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 HAVE_DEBUG_BUGVERBOSE
  17. select ARCH_HAVE_CUSTOM_GPIO_H
  18. select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  19. select PERF_USE_VMALLOC
  20. select HAVE_DEBUG_KMEMLEAK
  21. select HAVE_KERNEL_GZIP
  22. select HAVE_KERNEL_BZIP2
  23. select HAVE_KERNEL_LZMA
  24. select HAVE_KERNEL_XZ
  25. select HAVE_KERNEL_LZO
  26. select HAVE_UID16
  27. select ARCH_WANT_IPC_PARSE_VERSION
  28. select HAVE_SYSCALL_TRACEPOINTS
  29. select HAVE_REGS_AND_STACK_ACCESS_API
  30. select HAVE_GENERIC_HARDIRQS
  31. select MAY_HAVE_SPARSE_IRQ
  32. select IRQ_FORCED_THREADING
  33. select RTC_LIB
  34. select GENERIC_ATOMIC64
  35. select GENERIC_IRQ_SHOW
  36. select GENERIC_SMP_IDLE_THREAD
  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. help
  44. The SuperH is a RISC processor targeted for use in embedded systems
  45. and consumer electronics; it was also used in the Sega Dreamcast
  46. gaming console. The SuperH port has a home page at
  47. <http://www.linux-sh.org/>.
  48. config SUPERH32
  49. def_bool ARCH = "sh"
  50. select HAVE_KPROBES
  51. select HAVE_KRETPROBES
  52. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  53. select HAVE_FUNCTION_TRACER
  54. select HAVE_FTRACE_MCOUNT_RECORD
  55. select HAVE_DYNAMIC_FTRACE
  56. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  57. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  58. select ARCH_WANT_IPC_PARSE_VERSION
  59. select HAVE_FUNCTION_GRAPH_TRACER
  60. select HAVE_ARCH_KGDB
  61. select HAVE_HW_BREAKPOINT
  62. select HAVE_MIXED_BREAKPOINTS_REGS
  63. select PERF_EVENTS
  64. select ARCH_HIBERNATION_POSSIBLE if MMU
  65. select SPARSE_IRQ
  66. config SUPERH64
  67. def_bool ARCH = "sh64"
  68. select KALLSYMS
  69. config ARCH_DEFCONFIG
  70. string
  71. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  72. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  73. config RWSEM_GENERIC_SPINLOCK
  74. def_bool y
  75. config RWSEM_XCHGADD_ALGORITHM
  76. bool
  77. config GENERIC_BUG
  78. def_bool y
  79. depends on BUG && SUPERH32
  80. config GENERIC_CSUM
  81. def_bool y
  82. depends on SUPERH64
  83. config GENERIC_HWEIGHT
  84. def_bool y
  85. config IRQ_PER_CPU
  86. def_bool y
  87. config GENERIC_GPIO
  88. def_bool n
  89. config GENERIC_CALIBRATE_DELAY
  90. bool
  91. config GENERIC_LOCKBREAK
  92. def_bool y
  93. depends on SMP && PREEMPT
  94. config ARCH_SUSPEND_POSSIBLE
  95. def_bool n
  96. config ARCH_HIBERNATION_POSSIBLE
  97. def_bool n
  98. config SYS_SUPPORTS_APM_EMULATION
  99. bool
  100. select ARCH_SUSPEND_POSSIBLE
  101. config SYS_SUPPORTS_HUGETLBFS
  102. bool
  103. config SYS_SUPPORTS_SMP
  104. bool
  105. config SYS_SUPPORTS_NUMA
  106. bool
  107. config SYS_SUPPORTS_PCI
  108. bool
  109. config SYS_SUPPORTS_CMT
  110. bool
  111. config SYS_SUPPORTS_MTU2
  112. bool
  113. config SYS_SUPPORTS_TMU
  114. bool
  115. config STACKTRACE_SUPPORT
  116. def_bool y
  117. config LOCKDEP_SUPPORT
  118. def_bool y
  119. config HAVE_LATENCYTOP_SUPPORT
  120. def_bool y
  121. config ARCH_HAS_ILOG2_U32
  122. def_bool n
  123. config ARCH_HAS_ILOG2_U64
  124. def_bool n
  125. config ARCH_NO_VIRT_TO_BUS
