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Linux/arch/sh/Kconfig

  1 config SUPERH
  2         def_bool y
  3         select ARCH_MIGHT_HAVE_PC_PARPORT
  4         select EXPERT
  5         select CLKDEV_LOOKUP
  6         select HAVE_IDE if HAS_IOPORT
  7         select HAVE_MEMBLOCK
  8         select HAVE_MEMBLOCK_NODE_MAP
  9         select ARCH_DISCARD_MEMBLOCK
 10         select HAVE_OPROFILE
 11         select HAVE_GENERIC_DMA_COHERENT
 12         select HAVE_ARCH_TRACEHOOK
 13         select HAVE_DMA_API_DEBUG
 14         select HAVE_DMA_ATTRS
 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 PERF_USE_VMALLOC
 20         select HAVE_DEBUG_KMEMLEAK
 21         select HAVE_KERNEL_GZIP
 22         select HAVE_KERNEL_BZIP2
 23         select HAVE_KERNEL_LZMA
 24         select HAVE_KERNEL_XZ
 25         select HAVE_KERNEL_LZO
 26         select HAVE_UID16
 27         select ARCH_WANT_IPC_PARSE_VERSION
 28         select HAVE_SYSCALL_TRACEPOINTS
 29         select HAVE_REGS_AND_STACK_ACCESS_API
 30         select MAY_HAVE_SPARSE_IRQ
 31         select IRQ_FORCED_THREADING
 32         select RTC_LIB
 33         select GENERIC_ATOMIC64
 34         select GENERIC_IRQ_SHOW
 35         select GENERIC_SMP_IDLE_THREAD
 36         select GENERIC_IDLE_POLL_SETUP
 37         select GENERIC_CLOCKEVENTS
 38         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
 39         select GENERIC_STRNCPY_FROM_USER
 40         select GENERIC_STRNLEN_USER
 41         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
 42         select MODULES_USE_ELF_RELA
 43         select OLD_SIGSUSPEND
 44         select OLD_SIGACTION
 45         help
 46           The SuperH is a RISC processor targeted for use in embedded systems
 47           and consumer electronics; it was also used in the Sega Dreamcast
 48           gaming console.  The SuperH port has a home page at
 49           <http://www.linux-sh.org/>.
 50 
 51 config SUPERH32
 52         def_bool ARCH = "sh"
 53         select HAVE_KPROBES
 54         select HAVE_KRETPROBES
 55         select HAVE_IOREMAP_PROT if MMU && !X2TLB
 56         select HAVE_FUNCTION_TRACER
 57         select HAVE_FTRACE_MCOUNT_RECORD
 58         select HAVE_DYNAMIC_FTRACE
 59         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
 60         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
 61         select ARCH_WANT_IPC_PARSE_VERSION
 62         select HAVE_FUNCTION_GRAPH_TRACER
 63         select HAVE_ARCH_KGDB
 64         select HAVE_HW_BREAKPOINT
 65         select HAVE_MIXED_BREAKPOINTS_REGS
 66         select PERF_EVENTS
 67         select ARCH_HIBERNATION_POSSIBLE if MMU
 68         select SPARSE_IRQ
 69         select HAVE_CC_STACKPROTECTOR
 70 
 71 config SUPERH64
 72         def_bool ARCH = "sh64"
 73         select KALLSYMS
 74 
 75 config ARCH_DEFCONFIG
 76         string
 77         default "arch/sh/configs/shx3_defconfig" if SUPERH32
 78         default "arch/sh/configs/cayman_defconfig" if SUPERH64
 79 
 80 config RWSEM_GENERIC_SPINLOCK
 81         def_bool y
 82 
 83 config RWSEM_XCHGADD_ALGORITHM
 84         bool
 85 
 86 config GENERIC_BUG
 87         def_bool y
 88         depends on BUG && SUPERH32
 89 
 90 config GENERIC_CSUM
 91         def_bool y
 92         depends on SUPERH64
 93 
 94 config GENERIC_HWEIGHT
 95         def_bool y
 96 
 97 config GENERIC_CALIBRATE_DELAY
 98         bool
 99 
100 config GENERIC_LOCKBREAK
101         def_bool y
102         depends on SMP && PREEMPT
103 
104 config ARCH_SUSPEND_POSSIBLE
105         def_bool n
106 
107 config ARCH_HIBERNATION_POSSIBLE
108         def_bool n
109 
110 config SYS_SUPPORTS_APM_EMULATION
111         bool
112         select ARCH_SUSPEND_POSSIBLE
