Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_HAVE_CUSTOM_GPIO_H
  5. select HAVE_AOUT
  6. select HAVE_DMA_API_DEBUG
  7. select HAVE_IDE if PCI || ISA || PCMCIA
  8. select HAVE_DMA_ATTRS
  9. select HAVE_DMA_CONTIGUOUS if (CPU_V6 || CPU_V6K || CPU_V7)
  10. select HAVE_MEMBLOCK
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  14. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  15. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  16. select HAVE_ARCH_KGDB
  17. select HAVE_ARCH_TRACEHOOK
  18. select HAVE_KPROBES if !XIP_KERNEL
  19. select HAVE_KRETPROBES if (HAVE_KPROBES)
  20. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  22. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  23. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  24. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  25. select HAVE_GENERIC_DMA_COHERENT
  26. select HAVE_KERNEL_GZIP
  27. select HAVE_KERNEL_LZO
  28. select HAVE_KERNEL_LZMA
  29. select HAVE_KERNEL_XZ
  30. select HAVE_IRQ_WORK
  31. select HAVE_PERF_EVENTS
  32. select PERF_USE_VMALLOC
  33. select HAVE_REGS_AND_STACK_ACCESS_API
  34. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  35. select HAVE_C_RECORDMCOUNT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HARDIRQS_SW_RESEND
  38. select GENERIC_IRQ_PROBE
  39. select GENERIC_IRQ_SHOW
  40. select GENERIC_IRQ_PROBE
  41. select HARDIRQS_SW_RESEND
  42. select CPU_PM if (SUSPEND || CPU_IDLE)
  43. select GENERIC_PCI_IOMAP
  44. select HAVE_BPF_JIT
  45. select GENERIC_SMP_IDLE_THREAD
  46. select KTIME_SCALAR
  47. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  48. help
  49. The ARM series is a line of low-power-consumption RISC chip designs
  50. licensed by ARM Ltd and targeted at embedded applications and
  51. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  52. manufactured, but legacy ARM-based PC hardware remains popular in
  53. Europe. There is an ARM Linux project with a web page at
  54. <http://www.arm.linux.org.uk/>.
  55. config ARM_HAS_SG_CHAIN
  56. bool
  57. config NEED_SG_DMA_LENGTH
  58. bool
  59. config ARM_DMA_USE_IOMMU
  60. select NEED_SG_DMA_LENGTH
  61. select ARM_HAS_SG_CHAIN
  62. bool
  63. config HAVE_PWM
  64. bool
  65. config MIGHT_HAVE_PCI
  66. bool
  67. config SYS_SUPPORTS_APM_EMULATION
  68. bool
  69. config GENERIC_GPIO
  70. bool
  71. config HAVE_TCM
  72. bool
  73. select GENERIC_ALLOCATOR
  74. config HAVE_PROC_CPU
  75. bool
  76. config NO_IOPORT
  77. bool
  78. config EISA
  79. bool
  80. ---help---
  81. The Extended Industry Standard Architecture (EISA) bus was
  82. developed as an open alternative to the IBM MicroChannel bus.
  83. The EISA bus provided some of the features of the IBM MicroChannel
  84. bus while maintaining backward compatibility with cards made for
  85. the older ISA bus. The EISA bus saw limited use between 1988 and
  86. 1995 when it was made obsolete by the PCI bus.
  87. Say Y here if you are building a kernel for an EISA-based machine.
  88. Otherwise, say N.
  89. config SBUS
  90. bool
  91. config STACKTRACE_SUPPORT
  92. bool
  93. default y
  94. config HAVE_LATENCYTOP_SUPPORT
  95. bool
  96. depends on !SMP
  97. default y
  98. config LOCKDEP_SUPPORT
  99. bool
  100. default y
  101. config TRACE_IRQFLAGS_SUPPORT
  102. bool
  103. default y
  104. config GENERIC_LOCKBREAK
  105. bool
  106. default y
  107. depends on SMP && PREEMPT
  108. config RWSEM_GENERIC_SPINLOCK
  109. bool
  110. default y
  111. config RWSEM_XCHGADD_ALGORITHM
  112. bool
  113. config ARCH_HAS_ILOG2_U32
  114. bool
  115. config ARCH_HAS_ILOG2_U64
  116. bool
  117. config ARCH_HAS_CPUFREQ
  118. bool
  119. help
  120. Internal node to signify that the ARCH has CPUFREQ support
  121. and that the relevant menu configurations are displayed for
  122. it.
  123. config GENERIC_HWEIGHT
  124. bool
  125. default y
  126. config GENERIC_CALIBRATE_DELAY
  127. bool
  128. default y
  129. config ARCH_MAY_HAVE_PC_FDC
  130. bool
  131. config ZONE_DMA
  132. bool
  133. config NEED_DMA_MAP_STATE
  134. def_bool y
  135. config ARCH_HAS_DMA_SET_COHERENT_MASK
  136. bool
  137. config GENERIC_ISA_DMA
  138. bool
  139. config FIQ
  140. bool
  141. config NEED_RET_TO_USER
  142. bool
  143. config ARCH_MTD_XIP
  144. bool
  145. config VECTORS_BASE
  146. hex
  147. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  148. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  149. default 0x00000000
  150. help
  151. The base address of exception vectors.
  152. config ARM_PATCH_PHYS_VIRT
  153. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  154. default y
  155. depends on !XIP_KERNEL && MMU
  156. depends on !ARCH_REALVIEW || !SPARSEMEM
  157. help
  158. Patch phys-to-virt and virt-to-phys translation functions at
  159. boot and module load time according to the position of the
  160. kernel in system memory.
  161. This can only be used with non-XIP MMU kernels where the base
  162. of physical memory is at a 16MB boundary.
  163. Only disable this option if you know that you do not require
  164. this feature (eg, building a kernel for a single machine) and
  165. you need to shrink the kernel to the minimal size.
  166. config NEED_MACH_IO_H
  167. bool
  168. help
  169. Select this when mach/io.h is required to provide special
  170. definitions for this platform. The need for mach/io.h should
  171. be avoided when possible.
  172. config NEED_MACH_MEMORY_H
  173. bool
  174. help
  175. Select this when mach/memory.h is required to provide special
  176. definitions for this platform. The need for mach/memory.h should
  177. be avoided when possible.
  178. config PHYS_OFFSET
  179. hex "Physical address of main memory" if MMU
  180. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  181. default DRAM_BASE if !MMU
  182. help
  183. Please provide the physical address corresponding to the
  184. location of main memory in your system.
  185. config GENERIC_BUG
  186. def_bool y
  187. depends on BUG
  188. source "init/Kconfig"
  189. source "kernel/Kconfig.freezer"
  190. menu "System Type"
  191. config MMU
  192. bool "MMU-based Paged Memory Management Support"
  193. default y
  194. help
  195. Select if you want MMU-based virtualised addressing space
  196. support by paged memory management. If unsure, say 'Y'.
  197. #
  198. # The "ARM system type" choice list is ordered alphabetically by option
  199. # text. Please add new entries in the option alphabetic order.
  200. #
  201. choice
  202. prompt "ARM system type"
  203. default ARCH_VERSATILE
  204. config ARCH_INTEGRATOR
  205. bool "ARM Ltd. Integrator family"
  206. select ARM_AMBA
  207. select ARCH_HAS_CPUFREQ
  208. select CLKDEV_LOOKUP
  209. select HAVE_MACH_CLKDEV
  210. select HAVE_TCM
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select PLAT_VERSATILE
  214. select PLAT_VERSATILE_FPGA_IRQ
  215. select NEED_MACH_IO_H
  216. select NEED_MACH_MEMORY_H
  217. select SPARSE_IRQ
  218. select MULTI_IRQ_HANDLER
  219. help
  220. Support for ARM's Integrator platform.
  221. config ARCH_REALVIEW
  222. bool "ARM Ltd. RealView family"
  223. select ARM_AMBA
  224. select CLKDEV_LOOKUP
  225. select HAVE_MACH_CLKDEV
  226. select ICST
  227. select GENERIC_CLOCKEVENTS
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select PLAT_VERSATILE
  230. select PLAT_VERSATILE_CLCD
  231. select ARM_TIMER_SP804
  232. select GPIO_PL061 if GPIOLIB
  233. select NEED_MACH_MEMORY_H
  234. help
  235. This enables support for ARM Ltd RealView boards.
  236. config ARCH_VERSATILE
  237. bool "ARM Ltd. Versatile family"
  238. select ARM_AMBA
  239. select ARM_VIC
  240. select CLKDEV_LOOKUP
  241. select HAVE_MACH_CLKDEV
  242. select ICST
  243. select GENERIC_CLOCKEVENTS
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select NEED_MACH_IO_H if PCI
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLCD
  248. select PLAT_VERSATILE_FPGA_IRQ
  249. select ARM_TIMER_SP804
  250. help
  251. This enables support for ARM Ltd Versatile board.
  252. config ARCH_VEXPRESS
  253. bool "ARM Ltd. Versatile Express family"
