Kconfig 22 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_CUSTOM_GPIO_H
  17. select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  18. select PERF_USE_VMALLOC
  19. select HAVE_KERNEL_GZIP
  20. select HAVE_KERNEL_BZIP2
  21. select HAVE_KERNEL_LZMA
  22. select HAVE_KERNEL_XZ
  23. select HAVE_KERNEL_LZO
  24. select HAVE_SYSCALL_TRACEPOINTS
  25. select HAVE_REGS_AND_STACK_ACCESS_API
  26. select HAVE_GENERIC_HARDIRQS
  27. select MAY_HAVE_SPARSE_IRQ
  28. select IRQ_FORCED_THREADING
  29. select RTC_LIB
  30. select GENERIC_ATOMIC64
  31. select GENERIC_IRQ_SHOW
  32. select GENERIC_SMP_IDLE_THREAD
  33. select GENERIC_CLOCKEVENTS
  34. select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  35. help
  36. The SuperH is a RISC processor targeted for use in embedded systems
  37. and consumer electronics; it was also used in the Sega Dreamcast
  38. gaming console. The SuperH port has a home page at
  39. <http://www.linux-sh.org/>.
  40. config SUPERH32
  41. def_bool ARCH = "sh"
  42. select HAVE_KPROBES
  43. select HAVE_KRETPROBES
  44. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  45. select HAVE_FUNCTION_TRACER
  46. select HAVE_FTRACE_MCOUNT_RECORD
  47. select HAVE_DYNAMIC_FTRACE
  48. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  49. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  50. select HAVE_FUNCTION_GRAPH_TRACER
  51. select HAVE_ARCH_KGDB
  52. select HAVE_HW_BREAKPOINT
  53. select HAVE_MIXED_BREAKPOINTS_REGS
  54. select PERF_EVENTS
  55. select ARCH_HIBERNATION_POSSIBLE if MMU
  56. select SPARSE_IRQ
  57. config SUPERH64
  58. def_bool ARCH = "sh64"
  59. config ARCH_DEFCONFIG
  60. string
  61. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  62. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  63. config RWSEM_GENERIC_SPINLOCK
  64. def_bool y
  65. config RWSEM_XCHGADD_ALGORITHM
  66. bool
  67. config GENERIC_BUG
  68. def_bool y
  69. depends on BUG && SUPERH32
  70. config GENERIC_CSUM
  71. def_bool y
  72. depends on SUPERH64
  73. config GENERIC_HWEIGHT
  74. def_bool y
  75. config IRQ_PER_CPU
  76. def_bool y
  77. config GENERIC_GPIO
  78. def_bool n
  79. config GENERIC_CALIBRATE_DELAY
  80. bool
  81. config GENERIC_LOCKBREAK
  82. def_bool y
  83. depends on SMP && PREEMPT
  84. config ARCH_SUSPEND_POSSIBLE
  85. def_bool n
  86. config ARCH_HIBERNATION_POSSIBLE
  87. def_bool n
  88. config SYS_SUPPORTS_APM_EMULATION
  89. bool
  90. select ARCH_SUSPEND_POSSIBLE
  91. config SYS_SUPPORTS_HUGETLBFS
  92. bool
  93. config SYS_SUPPORTS_SMP
  94. bool
  95. config SYS_SUPPORTS_NUMA
  96. bool
  97. config SYS_SUPPORTS_PCI
  98. bool
  99. config SYS_SUPPORTS_CMT
  100. bool
  101. config SYS_SUPPORTS_MTU2
  102. bool
  103. config SYS_SUPPORTS_TMU
  104. bool
  105. config STACKTRACE_SUPPORT
  106. def_bool y
  107. config LOCKDEP_SUPPORT
  108. def_bool y
  109. config HAVE_LATENCYTOP_SUPPORT
  110. def_bool y
  111. config ARCH_HAS_ILOG2_U32
  112. def_bool n
  113. config ARCH_HAS_ILOG2_U64
  114. def_bool n
  115. config ARCH_NO_VIRT_TO_BUS
  116. def_bool y
  117. config ARCH_HAS_DEFAULT_IDLE
  118. def_bool y
