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Linux/arch/sh/Kconfig

  1 config SUPERH
  2         def_bool y
  3         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  4         select ARCH_MIGHT_HAVE_PC_PARPORT
  5         select HAVE_PATA_PLATFORM
  6         select CLKDEV_LOOKUP
  7         select HAVE_IDE if HAS_IOPORT_MAP
  8         select HAVE_MEMBLOCK
  9         select HAVE_MEMBLOCK_NODE_MAP
 10         select ARCH_DISCARD_MEMBLOCK
 11         select HAVE_OPROFILE
 12         select HAVE_GENERIC_DMA_COHERENT
 13         select HAVE_ARCH_TRACEHOOK
 14         select HAVE_DMA_API_DEBUG
 15         select HAVE_PERF_EVENTS
 16         select HAVE_DEBUG_BUGVERBOSE
 17         select ARCH_HAVE_CUSTOM_GPIO_H
 18         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
 19         select ARCH_HAS_GCOV_PROFILE_ALL
 20         select PERF_USE_VMALLOC
 21         select HAVE_DEBUG_KMEMLEAK
 22         select HAVE_KERNEL_GZIP
 23         select HAVE_KERNEL_BZIP2
 24         select HAVE_KERNEL_LZMA
 25         select HAVE_KERNEL_XZ
 26         select HAVE_KERNEL_LZO
 27         select HAVE_UID16
 28         select ARCH_WANT_IPC_PARSE_VERSION
 29         select HAVE_SYSCALL_TRACEPOINTS
 30         select HAVE_REGS_AND_STACK_ACCESS_API
 31         select MAY_HAVE_SPARSE_IRQ
 32         select IRQ_FORCED_THREADING
 33         select RTC_LIB
 34         select GENERIC_ATOMIC64
 35         select GENERIC_IRQ_SHOW
 36         select GENERIC_SMP_IDLE_THREAD
 37         select GENERIC_IDLE_POLL_SETUP
 38         select GENERIC_CLOCKEVENTS
 39         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
 40         select GENERIC_STRNCPY_FROM_USER
 41         select GENERIC_STRNLEN_USER
 42         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
 43         select MODULES_USE_ELF_RELA
 44         select OLD_SIGSUSPEND
 45         select OLD_SIGACTION
 46         select HAVE_ARCH_AUDITSYSCALL
 47         help
 48           The SuperH is a RISC processor targeted for use in embedded systems
 49           and consumer electronics; it was also used in the Sega Dreamcast
 50           gaming console.  The SuperH port has a home page at
 51           <http://www.linux-sh.org/>.
 52 
 53 config SUPERH32
 54         def_bool ARCH = "sh"
 55         select HAVE_KPROBES
 56         select HAVE_KRETPROBES
 57         select HAVE_IOREMAP_PROT if MMU && !X2TLB
 58         select HAVE_FUNCTION_TRACER
 59         select HAVE_FTRACE_MCOUNT_RECORD
 60         select HAVE_DYNAMIC_FTRACE
 61         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
 62         select ARCH_WANT_IPC_PARSE_VERSION
 63         select HAVE_FUNCTION_GRAPH_TRACER
 64         select HAVE_ARCH_KGDB
 65         select HAVE_HW_BREAKPOINT
 66         select HAVE_MIXED_BREAKPOINTS_REGS
 67         select PERF_EVENTS
 68         select ARCH_HIBERNATION_POSSIBLE if MMU
 69         select SPARSE_IRQ
 70         select HAVE_CC_STACKPROTECTOR
 71 
 72 config SUPERH64
 73         def_bool ARCH = "sh64"
 74         select KALLSYMS
 75 
 76 config ARCH_DEFCONFIG
 77         string
 78         default "arch/sh/configs/shx3_defconfig" if SUPERH32
