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_KGDB
  13. select HAVE_KPROBES if !XIP_KERNEL
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  20. select HAVE_GENERIC_DMA_COHERENT
  21. select HAVE_KERNEL_GZIP
  22. select HAVE_KERNEL_LZO
  23. select HAVE_KERNEL_LZMA
  24. select HAVE_KERNEL_XZ
  25. select HAVE_IRQ_WORK
  26. select HAVE_PERF_EVENTS
  27. select PERF_USE_VMALLOC
  28. select HAVE_REGS_AND_STACK_ACCESS_API
  29. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  30. select HAVE_C_RECORDMCOUNT
  31. select HAVE_GENERIC_HARDIRQS
  32. select HAVE_SPARSE_IRQ
  33. select GENERIC_IRQ_SHOW
  34. select CPU_PM if (SUSPEND || CPU_IDLE)
  35. select GENERIC_PCI_IOMAP
  36. help
  37. The ARM series is a line of low-power-consumption RISC chip designs
  38. licensed by ARM Ltd and targeted at embedded applications and
  39. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  40. manufactured, but legacy ARM-based PC hardware remains popular in
  41. Europe. There is an ARM Linux project with a web page at
  42. <http://www.arm.linux.org.uk/>.
  43. config ARM_HAS_SG_CHAIN
  44. bool
  45. config HAVE_PWM
  46. bool
  47. config MIGHT_HAVE_PCI
  48. bool
  49. config SYS_SUPPORTS_APM_EMULATION
  50. bool
  51. config HAVE_SCHED_CLOCK
  52. bool
  53. config GENERIC_GPIO
  54. bool
  55. config ARCH_USES_GETTIMEOFFSET
  56. bool
  57. default n
  58. config GENERIC_CLOCKEVENTS
  59. bool
  60. config GENERIC_CLOCKEVENTS_BROADCAST
  61. bool
  62. depends on GENERIC_CLOCKEVENTS
  63. default y if SMP
  64. config KTIME_SCALAR
  65. bool
  66. default y
  67. config HAVE_TCM
  68. bool
  69. select GENERIC_ALLOCATOR
  70. config HAVE_PROC_CPU
  71. bool
  72. config NO_IOPORT
  73. bool
  74. config EISA
  75. bool
  76. ---help---
  77. The Extended Industry Standard Architecture (EISA) bus was
  78. developed as an open alternative to the IBM MicroChannel bus.
  79. The EISA bus provided some of the features of the IBM MicroChannel
  80. bus while maintaining backward compatibility with cards made for
  81. the older ISA bus. The EISA bus saw limited use between 1988 and
  82. 1995 when it was made obsolete by the PCI bus.
  83. Say Y here if you are building a kernel for an EISA-based machine.
  84. Otherwise, say N.
  85. config SBUS
  86. bool
  87. config MCA
  88. bool
  89. help
  90. MicroChannel Architecture is found in some IBM PS/2 machines and
  91. laptops. It is a bus system similar to PCI or ISA. See
  92. <file:Documentation/mca.txt> (and especially the web page given
  93. there) before attempting to build an MCA bus kernel.
  94. config STACKTRACE_SUPPORT
  95. bool
  96. default y
  97. config HAVE_LATENCYTOP_SUPPORT
  98. bool
  99. depends on !SMP
  100. default y
  101. config LOCKDEP_SUPPORT
  102. bool
  103. default y
  104. config TRACE_IRQFLAGS_SUPPORT
  105. bool
  106. default y
  107. config HARDIRQS_SW_RESEND
  108. bool
  109. default y
  110. config GENERIC_IRQ_PROBE
  111. bool
  112. default y
  113. config GENERIC_LOCKBREAK
  114. bool
  115. default y
  116. depends on SMP && PREEMPT
  117. config RWSEM_GENERIC_SPINLOCK
  118. bool
  119. default y
  120. config RWSEM_XCHGADD_ALGORITHM
  121. bool
  122. config ARCH_HAS_ILOG2_U32
  123. bool
  124. config ARCH_HAS_ILOG2_U64
  125. bool
  126. config ARCH_HAS_CPUFREQ
  127. bool
  128. help
  129. Internal node to signify that the ARCH has CPUFREQ support
  130. and that the relevant menu configurations are displayed for
  131. it.
  132. config ARCH_HAS_CPU_IDLE_WAIT
  133. def_bool y
  134. config GENERIC_HWEIGHT
  135. bool
  136. default y
  137. config GENERIC_CALIBRATE_DELAY
  138. bool
  139. default y
  140. config ARCH_MAY_HAVE_PC_FDC
  141. bool
  142. config ZONE_DMA
  143. bool
  144. config NEED_DMA_MAP_STATE
  145. def_bool y
  146. config GENERIC_ISA_DMA
  147. bool
  148. config FIQ
  149. bool
  150. config ARCH_MTD_XIP
  151. bool
  152. config VECTORS_BASE
  153. hex
  154. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  155. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  156. default 0x00000000
  157. help
  158. The base address of exception vectors.
  159. config ARM_PATCH_PHYS_VIRT
  160. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  161. default y
  162. depends on !XIP_KERNEL && MMU
  163. depends on !ARCH_REALVIEW || !SPARSEMEM
  164. help
  165. Patch phys-to-virt and virt-to-phys translation functions at
  166. boot and module load time according to the position of the
  167. kernel in system memory.
  168. This can only be used with non-XIP MMU kernels where the base
  169. of physical memory is at a 16MB boundary.
  170. Only disable this option if you know that you do not require
  171. this feature (eg, building a kernel for a single machine) and
  172. you need to shrink the kernel to the minimal size.
  173. config NEED_MACH_MEMORY_H
  174. bool
  175. help
  176. Select this when mach/memory.h is required to provide special
  177. definitions for this platform. The need for mach/memory.h should
  178. be avoided when possible.
  179. config PHYS_OFFSET
  180. hex "Physical address of main memory" if MMU
  181. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  182. default DRAM_BASE if !MMU
  183. help
  184. Please provide the physical address corresponding to the
  185. location of main memory in your system.
  186. config GENERIC_BUG
  187. def_bool y
  188. depends on BUG
  189. source "init/Kconfig"
  190. source "kernel/Kconfig.freezer"
  191. menu "System Type"
  192. config MMU
  193. bool "MMU-based Paged Memory Management Support"
  194. default y
  195. help
  196. Select if you want MMU-based virtualised addressing space
  197. support by paged memory management. If unsure, say 'Y'.
  198. #
  199. # The "ARM system type" choice list is ordered alphabetically by option
  200. # text. Please add new entries in the option alphabetic order.
  201. #
  202. choice
  203. prompt "ARM system type"
  204. default ARCH_VERSATILE
  205. config ARCH_INTEGRATOR
  206. bool "ARM Ltd. Integrator family"
  207. select ARM_AMBA
  208. select ARCH_HAS_CPUFREQ
  209. select CLKDEV_LOOKUP
  210. select HAVE_MACH_CLKDEV
  211. select HAVE_TCM
  212. select ICST
  213. select GENERIC_CLOCKEVENTS
  214. select PLAT_VERSATILE
  215. select PLAT_VERSATILE_FPGA_IRQ
  216. select NEED_MACH_MEMORY_H
  217. help
  218. Support for ARM's Integrator platform.
  219. config ARCH_REALVIEW
  220. bool "ARM Ltd. RealView family"
  221. select ARM_AMBA
  222. select CLKDEV_LOOKUP
  223. select HAVE_MACH_CLKDEV
  224. select ICST
  225. select GENERIC_CLOCKEVENTS
  226. select ARCH_WANT_OPTIONAL_GPIOLIB
  227. select PLAT_VERSATILE
  228. select PLAT_VERSATILE_CLCD
  229. select ARM_TIMER_SP804
  230. select GPIO_PL061 if GPIOLIB
  231. select NEED_MACH_MEMORY_H
  232. help
  233. This enables support for ARM Ltd RealView boards.
  234. config ARCH_VERSATILE
  235. bool "ARM Ltd. Versatile family"
  236. select ARM_AMBA
  237. select ARM_VIC
  238. select CLKDEV_LOOKUP
  239. select HAVE_MACH_CLKDEV
  240. select ICST
  241. select GENERIC_CLOCKEVENTS
  242. select ARCH_WANT_OPTIONAL_GPIOLIB
  243. select PLAT_VERSATILE
  244. select PLAT_VERSATILE_CLCD
  245. select PLAT_VERSATILE_FPGA_IRQ
  246. select ARM_TIMER_SP804
  247. help
  248. This enables support for ARM Ltd Versatile board.
  249. config ARCH_VEXPRESS
  250. bool "ARM Ltd. Versatile Express family"
  251. select ARCH_WANT_OPTIONAL_GPIOLIB
  252. select ARM_AMBA
  253. select ARM_TIMER_SP804
  254. select CLKDEV_LOOKUP
  255. select HAVE_MACH_CLKDEV
  256. select GENERIC_CLOCKEVENTS
  257. select HAVE_CLK
  258. select HAVE_PATA_PLATFORM
  259. select ICST
  260. select NO_IOPORT
  261. select PLAT_VERSATILE
  262. select PLAT_VERSATILE_CLCD
  263. help
  264. This enables support for the ARM Ltd Versatile Express boards.
  265. config ARCH_AT91
  266. bool "Atmel AT91"
