Kconfig 65 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 if PCI || ISA || PCMCIA
  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_JUMP_LABEL if !XIP_KERNEL
  13. select HAVE_ARCH_KGDB
  14. select HAVE_KPROBES if !XIP_KERNEL
  15. select HAVE_KRETPROBES if (HAVE_KPROBES)
  16. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  17. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  18. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  19. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  20. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  21. select HAVE_GENERIC_DMA_COHERENT
  22. select HAVE_KERNEL_GZIP
  23. select HAVE_KERNEL_LZO
  24. select HAVE_KERNEL_LZMA
  25. select HAVE_KERNEL_XZ
  26. select HAVE_IRQ_WORK
  27. select HAVE_PERF_EVENTS
  28. select PERF_USE_VMALLOC
  29. select HAVE_REGS_AND_STACK_ACCESS_API
  30. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  31. select HAVE_C_RECORDMCOUNT
  32. select HAVE_GENERIC_HARDIRQS
  33. select GENERIC_IRQ_SHOW
  34. select CPU_PM if (SUSPEND || CPU_IDLE)
  35. select GENERIC_PCI_IOMAP
  36. select HAVE_BPF_JIT if NET
  37. help
  38. The ARM series is a line of low-power-consumption RISC chip designs
  39. licensed by ARM Ltd and targeted at embedded applications and
  40. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  41. manufactured, but legacy ARM-based PC hardware remains popular in
  42. Europe. There is an ARM Linux project with a web page at
  43. <http://www.arm.linux.org.uk/>.
  44. config ARM_HAS_SG_CHAIN
  45. bool
  46. config HAVE_PWM
  47. bool
  48. config MIGHT_HAVE_PCI
  49. bool
  50. config SYS_SUPPORTS_APM_EMULATION
  51. bool
  52. config GENERIC_GPIO
  53. bool
  54. config ARCH_USES_GETTIMEOFFSET
  55. bool
  56. default n
  57. config GENERIC_CLOCKEVENTS
  58. bool
  59. config GENERIC_CLOCKEVENTS_BROADCAST
  60. bool
  61. depends on GENERIC_CLOCKEVENTS
  62. default y if SMP
  63. config KTIME_SCALAR
  64. bool
  65. default y
  66. config HAVE_TCM
  67. bool
  68. select GENERIC_ALLOCATOR
  69. config HAVE_PROC_CPU
  70. bool
  71. config NO_IOPORT
  72. bool
  73. config EISA
  74. bool
  75. ---help---
  76. The Extended Industry Standard Architecture (EISA) bus was
  77. developed as an open alternative to the IBM MicroChannel bus.
  78. The EISA bus provided some of the features of the IBM MicroChannel
  79. bus while maintaining backward compatibility with cards made for
  80. the older ISA bus. The EISA bus saw limited use between 1988 and
  81. 1995 when it was made obsolete by the PCI bus.
  82. Say Y here if you are building a kernel for an EISA-based machine.
  83. Otherwise, say N.
  84. config SBUS
  85. bool
  86. config MCA
  87. bool
  88. help
  89. MicroChannel Architecture is found in some IBM PS/2 machines and
  90. laptops. It is a bus system similar to PCI or ISA. See
  91. <file:Documentation/mca.txt> (and especially the web page given
  92. there) before attempting to build an MCA bus kernel.
  93. config STACKTRACE_SUPPORT
  94. bool
  95. default y
  96. config HAVE_LATENCYTOP_SUPPORT
  97. bool
  98. depends on !SMP
  99. default y
  100. config LOCKDEP_SUPPORT
  101. bool
  102. default y
  103. config TRACE_IRQFLAGS_SUPPORT
  104. bool
  105. default y
  106. config HARDIRQS_SW_RESEND
  107. bool
  108. default y
  109. config GENERIC_IRQ_PROBE
  110. bool
  111. default y
  112. config GENERIC_LOCKBREAK
  113. bool
  114. default y
  115. depends on SMP && PREEMPT
  116. config RWSEM_GENERIC_SPINLOCK
  117. bool
  118. default y
  119. config RWSEM_XCHGADD_ALGORITHM
  120. bool
  121. config ARCH_HAS_ILOG2_U32
  122. bool
  123. config ARCH_HAS_ILOG2_U64
  124. bool
  125. config ARCH_HAS_CPUFREQ
  126. bool
  127. help
  128. Internal node to signify that the ARCH has CPUFREQ support
  129. and that the relevant menu configurations are displayed for
  130. it.
  131. config ARCH_HAS_CPU_IDLE_WAIT
  132. def_bool y
  133. config GENERIC_HWEIGHT
  134. bool
  135. default y
  136. config GENERIC_CALIBRATE_DELAY
  137. bool
  138. default y
  139. config ARCH_MAY_HAVE_PC_FDC
  140. bool
  141. config ZONE_DMA
  142. bool
  143. config NEED_DMA_MAP_STATE
  144. def_bool y
  145. config ARCH_HAS_DMA_SET_COHERENT_MASK
  146. bool
  147. config GENERIC_ISA_DMA
  148. bool
  149. config FIQ
  150. bool
  151. config NEED_RET_TO_USER
  152. bool
  153. config ARCH_MTD_XIP
  154. bool
  155. config VECTORS_BASE
  156. hex
  157. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  158. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  159. default 0x00000000
  160. help
  161. The base address of exception vectors.
  162. config ARM_PATCH_PHYS_VIRT
  163. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  164. default y
  165. depends on !XIP_KERNEL && MMU
  166. depends on !ARCH_REALVIEW || !SPARSEMEM
  167. help
  168. Patch phys-to-virt and virt-to-phys translation functions at
  169. boot and module load time according to the position of the
  170. kernel in system memory.
  171. This can only be used with non-XIP MMU kernels where the base
  172. of physical memory is at a 16MB boundary.
  173. Only disable this option if you know that you do not require
  174. this feature (eg, building a kernel for a single machine) and
  175. you need to shrink the kernel to the minimal size.
  176. config NEED_MACH_IO_H
  177. bool
  178. help
  179. Select this when mach/io.h is required to provide special
  180. definitions for this platform. The need for mach/io.h should
  181. be avoided when possible.
  182. config NEED_MACH_MEMORY_H
  183. bool
  184. help
  185. Select this when mach/memory.h is required to provide special
  186. definitions for this platform. The need for mach/memory.h should
  187. be avoided when possible.
  188. config PHYS_OFFSET
  189. hex "Physical address of main memory" if MMU
  190. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  191. default DRAM_BASE if !MMU
  192. help
  193. Please provide the physical address corresponding to the
  194. location of main memory in your system.
  195. config GENERIC_BUG
  196. def_bool y
  197. depends on BUG
  198. source "init/Kconfig"
  199. source "kernel/Kconfig.freezer"
  200. menu "System Type"
  201. config MMU
  202. bool "MMU-based Paged Memory Management Support"
  203. default y
  204. help
  205. Select if you want MMU-based virtualised addressing space
  206. support by paged memory management. If unsure, say 'Y'.
  207. #
  208. # The "ARM system type" choice list is ordered alphabetically by option
  209. # text. Please add new entries in the option alphabetic order.
  210. #
  211. choice
  212. prompt "ARM system type"
  213. default ARCH_VERSATILE
  214. config ARCH_INTEGRATOR
  215. bool "ARM Ltd. Integrator family"
  216. select ARM_AMBA
  217. select ARCH_HAS_CPUFREQ
  218. select CLKDEV_LOOKUP
  219. select HAVE_MACH_CLKDEV
  220. select HAVE_TCM
  221. select ICST
  222. select GENERIC_CLOCKEVENTS
  223. select PLAT_VERSATILE
  224. select PLAT_VERSATILE_FPGA_IRQ
  225. select NEED_MACH_IO_H
  226. select NEED_MACH_MEMORY_H
  227. select SPARSE_IRQ
  228. help
  229. Support for ARM's Integrator platform.
  230. config ARCH_REALVIEW
  231. bool "ARM Ltd. RealView family"
  232. select ARM_AMBA
  233. select CLKDEV_LOOKUP
  234. select HAVE_MACH_CLKDEV
  235. select ICST
  236. select GENERIC_CLOCKEVENTS
  237. select ARCH_WANT_OPTIONAL_GPIOLIB
  238. select PLAT_VERSATILE
  239. select PLAT_VERSATILE_CLCD
  240. select ARM_TIMER_SP804
  241. select GPIO_PL061 if GPIOLIB
  242. select NEED_MACH_MEMORY_H
  243. help
  244. This enables support for ARM Ltd RealView boards.
  245. config ARCH_VERSATILE
  246. bool "ARM Ltd. Versatile family"
  247. select ARM_AMBA
  248. select ARM_VIC
  249. select CLKDEV_LOOKUP
  250. select HAVE_MACH_CLKDEV
  251. select ICST
  252. select GENERIC_CLOCKEVENTS
  253. select ARCH_WANT_OPTIONAL_GPIOLIB
  254. select PLAT_VERSATILE
  255. select PLAT_VERSATILE_CLCD
  256. select PLAT_VERSATILE_FPGA_IRQ
  257. select ARM_TIMER_SP804
  258. help
  259. This enables support for ARM Ltd Versatile board.
  260. config ARCH_VEXPRESS
  261. bool "ARM Ltd. Versatile Express family"