 79         default "arch/sh/configs/cayman_defconfig" if SUPERH64
 80 
 81 config RWSEM_GENERIC_SPINLOCK
 82         def_bool y
 83 
 84 config RWSEM_XCHGADD_ALGORITHM
 85         bool
 86 
 87 config GENERIC_BUG
 88         def_bool y
 89         depends on BUG && SUPERH32
 90 
 91 config GENERIC_CSUM
 92         def_bool y
 93         depends on SUPERH64
 94 
 95 config GENERIC_HWEIGHT
 96         def_bool y
 97 
 98 config GENERIC_CALIBRATE_DELAY
 99         bool
100 
101 config GENERIC_LOCKBREAK
102         def_bool y
103         depends on SMP && PREEMPT
104 
105 config ARCH_SUSPEND_POSSIBLE
106         def_bool n
107 
108 config ARCH_HIBERNATION_POSSIBLE
109         def_bool n
110 
111 config SYS_SUPPORTS_APM_EMULATION
112         bool
113         select ARCH_SUSPEND_POSSIBLE
114 
115 config SYS_SUPPORTS_HUGETLBFS
116         bool
117 
118 config SYS_SUPPORTS_SMP
119         bool
120 
121 config SYS_SUPPORTS_NUMA
122         bool
123 
124 config SYS_SUPPORTS_PCI
125         bool
126 
127 config STACKTRACE_SUPPORT
128         def_bool y
129 
130 config LOCKDEP_SUPPORT
131         def_bool y
132 
133 config ARCH_HAS_ILOG2_U32
134         def_bool n
135 
136 config ARCH_HAS_ILOG2_U64
137         def_bool n
138 
139 config NO_IOPORT_MAP
140         def_bool !PCI
141         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
142                    !SH_HP6XX && !SH_SOLUTION_ENGINE
143 
144 config IO_TRAPPED
145         bool
146 
147 config SWAP_IO_SPACE
148         bool
149 
150 config DMA_COHERENT
151         bool
152 
153 config DMA_NONCOHERENT
154         def_bool !DMA_COHERENT
155 
156 config NEED_DMA_MAP_STATE
157         def_bool DMA_NONCOHERENT
158 
159 config NEED_SG_DMA_LENGTH
160         def_bool y
161 
162 config PGTABLE_LEVELS
163         default 3 if X2TLB
164         default 2
165 
166 source "init/Kconfig"
167 
168 source "kernel/Kconfig.freezer"
169 
170 menu "System type"
171 
172 #
173 # Processor families
174 #
175 config CPU_SH2
176         bool
177         select SH_INTC
178 
179 config CPU_SH2A
180         bool
181         select CPU_SH2
182         select UNCACHED_MAPPING
183 
184 config CPU_SH3
185         bool
186         select CPU_HAS_INTEVT
187         select CPU_HAS_SR_RB
188         select SH_INTC
189         select SYS_SUPPORTS_SH_TMU
190 
191 config CPU_SH4
192         bool
193         select CPU_HAS_INTEVT
194         select CPU_HAS_SR_RB
195         select CPU_HAS_FPU if !CPU_SH4AL_DSP
196         select SH_INTC
197         select SYS_SUPPORTS_SH_TMU
198         select SYS_SUPPORTS_HUGETLBFS if MMU
199 
200 config CPU_SH4A
201         bool
202         select CPU_SH4
203 
204 config CPU_SH4AL_DSP
205         bool
206         select CPU_SH4A
207         select CPU_HAS_DSP
208 
209 config CPU_SH5
210         bool
211         select CPU_HAS_FPU
212         select SYS_SUPPORTS_SH_TMU
213         select SYS_SUPPORTS_HUGETLBFS if MMU
214 
215 config CPU_SHX2
216         bool
217 
218 config CPU_SHX3
219         bool
220         select DMA_COHERENT
221         select SYS_SUPPORTS_SMP
222         select SYS_SUPPORTS_NUMA
223 
224 config ARCH_SHMOBILE
225         bool
226         select ARCH_SUSPEND_POSSIBLE
