arch/powerpc/Kconfig

   1 # For a description of the syntax of this configuration file,
   2 # see Documentation/kbuild/kconfig-language.txt.
   3 #
   4
   5 mainmenu "Linux/PowerPC Kernel Configuration"
   6
   7 source "arch/powerpc/platforms/Kconfig.cputype"
   8
   9 config PPC32
  10         bool
  11         default y if !PPC64
  12
  13 config 64BIT
  14         bool
  15         default y if PPC64
  16
  17 config WORD_SIZE
  18         int
  19         default 64 if PPC64
  20         default 32 if !PPC64
  21
  22 config ARCH_PHYS_ADDR_T_64BIT
  23        def_bool PPC64 || PHYS_64BIT
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config GENERIC_CMOS_UPDATE
  30         def_bool y
  31
  32 config GENERIC_TIME
  33         def_bool y
  34
  35 config GENERIC_TIME_VSYSCALL
  36         def_bool y
  37
  38 config GENERIC_CLOCKEVENTS
  39         def_bool y
  40
  41 config GENERIC_HARDIRQS
  42         bool
  43         default y
  44
  45 config HAVE_SETUP_PER_CPU_AREA
  46         def_bool PPC64
  47
  48 config IRQ_PER_CPU
  49         bool
  50         default y
  51
  52 config STACKTRACE_SUPPORT
  53         bool
  54         default y
  55
  56 config HAVE_LATENCYTOP_SUPPORT
  57         def_bool y
  58
  59 config TRACE_IRQFLAGS_SUPPORT
  60         bool
  61         depends on PPC64
  62         default y
  63
  64 config LOCKDEP_SUPPORT
  65         bool
  66         default y
  67
  68 config RWSEM_GENERIC_SPINLOCK
  69         bool
  70
  71 config RWSEM_XCHGADD_ALGORITHM
  72         bool
  73         default y
  74
  75 config GENERIC_LOCKBREAK
  76         bool
  77         default y
  78         depends on SMP && PREEMPT
  79
  80 config ARCH_HAS_ILOG2_U32
  81         bool
  82         default y
  83
  84 config ARCH_HAS_ILOG2_U64
  85         bool
  86         default y if 64BIT
  87
  88 config GENERIC_HWEIGHT
  89         bool
  90         default y
  91
  92 config GENERIC_CALIBRATE_DELAY
  93         bool
  94         default y
  95
  96 config GENERIC_FIND_NEXT_BIT
  97         bool
  98         default y
  99
 100 config GENERIC_GPIO
 101         bool
 102         help
 103           Generic GPIO API support
 104
 105 config ARCH_NO_VIRT_TO_BUS
 106         def_bool PPC64
 107
 108 config PPC
 109         bool
 110         default y
 111         select HAVE_FTRACE_MCOUNT_RECORD
 112         select HAVE_DYNAMIC_FTRACE
 113         select HAVE_FUNCTION_TRACER
 114         select HAVE_FUNCTION_GRAPH_TRACER
 115         select ARCH_WANT_OPTIONAL_GPIOLIB
 116         select HAVE_IDE
 117         select HAVE_IOREMAP_PROT
 118         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 119         select HAVE_KPROBES
 120         select HAVE_ARCH_KGDB
 121         select HAVE_KRETPROBES
 122         select HAVE_ARCH_TRACEHOOK
 123         select HAVE_LMB
 124         select HAVE_DMA_ATTRS if PPC64
 125         select USE_GENERIC_SMP_HELPERS if SMP
 126         select HAVE_OPROFILE
 127         select HAVE_SYSCALL_WRAPPERS if PPC64
 128
 129 config EARLY_PRINTK
 130         bool
 131         default y
 132
 133 config COMPAT
 134         bool
 135         default y if PPC64
 136         select COMPAT_BINFMT_ELF
 137
 138 config SYSVIPC_COMPAT
 139         bool
 140         depends on COMPAT && SYSVIPC
 141         default y
 142
 143 # All PPC32s use generic nvram driver through ppc_md
 144 config GENERIC_NVRAM
 145         bool
 146         default y if PPC32
 147
 148 config SCHED_OMIT_FRAME_POINTER
 149         bool
 150         default y
 151
 152 config ARCH_MAY_HAVE_PC_FDC
 153         bool
