1# SPDX-License-Identifier: GPL-2.0 2config SUPERH 3 def_bool y 4 select ARCH_HAS_BINFMT_FLAT if !MMU 5 select ARCH_HAS_PTE_SPECIAL 6 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 7 select ARCH_MIGHT_HAVE_PC_PARPORT 8 select ARCH_NO_COHERENT_DMA_MMAP if !MMU 9 select HAVE_PATA_PLATFORM 10 select CLKDEV_LOOKUP 11 select DMA_DECLARE_COHERENT 12 select HAVE_IDE if HAS_IOPORT_MAP 13 select HAVE_MEMBLOCK_NODE_MAP 14 select HAVE_OPROFILE 15 select HAVE_ARCH_TRACEHOOK 16 select HAVE_PERF_EVENTS 17 select HAVE_DEBUG_BUGVERBOSE 18 select HAVE_FAST_GUP if MMU 19 select ARCH_HAVE_CUSTOM_GPIO_H 20 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 21 select ARCH_HAS_GCOV_PROFILE_ALL 22 select PERF_USE_VMALLOC 23 select HAVE_DEBUG_KMEMLEAK 24 select HAVE_KERNEL_GZIP 25 select CPU_NO_EFFICIENT_FFS 26 select HAVE_KERNEL_BZIP2 27 select HAVE_KERNEL_LZMA 28 select HAVE_KERNEL_XZ 29 select HAVE_KERNEL_LZO 30 select HAVE_UID16 31 select ARCH_WANT_IPC_PARSE_VERSION 32 select HAVE_SYSCALL_TRACEPOINTS 33 select HAVE_REGS_AND_STACK_ACCESS_API 34 select MAY_HAVE_SPARSE_IRQ 35 select IRQ_FORCED_THREADING 36 select RTC_LIB 37 select GENERIC_ATOMIC64 38 select GENERIC_IRQ_SHOW 39 select GENERIC_SMP_IDLE_THREAD 40 select GENERIC_IDLE_POLL_SETUP 41 select GENERIC_CLOCKEVENTS 42 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 43 select GENERIC_PCI_IOMAP if PCI 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 NO_GENERIC_PCI_IOPORT_MAP if PCI 50 select OLD_SIGSUSPEND 51 select OLD_SIGACTION 52 select PCI_DOMAINS if PCI 53 select HAVE_ARCH_AUDITSYSCALL 54 select HAVE_FUTEX_CMPXCHG if FUTEX 55 select HAVE_NMI 56 select NEED_SG_DMA_LENGTH 57 select ARCH_HAS_GIGANTIC_PAGE 58 59 help 60 The SuperH is a RISC processor targeted for use in embedded systems 61 and consumer electronics; it was also used in the Sega Dreamcast 62 gaming console. The SuperH port has a home page at 63 <http://www.linux-sh.org/>. 64 65config SUPERH32 66 def_bool "$(ARCH)" = "sh" 67 select ARCH_32BIT_OFF_T 68 select GUP_GET_PTE_LOW_HIGH if X2TLB 69 select HAVE_KPROBES 70 select HAVE_KRETPROBES 71 select HAVE_IOREMAP_PROT if MMU && !X2TLB 72 select HAVE_FUNCTION_TRACER 73 select HAVE_FTRACE_MCOUNT_RECORD 74 select HAVE_DYNAMIC_FTRACE 75 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 76 select ARCH_WANT_IPC_PARSE_VERSION 77 select HAVE_FUNCTION_GRAPH_TRACER 78 select HAVE_ARCH_KGDB 79 select HAVE_HW_BREAKPOINT 80 select HAVE_MIXED_BREAKPOINTS_REGS 81 select PERF_EVENTS 82 select ARCH_HIBERNATION_POSSIBLE if MMU 83 select SPARSE_IRQ 84 select HAVE_STACKPROTECTOR 85 86config SUPERH64 87 def_bool "$(ARCH)" = "sh64" 88 select HAVE_EXIT_THREAD 89 select KALLSYMS 90 91config ARCH_DEFCONFIG 92 string 93 default "arch/sh/configs/shx3_defconfig" if SUPERH32 94 default "arch/sh/configs/cayman_defconfig" if SUPERH64 95 96config GENERIC_BUG 97 def_bool y 98 depends on BUG && SUPERH32 99 100config GENERIC_CSUM 101 def_bool y 102 depends on SUPERH64 103 104config GENERIC_HWEIGHT 105 def_bool y 106 107config GENERIC_CALIBRATE_DELAY 108 bool 109 110config GENERIC_LOCKBREAK 111 def_bool y 112 depends on SMP && PREEMPT 113 114config ARCH_SUSPEND_POSSIBLE 115 def_bool n 116 117config ARCH_HIBERNATION_POSSIBLE 118 def_bool n 119 120config SYS_SUPPORTS_APM_EMULATION 121 bool 122 select ARCH_SUSPEND_POSSIBLE 123 124config SYS_SUPPORTS_HUGETLBFS 125 bool 126 127config SYS_SUPPORTS_SMP 128 bool 129 130config SYS_SUPPORTS_NUMA 131 bool 132 133config STACKTRACE_SUPPORT 134 def_bool y 135 136config LOCKDEP_SUPPORT 137 def_bool y 138 139config ARCH_HAS_ILOG2_U32 140 def_bool n 141 142config ARCH_HAS_ILOG2_U64 143 def_bool n 144 145config NO_IOPORT_MAP 146 def_bool !PCI 147 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 148 !SH_HP6XX && !SH_SOLUTION_ENGINE 149 150config IO_TRAPPED 151 bool 152 153config SWAP_IO_SPACE 154 bool 155 156config DMA_COHERENT 157 bool 158 159config DMA_NONCOHERENT 160 def_bool !DMA_COHERENT 161 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 162 163config PGTABLE_LEVELS 164 default 3 if X2TLB 165 default 2 166 167menu "System type" 168 169# 170# Processor families 171# 172config CPU_SH2 173 bool 174 select SH_INTC 175 176config CPU_SH2A 177 bool 178 select CPU_SH2 179 select UNCACHED_MAPPING 180 181config CPU_J2 182 bool 183 select CPU_SH2 184 select OF 185 select OF_EARLY_FLATTREE 186 187config CPU_SH3 188 bool 189 select CPU_HAS_INTEVT 190 select CPU_HAS_SR_RB 191 select SH_INTC 192 select SYS_SUPPORTS_SH_TMU 193 194config CPU_SH4 195 bool 196 select CPU_HAS_INTEVT 197 select CPU_HAS_SR_RB 198 select CPU_HAS_FPU if !CPU_SH4AL_DSP 199 select SH_INTC 200 select SYS_SUPPORTS_SH_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_SH_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 232config CPU_HAS_PMU 233 depends on CPU_SH4 || CPU_SH4A 234 default y 235 bool 236 237if SUPERH32 238 239choice 240 prompt "Processor sub-type selection" 241 242# 243# Processor subtypes 244# 245 246# SH-2 Processor Support 247 248config CPU_SUBTYPE_SH7619 249 bool "Support SH7619 processor" 250 select CPU_SH2 251 select SYS_SUPPORTS_SH_CMT 252 253config CPU_SUBTYPE_J2 254 bool "Support J2 processor" 255 select CPU_J2 256 select SYS_SUPPORTS_SMP 257 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 258 259# SH-2A Processor Support 260 261config CPU_SUBTYPE_SH7201 262 bool "Support SH7201 processor" 263 select CPU_SH2A 264 select CPU_HAS_FPU 265 select SYS_SUPPORTS_SH_MTU2 266 267config CPU_SUBTYPE_SH7203 268 bool "Support SH7203 processor" 269 select CPU_SH2A 270 select CPU_HAS_FPU 271 select SYS_SUPPORTS_SH_CMT 272 select SYS_SUPPORTS_SH_MTU2 273 select PINCTRL 274 275config CPU_SUBTYPE_SH7206 276 bool "Support SH7206 processor" 277 select CPU_SH2A 278 select SYS_SUPPORTS_SH_CMT 279 select SYS_SUPPORTS_SH_MTU2 280 281config CPU_SUBTYPE_SH7263 282 bool "Support SH7263 processor" 283 select CPU_SH2A 284 select CPU_HAS_FPU 285 select SYS_SUPPORTS_SH_CMT 286 select SYS_SUPPORTS_SH_MTU2 287 288config CPU_SUBTYPE_SH7264 289 bool "Support SH7264 processor" 290 select CPU_SH2A 291 select CPU_HAS_FPU 292 select SYS_SUPPORTS_SH_CMT 293 select SYS_SUPPORTS_SH_MTU2 294 select PINCTRL 295 296config CPU_SUBTYPE_SH7269 297 bool "Support SH7269 processor" 298 select CPU_SH2A 299 select CPU_HAS_FPU 300 select SYS_SUPPORTS_SH_CMT 301 select SYS_SUPPORTS_SH_MTU2 302 select PINCTRL 303 304config CPU_SUBTYPE_MXG 305 bool "Support MX-G processor" 306 select CPU_SH2A 307 select SYS_SUPPORTS_SH_MTU2 308 help 309 Select MX-G if running on an R8A03022BG part. 310 311# SH-3 Processor Support 312 313config CPU_SUBTYPE_SH7705 314 bool "Support SH7705 processor" 315 select CPU_SH3 316 317config CPU_SUBTYPE_SH7706 318 bool "Support SH7706 processor" 319 select CPU_SH3 320 help 321 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 322 323config CPU_SUBTYPE_SH7707 324 bool "Support SH7707 processor" 325 select CPU_SH3 326 help 327 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 328 329config CPU_SUBTYPE_SH7708 330 bool "Support SH7708 processor" 331 select CPU_SH3 332 help 333 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 334 if you have a 100 Mhz SH-3 HD6417708R CPU. 335 336config CPU_SUBTYPE_SH7709 337 bool "Support SH7709 processor" 338 select CPU_SH3 339 help 340 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 341 342config CPU_SUBTYPE_SH7710 343 bool "Support SH7710 processor" 344 select CPU_SH3 345 select CPU_HAS_DSP 346 help 347 Select SH7710 if you have a SH3-DSP SH7710 CPU. 348 349config