227         select PM
228 
229 config CPU_HAS_PMU
230        depends on CPU_SH4 || CPU_SH4A
231        default y
232        bool
233 
234 if SUPERH32
235 
236 choice
237         prompt "Processor sub-type selection"
238 
239 #
240 # Processor subtypes
241 #
242 
243 # SH-2 Processor Support
244 
245 config CPU_SUBTYPE_SH7619
246         bool "Support SH7619 processor"
247         select CPU_SH2
248         select SYS_SUPPORTS_SH_CMT
249 
250 # SH-2A Processor Support
251 
252 config CPU_SUBTYPE_SH7201
253         bool "Support SH7201 processor"
254         select CPU_SH2A
255         select CPU_HAS_FPU
256         select SYS_SUPPORTS_SH_MTU2
257  
258 config CPU_SUBTYPE_SH7203
259         bool "Support SH7203 processor"
260         select CPU_SH2A
261         select CPU_HAS_FPU
262         select SYS_SUPPORTS_SH_CMT
263         select SYS_SUPPORTS_SH_MTU2
264         select ARCH_WANT_OPTIONAL_GPIOLIB
265         select PINCTRL
266 
267 config CPU_SUBTYPE_SH7206
268         bool "Support SH7206 processor"
269         select CPU_SH2A
270         select SYS_SUPPORTS_SH_CMT
271         select SYS_SUPPORTS_SH_MTU2
272 
273 config CPU_SUBTYPE_SH7263
274         bool "Support SH7263 processor"
275         select CPU_SH2A
276         select CPU_HAS_FPU
277         select SYS_SUPPORTS_SH_CMT
278         select SYS_SUPPORTS_SH_MTU2
279 
280 config CPU_SUBTYPE_SH7264
281         bool "Support SH7264 processor"
282         select CPU_SH2A
283         select CPU_HAS_FPU
284         select SYS_SUPPORTS_SH_CMT
285         select SYS_SUPPORTS_SH_MTU2
286         select PINCTRL
287 
288 config CPU_SUBTYPE_SH7269
289         bool "Support SH7269 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 
296 config CPU_SUBTYPE_MXG
297         bool "Support MX-G processor"
298         select CPU_SH2A
299         select SYS_SUPPORTS_SH_MTU2
300         help
301           Select MX-G if running on an R8A03022BG part.
302 
303 # SH-3 Processor Support
304 
305 config CPU_SUBTYPE_SH7705
306         bool "Support SH7705 processor"
307         select CPU_SH3
308 
309 config CPU_SUBTYPE_SH7706
310         bool "Support SH7706 processor"
311         select CPU_SH3
312         help
313           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
314 
315 config CPU_SUBTYPE_SH7707
316         bool "Support SH7707 processor"
317         select CPU_SH3
318         help
319           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
320 
321 config CPU_SUBTYPE_SH7708
322         bool "Support SH7708 processor"
323         select CPU_SH3
324         help
325           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
326           if you have a 100 Mhz SH-3 HD6417708R CPU.
327 
328 config CPU_SUBTYPE_SH7709
329         bool "Support SH7709 processor"
330         select CPU_SH3
331         help
332           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
333 
334 config CPU_SUBTYPE_SH7710
335         bool "Support SH7710 processor"
336         select CPU_SH3
337         select CPU_HAS_DSP
338         help
339           Select SH7710 if you have a SH3-DSP SH7710 CPU.
340 
341 config CPU_SUBTYPE_SH7712
342         bool "Support SH7712 processor"
