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 GENERIC_IRQ_PROBE
  42. select ARCH_WANT_IPC_PARSE_VERSION
  43. select HARDIRQS_SW_RESEND
  44. select CPU_PM if (SUSPEND || CPU_IDLE)
  45. select GENERIC_PCI_IOMAP
  46. select HAVE_BPF_JIT
  47. select GENERIC_SMP_IDLE_THREAD
  48. select KTIME_SCALAR
  49. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  50. select GENERIC_STRNCPY_FROM_USER
  51. select GENERIC_STRNLEN_USER
  52. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  53. help
  54. The ARM series is a line of low-power-consumption RISC chip designs
  55. licensed by ARM Ltd and targeted at embedded applications and
  56. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  57. manufactured, but legacy ARM-based PC hardware remains popular in
  58. Europe. There is an ARM Linux project with a web page at
  59. <http://www.arm.linux.org.uk/>.
  60. config ARM_HAS_SG_CHAIN
  61. bool
  62. config NEED_SG_DMA_LENGTH
  63. bool
  64. config ARM_DMA_USE_IOMMU
  65. select NEED_SG_DMA_LENGTH
  66. select ARM_HAS_SG_CHAIN
  67. bool
  68. config HAVE_PWM
  69. bool
  70. config MIGHT_HAVE_PCI
  71. bool
  72. config SYS_SUPPORTS_APM_EMULATION
  73. bool
  74. config GENERIC_GPIO
  75. bool
  76. config HAVE_TCM
  77. bool
  78. select GENERIC_ALLOCATOR
  79. config HAVE_PROC_CPU
  80. bool
  81. config NO_IOPORT
  82. bool
  83. config EISA
  84. bool
  85. ---help---
  86. The Extended Industry Standard Architecture (EISA) bus was
  87. developed as an open alternative to the IBM MicroChannel bus.
  88. The EISA bus provided some of the features of the IBM MicroChannel
  89. bus while maintaining backward compatibility with cards made for
  90. the older ISA bus. The EISA bus saw limited use between 1988 and
  91. 1995 when it was made obsolete by the PCI bus.
  92. Say Y here if you are building a kernel for an EISA-based machine.
  93. Otherwise, say N.
  94. config SBUS
  95. bool
  96. config STACKTRACE_SUPPORT
  97. bool
  98. default y
  99. config HAVE_LATENCYTOP_SUPPORT
  100. bool
  101. depends on !SMP
  102. default y
  103. config LOCKDEP_SUPPORT
  104. bool
  105. default y
  106. config TRACE_IRQFLAGS_SUPPORT
  107. bool
  108. default y
  109. config GENERIC_LOCKBREAK
  110. bool
  111. default y
  112. depends on SMP && PREEMPT
  113. config RWSEM_GENERIC_SPINLOCK
  114. bool
  115. default y
  116. config RWSEM_XCHGADD_ALGORITHM
  117. bool
  118. config ARCH_HAS_ILOG2_U32
  119. bool
  120. config ARCH_HAS_ILOG2_U64
  121. bool
  122. config ARCH_HAS_CPUFREQ
  123. bool
  124. help
  125. Internal node to signify that the ARCH has CPUFREQ support
  126. and that the relevant menu configurations are displayed for
  127. it.
  128. config GENERIC_HWEIGHT
  129. bool
  130. default y
  131. config GENERIC_CALIBRATE_DELAY
  132. bool
  133. default y
  134. config ARCH_MAY_HAVE_PC_FDC
  135. bool
  136. config ZONE_DMA
  137. bool
  138. config NEED_DMA_MAP_STATE
  139. def_bool y
  140. config ARCH_HAS_DMA_SET_COHERENT_MASK
  141. bool
  142. config GENERIC_ISA_DMA
  143. bool
  144. config FIQ
  145. bool
  146. config NEED_RET_TO_USER
  147. bool
  148. config ARCH_MTD_XIP
  149. bool
  150. config VECTORS_BASE
  151. hex
  152. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  153. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  154. default 0x00000000
  155. help
  156. The base address of exception vectors.
  157. config ARM_PATCH_PHYS_VIRT
  158. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  159. default y
  160. depends on !XIP_KERNEL && MMU
  161. depends on !ARCH_REALVIEW || !SPARSEMEM
  162. help
  163. Patch phys-to-virt and virt-to-phys translation functions at
  164. boot and module load time according to the position of the
  165. kernel in system memory.
  166. This can only be used with non-XIP MMU kernels where the base
  167. of physical memory is at a 16MB boundary.
  168. Only disable this option if you know that you do not require
  169. this feature (eg, building a kernel for a single machine) and
  170. you need to shrink the kernel to the minimal size.
  171. config NEED_MACH_IO_H
  172. bool
  173. help
  174. Select this when mach/io.h is required to provide special
  175. definitions for this platform. The need for mach/io.h should
  176. be avoided when possible.
  177. config NEED_MACH_MEMORY_H
  178. bool
  179. help
  180. Select this when mach/memory.h is required to provide special
  181. definitions for this platform. The need for mach/memory.h should
  182. be avoided when possible.
  183. config PHYS_OFFSET
  184. hex "Physical address of main memory" if MMU
  185. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  186. default DRAM_BASE if !MMU
  187. help
  188. Please provide the physical address corresponding to the
  189. location of main memory in your system.
  190. config GENERIC_BUG
  191. def_bool y
  192. depends on BUG
  193. source "init/Kconfig"
  194. source "kernel/Kconfig.freezer"
  195. menu "System Type"
  196. config MMU
  197. bool "MMU-based Paged Memory Management Support"
  198. default y
  199. help
  200. Select if you want MMU-based virtualised addressing space
  201. support by paged memory management. If unsure, say 'Y'.
  202. #
  203. # The "ARM system type" choice list is ordered alphabetically by option
  204. # text. Please add new entries in the option alphabetic order.
  205. #
  206. choice
  207. prompt "ARM system type"
  208. default ARCH_VERSATILE
  209. config ARCH_SOCFPGA
  210. bool "Altera SOCFPGA family"
  211. select ARCH_WANT_OPTIONAL_GPIOLIB
  212. select ARM_AMBA
  213. select ARM_GIC
  214. select CACHE_L2X0
  215. select CLKDEV_LOOKUP
  216. select COMMON_CLK
  217. select CPU_V7
  218. select DW_APB_TIMER
  219. select DW_APB_TIMER_OF
  220. select GENERIC_CLOCKEVENTS
  221. select GPIO_PL061 if GPIOLIB
  222. select HAVE_ARM_SCU
  223. select SPARSE_IRQ
  224. select USE_OF
  225. help
  226. This enables support for Altera SOCFPGA Cyclone V platform
  227. config ARCH_INTEGRATOR
  228. bool "ARM Ltd. Integrator family"
  229. select ARM_AMBA
  230. select ARCH_HAS_CPUFREQ
  231. select COMMON_CLK
  232. select CLK_VERSATILE
  233. select HAVE_TCM
  234. select ICST
  235. select GENERIC_CLOCKEVENTS
  236. select PLAT_VERSATILE
  237. select PLAT_VERSATILE_FPGA_IRQ
  238. select NEED_MACH_IO_H
  239. select NEED_MACH_MEMORY_H
  240. select SPARSE_IRQ
  241. select MULTI_IRQ_HANDLER
  242. help
  243. Support for ARM's Integrator platform.
  244. config ARCH_REALVIEW
  245. bool "ARM Ltd. RealView family"
  246. select ARM_AMBA
  247. select CLKDEV_LOOKUP
  248. select HAVE_MACH_CLKDEV
  249. select ICST
  250. select GENERIC_CLOCKEVENTS
  251. select ARCH_WANT_OPTIONAL_GPIOLIB
  252. select PLAT_VERSATILE
  253. select PLAT_VERSATILE_CLOCK
  254. select PLAT_VERSATILE_CLCD
  255. select ARM_TIMER_SP804
  256. select GPIO_PL061 if GPIOLIB
  257. select NEED_MACH_MEMORY_H
  258. help
  259. This enables support for ARM Ltd RealView boards.
  260. config ARCH_VERSATILE
  261. bool "ARM Ltd. Versatile family"
  262. select ARM_AMBA
  263. select ARM_VIC
  264. select CLKDEV_LOOKUP
  265. select HAVE_MACH_CLKDEV
  266. select ICST
  267. select GENERIC_CLOCKEVENTS
  268. select ARCH_WANT_OPTIONAL_GPIOLIB
  269. select NEED_MACH_IO_H if PCI
  270. select PLAT_VERSATILE
  271. select PLAT_VERSATILE_CLOCK
  272. select PLAT_VERSATILE_CLCD
  273. select PLAT_VERSATILE_FPGA_IRQ
  274. select ARM_TIMER_SP804
  275. help
  276. This enables support for ARM Ltd Versatile board.
  277. config ARCH_VEXPRESS
  278. bool "ARM Ltd. Versatile Express family"
  279. select ARCH_WANT_OPTIONAL_GPIOLIB
  280. select ARM_AMBA
  281. select ARM_TIMER_SP804
  282. select CLKDEV_LOOKUP
  283. select COMMON_CLK
  284. select GENERIC_CLOCKEVENTS
  285. select HAVE_CLK
  286. select HAVE_PATA_PLATFORM
  287. select ICST
  288. select NO_IOPORT
  289. select PLAT_VERSATILE
  290. select PLAT_VERSATILE_CLCD
  291. select REGULATOR_FIXED_VOLTAGE if REGULATOR
  292. help
  293. This enables support for the ARM Ltd Versatile Express boards.
  294. config ARCH_AT91
  295. bool "Atmel AT91"
