Root/arch/sh/Kconfig

Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 9 years 1 day ago.
By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant.
1config SUPERH
2    def_bool y
3    select EXPERT
4    select CLKDEV_LOOKUP
5    select HAVE_IDE if HAS_IOPORT
6    select HAVE_MEMBLOCK
7    select HAVE_MEMBLOCK_NODE_MAP
8    select HAVE_OPROFILE
9    select HAVE_GENERIC_DMA_COHERENT
10    select HAVE_ARCH_TRACEHOOK
11    select HAVE_DMA_API_DEBUG
12    select HAVE_DMA_ATTRS
13    select HAVE_IRQ_WORK
14    select HAVE_PERF_EVENTS
15    select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
16    select PERF_USE_VMALLOC
17    select HAVE_KERNEL_GZIP
18    select HAVE_KERNEL_BZIP2
19    select HAVE_KERNEL_LZMA
20    select HAVE_KERNEL_XZ
21    select HAVE_KERNEL_LZO
22    select HAVE_SYSCALL_TRACEPOINTS
23    select HAVE_REGS_AND_STACK_ACCESS_API
24    select HAVE_GENERIC_HARDIRQS
25    select HAVE_SPARSE_IRQ
26    select IRQ_FORCED_THREADING
27    select RTC_LIB
28    select GENERIC_ATOMIC64
29    select GENERIC_IRQ_SHOW
30    help
31      The SuperH is a RISC processor targeted for use in embedded systems
32      and consumer electronics; it was also used in the Sega Dreamcast
33      gaming console. The SuperH port has a home page at
34      <http://www.linux-sh.org/>.
35
36config SUPERH32
37    def_bool ARCH = "sh"
38    select HAVE_KPROBES
39    select HAVE_KRETPROBES
40    select HAVE_IOREMAP_PROT if MMU && !X2TLB
41    select HAVE_FUNCTION_TRACER
42    select HAVE_FTRACE_MCOUNT_RECORD
43    select HAVE_DYNAMIC_FTRACE
44    select HAVE_FUNCTION_TRACE_MCOUNT_TEST
45    select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
46    select HAVE_FUNCTION_GRAPH_TRACER
47    select HAVE_ARCH_KGDB
48    select HAVE_HW_BREAKPOINT
49    select HAVE_MIXED_BREAKPOINTS_REGS
50    select PERF_EVENTS
51    select ARCH_HIBERNATION_POSSIBLE if MMU
52    select SPARSE_IRQ
53
54config SUPERH64
55    def_bool ARCH = "sh64"
56
57config ARCH_DEFCONFIG
58    string
59    default "arch/sh/configs/shx3_defconfig" if SUPERH32
60    default "arch/sh/configs/cayman_defconfig" if SUPERH64
61
62config RWSEM_GENERIC_SPINLOCK
63    def_bool y
64
65config RWSEM_XCHGADD_ALGORITHM
66    bool
67
68config GENERIC_BUG
69    def_bool y
70    depends on BUG && SUPERH32
71
72config GENERIC_CSUM
73    def_bool y
74    depends on SUPERH64
75
76config GENERIC_HWEIGHT
77    def_bool y
78
79config IRQ_PER_CPU
80    def_bool y
81
82config GENERIC_GPIO
83    def_bool n
84
85config GENERIC_CALIBRATE_DELAY
86    bool
87
88config GENERIC_CLOCKEVENTS
89    def_bool y
90
91config GENERIC_CLOCKEVENTS_BROADCAST
92    bool
93
94config GENERIC_CMOS_UPDATE
95    def_bool y
96    depends on SH_SH03 || SH_DREAMCAST
97
98config GENERIC_LOCKBREAK
99    def_bool y
100    depends on SMP && PREEMPT
101
102config ARCH_SUSPEND_POSSIBLE
103    def_bool n
104
105config ARCH_HIBERNATION_POSSIBLE
106    def_bool n
107
108config SYS_SUPPORTS_APM_EMULATION
109    bool
110    select ARCH_SUSPEND_POSSIBLE
111
112config SYS_SUPPORTS_HUGETLBFS
113    bool
114
115config SYS_SUPPORTS_SMP
116    bool
117
118config SYS_SUPPORTS_NUMA
119    bool
120
