arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select EMBEDDED
   4         select HAVE_CLK
   5         select HAVE_IDE if HAS_IOPORT
   6         select HAVE_MEMBLOCK
   7         select HAVE_OPROFILE
   8         select HAVE_GENERIC_DMA_COHERENT
   9         select HAVE_ARCH_TRACEHOOK
  10         select HAVE_DMA_API_DEBUG
  11         select HAVE_DMA_ATTRS
  12         select HAVE_PERF_EVENTS
  13         select PERF_USE_VMALLOC
  14         select HAVE_KERNEL_GZIP
  15         select HAVE_KERNEL_BZIP2
  16         select HAVE_KERNEL_LZMA
  17         select HAVE_KERNEL_LZO
  18         select HAVE_SYSCALL_TRACEPOINTS
  19         select RTC_LIB
  20         select GENERIC_ATOMIC64
  21         help
  22           The SuperH is a RISC processor targeted for use in embedded systems
  23           and consumer electronics; it was also used in the Sega Dreamcast
  24           gaming console.  The SuperH port has a home page at
  25           <http://www.linux-sh.org/>.
  26
  27 config SUPERH32
  28         def_bool ARCH = "sh"
  29         select HAVE_KPROBES
  30         select HAVE_KRETPROBES
  31         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  32         select HAVE_FUNCTION_TRACER
  33         select HAVE_FTRACE_MCOUNT_RECORD
  34         select HAVE_DYNAMIC_FTRACE
  35         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  36         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  37         select HAVE_FUNCTION_GRAPH_TRACER
  38         select HAVE_ARCH_KGDB
  39         select HAVE_HW_BREAKPOINT
  40         select HAVE_MIXED_BREAKPOINTS_REGS
  41         select PERF_EVENTS if HAVE_HW_BREAKPOINT
  42         select ARCH_HIBERNATION_POSSIBLE if MMU
  43
  44 config SUPERH64
  45         def_bool ARCH = "sh64"
  46
  47 config ARCH_DEFCONFIG
  48         string
  49         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  50         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  51
  52 config RWSEM_GENERIC_SPINLOCK
  53         def_bool y
  54
  55 config RWSEM_XCHGADD_ALGORITHM
  56         bool
  57
  58 config GENERIC_BUG
  59         def_bool y
  60         depends on BUG && SUPERH32
  61
  62 config GENERIC_CSUM
  63         def_bool y
  64         depends on SUPERH64
  65
  66 config GENERIC_FIND_NEXT_BIT
  67         def_bool y
  68
  69 config GENERIC_HWEIGHT
  70         def_bool y
  71
  72 config GENERIC_HARDIRQS
  73         def_bool y
  74
  75 config GENERIC_HARDIRQS_NO__DO_IRQ
  76         def_bool y
  77
  78 config IRQ_PER_CPU
  79         def_bool y
  80
  81 config SPARSE_IRQ
  82         def_bool y
  83         depends on SUPERH32
  84
  85 config GENERIC_GPIO
  86         def_bool n
  87
  88 config GENERIC_CALIBRATE_DELAY
  89         bool
  90
  91 config GENERIC_IOMAP
  92         bool
  93
  94 config GENERIC_TIME
  95         def_bool y
  96
  97 config GENERIC_CLOCKEVENTS
  98         def_bool y
  99
 100 config GENERIC_CLOCKEVENTS_BROADCAST
 101         bool
 102
 103 config GENERIC_CMOS_UPDATE
 104         def_bool y
 105         depends on SH_SH03 || SH_DREAMCAST
 106
 107 config GENERIC_LOCKBREAK
 108         def_bool y
 109         depends on SMP && PREEMPT
 110
 111 config SYS_SUPPORTS_PM
 112         bool
 113         depends on !SMP
 114
 115 config ARCH_SUSPEND_POSSIBLE
 116         def_bool n
 117
 118 config ARCH_HIBERNATION_POSSIBLE
 119         def_bool n
 120
 121 config SYS_SUPPORTS_APM_EMULATION
 122         bool
 123         select ARCH_SUSPEND_POSSIBLE
 124
 125 config SYS_SUPPORTS_HUGETLBFS
 126         bool
 127
 128 config SYS_SUPPORTS_SMP
 129         bool
 130
 131 config SYS_SUPPORTS_NUMA
