1config SUPERH 2 def_bool y 3 select EXPERT 4 select CLKDEV_LOOKUP 5 select HAVE_IDE if HAS_IOPORT 6 select HAVE_MEMBLOCK 7 select HAVE_MEMBLOCK_NODE_MAP 8 select ARCH_DISCARD_MEMBLOCK 9 select HAVE_OPROFILE 10 select HAVE_GENERIC_DMA_COHERENT 11 select HAVE_ARCH_TRACEHOOK 12 select HAVE_DMA_API_DEBUG 13 select HAVE_DMA_ATTRS 14 select HAVE_IRQ_WORK 15 select HAVE_PERF_EVENTS 16 select HAVE_DEBUG_BUGVERBOSE 17 select ARCH_HAVE_CUSTOM_GPIO_H 18 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 19 select PERF_USE_VMALLOC 20 select HAVE_DEBUG_KMEMLEAK 21 select HAVE_KERNEL_GZIP 22 select HAVE_KERNEL_BZIP2 23 select HAVE_KERNEL_LZMA 24 select HAVE_KERNEL_XZ 25 select HAVE_KERNEL_LZO 26 select HAVE_UID16 27 select ARCH_WANT_IPC_PARSE_VERSION 28 select HAVE_SYSCALL_TRACEPOINTS 29 select HAVE_REGS_AND_STACK_ACCESS_API 30 select HAVE_GENERIC_HARDIRQS 31 select MAY_HAVE_SPARSE_IRQ 32 select IRQ_FORCED_THREADING 33 select RTC_LIB 34 select GENERIC_ATOMIC64 35 select GENERIC_IRQ_SHOW 36 select GENERIC_SMP_IDLE_THREAD 37 select GENERIC_CLOCKEVENTS 38 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 39 select GENERIC_STRNCPY_FROM_USER 40 select GENERIC_STRNLEN_USER 41 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 42 select MODULES_USE_ELF_RELA 43 help 44 The SuperH is a RISC processor targeted for use in embedded systems 45 and consumer electronics; it was also used in the Sega Dreamcast 46 gaming console. The SuperH port has a home page at 47 <http://www.linux-sh.org/>. 48 49config SUPERH32 50 def_bool ARCH = "sh" 51 select HAVE_KPROBES 52 select HAVE_KRETPROBES 53 select HAVE_IOREMAP_PROT if MMU && !X2TLB 54 select HAVE_FUNCTION_TRACER 55 select HAVE_FTRACE_MCOUNT_RECORD 56 select HAVE_DYNAMIC_FTRACE 57 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 58 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 59 select ARCH_WANT_IPC_PARSE_VERSION 60 select HAVE_FUNCTION_GRAPH_TRACER 61 select HAVE_ARCH_KGDB 62 select HAVE_HW_BREAKPOINT 63 select HAVE_MIXED_BREAKPOINTS_REGS 64 select PERF_EVENTS 65 select ARCH_HIBERNATION_POSSIBLE if MMU 66 select SPARSE_IRQ 67 68config SUPERH64 69 def_bool ARCH = "sh64" 70 select KALLSYMS 71 72config ARCH_DEFCONFIG 73 string 74 default "arch/sh/configs/shx3_defconfig" if SUPERH32 75 default "arch/sh/configs/cayman_defconfig" if SUPERH64 76 77config RWSEM_GENERIC_SPINLOCK 78 def_bool y 79 80config RWSEM_XCHGADD_ALGORITHM 81 bool 82 83config GENERIC_BUG 84 def_bool y 85 depends on BUG && SUPERH32 86 87config GENERIC_CSUM 88 def_bool y 89 depends on SUPERH64 90 91config GENERIC_HWEIGHT 92 def_bool y 93 94config IRQ_PER_CPU 95 def_bool y 96 97config GENERIC_GPIO 98 def_bool n 99 100config GENERIC_CALIBRATE_DELAY 101 bool 102 103config GENERIC_LOCKBREAK 104 def_bool y 105 depends on SMP && PREEMPT 106 107config ARCH_SUSPEND_POSSIBLE 108 def_bool n 109 110config ARCH_HIBERNATION_POSSIBLE 111 def_bool n 112 113config SYS_SUPPORTS_APM_EMULATION 114 bool 115 select ARCH_SUSPEND_POSSIBLE 116 117config SYS_SUPPORTS_HUGETLBFS 118 bool 119 120config SYS_SUPPORTS_SMP 121 bool 122 123config SYS_SUPPORTS_NUMA 124 bool 125 126config SYS_SUPPORTS_PCI 127 bool 128 129config SYS_SUPPORTS_CMT 130 bool 131 132config SYS_SUPPORTS_MTU2 133 bool 134 135config SYS_SUPPORTS_TMU 136 bool 137 138config STACKTRACE_SUPPORT 139 def_bool y 140 141config LOCKDEP_SUPPORT 142 def_bool y 143 144config HAVE_LATENCYTOP_SUPPORT 145 def_bool y 146 147config ARCH_HAS_ILOG2_U32 148 def_bool n 149 150config ARCH_HAS_ILOG2_U64 151 def_bool n 152 