arch/sh/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config SUPERH
   3         def_bool y
   4         select ARCH_32BIT_OFF_T
   5         select ARCH_HAVE_CUSTOM_GPIO_H
   6         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
   7         select ARCH_HAS_BINFMT_FLAT if !MMU
   8         select ARCH_HAS_GIGANTIC_PAGE
   9         select ARCH_HAS_GCOV_PROFILE_ALL
  10         select ARCH_HAS_PTE_SPECIAL
  11         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  12         select ARCH_HIBERNATION_POSSIBLE if MMU
  13         select ARCH_MIGHT_HAVE_PC_PARPORT
  14         select ARCH_WANT_IPC_PARSE_VERSION
  15         select CLKDEV_LOOKUP
  16         select CPU_NO_EFFICIENT_FFS
  17         select DMA_DECLARE_COHERENT
  18         select GENERIC_ATOMIC64
  19         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  20         select GENERIC_IDLE_POLL_SETUP
  21         select GENERIC_IRQ_SHOW
  22         select GENERIC_PCI_IOMAP if PCI
  23         select GENERIC_SCHED_CLOCK
  24         select GENERIC_STRNCPY_FROM_USER
  25         select GENERIC_STRNLEN_USER
  26         select GENERIC_SMP_IDLE_THREAD
  27         select GUP_GET_PTE_LOW_HIGH if X2TLB
  28         select HAVE_ARCH_AUDITSYSCALL
  29         select HAVE_ARCH_KGDB
  30         select HAVE_ARCH_SECCOMP_FILTER
  31         select HAVE_ARCH_TRACEHOOK
  32         select HAVE_DEBUG_BUGVERBOSE
  33         select HAVE_DEBUG_KMEMLEAK
  34         select HAVE_DYNAMIC_FTRACE
  35         select HAVE_FAST_GUP if MMU
  36         select HAVE_FUNCTION_GRAPH_TRACER
  37         select HAVE_FUNCTION_TRACER
  38         select HAVE_FUTEX_CMPXCHG if FUTEX
  39         select HAVE_FTRACE_MCOUNT_RECORD
  40         select HAVE_HW_BREAKPOINT
  41         select HAVE_IDE if HAS_IOPORT_MAP
  42         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  43         select HAVE_KERNEL_BZIP2
  44         select HAVE_KERNEL_GZIP
  45         select HAVE_KERNEL_LZMA
  46         select HAVE_KERNEL_LZO
  47         select HAVE_KERNEL_XZ
  48         select HAVE_KPROBES
  49         select HAVE_KRETPROBES
  50         select HAVE_MIXED_BREAKPOINTS_REGS
  51         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  52         select HAVE_NMI
  53         select HAVE_OPROFILE
  54         select HAVE_PATA_PLATFORM
  55         select HAVE_PERF_EVENTS
  56         select HAVE_REGS_AND_STACK_ACCESS_API
  57         select HAVE_UID16
  58         select HAVE_STACKPROTECTOR
  59         select HAVE_SYSCALL_TRACEPOINTS
  60         select IRQ_FORCED_THREADING
  61         select MAY_HAVE_SPARSE_IRQ
  62         select MODULES_USE_ELF_RELA
  63         select NEED_SG_DMA_LENGTH
  64         select NO_DMA if !MMU && !DMA_COHERENT
  65         select NO_GENERIC_PCI_IOPORT_MAP if PCI
  66         select OLD_SIGACTION
  67         select OLD_SIGSUSPEND
  68         select PCI_DOMAINS if PCI
  69         select PERF_EVENTS
  70         select PERF_USE_VMALLOC
  71         select RTC_LIB
  72         select SET_FS
  73         select SPARSE_IRQ
  74         help
  75           The SuperH is a RISC processor targeted for use in embedded systems
  76           and consumer electronics; it was also used in the Sega Dreamcast
  77           gaming console.  The SuperH port has a home page at
  78           <http://www.linux-sh.org/>.
