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"
  157. depends on !XIP_KERNEL && MMU
  158. depends on !ARCH_REALVIEW || !SPARSEMEM
  159. help
  160. Patch phys-to-virt and virt-to-phys translation functions at
  161. boot and module load time according to the position of the
  162. kernel in system memory.
  163. This can only be used with non-XIP MMU kernels where the base
  164. of physical memory is at a 16MB boundary, or theoretically 64K
  165. for the MSM machine class.
  166. config ARM_PATCH_PHYS_VIRT_16BIT
  167. def_bool y
  168. depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
  169. help
  170. This option extends the physical to virtual translation patching
  171. to allow physical memory down to a theoretical minimum of 64K
  172. boundaries.
  173. source "init/Kconfig"
  174. source "kernel/Kconfig.freezer"
  175. menu "System Type"
  176. config MMU
  177. bool "MMU-based Paged Memory Management Support"
  178. default y
  179. help
  180. Select if you want MMU-based virtualised addressing space
  181. support by paged memory management. If unsure, say 'Y'.
  182. #
  183. # The "ARM system type" choice list is ordered alphabetically by option
  184. # text. Please add new entries in the option alphabetic order.
  185. #
  186. choice
  187. prompt "ARM system type"
  188. default ARCH_VERSATILE
  189. config ARCH_INTEGRATOR
  190. bool "ARM Ltd. Integrator family"
  191. select ARM_AMBA
  192. select ARCH_HAS_CPUFREQ
  193. select CLKDEV_LOOKUP
  194. select HAVE_MACH_CLKDEV
  195. select ICST
  196. select GENERIC_CLOCKEVENTS
  197. select PLAT_VERSATILE
  198. select PLAT_VERSATILE_FPGA_IRQ
  199. help
  200. Support for ARM's Integrator platform.
  201. config ARCH_REALVIEW
  202. bool "ARM Ltd. RealView family"
  203. select ARM_AMBA
  204. select CLKDEV_LOOKUP
  205. select HAVE_MACH_CLKDEV
  206. select ICST
  207. select GENERIC_CLOCKEVENTS
  208. select ARCH_WANT_OPTIONAL_GPIOLIB
  209. select PLAT_VERSATILE
  210. select PLAT_VERSATILE_CLCD
  211. select ARM_TIMER_SP804
  212. select GPIO_PL061 if GPIOLIB
  213. help
  214. This enables support for ARM Ltd RealView boards.
  215. config ARCH_VERSATILE
  216. bool "ARM Ltd. Versatile family"
  217. select ARM_AMBA
  218. select ARM_VIC
  219. select CLKDEV_LOOKUP
  220. select HAVE_MACH_CLKDEV
  221. select ICST
  222. select GENERIC_CLOCKEVENTS
  223. select ARCH_WANT_OPTIONAL_GPIOLIB
  224. select PLAT_VERSATILE
  225. select PLAT_VERSATILE_CLCD
  226. select PLAT_VERSATILE_FPGA_IRQ
  227. select ARM_TIMER_SP804
  228. help
  229. This enables support for ARM Ltd Versatile board.
  230. config ARCH_VEXPRESS
  231. bool "ARM Ltd. Versatile Express family"
  232. select ARCH_WANT_OPTIONAL_GPIOLIB
  233. select ARM_AMBA
  234. select ARM_TIMER_SP804
  235. select CLKDEV_LOOKUP
  236. select HAVE_MACH_CLKDEV
  237. select GENERIC_CLOCKEVENTS
  238. select HAVE_CLK
  239. select HAVE_PATA_PLATFORM
  240. select ICST
  241. select PLAT_VERSATILE
  242. select PLAT_VERSATILE_CLCD
  243. help
  244. This enables support for the ARM Ltd Versatile Express boards.
  245. config ARCH_AT91
  246. bool "Atmel AT91"
  247. select ARCH_REQUIRE_GPIOLIB
  248. select HAVE_CLK
  249. select CLKDEV_LOOKUP
  250. select ARM_PATCH_PHYS_VIRT if MMU
  251. help
  252. This enables support for systems based on the Atmel AT91RM9200,
  253. AT91SAM9 and AT91CAP9 processors.
  254. config ARCH_BCMRING
  255. bool "Broadcom BCMRING"
  256. depends on MMU
  257. select CPU_V6
  258. select ARM_AMBA
  259. select ARM_TIMER_SP804
  260. select CLKDEV_LOOKUP
  261. select GENERIC_CLOCKEVENTS
  262. select ARCH_WANT_OPTIONAL_GPIOLIB
  263. help
  264. Support for Broadcom's BCMRing platform.
  265. config ARCH_CLPS711X
  266. bool "Cirrus Logic CLPS711x/EP721x-based"
  267. select CPU_ARM720T
  268. select ARCH_USES_GETTIMEOFFSET
  269. help
  270. Support for Cirrus Logic 711x/721x based boards.
  271. config ARCH_CNS3XXX
  272. bool "Cavium Networks CNS3XXX family"
  273. select CPU_V6K
  274. select GENERIC_CLOCKEVENTS
  275. select ARM_GIC
  276. select MIGHT_HAVE_PCI
  277. select PCI_DOMAINS if PCI
  278. help
  279. Support for Cavium Networks CNS3XXX platform.
  280. config ARCH_GEMINI
  281. bool "Cortina Systems Gemini"
  282. select CPU_FA526
  283. select ARCH_REQUIRE_GPIOLIB
  284. select ARCH_USES_GETTIMEOFFSET
  285. help
  286. Support for the Cortina Systems Gemini family SoCs
  287. config ARCH_PRIMA2
  288. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  289. select CPU_V7
  290. select GENERIC_TIME
  291. select NO_IOPORT
  292. select GENERIC_CLOCKEVENTS
  293. select CLKDEV_LOOKUP
  294. select GENERIC_IRQ_CHIP
  295. select USE_OF
  296. select ZONE_DMA
  297. help
  298. Support for CSR SiRFSoC ARM Cortex A9 Platform
  299. config ARCH_EBSA110
  300. bool "EBSA-110"
  301. select CPU_SA110
  302. select ISA
  303. select NO_IOPORT
  304. select ARCH_USES_GETTIMEOFFSET
  305. help
  306. This is an evaluation board for the StrongARM processor available
  307. from Digital. It has limited hardware on-board, including an
  308. Ethernet interface, two PCMCIA sockets, two serial ports and a
  309. parallel port.
  310. config ARCH_EP93XX
  311. bool "EP93xx-based"
  312. select CPU_ARM920T
  313. select ARM_AMBA
  314. select ARM_VIC
  315. select CLKDEV_LOOKUP
  316. select ARCH_REQUIRE_GPIOLIB
  317. select ARCH_HAS_HOLES_MEMORYMODEL
  318. select ARCH_USES_GETTIMEOFFSET
  319. help
  320. This enables support for the Cirrus EP93xx series of CPUs.
  321. config ARCH_FOOTBRIDGE
  322. bool "FootBridge"
  323. select CPU_SA110
  324. select FOOTBRIDGE
  325. select GENERIC_CLOCKEVENTS
  326. help
  327. Support for systems based on the DC21285 companion chip
  328. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  329. config ARCH_MXC
  330. bool "Freescale MXC/iMX-based"
  331. select GENERIC_CLOCKEVENTS
  332. select ARCH_REQUIRE_GPIOLIB
  333. select CLKDEV_LOOKUP
  334. select CLKSRC_MMIO
  335. select GENERIC_IRQ_CHIP
  336. select HAVE_SCHED_CLOCK
  337. help
  338. Support for Freescale MXC/iMX-based family of processors
  339. config ARCH_MXS
  340. bool "Freescale MXS-based"
  341. select GENERIC_CLOCKEVENTS
  342. select ARCH_REQUIRE_GPIOLIB
  343. select CLKDEV_LOOKUP
  344. select CLKSRC_MMIO
  345. help
  346. Support for Freescale MXS-based family of processors
  347. config ARCH_NETX
  348. bool "Hilscher NetX based"
  349. select CLKSRC_MMIO
  350. select CPU_ARM926T
  351. select ARM_VIC
  352. select GENERIC_CLOCKEVENTS
  353. help
  354. This enables support for systems based on the Hilscher NetX Soc
  355. config ARCH_H720X
  356. bool "Hynix HMS720x-based"
  357. select CPU_ARM720T
  358. select ISA_DMA_API
  359. select ARCH_USES_GETTIMEOFFSET
  360. help
  361. This enables support for systems based on the Hynix HMS720x
  362. config ARCH_IOP13XX
  363. bool "IOP13xx-based"
  364. depends on MMU
  365. select CPU_XSC3
  366. select PLAT_IOP
  367. select PCI
  368. select ARCH_SUPPORTS_MSI
  369. select VMSPLIT_1G
  370. help
  371. Support for Intel's IOP13XX (XScale) family of processors.
  372. config ARCH_IOP32X
  373. bool "IOP32x-based"
  374. depends on MMU
  375. select CPU_XSCALE
  376. select PLAT_IOP
  377. select PCI
  378. select ARCH_REQUIRE_GPIOLIB
  379. help
  380. Support for Intel's 80219 and IOP32X (XScale) family of
  381. processors.
