1# SPDX-License-Identifier: GPL-2.0 2config SUPERH 3 def_bool y 4 select ARCH_HAS_PTE_SPECIAL 5 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 6 select ARCH_MIGHT_HAVE_PC_PARPORT 7 select ARCH_NO_COHERENT_DMA_MMAP if !MMU 8 select HAVE_PATA_PLATFORM 9 select CLKDEV_LOOKUP 10 select DMA_DIRECT_OPS 11 select HAVE_IDE if HAS_IOPORT_MAP 12 select HAVE_MEMBLOCK 13 select HAVE_MEMBLOCK_NODE_MAP 14 select NO_BOOTMEM 15 select ARCH_DISCARD_MEMBLOCK 16 select HAVE_OPROFILE 17 select HAVE_GENERIC_DMA_COHERENT 18 select HAVE_ARCH_TRACEHOOK 19 select HAVE_PERF_EVENTS 20 select HAVE_DEBUG_BUGVERBOSE 21 select ARCH_HAVE_CUSTOM_GPIO_H 22 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 23 select ARCH_HAS_GCOV_PROFILE_ALL 24 select PERF_USE_VMALLOC 25 select HAVE_DEBUG_KMEMLEAK 26 select HAVE_KERNEL_GZIP 27 select CPU_NO_EFFICIENT_FFS 28 select HAVE_KERNEL_BZIP2 29 select HAVE_KERNEL_LZMA 30 select HAVE_KERNEL_XZ 31 select HAVE_KERNEL_LZO 32 select HAVE_UID16 33 select ARCH_WANT_IPC_PARSE_VERSION 34 select HAVE_SYSCALL_TRACEPOINTS 35 select HAVE_REGS_AND_STACK_ACCESS_API 36 select MAY_HAVE_SPARSE_IRQ 37 select IRQ_FORCED_THREADING 38 select RTC_LIB 39 select GENERIC_ATOMIC64 40 select GENERIC_IRQ_SHOW 41 select GENERIC_SMP_IDLE_THREAD 42 select GENERIC_IDLE_POLL_SETUP 43 select GENERIC_CLOCKEVENTS 44 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 45 select GENERIC_SCHED_CLOCK 46 select GENERIC_STRNCPY_FROM_USER 47 select GENERIC_STRNLEN_USER 48 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 49 select MODULES_USE_ELF_RELA 50 select OLD_SIGSUSPEND 51 select OLD_SIGACTION 52 select HAVE_ARCH_AUDITSYSCALL 53 select HAVE_FUTEX_CMPXCHG if FUTEX 54 select HAVE_NMI 55 select NEED_SG_DMA_LENGTH 56 57 help 58 The SuperH is a RISC processor targeted for use in embedded systems 59 and consumer electronics; it was also used in the Sega Dreamcast 60 gaming console. The SuperH port has a home page at 61 <http://www.linux-sh.org/>. 62 63config SUPERH32 64 def_bool "$(ARCH)" = "sh" 65 select HAVE_KPROBES 66 select HAVE_KRETPROBES 67 select HAVE_IOREMAP_PROT if MMU && !X2TLB 68 select HAVE_FUNCTION_TRACER 69 select HAVE_FTRACE_MCOUNT_RECORD 70 select HAVE_DYNAMIC_FTRACE 71 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 72 select ARCH_WANT_IPC_PARSE_VERSION 73 select HAVE_FUNCTION_GRAPH_TRACER 74 select HAVE_ARCH_KGDB 75 select HAVE_HW_BREAKPOINT 76 select HAVE_MIXED_BREAKPOINTS_REGS 77 select PERF_EVENTS 78 select ARCH_HIBERNATION_POSSIBLE if MMU 79 select SPARSE_IRQ 80 select HAVE_STACKPROTECTOR 81 82config SUPERH64 83 def_bool "$(ARCH)" = "sh64" 84 select HAVE_EXIT_THREAD 85 select KALLSYMS 86 87config ARCH_DEFCONFIG 88 string 89 default "arch/sh/configs/shx3_defconfig" if SUPERH32 90 default "arch/sh/configs/cayman_defconfig" if SUPERH64 91 92config RWSEM_GENERIC_SPINLOCK 93 def_bool y 94 95config RWSEM_XCHGADD_ALGORITHM 96 bool 97 98config GENERIC_BUG 99 def_bool y 100 depends on BUG && SUPERH32 101 102config GENERIC_CSUM 103 def_bool y 104 depends on SUPERH64 105 106config GENERIC_HWEIGHT 107 def_bool y 108 109config GENERIC_CALIBRATE_DELAY 110 bool 111 112config GENERIC_LOCKBREAK 113 def_bool y 114 depends on SMP && PREEMPT 115 116config ARCH_SUSPEND_POSSIBLE 117 def_bool n 118 