Kconfig 57 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 translation functions at runtime according to
  160. the position of the kernel in system memory.
  161. This can only be used with non-XIP with MMU kernels where
  162. the base of physical memory is at a 16MB boundary.
  163. config ARM_PATCH_PHYS_VIRT_16BIT
  164. def_bool y
  165. depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
  166. source "init/Kconfig"
  167. source "kernel/Kconfig.freezer"
  168. menu "System Type"
  169. config MMU
  170. bool "MMU-based Paged Memory Management Support"
  171. default y
  172. help
  173. Select if you want MMU-based virtualised addressing space
  174. support by paged memory management. If unsure, say 'Y'.
  175. #
  176. # The "ARM system type" choice list is ordered alphabetically by option
  177. # text. Please add new entries in the option alphabetic order.
  178. #
  179. choice
  180. prompt "ARM system type"
  181. default ARCH_VERSATILE
  182. config ARCH_INTEGRATOR
  183. bool "ARM Ltd. Integrator family"
  184. select ARM_AMBA
  185. select ARCH_HAS_CPUFREQ
  186. select CLKDEV_LOOKUP
  187. select ICST
  188. select GENERIC_CLOCKEVENTS
  189. select PLAT_VERSATILE
  190. select PLAT_VERSATILE_FPGA_IRQ
  191. help
  192. Support for ARM's Integrator platform.
  193. config ARCH_REALVIEW
  194. bool "ARM Ltd. RealView family"
  195. select ARM_AMBA
  196. select CLKDEV_LOOKUP
  197. select ICST
  198. select GENERIC_CLOCKEVENTS
  199. select ARCH_WANT_OPTIONAL_GPIOLIB
  200. select PLAT_VERSATILE
  201. select PLAT_VERSATILE_CLCD
  202. select ARM_TIMER_SP804
  203. select GPIO_PL061 if GPIOLIB
  204. help
  205. This enables support for ARM Ltd RealView boards.
  206. config ARCH_VERSATILE
  207. bool "ARM Ltd. Versatile family"
  208. select ARM_AMBA
  209. select ARM_VIC
  210. select CLKDEV_LOOKUP
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select ARCH_WANT_OPTIONAL_GPIOLIB
  214. select PLAT_VERSATILE
  215. select PLAT_VERSATILE_CLCD
  216. select PLAT_VERSATILE_FPGA_IRQ
  217. select ARM_TIMER_SP804
  218. help
  219. This enables support for ARM Ltd Versatile board.
  220. config ARCH_VEXPRESS
  221. bool "ARM Ltd. Versatile Express family"
  222. select ARCH_WANT_OPTIONAL_GPIOLIB
  223. select ARM_AMBA
  224. select ARM_TIMER_SP804
  225. select CLKDEV_LOOKUP
  226. select GENERIC_CLOCKEVENTS
  227. select HAVE_CLK
  228. select HAVE_PATA_PLATFORM
  229. select ICST
  230. select PLAT_VERSATILE
  231. select PLAT_VERSATILE_CLCD
  232. help
  233. This enables support for the ARM Ltd Versatile Express boards.
  234. config ARCH_AT91
  235. bool "Atmel AT91"
  236. select ARCH_REQUIRE_GPIOLIB
  237. select HAVE_CLK
  238. help
  239. This enables support for systems based on the Atmel AT91RM9200,
  240. AT91SAM9 and AT91CAP9 processors.
  241. config ARCH_BCMRING
  242. bool "Broadcom BCMRING"
  243. depends on MMU
  244. select CPU_V6
  245. select ARM_AMBA
  246. select CLKDEV_LOOKUP
  247. select GENERIC_CLOCKEVENTS
  248. select ARCH_WANT_OPTIONAL_GPIOLIB
  249. help
  250. Support for Broadcom's BCMRing platform.
  251. config ARCH_CLPS711X
  252. bool "Cirrus Logic CLPS711x/EP721x-based"
  253. select CPU_ARM720T
  254. select ARCH_USES_GETTIMEOFFSET
  255. help
  256. Support for Cirrus Logic 711x/721x based boards.
  257. config ARCH_CNS3XXX
  258. bool "Cavium Networks CNS3XXX family"
  259. select CPU_V6
  260. select GENERIC_CLOCKEVENTS
  261. select ARM_GIC
  262. select MIGHT_HAVE_PCI
  263. select PCI_DOMAINS if PCI
  264. help
  265. Support for Cavium Networks CNS3XXX platform.
  266. config ARCH_GEMINI
  267. bool "Cortina Systems Gemini"
  268. select CPU_FA526
  269. select ARCH_REQUIRE_GPIOLIB
  270. select ARCH_USES_GETTIMEOFFSET
  271. help
  272. Support for the Cortina Systems Gemini family SoCs
  273. config ARCH_EBSA110
  274. bool "EBSA-110"
  275. select CPU_SA110
  276. select ISA
  277. select NO_IOPORT
  278. select ARCH_USES_GETTIMEOFFSET
  279. help
  280. This is an evaluation board for the StrongARM processor available
  281. from Digital. It has limited hardware on-board, including an
  282. Ethernet interface, two PCMCIA sockets, two serial ports and a
  283. parallel port.
  284. config ARCH_EP93XX
  285. bool "EP93xx-based"
  286. select CPU_ARM920T
  287. select ARM_AMBA
  288. select ARM_VIC
  289. select CLKDEV_LOOKUP
  290. select ARCH_REQUIRE_GPIOLIB
  291. select ARCH_HAS_HOLES_MEMORYMODEL
  292. select ARCH_USES_GETTIMEOFFSET
  293. help
  294. This enables support for the Cirrus EP93xx series of CPUs.
  295. config ARCH_FOOTBRIDGE
  296. bool "FootBridge"
  297. select CPU_SA110
  298. select FOOTBRIDGE
  299. select GENERIC_CLOCKEVENTS
  300. help
  301. Support for systems based on the DC21285 companion chip
  302. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  303. config ARCH_MXC
  304. bool "Freescale MXC/iMX-based"
  305. select GENERIC_CLOCKEVENTS
  306. select ARCH_REQUIRE_GPIOLIB
  307. select CLKDEV_LOOKUP
  308. select CLKSRC_MMIO
  309. select HAVE_SCHED_CLOCK
  310. help
  311. Support for Freescale MXC/iMX-based family of processors
  312. config ARCH_MXS
  313. bool "Freescale MXS-based"
  314. select GENERIC_CLOCKEVENTS
  315. select ARCH_REQUIRE_GPIOLIB
  316. select CLKDEV_LOOKUP
  317. help
  318. Support for Freescale MXS-based family of processors
  319. config ARCH_STMP3XXX
  320. bool "Freescale STMP3xxx"
  321. select CPU_ARM926T
  322. select CLKDEV_LOOKUP
  323. select ARCH_REQUIRE_GPIOLIB
  324. select GENERIC_CLOCKEVENTS
  325. select USB_ARCH_HAS_EHCI
  326. help
  327. Support for systems based on the Freescale 3xxx CPUs.
  328. config ARCH_NETX
  329. bool "Hilscher NetX based"
  330. select CLKSRC_MMIO
  331. select CPU_ARM926T
  332. select ARM_VIC
  333. select GENERIC_CLOCKEVENTS
  334. help
  335. This enables support for systems based on the Hilscher NetX Soc
  336. config ARCH_H720X
  337. bool "Hynix HMS720x-based"
  338. select CPU_ARM720T
  339. select ISA_DMA_API
  340. select ARCH_USES_GETTIMEOFFSET
  341. help
  342. This enables support for systems based on the Hynix HMS720x
  343. config ARCH_IOP13XX
  344. bool "IOP13xx-based"
  345. depends on MMU
  346. select CPU_XSC3
  347. select PLAT_IOP
  348. select PCI
  349. select ARCH_SUPPORTS_MSI
  350. select VMSPLIT_1G
  351. help
  352. Support for Intel's IOP13XX (XScale) family of processors.
  353. config ARCH_IOP32X
  354. bool "IOP32x-based"
  355. depends on MMU
  356. select CPU_XSCALE
  357. select PLAT_IOP
  358. select PCI
  359. select ARCH_REQUIRE_GPIOLIB
  360. help
  361. Support for Intel's 80219 and IOP32X (XScale) family of
  362. processors.