  382. config ARCH_IOP33X
  383. bool "IOP33x-based"
  384. depends on MMU
  385. select CPU_XSCALE
  386. select PLAT_IOP
  387. select PCI
  388. select ARCH_REQUIRE_GPIOLIB
  389. help
  390. Support for Intel's IOP33X (XScale) family of processors.
  391. config ARCH_IXP23XX
  392. bool "IXP23XX-based"
  393. depends on MMU
  394. select CPU_XSC3
  395. select PCI
  396. select ARCH_USES_GETTIMEOFFSET
  397. help
  398. Support for Intel's IXP23xx (XScale) family of processors.
  399. config ARCH_IXP2000
  400. bool "IXP2400/2800-based"
  401. depends on MMU
  402. select CPU_XSCALE
  403. select PCI
  404. select ARCH_USES_GETTIMEOFFSET
  405. help
  406. Support for Intel's IXP2400/2800 (XScale) family of processors.
  407. config ARCH_IXP4XX
  408. bool "IXP4xx-based"
  409. depends on MMU
  410. select CLKSRC_MMIO
  411. select CPU_XSCALE
  412. select GENERIC_GPIO
  413. select GENERIC_CLOCKEVENTS
  414. select HAVE_SCHED_CLOCK
  415. select MIGHT_HAVE_PCI
  416. select DMABOUNCE if PCI
  417. help
  418. Support for Intel's IXP4XX (XScale) family of processors.
  419. config ARCH_DOVE
  420. bool "Marvell Dove"
  421. select CPU_V7
  422. select PCI
  423. select ARCH_REQUIRE_GPIOLIB
  424. select GENERIC_CLOCKEVENTS
  425. select PLAT_ORION
  426. help
  427. Support for the Marvell Dove SoC 88AP510
  428. config ARCH_KIRKWOOD
  429. bool "Marvell Kirkwood"
  430. select CPU_FEROCEON
  431. select PCI
  432. select ARCH_REQUIRE_GPIOLIB
  433. select GENERIC_CLOCKEVENTS
  434. select PLAT_ORION
  435. help
  436. Support for the following Marvell Kirkwood series SoCs:
  437. 88F6180, 88F6192 and 88F6281.
  438. config ARCH_LPC32XX
  439. bool "NXP LPC32XX"
  440. select CLKSRC_MMIO
  441. select CPU_ARM926T
  442. select ARCH_REQUIRE_GPIOLIB
  443. select HAVE_IDE
  444. select ARM_AMBA
  445. select USB_ARCH_HAS_OHCI
  446. select CLKDEV_LOOKUP
  447. select GENERIC_TIME
  448. select GENERIC_CLOCKEVENTS
  449. help
  450. Support for the NXP LPC32XX family of processors
  451. config ARCH_MV78XX0
  452. bool "Marvell MV78xx0"
  453. select CPU_FEROCEON
  454. select PCI
  455. select ARCH_REQUIRE_GPIOLIB
  456. select GENERIC_CLOCKEVENTS
  457. select PLAT_ORION
  458. help
  459. Support for the following Marvell MV78xx0 series SoCs:
  460. MV781x0, MV782x0.
  461. config ARCH_ORION5X
  462. bool "Marvell Orion"
  463. depends on MMU
  464. select CPU_FEROCEON
  465. select PCI
  466. select ARCH_REQUIRE_GPIOLIB
  467. select GENERIC_CLOCKEVENTS
  468. select PLAT_ORION
  469. help
  470. Support for the following Marvell Orion 5x series SoCs:
  471. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  472. Orion-2 (5281), Orion-1-90 (6183).
  473. config ARCH_MMP
  474. bool "Marvell PXA168/910/MMP2"
  475. depends on MMU
  476. select ARCH_REQUIRE_GPIOLIB
  477. select CLKDEV_LOOKUP
  478. select GENERIC_CLOCKEVENTS
  479. select HAVE_SCHED_CLOCK
  480. select TICK_ONESHOT
  481. select PLAT_PXA
  482. select SPARSE_IRQ
  483. help
  484. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  485. config ARCH_KS8695
  486. bool "Micrel/Kendin KS8695"
  487. select CPU_ARM922T
  488. select ARCH_REQUIRE_GPIOLIB
  489. select ARCH_USES_GETTIMEOFFSET
  490. help
  491. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  492. System-on-Chip devices.
  493. config ARCH_W90X900
  494. bool "Nuvoton W90X900 CPU"
  495. select CPU_ARM926T
  496. select ARCH_REQUIRE_GPIOLIB
  497. select CLKDEV_LOOKUP
  498. select CLKSRC_MMIO
  499. select GENERIC_CLOCKEVENTS
  500. help
  501. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  502. At present, the w90x900 has been renamed nuc900, regarding
  503. the ARM series product line, you can login the following
  504. link address to know more.
  505. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  506. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  507. config ARCH_NUC93X
  508. bool "Nuvoton NUC93X CPU"
  509. select CPU_ARM926T
  510. select CLKDEV_LOOKUP
  511. help
  512. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  513. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  514. config ARCH_TEGRA
  515. bool "NVIDIA Tegra"
  516. select CLKDEV_LOOKUP
  517. select CLKSRC_MMIO
  518. select GENERIC_TIME
  519. select GENERIC_CLOCKEVENTS
  520. select GENERIC_GPIO
  521. select HAVE_CLK
  522. select HAVE_SCHED_CLOCK
  523. select ARCH_HAS_CPUFREQ
  524. help
  525. This enables support for NVIDIA Tegra based systems (Tegra APX,
  526. Tegra 6xx and Tegra 2 series).
  527. config ARCH_PNX4008
  528. bool "Philips Nexperia PNX4008 Mobile"
  529. select CPU_ARM926T
  530. select CLKDEV_LOOKUP
  531. select ARCH_USES_GETTIMEOFFSET
  532. help
  533. This enables support for Philips PNX4008 mobile platform.
  534. config ARCH_PXA
  535. bool "PXA2xx/PXA3xx-based"
  536. depends on MMU
  537. select ARCH_MTD_XIP
  538. select ARCH_HAS_CPUFREQ
  539. select CLKDEV_LOOKUP
  540. select CLKSRC_MMIO
  541. select ARCH_REQUIRE_GPIOLIB
  542. select GENERIC_CLOCKEVENTS
  543. select HAVE_SCHED_CLOCK
  544. select TICK_ONESHOT
  545. select PLAT_PXA
  546. select SPARSE_IRQ
  547. select AUTO_ZRELADDR
  548. select MULTI_IRQ_HANDLER
  549. help
  550. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  551. config ARCH_MSM
  552. bool "Qualcomm MSM"
  553. select HAVE_CLK
  554. select GENERIC_CLOCKEVENTS
  555. select ARCH_REQUIRE_GPIOLIB
  556. select CLKDEV_LOOKUP
  557. help
  558. Support for Qualcomm MSM/QSD based systems. This runs on the
  559. apps processor of the MSM/QSD and depends on a shared memory
  560. interface to the modem processor which runs the baseband
  561. stack and controls some vital subsystems
  562. (clock and power control, etc).