  254. select ARCH_WANT_OPTIONAL_GPIOLIB
  255. select ARM_AMBA
  256. select ARM_TIMER_SP804
  257. select CLKDEV_LOOKUP
  258. select HAVE_MACH_CLKDEV
  259. select GENERIC_CLOCKEVENTS
  260. select HAVE_CLK
  261. select HAVE_PATA_PLATFORM
  262. select ICST
  263. select NO_IOPORT
  264. select PLAT_VERSATILE
  265. select PLAT_VERSATILE_CLCD
  266. help
  267. This enables support for the ARM Ltd Versatile Express boards.
  268. config ARCH_AT91
  269. bool "Atmel AT91"
  270. select ARCH_REQUIRE_GPIOLIB
  271. select HAVE_CLK
  272. select CLKDEV_LOOKUP
  273. select IRQ_DOMAIN
  274. select NEED_MACH_IO_H if PCCARD
  275. help
  276. This enables support for systems based on Atmel
  277. AT91RM9200 and AT91SAM9* processors.
  278. config ARCH_BCMRING
  279. bool "Broadcom BCMRING"
  280. depends on MMU
  281. select CPU_V6
  282. select ARM_AMBA
  283. select ARM_TIMER_SP804
  284. select CLKDEV_LOOKUP
  285. select GENERIC_CLOCKEVENTS
  286. select ARCH_WANT_OPTIONAL_GPIOLIB
  287. help
  288. Support for Broadcom's BCMRing platform.
  289. config ARCH_HIGHBANK
  290. bool "Calxeda Highbank-based"
  291. select ARCH_WANT_OPTIONAL_GPIOLIB
  292. select ARM_AMBA
  293. select ARM_GIC
  294. select ARM_TIMER_SP804
  295. select CACHE_L2X0
  296. select CLKDEV_LOOKUP
  297. select CPU_V7
  298. select GENERIC_CLOCKEVENTS
  299. select HAVE_ARM_SCU
  300. select HAVE_SMP
  301. select SPARSE_IRQ
  302. select USE_OF
  303. help
  304. Support for the Calxeda Highbank SoC based boards.
  305. config ARCH_CLPS711X
  306. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  307. select CPU_ARM720T
  308. select ARCH_USES_GETTIMEOFFSET
  309. select NEED_MACH_MEMORY_H
  310. help
  311. Support for Cirrus Logic 711x/721x/731x based boards.
  312. config ARCH_CNS3XXX
  313. bool "Cavium Networks CNS3XXX family"
  314. select CPU_V6K
  315. select GENERIC_CLOCKEVENTS
  316. select ARM_GIC
  317. select MIGHT_HAVE_CACHE_L2X0
  318. select MIGHT_HAVE_PCI
  319. select PCI_DOMAINS if PCI
  320. help
  321. Support for Cavium Networks CNS3XXX platform.
  322. config ARCH_GEMINI
  323. bool "Cortina Systems Gemini"
  324. select CPU_FA526
  325. select ARCH_REQUIRE_GPIOLIB
  326. select ARCH_USES_GETTIMEOFFSET
  327. help
  328. Support for the Cortina Systems Gemini family SoCs
  329. config ARCH_PRIMA2
  330. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  331. select CPU_V7
  332. select NO_IOPORT
  333. select GENERIC_CLOCKEVENTS
  334. select CLKDEV_LOOKUP
  335. select GENERIC_IRQ_CHIP
  336. select MIGHT_HAVE_CACHE_L2X0
  337. select PINCTRL
  338. select PINCTRL_SIRF
  339. select USE_OF
  340. select ZONE_DMA
  341. help
  342. Support for CSR SiRFSoC ARM Cortex A9 Platform
  343. config ARCH_EBSA110
  344. bool "EBSA-110"
  345. select CPU_SA110
  346. select ISA
  347. select NO_IOPORT
  348. select ARCH_USES_GETTIMEOFFSET
  349. select NEED_MACH_IO_H
  350. select NEED_MACH_MEMORY_H
  351. help
  352. This is an evaluation board for the StrongARM processor available
  353. from Digital. It has limited hardware on-board, including an
  354. Ethernet interface, two PCMCIA sockets, two serial ports and a
  355. parallel port.
  356. config ARCH_EP93XX
  357. bool "EP93xx-based"
  358. select CPU_ARM920T
  359. select ARM_AMBA
  360. select ARM_VIC
  361. select CLKDEV_LOOKUP
  362. select ARCH_REQUIRE_GPIOLIB
  363. select ARCH_HAS_HOLES_MEMORYMODEL
  364. select ARCH_USES_GETTIMEOFFSET
  365. select NEED_MACH_MEMORY_H
  366. help
  367. This enables support for the Cirrus EP93xx series of CPUs.
  368. config ARCH_FOOTBRIDGE
  369. bool "FootBridge"
  370. select CPU_SA110
  371. select FOOTBRIDGE
  372. select GENERIC_CLOCKEVENTS
  373. select HAVE_IDE
  374. select NEED_MACH_IO_H
  375. select NEED_MACH_MEMORY_H
  376. help
  377. Support for systems based on the DC21285 companion chip
  378. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  379. config ARCH_MXC
  380. bool "Freescale MXC/iMX-based"
  381. select GENERIC_CLOCKEVENTS
  382. select ARCH_REQUIRE_GPIOLIB
  383. select CLKDEV_LOOKUP
  384. select CLKSRC_MMIO
  385. select GENERIC_IRQ_CHIP
  386. select MULTI_IRQ_HANDLER
  387. help
  388. Support for Freescale MXC/iMX-based family of processors
  389. config ARCH_MXS
  390. bool "Freescale MXS-based"
  391. select GENERIC_CLOCKEVENTS
  392. select ARCH_REQUIRE_GPIOLIB
  393. select CLKDEV_LOOKUP
  394. select CLKSRC_MMIO
  395. select COMMON_CLK
  396. select HAVE_CLK_PREPARE
  397. select PINCTRL
  398. select USE_OF
  399. help
  400. Support for Freescale MXS-based family of processors
  401. config ARCH_NETX
  402. bool "Hilscher NetX based"
  403. select CLKSRC_MMIO
  404. select CPU_ARM926T
  405. select ARM_VIC
  406. select GENERIC_CLOCKEVENTS
  407. help
  408. This enables support for systems based on the Hilscher NetX Soc
  409. config ARCH_H720X
  410. bool "Hynix HMS720x-based"
  411. select CPU_ARM720T
  412. select ISA_DMA_API
  413. select ARCH_USES_GETTIMEOFFSET
  414. help
  415. This enables support for systems based on the Hynix HMS720x
  416. config ARCH_IOP13XX
  417. bool "IOP13xx-based"
  418. depends on MMU
  419. select CPU_XSC3
  420. select PLAT_IOP
  421. select PCI
  422. select ARCH_SUPPORTS_MSI
  423. select VMSPLIT_1G
  424. select NEED_MACH_IO_H
  425. select NEED_MACH_MEMORY_H
  426. select NEED_RET_TO_USER
  427. help
  428. Support for Intel's IOP13XX (XScale) family of processors.
  429. config ARCH_IOP32X
  430. bool "IOP32x-based"
  431. depends on MMU
  432. select CPU_XSCALE
  433. select NEED_MACH_IO_H
  434. select NEED_RET_TO_USER
  435. select PLAT_IOP
  436. select PCI
  437. select ARCH_REQUIRE_GPIOLIB
  438. help
  439. Support for Intel's 80219 and IOP32X (XScale) family of
  440. processors.
  441. config ARCH_IOP33X
  442. bool "IOP33x-based"
  443. depends on MMU
  444. select CPU_XSCALE
  445. select NEED_MACH_IO_H
  446. select NEED_RET_TO_USER
  447. select PLAT_IOP
  448. select PCI
  449. select ARCH_REQUIRE_GPIOLIB
  450. help
  451. Support for Intel's IOP33X (XScale) family of processors.
  452. config ARCH_IXP4XX
  453. bool "IXP4xx-based"
  454. depends on MMU
  455. select ARCH_HAS_DMA_SET_COHERENT_MASK
  456. select CLKSRC_MMIO
  457. select CPU_XSCALE
  458. select ARCH_REQUIRE_GPIOLIB
  459. select GENERIC_CLOCKEVENTS
  460. select MIGHT_HAVE_PCI
  461. select NEED_MACH_IO_H
  462. select DMABOUNCE if PCI
  463. help
  464. Support for Intel's IXP4XX (XScale) family of processors.
  465. config ARCH_DOVE
  466. bool "Marvell Dove"
  467. select CPU_V7
  468. select PCI
  469. select ARCH_REQUIRE_GPIOLIB
  470. select GENERIC_CLOCKEVENTS
  471. select NEED_MACH_IO_H
  472. select PLAT_ORION
  473. help
  474. Support for the Marvell Dove SoC 88AP510
  475. config ARCH_KIRKWOOD
  476. bool "Marvell Kirkwood"
  477. select CPU_FEROCEON
  478. select PCI
  479. select ARCH_REQUIRE_GPIOLIB
  480. select GENERIC_CLOCKEVENTS
  481. select NEED_MACH_IO_H
  482. select PLAT_ORION
  483. help
  484. Support for the following Marvell Kirkwood series SoCs:
  485. 88F6180, 88F6192 and 88F6281.
