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 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 HAVE_OPROFILE 14 select HAVE_ARCH_TRACEHOOK 15 select HAVE_PERF_EVENTS 16 select HAVE_DEBUG_BUGVERBOSE 17 select HAVE_FAST_GUP if MMU 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 select ARCH_HAS_GIGANTIC_PAGE 57 58 help 59 The SuperH is a RISC processor targeted for use in embedded systems 60 and consumer electronics; it was also used in the Sega Dreamcast 61 gaming console. The SuperH port has a home page at 62 <http://www.linux-sh.org/>. 63 64config SUPERH32 65 def_bool "$(ARCH)" = "sh" 66 select ARCH_32BIT_OFF_T 67 select GUP_GET_PTE_LOW_HIGH if X2TLB 68 select HAVE_KPROBES 69 select HAVE_KRETPROBES 70 select HAVE_IOREMAP_PROT if MMU && !X2TLB 71 select HAVE_FUNCTION_TRACER 72 select HAVE_FTRACE_MCOUNT_RECORD 73 select HAVE_DYNAMIC_FTRACE 74 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 75 select ARCH_WANT_IPC_PARSE_VERSION 76 select HAVE_FUNCTION_GRAPH_TRACER 77 select HAVE_ARCH_KGDB 78 select HAVE_HW_BREAKPOINT 79 select HAVE_MIXED_BREAKPOINTS_REGS 80 select PERF_EVENTS 81 select ARCH_HIBERNATION_POSSIBLE if MMU 82 select SPARSE_IRQ 83 select HAVE_STACKPROTECTOR 84 85config SUPERH64 86 def_bool "$(ARCH)" = "sh64" 87 select HAVE_EXIT_THREAD 88 select KALLSYMS 89 90config GENERIC_BUG 91 def_bool y 92 depends on BUG && SUPERH32 93 94config GENERIC_CSUM 95 def_bool y 96 depends on SUPERH64 97 98config GENERIC_HWEIGHT 99 def_bool y 100 101config GENERIC_CALIBRATE_DELAY 102 bool 103 104config GENERIC_LOCKBREAK 105 def_bool y 106 depends on SMP && PREEMPTION 107 108config ARCH_SUSPEND_POSSIBLE 109 def_bool n 110 111config ARCH_HIBERNATION_POSSIBLE 112 def_bool n 113 114config SYS_SUPPORTS_APM_EMULATION 115 bool 116 select ARCH_SUSPEND_POSSIBLE 117 118config SYS_SUPPORTS_HUGETLBFS 119 bool 120 121config SYS_SUPPORTS_SMP 122 bool 123 124config SYS_SUPPORTS_NUMA 125 bool 126 127config STACKTRACE_SUPPORT 128 def_bool y 129 130config LOCKDEP_SUPPORT 131 def_bool y 132 133config ARCH_HAS_ILOG2_U32 134 def_bool n 135 136config ARCH_HAS_ILOG2_U64 137 def_bool n 138 139config NO_IOPORT_MAP 140 def_bool !PCI 141 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 142 !SH_HP6XX && !SH_SOLUTION_ENGINE 143 144config IO_TRAPPED 145 bool 146 147config SWAP_IO_SPACE 148 bool 149 150config DMA_COHERENT 151 bool 152 153config DMA_NONCOHERENT 154 def_bool !DMA_COHERENT 155 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 156 157config PGTABLE_LEVELS 158 default 3 if X2TLB 159 default 2 160 161menu "System type" 162 163# 164# Processor families 165# 166config CPU_SH2 167 bool 168 select SH_INTC 169 170config CPU_SH2A 171 bool 172 select CPU_SH2 173 select UNCACHED_MAPPING 174 175config CPU_J2 176 bool 177 select CPU_SH2 178 select OF 179 select OF_EARLY_FLATTREE 180 181config CPU_SH3 182 bool 183 select CPU_HAS_INTEVT 184 select CPU_HAS_SR_RB 185 select SH_INTC 186 select SYS_SUPPORTS_SH_TMU 187 188config CPU_SH4 189 bool 190 select CPU_HAS_INTEVT 191 select CPU_HAS_SR_RB 192 select CPU_HAS_FPU if !CPU_SH4AL_DSP 193 select SH_INTC 194 select SYS_SUPPORTS_SH_TMU 195 select SYS_SUPPORTS_HUGETLBFS if MMU 196 197config CPU_SH4A 198 bool 199 select CPU_SH4 200 201config CPU_SH4AL_DSP 202 bool 203 select CPU_SH4A 204 select CPU_HAS_DSP 205 206config CPU_SH5 207 bool 208 select CPU_HAS_FPU 209 select SYS_SUPPORTS_SH_TMU 210 select SYS_SUPPORTS_HUGETLBFS if MMU 211 212config CPU_SHX2 213 bool 214 215config CPU_SHX3 216 bool 217 select DMA_COHERENT 218 select SYS_SUPPORTS_SMP 219 select SYS_SUPPORTS_NUMA 220 221config