 132         bool
 133
 134 config SYS_SUPPORTS_PCI
 135         bool
 136
 137 config SYS_SUPPORTS_CMT
 138         bool
 139
 140 config SYS_SUPPORTS_MTU2
 141         bool
 142
 143 config SYS_SUPPORTS_TMU
 144         bool
 145
 146 config STACKTRACE_SUPPORT
 147         def_bool y
 148
 149 config LOCKDEP_SUPPORT
 150         def_bool y
 151
 152 config HAVE_LATENCYTOP_SUPPORT
 153         def_bool y
 154
 155 config ARCH_HAS_ILOG2_U32
 156         def_bool n
 157
 158 config ARCH_HAS_ILOG2_U64
 159         def_bool n
 160
 161 config ARCH_NO_VIRT_TO_BUS
 162         def_bool y
 163
 164 config ARCH_HAS_DEFAULT_IDLE
 165         def_bool y
 166
 167 config ARCH_HAS_CPU_IDLE_WAIT
 168         def_bool y
 169
 170 config NO_IOPORT
 171         bool
 172
 173 config IO_TRAPPED
 174         bool
 175
 176 config DMA_COHERENT
 177         bool
 178
 179 config DMA_NONCOHERENT
 180         def_bool !DMA_COHERENT
 181
 182 config NEED_DMA_MAP_STATE
 183         def_bool DMA_NONCOHERENT
 184
 185 config NEED_SG_DMA_LENGTH
 186         def_bool y
 187
 188 source "init/Kconfig"
 189
 190 source "kernel/Kconfig.freezer"
 191
 192 menu "System type"
 193
 194 #
 195 # Processor families
 196 #
 197 config CPU_SH2
 198         bool
 199
 200 config CPU_SH2A
 201         bool
 202         select CPU_SH2
 203
 204 config CPU_SH3
 205         bool
 206         select CPU_HAS_INTEVT
 207         select CPU_HAS_SR_RB
 208         select SYS_SUPPORTS_TMU
 209
 210 config CPU_SH4
 211         bool
 212         select CPU_HAS_INTEVT
 213         select CPU_HAS_SR_RB
 214         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 215         select SYS_SUPPORTS_TMU
 216         select SYS_SUPPORTS_HUGETLBFS if MMU
 217
 218 config CPU_SH4A
 219         bool
 220         select CPU_SH4
 221
 222 config CPU_SH4AL_DSP
 223         bool
 224         select CPU_SH4A
 225         select CPU_HAS_DSP
 226
 227 config CPU_SH5
 228         bool
 229         select CPU_HAS_FPU
 230         select SYS_SUPPORTS_TMU
 231         select SYS_SUPPORTS_HUGETLBFS if MMU
 232
 233 config CPU_SHX2
 234         bool
 235
 236 config CPU_SHX3
 237         bool
 238         select DMA_COHERENT
 239         select SYS_SUPPORTS_SMP
 240         select SYS_SUPPORTS_NUMA
 241
 242 config ARCH_SHMOBILE
 243         bool
 244         select ARCH_SUSPEND_POSSIBLE
 245         select PM
 246         select PM_RUNTIME
 247
 248 if SUPERH32
 249
 250 choice
 251         prompt "Processor sub-type selection"
 252
 253 #
 254 # Processor subtypes
 255 #
 256
 257 # SH-2 Processor Support
 258
 259 config CPU_SUBTYPE_SH7619
 260         bool "Support SH7619 processor"
 261         select CPU_SH2
 262         select SYS_SUPPORTS_CMT
 263
 264 # SH-2A Processor Support
 265
 266 config CPU_SUBTYPE_SH7201
 267         bool "Support SH7201 processor"
 268         select CPU_SH2A
 269         select CPU_HAS_FPU
 270         select SYS_SUPPORTS_MTU2
 271
 272 config CPU_SUBTYPE_SH7203
 273         bool "Support SH7203 processor"
 274         select CPU_SH2A
 275         select CPU_HAS_FPU
 276         select SYS_SUPPORTS_CMT
 277         select SYS_SUPPORTS_MTU2
 278
 279 config CPU_SUBTYPE_SH7206
 280         bool "Support SH7206 processor"
 281         select CPU_SH2A
 282         select SYS_SUPPORTS_CMT
 283         select SYS_SUPPORTS_MTU2
 284
 285 config CPU_SUBTYPE_SH7263
 286         bool "Support SH7263 processor"
 287         select CPU_SH2A
 288         select CPU_HAS_FPU
 289         select SYS_SUPPORTS_CMT
 290         select SYS_SUPPORTS_MTU2
 291
 292 config CPU_SUBTYPE_MXG
 293         bool "Support MX-G processor"
