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 (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 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 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 CLKDEV_LOOKUP
  242. select HAVE_MACH_CLKDEV
  243. select ICST
  244. select GENERIC_CLOCKEVENTS
  245. select ARCH_WANT_OPTIONAL_GPIOLIB
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLOCK
  248. select PLAT_VERSATILE_CLCD
  249. select ARM_TIMER_SP804
  250. select GPIO_PL061 if GPIOLIB
  251. select NEED_MACH_MEMORY_H
  252. help
  253. This enables support for ARM Ltd RealView boards.
  254. config ARCH_VERSATILE
  255. bool "ARM Ltd. Versatile family"
  256. select ARM_AMBA
  257. select ARM_VIC
  258. select CLKDEV_LOOKUP
  259. select HAVE_MACH_CLKDEV
  260. select ICST
  261. select GENERIC_CLOCKEVENTS
  262. select ARCH_WANT_OPTIONAL_GPIOLIB
  263. select PLAT_VERSATILE
  264. select PLAT_VERSATILE_CLOCK
  265. select PLAT_VERSATILE_CLCD
  266. select PLAT_VERSATILE_FPGA_IRQ
  267. select ARM_TIMER_SP804
  268. help
  269. This enables support for ARM Ltd Versatile board.
  270. config ARCH_VEXPRESS
  271. bool "ARM Ltd. Versatile Express family"
  272. select ARCH_WANT_OPTIONAL_GPIOLIB
  273. select ARM_AMBA
  274. select ARM_TIMER_SP804
  275. select CLKDEV_LOOKUP
  276. select COMMON_CLK
  277. select GENERIC_CLOCKEVENTS
  278. select HAVE_CLK
  279. select HAVE_PATA_PLATFORM
  280. select ICST
  281. select NO_IOPORT
  282. select PLAT_VERSATILE
  283. select PLAT_VERSATILE_CLCD
  284. select REGULATOR_FIXED_VOLTAGE if REGULATOR
  285. help
  286. This enables support for the ARM Ltd Versatile Express boards.
  287. config ARCH_AT91
  288. bool "Atmel AT91"
  289. select ARCH_REQUIRE_GPIOLIB
  290. select HAVE_CLK
  291. select CLKDEV_LOOKUP
  292. select IRQ_DOMAIN
  293. select NEED_MACH_IO_H if PCCARD
  294. help
  295. This enables support for systems based on Atmel
  296. AT91RM9200 and AT91SAM9* processors.
  297. config ARCH_BCMRING
  298. bool "Broadcom BCMRING"
  299. depends on MMU
  300. select CPU_V6
  301. select ARM_AMBA
  302. select ARM_TIMER_SP804
  303. select CLKDEV_LOOKUP
  304. select GENERIC_CLOCKEVENTS
  305. select ARCH_WANT_OPTIONAL_GPIOLIB
  306. help
  307. Support for Broadcom's BCMRing platform.
  308. config ARCH_HIGHBANK
  309. bool "Calxeda Highbank-based"
  310. select ARCH_WANT_OPTIONAL_GPIOLIB
  311. select ARM_AMBA
  312. select ARM_GIC
  313. select ARM_TIMER_SP804
  314. select CACHE_L2X0
  315. select CLKDEV_LOOKUP
  316. select COMMON_CLK
  317. select CPU_V7
  318. select GENERIC_CLOCKEVENTS
  319. select HAVE_ARM_SCU
  320. select HAVE_SMP
  321. select SPARSE_IRQ
  322. select USE_OF
  323. help
  324. Support for the Calxeda Highbank SoC based boards.
  325. config ARCH_CLPS711X
  326. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  327. select CPU_ARM720T
  328. select ARCH_USES_GETTIMEOFFSET
  329. select NEED_MACH_MEMORY_H
  330. help
  331. Support for Cirrus Logic 711x/721x/731x based boards.
  332. config ARCH_CNS3XXX
  333. bool "Cavium Networks CNS3XXX family"
  334. select CPU_V6K
  335. select GENERIC_CLOCKEVENTS
  336. select ARM_GIC
  337. select MIGHT_HAVE_CACHE_L2X0
  338. select MIGHT_HAVE_PCI
  339. select PCI_DOMAINS if PCI
  340. help
  341. Support for Cavium Networks CNS3XXX platform.
  342. config ARCH_GEMINI
  343. bool "Cortina Systems Gemini"
  344. select CPU_FA526
  345. select ARCH_REQUIRE_GPIOLIB
  346. select ARCH_USES_GETTIMEOFFSET
  347. help
  348. Support for the Cortina Systems Gemini family SoCs
  349. config ARCH_SIRF
  350. bool "CSR SiRF"
  351. select NO_IOPORT
  352. select ARCH_REQUIRE_GPIOLIB
  353. select GENERIC_CLOCKEVENTS
  354. select COMMON_CLK
  355. select GENERIC_IRQ_CHIP
  356. select MIGHT_HAVE_CACHE_L2X0
  357. select PINCTRL
  358. select PINCTRL_SIRF
  359. select USE_OF
  360. help
  361. Support for CSR SiRFprimaII/Marco/Polo platforms
  362. config ARCH_EBSA110
  363. bool "EBSA-110"
  364. select CPU_SA110
  365. select ISA
  366. select NO_IOPORT
  367. select ARCH_USES_GETTIMEOFFSET
  368. select NEED_MACH_IO_H
  369. select NEED_MACH_MEMORY_H
  370. help
  371. This is an evaluation board for the StrongARM processor available
  372. from Digital. It has limited hardware on-board, including an
  373. Ethernet interface, two PCMCIA sockets, two serial ports and a
  374. parallel port.
  375. config ARCH_EP93XX
  376. bool "EP93xx-based"
  377. select CPU_ARM920T
  378. select ARM_AMBA
  379. select ARM_VIC
  380. select CLKDEV_LOOKUP
  381. select ARCH_REQUIRE_GPIOLIB
  382. select ARCH_HAS_HOLES_MEMORYMODEL
  383. select ARCH_USES_GETTIMEOFFSET
  384. select NEED_MACH_MEMORY_H
  385. help
  386. This enables support for the Cirrus EP93xx series of CPUs.
  387. config ARCH_FOOTBRIDGE
  388. bool "FootBridge"
  389. select CPU_SA110
  390. select FOOTBRIDGE
  391. select GENERIC_CLOCKEVENTS
  392. select HAVE_IDE
  393. select NEED_MACH_IO_H if !MMU
  394. select NEED_MACH_MEMORY_H
  395. help
  396. Support for systems based on the DC21285 companion chip
  397. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  398. config ARCH_MXC
  399. bool "Freescale MXC/iMX-based"
  400. select GENERIC_CLOCKEVENTS
  401. select ARCH_REQUIRE_GPIOLIB
  402. select CLKDEV_LOOKUP
  403. select CLKSRC_MMIO
  404. select GENERIC_IRQ_CHIP
  405. select MULTI_IRQ_HANDLER
  406. select SPARSE_IRQ
  407. select USE_OF
  408. help
  409. Support for Freescale MXC/iMX-based family of processors
  410. config ARCH_MXS
  411. bool "Freescale MXS-based"
  412. select GENERIC_CLOCKEVENTS
  413. select ARCH_REQUIRE_GPIOLIB
  414. select CLKDEV_LOOKUP
  415. select CLKSRC_MMIO
  416. select COMMON_CLK
  417. select HAVE_CLK_PREPARE
  418. select PINCTRL
  419. select USE_OF
  420. help
  421. Support for Freescale MXS-based family of processors
  422. config ARCH_NETX
  423. bool "Hilscher NetX based"
  424. select CLKSRC_MMIO
  425. select CPU_ARM926T
  426. select ARM_VIC
  427. select GENERIC_CLOCKEVENTS
  428. help
  429. This enables support for systems based on the Hilscher NetX Soc
  430. config ARCH_H720X
  431. bool "Hynix HMS720x-based"
  432. select CPU_ARM720T
  433. select ISA_DMA_API
  434. select ARCH_USES_GETTIMEOFFSET
  435. help
  436. This enables support for systems based on the Hynix HMS720x
  437. config ARCH_IOP13XX
  438. bool "IOP13xx-based"
  439. depends on MMU
  440. select CPU_XSC3
  441. select PLAT_IOP
  442. select PCI
  443. select ARCH_SUPPORTS_MSI
  444. select VMSPLIT_1G
  445. select NEED_MACH_MEMORY_H
  446. select NEED_RET_TO_USER
  447. help
  448. Support for Intel's IOP13XX (XScale) family of processors.
  449. config ARCH_IOP32X
  450. bool "IOP32x-based"
  451. depends on MMU
  452. select CPU_XSCALE
  453. select NEED_RET_TO_USER
  454. select PLAT_IOP
  455. select PCI
  456. select ARCH_REQUIRE_GPIOLIB
  457. help
  458. Support for Intel's 80219 and IOP32X (XScale) family of
  459. processors.