  563. config ARCH_SHMOBILE
  564. bool "Renesas SH-Mobile / R-Mobile"
  565. select HAVE_CLK
  566. select CLKDEV_LOOKUP
  567. select HAVE_MACH_CLKDEV
  568. select GENERIC_CLOCKEVENTS
  569. select NO_IOPORT
  570. select SPARSE_IRQ
  571. select MULTI_IRQ_HANDLER
  572. select PM_GENERIC_DOMAINS if PM
  573. help
  574. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  575. config ARCH_RPC
  576. bool "RiscPC"
  577. select ARCH_ACORN
  578. select FIQ
  579. select TIMER_ACORN
  580. select ARCH_MAY_HAVE_PC_FDC
  581. select HAVE_PATA_PLATFORM
  582. select ISA_DMA_API
  583. select NO_IOPORT
  584. select ARCH_SPARSEMEM_ENABLE
  585. select ARCH_USES_GETTIMEOFFSET
  586. help
  587. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  588. CD-ROM interface, serial and parallel port, and the floppy drive.
  589. config ARCH_SA1100
  590. bool "SA1100-based"
  591. select CLKSRC_MMIO
  592. select CPU_SA1100
  593. select ISA
  594. select ARCH_SPARSEMEM_ENABLE
  595. select ARCH_MTD_XIP
  596. select ARCH_HAS_CPUFREQ
  597. select CPU_FREQ
  598. select GENERIC_CLOCKEVENTS
  599. select HAVE_CLK
  600. select HAVE_SCHED_CLOCK
  601. select TICK_ONESHOT
  602. select ARCH_REQUIRE_GPIOLIB
  603. help
  604. Support for StrongARM 11x0 based boards.
  605. config ARCH_S3C2410
  606. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  607. select GENERIC_GPIO
  608. select ARCH_HAS_CPUFREQ
  609. select HAVE_CLK
  610. select CLKDEV_LOOKUP
  611. select ARCH_USES_GETTIMEOFFSET
  612. select HAVE_S3C2410_I2C if I2C
  613. help
  614. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  615. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  616. the Samsung SMDK2410 development board (and derivatives).
  617. Note, the S3C2416 and the S3C2450 are so close that they even share
  618. the same SoC ID code. This means that there is no separate machine
  619. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  620. config ARCH_S3C64XX
  621. bool "Samsung S3C64XX"
  622. select PLAT_SAMSUNG
  623. select CPU_V6
  624. select ARM_VIC
  625. select HAVE_CLK
  626. select CLKDEV_LOOKUP
  627. select NO_IOPORT
  628. select ARCH_USES_GETTIMEOFFSET
  629. select ARCH_HAS_CPUFREQ
  630. select ARCH_REQUIRE_GPIOLIB
  631. select SAMSUNG_CLKSRC
  632. select SAMSUNG_IRQ_VIC_TIMER
  633. select SAMSUNG_IRQ_UART
  634. select S3C_GPIO_TRACK
  635. select S3C_GPIO_PULL_UPDOWN
  636. select S3C_GPIO_CFG_S3C24XX
  637. select S3C_GPIO_CFG_S3C64XX
  638. select S3C_DEV_NAND
  639. select USB_ARCH_HAS_OHCI
  640. select SAMSUNG_GPIOLIB_4BIT
  641. select HAVE_S3C2410_I2C if I2C
  642. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  643. help
  644. Samsung S3C64XX series based systems
  645. config ARCH_S5P64X0
  646. bool "Samsung S5P6440 S5P6450"
  647. select CPU_V6
  648. select GENERIC_GPIO
  649. select HAVE_CLK
  650. select CLKDEV_LOOKUP
  651. select CLKSRC_MMIO
  652. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  653. select GENERIC_CLOCKEVENTS
  654. select HAVE_SCHED_CLOCK
  655. select HAVE_S3C2410_I2C if I2C
  656. select HAVE_S3C_RTC if RTC_CLASS
  657. help
  658. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  659. SMDK6450.
  660. config ARCH_S5PC100
  661. bool "Samsung S5PC100"
  662. select GENERIC_GPIO
  663. select HAVE_CLK
  664. select CLKDEV_LOOKUP
  665. select CPU_V7
  666. select ARM_L1_CACHE_SHIFT_6
  667. select ARCH_USES_GETTIMEOFFSET
  668. select HAVE_S3C2410_I2C if I2C
  669. select HAVE_S3C_RTC if RTC_CLASS
  670. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  671. help
  672. Samsung S5PC100 series based systems
  673. config ARCH_S5PV210
  674. bool "Samsung S5PV210/S5PC110"
  675. select CPU_V7
  676. select ARCH_SPARSEMEM_ENABLE
  677. select ARCH_HAS_HOLES_MEMORYMODEL
  678. select GENERIC_GPIO
  679. select HAVE_CLK
  680. select CLKDEV_LOOKUP
  681. select CLKSRC_MMIO
  682. select ARM_L1_CACHE_SHIFT_6
  683. select ARCH_HAS_CPUFREQ
  684. select GENERIC_CLOCKEVENTS
  685. select HAVE_SCHED_CLOCK
  686. select HAVE_S3C2410_I2C if I2C
  687. select HAVE_S3C_RTC if RTC_CLASS
  688. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  689. help
  690. Samsung S5PV210/S5PC110 series based systems
  691. config ARCH_EXYNOS4
  692. bool "Samsung EXYNOS4"
  693. select CPU_V7
  694. select ARCH_SPARSEMEM_ENABLE
  695. select ARCH_HAS_HOLES_MEMORYMODEL
  696. select GENERIC_GPIO
  697. select HAVE_CLK
  698. select CLKDEV_LOOKUP
  699. select ARCH_HAS_CPUFREQ
  700. select GENERIC_CLOCKEVENTS
  701. select HAVE_S3C_RTC if RTC_CLASS
  702. select HAVE_S3C2410_I2C if I2C
  703. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  704. help
  705. Samsung EXYNOS4 series based systems
  706. config ARCH_SHARK
  707. bool "Shark"
  708. select CPU_SA110
  709. select ISA
  710. select ISA_DMA
  711. select ZONE_DMA
  712. select PCI
  713. select ARCH_USES_GETTIMEOFFSET
  714. help
  715. Support for the StrongARM based Digital DNARD machine, also known
  716. as "Shark" (<http://www.shark-linux.de/shark.html>).
  717. config ARCH_TCC_926
  718. bool "Telechips TCC ARM926-based systems"
  719. select CLKSRC_MMIO
  720. select CPU_ARM926T
  721. select HAVE_CLK
  722. select CLKDEV_LOOKUP
  723. select GENERIC_CLOCKEVENTS
  724. help
  725. Support for Telechips TCC ARM926-based systems.
  726. config ARCH_U300
  727. bool "ST-Ericsson U300 Series"
  728. depends on MMU
  729. select CLKSRC_MMIO
  730. select CPU_ARM926T
  731. select HAVE_SCHED_CLOCK
  732. select HAVE_TCM
  733. select ARM_AMBA
  734. select ARM_VIC
  735. select GENERIC_CLOCKEVENTS
  736. select CLKDEV_LOOKUP
  737. select HAVE_MACH_CLKDEV
  738. select GENERIC_GPIO
  739. help
  740. Support for ST-Ericsson U300 series mobile platforms.
  741. config ARCH_U8500
  742. bool "ST-Ericsson U8500 Series"
  743. select CPU_V7
  744. select ARM_AMBA
  745. select GENERIC_CLOCKEVENTS
  746. select CLKDEV_LOOKUP
  747. select ARCH_REQUIRE_GPIOLIB
  748. select ARCH_HAS_CPUFREQ
  749. help
  750. Support for ST-Ericsson's Ux500 architecture
  751. config ARCH_NOMADIK
  752. bool "STMicroelectronics Nomadik"
  753. select ARM_AMBA
  754. select ARM_VIC
  755. select CPU_ARM926T
  756. select CLKDEV_LOOKUP
  757. select GENERIC_CLOCKEVENTS
  758. select ARCH_REQUIRE_GPIOLIB
  759. help
  760. Support for the Nomadik platform by ST-Ericsson
  761. config ARCH_DAVINCI
  762. bool "TI DaVinci"