CPU_SUBTYPE_SH7712 350 bool "Support SH7712 processor" 351 select CPU_SH3 352 select CPU_HAS_DSP 353 help 354 Select SH7712 if you have a SH3-DSP SH7712 CPU. 355 356config CPU_SUBTYPE_SH7720 357 bool "Support SH7720 processor" 358 select CPU_SH3 359 select CPU_HAS_DSP 360 select SYS_SUPPORTS_SH_CMT 361 select USB_OHCI_SH if USB_OHCI_HCD 362 select PINCTRL 363 help 364 Select SH7720 if you have a SH3-DSP SH7720 CPU. 365 366config CPU_SUBTYPE_SH7721 367 bool "Support SH7721 processor" 368 select CPU_SH3 369 select CPU_HAS_DSP 370 select SYS_SUPPORTS_SH_CMT 371 select USB_OHCI_SH if USB_OHCI_HCD 372 help 373 Select SH7721 if you have a SH3-DSP SH7721 CPU. 374 375# SH-4 Processor Support 376 377config CPU_SUBTYPE_SH7750 378 bool "Support SH7750 processor" 379 select CPU_SH4 380 help 381 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 382 383config CPU_SUBTYPE_SH7091 384 bool "Support SH7091 processor" 385 select CPU_SH4 386 help 387 Select SH7091 if you have an SH-4 based Sega device (such as 388 the Dreamcast, Naomi, and Naomi 2). 389 390config CPU_SUBTYPE_SH7750R 391 bool "Support SH7750R processor" 392 select CPU_SH4 393 394config CPU_SUBTYPE_SH7750S 395 bool "Support SH7750S processor" 396 select CPU_SH4 397 398config CPU_SUBTYPE_SH7751 399 bool "Support SH7751 processor" 400 select CPU_SH4 401 help 402 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 403 or if you have a HD6417751R CPU. 404 405config CPU_SUBTYPE_SH7751R 406 bool "Support SH7751R processor" 407 select CPU_SH4 408 409config CPU_SUBTYPE_SH7760 410 bool "Support SH7760 processor" 411 select CPU_SH4 412 413config CPU_SUBTYPE_SH4_202 414 bool "Support SH4-202 processor" 415 select CPU_SH4 416 417# SH-4A Processor Support 418 419config CPU_SUBTYPE_SH7723 420 bool "Support SH7723 processor" 421 select CPU_SH4A 422 select CPU_SHX2 423 select ARCH_SHMOBILE 424 select ARCH_SPARSEMEM_ENABLE 425 select SYS_SUPPORTS_SH_CMT 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_SH_CMT 437 select PINCTRL 438 help 439 Select SH7724 if you have an SH-MobileR2R CPU. 440 441config CPU_SUBTYPE_SH7734 442 bool "Support SH7734 processor" 443 select CPU_SH4A 444 select CPU_SHX2 445 select PINCTRL 446 help 447 Select SH7734 if you have a SH4A SH7734 CPU. 448 449config CPU_SUBTYPE_SH7757 450 bool "Support SH7757 processor" 451 select CPU_SH4A 452 select CPU_SHX2 453 select PINCTRL 454 help 455 Select SH7757 if you have a SH4A SH7757 CPU. 456 457config CPU_SUBTYPE_SH7763 458 bool "Support SH7763 processor" 459 select CPU_SH4A 460 select USB_OHCI_SH if USB_OHCI_HCD 461 help 462 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 463 464config CPU_SUBTYPE_SH7770 465 bool "Support SH7770 processor" 466 select CPU_SH4A 467 468config CPU_SUBTYPE_SH7780 469 bool "Support SH7780 processor" 470 select CPU_SH4A 471 472config CPU_SUBTYPE_SH7785 473 bool "Support SH7785 processor" 474 select CPU_SH4A 475 select CPU_SHX2 476 select ARCH_SPARSEMEM_ENABLE 477 select SYS_SUPPORTS_NUMA 478 select PINCTRL 479 480config CPU_SUBTYPE_SH7786 481 bool "Support SH7786 processor" 482 select CPU_SH4A 483 select CPU_SHX3 484 select CPU_HAS_PTEAEX 485 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 486 select USB_OHCI_SH if USB_OHCI_HCD 487 select USB_EHCI_SH if USB_EHCI_HCD 488 select PINCTRL 489 490config CPU_SUBTYPE_SHX3 491 bool "Support SH-X3 processor" 492 select CPU_SH4A 493 select CPU_SHX3 494 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 495 select GPIOLIB 496 select PINCTRL 497 498# SH4AL-DSP Processor Support 499 500config CPU_SUBTYPE_SH7343 501 bool "Support SH7343 processor" 502 select CPU_SH4AL_DSP 503 select ARCH_SHMOBILE 504 select SYS_SUPPORTS_SH_CMT 505 506config CPU_SUBTYPE_SH7722 507 bool "Support SH7722 processor" 508 select