  460. config ARCH_IOP33X
  461. bool "IOP33x-based"
  462. depends on MMU
  463. select CPU_XSCALE
  464. select NEED_RET_TO_USER
  465. select PLAT_IOP
  466. select PCI
  467. select ARCH_REQUIRE_GPIOLIB
  468. help
  469. Support for Intel's IOP33X (XScale) family of processors.
  470. config ARCH_IXP4XX
  471. bool "IXP4xx-based"
  472. depends on MMU
  473. select ARCH_HAS_DMA_SET_COHERENT_MASK
  474. select CLKSRC_MMIO
  475. select CPU_XSCALE
  476. select ARCH_REQUIRE_GPIOLIB
  477. select GENERIC_CLOCKEVENTS
  478. select MIGHT_HAVE_PCI
  479. select NEED_MACH_IO_H
  480. select DMABOUNCE if PCI
  481. help
  482. Support for Intel's IXP4XX (XScale) family of processors.
  483. config ARCH_MVEBU
  484. bool "Marvell SOCs with Device Tree support"
  485. select GENERIC_CLOCKEVENTS
  486. select MULTI_IRQ_HANDLER
  487. select SPARSE_IRQ
  488. select CLKSRC_MMIO
  489. select GENERIC_IRQ_CHIP
  490. select IRQ_DOMAIN
  491. select COMMON_CLK
  492. help
  493. Support for the Marvell SoC Family with device tree support
  494. config ARCH_DOVE
  495. bool "Marvell Dove"
  496. select CPU_V7
  497. select PCI
  498. select ARCH_REQUIRE_GPIOLIB
  499. select GENERIC_CLOCKEVENTS
  500. select PLAT_ORION
  501. help
  502. Support for the Marvell Dove SoC 88AP510
  503. config ARCH_KIRKWOOD
  504. bool "Marvell Kirkwood"
  505. select CPU_FEROCEON
  506. select PCI
  507. select ARCH_REQUIRE_GPIOLIB
  508. select GENERIC_CLOCKEVENTS
  509. select PLAT_ORION
  510. help
  511. Support for the following Marvell Kirkwood series SoCs:
  512. 88F6180, 88F6192 and 88F6281.
  513. config ARCH_LPC32XX
  514. bool "NXP LPC32XX"
  515. select CLKSRC_MMIO
  516. select CPU_ARM926T
  517. select ARCH_REQUIRE_GPIOLIB
  518. select HAVE_IDE
  519. select ARM_AMBA
  520. select USB_ARCH_HAS_OHCI
  521. select CLKDEV_LOOKUP
  522. select GENERIC_CLOCKEVENTS
  523. select USE_OF
  524. select HAVE_PWM
  525. help
  526. Support for the NXP LPC32XX family of processors
  527. config ARCH_MV78XX0
  528. bool "Marvell MV78xx0"
  529. select CPU_FEROCEON
  530. select PCI
  531. select ARCH_REQUIRE_GPIOLIB
  532. select GENERIC_CLOCKEVENTS
  533. select PLAT_ORION
  534. help
  535. Support for the following Marvell MV78xx0 series SoCs:
  536. MV781x0, MV782x0.
  537. config ARCH_ORION5X
  538. bool "Marvell Orion"
  539. depends on MMU
  540. select CPU_FEROCEON
  541. select PCI
  542. select ARCH_REQUIRE_GPIOLIB
  543. select GENERIC_CLOCKEVENTS
  544. select PLAT_ORION
  545. help
  546. Support for the following Marvell Orion 5x series SoCs:
  547. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  548. Orion-2 (5281), Orion-1-90 (6183).
  549. config ARCH_MMP
  550. bool "Marvell PXA168/910/MMP2"
  551. depends on MMU
  552. select ARCH_REQUIRE_GPIOLIB
  553. select CLKDEV_LOOKUP
  554. select GENERIC_CLOCKEVENTS
  555. select GPIO_PXA
  556. select IRQ_DOMAIN
  557. select PLAT_PXA
  558. select SPARSE_IRQ
  559. select GENERIC_ALLOCATOR
  560. help
  561. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  562. config ARCH_KS8695
  563. bool "Micrel/Kendin KS8695"
  564. select CPU_ARM922T
  565. select ARCH_REQUIRE_GPIOLIB
  566. select NEED_MACH_MEMORY_H
  567. select CLKSRC_MMIO
  568. select GENERIC_CLOCKEVENTS
  569. help
  570. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  571. System-on-Chip devices.
  572. config ARCH_W90X900
  573. bool "Nuvoton W90X900 CPU"
  574. select CPU_ARM926T
  575. select ARCH_REQUIRE_GPIOLIB
  576. select CLKDEV_LOOKUP
  577. select CLKSRC_MMIO
  578. select GENERIC_CLOCKEVENTS
  579. help
  580. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  581. At present, the w90x900 has been renamed nuc900, regarding
  582. the ARM series product line, you can login the following
  583. link address to know more.
  584. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  585. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  586. config ARCH_TEGRA
  587. bool "NVIDIA Tegra"
  588. select CLKDEV_LOOKUP
  589. select CLKSRC_MMIO
  590. select GENERIC_CLOCKEVENTS
  591. select GENERIC_GPIO
  592. select HAVE_CLK
  593. select HAVE_SMP
  594. select MIGHT_HAVE_CACHE_L2X0
  595. select ARCH_HAS_CPUFREQ
  596. select USE_OF
  597. help
  598. This enables support for NVIDIA Tegra based systems (Tegra APX,
  599. Tegra 6xx and Tegra 2 series).
  600. config ARCH_PICOXCELL
  601. bool "Picochip picoXcell"
  602. select ARCH_REQUIRE_GPIOLIB
  603. select ARM_PATCH_PHYS_VIRT
  604. select ARM_VIC
  605. select CPU_V6K
  606. select DW_APB_TIMER
  607. select DW_APB_TIMER_OF
  608. select GENERIC_CLOCKEVENTS
  609. select GENERIC_GPIO
  610. select HAVE_TCM
  611. select NO_IOPORT
  612. select SPARSE_IRQ
  613. select USE_OF
  614. help
  615. This enables support for systems based on the Picochip picoXcell
  616. family of Femtocell devices. The picoxcell support requires device tree
  617. for all boards.
  618. config ARCH_PXA
  619. bool "PXA2xx/PXA3xx-based"
  620. depends on MMU
  621. select ARCH_MTD_XIP
  622. select ARCH_HAS_CPUFREQ
  623. select CLKDEV_LOOKUP
  624. select CLKSRC_MMIO
  625. select ARCH_REQUIRE_GPIOLIB
  626. select GENERIC_CLOCKEVENTS
  627. select GPIO_PXA
  628. select PLAT_PXA
  629. select SPARSE_IRQ
  630. select AUTO_ZRELADDR
  631. select MULTI_IRQ_HANDLER
  632. select ARM_CPU_SUSPEND if PM
  633. select HAVE_IDE
  634. help
  635. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  636. config ARCH_MSM
  637. bool "Qualcomm MSM"
  638. select HAVE_CLK
  639. select GENERIC_CLOCKEVENTS
  640. select ARCH_REQUIRE_GPIOLIB
  641. select CLKDEV_LOOKUP
  642. help
  643. Support for Qualcomm MSM/QSD based systems. This runs on the
  644. apps processor of the MSM/QSD and depends on a shared memory
  645. interface to the modem processor which runs the baseband
  646. stack and controls some vital subsystems
  647. (clock and power control, etc).
  648. config ARCH_SHMOBILE
  649. bool "Renesas SH-Mobile / R-Mobile"
  650. select HAVE_CLK
  651. select CLKDEV_LOOKUP
  652. select HAVE_MACH_CLKDEV
  653. select HAVE_SMP
  654. select GENERIC_CLOCKEVENTS
  655. select MIGHT_HAVE_CACHE_L2X0
  656. select NO_IOPORT
  657. select SPARSE_IRQ
  658. select MULTI_IRQ_HANDLER
  659. select PM_GENERIC_DOMAINS if PM
  660. select NEED_MACH_MEMORY_H
  661. help
  662. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  663. config ARCH_RPC
  664. bool "RiscPC"
  665. select ARCH_ACORN
  666. select FIQ
  667. select ARCH_MAY_HAVE_PC_FDC
  668. select HAVE_PATA_PLATFORM
  669. select ISA_DMA_API
  670. select NO_IOPORT
  671. select ARCH_SPARSEMEM_ENABLE
  672. select ARCH_USES_GETTIMEOFFSET
  673. select HAVE_IDE
  674. select NEED_MACH_IO_H
  675. select NEED_MACH_MEMORY_H
  676. help
  677. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  678. CD-ROM interface, serial and parallel port, and the floppy drive.
