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_PERF_EVENTS
  15. select HAVE_DEBUG_BUGVERBOSE
  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_DEBUG_KMEMLEAK
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_BZIP2
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_KERNEL_XZ
  24. select HAVE_KERNEL_LZO
  25. select HAVE_UID16
  26. select ARCH_WANT_IPC_PARSE_VERSION
  27. select HAVE_SYSCALL_TRACEPOINTS
  28. select HAVE_REGS_AND_STACK_ACCESS_API
  29. select HAVE_GENERIC_HARDIRQS
  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. config SUPERH32
  51. def_bool ARCH = "sh"
  52. select HAVE_KPROBES
  53. select HAVE_KRETPROBES
  54. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  55. select HAVE_FUNCTION_TRACER
  56. select HAVE_FTRACE_MCOUNT_RECORD
  57. select HAVE_DYNAMIC_FTRACE
  58. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  59. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  60. select ARCH_WANT_IPC_PARSE_VERSION
  61. select HAVE_FUNCTION_GRAPH_TRACER
  62. select HAVE_ARCH_KGDB
  63. select HAVE_HW_BREAKPOINT
  64. select HAVE_MIXED_BREAKPOINTS_REGS
  65. select PERF_EVENTS
  66. select ARCH_HIBERNATION_POSSIBLE if MMU
  67. select SPARSE_IRQ
  68. config SUPERH64
  69. def_bool ARCH = "sh64"
  70. select KALLSYMS
  71. config ARCH_DEFCONFIG
  72. string
  73. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  74. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  75. config RWSEM_GENERIC_SPINLOCK
  76. def_bool y
  77. config RWSEM_XCHGADD_ALGORITHM
  78. bool
  79. config GENERIC_BUG
  80. def_bool y
  81. depends on BUG && SUPERH32
  82. config GENERIC_CSUM
  83. def_bool y
  84. depends on SUPERH64
  85. config GENERIC_HWEIGHT
  86. def_bool y
  87. config GENERIC_CALIBRATE_DELAY
  88. bool
  89. config GENERIC_LOCKBREAK
  90. def_bool y
  91. depends on SMP && PREEMPT
  92. config ARCH_SUSPEND_POSSIBLE
  93. def_bool n
  94. config ARCH_HIBERNATION_POSSIBLE
  95. def_bool n
  96. config SYS_SUPPORTS_APM_EMULATION
  97. bool
  98. select ARCH_SUSPEND_POSSIBLE
  99. config SYS_SUPPORTS_HUGETLBFS
  100. bool
  101. config SYS_SUPPORTS_SMP
  102. bool
  103. config SYS_SUPPORTS_NUMA
  104. bool
  105. config SYS_SUPPORTS_PCI
  106. bool
  107. config SYS_SUPPORTS_CMT
  108. bool
  109. config SYS_SUPPORTS_MTU2
  110. bool
  111. config SYS_SUPPORTS_TMU
  112. bool
  113. config STACKTRACE_SUPPORT
  114. def_bool y
  115. config LOCKDEP_SUPPORT
  116. def_bool y
  117. config HAVE_LATENCYTOP_SUPPORT
  118. def_bool y
  119. config ARCH_HAS_ILOG2_U32
  120. def_bool n
  121. config ARCH_HAS_ILOG2_U64
  122. def_bool n
  123. config NO_IOPORT
  124. def_bool !PCI
  125. depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
  126. !SH_HP6XX && !SH_SOLUTION_ENGINE
  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. select PINCTRL
  216. config CPU_SUBTYPE_SH7206
  217. bool "Support SH7206 processor"
  218. select CPU_SH2A
  219. select SYS_SUPPORTS_CMT
  220. select SYS_SUPPORTS_MTU2
  221. config CPU_SUBTYPE_SH7263
  222. bool "Support SH7263 processor"
  223. select CPU_SH2A
  224. select CPU_HAS_FPU
  225. select SYS_SUPPORTS_CMT
  226. select SYS_SUPPORTS_MTU2
  227. config CPU_SUBTYPE_SH7264
  228. bool "Support SH7264 processor"
  229. select CPU_SH2A
  230. select CPU_HAS_FPU
  231. select SYS_SUPPORTS_CMT
  232. select SYS_SUPPORTS_MTU2
  233. select PINCTRL
  234. config CPU_SUBTYPE_SH7269
  235. bool "Support SH7269 processor"
  236. select CPU_SH2A
  237. select CPU_HAS_FPU
  238. select SYS_SUPPORTS_CMT
  239. select SYS_SUPPORTS_MTU2
  240. select PINCTRL
  241. config CPU_SUBTYPE_MXG
  242. bool "Support MX-G processor"
