1# SPDX-License-Identifier: GPL-2.0 2config SUPERH 3 def_bool y 4 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 5 select ARCH_MIGHT_HAVE_PC_PARPORT 6 select ARCH_NO_COHERENT_DMA_MMAP if !MMU 7 select HAVE_PATA_PLATFORM 8 select CLKDEV_LOOKUP 9 select HAVE_IDE if HAS_IOPORT_MAP 10 select HAVE_MEMBLOCK 11 select HAVE_MEMBLOCK_NODE_MAP 12 select NO_BOOTMEM 13 select ARCH_DISCARD_MEMBLOCK 14 select HAVE_OPROFILE 15 select HAVE_GENERIC_DMA_COHERENT 16 select HAVE_ARCH_TRACEHOOK 17 select HAVE_DMA_API_DEBUG 18 select HAVE_PERF_EVENTS 19 select HAVE_DEBUG_BUGVERBOSE 20 select ARCH_HAVE_CUSTOM_GPIO_H 21 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 22 select ARCH_HAS_GCOV_PROFILE_ALL 23 select PERF_USE_VMALLOC 24 select HAVE_DEBUG_KMEMLEAK 25 select HAVE_KERNEL_GZIP 26 select CPU_NO_EFFICIENT_FFS 27 select HAVE_KERNEL_BZIP2 28 select HAVE_KERNEL_LZMA 29 select HAVE_KERNEL_XZ 30 select HAVE_KERNEL_LZO 31 select HAVE_UID16 32 select ARCH_WANT_IPC_PARSE_VERSION 33 select HAVE_SYSCALL_TRACEPOINTS 34 select HAVE_REGS_AND_STACK_ACCESS_API 35 select MAY_HAVE_SPARSE_IRQ 36 select IRQ_FORCED_THREADING 37 select RTC_LIB 38 select GENERIC_ATOMIC64 39 select GENERIC_IRQ_SHOW 40 select GENERIC_SMP_IDLE_THREAD 41 select GENERIC_IDLE_POLL_SETUP 42 select GENERIC_CLOCKEVENTS 43 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 44 select GENERIC_SCHED_CLOCK 45 select GENERIC_STRNCPY_FROM_USER 46 select GENERIC_STRNLEN_USER 47 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 48 select MODULES_USE_ELF_RELA 49 select OLD_SIGSUSPEND 50 select OLD_SIGACTION 51 select HAVE_ARCH_AUDITSYSCALL 52 select HAVE_FUTEX_CMPXCHG if FUTEX 53 select HAVE_NMI 54 help 55 The SuperH is a RISC processor targeted for use in embedded systems 56 and consumer electronics; it was also used in the Sega Dreamcast 57 gaming console. The SuperH port has a home page at 58 <http://www.linux-sh.org/>. 59 60config SUPERH32 61 def_bool ARCH = "sh" 62 select HAVE_KPROBES 63 select HAVE_KRETPROBES 64 select HAVE_IOREMAP_PROT if MMU && !X2TLB 65 select HAVE_FUNCTION_TRACER 66 select HAVE_FTRACE_MCOUNT_RECORD 67 select HAVE_DYNAMIC_FTRACE 68 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 69 select ARCH_WANT_IPC_PARSE_VERSION 70 select HAVE_FUNCTION_GRAPH_TRACER 71 select HAVE_ARCH_KGDB 72 select HAVE_HW_BREAKPOINT 73 select HAVE_MIXED_BREAKPOINTS_REGS 74 select PERF_EVENTS 75 select ARCH_HIBERNATION_POSSIBLE if MMU 76 select SPARSE_IRQ 77 select HAVE_CC_STACKPROTECTOR 78 79config SUPERH64 80 def_bool ARCH = "sh64" 81 select HAVE_EXIT_THREAD 82 select KALLSYMS 83 84config ARCH_DEFCONFIG 85 string 86 default "arch/sh/configs/shx3_defconfig" if SUPERH32 87 default "arch/sh/configs/cayman_defconfig" if SUPERH64 88 89config RWSEM_GENERIC_SPINLOCK 90 def_bool y 91 92config RWSEM_XCHGADD_ALGORITHM 93 bool 94 95config GENERIC_BUG 96 def_bool y 97 depends on BUG && SUPERH32 98 99config GENERIC_CSUM 100 def_bool y 101 depends on SUPERH64 102 103config GENERIC_HWEIGHT 104 def_bool y 105 106config GENERIC_CALIBRATE_DELAY 107 bool 108 109config GENERIC_LOCKBREAK 110 def_bool y 111 depends on SMP && PREEMPT 112 113config ARCH_SUSPEND_POSSIBLE 114 def_bool n 115 116config ARCH_HIBERNATION_POSSIBLE 117 def_bool n 118 119config SYS_SUPPORTS_APM_EMULATION 