Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_HAVE_CUSTOM_GPIO_H
  5. select HAVE_AOUT
  6. select HAVE_DMA_API_DEBUG
  7. select HAVE_IDE if PCI || ISA || PCMCIA
  8. select HAVE_DMA_ATTRS
  9. select HAVE_DMA_CONTIGUOUS if MMU
  10. select HAVE_MEMBLOCK
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  14. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  15. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  16. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  17. select HAVE_ARCH_KGDB
  18. select HAVE_ARCH_TRACEHOOK
  19. select HAVE_SYSCALL_TRACEPOINTS
  20. select HAVE_KPROBES if !XIP_KERNEL
  21. select HAVE_KRETPROBES if (HAVE_KPROBES)
  22. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  23. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  24. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  25. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  26. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  27. select HAVE_GENERIC_DMA_COHERENT
  28. select HAVE_KERNEL_GZIP
  29. select HAVE_KERNEL_LZO
  30. select HAVE_KERNEL_LZMA
  31. select HAVE_KERNEL_XZ
  32. select HAVE_IRQ_WORK
  33. select HAVE_PERF_EVENTS
  34. select PERF_USE_VMALLOC
  35. select HAVE_REGS_AND_STACK_ACCESS_API
  36. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  37. select HAVE_C_RECORDMCOUNT
  38. select HAVE_GENERIC_HARDIRQS
  39. select HARDIRQS_SW_RESEND
  40. select GENERIC_IRQ_PROBE
  41. select GENERIC_IRQ_SHOW
  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 RWSEM_GENERIC_SPINLOCK
  110. bool
  111. default y
  112. config RWSEM_XCHGADD_ALGORITHM
  113. bool
  114. config ARCH_HAS_ILOG2_U32
  115. bool
  116. config ARCH_HAS_ILOG2_U64
  117. bool
  118. config ARCH_HAS_CPUFREQ
  119. bool
  120. help
  121. Internal node to signify that the ARCH has CPUFREQ support
  122. and that the relevant menu configurations are displayed for
  123. it.
  124. config GENERIC_HWEIGHT
  125. bool
  126. default y
  127. config GENERIC_CALIBRATE_DELAY
  128. bool
  129. default y
  130. config ARCH_MAY_HAVE_PC_FDC
  131. bool
  132. config ZONE_DMA
  133. bool
  134. config NEED_DMA_MAP_STATE
  135. def_bool y
  136. config ARCH_HAS_DMA_SET_COHERENT_MASK
  137. bool
  138. config GENERIC_ISA_DMA
  139. bool
  140. config FIQ
  141. bool
  142. config NEED_RET_TO_USER
  143. bool
  144. config ARCH_MTD_XIP
  145. bool
  146. config VECTORS_BASE
  147. hex
  148. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  149. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  150. default 0x00000000
  151. help
  152. The base address of exception vectors.
  153. config ARM_PATCH_PHYS_VIRT
  154. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  155. default y
  156. depends on !XIP_KERNEL && MMU
  157. depends on !ARCH_REALVIEW || !SPARSEMEM
  158. help
  159. Patch phys-to-virt and virt-to-phys translation functions at
  160. boot and module load time according to the position of the
  161. kernel in system memory.
  162. This can only be used with non-XIP MMU kernels where the base
  163. of physical memory is at a 16MB boundary.
  164. Only disable this option if you know that you do not require
  165. this feature (eg, building a kernel for a single machine) and
  166. you need to shrink the kernel to the minimal size.
  167. config NEED_MACH_GPIO_H
  168. bool
  169. help
  170. Select this when mach/gpio.h is required to provide special
  171. definitions for this platform. The need for mach/gpio.h should
  172. be avoided when possible.
  173. config NEED_MACH_IO_H
  174. bool
  175. help
  176. Select this when mach/io.h is required to provide special
  177. definitions for this platform. The need for mach/io.h should
  178. be avoided when possible.
  179. config NEED_MACH_MEMORY_H
  180. bool
  181. help
  182. Select this when mach/memory.h is required to provide special
  183. definitions for this platform. The need for mach/memory.h should
  184. be avoided when possible.
  185. config PHYS_OFFSET
  186. hex "Physical address of main memory" if MMU
  187. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  188. default DRAM_BASE if !MMU
  189. help
  190. Please provide the physical address corresponding to the
  191. location of main memory in your system.
  192. config GENERIC_BUG
  193. def_bool y
  194. depends on BUG
  195. source "init/Kconfig"
  196. source "kernel/Kconfig.freezer"
  197. menu "System Type"
  198. config MMU
  199. bool "MMU-based Paged Memory Management Support"
  200. default y
  201. help
  202. Select if you want MMU-based virtualised addressing space
  203. support by paged memory management. If unsure, say 'Y'.
  204. #
  205. # The "ARM system type" choice list is ordered alphabetically by option
  206. # text. Please add new entries in the option alphabetic order.
  207. #
  208. choice
  209. prompt "ARM system type"
  210. default ARCH_MULTIPLATFORM
  211. config ARCH_MULTIPLATFORM
  212. bool "Allow multiple platforms to be selected"
  213. select ARM_PATCH_PHYS_VIRT
  214. select AUTO_ZRELADDR
  215. select COMMON_CLK
  216. select MULTI_IRQ_HANDLER
  217. select SPARSE_IRQ
  218. select USE_OF
  219. depends on MMU
  220. config ARCH_INTEGRATOR
  221. bool "ARM Ltd. Integrator family"
  222. select ARM_AMBA
  223. select ARCH_HAS_CPUFREQ
  224. select COMMON_CLK
  225. select COMMON_CLK_VERSATILE
  226. select HAVE_TCM
  227. select ICST
  228. select GENERIC_CLOCKEVENTS
  229. select PLAT_VERSATILE
  230. select PLAT_VERSATILE_FPGA_IRQ
  231. select NEED_MACH_MEMORY_H
  232. select SPARSE_IRQ
  233. select MULTI_IRQ_HANDLER
  234. help
  235. Support for ARM's Integrator platform.
  236. config ARCH_REALVIEW
  237. bool "ARM Ltd. RealView family"
  238. select ARM_AMBA
  239. select COMMON_CLK
  240. select COMMON_CLK_VERSATILE
  241. select ICST
  242. select GENERIC_CLOCKEVENTS
  243. select ARCH_WANT_OPTIONAL_GPIOLIB
  244. select PLAT_VERSATILE
  245. select PLAT_VERSATILE_CLCD
  246. select ARM_TIMER_SP804
  247. select GPIO_PL061 if GPIOLIB
  248. select NEED_MACH_MEMORY_H
  249. help
  250. This enables support for ARM Ltd RealView boards.
  251. config ARCH_VERSATILE
  252. bool "ARM Ltd. Versatile family"
  253. select ARM_AMBA
  254. select ARM_VIC
  255. select CLKDEV_LOOKUP
  256. select HAVE_MACH_CLKDEV
  257. select ICST
  258. select GENERIC_CLOCKEVENTS
  259. select ARCH_WANT_OPTIONAL_GPIOLIB
  260. select PLAT_VERSATILE
  261. select PLAT_VERSATILE_CLOCK
  262. select PLAT_VERSATILE_CLCD
  263. select PLAT_VERSATILE_FPGA_IRQ
  264. select ARM_TIMER_SP804
  265. help
  266. This enables support for ARM Ltd Versatile board.
  267. config ARCH_AT91
  268. bool "Atmel AT91"
  269. select ARCH_REQUIRE_GPIOLIB
  270. select HAVE_CLK
  271. select CLKDEV_LOOKUP
  272. select IRQ_DOMAIN
  273. select NEED_MACH_GPIO_H
  274. select NEED_MACH_IO_H if PCCARD
  275. help
  276. This enables support for systems based on Atmel
  277. AT91RM9200 and AT91SAM9* processors.
  278. config ARCH_BCM2835
  279. bool "Broadcom BCM2835 family"
  280. select ARCH_WANT_OPTIONAL_GPIOLIB
  281. select ARM_AMBA
  282. select ARM_ERRATA_411920
  283. select ARM_TIMER_SP804
  284. select CLKDEV_LOOKUP
  285. select COMMON_CLK
  286. select CPU_V6
  287. select GENERIC_CLOCKEVENTS
  288. select MULTI_IRQ_HANDLER
  289. select SPARSE_IRQ
  290. select USE_OF
  291. help
  292. This enables support for the Broadcom BCM2835 SoC. This SoC is
  293. use in the Raspberry Pi, and Roku 2 devices.
