arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select EXPERT
   4         select CLKDEV_LOOKUP
   5         select HAVE_IDE if HAS_IOPORT
   6         select HAVE_MEMBLOCK
   7         select HAVE_MEMBLOCK_NODE_MAP
   8         select ARCH_DISCARD_MEMBLOCK
   9         select HAVE_OPROFILE
  10         select HAVE_GENERIC_DMA_COHERENT
  11         select HAVE_ARCH_TRACEHOOK
  12         select HAVE_DMA_API_DEBUG
  13         select HAVE_DMA_ATTRS
  14         select HAVE_IRQ_WORK
  15         select HAVE_PERF_EVENTS
  16         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  17         select PERF_USE_VMALLOC
  18         select HAVE_KERNEL_GZIP
  19         select HAVE_KERNEL_BZIP2
  20         select HAVE_KERNEL_LZMA
  21         select HAVE_KERNEL_XZ
  22         select HAVE_KERNEL_LZO
  23         select HAVE_SYSCALL_TRACEPOINTS
  24         select HAVE_REGS_AND_STACK_ACCESS_API
  25         select HAVE_GENERIC_HARDIRQS
  26         select MAY_HAVE_SPARSE_IRQ
  27         select IRQ_FORCED_THREADING
  28         select RTC_LIB
  29         select GENERIC_ATOMIC64
  30         select GENERIC_IRQ_SHOW
  31         help
  32           The SuperH is a RISC processor targeted for use in embedded systems
  33           and consumer electronics; it was also used in the Sega Dreamcast
  34           gaming console.  The SuperH port has a home page at
  35           <http://www.linux-sh.org/>.
  36
  37 config SUPERH32
  38         def_bool ARCH = "sh"
  39         select HAVE_KPROBES
  40         select HAVE_KRETPROBES
  41         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  42         select HAVE_FUNCTION_TRACER
  43         select HAVE_FTRACE_MCOUNT_RECORD
  44         select HAVE_DYNAMIC_FTRACE
  45         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  46         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  47         select HAVE_FUNCTION_GRAPH_TRACER
  48         select HAVE_ARCH_KGDB
  49         select HAVE_HW_BREAKPOINT
  50         select HAVE_MIXED_BREAKPOINTS_REGS
  51         select PERF_EVENTS
  52         select ARCH_HIBERNATION_POSSIBLE if MMU
  53         select SPARSE_IRQ
  54
  55 config SUPERH64
  56         def_bool ARCH = "sh64"
  57
  58 config ARCH_DEFCONFIG
  59         string
  60         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  61         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  62
  63 config RWSEM_GENERIC_SPINLOCK
  64         def_bool y
  65
  66 config RWSEM_XCHGADD_ALGORITHM
  67         bool
  68
  69 config GENERIC_BUG
  70         def_bool y
  71         depends on BUG && SUPERH32
  72
  73 config GENERIC_CSUM
  74         def_bool y
  75         depends on SUPERH64
  76
  77 config GENERIC_HWEIGHT
  78         def_bool y
  79
  80 config IRQ_PER_CPU
  81         def_bool y
  82
  83 config GENERIC_GPIO
  84         def_bool n
  85
  86 config GENERIC_CALIBRATE_DELAY
  87         bool
  88
  89 config GENERIC_CLOCKEVENTS
  90         def_bool y
  91
  92 config GENERIC_CLOCKEVENTS_BROADCAST
  93         bool
  94
  95 config GENERIC_CMOS_UPDATE
  96         def_bool y
  97         depends on SH_SH03 || SH_DREAMCAST
  98
  99 config GENERIC_LOCKBREAK
 100         def_bool y
 101         depends on SMP && PREEMPT
 102
 103 config ARCH_SUSPEND_POSSIBLE
 104         def_bool n
 105
 106 config ARCH_HIBERNATION_POSSIBLE
 107         def_bool n
 108
 109 config SYS_SUPPORTS_APM_EMULATION
 110         bool
 111         select ARCH_SUSPEND_POSSIBLE
 112
 113 config SYS_SUPPORTS_HUGETLBFS
 114         bool
 115
 116 config SYS_SUPPORTS_SMP
 117         bool
 118
 119 config SYS_SUPPORTS_NUMA
 120         bool
 121
 122 config SYS_SUPPORTS_PCI
 123         bool
 124
 125 config SYS_SUPPORTS_CMT
 126         bool
 127
 128 config SYS_SUPPORTS_MTU2