153config ARCH_NO_VIRT_TO_BUS 154 def_bool y 155 156config ARCH_HAS_DEFAULT_IDLE 157 def_bool y 158 159config NO_IOPORT 160 def_bool !PCI 161 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 162 !SH_HP6XX && !SH_SOLUTION_ENGINE 163 164config IO_TRAPPED 165 bool 166 167config SWAP_IO_SPACE 168 bool 169 170config DMA_COHERENT 171 bool 172 173config DMA_NONCOHERENT 174 def_bool !DMA_COHERENT 175 176config NEED_DMA_MAP_STATE 177 def_bool DMA_NONCOHERENT 178 179config NEED_SG_DMA_LENGTH 180 def_bool y 181 182source "init/Kconfig" 183 184source "kernel/Kconfig.freezer" 185 186menu "System type" 187 188# 189# Processor families 190# 191config CPU_SH2 192 bool 193 194config CPU_SH2A 195 bool 196 select CPU_SH2 197 select UNCACHED_MAPPING 198 199config CPU_SH3 200 bool 201 select CPU_HAS_INTEVT 202 select CPU_HAS_SR_RB 203 select SYS_SUPPORTS_TMU 204 205config CPU_SH4 206 bool 207 select CPU_HAS_INTEVT 208 select CPU_HAS_SR_RB 209 select CPU_HAS_FPU if !CPU_SH4AL_DSP 210 select SYS_SUPPORTS_TMU 211 select SYS_SUPPORTS_HUGETLBFS if MMU 212 213config CPU_SH4A 214 bool 215 select CPU_SH4 216 217config CPU_SH4AL_DSP 218 bool 219 select CPU_SH4A 220 select CPU_HAS_DSP 221 222config CPU_SH5 223 bool 224 select CPU_HAS_FPU 225 select SYS_SUPPORTS_TMU 226 select SYS_SUPPORTS_HUGETLBFS if MMU 227 228config CPU_SHX2 229 bool 230 231config CPU_SHX3 232 bool 233 select DMA_COHERENT 234 select SYS_SUPPORTS_SMP 235 select SYS_SUPPORTS_NUMA 236 237config ARCH_SHMOBILE 238 bool 239 select ARCH_SUSPEND_POSSIBLE 240 select PM 241 select PM_RUNTIME 242 243config CPU_HAS_PMU 244 depends on CPU_SH4 || CPU_SH4A 245 default y 246 bool 247 248if SUPERH32 249 250choice 251 prompt "Processor sub-type selection" 252 253# 254# Processor subtypes 255# 256 257# SH-2 Processor Support 258 259config CPU_SUBTYPE_SH7619 260 bool "Support SH7619 processor" 261 select CPU_SH2 262 select SYS_SUPPORTS_CMT 263 264# SH-2A Processor Support 265 266config CPU_SUBTYPE_SH7201 267 bool "Support SH7201 processor" 268 select CPU_SH2A 269 select CPU_HAS_FPU 270 select SYS_SUPPORTS_MTU2 271 272config 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 select ARCH_WANT_OPTIONAL_GPIOLIB 279 280config CPU_SUBTYPE_SH7206 281 bool "Support SH7206 processor" 282 select CPU_SH2A 283 select SYS_SUPPORTS_CMT 284 select SYS_SUPPORTS_MTU2 285 286config CPU_SUBTYPE_SH7263 287 bool "Support SH7263 processor" 288 select CPU_SH2A 289 select CPU_HAS_FPU 290 select SYS_SUPPORTS_CMT 291 select SYS_SUPPORTS_MTU2 292 293config CPU_SUBTYPE_SH7264 294 bool "Support SH7264 processor" 295 select CPU_SH2A 296 select CPU_HAS_FPU 297 select SYS_SUPPORTS_CMT 298 select SYS_SUPPORTS_MTU2 299 300config CPU_SUBTYPE_SH7269 301 bool "Support SH7269 processor" 302 select CPU_SH2A 303 select CPU_HAS_FPU 304 select SYS_SUPPORTS_CMT 305 select SYS_SUPPORTS_MTU2 306 307config CPU_SUBTYPE_MXG 308 bool "Support MX-G processor" 309 select CPU_SH2A 310 select SYS_SUPPORTS_MTU2 311 help 312 Select MX-G if running on an R8A03022BG part. 313 314# SH-3 Processor Support 315 316config CPU_SUBTYPE_SH7705 317 bool "Support SH7705 processor" 318 select CPU_SH3 319 320config 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 326config 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 332config 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 339config 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 345config 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 352config 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 359config