1# 2# For a description of the syntax of this configuration file, 3# see Documentation/kbuild/kconfig-language.txt. 4# 5 6mainmenu "Linux/SuperH Kernel Configuration" 7 8config SUPERH 9 def_bool y 10 select EMBEDDED 11 select HAVE_CLK 12 select HAVE_IDE 13 select HAVE_LMB 14 select HAVE_OPROFILE 15 select HAVE_GENERIC_DMA_COHERENT 16 select HAVE_ARCH_TRACEHOOK 17 select HAVE_DMA_API_DEBUG 18 select HAVE_DMA_ATTRS 19 select HAVE_PERF_EVENTS 20 select PERF_USE_VMALLOC 21 select HAVE_KERNEL_GZIP 22 select HAVE_KERNEL_BZIP2 23 select HAVE_KERNEL_LZMA 24 select HAVE_KERNEL_LZO 25 select HAVE_SYSCALL_TRACEPOINTS 26 select RTC_LIB 27 select GENERIC_ATOMIC64 28 help 29 The SuperH is a RISC processor targeted for use in embedded systems 30 and consumer electronics; it was also used in the Sega Dreamcast 31 gaming console. The SuperH port has a home page at 32 <http://www.linux-sh.org/>. 33 34config SUPERH32 35 def_bool ARCH = "sh" 36 select HAVE_KPROBES 37 select HAVE_KRETPROBES 38 select HAVE_IOREMAP_PROT if MMU && !X2TLB 39 select HAVE_FUNCTION_TRACER 40 select HAVE_FTRACE_MCOUNT_RECORD 41 select HAVE_DYNAMIC_FTRACE 42 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 43 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 44 select HAVE_FUNCTION_GRAPH_TRACER 45 select HAVE_ARCH_KGDB 46 select HAVE_HW_BREAKPOINT 47 select HAVE_MIXED_BREAKPOINTS_REGS 48 select PERF_EVENTS if HAVE_HW_BREAKPOINT 49 select ARCH_HIBERNATION_POSSIBLE if MMU 50 51config SUPERH64 52 def_bool ARCH = "sh64" 53 54config ARCH_DEFCONFIG 55 string 56 default "arch/sh/configs/shx3_defconfig" if SUPERH32 57 default "arch/sh/configs/cayman_defconfig" if SUPERH64 58 59config RWSEM_GENERIC_SPINLOCK 60 def_bool y 61 62config RWSEM_XCHGADD_ALGORITHM 63 bool 64 65config GENERIC_BUG 66 def_bool y 67 depends on BUG && SUPERH32 68 69config GENERIC_CSUM 70 def_bool y 71 depends on SUPERH64 72 73config GENERIC_FIND_NEXT_BIT 74 def_bool y 75 76config GENERIC_HWEIGHT 77 def_bool y 78 79config GENERIC_HARDIRQS 80 def_bool y 81 82config GENERIC_HARDIRQS_NO__DO_IRQ 83 def_bool y 84 85config IRQ_PER_CPU 86 def_bool y 87 88config SPARSE_IRQ 89 def_bool y 90 depends on SUPERH32 91 92config GENERIC_GPIO 93 def_bool n 94 95config GENERIC_CALIBRATE_DELAY 96 bool 97 98config GENERIC_IOMAP 99 bool 100 101config GENERIC_TIME 102 def_bool y 103 104config GENERIC_CLOCKEVENTS 105 def_bool y 106 107config GENERIC_CLOCKEVENTS_BROADCAST 108 bool 109 110config GENERIC_CMOS_UPDATE 111 def_bool y 112 depends on SH_SH03 || SH_DREAMCAST 113 114config GENERIC_LOCKBREAK 115 def_bool y 116 depends on SMP && PREEMPT 117 118config SYS_SUPPORTS_PM 119 bool 120 depends on !SMP 121 122config ARCH_SUSPEND_POSSIBLE 123 def_bool n 124 125config ARCH_HIBERNATION_POSSIBLE 126 def_bool n 127 128config SYS_SUPPORTS_APM_EMULATION 129 bool 130 select ARCH_SUSPEND_POSSIBLE 131 132config SYS_SUPPORTS_HUGETLBFS 133 bool 134 135config SYS_SUPPORTS_SMP 136 bool 137 138config SYS_SUPPORTS_NUMA 139 bool 140 141config SYS_SUPPORTS_PCI 142 bool 143 144config SYS_SUPPORTS_CMT 145 bool 146 147config SYS_SUPPORTS_MTU2 148 bool 149 150config SYS_SUPPORTS_TMU 151 bool 152 153config STACKTRACE_SUPPORT 154 def_bool y 155 156config LOCKDEP_SUPPORT 157 def_bool y 158 159config HAVE_LATENCYTOP_SUPPORT 160 def_bool y 161 162config ARCH_HAS_ILOG2_U32 163 def_bool n 164 165config ARCH_HAS_ILOG2_U64 166 def_bool n 167 168config ARCH_NO_VIRT_TO_BUS 169 def_bool y 170 171config ARCH_HAS_DEFAULT_IDLE 172 def_bool y 173 174config ARCH_HAS_CPU_IDLE_WAIT 175 def_bool y 176 177config IO_TRAPPED 178 bool 179 180config DMA_COHERENT 181 bool 182 183config DMA_NONCOHERENT 184 def_bool !DMA_COHERENT 185 186config NEED_DMA_MAP_STATE 187 def_bool DMA_NONCOHERENT 188 189source "init/Kconfig" 190 191source "kernel/Kconfig.freezer" 192 193menu "System type" 194 195# 196# Processor families 197# 198config CPU_SH2 199 bool 200 201config CPU_SH2A 202 bool 203 select CPU_SH2 204 205config CPU_SH3 206 bool 207 select CPU_HAS_INTEVT 208 select CPU_HAS_SR_RB 209 select SYS_SUPPORTS_TMU 210 211config CPU_SH4 212 bool 213 select CPU_HAS_INTEVT 214 select CPU_HAS_SR_RB 215 select CPU_HAS_FPU if !CPU_SH4AL_DSP 216 select SYS_SUPPORTS_TMU 217 select SYS_SUPPORTS_HUGETLBFS if MMU 218 219config CPU_SH4A 220 bool 221 select CPU_SH4 222 223config CPU_SH4AL_DSP 224 bool 225 select CPU_SH4A 226 select CPU_HAS_DSP 227 228config CPU_SH5 229 bool 230 select CPU_HAS_FPU 231 select SYS_SUPPORTS_TMU 232 select SYS_SUPPORTS_HUGETLBFS if MMU 233 234config CPU_SHX2 235 bool 236 237config CPU_SHX3 238 bool 239 select DMA_COHERENT 240 select SYS_SUPPORTS_SMP 241 select SYS_SUPPORTS_NUMA 242 243config ARCH_SHMOBILE 244 bool 245 select ARCH_SUSPEND_POSSIBLE 246 select PM 247 select PM_RUNTIME 248 249if SUPERH32 250 251choice 252 prompt "Processor sub-type selection" 253 254# 255# Processor subtypes 256# 257 258# SH-2 Processor Support 259 260config CPU_SUBTYPE_SH7619 261 bool "Support SH7619 processor" 262 select CPU_SH2 263 select SYS_SUPPORTS_CMT 264 265# SH-2A Processor Support 266 267config CPU_SUBTYPE_SH7201 268 bool "Support SH7201 processor" 269 select CPU_SH2A 270 select CPU_HAS_FPU 271 select SYS_SUPPORTS_MTU2 272 273config CPU_SUBTYPE_SH7203 274 bool "Support SH7203 processor" 275 select CPU_SH2A 276 select CPU_HAS_FPU 277 select SYS_SUPPORTS_CMT 278 select SYS_SUPPORTS_MTU2 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_MXG 294 bool "Support MX-G processor" 295 select CPU_SH2A 296 select SYS_SUPPORTS_MTU2 297 help 298 Select MX-G if running on an R8A03022BG part. 299 300# SH-3 Processor Support 301 302config CPU_SUBTYPE_SH7705 303 bool "Support SH7705 processor" 304 select CPU_SH3 305 306config CPU_SUBTYPE_SH7706 307 bool "Support SH7706 processor" 308 select CPU_SH3 309 help 310 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 311 312config CPU_SUBTYPE_SH7707 313 bool "Support SH7707 processor" 314 select CPU_SH3 315 help 316 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 317 318config CPU_SUBTYPE_SH7708 319 bool "Support SH7708 processor" 320 select CPU_SH3 321 help 322 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 323 if you have a 100 Mhz SH-3 HD6417708R CPU. 324 325config CPU_SUBTYPE_SH7709 326 bool "Support SH7709 processor" 327 select CPU_SH3 328 help 329 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 330 331config CPU_SUBTYPE_SH7710 332 bool "Support SH7710 processor" 333 select CPU_SH3 334 select CPU_HAS_DSP 335 help 336 Select SH7710 if you have a SH3-DSP SH7710 CPU. 337 338config CPU_SUBTYPE_SH7712 339 bool "Support SH7712 processor" 340 select CPU_SH3 341 select CPU_HAS_DSP 342 help 343 Select SH7712 if you have a SH3-DSP SH7712 CPU. 344 345config CPU_SUBTYPE_SH7720 346 bool "Support SH7720 processor" 347 select CPU_SH3 348 select CPU_HAS_DSP 349 select SYS_SUPPORTS_CMT 350 help 351 Select SH7720 if you have a SH3-DSP SH7720 CPU. 352 353config CPU_SUBTYPE_SH7721 354 bool "Support SH7721 processor" 355 select CPU_SH3 356 select CPU_HAS_DSP 357 select SYS_SUPPORTS_CMT 358 help 359 Select SH7721 if you have a SH3-DSP SH7721 CPU. 360 361# SH-4 Processor Support 362 363config CPU_SUBTYPE_SH7750 364 bool "Support SH7750 processor" 365 select CPU_SH4 366 help 367 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 368 369config CPU_SUBTYPE_SH7091 370 bool "Support SH7091 processor" 371 select CPU_SH4 372 help 373 Select SH7091 if you have an SH-4 based Sega device (such as 374 the Dreamcast, Naomi, and Naomi 2). 