CPU_SH4AL_DSP 509 select CPU_SHX2 510 select ARCH_SHMOBILE 511 select ARCH_SPARSEMEM_ENABLE 512 select SYS_SUPPORTS_NUMA 513 select SYS_SUPPORTS_SH_CMT 514 select PINCTRL 515 516config CPU_SUBTYPE_SH7366 517 bool "Support SH7366 processor" 518 select CPU_SH4AL_DSP 519 select CPU_SHX2 520 select ARCH_SHMOBILE 521 select ARCH_SPARSEMEM_ENABLE 522 select SYS_SUPPORTS_NUMA 523 select SYS_SUPPORTS_SH_CMT 524 525endchoice 526 527endif 528 529if SUPERH64 530 531choice 532 prompt "Processor sub-type selection" 533 534# SH-5 Processor Support 535 536config CPU_SUBTYPE_SH5_101 537 bool "Support SH5-101 processor" 538 select CPU_SH5 539 540config CPU_SUBTYPE_SH5_103 541 bool "Support SH5-103 processor" 542 select CPU_SH5 543 544endchoice 545 546endif 547 548source "arch/sh/mm/Kconfig" 549 550source "arch/sh/Kconfig.cpu" 551 552source "arch/sh/boards/Kconfig" 553 554menu "Timer and clock configuration" 555 556config SH_PCLK_FREQ 557 int "Peripheral clock frequency (in Hz)" 558 depends on SH_CLK_CPG_LEGACY 559 default "31250000" if CPU_SUBTYPE_SH7619 560 default "33333333" if CPU_SUBTYPE_SH7770 || \ 561 CPU_SUBTYPE_SH7760 || \ 562 CPU_SUBTYPE_SH7705 || \ 563 CPU_SUBTYPE_SH7203 || \ 564 CPU_SUBTYPE_SH7206 || \ 565 CPU_SUBTYPE_SH7263 || \ 566 CPU_SUBTYPE_MXG 567 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 568 default "66000000" if CPU_SUBTYPE_SH4_202 569 default "50000000" 570 help 571 This option is used to specify the peripheral clock frequency. 572 This is necessary for determining the reference clock value on 573 platforms lacking an RTC. 574 575config SH_CLK_CPG 576 def_bool y 577 578config SH_CLK_CPG_LEGACY 579 depends on SH_CLK_CPG 580 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 581 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 582 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 583 !CPU_SUBTYPE_SH7269 584 585endmenu 586 587menu "CPU Frequency scaling" 588source "drivers/cpufreq/Kconfig" 589endmenu 590 591source "arch/sh/drivers/Kconfig" 592 593endmenu 594 595menu "Kernel features" 596 597source "kernel/Kconfig.hz" 598 599config KEXEC 600 bool "kexec system call (EXPERIMENTAL)" 601 depends on SUPERH32 && MMU 602 select KEXEC_CORE 603 help 604 kexec is a system call that implements the ability to shutdown your 605 current kernel, and to start another kernel. It is like a reboot 606 but it is independent of the system firmware. And like a reboot 607 you can start any kernel with it, not just Linux. 608 609 The name comes from the similarity to the exec system call. 610 611 It is an ongoing process to be certain the hardware in a machine 612 is properly shutdown, so do not be surprised if this code does not 613 initially work for you. As of this writing the exact hardware 614 interface is strongly in flux, so no good recommendation can be 615 made. 616 617config CRASH_DUMP 618 bool "kernel crash dumps (EXPERIMENTAL)" 619 depends on SUPERH32 && BROKEN_ON_SMP 620 help 621 Generate crash dump after being started by kexec. 622 This should be normally only set in special crash dump kernels 623 which are loaded in the main kernel with kexec-tools into 624 a specially reserved region and then later executed after 625 a crash by kdump/kexec. The crash dump kernel must be compiled 626 to a memory address not used by the main kernel using 627 PHYSICAL_START. 628 629 For more details see Documentation/admin-guide/kdump/kdump.rst 630 631config KEXEC_JUMP 632 bool "kexec jump (EXPERIMENTAL)" 633 depends on SUPERH32 && KEXEC && HIBERNATION 634 help 635 Jump between original kernel and kexeced kernel and invoke 636 code via KEXEC 637 638config PHYSICAL_START 639 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 640 default MEMORY_START 641 ---help--- 642 This gives the physical address where the kernel is loaded 643 and is ordinarily the same as MEMORY_START. 