Kconfig 58 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_KGDB
  13. select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_IRQ_WORK
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_GENERIC_HARDIRQS
  30. select HAVE_SPARSE_IRQ
  31. select GENERIC_IRQ_SHOW
  32. help
  33. The ARM series is a line of low-power-consumption RISC chip designs
  34. licensed by ARM Ltd and targeted at embedded applications and
  35. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  36. manufactured, but legacy ARM-based PC hardware remains popular in
  37. Europe. There is an ARM Linux project with a web page at
  38. <http://www.arm.linux.org.uk/>.
  39. config HAVE_PWM
  40. bool
  41. config MIGHT_HAVE_PCI
  42. bool
  43. config SYS_SUPPORTS_APM_EMULATION
  44. bool
  45. config HAVE_SCHED_CLOCK
  46. bool
  47. config GENERIC_GPIO
  48. bool
  49. config ARCH_USES_GETTIMEOFFSET
  50. bool
  51. default n
  52. config GENERIC_CLOCKEVENTS
  53. bool
  54. config GENERIC_CLOCKEVENTS_BROADCAST
  55. bool
  56. depends on GENERIC_CLOCKEVENTS
  57. default y if SMP
  58. config KTIME_SCALAR
  59. bool
  60. default y
  61. config HAVE_TCM
  62. bool
  63. select GENERIC_ALLOCATOR
  64. config HAVE_PROC_CPU
  65. bool
  66. config NO_IOPORT
  67. bool
  68. config EISA
  69. bool
  70. ---help---
  71. The Extended Industry Standard Architecture (EISA) bus was
  72. developed as an open alternative to the IBM MicroChannel bus.
  73. The EISA bus provided some of the features of the IBM MicroChannel
  74. bus while maintaining backward compatibility with cards made for
  75. the older ISA bus. The EISA bus saw limited use between 1988 and
  76. 1995 when it was made obsolete by the PCI bus.
  77. Say Y here if you are building a kernel for an EISA-based machine.
  78. Otherwise, say N.
  79. config SBUS
  80. bool
  81. config MCA
  82. bool
  83. help
  84. MicroChannel Architecture is found in some IBM PS/2 machines and
  85. laptops. It is a bus system similar to PCI or ISA. See
  86. <file:Documentation/mca.txt> (and especially the web page given
  87. there) before attempting to build an MCA bus kernel.
  88. config STACKTRACE_SUPPORT
  89. bool
  90. default y
  91. config HAVE_LATENCYTOP_SUPPORT
  92. bool
  93. depends on !SMP
  94. default y
  95. config LOCKDEP_SUPPORT
  96. bool
  97. default y
  98. config TRACE_IRQFLAGS_SUPPORT
  99. bool
  100. default y
  101. config HARDIRQS_SW_RESEND
  102. bool
  103. default y
  104. config GENERIC_IRQ_PROBE
  105. bool
  106. default y
  107. config GENERIC_LOCKBREAK
  108. bool
  109. default y
  110. depends on SMP && PREEMPT
  111. config RWSEM_GENERIC_SPINLOCK
  112. bool
  113. default y
  114. config RWSEM_XCHGADD_ALGORITHM
  115. bool
  116. config ARCH_HAS_ILOG2_U32
  117. bool
  118. config ARCH_HAS_ILOG2_U64
  119. bool
  120. config ARCH_HAS_CPUFREQ
  121. bool
  122. help
  123. Internal node to signify that the ARCH has CPUFREQ support
  124. and that the relevant menu configurations are displayed for
  125. it.
  126. config ARCH_HAS_CPU_IDLE_WAIT
  127. def_bool y
  128. config GENERIC_HWEIGHT
  129. bool
  130. default y
  131. config GENERIC_CALIBRATE_DELAY
  132. bool
  133. default y
  134. config ARCH_MAY_HAVE_PC_FDC
  135. bool
  136. config ZONE_DMA
  137. bool
  138. config NEED_DMA_MAP_STATE
  139. def_bool y
  140. config GENERIC_ISA_DMA
  141. bool
  142. config FIQ
  143. bool
  144. config ARCH_MTD_XIP
  145. bool
  146. config VECTORS_BASE
  147. hex
  148. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  149. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  150. default 0x00000000
  151. help
  152. The base address of exception vectors.
  153. config ARM_PATCH_PHYS_VIRT
  154. bool "Patch physical to virtual translations at runtime (EXPERIMENTAL)"
  155. depends on EXPERIMENTAL
  156. depends on !XIP_KERNEL && MMU
  157. depends on !ARCH_REALVIEW || !SPARSEMEM
  158. help
  159. Patch phys-to-virt and virt-to-phys translation functions at
  160. boot and module load time according to the position of the
  161. kernel in system memory.
  162. This can only be used with non-XIP MMU kernels where the base
  163. of physical memory is at a 16MB boundary, or theoretically 64K
  164. for the MSM machine class.
  165. config ARM_PATCH_PHYS_VIRT_16BIT
  166. def_bool y
  167. depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
  168. help
  169. This option extends the physical to virtual translation patching
  170. to allow physical memory down to a theoretical minimum of 64K
  171. boundaries.
  172. source "init/Kconfig"
  173. source "kernel/Kconfig.freezer"
  174. menu "System Type"
  175. config MMU
  176. bool "MMU-based Paged Memory Management Support"
  177. default y
  178. help
  179. Select if you want MMU-based virtualised addressing space
  180. support by paged memory management. If unsure, say 'Y'.
  181. #
  182. # The "ARM system type" choice list is ordered alphabetically by option
  183. # text. Please add new entries in the option alphabetic order.
  184. #
  185. choice
  186. prompt "ARM system type"
  187. default ARCH_VERSATILE
  188. config ARCH_INTEGRATOR
  189. bool "ARM Ltd. Integrator family"
  190. select ARM_AMBA
  191. select ARCH_HAS_CPUFREQ
  192. select CLKDEV_LOOKUP
  193. select ICST
  194. select GENERIC_CLOCKEVENTS
  195. select PLAT_VERSATILE
  196. select PLAT_VERSATILE_FPGA_IRQ
  197. help
  198. Support for ARM's Integrator platform.
  199. config ARCH_REALVIEW
  200. bool "ARM Ltd. RealView family"
  201. select ARM_AMBA
  202. select CLKDEV_LOOKUP
  203. select ICST
  204. select GENERIC_CLOCKEVENTS
  205. select ARCH_WANT_OPTIONAL_GPIOLIB
  206. select PLAT_VERSATILE
  207. select PLAT_VERSATILE_CLCD
  208. select ARM_TIMER_SP804
  209. select GPIO_PL061 if GPIOLIB
  210. help
  211. This enables support for ARM Ltd RealView boards.
  212. config ARCH_VERSATILE
  213. bool "ARM Ltd. Versatile family"
  214. select ARM_AMBA
  215. select ARM_VIC
  216. select CLKDEV_LOOKUP
  217. select ICST
  218. select GENERIC_CLOCKEVENTS
  219. select ARCH_WANT_OPTIONAL_GPIOLIB
  220. select PLAT_VERSATILE
  221. select PLAT_VERSATILE_CLCD
  222. select PLAT_VERSATILE_FPGA_IRQ
  223. select ARM_TIMER_SP804
  224. help
  225. This enables support for ARM Ltd Versatile board.
  226. config ARCH_VEXPRESS
  227. bool "ARM Ltd. Versatile Express family"
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select ARM_AMBA
  230. select ARM_TIMER_SP804
  231. select CLKDEV_LOOKUP
  232. select GENERIC_CLOCKEVENTS
  233. select HAVE_CLK
  234. select HAVE_PATA_PLATFORM
  235. select ICST
  236. select PLAT_VERSATILE
  237. select PLAT_VERSATILE_CLCD
  238. help
  239. This enables support for the ARM Ltd Versatile Express boards.
  240. config ARCH_AT91
  241. bool "Atmel AT91"
  242. select ARCH_REQUIRE_GPIOLIB
  243. select HAVE_CLK
  244. select CLKDEV_LOOKUP
  245. select ARM_PATCH_PHYS_VIRT if MMU
  246. help
  247. This enables support for systems based on the Atmel AT91RM9200,
  248. AT91SAM9 and AT91CAP9 processors.
  249. config ARCH_BCMRING
  250. bool "Broadcom BCMRING"