  267. select ARCH_REQUIRE_GPIOLIB
  268. select HAVE_CLK
  269. select CLKDEV_LOOKUP
  270. help
  271. This enables support for systems based on the Atmel AT91RM9200,
  272. AT91SAM9 and AT91CAP9 processors.
  273. config ARCH_BCMRING
  274. bool "Broadcom BCMRING"
  275. depends on MMU
  276. select CPU_V6
  277. select ARM_AMBA
  278. select ARM_TIMER_SP804
  279. select CLKDEV_LOOKUP
  280. select GENERIC_CLOCKEVENTS
  281. select ARCH_WANT_OPTIONAL_GPIOLIB
  282. help
  283. Support for Broadcom's BCMRing platform.
  284. config ARCH_HIGHBANK
  285. bool "Calxeda Highbank-based"
  286. select ARCH_WANT_OPTIONAL_GPIOLIB
  287. select ARM_AMBA
  288. select ARM_GIC
  289. select ARM_TIMER_SP804
  290. select CACHE_L2X0
  291. select CLKDEV_LOOKUP
  292. select CPU_V7
  293. select GENERIC_CLOCKEVENTS
  294. select HAVE_ARM_SCU
  295. select HAVE_SMP
  296. select USE_OF
  297. help
  298. Support for the Calxeda Highbank SoC based boards.
  299. config ARCH_CLPS711X
  300. bool "Cirrus Logic CLPS711x/EP721x-based"
  301. select CPU_ARM720T
  302. select ARCH_USES_GETTIMEOFFSET
  303. select NEED_MACH_MEMORY_H
  304. help
  305. Support for Cirrus Logic 711x/721x based boards.
  306. config ARCH_CNS3XXX
  307. bool "Cavium Networks CNS3XXX family"
  308. select CPU_V6K
  309. select GENERIC_CLOCKEVENTS
  310. select ARM_GIC
  311. select MIGHT_HAVE_CACHE_L2X0
  312. select MIGHT_HAVE_PCI
  313. select PCI_DOMAINS if PCI
  314. help
  315. Support for Cavium Networks CNS3XXX platform.
  316. config ARCH_GEMINI
  317. bool "Cortina Systems Gemini"
  318. select CPU_FA526
  319. select ARCH_REQUIRE_GPIOLIB
  320. select ARCH_USES_GETTIMEOFFSET
  321. help
  322. Support for the Cortina Systems Gemini family SoCs
  323. config ARCH_PRIMA2
  324. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  325. select CPU_V7
  326. select NO_IOPORT
  327. select GENERIC_CLOCKEVENTS
  328. select CLKDEV_LOOKUP
  329. select GENERIC_IRQ_CHIP
  330. select MIGHT_HAVE_CACHE_L2X0
  331. select USE_OF
  332. select ZONE_DMA
  333. help
  334. Support for CSR SiRFSoC ARM Cortex A9 Platform
  335. config ARCH_EBSA110
  336. bool "EBSA-110"
  337. select CPU_SA110
  338. select ISA
  339. select NO_IOPORT
  340. select ARCH_USES_GETTIMEOFFSET
  341. select NEED_MACH_MEMORY_H
  342. help
  343. This is an evaluation board for the StrongARM processor available
  344. from Digital. It has limited hardware on-board, including an
  345. Ethernet interface, two PCMCIA sockets, two serial ports and a
  346. parallel port.
  347. config ARCH_EP93XX
  348. bool "EP93xx-based"
  349. select CPU_ARM920T
  350. select ARM_AMBA
  351. select ARM_VIC
  352. select CLKDEV_LOOKUP
  353. select ARCH_REQUIRE_GPIOLIB
  354. select ARCH_HAS_HOLES_MEMORYMODEL
  355. select ARCH_USES_GETTIMEOFFSET
  356. select NEED_MACH_MEMORY_H
  357. help
  358. This enables support for the Cirrus EP93xx series of CPUs.
  359. config ARCH_FOOTBRIDGE
  360. bool "FootBridge"
  361. select CPU_SA110
  362. select FOOTBRIDGE
  363. select GENERIC_CLOCKEVENTS
  364. select HAVE_IDE
  365. select NEED_MACH_MEMORY_H
  366. help
  367. Support for systems based on the DC21285 companion chip
  368. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  369. config ARCH_MXC
  370. bool "Freescale MXC/iMX-based"
  371. select GENERIC_CLOCKEVENTS
  372. select ARCH_REQUIRE_GPIOLIB
  373. select CLKDEV_LOOKUP
  374. select CLKSRC_MMIO
  375. select GENERIC_IRQ_CHIP
  376. select HAVE_SCHED_CLOCK
  377. select MULTI_IRQ_HANDLER
  378. help
  379. Support for Freescale MXC/iMX-based family of processors
  380. config ARCH_MXS
  381. bool "Freescale MXS-based"
  382. select GENERIC_CLOCKEVENTS
  383. select ARCH_REQUIRE_GPIOLIB
  384. select CLKDEV_LOOKUP
  385. select CLKSRC_MMIO
  386. select HAVE_CLK_PREPARE
  387. help
  388. Support for Freescale MXS-based family of processors
  389. config ARCH_NETX
  390. bool "Hilscher NetX based"
  391. select CLKSRC_MMIO
  392. select CPU_ARM926T
  393. select ARM_VIC
  394. select GENERIC_CLOCKEVENTS
  395. help
  396. This enables support for systems based on the Hilscher NetX Soc
  397. config ARCH_H720X
  398. bool "Hynix HMS720x-based"
  399. select CPU_ARM720T
  400. select ISA_DMA_API
  401. select ARCH_USES_GETTIMEOFFSET
  402. help
  403. This enables support for systems based on the Hynix HMS720x
  404. config ARCH_IOP13XX
  405. bool "IOP13xx-based"
  406. depends on MMU
  407. select CPU_XSC3
  408. select PLAT_IOP
  409. select PCI
  410. select ARCH_SUPPORTS_MSI
  411. select VMSPLIT_1G
  412. select NEED_MACH_MEMORY_H
  413. help
  414. Support for Intel's IOP13XX (XScale) family of processors.
  415. config ARCH_IOP32X
  416. bool "IOP32x-based"
  417. depends on MMU
  418. select CPU_XSCALE
  419. select PLAT_IOP
  420. select PCI
  421. select ARCH_REQUIRE_GPIOLIB
  422. help
  423. Support for Intel's 80219 and IOP32X (XScale) family of
  424. processors.
  425. config ARCH_IOP33X
  426. bool "IOP33x-based"
  427. depends on MMU
  428. select CPU_XSCALE
  429. select PLAT_IOP
  430. select PCI
  431. select ARCH_REQUIRE_GPIOLIB
  432. help
  433. Support for Intel's IOP33X (XScale) family of processors.
  434. config ARCH_IXP23XX
  435. bool "IXP23XX-based"
  436. depends on MMU
  437. select CPU_XSC3
  438. select PCI
  439. select ARCH_USES_GETTIMEOFFSET
  440. select NEED_MACH_MEMORY_H
  441. help
  442. Support for Intel's IXP23xx (XScale) family of processors.
  443. config ARCH_IXP2000
  444. bool "IXP2400/2800-based"
  445. depends on MMU
  446. select CPU_XSCALE
  447. select PCI
  448. select ARCH_USES_GETTIMEOFFSET
  449. select NEED_MACH_MEMORY_H
  450. help
  451. Support for Intel's IXP2400/2800 (XScale) family of processors.
  452. config ARCH_IXP4XX
  453. bool "IXP4xx-based"
  454. depends on MMU
  455. select CLKSRC_MMIO
  456. select CPU_XSCALE
  457. select GENERIC_GPIO
  458. select GENERIC_CLOCKEVENTS
  459. select HAVE_SCHED_CLOCK
  460. select MIGHT_HAVE_PCI
  461. select DMABOUNCE if PCI
  462. help
  463. Support for Intel's IXP4XX (XScale) family of processors.
  464. config ARCH_DOVE
  465. bool "Marvell Dove"
  466. select CPU_V7
  467. select PCI
  468. select ARCH_REQUIRE_GPIOLIB
  469. select GENERIC_CLOCKEVENTS
  470. select PLAT_ORION
  471. help
  472. Support for the Marvell Dove SoC 88AP510
  473. config ARCH_KIRKWOOD
  474. bool "Marvell Kirkwood"
  475. select CPU_FEROCEON
  476. select PCI
  477. select ARCH_REQUIRE_GPIOLIB
  478. select GENERIC_CLOCKEVENTS
  479. select PLAT_ORION
  480. help
  481. Support for the following Marvell Kirkwood series SoCs:
  482. 88F6180, 88F6192 and 88F6281.
  483. config ARCH_LPC32XX
  484. bool "NXP LPC32XX"
  485. select CLKSRC_MMIO
  486. select CPU_ARM926T
  487. select ARCH_REQUIRE_GPIOLIB
  488. select HAVE_IDE
  489. select ARM_AMBA
  490. select USB_ARCH_HAS_OHCI
  491. select CLKDEV_LOOKUP
  492. select GENERIC_CLOCKEVENTS
  493. help
  494. Support for the NXP LPC32XX family of processors
  495. config ARCH_MV78XX0
  496. bool "Marvell MV78xx0"
  497. select CPU_FEROCEON
  498. select PCI
  499. select ARCH_REQUIRE_GPIOLIB
  500. select GENERIC_CLOCKEVENTS
  501. select PLAT_ORION
  502. help
  503. Support for the following Marvell MV78xx0 series SoCs:
  504. MV781x0, MV782x0.
  505. config ARCH_ORION5X
  506. bool "Marvell Orion"
  507. depends on MMU
  508. select CPU_FEROCEON
  509. select PCI
  510. select ARCH_REQUIRE_GPIOLIB
  511. select GENERIC_CLOCKEVENTS
  512. select PLAT_ORION
  513. help
  514. Support for the following Marvell Orion 5x series SoCs:
  515. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  516. Orion-2 (5281), Orion-1-90 (6183).