120 bool 121 select ARCH_SUSPEND_POSSIBLE 122 123config SYS_SUPPORTS_HUGETLBFS 124 bool 125 126config SYS_SUPPORTS_SMP 127 bool 128 129config SYS_SUPPORTS_NUMA 130 bool 131 132config SYS_SUPPORTS_PCI 133 bool 134 135config STACKTRACE_SUPPORT 136 def_bool y 137 138config LOCKDEP_SUPPORT 139 def_bool y 140 141config ARCH_HAS_ILOG2_U32 142 def_bool n 143 144config ARCH_HAS_ILOG2_U64 145 def_bool n 146 147config NO_IOPORT_MAP 148 def_bool !PCI 149 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 150 !SH_HP6XX && !SH_SOLUTION_ENGINE 151 152config IO_TRAPPED 153 bool 154 155config SWAP_IO_SPACE 156 bool 157 158config DMA_COHERENT 159 bool 160 161config DMA_NONCOHERENT 162 def_bool !DMA_COHERENT 163 164config NEED_DMA_MAP_STATE 165 def_bool DMA_NONCOHERENT 166 167config NEED_SG_DMA_LENGTH 168 def_bool y 169 170config PGTABLE_LEVELS 171 default 3 if X2TLB 172 default 2 173 174source "init/Kconfig" 175 176source "kernel/Kconfig.freezer" 177 178menu "System type" 179 180# 181# Processor families 182# 183config CPU_SH2 184 bool 185 select SH_INTC 186 187config CPU_SH2A 188 bool 189 select CPU_SH2 190 select UNCACHED_MAPPING 191 192config CPU_J2 193 bool 194 select CPU_SH2 195 select OF 196 select OF_EARLY_FLATTREE 197 198config CPU_SH3 199 bool 200 select CPU_HAS_INTEVT 201 select CPU_HAS_SR_RB 202 select SH_INTC 203 select SYS_SUPPORTS_SH_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 SH_INTC 211 select SYS_SUPPORTS_SH_TMU 212 select SYS_SUPPORTS_HUGETLBFS if MMU 213 214config CPU_SH4A 215 bool 216 select CPU_SH4 217 218config CPU_SH4AL_DSP 219 bool 220 select CPU_SH4A 221 select CPU_HAS_DSP 222 223config CPU_SH5 224 bool 225 select CPU_HAS_FPU 226 select SYS_SUPPORTS_SH_TMU 227 select SYS_SUPPORTS_HUGETLBFS if MMU 228 229config CPU_SHX2 230 bool 231 232config CPU_SHX3 233 bool 234 select DMA_COHERENT 235 select SYS_SUPPORTS_SMP 236 select SYS_SUPPORTS_NUMA 237 238config ARCH_SHMOBILE 239 bool 240 select ARCH_SUSPEND_POSSIBLE 241 select PM 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_SH_CMT 263 264config CPU_SUBTYPE_J2 265 bool "Support J2 processor" 266 select CPU_J2 267 select SYS_SUPPORTS_SMP 268 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 269 270# SH-2A Processor Support 271 272config CPU_SUBTYPE_SH7201 273 bool "Support SH7201 processor" 274 select CPU_SH2A 275 select CPU_HAS_FPU 276 select SYS_SUPPORTS_SH_MTU2 277 278config CPU_SUBTYPE_SH7203 279 bool "Support SH7203 processor" 280 select CPU_SH2A 281 select CPU_HAS_FPU 282 select SYS_SUPPORTS_SH_CMT 283 select SYS_SUPPORTS_SH_MTU2 284 select PINCTRL 285 286config CPU_SUBTYPE_SH7206 287 bool "Support SH7206 processor" 288 select CPU_SH2A 289 select SYS_SUPPORTS_SH_CMT 290 select SYS_SUPPORTS_SH_MTU2 291 292config CPU_SUBTYPE_SH7263 293 bool "Support SH7263 processor" 294 select CPU_SH2A 295 select CPU_HAS_FPU 296 select SYS_SUPPORTS_SH_CMT 297 select SYS_SUPPORTS_SH_MTU2 298 299config CPU_SUBTYPE_SH7264 300 bool "Support SH7264 processor" 301 select CPU_SH2A 302 select CPU_HAS_FPU 303 select SYS_SUPPORTS_SH_CMT 304 select SYS_SUPPORTS_SH_MTU2 305 select PINCTRL 306 307config CPU_SUBTYPE_SH7269 308 bool "Support SH7269 processor" 309 select CPU_SH2A 310 select CPU_HAS_FPU 311 select SYS_SUPPORTS_SH_CMT 312 