Kconfig 59 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
  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 ARM_HAS_SG_CHAIN
  40. bool
  41. config HAVE_PWM
  42. bool
  43. config MIGHT_HAVE_PCI
  44. bool
  45. config SYS_SUPPORTS_APM_EMULATION
  46. bool
  47. config HAVE_SCHED_CLOCK
  48. bool
  49. config GENERIC_GPIO
  50. bool
  51. config ARCH_USES_GETTIMEOFFSET
  52. bool
  53. default n
  54. config GENERIC_CLOCKEVENTS
  55. bool
  56. config GENERIC_CLOCKEVENTS_BROADCAST
  57. bool
  58. depends on GENERIC_CLOCKEVENTS
  59. default y if SMP
  60. config KTIME_SCALAR
  61. bool
  62. default y
  63. config HAVE_TCM
  64. bool
  65. select GENERIC_ALLOCATOR
  66. config HAVE_PROC_CPU
  67. bool
  68. config NO_IOPORT
  69. bool
  70. config EISA
  71. bool
  72. ---help---
  73. The Extended Industry Standard Architecture (EISA) bus was
  74. developed as an open alternative to the IBM MicroChannel bus.
  75. The EISA bus provided some of the features of the IBM MicroChannel
  76. bus while maintaining backward compatibility with cards made for
  77. the older ISA bus. The EISA bus saw limited use between 1988 and
  78. 1995 when it was made obsolete by the PCI bus.
  79. Say Y here if you are building a kernel for an EISA-based machine.
  80. Otherwise, say N.
  81. config SBUS
  82. bool
  83. config MCA
  84. bool
  85. help
  86. MicroChannel Architecture is found in some IBM PS/2 machines and
  87. laptops. It is a bus system similar to PCI or ISA. See
  88. <file:Documentation/mca.txt> (and especially the web page given
  89. there) before attempting to build an MCA bus kernel.
  90. config STACKTRACE_SUPPORT
  91. bool
  92. default y
  93. config HAVE_LATENCYTOP_SUPPORT
  94. bool
  95. depends on !SMP
  96. default y
  97. config LOCKDEP_SUPPORT
  98. bool
  99. default y
  100. config TRACE_IRQFLAGS_SUPPORT
  101. bool
  102. default y
  103. config HARDIRQS_SW_RESEND
  104. bool
  105. default y
  106. config GENERIC_IRQ_PROBE
  107. bool
  108. default y
  109. config GENERIC_LOCKBREAK
  110. bool
  111. default y
  112. depends on SMP && PREEMPT
  113. config RWSEM_GENERIC_SPINLOCK
  114. bool
  115. default y
  116. config RWSEM_XCHGADD_ALGORITHM
  117. bool
  118. config ARCH_HAS_ILOG2_U32
  119. bool
  120. config ARCH_HAS_ILOG2_U64
  121. bool
  122. config ARCH_HAS_CPUFREQ
  123. bool
  124. help
  125. Internal node to signify that the ARCH has CPUFREQ support
  126. and that the relevant menu configurations are displayed for
  127. it.
  128. config ARCH_HAS_CPU_IDLE_WAIT
  129. def_bool y
  130. config GENERIC_HWEIGHT
  131. bool
  132. default y
  133. config GENERIC_CALIBRATE_DELAY
  134. bool
  135. default y
  136. config ARCH_MAY_HAVE_PC_FDC
  137. bool
  138. config ZONE_DMA
  139. bool
  140. config NEED_DMA_MAP_STATE
  141. def_bool y
  142. config GENERIC_ISA_DMA
  143. bool
  144. config FIQ
  145. bool
  146. config ARCH_MTD_XIP
  147. bool
  148. config VECTORS_BASE
  149. hex
  150. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  151. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  152. default 0x00000000
  153. help
  154. The base address of exception vectors.
  155. config ARM_PATCH_PHYS_VIRT
  156. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  157. default y
  158. depends on !XIP_KERNEL && MMU
  159. depends on !ARCH_REALVIEW || !SPARSEMEM
  160. help
  161. Patch phys-to-virt and virt-to-phys translation functions at
  162. boot and module load time according to the position of the
  163. kernel in system memory.
  164. This can only be used with non-XIP MMU kernels where the base
  165. of physical memory is at a 16MB boundary.
  166. Only disable this option if you know that you do not require
  167. this feature (eg, building a kernel for a single machine) and
  168. you need to shrink the kernel to the minimal size.
  169. config NO_MACH_MEMORY_H
  170. bool
  171. help
  172. Select this when mach/memory.h is removed.
  173. config PHYS_OFFSET
  174. hex "Physical address of main memory"
  175. depends on !ARM_PATCH_PHYS_VIRT && NO_MACH_MEMORY_H
  176. help
  177. Please provide the physical address corresponding to the
  178. location of main memory in your system.
  179. source "init/Kconfig"
  180. source "kernel/Kconfig.freezer"
  181. menu "System Type"
  182. config MMU
  183. bool "MMU-based Paged Memory Management Support"
  184. default y
  185. help
  186. Select if you want MMU-based virtualised addressing space
  187. support by paged memory management. If unsure, say 'Y'.
  188. #
  189. # The "ARM system type" choice list is ordered alphabetically by option
  190. # text. Please add new entries in the option alphabetic order.
  191. #
  192. choice
  193. prompt "ARM system type"
  194. default ARCH_VERSATILE
  195. config ARCH_INTEGRATOR
  196. bool "ARM Ltd. Integrator family"
  197. select ARM_AMBA
  198. select ARCH_HAS_CPUFREQ
  199. select CLKDEV_LOOKUP
  200. select HAVE_MACH_CLKDEV
  201. select ICST
  202. select GENERIC_CLOCKEVENTS
  203. select PLAT_VERSATILE
  204. select PLAT_VERSATILE_FPGA_IRQ
  205. help
  206. Support for ARM's Integrator platform.
  207. config ARCH_REALVIEW
  208. bool "ARM Ltd. RealView family"
  209. select ARM_AMBA
  210. select CLKDEV_LOOKUP
  211. select HAVE_MACH_CLKDEV
  212. select ICST
  213. select GENERIC_CLOCKEVENTS
  214. select ARCH_WANT_OPTIONAL_GPIOLIB
  215. select PLAT_VERSATILE
  216. select PLAT_VERSATILE_CLCD
  217. select ARM_TIMER_SP804
  218. select GPIO_PL061 if GPIOLIB
  219. help
  220. This enables support for ARM Ltd RealView boards.
  221. config ARCH_VERSATILE
  222. bool "ARM Ltd. Versatile family"
  223. select ARM_AMBA
  224. select ARM_VIC
  225. select CLKDEV_LOOKUP
  226. select HAVE_MACH_CLKDEV
  227. select ICST
  228. select GENERIC_CLOCKEVENTS
  229. select ARCH_WANT_OPTIONAL_GPIOLIB
  230. select PLAT_VERSATILE
  231. select PLAT_VERSATILE_CLCD
  232. select PLAT_VERSATILE_FPGA_IRQ
  233. select ARM_TIMER_SP804
  234. help
  235. This enables support for ARM Ltd Versatile board.
  236. config ARCH_VEXPRESS
  237. bool "ARM Ltd. Versatile Express family"
  238. select ARCH_WANT_OPTIONAL_GPIOLIB
  239. select ARM_AMBA
  240. select ARM_TIMER_SP804
  241. select CLKDEV_LOOKUP
  242. select HAVE_MACH_CLKDEV
  243. select GENERIC_CLOCKEVENTS
  244. select HAVE_CLK
  245. select HAVE_PATA_PLATFORM
  246. select ICST
  247. select PLAT_VERSATILE
  248. select PLAT_VERSATILE_CLCD
  249. help
  250. This enables support for the ARM Ltd Versatile Express boards.
  251. config ARCH_AT91
  252. bool "Atmel AT91"
  253. select ARCH_REQUIRE_GPIOLIB
  254. select HAVE_CLK
  255. select CLKDEV_LOOKUP
  256. help
  257. This enables support for systems based on the Atmel AT91RM9200,
  258. AT91SAM9 and AT91CAP9 processors.
  259. config ARCH_BCMRING
  260. bool "Broadcom BCMRING"
  261. depends on MMU
  262. select CPU_V6
  263. select ARM_AMBA
  264. select ARM_TIMER_SP804
  265. select CLKDEV_LOOKUP
  266. select GENERIC_CLOCKEVENTS
  267. select ARCH_WANT_OPTIONAL_GPIOLIB
  268. help
  269. Support for Broadcom's BCMRing platform.
  270. config ARCH_CLPS711X
  271. bool "Cirrus Logic CLPS711x/EP721x-based"
