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. select GENERIC_SMP_IDLE_THREAD
  38. help
  39. The ARM series is a line of low-power-consumption RISC chip designs
  40. licensed by ARM Ltd and targeted at embedded applications and
  41. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  42. manufactured, but legacy ARM-based PC hardware remains popular in
  43. Europe. There is an ARM Linux project with a web page at
  44. <http://www.arm.linux.org.uk/>.
  45. config ARM_HAS_SG_CHAIN
  46. bool
  47. config HAVE_PWM
  48. bool
  49. config MIGHT_HAVE_PCI
  50. bool
  51. config SYS_SUPPORTS_APM_EMULATION
  52. bool
  53. config GENERIC_GPIO
  54. bool
  55. config ARCH_USES_GETTIMEOFFSET
  56. bool
  57. default n
  58. config GENERIC_CLOCKEVENTS
  59. bool
  60. config GENERIC_CLOCKEVENTS_BROADCAST
  61. bool
  62. depends on GENERIC_CLOCKEVENTS
  63. default y if SMP
  64. config KTIME_SCALAR
  65. bool
  66. default y
  67. config HAVE_TCM
  68. bool
  69. select GENERIC_ALLOCATOR
  70. config HAVE_PROC_CPU
  71. bool
  72. config NO_IOPORT
  73. bool
  74. config EISA
  75. bool
  76. ---help---
  77. The Extended Industry Standard Architecture (EISA) bus was
  78. developed as an open alternative to the IBM MicroChannel bus.
  79. The EISA bus provided some of the features of the IBM MicroChannel
  80. bus while maintaining backward compatibility with cards made for
  81. the older ISA bus. The EISA bus saw limited use between 1988 and
  82. 1995 when it was made obsolete by the PCI bus.
  83. Say Y here if you are building a kernel for an EISA-based machine.
  84. Otherwise, say N.
  85. config SBUS
  86. bool
  87. config MCA
  88. bool
  89. help
  90. MicroChannel Architecture is found in some IBM PS/2 machines and
  91. laptops. It is a bus system similar to PCI or ISA. See
  92. <file:Documentation/mca.txt> (and especially the web page given
  93. there) before attempting to build an MCA bus kernel.
  94. config STACKTRACE_SUPPORT
  95. bool
  96. default y
  97. config HAVE_LATENCYTOP_SUPPORT
  98. bool
  99. depends on !SMP
  100. default y
  101. config LOCKDEP_SUPPORT
  102. bool
  103. default y
  104. config TRACE_IRQFLAGS_SUPPORT
  105. bool
  106. default y
  107. config HARDIRQS_SW_RESEND
  108. bool
  109. default y
  110. config GENERIC_IRQ_PROBE
  111. bool
  112. default y
  113. config GENERIC_LOCKBREAK
  114. bool
  115. default y
  116. depends on SMP && PREEMPT
  117. config RWSEM_GENERIC_SPINLOCK
  118. bool
  119. default y
  120. config RWSEM_XCHGADD_ALGORITHM
  121. bool
  122. config ARCH_HAS_ILOG2_U32
  123. bool
  124. config ARCH_HAS_ILOG2_U64
  125. bool
  126. config ARCH_HAS_CPUFREQ
  127. bool
  128. help
  129. Internal node to signify that the ARCH has CPUFREQ support
  130. and that the relevant menu configurations are displayed for
  131. it.
  132. config ARCH_HAS_CPU_IDLE_WAIT
  133. def_bool y
  134. config GENERIC_HWEIGHT
  135. bool
  136. default y
  137. config GENERIC_CALIBRATE_DELAY
  138. bool
  139. default y
  140. config ARCH_MAY_HAVE_PC_FDC
  141. bool
  142. config ZONE_DMA
  143. bool
  144. config NEED_DMA_MAP_STATE
  145. def_bool y
  146. config ARCH_HAS_DMA_SET_COHERENT_MASK
  147. bool
  148. config GENERIC_ISA_DMA
  149. bool
  150. config FIQ
  151. bool
  152. config NEED_RET_TO_USER
  153. bool
  154. config ARCH_MTD_XIP
  155. bool
  156. config VECTORS_BASE
  157. hex
  158. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  159. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  160. default 0x00000000
  161. help
  162. The base address of exception vectors.
  163. config ARM_PATCH_PHYS_VIRT
  164. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  165. default y
  166. depends on !XIP_KERNEL && MMU
  167. depends on !ARCH_REALVIEW || !SPARSEMEM
  168. help
  169. Patch phys-to-virt and virt-to-phys translation functions at
  170. boot and module load time according to the position of the
  171. kernel in system memory.
  172. This can only be used with non-XIP MMU kernels where the base
  173. of physical memory is at a 16MB boundary.
  174. Only disable this option if you know that you do not require
  175. this feature (eg, building a kernel for a single machine) and
  176. you need to shrink the kernel to the minimal size.
  177. config NEED_MACH_IO_H
  178. bool
  179. help
  180. Select this when mach/io.h is required to provide special
  181. definitions for this platform. The need for mach/io.h should
  182. be avoided when possible.
  183. config NEED_MACH_MEMORY_H
  184. bool
  185. help
  186. Select this when mach/memory.h is required to provide special
  187. definitions for this platform. The need for mach/memory.h should
  188. be avoided when possible.
  189. config PHYS_OFFSET
  190. hex "Physical address of main memory" if MMU
  191. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  192. default DRAM_BASE if !MMU
  193. help
  194. Please provide the physical address corresponding to the
  195. location of main memory in your system.
  196. config GENERIC_BUG
  197. def_bool y
  198. depends on BUG
  199. source "init/Kconfig"
  200. source "kernel/Kconfig.freezer"
  201. menu "System Type"
  202. config MMU
  203. bool "MMU-based Paged Memory Management Support"
  204. default y
  205. help
  206. Select if you want MMU-based virtualised addressing space
  207. support by paged memory management. If unsure, say 'Y'.
