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_PERF_EVENTS 15 select HAVE_DEBUG_BUGVERBOSE 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_DEBUG_KMEMLEAK 20 select HAVE_KERNEL_GZIP 21 select HAVE_KERNEL_BZIP2 22 select HAVE_KERNEL_LZMA 23 select HAVE_KERNEL_XZ 24 select HAVE_KERNEL_LZO 25 select HAVE_UID16 26 select ARCH_WANT_IPC_PARSE_VERSION 27 select HAVE_SYSCALL_TRACEPOINTS 28 select HAVE_REGS_AND_STACK_ACCESS_API 29 select HAVE_GENERIC_HARDIRQS 30 select MAY_HAVE_SPARSE_IRQ 31 select IRQ_FORCED_THREADING 32 select RTC_LIB 33 select GENERIC_ATOMIC64 34 select GENERIC_IRQ_SHOW 35 select GENERIC_SMP_IDLE_THREAD 36 select GENERIC_IDLE_POLL_SETUP 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 select OLD_SIGSUSPEND 44 select OLD_SIGACTION 45 help 46 The SuperH is a RISC processor targeted for use in embedded systems 47 and consumer electronics; it was also used in the Sega Dreamcast 48 gaming console. The SuperH port has a home page at 49 <http://www.linux-sh.org/>. 50 51config SUPERH32 52 def_bool ARCH = "sh" 53 select HAVE_KPROBES 54 select HAVE_KRETPROBES 55 select HAVE_IOREMAP_PROT if MMU && !X2TLB 56 select HAVE_FUNCTION_TRACER 57 select HAVE_FTRACE_MCOUNT_RECORD 58 select HAVE_DYNAMIC_FTRACE 59 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 60 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 61 select ARCH_WANT_IPC_PARSE_VERSION 62 select HAVE_FUNCTION_GRAPH_TRACER 63 select HAVE_ARCH_KGDB 64 select HAVE_HW_BREAKPOINT 65 select HAVE_MIXED_BREAKPOINTS_REGS 66 select PERF_EVENTS 67 select ARCH_HIBERNATION_POSSIBLE if MMU 68 select SPARSE_IRQ 69 70config SUPERH64 71 def_bool ARCH = "sh64" 72 select KALLSYMS 73 74config ARCH_DEFCONFIG 75 string 76 default "arch/sh/configs/shx3_defconfig" if SUPERH32 77 default "arch/sh/configs/cayman_defconfig" if SUPERH64 78 79config RWSEM_GENERIC_SPINLOCK 80 def_bool y 81 82config RWSEM_XCHGADD_ALGORITHM 83 bool 84 85config GENERIC_BUG 86 def_bool y 87 depends on BUG && SUPERH32 88 89config GENERIC_CSUM 90 def_bool y 91 depends on SUPERH64 92 93config GENERIC_HWEIGHT 94 def_bool y 95 96config GENERIC_CALIBRATE_DELAY 97 bool 98 99config GENERIC_LOCKBREAK 100 def_bool y 101 depends on SMP && PREEMPT 102 103config ARCH_SUSPEND_POSSIBLE 104 def_bool n 105 106config ARCH_HIBERNATION_POSSIBLE 107 def_bool n 108 109config SYS_SUPPORTS_APM_EMULATION 110 bool 111 select ARCH_SUSPEND_POSSIBLE 112 113config SYS_SUPPORTS_HUGETLBFS 114 bool 115 116config SYS_SUPPORTS_SMP 117 bool 118 119config SYS_SUPPORTS_NUMA 120 bool 121 122config SYS_SUPPORTS_PCI 123 bool 124 125config SYS_SUPPORTS_CMT 126 bool 127 128config SYS_SUPPORTS_MTU2 129 bool 130 131config SYS_SUPPORTS_TMU 132 bool 133 134config STACKTRACE_SUPPORT 135 def_bool y 136 137config LOCKDEP_SUPPORT 138 def_bool y 139 140config HAVE_LATENCYTOP_SUPPORT 141 def_bool y 142 143config ARCH_HAS_ILOG2_U32 144 def_bool n 145 146config ARCH_HAS_ILOG2_U64 147 def_bool n 148 149config NO_IOPORT 150 def_bool !PCI 151 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 152 !SH_HP6XX && !SH_SOLUTION_ENGINE 153 154config IO_TRAPPED 155 bool 156 157config SWAP_IO_SPACE 158 bool 159 160config DMA_COHERENT 161 bool 162 163config DMA_NONCOHERENT 164 def_bool !DMA_COHERENT 165 166config NEED_DMA_MAP_STATE 167 def_bool DMA_NONCOHERENT 168 169config NEED_SG_DMA_LENGTH 170 def_bool y 171 172source "init/Kconfig" 173 174source "kernel/Kconfig.freezer" 175 176menu "System type" 177 178# 179# Processor families 180# 181config CPU_SH2 182 bool 183 184config CPU_SH2A 185 bool 186 select CPU_SH2 187 select UNCACHED_MAPPING 188 189config CPU_SH3 190 bool 191 select CPU_HAS_INTEVT 192 select CPU_HAS_SR_RB 193 select SYS_SUPPORTS_TMU 194 195config CPU_SH4 196 bool 197 select CPU_HAS_INTEVT 198 select CPU_HAS_SR_RB 199 select CPU_HAS_FPU if !CPU_SH4AL_DSP 200 select SYS_SUPPORTS_TMU 201 select SYS_SUPPORTS_HUGETLBFS if MMU 202 203config CPU_SH4A 204 bool 205 select CPU_SH4 206 207config CPU_SH4AL_DSP 208 bool 209 select CPU_SH4A 210 select CPU_HAS_DSP 211 212config CPU_SH5 213 bool 214 select CPU_HAS_FPU 215 select SYS_SUPPORTS_TMU 216 select SYS_SUPPORTS_HUGETLBFS if MMU 217 218config CPU_SHX2 219 bool 220 221config CPU_SHX3 222 bool 223 select DMA_COHERENT 224 select SYS_SUPPORTS_SMP 225 select SYS_SUPPORTS_NUMA 226 227config ARCH_SHMOBILE 228 bool 229 select ARCH_SUSPEND_POSSIBLE 230 select PM 231 select PM_RUNTIME 232 233config CPU_HAS_PMU 234 depends on CPU_SH4 || CPU_SH4A 235 default y 236 bool 237 238if SUPERH32 239 240choice 241 prompt "Processor sub-type selection" 242 243# 244# Processor subtypes 245# 246 247# SH-2 Processor Support 248 249config CPU_SUBTYPE_SH7619 250 bool "Support SH7619 processor" 251 select CPU_SH2 252 select SYS_SUPPORTS_CMT 253 254# SH-2A Processor Support 255 256config CPU_SUBTYPE_SH7201 257 bool "Support SH7201 processor" 258 select CPU_SH2A 259 select CPU_HAS_FPU 260 select SYS_SUPPORTS_MTU2 261 262config CPU_SUBTYPE_SH7203 263 bool "Support SH7203 processor" 264 select CPU_SH2A 265 select CPU_HAS_FPU 266 select SYS_SUPPORTS_CMT 267 select SYS_SUPPORTS_MTU2 268 select ARCH_WANT_OPTIONAL_GPIOLIB 269 select PINCTRL 270 271config CPU_SUBTYPE_SH7206 272 bool "Support SH7206 processor" 273 select CPU_SH2A 274 select SYS_SUPPORTS_CMT 275 select SYS_SUPPORTS_MTU2 276 277config CPU_SUBTYPE_SH7263 278 bool "Support SH7263 processor" 279 select CPU_SH2A 280 select CPU_HAS_FPU 281 select SYS_SUPPORTS_CMT 282 select SYS_SUPPORTS_MTU2 283 284config CPU_SUBTYPE_SH7264 285 bool "Support SH7264 processor" 286 select CPU_SH2A 287 select CPU_HAS_FPU 288 select SYS_SUPPORTS_CMT 289 select SYS_SUPPORTS_MTU2 290 select PINCTRL 291 292config CPU_SUBTYPE_SH7269 293 bool "Support SH7269 processor" 294 select CPU_SH2A 295 select CPU_HAS_FPU 296 select SYS_SUPPORTS_CMT 297 select SYS_SUPPORTS_MTU2 298 select PINCTRL 299 300config CPU_SUBTYPE_MXG 301 bool "Support MX-G processor" 302 select CPU_SH2A 303 select SYS_SUPPORTS_MTU2 304 help 305 Select MX-G if running on an R8A03022BG part. 306 307# SH-3 Processor Support 308 309config CPU_SUBTYPE_SH7705 310 bool "Support SH7705 processor" 311 select CPU_SH3 312 313config CPU_SUBTYPE_SH7706 314 bool "Support SH7706 processor" 315 select CPU_SH3 316 help 317 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 318 319config CPU_SUBTYPE_SH7707 320 bool "Support SH7707 processor" 321 select CPU_SH3 322 help 323 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 324 325config CPU_SUBTYPE_SH7708 326 bool "Support SH7708 processor" 327 select CPU_SH3 328 help 329 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 330 if you have a 100 Mhz SH-3 HD6417708R CPU. 331 332config CPU_SUBTYPE_SH7709 333 bool "Support SH7709 processor" 334 select CPU_SH3 335 help 336 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 337 