  763. select GENERIC_CLOCKEVENTS
  764. select ARCH_REQUIRE_GPIOLIB
  765. select ZONE_DMA
  766. select HAVE_IDE
  767. select CLKDEV_LOOKUP
  768. select GENERIC_ALLOCATOR
  769. select GENERIC_IRQ_CHIP
  770. select ARCH_HAS_HOLES_MEMORYMODEL
  771. help
  772. Support for TI's DaVinci platform.
  773. config ARCH_OMAP
  774. bool "TI OMAP"
  775. select HAVE_CLK
  776. select ARCH_REQUIRE_GPIOLIB
  777. select ARCH_HAS_CPUFREQ
  778. select CLKSRC_MMIO
  779. select GENERIC_CLOCKEVENTS
  780. select HAVE_SCHED_CLOCK
  781. select ARCH_HAS_HOLES_MEMORYMODEL
  782. help
  783. Support for TI's OMAP platform (OMAP1/2/3/4).
  784. config PLAT_SPEAR
  785. bool "ST SPEAr"
  786. select ARM_AMBA
  787. select ARCH_REQUIRE_GPIOLIB
  788. select CLKDEV_LOOKUP
  789. select CLKSRC_MMIO
  790. select GENERIC_CLOCKEVENTS
  791. select HAVE_CLK
  792. help
  793. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  794. config ARCH_VT8500
  795. bool "VIA/WonderMedia 85xx"
  796. select CPU_ARM926T
  797. select GENERIC_GPIO
  798. select ARCH_HAS_CPUFREQ
  799. select GENERIC_CLOCKEVENTS
  800. select ARCH_REQUIRE_GPIOLIB
  801. select HAVE_PWM
  802. help
  803. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  804. config ARCH_ZYNQ
  805. bool "Xilinx Zynq ARM Cortex A9 Platform"
  806. select CPU_V7
  807. select GENERIC_TIME
  808. select GENERIC_CLOCKEVENTS
  809. select CLKDEV_LOOKUP
  810. select ARM_GIC
  811. select ARM_AMBA
  812. select ICST
  813. select USE_OF
  814. help
  815. Support for Xilinx Zynq ARM Cortex A9 Platform
  816. endchoice
  817. #
  818. # This is sorted alphabetically by mach-* pathname. However, plat-*
  819. # Kconfigs may be included either alphabetically (according to the
  820. # plat- suffix) or along side the corresponding mach-* source.
  821. #
  822. source "arch/arm/mach-at91/Kconfig"
  823. source "arch/arm/mach-bcmring/Kconfig"
  824. source "arch/arm/mach-clps711x/Kconfig"
  825. source "arch/arm/mach-cns3xxx/Kconfig"
  826. source "arch/arm/mach-davinci/Kconfig"
  827. source "arch/arm/mach-dove/Kconfig"
  828. source "arch/arm/mach-ep93xx/Kconfig"
  829. source "arch/arm/mach-footbridge/Kconfig"
  830. source "arch/arm/mach-gemini/Kconfig"
  831. source "arch/arm/mach-h720x/Kconfig"
  832. source "arch/arm/mach-integrator/Kconfig"
  833. source "arch/arm/mach-iop32x/Kconfig"
  834. source "arch/arm/mach-iop33x/Kconfig"
  835. source "arch/arm/mach-iop13xx/Kconfig"
  836. source "arch/arm/mach-ixp4xx/Kconfig"
  837. source "arch/arm/mach-ixp2000/Kconfig"
  838. source "arch/arm/mach-ixp23xx/Kconfig"
  839. source "arch/arm/mach-kirkwood/Kconfig"
  840. source "arch/arm/mach-ks8695/Kconfig"
  841. source "arch/arm/mach-lpc32xx/Kconfig"
  842. source "arch/arm/mach-msm/Kconfig"
  843. source "arch/arm/mach-mv78xx0/Kconfig"
  844. source "arch/arm/plat-mxc/Kconfig"
  845. source "arch/arm/mach-mxs/Kconfig"
  846. source "arch/arm/mach-netx/Kconfig"
  847. source "arch/arm/mach-nomadik/Kconfig"
  848. source "arch/arm/plat-nomadik/Kconfig"
  849. source "arch/arm/mach-nuc93x/Kconfig"
  850. source "arch/arm/plat-omap/Kconfig"
  851. source "arch/arm/mach-omap1/Kconfig"
  852. source "arch/arm/mach-omap2/Kconfig"
  853. source "arch/arm/mach-orion5x/Kconfig"
  854. source "arch/arm/mach-pxa/Kconfig"
  855. source "arch/arm/plat-pxa/Kconfig"
  856. source "arch/arm/mach-mmp/Kconfig"
  857. source "arch/arm/mach-realview/Kconfig"
  858. source "arch/arm/mach-sa1100/Kconfig"
  859. source "arch/arm/plat-samsung/Kconfig"
  860. source "arch/arm/plat-s3c24xx/Kconfig"
  861. source "arch/arm/plat-s5p/Kconfig"
  862. source "arch/arm/plat-spear/Kconfig"
  863. source "arch/arm/plat-tcc/Kconfig"
  864. if ARCH_S3C2410
  865. source "arch/arm/mach-s3c2410/Kconfig"
  866. source "arch/arm/mach-s3c2412/Kconfig"
  867. source "arch/arm/mach-s3c2416/Kconfig"
  868. source "arch/arm/mach-s3c2440/Kconfig"
  869. source "arch/arm/mach-s3c2443/Kconfig"
  870. endif
  871. if ARCH_S3C64XX
  872. source "arch/arm/mach-s3c64xx/Kconfig"
  873. endif
  874. source "arch/arm/mach-s5p64x0/Kconfig"
  875. source "arch/arm/mach-s5pc100/Kconfig"
  876. source "arch/arm/mach-s5pv210/Kconfig"
  877. source "arch/arm/mach-exynos4/Kconfig"
  878. source "arch/arm/mach-shmobile/Kconfig"
  879. source "arch/arm/mach-tegra/Kconfig"
  880. source "arch/arm/mach-u300/Kconfig"
  881. source "arch/arm/mach-ux500/Kconfig"
  882. source "arch/arm/mach-versatile/Kconfig"
  883. source "arch/arm/mach-vexpress/Kconfig"
  884. source "arch/arm/plat-versatile/Kconfig"
  885. source "arch/arm/mach-vt8500/Kconfig"
  886. source "arch/arm/mach-w90x900/Kconfig"
  887. # Definitions to make life easier
  888. config ARCH_ACORN
  889. bool
  890. config PLAT_IOP
  891. bool
  892. select GENERIC_CLOCKEVENTS
  893. select HAVE_SCHED_CLOCK
  894. config PLAT_ORION
  895. bool
  896. select CLKSRC_MMIO
  897. select GENERIC_IRQ_CHIP
  898. select HAVE_SCHED_CLOCK
  899. config PLAT_PXA
  900. bool
  901. config PLAT_VERSATILE
  902. bool
  903. config ARM_TIMER_SP804
  904. bool
  905. select CLKSRC_MMIO
  906. source arch/arm/mm/Kconfig
  907. config IWMMXT
  908. bool "Enable iWMMXt support"
  909. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  910. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  911. help
  912. Enable support for iWMMXt context switching at run time if
  913. running on a CPU that supports it.
  914. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  915. config XSCALE_PMU
  916. bool
  917. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  918. default y
  919. config CPU_HAS_PMU
  920. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  921. (!ARCH_OMAP3 || OMAP3_EMU)
  922. default y
  923. bool
  924. config MULTI_IRQ_HANDLER
  925. bool
  926. help
  927. Allow each machine to specify it's own IRQ handler at run time.
  928. if !MMU
  929. source "arch/arm/Kconfig-nommu"
  930. endif
  931. config ARM_ERRATA_411920
  932. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  933. depends on CPU_V6 || CPU_V6K
  934. help
  935. Invalidation of the Instruction Cache operation can
  936. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  937. It does not affect the MPCore. This option enables the ARM Ltd.
  938. recommended workaround.
  939. config ARM_ERRATA_430973
  940. bool "ARM errata: Stale prediction on replaced interworking branch"
  941. depends on CPU_V7
  942. help
  943. This option enables the workaround for the 430973 Cortex-A8
  944. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  945. interworking branch is replaced with another code sequence at the
  946. same virtual address, whether due to self-modifying code or virtual
  947. to physical address re-mapping, Cortex-A8 does not recover from the
  948. stale interworking branch prediction. This results in Cortex-A8
  949. executing the new code sequence in the incorrect ARM or Thumb state.
  950. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  951. and also flushes the branch target cache at every context switch.
  952. Note that setting specific bits in the ACTLR register may not be
  953. available in non-secure mode.
  954. config ARM_ERRATA_458693
  955. bool "ARM errata: Processor deadlock when a false hazard is created"
  956. depends on CPU_V7
  957. help
  958. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  959. erratum. For very specific sequences of memory operations, it is
  960. possible for a hazard condition intended for a cache line to instead
  961. be incorrectly associated with a different cache line. This false
  962. hazard might then cause a processor deadlock. The workaround enables
  963. the L1 caching of the NEON accesses and disables the PLD instruction
  964. in the ACTLR register. Note that setting specific bits in the ACTLR
  965. register may not be available in non-secure mode.