  294. config ARCH_CLPS711X
  295. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  296. select CPU_ARM720T
  297. select ARCH_USES_GETTIMEOFFSET
  298. select COMMON_CLK
  299. select CLKDEV_LOOKUP
  300. select NEED_MACH_MEMORY_H
  301. help
  302. Support for Cirrus Logic 711x/721x/731x based boards.
  303. config ARCH_CNS3XXX
  304. bool "Cavium Networks CNS3XXX family"
  305. select CPU_V6K
  306. select GENERIC_CLOCKEVENTS
  307. select ARM_GIC
  308. select MIGHT_HAVE_CACHE_L2X0
  309. select MIGHT_HAVE_PCI
  310. select PCI_DOMAINS if PCI
  311. help
  312. Support for Cavium Networks CNS3XXX platform.
  313. config ARCH_GEMINI
  314. bool "Cortina Systems Gemini"
  315. select CPU_FA526
  316. select ARCH_REQUIRE_GPIOLIB
  317. select ARCH_USES_GETTIMEOFFSET
  318. help
  319. Support for the Cortina Systems Gemini family SoCs
  320. config ARCH_SIRF
  321. bool "CSR SiRF"
  322. select NO_IOPORT
  323. select ARCH_REQUIRE_GPIOLIB
  324. select GENERIC_CLOCKEVENTS
  325. select COMMON_CLK
  326. select GENERIC_IRQ_CHIP
  327. select MIGHT_HAVE_CACHE_L2X0
  328. select PINCTRL
  329. select PINCTRL_SIRF
  330. select USE_OF
  331. help
  332. Support for CSR SiRFprimaII/Marco/Polo platforms
  333. config ARCH_EBSA110
  334. bool "EBSA-110"
  335. select CPU_SA110
  336. select ISA
  337. select NO_IOPORT
  338. select ARCH_USES_GETTIMEOFFSET
  339. select NEED_MACH_IO_H
  340. select NEED_MACH_MEMORY_H
  341. help
  342. This is an evaluation board for the StrongARM processor available
  343. from Digital. It has limited hardware on-board, including an
  344. Ethernet interface, two PCMCIA sockets, two serial ports and a
  345. parallel port.
  346. config ARCH_EP93XX
  347. bool "EP93xx-based"
  348. select CPU_ARM920T
  349. select ARM_AMBA
  350. select ARM_VIC
  351. select CLKDEV_LOOKUP
  352. select ARCH_REQUIRE_GPIOLIB
  353. select ARCH_HAS_HOLES_MEMORYMODEL
  354. select ARCH_USES_GETTIMEOFFSET
  355. select NEED_MACH_MEMORY_H
  356. help
  357. This enables support for the Cirrus EP93xx series of CPUs.
  358. config ARCH_FOOTBRIDGE
  359. bool "FootBridge"
  360. select CPU_SA110
  361. select FOOTBRIDGE
  362. select GENERIC_CLOCKEVENTS
  363. select HAVE_IDE
  364. select NEED_MACH_IO_H if !MMU
  365. select NEED_MACH_MEMORY_H
  366. help
  367. Support for systems based on the DC21285 companion chip
  368. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  369. config ARCH_MXC
  370. bool "Freescale MXC/iMX-based"
  371. select GENERIC_CLOCKEVENTS
  372. select ARCH_REQUIRE_GPIOLIB
  373. select CLKDEV_LOOKUP
  374. select CLKSRC_MMIO
  375. select GENERIC_IRQ_CHIP
  376. select MULTI_IRQ_HANDLER
  377. select SPARSE_IRQ
  378. select USE_OF
  379. help
  380. Support for Freescale MXC/iMX-based family of processors
  381. config ARCH_MXS
  382. bool "Freescale MXS-based"
  383. select GENERIC_CLOCKEVENTS
  384. select ARCH_REQUIRE_GPIOLIB
  385. select CLKDEV_LOOKUP
  386. select CLKSRC_MMIO
  387. select COMMON_CLK
  388. select HAVE_CLK_PREPARE
  389. select MULTI_IRQ_HANDLER
  390. select PINCTRL
  391. select SPARSE_IRQ
  392. select USE_OF
  393. help
  394. Support for Freescale MXS-based family of processors
  395. config ARCH_NETX
  396. bool "Hilscher NetX based"
  397. select CLKSRC_MMIO
  398. select CPU_ARM926T
  399. select ARM_VIC
  400. select GENERIC_CLOCKEVENTS
  401. help
  402. This enables support for systems based on the Hilscher NetX Soc
  403. config ARCH_H720X
  404. bool "Hynix HMS720x-based"
  405. select CPU_ARM720T
  406. select ISA_DMA_API
  407. select ARCH_USES_GETTIMEOFFSET
  408. help
  409. This enables support for systems based on the Hynix HMS720x
  410. config ARCH_IOP13XX
  411. bool "IOP13xx-based"
  412. depends on MMU
  413. select CPU_XSC3
  414. select PLAT_IOP
  415. select PCI
  416. select ARCH_SUPPORTS_MSI
  417. select VMSPLIT_1G
  418. select NEED_MACH_MEMORY_H
  419. select NEED_RET_TO_USER
  420. help
  421. Support for Intel's IOP13XX (XScale) family of processors.
  422. config ARCH_IOP32X
  423. bool "IOP32x-based"
  424. depends on MMU
  425. select CPU_XSCALE
  426. select NEED_MACH_GPIO_H
  427. select NEED_MACH_IO_H
  428. select NEED_RET_TO_USER
  429. select PLAT_IOP
  430. select PCI
  431. select ARCH_REQUIRE_GPIOLIB
  432. help
  433. Support for Intel's 80219 and IOP32X (XScale) family of
  434. processors.
  435. config ARCH_IOP33X
  436. bool "IOP33x-based"
  437. depends on MMU
  438. select CPU_XSCALE
  439. select NEED_MACH_GPIO_H
  440. select NEED_MACH_IO_H
  441. select NEED_RET_TO_USER
  442. select PLAT_IOP
  443. select PCI
  444. select ARCH_REQUIRE_GPIOLIB
  445. help
  446. Support for Intel's IOP33X (XScale) family of processors.
  447. config ARCH_IXP4XX
  448. bool "IXP4xx-based"
  449. depends on MMU
  450. select ARCH_HAS_DMA_SET_COHERENT_MASK
  451. select CLKSRC_MMIO
  452. select CPU_XSCALE
  453. select ARCH_REQUIRE_GPIOLIB
  454. select GENERIC_CLOCKEVENTS
  455. select MIGHT_HAVE_PCI
  456. select NEED_MACH_IO_H
  457. select DMABOUNCE if PCI
  458. help
  459. Support for Intel's IXP4XX (XScale) family of processors.
  460. config ARCH_DOVE
  461. bool "Marvell Dove"
  462. select CPU_V7
  463. select ARCH_REQUIRE_GPIOLIB
  464. select GENERIC_CLOCKEVENTS
  465. select MIGHT_HAVE_PCI
  466. select PLAT_ORION_LEGACY
  467. select USB_ARCH_HAS_EHCI
  468. help
  469. Support for the Marvell Dove SoC 88AP510
  470. config ARCH_KIRKWOOD
  471. bool "Marvell Kirkwood"
  472. select CPU_FEROCEON
  473. select PCI
  474. select ARCH_REQUIRE_GPIOLIB
  475. select GENERIC_CLOCKEVENTS
  476. select PLAT_ORION_LEGACY
  477. help
  478. Support for the following Marvell Kirkwood series SoCs:
  479. 88F6180, 88F6192 and 88F6281.
  480. config ARCH_LPC32XX
  481. bool "NXP LPC32XX"
  482. select CLKSRC_MMIO
  483. select CPU_ARM926T
  484. select ARCH_REQUIRE_GPIOLIB
  485. select HAVE_IDE
  486. select ARM_AMBA
  487. select USB_ARCH_HAS_OHCI
  488. select CLKDEV_LOOKUP
  489. select GENERIC_CLOCKEVENTS
  490. select USE_OF
  491. select HAVE_PWM
  492. help
  493. Support for the NXP LPC32XX family of processors
  494. config ARCH_MV78XX0
  495. bool "Marvell MV78xx0"
  496. select CPU_FEROCEON
  497. select PCI
  498. select ARCH_REQUIRE_GPIOLIB
  499. select GENERIC_CLOCKEVENTS
  500. select PLAT_ORION_LEGACY
  501. help
  502. Support for the following Marvell MV78xx0 series SoCs:
  503. MV781x0, MV782x0.
  504. config ARCH_ORION5X
  505. bool "Marvell Orion"
  506. depends on MMU
  507. select CPU_FEROCEON
  508. select PCI
  509. select ARCH_REQUIRE_GPIOLIB
  510. select GENERIC_CLOCKEVENTS
  511. select PLAT_ORION_LEGACY
  512. help
  513. Support for the following Marvell Orion 5x series SoCs:
  514. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  515. Orion-2 (5281), Orion-1-90 (6183).