  126. def_bool y
  127. config ARCH_HAS_DEFAULT_IDLE
  128. def_bool y
  129. config NO_IOPORT
  130. def_bool !PCI
  131. depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
  132. !SH_HP6XX && !SH_SOLUTION_ENGINE
  133. config IO_TRAPPED
  134. bool
  135. config SWAP_IO_SPACE
  136. bool
  137. config DMA_COHERENT
  138. bool
  139. config DMA_NONCOHERENT
  140. def_bool !DMA_COHERENT
  141. config NEED_DMA_MAP_STATE
  142. def_bool DMA_NONCOHERENT
  143. config NEED_SG_DMA_LENGTH
  144. def_bool y
  145. source "init/Kconfig"
  146. source "kernel/Kconfig.freezer"
  147. menu "System type"
  148. #
  149. # Processor families
  150. #
  151. config CPU_SH2
  152. bool
  153. config CPU_SH2A
  154. bool
  155. select CPU_SH2
  156. select UNCACHED_MAPPING
  157. config CPU_SH3
  158. bool
  159. select CPU_HAS_INTEVT
  160. select CPU_HAS_SR_RB
  161. select SYS_SUPPORTS_TMU
  162. config CPU_SH4
  163. bool
  164. select CPU_HAS_INTEVT
  165. select CPU_HAS_SR_RB
  166. select CPU_HAS_FPU if !CPU_SH4AL_DSP
  167. select SYS_SUPPORTS_TMU
  168. select SYS_SUPPORTS_HUGETLBFS if MMU
  169. config CPU_SH4A
  170. bool
  171. select CPU_SH4
  172. config CPU_SH4AL_DSP
  173. bool
  174. select CPU_SH4A
  175. select CPU_HAS_DSP
  176. config CPU_SH5
  177. bool
  178. select CPU_HAS_FPU
  179. select SYS_SUPPORTS_TMU
  180. select SYS_SUPPORTS_HUGETLBFS if MMU
  181. config CPU_SHX2
  182. bool
  183. config CPU_SHX3
  184. bool
  185. select DMA_COHERENT
  186. select SYS_SUPPORTS_SMP
  187. select SYS_SUPPORTS_NUMA
  188. config ARCH_SHMOBILE
  189. bool
  190. select ARCH_SUSPEND_POSSIBLE
  191. select PM
  192. select PM_RUNTIME
  193. config CPU_HAS_PMU
  194. depends on CPU_SH4 || CPU_SH4A
  195. default y
  196. bool
  197. if SUPERH32
  198. choice
  199. prompt "Processor sub-type selection"
  200. #
  201. # Processor subtypes
  202. #
  203. # SH-2 Processor Support
  204. config CPU_SUBTYPE_SH7619
  205. bool "Support SH7619 processor"
  206. select CPU_SH2
  207. select SYS_SUPPORTS_CMT
  208. # SH-2A Processor Support
  209. config CPU_SUBTYPE_SH7201
  210. bool "Support SH7201 processor"
  211. select CPU_SH2A
  212. select CPU_HAS_FPU
  213. select SYS_SUPPORTS_MTU2
  214. config CPU_SUBTYPE_SH7203
  215. bool "Support SH7203 processor"
  216. select CPU_SH2A
  217. select CPU_HAS_FPU
  218. select SYS_SUPPORTS_CMT
  219. select SYS_SUPPORTS_MTU2
  220. select ARCH_WANT_OPTIONAL_GPIOLIB
  221. config CPU_SUBTYPE_SH7206
  222. bool "Support SH7206 processor"
  223. select CPU_SH2A
  224. select SYS_SUPPORTS_CMT
  225. select SYS_SUPPORTS_MTU2
  226. config CPU_SUBTYPE_SH7263
  227. bool "Support SH7263 processor"
  228. select CPU_SH2A
  229. select CPU_HAS_FPU
  230. select SYS_SUPPORTS_CMT
  231. select SYS_SUPPORTS_MTU2
  232. config CPU_SUBTYPE_SH7264
  233. bool "Support SH7264 processor"
  234. select CPU_SH2A
  235. select CPU_HAS_FPU
  236. select SYS_SUPPORTS_CMT
  237. select SYS_SUPPORTS_MTU2
  238. config CPU_SUBTYPE_SH7269
  239. bool "Support SH7269 processor"
  240. select CPU_SH2A
  241. select CPU_HAS_FPU
  242. select SYS_SUPPORTS_CMT
  243. select SYS_SUPPORTS_MTU2
  244. config CPU_SUBTYPE_MXG
  245. bool "Support MX-G processor"