  251. depends on MMU
  252. select CPU_V6
  253. select ARM_AMBA
  254. select ARM_TIMER_SP804
  255. select CLKDEV_LOOKUP
  256. select GENERIC_CLOCKEVENTS
  257. select ARCH_WANT_OPTIONAL_GPIOLIB
  258. help
  259. Support for Broadcom's BCMRing platform.
  260. config ARCH_CLPS711X
  261. bool "Cirrus Logic CLPS711x/EP721x-based"
  262. select CPU_ARM720T
  263. select ARCH_USES_GETTIMEOFFSET
  264. help
  265. Support for Cirrus Logic 711x/721x based boards.
  266. config ARCH_CNS3XXX
  267. bool "Cavium Networks CNS3XXX family"
  268. select CPU_V6
  269. select GENERIC_CLOCKEVENTS
  270. select ARM_GIC
  271. select MIGHT_HAVE_PCI
  272. select PCI_DOMAINS if PCI
  273. help
  274. Support for Cavium Networks CNS3XXX platform.
  275. config ARCH_GEMINI
  276. bool "Cortina Systems Gemini"
  277. select CPU_FA526
  278. select ARCH_REQUIRE_GPIOLIB
  279. select ARCH_USES_GETTIMEOFFSET
  280. help
  281. Support for the Cortina Systems Gemini family SoCs
  282. config ARCH_EBSA110
  283. bool "EBSA-110"
  284. select CPU_SA110
  285. select ISA
  286. select NO_IOPORT
  287. select ARCH_USES_GETTIMEOFFSET
  288. help
  289. This is an evaluation board for the StrongARM processor available
  290. from Digital. It has limited hardware on-board, including an
  291. Ethernet interface, two PCMCIA sockets, two serial ports and a
  292. parallel port.
  293. config ARCH_EP93XX
  294. bool "EP93xx-based"
  295. select CPU_ARM920T
  296. select ARM_AMBA
  297. select ARM_VIC
  298. select CLKDEV_LOOKUP
  299. select ARCH_REQUIRE_GPIOLIB
  300. select ARCH_HAS_HOLES_MEMORYMODEL
  301. select ARCH_USES_GETTIMEOFFSET
  302. help
  303. This enables support for the Cirrus EP93xx series of CPUs.
  304. config ARCH_FOOTBRIDGE
  305. bool "FootBridge"
  306. select CPU_SA110
  307. select FOOTBRIDGE
  308. select GENERIC_CLOCKEVENTS
  309. help
  310. Support for systems based on the DC21285 companion chip
  311. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  312. config ARCH_MXC
  313. bool "Freescale MXC/iMX-based"
  314. select GENERIC_CLOCKEVENTS
  315. select ARCH_REQUIRE_GPIOLIB
  316. select CLKDEV_LOOKUP
  317. select CLKSRC_MMIO
  318. select HAVE_SCHED_CLOCK
  319. help
  320. Support for Freescale MXC/iMX-based family of processors
  321. config ARCH_MXS
  322. bool "Freescale MXS-based"
  323. select GENERIC_CLOCKEVENTS
  324. select ARCH_REQUIRE_GPIOLIB
  325. select CLKDEV_LOOKUP
  326. select CLKSRC_MMIO
  327. help
  328. Support for Freescale MXS-based family of processors
  329. config ARCH_NETX
  330. bool "Hilscher NetX based"
  331. select CLKSRC_MMIO
  332. select CPU_ARM926T
  333. select ARM_VIC
  334. select GENERIC_CLOCKEVENTS
  335. help
  336. This enables support for systems based on the Hilscher NetX Soc
  337. config ARCH_H720X
  338. bool "Hynix HMS720x-based"
  339. select CPU_ARM720T
  340. select ISA_DMA_API
  341. select ARCH_USES_GETTIMEOFFSET
  342. help
  343. This enables support for systems based on the Hynix HMS720x
  344. config ARCH_IOP13XX
  345. bool "IOP13xx-based"
  346. depends on MMU
  347. select CPU_XSC3
  348. select PLAT_IOP
  349. select PCI
  350. select ARCH_SUPPORTS_MSI
  351. select VMSPLIT_1G
  352. help
  353. Support for Intel's IOP13XX (XScale) family of processors.
  354. config ARCH_IOP32X
  355. bool "IOP32x-based"
  356. depends on MMU
  357. select CPU_XSCALE
  358. select PLAT_IOP
  359. select PCI
  360. select ARCH_REQUIRE_GPIOLIB
  361. help
  362. Support for Intel's 80219 and IOP32X (XScale) family of
  363. processors.
  364. config ARCH_IOP33X
  365. bool "IOP33x-based"
  366. depends on MMU
  367. select CPU_XSCALE
  368. select PLAT_IOP
  369. select PCI
  370. select ARCH_REQUIRE_GPIOLIB
  371. help
  372. Support for Intel's IOP33X (XScale) family of processors.
  373. config ARCH_IXP23XX
  374. bool "IXP23XX-based"
  375. depends on MMU
  376. select CPU_XSC3
  377. select PCI
  378. select ARCH_USES_GETTIMEOFFSET
  379. help
  380. Support for Intel's IXP23xx (XScale) family of processors.
  381. config ARCH_IXP2000
  382. bool "IXP2400/2800-based"
  383. depends on MMU
  384. select CPU_XSCALE
  385. select PCI
  386. select ARCH_USES_GETTIMEOFFSET
  387. help
  388. Support for Intel's IXP2400/2800 (XScale) family of processors.
  389. config ARCH_IXP4XX
  390. bool "IXP4xx-based"
  391. depends on MMU
  392. select CLKSRC_MMIO
  393. select CPU_XSCALE
  394. select GENERIC_GPIO
  395. select GENERIC_CLOCKEVENTS
  396. select HAVE_SCHED_CLOCK
  397. select MIGHT_HAVE_PCI
  398. select DMABOUNCE if PCI
  399. help
  400. Support for Intel's IXP4XX (XScale) family of processors.
  401. config ARCH_DOVE
  402. bool "Marvell Dove"
  403. select CPU_V7
  404. select PCI
  405. select ARCH_REQUIRE_GPIOLIB
  406. select GENERIC_CLOCKEVENTS
  407. select PLAT_ORION
  408. help
  409. Support for the Marvell Dove SoC 88AP510
  410. config ARCH_KIRKWOOD
  411. bool "Marvell Kirkwood"
  412. select CPU_FEROCEON
  413. select PCI
  414. select ARCH_REQUIRE_GPIOLIB
  415. select GENERIC_CLOCKEVENTS
  416. select PLAT_ORION
  417. help
  418. Support for the following Marvell Kirkwood series SoCs:
  419. 88F6180, 88F6192 and 88F6281.
  420. config ARCH_LOKI
  421. bool "Marvell Loki (88RC8480)"
  422. select CPU_FEROCEON
  423. select GENERIC_CLOCKEVENTS
  424. select PLAT_ORION
  425. help
  426. Support for the Marvell Loki (88RC8480) SoC.
  427. config ARCH_LPC32XX
  428. bool "NXP LPC32XX"
  429. select CLKSRC_MMIO
  430. select CPU_ARM926T
  431. select ARCH_REQUIRE_GPIOLIB
  432. select HAVE_IDE
  433. select ARM_AMBA
  434. select USB_ARCH_HAS_OHCI
  435. select CLKDEV_LOOKUP
  436. select GENERIC_TIME
  437. select GENERIC_CLOCKEVENTS
  438. help
  439. Support for the NXP LPC32XX family of processors
  440. config ARCH_MV78XX0
  441. bool "Marvell MV78xx0"
  442. select CPU_FEROCEON
  443. select PCI
  444. select ARCH_REQUIRE_GPIOLIB
  445. select GENERIC_CLOCKEVENTS
  446. select PLAT_ORION
  447. help
  448. Support for the following Marvell MV78xx0 series SoCs:
  449. MV781x0, MV782x0.
  450. config ARCH_ORION5X
  451. bool "Marvell Orion"
  452. depends on MMU
  453. select CPU_FEROCEON
  454. select PCI
  455. select ARCH_REQUIRE_GPIOLIB
  456. select GENERIC_CLOCKEVENTS
  457. select PLAT_ORION
  458. help
  459. Support for the following Marvell Orion 5x series SoCs:
  460. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  461. Orion-2 (5281), Orion-1-90 (6183).
  462. config ARCH_MMP
  463. bool "Marvell PXA168/910/MMP2"
  464. depends on MMU
  465. select ARCH_REQUIRE_GPIOLIB
  466. select CLKDEV_LOOKUP
  467. select GENERIC_CLOCKEVENTS
  468. select HAVE_SCHED_CLOCK
  469. select TICK_ONESHOT
  470. select PLAT_PXA
  471. select SPARSE_IRQ
  472. help
  473. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  474. config ARCH_KS8695
  475. bool "Micrel/Kendin KS8695"
  476. select CPU_ARM922T
  477. select ARCH_REQUIRE_GPIOLIB
  478. select ARCH_USES_GETTIMEOFFSET
  479. help
  480. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  481. System-on-Chip devices.