  272. select CPU_ARM720T
  273. select ARCH_USES_GETTIMEOFFSET
  274. help
  275. Support for Cirrus Logic 711x/721x based boards.
  276. config ARCH_CNS3XXX
  277. bool "Cavium Networks CNS3XXX family"
  278. select CPU_V6K
  279. select GENERIC_CLOCKEVENTS
  280. select ARM_GIC
  281. select MIGHT_HAVE_PCI
  282. select PCI_DOMAINS if PCI
  283. help
  284. Support for Cavium Networks CNS3XXX platform.
  285. config ARCH_GEMINI
  286. bool "Cortina Systems Gemini"
  287. select CPU_FA526
  288. select ARCH_REQUIRE_GPIOLIB
  289. select ARCH_USES_GETTIMEOFFSET
  290. help
  291. Support for the Cortina Systems Gemini family SoCs
  292. config ARCH_PRIMA2
  293. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  294. select CPU_V7
  295. select GENERIC_TIME
  296. select NO_IOPORT
  297. select GENERIC_CLOCKEVENTS
  298. select CLKDEV_LOOKUP
  299. select GENERIC_IRQ_CHIP
  300. select USE_OF
  301. select ZONE_DMA
  302. help
  303. Support for CSR SiRFSoC ARM Cortex A9 Platform
  304. config ARCH_EBSA110
  305. bool "EBSA-110"
  306. select CPU_SA110
  307. select ISA
  308. select NO_IOPORT
  309. select ARCH_USES_GETTIMEOFFSET
  310. help
  311. This is an evaluation board for the StrongARM processor available
  312. from Digital. It has limited hardware on-board, including an
  313. Ethernet interface, two PCMCIA sockets, two serial ports and a
  314. parallel port.
  315. config ARCH_EP93XX
  316. bool "EP93xx-based"
  317. select CPU_ARM920T
  318. select ARM_AMBA
  319. select ARM_VIC
  320. select CLKDEV_LOOKUP
  321. select ARCH_REQUIRE_GPIOLIB
  322. select ARCH_HAS_HOLES_MEMORYMODEL
  323. select ARCH_USES_GETTIMEOFFSET
  324. help
  325. This enables support for the Cirrus EP93xx series of CPUs.
  326. config ARCH_FOOTBRIDGE
  327. bool "FootBridge"
  328. select CPU_SA110
  329. select FOOTBRIDGE
  330. select GENERIC_CLOCKEVENTS
  331. help
  332. Support for systems based on the DC21285 companion chip
  333. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  334. config ARCH_MXC
  335. bool "Freescale MXC/iMX-based"
  336. select GENERIC_CLOCKEVENTS
  337. select ARCH_REQUIRE_GPIOLIB
  338. select CLKDEV_LOOKUP
  339. select CLKSRC_MMIO
  340. select GENERIC_IRQ_CHIP
  341. select HAVE_SCHED_CLOCK
  342. help
  343. Support for Freescale MXC/iMX-based family of processors
  344. config ARCH_MXS
  345. bool "Freescale MXS-based"
  346. select GENERIC_CLOCKEVENTS
  347. select ARCH_REQUIRE_GPIOLIB
  348. select CLKDEV_LOOKUP
  349. select CLKSRC_MMIO
  350. help
  351. Support for Freescale MXS-based family of processors
  352. config ARCH_NETX
  353. bool "Hilscher NetX based"
  354. select CLKSRC_MMIO
  355. select CPU_ARM926T
  356. select ARM_VIC
  357. select GENERIC_CLOCKEVENTS
  358. help
  359. This enables support for systems based on the Hilscher NetX Soc
  360. config ARCH_H720X
  361. bool "Hynix HMS720x-based"
  362. select CPU_ARM720T
  363. select ISA_DMA_API
  364. select ARCH_USES_GETTIMEOFFSET
  365. help
  366. This enables support for systems based on the Hynix HMS720x
  367. config ARCH_IOP13XX
  368. bool "IOP13xx-based"
  369. depends on MMU
  370. select CPU_XSC3
  371. select PLAT_IOP
  372. select PCI
  373. select ARCH_SUPPORTS_MSI
  374. select VMSPLIT_1G
  375. help
  376. Support for Intel's IOP13XX (XScale) family of processors.
  377. config ARCH_IOP32X
  378. bool "IOP32x-based"
  379. depends on MMU
  380. select CPU_XSCALE
  381. select PLAT_IOP
  382. select PCI
  383. select ARCH_REQUIRE_GPIOLIB
  384. help
  385. Support for Intel's 80219 and IOP32X (XScale) family of
  386. processors.
  387. config ARCH_IOP33X
  388. bool "IOP33x-based"
  389. depends on MMU
  390. select CPU_XSCALE
  391. select PLAT_IOP
  392. select PCI
  393. select ARCH_REQUIRE_GPIOLIB
  394. help
  395. Support for Intel's IOP33X (XScale) family of processors.
  396. config ARCH_IXP23XX
  397. bool "IXP23XX-based"
  398. depends on MMU
  399. select CPU_XSC3
  400. select PCI
  401. select ARCH_USES_GETTIMEOFFSET
  402. help
  403. Support for Intel's IXP23xx (XScale) family of processors.
  404. config ARCH_IXP2000
  405. bool "IXP2400/2800-based"
  406. depends on MMU
  407. select CPU_XSCALE
  408. select PCI
  409. select ARCH_USES_GETTIMEOFFSET
  410. help
  411. Support for Intel's IXP2400/2800 (XScale) family of processors.
  412. config ARCH_IXP4XX
  413. bool "IXP4xx-based"
  414. depends on MMU
  415. select CLKSRC_MMIO
  416. select CPU_XSCALE
  417. select GENERIC_GPIO
  418. select GENERIC_CLOCKEVENTS
  419. select HAVE_SCHED_CLOCK
  420. select MIGHT_HAVE_PCI
  421. select DMABOUNCE if PCI
  422. help
  423. Support for Intel's IXP4XX (XScale) family of processors.
  424. config ARCH_DOVE
  425. bool "Marvell Dove"
  426. select CPU_V7
  427. select PCI
  428. select ARCH_REQUIRE_GPIOLIB
  429. select GENERIC_CLOCKEVENTS
  430. select PLAT_ORION
  431. select NO_MACH_MEMORY_H
  432. help
  433. Support for the Marvell Dove SoC 88AP510
  434. config ARCH_KIRKWOOD
  435. bool "Marvell Kirkwood"
  436. select CPU_FEROCEON
  437. select PCI
  438. select ARCH_REQUIRE_GPIOLIB
  439. select GENERIC_CLOCKEVENTS
  440. select PLAT_ORION
  441. help
  442. Support for the following Marvell Kirkwood series SoCs:
  443. 88F6180, 88F6192 and 88F6281.
  444. config ARCH_LPC32XX
  445. bool "NXP LPC32XX"
  446. select CLKSRC_MMIO
  447. select CPU_ARM926T
  448. select ARCH_REQUIRE_GPIOLIB
  449. select HAVE_IDE
  450. select ARM_AMBA
  451. select USB_ARCH_HAS_OHCI
  452. select CLKDEV_LOOKUP
  453. select GENERIC_TIME
  454. select GENERIC_CLOCKEVENTS
  455. help
  456. Support for the NXP LPC32XX family of processors
  457. config ARCH_MV78XX0
  458. bool "Marvell MV78xx0"
  459. select CPU_FEROCEON
  460. select PCI
  461. select ARCH_REQUIRE_GPIOLIB
  462. select GENERIC_CLOCKEVENTS
  463. select PLAT_ORION
  464. help
  465. Support for the following Marvell MV78xx0 series SoCs:
  466. MV781x0, MV782x0.
  467. config ARCH_ORION5X
  468. bool "Marvell Orion"
  469. depends on MMU
  470. select CPU_FEROCEON
  471. select PCI
  472. select ARCH_REQUIRE_GPIOLIB
  473. select GENERIC_CLOCKEVENTS
  474. select PLAT_ORION
  475. help
  476. Support for the following Marvell Orion 5x series SoCs:
  477. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  478. Orion-2 (5281), Orion-1-90 (6183).
  479. config ARCH_MMP
  480. bool "Marvell PXA168/910/MMP2"
  481. depends on MMU
  482. select ARCH_REQUIRE_GPIOLIB
  483. select CLKDEV_LOOKUP
  484. select GENERIC_CLOCKEVENTS
  485. select HAVE_SCHED_CLOCK
  486. select TICK_ONESHOT
  487. select PLAT_PXA
  488. select SPARSE_IRQ
  489. help
  490. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  491. config ARCH_KS8695
  492. bool "Micrel/Kendin KS8695"
  493. select CPU_ARM922T
  494. select ARCH_REQUIRE_GPIOLIB
  495. select ARCH_USES_GETTIMEOFFSET
  496. help
  497. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  498. System-on-Chip devices.