  262. select ARCH_WANT_OPTIONAL_GPIOLIB
  263. select ARM_AMBA
  264. select ARM_TIMER_SP804
  265. select CLKDEV_LOOKUP
  266. select HAVE_MACH_CLKDEV
  267. select GENERIC_CLOCKEVENTS
  268. select HAVE_CLK
  269. select HAVE_PATA_PLATFORM
  270. select ICST
  271. select NO_IOPORT
  272. select PLAT_VERSATILE
  273. select PLAT_VERSATILE_CLCD
  274. help
  275. This enables support for the ARM Ltd Versatile Express boards.
  276. config ARCH_AT91
  277. bool "Atmel AT91"
  278. select ARCH_REQUIRE_GPIOLIB
  279. select HAVE_CLK
  280. select CLKDEV_LOOKUP
  281. select IRQ_DOMAIN
  282. select NEED_MACH_IO_H if PCCARD
  283. help
  284. This enables support for systems based on the Atmel AT91RM9200,
  285. AT91SAM9 processors.
  286. config ARCH_BCMRING
  287. bool "Broadcom BCMRING"
  288. depends on MMU
  289. select CPU_V6
  290. select ARM_AMBA
  291. select ARM_TIMER_SP804
  292. select CLKDEV_LOOKUP
  293. select GENERIC_CLOCKEVENTS
  294. select ARCH_WANT_OPTIONAL_GPIOLIB
  295. help
  296. Support for Broadcom's BCMRing platform.
  297. config ARCH_HIGHBANK
  298. bool "Calxeda Highbank-based"
  299. select ARCH_WANT_OPTIONAL_GPIOLIB
  300. select ARM_AMBA
  301. select ARM_GIC
  302. select ARM_TIMER_SP804
  303. select CACHE_L2X0
  304. select CLKDEV_LOOKUP
  305. select CPU_V7
  306. select GENERIC_CLOCKEVENTS
  307. select HAVE_ARM_SCU
  308. select HAVE_SMP
  309. select SPARSE_IRQ
  310. select USE_OF
  311. help
  312. Support for the Calxeda Highbank SoC based boards.
  313. config ARCH_CLPS711X
  314. bool "Cirrus Logic CLPS711x/EP721x-based"
  315. select CPU_ARM720T
  316. select ARCH_USES_GETTIMEOFFSET
  317. select NEED_MACH_MEMORY_H
  318. help
  319. Support for Cirrus Logic 711x/721x based boards.
  320. config ARCH_CNS3XXX
  321. bool "Cavium Networks CNS3XXX family"
  322. select CPU_V6K
  323. select GENERIC_CLOCKEVENTS
  324. select ARM_GIC
  325. select MIGHT_HAVE_CACHE_L2X0
  326. select MIGHT_HAVE_PCI
  327. select PCI_DOMAINS if PCI
  328. help
  329. Support for Cavium Networks CNS3XXX platform.
  330. config ARCH_GEMINI
  331. bool "Cortina Systems Gemini"
  332. select CPU_FA526
  333. select ARCH_REQUIRE_GPIOLIB
  334. select ARCH_USES_GETTIMEOFFSET
  335. help
  336. Support for the Cortina Systems Gemini family SoCs
  337. config ARCH_PRIMA2
  338. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  339. select CPU_V7
  340. select NO_IOPORT
  341. select GENERIC_CLOCKEVENTS
  342. select CLKDEV_LOOKUP
  343. select GENERIC_IRQ_CHIP
  344. select MIGHT_HAVE_CACHE_L2X0
  345. select USE_OF
  346. select ZONE_DMA
  347. help
  348. Support for CSR SiRFSoC ARM Cortex A9 Platform
  349. config ARCH_EBSA110
  350. bool "EBSA-110"
  351. select CPU_SA110
  352. select ISA
  353. select NO_IOPORT
  354. select ARCH_USES_GETTIMEOFFSET
  355. select NEED_MACH_IO_H
  356. select NEED_MACH_MEMORY_H
  357. help
  358. This is an evaluation board for the StrongARM processor available
  359. from Digital. It has limited hardware on-board, including an
  360. Ethernet interface, two PCMCIA sockets, two serial ports and a
  361. parallel port.
  362. config ARCH_EP93XX
  363. bool "EP93xx-based"
  364. select CPU_ARM920T
  365. select ARM_AMBA
  366. select ARM_VIC
  367. select CLKDEV_LOOKUP
  368. select ARCH_REQUIRE_GPIOLIB
  369. select ARCH_HAS_HOLES_MEMORYMODEL
  370. select ARCH_USES_GETTIMEOFFSET
  371. select NEED_MACH_MEMORY_H
  372. help
  373. This enables support for the Cirrus EP93xx series of CPUs.
  374. config ARCH_FOOTBRIDGE
  375. bool "FootBridge"
  376. select CPU_SA110
  377. select FOOTBRIDGE
  378. select GENERIC_CLOCKEVENTS
  379. select HAVE_IDE
  380. select NEED_MACH_IO_H
  381. select NEED_MACH_MEMORY_H
  382. help
  383. Support for systems based on the DC21285 companion chip
  384. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  385. config ARCH_MXC
  386. bool "Freescale MXC/iMX-based"
  387. select GENERIC_CLOCKEVENTS
  388. select ARCH_REQUIRE_GPIOLIB
  389. select CLKDEV_LOOKUP
  390. select CLKSRC_MMIO
  391. select GENERIC_IRQ_CHIP
  392. select MULTI_IRQ_HANDLER
  393. help
  394. Support for Freescale MXC/iMX-based family of processors
  395. config ARCH_MXS
  396. bool "Freescale MXS-based"
  397. select GENERIC_CLOCKEVENTS
  398. select ARCH_REQUIRE_GPIOLIB
  399. select CLKDEV_LOOKUP
  400. select CLKSRC_MMIO
  401. select COMMON_CLK
  402. select HAVE_CLK_PREPARE
  403. select PINCTRL
  404. select USE_OF
  405. help
  406. Support for Freescale MXS-based family of processors
  407. config ARCH_NETX
  408. bool "Hilscher NetX based"
  409. select CLKSRC_MMIO
  410. select CPU_ARM926T
  411. select ARM_VIC
  412. select GENERIC_CLOCKEVENTS
  413. help
  414. This enables support for systems based on the Hilscher NetX Soc
  415. config ARCH_H720X
  416. bool "Hynix HMS720x-based"
  417. select CPU_ARM720T
  418. select ISA_DMA_API
  419. select ARCH_USES_GETTIMEOFFSET
  420. help
  421. This enables support for systems based on the Hynix HMS720x
  422. config ARCH_IOP13XX
  423. bool "IOP13xx-based"
  424. depends on MMU
  425. select CPU_XSC3
  426. select PLAT_IOP
  427. select PCI
  428. select ARCH_SUPPORTS_MSI
  429. select VMSPLIT_1G
  430. select NEED_MACH_IO_H
  431. select NEED_MACH_MEMORY_H
  432. select NEED_RET_TO_USER
  433. help
  434. Support for Intel's IOP13XX (XScale) family of processors.
  435. config ARCH_IOP32X
  436. bool "IOP32x-based"
  437. depends on MMU
  438. select CPU_XSCALE
  439. select NEED_MACH_IO_H
  440. select NEED_RET_TO_USER
  441. select PLAT_IOP
  442. select PCI
  443. select ARCH_REQUIRE_GPIOLIB
  444. help
  445. Support for Intel's 80219 and IOP32X (XScale) family of
  446. processors.
  447. config ARCH_IOP33X
  448. bool "IOP33x-based"
  449. depends on MMU
  450. select CPU_XSCALE
  451. select NEED_MACH_IO_H
  452. select NEED_RET_TO_USER
  453. select PLAT_IOP
  454. select PCI
  455. select ARCH_REQUIRE_GPIOLIB
  456. help
  457. Support for Intel's IOP33X (XScale) family of processors.
  458. config ARCH_IXP23XX
  459. bool "IXP23XX-based"
  460. depends on MMU
  461. select CPU_XSC3
  462. select PCI
  463. select ARCH_USES_GETTIMEOFFSET
  464. select NEED_MACH_IO_H
  465. select NEED_MACH_MEMORY_H
  466. help
  467. Support for Intel's IXP23xx (XScale) family of processors.
  468. config ARCH_IXP2000
  469. bool "IXP2400/2800-based"
  470. depends on MMU
  471. select CPU_XSCALE
  472. select PCI
  473. select ARCH_USES_GETTIMEOFFSET
  474. select NEED_MACH_IO_H
  475. select NEED_MACH_MEMORY_H
  476. help
  477. Support for Intel's IXP2400/2800 (XScale) family of processors.
  478. config ARCH_IXP4XX
  479. bool "IXP4xx-based"
  480. depends on MMU
  481. select ARCH_HAS_DMA_SET_COHERENT_MASK
  482. select CLKSRC_MMIO
  483. select CPU_XSCALE
  484. select GENERIC_GPIO
  485. select GENERIC_CLOCKEVENTS
  486. select MIGHT_HAVE_PCI
  487. select NEED_MACH_IO_H
  488. select DMABOUNCE if PCI
  489. help
  490. Support for Intel's IXP4XX (XScale) family of processors.
  491. config ARCH_DOVE
  492. bool "Marvell Dove"
  493. select CPU_V7
  494. select PCI
  495. select ARCH_REQUIRE_GPIOLIB
  496. select GENERIC_CLOCKEVENTS
  497. select NEED_MACH_IO_H
  498. select PLAT_ORION
  499. help
  500. Support for the Marvell Dove SoC 88AP510
  501. config ARCH_KIRKWOOD
  502. bool "Marvell Kirkwood"
  503. select CPU_FEROCEON
  504. select PCI
  505. select ARCH_REQUIRE_GPIOLIB
  506. select GENERIC_CLOCKEVENTS
  507. select NEED_MACH_IO_H
  508. select PLAT_ORION
  509. help
  510. Support for the following Marvell Kirkwood series SoCs:
  511. 88F6180, 88F6192 and 88F6281.