  119. config NO_IOPORT
  120. def_bool !PCI
  121. depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
  122. !SH_HP6XX && !SH_SOLUTION_ENGINE
  123. config IO_TRAPPED
  124. bool
  125. config SWAP_IO_SPACE
  126. bool
  127. config DMA_COHERENT
  128. bool
  129. config DMA_NONCOHERENT
  130. def_bool !DMA_COHERENT
  131. config NEED_DMA_MAP_STATE
  132. def_bool DMA_NONCOHERENT
  133. config NEED_SG_DMA_LENGTH
  134. def_bool y
  135. source "init/Kconfig"
  136. source "kernel/Kconfig.freezer"
  137. menu "System type"
  138. #
  139. # Processor families
  140. #
  141. config CPU_SH2
  142. bool
  143. config CPU_SH2A
  144. bool
  145. select CPU_SH2
  146. select UNCACHED_MAPPING
  147. config CPU_SH3
  148. bool
  149. select CPU_HAS_INTEVT
  150. select CPU_HAS_SR_RB
  151. select SYS_SUPPORTS_TMU
  152. config CPU_SH4
  153. bool
  154. select CPU_HAS_INTEVT
  155. select CPU_HAS_SR_RB
  156. select CPU_HAS_FPU if !CPU_SH4AL_DSP
  157. select SYS_SUPPORTS_TMU
  158. select SYS_SUPPORTS_HUGETLBFS if MMU
  159. config CPU_SH4A
  160. bool
  161. select CPU_SH4
  162. config CPU_SH4AL_DSP
  163. bool
  164. select CPU_SH4A
  165. select CPU_HAS_DSP
  166. config CPU_SH5
  167. bool
  168. select CPU_HAS_FPU
  169. select SYS_SUPPORTS_TMU
  170. select SYS_SUPPORTS_HUGETLBFS if MMU
  171. config CPU_SHX2
  172. bool
  173. config CPU_SHX3
  174. bool
  175. select DMA_COHERENT
  176. select SYS_SUPPORTS_SMP
  177. select SYS_SUPPORTS_NUMA
  178. config ARCH_SHMOBILE
  179. bool
  180. select ARCH_SUSPEND_POSSIBLE
  181. select PM
  182. select PM_RUNTIME
  183. config CPU_HAS_PMU
  184. depends on CPU_SH4 || CPU_SH4A
  185. default y
  186. bool
  187. if SUPERH32
  188. choice
  189. prompt "Processor sub-type selection"
  190. #
  191. # Processor subtypes
  192. #
  193. # SH-2 Processor Support
  194. config CPU_SUBTYPE_SH7619
  195. bool "Support SH7619 processor"
  196. select CPU_SH2
  197. select SYS_SUPPORTS_CMT
  198. # SH-2A Processor Support
  199. config CPU_SUBTYPE_SH7201
  200. bool "Support SH7201 processor"
  201. select CPU_SH2A
  202. select CPU_HAS_FPU
  203. select SYS_SUPPORTS_MTU2
  204. config CPU_SUBTYPE_SH7203
  205. bool "Support SH7203 processor"
  206. select CPU_SH2A
  207. select CPU_HAS_FPU
  208. select SYS_SUPPORTS_CMT
  209. select SYS_SUPPORTS_MTU2
  210. select ARCH_WANT_OPTIONAL_GPIOLIB
  211. config CPU_SUBTYPE_SH7206
  212. bool "Support SH7206 processor"
  213. select CPU_SH2A
  214. select SYS_SUPPORTS_CMT
  215. select SYS_SUPPORTS_MTU2
  216. config CPU_SUBTYPE_SH7263
  217. bool "Support SH7263 processor"
  218. select CPU_SH2A
  219. select CPU_HAS_FPU
  220. select SYS_SUPPORTS_CMT
  221. select SYS_SUPPORTS_MTU2
  222. config CPU_SUBTYPE_SH7264
  223. bool "Support SH7264 processor"
  224. select CPU_SH2A
  225. select CPU_HAS_FPU
  226. select SYS_SUPPORTS_CMT
  227. select SYS_SUPPORTS_MTU2
  228. config CPU_SUBTYPE_SH7269
  229. bool "Support SH7269 processor"
  230. select CPU_SH2A
  231. select CPU_HAS_FPU
  232. select SYS_SUPPORTS_CMT
  233. select SYS_SUPPORTS_MTU2
  234. config CPU_SUBTYPE_MXG
  235. bool "Support MX-G processor"
