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. select MULTI_IRQ_HANDLER
  229. help
  230. Support for ARM's Integrator platform.
  231. config ARCH_REALVIEW
  232. bool "ARM Ltd. RealView family"
  233. select ARM_AMBA
  234. select CLKDEV_LOOKUP
  235. select HAVE_MACH_CLKDEV
  236. select ICST
  237. select GENERIC_CLOCKEVENTS
  238. select ARCH_WANT_OPTIONAL_GPIOLIB
  239. select PLAT_VERSATILE
  240. select PLAT_VERSATILE_CLCD
  241. select ARM_TIMER_SP804
  242. select GPIO_PL061 if GPIOLIB
  243. select NEED_MACH_MEMORY_H
  244. help
  245. This enables support for ARM Ltd RealView boards.
  246. config ARCH_VERSATILE
  247. bool "ARM Ltd. Versatile family"
  248. select ARM_AMBA
  249. select ARM_VIC
  250. select CLKDEV_LOOKUP
  251. select HAVE_MACH_CLKDEV
  252. select ICST
  253. select GENERIC_CLOCKEVENTS
  254. select ARCH_WANT_OPTIONAL_GPIOLIB
  255. select PLAT_VERSATILE
  256. select PLAT_VERSATILE_CLCD
  257. select PLAT_VERSATILE_FPGA_IRQ
  258. select ARM_TIMER_SP804
  259. help
  260. This enables support for ARM Ltd Versatile board.
  261. config ARCH_VEXPRESS
  262. bool "ARM Ltd. Versatile Express family"
  263. select ARCH_WANT_OPTIONAL_GPIOLIB
  264. select ARM_AMBA
  265. select ARM_TIMER_SP804
  266. select CLKDEV_LOOKUP
  267. select HAVE_MACH_CLKDEV
  268. select GENERIC_CLOCKEVENTS
  269. select HAVE_CLK
  270. select HAVE_PATA_PLATFORM
  271. select ICST
  272. select NO_IOPORT
  273. select PLAT_VERSATILE
  274. select PLAT_VERSATILE_CLCD
  275. help
  276. This enables support for the ARM Ltd Versatile Express boards.
  277. config ARCH_AT91
  278. bool "Atmel AT91"
  279. select ARCH_REQUIRE_GPIOLIB
  280. select HAVE_CLK
  281. select CLKDEV_LOOKUP
  282. select IRQ_DOMAIN
  283. select NEED_MACH_IO_H if PCCARD
  284. help
  285. This enables support for systems based on the Atmel AT91RM9200,
  286. AT91SAM9 processors.
  287. config ARCH_BCMRING
  288. bool "Broadcom BCMRING"
  289. depends on MMU
  290. select CPU_V6
  291. select ARM_AMBA
  292. select ARM_TIMER_SP804
  293. select CLKDEV_LOOKUP
  294. select GENERIC_CLOCKEVENTS
  295. select ARCH_WANT_OPTIONAL_GPIOLIB
  296. help
  297. Support for Broadcom's BCMRing platform.
  298. config ARCH_HIGHBANK
  299. bool "Calxeda Highbank-based"
  300. select ARCH_WANT_OPTIONAL_GPIOLIB
  301. select ARM_AMBA
  302. select ARM_GIC
  303. select ARM_TIMER_SP804
  304. select CACHE_L2X0
  305. select CLKDEV_LOOKUP
  306. select CPU_V7
  307. select GENERIC_CLOCKEVENTS
  308. select HAVE_ARM_SCU
  309. select HAVE_SMP
  310. select SPARSE_IRQ
  311. select USE_OF
  312. help
  313. Support for the Calxeda Highbank SoC based boards.
  314. config ARCH_CLPS711X
  315. bool "Cirrus Logic CLPS711x/EP721x-based"
  316. select CPU_ARM720T
  317. select ARCH_USES_GETTIMEOFFSET
  318. select NEED_MACH_MEMORY_H
  319. help
  320. Support for Cirrus Logic 711x/721x based boards.
  321. config ARCH_CNS3XXX
  322. bool "Cavium Networks CNS3XXX family"
  323. select CPU_V6K
  324. select GENERIC_CLOCKEVENTS
  325. select ARM_GIC
  326. select MIGHT_HAVE_CACHE_L2X0
  327. select MIGHT_HAVE_PCI
  328. select PCI_DOMAINS if PCI
  329. help
  330. Support for Cavium Networks CNS3XXX platform.
  331. config ARCH_GEMINI
  332. bool "Cortina Systems Gemini"
  333. select CPU_FA526
  334. select ARCH_REQUIRE_GPIOLIB
  335. select ARCH_USES_GETTIMEOFFSET
  336. help
  337. Support for the Cortina Systems Gemini family SoCs
  338. config ARCH_PRIMA2
  339. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  340. select CPU_V7
  341. select NO_IOPORT
  342. select GENERIC_CLOCKEVENTS
  343. select CLKDEV_LOOKUP
  344. select GENERIC_IRQ_CHIP
  345. select MIGHT_HAVE_CACHE_L2X0
  346. select USE_OF
  347. select ZONE_DMA
  348. help
  349. Support for CSR SiRFSoC ARM Cortex A9 Platform
  350. config ARCH_EBSA110
  351. bool "EBSA-110"
  352. select CPU_SA110
  353. select ISA
  354. select NO_IOPORT
  355. select ARCH_USES_GETTIMEOFFSET
  356. select NEED_MACH_IO_H
  357. select NEED_MACH_MEMORY_H
  358. help
  359. This is an evaluation board for the StrongARM processor available
  360. from Digital. It has limited hardware on-board, including an
  361. Ethernet interface, two PCMCIA sockets, two serial ports and a
  362. parallel port.
  363. config ARCH_EP93XX
  364. bool "EP93xx-based"
  365. select CPU_ARM920T
  366. select ARM_AMBA
  367. select ARM_VIC
  368. select CLKDEV_LOOKUP
  369. select ARCH_REQUIRE_GPIOLIB
  370. select ARCH_HAS_HOLES_MEMORYMODEL
  371. select ARCH_USES_GETTIMEOFFSET
  372. select NEED_MACH_MEMORY_H
  373. help
  374. This enables support for the Cirrus EP93xx series of CPUs.
  375. config ARCH_FOOTBRIDGE
  376. bool "FootBridge"
  377. select CPU_SA110
  378. select FOOTBRIDGE
  379. select GENERIC_CLOCKEVENTS
  380. select HAVE_IDE
  381. select NEED_MACH_IO_H
  382. select NEED_MACH_MEMORY_H
  383. help
  384. Support for systems based on the DC21285 companion chip
  385. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  386. config ARCH_MXC
  387. bool "Freescale MXC/iMX-based"
  388. select GENERIC_CLOCKEVENTS
  389. select ARCH_REQUIRE_GPIOLIB
  390. select CLKDEV_LOOKUP
  391. select CLKSRC_MMIO
  392. select GENERIC_IRQ_CHIP
  393. select MULTI_IRQ_HANDLER
  394. help
  395. Support for Freescale MXC/iMX-based family of processors
  396. config ARCH_MXS
  397. bool "Freescale MXS-based"
  398. select GENERIC_CLOCKEVENTS
  399. select ARCH_REQUIRE_GPIOLIB
  400. select CLKDEV_LOOKUP
  401. select CLKSRC_MMIO
  402. select HAVE_CLK_PREPARE
  403. help
  404. Support for Freescale MXS-based family of processors
  405. config ARCH_NETX
  406. bool "Hilscher NetX based"
  407. select CLKSRC_MMIO
  408. select CPU_ARM926T
  409. select ARM_VIC
  410. select GENERIC_CLOCKEVENTS
  411. help
  412. This enables support for systems based on the Hilscher NetX Soc
  413. config ARCH_H720X
  414. bool "Hynix HMS720x-based"
  415. select CPU_ARM720T
  416. select ISA_DMA_API
  417. select ARCH_USES_GETTIMEOFFSET
  418. help
  419. This enables support for systems based on the Hynix HMS720x
  420. config ARCH_IOP13XX
  421. bool "IOP13xx-based"
  422. depends on MMU
  423. select CPU_XSC3
  424. select PLAT_IOP
  425. select PCI
  426. select ARCH_SUPPORTS_MSI
  427. select VMSPLIT_1G
  428. select NEED_MACH_IO_H
  429. select NEED_MACH_MEMORY_H
  430. select NEED_RET_TO_USER
  431. help
  432. Support for Intel's IOP13XX (XScale) family of processors.
  433. config ARCH_IOP32X
  434. bool "IOP32x-based"
  435. depends on MMU
  436. select CPU_XSCALE
  437. select NEED_MACH_IO_H
  438. select NEED_RET_TO_USER
  439. select PLAT_IOP
  440. select PCI
  441. select ARCH_REQUIRE_GPIOLIB
  442. help
  443. Support for Intel's 80219 and IOP32X (XScale) family of
  444. processors.