CPU_SUBTYPE_SH7720 360 bool "Support SH7720 processor" 361 select CPU_SH3 362 select CPU_HAS_DSP 363 select SYS_SUPPORTS_CMT 364 select ARCH_WANT_OPTIONAL_GPIOLIB 365 select USB_ARCH_HAS_OHCI 366 select USB_OHCI_SH if USB_OHCI_HCD 367 help 368 Select SH7720 if you have a SH3-DSP SH7720 CPU. 369 370config CPU_SUBTYPE_SH7721 371 bool "Support SH7721 processor" 372 select CPU_SH3 373 select CPU_HAS_DSP 374 select SYS_SUPPORTS_CMT 375 select USB_ARCH_HAS_OHCI 376 select USB_OHCI_SH if USB_OHCI_HCD 377 help 378 Select SH7721 if you have a SH3-DSP SH7721 CPU. 379 380# SH-4 Processor Support 381 382config CPU_SUBTYPE_SH7750 383 bool "Support SH7750 processor" 384 select CPU_SH4 385 help 386 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 387 388config CPU_SUBTYPE_SH7091 389 bool "Support SH7091 processor" 390 select CPU_SH4 391 help 392 Select SH7091 if you have an SH-4 based Sega device (such as 393 the Dreamcast, Naomi, and Naomi 2). 394 395config CPU_SUBTYPE_SH7750R 396 bool "Support SH7750R processor" 397 select CPU_SH4 398 399config CPU_SUBTYPE_SH7750S 400 bool "Support SH7750S processor" 401 select CPU_SH4 402 403config CPU_SUBTYPE_SH7751 404 bool "Support SH7751 processor" 405 select CPU_SH4 406 help 407 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 408 or if you have a HD6417751R CPU. 409 410config CPU_SUBTYPE_SH7751R 411 bool "Support SH7751R processor" 412 select CPU_SH4 413 414config CPU_SUBTYPE_SH7760 415 bool "Support SH7760 processor" 416 select CPU_SH4 417 418config CPU_SUBTYPE_SH4_202 419 bool "Support SH4-202 processor" 420 select CPU_SH4 421 422# SH-4A Processor Support 423 424config CPU_SUBTYPE_SH7723 425 bool "Support SH7723 processor" 426 select CPU_SH4A 427 select CPU_SHX2 428 select ARCH_SHMOBILE 429 select ARCH_SPARSEMEM_ENABLE 430 select SYS_SUPPORTS_CMT 431 select ARCH_WANT_OPTIONAL_GPIOLIB 432 help 433 Select SH7723 if you have an SH-MobileR2 CPU. 434 435config CPU_SUBTYPE_SH7724 436 bool "Support SH7724 processor" 437 select CPU_SH4A 438 select CPU_SHX2 439 select ARCH_SHMOBILE 440 select ARCH_SPARSEMEM_ENABLE 441 select SYS_SUPPORTS_CMT 442 select ARCH_WANT_OPTIONAL_GPIOLIB 443 help 444 Select SH7724 if you have an SH-MobileR2R CPU. 445 446config CPU_SUBTYPE_SH7734 447 bool "Support SH7734 processor" 448 select CPU_SH4A 449 select CPU_SHX2 450 select ARCH_WANT_OPTIONAL_GPIOLIB 451 select USB_ARCH_HAS_OHCI 452 select USB_ARCH_HAS_EHCI 453 help 454 Select SH7734 if you have a SH4A SH7734 CPU. 455 456config CPU_SUBTYPE_SH7757 457 bool "Support SH7757 processor" 458 select CPU_SH4A 459 select CPU_SHX2 460 select ARCH_WANT_OPTIONAL_GPIOLIB 461 select USB_ARCH_HAS_OHCI 462 select USB_ARCH_HAS_EHCI 463 help 464 Select SH7757 if you have a SH4A SH7757 CPU. 465 466config CPU_SUBTYPE_SH7763 467 bool "Support SH7763 processor" 468 select CPU_SH4A 469 select USB_ARCH_HAS_OHCI 470 select USB_OHCI_SH if USB_OHCI_HCD 471 help 472 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 473 474config CPU_SUBTYPE_SH7770 475 bool "Support SH7770 processor" 476 select CPU_SH4A 477 478config CPU_SUBTYPE_SH7780 479 bool "Support SH7780 processor" 480 select CPU_SH4A 481 482config CPU_SUBTYPE_SH7785 483 bool "Support SH7785 processor" 484 select CPU_SH4A 485 select CPU_SHX2 486 select ARCH_SPARSEMEM_ENABLE 487 select SYS_SUPPORTS_NUMA 488 select ARCH_WANT_OPTIONAL_GPIOLIB 489 490config CPU_SUBTYPE_SH7786 491 bool "Support SH7786 processor" 492 select CPU_SH4A 493 select CPU_SHX3 494 select CPU_HAS_PTEAEX 495 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 