  236. select CPU_SH2A
  237. select SYS_SUPPORTS_MTU2
  238. help
  239. Select MX-G if running on an R8A03022BG part.
  240. # SH-3 Processor Support
  241. config CPU_SUBTYPE_SH7705
  242. bool "Support SH7705 processor"
  243. select CPU_SH3
  244. config CPU_SUBTYPE_SH7706
  245. bool "Support SH7706 processor"
  246. select CPU_SH3
  247. help
  248. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  249. config CPU_SUBTYPE_SH7707
  250. bool "Support SH7707 processor"
  251. select CPU_SH3
  252. help
  253. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  254. config CPU_SUBTYPE_SH7708
  255. bool "Support SH7708 processor"
  256. select CPU_SH3
  257. help
  258. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  259. if you have a 100 Mhz SH-3 HD6417708R CPU.
  260. config CPU_SUBTYPE_SH7709
  261. bool "Support SH7709 processor"
  262. select CPU_SH3
  263. help
  264. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  265. config CPU_SUBTYPE_SH7710
  266. bool "Support SH7710 processor"
  267. select CPU_SH3
  268. select CPU_HAS_DSP
  269. help
  270. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  271. config CPU_SUBTYPE_SH7712
  272. bool "Support SH7712 processor"
  273. select CPU_SH3
  274. select CPU_HAS_DSP
  275. help
  276. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  277. config CPU_SUBTYPE_SH7720
  278. bool "Support SH7720 processor"
  279. select CPU_SH3
  280. select CPU_HAS_DSP
  281. select SYS_SUPPORTS_CMT
  282. select ARCH_WANT_OPTIONAL_GPIOLIB
  283. select USB_ARCH_HAS_OHCI
  284. select USB_OHCI_SH if USB_OHCI_HCD
  285. help
  286. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  287. config CPU_SUBTYPE_SH7721
  288. bool "Support SH7721 processor"
  289. select CPU_SH3
  290. select CPU_HAS_DSP
  291. select SYS_SUPPORTS_CMT
  292. select USB_ARCH_HAS_OHCI
  293. select USB_OHCI_SH if USB_OHCI_HCD
  294. help
  295. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  296. # SH-4 Processor Support
  297. config CPU_SUBTYPE_SH7750
  298. bool "Support SH7750 processor"
  299. select CPU_SH4
  300. help
  301. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  302. config CPU_SUBTYPE_SH7091
  303. bool "Support SH7091 processor"
  304. select CPU_SH4
  305. help
  306. Select SH7091 if you have an SH-4 based Sega device (such as
  307. the Dreamcast, Naomi, and Naomi 2).
  308. config CPU_SUBTYPE_SH7750R
  309. bool "Support SH7750R processor"
  310. select CPU_SH4
  311. config CPU_SUBTYPE_SH7750S
  312. bool "Support SH7750S processor"
  313. select CPU_SH4
  314. config CPU_SUBTYPE_SH7751
  315. bool "Support SH7751 processor"
  316. select CPU_SH4
  317. help
  318. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  319. or if you have a HD6417751R CPU.
  320. config CPU_SUBTYPE_SH7751R
  321. bool "Support SH7751R processor"
  322. select CPU_SH4
  323. config CPU_SUBTYPE_SH7760
  324. bool "Support SH7760 processor"
  325. select CPU_SH4
  326. config CPU_SUBTYPE_SH4_202
  327. bool "Support SH4-202 processor"
  328. select CPU_SH4
  329. # SH-4A Processor Support
  330. config CPU_SUBTYPE_SH7723
  331. bool "Support SH7723 processor"
  332. select CPU_SH4A
  333. select CPU_SHX2
  334. select ARCH_SHMOBILE
  335. select ARCH_SPARSEMEM_ENABLE
  336. select SYS_SUPPORTS_CMT
  337. select ARCH_WANT_OPTIONAL_GPIOLIB
  338. help
  339. Select SH7723 if you have an SH-MobileR2 CPU.
  340. config CPU_SUBTYPE_SH7724
  341. bool "Support SH7724 processor"