  79
  80 config GENERIC_BUG
  81         def_bool y
  82         depends on BUG
  83
  84 config GENERIC_HWEIGHT
  85         def_bool y
  86
  87 config GENERIC_CALIBRATE_DELAY
  88         bool
  89
  90 config GENERIC_LOCKBREAK
  91         def_bool y
  92         depends on SMP && PREEMPTION
  93
  94 config ARCH_SUSPEND_POSSIBLE
  95         def_bool n
  96
  97 config ARCH_HIBERNATION_POSSIBLE
  98         def_bool n
  99
 100 config SYS_SUPPORTS_APM_EMULATION
 101         bool
 102         select ARCH_SUSPEND_POSSIBLE
 103
 104 config SYS_SUPPORTS_HUGETLBFS
 105         bool
 106
 107 config SYS_SUPPORTS_SMP
 108         bool
 109
 110 config SYS_SUPPORTS_NUMA
 111         bool
 112
 113 config STACKTRACE_SUPPORT
 114         def_bool y
 115
 116 config LOCKDEP_SUPPORT
 117         def_bool y
 118
 119 config ARCH_HAS_ILOG2_U32
 120         def_bool n
 121
 122 config ARCH_HAS_ILOG2_U64
 123         def_bool n
 124
 125 config NO_IOPORT_MAP
 126         def_bool !PCI
 127         depends on !SH_SH4202_MICRODEV && !SH_SHMIN && !SH_HP6XX && \
 128                    !SH_SOLUTION_ENGINE
 129
 130 config IO_TRAPPED
 131         bool
 132
 133 config SWAP_IO_SPACE
 134         bool
 135
 136 config DMA_COHERENT
 137         bool
 138
 139 config DMA_NONCOHERENT
 140         def_bool !NO_DMA && !DMA_COHERENT
 141         select ARCH_HAS_DMA_PREP_COHERENT
 142         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 143         select DMA_DIRECT_REMAP
 144
 145 config PGTABLE_LEVELS
 146         default 3 if X2TLB
 147         default 2
 148
 149 menu "System type"
 150
 151 #
 152 # Processor families
 153 #
 154 config CPU_SH2
 155         bool
 156         select SH_INTC
 157
 158 config CPU_SH2A
 159         bool
 160         select CPU_SH2
 161         select UNCACHED_MAPPING
 162
 163 config CPU_J2
 164         bool
 165         select CPU_SH2
 166         select OF
 167         select OF_EARLY_FLATTREE
 168
 169 config CPU_SH3
 170         bool
 171         select CPU_HAS_INTEVT
 172         select CPU_HAS_SR_RB
 173         select SH_INTC
 174         select SYS_SUPPORTS_SH_TMU
 175
 176 config CPU_SH4
 177         bool
 178         select CPU_HAS_INTEVT
 179         select CPU_HAS_SR_RB
 180         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 181         select SH_INTC
 182         select SYS_SUPPORTS_SH_TMU
 183         select SYS_SUPPORTS_HUGETLBFS if MMU
 184
 185 config CPU_SH4A
 186         bool
 187         select CPU_SH4
 188
 189 config CPU_SH4AL_DSP
 190         bool
 191         select CPU_SH4A
 192         select CPU_HAS_DSP
 193
 194 config CPU_SHX2
 195         bool
 196
 197 config CPU_SHX3
 198         bool
 199         select DMA_COHERENT
 200         select SYS_SUPPORTS_SMP
 201         select SYS_SUPPORTS_NUMA
 202
 203 config ARCH_SHMOBILE
 204         bool
 205         select ARCH_SUSPEND_POSSIBLE
 206         select PM
 207
 208 config CPU_HAS_PMU
 209        depends on CPU_SH4 || CPU_SH4A
 210        default y
 211        bool
 212
 213 choice
 214         prompt "Processor sub-type selection"
 215
 216 #
 217 # Processor subtypes
 218 #
 219
 220 # SH-2 Processor Support
 221
 222 config CPU_SUBTYPE_SH7619
 223         bool "Support SH7619 processor"
 224         select CPU_SH2
 225         select SYS_SUPPORTS_SH_CMT
 226
 227 config CPU_SUBTYPE_J2
 228         bool "Support J2 processor"
 229         select CPU_J2
 230         select SYS_SUPPORTS_SMP
 231         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 232
 233 # SH-2A Processor Support
 234
 235 config CPU_SUBTYPE_SH7201
 236         bool "Support SH7201 processor"
 237         select CPU_SH2A
 238         select CPU_HAS_FPU
 239         select SYS_SUPPORTS_SH_MTU2
 240
 241 config CPU_SUBTYPE_SH7203