  445. config ARCH_IOP33X
  446. bool "IOP33x-based"
  447. depends on MMU
  448. select CPU_XSCALE
  449. select NEED_MACH_IO_H
  450. select NEED_RET_TO_USER
  451. select PLAT_IOP
  452. select PCI
  453. select ARCH_REQUIRE_GPIOLIB
  454. help
  455. Support for Intel's IOP33X (XScale) family of processors.
  456. config ARCH_IXP23XX
  457. bool "IXP23XX-based"
  458. depends on MMU
  459. select CPU_XSC3
  460. select PCI
  461. select ARCH_USES_GETTIMEOFFSET
  462. select NEED_MACH_IO_H
  463. select NEED_MACH_MEMORY_H
  464. help
  465. Support for Intel's IXP23xx (XScale) family of processors.
  466. config ARCH_IXP2000
  467. bool "IXP2400/2800-based"
  468. depends on MMU
  469. select CPU_XSCALE
  470. select PCI
  471. select ARCH_USES_GETTIMEOFFSET
  472. select NEED_MACH_IO_H
  473. select NEED_MACH_MEMORY_H
  474. help
  475. Support for Intel's IXP2400/2800 (XScale) family of processors.
  476. config ARCH_IXP4XX
  477. bool "IXP4xx-based"
  478. depends on MMU
  479. select ARCH_HAS_DMA_SET_COHERENT_MASK
  480. select CLKSRC_MMIO
  481. select CPU_XSCALE
  482. select GENERIC_GPIO
  483. select GENERIC_CLOCKEVENTS
  484. select MIGHT_HAVE_PCI
  485. select NEED_MACH_IO_H
  486. select DMABOUNCE if PCI
  487. help
  488. Support for Intel's IXP4XX (XScale) family of processors.
  489. config ARCH_DOVE
  490. bool "Marvell Dove"
  491. select CPU_V7
  492. select PCI
  493. select ARCH_REQUIRE_GPIOLIB
  494. select GENERIC_CLOCKEVENTS
  495. select NEED_MACH_IO_H
  496. select PLAT_ORION
  497. help
  498. Support for the Marvell Dove SoC 88AP510
  499. config ARCH_KIRKWOOD
  500. bool "Marvell Kirkwood"
  501. select CPU_FEROCEON
  502. select PCI
  503. select ARCH_REQUIRE_GPIOLIB
  504. select GENERIC_CLOCKEVENTS
  505. select NEED_MACH_IO_H
  506. select PLAT_ORION
  507. help
  508. Support for the following Marvell Kirkwood series SoCs:
  509. 88F6180, 88F6192 and 88F6281.
  510. config ARCH_LPC32XX
  511. bool "NXP LPC32XX"
  512. select CLKSRC_MMIO
  513. select CPU_ARM926T
  514. select ARCH_REQUIRE_GPIOLIB
  515. select HAVE_IDE
  516. select ARM_AMBA
  517. select USB_ARCH_HAS_OHCI
  518. select CLKDEV_LOOKUP
  519. select GENERIC_CLOCKEVENTS
  520. help
  521. Support for the NXP LPC32XX family of processors
  522. config ARCH_MV78XX0
  523. bool "Marvell MV78xx0"
  524. select CPU_FEROCEON
  525. select PCI
  526. select ARCH_REQUIRE_GPIOLIB
  527. select GENERIC_CLOCKEVENTS
  528. select NEED_MACH_IO_H
  529. select PLAT_ORION
  530. help
  531. Support for the following Marvell MV78xx0 series SoCs:
  532. MV781x0, MV782x0.
  533. config ARCH_ORION5X
  534. bool "Marvell Orion"
  535. depends on MMU
  536. select CPU_FEROCEON
  537. select PCI
  538. select ARCH_REQUIRE_GPIOLIB
  539. select GENERIC_CLOCKEVENTS
  540. select PLAT_ORION
  541. help
  542. Support for the following Marvell Orion 5x series SoCs:
  543. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  544. Orion-2 (5281), Orion-1-90 (6183).
  545. config ARCH_MMP
  546. bool "Marvell PXA168/910/MMP2"
  547. depends on MMU
  548. select ARCH_REQUIRE_GPIOLIB
  549. select CLKDEV_LOOKUP
  550. select GENERIC_CLOCKEVENTS
  551. select GPIO_PXA
  552. select TICK_ONESHOT
  553. select PLAT_PXA
  554. select SPARSE_IRQ
  555. select GENERIC_ALLOCATOR
  556. help
  557. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  558. config ARCH_KS8695
  559. bool "Micrel/Kendin KS8695"
  560. select CPU_ARM922T
  561. select ARCH_REQUIRE_GPIOLIB
  562. select ARCH_USES_GETTIMEOFFSET
  563. select NEED_MACH_MEMORY_H
  564. help
  565. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  566. System-on-Chip devices.
  567. config ARCH_W90X900
  568. bool "Nuvoton W90X900 CPU"
  569. select CPU_ARM926T
  570. select ARCH_REQUIRE_GPIOLIB
  571. select CLKDEV_LOOKUP
  572. select CLKSRC_MMIO
  573. select GENERIC_CLOCKEVENTS
  574. help
  575. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  576. At present, the w90x900 has been renamed nuc900, regarding
  577. the ARM series product line, you can login the following
  578. link address to know more.
  579. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  580. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  581. config ARCH_TEGRA
  582. bool "NVIDIA Tegra"
  583. select CLKDEV_LOOKUP
  584. select CLKSRC_MMIO
  585. select GENERIC_CLOCKEVENTS
  586. select GENERIC_GPIO
  587. select HAVE_CLK
  588. select HAVE_SMP
  589. select MIGHT_HAVE_CACHE_L2X0
  590. select NEED_MACH_IO_H if PCI
  591. select ARCH_HAS_CPUFREQ
  592. help
  593. This enables support for NVIDIA Tegra based systems (Tegra APX,
  594. Tegra 6xx and Tegra 2 series).
  595. config ARCH_PICOXCELL
  596. bool "Picochip picoXcell"
  597. select ARCH_REQUIRE_GPIOLIB
  598. select ARM_PATCH_PHYS_VIRT
  599. select ARM_VIC
  600. select CPU_V6K
  601. select DW_APB_TIMER
  602. select GENERIC_CLOCKEVENTS
  603. select GENERIC_GPIO
  604. select HAVE_TCM
  605. select NO_IOPORT
  606. select SPARSE_IRQ
  607. select USE_OF
  608. help
  609. This enables support for systems based on the Picochip picoXcell
  610. family of Femtocell devices. The picoxcell support requires device tree
  611. for all boards.
  612. config ARCH_PNX4008
  613. bool "Philips Nexperia PNX4008 Mobile"
  614. select CPU_ARM926T
  615. select CLKDEV_LOOKUP
  616. select ARCH_USES_GETTIMEOFFSET
  617. help
  618. This enables support for Philips PNX4008 mobile platform.
  619. config ARCH_PXA
  620. bool "PXA2xx/PXA3xx-based"
  621. depends on MMU
  622. select ARCH_MTD_XIP
  623. select ARCH_HAS_CPUFREQ
  624. select CLKDEV_LOOKUP
  625. select CLKSRC_MMIO
  626. select ARCH_REQUIRE_GPIOLIB
  627. select GENERIC_CLOCKEVENTS
  628. select GPIO_PXA
  629. select TICK_ONESHOT
  630. select PLAT_PXA
  631. select SPARSE_IRQ
  632. select AUTO_ZRELADDR
  633. select MULTI_IRQ_HANDLER
  634. select ARM_CPU_SUSPEND if PM
  635. select HAVE_IDE
  636. help
  637. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  638. config ARCH_MSM
  639. bool "Qualcomm MSM"
  640. select HAVE_CLK
  641. select GENERIC_CLOCKEVENTS
  642. select ARCH_REQUIRE_GPIOLIB
  643. select CLKDEV_LOOKUP
  644. help
  645. Support for Qualcomm MSM/QSD based systems. This runs on the
  646. apps processor of the MSM/QSD and depends on a shared memory
  647. interface to the modem processor which runs the baseband
  648. stack and controls some vital subsystems
  649. (clock and power control, etc).
  650. config ARCH_SHMOBILE
  651. bool "Renesas SH-Mobile / R-Mobile"
  652. select HAVE_CLK
  653. select CLKDEV_LOOKUP
  654. select HAVE_MACH_CLKDEV
  655. select HAVE_SMP
  656. select GENERIC_CLOCKEVENTS
  657. select MIGHT_HAVE_CACHE_L2X0
  658. select NO_IOPORT
  659. select SPARSE_IRQ
  660. select MULTI_IRQ_HANDLER
  661. select PM_GENERIC_DOMAINS if PM
  662. select NEED_MACH_MEMORY_H
  663. help
  664. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  665. config ARCH_RPC
  666. bool "RiscPC"
  667. select ARCH_ACORN
  668. select FIQ
  669. select ARCH_MAY_HAVE_PC_FDC
  670. select HAVE_PATA_PLATFORM
  671. select ISA_DMA_API
  672. select NO_IOPORT
  673. select ARCH_SPARSEMEM_ENABLE
  674. select ARCH_USES_GETTIMEOFFSET
  675. select HAVE_IDE
  676. select NEED_MACH_IO_H
  677. select NEED_MACH_MEMORY_H
  678. help
  679. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  680. CD-ROM interface, serial and parallel port, and the floppy drive.