121config SYS_SUPPORTS_PCI
122    bool
123
124config SYS_SUPPORTS_CMT
125    bool
126
127config SYS_SUPPORTS_MTU2
128    bool
129
130config SYS_SUPPORTS_TMU
131    bool
132
133config STACKTRACE_SUPPORT
134    def_bool y
135
136config LOCKDEP_SUPPORT
137    def_bool y
138
139config HAVE_LATENCYTOP_SUPPORT
140    def_bool y
141
142config ARCH_HAS_ILOG2_U32
143    def_bool n
144
145config ARCH_HAS_ILOG2_U64
146    def_bool n
147
148config ARCH_NO_VIRT_TO_BUS
149    def_bool y
150
151config ARCH_HAS_DEFAULT_IDLE
152    def_bool y
153
154config ARCH_HAS_CPU_IDLE_WAIT
155    def_bool y
156
157config NO_IOPORT
158    def_bool !PCI
159    depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN
160
161config IO_TRAPPED
162    bool
163
164config DMA_COHERENT
165    bool
166
167config DMA_NONCOHERENT
168    def_bool !DMA_COHERENT
169
170config NEED_DMA_MAP_STATE
171    def_bool DMA_NONCOHERENT
172
173config NEED_SG_DMA_LENGTH
174    def_bool y
175
176source "init/Kconfig"
177
178source "kernel/Kconfig.freezer"
179
180menu "System type"
181
182#
183# Processor families
184#
185config CPU_SH2
186    bool
187
188config CPU_SH2A
189    bool
190    select CPU_SH2
191    select UNCACHED_MAPPING
192
193config CPU_SH3
194    bool
195    select CPU_HAS_INTEVT
196    select CPU_HAS_SR_RB
197    select SYS_SUPPORTS_TMU
198
199config CPU_SH4
200    bool
201    select CPU_HAS_INTEVT
202    select CPU_HAS_SR_RB
203    select CPU_HAS_FPU if !CPU_SH4AL_DSP
204    select SYS_SUPPORTS_TMU
205    select SYS_SUPPORTS_HUGETLBFS if MMU
206
207config CPU_SH4A
208    bool
209    select CPU_SH4
210
211config CPU_SH4AL_DSP
212    bool
213    select CPU_SH4A
214    select CPU_HAS_DSP
215
216config CPU_SH5
217    bool
218    select CPU_HAS_FPU
219    select SYS_SUPPORTS_TMU
220    select SYS_SUPPORTS_HUGETLBFS if MMU
221
222config CPU_SHX2
223    bool
224
225config CPU_SHX3
226    bool
227    select DMA_COHERENT
228    select SYS_SUPPORTS_SMP
229    select SYS_SUPPORTS_NUMA
230
231config ARCH_SHMOBILE
232    bool
233    select ARCH_SUSPEND_POSSIBLE
234    select PM
235    select PM_RUNTIME
236
237config CPU_HAS_PMU
238       depends on CPU_SH4 || CPU_SH4A
239       default y
240       bool
241
242if SUPERH32
243
244choice
245    prompt "Processor sub-type selection"
246
247#
248# Processor subtypes
249#
250
251# SH-2 Processor Support
252
253config CPU_SUBTYPE_SH7619
254    bool "Support SH7619 processor"
255    select CPU_SH2
256    select SYS_SUPPORTS_CMT
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_MTU2
265 
266config CPU_SUBTYPE_SH7203
267    bool "Support SH7203 processor"
268    select CPU_SH2A
269    select CPU_HAS_FPU
270    select SYS_SUPPORTS_CMT
271    select SYS_SUPPORTS_MTU2
272    select ARCH_WANT_OPTIONAL_GPIOLIB
273
274config CPU_SUBTYPE_SH7206
275    bool "Support SH7206 processor"
276    select CPU_SH2A
277    select SYS_SUPPORTS_CMT
278    select SYS_SUPPORTS_MTU2
279
280config CPU_SUBTYPE_SH7263
281    bool "Support SH7263 processor"
282    select CPU_SH2A
283    select CPU_HAS_FPU
284    select SYS_SUPPORTS_CMT
285    select SYS_SUPPORTS_MTU2
286
287config CPU_SUBTYPE_MXG
288    bool "Support MX-G processor"