 242         bool "Support SH7203 processor"
 243         select CPU_SH2A
 244         select CPU_HAS_FPU
 245         select SYS_SUPPORTS_SH_CMT
 246         select SYS_SUPPORTS_SH_MTU2
 247         select PINCTRL
 248
 249 config CPU_SUBTYPE_SH7206
 250         bool "Support SH7206 processor"
 251         select CPU_SH2A
 252         select SYS_SUPPORTS_SH_CMT
 253         select SYS_SUPPORTS_SH_MTU2
 254
 255 config CPU_SUBTYPE_SH7263
 256         bool "Support SH7263 processor"
 257         select CPU_SH2A
 258         select CPU_HAS_FPU
 259         select SYS_SUPPORTS_SH_CMT
 260         select SYS_SUPPORTS_SH_MTU2
 261
 262 config CPU_SUBTYPE_SH7264
 263         bool "Support SH7264 processor"
 264         select CPU_SH2A
 265         select CPU_HAS_FPU
 266         select SYS_SUPPORTS_SH_CMT
 267         select SYS_SUPPORTS_SH_MTU2
 268         select PINCTRL
 269
 270 config CPU_SUBTYPE_SH7269
 271         bool "Support SH7269 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_MXG
 279         bool "Support MX-G processor"
 280         select CPU_SH2A
 281         select SYS_SUPPORTS_SH_MTU2
 282         help
 283           Select MX-G if running on an R8A03022BG part.
 284
 285 # SH-3 Processor Support
 286
 287 config CPU_SUBTYPE_SH7705
 288         bool "Support SH7705 processor"
 289         select CPU_SH3
 290
 291 config CPU_SUBTYPE_SH7706
 292         bool "Support SH7706 processor"
 293         select CPU_SH3
 294         help
 295           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 296
 297 config CPU_SUBTYPE_SH7707
 298         bool "Support SH7707 processor"
 299         select CPU_SH3
 300         help
 301           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 302
 303 config CPU_SUBTYPE_SH7708
 304         bool "Support SH7708 processor"
 305         select CPU_SH3
 306         help
 307           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 308           if you have a 100 Mhz SH-3 HD6417708R CPU.
 309
 310 config CPU_SUBTYPE_SH7709
 311         bool "Support SH7709 processor"
 312         select CPU_SH3
 313         help
 314           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 315
 316 config CPU_SUBTYPE_SH7710
 317         bool "Support SH7710 processor"
 318         select CPU_SH3
 319         select CPU_HAS_DSP
 320         help
 321           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 322
 323 config CPU_SUBTYPE_SH7712
 324         bool "Support SH7712 processor"
 325         select CPU_SH3
 326         select CPU_HAS_DSP
 327         help
 328           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 329
 330 config CPU_SUBTYPE_SH7720
 331         bool "Support SH7720 processor"
 332         select CPU_SH3
 333         select CPU_HAS_DSP
 334         select SYS_SUPPORTS_SH_CMT
 335         select USB_OHCI_SH if USB_OHCI_HCD
 336         select PINCTRL
 337         help
 338           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 339
 340 config CPU_SUBTYPE_SH7721
 341         bool "Support SH7721 processor"
 342         select CPU_SH3
 343         select CPU_HAS_DSP
 344         select SYS_SUPPORTS_SH_CMT
 345         select USB_OHCI_SH if USB_OHCI_HCD
 346         help
 347           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 348
 349 # SH-4 Processor Support
 350
 351 config CPU_SUBTYPE_SH7750
 352         bool "Support SH7750 processor"
 353         select CPU_SH4
 354         help
 355           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 356
 357 config CPU_SUBTYPE_SH7091
 358         bool "Support SH7091 processor"
 359         select CPU_SH4
 360         help
 361           Select SH7091 if you have an SH-4 based Sega device (such as
 362           the Dreamcast, Naomi, and Naomi 2).
