Loading...
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 ARCH_DEFCONFIG
91 string
92 default "arch/sh/configs/shx3_defconfig" if SUPERH32
93 default "arch/sh/configs/cayman_defconfig" if SUPERH64
94
95config GENERIC_BUG
96 def_bool y
97 depends on BUG && SUPERH32
98
99config GENERIC_CSUM
100 def_bool y
101 depends on SUPERH64
102
103config GENERIC_HWEIGHT
104 def_bool y
105
106config GENERIC_CALIBRATE_DELAY
107 bool
108
109config GENERIC_LOCKBREAK
110 def_bool y
111 depends on SMP && PREEMPT
112
113config ARCH_SUSPEND_POSSIBLE
114 def_bool n
115
116config ARCH_HIBERNATION_POSSIBLE
117 def_bool n
118
119config SYS_SUPPORTS_APM_EMULATION
120 bool
121 select ARCH_SUSPEND_POSSIBLE
122
123config SYS_SUPPORTS_HUGETLBFS
124 bool
125
126config SYS_SUPPORTS_SMP
127 bool
128
129config SYS_SUPPORTS_NUMA
130 bool
131
132config STACKTRACE_SUPPORT
133 def_bool y
134
135config LOCKDEP_SUPPORT
136 def_bool y
137
138config ARCH_HAS_ILOG2_U32
139 def_bool n
140
141config ARCH_HAS_ILOG2_U64
142 def_bool n
143
144config NO_IOPORT_MAP
145 def_bool !PCI
146 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
147 !SH_HP6XX && !SH_SOLUTION_ENGINE
148
149config IO_TRAPPED
150 bool
151
152config SWAP_IO_SPACE
153 bool
154
155config DMA_COHERENT
156 bool
157
158config DMA_NONCOHERENT
159 def_bool !DMA_COHERENT
160 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
161
162config PGTABLE_LEVELS
163 default 3 if X2TLB
164 default 2
165
166menu "System type"
167
168#
169# Processor families
170#
171config CPU_SH2
172 bool
173 select SH_INTC
174
175config CPU_SH2A
176 bool
177 select CPU_SH2
178 select UNCACHED_MAPPING
179
180config CPU_J2
181 bool
182 select CPU_SH2
183 select OF
184 select OF_EARLY_FLATTREE
185
186config CPU_SH3
187 bool
188 select CPU_HAS_INTEVT
189 select CPU_HAS_SR_RB
190 select SH_INTC
191 select SYS_SUPPORTS_SH_TMU
192
193config CPU_SH4
194 bool
195 select CPU_HAS_INTEVT
196 select CPU_HAS_SR_RB
197 select CPU_HAS_FPU if !CPU_SH4AL_DSP
198 select SH_INTC
199 select SYS_SUPPORTS_SH_TMU
200 select SYS_SUPPORTS_HUGETLBFS if MMU
201
202config CPU_SH4A
203 bool
204 select CPU_SH4
205
206config CPU_SH4AL_DSP
207 bool
208 select CPU_SH4A
209 select CPU_HAS_DSP
210
211config CPU_SH5
212 bool
213 select CPU_HAS_FPU
214 select SYS_SUPPORTS_SH_TMU
215 select SYS_SUPPORTS_HUGETLBFS if MMU
216
217config CPU_SHX2
218 bool
219
220config CPU_SHX3
221 bool
222 select DMA_COHERENT
223 select SYS_SUPPORTS_SMP
224 select SYS_SUPPORTS_NUMA
225
226config ARCH_SHMOBILE
227 bool
228 select ARCH_SUSPEND_POSSIBLE
229 select PM
230
231config CPU_HAS_PMU
232 depends on CPU_SH4 || CPU_SH4A
233 default y
234 bool
235
236if SUPERH32
237
238choice
239 prompt "Processor sub-type selection"
240
241#
242# Processor subtypes
243#
244
245# SH-2 Processor Support
246
247config CPU_SUBTYPE_SH7619
248 bool "Support SH7619 processor"
249 select CPU_SH2
250 select SYS_SUPPORTS_SH_CMT
251
252config CPU_SUBTYPE_J2
253 bool "Support J2 processor"
254 select CPU_J2
255 select SYS_SUPPORTS_SMP
256 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
257
258# SH-2A Processor Support
259
260config CPU_SUBTYPE_SH7201
261 bool "Support SH7201 processor"
262 select CPU_SH2A
263 select CPU_HAS_FPU
264 select SYS_SUPPORTS_SH_MTU2
265
266config CPU_SUBTYPE_SH7203
267 bool "Support SH7203 processor"
268 select CPU_SH2A
269 select CPU_HAS_FPU
270 select SYS_SUPPORTS_SH_CMT
271 select SYS_SUPPORTS_SH_MTU2
272 select PINCTRL
273
274config CPU_SUBTYPE_SH7206
275 bool "Support SH7206 processor"
276 select CPU_SH2A
277 select SYS_SUPPORTS_SH_CMT
278 select SYS_SUPPORTS_SH_MTU2
279
280config CPU_SUBTYPE_SH7263
281 bool "Support SH7263 processor"
282 select CPU_SH2A
283 select CPU_HAS_FPU
284 select SYS_SUPPORTS_SH_CMT
285 select SYS_SUPPORTS_SH_MTU2
286
287config CPU_SUBTYPE_SH7264
288 bool "Support SH7264 processor"
289 select CPU_SH2A
290 select CPU_HAS_FPU
291 select SYS_SUPPORTS_SH_CMT
292 select SYS_SUPPORTS_SH_MTU2
293 select PINCTRL
294
295config CPU_SUBTYPE_SH7269
296 bool "Support SH7269 processor"
297 select CPU_SH2A
298 select CPU_HAS_FPU
299 select SYS_SUPPORTS_SH_CMT
300 select SYS_SUPPORTS_SH_MTU2
301 select PINCTRL
302
303config CPU_SUBTYPE_MXG
304 bool "Support MX-G processor"
305 select CPU_SH2A
306 select SYS_SUPPORTS_SH_MTU2
307 help
308 Select MX-G if running on an R8A03022BG part.
309
310# SH-3 Processor Support
311
312config CPU_SUBTYPE_SH7705
313 bool "Support SH7705 processor"
314 select CPU_SH3
315
316config CPU_SUBTYPE_SH7706
317 bool "Support SH7706 processor"
318 select CPU_SH3
319 help
320 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
321
322config CPU_SUBTYPE_SH7707
323 bool "Support SH7707 processor"
324 select CPU_SH3
325 help
326 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
327
328config CPU_SUBTYPE_SH7708
329 bool "Support SH7708 processor"
330 select CPU_SH3
331 help
332 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
333 if you have a 100 Mhz SH-3 HD6417708R CPU.