  296. select ARCH_REQUIRE_GPIOLIB
  297. select HAVE_CLK
  298. select CLKDEV_LOOKUP
  299. select IRQ_DOMAIN
  300. select NEED_MACH_IO_H if PCCARD
  301. help
  302. This enables support for systems based on Atmel
  303. AT91RM9200 and AT91SAM9* processors.
  304. config ARCH_HIGHBANK
  305. bool "Calxeda Highbank-based"
  306. select ARCH_WANT_OPTIONAL_GPIOLIB
  307. select ARM_AMBA
  308. select ARM_GIC
  309. select ARM_TIMER_SP804
  310. select CACHE_L2X0
  311. select CLKDEV_LOOKUP
  312. select COMMON_CLK
  313. select CPU_V7
  314. select GENERIC_CLOCKEVENTS
  315. select HAVE_ARM_SCU
  316. select HAVE_SMP
  317. select SPARSE_IRQ
  318. select USE_OF
  319. help
  320. Support for the Calxeda Highbank SoC based boards.
  321. config ARCH_CLPS711X
  322. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  323. select CPU_ARM720T
  324. select ARCH_USES_GETTIMEOFFSET
  325. select NEED_MACH_MEMORY_H
  326. help
  327. Support for Cirrus Logic 711x/721x/731x based boards.
  328. config ARCH_CNS3XXX
  329. bool "Cavium Networks CNS3XXX family"
  330. select CPU_V6K
  331. select GENERIC_CLOCKEVENTS
  332. select ARM_GIC
  333. select MIGHT_HAVE_CACHE_L2X0
  334. select MIGHT_HAVE_PCI
  335. select PCI_DOMAINS if PCI
  336. help
  337. Support for Cavium Networks CNS3XXX platform.
  338. config ARCH_GEMINI
  339. bool "Cortina Systems Gemini"
  340. select CPU_FA526
  341. select ARCH_REQUIRE_GPIOLIB
  342. select ARCH_USES_GETTIMEOFFSET
  343. help
  344. Support for the Cortina Systems Gemini family SoCs
  345. config ARCH_PRIMA2
  346. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  347. select CPU_V7
  348. select NO_IOPORT
  349. select ARCH_REQUIRE_GPIOLIB
  350. select GENERIC_CLOCKEVENTS
  351. select CLKDEV_LOOKUP
  352. select GENERIC_IRQ_CHIP
  353. select MIGHT_HAVE_CACHE_L2X0
  354. select PINCTRL
  355. select PINCTRL_SIRF
  356. select USE_OF
  357. select ZONE_DMA
  358. help
  359. Support for CSR SiRFSoC ARM Cortex A9 Platform
  360. config ARCH_EBSA110
  361. bool "EBSA-110"
  362. select CPU_SA110
  363. select ISA
  364. select NO_IOPORT
  365. select ARCH_USES_GETTIMEOFFSET
  366. select NEED_MACH_IO_H
  367. select NEED_MACH_MEMORY_H
  368. help
  369. This is an evaluation board for the StrongARM processor available
  370. from Digital. It has limited hardware on-board, including an
  371. Ethernet interface, two PCMCIA sockets, two serial ports and a
  372. parallel port.
  373. config ARCH_EP93XX
  374. bool "EP93xx-based"
  375. select CPU_ARM920T
  376. select ARM_AMBA
  377. select ARM_VIC
  378. select CLKDEV_LOOKUP
  379. select ARCH_REQUIRE_GPIOLIB
  380. select ARCH_HAS_HOLES_MEMORYMODEL
  381. select ARCH_USES_GETTIMEOFFSET
  382. select NEED_MACH_MEMORY_H
  383. help
  384. This enables support for the Cirrus EP93xx series of CPUs.
  385. config ARCH_FOOTBRIDGE
  386. bool "FootBridge"
  387. select CPU_SA110
  388. select FOOTBRIDGE
  389. select GENERIC_CLOCKEVENTS
  390. select HAVE_IDE
  391. select NEED_MACH_IO_H
  392. select NEED_MACH_MEMORY_H
  393. help
  394. Support for systems based on the DC21285 companion chip
  395. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  396. config ARCH_MXC
  397. bool "Freescale MXC/iMX-based"
  398. select GENERIC_CLOCKEVENTS
  399. select ARCH_REQUIRE_GPIOLIB
  400. select CLKDEV_LOOKUP
  401. select CLKSRC_MMIO
  402. select GENERIC_IRQ_CHIP
  403. select MULTI_IRQ_HANDLER
  404. select SPARSE_IRQ
  405. select USE_OF
  406. help
  407. Support for Freescale MXC/iMX-based family of processors
  408. config ARCH_MXS
  409. bool "Freescale MXS-based"
  410. select GENERIC_CLOCKEVENTS
  411. select ARCH_REQUIRE_GPIOLIB
  412. select CLKDEV_LOOKUP
  413. select CLKSRC_MMIO
  414. select COMMON_CLK
  415. select HAVE_CLK_PREPARE
  416. select PINCTRL
  417. select USE_OF
  418. help
  419. Support for Freescale MXS-based family of processors
  420. config ARCH_NETX
  421. bool "Hilscher NetX based"
  422. select CLKSRC_MMIO
  423. select CPU_ARM926T
  424. select ARM_VIC
  425. select GENERIC_CLOCKEVENTS
  426. help
  427. This enables support for systems based on the Hilscher NetX Soc
  428. config ARCH_H720X
  429. bool "Hynix HMS720x-based"
  430. select CPU_ARM720T
  431. select ISA_DMA_API
  432. select ARCH_USES_GETTIMEOFFSET
  433. help
  434. This enables support for systems based on the Hynix HMS720x
  435. config ARCH_IOP13XX
  436. bool "IOP13xx-based"
  437. depends on MMU
  438. select CPU_XSC3
  439. select PLAT_IOP
  440. select PCI
  441. select ARCH_SUPPORTS_MSI
  442. select VMSPLIT_1G
  443. select NEED_MACH_IO_H
  444. select NEED_MACH_MEMORY_H
  445. select NEED_RET_TO_USER
  446. help
  447. Support for Intel's IOP13XX (XScale) family of processors.
  448. config ARCH_IOP32X
  449. bool "IOP32x-based"
  450. depends on MMU
  451. select CPU_XSCALE
  452. select NEED_MACH_IO_H
  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_MACH_IO_H
  465. select NEED_RET_TO_USER
  466. select PLAT_IOP
  467. select PCI
  468. select ARCH_REQUIRE_GPIOLIB
  469. help
  470. Support for Intel's IOP33X (XScale) family of processors.
  471. config ARCH_IXP4XX
  472. bool "IXP4xx-based"
  473. depends on MMU
  474. select ARCH_HAS_DMA_SET_COHERENT_MASK
  475. select CLKSRC_MMIO
  476. select CPU_XSCALE
  477. select ARCH_REQUIRE_GPIOLIB
  478. select GENERIC_CLOCKEVENTS
  479. select MIGHT_HAVE_PCI
  480. select NEED_MACH_IO_H
  481. select DMABOUNCE if PCI
  482. help
  483. Support for Intel's IXP4XX (XScale) family of processors.
  484. config ARCH_MVEBU
  485. bool "Marvell SOCs with Device Tree support"
  486. select GENERIC_CLOCKEVENTS
  487. select MULTI_IRQ_HANDLER
  488. select SPARSE_IRQ
  489. select CLKSRC_MMIO
  490. select GENERIC_IRQ_CHIP
  491. select IRQ_DOMAIN
  492. select COMMON_CLK
  493. help
  494. Support for the Marvell SoC Family with device tree support
  495. config ARCH_DOVE
  496. bool "Marvell Dove"
  497. select CPU_V7
  498. select PCI
  499. select ARCH_REQUIRE_GPIOLIB
  500. select GENERIC_CLOCKEVENTS
  501. select NEED_MACH_IO_H
  502. select PLAT_ORION
  503. help
  504. Support for the Marvell Dove SoC 88AP510
  505. config ARCH_KIRKWOOD
  506. bool "Marvell Kirkwood"
  507. select CPU_FEROCEON
  508. select PCI
  509. select ARCH_REQUIRE_GPIOLIB
  510. select GENERIC_CLOCKEVENTS
  511. select NEED_MACH_IO_H
  512. select PLAT_ORION
  513. help
  514. Support for the following Marvell Kirkwood series SoCs:
  515. 88F6180, 88F6192 and 88F6281.
  516. config ARCH_LPC32XX
  517. bool "NXP LPC32XX"
  518. select CLKSRC_MMIO
  519. select CPU_ARM926T
  520. select ARCH_REQUIRE_GPIOLIB
  521. select HAVE_IDE
  522. select ARM_AMBA
  523. select USB_ARCH_HAS_OHCI
  524. select CLKDEV_LOOKUP
  525. select GENERIC_CLOCKEVENTS
  526. select USE_OF
  527. select HAVE_PWM
  528. help
  529. Support for the NXP LPC32XX family of processors
  530. config ARCH_MV78XX0
  531. bool "Marvell MV78xx0"
  532. select CPU_FEROCEON
  533. select PCI
  534. select ARCH_REQUIRE_GPIOLIB
  535. select GENERIC_CLOCKEVENTS
  536. select NEED_MACH_IO_H
  537. select PLAT_ORION
  538. help
  539. Support for the following Marvell MV78xx0 series SoCs:
  540. MV781x0, MV782x0.
  541. config ARCH_ORION5X
  542. bool "Marvell Orion"
  543. depends on MMU
  544. select CPU_FEROCEON
  545. select PCI
  546. select ARCH_REQUIRE_GPIOLIB
  547. select GENERIC_CLOCKEVENTS
  548. select NEED_MACH_IO_H
  549. select PLAT_ORION
  550. help
  551. Support for the following Marvell Orion 5x series SoCs:
  552. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  553. Orion-2 (5281), Orion-1-90 (6183).