  516. config ARCH_MMP
  517. bool "Marvell PXA168/910/MMP2"
  518. depends on MMU
  519. select ARCH_REQUIRE_GPIOLIB
  520. select CLKDEV_LOOKUP
  521. select GENERIC_CLOCKEVENTS
  522. select GPIO_PXA
  523. select IRQ_DOMAIN
  524. select PLAT_PXA
  525. select SPARSE_IRQ
  526. select GENERIC_ALLOCATOR
  527. select NEED_MACH_GPIO_H
  528. help
  529. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  530. config ARCH_KS8695
  531. bool "Micrel/Kendin KS8695"
  532. select CPU_ARM922T
  533. select ARCH_REQUIRE_GPIOLIB
  534. select NEED_MACH_MEMORY_H
  535. select CLKSRC_MMIO
  536. select GENERIC_CLOCKEVENTS
  537. help
  538. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  539. System-on-Chip devices.
  540. config ARCH_W90X900
  541. bool "Nuvoton W90X900 CPU"
  542. select CPU_ARM926T
  543. select ARCH_REQUIRE_GPIOLIB
  544. select CLKDEV_LOOKUP
  545. select CLKSRC_MMIO
  546. select GENERIC_CLOCKEVENTS
  547. help
  548. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  549. At present, the w90x900 has been renamed nuc900, regarding
  550. the ARM series product line, you can login the following
  551. link address to know more.
  552. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  553. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  554. config ARCH_TEGRA
  555. bool "NVIDIA Tegra"
  556. select CLKDEV_LOOKUP
  557. select CLKSRC_MMIO
  558. select GENERIC_CLOCKEVENTS
  559. select GENERIC_GPIO
  560. select HAVE_CLK
  561. select HAVE_SMP
  562. select MIGHT_HAVE_CACHE_L2X0
  563. select ARCH_HAS_CPUFREQ
  564. select USE_OF
  565. select COMMON_CLK
  566. help
  567. This enables support for NVIDIA Tegra based systems (Tegra APX,
  568. Tegra 6xx and Tegra 2 series).
  569. config ARCH_PXA
  570. bool "PXA2xx/PXA3xx-based"
  571. depends on MMU
  572. select ARCH_MTD_XIP
  573. select ARCH_HAS_CPUFREQ
  574. select CLKDEV_LOOKUP
  575. select CLKSRC_MMIO
  576. select ARCH_REQUIRE_GPIOLIB
  577. select GENERIC_CLOCKEVENTS
  578. select GPIO_PXA
  579. select PLAT_PXA
  580. select SPARSE_IRQ
  581. select AUTO_ZRELADDR
  582. select MULTI_IRQ_HANDLER
  583. select ARM_CPU_SUSPEND if PM
  584. select HAVE_IDE
  585. select NEED_MACH_GPIO_H
  586. help
  587. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  588. config ARCH_MSM
  589. bool "Qualcomm MSM"
  590. select HAVE_CLK
  591. select GENERIC_CLOCKEVENTS
  592. select ARCH_REQUIRE_GPIOLIB
  593. select CLKDEV_LOOKUP
  594. help
  595. Support for Qualcomm MSM/QSD based systems. This runs on the
  596. apps processor of the MSM/QSD and depends on a shared memory
  597. interface to the modem processor which runs the baseband
  598. stack and controls some vital subsystems
  599. (clock and power control, etc).
  600. config ARCH_SHMOBILE
  601. bool "Renesas SH-Mobile / R-Mobile"
  602. select HAVE_CLK
  603. select CLKDEV_LOOKUP
  604. select HAVE_MACH_CLKDEV
  605. select HAVE_SMP
  606. select GENERIC_CLOCKEVENTS
  607. select MIGHT_HAVE_CACHE_L2X0
  608. select NO_IOPORT
  609. select SPARSE_IRQ
  610. select MULTI_IRQ_HANDLER
  611. select PM_GENERIC_DOMAINS if PM
  612. select NEED_MACH_MEMORY_H
  613. help
  614. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  615. config ARCH_RPC
  616. bool "RiscPC"
  617. select ARCH_ACORN
  618. select FIQ
  619. select ARCH_MAY_HAVE_PC_FDC
  620. select HAVE_PATA_PLATFORM
  621. select ISA_DMA_API
  622. select NO_IOPORT
  623. select ARCH_SPARSEMEM_ENABLE
  624. select ARCH_USES_GETTIMEOFFSET
  625. select HAVE_IDE
  626. select NEED_MACH_IO_H
  627. select NEED_MACH_MEMORY_H
  628. help
  629. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  630. CD-ROM interface, serial and parallel port, and the floppy drive.
  631. config ARCH_SA1100
  632. bool "SA1100-based"
  633. select CLKSRC_MMIO
  634. select CPU_SA1100
  635. select ISA
  636. select ARCH_SPARSEMEM_ENABLE
  637. select ARCH_MTD_XIP
  638. select ARCH_HAS_CPUFREQ
  639. select CPU_FREQ
  640. select GENERIC_CLOCKEVENTS
  641. select CLKDEV_LOOKUP
  642. select ARCH_REQUIRE_GPIOLIB
  643. select HAVE_IDE
  644. select NEED_MACH_GPIO_H
  645. select NEED_MACH_MEMORY_H
  646. select SPARSE_IRQ
  647. help
  648. Support for StrongARM 11x0 based boards.
  649. config ARCH_S3C24XX
  650. bool "Samsung S3C24XX SoCs"
  651. select GENERIC_GPIO
  652. select ARCH_HAS_CPUFREQ
  653. select HAVE_CLK
  654. select CLKDEV_LOOKUP
  655. select ARCH_USES_GETTIMEOFFSET
  656. select HAVE_S3C2410_I2C if I2C
  657. select HAVE_S3C_RTC if RTC_CLASS
  658. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  659. select NEED_MACH_GPIO_H
  660. select NEED_MACH_IO_H
  661. help
  662. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  663. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  664. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  665. Samsung SMDK2410 development board (and derivatives).
  666. config ARCH_S3C64XX
  667. bool "Samsung S3C64XX"
  668. select PLAT_SAMSUNG
  669. select CPU_V6
  670. select ARM_VIC
  671. select HAVE_CLK
  672. select HAVE_TCM
  673. select CLKDEV_LOOKUP
  674. select NO_IOPORT
  675. select ARCH_USES_GETTIMEOFFSET
  676. select ARCH_HAS_CPUFREQ
  677. select ARCH_REQUIRE_GPIOLIB
  678. select SAMSUNG_CLKSRC
  679. select SAMSUNG_IRQ_VIC_TIMER
  680. select S3C_GPIO_TRACK
  681. select S3C_DEV_NAND
  682. select USB_ARCH_HAS_OHCI
  683. select SAMSUNG_GPIOLIB_4BIT
  684. select HAVE_S3C2410_I2C if I2C
  685. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  686. select NEED_MACH_GPIO_H
  687. help
  688. Samsung S3C64XX series based systems
  689. config ARCH_S5P64X0
  690. bool "Samsung S5P6440 S5P6450"
  691. select CPU_V6
  692. select GENERIC_GPIO
  693. select HAVE_CLK
  694. select CLKDEV_LOOKUP
  695. select CLKSRC_MMIO
  696. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  697. select GENERIC_CLOCKEVENTS
  698. select HAVE_S3C2410_I2C if I2C
  699. select HAVE_S3C_RTC if RTC_CLASS
  700. select NEED_MACH_GPIO_H
  701. help
  702. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  703. SMDK6450.