  966. config ARM_ERRATA_460075
  967. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  968. depends on CPU_V7
  969. help
  970. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  971. erratum. Any asynchronous access to the L2 cache may encounter a
  972. situation in which recent store transactions to the L2 cache are lost
  973. and overwritten with stale memory contents from external memory. The
  974. workaround disables the write-allocate mode for the L2 cache via the
  975. ACTLR register. Note that setting specific bits in the ACTLR register
  976. may not be available in non-secure mode.
  977. config ARM_ERRATA_742230
  978. bool "ARM errata: DMB operation may be faulty"
  979. depends on CPU_V7 && SMP
  980. help
  981. This option enables the workaround for the 742230 Cortex-A9
  982. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  983. between two write operations may not ensure the correct visibility
  984. ordering of the two writes. This workaround sets a specific bit in
  985. the diagnostic register of the Cortex-A9 which causes the DMB
  986. instruction to behave as a DSB, ensuring the correct behaviour of
  987. the two writes.
  988. config ARM_ERRATA_742231
  989. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  990. depends on CPU_V7 && SMP
  991. help
  992. This option enables the workaround for the 742231 Cortex-A9
  993. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  994. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  995. accessing some data located in the same cache line, may get corrupted
  996. data due to bad handling of the address hazard when the line gets
  997. replaced from one of the CPUs at the same time as another CPU is
  998. accessing it. This workaround sets specific bits in the diagnostic
  999. register of the Cortex-A9 which reduces the linefill issuing
  1000. capabilities of the processor.
  1001. config PL310_ERRATA_588369
  1002. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1003. depends on CACHE_L2X0
  1004. help
  1005. The PL310 L2 cache controller implements three types of Clean &
  1006. Invalidate maintenance operations: by Physical Address
  1007. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1008. They are architecturally defined to behave as the execution of a
  1009. clean operation followed immediately by an invalidate operation,
  1010. both performing to the same memory location. This functionality
  1011. is not correctly implemented in PL310 as clean lines are not
  1012. invalidated as a result of these operations.
  1013. config ARM_ERRATA_720789
  1014. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1015. depends on CPU_V7 && SMP
  1016. help
  1017. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1018. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1019. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1020. As a consequence of this erratum, some TLB entries which should be
  1021. invalidated are not, resulting in an incoherency in the system page
  1022. tables. The workaround changes the TLB flushing routines to invalidate
  1023. entries regardless of the ASID.
  1024. config PL310_ERRATA_727915
  1025. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1026. depends on CACHE_L2X0
  1027. help
  1028. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1029. operation (offset 0x7FC). This operation runs in background so that
  1030. PL310 can handle normal accesses while it is in progress. Under very
  1031. rare circumstances, due to this erratum, write data can be lost when
  1032. PL310 treats a cacheable write transaction during a Clean &
  1033. Invalidate by Way operation.
  1034. config ARM_ERRATA_743622
  1035. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1036. depends on CPU_V7
  1037. help
  1038. This option enables the workaround for the 743622 Cortex-A9
  1039. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1040. optimisation in the Cortex-A9 Store Buffer may lead to data
  1041. corruption. This workaround sets a specific bit in the diagnostic
  1042. register of the Cortex-A9 which disables the Store Buffer
  1043. optimisation, preventing the defect from occurring. This has no
  1044. visible impact on the overall performance or power consumption of the
  1045. processor.
  1046. config ARM_ERRATA_751472
  1047. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1048. depends on CPU_V7 && SMP
  1049. help
  1050. This option enables the workaround for the 751472 Cortex-A9 (prior
  1051. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1052. completion of a following broadcasted operation if the second
  1053. operation is received by a CPU before the ICIALLUIS has completed,
  1054. potentially leading to corrupted entries in the cache or TLB.
  1055. config ARM_ERRATA_753970
  1056. bool "ARM errata: cache sync operation may be faulty"
  1057. depends on CACHE_PL310
  1058. help
  1059. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1060. Under some condition the effect of cache sync operation on
  1061. the store buffer still remains when the operation completes.
  1062. This means that the store buffer is always asked to drain and
  1063. this prevents it from merging any further writes. The workaround
  1064. is to replace the normal offset of cache sync operation (0x730)
  1065. by another offset targeting an unmapped PL310 register 0x740.
  1066. This has the same effect as the cache sync operation: store buffer
  1067. drain and waiting for all buffers empty.
  1068. config ARM_ERRATA_754322
  1069. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1070. depends on CPU_V7
  1071. help
  1072. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1073. r3p*) erratum. A speculative memory access may cause a page table walk
  1074. which starts prior to an ASID switch but completes afterwards. This
  1075. can populate the micro-TLB with a stale entry which may be hit with
  1076. the new ASID. This workaround places two dsb instructions in the mm
  1077. switching code so that no page table walks can cross the ASID switch.
  1078. config ARM_ERRATA_754327
  1079. bool "ARM errata: no automatic Store Buffer drain"
  1080. depends on CPU_V7 && SMP
  1081. help
  1082. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1083. r2p0) erratum. The Store Buffer does not have any automatic draining
  1084. mechanism and therefore a livelock may occur if an external agent
  1085. continuously polls a memory location waiting to observe an update.
  1086. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1087. written polling loops from denying visibility of updates to memory.
  1088. config ARM_ERRATA_364296
  1089. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1090. depends on CPU_V6 && !SMP
  1091. help
  1092. This options enables the workaround for the 364296 ARM1136
  1093. r0p2 erratum (possible cache data corruption with
  1094. hit-under-miss enabled). It sets the undocumented bit 31 in
  1095. the auxiliary control register and the FI bit in the control
  1096. register, thus disabling hit-under-miss without putting the
  1097. processor into full low interrupt latency mode. ARM11MPCore
  1098. is not affected.
  1099. endmenu
  1100. source "arch/arm/common/Kconfig"
  1101. menu "Bus support"
  1102. config ARM_AMBA
  1103. bool
  1104. config ISA
  1105. bool
  1106. help
  1107. Find out whether you have ISA slots on your motherboard. ISA is the
  1108. name of a bus system, i.e. the way the CPU talks to the other stuff
  1109. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1110. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1111. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1112. # Select ISA DMA controller support
  1113. config ISA_DMA
  1114. bool
  1115. select ISA_DMA_API
  1116. # Select ISA DMA interface
  1117. config ISA_DMA_API
  1118. bool
  1119. config PCI
  1120. bool "PCI support" if MIGHT_HAVE_PCI
  1121. help
  1122. Find out whether you have a PCI motherboard. PCI is the name of a
  1123. bus system, i.e. the way the CPU talks to the other stuff inside
  1124. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1125. VESA. If you have PCI, say Y, otherwise N.
  1126. config PCI_DOMAINS
  1127. bool
  1128. depends on PCI
  1129. config PCI_NANOENGINE
  1130. bool "BSE nanoEngine PCI support"
  1131. depends on SA1100_NANOENGINE
  1132. help
  1133. Enable PCI on the BSE nanoEngine board.
  1134. config PCI_SYSCALL
  1135. def_bool PCI
  1136. # Select the host bridge type
  1137. config PCI_HOST_VIA82C505
  1138. bool
  1139. depends on PCI && ARCH_SHARK
  1140. default y
  1141. config PCI_HOST_ITE8152
  1142. bool
  1143. depends on PCI && MACH_ARMCORE
  1144. default y
  1145. select DMABOUNCE
  1146. source "drivers/pci/Kconfig"
  1147. source "drivers/pcmcia/Kconfig"
  1148. endmenu
  1149. menu "Kernel Features"
  1150. source "kernel/time/Kconfig"
  1151. config SMP
  1152. bool "Symmetric Multi-Processing"
  1153. depends on CPU_V6K || CPU_V7
  1154. depends on GENERIC_CLOCKEVENTS
  1155. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1156. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1157. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1158. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1159. select USE_GENERIC_SMP_HELPERS
  1160. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1161. help
  1162. This enables support for systems with more than one CPU. If you have
  1163. a system with only one CPU, like most personal computers, say N. If
  1164. you have a system with more than one CPU, say Y.