ARCH_SHMOBILE 222 bool 223 select ARCH_SUSPEND_POSSIBLE 224 select PM 225 226config CPU_HAS_PMU 227 depends on CPU_SH4 || CPU_SH4A 228 default y 229 bool 230 231if SUPERH32 232 233choice 234 prompt "Processor sub-type selection" 235 236# 237# Processor subtypes 238# 239 240# SH-2 Processor Support 241 242config CPU_SUBTYPE_SH7619 243 bool "Support SH7619 processor" 244 select CPU_SH2 245 select SYS_SUPPORTS_SH_CMT 246 247config CPU_SUBTYPE_J2 248 bool "Support J2 processor" 249 select CPU_J2 250 select SYS_SUPPORTS_SMP 251 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 252 253# SH-2A Processor Support 254 255config CPU_SUBTYPE_SH7201 256 bool "Support SH7201 processor" 257 select CPU_SH2A 258 select CPU_HAS_FPU 259 select SYS_SUPPORTS_SH_MTU2 260 261config CPU_SUBTYPE_SH7203 262 bool "Support SH7203 processor" 263 select CPU_SH2A 264 select CPU_HAS_FPU 265 select SYS_SUPPORTS_SH_CMT 266 select SYS_SUPPORTS_SH_MTU2 267 select PINCTRL 268 269config CPU_SUBTYPE_SH7206 270 bool "Support SH7206 processor" 271 select CPU_SH2A 272 select SYS_SUPPORTS_SH_CMT 273 select SYS_SUPPORTS_SH_MTU2 274 275config CPU_SUBTYPE_SH7263 276 bool "Support SH7263 processor" 277 select CPU_SH2A 278 select CPU_HAS_FPU 279 select SYS_SUPPORTS_SH_CMT 280 select SYS_SUPPORTS_SH_MTU2 281 282config CPU_SUBTYPE_SH7264 283 bool "Support SH7264 processor" 284 select CPU_SH2A 285 select CPU_HAS_FPU 286 select SYS_SUPPORTS_SH_CMT 287 select SYS_SUPPORTS_SH_MTU2 288 select PINCTRL 289 290config CPU_SUBTYPE_SH7269 291 bool "Support SH7269 processor" 292 select CPU_SH2A 293 select CPU_HAS_FPU 294 select SYS_SUPPORTS_SH_CMT 295 select SYS_SUPPORTS_SH_MTU2 296 select PINCTRL 297 298config CPU_SUBTYPE_MXG 299 bool "Support MX-G processor" 300 select CPU_SH2A 301 select SYS_SUPPORTS_SH_MTU2 302 help 303 Select MX-G if running on an R8A03022BG part. 304 305# SH-3 Processor Support 306 307config CPU_SUBTYPE_SH7705 308 bool "Support SH7705 processor" 309 select CPU_SH3 310 311config CPU_SUBTYPE_SH7706 312 bool "Support SH7706 processor" 313 select CPU_SH3 314 help 315 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 316 317config CPU_SUBTYPE_SH7707 318 bool "Support SH7707 processor" 319 select CPU_SH3 320 help 321 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 322 323config CPU_SUBTYPE_SH7708 324 bool "Support SH7708 processor" 325 select CPU_SH3 326 help 327 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 328 if you have a 100 Mhz SH-3 HD6417708R CPU. 329 330config CPU_SUBTYPE_SH7709 331 bool "Support SH7709 processor" 332 select CPU_SH3 333 help 334 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 335 336config CPU_SUBTYPE_SH7710 337 bool "Support SH7710 processor" 338 select CPU_SH3 339 select CPU_HAS_DSP 340 help 341 Select SH7710 if you have a SH3-DSP SH7710 CPU. 342 343config CPU_SUBTYPE_SH7712 344 bool "Support SH7712 processor" 345 select CPU_SH3 346 select CPU_HAS_DSP 347 help 348 Select SH7712 if you have a SH3-DSP SH7712 CPU. 349 350config CPU_SUBTYPE_SH7720 351 bool "Support SH7720 processor" 352 select CPU_SH3 353 select CPU_HAS_DSP 354 select SYS_SUPPORTS_SH_CMT 355 select USB_OHCI_SH if USB_OHCI_HCD 356 select PINCTRL 357 help 358 Select SH7720 if you have a SH3-DSP SH7720 CPU. 359 360config CPU_SUBTYPE_SH7721 361 bool "Support SH7721 processor" 362 select CPU_SH3 363 select CPU_HAS_DSP 364 select SYS_SUPPORTS_SH_CMT 365 select USB_OHCI_SH if USB_OHCI_HCD 366 help 367 Select SH7721 if you have a SH3-DSP SH7721 CPU. 368 369# SH-4 Processor Support 370 371config CPU_SUBTYPE_SH7750 372 bool "Support SH7750 processor" 373 select CPU_SH4 374 help 375 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 376 377config CPU_SUBTYPE_SH7091 378 bool "Support SH7091 processor" 379 select CPU_SH4 380 help 381 Select SH7091 if you have an SH-4 based Sega device (such as 382 the Dreamcast, Naomi, and Naomi 2). 