  679. config ARCH_SA1100
  680. bool "SA1100-based"
  681. select CLKSRC_MMIO
  682. select CPU_SA1100
  683. select ISA
  684. select ARCH_SPARSEMEM_ENABLE
  685. select ARCH_MTD_XIP
  686. select ARCH_HAS_CPUFREQ
  687. select CPU_FREQ
  688. select GENERIC_CLOCKEVENTS
  689. select CLKDEV_LOOKUP
  690. select ARCH_REQUIRE_GPIOLIB
  691. select HAVE_IDE
  692. select NEED_MACH_MEMORY_H
  693. select SPARSE_IRQ
  694. help
  695. Support for StrongARM 11x0 based boards.
  696. config ARCH_S3C24XX
  697. bool "Samsung S3C24XX SoCs"
  698. select GENERIC_GPIO
  699. select ARCH_HAS_CPUFREQ
  700. select HAVE_CLK
  701. select CLKDEV_LOOKUP
  702. select ARCH_USES_GETTIMEOFFSET
  703. select HAVE_S3C2410_I2C if I2C
  704. select HAVE_S3C_RTC if RTC_CLASS
  705. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  706. select NEED_MACH_IO_H
  707. help
  708. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  709. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  710. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  711. Samsung SMDK2410 development board (and derivatives).
  712. config ARCH_S3C64XX
  713. bool "Samsung S3C64XX"
  714. select PLAT_SAMSUNG
  715. select CPU_V6
  716. select ARM_VIC
  717. select HAVE_CLK
  718. select HAVE_TCM
  719. select CLKDEV_LOOKUP
  720. select NO_IOPORT
  721. select ARCH_USES_GETTIMEOFFSET
  722. select ARCH_HAS_CPUFREQ
  723. select ARCH_REQUIRE_GPIOLIB
  724. select SAMSUNG_CLKSRC
  725. select SAMSUNG_IRQ_VIC_TIMER
  726. select S3C_GPIO_TRACK
  727. select S3C_DEV_NAND
  728. select USB_ARCH_HAS_OHCI
  729. select SAMSUNG_GPIOLIB_4BIT
  730. select HAVE_S3C2410_I2C if I2C
  731. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  732. help
  733. Samsung S3C64XX series based systems
  734. config ARCH_S5P64X0
  735. bool "Samsung S5P6440 S5P6450"
  736. select CPU_V6
  737. select GENERIC_GPIO
  738. select HAVE_CLK
  739. select CLKDEV_LOOKUP
  740. select CLKSRC_MMIO
  741. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  742. select GENERIC_CLOCKEVENTS
  743. select HAVE_S3C2410_I2C if I2C
  744. select HAVE_S3C_RTC if RTC_CLASS
  745. help
  746. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  747. SMDK6450.
  748. config ARCH_S5PC100
  749. bool "Samsung S5PC100"
  750. select GENERIC_GPIO
  751. select HAVE_CLK
  752. select CLKDEV_LOOKUP
  753. select CPU_V7
  754. select ARCH_USES_GETTIMEOFFSET
  755. select HAVE_S3C2410_I2C if I2C
  756. select HAVE_S3C_RTC if RTC_CLASS
  757. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  758. help
  759. Samsung S5PC100 series based systems
  760. config ARCH_S5PV210
  761. bool "Samsung S5PV210/S5PC110"
  762. select CPU_V7
  763. select ARCH_SPARSEMEM_ENABLE
  764. select ARCH_HAS_HOLES_MEMORYMODEL
  765. select GENERIC_GPIO
  766. select HAVE_CLK
  767. select CLKDEV_LOOKUP
  768. select CLKSRC_MMIO
  769. select ARCH_HAS_CPUFREQ
  770. select GENERIC_CLOCKEVENTS
  771. select HAVE_S3C2410_I2C if I2C
  772. select HAVE_S3C_RTC if RTC_CLASS
  773. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  774. select NEED_MACH_MEMORY_H
  775. help
  776. Samsung S5PV210/S5PC110 series based systems
  777. config ARCH_EXYNOS
  778. bool "SAMSUNG EXYNOS"
  779. select CPU_V7
  780. select ARCH_SPARSEMEM_ENABLE
  781. select ARCH_HAS_HOLES_MEMORYMODEL
  782. select GENERIC_GPIO
  783. select HAVE_CLK
  784. select CLKDEV_LOOKUP
  785. select ARCH_HAS_CPUFREQ
  786. select GENERIC_CLOCKEVENTS
  787. select HAVE_S3C_RTC if RTC_CLASS
  788. select HAVE_S3C2410_I2C if I2C
  789. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  790. select NEED_MACH_MEMORY_H
  791. help
  792. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  793. config ARCH_SHARK
  794. bool "Shark"
  795. select CPU_SA110
  796. select ISA
  797. select ISA_DMA
  798. select ZONE_DMA
  799. select PCI
  800. select ARCH_USES_GETTIMEOFFSET
  801. select NEED_MACH_MEMORY_H
  802. help
  803. Support for the StrongARM based Digital DNARD machine, also known
  804. as "Shark" (<http://www.shark-linux.de/shark.html>).
  805. config ARCH_U300
  806. bool "ST-Ericsson U300 Series"
  807. depends on MMU
  808. select CLKSRC_MMIO
  809. select CPU_ARM926T
  810. select HAVE_TCM
  811. select ARM_AMBA
  812. select ARM_PATCH_PHYS_VIRT
  813. select ARM_VIC
  814. select GENERIC_CLOCKEVENTS
  815. select CLKDEV_LOOKUP
  816. select COMMON_CLK
  817. select GENERIC_GPIO
  818. select ARCH_REQUIRE_GPIOLIB
  819. select SPARSE_IRQ
  820. help
  821. Support for ST-Ericsson U300 series mobile platforms.
  822. config ARCH_U8500
  823. bool "ST-Ericsson U8500 Series"
  824. depends on MMU
  825. select CPU_V7
  826. select ARM_AMBA
  827. select GENERIC_CLOCKEVENTS
  828. select CLKDEV_LOOKUP
  829. select ARCH_REQUIRE_GPIOLIB
  830. select ARCH_HAS_CPUFREQ
  831. select HAVE_SMP
  832. select MIGHT_HAVE_CACHE_L2X0
  833. help
  834. Support for ST-Ericsson's Ux500 architecture
  835. config ARCH_NOMADIK
  836. bool "STMicroelectronics Nomadik"
  837. select ARM_AMBA
  838. select ARM_VIC
  839. select CPU_ARM926T
  840. select COMMON_CLK
  841. select GENERIC_CLOCKEVENTS
  842. select PINCTRL
  843. select MIGHT_HAVE_CACHE_L2X0
  844. select ARCH_REQUIRE_GPIOLIB
  845. help
  846. Support for the Nomadik platform by ST-Ericsson
  847. config ARCH_DAVINCI
  848. bool "TI DaVinci"
  849. select GENERIC_CLOCKEVENTS
  850. select ARCH_REQUIRE_GPIOLIB
  851. select ZONE_DMA
  852. select HAVE_IDE
  853. select CLKDEV_LOOKUP
  854. select GENERIC_ALLOCATOR
  855. select GENERIC_IRQ_CHIP
  856. select ARCH_HAS_HOLES_MEMORYMODEL
  857. help
  858. Support for TI's DaVinci platform.
  859. config ARCH_OMAP
  860. bool "TI OMAP"
  861. depends on MMU
  862. select HAVE_CLK
  863. select ARCH_REQUIRE_GPIOLIB
  864. select ARCH_HAS_CPUFREQ
  865. select CLKSRC_MMIO
  866. select GENERIC_CLOCKEVENTS
  867. select ARCH_HAS_HOLES_MEMORYMODEL
  868. help
  869. Support for TI's OMAP platform (OMAP1/2/3/4).
  870. config PLAT_SPEAR
  871. bool "ST SPEAr"
  872. select ARM_AMBA
  873. select ARCH_REQUIRE_GPIOLIB
  874. select CLKDEV_LOOKUP
  875. select COMMON_CLK
  876. select CLKSRC_MMIO
  877. select GENERIC_CLOCKEVENTS
  878. select HAVE_CLK
  879. help
  880. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  881. config ARCH_VT8500
  882. bool "VIA/WonderMedia 85xx"
  883. select CPU_ARM926T
  884. select GENERIC_GPIO
  885. select ARCH_HAS_CPUFREQ
  886. select GENERIC_CLOCKEVENTS
  887. select ARCH_REQUIRE_GPIOLIB
  888. help
  889. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  890. config ARCH_ZYNQ
  891. bool "Xilinx Zynq ARM Cortex A9 Platform"
  892. select CPU_V7
  893. select GENERIC_CLOCKEVENTS
  894. select CLKDEV_LOOKUP
  895. select ARM_GIC
  896. select ARM_AMBA
  897. select ICST
  898. select MIGHT_HAVE_CACHE_L2X0
  899. select USE_OF
  900. help
  901. Support for Xilinx Zynq ARM Cortex A9 Platform
  902. endchoice
  903. #
  904. # This is sorted alphabetically by mach-* pathname. However, plat-*
  905. # Kconfigs may be included either alphabetically (according to the
  906. # plat- suffix) or along side the corresponding mach-* source.