289    select CPU_SH2A
290    select SYS_SUPPORTS_MTU2
291    help
292      Select MX-G if running on an R8A03022BG part.
293
294# SH-3 Processor Support
295
296config CPU_SUBTYPE_SH7705
297    bool "Support SH7705 processor"
298    select CPU_SH3
299
300config CPU_SUBTYPE_SH7706
301    bool "Support SH7706 processor"
302    select CPU_SH3
303    help
304      Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
305
306config CPU_SUBTYPE_SH7707
307    bool "Support SH7707 processor"
308    select CPU_SH3
309    help
310      Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
311
312config CPU_SUBTYPE_SH7708
313    bool "Support SH7708 processor"
314    select CPU_SH3
315    help
316      Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
317      if you have a 100 Mhz SH-3 HD6417708R CPU.
318
319config CPU_SUBTYPE_SH7709
320    bool "Support SH7709 processor"
321    select CPU_SH3
322    help
323      Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
324
325config CPU_SUBTYPE_SH7710
326    bool "Support SH7710 processor"
327    select CPU_SH3
328    select CPU_HAS_DSP
329    help
330      Select SH7710 if you have a SH3-DSP SH7710 CPU.
331
332config CPU_SUBTYPE_SH7712
333    bool "Support SH7712 processor"
334    select CPU_SH3
335    select CPU_HAS_DSP
336    help
337      Select SH7712 if you have a SH3-DSP SH7712 CPU.
338
339config CPU_SUBTYPE_SH7720
340    bool "Support SH7720 processor"
341    select CPU_SH3
342    select CPU_HAS_DSP
343    select SYS_SUPPORTS_CMT
344    select ARCH_WANT_OPTIONAL_GPIOLIB
345    select USB_ARCH_HAS_OHCI
346    select USB_OHCI_SH if USB_OHCI_HCD
347    help
348      Select SH7720 if you have a SH3-DSP SH7720 CPU.
349
350config CPU_SUBTYPE_SH7721
351    bool "Support SH7721 processor"
352    select CPU_SH3
353    select CPU_HAS_DSP
354    select SYS_SUPPORTS_CMT
355    select USB_ARCH_HAS_OHCI
356    select USB_OHCI_SH if USB_OHCI_HCD
357    help
358      Select SH7721 if you have a SH3-DSP SH7721 CPU.
359
360# SH-4 Processor Support
361
362config CPU_SUBTYPE_SH7750
363    bool "Support SH7750 processor"
364    select CPU_SH4
365    help
366      Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
367
368config CPU_SUBTYPE_SH7091
369    bool "Support SH7091 processor"
370    select CPU_SH4
371    help
372      Select SH7091 if you have an SH-4 based Sega device (such as
373      the Dreamcast, Naomi, and Naomi 2).
374
375config CPU_SUBTYPE_SH7750R
376    bool "Support SH7750R processor"
377    select CPU_SH4
378
379config CPU_SUBTYPE_SH7750S
380    bool "Support SH7750S processor"
381    select CPU_SH4
382
383config CPU_SUBTYPE_SH7751
384    bool "Support SH7751 processor"
385    select CPU_SH4
386    help
387      Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
388      or if you have a HD6417751R CPU.
389
390config CPU_SUBTYPE_SH7751R
391    bool "Support SH7751R processor"
392    select CPU_SH4
393
394config CPU_SUBTYPE_SH7760
395    bool "Support SH7760 processor"
396    select CPU_SH4
397
398config CPU_SUBTYPE_SH4_202
399    bool "Support SH4-202 processor"
400    select CPU_SH4
401
402# SH-4A Processor Support
403
404config CPU_SUBTYPE_SH7723
405    bool "Support SH7723 processor"