  486. config ARCH_LPC32XX
  487. bool "NXP LPC32XX"
  488. select CLKSRC_MMIO
  489. select CPU_ARM926T
  490. select ARCH_REQUIRE_GPIOLIB
  491. select HAVE_IDE
  492. select ARM_AMBA
  493. select USB_ARCH_HAS_OHCI
  494. select CLKDEV_LOOKUP
  495. select GENERIC_CLOCKEVENTS
  496. select USE_OF
  497. help
  498. Support for the NXP LPC32XX family of processors
  499. config ARCH_MV78XX0
  500. bool "Marvell MV78xx0"
  501. select CPU_FEROCEON
  502. select PCI
  503. select ARCH_REQUIRE_GPIOLIB
  504. select GENERIC_CLOCKEVENTS
  505. select NEED_MACH_IO_H
  506. select PLAT_ORION
  507. help
  508. Support for the following Marvell MV78xx0 series SoCs:
  509. MV781x0, MV782x0.
  510. config ARCH_ORION5X
  511. bool "Marvell Orion"
  512. depends on MMU
  513. select CPU_FEROCEON
  514. select PCI
  515. select ARCH_REQUIRE_GPIOLIB
  516. select GENERIC_CLOCKEVENTS
  517. select NEED_MACH_IO_H
  518. select PLAT_ORION
  519. help
  520. Support for the following Marvell Orion 5x series SoCs:
  521. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  522. Orion-2 (5281), Orion-1-90 (6183).
  523. config ARCH_MMP
  524. bool "Marvell PXA168/910/MMP2"
  525. depends on MMU
  526. select ARCH_REQUIRE_GPIOLIB
  527. select CLKDEV_LOOKUP
  528. select GENERIC_CLOCKEVENTS
  529. select GPIO_PXA
  530. select IRQ_DOMAIN
  531. select PLAT_PXA
  532. select SPARSE_IRQ
  533. select GENERIC_ALLOCATOR
  534. help
  535. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  536. config ARCH_KS8695
  537. bool "Micrel/Kendin KS8695"
  538. select CPU_ARM922T
  539. select ARCH_REQUIRE_GPIOLIB
  540. select ARCH_USES_GETTIMEOFFSET
  541. select NEED_MACH_MEMORY_H
  542. help
  543. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  544. System-on-Chip devices.
  545. config ARCH_W90X900
  546. bool "Nuvoton W90X900 CPU"
  547. select CPU_ARM926T
  548. select ARCH_REQUIRE_GPIOLIB
  549. select CLKDEV_LOOKUP
  550. select CLKSRC_MMIO
  551. select GENERIC_CLOCKEVENTS
  552. help
  553. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  554. At present, the w90x900 has been renamed nuc900, regarding
  555. the ARM series product line, you can login the following
  556. link address to know more.
  557. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  558. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  559. config ARCH_TEGRA
  560. bool "NVIDIA Tegra"
  561. select CLKDEV_LOOKUP
  562. select CLKSRC_MMIO
  563. select GENERIC_CLOCKEVENTS
  564. select GENERIC_GPIO
  565. select HAVE_CLK
  566. select HAVE_SMP
  567. select MIGHT_HAVE_CACHE_L2X0
  568. select NEED_MACH_IO_H if PCI
  569. select ARCH_HAS_CPUFREQ
  570. help
  571. This enables support for NVIDIA Tegra based systems (Tegra APX,
  572. Tegra 6xx and Tegra 2 series).
  573. config ARCH_PICOXCELL
  574. bool "Picochip picoXcell"
  575. select ARCH_REQUIRE_GPIOLIB
  576. select ARM_PATCH_PHYS_VIRT
  577. select ARM_VIC
  578. select CPU_V6K
  579. select DW_APB_TIMER
  580. select GENERIC_CLOCKEVENTS
  581. select GENERIC_GPIO
  582. select HAVE_TCM
  583. select NO_IOPORT
  584. select SPARSE_IRQ
  585. select USE_OF
  586. help
  587. This enables support for systems based on the Picochip picoXcell
  588. family of Femtocell devices. The picoxcell support requires device tree
  589. for all boards.
  590. config ARCH_PNX4008
  591. bool "Philips Nexperia PNX4008 Mobile"
  592. select CPU_ARM926T
  593. select CLKDEV_LOOKUP
  594. select ARCH_USES_GETTIMEOFFSET
  595. help
  596. This enables support for Philips PNX4008 mobile platform.
  597. config ARCH_PXA
  598. bool "PXA2xx/PXA3xx-based"
  599. depends on MMU
  600. select ARCH_MTD_XIP
  601. select ARCH_HAS_CPUFREQ
  602. select CLKDEV_LOOKUP
  603. select CLKSRC_MMIO
  604. select ARCH_REQUIRE_GPIOLIB
  605. select GENERIC_CLOCKEVENTS
  606. select GPIO_PXA
  607. select PLAT_PXA
  608. select SPARSE_IRQ
  609. select AUTO_ZRELADDR
  610. select MULTI_IRQ_HANDLER
  611. select ARM_CPU_SUSPEND if PM
  612. select HAVE_IDE
  613. help
  614. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  615. config ARCH_MSM
  616. bool "Qualcomm MSM"
  617. select HAVE_CLK
  618. select GENERIC_CLOCKEVENTS
  619. select ARCH_REQUIRE_GPIOLIB
  620. select CLKDEV_LOOKUP
  621. help
  622. Support for Qualcomm MSM/QSD based systems. This runs on the
  623. apps processor of the MSM/QSD and depends on a shared memory
  624. interface to the modem processor which runs the baseband
  625. stack and controls some vital subsystems
  626. (clock and power control, etc).
  627. config ARCH_SHMOBILE
  628. bool "Renesas SH-Mobile / R-Mobile"
  629. select HAVE_CLK
  630. select CLKDEV_LOOKUP
  631. select HAVE_MACH_CLKDEV
  632. select HAVE_SMP
  633. select GENERIC_CLOCKEVENTS
  634. select MIGHT_HAVE_CACHE_L2X0
  635. select NO_IOPORT
  636. select SPARSE_IRQ
  637. select MULTI_IRQ_HANDLER
  638. select PM_GENERIC_DOMAINS if PM
  639. select NEED_MACH_MEMORY_H
  640. help
  641. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  642. config ARCH_RPC
  643. bool "RiscPC"
  644. select ARCH_ACORN
  645. select FIQ
  646. select ARCH_MAY_HAVE_PC_FDC
  647. select HAVE_PATA_PLATFORM
  648. select ISA_DMA_API
  649. select NO_IOPORT
  650. select ARCH_SPARSEMEM_ENABLE
  651. select ARCH_USES_GETTIMEOFFSET
  652. select HAVE_IDE
  653. select NEED_MACH_IO_H
  654. select NEED_MACH_MEMORY_H
  655. help
  656. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  657. CD-ROM interface, serial and parallel port, and the floppy drive.
  658. config ARCH_SA1100
  659. bool "SA1100-based"
  660. select CLKSRC_MMIO
  661. select CPU_SA1100
  662. select ISA
  663. select ARCH_SPARSEMEM_ENABLE
  664. select ARCH_MTD_XIP
  665. select ARCH_HAS_CPUFREQ
  666. select CPU_FREQ
  667. select GENERIC_CLOCKEVENTS
  668. select CLKDEV_LOOKUP
  669. select ARCH_REQUIRE_GPIOLIB
  670. select HAVE_IDE
  671. select NEED_MACH_MEMORY_H
  672. select SPARSE_IRQ
  673. help
  674. Support for StrongARM 11x0 based boards.
  675. config ARCH_S3C24XX
  676. bool "Samsung S3C24XX SoCs"
  677. select GENERIC_GPIO
  678. select ARCH_HAS_CPUFREQ
  679. select HAVE_CLK
  680. select CLKDEV_LOOKUP
  681. select ARCH_USES_GETTIMEOFFSET
  682. select HAVE_S3C2410_I2C if I2C
  683. select HAVE_S3C_RTC if RTC_CLASS
  684. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  685. select NEED_MACH_IO_H
  686. help
  687. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  688. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  689. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  690. Samsung SMDK2410 development board (and derivatives).
  691. config ARCH_S3C64XX
  692. bool "Samsung S3C64XX"
  693. select PLAT_SAMSUNG
  694. select CPU_V6
  695. select ARM_VIC
  696. select HAVE_CLK
  697. select HAVE_TCM
  698. select CLKDEV_LOOKUP
  699. select NO_IOPORT
  700. select ARCH_USES_GETTIMEOFFSET
  701. select ARCH_HAS_CPUFREQ
  702. select ARCH_REQUIRE_GPIOLIB
  703. select SAMSUNG_CLKSRC
  704. select SAMSUNG_IRQ_VIC_TIMER
  705. select S3C_GPIO_TRACK
  706. select S3C_DEV_NAND
  707. select USB_ARCH_HAS_OHCI
  708. select SAMSUNG_GPIOLIB_4BIT
  709. select HAVE_S3C2410_I2C if I2C
  710. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  711. help
  712. Samsung S3C64XX series based systems
  713. config ARCH_S5P64X0
  714. bool "Samsung S5P6440 S5P6450"
  715. select CPU_V6
  716. select GENERIC_GPIO
  717. select HAVE_CLK
  718. select CLKDEV_LOOKUP
  719. select CLKSRC_MMIO
  720. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  721. select GENERIC_CLOCKEVENTS
  722. select HAVE_S3C2410_I2C if I2C
  723. select HAVE_S3C_RTC if RTC_CLASS
  724. help
  725. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  726. SMDK6450.