 294         select CPU_SH2A
 295         select SYS_SUPPORTS_MTU2
 296         help
 297           Select MX-G if running on an R8A03022BG part.
 298
 299 # SH-3 Processor Support
 300
 301 config CPU_SUBTYPE_SH7705
 302         bool "Support SH7705 processor"
 303         select CPU_SH3
 304
 305 config CPU_SUBTYPE_SH7706
 306         bool "Support SH7706 processor"
 307         select CPU_SH3
 308         help
 309           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 310
 311 config CPU_SUBTYPE_SH7707
 312         bool "Support SH7707 processor"
 313         select CPU_SH3
 314         help
 315           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 316
 317 config CPU_SUBTYPE_SH7708
 318         bool "Support SH7708 processor"
 319         select CPU_SH3
 320         help
 321           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 322           if you have a 100 Mhz SH-3 HD6417708R CPU.
 323
 324 config CPU_SUBTYPE_SH7709
 325         bool "Support SH7709 processor"
 326         select CPU_SH3
 327         help
 328           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 329
 330 config CPU_SUBTYPE_SH7710
 331         bool "Support SH7710 processor"
 332         select CPU_SH3
 333         select CPU_HAS_DSP
 334         help
 335           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 336
 337 config CPU_SUBTYPE_SH7712
 338         bool "Support SH7712 processor"
 339         select CPU_SH3
 340         select CPU_HAS_DSP
 341         help
 342           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 343
 344 config CPU_SUBTYPE_SH7720
 345         bool "Support SH7720 processor"
 346         select CPU_SH3
 347         select CPU_HAS_DSP
 348         select SYS_SUPPORTS_CMT
 349         help
 350           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 351
 352 config CPU_SUBTYPE_SH7721
 353         bool "Support SH7721 processor"
 354         select CPU_SH3
 355         select CPU_HAS_DSP
 356         select SYS_SUPPORTS_CMT
 357         help
 358           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 359
 360 # SH-4 Processor Support
 361
 362 config CPU_SUBTYPE_SH7750
 363         bool "Support SH7750 processor"
 364         select CPU_SH4
 365         help
 366           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 367
 368 config CPU_SUBTYPE_SH7091
 369         bool "Support SH7091 processor"
 370         select CPU_SH4
 371         help
 372           Select SH7091 if you have an SH-4 based Sega device (such as
 373           the Dreamcast, Naomi, and Naomi 2).
 374
 375 config CPU_SUBTYPE_SH7750R
 376         bool "Support SH7750R processor"
 377         select CPU_SH4
 378
 379 config CPU_SUBTYPE_SH7750S
 380         bool "Support SH7750S processor"
 381         select CPU_SH4
 382
 383 config CPU_SUBTYPE_SH7751
 384         bool "Support SH7751 processor"
 385         select CPU_SH4
 386         help
 387           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 388           or if you have a HD6417751R CPU.
 389
 390 config CPU_SUBTYPE_SH7751R
 391         bool "Support SH7751R processor"
 392         select CPU_SH4
 393
 394 config CPU_SUBTYPE_SH7760
 395         bool "Support SH7760 processor"
 396         select CPU_SH4
 397
 398 config CPU_SUBTYPE_SH4_202
 399         bool "Support SH4-202 processor"
 400         select CPU_SH4
 401
 402 # SH-4A Processor Support
 403
 404 config CPU_SUBTYPE_SH7723
 405         bool "Support SH7723 processor"