  1165. If you say N here, the kernel will run on single and multiprocessor
  1166. machines, but will use only one CPU of a multiprocessor machine. If
  1167. you say Y here, the kernel will run on many, but not all, single
  1168. processor machines. On a single processor machine, the kernel will
  1169. run faster if you say N here.
  1170. See also <file:Documentation/i386/IO-APIC.txt>,
  1171. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1172. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1173. If you don't know what to do here, say N.
  1174. config SMP_ON_UP
  1175. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1176. depends on EXPERIMENTAL
  1177. depends on SMP && !XIP_KERNEL
  1178. default y
  1179. help
  1180. SMP kernels contain instructions which fail on non-SMP processors.
  1181. Enabling this option allows the kernel to modify itself to make
  1182. these instructions safe. Disabling it allows about 1K of space
  1183. savings.
  1184. If you don't know what to do here, say Y.
  1185. config HAVE_ARM_SCU
  1186. bool
  1187. help
  1188. This option enables support for the ARM system coherency unit
  1189. config HAVE_ARM_TWD
  1190. bool
  1191. depends on SMP
  1192. select TICK_ONESHOT
  1193. help
  1194. This options enables support for the ARM timer and watchdog unit
  1195. choice
  1196. prompt "Memory split"
  1197. default VMSPLIT_3G
  1198. help
  1199. Select the desired split between kernel and user memory.
  1200. If you are not absolutely sure what you are doing, leave this
  1201. option alone!
  1202. config VMSPLIT_3G
  1203. bool "3G/1G user/kernel split"
  1204. config VMSPLIT_2G
  1205. bool "2G/2G user/kernel split"
  1206. config VMSPLIT_1G
  1207. bool "1G/3G user/kernel split"
  1208. endchoice
  1209. config PAGE_OFFSET
  1210. hex
  1211. default 0x40000000 if VMSPLIT_1G
  1212. default 0x80000000 if VMSPLIT_2G
  1213. default 0xC0000000
  1214. config NR_CPUS
  1215. int "Maximum number of CPUs (2-32)"
  1216. range 2 32
  1217. depends on SMP
  1218. default "4"
  1219. config HOTPLUG_CPU
  1220. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1221. depends on SMP && HOTPLUG && EXPERIMENTAL
  1222. help
  1223. Say Y here to experiment with turning CPUs off and on. CPUs
  1224. can be controlled through /sys/devices/system/cpu.
  1225. config LOCAL_TIMERS
  1226. bool "Use local timer interrupts"
  1227. depends on SMP
  1228. default y
  1229. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1230. help
  1231. Enable support for local timers on SMP platforms, rather then the
  1232. legacy IPI broadcast method. Local timers allows the system
  1233. accounting to be spread across the timer interval, preventing a
  1234. "thundering herd" at every timer tick.
  1235. source kernel/Kconfig.preempt
  1236. config HZ
  1237. int
  1238. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1239. ARCH_S5PV210 || ARCH_EXYNOS4
  1240. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1241. default AT91_TIMER_HZ if ARCH_AT91
  1242. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1243. default 100
  1244. config THUMB2_KERNEL
  1245. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1246. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1247. select AEABI
  1248. select ARM_ASM_UNIFIED
  1249. help
  1250. By enabling this option, the kernel will be compiled in
  1251. Thumb-2 mode. A compiler/assembler that understand the unified
  1252. ARM-Thumb syntax is needed.
  1253. If unsure, say N.
  1254. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1255. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1256. depends on THUMB2_KERNEL && MODULES
  1257. default y
  1258. help
  1259. Various binutils versions can resolve Thumb-2 branches to
  1260. locally-defined, preemptible global symbols as short-range "b.n"
  1261. branch instructions.
  1262. This is a problem, because there's no guarantee the final
  1263. destination of the symbol, or any candidate locations for a
  1264. trampoline, are within range of the branch. For this reason, the
  1265. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1266. relocation in modules at all, and it makes little sense to add
  1267. support.
  1268. The symptom is that the kernel fails with an "unsupported
  1269. relocation" error when loading some modules.
  1270. Until fixed tools are available, passing
  1271. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1272. code which hits this problem, at the cost of a bit of extra runtime
  1273. stack usage in some cases.
  1274. The problem is described in more detail at:
  1275. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1276. Only Thumb-2 kernels are affected.
  1277. Unless you are sure your tools don't have this problem, say Y.
  1278. config ARM_ASM_UNIFIED
  1279. bool
  1280. config AEABI
  1281. bool "Use the ARM EABI to compile the kernel"
  1282. help
  1283. This option allows for the kernel to be compiled using the latest
  1284. ARM ABI (aka EABI). This is only useful if you are using a user
  1285. space environment that is also compiled with EABI.
  1286. Since there are major incompatibilities between the legacy ABI and
  1287. EABI, especially with regard to structure member alignment, this
  1288. option also changes the kernel syscall calling convention to
  1289. disambiguate both ABIs and allow for backward compatibility support
  1290. (selected with CONFIG_OABI_COMPAT).
  1291. To use this you need GCC version 4.0.0 or later.
  1292. config OABI_COMPAT
  1293. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1294. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1295. default y
  1296. help
  1297. This option preserves the old syscall interface along with the
  1298. new (ARM EABI) one. It also provides a compatibility layer to
  1299. intercept syscalls that have structure arguments which layout
  1300. in memory differs between the legacy ABI and the new ARM EABI
  1301. (only for non "thumb" binaries). This option adds a tiny
  1302. overhead to all syscalls and produces a slightly larger kernel.
  1303. If you know you'll be using only pure EABI user space then you
  1304. can say N here. If this option is not selected and you attempt
  1305. to execute a legacy ABI binary then the result will be
  1306. UNPREDICTABLE (in fact it can be predicted that it won't work
  1307. at all). If in doubt say Y.
  1308. config ARCH_HAS_HOLES_MEMORYMODEL
  1309. bool
  1310. config ARCH_SPARSEMEM_ENABLE
  1311. bool
  1312. config ARCH_SPARSEMEM_DEFAULT
  1313. def_bool ARCH_SPARSEMEM_ENABLE
  1314. config ARCH_SELECT_MEMORY_MODEL
  1315. def_bool ARCH_SPARSEMEM_ENABLE
  1316. config HAVE_ARCH_PFN_VALID
  1317. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1318. config HIGHMEM
  1319. bool "High Memory Support"
  1320. depends on MMU
  1321. help
  1322. The address space of ARM processors is only 4 Gigabytes large
  1323. and it has to accommodate user address space, kernel address
  1324. space as well as some memory mapped IO. That means that, if you
  1325. have a large amount of physical memory and/or IO, not all of the
  1326. memory can be "permanently mapped" by the kernel. The physical
  1327. memory that is not permanently mapped is called "high memory".
  1328. Depending on the selected kernel/user memory split, minimum
  1329. vmalloc space and actual amount of RAM, you may not need this
  1330. option which should result in a slightly faster kernel.
  1331. If unsure, say n.
  1332. config HIGHPTE
  1333. bool "Allocate 2nd-level pagetables from highmem"
  1334. depends on HIGHMEM
  1335. config HW_PERF_EVENTS
  1336. bool "Enable hardware performance counter support for perf events"
  1337. depends on PERF_EVENTS && CPU_HAS_PMU
  1338. default y
  1339. help
  1340. Enable hardware performance counter support for perf events. If
  1341. disabled, perf events will use software events only.
  1342. source "mm/Kconfig"
  1343. config FORCE_MAX_ZONEORDER
  1344. int "Maximum zone order" if ARCH_SHMOBILE
  1345. range 11 64 if ARCH_SHMOBILE
  1346. default "9" if SA1111
  1347. default "11"
  1348. help
  1349. The kernel memory allocator divides physically contiguous memory
  1350. blocks into "zones", where each zone is a power of two number of
  1351. pages. This option selects the largest power of two that the kernel
  1352. keeps in the memory allocator. If you need to allocate very large
  1353. blocks of physically contiguous memory, then you may need to
  1354. increase this value.
  1355. This config option is actually maximum order plus one. For example,
  1356. a value of 11 means that the largest free memory block is 2^10 pages.
  1357. config LEDS
  1358. bool "Timer and CPU usage LEDs"
  1359. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1360. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1361. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1362. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1363. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1364. ARCH_AT91 || ARCH_DAVINCI || \
  1365. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1366. help
  1367. If you say Y here, the LEDs on your machine will be used
  1368. to provide useful information about your current system status.