  727. config ARCH_S5PC100
  728. bool "Samsung S5PC100"
  729. select GENERIC_GPIO
  730. select HAVE_CLK
  731. select CLKDEV_LOOKUP
  732. select CPU_V7
  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 ARCH_HAS_CPUFREQ
  749. select GENERIC_CLOCKEVENTS
  750. select HAVE_S3C2410_I2C if I2C
  751. select HAVE_S3C_RTC if RTC_CLASS
  752. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  753. select NEED_MACH_MEMORY_H
  754. help
  755. Samsung S5PV210/S5PC110 series based systems
  756. config ARCH_EXYNOS
  757. bool "SAMSUNG EXYNOS"
  758. select CPU_V7
  759. select ARCH_SPARSEMEM_ENABLE
  760. select ARCH_HAS_HOLES_MEMORYMODEL
  761. select GENERIC_GPIO
  762. select HAVE_CLK
  763. select CLKDEV_LOOKUP
  764. select ARCH_HAS_CPUFREQ
  765. select GENERIC_CLOCKEVENTS
  766. select HAVE_S3C_RTC if RTC_CLASS
  767. select HAVE_S3C2410_I2C if I2C
  768. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  769. select NEED_MACH_MEMORY_H
  770. help
  771. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  772. config ARCH_SHARK
  773. bool "Shark"
  774. select CPU_SA110
  775. select ISA
  776. select ISA_DMA
  777. select ZONE_DMA
  778. select PCI
  779. select ARCH_USES_GETTIMEOFFSET
  780. select NEED_MACH_MEMORY_H
  781. select NEED_MACH_IO_H
  782. help
  783. Support for the StrongARM based Digital DNARD machine, also known
  784. as "Shark" (<http://www.shark-linux.de/shark.html>).
  785. config ARCH_U300
  786. bool "ST-Ericsson U300 Series"
  787. depends on MMU
  788. select CLKSRC_MMIO
  789. select CPU_ARM926T
  790. select HAVE_TCM
  791. select ARM_AMBA
  792. select ARM_PATCH_PHYS_VIRT
  793. select ARM_VIC
  794. select GENERIC_CLOCKEVENTS
  795. select CLKDEV_LOOKUP
  796. select HAVE_MACH_CLKDEV
  797. select GENERIC_GPIO
  798. select ARCH_REQUIRE_GPIOLIB
  799. help
  800. Support for ST-Ericsson U300 series mobile platforms.
  801. config ARCH_U8500
  802. bool "ST-Ericsson U8500 Series"
  803. depends on MMU
  804. select CPU_V7
  805. select ARM_AMBA
  806. select GENERIC_CLOCKEVENTS
  807. select CLKDEV_LOOKUP
  808. select ARCH_REQUIRE_GPIOLIB
  809. select ARCH_HAS_CPUFREQ
  810. select HAVE_SMP
  811. select MIGHT_HAVE_CACHE_L2X0
  812. help
  813. Support for ST-Ericsson's Ux500 architecture
  814. config ARCH_NOMADIK
  815. bool "STMicroelectronics Nomadik"
  816. select ARM_AMBA
  817. select ARM_VIC
  818. select CPU_ARM926T
  819. select CLKDEV_LOOKUP
  820. select GENERIC_CLOCKEVENTS
  821. select PINCTRL
  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 ARCH_HAS_HOLES_MEMORYMODEL
  846. help
  847. Support for TI's OMAP platform (OMAP1/2/3/4).
  848. config PLAT_SPEAR
  849. bool "ST SPEAr"
  850. select ARM_AMBA
  851. select ARCH_REQUIRE_GPIOLIB
  852. select CLKDEV_LOOKUP
  853. select COMMON_CLK
  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-kirkwood/Kconfig"
  903. source "arch/arm/mach-ks8695/Kconfig"
  904. source "arch/arm/mach-lpc32xx/Kconfig"
  905. source "arch/arm/mach-msm/Kconfig"
  906. source "arch/arm/mach-mv78xx0/Kconfig"
  907. source "arch/arm/plat-mxc/Kconfig"
  908. source "arch/arm/mach-mxs/Kconfig"
  909. source "arch/arm/mach-netx/Kconfig"
  910. source "arch/arm/mach-nomadik/Kconfig"
  911. source "arch/arm/plat-nomadik/Kconfig"
  912. source "arch/arm/plat-omap/Kconfig"
  913. source "arch/arm/mach-omap1/Kconfig"
  914. source "arch/arm/mach-omap2/Kconfig"
  915. source "arch/arm/mach-orion5x/Kconfig"
  916. source "arch/arm/mach-pxa/Kconfig"
  917. source "arch/arm/plat-pxa/Kconfig"
  918. source "arch/arm/mach-mmp/Kconfig"
  919. source "arch/arm/mach-realview/Kconfig"
  920. source "arch/arm/mach-sa1100/Kconfig"
  921. source "arch/arm/plat-samsung/Kconfig"
  922. source "arch/arm/plat-s3c24xx/Kconfig"
  923. source "arch/arm/plat-spear/Kconfig"
  924. source "arch/arm/mach-s3c24xx/Kconfig"
  925. if ARCH_S3C24XX
  926. source "arch/arm/mach-s3c2412/Kconfig"
  927. source "arch/arm/mach-s3c2440/Kconfig"
  928. endif
  929. if ARCH_S3C64XX
  930. source "arch/arm/mach-s3c64xx/Kconfig"
  931. endif
  932. source "arch/arm/mach-s5p64x0/Kconfig"
  933. source "arch/arm/mach-s5pc100/Kconfig"
  934. source "arch/arm/mach-s5pv210/Kconfig"
  935. source "arch/arm/mach-exynos/Kconfig"
  936. source "arch/arm/mach-shmobile/Kconfig"
  937. source "arch/arm/mach-tegra/Kconfig"
  938. source "arch/arm/mach-u300/Kconfig"
  939. source "arch/arm/mach-ux500/Kconfig"
  940. source "arch/arm/mach-versatile/Kconfig"
  941. source "arch/arm/mach-vexpress/Kconfig"
  942. source "arch/arm/plat-versatile/Kconfig"
  943. source "arch/arm/mach-vt8500/Kconfig"
  944. source "arch/arm/mach-w90x900/Kconfig"
  945. # Definitions to make life easier
  946. config ARCH_ACORN
  947. bool
  948. config PLAT_IOP
  949. bool
  950. select GENERIC_CLOCKEVENTS
  951. config PLAT_ORION
  952. bool
  953. select CLKSRC_MMIO
  954. select GENERIC_IRQ_CHIP
  955. select COMMON_CLK
  956. config PLAT_PXA
  957. bool
  958. config PLAT_VERSATILE
  959. bool
  960. config ARM_TIMER_SP804
  961. bool
  962. select CLKSRC_MMIO
  963. select HAVE_SCHED_CLOCK
  964. source arch/arm/mm/Kconfig
  965. config ARM_NR_BANKS
  966. int
  967. default 16 if ARCH_EP93XX
  968. default 8
  969. config IWMMXT
  970. bool "Enable iWMMXt support"
  971. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  972. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  973. help
  974. Enable support for iWMMXt context switching at run time if
  975. running on a CPU that supports it.
  976. config XSCALE_PMU
  977. bool
  978. depends on CPU_XSCALE
  979. default y
  980. config CPU_HAS_PMU
  981. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  982. (!ARCH_OMAP3 || OMAP3_EMU)
  983. default y
  984. bool
  985. config MULTI_IRQ_HANDLER
  986. bool
  987. help
  988. Allow each machine to specify it's own IRQ handler at run time.
  989. if !MMU
  990. source "arch/arm/Kconfig-nommu"
  991. endif
  992. config ARM_ERRATA_326103
  993. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  994. depends on CPU_V6
  995. help
  996. Executing a SWP instruction to read-only memory does not set bit 11
  997. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  998. treat the access as a read, preventing a COW from occurring and
  999. causing the faulting task to livelock.
  1000. config ARM_ERRATA_411920
  1001. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1002. depends on CPU_V6 || CPU_V6K
  1003. help
  1004. Invalidation of the Instruction Cache operation can
  1005. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1006. It does not affect the MPCore. This option enables the ARM Ltd.
  1007. recommended workaround.
  1008. config ARM_ERRATA_430973
  1009. bool "ARM errata: Stale prediction on replaced interworking branch"
  1010. depends on CPU_V7
  1011. help
  1012. This option enables the workaround for the 430973 Cortex-A8
  1013. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1014. interworking branch is replaced with another code sequence at the
  1015. same virtual address, whether due to self-modifying code or virtual
  1016. to physical address re-mapping, Cortex-A8 does not recover from the
  1017. stale interworking branch prediction. This results in Cortex-A8
  1018. executing the new code sequence in the incorrect ARM or Thumb state.
  1019. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1020. and also flushes the branch target cache at every context switch.
  1021. Note that setting specific bits in the ACTLR register may not be
  1022. available in non-secure mode.
  1023. config ARM_ERRATA_458693
  1024. bool "ARM errata: Processor deadlock when a false hazard is created"
  1025. depends on CPU_V7
  1026. help
  1027. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1028. erratum. For very specific sequences of memory operations, it is
  1029. possible for a hazard condition intended for a cache line to instead
  1030. be incorrectly associated with a different cache line. This false
  1031. hazard might then cause a processor deadlock. The workaround enables
  1032. the L1 caching of the NEON accesses and disables the PLD instruction
  1033. in the ACTLR register. Note that setting specific bits in the ACTLR
  1034. register may not be available in non-secure mode.