406    select CPU_SH4A
407    select CPU_SHX2
408    select ARCH_SHMOBILE
409    select ARCH_SPARSEMEM_ENABLE
410    select SYS_SUPPORTS_CMT
411    select ARCH_WANT_OPTIONAL_GPIOLIB
412    help
413      Select SH7723 if you have an SH-MobileR2 CPU.
414
415config CPU_SUBTYPE_SH7724
416    bool "Support SH7724 processor"
417    select CPU_SH4A
418    select CPU_SHX2
419    select ARCH_SHMOBILE
420    select ARCH_SPARSEMEM_ENABLE
421    select SYS_SUPPORTS_CMT
422    select ARCH_WANT_OPTIONAL_GPIOLIB
423    help
424      Select SH7724 if you have an SH-MobileR2R CPU.
425
426config CPU_SUBTYPE_SH7757
427    bool "Support SH7757 processor"
428    select CPU_SH4A
429    select CPU_SHX2
430    select ARCH_WANT_OPTIONAL_GPIOLIB
431    select USB_ARCH_HAS_OHCI
432    select USB_ARCH_HAS_EHCI
433    help
434      Select SH7757 if you have a SH4A SH7757 CPU.
435
436config CPU_SUBTYPE_SH7763
437    bool "Support SH7763 processor"
438    select CPU_SH4A
439    select USB_ARCH_HAS_OHCI
440    select USB_OHCI_SH if USB_OHCI_HCD
441    help
442      Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
443
444config CPU_SUBTYPE_SH7770
445    bool "Support SH7770 processor"
446    select CPU_SH4A
447
448config CPU_SUBTYPE_SH7780
449    bool "Support SH7780 processor"
450    select CPU_SH4A
451
452config CPU_SUBTYPE_SH7785
453    bool "Support SH7785 processor"
454    select CPU_SH4A
455    select CPU_SHX2
456    select ARCH_SPARSEMEM_ENABLE
457    select SYS_SUPPORTS_NUMA
458    select ARCH_WANT_OPTIONAL_GPIOLIB
459
460config CPU_SUBTYPE_SH7786
461    bool "Support SH7786 processor"
462    select CPU_SH4A
463    select CPU_SHX3
464    select CPU_HAS_PTEAEX
465    select GENERIC_CLOCKEVENTS_BROADCAST if SMP
466    select ARCH_WANT_OPTIONAL_GPIOLIB
467    select USB_ARCH_HAS_OHCI
468    select USB_OHCI_SH if USB_OHCI_HCD
469    select USB_ARCH_HAS_EHCI
470    select USB_EHCI_SH if USB_EHCI_HCD
471
472config CPU_SUBTYPE_SHX3
473    bool "Support SH-X3 processor"
474    select CPU_SH4A
475    select CPU_SHX3
476    select GENERIC_CLOCKEVENTS_BROADCAST if SMP
477    select ARCH_REQUIRE_GPIOLIB
478
479# SH4AL-DSP Processor Support
480
481config CPU_SUBTYPE_SH7343
482    bool "Support SH7343 processor"
483    select CPU_SH4AL_DSP
484    select ARCH_SHMOBILE
485    select SYS_SUPPORTS_CMT
486
487config CPU_SUBTYPE_SH7722
488    bool "Support SH7722 processor"
489    select CPU_SH4AL_DSP
490    select CPU_SHX2
491    select ARCH_SHMOBILE
492    select ARCH_SPARSEMEM_ENABLE
493    select SYS_SUPPORTS_NUMA
494    select SYS_SUPPORTS_CMT
495    select ARCH_WANT_OPTIONAL_GPIOLIB
496
497config CPU_SUBTYPE_SH7366
498    bool "Support SH7366 processor"
499    select CPU_SH4AL_DSP
500    select CPU_SHX2
501    select ARCH_SHMOBILE
502    select ARCH_SPARSEMEM_ENABLE
503    select SYS_SUPPORTS_NUMA
504    select SYS_SUPPORTS_CMT
505
506endchoice
507
508endif
509
510if SUPERH64
511
512choice
513    prompt "Processor sub-type selection"
514
515# SH-5 Processor Support
516
517config CPU_SUBTYPE_SH5_101
518    bool "Support SH5-101 processor"
519    select CPU_SH5
520
521config CPU_SUBTYPE_SH5_103
522    bool "Support SH5-103 processor"
523    select CPU_SH5
524
525endchoice
526
527endif
528
529source "arch/sh/mm/Kconfig"
530 
531source "arch/sh/Kconfig.cpu"
532
533source "arch/sh/boards/Kconfig"
534
535menu "Timer and clock configuration"
536
537config SH_TIMER_TMU
538    bool "TMU timer driver"