  681. config ARCH_SA1100
  682. bool "SA1100-based"
  683. select CLKSRC_MMIO
  684. select CPU_SA1100
  685. select ISA
  686. select ARCH_SPARSEMEM_ENABLE
  687. select ARCH_MTD_XIP
  688. select ARCH_HAS_CPUFREQ
  689. select CPU_FREQ
  690. select GENERIC_CLOCKEVENTS
  691. select CLKDEV_LOOKUP
  692. select TICK_ONESHOT
  693. select ARCH_REQUIRE_GPIOLIB
  694. select HAVE_IDE
  695. select NEED_MACH_MEMORY_H
  696. select SPARSE_IRQ
  697. help
  698. Support for StrongARM 11x0 based boards.
  699. config ARCH_S3C24XX
  700. bool "Samsung S3C24XX SoCs"
  701. select GENERIC_GPIO
  702. select ARCH_HAS_CPUFREQ
  703. select HAVE_CLK
  704. select CLKDEV_LOOKUP
  705. select ARCH_USES_GETTIMEOFFSET
  706. select HAVE_S3C2410_I2C if I2C
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  709. select NEED_MACH_IO_H
  710. help
  711. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  712. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  713. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  714. Samsung SMDK2410 development board (and derivatives).
  715. config ARCH_S3C64XX
  716. bool "Samsung S3C64XX"
  717. select PLAT_SAMSUNG
  718. select CPU_V6
  719. select ARM_VIC
  720. select HAVE_CLK
  721. select HAVE_TCM
  722. select CLKDEV_LOOKUP
  723. select NO_IOPORT
  724. select ARCH_USES_GETTIMEOFFSET
  725. select ARCH_HAS_CPUFREQ
  726. select ARCH_REQUIRE_GPIOLIB
  727. select SAMSUNG_CLKSRC
  728. select SAMSUNG_IRQ_VIC_TIMER
  729. select S3C_GPIO_TRACK
  730. select S3C_DEV_NAND
  731. select USB_ARCH_HAS_OHCI
  732. select SAMSUNG_GPIOLIB_4BIT
  733. select HAVE_S3C2410_I2C if I2C
  734. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  735. help
  736. Samsung S3C64XX series based systems
  737. config ARCH_S5P64X0
  738. bool "Samsung S5P6440 S5P6450"
  739. select CPU_V6
  740. select GENERIC_GPIO
  741. select HAVE_CLK
  742. select CLKDEV_LOOKUP
  743. select CLKSRC_MMIO
  744. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  745. select GENERIC_CLOCKEVENTS
  746. select HAVE_S3C2410_I2C if I2C
  747. select HAVE_S3C_RTC if RTC_CLASS
  748. help
  749. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  750. SMDK6450.
  751. config ARCH_S5PC100
  752. bool "Samsung S5PC100"
  753. select GENERIC_GPIO
  754. select HAVE_CLK
  755. select CLKDEV_LOOKUP
  756. select CPU_V7
  757. select ARCH_USES_GETTIMEOFFSET
  758. select HAVE_S3C2410_I2C if I2C
  759. select HAVE_S3C_RTC if RTC_CLASS
  760. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  761. help
  762. Samsung S5PC100 series based systems
  763. config ARCH_S5PV210
  764. bool "Samsung S5PV210/S5PC110"
  765. select CPU_V7
  766. select ARCH_SPARSEMEM_ENABLE
  767. select ARCH_HAS_HOLES_MEMORYMODEL
  768. select GENERIC_GPIO
  769. select HAVE_CLK
  770. select CLKDEV_LOOKUP
  771. select CLKSRC_MMIO
  772. select ARCH_HAS_CPUFREQ
  773. select GENERIC_CLOCKEVENTS
  774. select HAVE_S3C2410_I2C if I2C
  775. select HAVE_S3C_RTC if RTC_CLASS
  776. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  777. select NEED_MACH_MEMORY_H
  778. help
  779. Samsung S5PV210/S5PC110 series based systems
  780. config ARCH_EXYNOS
  781. bool "SAMSUNG EXYNOS"
  782. select CPU_V7
  783. select ARCH_SPARSEMEM_ENABLE
  784. select ARCH_HAS_HOLES_MEMORYMODEL
  785. select GENERIC_GPIO
  786. select HAVE_CLK
  787. select CLKDEV_LOOKUP
  788. select ARCH_HAS_CPUFREQ
  789. select GENERIC_CLOCKEVENTS
  790. select HAVE_S3C_RTC if RTC_CLASS
  791. select HAVE_S3C2410_I2C if I2C
  792. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  793. select NEED_MACH_MEMORY_H
  794. help
  795. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  796. config ARCH_SHARK
  797. bool "Shark"
  798. select CPU_SA110
  799. select ISA
  800. select ISA_DMA
  801. select ZONE_DMA
  802. select PCI
  803. select ARCH_USES_GETTIMEOFFSET
  804. select NEED_MACH_MEMORY_H
  805. select NEED_MACH_IO_H
  806. help
  807. Support for the StrongARM based Digital DNARD machine, also known
  808. as "Shark" (<http://www.shark-linux.de/shark.html>).
  809. config ARCH_U300
  810. bool "ST-Ericsson U300 Series"
  811. depends on MMU
  812. select CLKSRC_MMIO
  813. select CPU_ARM926T
  814. select HAVE_TCM
  815. select ARM_AMBA
  816. select ARM_PATCH_PHYS_VIRT
  817. select ARM_VIC
  818. select GENERIC_CLOCKEVENTS
  819. select CLKDEV_LOOKUP
  820. select HAVE_MACH_CLKDEV
  821. select GENERIC_GPIO
  822. select ARCH_REQUIRE_GPIOLIB
  823. help
  824. Support for ST-Ericsson U300 series mobile platforms.
  825. config ARCH_U8500
  826. bool "ST-Ericsson U8500 Series"
  827. depends on MMU
  828. select CPU_V7
  829. select ARM_AMBA
  830. select GENERIC_CLOCKEVENTS
  831. select CLKDEV_LOOKUP
  832. select ARCH_REQUIRE_GPIOLIB
  833. select ARCH_HAS_CPUFREQ
  834. select HAVE_SMP
  835. select MIGHT_HAVE_CACHE_L2X0
  836. help
  837. Support for ST-Ericsson's Ux500 architecture
  838. config ARCH_NOMADIK
  839. bool "STMicroelectronics Nomadik"
  840. select ARM_AMBA
  841. select ARM_VIC
  842. select CPU_ARM926T
  843. select CLKDEV_LOOKUP
  844. select GENERIC_CLOCKEVENTS
  845. select MIGHT_HAVE_CACHE_L2X0
  846. select ARCH_REQUIRE_GPIOLIB
  847. help
  848. Support for the Nomadik platform by ST-Ericsson
  849. config ARCH_DAVINCI
  850. bool "TI DaVinci"
  851. select GENERIC_CLOCKEVENTS
  852. select ARCH_REQUIRE_GPIOLIB
  853. select ZONE_DMA
  854. select HAVE_IDE
  855. select CLKDEV_LOOKUP
  856. select GENERIC_ALLOCATOR
  857. select GENERIC_IRQ_CHIP
  858. select ARCH_HAS_HOLES_MEMORYMODEL
  859. help
  860. Support for TI's DaVinci platform.
  861. config ARCH_OMAP
  862. bool "TI OMAP"
  863. select HAVE_CLK
  864. select ARCH_REQUIRE_GPIOLIB
  865. select ARCH_HAS_CPUFREQ
  866. select CLKSRC_MMIO
  867. select GENERIC_CLOCKEVENTS
  868. select ARCH_HAS_HOLES_MEMORYMODEL
  869. help
  870. Support for TI's OMAP platform (OMAP1/2/3/4).
  871. config PLAT_SPEAR
  872. bool "ST SPEAr"
  873. select ARM_AMBA
  874. select ARCH_REQUIRE_GPIOLIB
  875. select CLKDEV_LOOKUP
  876. select CLKSRC_MMIO
  877. select GENERIC_CLOCKEVENTS
  878. select HAVE_CLK
  879. help
  880. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  881. config ARCH_VT8500
  882. bool "VIA/WonderMedia 85xx"
  883. select CPU_ARM926T
  884. select GENERIC_GPIO
  885. select ARCH_HAS_CPUFREQ
  886. select GENERIC_CLOCKEVENTS
  887. select ARCH_REQUIRE_GPIOLIB
  888. select HAVE_PWM
  889. help
  890. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  891. config ARCH_ZYNQ
  892. bool "Xilinx Zynq ARM Cortex A9 Platform"
  893. select CPU_V7
  894. select GENERIC_CLOCKEVENTS
  895. select CLKDEV_LOOKUP
  896. select ARM_GIC
  897. select ARM_AMBA
  898. select ICST
  899. select MIGHT_HAVE_CACHE_L2X0
  900. select USE_OF
  901. help
  902. Support for Xilinx Zynq ARM Cortex A9 Platform
  903. endchoice
  904. #
  905. # This is sorted alphabetically by mach-* pathname. However, plat-*
  906. # Kconfigs may be included either alphabetically (according to the
  907. # plat- suffix) or along side the corresponding mach-* source.