  243. select CPU_SH2A
  244. select SYS_SUPPORTS_MTU2
  245. help
  246. Select MX-G if running on an R8A03022BG part.
  247. # SH-3 Processor Support
  248. config CPU_SUBTYPE_SH7705
  249. bool "Support SH7705 processor"
  250. select CPU_SH3
  251. config CPU_SUBTYPE_SH7706
  252. bool "Support SH7706 processor"
  253. select CPU_SH3
  254. help
  255. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  256. config CPU_SUBTYPE_SH7707
  257. bool "Support SH7707 processor"
  258. select CPU_SH3
  259. help
  260. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  261. config CPU_SUBTYPE_SH7708
  262. bool "Support SH7708 processor"
  263. select CPU_SH3
  264. help
  265. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  266. if you have a 100 Mhz SH-3 HD6417708R CPU.
  267. config CPU_SUBTYPE_SH7709
  268. bool "Support SH7709 processor"
  269. select CPU_SH3
  270. help
  271. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  272. config CPU_SUBTYPE_SH7710
  273. bool "Support SH7710 processor"
  274. select CPU_SH3
  275. select CPU_HAS_DSP
  276. help
  277. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  278. config CPU_SUBTYPE_SH7712
  279. bool "Support SH7712 processor"
  280. select CPU_SH3
  281. select CPU_HAS_DSP
  282. help
  283. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  284. config CPU_SUBTYPE_SH7720
  285. bool "Support SH7720 processor"
  286. select CPU_SH3
  287. select CPU_HAS_DSP
  288. select SYS_SUPPORTS_CMT
  289. select ARCH_WANT_OPTIONAL_GPIOLIB
  290. select USB_ARCH_HAS_OHCI
  291. select USB_OHCI_SH if USB_OHCI_HCD
  292. select PINCTRL
  293. help
  294. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  295. config CPU_SUBTYPE_SH7721
  296. bool "Support SH7721 processor"
  297. select CPU_SH3
  298. select CPU_HAS_DSP
  299. select SYS_SUPPORTS_CMT
  300. select USB_ARCH_HAS_OHCI
  301. select USB_OHCI_SH if USB_OHCI_HCD
  302. help
  303. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  304. # SH-4 Processor Support
  305. config CPU_SUBTYPE_SH7750
  306. bool "Support SH7750 processor"
  307. select CPU_SH4
  308. help
  309. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  310. config CPU_SUBTYPE_SH7091
  311. bool "Support SH7091 processor"
  312. select CPU_SH4
  313. help
  314. Select SH7091 if you have an SH-4 based Sega device (such as
  315. the Dreamcast, Naomi, and Naomi 2).
  316. config CPU_SUBTYPE_SH7750R
  317. bool "Support SH7750R processor"
  318. select CPU_SH4
  319. config CPU_SUBTYPE_SH7750S
  320. bool "Support SH7750S processor"
  321. select CPU_SH4
  322. config CPU_SUBTYPE_SH7751
  323. bool "Support SH7751 processor"
  324. select CPU_SH4
  325. help
  326. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  327. or if you have a HD6417751R CPU.
  328. config CPU_SUBTYPE_SH7751R
  329. bool "Support SH7751R processor"
  330. select CPU_SH4
  331. config CPU_SUBTYPE_SH7760
  332. bool "Support SH7760 processor"
  333. select CPU_SH4
  334. config CPU_SUBTYPE_SH4_202
  335. bool "Support SH4-202 processor"
  336. select CPU_SH4
  337. # SH-4A Processor Support
  338. config CPU_SUBTYPE_SH7723
  339. bool "Support SH7723 processor"
