arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   4         select ARCH_MIGHT_HAVE_PC_PARPORT
   5         select HAVE_PATA_PLATFORM
   6         select CLKDEV_LOOKUP
   7         select HAVE_IDE if HAS_IOPORT_MAP
   8         select HAVE_MEMBLOCK
   9         select HAVE_MEMBLOCK_NODE_MAP
  10         select ARCH_DISCARD_MEMBLOCK
  11         select HAVE_OPROFILE
  12         select HAVE_GENERIC_DMA_COHERENT
  13         select HAVE_ARCH_TRACEHOOK
  14         select HAVE_DMA_API_DEBUG
  15         select HAVE_PERF_EVENTS
  16         select HAVE_DEBUG_BUGVERBOSE
  17         select ARCH_HAVE_CUSTOM_GPIO_H
  18         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  19         select ARCH_HAS_GCOV_PROFILE_ALL
  20         select PERF_USE_VMALLOC
  21         select HAVE_DEBUG_KMEMLEAK
  22         select HAVE_KERNEL_GZIP
  23         select CPU_NO_EFFICIENT_FFS
  24         select HAVE_KERNEL_BZIP2
  25         select HAVE_KERNEL_LZMA
  26         select HAVE_KERNEL_XZ
  27         select HAVE_KERNEL_LZO
  28         select HAVE_UID16
  29         select ARCH_WANT_IPC_PARSE_VERSION
  30         select HAVE_SYSCALL_TRACEPOINTS
  31         select HAVE_REGS_AND_STACK_ACCESS_API
  32         select MAY_HAVE_SPARSE_IRQ
  33         select IRQ_FORCED_THREADING
  34         select RTC_LIB
  35         select GENERIC_ATOMIC64
  36         select GENERIC_IRQ_SHOW
  37         select GENERIC_SMP_IDLE_THREAD
  38         select GENERIC_IDLE_POLL_SETUP
  39         select GENERIC_CLOCKEVENTS
  40         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  41         select GENERIC_SCHED_CLOCK
  42         select GENERIC_STRNCPY_FROM_USER
  43         select GENERIC_STRNLEN_USER
  44         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  45         select MODULES_USE_ELF_RELA
  46         select OLD_SIGSUSPEND
  47         select OLD_SIGACTION
  48         select HAVE_ARCH_AUDITSYSCALL
  49         select HAVE_FUTEX_CMPXCHG if FUTEX
  50         select HAVE_NMI
  51         help
  52           The SuperH is a RISC processor targeted for use in embedded systems
  53           and consumer electronics; it was also used in the Sega Dreamcast
  54           gaming console.  The SuperH port has a home page at
  55           <http://www.linux-sh.org/>.
  56
  57 config SUPERH32
  58         def_bool ARCH = "sh"
  59         select HAVE_KPROBES
  60         select HAVE_KRETPROBES
  61         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  62         select HAVE_FUNCTION_TRACER
  63         select HAVE_FTRACE_MCOUNT_RECORD
  64         select HAVE_DYNAMIC_FTRACE
  65         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  66         select ARCH_WANT_IPC_PARSE_VERSION
  67         select HAVE_FUNCTION_GRAPH_TRACER
  68         select HAVE_ARCH_KGDB
  69         select HAVE_HW_BREAKPOINT
  70         select HAVE_MIXED_BREAKPOINTS_REGS
  71         select PERF_EVENTS
  72         select ARCH_HIBERNATION_POSSIBLE if MMU
  73         select SPARSE_IRQ
  74         select HAVE_CC_STACKPROTECTOR
  75
  76 config SUPERH64
  77         def_bool ARCH = "sh64"
  78         select HAVE_EXIT_THREAD
  79         select KALLSYMS
  80
  81 config ARCH_DEFCONFIG
  82         string
  83         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  84         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  85
  86 config RWSEM_GENERIC_SPINLOCK
  87         def_bool y
  88
  89 config RWSEM_XCHGADD_ALGORITHM
  90         bool
  91
  92 config GENERIC_BUG
  93         def_bool y
  94         depends on BUG && SUPERH32
  95
  96 config GENERIC_CSUM
  97         def_bool y
  98         depends on SUPERH64
  99
 100 config GENERIC_HWEIGHT
 101         def_bool y
 102
 103 config GENERIC_CALIBRATE_DELAY
 104         bool
 105
 106 config GENERIC_LOCKBREAK
