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_DECLARE_COHERENT 11 select HAVE_IDE if HAS_IOPORT_MAP 12 select HAVE_MEMBLOCK_NODE_MAP 13 select ARCH_DISCARD_MEMBLOCK 14 select HAVE_OPROFILE 15 select HAVE_ARCH_TRACEHOOK 16 select HAVE_PERF_EVENTS 17 select HAVE_DEBUG_BUGVERBOSE 18 select ARCH_HAVE_CUSTOM_GPIO_H 19 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 20 select ARCH_HAS_GCOV_PROFILE_ALL 21 select PERF_USE_VMALLOC 22 select HAVE_DEBUG_KMEMLEAK 23 select HAVE_KERNEL_GZIP 24 select CPU_NO_EFFICIENT_FFS 25 select HAVE_KERNEL_BZIP2 26 select HAVE_KERNEL_LZMA 27 select HAVE_KERNEL_XZ 28 select HAVE_KERNEL_LZO 29 select HAVE_UID16 30 select ARCH_WANT_IPC_PARSE_VERSION 31 select HAVE_SYSCALL_TRACEPOINTS 32 select HAVE_REGS_AND_STACK_ACCESS_API 33 select MAY_HAVE_SPARSE_IRQ 34 select IRQ_FORCED_THREADING 35 select RTC_LIB 36 select GENERIC_ATOMIC64 37 select GENERIC_IRQ_SHOW 38 select GENERIC_SMP_IDLE_THREAD 39 select GENERIC_IDLE_POLL_SETUP 40 select GENERIC_CLOCKEVENTS 41 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 42 select GENERIC_PCI_IOMAP if PCI 43 select GENERIC_SCHED_CLOCK 44 select GENERIC_STRNCPY_FROM_USER 45 select GENERIC_STRNLEN_USER 46 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 47 select MODULES_USE_ELF_RELA 48 select NO_GENERIC_PCI_IOPORT_MAP if PCI 49 select OLD_SIGSUSPEND 50 select OLD_SIGACTION 51 select PCI_DOMAINS if PCI 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 "$(ARCH)" = "sh" 65 select ARCH_32BIT_OFF_T 66 select HAVE_KPROBES 67 select HAVE_KRETPROBES 68 select HAVE_IOREMAP_PROT if MMU && !X2TLB 69 select HAVE_FUNCTION_TRACER 70 select HAVE_FTRACE_MCOUNT_RECORD 71 select HAVE_DYNAMIC_FTRACE 72 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 73 select ARCH_WANT_IPC_PARSE_VERSION 74 select HAVE_FUNCTION_GRAPH_TRACER 75 select HAVE_ARCH_KGDB 76 select HAVE_HW_BREAKPOINT 77 select HAVE_MIXED_BREAKPOINTS_REGS 78 select PERF_EVENTS 79 select ARCH_HIBERNATION_POSSIBLE if MMU 80 select SPARSE_IRQ 81 select HAVE_STACKPROTECTOR 82 83config SUPERH64 84 def_bool "$(ARCH)" = "sh64" 85 select HAVE_EXIT_THREAD 86 select KALLSYMS 87 88config ARCH_DEFCONFIG 89 string 90 default "arch/sh/configs/shx3_defconfig" if SUPERH32 91 default "arch/sh/configs/cayman_defconfig" if SUPERH64 92 93config RWSEM_GENERIC_SPINLOCK 94 def_bool y 95 96config RWSEM_XCHGADD_ALGORITHM 97 bool 98 99config GENERIC_BUG 100 def_bool y 101 depends on BUG && SUPERH32 102 103config GENERIC_CSUM 104 def_bool y 105 depends on SUPERH64 106 107config GENERIC_HWEIGHT 108 def_bool y 109 110config GENERIC_CALIBRATE_DELAY 111 bool 112 113config GENERIC_LOCKBREAK 114 def_bool y 115 depends on SMP && PREEMPT 116 117config ARCH_SUSPEND_POSSIBLE 118 def_bool n 119 120config ARCH_HIBERNATION_POSSIBLE 121 def_bool n 122 123config SYS_SUPPORTS_APM_EMULATION 124 bool 125 select ARCH_SUSPEND_POSSIBLE 126 127config SYS_SUPPORTS_HUGETLBFS 128 bool 129 130config SYS_SUPPORTS_SMP 131 bool 132 133config SYS_SUPPORTS_NUMA 134 bool 135 136config STACKTRACE_SUPPORT 137 def_bool y 138 139config LOCKDEP_SUPPORT 140 def_bool y 141 142config ARCH_HAS_ILOG2_U32 143 def_bool n 144 145config ARCH_HAS_ILOG2_U64 146 def_bool n 147 148config NO_IOPORT_MAP 149 def_bool !PCI 150 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 151 !SH_HP6XX && !SH_SOLUTION_ENGINE 152 153config IO_TRAPPED 154 bool 155 156config SWAP_IO_SPACE 157 bool 158 159config DMA_COHERENT 160 bool 161 162config DMA_NONCOHERENT 163 def_bool !DMA_COHERENT 164 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 165 166config PGTABLE_LEVELS 167 default 3 if X2TLB 168 default 2 169 170menu "System type" 171 172# 