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