  482. config ARCH_W90X900
  483. bool "Nuvoton W90X900 CPU"
  484. select CPU_ARM926T
  485. select ARCH_REQUIRE_GPIOLIB
  486. select CLKDEV_LOOKUP
  487. select CLKSRC_MMIO
  488. select GENERIC_CLOCKEVENTS
  489. help
  490. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  491. At present, the w90x900 has been renamed nuc900, regarding
  492. the ARM series product line, you can login the following
  493. link address to know more.
  494. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  495. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  496. config ARCH_NUC93X
  497. bool "Nuvoton NUC93X CPU"
  498. select CPU_ARM926T
  499. select CLKDEV_LOOKUP
  500. help
  501. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  502. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  503. config ARCH_TEGRA
  504. bool "NVIDIA Tegra"
  505. select CLKDEV_LOOKUP
  506. select CLKSRC_MMIO
  507. select GENERIC_TIME
  508. select GENERIC_CLOCKEVENTS
  509. select GENERIC_GPIO
  510. select HAVE_CLK
  511. select HAVE_SCHED_CLOCK
  512. select ARCH_HAS_BARRIERS if CACHE_L2X0
  513. select ARCH_HAS_CPUFREQ
  514. help
  515. This enables support for NVIDIA Tegra based systems (Tegra APX,
  516. Tegra 6xx and Tegra 2 series).
  517. config ARCH_PNX4008
  518. bool "Philips Nexperia PNX4008 Mobile"
  519. select CPU_ARM926T
  520. select CLKDEV_LOOKUP
  521. select ARCH_USES_GETTIMEOFFSET
  522. help
  523. This enables support for Philips PNX4008 mobile platform.
  524. config ARCH_PXA
  525. bool "PXA2xx/PXA3xx-based"
  526. depends on MMU
  527. select ARCH_MTD_XIP
  528. select ARCH_HAS_CPUFREQ
  529. select CLKDEV_LOOKUP
  530. select CLKSRC_MMIO
  531. select ARCH_REQUIRE_GPIOLIB
  532. select GENERIC_CLOCKEVENTS
  533. select HAVE_SCHED_CLOCK
  534. select TICK_ONESHOT
  535. select PLAT_PXA
  536. select SPARSE_IRQ
  537. help
  538. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  539. config ARCH_MSM
  540. bool "Qualcomm MSM"
  541. select HAVE_CLK
  542. select GENERIC_CLOCKEVENTS
  543. select ARCH_REQUIRE_GPIOLIB
  544. select CLKDEV_LOOKUP
  545. help
  546. Support for Qualcomm MSM/QSD based systems. This runs on the
  547. apps processor of the MSM/QSD and depends on a shared memory
  548. interface to the modem processor which runs the baseband
  549. stack and controls some vital subsystems
  550. (clock and power control, etc).
  551. config ARCH_SHMOBILE
  552. bool "Renesas SH-Mobile / R-Mobile"
  553. select HAVE_CLK
  554. select CLKDEV_LOOKUP
  555. select GENERIC_CLOCKEVENTS
  556. select NO_IOPORT
  557. select SPARSE_IRQ
  558. select MULTI_IRQ_HANDLER
  559. help
  560. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  561. config ARCH_RPC
  562. bool "RiscPC"
  563. select ARCH_ACORN
  564. select FIQ
  565. select TIMER_ACORN
  566. select ARCH_MAY_HAVE_PC_FDC
  567. select HAVE_PATA_PLATFORM
  568. select ISA_DMA_API
  569. select NO_IOPORT
  570. select ARCH_SPARSEMEM_ENABLE
  571. select ARCH_USES_GETTIMEOFFSET
  572. help
  573. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  574. CD-ROM interface, serial and parallel port, and the floppy drive.
  575. config ARCH_SA1100
  576. bool "SA1100-based"
  577. select CLKSRC_MMIO
  578. select CPU_SA1100
  579. select ISA
  580. select ARCH_SPARSEMEM_ENABLE
  581. select ARCH_MTD_XIP
  582. select ARCH_HAS_CPUFREQ
  583. select CPU_FREQ
  584. select GENERIC_CLOCKEVENTS
  585. select HAVE_CLK
  586. select HAVE_SCHED_CLOCK
  587. select TICK_ONESHOT
  588. select ARCH_REQUIRE_GPIOLIB
  589. help
  590. Support for StrongARM 11x0 based boards.
  591. config ARCH_S3C2410
  592. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  593. select GENERIC_GPIO
  594. select ARCH_HAS_CPUFREQ
  595. select HAVE_CLK
  596. select CLKDEV_LOOKUP
  597. select ARCH_USES_GETTIMEOFFSET
  598. select HAVE_S3C2410_I2C if I2C
  599. help
  600. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  601. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  602. the Samsung SMDK2410 development board (and derivatives).
  603. Note, the S3C2416 and the S3C2450 are so close that they even share
  604. the same SoC ID code. This means that there is no separate machine
  605. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  606. config ARCH_S3C64XX
  607. bool "Samsung S3C64XX"
  608. select PLAT_SAMSUNG
  609. select CPU_V6
  610. select ARM_VIC
  611. select HAVE_CLK
  612. select CLKDEV_LOOKUP
  613. select NO_IOPORT
  614. select ARCH_USES_GETTIMEOFFSET
  615. select ARCH_HAS_CPUFREQ
  616. select ARCH_REQUIRE_GPIOLIB
  617. select SAMSUNG_CLKSRC
  618. select SAMSUNG_IRQ_VIC_TIMER
  619. select SAMSUNG_IRQ_UART
  620. select S3C_GPIO_TRACK
  621. select S3C_GPIO_PULL_UPDOWN
  622. select S3C_GPIO_CFG_S3C24XX
  623. select S3C_GPIO_CFG_S3C64XX
  624. select S3C_DEV_NAND
  625. select USB_ARCH_HAS_OHCI
  626. select SAMSUNG_GPIOLIB_4BIT
  627. select HAVE_S3C2410_I2C if I2C
  628. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  629. help
  630. Samsung S3C64XX series based systems
  631. config ARCH_S5P64X0
  632. bool "Samsung S5P6440 S5P6450"
  633. select CPU_V6
  634. select GENERIC_GPIO
  635. select HAVE_CLK
  636. select CLKDEV_LOOKUP
  637. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  638. select GENERIC_CLOCKEVENTS
  639. select HAVE_SCHED_CLOCK
  640. select HAVE_S3C2410_I2C if I2C
  641. select HAVE_S3C_RTC if RTC_CLASS
  642. help
  643. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  644. SMDK6450.
  645. config ARCH_S5PC100
  646. bool "Samsung S5PC100"
  647. select GENERIC_GPIO
  648. select HAVE_CLK
  649. select CLKDEV_LOOKUP
  650. select CPU_V7
  651. select ARM_L1_CACHE_SHIFT_6
  652. select ARCH_USES_GETTIMEOFFSET
  653. select HAVE_S3C2410_I2C if I2C
  654. select HAVE_S3C_RTC if RTC_CLASS
  655. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  656. help
  657. Samsung S5PC100 series based systems
  658. config ARCH_S5PV210
  659. bool "Samsung S5PV210/S5PC110"
  660. select CPU_V7
  661. select ARCH_SPARSEMEM_ENABLE
  662. select GENERIC_GPIO
  663. select HAVE_CLK
  664. select CLKDEV_LOOKUP
  665. select ARM_L1_CACHE_SHIFT_6
  666. select ARCH_HAS_CPUFREQ
  667. select GENERIC_CLOCKEVENTS
  668. select HAVE_SCHED_CLOCK
  669. select HAVE_S3C2410_I2C if I2C
  670. select HAVE_S3C_RTC if RTC_CLASS
  671. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  672. help
  673. Samsung S5PV210/S5PC110 series based systems
  674. config ARCH_EXYNOS4
  675. bool "Samsung EXYNOS4"
  676. select CPU_V7
  677. select ARCH_SPARSEMEM_ENABLE
  678. select GENERIC_GPIO
  679. select HAVE_CLK
  680. select ARCH_HAS_CPUFREQ
  681. select GENERIC_CLOCKEVENTS
  682. select HAVE_S3C_RTC if RTC_CLASS
  683. select HAVE_S3C2410_I2C if I2C
  684. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  685. help
  686. Samsung EXYNOS4 series based systems
  687. config ARCH_SHARK
  688. bool "Shark"
  689. select CPU_SA110
  690. select ISA
  691. select ISA_DMA
  692. select ZONE_DMA
  693. select PCI
  694. select ARCH_USES_GETTIMEOFFSET
  695. help
  696. Support for the StrongARM based Digital DNARD machine, also known
  697. as "Shark" (<http://www.shark-linux.de/shark.html>).