  208. #
  209. # The "ARM system type" choice list is ordered alphabetically by option
  210. # text. Please add new entries in the option alphabetic order.
  211. #
  212. choice
  213. prompt "ARM system type"
  214. default ARCH_VERSATILE
  215. config ARCH_INTEGRATOR
  216. bool "ARM Ltd. Integrator family"
  217. select ARM_AMBA
  218. select ARCH_HAS_CPUFREQ
  219. select CLKDEV_LOOKUP
  220. select HAVE_MACH_CLKDEV
  221. select HAVE_TCM
  222. select ICST
  223. select GENERIC_CLOCKEVENTS
  224. select PLAT_VERSATILE
  225. select PLAT_VERSATILE_FPGA_IRQ
  226. select NEED_MACH_IO_H
  227. select NEED_MACH_MEMORY_H
  228. select SPARSE_IRQ
  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_411920
  1017. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1018. depends on CPU_V6 || CPU_V6K
  1019. help
  1020. Invalidation of the Instruction Cache operation can
  1021. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1022. It does not affect the MPCore. This option enables the ARM Ltd.
  1023. recommended workaround.
  1024. config ARM_ERRATA_430973
  1025. bool "ARM errata: Stale prediction on replaced interworking branch"
  1026. depends on CPU_V7
  1027. help
  1028. This option enables the workaround for the 430973 Cortex-A8
  1029. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1030. interworking branch is replaced with another code sequence at the
  1031. same virtual address, whether due to self-modifying code or virtual
  1032. to physical address re-mapping, Cortex-A8 does not recover from the
  1033. stale interworking branch prediction. This results in Cortex-A8
  1034. executing the new code sequence in the incorrect ARM or Thumb state.
  1035. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1036. and also flushes the branch target cache at every context switch.
  1037. Note that setting specific bits in the ACTLR register may not be
  1038. available in non-secure mode.
  1039. config ARM_ERRATA_458693
  1040. bool "ARM errata: Processor deadlock when a false hazard is created"
  1041. depends on CPU_V7
  1042. help
  1043. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1044. erratum. For very specific sequences of memory operations, it is
  1045. possible for a hazard condition intended for a cache line to instead
  1046. be incorrectly associated with a different cache line. This false
  1047. hazard might then cause a processor deadlock. The workaround enables
  1048. the L1 caching of the NEON accesses and disables the PLD instruction
  1049. in the ACTLR register. Note that setting specific bits in the ACTLR
  1050. register may not be available in non-secure mode.
  1051. config ARM_ERRATA_460075
  1052. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1053. depends on CPU_V7
  1054. help
  1055. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1056. erratum. Any asynchronous access to the L2 cache may encounter a
  1057. situation in which recent store transactions to the L2 cache are lost
  1058. and overwritten with stale memory contents from external memory. The
  1059. workaround disables the write-allocate mode for the L2 cache via the
  1060. ACTLR register. Note that setting specific bits in the ACTLR register
  1061. may not be available in non-secure mode.
  1062. config ARM_ERRATA_742230
  1063. bool "ARM errata: DMB operation may be faulty"
  1064. depends on CPU_V7 && SMP
  1065. help
  1066. This option enables the workaround for the 742230 Cortex-A9
  1067. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1068. between two write operations may not ensure the correct visibility
  1069. ordering of the two writes. This workaround sets a specific bit in
  1070. the diagnostic register of the Cortex-A9 which causes the DMB
  1071. instruction to behave as a DSB, ensuring the correct behaviour of
  1072. the two writes.
  1073. config ARM_ERRATA_742231
  1074. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1075. depends on CPU_V7 && SMP
  1076. help
  1077. This option enables the workaround for the 742231 Cortex-A9
  1078. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1079. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1080. accessing some data located in the same cache line, may get corrupted
  1081. data due to bad handling of the address hazard when the line gets
  1082. replaced from one of the CPUs at the same time as another CPU is
  1083. accessing it. This workaround sets specific bits in the diagnostic
  1084. register of the Cortex-A9 which reduces the linefill issuing
  1085. capabilities of the processor.
  1086. config PL310_ERRATA_588369
  1087. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1088. depends on CACHE_L2X0
  1089. help
  1090. The PL310 L2 cache controller implements three types of Clean &
  1091. Invalidate maintenance operations: by Physical Address
  1092. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1093. They are architecturally defined to behave as the execution of a
  1094. clean operation followed immediately by an invalidate operation,
  1095. both performing to the same memory location. This functionality
  1096. is not correctly implemented in PL310 as clean lines are not
  1097. invalidated as a result of these operations.
  1098. config ARM_ERRATA_720789
  1099. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1100. depends on CPU_V7
  1101. help
  1102. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1103. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1104. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1105. As a consequence of this erratum, some TLB entries which should be
  1106. invalidated are not, resulting in an incoherency in the system page
  1107. tables. The workaround changes the TLB flushing routines to invalidate
  1108. entries regardless of the ASID.
  1109. config PL310_ERRATA_727915
  1110. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1111. depends on CACHE_L2X0
  1112. help
  1113. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1114. operation (offset 0x7FC). This operation runs in background so that
  1115. PL310 can handle normal accesses while it is in progress. Under very
  1116. rare circumstances, due to this erratum, write data can be lost when
  1117. PL310 treats a cacheable write transaction during a Clean &
  1118. Invalidate by Way operation.
  1119. config ARM_ERRATA_743622
  1120. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1121. depends on CPU_V7
  1122. help
  1123. This option enables the workaround for the 743622 Cortex-A9
  1124. (r2p*) erratum. Under very rare conditions, a faulty
  1125. optimisation in the Cortex-A9 Store Buffer may lead to data
  1126. corruption. This workaround sets a specific bit in the diagnostic
  1127. register of the Cortex-A9 which disables the Store Buffer
  1128. optimisation, preventing the defect from occurring. This has no
  1129. visible impact on the overall performance or power consumption of the
  1130. processor.