338config CPU_SUBTYPE_SH7710 339 bool "Support SH7710 processor" 340 select CPU_SH3 341 select CPU_HAS_DSP 342 help 343 Select SH7710 if you have a SH3-DSP SH7710 CPU. 344 345config CPU_SUBTYPE_SH7712 346 bool "Support SH7712 processor" 347 select CPU_SH3 348 select CPU_HAS_DSP 349 help 350 Select SH7712 if you have a SH3-DSP SH7712 CPU. 351 352config CPU_SUBTYPE_SH7720 353 bool "Support SH7720 processor" 354 select CPU_SH3 355 select CPU_HAS_DSP 356 select SYS_SUPPORTS_CMT 357 select ARCH_WANT_OPTIONAL_GPIOLIB 358 select USB_ARCH_HAS_OHCI 359 select USB_OHCI_SH if USB_OHCI_HCD 360 select PINCTRL 361 help 362 Select SH7720 if you have a SH3-DSP SH7720 CPU. 363 364config CPU_SUBTYPE_SH7721 365 bool "Support SH7721 processor" 366 select CPU_SH3 367 select CPU_HAS_DSP 368 select SYS_SUPPORTS_CMT 369 select USB_ARCH_HAS_OHCI 370 select USB_OHCI_SH if USB_OHCI_HCD 371 help 372 Select SH7721 if you have a SH3-DSP SH7721 CPU. 373 374# SH-4 Processor Support 375 376config CPU_SUBTYPE_SH7750 377 bool "Support SH7750 processor" 378 select CPU_SH4 379 help 380 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 381 382config CPU_SUBTYPE_SH7091 383 bool "Support SH7091 processor" 384 select CPU_SH4 385 help 386 Select SH7091 if you have an SH-4 based Sega device (such as 387 the Dreamcast, Naomi, and Naomi 2). 388 389config CPU_SUBTYPE_SH7750R 390 bool "Support SH7750R processor" 391 select CPU_SH4 392 393config CPU_SUBTYPE_SH7750S 394 bool "Support SH7750S processor" 395 select CPU_SH4 396 397config CPU_SUBTYPE_SH7751 398 bool "Support SH7751 processor" 399 select CPU_SH4 400 help 401 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 402 or if you have a HD6417751R CPU. 403 404config CPU_SUBTYPE_SH7751R 405 bool "Support SH7751R processor" 406 select CPU_SH4 407 408config CPU_SUBTYPE_SH7760 409 bool "Support SH7760 processor" 410 select CPU_SH4 411 412config CPU_SUBTYPE_SH4_202 413 bool "Support SH4-202 processor" 414 select CPU_SH4 415 416# SH-4A Processor Support 417 418config CPU_SUBTYPE_SH7723 419 bool "Support SH7723 processor" 420 select CPU_SH4A 421 select CPU_SHX2 422 select ARCH_SHMOBILE 423 select ARCH_SPARSEMEM_ENABLE 424 select SYS_SUPPORTS_CMT 425 select ARCH_WANT_OPTIONAL_GPIOLIB 426 select PINCTRL 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 select PINCTRL 439 help 440 Select SH7724 if you have an SH-MobileR2R CPU. 441 442config CPU_SUBTYPE_SH7734 443 bool "Support SH7734 processor" 444 select CPU_SH4A 445 select CPU_SHX2 446 select ARCH_WANT_OPTIONAL_GPIOLIB 447 select USB_ARCH_HAS_OHCI 448 select USB_ARCH_HAS_EHCI 449 select PINCTRL 450 help 451 Select SH7734 if you have a SH4A SH7734 CPU. 452 453config CPU_SUBTYPE_SH7757 454 bool "Support SH7757 processor" 455 select CPU_SH4A 456 select CPU_SHX2 457 select ARCH_WANT_OPTIONAL_GPIOLIB 458 select USB_ARCH_HAS_OHCI 459 select USB_ARCH_HAS_EHCI 460 select PINCTRL 461 help 462 Select SH7757 if you have a SH4A SH7757 CPU. 463 464config CPU_SUBTYPE_SH7763 465 bool "Support SH7763 processor" 466 select CPU_SH4A 467 select USB_ARCH_HAS_OHCI 468 select USB_OHCI_SH if USB_OHCI_HCD 469 help 470 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 471 472config CPU_SUBTYPE_SH7770 473 bool "Support SH7770 processor" 474 select CPU_SH4A 475 476config CPU_SUBTYPE_SH7780 477 bool "Support SH7780 processor" 478 select CPU_SH4A 479 480config CPU_SUBTYPE_SH7785 481 bool "Support SH7785 processor" 482 select CPU_SH4A 483 select CPU_SHX2 484 select ARCH_SPARSEMEM_ENABLE 485 select SYS_SUPPORTS_NUMA 486 select ARCH_WANT_OPTIONAL_GPIOLIB 487 select PINCTRL 488 489config CPU_SUBTYPE_SH7786 490 bool "Support SH7786 processor" 491 select CPU_SH4A 492 select CPU_SHX3 493 select CPU_HAS_PTEAEX 494 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 495 select ARCH_WANT_OPTIONAL_GPIOLIB 496 select USB_ARCH_HAS_OHCI 497 select USB_OHCI_SH if USB_OHCI_HCD 498 select USB_ARCH_HAS_EHCI 499 select USB_EHCI_SH if USB_EHCI_HCD 500 select PINCTRL 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 select PINCTRL 509 510# SH4AL-DSP Processor Support 511 512config CPU_SUBTYPE_SH7343 513 bool "Support SH7343 processor" 514 select CPU_SH4AL_DSP 515 select ARCH_SHMOBILE 516 select SYS_SUPPORTS_CMT 517 518config CPU_SUBTYPE_SH7722 519 bool "Support SH7722 processor" 520 select CPU_SH4AL_DSP 521 select CPU_SHX2 522 select ARCH_SHMOBILE 523 select ARCH_SPARSEMEM_ENABLE 524 select SYS_SUPPORTS_NUMA 525 select SYS_SUPPORTS_CMT 526 select ARCH_WANT_OPTIONAL_GPIOLIB 527 select PINCTRL 528 529config CPU_SUBTYPE_SH7366 530 bool "Support SH7366 processor" 531 select CPU_SH4AL_DSP 532 select CPU_SHX2 533 select ARCH_SHMOBILE 534 select ARCH_SPARSEMEM_ENABLE 535 select SYS_SUPPORTS_NUMA 536 select SYS_SUPPORTS_CMT 537 538endchoice 539 540endif 541 542if SUPERH64 543 544choice 545 prompt "Processor sub-type selection" 546 547# SH-5 Processor Support 548 549config CPU_SUBTYPE_SH5_101 550 bool "Support SH5-101 processor" 551 select CPU_SH5 552 553config CPU_SUBTYPE_SH5_103 554 bool "Support SH5-103 processor" 555 select CPU_SH5 556 557endchoice 558 559endif 560 561source "arch/sh/mm/Kconfig" 562 563source "arch/sh/Kconfig.cpu" 564 565source "arch/sh/boards/Kconfig" 566 567menu "Timer and clock configuration" 568 569config SH_TIMER_TMU 570 bool "TMU timer driver" 571 depends on SYS_SUPPORTS_TMU 572 default y 573 help 574 This enables the build of the TMU timer driver. 575 576config SH_TIMER_CMT 577 bool "CMT timer driver" 578 depends on SYS_SUPPORTS_CMT 579 default y 580 help 581 This enables build of the CMT timer driver. 582 583config SH_TIMER_MTU2 584 bool "MTU2 timer driver" 585 depends on SYS_SUPPORTS_MTU2 586 default y 587 help 588 This enables build of the MTU2 timer driver. 589 590config SH_PCLK_FREQ 591 int "Peripheral clock frequency (in Hz)" 592 depends on SH_CLK_CPG_LEGACY 593 default "31250000" if CPU_SUBTYPE_SH7619 594 default "33333333" if CPU_SUBTYPE_SH7770 || \ 595 CPU_SUBTYPE_SH7760 || \ 596 CPU_SUBTYPE_SH7705 || \ 597 CPU_SUBTYPE_SH7203 || \ 598 CPU_SUBTYPE_SH7206 || \ 599 CPU_SUBTYPE_SH7263 || \ 600 CPU_SUBTYPE_MXG 601 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 602 default "66000000" if CPU_SUBTYPE_SH4_202 603 default "50000000" 604 help 605 This option is used to specify the peripheral clock frequency. 606 This is necessary for determining the reference clock value on 607 platforms lacking an RTC. 608 609config SH_CLK_CPG 610 def_bool y 611 612config SH_CLK_CPG_LEGACY 613 depends on SH_CLK_CPG 614 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 615 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 616 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 617 !CPU_SUBTYPE_SH7269 618 619endmenu 620 621menu "CPU Frequency scaling" 622source "drivers/cpufreq/Kconfig" 623endmenu 624 625source "arch/sh/drivers/Kconfig" 626 627endmenu 628 629menu "Kernel features" 630 631source kernel/Kconfig.hz 632 633config KEXEC 634 bool "kexec system call (EXPERIMENTAL)" 635 depends on SUPERH32 && MMU 636 help 637 kexec is a system call that implements the ability to shutdown your 638 current kernel, and to start another kernel. It is like a reboot 639 but it is independent of the system firmware. And like a reboot 640 you can start any kernel with it, not just Linux. 