  499. config ARCH_W90X900
  500. bool "Nuvoton W90X900 CPU"
  501. select CPU_ARM926T
  502. select ARCH_REQUIRE_GPIOLIB
  503. select CLKDEV_LOOKUP
  504. select CLKSRC_MMIO
  505. select GENERIC_CLOCKEVENTS
  506. help
  507. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  508. At present, the w90x900 has been renamed nuc900, regarding
  509. the ARM series product line, you can login the following
  510. link address to know more.
  511. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  512. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  513. config ARCH_NUC93X
  514. bool "Nuvoton NUC93X CPU"
  515. select CPU_ARM926T
  516. select CLKDEV_LOOKUP
  517. help
  518. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  519. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  520. config ARCH_TEGRA
  521. bool "NVIDIA Tegra"
  522. select CLKDEV_LOOKUP
  523. select CLKSRC_MMIO
  524. select GENERIC_TIME
  525. select GENERIC_CLOCKEVENTS
  526. select GENERIC_GPIO
  527. select HAVE_CLK
  528. select HAVE_SCHED_CLOCK
  529. select ARCH_HAS_CPUFREQ
  530. help
  531. This enables support for NVIDIA Tegra based systems (Tegra APX,
  532. Tegra 6xx and Tegra 2 series).
  533. config ARCH_PNX4008
  534. bool "Philips Nexperia PNX4008 Mobile"
  535. select CPU_ARM926T
  536. select CLKDEV_LOOKUP
  537. select ARCH_USES_GETTIMEOFFSET
  538. help
  539. This enables support for Philips PNX4008 mobile platform.
  540. config ARCH_PXA
  541. bool "PXA2xx/PXA3xx-based"
  542. depends on MMU
  543. select ARCH_MTD_XIP
  544. select ARCH_HAS_CPUFREQ
  545. select CLKDEV_LOOKUP
  546. select CLKSRC_MMIO
  547. select ARCH_REQUIRE_GPIOLIB
  548. select GENERIC_CLOCKEVENTS
  549. select HAVE_SCHED_CLOCK
  550. select TICK_ONESHOT
  551. select PLAT_PXA
  552. select SPARSE_IRQ
  553. select AUTO_ZRELADDR
  554. select MULTI_IRQ_HANDLER
  555. help
  556. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  557. config ARCH_MSM
  558. bool "Qualcomm MSM"
  559. select HAVE_CLK
  560. select GENERIC_CLOCKEVENTS
  561. select ARCH_REQUIRE_GPIOLIB
  562. select CLKDEV_LOOKUP
  563. help
  564. Support for Qualcomm MSM/QSD based systems. This runs on the
  565. apps processor of the MSM/QSD and depends on a shared memory
  566. interface to the modem processor which runs the baseband
  567. stack and controls some vital subsystems
  568. (clock and power control, etc).
  569. config ARCH_SHMOBILE
  570. bool "Renesas SH-Mobile / R-Mobile"
  571. select HAVE_CLK
  572. select CLKDEV_LOOKUP
  573. select HAVE_MACH_CLKDEV
  574. select GENERIC_CLOCKEVENTS
  575. select NO_IOPORT
  576. select SPARSE_IRQ
  577. select MULTI_IRQ_HANDLER
  578. select PM_GENERIC_DOMAINS if PM
  579. help
  580. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  581. config ARCH_RPC
  582. bool "RiscPC"
  583. select ARCH_ACORN
  584. select FIQ
  585. select TIMER_ACORN
  586. select ARCH_MAY_HAVE_PC_FDC
  587. select HAVE_PATA_PLATFORM
  588. select ISA_DMA_API
  589. select NO_IOPORT
  590. select ARCH_SPARSEMEM_ENABLE
  591. select ARCH_USES_GETTIMEOFFSET
  592. help
  593. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  594. CD-ROM interface, serial and parallel port, and the floppy drive.
  595. config ARCH_SA1100
  596. bool "SA1100-based"
  597. select CLKSRC_MMIO
  598. select CPU_SA1100
  599. select ISA
  600. select ARCH_SPARSEMEM_ENABLE
  601. select ARCH_MTD_XIP
  602. select ARCH_HAS_CPUFREQ
  603. select CPU_FREQ
  604. select GENERIC_CLOCKEVENTS
  605. select HAVE_CLK
  606. select HAVE_SCHED_CLOCK
  607. select TICK_ONESHOT
  608. select ARCH_REQUIRE_GPIOLIB
  609. help
  610. Support for StrongARM 11x0 based boards.
  611. config ARCH_S3C2410
  612. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  613. select GENERIC_GPIO
  614. select ARCH_HAS_CPUFREQ
  615. select HAVE_CLK
  616. select CLKDEV_LOOKUP
  617. select ARCH_USES_GETTIMEOFFSET
  618. select HAVE_S3C2410_I2C if I2C
  619. help
  620. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  621. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  622. the Samsung SMDK2410 development board (and derivatives).
  623. Note, the S3C2416 and the S3C2450 are so close that they even share
  624. the same SoC ID code. This means that there is no separate machine
  625. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  626. config ARCH_S3C64XX
  627. bool "Samsung S3C64XX"
  628. select PLAT_SAMSUNG
  629. select CPU_V6
  630. select ARM_VIC
  631. select HAVE_CLK
  632. select CLKDEV_LOOKUP
  633. select NO_IOPORT
  634. select ARCH_USES_GETTIMEOFFSET
  635. select ARCH_HAS_CPUFREQ
  636. select ARCH_REQUIRE_GPIOLIB
  637. select SAMSUNG_CLKSRC
  638. select SAMSUNG_IRQ_VIC_TIMER
  639. select SAMSUNG_IRQ_UART
  640. select S3C_GPIO_TRACK
  641. select S3C_GPIO_PULL_UPDOWN
  642. select S3C_GPIO_CFG_S3C24XX
  643. select S3C_GPIO_CFG_S3C64XX
  644. select S3C_DEV_NAND
  645. select USB_ARCH_HAS_OHCI
  646. select SAMSUNG_GPIOLIB_4BIT
  647. select HAVE_S3C2410_I2C if I2C
  648. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  649. help
  650. Samsung S3C64XX series based systems
  651. config ARCH_S5P64X0
  652. bool "Samsung S5P6440 S5P6450"
  653. select CPU_V6
  654. select GENERIC_GPIO
  655. select HAVE_CLK
  656. select CLKDEV_LOOKUP
  657. select CLKSRC_MMIO
  658. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  659. select GENERIC_CLOCKEVENTS
  660. select HAVE_SCHED_CLOCK
  661. select HAVE_S3C2410_I2C if I2C
  662. select HAVE_S3C_RTC if RTC_CLASS
  663. help
  664. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  665. SMDK6450.
  666. config ARCH_S5PC100
  667. bool "Samsung S5PC100"
  668. select GENERIC_GPIO
  669. select HAVE_CLK
  670. select CLKDEV_LOOKUP
  671. select CPU_V7
  672. select ARM_L1_CACHE_SHIFT_6
  673. select ARCH_USES_GETTIMEOFFSET
  674. select HAVE_S3C2410_I2C if I2C
  675. select HAVE_S3C_RTC if RTC_CLASS
  676. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  677. help
  678. Samsung S5PC100 series based systems
  679. config ARCH_S5PV210
  680. bool "Samsung S5PV210/S5PC110"
  681. select CPU_V7
  682. select ARCH_SPARSEMEM_ENABLE
  683. select ARCH_HAS_HOLES_MEMORYMODEL
  684. select GENERIC_GPIO
  685. select HAVE_CLK
  686. select CLKDEV_LOOKUP
  687. select CLKSRC_MMIO
  688. select ARM_L1_CACHE_SHIFT_6
  689. select ARCH_HAS_CPUFREQ
  690. select GENERIC_CLOCKEVENTS
  691. select HAVE_SCHED_CLOCK
  692. select HAVE_S3C2410_I2C if I2C
  693. select HAVE_S3C_RTC if RTC_CLASS
  694. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  695. help
  696. Samsung S5PV210/S5PC110 series based systems
  697. config ARCH_EXYNOS4
  698. bool "Samsung EXYNOS4"
  699. select CPU_V7
  700. select ARCH_SPARSEMEM_ENABLE
  701. select ARCH_HAS_HOLES_MEMORYMODEL
  702. select GENERIC_GPIO
  703. select HAVE_CLK
  704. select CLKDEV_LOOKUP
  705. select ARCH_HAS_CPUFREQ
  706. select GENERIC_CLOCKEVENTS
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. select HAVE_S3C2410_I2C if I2C
  709. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  710. help
  711. Samsung EXYNOS4 series based systems
  712. config ARCH_SHARK
  713. bool "Shark"
  714. select CPU_SA110
  715. select ISA
  716. select ISA_DMA
  717. select ZONE_DMA
  718. select PCI
  719. select ARCH_USES_GETTIMEOFFSET
  720. help
  721. Support for the StrongARM based Digital DNARD machine, also known
  722. as "Shark" (<http://www.shark-linux.de/shark.html>).