  342. select CPU_SH4A
  343. select CPU_SHX2
  344. select ARCH_SHMOBILE
  345. select ARCH_SPARSEMEM_ENABLE
  346. select SYS_SUPPORTS_CMT
  347. select ARCH_WANT_OPTIONAL_GPIOLIB
  348. help
  349. Select SH7724 if you have an SH-MobileR2R CPU.
  350. config CPU_SUBTYPE_SH7734
  351. bool "Support SH7734 processor"
  352. select CPU_SH4A
  353. select CPU_SHX2
  354. select ARCH_WANT_OPTIONAL_GPIOLIB
  355. select USB_ARCH_HAS_OHCI
  356. select USB_ARCH_HAS_EHCI
  357. help
  358. Select SH7734 if you have a SH4A SH7734 CPU.
  359. config CPU_SUBTYPE_SH7757
  360. bool "Support SH7757 processor"
  361. select CPU_SH4A
  362. select CPU_SHX2
  363. select ARCH_WANT_OPTIONAL_GPIOLIB
  364. select USB_ARCH_HAS_OHCI
  365. select USB_ARCH_HAS_EHCI
  366. help
  367. Select SH7757 if you have a SH4A SH7757 CPU.
  368. config CPU_SUBTYPE_SH7763
  369. bool "Support SH7763 processor"
  370. select CPU_SH4A
  371. select USB_ARCH_HAS_OHCI
  372. select USB_OHCI_SH if USB_OHCI_HCD
  373. help
  374. Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
  375. config CPU_SUBTYPE_SH7770
  376. bool "Support SH7770 processor"
  377. select CPU_SH4A
  378. config CPU_SUBTYPE_SH7780
  379. bool "Support SH7780 processor"
  380. select CPU_SH4A
  381. config CPU_SUBTYPE_SH7785
  382. bool "Support SH7785 processor"
  383. select CPU_SH4A
  384. select CPU_SHX2
  385. select ARCH_SPARSEMEM_ENABLE
  386. select SYS_SUPPORTS_NUMA
  387. select ARCH_WANT_OPTIONAL_GPIOLIB
  388. config CPU_SUBTYPE_SH7786
  389. bool "Support SH7786 processor"
  390. select CPU_SH4A
  391. select CPU_SHX3
  392. select CPU_HAS_PTEAEX
  393. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  394. select ARCH_WANT_OPTIONAL_GPIOLIB
  395. select USB_ARCH_HAS_OHCI
  396. select USB_OHCI_SH if USB_OHCI_HCD
  397. select USB_ARCH_HAS_EHCI
  398. select USB_EHCI_SH if USB_EHCI_HCD
  399. config CPU_SUBTYPE_SHX3
  400. bool "Support SH-X3 processor"
  401. select CPU_SH4A
  402. select CPU_SHX3
  403. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  404. select ARCH_REQUIRE_GPIOLIB
  405. # SH4AL-DSP Processor Support
  406. config CPU_SUBTYPE_SH7343
  407. bool "Support SH7343 processor"
  408. select CPU_SH4AL_DSP
  409. select ARCH_SHMOBILE
  410. select SYS_SUPPORTS_CMT
  411. config CPU_SUBTYPE_SH7722
  412. bool "Support SH7722 processor"
  413. select CPU_SH4AL_DSP
  414. select CPU_SHX2
  415. select ARCH_SHMOBILE
  416. select ARCH_SPARSEMEM_ENABLE
  417. select SYS_SUPPORTS_NUMA
  418. select SYS_SUPPORTS_CMT
  419. select ARCH_WANT_OPTIONAL_GPIOLIB
  420. config CPU_SUBTYPE_SH7366
  421. bool "Support SH7366 processor"
  422. select CPU_SH4AL_DSP
  423. select CPU_SHX2
  424. select ARCH_SHMOBILE
  425. select ARCH_SPARSEMEM_ENABLE
  426. select SYS_SUPPORTS_NUMA
  427. select SYS_SUPPORTS_CMT
  428. endchoice
  429. endif
  430. if SUPERH64
  431. choice
  432. prompt "Processor sub-type selection"
  433. # SH-5 Processor Support
  434. config CPU_SUBTYPE_SH5_101
  435. bool "Support SH5-101 processor"
  436. select CPU_SH5
  437. config CPU_SUBTYPE_SH5_103
  438. bool "Support SH5-103 processor"
  439. select CPU_SH5
  440. endchoice
  441. endif
  442. source "arch/sh/mm/Kconfig"
  443. source "arch/sh/Kconfig.cpu"
  444. source "arch/sh/boards/Kconfig"
  445. menu "Timer and clock configuration"
  446. config SH_TIMER_TMU
  447. bool "TMU timer driver"