 406         select CPU_SH4A
 407         select CPU_SHX2
 408         select ARCH_SHMOBILE
 409         select ARCH_SPARSEMEM_ENABLE
 410         select SYS_SUPPORTS_CMT
 411         help
 412           Select SH7723 if you have an SH-MobileR2 CPU.
 413
 414 config CPU_SUBTYPE_SH7724
 415         bool "Support SH7724 processor"
 416         select CPU_SH4A
 417         select CPU_SHX2
 418         select ARCH_SHMOBILE
 419         select ARCH_SPARSEMEM_ENABLE
 420         select SYS_SUPPORTS_CMT
 421         help
 422           Select SH7724 if you have an SH-MobileR2R CPU.
 423
 424 config CPU_SUBTYPE_SH7757
 425         bool "Support SH7757 processor"
 426         select CPU_SH4A
 427         select CPU_SHX2
 428         help
 429           Select SH7757 if you have a SH4A SH7757 CPU.
 430
 431 config CPU_SUBTYPE_SH7763
 432         bool "Support SH7763 processor"
 433         select CPU_SH4A
 434         help
 435           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 436
 437 config CPU_SUBTYPE_SH7770
 438         bool "Support SH7770 processor"
 439         select CPU_SH4A
 440
 441 config CPU_SUBTYPE_SH7780
 442         bool "Support SH7780 processor"
 443         select CPU_SH4A
 444
 445 config CPU_SUBTYPE_SH7785
 446         bool "Support SH7785 processor"
 447         select CPU_SH4A
 448         select CPU_SHX2
 449         select ARCH_SPARSEMEM_ENABLE
 450         select SYS_SUPPORTS_NUMA
 451
 452 config CPU_SUBTYPE_SH7786
 453         bool "Support SH7786 processor"
 454         select CPU_SH4A
 455         select CPU_SHX3
 456         select CPU_HAS_PTEAEX
 457         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 458
 459 config CPU_SUBTYPE_SHX3
 460         bool "Support SH-X3 processor"
 461         select CPU_SH4A
 462         select CPU_SHX3
 463         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 464
 465 # SH4AL-DSP Processor Support
 466
 467 config CPU_SUBTYPE_SH7343
 468         bool "Support SH7343 processor"
 469         select CPU_SH4AL_DSP
 470         select ARCH_SHMOBILE
 471         select SYS_SUPPORTS_CMT
 472
 473 config CPU_SUBTYPE_SH7722
 474         bool "Support SH7722 processor"
 475         select CPU_SH4AL_DSP
 476         select CPU_SHX2
 477         select ARCH_SHMOBILE
 478         select ARCH_SPARSEMEM_ENABLE
 479         select SYS_SUPPORTS_NUMA
 480         select SYS_SUPPORTS_CMT
 481
 482 config CPU_SUBTYPE_SH7366
 483         bool "Support SH7366 processor"
 484         select CPU_SH4AL_DSP
 485         select CPU_SHX2
 486         select ARCH_SHMOBILE
 487         select ARCH_SPARSEMEM_ENABLE
 488         select SYS_SUPPORTS_NUMA
 489         select SYS_SUPPORTS_CMT
 490
 491 endchoice
 492
 493 endif
 494
 495 if SUPERH64
 496
 497 choice
 498         prompt "Processor sub-type selection"
 499
 500 # SH-5 Processor Support
 501
 502 config CPU_SUBTYPE_SH5_101
 503         bool "Support SH5-101 processor"
 504         select CPU_SH5
 505
 506 config CPU_SUBTYPE_SH5_103
 507         bool "Support SH5-103 processor"
 508         select CPU_SH5
 509
 510 endchoice
 511
 512 endif
 513
 514 source "arch/sh/mm/Kconfig"
 515
 516 source "arch/sh/Kconfig.cpu"
 517
 518 source "arch/sh/boards/Kconfig"
 519
 520 menu "Timer and clock configuration"
 521
 522 config SH_TIMER_TMU
 523         bool "TMU timer driver"
 524         depends on SYS_SUPPORTS_TMU
 525         default y
 526         help
 527           This enables the build of the TMU timer driver.
 528
 529 config SH_TIMER_CMT
 530         bool "CMT timer driver"