 129         bool
 130
 131 config SYS_SUPPORTS_TMU
 132         bool
 133
 134 config STACKTRACE_SUPPORT
 135         def_bool y
 136
 137 config LOCKDEP_SUPPORT
 138         def_bool y
 139
 140 config HAVE_LATENCYTOP_SUPPORT
 141         def_bool y
 142
 143 config ARCH_HAS_ILOG2_U32
 144         def_bool n
 145
 146 config ARCH_HAS_ILOG2_U64
 147         def_bool n
 148
 149 config ARCH_NO_VIRT_TO_BUS
 150         def_bool y
 151
 152 config ARCH_HAS_DEFAULT_IDLE
 153         def_bool y
 154
 155 config ARCH_HAS_CPU_IDLE_WAIT
 156         def_bool y
 157
 158 config NO_IOPORT
 159         def_bool !PCI
 160         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN
 161
 162 config IO_TRAPPED
 163         bool
 164
 165 config SWAP_IO_SPACE
 166         bool
 167
 168 config DMA_COHERENT
 169         bool
 170
 171 config DMA_NONCOHERENT
 172         def_bool !DMA_COHERENT
 173
 174 config NEED_DMA_MAP_STATE
 175         def_bool DMA_NONCOHERENT
 176
 177 config NEED_SG_DMA_LENGTH
 178         def_bool y
 179
 180 source "init/Kconfig"
 181
 182 source "kernel/Kconfig.freezer"
 183
 184 menu "System type"
 185
 186 #
 187 # Processor families
 188 #
 189 config CPU_SH2
 190         bool
 191
 192 config CPU_SH2A
 193         bool
 194         select CPU_SH2
 195         select UNCACHED_MAPPING
 196
 197 config CPU_SH3
 198         bool
 199         select CPU_HAS_INTEVT
 200         select CPU_HAS_SR_RB
 201         select SYS_SUPPORTS_TMU
 202
 203 config CPU_SH4
 204         bool
 205         select CPU_HAS_INTEVT
 206         select CPU_HAS_SR_RB
 207         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 208         select SYS_SUPPORTS_TMU
 209         select SYS_SUPPORTS_HUGETLBFS if MMU
 210
 211 config CPU_SH4A
 212         bool
 213         select CPU_SH4
 214
 215 config CPU_SH4AL_DSP
 216         bool
 217         select CPU_SH4A
 218         select CPU_HAS_DSP
 219
 220 config CPU_SH5
 221         bool
 222         select CPU_HAS_FPU
 223         select SYS_SUPPORTS_TMU
 224         select SYS_SUPPORTS_HUGETLBFS if MMU
 225
 226 config CPU_SHX2
 227         bool
 228
 229 config CPU_SHX3
 230         bool
 231         select DMA_COHERENT
 232         select SYS_SUPPORTS_SMP
 233         select SYS_SUPPORTS_NUMA
 234
 235 config ARCH_SHMOBILE
 236         bool
 237         select ARCH_SUSPEND_POSSIBLE
 238         select PM
 239         select PM_RUNTIME
 240
 241 config CPU_HAS_PMU
 242        depends on CPU_SH4 || CPU_SH4A
 243        default y
 244        bool
 245
 246 if SUPERH32
 247
 248 choice
 249         prompt "Processor sub-type selection"
 250
 251 #
 252 # Processor subtypes
 253 #
 254
 255 # SH-2 Processor Support
 256
 257 config CPU_SUBTYPE_SH7619
 258         bool "Support SH7619 processor"
 259         select CPU_SH2
 260         select SYS_SUPPORTS_CMT
 261
 262 # SH-2A Processor Support
 263
 264 config CPU_SUBTYPE_SH7201
 265         bool "Support SH7201 processor"
 266         select CPU_SH2A
 267         select CPU_HAS_FPU
 268         select SYS_SUPPORTS_MTU2
 269
 270 config CPU_SUBTYPE_SH7203
 271         bool "Support SH7203 processor"
 272         select CPU_SH2A
 273         select CPU_HAS_FPU
 274         select SYS_SUPPORTS_CMT
 275         select SYS_SUPPORTS_MTU2
 276         select ARCH_WANT_OPTIONAL_GPIOLIB
 277
 278 config CPU_SUBTYPE_SH7206
 279         bool "Support SH7206 processor"
 280         select CPU_SH2A
 281         select SYS_SUPPORTS_CMT
 282         select SYS_SUPPORTS_MTU2
 283
 284 config CPU_SUBTYPE_SH7263
 285         bool "Support SH7263 processor"
 286         select CPU_SH2A
 287         select CPU_HAS_FPU
 288         select SYS_SUPPORTS_CMT
 289         select SYS_SUPPORTS_MTU2
 290
 291 config CPU_SUBTYPE_MXG
 292         bool "Support MX-G processor"