  363. config ARCH_IOP33X
  364. bool "IOP33x-based"
  365. depends on MMU
  366. select CPU_XSCALE
  367. select PLAT_IOP
  368. select PCI
  369. select ARCH_REQUIRE_GPIOLIB
  370. help
  371. Support for Intel's IOP33X (XScale) family of processors.
  372. config ARCH_IXP23XX
  373. bool "IXP23XX-based"
  374. depends on MMU
  375. select CPU_XSC3
  376. select PCI
  377. select ARCH_USES_GETTIMEOFFSET
  378. help
  379. Support for Intel's IXP23xx (XScale) family of processors.
  380. config ARCH_IXP2000
  381. bool "IXP2400/2800-based"
  382. depends on MMU
  383. select CPU_XSCALE
  384. select PCI
  385. select ARCH_USES_GETTIMEOFFSET
  386. help
  387. Support for Intel's IXP2400/2800 (XScale) family of processors.
  388. config ARCH_IXP4XX
  389. bool "IXP4xx-based"
  390. depends on MMU
  391. select CLKSRC_MMIO
  392. select CPU_XSCALE
  393. select GENERIC_GPIO
  394. select GENERIC_CLOCKEVENTS
  395. select HAVE_SCHED_CLOCK
  396. select MIGHT_HAVE_PCI
  397. select DMABOUNCE if PCI
  398. help
  399. Support for Intel's IXP4XX (XScale) family of processors.
  400. config ARCH_DOVE
  401. bool "Marvell Dove"
  402. select CPU_V6K
  403. select PCI
  404. select ARCH_REQUIRE_GPIOLIB
  405. select GENERIC_CLOCKEVENTS
  406. select PLAT_ORION
  407. help
  408. Support for the Marvell Dove SoC 88AP510
  409. config ARCH_KIRKWOOD
  410. bool "Marvell Kirkwood"
  411. select CPU_FEROCEON
  412. select PCI
  413. select ARCH_REQUIRE_GPIOLIB
  414. select GENERIC_CLOCKEVENTS
  415. select PLAT_ORION
  416. help
  417. Support for the following Marvell Kirkwood series SoCs:
  418. 88F6180, 88F6192 and 88F6281.
  419. config ARCH_LOKI
  420. bool "Marvell Loki (88RC8480)"
  421. select CPU_FEROCEON
  422. select GENERIC_CLOCKEVENTS
  423. select PLAT_ORION
  424. help
  425. Support for the Marvell Loki (88RC8480) SoC.
  426. config ARCH_LPC32XX
  427. bool "NXP LPC32XX"
  428. select CLKSRC_MMIO
  429. select CPU_ARM926T
  430. select ARCH_REQUIRE_GPIOLIB
  431. select HAVE_IDE
  432. select ARM_AMBA
  433. select USB_ARCH_HAS_OHCI
  434. select CLKDEV_LOOKUP
  435. select GENERIC_TIME
  436. select GENERIC_CLOCKEVENTS
  437. help
  438. Support for the NXP LPC32XX family of processors
  439. config ARCH_MV78XX0
  440. bool "Marvell MV78xx0"
  441. select CPU_FEROCEON
  442. select PCI
  443. select ARCH_REQUIRE_GPIOLIB
  444. select GENERIC_CLOCKEVENTS
  445. select PLAT_ORION
  446. help
  447. Support for the following Marvell MV78xx0 series SoCs:
  448. MV781x0, MV782x0.
  449. config ARCH_ORION5X
  450. bool "Marvell Orion"
  451. depends on MMU
  452. select CPU_FEROCEON
  453. select PCI
  454. select ARCH_REQUIRE_GPIOLIB
  455. select GENERIC_CLOCKEVENTS
  456. select PLAT_ORION
  457. help
  458. Support for the following Marvell Orion 5x series SoCs:
  459. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  460. Orion-2 (5281), Orion-1-90 (6183).
  461. config ARCH_MMP
  462. bool "Marvell PXA168/910/MMP2"
  463. depends on MMU
  464. select ARCH_REQUIRE_GPIOLIB
  465. select CLKDEV_LOOKUP
  466. select GENERIC_CLOCKEVENTS
  467. select HAVE_SCHED_CLOCK
  468. select TICK_ONESHOT
  469. select PLAT_PXA
  470. select SPARSE_IRQ
  471. help
  472. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  473. config ARCH_KS8695
  474. bool "Micrel/Kendin KS8695"
  475. select CPU_ARM922T
  476. select ARCH_REQUIRE_GPIOLIB
  477. select ARCH_USES_GETTIMEOFFSET
  478. help
  479. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  480. System-on-Chip devices.
  481. config ARCH_NS9XXX
  482. bool "NetSilicon NS9xxx"
  483. select CPU_ARM926T
  484. select GENERIC_GPIO
  485. select GENERIC_CLOCKEVENTS
  486. select HAVE_CLK
  487. help
  488. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  489. System.
  490. <http://www.digi.com/products/microprocessors/index.jsp>
  491. config ARCH_W90X900
  492. bool "Nuvoton W90X900 CPU"
  493. select CPU_ARM926T
  494. select ARCH_REQUIRE_GPIOLIB
  495. select CLKDEV_LOOKUP
  496. select CLKSRC_MMIO
  497. select GENERIC_CLOCKEVENTS
  498. help
  499. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  500. At present, the w90x900 has been renamed nuc900, regarding
  501. the ARM series product line, you can login the following
  502. link address to know more.
  503. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  504. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  505. config ARCH_NUC93X
  506. bool "Nuvoton NUC93X CPU"
  507. select CPU_ARM926T
  508. select CLKDEV_LOOKUP
  509. help
  510. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  511. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  512. config ARCH_TEGRA
  513. bool "NVIDIA Tegra"
  514. select CLKDEV_LOOKUP
  515. select CLKSRC_MMIO
  516. select GENERIC_TIME
  517. select GENERIC_CLOCKEVENTS
  518. select GENERIC_GPIO
  519. select HAVE_CLK
  520. select HAVE_SCHED_CLOCK
  521. select ARCH_HAS_BARRIERS if CACHE_L2X0
  522. select ARCH_HAS_CPUFREQ
  523. help
  524. This enables support for NVIDIA Tegra based systems (Tegra APX,
  525. Tegra 6xx and Tegra 2 series).
  526. config ARCH_PNX4008
  527. bool "Philips Nexperia PNX4008 Mobile"
  528. select CPU_ARM926T
  529. select CLKDEV_LOOKUP
  530. select ARCH_USES_GETTIMEOFFSET
  531. help
  532. This enables support for Philips PNX4008 mobile platform.
  533. config ARCH_PXA
  534. bool "PXA2xx/PXA3xx-based"
  535. depends on MMU
  536. select ARCH_MTD_XIP
  537. select ARCH_HAS_CPUFREQ
  538. select CLKDEV_LOOKUP
  539. select CLKSRC_MMIO
  540. select ARCH_REQUIRE_GPIOLIB
  541. select GENERIC_CLOCKEVENTS
  542. select HAVE_SCHED_CLOCK
  543. select TICK_ONESHOT
  544. select PLAT_PXA
  545. select SPARSE_IRQ
  546. help
  547. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  548. config ARCH_MSM
  549. bool "Qualcomm MSM"
  550. select HAVE_CLK
  551. select GENERIC_CLOCKEVENTS
  552. select ARCH_REQUIRE_GPIOLIB
  553. select CLKDEV_LOOKUP
  554. help
  555. Support for Qualcomm MSM/QSD based systems. This runs on the
  556. apps processor of the MSM/QSD and depends on a shared memory
  557. interface to the modem processor which runs the baseband
  558. stack and controls some vital subsystems
  559. (clock and power control, etc).