539    depends on SYS_SUPPORTS_TMU
540    default y
541    help
542      This enables the build of the TMU timer driver.
543
544config SH_TIMER_CMT
545    bool "CMT timer driver"
546    depends on SYS_SUPPORTS_CMT
547    default y
548    help
549      This enables build of the CMT timer driver.
550
551config SH_TIMER_MTU2
552    bool "MTU2 timer driver"
553    depends on SYS_SUPPORTS_MTU2
554    default y
555    help
556      This enables build of the MTU2 timer driver.
557
558config SH_PCLK_FREQ
559    int "Peripheral clock frequency (in Hz)"
560    depends on SH_CLK_CPG_LEGACY
561    default "31250000" if CPU_SUBTYPE_SH7619
562    default "33333333" if CPU_SUBTYPE_SH7770 || \
563                  CPU_SUBTYPE_SH7760 || \
564                  CPU_SUBTYPE_SH7705 || \
565                  CPU_SUBTYPE_SH7203 || \
566                  CPU_SUBTYPE_SH7206 || \
567                  CPU_SUBTYPE_SH7263 || \
568                  CPU_SUBTYPE_MXG
569    default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
570    default "66000000" if CPU_SUBTYPE_SH4_202
571    default "50000000"
572    help
573      This option is used to specify the peripheral clock frequency.
574      This is necessary for determining the reference clock value on
575      platforms lacking an RTC.
576
577config SH_CLK_CPG
578    def_bool y
579
580config SH_CLK_CPG_LEGACY
581    depends on SH_CLK_CPG
582    def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
583              !CPU_SHX3 && !CPU_SUBTYPE_SH7757
584
585source "kernel/time/Kconfig"
586
587endmenu
588
589menu "CPU Frequency scaling"
590
591source "drivers/cpufreq/Kconfig"
592
593config SH_CPU_FREQ
594    tristate "SuperH CPU Frequency driver"
595    depends on CPU_FREQ
596    select CPU_FREQ_TABLE
597    help
598      This adds the cpufreq driver for SuperH. Any CPU that supports
599      clock rate rounding through the clock framework can use this
600      driver. While it will make the kernel slightly larger, this is
601      harmless for CPUs that don't support rate rounding. The driver
602      will also generate a notice in the boot log before disabling
603      itself if the CPU in question is not capable of rate rounding.
604
605      For details, take a look at <file:Documentation/cpu-freq>.
606
607      If unsure, say N.
608
609endmenu
610
611source "arch/sh/drivers/Kconfig"
612
613endmenu
614
615menu "Kernel features"
616
617source kernel/Kconfig.hz
618
619config KEXEC
620    bool "kexec system call (EXPERIMENTAL)"
621    depends on SUPERH32 && EXPERIMENTAL && MMU
622    help
623      kexec is a system call that implements the ability to shutdown your
624      current kernel, and to start another kernel. It is like a reboot
625      but it is independent of the system firmware. And like a reboot
626      you can start any kernel with it, not just Linux.
627
628      The name comes from the similarity to the exec system call.
629
630      It is an ongoing process to be certain the hardware in a machine
631      is properly shutdown, so do not be surprised if this code does not
632      initially work for you. It may help to enable device hotplugging
633      support. As of this writing the exact hardware interface is
634      strongly in flux, so no good recommendation can be made.
