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