select SYS_SUPPORTS_SH_MTU2 313 select PINCTRL 314 315config CPU_SUBTYPE_MXG 316 bool "Support MX-G processor" 317 select CPU_SH2A 318 select SYS_SUPPORTS_SH_MTU2 319 help 320 Select MX-G if running on an R8A03022BG part. 321 322# SH-3 Processor Support 323 324config CPU_SUBTYPE_SH7705 325 bool "Support SH7705 processor" 326 select CPU_SH3 327 328config CPU_SUBTYPE_SH7706 329 bool "Support SH7706 processor" 330 select CPU_SH3 331 help 332 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 333 334config CPU_SUBTYPE_SH7707 335 bool "Support SH7707 processor" 336 select CPU_SH3 337 help 338 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 339 340config CPU_SUBTYPE_SH7708 341 bool "Support SH7708 processor" 342 select CPU_SH3 343 help 344 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 345 if you have a 100 Mhz SH-3 HD6417708R CPU. 346 347config CPU_SUBTYPE_SH7709 348 bool "Support SH7709 processor" 349 select CPU_SH3 350 help 351 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 352 353config CPU_SUBTYPE_SH7710 354 bool "Support SH7710 processor" 355 select CPU_SH3 356 select CPU_HAS_DSP 357 help 358 Select SH7710 if you have a SH3-DSP SH7710 CPU. 359 360config CPU_SUBTYPE_SH7712 361 bool "Support SH7712 processor" 362 select CPU_SH3 363 select CPU_HAS_DSP 364 help 365 Select SH7712 if you have a SH3-DSP SH7712 CPU. 366 367config CPU_SUBTYPE_SH7720 368 bool "Support SH7720 processor" 369 select CPU_SH3 370 select CPU_HAS_DSP 371 select SYS_SUPPORTS_SH_CMT 372 select USB_OHCI_SH if USB_OHCI_HCD 373 select PINCTRL 374 help 375 Select SH7720 if you have a SH3-DSP SH7720 CPU. 376 377config CPU_SUBTYPE_SH7721 378 bool "Support SH7721 processor" 379 select CPU_SH3 380 select CPU_HAS_DSP 381 select SYS_SUPPORTS_SH_CMT 382 select USB_OHCI_SH if USB_OHCI_HCD 383 help 384 Select SH7721 if you have a SH3-DSP SH7721 CPU. 385 386# SH-4 Processor Support 387 388config CPU_SUBTYPE_SH7750 389 bool "Support SH7750 processor" 390 select CPU_SH4 391 help 392 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 393 394config CPU_SUBTYPE_SH7091 395 bool "Support SH7091 processor" 396 select CPU_SH4 397 help 398 Select SH7091 if you have an SH-4 based Sega device (such as 399 the Dreamcast, Naomi, and Naomi 2). 400 401config CPU_SUBTYPE_SH7750R 402 bool "Support SH7750R processor" 403 select CPU_SH4 404 405config CPU_SUBTYPE_SH7750S 406 bool "Support SH7750S processor" 407 select CPU_SH4 408 409config CPU_SUBTYPE_SH7751 410 bool "Support SH7751 processor" 411 select CPU_SH4 412 help 413 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 414 or if you have a HD6417751R CPU. 415 416config CPU_SUBTYPE_SH7751R 417 bool "Support SH7751R processor" 418 select CPU_SH4 419 420config CPU_SUBTYPE_SH7760 421 bool "Support SH7760 processor" 422 select CPU_SH4 423 424config CPU_SUBTYPE_SH4_202 425 bool "Support SH4-202 processor" 426 select CPU_SH4 427 428# SH-4A Processor Support 429 430config CPU_SUBTYPE_SH7723 431 bool "Support SH7723 processor" 432 select CPU_SH4A 433 select CPU_SHX2 434 select ARCH_SHMOBILE 435 select ARCH_SPARSEMEM_ENABLE 436 select SYS_SUPPORTS_SH_CMT 437 select PINCTRL 438 help 439 Select SH7723 if you have an SH-MobileR2 CPU. 440 441config CPU_SUBTYPE_SH7724 442 bool "Support SH7724 