173# Processor families 174# 175config CPU_SH2 176 bool 177 select SH_INTC 178 179config CPU_SH2A 180 bool 181 select CPU_SH2 182 select UNCACHED_MAPPING 183 184config CPU_J2 185 bool 186 select CPU_SH2 187 select OF 188 select OF_EARLY_FLATTREE 189 190config CPU_SH3 191 bool 192 select CPU_HAS_INTEVT 193 select CPU_HAS_SR_RB 194 select SH_INTC 195 select SYS_SUPPORTS_SH_TMU 196 197config CPU_SH4 198 bool 199 select CPU_HAS_INTEVT 200 select CPU_HAS_SR_RB 201 select CPU_HAS_FPU if !CPU_SH4AL_DSP 202 select SH_INTC 203 select SYS_SUPPORTS_SH_TMU 204 select SYS_SUPPORTS_HUGETLBFS if MMU 205 206config CPU_SH4A 207 bool 208 select CPU_SH4 209 210config CPU_SH4AL_DSP 211 bool 212 select CPU_SH4A 213 select CPU_HAS_DSP 214 215config CPU_SH5 216 bool 217 select CPU_HAS_FPU 218 select SYS_SUPPORTS_SH_TMU 219 select SYS_SUPPORTS_HUGETLBFS if MMU 220 221config CPU_SHX2 222 bool 223 224config CPU_SHX3 225 bool 226 select DMA_COHERENT 227 select SYS_SUPPORTS_SMP 228 select SYS_SUPPORTS_NUMA 229 230config ARCH_SHMOBILE 231 bool 232 select ARCH_SUSPEND_POSSIBLE 233 select PM 234 235config CPU_HAS_PMU 236 depends on CPU_SH4 || CPU_SH4A 237 default y 238 bool 239 240if SUPERH32 241 242choice 243 prompt "Processor sub-type selection" 244 245# 246# Processor subtypes 247# 248 249# SH-2 Processor Support 250 251config CPU_SUBTYPE_SH7619 252 bool "Support SH7619 processor" 253 select CPU_SH2 254 select SYS_SUPPORTS_SH_CMT 255 256config CPU_SUBTYPE_J2 257 bool "Support J2 processor" 258 select CPU_J2 259 select SYS_SUPPORTS_SMP 260 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 261 262# SH-2A Processor Support 263 264config CPU_SUBTYPE_SH7201 265 bool "Support SH7201 processor" 266 select CPU_SH2A 267 select CPU_HAS_FPU 268 select SYS_SUPPORTS_SH_MTU2 269 270config CPU_SUBTYPE_SH7203 271 bool "Support SH7203 processor" 272 select CPU_SH2A 273 select CPU_HAS_FPU 274 select SYS_SUPPORTS_SH_CMT 275 select SYS_SUPPORTS_SH_MTU2 276 select PINCTRL 277 278config CPU_SUBTYPE_SH7206 279 bool "Support SH7206 processor" 280 select CPU_SH2A 281 select SYS_SUPPORTS_SH_CMT 282 select SYS_SUPPORTS_SH_MTU2 283 284config CPU_SUBTYPE_SH7263 285 bool "Support SH7263 processor" 286 select CPU_SH2A 287 select CPU_HAS_FPU 288 select SYS_SUPPORTS_SH_CMT 289 select SYS_SUPPORTS_SH_MTU2 290 291config CPU_SUBTYPE_SH7264 292 bool "Support SH7264 processor" 293 select CPU_SH2A 294 select CPU_HAS_FPU 295 select SYS_SUPPORTS_SH_CMT 296 select SYS_SUPPORTS_SH_MTU2 297 select PINCTRL 298 299config CPU_SUBTYPE_SH7269 300 bool "Support SH7269 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_MXG 308 bool "Support MX-G processor" 309 select CPU_SH2A 310 select SYS_SUPPORTS_SH_MTU2 311 help 312 Select MX-G if running on an R8A03022BG part. 313 314# SH-3 Processor Support 315 316config CPU_SUBTYPE_SH7705 317 bool "Support SH7705 processor" 318 select CPU_SH3 319 320config CPU_SUBTYPE_SH7706 321 bool "Support SH7706 processor" 322 select CPU_SH3 323 help 324 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 325 326config CPU_SUBTYPE_SH7707 327 bool "Support SH7707 processor" 328 select CPU_SH3 329 help 330 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 331 332config CPU_SUBTYPE_SH7708 333 bool "Support SH7708 processor" 334 select CPU_SH3 335 help 336 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 337 if you have a 100 Mhz SH-3 HD6417708R CPU. 338 339config CPU_SUBTYPE_SH7709 340 bool "Support SH7709 processor" 341 select CPU_SH3 342 help 343 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 344 345config CPU_SUBTYPE_SH7710 346 bool "Support SH7710 processor" 347 select CPU_SH3 348 select CPU_HAS_DSP 