334
335config CPU_SUBTYPE_SH7709
336 bool "Support SH7709 processor"
337 select CPU_SH3
338 help
339 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
340
341config CPU_SUBTYPE_SH7710
342 bool "Support SH7710 processor"
343 select CPU_SH3
344 select CPU_HAS_DSP
345 help
346 Select SH7710 if you have a SH3-DSP SH7710 CPU.
347
348config CPU_SUBTYPE_SH7712
349 bool "Support SH7712 processor"
350 select CPU_SH3
351 select CPU_HAS_DSP
352 help
353 Select SH7712 if you have a SH3-DSP SH7712 CPU.
354
355config CPU_SUBTYPE_SH7720
356 bool "Support SH7720 processor"
357 select CPU_SH3
358 select CPU_HAS_DSP
359 select SYS_SUPPORTS_SH_CMT
360 select USB_OHCI_SH if USB_OHCI_HCD
361 select PINCTRL
362 help
363 Select SH7720 if you have a SH3-DSP SH7720 CPU.
364
365config CPU_SUBTYPE_SH7721
366 bool "Support SH7721 processor"
367 select CPU_SH3
368 select CPU_HAS_DSP
369 select SYS_SUPPORTS_SH_CMT
370 select USB_OHCI_SH if USB_OHCI_HCD
371 help
372 Select SH7721 if you have a SH3-DSP SH7721 CPU.
373
374# SH-4 Processor Support
375
376config CPU_SUBTYPE_SH7750
377 bool "Support SH7750 processor"
378 select CPU_SH4
379 help
380 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
381
382config CPU_SUBTYPE_SH7091
383 bool "Support SH7091 processor"
384 select CPU_SH4
385 help
386 Select SH7091 if you have an SH-4 based Sega device (such as
387 the Dreamcast, Naomi, and Naomi 2).
388
389config CPU_SUBTYPE_SH7750R
390 bool "Support SH7750R processor"
391 select CPU_SH4
392
393config CPU_SUBTYPE_SH7750S
394 bool "Support SH7750S processor"
395 select CPU_SH4
396
397config CPU_SUBTYPE_SH7751
398 bool "Support SH7751 processor"
399 select CPU_SH4
400 help
401 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
402 or if you have a HD6417751R CPU.
403
404config CPU_SUBTYPE_SH7751R
405 bool "Support SH7751R processor"
406 select CPU_SH4
407
408config CPU_SUBTYPE_SH7760
409 bool "Support SH7760 processor"
410 select CPU_SH4
411
412config CPU_SUBTYPE_SH4_202
413 bool "Support SH4-202 processor"
414 select CPU_SH4
415
416# SH-4A Processor Support
417
418config CPU_SUBTYPE_SH7723
419 bool "Support SH7723 processor"
420 select CPU_SH4A
421 select CPU_SHX2
422 select ARCH_SHMOBILE
423 select ARCH_SPARSEMEM_ENABLE
424 select SYS_SUPPORTS_SH_CMT
425 select PINCTRL
426 help
427 Select SH7723 if you have an SH-MobileR2 CPU.
428
429config CPU_SUBTYPE_SH7724
430 bool "Support SH7724 processor"
431 select CPU_SH4A
432 select CPU_SHX2
433 select ARCH_SHMOBILE
434 select ARCH_SPARSEMEM_ENABLE
435 select SYS_SUPPORTS_SH_CMT
436 select PINCTRL
437 help
438 Select SH7724 if you have an SH-MobileR2R CPU.
439
440config CPU_SUBTYPE_SH7734
441 bool "Support SH7734 processor"
442 select CPU_SH4A
443 select CPU_SHX2
444 select PINCTRL
445 help
446 Select SH7734 if you have a SH4A SH7734 CPU.
447
448config CPU_SUBTYPE_SH7757
449 bool "Support SH7757 processor"