  512. config ARCH_LPC32XX
  513. bool "NXP LPC32XX"
  514. select CLKSRC_MMIO
  515. select CPU_ARM926T
  516. select ARCH_REQUIRE_GPIOLIB
  517. select HAVE_IDE
  518. select ARM_AMBA
  519. select USB_ARCH_HAS_OHCI
  520. select CLKDEV_LOOKUP
  521. select GENERIC_CLOCKEVENTS
  522. help
  523. Support for the NXP LPC32XX family of processors
  524. config ARCH_MV78XX0
  525. bool "Marvell MV78xx0"
  526. select CPU_FEROCEON
  527. select PCI
  528. select ARCH_REQUIRE_GPIOLIB
  529. select GENERIC_CLOCKEVENTS
  530. select NEED_MACH_IO_H
  531. select PLAT_ORION
  532. help
  533. Support for the following Marvell MV78xx0 series SoCs:
  534. MV781x0, MV782x0.
  535. config ARCH_ORION5X
  536. bool "Marvell Orion"
  537. depends on MMU
  538. select CPU_FEROCEON
  539. select PCI
  540. select ARCH_REQUIRE_GPIOLIB
  541. select GENERIC_CLOCKEVENTS
  542. select PLAT_ORION
  543. help
  544. Support for the following Marvell Orion 5x series SoCs:
  545. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  546. Orion-2 (5281), Orion-1-90 (6183).
  547. config ARCH_MMP
  548. bool "Marvell PXA168/910/MMP2"
  549. depends on MMU
  550. select ARCH_REQUIRE_GPIOLIB
  551. select CLKDEV_LOOKUP
  552. select GENERIC_CLOCKEVENTS
  553. select GPIO_PXA
  554. select TICK_ONESHOT
  555. select PLAT_PXA
  556. select SPARSE_IRQ
  557. select GENERIC_ALLOCATOR
  558. help
  559. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  560. config ARCH_KS8695
  561. bool "Micrel/Kendin KS8695"
  562. select CPU_ARM922T
  563. select ARCH_REQUIRE_GPIOLIB
  564. select ARCH_USES_GETTIMEOFFSET
  565. select NEED_MACH_MEMORY_H
  566. help
  567. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  568. System-on-Chip devices.
  569. config ARCH_W90X900
  570. bool "Nuvoton W90X900 CPU"
  571. select CPU_ARM926T
  572. select ARCH_REQUIRE_GPIOLIB
  573. select CLKDEV_LOOKUP
  574. select CLKSRC_MMIO
  575. select GENERIC_CLOCKEVENTS
  576. help
  577. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  578. At present, the w90x900 has been renamed nuc900, regarding
  579. the ARM series product line, you can login the following
  580. link address to know more.
  581. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  582. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  583. config ARCH_TEGRA
  584. bool "NVIDIA Tegra"
  585. select CLKDEV_LOOKUP
  586. select CLKSRC_MMIO
  587. select GENERIC_CLOCKEVENTS
  588. select GENERIC_GPIO
  589. select HAVE_CLK
  590. select HAVE_SMP
  591. select MIGHT_HAVE_CACHE_L2X0
  592. select NEED_MACH_IO_H if PCI
  593. select ARCH_HAS_CPUFREQ
  594. help
  595. This enables support for NVIDIA Tegra based systems (Tegra APX,
  596. Tegra 6xx and Tegra 2 series).
  597. config ARCH_PICOXCELL
  598. bool "Picochip picoXcell"
  599. select ARCH_REQUIRE_GPIOLIB
  600. select ARM_PATCH_PHYS_VIRT
  601. select ARM_VIC
  602. select CPU_V6K
  603. select DW_APB_TIMER
  604. select GENERIC_CLOCKEVENTS
  605. select GENERIC_GPIO
  606. select HAVE_TCM
  607. select NO_IOPORT
  608. select SPARSE_IRQ
  609. select USE_OF
  610. help
  611. This enables support for systems based on the Picochip picoXcell
  612. family of Femtocell devices. The picoxcell support requires device tree
  613. for all boards.
  614. config ARCH_PNX4008
  615. bool "Philips Nexperia PNX4008 Mobile"
  616. select CPU_ARM926T
  617. select CLKDEV_LOOKUP
  618. select ARCH_USES_GETTIMEOFFSET
  619. help
  620. This enables support for Philips PNX4008 mobile platform.
  621. config ARCH_PXA
  622. bool "PXA2xx/PXA3xx-based"
  623. depends on MMU
  624. select ARCH_MTD_XIP
  625. select ARCH_HAS_CPUFREQ
  626. select CLKDEV_LOOKUP
  627. select CLKSRC_MMIO
  628. select ARCH_REQUIRE_GPIOLIB
  629. select GENERIC_CLOCKEVENTS
  630. select GPIO_PXA
  631. select TICK_ONESHOT
  632. select PLAT_PXA
  633. select SPARSE_IRQ
  634. select AUTO_ZRELADDR
  635. select MULTI_IRQ_HANDLER
  636. select ARM_CPU_SUSPEND if PM
  637. select HAVE_IDE
  638. help
  639. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  640. config ARCH_MSM
  641. bool "Qualcomm MSM"
  642. select HAVE_CLK
  643. select GENERIC_CLOCKEVENTS
  644. select ARCH_REQUIRE_GPIOLIB
  645. select CLKDEV_LOOKUP
  646. help
  647. Support for Qualcomm MSM/QSD based systems. This runs on the
  648. apps processor of the MSM/QSD and depends on a shared memory
  649. interface to the modem processor which runs the baseband
  650. stack and controls some vital subsystems
  651. (clock and power control, etc).
  652. config ARCH_SHMOBILE
  653. bool "Renesas SH-Mobile / R-Mobile"
  654. select HAVE_CLK
  655. select CLKDEV_LOOKUP
  656. select HAVE_MACH_CLKDEV
  657. select HAVE_SMP
  658. select GENERIC_CLOCKEVENTS
  659. select MIGHT_HAVE_CACHE_L2X0
  660. select NO_IOPORT
  661. select SPARSE_IRQ
  662. select MULTI_IRQ_HANDLER
  663. select PM_GENERIC_DOMAINS if PM
  664. select NEED_MACH_MEMORY_H
  665. help
  666. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  667. config ARCH_RPC
  668. bool "RiscPC"
  669. select ARCH_ACORN
  670. select FIQ
  671. select ARCH_MAY_HAVE_PC_FDC
  672. select HAVE_PATA_PLATFORM
  673. select ISA_DMA_API
  674. select NO_IOPORT
  675. select ARCH_SPARSEMEM_ENABLE
  676. select ARCH_USES_GETTIMEOFFSET
  677. select HAVE_IDE
  678. select NEED_MACH_IO_H
  679. select NEED_MACH_MEMORY_H
  680. help
  681. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  682. CD-ROM interface, serial and parallel port, and the floppy drive.
  683. config ARCH_SA1100
  684. bool "SA1100-based"
  685. select CLKSRC_MMIO
  686. select CPU_SA1100
  687. select ISA
  688. select ARCH_SPARSEMEM_ENABLE
  689. select ARCH_MTD_XIP
  690. select ARCH_HAS_CPUFREQ
  691. select CPU_FREQ
  692. select GENERIC_CLOCKEVENTS
  693. select CLKDEV_LOOKUP
  694. select TICK_ONESHOT
  695. select ARCH_REQUIRE_GPIOLIB
  696. select HAVE_IDE
  697. select NEED_MACH_MEMORY_H
  698. select SPARSE_IRQ
  699. help
  700. Support for StrongARM 11x0 based boards.
  701. config ARCH_S3C24XX
  702. bool "Samsung S3C24XX SoCs"
  703. select GENERIC_GPIO
  704. select ARCH_HAS_CPUFREQ
  705. select HAVE_CLK
  706. select CLKDEV_LOOKUP
  707. select ARCH_USES_GETTIMEOFFSET
  708. select HAVE_S3C2410_I2C if I2C
  709. select HAVE_S3C_RTC if RTC_CLASS
  710. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  711. select NEED_MACH_IO_H
  712. help
  713. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  714. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  715. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  716. Samsung SMDK2410 development board (and derivatives).
  717. config ARCH_S3C64XX
  718. bool "Samsung S3C64XX"
  719. select PLAT_SAMSUNG
  720. select CPU_V6
  721. select ARM_VIC
  722. select HAVE_CLK
  723. select HAVE_TCM
  724. select CLKDEV_LOOKUP
  725. select NO_IOPORT
  726. select ARCH_USES_GETTIMEOFFSET
  727. select ARCH_HAS_CPUFREQ
  728. select ARCH_REQUIRE_GPIOLIB
  729. select SAMSUNG_CLKSRC
  730. select SAMSUNG_IRQ_VIC_TIMER
  731. select S3C_GPIO_TRACK
  732. select S3C_DEV_NAND
  733. select USB_ARCH_HAS_OHCI
  734. select SAMSUNG_GPIOLIB_4BIT
  735. select HAVE_S3C2410_I2C if I2C
  736. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  737. help
  738. Samsung S3C64XX series based systems
  739. config ARCH_S5P64X0
  740. bool "Samsung S5P6440 S5P6450"
  741. select CPU_V6
  742. select GENERIC_GPIO
  743. select HAVE_CLK
  744. select CLKDEV_LOOKUP
  745. select CLKSRC_MMIO
  746. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  747. select GENERIC_CLOCKEVENTS
  748. select HAVE_S3C2410_I2C if I2C
  749. select HAVE_S3C_RTC if RTC_CLASS
  750. help
  751. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  752. SMDK6450.