  1131. config ARM_ERRATA_751472
  1132. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1133. depends on CPU_V7
  1134. help
  1135. This option enables the workaround for the 751472 Cortex-A9 (prior
  1136. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1137. completion of a following broadcasted operation if the second
  1138. operation is received by a CPU before the ICIALLUIS has completed,
  1139. potentially leading to corrupted entries in the cache or TLB.
  1140. config PL310_ERRATA_753970
  1141. bool "PL310 errata: cache sync operation may be faulty"
  1142. depends on CACHE_PL310
  1143. help
  1144. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1145. Under some condition the effect of cache sync operation on
  1146. the store buffer still remains when the operation completes.
  1147. This means that the store buffer is always asked to drain and
  1148. this prevents it from merging any further writes. The workaround
  1149. is to replace the normal offset of cache sync operation (0x730)
  1150. by another offset targeting an unmapped PL310 register 0x740.
  1151. This has the same effect as the cache sync operation: store buffer
  1152. drain and waiting for all buffers empty.
  1153. config ARM_ERRATA_754322
  1154. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1155. depends on CPU_V7
  1156. help
  1157. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1158. r3p*) erratum. A speculative memory access may cause a page table walk
  1159. which starts prior to an ASID switch but completes afterwards. This
  1160. can populate the micro-TLB with a stale entry which may be hit with
  1161. the new ASID. This workaround places two dsb instructions in the mm
  1162. switching code so that no page table walks can cross the ASID switch.
  1163. config ARM_ERRATA_754327
  1164. bool "ARM errata: no automatic Store Buffer drain"
  1165. depends on CPU_V7 && SMP
  1166. help
  1167. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1168. r2p0) erratum. The Store Buffer does not have any automatic draining
  1169. mechanism and therefore a livelock may occur if an external agent
  1170. continuously polls a memory location waiting to observe an update.
  1171. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1172. written polling loops from denying visibility of updates to memory.
  1173. config ARM_ERRATA_364296
  1174. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1175. depends on CPU_V6 && !SMP
  1176. help
  1177. This options enables the workaround for the 364296 ARM1136
  1178. r0p2 erratum (possible cache data corruption with
  1179. hit-under-miss enabled). It sets the undocumented bit 31 in
  1180. the auxiliary control register and the FI bit in the control
  1181. register, thus disabling hit-under-miss without putting the
  1182. processor into full low interrupt latency mode. ARM11MPCore
  1183. is not affected.
  1184. config ARM_ERRATA_764369
  1185. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1186. depends on CPU_V7 && SMP
  1187. help
  1188. This option enables the workaround for erratum 764369
  1189. affecting Cortex-A9 MPCore with two or more processors (all
  1190. current revisions). Under certain timing circumstances, a data
  1191. cache line maintenance operation by MVA targeting an Inner
  1192. Shareable memory region may fail to proceed up to either the
  1193. Point of Coherency or to the Point of Unification of the
  1194. system. This workaround adds a DSB instruction before the
  1195. relevant cache maintenance functions and sets a specific bit
  1196. in the diagnostic control register of the SCU.
  1197. config PL310_ERRATA_769419
  1198. bool "PL310 errata: no automatic Store Buffer drain"
  1199. depends on CACHE_L2X0
  1200. help
  1201. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1202. not automatically drain. This can cause normal, non-cacheable
  1203. writes to be retained when the memory system is idle, leading
  1204. to suboptimal I/O performance for drivers using coherent DMA.
  1205. This option adds a write barrier to the cpu_idle loop so that,
  1206. on systems with an outer cache, the store buffer is drained
  1207. explicitly.
  1208. endmenu
  1209. source "arch/arm/common/Kconfig"
  1210. menu "Bus support"
  1211. config ARM_AMBA
  1212. bool
  1213. config ISA
  1214. bool
  1215. help
  1216. Find out whether you have ISA slots on your motherboard. ISA is the
  1217. name of a bus system, i.e. the way the CPU talks to the other stuff
  1218. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1219. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1220. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1221. # Select ISA DMA controller support
  1222. config ISA_DMA
  1223. bool
  1224. select ISA_DMA_API
  1225. # Select ISA DMA interface
  1226. config ISA_DMA_API
  1227. bool
  1228. config PCI
  1229. bool "PCI support" if MIGHT_HAVE_PCI
  1230. help
  1231. Find out whether you have a PCI motherboard. PCI is the name of a
  1232. bus system, i.e. the way the CPU talks to the other stuff inside
  1233. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1234. VESA. If you have PCI, say Y, otherwise N.
  1235. config PCI_DOMAINS
  1236. bool
  1237. depends on PCI
  1238. config PCI_NANOENGINE
  1239. bool "BSE nanoEngine PCI support"
  1240. depends on SA1100_NANOENGINE
  1241. help
  1242. Enable PCI on the BSE nanoEngine board.
  1243. config PCI_SYSCALL
  1244. def_bool PCI
  1245. # Select the host bridge type
  1246. config PCI_HOST_VIA82C505
  1247. bool
  1248. depends on PCI && ARCH_SHARK
  1249. default y
  1250. config PCI_HOST_ITE8152
  1251. bool
  1252. depends on PCI && MACH_ARMCORE
  1253. default y
  1254. select DMABOUNCE
  1255. source "drivers/pci/Kconfig"
  1256. source "drivers/pcmcia/Kconfig"
  1257. endmenu
  1258. menu "Kernel Features"
  1259. source "kernel/time/Kconfig"
  1260. config HAVE_SMP
  1261. bool
  1262. help
  1263. This option should be selected by machines which have an SMP-
  1264. capable CPU.