  448. depends on SYS_SUPPORTS_TMU
  449. default y
  450. help
  451. This enables the build of the TMU timer driver.
  452. config SH_TIMER_CMT
  453. bool "CMT timer driver"
  454. depends on SYS_SUPPORTS_CMT
  455. default y
  456. help
  457. This enables build of the CMT timer driver.
  458. config SH_TIMER_MTU2
  459. bool "MTU2 timer driver"
  460. depends on SYS_SUPPORTS_MTU2
  461. default y
  462. help
  463. This enables build of the MTU2 timer driver.
  464. config SH_PCLK_FREQ
  465. int "Peripheral clock frequency (in Hz)"
  466. depends on SH_CLK_CPG_LEGACY
  467. default "31250000" if CPU_SUBTYPE_SH7619
  468. default "33333333" if CPU_SUBTYPE_SH7770 || \
  469. CPU_SUBTYPE_SH7760 || \
  470. CPU_SUBTYPE_SH7705 || \
  471. CPU_SUBTYPE_SH7203 || \
  472. CPU_SUBTYPE_SH7206 || \
  473. CPU_SUBTYPE_SH7263 || \
  474. CPU_SUBTYPE_MXG
  475. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  476. default "66000000" if CPU_SUBTYPE_SH4_202
  477. default "50000000"
  478. help
  479. This option is used to specify the peripheral clock frequency.
  480. This is necessary for determining the reference clock value on
  481. platforms lacking an RTC.
  482. config SH_CLK_CPG
  483. def_bool y
  484. config SH_CLK_CPG_LEGACY
  485. depends on SH_CLK_CPG
  486. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  487. !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
  488. !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
  489. !CPU_SUBTYPE_SH7269
  490. endmenu
  491. menu "CPU Frequency scaling"
  492. source "drivers/cpufreq/Kconfig"
  493. config SH_CPU_FREQ
  494. tristate "SuperH CPU Frequency driver"
  495. depends on CPU_FREQ
  496. select CPU_FREQ_TABLE
  497. help
  498. This adds the cpufreq driver for SuperH. Any CPU that supports
  499. clock rate rounding through the clock framework can use this
  500. driver. While it will make the kernel slightly larger, this is
  501. harmless for CPUs that don't support rate rounding. The driver
  502. will also generate a notice in the boot log before disabling
  503. itself if the CPU in question is not capable of rate rounding.
  504. For details, take a look at <file:Documentation/cpu-freq>.
  505. If unsure, say N.
  506. endmenu
  507. source "arch/sh/drivers/Kconfig"
  508. endmenu
  509. menu "Kernel features"
  510. source kernel/Kconfig.hz
  511. config KEXEC
  512. bool "kexec system call (EXPERIMENTAL)"
  513. depends on SUPERH32 && EXPERIMENTAL && MMU
  514. help
  515. kexec is a system call that implements the ability to shutdown your
  516. current kernel, and to start another kernel. It is like a reboot
  517. but it is independent of the system firmware. And like a reboot
  518. you can start any kernel with it, not just Linux.
  519. The name comes from the similarity to the exec system call.
  520. It is an ongoing process to be certain the hardware in a machine
  521. is properly shutdown, so do not be surprised if this code does not
  522. initially work for you. It may help to enable device hotplugging
  523. support. As of this writing the exact hardware interface is
  524. strongly in flux, so no good recommendation can be made.
  525. config CRASH_DUMP
  526. bool "kernel crash dumps (EXPERIMENTAL)"
  527. depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
  528. help
  529. Generate crash dump after being started by kexec.
  530. This should be normally only set in special crash dump kernels
  531. which are loaded in the main kernel with kexec-tools into
  532. a specially reserved region and then later executed after
  533. a crash by kdump/kexec. The crash dump kernel must be compiled
  534. to a memory address not used by the main kernel using
  535. PHYSICAL_START.
  536. For more details see Documentation/kdump/kdump.txt
  537. config KEXEC_JUMP
  538. bool "kexec jump (EXPERIMENTAL)"
  539. depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
  540. help
  541. Jump between original kernel and kexeced kernel and invoke
  542. code via KEXEC
  543. config PHYSICAL_START
  544. hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
  545. default MEMORY_START
  546. ---help---
  547. This gives the physical address where the kernel is loaded
  548. and is ordinarily the same as MEMORY_START.