 293         select CPU_SH2A
 294         select SYS_SUPPORTS_MTU2
 295         help
 296           Select MX-G if running on an R8A03022BG part.
 297
 298 # SH-3 Processor Support
 299
 300 config CPU_SUBTYPE_SH7705
 301         bool "Support SH7705 processor"
 302         select CPU_SH3
 303
 304 config CPU_SUBTYPE_SH7706
 305         bool "Support SH7706 processor"
 306         select CPU_SH3
 307         help
 308           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 309
 310 config CPU_SUBTYPE_SH7707
 311         bool "Support SH7707 processor"
 312         select CPU_SH3
 313         help
 314           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 315
 316 config CPU_SUBTYPE_SH7708
 317         bool "Support SH7708 processor"
 318         select CPU_SH3
 319         help
 320           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 321           if you have a 100 Mhz SH-3 HD6417708R CPU.
 322
 323 config CPU_SUBTYPE_SH7709
 324         bool "Support SH7709 processor"
 325         select CPU_SH3
 326         help
 327           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 328
 329 config CPU_SUBTYPE_SH7710
 330         bool "Support SH7710 processor"
 331         select CPU_SH3
 332         select CPU_HAS_DSP
 333         help
 334           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 335
 336 config CPU_SUBTYPE_SH7712
 337         bool "Support SH7712 processor"
 338         select CPU_SH3
 339         select CPU_HAS_DSP
 340         help
 341           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 342
 343 config CPU_SUBTYPE_SH7720
 344         bool "Support SH7720 processor"
 345         select CPU_SH3
 346         select CPU_HAS_DSP
 347         select SYS_SUPPORTS_CMT
 348         select ARCH_WANT_OPTIONAL_GPIOLIB
 349         select USB_ARCH_HAS_OHCI
 350         select USB_OHCI_SH if USB_OHCI_HCD
 351         help
 352           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 353
 354 config CPU_SUBTYPE_SH7721
 355         bool "Support SH7721 processor"
 356         select CPU_SH3
 357         select CPU_HAS_DSP
 358         select SYS_SUPPORTS_CMT
 359         select USB_ARCH_HAS_OHCI
 360         select USB_OHCI_SH if USB_OHCI_HCD
 361         help
 362           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 363
 364 # SH-4 Processor Support
 365
 366 config CPU_SUBTYPE_SH7750
 367         bool "Support SH7750 processor"
 368         select CPU_SH4
 369         help
 370           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 371
 372 config CPU_SUBTYPE_SH7091
 373         bool "Support SH7091 processor"
 374         select CPU_SH4
 375         help
 376           Select SH7091 if you have an SH-4 based Sega device (such as
 377           the Dreamcast, Naomi, and Naomi 2).
 378
 379 config CPU_SUBTYPE_SH7750R
 380         bool "Support SH7750R processor"
 381         select CPU_SH4
 382
 383 config CPU_SUBTYPE_SH7750S
 384         bool "Support SH7750S processor"
 385         select CPU_SH4
 386
 387 config CPU_SUBTYPE_SH7751
 388         bool "Support SH7751 processor"
 389         select CPU_SH4
 390         help
 391           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 392           or if you have a HD6417751R CPU.
 393
 394 config CPU_SUBTYPE_SH7751R
 395         bool "Support SH7751R processor"
 396         select CPU_SH4
 397
 398 config CPU_SUBTYPE_SH7760
 399         bool "Support SH7760 processor"
 400         select CPU_SH4
 401
 402 config CPU_SUBTYPE_SH4_202
 403         bool "Support SH4-202 processor"
 404         select CPU_SH4
 405
 406 # SH-4A Processor Support
 407
 408 config CPU_SUBTYPE_SH7723
 409         bool "Support SH7723 processor"