  1265. The only effect of this option is to make the SMP-related
  1266. options available to the user for configuration.
  1267. config SMP
  1268. bool "Symmetric Multi-Processing"
  1269. depends on CPU_V6K || CPU_V7
  1270. depends on GENERIC_CLOCKEVENTS
  1271. depends on HAVE_SMP
  1272. depends on MMU
  1273. select USE_GENERIC_SMP_HELPERS
  1274. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1275. help
  1276. This enables support for systems with more than one CPU. If you have
  1277. a system with only one CPU, like most personal computers, say N. If
  1278. you have a system with more than one CPU, say Y.
  1279. If you say N here, the kernel will run on single and multiprocessor
  1280. machines, but will use only one CPU of a multiprocessor machine. If
  1281. you say Y here, the kernel will run on many, but not all, single
  1282. processor machines. On a single processor machine, the kernel will
  1283. run faster if you say N here.
  1284. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1285. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1286. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1287. If you don't know what to do here, say N.
  1288. config SMP_ON_UP
  1289. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1290. depends on EXPERIMENTAL
  1291. depends on SMP && !XIP_KERNEL
  1292. default y
  1293. help
  1294. SMP kernels contain instructions which fail on non-SMP processors.
  1295. Enabling this option allows the kernel to modify itself to make
  1296. these instructions safe. Disabling it allows about 1K of space
  1297. savings.
  1298. If you don't know what to do here, say Y.
  1299. config ARM_CPU_TOPOLOGY
  1300. bool "Support cpu topology definition"
  1301. depends on SMP && CPU_V7
  1302. default y
  1303. help
  1304. Support ARM cpu topology definition. The MPIDR register defines
  1305. affinity between processors which is then used to describe the cpu
  1306. topology of an ARM System.
  1307. config SCHED_MC
  1308. bool "Multi-core scheduler support"
  1309. depends on ARM_CPU_TOPOLOGY
  1310. help
  1311. Multi-core scheduler support improves the CPU scheduler's decision
  1312. making when dealing with multi-core CPU chips at a cost of slightly
  1313. increased overhead in some places. If unsure say N here.
  1314. config SCHED_SMT
  1315. bool "SMT scheduler support"
  1316. depends on ARM_CPU_TOPOLOGY
  1317. help
  1318. Improves the CPU scheduler's decision making when dealing with
  1319. MultiThreading at a cost of slightly increased overhead in some
  1320. places. If unsure say N here.
  1321. config HAVE_ARM_SCU
  1322. bool
  1323. help
  1324. This option enables support for the ARM system coherency unit
  1325. config HAVE_ARM_TWD
  1326. bool
  1327. depends on SMP
  1328. select TICK_ONESHOT
  1329. help
  1330. This options enables support for the ARM timer and watchdog unit
  1331. choice
  1332. prompt "Memory split"
  1333. default VMSPLIT_3G
  1334. help
  1335. Select the desired split between kernel and user memory.
  1336. If you are not absolutely sure what you are doing, leave this
  1337. option alone!
  1338. config VMSPLIT_3G
  1339. bool "3G/1G user/kernel split"
  1340. config VMSPLIT_2G
  1341. bool "2G/2G user/kernel split"
  1342. config VMSPLIT_1G
  1343. bool "1G/3G user/kernel split"
  1344. endchoice
  1345. config PAGE_OFFSET
  1346. hex
  1347. default 0x40000000 if VMSPLIT_1G
  1348. default 0x80000000 if VMSPLIT_2G
  1349. default 0xC0000000
  1350. config NR_CPUS
  1351. int "Maximum number of CPUs (2-32)"
  1352. range 2 32
  1353. depends on SMP
  1354. default "4"
  1355. config HOTPLUG_CPU
  1356. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1357. depends on SMP && HOTPLUG && EXPERIMENTAL
  1358. help
  1359. Say Y here to experiment with turning CPUs off and on. CPUs
  1360. can be controlled through /sys/devices/system/cpu.
  1361. config LOCAL_TIMERS
  1362. bool "Use local timer interrupts"
  1363. depends on SMP
  1364. default y
  1365. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1366. help
  1367. Enable support for local timers on SMP platforms, rather then the
  1368. legacy IPI broadcast method. Local timers allows the system
  1369. accounting to be spread across the timer interval, preventing a
  1370. "thundering herd" at every timer tick.
  1371. config ARCH_NR_GPIO
  1372. int
  1373. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1374. default 355 if ARCH_U8500
  1375. default 264 if MACH_H4700
  1376. default 0
  1377. help
  1378. Maximum number of GPIOs in the system.
  1379. If unsure, leave the default value.
  1380. source kernel/Kconfig.preempt
  1381. config HZ
  1382. int
  1383. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1384. ARCH_S5PV210 || ARCH_EXYNOS4
  1385. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1386. default AT91_TIMER_HZ if ARCH_AT91
  1387. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1388. default 100
  1389. config THUMB2_KERNEL
  1390. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1391. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1392. select AEABI
  1393. select ARM_ASM_UNIFIED
  1394. select ARM_UNWIND
  1395. help
  1396. By enabling this option, the kernel will be compiled in
  1397. Thumb-2 mode. A compiler/assembler that understand the unified
  1398. ARM-Thumb syntax is needed.
  1399. If unsure, say N.
  1400. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1401. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1402. depends on THUMB2_KERNEL && MODULES
  1403. default y
  1404. help
  1405. Various binutils versions can resolve Thumb-2 branches to
  1406. locally-defined, preemptible global symbols as short-range "b.n"
  1407. branch instructions.