383 384config CPU_SUBTYPE_SH7750R 385 bool "Support SH7750R processor" 386 select CPU_SH4 387 388config CPU_SUBTYPE_SH7750S 389 bool "Support SH7750S processor" 390 select CPU_SH4 391 392config CPU_SUBTYPE_SH7751 393 bool "Support SH7751 processor" 394 select CPU_SH4 395 help 396 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 397 or if you have a HD6417751R CPU. 398 399config CPU_SUBTYPE_SH7751R 400 bool "Support SH7751R processor" 401 select CPU_SH4 402 403config CPU_SUBTYPE_SH7760 404 bool "Support SH7760 processor" 405 select CPU_SH4 406 407config CPU_SUBTYPE_SH4_202 408 bool "Support SH4-202 processor" 409 select CPU_SH4 410 411# SH-4A Processor Support 412 413config CPU_SUBTYPE_SH7723 414 bool "Support SH7723 processor" 415 select CPU_SH4A 416 select CPU_SHX2 417 select ARCH_SHMOBILE 418 select ARCH_SPARSEMEM_ENABLE 419 select SYS_SUPPORTS_SH_CMT 420 select PINCTRL 421 help 422 Select SH7723 if you have an SH-MobileR2 CPU. 423 424config CPU_SUBTYPE_SH7724 425 bool "Support SH7724 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 SH7724 if you have an SH-MobileR2R CPU. 434 435config CPU_SUBTYPE_SH7734 436 bool "Support SH7734 processor" 437 select CPU_SH4A 438 select CPU_SHX2 439 select PINCTRL 440 help 441 Select SH7734 if you have a SH4A SH7734 CPU. 442 443config CPU_SUBTYPE_SH7757 444 bool "Support SH7757 processor" 445 select CPU_SH4A 446 select CPU_SHX2 447 select PINCTRL 448 help 449 Select SH7757 if you have a SH4A SH7757 CPU. 450 451config CPU_SUBTYPE_SH7763 452 bool "Support SH7763 processor" 453 select CPU_SH4A 454 select USB_OHCI_SH if USB_OHCI_HCD 455 help 456 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 457 458config CPU_SUBTYPE_SH7770 459 bool "Support SH7770 processor" 460 select CPU_SH4A 461 462config CPU_SUBTYPE_SH7780 463 bool "Support SH7780 processor" 464 select CPU_SH4A 465 466config CPU_SUBTYPE_SH7785 467 bool "Support SH7785 processor" 468 select CPU_SH4A 469 select CPU_SHX2 470 select ARCH_SPARSEMEM_ENABLE 471 select SYS_SUPPORTS_NUMA 472 select PINCTRL 473 474config CPU_SUBTYPE_SH7786 475 bool "Support SH7786 processor" 476 select CPU_SH4A 477 select CPU_SHX3 478 select CPU_HAS_PTEAEX 479 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 480 select USB_OHCI_SH if USB_OHCI_HCD 481 select USB_EHCI_SH if USB_EHCI_HCD 482 select PINCTRL 483 484config CPU_SUBTYPE_SHX3 485 bool "Support SH-X3 processor" 486 select CPU_SH4A 487 select CPU_SHX3 488 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 489 select GPIOLIB 490 select PINCTRL 491 492# SH4AL-DSP Processor Support 493 494config CPU_SUBTYPE_SH7343 495 bool "Support SH7343 processor" 496 select CPU_SH4AL_DSP 497 select ARCH_SHMOBILE 498 select SYS_SUPPORTS_SH_CMT 499 500config CPU_SUBTYPE_SH7722 501 bool "Support SH7722 processor" 502 select CPU_SH4AL_DSP 503 select CPU_SHX2 504 select ARCH_SHMOBILE 505 select ARCH_SPARSEMEM_ENABLE 506 select SYS_SUPPORTS_NUMA 507 select SYS_SUPPORTS_SH_CMT 508 select PINCTRL 509 510config CPU_SUBTYPE_SH7366 511 bool "Support SH7366 processor" 512 select CPU_SH4AL_DSP 513 select CPU_SHX2 514 select ARCH_SHMOBILE 515 select ARCH_SPARSEMEM_ENABLE 516 select SYS_SUPPORTS_NUMA 517 select SYS_SUPPORTS_SH_CMT 518 519endchoice 520 521endif 522 523if SUPERH64 524 525choice 526 prompt "Processor sub-type