  554. config ARCH_MMP
  555. bool "Marvell PXA168/910/MMP2"
  556. depends on MMU
  557. select ARCH_REQUIRE_GPIOLIB
  558. select CLKDEV_LOOKUP
  559. select GENERIC_CLOCKEVENTS
  560. select GPIO_PXA
  561. select IRQ_DOMAIN
  562. select PLAT_PXA
  563. select SPARSE_IRQ
  564. select GENERIC_ALLOCATOR
  565. help
  566. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  567. config ARCH_KS8695
  568. bool "Micrel/Kendin KS8695"
  569. select CPU_ARM922T
  570. select ARCH_REQUIRE_GPIOLIB
  571. select ARCH_USES_GETTIMEOFFSET
  572. select NEED_MACH_MEMORY_H
  573. help
  574. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  575. System-on-Chip devices.
  576. config ARCH_W90X900
  577. bool "Nuvoton W90X900 CPU"
  578. select CPU_ARM926T
  579. select ARCH_REQUIRE_GPIOLIB
  580. select CLKDEV_LOOKUP
  581. select CLKSRC_MMIO
  582. select GENERIC_CLOCKEVENTS
  583. help
  584. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  585. At present, the w90x900 has been renamed nuc900, regarding
  586. the ARM series product line, you can login the following
  587. link address to know more.
  588. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  589. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  590. config ARCH_TEGRA
  591. bool "NVIDIA Tegra"
  592. select CLKDEV_LOOKUP
  593. select CLKSRC_MMIO
  594. select GENERIC_CLOCKEVENTS
  595. select GENERIC_GPIO
  596. select HAVE_CLK
  597. select HAVE_SMP
  598. select MIGHT_HAVE_CACHE_L2X0
  599. select NEED_MACH_IO_H if PCI
  600. select ARCH_HAS_CPUFREQ
  601. select USE_OF
  602. help
  603. This enables support for NVIDIA Tegra based systems (Tegra APX,
  604. Tegra 6xx and Tegra 2 series).
  605. config ARCH_PICOXCELL
  606. bool "Picochip picoXcell"
  607. select ARCH_REQUIRE_GPIOLIB
  608. select ARM_PATCH_PHYS_VIRT
  609. select ARM_VIC
  610. select CPU_V6K
  611. select DW_APB_TIMER
  612. select DW_APB_TIMER_OF
  613. select GENERIC_CLOCKEVENTS
  614. select GENERIC_GPIO
  615. select HAVE_TCM
  616. select NO_IOPORT
  617. select SPARSE_IRQ
  618. select USE_OF
  619. help
  620. This enables support for systems based on the Picochip picoXcell
  621. family of Femtocell devices. The picoxcell support requires device tree
  622. for all boards.
  623. config ARCH_PNX4008
  624. bool "Philips Nexperia PNX4008 Mobile"
  625. select CPU_ARM926T
  626. select CLKDEV_LOOKUP
  627. select ARCH_USES_GETTIMEOFFSET
  628. help
  629. This enables support for Philips PNX4008 mobile platform.
  630. config ARCH_PXA
  631. bool "PXA2xx/PXA3xx-based"
  632. depends on MMU
  633. select ARCH_MTD_XIP
  634. select ARCH_HAS_CPUFREQ
  635. select CLKDEV_LOOKUP
  636. select CLKSRC_MMIO
  637. select ARCH_REQUIRE_GPIOLIB
  638. select GENERIC_CLOCKEVENTS
  639. select GPIO_PXA
  640. select PLAT_PXA
  641. select SPARSE_IRQ
  642. select AUTO_ZRELADDR
  643. select MULTI_IRQ_HANDLER
  644. select ARM_CPU_SUSPEND if PM
  645. select HAVE_IDE
  646. help
  647. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  648. config ARCH_MSM
  649. bool "Qualcomm MSM"
  650. select HAVE_CLK
  651. select GENERIC_CLOCKEVENTS
  652. select ARCH_REQUIRE_GPIOLIB
  653. select CLKDEV_LOOKUP
  654. help
  655. Support for Qualcomm MSM/QSD based systems. This runs on the
  656. apps processor of the MSM/QSD and depends on a shared memory
  657. interface to the modem processor which runs the baseband
  658. stack and controls some vital subsystems
  659. (clock and power control, etc).
  660. config ARCH_SHMOBILE
  661. bool "Renesas SH-Mobile / R-Mobile"
  662. select HAVE_CLK
  663. select CLKDEV_LOOKUP
  664. select HAVE_MACH_CLKDEV
  665. select HAVE_SMP
  666. select GENERIC_CLOCKEVENTS
  667. select MIGHT_HAVE_CACHE_L2X0
  668. select NO_IOPORT
  669. select SPARSE_IRQ
  670. select MULTI_IRQ_HANDLER
  671. select PM_GENERIC_DOMAINS if PM
  672. select NEED_MACH_MEMORY_H
  673. help
  674. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  675. config ARCH_RPC
  676. bool "RiscPC"
  677. select ARCH_ACORN
  678. select FIQ
  679. select ARCH_MAY_HAVE_PC_FDC
  680. select HAVE_PATA_PLATFORM
  681. select ISA_DMA_API
  682. select NO_IOPORT
  683. select ARCH_SPARSEMEM_ENABLE
  684. select ARCH_USES_GETTIMEOFFSET
  685. select HAVE_IDE
  686. select NEED_MACH_IO_H
  687. select NEED_MACH_MEMORY_H
  688. help
  689. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  690. CD-ROM interface, serial and parallel port, and the floppy drive.
  691. config ARCH_SA1100
  692. bool "SA1100-based"
  693. select CLKSRC_MMIO
  694. select CPU_SA1100
  695. select ISA
  696. select ARCH_SPARSEMEM_ENABLE
  697. select ARCH_MTD_XIP
  698. select ARCH_HAS_CPUFREQ
  699. select CPU_FREQ
  700. select GENERIC_CLOCKEVENTS
  701. select CLKDEV_LOOKUP
  702. select ARCH_REQUIRE_GPIOLIB
  703. select HAVE_IDE
  704. select NEED_MACH_MEMORY_H
  705. select SPARSE_IRQ
  706. help
  707. Support for StrongARM 11x0 based boards.
  708. config ARCH_S3C24XX
  709. bool "Samsung S3C24XX SoCs"
  710. select GENERIC_GPIO
  711. select ARCH_HAS_CPUFREQ
  712. select HAVE_CLK
  713. select CLKDEV_LOOKUP
  714. select ARCH_USES_GETTIMEOFFSET
  715. select HAVE_S3C2410_I2C if I2C
  716. select HAVE_S3C_RTC if RTC_CLASS
  717. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  718. select NEED_MACH_IO_H
  719. help
  720. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  721. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  722. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  723. Samsung SMDK2410 development board (and derivatives).
  724. config ARCH_S3C64XX
  725. bool "Samsung S3C64XX"
  726. select PLAT_SAMSUNG
  727. select CPU_V6
  728. select ARM_VIC
  729. select HAVE_CLK
  730. select HAVE_TCM
  731. select CLKDEV_LOOKUP
  732. select NO_IOPORT
  733. select ARCH_USES_GETTIMEOFFSET
  734. select ARCH_HAS_CPUFREQ
  735. select ARCH_REQUIRE_GPIOLIB
  736. select SAMSUNG_CLKSRC
  737. select SAMSUNG_IRQ_VIC_TIMER
  738. select S3C_GPIO_TRACK
  739. select S3C_DEV_NAND
  740. select USB_ARCH_HAS_OHCI
  741. select SAMSUNG_GPIOLIB_4BIT
  742. select HAVE_S3C2410_I2C if I2C
  743. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  744. help
  745. Samsung S3C64XX series based systems
  746. config ARCH_S5P64X0
  747. bool "Samsung S5P6440 S5P6450"
  748. select CPU_V6
  749. select GENERIC_GPIO
  750. select HAVE_CLK
  751. select CLKDEV_LOOKUP
  752. select CLKSRC_MMIO
  753. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  754. select GENERIC_CLOCKEVENTS
  755. select HAVE_S3C2410_I2C if I2C
  756. select HAVE_S3C_RTC if RTC_CLASS
  757. help
  758. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  759. SMDK6450.
  760. config ARCH_S5PC100
  761. bool "Samsung S5PC100"
  762. select GENERIC_GPIO
  763. select HAVE_CLK
  764. select CLKDEV_LOOKUP
  765. select CPU_V7
  766. select ARCH_USES_GETTIMEOFFSET
  767. select HAVE_S3C2410_I2C if I2C
  768. select HAVE_S3C_RTC if RTC_CLASS
  769. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  770. help
  771. Samsung S5PC100 series based systems
  772. config ARCH_S5PV210
  773. bool "Samsung S5PV210/S5PC110"
  774. select CPU_V7
  775. select ARCH_SPARSEMEM_ENABLE
  776. select ARCH_HAS_HOLES_MEMORYMODEL
  777. select GENERIC_GPIO
  778. select HAVE_CLK
  779. select CLKDEV_LOOKUP
  780. select CLKSRC_MMIO
  781. select ARCH_HAS_CPUFREQ
  782. select GENERIC_CLOCKEVENTS
  783. select HAVE_S3C2410_I2C if I2C
  784. select HAVE_S3C_RTC if RTC_CLASS
  785. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  786. select NEED_MACH_MEMORY_H
  787. help
  788. Samsung S5PV210/S5PC110 series based systems
  789. config ARCH_EXYNOS
  790. bool "SAMSUNG EXYNOS"
  791. select CPU_V7
  792. select ARCH_SPARSEMEM_ENABLE
  793. select ARCH_HAS_HOLES_MEMORYMODEL
  794. select GENERIC_GPIO
  795. select HAVE_CLK
  796. select CLKDEV_LOOKUP
  797. select ARCH_HAS_CPUFREQ
  798. select GENERIC_CLOCKEVENTS
  799. select HAVE_S3C_RTC if RTC_CLASS
  800. select HAVE_S3C2410_I2C if I2C
  801. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  802. select NEED_MACH_MEMORY_H
  803. help
  804. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  805. config ARCH_SHARK
  806. bool "Shark"
  807. select CPU_SA110
  808. select ISA
  809. select ISA_DMA
  810. select ZONE_DMA
  811. select PCI
  812. select ARCH_USES_GETTIMEOFFSET
  813. select NEED_MACH_MEMORY_H
  814. select NEED_MACH_IO_H
  815. help
  816. Support for the StrongARM based Digital DNARD machine, also known
  817. as "Shark" (<http://www.shark-linux.de/shark.html>).