  698. config ARCH_TCC_926
  699. bool "Telechips TCC ARM926-based systems"
  700. select CLKSRC_MMIO
  701. select CPU_ARM926T
  702. select HAVE_CLK
  703. select CLKDEV_LOOKUP
  704. select GENERIC_CLOCKEVENTS
  705. help
  706. Support for Telechips TCC ARM926-based systems.
  707. config ARCH_U300
  708. bool "ST-Ericsson U300 Series"
  709. depends on MMU
  710. select CLKSRC_MMIO
  711. select CPU_ARM926T
  712. select HAVE_SCHED_CLOCK
  713. select HAVE_TCM
  714. select ARM_AMBA
  715. select ARM_VIC
  716. select GENERIC_CLOCKEVENTS
  717. select CLKDEV_LOOKUP
  718. select GENERIC_GPIO
  719. help
  720. Support for ST-Ericsson U300 series mobile platforms.
  721. config ARCH_U8500
  722. bool "ST-Ericsson U8500 Series"
  723. select CPU_V7
  724. select ARM_AMBA
  725. select GENERIC_CLOCKEVENTS
  726. select CLKDEV_LOOKUP
  727. select ARCH_REQUIRE_GPIOLIB
  728. select ARCH_HAS_CPUFREQ
  729. help
  730. Support for ST-Ericsson's Ux500 architecture
  731. config ARCH_NOMADIK
  732. bool "STMicroelectronics Nomadik"
  733. select ARM_AMBA
  734. select ARM_VIC
  735. select CPU_ARM926T
  736. select CLKDEV_LOOKUP
  737. select GENERIC_CLOCKEVENTS
  738. select ARCH_REQUIRE_GPIOLIB
  739. help
  740. Support for the Nomadik platform by ST-Ericsson
  741. config ARCH_DAVINCI
  742. bool "TI DaVinci"
  743. select GENERIC_CLOCKEVENTS
  744. select ARCH_REQUIRE_GPIOLIB
  745. select ZONE_DMA
  746. select HAVE_IDE
  747. select CLKDEV_LOOKUP
  748. select GENERIC_ALLOCATOR
  749. select GENERIC_IRQ_CHIP
  750. select ARCH_HAS_HOLES_MEMORYMODEL
  751. help
  752. Support for TI's DaVinci platform.
  753. config ARCH_OMAP
  754. bool "TI OMAP"
  755. select HAVE_CLK
  756. select ARCH_REQUIRE_GPIOLIB
  757. select ARCH_HAS_CPUFREQ
  758. select GENERIC_CLOCKEVENTS
  759. select HAVE_SCHED_CLOCK
  760. select ARCH_HAS_HOLES_MEMORYMODEL
  761. help
  762. Support for TI's OMAP platform (OMAP1/2/3/4).
  763. config PLAT_SPEAR
  764. bool "ST SPEAr"
  765. select ARM_AMBA
  766. select ARCH_REQUIRE_GPIOLIB
  767. select CLKDEV_LOOKUP
  768. select CLKSRC_MMIO
  769. select GENERIC_CLOCKEVENTS
  770. select HAVE_CLK
  771. help
  772. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  773. config ARCH_VT8500
  774. bool "VIA/WonderMedia 85xx"
  775. select CPU_ARM926T
  776. select GENERIC_GPIO
  777. select ARCH_HAS_CPUFREQ
  778. select GENERIC_CLOCKEVENTS
  779. select ARCH_REQUIRE_GPIOLIB
  780. select HAVE_PWM
  781. help
  782. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  783. endchoice
  784. #
  785. # This is sorted alphabetically by mach-* pathname. However, plat-*
  786. # Kconfigs may be included either alphabetically (according to the
  787. # plat- suffix) or along side the corresponding mach-* source.
  788. #
  789. source "arch/arm/mach-at91/Kconfig"
  790. source "arch/arm/mach-bcmring/Kconfig"
  791. source "arch/arm/mach-clps711x/Kconfig"
  792. source "arch/arm/mach-cns3xxx/Kconfig"
  793. source "arch/arm/mach-davinci/Kconfig"
  794. source "arch/arm/mach-dove/Kconfig"
  795. source "arch/arm/mach-ep93xx/Kconfig"
  796. source "arch/arm/mach-footbridge/Kconfig"
  797. source "arch/arm/mach-gemini/Kconfig"
  798. source "arch/arm/mach-h720x/Kconfig"
  799. source "arch/arm/mach-integrator/Kconfig"
  800. source "arch/arm/mach-iop32x/Kconfig"
  801. source "arch/arm/mach-iop33x/Kconfig"
  802. source "arch/arm/mach-iop13xx/Kconfig"
  803. source "arch/arm/mach-ixp4xx/Kconfig"
  804. source "arch/arm/mach-ixp2000/Kconfig"
  805. source "arch/arm/mach-ixp23xx/Kconfig"
  806. source "arch/arm/mach-kirkwood/Kconfig"
  807. source "arch/arm/mach-ks8695/Kconfig"
  808. source "arch/arm/mach-loki/Kconfig"
  809. source "arch/arm/mach-lpc32xx/Kconfig"
  810. source "arch/arm/mach-msm/Kconfig"
  811. source "arch/arm/mach-mv78xx0/Kconfig"
  812. source "arch/arm/plat-mxc/Kconfig"
  813. source "arch/arm/mach-mxs/Kconfig"
  814. source "arch/arm/mach-netx/Kconfig"
  815. source "arch/arm/mach-nomadik/Kconfig"
  816. source "arch/arm/plat-nomadik/Kconfig"
  817. source "arch/arm/mach-nuc93x/Kconfig"
  818. source "arch/arm/plat-omap/Kconfig"
  819. source "arch/arm/mach-omap1/Kconfig"
  820. source "arch/arm/mach-omap2/Kconfig"
  821. source "arch/arm/mach-orion5x/Kconfig"
  822. source "arch/arm/mach-pxa/Kconfig"
  823. source "arch/arm/plat-pxa/Kconfig"
  824. source "arch/arm/mach-mmp/Kconfig"
  825. source "arch/arm/mach-realview/Kconfig"
  826. source "arch/arm/mach-sa1100/Kconfig"
  827. source "arch/arm/plat-samsung/Kconfig"
  828. source "arch/arm/plat-s3c24xx/Kconfig"
  829. source "arch/arm/plat-s5p/Kconfig"
  830. source "arch/arm/plat-spear/Kconfig"
  831. source "arch/arm/plat-tcc/Kconfig"
  832. if ARCH_S3C2410
  833. source "arch/arm/mach-s3c2400/Kconfig"
  834. source "arch/arm/mach-s3c2410/Kconfig"
  835. source "arch/arm/mach-s3c2412/Kconfig"
  836. source "arch/arm/mach-s3c2416/Kconfig"
  837. source "arch/arm/mach-s3c2440/Kconfig"
  838. source "arch/arm/mach-s3c2443/Kconfig"
  839. endif
  840. if ARCH_S3C64XX
  841. source "arch/arm/mach-s3c64xx/Kconfig"
  842. endif
  843. source "arch/arm/mach-s5p64x0/Kconfig"
  844. source "arch/arm/mach-s5pc100/Kconfig"
  845. source "arch/arm/mach-s5pv210/Kconfig"
  846. source "arch/arm/mach-exynos4/Kconfig"
  847. source "arch/arm/mach-shmobile/Kconfig"
  848. source "arch/arm/mach-tegra/Kconfig"
  849. source "arch/arm/mach-u300/Kconfig"
  850. source "arch/arm/mach-ux500/Kconfig"
  851. source "arch/arm/mach-versatile/Kconfig"
  852. source "arch/arm/mach-vexpress/Kconfig"
  853. source "arch/arm/plat-versatile/Kconfig"
  854. source "arch/arm/mach-vt8500/Kconfig"
  855. source "arch/arm/mach-w90x900/Kconfig"
  856. # Definitions to make life easier
  857. config ARCH_ACORN
  858. bool
  859. config PLAT_IOP
  860. bool
  861. select GENERIC_CLOCKEVENTS
  862. select HAVE_SCHED_CLOCK
  863. config PLAT_ORION
  864. bool
  865. select CLKSRC_MMIO
  866. select GENERIC_IRQ_CHIP
  867. select HAVE_SCHED_CLOCK
  868. config PLAT_PXA
  869. bool
  870. config PLAT_VERSATILE
  871. bool
  872. config ARM_TIMER_SP804
  873. bool
  874. select CLKSRC_MMIO
  875. source arch/arm/mm/Kconfig
  876. config IWMMXT
  877. bool "Enable iWMMXt support"
  878. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  879. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  880. help
  881. Enable support for iWMMXt context switching at run time if
  882. running on a CPU that supports it.