 410         select CPU_SH4A
 411         select CPU_SHX2
 412         select ARCH_SHMOBILE
 413         select ARCH_SPARSEMEM_ENABLE
 414         select SYS_SUPPORTS_CMT
 415         select ARCH_WANT_OPTIONAL_GPIOLIB
 416         help
 417           Select SH7723 if you have an SH-MobileR2 CPU.
 418
 419 config CPU_SUBTYPE_SH7724
 420         bool "Support SH7724 processor"
 421         select CPU_SH4A
 422         select CPU_SHX2
 423         select ARCH_SHMOBILE
 424         select ARCH_SPARSEMEM_ENABLE
 425         select SYS_SUPPORTS_CMT
 426         select ARCH_WANT_OPTIONAL_GPIOLIB
 427         help
 428           Select SH7724 if you have an SH-MobileR2R CPU.
 429
 430 config CPU_SUBTYPE_SH7757
 431         bool "Support SH7757 processor"
 432         select CPU_SH4A
 433         select CPU_SHX2
 434         select ARCH_WANT_OPTIONAL_GPIOLIB
 435         select USB_ARCH_HAS_OHCI
 436         select USB_ARCH_HAS_EHCI
 437         help
 438           Select SH7757 if you have a SH4A SH7757 CPU.
 439
 440 config CPU_SUBTYPE_SH7763
 441         bool "Support SH7763 processor"
 442         select CPU_SH4A
 443         select USB_ARCH_HAS_OHCI
 444         select USB_OHCI_SH if USB_OHCI_HCD
 445         help
 446           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 447
 448 config CPU_SUBTYPE_SH7770
 449         bool "Support SH7770 processor"
 450         select CPU_SH4A
 451
 452 config CPU_SUBTYPE_SH7780
 453         bool "Support SH7780 processor"
 454         select CPU_SH4A
 455
 456 config CPU_SUBTYPE_SH7785
 457         bool "Support SH7785 processor"
 458         select CPU_SH4A
 459         select CPU_SHX2
 460         select ARCH_SPARSEMEM_ENABLE
 461         select SYS_SUPPORTS_NUMA
 462         select ARCH_WANT_OPTIONAL_GPIOLIB
 463
 464 config CPU_SUBTYPE_SH7786
 465         bool "Support SH7786 processor"
 466         select CPU_SH4A
 467         select CPU_SHX3
 468         select CPU_HAS_PTEAEX
 469         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 470         select ARCH_WANT_OPTIONAL_GPIOLIB
 471         select USB_ARCH_HAS_OHCI
 472         select USB_OHCI_SH if USB_OHCI_HCD
 473         select USB_ARCH_HAS_EHCI
 474         select USB_EHCI_SH if USB_EHCI_HCD
 475
 476 config CPU_SUBTYPE_SHX3
 477         bool "Support SH-X3 processor"
 478         select CPU_SH4A
 479         select CPU_SHX3
 480         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 481         select ARCH_REQUIRE_GPIOLIB
 482
 483 # SH4AL-DSP Processor Support
 484
 485 config CPU_SUBTYPE_SH7343
 486         bool "Support SH7343 processor"
 487         select CPU_SH4AL_DSP
 488         select ARCH_SHMOBILE
 489         select SYS_SUPPORTS_CMT
 490
 491 config CPU_SUBTYPE_SH7722
 492         bool "Support SH7722 processor"
 493         select CPU_SH4AL_DSP
 494         select CPU_SHX2
 495         select ARCH_SHMOBILE
 496         select ARCH_SPARSEMEM_ENABLE
 497         select SYS_SUPPORTS_NUMA
 498         select SYS_SUPPORTS_CMT
 499         select ARCH_WANT_OPTIONAL_GPIOLIB
 500
 501 config CPU_SUBTYPE_SH7366
 502         bool "Support SH7366 processor"
 503         select CPU_SH4AL_DSP
 504         select CPU_SHX2
 505         select ARCH_SHMOBILE
 506         select ARCH_SPARSEMEM_ENABLE
 507         select SYS_SUPPORTS_NUMA
 508         select SYS_SUPPORTS_CMT
 509
 510 endchoice
 511
 512 endif
 513
 514 if SUPERH64
 515
 516 choice
 517         prompt "Processor sub-type selection"
 518
 519 # SH-5 Processor Support
 520
 521 config CPU_SUBTYPE_SH5_101
 522         bool "Support SH5-101 processor"
 523         select CPU_SH5
 524
 525 config CPU_SUBTYPE_SH5_103
 526         bool "Support SH5-103 processor"
 527         select CPU_SH5
 528
 529 endchoice
 530
 531 endif
 532
 533 source "arch/sh/mm/Kconfig"
 534
 535 source "arch/sh/Kconfig.cpu"
 536
 537 source "arch/sh/boards/Kconfig"
 538
 539 menu "Timer and clock configuration"
 540
 541 config SH_TIMER_TMU
 542         bool "TMU timer driver"