  753. config ARCH_S5PC100
  754. bool "Samsung S5PC100"
  755. select GENERIC_GPIO
  756. select HAVE_CLK
  757. select CLKDEV_LOOKUP
  758. select CPU_V7
  759. select ARCH_USES_GETTIMEOFFSET
  760. select HAVE_S3C2410_I2C if I2C
  761. select HAVE_S3C_RTC if RTC_CLASS
  762. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  763. help
  764. Samsung S5PC100 series based systems
  765. config ARCH_S5PV210
  766. bool "Samsung S5PV210/S5PC110"
  767. select CPU_V7
  768. select ARCH_SPARSEMEM_ENABLE
  769. select ARCH_HAS_HOLES_MEMORYMODEL
  770. select GENERIC_GPIO
  771. select HAVE_CLK
  772. select CLKDEV_LOOKUP
  773. select CLKSRC_MMIO
  774. select ARCH_HAS_CPUFREQ
  775. select GENERIC_CLOCKEVENTS
  776. select HAVE_S3C2410_I2C if I2C
  777. select HAVE_S3C_RTC if RTC_CLASS
  778. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  779. select NEED_MACH_MEMORY_H
  780. help
  781. Samsung S5PV210/S5PC110 series based systems
  782. config ARCH_EXYNOS
  783. bool "SAMSUNG EXYNOS"
  784. select CPU_V7
  785. select ARCH_SPARSEMEM_ENABLE
  786. select ARCH_HAS_HOLES_MEMORYMODEL
  787. select GENERIC_GPIO
  788. select HAVE_CLK
  789. select CLKDEV_LOOKUP
  790. select ARCH_HAS_CPUFREQ
  791. select GENERIC_CLOCKEVENTS
  792. select HAVE_S3C_RTC if RTC_CLASS
  793. select HAVE_S3C2410_I2C if I2C
  794. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  795. select NEED_MACH_MEMORY_H
  796. help
  797. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  798. config ARCH_SHARK
  799. bool "Shark"
  800. select CPU_SA110
  801. select ISA
  802. select ISA_DMA
  803. select ZONE_DMA
  804. select PCI
  805. select ARCH_USES_GETTIMEOFFSET
  806. select NEED_MACH_MEMORY_H
  807. select NEED_MACH_IO_H
  808. help
  809. Support for the StrongARM based Digital DNARD machine, also known
  810. as "Shark" (<http://www.shark-linux.de/shark.html>).
  811. config ARCH_U300
  812. bool "ST-Ericsson U300 Series"
  813. depends on MMU
  814. select CLKSRC_MMIO
  815. select CPU_ARM926T
  816. select HAVE_TCM
  817. select ARM_AMBA
  818. select ARM_PATCH_PHYS_VIRT
  819. select ARM_VIC
  820. select GENERIC_CLOCKEVENTS
  821. select CLKDEV_LOOKUP
  822. select HAVE_MACH_CLKDEV
  823. select GENERIC_GPIO
  824. select ARCH_REQUIRE_GPIOLIB
  825. help
  826. Support for ST-Ericsson U300 series mobile platforms.
  827. config ARCH_U8500
  828. bool "ST-Ericsson U8500 Series"
  829. depends on MMU
  830. select CPU_V7
  831. select ARM_AMBA
  832. select GENERIC_CLOCKEVENTS
  833. select CLKDEV_LOOKUP
  834. select ARCH_REQUIRE_GPIOLIB
  835. select ARCH_HAS_CPUFREQ
  836. select HAVE_SMP
  837. select MIGHT_HAVE_CACHE_L2X0
  838. help
  839. Support for ST-Ericsson's Ux500 architecture
  840. config ARCH_NOMADIK
  841. bool "STMicroelectronics Nomadik"
  842. select ARM_AMBA
  843. select ARM_VIC
  844. select CPU_ARM926T
  845. select CLKDEV_LOOKUP
  846. select GENERIC_CLOCKEVENTS
  847. select MIGHT_HAVE_CACHE_L2X0
  848. select ARCH_REQUIRE_GPIOLIB
  849. help
  850. Support for the Nomadik platform by ST-Ericsson
  851. config ARCH_DAVINCI
  852. bool "TI DaVinci"
  853. select GENERIC_CLOCKEVENTS
  854. select ARCH_REQUIRE_GPIOLIB
  855. select ZONE_DMA
  856. select HAVE_IDE
  857. select CLKDEV_LOOKUP
  858. select GENERIC_ALLOCATOR
  859. select GENERIC_IRQ_CHIP
  860. select ARCH_HAS_HOLES_MEMORYMODEL
  861. help
  862. Support for TI's DaVinci platform.
  863. config ARCH_OMAP
  864. bool "TI OMAP"
  865. select HAVE_CLK
  866. select ARCH_REQUIRE_GPIOLIB
  867. select ARCH_HAS_CPUFREQ
  868. select CLKSRC_MMIO
  869. select GENERIC_CLOCKEVENTS
  870. select ARCH_HAS_HOLES_MEMORYMODEL
  871. help
  872. Support for TI's OMAP platform (OMAP1/2/3/4).
  873. config PLAT_SPEAR
  874. bool "ST SPEAr"
  875. select ARM_AMBA
  876. select ARCH_REQUIRE_GPIOLIB
  877. select CLKDEV_LOOKUP
  878. select CLKSRC_MMIO
  879. select GENERIC_CLOCKEVENTS
  880. select HAVE_CLK
  881. help
  882. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  883. config ARCH_VT8500
  884. bool "VIA/WonderMedia 85xx"
  885. select CPU_ARM926T
  886. select GENERIC_GPIO
  887. select ARCH_HAS_CPUFREQ
  888. select GENERIC_CLOCKEVENTS
  889. select ARCH_REQUIRE_GPIOLIB
  890. select HAVE_PWM
  891. help
  892. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  893. config ARCH_ZYNQ
  894. bool "Xilinx Zynq ARM Cortex A9 Platform"
  895. select CPU_V7
  896. select GENERIC_CLOCKEVENTS
  897. select CLKDEV_LOOKUP
  898. select ARM_GIC
  899. select ARM_AMBA
  900. select ICST
  901. select MIGHT_HAVE_CACHE_L2X0
  902. select USE_OF
  903. help
  904. Support for Xilinx Zynq ARM Cortex A9 Platform
  905. endchoice
  906. #
  907. # This is sorted alphabetically by mach-* pathname. However, plat-*
  908. # Kconfigs may be included either alphabetically (according to the
  909. # plat- suffix) or along side the corresponding mach-* source.
  910. #
  911. source "arch/arm/mach-at91/Kconfig"
  912. source "arch/arm/mach-bcmring/Kconfig"
  913. source "arch/arm/mach-clps711x/Kconfig"
  914. source "arch/arm/mach-cns3xxx/Kconfig"
  915. source "arch/arm/mach-davinci/Kconfig"
  916. source "arch/arm/mach-dove/Kconfig"
  917. source "arch/arm/mach-ep93xx/Kconfig"
  918. source "arch/arm/mach-footbridge/Kconfig"
  919. source "arch/arm/mach-gemini/Kconfig"
  920. source "arch/arm/mach-h720x/Kconfig"
  921. source "arch/arm/mach-integrator/Kconfig"
  922. source "arch/arm/mach-iop32x/Kconfig"
  923. source "arch/arm/mach-iop33x/Kconfig"
  924. source "arch/arm/mach-iop13xx/Kconfig"
  925. source "arch/arm/mach-ixp4xx/Kconfig"
  926. source "arch/arm/mach-ixp2000/Kconfig"
  927. source "arch/arm/mach-ixp23xx/Kconfig"
  928. source "arch/arm/mach-kirkwood/Kconfig"
  929. source "arch/arm/mach-ks8695/Kconfig"
  930. source "arch/arm/mach-lpc32xx/Kconfig"
  931. source "arch/arm/mach-msm/Kconfig"
  932. source "arch/arm/mach-mv78xx0/Kconfig"
  933. source "arch/arm/plat-mxc/Kconfig"
  934. source "arch/arm/mach-mxs/Kconfig"
  935. source "arch/arm/mach-netx/Kconfig"
  936. source "arch/arm/mach-nomadik/Kconfig"
  937. source "arch/arm/plat-nomadik/Kconfig"
  938. source "arch/arm/plat-omap/Kconfig"
  939. source "arch/arm/mach-omap1/Kconfig"
  940. source "arch/arm/mach-omap2/Kconfig"
  941. source "arch/arm/mach-orion5x/Kconfig"
  942. source "arch/arm/mach-pxa/Kconfig"
  943. source "arch/arm/plat-pxa/Kconfig"
  944. source "arch/arm/mach-mmp/Kconfig"
  945. source "arch/arm/mach-realview/Kconfig"
  946. source "arch/arm/mach-sa1100/Kconfig"
  947. source "arch/arm/plat-samsung/Kconfig"
  948. source "arch/arm/plat-s3c24xx/Kconfig"
  949. source "arch/arm/plat-s5p/Kconfig"
  950. source "arch/arm/plat-spear/Kconfig"
  951. source "arch/arm/mach-s3c24xx/Kconfig"
  952. if ARCH_S3C24XX
  953. source "arch/arm/mach-s3c2412/Kconfig"
  954. source "arch/arm/mach-s3c2440/Kconfig"
  955. endif
  956. if ARCH_S3C64XX
  957. source "arch/arm/mach-s3c64xx/Kconfig"
  958. endif
  959. source "arch/arm/mach-s5p64x0/Kconfig"
  960. source "arch/arm/mach-s5pc100/Kconfig"
  961. source "arch/arm/mach-s5pv210/Kconfig"
  962. source "arch/arm/mach-exynos/Kconfig"
  963. source "arch/arm/mach-shmobile/Kconfig"
  964. source "arch/arm/mach-tegra/Kconfig"
  965. source "arch/arm/mach-u300/Kconfig"
  966. source "arch/arm/mach-ux500/Kconfig"
  967. source "arch/arm/mach-versatile/Kconfig"
  968. source "arch/arm/mach-vexpress/Kconfig"
  969. source "arch/arm/plat-versatile/Kconfig"
  970. source "arch/arm/mach-vt8500/Kconfig"
  971. source "arch/arm/mach-w90x900/Kconfig"
  972. # Definitions to make life easier
  973. config ARCH_ACORN
  974. bool
  975. config PLAT_IOP
  976. bool
  977. select GENERIC_CLOCKEVENTS
  978. config PLAT_ORION
  979. bool
  980. select CLKSRC_MMIO
  981. select GENERIC_IRQ_CHIP
  982. config PLAT_PXA
  983. bool
  984. config PLAT_VERSATILE
  985. bool
  986. config ARM_TIMER_SP804
  987. bool
  988. select CLKSRC_MMIO
  989. select HAVE_SCHED_CLOCK
  990. source arch/arm/mm/Kconfig
  991. config ARM_NR_BANKS
  992. int
  993. default 16 if ARCH_EP93XX
  994. default 8
  995. config IWMMXT
  996. bool "Enable iWMMXt support"
  997. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  998. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  999. help
  1000. Enable support for iWMMXt context switching at run time if
  1001. running on a CPU that supports it.