  340. select CPU_SH4A
  341. select CPU_SHX2
  342. select ARCH_SHMOBILE
  343. select ARCH_SPARSEMEM_ENABLE
  344. select SYS_SUPPORTS_CMT
  345. select ARCH_WANT_OPTIONAL_GPIOLIB
  346. select PINCTRL
  347. help
  348. Select SH7723 if you have an SH-MobileR2 CPU.
  349. config CPU_SUBTYPE_SH7724
  350. bool "Support SH7724 processor"
  351. select CPU_SH4A
  352. select CPU_SHX2
  353. select ARCH_SHMOBILE
  354. select ARCH_SPARSEMEM_ENABLE
  355. select SYS_SUPPORTS_CMT
  356. select ARCH_WANT_OPTIONAL_GPIOLIB
  357. select PINCTRL
  358. help
  359. Select SH7724 if you have an SH-MobileR2R CPU.
  360. config CPU_SUBTYPE_SH7734
  361. bool "Support SH7734 processor"
  362. select CPU_SH4A
  363. select CPU_SHX2
  364. select ARCH_WANT_OPTIONAL_GPIOLIB
  365. select USB_ARCH_HAS_OHCI
  366. select USB_ARCH_HAS_EHCI
  367. select PINCTRL
  368. help
  369. Select SH7734 if you have a SH4A SH7734 CPU.
  370. config CPU_SUBTYPE_SH7757
  371. bool "Support SH7757 processor"
  372. select CPU_SH4A
  373. select CPU_SHX2
  374. select ARCH_WANT_OPTIONAL_GPIOLIB
  375. select USB_ARCH_HAS_OHCI
  376. select USB_ARCH_HAS_EHCI
  377. select PINCTRL
  378. help
  379. Select SH7757 if you have a SH4A SH7757 CPU.
  380. config CPU_SUBTYPE_SH7763
  381. bool "Support SH7763 processor"
  382. select CPU_SH4A
  383. select USB_ARCH_HAS_OHCI
  384. select USB_OHCI_SH if USB_OHCI_HCD
  385. help
  386. Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
  387. config CPU_SUBTYPE_SH7770
  388. bool "Support SH7770 processor"
  389. select CPU_SH4A
  390. config CPU_SUBTYPE_SH7780
  391. bool "Support SH7780 processor"
  392. select CPU_SH4A
  393. config CPU_SUBTYPE_SH7785
  394. bool "Support SH7785 processor"
  395. select CPU_SH4A
  396. select CPU_SHX2
  397. select ARCH_SPARSEMEM_ENABLE
  398. select SYS_SUPPORTS_NUMA
  399. select ARCH_WANT_OPTIONAL_GPIOLIB
  400. select PINCTRL
  401. config CPU_SUBTYPE_SH7786
  402. bool "Support SH7786 processor"
  403. select CPU_SH4A
  404. select CPU_SHX3
  405. select CPU_HAS_PTEAEX
  406. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  407. select ARCH_WANT_OPTIONAL_GPIOLIB
  408. select USB_ARCH_HAS_OHCI
  409. select USB_OHCI_SH if USB_OHCI_HCD
  410. select USB_ARCH_HAS_EHCI
  411. select USB_EHCI_SH if USB_EHCI_HCD
  412. select PINCTRL
  413. config CPU_SUBTYPE_SHX3
  414. bool "Support SH-X3 processor"
  415. select CPU_SH4A
  416. select CPU_SHX3
  417. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  418. select ARCH_REQUIRE_GPIOLIB
  419. select PINCTRL
  420. # SH4AL-DSP Processor Support
  421. config CPU_SUBTYPE_SH7343
  422. bool "Support SH7343 processor"
  423. select CPU_SH4AL_DSP
  424. select ARCH_SHMOBILE
  425. select SYS_SUPPORTS_CMT
  426. config CPU_SUBTYPE_SH7722
  427. bool "Support SH7722 processor"
  428. select CPU_SH4AL_DSP
  429. select CPU_SHX2
  430. select ARCH_SHMOBILE
  431. select ARCH_SPARSEMEM_ENABLE
  432. select SYS_SUPPORTS_NUMA
  433. select SYS_SUPPORTS_CMT
  434. select ARCH_WANT_OPTIONAL_GPIOLIB
  435. select PINCTRL
  436. config CPU_SUBTYPE_SH7366
  437. bool "Support SH7366 processor"
  438. select CPU_SH4AL_DSP
  439. select CPU_SHX2
  440. select ARCH_SHMOBILE
  441. select ARCH_SPARSEMEM_ENABLE
  442. select SYS_SUPPORTS_NUMA
  443. select SYS_SUPPORTS_CMT
  444. endchoice
  445. endif
  446. if SUPERH64
  447. choice
  448. prompt "Processor sub-type selection"
  449. # SH-5 Processor Support
  450. config CPU_SUBTYPE_SH5_101
  451. bool "Support SH5-101 processor"
  452. select CPU_SH5
  453. config CPU_SUBTYPE_SH5_103
  454. bool "Support SH5-103 processor"
  455. select CPU_SH5
  456. endchoice
  457. endif
  458. source "arch/sh/mm/Kconfig"
  459. source "arch/sh/Kconfig.cpu"
  460. source "arch/sh/boards/Kconfig"
  461. menu "Timer and clock configuration"
  462. config SH_TIMER_TMU
  463. bool "TMU timer driver"