  723. config ARCH_TCC_926
  724. bool "Telechips TCC ARM926-based systems"
  725. select CLKSRC_MMIO
  726. select CPU_ARM926T
  727. select HAVE_CLK
  728. select CLKDEV_LOOKUP
  729. select GENERIC_CLOCKEVENTS
  730. help
  731. Support for Telechips TCC ARM926-based systems.
  732. config ARCH_U300
  733. bool "ST-Ericsson U300 Series"
  734. depends on MMU
  735. select CLKSRC_MMIO
  736. select CPU_ARM926T
  737. select HAVE_SCHED_CLOCK
  738. select HAVE_TCM
  739. select ARM_AMBA
  740. select ARM_VIC
  741. select GENERIC_CLOCKEVENTS
  742. select CLKDEV_LOOKUP
  743. select HAVE_MACH_CLKDEV
  744. select GENERIC_GPIO
  745. help
  746. Support for ST-Ericsson U300 series mobile platforms.
  747. config ARCH_U8500
  748. bool "ST-Ericsson U8500 Series"
  749. select CPU_V7
  750. select ARM_AMBA
  751. select GENERIC_CLOCKEVENTS
  752. select CLKDEV_LOOKUP
  753. select ARCH_REQUIRE_GPIOLIB
  754. select ARCH_HAS_CPUFREQ
  755. help
  756. Support for ST-Ericsson's Ux500 architecture
  757. config ARCH_NOMADIK
  758. bool "STMicroelectronics Nomadik"
  759. select ARM_AMBA
  760. select ARM_VIC
  761. select CPU_ARM926T
  762. select CLKDEV_LOOKUP
  763. select GENERIC_CLOCKEVENTS
  764. select ARCH_REQUIRE_GPIOLIB
  765. help
  766. Support for the Nomadik platform by ST-Ericsson
  767. config ARCH_DAVINCI
  768. bool "TI DaVinci"
  769. select GENERIC_CLOCKEVENTS
  770. select ARCH_REQUIRE_GPIOLIB
  771. select ZONE_DMA
  772. select HAVE_IDE
  773. select CLKDEV_LOOKUP
  774. select GENERIC_ALLOCATOR
  775. select GENERIC_IRQ_CHIP
  776. select ARCH_HAS_HOLES_MEMORYMODEL
  777. help
  778. Support for TI's DaVinci platform.
  779. config ARCH_OMAP
  780. bool "TI OMAP"
  781. select HAVE_CLK
  782. select ARCH_REQUIRE_GPIOLIB
  783. select ARCH_HAS_CPUFREQ
  784. select CLKSRC_MMIO
  785. select GENERIC_CLOCKEVENTS
  786. select HAVE_SCHED_CLOCK
  787. select ARCH_HAS_HOLES_MEMORYMODEL
  788. help
  789. Support for TI's OMAP platform (OMAP1/2/3/4).
  790. config PLAT_SPEAR
  791. bool "ST SPEAr"
  792. select ARM_AMBA
  793. select ARCH_REQUIRE_GPIOLIB
  794. select CLKDEV_LOOKUP
  795. select CLKSRC_MMIO
  796. select GENERIC_CLOCKEVENTS
  797. select HAVE_CLK
  798. help
  799. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  800. config ARCH_VT8500
  801. bool "VIA/WonderMedia 85xx"
  802. select CPU_ARM926T
  803. select GENERIC_GPIO
  804. select ARCH_HAS_CPUFREQ
  805. select GENERIC_CLOCKEVENTS
  806. select ARCH_REQUIRE_GPIOLIB
  807. select HAVE_PWM
  808. help
  809. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  810. config ARCH_ZYNQ
  811. bool "Xilinx Zynq ARM Cortex A9 Platform"
  812. select CPU_V7
  813. select GENERIC_TIME
  814. select GENERIC_CLOCKEVENTS
  815. select CLKDEV_LOOKUP
  816. select ARM_GIC
  817. select ARM_AMBA
  818. select ICST
  819. select USE_OF
  820. help
  821. Support for Xilinx Zynq ARM Cortex A9 Platform
  822. endchoice
  823. #
  824. # This is sorted alphabetically by mach-* pathname. However, plat-*
  825. # Kconfigs may be included either alphabetically (according to the
  826. # plat- suffix) or along side the corresponding mach-* source.
  827. #
  828. source "arch/arm/mach-at91/Kconfig"
  829. source "arch/arm/mach-bcmring/Kconfig"
  830. source "arch/arm/mach-clps711x/Kconfig"
  831. source "arch/arm/mach-cns3xxx/Kconfig"
  832. source "arch/arm/mach-davinci/Kconfig"
  833. source "arch/arm/mach-dove/Kconfig"
  834. source "arch/arm/mach-ep93xx/Kconfig"
  835. source "arch/arm/mach-footbridge/Kconfig"
  836. source "arch/arm/mach-gemini/Kconfig"
  837. source "arch/arm/mach-h720x/Kconfig"
  838. source "arch/arm/mach-integrator/Kconfig"
  839. source "arch/arm/mach-iop32x/Kconfig"
  840. source "arch/arm/mach-iop33x/Kconfig"
  841. source "arch/arm/mach-iop13xx/Kconfig"
  842. source "arch/arm/mach-ixp4xx/Kconfig"
  843. source "arch/arm/mach-ixp2000/Kconfig"
  844. source "arch/arm/mach-ixp23xx/Kconfig"
  845. source "arch/arm/mach-kirkwood/Kconfig"
  846. source "arch/arm/mach-ks8695/Kconfig"
  847. source "arch/arm/mach-lpc32xx/Kconfig"
  848. source "arch/arm/mach-msm/Kconfig"
  849. source "arch/arm/mach-mv78xx0/Kconfig"
  850. source "arch/arm/plat-mxc/Kconfig"
  851. source "arch/arm/mach-mxs/Kconfig"
  852. source "arch/arm/mach-netx/Kconfig"
  853. source "arch/arm/mach-nomadik/Kconfig"
  854. source "arch/arm/plat-nomadik/Kconfig"
  855. source "arch/arm/mach-nuc93x/Kconfig"
  856. source "arch/arm/plat-omap/Kconfig"
  857. source "arch/arm/mach-omap1/Kconfig"
  858. source "arch/arm/mach-omap2/Kconfig"
  859. source "arch/arm/mach-orion5x/Kconfig"
  860. source "arch/arm/mach-pxa/Kconfig"
  861. source "arch/arm/plat-pxa/Kconfig"
  862. source "arch/arm/mach-mmp/Kconfig"
  863. source "arch/arm/mach-realview/Kconfig"
  864. source "arch/arm/mach-sa1100/Kconfig"
  865. source "arch/arm/plat-samsung/Kconfig"
  866. source "arch/arm/plat-s3c24xx/Kconfig"
  867. source "arch/arm/plat-s5p/Kconfig"
  868. source "arch/arm/plat-spear/Kconfig"
  869. source "arch/arm/plat-tcc/Kconfig"
  870. if ARCH_S3C2410
  871. source "arch/arm/mach-s3c2410/Kconfig"
  872. source "arch/arm/mach-s3c2412/Kconfig"
  873. source "arch/arm/mach-s3c2416/Kconfig"
  874. source "arch/arm/mach-s3c2440/Kconfig"
  875. source "arch/arm/mach-s3c2443/Kconfig"
  876. endif
  877. if ARCH_S3C64XX
  878. source "arch/arm/mach-s3c64xx/Kconfig"
  879. endif
  880. source "arch/arm/mach-s5p64x0/Kconfig"
  881. source "arch/arm/mach-s5pc100/Kconfig"
  882. source "arch/arm/mach-s5pv210/Kconfig"
  883. source "arch/arm/mach-exynos4/Kconfig"
  884. source "arch/arm/mach-shmobile/Kconfig"
  885. source "arch/arm/mach-tegra/Kconfig"
  886. source "arch/arm/mach-u300/Kconfig"
  887. source "arch/arm/mach-ux500/Kconfig"
  888. source "arch/arm/mach-versatile/Kconfig"
  889. source "arch/arm/mach-vexpress/Kconfig"
  890. source "arch/arm/plat-versatile/Kconfig"
  891. source "arch/arm/mach-vt8500/Kconfig"
  892. source "arch/arm/mach-w90x900/Kconfig"
  893. # Definitions to make life easier
  894. config ARCH_ACORN
  895. bool
  896. config PLAT_IOP
  897. bool
  898. select GENERIC_CLOCKEVENTS
  899. select HAVE_SCHED_CLOCK
  900. config PLAT_ORION
  901. bool
  902. select CLKSRC_MMIO
  903. select GENERIC_IRQ_CHIP
  904. select HAVE_SCHED_CLOCK
  905. config PLAT_PXA
  906. bool
  907. config PLAT_VERSATILE
  908. bool
  909. config ARM_TIMER_SP804
  910. bool
  911. select CLKSRC_MMIO
  912. source arch/arm/mm/Kconfig
  913. config IWMMXT
  914. bool "Enable iWMMXt support"
  915. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  916. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  917. help
  918. Enable support for iWMMXt context switching at run time if
  919. running on a CPU that supports it.