641 642 The name comes from the similarity to the exec system call. 643 644 It is an ongoing process to be certain the hardware in a machine 645 is properly shutdown, so do not be surprised if this code does not 646 initially work for you. It may help to enable device hotplugging 647 support. As of this writing the exact hardware interface is 648 strongly in flux, so no good recommendation can be made. 649 650config CRASH_DUMP 651 bool "kernel crash dumps (EXPERIMENTAL)" 652 depends on SUPERH32 && BROKEN_ON_SMP 653 help 654 Generate crash dump after being started by kexec. 655 This should be normally only set in special crash dump kernels 656 which are loaded in the main kernel with kexec-tools into 657 a specially reserved region and then later executed after 658 a crash by kdump/kexec. The crash dump kernel must be compiled 659 to a memory address not used by the main kernel using 660 PHYSICAL_START. 661 662 For more details see Documentation/kdump/kdump.txt 663 664config KEXEC_JUMP 665 bool "kexec jump (EXPERIMENTAL)" 666 depends on SUPERH32 && KEXEC && HIBERNATION 667 help 668 Jump between original kernel and kexeced kernel and invoke 669 code via KEXEC 670 671config PHYSICAL_START 672 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 673 default MEMORY_START 674 ---help--- 675 This gives the physical address where the kernel is loaded 676 and is ordinarily the same as MEMORY_START. 677 678 Different values are primarily used in the case of kexec on panic 679 where the fail safe kernel needs to run at a different address 680 than the panic-ed kernel. 681 682config SECCOMP 683 bool "Enable seccomp to safely compute untrusted bytecode" 684 depends on PROC_FS 685 help 686 This kernel feature is useful for number crunching applications 687 that may need to compute untrusted bytecode during their 688 execution. By using pipes or other transports made available to 689 the process as file descriptors supporting the read/write 690 syscalls, it's possible to isolate those applications in 691 their own address space using seccomp. Once seccomp is 692 enabled via prctl, it cannot be disabled and the task is only 693 allowed to execute a few safe syscalls defined by each seccomp 694 mode. 695 696 If unsure, say N. 697 698config CC_STACKPROTECTOR 699 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 700 depends on SUPERH32 701 help 702 This option turns on the -fstack-protector GCC feature. This 703 feature puts, at the beginning of functions, a canary value on 704 the stack just before the return address, and validates 705 the value just before actually returning. Stack based buffer 706 overflows (that need to overwrite this return address) now also 707 overwrite the canary, which gets detected and the attack is then 708 neutralized via a kernel panic. 709 710 This feature requires gcc version 4.2 or above. 