  464. depends on SYS_SUPPORTS_TMU
  465. default y
  466. help
  467. This enables the build of the TMU timer driver.
  468. config SH_TIMER_CMT
  469. bool "CMT timer driver"
  470. depends on SYS_SUPPORTS_CMT
  471. default y
  472. help
  473. This enables build of the CMT timer driver.
  474. config SH_TIMER_MTU2
  475. bool "MTU2 timer driver"
  476. depends on SYS_SUPPORTS_MTU2
  477. default y
  478. help
  479. This enables build of the MTU2 timer driver.
  480. config SH_PCLK_FREQ
  481. int "Peripheral clock frequency (in Hz)"
  482. depends on SH_CLK_CPG_LEGACY
  483. default "31250000" if CPU_SUBTYPE_SH7619
  484. default "33333333" if CPU_SUBTYPE_SH7770 || \
  485. CPU_SUBTYPE_SH7760 || \
  486. CPU_SUBTYPE_SH7705 || \
  487. CPU_SUBTYPE_SH7203 || \
  488. CPU_SUBTYPE_SH7206 || \
  489. CPU_SUBTYPE_SH7263 || \
  490. CPU_SUBTYPE_MXG
  491. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  492. default "66000000" if CPU_SUBTYPE_SH4_202
  493. default "50000000"
  494. help
  495. This option is used to specify the peripheral clock frequency.
  496. This is necessary for determining the reference clock value on
  497. platforms lacking an RTC.
  498. config SH_CLK_CPG
  499. def_bool y
  500. config SH_CLK_CPG_LEGACY
  501. depends on SH_CLK_CPG
  502. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  503. !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
  504. !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
  505. !CPU_SUBTYPE_SH7269
  506. endmenu
  507. menu "CPU Frequency scaling"
  508. source "drivers/cpufreq/Kconfig"
  509. endmenu
  510. source "arch/sh/drivers/Kconfig"
  511. endmenu
  512. menu "Kernel features"
  513. source kernel/Kconfig.hz
  514. config KEXEC
  515. bool "kexec system call (EXPERIMENTAL)"
  516. depends on SUPERH32 && MMU
  517. help
  518. kexec is a system call that implements the ability to shutdown your
  519. current kernel, and to start another kernel. It is like a reboot
  520. but it is independent of the system firmware. And like a reboot
  521. you can start any kernel with it, not just Linux.
  522. The name comes from the similarity to the exec system call.
  523. It is an ongoing process to be certain the hardware in a machine
  524. is properly shutdown, so do not be surprised if this code does not
  525. initially work for you. It may help to enable device hotplugging
  526. support. As of this writing the exact hardware interface is
  527. strongly in flux, so no good recommendation can be made.
  528. config CRASH_DUMP
  529. bool "kernel crash dumps (EXPERIMENTAL)"
  530. depends on SUPERH32 && BROKEN_ON_SMP
  531. help
  532. Generate crash dump after being started by kexec.
  533. This should be normally only set in special crash dump kernels
  534. which are loaded in the main kernel with kexec-tools into
  535. a specially reserved region and then later executed after
  536. a crash by kdump/kexec. The crash dump kernel must be compiled
  537. to a memory address not used by the main kernel using
  538. PHYSICAL_START.
  539. For more details see Documentation/kdump/kdump.txt
  540. config KEXEC_JUMP
  541. bool "kexec jump (EXPERIMENTAL)"
  542. depends on SUPERH32 && KEXEC && HIBERNATION
  543. help
  544. Jump between original kernel and kexeced kernel and invoke
  545. code via KEXEC
  546. config PHYSICAL_START
  547. hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
  548. default MEMORY_START
  549. ---help---
  550. This gives the physical address where the kernel is loaded
  551. and is ordinarily the same as MEMORY_START.