375 376config CPU_SUBTYPE_SH7750R 377 bool "Support SH7750R processor" 378 select CPU_SH4 379 380config CPU_SUBTYPE_SH7750S 381 bool "Support SH7750S processor" 382 select CPU_SH4 383 384config CPU_SUBTYPE_SH7751 385 bool "Support SH7751 processor" 386 select CPU_SH4 387 help 388 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 389 or if you have a HD6417751R CPU. 390 391config CPU_SUBTYPE_SH7751R 392 bool "Support SH7751R processor" 393 select CPU_SH4 394 395config CPU_SUBTYPE_SH7760 396 bool "Support SH7760 processor" 397 select CPU_SH4 398 399config CPU_SUBTYPE_SH4_202 400 bool "Support SH4-202 processor" 401 select CPU_SH4 402 403# SH-4A Processor Support 404 405config CPU_SUBTYPE_SH7723 406 bool "Support SH7723 processor" 407 select CPU_SH4A 408 select CPU_SHX2 409 select ARCH_SHMOBILE 410 select ARCH_SPARSEMEM_ENABLE 411 select SYS_SUPPORTS_CMT 412 help 413 Select SH7723 if you have an SH-MobileR2 CPU. 414 415config CPU_SUBTYPE_SH7724 416 bool "Support SH7724 processor" 417 select CPU_SH4A 418 select CPU_SHX2 419 select ARCH_SHMOBILE 420 select ARCH_SPARSEMEM_ENABLE 421 select SYS_SUPPORTS_CMT 422 help 423 Select SH7724 if you have an SH-MobileR2R CPU. 424 425config CPU_SUBTYPE_SH7757 426 bool "Support SH7757 processor" 427 select CPU_SH4A 428 select CPU_SHX2 429 help 430 Select SH7757 if you have a SH4A SH7757 CPU. 431 432config CPU_SUBTYPE_SH7763 433 bool "Support SH7763 processor" 434 select CPU_SH4A 435 help 436 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 437 438config CPU_SUBTYPE_SH7770 439 bool "Support SH7770 processor" 440 select CPU_SH4A 441 442config CPU_SUBTYPE_SH7780 443 bool "Support SH7780 processor" 444 select CPU_SH4A 445 446config 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 453config CPU_SUBTYPE_SH7786 454 bool "Support SH7786 processor" 455 select CPU_SH4A 456 select CPU_SHX3 457 select CPU_HAS_PTEAEX 458 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 459 460config CPU_SUBTYPE_SHX3 461 bool "Support SH-X3 processor" 462 select CPU_SH4A 463 select CPU_SHX3 464 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 465 466# SH4AL-DSP Processor Support 467 468config CPU_SUBTYPE_SH7343 469 bool "Support SH7343 processor" 470 select CPU_SH4AL_DSP 471 select ARCH_SHMOBILE 472 select SYS_SUPPORTS_CMT 473 474config CPU_SUBTYPE_SH7722 475 bool "Support SH7722 processor" 476 select CPU_SH4AL_DSP 477 select CPU_SHX2 478 select ARCH_SHMOBILE 479 select ARCH_SPARSEMEM_ENABLE 480 select SYS_SUPPORTS_NUMA 481 select SYS_SUPPORTS_CMT 482 483config CPU_SUBTYPE_SH7366 484 bool "Support SH7366 processor" 485 select CPU_SH4AL_DSP 486 select CPU_SHX2 487 select ARCH_SHMOBILE 488 select ARCH_SPARSEMEM_ENABLE 489 select SYS_SUPPORTS_NUMA 490 select SYS_SUPPORTS_CMT 491 492endchoice 493 494endif 495 496if SUPERH64 497 498choice 499 prompt "Processor sub-type selection" 500 501# SH-5 Processor Support 502 503config CPU_SUBTYPE_SH5_101 504 bool "Support SH5-101 processor" 505 select CPU_SH5 506 507config CPU_SUBTYPE_SH5_103 508 bool "Support SH5-103 processor" 509 select CPU_SH5 510 511endchoice 512 513endif 514 515source "arch/sh/mm/Kconfig" 516 517source "arch/sh/Kconfig.cpu" 518 519source "arch/sh/boards/Kconfig" 520 521menu "Timer and clock configuration" 522 523config SH_TIMER_TMU 524 bool "TMU timer driver" 525 depends on SYS_SUPPORTS_TMU 526 default y 527 help 528 This enables the build of the TMU timer driver. 