 363
 364 config CPU_SUBTYPE_SH7750R
 365         bool "Support SH7750R processor"
 366         select CPU_SH4
 367
 368 config CPU_SUBTYPE_SH7750S
 369         bool "Support SH7750S processor"
 370         select CPU_SH4
 371
 372 config CPU_SUBTYPE_SH7751
 373         bool "Support SH7751 processor"
 374         select CPU_SH4
 375         help
 376           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 377           or if you have a HD6417751R CPU.
 378
 379 config CPU_SUBTYPE_SH7751R
 380         bool "Support SH7751R processor"
 381         select CPU_SH4
 382
 383 config CPU_SUBTYPE_SH7760
 384         bool "Support SH7760 processor"
 385         select CPU_SH4
 386
 387 config CPU_SUBTYPE_SH4_202
 388         bool "Support SH4-202 processor"
 389         select CPU_SH4
 390
 391 # SH-4A Processor Support
 392
 393 config CPU_SUBTYPE_SH7723
 394         bool "Support SH7723 processor"
 395         select CPU_SH4A
 396         select CPU_SHX2
 397         select ARCH_SHMOBILE
 398         select ARCH_SPARSEMEM_ENABLE
 399         select SYS_SUPPORTS_SH_CMT
 400         select PINCTRL
 401         help
 402           Select SH7723 if you have an SH-MobileR2 CPU.
 403
 404 config CPU_SUBTYPE_SH7724
 405         bool "Support SH7724 processor"
 406         select CPU_SH4A
 407         select CPU_SHX2
 408         select ARCH_SHMOBILE
 409         select ARCH_SPARSEMEM_ENABLE
 410         select SYS_SUPPORTS_SH_CMT
 411         select PINCTRL
 412         help
 413           Select SH7724 if you have an SH-MobileR2R CPU.
 414
 415 config CPU_SUBTYPE_SH7734
 416         bool "Support SH7734 processor"
 417         select CPU_SH4A
 418         select CPU_SHX2
 419         select PINCTRL
 420         help
 421           Select SH7734 if you have a SH4A SH7734 CPU.
 422
 423 config CPU_SUBTYPE_SH7757
 424         bool "Support SH7757 processor"
 425         select CPU_SH4A
 426         select CPU_SHX2
 427         select PINCTRL
 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         select USB_OHCI_SH if USB_OHCI_HCD
 435         help
 436           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 437
 438 config CPU_SUBTYPE_SH7770
 439         bool "Support SH7770 processor"
 440         select CPU_SH4A
 441
 442 config CPU_SUBTYPE_SH7780
 443         bool "Support SH7780 processor"
 444         select CPU_SH4A
 445
 446 config CPU_SUBTYPE_SH7785
 447         bool "Support SH7785 processor"
 448         select CPU_SH4A
 449         select CPU_SHX2
 450         select ARCH_SPARSEMEM_ENABLE
 451         select SYS_SUPPORTS_NUMA
 452         select PINCTRL
 453
 454 config CPU_SUBTYPE_SH7786
 455         bool "Support SH7786 processor"
 456         select CPU_SH4A
 457         select CPU_SHX3
 458         select CPU_HAS_PTEAEX
 459         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 460         select USB_OHCI_SH if USB_OHCI_HCD
 461         select USB_EHCI_SH if USB_EHCI_HCD
 462         select PINCTRL
 463
 464 config CPU_SUBTYPE_SHX3
 465         bool "Support SH-X3 processor"
 466         select CPU_SH4A
 467         select CPU_SHX3
 468         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 469         select GPIOLIB
 470         select PINCTRL
 471
 472 # SH4AL-DSP Processor Support
 473
 474 config CPU_SUBTYPE_SH7343
 475         bool "Support SH7343 processor"