  908. #
  909. source "arch/arm/mach-at91/Kconfig"
  910. source "arch/arm/mach-bcmring/Kconfig"
  911. source "arch/arm/mach-clps711x/Kconfig"
  912. source "arch/arm/mach-cns3xxx/Kconfig"
  913. source "arch/arm/mach-davinci/Kconfig"
  914. source "arch/arm/mach-dove/Kconfig"
  915. source "arch/arm/mach-ep93xx/Kconfig"
  916. source "arch/arm/mach-footbridge/Kconfig"
  917. source "arch/arm/mach-gemini/Kconfig"
  918. source "arch/arm/mach-h720x/Kconfig"
  919. source "arch/arm/mach-integrator/Kconfig"
  920. source "arch/arm/mach-iop32x/Kconfig"
  921. source "arch/arm/mach-iop33x/Kconfig"
  922. source "arch/arm/mach-iop13xx/Kconfig"
  923. source "arch/arm/mach-ixp4xx/Kconfig"
  924. source "arch/arm/mach-ixp2000/Kconfig"
  925. source "arch/arm/mach-ixp23xx/Kconfig"
  926. source "arch/arm/mach-kirkwood/Kconfig"
  927. source "arch/arm/mach-ks8695/Kconfig"
  928. source "arch/arm/mach-lpc32xx/Kconfig"
  929. source "arch/arm/mach-msm/Kconfig"
  930. source "arch/arm/mach-mv78xx0/Kconfig"
  931. source "arch/arm/plat-mxc/Kconfig"
  932. source "arch/arm/mach-mxs/Kconfig"
  933. source "arch/arm/mach-netx/Kconfig"
  934. source "arch/arm/mach-nomadik/Kconfig"
  935. source "arch/arm/plat-nomadik/Kconfig"
  936. source "arch/arm/plat-omap/Kconfig"
  937. source "arch/arm/mach-omap1/Kconfig"
  938. source "arch/arm/mach-omap2/Kconfig"
  939. source "arch/arm/mach-orion5x/Kconfig"
  940. source "arch/arm/mach-pxa/Kconfig"
  941. source "arch/arm/plat-pxa/Kconfig"
  942. source "arch/arm/mach-mmp/Kconfig"
  943. source "arch/arm/mach-realview/Kconfig"
  944. source "arch/arm/mach-sa1100/Kconfig"
  945. source "arch/arm/plat-samsung/Kconfig"
  946. source "arch/arm/plat-s3c24xx/Kconfig"
  947. source "arch/arm/plat-s5p/Kconfig"
  948. source "arch/arm/plat-spear/Kconfig"
  949. source "arch/arm/mach-s3c24xx/Kconfig"
  950. if ARCH_S3C24XX
  951. source "arch/arm/mach-s3c2412/Kconfig"
  952. source "arch/arm/mach-s3c2440/Kconfig"
  953. endif
  954. if ARCH_S3C64XX
  955. source "arch/arm/mach-s3c64xx/Kconfig"
  956. endif
  957. source "arch/arm/mach-s5p64x0/Kconfig"
  958. source "arch/arm/mach-s5pc100/Kconfig"
  959. source "arch/arm/mach-s5pv210/Kconfig"
  960. source "arch/arm/mach-exynos/Kconfig"
  961. source "arch/arm/mach-shmobile/Kconfig"
  962. source "arch/arm/mach-tegra/Kconfig"
  963. source "arch/arm/mach-u300/Kconfig"
  964. source "arch/arm/mach-ux500/Kconfig"
  965. source "arch/arm/mach-versatile/Kconfig"
  966. source "arch/arm/mach-vexpress/Kconfig"
  967. source "arch/arm/plat-versatile/Kconfig"
  968. source "arch/arm/mach-vt8500/Kconfig"
  969. source "arch/arm/mach-w90x900/Kconfig"
  970. # Definitions to make life easier
  971. config ARCH_ACORN
  972. bool
  973. config PLAT_IOP
  974. bool
  975. select GENERIC_CLOCKEVENTS
  976. config PLAT_ORION
  977. bool
  978. select CLKSRC_MMIO
  979. select GENERIC_IRQ_CHIP
  980. config PLAT_PXA
  981. bool
  982. config PLAT_VERSATILE
  983. bool
  984. config ARM_TIMER_SP804
  985. bool
  986. select CLKSRC_MMIO
  987. select HAVE_SCHED_CLOCK
  988. source arch/arm/mm/Kconfig
  989. config ARM_NR_BANKS
  990. int
  991. default 16 if ARCH_EP93XX
  992. default 8
  993. config IWMMXT
  994. bool "Enable iWMMXt support"
  995. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  996. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  997. help
  998. Enable support for iWMMXt context switching at run time if
  999. running on a CPU that supports it.
  1000. config XSCALE_PMU
  1001. bool
  1002. depends on CPU_XSCALE
  1003. default y
  1004. config CPU_HAS_PMU
  1005. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  1006. (!ARCH_OMAP3 || OMAP3_EMU)
  1007. default y
  1008. bool
  1009. config MULTI_IRQ_HANDLER
  1010. bool
  1011. help
  1012. Allow each machine to specify it's own IRQ handler at run time.
  1013. if !MMU
  1014. source "arch/arm/Kconfig-nommu"
  1015. endif
  1016. config ARM_ERRATA_326103
  1017. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1018. depends on CPU_V6
  1019. help
  1020. Executing a SWP instruction to read-only memory does not set bit 11
  1021. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1022. treat the access as a read, preventing a COW from occurring and
  1023. causing the faulting task to livelock.
  1024. config ARM_ERRATA_411920
  1025. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1026. depends on CPU_V6 || CPU_V6K
  1027. help
  1028. Invalidation of the Instruction Cache operation can
  1029. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1030. It does not affect the MPCore. This option enables the ARM Ltd.
  1031. recommended workaround.
  1032. config ARM_ERRATA_430973
  1033. bool "ARM errata: Stale prediction on replaced interworking branch"
  1034. depends on CPU_V7
  1035. help
  1036. This option enables the workaround for the 430973 Cortex-A8
  1037. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1038. interworking branch is replaced with another code sequence at the
  1039. same virtual address, whether due to self-modifying code or virtual
  1040. to physical address re-mapping, Cortex-A8 does not recover from the
  1041. stale interworking branch prediction. This results in Cortex-A8
  1042. executing the new code sequence in the incorrect ARM or Thumb state.
  1043. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1044. and also flushes the branch target cache at every context switch.
  1045. Note that setting specific bits in the ACTLR register may not be
  1046. available in non-secure mode.
  1047. config ARM_ERRATA_458693
  1048. bool "ARM errata: Processor deadlock when a false hazard is created"
  1049. depends on CPU_V7
  1050. help
  1051. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1052. erratum. For very specific sequences of memory operations, it is
  1053. possible for a hazard condition intended for a cache line to instead
  1054. be incorrectly associated with a different cache line. This false
  1055. hazard might then cause a processor deadlock. The workaround enables
  1056. the L1 caching of the NEON accesses and disables the PLD instruction
  1057. in the ACTLR register. Note that setting specific bits in the ACTLR
  1058. register may not be available in non-secure mode.
  1059. config ARM_ERRATA_460075
  1060. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1061. depends on CPU_V7
  1062. help
  1063. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1064. erratum. Any asynchronous access to the L2 cache may encounter a
  1065. situation in which recent store transactions to the L2 cache are lost
  1066. and overwritten with stale memory contents from external memory. The
  1067. workaround disables the write-allocate mode for the L2 cache via the
  1068. ACTLR register. Note that setting specific bits in the ACTLR register
  1069. may not be available in non-secure mode.
  1070. config ARM_ERRATA_742230
  1071. bool "ARM errata: DMB operation may be faulty"
  1072. depends on CPU_V7 && SMP
  1073. help
  1074. This option enables the workaround for the 742230 Cortex-A9
  1075. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1076. between two write operations may not ensure the correct visibility
  1077. ordering of the two writes. This workaround sets a specific bit in
  1078. the diagnostic register of the Cortex-A9 which causes the DMB
  1079. instruction to behave as a DSB, ensuring the correct behaviour of
  1080. the two writes.
  1081. config ARM_ERRATA_742231
  1082. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1083. depends on CPU_V7 && SMP
  1084. help
  1085. This option enables the workaround for the 742231 Cortex-A9
  1086. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1087. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1088. accessing some data located in the same cache line, may get corrupted
  1089. data due to bad handling of the address hazard when the line gets
  1090. replaced from one of the CPUs at the same time as another CPU is
  1091. accessing it. This workaround sets specific bits in the diagnostic
  1092. register of the Cortex-A9 which reduces the linefill issuing
  1093. capabilities of the processor.