343         select CPU_SH3
344         select CPU_HAS_DSP
345         help
346           Select SH7712 if you have a SH3-DSP SH7712 CPU.
347 
348 config CPU_SUBTYPE_SH7720
349         bool "Support SH7720 processor"
350         select CPU_SH3
351         select CPU_HAS_DSP
352         select SYS_SUPPORTS_SH_CMT
353         select ARCH_WANT_OPTIONAL_GPIOLIB
354         select USB_OHCI_SH if USB_OHCI_HCD
355         select PINCTRL
356         help
357           Select SH7720 if you have a SH3-DSP SH7720 CPU.
358 
359 config CPU_SUBTYPE_SH7721
360         bool "Support SH7721 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         help
366           Select SH7721 if you have a SH3-DSP SH7721 CPU.
367 
368 # SH-4 Processor Support
369 
370 config CPU_SUBTYPE_SH7750
371         bool "Support SH7750 processor"
372         select CPU_SH4
373         help
374           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
375 
376 config CPU_SUBTYPE_SH7091
377         bool "Support SH7091 processor"
378         select CPU_SH4
379         help
380           Select SH7091 if you have an SH-4 based Sega device (such as
381           the Dreamcast, Naomi, and Naomi 2).
382 
383 config CPU_SUBTYPE_SH7750R
384         bool "Support SH7750R processor"
385         select CPU_SH4
386 
387 config CPU_SUBTYPE_SH7750S
388         bool "Support SH7750S processor"
389         select CPU_SH4
390 
391 config CPU_SUBTYPE_SH7751
392         bool "Support SH7751 processor"
393         select CPU_SH4
394         help
395           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
396           or if you have a HD6417751R CPU.
397 
398 config CPU_SUBTYPE_SH7751R
399         bool "Support SH7751R processor"
400         select CPU_SH4
401 
402 config CPU_SUBTYPE_SH7760
403         bool "Support SH7760 processor"
404         select CPU_SH4
405 
406 config CPU_SUBTYPE_SH4_202
407         bool "Support SH4-202 processor"
408         select CPU_SH4
409 
410 # SH-4A Processor Support
411 
412 config CPU_SUBTYPE_SH7723
413         bool "Support SH7723 processor"
414         select CPU_SH4A
415         select CPU_SHX2
416         select ARCH_SHMOBILE
417         select ARCH_SPARSEMEM_ENABLE
418         select SYS_SUPPORTS_SH_CMT
419         select ARCH_WANT_OPTIONAL_GPIOLIB
420         select PINCTRL
421         help
422           Select SH7723 if you have an SH-MobileR2 CPU.
423 
424 config 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 ARCH_WANT_OPTIONAL_GPIOLIB
432         select PINCTRL
433         help
434           Select SH7724 if you have an SH-MobileR2R CPU.
435 
436 config CPU_SUBTYPE_SH7734
437         bool "Support SH7734 processor"
438         select CPU_SH4A
439         select CPU_SHX2
440         select ARCH_WANT_OPTIONAL_GPIOLIB
441         select PINCTRL
442         help
443           Select SH7734 if you have a SH4A SH7734 CPU.
444 
445 config CPU_SUBTYPE_SH7757
446         bool "Support SH7757 processor"