  517. config ARCH_MMP
  518. bool "Marvell PXA168/910/MMP2"
  519. depends on MMU
  520. select ARCH_REQUIRE_GPIOLIB
  521. select CLKDEV_LOOKUP
  522. select GENERIC_CLOCKEVENTS
  523. select GPIO_PXA
  524. select HAVE_SCHED_CLOCK
  525. select TICK_ONESHOT
  526. select PLAT_PXA
  527. select SPARSE_IRQ
  528. select GENERIC_ALLOCATOR
  529. help
  530. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  531. config ARCH_KS8695
  532. bool "Micrel/Kendin KS8695"
  533. select CPU_ARM922T
  534. select ARCH_REQUIRE_GPIOLIB
  535. select ARCH_USES_GETTIMEOFFSET
  536. select NEED_MACH_MEMORY_H
  537. help
  538. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  539. System-on-Chip devices.
  540. config ARCH_W90X900
  541. bool "Nuvoton W90X900 CPU"
  542. select CPU_ARM926T
  543. select ARCH_REQUIRE_GPIOLIB
  544. select CLKDEV_LOOKUP
  545. select CLKSRC_MMIO
  546. select GENERIC_CLOCKEVENTS
  547. help
  548. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  549. At present, the w90x900 has been renamed nuc900, regarding
  550. the ARM series product line, you can login the following
  551. link address to know more.
  552. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  553. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  554. config ARCH_TEGRA
  555. bool "NVIDIA Tegra"
  556. select CLKDEV_LOOKUP
  557. select CLKSRC_MMIO
  558. select GENERIC_CLOCKEVENTS
  559. select GENERIC_GPIO
  560. select HAVE_CLK
  561. select HAVE_SCHED_CLOCK
  562. select HAVE_SMP
  563. select MIGHT_HAVE_CACHE_L2X0
  564. select ARCH_HAS_CPUFREQ
  565. help
  566. This enables support for NVIDIA Tegra based systems (Tegra APX,
  567. Tegra 6xx and Tegra 2 series).
  568. config ARCH_PICOXCELL
  569. bool "Picochip picoXcell"
  570. select ARCH_REQUIRE_GPIOLIB
  571. select ARM_PATCH_PHYS_VIRT
  572. select ARM_VIC
  573. select CPU_V6K
  574. select DW_APB_TIMER
  575. select GENERIC_CLOCKEVENTS
  576. select GENERIC_GPIO
  577. select HAVE_SCHED_CLOCK
  578. select HAVE_TCM
  579. select NO_IOPORT
  580. select SPARSE_IRQ
  581. select USE_OF
  582. help
  583. This enables support for systems based on the Picochip picoXcell
  584. family of Femtocell devices. The picoxcell support requires device tree
  585. for all boards.
  586. config ARCH_PNX4008
  587. bool "Philips Nexperia PNX4008 Mobile"
  588. select CPU_ARM926T
  589. select CLKDEV_LOOKUP
  590. select ARCH_USES_GETTIMEOFFSET
  591. help
  592. This enables support for Philips PNX4008 mobile platform.
  593. config ARCH_PXA
  594. bool "PXA2xx/PXA3xx-based"
  595. depends on MMU
  596. select ARCH_MTD_XIP
  597. select ARCH_HAS_CPUFREQ
  598. select CLKDEV_LOOKUP
  599. select CLKSRC_MMIO
  600. select ARCH_REQUIRE_GPIOLIB
  601. select GENERIC_CLOCKEVENTS
  602. select GPIO_PXA
  603. select HAVE_SCHED_CLOCK
  604. select TICK_ONESHOT
  605. select PLAT_PXA
  606. select SPARSE_IRQ
  607. select AUTO_ZRELADDR
  608. select MULTI_IRQ_HANDLER
  609. select ARM_CPU_SUSPEND if PM
  610. select HAVE_IDE
  611. help
  612. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  613. config ARCH_MSM
  614. bool "Qualcomm MSM"
  615. select HAVE_CLK
  616. select GENERIC_CLOCKEVENTS
  617. select ARCH_REQUIRE_GPIOLIB
  618. select CLKDEV_LOOKUP
  619. help
  620. Support for Qualcomm MSM/QSD based systems. This runs on the
  621. apps processor of the MSM/QSD and depends on a shared memory
  622. interface to the modem processor which runs the baseband
  623. stack and controls some vital subsystems
  624. (clock and power control, etc).
  625. config ARCH_SHMOBILE
  626. bool "Renesas SH-Mobile / R-Mobile"
  627. select HAVE_CLK
  628. select CLKDEV_LOOKUP
  629. select HAVE_MACH_CLKDEV
  630. select HAVE_SMP
  631. select GENERIC_CLOCKEVENTS
  632. select MIGHT_HAVE_CACHE_L2X0
  633. select NO_IOPORT
  634. select SPARSE_IRQ
  635. select MULTI_IRQ_HANDLER
  636. select PM_GENERIC_DOMAINS if PM
  637. select NEED_MACH_MEMORY_H
  638. help
  639. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  640. config ARCH_RPC
  641. bool "RiscPC"
  642. select ARCH_ACORN
  643. select FIQ
  644. select TIMER_ACORN
  645. select ARCH_MAY_HAVE_PC_FDC
  646. select HAVE_PATA_PLATFORM
  647. select ISA_DMA_API
  648. select NO_IOPORT
  649. select ARCH_SPARSEMEM_ENABLE
  650. select ARCH_USES_GETTIMEOFFSET
  651. select HAVE_IDE
  652. select NEED_MACH_MEMORY_H
  653. help
  654. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  655. CD-ROM interface, serial and parallel port, and the floppy drive.
  656. config ARCH_SA1100
  657. bool "SA1100-based"
  658. select CLKSRC_MMIO
  659. select CPU_SA1100
  660. select ISA
  661. select ARCH_SPARSEMEM_ENABLE
  662. select ARCH_MTD_XIP
  663. select ARCH_HAS_CPUFREQ
  664. select CPU_FREQ
  665. select GENERIC_CLOCKEVENTS
  666. select CLKDEV_LOOKUP
  667. select HAVE_SCHED_CLOCK
  668. select TICK_ONESHOT
  669. select ARCH_REQUIRE_GPIOLIB
  670. select HAVE_IDE
  671. select NEED_MACH_MEMORY_H
  672. help
  673. Support for StrongARM 11x0 based boards.
  674. config ARCH_S3C2410
  675. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  676. select GENERIC_GPIO
  677. select ARCH_HAS_CPUFREQ
  678. select HAVE_CLK
  679. select CLKDEV_LOOKUP
  680. select ARCH_USES_GETTIMEOFFSET
  681. select HAVE_S3C2410_I2C if I2C
  682. help
  683. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  684. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  685. the Samsung SMDK2410 development board (and derivatives).
  686. Note, the S3C2416 and the S3C2450 are so close that they even share
  687. the same SoC ID code. This means that there is no separate machine
  688. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  689. config ARCH_S3C64XX
  690. bool "Samsung S3C64XX"
  691. select PLAT_SAMSUNG
  692. select CPU_V6
  693. select ARM_VIC
  694. select HAVE_CLK
  695. select HAVE_TCM
  696. select CLKDEV_LOOKUP
  697. select NO_IOPORT
  698. select ARCH_USES_GETTIMEOFFSET
  699. select ARCH_HAS_CPUFREQ
  700. select ARCH_REQUIRE_GPIOLIB
  701. select SAMSUNG_CLKSRC
  702. select SAMSUNG_IRQ_VIC_TIMER
  703. select S3C_GPIO_TRACK
  704. select S3C_DEV_NAND
  705. select USB_ARCH_HAS_OHCI
  706. select SAMSUNG_GPIOLIB_4BIT
  707. select HAVE_S3C2410_I2C if I2C
  708. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  709. help
  710. Samsung S3C64XX series based systems
  711. config ARCH_S5P64X0
  712. bool "Samsung S5P6440 S5P6450"
  713. select CPU_V6
  714. select GENERIC_GPIO
  715. select HAVE_CLK
  716. select CLKDEV_LOOKUP
  717. select CLKSRC_MMIO
  718. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  719. select GENERIC_CLOCKEVENTS
  720. select HAVE_SCHED_CLOCK
  721. select HAVE_S3C2410_I2C if I2C
  722. select HAVE_S3C_RTC if RTC_CLASS
  723. help
  724. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  725. SMDK6450.
  726. config ARCH_S5PC100
  727. bool "Samsung S5PC100"
  728. select GENERIC_GPIO
  729. select HAVE_CLK
  730. select CLKDEV_LOOKUP
  731. select CPU_V7
  732. select ARM_L1_CACHE_SHIFT_6
  733. select ARCH_USES_GETTIMEOFFSET
  734. select HAVE_S3C2410_I2C if I2C
  735. select HAVE_S3C_RTC if RTC_CLASS
  736. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  737. help
  738. Samsung S5PC100 series based systems
  739. config ARCH_S5PV210
  740. bool "Samsung S5PV210/S5PC110"
  741. select CPU_V7
  742. select ARCH_SPARSEMEM_ENABLE
  743. select ARCH_HAS_HOLES_MEMORYMODEL
  744. select GENERIC_GPIO
  745. select HAVE_CLK
  746. select CLKDEV_LOOKUP
  747. select CLKSRC_MMIO
  748. select ARM_L1_CACHE_SHIFT_6
  749. select ARCH_HAS_CPUFREQ
  750. select GENERIC_CLOCKEVENTS
  751. select HAVE_SCHED_CLOCK
  752. select HAVE_S3C2410_I2C if I2C
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  755. select NEED_MACH_MEMORY_H
  756. help
  757. Samsung S5PV210/S5PC110 series based systems
  758. config ARCH_EXYNOS
  759. bool "SAMSUNG EXYNOS"
  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 ARCH_HAS_CPUFREQ
  767. select GENERIC_CLOCKEVENTS
  768. select HAVE_S3C_RTC if RTC_CLASS
  769. select HAVE_S3C2410_I2C if I2C
  770. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  771. select NEED_MACH_MEMORY_H
  772. help
  773. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  774. config ARCH_SHARK
  775. bool "Shark"
  776. select CPU_SA110
  777. select ISA
  778. select ISA_DMA
  779. select ZONE_DMA
  780. select PCI
  781. select ARCH_USES_GETTIMEOFFSET
  782. select NEED_MACH_MEMORY_H
  783. help
  784. Support for the StrongARM based Digital DNARD machine, also known
  785. as "Shark" (<http://www.shark-linux.de/shark.html>).