  1094. config PL310_ERRATA_588369
  1095. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1096. depends on CACHE_L2X0
  1097. help
  1098. The PL310 L2 cache controller implements three types of Clean &
  1099. Invalidate maintenance operations: by Physical Address
  1100. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1101. They are architecturally defined to behave as the execution of a
  1102. clean operation followed immediately by an invalidate operation,
  1103. both performing to the same memory location. This functionality
  1104. is not correctly implemented in PL310 as clean lines are not
  1105. invalidated as a result of these operations.
  1106. config ARM_ERRATA_720789
  1107. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1108. depends on CPU_V7
  1109. help
  1110. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1111. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1112. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1113. As a consequence of this erratum, some TLB entries which should be
  1114. invalidated are not, resulting in an incoherency in the system page
  1115. tables. The workaround changes the TLB flushing routines to invalidate
  1116. entries regardless of the ASID.
  1117. config PL310_ERRATA_727915
  1118. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1119. depends on CACHE_L2X0
  1120. help
  1121. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1122. operation (offset 0x7FC). This operation runs in background so that
  1123. PL310 can handle normal accesses while it is in progress. Under very
  1124. rare circumstances, due to this erratum, write data can be lost when
  1125. PL310 treats a cacheable write transaction during a Clean &
  1126. Invalidate by Way operation.
  1127. config ARM_ERRATA_743622
  1128. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1129. depends on CPU_V7
  1130. help
  1131. This option enables the workaround for the 743622 Cortex-A9
  1132. (r2p*) erratum. Under very rare conditions, a faulty
  1133. optimisation in the Cortex-A9 Store Buffer may lead to data
  1134. corruption. This workaround sets a specific bit in the diagnostic
  1135. register of the Cortex-A9 which disables the Store Buffer
  1136. optimisation, preventing the defect from occurring. This has no
  1137. visible impact on the overall performance or power consumption of the
  1138. processor.
  1139. config ARM_ERRATA_751472
  1140. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1141. depends on CPU_V7
  1142. help
  1143. This option enables the workaround for the 751472 Cortex-A9 (prior
  1144. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1145. completion of a following broadcasted operation if the second
  1146. operation is received by a CPU before the ICIALLUIS has completed,
  1147. potentially leading to corrupted entries in the cache or TLB.
  1148. config PL310_ERRATA_753970
  1149. bool "PL310 errata: cache sync operation may be faulty"
  1150. depends on CACHE_PL310
  1151. help
  1152. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1153. Under some condition the effect of cache sync operation on
  1154. the store buffer still remains when the operation completes.
  1155. This means that the store buffer is always asked to drain and
  1156. this prevents it from merging any further writes. The workaround
  1157. is to replace the normal offset of cache sync operation (0x730)
  1158. by another offset targeting an unmapped PL310 register 0x740.
  1159. This has the same effect as the cache sync operation: store buffer
  1160. drain and waiting for all buffers empty.
  1161. config ARM_ERRATA_754322
  1162. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1163. depends on CPU_V7
  1164. help
  1165. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1166. r3p*) erratum. A speculative memory access may cause a page table walk
  1167. which starts prior to an ASID switch but completes afterwards. This
  1168. can populate the micro-TLB with a stale entry which may be hit with
  1169. the new ASID. This workaround places two dsb instructions in the mm
  1170. switching code so that no page table walks can cross the ASID switch.
  1171. config ARM_ERRATA_754327
  1172. bool "ARM errata: no automatic Store Buffer drain"
  1173. depends on CPU_V7 && SMP
  1174. help
  1175. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1176. r2p0) erratum. The Store Buffer does not have any automatic draining
  1177. mechanism and therefore a livelock may occur if an external agent
  1178. continuously polls a memory location waiting to observe an update.
  1179. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1180. written polling loops from denying visibility of updates to memory.
  1181. config ARM_ERRATA_364296
  1182. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1183. depends on CPU_V6 && !SMP
  1184. help
  1185. This options enables the workaround for the 364296 ARM1136
  1186. r0p2 erratum (possible cache data corruption with
  1187. hit-under-miss enabled). It sets the undocumented bit 31 in
  1188. the auxiliary control register and the FI bit in the control
  1189. register, thus disabling hit-under-miss without putting the
  1190. processor into full low interrupt latency mode. ARM11MPCore
  1191. is not affected.
  1192. config ARM_ERRATA_764369
  1193. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1194. depends on CPU_V7 && SMP
  1195. help
  1196. This option enables the workaround for erratum 764369
  1197. affecting Cortex-A9 MPCore with two or more processors (all
  1198. current revisions). Under certain timing circumstances, a data
  1199. cache line maintenance operation by MVA targeting an Inner
  1200. Shareable memory region may fail to proceed up to either the
  1201. Point of Coherency or to the Point of Unification of the
  1202. system. This workaround adds a DSB instruction before the
  1203. relevant cache maintenance functions and sets a specific bit
  1204. in the diagnostic control register of the SCU.
  1205. config PL310_ERRATA_769419
  1206. bool "PL310 errata: no automatic Store Buffer drain"
  1207. depends on CACHE_L2X0
  1208. help
  1209. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1210. not automatically drain. This can cause normal, non-cacheable
  1211. writes to be retained when the memory system is idle, leading
  1212. to suboptimal I/O performance for drivers using coherent DMA.
  1213. This option adds a write barrier to the cpu_idle loop so that,
  1214. on systems with an outer cache, the store buffer is drained
  1215. explicitly.
  1216. endmenu
  1217. source "arch/arm/common/Kconfig"
  1218. menu "Bus support"
  1219. config ARM_AMBA
  1220. bool
  1221. config ISA
  1222. bool
  1223. help
  1224. Find out whether you have ISA slots on your motherboard. ISA is the
  1225. name of a bus system, i.e. the way the CPU talks to the other stuff
  1226. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1227. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1228. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1229. # Select ISA DMA controller support
  1230. config ISA_DMA
  1231. bool
  1232. select ISA_DMA_API
  1233. # Select ISA DMA interface
  1234. config ISA_DMA_API
  1235. bool
  1236. config PCI
  1237. bool "PCI support" if MIGHT_HAVE_PCI
  1238. help
  1239. Find out whether you have a PCI motherboard. PCI is the name of a
  1240. bus system, i.e. the way the CPU talks to the other stuff inside
  1241. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1242. VESA. If you have PCI, say Y, otherwise N.
  1243. config PCI_DOMAINS
  1244. bool
  1245. depends on PCI
  1246. config PCI_NANOENGINE
  1247. bool "BSE nanoEngine PCI support"
  1248. depends on SA1100_NANOENGINE
  1249. help
  1250. Enable PCI on the BSE nanoEngine board.
  1251. config PCI_SYSCALL
  1252. def_bool PCI
  1253. # Select the host bridge type
  1254. config PCI_HOST_VIA82C505
  1255. bool
  1256. depends on PCI && ARCH_SHARK
  1257. default y
  1258. config PCI_HOST_ITE8152
  1259. bool
  1260. depends on PCI && MACH_ARMCORE
  1261. default y
  1262. select DMABOUNCE
  1263. source "drivers/pci/Kconfig"
  1264. source "drivers/pcmcia/Kconfig"
  1265. endmenu
  1266. menu "Kernel Features"
  1267. source "kernel/time/Kconfig"
  1268. config HAVE_SMP
  1269. bool
  1270. help
  1271. This option should be selected by machines which have an SMP-
  1272. capable CPU.
  1273. The only effect of this option is to make the SMP-related
  1274. options available to the user for configuration.
  1275. config SMP
  1276. bool "Symmetric Multi-Processing"
  1277. depends on CPU_V6K || CPU_V7
  1278. depends on GENERIC_CLOCKEVENTS
  1279. depends on HAVE_SMP
  1280. depends on MMU
  1281. select USE_GENERIC_SMP_HELPERS
  1282. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1283. help
  1284. This enables support for systems with more than one CPU. If you have
  1285. a system with only one CPU, like most personal computers, say N. If
  1286. you have a system with more than one CPU, say Y.
  1287. If you say N here, the kernel will run on single and multiprocessor
  1288. machines, but will use only one CPU of a multiprocessor machine. If
  1289. you say Y here, the kernel will run on many, but not all, single
  1290. processor machines. On a single processor machine, the kernel will
  1291. run faster if you say N here.
  1292. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1293. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1294. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1295. If you don't know what to do here, say N.
  1296. config SMP_ON_UP
  1297. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1298. depends on EXPERIMENTAL
  1299. depends on SMP && !XIP_KERNEL
  1300. default y
  1301. help
  1302. SMP kernels contain instructions which fail on non-SMP processors.
  1303. Enabling this option allows the kernel to modify itself to make
  1304. these instructions safe. Disabling it allows about 1K of space
  1305. savings.
  1306. If you don't know what to do here, say Y.
  1307. config ARM_CPU_TOPOLOGY
  1308. bool "Support cpu topology definition"
  1309. depends on SMP && CPU_V7
  1310. default y
  1311. help
  1312. Support ARM cpu topology definition. The MPIDR register defines
  1313. affinity between processors which is then used to describe the cpu
  1314. topology of an ARM System.