 543         depends on SYS_SUPPORTS_TMU
 544         default y
 545         help
 546           This enables the build of the TMU timer driver.
 547
 548 config SH_TIMER_CMT
 549         bool "CMT timer driver"
 550         depends on SYS_SUPPORTS_CMT
 551         default y
 552         help
 553           This enables build of the CMT timer driver.
 554
 555 config SH_TIMER_MTU2
 556         bool "MTU2 timer driver"
 557         depends on SYS_SUPPORTS_MTU2
 558         default y
 559         help
 560           This enables build of the MTU2 timer driver.
 561
 562 config SH_PCLK_FREQ
 563         int "Peripheral clock frequency (in Hz)"
 564         depends on SH_CLK_CPG_LEGACY
 565         default "31250000" if CPU_SUBTYPE_SH7619
 566         default "33333333" if CPU_SUBTYPE_SH7770 || \
 567                               CPU_SUBTYPE_SH7760 || \
 568                               CPU_SUBTYPE_SH7705 || \
 569                               CPU_SUBTYPE_SH7203 || \
 570                               CPU_SUBTYPE_SH7206 || \
 571                               CPU_SUBTYPE_SH7263 || \
 572                               CPU_SUBTYPE_MXG
 573         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 574         default "66000000" if CPU_SUBTYPE_SH4_202
 575         default "50000000"
 576         help
 577           This option is used to specify the peripheral clock frequency.
 578           This is necessary for determining the reference clock value on
 579           platforms lacking an RTC.
 580
 581 config SH_CLK_CPG
 582         def_bool y
 583
 584 config SH_CLK_CPG_LEGACY
 585         depends on SH_CLK_CPG
 586         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 587                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757
 588
 589 source "kernel/time/Kconfig"
 590
 591 endmenu
 592
 593 menu "CPU Frequency scaling"
 594
 595 source "drivers/cpufreq/Kconfig"
 596
 597 config SH_CPU_FREQ
 598         tristate "SuperH CPU Frequency driver"
 599         depends on CPU_FREQ
 600         select CPU_FREQ_TABLE
 601         help
 602           This adds the cpufreq driver for SuperH. Any CPU that supports
 603           clock rate rounding through the clock framework can use this
 604           driver. While it will make the kernel slightly larger, this is
 605           harmless for CPUs that don't support rate rounding. The driver
 606           will also generate a notice in the boot log before disabling
 607           itself if the CPU in question is not capable of rate rounding.
 608
 609           For details, take a look at <file:Documentation/cpu-freq>.
 610
 611           If unsure, say N.
 612
 613 endmenu
 614
 615 source "arch/sh/drivers/Kconfig"
 616
 617 endmenu
 618
 619 menu "Kernel features"
 620
 621 source kernel/Kconfig.hz
 622
 623 config KEXEC
 624         bool "kexec system call (EXPERIMENTAL)"
 625         depends on SUPERH32 && EXPERIMENTAL && MMU
 626         help
 627           kexec is a system call that implements the ability to shutdown your
 628           current kernel, and to start another kernel.  It is like a reboot
 629           but it is independent of the system firmware.  And like a reboot
 630           you can start any kernel with it, not just Linux.
 631
 632           The name comes from the similarity to the exec system call.
 633
 634           It is an ongoing process to be certain the hardware in a machine
 635           is properly shutdown, so do not be surprised if this code does not
 636           initially work for you.  It may help to enable device hotplugging
 637           support.  As of this writing the exact hardware interface is
 638           strongly in flux, so no good recommendation can be made.
 639
 640 config CRASH_DUMP
 641         bool "kernel crash dumps (EXPERIMENTAL)"
 642         depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
 643         help
 644           Generate crash dump after being started by kexec.
 645           This should be normally only set in special crash dump kernels
 646           which are loaded in the main kernel with kexec-tools into
 647           a specially reserved region and then later executed after
 648           a crash by kdump/kexec. The crash dump kernel must be compiled
 649           to a memory address not used by the main kernel using
 650           PHYSICAL_START.
 651
 652           For more details see Documentation/kdump/kdump.txt
 653
 654 config KEXEC_JUMP
 655         bool "kexec jump (EXPERIMENTAL)"
 656         depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
 657         help
 658           Jump between original kernel and kexeced kernel and invoke
 659           code via KEXEC
 660
 661 config PHYSICAL_START
 662         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 663         default MEMORY_START
 664         ---help---
 665           This gives the physical address where the kernel is loaded
 666           and is ordinarily the same as MEMORY_START.
