVICE_TREE
 610         bool
 611         default n
 612
 613 config DEVICE_TREE
 614         string "Static device tree source file"
 615         depends on WANT_DEVICE_TREE
 616         help
 617           This specifies the device tree source (.dts) file to be
 618           compiled and included when building the bootwrapper.  If a
 619           relative filename is given, then it will be relative to
 620           arch/powerpc/boot/dts.  If you are not using the bootwrapper,
 621           or do not need to build a dts into the bootwrapper, this
 622           field is ignored.
 623
 624           For example, this is required when building a cuImage target
 625           for an older U-Boot, which cannot pass a device tree itself.
 626           Such a kernel will not work with a newer U-Boot that tries to
 627           pass a device tree (unless you tell it not to).  If your U-Boot
 628           does not mention a device tree in "help bootm", then use the
 629           cuImage target and specify a device tree here.  Otherwise, use
 630           the uImage target and leave this field blank.
 631
 632 endmenu
 633
 634 config ISA_DMA_API
 635         bool
 636         default y
 637
 638 menu "Bus options"
 639
 640 config ISA
 641         bool "Support for ISA-bus hardware"
 642         depends on PPC_PREP || PPC_CHRP
 643         select PPC_I8259
 644         help
 645           Find out whether you have ISA slots on your motherboard.  ISA is the
 646           name of a bus system, i.e. the way the CPU talks to the other stuff
 647           inside your box.  If you have an Apple machine, say N here; if you
 648           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 649           you have an embedded board, consult your board documentation.
 650
 651 config ZONE_DMA
 652         bool
 653         default y
 654
 655 config GENERIC_ISA_DMA
 656         bool
 657         depends on PPC64 || POWER4 || 6xx && !CPM2
 658         default y
 659
 660 config PPC_INDIRECT_PCI
 661         bool
 662         depends on PCI
 663         default y if 40x || 44x
 664         default n
 665
 666 config PPC_INDIRECT_PCI_BE
 667         bool
 668         depends PPC_INDIRECT_PCI
 669         default n
 670
 671 config EISA
 672         bool
 673
 674 config SBUS
 675         bool
 676
 677 config FSL_SOC
 678         bool
 679
 680 config FSL_PCIE
 681         bool
 682         depends on PPC_86xx
 683
 684 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 685 config MCA
 686         bool
 687
 688 config PCI
 689         bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
 690                 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
 691                 || MPC7448HPC2 || PPC_PS3 || PPC_HOLLY
 692         default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
 693                 && !PPC_85xx && !PPC_86xx
 694         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
 695         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 696         select ARCH_SUPPORTS_MSI
 697         help
 698           Find out whether your system includes a PCI bus. PCI is the name of
 699           a bus system, i.e. the way the CPU talks to the other stuff inside
 700           your box.  If you say Y here, the kernel will include drivers and
 701           infrastructure code to support PCI bus devices.
 702
 703 config PCI_DOMAINS
 704         bool
 705         default PCI
 706
 707 config PCI_QSPAN
 708         bool "QSpan PCI"
 709         depends on !4xx && !CPM2 && 8xx
 710         select PPC_I8259
 711         help
 712           Say Y here if you have a system based on a Motorola 8xx-series
 713           embedded processor with a QSPAN PCI interface, otherwise say N.
 714
 715 config PCI_8260
 716         bool
 717         depends on PCI && 8260
 718         select PPC_INDIRECT_PCI
 719         default y
 720
 721 config 8260_PCI9
 722         bool "Enable workaround for MPC826x erratum PCI 9"
 723         depends on PCI_8260 && !ADS8272
 724         default y
 725
 726 choice
 727         prompt "IDMA channel for PCI 9 workaround"
 728         depends on 8260_PCI9
 729
 730 config 8260_PCI9_IDMA1
 731         bool "IDMA1"
 732
 733 config 8260_PCI9_IDMA2
 734         bool "IDMA2"
 735
 736 config 8260_PCI9_IDMA3
 737         bool "IDMA3"
 738
 739 config 8260_PCI9_IDMA4
 740         bool "IDMA4"
 741
 742 endchoice
 743
 744 source "drivers/pci/pcie/Kconfig"
 745
 746 source "drivers/pci/Kconfig"
 747
 748 source "drivers/pcmcia/Kconfig"
 749
 750 source "drivers/pci/hotplug/Kconfig"
 751
 752 endmenu
 753
 754 menu "Advanced setup"
 755         depends on PPC32
 756
 757 config ADVANCED_OPTIONS
 758         bool "Prompt for advanced kernel configuration options"
 759         help
 760           This option will enable prompting for a variety of advanced kernel
 761           configuration options.  These options can cause the kernel to not
 762           work if they are set incorrectly, but can be used to optimize certain
 763           aspects of kernel memory management.