  1035. config ARM_ERRATA_460075
  1036. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1037. depends on CPU_V7
  1038. help
  1039. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1040. erratum. Any asynchronous access to the L2 cache may encounter a
  1041. situation in which recent store transactions to the L2 cache are lost
  1042. and overwritten with stale memory contents from external memory. The
  1043. workaround disables the write-allocate mode for the L2 cache via the
  1044. ACTLR register. Note that setting specific bits in the ACTLR register
  1045. may not be available in non-secure mode.
  1046. config ARM_ERRATA_742230
  1047. bool "ARM errata: DMB operation may be faulty"
  1048. depends on CPU_V7 && SMP
  1049. help
  1050. This option enables the workaround for the 742230 Cortex-A9
  1051. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1052. between two write operations may not ensure the correct visibility
  1053. ordering of the two writes. This workaround sets a specific bit in
  1054. the diagnostic register of the Cortex-A9 which causes the DMB
  1055. instruction to behave as a DSB, ensuring the correct behaviour of
  1056. the two writes.
  1057. config ARM_ERRATA_742231
  1058. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1059. depends on CPU_V7 && SMP
  1060. help
  1061. This option enables the workaround for the 742231 Cortex-A9
  1062. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1063. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1064. accessing some data located in the same cache line, may get corrupted
  1065. data due to bad handling of the address hazard when the line gets
  1066. replaced from one of the CPUs at the same time as another CPU is
  1067. accessing it. This workaround sets specific bits in the diagnostic
  1068. register of the Cortex-A9 which reduces the linefill issuing
  1069. capabilities of the processor.
  1070. config PL310_ERRATA_588369
  1071. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1072. depends on CACHE_L2X0
  1073. help
  1074. The PL310 L2 cache controller implements three types of Clean &
  1075. Invalidate maintenance operations: by Physical Address
  1076. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1077. They are architecturally defined to behave as the execution of a
  1078. clean operation followed immediately by an invalidate operation,
  1079. both performing to the same memory location. This functionality
  1080. is not correctly implemented in PL310 as clean lines are not
  1081. invalidated as a result of these operations.
  1082. config ARM_ERRATA_720789
  1083. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1084. depends on CPU_V7
  1085. help
  1086. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1087. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1088. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1089. As a consequence of this erratum, some TLB entries which should be
  1090. invalidated are not, resulting in an incoherency in the system page
  1091. tables. The workaround changes the TLB flushing routines to invalidate
  1092. entries regardless of the ASID.
  1093. config PL310_ERRATA_727915
  1094. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1095. depends on CACHE_L2X0
  1096. help
  1097. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1098. operation (offset 0x7FC). This operation runs in background so that
  1099. PL310 can handle normal accesses while it is in progress. Under very
  1100. rare circumstances, due to this erratum, write data can be lost when
  1101. PL310 treats a cacheable write transaction during a Clean &
  1102. Invalidate by Way operation.
  1103. config ARM_ERRATA_743622
  1104. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1105. depends on CPU_V7
  1106. help
  1107. This option enables the workaround for the 743622 Cortex-A9
  1108. (r2p*) erratum. Under very rare conditions, a faulty
  1109. optimisation in the Cortex-A9 Store Buffer may lead to data
  1110. corruption. This workaround sets a specific bit in the diagnostic
  1111. register of the Cortex-A9 which disables the Store Buffer
  1112. optimisation, preventing the defect from occurring. This has no
  1113. visible impact on the overall performance or power consumption of the
  1114. processor.
  1115. config ARM_ERRATA_751472
  1116. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1117. depends on CPU_V7
  1118. help
  1119. This option enables the workaround for the 751472 Cortex-A9 (prior
  1120. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1121. completion of a following broadcasted operation if the second
  1122. operation is received by a CPU before the ICIALLUIS has completed,
  1123. potentially leading to corrupted entries in the cache or TLB.
  1124. config PL310_ERRATA_753970
  1125. bool "PL310 errata: cache sync operation may be faulty"
  1126. depends on CACHE_PL310
  1127. help
  1128. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1129. Under some condition the effect of cache sync operation on
  1130. the store buffer still remains when the operation completes.
  1131. This means that the store buffer is always asked to drain and
  1132. this prevents it from merging any further writes. The workaround
  1133. is to replace the normal offset of cache sync operation (0x730)
  1134. by another offset targeting an unmapped PL310 register 0x740.
  1135. This has the same effect as the cache sync operation: store buffer
  1136. drain and waiting for all buffers empty.
  1137. config ARM_ERRATA_754322
  1138. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1139. depends on CPU_V7
  1140. help
  1141. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1142. r3p*) erratum. A speculative memory access may cause a page table walk
  1143. which starts prior to an ASID switch but completes afterwards. This
  1144. can populate the micro-TLB with a stale entry which may be hit with
  1145. the new ASID. This workaround places two dsb instructions in the mm
  1146. switching code so that no page table walks can cross the ASID switch.
  1147. config ARM_ERRATA_754327
  1148. bool "ARM errata: no automatic Store Buffer drain"
  1149. depends on CPU_V7 && SMP
  1150. help
  1151. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1152. r2p0) erratum. The Store Buffer does not have any automatic draining
  1153. mechanism and therefore a livelock may occur if an external agent
  1154. continuously polls a memory location waiting to observe an update.
  1155. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1156. written polling loops from denying visibility of updates to memory.
  1157. config ARM_ERRATA_364296
  1158. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1159. depends on CPU_V6 && !SMP
  1160. help
  1161. This options enables the workaround for the 364296 ARM1136
  1162. r0p2 erratum (possible cache data corruption with
  1163. hit-under-miss enabled). It sets the undocumented bit 31 in
  1164. the auxiliary control register and the FI bit in the control
  1165. register, thus disabling hit-under-miss without putting the
  1166. processor into full low interrupt latency mode. ARM11MPCore
  1167. is not affected.
  1168. config ARM_ERRATA_764369
  1169. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1170. depends on CPU_V7 && SMP
  1171. help
  1172. This option enables the workaround for erratum 764369
  1173. affecting Cortex-A9 MPCore with two or more processors (all
  1174. current revisions). Under certain timing circumstances, a data
  1175. cache line maintenance operation by MVA targeting an Inner
  1176. Shareable memory region may fail to proceed up to either the
  1177. Point of Coherency or to the Point of Unification of the
  1178. system. This workaround adds a DSB instruction before the
  1179. relevant cache maintenance functions and sets a specific bit
  1180. in the diagnostic control register of the SCU.
  1181. config PL310_ERRATA_769419
  1182. bool "PL310 errata: no automatic Store Buffer drain"
  1183. depends on CACHE_L2X0
  1184. help
  1185. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1186. not automatically drain. This can cause normal, non-cacheable
  1187. writes to be retained when the memory system is idle, leading
  1188. to suboptimal I/O performance for drivers using coherent DMA.
  1189. This option adds a write barrier to the cpu_idle loop so that,
  1190. on systems with an outer cache, the store buffer is drained
  1191. explicitly.
  1192. endmenu
  1193. source "arch/arm/common/Kconfig"
  1194. menu "Bus support"
  1195. config ARM_AMBA
  1196. bool
  1197. config ISA
  1198. bool
  1199. help
  1200. Find out whether you have ISA slots on your motherboard. ISA is the
  1201. name of a bus system, i.e. the way the CPU talks to the other stuff
  1202. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1203. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1204. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1205. # Select ISA DMA controller support
  1206. config ISA_DMA
  1207. bool
  1208. select ISA_DMA_API
  1209. # Select ISA DMA interface
  1210. config ISA_DMA_API
  1211. bool
  1212. config PCI
  1213. bool "PCI support" if MIGHT_HAVE_PCI
  1214. help
  1215. Find out whether you have a PCI motherboard. PCI is the name of a
  1216. bus system, i.e. the way the CPU talks to the other stuff inside
  1217. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1218. VESA. If you have PCI, say Y, otherwise N.
  1219. config PCI_DOMAINS
  1220. bool
  1221. depends on PCI
  1222. config PCI_NANOENGINE
  1223. bool "BSE nanoEngine PCI support"
  1224. depends on SA1100_NANOENGINE
  1225. help
  1226. Enable PCI on the BSE nanoEngine board.
  1227. config PCI_SYSCALL
  1228. def_bool PCI
  1229. # Select the host bridge type
  1230. config PCI_HOST_VIA82C505
  1231. bool
  1232. depends on PCI && ARCH_SHARK
  1233. default y
  1234. config PCI_HOST_ITE8152
  1235. bool
  1236. depends on PCI && MACH_ARMCORE
  1237. default y
  1238. select DMABOUNCE
  1239. source "drivers/pci/Kconfig"
  1240. source "drivers/pcmcia/Kconfig"
  1241. endmenu
  1242. menu "Kernel Features"
  1243. config HAVE_SMP
  1244. bool
  1245. help
  1246. This option should be selected by machines which have an SMP-
  1247. capable CPU.
  1248. The only effect of this option is to make the SMP-related
  1249. options available to the user for configuration.
  1250. config SMP
  1251. bool "Symmetric Multi-Processing"
  1252. depends on CPU_V6K || CPU_V7
  1253. depends on GENERIC_CLOCKEVENTS
  1254. depends on HAVE_SMP
  1255. depends on MMU
  1256. select USE_GENERIC_SMP_HELPERS
  1257. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1258. help
  1259. This enables support for systems with more than one CPU. If you have
  1260. a system with only one CPU, like most personal computers, say N. If
  1261. you have a system with more than one CPU, say Y.