  560. config ARCH_SHMOBILE
  561. bool "Renesas SH-Mobile / R-Mobile"
  562. select HAVE_CLK
  563. select CLKDEV_LOOKUP
  564. select GENERIC_CLOCKEVENTS
  565. select NO_IOPORT
  566. select SPARSE_IRQ
  567. select MULTI_IRQ_HANDLER
  568. help
  569. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  570. config ARCH_RPC
  571. bool "RiscPC"
  572. select ARCH_ACORN
  573. select FIQ
  574. select TIMER_ACORN
  575. select ARCH_MAY_HAVE_PC_FDC
  576. select HAVE_PATA_PLATFORM
  577. select ISA_DMA_API
  578. select NO_IOPORT
  579. select ARCH_SPARSEMEM_ENABLE
  580. select ARCH_USES_GETTIMEOFFSET
  581. help
  582. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  583. CD-ROM interface, serial and parallel port, and the floppy drive.
  584. config ARCH_SA1100
  585. bool "SA1100-based"
  586. select CLKSRC_MMIO
  587. select CPU_SA1100
  588. select ISA
  589. select ARCH_SPARSEMEM_ENABLE
  590. select ARCH_MTD_XIP
  591. select ARCH_HAS_CPUFREQ
  592. select CPU_FREQ
  593. select GENERIC_CLOCKEVENTS
  594. select HAVE_CLK
  595. select HAVE_SCHED_CLOCK
  596. select TICK_ONESHOT
  597. select ARCH_REQUIRE_GPIOLIB
  598. help
  599. Support for StrongARM 11x0 based boards.
  600. config ARCH_S3C2410
  601. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  602. select GENERIC_GPIO
  603. select ARCH_HAS_CPUFREQ
  604. select HAVE_CLK
  605. select ARCH_USES_GETTIMEOFFSET
  606. select HAVE_S3C2410_I2C if I2C
  607. help
  608. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  609. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  610. the Samsung SMDK2410 development board (and derivatives).
  611. Note, the S3C2416 and the S3C2450 are so close that they even share
  612. the same SoC ID code. This means that there is no separate machine
  613. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  614. config ARCH_S3C64XX
  615. bool "Samsung S3C64XX"
  616. select PLAT_SAMSUNG
  617. select CPU_V6
  618. select ARM_VIC
  619. select HAVE_CLK
  620. select NO_IOPORT
  621. select ARCH_USES_GETTIMEOFFSET
  622. select ARCH_HAS_CPUFREQ
  623. select ARCH_REQUIRE_GPIOLIB
  624. select SAMSUNG_CLKSRC
  625. select SAMSUNG_IRQ_VIC_TIMER
  626. select SAMSUNG_IRQ_UART
  627. select S3C_GPIO_TRACK
  628. select S3C_GPIO_PULL_UPDOWN
  629. select S3C_GPIO_CFG_S3C24XX
  630. select S3C_GPIO_CFG_S3C64XX
  631. select S3C_DEV_NAND
  632. select USB_ARCH_HAS_OHCI
  633. select SAMSUNG_GPIOLIB_4BIT
  634. select HAVE_S3C2410_I2C if I2C
  635. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  636. help
  637. Samsung S3C64XX series based systems
  638. config ARCH_S5P64X0
  639. bool "Samsung S5P6440 S5P6450"
  640. select CPU_V6
  641. select GENERIC_GPIO
  642. select HAVE_CLK
  643. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  644. select GENERIC_CLOCKEVENTS
  645. select HAVE_SCHED_CLOCK
  646. select HAVE_S3C2410_I2C if I2C
  647. select HAVE_S3C_RTC if RTC_CLASS
  648. help
  649. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  650. SMDK6450.
  651. config ARCH_S5P6442
  652. bool "Samsung S5P6442"
  653. select CPU_V6
  654. select GENERIC_GPIO
  655. select HAVE_CLK
  656. select ARCH_USES_GETTIMEOFFSET
  657. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  658. help
  659. Samsung S5P6442 CPU based systems
  660. config ARCH_S5PC100
  661. bool "Samsung S5PC100"
  662. select GENERIC_GPIO
  663. select HAVE_CLK
  664. select CPU_V7
  665. select ARM_L1_CACHE_SHIFT_6
  666. select ARCH_USES_GETTIMEOFFSET
  667. select HAVE_S3C2410_I2C if I2C
  668. select HAVE_S3C_RTC if RTC_CLASS
  669. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  670. help
  671. Samsung S5PC100 series based systems
  672. config ARCH_S5PV210
  673. bool "Samsung S5PV210/S5PC110"
  674. select CPU_V7
  675. select ARCH_SPARSEMEM_ENABLE
  676. select GENERIC_GPIO
  677. select HAVE_CLK
  678. select ARM_L1_CACHE_SHIFT_6
  679. select ARCH_HAS_CPUFREQ
  680. select GENERIC_CLOCKEVENTS
  681. select HAVE_SCHED_CLOCK
  682. select HAVE_S3C2410_I2C if I2C
  683. select HAVE_S3C_RTC if RTC_CLASS
  684. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  685. help
  686. Samsung S5PV210/S5PC110 series based systems
  687. config ARCH_EXYNOS4
  688. bool "Samsung EXYNOS4"
  689. select CPU_V7
  690. select ARCH_SPARSEMEM_ENABLE
  691. select GENERIC_GPIO
  692. select HAVE_CLK
  693. select ARCH_HAS_CPUFREQ
  694. select GENERIC_CLOCKEVENTS
  695. select HAVE_S3C_RTC if RTC_CLASS
  696. select HAVE_S3C2410_I2C if I2C
  697. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  698. help
  699. Samsung EXYNOS4 series based systems
  700. config ARCH_SHARK
  701. bool "Shark"
  702. select CPU_SA110
  703. select ISA
  704. select ISA_DMA
  705. select ZONE_DMA
  706. select PCI
  707. select ARCH_USES_GETTIMEOFFSET
  708. help
  709. Support for the StrongARM based Digital DNARD machine, also known
  710. as "Shark" (<http://www.shark-linux.de/shark.html>).
  711. config ARCH_TCC_926
  712. bool "Telechips TCC ARM926-based systems"
  713. select CLKSRC_MMIO
  714. select CPU_ARM926T
  715. select HAVE_CLK
  716. select CLKDEV_LOOKUP
  717. select GENERIC_CLOCKEVENTS
  718. help
  719. Support for Telechips TCC ARM926-based systems.
  720. config ARCH_U300
  721. bool "ST-Ericsson U300 Series"
  722. depends on MMU
  723. select CLKSRC_MMIO
  724. select CPU_ARM926T
  725. select HAVE_SCHED_CLOCK
  726. select HAVE_TCM
  727. select ARM_AMBA
  728. select ARM_VIC
  729. select GENERIC_CLOCKEVENTS
  730. select CLKDEV_LOOKUP
  731. select GENERIC_GPIO
  732. help
  733. Support for ST-Ericsson U300 series mobile platforms.
  734. config ARCH_U8500
  735. bool "ST-Ericsson U8500 Series"
  736. select CPU_V7
  737. select ARM_AMBA
  738. select GENERIC_CLOCKEVENTS
  739. select CLKDEV_LOOKUP
  740. select ARCH_REQUIRE_GPIOLIB
  741. select ARCH_HAS_CPUFREQ
  742. help
  743. Support for ST-Ericsson's Ux500 architecture
  744. config ARCH_NOMADIK
  745. bool "STMicroelectronics Nomadik"
  746. select ARM_AMBA
  747. select ARM_VIC
  748. select CPU_ARM926T
  749. select CLKDEV_LOOKUP
  750. select GENERIC_CLOCKEVENTS
  751. select ARCH_REQUIRE_GPIOLIB
  752. help
  753. Support for the Nomadik platform by ST-Ericsson
  754. config ARCH_DAVINCI
  755. bool "TI DaVinci"