  1002. config XSCALE_PMU
  1003. bool
  1004. depends on CPU_XSCALE
  1005. default y
  1006. config CPU_HAS_PMU
  1007. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  1008. (!ARCH_OMAP3 || OMAP3_EMU)
  1009. default y
  1010. bool
  1011. config MULTI_IRQ_HANDLER
  1012. bool
  1013. help
  1014. Allow each machine to specify it's own IRQ handler at run time.
  1015. if !MMU
  1016. source "arch/arm/Kconfig-nommu"
  1017. endif
  1018. config ARM_ERRATA_326103
  1019. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1020. depends on CPU_V6
  1021. help
  1022. Executing a SWP instruction to read-only memory does not set bit 11
  1023. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1024. treat the access as a read, preventing a COW from occurring and
  1025. causing the faulting task to livelock.
  1026. config ARM_ERRATA_411920
  1027. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1028. depends on CPU_V6 || CPU_V6K
  1029. help
  1030. Invalidation of the Instruction Cache operation can
  1031. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1032. It does not affect the MPCore. This option enables the ARM Ltd.
  1033. recommended workaround.
  1034. config ARM_ERRATA_430973
  1035. bool "ARM errata: Stale prediction on replaced interworking branch"
  1036. depends on CPU_V7
  1037. help
  1038. This option enables the workaround for the 430973 Cortex-A8
  1039. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1040. interworking branch is replaced with another code sequence at the
  1041. same virtual address, whether due to self-modifying code or virtual
  1042. to physical address re-mapping, Cortex-A8 does not recover from the
  1043. stale interworking branch prediction. This results in Cortex-A8
  1044. executing the new code sequence in the incorrect ARM or Thumb state.
  1045. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1046. and also flushes the branch target cache at every context switch.
  1047. Note that setting specific bits in the ACTLR register may not be
  1048. available in non-secure mode.
  1049. config ARM_ERRATA_458693
  1050. bool "ARM errata: Processor deadlock when a false hazard is created"
  1051. depends on CPU_V7
  1052. help
  1053. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1054. erratum. For very specific sequences of memory operations, it is
  1055. possible for a hazard condition intended for a cache line to instead
  1056. be incorrectly associated with a different cache line. This false
  1057. hazard might then cause a processor deadlock. The workaround enables
  1058. the L1 caching of the NEON accesses and disables the PLD instruction
  1059. in the ACTLR register. Note that setting specific bits in the ACTLR
  1060. register may not be available in non-secure mode.
  1061. config ARM_ERRATA_460075
  1062. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1063. depends on CPU_V7
  1064. help
  1065. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1066. erratum. Any asynchronous access to the L2 cache may encounter a
  1067. situation in which recent store transactions to the L2 cache are lost
  1068. and overwritten with stale memory contents from external memory. The
  1069. workaround disables the write-allocate mode for the L2 cache via the
  1070. ACTLR register. Note that setting specific bits in the ACTLR register
  1071. may not be available in non-secure mode.
  1072. config ARM_ERRATA_742230
  1073. bool "ARM errata: DMB operation may be faulty"
  1074. depends on CPU_V7 && SMP
  1075. help
  1076. This option enables the workaround for the 742230 Cortex-A9
  1077. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1078. between two write operations may not ensure the correct visibility
  1079. ordering of the two writes. This workaround sets a specific bit in
  1080. the diagnostic register of the Cortex-A9 which causes the DMB
  1081. instruction to behave as a DSB, ensuring the correct behaviour of
  1082. the two writes.
  1083. config ARM_ERRATA_742231
  1084. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1085. depends on CPU_V7 && SMP
  1086. help
  1087. This option enables the workaround for the 742231 Cortex-A9
  1088. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1089. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1090. accessing some data located in the same cache line, may get corrupted
  1091. data due to bad handling of the address hazard when the line gets
  1092. replaced from one of the CPUs at the same time as another CPU is
  1093. accessing it. This workaround sets specific bits in the diagnostic
  1094. register of the Cortex-A9 which reduces the linefill issuing
  1095. capabilities of the processor.
  1096. config PL310_ERRATA_588369
  1097. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1098. depends on CACHE_L2X0
  1099. help
  1100. The PL310 L2 cache controller implements three types of Clean &
  1101. Invalidate maintenance operations: by Physical Address
  1102. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1103. They are architecturally defined to behave as the execution of a
  1104. clean operation followed immediately by an invalidate operation,
  1105. both performing to the same memory location. This functionality
  1106. is not correctly implemented in PL310 as clean lines are not
  1107. invalidated as a result of these operations.
  1108. config ARM_ERRATA_720789
  1109. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1110. depends on CPU_V7
  1111. help
  1112. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1113. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1114. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1115. As a consequence of this erratum, some TLB entries which should be
  1116. invalidated are not, resulting in an incoherency in the system page
  1117. tables. The workaround changes the TLB flushing routines to invalidate
  1118. entries regardless of the ASID.
  1119. config PL310_ERRATA_727915
  1120. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1121. depends on CACHE_L2X0
  1122. help
  1123. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1124. operation (offset 0x7FC). This operation runs in background so that
  1125. PL310 can handle normal accesses while it is in progress. Under very
  1126. rare circumstances, due to this erratum, write data can be lost when
  1127. PL310 treats a cacheable write transaction during a Clean &
  1128. Invalidate by Way operation.
  1129. config ARM_ERRATA_743622
  1130. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1131. depends on CPU_V7
  1132. help
  1133. This option enables the workaround for the 743622 Cortex-A9
  1134. (r2p*) erratum. Under very rare conditions, a faulty
  1135. optimisation in the Cortex-A9 Store Buffer may lead to data
  1136. corruption. This workaround sets a specific bit in the diagnostic
  1137. register of the Cortex-A9 which disables the Store Buffer
  1138. optimisation, preventing the defect from occurring. This has no
  1139. visible impact on the overall performance or power consumption of the
  1140. processor.
  1141. config ARM_ERRATA_751472
  1142. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1143. depends on CPU_V7
  1144. help
  1145. This option enables the workaround for the 751472 Cortex-A9 (prior
  1146. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1147. completion of a following broadcasted operation if the second
  1148. operation is received by a CPU before the ICIALLUIS has completed,
  1149. potentially leading to corrupted entries in the cache or TLB.
  1150. config PL310_ERRATA_753970
  1151. bool "PL310 errata: cache sync operation may be faulty"
  1152. depends on CACHE_PL310
  1153. help
  1154. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1155. Under some condition the effect of cache sync operation on
  1156. the store buffer still remains when the operation completes.
  1157. This means that the store buffer is always asked to drain and
  1158. this prevents it from merging any further writes. The workaround
  1159. is to replace the normal offset of cache sync operation (0x730)
  1160. by another offset targeting an unmapped PL310 register 0x740.
  1161. This has the same effect as the cache sync operation: store buffer
  1162. drain and waiting for all buffers empty.
  1163. config ARM_ERRATA_754322
  1164. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1165. depends on CPU_V7
  1166. help
  1167. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1168. r3p*) erratum. A speculative memory access may cause a page table walk
  1169. which starts prior to an ASID switch but completes afterwards. This
  1170. can populate the micro-TLB with a stale entry which may be hit with
  1171. the new ASID. This workaround places two dsb instructions in the mm
  1172. switching code so that no page table walks can cross the ASID switch.
  1173. config ARM_ERRATA_754327
  1174. bool "ARM errata: no automatic Store Buffer drain"
  1175. depends on CPU_V7 && SMP
  1176. help
  1177. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1178. r2p0) erratum. The Store Buffer does not have any automatic draining
  1179. mechanism and therefore a livelock may occur if an external agent
  1180. continuously polls a memory location waiting to observe an update.
  1181. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1182. written polling loops from denying visibility of updates to memory.
  1183. config ARM_ERRATA_364296
  1184. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1185. depends on CPU_V6 && !SMP
  1186. help
  1187. This options enables the workaround for the 364296 ARM1136
  1188. r0p2 erratum (possible cache data corruption with
  1189. hit-under-miss enabled). It sets the undocumented bit 31 in
  1190. the auxiliary control register and the FI bit in the control
  1191. register, thus disabling hit-under-miss without putting the
  1192. processor into full low interrupt latency mode. ARM11MPCore
  1193. is not affected.
  1194. config ARM_ERRATA_764369
  1195. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1196. depends on CPU_V7 && SMP
  1197. help
  1198. This option enables the workaround for erratum 764369
  1199. affecting Cortex-A9 MPCore with two or more processors (all
  1200. current revisions). Under certain timing circumstances, a data
  1201. cache line maintenance operation by MVA targeting an Inner
  1202. Shareable memory region may fail to proceed up to either the
  1203. Point of Coherency or to the Point of Unification of the
  1204. system. This workaround adds a DSB instruction before the
  1205. relevant cache maintenance functions and sets a specific bit
  1206. in the diagnostic control register of the SCU.
  1207. config PL310_ERRATA_769419
  1208. bool "PL310 errata: no automatic Store Buffer drain"
  1209. depends on CACHE_L2X0
  1210. help
  1211. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1212. not automatically drain. This can cause normal, non-cacheable
  1213. writes to be retained when the memory system is idle, leading
  1214. to suboptimal I/O performance for drivers using coherent DMA.
  1215. This option adds a write barrier to the cpu_idle loop so that,
  1216. on systems with an outer cache, the store buffer is drained
  1217. explicitly.
  1218. endmenu
  1219. source "arch/arm/common/Kconfig"
  1220. menu "Bus support"
  1221. config ARM_AMBA
  1222. bool
  1223. config ISA
  1224. bool
  1225. help
  1226. Find out whether you have ISA slots on your motherboard. ISA is the
  1227. name of a bus system, i.e. the way the CPU talks to the other stuff
  1228. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1229. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1230. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1231. # Select ISA DMA controller support
  1232. config ISA_DMA
  1233. bool
  1234. select ISA_DMA_API
  1235. # Select ISA DMA interface
  1236. config ISA_DMA_API
  1237. bool
  1238. config PCI
  1239. bool "PCI support" if MIGHT_HAVE_PCI
  1240. help
  1241. Find out whether you have a PCI motherboard. PCI is the name of a
  1242. bus system, i.e. the way the CPU talks to the other stuff inside
  1243. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1244. VESA. If you have PCI, say Y, otherwise N.