635
636config CRASH_DUMP
637    bool "kernel crash dumps (EXPERIMENTAL)"
638    depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
639    help
640      Generate crash dump after being started by kexec.
641      This should be normally only set in special crash dump kernels
642      which are loaded in the main kernel with kexec-tools into
643      a specially reserved region and then later executed after
644      a crash by kdump/kexec. The crash dump kernel must be compiled
645      to a memory address not used by the main kernel using
646      PHYSICAL_START.
647
648      For more details see Documentation/kdump/kdump.txt
649
650config KEXEC_JUMP
651    bool "kexec jump (EXPERIMENTAL)"
652    depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
653    help
654      Jump between original kernel and kexeced kernel and invoke
655      code via KEXEC
656
657config PHYSICAL_START
658    hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
659    default MEMORY_START
660    ---help---
661      This gives the physical address where the kernel is loaded
662      and is ordinarily the same as MEMORY_START.
663
664      Different values are primarily used in the case of kexec on panic
665      where the fail safe kernel needs to run at a different address
666      than the panic-ed kernel.
667
668config SECCOMP
669    bool "Enable seccomp to safely compute untrusted bytecode"
670    depends on PROC_FS
671    help
672      This kernel feature is useful for number crunching applications
673      that may need to compute untrusted bytecode during their
674      execution. By using pipes or other transports made available to
675      the process as file descriptors supporting the read/write
676      syscalls, it's possible to isolate those applications in
677      their own address space using seccomp. Once seccomp is
678      enabled via prctl, it cannot be disabled and the task is only
679      allowed to execute a few safe syscalls defined by each seccomp
680      mode.
681
682      If unsure, say N.
683
684config SMP
685    bool "Symmetric multi-processing support"
686    depends on SYS_SUPPORTS_SMP
687    select USE_GENERIC_SMP_HELPERS
688    ---help---
689      This enables support for systems with more than one CPU. If you have
690      a system with only one CPU, like most personal computers, say N. If
691      you have a system with more than one CPU, say Y.
692
693      If you say N here, the kernel will run on single and multiprocessor
694      machines, but will use only one CPU of a multiprocessor machine. If
695      you say Y here, the kernel will run on many, but not all,
696      singleprocessor machines. On a singleprocessor machine, the kernel
697      will run faster if you say N here.
698
699      People using multiprocessor machines who say Y here should also say
700      Y to "Enhanced Real Time Clock Support", below.
701
702      See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
703      available at <http://www.tldp.org/docs.html#howto>.
704
705      If you don't know what to do here, say N.
706
707config NR_CPUS
708    int "Maximum number of CPUs (2-32)"
709    range 2 32
710    depends on SMP
711    default "4" if CPU_SUBTYPE_SHX3
712    default "2"
713    help
714      This allows you to specify the maximum number of CPUs which this
715      kernel will support. The maximum supported value is 32 and the
716      minimum value which makes sense is 2.
717
718      This is purely to save memory - each supported CPU adds
719      approximately eight kilobytes to the kernel image.
720
721config HOTPLUG_CPU
722    bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
723    depends on SMP && HOTPLUG && EXPERIMENTAL
724    help
725      Say Y here to experiment with turning CPUs off and on. CPUs
726      can be controlled through /sys/devices/system/cpu.
727
728source "kernel/Kconfig.preempt"
729
730config GUSA
731    def_bool y
732    depends on !SMP && SUPERH32
733    help
734      This enables support for gUSA (general UserSpace Atomicity).
735      This is the default implementation for both UP and non-ll/sc
736      CPUs, and is used by the libc, amongst others.
737
738      For additional information, design information can be found
739      in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
740
741      This should only be disabled for special cases where alternate
742      atomicity implementations exist.
743
744config GUSA_RB
745    bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
746    depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
747    help
748      Enabling this option will allow the kernel to implement some
749      atomic operations using a software implementation of load-locked/
750      store-conditional (LLSC). On machines which do not have hardware
751      LLSC, this should be more efficient than the other alternative of
752      disabling interrupts around the atomic sequence.
753
754config HW_PERF_EVENTS
755    bool "Enable hardware performance counter support for perf events"
756    depends on PERF_EVENTS && CPU_HAS_PMU
757    default y
758    help
759      Enable hardware performance counter support for perf events. If
760      disabled, perf events will use software events only.