  907. #
  908. source "arch/arm/mach-mvebu/Kconfig"
  909. source "arch/arm/mach-at91/Kconfig"
  910. source "arch/arm/mach-bcmring/Kconfig"
  911. source "arch/arm/mach-clps711x/Kconfig"
  912. source "arch/arm/mach-cns3xxx/Kconfig"
  913. source "arch/arm/mach-davinci/Kconfig"
  914. source "arch/arm/mach-dove/Kconfig"
  915. source "arch/arm/mach-ep93xx/Kconfig"
  916. source "arch/arm/mach-footbridge/Kconfig"
  917. source "arch/arm/mach-gemini/Kconfig"
  918. source "arch/arm/mach-h720x/Kconfig"
  919. source "arch/arm/mach-integrator/Kconfig"
  920. source "arch/arm/mach-iop32x/Kconfig"
  921. source "arch/arm/mach-iop33x/Kconfig"
  922. source "arch/arm/mach-iop13xx/Kconfig"
  923. source "arch/arm/mach-ixp4xx/Kconfig"
  924. source "arch/arm/mach-kirkwood/Kconfig"
  925. source "arch/arm/mach-ks8695/Kconfig"
  926. source "arch/arm/mach-msm/Kconfig"
  927. source "arch/arm/mach-mv78xx0/Kconfig"
  928. source "arch/arm/plat-mxc/Kconfig"
  929. source "arch/arm/mach-mxs/Kconfig"
  930. source "arch/arm/mach-netx/Kconfig"
  931. source "arch/arm/mach-nomadik/Kconfig"
  932. source "arch/arm/plat-nomadik/Kconfig"
  933. source "arch/arm/plat-omap/Kconfig"
  934. source "arch/arm/mach-omap1/Kconfig"
  935. source "arch/arm/mach-omap2/Kconfig"
  936. source "arch/arm/mach-orion5x/Kconfig"
  937. source "arch/arm/mach-pxa/Kconfig"
  938. source "arch/arm/plat-pxa/Kconfig"
  939. source "arch/arm/mach-mmp/Kconfig"
  940. source "arch/arm/mach-realview/Kconfig"
  941. source "arch/arm/mach-sa1100/Kconfig"
  942. source "arch/arm/plat-samsung/Kconfig"
  943. source "arch/arm/plat-s3c24xx/Kconfig"
  944. source "arch/arm/plat-spear/Kconfig"
  945. source "arch/arm/mach-s3c24xx/Kconfig"
  946. if ARCH_S3C24XX
  947. source "arch/arm/mach-s3c2412/Kconfig"
  948. source "arch/arm/mach-s3c2440/Kconfig"
  949. endif
  950. if ARCH_S3C64XX
  951. source "arch/arm/mach-s3c64xx/Kconfig"
  952. endif
  953. source "arch/arm/mach-s5p64x0/Kconfig"
  954. source "arch/arm/mach-s5pc100/Kconfig"
  955. source "arch/arm/mach-s5pv210/Kconfig"
  956. source "arch/arm/mach-exynos/Kconfig"
  957. source "arch/arm/mach-shmobile/Kconfig"
  958. source "arch/arm/mach-prima2/Kconfig"
  959. source "arch/arm/mach-tegra/Kconfig"
  960. source "arch/arm/mach-u300/Kconfig"
  961. source "arch/arm/mach-ux500/Kconfig"
  962. source "arch/arm/mach-versatile/Kconfig"
  963. source "arch/arm/mach-vexpress/Kconfig"
  964. source "arch/arm/plat-versatile/Kconfig"
  965. source "arch/arm/mach-vt8500/Kconfig"
  966. source "arch/arm/mach-w90x900/Kconfig"
  967. # Definitions to make life easier
  968. config ARCH_ACORN
  969. bool
  970. config PLAT_IOP
  971. bool
  972. select GENERIC_CLOCKEVENTS
  973. config PLAT_ORION
  974. bool
  975. select CLKSRC_MMIO
  976. select GENERIC_IRQ_CHIP
  977. select IRQ_DOMAIN
  978. select COMMON_CLK
  979. config PLAT_PXA
  980. bool
  981. config PLAT_VERSATILE
  982. bool
  983. config ARM_TIMER_SP804
  984. bool
  985. select CLKSRC_MMIO
  986. select HAVE_SCHED_CLOCK
  987. source arch/arm/mm/Kconfig
  988. config ARM_NR_BANKS
  989. int
  990. default 16 if ARCH_EP93XX
  991. default 8
  992. config IWMMXT
  993. bool "Enable iWMMXt support"
  994. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  995. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  996. help
  997. Enable support for iWMMXt context switching at run time if
  998. running on a CPU that supports it.
  999. config XSCALE_PMU
  1000. bool
  1001. depends on CPU_XSCALE
  1002. default y
  1003. config MULTI_IRQ_HANDLER
  1004. bool
  1005. help
  1006. Allow each machine to specify it's own IRQ handler at run time.
  1007. if !MMU
  1008. source "arch/arm/Kconfig-nommu"
  1009. endif
  1010. config ARM_ERRATA_326103
  1011. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1012. depends on CPU_V6
  1013. help
  1014. Executing a SWP instruction to read-only memory does not set bit 11
  1015. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1016. treat the access as a read, preventing a COW from occurring and
  1017. causing the faulting task to livelock.
  1018. config ARM_ERRATA_411920
  1019. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1020. depends on CPU_V6 || CPU_V6K
  1021. help
  1022. Invalidation of the Instruction Cache operation can
  1023. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1024. It does not affect the MPCore. This option enables the ARM Ltd.
  1025. recommended workaround.
  1026. config ARM_ERRATA_430973
  1027. bool "ARM errata: Stale prediction on replaced interworking branch"
  1028. depends on CPU_V7
  1029. help
  1030. This option enables the workaround for the 430973 Cortex-A8
  1031. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1032. interworking branch is replaced with another code sequence at the
  1033. same virtual address, whether due to self-modifying code or virtual
  1034. to physical address re-mapping, Cortex-A8 does not recover from the
  1035. stale interworking branch prediction. This results in Cortex-A8
  1036. executing the new code sequence in the incorrect ARM or Thumb state.
  1037. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1038. and also flushes the branch target cache at every context switch.
  1039. Note that setting specific bits in the ACTLR register may not be
  1040. available in non-secure mode.
  1041. config ARM_ERRATA_458693
  1042. bool "ARM errata: Processor deadlock when a false hazard is created"
  1043. depends on CPU_V7
  1044. help
  1045. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1046. erratum. For very specific sequences of memory operations, it is
  1047. possible for a hazard condition intended for a cache line to instead
  1048. be incorrectly associated with a different cache line. This false
  1049. hazard might then cause a processor deadlock. The workaround enables
  1050. the L1 caching of the NEON accesses and disables the PLD instruction
  1051. in the ACTLR register. Note that setting specific bits in the ACTLR
  1052. register may not be available in non-secure mode.
  1053. config ARM_ERRATA_460075
  1054. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1055. depends on CPU_V7
  1056. help
  1057. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1058. erratum. Any asynchronous access to the L2 cache may encounter a
  1059. situation in which recent store transactions to the L2 cache are lost
  1060. and overwritten with stale memory contents from external memory. The
  1061. workaround disables the write-allocate mode for the L2 cache via the
  1062. ACTLR register. Note that setting specific bits in the ACTLR register
  1063. may not be available in non-secure mode.
  1064. config ARM_ERRATA_742230
  1065. bool "ARM errata: DMB operation may be faulty"
  1066. depends on CPU_V7 && SMP
  1067. help
  1068. This option enables the workaround for the 742230 Cortex-A9
  1069. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1070. between two write operations may not ensure the correct visibility
  1071. ordering of the two writes. This workaround sets a specific bit in
  1072. the diagnostic register of the Cortex-A9 which causes the DMB
  1073. instruction to behave as a DSB, ensuring the correct behaviour of
  1074. the two writes.
  1075. config ARM_ERRATA_742231
  1076. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1077. depends on CPU_V7 && SMP
  1078. help
  1079. This option enables the workaround for the 742231 Cortex-A9
  1080. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1081. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1082. accessing some data located in the same cache line, may get corrupted
  1083. data due to bad handling of the address hazard when the line gets
  1084. replaced from one of the CPUs at the same time as another CPU is
  1085. accessing it. This workaround sets specific bits in the diagnostic
  1086. register of the Cortex-A9 which reduces the linefill issuing
  1087. capabilities of the processor.
  1088. config PL310_ERRATA_588369
  1089. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1090. depends on CACHE_L2X0
  1091. help
  1092. The PL310 L2 cache controller implements three types of Clean &
  1093. Invalidate maintenance operations: by Physical Address
  1094. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1095. They are architecturally defined to behave as the execution of a
  1096. clean operation followed immediately by an invalidate operation,
  1097. both performing to the same memory location. This functionality
  1098. is not correctly implemented in PL310 as clean lines are not
  1099. invalidated as a result of these operations.