  883. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  884. config XSCALE_PMU
  885. bool
  886. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  887. default y
  888. config CPU_HAS_PMU
  889. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  890. (!ARCH_OMAP3 || OMAP3_EMU)
  891. default y
  892. bool
  893. config MULTI_IRQ_HANDLER
  894. bool
  895. help
  896. Allow each machine to specify it's own IRQ handler at run time.
  897. if !MMU
  898. source "arch/arm/Kconfig-nommu"
  899. endif
  900. config ARM_ERRATA_411920
  901. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  902. depends on CPU_V6 || CPU_V6K
  903. help
  904. Invalidation of the Instruction Cache operation can
  905. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  906. It does not affect the MPCore. This option enables the ARM Ltd.
  907. recommended workaround.
  908. config ARM_ERRATA_430973
  909. bool "ARM errata: Stale prediction on replaced interworking branch"
  910. depends on CPU_V7
  911. help
  912. This option enables the workaround for the 430973 Cortex-A8
  913. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  914. interworking branch is replaced with another code sequence at the
  915. same virtual address, whether due to self-modifying code or virtual
  916. to physical address re-mapping, Cortex-A8 does not recover from the
  917. stale interworking branch prediction. This results in Cortex-A8
  918. executing the new code sequence in the incorrect ARM or Thumb state.
  919. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  920. and also flushes the branch target cache at every context switch.
  921. Note that setting specific bits in the ACTLR register may not be
  922. available in non-secure mode.
  923. config ARM_ERRATA_458693
  924. bool "ARM errata: Processor deadlock when a false hazard is created"
  925. depends on CPU_V7
  926. help
  927. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  928. erratum. For very specific sequences of memory operations, it is
  929. possible for a hazard condition intended for a cache line to instead
  930. be incorrectly associated with a different cache line. This false
  931. hazard might then cause a processor deadlock. The workaround enables
  932. the L1 caching of the NEON accesses and disables the PLD instruction
  933. in the ACTLR register. Note that setting specific bits in the ACTLR
  934. register may not be available in non-secure mode.
  935. config ARM_ERRATA_460075
  936. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  937. depends on CPU_V7
  938. help
  939. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  940. erratum. Any asynchronous access to the L2 cache may encounter a
  941. situation in which recent store transactions to the L2 cache are lost
  942. and overwritten with stale memory contents from external memory. The
  943. workaround disables the write-allocate mode for the L2 cache via the
  944. ACTLR register. Note that setting specific bits in the ACTLR register
  945. may not be available in non-secure mode.
  946. config ARM_ERRATA_742230
  947. bool "ARM errata: DMB operation may be faulty"
  948. depends on CPU_V7 && SMP
  949. help
  950. This option enables the workaround for the 742230 Cortex-A9
  951. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  952. between two write operations may not ensure the correct visibility
  953. ordering of the two writes. This workaround sets a specific bit in
  954. the diagnostic register of the Cortex-A9 which causes the DMB
  955. instruction to behave as a DSB, ensuring the correct behaviour of
  956. the two writes.
  957. config ARM_ERRATA_742231
  958. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  959. depends on CPU_V7 && SMP
  960. help
  961. This option enables the workaround for the 742231 Cortex-A9
  962. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  963. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  964. accessing some data located in the same cache line, may get corrupted
  965. data due to bad handling of the address hazard when the line gets
  966. replaced from one of the CPUs at the same time as another CPU is
  967. accessing it. This workaround sets specific bits in the diagnostic
  968. register of the Cortex-A9 which reduces the linefill issuing
  969. capabilities of the processor.
  970. config PL310_ERRATA_588369
  971. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  972. depends on CACHE_L2X0
  973. help
  974. The PL310 L2 cache controller implements three types of Clean &
  975. Invalidate maintenance operations: by Physical Address
  976. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  977. They are architecturally defined to behave as the execution of a
  978. clean operation followed immediately by an invalidate operation,
  979. both performing to the same memory location. This functionality
  980. is not correctly implemented in PL310 as clean lines are not
  981. invalidated as a result of these operations.
  982. config ARM_ERRATA_720789
  983. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  984. depends on CPU_V7 && SMP
  985. help
  986. This option enables the workaround for the 720789 Cortex-A9 (prior to
  987. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  988. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  989. As a consequence of this erratum, some TLB entries which should be
  990. invalidated are not, resulting in an incoherency in the system page
  991. tables. The workaround changes the TLB flushing routines to invalidate
  992. entries regardless of the ASID.
  993. config PL310_ERRATA_727915
  994. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  995. depends on CACHE_L2X0
  996. help
  997. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  998. operation (offset 0x7FC). This operation runs in background so that
  999. PL310 can handle normal accesses while it is in progress. Under very
  1000. rare circumstances, due to this erratum, write data can be lost when
  1001. PL310 treats a cacheable write transaction during a Clean &
  1002. Invalidate by Way operation.
  1003. config ARM_ERRATA_743622
  1004. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1005. depends on CPU_V7
  1006. help
  1007. This option enables the workaround for the 743622 Cortex-A9
  1008. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1009. optimisation in the Cortex-A9 Store Buffer may lead to data
  1010. corruption. This workaround sets a specific bit in the diagnostic
  1011. register of the Cortex-A9 which disables the Store Buffer
  1012. optimisation, preventing the defect from occurring. This has no
  1013. visible impact on the overall performance or power consumption of the
  1014. processor.
  1015. config ARM_ERRATA_751472
  1016. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1017. depends on CPU_V7 && SMP
  1018. help
  1019. This option enables the workaround for the 751472 Cortex-A9 (prior
  1020. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1021. completion of a following broadcasted operation if the second
  1022. operation is received by a CPU before the ICIALLUIS has completed,
  1023. potentially leading to corrupted entries in the cache or TLB.
  1024. config ARM_ERRATA_753970
  1025. bool "ARM errata: cache sync operation may be faulty"
  1026. depends on CACHE_PL310
  1027. help
  1028. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1029. Under some condition the effect of cache sync operation on
  1030. the store buffer still remains when the operation completes.
  1031. This means that the store buffer is always asked to drain and
  1032. this prevents it from merging any further writes. The workaround
  1033. is to replace the normal offset of cache sync operation (0x730)
  1034. by another offset targeting an unmapped PL310 register 0x740.
  1035. This has the same effect as the cache sync operation: store buffer
  1036. drain and waiting for all buffers empty.
  1037. config ARM_ERRATA_754322
  1038. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1039. depends on CPU_V7
  1040. help
  1041. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1042. r3p*) erratum. A speculative memory access may cause a page table walk
  1043. which starts prior to an ASID switch but completes afterwards. This
  1044. can populate the micro-TLB with a stale entry which may be hit with
  1045. the new ASID. This workaround places two dsb instructions in the mm
  1046. switching code so that no page table walks can cross the ASID switch.
  1047. config ARM_ERRATA_754327
  1048. bool "ARM errata: no automatic Store Buffer drain"
  1049. depends on CPU_V7 && SMP
  1050. help
  1051. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1052. r2p0) erratum. The Store Buffer does not have any automatic draining
  1053. mechanism and therefore a livelock may occur if an external agent
  1054. continuously polls a memory location waiting to observe an update.
  1055. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1056. written polling loops from denying visibility of updates to memory.
  1057. endmenu
  1058. source "arch/arm/common/Kconfig"
  1059. menu "Bus support"
  1060. config ARM_AMBA
  1061. bool
  1062. config ISA
  1063. bool
  1064. help
  1065. Find out whether you have ISA slots on your motherboard. ISA is the
  1066. name of a bus system, i.e. the way the CPU talks to the other stuff
  1067. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1068. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1069. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1070. # Select ISA DMA controller support
  1071. config ISA_DMA
  1072. bool
  1073. select ISA_DMA_API
  1074. # Select ISA DMA interface
  1075. config ISA_DMA_API
  1076. bool
  1077. config PCI
  1078. bool "PCI support" if MIGHT_HAVE_PCI
  1079. help
  1080. Find out whether you have a PCI motherboard. PCI is the name of a
  1081. bus system, i.e. the way the CPU talks to the other stuff inside
  1082. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1083. VESA. If you have PCI, say Y, otherwise N.