  552. Different values are primarily used in the case of kexec on panic
  553. where the fail safe kernel needs to run at a different address
  554. than the panic-ed kernel.
  555. config SECCOMP
  556. bool "Enable seccomp to safely compute untrusted bytecode"
  557. depends on PROC_FS
  558. help
  559. This kernel feature is useful for number crunching applications
  560. that may need to compute untrusted bytecode during their
  561. execution. By using pipes or other transports made available to
  562. the process as file descriptors supporting the read/write
  563. syscalls, it's possible to isolate those applications in
  564. their own address space using seccomp. Once seccomp is
  565. enabled via prctl, it cannot be disabled and the task is only
  566. allowed to execute a few safe syscalls defined by each seccomp
  567. mode.
  568. If unsure, say N.
  569. config CC_STACKPROTECTOR
  570. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  571. depends on SUPERH32
  572. help
  573. This option turns on the -fstack-protector GCC feature. This
  574. feature puts, at the beginning of functions, a canary value on
  575. the stack just before the return address, and validates
  576. the value just before actually returning. Stack based buffer
  577. overflows (that need to overwrite this return address) now also
  578. overwrite the canary, which gets detected and the attack is then
  579. neutralized via a kernel panic.
  580. This feature requires gcc version 4.2 or above.
  581. config SMP
  582. bool "Symmetric multi-processing support"
  583. depends on SYS_SUPPORTS_SMP
  584. select USE_GENERIC_SMP_HELPERS
  585. ---help---
  586. This enables support for systems with more than one CPU. If you have
  587. a system with only one CPU, like most personal computers, say N. If
  588. you have a system with more than one CPU, say Y.
  589. If you say N here, the kernel will run on single and multiprocessor
  590. machines, but will use only one CPU of a multiprocessor machine. If
  591. you say Y here, the kernel will run on many, but not all,
  592. singleprocessor machines. On a singleprocessor machine, the kernel
  593. will run faster if you say N here.
  594. People using multiprocessor machines who say Y here should also say
  595. Y to "Enhanced Real Time Clock Support", below.
  596. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  597. available at <http://www.tldp.org/docs.html#howto>.
  598. If you don't know what to do here, say N.
  599. config NR_CPUS
  600. int "Maximum number of CPUs (2-32)"
  601. range 2 32
  602. depends on SMP
  603. default "4" if CPU_SUBTYPE_SHX3
  604. default "2"
  605. help
  606. This allows you to specify the maximum number of CPUs which this
  607. kernel will support. The maximum supported value is 32 and the
  608. minimum value which makes sense is 2.
  609. This is purely to save memory - each supported CPU adds
  610. approximately eight kilobytes to the kernel image.
  611. config HOTPLUG_CPU
  612. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  613. depends on SMP && HOTPLUG
  614. help
  615. Say Y here to experiment with turning CPUs off and on. CPUs
  616. can be controlled through /sys/devices/system/cpu.
  617. source "kernel/Kconfig.preempt"
  618. config GUSA
  619. def_bool y
  620. depends on !SMP && SUPERH32
  621. help
  622. This enables support for gUSA (general UserSpace Atomicity).
  623. This is the default implementation for both UP and non-ll/sc
  624. CPUs, and is used by the libc, amongst others.
  625. For additional information, design information can be found
  626. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  627. This should only be disabled for special cases where alternate
  628. atomicity implementations exist.
  629. config GUSA_RB
  630. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  631. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  632. help
  633. Enabling this option will allow the kernel to implement some
  634. atomic operations using a software implementation of load-locked/
  635. store-conditional (LLSC). On machines which do not have hardware
  636. LLSC, this should be more efficient than the other alternative of
  637. disabling interrupts around the atomic sequence.
  638. config HW_PERF_EVENTS
  639. bool "Enable hardware performance counter support for perf events"
  640. depends on PERF_EVENTS && CPU_HAS_PMU
  641. default y
  642. help
  643. Enable hardware performance counter support for perf events. If
  644. disabled, perf events will use software events only.