  756. select GENERIC_CLOCKEVENTS
  757. select ARCH_REQUIRE_GPIOLIB
  758. select ZONE_DMA
  759. select HAVE_IDE
  760. select CLKDEV_LOOKUP
  761. select GENERIC_ALLOCATOR
  762. select ARCH_HAS_HOLES_MEMORYMODEL
  763. help
  764. Support for TI's DaVinci platform.
  765. config ARCH_OMAP
  766. bool "TI OMAP"
  767. select HAVE_CLK
  768. select ARCH_REQUIRE_GPIOLIB
  769. select ARCH_HAS_CPUFREQ
  770. select GENERIC_CLOCKEVENTS
  771. select HAVE_SCHED_CLOCK
  772. select ARCH_HAS_HOLES_MEMORYMODEL
  773. help
  774. Support for TI's OMAP platform (OMAP1/2/3/4).
  775. config PLAT_SPEAR
  776. bool "ST SPEAr"
  777. select ARM_AMBA
  778. select ARCH_REQUIRE_GPIOLIB
  779. select CLKDEV_LOOKUP
  780. select GENERIC_CLOCKEVENTS
  781. select HAVE_CLK
  782. help
  783. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  784. config ARCH_VT8500
  785. bool "VIA/WonderMedia 85xx"
  786. select CPU_ARM926T
  787. select GENERIC_GPIO
  788. select ARCH_HAS_CPUFREQ
  789. select GENERIC_CLOCKEVENTS
  790. select ARCH_REQUIRE_GPIOLIB
  791. select HAVE_PWM
  792. help
  793. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  794. endchoice
  795. #
  796. # This is sorted alphabetically by mach-* pathname. However, plat-*
  797. # Kconfigs may be included either alphabetically (according to the
  798. # plat- suffix) or along side the corresponding mach-* source.
  799. #
  800. source "arch/arm/mach-at91/Kconfig"
  801. source "arch/arm/mach-bcmring/Kconfig"
  802. source "arch/arm/mach-clps711x/Kconfig"
  803. source "arch/arm/mach-cns3xxx/Kconfig"
  804. source "arch/arm/mach-davinci/Kconfig"
  805. source "arch/arm/mach-dove/Kconfig"
  806. source "arch/arm/mach-ep93xx/Kconfig"
  807. source "arch/arm/mach-footbridge/Kconfig"
  808. source "arch/arm/mach-gemini/Kconfig"
  809. source "arch/arm/mach-h720x/Kconfig"
  810. source "arch/arm/mach-integrator/Kconfig"
  811. source "arch/arm/mach-iop32x/Kconfig"
  812. source "arch/arm/mach-iop33x/Kconfig"
  813. source "arch/arm/mach-iop13xx/Kconfig"
  814. source "arch/arm/mach-ixp4xx/Kconfig"
  815. source "arch/arm/mach-ixp2000/Kconfig"
  816. source "arch/arm/mach-ixp23xx/Kconfig"
  817. source "arch/arm/mach-kirkwood/Kconfig"
  818. source "arch/arm/mach-ks8695/Kconfig"
  819. source "arch/arm/mach-loki/Kconfig"
  820. source "arch/arm/mach-lpc32xx/Kconfig"
  821. source "arch/arm/mach-msm/Kconfig"
  822. source "arch/arm/mach-mv78xx0/Kconfig"
  823. source "arch/arm/plat-mxc/Kconfig"
  824. source "arch/arm/mach-mxs/Kconfig"
  825. source "arch/arm/mach-netx/Kconfig"
  826. source "arch/arm/mach-nomadik/Kconfig"
  827. source "arch/arm/plat-nomadik/Kconfig"
  828. source "arch/arm/mach-ns9xxx/Kconfig"
  829. source "arch/arm/mach-nuc93x/Kconfig"
  830. source "arch/arm/plat-omap/Kconfig"
  831. source "arch/arm/mach-omap1/Kconfig"
  832. source "arch/arm/mach-omap2/Kconfig"
  833. source "arch/arm/mach-orion5x/Kconfig"
  834. source "arch/arm/mach-pxa/Kconfig"
  835. source "arch/arm/plat-pxa/Kconfig"
  836. source "arch/arm/mach-mmp/Kconfig"
  837. source "arch/arm/mach-realview/Kconfig"
  838. source "arch/arm/mach-sa1100/Kconfig"
  839. source "arch/arm/plat-samsung/Kconfig"
  840. source "arch/arm/plat-s3c24xx/Kconfig"
  841. source "arch/arm/plat-s5p/Kconfig"
  842. source "arch/arm/plat-spear/Kconfig"
  843. source "arch/arm/plat-tcc/Kconfig"
  844. if ARCH_S3C2410
  845. source "arch/arm/mach-s3c2400/Kconfig"
  846. source "arch/arm/mach-s3c2410/Kconfig"
  847. source "arch/arm/mach-s3c2412/Kconfig"
  848. source "arch/arm/mach-s3c2416/Kconfig"
  849. source "arch/arm/mach-s3c2440/Kconfig"
  850. source "arch/arm/mach-s3c2443/Kconfig"
  851. endif
  852. if ARCH_S3C64XX
  853. source "arch/arm/mach-s3c64xx/Kconfig"
  854. endif
  855. source "arch/arm/mach-s5p64x0/Kconfig"
  856. source "arch/arm/mach-s5p6442/Kconfig"
  857. source "arch/arm/mach-s5pc100/Kconfig"
  858. source "arch/arm/mach-s5pv210/Kconfig"
  859. source "arch/arm/mach-exynos4/Kconfig"
  860. source "arch/arm/mach-shmobile/Kconfig"
  861. source "arch/arm/plat-stmp3xxx/Kconfig"
  862. source "arch/arm/mach-tegra/Kconfig"
  863. source "arch/arm/mach-u300/Kconfig"
  864. source "arch/arm/mach-ux500/Kconfig"
  865. source "arch/arm/mach-versatile/Kconfig"
  866. source "arch/arm/mach-vexpress/Kconfig"
  867. source "arch/arm/plat-versatile/Kconfig"
  868. source "arch/arm/mach-vt8500/Kconfig"
  869. source "arch/arm/mach-w90x900/Kconfig"
  870. # Definitions to make life easier
  871. config ARCH_ACORN
  872. bool
  873. config PLAT_IOP
  874. bool
  875. select GENERIC_CLOCKEVENTS
  876. select HAVE_SCHED_CLOCK
  877. config PLAT_ORION
  878. bool
  879. select CLKSRC_MMIO
  880. select HAVE_SCHED_CLOCK
  881. config PLAT_PXA
  882. bool
  883. config PLAT_VERSATILE
  884. bool
  885. config ARM_TIMER_SP804
  886. bool
  887. select CLKSRC_MMIO
  888. source arch/arm/mm/Kconfig
  889. config IWMMXT
  890. bool "Enable iWMMXt support"
  891. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  892. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  893. help
  894. Enable support for iWMMXt context switching at run time if
  895. running on a CPU that supports it.
  896. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  897. config XSCALE_PMU
  898. bool
  899. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  900. default y
  901. config CPU_HAS_PMU
  902. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  903. (!ARCH_OMAP3 || OMAP3_EMU)
  904. default y
  905. bool
  906. config MULTI_IRQ_HANDLER
  907. bool
  908. help
  909. Allow each machine to specify it's own IRQ handler at run time.
  910. if !MMU
  911. source "arch/arm/Kconfig-nommu"
  912. endif
  913. config ARM_ERRATA_411920
  914. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  915. depends on CPU_V6 || CPU_V6K
  916. help
  917. Invalidation of the Instruction Cache operation can
  918. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  919. It does not affect the MPCore. This option enables the ARM Ltd.
  920. recommended workaround.
  921. config ARM_ERRATA_430973
  922. bool "ARM errata: Stale prediction on replaced interworking branch"
  923. depends on CPU_V7
  924. help
  925. This option enables the workaround for the 430973 Cortex-A8
  926. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  927. interworking branch is replaced with another code sequence at the
  928. same virtual address, whether due to self-modifying code or virtual
  929. to physical address re-mapping, Cortex-A8 does not recover from the
  930. stale interworking branch prediction. This results in Cortex-A8
  931. executing the new code sequence in the incorrect ARM or Thumb state.
  932. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  933. and also flushes the branch target cache at every context switch.