 107         def_bool y
 108         depends on SMP && PREEMPT
 109
 110 config ARCH_SUSPEND_POSSIBLE
 111         def_bool n
 112
 113 config ARCH_HIBERNATION_POSSIBLE
 114         def_bool n
 115
 116 config SYS_SUPPORTS_APM_EMULATION
 117         bool
 118         select ARCH_SUSPEND_POSSIBLE
 119
 120 config SYS_SUPPORTS_HUGETLBFS
 121         bool
 122
 123 config SYS_SUPPORTS_SMP
 124         bool
 125
 126 config SYS_SUPPORTS_NUMA
 127         bool
 128
 129 config SYS_SUPPORTS_PCI
 130         bool
 131
 132 config STACKTRACE_SUPPORT
 133         def_bool y
 134
 135 config LOCKDEP_SUPPORT
 136         def_bool y
 137
 138 config ARCH_HAS_ILOG2_U32
 139         def_bool n
 140
 141 config ARCH_HAS_ILOG2_U64
 142         def_bool n
 143
 144 config NO_IOPORT_MAP
 145         def_bool !PCI
 146         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 147                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 148
 149 config IO_TRAPPED
 150         bool
 151
 152 config SWAP_IO_SPACE
 153         bool
 154
 155 config DMA_COHERENT
 156         bool
 157
 158 config DMA_NONCOHERENT
 159         def_bool !DMA_COHERENT
 160
 161 config NEED_DMA_MAP_STATE
 162         def_bool DMA_NONCOHERENT
 163
 164 config NEED_SG_DMA_LENGTH
 165         def_bool y
 166
 167 config PGTABLE_LEVELS
 168         default 3 if X2TLB
 169         default 2
 170
 171 source "init/Kconfig"
 172
 173 source "kernel/Kconfig.freezer"
 174
 175 menu "System type"
 176
 177 #
 178 # Processor families
 179 #
 180 config CPU_SH2
 181         bool
 182         select SH_INTC
 183
 184 config CPU_SH2A
 185         bool
 186         select CPU_SH2
 187         select UNCACHED_MAPPING
 188
 189 config CPU_J2
 190         bool
 191         select CPU_SH2
 192         select OF
 193         select OF_EARLY_FLATTREE
 194
 195 config CPU_SH3
 196         bool
 197         select CPU_HAS_INTEVT
 198         select CPU_HAS_SR_RB
 199         select SH_INTC
 200         select SYS_SUPPORTS_SH_TMU
 201
 202 config CPU_SH4
 203         bool
 204         select CPU_HAS_INTEVT
 205         select CPU_HAS_SR_RB
 206         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 207         select SH_INTC
 208         select SYS_SUPPORTS_SH_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_SH_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
 240 config CPU_HAS_PMU
 241        depends on CPU_SH4 || CPU_SH4A
 242        default y
 243        bool
 244
 245 if SUPERH32
 246
 247 choice
 248         prompt "Processor sub-type selection"
 249
 250 #
 251 # Processor subtypes
 252 #
 253
 254 # SH-2 Processor Support
 255
 256 config CPU_SUBTYPE_SH7619
 257         bool "Support SH7619 processor"
 258         select CPU_SH2
 259         select SYS_SUPPORTS_SH_CMT
 260
 261 config CPU_SUBTYPE_J2
 262         bool "Support J2 processor"
 263         select CPU_J2
 264         select SYS_SUPPORTS_SMP
 265         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 266
 267 # SH-2A Processor Support
 268
 269 config CPU_SUBTYPE_SH7201
 270         bool "Support SH7201 processor"
 271         select CPU_SH2A
 272         select CPU_HAS_FPU
 273         select SYS_SUPPORTS_SH_MTU2
 274
 275 config CPU_SUBTYPE_SH7203
 276         bool "Support SH7203 processor"
 277         select CPU_SH2A
 278         select CPU_HAS_FPU
 279         select SYS_SUPPORTS_SH_CMT
 280         select SYS_SUPPORTS_SH_MTU2
 281         select PINCTRL
 282
 283 config CPU_SUBTYPE_SH7206
 284         bool "Support SH7206 processor"
 285         select CPU_SH2A
 286         select SYS_SUPPORTS_SH_CMT
 287         select SYS_SUPPORTS_SH_MTU2
 288
 289 config CPU_SUBTYPE_SH7263
 290         bool "Support SH7263 processor"
 291         select CPU_SH2A
 292         select CPU_HAS_FPU
 293         select SYS_SUPPORTS_SH_CMT
