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 ARCH_HAVE_CUSTOM_GPIO_H 17 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 18 select PERF_USE_VMALLOC 19 select HAVE_KERNEL_GZIP 20 select HAVE_KERNEL_BZIP2 21 select HAVE_KERNEL_LZMA 22 select HAVE_KERNEL_XZ 23 select HAVE_KERNEL_LZO 24 select ARCH_WANT_IPC_PARSE_VERSION 25 select HAVE_SYSCALL_TRACEPOINTS 26 select HAVE_REGS_AND_STACK_ACCESS_API 27 select HAVE_GENERIC_HARDIRQS 28 select MAY_HAVE_SPARSE_IRQ 29 select IRQ_FORCED_THREADING 30 select RTC_LIB 31 select GENERIC_ATOMIC64 32 select GENERIC_IRQ_SHOW 33 select GENERIC_SMP_IDLE_THREAD 34 select GENERIC_CLOCKEVENTS 35 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 36 select GENERIC_STRNCPY_FROM_USER 37 select GENERIC_STRNLEN_USER 38 help 39 The SuperH is a RISC processor targeted for use in embedded systems 40 and consumer electronics; it was also used in the Sega Dreamcast 41 gaming console. The SuperH port has a home page at 42 <http://www.linux-sh.org/>. 43 44config SUPERH32 45 def_bool ARCH = "sh" 46 select HAVE_KPROBES 47 select HAVE_KRETPROBES 48 select HAVE_IOREMAP_PROT if MMU && !X2TLB 49 select HAVE_FUNCTION_TRACER 50 select HAVE_FTRACE_MCOUNT_RECORD 51 select HAVE_DYNAMIC_FTRACE 52 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 53 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 54 select ARCH_WANT_IPC_PARSE_VERSION 55 select HAVE_FUNCTION_GRAPH_TRACER 56 select HAVE_ARCH_KGDB 57 select HAVE_HW_BREAKPOINT 58 select HAVE_MIXED_BREAKPOINTS_REGS 59 select PERF_EVENTS 60 select ARCH_HIBERNATION_POSSIBLE if MMU 61 select SPARSE_IRQ 62 63config SUPERH64 64 def_bool ARCH = "sh64" 65 select KALLSYMS 66 67config ARCH_DEFCONFIG 68 string 69 default "arch/sh/configs/shx3_defconfig" if SUPERH32 70 default "arch/sh/configs/cayman_defconfig" if SUPERH64 71 72config RWSEM_GENERIC_SPINLOCK 73 def_bool y 74 75config RWSEM_XCHGADD_ALGORITHM 76 bool 77 78config GENERIC_BUG 79 def_bool y 80 depends on BUG && SUPERH32 81 82config GENERIC_CSUM 83 def_bool y 84 depends on SUPERH64 85 86config GENERIC_HWEIGHT 87 def_bool y 88 89config IRQ_PER_CPU 90 def_bool y 91 92config GENERIC_GPIO 93 def_bool n 94 95config GENERIC_CALIBRATE_DELAY 96 bool 97 98config GENERIC_LOCKBREAK 99 def_bool y 100 depends on SMP && PREEMPT 101 102config ARCH_SUSPEND_POSSIBLE 103 def_bool n 104 105config ARCH_HIBERNATION_POSSIBLE 106 def_bool n 107 108config SYS_SUPPORTS_APM_EMULATION 109 bool 110 select ARCH_SUSPEND_POSSIBLE 111 112config SYS_SUPPORTS_HUGETLBFS 113 bool 114 115config SYS_SUPPORTS_SMP 116 bool 117 118config SYS_SUPPORTS_NUMA 119 bool 120 121config SYS_SUPPORTS_PCI 122 bool 123 124config SYS_SUPPORTS_CMT 125 bool 126 127config SYS_SUPPORTS_MTU2 128 bool 129 130config SYS_SUPPORTS_TMU 131 bool 132 133config STACKTRACE_SUPPORT 134 def_bool y 135 136config LOCKDEP_SUPPORT 137 def_bool y 138 139config HAVE_LATENCYTOP_SUPPORT 140 def_bool y 141 142config ARCH_HAS_ILOG2_U32 143 def_bool n 144 145config ARCH_HAS_ILOG2_U64 146 def_bool n 147 148config ARCH_NO_VIRT_TO_BUS 149 def_bool y 150 151config ARCH_HAS_DEFAULT_IDLE 152 def_bool y 153 154config NO_IOPORT 155 def_bool !PCI 156 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 157 !SH_HP6XX && !SH_SOLUTION_ENGINE 158 159config IO_TRAPPED 160 bool 161 162config SWAP_IO_SPACE 163 bool 164 165config DMA_COHERENT 166 bool 167 168config DMA_NONCOHERENT 169 def_bool !DMA_COHERENT 170 171config NEED_DMA_MAP_STATE 172 def_bool DMA_NONCOHERENT 173 174config NEED_SG_DMA_LENGTH 175 def_bool y 176 177source "init/Kconfig" 178 179source "kernel/Kconfig.freezer" 180 181menu "System type" 182 183# 184# Processor families 185# 186config CPU_SH2 187 bool 188 189config CPU_SH2A 190 bool 191 select CPU_SH2 192 select UNCACHED_MAPPING 193 194config CPU_SH3 195 bool 196 select CPU_HAS_INTEVT 197 select CPU_HAS_SR_RB 198 select SYS_SUPPORTS_TMU 199 200config CPU_SH4 201 bool 202 select CPU_HAS_INTEVT 203 select CPU_HAS_SR_RB 204 select CPU_HAS_FPU if !CPU_SH4AL_DSP 205 select SYS_SUPPORTS_TMU 206 select SYS_SUPPORTS_HUGETLBFS if MMU 207 208config CPU_SH4A 209 bool 210 select CPU_SH4 211 212config CPU_SH4AL_DSP 213 bool 214 select CPU_SH4A 215 select CPU_HAS_DSP 216 217config CPU_SH5 218 bool 219 select CPU_HAS_FPU 220 select SYS_SUPPORTS_TMU 221 select SYS_SUPPORTS_HUGETLBFS if MMU 222 223config CPU_SHX2 224 bool 225 226config CPU_SHX3 227 bool 228 select DMA_COHERENT 229 select SYS_SUPPORTS_SMP 230 select SYS_SUPPORTS_NUMA 231 232config ARCH_SHMOBILE 233 bool 234 select ARCH_SUSPEND_POSSIBLE 235 select PM 236 select PM_RUNTIME 237 238config CPU_HAS_PMU 239 depends on CPU_SH4 || CPU_SH4A 240 default y 241 bool 242 243if SUPERH32 244 245choice 246 prompt "Processor sub-type selection" 247 248# 249# Processor subtypes 250# 251 252# SH-2 Processor Support 253 254config CPU_SUBTYPE_SH7619 255 bool "Support SH7619 processor" 256 select CPU_SH2 257 select SYS_SUPPORTS_CMT 258 259# SH-2A Processor Support 260 261config CPU_SUBTYPE_SH7201 262 bool "Support SH7201 processor" 263 select CPU_SH2A 264 select CPU_HAS_FPU 265 select SYS_SUPPORTS_MTU2 266 267config CPU_SUBTYPE_SH7203 268 bool "Support SH7203 processor" 269 select CPU_SH2A 270 select CPU_HAS_FPU 271 select SYS_SUPPORTS_CMT 272 select SYS_SUPPORTS_MTU2 273 select ARCH_WANT_OPTIONAL_GPIOLIB 274 275config CPU_SUBTYPE_SH7206 276 bool "Support SH7206 processor" 277 select CPU_SH2A 278 select SYS_SUPPORTS_CMT 279 select SYS_SUPPORTS_MTU2 280 281config CPU_SUBTYPE_SH7263 282 bool "Support SH7263 processor" 283 select CPU_SH2A 284 select CPU_HAS_FPU 285 select SYS_SUPPORTS_CMT 286 select SYS_SUPPORTS_MTU2 287 288config CPU_SUBTYPE_SH7264 289 bool "Support SH7264 processor" 290 select CPU_SH2A 291 select CPU_HAS_FPU 292 select SYS_SUPPORTS_CMT 293 select SYS_SUPPORTS_MTU2 294 295config CPU_SUBTYPE_SH7269 296 bool "Support SH7269 processor" 297 select CPU_SH2A 298 select CPU_HAS_FPU 299 select SYS_SUPPORTS_CMT 300 select SYS_SUPPORTS_MTU2 301 302config CPU_SUBTYPE_MXG 303 bool "Support MX-G processor" 304 select CPU_SH2A 305 select SYS_SUPPORTS_MTU2 306 help 307 Select MX-G if running on an R8A03022BG part. 308 309# SH-3 Processor Support 310 311config CPU_SUBTYPE_SH7705 312 bool "Support SH7705 processor" 313 select CPU_SH3 314 315config CPU_SUBTYPE_SH7706 316 bool "Support SH7706 processor" 317 select CPU_SH3 318 help 319 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 320 321config CPU_SUBTYPE_SH7707 322 bool "Support SH7707 processor" 323 select CPU_SH3 324 help 325 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 326 327config CPU_SUBTYPE_SH7708 328 bool "Support SH7708 processor" 329 select CPU_SH3 330 help 331 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 332 if you have a 100 Mhz SH-3 HD6417708R CPU. 333 334config CPU_SUBTYPE_SH7709 335 bool "Support SH7709 processor" 336 select CPU_SH3 337 help 338 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 339 340config CPU_SUBTYPE_SH7710 341 bool "Support SH7710 processor" 342 select CPU_SH3 343 select CPU_HAS_DSP 344 help 345 Select SH7710 if you have a SH3-DSP SH7710 CPU. 346 347config CPU_SUBTYPE_SH7712 