447         select CPU_SH4A
448         select CPU_SHX2
449         select ARCH_WANT_OPTIONAL_GPIOLIB
450         select PINCTRL
451         help
452           Select SH7757 if you have a SH4A SH7757 CPU.
453 
454 config CPU_SUBTYPE_SH7763
455         bool "Support SH7763 processor"
456         select CPU_SH4A
457         select USB_OHCI_SH if USB_OHCI_HCD
458         help
459           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
460 
461 config CPU_SUBTYPE_SH7770
462         bool "Support SH7770 processor"
463         select CPU_SH4A
464 
465 config CPU_SUBTYPE_SH7780
466         bool "Support SH7780 processor"
467         select CPU_SH4A
468 
469 config CPU_SUBTYPE_SH7785
470         bool "Support SH7785 processor"
471         select CPU_SH4A
472         select CPU_SHX2
473         select ARCH_SPARSEMEM_ENABLE
474         select SYS_SUPPORTS_NUMA
475         select ARCH_WANT_OPTIONAL_GPIOLIB
476         select PINCTRL
477 
478 config CPU_SUBTYPE_SH7786
479         bool "Support SH7786 processor"
480         select CPU_SH4A
481         select CPU_SHX3
482         select CPU_HAS_PTEAEX
483         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
484         select ARCH_WANT_OPTIONAL_GPIOLIB
485         select USB_OHCI_SH if USB_OHCI_HCD
486         select USB_EHCI_SH if USB_EHCI_HCD
487         select PINCTRL
488 
489 config 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 ARCH_REQUIRE_GPIOLIB
495         select PINCTRL
496 
497 # SH4AL-DSP Processor Support
498 
499 config CPU_SUBTYPE_SH7343
500         bool "Support SH7343 processor"
501         select CPU_SH4AL_DSP
502         select ARCH_SHMOBILE
503         select SYS_SUPPORTS_SH_CMT
504 
505 config 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 ARCH_WANT_OPTIONAL_GPIOLIB
514         select PINCTRL
515 
516 config 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 
525 endchoice
526 
527 endif
528 
529 if SUPERH64
530 
531 choice
532         prompt "Processor sub-type selection"
533 
534 # SH-5 Processor Support
535 
536 config CPU_SUBTYPE_SH5_101
537         bool "Support SH5-101 processor"
538         select CPU_SH5
539 
540 config CPU_SUBTYPE_SH5_103
541         bool "Support SH5-103 processor"
542         select CPU_SH5
543 
544 endchoice
545 
546 endif
547 
548 source "arch/sh/mm/Kconfig"
549  
550 source "arch/sh/Kconfig.cpu"
551 
552 source "arch/sh/boards/Kconfig"
553 
554 menu "Timer and clock configuration"
555 
556 config 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 
575 config SH_CLK_CPG
576         def_bool y
577 
578 config 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 
585 endmenu
586 
587 menu "CPU Frequency scaling"
588 source "drivers/cpufreq/Kconfig"
589 endmenu
590 
591 source "arch/sh/drivers/Kconfig"
592 
593 endmenu
594 
595 menu "Kernel features"
596 
597 source kernel/Kconfig.hz
598 
599 config 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 
617 config 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/kdump/kdump.txt
630 
631 config 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 
638 config 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 
649 config 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 
665 config 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/nmi_watchdog.txt> 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 
687 config 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 
701 config 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 
708 source "kernel/Kconfig.preempt"
709 
710 config GUSA
711         def_bool y
712         depends on !SMP && SUPERH32
713         help
714           This enables support for gUSA (general UserSpace Atomicity).
715           This is the default implementation for both UP and non-ll/sc
716           CPUs, and is used by the libc, amongst others.
717 
718           For additional information, design information can be found 
719           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
720 
721           This should only be disabled for special cases where alternate
722           atomicity implementations exist.
723 
724 config GUSA_RB
725         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
726         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
727         help
728           Enabling this option will allow the kernel to implement some
729           atomic operations using a software implementation of load-locked/
730           store-conditional (LLSC). On machines which do not have hardware
731           LLSC, this should be more efficient than the other alternative of
732           disabling interrupts around the atomic sequence.
733 
734 config HW_PERF_EVENTS
735         bool "Enable hardware performance counter support for perf events"
736         depends on PERF_EVENTS && CPU_HAS_PMU
737         default y
738         help
739           Enable hardware performance counter support for perf events. If
740           disabled, perf events will use software events only.
741 
742 source "drivers/sh/Kconfig"
743 
744 endmenu
745 
746 menu "Boot options"
747 
748 config ZERO_PAGE_OFFSET
749         hex
750         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
751                                 SH_7751_SOLUTION_ENGINE
752         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
753         default "0x00002000" if PAGE_SIZE_8KB
754         default "0x00001000"
755         help
756           This sets the default offset of zero page.
757 
758 config BOOT_LINK_OFFSET
759         hex
760         default "0x00210000" if SH_SHMIN
761         default "0x00400000" if SH_CAYMAN
762         default "0x00810000" if SH_7780_SOLUTION_ENGINE
763         default "0x009e0000" if SH_TITAN
764         default "0x01800000" if SH_SDK7780
765         default "0x02000000" if SH_EDOSK7760
766         default "0x00800000"
767         help
768           This option allows you to set the link address offset of the zImage.
769           This can be useful if you are on a board which has a small amount of
770           memory.