selection" 527 528# SH-5 Processor Support 529 530config CPU_SUBTYPE_SH5_101 531 bool "Support SH5-101 processor" 532 select CPU_SH5 533 534config CPU_SUBTYPE_SH5_103 535 bool "Support SH5-103 processor" 536 select CPU_SH5 537 538endchoice 539 540endif 541 542source "arch/sh/mm/Kconfig" 543 544source "arch/sh/Kconfig.cpu" 545 546source "arch/sh/boards/Kconfig" 547 548menu "Timer and clock configuration" 549 550config SH_PCLK_FREQ 551 int "Peripheral clock frequency (in Hz)" 552 depends on SH_CLK_CPG_LEGACY 553 default "31250000" if CPU_SUBTYPE_SH7619 554 default "33333333" if CPU_SUBTYPE_SH7770 || \ 555 CPU_SUBTYPE_SH7760 || \ 556 CPU_SUBTYPE_SH7705 || \ 557 CPU_SUBTYPE_SH7203 || \ 558 CPU_SUBTYPE_SH7206 || \ 559 CPU_SUBTYPE_SH7263 || \ 560 CPU_SUBTYPE_MXG 561 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 562 default "66000000" if CPU_SUBTYPE_SH4_202 563 default "50000000" 564 help 565 This option is used to specify the peripheral clock frequency. 566 This is necessary for determining the reference clock value on 567 platforms lacking an RTC. 568 569config SH_CLK_CPG 570 def_bool y 571 572config SH_CLK_CPG_LEGACY 573 depends on SH_CLK_CPG 574 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 575 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 576 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 577 !CPU_SUBTYPE_SH7269 578 579endmenu 580 581menu "CPU Frequency scaling" 582source "drivers/cpufreq/Kconfig" 583endmenu 584 585source "arch/sh/drivers/Kconfig" 586 587endmenu 588 589menu "Kernel features" 590 591source "kernel/Kconfig.hz" 592 593config KEXEC 594 bool "kexec system call (EXPERIMENTAL)" 595 depends on SUPERH32 && MMU 596 select KEXEC_CORE 597 help 598 kexec is a system call that implements the ability to shutdown your 599 current kernel, and to start another kernel. It is like a reboot 600 but it is independent of the system firmware. And like a reboot 601 you can start any kernel with it, not just Linux. 602 603 The name comes from the similarity to the exec system call. 604 605 It is an ongoing process to be certain the hardware in a machine 606 is properly shutdown, so do not be surprised if this code does not 607 initially work for you. As of this writing the exact hardware 608 interface is strongly in flux, so no good recommendation can be 609 made. 610 611config CRASH_DUMP 612 bool "kernel crash dumps (EXPERIMENTAL)" 613 depends on SUPERH32 && BROKEN_ON_SMP 614 help 615 Generate crash dump after being started by kexec. 616 This should be normally only set in special crash dump kernels 617 which are loaded in the main kernel with kexec-tools into 618 a specially reserved region and then later executed after 619 a crash by kdump/kexec. The crash dump kernel must be compiled 620 to a memory address not used by the main kernel using 621 PHYSICAL_START. 622 623 For more details see Documentation/admin-guide/kdump/kdump.rst 624 625config KEXEC_JUMP 626 bool "kexec jump (EXPERIMENTAL)" 627 depends on SUPERH32 && KEXEC && HIBERNATION 628 help 629 Jump between original kernel and kexeced kernel and invoke 630 code via KEXEC 631 632config PHYSICAL_START 633 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 634 default MEMORY_START 635 ---help--- 636 This gives the physical address where the kernel is loaded 637 and is ordinarily the same as MEMORY_START. 638 639 Different values are primarily used in the case of kexec on panic 640 where the fail safe kernel needs to run at a different address 641 than the panic-ed kernel. 