  920. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  921. config XSCALE_PMU
  922. bool
  923. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  924. default y
  925. config CPU_HAS_PMU
  926. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  927. (!ARCH_OMAP3 || OMAP3_EMU)
  928. default y
  929. bool
  930. config MULTI_IRQ_HANDLER
  931. bool
  932. help
  933. Allow each machine to specify it's own IRQ handler at run time.
  934. if !MMU
  935. source "arch/arm/Kconfig-nommu"
  936. endif
  937. config ARM_ERRATA_411920
  938. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  939. depends on CPU_V6 || CPU_V6K
  940. help
  941. Invalidation of the Instruction Cache operation can
  942. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  943. It does not affect the MPCore. This option enables the ARM Ltd.
  944. recommended workaround.
  945. config ARM_ERRATA_430973
  946. bool "ARM errata: Stale prediction on replaced interworking branch"
  947. depends on CPU_V7
  948. help
  949. This option enables the workaround for the 430973 Cortex-A8
  950. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  951. interworking branch is replaced with another code sequence at the
  952. same virtual address, whether due to self-modifying code or virtual
  953. to physical address re-mapping, Cortex-A8 does not recover from the
  954. stale interworking branch prediction. This results in Cortex-A8
  955. executing the new code sequence in the incorrect ARM or Thumb state.
  956. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  957. and also flushes the branch target cache at every context switch.
  958. Note that setting specific bits in the ACTLR register may not be
  959. available in non-secure mode.
  960. config ARM_ERRATA_458693
  961. bool "ARM errata: Processor deadlock when a false hazard is created"
  962. depends on CPU_V7
  963. help
  964. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  965. erratum. For very specific sequences of memory operations, it is
  966. possible for a hazard condition intended for a cache line to instead
  967. be incorrectly associated with a different cache line. This false
  968. hazard might then cause a processor deadlock. The workaround enables
  969. the L1 caching of the NEON accesses and disables the PLD instruction
  970. in the ACTLR register. Note that setting specific bits in the ACTLR
  971. register may not be available in non-secure mode.
  972. config ARM_ERRATA_460075
  973. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  974. depends on CPU_V7
  975. help
  976. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  977. erratum. Any asynchronous access to the L2 cache may encounter a
  978. situation in which recent store transactions to the L2 cache are lost
  979. and overwritten with stale memory contents from external memory. The
  980. workaround disables the write-allocate mode for the L2 cache via the
  981. ACTLR register. Note that setting specific bits in the ACTLR register
  982. may not be available in non-secure mode.
  983. config ARM_ERRATA_742230
  984. bool "ARM errata: DMB operation may be faulty"
  985. depends on CPU_V7 && SMP
  986. help
  987. This option enables the workaround for the 742230 Cortex-A9
  988. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  989. between two write operations may not ensure the correct visibility
  990. ordering of the two writes. This workaround sets a specific bit in
  991. the diagnostic register of the Cortex-A9 which causes the DMB
  992. instruction to behave as a DSB, ensuring the correct behaviour of
  993. the two writes.
  994. config ARM_ERRATA_742231
  995. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  996. depends on CPU_V7 && SMP
  997. help
  998. This option enables the workaround for the 742231 Cortex-A9
  999. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1000. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1001. accessing some data located in the same cache line, may get corrupted
  1002. data due to bad handling of the address hazard when the line gets
  1003. replaced from one of the CPUs at the same time as another CPU is
  1004. accessing it. This workaround sets specific bits in the diagnostic
  1005. register of the Cortex-A9 which reduces the linefill issuing
  1006. capabilities of the processor.
  1007. config PL310_ERRATA_588369
  1008. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1009. depends on CACHE_L2X0
  1010. help
  1011. The PL310 L2 cache controller implements three types of Clean &
  1012. Invalidate maintenance operations: by Physical Address
  1013. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1014. They are architecturally defined to behave as the execution of a
  1015. clean operation followed immediately by an invalidate operation,
  1016. both performing to the same memory location. This functionality
  1017. is not correctly implemented in PL310 as clean lines are not
  1018. invalidated as a result of these operations.
  1019. config ARM_ERRATA_720789
  1020. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1021. depends on CPU_V7 && SMP
  1022. help
  1023. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1024. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1025. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1026. As a consequence of this erratum, some TLB entries which should be
  1027. invalidated are not, resulting in an incoherency in the system page
  1028. tables. The workaround changes the TLB flushing routines to invalidate
  1029. entries regardless of the ASID.
  1030. config PL310_ERRATA_727915
  1031. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1032. depends on CACHE_L2X0
  1033. help
  1034. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1035. operation (offset 0x7FC). This operation runs in background so that
  1036. PL310 can handle normal accesses while it is in progress. Under very
  1037. rare circumstances, due to this erratum, write data can be lost when
  1038. PL310 treats a cacheable write transaction during a Clean &
  1039. Invalidate by Way operation.
  1040. config ARM_ERRATA_743622
  1041. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1042. depends on CPU_V7
  1043. help
  1044. This option enables the workaround for the 743622 Cortex-A9
  1045. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1046. optimisation in the Cortex-A9 Store Buffer may lead to data
  1047. corruption. This workaround sets a specific bit in the diagnostic
  1048. register of the Cortex-A9 which disables the Store Buffer
  1049. optimisation, preventing the defect from occurring. This has no
  1050. visible impact on the overall performance or power consumption of the
  1051. processor.
  1052. config ARM_ERRATA_751472
  1053. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1054. depends on CPU_V7 && SMP
  1055. help
  1056. This option enables the workaround for the 751472 Cortex-A9 (prior
  1057. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1058. completion of a following broadcasted operation if the second
  1059. operation is received by a CPU before the ICIALLUIS has completed,
  1060. potentially leading to corrupted entries in the cache or TLB.
  1061. config ARM_ERRATA_753970
  1062. bool "ARM errata: cache sync operation may be faulty"
  1063. depends on CACHE_PL310
  1064. help
  1065. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1066. Under some condition the effect of cache sync operation on
  1067. the store buffer still remains when the operation completes.
  1068. This means that the store buffer is always asked to drain and
  1069. this prevents it from merging any further writes. The workaround
  1070. is to replace the normal offset of cache sync operation (0x730)
  1071. by another offset targeting an unmapped PL310 register 0x740.
  1072. This has the same effect as the cache sync operation: store buffer
  1073. drain and waiting for all buffers empty.
  1074. config ARM_ERRATA_754322
  1075. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1076. depends on CPU_V7
  1077. help
  1078. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1079. r3p*) erratum. A speculative memory access may cause a page table walk
  1080. which starts prior to an ASID switch but completes afterwards. This
  1081. can populate the micro-TLB with a stale entry which may be hit with
  1082. the new ASID. This workaround places two dsb instructions in the mm
  1083. switching code so that no page table walks can cross the ASID switch.
  1084. config ARM_ERRATA_754327
  1085. bool "ARM errata: no automatic Store Buffer drain"
  1086. depends on CPU_V7 && SMP
  1087. help
  1088. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1089. r2p0) erratum. The Store Buffer does not have any automatic draining
  1090. mechanism and therefore a livelock may occur if an external agent
  1091. continuously polls a memory location waiting to observe an update.
  1092. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1093. written polling loops from denying visibility of updates to memory.
  1094. endmenu
  1095. source "arch/arm/common/Kconfig"
  1096. menu "Bus support"
  1097. config ARM_AMBA
  1098. bool
  1099. config ISA
  1100. bool
  1101. help
  1102. Find out whether you have ISA slots on your motherboard. ISA is the
  1103. name of a bus system, i.e. the way the CPU talks to the other stuff
  1104. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1105. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1106. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1107. # Select ISA DMA controller support
  1108. config ISA_DMA
  1109. bool
  1110. select ISA_DMA_API
  1111. # Select ISA DMA interface
  1112. config ISA_DMA_API
  1113. bool
  1114. config PCI
  1115. bool "PCI support" if MIGHT_HAVE_PCI
  1116. help
  1117. Find out whether you have a PCI motherboard. PCI is the name of a
  1118. bus system, i.e. the way the CPU talks to the other stuff inside
  1119. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1120. VESA. If you have PCI, say Y, otherwise N.