  1245. config PCI_DOMAINS
  1246. bool
  1247. depends on PCI
  1248. config PCI_NANOENGINE
  1249. bool "BSE nanoEngine PCI support"
  1250. depends on SA1100_NANOENGINE
  1251. help
  1252. Enable PCI on the BSE nanoEngine board.
  1253. config PCI_SYSCALL
  1254. def_bool PCI
  1255. # Select the host bridge type
  1256. config PCI_HOST_VIA82C505
  1257. bool
  1258. depends on PCI && ARCH_SHARK
  1259. default y
  1260. config PCI_HOST_ITE8152
  1261. bool
  1262. depends on PCI && MACH_ARMCORE
  1263. default y
  1264. select DMABOUNCE
  1265. source "drivers/pci/Kconfig"
  1266. source "drivers/pcmcia/Kconfig"
  1267. endmenu
  1268. menu "Kernel Features"
  1269. source "kernel/time/Kconfig"
  1270. config HAVE_SMP
  1271. bool
  1272. help
  1273. This option should be selected by machines which have an SMP-
  1274. capable CPU.
  1275. The only effect of this option is to make the SMP-related
  1276. options available to the user for configuration.
  1277. config SMP
  1278. bool "Symmetric Multi-Processing"
  1279. depends on CPU_V6K || CPU_V7
  1280. depends on GENERIC_CLOCKEVENTS
  1281. depends on HAVE_SMP
  1282. depends on MMU
  1283. select USE_GENERIC_SMP_HELPERS
  1284. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1285. help
  1286. This enables support for systems with more than one CPU. If you have
  1287. a system with only one CPU, like most personal computers, say N. If
  1288. you have a system with more than one CPU, say Y.
  1289. If you say N here, the kernel will run on single and multiprocessor
  1290. machines, but will use only one CPU of a multiprocessor machine. If
  1291. you say Y here, the kernel will run on many, but not all, single
  1292. processor machines. On a single processor machine, the kernel will
  1293. run faster if you say N here.
  1294. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1295. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1296. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1297. If you don't know what to do here, say N.
  1298. config SMP_ON_UP
  1299. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1300. depends on EXPERIMENTAL
  1301. depends on SMP && !XIP_KERNEL
  1302. default y
  1303. help
  1304. SMP kernels contain instructions which fail on non-SMP processors.
  1305. Enabling this option allows the kernel to modify itself to make
  1306. these instructions safe. Disabling it allows about 1K of space
  1307. savings.
  1308. If you don't know what to do here, say Y.
  1309. config ARM_CPU_TOPOLOGY
  1310. bool "Support cpu topology definition"
  1311. depends on SMP && CPU_V7
  1312. default y
  1313. help
  1314. Support ARM cpu topology definition. The MPIDR register defines
  1315. affinity between processors which is then used to describe the cpu
  1316. topology of an ARM System.
  1317. config SCHED_MC
  1318. bool "Multi-core scheduler support"
  1319. depends on ARM_CPU_TOPOLOGY
  1320. help
  1321. Multi-core scheduler support improves the CPU scheduler's decision
  1322. making when dealing with multi-core CPU chips at a cost of slightly
  1323. increased overhead in some places. If unsure say N here.
  1324. config SCHED_SMT
  1325. bool "SMT scheduler support"
  1326. depends on ARM_CPU_TOPOLOGY
  1327. help
  1328. Improves the CPU scheduler's decision making when dealing with
  1329. MultiThreading at a cost of slightly increased overhead in some
  1330. places. If unsure say N here.
  1331. config HAVE_ARM_SCU
  1332. bool
  1333. help
  1334. This option enables support for the ARM system coherency unit
  1335. config HAVE_ARM_TWD
  1336. bool
  1337. depends on SMP
  1338. select TICK_ONESHOT
  1339. help
  1340. This options enables support for the ARM timer and watchdog unit
  1341. choice
  1342. prompt "Memory split"
  1343. default VMSPLIT_3G
  1344. help
  1345. Select the desired split between kernel and user memory.
  1346. If you are not absolutely sure what you are doing, leave this
  1347. option alone!
  1348. config VMSPLIT_3G
  1349. bool "3G/1G user/kernel split"
  1350. config VMSPLIT_2G
  1351. bool "2G/2G user/kernel split"
  1352. config VMSPLIT_1G
  1353. bool "1G/3G user/kernel split"
  1354. endchoice
  1355. config PAGE_OFFSET
  1356. hex
  1357. default 0x40000000 if VMSPLIT_1G
  1358. default 0x80000000 if VMSPLIT_2G
  1359. default 0xC0000000
  1360. config NR_CPUS
  1361. int "Maximum number of CPUs (2-32)"
  1362. range 2 32
  1363. depends on SMP
  1364. default "4"
  1365. config HOTPLUG_CPU
  1366. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1367. depends on SMP && HOTPLUG && EXPERIMENTAL
  1368. help
  1369. Say Y here to experiment with turning CPUs off and on. CPUs
  1370. can be controlled through /sys/devices/system/cpu.
  1371. config LOCAL_TIMERS
  1372. bool "Use local timer interrupts"
  1373. depends on SMP
  1374. default y
  1375. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1376. help
  1377. Enable support for local timers on SMP platforms, rather then the
  1378. legacy IPI broadcast method. Local timers allows the system
  1379. accounting to be spread across the timer interval, preventing a
  1380. "thundering herd" at every timer tick.
  1381. config ARCH_NR_GPIO
  1382. int
  1383. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1384. default 355 if ARCH_U8500
  1385. default 264 if MACH_H4700
  1386. default 0
  1387. help
  1388. Maximum number of GPIOs in the system.
  1389. If unsure, leave the default value.
  1390. source kernel/Kconfig.preempt
  1391. config HZ
  1392. int
  1393. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1394. ARCH_S5PV210 || ARCH_EXYNOS4
  1395. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1396. default AT91_TIMER_HZ if ARCH_AT91
  1397. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1398. default 100
  1399. config THUMB2_KERNEL
  1400. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1401. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1402. select AEABI
  1403. select ARM_ASM_UNIFIED
  1404. select ARM_UNWIND
  1405. help
  1406. By enabling this option, the kernel will be compiled in
  1407. Thumb-2 mode. A compiler/assembler that understand the unified
  1408. ARM-Thumb syntax is needed.
  1409. If unsure, say N.
  1410. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1411. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1412. depends on THUMB2_KERNEL && MODULES
  1413. default y
  1414. help
  1415. Various binutils versions can resolve Thumb-2 branches to
  1416. locally-defined, preemptible global symbols as short-range "b.n"
  1417. branch instructions.
  1418. This is a problem, because there's no guarantee the final
  1419. destination of the symbol, or any candidate locations for a
  1420. trampoline, are within range of the branch. For this reason, the
  1421. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1422. relocation in modules at all, and it makes little sense to add
  1423. support.
  1424. The symptom is that the kernel fails with an "unsupported
  1425. relocation" error when loading some modules.
  1426. Until fixed tools are available, passing
  1427. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1428. code which hits this problem, at the cost of a bit of extra runtime
  1429. stack usage in some cases.
  1430. The problem is described in more detail at:
  1431. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1432. Only Thumb-2 kernels are affected.
  1433. Unless you are sure your tools don't have this problem, say Y.
  1434. config ARM_ASM_UNIFIED
  1435. bool
  1436. config AEABI
  1437. bool "Use the ARM EABI to compile the kernel"
  1438. help
  1439. This option allows for the kernel to be compiled using the latest
  1440. ARM ABI (aka EABI). This is only useful if you are using a user
  1441. space environment that is also compiled with EABI.
  1442. Since there are major incompatibilities between the legacy ABI and
  1443. EABI, especially with regard to structure member alignment, this
  1444. option also changes the kernel syscall calling convention to
  1445. disambiguate both ABIs and allow for backward compatibility support
  1446. (selected with CONFIG_OABI_COMPAT).
  1447. To use this you need GCC version 4.0.0 or later.
  1448. config OABI_COMPAT
  1449. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1450. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1451. default y
  1452. help
  1453. This option preserves the old syscall interface along with the
  1454. new (ARM EABI) one. It also provides a compatibility layer to
  1455. intercept syscalls that have structure arguments which layout
  1456. in memory differs between the legacy ABI and the new ARM EABI
  1457. (only for non "thumb" binaries). This option adds a tiny
  1458. overhead to all syscalls and produces a slightly larger kernel.
  1459. If you know you'll be using only pure EABI user space then you
  1460. can say N here. If this option is not selected and you attempt
  1461. to execute a legacy ABI binary then the result will be
  1462. UNPREDICTABLE (in fact it can be predicted that it won't work
  1463. at all). If in doubt say Y.
  1464. config ARCH_HAS_HOLES_MEMORYMODEL
  1465. bool
  1466. config ARCH_SPARSEMEM_ENABLE
  1467. bool
  1468. config ARCH_SPARSEMEM_DEFAULT
  1469. def_bool ARCH_SPARSEMEM_ENABLE
  1470. config ARCH_SELECT_MEMORY_MODEL
  1471. def_bool ARCH_SPARSEMEM_ENABLE
  1472. config HAVE_ARCH_PFN_VALID
  1473. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1474. config HIGHMEM
  1475. bool "High Memory Support"
  1476. depends on MMU
  1477. help
  1478. The address space of ARM processors is only 4 Gigabytes large
  1479. and it has to accommodate user address space, kernel address
  1480. space as well as some memory mapped IO. That means that, if you
  1481. have a large amount of physical memory and/or IO, not all of the
  1482. memory can be "permanently mapped" by the kernel. The physical
  1483. memory that is not permanently mapped is called "high memory".