  934. Note that setting specific bits in the ACTLR register may not be
  935. available in non-secure mode.
  936. config ARM_ERRATA_458693
  937. bool "ARM errata: Processor deadlock when a false hazard is created"
  938. depends on CPU_V7
  939. help
  940. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  941. erratum. For very specific sequences of memory operations, it is
  942. possible for a hazard condition intended for a cache line to instead
  943. be incorrectly associated with a different cache line. This false
  944. hazard might then cause a processor deadlock. The workaround enables
  945. the L1 caching of the NEON accesses and disables the PLD instruction
  946. in the ACTLR register. Note that setting specific bits in the ACTLR
  947. register may not be available in non-secure mode.
  948. config ARM_ERRATA_460075
  949. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  950. depends on CPU_V7
  951. help
  952. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  953. erratum. Any asynchronous access to the L2 cache may encounter a
  954. situation in which recent store transactions to the L2 cache are lost
  955. and overwritten with stale memory contents from external memory. The
  956. workaround disables the write-allocate mode for the L2 cache via the
  957. ACTLR register. Note that setting specific bits in the ACTLR register
  958. may not be available in non-secure mode.
  959. config ARM_ERRATA_742230
  960. bool "ARM errata: DMB operation may be faulty"
  961. depends on CPU_V7 && SMP
  962. help
  963. This option enables the workaround for the 742230 Cortex-A9
  964. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  965. between two write operations may not ensure the correct visibility
  966. ordering of the two writes. This workaround sets a specific bit in
  967. the diagnostic register of the Cortex-A9 which causes the DMB
  968. instruction to behave as a DSB, ensuring the correct behaviour of
  969. the two writes.
  970. config ARM_ERRATA_742231
  971. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  972. depends on CPU_V7 && SMP
  973. help
  974. This option enables the workaround for the 742231 Cortex-A9
  975. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  976. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  977. accessing some data located in the same cache line, may get corrupted
  978. data due to bad handling of the address hazard when the line gets
  979. replaced from one of the CPUs at the same time as another CPU is
  980. accessing it. This workaround sets specific bits in the diagnostic
  981. register of the Cortex-A9 which reduces the linefill issuing
  982. capabilities of the processor.
  983. config PL310_ERRATA_588369
  984. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  985. depends on CACHE_L2X0
  986. help
  987. The PL310 L2 cache controller implements three types of Clean &
  988. Invalidate maintenance operations: by Physical Address
  989. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  990. They are architecturally defined to behave as the execution of a
  991. clean operation followed immediately by an invalidate operation,
  992. both performing to the same memory location. This functionality
  993. is not correctly implemented in PL310 as clean lines are not
  994. invalidated as a result of these operations.
  995. config ARM_ERRATA_720789
  996. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  997. depends on CPU_V7 && SMP
  998. help
  999. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1000. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1001. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1002. As a consequence of this erratum, some TLB entries which should be
  1003. invalidated are not, resulting in an incoherency in the system page
  1004. tables. The workaround changes the TLB flushing routines to invalidate
  1005. entries regardless of the ASID.
  1006. config PL310_ERRATA_727915
  1007. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1008. depends on CACHE_L2X0
  1009. help
  1010. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1011. operation (offset 0x7FC). This operation runs in background so that
  1012. PL310 can handle normal accesses while it is in progress. Under very
  1013. rare circumstances, due to this erratum, write data can be lost when
  1014. PL310 treats a cacheable write transaction during a Clean &
  1015. Invalidate by Way operation.
  1016. config ARM_ERRATA_743622
  1017. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1018. depends on CPU_V7
  1019. help
  1020. This option enables the workaround for the 743622 Cortex-A9
  1021. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1022. optimisation in the Cortex-A9 Store Buffer may lead to data
  1023. corruption. This workaround sets a specific bit in the diagnostic
  1024. register of the Cortex-A9 which disables the Store Buffer
  1025. optimisation, preventing the defect from occurring. This has no
  1026. visible impact on the overall performance or power consumption of the
  1027. processor.
  1028. config ARM_ERRATA_751472
  1029. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1030. depends on CPU_V7 && SMP
  1031. help
  1032. This option enables the workaround for the 751472 Cortex-A9 (prior
  1033. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1034. completion of a following broadcasted operation if the second
  1035. operation is received by a CPU before the ICIALLUIS has completed,
  1036. potentially leading to corrupted entries in the cache or TLB.
  1037. config ARM_ERRATA_753970
  1038. bool "ARM errata: cache sync operation may be faulty"
  1039. depends on CACHE_PL310
  1040. help
  1041. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1042. Under some condition the effect of cache sync operation on
  1043. the store buffer still remains when the operation completes.
  1044. This means that the store buffer is always asked to drain and
  1045. this prevents it from merging any further writes. The workaround
  1046. is to replace the normal offset of cache sync operation (0x730)
  1047. by another offset targeting an unmapped PL310 register 0x740.
  1048. This has the same effect as the cache sync operation: store buffer
  1049. drain and waiting for all buffers empty.
  1050. config ARM_ERRATA_754322
  1051. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1052. depends on CPU_V7
  1053. help
  1054. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1055. r3p*) erratum. A speculative memory access may cause a page table walk
  1056. which starts prior to an ASID switch but completes afterwards. This
  1057. can populate the micro-TLB with a stale entry which may be hit with
  1058. the new ASID. This workaround places two dsb instructions in the mm
  1059. switching code so that no page table walks can cross the ASID switch.
  1060. config ARM_ERRATA_754327
  1061. bool "ARM errata: no automatic Store Buffer drain"
  1062. depends on CPU_V7 && SMP
  1063. help
  1064. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1065. r2p0) erratum. The Store Buffer does not have any automatic draining
  1066. mechanism and therefore a livelock may occur if an external agent
  1067. continuously polls a memory location waiting to observe an update.
  1068. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1069. written polling loops from denying visibility of updates to memory.
  1070. endmenu
  1071. source "arch/arm/common/Kconfig"
  1072. menu "Bus support"
  1073. config ARM_AMBA
  1074. bool
  1075. config ISA
  1076. bool
  1077. help
  1078. Find out whether you have ISA slots on your motherboard. ISA is the
  1079. name of a bus system, i.e. the way the CPU talks to the other stuff
  1080. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1081. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1082. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1083. # Select ISA DMA controller support
  1084. config ISA_DMA
  1085. bool
  1086. select ISA_DMA_API
  1087. # Select ISA DMA interface
  1088. config ISA_DMA_API
  1089. bool
  1090. config PCI
  1091. bool "PCI support" if MIGHT_HAVE_PCI
  1092. help
  1093. Find out whether you have a PCI motherboard. PCI is the name of a
  1094. bus system, i.e. the way the CPU talks to the other stuff inside
  1095. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1096. VESA. If you have PCI, say Y, otherwise N.
  1097. config PCI_DOMAINS
  1098. bool
  1099. depends on PCI
  1100. config PCI_NANOENGINE
  1101. bool "BSE nanoEngine PCI support"
  1102. depends on SA1100_NANOENGINE
  1103. help
  1104. Enable PCI on the BSE nanoEngine board.
  1105. config PCI_SYSCALL
  1106. def_bool PCI
  1107. # Select the host bridge type
  1108. config PCI_HOST_VIA82C505
  1109. bool
  1110. depends on PCI && ARCH_SHARK
  1111. default y
  1112. config PCI_HOST_ITE8152
  1113. bool
  1114. depends on PCI && MACH_ARMCORE
  1115. default y
  1116. select DMABOUNCE
  1117. source "drivers/pci/Kconfig"
  1118. source "drivers/pcmcia/Kconfig"
  1119. endmenu
  1120. menu "Kernel Features"
  1121. source "kernel/time/Kconfig"
  1122. config SMP
  1123. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  1124. depends on EXPERIMENTAL
  1125. depends on CPU_V6K || CPU_V7
  1126. depends on GENERIC_CLOCKEVENTS
  1127. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1128. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1129. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1130. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1131. select USE_GENERIC_SMP_HELPERS
  1132. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1133. help
  1134. This enables support for systems with more than one CPU. If you have
  1135. a system with only one CPU, like most personal computers, say N. If
  1136. you have a system with more than one CPU, say Y.