 476         select CPU_SH4AL_DSP
 477         select ARCH_SHMOBILE
 478         select SYS_SUPPORTS_SH_CMT
 479
 480 config CPU_SUBTYPE_SH7722
 481         bool "Support SH7722 processor"
 482         select CPU_SH4AL_DSP
 483         select CPU_SHX2
 484         select ARCH_SHMOBILE
 485         select ARCH_SPARSEMEM_ENABLE
 486         select SYS_SUPPORTS_NUMA
 487         select SYS_SUPPORTS_SH_CMT
 488         select PINCTRL
 489
 490 config CPU_SUBTYPE_SH7366
 491         bool "Support SH7366 processor"
 492         select CPU_SH4AL_DSP
 493         select CPU_SHX2
 494         select ARCH_SHMOBILE
 495         select ARCH_SPARSEMEM_ENABLE
 496         select SYS_SUPPORTS_NUMA
 497         select SYS_SUPPORTS_SH_CMT
 498
 499 endchoice
 500
 501 source "arch/sh/mm/Kconfig"
 502
 503 source "arch/sh/Kconfig.cpu"
 504
 505 source "arch/sh/boards/Kconfig"
 506
 507 menu "Timer and clock configuration"
 508
 509 config SH_PCLK_FREQ
 510         int "Peripheral clock frequency (in Hz)"
 511         depends on SH_CLK_CPG_LEGACY
 512         default "31250000" if CPU_SUBTYPE_SH7619
 513         default "33333333" if CPU_SUBTYPE_SH7770 || \
 514                               CPU_SUBTYPE_SH7760 || \
 515                               CPU_SUBTYPE_SH7705 || \
 516                               CPU_SUBTYPE_SH7203 || \
 517                               CPU_SUBTYPE_SH7206 || \
 518                               CPU_SUBTYPE_SH7263 || \
 519                               CPU_SUBTYPE_MXG
 520         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 521         default "66000000" if CPU_SUBTYPE_SH4_202
 522         default "50000000"
 523         help
 524           This option is used to specify the peripheral clock frequency.
 525           This is necessary for determining the reference clock value on
 526           platforms lacking an RTC.
 527
 528 config SH_CLK_CPG
 529         def_bool y
 530
 531 config SH_CLK_CPG_LEGACY
 532         depends on SH_CLK_CPG
 533         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 534                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 535                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 536                       !CPU_SUBTYPE_SH7269
 537
 538 endmenu
 539
 540 menu "CPU Frequency scaling"
 541 source "drivers/cpufreq/Kconfig"
 542 endmenu
 543
 544 source "arch/sh/drivers/Kconfig"
 545
 546 endmenu
 547
 548 menu "Kernel features"
 549
 550 source "kernel/Kconfig.hz"
 551
 552 config KEXEC
 553         bool "kexec system call (EXPERIMENTAL)"
 554         depends on MMU
 555         select KEXEC_CORE
 556         help
 557           kexec is a system call that implements the ability to shutdown your
 558           current kernel, and to start another kernel.  It is like a reboot
 559           but it is independent of the system firmware.  And like a reboot
 560           you can start any kernel with it, not just Linux.
 561
 562           The name comes from the similarity to the exec system call.
 563
 564           It is an ongoing process to be certain the hardware in a machine
 565           is properly shutdown, so do not be surprised if this code does not
 566           initially work for you.  As of this writing the exact hardware
 567           interface is strongly in flux, so no good recommendation can be
 568           made.