349 help 350 Select SH7710 if you have a SH3-DSP SH7710 CPU. 351 352config CPU_SUBTYPE_SH7712 353 bool "Support SH7712 processor" 354 select CPU_SH3 355 select CPU_HAS_DSP 356 help 357 Select SH7712 if you have a SH3-DSP SH7712 CPU. 358 359config CPU_SUBTYPE_SH7720 360 bool "Support SH7720 processor" 361 select CPU_SH3 362 select CPU_HAS_DSP 363 select SYS_SUPPORTS_SH_CMT 364 select USB_OHCI_SH if USB_OHCI_HCD 365 select PINCTRL 366 help 367 Select SH7720 if you have a SH3-DSP SH7720 CPU. 368 369config CPU_SUBTYPE_SH7721 370 bool "Support SH7721 processor" 371 select CPU_SH3 372 select CPU_HAS_DSP 373 select SYS_SUPPORTS_SH_CMT 374 select USB_OHCI_SH if USB_OHCI_HCD 375 help 376 Select SH7721 if you have a SH3-DSP SH7721 CPU. 377 378# SH-4 Processor Support 379 380config CPU_SUBTYPE_SH7750 381 bool "Support SH7750 processor" 382 select CPU_SH4 383 help 384 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 385 386config CPU_SUBTYPE_SH7091 387 bool "Support SH7091 processor" 388 select CPU_SH4 389 help 390 Select SH7091 if you have an SH-4 based Sega device (such as 391 the Dreamcast, Naomi, and Naomi 2). 392 393config CPU_SUBTYPE_SH7750R 394 bool "Support SH7750R processor" 395 select CPU_SH4 396 397config CPU_SUBTYPE_SH7750S 398 bool "Support SH7750S processor" 399 select CPU_SH4 400 401config CPU_SUBTYPE_SH7751 402 bool "Support SH7751 processor" 403 select CPU_SH4 404 help 405 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 406 or if you have a HD6417751R CPU. 407 408config CPU_SUBTYPE_SH7751R 409 bool "Support SH7751R processor" 410 select CPU_SH4 411 412config CPU_SUBTYPE_SH7760 413 bool "Support SH7760 processor" 414 select CPU_SH4 415 416config CPU_SUBTYPE_SH4_202 417 bool "Support SH4-202 processor" 418 select CPU_SH4 419 420# SH-4A Processor Support 421 422config CPU_SUBTYPE_SH7723 423 bool "Support SH7723 processor" 424 select CPU_SH4A 425 select CPU_SHX2 426 select ARCH_SHMOBILE 427 select ARCH_SPARSEMEM_ENABLE 428 select SYS_SUPPORTS_SH_CMT 429 select PINCTRL 430 help 431 Select SH7723 if you have an SH-MobileR2 CPU. 432 433config CPU_SUBTYPE_SH7724 434 bool "Support SH7724 processor" 435 select CPU_SH4A 436 select CPU_SHX2 437 select ARCH_SHMOBILE 438 select ARCH_SPARSEMEM_ENABLE 439 select SYS_SUPPORTS_SH_CMT 440 select PINCTRL 441 help 442 Select SH7724 if you have an SH-MobileR2R CPU. 443 444config CPU_SUBTYPE_SH7734 445 bool "Support SH7734 processor" 446 select CPU_SH4A 447 select CPU_SHX2 448 select PINCTRL 449 help 450 Select SH7734 if you have a SH4A SH7734 CPU. 451 452config CPU_SUBTYPE_SH7757 453 bool "Support SH7757 processor" 454 select CPU_SH4A 455 select CPU_SHX2 456 select PINCTRL 457 help 458 Select SH7757 if you have a SH4A SH7757 CPU. 459 460config CPU_SUBTYPE_SH7763 461 bool "Support SH7763 processor" 462 select CPU_SH4A 463 select USB_OHCI_SH if USB_OHCI_HCD 464 help 465 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 466 467config CPU_SUBTYPE_SH7770 468 bool "Support SH7770 processor" 469 select CPU_SH4A 470 471config CPU_SUBTYPE_SH7780 472 bool "Support SH7780 processor" 473 select CPU_SH4A 474 475config CPU_SUBTYPE_SH7785 476 bool "Support SH7785 processor" 477 select CPU_SH4A 478 select CPU_SHX2 479 select ARCH_SPARSEMEM_ENABLE 480 select SYS_SUPPORTS_NUMA 481 select PINCTRL 482 483config CPU_SUBTYPE_SH7786 484 bool "Support SH7786 processor" 485 select CPU_SH4A 486 select CPU_SHX3 487 select CPU_HAS_PTEAEX 488 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 489 select USB_OHCI_SH if USB_OHCI_HCD 490 select USB_EHCI_SH if USB_EHCI_HCD 491 select PINCTRL 492 493config CPU_SUBTYPE_SHX3 494 bool "Support SH-X3 processor" 