 154         default !PPC_PSERIES || PCI
 155
 156 config PPC_OF
 157         def_bool y
 158
 159 config OF
 160         def_bool y
 161
 162 config PPC_UDBG_16550
 163         bool
 164         default n
 165
 166 config GENERIC_TBSYNC
 167         bool
 168         default y if PPC32 && SMP
 169         default n
 170
 171 config AUDIT_ARCH
 172         bool
 173         default y
 174
 175 config GENERIC_BUG
 176         bool
 177         default y
 178         depends on BUG
 179
 180 config SYS_SUPPORTS_APM_EMULATION
 181         default y if PMAC_APM_EMU
 182         bool
 183
 184 config DTC
 185        bool
 186        default y
 187
 188 config DEFAULT_UIMAGE
 189         bool
 190         help
 191           Used to allow a board to specify it wants a uImage built by default
 192         default n
 193
 194 config REDBOOT
 195         bool
 196
 197 config HIBERNATE_32
 198         bool
 199         depends on (PPC_PMAC && !SMP) || BROKEN
 200         default y
 201
 202 config HIBERNATE_64
 203         bool
 204         depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
 205         default y
 206
 207 config ARCH_HIBERNATION_POSSIBLE
 208         bool
 209         depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
 210         default y
 211
 212 config ARCH_SUSPEND_POSSIBLE
 213         def_bool y
 214         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
 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 source "init/Kconfig"
 239
 240 source "kernel/Kconfig.freezer"
 241
 242 source "arch/powerpc/sysdev/Kconfig"
 243 source "arch/powerpc/platforms/Kconfig"
 244
 245 menu "Kernel options"
 246
 247 config HIGHMEM
 248         bool "High memory support"
 249         depends on PPC32
 250
 251 source kernel/time/Kconfig
 252 source kernel/Kconfig.hz
 253 source kernel/Kconfig.preempt
 254 source "fs/Kconfig.binfmt"
 255
 256 config HUGETLB_PAGE_SIZE_VARIABLE
 257         bool
 258         depends on HUGETLB_PAGE
 259         default y
 260
 261 config MATH_EMULATION
 262         bool "Math emulation"
 263         depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
 264         ---help---
 265           Some PowerPC chips designed for embedded applications do not have
 266           a floating-point unit and therefore do not implement the
 267           floating-point instructions in the PowerPC instruction set.  If you
 268           say Y here, the kernel will include code to emulate a floating-point
 269           unit, which will allow programs that use floating-point
 270           instructions to run.
 271
 272 config 8XX_MINIMAL_FPEMU
 273         bool "Minimal math emulation for 8xx"
 274         depends on 8xx && !MATH_EMULATION
 275         help
 276           Older arch/ppc kernels still emulated a few floating point
 277           instructions such as load and store, even when full math
 278           emulation is disabled.  Say "Y" here if you want to preserve
 279           this behavior.
 280
 281           It is recommended that you build a soft-float userspace instead.
 282
 283 config IOMMU_VMERGE
 284         bool "Enable IOMMU virtual merging"
 285         depends on PPC64
 286         default y
 287         help
 288           Cause IO segments sent to a device for DMA to be merged virtually
 289           by the IOMMU when they happen to have been allocated contiguously.
 290           This doesn't add pressure to the IOMMU allocator. However, some
 291           drivers don't support getting large merged segments coming back
 292           from *_map_sg().