  818. config ARCH_U300
  819. bool "ST-Ericsson U300 Series"
  820. depends on MMU
  821. select CLKSRC_MMIO
  822. select CPU_ARM926T
  823. select HAVE_TCM
  824. select ARM_AMBA
  825. select ARM_PATCH_PHYS_VIRT
  826. select ARM_VIC
  827. select GENERIC_CLOCKEVENTS
  828. select CLKDEV_LOOKUP
  829. select COMMON_CLK
  830. select GENERIC_GPIO
  831. select ARCH_REQUIRE_GPIOLIB
  832. help
  833. Support for ST-Ericsson U300 series mobile platforms.
  834. config ARCH_U8500
  835. bool "ST-Ericsson U8500 Series"
  836. depends on MMU
  837. select CPU_V7
  838. select ARM_AMBA
  839. select GENERIC_CLOCKEVENTS
  840. select CLKDEV_LOOKUP
  841. select ARCH_REQUIRE_GPIOLIB
  842. select ARCH_HAS_CPUFREQ
  843. select HAVE_SMP
  844. select MIGHT_HAVE_CACHE_L2X0
  845. help
  846. Support for ST-Ericsson's Ux500 architecture
  847. config ARCH_NOMADIK
  848. bool "STMicroelectronics Nomadik"
  849. select ARM_AMBA
  850. select ARM_VIC
  851. select CPU_ARM926T
  852. select COMMON_CLK
  853. select GENERIC_CLOCKEVENTS
  854. select PINCTRL
  855. select MIGHT_HAVE_CACHE_L2X0
  856. select ARCH_REQUIRE_GPIOLIB
  857. help
  858. Support for the Nomadik platform by ST-Ericsson
  859. config ARCH_DAVINCI
  860. bool "TI DaVinci"
  861. select GENERIC_CLOCKEVENTS
  862. select ARCH_REQUIRE_GPIOLIB
  863. select ZONE_DMA
  864. select HAVE_IDE
  865. select CLKDEV_LOOKUP
  866. select GENERIC_ALLOCATOR
  867. select GENERIC_IRQ_CHIP
  868. select ARCH_HAS_HOLES_MEMORYMODEL
  869. help
  870. Support for TI's DaVinci platform.
  871. config ARCH_OMAP
  872. bool "TI OMAP"
  873. depends on MMU
  874. select HAVE_CLK
  875. select ARCH_REQUIRE_GPIOLIB
  876. select ARCH_HAS_CPUFREQ
  877. select CLKSRC_MMIO
  878. select GENERIC_CLOCKEVENTS
  879. select ARCH_HAS_HOLES_MEMORYMODEL
  880. help
  881. Support for TI's OMAP platform (OMAP1/2/3/4).
  882. config PLAT_SPEAR
  883. bool "ST SPEAr"
  884. select ARM_AMBA
  885. select ARCH_REQUIRE_GPIOLIB
  886. select CLKDEV_LOOKUP
  887. select COMMON_CLK
  888. select CLKSRC_MMIO
  889. select GENERIC_CLOCKEVENTS
  890. select HAVE_CLK
  891. help
  892. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  893. config ARCH_VT8500
  894. bool "VIA/WonderMedia 85xx"
  895. select CPU_ARM926T
  896. select GENERIC_GPIO
  897. select ARCH_HAS_CPUFREQ
  898. select GENERIC_CLOCKEVENTS
  899. select ARCH_REQUIRE_GPIOLIB
  900. help
  901. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  902. config ARCH_ZYNQ
  903. bool "Xilinx Zynq ARM Cortex A9 Platform"
  904. select CPU_V7
  905. select GENERIC_CLOCKEVENTS
  906. select CLKDEV_LOOKUP
  907. select ARM_GIC
  908. select ARM_AMBA
  909. select ICST
  910. select MIGHT_HAVE_CACHE_L2X0
  911. select USE_OF
  912. help
  913. Support for Xilinx Zynq ARM Cortex A9 Platform
  914. endchoice
  915. #
  916. # This is sorted alphabetically by mach-* pathname. However, plat-*
  917. # Kconfigs may be included either alphabetically (according to the
  918. # plat- suffix) or along side the corresponding mach-* source.
  919. #
  920. source "arch/arm/mach-mvebu/Kconfig"
  921. source "arch/arm/mach-at91/Kconfig"
  922. source "arch/arm/mach-clps711x/Kconfig"
  923. source "arch/arm/mach-cns3xxx/Kconfig"
  924. source "arch/arm/mach-davinci/Kconfig"
  925. source "arch/arm/mach-dove/Kconfig"
  926. source "arch/arm/mach-ep93xx/Kconfig"
  927. source "arch/arm/mach-footbridge/Kconfig"
  928. source "arch/arm/mach-gemini/Kconfig"
  929. source "arch/arm/mach-h720x/Kconfig"
  930. source "arch/arm/mach-integrator/Kconfig"
  931. source "arch/arm/mach-iop32x/Kconfig"
  932. source "arch/arm/mach-iop33x/Kconfig"
  933. source "arch/arm/mach-iop13xx/Kconfig"
  934. source "arch/arm/mach-ixp4xx/Kconfig"
  935. source "arch/arm/mach-kirkwood/Kconfig"
  936. source "arch/arm/mach-ks8695/Kconfig"
  937. source "arch/arm/mach-msm/Kconfig"
  938. source "arch/arm/mach-mv78xx0/Kconfig"
  939. source "arch/arm/plat-mxc/Kconfig"
  940. source "arch/arm/mach-mxs/Kconfig"
  941. source "arch/arm/mach-netx/Kconfig"
  942. source "arch/arm/mach-nomadik/Kconfig"
  943. source "arch/arm/plat-nomadik/Kconfig"
  944. source "arch/arm/plat-omap/Kconfig"
  945. source "arch/arm/mach-omap1/Kconfig"
  946. source "arch/arm/mach-omap2/Kconfig"
  947. source "arch/arm/mach-orion5x/Kconfig"
  948. source "arch/arm/mach-pxa/Kconfig"
  949. source "arch/arm/plat-pxa/Kconfig"
  950. source "arch/arm/mach-mmp/Kconfig"
  951. source "arch/arm/mach-realview/Kconfig"
  952. source "arch/arm/mach-sa1100/Kconfig"
  953. source "arch/arm/plat-samsung/Kconfig"
  954. source "arch/arm/plat-s3c24xx/Kconfig"
  955. source "arch/arm/plat-spear/Kconfig"
  956. source "arch/arm/mach-s3c24xx/Kconfig"
  957. if ARCH_S3C24XX
  958. source "arch/arm/mach-s3c2412/Kconfig"
  959. source "arch/arm/mach-s3c2440/Kconfig"
  960. endif
  961. if ARCH_S3C64XX
  962. source "arch/arm/mach-s3c64xx/Kconfig"
  963. endif
  964. source "arch/arm/mach-s5p64x0/Kconfig"
  965. source "arch/arm/mach-s5pc100/Kconfig"
  966. source "arch/arm/mach-s5pv210/Kconfig"
  967. source "arch/arm/mach-exynos/Kconfig"
  968. source "arch/arm/mach-shmobile/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-vt8500/Kconfig"
  976. source "arch/arm/mach-w90x900/Kconfig"
  977. # Definitions to make life easier
  978. config ARCH_ACORN
  979. bool
  980. config PLAT_IOP
  981. bool
  982. select GENERIC_CLOCKEVENTS
  983. config PLAT_ORION
  984. bool
  985. select CLKSRC_MMIO
  986. select GENERIC_IRQ_CHIP
  987. select IRQ_DOMAIN
  988. select COMMON_CLK
  989. config PLAT_PXA
  990. bool
  991. config PLAT_VERSATILE
  992. bool
  993. config ARM_TIMER_SP804
  994. bool
  995. select CLKSRC_MMIO
  996. select HAVE_SCHED_CLOCK
  997. source arch/arm/mm/Kconfig
  998. config ARM_NR_BANKS
  999. int
  1000. default 16 if ARCH_EP93XX
  1001. default 8
  1002. config IWMMXT
  1003. bool "Enable iWMMXt support"
  1004. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1005. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1006. help
  1007. Enable support for iWMMXt context switching at run time if
  1008. running on a CPU that supports it.
  1009. config XSCALE_PMU
  1010. bool
  1011. depends on CPU_XSCALE
  1012. default y
  1013. config CPU_HAS_PMU
  1014. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  1015. (!ARCH_OMAP3 || OMAP3_EMU)
  1016. default y
  1017. bool
  1018. config MULTI_IRQ_HANDLER
  1019. bool
  1020. help
  1021. Allow each machine to specify it's own IRQ handler at run time.
  1022. if !MMU
  1023. source "arch/arm/Kconfig-nommu"
  1024. endif
  1025. config ARM_ERRATA_326103
  1026. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1027. depends on CPU_V6
  1028. help
  1029. Executing a SWP instruction to read-only memory does not set bit 11
  1030. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1031. treat the access as a read, preventing a COW from occurring and
  1032. causing the faulting task to livelock.
  1033. config ARM_ERRATA_411920
  1034. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1035. depends on CPU_V6 || CPU_V6K
  1036. help
  1037. Invalidation of the Instruction Cache operation can
  1038. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1039. It does not affect the MPCore. This option enables the ARM Ltd.
  1040. recommended workaround.