  1084. config PCI_DOMAINS
  1085. bool
  1086. depends on PCI
  1087. config PCI_NANOENGINE
  1088. bool "BSE nanoEngine PCI support"
  1089. depends on SA1100_NANOENGINE
  1090. help
  1091. Enable PCI on the BSE nanoEngine board.
  1092. config PCI_SYSCALL
  1093. def_bool PCI
  1094. # Select the host bridge type
  1095. config PCI_HOST_VIA82C505
  1096. bool
  1097. depends on PCI && ARCH_SHARK
  1098. default y
  1099. config PCI_HOST_ITE8152
  1100. bool
  1101. depends on PCI && MACH_ARMCORE
  1102. default y
  1103. select DMABOUNCE
  1104. source "drivers/pci/Kconfig"
  1105. source "drivers/pcmcia/Kconfig"
  1106. endmenu
  1107. menu "Kernel Features"
  1108. source "kernel/time/Kconfig"
  1109. config SMP
  1110. bool "Symmetric Multi-Processing"
  1111. depends on CPU_V6K || CPU_V7
  1112. depends on GENERIC_CLOCKEVENTS
  1113. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1114. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1115. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1116. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1117. select USE_GENERIC_SMP_HELPERS
  1118. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1119. help
  1120. This enables support for systems with more than one CPU. If you have
  1121. a system with only one CPU, like most personal computers, say N. If
  1122. you have a system with more than one CPU, say Y.
  1123. If you say N here, the kernel will run on single and multiprocessor
  1124. machines, but will use only one CPU of a multiprocessor machine. If
  1125. you say Y here, the kernel will run on many, but not all, single
  1126. processor machines. On a single processor machine, the kernel will
  1127. run faster if you say N here.
  1128. See also <file:Documentation/i386/IO-APIC.txt>,
  1129. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1130. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1131. If you don't know what to do here, say N.
  1132. config SMP_ON_UP
  1133. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1134. depends on EXPERIMENTAL
  1135. depends on SMP && !XIP_KERNEL
  1136. default y
  1137. help
  1138. SMP kernels contain instructions which fail on non-SMP processors.
  1139. Enabling this option allows the kernel to modify itself to make
  1140. these instructions safe. Disabling it allows about 1K of space
  1141. savings.
  1142. If you don't know what to do here, say Y.
  1143. config HAVE_ARM_SCU
  1144. bool
  1145. depends on SMP
  1146. help
  1147. This option enables support for the ARM system coherency unit
  1148. config HAVE_ARM_TWD
  1149. bool
  1150. depends on SMP
  1151. select TICK_ONESHOT
  1152. help
  1153. This options enables support for the ARM timer and watchdog unit
  1154. choice
  1155. prompt "Memory split"
  1156. default VMSPLIT_3G
  1157. help
  1158. Select the desired split between kernel and user memory.
  1159. If you are not absolutely sure what you are doing, leave this
  1160. option alone!
  1161. config VMSPLIT_3G
  1162. bool "3G/1G user/kernel split"
  1163. config VMSPLIT_2G
  1164. bool "2G/2G user/kernel split"
  1165. config VMSPLIT_1G
  1166. bool "1G/3G user/kernel split"
  1167. endchoice
  1168. config PAGE_OFFSET
  1169. hex
  1170. default 0x40000000 if VMSPLIT_1G
  1171. default 0x80000000 if VMSPLIT_2G
  1172. default 0xC0000000
  1173. config NR_CPUS
  1174. int "Maximum number of CPUs (2-32)"
  1175. range 2 32
  1176. depends on SMP
  1177. default "4"
  1178. config HOTPLUG_CPU
  1179. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1180. depends on SMP && HOTPLUG && EXPERIMENTAL
  1181. help
  1182. Say Y here to experiment with turning CPUs off and on. CPUs
  1183. can be controlled through /sys/devices/system/cpu.
  1184. config LOCAL_TIMERS
  1185. bool "Use local timer interrupts"
  1186. depends on SMP
  1187. default y
  1188. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1189. help
  1190. Enable support for local timers on SMP platforms, rather then the
  1191. legacy IPI broadcast method. Local timers allows the system
  1192. accounting to be spread across the timer interval, preventing a
  1193. "thundering herd" at every timer tick.
  1194. source kernel/Kconfig.preempt
  1195. config HZ
  1196. int
  1197. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1198. ARCH_S5PV210 || ARCH_EXYNOS4
  1199. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1200. default AT91_TIMER_HZ if ARCH_AT91
  1201. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1202. default 100
  1203. config THUMB2_KERNEL
  1204. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1205. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1206. select AEABI
  1207. select ARM_ASM_UNIFIED
  1208. help
  1209. By enabling this option, the kernel will be compiled in
  1210. Thumb-2 mode. A compiler/assembler that understand the unified
  1211. ARM-Thumb syntax is needed.
  1212. If unsure, say N.
  1213. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1214. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1215. depends on THUMB2_KERNEL && MODULES
  1216. default y
  1217. help
  1218. Various binutils versions can resolve Thumb-2 branches to
  1219. locally-defined, preemptible global symbols as short-range "b.n"
  1220. branch instructions.
  1221. This is a problem, because there's no guarantee the final
  1222. destination of the symbol, or any candidate locations for a
  1223. trampoline, are within range of the branch. For this reason, the
  1224. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1225. relocation in modules at all, and it makes little sense to add
  1226. support.
  1227. The symptom is that the kernel fails with an "unsupported
  1228. relocation" error when loading some modules.
  1229. Until fixed tools are available, passing
  1230. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1231. code which hits this problem, at the cost of a bit of extra runtime
  1232. stack usage in some cases.
  1233. The problem is described in more detail at:
  1234. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1235. Only Thumb-2 kernels are affected.
  1236. Unless you are sure your tools don't have this problem, say Y.
  1237. config ARM_ASM_UNIFIED
  1238. bool
  1239. config AEABI
  1240. bool "Use the ARM EABI to compile the kernel"
  1241. help
  1242. This option allows for the kernel to be compiled using the latest
  1243. ARM ABI (aka EABI). This is only useful if you are using a user
  1244. space environment that is also compiled with EABI.
  1245. Since there are major incompatibilities between the legacy ABI and
  1246. EABI, especially with regard to structure member alignment, this
  1247. option also changes the kernel syscall calling convention to
  1248. disambiguate both ABIs and allow for backward compatibility support
  1249. (selected with CONFIG_OABI_COMPAT).
  1250. To use this you need GCC version 4.0.0 or later.
  1251. config OABI_COMPAT
  1252. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1253. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1254. default y
  1255. help
  1256. This option preserves the old syscall interface along with the
  1257. new (ARM EABI) one. It also provides a compatibility layer to
  1258. intercept syscalls that have structure arguments which layout
  1259. in memory differs between the legacy ABI and the new ARM EABI
  1260. (only for non "thumb" binaries). This option adds a tiny
  1261. overhead to all syscalls and produces a slightly larger kernel.
  1262. If you know you'll be using only pure EABI user space then you
  1263. can say N here. If this option is not selected and you attempt
  1264. to execute a legacy ABI binary then the result will be
  1265. UNPREDICTABLE (in fact it can be predicted that it won't work
  1266. at all). If in doubt say Y.
  1267. config ARCH_HAS_HOLES_MEMORYMODEL
  1268. bool
  1269. config ARCH_SPARSEMEM_ENABLE
  1270. bool
  1271. config ARCH_SPARSEMEM_DEFAULT
  1272. def_bool ARCH_SPARSEMEM_ENABLE
  1273. config ARCH_SELECT_MEMORY_MODEL
  1274. def_bool ARCH_SPARSEMEM_ENABLE
  1275. config HAVE_ARCH_PFN_VALID
  1276. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1277. config HIGHMEM
  1278. bool "High Memory Support"
  1279. depends on MMU
  1280. help
  1281. The address space of ARM processors is only 4 Gigabytes large
  1282. and it has to accommodate user address space, kernel address
  1283. space as well as some memory mapped IO. That means that, if you
  1284. have a large amount of physical memory and/or IO, not all of the
  1285. memory can be "permanently mapped" by the kernel. The physical
  1286. memory that is not permanently mapped is called "high memory".
  1287. Depending on the selected kernel/user memory split, minimum
  1288. vmalloc space and actual amount of RAM, you may not need this
  1289. option which should result in a slightly faster kernel.
  1290. If unsure, say n.
  1291. config HIGHPTE
  1292. bool "Allocate 2nd-level pagetables from highmem"
  1293. depends on HIGHMEM
  1294. config HW_PERF_EVENTS
  1295. bool "Enable hardware performance counter support for perf events"
  1296. depends on PERF_EVENTS && CPU_HAS_PMU
  1297. default y
  1298. help
  1299. Enable hardware performance counter support for perf events. If
  1300. disabled, perf events will use software events only.