119config ARCH_HIBERNATION_POSSIBLE 120 def_bool n 121 122config SYS_SUPPORTS_APM_EMULATION 123 bool 124 select ARCH_SUSPEND_POSSIBLE 125 126config SYS_SUPPORTS_HUGETLBFS 127 bool 128 129config SYS_SUPPORTS_SMP 130 bool 131 132config SYS_SUPPORTS_NUMA 133 bool 134 135config SYS_SUPPORTS_PCI 136 bool 137 138config STACKTRACE_SUPPORT 139 def_bool y 140 141config LOCKDEP_SUPPORT 142 def_bool y 143 144config ARCH_HAS_ILOG2_U32 145 def_bool n 146 147config ARCH_HAS_ILOG2_U64 148 def_bool n 149 150config NO_IOPORT_MAP 151 def_bool !PCI 152 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 153 !SH_HP6XX && !SH_SOLUTION_ENGINE 154 155config IO_TRAPPED 156 bool 157 158config SWAP_IO_SPACE 159 bool 160 161config DMA_COHERENT 162 bool 163 164config DMA_NONCOHERENT 165 def_bool !DMA_COHERENT 166 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 167 168config PGTABLE_LEVELS 169 default 3 if X2TLB 170 default 2 171 172menu "System type" 173 174# 175# Processor families 176# 177config CPU_SH2 178 bool 179 select SH_INTC 180 181config CPU_SH2A 182 bool 183 select CPU_SH2 184 select UNCACHED_MAPPING 185 186config CPU_J2 187 bool 188 select CPU_SH2 189 select OF 190 select OF_EARLY_FLATTREE 191 192config CPU_SH3 193 bool 194 select CPU_HAS_INTEVT 195 select CPU_HAS_SR_RB 196 select SH_INTC 197 select SYS_SUPPORTS_SH_TMU 198 199config CPU_SH4 200 bool 201 select CPU_HAS_INTEVT 202 select CPU_HAS_SR_RB 203 select CPU_HAS_FPU if !CPU_SH4AL_DSP 204 select SH_INTC 205 select SYS_SUPPORTS_SH_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_SH_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 237config CPU_HAS_PMU 238 depends on CPU_SH4 || CPU_SH4A 239 default y 240 bool 241 242if SUPERH32 243 244choice 245 prompt "Processor sub-type selection" 246 247# 248# Processor subtypes 249# 250 251# SH-2 Processor Support 252 253config CPU_SUBTYPE_SH7619 254 bool "Support SH7619 processor" 255 select CPU_SH2 256 select SYS_SUPPORTS_SH_CMT 257 258config CPU_SUBTYPE_J2 259 bool "Support J2 processor" 260 select CPU_J2 261 select SYS_SUPPORTS_SMP 262 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 263 264# SH-2A Processor Support 265 266config CPU_SUBTYPE_SH7201 267 bool "Support SH7201 processor" 268 select CPU_SH2A 269 select CPU_HAS_FPU 270 select SYS_SUPPORTS_SH_MTU2 271 272config CPU_SUBTYPE_SH7203 273 bool "Support SH7203 processor" 274 select CPU_SH2A 275 select CPU_HAS_FPU 276 select SYS_SUPPORTS_SH_CMT 277 select SYS_SUPPORTS_SH_MTU2 278 select PINCTRL 279 280config CPU_SUBTYPE_SH7206 281 bool "Support SH7206 processor" 282 select CPU_SH2A 283 select SYS_SUPPORTS_SH_CMT 284 select SYS_SUPPORTS_SH_MTU2 285 286config CPU_SUBTYPE_SH7263 287 bool "Support SH7263 processor" 288 select CPU_SH2A 289 select CPU_HAS_FPU 290 select SYS_SUPPORTS_SH_CMT 291 select SYS_SUPPORTS_SH_MTU2 292 293config CPU_SUBTYPE_SH7264 294 bool "Support SH7264 processor" 295 select CPU_SH2A 296 select CPU_HAS_FPU 297 select SYS_SUPPORTS_SH_CMT 298 select SYS_SUPPORTS_SH_MTU2 299 select PINCTRL 300 301config CPU_SUBTYPE_SH7269 302 bool "Support SH7269 processor" 303 select CPU_SH2A 304 select CPU_HAS_FPU 305 select SYS_SUPPORTS_SH_CMT 306 select SYS_SUPPORTS_SH_MTU2 307 select PINCTRL 308 309config CPU_SUBTYPE_MXG 310 bool "Support MX-G processor" 311 select CPU_SH2A 312 select SYS_SUPPORTS_SH_MTU2 313 help 314 Select MX-G if running on an R8A03022BG part. 315 316# SH-3 Processor Support 317 318config CPU_SUBTYPE_SH7705 319 bool "Support SH7705 processor" 320 select CPU_SH3 321 322config CPU_SUBTYPE_SH7706 323 bool "Support SH7706 processor" 324 select CPU_SH3 325 help 326 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 327 328config CPU_SUBTYPE_SH7707 329 bool "Support SH7707 processor" 330 select CPU_SH3 331 help 332 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 333 334config CPU_SUBTYPE_SH7708 335 bool "Support SH7708 processor" 336 select CPU_SH3 337 help 338 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 339 if you have a 100 Mhz SH-3 HD6417708R CPU. 340 341config CPU_SUBTYPE_SH7709 342 bool "Support SH7709 processor" 343 select CPU_SH3 344 help 345 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 346 347config CPU_SUBTYPE_SH7710 348 bool "Support SH7710 processor" 349 select CPU_SH3 350 select CPU_HAS_DSP 351 help 352 Select SH7710 if you have a SH3-DSP SH7710 CPU. 353 354config CPU_SUBTYPE_SH7712 355 bool "Support SH7712 processor" 356 select CPU_SH3 357 select CPU_HAS_DSP 358 help 359 Select SH7712 if you have a SH3-DSP SH7712 CPU. 360 361config CPU_SUBTYPE_SH7720 362 bool "Support SH7720 processor" 363 select CPU_SH3 364 select CPU_HAS_DSP 365 select SYS_SUPPORTS_SH_CMT 366 select USB_OHCI_SH if USB_OHCI_HCD 367 select PINCTRL 368 help 369 Select SH7720 if you have a SH3-DSP SH7720 CPU. 370 371config CPU_SUBTYPE_SH7721 372 bool "Support SH7721 processor" 373 select CPU_SH3 374 select CPU_HAS_DSP 375 select SYS_SUPPORTS_SH_CMT 376 select USB_OHCI_SH if USB_OHCI_HCD 377 help 378 Select SH7721 if you have a SH3-DSP SH7721 CPU. 379 380# SH-4 Processor Support 381 382config CPU_SUBTYPE_SH7750 383 bool "Support SH7750 processor" 384 select CPU_SH4 385 help 386 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 387 388config CPU_SUBTYPE_SH7091 389 bool "Support SH7091 processor" 390 select CPU_SH4 391 help 392 Select SH7091 if you have an SH-4 based Sega device (such as 393 the Dreamcast, Naomi, and Naomi 2). 394 395config CPU_SUBTYPE_SH7750R 396 bool "Support SH7750R processor" 397 select CPU_SH4 398 399config CPU_SUBTYPE_SH7750S 400 bool "Support SH7750S processor" 401 select CPU_SH4 402 403config CPU_SUBTYPE_SH7751 404 bool "Support SH7751 processor" 405 select CPU_SH4 406 help 407 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 408 or if you have a HD6417751R CPU. 409 410config CPU_SUBTYPE_SH7751R 411 bool "Support SH7751R processor" 412 select CPU_SH4 413 414config CPU_SUBTYPE_SH7760 415 bool "Support SH7760 processor" 416 select CPU_SH4 417 418config CPU_SUBTYPE_SH4_202 419 bool "Support SH4-202 processor" 420 select CPU_SH4 421 422# SH-4A Processor Support 423 424config CPU_SUBTYPE_SH7723 425 bool "Support SH7723 processor" 426 select CPU_SH4A 427 select CPU_SHX2 428 select ARCH_SHMOBILE 429 select ARCH_SPARSEMEM_ENABLE 430 select SYS_SUPPORTS_SH_CMT 431 select PINCTRL 432 help 433 Select SH7723 if you have an SH-MobileR2 CPU. 434 435config CPU_SUBTYPE_SH7724 436 bool "Support SH7724 processor" 437 select CPU_SH4A 438 select CPU_SHX2 439 select ARCH_SHMOBILE 