495 select CPU_SH4A 496 select CPU_SHX3 497 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 498 select GPIOLIB 499 select PINCTRL 500 501# SH4AL-DSP Processor Support 502 503config CPU_SUBTYPE_SH7343 504 bool "Support SH7343 processor" 505 select CPU_SH4AL_DSP 506 select ARCH_SHMOBILE 507 select SYS_SUPPORTS_SH_CMT 508 509config CPU_SUBTYPE_SH7722 510 bool "Support SH7722 processor" 511 select CPU_SH4AL_DSP 512 select CPU_SHX2 513 select ARCH_SHMOBILE 514 select ARCH_SPARSEMEM_ENABLE 515 select SYS_SUPPORTS_NUMA 516 select SYS_SUPPORTS_SH_CMT 517 select PINCTRL 518 519config CPU_SUBTYPE_SH7366 520 bool "Support SH7366 processor" 521 select CPU_SH4AL_DSP 522 select CPU_SHX2 523 select ARCH_SHMOBILE 524 select ARCH_SPARSEMEM_ENABLE 525 select SYS_SUPPORTS_NUMA 526 select SYS_SUPPORTS_SH_CMT 527 528endchoice 529 530endif 531 532if SUPERH64 533 534choice 535 prompt "Processor sub-type selection" 536 537# SH-5 Processor Support 538 539config CPU_SUBTYPE_SH5_101 540 bool "Support SH5-101 processor" 541 select CPU_SH5 542 543config CPU_SUBTYPE_SH5_103 544 bool "Support SH5-103 processor" 545 select CPU_SH5 546 547endchoice 548 549endif 550 551source "arch/sh/mm/Kconfig" 552 553source "arch/sh/Kconfig.cpu" 554 555source "arch/sh/boards/Kconfig" 556 557menu "Timer and clock configuration" 558 559config SH_PCLK_FREQ 560 int "Peripheral clock frequency (in Hz)" 561 depends on SH_CLK_CPG_LEGACY 562 default "31250000" if CPU_SUBTYPE_SH7619 563 default "33333333" if CPU_SUBTYPE_SH7770 || \ 564 CPU_SUBTYPE_SH7760 || \ 565 CPU_SUBTYPE_SH7705 || \ 566 CPU_SUBTYPE_SH7203 || \ 567 CPU_SUBTYPE_SH7206 || \ 568 CPU_SUBTYPE_SH7263 || \ 569 CPU_SUBTYPE_MXG 570 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 571 default "66000000" if CPU_SUBTYPE_SH4_202 572 default "50000000" 573 help 574 This option is used to specify the peripheral clock frequency. 575 This is necessary for determining the reference clock value on 576 platforms lacking an RTC. 577 578config SH_CLK_CPG 579 def_bool y 580 581config SH_CLK_CPG_LEGACY 582 depends on SH_CLK_CPG 583 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 584 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 585 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 586 !CPU_SUBTYPE_SH7269 587 588endmenu 589 590menu "CPU Frequency scaling" 591source "drivers/cpufreq/Kconfig" 592endmenu 593 594source "arch/sh/drivers/Kconfig" 595 596endmenu 597 598menu "Kernel features" 599 600source "kernel/Kconfig.hz" 601 602config KEXEC 603 bool "kexec system call (EXPERIMENTAL)" 604 depends on SUPERH32 && MMU 605 select KEXEC_CORE 606 help 607 kexec is a system call that implements the ability to shutdown your 608 current kernel, and to start another kernel. It is like a reboot 609 but it is independent of the system firmware. And like a reboot 610 you can start any kernel with it, not just Linux. 611 612 The name comes from the similarity to the exec system call. 613 614 It is an ongoing process to be certain the hardware in a machine 615 is properly shutdown, so do not be surprised if this code does not 616 initially work for you. As of this writing the exact hardware 617 interface is strongly in flux, so no good recommendation can be 618 made. 619 620config CRASH_DUMP 621 bool "kernel crash dumps (EXPERIMENTAL)" 622 depends on SUPERH32 && BROKEN_ON_SMP 623 help 624 Generate crash dump after being started by kexec. 625 This should be normally only set in special crash dump kernels 626 which are loaded in the main kernel with kexec-tools into 627 a specially reserved region and then later executed after 628 a crash by kdump/kexec. The crash dump kernel must be compiled 629 to a memory address not used by the main kernel using 630 PHYSICAL_START. 