Kconfig 66 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 MMU
  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 ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  15. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  16. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  17. select HAVE_ARCH_KGDB
  18. select HAVE_ARCH_TRACEHOOK
  19. select HAVE_KPROBES if !XIP_KERNEL
  20. select HAVE_KRETPROBES if (HAVE_KPROBES)
  21. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  22. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  23. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  24. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  25. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  26. select HAVE_GENERIC_DMA_COHERENT
  27. select HAVE_KERNEL_GZIP
  28. select HAVE_KERNEL_LZO
  29. select HAVE_KERNEL_LZMA
  30. select HAVE_KERNEL_XZ
  31. select HAVE_IRQ_WORK
  32. select HAVE_PERF_EVENTS
  33. select PERF_USE_VMALLOC
  34. select HAVE_REGS_AND_STACK_ACCESS_API
  35. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  36. select HAVE_C_RECORDMCOUNT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HARDIRQS_SW_RESEND
  39. select GENERIC_IRQ_PROBE
  40. select GENERIC_IRQ_SHOW
  41. select ARCH_WANT_IPC_PARSE_VERSION
  42. select HARDIRQS_SW_RESEND
  43. select CPU_PM if (SUSPEND || CPU_IDLE)
  44. select GENERIC_PCI_IOMAP
  45. select HAVE_BPF_JIT
  46. select GENERIC_SMP_IDLE_THREAD
  47. select KTIME_SCALAR
  48. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  49. select GENERIC_STRNCPY_FROM_USER
  50. select GENERIC_STRNLEN_USER
  51. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  52. help
  53. The ARM series is a line of low-power-consumption RISC chip designs
  54. licensed by ARM Ltd and targeted at embedded applications and
  55. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  56. manufactured, but legacy ARM-based PC hardware remains popular in
  57. Europe. There is an ARM Linux project with a web page at
  58. <http://www.arm.linux.org.uk/>.
  59. config ARM_HAS_SG_CHAIN
  60. bool
  61. config NEED_SG_DMA_LENGTH
  62. bool
  63. config ARM_DMA_USE_IOMMU
  64. select NEED_SG_DMA_LENGTH
  65. select ARM_HAS_SG_CHAIN
  66. bool
  67. config HAVE_PWM
  68. bool
  69. config MIGHT_HAVE_PCI
  70. bool
  71. config SYS_SUPPORTS_APM_EMULATION
  72. bool
  73. config GENERIC_GPIO
  74. bool
  75. config HAVE_TCM
  76. bool
  77. select GENERIC_ALLOCATOR
  78. config HAVE_PROC_CPU
  79. bool
  80. config NO_IOPORT
  81. bool
  82. config EISA
  83. bool
  84. ---help---
  85. The Extended Industry Standard Architecture (EISA) bus was
  86. developed as an open alternative to the IBM MicroChannel bus.
  87. The EISA bus provided some of the features of the IBM MicroChannel
  88. bus while maintaining backward compatibility with cards made for
  89. the older ISA bus. The EISA bus saw limited use between 1988 and
  90. 1995 when it was made obsolete by the PCI bus.
  91. Say Y here if you are building a kernel for an EISA-based machine.
  92. Otherwise, say N.
  93. config SBUS
  94. bool
  95. config STACKTRACE_SUPPORT
  96. bool
  97. default y
  98. config HAVE_LATENCYTOP_SUPPORT
  99. bool
  100. depends on !SMP
  101. default y
  102. config LOCKDEP_SUPPORT
  103. bool
  104. default y
  105. config TRACE_IRQFLAGS_SUPPORT
  106. bool
  107. default y
  108. config 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_SOCFPGA
  205. bool "Altera SOCFPGA family"
  206. select ARCH_WANT_OPTIONAL_GPIOLIB
  207. select ARM_AMBA
  208. select ARM_GIC
  209. select CACHE_L2X0
  210. select CLKDEV_LOOKUP
  211. select COMMON_CLK
  212. select CPU_V7
  213. select DW_APB_TIMER
  214. select DW_APB_TIMER_OF
  215. select GENERIC_CLOCKEVENTS
  216. select GPIO_PL061 if GPIOLIB
  217. select HAVE_ARM_SCU
  218. select SPARSE_IRQ
  219. select USE_OF
  220. help
  221. This enables support for Altera SOCFPGA Cyclone V platform
  222. config ARCH_INTEGRATOR
  223. bool "ARM Ltd. Integrator family"
  224. select ARM_AMBA
  225. select ARCH_HAS_CPUFREQ
  226. select COMMON_CLK
  227. select COMMON_CLK_VERSATILE
  228. select HAVE_TCM
  229. select ICST
  230. select GENERIC_CLOCKEVENTS
  231. select PLAT_VERSATILE
  232. select PLAT_VERSATILE_FPGA_IRQ
  233. select NEED_MACH_MEMORY_H
  234. select SPARSE_IRQ
  235. select MULTI_IRQ_HANDLER
  236. help
  237. Support for ARM's Integrator platform.
  238. config ARCH_REALVIEW
  239. bool "ARM Ltd. RealView family"
  240. select ARM_AMBA
  241. select COMMON_CLK
  242. select COMMON_CLK_VERSATILE
  243. select ICST
  244. select GENERIC_CLOCKEVENTS
  245. select ARCH_WANT_OPTIONAL_GPIOLIB
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLCD
  248. select ARM_TIMER_SP804
  249. select GPIO_PL061 if GPIOLIB
  250. select NEED_MACH_MEMORY_H
  251. help
  252. This enables support for ARM Ltd RealView boards.
  253. config ARCH_VERSATILE
  254. bool "ARM Ltd. Versatile family"
  255. select ARM_AMBA
  256. select ARM_VIC
  257. select CLKDEV_LOOKUP
  258. select HAVE_MACH_CLKDEV
  259. select ICST
  260. select GENERIC_CLOCKEVENTS
  261. select ARCH_WANT_OPTIONAL_GPIOLIB
  262. select PLAT_VERSATILE
  263. select PLAT_VERSATILE_CLOCK
  264. select PLAT_VERSATILE_CLCD
  265. select PLAT_VERSATILE_FPGA_IRQ
  266. select ARM_TIMER_SP804
  267. help
  268. This enables support for ARM Ltd Versatile board.
  269. config ARCH_VEXPRESS
  270. bool "ARM Ltd. Versatile Express family"
  271. select ARCH_WANT_OPTIONAL_GPIOLIB
  272. select ARM_AMBA
  273. select ARM_TIMER_SP804
  274. select CLKDEV_LOOKUP
  275. select COMMON_CLK
  276. select GENERIC_CLOCKEVENTS
  277. select HAVE_CLK
  278. select HAVE_PATA_PLATFORM
  279. select ICST
  280. select NO_IOPORT
  281. select PLAT_VERSATILE
  282. select PLAT_VERSATILE_CLCD
  283. select REGULATOR_FIXED_VOLTAGE if REGULATOR
  284. help
  285. This enables support for the ARM Ltd Versatile Express boards.
  286. config ARCH_AT91
  287. bool "Atmel AT91"
  288. select ARCH_REQUIRE_GPIOLIB
  289. select HAVE_CLK
  290. select CLKDEV_LOOKUP
  291. select IRQ_DOMAIN
  292. select NEED_MACH_IO_H if PCCARD
  293. help
  294. This enables support for systems based on Atmel
  295. AT91RM9200 and AT91SAM9* processors.
  296. config ARCH_BCM2835
  297. bool "Broadcom BCM2835 family"
  298. select ARCH_WANT_OPTIONAL_GPIOLIB
  299. select ARM_AMBA
  300. select ARM_ERRATA_411920
  301. select ARM_TIMER_SP804
  302. select CLKDEV_LOOKUP
  303. select COMMON_CLK
  304. select CPU_V6
  305. select GENERIC_CLOCKEVENTS
  306. select MULTI_IRQ_HANDLER
  307. select SPARSE_IRQ
  308. select USE_OF
  309. help
  310. This enables support for the Broadcom BCM2835 SoC. This SoC is
  311. use in the Raspberry Pi, and Roku 2 devices.
  312. config ARCH_HIGHBANK
  313. bool "Calxeda Highbank-based"
  314. select ARCH_WANT_OPTIONAL_GPIOLIB
  315. select ARM_AMBA
  316. select ARM_GIC
  317. select ARM_TIMER_SP804
  318. select CACHE_L2X0
  319. select CLKDEV_LOOKUP
  320. select COMMON_CLK
  321. select CPU_V7
  322. select GENERIC_CLOCKEVENTS
  323. select HAVE_ARM_SCU
  324. select HAVE_SMP
  325. select SPARSE_IRQ
  326. select USE_OF
  327. help
  328. Support for the Calxeda Highbank SoC based boards.
  329. config ARCH_CLPS711X
  330. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  331. select CPU_ARM720T
  332. select ARCH_USES_GETTIMEOFFSET
  333. select COMMON_CLK
  334. select CLKDEV_LOOKUP
  335. select NEED_MACH_MEMORY_H
  336. help
  337. Support for Cirrus Logic 711x/721x/731x based boards.
  338. config ARCH_CNS3XXX
  339. bool "Cavium Networks CNS3XXX family"
  340. select CPU_V6K
  341. select GENERIC_CLOCKEVENTS
  342. select ARM_GIC
  343. select MIGHT_HAVE_CACHE_L2X0
  344. select MIGHT_HAVE_PCI
  345. select PCI_DOMAINS if PCI
  346. help
  347. Support for Cavium Networks CNS3XXX platform.
  348. config ARCH_GEMINI
  349. bool "Cortina Systems Gemini"
  350. select CPU_FA526
  351. select ARCH_REQUIRE_GPIOLIB
  352. select ARCH_USES_GETTIMEOFFSET
  353. help
  354. Support for the Cortina Systems Gemini family SoCs
  355. config ARCH_SIRF
  356. bool "CSR SiRF"
  357. select NO_IOPORT
  358. select ARCH_REQUIRE_GPIOLIB
  359. select GENERIC_CLOCKEVENTS
  360. select COMMON_CLK
  361. select GENERIC_IRQ_CHIP
  362. select MIGHT_HAVE_CACHE_L2X0
  363. select PINCTRL
  364. select PINCTRL_SIRF
  365. select USE_OF
  366. help
  367. Support for CSR SiRFprimaII/Marco/Polo platforms
  368. config ARCH_EBSA110
  369. bool "EBSA-110"
  370. select CPU_SA110
  371. select ISA
  372. select NO_IOPORT
  373. select ARCH_USES_GETTIMEOFFSET
  374. select NEED_MACH_IO_H
  375. select NEED_MACH_MEMORY_H
  376. help
  377. This is an evaluation board for the StrongARM processor available
  378. from Digital. It has limited hardware on-board, including an
  379. Ethernet interface, two PCMCIA sockets, two serial ports and a
  380. parallel port.