440 select ARCH_SPARSEMEM_ENABLE 441 select SYS_SUPPORTS_SH_CMT 442 select PINCTRL 443 help 444 Select SH7724 if you have an SH-MobileR2R CPU. 445 446config CPU_SUBTYPE_SH7734 447 bool "Support SH7734 processor" 448 select CPU_SH4A 449 select CPU_SHX2 450 select PINCTRL 451 help 452 Select SH7734 if you have a SH4A SH7734 CPU. 453 454config CPU_SUBTYPE_SH7757 455 bool "Support SH7757 processor" 456 select CPU_SH4A 457 select CPU_SHX2 458 select PINCTRL 459 help 460 Select SH7757 if you have a SH4A SH7757 CPU. 461 462config CPU_SUBTYPE_SH7763 463 bool "Support SH7763 processor" 464 select CPU_SH4A 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 PINCTRL 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 USB_OHCI_SH if USB_OHCI_HCD 492 select USB_EHCI_SH if USB_EHCI_HCD 493 select PINCTRL 494 495config CPU_SUBTYPE_SHX3 496 bool "Support SH-X3 processor" 497 select CPU_SH4A 498 select CPU_SHX3 499 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 500 select GPIOLIB 501 select PINCTRL 502 503# SH4AL-DSP Processor Support 504 505config CPU_SUBTYPE_SH7343 506 bool "Support SH7343 processor" 507 select CPU_SH4AL_DSP 508 select ARCH_SHMOBILE 509 select SYS_SUPPORTS_SH_CMT 510 511config CPU_SUBTYPE_SH7722 512 bool "Support SH7722 processor" 513 select CPU_SH4AL_DSP 514 select CPU_SHX2 515 select ARCH_SHMOBILE 516 select ARCH_SPARSEMEM_ENABLE 517 select SYS_SUPPORTS_NUMA 518 select SYS_SUPPORTS_SH_CMT 519 select PINCTRL 520 521config CPU_SUBTYPE_SH7366 522 bool "Support SH7366 processor" 523 select CPU_SH4AL_DSP 524 select CPU_SHX2 525 select ARCH_SHMOBILE 526 select ARCH_SPARSEMEM_ENABLE 527 select SYS_SUPPORTS_NUMA 528 select SYS_SUPPORTS_SH_CMT 529 530endchoice 531 532endif 533 534if SUPERH64 535 536choice 537 prompt "Processor sub-type selection" 538 539# SH-5 Processor Support 540 541config CPU_SUBTYPE_SH5_101 542 bool "Support SH5-101 processor" 543 select CPU_SH5 544 545config CPU_SUBTYPE_SH5_103 546 bool "Support SH5-103 processor" 547 select CPU_SH5 548 549endchoice 550 551endif 552 553source "arch/sh/mm/Kconfig" 554 555source "arch/sh/Kconfig.cpu" 556 557source "arch/sh/boards/Kconfig" 558 559menu "Timer and clock configuration" 560 561config SH_PCLK_FREQ 562 int "Peripheral clock frequency (in Hz)" 563 depends on SH_CLK_CPG_LEGACY 564 default "31250000" if CPU_SUBTYPE_SH7619 565 default "33333333" if CPU_SUBTYPE_SH7770 || \ 566 CPU_SUBTYPE_SH7760 || \ 567 CPU_SUBTYPE_SH7705 || \ 568 CPU_SUBTYPE_SH7203 || \ 569 CPU_SUBTYPE_SH7206 || \ 570 CPU_SUBTYPE_SH7263 || \ 571 CPU_SUBTYPE_MXG 572 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 573 default "66000000" if CPU_SUBTYPE_SH4_202 574 default "50000000" 575 help 576 This option is used to specify the peripheral clock frequency. 577 This is necessary for determining the reference clock value on 578 platforms lacking an RTC. 579 580config SH_CLK_CPG 581 def_bool y 582 583config SH_CLK_CPG_LEGACY 584 depends on SH_CLK_CPG 585 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 586 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 587 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 588 !CPU_SUBTYPE_SH7269 589 590endmenu 591 592menu "CPU Frequency scaling" 593source "drivers/cpufreq/Kconfig" 594endmenu 595 596source "arch/sh/drivers/Kconfig" 597 598endmenu 599 600menu "Kernel features" 601 602source kernel/Kconfig.hz 603 604config KEXEC 605 bool "kexec system call (EXPERIMENTAL)" 606 depends on SUPERH32 && MMU 607 select KEXEC_CORE 608 help 609 kexec is a system call that implements the ability to shutdown your 610 current kernel, and to start another kernel. It is like a reboot 611 but it is independent of the system firmware. And like a reboot 612 you can start any kernel with it, not just Linux. 613 614 The name comes from the similarity to the exec system call. 615 616 It is an ongoing process to be certain the hardware in a machine 617 is properly shutdown, so do not be surprised if this code does not 618 initially work for you. As of this writing the exact hardware 619 interface is strongly in flux, so no good recommendation can be 620 made. 621 622config CRASH_DUMP 623 bool "kernel crash dumps (EXPERIMENTAL)" 624 depends on SUPERH32 && BROKEN_ON_SMP 625 help 626 Generate crash dump after being started by kexec. 627 This should be normally only set in special crash dump kernels 628 which are loaded in the main kernel with kexec-tools into 629 a specially reserved region and then later executed after 630 a crash by kdump/kexec. The crash dump kernel must be compiled 631 to a memory address not used by the main kernel using 632 PHYSICAL_START. 633 634 For more details see Documentation/kdump/kdump.txt 635 636config KEXEC_JUMP 637 bool "kexec jump (EXPERIMENTAL)" 638 depends on SUPERH32 && KEXEC && HIBERNATION 639 help 640 Jump between original kernel and kexeced kernel and invoke 641 code via KEXEC 642 643config PHYSICAL_START 644 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 645 default MEMORY_START 646 ---help--- 647 This gives the physical address where the kernel is loaded 648 and is ordinarily the same as MEMORY_START. 649 650 Different values are primarily used in the case of kexec on panic 651 where the fail safe kernel needs to run at a different address 652 than the panic-ed kernel. 653 654config SECCOMP 655 bool "Enable seccomp to safely compute untrusted bytecode" 656 depends on PROC_FS 657 help 658 This kernel feature is useful for number crunching applications 659 that may need to compute untrusted bytecode during their 660 execution. By using pipes or other transports made available to 661 the process as file descriptors supporting the read/write 662 syscalls, it's possible to isolate those applications in 663 their own address space using seccomp. Once seccomp is 664 enabled via prctl, it cannot be disabled and the task is only 665 allowed to execute a few safe syscalls defined by each seccomp 666 mode. 667 668 If unsure, say N. 669 670config SMP 671 bool "Symmetric multi-processing support" 672 depends on SYS_SUPPORTS_SMP 673 ---help--- 674 This enables support for systems with more than one CPU. If you have 675 a system with only one CPU, say N. If you have a system with more 676 than one CPU, say Y. 677 678 If you say N here, the kernel will run on uni- and multiprocessor 679 machines, but will use only one CPU of a multiprocessor machine. If 680 you say Y here, the kernel will run on many, but not all, 681 uniprocessor machines. On a uniprocessor machine, the kernel 682 will run faster if you say N here. 683 684 People using multiprocessor machines who say Y here should also say 685 Y to "Enhanced Real Time Clock Support", below. 