arch/sh/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config SUPERH
   3         def_bool y
   4         select ARCH_HAS_PTE_SPECIAL
   5         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   6         select ARCH_MIGHT_HAVE_PC_PARPORT
   7         select ARCH_NO_COHERENT_DMA_MMAP if !MMU
   8         select HAVE_PATA_PLATFORM
   9         select CLKDEV_LOOKUP
  10         select HAVE_IDE if HAS_IOPORT_MAP
  11         select HAVE_MEMBLOCK_NODE_MAP
  12         select ARCH_DISCARD_MEMBLOCK
  13         select HAVE_OPROFILE
  14         select HAVE_GENERIC_DMA_COHERENT
  15         select HAVE_ARCH_TRACEHOOK
  16         select HAVE_PERF_EVENTS
  17         select HAVE_DEBUG_BUGVERBOSE
  18         select ARCH_HAVE_CUSTOM_GPIO_H
  19         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  20         select ARCH_HAS_GCOV_PROFILE_ALL
  21         select PERF_USE_VMALLOC
  22         select HAVE_DEBUG_KMEMLEAK
  23         select HAVE_KERNEL_GZIP
  24         select CPU_NO_EFFICIENT_FFS
  25         select HAVE_KERNEL_BZIP2
  26         select HAVE_KERNEL_LZMA
  27         select HAVE_KERNEL_XZ
  28         select HAVE_KERNEL_LZO
  29         select HAVE_UID16
  30         select ARCH_WANT_IPC_PARSE_VERSION
  31         select HAVE_SYSCALL_TRACEPOINTS
  32         select HAVE_REGS_AND_STACK_ACCESS_API
  33         select MAY_HAVE_SPARSE_IRQ
  34         select IRQ_FORCED_THREADING
  35         select RTC_LIB
  36         select GENERIC_ATOMIC64
  37         select GENERIC_IRQ_SHOW
  38         select GENERIC_SMP_IDLE_THREAD
  39         select GENERIC_IDLE_POLL_SETUP
  40         select GENERIC_CLOCKEVENTS
  41         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  42         select GENERIC_PCI_IOMAP if PCI
  43         select GENERIC_SCHED_CLOCK
  44         select GENERIC_STRNCPY_FROM_USER
  45         select GENERIC_STRNLEN_USER
  46         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  47         select MODULES_USE_ELF_RELA
  48         select NO_GENERIC_PCI_IOPORT_MAP if PCI
  49         select OLD_SIGSUSPEND
  50         select OLD_SIGACTION
  51         select PCI_DOMAINS if PCI
  52         select HAVE_ARCH_AUDITSYSCALL
  53         select HAVE_FUTEX_CMPXCHG if FUTEX
  54         select HAVE_NMI
  55         select NEED_SG_DMA_LENGTH
  56
  57         help
  58           The SuperH is a RISC processor targeted for use in embedded systems
  59           and consumer electronics; it was also used in the Sega Dreamcast
  60           gaming console.  The SuperH port has a home page at
  61           <http://www.linux-sh.org/>.