450 select CPU_SH4A
451 select CPU_SHX2
452 select PINCTRL
453 help
454 Select SH7757 if you have a SH4A SH7757 CPU.
455
456config CPU_SUBTYPE_SH7763
457 bool "Support SH7763 processor"
458 select CPU_SH4A
459 select USB_OHCI_SH if USB_OHCI_HCD
460 help
461 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
462
463config CPU_SUBTYPE_SH7770
464 bool "Support SH7770 processor"
465 select CPU_SH4A
466
467config CPU_SUBTYPE_SH7780
468 bool "Support SH7780 processor"
469 select CPU_SH4A
470
471config CPU_SUBTYPE_SH7785
472 bool "Support SH7785 processor"
473 select CPU_SH4A
474 select CPU_SHX2
475 select ARCH_SPARSEMEM_ENABLE
476 select SYS_SUPPORTS_NUMA
477 select PINCTRL
478
479config CPU_SUBTYPE_SH7786
480 bool "Support SH7786 processor"
481 select CPU_SH4A
482 select CPU_SHX3
483 select CPU_HAS_PTEAEX
484 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
485 select USB_OHCI_SH if USB_OHCI_HCD
486 select USB_EHCI_SH if USB_EHCI_HCD
487 select PINCTRL
488
489config CPU_SUBTYPE_SHX3
490 bool "Support SH-X3 processor"
491 select CPU_SH4A
492 select CPU_SHX3
493 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
494 select GPIOLIB
495 select PINCTRL
496
497# SH4AL-DSP Processor Support
498
499config CPU_SUBTYPE_SH7343
500 bool "Support SH7343 processor"
501 select CPU_SH4AL_DSP
502 select ARCH_SHMOBILE
503 select SYS_SUPPORTS_SH_CMT
504
505config CPU_SUBTYPE_SH7722
506 bool "Support SH7722 processor"
507 select CPU_SH4AL_DSP
508 select CPU_SHX2
509 select ARCH_SHMOBILE
510 select ARCH_SPARSEMEM_ENABLE
511 select SYS_SUPPORTS_NUMA
512 select SYS_SUPPORTS_SH_CMT
513 select PINCTRL
514
515config CPU_SUBTYPE_SH7366
516 bool "Support SH7366 processor"
517 select CPU_SH4AL_DSP
518 select CPU_SHX2
519 select ARCH_SHMOBILE
520 select ARCH_SPARSEMEM_ENABLE
521 select SYS_SUPPORTS_NUMA
522 select SYS_SUPPORTS_SH_CMT
523
524endchoice
525
526endif
527
528if SUPERH64
529
530choice
531 prompt "Processor sub-type selection"
532
533# SH-5 Processor Support
534
535config CPU_SUBTYPE_SH5_101
536 bool "Support SH5-101 processor"
537 select CPU_SH5
538
539config CPU_SUBTYPE_SH5_103
540 bool "Support SH5-103 processor"
541 select CPU_SH5
542
543endchoice
544
545endif
546
547source "arch/sh/mm/Kconfig"
548
549source "arch/sh/Kconfig.cpu"
550
551source "arch/sh/boards/Kconfig"
552
553menu "Timer and clock configuration"
554
555config SH_PCLK_FREQ
556 int "Peripheral clock frequency (in Hz)"
557 depends on SH_CLK_CPG_LEGACY
558 default "31250000" if CPU_SUBTYPE_SH7619
559 default "33333333" if CPU_SUBTYPE_SH7770 || \
560 CPU_SUBTYPE_SH7760 || \
561 CPU_SUBTYPE_SH7705 || \
562 CPU_SUBTYPE_SH7203 || \
563 CPU_SUBTYPE_SH7206 || \
564 CPU_SUBTYPE_SH7263 || \
565 CPU_SUBTYPE_MXG
566 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
567 default "66000000" if CPU_SUBTYPE_SH4_202
568 default "50000000"
569 help
570 This option is used to specify the peripheral clock frequency.
571 This is necessary for determining the reference clock value on
572 platforms lacking an RTC.
573
574config SH_CLK_CPG
575 def_bool y
576
577config SH_CLK_CPG_LEGACY
578 depends on SH_CLK_CPG
579 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
580 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
581 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
582 !CPU_SUBTYPE_SH7269
583
584endmenu
585
586menu "CPU Frequency scaling"
587source "drivers/cpufreq/Kconfig"
588endmenu
589
590source "arch/sh/drivers/Kconfig"
591
592endmenu
593
594menu "Kernel features"
595
596source "kernel/Kconfig.hz"
597
598config KEXEC
599 bool "kexec system call (EXPERIMENTAL)"
600 depends on SUPERH32 && MMU
601 select KEXEC_CORE
602 help
603 kexec is a system call that implements the ability to shutdown your
604 current kernel, and to start another kernel. It is like a reboot
605 but it is independent of the system firmware. And like a reboot
606 you can start any kernel with it, not just Linux.
607
608 The name comes from the similarity to the exec system call.
609
610 It is an ongoing process to be certain the hardware in a machine
611 is properly shutdown, so do not be surprised if this code does not
612 initially work for you. As of this writing the exact hardware
613 interface is strongly in flux, so no good recommendation can be
614 made.
615
616config CRASH_DUMP
617 bool "kernel crash dumps (EXPERIMENTAL)"
618 depends on SUPERH32 && BROKEN_ON_SMP
619 help
620 Generate crash dump after being started by kexec.
621 This should be normally only set in special crash dump kernels
622 which are loaded in the main kernel with kexec-tools into
623 a specially reserved region and then later executed after
624 a crash by kdump/kexec. The crash dump kernel must be compiled
625 to a memory address not used by the main kernel using
626 PHYSICAL_START.
627
628 For more details see Documentation/admin-guide/kdump/kdump.rst
629
630config KEXEC_JUMP
631 bool "kexec jump (EXPERIMENTAL)"
632 depends on SUPERH32 && KEXEC && HIBERNATION
633 help
634 Jump between original kernel and kexeced kernel and invoke
635 code via KEXEC
636
637config PHYSICAL_START
638 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
639 default MEMORY_START
640 ---help---
641 This gives the physical address where the kernel is loaded
642 and is ordinarily the same as MEMORY_START.
643
644 Different values are primarily used in the case of kexec on panic
645 where the fail safe kernel needs to run at a different address
646 than the panic-ed kernel.
647
648config SECCOMP
649 bool "Enable seccomp to safely compute untrusted bytecode"
650 depends on PROC_FS
651 help
652 This kernel feature is useful for number crunching applications
653 that may need to compute untrusted bytecode during their
654 execution. By using pipes or other transports made available to
655 the process as file descriptors supporting the read/write
656 syscalls, it's possible to isolate those applications in
657 their own address space using seccomp. Once seccomp is
658 enabled via prctl, it cannot be disabled and the task is only
659 allowed to execute a few safe syscalls defined by each seccomp
660 mode.
661
662 If unsure, say N.
663
664config SMP
665 bool "Symmetric multi-processing support"
666 depends on SYS_SUPPORTS_SMP
667 ---help---
668 This enables support for systems with more than one CPU. If you have
669 a system with only one CPU, say N. If you have a system with more
670 than one CPU, say Y.
671
672 If you say N here, the kernel will run on uni- and multiprocessor
673 machines, but will use only one CPU of a multiprocessor machine. If
674 you say Y here, the kernel will run on many, but not all,
675 uniprocessor machines. On a uniprocessor machine, the kernel
676 will run faster if you say N here.
677
678 People using multiprocessor machines who say Y here should also say
679 Y to "Enhanced Real Time Clock Support", below.
680
681 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
682 available at <http://www.tldp.org/docs.html#howto>.