  1484. Depending on the selected kernel/user memory split, minimum
  1485. vmalloc space and actual amount of RAM, you may not need this
  1486. option which should result in a slightly faster kernel.
  1487. If unsure, say n.
  1488. config HIGHPTE
  1489. bool "Allocate 2nd-level pagetables from highmem"
  1490. depends on HIGHMEM
  1491. config HW_PERF_EVENTS
  1492. bool "Enable hardware performance counter support for perf events"
  1493. depends on PERF_EVENTS && CPU_HAS_PMU
  1494. default y
  1495. help
  1496. Enable hardware performance counter support for perf events. If
  1497. disabled, perf events will use software events only.
  1498. source "mm/Kconfig"
  1499. config FORCE_MAX_ZONEORDER
  1500. int "Maximum zone order" if ARCH_SHMOBILE
  1501. range 11 64 if ARCH_SHMOBILE
  1502. default "9" if SA1111
  1503. default "11"
  1504. help
  1505. The kernel memory allocator divides physically contiguous memory
  1506. blocks into "zones", where each zone is a power of two number of
  1507. pages. This option selects the largest power of two that the kernel
  1508. keeps in the memory allocator. If you need to allocate very large
  1509. blocks of physically contiguous memory, then you may need to
  1510. increase this value.
  1511. This config option is actually maximum order plus one. For example,
  1512. a value of 11 means that the largest free memory block is 2^10 pages.
  1513. config LEDS
  1514. bool "Timer and CPU usage LEDs"
  1515. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1516. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1517. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1518. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1519. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1520. ARCH_AT91 || ARCH_DAVINCI || \
  1521. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1522. help
  1523. If you say Y here, the LEDs on your machine will be used
  1524. to provide useful information about your current system status.
  1525. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1526. be able to select which LEDs are active using the options below. If
  1527. you are compiling a kernel for the EBSA-110 or the LART however, the
  1528. red LED will simply flash regularly to indicate that the system is
  1529. still functional. It is safe to say Y here if you have a CATS
  1530. system, but the driver will do nothing.
  1531. config LEDS_TIMER
  1532. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1533. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1534. || MACH_OMAP_PERSEUS2
  1535. depends on LEDS
  1536. depends on !GENERIC_CLOCKEVENTS
  1537. default y if ARCH_EBSA110
  1538. help
  1539. If you say Y here, one of the system LEDs (the green one on the
  1540. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1541. will flash regularly to indicate that the system is still
  1542. operational. This is mainly useful to kernel hackers who are
  1543. debugging unstable kernels.
  1544. The LART uses the same LED for both Timer LED and CPU usage LED
  1545. functions. You may choose to use both, but the Timer LED function
  1546. will overrule the CPU usage LED.
  1547. config LEDS_CPU
  1548. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1549. !ARCH_OMAP) \
  1550. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1551. || MACH_OMAP_PERSEUS2
  1552. depends on LEDS
  1553. help
  1554. If you say Y here, the red LED will be used to give a good real
  1555. time indication of CPU usage, by lighting whenever the idle task
  1556. is not currently executing.
  1557. The LART uses the same LED for both Timer LED and CPU usage LED
  1558. functions. You may choose to use both, but the Timer LED function
  1559. will overrule the CPU usage LED.
  1560. config ALIGNMENT_TRAP
  1561. bool
  1562. depends on CPU_CP15_MMU
  1563. default y if !ARCH_EBSA110
  1564. select HAVE_PROC_CPU if PROC_FS
  1565. help
  1566. ARM processors cannot fetch/store information which is not
  1567. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1568. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1569. fetch/store instructions will be emulated in software if you say
  1570. here, which has a severe performance impact. This is necessary for
  1571. correct operation of some network protocols. With an IP-only
  1572. configuration it is safe to say N, otherwise say Y.
  1573. config UACCESS_WITH_MEMCPY
  1574. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1575. depends on MMU && EXPERIMENTAL
  1576. default y if CPU_FEROCEON
  1577. help
  1578. Implement faster copy_to_user and clear_user methods for CPU
  1579. cores where a 8-word STM instruction give significantly higher
  1580. memory write throughput than a sequence of individual 32bit stores.
  1581. A possible side effect is a slight increase in scheduling latency
  1582. between threads sharing the same address space if they invoke
  1583. such copy operations with large buffers.
  1584. However, if the CPU data cache is using a write-allocate mode,
  1585. this option is unlikely to provide any performance gain.
  1586. config SECCOMP
  1587. bool
  1588. prompt "Enable seccomp to safely compute untrusted bytecode"
  1589. ---help---
  1590. This kernel feature is useful for number crunching applications
  1591. that may need to compute untrusted bytecode during their
  1592. execution. By using pipes or other transports made available to
  1593. the process as file descriptors supporting the read/write
  1594. syscalls, it's possible to isolate those applications in
  1595. their own address space using seccomp. Once seccomp is
  1596. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1597. and the task is only allowed to execute a few safe syscalls
  1598. defined by each seccomp mode.
  1599. config CC_STACKPROTECTOR
  1600. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1601. depends on EXPERIMENTAL
  1602. help
  1603. This option turns on the -fstack-protector GCC feature. This
  1604. feature puts, at the beginning of functions, a canary value on
  1605. the stack just before the return address, and validates
  1606. the value just before actually returning. Stack based buffer
  1607. overflows (that need to overwrite this return address) now also
  1608. overwrite the canary, which gets detected and the attack is then
  1609. neutralized via a kernel panic.
  1610. This feature requires gcc version 4.2 or above.
  1611. config DEPRECATED_PARAM_STRUCT
  1612. bool "Provide old way to pass kernel parameters"
  1613. help
  1614. This was deprecated in 2001 and announced to live on for 5 years.
  1615. Some old boot loaders still use this way.
  1616. endmenu
  1617. menu "Boot options"
  1618. config USE_OF
  1619. bool "Flattened Device Tree support"
  1620. select OF
  1621. select OF_EARLY_FLATTREE
  1622. select IRQ_DOMAIN
  1623. help
  1624. Include support for flattened device tree machine descriptions.
  1625. # Compressed boot loader in ROM. Yes, we really want to ask about
  1626. # TEXT and BSS so we preserve their values in the config files.
  1627. config ZBOOT_ROM_TEXT
  1628. hex "Compressed ROM boot loader base address"
  1629. default "0"
  1630. help
  1631. The physical address at which the ROM-able zImage is to be
  1632. placed in the target. Platforms which normally make use of
  1633. ROM-able zImage formats normally set this to a suitable
  1634. value in their defconfig file.
  1635. If ZBOOT_ROM is not enabled, this has no effect.
  1636. config ZBOOT_ROM_BSS
  1637. hex "Compressed ROM boot loader BSS address"
  1638. default "0"
  1639. help
  1640. The base address of an area of read/write memory in the target
  1641. for the ROM-able zImage which must be available while the
  1642. decompressor is running. It must be large enough to hold the
  1643. entire decompressed kernel plus an additional 128 KiB.
  1644. Platforms which normally make use of ROM-able zImage formats
  1645. normally set this to a suitable value in their defconfig file.
  1646. If ZBOOT_ROM is not enabled, this has no effect.
  1647. config ZBOOT_ROM
  1648. bool "Compressed boot loader in ROM/flash"
  1649. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1650. help
  1651. Say Y here if you intend to execute your compressed kernel image
  1652. (zImage) directly from ROM or flash. If unsure, say N.
  1653. choice
  1654. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1655. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1656. default ZBOOT_ROM_NONE
  1657. help
  1658. Include experimental SD/MMC loading code in the ROM-able zImage.
  1659. With this enabled it is possible to write the the ROM-able zImage
  1660. kernel image to an MMC or SD card and boot the kernel straight
  1661. from the reset vector. At reset the processor Mask ROM will load
  1662. the first part of the the ROM-able zImage which in turn loads the
  1663. rest the kernel image to RAM.
  1664. config ZBOOT_ROM_NONE
  1665. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1666. help
  1667. Do not load image from SD or MMC
  1668. config ZBOOT_ROM_MMCIF
  1669. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1670. help
  1671. Load image from MMCIF hardware block.
  1672. config ZBOOT_ROM_SH_MOBILE_SDHI
  1673. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1674. help
  1675. Load image from SDHI hardware block
  1676. endchoice
  1677. config ARM_APPENDED_DTB
  1678. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1679. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1680. help
  1681. With this option, the boot code will look for a device tree binary
  1682. (DTB) appended to zImage
  1683. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1684. This is meant as a backward compatibility convenience for those
  1685. systems with a bootloader that can't be upgraded to accommodate
  1686. the documented boot protocol using a device tree.
  1687. Beware that there is very little in terms of protection against
  1688. this option being confused by leftover garbage in memory that might
  1689. look like a DTB header after a reboot if no actual DTB is appended
  1690. to zImage. Do not leave this option active in a production kernel
  1691. if you don't intend to always append a DTB. Proper passing of the
  1692. location into r2 of a bootloader provided DTB is always preferable
  1693. to this option.
  1694. config ARM_ATAG_DTB_COMPAT
  1695. bool "Supplement the appended DTB with traditional ATAG information"
  1696. depends on ARM_APPENDED_DTB
  1697. help
  1698. Some old bootloaders can't be updated to a DTB capable one, yet
  1699. they provide ATAGs with memory configuration, the ramdisk address,
  1700. the kernel cmdline string, etc. Such information is dynamically
  1701. provided by the bootloader and can't always be stored in a static
  1702. DTB. To allow a device tree enabled kernel to be used with such
  1703. bootloaders, this option allows zImage to extract the information
  1704. from the ATAG list and store it at run time into the appended DTB.