  1100. config ARM_ERRATA_720789
  1101. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1102. depends on CPU_V7
  1103. help
  1104. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1105. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1106. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1107. As a consequence of this erratum, some TLB entries which should be
  1108. invalidated are not, resulting in an incoherency in the system page
  1109. tables. The workaround changes the TLB flushing routines to invalidate
  1110. entries regardless of the ASID.
  1111. config PL310_ERRATA_727915
  1112. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1113. depends on CACHE_L2X0
  1114. help
  1115. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1116. operation (offset 0x7FC). This operation runs in background so that
  1117. PL310 can handle normal accesses while it is in progress. Under very
  1118. rare circumstances, due to this erratum, write data can be lost when
  1119. PL310 treats a cacheable write transaction during a Clean &
  1120. Invalidate by Way operation.
  1121. config ARM_ERRATA_743622
  1122. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1123. depends on CPU_V7
  1124. help
  1125. This option enables the workaround for the 743622 Cortex-A9
  1126. (r2p*) erratum. Under very rare conditions, a faulty
  1127. optimisation in the Cortex-A9 Store Buffer may lead to data
  1128. corruption. This workaround sets a specific bit in the diagnostic
  1129. register of the Cortex-A9 which disables the Store Buffer
  1130. optimisation, preventing the defect from occurring. This has no
  1131. visible impact on the overall performance or power consumption of the
  1132. processor.
  1133. config ARM_ERRATA_751472
  1134. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1135. depends on CPU_V7
  1136. help
  1137. This option enables the workaround for the 751472 Cortex-A9 (prior
  1138. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1139. completion of a following broadcasted operation if the second
  1140. operation is received by a CPU before the ICIALLUIS has completed,
  1141. potentially leading to corrupted entries in the cache or TLB.
  1142. config PL310_ERRATA_753970
  1143. bool "PL310 errata: cache sync operation may be faulty"
  1144. depends on CACHE_PL310
  1145. help
  1146. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1147. Under some condition the effect of cache sync operation on
  1148. the store buffer still remains when the operation completes.
  1149. This means that the store buffer is always asked to drain and
  1150. this prevents it from merging any further writes. The workaround
  1151. is to replace the normal offset of cache sync operation (0x730)
  1152. by another offset targeting an unmapped PL310 register 0x740.
  1153. This has the same effect as the cache sync operation: store buffer
  1154. drain and waiting for all buffers empty.
  1155. config ARM_ERRATA_754322
  1156. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1157. depends on CPU_V7
  1158. help
  1159. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1160. r3p*) erratum. A speculative memory access may cause a page table walk
  1161. which starts prior to an ASID switch but completes afterwards. This
  1162. can populate the micro-TLB with a stale entry which may be hit with
  1163. the new ASID. This workaround places two dsb instructions in the mm
  1164. switching code so that no page table walks can cross the ASID switch.
  1165. config ARM_ERRATA_754327
  1166. bool "ARM errata: no automatic Store Buffer drain"
  1167. depends on CPU_V7 && SMP
  1168. help
  1169. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1170. r2p0) erratum. The Store Buffer does not have any automatic draining
  1171. mechanism and therefore a livelock may occur if an external agent
  1172. continuously polls a memory location waiting to observe an update.
  1173. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1174. written polling loops from denying visibility of updates to memory.
  1175. config ARM_ERRATA_364296
  1176. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1177. depends on CPU_V6 && !SMP
  1178. help
  1179. This options enables the workaround for the 364296 ARM1136
  1180. r0p2 erratum (possible cache data corruption with
  1181. hit-under-miss enabled). It sets the undocumented bit 31 in
  1182. the auxiliary control register and the FI bit in the control
  1183. register, thus disabling hit-under-miss without putting the
  1184. processor into full low interrupt latency mode. ARM11MPCore
  1185. is not affected.
  1186. config ARM_ERRATA_764369
  1187. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1188. depends on CPU_V7 && SMP
  1189. help
  1190. This option enables the workaround for erratum 764369
  1191. affecting Cortex-A9 MPCore with two or more processors (all
  1192. current revisions). Under certain timing circumstances, a data
  1193. cache line maintenance operation by MVA targeting an Inner
  1194. Shareable memory region may fail to proceed up to either the
  1195. Point of Coherency or to the Point of Unification of the
  1196. system. This workaround adds a DSB instruction before the
  1197. relevant cache maintenance functions and sets a specific bit
  1198. in the diagnostic control register of the SCU.
  1199. config PL310_ERRATA_769419
  1200. bool "PL310 errata: no automatic Store Buffer drain"
  1201. depends on CACHE_L2X0
  1202. help
  1203. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1204. not automatically drain. This can cause normal, non-cacheable
  1205. writes to be retained when the memory system is idle, leading
  1206. to suboptimal I/O performance for drivers using coherent DMA.
  1207. This option adds a write barrier to the cpu_idle loop so that,
  1208. on systems with an outer cache, the store buffer is drained
  1209. explicitly.
  1210. endmenu
  1211. source "arch/arm/common/Kconfig"
  1212. menu "Bus support"
  1213. config ARM_AMBA
  1214. bool
  1215. config ISA
  1216. bool
  1217. help
  1218. Find out whether you have ISA slots on your motherboard. ISA is the
  1219. name of a bus system, i.e. the way the CPU talks to the other stuff
  1220. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1221. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1222. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1223. # Select ISA DMA controller support
  1224. config ISA_DMA
  1225. bool
  1226. select ISA_DMA_API
  1227. # Select ISA DMA interface
  1228. config ISA_DMA_API
  1229. bool
  1230. config PCI
  1231. bool "PCI support" if MIGHT_HAVE_PCI
  1232. help
  1233. Find out whether you have a PCI motherboard. PCI is the name of a
  1234. bus system, i.e. the way the CPU talks to the other stuff inside
  1235. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1236. VESA. If you have PCI, say Y, otherwise N.
  1237. config PCI_DOMAINS
  1238. bool
  1239. depends on PCI
  1240. config PCI_NANOENGINE
  1241. bool "BSE nanoEngine PCI support"
  1242. depends on SA1100_NANOENGINE
  1243. help
  1244. Enable PCI on the BSE nanoEngine board.
  1245. config PCI_SYSCALL
  1246. def_bool PCI
  1247. # Select the host bridge type
  1248. config PCI_HOST_VIA82C505
  1249. bool
  1250. depends on PCI && ARCH_SHARK
  1251. default y
  1252. config PCI_HOST_ITE8152
  1253. bool
  1254. depends on PCI && MACH_ARMCORE
  1255. default y
  1256. select DMABOUNCE
  1257. source "drivers/pci/Kconfig"
  1258. source "drivers/pcmcia/Kconfig"
  1259. endmenu
  1260. menu "Kernel Features"
  1261. config HAVE_SMP
  1262. bool
  1263. help
  1264. This option should be selected by machines which have an SMP-
  1265. capable CPU.
  1266. The only effect of this option is to make the SMP-related
  1267. options available to the user for configuration.
  1268. config SMP
  1269. bool "Symmetric Multi-Processing"
  1270. depends on CPU_V6K || CPU_V7
  1271. depends on GENERIC_CLOCKEVENTS
  1272. depends on HAVE_SMP
  1273. depends on MMU
  1274. select USE_GENERIC_SMP_HELPERS
  1275. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1276. help
  1277. This enables support for systems with more than one CPU. If you have
  1278. a system with only one CPU, like most personal computers, say N. If
  1279. you have a system with more than one CPU, say Y.
  1280. If you say N here, the kernel will run on single and multiprocessor
  1281. machines, but will use only one CPU of a multiprocessor machine. If
  1282. you say Y here, the kernel will run on many, but not all, single
  1283. processor machines. On a single processor machine, the kernel will
  1284. run faster if you say N here.
  1285. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1286. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1287. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1288. If you don't know what to do here, say N.
  1289. config SMP_ON_UP
  1290. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1291. depends on EXPERIMENTAL
  1292. depends on SMP && !XIP_KERNEL
  1293. default y
  1294. help
  1295. SMP kernels contain instructions which fail on non-SMP processors.
  1296. Enabling this option allows the kernel to modify itself to make
  1297. these instructions safe. Disabling it allows about 1K of space
  1298. savings.
  1299. If you don't know what to do here, say Y.
  1300. config ARM_CPU_TOPOLOGY
  1301. bool "Support cpu topology definition"
  1302. depends on SMP && CPU_V7
  1303. default y
  1304. help
  1305. Support ARM cpu topology definition. The MPIDR register defines
  1306. affinity between processors which is then used to describe the cpu
  1307. topology of an ARM System.
  1308. config SCHED_MC
  1309. bool "Multi-core scheduler support"
  1310. depends on ARM_CPU_TOPOLOGY
  1311. help
  1312. Multi-core scheduler support improves the CPU scheduler's decision
  1313. making when dealing with multi-core CPU chips at a cost of slightly
  1314. increased overhead in some places. If unsure say N here.