  62
  63 config SUPERH32
  64         def_bool "$(ARCH)" = "sh"
  65         select ARCH_32BIT_OFF_T
  66         select HAVE_KPROBES
  67         select HAVE_KRETPROBES
  68         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  69         select HAVE_FUNCTION_TRACER
  70         select HAVE_FTRACE_MCOUNT_RECORD
  71         select HAVE_DYNAMIC_FTRACE
  72         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  73         select ARCH_WANT_IPC_PARSE_VERSION
  74         select HAVE_FUNCTION_GRAPH_TRACER
  75         select HAVE_ARCH_KGDB
  76         select HAVE_HW_BREAKPOINT
  77         select HAVE_MIXED_BREAKPOINTS_REGS
  78         select PERF_EVENTS
  79         select ARCH_HIBERNATION_POSSIBLE if MMU
  80         select SPARSE_IRQ
  81         select HAVE_STACKPROTECTOR
  82
  83 config SUPERH64
  84         def_bool "$(ARCH)" = "sh64"
  85         select HAVE_EXIT_THREAD
  86         select KALLSYMS
  87
  88 config ARCH_DEFCONFIG
  89         string
  90         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  91         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  92
  93 config RWSEM_GENERIC_SPINLOCK
  94         def_bool y
  95
  96 config RWSEM_XCHGADD_ALGORITHM
  97         bool
  98
  99 config GENERIC_BUG
 100         def_bool y
 101         depends on BUG && SUPERH32
 102
 103 config GENERIC_CSUM
 104         def_bool y
 105         depends on SUPERH64
 106
 107 config GENERIC_HWEIGHT
 108         def_bool y
 109
 110 config GENERIC_CALIBRATE_DELAY
 111         bool
 112
 113 config GENERIC_LOCKBREAK
 114         def_bool y
 115         depends on SMP && PREEMPT
 116
 117 config ARCH_SUSPEND_POSSIBLE
 118         def_bool n
 119
 120 config ARCH_HIBERNATION_POSSIBLE
 121         def_bool n
 122
 123 config SYS_SUPPORTS_APM_EMULATION
 124         bool
 125         select ARCH_SUSPEND_POSSIBLE
 126
 127 config SYS_SUPPORTS_HUGETLBFS
 128         bool
 129
 130 config SYS_SUPPORTS_SMP
 131         bool
 132
 133 config SYS_SUPPORTS_NUMA
 134         bool
 135
 136 config STACKTRACE_SUPPORT
 137         def_bool y
 138
 139 config LOCKDEP_SUPPORT
 140         def_bool y
 141
 142 config ARCH_HAS_ILOG2_U32
 143         def_bool n
 144
 145 config ARCH_HAS_ILOG2_U64
 146         def_bool n
 147
 148 config NO_IOPORT_MAP
 149         def_bool !PCI
 150         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 151                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 152
 153 config IO_TRAPPED
 154         bool
 155
 156 config SWAP_IO_SPACE
 157         bool
 158
 159 config DMA_COHERENT
 160         bool
 161
 162 config DMA_NONCOHERENT
 163         def_bool !DMA_COHERENT
 164         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 165
 166 config PGTABLE_LEVELS
 167         default 3 if X2TLB
 168         default 2
 169
 170 menu "System type"
 171
 172 #
 173 # Processor families
 174 #
 175 config CPU_SH2
 176         bool
 177         select SH_INTC
 178
 179 config CPU_SH2A
 180         bool
 181         select CPU_SH2
 182         select UNCACHED_MAPPING
 183
 184 config CPU_J2
 185         bool
 186         select CPU_SH2
 187         select OF
 188         select OF_EARLY_FLATTREE
 189
 190 config CPU_SH3
 191         bool
 192         select CPU_HAS_INTEVT
 193         select CPU_HAS_SR_RB
 194         select SH_INTC
 195         select SYS_SUPPORTS_SH_TMU
 196
 197 config CPU_SH4
 198         bool
 199         select CPU_HAS_INTEVT
 200         select CPU_HAS_SR_RB
 201         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 202         select SH_INTC
 203         select SYS_SUPPORTS_SH_TMU
 204         select SYS_SUPPORTS_HUGETLBFS if MMU
 205
 206 config CPU_SH4A
 207         bool
 208         select CPU_SH4
 209
 210 config CPU_SH4AL_DSP
 211         bool
 212         select CPU_SH4A
 213         select CPU_HAS_DSP
 214
 215 config CPU_SH5
 216         bool
 217         select CPU_HAS_FPU
 218         select SYS_SUPPORTS_SH_TMU
 219         select SYS_SUPPORTS_HUGETLBFS if MMU
 220
 221 config CPU_SHX2
 222         bool
 223
 224 config CPU_SHX3
 225         bool
 226         select DMA_COHERENT
 227         select SYS_SUPPORTS_SMP
 228         select SYS_SUPPORTS_NUMA
 229
 230 config ARCH_SHMOBILE
 231         bool
 232         select ARCH_SUSPEND_POSSIBLE
 233         select PM
 234
 235 config CPU_HAS_PMU