496 select ARCH_WANT_OPTIONAL_GPIOLIB 497 select USB_ARCH_HAS_OHCI 498 select USB_OHCI_SH if USB_OHCI_HCD 499 select USB_ARCH_HAS_EHCI 500 select USB_EHCI_SH if USB_EHCI_HCD 501 502config CPU_SUBTYPE_SHX3 503 bool "Support SH-X3 processor" 504 select CPU_SH4A 505 select CPU_SHX3 506 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 507 select ARCH_REQUIRE_GPIOLIB 508 509# SH4AL-DSP Processor Support 510 511config CPU_SUBTYPE_SH7343 512 bool "Support SH7343 processor" 513 select CPU_SH4AL_DSP 514 select ARCH_SHMOBILE 515 select SYS_SUPPORTS_CMT 516 517config CPU_SUBTYPE_SH7722 518 bool "Support SH7722 processor" 519 select CPU_SH4AL_DSP 520 select CPU_SHX2 521 select ARCH_SHMOBILE 522 select ARCH_SPARSEMEM_ENABLE 523 select SYS_SUPPORTS_NUMA 524 select SYS_SUPPORTS_CMT 525 select ARCH_WANT_OPTIONAL_GPIOLIB 526 527config CPU_SUBTYPE_SH7366 528 bool "Support SH7366 processor" 529 select CPU_SH4AL_DSP 530 select CPU_SHX2 531 select ARCH_SHMOBILE 532 select ARCH_SPARSEMEM_ENABLE 533 select SYS_SUPPORTS_NUMA 534 select SYS_SUPPORTS_CMT 535 536endchoice 537 538endif 539 540if SUPERH64 541 542choice 543 prompt "Processor sub-type selection" 544 545# SH-5 Processor Support 546 547config CPU_SUBTYPE_SH5_101 548 bool "Support SH5-101 processor" 549 select CPU_SH5 550 551config CPU_SUBTYPE_SH5_103 552 bool "Support SH5-103 processor" 553 select CPU_SH5 554 555endchoice 556 557endif 558 559source "arch/sh/mm/Kconfig" 560 561source "arch/sh/Kconfig.cpu" 562 563source "arch/sh/boards/Kconfig" 564 565menu "Timer and clock configuration" 566 567config SH_TIMER_TMU 568 bool "TMU timer driver" 569 depends on SYS_SUPPORTS_TMU 570 default y 571 help 572 This enables the build of the TMU timer driver. 573 574config SH_TIMER_CMT 575 bool "CMT timer driver" 576 depends on SYS_SUPPORTS_CMT 577 default y 578 help 579 This enables build of the CMT timer driver. 580 581config SH_TIMER_MTU2 582 bool "MTU2 timer driver" 583 depends on SYS_SUPPORTS_MTU2 584 default y 585 help 586 This enables build of the MTU2 timer driver. 587 588config SH_PCLK_FREQ 589 int "Peripheral clock frequency (in Hz)" 590 depends on SH_CLK_CPG_LEGACY 591 default "31250000" if CPU_SUBTYPE_SH7619 592 default "33333333" if CPU_SUBTYPE_SH7770 || \ 593 CPU_SUBTYPE_SH7760 || \ 594 CPU_SUBTYPE_SH7705 || \ 595 CPU_SUBTYPE_SH7203 || \ 596 CPU_SUBTYPE_SH7206 || \ 597 CPU_SUBTYPE_SH7263 || \ 598 CPU_SUBTYPE_MXG 599 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 600 default "66000000" if CPU_SUBTYPE_SH4_202 601 default "50000000" 602 help 603 This option is used to specify the peripheral clock frequency. 604 This is necessary for determining the reference clock value on 605 platforms lacking an RTC. 606 607config SH_CLK_CPG 608 def_bool y 609 610config SH_CLK_CPG_LEGACY 611 depends on SH_CLK_CPG 612 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 613 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 614 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 615 !CPU_SUBTYPE_SH7269 616 617endmenu 618 619menu "CPU Frequency scaling" 620 621source "drivers/cpufreq/Kconfig" 622 623config SH_CPU_FREQ 624 tristate "SuperH CPU Frequency driver" 625 depends on CPU_FREQ 626 select CPU_FREQ_TABLE 627 help 628 This adds the cpufreq driver for SuperH. Any CPU that supports 629 clock rate rounding through the clock framework can use this 630 driver. While it will make the kernel slightly larger, this is 631 harmless for CPUs that don't support rate rounding. The driver 632 will also generate a notice in the boot log before disabling 633 itself if the CPU in question is not capable of rate rounding. 