  246. select CPU_SH2A
  247. select SYS_SUPPORTS_MTU2
  248. help
  249. Select MX-G if running on an R8A03022BG part.
  250. # SH-3 Processor Support
  251. config CPU_SUBTYPE_SH7705
  252. bool "Support SH7705 processor"
  253. select CPU_SH3
  254. config CPU_SUBTYPE_SH7706
  255. bool "Support SH7706 processor"
  256. select CPU_SH3
  257. help
  258. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  259. config CPU_SUBTYPE_SH7707
  260. bool "Support SH7707 processor"
  261. select CPU_SH3
  262. help
  263. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  264. config CPU_SUBTYPE_SH7708
  265. bool "Support SH7708 processor"
  266. select CPU_SH3
  267. help
  268. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  269. if you have a 100 Mhz SH-3 HD6417708R CPU.
  270. config CPU_SUBTYPE_SH7709
  271. bool "Support SH7709 processor"
  272. select CPU_SH3
  273. help
  274. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  275. config CPU_SUBTYPE_SH7710
  276. bool "Support SH7710 processor"
  277. select CPU_SH3
  278. select CPU_HAS_DSP
  279. help
  280. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  281. config CPU_SUBTYPE_SH7712
  282. bool "Support SH7712 processor"
  283. select CPU_SH3
  284. select CPU_HAS_DSP
  285. help
  286. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  287. config CPU_SUBTYPE_SH7720
  288. bool "Support SH7720 processor"
  289. select CPU_SH3
  290. select CPU_HAS_DSP
  291. select SYS_SUPPORTS_CMT
  292. select ARCH_WANT_OPTIONAL_GPIOLIB
  293. select USB_ARCH_HAS_OHCI
  294. select USB_OHCI_SH if USB_OHCI_HCD
  295. help
  296. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  297. config CPU_SUBTYPE_SH7721
  298. bool "Support SH7721 processor"
  299. select CPU_SH3
  300. select CPU_HAS_DSP
  301. select SYS_SUPPORTS_CMT
  302. select USB_ARCH_HAS_OHCI
  303. select USB_OHCI_SH if USB_OHCI_HCD
  304. help
  305. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  306. # SH-4 Processor Support
  307. config CPU_SUBTYPE_SH7750
  308. bool "Support SH7750 processor"
  309. select CPU_SH4
  310. help
  311. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  312. config CPU_SUBTYPE_SH7091
  313. bool "Support SH7091 processor"
  314. select CPU_SH4
  315. help
  316. Select SH7091 if you have an SH-4 based Sega device (such as
  317. the Dreamcast, Naomi, and Naomi 2).
  318. config CPU_SUBTYPE_SH7750R
  319. bool "Support SH7750R processor"
  320. select CPU_SH4
  321. config CPU_SUBTYPE_SH7750S
  322. bool "Support SH7750S processor"
  323. select CPU_SH4
  324. config CPU_SUBTYPE_SH7751
  325. bool "Support SH7751 processor"
  326. select CPU_SH4
  327. help
  328. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  329. or if you have a HD6417751R CPU.
  330. config CPU_SUBTYPE_SH7751R
  331. bool "Support SH7751R processor"
  332. select CPU_SH4
  333. config CPU_SUBTYPE_SH7760
  334. bool "Support SH7760 processor"
  335. select CPU_SH4
  336. config CPU_SUBTYPE_SH4_202
  337. bool "Support SH4-202 processor"
  338. select CPU_SH4
  339. # SH-4A Processor Support
  340. config CPU_SUBTYPE_SH7723
  341. bool "Support SH7723 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 SH7723 if you have an SH-MobileR2 CPU.