  1369. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1370. be able to select which LEDs are active using the options below. If
  1371. you are compiling a kernel for the EBSA-110 or the LART however, the
  1372. red LED will simply flash regularly to indicate that the system is
  1373. still functional. It is safe to say Y here if you have a CATS
  1374. system, but the driver will do nothing.
  1375. config LEDS_TIMER
  1376. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1377. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1378. || MACH_OMAP_PERSEUS2
  1379. depends on LEDS
  1380. depends on !GENERIC_CLOCKEVENTS
  1381. default y if ARCH_EBSA110
  1382. help
  1383. If you say Y here, one of the system LEDs (the green one on the
  1384. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1385. will flash regularly to indicate that the system is still
  1386. operational. This is mainly useful to kernel hackers who are
  1387. debugging unstable kernels.
  1388. The LART uses the same LED for both Timer LED and CPU usage LED
  1389. functions. You may choose to use both, but the Timer LED function
  1390. will overrule the CPU usage LED.
  1391. config LEDS_CPU
  1392. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1393. !ARCH_OMAP) \
  1394. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1395. || MACH_OMAP_PERSEUS2
  1396. depends on LEDS
  1397. help
  1398. If you say Y here, the red LED will be used to give a good real
  1399. time indication of CPU usage, by lighting whenever the idle task
  1400. is not currently executing.
  1401. The LART uses the same LED for both Timer LED and CPU usage LED
  1402. functions. You may choose to use both, but the Timer LED function
  1403. will overrule the CPU usage LED.
  1404. config ALIGNMENT_TRAP
  1405. bool
  1406. depends on CPU_CP15_MMU
  1407. default y if !ARCH_EBSA110
  1408. select HAVE_PROC_CPU if PROC_FS
  1409. help
  1410. ARM processors cannot fetch/store information which is not
  1411. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1412. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1413. fetch/store instructions will be emulated in software if you say
  1414. here, which has a severe performance impact. This is necessary for
  1415. correct operation of some network protocols. With an IP-only
  1416. configuration it is safe to say N, otherwise say Y.
  1417. config UACCESS_WITH_MEMCPY
  1418. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1419. depends on MMU && EXPERIMENTAL
  1420. default y if CPU_FEROCEON
  1421. help
  1422. Implement faster copy_to_user and clear_user methods for CPU
  1423. cores where a 8-word STM instruction give significantly higher
  1424. memory write throughput than a sequence of individual 32bit stores.
  1425. A possible side effect is a slight increase in scheduling latency
  1426. between threads sharing the same address space if they invoke
  1427. such copy operations with large buffers.
  1428. However, if the CPU data cache is using a write-allocate mode,
  1429. this option is unlikely to provide any performance gain.
  1430. config SECCOMP
  1431. bool
  1432. prompt "Enable seccomp to safely compute untrusted bytecode"
  1433. ---help---
  1434. This kernel feature is useful for number crunching applications
  1435. that may need to compute untrusted bytecode during their
  1436. execution. By using pipes or other transports made available to
  1437. the process as file descriptors supporting the read/write
  1438. syscalls, it's possible to isolate those applications in
  1439. their own address space using seccomp. Once seccomp is
  1440. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1441. and the task is only allowed to execute a few safe syscalls
  1442. defined by each seccomp mode.
  1443. config CC_STACKPROTECTOR
  1444. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1445. depends on EXPERIMENTAL
  1446. help
  1447. This option turns on the -fstack-protector GCC feature. This
  1448. feature puts, at the beginning of functions, a canary value on
  1449. the stack just before the return address, and validates
  1450. the value just before actually returning. Stack based buffer
  1451. overflows (that need to overwrite this return address) now also
  1452. overwrite the canary, which gets detected and the attack is then
  1453. neutralized via a kernel panic.
  1454. This feature requires gcc version 4.2 or above.
  1455. config DEPRECATED_PARAM_STRUCT
  1456. bool "Provide old way to pass kernel parameters"
  1457. help
  1458. This was deprecated in 2001 and announced to live on for 5 years.
  1459. Some old boot loaders still use this way.
  1460. endmenu
  1461. menu "Boot options"
  1462. config USE_OF
  1463. bool "Flattened Device Tree support"
  1464. select OF
  1465. select OF_EARLY_FLATTREE
  1466. select IRQ_DOMAIN
  1467. help
  1468. Include support for flattened device tree machine descriptions.
  1469. # Compressed boot loader in ROM. Yes, we really want to ask about
  1470. # TEXT and BSS so we preserve their values in the config files.
  1471. config ZBOOT_ROM_TEXT
  1472. hex "Compressed ROM boot loader base address"
  1473. default "0"
  1474. help
  1475. The physical address at which the ROM-able zImage is to be
  1476. placed in the target. Platforms which normally make use of
  1477. ROM-able zImage formats normally set this to a suitable
  1478. value in their defconfig file.
  1479. If ZBOOT_ROM is not enabled, this has no effect.
  1480. config ZBOOT_ROM_BSS
  1481. hex "Compressed ROM boot loader BSS address"
  1482. default "0"
  1483. help
  1484. The base address of an area of read/write memory in the target
  1485. for the ROM-able zImage which must be available while the
  1486. decompressor is running. It must be large enough to hold the
  1487. entire decompressed kernel plus an additional 128 KiB.
  1488. Platforms which normally make use of ROM-able zImage formats
  1489. normally set this to a suitable value in their defconfig file.
  1490. If ZBOOT_ROM is not enabled, this has no effect.
  1491. config ZBOOT_ROM
  1492. bool "Compressed boot loader in ROM/flash"
  1493. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1494. help
  1495. Say Y here if you intend to execute your compressed kernel image
  1496. (zImage) directly from ROM or flash. If unsure, say N.
  1497. choice
  1498. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1499. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1500. default ZBOOT_ROM_NONE
  1501. help
  1502. Include experimental SD/MMC loading code in the ROM-able zImage.
  1503. With this enabled it is possible to write the the ROM-able zImage
  1504. kernel image to an MMC or SD card and boot the kernel straight
  1505. from the reset vector. At reset the processor Mask ROM will load
  1506. the first part of the the ROM-able zImage which in turn loads the
  1507. rest the kernel image to RAM.
  1508. config ZBOOT_ROM_NONE
  1509. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1510. help
  1511. Do not load image from SD or MMC
  1512. config ZBOOT_ROM_MMCIF
  1513. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1514. help
  1515. Load image from MMCIF hardware block.
  1516. config ZBOOT_ROM_SH_MOBILE_SDHI
  1517. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1518. help
  1519. Load image from SDHI hardware block
  1520. endchoice
  1521. config CMDLINE
  1522. string "Default kernel command string"
  1523. default ""
  1524. help
  1525. On some architectures (EBSA110 and CATS), there is currently no way
  1526. for the boot loader to pass arguments to the kernel. For these
  1527. architectures, you should supply some command-line options at build
  1528. time by entering them here. As a minimum, you should specify the
  1529. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1530. choice
  1531. prompt "Kernel command line type" if CMDLINE != ""
  1532. default CMDLINE_FROM_BOOTLOADER
  1533. config CMDLINE_FROM_BOOTLOADER
  1534. bool "Use bootloader kernel arguments if available"
  1535. help
  1536. Uses the command-line options passed by the boot loader. If
  1537. the boot loader doesn't provide any, the default kernel command
  1538. string provided in CMDLINE will be used.
  1539. config CMDLINE_EXTEND
  1540. bool "Extend bootloader kernel arguments"
  1541. help
  1542. The command-line arguments provided by the boot loader will be
  1543. appended to the default kernel command string.
  1544. config CMDLINE_FORCE
  1545. bool "Always use the default kernel command string"
  1546. help
  1547. Always use the default kernel command string, even if the boot
  1548. loader passes other arguments to the kernel.
  1549. This is useful if you cannot or don't want to change the
  1550. command-line options your boot loader passes to the kernel.
  1551. endchoice
  1552. config XIP_KERNEL
  1553. bool "Kernel Execute-In-Place from ROM"
  1554. depends on !ZBOOT_ROM
  1555. help
  1556. Execute-In-Place allows the kernel to run from non-volatile storage
  1557. directly addressable by the CPU, such as NOR flash. This saves RAM
  1558. space since the text section of the kernel is not loaded from flash
  1559. to RAM. Read-write sections, such as the data section and stack,
  1560. are still copied to RAM. The XIP kernel is not compressed since
  1561. it has to run directly from flash, so it will take more space to
  1562. store it. The flash address used to link the kernel object files,
  1563. and for storing it, is configuration dependent. Therefore, if you
  1564. say Y here, you must know the proper physical address where to
  1565. store the kernel image depending on your own flash memory usage.