113 
114 config SYS_SUPPORTS_HUGETLBFS
115         bool
116 
117 config SYS_SUPPORTS_SMP
118         bool
119 
120 config SYS_SUPPORTS_NUMA
121         bool
122 
123 config SYS_SUPPORTS_PCI
124         bool
125 
126 config SYS_SUPPORTS_CMT
127         bool
128 
129 config SYS_SUPPORTS_MTU2
130         bool
131 
132 config SYS_SUPPORTS_TMU
133         bool
134 
135 config STACKTRACE_SUPPORT
136         def_bool y
137 
138 config LOCKDEP_SUPPORT
139         def_bool y
140 
141 config HAVE_LATENCYTOP_SUPPORT
142         def_bool y
143 
144 config ARCH_HAS_ILOG2_U32
145         def_bool n
146 
147 config ARCH_HAS_ILOG2_U64
148         def_bool n
149 
150 config NO_IOPORT
151         def_bool !PCI
152         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
153                    !SH_HP6XX && !SH_SOLUTION_ENGINE
154 
155 config IO_TRAPPED
156         bool
157 
158 config SWAP_IO_SPACE
159         bool
160 
161 config DMA_COHERENT
162         bool
163 
164 config DMA_NONCOHERENT
165         def_bool !DMA_COHERENT
166 
167 config NEED_DMA_MAP_STATE
168         def_bool DMA_NONCOHERENT
169 
170 config NEED_SG_DMA_LENGTH
171         def_bool y
172 
173 source "init/Kconfig"
174 
175 source "kernel/Kconfig.freezer"
176 
177 menu "System type"
178 
179 #
180 # Processor families
181 #
182 config CPU_SH2
183         bool
184 
185 config CPU_SH2A
186         bool
187         select CPU_SH2
188         select UNCACHED_MAPPING
189 
190 config CPU_SH3
191         bool
192         select CPU_HAS_INTEVT
193         select CPU_HAS_SR_RB
194         select SYS_SUPPORTS_TMU
195 
196 config CPU_SH4
197         bool
198         select CPU_HAS_INTEVT
199         select CPU_HAS_SR_RB
200         select CPU_HAS_FPU if !CPU_SH4AL_DSP
201         select SYS_SUPPORTS_TMU
202         select SYS_SUPPORTS_HUGETLBFS if MMU
203 
204 config CPU_SH4A
205         bool
206         select CPU_SH4
207 
208 config CPU_SH4AL_DSP
209         bool
210         select CPU_SH4A
211         select CPU_HAS_DSP
212 
213 config CPU_SH5
214         bool
215         select CPU_HAS_FPU
216         select SYS_SUPPORTS_TMU
217         select SYS_SUPPORTS_HUGETLBFS if MMU
218 
219 config CPU_SHX2
220         bool
221 
222 config CPU_SHX3
223         bool
224         select DMA_COHERENT
225         select SYS_SUPPORTS_SMP
226         select SYS_SUPPORTS_NUMA
227 
228 config ARCH_SHMOBILE
229         bool
230         select ARCH_SUSPEND_POSSIBLE
231         select PM
232         select PM_RUNTIME
233 
234 config CPU_HAS_PMU
235        depends on CPU_SH4 || CPU_SH4A
236        default y
237        bool
238 
239 if SUPERH32
240 
241 choice
242         prompt "Processor sub-type selection"
243 
244 #
245 # Processor subtypes
246 #
247 
248 # SH-2 Processor Support
249 
250 config CPU_SUBTYPE_SH7619
251         bool "Support SH7619 processor"
252         select CPU_SH2
253         select SYS_SUPPORTS_CMT
254 
255 # SH-2A Processor Support
256 
257 config CPU_SUBTYPE_SH7201
258         bool "Support SH7201 processor"
259         select CPU_SH2A
260         select CPU_HAS_FPU
261         select SYS_SUPPORTS_MTU2
262  
263 config CPU_SUBTYPE_SH7203
264         bool "Support SH7203 processor"
265         select CPU_SH2A
266         select CPU_HAS_FPU
267         select SYS_SUPPORTS_CMT
268         select SYS_SUPPORTS_MTU2
269         select ARCH_WANT_OPTIONAL_GPIOLIB
270         select PINCTRL
271 
272 config CPU_SUBTYPE_SH7206
273         bool "Support SH7206 processor"
274         select CPU_SH2A
275         select SYS_SUPPORTS_CMT
276         select SYS_SUPPORTS_MTU2
277 
278 config CPU_SUBTYPE_SH7263
279         bool "Support SH7263 processor"
280         select CPU_SH2A
281         select CPU_HAS_FPU