  350. config CPU_SUBTYPE_SH7724
  351. bool "Support SH7724 processor"
  352. select CPU_SH4A
  353. select CPU_SHX2
  354. select ARCH_SHMOBILE
  355. select ARCH_SPARSEMEM_ENABLE
  356. select SYS_SUPPORTS_CMT
  357. select ARCH_WANT_OPTIONAL_GPIOLIB
  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. help
  368. Select SH7734 if you have a SH4A SH7734 CPU.
  369. config CPU_SUBTYPE_SH7757
  370. bool "Support SH7757 processor"
  371. select CPU_SH4A
  372. select CPU_SHX2
  373. select ARCH_WANT_OPTIONAL_GPIOLIB
  374. select USB_ARCH_HAS_OHCI
  375. select USB_ARCH_HAS_EHCI
  376. help
  377. Select SH7757 if you have a SH4A SH7757 CPU.
  378. config CPU_SUBTYPE_SH7763
  379. bool "Support SH7763 processor"
  380. select CPU_SH4A
  381. select USB_ARCH_HAS_OHCI
  382. select USB_OHCI_SH if USB_OHCI_HCD
  383. help
  384. Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
  385. config CPU_SUBTYPE_SH7770
  386. bool "Support SH7770 processor"
  387. select CPU_SH4A
  388. config CPU_SUBTYPE_SH7780
  389. bool "Support SH7780 processor"
  390. select CPU_SH4A
  391. config CPU_SUBTYPE_SH7785
  392. bool "Support SH7785 processor"
  393. select CPU_SH4A
  394. select CPU_SHX2
  395. select ARCH_SPARSEMEM_ENABLE
  396. select SYS_SUPPORTS_NUMA
  397. select ARCH_WANT_OPTIONAL_GPIOLIB
  398. config CPU_SUBTYPE_SH7786
  399. bool "Support SH7786 processor"
  400. select CPU_SH4A
  401. select CPU_SHX3
  402. select CPU_HAS_PTEAEX
  403. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  404. select ARCH_WANT_OPTIONAL_GPIOLIB
  405. select USB_ARCH_HAS_OHCI
  406. select USB_OHCI_SH if USB_OHCI_HCD
  407. select USB_ARCH_HAS_EHCI
  408. select USB_EHCI_SH if USB_EHCI_HCD
  409. config CPU_SUBTYPE_SHX3
  410. bool "Support SH-X3 processor"
  411. select CPU_SH4A
  412. select CPU_SHX3
  413. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  414. select ARCH_REQUIRE_GPIOLIB
  415. # SH4AL-DSP Processor Support
  416. config CPU_SUBTYPE_SH7343
  417. bool "Support SH7343 processor"
  418. select CPU_SH4AL_DSP
  419. select ARCH_SHMOBILE
  420. select SYS_SUPPORTS_CMT
  421. config CPU_SUBTYPE_SH7722
  422. bool "Support SH7722 processor"
  423. select CPU_SH4AL_DSP
  424. select CPU_SHX2
  425. select ARCH_SHMOBILE
  426. select ARCH_SPARSEMEM_ENABLE
  427. select SYS_SUPPORTS_NUMA
  428. select SYS_SUPPORTS_CMT
  429. select ARCH_WANT_OPTIONAL_GPIOLIB
  430. config CPU_SUBTYPE_SH7366
  431. bool "Support SH7366 processor"
  432. select CPU_SH4AL_DSP
  433. select CPU_SHX2
  434. select ARCH_SHMOBILE
  435. select ARCH_SPARSEMEM_ENABLE
  436. select SYS_SUPPORTS_NUMA
  437. select SYS_SUPPORTS_CMT
  438. endchoice
  439. endif
  440. if SUPERH64
  441. choice
  442. prompt "Processor sub-type selection"
  443. # SH-5 Processor Support
  444. config CPU_SUBTYPE_SH5_101
  445. bool "Support SH5-101 processor"
  446. select CPU_SH5
  447. config CPU_SUBTYPE_SH5_103
  448. bool "Support SH5-103 processor"
  449. select CPU_SH5
  450. endchoice
  451. endif
  452. source "arch/sh/mm/Kconfig"
  453. source "arch/sh/Kconfig.cpu"
  454. source "arch/sh/boards/Kconfig"
  455. menu "Timer and clock configuration"
  456. config SH_TIMER_TMU
  457. bool "TMU timer driver"