  1315. config SCHED_MC
  1316. bool "Multi-core scheduler support"
  1317. depends on ARM_CPU_TOPOLOGY
  1318. help
  1319. Multi-core scheduler support improves the CPU scheduler's decision
  1320. making when dealing with multi-core CPU chips at a cost of slightly
  1321. increased overhead in some places. If unsure say N here.
  1322. config SCHED_SMT
  1323. bool "SMT scheduler support"
  1324. depends on ARM_CPU_TOPOLOGY
  1325. help
  1326. Improves the CPU scheduler's decision making when dealing with
  1327. MultiThreading at a cost of slightly increased overhead in some
  1328. places. If unsure say N here.
  1329. config HAVE_ARM_SCU
  1330. bool
  1331. help
  1332. This option enables support for the ARM system coherency unit
  1333. config ARM_ARCH_TIMER
  1334. bool "Architected timer support"
  1335. depends on CPU_V7
  1336. help
  1337. This option enables support for the ARM architected timer
  1338. config HAVE_ARM_TWD
  1339. bool
  1340. depends on SMP
  1341. select TICK_ONESHOT
  1342. help
  1343. This options enables support for the ARM timer and watchdog unit
  1344. choice
  1345. prompt "Memory split"
  1346. default VMSPLIT_3G
  1347. help
  1348. Select the desired split between kernel and user memory.
  1349. If you are not absolutely sure what you are doing, leave this
  1350. option alone!
  1351. config VMSPLIT_3G
  1352. bool "3G/1G user/kernel split"
  1353. config VMSPLIT_2G
  1354. bool "2G/2G user/kernel split"
  1355. config VMSPLIT_1G
  1356. bool "1G/3G user/kernel split"
  1357. endchoice
  1358. config PAGE_OFFSET
  1359. hex
  1360. default 0x40000000 if VMSPLIT_1G
  1361. default 0x80000000 if VMSPLIT_2G
  1362. default 0xC0000000
  1363. config NR_CPUS
  1364. int "Maximum number of CPUs (2-32)"
  1365. range 2 32
  1366. depends on SMP
  1367. default "4"
  1368. config HOTPLUG_CPU
  1369. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1370. depends on SMP && HOTPLUG && EXPERIMENTAL
  1371. help
  1372. Say Y here to experiment with turning CPUs off and on. CPUs
  1373. can be controlled through /sys/devices/system/cpu.
  1374. config LOCAL_TIMERS
  1375. bool "Use local timer interrupts"
  1376. depends on SMP
  1377. default y
  1378. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1379. help
  1380. Enable support for local timers on SMP platforms, rather then the
  1381. legacy IPI broadcast method. Local timers allows the system
  1382. accounting to be spread across the timer interval, preventing a
  1383. "thundering herd" at every timer tick.
  1384. config ARCH_NR_GPIO
  1385. int
  1386. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1387. default 355 if ARCH_U8500
  1388. default 264 if MACH_H4700
  1389. default 0
  1390. help
  1391. Maximum number of GPIOs in the system.
  1392. If unsure, leave the default value.
  1393. source kernel/Kconfig.preempt
  1394. config HZ
  1395. int
  1396. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1397. ARCH_S5PV210 || ARCH_EXYNOS4
  1398. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1399. default AT91_TIMER_HZ if ARCH_AT91
  1400. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1401. default 100
  1402. config THUMB2_KERNEL
  1403. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1404. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1405. select AEABI
  1406. select ARM_ASM_UNIFIED
  1407. select ARM_UNWIND
  1408. help
  1409. By enabling this option, the kernel will be compiled in
  1410. Thumb-2 mode. A compiler/assembler that understand the unified
  1411. ARM-Thumb syntax is needed.
  1412. If unsure, say N.
  1413. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1414. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1415. depends on THUMB2_KERNEL && MODULES
  1416. default y
  1417. help
  1418. Various binutils versions can resolve Thumb-2 branches to
  1419. locally-defined, preemptible global symbols as short-range "b.n"
  1420. branch instructions.
  1421. This is a problem, because there's no guarantee the final
  1422. destination of the symbol, or any candidate locations for a
  1423. trampoline, are within range of the branch. For this reason, the
  1424. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1425. relocation in modules at all, and it makes little sense to add
  1426. support.
  1427. The symptom is that the kernel fails with an "unsupported
  1428. relocation" error when loading some modules.
  1429. Until fixed tools are available, passing
  1430. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1431. code which hits this problem, at the cost of a bit of extra runtime
  1432. stack usage in some cases.
  1433. The problem is described in more detail at:
  1434. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1435. Only Thumb-2 kernels are affected.
  1436. Unless you are sure your tools don't have this problem, say Y.
  1437. config ARM_ASM_UNIFIED
  1438. bool
  1439. config AEABI
  1440. bool "Use the ARM EABI to compile the kernel"
  1441. help
  1442. This option allows for the kernel to be compiled using the latest
  1443. ARM ABI (aka EABI). This is only useful if you are using a user
  1444. space environment that is also compiled with EABI.
  1445. Since there are major incompatibilities between the legacy ABI and
  1446. EABI, especially with regard to structure member alignment, this
  1447. option also changes the kernel syscall calling convention to
  1448. disambiguate both ABIs and allow for backward compatibility support
  1449. (selected with CONFIG_OABI_COMPAT).
  1450. To use this you need GCC version 4.0.0 or later.
  1451. config OABI_COMPAT
  1452. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1453. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1454. default y
  1455. help
  1456. This option preserves the old syscall interface along with the
  1457. new (ARM EABI) one. It also provides a compatibility layer to
  1458. intercept syscalls that have structure arguments which layout
  1459. in memory differs between the legacy ABI and the new ARM EABI
  1460. (only for non "thumb" binaries). This option adds a tiny
  1461. overhead to all syscalls and produces a slightly larger kernel.
  1462. If you know you'll be using only pure EABI user space then you
  1463. can say N here. If this option is not selected and you attempt
  1464. to execute a legacy ABI binary then the result will be
  1465. UNPREDICTABLE (in fact it can be predicted that it won't work
  1466. at all). If in doubt say Y.
  1467. config ARCH_HAS_HOLES_MEMORYMODEL
  1468. bool
  1469. config ARCH_SPARSEMEM_ENABLE
  1470. bool
  1471. config ARCH_SPARSEMEM_DEFAULT
  1472. def_bool ARCH_SPARSEMEM_ENABLE
  1473. config ARCH_SELECT_MEMORY_MODEL
  1474. def_bool ARCH_SPARSEMEM_ENABLE
  1475. config HAVE_ARCH_PFN_VALID
  1476. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1477. config HIGHMEM
  1478. bool "High Memory Support"
  1479. depends on MMU
  1480. help
  1481. The address space of ARM processors is only 4 Gigabytes large
  1482. and it has to accommodate user address space, kernel address
  1483. space as well as some memory mapped IO. That means that, if you
  1484. have a large amount of physical memory and/or IO, not all of the
  1485. memory can be "permanently mapped" by the kernel. The physical
  1486. memory that is not permanently mapped is called "high memory".
  1487. Depending on the selected kernel/user memory split, minimum
  1488. vmalloc space and actual amount of RAM, you may not need this
  1489. option which should result in a slightly faster kernel.
  1490. If unsure, say n.
  1491. config HIGHPTE
  1492. bool "Allocate 2nd-level pagetables from highmem"
  1493. depends on HIGHMEM
  1494. config HW_PERF_EVENTS
  1495. bool "Enable hardware performance counter support for perf events"
  1496. depends on PERF_EVENTS && CPU_HAS_PMU
  1497. default y
  1498. help
  1499. Enable hardware performance counter support for perf events. If
  1500. disabled, perf events will use software events only.
  1501. source "mm/Kconfig"
  1502. config FORCE_MAX_ZONEORDER
  1503. int "Maximum zone order" if ARCH_SHMOBILE
  1504. range 11 64 if ARCH_SHMOBILE
  1505. default "9" if SA1111
  1506. default "11"
  1507. help
  1508. The kernel memory allocator divides physically contiguous memory
  1509. blocks into "zones", where each zone is a power of two number of
  1510. pages. This option selects the largest power of two that the kernel
  1511. keeps in the memory allocator. If you need to allocate very large
  1512. blocks of physically contiguous memory, then you may need to
  1513. increase this value.
  1514. This config option is actually maximum order plus one. For example,
  1515. a value of 11 means that the largest free memory block is 2^10 pages.
  1516. config LEDS
  1517. bool "Timer and CPU usage LEDs"
  1518. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1519. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1520. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1521. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1522. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1523. ARCH_AT91 || ARCH_DAVINCI || \
  1524. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1525. help
  1526. If you say Y here, the LEDs on your machine will be used
  1527. to provide useful information about your current system status.
  1528. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1529. be able to select which LEDs are active using the options below. If
  1530. you are compiling a kernel for the EBSA-110 or the LART however, the
  1531. red LED will simply flash regularly to indicate that the system is
  1532. still functional. It is safe to say Y here if you have a CATS
  1533. system, but the driver will do nothing.