processor" 443 select CPU_SH4A 444 select CPU_SHX2 445 select ARCH_SHMOBILE 446 select ARCH_SPARSEMEM_ENABLE 447 select SYS_SUPPORTS_SH_CMT 448 select PINCTRL 449 help 450 Select SH7724 if you have an SH-MobileR2R CPU. 451 452config CPU_SUBTYPE_SH7734 453 bool "Support SH7734 processor" 454 select CPU_SH4A 455 select CPU_SHX2 456 select PINCTRL 457 help 458 Select SH7734 if you have a SH4A SH7734 CPU. 459 460config CPU_SUBTYPE_SH7757 461 bool "Support SH7757 processor" 462 select CPU_SH4A 463 select CPU_SHX2 464 select PINCTRL 465 help 466 Select SH7757 if you have a SH4A SH7757 CPU. 467 468config CPU_SUBTYPE_SH7763 469 bool "Support SH7763 processor" 470 select CPU_SH4A 471 select USB_OHCI_SH if USB_OHCI_HCD 472 help 473 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 474 475config CPU_SUBTYPE_SH7770 476 bool "Support SH7770 processor" 477 select CPU_SH4A 478 479config CPU_SUBTYPE_SH7780 480 bool "Support SH7780 processor" 481 select CPU_SH4A 482 483config CPU_SUBTYPE_SH7785 484 bool "Support SH7785 processor" 485 select CPU_SH4A 486 select CPU_SHX2 487 select ARCH_SPARSEMEM_ENABLE 488 select SYS_SUPPORTS_NUMA 489 select PINCTRL 490 491config CPU_SUBTYPE_SH7786 492 bool "Support SH7786 processor" 493 select CPU_SH4A 494 select CPU_SHX3 495 select CPU_HAS_PTEAEX 496 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 497 select USB_OHCI_SH if USB_OHCI_HCD 498 select USB_EHCI_SH if USB_EHCI_HCD 499 select PINCTRL 500 501config CPU_SUBTYPE_SHX3 502 bool "Support SH-X3 processor" 503 select CPU_SH4A 504 select CPU_SHX3 505 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 506 select GPIOLIB 507 select PINCTRL 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_SH_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_SH_CMT 525 select PINCTRL 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_SH_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_PCLK_FREQ 568 int "Peripheral clock frequency (in Hz)" 569 depends on SH_CLK_CPG_LEGACY 570 default "31250000" if CPU_SUBTYPE_SH7619 571 default "33333333" if CPU_SUBTYPE_SH7770 || \ 572 CPU_SUBTYPE_SH7760 || \ 573 CPU_SUBTYPE_SH7705 || \ 574 CPU_SUBTYPE_SH7203 || \ 575 CPU_SUBTYPE_SH7206 || \ 576 CPU_SUBTYPE_SH7263 || \ 577 CPU_SUBTYPE_MXG 578 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 579 default "66000000" if CPU_SUBTYPE_SH4_202 580 default "50000000" 581 help 582 This option is used to specify the peripheral clock frequency. 583 This is necessary for determining the reference clock value on 584 platforms lacking an RTC. 585 586config SH_CLK_CPG 587 def_bool y 588 589config SH_CLK_CPG_LEGACY 590 depends on SH_CLK_CPG 591 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 592 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 593 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 594 !CPU_SUBTYPE_SH7269 595 596endmenu 597 598menu "CPU Frequency scaling" 599source "drivers/cpufreq/Kconfig" 600endmenu 601 602source "arch/sh/drivers/Kconfig" 603 604endmenu 605 606menu "Kernel features" 607 608source kernel/Kconfig.hz 609 610config KEXEC 611 bool "kexec system call (EXPERIMENTAL)" 612 depends on SUPERH32 && MMU 613 select KEXEC_CORE 614 help 615 kexec is a system call that implements the ability to shutdown your 616 current kernel, and to start another kernel. It is like a reboot 617 but it is independent of the system firmware. And like a reboot 618 you can start any kernel with it, not just Linux. 