  458. depends on SYS_SUPPORTS_TMU
  459. default y
  460. help
  461. This enables the build of the TMU timer driver.
  462. config SH_TIMER_CMT
  463. bool "CMT timer driver"
  464. depends on SYS_SUPPORTS_CMT
  465. default y
  466. help
  467. This enables build of the CMT timer driver.
  468. config SH_TIMER_MTU2
  469. bool "MTU2 timer driver"
  470. depends on SYS_SUPPORTS_MTU2
  471. default y
  472. help
  473. This enables build of the MTU2 timer driver.
  474. config SH_PCLK_FREQ
  475. int "Peripheral clock frequency (in Hz)"
  476. depends on SH_CLK_CPG_LEGACY
  477. default "31250000" if CPU_SUBTYPE_SH7619
  478. default "33333333" if CPU_SUBTYPE_SH7770 || \
  479. CPU_SUBTYPE_SH7760 || \
  480. CPU_SUBTYPE_SH7705 || \
  481. CPU_SUBTYPE_SH7203 || \
  482. CPU_SUBTYPE_SH7206 || \
  483. CPU_SUBTYPE_SH7263 || \
  484. CPU_SUBTYPE_MXG
  485. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  486. default "66000000" if CPU_SUBTYPE_SH4_202
  487. default "50000000"
  488. help
  489. This option is used to specify the peripheral clock frequency.
  490. This is necessary for determining the reference clock value on
  491. platforms lacking an RTC.
  492. config SH_CLK_CPG
  493. def_bool y
  494. config SH_CLK_CPG_LEGACY
  495. depends on SH_CLK_CPG
  496. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  497. !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
  498. !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
  499. !CPU_SUBTYPE_SH7269
  500. endmenu
  501. menu "CPU Frequency scaling"
  502. source "drivers/cpufreq/Kconfig"
  503. config SH_CPU_FREQ
  504. tristate "SuperH CPU Frequency driver"
  505. depends on CPU_FREQ
  506. select CPU_FREQ_TABLE
  507. help
  508. This adds the cpufreq driver for SuperH. Any CPU that supports
  509. clock rate rounding through the clock framework can use this
  510. driver. While it will make the kernel slightly larger, this is
  511. harmless for CPUs that don't support rate rounding. The driver
  512. will also generate a notice in the boot log before disabling
  513. itself if the CPU in question is not capable of rate rounding.
  514. For details, take a look at <file:Documentation/cpu-freq>.
  515. If unsure, say N.
  516. endmenu
  517. source "arch/sh/drivers/Kconfig"
  518. endmenu
  519. menu "Kernel features"
  520. source kernel/Kconfig.hz
  521. config KEXEC
  522. bool "kexec system call (EXPERIMENTAL)"
  523. depends on SUPERH32 && EXPERIMENTAL && MMU
  524. help
  525. kexec is a system call that implements the ability to shutdown your
  526. current kernel, and to start another kernel. It is like a reboot
  527. but it is independent of the system firmware. And like a reboot
  528. you can start any kernel with it, not just Linux.
  529. The name comes from the similarity to the exec system call.
  530. It is an ongoing process to be certain the hardware in a machine
  531. is properly shutdown, so do not be surprised if this code does not
  532. initially work for you. It may help to enable device hotplugging
  533. support. As of this writing the exact hardware interface is
  534. strongly in flux, so no good recommendation can be made.
  535. config CRASH_DUMP
  536. bool "kernel crash dumps (EXPERIMENTAL)"
  537. depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
  538. help
  539. Generate crash dump after being started by kexec.
  540. This should be normally only set in special crash dump kernels
  541. which are loaded in the main kernel with kexec-tools into
  542. a specially reserved region and then later executed after
  543. a crash by kdump/kexec. The crash dump kernel must be compiled
  544. to a memory address not used by the main kernel using
  545. PHYSICAL_START.
  546. For more details see Documentation/kdump/kdump.txt
  547. config KEXEC_JUMP
  548. bool "kexec jump (EXPERIMENTAL)"
  549. depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
  550. help
  551. Jump between original kernel and kexeced kernel and invoke
  552. code via KEXEC
  553. config PHYSICAL_START
  554. hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
  555. default MEMORY_START
  556. ---help---
  557. This gives the physical address where the kernel is loaded
  558. and is ordinarily the same as MEMORY_START.