  1408. This is a problem, because there's no guarantee the final
  1409. destination of the symbol, or any candidate locations for a
  1410. trampoline, are within range of the branch. For this reason, the
  1411. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1412. relocation in modules at all, and it makes little sense to add
  1413. support.
  1414. The symptom is that the kernel fails with an "unsupported
  1415. relocation" error when loading some modules.
  1416. Until fixed tools are available, passing
  1417. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1418. code which hits this problem, at the cost of a bit of extra runtime
  1419. stack usage in some cases.
  1420. The problem is described in more detail at:
  1421. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1422. Only Thumb-2 kernels are affected.
  1423. Unless you are sure your tools don't have this problem, say Y.
  1424. config ARM_ASM_UNIFIED
  1425. bool
  1426. config AEABI
  1427. bool "Use the ARM EABI to compile the kernel"
  1428. help
  1429. This option allows for the kernel to be compiled using the latest
  1430. ARM ABI (aka EABI). This is only useful if you are using a user
  1431. space environment that is also compiled with EABI.
  1432. Since there are major incompatibilities between the legacy ABI and
  1433. EABI, especially with regard to structure member alignment, this
  1434. option also changes the kernel syscall calling convention to
  1435. disambiguate both ABIs and allow for backward compatibility support
  1436. (selected with CONFIG_OABI_COMPAT).
  1437. To use this you need GCC version 4.0.0 or later.
  1438. config OABI_COMPAT
  1439. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1440. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1441. default y
  1442. help
  1443. This option preserves the old syscall interface along with the
  1444. new (ARM EABI) one. It also provides a compatibility layer to
  1445. intercept syscalls that have structure arguments which layout
  1446. in memory differs between the legacy ABI and the new ARM EABI
  1447. (only for non "thumb" binaries). This option adds a tiny
  1448. overhead to all syscalls and produces a slightly larger kernel.
  1449. If you know you'll be using only pure EABI user space then you
  1450. can say N here. If this option is not selected and you attempt
  1451. to execute a legacy ABI binary then the result will be
  1452. UNPREDICTABLE (in fact it can be predicted that it won't work
  1453. at all). If in doubt say Y.
  1454. config ARCH_HAS_HOLES_MEMORYMODEL
  1455. bool
  1456. config ARCH_SPARSEMEM_ENABLE
  1457. bool
  1458. config ARCH_SPARSEMEM_DEFAULT
  1459. def_bool ARCH_SPARSEMEM_ENABLE
  1460. config ARCH_SELECT_MEMORY_MODEL
  1461. def_bool ARCH_SPARSEMEM_ENABLE
  1462. config HAVE_ARCH_PFN_VALID
  1463. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1464. config HIGHMEM
  1465. bool "High Memory Support"
  1466. depends on MMU
  1467. help
  1468. The address space of ARM processors is only 4 Gigabytes large
  1469. and it has to accommodate user address space, kernel address
  1470. space as well as some memory mapped IO. That means that, if you
  1471. have a large amount of physical memory and/or IO, not all of the
  1472. memory can be "permanently mapped" by the kernel. The physical
  1473. memory that is not permanently mapped is called "high memory".
  1474. Depending on the selected kernel/user memory split, minimum
  1475. vmalloc space and actual amount of RAM, you may not need this
  1476. option which should result in a slightly faster kernel.
  1477. If unsure, say n.
  1478. config HIGHPTE
  1479. bool "Allocate 2nd-level pagetables from highmem"
  1480. depends on HIGHMEM
  1481. config HW_PERF_EVENTS
  1482. bool "Enable hardware performance counter support for perf events"
  1483. depends on PERF_EVENTS && CPU_HAS_PMU
  1484. default y
  1485. help
  1486. Enable hardware performance counter support for perf events. If
  1487. disabled, perf events will use software events only.
  1488. source "mm/Kconfig"
  1489. config FORCE_MAX_ZONEORDER
  1490. int "Maximum zone order" if ARCH_SHMOBILE
  1491. range 11 64 if ARCH_SHMOBILE
  1492. default "9" if SA1111
  1493. default "11"
  1494. help
  1495. The kernel memory allocator divides physically contiguous memory
  1496. blocks into "zones", where each zone is a power of two number of
  1497. pages. This option selects the largest power of two that the kernel
  1498. keeps in the memory allocator. If you need to allocate very large
  1499. blocks of physically contiguous memory, then you may need to
  1500. increase this value.
  1501. This config option is actually maximum order plus one. For example,
  1502. a value of 11 means that the largest free memory block is 2^10 pages.
  1503. config LEDS
  1504. bool "Timer and CPU usage LEDs"
  1505. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1506. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1507. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1508. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1509. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1510. ARCH_AT91 || ARCH_DAVINCI || \
  1511. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1512. help
  1513. If you say Y here, the LEDs on your machine will be used
  1514. to provide useful information about your current system status.
  1515. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1516. be able to select which LEDs are active using the options below. If
  1517. you are compiling a kernel for the EBSA-110 or the LART however, the
  1518. red LED will simply flash regularly to indicate that the system is
  1519. still functional. It is safe to say Y here if you have a CATS
  1520. system, but the driver will do nothing.
  1521. config LEDS_TIMER
  1522. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1523. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1524. || MACH_OMAP_PERSEUS2
  1525. depends on LEDS
  1526. depends on !GENERIC_CLOCKEVENTS
  1527. default y if ARCH_EBSA110
  1528. help
  1529. If you say Y here, one of the system LEDs (the green one on the
  1530. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1531. will flash regularly to indicate that the system is still
  1532. operational. This is mainly useful to kernel hackers who are
  1533. debugging unstable kernels.
  1534. The LART uses the same LED for both Timer LED and CPU usage LED
  1535. functions. You may choose to use both, but the Timer LED function
  1536. will overrule the CPU usage LED.