  1041. config ARM_ERRATA_430973
  1042. bool "ARM errata: Stale prediction on replaced interworking branch"
  1043. depends on CPU_V7
  1044. help
  1045. This option enables the workaround for the 430973 Cortex-A8
  1046. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1047. interworking branch is replaced with another code sequence at the
  1048. same virtual address, whether due to self-modifying code or virtual
  1049. to physical address re-mapping, Cortex-A8 does not recover from the
  1050. stale interworking branch prediction. This results in Cortex-A8
  1051. executing the new code sequence in the incorrect ARM or Thumb state.
  1052. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1053. and also flushes the branch target cache at every context switch.
  1054. Note that setting specific bits in the ACTLR register may not be
  1055. available in non-secure mode.
  1056. config ARM_ERRATA_458693
  1057. bool "ARM errata: Processor deadlock when a false hazard is created"
  1058. depends on CPU_V7
  1059. help
  1060. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1061. erratum. For very specific sequences of memory operations, it is
  1062. possible for a hazard condition intended for a cache line to instead
  1063. be incorrectly associated with a different cache line. This false
  1064. hazard might then cause a processor deadlock. The workaround enables
  1065. the L1 caching of the NEON accesses and disables the PLD instruction
  1066. in the ACTLR register. Note that setting specific bits in the ACTLR
  1067. register may not be available in non-secure mode.
  1068. config ARM_ERRATA_460075
  1069. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1070. depends on CPU_V7
  1071. help
  1072. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1073. erratum. Any asynchronous access to the L2 cache may encounter a
  1074. situation in which recent store transactions to the L2 cache are lost
  1075. and overwritten with stale memory contents from external memory. The
  1076. workaround disables the write-allocate mode for the L2 cache via the
  1077. ACTLR register. Note that setting specific bits in the ACTLR register
  1078. may not be available in non-secure mode.
  1079. config ARM_ERRATA_742230
  1080. bool "ARM errata: DMB operation may be faulty"
  1081. depends on CPU_V7 && SMP
  1082. help
  1083. This option enables the workaround for the 742230 Cortex-A9
  1084. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1085. between two write operations may not ensure the correct visibility
  1086. ordering of the two writes. This workaround sets a specific bit in
  1087. the diagnostic register of the Cortex-A9 which causes the DMB
  1088. instruction to behave as a DSB, ensuring the correct behaviour of
  1089. the two writes.
  1090. config ARM_ERRATA_742231
  1091. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1092. depends on CPU_V7 && SMP
  1093. help
  1094. This option enables the workaround for the 742231 Cortex-A9
  1095. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1096. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1097. accessing some data located in the same cache line, may get corrupted
  1098. data due to bad handling of the address hazard when the line gets
  1099. replaced from one of the CPUs at the same time as another CPU is
  1100. accessing it. This workaround sets specific bits in the diagnostic
  1101. register of the Cortex-A9 which reduces the linefill issuing
  1102. capabilities of the processor.
  1103. config PL310_ERRATA_588369
  1104. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1105. depends on CACHE_L2X0
  1106. help
  1107. The PL310 L2 cache controller implements three types of Clean &
  1108. Invalidate maintenance operations: by Physical Address
  1109. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1110. They are architecturally defined to behave as the execution of a
  1111. clean operation followed immediately by an invalidate operation,
  1112. both performing to the same memory location. This functionality
  1113. is not correctly implemented in PL310 as clean lines are not
  1114. invalidated as a result of these operations.
  1115. config ARM_ERRATA_720789
  1116. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1117. depends on CPU_V7
  1118. help
  1119. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1120. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1121. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1122. As a consequence of this erratum, some TLB entries which should be
  1123. invalidated are not, resulting in an incoherency in the system page
  1124. tables. The workaround changes the TLB flushing routines to invalidate
  1125. entries regardless of the ASID.
  1126. config PL310_ERRATA_727915
  1127. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1128. depends on CACHE_L2X0
  1129. help
  1130. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1131. operation (offset 0x7FC). This operation runs in background so that
  1132. PL310 can handle normal accesses while it is in progress. Under very
  1133. rare circumstances, due to this erratum, write data can be lost when
  1134. PL310 treats a cacheable write transaction during a Clean &
  1135. Invalidate by Way operation.
  1136. config ARM_ERRATA_743622
  1137. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1138. depends on CPU_V7
  1139. help
  1140. This option enables the workaround for the 743622 Cortex-A9
  1141. (r2p*) erratum. Under very rare conditions, a faulty
  1142. optimisation in the Cortex-A9 Store Buffer may lead to data
  1143. corruption. This workaround sets a specific bit in the diagnostic
  1144. register of the Cortex-A9 which disables the Store Buffer
  1145. optimisation, preventing the defect from occurring. This has no
  1146. visible impact on the overall performance or power consumption of the
  1147. processor.
  1148. config ARM_ERRATA_751472
  1149. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1150. depends on CPU_V7
  1151. help
  1152. This option enables the workaround for the 751472 Cortex-A9 (prior
  1153. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1154. completion of a following broadcasted operation if the second
  1155. operation is received by a CPU before the ICIALLUIS has completed,
  1156. potentially leading to corrupted entries in the cache or TLB.
  1157. config PL310_ERRATA_753970
  1158. bool "PL310 errata: cache sync operation may be faulty"
  1159. depends on CACHE_PL310
  1160. help
  1161. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1162. Under some condition the effect of cache sync operation on
  1163. the store buffer still remains when the operation completes.
  1164. This means that the store buffer is always asked to drain and
  1165. this prevents it from merging any further writes. The workaround
  1166. is to replace the normal offset of cache sync operation (0x730)
  1167. by another offset targeting an unmapped PL310 register 0x740.
  1168. This has the same effect as the cache sync operation: store buffer
  1169. drain and waiting for all buffers empty.
  1170. config ARM_ERRATA_754322
  1171. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1172. depends on CPU_V7
  1173. help
  1174. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1175. r3p*) erratum. A speculative memory access may cause a page table walk
  1176. which starts prior to an ASID switch but completes afterwards. This
  1177. can populate the micro-TLB with a stale entry which may be hit with
  1178. the new ASID. This workaround places two dsb instructions in the mm
  1179. switching code so that no page table walks can cross the ASID switch.
  1180. config ARM_ERRATA_754327
  1181. bool "ARM errata: no automatic Store Buffer drain"
  1182. depends on CPU_V7 && SMP
  1183. help
  1184. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1185. r2p0) erratum. The Store Buffer does not have any automatic draining
  1186. mechanism and therefore a livelock may occur if an external agent
  1187. continuously polls a memory location waiting to observe an update.
  1188. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1189. written polling loops from denying visibility of updates to memory.
  1190. config ARM_ERRATA_364296
  1191. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1192. depends on CPU_V6 && !SMP
  1193. help
  1194. This options enables the workaround for the 364296 ARM1136
  1195. r0p2 erratum (possible cache data corruption with
  1196. hit-under-miss enabled). It sets the undocumented bit 31 in
  1197. the auxiliary control register and the FI bit in the control
  1198. register, thus disabling hit-under-miss without putting the
  1199. processor into full low interrupt latency mode. ARM11MPCore
  1200. is not affected.
  1201. config ARM_ERRATA_764369
  1202. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1203. depends on CPU_V7 && SMP
  1204. help
  1205. This option enables the workaround for erratum 764369
  1206. affecting Cortex-A9 MPCore with two or more processors (all
  1207. current revisions). Under certain timing circumstances, a data
  1208. cache line maintenance operation by MVA targeting an Inner
  1209. Shareable memory region may fail to proceed up to either the
  1210. Point of Coherency or to the Point of Unification of the
  1211. system. This workaround adds a DSB instruction before the
  1212. relevant cache maintenance functions and sets a specific bit
  1213. in the diagnostic control register of the SCU.
  1214. config PL310_ERRATA_769419
  1215. bool "PL310 errata: no automatic Store Buffer drain"
  1216. depends on CACHE_L2X0
  1217. help
  1218. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1219. not automatically drain. This can cause normal, non-cacheable
  1220. writes to be retained when the memory system is idle, leading
  1221. to suboptimal I/O performance for drivers using coherent DMA.
  1222. This option adds a write barrier to the cpu_idle loop so that,
  1223. on systems with an outer cache, the store buffer is drained
  1224. explicitly.
  1225. endmenu
  1226. source "arch/arm/common/Kconfig"
  1227. menu "Bus support"
  1228. config ARM_AMBA
  1229. bool
  1230. config ISA
  1231. bool
  1232. help
  1233. Find out whether you have ISA slots on your motherboard. ISA is the
  1234. name of a bus system, i.e. the way the CPU talks to the other stuff
  1235. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1236. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1237. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1238. # Select ISA DMA controller support
  1239. config ISA_DMA
  1240. bool
  1241. select ISA_DMA_API
  1242. # Select ISA DMA interface
  1243. config ISA_DMA_API
  1244. bool
  1245. config PCI
  1246. bool "PCI support" if MIGHT_HAVE_PCI
  1247. help
  1248. Find out whether you have a PCI motherboard. PCI is the name of a
  1249. bus system, i.e. the way the CPU talks to the other stuff inside
  1250. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1251. VESA. If you have PCI, say Y, otherwise N.
  1252. config PCI_DOMAINS
  1253. bool
  1254. depends on PCI
  1255. config PCI_NANOENGINE
  1256. bool "BSE nanoEngine PCI support"
  1257. depends on SA1100_NANOENGINE
  1258. help
  1259. Enable PCI on the BSE nanoEngine board.
  1260. config PCI_SYSCALL
  1261. def_bool PCI
  1262. # Select the host bridge type
  1263. config PCI_HOST_VIA82C505
  1264. bool
  1265. depends on PCI && ARCH_SHARK
  1266. default y
  1267. config PCI_HOST_ITE8152
  1268. bool
  1269. depends on PCI && MACH_ARMCORE
  1270. default y
  1271. select DMABOUNCE
  1272. source "drivers/pci/Kconfig"
  1273. source "drivers/pcmcia/Kconfig"
  1274. endmenu
  1275. menu "Kernel Features"
  1276. config HAVE_SMP
  1277. bool
  1278. help
  1279. This option should be selected by machines which have an SMP-
  1280. capable CPU.