  559. Different values are primarily used in the case of kexec on panic
  560. where the fail safe kernel needs to run at a different address
  561. than the panic-ed kernel.
  562. config SECCOMP
  563. bool "Enable seccomp to safely compute untrusted bytecode"
  564. depends on PROC_FS
  565. help
  566. This kernel feature is useful for number crunching applications
  567. that may need to compute untrusted bytecode during their
  568. execution. By using pipes or other transports made available to
  569. the process as file descriptors supporting the read/write
  570. syscalls, it's possible to isolate those applications in
  571. their own address space using seccomp. Once seccomp is
  572. enabled via prctl, it cannot be disabled and the task is only
  573. allowed to execute a few safe syscalls defined by each seccomp
  574. mode.
  575. If unsure, say N.
  576. config CC_STACKPROTECTOR
  577. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  578. depends on SUPERH32 && EXPERIMENTAL
  579. help
  580. This option turns on the -fstack-protector GCC feature. This
  581. feature puts, at the beginning of functions, a canary value on
  582. the stack just before the return address, and validates
  583. the value just before actually returning. Stack based buffer
  584. overflows (that need to overwrite this return address) now also
  585. overwrite the canary, which gets detected and the attack is then
  586. neutralized via a kernel panic.
  587. This feature requires gcc version 4.2 or above.
  588. config SMP
  589. bool "Symmetric multi-processing support"
  590. depends on SYS_SUPPORTS_SMP
  591. select USE_GENERIC_SMP_HELPERS
  592. ---help---
  593. This enables support for systems with more than one CPU. If you have
  594. a system with only one CPU, like most personal computers, say N. If
  595. you have a system with more than one CPU, say Y.
  596. If you say N here, the kernel will run on single and multiprocessor
  597. machines, but will use only one CPU of a multiprocessor machine. If
  598. you say Y here, the kernel will run on many, but not all,
  599. singleprocessor machines. On a singleprocessor machine, the kernel
  600. will run faster if you say N here.
  601. People using multiprocessor machines who say Y here should also say
  602. Y to "Enhanced Real Time Clock Support", below.
  603. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  604. available at <http://www.tldp.org/docs.html#howto>.
  605. If you don't know what to do here, say N.
  606. config NR_CPUS
  607. int "Maximum number of CPUs (2-32)"
  608. range 2 32
  609. depends on SMP
  610. default "4" if CPU_SUBTYPE_SHX3
  611. default "2"
  612. help
  613. This allows you to specify the maximum number of CPUs which this
  614. kernel will support. The maximum supported value is 32 and the
  615. minimum value which makes sense is 2.
  616. This is purely to save memory - each supported CPU adds
  617. approximately eight kilobytes to the kernel image.
  618. config HOTPLUG_CPU
  619. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  620. depends on SMP && HOTPLUG && EXPERIMENTAL
  621. help
  622. Say Y here to experiment with turning CPUs off and on. CPUs
  623. can be controlled through /sys/devices/system/cpu.
  624. source "kernel/Kconfig.preempt"
  625. config GUSA
  626. def_bool y
  627. depends on !SMP && SUPERH32
  628. help
  629. This enables support for gUSA (general UserSpace Atomicity).
  630. This is the default implementation for both UP and non-ll/sc
  631. CPUs, and is used by the libc, amongst others.
  632. For additional information, design information can be found
  633. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  634. This should only be disabled for special cases where alternate
  635. atomicity implementations exist.
  636. config GUSA_RB
  637. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  638. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  639. help
  640. Enabling this option will allow the kernel to implement some
  641. atomic operations using a software implementation of load-locked/
  642. store-conditional (LLSC). On machines which do not have hardware
  643. LLSC, this should be more efficient than the other alternative of
  644. disabling interrupts around the atomic sequence.
  645. config HW_PERF_EVENTS
  646. bool "Enable hardware performance counter support for perf events"
  647. depends on PERF_EVENTS && CPU_HAS_PMU
  648. default y
  649. help
  650. Enable hardware performance counter support for perf events. If
  651. disabled, perf events will use software events only.