 236        depends on CPU_SH4 || CPU_SH4A
 237        default y
 238        bool
 239
 240 if SUPERH32
 241
 242 choice
 243         prompt "Processor sub-type selection"
 244
 245 #
 246 # Processor subtypes
 247 #
 248
 249 # SH-2 Processor Support
 250
 251 config CPU_SUBTYPE_SH7619
 252         bool "Support SH7619 processor"
 253         select CPU_SH2
 254         select SYS_SUPPORTS_SH_CMT
 255
 256 config CPU_SUBTYPE_J2
 257         bool "Support J2 processor"
 258         select CPU_J2
 259         select SYS_SUPPORTS_SMP
 260         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 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_SH_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_SH_CMT
 275         select SYS_SUPPORTS_SH_MTU2
 276         select PINCTRL
 277
 278 config CPU_SUBTYPE_SH7206
 279         bool "Support SH7206 processor"
 280         select CPU_SH2A
 281         select SYS_SUPPORTS_SH_CMT
 282         select SYS_SUPPORTS_SH_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_SH_CMT
 289         select SYS_SUPPORTS_SH_MTU2
 290
 291 config CPU_SUBTYPE_SH7264
 292         bool "Support SH7264 processor"
 293         select CPU_SH2A
 294         select CPU_HAS_FPU
 295         select SYS_SUPPORTS_SH_CMT
 296         select SYS_SUPPORTS_SH_MTU2
 297         select PINCTRL
 298
 299 config CPU_SUBTYPE_SH7269
 300         bool "Support SH7269 processor"
 301         select CPU_SH2A
 302         select CPU_HAS_FPU
 303         select SYS_SUPPORTS_SH_CMT
 304         select SYS_SUPPORTS_SH_MTU2
 305         select PINCTRL
 306
 307 config CPU_SUBTYPE_MXG
 308         bool "Support MX-G processor"
 309         select CPU_SH2A
 310         select SYS_SUPPORTS_SH_MTU2
 311         help
 312           Select MX-G if running on an R8A03022BG part.
 313
 314 # SH-3 Processor Support
 315
 316 config CPU_SUBTYPE_SH7705
 317         bool "Support SH7705 processor"
 318         select CPU_SH3
 319
 320 config CPU_SUBTYPE_SH7706
 321         bool "Support SH7706 processor"
 322         select CPU_SH3
 323         help
 324           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 325
 326 config CPU_SUBTYPE_SH7707
 327         bool "Support SH7707 processor"
 328         select CPU_SH3
 329         help
 330           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 331
 332 config CPU_SUBTYPE_SH7708
 333         bool "Support SH7708 processor"
 334         select CPU_SH3
 335         help
 336           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 337           if you have a 100 Mhz SH-3 HD6417708R CPU.
 338
 339 config CPU_SUBTYPE_SH7709
 340         bool "Support SH7709 processor"
 341         select CPU_SH3
 342         help
 343           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 344
 345 config CPU_SUBTYPE_SH7710
 346         bool "Support SH7710 processor"
 347         select CPU_SH3
 348         select CPU_HAS_DSP
 349         help
 350           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 351
 352 config CPU_SUBTYPE_SH7712
 353         bool "Support SH7712 processor"
 354         select CPU_SH3
 355         select CPU_HAS_DSP
 356         help
 357           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 358
 359 config CPU_SUBTYPE_SH7720
 360         bool "Support SH7720 processor"
 361         select CPU_SH3
 362         select CPU_HAS_DSP
 363         select SYS_SUPPORTS_SH_CMT
 364         select USB_OHCI_SH if USB_OHCI_HCD
 365         select PINCTRL
 366         help
 367           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 368
 369 config CPU_SUBTYPE_SH7721
 370         bool "Support SH7721 processor"
 371         select CPU_SH3
 372         select CPU_HAS_DSP
 373         select SYS_SUPPORTS_SH_CMT
 374         select USB_OHCI_SH if USB_OHCI_HCD
 375         help
 376           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 377
 378 # SH-4 Processor Support
 379
 380 config CPU_SUBTYPE_SH7750
 381         bool "Support SH7750 processor"
 382         select CPU_SH4
 383         help
 384           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 385
 386 config CPU_SUBTYPE_SH7091
 387         bool "Support SH7091 processor"
 388         select CPU_SH4
 389         help
 390           Select SH7091 if you have an SH-4 based Sega device (such as
 391           the Dreamcast, Naomi, and Naomi 2).