 531         depends on SYS_SUPPORTS_CMT
 532         default y
 533         help
 534           This enables build of the CMT timer driver.
 535
 536 config SH_TIMER_MTU2
 537         bool "MTU2 timer driver"
 538         depends on SYS_SUPPORTS_MTU2
 539         default y
 540         help
 541           This enables build of the MTU2 timer driver.
 542
 543 config SH_PCLK_FREQ
 544         int "Peripheral clock frequency (in Hz)"
 545         depends on SH_CLK_CPG_LEGACY
 546         default "31250000" if CPU_SUBTYPE_SH7619
 547         default "33333333" if CPU_SUBTYPE_SH7770 || \
 548                               CPU_SUBTYPE_SH7760 || \
 549                               CPU_SUBTYPE_SH7705 || \
 550                               CPU_SUBTYPE_SH7203 || \
 551                               CPU_SUBTYPE_SH7206 || \
 552                               CPU_SUBTYPE_SH7263 || \
 553                               CPU_SUBTYPE_MXG
 554         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 555         default "66000000" if CPU_SUBTYPE_SH4_202
 556         default "50000000"
 557         help
 558           This option is used to specify the peripheral clock frequency.
 559           This is necessary for determining the reference clock value on
 560           platforms lacking an RTC.
 561
 562 config SH_CLK_CPG
 563         def_bool y
 564
 565 config SH_CLK_CPG_LEGACY
 566         depends on SH_CLK_CPG
 567         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 568                       !CPU_SUBTYPE_SH7786
 569
 570 config SH_CLK_MD
 571         int "CPU Mode Pin Setting"
 572         depends on CPU_SH2
 573         default 6 if CPU_SUBTYPE_SH7206
 574         default 5 if CPU_SUBTYPE_SH7619
 575         default 0
 576         help
 577           MD2 - MD0 pin setting.
 578
 579 source "kernel/time/Kconfig"
 580
 581 endmenu
 582
 583 menu "CPU Frequency scaling"
 584
 585 source "drivers/cpufreq/Kconfig"
 586
 587 config SH_CPU_FREQ
 588         tristate "SuperH CPU Frequency driver"
 589         depends on CPU_FREQ
 590         select CPU_FREQ_TABLE
 591         help
 592           This adds the cpufreq driver for SuperH. Any CPU that supports
 593           clock rate rounding through the clock framework can use this
 594           driver. While it will make the kernel slightly larger, this is
 595           harmless for CPUs that don't support rate rounding. The driver
 596           will also generate a notice in the boot log before disabling
 597           itself if the CPU in question is not capable of rate rounding.
 598
 599           For details, take a look at <file:Documentation/cpu-freq>.
 600
 601           If unsure, say N.
 602
 603 endmenu
 604
 605 source "arch/sh/drivers/Kconfig"
 606
 607 endmenu
 608
 609 menu "Kernel features"
 610
 611 source kernel/Kconfig.hz
 612
 613 config KEXEC
 614         bool "kexec system call (EXPERIMENTAL)"
 615         depends on SUPERH32 && EXPERIMENTAL && MMU
 616         help
 617           kexec is a system call that implements the ability to shutdown your
 618           current kernel, and to start another kernel.  It is like a reboot
 619           but it is independent of the system firmware.  And like a reboot
 620           you can start any kernel with it, not just Linux.
 621
 622           The name comes from the similarity to the exec system call.
 623
 624           It is an ongoing process to be certain the hardware in a machine
 625           is properly shutdown, so do not be surprised if this code does not
 626           initially work for you.  It may help to enable device hotplugging
 627           support.  As of this writing the exact hardware interface is
 628           strongly in flux, so no good recommendation can be made.
 629
 630 config CRASH_DUMP
 631         bool "kernel crash dumps (EXPERIMENTAL)"