  1137. If you say N here, the kernel will run on single and multiprocessor
  1138. machines, but will use only one CPU of a multiprocessor machine. If
  1139. you say Y here, the kernel will run on many, but not all, single
  1140. processor machines. On a single processor machine, the kernel will
  1141. run faster if you say N here.
  1142. See also <file:Documentation/i386/IO-APIC.txt>,
  1143. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1144. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1145. If you don't know what to do here, say N.
  1146. config SMP_ON_UP
  1147. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1148. depends on EXPERIMENTAL
  1149. depends on SMP && !XIP_KERNEL
  1150. default y
  1151. help
  1152. SMP kernels contain instructions which fail on non-SMP processors.
  1153. Enabling this option allows the kernel to modify itself to make
  1154. these instructions safe. Disabling it allows about 1K of space
  1155. savings.
  1156. If you don't know what to do here, say Y.
  1157. config HAVE_ARM_SCU
  1158. bool
  1159. depends on SMP
  1160. help
  1161. This option enables support for the ARM system coherency unit
  1162. config HAVE_ARM_TWD
  1163. bool
  1164. depends on SMP
  1165. select TICK_ONESHOT
  1166. help
  1167. This options enables support for the ARM timer and watchdog unit
  1168. choice
  1169. prompt "Memory split"
  1170. default VMSPLIT_3G
  1171. help
  1172. Select the desired split between kernel and user memory.
  1173. If you are not absolutely sure what you are doing, leave this
  1174. option alone!
  1175. config VMSPLIT_3G
  1176. bool "3G/1G user/kernel split"
  1177. config VMSPLIT_2G
  1178. bool "2G/2G user/kernel split"
  1179. config VMSPLIT_1G
  1180. bool "1G/3G user/kernel split"
  1181. endchoice
  1182. config PAGE_OFFSET
  1183. hex
  1184. default 0x40000000 if VMSPLIT_1G
  1185. default 0x80000000 if VMSPLIT_2G
  1186. default 0xC0000000
  1187. config NR_CPUS
  1188. int "Maximum number of CPUs (2-32)"
  1189. range 2 32
  1190. depends on SMP
  1191. default "4"
  1192. config HOTPLUG_CPU
  1193. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1194. depends on SMP && HOTPLUG && EXPERIMENTAL
  1195. depends on !ARCH_MSM
  1196. help
  1197. Say Y here to experiment with turning CPUs off and on. CPUs
  1198. can be controlled through /sys/devices/system/cpu.
  1199. config LOCAL_TIMERS
  1200. bool "Use local timer interrupts"
  1201. depends on SMP
  1202. default y
  1203. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1204. help
  1205. Enable support for local timers on SMP platforms, rather then the
  1206. legacy IPI broadcast method. Local timers allows the system
  1207. accounting to be spread across the timer interval, preventing a
  1208. "thundering herd" at every timer tick.
  1209. source kernel/Kconfig.preempt
  1210. config HZ
  1211. int
  1212. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1213. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_EXYNOS4
  1214. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1215. default AT91_TIMER_HZ if ARCH_AT91
  1216. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1217. default 100
  1218. config THUMB2_KERNEL
  1219. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1220. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1221. select AEABI
  1222. select ARM_ASM_UNIFIED
  1223. help
  1224. By enabling this option, the kernel will be compiled in
  1225. Thumb-2 mode. A compiler/assembler that understand the unified
  1226. ARM-Thumb syntax is needed.
  1227. If unsure, say N.
  1228. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1229. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1230. depends on THUMB2_KERNEL && MODULES
  1231. default y
  1232. help
  1233. Various binutils versions can resolve Thumb-2 branches to
  1234. locally-defined, preemptible global symbols as short-range "b.n"
  1235. branch instructions.
  1236. This is a problem, because there's no guarantee the final
  1237. destination of the symbol, or any candidate locations for a
  1238. trampoline, are within range of the branch. For this reason, the
  1239. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1240. relocation in modules at all, and it makes little sense to add
  1241. support.
  1242. The symptom is that the kernel fails with an "unsupported
  1243. relocation" error when loading some modules.
  1244. Until fixed tools are available, passing
  1245. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1246. code which hits this problem, at the cost of a bit of extra runtime
  1247. stack usage in some cases.
  1248. The problem is described in more detail at:
  1249. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1250. Only Thumb-2 kernels are affected.
  1251. Unless you are sure your tools don't have this problem, say Y.
  1252. config ARM_ASM_UNIFIED
  1253. bool
  1254. config AEABI
  1255. bool "Use the ARM EABI to compile the kernel"
  1256. help
  1257. This option allows for the kernel to be compiled using the latest
  1258. ARM ABI (aka EABI). This is only useful if you are using a user
  1259. space environment that is also compiled with EABI.
  1260. Since there are major incompatibilities between the legacy ABI and
  1261. EABI, especially with regard to structure member alignment, this
  1262. option also changes the kernel syscall calling convention to
  1263. disambiguate both ABIs and allow for backward compatibility support
  1264. (selected with CONFIG_OABI_COMPAT).
  1265. To use this you need GCC version 4.0.0 or later.
  1266. config OABI_COMPAT
  1267. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1268. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1269. default y
  1270. help
  1271. This option preserves the old syscall interface along with the
  1272. new (ARM EABI) one. It also provides a compatibility layer to
  1273. intercept syscalls that have structure arguments which layout
  1274. in memory differs between the legacy ABI and the new ARM EABI
  1275. (only for non "thumb" binaries). This option adds a tiny
  1276. overhead to all syscalls and produces a slightly larger kernel.
  1277. If you know you'll be using only pure EABI user space then you
  1278. can say N here. If this option is not selected and you attempt
  1279. to execute a legacy ABI binary then the result will be
  1280. UNPREDICTABLE (in fact it can be predicted that it won't work
  1281. at all). If in doubt say Y.
  1282. config ARCH_HAS_HOLES_MEMORYMODEL
  1283. bool
  1284. config ARCH_SPARSEMEM_ENABLE
  1285. bool
  1286. config ARCH_SPARSEMEM_DEFAULT
  1287. def_bool ARCH_SPARSEMEM_ENABLE
  1288. config ARCH_SELECT_MEMORY_MODEL
  1289. def_bool ARCH_SPARSEMEM_ENABLE
  1290. config HIGHMEM
  1291. bool "High Memory Support (EXPERIMENTAL)"
  1292. depends on MMU && EXPERIMENTAL
  1293. help
  1294. The address space of ARM processors is only 4 Gigabytes large
  1295. and it has to accommodate user address space, kernel address
  1296. space as well as some memory mapped IO. That means that, if you
  1297. have a large amount of physical memory and/or IO, not all of the
  1298. memory can be "permanently mapped" by the kernel. The physical
  1299. memory that is not permanently mapped is called "high memory".
  1300. Depending on the selected kernel/user memory split, minimum
  1301. vmalloc space and actual amount of RAM, you may not need this
  1302. option which should result in a slightly faster kernel.
  1303. If unsure, say n.
  1304. config HIGHPTE
  1305. bool "Allocate 2nd-level pagetables from highmem"
  1306. depends on HIGHMEM
  1307. config HW_PERF_EVENTS
  1308. bool "Enable hardware performance counter support for perf events"
  1309. depends on PERF_EVENTS && CPU_HAS_PMU
  1310. default y
  1311. help
  1312. Enable hardware performance counter support for perf events. If
  1313. disabled, perf events will use software events only.
  1314. source "mm/Kconfig"
  1315. config FORCE_MAX_ZONEORDER
  1316. int "Maximum zone order" if ARCH_SHMOBILE
  1317. range 11 64 if ARCH_SHMOBILE
  1318. default "9" if SA1111
  1319. default "11"
  1320. help
  1321. The kernel memory allocator divides physically contiguous memory
  1322. blocks into "zones", where each zone is a power of two number of
  1323. pages. This option selects the largest power of two that the kernel
  1324. keeps in the memory allocator. If you need to allocate very large
  1325. blocks of physically contiguous memory, then you may need to
  1326. increase this value.