 392
 393 config CPU_SUBTYPE_SH7750R
 394         bool "Support SH7750R processor"
 395         select CPU_SH4
 396
 397 config CPU_SUBTYPE_SH7750S
 398         bool "Support SH7750S processor"
 399         select CPU_SH4
 400
 401 config CPU_SUBTYPE_SH7751
 402         bool "Support SH7751 processor"
 403         select CPU_SH4
 404         help
 405           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 406           or if you have a HD6417751R CPU.
 407
 408 config CPU_SUBTYPE_SH7751R
 409         bool "Support SH7751R processor"
 410         select CPU_SH4
 411
 412 config CPU_SUBTYPE_SH7760
 413         bool "Support SH7760 processor"
 414         select CPU_SH4
 415
 416 config CPU_SUBTYPE_SH4_202
 417         bool "Support SH4-202 processor"
 418         select CPU_SH4
 419
 420 # SH-4A Processor Support
 421
 422 config CPU_SUBTYPE_SH7723
 423         bool "Support SH7723 processor"
 424         select CPU_SH4A
 425         select CPU_SHX2
 426         select ARCH_SHMOBILE
 427         select ARCH_SPARSEMEM_ENABLE
 428         select SYS_SUPPORTS_SH_CMT
 429         select PINCTRL
 430         help
 431           Select SH7723 if you have an SH-MobileR2 CPU.
 432
 433 config CPU_SUBTYPE_SH7724
 434         bool "Support SH7724 processor"
 435         select CPU_SH4A
 436         select CPU_SHX2
 437         select ARCH_SHMOBILE
 438         select ARCH_SPARSEMEM_ENABLE
 439         select SYS_SUPPORTS_SH_CMT
 440         select PINCTRL
 441         help
 442           Select SH7724 if you have an SH-MobileR2R CPU.
 443
 444 config CPU_SUBTYPE_SH7734
 445         bool "Support SH7734 processor"
 446         select CPU_SH4A
 447         select CPU_SHX2
 448         select PINCTRL
 449         help
 450           Select SH7734 if you have a SH4A SH7734 CPU.
 451
 452 config CPU_SUBTYPE_SH7757
 453         bool "Support SH7757 processor"