  786. config ARCH_U300
  787. bool "ST-Ericsson U300 Series"
  788. depends on MMU
  789. select CLKSRC_MMIO
  790. select CPU_ARM926T
  791. select HAVE_SCHED_CLOCK
  792. select HAVE_TCM
  793. select ARM_AMBA
  794. select ARM_PATCH_PHYS_VIRT
  795. select ARM_VIC
  796. select GENERIC_CLOCKEVENTS
  797. select CLKDEV_LOOKUP
  798. select HAVE_MACH_CLKDEV
  799. select GENERIC_GPIO
  800. select ARCH_REQUIRE_GPIOLIB
  801. help
  802. Support for ST-Ericsson U300 series mobile platforms.
  803. config ARCH_U8500
  804. bool "ST-Ericsson U8500 Series"
  805. select CPU_V7
  806. select ARM_AMBA
  807. select GENERIC_CLOCKEVENTS
  808. select CLKDEV_LOOKUP
  809. select ARCH_REQUIRE_GPIOLIB
  810. select ARCH_HAS_CPUFREQ
  811. select HAVE_SMP
  812. select MIGHT_HAVE_CACHE_L2X0
  813. help
  814. Support for ST-Ericsson's Ux500 architecture
  815. config ARCH_NOMADIK
  816. bool "STMicroelectronics Nomadik"
  817. select ARM_AMBA
  818. select ARM_VIC
  819. select CPU_ARM926T
  820. select CLKDEV_LOOKUP
  821. select GENERIC_CLOCKEVENTS
  822. select MIGHT_HAVE_CACHE_L2X0
  823. select ARCH_REQUIRE_GPIOLIB
  824. help
  825. Support for the Nomadik platform by ST-Ericsson
  826. config ARCH_DAVINCI
  827. bool "TI DaVinci"
  828. select GENERIC_CLOCKEVENTS
  829. select ARCH_REQUIRE_GPIOLIB
  830. select ZONE_DMA
  831. select HAVE_IDE
  832. select CLKDEV_LOOKUP
  833. select GENERIC_ALLOCATOR
  834. select GENERIC_IRQ_CHIP
  835. select ARCH_HAS_HOLES_MEMORYMODEL
  836. help
  837. Support for TI's DaVinci platform.
  838. config ARCH_OMAP
  839. bool "TI OMAP"
  840. select HAVE_CLK
  841. select ARCH_REQUIRE_GPIOLIB
  842. select ARCH_HAS_CPUFREQ
  843. select CLKSRC_MMIO
  844. select GENERIC_CLOCKEVENTS
  845. select HAVE_SCHED_CLOCK
  846. select ARCH_HAS_HOLES_MEMORYMODEL
  847. help
  848. Support for TI's OMAP platform (OMAP1/2/3/4).
  849. config PLAT_SPEAR
  850. bool "ST SPEAr"
  851. select ARM_AMBA
  852. select ARCH_REQUIRE_GPIOLIB
  853. select CLKDEV_LOOKUP
  854. select CLKSRC_MMIO
  855. select GENERIC_CLOCKEVENTS
  856. select HAVE_CLK
  857. help
  858. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  859. config ARCH_VT8500
  860. bool "VIA/WonderMedia 85xx"
  861. select CPU_ARM926T
  862. select GENERIC_GPIO
  863. select ARCH_HAS_CPUFREQ
  864. select GENERIC_CLOCKEVENTS
  865. select ARCH_REQUIRE_GPIOLIB
  866. select HAVE_PWM
  867. help
  868. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  869. config ARCH_ZYNQ
  870. bool "Xilinx Zynq ARM Cortex A9 Platform"
  871. select CPU_V7
  872. select GENERIC_CLOCKEVENTS
  873. select CLKDEV_LOOKUP
  874. select ARM_GIC
  875. select ARM_AMBA
  876. select ICST
  877. select MIGHT_HAVE_CACHE_L2X0
  878. select USE_OF
  879. help
  880. Support for Xilinx Zynq ARM Cortex A9 Platform
  881. endchoice
  882. #
  883. # This is sorted alphabetically by mach-* pathname. However, plat-*
  884. # Kconfigs may be included either alphabetically (according to the
  885. # plat- suffix) or along side the corresponding mach-* source.
  886. #
  887. source "arch/arm/mach-at91/Kconfig"
  888. source "arch/arm/mach-bcmring/Kconfig"
  889. source "arch/arm/mach-clps711x/Kconfig"
  890. source "arch/arm/mach-cns3xxx/Kconfig"
  891. source "arch/arm/mach-davinci/Kconfig"
  892. source "arch/arm/mach-dove/Kconfig"
  893. source "arch/arm/mach-ep93xx/Kconfig"
  894. source "arch/arm/mach-footbridge/Kconfig"
  895. source "arch/arm/mach-gemini/Kconfig"
  896. source "arch/arm/mach-h720x/Kconfig"
  897. source "arch/arm/mach-integrator/Kconfig"
  898. source "arch/arm/mach-iop32x/Kconfig"
  899. source "arch/arm/mach-iop33x/Kconfig"
  900. source "arch/arm/mach-iop13xx/Kconfig"
  901. source "arch/arm/mach-ixp4xx/Kconfig"
  902. source "arch/arm/mach-ixp2000/Kconfig"
  903. source "arch/arm/mach-ixp23xx/Kconfig"
  904. source "arch/arm/mach-kirkwood/Kconfig"
  905. source "arch/arm/mach-ks8695/Kconfig"
  906. source "arch/arm/mach-lpc32xx/Kconfig"
  907. source "arch/arm/mach-msm/Kconfig"
  908. source "arch/arm/mach-mv78xx0/Kconfig"
  909. source "arch/arm/plat-mxc/Kconfig"
  910. source "arch/arm/mach-mxs/Kconfig"
  911. source "arch/arm/mach-netx/Kconfig"
  912. source "arch/arm/mach-nomadik/Kconfig"
  913. source "arch/arm/plat-nomadik/Kconfig"
  914. source "arch/arm/plat-omap/Kconfig"
  915. source "arch/arm/mach-omap1/Kconfig"
  916. source "arch/arm/mach-omap2/Kconfig"
  917. source "arch/arm/mach-orion5x/Kconfig"
  918. source "arch/arm/mach-pxa/Kconfig"
  919. source "arch/arm/plat-pxa/Kconfig"
  920. source "arch/arm/mach-mmp/Kconfig"
  921. source "arch/arm/mach-realview/Kconfig"
  922. source "arch/arm/mach-sa1100/Kconfig"
  923. source "arch/arm/plat-samsung/Kconfig"
  924. source "arch/arm/plat-s3c24xx/Kconfig"
  925. source "arch/arm/plat-s5p/Kconfig"
  926. source "arch/arm/plat-spear/Kconfig"
  927. if ARCH_S3C2410
  928. source "arch/arm/mach-s3c2410/Kconfig"
  929. source "arch/arm/mach-s3c2412/Kconfig"
  930. source "arch/arm/mach-s3c2416/Kconfig"
  931. source "arch/arm/mach-s3c2440/Kconfig"
  932. source "arch/arm/mach-s3c2443/Kconfig"
  933. endif
  934. if ARCH_S3C64XX
  935. source "arch/arm/mach-s3c64xx/Kconfig"
  936. endif
  937. source "arch/arm/mach-s5p64x0/Kconfig"
  938. source "arch/arm/mach-s5pc100/Kconfig"
  939. source "arch/arm/mach-s5pv210/Kconfig"
  940. source "arch/arm/mach-exynos/Kconfig"
  941. source "arch/arm/mach-shmobile/Kconfig"
  942. source "arch/arm/mach-tegra/Kconfig"
  943. source "arch/arm/mach-u300/Kconfig"
  944. source "arch/arm/mach-ux500/Kconfig"
  945. source "arch/arm/mach-versatile/Kconfig"
  946. source "arch/arm/mach-vexpress/Kconfig"
  947. source "arch/arm/plat-versatile/Kconfig"
  948. source "arch/arm/mach-vt8500/Kconfig"
  949. source "arch/arm/mach-w90x900/Kconfig"
  950. # Definitions to make life easier
  951. config ARCH_ACORN
  952. bool
  953. config PLAT_IOP
  954. bool
  955. select GENERIC_CLOCKEVENTS
  956. select HAVE_SCHED_CLOCK
  957. config PLAT_ORION
  958. bool
  959. select CLKSRC_MMIO
  960. select GENERIC_IRQ_CHIP
  961. select HAVE_SCHED_CLOCK
  962. config PLAT_PXA
  963. bool
  964. config PLAT_VERSATILE
  965. bool
  966. config ARM_TIMER_SP804
  967. bool
  968. select CLKSRC_MMIO
  969. source arch/arm/mm/Kconfig
  970. config ARM_NR_BANKS
  971. int
  972. default 16 if ARCH_EP93XX
  973. default 8
  974. config IWMMXT
  975. bool "Enable iWMMXt support"
  976. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  977. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  978. help
  979. Enable support for iWMMXt context switching at run time if
  980. running on a CPU that supports it.