  1534. config LEDS_TIMER
  1535. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1536. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1537. || MACH_OMAP_PERSEUS2
  1538. depends on LEDS
  1539. depends on !GENERIC_CLOCKEVENTS
  1540. default y if ARCH_EBSA110
  1541. help
  1542. If you say Y here, one of the system LEDs (the green one on the
  1543. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1544. will flash regularly to indicate that the system is still
  1545. operational. This is mainly useful to kernel hackers who are
  1546. debugging unstable kernels.
  1547. The LART uses the same LED for both Timer LED and CPU usage LED
  1548. functions. You may choose to use both, but the Timer LED function
  1549. will overrule the CPU usage LED.
  1550. config LEDS_CPU
  1551. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1552. !ARCH_OMAP) \
  1553. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1554. || MACH_OMAP_PERSEUS2
  1555. depends on LEDS
  1556. help
  1557. If you say Y here, the red LED will be used to give a good real
  1558. time indication of CPU usage, by lighting whenever the idle task
  1559. is not currently executing.
  1560. The LART uses the same LED for both Timer LED and CPU usage LED
  1561. functions. You may choose to use both, but the Timer LED function
  1562. will overrule the CPU usage LED.
  1563. config ALIGNMENT_TRAP
  1564. bool
  1565. depends on CPU_CP15_MMU
  1566. default y if !ARCH_EBSA110
  1567. select HAVE_PROC_CPU if PROC_FS
  1568. help
  1569. ARM processors cannot fetch/store information which is not
  1570. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1571. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1572. fetch/store instructions will be emulated in software if you say
  1573. here, which has a severe performance impact. This is necessary for
  1574. correct operation of some network protocols. With an IP-only
  1575. configuration it is safe to say N, otherwise say Y.
  1576. config UACCESS_WITH_MEMCPY
  1577. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1578. depends on MMU && EXPERIMENTAL
  1579. default y if CPU_FEROCEON
  1580. help
  1581. Implement faster copy_to_user and clear_user methods for CPU
  1582. cores where a 8-word STM instruction give significantly higher
  1583. memory write throughput than a sequence of individual 32bit stores.
  1584. A possible side effect is a slight increase in scheduling latency
  1585. between threads sharing the same address space if they invoke
  1586. such copy operations with large buffers.
  1587. However, if the CPU data cache is using a write-allocate mode,
  1588. this option is unlikely to provide any performance gain.
  1589. config SECCOMP
  1590. bool
  1591. prompt "Enable seccomp to safely compute untrusted bytecode"
  1592. ---help---
  1593. This kernel feature is useful for number crunching applications
  1594. that may need to compute untrusted bytecode during their
  1595. execution. By using pipes or other transports made available to
  1596. the process as file descriptors supporting the read/write
  1597. syscalls, it's possible to isolate those applications in
  1598. their own address space using seccomp. Once seccomp is
  1599. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1600. and the task is only allowed to execute a few safe syscalls
  1601. defined by each seccomp mode.
  1602. config CC_STACKPROTECTOR
  1603. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1604. depends on EXPERIMENTAL
  1605. help
  1606. This option turns on the -fstack-protector GCC feature. This
  1607. feature puts, at the beginning of functions, a canary value on
  1608. the stack just before the return address, and validates
  1609. the value just before actually returning. Stack based buffer
  1610. overflows (that need to overwrite this return address) now also
  1611. overwrite the canary, which gets detected and the attack is then
  1612. neutralized via a kernel panic.
  1613. This feature requires gcc version 4.2 or above.
  1614. config DEPRECATED_PARAM_STRUCT
  1615. bool "Provide old way to pass kernel parameters"
  1616. help
  1617. This was deprecated in 2001 and announced to live on for 5 years.
  1618. Some old boot loaders still use this way.
  1619. endmenu
  1620. menu "Boot options"
  1621. config USE_OF
  1622. bool "Flattened Device Tree support"
  1623. select OF
  1624. select OF_EARLY_FLATTREE
  1625. select IRQ_DOMAIN
  1626. help
  1627. Include support for flattened device tree machine descriptions.
  1628. # Compressed boot loader in ROM. Yes, we really want to ask about
  1629. # TEXT and BSS so we preserve their values in the config files.
  1630. config ZBOOT_ROM_TEXT
  1631. hex "Compressed ROM boot loader base address"
  1632. default "0"
  1633. help
  1634. The physical address at which the ROM-able zImage is to be
  1635. placed in the target. Platforms which normally make use of
  1636. ROM-able zImage formats normally set this to a suitable
  1637. value in their defconfig file.
  1638. If ZBOOT_ROM is not enabled, this has no effect.
  1639. config ZBOOT_ROM_BSS
  1640. hex "Compressed ROM boot loader BSS address"
  1641. default "0"
  1642. help
  1643. The base address of an area of read/write memory in the target
  1644. for the ROM-able zImage which must be available while the
  1645. decompressor is running. It must be large enough to hold the
  1646. entire decompressed kernel plus an additional 128 KiB.
  1647. Platforms which normally make use of ROM-able zImage formats
  1648. normally set this to a suitable value in their defconfig file.
  1649. If ZBOOT_ROM is not enabled, this has no effect.
  1650. config ZBOOT_ROM
  1651. bool "Compressed boot loader in ROM/flash"
  1652. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1653. help
  1654. Say Y here if you intend to execute your compressed kernel image
  1655. (zImage) directly from ROM or flash. If unsure, say N.
  1656. choice
  1657. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1658. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1659. default ZBOOT_ROM_NONE
  1660. help
  1661. Include experimental SD/MMC loading code in the ROM-able zImage.
  1662. With this enabled it is possible to write the the ROM-able zImage
  1663. kernel image to an MMC or SD card and boot the kernel straight
  1664. from the reset vector. At reset the processor Mask ROM will load
  1665. the first part of the the ROM-able zImage which in turn loads the
  1666. rest the kernel image to RAM.
  1667. config ZBOOT_ROM_NONE
  1668. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1669. help
  1670. Do not load image from SD or MMC
  1671. config ZBOOT_ROM_MMCIF
  1672. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1673. help
  1674. Load image from MMCIF hardware block.
  1675. config ZBOOT_ROM_SH_MOBILE_SDHI
  1676. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1677. help
  1678. Load image from SDHI hardware block
  1679. endchoice
  1680. config ARM_APPENDED_DTB
  1681. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1682. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1683. help
  1684. With this option, the boot code will look for a device tree binary
  1685. (DTB) appended to zImage
  1686. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1687. This is meant as a backward compatibility convenience for those
  1688. systems with a bootloader that can't be upgraded to accommodate
  1689. the documented boot protocol using a device tree.
  1690. Beware that there is very little in terms of protection against
  1691. this option being confused by leftover garbage in memory that might
  1692. look like a DTB header after a reboot if no actual DTB is appended
  1693. to zImage. Do not leave this option active in a production kernel
  1694. if you don't intend to always append a DTB. Proper passing of the
  1695. location into r2 of a bootloader provided DTB is always preferable
  1696. to this option.
  1697. config ARM_ATAG_DTB_COMPAT
  1698. bool "Supplement the appended DTB with traditional ATAG information"
  1699. depends on ARM_APPENDED_DTB
  1700. help
  1701. Some old bootloaders can't be updated to a DTB capable one, yet
  1702. they provide ATAGs with memory configuration, the ramdisk address,
  1703. the kernel cmdline string, etc. Such information is dynamically
  1704. provided by the bootloader and can't always be stored in a static
  1705. DTB. To allow a device tree enabled kernel to be used with such
  1706. bootloaders, this option allows zImage to extract the information
  1707. from the ATAG list and store it at run time into the appended DTB.
  1708. config CMDLINE
  1709. string "Default kernel command string"
  1710. default ""
  1711. help
  1712. On some architectures (EBSA110 and CATS), there is currently no way
  1713. for the boot loader to pass arguments to the kernel. For these
  1714. architectures, you should supply some command-line options at build
  1715. time by entering them here. As a minimum, you should specify the
  1716. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1717. choice
  1718. prompt "Kernel command line type" if CMDLINE != ""
  1719. default CMDLINE_FROM_BOOTLOADER
  1720. config CMDLINE_FROM_BOOTLOADER
  1721. bool "Use bootloader kernel arguments if available"
  1722. help
  1723. Uses the command-line options passed by the boot loader. If
  1724. the boot loader doesn't provide any, the default kernel command
  1725. string provided in CMDLINE will be used.
  1726. config CMDLINE_EXTEND
  1727. bool "Extend bootloader kernel arguments"
  1728. help
  1729. The command-line arguments provided by the boot loader will be
  1730. appended to the default kernel command string.
  1731. config CMDLINE_FORCE
  1732. bool "Always use the default kernel command string"
  1733. help
  1734. Always use the default kernel command string, even if the boot
  1735. loader passes other arguments to the kernel.
  1736. This is useful if you cannot or don't want to change the
  1737. command-line options your boot loader passes to the kernel.