  704. config ARCH_S5PC100
  705. bool "Samsung S5PC100"
  706. select GENERIC_GPIO
  707. select HAVE_CLK
  708. select CLKDEV_LOOKUP
  709. select CPU_V7
  710. select ARCH_USES_GETTIMEOFFSET
  711. select HAVE_S3C2410_I2C if I2C
  712. select HAVE_S3C_RTC if RTC_CLASS
  713. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  714. select NEED_MACH_GPIO_H
  715. help
  716. Samsung S5PC100 series based systems
  717. config ARCH_S5PV210
  718. bool "Samsung S5PV210/S5PC110"
  719. select CPU_V7
  720. select ARCH_SPARSEMEM_ENABLE
  721. select ARCH_HAS_HOLES_MEMORYMODEL
  722. select GENERIC_GPIO
  723. select HAVE_CLK
  724. select CLKDEV_LOOKUP
  725. select CLKSRC_MMIO
  726. select ARCH_HAS_CPUFREQ
  727. select GENERIC_CLOCKEVENTS
  728. select HAVE_S3C2410_I2C if I2C
  729. select HAVE_S3C_RTC if RTC_CLASS
  730. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  731. select NEED_MACH_GPIO_H
  732. select NEED_MACH_MEMORY_H
  733. help
  734. Samsung S5PV210/S5PC110 series based systems
  735. config ARCH_EXYNOS
  736. bool "SAMSUNG EXYNOS"
  737. select CPU_V7
  738. select ARCH_SPARSEMEM_ENABLE
  739. select ARCH_HAS_HOLES_MEMORYMODEL
  740. select GENERIC_GPIO
  741. select HAVE_CLK
  742. select CLKDEV_LOOKUP
  743. select ARCH_HAS_CPUFREQ
  744. select GENERIC_CLOCKEVENTS
  745. select HAVE_S3C_RTC if RTC_CLASS
  746. select HAVE_S3C2410_I2C if I2C
  747. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  748. select NEED_MACH_GPIO_H
  749. select NEED_MACH_MEMORY_H
  750. help
  751. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  752. config ARCH_SHARK
  753. bool "Shark"
  754. select CPU_SA110
  755. select ISA
  756. select ISA_DMA
  757. select ZONE_DMA
  758. select PCI
  759. select ARCH_USES_GETTIMEOFFSET
  760. select NEED_MACH_MEMORY_H
  761. help
  762. Support for the StrongARM based Digital DNARD machine, also known
  763. as "Shark" (<http://www.shark-linux.de/shark.html>).
  764. config ARCH_U300
  765. bool "ST-Ericsson U300 Series"
  766. depends on MMU
  767. select CLKSRC_MMIO
  768. select CPU_ARM926T
  769. select HAVE_TCM
  770. select ARM_AMBA
  771. select ARM_PATCH_PHYS_VIRT
  772. select ARM_VIC
  773. select GENERIC_CLOCKEVENTS
  774. select CLKDEV_LOOKUP
  775. select COMMON_CLK
  776. select GENERIC_GPIO
  777. select ARCH_REQUIRE_GPIOLIB
  778. select SPARSE_IRQ
  779. help
  780. Support for ST-Ericsson U300 series mobile platforms.
  781. config ARCH_U8500
  782. bool "ST-Ericsson U8500 Series"
  783. depends on MMU
  784. select CPU_V7
  785. select ARM_AMBA
  786. select GENERIC_CLOCKEVENTS
  787. select CLKDEV_LOOKUP
  788. select ARCH_REQUIRE_GPIOLIB
  789. select ARCH_HAS_CPUFREQ
  790. select HAVE_SMP
  791. select MIGHT_HAVE_CACHE_L2X0
  792. help
  793. Support for ST-Ericsson's Ux500 architecture
  794. config ARCH_NOMADIK
  795. bool "STMicroelectronics Nomadik"
  796. select ARM_AMBA
  797. select ARM_VIC
  798. select CPU_ARM926T
  799. select COMMON_CLK
  800. select GENERIC_CLOCKEVENTS
  801. select PINCTRL
  802. select PINCTRL_STN8815
  803. select MIGHT_HAVE_CACHE_L2X0
  804. select ARCH_REQUIRE_GPIOLIB
  805. help
  806. Support for the Nomadik platform by ST-Ericsson
  807. config ARCH_DAVINCI
  808. bool "TI DaVinci"
  809. select GENERIC_CLOCKEVENTS
  810. select ARCH_REQUIRE_GPIOLIB
  811. select ZONE_DMA
  812. select HAVE_IDE
  813. select CLKDEV_LOOKUP
  814. select GENERIC_ALLOCATOR
  815. select GENERIC_IRQ_CHIP
  816. select ARCH_HAS_HOLES_MEMORYMODEL
  817. select NEED_MACH_GPIO_H
  818. help
  819. Support for TI's DaVinci platform.
  820. config ARCH_OMAP
  821. bool "TI OMAP"
  822. depends on MMU
  823. select HAVE_CLK
  824. select ARCH_REQUIRE_GPIOLIB
  825. select ARCH_HAS_CPUFREQ
  826. select CLKSRC_MMIO
  827. select GENERIC_CLOCKEVENTS
  828. select ARCH_HAS_HOLES_MEMORYMODEL
  829. select NEED_MACH_GPIO_H
  830. help
  831. Support for TI's OMAP platform (OMAP1/2/3/4).
  832. config PLAT_SPEAR
  833. bool "ST SPEAr"
  834. select ARM_AMBA
  835. select ARCH_REQUIRE_GPIOLIB
  836. select CLKDEV_LOOKUP
  837. select COMMON_CLK
  838. select CLKSRC_MMIO
  839. select GENERIC_CLOCKEVENTS
  840. select HAVE_CLK
  841. help
  842. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  843. config ARCH_VT8500
  844. bool "VIA/WonderMedia 85xx"
  845. select CPU_ARM926T
  846. select GENERIC_GPIO
  847. select ARCH_HAS_CPUFREQ
  848. select GENERIC_CLOCKEVENTS
  849. select ARCH_REQUIRE_GPIOLIB
  850. select USE_OF
  851. select COMMON_CLK
  852. select HAVE_CLK
  853. select CLKDEV_LOOKUP
  854. help
  855. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  856. config ARCH_ZYNQ
  857. bool "Xilinx Zynq ARM Cortex A9 Platform"
  858. select CPU_V7
  859. select GENERIC_CLOCKEVENTS
  860. select CLKDEV_LOOKUP
  861. select ARM_GIC
  862. select ARM_AMBA
  863. select ICST
  864. select MIGHT_HAVE_CACHE_L2X0
  865. select USE_OF
  866. help
  867. Support for Xilinx Zynq ARM Cortex A9 Platform
  868. endchoice
  869. menu "Multiple platform selection"
  870. depends on ARCH_MULTIPLATFORM
  871. comment "CPU Core family selection"
  872. config ARCH_MULTI_V4
  873. bool "ARMv4 based platforms (FA526, StrongARM)"
  874. select ARCH_MULTI_V4_V5
  875. depends on !ARCH_MULTI_V6_V7
  876. config ARCH_MULTI_V4T
  877. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  878. select ARCH_MULTI_V4_V5
  879. depends on !ARCH_MULTI_V6_V7
  880. config ARCH_MULTI_V5
  881. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  882. select ARCH_MULTI_V4_V5
  883. depends on !ARCH_MULTI_V6_V7
  884. config ARCH_MULTI_V4_V5
  885. bool
  886. config ARCH_MULTI_V6
  887. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  888. select CPU_V6
  889. select ARCH_MULTI_V6_V7
  890. config ARCH_MULTI_V7
  891. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  892. select CPU_V7
  893. select ARCH_VEXPRESS
  894. default y
  895. select ARCH_MULTI_V6_V7
  896. config ARCH_MULTI_V6_V7
  897. bool
  898. config ARCH_MULTI_CPU_AUTO
  899. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  900. select ARCH_MULTI_V5
  901. endmenu
  902. #
  903. # This is sorted alphabetically by mach-* pathname. However, plat-*
  904. # Kconfigs may be included either alphabetically (according to the
  905. # plat- suffix) or along side the corresponding mach-* source.