282         select SYS_SUPPORTS_CMT
283         select SYS_SUPPORTS_MTU2
284 
285 config CPU_SUBTYPE_SH7264
286         bool "Support SH7264 processor"
287         select CPU_SH2A
288         select CPU_HAS_FPU
289         select SYS_SUPPORTS_CMT
290         select SYS_SUPPORTS_MTU2
291         select PINCTRL
292 
293 config CPU_SUBTYPE_SH7269
294         bool "Support SH7269 processor"
295         select CPU_SH2A
296         select CPU_HAS_FPU
297         select SYS_SUPPORTS_CMT
298         select SYS_SUPPORTS_MTU2
299         select PINCTRL
300 
301 config CPU_SUBTYPE_MXG
302         bool "Support MX-G processor"
303         select CPU_SH2A
304         select SYS_SUPPORTS_MTU2
305         help
306           Select MX-G if running on an R8A03022BG part.
307 
308 # SH-3 Processor Support
309 
310 config CPU_SUBTYPE_SH7705
311         bool "Support SH7705 processor"
312         select CPU_SH3
313 
314 config CPU_SUBTYPE_SH7706
315         bool "Support SH7706 processor"
316         select CPU_SH3
317         help
318           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
319 
320 config CPU_SUBTYPE_SH7707
321         bool "Support SH7707 processor"
322         select CPU_SH3
323         help
324           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
325 
326 config CPU_SUBTYPE_SH7708
327         bool "Support SH7708 processor"
328         select CPU_SH3
329         help
330           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
331           if you have a 100 Mhz SH-3 HD6417708R CPU.
332 
333 config CPU_SUBTYPE_SH7709
334         bool "Support SH7709 processor"
335         select CPU_SH3
336         help
337           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
338 
339 config CPU_SUBTYPE_SH7710
340         bool "Support SH7710 processor"
341         select CPU_SH3
342         select CPU_HAS_DSP
343         help
344           Select SH7710 if you have a SH3-DSP SH7710 CPU.
345 
346 config CPU_SUBTYPE_SH7712
347         bool "Support SH7712 processor"
348         select CPU_SH3
349         select CPU_HAS_DSP
350         help
351           Select SH7712 if you have a SH3-DSP SH7712 CPU.
352 
353 config CPU_SUBTYPE_SH7720
354         bool "Support SH7720 processor"
355         select CPU_SH3
356         select CPU_HAS_DSP
357         select SYS_SUPPORTS_CMT
358         select ARCH_WANT_OPTIONAL_GPIOLIB
359         select USB_ARCH_HAS_OHCI
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 
365 config CPU_SUBTYPE_SH7721
366         bool "Support SH7721 processor"
367         select CPU_SH3
368         select CPU_HAS_DSP
369         select SYS_SUPPORTS_CMT
370         select USB_ARCH_HAS_OHCI
371         select USB_OHCI_SH if USB_OHCI_HCD
372         help
373           Select SH7721 if you have a SH3-DSP SH7721 CPU.
374 
375 # SH-4 Processor Support
376 
377 config CPU_SUBTYPE_SH7750
378         bool "Support SH7750 processor"
379         select CPU_SH4
380         help
381           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
382 
383 config CPU_SUBTYPE_SH7091
384         bool "Support SH7091 processor"
385         select CPU_SH4
386         help
387           Select SH7091 if you have an SH-4 based Sega device (such as
388           the Dreamcast, Naomi, and Naomi 2).
389 
390 config CPU_SUBTYPE_SH7750R
391         bool "Support SH7750R processor"
392         select CPU_SH4
393 
394 config CPU_SUBTYPE_SH7750S
395         bool "Support SH7750S processor"
396         select CPU_SH4
397 
398 config CPU_SUBTYPE_SH7751
399         bool "Support SH7751 processor"
400         select CPU_SH4
401         help
402           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
403           or if you have a HD6417751R CPU.