  1566. Also note that the make target becomes "make xipImage" rather than
  1567. "make zImage" or "make Image". The final kernel binary to put in
  1568. ROM memory will be arch/arm/boot/xipImage.
  1569. If unsure, say N.
  1570. config XIP_PHYS_ADDR
  1571. hex "XIP Kernel Physical Location"
  1572. depends on XIP_KERNEL
  1573. default "0x00080000"
  1574. help
  1575. This is the physical address in your flash memory the kernel will
  1576. be linked for and stored to. This address is dependent on your
  1577. own flash usage.
  1578. config KEXEC
  1579. bool "Kexec system call (EXPERIMENTAL)"
  1580. depends on EXPERIMENTAL
  1581. help
  1582. kexec is a system call that implements the ability to shutdown your
  1583. current kernel, and to start another kernel. It is like a reboot
  1584. but it is independent of the system firmware. And like a reboot
  1585. you can start any kernel with it, not just Linux.
  1586. It is an ongoing process to be certain the hardware in a machine
  1587. is properly shutdown, so do not be surprised if this code does not
  1588. initially work for you. It may help to enable device hotplugging
  1589. support.
  1590. config ATAGS_PROC
  1591. bool "Export atags in procfs"
  1592. depends on KEXEC
  1593. default y
  1594. help
  1595. Should the atags used to boot the kernel be exported in an "atags"
  1596. file in procfs. Useful with kexec.
  1597. config CRASH_DUMP
  1598. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1599. depends on EXPERIMENTAL
  1600. help
  1601. Generate crash dump after being started by kexec. This should
  1602. be normally only set in special crash dump kernels which are
  1603. loaded in the main kernel with kexec-tools into a specially
  1604. reserved region and then later executed after a crash by
  1605. kdump/kexec. The crash dump kernel must be compiled to a
  1606. memory address not used by the main kernel
  1607. For more details see Documentation/kdump/kdump.txt
  1608. config AUTO_ZRELADDR
  1609. bool "Auto calculation of the decompressed kernel image address"
  1610. depends on !ZBOOT_ROM && !ARCH_U300
  1611. help
  1612. ZRELADDR is the physical address where the decompressed kernel
  1613. image will be placed. If AUTO_ZRELADDR is selected, the address
  1614. will be determined at run-time by masking the current IP with
  1615. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1616. from start of memory.
  1617. endmenu
  1618. menu "CPU Power Management"
  1619. if ARCH_HAS_CPUFREQ
  1620. source "drivers/cpufreq/Kconfig"
  1621. config CPU_FREQ_IMX
  1622. tristate "CPUfreq driver for i.MX CPUs"
  1623. depends on ARCH_MXC && CPU_FREQ
  1624. help
  1625. This enables the CPUfreq driver for i.MX CPUs.
  1626. config CPU_FREQ_SA1100
  1627. bool
  1628. config CPU_FREQ_SA1110
  1629. bool
  1630. config CPU_FREQ_INTEGRATOR
  1631. tristate "CPUfreq driver for ARM Integrator CPUs"
  1632. depends on ARCH_INTEGRATOR && CPU_FREQ
  1633. default y
  1634. help
  1635. This enables the CPUfreq driver for ARM Integrator CPUs.
  1636. For details, take a look at <file:Documentation/cpu-freq>.
  1637. If in doubt, say Y.
  1638. config CPU_FREQ_PXA
  1639. bool
  1640. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1641. default y
  1642. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1643. config CPU_FREQ_S3C
  1644. bool
  1645. help
  1646. Internal configuration node for common cpufreq on Samsung SoC
  1647. config CPU_FREQ_S3C24XX
  1648. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1649. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1650. select CPU_FREQ_S3C
  1651. help
  1652. This enables the CPUfreq driver for the Samsung S3C24XX family
  1653. of CPUs.
  1654. For details, take a look at <file:Documentation/cpu-freq>.
  1655. If in doubt, say N.
  1656. config CPU_FREQ_S3C24XX_PLL
  1657. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1658. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1659. help
  1660. Compile in support for changing the PLL frequency from the
  1661. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1662. after a frequency change, so by default it is not enabled.
  1663. This also means that the PLL tables for the selected CPU(s) will
  1664. be built which may increase the size of the kernel image.
  1665. config CPU_FREQ_S3C24XX_DEBUG
  1666. bool "Debug CPUfreq Samsung driver core"
  1667. depends on CPU_FREQ_S3C24XX
  1668. help
  1669. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1670. config CPU_FREQ_S3C24XX_IODEBUG
  1671. bool "Debug CPUfreq Samsung driver IO timing"
  1672. depends on CPU_FREQ_S3C24XX
  1673. help
  1674. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1675. config CPU_FREQ_S3C24XX_DEBUGFS
  1676. bool "Export debugfs for CPUFreq"
  1677. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1678. help
  1679. Export status information via debugfs.
  1680. endif
  1681. source "drivers/cpuidle/Kconfig"
  1682. endmenu
  1683. menu "Floating point emulation"
  1684. comment "At least one emulation must be selected"
  1685. config FPE_NWFPE
  1686. bool "NWFPE math emulation"
  1687. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1688. ---help---
  1689. Say Y to include the NWFPE floating point emulator in the kernel.
  1690. This is necessary to run most binaries. Linux does not currently
  1691. support floating point hardware so you need to say Y here even if
  1692. your machine has an FPA or floating point co-processor podule.
  1693. You may say N here if you are going to load the Acorn FPEmulator
  1694. early in the bootup.
  1695. config FPE_NWFPE_XP
  1696. bool "Support extended precision"
  1697. depends on FPE_NWFPE
  1698. help
  1699. Say Y to include 80-bit support in the kernel floating-point
  1700. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1701. Note that gcc does not generate 80-bit operations by default,
  1702. so in most cases this option only enlarges the size of the
  1703. floating point emulator without any good reason.
  1704. You almost surely want to say N here.
  1705. config FPE_FASTFPE
  1706. bool "FastFPE math emulation (EXPERIMENTAL)"
  1707. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1708. ---help---
  1709. Say Y here to include the FAST floating point emulator in the kernel.
  1710. This is an experimental much faster emulator which now also has full
  1711. precision for the mantissa. It does not support any exceptions.
  1712. It is very simple, and approximately 3-6 times faster than NWFPE.
  1713. It should be sufficient for most programs. It may be not suitable
  1714. for scientific calculations, but you have to check this for yourself.
  1715. If you do not feel you need a faster FP emulation you should better
  1716. choose NWFPE.
  1717. config VFP
  1718. bool "VFP-format floating point maths"
  1719. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1720. help
  1721. Say Y to include VFP support code in the kernel. This is needed
  1722. if your hardware includes a VFP unit.
  1723. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1724. release notes and additional status information.
  1725. Say N if your target does not have VFP hardware.
  1726. config VFPv3
  1727. bool
  1728. depends on VFP
  1729. default y if CPU_V7
  1730. config NEON
  1731. bool "Advanced SIMD (NEON) Extension support"
  1732. depends on VFPv3 && CPU_V7
  1733. help
  1734. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1735. Extension.
  1736. endmenu
  1737. menu "Userspace binary formats"
  1738. source "fs/Kconfig.binfmt"
  1739. config ARTHUR
  1740. tristate "RISC OS personality"
  1741. depends on !AEABI
  1742. help
  1743. Say Y here to include the kernel code necessary if you want to run
  1744. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1745. experimental; if this sounds frightening, say N and sleep in peace.
  1746. You can also say M here to compile this support as a module (which
  1747. will be called arthur).
  1748. endmenu
  1749. menu "Power management options"
  1750. source "kernel/power/Kconfig"
  1751. config ARCH_SUSPEND_POSSIBLE
  1752. depends on !ARCH_S5P64X0 && !ARCH_S5PC100
  1753. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1754. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1755. def_bool y
  1756. endmenu
  1757. source "net/Kconfig"
  1758. source "drivers/Kconfig"
  1759. source "fs/Kconfig"
  1760. source "arch/arm/Kconfig.debug"
  1761. source "security/Kconfig"
  1762. source "crypto/Kconfig"
  1763. source "lib/Kconfig"