 454         select CPU_SH4A
 455         select CPU_SHX2
 456         select PINCTRL
 457         help
 458           Select SH7757 if you have a SH4A SH7757 CPU.
 459
 460 config CPU_SUBTYPE_SH7763
 461         bool "Support SH7763 processor"
 462         select CPU_SH4A
 463         select USB_OHCI_SH if USB_OHCI_HCD
 464         help
 465           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 466
 467 config CPU_SUBTYPE_SH7770
 468         bool "Support SH7770 processor"
 469         select CPU_SH4A
 470
 471 config CPU_SUBTYPE_SH7780
 472         bool "Support SH7780 processor"
 473         select CPU_SH4A
 474
 475 config CPU_SUBTYPE_SH7785
 476         bool "Support SH7785 processor"
 477         select CPU_SH4A
 478         select CPU_SHX2
 479         select ARCH_SPARSEMEM_ENABLE
 480         select SYS_SUPPORTS_NUMA
 481         select PINCTRL
 482
 483 config CPU_SUBTYPE_SH7786
 484         bool "Support SH7786 processor"
 485         select CPU_SH4A
 486         select CPU_SHX3
 487         select CPU_HAS_PTEAEX
 488         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 489         select USB_OHCI_SH if USB_OHCI_HCD
 490         select USB_EHCI_SH if USB_EHCI_HCD
 491         select PINCTRL
 492
 493 config CPU_SUBTYPE_SHX3
 494         bool "Support SH-X3 processor"
 495         select CPU_SH4A
 496         select CPU_SHX3
 497         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 498         select GPIOLIB
 499         select PINCTRL
 500
 501 # SH4AL-DSP Processor Support
 502
 503 config CPU_SUBTYPE_SH7343
 504         bool "Support SH7343 processor"
 505         select CPU_SH4AL_DSP
 506         select ARCH_SHMOBILE
 507         select SYS_SUPPORTS_SH_CMT
 508
 509 config CPU_SUBTYPE_SH7722
 510         bool "Support SH7722 processor"
 511         select CPU_SH4AL_DSP
 512         select CPU_SHX2
 513         select ARCH_SHMOBILE
 514         select ARCH_SPARSEMEM_ENABLE
 515         select SYS_SUPPORTS_NUMA
 516         select SYS_SUPPORTS_SH_CMT
 517         select PINCTRL
 518
 519 config CPU_SUBTYPE_SH7366
 520         bool "Support SH7366 processor"
 521         select CPU_SH4AL_DSP
 522         select CPU_SHX2
 523         select ARCH_SHMOBILE
 524         select ARCH_SPARSEMEM_ENABLE
 525         select SYS_SUPPORTS_NUMA
 526         select SYS_SUPPORTS_SH_CMT
 527
 528 endchoice
 529
 530 endif
 531
 532 if SUPERH64
 533
 534 choice
 535         prompt "Processor sub-type selection"
 536
 537 # SH-5 Processor Support
 538
 539 config CPU_SUBTYPE_SH5_101
 540         bool "Support SH5-101 processor"
 541         select CPU_SH5
 542
 543 config CPU_SUBTYPE_SH5_103
 544         bool "Support SH5-103 processor"
 545         select CPU_SH5
 546
 547 endchoice
 548
 549 endif
 550
 551 source "arch/sh/mm/Kconfig"
 552
 553 source "arch/sh/Kconfig.cpu"
 554
 555 source "arch/sh/boards/Kconfig"
 556
 557 menu "Timer and clock configuration"
 558
 559 config SH_PCLK_FREQ
 560         int "Peripheral clock frequency (in Hz)"
 561         depends on SH_CLK_CPG_LEGACY
 562         default "31250000" if CPU_SUBTYPE_SH7619
 563         default "33333333" if CPU_SUBTYPE_SH7770 || \
 564                               CPU_SUBTYPE_SH7760 || \
 565                               CPU_SUBTYPE_SH7705 || \
 566                               CPU_SUBTYPE_SH7203 || \
 567                               CPU_SUBTYPE_SH7206 || \
 568                               CPU_SUBTYPE_SH7263 || \
 569                               CPU_SUBTYPE_MXG
 570         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 571         default "66000000" if CPU_SUBTYPE_SH4_202
 572         default "50000000"
 573         help
 574           This option is used to specify the peripheral clock frequency.
 575           This is necessary for determining the reference clock value on
 576           platforms lacking an RTC.
 577
 578 config SH_CLK_CPG
 579         def_bool y
 580
 581 config SH_CLK_CPG_LEGACY
 582         depends on SH_CLK_CPG
 583         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 584                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 585                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 586                       !CPU_SUBTYPE_SH7269
 587
 588 endmenu
 589
 590 menu "CPU Frequency scaling"
 591 source "drivers/cpufreq/Kconfig"
 592 endmenu
 593
 594 source "arch/sh/drivers/Kconfig"
 595
 596 endmenu
 597
 598 menu "Kernel features"
 599
 600 source "kernel/Kconfig.hz"
 601
 602 config KEXEC
 603         bool "kexec system call (EXPERIMENTAL)"
 604         depends on SUPERH32 && MMU
 605         select KEXEC_CORE
 606         help
 607           kexec is a system call that implements the ability to shutdown your
 608           current kernel, and to start another kernel.  It is like a reboot
 609           but it is independent of the system firmware.  And like a reboot
 610           you can start any kernel with it, not just Linux.