404 
405 config CPU_SUBTYPE_SH7751R
406         bool "Support SH7751R processor"
407         select CPU_SH4
408 
409 config CPU_SUBTYPE_SH7760
410         bool "Support SH7760 processor"
411         select CPU_SH4
412 
413 config CPU_SUBTYPE_SH4_202
414         bool "Support SH4-202 processor"
415         select CPU_SH4
416 
417 # SH-4A Processor Support
418 
419 config CPU_SUBTYPE_SH7723
420         bool "Support SH7723 processor"
421         select CPU_SH4A
422         select CPU_SHX2
423         select ARCH_SHMOBILE
424         select ARCH_SPARSEMEM_ENABLE
425         select SYS_SUPPORTS_CMT
426         select ARCH_WANT_OPTIONAL_GPIOLIB
427         select PINCTRL
428         help
429           Select SH7723 if you have an SH-MobileR2 CPU.
430 
431 config CPU_SUBTYPE_SH7724
432         bool "Support SH7724 processor"
433         select CPU_SH4A
434         select CPU_SHX2
435         select ARCH_SHMOBILE
436         select ARCH_SPARSEMEM_ENABLE
437         select SYS_SUPPORTS_CMT
438         select ARCH_WANT_OPTIONAL_GPIOLIB
439         select PINCTRL
440         help
441           Select SH7724 if you have an SH-MobileR2R CPU.
442 
443 config CPU_SUBTYPE_SH7734
444         bool "Support SH7734 processor"
445         select CPU_SH4A
446         select CPU_SHX2
447         select ARCH_WANT_OPTIONAL_GPIOLIB
448         select USB_ARCH_HAS_OHCI
449         select USB_ARCH_HAS_EHCI
450         select PINCTRL
451         help
452           Select SH7734 if you have a SH4A SH7734 CPU.
453 
454 config CPU_SUBTYPE_SH7757
455         bool "Support SH7757 processor"
456         select CPU_SH4A
457         select CPU_SHX2
458         select ARCH_WANT_OPTIONAL_GPIOLIB
459         select USB_ARCH_HAS_OHCI
460         select USB_ARCH_HAS_EHCI
461         select PINCTRL
462         help
463           Select SH7757 if you have a SH4A SH7757 CPU.
464 
465 config CPU_SUBTYPE_SH7763
466         bool "Support SH7763 processor"
467         select CPU_SH4A
468         select USB_ARCH_HAS_OHCI
469         select USB_OHCI_SH if USB_OHCI_HCD
470         help
471           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
472 
473 config CPU_SUBTYPE_SH7770
474         bool "Support SH7770 processor"
475         select CPU_SH4A
476 
477 config CPU_SUBTYPE_SH7780
478         bool "Support SH7780 processor"
479         select CPU_SH4A
480 
481 config CPU_SUBTYPE_SH7785
482         bool "Support SH7785 processor"
483         select CPU_SH4A
484         select CPU_SHX2
485         select ARCH_SPARSEMEM_ENABLE
486         select SYS_SUPPORTS_NUMA
487         select ARCH_WANT_OPTIONAL_GPIOLIB
488         select PINCTRL
489 
490 config CPU_SUBTYPE_SH7786
491         bool "Support SH7786 processor"
492         select CPU_SH4A
493         select CPU_SHX3
494         select CPU_HAS_PTEAEX
495         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
496         select ARCH_WANT_OPTIONAL_GPIOLIB
497         select USB_ARCH_HAS_OHCI
498         select USB_OHCI_SH if USB_OHCI_HCD
499         select USB_ARCH_HAS_EHCI
500         select USB_EHCI_SH if USB_EHCI_HCD
501         select PINCTRL
502 
503 config CPU_SUBTYPE_SHX3
504         bool "Support SH-X3 processor"
505         select CPU_SH4A
506         select CPU_SHX3
507         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
508         select ARCH_REQUIRE_GPIOLIB
509         select PINCTRL
510 
511 # SH4AL-DSP Processor Support
512 
513 config CPU_SUBTYPE_SH7343
514         bool "Support SH7343 processor"
515         select CPU_SH4AL_DSP
516         select ARCH_SHMOBILE
517         select SYS_SUPPORTS_CMT
518 
519 config CPU_SUBTYPE_SH7722
520         bool "Support SH7722 processor"
521         select CPU_SH4AL_DSP
522         select CPU_SHX2
523         select ARCH_SHMOBILE
524         select ARCH_SPARSEMEM_ENABLE
525         select SYS_SUPPORTS_NUMA
526         select SYS_SUPPORTS_CMT
527         select ARCH_WANT_OPTIONAL_GPIOLIB