  1315. config SCHED_SMT
  1316. bool "SMT scheduler support"
  1317. depends on ARM_CPU_TOPOLOGY
  1318. help
  1319. Improves the CPU scheduler's decision making when dealing with
  1320. MultiThreading at a cost of slightly increased overhead in some
  1321. places. If unsure say N here.
  1322. config HAVE_ARM_SCU
  1323. bool
  1324. help
  1325. This option enables support for the ARM system coherency unit
  1326. config ARM_ARCH_TIMER
  1327. bool "Architected timer support"
  1328. depends on CPU_V7
  1329. help
  1330. This option enables support for the ARM architected timer
  1331. config HAVE_ARM_TWD
  1332. bool
  1333. depends on SMP
  1334. help
  1335. This options enables support for the ARM timer and watchdog unit
  1336. choice
  1337. prompt "Memory split"
  1338. default VMSPLIT_3G
  1339. help
  1340. Select the desired split between kernel and user memory.
  1341. If you are not absolutely sure what you are doing, leave this
  1342. option alone!
  1343. config VMSPLIT_3G
  1344. bool "3G/1G user/kernel split"
  1345. config VMSPLIT_2G
  1346. bool "2G/2G user/kernel split"
  1347. config VMSPLIT_1G
  1348. bool "1G/3G user/kernel split"
  1349. endchoice
  1350. config PAGE_OFFSET
  1351. hex
  1352. default 0x40000000 if VMSPLIT_1G
  1353. default 0x80000000 if VMSPLIT_2G
  1354. default 0xC0000000
  1355. config NR_CPUS
  1356. int "Maximum number of CPUs (2-32)"
  1357. range 2 32
  1358. depends on SMP
  1359. default "4"
  1360. config HOTPLUG_CPU
  1361. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1362. depends on SMP && HOTPLUG && EXPERIMENTAL
  1363. help
  1364. Say Y here to experiment with turning CPUs off and on. CPUs
  1365. can be controlled through /sys/devices/system/cpu.
  1366. config LOCAL_TIMERS
  1367. bool "Use local timer interrupts"
  1368. depends on SMP
  1369. default y
  1370. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1371. help
  1372. Enable support for local timers on SMP platforms, rather then the
  1373. legacy IPI broadcast method. Local timers allows the system
  1374. accounting to be spread across the timer interval, preventing a
  1375. "thundering herd" at every timer tick.
  1376. config ARCH_NR_GPIO
  1377. int
  1378. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1379. default 355 if ARCH_U8500
  1380. default 264 if MACH_H4700
  1381. default 512 if SOC_OMAP5
  1382. default 0
  1383. help
  1384. Maximum number of GPIOs in the system.
  1385. If unsure, leave the default value.
  1386. source kernel/Kconfig.preempt
  1387. config HZ
  1388. int
  1389. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1390. ARCH_S5PV210 || ARCH_EXYNOS4
  1391. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1392. default AT91_TIMER_HZ if ARCH_AT91
  1393. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1394. default 100
  1395. config THUMB2_KERNEL
  1396. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1397. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1398. select AEABI
  1399. select ARM_ASM_UNIFIED
  1400. select ARM_UNWIND
  1401. help
  1402. By enabling this option, the kernel will be compiled in
  1403. Thumb-2 mode. A compiler/assembler that understand the unified
  1404. ARM-Thumb syntax is needed.
  1405. If unsure, say N.
  1406. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1407. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1408. depends on THUMB2_KERNEL && MODULES
  1409. default y
  1410. help
  1411. Various binutils versions can resolve Thumb-2 branches to
  1412. locally-defined, preemptible global symbols as short-range "b.n"
  1413. branch instructions.
  1414. This is a problem, because there's no guarantee the final
  1415. destination of the symbol, or any candidate locations for a
  1416. trampoline, are within range of the branch. For this reason, the
  1417. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1418. relocation in modules at all, and it makes little sense to add
  1419. support.
  1420. The symptom is that the kernel fails with an "unsupported
  1421. relocation" error when loading some modules.
  1422. Until fixed tools are available, passing
  1423. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1424. code which hits this problem, at the cost of a bit of extra runtime
  1425. stack usage in some cases.
  1426. The problem is described in more detail at:
  1427. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1428. Only Thumb-2 kernels are affected.
  1429. Unless you are sure your tools don't have this problem, say Y.
  1430. config ARM_ASM_UNIFIED
  1431. bool
  1432. config AEABI
  1433. bool "Use the ARM EABI to compile the kernel"
  1434. help
  1435. This option allows for the kernel to be compiled using the latest
  1436. ARM ABI (aka EABI). This is only useful if you are using a user
  1437. space environment that is also compiled with EABI.
  1438. Since there are major incompatibilities between the legacy ABI and
  1439. EABI, especially with regard to structure member alignment, this
  1440. option also changes the kernel syscall calling convention to
  1441. disambiguate both ABIs and allow for backward compatibility support
  1442. (selected with CONFIG_OABI_COMPAT).
  1443. To use this you need GCC version 4.0.0 or later.
  1444. config OABI_COMPAT
  1445. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1446. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1447. default y
  1448. help
  1449. This option preserves the old syscall interface along with the
  1450. new (ARM EABI) one. It also provides a compatibility layer to
  1451. intercept syscalls that have structure arguments which layout
  1452. in memory differs between the legacy ABI and the new ARM EABI
  1453. (only for non "thumb" binaries). This option adds a tiny
  1454. overhead to all syscalls and produces a slightly larger kernel.
  1455. If you know you'll be using only pure EABI user space then you
  1456. can say N here. If this option is not selected and you attempt
  1457. to execute a legacy ABI binary then the result will be
  1458. UNPREDICTABLE (in fact it can be predicted that it won't work
  1459. at all). If in doubt say Y.
  1460. config ARCH_HAS_HOLES_MEMORYMODEL
  1461. bool
  1462. config ARCH_SPARSEMEM_ENABLE
  1463. bool
  1464. config ARCH_SPARSEMEM_DEFAULT
  1465. def_bool ARCH_SPARSEMEM_ENABLE
  1466. config ARCH_SELECT_MEMORY_MODEL
  1467. def_bool ARCH_SPARSEMEM_ENABLE
  1468. config HAVE_ARCH_PFN_VALID
  1469. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1470. config HIGHMEM
  1471. bool "High Memory Support"
  1472. depends on MMU
  1473. help
  1474. The address space of ARM processors is only 4 Gigabytes large
  1475. and it has to accommodate user address space, kernel address
  1476. space as well as some memory mapped IO. That means that, if you
  1477. have a large amount of physical memory and/or IO, not all of the
  1478. memory can be "permanently mapped" by the kernel. The physical
  1479. memory that is not permanently mapped is called "high memory".
  1480. Depending on the selected kernel/user memory split, minimum
  1481. vmalloc space and actual amount of RAM, you may not need this
  1482. option which should result in a slightly faster kernel.
  1483. If unsure, say n.
  1484. config HIGHPTE
  1485. bool "Allocate 2nd-level pagetables from highmem"
  1486. depends on HIGHMEM
  1487. config HW_PERF_EVENTS
  1488. bool "Enable hardware performance counter support for perf events"
  1489. depends on PERF_EVENTS
  1490. default y
  1491. help
  1492. Enable hardware performance counter support for perf events. If
  1493. disabled, perf events will use software events only.
  1494. source "mm/Kconfig"
  1495. config FORCE_MAX_ZONEORDER
  1496. int "Maximum zone order" if ARCH_SHMOBILE
  1497. range 11 64 if ARCH_SHMOBILE
  1498. default "9" if SA1111
  1499. default "11"
  1500. help
  1501. The kernel memory allocator divides physically contiguous memory
  1502. blocks into "zones", where each zone is a power of two number of
  1503. pages. This option selects the largest power of two that the kernel
  1504. keeps in the memory allocator. If you need to allocate very large
  1505. blocks of physically contiguous memory, then you may need to
  1506. increase this value.
  1507. This config option is actually maximum order plus one. For example,
  1508. a value of 11 means that the largest free memory block is 2^10 pages.
  1509. config LEDS
  1510. bool "Timer and CPU usage LEDs"
  1511. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1512. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1513. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1514. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1515. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1516. ARCH_AT91 || ARCH_DAVINCI || \
  1517. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1518. help
  1519. If you say Y here, the LEDs on your machine will be used
  1520. to provide useful information about your current system status.
  1521. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1522. be able to select which LEDs are active using the options below. If
  1523. you are compiling a kernel for the EBSA-110 or the LART however, the
  1524. red LED will simply flash regularly to indicate that the system is
  1525. still functional. It is safe to say Y here if you have a CATS
  1526. system, but the driver will do nothing.
  1527. config LEDS_TIMER
  1528. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1529. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1530. || MACH_OMAP_PERSEUS2
  1531. depends on LEDS
  1532. depends on !GENERIC_CLOCKEVENTS
  1533. default y if ARCH_EBSA110
  1534. help
  1535. If you say Y here, one of the system LEDs (the green one on the
  1536. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1537. will flash regularly to indicate that the system is still
  1538. operational. This is mainly useful to kernel hackers who are
  1539. debugging unstable kernels.