  1537. config LEDS_CPU
  1538. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1539. !ARCH_OMAP) \
  1540. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1541. || MACH_OMAP_PERSEUS2
  1542. depends on LEDS
  1543. help
  1544. If you say Y here, the red LED will be used to give a good real
  1545. time indication of CPU usage, by lighting whenever the idle task
  1546. is not currently executing.
  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 ALIGNMENT_TRAP
  1551. bool
  1552. depends on CPU_CP15_MMU
  1553. default y if !ARCH_EBSA110
  1554. select HAVE_PROC_CPU if PROC_FS
  1555. help
  1556. ARM processors cannot fetch/store information which is not
  1557. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1558. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1559. fetch/store instructions will be emulated in software if you say
  1560. here, which has a severe performance impact. This is necessary for
  1561. correct operation of some network protocols. With an IP-only
  1562. configuration it is safe to say N, otherwise say Y.
  1563. config UACCESS_WITH_MEMCPY
  1564. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1565. depends on MMU && EXPERIMENTAL
  1566. default y if CPU_FEROCEON
  1567. help
  1568. Implement faster copy_to_user and clear_user methods for CPU
  1569. cores where a 8-word STM instruction give significantly higher
  1570. memory write throughput than a sequence of individual 32bit stores.
  1571. A possible side effect is a slight increase in scheduling latency
  1572. between threads sharing the same address space if they invoke
  1573. such copy operations with large buffers.
  1574. However, if the CPU data cache is using a write-allocate mode,
  1575. this option is unlikely to provide any performance gain.
  1576. config SECCOMP
  1577. bool
  1578. prompt "Enable seccomp to safely compute untrusted bytecode"
  1579. ---help---
  1580. This kernel feature is useful for number crunching applications
  1581. that may need to compute untrusted bytecode during their
  1582. execution. By using pipes or other transports made available to
  1583. the process as file descriptors supporting the read/write
  1584. syscalls, it's possible to isolate those applications in
  1585. their own address space using seccomp. Once seccomp is
  1586. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1587. and the task is only allowed to execute a few safe syscalls
  1588. defined by each seccomp mode.
  1589. config CC_STACKPROTECTOR
  1590. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1591. depends on EXPERIMENTAL
  1592. help
  1593. This option turns on the -fstack-protector GCC feature. This
  1594. feature puts, at the beginning of functions, a canary value on
  1595. the stack just before the return address, and validates
  1596. the value just before actually returning. Stack based buffer
  1597. overflows (that need to overwrite this return address) now also
  1598. overwrite the canary, which gets detected and the attack is then
  1599. neutralized via a kernel panic.
  1600. This feature requires gcc version 4.2 or above.
  1601. config DEPRECATED_PARAM_STRUCT
  1602. bool "Provide old way to pass kernel parameters"
  1603. help
  1604. This was deprecated in 2001 and announced to live on for 5 years.
  1605. Some old boot loaders still use this way.
  1606. endmenu
  1607. menu "Boot options"
  1608. config USE_OF
  1609. bool "Flattened Device Tree support"
  1610. select OF
  1611. select OF_EARLY_FLATTREE
  1612. select IRQ_DOMAIN
  1613. help
  1614. Include support for flattened device tree machine descriptions.
  1615. # Compressed boot loader in ROM. Yes, we really want to ask about
  1616. # TEXT and BSS so we preserve their values in the config files.
  1617. config ZBOOT_ROM_TEXT
  1618. hex "Compressed ROM boot loader base address"
  1619. default "0"
  1620. help
  1621. The physical address at which the ROM-able zImage is to be
  1622. placed in the target. Platforms which normally make use of
  1623. ROM-able zImage formats normally set this to a suitable
  1624. value in their defconfig file.
  1625. If ZBOOT_ROM is not enabled, this has no effect.
  1626. config ZBOOT_ROM_BSS
  1627. hex "Compressed ROM boot loader BSS address"
  1628. default "0"
  1629. help
  1630. The base address of an area of read/write memory in the target
  1631. for the ROM-able zImage which must be available while the
  1632. decompressor is running. It must be large enough to hold the
  1633. entire decompressed kernel plus an additional 128 KiB.
  1634. Platforms which normally make use of ROM-able zImage formats
  1635. normally set this to a suitable value in their defconfig file.
  1636. If ZBOOT_ROM is not enabled, this has no effect.
  1637. config ZBOOT_ROM
  1638. bool "Compressed boot loader in ROM/flash"
  1639. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1640. help
  1641. Say Y here if you intend to execute your compressed kernel image
  1642. (zImage) directly from ROM or flash. If unsure, say N.
  1643. choice
  1644. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1645. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1646. default ZBOOT_ROM_NONE
  1647. help
  1648. Include experimental SD/MMC loading code in the ROM-able zImage.
  1649. With this enabled it is possible to write the the ROM-able zImage
  1650. kernel image to an MMC or SD card and boot the kernel straight
  1651. from the reset vector. At reset the processor Mask ROM will load
  1652. the first part of the the ROM-able zImage which in turn loads the
  1653. rest the kernel image to RAM.
  1654. config ZBOOT_ROM_NONE
  1655. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1656. help
  1657. Do not load image from SD or MMC
  1658. config ZBOOT_ROM_MMCIF
  1659. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1660. help
  1661. Load image from MMCIF hardware block.
  1662. config ZBOOT_ROM_SH_MOBILE_SDHI
  1663. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1664. help
  1665. Load image from SDHI hardware block
  1666. endchoice
  1667. config ARM_APPENDED_DTB
  1668. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1669. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1670. help
  1671. With this option, the boot code will look for a device tree binary
  1672. (DTB) appended to zImage
  1673. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1674. This is meant as a backward compatibility convenience for those
  1675. systems with a bootloader that can't be upgraded to accommodate
  1676. the documented boot protocol using a device tree.