683
684 If you don't know what to do here, say N.
685
686config NR_CPUS
687 int "Maximum number of CPUs (2-32)"
688 range 2 32
689 depends on SMP
690 default "4" if CPU_SUBTYPE_SHX3
691 default "2"
692 help
693 This allows you to specify the maximum number of CPUs which this
694 kernel will support. The maximum supported value is 32 and the
695 minimum value which makes sense is 2.
696
697 This is purely to save memory - each supported CPU adds
698 approximately eight kilobytes to the kernel image.
699
700config HOTPLUG_CPU
701 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
702 depends on SMP
703 help
704 Say Y here to experiment with turning CPUs off and on. CPUs
705 can be controlled through /sys/devices/system/cpu.
706
707config GUSA
708 def_bool y
709 depends on !SMP && SUPERH32
710 help
711 This enables support for gUSA (general UserSpace Atomicity).
712 This is the default implementation for both UP and non-ll/sc
713 CPUs, and is used by the libc, amongst others.
714
715 For additional information, design information can be found
716 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
717
718 This should only be disabled for special cases where alternate
719 atomicity implementations exist.
720
721config GUSA_RB
722 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
723 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
724 help
725 Enabling this option will allow the kernel to implement some
726 atomic operations using a software implementation of load-locked/
727 store-conditional (LLSC). On machines which do not have hardware
728 LLSC, this should be more efficient than the other alternative of
729 disabling interrupts around the atomic sequence.
730
731config HW_PERF_EVENTS
732 bool "Enable hardware performance counter support for perf events"
733 depends on PERF_EVENTS && CPU_HAS_PMU
734 default y
735 help
736 Enable hardware performance counter support for perf events. If
737 disabled, perf events will use software events only.
738
739source "drivers/sh/Kconfig"
740
741endmenu
742
743menu "Boot options"
744
745config USE_BUILTIN_DTB
746 bool "Use builtin DTB"
747 default n
748 depends on SH_DEVICE_TREE
749 help
750 Link a device tree blob for particular hardware into the kernel,
751 suppressing use of the DTB pointer provided by the bootloader.
752 This option should only be used with legacy bootloaders that are
753 not capable of providing a DTB to the kernel, or for experimental
754 hardware without stable device tree bindings.
755
756config BUILTIN_DTB_SOURCE
757 string "Source file for builtin DTB"
758 default ""
759 depends on USE_BUILTIN_DTB
760 help
761 Base name (without suffix, relative to arch/sh/boot/dts) for the
762 a DTS file that will be used to produce the DTB linked into the
763 kernel.
764
765config ZERO_PAGE_OFFSET
766 hex
767 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
768 SH_7751_SOLUTION_ENGINE
769 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
770 default "0x00002000" if PAGE_SIZE_8KB
771 default "0x00001000"
772 help
773 This sets the default offset of zero page.
774
775config BOOT_LINK_OFFSET
776 hex
777 default "0x00210000" if SH_SHMIN
778 default "0x00400000" if SH_CAYMAN
779 default "0x00810000" if SH_7780_SOLUTION_ENGINE
780 default "0x009e0000" if SH_TITAN
781 default "0x01800000" if SH_SDK7780
782 default "0x02000000" if SH_EDOSK7760
783 default "0x00800000"
784 help
785 This option allows you to set the link address offset of the zImage.
786 This can be useful if you are on a board which has a small amount of
787 memory.
788
789config ENTRY_OFFSET
790 hex
791 default "0x00001000" if PAGE_SIZE_4KB
792 default "0x00002000" if PAGE_SIZE_8KB
793 default "0x00004000" if PAGE_SIZE_16KB
794 default "0x00010000" if PAGE_SIZE_64KB
795 default "0x00000000"
796
797config ROMIMAGE_MMCIF
798 bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
799 depends on CPU_SUBTYPE_SH7724
800 help
801 Say Y here to include experimental MMCIF loading code in
802 romImage. With this enabled it is possible to write the romImage
803 kernel image to an MMC card and boot the kernel straight from
804 the reset vector. At reset the processor Mask ROM will load the
805 first part of the romImage which in turn loads the rest the kernel
806 image to RAM using the MMCIF hardware block.
807
808choice
809 prompt "Kernel command line"
810 optional
811 default CMDLINE_OVERWRITE
812 help
813 Setting this option allows the kernel command line arguments
814 to be set.
815
816config CMDLINE_OVERWRITE
817 bool "Overwrite bootloader kernel arguments"
818 help
819 Given string will overwrite any arguments passed in by
820 a bootloader.
821
822config CMDLINE_EXTEND
823 bool "Extend bootloader kernel arguments"
824 help
825 Given string will be concatenated with arguments passed in
826 by a bootloader.
827
828endchoice
829
830config CMDLINE
831 string "Kernel command line arguments string"
832 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
833 default "console=ttySC1,115200"
834
835endmenu
836
837menu "Bus options"
838
839config SUPERHYWAY
840 tristate "SuperHyway Bus support"
841 depends on CPU_SUBTYPE_SH4_202
842
843config MAPLE
844 bool "Maple Bus support"
845 depends on SH_DREAMCAST
846 help
847 The Maple Bus is SEGA's serial communication bus for peripherals
848 on the Dreamcast. Without this bus support you won't be able to
849 get your Dreamcast keyboard etc to work, so most users
850 probably want to say 'Y' here, unless you are only using the
851 Dreamcast with a serial line terminal or a remote network
852 connection.