634 635 For details, take a look at <file:Documentation/cpu-freq>. 636 637 If unsure, say N. 638 639endmenu 640 641source "arch/sh/drivers/Kconfig" 642 643endmenu 644 645menu "Kernel features" 646 647source kernel/Kconfig.hz 648 649config KEXEC 650 bool "kexec system call (EXPERIMENTAL)" 651 depends on SUPERH32 && EXPERIMENTAL && MMU 652 help 653 kexec is a system call that implements the ability to shutdown your 654 current kernel, and to start another kernel. It is like a reboot 655 but it is independent of the system firmware. And like a reboot 656 you can start any kernel with it, not just Linux. 657 658 The name comes from the similarity to the exec system call. 659 660 It is an ongoing process to be certain the hardware in a machine 661 is properly shutdown, so do not be surprised if this code does not 662 initially work for you. It may help to enable device hotplugging 663 support. As of this writing the exact hardware interface is 664 strongly in flux, so no good recommendation can be made. 665 666config CRASH_DUMP 667 bool "kernel crash dumps (EXPERIMENTAL)" 668 depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP 669 help 670 Generate crash dump after being started by kexec. 671 This should be normally only set in special crash dump kernels 672 which are loaded in the main kernel with kexec-tools into 673 a specially reserved region and then later executed after 674 a crash by kdump/kexec. The crash dump kernel must be compiled 675 to a memory address not used by the main kernel using 676 PHYSICAL_START. 677 678 For more details see Documentation/kdump/kdump.txt 679 680config KEXEC_JUMP 681 bool "kexec jump (EXPERIMENTAL)" 682 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL 683 help 684 Jump between original kernel and kexeced kernel and invoke 685 code via KEXEC 686 687config PHYSICAL_START 688 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 689 default MEMORY_START 690 ---help--- 691 This gives the physical address where the kernel is loaded 692 and is ordinarily the same as MEMORY_START. 693 694 Different values are primarily used in the case of kexec on panic 695 where the fail safe kernel needs to run at a different address 696 than the panic-ed kernel. 697 698config SECCOMP 699 bool "Enable seccomp to safely compute untrusted bytecode" 700 depends on PROC_FS 701 help 702 This kernel feature is useful for number crunching applications 703 that may need to compute untrusted bytecode during their 704 execution. By using pipes or other transports made available to 705 the process as file descriptors supporting the read/write 706 syscalls, it's possible to isolate those applications in 707 their own address space using seccomp. Once seccomp is 708 enabled via prctl, it cannot be disabled and the task is only 709 allowed to execute a few safe syscalls defined by each seccomp 710 mode. 711 712 If unsure, say N. 713 714config CC_STACKPROTECTOR 715 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 716 depends on SUPERH32 && EXPERIMENTAL 717 help 718 This option turns on the -fstack-protector GCC feature. This 719 feature puts, at the beginning of functions, a canary value on 720 the stack just before the return address, and validates 721 the value just before actually returning. Stack based buffer 722 overflows (that need to overwrite this return address) now also 723 overwrite the canary, which gets detected and the attack is then 724 neutralized via a kernel panic. 