  1677. Beware that there is very little in terms of protection against
  1678. this option being confused by leftover garbage in memory that might
  1679. look like a DTB header after a reboot if no actual DTB is appended
  1680. to zImage. Do not leave this option active in a production kernel
  1681. if you don't intend to always append a DTB. Proper passing of the
  1682. location into r2 of a bootloader provided DTB is always preferable
  1683. to this option.
  1684. config ARM_ATAG_DTB_COMPAT
  1685. bool "Supplement the appended DTB with traditional ATAG information"
  1686. depends on ARM_APPENDED_DTB
  1687. help
  1688. Some old bootloaders can't be updated to a DTB capable one, yet
  1689. they provide ATAGs with memory configuration, the ramdisk address,
  1690. the kernel cmdline string, etc. Such information is dynamically
  1691. provided by the bootloader and can't always be stored in a static
  1692. DTB. To allow a device tree enabled kernel to be used with such
  1693. bootloaders, this option allows zImage to extract the information
  1694. from the ATAG list and store it at run time into the appended DTB.
  1695. config CMDLINE
  1696. string "Default kernel command string"
  1697. default ""
  1698. help
  1699. On some architectures (EBSA110 and CATS), there is currently no way
  1700. for the boot loader to pass arguments to the kernel. For these
  1701. architectures, you should supply some command-line options at build
  1702. time by entering them here. As a minimum, you should specify the
  1703. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1704. choice
  1705. prompt "Kernel command line type" if CMDLINE != ""
  1706. default CMDLINE_FROM_BOOTLOADER
  1707. config CMDLINE_FROM_BOOTLOADER
  1708. bool "Use bootloader kernel arguments if available"
  1709. help
  1710. Uses the command-line options passed by the boot loader. If
  1711. the boot loader doesn't provide any, the default kernel command
  1712. string provided in CMDLINE will be used.
  1713. config CMDLINE_EXTEND
  1714. bool "Extend bootloader kernel arguments"
  1715. help
  1716. The command-line arguments provided by the boot loader will be
  1717. appended to the default kernel command string.
  1718. config CMDLINE_FORCE
  1719. bool "Always use the default kernel command string"
  1720. help
  1721. Always use the default kernel command string, even if the boot
  1722. loader passes other arguments to the kernel.
  1723. This is useful if you cannot or don't want to change the
  1724. command-line options your boot loader passes to the kernel.
  1725. endchoice
  1726. config XIP_KERNEL
  1727. bool "Kernel Execute-In-Place from ROM"
  1728. depends on !ZBOOT_ROM && !ARM_LPAE
  1729. help
  1730. Execute-In-Place allows the kernel to run from non-volatile storage
  1731. directly addressable by the CPU, such as NOR flash. This saves RAM
  1732. space since the text section of the kernel is not loaded from flash
  1733. to RAM. Read-write sections, such as the data section and stack,
  1734. are still copied to RAM. The XIP kernel is not compressed since
  1735. it has to run directly from flash, so it will take more space to
  1736. store it. The flash address used to link the kernel object files,
  1737. and for storing it, is configuration dependent. Therefore, if you
  1738. say Y here, you must know the proper physical address where to
  1739. store the kernel image depending on your own flash memory usage.
  1740. Also note that the make target becomes "make xipImage" rather than
  1741. "make zImage" or "make Image". The final kernel binary to put in
  1742. ROM memory will be arch/arm/boot/xipImage.
  1743. If unsure, say N.
  1744. config XIP_PHYS_ADDR
  1745. hex "XIP Kernel Physical Location"
  1746. depends on XIP_KERNEL
  1747. default "0x00080000"
  1748. help
  1749. This is the physical address in your flash memory the kernel will
  1750. be linked for and stored to. This address is dependent on your
  1751. own flash usage.
  1752. config KEXEC
  1753. bool "Kexec system call (EXPERIMENTAL)"
  1754. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1755. help
  1756. kexec is a system call that implements the ability to shutdown your
  1757. current kernel, and to start another kernel. It is like a reboot
  1758. but it is independent of the system firmware. And like a reboot
  1759. you can start any kernel with it, not just Linux.
  1760. It is an ongoing process to be certain the hardware in a machine
  1761. is properly shutdown, so do not be surprised if this code does not
  1762. initially work for you. It may help to enable device hotplugging
  1763. support.
  1764. config ATAGS_PROC
  1765. bool "Export atags in procfs"
  1766. depends on KEXEC
  1767. default y
  1768. help
  1769. Should the atags used to boot the kernel be exported in an "atags"
  1770. file in procfs. Useful with kexec.
  1771. config CRASH_DUMP
  1772. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1773. depends on EXPERIMENTAL
  1774. help
  1775. Generate crash dump after being started by kexec. This should
  1776. be normally only set in special crash dump kernels which are
  1777. loaded in the main kernel with kexec-tools into a specially
  1778. reserved region and then later executed after a crash by
  1779. kdump/kexec. The crash dump kernel must be compiled to a
  1780. memory address not used by the main kernel
  1781. For more details see Documentation/kdump/kdump.txt
  1782. config AUTO_ZRELADDR
  1783. bool "Auto calculation of the decompressed kernel image address"
  1784. depends on !ZBOOT_ROM && !ARCH_U300
  1785. help
  1786. ZRELADDR is the physical address where the decompressed kernel
  1787. image will be placed. If AUTO_ZRELADDR is selected, the address
  1788. will be determined at run-time by masking the current IP with
  1789. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1790. from start of memory.