  1281. The only effect of this option is to make the SMP-related
  1282. options available to the user for configuration.
  1283. config SMP
  1284. bool "Symmetric Multi-Processing"
  1285. depends on CPU_V6K || CPU_V7
  1286. depends on GENERIC_CLOCKEVENTS
  1287. depends on HAVE_SMP
  1288. depends on MMU
  1289. select USE_GENERIC_SMP_HELPERS
  1290. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1291. help
  1292. This enables support for systems with more than one CPU. If you have
  1293. a system with only one CPU, like most personal computers, say N. If
  1294. you have a system with more than one CPU, say Y.
  1295. If you say N here, the kernel will run on single and multiprocessor
  1296. machines, but will use only one CPU of a multiprocessor machine. If
  1297. you say Y here, the kernel will run on many, but not all, single
  1298. processor machines. On a single processor machine, the kernel will
  1299. run faster if you say N here.
  1300. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1301. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1302. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1303. If you don't know what to do here, say N.
  1304. config SMP_ON_UP
  1305. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1306. depends on EXPERIMENTAL
  1307. depends on SMP && !XIP_KERNEL
  1308. default y
  1309. help
  1310. SMP kernels contain instructions which fail on non-SMP processors.
  1311. Enabling this option allows the kernel to modify itself to make
  1312. these instructions safe. Disabling it allows about 1K of space
  1313. savings.
  1314. If you don't know what to do here, say Y.
  1315. config ARM_CPU_TOPOLOGY
  1316. bool "Support cpu topology definition"
  1317. depends on SMP && CPU_V7
  1318. default y
  1319. help
  1320. Support ARM cpu topology definition. The MPIDR register defines
  1321. affinity between processors which is then used to describe the cpu
  1322. topology of an ARM System.
  1323. config SCHED_MC
  1324. bool "Multi-core scheduler support"
  1325. depends on ARM_CPU_TOPOLOGY
  1326. help
  1327. Multi-core scheduler support improves the CPU scheduler's decision
  1328. making when dealing with multi-core CPU chips at a cost of slightly
  1329. increased overhead in some places. If unsure say N here.
  1330. config SCHED_SMT
  1331. bool "SMT scheduler support"
  1332. depends on ARM_CPU_TOPOLOGY
  1333. help
  1334. Improves the CPU scheduler's decision making when dealing with
  1335. MultiThreading at a cost of slightly increased overhead in some
  1336. places. If unsure say N here.
  1337. config HAVE_ARM_SCU
  1338. bool
  1339. help
  1340. This option enables support for the ARM system coherency unit
  1341. config ARM_ARCH_TIMER
  1342. bool "Architected timer support"
  1343. depends on CPU_V7
  1344. help
  1345. This option enables support for the ARM architected timer
  1346. config HAVE_ARM_TWD
  1347. bool
  1348. depends on SMP
  1349. help
  1350. This options enables support for the ARM timer and watchdog unit
  1351. choice
  1352. prompt "Memory split"
  1353. default VMSPLIT_3G
  1354. help
  1355. Select the desired split between kernel and user memory.
  1356. If you are not absolutely sure what you are doing, leave this
  1357. option alone!
  1358. config VMSPLIT_3G
  1359. bool "3G/1G user/kernel split"
  1360. config VMSPLIT_2G
  1361. bool "2G/2G user/kernel split"
  1362. config VMSPLIT_1G
  1363. bool "1G/3G user/kernel split"
  1364. endchoice
  1365. config PAGE_OFFSET
  1366. hex
  1367. default 0x40000000 if VMSPLIT_1G
  1368. default 0x80000000 if VMSPLIT_2G
  1369. default 0xC0000000
  1370. config NR_CPUS
  1371. int "Maximum number of CPUs (2-32)"
  1372. range 2 32
  1373. depends on SMP
  1374. default "4"
  1375. config HOTPLUG_CPU
  1376. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1377. depends on SMP && HOTPLUG && EXPERIMENTAL
  1378. help
  1379. Say Y here to experiment with turning CPUs off and on. CPUs
  1380. can be controlled through /sys/devices/system/cpu.
  1381. config LOCAL_TIMERS
  1382. bool "Use local timer interrupts"
  1383. depends on SMP
  1384. default y
  1385. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1386. help
  1387. Enable support for local timers on SMP platforms, rather then the
  1388. legacy IPI broadcast method. Local timers allows the system
  1389. accounting to be spread across the timer interval, preventing a
  1390. "thundering herd" at every timer tick.
  1391. config ARCH_NR_GPIO
  1392. int
  1393. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1394. default 355 if ARCH_U8500
  1395. default 264 if MACH_H4700
  1396. default 512 if SOC_OMAP5
  1397. default 0
  1398. help
  1399. Maximum number of GPIOs in the system.
  1400. If unsure, leave the default value.
  1401. source kernel/Kconfig.preempt
  1402. config HZ
  1403. int
  1404. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1405. ARCH_S5PV210 || ARCH_EXYNOS4
  1406. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1407. default AT91_TIMER_HZ if ARCH_AT91
  1408. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1409. default 100
  1410. config THUMB2_KERNEL
  1411. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1412. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1413. select AEABI
  1414. select ARM_ASM_UNIFIED
  1415. select ARM_UNWIND
  1416. help
  1417. By enabling this option, the kernel will be compiled in
  1418. Thumb-2 mode. A compiler/assembler that understand the unified
  1419. ARM-Thumb syntax is needed.
  1420. If unsure, say N.
  1421. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1422. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1423. depends on THUMB2_KERNEL && MODULES
  1424. default y
  1425. help
  1426. Various binutils versions can resolve Thumb-2 branches to
  1427. locally-defined, preemptible global symbols as short-range "b.n"
  1428. branch instructions.
  1429. This is a problem, because there's no guarantee the final
  1430. destination of the symbol, or any candidate locations for a
  1431. trampoline, are within range of the branch. For this reason, the
  1432. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1433. relocation in modules at all, and it makes little sense to add
  1434. support.
  1435. The symptom is that the kernel fails with an "unsupported
  1436. relocation" error when loading some modules.
  1437. Until fixed tools are available, passing
  1438. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1439. code which hits this problem, at the cost of a bit of extra runtime
  1440. stack usage in some cases.
  1441. The problem is described in more detail at:
  1442. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1443. Only Thumb-2 kernels are affected.
  1444. Unless you are sure your tools don't have this problem, say Y.
  1445. config ARM_ASM_UNIFIED
  1446. bool
  1447. config AEABI
  1448. bool "Use the ARM EABI to compile the kernel"
  1449. help
  1450. This option allows for the kernel to be compiled using the latest
  1451. ARM ABI (aka EABI). This is only useful if you are using a user
  1452. space environment that is also compiled with EABI.
  1453. Since there are major incompatibilities between the legacy ABI and
  1454. EABI, especially with regard to structure member alignment, this
  1455. option also changes the kernel syscall calling convention to
  1456. disambiguate both ABIs and allow for backward compatibility support
  1457. (selected with CONFIG_OABI_COMPAT).
  1458. To use this you need GCC version 4.0.0 or later.
  1459. config OABI_COMPAT
  1460. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1461. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1462. default y
  1463. help
  1464. This option preserves the old syscall interface along with the
  1465. new (ARM EABI) one. It also provides a compatibility layer to
  1466. intercept syscalls that have structure arguments which layout
  1467. in memory differs between the legacy ABI and the new ARM EABI
  1468. (only for non "thumb" binaries). This option adds a tiny
  1469. overhead to all syscalls and produces a slightly larger kernel.
  1470. If you know you'll be using only pure EABI user space then you
  1471. can say N here. If this option is not selected and you attempt
  1472. to execute a legacy ABI binary then the result will be
  1473. UNPREDICTABLE (in fact it can be predicted that it won't work
  1474. at all). If in doubt say Y.
  1475. config ARCH_HAS_HOLES_MEMORYMODEL
  1476. bool
  1477. config ARCH_SPARSEMEM_ENABLE
  1478. bool
  1479. config ARCH_SPARSEMEM_DEFAULT
  1480. def_bool ARCH_SPARSEMEM_ENABLE
  1481. config ARCH_SELECT_MEMORY_MODEL
  1482. def_bool ARCH_SPARSEMEM_ENABLE
  1483. config HAVE_ARCH_PFN_VALID
  1484. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1485. config HIGHMEM
  1486. bool "High Memory Support"
  1487. depends on MMU
  1488. help
  1489. The address space of ARM processors is only 4 Gigabytes large
  1490. and it has to accommodate user address space, kernel address
  1491. space as well as some memory mapped IO. That means that, if you
  1492. have a large amount of physical memory and/or IO, not all of the
  1493. memory can be "permanently mapped" by the kernel. The physical
  1494. memory that is not permanently mapped is called "high memory".
  1495. Depending on the selected kernel/user memory split, minimum
  1496. vmalloc space and actual amount of RAM, you may not need this
  1497. option which should result in a slightly faster kernel.
  1498. If unsure, say n.
  1499. config HIGHPTE
  1500. bool "Allocate 2nd-level pagetables from highmem"
  1501. depends on HIGHMEM
  1502. config HW_PERF_EVENTS
  1503. bool "Enable hardware performance counter support for perf events"
  1504. depends on PERF_EVENTS && CPU_HAS_PMU
  1505. default y
  1506. help
  1507. Enable hardware performance counter support for perf events. If
  1508. disabled, perf events will use software events only.