771 
772 config ENTRY_OFFSET
773         hex
774         default "0x00001000" if PAGE_SIZE_4KB
775         default "0x00002000" if PAGE_SIZE_8KB
776         default "0x00004000" if PAGE_SIZE_16KB
777         default "0x00010000" if PAGE_SIZE_64KB
778         default "0x00000000"
779 
780 config ROMIMAGE_MMCIF
781         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
782         depends on CPU_SUBTYPE_SH7724
783         help
784           Say Y here to include experimental MMCIF loading code in
785           romImage. With this enabled it is possible to write the romImage
786           kernel image to an MMC card and boot the kernel straight from
787           the reset vector. At reset the processor Mask ROM will load the
788           first part of the romImage which in turn loads the rest the kernel
789           image to RAM using the MMCIF hardware block.
790 
791 choice
792         prompt "Kernel command line"
793         optional
794         default CMDLINE_OVERWRITE
795         help
796           Setting this option allows the kernel command line arguments
797           to be set.
798 
799 config CMDLINE_OVERWRITE
800         bool "Overwrite bootloader kernel arguments"
801         help
802           Given string will overwrite any arguments passed in by
803           a bootloader.
804 
805 config CMDLINE_EXTEND
806         bool "Extend bootloader kernel arguments"
807         help
808           Given string will be concatenated with arguments passed in
809           by a bootloader.
810 
811 endchoice
812 
813 config CMDLINE
814         string "Kernel command line arguments string"
815         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
816         default "console=ttySC1,115200"
817 
818 endmenu
819 
820 menu "Bus options"
821 
822 config SUPERHYWAY
823         tristate "SuperHyway Bus support"
824         depends on CPU_SUBTYPE_SH4_202
825 
826 config MAPLE
827         bool "Maple Bus support"
828         depends on SH_DREAMCAST
829         help
830          The Maple Bus is SEGA's serial communication bus for peripherals
831          on the Dreamcast. Without this bus support you won't be able to
832          get your Dreamcast keyboard etc to work, so most users
833          probably want to say 'Y' here, unless you are only using the
834          Dreamcast with a serial line terminal or a remote network
835          connection.
836 
837 config PCI
838         bool "PCI support"
839         depends on SYS_SUPPORTS_PCI
840         select PCI_DOMAINS
841         select GENERIC_PCI_IOMAP
842         select NO_GENERIC_PCI_IOPORT_MAP
843         help
844           Find out whether you have a PCI motherboard. PCI is the name of a
845           bus system, i.e. the way the CPU talks to the other stuff inside
846           your box. If you have PCI, say Y, otherwise N.
847 
848 config PCI_DOMAINS
849         bool
850 
851 source "drivers/pci/Kconfig"
852 
853 source "drivers/pcmcia/Kconfig"
854 
855 endmenu
856 
857 menu "Executable file formats"
858 
859 source "fs/Kconfig.binfmt"
860 
861 endmenu
862 
863 menu "Power management options (EXPERIMENTAL)"
864 
865 source "kernel/power/Kconfig"
866 
867 source "drivers/cpuidle/Kconfig"
868 
869 endmenu
870 
871 source "net/Kconfig"
872 
873 source "drivers/Kconfig"
874 
875 source "fs/Kconfig"
876 
877 source "arch/sh/Kconfig.debug"
878 
879 source "security/Kconfig"
880 
881 source "crypto/Kconfig"
882 
883 source "lib/Kconfig"

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