  1262. If you say N here, the kernel will run on single and multiprocessor
  1263. machines, but will use only one CPU of a multiprocessor machine. If
  1264. you say Y here, the kernel will run on many, but not all, single
  1265. processor machines. On a single processor machine, the kernel will
  1266. run faster if you say N here.
  1267. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1268. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1269. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1270. If you don't know what to do here, say N.
  1271. config SMP_ON_UP
  1272. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1273. depends on EXPERIMENTAL
  1274. depends on SMP && !XIP_KERNEL
  1275. default y
  1276. help
  1277. SMP kernels contain instructions which fail on non-SMP processors.
  1278. Enabling this option allows the kernel to modify itself to make
  1279. these instructions safe. Disabling it allows about 1K of space
  1280. savings.
  1281. If you don't know what to do here, say Y.
  1282. config ARM_CPU_TOPOLOGY
  1283. bool "Support cpu topology definition"
  1284. depends on SMP && CPU_V7
  1285. default y
  1286. help
  1287. Support ARM cpu topology definition. The MPIDR register defines
  1288. affinity between processors which is then used to describe the cpu
  1289. topology of an ARM System.
  1290. config SCHED_MC
  1291. bool "Multi-core scheduler support"
  1292. depends on ARM_CPU_TOPOLOGY
  1293. help
  1294. Multi-core scheduler support improves the CPU scheduler's decision
  1295. making when dealing with multi-core CPU chips at a cost of slightly
  1296. increased overhead in some places. If unsure say N here.
  1297. config SCHED_SMT
  1298. bool "SMT scheduler support"
  1299. depends on ARM_CPU_TOPOLOGY
  1300. help
  1301. Improves the CPU scheduler's decision making when dealing with
  1302. MultiThreading at a cost of slightly increased overhead in some
  1303. places. If unsure say N here.
  1304. config HAVE_ARM_SCU
  1305. bool
  1306. help
  1307. This option enables support for the ARM system coherency unit
  1308. config ARM_ARCH_TIMER
  1309. bool "Architected timer support"
  1310. depends on CPU_V7
  1311. help
  1312. This option enables support for the ARM architected timer
  1313. config HAVE_ARM_TWD
  1314. bool
  1315. depends on SMP
  1316. help
  1317. This options enables support for the ARM timer and watchdog unit
  1318. choice
  1319. prompt "Memory split"
  1320. default VMSPLIT_3G
  1321. help
  1322. Select the desired split between kernel and user memory.
  1323. If you are not absolutely sure what you are doing, leave this
  1324. option alone!
  1325. config VMSPLIT_3G
  1326. bool "3G/1G user/kernel split"
  1327. config VMSPLIT_2G
  1328. bool "2G/2G user/kernel split"
  1329. config VMSPLIT_1G
  1330. bool "1G/3G user/kernel split"
  1331. endchoice
  1332. config PAGE_OFFSET
  1333. hex
  1334. default 0x40000000 if VMSPLIT_1G
  1335. default 0x80000000 if VMSPLIT_2G
  1336. default 0xC0000000
  1337. config NR_CPUS
  1338. int "Maximum number of CPUs (2-32)"
  1339. range 2 32
  1340. depends on SMP
  1341. default "4"
  1342. config HOTPLUG_CPU
  1343. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1344. depends on SMP && HOTPLUG && EXPERIMENTAL
  1345. help
  1346. Say Y here to experiment with turning CPUs off and on. CPUs
  1347. can be controlled through /sys/devices/system/cpu.
  1348. config LOCAL_TIMERS
  1349. bool "Use local timer interrupts"
  1350. depends on SMP
  1351. default y
  1352. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1353. help
  1354. Enable support for local timers on SMP platforms, rather then the
  1355. legacy IPI broadcast method. Local timers allows the system
  1356. accounting to be spread across the timer interval, preventing a
  1357. "thundering herd" at every timer tick.
  1358. config ARCH_NR_GPIO
  1359. int
  1360. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1361. default 355 if ARCH_U8500
  1362. default 264 if MACH_H4700
  1363. default 0
  1364. help
  1365. Maximum number of GPIOs in the system.
  1366. If unsure, leave the default value.
  1367. source kernel/Kconfig.preempt
  1368. config HZ
  1369. int
  1370. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1371. ARCH_S5PV210 || ARCH_EXYNOS4
  1372. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1373. default AT91_TIMER_HZ if ARCH_AT91
  1374. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1375. default 100
  1376. config THUMB2_KERNEL
  1377. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1378. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1379. select AEABI
  1380. select ARM_ASM_UNIFIED
  1381. select ARM_UNWIND
  1382. help
  1383. By enabling this option, the kernel will be compiled in
  1384. Thumb-2 mode. A compiler/assembler that understand the unified
  1385. ARM-Thumb syntax is needed.
  1386. If unsure, say N.
  1387. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1388. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1389. depends on THUMB2_KERNEL && MODULES
  1390. default y
  1391. help
  1392. Various binutils versions can resolve Thumb-2 branches to
  1393. locally-defined, preemptible global symbols as short-range "b.n"
  1394. branch instructions.
  1395. This is a problem, because there's no guarantee the final
  1396. destination of the symbol, or any candidate locations for a
  1397. trampoline, are within range of the branch. For this reason, the
  1398. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1399. relocation in modules at all, and it makes little sense to add
  1400. support.
  1401. The symptom is that the kernel fails with an "unsupported
  1402. relocation" error when loading some modules.
  1403. Until fixed tools are available, passing
  1404. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1405. code which hits this problem, at the cost of a bit of extra runtime
  1406. stack usage in some cases.
  1407. The problem is described in more detail at:
  1408. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1409. Only Thumb-2 kernels are affected.
  1410. Unless you are sure your tools don't have this problem, say Y.
  1411. config ARM_ASM_UNIFIED
  1412. bool
  1413. config AEABI
  1414. bool "Use the ARM EABI to compile the kernel"
  1415. help
  1416. This option allows for the kernel to be compiled using the latest
  1417. ARM ABI (aka EABI). This is only useful if you are using a user
  1418. space environment that is also compiled with EABI.
  1419. Since there are major incompatibilities between the legacy ABI and
  1420. EABI, especially with regard to structure member alignment, this
  1421. option also changes the kernel syscall calling convention to
  1422. disambiguate both ABIs and allow for backward compatibility support
  1423. (selected with CONFIG_OABI_COMPAT).
  1424. To use this you need GCC version 4.0.0 or later.
  1425. config OABI_COMPAT
  1426. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1427. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1428. default y
  1429. help
  1430. This option preserves the old syscall interface along with the
  1431. new (ARM EABI) one. It also provides a compatibility layer to
  1432. intercept syscalls that have structure arguments which layout
  1433. in memory differs between the legacy ABI and the new ARM EABI
  1434. (only for non "thumb" binaries). This option adds a tiny
  1435. overhead to all syscalls and produces a slightly larger kernel.
  1436. If you know you'll be using only pure EABI user space then you
  1437. can say N here. If this option is not selected and you attempt
  1438. to execute a legacy ABI binary then the result will be
  1439. UNPREDICTABLE (in fact it can be predicted that it won't work
  1440. at all). If in doubt say Y.
  1441. config ARCH_HAS_HOLES_MEMORYMODEL
  1442. bool
  1443. config ARCH_SPARSEMEM_ENABLE
  1444. bool
  1445. config ARCH_SPARSEMEM_DEFAULT
  1446. def_bool ARCH_SPARSEMEM_ENABLE
  1447. config ARCH_SELECT_MEMORY_MODEL
  1448. def_bool ARCH_SPARSEMEM_ENABLE
  1449. config HAVE_ARCH_PFN_VALID
  1450. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1451. config HIGHMEM
  1452. bool "High Memory Support"
  1453. depends on MMU
  1454. help
  1455. The address space of ARM processors is only 4 Gigabytes large
  1456. and it has to accommodate user address space, kernel address
  1457. space as well as some memory mapped IO. That means that, if you
  1458. have a large amount of physical memory and/or IO, not all of the
  1459. memory can be "permanently mapped" by the kernel. The physical
  1460. memory that is not permanently mapped is called "high memory".
  1461. Depending on the selected kernel/user memory split, minimum
  1462. vmalloc space and actual amount of RAM, you may not need this
  1463. option which should result in a slightly faster kernel.
  1464. If unsure, say n.
  1465. config HIGHPTE
  1466. bool "Allocate 2nd-level pagetables from highmem"
  1467. depends on HIGHMEM
  1468. config HW_PERF_EVENTS
  1469. bool "Enable hardware performance counter support for perf events"
  1470. depends on PERF_EVENTS && CPU_HAS_PMU
  1471. default y
  1472. help
  1473. Enable hardware performance counter support for perf events. If
  1474. disabled, perf events will use software events only.
  1475. source "mm/Kconfig"
  1476. config FORCE_MAX_ZONEORDER
  1477. int "Maximum zone order" if ARCH_SHMOBILE
  1478. range 11 64 if ARCH_SHMOBILE
  1479. default "9" if SA1111
  1480. default "11"
  1481. help
  1482. The kernel memory allocator divides physically contiguous memory
  1483. blocks into "zones", where each zone is a power of two number of
  1484. pages. This option selects the largest power of two that the kernel
  1485. keeps in the memory allocator. If you need to allocate very large
  1486. blocks of physically contiguous memory, then you may need to
  1487. increase this value.