529 530config SH_TIMER_CMT 531 bool "CMT timer driver" 532 depends on SYS_SUPPORTS_CMT 533 default y 534 help 535 This enables build of the CMT timer driver. 536 537config SH_TIMER_MTU2 538 bool "MTU2 timer driver" 539 depends on SYS_SUPPORTS_MTU2 540 default y 541 help 542 This enables build of the MTU2 timer driver. 543 544config SH_PCLK_FREQ 545 int "Peripheral clock frequency (in Hz)" 546 depends on SH_CLK_CPG_LEGACY 547 default "31250000" if CPU_SUBTYPE_SH7619 548 default "33333333" if CPU_SUBTYPE_SH7770 || \ 549 CPU_SUBTYPE_SH7760 || \ 550 CPU_SUBTYPE_SH7705 || \ 551 CPU_SUBTYPE_SH7203 || \ 552 CPU_SUBTYPE_SH7206 || \ 553 CPU_SUBTYPE_SH7263 || \ 554 CPU_SUBTYPE_MXG 555 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 556 default "66000000" if CPU_SUBTYPE_SH4_202 557 default "50000000" 558 help 559 This option is used to specify the peripheral clock frequency. 560 This is necessary for determining the reference clock value on 561 platforms lacking an RTC. 562 563config SH_CLK_CPG 564 def_bool y 565 566config SH_CLK_CPG_LEGACY 567 depends on SH_CLK_CPG 568 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 569 !CPU_SUBTYPE_SH7786 570 571config SH_CLK_MD 572 int "CPU Mode Pin Setting" 573 depends on CPU_SH2 574 default 6 if CPU_SUBTYPE_SH7206 575 default 5 if CPU_SUBTYPE_SH7619 576 default 0 577 help 578 MD2 - MD0 pin setting. 579 580source "kernel/time/Kconfig" 581 582endmenu 583 584menu "CPU Frequency scaling" 585 586source "drivers/cpufreq/Kconfig" 587 588config SH_CPU_FREQ 589 tristate "SuperH CPU Frequency driver" 590 depends on CPU_FREQ 591 select CPU_FREQ_TABLE 592 help 593 This adds the cpufreq driver for SuperH. Any CPU that supports 594 clock rate rounding through the clock framework can use this 595 driver. While it will make the kernel slightly larger, this is 596 harmless for CPUs that don't support rate rounding. The driver 597 will also generate a notice in the boot log before disabling 598 itself if the CPU in question is not capable of rate rounding. 599 600 For details, take a look at <file:Documentation/cpu-freq>. 601 602 If unsure, say N. 603 604endmenu 605 606source "arch/sh/drivers/Kconfig" 607 608endmenu 609 610menu "Kernel features" 611 612source kernel/Kconfig.hz 613 614config KEXEC 615 bool "kexec system call (EXPERIMENTAL)" 616 depends on SUPERH32 && EXPERIMENTAL && MMU 617 help 618 kexec is a system call that implements the ability to shutdown your 619 current kernel, and to start another kernel. It is like a reboot 620 but it is independent of the system firmware. And like a reboot 621 you can start any kernel with it, not just Linux. 622 623 The name comes from the similarity to the exec system call. 624 625 It is an ongoing process to be certain the hardware in a machine 626 is properly shutdown, so do not be surprised if this code does not 627 initially work for you. It may help to enable device hotplugging 628 support. As of this writing the exact hardware interface is 629 strongly in flux, so no good recommendation can be made. 630 631config CRASH_DUMP 632 bool "kernel crash dumps (EXPERIMENTAL)" 633 depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP 634 help 635 Generate crash dump after being started by kexec. 636 This should be normally only set in special crash dump kernels 637 which are loaded in the main kernel with kexec-tools into 638 a specially reserved region and then later executed after 639 a crash by kdump/kexec. The crash dump kernel must be compiled 640 to a memory address not used by the main kernel using 641 MEMORY_START. 