  1509. source "mm/Kconfig"
  1510. config FORCE_MAX_ZONEORDER
  1511. int "Maximum zone order" if ARCH_SHMOBILE
  1512. range 11 64 if ARCH_SHMOBILE
  1513. default "9" if SA1111
  1514. default "11"
  1515. help
  1516. The kernel memory allocator divides physically contiguous memory
  1517. blocks into "zones", where each zone is a power of two number of
  1518. pages. This option selects the largest power of two that the kernel
  1519. keeps in the memory allocator. If you need to allocate very large
  1520. blocks of physically contiguous memory, then you may need to
  1521. increase this value.
  1522. This config option is actually maximum order plus one. For example,
  1523. a value of 11 means that the largest free memory block is 2^10 pages.
  1524. config LEDS
  1525. bool "Timer and CPU usage LEDs"
  1526. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1527. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1528. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1529. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1530. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1531. ARCH_AT91 || ARCH_DAVINCI || \
  1532. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1533. help
  1534. If you say Y here, the LEDs on your machine will be used
  1535. to provide useful information about your current system status.
  1536. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1537. be able to select which LEDs are active using the options below. If
  1538. you are compiling a kernel for the EBSA-110 or the LART however, the
  1539. red LED will simply flash regularly to indicate that the system is
  1540. still functional. It is safe to say Y here if you have a CATS
  1541. system, but the driver will do nothing.
  1542. config LEDS_TIMER
  1543. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1544. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1545. || MACH_OMAP_PERSEUS2
  1546. depends on LEDS
  1547. depends on !GENERIC_CLOCKEVENTS
  1548. default y if ARCH_EBSA110
  1549. help
  1550. If you say Y here, one of the system LEDs (the green one on the
  1551. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1552. will flash regularly to indicate that the system is still
  1553. operational. This is mainly useful to kernel hackers who are
  1554. debugging unstable kernels.
  1555. The LART uses the same LED for both Timer LED and CPU usage LED
  1556. functions. You may choose to use both, but the Timer LED function
  1557. will overrule the CPU usage LED.
  1558. config LEDS_CPU
  1559. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1560. !ARCH_OMAP) \
  1561. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1562. || MACH_OMAP_PERSEUS2
  1563. depends on LEDS
  1564. help
  1565. If you say Y here, the red LED will be used to give a good real
  1566. time indication of CPU usage, by lighting whenever the idle task
  1567. is not currently executing.
  1568. The LART uses the same LED for both Timer LED and CPU usage LED
  1569. functions. You may choose to use both, but the Timer LED function
  1570. will overrule the CPU usage LED.
  1571. config ALIGNMENT_TRAP
  1572. bool
  1573. depends on CPU_CP15_MMU
  1574. default y if !ARCH_EBSA110
  1575. select HAVE_PROC_CPU if PROC_FS
  1576. help
  1577. ARM processors cannot fetch/store information which is not
  1578. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1579. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1580. fetch/store instructions will be emulated in software if you say
  1581. here, which has a severe performance impact. This is necessary for
  1582. correct operation of some network protocols. With an IP-only
  1583. configuration it is safe to say N, otherwise say Y.
  1584. config UACCESS_WITH_MEMCPY
  1585. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1586. depends on MMU && EXPERIMENTAL
  1587. default y if CPU_FEROCEON
  1588. help
  1589. Implement faster copy_to_user and clear_user methods for CPU
  1590. cores where a 8-word STM instruction give significantly higher
  1591. memory write throughput than a sequence of individual 32bit stores.
  1592. A possible side effect is a slight increase in scheduling latency
  1593. between threads sharing the same address space if they invoke
  1594. such copy operations with large buffers.
  1595. However, if the CPU data cache is using a write-allocate mode,
  1596. this option is unlikely to provide any performance gain.
  1597. config SECCOMP
  1598. bool
  1599. prompt "Enable seccomp to safely compute untrusted bytecode"
  1600. ---help---
  1601. This kernel feature is useful for number crunching applications
  1602. that may need to compute untrusted bytecode during their
  1603. execution. By using pipes or other transports made available to
  1604. the process as file descriptors supporting the read/write
  1605. syscalls, it's possible to isolate those applications in
  1606. their own address space using seccomp. Once seccomp is
  1607. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1608. and the task is only allowed to execute a few safe syscalls
  1609. defined by each seccomp mode.
  1610. config CC_STACKPROTECTOR
  1611. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1612. depends on EXPERIMENTAL
  1613. help
  1614. This option turns on the -fstack-protector GCC feature. This
  1615. feature puts, at the beginning of functions, a canary value on
  1616. the stack just before the return address, and validates
  1617. the value just before actually returning. Stack based buffer
  1618. overflows (that need to overwrite this return address) now also
  1619. overwrite the canary, which gets detected and the attack is then
  1620. neutralized via a kernel panic.
  1621. This feature requires gcc version 4.2 or above.
  1622. config DEPRECATED_PARAM_STRUCT
  1623. bool "Provide old way to pass kernel parameters"
  1624. help
  1625. This was deprecated in 2001 and announced to live on for 5 years.
  1626. Some old boot loaders still use this way.
  1627. endmenu
  1628. menu "Boot options"
  1629. config USE_OF
  1630. bool "Flattened Device Tree support"
  1631. select OF
  1632. select OF_EARLY_FLATTREE
  1633. select IRQ_DOMAIN
  1634. help
  1635. Include support for flattened device tree machine descriptions.
  1636. # Compressed boot loader in ROM. Yes, we really want to ask about
  1637. # TEXT and BSS so we preserve their values in the config files.
  1638. config ZBOOT_ROM_TEXT
  1639. hex "Compressed ROM boot loader base address"
  1640. default "0"
  1641. help
  1642. The physical address at which the ROM-able zImage is to be
  1643. placed in the target. Platforms which normally make use of
  1644. ROM-able zImage formats normally set this to a suitable
  1645. value in their defconfig file.
  1646. If ZBOOT_ROM is not enabled, this has no effect.
  1647. config ZBOOT_ROM_BSS
  1648. hex "Compressed ROM boot loader BSS address"
  1649. default "0"
  1650. help
  1651. The base address of an area of read/write memory in the target
  1652. for the ROM-able zImage which must be available while the
  1653. decompressor is running. It must be large enough to hold the
  1654. entire decompressed kernel plus an additional 128 KiB.
  1655. Platforms which normally make use of ROM-able zImage formats
  1656. normally set this to a suitable value in their defconfig file.
  1657. If ZBOOT_ROM is not enabled, this has no effect.
  1658. config ZBOOT_ROM
  1659. bool "Compressed boot loader in ROM/flash"
  1660. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1661. help
  1662. Say Y here if you intend to execute your compressed kernel image
  1663. (zImage) directly from ROM or flash. If unsure, say N.
  1664. choice
  1665. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1666. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1667. default ZBOOT_ROM_NONE
  1668. help
  1669. Include experimental SD/MMC loading code in the ROM-able zImage.
  1670. With this enabled it is possible to write the ROM-able zImage
  1671. kernel image to an MMC or SD card and boot the kernel straight
  1672. from the reset vector. At reset the processor Mask ROM will load
  1673. the first part of the ROM-able zImage which in turn loads the
  1674. rest the kernel image to RAM.
  1675. config ZBOOT_ROM_NONE
  1676. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1677. help
  1678. Do not load image from SD or MMC
  1679. config ZBOOT_ROM_MMCIF
  1680. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1681. help
  1682. Load image from MMCIF hardware block.
  1683. config ZBOOT_ROM_SH_MOBILE_SDHI
  1684. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1685. help
  1686. Load image from SDHI hardware block
  1687. endchoice
  1688. config ARM_APPENDED_DTB
  1689. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1690. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1691. help
  1692. With this option, the boot code will look for a device tree binary
  1693. (DTB) appended to zImage
  1694. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1695. This is meant as a backward compatibility convenience for those
  1696. systems with a bootloader that can't be upgraded to accommodate
  1697. the documented boot protocol using a device tree.
  1698. Beware that there is very little in terms of protection against
  1699. this option being confused by leftover garbage in memory that might
  1700. look like a DTB header after a reboot if no actual DTB is appended
  1701. to zImage. Do not leave this option active in a production kernel
  1702. if you don't intend to always append a DTB. Proper passing of the
  1703. location into r2 of a bootloader provided DTB is always preferable
  1704. to this option.
  1705. config ARM_ATAG_DTB_COMPAT
  1706. bool "Supplement the appended DTB with traditional ATAG information"
  1707. depends on ARM_APPENDED_DTB
  1708. help
  1709. Some old bootloaders can't be updated to a DTB capable one, yet
  1710. they provide ATAGs with memory configuration, the ramdisk address,
  1711. the kernel cmdline string, etc. Such information is dynamically
  1712. provided by the bootloader and can't always be stored in a static
  1713. DTB. To allow a device tree enabled kernel to be used with such
  1714. bootloaders, this option allows zImage to extract the information
  1715. from the ATAG list and store it at run time into the appended DTB.
  1716. choice
  1717. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1718. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1719. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1720. bool "Use bootloader kernel arguments if available"
  1721. help
  1722. Uses the command-line options passed by the boot loader instead of
  1723. the device tree bootargs property. If the boot loader doesn't provide
  1724. any, the device tree bootargs property will be used.
  1725. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1726. bool "Extend with bootloader kernel arguments"
  1727. help
  1728. The command-line arguments provided by the boot loader will be
  1729. appended to the the device tree bootargs property.
  1730. endchoice
  1731. config CMDLINE
  1732. string "Default kernel command string"
  1733. default ""
  1734. help
  1735. On some architectures (EBSA110 and CATS), there is currently no way
  1736. for the boot loader to pass arguments to the kernel. For these
  1737. architectures, you should supply some command-line options at build
  1738. time by entering them here. As a minimum, you should specify the
  1739. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1740. choice
  1741. prompt "Kernel command line type" if CMDLINE != ""
  1742. default CMDLINE_FROM_BOOTLOADER
  1743. config CMDLINE_FROM_BOOTLOADER
  1744. bool "Use bootloader kernel arguments if available"
  1745. help
  1746. Uses the command-line options passed by the boot loader. If
  1747. the boot loader doesn't provide any, the default kernel command
  1748. string provided in CMDLINE will be used.