  381. config ARCH_EP93XX
  382. bool "EP93xx-based"
  383. select CPU_ARM920T
  384. select ARM_AMBA
  385. select ARM_VIC
  386. select CLKDEV_LOOKUP
  387. select ARCH_REQUIRE_GPIOLIB
  388. select ARCH_HAS_HOLES_MEMORYMODEL
  389. select ARCH_USES_GETTIMEOFFSET
  390. select NEED_MACH_MEMORY_H
  391. help
  392. This enables support for the Cirrus EP93xx series of CPUs.
  393. config ARCH_FOOTBRIDGE
  394. bool "FootBridge"
  395. select CPU_SA110
  396. select FOOTBRIDGE
  397. select GENERIC_CLOCKEVENTS
  398. select HAVE_IDE
  399. select NEED_MACH_IO_H if !MMU
  400. select NEED_MACH_MEMORY_H
  401. help
  402. Support for systems based on the DC21285 companion chip
  403. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  404. config ARCH_MXC
  405. bool "Freescale MXC/iMX-based"
  406. select GENERIC_CLOCKEVENTS
  407. select ARCH_REQUIRE_GPIOLIB
  408. select CLKDEV_LOOKUP
  409. select CLKSRC_MMIO
  410. select GENERIC_IRQ_CHIP
  411. select MULTI_IRQ_HANDLER
  412. select SPARSE_IRQ
  413. select USE_OF
  414. help
  415. Support for Freescale MXC/iMX-based family of processors
  416. config ARCH_MXS
  417. bool "Freescale MXS-based"
  418. select GENERIC_CLOCKEVENTS
  419. select ARCH_REQUIRE_GPIOLIB
  420. select CLKDEV_LOOKUP
  421. select CLKSRC_MMIO
  422. select COMMON_CLK
  423. select HAVE_CLK_PREPARE
  424. select PINCTRL
  425. select USE_OF
  426. help
  427. Support for Freescale MXS-based family of processors
  428. config ARCH_NETX
  429. bool "Hilscher NetX based"
  430. select CLKSRC_MMIO
  431. select CPU_ARM926T
  432. select ARM_VIC
  433. select GENERIC_CLOCKEVENTS
  434. help
  435. This enables support for systems based on the Hilscher NetX Soc
  436. config ARCH_H720X
  437. bool "Hynix HMS720x-based"
  438. select CPU_ARM720T
  439. select ISA_DMA_API
  440. select ARCH_USES_GETTIMEOFFSET
  441. help
  442. This enables support for systems based on the Hynix HMS720x
  443. config ARCH_IOP13XX
  444. bool "IOP13xx-based"
  445. depends on MMU
  446. select CPU_XSC3
  447. select PLAT_IOP
  448. select PCI
  449. select ARCH_SUPPORTS_MSI
  450. select VMSPLIT_1G
  451. select NEED_MACH_MEMORY_H
  452. select NEED_RET_TO_USER
  453. help
  454. Support for Intel's IOP13XX (XScale) family of processors.
  455. config ARCH_IOP32X
  456. bool "IOP32x-based"
  457. depends on MMU
  458. select CPU_XSCALE
  459. select NEED_RET_TO_USER
  460. select PLAT_IOP
  461. select PCI
  462. select ARCH_REQUIRE_GPIOLIB
  463. help
  464. Support for Intel's 80219 and IOP32X (XScale) family of
  465. processors.
  466. config ARCH_IOP33X
  467. bool "IOP33x-based"
  468. depends on MMU
  469. select CPU_XSCALE
  470. select NEED_RET_TO_USER
  471. select PLAT_IOP
  472. select PCI
  473. select ARCH_REQUIRE_GPIOLIB
  474. help
  475. Support for Intel's IOP33X (XScale) family of processors.
  476. config ARCH_IXP4XX
  477. bool "IXP4xx-based"
  478. depends on MMU
  479. select ARCH_HAS_DMA_SET_COHERENT_MASK
  480. select CLKSRC_MMIO
  481. select CPU_XSCALE
  482. select ARCH_REQUIRE_GPIOLIB
  483. select GENERIC_CLOCKEVENTS
  484. select MIGHT_HAVE_PCI
  485. select NEED_MACH_IO_H
  486. select DMABOUNCE if PCI
  487. help
  488. Support for Intel's IXP4XX (XScale) family of processors.
  489. config ARCH_MVEBU
  490. bool "Marvell SOCs with Device Tree support"
  491. select GENERIC_CLOCKEVENTS
  492. select MULTI_IRQ_HANDLER
  493. select SPARSE_IRQ
  494. select CLKSRC_MMIO
  495. select GENERIC_IRQ_CHIP
  496. select IRQ_DOMAIN
  497. select COMMON_CLK
  498. help
  499. Support for the Marvell SoC Family with device tree support
  500. config ARCH_DOVE
  501. bool "Marvell Dove"
  502. select CPU_V7
  503. select PCI
  504. select ARCH_REQUIRE_GPIOLIB
  505. select GENERIC_CLOCKEVENTS
  506. select PLAT_ORION
  507. help
  508. Support for the Marvell Dove SoC 88AP510
  509. config ARCH_KIRKWOOD
  510. bool "Marvell Kirkwood"
  511. select CPU_FEROCEON
  512. select PCI
  513. select ARCH_REQUIRE_GPIOLIB
  514. select GENERIC_CLOCKEVENTS
  515. select PLAT_ORION
  516. help
  517. Support for the following Marvell Kirkwood series SoCs:
  518. 88F6180, 88F6192 and 88F6281.
  519. config ARCH_LPC32XX
  520. bool "NXP LPC32XX"
  521. select CLKSRC_MMIO
  522. select CPU_ARM926T
  523. select ARCH_REQUIRE_GPIOLIB
  524. select HAVE_IDE
  525. select ARM_AMBA
  526. select USB_ARCH_HAS_OHCI
  527. select CLKDEV_LOOKUP
  528. select GENERIC_CLOCKEVENTS
  529. select USE_OF
  530. select HAVE_PWM
  531. help
  532. Support for the NXP LPC32XX family of processors
  533. config ARCH_MV78XX0
  534. bool "Marvell MV78xx0"
  535. select CPU_FEROCEON
  536. select PCI
  537. select ARCH_REQUIRE_GPIOLIB
  538. select GENERIC_CLOCKEVENTS
  539. select PLAT_ORION
  540. help
  541. Support for the following Marvell MV78xx0 series SoCs:
  542. MV781x0, MV782x0.
  543. config ARCH_ORION5X
  544. bool "Marvell Orion"
  545. depends on MMU
  546. select CPU_FEROCEON
  547. select PCI
  548. select ARCH_REQUIRE_GPIOLIB
  549. select GENERIC_CLOCKEVENTS
  550. select PLAT_ORION
  551. help
  552. Support for the following Marvell Orion 5x series SoCs:
  553. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  554. Orion-2 (5281), Orion-1-90 (6183).
  555. config ARCH_MMP
  556. bool "Marvell PXA168/910/MMP2"
  557. depends on MMU
  558. select ARCH_REQUIRE_GPIOLIB
  559. select CLKDEV_LOOKUP
  560. select GENERIC_CLOCKEVENTS
  561. select GPIO_PXA
  562. select IRQ_DOMAIN
  563. select PLAT_PXA
  564. select SPARSE_IRQ
  565. select GENERIC_ALLOCATOR
  566. help
  567. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  568. config ARCH_KS8695
  569. bool "Micrel/Kendin KS8695"
  570. select CPU_ARM922T
  571. select ARCH_REQUIRE_GPIOLIB
  572. select NEED_MACH_MEMORY_H
  573. select CLKSRC_MMIO
  574. select GENERIC_CLOCKEVENTS
  575. help
  576. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  577. System-on-Chip devices.
  578. config ARCH_W90X900
  579. bool "Nuvoton W90X900 CPU"
  580. select CPU_ARM926T
  581. select ARCH_REQUIRE_GPIOLIB
  582. select CLKDEV_LOOKUP
  583. select CLKSRC_MMIO
  584. select GENERIC_CLOCKEVENTS
  585. help
  586. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  587. At present, the w90x900 has been renamed nuc900, regarding
  588. the ARM series product line, you can login the following
  589. link address to know more.