 569
 570 config CRASH_DUMP
 571         bool "kernel crash dumps (EXPERIMENTAL)"
 572         depends on BROKEN_ON_SMP
 573         help
 574           Generate crash dump after being started by kexec.
 575           This should be normally only set in special crash dump kernels
 576           which are loaded in the main kernel with kexec-tools into
 577           a specially reserved region and then later executed after
 578           a crash by kdump/kexec. The crash dump kernel must be compiled
 579           to a memory address not used by the main kernel using
 580           PHYSICAL_START.
 581
 582           For more details see Documentation/admin-guide/kdump/kdump.rst
 583
 584 config KEXEC_JUMP
 585         bool "kexec jump (EXPERIMENTAL)"
 586         depends on KEXEC && HIBERNATION
 587         help
 588           Jump between original kernel and kexeced kernel and invoke
 589           code via KEXEC
 590
 591 config PHYSICAL_START
 592         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 593         default MEMORY_START
 594         help
 595           This gives the physical address where the kernel is loaded
 596           and is ordinarily the same as MEMORY_START.
 597
 598           Different values are primarily used in the case of kexec on panic
 599           where the fail safe kernel needs to run at a different address
 600           than the panic-ed kernel.
 601
 602 config SMP
 603         bool "Symmetric multi-processing support"
 604         depends on SYS_SUPPORTS_SMP
 605         help
 606           This enables support for systems with more than one CPU. If you have
 607           a system with only one CPU, say N. If you have a system with more
 608           than one CPU, say Y.
 609
 610           If you say N here, the kernel will run on uni- and multiprocessor
 611           machines, but will use only one CPU of a multiprocessor machine. If
 612           you say Y here, the kernel will run on many, but not all,
 613           uniprocessor machines. On a uniprocessor machine, the kernel
 614           will run faster if you say N here.
 615
 616           People using multiprocessor machines who say Y here should also say
 617           Y to "Enhanced Real Time Clock Support", below.
 618
 619           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
 620           available at <https://www.tldp.org/docs.html#howto>.
 621
 622           If you don't know what to do here, say N.
 623
 624 config NR_CPUS
 625         int "Maximum number of CPUs (2-32)"
 626         range 2 32
 627         depends on SMP
 628         default "4" if CPU_SUBTYPE_SHX3
 629         default "2"
 630         help
 631           This allows you to specify the maximum number of CPUs which this
 632           kernel will support.  The maximum supported value is 32 and the
 633           minimum value which makes sense is 2.
 634
 635           This is purely to save memory - each supported CPU adds
 636           approximately eight kilobytes to the kernel image.
 637
 638 config HOTPLUG_CPU
 639         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 640         depends on SMP
 641         help
 642           Say Y here to experiment with turning CPUs off and on.  CPUs
 643           can be controlled through /sys/devices/system/cpu.
 644
 645 config GUSA
 646         def_bool y
 647         depends on !SMP
 648         help
 649           This enables support for gUSA (general UserSpace Atomicity).
 650           This is the default implementation for both UP and non-ll/sc
 651           CPUs, and is used by the libc, amongst others.
 652
 653           For additional information, design information can be found
 654           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 655
 656           This should only be disabled for special cases where alternate
 657           atomicity implementations exist.
 658
 659 config GUSA_RB
 660         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 661         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 662         help
 663           Enabling this option will allow the kernel to implement some
 664           atomic operations using a software implementation of load-locked/
 665           store-conditional (LLSC). On machines which do not have hardware
 666           LLSC, this should be more efficient than the other alternative of
 667           disabling interrupts around the atomic sequence.
 668
 669 config HW_PERF_EVENTS
 670         bool "Enable hardware performance counter support for perf events"
 671         depends on PERF_EVENTS && CPU_HAS_PMU
 672         default y
 673         help
 674           Enable hardware performance counter support for perf events. If
 675           disabled, perf events will use software events only.
 676
 677 source "drivers/sh/Kconfig"
 678
 679 endmenu
 680
 681 menu "Boot options"
 682
 683 config USE_BUILTIN_DTB
 684         bool "Use builtin DTB"
 685         default n
 686         depends on SH_DEVICE_TREE
 687         help
 688           Link a device tree blob for particular hardware into the kernel,
 689           suppressing use of the DTB pointer provided by the bootloader.