686 687 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO 688 available at <http://www.tldp.org/docs.html#howto>. 689 690 If you don't know what to do here, say N. 691 692config NR_CPUS 693 int "Maximum number of CPUs (2-32)" 694 range 2 32 695 depends on SMP 696 default "4" if CPU_SUBTYPE_SHX3 697 default "2" 698 help 699 This allows you to specify the maximum number of CPUs which this 700 kernel will support. The maximum supported value is 32 and the 701 minimum value which makes sense is 2. 702 703 This is purely to save memory - each supported CPU adds 704 approximately eight kilobytes to the kernel image. 705 706config HOTPLUG_CPU 707 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 708 depends on SMP 709 help 710 Say Y here to experiment with turning CPUs off and on. CPUs 711 can be controlled through /sys/devices/system/cpu. 712 713config GUSA 714 def_bool y 715 depends on !SMP && SUPERH32 716 help 717 This enables support for gUSA (general UserSpace Atomicity). 718 This is the default implementation for both UP and non-ll/sc 719 CPUs, and is used by the libc, amongst others. 720 721 For additional information, design information can be found 722 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 723 724 This should only be disabled for special cases where alternate 725 atomicity implementations exist. 726 727config GUSA_RB 728 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 729 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 730 help 731 Enabling this option will allow the kernel to implement some 732 atomic operations using a software implementation of load-locked/ 733 store-conditional (LLSC). On machines which do not have hardware 734 LLSC, this should be more efficient than the other alternative of 735 disabling interrupts around the atomic sequence. 736 737config HW_PERF_EVENTS 738 bool "Enable hardware performance counter support for perf events" 739 depends on PERF_EVENTS && CPU_HAS_PMU 740 default y 741 help 742 Enable hardware performance counter support for perf events. If 743 disabled, perf events will use software events only. 744 745source "drivers/sh/Kconfig" 746 747endmenu 748 749menu "Boot options" 750 751config USE_BUILTIN_DTB 752 bool "Use builtin DTB" 753 default n 754 depends on SH_DEVICE_TREE 755 help 756 Link a device tree blob for particular hardware into the kernel, 757 suppressing use of the DTB pointer provided by the bootloader. 758 This option should only be used with legacy bootloaders that are 759 not capable of providing a DTB to the kernel, or for experimental 760 hardware without stable device tree bindings. 761 762config BUILTIN_DTB_SOURCE 763 string "Source file for builtin DTB" 764 default "" 765 depends on USE_BUILTIN_DTB 766 help 767 Base name (without suffix, relative to arch/sh/boot/dts) for the 768 a DTS file that will be used to produce the DTB linked into the 769 kernel. 