  981. config XSCALE_PMU
  982. bool
  983. depends on CPU_XSCALE
  984. default y
  985. config CPU_HAS_PMU
  986. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  987. (!ARCH_OMAP3 || OMAP3_EMU)
  988. default y
  989. bool
  990. config MULTI_IRQ_HANDLER
  991. bool
  992. help
  993. Allow each machine to specify it's own IRQ handler at run time.
  994. if !MMU
  995. source "arch/arm/Kconfig-nommu"
  996. endif
  997. config ARM_ERRATA_411920
  998. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  999. depends on CPU_V6 || CPU_V6K
  1000. help
  1001. Invalidation of the Instruction Cache operation can
  1002. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1003. It does not affect the MPCore. This option enables the ARM Ltd.
  1004. recommended workaround.
  1005. config ARM_ERRATA_430973
  1006. bool "ARM errata: Stale prediction on replaced interworking branch"
  1007. depends on CPU_V7
  1008. help
  1009. This option enables the workaround for the 430973 Cortex-A8
  1010. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1011. interworking branch is replaced with another code sequence at the
  1012. same virtual address, whether due to self-modifying code or virtual
  1013. to physical address re-mapping, Cortex-A8 does not recover from the
  1014. stale interworking branch prediction. This results in Cortex-A8
  1015. executing the new code sequence in the incorrect ARM or Thumb state.
  1016. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1017. and also flushes the branch target cache at every context switch.
  1018. Note that setting specific bits in the ACTLR register may not be
  1019. available in non-secure mode.
  1020. config ARM_ERRATA_458693
  1021. bool "ARM errata: Processor deadlock when a false hazard is created"
  1022. depends on CPU_V7
  1023. help
  1024. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1025. erratum. For very specific sequences of memory operations, it is
  1026. possible for a hazard condition intended for a cache line to instead
  1027. be incorrectly associated with a different cache line. This false
  1028. hazard might then cause a processor deadlock. The workaround enables
  1029. the L1 caching of the NEON accesses and disables the PLD instruction
  1030. in the ACTLR register. Note that setting specific bits in the ACTLR
  1031. register may not be available in non-secure mode.
  1032. config ARM_ERRATA_460075
  1033. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1034. depends on CPU_V7
  1035. help
  1036. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1037. erratum. Any asynchronous access to the L2 cache may encounter a
  1038. situation in which recent store transactions to the L2 cache are lost
  1039. and overwritten with stale memory contents from external memory. The
  1040. workaround disables the write-allocate mode for the L2 cache via the
  1041. ACTLR register. Note that setting specific bits in the ACTLR register
  1042. may not be available in non-secure mode.
  1043. config ARM_ERRATA_742230
  1044. bool "ARM errata: DMB operation may be faulty"
  1045. depends on CPU_V7 && SMP
  1046. help
  1047. This option enables the workaround for the 742230 Cortex-A9
  1048. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1049. between two write operations may not ensure the correct visibility
  1050. ordering of the two writes. This workaround sets a specific bit in
  1051. the diagnostic register of the Cortex-A9 which causes the DMB
  1052. instruction to behave as a DSB, ensuring the correct behaviour of
  1053. the two writes.
  1054. config ARM_ERRATA_742231
  1055. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1056. depends on CPU_V7 && SMP
  1057. help
  1058. This option enables the workaround for the 742231 Cortex-A9
  1059. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1060. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1061. accessing some data located in the same cache line, may get corrupted
  1062. data due to bad handling of the address hazard when the line gets
  1063. replaced from one of the CPUs at the same time as another CPU is
  1064. accessing it. This workaround sets specific bits in the diagnostic
  1065. register of the Cortex-A9 which reduces the linefill issuing
  1066. capabilities of the processor.
  1067. config PL310_ERRATA_588369
  1068. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1069. depends on CACHE_L2X0
  1070. help
  1071. The PL310 L2 cache controller implements three types of Clean &
  1072. Invalidate maintenance operations: by Physical Address
  1073. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1074. They are architecturally defined to behave as the execution of a
  1075. clean operation followed immediately by an invalidate operation,
  1076. both performing to the same memory location. This functionality
  1077. is not correctly implemented in PL310 as clean lines are not
  1078. invalidated as a result of these operations.
  1079. config ARM_ERRATA_720789
  1080. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1081. depends on CPU_V7
  1082. help
  1083. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1084. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1085. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1086. As a consequence of this erratum, some TLB entries which should be
  1087. invalidated are not, resulting in an incoherency in the system page
  1088. tables. The workaround changes the TLB flushing routines to invalidate
  1089. entries regardless of the ASID.
  1090. config PL310_ERRATA_727915
  1091. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1092. depends on CACHE_L2X0
  1093. help
  1094. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1095. operation (offset 0x7FC). This operation runs in background so that
  1096. PL310 can handle normal accesses while it is in progress. Under very
  1097. rare circumstances, due to this erratum, write data can be lost when
  1098. PL310 treats a cacheable write transaction during a Clean &
  1099. Invalidate by Way operation.
  1100. config ARM_ERRATA_743622
  1101. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1102. depends on CPU_V7
  1103. help
  1104. This option enables the workaround for the 743622 Cortex-A9
  1105. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1106. optimisation in the Cortex-A9 Store Buffer may lead to data
  1107. corruption. This workaround sets a specific bit in the diagnostic
  1108. register of the Cortex-A9 which disables the Store Buffer
  1109. optimisation, preventing the defect from occurring. This has no
  1110. visible impact on the overall performance or power consumption of the
  1111. processor.
  1112. config ARM_ERRATA_751472
  1113. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1114. depends on CPU_V7
  1115. help
  1116. This option enables the workaround for the 751472 Cortex-A9 (prior
  1117. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1118. completion of a following broadcasted operation if the second
  1119. operation is received by a CPU before the ICIALLUIS has completed,
  1120. potentially leading to corrupted entries in the cache or TLB.
  1121. config PL310_ERRATA_753970
  1122. bool "PL310 errata: cache sync operation may be faulty"
  1123. depends on CACHE_PL310
  1124. help
  1125. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1126. Under some condition the effect of cache sync operation on
  1127. the store buffer still remains when the operation completes.
  1128. This means that the store buffer is always asked to drain and
  1129. this prevents it from merging any further writes. The workaround
  1130. is to replace the normal offset of cache sync operation (0x730)
  1131. by another offset targeting an unmapped PL310 register 0x740.
  1132. This has the same effect as the cache sync operation: store buffer
  1133. drain and waiting for all buffers empty.
  1134. config ARM_ERRATA_754322
  1135. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1136. depends on CPU_V7
  1137. help
  1138. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1139. r3p*) erratum. A speculative memory access may cause a page table walk
  1140. which starts prior to an ASID switch but completes afterwards. This
  1141. can populate the micro-TLB with a stale entry which may be hit with
  1142. the new ASID. This workaround places two dsb instructions in the mm
  1143. switching code so that no page table walks can cross the ASID switch.
  1144. config ARM_ERRATA_754327
  1145. bool "ARM errata: no automatic Store Buffer drain"
  1146. depends on CPU_V7 && SMP
  1147. help
  1148. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1149. r2p0) erratum. The Store Buffer does not have any automatic draining
  1150. mechanism and therefore a livelock may occur if an external agent
  1151. continuously polls a memory location waiting to observe an update.
  1152. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1153. written polling loops from denying visibility of updates to memory.
  1154. config ARM_ERRATA_364296
  1155. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1156. depends on CPU_V6 && !SMP
  1157. help
  1158. This options enables the workaround for the 364296 ARM1136
  1159. r0p2 erratum (possible cache data corruption with
  1160. hit-under-miss enabled). It sets the undocumented bit 31 in
  1161. the auxiliary control register and the FI bit in the control
  1162. register, thus disabling hit-under-miss without putting the
  1163. processor into full low interrupt latency mode. ARM11MPCore
  1164. is not affected.
  1165. config ARM_ERRATA_764369
  1166. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1167. depends on CPU_V7 && SMP
  1168. help
  1169. This option enables the workaround for erratum 764369
  1170. affecting Cortex-A9 MPCore with two or more processors (all
  1171. current revisions). Under certain timing circumstances, a data
  1172. cache line maintenance operation by MVA targeting an Inner
  1173. Shareable memory region may fail to proceed up to either the
  1174. Point of Coherency or to the Point of Unification of the
  1175. system. This workaround adds a DSB instruction before the
  1176. relevant cache maintenance functions and sets a specific bit
  1177. in the diagnostic control register of the SCU.
  1178. config PL310_ERRATA_769419
  1179. bool "PL310 errata: no automatic Store Buffer drain"
  1180. depends on CACHE_L2X0
  1181. help
  1182. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1183. not automatically drain. This can cause normal, non-cacheable
  1184. writes to be retained when the memory system is idle, leading
  1185. to suboptimal I/O performance for drivers using coherent DMA.
  1186. This option adds a write barrier to the cpu_idle loop so that,
  1187. on systems with an outer cache, the store buffer is drained
  1188. explicitly.
  1189. endmenu
  1190. source "arch/arm/common/Kconfig"
  1191. menu "Bus support"
  1192. config ARM_AMBA
  1193. bool
  1194. config ISA
  1195. bool
  1196. help
  1197. Find out whether you have ISA slots on your motherboard. ISA is the
  1198. name of a bus system, i.e. the way the CPU talks to the other stuff
  1199. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1200. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1201. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1202. # Select ISA DMA controller support
  1203. config ISA_DMA
  1204. bool
  1205. select ISA_DMA_API
  1206. # Select ISA DMA interface
  1207. config ISA_DMA_API
  1208. bool
  1209. config PCI
  1210. bool "PCI support" if MIGHT_HAVE_PCI
  1211. help
  1212. Find out whether you have a PCI motherboard. PCI is the name of a
  1213. bus system, i.e. the way the CPU talks to the other stuff inside
  1214. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1215. VESA. If you have PCI, say Y, otherwise N.