  549. Different values are primarily used in the case of kexec on panic
  550. where the fail safe kernel needs to run at a different address
  551. than the panic-ed kernel.
  552. config SECCOMP
  553. bool "Enable seccomp to safely compute untrusted bytecode"
  554. depends on PROC_FS
  555. help
  556. This kernel feature is useful for number crunching applications
  557. that may need to compute untrusted bytecode during their
  558. execution. By using pipes or other transports made available to
  559. the process as file descriptors supporting the read/write
  560. syscalls, it's possible to isolate those applications in
  561. their own address space using seccomp. Once seccomp is
  562. enabled via prctl, it cannot be disabled and the task is only
  563. allowed to execute a few safe syscalls defined by each seccomp
  564. mode.
  565. If unsure, say N.
  566. config CC_STACKPROTECTOR
  567. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  568. depends on SUPERH32 && EXPERIMENTAL
  569. help
  570. This option turns on the -fstack-protector GCC feature. This
  571. feature puts, at the beginning of functions, a canary value on
  572. the stack just before the return address, and validates
  573. the value just before actually returning. Stack based buffer
  574. overflows (that need to overwrite this return address) now also
  575. overwrite the canary, which gets detected and the attack is then
  576. neutralized via a kernel panic.
  577. This feature requires gcc version 4.2 or above.
  578. config SMP
  579. bool "Symmetric multi-processing support"
  580. depends on SYS_SUPPORTS_SMP
  581. select USE_GENERIC_SMP_HELPERS
  582. ---help---
  583. This enables support for systems with more than one CPU. If you have
  584. a system with only one CPU, like most personal computers, say N. If
  585. you have a system with more than one CPU, say Y.
  586. If you say N here, the kernel will run on single and multiprocessor
  587. machines, but will use only one CPU of a multiprocessor machine. If
  588. you say Y here, the kernel will run on many, but not all,
  589. singleprocessor machines. On a singleprocessor machine, the kernel
  590. will run faster if you say N here.
  591. People using multiprocessor machines who say Y here should also say
  592. Y to "Enhanced Real Time Clock Support", below.
  593. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  594. available at <http://www.tldp.org/docs.html#howto>.
  595. If you don't know what to do here, say N.
  596. config NR_CPUS
  597. int "Maximum number of CPUs (2-32)"
  598. range 2 32
  599. depends on SMP
  600. default "4" if CPU_SUBTYPE_SHX3
  601. default "2"
  602. help
  603. This allows you to specify the maximum number of CPUs which this
  604. kernel will support. The maximum supported value is 32 and the
  605. minimum value which makes sense is 2.
  606. This is purely to save memory - each supported CPU adds
  607. approximately eight kilobytes to the kernel image.
  608. config HOTPLUG_CPU
  609. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  610. depends on SMP && HOTPLUG && EXPERIMENTAL
  611. help
  612. Say Y here to experiment with turning CPUs off and on. CPUs
  613. can be controlled through /sys/devices/system/cpu.
  614. source "kernel/Kconfig.preempt"
  615. config GUSA
  616. def_bool y
  617. depends on !SMP && SUPERH32
  618. help
  619. This enables support for gUSA (general UserSpace Atomicity).
  620. This is the default implementation for both UP and non-ll/sc
  621. CPUs, and is used by the libc, amongst others.
  622. For additional information, design information can be found
  623. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  624. This should only be disabled for special cases where alternate
  625. atomicity implementations exist.
  626. config GUSA_RB
  627. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  628. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  629. help
  630. Enabling this option will allow the kernel to implement some
  631. atomic operations using a software implementation of load-locked/
  632. store-conditional (LLSC). On machines which do not have hardware
  633. LLSC, this should be more efficient than the other alternative of
  634. disabling interrupts around the atomic sequence.
  635. config HW_PERF_EVENTS
  636. bool "Enable hardware performance counter support for perf events"
  637. depends on PERF_EVENTS && CPU_HAS_PMU
  638. default y
  639. help
  640. Enable hardware performance counter support for perf events. If
  641. disabled, perf events will use software events only.