  590. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  591. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  592. config ARCH_TEGRA
  593. bool "NVIDIA Tegra"
  594. select CLKDEV_LOOKUP
  595. select CLKSRC_MMIO
  596. select GENERIC_CLOCKEVENTS
  597. select GENERIC_GPIO
  598. select HAVE_CLK
  599. select HAVE_SMP
  600. select MIGHT_HAVE_CACHE_L2X0
  601. select ARCH_HAS_CPUFREQ
  602. select USE_OF
  603. select COMMON_CLK
  604. help
  605. This enables support for NVIDIA Tegra based systems (Tegra APX,
  606. Tegra 6xx and Tegra 2 series).
  607. config ARCH_PICOXCELL
  608. bool "Picochip picoXcell"
  609. select ARCH_REQUIRE_GPIOLIB
  610. select ARM_PATCH_PHYS_VIRT
  611. select ARM_VIC
  612. select CPU_V6K
  613. select DW_APB_TIMER
  614. select DW_APB_TIMER_OF
  615. select GENERIC_CLOCKEVENTS
  616. select GENERIC_GPIO
  617. select HAVE_TCM
  618. select NO_IOPORT
  619. select SPARSE_IRQ
  620. select USE_OF
  621. help
  622. This enables support for systems based on the Picochip picoXcell
  623. family of Femtocell devices. The picoxcell support requires device tree
  624. for all boards.
  625. config ARCH_PXA
  626. bool "PXA2xx/PXA3xx-based"
  627. depends on MMU
  628. select ARCH_MTD_XIP
  629. select ARCH_HAS_CPUFREQ
  630. select CLKDEV_LOOKUP
  631. select CLKSRC_MMIO
  632. select ARCH_REQUIRE_GPIOLIB
  633. select GENERIC_CLOCKEVENTS
  634. select GPIO_PXA
  635. select PLAT_PXA
  636. select SPARSE_IRQ
  637. select AUTO_ZRELADDR
  638. select MULTI_IRQ_HANDLER
  639. select ARM_CPU_SUSPEND if PM
  640. select HAVE_IDE
  641. help
  642. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  643. config ARCH_MSM
  644. bool "Qualcomm MSM"
  645. select HAVE_CLK
  646. select GENERIC_CLOCKEVENTS
  647. select ARCH_REQUIRE_GPIOLIB
  648. select CLKDEV_LOOKUP
  649. help
  650. Support for Qualcomm MSM/QSD based systems. This runs on the
  651. apps processor of the MSM/QSD and depends on a shared memory
  652. interface to the modem processor which runs the baseband
  653. stack and controls some vital subsystems
  654. (clock and power control, etc).
  655. config ARCH_SHMOBILE
  656. bool "Renesas SH-Mobile / R-Mobile"
  657. select HAVE_CLK
  658. select CLKDEV_LOOKUP
  659. select HAVE_MACH_CLKDEV
  660. select HAVE_SMP
  661. select GENERIC_CLOCKEVENTS
  662. select MIGHT_HAVE_CACHE_L2X0
  663. select NO_IOPORT
  664. select SPARSE_IRQ
  665. select MULTI_IRQ_HANDLER
  666. select PM_GENERIC_DOMAINS if PM
  667. select NEED_MACH_MEMORY_H
  668. help
  669. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  670. config ARCH_RPC
  671. bool "RiscPC"
  672. select ARCH_ACORN
  673. select FIQ
  674. select ARCH_MAY_HAVE_PC_FDC
  675. select HAVE_PATA_PLATFORM
  676. select ISA_DMA_API
  677. select NO_IOPORT
  678. select ARCH_SPARSEMEM_ENABLE
  679. select ARCH_USES_GETTIMEOFFSET
  680. select HAVE_IDE
  681. select NEED_MACH_IO_H
  682. select NEED_MACH_MEMORY_H
  683. help
  684. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  685. CD-ROM interface, serial and parallel port, and the floppy drive.
  686. config ARCH_SA1100
  687. bool "SA1100-based"
  688. select CLKSRC_MMIO
  689. select CPU_SA1100
  690. select ISA
  691. select ARCH_SPARSEMEM_ENABLE
  692. select ARCH_MTD_XIP
  693. select ARCH_HAS_CPUFREQ
  694. select CPU_FREQ
  695. select GENERIC_CLOCKEVENTS
  696. select CLKDEV_LOOKUP
  697. select ARCH_REQUIRE_GPIOLIB
  698. select HAVE_IDE
  699. select NEED_MACH_MEMORY_H
  700. select SPARSE_IRQ
  701. help
  702. Support for StrongARM 11x0 based boards.
  703. config ARCH_S3C24XX
  704. bool "Samsung S3C24XX SoCs"
  705. select GENERIC_GPIO
  706. select ARCH_HAS_CPUFREQ
  707. select HAVE_CLK
  708. select CLKDEV_LOOKUP
  709. select ARCH_USES_GETTIMEOFFSET
  710. select HAVE_S3C2410_I2C if I2C
  711. select HAVE_S3C_RTC if RTC_CLASS
  712. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  713. select NEED_MACH_IO_H
  714. help
  715. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  716. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  717. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  718. Samsung SMDK2410 development board (and derivatives).
  719. config ARCH_S3C64XX
  720. bool "Samsung S3C64XX"
  721. select PLAT_SAMSUNG
  722. select CPU_V6
  723. select ARM_VIC
  724. select HAVE_CLK
  725. select HAVE_TCM
  726. select CLKDEV_LOOKUP
  727. select NO_IOPORT
  728. select ARCH_USES_GETTIMEOFFSET
  729. select ARCH_HAS_CPUFREQ
  730. select ARCH_REQUIRE_GPIOLIB
  731. select SAMSUNG_CLKSRC
  732. select SAMSUNG_IRQ_VIC_TIMER
  733. select S3C_GPIO_TRACK
  734. select S3C_DEV_NAND
  735. select USB_ARCH_HAS_OHCI
  736. select SAMSUNG_GPIOLIB_4BIT
  737. select HAVE_S3C2410_I2C if I2C
  738. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  739. help
  740. Samsung S3C64XX series based systems
  741. config ARCH_S5P64X0
  742. bool "Samsung S5P6440 S5P6450"
  743. select CPU_V6
  744. select GENERIC_GPIO
  745. select HAVE_CLK
  746. select CLKDEV_LOOKUP
  747. select CLKSRC_MMIO
  748. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  749. select GENERIC_CLOCKEVENTS
  750. select HAVE_S3C2410_I2C if I2C
  751. select HAVE_S3C_RTC if RTC_CLASS
  752. help
  753. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  754. SMDK6450.
  755. config ARCH_S5PC100
  756. bool "Samsung S5PC100"
  757. select GENERIC_GPIO
  758. select HAVE_CLK
  759. select CLKDEV_LOOKUP
  760. select CPU_V7
  761. select ARCH_USES_GETTIMEOFFSET
  762. select HAVE_S3C2410_I2C if I2C
  763. select HAVE_S3C_RTC if RTC_CLASS
  764. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  765. help
  766. Samsung S5PC100 series based systems
  767. config ARCH_S5PV210
  768. bool "Samsung S5PV210/S5PC110"
  769. select CPU_V7
  770. select ARCH_SPARSEMEM_ENABLE
  771. select ARCH_HAS_HOLES_MEMORYMODEL
  772. select GENERIC_GPIO
  773. select HAVE_CLK
  774. select CLKDEV_LOOKUP
  775. select CLKSRC_MMIO
  776. select ARCH_HAS_CPUFREQ
  777. select GENERIC_CLOCKEVENTS
  778. select HAVE_S3C2410_I2C if I2C
  779. select HAVE_S3C_RTC if RTC_CLASS
  780. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  781. select NEED_MACH_MEMORY_H
  782. help
  783. Samsung S5PV210/S5PC110 series based systems
  784. config ARCH_EXYNOS
  785. bool "SAMSUNG EXYNOS"
  786. select CPU_V7
  787. select ARCH_SPARSEMEM_ENABLE
  788. select ARCH_HAS_HOLES_MEMORYMODEL
  789. select GENERIC_GPIO
  790. select HAVE_CLK
  791. select CLKDEV_LOOKUP
  792. select ARCH_HAS_CPUFREQ
  793. select GENERIC_CLOCKEVENTS
  794. select HAVE_S3C_RTC if RTC_CLASS
  795. select HAVE_S3C2410_I2C if I2C
  796. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  797. select NEED_MACH_MEMORY_H
  798. help
  799. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  800. config ARCH_SHARK
  801. bool "Shark"
  802. select CPU_SA110
  803. select ISA
  804. select ISA_DMA
  805. select ZONE_DMA
  806. select PCI
  807. select ARCH_USES_GETTIMEOFFSET
  808. select NEED_MACH_MEMORY_H
  809. help
  810. Support for the StrongARM based Digital DNARD machine, also known
  811. as "Shark" (<http://www.shark-linux.de/shark.html>).