 293
 294           Most drivers don't have this problem; it is safe to say Y here.
 295
 296 config IOMMU_HELPER
 297         def_bool PPC64
 298
 299 config PPC_NEED_DMA_SYNC_OPS
 300         def_bool y
 301         depends on NOT_COHERENT_CACHE
 302
 303 config HOTPLUG_CPU
 304         bool "Support for enabling/disabling CPUs"
 305         depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 306         ---help---
 307           Say Y here to be able to disable and re-enable individual
 308           CPUs at runtime on SMP machines.
 309
 310           Say N if you are unsure.
 311
 312 config ARCH_ENABLE_MEMORY_HOTPLUG
 313         def_bool y
 314
 315 config ARCH_HAS_WALK_MEMORY
 316         def_bool y
 317
 318 config ARCH_ENABLE_MEMORY_HOTREMOVE
 319         def_bool y
 320
 321 config KEXEC
 322         bool "kexec system call (EXPERIMENTAL)"
 323         depends on PPC_BOOK3S && EXPERIMENTAL
 324         help
 325           kexec is a system call that implements the ability to shutdown your
 326           current kernel, and to start another kernel.  It is like a reboot
 327           but it is independent of the system firmware.   And like a reboot
 328           you can start any kernel with it, not just Linux.
 329
 330           The name comes from the similarity to the exec system call.
 331
 332           It is an ongoing process to be certain the hardware in a machine
 333           is properly shutdown, so do not be surprised if this code does not
 334           initially work for you.  It may help to enable device hotplugging
 335           support.  As of this writing the exact hardware interface is
 336           strongly in flux, so no good recommendation can be made.
 337
 338 config CRASH_DUMP
 339         bool "Build a kdump crash kernel"
 340         depends on PPC64 || 6xx
 341         select RELOCATABLE if PPC64
 342         help
 343           Build a kernel suitable for use as a kdump capture kernel.
 344           The same kernel binary can be used as production kernel and dump
 345           capture kernel.
 346
 347 config PHYP_DUMP
 348         bool "Hypervisor-assisted dump (EXPERIMENTAL)"
 349         depends on PPC_PSERIES && EXPERIMENTAL
 350         help
 351           Hypervisor-assisted dump is meant to be a kdump replacement
 352           offering robustness and speed not possible without system
 353           hypervisor assistance.
 354
 355           If unsure, say "N"
 356
 357 config PPCBUG_NVRAM
 358         bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
 359         default y if PPC_PREP
 360
 361 config IRQ_ALL_CPUS
 362         bool "Distribute interrupts on all CPUs by default"
 363         depends on SMP && !MV64360
 364         help
 365           This option gives the kernel permission to distribute IRQs across
 366           multiple CPUs.  Saying N here will route all IRQs to the first
 367           CPU.  Generally saying Y is safe, although some problems have been
 368           reported with SMP Power Macintoshes with this option enabled.
 369
 370 config NUMA
 371         bool "NUMA support"
 372         depends on PPC64
 373         default y if SMP && PPC_PSERIES
 374
 375 config NODES_SHIFT
 376         int
 377         default "4"
 378         depends on NEED_MULTIPLE_NODES
 379
 380 config ARCH_SELECT_MEMORY_MODEL
 381         def_bool y
 382         depends on PPC64
 383
 384 config ARCH_FLATMEM_ENABLE
 385         def_bool y
 386         depends on (PPC64 && !NUMA) || PPC32
 387
 388 config ARCH_SPARSEMEM_ENABLE
 389         def_bool y
 390         depends on PPC64
 391         select SPARSEMEM_VMEMMAP_ENABLE
 392
 393 config ARCH_SPARSEMEM_DEFAULT
 394         def_bool y
 395         depends on (SMP && PPC_PSERIES) || PPC_PS3
 396
 397 config ARCH_POPULATES_NODE_MAP
 398         def_bool y
 399
 400 source "mm/Kconfig"
 401
 402 config ARCH_MEMORY_PROBE
 403         def_bool y
 404         depends on MEMORY_HOTPLUG
 405
 406 # Some NUMA nodes have memory ranges that span
 407 # other nodes.  Even though a pfn is valid and
 408 # between a node's start and end pfns, it may not
 409 # reside on that node.  See memmap_init_zone()
 410 # for details.