761
762source "drivers/sh/Kconfig"
763
764endmenu
765
766menu "Boot options"
767
768config ZERO_PAGE_OFFSET
769    hex
770    default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
771                SH_7751_SOLUTION_ENGINE
772    default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
773    default "0x00002000" if PAGE_SIZE_8KB
774    default "0x00001000"
775    help
776      This sets the default offset of zero page.
777
778config BOOT_LINK_OFFSET
779    hex
780    default "0x00210000" if SH_SHMIN
781    default "0x00400000" if SH_CAYMAN
782    default "0x00810000" if SH_7780_SOLUTION_ENGINE
783    default "0x009e0000" if SH_TITAN
784    default "0x01800000" if SH_SDK7780
785    default "0x02000000" if SH_EDOSK7760
786    default "0x00800000"
787    help
788      This option allows you to set the link address offset of the zImage.
789      This can be useful if you are on a board which has a small amount of
790      memory.
791
792config ENTRY_OFFSET
793    hex
794    default "0x00001000" if PAGE_SIZE_4KB
795    default "0x00002000" if PAGE_SIZE_8KB
796    default "0x00004000" if PAGE_SIZE_16KB
797    default "0x00010000" if PAGE_SIZE_64KB
798    default "0x00000000"
799
800config ROMIMAGE_MMCIF
801    bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
802    depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
803    help
804      Say Y here to include experimental MMCIF loading code in
805      romImage. With this enabled it is possible to write the romImage
806      kernel image to an MMC card and boot the kernel straight from
807      the reset vector. At reset the processor Mask ROM will load the
808      first part of the romImage which in turn loads the rest the kernel
809      image to RAM using the MMCIF hardware block.
810
811choice
812    prompt "Kernel command line"
813    optional
814    default CMDLINE_OVERWRITE
815    help
816      Setting this option allows the kernel command line arguments
817      to be set.
818
819config CMDLINE_OVERWRITE
820    bool "Overwrite bootloader kernel arguments"
821    help
822      Given string will overwrite any arguments passed in by
823      a bootloader.
824
825config CMDLINE_EXTEND
826    bool "Extend bootloader kernel arguments"
827    help
828      Given string will be concatenated with arguments passed in
829      by a bootloader.
830
831endchoice
832
833config CMDLINE
834    string "Kernel command line arguments string"
835    depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
836    default "console=ttySC1,115200"
837
838endmenu
839
840menu "Bus options"
841
842config SUPERHYWAY
843    tristate "SuperHyway Bus support"
844    depends on CPU_SUBTYPE_SH4_202
845
846config MAPLE
847    bool "Maple Bus support"
848    depends on SH_DREAMCAST
849    help
850     The Maple Bus is SEGA's serial communication bus for peripherals
851     on the Dreamcast. Without this bus support you won't be able to
852     get your Dreamcast keyboard etc to work, so most users
853     probably want to say 'Y' here, unless you are only using the
854     Dreamcast with a serial line terminal or a remote network
855     connection.
856
857config PCI
858    bool "PCI support"
859    depends on SYS_SUPPORTS_PCI
860    select PCI_DOMAINS
861    select GENERIC_PCI_IOMAP
862    select NO_GENERIC_PCI_IOPORT_MAP
863    help
864      Find out whether you have a PCI motherboard. PCI is the name of a
865      bus system, i.e. the way the CPU talks to the other stuff inside
866      your box. If you have PCI, say Y, otherwise N.
867
868config PCI_DOMAINS
869    bool
870
871source "drivers/pci/pcie/Kconfig"
872
873source "drivers/pci/Kconfig"
874
875source "drivers/pcmcia/Kconfig"
876
877source "drivers/pci/hotplug/Kconfig"
878
879endmenu
880
881menu "Executable file formats"
882
883source "fs/Kconfig.binfmt"
884
885endmenu
886
887menu "Power management options (EXPERIMENTAL)"
888depends on EXPERIMENTAL
889
890source "kernel/power/Kconfig"
891
892source "drivers/cpuidle/Kconfig"
893
894endmenu
895
896source "net/Kconfig"
897
898source "drivers/Kconfig"
899
900source "fs/Kconfig"
901
902source "arch/sh/Kconfig.debug"
903
904source "security/Kconfig"
905
906source "crypto/Kconfig"
907
908source "lib/Kconfig"
909

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