  1301. source "mm/Kconfig"
  1302. config FORCE_MAX_ZONEORDER
  1303. int "Maximum zone order" if ARCH_SHMOBILE
  1304. range 11 64 if ARCH_SHMOBILE
  1305. default "9" if SA1111
  1306. default "11"
  1307. help
  1308. The kernel memory allocator divides physically contiguous memory
  1309. blocks into "zones", where each zone is a power of two number of
  1310. pages. This option selects the largest power of two that the kernel
  1311. keeps in the memory allocator. If you need to allocate very large
  1312. blocks of physically contiguous memory, then you may need to
  1313. increase this value.
  1314. This config option is actually maximum order plus one. For example,
  1315. a value of 11 means that the largest free memory block is 2^10 pages.
  1316. config LEDS
  1317. bool "Timer and CPU usage LEDs"
  1318. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1319. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1320. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1321. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1322. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1323. ARCH_AT91 || ARCH_DAVINCI || \
  1324. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1325. help
  1326. If you say Y here, the LEDs on your machine will be used
  1327. to provide useful information about your current system status.
  1328. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1329. be able to select which LEDs are active using the options below. If
  1330. you are compiling a kernel for the EBSA-110 or the LART however, the
  1331. red LED will simply flash regularly to indicate that the system is
  1332. still functional. It is safe to say Y here if you have a CATS
  1333. system, but the driver will do nothing.
  1334. config LEDS_TIMER
  1335. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1336. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1337. || MACH_OMAP_PERSEUS2
  1338. depends on LEDS
  1339. depends on !GENERIC_CLOCKEVENTS
  1340. default y if ARCH_EBSA110
  1341. help
  1342. If you say Y here, one of the system LEDs (the green one on the
  1343. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1344. will flash regularly to indicate that the system is still
  1345. operational. This is mainly useful to kernel hackers who are
  1346. debugging unstable kernels.
  1347. The LART uses the same LED for both Timer LED and CPU usage LED
  1348. functions. You may choose to use both, but the Timer LED function
  1349. will overrule the CPU usage LED.
  1350. config LEDS_CPU
  1351. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1352. !ARCH_OMAP) \
  1353. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1354. || MACH_OMAP_PERSEUS2
  1355. depends on LEDS
  1356. help
  1357. If you say Y here, the red LED will be used to give a good real
  1358. time indication of CPU usage, by lighting whenever the idle task
  1359. is not currently executing.
  1360. The LART uses the same LED for both Timer LED and CPU usage LED
  1361. functions. You may choose to use both, but the Timer LED function
  1362. will overrule the CPU usage LED.
  1363. config ALIGNMENT_TRAP
  1364. bool
  1365. depends on CPU_CP15_MMU
  1366. default y if !ARCH_EBSA110
  1367. select HAVE_PROC_CPU if PROC_FS
  1368. help
  1369. ARM processors cannot fetch/store information which is not
  1370. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1371. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1372. fetch/store instructions will be emulated in software if you say
  1373. here, which has a severe performance impact. This is necessary for
  1374. correct operation of some network protocols. With an IP-only
  1375. configuration it is safe to say N, otherwise say Y.
  1376. config UACCESS_WITH_MEMCPY
  1377. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1378. depends on MMU && EXPERIMENTAL
  1379. default y if CPU_FEROCEON
  1380. help
  1381. Implement faster copy_to_user and clear_user methods for CPU
  1382. cores where a 8-word STM instruction give significantly higher
  1383. memory write throughput than a sequence of individual 32bit stores.
  1384. A possible side effect is a slight increase in scheduling latency
  1385. between threads sharing the same address space if they invoke
  1386. such copy operations with large buffers.
  1387. However, if the CPU data cache is using a write-allocate mode,
  1388. this option is unlikely to provide any performance gain.
  1389. config SECCOMP
  1390. bool
  1391. prompt "Enable seccomp to safely compute untrusted bytecode"
  1392. ---help---
  1393. This kernel feature is useful for number crunching applications
  1394. that may need to compute untrusted bytecode during their
  1395. execution. By using pipes or other transports made available to
  1396. the process as file descriptors supporting the read/write
  1397. syscalls, it's possible to isolate those applications in
  1398. their own address space using seccomp. Once seccomp is
  1399. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1400. and the task is only allowed to execute a few safe syscalls
  1401. defined by each seccomp mode.
  1402. config CC_STACKPROTECTOR
  1403. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1404. depends on EXPERIMENTAL
  1405. help
  1406. This option turns on the -fstack-protector GCC feature. This
  1407. feature puts, at the beginning of functions, a canary value on
  1408. the stack just before the return address, and validates
  1409. the value just before actually returning. Stack based buffer
  1410. overflows (that need to overwrite this return address) now also
  1411. overwrite the canary, which gets detected and the attack is then
  1412. neutralized via a kernel panic.
  1413. This feature requires gcc version 4.2 or above.
  1414. config DEPRECATED_PARAM_STRUCT
  1415. bool "Provide old way to pass kernel parameters"
  1416. help
  1417. This was deprecated in 2001 and announced to live on for 5 years.
  1418. Some old boot loaders still use this way.
  1419. endmenu
  1420. menu "Boot options"
  1421. config USE_OF
  1422. bool "Flattened Device Tree support"
  1423. select OF
  1424. select OF_EARLY_FLATTREE
  1425. help
  1426. Include support for flattened device tree machine descriptions.
  1427. # Compressed boot loader in ROM. Yes, we really want to ask about
  1428. # TEXT and BSS so we preserve their values in the config files.
  1429. config ZBOOT_ROM_TEXT
  1430. hex "Compressed ROM boot loader base address"
  1431. default "0"
  1432. help
  1433. The physical address at which the ROM-able zImage is to be
  1434. placed in the target. Platforms which normally make use of
  1435. ROM-able zImage formats normally set this to a suitable
  1436. value in their defconfig file.
  1437. If ZBOOT_ROM is not enabled, this has no effect.
  1438. config ZBOOT_ROM_BSS
  1439. hex "Compressed ROM boot loader BSS address"
  1440. default "0"
  1441. help
  1442. The base address of an area of read/write memory in the target
  1443. for the ROM-able zImage which must be available while the
  1444. decompressor is running. It must be large enough to hold the
  1445. entire decompressed kernel plus an additional 128 KiB.
  1446. Platforms which normally make use of ROM-able zImage formats
  1447. normally set this to a suitable value in their defconfig file.
  1448. If ZBOOT_ROM is not enabled, this has no effect.
  1449. config ZBOOT_ROM
  1450. bool "Compressed boot loader in ROM/flash"
  1451. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1452. help
  1453. Say Y here if you intend to execute your compressed kernel image
  1454. (zImage) directly from ROM or flash. If unsure, say N.
  1455. config ZBOOT_ROM_MMCIF
  1456. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1457. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1458. help
  1459. Say Y here to include experimental MMCIF loading code in the
  1460. ROM-able zImage. With this enabled it is possible to write the
  1461. the ROM-able zImage kernel image to an MMC card and boot the
  1462. kernel straight from the reset vector. At reset the processor
  1463. Mask ROM will load the first part of the the ROM-able zImage
  1464. which in turn loads the rest the kernel image to RAM using the
  1465. MMCIF hardware block.
  1466. config CMDLINE
  1467. string "Default kernel command string"
  1468. default ""
  1469. help
  1470. On some architectures (EBSA110 and CATS), there is currently no way
  1471. for the boot loader to pass arguments to the kernel. For these
  1472. architectures, you should supply some command-line options at build
  1473. time by entering them here. As a minimum, you should specify the
  1474. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1475. choice
  1476. prompt "Kernel command line type" if CMDLINE != ""
  1477. default CMDLINE_FROM_BOOTLOADER
  1478. config CMDLINE_FROM_BOOTLOADER
  1479. bool "Use bootloader kernel arguments if available"
  1480. help
  1481. Uses the command-line options passed by the boot loader. If
  1482. the boot loader doesn't provide any, the default kernel command
  1483. string provided in CMDLINE will be used.
  1484. config CMDLINE_EXTEND
  1485. bool "Extend bootloader kernel arguments"
  1486. help
  1487. The command-line arguments provided by the boot loader will be
  1488. appended to the default kernel command string.
  1489. config CMDLINE_FORCE
  1490. bool "Always use the default kernel command string"
  1491. help
  1492. Always use the default kernel command string, even if the boot
  1493. loader passes other arguments to the kernel.
  1494. This is useful if you cannot or don't want to change the
  1495. command-line options your boot loader passes to the kernel.