 411 config NODES_SPAN_OTHER_NODES
 412         def_bool y
 413         depends on NEED_MULTIPLE_NODES
 414
 415 config PPC_HAS_HASH_64K
 416         bool
 417         depends on PPC64
 418         default n
 419
 420 config STDBINUTILS
 421         bool "Using standard binutils settings"
 422         depends on 44x
 423         default y
 424         help
 425           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 426           Note, that kernel will be able to run only those applications,
 427           which had been compiled using binutils later than 2.17.50.0.3 with
 428           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 429           the older binutils, you can patch them with a trivial patch, which
 430           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 431
 432 choice
 433         prompt "Page size"
 434         default PPC_4K_PAGES
 435         help
 436           Select the kernel logical page size. Increasing the page size
 437           will reduce software overhead at each page boundary, allow
 438           hardware prefetch mechanisms to be more effective, and allow
 439           larger dma transfers increasing IO efficiency and reducing
 440           overhead. However the utilization of memory will increase.
 441           For example, each cached file will using a multiple of the
 442           page size to hold its contents and the difference between the
 443           end of file and the end of page is wasted.
 444
 445           Some dedicated systems, such as software raid serving with
 446           accelerated calculations, have shown significant increases.
 447
 448           If you configure a 64 bit kernel for 64k pages but the
 449           processor does not support them, then the kernel will simulate
 450           them with 4k pages, loading them on demand, but with the
 451           reduced software overhead and larger internal fragmentation.
 452           For the 32 bit kernel, a large page option will not be offered
 453           unless it is supported by the configured processor.
 454
 455           If unsure, choose 4K_PAGES.
 456
 457 config PPC_4K_PAGES
 458         bool "4k page size"
 459
 460 config PPC_16K_PAGES
 461         bool "16k page size" if 44x
 462
 463 config PPC_64K_PAGES
 464         bool "64k page size" if 44x || PPC_STD_MMU_64
 465         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 466
 467 config PPC_256K_PAGES
 468         bool "256k page size" if 44x
 469         depends on !STDBINUTILS
 470         help
 471           Make the page size 256k.
 472
 473           As the ELF standard only requires alignment to support page
 474           sizes up to 64k, you will need to compile all of your user
 475           space applications with a non-standard binutils settings
 476           (see the STDBINUTILS description for details).
 477
 478           Say N unless you know what you are doing.
 479
 480 endchoice
 481
 482 config FORCE_MAX_ZONEORDER
 483         int "Maximum zone order"
 484         range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
 485         default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
 486         range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
 487         default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
 488         range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
 489         default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
 490         range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
 491         default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
 492         range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
 493         default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
 494         range 11 64
 495         default "11"
 496         help
 497           The kernel memory allocator divides physically contiguous memory
 498           blocks into "zones", where each zone is a power of two number of
 499           pages.  This option selects the largest power of two that the kernel
 500           keeps in the memory allocator.  If you need to allocate very large
 501           blocks of physically contiguous memory, then you may need to
 502           increase this value.
 503
 504           This config option is actually maximum order plus one. For example,
 505           a value of 11 means that the largest free memory block is 2^10 pages.
 506
 507           The page size is not necessarily 4KB.  For example, on 64-bit
 508           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 509           this in mind when choosing a value for this option.
 510
 511 config PPC_SUBPAGE_PROT
 512         bool "Support setting protections for 4k subpages"
 513         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 514         help
 515           This option adds support for a system call to allow user programs
 516           to set access permissions (read/write, readonly, or no access)
 517           on the 4k subpages of each 64k page.
 518
 519 config SCHED_SMT
 520         bool "SMT (Hyperthreading) scheduler support"
 521         depends on PPC64 && SMP
 522         help
 523           SMT scheduler support improves the CPU scheduler's decision making
 524           when dealing with POWER5 cpus at a cost of slightly increased
 525           overhead in some places. If unsure say N here.
 526
 527 config PROC_DEVICETREE
 528         bool "Support for device tree in /proc"
 529         depends on PROC_FS
 530         help
 531           This option adds a device-tree directory under /proc which contains
 532           an image of the device tree that the kernel copies from Open
 533           Firmware or other boot firmware. If unsure, say Y here.
 534
 535 config CMDLINE_BOOL
 536         bool "Default bootloader kernel arguments"
 537
 538 config CMDLINE
 539         string "Initial kernel command string"
 540         depends on CMDLINE_BOOL
 541         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 542         help
 543           On some platforms, there is currently no way for the boot loader to
 544           pass arguments to the kernel. For these platforms, you can supply
 545           some command-line options at build time by entering them here.  In
 546           most cases you will need to specify the root device here.