  812. config ARCH_U300
  813. bool "ST-Ericsson U300 Series"
  814. depends on MMU
  815. select CLKSRC_MMIO
  816. select CPU_ARM926T
  817. select HAVE_TCM
  818. select ARM_AMBA
  819. select ARM_PATCH_PHYS_VIRT
  820. select ARM_VIC
  821. select GENERIC_CLOCKEVENTS
  822. select CLKDEV_LOOKUP
  823. select COMMON_CLK
  824. select GENERIC_GPIO
  825. select ARCH_REQUIRE_GPIOLIB
  826. select SPARSE_IRQ
  827. help
  828. Support for ST-Ericsson U300 series mobile platforms.
  829. config ARCH_U8500
  830. bool "ST-Ericsson U8500 Series"
  831. depends on MMU
  832. select CPU_V7
  833. select ARM_AMBA
  834. select GENERIC_CLOCKEVENTS
  835. select CLKDEV_LOOKUP
  836. select ARCH_REQUIRE_GPIOLIB
  837. select ARCH_HAS_CPUFREQ
  838. select HAVE_SMP
  839. select MIGHT_HAVE_CACHE_L2X0
  840. help
  841. Support for ST-Ericsson's Ux500 architecture
  842. config ARCH_NOMADIK
  843. bool "STMicroelectronics Nomadik"
  844. select ARM_AMBA
  845. select ARM_VIC
  846. select CPU_ARM926T
  847. select COMMON_CLK
  848. select GENERIC_CLOCKEVENTS
  849. select PINCTRL
  850. select MIGHT_HAVE_CACHE_L2X0
  851. select ARCH_REQUIRE_GPIOLIB
  852. help
  853. Support for the Nomadik platform by ST-Ericsson
  854. config ARCH_DAVINCI
  855. bool "TI DaVinci"
  856. select GENERIC_CLOCKEVENTS
  857. select ARCH_REQUIRE_GPIOLIB
  858. select ZONE_DMA
  859. select HAVE_IDE
  860. select CLKDEV_LOOKUP
  861. select GENERIC_ALLOCATOR
  862. select GENERIC_IRQ_CHIP
  863. select ARCH_HAS_HOLES_MEMORYMODEL
  864. help
  865. Support for TI's DaVinci platform.
  866. config ARCH_OMAP
  867. bool "TI OMAP"
  868. depends on MMU
  869. select HAVE_CLK
  870. select ARCH_REQUIRE_GPIOLIB
  871. select ARCH_HAS_CPUFREQ
  872. select CLKSRC_MMIO
  873. select GENERIC_CLOCKEVENTS
  874. select ARCH_HAS_HOLES_MEMORYMODEL
  875. help
  876. Support for TI's OMAP platform (OMAP1/2/3/4).
  877. config PLAT_SPEAR
  878. bool "ST SPEAr"
  879. select ARM_AMBA
  880. select ARCH_REQUIRE_GPIOLIB
  881. select CLKDEV_LOOKUP
  882. select COMMON_CLK
  883. select CLKSRC_MMIO
  884. select GENERIC_CLOCKEVENTS
  885. select HAVE_CLK
  886. help
  887. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  888. config ARCH_VT8500
  889. bool "VIA/WonderMedia 85xx"
  890. select CPU_ARM926T
  891. select GENERIC_GPIO
  892. select ARCH_HAS_CPUFREQ
  893. select GENERIC_CLOCKEVENTS
  894. select ARCH_REQUIRE_GPIOLIB
  895. select USE_OF
  896. select COMMON_CLK
  897. select HAVE_CLK
  898. select CLKDEV_LOOKUP
  899. help
  900. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  901. config ARCH_ZYNQ
  902. bool "Xilinx Zynq ARM Cortex A9 Platform"
  903. select CPU_V7
  904. select GENERIC_CLOCKEVENTS
  905. select CLKDEV_LOOKUP
  906. select ARM_GIC
  907. select ARM_AMBA
  908. select ICST
  909. select MIGHT_HAVE_CACHE_L2X0
  910. select USE_OF
  911. help
  912. Support for Xilinx Zynq ARM Cortex A9 Platform
  913. endchoice
  914. #
  915. # This is sorted alphabetically by mach-* pathname. However, plat-*
  916. # Kconfigs may be included either alphabetically (according to the
  917. # plat- suffix) or along side the corresponding mach-* source.
  918. #
  919. source "arch/arm/mach-mvebu/Kconfig"
  920. source "arch/arm/mach-at91/Kconfig"
  921. source "arch/arm/mach-clps711x/Kconfig"
  922. source "arch/arm/mach-cns3xxx/Kconfig"
  923. source "arch/arm/mach-davinci/Kconfig"
  924. source "arch/arm/mach-dove/Kconfig"
  925. source "arch/arm/mach-ep93xx/Kconfig"
  926. source "arch/arm/mach-footbridge/Kconfig"
  927. source "arch/arm/mach-gemini/Kconfig"
  928. source "arch/arm/mach-h720x/Kconfig"
  929. source "arch/arm/mach-integrator/Kconfig"
  930. source "arch/arm/mach-iop32x/Kconfig"
  931. source "arch/arm/mach-iop33x/Kconfig"
  932. source "arch/arm/mach-iop13xx/Kconfig"
  933. source "arch/arm/mach-ixp4xx/Kconfig"
  934. source "arch/arm/mach-kirkwood/Kconfig"
  935. source "arch/arm/mach-ks8695/Kconfig"
  936. source "arch/arm/mach-msm/Kconfig"
  937. source "arch/arm/mach-mv78xx0/Kconfig"
  938. source "arch/arm/plat-mxc/Kconfig"
  939. source "arch/arm/mach-mxs/Kconfig"
  940. source "arch/arm/mach-netx/Kconfig"
  941. source "arch/arm/mach-nomadik/Kconfig"
  942. source "arch/arm/plat-nomadik/Kconfig"
  943. source "arch/arm/plat-omap/Kconfig"
  944. source "arch/arm/mach-omap1/Kconfig"
  945. source "arch/arm/mach-omap2/Kconfig"
  946. source "arch/arm/mach-orion5x/Kconfig"
  947. source "arch/arm/mach-pxa/Kconfig"
  948. source "arch/arm/plat-pxa/Kconfig"
  949. source "arch/arm/mach-mmp/Kconfig"
  950. source "arch/arm/mach-realview/Kconfig"
  951. source "arch/arm/mach-sa1100/Kconfig"
  952. source "arch/arm/plat-samsung/Kconfig"
  953. source "arch/arm/plat-s3c24xx/Kconfig"
  954. source "arch/arm/plat-spear/Kconfig"
  955. source "arch/arm/mach-s3c24xx/Kconfig"
  956. if ARCH_S3C24XX
  957. source "arch/arm/mach-s3c2412/Kconfig"
  958. source "arch/arm/mach-s3c2440/Kconfig"
  959. endif
  960. if ARCH_S3C64XX
  961. source "arch/arm/mach-s3c64xx/Kconfig"
  962. endif
  963. source "arch/arm/mach-s5p64x0/Kconfig"
  964. source "arch/arm/mach-s5pc100/Kconfig"
  965. source "arch/arm/mach-s5pv210/Kconfig"
  966. source "arch/arm/mach-exynos/Kconfig"
  967. source "arch/arm/mach-shmobile/Kconfig"
  968. source "arch/arm/mach-prima2/Kconfig"
  969. source "arch/arm/mach-tegra/Kconfig"
  970. source "arch/arm/mach-u300/Kconfig"
  971. source "arch/arm/mach-ux500/Kconfig"
  972. source "arch/arm/mach-versatile/Kconfig"
  973. source "arch/arm/mach-vexpress/Kconfig"
  974. source "arch/arm/plat-versatile/Kconfig"
  975. source "arch/arm/mach-w90x900/Kconfig"
  976. # Definitions to make life easier
  977. config ARCH_ACORN
  978. bool
  979. config PLAT_IOP
  980. bool
  981. select GENERIC_CLOCKEVENTS
  982. config PLAT_ORION
  983. bool
  984. select CLKSRC_MMIO
  985. select GENERIC_IRQ_CHIP
  986. select IRQ_DOMAIN
  987. select COMMON_CLK
  988. config PLAT_PXA
  989. bool
  990. config PLAT_VERSATILE
  991. bool
  992. config ARM_TIMER_SP804
  993. bool
  994. select CLKSRC_MMIO
  995. select HAVE_SCHED_CLOCK
  996. source arch/arm/mm/Kconfig
  997. config ARM_NR_BANKS
  998. int
  999. default 16 if ARCH_EP93XX
  1000. default 8
  1001. config IWMMXT
  1002. bool "Enable iWMMXt support"
  1003. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1004. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1005. help
  1006. Enable support for iWMMXt context switching at run time if
  1007. running on a CPU that supports it.
  1008. config XSCALE_PMU
  1009. bool
  1010. depends on CPU_XSCALE
  1011. default y
  1012. config MULTI_IRQ_HANDLER
  1013. bool
  1014. help
  1015. Allow each machine to specify it's own IRQ handler at run time.
  1016. if !MMU
  1017. source "arch/arm/Kconfig-nommu"
  1018. endif
  1019. config ARM_ERRATA_326103
  1020. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1021. depends on CPU_V6
  1022. help
  1023. Executing a SWP instruction to read-only memory does not set bit 11
  1024. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1025. treat the access as a read, preventing a COW from occurring and
  1026. causing the faulting task to livelock.
  1027. config ARM_ERRATA_411920
  1028. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1029. depends on CPU_V6 || CPU_V6K
  1030. help
  1031. Invalidation of the Instruction Cache operation can
  1032. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1033. It does not affect the MPCore. This option enables the ARM Ltd.
  1034. recommended workaround.
  1035. config ARM_ERRATA_430973
  1036. bool "ARM errata: Stale prediction on replaced interworking branch"
  1037. depends on CPU_V7
  1038. help
  1039. This option enables the workaround for the 430973 Cortex-A8
  1040. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1041. interworking branch is replaced with another code sequence at the
  1042. same virtual address, whether due to self-modifying code or virtual
  1043. to physical address re-mapping, Cortex-A8 does not recover from the
  1044. stale interworking branch prediction. This results in Cortex-A8
  1045. executing the new code sequence in the incorrect ARM or Thumb state.
  1046. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1047. and also flushes the branch target cache at every context switch.
  1048. Note that setting specific bits in the ACTLR register may not be
  1049. available in non-secure mode.