644 645 Different values are primarily used in the case of kexec on panic 646 where the fail safe kernel needs to run at a different address 647 than the panic-ed kernel. 648 649config SECCOMP 650 bool "Enable seccomp to safely compute untrusted bytecode" 651 depends on PROC_FS 652 help 653 This kernel feature is useful for number crunching applications 654 that may need to compute untrusted bytecode during their 655 execution. By using pipes or other transports made available to 656 the process as file descriptors supporting the read/write 657 syscalls, it's possible to isolate those applications in 658 their own address space using seccomp. Once seccomp is 659 enabled via prctl, it cannot be disabled and the task is only 660 allowed to execute a few safe syscalls defined by each seccomp 661 mode. 662 663 If unsure, say N. 664 665config SMP 666 bool "Symmetric multi-processing support" 667 depends on SYS_SUPPORTS_SMP 668 ---help--- 669 This enables support for systems with more than one CPU. If you have 670 a system with only one CPU, say N. If you have a system with more 671 than one CPU, say Y. 672 673 If you say N here, the kernel will run on uni- and multiprocessor 674 machines, but will use only one CPU of a multiprocessor machine. If 675 you say Y here, the kernel will run on many, but not all, 676 uniprocessor machines. On a uniprocessor machine, the kernel 677 will run faster if you say N here. 678 679 People using multiprocessor machines who say Y here should also say 680 Y to "Enhanced Real Time Clock Support", below. 681 682 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 683 available at <http://www.tldp.org/docs.html#howto>. 684 685 If you don't know what to do here, say N. 686 687config NR_CPUS 688 int "Maximum number of CPUs (2-32)" 689 range 2 32 690 depends on SMP 691 default "4" if CPU_SUBTYPE_SHX3 692 default "2" 693 help 694 This allows you to specify the maximum number of CPUs which this 695 kernel will support. The maximum supported value is 32 and the 696 minimum value which makes sense is 2. 697 698 This is purely to save memory - each supported CPU adds 699 approximately eight kilobytes to the kernel image. 700 701config HOTPLUG_CPU 702 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 703 depends on SMP 704 help 705 Say Y here to experiment with turning CPUs off and on. CPUs 706 can be controlled through /sys/devices/system/cpu. 707 708config GUSA 709 def_bool y 710 depends on !SMP && SUPERH32 711 help 712 This enables support for gUSA (general UserSpace Atomicity). 713 This is the default implementation for both UP and non-ll/sc 714 CPUs, and is used by the libc, amongst others. 715 716 For additional information, design information can be found 717 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 718 719 This should only be disabled for special cases where alternate 720 atomicity implementations exist. 721 722config GUSA_RB 723 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 724 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 725 help 726 Enabling this option will allow the kernel to implement some 727 atomic operations using a software implementation of load-locked/ 728 store-conditional (LLSC). On machines which do not have hardware 729 LLSC, this should be more efficient than the other alternative of 730 disabling interrupts around the atomic sequence. 