  1488. This config option is actually maximum order plus one. For example,
  1489. a value of 11 means that the largest free memory block is 2^10 pages.
  1490. config LEDS
  1491. bool "Timer and CPU usage LEDs"
  1492. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1493. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1494. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1495. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1496. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1497. ARCH_AT91 || ARCH_DAVINCI || \
  1498. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1499. help
  1500. If you say Y here, the LEDs on your machine will be used
  1501. to provide useful information about your current system status.
  1502. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1503. be able to select which LEDs are active using the options below. If
  1504. you are compiling a kernel for the EBSA-110 or the LART however, the
  1505. red LED will simply flash regularly to indicate that the system is
  1506. still functional. It is safe to say Y here if you have a CATS
  1507. system, but the driver will do nothing.
  1508. config LEDS_TIMER
  1509. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1510. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1511. || MACH_OMAP_PERSEUS2
  1512. depends on LEDS
  1513. depends on !GENERIC_CLOCKEVENTS
  1514. default y if ARCH_EBSA110
  1515. help
  1516. If you say Y here, one of the system LEDs (the green one on the
  1517. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1518. will flash regularly to indicate that the system is still
  1519. operational. This is mainly useful to kernel hackers who are
  1520. debugging unstable kernels.
  1521. The LART uses the same LED for both Timer LED and CPU usage LED
  1522. functions. You may choose to use both, but the Timer LED function
  1523. will overrule the CPU usage LED.
  1524. config LEDS_CPU
  1525. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1526. !ARCH_OMAP) \
  1527. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1528. || MACH_OMAP_PERSEUS2
  1529. depends on LEDS
  1530. help
  1531. If you say Y here, the red LED will be used to give a good real
  1532. time indication of CPU usage, by lighting whenever the idle task
  1533. is not currently executing.
  1534. The LART uses the same LED for both Timer LED and CPU usage LED
  1535. functions. You may choose to use both, but the Timer LED function
  1536. will overrule the CPU usage LED.
  1537. config ALIGNMENT_TRAP
  1538. bool
  1539. depends on CPU_CP15_MMU
  1540. default y if !ARCH_EBSA110
  1541. select HAVE_PROC_CPU if PROC_FS
  1542. help
  1543. ARM processors cannot fetch/store information which is not
  1544. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1545. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1546. fetch/store instructions will be emulated in software if you say
  1547. here, which has a severe performance impact. This is necessary for
  1548. correct operation of some network protocols. With an IP-only
  1549. configuration it is safe to say N, otherwise say Y.
  1550. config UACCESS_WITH_MEMCPY
  1551. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1552. depends on MMU && EXPERIMENTAL
  1553. default y if CPU_FEROCEON
  1554. help
  1555. Implement faster copy_to_user and clear_user methods for CPU
  1556. cores where a 8-word STM instruction give significantly higher
  1557. memory write throughput than a sequence of individual 32bit stores.
  1558. A possible side effect is a slight increase in scheduling latency
  1559. between threads sharing the same address space if they invoke
  1560. such copy operations with large buffers.
  1561. However, if the CPU data cache is using a write-allocate mode,
  1562. this option is unlikely to provide any performance gain.
  1563. config SECCOMP
  1564. bool
  1565. prompt "Enable seccomp to safely compute untrusted bytecode"
  1566. ---help---
  1567. This kernel feature is useful for number crunching applications
  1568. that may need to compute untrusted bytecode during their
  1569. execution. By using pipes or other transports made available to
  1570. the process as file descriptors supporting the read/write
  1571. syscalls, it's possible to isolate those applications in
  1572. their own address space using seccomp. Once seccomp is
  1573. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1574. and the task is only allowed to execute a few safe syscalls
  1575. defined by each seccomp mode.
  1576. config CC_STACKPROTECTOR
  1577. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1578. depends on EXPERIMENTAL
  1579. help
  1580. This option turns on the -fstack-protector GCC feature. This
  1581. feature puts, at the beginning of functions, a canary value on
  1582. the stack just before the return address, and validates
  1583. the value just before actually returning. Stack based buffer
  1584. overflows (that need to overwrite this return address) now also
  1585. overwrite the canary, which gets detected and the attack is then
  1586. neutralized via a kernel panic.
  1587. This feature requires gcc version 4.2 or above.
  1588. config DEPRECATED_PARAM_STRUCT
  1589. bool "Provide old way to pass kernel parameters"
  1590. help
  1591. This was deprecated in 2001 and announced to live on for 5 years.
  1592. Some old boot loaders still use this way.
  1593. endmenu
  1594. menu "Boot options"
  1595. config USE_OF
  1596. bool "Flattened Device Tree support"
  1597. select OF
  1598. select OF_EARLY_FLATTREE
  1599. select IRQ_DOMAIN
  1600. help
  1601. Include support for flattened device tree machine descriptions.
  1602. # Compressed boot loader in ROM. Yes, we really want to ask about
  1603. # TEXT and BSS so we preserve their values in the config files.
  1604. config ZBOOT_ROM_TEXT
  1605. hex "Compressed ROM boot loader base address"
  1606. default "0"
  1607. help
  1608. The physical address at which the ROM-able zImage is to be
  1609. placed in the target. Platforms which normally make use of
  1610. ROM-able zImage formats normally set this to a suitable
  1611. value in their defconfig file.
  1612. If ZBOOT_ROM is not enabled, this has no effect.
  1613. config ZBOOT_ROM_BSS
  1614. hex "Compressed ROM boot loader BSS address"
  1615. default "0"
  1616. help
  1617. The base address of an area of read/write memory in the target
  1618. for the ROM-able zImage which must be available while the
  1619. decompressor is running. It must be large enough to hold the
  1620. entire decompressed kernel plus an additional 128 KiB.
  1621. Platforms which normally make use of ROM-able zImage formats
  1622. normally set this to a suitable value in their defconfig file.
  1623. If ZBOOT_ROM is not enabled, this has no effect.
  1624. config ZBOOT_ROM
  1625. bool "Compressed boot loader in ROM/flash"
  1626. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1627. help
  1628. Say Y here if you intend to execute your compressed kernel image
  1629. (zImage) directly from ROM or flash. If unsure, say N.
  1630. choice
  1631. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1632. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1633. default ZBOOT_ROM_NONE
  1634. help
  1635. Include experimental SD/MMC loading code in the ROM-able zImage.
  1636. With this enabled it is possible to write the ROM-able zImage
  1637. kernel image to an MMC or SD card and boot the kernel straight
  1638. from the reset vector. At reset the processor Mask ROM will load
  1639. the first part of the ROM-able zImage which in turn loads the
  1640. rest the kernel image to RAM.
  1641. config ZBOOT_ROM_NONE
  1642. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1643. help
  1644. Do not load image from SD or MMC
  1645. config ZBOOT_ROM_MMCIF
  1646. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1647. help
  1648. Load image from MMCIF hardware block.
  1649. config ZBOOT_ROM_SH_MOBILE_SDHI
  1650. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1651. help
  1652. Load image from SDHI hardware block
  1653. endchoice
  1654. config ARM_APPENDED_DTB
  1655. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1656. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1657. help
  1658. With this option, the boot code will look for a device tree binary
  1659. (DTB) appended to zImage
  1660. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1661. This is meant as a backward compatibility convenience for those
  1662. systems with a bootloader that can't be upgraded to accommodate
  1663. the documented boot protocol using a device tree.
  1664. Beware that there is very little in terms of protection against
  1665. this option being confused by leftover garbage in memory that might
  1666. look like a DTB header after a reboot if no actual DTB is appended
  1667. to zImage. Do not leave this option active in a production kernel
  1668. if you don't intend to always append a DTB. Proper passing of the
  1669. location into r2 of a bootloader provided DTB is always preferable
  1670. to this option.
  1671. config ARM_ATAG_DTB_COMPAT
  1672. bool "Supplement the appended DTB with traditional ATAG information"
  1673. depends on ARM_APPENDED_DTB
  1674. help
  1675. Some old bootloaders can't be updated to a DTB capable one, yet
  1676. they provide ATAGs with memory configuration, the ramdisk address,
  1677. the kernel cmdline string, etc. Such information is dynamically
  1678. provided by the bootloader and can't always be stored in a static
  1679. DTB. To allow a device tree enabled kernel to be used with such
  1680. bootloaders, this option allows zImage to extract the information
  1681. from the ATAG list and store it at run time into the appended DTB.
  1682. config CMDLINE
  1683. string "Default kernel command string"
  1684. default ""
  1685. help
  1686. On some architectures (EBSA110 and CATS), there is currently no way
  1687. for the boot loader to pass arguments to the kernel. For these
  1688. architectures, you should supply some command-line options at build
  1689. time by entering them here. As a minimum, you should specify the
  1690. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1691. choice
  1692. prompt "Kernel command line type" if CMDLINE != ""
  1693. default CMDLINE_FROM_BOOTLOADER
  1694. config CMDLINE_FROM_BOOTLOADER
  1695. bool "Use bootloader kernel arguments if available"
  1696. help
  1697. Uses the command-line options passed by the boot loader. If
  1698. the boot loader doesn't provide any, the default kernel command
  1699. string provided in CMDLINE will be used.
  1700. config CMDLINE_EXTEND
  1701. bool "Extend bootloader kernel arguments"
  1702. help
  1703. The command-line arguments provided by the boot loader will be
  1704. appended to the default kernel command string.