  1791. endmenu
  1792. menu "CPU Power Management"
  1793. if ARCH_HAS_CPUFREQ
  1794. source "drivers/cpufreq/Kconfig"
  1795. config CPU_FREQ_IMX
  1796. tristate "CPUfreq driver for i.MX CPUs"
  1797. depends on ARCH_MXC && CPU_FREQ
  1798. help
  1799. This enables the CPUfreq driver for i.MX CPUs.
  1800. config CPU_FREQ_SA1100
  1801. bool
  1802. config CPU_FREQ_SA1110
  1803. bool
  1804. config CPU_FREQ_INTEGRATOR
  1805. tristate "CPUfreq driver for ARM Integrator CPUs"
  1806. depends on ARCH_INTEGRATOR && CPU_FREQ
  1807. default y
  1808. help
  1809. This enables the CPUfreq driver for ARM Integrator CPUs.
  1810. For details, take a look at <file:Documentation/cpu-freq>.
  1811. If in doubt, say Y.
  1812. config CPU_FREQ_PXA
  1813. bool
  1814. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1815. default y
  1816. select CPU_FREQ_TABLE
  1817. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1818. config CPU_FREQ_S3C
  1819. bool
  1820. help
  1821. Internal configuration node for common cpufreq on Samsung SoC
  1822. config CPU_FREQ_S3C24XX
  1823. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1824. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1825. select CPU_FREQ_S3C
  1826. help
  1827. This enables the CPUfreq driver for the Samsung S3C24XX family
  1828. of CPUs.
  1829. For details, take a look at <file:Documentation/cpu-freq>.
  1830. If in doubt, say N.
  1831. config CPU_FREQ_S3C24XX_PLL
  1832. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1833. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1834. help
  1835. Compile in support for changing the PLL frequency from the
  1836. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1837. after a frequency change, so by default it is not enabled.
  1838. This also means that the PLL tables for the selected CPU(s) will
  1839. be built which may increase the size of the kernel image.
  1840. config CPU_FREQ_S3C24XX_DEBUG
  1841. bool "Debug CPUfreq Samsung driver core"
  1842. depends on CPU_FREQ_S3C24XX
  1843. help
  1844. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1845. config CPU_FREQ_S3C24XX_IODEBUG
  1846. bool "Debug CPUfreq Samsung driver IO timing"
  1847. depends on CPU_FREQ_S3C24XX
  1848. help
  1849. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1850. config CPU_FREQ_S3C24XX_DEBUGFS
  1851. bool "Export debugfs for CPUFreq"
  1852. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1853. help
  1854. Export status information via debugfs.
  1855. endif
  1856. source "drivers/cpuidle/Kconfig"
  1857. endmenu
  1858. menu "Floating point emulation"
  1859. comment "At least one emulation must be selected"
  1860. config FPE_NWFPE
  1861. bool "NWFPE math emulation"
  1862. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1863. ---help---
  1864. Say Y to include the NWFPE floating point emulator in the kernel.
  1865. This is necessary to run most binaries. Linux does not currently
  1866. support floating point hardware so you need to say Y here even if
  1867. your machine has an FPA or floating point co-processor podule.
  1868. You may say N here if you are going to load the Acorn FPEmulator
  1869. early in the bootup.
  1870. config FPE_NWFPE_XP
  1871. bool "Support extended precision"
  1872. depends on FPE_NWFPE
  1873. help
  1874. Say Y to include 80-bit support in the kernel floating-point
  1875. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1876. Note that gcc does not generate 80-bit operations by default,
  1877. so in most cases this option only enlarges the size of the
  1878. floating point emulator without any good reason.
  1879. You almost surely want to say N here.
  1880. config FPE_FASTFPE
  1881. bool "FastFPE math emulation (EXPERIMENTAL)"
  1882. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1883. ---help---
  1884. Say Y here to include the FAST floating point emulator in the kernel.
  1885. This is an experimental much faster emulator which now also has full
  1886. precision for the mantissa. It does not support any exceptions.
  1887. It is very simple, and approximately 3-6 times faster than NWFPE.
  1888. It should be sufficient for most programs. It may be not suitable
  1889. for scientific calculations, but you have to check this for yourself.
  1890. If you do not feel you need a faster FP emulation you should better
  1891. choose NWFPE.
  1892. config VFP
  1893. bool "VFP-format floating point maths"
  1894. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1895. help
  1896. Say Y to include VFP support code in the kernel. This is needed
  1897. if your hardware includes a VFP unit.
  1898. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1899. release notes and additional status information.
  1900. Say N if your target does not have VFP hardware.
  1901. config VFPv3
  1902. bool
  1903. depends on VFP
  1904. default y if CPU_V7
  1905. config NEON
  1906. bool "Advanced SIMD (NEON) Extension support"
  1907. depends on VFPv3 && CPU_V7
  1908. help
  1909. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1910. Extension.
  1911. endmenu
  1912. menu "Userspace binary formats"
  1913. source "fs/Kconfig.binfmt"
  1914. config ARTHUR
  1915. tristate "RISC OS personality"
  1916. depends on !AEABI
  1917. help
  1918. Say Y here to include the kernel code necessary if you want to run
  1919. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1920. experimental; if this sounds frightening, say N and sleep in peace.
  1921. You can also say M here to compile this support as a module (which
  1922. will be called arthur).
  1923. endmenu
  1924. menu "Power management options"
  1925. source "kernel/power/Kconfig"
  1926. config ARCH_SUSPEND_POSSIBLE
  1927. depends on !ARCH_S5PC100
  1928. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1929. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1930. def_bool y
  1931. config ARM_CPU_SUSPEND
  1932. def_bool PM_SLEEP
  1933. endmenu
  1934. source "net/Kconfig"
  1935. source "drivers/Kconfig"
  1936. source "fs/Kconfig"
  1937. source "arch/arm/Kconfig.debug"
  1938. source "security/Kconfig"
  1939. source "crypto/Kconfig"
  1940. source "lib/Kconfig"