528         select PINCTRL
529 
530 config CPU_SUBTYPE_SH7366
531         bool "Support SH7366 processor"
532         select CPU_SH4AL_DSP
533         select CPU_SHX2
534         select ARCH_SHMOBILE
535         select ARCH_SPARSEMEM_ENABLE
536         select SYS_SUPPORTS_NUMA
537         select SYS_SUPPORTS_CMT
538 
539 endchoice
540 
541 endif
542 
543 if SUPERH64
544 
545 choice
546         prompt "Processor sub-type selection"
547 
548 # SH-5 Processor Support
549 
550 config CPU_SUBTYPE_SH5_101
551         bool "Support SH5-101 processor"
552         select CPU_SH5
553 
554 config CPU_SUBTYPE_SH5_103
555         bool "Support SH5-103 processor"
556         select CPU_SH5
557 
558 endchoice
559 
560 endif
561 
562 source "arch/sh/mm/Kconfig"
563  
564 source "arch/sh/Kconfig.cpu"
565 
566 source "arch/sh/boards/Kconfig"
567 
568 menu "Timer and clock configuration"
569 
570 config SH_TIMER_TMU
571         bool "TMU timer driver"
572         depends on SYS_SUPPORTS_TMU
573         default y
574         help
575           This enables the build of the TMU timer driver.
576 
577 config SH_TIMER_CMT
578         bool "CMT timer driver"
579         depends on SYS_SUPPORTS_CMT
580         default y
581         help
582           This enables build of the CMT timer driver.
583 
584 config SH_TIMER_MTU2
585         bool "MTU2 timer driver"
586         depends on SYS_SUPPORTS_MTU2
587         default y
588         help
589           This enables build of the MTU2 timer driver.
590 
591 config SH_PCLK_FREQ
592         int "Peripheral clock frequency (in Hz)"
593         depends on SH_CLK_CPG_LEGACY
594         default "31250000" if CPU_SUBTYPE_SH7619
595         default "33333333" if CPU_SUBTYPE_SH7770 || \
596                               CPU_SUBTYPE_SH7760 || \
597                               CPU_SUBTYPE_SH7705 || \
598                               CPU_SUBTYPE_SH7203 || \
599                               CPU_SUBTYPE_SH7206 || \
600                               CPU_SUBTYPE_SH7263 || \
601                               CPU_SUBTYPE_MXG
602         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
603         default "66000000" if CPU_SUBTYPE_SH4_202
604         default "50000000"
605         help
606           This option is used to specify the peripheral clock frequency.
607           This is necessary for determining the reference clock value on
608           platforms lacking an RTC.
609 
610 config SH_CLK_CPG
611         def_bool y
612 
613 config SH_CLK_CPG_LEGACY
614         depends on SH_CLK_CPG
615         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
616                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
617                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
618                       !CPU_SUBTYPE_SH7269
619 
620 endmenu
621 
622 menu "CPU Frequency scaling"
623 source "drivers/cpufreq/Kconfig"
624 endmenu
625 
626 source "arch/sh/drivers/Kconfig"
627 
628 endmenu
629 
630 menu "Kernel features"
631 
632 source kernel/Kconfig.hz
633 
634 config KEXEC
635         bool "kexec system call (EXPERIMENTAL)"
636         depends on SUPERH32 && MMU
637         help
638           kexec is a system call that implements the ability to shutdown your
639           current kernel, and to start another kernel.  It is like a reboot
640           but it is independent of the system firmware.  And like a reboot
641           you can start any kernel with it, not just Linux.
642 
643           The name comes from the similarity to the exec system call.
644 
645           It is an ongoing process to be certain the hardware in a machine
646           is properly shutdown, so do not be surprised if this code does not
647           initially work for you.  As of this writing the exact hardware
648           interface is strongly in flux, so no good recommendation can be
649           made.