  906. #
  907. source "arch/arm/mach-mvebu/Kconfig"
  908. source "arch/arm/mach-at91/Kconfig"
  909. source "arch/arm/mach-clps711x/Kconfig"
  910. source "arch/arm/mach-cns3xxx/Kconfig"
  911. source "arch/arm/mach-davinci/Kconfig"
  912. source "arch/arm/mach-dove/Kconfig"
  913. source "arch/arm/mach-ep93xx/Kconfig"
  914. source "arch/arm/mach-footbridge/Kconfig"
  915. source "arch/arm/mach-gemini/Kconfig"
  916. source "arch/arm/mach-h720x/Kconfig"
  917. source "arch/arm/mach-highbank/Kconfig"
  918. source "arch/arm/mach-integrator/Kconfig"
  919. source "arch/arm/mach-iop32x/Kconfig"
  920. source "arch/arm/mach-iop33x/Kconfig"
  921. source "arch/arm/mach-iop13xx/Kconfig"
  922. source "arch/arm/mach-ixp4xx/Kconfig"
  923. source "arch/arm/mach-kirkwood/Kconfig"
  924. source "arch/arm/mach-ks8695/Kconfig"
  925. source "arch/arm/mach-msm/Kconfig"
  926. source "arch/arm/mach-mv78xx0/Kconfig"
  927. source "arch/arm/plat-mxc/Kconfig"
  928. source "arch/arm/mach-mxs/Kconfig"
  929. source "arch/arm/mach-netx/Kconfig"
  930. source "arch/arm/mach-nomadik/Kconfig"
  931. source "arch/arm/plat-nomadik/Kconfig"
  932. source "arch/arm/plat-omap/Kconfig"
  933. source "arch/arm/mach-omap1/Kconfig"
  934. source "arch/arm/mach-omap2/Kconfig"
  935. source "arch/arm/mach-orion5x/Kconfig"
  936. source "arch/arm/mach-picoxcell/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/mach-socfpga/Kconfig"
  945. source "arch/arm/plat-spear/Kconfig"
  946. source "arch/arm/mach-s3c24xx/Kconfig"
  947. if ARCH_S3C24XX
  948. source "arch/arm/mach-s3c2412/Kconfig"
  949. source "arch/arm/mach-s3c2440/Kconfig"
  950. endif
  951. if ARCH_S3C64XX
  952. source "arch/arm/mach-s3c64xx/Kconfig"
  953. endif
  954. source "arch/arm/mach-s5p64x0/Kconfig"
  955. source "arch/arm/mach-s5pc100/Kconfig"
  956. source "arch/arm/mach-s5pv210/Kconfig"
  957. source "arch/arm/mach-exynos/Kconfig"
  958. source "arch/arm/mach-shmobile/Kconfig"
  959. source "arch/arm/mach-prima2/Kconfig"
  960. source "arch/arm/mach-tegra/Kconfig"
  961. source "arch/arm/mach-u300/Kconfig"
  962. source "arch/arm/mach-ux500/Kconfig"
  963. source "arch/arm/mach-versatile/Kconfig"
  964. source "arch/arm/mach-vexpress/Kconfig"
  965. source "arch/arm/plat-versatile/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_ORION_LEGACY
  980. bool
  981. select PLAT_ORION
  982. config PLAT_PXA
  983. bool
  984. config PLAT_VERSATILE
  985. bool
  986. config ARM_TIMER_SP804
  987. bool
  988. select CLKSRC_MMIO
  989. select HAVE_SCHED_CLOCK
  990. source arch/arm/mm/Kconfig
  991. config ARM_NR_BANKS
  992. int
  993. default 16 if ARCH_EP93XX
  994. default 8
  995. config IWMMXT
  996. bool "Enable iWMMXt support"
  997. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  998. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  999. help
  1000. Enable support for iWMMXt context switching at run time if
  1001. running on a CPU that supports it.
  1002. config XSCALE_PMU
  1003. bool
  1004. depends on CPU_XSCALE
  1005. default y
  1006. config MULTI_IRQ_HANDLER
  1007. bool
  1008. help
  1009. Allow each machine to specify it's own IRQ handler at run time.
  1010. if !MMU
  1011. source "arch/arm/Kconfig-nommu"
  1012. endif
  1013. config ARM_ERRATA_326103
  1014. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1015. depends on CPU_V6
  1016. help
  1017. Executing a SWP instruction to read-only memory does not set bit 11
  1018. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1019. treat the access as a read, preventing a COW from occurring and
  1020. causing the faulting task to livelock.
  1021. config ARM_ERRATA_411920
  1022. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1023. depends on CPU_V6 || CPU_V6K
  1024. help
  1025. Invalidation of the Instruction Cache operation can
  1026. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1027. It does not affect the MPCore. This option enables the ARM Ltd.
  1028. recommended workaround.
  1029. config ARM_ERRATA_430973
  1030. bool "ARM errata: Stale prediction on replaced interworking branch"
  1031. depends on CPU_V7
  1032. help
  1033. This option enables the workaround for the 430973 Cortex-A8
  1034. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1035. interworking branch is replaced with another code sequence at the
  1036. same virtual address, whether due to self-modifying code or virtual
  1037. to physical address re-mapping, Cortex-A8 does not recover from the
  1038. stale interworking branch prediction. This results in Cortex-A8
  1039. executing the new code sequence in the incorrect ARM or Thumb state.
  1040. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1041. and also flushes the branch target cache at every context switch.
  1042. Note that setting specific bits in the ACTLR register may not be
  1043. available in non-secure mode.
  1044. config ARM_ERRATA_458693
  1045. bool "ARM errata: Processor deadlock when a false hazard is created"
  1046. depends on CPU_V7
  1047. help
  1048. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1049. erratum. For very specific sequences of memory operations, it is
  1050. possible for a hazard condition intended for a cache line to instead
  1051. be incorrectly associated with a different cache line. This false
  1052. hazard might then cause a processor deadlock. The workaround enables
  1053. the L1 caching of the NEON accesses and disables the PLD instruction
  1054. in the ACTLR register. Note that setting specific bits in the ACTLR
  1055. register may not be available in non-secure mode.
  1056. config ARM_ERRATA_460075
  1057. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1058. depends on CPU_V7
  1059. help
  1060. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1061. erratum. Any asynchronous access to the L2 cache may encounter a
  1062. situation in which recent store transactions to the L2 cache are lost
  1063. and overwritten with stale memory contents from external memory. The
  1064. workaround disables the write-allocate mode for the L2 cache via the
  1065. ACTLR register. Note that setting specific bits in the ACTLR register
  1066. may not be available in non-secure mode.
  1067. config ARM_ERRATA_742230
  1068. bool "ARM errata: DMB operation may be faulty"
  1069. depends on CPU_V7 && SMP
  1070. help
  1071. This option enables the workaround for the 742230 Cortex-A9
  1072. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1073. between two write operations may not ensure the correct visibility
  1074. ordering of the two writes. This workaround sets a specific bit in
  1075. the diagnostic register of the Cortex-A9 which causes the DMB
  1076. instruction to behave as a DSB, ensuring the correct behaviour of
  1077. the two writes.
  1078. config ARM_ERRATA_742231
  1079. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1080. depends on CPU_V7 && SMP
  1081. help
  1082. This option enables the workaround for the 742231 Cortex-A9
  1083. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1084. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1085. accessing some data located in the same cache line, may get corrupted
  1086. data due to bad handling of the address hazard when the line gets
  1087. replaced from one of the CPUs at the same time as another CPU is
  1088. accessing it. This workaround sets specific bits in the diagnostic
  1089. register of the Cortex-A9 which reduces the linefill issuing
  1090. capabilities of the processor.
  1091. config PL310_ERRATA_588369
  1092. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1093. depends on CACHE_L2X0
  1094. help
  1095. The PL310 L2 cache controller implements three types of Clean &
  1096. Invalidate maintenance operations: by Physical Address
  1097. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1098. They are architecturally defined to behave as the execution of a
  1099. clean operation followed immediately by an invalidate operation,
  1100. both performing to the same memory location. This functionality
  1101. is not correctly implemented in PL310 as clean lines are not
  1102. invalidated as a result of these operations.
  1103. config ARM_ERRATA_720789
  1104. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1105. depends on CPU_V7
  1106. help
  1107. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1108. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1109. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1110. As a consequence of this erratum, some TLB entries which should be
  1111. invalidated are not, resulting in an incoherency in the system page
  1112. tables. The workaround changes the TLB flushing routines to invalidate
  1113. entries regardless of the ASID.
  1114. config PL310_ERRATA_727915
  1115. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1116. depends on CACHE_L2X0
  1117. help
  1118. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1119. operation (offset 0x7FC). This operation runs in background so that
  1120. PL310 can handle normal accesses while it is in progress. Under very
  1121. rare circumstances, due to this erratum, write data can be lost when
  1122. PL310 treats a cacheable write transaction during a Clean &
  1123. Invalidate by Way operation.
  1124. config ARM_ERRATA_743622
  1125. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1126. depends on CPU_V7
  1127. help
  1128. This option enables the workaround for the 743622 Cortex-A9
  1129. (r2p*) erratum. Under very rare conditions, a faulty
  1130. optimisation in the Cortex-A9 Store Buffer may lead to data
  1131. corruption. This workaround sets a specific bit in the diagnostic
  1132. register of the Cortex-A9 which disables the Store Buffer
  1133. optimisation, preventing the defect from occurring. This has no
  1134. visible impact on the overall performance or power consumption of the
  1135. processor.