348 bool "Support SH7712 processor" 349 select CPU_SH3 350 select CPU_HAS_DSP 351 help 352 Select SH7712 if you have a SH3-DSP SH7712 CPU. 353 354config CPU_SUBTYPE_SH7720 355 bool "Support SH7720 processor" 356 select CPU_SH3 357 select CPU_HAS_DSP 358 select SYS_SUPPORTS_CMT 359 select ARCH_WANT_OPTIONAL_GPIOLIB 360 select USB_ARCH_HAS_OHCI 361 select USB_OHCI_SH if USB_OHCI_HCD 362 help 363 Select SH7720 if you have a SH3-DSP SH7720 CPU. 364 365config CPU_SUBTYPE_SH7721 366 bool "Support SH7721 processor" 367 select CPU_SH3 368 select CPU_HAS_DSP 369 select SYS_SUPPORTS_CMT 370 select USB_ARCH_HAS_OHCI 371 select USB_OHCI_SH if USB_OHCI_HCD 372 help 373 Select SH7721 if you have a SH3-DSP SH7721 CPU. 374 375# SH-4 Processor Support 376 377config CPU_SUBTYPE_SH7750 378 bool "Support SH7750 processor" 379 select CPU_SH4 380 help 381 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 382 383config CPU_SUBTYPE_SH7091 384 bool "Support SH7091 processor" 385 select CPU_SH4 386 help 387 Select SH7091 if you have an SH-4 based Sega device (such as 388 the Dreamcast, Naomi, and Naomi 2). 389 390config CPU_SUBTYPE_SH7750R 391 bool "Support SH7750R processor" 392 select CPU_SH4 393 394config CPU_SUBTYPE_SH7750S 395 bool "Support SH7750S processor" 396 select CPU_SH4 397 398config CPU_SUBTYPE_SH7751 399 bool "Support SH7751 processor" 400 select CPU_SH4 401 help 402 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 403 or if you have a HD6417751R CPU. 404 405config CPU_SUBTYPE_SH7751R 406 bool "Support SH7751R processor" 407 select CPU_SH4 408 409config CPU_SUBTYPE_SH7760 410 bool "Support SH7760 processor" 411 select CPU_SH4 412 413config CPU_SUBTYPE_SH4_202 414 bool "Support SH4-202 processor" 415 select CPU_SH4 416 417# SH-4A Processor Support 418 419config CPU_SUBTYPE_SH7723 420 bool "Support SH7723 processor" 421 select CPU_SH4A 422 select CPU_SHX2 423 select ARCH_SHMOBILE 424 select ARCH_SPARSEMEM_ENABLE 425 select SYS_SUPPORTS_CMT 426 select ARCH_WANT_OPTIONAL_GPIOLIB 427 help 428 Select SH7723 if you have an SH-MobileR2 CPU. 429 430config CPU_SUBTYPE_SH7724 431 bool "Support SH7724 processor" 432 select CPU_SH4A 433 select CPU_SHX2 434 select ARCH_SHMOBILE 435 select ARCH_SPARSEMEM_ENABLE 436 select SYS_SUPPORTS_CMT 437 select ARCH_WANT_OPTIONAL_GPIOLIB 438 help 439 Select SH7724 if you have an SH-MobileR2R CPU. 440 441config CPU_SUBTYPE_SH7734 442 bool "Support SH7734 processor" 443 select CPU_SH4A 444 select CPU_SHX2 445 select ARCH_WANT_OPTIONAL_GPIOLIB 446 select USB_ARCH_HAS_OHCI 447 select USB_ARCH_HAS_EHCI 448 help 449 Select SH7734 if you have a SH4A SH7734 CPU. 450 451config CPU_SUBTYPE_SH7757 452 bool "Support SH7757 processor" 453 select CPU_SH4A 454 select CPU_SHX2 455 select ARCH_WANT_OPTIONAL_GPIOLIB 456 select USB_ARCH_HAS_OHCI 457 select USB_ARCH_HAS_EHCI 458 help 459 Select SH7757 if you have a SH4A SH7757 CPU. 460 461config CPU_SUBTYPE_SH7763 462 bool "Support SH7763 processor" 463 select CPU_SH4A 464 select USB_ARCH_HAS_OHCI 465 select USB_OHCI_SH if USB_OHCI_HCD 466 help 467 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 468 469config CPU_SUBTYPE_SH7770 470 bool "Support SH7770 processor" 471 select CPU_SH4A 472 473config CPU_SUBTYPE_SH7780 474 bool "Support SH7780 processor" 475 select CPU_SH4A 476 477config CPU_SUBTYPE_SH7785 478 bool "Support SH7785 processor" 479 select CPU_SH4A 480 select CPU_SHX2 481 select ARCH_SPARSEMEM_ENABLE 482 select SYS_SUPPORTS_NUMA 483 select ARCH_WANT_OPTIONAL_GPIOLIB 484 485config CPU_SUBTYPE_SH7786 486 bool "Support SH7786 processor" 487 select CPU_SH4A 488 select CPU_SHX3 489 select CPU_HAS_PTEAEX 490 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 491 select ARCH_WANT_OPTIONAL_GPIOLIB 492 select USB_ARCH_HAS_OHCI 493 select USB_OHCI_SH if USB_OHCI_HCD 494 select USB_ARCH_HAS_EHCI 495 select USB_EHCI_SH if USB_EHCI_HCD 496 497config CPU_SUBTYPE_SHX3 498 bool "Support SH-X3 processor" 499 select CPU_SH4A 500 select CPU_SHX3 501 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 502 select ARCH_REQUIRE_GPIOLIB 503 504# SH4AL-DSP Processor Support 505 506config CPU_SUBTYPE_SH7343 507 bool "Support SH7343 processor" 508 select CPU_SH4AL_DSP 509 select ARCH_SHMOBILE 510 select SYS_SUPPORTS_CMT 511 512config CPU_SUBTYPE_SH7722 513 bool "Support SH7722 processor" 514 select CPU_SH4AL_DSP 515 select CPU_SHX2 516 select ARCH_SHMOBILE 517 select ARCH_SPARSEMEM_ENABLE 518 select SYS_SUPPORTS_NUMA 519 select SYS_SUPPORTS_CMT 520 select ARCH_WANT_OPTIONAL_GPIOLIB 521 522config CPU_SUBTYPE_SH7366 523 bool "Support SH7366 processor" 524 select CPU_SH4AL_DSP 525 select CPU_SHX2 526 select ARCH_SHMOBILE 527 select ARCH_SPARSEMEM_ENABLE 528 select SYS_SUPPORTS_NUMA 529 select SYS_SUPPORTS_CMT 530 531endchoice 532 533endif 534 535if SUPERH64 536 537choice 538 prompt "Processor sub-type selection" 539 540# SH-5 Processor Support 541 542config CPU_SUBTYPE_SH5_101 543 bool "Support SH5-101 processor" 544 select CPU_SH5 545 546config CPU_SUBTYPE_SH5_103 547 bool "Support SH5-103 processor" 548 select CPU_SH5 549 550endchoice 551 552endif 553 554source "arch/sh/mm/Kconfig" 555 556source "arch/sh/Kconfig.cpu" 557 558source "arch/sh/boards/Kconfig" 559 560menu "Timer and clock configuration" 561 562config SH_TIMER_TMU 563 bool "TMU timer driver" 564 depends on SYS_SUPPORTS_TMU 565 default y 566 help 567 This enables the build of the TMU timer driver. 568 569config SH_TIMER_CMT 570 bool "CMT timer driver" 571 depends on SYS_SUPPORTS_CMT 572 default y 573 help 574 This enables build of the CMT timer driver. 575 576config SH_TIMER_MTU2 577 bool "MTU2 timer driver" 578 depends on SYS_SUPPORTS_MTU2 579 default y 580 help 581 This enables build of the MTU2 timer driver. 582 583config SH_PCLK_FREQ 584 int "Peripheral clock frequency (in Hz)" 585 depends on SH_CLK_CPG_LEGACY 586 default "31250000" if CPU_SUBTYPE_SH7619 587 default "33333333" if CPU_SUBTYPE_SH7770 || \ 588 CPU_SUBTYPE_SH7760 || \ 589 CPU_SUBTYPE_SH7705 || \ 590 CPU_SUBTYPE_SH7203 || \ 591 CPU_SUBTYPE_SH7206 || \ 592 CPU_SUBTYPE_SH7263 || \ 593 CPU_SUBTYPE_MXG 594 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 595 default "66000000" if CPU_SUBTYPE_SH4_202 596 default "50000000" 597 help 598 This option is used to specify the peripheral clock frequency. 599 This is necessary for determining the reference clock value on 600 platforms lacking an RTC. 601 602config SH_CLK_CPG 603 def_bool y 604 605config SH_CLK_CPG_LEGACY 606 depends on SH_CLK_CPG 607 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 608 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 609 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 610 !CPU_SUBTYPE_SH7269 611 612endmenu 613 614menu "CPU Frequency scaling" 615 616source "drivers/cpufreq/Kconfig" 617 618config SH_CPU_FREQ 619 tristate "SuperH CPU Frequency driver" 620 depends on CPU_FREQ 621 select CPU_FREQ_TABLE 622 help 623 This adds the cpufreq driver for SuperH. Any CPU that supports 624 clock rate rounding through the clock framework can use this 625 driver. While it will make the kernel slightly larger, this is 626 harmless for CPUs that don't support rate rounding. The driver 627 will also generate a notice in the boot log before disabling 628 itself if the CPU in question is not capable of rate rounding. 