 632         depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
 633         help
 634           Generate crash dump after being started by kexec.
 635           This should be normally only set in special crash dump kernels
 636           which are loaded in the main kernel with kexec-tools into
 637           a specially reserved region and then later executed after
 638           a crash by kdump/kexec. The crash dump kernel must be compiled
 639           to a memory address not used by the main kernel using
 640           MEMORY_START.
 641
 642           For more details see Documentation/kdump/kdump.txt
 643
 644 config KEXEC_JUMP
 645         bool "kexec jump (EXPERIMENTAL)"
 646         depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
 647         help
 648           Jump between original kernel and kexeced kernel and invoke
 649           code via KEXEC
 650
 651 config SECCOMP
 652         bool "Enable seccomp to safely compute untrusted bytecode"
 653         depends on PROC_FS
 654         help
 655           This kernel feature is useful for number crunching applications
 656           that may need to compute untrusted bytecode during their
 657           execution. By using pipes or other transports made available to
 658           the process as file descriptors supporting the read/write
 659           syscalls, it's possible to isolate those applications in
 660           their own address space using seccomp. Once seccomp is
 661           enabled via prctl, it cannot be disabled and the task is only
 662           allowed to execute a few safe syscalls defined by each seccomp
 663           mode.
 664
 665           If unsure, say N.
 666
 667 config SMP
 668         bool "Symmetric multi-processing support"
 669         depends on SYS_SUPPORTS_SMP
 670         select USE_GENERIC_SMP_HELPERS
 671         ---help---
 672           This enables support for systems with more than one CPU. If you have
 673           a system with only one CPU, like most personal computers, say N. If
 674           you have a system with more than one CPU, say Y.
 675
 676           If you say N here, the kernel will run on single and multiprocessor
 677           machines, but will use only one CPU of a multiprocessor machine. If
 678           you say Y here, the kernel will run on many, but not all,
 679           singleprocessor machines. On a singleprocessor machine, the kernel
 680           will run faster if you say N here.
 681
 682           People using multiprocessor machines who say Y here should also say
 683           Y to "Enhanced Real Time Clock Support", below.
 684
 685           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 686           available at <http://www.tldp.org/docs.html#howto>.
 687
 688           If you don't know what to do here, say N.
 689
 690 config NR_CPUS
 691         int "Maximum number of CPUs (2-32)"
 692         range 2 32
 693         depends on SMP
 694         default "4" if CPU_SUBTYPE_SHX3
 695         default "2"
 696         help
 697           This allows you to specify the maximum number of CPUs which this
 698           kernel will support.  The maximum supported value is 32 and the
 699           minimum value which makes sense is 2.
 700
 701           This is purely to save memory - each supported CPU adds
 702           approximately eight kilobytes to the kernel image.
 703
 704 config HOTPLUG_CPU
 705         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 706         depends on SMP && HOTPLUG && EXPERIMENTAL
 707         help
 708           Say Y here to experiment with turning CPUs off and on.  CPUs
 709           can be controlled through /sys/devices/system/cpu.
 710
 711 source "kernel/Kconfig.preempt"
 712
 713 config GUSA
 714         def_bool y
 715         depends on !SMP && SUPERH32
 716         help
 717           This enables support for gUSA (general UserSpace Atomicity).
 718           This is the default implementation for both UP and non-ll/sc
 719           CPUs, and is used by the libc, amongst others.
 720
 721           For additional information, design information can be found
 722           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 723
 724           This should only be disabled for special cases where alternate
 725           atomicity implementations exist.
 726
 727 config GUSA_RB
 728         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 729         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 730         help
 731           Enabling this option will allow the kernel to implement some
 732           atomic operations using a software implementation of load-locked/
 733           store-conditional (LLSC). On machines which do not have hardware
 734           LLSC, this should be more efficient than the other alternative of
 735           disabling interrupts around the atomic sequence.
 736
 737 source "drivers/sh/Kconfig"
 738
 739 endmenu
 740
 741 menu "Boot options"
 742
 743 config ZERO_PAGE_OFFSET
 744         hex
 745         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 746                                 SH_7751_SOLUTION_ENGINE
 747         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 748         default "0x00002000" if PAGE_SIZE_8KB
 749         default "0x00001000"
 750         help
 751           This sets the default offset of zero page.
 752
 753 config BOOT_LINK_OFFSET
 754         hex
 755         default "0x00210000" if SH_SHMIN
 756         default "0x00400000" if SH_CAYMAN
 757         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 758         default "0x009e0000" if SH_TITAN
 759         default "0x01800000" if SH_SDK7780
 760         default "0x02000000" if SH_EDOSK7760
 761         default "0x00800000"
 762         help
 763           This option allows you to set the link address offset of the zImage.
 764           This can be useful if you are on a board which has a small amount of
 765           memory.