642 643config SECCOMP 644 bool "Enable seccomp to safely compute untrusted bytecode" 645 depends on PROC_FS 646 help 647 This kernel feature is useful for number crunching applications 648 that may need to compute untrusted bytecode during their 649 execution. By using pipes or other transports made available to 650 the process as file descriptors supporting the read/write 651 syscalls, it's possible to isolate those applications in 652 their own address space using seccomp. Once seccomp is 653 enabled via prctl, it cannot be disabled and the task is only 654 allowed to execute a few safe syscalls defined by each seccomp 655 mode. 656 657 If unsure, say N. 658 659config SMP 660 bool "Symmetric multi-processing support" 661 depends on SYS_SUPPORTS_SMP 662 ---help--- 663 This enables support for systems with more than one CPU. If you have 664 a system with only one CPU, say N. If you have a system with more 665 than one CPU, say Y. 666 667 If you say N here, the kernel will run on uni- and multiprocessor 668 machines, but will use only one CPU of a multiprocessor machine. If 669 you say Y here, the kernel will run on many, but not all, 670 uniprocessor machines. On a uniprocessor machine, the kernel 671 will run faster if you say N here. 672 673 People using multiprocessor machines who say Y here should also say 674 Y to "Enhanced Real Time Clock Support", below. 675 676 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 677 available at <http://www.tldp.org/docs.html#howto>. 678 679 If you don't know what to do here, say N. 680 681config NR_CPUS 682 int "Maximum number of CPUs (2-32)" 683 range 2 32 684 depends on SMP 685 default "4" if CPU_SUBTYPE_SHX3 686 default "2" 687 help 688 This allows you to specify the maximum number of CPUs which this 689 kernel will support. The maximum supported value is 32 and the 690 minimum value which makes sense is 2. 691 692 This is purely to save memory - each supported CPU adds 693 approximately eight kilobytes to the kernel image. 694 695config HOTPLUG_CPU 696 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 697 depends on SMP 698 help 699 Say Y here to experiment with turning CPUs off and on. CPUs 700 can be controlled through /sys/devices/system/cpu. 701 702config GUSA 703 def_bool y 704 depends on !SMP && SUPERH32 705 help 706 This enables support for gUSA (general UserSpace Atomicity). 707 This is the default implementation for both UP and non-ll/sc 708 CPUs, and is used by the libc, amongst others. 709 710 For additional information, design information can be found 711 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 712 713 This should only be disabled for special cases where alternate 714 atomicity implementations exist. 715 716config GUSA_RB 717 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 718 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 719 help 720 Enabling this option will allow the kernel to implement some 721 atomic operations using a software implementation of load-locked/ 722 store-conditional (LLSC). On machines which do not have hardware 723 LLSC, this should be more efficient than the other alternative of 724 disabling interrupts around the atomic sequence. 725 726config HW_PERF_EVENTS 727 bool "Enable hardware performance counter support for perf events" 728 depends on PERF_EVENTS && CPU_HAS_PMU 729 default y 730 help 731 Enable hardware performance counter support for perf events. If 732 disabled, perf events will use software events only. 733 734source "drivers/sh/Kconfig" 735 736endmenu 737 738menu "Boot options" 739 740config USE_BUILTIN_DTB 741 bool "Use builtin DTB" 742 default n 743 depends on SH_DEVICE_TREE 744 help 745 Link a device tree blob for particular hardware into the kernel, 746 suppressing use of the DTB pointer provided by the bootloader. 