  1216. config PCI_DOMAINS
  1217. bool
  1218. depends on PCI
  1219. config PCI_NANOENGINE
  1220. bool "BSE nanoEngine PCI support"
  1221. depends on SA1100_NANOENGINE
  1222. help
  1223. Enable PCI on the BSE nanoEngine board.
  1224. config PCI_SYSCALL
  1225. def_bool PCI
  1226. # Select the host bridge type
  1227. config PCI_HOST_VIA82C505
  1228. bool
  1229. depends on PCI && ARCH_SHARK
  1230. default y
  1231. config PCI_HOST_ITE8152
  1232. bool
  1233. depends on PCI && MACH_ARMCORE
  1234. default y
  1235. select DMABOUNCE
  1236. source "drivers/pci/Kconfig"
  1237. source "drivers/pcmcia/Kconfig"
  1238. endmenu
  1239. menu "Kernel Features"
  1240. source "kernel/time/Kconfig"
  1241. config HAVE_SMP
  1242. bool
  1243. help
  1244. This option should be selected by machines which have an SMP-
  1245. capable CPU.
  1246. The only effect of this option is to make the SMP-related
  1247. options available to the user for configuration.
  1248. config SMP
  1249. bool "Symmetric Multi-Processing"
  1250. depends on CPU_V6K || CPU_V7
  1251. depends on GENERIC_CLOCKEVENTS
  1252. depends on HAVE_SMP
  1253. depends on MMU
  1254. select USE_GENERIC_SMP_HELPERS
  1255. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1256. help
  1257. This enables support for systems with more than one CPU. If you have
  1258. a system with only one CPU, like most personal computers, say N. If
  1259. you have a system with more than one CPU, say Y.
  1260. If you say N here, the kernel will run on single and multiprocessor
  1261. machines, but will use only one CPU of a multiprocessor machine. If
  1262. you say Y here, the kernel will run on many, but not all, single
  1263. processor machines. On a single processor machine, the kernel will
  1264. run faster if you say N here.
  1265. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1266. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1267. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1268. If you don't know what to do here, say N.
  1269. config SMP_ON_UP
  1270. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1271. depends on EXPERIMENTAL
  1272. depends on SMP && !XIP_KERNEL
  1273. default y
  1274. help
  1275. SMP kernels contain instructions which fail on non-SMP processors.
  1276. Enabling this option allows the kernel to modify itself to make
  1277. these instructions safe. Disabling it allows about 1K of space
  1278. savings.
  1279. If you don't know what to do here, say Y.
  1280. config ARM_CPU_TOPOLOGY
  1281. bool "Support cpu topology definition"
  1282. depends on SMP && CPU_V7
  1283. default y
  1284. help
  1285. Support ARM cpu topology definition. The MPIDR register defines
  1286. affinity between processors which is then used to describe the cpu
  1287. topology of an ARM System.
  1288. config SCHED_MC
  1289. bool "Multi-core scheduler support"
  1290. depends on ARM_CPU_TOPOLOGY
  1291. help
  1292. Multi-core scheduler support improves the CPU scheduler's decision
  1293. making when dealing with multi-core CPU chips at a cost of slightly
  1294. increased overhead in some places. If unsure say N here.
  1295. config SCHED_SMT
  1296. bool "SMT scheduler support"
  1297. depends on ARM_CPU_TOPOLOGY
  1298. help
  1299. Improves the CPU scheduler's decision making when dealing with
  1300. MultiThreading at a cost of slightly increased overhead in some
  1301. places. If unsure say N here.
  1302. config HAVE_ARM_SCU
  1303. bool
  1304. help
  1305. This option enables support for the ARM system coherency unit
  1306. config HAVE_ARM_TWD
  1307. bool
  1308. depends on SMP
  1309. select TICK_ONESHOT
  1310. help
  1311. This options enables support for the ARM timer and watchdog unit
  1312. choice
  1313. prompt "Memory split"
  1314. default VMSPLIT_3G
  1315. help
  1316. Select the desired split between kernel and user memory.
  1317. If you are not absolutely sure what you are doing, leave this
  1318. option alone!
  1319. config VMSPLIT_3G
  1320. bool "3G/1G user/kernel split"
  1321. config VMSPLIT_2G
  1322. bool "2G/2G user/kernel split"
  1323. config VMSPLIT_1G
  1324. bool "1G/3G user/kernel split"
  1325. endchoice
  1326. config PAGE_OFFSET
  1327. hex
  1328. default 0x40000000 if VMSPLIT_1G
  1329. default 0x80000000 if VMSPLIT_2G
  1330. default 0xC0000000
  1331. config NR_CPUS
  1332. int "Maximum number of CPUs (2-32)"
  1333. range 2 32
  1334. depends on SMP
  1335. default "4"
  1336. config HOTPLUG_CPU
  1337. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1338. depends on SMP && HOTPLUG && EXPERIMENTAL
  1339. help
  1340. Say Y here to experiment with turning CPUs off and on. CPUs
  1341. can be controlled through /sys/devices/system/cpu.
  1342. config LOCAL_TIMERS
  1343. bool "Use local timer interrupts"
  1344. depends on SMP
  1345. default y
  1346. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1347. help
  1348. Enable support for local timers on SMP platforms, rather then the
  1349. legacy IPI broadcast method. Local timers allows the system
  1350. accounting to be spread across the timer interval, preventing a
  1351. "thundering herd" at every timer tick.
  1352. config ARCH_NR_GPIO
  1353. int
  1354. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1355. default 350 if ARCH_U8500
  1356. default 0
  1357. help
  1358. Maximum number of GPIOs in the system.
  1359. If unsure, leave the default value.
  1360. source kernel/Kconfig.preempt
  1361. config HZ
  1362. int
  1363. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1364. ARCH_S5PV210 || ARCH_EXYNOS4
  1365. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1366. default AT91_TIMER_HZ if ARCH_AT91
  1367. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1368. default 100
  1369. config THUMB2_KERNEL
  1370. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1371. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1372. select AEABI
  1373. select ARM_ASM_UNIFIED
  1374. select ARM_UNWIND
  1375. help
  1376. By enabling this option, the kernel will be compiled in
  1377. Thumb-2 mode. A compiler/assembler that understand the unified
  1378. ARM-Thumb syntax is needed.
  1379. If unsure, say N.
  1380. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1381. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1382. depends on THUMB2_KERNEL && MODULES
  1383. default y
  1384. help
  1385. Various binutils versions can resolve Thumb-2 branches to
  1386. locally-defined, preemptible global symbols as short-range "b.n"
  1387. branch instructions.
  1388. This is a problem, because there's no guarantee the final
  1389. destination of the symbol, or any candidate locations for a
  1390. trampoline, are within range of the branch. For this reason, the
  1391. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1392. relocation in modules at all, and it makes little sense to add
  1393. support.
  1394. The symptom is that the kernel fails with an "unsupported
  1395. relocation" error when loading some modules.
  1396. Until fixed tools are available, passing
  1397. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1398. code which hits this problem, at the cost of a bit of extra runtime
  1399. stack usage in some cases.
  1400. The problem is described in more detail at:
  1401. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1402. Only Thumb-2 kernels are affected.
  1403. Unless you are sure your tools don't have this problem, say Y.
  1404. config ARM_ASM_UNIFIED
  1405. bool
  1406. config AEABI
  1407. bool "Use the ARM EABI to compile the kernel"
  1408. help
  1409. This option allows for the kernel to be compiled using the latest
  1410. ARM ABI (aka EABI). This is only useful if you are using a user
  1411. space environment that is also compiled with EABI.
  1412. Since there are major incompatibilities between the legacy ABI and
  1413. EABI, especially with regard to structure member alignment, this
  1414. option also changes the kernel syscall calling convention to
  1415. disambiguate both ABIs and allow for backward compatibility support
  1416. (selected with CONFIG_OABI_COMPAT).
  1417. To use this you need GCC version 4.0.0 or later.
  1418. config OABI_COMPAT
  1419. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1420. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1421. default y
  1422. help
  1423. This option preserves the old syscall interface along with the
  1424. new (ARM EABI) one. It also provides a compatibility layer to
  1425. intercept syscalls that have structure arguments which layout
  1426. in memory differs between the legacy ABI and the new ARM EABI
  1427. (only for non "thumb" binaries). This option adds a tiny
  1428. overhead to all syscalls and produces a slightly larger kernel.
  1429. If you know you'll be using only pure EABI user space then you
  1430. can say N here. If this option is not selected and you attempt
  1431. to execute a legacy ABI binary then the result will be
  1432. UNPREDICTABLE (in fact it can be predicted that it won't work
  1433. at all). If in doubt say Y.
  1434. config ARCH_HAS_HOLES_MEMORYMODEL
  1435. bool
  1436. config ARCH_SPARSEMEM_ENABLE
  1437. bool
  1438. config ARCH_SPARSEMEM_DEFAULT
  1439. def_bool ARCH_SPARSEMEM_ENABLE
  1440. config ARCH_SELECT_MEMORY_MODEL
  1441. def_bool ARCH_SPARSEMEM_ENABLE
  1442. config HAVE_ARCH_PFN_VALID
  1443. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1444. config HIGHMEM
  1445. bool "High Memory Support"
  1446. depends on MMU
  1447. help
  1448. The address space of ARM processors is only 4 Gigabytes large
  1449. and it has to accommodate user address space, kernel address
  1450. space as well as some memory mapped IO. That means that, if you
  1451. have a large amount of physical memory and/or IO, not all of the
  1452. memory can be "permanently mapped" by the kernel. The physical
  1453. memory that is not permanently mapped is called "high memory".
  1454. Depending on the selected kernel/user memory split, minimum
  1455. vmalloc space and actual amount of RAM, you may not need this
  1456. option which should result in a slightly faster kernel.