650 
651 config CRASH_DUMP
652         bool "kernel crash dumps (EXPERIMENTAL)"
653         depends on SUPERH32 && BROKEN_ON_SMP
654         help
655           Generate crash dump after being started by kexec.
656           This should be normally only set in special crash dump kernels
657           which are loaded in the main kernel with kexec-tools into
658           a specially reserved region and then later executed after
659           a crash by kdump/kexec. The crash dump kernel must be compiled
660           to a memory address not used by the main kernel using
661           PHYSICAL_START.
662 
663           For more details see Documentation/kdump/kdump.txt
664 
665 config KEXEC_JUMP
666         bool "kexec jump (EXPERIMENTAL)"
667         depends on SUPERH32 && KEXEC && HIBERNATION
668         help
669           Jump between original kernel and kexeced kernel and invoke
670           code via KEXEC
671 
672 config PHYSICAL_START
673         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
674         default MEMORY_START
675         ---help---
676           This gives the physical address where the kernel is loaded
677           and is ordinarily the same as MEMORY_START.
678 
679           Different values are primarily used in the case of kexec on panic
680           where the fail safe kernel needs to run at a different address
681           than the panic-ed kernel.
682 
683 config SECCOMP
684         bool "Enable seccomp to safely compute untrusted bytecode"
685         depends on PROC_FS
686         help
687           This kernel feature is useful for number crunching applications
688           that may need to compute untrusted bytecode during their
689           execution. By using pipes or other transports made available to
690           the process as file descriptors supporting the read/write
691           syscalls, it's possible to isolate those applications in
692           their own address space using seccomp. Once seccomp is
693           enabled via prctl, it cannot be disabled and the task is only
694           allowed to execute a few safe syscalls defined by each seccomp
695           mode.
696 
697           If unsure, say N.
698 
699 config SMP
700         bool "Symmetric multi-processing support"
701         depends on SYS_SUPPORTS_SMP
702         ---help---
703           This enables support for systems with more than one CPU. If you have
704           a system with only one CPU, say N. If you have a system with more
705           than one CPU, say Y.
706 
707           If you say N here, the kernel will run on uni- and multiprocessor
708           machines, but will use only one CPU of a multiprocessor machine. If
709           you say Y here, the kernel will run on many, but not all,
710           uniprocessor machines. On a uniprocessor machine, the kernel
711           will run faster if you say N here.
712 
713           People using multiprocessor machines who say Y here should also say
714           Y to "Enhanced Real Time Clock Support", below.
715 
716           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
717           available at <http://www.tldp.org/docs.html#howto>.
718 
719           If you don't know what to do here, say N.
720 
721 config NR_CPUS
722         int "Maximum number of CPUs (2-32)"
723         range 2 32
724         depends on SMP
725         default "4" if CPU_SUBTYPE_SHX3
726         default "2"
727         help
728           This allows you to specify the maximum number of CPUs which this
729           kernel will support.  The maximum supported value is 32 and the
730           minimum value which makes sense is 2.
731 
732           This is purely to save memory - each supported CPU adds
733           approximately eight kilobytes to the kernel image.
734 
735 config HOTPLUG_CPU
736         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
737         depends on SMP
738         help
739           Say Y here to experiment with turning CPUs off and on.  CPUs
740           can be controlled through /sys/devices/system/cpu.
741 
742 source "kernel/Kconfig.preempt"
743 
744 config GUSA
745         def_bool y
746         depends on !SMP && SUPERH32
747         help
748           This enables support for gUSA (general UserSpace Atomicity).
749           This is the default implementation for both UP and non-ll/sc
750           CPUs, and is used by the libc, amongst others.
751 
752           For additional information, design information can be found 
753           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
754 
755           This should only be disabled for special cases where alternate
756           atomicity implementations exist.
757 
758 config GUSA_RB
759         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
760         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
761         help
762           Enabling this option will allow the kernel to implement some
763           atomic operations using a software implementation of load-locked/
764           store-conditional (LLSC). On machines which do not have hardware
765           LLSC, this should be more efficient than the other alternative of
766           disabling interrupts around the atomic sequence.
767 
768 config HW_PERF_EVENTS
769         bool "Enable hardware performance counter support for perf events"
770         depends on PERF_EVENTS && CPU_HAS_PMU
771         default y
772         help
773           Enable hardware performance counter support for perf events. If
774           disabled, perf events will use software events only.