 294         select SYS_SUPPORTS_SH_MTU2
 295
 296 config CPU_SUBTYPE_SH7264
 297         bool "Support SH7264 processor"
 298         select CPU_SH2A
 299         select CPU_HAS_FPU
 300         select SYS_SUPPORTS_SH_CMT
 301         select SYS_SUPPORTS_SH_MTU2
 302         select PINCTRL
 303
 304 config CPU_SUBTYPE_SH7269
 305         bool "Support SH7269 processor"
 306         select CPU_SH2A
 307         select CPU_HAS_FPU
 308         select SYS_SUPPORTS_SH_CMT
 309         select SYS_SUPPORTS_SH_MTU2
 310         select PINCTRL
 311
 312 config CPU_SUBTYPE_MXG
 313         bool "Support MX-G processor"
 314         select CPU_SH2A
 315         select SYS_SUPPORTS_SH_MTU2
 316         help
 317           Select MX-G if running on an R8A03022BG part.
 318
 319 # SH-3 Processor Support
 320
 321 config CPU_SUBTYPE_SH7705
 322         bool "Support SH7705 processor"
 323         select CPU_SH3
 324
 325 config CPU_SUBTYPE_SH7706
 326         bool "Support SH7706 processor"
 327         select CPU_SH3
 328         help
 329           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 330
 331 config CPU_SUBTYPE_SH7707
 332         bool "Support SH7707 processor"
 333         select CPU_SH3
 334         help
 335           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 336
 337 config CPU_SUBTYPE_SH7708
 338         bool "Support SH7708 processor"
 339         select CPU_SH3
 340         help
 341           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 342           if you have a 100 Mhz SH-3 HD6417708R CPU.
 343
 344 config CPU_SUBTYPE_SH7709
 345         bool "Support SH7709 processor"
 346         select CPU_SH3
 347         help
 348           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 349
 350 config CPU_SUBTYPE_SH7710
 351         bool "Support SH7710 processor"
 352         select CPU_SH3
 353         select CPU_HAS_DSP
 354         help
 355           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 356
 357 config CPU_SUBTYPE_SH7712
 358         bool "Support SH7712 processor"
 359         select CPU_SH3
 360         select CPU_HAS_DSP
 361         help
 362           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 363
 364 config CPU_SUBTYPE_SH7720
 365         bool "Support SH7720 processor"
 366         select CPU_SH3
 367         select CPU_HAS_DSP
 368         select SYS_SUPPORTS_SH_CMT
 369         select USB_OHCI_SH if USB_OHCI_HCD
 370         select PINCTRL
 371         help
 372           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 373
 374 config CPU_SUBTYPE_SH7721
 375         bool "Support SH7721 processor"
 376         select CPU_SH3
 377         select CPU_HAS_DSP
 378         select SYS_SUPPORTS_SH_CMT
 379         select USB_OHCI_SH if USB_OHCI_HCD
 380         help
 381           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 382
 383 # SH-4 Processor Support
 384
 385 config CPU_SUBTYPE_SH7750
 386         bool "Support SH7750 processor"
 387         select CPU_SH4
 388         help
 389           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 390
 391 config CPU_SUBTYPE_SH7091
 392         bool "Support SH7091 processor"
 393         select CPU_SH4
 394         help
 395           Select SH7091 if you have an SH-4 based Sega device (such as
 396           the Dreamcast, Naomi, and Naomi 2).
 397
 398 config CPU_SUBTYPE_SH7750R
 399         bool "Support SH7750R processor"
 400         select CPU_SH4
 401
 402 config CPU_SUBTYPE_SH7750S
 403         bool "Support SH7750S processor"
 404         select CPU_SH4
 405
 406 config CPU_SUBTYPE_SH7751
 407         bool "Support SH7751 processor"
 408         select CPU_SH4
 409         help
 410           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 411           or if you have a HD6417751R CPU.