 547
 548 config EXTRA_TARGETS
 549         string "Additional default image types"
 550         help
 551           List additional targets to be built by the bootwrapper here (separated
 552           by spaces).  This is useful for targets that depend of device tree
 553           files in the .dts directory.
 554
 555           Targets in this list will be build as part of the default build
 556           target, or when the user does a 'make zImage' or a
 557           'make zImage.initrd'.
 558
 559           If unsure, leave blank
 560
 561 if !44x || BROKEN
 562 config ARCH_WANTS_FREEZER_CONTROL
 563         def_bool y
 564         depends on ADB_PMU
 565
 566 source kernel/power/Kconfig
 567 endif
 568
 569 config SECCOMP
 570         bool "Enable seccomp to safely compute untrusted bytecode"
 571         depends on PROC_FS
 572         default y
 573         help
 574           This kernel feature is useful for number crunching applications
 575           that may need to compute untrusted bytecode during their
 576           execution. By using pipes or other transports made available to
 577           the process as file descriptors supporting the read/write
 578           syscalls, it's possible to isolate those applications in
 579           their own address space using seccomp. Once seccomp is
 580           enabled via /proc/<pid>/seccomp, it cannot be disabled
 581           and the task is only allowed to execute a few safe syscalls
 582           defined by each seccomp mode.
 583
 584           If unsure, say Y. Only embedded should say N here.
 585
 586 endmenu
 587
 588 config ISA_DMA_API
 589         bool
 590         default !PPC_ISERIES || PCI
 591
 592 menu "Bus options"
 593
 594 config ISA
 595         bool "Support for ISA-bus hardware"
 596         depends on PPC_PREP || PPC_CHRP
 597         select PPC_I8259
 598         help
 599           Find out whether you have ISA slots on your motherboard.  ISA is the
 600           name of a bus system, i.e. the way the CPU talks to the other stuff
 601           inside your box.  If you have an Apple machine, say N here; if you
 602           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 603           you have an embedded board, consult your board documentation.
 604
 605 config ZONE_DMA
 606         bool
 607         default y
 608
 609 config GENERIC_ISA_DMA
 610         bool
 611         depends on PPC64 || POWER4 || 6xx && !CPM2
 612         default y
 613
 614 config PPC_INDIRECT_PCI
 615         bool
 616         depends on PCI
 617         default y if 40x || 44x
 618         default n
 619
 620 config EISA
 621         bool
 622
 623 config SBUS
 624         bool
 625
 626 config FSL_SOC
 627         bool
 628
 629 config FSL_PCI
 630         bool
 631         select PPC_INDIRECT_PCI
 632         select PCI_QUIRKS
 633
 634 config 4xx_SOC
 635         bool
 636
 637 config FSL_LBC
 638         bool
 639         help
 640           Freescale Localbus support
 641
 642 config FSL_GTM
 643         bool
 644         depends on PPC_83xx || QUICC_ENGINE || CPM2
 645         help
 646           Freescale General-purpose Timers support
 647
 648 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 649 config MCA
 650         bool
 651
 652 # Platforms that what PCI turned unconditionally just do select PCI
 653 # in their config node.  Platforms that want to choose at config
 654 # time should select PPC_PCI_CHOICE
 655 config PPC_PCI_CHOICE
 656         bool
 657
 658 config PCI
 659         bool "PCI support" if PPC_PCI_CHOICE
 660         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 661                 && !PPC_85xx && !PPC_86xx
 662         default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
 663         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 664         select ARCH_SUPPORTS_MSI
 665         help
 666           Find out whether your system includes a PCI bus. PCI is the name of
 667           a bus system, i.e. the way the CPU talks to the other stuff inside
 668           your box.  If you say Y here, the kernel will include drivers and
 669           infrastructure code to support PCI bus devices.