  1327. This config option is actually maximum order plus one. For example,
  1328. a value of 11 means that the largest free memory block is 2^10 pages.
  1329. config LEDS
  1330. bool "Timer and CPU usage LEDs"
  1331. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1332. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1333. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1334. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1335. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1336. ARCH_AT91 || ARCH_DAVINCI || \
  1337. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1338. help
  1339. If you say Y here, the LEDs on your machine will be used
  1340. to provide useful information about your current system status.
  1341. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1342. be able to select which LEDs are active using the options below. If
  1343. you are compiling a kernel for the EBSA-110 or the LART however, the
  1344. red LED will simply flash regularly to indicate that the system is
  1345. still functional. It is safe to say Y here if you have a CATS
  1346. system, but the driver will do nothing.
  1347. config LEDS_TIMER
  1348. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1349. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1350. || MACH_OMAP_PERSEUS2
  1351. depends on LEDS
  1352. depends on !GENERIC_CLOCKEVENTS
  1353. default y if ARCH_EBSA110
  1354. help
  1355. If you say Y here, one of the system LEDs (the green one on the
  1356. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1357. will flash regularly to indicate that the system is still
  1358. operational. This is mainly useful to kernel hackers who are
  1359. debugging unstable kernels.
  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 LEDS_CPU
  1364. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1365. !ARCH_OMAP) \
  1366. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1367. || MACH_OMAP_PERSEUS2
  1368. depends on LEDS
  1369. help
  1370. If you say Y here, the red LED will be used to give a good real
  1371. time indication of CPU usage, by lighting whenever the idle task
  1372. is not currently executing.
  1373. The LART uses the same LED for both Timer LED and CPU usage LED
  1374. functions. You may choose to use both, but the Timer LED function
  1375. will overrule the CPU usage LED.
  1376. config ALIGNMENT_TRAP
  1377. bool
  1378. depends on CPU_CP15_MMU
  1379. default y if !ARCH_EBSA110
  1380. select HAVE_PROC_CPU if PROC_FS
  1381. help
  1382. ARM processors cannot fetch/store information which is not
  1383. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1384. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1385. fetch/store instructions will be emulated in software if you say
  1386. here, which has a severe performance impact. This is necessary for
  1387. correct operation of some network protocols. With an IP-only
  1388. configuration it is safe to say N, otherwise say Y.
  1389. config UACCESS_WITH_MEMCPY
  1390. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1391. depends on MMU && EXPERIMENTAL
  1392. default y if CPU_FEROCEON
  1393. help
  1394. Implement faster copy_to_user and clear_user methods for CPU
  1395. cores where a 8-word STM instruction give significantly higher
  1396. memory write throughput than a sequence of individual 32bit stores.
  1397. A possible side effect is a slight increase in scheduling latency
  1398. between threads sharing the same address space if they invoke
  1399. such copy operations with large buffers.
  1400. However, if the CPU data cache is using a write-allocate mode,
  1401. this option is unlikely to provide any performance gain.
  1402. config SECCOMP
  1403. bool
  1404. prompt "Enable seccomp to safely compute untrusted bytecode"
  1405. ---help---
  1406. This kernel feature is useful for number crunching applications
  1407. that may need to compute untrusted bytecode during their
  1408. execution. By using pipes or other transports made available to
  1409. the process as file descriptors supporting the read/write
  1410. syscalls, it's possible to isolate those applications in
  1411. their own address space using seccomp. Once seccomp is
  1412. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1413. and the task is only allowed to execute a few safe syscalls
  1414. defined by each seccomp mode.
  1415. config CC_STACKPROTECTOR
  1416. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1417. depends on EXPERIMENTAL
  1418. help
  1419. This option turns on the -fstack-protector GCC feature. This
  1420. feature puts, at the beginning of functions, a canary value on
  1421. the stack just before the return address, and validates
  1422. the value just before actually returning. Stack based buffer
  1423. overflows (that need to overwrite this return address) now also
  1424. overwrite the canary, which gets detected and the attack is then
  1425. neutralized via a kernel panic.
  1426. This feature requires gcc version 4.2 or above.
  1427. config DEPRECATED_PARAM_STRUCT
  1428. bool "Provide old way to pass kernel parameters"
  1429. help
  1430. This was deprecated in 2001 and announced to live on for 5 years.
  1431. Some old boot loaders still use this way.
  1432. endmenu
  1433. menu "Boot options"
  1434. # Compressed boot loader in ROM. Yes, we really want to ask about
  1435. # TEXT and BSS so we preserve their values in the config files.
  1436. config ZBOOT_ROM_TEXT
  1437. hex "Compressed ROM boot loader base address"
  1438. default "0"
  1439. help
  1440. The physical address at which the ROM-able zImage is to be
  1441. placed in the target. Platforms which normally make use of
  1442. ROM-able zImage formats normally set this to a suitable
  1443. value in their defconfig file.
  1444. If ZBOOT_ROM is not enabled, this has no effect.
  1445. config ZBOOT_ROM_BSS
  1446. hex "Compressed ROM boot loader BSS address"
  1447. default "0"
  1448. help
  1449. The base address of an area of read/write memory in the target
  1450. for the ROM-able zImage which must be available while the
  1451. decompressor is running. It must be large enough to hold the
  1452. entire decompressed kernel plus an additional 128 KiB.
  1453. Platforms which normally make use of ROM-able zImage formats
  1454. normally set this to a suitable value in their defconfig file.
  1455. If ZBOOT_ROM is not enabled, this has no effect.
  1456. config ZBOOT_ROM
  1457. bool "Compressed boot loader in ROM/flash"
  1458. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1459. help
  1460. Say Y here if you intend to execute your compressed kernel image
  1461. (zImage) directly from ROM or flash. If unsure, say N.
  1462. config ZBOOT_ROM_MMCIF
  1463. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1464. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1465. help
  1466. Say Y here to include experimental MMCIF loading code in the
  1467. ROM-able zImage. With this enabled it is possible to write the
  1468. the ROM-able zImage kernel image to an MMC card and boot the
  1469. kernel straight from the reset vector. At reset the processor
  1470. Mask ROM will load the first part of the the ROM-able zImage
  1471. which in turn loads the rest the kernel image to RAM using the
  1472. MMCIF hardware block.
  1473. config CMDLINE
  1474. string "Default kernel command string"
  1475. default ""
  1476. help
  1477. On some architectures (EBSA110 and CATS), there is currently no way
  1478. for the boot loader to pass arguments to the kernel. For these
  1479. architectures, you should supply some command-line options at build
  1480. time by entering them here. As a minimum, you should specify the
  1481. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1482. config CMDLINE_FORCE
  1483. bool "Always use the default kernel command string"
  1484. depends on CMDLINE != ""
  1485. help
  1486. Always use the default kernel command string, even if the boot
  1487. loader passes other arguments to the kernel.
  1488. This is useful if you cannot or don't want to change the
  1489. command-line options your boot loader passes to the kernel.
  1490. If unsure, say N.
  1491. config XIP_KERNEL
  1492. bool "Kernel Execute-In-Place from ROM"
  1493. depends on !ZBOOT_ROM
  1494. help
  1495. Execute-In-Place allows the kernel to run from non-volatile storage
  1496. directly addressable by the CPU, such as NOR flash. This saves RAM
  1497. space since the text section of the kernel is not loaded from flash
  1498. to RAM. Read-write sections, such as the data section and stack,
  1499. are still copied to RAM. The XIP kernel is not compressed since
  1500. it has to run directly from flash, so it will take more space to
  1501. store it. The flash address used to link the kernel object files,
  1502. and for storing it, is configuration dependent. Therefore, if you
  1503. say Y here, you must know the proper physical address where to
  1504. store the kernel image depending on your own flash memory usage.