 412
 413 config CPU_SUBTYPE_SH7751R
 414         bool "Support SH7751R processor"
 415         select CPU_SH4
 416
 417 config CPU_SUBTYPE_SH7760
 418         bool "Support SH7760 processor"
 419         select CPU_SH4
 420
 421 config CPU_SUBTYPE_SH4_202
 422         bool "Support SH4-202 processor"
 423         select CPU_SH4
 424
 425 # SH-4A Processor Support
 426
 427 config CPU_SUBTYPE_SH7723
 428         bool "Support SH7723 processor"
 429         select CPU_SH4A
 430         select CPU_SHX2
 431         select ARCH_SHMOBILE
 432         select ARCH_SPARSEMEM_ENABLE
 433         select SYS_SUPPORTS_SH_CMT
 434         select PINCTRL
 435         help
 436           Select SH7723 if you have an SH-MobileR2 CPU.
 437
 438 config CPU_SUBTYPE_SH7724
 439         bool "Support SH7724 processor"
 440         select CPU_SH4A
 441         select CPU_SHX2
 442         select ARCH_SHMOBILE
 443         select ARCH_SPARSEMEM_ENABLE
 444         select SYS_SUPPORTS_SH_CMT
 445         select PINCTRL
 446         help
 447           Select SH7724 if you have an SH-MobileR2R CPU.
 448
 449 config CPU_SUBTYPE_SH7734
 450         bool "Support SH7734 processor"
 451         select CPU_SH4A
 452         select CPU_SHX2
 453         select PINCTRL
 454         help
 455           Select SH7734 if you have a SH4A SH7734 CPU.
 456
 457 config CPU_SUBTYPE_SH7757
 458         bool "Support SH7757 processor"
 459         select CPU_SH4A
 460         select CPU_SHX2
 461         select PINCTRL
 462         help
 463           Select SH7757 if you have a SH4A SH7757 CPU.
 464
 465 config CPU_SUBTYPE_SH7763
 466         bool "Support SH7763 processor"
 467         select CPU_SH4A
 468         select USB_OHCI_SH if USB_OHCI_HCD
 469         help
 470           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 471
 472 config CPU_SUBTYPE_SH7770
 473         bool "Support SH7770 processor"
 474         select CPU_SH4A
 475
 476 config CPU_SUBTYPE_SH7780
 477         bool "Support SH7780 processor"
 478         select CPU_SH4A
 479
 480 config CPU_SUBTYPE_SH7785
 481         bool "Support SH7785 processor"
 482         select CPU_SH4A
 483         select CPU_SHX2
 484         select ARCH_SPARSEMEM_ENABLE
 485         select SYS_SUPPORTS_NUMA
 486         select PINCTRL
 487
 488 config CPU_SUBTYPE_SH7786
 489         bool "Support SH7786 processor"
 490         select CPU_SH4A
 491         select CPU_SHX3
 492         select CPU_HAS_PTEAEX
 493         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 494         select USB_OHCI_SH if USB_OHCI_HCD
 495         select USB_EHCI_SH if USB_EHCI_HCD
 496         select PINCTRL
 497
 498 config CPU_SUBTYPE_SHX3
 499         bool "Support SH-X3 processor"
 500         select CPU_SH4A
 501         select CPU_SHX3
 502         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 503         select GPIOLIB
 504         select PINCTRL
 505
 506 # SH4AL-DSP Processor Support
 507
 508 config CPU_SUBTYPE_SH7343
 509         bool "Support SH7343 processor"
 510         select CPU_SH4AL_DSP
 511         select ARCH_SHMOBILE
 512         select SYS_SUPPORTS_SH_CMT
 513
 514 config CPU_SUBTYPE_SH7722
 515         bool "Support SH7722 processor"
 516         select CPU_SH4AL_DSP
 517         select CPU_SHX2
 518         select ARCH_SHMOBILE
 519         select ARCH_SPARSEMEM_ENABLE
 520         select SYS_SUPPORTS_NUMA
 521         select SYS_SUPPORTS_SH_CMT
 522         select PINCTRL
 523
 524 config CPU_SUBTYPE_SH7366
 525         bool "Support SH7366 processor"
 526         select CPU_SH4AL_DSP
 527         select CPU_SHX2
 528         select ARCH_SHMOBILE
 529         select ARCH_SPARSEMEM_ENABLE
 530         select SYS_SUPPORTS_NUMA
 531         select SYS_SUPPORTS_SH_CMT
 532
 533 endchoice
 534
 535 endif
 536
 537 if SUPERH64
 538
 539 choice
 540         prompt "Processor sub-type selection"
 541
 542 # SH-5 Processor Support
 543
 544 config CPU_SUBTYPE_SH5_101
 545         bool "Support SH5-101 processor"
 546         select CPU_SH5
 547
 548 config CPU_SUBTYPE_SH5_103
 549         bool "Support SH5-103 processor"