631 632 For more details see Documentation/kdump/kdump.txt 633 634config KEXEC_JUMP 635 bool "kexec jump (EXPERIMENTAL)" 636 depends on SUPERH32 && KEXEC && HIBERNATION 637 help 638 Jump between original kernel and kexeced kernel and invoke 639 code via KEXEC 640 641config PHYSICAL_START 642 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 643 default MEMORY_START 644 ---help--- 645 This gives the physical address where the kernel is loaded 646 and is ordinarily the same as MEMORY_START. 647 648 Different values are primarily used in the case of kexec on panic 649 where the fail safe kernel needs to run at a different address 650 than the panic-ed kernel. 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 ---help--- 672 This enables support for systems with more than one CPU. If you have 673 a system with only one CPU, say N. If you have a system with more 674 than one CPU, say Y. 675 676 If you say N here, the kernel will run on uni- and multiprocessor 677 machines, but will use only one CPU of a multiprocessor machine. If 678 you say Y here, the kernel will run on many, but not all, 679 uniprocessor machines. On a uniprocessor machine, the kernel 680 will run faster if you say N here. 681 682 People using multiprocessor machines who say Y here should also say 683 Y to "Enhanced Real Time Clock Support", below. 684 685 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO 686 available at <http://www.tldp.org/docs.html#howto>. 687 688 If you don't know what to do here, say N. 689 690config NR_CPUS 691 int "Maximum number of CPUs (2-32)" 692 range 2 32 693 depends on SMP 694 default "4" if CPU_SUBTYPE_SHX3 695 default "2" 696 help 697 This allows you to specify the maximum number of CPUs which this 698 kernel will support. The maximum supported value is 32 and the 699 minimum value which makes sense is 2. 700 701 This is purely to save memory - each supported CPU adds 702 approximately eight kilobytes to the kernel image. 703 704config HOTPLUG_CPU 705 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 706 depends on SMP 707 help 708 Say Y here to experiment with turning CPUs off and on. CPUs 709 can be controlled through /sys/devices/system/cpu. 710 711config GUSA 712 def_bool y 713 depends on !SMP && SUPERH32 714 help 715 This enables support for gUSA (general UserSpace Atomicity). 716 This is the default implementation for both UP and non-ll/sc 717 CPUs, and is used by the libc, amongst others. 718 719 For additional information, design information can be found 720 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 721 722 This should only be disabled for special cases where alternate 723 atomicity implementations exist. 724 725config GUSA_RB 726 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 727 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 728 help 729 Enabling this option will allow the kernel to implement some 730 atomic operations using a software implementation of load-locked/ 731 store-conditional (LLSC). On machines which do not have hardware 732 LLSC, this should be more efficient than the other alternative of 733 disabling interrupts around the atomic sequence. 734 735config HW_PERF_EVENTS 736 bool "Enable hardware performance counter support for perf events" 737 depends on PERF_EVENTS && CPU_HAS_PMU 738 default y 739 help 740 Enable hardware performance counter support for perf events. If 741 disabled, perf events will use software events only. 742 743source "drivers/sh/Kconfig" 744 745endmenu 746 747menu "Boot options" 748 749config USE_BUILTIN_DTB 750 bool "Use builtin DTB" 751 default n 752 depends on SH_DEVICE_TREE 753 help 754 Link a device tree blob for particular hardware into the kernel, 755 suppressing use of the DTB pointer provided by the bootloader. 