 667
 668           Different values are primarily used in the case of kexec on panic
 669           where the fail safe kernel needs to run at a different address
 670           than the panic-ed kernel.
 671
 672 config SECCOMP
 673         bool "Enable seccomp to safely compute untrusted bytecode"
 674         depends on PROC_FS
 675         help
 676           This kernel feature is useful for number crunching applications
 677           that may need to compute untrusted bytecode during their
 678           execution. By using pipes or other transports made available to
 679           the process as file descriptors supporting the read/write
 680           syscalls, it's possible to isolate those applications in
 681           their own address space using seccomp. Once seccomp is
 682           enabled via prctl, it cannot be disabled and the task is only
 683           allowed to execute a few safe syscalls defined by each seccomp
 684           mode.
 685
 686           If unsure, say N.
 687
 688 config SMP
 689         bool "Symmetric multi-processing support"
 690         depends on SYS_SUPPORTS_SMP
 691         select USE_GENERIC_SMP_HELPERS
 692         ---help---
 693           This enables support for systems with more than one CPU. If you have
 694           a system with only one CPU, like most personal computers, say N. If
 695           you have a system with more than one CPU, say Y.
 696
 697           If you say N here, the kernel will run on single and multiprocessor
 698           machines, but will use only one CPU of a multiprocessor machine. If
 699           you say Y here, the kernel will run on many, but not all,
 700           singleprocessor machines. On a singleprocessor machine, the kernel
 701           will run faster if you say N here.
 702
 703           People using multiprocessor machines who say Y here should also say
 704           Y to "Enhanced Real Time Clock Support", below.
 705
 706           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 707           available at <http://www.tldp.org/docs.html#howto>.
 708
 709           If you don't know what to do here, say N.
 710
 711 config NR_CPUS
 712         int "Maximum number of CPUs (2-32)"
 713         range 2 32
 714         depends on SMP
 715         default "4" if CPU_SUBTYPE_SHX3
 716         default "2"
 717         help
 718           This allows you to specify the maximum number of CPUs which this
 719           kernel will support.  The maximum supported value is 32 and the
 720           minimum value which makes sense is 2.
 721
 722           This is purely to save memory - each supported CPU adds
 723           approximately eight kilobytes to the kernel image.
 724
 725 config HOTPLUG_CPU
 726         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 727         depends on SMP && HOTPLUG && EXPERIMENTAL
 728         help
 729           Say Y here to experiment with turning CPUs off and on.  CPUs
 730           can be controlled through /sys/devices/system/cpu.
 731
 732 source "kernel/Kconfig.preempt"
 733
 734 config GUSA
 735         def_bool y
 736         depends on !SMP && SUPERH32
 737         help
 738           This enables support for gUSA (general UserSpace Atomicity).
 739           This is the default implementation for both UP and non-ll/sc
 740           CPUs, and is used by the libc, amongst others.
 741
 742           For additional information, design information can be found
 743           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 744
 745           This should only be disabled for special cases where alternate
 746           atomicity implementations exist.
 747
 748 config GUSA_RB
 749         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 750         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 751         help
 752           Enabling this option will allow the kernel to implement some
 753           atomic operations using a software implementation of load-locked/
 754           store-conditional (LLSC). On machines which do not have hardware
 755           LLSC, this should be more efficient than the other alternative of
 756           disabling interrupts around the atomic sequence.
 757
 758 config HW_PERF_EVENTS
 759         bool "Enable hardware performance counter support for perf events"
 760         depends on PERF_EVENTS && CPU_HAS_PMU
 761         default y
 762         help
 763           Enable hardware performance counter support for perf events. If
 764           disabled, perf events will use software events only.