 550         select CPU_SH5
 551
 552 endchoice
 553
 554 endif
 555
 556 source "arch/sh/mm/Kconfig"
 557
 558 source "arch/sh/Kconfig.cpu"
 559
 560 source "arch/sh/boards/Kconfig"
 561
 562 menu "Timer and clock configuration"
 563
 564 config SH_PCLK_FREQ
 565         int "Peripheral clock frequency (in Hz)"
 566         depends on SH_CLK_CPG_LEGACY
 567         default "31250000" if CPU_SUBTYPE_SH7619
 568         default "33333333" if CPU_SUBTYPE_SH7770 || \
 569                               CPU_SUBTYPE_SH7760 || \
 570                               CPU_SUBTYPE_SH7705 || \
 571                               CPU_SUBTYPE_SH7203 || \
 572                               CPU_SUBTYPE_SH7206 || \
 573                               CPU_SUBTYPE_SH7263 || \
 574                               CPU_SUBTYPE_MXG
 575         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 576         default "66000000" if CPU_SUBTYPE_SH4_202
 577         default "50000000"
 578         help
 579           This option is used to specify the peripheral clock frequency.
 580           This is necessary for determining the reference clock value on
 581           platforms lacking an RTC.
 582
 583 config SH_CLK_CPG
 584         def_bool y
 585
 586 config SH_CLK_CPG_LEGACY
 587         depends on SH_CLK_CPG
 588         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 589                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 590                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 591                       !CPU_SUBTYPE_SH7269
 592
 593 endmenu
 594
 595 menu "CPU Frequency scaling"
 596 source "drivers/cpufreq/Kconfig"
 597 endmenu
 598
 599 source "arch/sh/drivers/Kconfig"
 600
 601 endmenu
 602
 603 menu "Kernel features"
 604
 605 source kernel/Kconfig.hz
 606
 607 config KEXEC
 608         bool "kexec system call (EXPERIMENTAL)"
 609         depends on SUPERH32 && MMU
 610         select KEXEC_CORE
 611         help
 612           kexec is a system call that implements the ability to shutdown your
 613           current kernel, and to start another kernel.  It is like a reboot
 614           but it is independent of the system firmware.  And like a reboot
 615           you can start any kernel with it, not just Linux.
 616
 617           The name comes from the similarity to the exec system call.
 618
 619           It is an ongoing process to be certain the hardware in a machine
 620           is properly shutdown, so do not be surprised if this code does not
 621           initially work for you.  As of this writing the exact hardware
 622           interface is strongly in flux, so no good recommendation can be
 623           made.
 624
 625 config CRASH_DUMP
 626         bool "kernel crash dumps (EXPERIMENTAL)"
 627         depends on SUPERH32 && BROKEN_ON_SMP
 628         help
 629           Generate crash dump after being started by kexec.
 630           This should be normally only set in special crash dump kernels
 631           which are loaded in the main kernel with kexec-tools into
 632           a specially reserved region and then later executed after
 633           a crash by kdump/kexec. The crash dump kernel must be compiled
 634           to a memory address not used by the main kernel using
 635           PHYSICAL_START.
 636
 637           For more details see Documentation/kdump/kdump.txt
 638
 639 config KEXEC_JUMP
 640         bool "kexec jump (EXPERIMENTAL)"
 641         depends on SUPERH32 && KEXEC && HIBERNATION
 642         help
 643           Jump between original kernel and kexeced kernel and invoke
 644           code via KEXEC
 645
 646 config PHYSICAL_START
 647         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 648         default MEMORY_START
 649         ---help---
 650           This gives the physical address where the kernel is loaded
 651           and is ordinarily the same as MEMORY_START.
 652
 653           Different values are primarily used in the case of kexec on panic
 654           where the fail safe kernel needs to run at a different address
 655           than the panic-ed kernel.