775 
776 source "drivers/sh/Kconfig"
777 
778 endmenu
779 
780 menu "Boot options"
781 
782 config ZERO_PAGE_OFFSET
783         hex
784         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
785                                 SH_7751_SOLUTION_ENGINE
786         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
787         default "0x00002000" if PAGE_SIZE_8KB
788         default "0x00001000"
789         help
790           This sets the default offset of zero page.
791 
792 config BOOT_LINK_OFFSET
793         hex
794         default "0x00210000" if SH_SHMIN
795         default "0x00400000" if SH_CAYMAN
796         default "0x00810000" if SH_7780_SOLUTION_ENGINE
797         default "0x009e0000" if SH_TITAN
798         default "0x01800000" if SH_SDK7780
799         default "0x02000000" if SH_EDOSK7760
800         default "0x00800000"
801         help
802           This option allows you to set the link address offset of the zImage.
803           This can be useful if you are on a board which has a small amount of
804           memory.
805 
806 config ENTRY_OFFSET
807         hex
808         default "0x00001000" if PAGE_SIZE_4KB
809         default "0x00002000" if PAGE_SIZE_8KB
810         default "0x00004000" if PAGE_SIZE_16KB
811         default "0x00010000" if PAGE_SIZE_64KB
812         default "0x00000000"
813 
814 config ROMIMAGE_MMCIF
815         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
816         depends on CPU_SUBTYPE_SH7724
817         help
818           Say Y here to include experimental MMCIF loading code in
819           romImage. With this enabled it is possible to write the romImage
820           kernel image to an MMC card and boot the kernel straight from
821           the reset vector. At reset the processor Mask ROM will load the
822           first part of the romImage which in turn loads the rest the kernel
823           image to RAM using the MMCIF hardware block.
824 
825 choice
826         prompt "Kernel command line"
827         optional
828         default CMDLINE_OVERWRITE
829         help
830           Setting this option allows the kernel command line arguments
831           to be set.
832 
833 config CMDLINE_OVERWRITE
834         bool "Overwrite bootloader kernel arguments"
835         help
836           Given string will overwrite any arguments passed in by
837           a bootloader.
838 
839 config CMDLINE_EXTEND
840         bool "Extend bootloader kernel arguments"
841         help
842           Given string will be concatenated with arguments passed in
843           by a bootloader.
844 
845 endchoice
846 
847 config CMDLINE
848         string "Kernel command line arguments string"
849         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
850         default "console=ttySC1,115200"
851 
852 endmenu
853 
854 menu "Bus options"
855 
856 config SUPERHYWAY
857         tristate "SuperHyway Bus support"
858         depends on CPU_SUBTYPE_SH4_202
859 
860 config MAPLE
861         bool "Maple Bus support"
862         depends on SH_DREAMCAST
863         help
864          The Maple Bus is SEGA's serial communication bus for peripherals
865          on the Dreamcast. Without this bus support you won't be able to
866          get your Dreamcast keyboard etc to work, so most users
867          probably want to say 'Y' here, unless you are only using the
868          Dreamcast with a serial line terminal or a remote network
869          connection.
870 
871 config PCI
872         bool "PCI support"
873         depends on SYS_SUPPORTS_PCI
874         select PCI_DOMAINS
875         select GENERIC_PCI_IOMAP
876         select NO_GENERIC_PCI_IOPORT_MAP
877         help
878           Find out whether you have a PCI motherboard. PCI is the name of a
879           bus system, i.e. the way the CPU talks to the other stuff inside
880           your box. If you have PCI, say Y, otherwise N.
881 
882 config PCI_DOMAINS
883         bool
884 
885 source "drivers/pci/pcie/Kconfig"
886 
887 source "drivers/pci/Kconfig"
888 
889 source "drivers/pcmcia/Kconfig"
890 
891 source "drivers/pci/hotplug/Kconfig"
892 
893 endmenu
894 
895 menu "Executable file formats"
896 
897 source "fs/Kconfig.binfmt"
898 
899 endmenu
900 
901 menu "Power management options (EXPERIMENTAL)"
902 
903 source "kernel/power/Kconfig"
904 
905 source "drivers/cpuidle/Kconfig"
906 
907 endmenu
908 
909 source "net/Kconfig"
910 
911 source "drivers/Kconfig"
912 
913 source "fs/Kconfig"
914 
915 source "arch/sh/Kconfig.debug"
916 
917 source "security/Kconfig"
918 
919 source "crypto/Kconfig"
920 
921 source "lib/Kconfig"

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