  1121. config PCI_DOMAINS
  1122. bool
  1123. depends on PCI
  1124. config PCI_NANOENGINE
  1125. bool "BSE nanoEngine PCI support"
  1126. depends on SA1100_NANOENGINE
  1127. help
  1128. Enable PCI on the BSE nanoEngine board.
  1129. config PCI_SYSCALL
  1130. def_bool PCI
  1131. # Select the host bridge type
  1132. config PCI_HOST_VIA82C505
  1133. bool
  1134. depends on PCI && ARCH_SHARK
  1135. default y
  1136. config PCI_HOST_ITE8152
  1137. bool
  1138. depends on PCI && MACH_ARMCORE
  1139. default y
  1140. select DMABOUNCE
  1141. source "drivers/pci/Kconfig"
  1142. source "drivers/pcmcia/Kconfig"
  1143. endmenu
  1144. menu "Kernel Features"
  1145. source "kernel/time/Kconfig"
  1146. config SMP
  1147. bool "Symmetric Multi-Processing"
  1148. depends on CPU_V6K || CPU_V7
  1149. depends on GENERIC_CLOCKEVENTS
  1150. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1151. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1152. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1153. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1154. select USE_GENERIC_SMP_HELPERS
  1155. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1156. help
  1157. This enables support for systems with more than one CPU. If you have
  1158. a system with only one CPU, like most personal computers, say N. If
  1159. you have a system with more than one CPU, say Y.
  1160. If you say N here, the kernel will run on single and multiprocessor
  1161. machines, but will use only one CPU of a multiprocessor machine. If
  1162. you say Y here, the kernel will run on many, but not all, single
  1163. processor machines. On a single processor machine, the kernel will
  1164. run faster if you say N here.
  1165. See also <file:Documentation/i386/IO-APIC.txt>,
  1166. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1167. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1168. If you don't know what to do here, say N.
  1169. config SMP_ON_UP
  1170. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1171. depends on EXPERIMENTAL
  1172. depends on SMP && !XIP_KERNEL
  1173. default y
  1174. help
  1175. SMP kernels contain instructions which fail on non-SMP processors.
  1176. Enabling this option allows the kernel to modify itself to make
  1177. these instructions safe. Disabling it allows about 1K of space
  1178. savings.
  1179. If you don't know what to do here, say Y.
  1180. config HAVE_ARM_SCU
  1181. bool
  1182. help
  1183. This option enables support for the ARM system coherency unit
  1184. config HAVE_ARM_TWD
  1185. bool
  1186. depends on SMP
  1187. select TICK_ONESHOT
  1188. help
  1189. This options enables support for the ARM timer and watchdog unit
  1190. choice
  1191. prompt "Memory split"
  1192. default VMSPLIT_3G
  1193. help
  1194. Select the desired split between kernel and user memory.
  1195. If you are not absolutely sure what you are doing, leave this
  1196. option alone!
  1197. config VMSPLIT_3G
  1198. bool "3G/1G user/kernel split"
  1199. config VMSPLIT_2G
  1200. bool "2G/2G user/kernel split"
  1201. config VMSPLIT_1G
  1202. bool "1G/3G user/kernel split"
  1203. endchoice
  1204. config PAGE_OFFSET
  1205. hex
  1206. default 0x40000000 if VMSPLIT_1G
  1207. default 0x80000000 if VMSPLIT_2G
  1208. default 0xC0000000
  1209. config NR_CPUS
  1210. int "Maximum number of CPUs (2-32)"
  1211. range 2 32
  1212. depends on SMP
  1213. default "4"
  1214. config HOTPLUG_CPU
  1215. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1216. depends on SMP && HOTPLUG && EXPERIMENTAL
  1217. help
  1218. Say Y here to experiment with turning CPUs off and on. CPUs
  1219. can be controlled through /sys/devices/system/cpu.
  1220. config LOCAL_TIMERS
  1221. bool "Use local timer interrupts"
  1222. depends on SMP
  1223. default y
  1224. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1225. help
  1226. Enable support for local timers on SMP platforms, rather then the
  1227. legacy IPI broadcast method. Local timers allows the system
  1228. accounting to be spread across the timer interval, preventing a
  1229. "thundering herd" at every timer tick.
  1230. source kernel/Kconfig.preempt
  1231. config HZ
  1232. int
  1233. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1234. ARCH_S5PV210 || ARCH_EXYNOS4
  1235. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1236. default AT91_TIMER_HZ if ARCH_AT91
  1237. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1238. default 100
  1239. config THUMB2_KERNEL
  1240. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1241. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1242. select AEABI
  1243. select ARM_ASM_UNIFIED
  1244. help
  1245. By enabling this option, the kernel will be compiled in
  1246. Thumb-2 mode. A compiler/assembler that understand the unified
  1247. ARM-Thumb syntax is needed.
  1248. If unsure, say N.
  1249. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1250. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1251. depends on THUMB2_KERNEL && MODULES
  1252. default y
  1253. help
  1254. Various binutils versions can resolve Thumb-2 branches to
  1255. locally-defined, preemptible global symbols as short-range "b.n"
  1256. branch instructions.
  1257. This is a problem, because there's no guarantee the final
  1258. destination of the symbol, or any candidate locations for a
  1259. trampoline, are within range of the branch. For this reason, the
  1260. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1261. relocation in modules at all, and it makes little sense to add
  1262. support.
  1263. The symptom is that the kernel fails with an "unsupported
  1264. relocation" error when loading some modules.
  1265. Until fixed tools are available, passing
  1266. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1267. code which hits this problem, at the cost of a bit of extra runtime
  1268. stack usage in some cases.
  1269. The problem is described in more detail at:
  1270. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1271. Only Thumb-2 kernels are affected.
  1272. Unless you are sure your tools don't have this problem, say Y.
  1273. config ARM_ASM_UNIFIED
  1274. bool
  1275. config AEABI
  1276. bool "Use the ARM EABI to compile the kernel"
  1277. help
  1278. This option allows for the kernel to be compiled using the latest
  1279. ARM ABI (aka EABI). This is only useful if you are using a user
  1280. space environment that is also compiled with EABI.
  1281. Since there are major incompatibilities between the legacy ABI and
  1282. EABI, especially with regard to structure member alignment, this
  1283. option also changes the kernel syscall calling convention to
  1284. disambiguate both ABIs and allow for backward compatibility support
  1285. (selected with CONFIG_OABI_COMPAT).
  1286. To use this you need GCC version 4.0.0 or later.
  1287. config OABI_COMPAT
  1288. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1289. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1290. default y
  1291. help
  1292. This option preserves the old syscall interface along with the
  1293. new (ARM EABI) one. It also provides a compatibility layer to
  1294. intercept syscalls that have structure arguments which layout
  1295. in memory differs between the legacy ABI and the new ARM EABI
  1296. (only for non "thumb" binaries). This option adds a tiny
  1297. overhead to all syscalls and produces a slightly larger kernel.
  1298. If you know you'll be using only pure EABI user space then you
  1299. can say N here. If this option is not selected and you attempt
  1300. to execute a legacy ABI binary then the result will be
  1301. UNPREDICTABLE (in fact it can be predicted that it won't work
  1302. at all). If in doubt say Y.
  1303. config ARCH_HAS_HOLES_MEMORYMODEL
  1304. bool
  1305. config ARCH_SPARSEMEM_ENABLE
  1306. bool
  1307. config ARCH_SPARSEMEM_DEFAULT
  1308. def_bool ARCH_SPARSEMEM_ENABLE
  1309. config ARCH_SELECT_MEMORY_MODEL
  1310. def_bool ARCH_SPARSEMEM_ENABLE
  1311. config HAVE_ARCH_PFN_VALID
  1312. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1313. config HIGHMEM
  1314. bool "High Memory Support"
  1315. depends on MMU
  1316. help
  1317. The address space of ARM processors is only 4 Gigabytes large
  1318. and it has to accommodate user address space, kernel address
  1319. space as well as some memory mapped IO. That means that, if you
  1320. have a large amount of physical memory and/or IO, not all of the
  1321. memory can be "permanently mapped" by the kernel. The physical
  1322. memory that is not permanently mapped is called "high memory".
  1323. Depending on the selected kernel/user memory split, minimum
  1324. vmalloc space and actual amount of RAM, you may not need this
  1325. option which should result in a slightly faster kernel.
  1326. If unsure, say n.
  1327. config HIGHPTE
  1328. bool "Allocate 2nd-level pagetables from highmem"
  1329. depends on HIGHMEM
  1330. config HW_PERF_EVENTS
  1331. bool "Enable hardware performance counter support for perf events"
  1332. depends on PERF_EVENTS && CPU_HAS_PMU
  1333. default y
  1334. help
  1335. Enable hardware performance counter support for perf events. If
  1336. disabled, perf events will use software events only.