619 620 The name comes from the similarity to the exec system call. 621 622 It is an ongoing process to be certain the hardware in a machine 623 is properly shutdown, so do not be surprised if this code does not 624 initially work for you. As of this writing the exact hardware 625 interface is strongly in flux, so no good recommendation can be 626 made. 627 628config CRASH_DUMP 629 bool "kernel crash dumps (EXPERIMENTAL)" 630 depends on SUPERH32 && BROKEN_ON_SMP 631 help 632 Generate crash dump after being started by kexec. 633 This should be normally only set in special crash dump kernels 634 which are loaded in the main kernel with kexec-tools into 635 a specially reserved region and then later executed after 636 a crash by kdump/kexec. The crash dump kernel must be compiled 637 to a memory address not used by the main kernel using 638 PHYSICAL_START. 639 640 For more details see Documentation/kdump/kdump.txt 641 642config KEXEC_JUMP 643 bool "kexec jump (EXPERIMENTAL)" 644 depends on SUPERH32 && KEXEC && HIBERNATION 645 help 646 Jump between original kernel and kexeced kernel and invoke 647 code via KEXEC 648 649config PHYSICAL_START 650 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 651 default MEMORY_START 652 ---help--- 653 This gives the physical address where the kernel is loaded 654 and is ordinarily the same as MEMORY_START. 655 656 Different values are primarily used in the case of kexec on panic 657 where the fail safe kernel needs to run at a different address 658 than the panic-ed kernel. 659 660config SECCOMP 661 bool "Enable seccomp to safely compute untrusted bytecode" 662 depends on PROC_FS 663 help 664 This kernel feature is useful for number crunching applications 665 that may need to compute untrusted bytecode during their 666 execution. By using pipes or other transports made available to 667 the process as file descriptors supporting the read/write 668 syscalls, it's possible to isolate those applications in 669 their own address space using seccomp. Once seccomp is 670 enabled via prctl, it cannot be disabled and the task is only 671 allowed to execute a few safe syscalls defined by each seccomp 672 mode. 673 674 If unsure, say N. 675 676config SMP 677 bool "Symmetric multi-processing support" 678 depends on SYS_SUPPORTS_SMP 679 ---help--- 680 This enables support for systems with more than one CPU. If you have 681 a system with only one CPU, say N. If you have a system with more 682 than one CPU, say Y. 683 684 If you say N here, the kernel will run on uni- and multiprocessor 685 machines, but will use only one CPU of a multiprocessor machine. If 686 you say Y here, the kernel will run on many, but not all, 687 uniprocessor machines. On a uniprocessor machine, the kernel 688 will run faster if you say N here. 689 690 People using multiprocessor machines who say Y here should also say 691 Y to "Enhanced Real Time Clock Support", below. 692 693 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 694 available at <http://www.tldp.org/docs.html#howto>. 