 764
 765           Unless you know what you are doing, say N here.
 766
 767 comment "Default settings for advanced configuration options are used"
 768         depends on !ADVANCED_OPTIONS
 769
 770 config HIGHMEM_START_BOOL
 771         bool "Set high memory pool address"
 772         depends on ADVANCED_OPTIONS && HIGHMEM
 773         help
 774           This option allows you to set the base address of the kernel virtual
 775           area used to map high memory pages.  This can be useful in
 776           optimizing the layout of kernel virtual memory.
 777
 778           Say N here unless you know what you are doing.
 779
 780 config HIGHMEM_START
 781         hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
 782         default "0xfe000000"
 783
 784 config LOWMEM_SIZE_BOOL
 785         bool "Set maximum low memory"
 786         depends on ADVANCED_OPTIONS
 787         help
 788           This option allows you to set the maximum amount of memory which
 789           will be used as "low memory", that is, memory which the kernel can
 790           access directly, without having to set up a kernel virtual mapping.
 791           This can be useful in optimizing the layout of kernel virtual
 792           memory.
 793
 794           Say N here unless you know what you are doing.
 795
 796 config LOWMEM_SIZE
 797         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 798         default "0x30000000"
 799
 800 config KERNEL_START_BOOL
 801         bool "Set custom kernel base address"
 802         depends on ADVANCED_OPTIONS
 803         help
 804           This option allows you to set the kernel virtual address at which
 805           the kernel will map low memory (the kernel image will be linked at
 806           this address).  This can be useful in optimizing the virtual memory
 807           layout of the system.
 808
 809           Say N here unless you know what you are doing.
 810
 811 config KERNEL_START
 812         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 813         default "0xc0000000"
 814
 815 config TASK_SIZE_BOOL
 816         bool "Set custom user task size"
 817         depends on ADVANCED_OPTIONS
 818         help
 819           This option allows you to set the amount of virtual address space
 820           allocated to user tasks.  This can be useful in optimizing the
 821           virtual memory layout of the system.
 822
 823           Say N here unless you know what you are doing.
 824
 825 config TASK_SIZE
 826         hex "Size of user task space" if TASK_SIZE_BOOL
 827         default "0x80000000"
 828
 829 config CONSISTENT_START_BOOL
 830         bool "Set custom consistent memory pool address"
 831         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 832         help
 833           This option allows you to set the base virtual address
 834           of the consistent memory pool.  This pool of virtual
 835           memory is used to make consistent memory allocations.
 836
 837 config CONSISTENT_START
 838         hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
 839         default "0xff100000" if NOT_COHERENT_CACHE
 840
 841 config CONSISTENT_SIZE_BOOL
 842         bool "Set custom consistent memory pool size"
 843         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 844         help
 845           This option allows you to set the size of the
 846           consistent memory pool.  This pool of virtual memory
 847           is used to make consistent memory allocations.
 848
 849 config CONSISTENT_SIZE
 850         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
 851         default "0x00200000" if NOT_COHERENT_CACHE
 852
 853 config BOOT_LOAD_BOOL
 854         bool "Set the boot link/load address"
 855         depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
 856         help
 857           This option allows you to set the initial load address of the zImage
 858           or zImage.initrd file.  This can be useful if you are on a board
 859           which has a small amount of memory.
 860
 861           Say N here unless you know what you are doing.
 862
 863 config BOOT_LOAD
 864         hex "Link/load address for booting" if BOOT_LOAD_BOOL
 865         default "0x00400000" if 40x || 8xx || 8260
 866         default "0x01000000" if 44x
 867         default "0x00800000"
 868
 869 config PIN_TLB
 870         bool "Pinned Kernel TLBs (860 ONLY)"
 871         depends on ADVANCED_OPTIONS && 8xx
 872 endmenu
 873
 874 if PPC64
 875 config KERNEL_START
 876         hex
 877         default "0xc000000000000000"
 878 endif
 879
 880 source "net/Kconfig"
 881
 882 source "drivers/Kconfig"
 883
 884 source "fs/Kconfig"
 885
 886 # XXX source "arch/ppc/8xx_io/Kconfig"
 887
 888 # XXX source "arch/ppc/8260_io/Kconfig"
 889
 890 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 891
 892 source "lib/Kconfig"
 893
 894 menu "Instrumentation Support"
 895         depends on EXPERIMENTAL
 896
 897 source "arch/powerpc/oprofile/Kconfig"
 898
 899 config KPROBES
 900         bool "Kprobes (EXPERIMENTAL)"
 901         depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES
 902         help
 903           Kprobes allows you to trap at almost any kernel address and
 904           execute a callback function.  register_kprobe() establishes
 905           a probepoint and specifies the callback.  Kprobes is useful
 906           for kernel debugging, non-intrusive instrumentation and testing.
 907           If in doubt, say "N".
 908 endmenu
 909
 910 source "arch/powerpc/Kconfig.debug"
 911
 912 source "security/Kconfig"
 913
 914 config KEYS_COMPAT
 915         bool
 916         depends on COMPAT && KEYS
 917         default y
 918
 919 source "crypto/Kconfig"