629 630 For details, take a look at <file:Documentation/cpu-freq>. 631 632 If unsure, say N. 633 634endmenu 635 636source "arch/sh/drivers/Kconfig" 637 638endmenu 639 640menu "Kernel features" 641 642source kernel/Kconfig.hz 643 644config KEXEC 645 bool "kexec system call (EXPERIMENTAL)" 646 depends on SUPERH32 && EXPERIMENTAL && MMU 647 help 648 kexec is a system call that implements the ability to shutdown your 649 current kernel, and to start another kernel. It is like a reboot 650 but it is independent of the system firmware. And like a reboot 651 you can start any kernel with it, not just Linux. 652 653 The name comes from the similarity to the exec system call. 654 655 It is an ongoing process to be certain the hardware in a machine 656 is properly shutdown, so do not be surprised if this code does not 657 initially work for you. It may help to enable device hotplugging 658 support. As of this writing the exact hardware interface is 659 strongly in flux, so no good recommendation can be made. 660 661config CRASH_DUMP 662 bool "kernel crash dumps (EXPERIMENTAL)" 663 depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP 664 help 665 Generate crash dump after being started by kexec. 666 This should be normally only set in special crash dump kernels 667 which are loaded in the main kernel with kexec-tools into 668 a specially reserved region and then later executed after 669 a crash by kdump/kexec. The crash dump kernel must be compiled 670 to a memory address not used by the main kernel using 671 PHYSICAL_START. 672 673 For more details see Documentation/kdump/kdump.txt 674 675config KEXEC_JUMP 676 bool "kexec jump (EXPERIMENTAL)" 677 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL 678 help 679 Jump between original kernel and kexeced kernel and invoke 680 code via KEXEC 681 682config PHYSICAL_START 683 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 684 default MEMORY_START 685 ---help--- 686 This gives the physical address where the kernel is loaded 687 and is ordinarily the same as MEMORY_START. 688 689 Different values are primarily used in the case of kexec on panic 690 where the fail safe kernel needs to run at a different address 691 than the panic-ed kernel. 692 693config SECCOMP 694 bool "Enable seccomp to safely compute untrusted bytecode" 695 depends on PROC_FS 696 help 697 This kernel feature is useful for number crunching applications 698 that may need to compute untrusted bytecode during their 699 execution. By using pipes or other transports made available to 700 the process as file descriptors supporting the read/write 701 syscalls, it's possible to isolate those applications in 702 their own address space using seccomp. Once seccomp is 703 enabled via prctl, it cannot be disabled and the task is only 704 allowed to execute a few safe syscalls defined by each seccomp 705 mode. 706 707 If unsure, say N. 708 709config CC_STACKPROTECTOR 710 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 711 depends on SUPERH32 && EXPERIMENTAL 712 help 713 This option turns on the -fstack-protector GCC feature. This 714 feature puts, at the beginning of functions, a canary value on 715 the stack just before the return address, and validates 716 the value just before actually returning. Stack based buffer 717 overflows (that need to overwrite this return address) now also 718 overwrite the canary, which gets detected and the attack is then 719 neutralized via a kernel panic. 