  1457. If unsure, say n.
  1458. config HIGHPTE
  1459. bool "Allocate 2nd-level pagetables from highmem"
  1460. depends on HIGHMEM
  1461. config HW_PERF_EVENTS
  1462. bool "Enable hardware performance counter support for perf events"
  1463. depends on PERF_EVENTS && CPU_HAS_PMU
  1464. default y
  1465. help
  1466. Enable hardware performance counter support for perf events. If
  1467. disabled, perf events will use software events only.
  1468. source "mm/Kconfig"
  1469. config FORCE_MAX_ZONEORDER
  1470. int "Maximum zone order" if ARCH_SHMOBILE
  1471. range 11 64 if ARCH_SHMOBILE
  1472. default "9" if SA1111
  1473. default "11"
  1474. help
  1475. The kernel memory allocator divides physically contiguous memory
  1476. blocks into "zones", where each zone is a power of two number of
  1477. pages. This option selects the largest power of two that the kernel
  1478. keeps in the memory allocator. If you need to allocate very large
  1479. blocks of physically contiguous memory, then you may need to
  1480. increase this value.
  1481. This config option is actually maximum order plus one. For example,
  1482. a value of 11 means that the largest free memory block is 2^10 pages.
  1483. config LEDS
  1484. bool "Timer and CPU usage LEDs"
  1485. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1486. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1487. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1488. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1489. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1490. ARCH_AT91 || ARCH_DAVINCI || \
  1491. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1492. help
  1493. If you say Y here, the LEDs on your machine will be used
  1494. to provide useful information about your current system status.
  1495. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1496. be able to select which LEDs are active using the options below. If
  1497. you are compiling a kernel for the EBSA-110 or the LART however, the
  1498. red LED will simply flash regularly to indicate that the system is
  1499. still functional. It is safe to say Y here if you have a CATS
  1500. system, but the driver will do nothing.
  1501. config LEDS_TIMER
  1502. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1503. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1504. || MACH_OMAP_PERSEUS2
  1505. depends on LEDS
  1506. depends on !GENERIC_CLOCKEVENTS
  1507. default y if ARCH_EBSA110
  1508. help
  1509. If you say Y here, one of the system LEDs (the green one on the
  1510. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1511. will flash regularly to indicate that the system is still
  1512. operational. This is mainly useful to kernel hackers who are
  1513. debugging unstable kernels.
  1514. The LART uses the same LED for both Timer LED and CPU usage LED
  1515. functions. You may choose to use both, but the Timer LED function
  1516. will overrule the CPU usage LED.
  1517. config LEDS_CPU
  1518. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1519. !ARCH_OMAP) \
  1520. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1521. || MACH_OMAP_PERSEUS2
  1522. depends on LEDS
  1523. help
  1524. If you say Y here, the red LED will be used to give a good real
  1525. time indication of CPU usage, by lighting whenever the idle task
  1526. is not currently executing.
  1527. The LART uses the same LED for both Timer LED and CPU usage LED
  1528. functions. You may choose to use both, but the Timer LED function
  1529. will overrule the CPU usage LED.
  1530. config ALIGNMENT_TRAP
  1531. bool
  1532. depends on CPU_CP15_MMU
  1533. default y if !ARCH_EBSA110
  1534. select HAVE_PROC_CPU if PROC_FS
  1535. help
  1536. ARM processors cannot fetch/store information which is not
  1537. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1538. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1539. fetch/store instructions will be emulated in software if you say
  1540. here, which has a severe performance impact. This is necessary for
  1541. correct operation of some network protocols. With an IP-only
  1542. configuration it is safe to say N, otherwise say Y.
  1543. config UACCESS_WITH_MEMCPY
  1544. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1545. depends on MMU && EXPERIMENTAL
  1546. default y if CPU_FEROCEON
  1547. help
  1548. Implement faster copy_to_user and clear_user methods for CPU
  1549. cores where a 8-word STM instruction give significantly higher
  1550. memory write throughput than a sequence of individual 32bit stores.
  1551. A possible side effect is a slight increase in scheduling latency
  1552. between threads sharing the same address space if they invoke
  1553. such copy operations with large buffers.
  1554. However, if the CPU data cache is using a write-allocate mode,
  1555. this option is unlikely to provide any performance gain.
  1556. config SECCOMP
  1557. bool
  1558. prompt "Enable seccomp to safely compute untrusted bytecode"
  1559. ---help---
  1560. This kernel feature is useful for number crunching applications
  1561. that may need to compute untrusted bytecode during their
  1562. execution. By using pipes or other transports made available to
  1563. the process as file descriptors supporting the read/write
  1564. syscalls, it's possible to isolate those applications in
  1565. their own address space using seccomp. Once seccomp is
  1566. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1567. and the task is only allowed to execute a few safe syscalls
  1568. defined by each seccomp mode.
  1569. config CC_STACKPROTECTOR
  1570. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1571. depends on EXPERIMENTAL
  1572. help
  1573. This option turns on the -fstack-protector GCC feature. This
  1574. feature puts, at the beginning of functions, a canary value on
  1575. the stack just before the return address, and validates
  1576. the value just before actually returning. Stack based buffer
  1577. overflows (that need to overwrite this return address) now also
  1578. overwrite the canary, which gets detected and the attack is then
  1579. neutralized via a kernel panic.
  1580. This feature requires gcc version 4.2 or above.
  1581. config DEPRECATED_PARAM_STRUCT
  1582. bool "Provide old way to pass kernel parameters"
  1583. help
  1584. This was deprecated in 2001 and announced to live on for 5 years.
  1585. Some old boot loaders still use this way.
  1586. endmenu
  1587. menu "Boot options"
  1588. config USE_OF
  1589. bool "Flattened Device Tree support"
  1590. select OF
  1591. select OF_EARLY_FLATTREE
  1592. select IRQ_DOMAIN
  1593. help
  1594. Include support for flattened device tree machine descriptions.
  1595. # Compressed boot loader in ROM. Yes, we really want to ask about
  1596. # TEXT and BSS so we preserve their values in the config files.
  1597. config ZBOOT_ROM_TEXT
  1598. hex "Compressed ROM boot loader base address"
  1599. default "0"
  1600. help
  1601. The physical address at which the ROM-able zImage is to be
  1602. placed in the target. Platforms which normally make use of
  1603. ROM-able zImage formats normally set this to a suitable
  1604. value in their defconfig file.
  1605. If ZBOOT_ROM is not enabled, this has no effect.
  1606. config ZBOOT_ROM_BSS
  1607. hex "Compressed ROM boot loader BSS address"
  1608. default "0"
  1609. help
  1610. The base address of an area of read/write memory in the target
  1611. for the ROM-able zImage which must be available while the
  1612. decompressor is running. It must be large enough to hold the
  1613. entire decompressed kernel plus an additional 128 KiB.
  1614. Platforms which normally make use of ROM-able zImage formats
  1615. normally set this to a suitable value in their defconfig file.
  1616. If ZBOOT_ROM is not enabled, this has no effect.
  1617. config ZBOOT_ROM
  1618. bool "Compressed boot loader in ROM/flash"
  1619. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1620. help
  1621. Say Y here if you intend to execute your compressed kernel image
  1622. (zImage) directly from ROM or flash. If unsure, say N.
  1623. choice
  1624. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1625. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1626. default ZBOOT_ROM_NONE
  1627. help
  1628. Include experimental SD/MMC loading code in the ROM-able zImage.
  1629. With this enabled it is possible to write the the ROM-able zImage
  1630. kernel image to an MMC or SD card and boot the kernel straight
  1631. from the reset vector. At reset the processor Mask ROM will load
  1632. the first part of the the ROM-able zImage which in turn loads the
  1633. rest the kernel image to RAM.
  1634. config ZBOOT_ROM_NONE
  1635. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1636. help
  1637. Do not load image from SD or MMC
  1638. config ZBOOT_ROM_MMCIF
  1639. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1640. help
  1641. Load image from MMCIF hardware block.
  1642. config ZBOOT_ROM_SH_MOBILE_SDHI
  1643. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1644. help
  1645. Load image from SDHI hardware block
  1646. endchoice
  1647. config ARM_APPENDED_DTB
  1648. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1649. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1650. help
  1651. With this option, the boot code will look for a device tree binary
  1652. (DTB) appended to zImage
  1653. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1654. This is meant as a backward compatibility convenience for those
  1655. systems with a bootloader that can't be upgraded to accommodate
  1656. the documented boot protocol using a device tree.
  1657. Beware that there is very little in terms of protection against
  1658. this option being confused by leftover garbage in memory that might
  1659. look like a DTB header after a reboot if no actual DTB is appended
  1660. to zImage. Do not leave this option active in a production kernel
  1661. if you don't intend to always append a DTB. Proper passing of the
  1662. location into r2 of a bootloader provided DTB is always preferable
  1663. to this option.
  1664. config ARM_ATAG_DTB_COMPAT
  1665. bool "Supplement the appended DTB with traditional ATAG information"
  1666. depends on ARM_APPENDED_DTB
  1667. help
  1668. Some old bootloaders can't be updated to a DTB capable one, yet
  1669. they provide ATAGs with memory configuration, the ramdisk address,
  1670. the kernel cmdline string, etc. Such information is dynamically
  1671. provided by the bootloader and can't always be stored in a static
  1672. DTB. To allow a device tree enabled kernel to be used with such
  1673. bootloaders, this option allows zImage to extract the information
  1674. from the ATAG list and store it at run time into the appended DTB.
  1675. config CMDLINE
  1676. string "Default kernel command string"
  1677. default ""
  1678. help
  1679. On some architectures (EBSA110 and CATS), there is currently no way
  1680. for the boot loader to pass arguments to the kernel. For these
  1681. architectures, you should supply some command-line options at build
  1682. time by entering them here. As a minimum, you should specify the
  1683. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1684. choice
  1685. prompt "Kernel command line type" if CMDLINE != ""
  1686. default CMDLINE_FROM_BOOTLOADER
  1687. config CMDLINE_FROM_BOOTLOADER
  1688. bool "Use bootloader kernel arguments if available"
  1689. help
  1690. Uses the command-line options passed by the boot loader. If
  1691. the boot loader doesn't provide any, the default kernel command
  1692. string provided in CMDLINE will be used.