725 726 This feature requires gcc version 4.2 or above. 727 728config SMP 729 bool "Symmetric multi-processing support" 730 depends on SYS_SUPPORTS_SMP 731 select USE_GENERIC_SMP_HELPERS 732 ---help--- 733 This enables support for systems with more than one CPU. If you have 734 a system with only one CPU, like most personal computers, say N. If 735 you have a system with more than one CPU, say Y. 736 737 If you say N here, the kernel will run on single and multiprocessor 738 machines, but will use only one CPU of a multiprocessor machine. If 739 you say Y here, the kernel will run on many, but not all, 740 singleprocessor machines. On a singleprocessor machine, the kernel 741 will run faster if you say N here. 742 743 People using multiprocessor machines who say Y here should also say 744 Y to "Enhanced Real Time Clock Support", below. 745 746 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 747 available at <http://www.tldp.org/docs.html#howto>. 748 749 If you don't know what to do here, say N. 750 751config NR_CPUS 752 int "Maximum number of CPUs (2-32)" 753 range 2 32 754 depends on SMP 755 default "4" if CPU_SUBTYPE_SHX3 756 default "2" 757 help 758 This allows you to specify the maximum number of CPUs which this 759 kernel will support. The maximum supported value is 32 and the 760 minimum value which makes sense is 2. 761 762 This is purely to save memory - each supported CPU adds 763 approximately eight kilobytes to the kernel image. 764 765config HOTPLUG_CPU 766 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 767 depends on SMP && HOTPLUG && EXPERIMENTAL 768 help 769 Say Y here to experiment with turning CPUs off and on. CPUs 770 can be controlled through /sys/devices/system/cpu. 771 772source "kernel/Kconfig.preempt" 773 774config GUSA 775 def_bool y 776 depends on !SMP && SUPERH32 777 help 778 This enables support for gUSA (general UserSpace Atomicity). 779 This is the default implementation for both UP and non-ll/sc 780 CPUs, and is used by the libc, amongst others. 781 782 For additional information, design information can be found 783 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 784 785 This should only be disabled for special cases where alternate 786 atomicity implementations exist. 787 788config GUSA_RB 789 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 790 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 791 help 792 Enabling this option will allow the kernel to implement some 793 atomic operations using a software implementation of load-locked/ 794 store-conditional (LLSC). On machines which do not have hardware 795 LLSC, this should be more efficient than the other alternative of 796 disabling interrupts around the atomic sequence. 797 798config HW_PERF_EVENTS 799 bool "Enable hardware performance counter support for perf events" 800 depends on PERF_EVENTS && CPU_HAS_PMU 801 default y 802 help 803 Enable hardware performance counter support for perf events. If 804 disabled, perf events will use software events only. 805 806source "drivers/sh/Kconfig" 807 808endmenu 809 810menu "Boot options" 811 812config ZERO_PAGE_OFFSET 813 hex 814 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 815 SH_7751_SOLUTION_ENGINE 816 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 817 default "0x00002000" if PAGE_SIZE_8KB 818 default "0x00001000" 819 help 820 This sets the default offset of zero page. 821 822config BOOT_LINK_OFFSET 823 hex 824 default "0x00210000" if SH_SHMIN 825 default "0x00400000" if SH_CAYMAN 826 default "0x00810000" if SH_7780_SOLUTION_ENGINE 827 default "0x009e0000" if SH_TITAN 828 default "0x01800000" if SH_SDK7780 829 default "0x02000000" if SH_EDOSK7760 830 default "0x00800000" 831 help 832 This option allows you to set the link address offset of the zImage. 