  1337. source "mm/Kconfig"
  1338. config FORCE_MAX_ZONEORDER
  1339. int "Maximum zone order" if ARCH_SHMOBILE
  1340. range 11 64 if ARCH_SHMOBILE
  1341. default "9" if SA1111
  1342. default "11"
  1343. help
  1344. The kernel memory allocator divides physically contiguous memory
  1345. blocks into "zones", where each zone is a power of two number of
  1346. pages. This option selects the largest power of two that the kernel
  1347. keeps in the memory allocator. If you need to allocate very large
  1348. blocks of physically contiguous memory, then you may need to
  1349. increase this value.
  1350. This config option is actually maximum order plus one. For example,
  1351. a value of 11 means that the largest free memory block is 2^10 pages.
  1352. config LEDS
  1353. bool "Timer and CPU usage LEDs"
  1354. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1355. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1356. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1357. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1358. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1359. ARCH_AT91 || ARCH_DAVINCI || \
  1360. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1361. help
  1362. If you say Y here, the LEDs on your machine will be used
  1363. to provide useful information about your current system status.
  1364. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1365. be able to select which LEDs are active using the options below. If
  1366. you are compiling a kernel for the EBSA-110 or the LART however, the
  1367. red LED will simply flash regularly to indicate that the system is
  1368. still functional. It is safe to say Y here if you have a CATS
  1369. system, but the driver will do nothing.
  1370. config LEDS_TIMER
  1371. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1372. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1373. || MACH_OMAP_PERSEUS2
  1374. depends on LEDS
  1375. depends on !GENERIC_CLOCKEVENTS
  1376. default y if ARCH_EBSA110
  1377. help
  1378. If you say Y here, one of the system LEDs (the green one on the
  1379. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1380. will flash regularly to indicate that the system is still
  1381. operational. This is mainly useful to kernel hackers who are
  1382. debugging unstable kernels.
  1383. The LART uses the same LED for both Timer LED and CPU usage LED
  1384. functions. You may choose to use both, but the Timer LED function
  1385. will overrule the CPU usage LED.
  1386. config LEDS_CPU
  1387. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1388. !ARCH_OMAP) \
  1389. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1390. || MACH_OMAP_PERSEUS2
  1391. depends on LEDS
  1392. help
  1393. If you say Y here, the red LED will be used to give a good real
  1394. time indication of CPU usage, by lighting whenever the idle task
  1395. is not currently executing.
  1396. The LART uses the same LED for both Timer LED and CPU usage LED
  1397. functions. You may choose to use both, but the Timer LED function
  1398. will overrule the CPU usage LED.
  1399. config ALIGNMENT_TRAP
  1400. bool
  1401. depends on CPU_CP15_MMU
  1402. default y if !ARCH_EBSA110
  1403. select HAVE_PROC_CPU if PROC_FS
  1404. help
  1405. ARM processors cannot fetch/store information which is not
  1406. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1407. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1408. fetch/store instructions will be emulated in software if you say
  1409. here, which has a severe performance impact. This is necessary for
  1410. correct operation of some network protocols. With an IP-only
  1411. configuration it is safe to say N, otherwise say Y.
  1412. config UACCESS_WITH_MEMCPY
  1413. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1414. depends on MMU && EXPERIMENTAL
  1415. default y if CPU_FEROCEON
  1416. help
  1417. Implement faster copy_to_user and clear_user methods for CPU
  1418. cores where a 8-word STM instruction give significantly higher
  1419. memory write throughput than a sequence of individual 32bit stores.
  1420. A possible side effect is a slight increase in scheduling latency
  1421. between threads sharing the same address space if they invoke
  1422. such copy operations with large buffers.
  1423. However, if the CPU data cache is using a write-allocate mode,
  1424. this option is unlikely to provide any performance gain.
  1425. config SECCOMP
  1426. bool
  1427. prompt "Enable seccomp to safely compute untrusted bytecode"
  1428. ---help---
  1429. This kernel feature is useful for number crunching applications
  1430. that may need to compute untrusted bytecode during their
  1431. execution. By using pipes or other transports made available to
  1432. the process as file descriptors supporting the read/write
  1433. syscalls, it's possible to isolate those applications in
  1434. their own address space using seccomp. Once seccomp is
  1435. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1436. and the task is only allowed to execute a few safe syscalls
  1437. defined by each seccomp mode.
  1438. config CC_STACKPROTECTOR
  1439. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1440. depends on EXPERIMENTAL
  1441. help
  1442. This option turns on the -fstack-protector GCC feature. This
  1443. feature puts, at the beginning of functions, a canary value on
  1444. the stack just before the return address, and validates
  1445. the value just before actually returning. Stack based buffer
  1446. overflows (that need to overwrite this return address) now also
  1447. overwrite the canary, which gets detected and the attack is then
  1448. neutralized via a kernel panic.
  1449. This feature requires gcc version 4.2 or above.
  1450. config DEPRECATED_PARAM_STRUCT
  1451. bool "Provide old way to pass kernel parameters"
  1452. help
  1453. This was deprecated in 2001 and announced to live on for 5 years.
  1454. Some old boot loaders still use this way.
  1455. endmenu
  1456. menu "Boot options"
  1457. config USE_OF
  1458. bool "Flattened Device Tree support"
  1459. select OF
  1460. select OF_EARLY_FLATTREE
  1461. select IRQ_DOMAIN
  1462. help
  1463. Include support for flattened device tree machine descriptions.
  1464. # Compressed boot loader in ROM. Yes, we really want to ask about
  1465. # TEXT and BSS so we preserve their values in the config files.
  1466. config ZBOOT_ROM_TEXT
  1467. hex "Compressed ROM boot loader base address"
  1468. default "0"
  1469. help
  1470. The physical address at which the ROM-able zImage is to be
  1471. placed in the target. Platforms which normally make use of
  1472. ROM-able zImage formats normally set this to a suitable
  1473. value in their defconfig file.
  1474. If ZBOOT_ROM is not enabled, this has no effect.
  1475. config ZBOOT_ROM_BSS
  1476. hex "Compressed ROM boot loader BSS address"
  1477. default "0"
  1478. help
  1479. The base address of an area of read/write memory in the target
  1480. for the ROM-able zImage which must be available while the
  1481. decompressor is running. It must be large enough to hold the
  1482. entire decompressed kernel plus an additional 128 KiB.
  1483. Platforms which normally make use of ROM-able zImage formats
  1484. normally set this to a suitable value in their defconfig file.
  1485. If ZBOOT_ROM is not enabled, this has no effect.
  1486. config ZBOOT_ROM
  1487. bool "Compressed boot loader in ROM/flash"
  1488. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1489. help
  1490. Say Y here if you intend to execute your compressed kernel image
  1491. (zImage) directly from ROM or flash. If unsure, say N.
  1492. choice
  1493. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1494. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1495. default ZBOOT_ROM_NONE
  1496. help
  1497. Include experimental SD/MMC loading code in the ROM-able zImage.
  1498. With this enabled it is possible to write the the ROM-able zImage
  1499. kernel image to an MMC or SD card and boot the kernel straight
  1500. from the reset vector. At reset the processor Mask ROM will load
  1501. the first part of the the ROM-able zImage which in turn loads the
  1502. rest the kernel image to RAM.
  1503. config ZBOOT_ROM_NONE
  1504. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1505. help
  1506. Do not load image from SD or MMC
  1507. config ZBOOT_ROM_MMCIF
  1508. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1509. help
  1510. Load image from MMCIF hardware block.
  1511. config ZBOOT_ROM_SH_MOBILE_SDHI
  1512. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1513. help
  1514. Load image from SDHI hardware block
  1515. endchoice
  1516. config CMDLINE
  1517. string "Default kernel command string"
  1518. default ""
  1519. help
  1520. On some architectures (EBSA110 and CATS), there is currently no way
  1521. for the boot loader to pass arguments to the kernel. For these
  1522. architectures, you should supply some command-line options at build
  1523. time by entering them here. As a minimum, you should specify the
  1524. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1525. choice
  1526. prompt "Kernel command line type" if CMDLINE != ""
  1527. default CMDLINE_FROM_BOOTLOADER
  1528. config CMDLINE_FROM_BOOTLOADER
  1529. bool "Use bootloader kernel arguments if available"
  1530. help
  1531. Uses the command-line options passed by the boot loader. If
  1532. the boot loader doesn't provide any, the default kernel command
  1533. string provided in CMDLINE will be used.
  1534. config CMDLINE_EXTEND
  1535. bool "Extend bootloader kernel arguments"
  1536. help
  1537. The command-line arguments provided by the boot loader will be
  1538. appended to the default kernel command string.
  1539. config CMDLINE_FORCE
  1540. bool "Always use the default kernel command string"
  1541. help
  1542. Always use the default kernel command string, even if the boot
  1543. loader passes other arguments to the kernel.
  1544. This is useful if you cannot or don't want to change the
  1545. command-line options your boot loader passes to the kernel.