  1749. config CMDLINE_EXTEND
  1750. bool "Extend bootloader kernel arguments"
  1751. help
  1752. The command-line arguments provided by the boot loader will be
  1753. appended to the default kernel command string.
  1754. config CMDLINE_FORCE
  1755. bool "Always use the default kernel command string"
  1756. help
  1757. Always use the default kernel command string, even if the boot
  1758. loader passes other arguments to the kernel.
  1759. This is useful if you cannot or don't want to change the
  1760. command-line options your boot loader passes to the kernel.
  1761. endchoice
  1762. config XIP_KERNEL
  1763. bool "Kernel Execute-In-Place from ROM"
  1764. depends on !ZBOOT_ROM && !ARM_LPAE
  1765. help
  1766. Execute-In-Place allows the kernel to run from non-volatile storage
  1767. directly addressable by the CPU, such as NOR flash. This saves RAM
  1768. space since the text section of the kernel is not loaded from flash
  1769. to RAM. Read-write sections, such as the data section and stack,
  1770. are still copied to RAM. The XIP kernel is not compressed since
  1771. it has to run directly from flash, so it will take more space to
  1772. store it. The flash address used to link the kernel object files,
  1773. and for storing it, is configuration dependent. Therefore, if you
  1774. say Y here, you must know the proper physical address where to
  1775. store the kernel image depending on your own flash memory usage.
  1776. Also note that the make target becomes "make xipImage" rather than
  1777. "make zImage" or "make Image". The final kernel binary to put in
  1778. ROM memory will be arch/arm/boot/xipImage.
  1779. If unsure, say N.
  1780. config XIP_PHYS_ADDR
  1781. hex "XIP Kernel Physical Location"
  1782. depends on XIP_KERNEL
  1783. default "0x00080000"
  1784. help
  1785. This is the physical address in your flash memory the kernel will
  1786. be linked for and stored to. This address is dependent on your
  1787. own flash usage.
  1788. config KEXEC
  1789. bool "Kexec system call (EXPERIMENTAL)"
  1790. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1791. help
  1792. kexec is a system call that implements the ability to shutdown your
  1793. current kernel, and to start another kernel. It is like a reboot
  1794. but it is independent of the system firmware. And like a reboot
  1795. you can start any kernel with it, not just Linux.
  1796. It is an ongoing process to be certain the hardware in a machine
  1797. is properly shutdown, so do not be surprised if this code does not
  1798. initially work for you. It may help to enable device hotplugging
  1799. support.
  1800. config ATAGS_PROC
  1801. bool "Export atags in procfs"
  1802. depends on KEXEC
  1803. default y
  1804. help
  1805. Should the atags used to boot the kernel be exported in an "atags"
  1806. file in procfs. Useful with kexec.
  1807. config CRASH_DUMP
  1808. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1809. depends on EXPERIMENTAL
  1810. help
  1811. Generate crash dump after being started by kexec. This should
  1812. be normally only set in special crash dump kernels which are
  1813. loaded in the main kernel with kexec-tools into a specially
  1814. reserved region and then later executed after a crash by
  1815. kdump/kexec. The crash dump kernel must be compiled to a
  1816. memory address not used by the main kernel
  1817. For more details see Documentation/kdump/kdump.txt
  1818. config AUTO_ZRELADDR
  1819. bool "Auto calculation of the decompressed kernel image address"
  1820. depends on !ZBOOT_ROM && !ARCH_U300
  1821. help
  1822. ZRELADDR is the physical address where the decompressed kernel
  1823. image will be placed. If AUTO_ZRELADDR is selected, the address
  1824. will be determined at run-time by masking the current IP with
  1825. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1826. from start of memory.
  1827. endmenu
  1828. menu "CPU Power Management"
  1829. if ARCH_HAS_CPUFREQ
  1830. source "drivers/cpufreq/Kconfig"
  1831. config CPU_FREQ_IMX
  1832. tristate "CPUfreq driver for i.MX CPUs"
  1833. depends on ARCH_MXC && CPU_FREQ
  1834. help
  1835. This enables the CPUfreq driver for i.MX CPUs.
  1836. config CPU_FREQ_SA1100
  1837. bool
  1838. config CPU_FREQ_SA1110
  1839. bool
  1840. config CPU_FREQ_INTEGRATOR
  1841. tristate "CPUfreq driver for ARM Integrator CPUs"
  1842. depends on ARCH_INTEGRATOR && CPU_FREQ
  1843. default y
  1844. help
  1845. This enables the CPUfreq driver for ARM Integrator CPUs.
  1846. For details, take a look at <file:Documentation/cpu-freq>.
  1847. If in doubt, say Y.
  1848. config CPU_FREQ_PXA
  1849. bool
  1850. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1851. default y
  1852. select CPU_FREQ_TABLE
  1853. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1854. config CPU_FREQ_S3C
  1855. bool
  1856. help
  1857. Internal configuration node for common cpufreq on Samsung SoC
  1858. config CPU_FREQ_S3C24XX
  1859. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1860. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1861. select CPU_FREQ_S3C
  1862. help
  1863. This enables the CPUfreq driver for the Samsung S3C24XX family
  1864. of CPUs.
  1865. For details, take a look at <file:Documentation/cpu-freq>.
  1866. If in doubt, say N.
  1867. config CPU_FREQ_S3C24XX_PLL
  1868. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1869. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1870. help
  1871. Compile in support for changing the PLL frequency from the
  1872. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1873. after a frequency change, so by default it is not enabled.
  1874. This also means that the PLL tables for the selected CPU(s) will
  1875. be built which may increase the size of the kernel image.
  1876. config CPU_FREQ_S3C24XX_DEBUG
  1877. bool "Debug CPUfreq Samsung driver core"
  1878. depends on CPU_FREQ_S3C24XX
  1879. help
  1880. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1881. config CPU_FREQ_S3C24XX_IODEBUG
  1882. bool "Debug CPUfreq Samsung driver IO timing"
  1883. depends on CPU_FREQ_S3C24XX
  1884. help
  1885. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1886. config CPU_FREQ_S3C24XX_DEBUGFS
  1887. bool "Export debugfs for CPUFreq"
  1888. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1889. help
  1890. Export status information via debugfs.
  1891. endif
  1892. source "drivers/cpuidle/Kconfig"
  1893. endmenu
  1894. menu "Floating point emulation"
  1895. comment "At least one emulation must be selected"
  1896. config FPE_NWFPE
  1897. bool "NWFPE math emulation"
  1898. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1899. ---help---
  1900. Say Y to include the NWFPE floating point emulator in the kernel.
  1901. This is necessary to run most binaries. Linux does not currently
  1902. support floating point hardware so you need to say Y here even if
  1903. your machine has an FPA or floating point co-processor podule.
  1904. You may say N here if you are going to load the Acorn FPEmulator
  1905. early in the bootup.
  1906. config FPE_NWFPE_XP
  1907. bool "Support extended precision"
  1908. depends on FPE_NWFPE
  1909. help
  1910. Say Y to include 80-bit support in the kernel floating-point
  1911. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1912. Note that gcc does not generate 80-bit operations by default,
  1913. so in most cases this option only enlarges the size of the
  1914. floating point emulator without any good reason.
  1915. You almost surely want to say N here.
  1916. config FPE_FASTFPE
  1917. bool "FastFPE math emulation (EXPERIMENTAL)"
  1918. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1919. ---help---
  1920. Say Y here to include the FAST floating point emulator in the kernel.
  1921. This is an experimental much faster emulator which now also has full
  1922. precision for the mantissa. It does not support any exceptions.
  1923. It is very simple, and approximately 3-6 times faster than NWFPE.
  1924. It should be sufficient for most programs. It may be not suitable
  1925. for scientific calculations, but you have to check this for yourself.
  1926. If you do not feel you need a faster FP emulation you should better
  1927. choose NWFPE.
  1928. config VFP
  1929. bool "VFP-format floating point maths"
  1930. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1931. help
  1932. Say Y to include VFP support code in the kernel. This is needed
  1933. if your hardware includes a VFP unit.
  1934. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1935. release notes and additional status information.
  1936. Say N if your target does not have VFP hardware.
  1937. config VFPv3
  1938. bool
  1939. depends on VFP
  1940. default y if CPU_V7
  1941. config NEON
  1942. bool "Advanced SIMD (NEON) Extension support"
  1943. depends on VFPv3 && CPU_V7
  1944. help
  1945. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1946. Extension.
  1947. endmenu
  1948. menu "Userspace binary formats"
  1949. source "fs/Kconfig.binfmt"
  1950. config ARTHUR
  1951. tristate "RISC OS personality"
  1952. depends on !AEABI
  1953. help
  1954. Say Y here to include the kernel code necessary if you want to run
  1955. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1956. experimental; if this sounds frightening, say N and sleep in peace.
  1957. You can also say M here to compile this support as a module (which
  1958. will be called arthur).
  1959. endmenu
  1960. menu "Power management options"
  1961. source "kernel/power/Kconfig"
  1962. config ARCH_SUSPEND_POSSIBLE
  1963. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1964. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1965. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1966. def_bool y
  1967. config ARM_CPU_SUSPEND
  1968. def_bool PM_SLEEP
  1969. endmenu
  1970. source "net/Kconfig"
  1971. source "drivers/Kconfig"
  1972. source "fs/Kconfig"
  1973. source "arch/arm/Kconfig.debug"
  1974. source "security/Kconfig"
  1975. source "crypto/Kconfig"
  1976. source "lib/Kconfig"