833 This can be useful if you are on a board which has a small amount of 834 memory. 835 836config ENTRY_OFFSET 837 hex 838 default "0x00001000" if PAGE_SIZE_4KB 839 default "0x00002000" if PAGE_SIZE_8KB 840 default "0x00004000" if PAGE_SIZE_16KB 841 default "0x00010000" if PAGE_SIZE_64KB 842 default "0x00000000" 843 844config ROMIMAGE_MMCIF 845 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 846 depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL 847 help 848 Say Y here to include experimental MMCIF loading code in 849 romImage. With this enabled it is possible to write the romImage 850 kernel image to an MMC card and boot the kernel straight from 851 the reset vector. At reset the processor Mask ROM will load the 852 first part of the romImage which in turn loads the rest the kernel 853 image to RAM using the MMCIF hardware block. 854 855choice 856 prompt "Kernel command line" 857 optional 858 default CMDLINE_OVERWRITE 859 help 860 Setting this option allows the kernel command line arguments 861 to be set. 862 863config CMDLINE_OVERWRITE 864 bool "Overwrite bootloader kernel arguments" 865 help 866 Given string will overwrite any arguments passed in by 867 a bootloader. 868 869config CMDLINE_EXTEND 870 bool "Extend bootloader kernel arguments" 871 help 872 Given string will be concatenated with arguments passed in 873 by a bootloader. 874 875endchoice 876 877config CMDLINE 878 string "Kernel command line arguments string" 879 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 880 default "console=ttySC1,115200" 881 882endmenu 883 884menu "Bus options" 885 886config SUPERHYWAY 887 tristate "SuperHyway Bus support" 888 depends on CPU_SUBTYPE_SH4_202 889 890config MAPLE 891 bool "Maple Bus support" 892 depends on SH_DREAMCAST 893 help 894 The Maple Bus is SEGA's serial communication bus for peripherals 895 on the Dreamcast. Without this bus support you won't be able to 896 get your Dreamcast keyboard etc to work, so most users 897 probably want to say 'Y' here, unless you are only using the 898 Dreamcast with a serial line terminal or a remote network 899 connection. 900 901config PCI 902 bool "PCI support" 903 depends on SYS_SUPPORTS_PCI 904 select PCI_DOMAINS 905 select GENERIC_PCI_IOMAP 906 select NO_GENERIC_PCI_IOPORT_MAP 907 help 908 Find out whether you have a PCI motherboard. PCI is the name of a 909 bus system, i.e. the way the CPU talks to the other stuff inside 910 your box. If you have PCI, say Y, otherwise N. 911 912config PCI_DOMAINS 913 bool 914 915source "drivers/pci/pcie/Kconfig" 916 917source "drivers/pci/Kconfig" 918 919source "drivers/pcmcia/Kconfig" 920 921source "drivers/pci/hotplug/Kconfig" 922 923endmenu 924 925menu "Executable file formats" 926 927source "fs/Kconfig.binfmt" 928 929endmenu 930 931menu "Power management options (EXPERIMENTAL)" 932depends on EXPERIMENTAL 933 934source "kernel/power/Kconfig" 935 936source "drivers/cpuidle/Kconfig" 937 938endmenu 939 940source "net/Kconfig" 941 942source "drivers/Kconfig" 943 944source "fs/Kconfig" 945 946source "arch/sh/Kconfig.debug" 947 948source "security/Kconfig" 949 950source "crypto/Kconfig" 951 952source "lib/Kconfig" 953