  1738. endchoice
  1739. config XIP_KERNEL
  1740. bool "Kernel Execute-In-Place from ROM"
  1741. depends on !ZBOOT_ROM && !ARM_LPAE
  1742. help
  1743. Execute-In-Place allows the kernel to run from non-volatile storage
  1744. directly addressable by the CPU, such as NOR flash. This saves RAM
  1745. space since the text section of the kernel is not loaded from flash
  1746. to RAM. Read-write sections, such as the data section and stack,
  1747. are still copied to RAM. The XIP kernel is not compressed since
  1748. it has to run directly from flash, so it will take more space to
  1749. store it. The flash address used to link the kernel object files,
  1750. and for storing it, is configuration dependent. Therefore, if you
  1751. say Y here, you must know the proper physical address where to
  1752. store the kernel image depending on your own flash memory usage.
  1753. Also note that the make target becomes "make xipImage" rather than
  1754. "make zImage" or "make Image". The final kernel binary to put in
  1755. ROM memory will be arch/arm/boot/xipImage.
  1756. If unsure, say N.
  1757. config XIP_PHYS_ADDR
  1758. hex "XIP Kernel Physical Location"
  1759. depends on XIP_KERNEL
  1760. default "0x00080000"
  1761. help
  1762. This is the physical address in your flash memory the kernel will
  1763. be linked for and stored to. This address is dependent on your
  1764. own flash usage.
  1765. config KEXEC
  1766. bool "Kexec system call (EXPERIMENTAL)"
  1767. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1768. help
  1769. kexec is a system call that implements the ability to shutdown your
  1770. current kernel, and to start another kernel. It is like a reboot
  1771. but it is independent of the system firmware. And like a reboot
  1772. you can start any kernel with it, not just Linux.
  1773. It is an ongoing process to be certain the hardware in a machine
  1774. is properly shutdown, so do not be surprised if this code does not
  1775. initially work for you. It may help to enable device hotplugging
  1776. support.
  1777. config ATAGS_PROC
  1778. bool "Export atags in procfs"
  1779. depends on KEXEC
  1780. default y
  1781. help
  1782. Should the atags used to boot the kernel be exported in an "atags"
  1783. file in procfs. Useful with kexec.
  1784. config CRASH_DUMP
  1785. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1786. depends on EXPERIMENTAL
  1787. help
  1788. Generate crash dump after being started by kexec. This should
  1789. be normally only set in special crash dump kernels which are
  1790. loaded in the main kernel with kexec-tools into a specially
  1791. reserved region and then later executed after a crash by
  1792. kdump/kexec. The crash dump kernel must be compiled to a
  1793. memory address not used by the main kernel
  1794. For more details see Documentation/kdump/kdump.txt
  1795. config AUTO_ZRELADDR
  1796. bool "Auto calculation of the decompressed kernel image address"
  1797. depends on !ZBOOT_ROM && !ARCH_U300
  1798. help
  1799. ZRELADDR is the physical address where the decompressed kernel
  1800. image will be placed. If AUTO_ZRELADDR is selected, the address
  1801. will be determined at run-time by masking the current IP with
  1802. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1803. from start of memory.
  1804. endmenu
  1805. menu "CPU Power Management"
  1806. if ARCH_HAS_CPUFREQ
  1807. source "drivers/cpufreq/Kconfig"
  1808. config CPU_FREQ_IMX
  1809. tristate "CPUfreq driver for i.MX CPUs"
  1810. depends on ARCH_MXC && CPU_FREQ
  1811. help
  1812. This enables the CPUfreq driver for i.MX CPUs.
  1813. config CPU_FREQ_SA1100
  1814. bool
  1815. config CPU_FREQ_SA1110
  1816. bool
  1817. config CPU_FREQ_INTEGRATOR
  1818. tristate "CPUfreq driver for ARM Integrator CPUs"
  1819. depends on ARCH_INTEGRATOR && CPU_FREQ
  1820. default y
  1821. help
  1822. This enables the CPUfreq driver for ARM Integrator CPUs.
  1823. For details, take a look at <file:Documentation/cpu-freq>.
  1824. If in doubt, say Y.
  1825. config CPU_FREQ_PXA
  1826. bool
  1827. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1828. default y
  1829. select CPU_FREQ_TABLE
  1830. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1831. config CPU_FREQ_S3C
  1832. bool
  1833. help
  1834. Internal configuration node for common cpufreq on Samsung SoC
  1835. config CPU_FREQ_S3C24XX
  1836. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1837. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1838. select CPU_FREQ_S3C
  1839. help
  1840. This enables the CPUfreq driver for the Samsung S3C24XX family
  1841. of CPUs.
  1842. For details, take a look at <file:Documentation/cpu-freq>.
  1843. If in doubt, say N.
  1844. config CPU_FREQ_S3C24XX_PLL
  1845. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1846. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1847. help
  1848. Compile in support for changing the PLL frequency from the
  1849. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1850. after a frequency change, so by default it is not enabled.
  1851. This also means that the PLL tables for the selected CPU(s) will
  1852. be built which may increase the size of the kernel image.
  1853. config CPU_FREQ_S3C24XX_DEBUG
  1854. bool "Debug CPUfreq Samsung driver core"
  1855. depends on CPU_FREQ_S3C24XX
  1856. help
  1857. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1858. config CPU_FREQ_S3C24XX_IODEBUG
  1859. bool "Debug CPUfreq Samsung driver IO timing"
  1860. depends on CPU_FREQ_S3C24XX
  1861. help
  1862. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1863. config CPU_FREQ_S3C24XX_DEBUGFS
  1864. bool "Export debugfs for CPUFreq"
  1865. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1866. help
  1867. Export status information via debugfs.
  1868. endif
  1869. source "drivers/cpuidle/Kconfig"
  1870. endmenu
  1871. menu "Floating point emulation"
  1872. comment "At least one emulation must be selected"
  1873. config FPE_NWFPE
  1874. bool "NWFPE math emulation"
  1875. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1876. ---help---
  1877. Say Y to include the NWFPE floating point emulator in the kernel.
  1878. This is necessary to run most binaries. Linux does not currently
  1879. support floating point hardware so you need to say Y here even if
  1880. your machine has an FPA or floating point co-processor podule.
  1881. You may say N here if you are going to load the Acorn FPEmulator
  1882. early in the bootup.
  1883. config FPE_NWFPE_XP
  1884. bool "Support extended precision"
  1885. depends on FPE_NWFPE
  1886. help
  1887. Say Y to include 80-bit support in the kernel floating-point
  1888. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1889. Note that gcc does not generate 80-bit operations by default,
  1890. so in most cases this option only enlarges the size of the
  1891. floating point emulator without any good reason.
  1892. You almost surely want to say N here.
  1893. config FPE_FASTFPE
  1894. bool "FastFPE math emulation (EXPERIMENTAL)"
  1895. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1896. ---help---
  1897. Say Y here to include the FAST floating point emulator in the kernel.
  1898. This is an experimental much faster emulator which now also has full
  1899. precision for the mantissa. It does not support any exceptions.
  1900. It is very simple, and approximately 3-6 times faster than NWFPE.
  1901. It should be sufficient for most programs. It may be not suitable
  1902. for scientific calculations, but you have to check this for yourself.
  1903. If you do not feel you need a faster FP emulation you should better
  1904. choose NWFPE.
  1905. config VFP
  1906. bool "VFP-format floating point maths"
  1907. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1908. help
  1909. Say Y to include VFP support code in the kernel. This is needed
  1910. if your hardware includes a VFP unit.
  1911. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1912. release notes and additional status information.
  1913. Say N if your target does not have VFP hardware.
  1914. config VFPv3
  1915. bool
  1916. depends on VFP
  1917. default y if CPU_V7
  1918. config NEON
  1919. bool "Advanced SIMD (NEON) Extension support"
  1920. depends on VFPv3 && CPU_V7
  1921. help
  1922. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1923. Extension.
  1924. endmenu
  1925. menu "Userspace binary formats"
  1926. source "fs/Kconfig.binfmt"
  1927. config ARTHUR
  1928. tristate "RISC OS personality"
  1929. depends on !AEABI
  1930. help
  1931. Say Y here to include the kernel code necessary if you want to run
  1932. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1933. experimental; if this sounds frightening, say N and sleep in peace.
  1934. You can also say M here to compile this support as a module (which
  1935. will be called arthur).
  1936. endmenu
  1937. menu "Power management options"
  1938. source "kernel/power/Kconfig"
  1939. config ARCH_SUSPEND_POSSIBLE
  1940. depends on !ARCH_S5PC100
  1941. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1942. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1943. def_bool y
  1944. config ARM_CPU_SUSPEND
  1945. def_bool PM_SLEEP
  1946. endmenu
  1947. source "net/Kconfig"
  1948. source "drivers/Kconfig"
  1949. source "fs/Kconfig"
  1950. source "arch/arm/Kconfig.debug"
  1951. source "security/Kconfig"
  1952. source "crypto/Kconfig"
  1953. source "lib/Kconfig"