 670
 671 config PCI_DOMAINS
 672         def_bool PCI
 673
 674 config PCI_SYSCALL
 675         def_bool PCI
 676
 677 config PCI_QSPAN
 678         bool "QSpan PCI"
 679         depends on !4xx && !CPM2 && 8xx
 680         select PPC_I8259
 681         help
 682           Say Y here if you have a system based on a Motorola 8xx-series
 683           embedded processor with a QSPAN PCI interface, otherwise say N.
 684
 685 config PCI_8260
 686         bool
 687         depends on PCI && 8260
 688         select PPC_INDIRECT_PCI
 689         default y
 690
 691 config 8260_PCI9
 692         bool "Enable workaround for MPC826x erratum PCI 9"
 693         depends on PCI_8260 && !8272
 694         default y
 695
 696 choice
 697         prompt "IDMA channel for PCI 9 workaround"
 698         depends on 8260_PCI9
 699
 700 config 8260_PCI9_IDMA1
 701         bool "IDMA1"
 702
 703 config 8260_PCI9_IDMA2
 704         bool "IDMA2"
 705
 706 config 8260_PCI9_IDMA3
 707         bool "IDMA3"
 708
 709 config 8260_PCI9_IDMA4
 710         bool "IDMA4"
 711
 712 endchoice
 713
 714 source "drivers/pci/pcie/Kconfig"
 715
 716 source "drivers/pci/Kconfig"
 717
 718 source "drivers/pcmcia/Kconfig"
 719
 720 source "drivers/pci/hotplug/Kconfig"
 721
 722 config HAS_RAPIDIO
 723         bool
 724         default n
 725
 726 config RAPIDIO
 727         bool "RapidIO support"
 728         depends on HAS_RAPIDIO
 729         help
 730           If you say Y here, the kernel will include drivers and
 731           infrastructure code to support RapidIO interconnect devices.
 732
 733 source "drivers/rapidio/Kconfig"
 734
 735 endmenu
 736
 737 menu "Advanced setup"
 738         depends on PPC32
 739
 740 config ADVANCED_OPTIONS
 741         bool "Prompt for advanced kernel configuration options"
 742         help
 743           This option will enable prompting for a variety of advanced kernel
 744           configuration options.  These options can cause the kernel to not
 745           work if they are set incorrectly, but can be used to optimize certain
 746           aspects of kernel memory management.
 747
 748           Unless you know what you are doing, say N here.
 749
 750 comment "Default settings for advanced configuration options are used"
 751         depends on !ADVANCED_OPTIONS
 752
 753 config LOWMEM_SIZE_BOOL
 754         bool "Set maximum low memory"
 755         depends on ADVANCED_OPTIONS
 756         help
 757           This option allows you to set the maximum amount of memory which
 758           will be used as "low memory", that is, memory which the kernel can
 759           access directly, without having to set up a kernel virtual mapping.
 760           This can be useful in optimizing the layout of kernel virtual
 761           memory.
 762
 763           Say N here unless you know what you are doing.
 764
 765 config LOWMEM_SIZE
 766         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 767         default "0x30000000"
 768
 769 config LOWMEM_CAM_NUM_BOOL
 770         bool "Set number of CAMs to use to map low memory"
 771         depends on ADVANCED_OPTIONS && FSL_BOOKE
 772         help
 773           This option allows you to set the maximum number of CAM slots that
 774           will be used to map low memory.  There are a limited number of slots
 775           available and even more limited number that will fit in the L1 MMU.
 776           However, using more entries will allow mapping more low memory.  This
 777           can be useful in optimizing the layout of kernel virtual memory.
 778
 779           Say N here unless you know what you are doing.
 780
 781 config LOWMEM_CAM_NUM
 782         depends on FSL_BOOKE
 783         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 784         default 3
 785
 786 config RELOCATABLE
 787         bool "Build a relocatable kernel (EXPERIMENTAL)"
 788         depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 789         help
 790           This builds a kernel image that is capable of running at the
 791           location the kernel is loaded at (some alignment restrictions may
 792           exist).
 793
 794           One use is for the kexec on panic case where the recovery kernel
 795           must live at a different physical address than the primary
 796           kernel.