 611
 612           The name comes from the similarity to the exec system call.
 613
 614           It is an ongoing process to be certain the hardware in a machine
 615           is properly shutdown, so do not be surprised if this code does not
 616           initially work for you.  As of this writing the exact hardware
 617           interface is strongly in flux, so no good recommendation can be
 618           made.
 619
 620 config CRASH_DUMP
 621         bool "kernel crash dumps (EXPERIMENTAL)"
 622         depends on SUPERH32 && BROKEN_ON_SMP
 623         help
 624           Generate crash dump after being started by kexec.
 625           This should be normally only set in special crash dump kernels
 626           which are loaded in the main kernel with kexec-tools into
 627           a specially reserved region and then later executed after
 628           a crash by kdump/kexec. The crash dump kernel must be compiled
 629           to a memory address not used by the main kernel using
 630           PHYSICAL_START.
 631
 632           For more details see Documentation/kdump/kdump.txt
 633
 634 config KEXEC_JUMP
 635         bool "kexec jump (EXPERIMENTAL)"
 636         depends on SUPERH32 && KEXEC && HIBERNATION
 637         help
 638           Jump between original kernel and kexeced kernel and invoke
 639           code via KEXEC
 640
 641 config PHYSICAL_START
 642         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 643         default MEMORY_START
 644         ---help---
 645           This gives the physical address where the kernel is loaded
 646           and is ordinarily the same as MEMORY_START.
 647
 648           Different values are primarily used in the case of kexec on panic
 649           where the fail safe kernel needs to run at a different address
 650           than the panic-ed kernel.
 651
 652 config SECCOMP
 653         bool "Enable seccomp to safely compute untrusted bytecode"
 654         depends on PROC_FS
 655         help
 656           This kernel feature is useful for number crunching applications
 657           that may need to compute untrusted bytecode during their
 658           execution. By using pipes or other transports made available to
 659           the process as file descriptors supporting the read/write
 660           syscalls, it's possible to isolate those applications in
 661           their own address space using seccomp. Once seccomp is
 662           enabled via prctl, it cannot be disabled and the task is only
 663           allowed to execute a few safe syscalls defined by each seccomp
 664           mode.
 665
 666           If unsure, say N.
 667
 668 config SMP
 669         bool "Symmetric multi-processing support"
 670         depends on SYS_SUPPORTS_SMP
 671         ---help---
 672           This enables support for systems with more than one CPU. If you have
 673           a system with only one CPU, say N. If you have a system with more
 674           than one CPU, say Y.
 675
 676           If you say N here, the kernel will run on uni- 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           uniprocessor machines. On a uniprocessor 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/lockup-watchdogs.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
 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 config GUSA
 712         def_bool y
 713         depends on !SMP && SUPERH32
 714         help
 715           This enables support for gUSA (general UserSpace Atomicity).
 716           This is the default implementation for both UP and non-ll/sc
 717           CPUs, and is used by the libc, amongst others.
 718
 719           For additional information, design information can be found
 720           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 721
 722           This should only be disabled for special cases where alternate
 723           atomicity implementations exist.
 724
 725 config GUSA_RB
 726         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 727         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 728         help
 729           Enabling this option will allow the kernel to implement some
 730           atomic operations using a software implementation of load-locked/
 731           store-conditional (LLSC). On machines which do not have hardware
 732           LLSC, this should be more efficient than the other alternative of
 733           disabling interrupts around the atomic sequence.
 734
 735 config HW_PERF_EVENTS
 736         bool "Enable hardware performance counter support for perf events"
 737         depends on PERF_EVENTS && CPU_HAS_PMU
 738         default y
 739         help
 740           Enable hardware performance counter support for perf events. If
 741           disabled, perf events will use software events only.
 742
 743 source "drivers/sh/Kconfig"
 744
 745 endmenu
 746
 747 menu "Boot options"
 748
 749 config USE_BUILTIN_DTB
 750         bool "Use builtin DTB"
 751         default n
 752         depends on SH_DEVICE_TREE
 753         help
 754           Link a device tree blob for particular hardware into the kernel,
 755           suppressing use of the DTB pointer provided by the bootloader.