  1050. config ARM_ERRATA_458693
  1051. bool "ARM errata: Processor deadlock when a false hazard is created"
  1052. depends on CPU_V7
  1053. help
  1054. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1055. erratum. For very specific sequences of memory operations, it is
  1056. possible for a hazard condition intended for a cache line to instead
  1057. be incorrectly associated with a different cache line. This false
  1058. hazard might then cause a processor deadlock. The workaround enables
  1059. the L1 caching of the NEON accesses and disables the PLD instruction
  1060. in the ACTLR register. Note that setting specific bits in the ACTLR
  1061. register may not be available in non-secure mode.
  1062. config ARM_ERRATA_460075
  1063. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1064. depends on CPU_V7
  1065. help
  1066. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1067. erratum. Any asynchronous access to the L2 cache may encounter a
  1068. situation in which recent store transactions to the L2 cache are lost
  1069. and overwritten with stale memory contents from external memory. The
  1070. workaround disables the write-allocate mode for the L2 cache via the
  1071. ACTLR register. Note that setting specific bits in the ACTLR register
  1072. may not be available in non-secure mode.
  1073. config ARM_ERRATA_742230
  1074. bool "ARM errata: DMB operation may be faulty"
  1075. depends on CPU_V7 && SMP
  1076. help
  1077. This option enables the workaround for the 742230 Cortex-A9
  1078. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1079. between two write operations may not ensure the correct visibility
  1080. ordering of the two writes. This workaround sets a specific bit in
  1081. the diagnostic register of the Cortex-A9 which causes the DMB
  1082. instruction to behave as a DSB, ensuring the correct behaviour of
  1083. the two writes.
  1084. config ARM_ERRATA_742231
  1085. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1086. depends on CPU_V7 && SMP
  1087. help
  1088. This option enables the workaround for the 742231 Cortex-A9
  1089. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1090. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1091. accessing some data located in the same cache line, may get corrupted
  1092. data due to bad handling of the address hazard when the line gets
  1093. replaced from one of the CPUs at the same time as another CPU is
  1094. accessing it. This workaround sets specific bits in the diagnostic
  1095. register of the Cortex-A9 which reduces the linefill issuing
  1096. capabilities of the processor.
  1097. config PL310_ERRATA_588369
  1098. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1099. depends on CACHE_L2X0
  1100. help
  1101. The PL310 L2 cache controller implements three types of Clean &
  1102. Invalidate maintenance operations: by Physical Address
  1103. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1104. They are architecturally defined to behave as the execution of a
  1105. clean operation followed immediately by an invalidate operation,
  1106. both performing to the same memory location. This functionality
  1107. is not correctly implemented in PL310 as clean lines are not
  1108. invalidated as a result of these operations.
  1109. config ARM_ERRATA_720789
  1110. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1111. depends on CPU_V7
  1112. help
  1113. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1114. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1115. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1116. As a consequence of this erratum, some TLB entries which should be
  1117. invalidated are not, resulting in an incoherency in the system page
  1118. tables. The workaround changes the TLB flushing routines to invalidate
  1119. entries regardless of the ASID.
  1120. config PL310_ERRATA_727915
  1121. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1122. depends on CACHE_L2X0
  1123. help
  1124. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1125. operation (offset 0x7FC). This operation runs in background so that
  1126. PL310 can handle normal accesses while it is in progress. Under very
  1127. rare circumstances, due to this erratum, write data can be lost when
  1128. PL310 treats a cacheable write transaction during a Clean &
  1129. Invalidate by Way operation.
  1130. config ARM_ERRATA_743622
  1131. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1132. depends on CPU_V7
  1133. help
  1134. This option enables the workaround for the 743622 Cortex-A9
  1135. (r2p*) erratum. Under very rare conditions, a faulty
  1136. optimisation in the Cortex-A9 Store Buffer may lead to data
  1137. corruption. This workaround sets a specific bit in the diagnostic
  1138. register of the Cortex-A9 which disables the Store Buffer
  1139. optimisation, preventing the defect from occurring. This has no
  1140. visible impact on the overall performance or power consumption of the
  1141. processor.
  1142. config ARM_ERRATA_751472
  1143. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1144. depends on CPU_V7
  1145. help
  1146. This option enables the workaround for the 751472 Cortex-A9 (prior
  1147. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1148. completion of a following broadcasted operation if the second
  1149. operation is received by a CPU before the ICIALLUIS has completed,
  1150. potentially leading to corrupted entries in the cache or TLB.
  1151. config PL310_ERRATA_753970
  1152. bool "PL310 errata: cache sync operation may be faulty"
  1153. depends on CACHE_PL310
  1154. help
  1155. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1156. Under some condition the effect of cache sync operation on
  1157. the store buffer still remains when the operation completes.
  1158. This means that the store buffer is always asked to drain and
  1159. this prevents it from merging any further writes. The workaround
  1160. is to replace the normal offset of cache sync operation (0x730)
  1161. by another offset targeting an unmapped PL310 register 0x740.
  1162. This has the same effect as the cache sync operation: store buffer
  1163. drain and waiting for all buffers empty.
  1164. config ARM_ERRATA_754322
  1165. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1166. depends on CPU_V7
  1167. help
  1168. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1169. r3p*) erratum. A speculative memory access may cause a page table walk
  1170. which starts prior to an ASID switch but completes afterwards. This
  1171. can populate the micro-TLB with a stale entry which may be hit with
  1172. the new ASID. This workaround places two dsb instructions in the mm
  1173. switching code so that no page table walks can cross the ASID switch.
  1174. config ARM_ERRATA_754327
  1175. bool "ARM errata: no automatic Store Buffer drain"
  1176. depends on CPU_V7 && SMP
  1177. help
  1178. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1179. r2p0) erratum. The Store Buffer does not have any automatic draining
  1180. mechanism and therefore a livelock may occur if an external agent
  1181. continuously polls a memory location waiting to observe an update.
  1182. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1183. written polling loops from denying visibility of updates to memory.
  1184. config ARM_ERRATA_364296
  1185. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1186. depends on CPU_V6 && !SMP
  1187. help
  1188. This options enables the workaround for the 364296 ARM1136
  1189. r0p2 erratum (possible cache data corruption with
  1190. hit-under-miss enabled). It sets the undocumented bit 31 in
  1191. the auxiliary control register and the FI bit in the control
  1192. register, thus disabling hit-under-miss without putting the
  1193. processor into full low interrupt latency mode. ARM11MPCore
  1194. is not affected.
  1195. config ARM_ERRATA_764369
  1196. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1197. depends on CPU_V7 && SMP
  1198. help
  1199. This option enables the workaround for erratum 764369
  1200. affecting Cortex-A9 MPCore with two or more processors (all
  1201. current revisions). Under certain timing circumstances, a data
  1202. cache line maintenance operation by MVA targeting an Inner
  1203. Shareable memory region may fail to proceed up to either the
  1204. Point of Coherency or to the Point of Unification of the
  1205. system. This workaround adds a DSB instruction before the
  1206. relevant cache maintenance functions and sets a specific bit
  1207. in the diagnostic control register of the SCU.
  1208. config PL310_ERRATA_769419
  1209. bool "PL310 errata: no automatic Store Buffer drain"
  1210. depends on CACHE_L2X0
  1211. help
  1212. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1213. not automatically drain. This can cause normal, non-cacheable
  1214. writes to be retained when the memory system is idle, leading
  1215. to suboptimal I/O performance for drivers using coherent DMA.
  1216. This option adds a write barrier to the cpu_idle loop so that,
  1217. on systems with an outer cache, the store buffer is drained
  1218. explicitly.
  1219. endmenu
  1220. source "arch/arm/common/Kconfig"
  1221. menu "Bus support"
  1222. config ARM_AMBA
  1223. bool
  1224. config ISA
  1225. bool
  1226. help
  1227. Find out whether you have ISA slots on your motherboard. ISA is the
  1228. name of a bus system, i.e. the way the CPU talks to the other stuff
  1229. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1230. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1231. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1232. # Select ISA DMA controller support
  1233. config ISA_DMA
  1234. bool
  1235. select ISA_DMA_API
  1236. # Select ISA DMA interface
  1237. config ISA_DMA_API
  1238. bool
  1239. config PCI
  1240. bool "PCI support" if MIGHT_HAVE_PCI
  1241. help
  1242. Find out whether you have a PCI motherboard. PCI is the name of a
  1243. bus system, i.e. the way the CPU talks to the other stuff inside
  1244. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1245. VESA. If you have PCI, say Y, otherwise N.
  1246. config PCI_DOMAINS
  1247. bool
  1248. depends on PCI
  1249. config PCI_NANOENGINE
  1250. bool "BSE nanoEngine PCI support"
  1251. depends on SA1100_NANOENGINE
  1252. help
  1253. Enable PCI on the BSE nanoEngine board.
  1254. config PCI_SYSCALL
  1255. def_bool PCI
  1256. # Select the host bridge type
  1257. config PCI_HOST_VIA82C505
  1258. bool
  1259. depends on PCI && ARCH_SHARK
  1260. default y
  1261. config PCI_HOST_ITE8152
  1262. bool
  1263. depends on PCI && MACH_ARMCORE
  1264. default y
  1265. select DMABOUNCE
  1266. source "drivers/pci/Kconfig"
  1267. source "drivers/pcmcia/Kconfig"
  1268. endmenu
  1269. menu "Kernel Features"
  1270. config HAVE_SMP
  1271. bool
  1272. help
  1273. This option should be selected by machines which have an SMP-
  1274. capable CPU.
  1275. The only effect of this option is to make the SMP-related
  1276. options available to the user for configuration.