770 771config ZERO_PAGE_OFFSET 772 hex 773 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 774 SH_7751_SOLUTION_ENGINE 775 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 776 default "0x00002000" if PAGE_SIZE_8KB 777 default "0x00001000" 778 help 779 This sets the default offset of zero page. 780 781config BOOT_LINK_OFFSET 782 hex 783 default "0x00210000" if SH_SHMIN 784 default "0x00400000" if SH_CAYMAN 785 default "0x00810000" if SH_7780_SOLUTION_ENGINE 786 default "0x009e0000" if SH_TITAN 787 default "0x01800000" if SH_SDK7780 788 default "0x02000000" if SH_EDOSK7760 789 default "0x00800000" 790 help 791 This option allows you to set the link address offset of the zImage. 792 This can be useful if you are on a board which has a small amount of 793 memory. 794 795config ENTRY_OFFSET 796 hex 797 default "0x00001000" if PAGE_SIZE_4KB 798 default "0x00002000" if PAGE_SIZE_8KB 799 default "0x00004000" if PAGE_SIZE_16KB 800 default "0x00010000" if PAGE_SIZE_64KB 801 default "0x00000000" 802 803config ROMIMAGE_MMCIF 804 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 805 depends on CPU_SUBTYPE_SH7724 806 help 807 Say Y here to include experimental MMCIF loading code in 808 romImage. With this enabled it is possible to write the romImage 809 kernel image to an MMC card and boot the kernel straight from 810 the reset vector. At reset the processor Mask ROM will load the 811 first part of the romImage which in turn loads the rest the kernel 812 image to RAM using the MMCIF hardware block. 813 814choice 815 prompt "Kernel command line" 816 optional 817 default CMDLINE_OVERWRITE 818 help 819 Setting this option allows the kernel command line arguments 820 to be set. 821 822config CMDLINE_OVERWRITE 823 bool "Overwrite bootloader kernel arguments" 824 help 825 Given string will overwrite any arguments passed in by 826 a bootloader. 827 828config CMDLINE_EXTEND 829 bool "Extend bootloader kernel arguments" 830 help 831 Given string will be concatenated with arguments passed in 832 by a bootloader. 833 834endchoice 835 836config CMDLINE 837 string "Kernel command line arguments string" 838 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 839 default "console=ttySC1,115200" 840 841endmenu 842 843menu "Bus options" 844 845config SUPERHYWAY 846 tristate "SuperHyway Bus support" 847 depends on CPU_SUBTYPE_SH4_202 848 849config MAPLE 850 bool "Maple Bus support" 851 depends on SH_DREAMCAST 852 help 853 The Maple Bus is SEGA's serial communication bus for peripherals 854 on the Dreamcast. Without this bus support you won't be able to 855 get your Dreamcast keyboard etc to work, so most users 856 probably want to say 'Y' here, unless you are only using the 857 Dreamcast with a serial line terminal or a remote network 858 connection. 859 860config PCI 861 bool "PCI support" 862 depends on SYS_SUPPORTS_PCI 863 select PCI_DOMAINS 864 select GENERIC_PCI_IOMAP 865 select NO_GENERIC_PCI_IOPORT_MAP 866 help 867 Find out whether you have a PCI motherboard. PCI is the name of a 868 bus system, i.e. the way the CPU talks to the other stuff inside 869 your box. If you have PCI, say Y, otherwise N. 870 871config PCI_DOMAINS 872 bool 873 874source "drivers/pci/Kconfig" 875 876source "drivers/pcmcia/Kconfig" 877 878endmenu 879 880menu "Power management options (EXPERIMENTAL)" 881 882source "kernel/power/Kconfig" 883 884source "drivers/cpuidle/Kconfig" 885 886endmenu 887