 756           This option should only be used with legacy bootloaders that are
 757           not capable of providing a DTB to the kernel, or for experimental
 758           hardware without stable device tree bindings.
 759
 760 config BUILTIN_DTB_SOURCE
 761         string "Source file for builtin DTB"
 762         default ""
 763         depends on USE_BUILTIN_DTB
 764         help
 765           Base name (without suffix, relative to arch/sh/boot/dts) for the
 766           a DTS file that will be used to produce the DTB linked into the
 767           kernel.
 768
 769 config ZERO_PAGE_OFFSET
 770         hex
 771         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 772                                 SH_7751_SOLUTION_ENGINE
 773         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 774         default "0x00002000" if PAGE_SIZE_8KB
 775         default "0x00001000"
 776         help
 777           This sets the default offset of zero page.
 778
 779 config BOOT_LINK_OFFSET
 780         hex
 781         default "0x00210000" if SH_SHMIN
 782         default "0x00400000" if SH_CAYMAN
 783         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 784         default "0x009e0000" if SH_TITAN
 785         default "0x01800000" if SH_SDK7780
 786         default "0x02000000" if SH_EDOSK7760
 787         default "0x00800000"
 788         help
 789           This option allows you to set the link address offset of the zImage.
 790           This can be useful if you are on a board which has a small amount of
 791           memory.
 792
 793 config ENTRY_OFFSET
 794         hex
 795         default "0x00001000" if PAGE_SIZE_4KB
 796         default "0x00002000" if PAGE_SIZE_8KB
 797         default "0x00004000" if PAGE_SIZE_16KB
 798         default "0x00010000" if PAGE_SIZE_64KB
 799         default "0x00000000"
 800
 801 config ROMIMAGE_MMCIF
 802         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 803         depends on CPU_SUBTYPE_SH7724
 804         help
 805           Say Y here to include experimental MMCIF loading code in
 806           romImage. With this enabled it is possible to write the romImage
 807           kernel image to an MMC card and boot the kernel straight from
 808           the reset vector. At reset the processor Mask ROM will load the
 809           first part of the romImage which in turn loads the rest the kernel
 810           image to RAM using the MMCIF hardware block.
 811
 812 choice
 813         prompt "Kernel command line"
 814         optional
 815         default CMDLINE_OVERWRITE
 816         help
 817           Setting this option allows the kernel command line arguments
 818           to be set.
 819
 820 config CMDLINE_OVERWRITE
 821         bool "Overwrite bootloader kernel arguments"
 822         help
 823           Given string will overwrite any arguments passed in by
 824           a bootloader.
 825
 826 config CMDLINE_EXTEND
 827         bool "Extend bootloader kernel arguments"
 828         help
 829           Given string will be concatenated with arguments passed in
 830           by a bootloader.
 831
 832 endchoice
 833
 834 config CMDLINE
 835         string "Kernel command line arguments string"
 836         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 837         default "console=ttySC1,115200"
 838
 839 endmenu
 840
 841 menu "Bus options"
 842
 843 config SUPERHYWAY
 844         tristate "SuperHyway Bus support"
 845         depends on CPU_SUBTYPE_SH4_202
 846
 847 config MAPLE
 848         bool "Maple Bus support"
 849         depends on SH_DREAMCAST
 850         help
 851          The Maple Bus is SEGA's serial communication bus for peripherals
 852          on the Dreamcast. Without this bus support you won't be able to
 853          get your Dreamcast keyboard etc to work, so most users
 854          probably want to say 'Y' here, unless you are only using the
 855          Dreamcast with a serial line terminal or a remote network
 856          connection.
 857
 858 endmenu
 859
 860 menu "Power management options (EXPERIMENTAL)"
 861
 862 source "kernel/power/Kconfig"
 863
 864 source "drivers/cpuidle/Kconfig"
 865
 866 endmenu