642 643 For more details see Documentation/kdump/kdump.txt 644 645config KEXEC_JUMP 646 bool "kexec jump (EXPERIMENTAL)" 647 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL 648 help 649 Jump between original kernel and kexeced kernel and invoke 650 code via KEXEC 651 652config SECCOMP 653 bool "Enable seccomp to safely compute untrusted bytecode" 654 depends on PROC_FS 655 help 656 This kernel feature is useful for number crunching applications 657 that may need to compute untrusted bytecode during their 658 execution. By using pipes or other transports made available to 659 the process as file descriptors supporting the read/write 660 syscalls, it's possible to isolate those applications in 661 their own address space using seccomp. Once seccomp is 662 enabled via prctl, it cannot be disabled and the task is only 663 allowed to execute a few safe syscalls defined by each seccomp 664 mode. 665 666 If unsure, say N. 667 668config SMP 669 bool "Symmetric multi-processing support" 670 depends on SYS_SUPPORTS_SMP 671 select USE_GENERIC_SMP_HELPERS 672 ---help--- 673 This enables support for systems with more than one CPU. If you have 674 a system with only one CPU, like most personal computers, say N. If 675 you have a system with more than one CPU, say Y. 676 677 If you say N here, the kernel will run on single and multiprocessor 678 machines, but will use only one CPU of a multiprocessor machine. If 679 you say Y here, the kernel will run on many, but not all, 680 singleprocessor machines. On a singleprocessor machine, the kernel 681 will run faster if you say N here. 682 683 People using multiprocessor machines who say Y here should also say 684 Y to "Enhanced Real Time Clock Support", below. 685 686 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 687 available at <http://www.tldp.org/docs.html#howto>. 688 689 If you don't know what to do here, say N. 690 691config NR_CPUS 692 int "Maximum number of CPUs (2-32)" 693 range 2 32 694 depends on SMP 695 default "4" if CPU_SUBTYPE_SHX3 696 default "2" 697 help 698 This allows you to specify the maximum number of CPUs which this 699 kernel will support. The maximum supported value is 32 and the 700 minimum value which makes sense is 2. 701 702 This is purely to save memory - each supported CPU adds 703 approximately eight kilobytes to the kernel image. 704 705config HOTPLUG_CPU 706 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 707 depends on SMP && HOTPLUG && EXPERIMENTAL 708 help 709 Say Y here to experiment with turning CPUs off and on. CPUs 710 can be controlled through /sys/devices/system/cpu. 711 712source "kernel/Kconfig.preempt" 713 714config GUSA 715 def_bool y 716 depends on !SMP && SUPERH32 717 help 718 This enables support for gUSA (general UserSpace Atomicity). 719 This is the default implementation for both UP and non-ll/sc 720 CPUs, and is used by the libc, amongst others. 721 722 For additional information, design information can be found 723 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 724 725 This should only be disabled for special cases where alternate 726 atomicity implementations exist. 727 728config GUSA_RB 729 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 730 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 731 help 732 Enabling this option will allow the kernel to implement some 733 atomic operations using a software implementation of load-locked/ 734 store-conditional (LLSC). On machines which do not have hardware 735 LLSC, this should be more efficient than the other alternative of 736 disabling interrupts around the atomic sequence. 