Kconfig 21 KB

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