720 721 This feature requires gcc version 4.2 or above. 722 723config SMP 724 bool "Symmetric multi-processing support" 725 depends on SYS_SUPPORTS_SMP 726 select USE_GENERIC_SMP_HELPERS 727 ---help--- 728 This enables support for systems with more than one CPU. If you have 729 a system with only one CPU, like most personal computers, say N. If 730 you have a system with more than one CPU, say Y. 731 732 If you say N here, the kernel will run on single and multiprocessor 733 machines, but will use only one CPU of a multiprocessor machine. If 734 you say Y here, the kernel will run on many, but not all, 735 singleprocessor machines. On a singleprocessor machine, the kernel 736 will run faster if you say N here. 737 738 People using multiprocessor machines who say Y here should also say 739 Y to "Enhanced Real Time Clock Support", below. 740 741 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 742 available at <http://www.tldp.org/docs.html#howto>. 743 744 If you don't know what to do here, say N. 745 746config NR_CPUS 747 int "Maximum number of CPUs (2-32)" 748 range 2 32 749 depends on SMP 750 default "4" if CPU_SUBTYPE_SHX3 751 default "2" 752 help 753 This allows you to specify the maximum number of CPUs which this 754 kernel will support. The maximum supported value is 32 and the 755 minimum value which makes sense is 2. 756 757 This is purely to save memory - each supported CPU adds 758 approximately eight kilobytes to the kernel image. 759 760config HOTPLUG_CPU 761 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 762 depends on SMP && HOTPLUG && EXPERIMENTAL 763 help 764 Say Y here to experiment with turning CPUs off and on. CPUs 765 can be controlled through /sys/devices/system/cpu. 766 767source "kernel/Kconfig.preempt" 768 769config GUSA 770 def_bool y 771 depends on !SMP && SUPERH32 772 help 773 This enables support for gUSA (general UserSpace Atomicity). 774 This is the default implementation for both UP and non-ll/sc 775 CPUs, and is used by the libc, amongst others. 776 777 For additional information, design information can be found 778 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 779 780 This should only be disabled for special cases where alternate 781 atomicity implementations exist. 782 783config GUSA_RB 784 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 785 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 786 help 787 Enabling this option will allow the kernel to implement some 788 atomic operations using a software implementation of load-locked/ 789 store-conditional (LLSC). On machines which do not have hardware 790 LLSC, this should be more efficient than the other alternative of 791 disabling interrupts around the atomic sequence. 792 793config HW_PERF_EVENTS 794 bool "Enable hardware performance counter support for perf events" 795 depends on PERF_EVENTS && CPU_HAS_PMU 796 default y 797 help 798 Enable hardware performance counter support for perf events. If 799 disabled, perf events will use software events only. 800 801source "drivers/sh/Kconfig" 802 803endmenu 804 805menu "Boot options" 806 807config ZERO_PAGE_OFFSET 808 hex 809 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 810 SH_7751_SOLUTION_ENGINE 811 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 812 default "0x00002000" if PAGE_SIZE_8KB 813 default "0x00001000" 814 help 815 This sets the default offset of zero page. 816 817config BOOT_LINK_OFFSET 818 hex 819 default "0x00210000" if SH_SHMIN 820 default "0x00400000" if SH_CAYMAN 821 default "0x00810000" if SH_7780_SOLUTION_ENGINE 822 default "0x009e0000" if SH_TITAN 823 default "0x01800000" if SH_SDK7780 824 default "0x02000000" if SH_EDOSK7760 825 default "0x00800000" 826 help 827 This option allows you to set the link address offset of the zImage. 