737 738source "drivers/sh/Kconfig" 739 740endmenu 741 742menu "Boot options" 743 744config ZERO_PAGE_OFFSET 745 hex 746 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 747 SH_7751_SOLUTION_ENGINE 748 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 749 default "0x00002000" if PAGE_SIZE_8KB 750 default "0x00001000" 751 help 752 This sets the default offset of zero page. 753 754config BOOT_LINK_OFFSET 755 hex 756 default "0x00210000" if SH_SHMIN 757 default "0x00400000" if SH_CAYMAN 758 default "0x00810000" if SH_7780_SOLUTION_ENGINE 759 default "0x009e0000" if SH_TITAN 760 default "0x01800000" if SH_SDK7780 761 default "0x02000000" if SH_EDOSK7760 762 default "0x00800000" 763 help 764 This option allows you to set the link address offset of the zImage. 765 This can be useful if you are on a board which has a small amount of 766 memory. 767 768config ENTRY_OFFSET 769 hex 770 default "0x00001000" if PAGE_SIZE_4KB 771 default "0x00002000" if PAGE_SIZE_8KB 772 default "0x00004000" if PAGE_SIZE_16KB 773 default "0x00010000" if PAGE_SIZE_64KB 774 default "0x00000000" 775 776choice 777 prompt "Kernel command line" 778 optional 779 default CMDLINE_OVERWRITE 780 help 781 Setting this option allows the kernel command line arguments 782 to be set. 783 784config CMDLINE_OVERWRITE 785 bool "Overwrite bootloader kernel arguments" 786 help 787 Given string will overwrite any arguments passed in by 788 a bootloader. 789 790config CMDLINE_EXTEND 791 bool "Extend bootloader kernel arguments" 792 help 793 Given string will be concatenated with arguments passed in 794 by a bootloader. 795 796endchoice 797 798config CMDLINE 799 string "Kernel command line arguments string" 800 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 801 default "console=ttySC1,115200" 802 803endmenu 804 805menu "Bus options" 806 807config SUPERHYWAY 808 tristate "SuperHyway Bus support" 809 depends on CPU_SUBTYPE_SH4_202 810 811config MAPLE 812 bool "Maple Bus support" 813 depends on SH_DREAMCAST 814 help 815 The Maple Bus is SEGA's serial communication bus for peripherals 816 on the Dreamcast. Without this bus support you won't be able to 817 get your Dreamcast keyboard etc to work, so most users 818 probably want to say 'Y' here, unless you are only using the 819 Dreamcast with a serial line terminal or a remote network 820 connection. 821 822config PCI 823 bool "PCI support" 824 depends on SYS_SUPPORTS_PCI 825 select PCI_DOMAINS 826 help 827 Find out whether you have a PCI motherboard. PCI is the name of a 828 bus system, i.e. the way the CPU talks to the other stuff inside 829 your box. If you have PCI, say Y, otherwise N. 830 831config PCI_DOMAINS 832 bool 833 834source "drivers/pci/pcie/Kconfig" 835 836source "drivers/pci/Kconfig" 837 838source "drivers/pcmcia/Kconfig" 839 840source "drivers/pci/hotplug/Kconfig" 841 842endmenu 843 844menu "Executable file formats" 845 846source "fs/Kconfig.binfmt" 847 848endmenu 849 850menu "Power management options (EXPERIMENTAL)" 851depends on EXPERIMENTAL 852 853source "kernel/power/Kconfig" 854 855source "drivers/cpuidle/Kconfig" 856 857endmenu 858 859source "net/Kconfig" 860 861source "drivers/Kconfig" 862 863source "fs/Kconfig" 864 865source "arch/sh/Kconfig.debug" 866 867source "security/Kconfig" 868 869source "crypto/Kconfig" 870 871menuconfig VIRTUALIZATION 872 bool "Virtualization" 873 default n 874 ---help--- 875 Say Y here to get to see options for using your Linux host to run other 876 operating systems inside virtual machines (guests). 877 This option alone does not add any kernel code. 878 879 If you say N, all options in this submenu will be skipped and disabled. 880 881if VIRTUALIZATION 882 883source drivers/virtio/Kconfig 884 885endif # VIRTUALIZATION 886 887source "lib/Kconfig" 888