  1277. config SMP
  1278. bool "Symmetric Multi-Processing"
  1279. depends on CPU_V6K || CPU_V7
  1280. depends on GENERIC_CLOCKEVENTS
  1281. depends on HAVE_SMP
  1282. depends on MMU
  1283. select USE_GENERIC_SMP_HELPERS
  1284. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1285. help
  1286. This enables support for systems with more than one CPU. If you have
  1287. a system with only one CPU, like most personal computers, say N. If
  1288. you have a system with more than one CPU, say Y.
  1289. If you say N here, the kernel will run on single and multiprocessor
  1290. machines, but will use only one CPU of a multiprocessor machine. If
  1291. you say Y here, the kernel will run on many, but not all, single
  1292. processor machines. On a single processor machine, the kernel will
  1293. run faster if you say N here.
  1294. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1295. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1296. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1297. If you don't know what to do here, say N.
  1298. config SMP_ON_UP
  1299. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1300. depends on EXPERIMENTAL
  1301. depends on SMP && !XIP_KERNEL
  1302. default y
  1303. help
  1304. SMP kernels contain instructions which fail on non-SMP processors.
  1305. Enabling this option allows the kernel to modify itself to make
  1306. these instructions safe. Disabling it allows about 1K of space
  1307. savings.
  1308. If you don't know what to do here, say Y.
  1309. config ARM_CPU_TOPOLOGY
  1310. bool "Support cpu topology definition"
  1311. depends on SMP && CPU_V7
  1312. default y
  1313. help
  1314. Support ARM cpu topology definition. The MPIDR register defines
  1315. affinity between processors which is then used to describe the cpu
  1316. topology of an ARM System.
  1317. config SCHED_MC
  1318. bool "Multi-core scheduler support"
  1319. depends on ARM_CPU_TOPOLOGY
  1320. help
  1321. Multi-core scheduler support improves the CPU scheduler's decision
  1322. making when dealing with multi-core CPU chips at a cost of slightly
  1323. increased overhead in some places. If unsure say N here.
  1324. config SCHED_SMT
  1325. bool "SMT scheduler support"
  1326. depends on ARM_CPU_TOPOLOGY
  1327. help
  1328. Improves the CPU scheduler's decision making when dealing with
  1329. MultiThreading at a cost of slightly increased overhead in some
  1330. places. If unsure say N here.
  1331. config HAVE_ARM_SCU
  1332. bool
  1333. help
  1334. This option enables support for the ARM system coherency unit
  1335. config ARM_ARCH_TIMER
  1336. bool "Architected timer support"
  1337. depends on CPU_V7
  1338. help
  1339. This option enables support for the ARM architected timer
  1340. config HAVE_ARM_TWD
  1341. bool
  1342. depends on SMP
  1343. help
  1344. This options enables support for the ARM timer and watchdog unit
  1345. choice
  1346. prompt "Memory split"
  1347. default VMSPLIT_3G
  1348. help
  1349. Select the desired split between kernel and user memory.
  1350. If you are not absolutely sure what you are doing, leave this
  1351. option alone!
  1352. config VMSPLIT_3G
  1353. bool "3G/1G user/kernel split"
  1354. config VMSPLIT_2G
  1355. bool "2G/2G user/kernel split"
  1356. config VMSPLIT_1G
  1357. bool "1G/3G user/kernel split"
  1358. endchoice
  1359. config PAGE_OFFSET
  1360. hex
  1361. default 0x40000000 if VMSPLIT_1G
  1362. default 0x80000000 if VMSPLIT_2G
  1363. default 0xC0000000
  1364. config NR_CPUS
  1365. int "Maximum number of CPUs (2-32)"
  1366. range 2 32
  1367. depends on SMP
  1368. default "4"
  1369. config HOTPLUG_CPU
  1370. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1371. depends on SMP && HOTPLUG && EXPERIMENTAL
  1372. help
  1373. Say Y here to experiment with turning CPUs off and on. CPUs
  1374. can be controlled through /sys/devices/system/cpu.
  1375. config LOCAL_TIMERS
  1376. bool "Use local timer interrupts"
  1377. depends on SMP
  1378. default y
  1379. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1380. help
  1381. Enable support for local timers on SMP platforms, rather then the
  1382. legacy IPI broadcast method. Local timers allows the system
  1383. accounting to be spread across the timer interval, preventing a
  1384. "thundering herd" at every timer tick.
  1385. config ARCH_NR_GPIO
  1386. int
  1387. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1388. default 355 if ARCH_U8500
  1389. default 264 if MACH_H4700
  1390. default 512 if SOC_OMAP5
  1391. default 288 if ARCH_VT8500
  1392. default 0
  1393. help
  1394. Maximum number of GPIOs in the system.
  1395. If unsure, leave the default value.
  1396. source kernel/Kconfig.preempt
  1397. config HZ
  1398. int
  1399. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1400. ARCH_S5PV210 || ARCH_EXYNOS4
  1401. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1402. default AT91_TIMER_HZ if ARCH_AT91
  1403. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1404. default 100
  1405. config THUMB2_KERNEL
  1406. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1407. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1408. select AEABI
  1409. select ARM_ASM_UNIFIED
  1410. select ARM_UNWIND
  1411. help
  1412. By enabling this option, the kernel will be compiled in
  1413. Thumb-2 mode. A compiler/assembler that understand the unified
  1414. ARM-Thumb syntax is needed.
  1415. If unsure, say N.
  1416. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1417. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1418. depends on THUMB2_KERNEL && MODULES
  1419. default y
  1420. help
  1421. Various binutils versions can resolve Thumb-2 branches to
  1422. locally-defined, preemptible global symbols as short-range "b.n"
  1423. branch instructions.
  1424. This is a problem, because there's no guarantee the final
  1425. destination of the symbol, or any candidate locations for a
  1426. trampoline, are within range of the branch. For this reason, the
  1427. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1428. relocation in modules at all, and it makes little sense to add
  1429. support.
  1430. The symptom is that the kernel fails with an "unsupported
  1431. relocation" error when loading some modules.
  1432. Until fixed tools are available, passing
  1433. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1434. code which hits this problem, at the cost of a bit of extra runtime
  1435. stack usage in some cases.
  1436. The problem is described in more detail at:
  1437. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1438. Only Thumb-2 kernels are affected.
  1439. Unless you are sure your tools don't have this problem, say Y.
  1440. config ARM_ASM_UNIFIED
  1441. bool
  1442. config AEABI
  1443. bool "Use the ARM EABI to compile the kernel"
  1444. help
  1445. This option allows for the kernel to be compiled using the latest
  1446. ARM ABI (aka EABI). This is only useful if you are using a user
  1447. space environment that is also compiled with EABI.
  1448. Since there are major incompatibilities between the legacy ABI and
  1449. EABI, especially with regard to structure member alignment, this
  1450. option also changes the kernel syscall calling convention to
  1451. disambiguate both ABIs and allow for backward compatibility support
  1452. (selected with CONFIG_OABI_COMPAT).
  1453. To use this you need GCC version 4.0.0 or later.
  1454. config OABI_COMPAT
  1455. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1456. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1457. default y
  1458. help
  1459. This option preserves the old syscall interface along with the
  1460. new (ARM EABI) one. It also provides a compatibility layer to
  1461. intercept syscalls that have structure arguments which layout
  1462. in memory differs between the legacy ABI and the new ARM EABI
  1463. (only for non "thumb" binaries). This option adds a tiny
  1464. overhead to all syscalls and produces a slightly larger kernel.
  1465. If you know you'll be using only pure EABI user space then you
  1466. can say N here. If this option is not selected and you attempt
  1467. to execute a legacy ABI binary then the result will be
  1468. UNPREDICTABLE (in fact it can be predicted that it won't work
  1469. at all). If in doubt say Y.
  1470. config ARCH_HAS_HOLES_MEMORYMODEL
  1471. bool
  1472. config ARCH_SPARSEMEM_ENABLE
  1473. bool
  1474. config ARCH_SPARSEMEM_DEFAULT
  1475. def_bool ARCH_SPARSEMEM_ENABLE
  1476. config ARCH_SELECT_MEMORY_MODEL
  1477. def_bool ARCH_SPARSEMEM_ENABLE
  1478. config HAVE_ARCH_PFN_VALID
  1479. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1480. config HIGHMEM
  1481. bool "High Memory Support"
  1482. depends on MMU
  1483. help
  1484. The address space of ARM processors is only 4 Gigabytes large
  1485. and it has to accommodate user address space, kernel address
  1486. space as well as some memory mapped IO. That means that, if you
  1487. have a large amount of physical memory and/or IO, not all of the
  1488. memory can be "permanently mapped" by the kernel. The physical
  1489. memory that is not permanently mapped is called "high memory".
  1490. Depending on the selected kernel/user memory split, minimum
  1491. vmalloc space and actual amount of RAM, you may not need this
  1492. option which should result in a slightly faster kernel.
  1493. If unsure, say n.
  1494. config HIGHPTE
  1495. bool "Allocate 2nd-level pagetables from highmem"
  1496. depends on HIGHMEM
  1497. config HW_PERF_EVENTS
  1498. bool "Enable hardware performance counter support for perf events"
  1499. depends on PERF_EVENTS
  1500. default y
  1501. help
  1502. Enable hardware performance counter support for perf events. If
  1503. disabled, perf events will use software events only.
  1504. source "mm/Kconfig"
  1505. config FORCE_MAX_ZONEORDER
  1506. int "Maximum zone order" if ARCH_SHMOBILE
  1507. range 11 64 if ARCH_SHMOBILE
  1508. default "9" if SA1111
  1509. default "11"
  1510. help
  1511. The kernel memory allocator divides physically contiguous memory
  1512. blocks into "zones", where each zone is a power of two number of
  1513. pages. This option selects the largest power of two that the kernel
  1514. keeps in the memory allocator. If you need to allocate very large
  1515. blocks of physically contiguous memory, then you may need to
  1516. increase this value.