  1136. config ARM_ERRATA_751472
  1137. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1138. depends on CPU_V7
  1139. help
  1140. This option enables the workaround for the 751472 Cortex-A9 (prior
  1141. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1142. completion of a following broadcasted operation if the second
  1143. operation is received by a CPU before the ICIALLUIS has completed,
  1144. potentially leading to corrupted entries in the cache or TLB.
  1145. config PL310_ERRATA_753970
  1146. bool "PL310 errata: cache sync operation may be faulty"
  1147. depends on CACHE_PL310
  1148. help
  1149. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1150. Under some condition the effect of cache sync operation on
  1151. the store buffer still remains when the operation completes.
  1152. This means that the store buffer is always asked to drain and
  1153. this prevents it from merging any further writes. The workaround
  1154. is to replace the normal offset of cache sync operation (0x730)
  1155. by another offset targeting an unmapped PL310 register 0x740.
  1156. This has the same effect as the cache sync operation: store buffer
  1157. drain and waiting for all buffers empty.
  1158. config ARM_ERRATA_754322
  1159. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1160. depends on CPU_V7
  1161. help
  1162. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1163. r3p*) erratum. A speculative memory access may cause a page table walk
  1164. which starts prior to an ASID switch but completes afterwards. This
  1165. can populate the micro-TLB with a stale entry which may be hit with
  1166. the new ASID. This workaround places two dsb instructions in the mm
  1167. switching code so that no page table walks can cross the ASID switch.
  1168. config ARM_ERRATA_754327
  1169. bool "ARM errata: no automatic Store Buffer drain"
  1170. depends on CPU_V7 && SMP
  1171. help
  1172. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1173. r2p0) erratum. The Store Buffer does not have any automatic draining
  1174. mechanism and therefore a livelock may occur if an external agent
  1175. continuously polls a memory location waiting to observe an update.
  1176. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1177. written polling loops from denying visibility of updates to memory.
  1178. config ARM_ERRATA_364296
  1179. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1180. depends on CPU_V6 && !SMP
  1181. help
  1182. This options enables the workaround for the 364296 ARM1136
  1183. r0p2 erratum (possible cache data corruption with
  1184. hit-under-miss enabled). It sets the undocumented bit 31 in
  1185. the auxiliary control register and the FI bit in the control
  1186. register, thus disabling hit-under-miss without putting the
  1187. processor into full low interrupt latency mode. ARM11MPCore
  1188. is not affected.
  1189. config ARM_ERRATA_764369
  1190. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1191. depends on CPU_V7 && SMP
  1192. help
  1193. This option enables the workaround for erratum 764369
  1194. affecting Cortex-A9 MPCore with two or more processors (all
  1195. current revisions). Under certain timing circumstances, a data
  1196. cache line maintenance operation by MVA targeting an Inner
  1197. Shareable memory region may fail to proceed up to either the
  1198. Point of Coherency or to the Point of Unification of the
  1199. system. This workaround adds a DSB instruction before the
  1200. relevant cache maintenance functions and sets a specific bit
  1201. in the diagnostic control register of the SCU.
  1202. config PL310_ERRATA_769419
  1203. bool "PL310 errata: no automatic Store Buffer drain"
  1204. depends on CACHE_L2X0
  1205. help
  1206. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1207. not automatically drain. This can cause normal, non-cacheable
  1208. writes to be retained when the memory system is idle, leading
  1209. to suboptimal I/O performance for drivers using coherent DMA.
  1210. This option adds a write barrier to the cpu_idle loop so that,
  1211. on systems with an outer cache, the store buffer is drained
  1212. explicitly.
  1213. config ARM_ERRATA_775420
  1214. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1215. depends on CPU_V7
  1216. help
  1217. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1218. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1219. operation aborts with MMU exception, it might cause the processor
  1220. to deadlock. This workaround puts DSB before executing ISB if
  1221. an abort may occur on cache maintenance.
  1222. endmenu
  1223. source "arch/arm/common/Kconfig"
  1224. menu "Bus support"
  1225. config ARM_AMBA
  1226. bool
  1227. config ISA
  1228. bool
  1229. help
  1230. Find out whether you have ISA slots on your motherboard. ISA is the
  1231. name of a bus system, i.e. the way the CPU talks to the other stuff
  1232. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1233. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1234. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1235. # Select ISA DMA controller support
  1236. config ISA_DMA
  1237. bool
  1238. select ISA_DMA_API
  1239. # Select ISA DMA interface
  1240. config ISA_DMA_API
  1241. bool
  1242. config PCI
  1243. bool "PCI support" if MIGHT_HAVE_PCI
  1244. help
  1245. Find out whether you have a PCI motherboard. PCI is the name of a
  1246. bus system, i.e. the way the CPU talks to the other stuff inside
  1247. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1248. VESA. If you have PCI, say Y, otherwise N.
  1249. config PCI_DOMAINS
  1250. bool
  1251. depends on PCI
  1252. config PCI_NANOENGINE
  1253. bool "BSE nanoEngine PCI support"
  1254. depends on SA1100_NANOENGINE
  1255. help
  1256. Enable PCI on the BSE nanoEngine board.
  1257. config PCI_SYSCALL
  1258. def_bool PCI
  1259. # Select the host bridge type
  1260. config PCI_HOST_VIA82C505
  1261. bool
  1262. depends on PCI && ARCH_SHARK
  1263. default y
  1264. config PCI_HOST_ITE8152
  1265. bool
  1266. depends on PCI && MACH_ARMCORE
  1267. default y
  1268. select DMABOUNCE
  1269. source "drivers/pci/Kconfig"
  1270. source "drivers/pcmcia/Kconfig"
  1271. endmenu
  1272. menu "Kernel Features"
  1273. config HAVE_SMP
  1274. bool
  1275. help
  1276. This option should be selected by machines which have an SMP-
  1277. capable CPU.
  1278. The only effect of this option is to make the SMP-related
  1279. options available to the user for configuration.
  1280. config SMP
  1281. bool "Symmetric Multi-Processing"
  1282. depends on CPU_V6K || CPU_V7
  1283. depends on GENERIC_CLOCKEVENTS
  1284. depends on HAVE_SMP
  1285. depends on MMU
  1286. select USE_GENERIC_SMP_HELPERS
  1287. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1288. help
  1289. This enables support for systems with more than one CPU. If you have
  1290. a system with only one CPU, like most personal computers, say N. If
  1291. you have a system with more than one CPU, say Y.
  1292. If you say N here, the kernel will run on single and multiprocessor
  1293. machines, but will use only one CPU of a multiprocessor machine. If
  1294. you say Y here, the kernel will run on many, but not all, single
  1295. processor machines. On a single processor machine, the kernel will
  1296. run faster if you say N here.
  1297. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1298. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1299. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1300. If you don't know what to do here, say N.
  1301. config SMP_ON_UP
  1302. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1303. depends on EXPERIMENTAL
  1304. depends on SMP && !XIP_KERNEL
  1305. default y
  1306. help
  1307. SMP kernels contain instructions which fail on non-SMP processors.
  1308. Enabling this option allows the kernel to modify itself to make
  1309. these instructions safe. Disabling it allows about 1K of space
  1310. savings.
  1311. If you don't know what to do here, say Y.
  1312. config ARM_CPU_TOPOLOGY
  1313. bool "Support cpu topology definition"
  1314. depends on SMP && CPU_V7
  1315. default y
  1316. help
  1317. Support ARM cpu topology definition. The MPIDR register defines
  1318. affinity between processors which is then used to describe the cpu
  1319. topology of an ARM System.
  1320. config SCHED_MC
  1321. bool "Multi-core scheduler support"
  1322. depends on ARM_CPU_TOPOLOGY
  1323. help
  1324. Multi-core scheduler support improves the CPU scheduler's decision
  1325. making when dealing with multi-core CPU chips at a cost of slightly
  1326. increased overhead in some places. If unsure say N here.