695 696 If you don't know what to do here, say N. 697 698config NR_CPUS 699 int "Maximum number of CPUs (2-32)" 700 range 2 32 701 depends on SMP 702 default "4" if CPU_SUBTYPE_SHX3 703 default "2" 704 help 705 This allows you to specify the maximum number of CPUs which this 706 kernel will support. The maximum supported value is 32 and the 707 minimum value which makes sense is 2. 708 709 This is purely to save memory - each supported CPU adds 710 approximately eight kilobytes to the kernel image. 711 712config HOTPLUG_CPU 713 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 714 depends on SMP 715 help 716 Say Y here to experiment with turning CPUs off and on. CPUs 717 can be controlled through /sys/devices/system/cpu. 718 719source "kernel/Kconfig.preempt" 720 721config GUSA 722 def_bool y 723 depends on !SMP && SUPERH32 724 help 725 This enables support for gUSA (general UserSpace Atomicity). 726 This is the default implementation for both UP and non-ll/sc 727 CPUs, and is used by the libc, amongst others. 728 729 For additional information, design information can be found 730 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 731 732 This should only be disabled for special cases where alternate 733 atomicity implementations exist. 734 735config GUSA_RB 736 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 737 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 738 help 739 Enabling this option will allow the kernel to implement some 740 atomic operations using a software implementation of load-locked/ 741 store-conditional (LLSC). On machines which do not have hardware 742 LLSC, this should be more efficient than the other alternative of 743 disabling interrupts around the atomic sequence. 744 745config HW_PERF_EVENTS 746 bool "Enable hardware performance counter support for perf events" 747 depends on PERF_EVENTS && CPU_HAS_PMU 748 default y 749 help 750 Enable hardware performance counter support for perf events. If 751 disabled, perf events will use software events only. 752 753source "drivers/sh/Kconfig" 754 755endmenu 756 757menu "Boot options" 758 759config USE_BUILTIN_DTB 760 bool "Use builtin DTB" 761 default n 762 depends on SH_DEVICE_TREE 763 help 764 Link a device tree blob for particular hardware into the kernel, 765 suppressing use of the DTB pointer provided by the bootloader. 766 This option should only be used with legacy bootloaders that are 767 not capable of providing a DTB to the kernel, or for experimental 768 hardware without stable device tree bindings. 769 770config BUILTIN_DTB_SOURCE 771 string "Source file for builtin DTB" 772 default "" 773 depends on USE_BUILTIN_DTB 774 help 775 Base name (without suffix, relative to arch/sh/boot/dts) for the 776 a DTS file that will be used to produce the DTB linked into the 777 kernel. 778 779config ZERO_PAGE_OFFSET 780 hex 781 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 782 SH_7751_SOLUTION_ENGINE 783 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 784 default "0x00002000" if PAGE_SIZE_8KB 785 default "0x00001000" 786 help 787 This sets the default offset of zero page. 788 789config BOOT_LINK_OFFSET 790 hex 791 default "0x00210000" if SH_SHMIN 792 default "0x00400000" if SH_CAYMAN 793 default "0x00810000" if SH_7780_SOLUTION_ENGINE 794 default "0x009e0000" if SH_TITAN 795 default "0x01800000" if SH_SDK7780 796 default "0x02000000" if SH_EDOSK7760 797 default "0x00800000" 798 help 799 This option allows you to set the link address offset of the zImage. 