 797
 798           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 799           it has been loaded at and the compile time physical addresses
 800           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 801           setting can still be useful to bootwrappers that need to know the
 802           load location of the kernel (eg. u-boot/mkimage).
 803
 804 config PAGE_OFFSET_BOOL
 805         bool "Set custom page offset address"
 806         depends on ADVANCED_OPTIONS
 807         help
 808           This option allows you to set the kernel virtual address at which
 809           the kernel will map low memory.  This can be useful in optimizing
 810           the virtual memory layout of the system.
 811
 812           Say N here unless you know what you are doing.
 813
 814 config PAGE_OFFSET
 815         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 816         default "0xc0000000"
 817
 818 config KERNEL_START_BOOL
 819         bool "Set custom kernel base address"
 820         depends on ADVANCED_OPTIONS
 821         help
 822           This option allows you to set the kernel virtual address at which
 823           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 824           however there are times (like kdump) that one might not want them
 825           to be the same.
 826
 827           Say N here unless you know what you are doing.
 828
 829 config KERNEL_START
 830         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 831         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 832         default "0xc2000000" if CRASH_DUMP
 833         default "0xc0000000"
 834
 835 config PHYSICAL_START_BOOL
 836         bool "Set physical address where the kernel is loaded"
 837         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 838         help
 839           This gives the physical address where the kernel is loaded.
 840
 841           Say N here unless you know what you are doing.
 842
 843 config PHYSICAL_START
 844         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 845         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
 846         default "0x00000000"
 847
 848 config PHYSICAL_ALIGN
 849         hex
 850         default "0x04000000" if FSL_BOOKE
 851         help
 852           This value puts the alignment restrictions on physical address
 853           where kernel is loaded and run from. Kernel is compiled for an
 854           address which meets above alignment restriction.
 855
 856 config TASK_SIZE_BOOL
 857         bool "Set custom user task size"
 858         depends on ADVANCED_OPTIONS
 859         help
 860           This option allows you to set the amount of virtual address space
 861           allocated to user tasks.  This can be useful in optimizing the
 862           virtual memory layout of the system.
 863
 864           Say N here unless you know what you are doing.
 865
 866 config TASK_SIZE
 867         hex "Size of user task space" if TASK_SIZE_BOOL
 868         default "0x80000000" if PPC_PREP || PPC_8xx
 869         default "0xc0000000"
 870
 871 config PIN_TLB
 872         bool "Pinned Kernel TLBs (860 ONLY)"
 873         depends on ADVANCED_OPTIONS && 8xx
 874 endmenu
 875
 876 if PPC64
 877 config RELOCATABLE
 878         bool "Build a relocatable kernel"
 879         help
 880           This builds a kernel image that is capable of running anywhere
 881           in the RMA (real memory area) at any 16k-aligned base address.
 882           The kernel is linked as a position-independent executable (PIE)
 883           and contains dynamic relocations which are processed early
 884           in the bootup process.
 885
 886           One use is for the kexec on panic case where the recovery kernel
 887           must live at a different physical address than the primary
 888           kernel.
 889
 890 config PAGE_OFFSET
 891         hex
 892         default "0xc000000000000000"
 893 config KERNEL_START
 894         hex
 895         default "0xc000000000000000"
 896 config PHYSICAL_START
 897         hex
 898         default "0x00000000"
 899 endif
 900
 901 source "net/Kconfig"
 902
 903 source "drivers/Kconfig"
 904
 905 source "fs/Kconfig"
 906
 907 source "arch/powerpc/sysdev/qe_lib/Kconfig"
 908
 909 source "lib/Kconfig"
 910
 911 source "arch/powerpc/Kconfig.debug"
 912
 913 source "security/Kconfig"
 914
 915 config KEYS_COMPAT
 916         bool
 917         depends on COMPAT && KEYS
 918         default y
 919
 920 source "crypto/Kconfig"
 921
 922 config PPC_CLOCK
 923         bool
 924         default n
 925         select HAVE_CLK
 926
 927 config PPC_LIB_RHEAP
 928         bool
 929
 930 source "arch/powerpc/kvm/Kconfig"