 765
 766 source "drivers/sh/Kconfig"
 767
 768 endmenu
 769
 770 menu "Boot options"
 771
 772 config ZERO_PAGE_OFFSET
 773         hex
 774         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 775                                 SH_7751_SOLUTION_ENGINE
 776         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 777         default "0x00002000" if PAGE_SIZE_8KB
 778         default "0x00001000"
 779         help
 780           This sets the default offset of zero page.
 781
 782 config BOOT_LINK_OFFSET
 783         hex
 784         default "0x00210000" if SH_SHMIN
 785         default "0x00400000" if SH_CAYMAN
 786         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 787         default "0x009e0000" if SH_TITAN
 788         default "0x01800000" if SH_SDK7780
 789         default "0x02000000" if SH_EDOSK7760
 790         default "0x00800000"
 791         help
 792           This option allows you to set the link address offset of the zImage.
 793           This can be useful if you are on a board which has a small amount of
 794           memory.
 795
 796 config ENTRY_OFFSET
 797         hex
 798         default "0x00001000" if PAGE_SIZE_4KB
 799         default "0x00002000" if PAGE_SIZE_8KB
 800         default "0x00004000" if PAGE_SIZE_16KB
 801         default "0x00010000" if PAGE_SIZE_64KB
 802         default "0x00000000"
 803
 804 config ROMIMAGE_MMCIF
 805         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 806         depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
 807         help
 808           Say Y here to include experimental MMCIF loading code in
 809           romImage. With this enabled it is possible to write the romImage
 810           kernel image to an MMC card and boot the kernel straight from
 811           the reset vector. At reset the processor Mask ROM will load the
 812           first part of the romImage which in turn loads the rest the kernel
 813           image to RAM using the MMCIF hardware block.
 814
 815 choice
 816         prompt "Kernel command line"
 817         optional
 818         default CMDLINE_OVERWRITE
 819         help
 820           Setting this option allows the kernel command line arguments
 821           to be set.
 822
 823 config CMDLINE_OVERWRITE
 824         bool "Overwrite bootloader kernel arguments"
 825         help
 826           Given string will overwrite any arguments passed in by
 827           a bootloader.
 828
 829 config CMDLINE_EXTEND
 830         bool "Extend bootloader kernel arguments"
 831         help
 832           Given string will be concatenated with arguments passed in
 833           by a bootloader.
 834
 835 endchoice
 836
 837 config CMDLINE
 838         string "Kernel command line arguments string"
 839         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 840         default "console=ttySC1,115200"
 841
 842 endmenu
 843
 844 menu "Bus options"
 845
 846 config SUPERHYWAY
 847         tristate "SuperHyway Bus support"
 848         depends on CPU_SUBTYPE_SH4_202
 849
 850 config MAPLE
 851         bool "Maple Bus support"
 852         depends on SH_DREAMCAST
 853         help
 854          The Maple Bus is SEGA's serial communication bus for peripherals
 855          on the Dreamcast. Without this bus support you won't be able to
 856          get your Dreamcast keyboard etc to work, so most users
 857          probably want to say 'Y' here, unless you are only using the
 858          Dreamcast with a serial line terminal or a remote network
 859          connection.
 860
 861 config PCI
 862         bool "PCI support"
 863         depends on SYS_SUPPORTS_PCI
 864         select PCI_DOMAINS
 865         select GENERIC_PCI_IOMAP
 866         select NO_GENERIC_PCI_IOPORT_MAP
 867         help
 868           Find out whether you have a PCI motherboard. PCI is the name of a
 869           bus system, i.e. the way the CPU talks to the other stuff inside
 870           your box. If you have PCI, say Y, otherwise N.
 871
 872 config PCI_DOMAINS
 873         bool
 874
 875 source "drivers/pci/pcie/Kconfig"
 876
 877 source "drivers/pci/Kconfig"
 878
 879 source "drivers/pcmcia/Kconfig"
 880
 881 source "drivers/pci/hotplug/Kconfig"
 882
 883 endmenu
 884
 885 menu "Executable file formats"
 886
 887 source "fs/Kconfig.binfmt"
 888
 889 endmenu
 890
 891 menu "Power management options (EXPERIMENTAL)"
 892 depends on EXPERIMENTAL
 893
 894 source "kernel/power/Kconfig"
 895
 896 source "drivers/cpuidle/Kconfig"
 897
 898 endmenu
 899
 900 source "net/Kconfig"
 901
 902 source "drivers/Kconfig"
 903
 904 source "fs/Kconfig"
 905
 906 source "arch/sh/Kconfig.debug"
 907
 908 source "security/Kconfig"
 909
 910 source "crypto/Kconfig"
 911
 912 source "lib/Kconfig"