  1517. This config option is actually maximum order plus one. For example,
  1518. a value of 11 means that the largest free memory block is 2^10 pages.
  1519. config LEDS
  1520. bool "Timer and CPU usage LEDs"
  1521. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1522. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1523. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1524. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1525. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1526. ARCH_AT91 || ARCH_DAVINCI || \
  1527. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1528. help
  1529. If you say Y here, the LEDs on your machine will be used
  1530. to provide useful information about your current system status.
  1531. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1532. be able to select which LEDs are active using the options below. If
  1533. you are compiling a kernel for the EBSA-110 or the LART however, the
  1534. red LED will simply flash regularly to indicate that the system is
  1535. still functional. It is safe to say Y here if you have a CATS
  1536. system, but the driver will do nothing.
  1537. config LEDS_TIMER
  1538. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1539. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1540. || MACH_OMAP_PERSEUS2
  1541. depends on LEDS
  1542. depends on !GENERIC_CLOCKEVENTS
  1543. default y if ARCH_EBSA110
  1544. help
  1545. If you say Y here, one of the system LEDs (the green one on the
  1546. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1547. will flash regularly to indicate that the system is still
  1548. operational. This is mainly useful to kernel hackers who are
  1549. debugging unstable kernels.
  1550. The LART uses the same LED for both Timer LED and CPU usage LED
  1551. functions. You may choose to use both, but the Timer LED function
  1552. will overrule the CPU usage LED.
  1553. config LEDS_CPU
  1554. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1555. !ARCH_OMAP) \
  1556. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1557. || MACH_OMAP_PERSEUS2
  1558. depends on LEDS
  1559. help
  1560. If you say Y here, the red LED will be used to give a good real
  1561. time indication of CPU usage, by lighting whenever the idle task
  1562. is not currently executing.
  1563. The LART uses the same LED for both Timer LED and CPU usage LED
  1564. functions. You may choose to use both, but the Timer LED function
  1565. will overrule the CPU usage LED.
  1566. config ALIGNMENT_TRAP
  1567. bool
  1568. depends on CPU_CP15_MMU
  1569. default y if !ARCH_EBSA110
  1570. select HAVE_PROC_CPU if PROC_FS
  1571. help
  1572. ARM processors cannot fetch/store information which is not
  1573. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1574. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1575. fetch/store instructions will be emulated in software if you say
  1576. here, which has a severe performance impact. This is necessary for
  1577. correct operation of some network protocols. With an IP-only
  1578. configuration it is safe to say N, otherwise say Y.
  1579. config UACCESS_WITH_MEMCPY
  1580. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1581. depends on MMU && EXPERIMENTAL
  1582. default y if CPU_FEROCEON
  1583. help
  1584. Implement faster copy_to_user and clear_user methods for CPU
  1585. cores where a 8-word STM instruction give significantly higher
  1586. memory write throughput than a sequence of individual 32bit stores.
  1587. A possible side effect is a slight increase in scheduling latency
  1588. between threads sharing the same address space if they invoke
  1589. such copy operations with large buffers.
  1590. However, if the CPU data cache is using a write-allocate mode,
  1591. this option is unlikely to provide any performance gain.
  1592. config SECCOMP
  1593. bool
  1594. prompt "Enable seccomp to safely compute untrusted bytecode"
  1595. ---help---
  1596. This kernel feature is useful for number crunching applications
  1597. that may need to compute untrusted bytecode during their
  1598. execution. By using pipes or other transports made available to
  1599. the process as file descriptors supporting the read/write
  1600. syscalls, it's possible to isolate those applications in
  1601. their own address space using seccomp. Once seccomp is
  1602. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1603. and the task is only allowed to execute a few safe syscalls
  1604. defined by each seccomp mode.
  1605. config CC_STACKPROTECTOR
  1606. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1607. depends on EXPERIMENTAL
  1608. help
  1609. This option turns on the -fstack-protector GCC feature. This
  1610. feature puts, at the beginning of functions, a canary value on
  1611. the stack just before the return address, and validates
  1612. the value just before actually returning. Stack based buffer
  1613. overflows (that need to overwrite this return address) now also
  1614. overwrite the canary, which gets detected and the attack is then
  1615. neutralized via a kernel panic.
  1616. This feature requires gcc version 4.2 or above.
  1617. config DEPRECATED_PARAM_STRUCT
  1618. bool "Provide old way to pass kernel parameters"
  1619. help
  1620. This was deprecated in 2001 and announced to live on for 5 years.
  1621. Some old boot loaders still use this way.
  1622. endmenu
  1623. menu "Boot options"
  1624. config USE_OF
  1625. bool "Flattened Device Tree support"
  1626. select OF
  1627. select OF_EARLY_FLATTREE
  1628. select IRQ_DOMAIN
  1629. help
  1630. Include support for flattened device tree machine descriptions.
  1631. # Compressed boot loader in ROM. Yes, we really want to ask about
  1632. # TEXT and BSS so we preserve their values in the config files.
  1633. config ZBOOT_ROM_TEXT
  1634. hex "Compressed ROM boot loader base address"
  1635. default "0"
  1636. help
  1637. The physical address at which the ROM-able zImage is to be
  1638. placed in the target. Platforms which normally make use of
  1639. ROM-able zImage formats normally set this to a suitable
  1640. value in their defconfig file.
  1641. If ZBOOT_ROM is not enabled, this has no effect.
  1642. config ZBOOT_ROM_BSS
  1643. hex "Compressed ROM boot loader BSS address"
  1644. default "0"
  1645. help
  1646. The base address of an area of read/write memory in the target
  1647. for the ROM-able zImage which must be available while the
  1648. decompressor is running. It must be large enough to hold the
  1649. entire decompressed kernel plus an additional 128 KiB.
  1650. Platforms which normally make use of ROM-able zImage formats
  1651. normally set this to a suitable value in their defconfig file.
  1652. If ZBOOT_ROM is not enabled, this has no effect.
  1653. config ZBOOT_ROM
  1654. bool "Compressed boot loader in ROM/flash"
  1655. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1656. help
  1657. Say Y here if you intend to execute your compressed kernel image
  1658. (zImage) directly from ROM or flash. If unsure, say N.
  1659. choice
  1660. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1661. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1662. default ZBOOT_ROM_NONE
  1663. help
  1664. Include experimental SD/MMC loading code in the ROM-able zImage.
  1665. With this enabled it is possible to write the ROM-able zImage
  1666. kernel image to an MMC or SD card and boot the kernel straight
  1667. from the reset vector. At reset the processor Mask ROM will load
  1668. the first part of the ROM-able zImage which in turn loads the
  1669. rest the kernel image to RAM.
  1670. config ZBOOT_ROM_NONE
  1671. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1672. help
  1673. Do not load image from SD or MMC
  1674. config ZBOOT_ROM_MMCIF
  1675. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1676. help
  1677. Load image from MMCIF hardware block.
  1678. config ZBOOT_ROM_SH_MOBILE_SDHI
  1679. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1680. help
  1681. Load image from SDHI hardware block
  1682. endchoice
  1683. config ARM_APPENDED_DTB
  1684. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1685. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1686. help
  1687. With this option, the boot code will look for a device tree binary
  1688. (DTB) appended to zImage
  1689. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1690. This is meant as a backward compatibility convenience for those
  1691. systems with a bootloader that can't be upgraded to accommodate
  1692. the documented boot protocol using a device tree.
  1693. Beware that there is very little in terms of protection against
  1694. this option being confused by leftover garbage in memory that might
  1695. look like a DTB header after a reboot if no actual DTB is appended
  1696. to zImage. Do not leave this option active in a production kernel
  1697. if you don't intend to always append a DTB. Proper passing of the
  1698. location into r2 of a bootloader provided DTB is always preferable
  1699. to this option.
  1700. config ARM_ATAG_DTB_COMPAT
  1701. bool "Supplement the appended DTB with traditional ATAG information"
  1702. depends on ARM_APPENDED_DTB
  1703. help
  1704. Some old bootloaders can't be updated to a DTB capable one, yet
  1705. they provide ATAGs with memory configuration, the ramdisk address,
  1706. the kernel cmdline string, etc. Such information is dynamically
  1707. provided by the bootloader and can't always be stored in a static
  1708. DTB. To allow a device tree enabled kernel to be used with such
  1709. bootloaders, this option allows zImage to extract the information
  1710. from the ATAG list and store it at run time into the appended DTB.
  1711. choice
  1712. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1713. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1714. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1715. bool "Use bootloader kernel arguments if available"
  1716. help
  1717. Uses the command-line options passed by the boot loader instead of
  1718. the device tree bootargs property. If the boot loader doesn't provide
  1719. any, the device tree bootargs property will be used.
  1720. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1721. bool "Extend with bootloader kernel arguments"
  1722. help
  1723. The command-line arguments provided by the boot loader will be
  1724. appended to the the device tree bootargs property.
  1725. endchoice
  1726. config CMDLINE
  1727. string "Default kernel command string"
  1728. default ""
  1729. help
  1730. On some architectures (EBSA110 and CATS), there is currently no way
  1731. for the boot loader to pass arguments to the kernel. For these
  1732. architectures, you should supply some command-line options at build
  1733. time by entering them here. As a minimum, you should specify the
  1734. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1735. choice
  1736. prompt "Kernel command line type" if CMDLINE != ""
  1737. default CMDLINE_FROM_BOOTLOADER
  1738. config CMDLINE_FROM_BOOTLOADER
  1739. bool "Use bootloader kernel arguments if available"
  1740. help
  1741. Uses the command-line options passed by the boot loader. If
  1742. the boot loader doesn't provide any, the default kernel command
  1743. string provided in CMDLINE will be used.