  652. source "drivers/sh/Kconfig"
  653. endmenu
  654. menu "Boot options"
  655. config ZERO_PAGE_OFFSET
  656. hex
  657. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  658. SH_7751_SOLUTION_ENGINE
  659. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  660. default "0x00002000" if PAGE_SIZE_8KB
  661. default "0x00001000"
  662. help
  663. This sets the default offset of zero page.
  664. config BOOT_LINK_OFFSET
  665. hex
  666. default "0x00210000" if SH_SHMIN
  667. default "0x00400000" if SH_CAYMAN
  668. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  669. default "0x009e0000" if SH_TITAN
  670. default "0x01800000" if SH_SDK7780
  671. default "0x02000000" if SH_EDOSK7760
  672. default "0x00800000"
  673. help
  674. This option allows you to set the link address offset of the zImage.
  675. This can be useful if you are on a board which has a small amount of
  676. memory.
  677. config ENTRY_OFFSET
  678. hex
  679. default "0x00001000" if PAGE_SIZE_4KB
  680. default "0x00002000" if PAGE_SIZE_8KB
  681. default "0x00004000" if PAGE_SIZE_16KB
  682. default "0x00010000" if PAGE_SIZE_64KB
  683. default "0x00000000"
  684. config ROMIMAGE_MMCIF
  685. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  686. depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
  687. help
  688. Say Y here to include experimental MMCIF loading code in
  689. romImage. With this enabled it is possible to write the romImage
  690. kernel image to an MMC card and boot the kernel straight from
  691. the reset vector. At reset the processor Mask ROM will load the
  692. first part of the romImage which in turn loads the rest the kernel
  693. image to RAM using the MMCIF hardware block.
  694. choice
  695. prompt "Kernel command line"
  696. optional
  697. default CMDLINE_OVERWRITE
  698. help
  699. Setting this option allows the kernel command line arguments
  700. to be set.
  701. config CMDLINE_OVERWRITE
  702. bool "Overwrite bootloader kernel arguments"
  703. help
  704. Given string will overwrite any arguments passed in by
  705. a bootloader.
  706. config CMDLINE_EXTEND
  707. bool "Extend bootloader kernel arguments"
  708. help
  709. Given string will be concatenated with arguments passed in
  710. by a bootloader.
  711. endchoice
  712. config CMDLINE
  713. string "Kernel command line arguments string"
  714. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  715. default "console=ttySC1,115200"
  716. endmenu
  717. menu "Bus options"
  718. config SUPERHYWAY
  719. tristate "SuperHyway Bus support"
  720. depends on CPU_SUBTYPE_SH4_202
  721. config MAPLE
  722. bool "Maple Bus support"
  723. depends on SH_DREAMCAST
  724. help
  725. The Maple Bus is SEGA's serial communication bus for peripherals
  726. on the Dreamcast. Without this bus support you won't be able to
  727. get your Dreamcast keyboard etc to work, so most users
  728. probably want to say 'Y' here, unless you are only using the
  729. Dreamcast with a serial line terminal or a remote network
  730. connection.
  731. config PCI
  732. bool "PCI support"
  733. depends on SYS_SUPPORTS_PCI
  734. select PCI_DOMAINS
  735. select GENERIC_PCI_IOMAP
  736. select NO_GENERIC_PCI_IOPORT_MAP
  737. help
  738. Find out whether you have a PCI motherboard. PCI is the name of a
  739. bus system, i.e. the way the CPU talks to the other stuff inside
  740. your box. If you have PCI, say Y, otherwise N.
  741. config PCI_DOMAINS
  742. bool
  743. source "drivers/pci/pcie/Kconfig"
  744. source "drivers/pci/Kconfig"
  745. source "drivers/pcmcia/Kconfig"
  746. source "drivers/pci/hotplug/Kconfig"
  747. endmenu
  748. menu "Executable file formats"
  749. source "fs/Kconfig.binfmt"
  750. endmenu
  751. menu "Power management options (EXPERIMENTAL)"
  752. depends on EXPERIMENTAL
  753. source "kernel/power/Kconfig"
  754. source "drivers/cpuidle/Kconfig"
  755. endmenu
  756. source "net/Kconfig"
  757. source "drivers/Kconfig"
  758. source "fs/Kconfig"
  759. source "arch/sh/Kconfig.debug"
  760. source "security/Kconfig"
  761. source "crypto/Kconfig"
  762. source "lib/Kconfig"