 656
 657 config SECCOMP
 658         bool "Enable seccomp to safely compute untrusted bytecode"
 659         depends on PROC_FS
 660         help
 661           This kernel feature is useful for number crunching applications
 662           that may need to compute untrusted bytecode during their
 663           execution. By using pipes or other transports made available to
 664           the process as file descriptors supporting the read/write
 665           syscalls, it's possible to isolate those applications in
 666           their own address space using seccomp. Once seccomp is
 667           enabled via prctl, it cannot be disabled and the task is only
 668           allowed to execute a few safe syscalls defined by each seccomp
 669           mode.
 670
 671           If unsure, say N.
 672
 673 config SMP
 674         bool "Symmetric multi-processing support"
 675         depends on SYS_SUPPORTS_SMP
 676         ---help---
 677           This enables support for systems with more than one CPU. If you have
 678           a system with only one CPU, say N. If you have a system with more
 679           than one CPU, say Y.
 680
 681           If you say N here, the kernel will run on uni- and multiprocessor
 682           machines, but will use only one CPU of a multiprocessor machine. If
 683           you say Y here, the kernel will run on many, but not all,
 684           uniprocessor machines. On a uniprocessor machine, the kernel
 685           will run faster if you say N here.
 686
 687           People using multiprocessor machines who say Y here should also say
 688           Y to "Enhanced Real Time Clock Support", below.
 689
 690           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 691           available at <http://www.tldp.org/docs.html#howto>.
 692
 693           If you don't know what to do here, say N.
 694
 695 config NR_CPUS
 696         int "Maximum number of CPUs (2-32)"
 697         range 2 32
 698         depends on SMP
 699         default "4" if CPU_SUBTYPE_SHX3
 700         default "2"
 701         help
 702           This allows you to specify the maximum number of CPUs which this
 703           kernel will support.  The maximum supported value is 32 and the
 704           minimum value which makes sense is 2.
 705
 706           This is purely to save memory - each supported CPU adds
 707           approximately eight kilobytes to the kernel image.
 708
 709 config HOTPLUG_CPU
 710         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 711         depends on SMP
 712         help
 713           Say Y here to experiment with turning CPUs off and on.  CPUs
 714           can be controlled through /sys/devices/system/cpu.
 715
 716 source "kernel/Kconfig.preempt"
 717
 718 config GUSA
 719         def_bool y
 720         depends on !SMP && SUPERH32
 721         help
 722           This enables support for gUSA (general UserSpace Atomicity).
 723           This is the default implementation for both UP and non-ll/sc
 724           CPUs, and is used by the libc, amongst others.
 725
 726           For additional information, design information can be found
 727           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 728
 729           This should only be disabled for special cases where alternate
 730           atomicity implementations exist.
 731
 732 config GUSA_RB
 733         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 734         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 735         help
 736           Enabling this option will allow the kernel to implement some
 737           atomic operations using a software implementation of load-locked/
 738           store-conditional (LLSC). On machines which do not have hardware
 739           LLSC, this should be more efficient than the other alternative of
 740           disabling interrupts around the atomic sequence.
 741
 742 config HW_PERF_EVENTS
 743         bool "Enable hardware performance counter support for perf events"
 744         depends on PERF_EVENTS && CPU_HAS_PMU
 745         default y
 746         help
 747           Enable hardware performance counter support for perf events. If
 748           disabled, perf events will use software events only.
 749
 750 source "drivers/sh/Kconfig"
 751
 752 endmenu
 753
 754 menu "Boot options"
 755
 756 config USE_BUILTIN_DTB
 757         bool "Use builtin DTB"
 758         default n
 759         depends on SH_DEVICE_TREE
 760         help
 761           Link a device tree blob for particular hardware into the kernel,
 762           suppressing use of the DTB pointer provided by the bootloader.
 763           This option should only be used with legacy bootloaders that are
 764           not capable of providing a DTB to the kernel, or for experimental
 765           hardware without stable device tree bindings.
 766
 767 config BUILTIN_DTB_SOURCE
 768         string "Source file for builtin DTB"
 769         default ""
 770         depends on USE_BUILTIN_DTB
 771         help
 772           Base name (without suffix, relative to arch/sh/boot/dts) for the
 773           a DTS file that will be used to produce the DTB linked into the
 774           kernel.