  1327. config SCHED_SMT
  1328. bool "SMT scheduler support"
  1329. depends on ARM_CPU_TOPOLOGY
  1330. help
  1331. Improves the CPU scheduler's decision making when dealing with
  1332. MultiThreading at a cost of slightly increased overhead in some
  1333. places. If unsure say N here.
  1334. config HAVE_ARM_SCU
  1335. bool
  1336. help
  1337. This option enables support for the ARM system coherency unit
  1338. config ARM_ARCH_TIMER
  1339. bool "Architected timer support"
  1340. depends on CPU_V7
  1341. help
  1342. This option enables support for the ARM architected timer
  1343. config HAVE_ARM_TWD
  1344. bool
  1345. depends on SMP
  1346. help
  1347. This options enables support for the ARM timer and watchdog unit
  1348. choice
  1349. prompt "Memory split"
  1350. default VMSPLIT_3G
  1351. help
  1352. Select the desired split between kernel and user memory.
  1353. If you are not absolutely sure what you are doing, leave this
  1354. option alone!
  1355. config VMSPLIT_3G
  1356. bool "3G/1G user/kernel split"
  1357. config VMSPLIT_2G
  1358. bool "2G/2G user/kernel split"
  1359. config VMSPLIT_1G
  1360. bool "1G/3G user/kernel split"
  1361. endchoice
  1362. config PAGE_OFFSET
  1363. hex
  1364. default 0x40000000 if VMSPLIT_1G
  1365. default 0x80000000 if VMSPLIT_2G
  1366. default 0xC0000000
  1367. config NR_CPUS
  1368. int "Maximum number of CPUs (2-32)"
  1369. range 2 32
  1370. depends on SMP
  1371. default "4"
  1372. config HOTPLUG_CPU
  1373. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1374. depends on SMP && HOTPLUG && EXPERIMENTAL
  1375. help
  1376. Say Y here to experiment with turning CPUs off and on. CPUs
  1377. can be controlled through /sys/devices/system/cpu.
  1378. config LOCAL_TIMERS
  1379. bool "Use local timer interrupts"
  1380. depends on SMP
  1381. default y
  1382. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1383. help
  1384. Enable support for local timers on SMP platforms, rather then the
  1385. legacy IPI broadcast method. Local timers allows the system
  1386. accounting to be spread across the timer interval, preventing a
  1387. "thundering herd" at every timer tick.
  1388. config ARCH_NR_GPIO
  1389. int
  1390. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1391. default 355 if ARCH_U8500
  1392. default 264 if MACH_H4700
  1393. default 512 if SOC_OMAP5
  1394. default 288 if ARCH_VT8500
  1395. default 0
  1396. help
  1397. Maximum number of GPIOs in the system.
  1398. If unsure, leave the default value.
  1399. source kernel/Kconfig.preempt
  1400. config HZ
  1401. int
  1402. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1403. ARCH_S5PV210 || ARCH_EXYNOS4
  1404. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1405. default AT91_TIMER_HZ if ARCH_AT91
  1406. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1407. default 100
  1408. config THUMB2_KERNEL
  1409. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1410. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1411. select AEABI
  1412. select ARM_ASM_UNIFIED
  1413. select ARM_UNWIND
  1414. help
  1415. By enabling this option, the kernel will be compiled in
  1416. Thumb-2 mode. A compiler/assembler that understand the unified
  1417. ARM-Thumb syntax is needed.
  1418. If unsure, say N.
  1419. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1420. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1421. depends on THUMB2_KERNEL && MODULES
  1422. default y
  1423. help
  1424. Various binutils versions can resolve Thumb-2 branches to
  1425. locally-defined, preemptible global symbols as short-range "b.n"
  1426. branch instructions.
  1427. This is a problem, because there's no guarantee the final
  1428. destination of the symbol, or any candidate locations for a
  1429. trampoline, are within range of the branch. For this reason, the
  1430. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1431. relocation in modules at all, and it makes little sense to add
  1432. support.
  1433. The symptom is that the kernel fails with an "unsupported
  1434. relocation" error when loading some modules.
  1435. Until fixed tools are available, passing
  1436. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1437. code which hits this problem, at the cost of a bit of extra runtime
  1438. stack usage in some cases.
  1439. The problem is described in more detail at:
  1440. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1441. Only Thumb-2 kernels are affected.
  1442. Unless you are sure your tools don't have this problem, say Y.
  1443. config ARM_ASM_UNIFIED
  1444. bool
  1445. config AEABI
  1446. bool "Use the ARM EABI to compile the kernel"
  1447. help
  1448. This option allows for the kernel to be compiled using the latest
  1449. ARM ABI (aka EABI). This is only useful if you are using a user
  1450. space environment that is also compiled with EABI.
  1451. Since there are major incompatibilities between the legacy ABI and
  1452. EABI, especially with regard to structure member alignment, this
  1453. option also changes the kernel syscall calling convention to
  1454. disambiguate both ABIs and allow for backward compatibility support
  1455. (selected with CONFIG_OABI_COMPAT).
  1456. To use this you need GCC version 4.0.0 or later.
  1457. config OABI_COMPAT
  1458. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1459. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1460. default y
  1461. help
  1462. This option preserves the old syscall interface along with the
  1463. new (ARM EABI) one. It also provides a compatibility layer to
  1464. intercept syscalls that have structure arguments which layout
  1465. in memory differs between the legacy ABI and the new ARM EABI
  1466. (only for non "thumb" binaries). This option adds a tiny
  1467. overhead to all syscalls and produces a slightly larger kernel.
  1468. If you know you'll be using only pure EABI user space then you
  1469. can say N here. If this option is not selected and you attempt
  1470. to execute a legacy ABI binary then the result will be
  1471. UNPREDICTABLE (in fact it can be predicted that it won't work
  1472. at all). If in doubt say Y.
  1473. config ARCH_HAS_HOLES_MEMORYMODEL
  1474. bool
  1475. config ARCH_SPARSEMEM_ENABLE
  1476. bool
  1477. config ARCH_SPARSEMEM_DEFAULT
  1478. def_bool ARCH_SPARSEMEM_ENABLE
  1479. config ARCH_SELECT_MEMORY_MODEL
  1480. def_bool ARCH_SPARSEMEM_ENABLE
  1481. config HAVE_ARCH_PFN_VALID
  1482. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1483. config HIGHMEM
  1484. bool "High Memory Support"
  1485. depends on MMU
  1486. help
  1487. The address space of ARM processors is only 4 Gigabytes large
  1488. and it has to accommodate user address space, kernel address
  1489. space as well as some memory mapped IO. That means that, if you
  1490. have a large amount of physical memory and/or IO, not all of the
  1491. memory can be "permanently mapped" by the kernel. The physical
  1492. memory that is not permanently mapped is called "high memory".
  1493. Depending on the selected kernel/user memory split, minimum
  1494. vmalloc space and actual amount of RAM, you may not need this
  1495. option which should result in a slightly faster kernel.
  1496. If unsure, say n.
  1497. config HIGHPTE
  1498. bool "Allocate 2nd-level pagetables from highmem"
  1499. depends on HIGHMEM
  1500. config HW_PERF_EVENTS
  1501. bool "Enable hardware performance counter support for perf events"
  1502. depends on PERF_EVENTS
  1503. default y
  1504. help
  1505. Enable hardware performance counter support for perf events. If
  1506. disabled, perf events will use software events only.
  1507. source "mm/Kconfig"
  1508. config FORCE_MAX_ZONEORDER
  1509. int "Maximum zone order" if ARCH_SHMOBILE
  1510. range 11 64 if ARCH_SHMOBILE
  1511. default "9" if SA1111
  1512. default "11"
  1513. help
  1514. The kernel memory allocator divides physically contiguous memory
  1515. blocks into "zones", where each zone is a power of two number of
  1516. pages. This option selects the largest power of two that the kernel
  1517. keeps in the memory allocator. If you need to allocate very large
  1518. blocks of physically contiguous memory, then you may need to
  1519. increase this value.
  1520. This config option is actually maximum order plus one. For example,
  1521. a value of 11 means that the largest free memory block is 2^10 pages.
  1522. config ALIGNMENT_TRAP
  1523. bool
  1524. depends on CPU_CP15_MMU
  1525. default y if !ARCH_EBSA110
  1526. select HAVE_PROC_CPU if PROC_FS
  1527. help
  1528. ARM processors cannot fetch/store information which is not
  1529. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1530. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1531. fetch/store instructions will be emulated in software if you say
  1532. here, which has a severe performance impact. This is necessary for
  1533. correct operation of some network protocols. With an IP-only
  1534. configuration it is safe to say N, otherwise say Y.