  1540. The LART uses the same LED for both Timer LED and CPU usage LED
  1541. functions. You may choose to use both, but the Timer LED function
  1542. will overrule the CPU usage LED.
  1543. config LEDS_CPU
  1544. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1545. !ARCH_OMAP) \
  1546. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1547. || MACH_OMAP_PERSEUS2
  1548. depends on LEDS
  1549. help
  1550. If you say Y here, the red LED will be used to give a good real
  1551. time indication of CPU usage, by lighting whenever the idle task
  1552. is not currently executing.
  1553. The LART uses the same LED for both Timer LED and CPU usage LED
  1554. functions. You may choose to use both, but the Timer LED function
  1555. will overrule the CPU usage LED.
  1556. config ALIGNMENT_TRAP
  1557. bool
  1558. depends on CPU_CP15_MMU
  1559. default y if !ARCH_EBSA110
  1560. select HAVE_PROC_CPU if PROC_FS
  1561. help
  1562. ARM processors cannot fetch/store information which is not
  1563. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1564. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1565. fetch/store instructions will be emulated in software if you say
  1566. here, which has a severe performance impact. This is necessary for
  1567. correct operation of some network protocols. With an IP-only
  1568. configuration it is safe to say N, otherwise say Y.
  1569. config UACCESS_WITH_MEMCPY
  1570. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1571. depends on MMU && EXPERIMENTAL
  1572. default y if CPU_FEROCEON
  1573. help
  1574. Implement faster copy_to_user and clear_user methods for CPU
  1575. cores where a 8-word STM instruction give significantly higher
  1576. memory write throughput than a sequence of individual 32bit stores.
  1577. A possible side effect is a slight increase in scheduling latency
  1578. between threads sharing the same address space if they invoke
  1579. such copy operations with large buffers.
  1580. However, if the CPU data cache is using a write-allocate mode,
  1581. this option is unlikely to provide any performance gain.
  1582. config SECCOMP
  1583. bool
  1584. prompt "Enable seccomp to safely compute untrusted bytecode"
  1585. ---help---
  1586. This kernel feature is useful for number crunching applications
  1587. that may need to compute untrusted bytecode during their
  1588. execution. By using pipes or other transports made available to
  1589. the process as file descriptors supporting the read/write
  1590. syscalls, it's possible to isolate those applications in
  1591. their own address space using seccomp. Once seccomp is
  1592. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1593. and the task is only allowed to execute a few safe syscalls
  1594. defined by each seccomp mode.
  1595. config CC_STACKPROTECTOR
  1596. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1597. depends on EXPERIMENTAL
  1598. help
  1599. This option turns on the -fstack-protector GCC feature. This
  1600. feature puts, at the beginning of functions, a canary value on
  1601. the stack just before the return address, and validates
  1602. the value just before actually returning. Stack based buffer
  1603. overflows (that need to overwrite this return address) now also
  1604. overwrite the canary, which gets detected and the attack is then
  1605. neutralized via a kernel panic.
  1606. This feature requires gcc version 4.2 or above.
  1607. config DEPRECATED_PARAM_STRUCT
  1608. bool "Provide old way to pass kernel parameters"
  1609. help
  1610. This was deprecated in 2001 and announced to live on for 5 years.
  1611. Some old boot loaders still use this way.
  1612. endmenu
  1613. menu "Boot options"
  1614. config USE_OF
  1615. bool "Flattened Device Tree support"
  1616. select OF
  1617. select OF_EARLY_FLATTREE
  1618. select IRQ_DOMAIN
  1619. help
  1620. Include support for flattened device tree machine descriptions.
  1621. # Compressed boot loader in ROM. Yes, we really want to ask about
  1622. # TEXT and BSS so we preserve their values in the config files.
  1623. config ZBOOT_ROM_TEXT
  1624. hex "Compressed ROM boot loader base address"
  1625. default "0"
  1626. help
  1627. The physical address at which the ROM-able zImage is to be
  1628. placed in the target. Platforms which normally make use of
  1629. ROM-able zImage formats normally set this to a suitable
  1630. value in their defconfig file.
  1631. If ZBOOT_ROM is not enabled, this has no effect.
  1632. config ZBOOT_ROM_BSS
  1633. hex "Compressed ROM boot loader BSS address"
  1634. default "0"
  1635. help
  1636. The base address of an area of read/write memory in the target
  1637. for the ROM-able zImage which must be available while the
  1638. decompressor is running. It must be large enough to hold the
  1639. entire decompressed kernel plus an additional 128 KiB.
  1640. Platforms which normally make use of ROM-able zImage formats
  1641. normally set this to a suitable value in their defconfig file.
  1642. If ZBOOT_ROM is not enabled, this has no effect.
  1643. config ZBOOT_ROM
  1644. bool "Compressed boot loader in ROM/flash"
  1645. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1646. help
  1647. Say Y here if you intend to execute your compressed kernel image
  1648. (zImage) directly from ROM or flash. If unsure, say N.
  1649. choice
  1650. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1651. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1652. default ZBOOT_ROM_NONE
  1653. help
  1654. Include experimental SD/MMC loading code in the ROM-able zImage.
  1655. With this enabled it is possible to write the ROM-able zImage
  1656. kernel image to an MMC or SD card and boot the kernel straight
  1657. from the reset vector. At reset the processor Mask ROM will load
  1658. the first part of the ROM-able zImage which in turn loads the
  1659. rest the kernel image to RAM.
  1660. config ZBOOT_ROM_NONE
  1661. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1662. help
  1663. Do not load image from SD or MMC
  1664. config ZBOOT_ROM_MMCIF
  1665. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1666. help
  1667. Load image from MMCIF hardware block.
  1668. config ZBOOT_ROM_SH_MOBILE_SDHI
  1669. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1670. help
  1671. Load image from SDHI hardware block
  1672. endchoice
  1673. config ARM_APPENDED_DTB
  1674. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1675. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1676. help
  1677. With this option, the boot code will look for a device tree binary
  1678. (DTB) appended to zImage
  1679. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1680. This is meant as a backward compatibility convenience for those
  1681. systems with a bootloader that can't be upgraded to accommodate
  1682. the documented boot protocol using a device tree.
  1683. Beware that there is very little in terms of protection against
  1684. this option being confused by leftover garbage in memory that might
  1685. look like a DTB header after a reboot if no actual DTB is appended
  1686. to zImage. Do not leave this option active in a production kernel
  1687. if you don't intend to always append a DTB. Proper passing of the
  1688. location into r2 of a bootloader provided DTB is always preferable
  1689. to this option.
  1690. config ARM_ATAG_DTB_COMPAT
  1691. bool "Supplement the appended DTB with traditional ATAG information"
  1692. depends on ARM_APPENDED_DTB
  1693. help
  1694. Some old bootloaders can't be updated to a DTB capable one, yet
  1695. they provide ATAGs with memory configuration, the ramdisk address,
  1696. the kernel cmdline string, etc. Such information is dynamically
  1697. provided by the bootloader and can't always be stored in a static
  1698. DTB. To allow a device tree enabled kernel to be used with such
  1699. bootloaders, this option allows zImage to extract the information
  1700. from the ATAG list and store it at run time into the appended DTB.
  1701. choice
  1702. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1703. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1704. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1705. bool "Use bootloader kernel arguments if available"
  1706. help
  1707. Uses the command-line options passed by the boot loader instead of
  1708. the device tree bootargs property. If the boot loader doesn't provide
  1709. any, the device tree bootargs property will be used.
  1710. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1711. bool "Extend with bootloader kernel arguments"
  1712. help
  1713. The command-line arguments provided by the boot loader will be
  1714. appended to the the device tree bootargs property.
  1715. endchoice
  1716. config CMDLINE
  1717. string "Default kernel command string"
  1718. default ""
  1719. help
  1720. On some architectures (EBSA110 and CATS), there is currently no way
  1721. for the boot loader to pass arguments to the kernel. For these
  1722. architectures, you should supply some command-line options at build
  1723. time by entering them here. As a minimum, you should specify the
  1724. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1725. choice
  1726. prompt "Kernel command line type" if CMDLINE != ""
  1727. default CMDLINE_FROM_BOOTLOADER
  1728. config CMDLINE_FROM_BOOTLOADER
  1729. bool "Use bootloader kernel arguments if available"
  1730. help
  1731. Uses the command-line options passed by the boot loader. If
  1732. the boot loader doesn't provide any, the default kernel command
  1733. string provided in CMDLINE will be used.
  1734. config CMDLINE_EXTEND
  1735. bool "Extend bootloader kernel arguments"
  1736. help
  1737. The command-line arguments provided by the boot loader will be
  1738. appended to the default kernel command string.
  1739. config CMDLINE_FORCE
  1740. bool "Always use the default kernel command string"
  1741. help
  1742. Always use the default kernel command string, even if the boot
  1743. loader passes other arguments to the kernel.
  1744. This is useful if you cannot or don't want to change the
  1745. command-line options your boot loader passes to the kernel.