853
854endmenu
855
856menu "Power management options (EXPERIMENTAL)"
857
858source "kernel/power/Kconfig"
859
860source "drivers/cpuidle/Kconfig"
861
862endmenu
1# SPDX-License-Identifier: GPL-2.0
2config SUPERH
3 def_bool y
4 select ARCH_32BIT_OFF_T
5 select ARCH_HAS_CPU_CACHE_ALIASING
6 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
7 select ARCH_HAS_BINFMT_FLAT if !MMU
8 select ARCH_HAS_CPU_FINALIZE_INIT
9 select ARCH_HAS_CURRENT_STACK_POINTER
10 select ARCH_HAS_GIGANTIC_PAGE
11 select ARCH_HAS_GCOV_PROFILE_ALL
12 select ARCH_HAS_PTE_SPECIAL
13 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
14 select ARCH_HIBERNATION_POSSIBLE if MMU
15 select ARCH_MIGHT_HAVE_PC_PARPORT
16 select ARCH_WANT_IPC_PARSE_VERSION
17 select ARCH_NEED_CMPXCHG_1_EMU
18 select CPU_NO_EFFICIENT_FFS
19 select DMA_DECLARE_COHERENT
20 select GENERIC_ATOMIC64
21 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
22 select GENERIC_IDLE_POLL_SETUP
23 select GENERIC_IRQ_SHOW
24 select GENERIC_LIB_ASHLDI3
25 select GENERIC_LIB_ASHRDI3
26 select GENERIC_LIB_LSHRDI3
27 select GENERIC_PCI_IOMAP if PCI
28 select GENERIC_SCHED_CLOCK
29 select GENERIC_SMP_IDLE_THREAD
30 select GUP_GET_PXX_LOW_HIGH if X2TLB
31 select HAS_IOPORT if HAS_IOPORT_MAP
32 select GENERIC_IOREMAP if MMU
33 select HAVE_ARCH_AUDITSYSCALL
34 select HAVE_ARCH_KGDB
35 select HAVE_ARCH_SECCOMP_FILTER
36 select HAVE_ARCH_TRACEHOOK
37 select HAVE_DEBUG_BUGVERBOSE
38 select HAVE_DEBUG_KMEMLEAK
39 select HAVE_DYNAMIC_FTRACE
40 select HAVE_GUP_FAST if MMU
41 select HAVE_FUNCTION_GRAPH_TRACER
42 select HAVE_FUNCTION_TRACER
43 select HAVE_FTRACE_MCOUNT_RECORD
44 select HAVE_HW_BREAKPOINT
45 select HAVE_IOREMAP_PROT if MMU && !X2TLB
46 select HAVE_KERNEL_BZIP2
47 select HAVE_KERNEL_GZIP
48 select HAVE_KERNEL_LZMA
49 select HAVE_KERNEL_LZO
50 select HAVE_KERNEL_XZ
51 select HAVE_KPROBES
52 select HAVE_KRETPROBES
53 select HAVE_MIXED_BREAKPOINTS_REGS
54 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
55 select HAVE_NMI
56 select HAVE_PATA_PLATFORM
57 select HAVE_PERF_EVENTS
58 select HAVE_REGS_AND_STACK_ACCESS_API
59 select HAVE_UID16
60 select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
61 select HAVE_STACKPROTECTOR
62 select HAVE_SYSCALL_TRACEPOINTS
63 select IRQ_FORCED_THREADING
64 select LOCK_MM_AND_FIND_VMA
65 select MODULES_USE_ELF_RELA
66 select NEED_SG_DMA_LENGTH
67 select NO_DMA if !MMU && !DMA_COHERENT
68 select NO_GENERIC_PCI_IOPORT_MAP if PCI
69 select OLD_SIGACTION
70 select OLD_SIGSUSPEND
71 select PCI_DOMAINS if PCI
72 select PERF_EVENTS
73 select PERF_USE_VMALLOC
74 select RTC_LIB
75 select SPARSE_IRQ
76 select TRACE_IRQFLAGS_SUPPORT
77 help
78 The SuperH is a RISC processor targeted for use in embedded systems
79 and consumer electronics; it was also used in the Sega Dreamcast
80 gaming console. The SuperH port has a home page at
81 <http://www.linux-sh.org/>.
82
83config GENERIC_BUG
84 def_bool y
85 depends on BUG
86
87config GENERIC_HWEIGHT
88 def_bool y
89
90config GENERIC_CALIBRATE_DELAY
91 bool
92
93config GENERIC_LOCKBREAK
94 def_bool y
95 depends on SMP && PREEMPTION
96
97config ARCH_SUSPEND_POSSIBLE
98 def_bool n
99
100config ARCH_HIBERNATION_POSSIBLE
101 def_bool n
102
103config SYS_SUPPORTS_APM_EMULATION
104 bool
105 select ARCH_SUSPEND_POSSIBLE
106
107config SYS_SUPPORTS_SMP
108 bool
109
110config SYS_SUPPORTS_NUMA
111 bool
112
113config STACKTRACE_SUPPORT
114 def_bool y
115
116config LOCKDEP_SUPPORT
117 def_bool y
118
119config ARCH_HAS_ILOG2_U32
120 def_bool n
121
122config ARCH_HAS_ILOG2_U64
123 def_bool n
124
125config NO_IOPORT_MAP
126 def_bool !PCI
127 depends on !SH_SHMIN && !SH_HP6XX && !SH_SOLUTION_ENGINE && \
128 !SH_DREAMCAST
129
130config IO_TRAPPED
131 bool
132
133config SWAP_IO_SPACE
134 bool
135
136config DMA_COHERENT
137 bool
138
139config DMA_NONCOHERENT
140 def_bool !NO_DMA && !DMA_COHERENT
141 select ARCH_HAS_DMA_PREP_COHERENT
142 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
143 select DMA_DIRECT_REMAP
144
145config PGTABLE_LEVELS
146 default 3 if X2TLB
147 default 2
148
149menu "System type"
150
151#
152# Processor families
153#
154config CPU_SH2
155 bool
156 select SH_INTC
157
158config CPU_SH2A
159 bool
160 select CPU_SH2
161 select UNCACHED_MAPPING
162
163config CPU_J2
164 bool
165 select CPU_SH2
166 select OF
167 select OF_EARLY_FLATTREE
168
169config CPU_SH3
170 bool
171 select CPU_HAS_INTEVT
172 select CPU_HAS_SR_RB
173 select SH_INTC
174 select SYS_SUPPORTS_SH_TMU
175
176config CPU_SH4
177 bool
178 select ARCH_SUPPORTS_HUGETLBFS if MMU