756 This option should only be used with legacy bootloaders that are 757 not capable of providing a DTB to the kernel, or for experimental 758 hardware without stable device tree bindings. 759 760config BUILTIN_DTB_SOURCE 761 string "Source file for builtin DTB" 762 default "" 763 depends on USE_BUILTIN_DTB 764 help 765 Base name (without suffix, relative to arch/sh/boot/dts) for the 766 a DTS file that will be used to produce the DTB linked into the 767 kernel. 768 769config ZERO_PAGE_OFFSET 770 hex 771 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 772 SH_7751_SOLUTION_ENGINE 773 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 774 default "0x00002000" if PAGE_SIZE_8KB 775 default "0x00001000" 776 help 777 This sets the default offset of zero page. 778 779config BOOT_LINK_OFFSET 780 hex 781 default "0x00210000" if SH_SHMIN 782 default "0x00400000" if SH_CAYMAN 783 default "0x00810000" if SH_7780_SOLUTION_ENGINE 784 default "0x009e0000" if SH_TITAN 785 default "0x01800000" if SH_SDK7780 786 default "0x02000000" if SH_EDOSK7760 787 default "0x00800000" 788 help 789 This option allows you to set the link address offset of the zImage. 790 This can be useful if you are on a board which has a small amount of 791 memory. 792 793config ENTRY_OFFSET 794 hex 795 default "0x00001000" if PAGE_SIZE_4KB 796 default "0x00002000" if PAGE_SIZE_8KB 797 default "0x00004000" if PAGE_SIZE_16KB 798 default "0x00010000" if PAGE_SIZE_64KB 799 default "0x00000000" 800 801config ROMIMAGE_MMCIF 802 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 803 depends on CPU_SUBTYPE_SH7724 804 help 805 Say Y here to include experimental MMCIF loading code in 806 romImage. With this enabled it is possible to write the romImage 807 kernel image to an MMC card and boot the kernel straight from 808 the reset vector. At reset the processor Mask ROM will load the 809 first part of the romImage which in turn loads the rest the kernel 810 image to RAM using the MMCIF hardware block. 811 812choice 813 prompt "Kernel command line" 814 optional 815 default CMDLINE_OVERWRITE 816 help 817 Setting this option allows the kernel command line arguments 818 to be set. 819 820config CMDLINE_OVERWRITE 821 bool "Overwrite bootloader kernel arguments" 822 help 823 Given string will overwrite any arguments passed in by 824 a bootloader. 825 826config CMDLINE_EXTEND 827 bool "Extend bootloader kernel arguments" 828 help 829 Given string will be concatenated with arguments passed in 830 by a bootloader. 831 832endchoice 833 834config CMDLINE 835 string "Kernel command line arguments string" 836 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 837 default "console=ttySC1,115200" 838 839endmenu 840 841menu "Bus options" 842 843config SUPERHYWAY 844 tristate "SuperHyway Bus support" 845 depends on CPU_SUBTYPE_SH4_202 846 847config MAPLE 848 bool "Maple Bus support" 849 depends on SH_DREAMCAST 850 help 851 The Maple Bus is SEGA's serial communication bus for peripherals 852 on the Dreamcast. Without this bus support you won't be able to 853 get your Dreamcast keyboard etc to work, so most users 854 probably want to say 'Y' here, unless you are only using the 855 Dreamcast with a serial line terminal or a remote network 856 connection. 857 858endmenu 859 860menu "Power management options (EXPERIMENTAL)" 861 862source "kernel/power/Kconfig" 863 864source "drivers/cpuidle/Kconfig" 865 866endmenu 867