711 712config SMP 713 bool "Symmetric multi-processing support" 714 depends on SYS_SUPPORTS_SMP 715 select USE_GENERIC_SMP_HELPERS 716 ---help--- 717 This enables support for systems with more than one CPU. If you have 718 a system with only one CPU, like most personal computers, say N. If 719 you have a system with more than one CPU, say Y. 720 721 If you say N here, the kernel will run on single and multiprocessor 722 machines, but will use only one CPU of a multiprocessor machine. If 723 you say Y here, the kernel will run on many, but not all, 724 singleprocessor machines. On a singleprocessor machine, the kernel 725 will run faster if you say N here. 726 727 People using multiprocessor machines who say Y here should also say 728 Y to "Enhanced Real Time Clock Support", below. 729 730 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 731 available at <http://www.tldp.org/docs.html#howto>. 732 733 If you don't know what to do here, say N. 734 735config NR_CPUS 736 int "Maximum number of CPUs (2-32)" 737 range 2 32 738 depends on SMP 739 default "4" if CPU_SUBTYPE_SHX3 740 default "2" 741 help 742 This allows you to specify the maximum number of CPUs which this 743 kernel will support. The maximum supported value is 32 and the 744 minimum value which makes sense is 2. 745 746 This is purely to save memory - each supported CPU adds 747 approximately eight kilobytes to the kernel image. 748 749config HOTPLUG_CPU 750 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 751 depends on SMP && HOTPLUG 752 help 753 Say Y here to experiment with turning CPUs off and on. CPUs 754 can be controlled through /sys/devices/system/cpu. 755 756source "kernel/Kconfig.preempt" 757 758config GUSA 759 def_bool y 760 depends on !SMP && SUPERH32 761 help 762 This enables support for gUSA (general UserSpace Atomicity). 763 This is the default implementation for both UP and non-ll/sc 764 CPUs, and is used by the libc, amongst others. 765 766 For additional information, design information can be found 767 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 768 769 This should only be disabled for special cases where alternate 770 atomicity implementations exist. 771 772config GUSA_RB 773 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 774 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 775 help 776 Enabling this option will allow the kernel to implement some 777 atomic operations using a software implementation of load-locked/ 778 store-conditional (LLSC). On machines which do not have hardware 779 LLSC, this should be more efficient than the other alternative of 780 disabling interrupts around the atomic sequence. 781 782config HW_PERF_EVENTS 783 bool "Enable hardware performance counter support for perf events" 784 depends on PERF_EVENTS && CPU_HAS_PMU 785 default y 786 help 787 Enable hardware performance counter support for perf events. If 788 disabled, perf events will use software events only. 789 790source "drivers/sh/Kconfig" 791 792endmenu 793 794menu "Boot options" 795 796config ZERO_PAGE_OFFSET 797 hex 798 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 799 SH_7751_SOLUTION_ENGINE 800 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 801 default "0x00002000" if PAGE_SIZE_8KB 802 default "0x00001000" 803 help 804 This sets the default offset of zero page. 805 806config BOOT_LINK_OFFSET 807 hex 808 default "0x00210000" if SH_SHMIN 809 default "0x00400000" if SH_CAYMAN 810 default "0x00810000" if SH_7780_SOLUTION_ENGINE 811 default "0x009e0000" if SH_TITAN 812 default "0x01800000" if SH_SDK7780 813 default "0x02000000" if SH_EDOSK7760 814 default "0x00800000" 815 help 816 This option allows you to set the link address offset of the zImage. 