 690           This option should only be used with legacy bootloaders that are
 691           not capable of providing a DTB to the kernel, or for experimental
 692           hardware without stable device tree bindings.
 693
 694 config BUILTIN_DTB_SOURCE
 695         string "Source file for builtin DTB"
 696         default ""
 697         depends on USE_BUILTIN_DTB
 698         help
 699           Base name (without suffix, relative to arch/sh/boot/dts) for the
 700           a DTS file that will be used to produce the DTB linked into the
 701           kernel.
 702
 703 config ZERO_PAGE_OFFSET
 704         hex
 705         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 706                                 SH_7751_SOLUTION_ENGINE
 707         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 708         default "0x00002000" if PAGE_SIZE_8KB
 709         default "0x00001000"
 710         help
 711           This sets the default offset of zero page.
 712
 713 config BOOT_LINK_OFFSET
 714         hex
 715         default "0x00210000" if SH_SHMIN
 716         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 717         default "0x009e0000" if SH_TITAN
 718         default "0x01800000" if SH_SDK7780
 719         default "0x02000000" if SH_EDOSK7760
 720         default "0x00800000"
 721         help
 722           This option allows you to set the link address offset of the zImage.
 723           This can be useful if you are on a board which has a small amount of
 724           memory.
 725
 726 config ENTRY_OFFSET
 727         hex
 728         default "0x00001000" if PAGE_SIZE_4KB
 729         default "0x00002000" if PAGE_SIZE_8KB
 730         default "0x00004000" if PAGE_SIZE_16KB
 731         default "0x00010000" if PAGE_SIZE_64KB
 732         default "0x00000000"
 733
 734 config ROMIMAGE_MMCIF
 735         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 736         depends on CPU_SUBTYPE_SH7724
 737         help
 738           Say Y here to include experimental MMCIF loading code in
 739           romImage. With this enabled it is possible to write the romImage
 740           kernel image to an MMC card and boot the kernel straight from
 741           the reset vector. At reset the processor Mask ROM will load the
 742           first part of the romImage which in turn loads the rest the kernel
 743           image to RAM using the MMCIF hardware block.
 744
 745 choice
 746         prompt "Kernel command line"
 747         optional
 748         default CMDLINE_OVERWRITE
 749         help
 750           Setting this option allows the kernel command line arguments
 751           to be set.
 752
 753 config CMDLINE_OVERWRITE
 754         bool "Overwrite bootloader kernel arguments"
 755         help
 756           Given string will overwrite any arguments passed in by
 757           a bootloader.
 758
 759 config CMDLINE_EXTEND
 760         bool "Extend bootloader kernel arguments"
 761         help
 762           Given string will be concatenated with arguments passed in
 763           by a bootloader.
 764
 765 endchoice
 766
 767 config CMDLINE
 768         string "Kernel command line arguments string"
 769         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 770         default "console=ttySC1,115200"
 771
 772 endmenu
 773
 774 menu "Bus options"
 775
 776 config SUPERHYWAY
 777         tristate "SuperHyway Bus support"
 778         depends on CPU_SUBTYPE_SH4_202
 779
 780 config MAPLE
 781         bool "Maple Bus support"
 782         depends on SH_DREAMCAST
 783         help
 784          The Maple Bus is SEGA's serial communication bus for peripherals
 785          on the Dreamcast. Without this bus support you won't be able to
 786          get your Dreamcast keyboard etc to work, so most users
 787          probably want to say 'Y' here, unless you are only using the
 788          Dreamcast with a serial line terminal or a remote network
 789          connection.
 790
 791 endmenu
 792
 793 menu "Power management options (EXPERIMENTAL)"
 794
 795 source "kernel/power/Kconfig"
 796
 797 source "drivers/cpuidle/Kconfig"
 798
 799 endmenu