179 select CPU_HAS_INTEVT
180 select CPU_HAS_SR_RB
181 select CPU_HAS_FPU if !CPU_SH4AL_DSP
182 select SH_INTC
183 select SYS_SUPPORTS_SH_TMU
184
185config CPU_SH4A
186 bool
187 select CPU_SH4
188
189config CPU_SH4AL_DSP
190 bool
191 select CPU_SH4A
192 select CPU_HAS_DSP
193
194config CPU_SHX2
195 bool
196
197config CPU_SHX3
198 bool
199 select DMA_COHERENT
200 select SYS_SUPPORTS_SMP
201 select SYS_SUPPORTS_NUMA
202
203config ARCH_SHMOBILE
204 bool
205 select ARCH_SUSPEND_POSSIBLE
206 select PM
207
208config CPU_HAS_PMU
209 depends on CPU_SH4 || CPU_SH4A
210 default y
211 bool
212
213choice
214 prompt "Processor sub-type selection"
215
216#
217# Processor subtypes
218#
219
220# SH-2 Processor Support
221
222config CPU_SUBTYPE_SH7619
223 bool "Support SH7619 processor"
224 select CPU_SH2
225 select SYS_SUPPORTS_SH_CMT
226
227config CPU_SUBTYPE_J2
228 bool "Support J2 processor"
229 select CPU_J2
230 select SYS_SUPPORTS_SMP
231 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
232
233# SH-2A Processor Support
234
235config CPU_SUBTYPE_SH7201
236 bool "Support SH7201 processor"
237 select CPU_SH2A
238 select CPU_HAS_FPU
239 select SYS_SUPPORTS_SH_MTU2
240
241config CPU_SUBTYPE_SH7203
242 bool "Support SH7203 processor"
243 select CPU_SH2A
244 select CPU_HAS_FPU
245 select SYS_SUPPORTS_SH_CMT
246 select SYS_SUPPORTS_SH_MTU2
247 select PINCTRL
248
249config CPU_SUBTYPE_SH7206
250 bool "Support SH7206 processor"
251 select CPU_SH2A
252 select SYS_SUPPORTS_SH_CMT
253 select SYS_SUPPORTS_SH_MTU2
254
255config CPU_SUBTYPE_SH7263
256 bool "Support SH7263 processor"
257 select CPU_SH2A
258 select CPU_HAS_FPU
259 select SYS_SUPPORTS_SH_CMT
260 select SYS_SUPPORTS_SH_MTU2
261
262config CPU_SUBTYPE_SH7264
263 bool "Support SH7264 processor"
264 select CPU_SH2A
265 select CPU_HAS_FPU
266 select SYS_SUPPORTS_SH_CMT
267 select SYS_SUPPORTS_SH_MTU2
268 select PINCTRL
269
270config CPU_SUBTYPE_SH7269
271 bool "Support SH7269 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_MXG
279 bool "Support MX-G processor"
280 select CPU_SH2A
281 select SYS_SUPPORTS_SH_MTU2
282 help
283 Select MX-G if running on an R8A03022BG part.
284
285# SH-3 Processor Support
286
287config CPU_SUBTYPE_SH7705
288 bool "Support SH7705 processor"
289 select CPU_SH3
290
291config CPU_SUBTYPE_SH7706
292 bool "Support SH7706 processor"
293 select CPU_SH3
294 help
295 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
296
297config CPU_SUBTYPE_SH7707
298 bool "Support SH7707 processor"
299 select CPU_SH3
300 help
301 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
302
303config CPU_SUBTYPE_SH7708
304 bool "Support SH7708 processor"
305 select CPU_SH3
306 help
307 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
308 if you have a 100 Mhz SH-3 HD6417708R CPU.
309
310config CPU_SUBTYPE_SH7709
311 bool "Support SH7709 processor"
312 select CPU_SH3
313 help
314 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
315
316config CPU_SUBTYPE_SH7710
317 bool "Support SH7710 processor"
318 select CPU_SH3
319 select CPU_HAS_DSP
320 help
321 Select SH7710 if you have a SH3-DSP SH7710 CPU.
322
323config CPU_SUBTYPE_SH7712
324 bool "Support SH7712 processor"
325 select CPU_SH3
326 select CPU_HAS_DSP
327 help
328 Select SH7712 if you have a SH3-DSP SH7712 CPU.
329
330config CPU_SUBTYPE_SH7720
331 bool "Support SH7720 processor"
332 select CPU_SH3
333 select CPU_HAS_DSP
334 select SYS_SUPPORTS_SH_CMT
335 select USB_OHCI_SH if USB_OHCI_HCD
336 select PINCTRL
337 help
338 Select SH7720 if you have a SH3-DSP SH7720 CPU.
339
340config CPU_SUBTYPE_SH7721
341 bool "Support SH7721 processor"
342 select CPU_SH3
343 select CPU_HAS_DSP
344 select SYS_SUPPORTS_SH_CMT
345 select USB_OHCI_SH if USB_OHCI_HCD
346 help
347 Select SH7721 if you have a SH3-DSP SH7721 CPU.
348
349# SH-4 Processor Support
350
351config CPU_SUBTYPE_SH7750
352 bool "Support SH7750 processor"
353 select CPU_SH4
354 help
355 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
356
357config CPU_SUBTYPE_SH7091
358 bool "Support SH7091 processor"
359 select CPU_SH4
360 help
361 Select SH7091 if you have an SH-4 based Sega device (such as
362 the Dreamcast, Naomi, and Naomi 2).
363
364config CPU_SUBTYPE_SH7750R
365 bool "Support SH7750R processor"
366 select CPU_SH4
367
368config CPU_SUBTYPE_SH7750S
369 bool "Support SH7750S processor"
370 select CPU_SH4
371
372config CPU_SUBTYPE_SH7751
373 bool "Support SH7751 processor"
374 select CPU_SH4
375 help
376 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
377 or if you have a HD6417751R CPU.