  1693. config CMDLINE_EXTEND
  1694. bool "Extend bootloader kernel arguments"
  1695. help
  1696. The command-line arguments provided by the boot loader will be
  1697. appended to the default kernel command string.
  1698. config CMDLINE_FORCE
  1699. bool "Always use the default kernel command string"
  1700. help
  1701. Always use the default kernel command string, even if the boot
  1702. loader passes other arguments to the kernel.
  1703. This is useful if you cannot or don't want to change the
  1704. command-line options your boot loader passes to the kernel.
  1705. endchoice
  1706. config XIP_KERNEL
  1707. bool "Kernel Execute-In-Place from ROM"
  1708. depends on !ZBOOT_ROM && !ARM_LPAE
  1709. help
  1710. Execute-In-Place allows the kernel to run from non-volatile storage
  1711. directly addressable by the CPU, such as NOR flash. This saves RAM
  1712. space since the text section of the kernel is not loaded from flash
  1713. to RAM. Read-write sections, such as the data section and stack,
  1714. are still copied to RAM. The XIP kernel is not compressed since
  1715. it has to run directly from flash, so it will take more space to
  1716. store it. The flash address used to link the kernel object files,
  1717. and for storing it, is configuration dependent. Therefore, if you
  1718. say Y here, you must know the proper physical address where to
  1719. store the kernel image depending on your own flash memory usage.
  1720. Also note that the make target becomes "make xipImage" rather than
  1721. "make zImage" or "make Image". The final kernel binary to put in
  1722. ROM memory will be arch/arm/boot/xipImage.
  1723. If unsure, say N.
  1724. config XIP_PHYS_ADDR
  1725. hex "XIP Kernel Physical Location"
  1726. depends on XIP_KERNEL
  1727. default "0x00080000"
  1728. help
  1729. This is the physical address in your flash memory the kernel will
  1730. be linked for and stored to. This address is dependent on your
  1731. own flash usage.
  1732. config KEXEC
  1733. bool "Kexec system call (EXPERIMENTAL)"
  1734. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1735. help
  1736. kexec is a system call that implements the ability to shutdown your
  1737. current kernel, and to start another kernel. It is like a reboot
  1738. but it is independent of the system firmware. And like a reboot
  1739. you can start any kernel with it, not just Linux.
  1740. It is an ongoing process to be certain the hardware in a machine
  1741. is properly shutdown, so do not be surprised if this code does not
  1742. initially work for you. It may help to enable device hotplugging
  1743. support.
  1744. config ATAGS_PROC
  1745. bool "Export atags in procfs"
  1746. depends on KEXEC
  1747. default y
  1748. help
  1749. Should the atags used to boot the kernel be exported in an "atags"
  1750. file in procfs. Useful with kexec.
  1751. config CRASH_DUMP
  1752. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1753. depends on EXPERIMENTAL
  1754. help
  1755. Generate crash dump after being started by kexec. This should
  1756. be normally only set in special crash dump kernels which are
  1757. loaded in the main kernel with kexec-tools into a specially
  1758. reserved region and then later executed after a crash by
  1759. kdump/kexec. The crash dump kernel must be compiled to a
  1760. memory address not used by the main kernel
  1761. For more details see Documentation/kdump/kdump.txt
  1762. config AUTO_ZRELADDR
  1763. bool "Auto calculation of the decompressed kernel image address"
  1764. depends on !ZBOOT_ROM && !ARCH_U300
  1765. help
  1766. ZRELADDR is the physical address where the decompressed kernel
  1767. image will be placed. If AUTO_ZRELADDR is selected, the address
  1768. will be determined at run-time by masking the current IP with
  1769. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1770. from start of memory.
  1771. endmenu
  1772. menu "CPU Power Management"
  1773. if ARCH_HAS_CPUFREQ
  1774. source "drivers/cpufreq/Kconfig"
  1775. config CPU_FREQ_IMX
  1776. tristate "CPUfreq driver for i.MX CPUs"
  1777. depends on ARCH_MXC && CPU_FREQ
  1778. help
  1779. This enables the CPUfreq driver for i.MX CPUs.
  1780. config CPU_FREQ_SA1100
  1781. bool
  1782. config CPU_FREQ_SA1110
  1783. bool
  1784. config CPU_FREQ_INTEGRATOR
  1785. tristate "CPUfreq driver for ARM Integrator CPUs"
  1786. depends on ARCH_INTEGRATOR && CPU_FREQ
  1787. default y
  1788. help
  1789. This enables the CPUfreq driver for ARM Integrator CPUs.
  1790. For details, take a look at <file:Documentation/cpu-freq>.
  1791. If in doubt, say Y.
  1792. config CPU_FREQ_PXA
  1793. bool
  1794. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1795. default y
  1796. select CPU_FREQ_TABLE
  1797. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1798. config CPU_FREQ_S3C
  1799. bool
  1800. help
  1801. Internal configuration node for common cpufreq on Samsung SoC
  1802. config CPU_FREQ_S3C24XX
  1803. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1804. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1805. select CPU_FREQ_S3C
  1806. help
  1807. This enables the CPUfreq driver for the Samsung S3C24XX family
  1808. of CPUs.
  1809. For details, take a look at <file:Documentation/cpu-freq>.
  1810. If in doubt, say N.
  1811. config CPU_FREQ_S3C24XX_PLL
  1812. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1813. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1814. help
  1815. Compile in support for changing the PLL frequency from the
  1816. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1817. after a frequency change, so by default it is not enabled.
  1818. This also means that the PLL tables for the selected CPU(s) will
  1819. be built which may increase the size of the kernel image.
  1820. config CPU_FREQ_S3C24XX_DEBUG
  1821. bool "Debug CPUfreq Samsung driver core"
  1822. depends on CPU_FREQ_S3C24XX
  1823. help
  1824. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1825. config CPU_FREQ_S3C24XX_IODEBUG
  1826. bool "Debug CPUfreq Samsung driver IO timing"
  1827. depends on CPU_FREQ_S3C24XX
  1828. help
  1829. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1830. config CPU_FREQ_S3C24XX_DEBUGFS
  1831. bool "Export debugfs for CPUFreq"
  1832. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1833. help
  1834. Export status information via debugfs.
  1835. endif
  1836. source "drivers/cpuidle/Kconfig"
  1837. endmenu
  1838. menu "Floating point emulation"
  1839. comment "At least one emulation must be selected"
  1840. config FPE_NWFPE
  1841. bool "NWFPE math emulation"
  1842. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1843. ---help---
  1844. Say Y to include the NWFPE floating point emulator in the kernel.
  1845. This is necessary to run most binaries. Linux does not currently
  1846. support floating point hardware so you need to say Y here even if
  1847. your machine has an FPA or floating point co-processor podule.
  1848. You may say N here if you are going to load the Acorn FPEmulator
  1849. early in the bootup.
  1850. config FPE_NWFPE_XP
  1851. bool "Support extended precision"
  1852. depends on FPE_NWFPE
  1853. help
  1854. Say Y to include 80-bit support in the kernel floating-point
  1855. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1856. Note that gcc does not generate 80-bit operations by default,
  1857. so in most cases this option only enlarges the size of the
  1858. floating point emulator without any good reason.
  1859. You almost surely want to say N here.
  1860. config FPE_FASTFPE
  1861. bool "FastFPE math emulation (EXPERIMENTAL)"
  1862. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1863. ---help---
  1864. Say Y here to include the FAST floating point emulator in the kernel.
  1865. This is an experimental much faster emulator which now also has full
  1866. precision for the mantissa. It does not support any exceptions.
  1867. It is very simple, and approximately 3-6 times faster than NWFPE.
  1868. It should be sufficient for most programs. It may be not suitable
  1869. for scientific calculations, but you have to check this for yourself.
  1870. If you do not feel you need a faster FP emulation you should better
  1871. choose NWFPE.
  1872. config VFP
  1873. bool "VFP-format floating point maths"
  1874. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1875. help
  1876. Say Y to include VFP support code in the kernel. This is needed
  1877. if your hardware includes a VFP unit.
  1878. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1879. release notes and additional status information.
  1880. Say N if your target does not have VFP hardware.
  1881. config VFPv3
  1882. bool
  1883. depends on VFP
  1884. default y if CPU_V7
  1885. config NEON
  1886. bool "Advanced SIMD (NEON) Extension support"
  1887. depends on VFPv3 && CPU_V7
  1888. help
  1889. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1890. Extension.
  1891. endmenu
  1892. menu "Userspace binary formats"
  1893. source "fs/Kconfig.binfmt"
  1894. config ARTHUR
  1895. tristate "RISC OS personality"
  1896. depends on !AEABI
  1897. help
  1898. Say Y here to include the kernel code necessary if you want to run
  1899. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1900. experimental; if this sounds frightening, say N and sleep in peace.
  1901. You can also say M here to compile this support as a module (which
  1902. will be called arthur).
  1903. endmenu
  1904. menu "Power management options"
  1905. source "kernel/power/Kconfig"
  1906. config ARCH_SUSPEND_POSSIBLE
  1907. depends on !ARCH_S5PC100
  1908. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1909. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1910. def_bool y
  1911. config ARM_CPU_SUSPEND
  1912. def_bool PM_SLEEP
  1913. endmenu
  1914. source "net/Kconfig"
  1915. source "drivers/Kconfig"
  1916. source "fs/Kconfig"
  1917. source "arch/arm/Kconfig.debug"
  1918. source "security/Kconfig"
  1919. source "crypto/Kconfig"
  1920. source "lib/Kconfig"