  1496. endchoice
  1497. config XIP_KERNEL
  1498. bool "Kernel Execute-In-Place from ROM"
  1499. depends on !ZBOOT_ROM
  1500. help
  1501. Execute-In-Place allows the kernel to run from non-volatile storage
  1502. directly addressable by the CPU, such as NOR flash. This saves RAM
  1503. space since the text section of the kernel is not loaded from flash
  1504. to RAM. Read-write sections, such as the data section and stack,
  1505. are still copied to RAM. The XIP kernel is not compressed since
  1506. it has to run directly from flash, so it will take more space to
  1507. store it. The flash address used to link the kernel object files,
  1508. and for storing it, is configuration dependent. Therefore, if you
  1509. say Y here, you must know the proper physical address where to
  1510. store the kernel image depending on your own flash memory usage.
  1511. Also note that the make target becomes "make xipImage" rather than
  1512. "make zImage" or "make Image". The final kernel binary to put in
  1513. ROM memory will be arch/arm/boot/xipImage.
  1514. If unsure, say N.
  1515. config XIP_PHYS_ADDR
  1516. hex "XIP Kernel Physical Location"
  1517. depends on XIP_KERNEL
  1518. default "0x00080000"
  1519. help
  1520. This is the physical address in your flash memory the kernel will
  1521. be linked for and stored to. This address is dependent on your
  1522. own flash usage.
  1523. config KEXEC
  1524. bool "Kexec system call (EXPERIMENTAL)"
  1525. depends on EXPERIMENTAL
  1526. help
  1527. kexec is a system call that implements the ability to shutdown your
  1528. current kernel, and to start another kernel. It is like a reboot
  1529. but it is independent of the system firmware. And like a reboot
  1530. you can start any kernel with it, not just Linux.
  1531. It is an ongoing process to be certain the hardware in a machine
  1532. is properly shutdown, so do not be surprised if this code does not
  1533. initially work for you. It may help to enable device hotplugging
  1534. support.
  1535. config ATAGS_PROC
  1536. bool "Export atags in procfs"
  1537. depends on KEXEC
  1538. default y
  1539. help
  1540. Should the atags used to boot the kernel be exported in an "atags"
  1541. file in procfs. Useful with kexec.
  1542. config CRASH_DUMP
  1543. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1544. depends on EXPERIMENTAL
  1545. help
  1546. Generate crash dump after being started by kexec. This should
  1547. be normally only set in special crash dump kernels which are
  1548. loaded in the main kernel with kexec-tools into a specially
  1549. reserved region and then later executed after a crash by
  1550. kdump/kexec. The crash dump kernel must be compiled to a
  1551. memory address not used by the main kernel
  1552. For more details see Documentation/kdump/kdump.txt
  1553. config AUTO_ZRELADDR
  1554. bool "Auto calculation of the decompressed kernel image address"
  1555. depends on !ZBOOT_ROM && !ARCH_U300
  1556. help
  1557. ZRELADDR is the physical address where the decompressed kernel
  1558. image will be placed. If AUTO_ZRELADDR is selected, the address
  1559. will be determined at run-time by masking the current IP with
  1560. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1561. from start of memory.
  1562. endmenu
  1563. menu "CPU Power Management"
  1564. if ARCH_HAS_CPUFREQ
  1565. source "drivers/cpufreq/Kconfig"
  1566. config CPU_FREQ_IMX
  1567. tristate "CPUfreq driver for i.MX CPUs"
  1568. depends on ARCH_MXC && CPU_FREQ
  1569. help
  1570. This enables the CPUfreq driver for i.MX CPUs.
  1571. config CPU_FREQ_SA1100
  1572. bool
  1573. config CPU_FREQ_SA1110
  1574. bool
  1575. config CPU_FREQ_INTEGRATOR
  1576. tristate "CPUfreq driver for ARM Integrator CPUs"
  1577. depends on ARCH_INTEGRATOR && CPU_FREQ
  1578. default y
  1579. help
  1580. This enables the CPUfreq driver for ARM Integrator CPUs.
  1581. For details, take a look at <file:Documentation/cpu-freq>.
  1582. If in doubt, say Y.
  1583. config CPU_FREQ_PXA
  1584. bool
  1585. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1586. default y
  1587. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1588. config CPU_FREQ_S3C64XX
  1589. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1590. depends on CPU_FREQ && CPU_S3C6410
  1591. config CPU_FREQ_S3C
  1592. bool
  1593. help
  1594. Internal configuration node for common cpufreq on Samsung SoC
  1595. config CPU_FREQ_S3C24XX
  1596. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1597. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1598. select CPU_FREQ_S3C
  1599. help
  1600. This enables the CPUfreq driver for the Samsung S3C24XX family
  1601. of CPUs.
  1602. For details, take a look at <file:Documentation/cpu-freq>.
  1603. If in doubt, say N.
  1604. config CPU_FREQ_S3C24XX_PLL
  1605. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1606. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1607. help
  1608. Compile in support for changing the PLL frequency from the
  1609. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1610. after a frequency change, so by default it is not enabled.
  1611. This also means that the PLL tables for the selected CPU(s) will
  1612. be built which may increase the size of the kernel image.
  1613. config CPU_FREQ_S3C24XX_DEBUG
  1614. bool "Debug CPUfreq Samsung driver core"
  1615. depends on CPU_FREQ_S3C24XX
  1616. help
  1617. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1618. config CPU_FREQ_S3C24XX_IODEBUG
  1619. bool "Debug CPUfreq Samsung driver IO timing"
  1620. depends on CPU_FREQ_S3C24XX
  1621. help
  1622. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1623. config CPU_FREQ_S3C24XX_DEBUGFS
  1624. bool "Export debugfs for CPUFreq"
  1625. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1626. help
  1627. Export status information via debugfs.
  1628. endif
  1629. source "drivers/cpuidle/Kconfig"
  1630. endmenu
  1631. menu "Floating point emulation"
  1632. comment "At least one emulation must be selected"
  1633. config FPE_NWFPE
  1634. bool "NWFPE math emulation"
  1635. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1636. ---help---
  1637. Say Y to include the NWFPE floating point emulator in the kernel.
  1638. This is necessary to run most binaries. Linux does not currently
  1639. support floating point hardware so you need to say Y here even if
  1640. your machine has an FPA or floating point co-processor podule.
  1641. You may say N here if you are going to load the Acorn FPEmulator
  1642. early in the bootup.
  1643. config FPE_NWFPE_XP
  1644. bool "Support extended precision"
  1645. depends on FPE_NWFPE
  1646. help
  1647. Say Y to include 80-bit support in the kernel floating-point
  1648. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1649. Note that gcc does not generate 80-bit operations by default,
  1650. so in most cases this option only enlarges the size of the
  1651. floating point emulator without any good reason.
  1652. You almost surely want to say N here.
  1653. config FPE_FASTFPE
  1654. bool "FastFPE math emulation (EXPERIMENTAL)"
  1655. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1656. ---help---
  1657. Say Y here to include the FAST floating point emulator in the kernel.
  1658. This is an experimental much faster emulator which now also has full
  1659. precision for the mantissa. It does not support any exceptions.
  1660. It is very simple, and approximately 3-6 times faster than NWFPE.
  1661. It should be sufficient for most programs. It may be not suitable
  1662. for scientific calculations, but you have to check this for yourself.
  1663. If you do not feel you need a faster FP emulation you should better
  1664. choose NWFPE.
  1665. config VFP
  1666. bool "VFP-format floating point maths"
  1667. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1668. help
  1669. Say Y to include VFP support code in the kernel. This is needed
  1670. if your hardware includes a VFP unit.
  1671. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1672. release notes and additional status information.
  1673. Say N if your target does not have VFP hardware.
  1674. config VFPv3
  1675. bool
  1676. depends on VFP
  1677. default y if CPU_V7
  1678. config NEON
  1679. bool "Advanced SIMD (NEON) Extension support"
  1680. depends on VFPv3 && CPU_V7
  1681. help
  1682. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1683. Extension.
  1684. endmenu
  1685. menu "Userspace binary formats"
  1686. source "fs/Kconfig.binfmt"
  1687. config ARTHUR
  1688. tristate "RISC OS personality"
  1689. depends on !AEABI
  1690. help
  1691. Say Y here to include the kernel code necessary if you want to run
  1692. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1693. experimental; if this sounds frightening, say N and sleep in peace.
  1694. You can also say M here to compile this support as a module (which
  1695. will be called arthur).
  1696. endmenu
  1697. menu "Power management options"
  1698. source "kernel/power/Kconfig"
  1699. config ARCH_SUSPEND_POSSIBLE
  1700. depends on !ARCH_S5P64X0 && !ARCH_S5PC100
  1701. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1702. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1703. def_bool y
  1704. endmenu
  1705. source "net/Kconfig"
  1706. source "drivers/Kconfig"
  1707. source "fs/Kconfig"
  1708. source "arch/arm/Kconfig.debug"
  1709. source "security/Kconfig"
  1710. source "crypto/Kconfig"
  1711. source "lib/Kconfig"