  1746. endchoice
  1747. config XIP_KERNEL
  1748. bool "Kernel Execute-In-Place from ROM"
  1749. depends on !ZBOOT_ROM && !ARM_LPAE
  1750. help
  1751. Execute-In-Place allows the kernel to run from non-volatile storage
  1752. directly addressable by the CPU, such as NOR flash. This saves RAM
  1753. space since the text section of the kernel is not loaded from flash
  1754. to RAM. Read-write sections, such as the data section and stack,
  1755. are still copied to RAM. The XIP kernel is not compressed since
  1756. it has to run directly from flash, so it will take more space to
  1757. store it. The flash address used to link the kernel object files,
  1758. and for storing it, is configuration dependent. Therefore, if you
  1759. say Y here, you must know the proper physical address where to
  1760. store the kernel image depending on your own flash memory usage.
  1761. Also note that the make target becomes "make xipImage" rather than
  1762. "make zImage" or "make Image". The final kernel binary to put in
  1763. ROM memory will be arch/arm/boot/xipImage.
  1764. If unsure, say N.
  1765. config XIP_PHYS_ADDR
  1766. hex "XIP Kernel Physical Location"
  1767. depends on XIP_KERNEL
  1768. default "0x00080000"
  1769. help
  1770. This is the physical address in your flash memory the kernel will
  1771. be linked for and stored to. This address is dependent on your
  1772. own flash usage.
  1773. config KEXEC
  1774. bool "Kexec system call (EXPERIMENTAL)"
  1775. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1776. help
  1777. kexec is a system call that implements the ability to shutdown your
  1778. current kernel, and to start another kernel. It is like a reboot
  1779. but it is independent of the system firmware. And like a reboot
  1780. you can start any kernel with it, not just Linux.
  1781. It is an ongoing process to be certain the hardware in a machine
  1782. is properly shutdown, so do not be surprised if this code does not
  1783. initially work for you. It may help to enable device hotplugging
  1784. support.
  1785. config ATAGS_PROC
  1786. bool "Export atags in procfs"
  1787. depends on KEXEC
  1788. default y
  1789. help
  1790. Should the atags used to boot the kernel be exported in an "atags"
  1791. file in procfs. Useful with kexec.
  1792. config CRASH_DUMP
  1793. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1794. depends on EXPERIMENTAL
  1795. help
  1796. Generate crash dump after being started by kexec. This should
  1797. be normally only set in special crash dump kernels which are
  1798. loaded in the main kernel with kexec-tools into a specially
  1799. reserved region and then later executed after a crash by
  1800. kdump/kexec. The crash dump kernel must be compiled to a
  1801. memory address not used by the main kernel
  1802. For more details see Documentation/kdump/kdump.txt
  1803. config AUTO_ZRELADDR
  1804. bool "Auto calculation of the decompressed kernel image address"
  1805. depends on !ZBOOT_ROM && !ARCH_U300
  1806. help
  1807. ZRELADDR is the physical address where the decompressed kernel
  1808. image will be placed. If AUTO_ZRELADDR is selected, the address
  1809. will be determined at run-time by masking the current IP with
  1810. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1811. from start of memory.
  1812. endmenu
  1813. menu "CPU Power Management"
  1814. if ARCH_HAS_CPUFREQ
  1815. source "drivers/cpufreq/Kconfig"
  1816. config CPU_FREQ_IMX
  1817. tristate "CPUfreq driver for i.MX CPUs"
  1818. depends on ARCH_MXC && CPU_FREQ
  1819. help
  1820. This enables the CPUfreq driver for i.MX CPUs.
  1821. config CPU_FREQ_SA1100
  1822. bool
  1823. config CPU_FREQ_SA1110
  1824. bool
  1825. config CPU_FREQ_INTEGRATOR
  1826. tristate "CPUfreq driver for ARM Integrator CPUs"
  1827. depends on ARCH_INTEGRATOR && CPU_FREQ
  1828. default y
  1829. help
  1830. This enables the CPUfreq driver for ARM Integrator CPUs.
  1831. For details, take a look at <file:Documentation/cpu-freq>.
  1832. If in doubt, say Y.
  1833. config CPU_FREQ_PXA
  1834. bool
  1835. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1836. default y
  1837. select CPU_FREQ_TABLE
  1838. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1839. config CPU_FREQ_S3C
  1840. bool
  1841. help
  1842. Internal configuration node for common cpufreq on Samsung SoC
  1843. config CPU_FREQ_S3C24XX
  1844. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1845. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1846. select CPU_FREQ_S3C
  1847. help
  1848. This enables the CPUfreq driver for the Samsung S3C24XX family
  1849. of CPUs.
  1850. For details, take a look at <file:Documentation/cpu-freq>.
  1851. If in doubt, say N.
  1852. config CPU_FREQ_S3C24XX_PLL
  1853. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1854. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1855. help
  1856. Compile in support for changing the PLL frequency from the
  1857. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1858. after a frequency change, so by default it is not enabled.
  1859. This also means that the PLL tables for the selected CPU(s) will
  1860. be built which may increase the size of the kernel image.
  1861. config CPU_FREQ_S3C24XX_DEBUG
  1862. bool "Debug CPUfreq Samsung driver core"
  1863. depends on CPU_FREQ_S3C24XX
  1864. help
  1865. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1866. config CPU_FREQ_S3C24XX_IODEBUG
  1867. bool "Debug CPUfreq Samsung driver IO timing"
  1868. depends on CPU_FREQ_S3C24XX
  1869. help
  1870. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1871. config CPU_FREQ_S3C24XX_DEBUGFS
  1872. bool "Export debugfs for CPUFreq"
  1873. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1874. help
  1875. Export status information via debugfs.
  1876. endif
  1877. source "drivers/cpuidle/Kconfig"
  1878. endmenu
  1879. menu "Floating point emulation"
  1880. comment "At least one emulation must be selected"
  1881. config FPE_NWFPE
  1882. bool "NWFPE math emulation"
  1883. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1884. ---help---
  1885. Say Y to include the NWFPE floating point emulator in the kernel.
  1886. This is necessary to run most binaries. Linux does not currently
  1887. support floating point hardware so you need to say Y here even if
  1888. your machine has an FPA or floating point co-processor podule.
  1889. You may say N here if you are going to load the Acorn FPEmulator
  1890. early in the bootup.
  1891. config FPE_NWFPE_XP
  1892. bool "Support extended precision"
  1893. depends on FPE_NWFPE
  1894. help
  1895. Say Y to include 80-bit support in the kernel floating-point
  1896. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1897. Note that gcc does not generate 80-bit operations by default,
  1898. so in most cases this option only enlarges the size of the
  1899. floating point emulator without any good reason.
  1900. You almost surely want to say N here.
  1901. config FPE_FASTFPE
  1902. bool "FastFPE math emulation (EXPERIMENTAL)"
  1903. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1904. ---help---
  1905. Say Y here to include the FAST floating point emulator in the kernel.
  1906. This is an experimental much faster emulator which now also has full
  1907. precision for the mantissa. It does not support any exceptions.
  1908. It is very simple, and approximately 3-6 times faster than NWFPE.
  1909. It should be sufficient for most programs. It may be not suitable
  1910. for scientific calculations, but you have to check this for yourself.
  1911. If you do not feel you need a faster FP emulation you should better
  1912. choose NWFPE.
  1913. config VFP
  1914. bool "VFP-format floating point maths"
  1915. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1916. help
  1917. Say Y to include VFP support code in the kernel. This is needed
  1918. if your hardware includes a VFP unit.
  1919. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1920. release notes and additional status information.
  1921. Say N if your target does not have VFP hardware.
  1922. config VFPv3
  1923. bool
  1924. depends on VFP
  1925. default y if CPU_V7
  1926. config NEON
  1927. bool "Advanced SIMD (NEON) Extension support"
  1928. depends on VFPv3 && CPU_V7
  1929. help
  1930. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1931. Extension.
  1932. endmenu
  1933. menu "Userspace binary formats"
  1934. source "fs/Kconfig.binfmt"
  1935. config ARTHUR
  1936. tristate "RISC OS personality"
  1937. depends on !AEABI
  1938. help
  1939. Say Y here to include the kernel code necessary if you want to run
  1940. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1941. experimental; if this sounds frightening, say N and sleep in peace.
  1942. You can also say M here to compile this support as a module (which
  1943. will be called arthur).
  1944. endmenu
  1945. menu "Power management options"
  1946. source "kernel/power/Kconfig"
  1947. config ARCH_SUSPEND_POSSIBLE
  1948. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1949. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1950. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1951. def_bool y
  1952. config ARM_CPU_SUSPEND
  1953. def_bool PM_SLEEP
  1954. endmenu
  1955. source "net/Kconfig"
  1956. source "drivers/Kconfig"
  1957. source "fs/Kconfig"
  1958. source "arch/arm/Kconfig.debug"
  1959. source "security/Kconfig"
  1960. source "crypto/Kconfig"
  1961. source "lib/Kconfig"