  1546. endchoice
  1547. config XIP_KERNEL
  1548. bool "Kernel Execute-In-Place from ROM"
  1549. depends on !ZBOOT_ROM
  1550. help
  1551. Execute-In-Place allows the kernel to run from non-volatile storage
  1552. directly addressable by the CPU, such as NOR flash. This saves RAM
  1553. space since the text section of the kernel is not loaded from flash
  1554. to RAM. Read-write sections, such as the data section and stack,
  1555. are still copied to RAM. The XIP kernel is not compressed since
  1556. it has to run directly from flash, so it will take more space to
  1557. store it. The flash address used to link the kernel object files,
  1558. and for storing it, is configuration dependent. Therefore, if you
  1559. say Y here, you must know the proper physical address where to
  1560. store the kernel image depending on your own flash memory usage.
  1561. Also note that the make target becomes "make xipImage" rather than
  1562. "make zImage" or "make Image". The final kernel binary to put in
  1563. ROM memory will be arch/arm/boot/xipImage.
  1564. If unsure, say N.
  1565. config XIP_PHYS_ADDR
  1566. hex "XIP Kernel Physical Location"
  1567. depends on XIP_KERNEL
  1568. default "0x00080000"
  1569. help
  1570. This is the physical address in your flash memory the kernel will
  1571. be linked for and stored to. This address is dependent on your
  1572. own flash usage.
  1573. config KEXEC
  1574. bool "Kexec system call (EXPERIMENTAL)"
  1575. depends on EXPERIMENTAL
  1576. help
  1577. kexec is a system call that implements the ability to shutdown your
  1578. current kernel, and to start another kernel. It is like a reboot
  1579. but it is independent of the system firmware. And like a reboot
  1580. you can start any kernel with it, not just Linux.
  1581. It is an ongoing process to be certain the hardware in a machine
  1582. is properly shutdown, so do not be surprised if this code does not
  1583. initially work for you. It may help to enable device hotplugging
  1584. support.
  1585. config ATAGS_PROC
  1586. bool "Export atags in procfs"
  1587. depends on KEXEC
  1588. default y
  1589. help
  1590. Should the atags used to boot the kernel be exported in an "atags"
  1591. file in procfs. Useful with kexec.
  1592. config CRASH_DUMP
  1593. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1594. depends on EXPERIMENTAL
  1595. help
  1596. Generate crash dump after being started by kexec. This should
  1597. be normally only set in special crash dump kernels which are
  1598. loaded in the main kernel with kexec-tools into a specially
  1599. reserved region and then later executed after a crash by
  1600. kdump/kexec. The crash dump kernel must be compiled to a
  1601. memory address not used by the main kernel
  1602. For more details see Documentation/kdump/kdump.txt
  1603. config AUTO_ZRELADDR
  1604. bool "Auto calculation of the decompressed kernel image address"
  1605. depends on !ZBOOT_ROM && !ARCH_U300
  1606. help
  1607. ZRELADDR is the physical address where the decompressed kernel
  1608. image will be placed. If AUTO_ZRELADDR is selected, the address
  1609. will be determined at run-time by masking the current IP with
  1610. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1611. from start of memory.
  1612. endmenu
  1613. menu "CPU Power Management"
  1614. if ARCH_HAS_CPUFREQ
  1615. source "drivers/cpufreq/Kconfig"
  1616. config CPU_FREQ_IMX
  1617. tristate "CPUfreq driver for i.MX CPUs"
  1618. depends on ARCH_MXC && CPU_FREQ
  1619. help
  1620. This enables the CPUfreq driver for i.MX CPUs.
  1621. config CPU_FREQ_SA1100
  1622. bool
  1623. config CPU_FREQ_SA1110
  1624. bool
  1625. config CPU_FREQ_INTEGRATOR
  1626. tristate "CPUfreq driver for ARM Integrator CPUs"
  1627. depends on ARCH_INTEGRATOR && CPU_FREQ
  1628. default y
  1629. help
  1630. This enables the CPUfreq driver for ARM Integrator CPUs.
  1631. For details, take a look at <file:Documentation/cpu-freq>.
  1632. If in doubt, say Y.
  1633. config CPU_FREQ_PXA
  1634. bool
  1635. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1636. default y
  1637. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1638. config CPU_FREQ_S3C
  1639. bool
  1640. help
  1641. Internal configuration node for common cpufreq on Samsung SoC
  1642. config CPU_FREQ_S3C24XX
  1643. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1644. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1645. select CPU_FREQ_S3C
  1646. help
  1647. This enables the CPUfreq driver for the Samsung S3C24XX family
  1648. of CPUs.
  1649. For details, take a look at <file:Documentation/cpu-freq>.
  1650. If in doubt, say N.
  1651. config CPU_FREQ_S3C24XX_PLL
  1652. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1653. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1654. help
  1655. Compile in support for changing the PLL frequency from the
  1656. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1657. after a frequency change, so by default it is not enabled.
  1658. This also means that the PLL tables for the selected CPU(s) will
  1659. be built which may increase the size of the kernel image.
  1660. config CPU_FREQ_S3C24XX_DEBUG
  1661. bool "Debug CPUfreq Samsung driver core"
  1662. depends on CPU_FREQ_S3C24XX
  1663. help
  1664. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1665. config CPU_FREQ_S3C24XX_IODEBUG
  1666. bool "Debug CPUfreq Samsung driver IO timing"
  1667. depends on CPU_FREQ_S3C24XX
  1668. help
  1669. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1670. config CPU_FREQ_S3C24XX_DEBUGFS
  1671. bool "Export debugfs for CPUFreq"
  1672. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1673. help
  1674. Export status information via debugfs.
  1675. endif
  1676. source "drivers/cpuidle/Kconfig"
  1677. endmenu
  1678. menu "Floating point emulation"
  1679. comment "At least one emulation must be selected"
  1680. config FPE_NWFPE
  1681. bool "NWFPE math emulation"
  1682. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1683. ---help---
  1684. Say Y to include the NWFPE floating point emulator in the kernel.
  1685. This is necessary to run most binaries. Linux does not currently
  1686. support floating point hardware so you need to say Y here even if
  1687. your machine has an FPA or floating point co-processor podule.
  1688. You may say N here if you are going to load the Acorn FPEmulator
  1689. early in the bootup.
  1690. config FPE_NWFPE_XP
  1691. bool "Support extended precision"
  1692. depends on FPE_NWFPE
  1693. help
  1694. Say Y to include 80-bit support in the kernel floating-point
  1695. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1696. Note that gcc does not generate 80-bit operations by default,
  1697. so in most cases this option only enlarges the size of the
  1698. floating point emulator without any good reason.
  1699. You almost surely want to say N here.
  1700. config FPE_FASTFPE
  1701. bool "FastFPE math emulation (EXPERIMENTAL)"
  1702. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1703. ---help---
  1704. Say Y here to include the FAST floating point emulator in the kernel.
  1705. This is an experimental much faster emulator which now also has full
  1706. precision for the mantissa. It does not support any exceptions.
  1707. It is very simple, and approximately 3-6 times faster than NWFPE.
  1708. It should be sufficient for most programs. It may be not suitable
  1709. for scientific calculations, but you have to check this for yourself.
  1710. If you do not feel you need a faster FP emulation you should better
  1711. choose NWFPE.
  1712. config VFP
  1713. bool "VFP-format floating point maths"
  1714. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1715. help
  1716. Say Y to include VFP support code in the kernel. This is needed
  1717. if your hardware includes a VFP unit.
  1718. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1719. release notes and additional status information.
  1720. Say N if your target does not have VFP hardware.
  1721. config VFPv3
  1722. bool
  1723. depends on VFP
  1724. default y if CPU_V7
  1725. config NEON
  1726. bool "Advanced SIMD (NEON) Extension support"
  1727. depends on VFPv3 && CPU_V7
  1728. help
  1729. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1730. Extension.
  1731. endmenu
  1732. menu "Userspace binary formats"
  1733. source "fs/Kconfig.binfmt"
  1734. config ARTHUR
  1735. tristate "RISC OS personality"
  1736. depends on !AEABI
  1737. help
  1738. Say Y here to include the kernel code necessary if you want to run
  1739. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1740. experimental; if this sounds frightening, say N and sleep in peace.
  1741. You can also say M here to compile this support as a module (which
  1742. will be called arthur).
  1743. endmenu
  1744. menu "Power management options"
  1745. source "kernel/power/Kconfig"
  1746. config ARCH_SUSPEND_POSSIBLE
  1747. depends on !ARCH_S5P64X0 && !ARCH_S5PC100
  1748. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1749. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1750. def_bool y
  1751. endmenu
  1752. source "net/Kconfig"
  1753. source "drivers/Kconfig"
  1754. source "fs/Kconfig"
  1755. source "arch/arm/Kconfig.debug"
  1756. source "security/Kconfig"
  1757. source "crypto/Kconfig"
  1758. source "lib/Kconfig"