378
379config CPU_SUBTYPE_SH7751R
380 bool "Support SH7751R processor"
381 select CPU_SH4
382
383config CPU_SUBTYPE_SH7760
384 bool "Support SH7760 processor"
385 select CPU_SH4
386
387# SH-4A Processor Support
388
389config CPU_SUBTYPE_SH7723
390 bool "Support SH7723 processor"
391 select CPU_SH4A
392 select CPU_SHX2
393 select ARCH_SHMOBILE
394 select ARCH_SPARSEMEM_ENABLE
395 select SYS_SUPPORTS_SH_CMT
396 select PINCTRL
397 help
398 Select SH7723 if you have an SH-MobileR2 CPU.
399
400config CPU_SUBTYPE_SH7724
401 bool "Support SH7724 processor"
402 select CPU_SH4A
403 select CPU_SHX2
404 select ARCH_SHMOBILE
405 select ARCH_SPARSEMEM_ENABLE
406 select SYS_SUPPORTS_SH_CMT
407 select PINCTRL
408 help
409 Select SH7724 if you have an SH-MobileR2R CPU.
410
411config CPU_SUBTYPE_SH7734
412 bool "Support SH7734 processor"
413 select CPU_SH4A
414 select CPU_SHX2
415 select PINCTRL
416 help
417 Select SH7734 if you have a SH4A SH7734 CPU.
418
419config CPU_SUBTYPE_SH7757
420 bool "Support SH7757 processor"
421 select CPU_SH4A
422 select CPU_SHX2
423 select PINCTRL
424 help
425 Select SH7757 if you have a SH4A SH7757 CPU.
426
427config CPU_SUBTYPE_SH7763
428 bool "Support SH7763 processor"
429 select CPU_SH4A
430 select USB_OHCI_SH if USB_OHCI_HCD
431 help
432 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
433
434config CPU_SUBTYPE_SH7770
435 bool "Support SH7770 processor"
436 select CPU_SH4A
437
438config CPU_SUBTYPE_SH7780
439 bool "Support SH7780 processor"
440 select CPU_SH4A
441
442config CPU_SUBTYPE_SH7785
443 bool "Support SH7785 processor"
444 select CPU_SH4A
445 select CPU_SHX2
446 select ARCH_SPARSEMEM_ENABLE
447 select SYS_SUPPORTS_NUMA
448 select PINCTRL
449
450config CPU_SUBTYPE_SH7786
451 bool "Support SH7786 processor"
452 select CPU_SH4A
453 select CPU_SHX3
454 select CPU_HAS_PTEAEX
455 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
456 select USB_OHCI_SH if USB_OHCI_HCD
457 select USB_EHCI_SH if USB_EHCI_HCD
458 select PINCTRL
459
460config CPU_SUBTYPE_SHX3
461 bool "Support SH-X3 processor"
462 select CPU_SH4A
463 select CPU_SHX3
464 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
465 select GPIOLIB
466 select PINCTRL
467
468# SH4AL-DSP Processor Support
469
470config CPU_SUBTYPE_SH7343
471 bool "Support SH7343 processor"
472 select CPU_SH4AL_DSP
473 select ARCH_SHMOBILE
474 select SYS_SUPPORTS_SH_CMT
475
476config CPU_SUBTYPE_SH7722
477 bool "Support SH7722 processor"
478 select CPU_SH4AL_DSP
479 select CPU_SHX2
480 select ARCH_SHMOBILE
481 select ARCH_SPARSEMEM_ENABLE
482 select SYS_SUPPORTS_NUMA
483 select SYS_SUPPORTS_SH_CMT
484 select PINCTRL
485
486config CPU_SUBTYPE_SH7366
487 bool "Support SH7366 processor"
488 select CPU_SH4AL_DSP
489 select CPU_SHX2
490 select ARCH_SHMOBILE
491 select ARCH_SPARSEMEM_ENABLE
492 select SYS_SUPPORTS_NUMA
493 select SYS_SUPPORTS_SH_CMT
494
495endchoice
496
497source "arch/sh/mm/Kconfig"
498
499source "arch/sh/Kconfig.cpu"
500
501source "arch/sh/boards/Kconfig"
502
503menu "Timer and clock configuration"
504
505config SH_PCLK_FREQ
506 int "Peripheral clock frequency (in Hz)"
507 depends on SH_CLK_CPG_LEGACY
508 default "31250000" if CPU_SUBTYPE_SH7619
509 default "33333333" if CPU_SUBTYPE_SH7770 || \
510 CPU_SUBTYPE_SH7760 || \
511 CPU_SUBTYPE_SH7705 || \
512 CPU_SUBTYPE_SH7203 || \
513 CPU_SUBTYPE_SH7206 || \
514 CPU_SUBTYPE_SH7263 || \
515 CPU_SUBTYPE_MXG
516 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
517 default "50000000"
518 help
519 This option is used to specify the peripheral clock frequency.
520 This is necessary for determining the reference clock value on
521 platforms lacking an RTC.
522
523config SH_CLK_CPG
524 def_bool y
525
526config SH_CLK_CPG_LEGACY
527 depends on SH_CLK_CPG
528 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
529 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
530 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
531 !CPU_SUBTYPE_SH7269
532
533endmenu
534
535menu "CPU Frequency scaling"
536source "drivers/cpufreq/Kconfig"
537endmenu
538
539source "arch/sh/drivers/Kconfig"
540
541endmenu
542
543menu "Kernel features"
544
545source "kernel/Kconfig.hz"
546
547config ARCH_SUPPORTS_KEXEC
548 def_bool MMU
549
550config ARCH_SUPPORTS_CRASH_DUMP
551 def_bool BROKEN_ON_SMP
552
553config ARCH_DEFAULT_CRASH_DUMP
554 def_bool y
555
556config ARCH_SUPPORTS_KEXEC_JUMP
557 def_bool y
558
559config PHYSICAL_START
560 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
561 default MEMORY_START
562 help
563 This gives the physical address where the kernel is loaded
564 and is ordinarily the same as MEMORY_START.
565
566 Different values are primarily used in the case of kexec on panic
567 where the fail safe kernel needs to run at a different address
568 than the panic-ed kernel.
569
570config SMP
571 bool "Symmetric multi-processing support"
572 depends on SYS_SUPPORTS_SMP
573 help
574 This enables support for systems with more than one CPU. If you have
575 a system with only one CPU, say N. If you have a system with more
576 than one CPU, say Y.