800 This can be useful if you are on a board which has a small amount of 801 memory. 802 803config ENTRY_OFFSET 804 hex 805 default "0x00001000" if PAGE_SIZE_4KB 806 default "0x00002000" if PAGE_SIZE_8KB 807 default "0x00004000" if PAGE_SIZE_16KB 808 default "0x00010000" if PAGE_SIZE_64KB 809 default "0x00000000" 810 811config ROMIMAGE_MMCIF 812 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 813 depends on CPU_SUBTYPE_SH7724 814 help 815 Say Y here to include experimental MMCIF loading code in 816 romImage. With this enabled it is possible to write the romImage 817 kernel image to an MMC card and boot the kernel straight from 818 the reset vector. At reset the processor Mask ROM will load the 819 first part of the romImage which in turn loads the rest the kernel 820 image to RAM using the MMCIF hardware block. 821 822choice 823 prompt "Kernel command line" 824 optional 825 default CMDLINE_OVERWRITE 826 help 827 Setting this option allows the kernel command line arguments 828 to be set. 829 830config CMDLINE_OVERWRITE 831 bool "Overwrite bootloader kernel arguments" 832 help 833 Given string will overwrite any arguments passed in by 834 a bootloader. 835 836config CMDLINE_EXTEND 837 bool "Extend bootloader kernel arguments" 838 help 839 Given string will be concatenated with arguments passed in 840 by a bootloader. 841 842endchoice 843 844config CMDLINE 845 string "Kernel command line arguments string" 846 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 847 default "console=ttySC1,115200" 848 849endmenu 850 851menu "Bus options" 852 853config SUPERHYWAY 854 tristate "SuperHyway Bus support" 855 depends on CPU_SUBTYPE_SH4_202 856 857config MAPLE 858 bool "Maple Bus support" 859 depends on SH_DREAMCAST 860 help 861 The Maple Bus is SEGA's serial communication bus for peripherals 862 on the Dreamcast. Without this bus support you won't be able to 863 get your Dreamcast keyboard etc to work, so most users 864 probably want to say 'Y' here, unless you are only using the 865 Dreamcast with a serial line terminal or a remote network 866 connection. 867 868config PCI 869 bool "PCI support" 870 depends on SYS_SUPPORTS_PCI 871 select PCI_DOMAINS 872 select GENERIC_PCI_IOMAP 873 select NO_GENERIC_PCI_IOPORT_MAP 874 help 875 Find out whether you have a PCI motherboard. PCI is the name of a 876 bus system, i.e. the way the CPU talks to the other stuff inside 877 your box. If you have PCI, say Y, otherwise N. 878 879config PCI_DOMAINS 880 bool 881 882source "drivers/pci/Kconfig" 883 884source "drivers/pcmcia/Kconfig" 885 886endmenu 887 888menu "Executable file formats" 889 890source "fs/Kconfig.binfmt" 891 892endmenu 893 894menu "Power management options (EXPERIMENTAL)" 895 896source "kernel/power/Kconfig" 897 898source "drivers/cpuidle/Kconfig" 899 900endmenu 901 902source "net/Kconfig" 903 904source "drivers/Kconfig" 905 906source "fs/Kconfig" 907 908source "arch/sh/Kconfig.debug" 909 910source "security/Kconfig" 911 912source "crypto/Kconfig" 913 914source "lib/Kconfig" 915