817 This can be useful if you are on a board which has a small amount of 818 memory. 819 820config ENTRY_OFFSET 821 hex 822 default "0x00001000" if PAGE_SIZE_4KB 823 default "0x00002000" if PAGE_SIZE_8KB 824 default "0x00004000" if PAGE_SIZE_16KB 825 default "0x00010000" if PAGE_SIZE_64KB 826 default "0x00000000" 827 828config ROMIMAGE_MMCIF 829 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 830 depends on CPU_SUBTYPE_SH7724 831 help 832 Say Y here to include experimental MMCIF loading code in 833 romImage. With this enabled it is possible to write the romImage 834 kernel image to an MMC card and boot the kernel straight from 835 the reset vector. At reset the processor Mask ROM will load the 836 first part of the romImage which in turn loads the rest the kernel 837 image to RAM using the MMCIF hardware block. 838 839choice 840 prompt "Kernel command line" 841 optional 842 default CMDLINE_OVERWRITE 843 help 844 Setting this option allows the kernel command line arguments 845 to be set. 846 847config CMDLINE_OVERWRITE 848 bool "Overwrite bootloader kernel arguments" 849 help 850 Given string will overwrite any arguments passed in by 851 a bootloader. 852 853config CMDLINE_EXTEND 854 bool "Extend bootloader kernel arguments" 855 help 856 Given string will be concatenated with arguments passed in 857 by a bootloader. 858 859endchoice 860 861config CMDLINE 862 string "Kernel command line arguments string" 863 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 864 default "console=ttySC1,115200" 865 866endmenu 867 868menu "Bus options" 869 870config SUPERHYWAY 871 tristate "SuperHyway Bus support" 872 depends on CPU_SUBTYPE_SH4_202 873 874config MAPLE 875 bool "Maple Bus support" 876 depends on SH_DREAMCAST 877 help 878 The Maple Bus is SEGA's serial communication bus for peripherals 879 on the Dreamcast. Without this bus support you won't be able to 880 get your Dreamcast keyboard etc to work, so most users 881 probably want to say 'Y' here, unless you are only using the 882 Dreamcast with a serial line terminal or a remote network 883 connection. 884 885config PCI 886 bool "PCI support" 887 depends on SYS_SUPPORTS_PCI 888 select PCI_DOMAINS 889 select GENERIC_PCI_IOMAP 890 select NO_GENERIC_PCI_IOPORT_MAP 891 help 892 Find out whether you have a PCI motherboard. PCI is the name of a 893 bus system, i.e. the way the CPU talks to the other stuff inside 894 your box. If you have PCI, say Y, otherwise N. 895 896config PCI_DOMAINS 897 bool 898 899source "drivers/pci/pcie/Kconfig" 900 901source "drivers/pci/Kconfig" 902 903source "drivers/pcmcia/Kconfig" 904 905source "drivers/pci/hotplug/Kconfig" 906 907endmenu 908 909menu "Executable file formats" 910 911source "fs/Kconfig.binfmt" 912 913endmenu 914 915menu "Power management options (EXPERIMENTAL)" 916 917source "kernel/power/Kconfig" 918 919source "drivers/cpuidle/Kconfig" 920 921endmenu 922 923source "net/Kconfig" 924 925source "drivers/Kconfig" 926 927source "fs/Kconfig" 928 929source "arch/sh/Kconfig.debug" 930 931source "security/Kconfig" 932 933source "crypto/Kconfig" 934 935source "lib/Kconfig" 936