  1705. config CMDLINE_FORCE
  1706. bool "Always use the default kernel command string"
  1707. help
  1708. Always use the default kernel command string, even if the boot
  1709. loader passes other arguments to the kernel.
  1710. This is useful if you cannot or don't want to change the
  1711. command-line options your boot loader passes to the kernel.
  1712. endchoice
  1713. config XIP_KERNEL
  1714. bool "Kernel Execute-In-Place from ROM"
  1715. depends on !ZBOOT_ROM && !ARM_LPAE
  1716. help
  1717. Execute-In-Place allows the kernel to run from non-volatile storage
  1718. directly addressable by the CPU, such as NOR flash. This saves RAM
  1719. space since the text section of the kernel is not loaded from flash
  1720. to RAM. Read-write sections, such as the data section and stack,
  1721. are still copied to RAM. The XIP kernel is not compressed since
  1722. it has to run directly from flash, so it will take more space to
  1723. store it. The flash address used to link the kernel object files,
  1724. and for storing it, is configuration dependent. Therefore, if you
  1725. say Y here, you must know the proper physical address where to
  1726. store the kernel image depending on your own flash memory usage.
  1727. Also note that the make target becomes "make xipImage" rather than
  1728. "make zImage" or "make Image". The final kernel binary to put in
  1729. ROM memory will be arch/arm/boot/xipImage.
  1730. If unsure, say N.
  1731. config XIP_PHYS_ADDR
  1732. hex "XIP Kernel Physical Location"
  1733. depends on XIP_KERNEL
  1734. default "0x00080000"
  1735. help
  1736. This is the physical address in your flash memory the kernel will
  1737. be linked for and stored to. This address is dependent on your
  1738. own flash usage.
  1739. config KEXEC
  1740. bool "Kexec system call (EXPERIMENTAL)"
  1741. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1742. help
  1743. kexec is a system call that implements the ability to shutdown your
  1744. current kernel, and to start another kernel. It is like a reboot
  1745. but it is independent of the system firmware. And like a reboot
  1746. you can start any kernel with it, not just Linux.
  1747. It is an ongoing process to be certain the hardware in a machine
  1748. is properly shutdown, so do not be surprised if this code does not
  1749. initially work for you. It may help to enable device hotplugging
  1750. support.
  1751. config ATAGS_PROC
  1752. bool "Export atags in procfs"
  1753. depends on KEXEC
  1754. default y
  1755. help
  1756. Should the atags used to boot the kernel be exported in an "atags"
  1757. file in procfs. Useful with kexec.
  1758. config CRASH_DUMP
  1759. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1760. depends on EXPERIMENTAL
  1761. help
  1762. Generate crash dump after being started by kexec. This should
  1763. be normally only set in special crash dump kernels which are
  1764. loaded in the main kernel with kexec-tools into a specially
  1765. reserved region and then later executed after a crash by
  1766. kdump/kexec. The crash dump kernel must be compiled to a
  1767. memory address not used by the main kernel
  1768. For more details see Documentation/kdump/kdump.txt
  1769. config AUTO_ZRELADDR
  1770. bool "Auto calculation of the decompressed kernel image address"
  1771. depends on !ZBOOT_ROM && !ARCH_U300
  1772. help
  1773. ZRELADDR is the physical address where the decompressed kernel
  1774. image will be placed. If AUTO_ZRELADDR is selected, the address
  1775. will be determined at run-time by masking the current IP with
  1776. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1777. from start of memory.
  1778. endmenu
  1779. menu "CPU Power Management"
  1780. if ARCH_HAS_CPUFREQ
  1781. source "drivers/cpufreq/Kconfig"
  1782. config CPU_FREQ_IMX
  1783. tristate "CPUfreq driver for i.MX CPUs"
  1784. depends on ARCH_MXC && CPU_FREQ
  1785. help
  1786. This enables the CPUfreq driver for i.MX CPUs.
  1787. config CPU_FREQ_SA1100
  1788. bool
  1789. config CPU_FREQ_SA1110
  1790. bool
  1791. config CPU_FREQ_INTEGRATOR
  1792. tristate "CPUfreq driver for ARM Integrator CPUs"
  1793. depends on ARCH_INTEGRATOR && CPU_FREQ
  1794. default y
  1795. help
  1796. This enables the CPUfreq driver for ARM Integrator CPUs.
  1797. For details, take a look at <file:Documentation/cpu-freq>.
  1798. If in doubt, say Y.
  1799. config CPU_FREQ_PXA
  1800. bool
  1801. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1802. default y
  1803. select CPU_FREQ_TABLE
  1804. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1805. config CPU_FREQ_S3C
  1806. bool
  1807. help
  1808. Internal configuration node for common cpufreq on Samsung SoC
  1809. config CPU_FREQ_S3C24XX
  1810. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1811. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1812. select CPU_FREQ_S3C
  1813. help
  1814. This enables the CPUfreq driver for the Samsung S3C24XX family
  1815. of CPUs.
  1816. For details, take a look at <file:Documentation/cpu-freq>.
  1817. If in doubt, say N.
  1818. config CPU_FREQ_S3C24XX_PLL
  1819. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1820. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1821. help
  1822. Compile in support for changing the PLL frequency from the
  1823. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1824. after a frequency change, so by default it is not enabled.
  1825. This also means that the PLL tables for the selected CPU(s) will
  1826. be built which may increase the size of the kernel image.
  1827. config CPU_FREQ_S3C24XX_DEBUG
  1828. bool "Debug CPUfreq Samsung driver core"
  1829. depends on CPU_FREQ_S3C24XX
  1830. help
  1831. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1832. config CPU_FREQ_S3C24XX_IODEBUG
  1833. bool "Debug CPUfreq Samsung driver IO timing"
  1834. depends on CPU_FREQ_S3C24XX
  1835. help
  1836. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1837. config CPU_FREQ_S3C24XX_DEBUGFS
  1838. bool "Export debugfs for CPUFreq"
  1839. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1840. help
  1841. Export status information via debugfs.
  1842. endif
  1843. source "drivers/cpuidle/Kconfig"
  1844. endmenu
  1845. menu "Floating point emulation"
  1846. comment "At least one emulation must be selected"
  1847. config FPE_NWFPE
  1848. bool "NWFPE math emulation"
  1849. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1850. ---help---
  1851. Say Y to include the NWFPE floating point emulator in the kernel.
  1852. This is necessary to run most binaries. Linux does not currently
  1853. support floating point hardware so you need to say Y here even if
  1854. your machine has an FPA or floating point co-processor podule.
  1855. You may say N here if you are going to load the Acorn FPEmulator
  1856. early in the bootup.
  1857. config FPE_NWFPE_XP
  1858. bool "Support extended precision"
  1859. depends on FPE_NWFPE
  1860. help
  1861. Say Y to include 80-bit support in the kernel floating-point
  1862. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1863. Note that gcc does not generate 80-bit operations by default,
  1864. so in most cases this option only enlarges the size of the
  1865. floating point emulator without any good reason.
  1866. You almost surely want to say N here.
  1867. config FPE_FASTFPE
  1868. bool "FastFPE math emulation (EXPERIMENTAL)"
  1869. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1870. ---help---
  1871. Say Y here to include the FAST floating point emulator in the kernel.
  1872. This is an experimental much faster emulator which now also has full
  1873. precision for the mantissa. It does not support any exceptions.
  1874. It is very simple, and approximately 3-6 times faster than NWFPE.
  1875. It should be sufficient for most programs. It may be not suitable
  1876. for scientific calculations, but you have to check this for yourself.
  1877. If you do not feel you need a faster FP emulation you should better
  1878. choose NWFPE.
  1879. config VFP
  1880. bool "VFP-format floating point maths"
  1881. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1882. help
  1883. Say Y to include VFP support code in the kernel. This is needed
  1884. if your hardware includes a VFP unit.
  1885. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1886. release notes and additional status information.
  1887. Say N if your target does not have VFP hardware.
  1888. config VFPv3
  1889. bool
  1890. depends on VFP
  1891. default y if CPU_V7
  1892. config NEON
  1893. bool "Advanced SIMD (NEON) Extension support"
  1894. depends on VFPv3 && CPU_V7
  1895. help
  1896. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1897. Extension.
  1898. endmenu
  1899. menu "Userspace binary formats"
  1900. source "fs/Kconfig.binfmt"
  1901. config ARTHUR
  1902. tristate "RISC OS personality"
  1903. depends on !AEABI
  1904. help
  1905. Say Y here to include the kernel code necessary if you want to run
  1906. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1907. experimental; if this sounds frightening, say N and sleep in peace.
  1908. You can also say M here to compile this support as a module (which
  1909. will be called arthur).
  1910. endmenu
  1911. menu "Power management options"
  1912. source "kernel/power/Kconfig"
  1913. config ARCH_SUSPEND_POSSIBLE
  1914. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1915. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1916. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1917. def_bool y
  1918. config ARM_CPU_SUSPEND
  1919. def_bool PM_SLEEP
  1920. endmenu
  1921. source "net/Kconfig"
  1922. source "drivers/Kconfig"
  1923. source "fs/Kconfig"
  1924. source "arch/arm/Kconfig.debug"
  1925. source "security/Kconfig"
  1926. source "crypto/Kconfig"
  1927. source "lib/Kconfig"