  1705. config CMDLINE
  1706. string "Default kernel command string"
  1707. default ""
  1708. help
  1709. On some architectures (EBSA110 and CATS), there is currently no way
  1710. for the boot loader to pass arguments to the kernel. For these
  1711. architectures, you should supply some command-line options at build
  1712. time by entering them here. As a minimum, you should specify the
  1713. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1714. choice
  1715. prompt "Kernel command line type" if CMDLINE != ""
  1716. default CMDLINE_FROM_BOOTLOADER
  1717. config CMDLINE_FROM_BOOTLOADER
  1718. bool "Use bootloader kernel arguments if available"
  1719. help
  1720. Uses the command-line options passed by the boot loader. If
  1721. the boot loader doesn't provide any, the default kernel command
  1722. string provided in CMDLINE will be used.
  1723. config CMDLINE_EXTEND
  1724. bool "Extend bootloader kernel arguments"
  1725. help
  1726. The command-line arguments provided by the boot loader will be
  1727. appended to the default kernel command string.
  1728. config CMDLINE_FORCE
  1729. bool "Always use the default kernel command string"
  1730. help
  1731. Always use the default kernel command string, even if the boot
  1732. loader passes other arguments to the kernel.
  1733. This is useful if you cannot or don't want to change the
  1734. command-line options your boot loader passes to the kernel.
  1735. endchoice
  1736. config XIP_KERNEL
  1737. bool "Kernel Execute-In-Place from ROM"
  1738. depends on !ZBOOT_ROM && !ARM_LPAE
  1739. help
  1740. Execute-In-Place allows the kernel to run from non-volatile storage
  1741. directly addressable by the CPU, such as NOR flash. This saves RAM
  1742. space since the text section of the kernel is not loaded from flash
  1743. to RAM. Read-write sections, such as the data section and stack,
  1744. are still copied to RAM. The XIP kernel is not compressed since
  1745. it has to run directly from flash, so it will take more space to
  1746. store it. The flash address used to link the kernel object files,
  1747. and for storing it, is configuration dependent. Therefore, if you
  1748. say Y here, you must know the proper physical address where to
  1749. store the kernel image depending on your own flash memory usage.
  1750. Also note that the make target becomes "make xipImage" rather than
  1751. "make zImage" or "make Image". The final kernel binary to put in
  1752. ROM memory will be arch/arm/boot/xipImage.
  1753. If unsure, say N.
  1754. config XIP_PHYS_ADDR
  1755. hex "XIP Kernel Physical Location"
  1756. depends on XIP_KERNEL
  1757. default "0x00080000"
  1758. help
  1759. This is the physical address in your flash memory the kernel will
  1760. be linked for and stored to. This address is dependent on your
  1761. own flash usage.
  1762. config KEXEC
  1763. bool "Kexec system call (EXPERIMENTAL)"
  1764. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1765. help
  1766. kexec is a system call that implements the ability to shutdown your
  1767. current kernel, and to start another kernel. It is like a reboot
  1768. but it is independent of the system firmware. And like a reboot
  1769. you can start any kernel with it, not just Linux.
  1770. It is an ongoing process to be certain the hardware in a machine
  1771. is properly shutdown, so do not be surprised if this code does not
  1772. initially work for you. It may help to enable device hotplugging
  1773. support.
  1774. config ATAGS_PROC
  1775. bool "Export atags in procfs"
  1776. depends on KEXEC
  1777. default y
  1778. help
  1779. Should the atags used to boot the kernel be exported in an "atags"
  1780. file in procfs. Useful with kexec.
  1781. config CRASH_DUMP
  1782. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1783. depends on EXPERIMENTAL
  1784. help
  1785. Generate crash dump after being started by kexec. This should
  1786. be normally only set in special crash dump kernels which are
  1787. loaded in the main kernel with kexec-tools into a specially
  1788. reserved region and then later executed after a crash by
  1789. kdump/kexec. The crash dump kernel must be compiled to a
  1790. memory address not used by the main kernel
  1791. For more details see Documentation/kdump/kdump.txt
  1792. config AUTO_ZRELADDR
  1793. bool "Auto calculation of the decompressed kernel image address"
  1794. depends on !ZBOOT_ROM && !ARCH_U300
  1795. help
  1796. ZRELADDR is the physical address where the decompressed kernel
  1797. image will be placed. If AUTO_ZRELADDR is selected, the address
  1798. will be determined at run-time by masking the current IP with
  1799. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1800. from start of memory.
  1801. endmenu
  1802. menu "CPU Power Management"
  1803. if ARCH_HAS_CPUFREQ
  1804. source "drivers/cpufreq/Kconfig"
  1805. config CPU_FREQ_IMX
  1806. tristate "CPUfreq driver for i.MX CPUs"
  1807. depends on ARCH_MXC && CPU_FREQ
  1808. help
  1809. This enables the CPUfreq driver for i.MX CPUs.
  1810. config CPU_FREQ_SA1100
  1811. bool
  1812. config CPU_FREQ_SA1110
  1813. bool
  1814. config CPU_FREQ_INTEGRATOR
  1815. tristate "CPUfreq driver for ARM Integrator CPUs"
  1816. depends on ARCH_INTEGRATOR && CPU_FREQ
  1817. default y
  1818. help
  1819. This enables the CPUfreq driver for ARM Integrator CPUs.
  1820. For details, take a look at <file:Documentation/cpu-freq>.
  1821. If in doubt, say Y.
  1822. config CPU_FREQ_PXA
  1823. bool
  1824. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1825. default y
  1826. select CPU_FREQ_TABLE
  1827. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1828. config CPU_FREQ_S3C
  1829. bool
  1830. help
  1831. Internal configuration node for common cpufreq on Samsung SoC
  1832. config CPU_FREQ_S3C24XX
  1833. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1834. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1835. select CPU_FREQ_S3C
  1836. help
  1837. This enables the CPUfreq driver for the Samsung S3C24XX family
  1838. of CPUs.
  1839. For details, take a look at <file:Documentation/cpu-freq>.
  1840. If in doubt, say N.
  1841. config CPU_FREQ_S3C24XX_PLL
  1842. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1843. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1844. help
  1845. Compile in support for changing the PLL frequency from the
  1846. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1847. after a frequency change, so by default it is not enabled.
  1848. This also means that the PLL tables for the selected CPU(s) will
  1849. be built which may increase the size of the kernel image.
  1850. config CPU_FREQ_S3C24XX_DEBUG
  1851. bool "Debug CPUfreq Samsung driver core"
  1852. depends on CPU_FREQ_S3C24XX
  1853. help
  1854. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1855. config CPU_FREQ_S3C24XX_IODEBUG
  1856. bool "Debug CPUfreq Samsung driver IO timing"
  1857. depends on CPU_FREQ_S3C24XX
  1858. help
  1859. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1860. config CPU_FREQ_S3C24XX_DEBUGFS
  1861. bool "Export debugfs for CPUFreq"
  1862. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1863. help
  1864. Export status information via debugfs.
  1865. endif
  1866. source "drivers/cpuidle/Kconfig"
  1867. endmenu
  1868. menu "Floating point emulation"
  1869. comment "At least one emulation must be selected"
  1870. config FPE_NWFPE
  1871. bool "NWFPE math emulation"
  1872. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1873. ---help---
  1874. Say Y to include the NWFPE floating point emulator in the kernel.
  1875. This is necessary to run most binaries. Linux does not currently
  1876. support floating point hardware so you need to say Y here even if
  1877. your machine has an FPA or floating point co-processor podule.
  1878. You may say N here if you are going to load the Acorn FPEmulator
  1879. early in the bootup.
  1880. config FPE_NWFPE_XP
  1881. bool "Support extended precision"
  1882. depends on FPE_NWFPE
  1883. help
  1884. Say Y to include 80-bit support in the kernel floating-point
  1885. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1886. Note that gcc does not generate 80-bit operations by default,
  1887. so in most cases this option only enlarges the size of the
  1888. floating point emulator without any good reason.
  1889. You almost surely want to say N here.
  1890. config FPE_FASTFPE
  1891. bool "FastFPE math emulation (EXPERIMENTAL)"
  1892. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1893. ---help---
  1894. Say Y here to include the FAST floating point emulator in the kernel.
  1895. This is an experimental much faster emulator which now also has full
  1896. precision for the mantissa. It does not support any exceptions.
  1897. It is very simple, and approximately 3-6 times faster than NWFPE.
  1898. It should be sufficient for most programs. It may be not suitable
  1899. for scientific calculations, but you have to check this for yourself.
  1900. If you do not feel you need a faster FP emulation you should better
  1901. choose NWFPE.
  1902. config VFP
  1903. bool "VFP-format floating point maths"
  1904. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1905. help
  1906. Say Y to include VFP support code in the kernel. This is needed
  1907. if your hardware includes a VFP unit.
  1908. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1909. release notes and additional status information.
  1910. Say N if your target does not have VFP hardware.
  1911. config VFPv3
  1912. bool
  1913. depends on VFP
  1914. default y if CPU_V7
  1915. config NEON
  1916. bool "Advanced SIMD (NEON) Extension support"
  1917. depends on VFPv3 && CPU_V7
  1918. help
  1919. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1920. Extension.
  1921. endmenu
  1922. menu "Userspace binary formats"
  1923. source "fs/Kconfig.binfmt"
  1924. config ARTHUR
  1925. tristate "RISC OS personality"
  1926. depends on !AEABI
  1927. help
  1928. Say Y here to include the kernel code necessary if you want to run
  1929. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1930. experimental; if this sounds frightening, say N and sleep in peace.
  1931. You can also say M here to compile this support as a module (which
  1932. will be called arthur).
  1933. endmenu
  1934. menu "Power management options"
  1935. source "kernel/power/Kconfig"
  1936. config ARCH_SUSPEND_POSSIBLE
  1937. depends on !ARCH_S5PC100
  1938. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1939. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1940. def_bool y
  1941. config ARM_CPU_SUSPEND
  1942. def_bool PM_SLEEP
  1943. endmenu
  1944. source "net/Kconfig"
  1945. source "drivers/Kconfig"
  1946. source "fs/Kconfig"
  1947. source "arch/arm/Kconfig.debug"
  1948. source "security/Kconfig"
  1949. source "crypto/Kconfig"
  1950. source "lib/Kconfig"