  1505. Also note that the make target becomes "make xipImage" rather than
  1506. "make zImage" or "make Image". The final kernel binary to put in
  1507. ROM memory will be arch/arm/boot/xipImage.
  1508. If unsure, say N.
  1509. config XIP_PHYS_ADDR
  1510. hex "XIP Kernel Physical Location"
  1511. depends on XIP_KERNEL
  1512. default "0x00080000"
  1513. help
  1514. This is the physical address in your flash memory the kernel will
  1515. be linked for and stored to. This address is dependent on your
  1516. own flash usage.
  1517. config KEXEC
  1518. bool "Kexec system call (EXPERIMENTAL)"
  1519. depends on EXPERIMENTAL
  1520. help
  1521. kexec is a system call that implements the ability to shutdown your
  1522. current kernel, and to start another kernel. It is like a reboot
  1523. but it is independent of the system firmware. And like a reboot
  1524. you can start any kernel with it, not just Linux.
  1525. It is an ongoing process to be certain the hardware in a machine
  1526. is properly shutdown, so do not be surprised if this code does not
  1527. initially work for you. It may help to enable device hotplugging
  1528. support.
  1529. config ATAGS_PROC
  1530. bool "Export atags in procfs"
  1531. depends on KEXEC
  1532. default y
  1533. help
  1534. Should the atags used to boot the kernel be exported in an "atags"
  1535. file in procfs. Useful with kexec.
  1536. config CRASH_DUMP
  1537. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1538. depends on EXPERIMENTAL
  1539. help
  1540. Generate crash dump after being started by kexec. This should
  1541. be normally only set in special crash dump kernels which are
  1542. loaded in the main kernel with kexec-tools into a specially
  1543. reserved region and then later executed after a crash by
  1544. kdump/kexec. The crash dump kernel must be compiled to a
  1545. memory address not used by the main kernel
  1546. For more details see Documentation/kdump/kdump.txt
  1547. config AUTO_ZRELADDR
  1548. bool "Auto calculation of the decompressed kernel image address"
  1549. depends on !ZBOOT_ROM && !ARCH_U300
  1550. help
  1551. ZRELADDR is the physical address where the decompressed kernel
  1552. image will be placed. If AUTO_ZRELADDR is selected, the address
  1553. will be determined at run-time by masking the current IP with
  1554. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1555. from start of memory.
  1556. endmenu
  1557. menu "CPU Power Management"
  1558. if ARCH_HAS_CPUFREQ
  1559. source "drivers/cpufreq/Kconfig"
  1560. config CPU_FREQ_IMX
  1561. tristate "CPUfreq driver for i.MX CPUs"
  1562. depends on ARCH_MXC && CPU_FREQ
  1563. help
  1564. This enables the CPUfreq driver for i.MX CPUs.
  1565. config CPU_FREQ_SA1100
  1566. bool
  1567. config CPU_FREQ_SA1110
  1568. bool
  1569. config CPU_FREQ_INTEGRATOR
  1570. tristate "CPUfreq driver for ARM Integrator CPUs"
  1571. depends on ARCH_INTEGRATOR && CPU_FREQ
  1572. default y
  1573. help
  1574. This enables the CPUfreq driver for ARM Integrator CPUs.
  1575. For details, take a look at <file:Documentation/cpu-freq>.
  1576. If in doubt, say Y.
  1577. config CPU_FREQ_PXA
  1578. bool
  1579. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1580. default y
  1581. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1582. config CPU_FREQ_S3C64XX
  1583. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1584. depends on CPU_FREQ && CPU_S3C6410
  1585. config CPU_FREQ_S3C
  1586. bool
  1587. help
  1588. Internal configuration node for common cpufreq on Samsung SoC
  1589. config CPU_FREQ_S3C24XX
  1590. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1591. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1592. select CPU_FREQ_S3C
  1593. help
  1594. This enables the CPUfreq driver for the Samsung S3C24XX family
  1595. of CPUs.
  1596. For details, take a look at <file:Documentation/cpu-freq>.
  1597. If in doubt, say N.
  1598. config CPU_FREQ_S3C24XX_PLL
  1599. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1600. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1601. help
  1602. Compile in support for changing the PLL frequency from the
  1603. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1604. after a frequency change, so by default it is not enabled.
  1605. This also means that the PLL tables for the selected CPU(s) will
  1606. be built which may increase the size of the kernel image.
  1607. config CPU_FREQ_S3C24XX_DEBUG
  1608. bool "Debug CPUfreq Samsung driver core"
  1609. depends on CPU_FREQ_S3C24XX
  1610. help
  1611. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1612. config CPU_FREQ_S3C24XX_IODEBUG
  1613. bool "Debug CPUfreq Samsung driver IO timing"
  1614. depends on CPU_FREQ_S3C24XX
  1615. help
  1616. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1617. config CPU_FREQ_S3C24XX_DEBUGFS
  1618. bool "Export debugfs for CPUFreq"
  1619. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1620. help
  1621. Export status information via debugfs.
  1622. endif
  1623. source "drivers/cpuidle/Kconfig"
  1624. endmenu
  1625. menu "Floating point emulation"
  1626. comment "At least one emulation must be selected"
  1627. config FPE_NWFPE
  1628. bool "NWFPE math emulation"
  1629. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1630. ---help---
  1631. Say Y to include the NWFPE floating point emulator in the kernel.
  1632. This is necessary to run most binaries. Linux does not currently
  1633. support floating point hardware so you need to say Y here even if
  1634. your machine has an FPA or floating point co-processor podule.
  1635. You may say N here if you are going to load the Acorn FPEmulator
  1636. early in the bootup.
  1637. config FPE_NWFPE_XP
  1638. bool "Support extended precision"
  1639. depends on FPE_NWFPE
  1640. help
  1641. Say Y to include 80-bit support in the kernel floating-point
  1642. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1643. Note that gcc does not generate 80-bit operations by default,
  1644. so in most cases this option only enlarges the size of the
  1645. floating point emulator without any good reason.
  1646. You almost surely want to say N here.
  1647. config FPE_FASTFPE
  1648. bool "FastFPE math emulation (EXPERIMENTAL)"
  1649. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1650. ---help---
  1651. Say Y here to include the FAST floating point emulator in the kernel.
  1652. This is an experimental much faster emulator which now also has full
  1653. precision for the mantissa. It does not support any exceptions.
  1654. It is very simple, and approximately 3-6 times faster than NWFPE.
  1655. It should be sufficient for most programs. It may be not suitable
  1656. for scientific calculations, but you have to check this for yourself.
  1657. If you do not feel you need a faster FP emulation you should better
  1658. choose NWFPE.
  1659. config VFP
  1660. bool "VFP-format floating point maths"
  1661. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1662. help
  1663. Say Y to include VFP support code in the kernel. This is needed
  1664. if your hardware includes a VFP unit.
  1665. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1666. release notes and additional status information.
  1667. Say N if your target does not have VFP hardware.
  1668. config VFPv3
  1669. bool
  1670. depends on VFP
  1671. default y if CPU_V7
  1672. config NEON
  1673. bool "Advanced SIMD (NEON) Extension support"
  1674. depends on VFPv3 && CPU_V7
  1675. help
  1676. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1677. Extension.
  1678. endmenu
  1679. menu "Userspace binary formats"
  1680. source "fs/Kconfig.binfmt"
  1681. config ARTHUR
  1682. tristate "RISC OS personality"
  1683. depends on !AEABI
  1684. help
  1685. Say Y here to include the kernel code necessary if you want to run
  1686. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1687. experimental; if this sounds frightening, say N and sleep in peace.
  1688. You can also say M here to compile this support as a module (which
  1689. will be called arthur).
  1690. endmenu
  1691. menu "Power management options"
  1692. source "kernel/power/Kconfig"
  1693. config ARCH_SUSPEND_POSSIBLE
  1694. depends on !ARCH_S5P64X0 && !ARCH_S5P6442
  1695. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1696. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1697. def_bool y
  1698. endmenu
  1699. source "net/Kconfig"
  1700. source "drivers/Kconfig"
  1701. source "fs/Kconfig"
  1702. source "arch/arm/Kconfig.debug"
  1703. source "security/Kconfig"
  1704. source "crypto/Kconfig"
  1705. source "lib/Kconfig"