  645. source "drivers/sh/Kconfig"
  646. endmenu
  647. menu "Boot options"
  648. config ZERO_PAGE_OFFSET
  649. hex
  650. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  651. SH_7751_SOLUTION_ENGINE
  652. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  653. default "0x00002000" if PAGE_SIZE_8KB
  654. default "0x00001000"
  655. help
  656. This sets the default offset of zero page.
  657. config BOOT_LINK_OFFSET
  658. hex
  659. default "0x00210000" if SH_SHMIN
  660. default "0x00400000" if SH_CAYMAN
  661. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  662. default "0x009e0000" if SH_TITAN
  663. default "0x01800000" if SH_SDK7780
  664. default "0x02000000" if SH_EDOSK7760
  665. default "0x00800000"
  666. help
  667. This option allows you to set the link address offset of the zImage.
  668. This can be useful if you are on a board which has a small amount of
  669. memory.
  670. config ENTRY_OFFSET
  671. hex
  672. default "0x00001000" if PAGE_SIZE_4KB
  673. default "0x00002000" if PAGE_SIZE_8KB
  674. default "0x00004000" if PAGE_SIZE_16KB
  675. default "0x00010000" if PAGE_SIZE_64KB
  676. default "0x00000000"
  677. config ROMIMAGE_MMCIF
  678. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  679. depends on CPU_SUBTYPE_SH7724
  680. help
  681. Say Y here to include experimental MMCIF loading code in
  682. romImage. With this enabled it is possible to write the romImage
  683. kernel image to an MMC card and boot the kernel straight from
  684. the reset vector. At reset the processor Mask ROM will load the
  685. first part of the romImage which in turn loads the rest the kernel
  686. image to RAM using the MMCIF hardware block.
  687. choice
  688. prompt "Kernel command line"
  689. optional
  690. default CMDLINE_OVERWRITE
  691. help
  692. Setting this option allows the kernel command line arguments
  693. to be set.
  694. config CMDLINE_OVERWRITE
  695. bool "Overwrite bootloader kernel arguments"
  696. help
  697. Given string will overwrite any arguments passed in by
  698. a bootloader.
  699. config CMDLINE_EXTEND
  700. bool "Extend bootloader kernel arguments"
  701. help
  702. Given string will be concatenated with arguments passed in
  703. by a bootloader.
  704. endchoice
  705. config CMDLINE
  706. string "Kernel command line arguments string"
  707. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  708. default "console=ttySC1,115200"
  709. endmenu
  710. menu "Bus options"
  711. config SUPERHYWAY
  712. tristate "SuperHyway Bus support"
  713. depends on CPU_SUBTYPE_SH4_202
  714. config MAPLE
  715. bool "Maple Bus support"
  716. depends on SH_DREAMCAST
  717. help
  718. The Maple Bus is SEGA's serial communication bus for peripherals
  719. on the Dreamcast. Without this bus support you won't be able to
  720. get your Dreamcast keyboard etc to work, so most users
  721. probably want to say 'Y' here, unless you are only using the
  722. Dreamcast with a serial line terminal or a remote network
  723. connection.
  724. config PCI
  725. bool "PCI support"
  726. depends on SYS_SUPPORTS_PCI
  727. select PCI_DOMAINS
  728. select GENERIC_PCI_IOMAP
  729. select NO_GENERIC_PCI_IOPORT_MAP
  730. help
  731. Find out whether you have a PCI motherboard. PCI is the name of a
  732. bus system, i.e. the way the CPU talks to the other stuff inside
  733. your box. If you have PCI, say Y, otherwise N.
  734. config PCI_DOMAINS
  735. bool
  736. source "drivers/pci/pcie/Kconfig"
  737. source "drivers/pci/Kconfig"
  738. source "drivers/pcmcia/Kconfig"
  739. source "drivers/pci/hotplug/Kconfig"
  740. endmenu
  741. menu "Executable file formats"
  742. source "fs/Kconfig.binfmt"
  743. endmenu
  744. menu "Power management options (EXPERIMENTAL)"
  745. source "kernel/power/Kconfig"
  746. source "drivers/cpuidle/Kconfig"
  747. endmenu
  748. source "net/Kconfig"
  749. source "drivers/Kconfig"
  750. source "fs/Kconfig"
  751. source "arch/sh/Kconfig.debug"
  752. source "security/Kconfig"
  753. source "crypto/Kconfig"
  754. source "lib/Kconfig"