731 732config HW_PERF_EVENTS 733 bool "Enable hardware performance counter support for perf events" 734 depends on PERF_EVENTS && CPU_HAS_PMU 735 default y 736 help 737 Enable hardware performance counter support for perf events. If 738 disabled, perf events will use software events only. 739 740source "drivers/sh/Kconfig" 741 742endmenu 743 744menu "Boot options" 745 746config USE_BUILTIN_DTB 747 bool "Use builtin DTB" 748 default n 749 depends on SH_DEVICE_TREE 750 help 751 Link a device tree blob for particular hardware into the kernel, 752 suppressing use of the DTB pointer provided by the bootloader. 753 This option should only be used with legacy bootloaders that are 754 not capable of providing a DTB to the kernel, or for experimental 755 hardware without stable device tree bindings. 756 757config BUILTIN_DTB_SOURCE 758 string "Source file for builtin DTB" 759 default "" 760 depends on USE_BUILTIN_DTB 761 help 762 Base name (without suffix, relative to arch/sh/boot/dts) for the 763 a DTS file that will be used to produce the DTB linked into the 764 kernel. 765 766config ZERO_PAGE_OFFSET 767 hex 768 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 769 SH_7751_SOLUTION_ENGINE 770 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 771 default "0x00002000" if PAGE_SIZE_8KB 772 default "0x00001000" 773 help 774 This sets the default offset of zero page. 775 776config BOOT_LINK_OFFSET 777 hex 778 default "0x00210000" if SH_SHMIN 779 default "0x00400000" if SH_CAYMAN 780 default "0x00810000" if SH_7780_SOLUTION_ENGINE 781 default "0x009e0000" if SH_TITAN 782 default "0x01800000" if SH_SDK7780 783 default "0x02000000" if SH_EDOSK7760 784 default "0x00800000" 785 help 786 This option allows you to set the link address offset of the zImage. 787 This can be useful if you are on a board which has a small amount of 788 memory. 789 790config ENTRY_OFFSET 791 hex 792 default "0x00001000" if PAGE_SIZE_4KB 793 default "0x00002000" if PAGE_SIZE_8KB 794 default "0x00004000" if PAGE_SIZE_16KB 795 default "0x00010000" if PAGE_SIZE_64KB 796 default "0x00000000" 797 798config ROMIMAGE_MMCIF 799 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 800 depends on CPU_SUBTYPE_SH7724 801 help 802 Say Y here to include experimental MMCIF loading code in 803 romImage. With this enabled it is possible to write the romImage 804 kernel image to an MMC card and boot the kernel straight from 805 the reset vector. At reset the processor Mask ROM will load the 806 first part of the romImage which in turn loads the rest the kernel 807 image to RAM using the MMCIF hardware block. 808 809choice 810 prompt "Kernel command line" 811 optional 812 default CMDLINE_OVERWRITE 813 help 814 Setting this option allows the kernel command line arguments 815 to be set. 816 817config CMDLINE_OVERWRITE 818 bool "Overwrite bootloader kernel arguments" 819 help 820 Given string will overwrite any arguments passed in by 821 a bootloader. 822 823config CMDLINE_EXTEND 824 bool "Extend bootloader kernel arguments" 825 help 826 Given string will be concatenated with arguments passed in 827 by a bootloader. 828 829endchoice 830 831config CMDLINE 832 string "Kernel command line arguments string" 833 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 834 default "console=ttySC1,115200" 835 836endmenu 837 838menu "Bus options" 839 840config SUPERHYWAY 841 tristate "SuperHyway Bus support" 842 depends on CPU_SUBTYPE_SH4_202 843 844config MAPLE 845 bool "Maple Bus support" 846 depends on SH_DREAMCAST 847 help 848 The Maple Bus is SEGA's serial communication bus for peripherals 849 on the Dreamcast. Without this bus support you won't be able to 850 get your Dreamcast keyboard etc to work, so most users 851 probably want to say 'Y' here, unless you are only using the 852 Dreamcast with a serial line terminal or a remote network 853 connection. 854 855endmenu 856 857menu "Power management options (EXPERIMENTAL)" 858 859source "kernel/power/Kconfig" 860 861source "drivers/cpuidle/Kconfig" 862 863endmenu 864