  1744. config CMDLINE_EXTEND
  1745. bool "Extend bootloader kernel arguments"
  1746. help
  1747. The command-line arguments provided by the boot loader will be
  1748. appended to the default kernel command string.
  1749. config CMDLINE_FORCE
  1750. bool "Always use the default kernel command string"
  1751. help
  1752. Always use the default kernel command string, even if the boot
  1753. loader passes other arguments to the kernel.
  1754. This is useful if you cannot or don't want to change the
  1755. command-line options your boot loader passes to the kernel.
  1756. endchoice
  1757. config XIP_KERNEL
  1758. bool "Kernel Execute-In-Place from ROM"
  1759. depends on !ZBOOT_ROM && !ARM_LPAE
  1760. help
  1761. Execute-In-Place allows the kernel to run from non-volatile storage
  1762. directly addressable by the CPU, such as NOR flash. This saves RAM
  1763. space since the text section of the kernel is not loaded from flash
  1764. to RAM. Read-write sections, such as the data section and stack,
  1765. are still copied to RAM. The XIP kernel is not compressed since
  1766. it has to run directly from flash, so it will take more space to
  1767. store it. The flash address used to link the kernel object files,
  1768. and for storing it, is configuration dependent. Therefore, if you
  1769. say Y here, you must know the proper physical address where to
  1770. store the kernel image depending on your own flash memory usage.
  1771. Also note that the make target becomes "make xipImage" rather than
  1772. "make zImage" or "make Image". The final kernel binary to put in
  1773. ROM memory will be arch/arm/boot/xipImage.
  1774. If unsure, say N.
  1775. config XIP_PHYS_ADDR
  1776. hex "XIP Kernel Physical Location"
  1777. depends on XIP_KERNEL
  1778. default "0x00080000"
  1779. help
  1780. This is the physical address in your flash memory the kernel will
  1781. be linked for and stored to. This address is dependent on your
  1782. own flash usage.
  1783. config KEXEC
  1784. bool "Kexec system call (EXPERIMENTAL)"
  1785. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1786. help
  1787. kexec is a system call that implements the ability to shutdown your
  1788. current kernel, and to start another kernel. It is like a reboot
  1789. but it is independent of the system firmware. And like a reboot
  1790. you can start any kernel with it, not just Linux.
  1791. It is an ongoing process to be certain the hardware in a machine
  1792. is properly shutdown, so do not be surprised if this code does not
  1793. initially work for you. It may help to enable device hotplugging
  1794. support.
  1795. config ATAGS_PROC
  1796. bool "Export atags in procfs"
  1797. depends on KEXEC
  1798. default y
  1799. help
  1800. Should the atags used to boot the kernel be exported in an "atags"
  1801. file in procfs. Useful with kexec.
  1802. config CRASH_DUMP
  1803. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1804. depends on EXPERIMENTAL
  1805. help
  1806. Generate crash dump after being started by kexec. This should
  1807. be normally only set in special crash dump kernels which are
  1808. loaded in the main kernel with kexec-tools into a specially
  1809. reserved region and then later executed after a crash by
  1810. kdump/kexec. The crash dump kernel must be compiled to a
  1811. memory address not used by the main kernel
  1812. For more details see Documentation/kdump/kdump.txt
  1813. config AUTO_ZRELADDR
  1814. bool "Auto calculation of the decompressed kernel image address"
  1815. depends on !ZBOOT_ROM && !ARCH_U300
  1816. help
  1817. ZRELADDR is the physical address where the decompressed kernel
  1818. image will be placed. If AUTO_ZRELADDR is selected, the address
  1819. will be determined at run-time by masking the current IP with
  1820. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1821. from start of memory.
  1822. endmenu
  1823. menu "CPU Power Management"
  1824. if ARCH_HAS_CPUFREQ
  1825. source "drivers/cpufreq/Kconfig"
  1826. config CPU_FREQ_IMX
  1827. tristate "CPUfreq driver for i.MX CPUs"
  1828. depends on ARCH_MXC && CPU_FREQ
  1829. select CPU_FREQ_TABLE
  1830. help
  1831. This enables the CPUfreq driver for i.MX CPUs.
  1832. config CPU_FREQ_SA1100
  1833. bool
  1834. config CPU_FREQ_SA1110
  1835. bool
  1836. config CPU_FREQ_INTEGRATOR
  1837. tristate "CPUfreq driver for ARM Integrator CPUs"
  1838. depends on ARCH_INTEGRATOR && CPU_FREQ
  1839. default y
  1840. help
  1841. This enables the CPUfreq driver for ARM Integrator CPUs.
  1842. For details, take a look at <file:Documentation/cpu-freq>.
  1843. If in doubt, say Y.
  1844. config CPU_FREQ_PXA
  1845. bool
  1846. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1847. default y
  1848. select CPU_FREQ_TABLE
  1849. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1850. config CPU_FREQ_S3C
  1851. bool
  1852. help
  1853. Internal configuration node for common cpufreq on Samsung SoC
  1854. config CPU_FREQ_S3C24XX
  1855. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1856. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1857. select CPU_FREQ_S3C
  1858. help
  1859. This enables the CPUfreq driver for the Samsung S3C24XX family
  1860. of CPUs.
  1861. For details, take a look at <file:Documentation/cpu-freq>.
  1862. If in doubt, say N.
  1863. config CPU_FREQ_S3C24XX_PLL
  1864. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1865. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1866. help
  1867. Compile in support for changing the PLL frequency from the
  1868. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1869. after a frequency change, so by default it is not enabled.
  1870. This also means that the PLL tables for the selected CPU(s) will
  1871. be built which may increase the size of the kernel image.
  1872. config CPU_FREQ_S3C24XX_DEBUG
  1873. bool "Debug CPUfreq Samsung driver core"
  1874. depends on CPU_FREQ_S3C24XX
  1875. help
  1876. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1877. config CPU_FREQ_S3C24XX_IODEBUG
  1878. bool "Debug CPUfreq Samsung driver IO timing"
  1879. depends on CPU_FREQ_S3C24XX
  1880. help
  1881. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1882. config CPU_FREQ_S3C24XX_DEBUGFS
  1883. bool "Export debugfs for CPUFreq"
  1884. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1885. help
  1886. Export status information via debugfs.
  1887. endif
  1888. source "drivers/cpuidle/Kconfig"
  1889. endmenu
  1890. menu "Floating point emulation"
  1891. comment "At least one emulation must be selected"
  1892. config FPE_NWFPE
  1893. bool "NWFPE math emulation"
  1894. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1895. ---help---
  1896. Say Y to include the NWFPE floating point emulator in the kernel.
  1897. This is necessary to run most binaries. Linux does not currently
  1898. support floating point hardware so you need to say Y here even if
  1899. your machine has an FPA or floating point co-processor podule.
  1900. You may say N here if you are going to load the Acorn FPEmulator
  1901. early in the bootup.
  1902. config FPE_NWFPE_XP
  1903. bool "Support extended precision"
  1904. depends on FPE_NWFPE
  1905. help
  1906. Say Y to include 80-bit support in the kernel floating-point
  1907. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1908. Note that gcc does not generate 80-bit operations by default,
  1909. so in most cases this option only enlarges the size of the
  1910. floating point emulator without any good reason.
  1911. You almost surely want to say N here.
  1912. config FPE_FASTFPE
  1913. bool "FastFPE math emulation (EXPERIMENTAL)"
  1914. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1915. ---help---
  1916. Say Y here to include the FAST floating point emulator in the kernel.
  1917. This is an experimental much faster emulator which now also has full
  1918. precision for the mantissa. It does not support any exceptions.
  1919. It is very simple, and approximately 3-6 times faster than NWFPE.
  1920. It should be sufficient for most programs. It may be not suitable
  1921. for scientific calculations, but you have to check this for yourself.
  1922. If you do not feel you need a faster FP emulation you should better
  1923. choose NWFPE.
  1924. config VFP
  1925. bool "VFP-format floating point maths"
  1926. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1927. help
  1928. Say Y to include VFP support code in the kernel. This is needed
  1929. if your hardware includes a VFP unit.
  1930. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1931. release notes and additional status information.
  1932. Say N if your target does not have VFP hardware.
  1933. config VFPv3
  1934. bool
  1935. depends on VFP
  1936. default y if CPU_V7
  1937. config NEON
  1938. bool "Advanced SIMD (NEON) Extension support"
  1939. depends on VFPv3 && CPU_V7
  1940. help
  1941. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1942. Extension.
  1943. endmenu
  1944. menu "Userspace binary formats"
  1945. source "fs/Kconfig.binfmt"
  1946. config ARTHUR
  1947. tristate "RISC OS personality"
  1948. depends on !AEABI
  1949. help
  1950. Say Y here to include the kernel code necessary if you want to run
  1951. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1952. experimental; if this sounds frightening, say N and sleep in peace.
  1953. You can also say M here to compile this support as a module (which
  1954. will be called arthur).
  1955. endmenu
  1956. menu "Power management options"
  1957. source "kernel/power/Kconfig"
  1958. config ARCH_SUSPEND_POSSIBLE
  1959. depends on !ARCH_S5PC100
  1960. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1961. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1962. def_bool y
  1963. config ARM_CPU_SUSPEND
  1964. def_bool PM_SLEEP
  1965. endmenu
  1966. source "net/Kconfig"
  1967. source "drivers/Kconfig"
  1968. source "fs/Kconfig"
  1969. source "arch/arm/Kconfig.debug"
  1970. source "security/Kconfig"
  1971. source "crypto/Kconfig"
  1972. source "lib/Kconfig"