  642. source "drivers/sh/Kconfig"
  643. endmenu
  644. menu "Boot options"
  645. config ZERO_PAGE_OFFSET
  646. hex
  647. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  648. SH_7751_SOLUTION_ENGINE
  649. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  650. default "0x00002000" if PAGE_SIZE_8KB
  651. default "0x00001000"
  652. help
  653. This sets the default offset of zero page.
  654. config BOOT_LINK_OFFSET
  655. hex
  656. default "0x00210000" if SH_SHMIN
  657. default "0x00400000" if SH_CAYMAN
  658. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  659. default "0x009e0000" if SH_TITAN
  660. default "0x01800000" if SH_SDK7780
  661. default "0x02000000" if SH_EDOSK7760
  662. default "0x00800000"
  663. help
  664. This option allows you to set the link address offset of the zImage.
  665. This can be useful if you are on a board which has a small amount of
  666. memory.
  667. config ENTRY_OFFSET
  668. hex
  669. default "0x00001000" if PAGE_SIZE_4KB
  670. default "0x00002000" if PAGE_SIZE_8KB
  671. default "0x00004000" if PAGE_SIZE_16KB
  672. default "0x00010000" if PAGE_SIZE_64KB
  673. default "0x00000000"
  674. config ROMIMAGE_MMCIF
  675. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  676. depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
  677. help
  678. Say Y here to include experimental MMCIF loading code in
  679. romImage. With this enabled it is possible to write the romImage
  680. kernel image to an MMC card and boot the kernel straight from
  681. the reset vector. At reset the processor Mask ROM will load the
  682. first part of the romImage which in turn loads the rest the kernel
  683. image to RAM using the MMCIF hardware block.
  684. choice
  685. prompt "Kernel command line"
  686. optional
  687. default CMDLINE_OVERWRITE
  688. help
  689. Setting this option allows the kernel command line arguments
  690. to be set.
  691. config CMDLINE_OVERWRITE
  692. bool "Overwrite bootloader kernel arguments"
  693. help
  694. Given string will overwrite any arguments passed in by
  695. a bootloader.
  696. config CMDLINE_EXTEND
  697. bool "Extend bootloader kernel arguments"
  698. help
  699. Given string will be concatenated with arguments passed in
  700. by a bootloader.
  701. endchoice
  702. config CMDLINE
  703. string "Kernel command line arguments string"
  704. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  705. default "console=ttySC1,115200"
  706. endmenu
  707. menu "Bus options"
  708. config SUPERHYWAY
  709. tristate "SuperHyway Bus support"
  710. depends on CPU_SUBTYPE_SH4_202
  711. config MAPLE
  712. bool "Maple Bus support"
  713. depends on SH_DREAMCAST
  714. help
  715. The Maple Bus is SEGA's serial communication bus for peripherals
  716. on the Dreamcast. Without this bus support you won't be able to
  717. get your Dreamcast keyboard etc to work, so most users
  718. probably want to say 'Y' here, unless you are only using the
  719. Dreamcast with a serial line terminal or a remote network
  720. connection.
  721. config PCI
  722. bool "PCI support"
  723. depends on SYS_SUPPORTS_PCI
  724. select PCI_DOMAINS
  725. select GENERIC_PCI_IOMAP
  726. select NO_GENERIC_PCI_IOPORT_MAP
  727. help
  728. Find out whether you have a PCI motherboard. PCI is the name of a
  729. bus system, i.e. the way the CPU talks to the other stuff inside
  730. your box. If you have PCI, say Y, otherwise N.
  731. config PCI_DOMAINS
  732. bool
  733. source "drivers/pci/pcie/Kconfig"
  734. source "drivers/pci/Kconfig"
  735. source "drivers/pcmcia/Kconfig"
  736. source "drivers/pci/hotplug/Kconfig"
  737. endmenu
  738. menu "Executable file formats"
  739. source "fs/Kconfig.binfmt"
  740. endmenu
  741. menu "Power management options (EXPERIMENTAL)"
  742. depends on EXPERIMENTAL
  743. source "kernel/power/Kconfig"
  744. source "drivers/cpuidle/Kconfig"
  745. endmenu
  746. source "net/Kconfig"
  747. source "drivers/Kconfig"
  748. source "fs/Kconfig"
  749. source "arch/sh/Kconfig.debug"
  750. source "security/Kconfig"
  751. source "crypto/Kconfig"
  752. source "lib/Kconfig"