 766
 767 config ENTRY_OFFSET
 768         hex
 769         default "0x00001000" if PAGE_SIZE_4KB
 770         default "0x00002000" if PAGE_SIZE_8KB
 771         default "0x00004000" if PAGE_SIZE_16KB
 772         default "0x00010000" if PAGE_SIZE_64KB
 773         default "0x00000000"
 774
 775 config ROMIMAGE_MMCIF
 776         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 777         depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
 778         help
 779           Say Y here to include experimental MMCIF loading code in
 780           romImage. With this enabled it is possible to write the romImage
 781           kernel image to an MMC card and boot the kernel straight from
 782           the reset vector. At reset the processor Mask ROM will load the
 783           first part of the romImage which in turn loads the rest the kernel
 784           image to RAM using the MMCIF hardware block.
 785
 786 choice
 787         prompt "Kernel command line"
 788         optional
 789         default CMDLINE_OVERWRITE
 790         help
 791           Setting this option allows the kernel command line arguments
 792           to be set.
 793
 794 config CMDLINE_OVERWRITE
 795         bool "Overwrite bootloader kernel arguments"
 796         help
 797           Given string will overwrite any arguments passed in by
 798           a bootloader.
 799
 800 config CMDLINE_EXTEND
 801         bool "Extend bootloader kernel arguments"
 802         help
 803           Given string will be concatenated with arguments passed in
 804           by a bootloader.
 805
 806 endchoice
 807
 808 config CMDLINE
 809         string "Kernel command line arguments string"
 810         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 811         default "console=ttySC1,115200"
 812
 813 endmenu
 814
 815 menu "Bus options"
 816
 817 config SUPERHYWAY
 818         tristate "SuperHyway Bus support"
 819         depends on CPU_SUBTYPE_SH4_202
 820
 821 config MAPLE
 822         bool "Maple Bus support"
 823         depends on SH_DREAMCAST
 824         help
 825          The Maple Bus is SEGA's serial communication bus for peripherals
 826          on the Dreamcast. Without this bus support you won't be able to
 827          get your Dreamcast keyboard etc to work, so most users
 828          probably want to say 'Y' here, unless you are only using the
 829          Dreamcast with a serial line terminal or a remote network
 830          connection.
 831
 832 config PCI
 833         bool "PCI support"
 834         depends on SYS_SUPPORTS_PCI
 835         select PCI_DOMAINS
 836         help
 837           Find out whether you have a PCI motherboard. PCI is the name of a
 838           bus system, i.e. the way the CPU talks to the other stuff inside
 839           your box. If you have PCI, say Y, otherwise N.
 840
 841 config PCI_DOMAINS
 842         bool
 843
 844 source "drivers/pci/pcie/Kconfig"
 845
 846 source "drivers/pci/Kconfig"
 847
 848 source "drivers/pcmcia/Kconfig"
 849
 850 source "drivers/pci/hotplug/Kconfig"
 851
 852 endmenu
 853
 854 menu "Executable file formats"
 855
 856 source "fs/Kconfig.binfmt"
 857
 858 endmenu
 859
 860 menu "Power management options (EXPERIMENTAL)"
 861 depends on EXPERIMENTAL
 862
 863 source "kernel/power/Kconfig"
 864
 865 source "drivers/cpuidle/Kconfig"
 866
 867 endmenu
 868
 869 source "net/Kconfig"
 870
 871 source "drivers/Kconfig"
 872
 873 source "fs/Kconfig"
 874
 875 source "arch/sh/Kconfig.debug"
 876
 877 source "security/Kconfig"
 878
 879 source "crypto/Kconfig"
 880
 881 menuconfig VIRTUALIZATION
 882         bool "Virtualization"
 883         default n
 884         ---help---
 885           Say Y here to get to see options for using your Linux host to run other
 886           operating systems inside virtual machines (guests).
 887           This option alone does not add any kernel code.
 888
 889           If you say N, all options in this submenu will be skipped and disabled.
 890
 891 if VIRTUALIZATION
 892
 893 source drivers/virtio/Kconfig
 894
 895 endif # VIRTUALIZATION
 896
 897 source "lib/Kconfig"