828 This can be useful if you are on a board which has a small amount of 829 memory. 830 831config ENTRY_OFFSET 832 hex 833 default "0x00001000" if PAGE_SIZE_4KB 834 default "0x00002000" if PAGE_SIZE_8KB 835 default "0x00004000" if PAGE_SIZE_16KB 836 default "0x00010000" if PAGE_SIZE_64KB 837 default "0x00000000" 838 839config ROMIMAGE_MMCIF 840 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 841 depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL 842 help 843 Say Y here to include experimental MMCIF loading code in 844 romImage. With this enabled it is possible to write the romImage 845 kernel image to an MMC card and boot the kernel straight from 846 the reset vector. At reset the processor Mask ROM will load the 847 first part of the romImage which in turn loads the rest the kernel 848 image to RAM using the MMCIF hardware block. 849 850choice 851 prompt "Kernel command line" 852 optional 853 default CMDLINE_OVERWRITE 854 help 855 Setting this option allows the kernel command line arguments 856 to be set. 857 858config CMDLINE_OVERWRITE 859 bool "Overwrite bootloader kernel arguments" 860 help 861 Given string will overwrite any arguments passed in by 862 a bootloader. 863 864config CMDLINE_EXTEND 865 bool "Extend bootloader kernel arguments" 866 help 867 Given string will be concatenated with arguments passed in 868 by a bootloader. 869 870endchoice 871 872config CMDLINE 873 string "Kernel command line arguments string" 874 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 875 default "console=ttySC1,115200" 876 877endmenu 878 879menu "Bus options" 880 881config SUPERHYWAY 882 tristate "SuperHyway Bus support" 883 depends on CPU_SUBTYPE_SH4_202 884 885config MAPLE 886 bool "Maple Bus support" 887 depends on SH_DREAMCAST 888 help 889 The Maple Bus is SEGA's serial communication bus for peripherals 890 on the Dreamcast. Without this bus support you won't be able to 891 get your Dreamcast keyboard etc to work, so most users 892 probably want to say 'Y' here, unless you are only using the 893 Dreamcast with a serial line terminal or a remote network 894 connection. 895 896config PCI 897 bool "PCI support" 898 depends on SYS_SUPPORTS_PCI 899 select PCI_DOMAINS 900 select GENERIC_PCI_IOMAP 901 select NO_GENERIC_PCI_IOPORT_MAP 902 help 903 Find out whether you have a PCI motherboard. PCI is the name of a 904 bus system, i.e. the way the CPU talks to the other stuff inside 905 your box. If you have PCI, say Y, otherwise N. 906 907config PCI_DOMAINS 908 bool 909 910source "drivers/pci/pcie/Kconfig" 911 912source "drivers/pci/Kconfig" 913 914source "drivers/pcmcia/Kconfig" 915 916source "drivers/pci/hotplug/Kconfig" 917 918endmenu 919 920menu "Executable file formats" 921 922source "fs/Kconfig.binfmt" 923 924endmenu 925 926menu "Power management options (EXPERIMENTAL)" 927depends on EXPERIMENTAL 928 929source "kernel/power/Kconfig" 930 931source "drivers/cpuidle/Kconfig" 932 933endmenu 934 935source "net/Kconfig" 936 937source "drivers/Kconfig" 938 939source "fs/Kconfig" 940 941source "arch/sh/Kconfig.debug" 942 943source "security/Kconfig" 944 945source "crypto/Kconfig" 946 947source "lib/Kconfig" 948