 775
 776 config ZERO_PAGE_OFFSET
 777         hex
 778         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 779                                 SH_7751_SOLUTION_ENGINE
 780         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 781         default "0x00002000" if PAGE_SIZE_8KB
 782         default "0x00001000"
 783         help
 784           This sets the default offset of zero page.
 785
 786 config BOOT_LINK_OFFSET
 787         hex
 788         default "0x00210000" if SH_SHMIN
 789         default "0x00400000" if SH_CAYMAN
 790         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 791         default "0x009e0000" if SH_TITAN
 792         default "0x01800000" if SH_SDK7780
 793         default "0x02000000" if SH_EDOSK7760
 794         default "0x00800000"
 795         help
 796           This option allows you to set the link address offset of the zImage.
 797           This can be useful if you are on a board which has a small amount of
 798           memory.
 799
 800 config ENTRY_OFFSET
 801         hex
 802         default "0x00001000" if PAGE_SIZE_4KB
 803         default "0x00002000" if PAGE_SIZE_8KB
 804         default "0x00004000" if PAGE_SIZE_16KB
 805         default "0x00010000" if PAGE_SIZE_64KB
 806         default "0x00000000"
 807
 808 config ROMIMAGE_MMCIF
 809         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 810         depends on CPU_SUBTYPE_SH7724
 811         help
 812           Say Y here to include experimental MMCIF loading code in
 813           romImage. With this enabled it is possible to write the romImage
 814           kernel image to an MMC card and boot the kernel straight from
 815           the reset vector. At reset the processor Mask ROM will load the
 816           first part of the romImage which in turn loads the rest the kernel
 817           image to RAM using the MMCIF hardware block.
 818
 819 choice
 820         prompt "Kernel command line"
 821         optional
 822         default CMDLINE_OVERWRITE
 823         help
 824           Setting this option allows the kernel command line arguments
 825           to be set.
 826
 827 config CMDLINE_OVERWRITE
 828         bool "Overwrite bootloader kernel arguments"
 829         help
 830           Given string will overwrite any arguments passed in by
 831           a bootloader.
 832
 833 config CMDLINE_EXTEND
 834         bool "Extend bootloader kernel arguments"
 835         help
 836           Given string will be concatenated with arguments passed in
 837           by a bootloader.
 838
 839 endchoice
 840
 841 config CMDLINE
 842         string "Kernel command line arguments string"
 843         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 844         default "console=ttySC1,115200"
 845
 846 endmenu
 847
 848 menu "Bus options"
 849
 850 config SUPERHYWAY
 851         tristate "SuperHyway Bus support"
 852         depends on CPU_SUBTYPE_SH4_202
 853
 854 config MAPLE
 855         bool "Maple Bus support"
 856         depends on SH_DREAMCAST
 857         help
 858          The Maple Bus is SEGA's serial communication bus for peripherals
 859          on the Dreamcast. Without this bus support you won't be able to
 860          get your Dreamcast keyboard etc to work, so most users
 861          probably want to say 'Y' here, unless you are only using the
 862          Dreamcast with a serial line terminal or a remote network
 863          connection.
 864
 865 config PCI
 866         bool "PCI support"
 867         depends on SYS_SUPPORTS_PCI
 868         select PCI_DOMAINS
 869         select GENERIC_PCI_IOMAP
 870         select NO_GENERIC_PCI_IOPORT_MAP
 871         help
 872           Find out whether you have a PCI motherboard. PCI is the name of a
 873           bus system, i.e. the way the CPU talks to the other stuff inside
 874           your box. If you have PCI, say Y, otherwise N.
 875
 876 config PCI_DOMAINS
 877         bool
 878
 879 source "drivers/pci/Kconfig"
 880
 881 source "drivers/pcmcia/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
 893 source "kernel/power/Kconfig"
 894
 895 source "drivers/cpuidle/Kconfig"
 896
 897 endmenu
 898
 899 source "net/Kconfig"
 900
 901 source "drivers/Kconfig"
 902
 903 source "fs/Kconfig"
 904
 905 source "arch/sh/Kconfig.debug"
 906
 907 source "security/Kconfig"
 908
 909 source "crypto/Kconfig"
 910
 911 source "lib/Kconfig"