747 This option should only be used with legacy bootloaders that are 748 not capable of providing a DTB to the kernel, or for experimental 749 hardware without stable device tree bindings. 750 751config BUILTIN_DTB_SOURCE 752 string "Source file for builtin DTB" 753 default "" 754 depends on USE_BUILTIN_DTB 755 help 756 Base name (without suffix, relative to arch/sh/boot/dts) for the 757 a DTS file that will be used to produce the DTB linked into the 758 kernel. 759 760config ZERO_PAGE_OFFSET 761 hex 762 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 763 SH_7751_SOLUTION_ENGINE 764 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 765 default "0x00002000" if PAGE_SIZE_8KB 766 default "0x00001000" 767 help 768 This sets the default offset of zero page. 769 770config BOOT_LINK_OFFSET 771 hex 772 default "0x00210000" if SH_SHMIN 773 default "0x00400000" if SH_CAYMAN 774 default "0x00810000" if SH_7780_SOLUTION_ENGINE 775 default "0x009e0000" if SH_TITAN 776 default "0x01800000" if SH_SDK7780 777 default "0x02000000" if SH_EDOSK7760 778 default "0x00800000" 779 help 780 This option allows you to set the link address offset of the zImage. 781 This can be useful if you are on a board which has a small amount of 782 memory. 783 784config ENTRY_OFFSET 785 hex 786 default "0x00001000" if PAGE_SIZE_4KB 787 default "0x00002000" if PAGE_SIZE_8KB 788 default "0x00004000" if PAGE_SIZE_16KB 789 default "0x00010000" if PAGE_SIZE_64KB 790 default "0x00000000" 791 792config ROMIMAGE_MMCIF 793 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 794 depends on CPU_SUBTYPE_SH7724 795 help 796 Say Y here to include experimental MMCIF loading code in 797 romImage. With this enabled it is possible to write the romImage 798 kernel image to an MMC card and boot the kernel straight from 799 the reset vector. At reset the processor Mask ROM will load the 800 first part of the romImage which in turn loads the rest the kernel 801 image to RAM using the MMCIF hardware block. 802 803choice 804 prompt "Kernel command line" 805 optional 806 default CMDLINE_OVERWRITE 807 help 808 Setting this option allows the kernel command line arguments 809 to be set. 810 811config CMDLINE_OVERWRITE 812 bool "Overwrite bootloader kernel arguments" 813 help 814 Given string will overwrite any arguments passed in by 815 a bootloader. 816 817config CMDLINE_EXTEND 818 bool "Extend bootloader kernel arguments" 819 help 820 Given string will be concatenated with arguments passed in 821 by a bootloader. 822 823endchoice 824 825config CMDLINE 826 string "Kernel command line arguments string" 827 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 828 default "console=ttySC1,115200" 829 830endmenu 831 832menu "Bus options" 833 834config SUPERHYWAY 835 tristate "SuperHyway Bus support" 836 depends on CPU_SUBTYPE_SH4_202 837 838config MAPLE 839 bool "Maple Bus support" 840 depends on SH_DREAMCAST 841 help 842 The Maple Bus is SEGA's serial communication bus for peripherals 843 on the Dreamcast. Without this bus support you won't be able to 844 get your Dreamcast keyboard etc to work, so most users 845 probably want to say 'Y' here, unless you are only using the 846 Dreamcast with a serial line terminal or a remote network 847 connection. 848 849endmenu 850 851menu "Power management options (EXPERIMENTAL)" 852 853source "kernel/power/Kconfig" 854 855source "drivers/cpuidle/Kconfig" 856 857endmenu 858