577
578 If you say N here, the kernel will run on uni- and multiprocessor
579 machines, but will use only one CPU of a multiprocessor machine. If
580 you say Y here, the kernel will run on many, but not all,
581 uniprocessor machines. On a uniprocessor machine, the kernel
582 will run faster if you say N here.
583
584 People using multiprocessor machines who say Y here should also say
585 Y to "Enhanced Real Time Clock Support", below.
586
587 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
588 available at <https://www.tldp.org/docs.html#howto>.
589
590 If you don't know what to do here, say N.
591
592config NR_CPUS
593 int "Maximum number of CPUs (2-32)"
594 range 2 32
595 depends on SMP
596 default "4" if CPU_SUBTYPE_SHX3
597 default "2"
598 help
599 This allows you to specify the maximum number of CPUs which this
600 kernel will support. The maximum supported value is 32 and the
601 minimum value which makes sense is 2.
602
603 This is purely to save memory - each supported CPU adds
604 approximately eight kilobytes to the kernel image.
605
606config HOTPLUG_CPU
607 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
608 depends on SMP
609 help
610 Say Y here to experiment with turning CPUs off and on. CPUs
611 can be controlled through /sys/devices/system/cpu.
612
613config GUSA
614 def_bool y
615 depends on !SMP
616 help
617 This enables support for gUSA (general UserSpace Atomicity).
618 This is the default implementation for both UP and non-ll/sc
619 CPUs, and is used by the libc, amongst others.
620
621 For additional information, design information can be found
622 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
623
624 This should only be disabled for special cases where alternate
625 atomicity implementations exist.
626
627config GUSA_RB
628 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
629 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
630 help
631 Enabling this option will allow the kernel to implement some
632 atomic operations using a software implementation of load-locked/
633 store-conditional (LLSC). On machines which do not have hardware
634 LLSC, this should be more efficient than the other alternative of
635 disabling interrupts around the atomic sequence.
636
637config HW_PERF_EVENTS
638 bool "Enable hardware performance counter support for perf events"
639 depends on PERF_EVENTS && CPU_HAS_PMU
640 default y
641 help
642 Enable hardware performance counter support for perf events. If
643 disabled, perf events will use software events only.
644
645source "drivers/sh/Kconfig"
646
647endmenu
648
649menu "Boot options"
650
651config USE_BUILTIN_DTB
652 bool "Use builtin DTB"
653 default n
654 depends on SH_DEVICE_TREE
655 help
656 Link a device tree blob for particular hardware into the kernel,
657 suppressing use of the DTB pointer provided by the bootloader.
658 This option should only be used with legacy bootloaders that are
659 not capable of providing a DTB to the kernel, or for experimental
660 hardware without stable device tree bindings.
661
662config BUILTIN_DTB_SOURCE
663 string "Source file for builtin DTB"
664 default ""
665 depends on USE_BUILTIN_DTB
666 help
667 Base name (without suffix, relative to arch/sh/boot/dts) for the
668 a DTS file that will be used to produce the DTB linked into the
669 kernel.
670
671config ZERO_PAGE_OFFSET
672 hex
673 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
674 SH_7751_SOLUTION_ENGINE
675 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
676 default "0x00002000" if PAGE_SIZE_8KB
677 default "0x00001000"
678 help
679 This sets the default offset of zero page.
680
681config BOOT_LINK_OFFSET
682 hex
683 default "0x00210000" if SH_SHMIN
684 default "0x00810000" if SH_7780_SOLUTION_ENGINE
685 default "0x009e0000" if SH_TITAN
686 default "0x01800000" if SH_SDK7780
687 default "0x02000000" if SH_EDOSK7760
688 default "0x00800000"
689 help
690 This option allows you to set the link address offset of the zImage.
691 This can be useful if you are on a board which has a small amount of
692 memory.
693
694config ENTRY_OFFSET
695 hex
696 default "0x00001000" if PAGE_SIZE_4KB
697 default "0x00002000" if PAGE_SIZE_8KB
698 default "0x00004000" if PAGE_SIZE_16KB
699 default "0x00010000" if PAGE_SIZE_64KB
700 default "0x00000000"
701
702config ROMIMAGE_MMCIF
703 bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
704 depends on CPU_SUBTYPE_SH7724
705 help
706 Say Y here to include experimental MMCIF loading code in
707 romImage. With this enabled it is possible to write the romImage
708 kernel image to an MMC card and boot the kernel straight from
709 the reset vector. At reset the processor Mask ROM will load the
710 first part of the romImage which in turn loads the rest the kernel
711 image to RAM using the MMCIF hardware block.
712
713choice
714 prompt "Kernel command line"
715 default CMDLINE_OVERWRITE
716 help
717 Setting this option allows the kernel command line arguments
718 to be set.
719
720config CMDLINE_OVERWRITE
721 bool "Overwrite bootloader kernel arguments"
722 help
723 Given string will overwrite any arguments passed in by
724 a bootloader.
725
726config CMDLINE_EXTEND
727 bool "Extend bootloader kernel arguments"
728 help
729 Given string will be concatenated with arguments passed in
730 by a bootloader.
731
732config CMDLINE_FROM_BOOTLOADER
733 bool "Use bootloader kernel arguments"
734 help
735 Uses the command-line options passed by the boot loader.
736
737endchoice
738
739config CMDLINE
740 string "Kernel command line arguments string"
741 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
742 default "console=ttySC1,115200"
743
744endmenu
745
746menu "Bus options"
747
748config MAPLE
749 bool "Maple Bus support"
750 depends on SH_DREAMCAST
751 help
752 The Maple Bus is SEGA's serial communication bus for peripherals
753 on the Dreamcast. Without this bus support you won't be able to
754 get your Dreamcast keyboard etc to work, so most users
755 probably want to say 'Y' here, unless you are only using the
756 Dreamcast with a serial line terminal or a remote network
757 connection.
758
759endmenu
760
761menu "Power management options (EXPERIMENTAL)"
762
763source "kernel/power/Kconfig"
764
765source "drivers/cpuidle/Kconfig"
766
767endmenu