  1535. config UACCESS_WITH_MEMCPY
  1536. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1537. depends on MMU
  1538. default y if CPU_FEROCEON
  1539. help
  1540. Implement faster copy_to_user and clear_user methods for CPU
  1541. cores where a 8-word STM instruction give significantly higher
  1542. memory write throughput than a sequence of individual 32bit stores.
  1543. A possible side effect is a slight increase in scheduling latency
  1544. between threads sharing the same address space if they invoke
  1545. such copy operations with large buffers.
  1546. However, if the CPU data cache is using a write-allocate mode,
  1547. this option is unlikely to provide any performance gain.
  1548. config SECCOMP
  1549. bool
  1550. prompt "Enable seccomp to safely compute untrusted bytecode"
  1551. ---help---
  1552. This kernel feature is useful for number crunching applications
  1553. that may need to compute untrusted bytecode during their
  1554. execution. By using pipes or other transports made available to
  1555. the process as file descriptors supporting the read/write
  1556. syscalls, it's possible to isolate those applications in
  1557. their own address space using seccomp. Once seccomp is
  1558. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1559. and the task is only allowed to execute a few safe syscalls
  1560. defined by each seccomp mode.
  1561. config CC_STACKPROTECTOR
  1562. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1563. depends on EXPERIMENTAL
  1564. help
  1565. This option turns on the -fstack-protector GCC feature. This
  1566. feature puts, at the beginning of functions, a canary value on
  1567. the stack just before the return address, and validates
  1568. the value just before actually returning. Stack based buffer
  1569. overflows (that need to overwrite this return address) now also
  1570. overwrite the canary, which gets detected and the attack is then
  1571. neutralized via a kernel panic.
  1572. This feature requires gcc version 4.2 or above.
  1573. config XEN_DOM0
  1574. def_bool y
  1575. depends on XEN
  1576. config XEN
  1577. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1578. depends on EXPERIMENTAL && ARM && OF
  1579. depends on CPU_V7 && !CPU_V6
  1580. help
  1581. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1582. endmenu
  1583. menu "Boot options"
  1584. config USE_OF
  1585. bool "Flattened Device Tree support"
  1586. select OF
  1587. select OF_EARLY_FLATTREE
  1588. select IRQ_DOMAIN
  1589. help
  1590. Include support for flattened device tree machine descriptions.
  1591. config ATAGS
  1592. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1593. default y
  1594. help
  1595. This is the traditional way of passing data to the kernel at boot
  1596. time. If you are solely relying on the flattened device tree (or
  1597. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1598. to remove ATAGS support from your kernel binary. If unsure,
  1599. leave this to y.
  1600. config DEPRECATED_PARAM_STRUCT
  1601. bool "Provide old way to pass kernel parameters"
  1602. depends on ATAGS
  1603. help
  1604. This was deprecated in 2001 and announced to live on for 5 years.
  1605. Some old boot loaders still use this way.
  1606. # Compressed boot loader in ROM. Yes, we really want to ask about
  1607. # TEXT and BSS so we preserve their values in the config files.
  1608. config ZBOOT_ROM_TEXT
  1609. hex "Compressed ROM boot loader base address"
  1610. default "0"
  1611. help
  1612. The physical address at which the ROM-able zImage is to be
  1613. placed in the target. Platforms which normally make use of
  1614. ROM-able zImage formats normally set this to a suitable
  1615. value in their defconfig file.
  1616. If ZBOOT_ROM is not enabled, this has no effect.
  1617. config ZBOOT_ROM_BSS
  1618. hex "Compressed ROM boot loader BSS address"
  1619. default "0"
  1620. help
  1621. The base address of an area of read/write memory in the target
  1622. for the ROM-able zImage which must be available while the
  1623. decompressor is running. It must be large enough to hold the
  1624. entire decompressed kernel plus an additional 128 KiB.
  1625. Platforms which normally make use of ROM-able zImage formats
  1626. normally set this to a suitable value in their defconfig file.
  1627. If ZBOOT_ROM is not enabled, this has no effect.
  1628. config ZBOOT_ROM
  1629. bool "Compressed boot loader in ROM/flash"
  1630. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1631. help
  1632. Say Y here if you intend to execute your compressed kernel image
  1633. (zImage) directly from ROM or flash. If unsure, say N.
  1634. choice
  1635. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1636. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1637. default ZBOOT_ROM_NONE
  1638. help
  1639. Include experimental SD/MMC loading code in the ROM-able zImage.
  1640. With this enabled it is possible to write the ROM-able zImage
  1641. kernel image to an MMC or SD card and boot the kernel straight
  1642. from the reset vector. At reset the processor Mask ROM will load
  1643. the first part of the ROM-able zImage which in turn loads the
  1644. rest the kernel image to RAM.
  1645. config ZBOOT_ROM_NONE
  1646. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1647. help
  1648. Do not load image from SD or MMC
  1649. config ZBOOT_ROM_MMCIF
  1650. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1651. help
  1652. Load image from MMCIF hardware block.
  1653. config ZBOOT_ROM_SH_MOBILE_SDHI
  1654. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1655. help
  1656. Load image from SDHI hardware block
  1657. endchoice
  1658. config ARM_APPENDED_DTB
  1659. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1660. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1661. help
  1662. With this option, the boot code will look for a device tree binary
  1663. (DTB) appended to zImage
  1664. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1665. This is meant as a backward compatibility convenience for those
  1666. systems with a bootloader that can't be upgraded to accommodate
  1667. the documented boot protocol using a device tree.
  1668. Beware that there is very little in terms of protection against
  1669. this option being confused by leftover garbage in memory that might
  1670. look like a DTB header after a reboot if no actual DTB is appended
  1671. to zImage. Do not leave this option active in a production kernel
  1672. if you don't intend to always append a DTB. Proper passing of the
  1673. location into r2 of a bootloader provided DTB is always preferable
  1674. to this option.
  1675. config ARM_ATAG_DTB_COMPAT
  1676. bool "Supplement the appended DTB with traditional ATAG information"
  1677. depends on ARM_APPENDED_DTB
  1678. help
  1679. Some old bootloaders can't be updated to a DTB capable one, yet
  1680. they provide ATAGs with memory configuration, the ramdisk address,
  1681. the kernel cmdline string, etc. Such information is dynamically
  1682. provided by the bootloader and can't always be stored in a static
  1683. DTB. To allow a device tree enabled kernel to be used with such
  1684. bootloaders, this option allows zImage to extract the information
  1685. from the ATAG list and store it at run time into the appended DTB.
  1686. choice
  1687. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1688. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1689. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1690. bool "Use bootloader kernel arguments if available"
  1691. help
  1692. Uses the command-line options passed by the boot loader instead of
  1693. the device tree bootargs property. If the boot loader doesn't provide
  1694. any, the device tree bootargs property will be used.
  1695. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1696. bool "Extend with bootloader kernel arguments"
  1697. help
  1698. The command-line arguments provided by the boot loader will be
  1699. appended to the the device tree bootargs property.
  1700. endchoice
  1701. config CMDLINE
  1702. string "Default kernel command string"
  1703. default ""
  1704. help
  1705. On some architectures (EBSA110 and CATS), there is currently no way
  1706. for the boot loader to pass arguments to the kernel. For these
  1707. architectures, you should supply some command-line options at build
  1708. time by entering them here. As a minimum, you should specify the
  1709. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1710. choice
  1711. prompt "Kernel command line type" if CMDLINE != ""
  1712. default CMDLINE_FROM_BOOTLOADER
  1713. depends on ATAGS
  1714. config CMDLINE_FROM_BOOTLOADER
  1715. bool "Use bootloader kernel arguments if available"
  1716. help
  1717. Uses the command-line options passed by the boot loader. If
  1718. the boot loader doesn't provide any, the default kernel command
  1719. string provided in CMDLINE will be used.
  1720. config CMDLINE_EXTEND
  1721. bool "Extend bootloader kernel arguments"
  1722. help
  1723. The command-line arguments provided by the boot loader will be
  1724. appended to the default kernel command string.
  1725. config CMDLINE_FORCE
  1726. bool "Always use the default kernel command string"
  1727. help
  1728. Always use the default kernel command string, even if the boot
  1729. loader passes other arguments to the kernel.
  1730. This is useful if you cannot or don't want to change the
  1731. command-line options your boot loader passes to the kernel.
  1732. endchoice
  1733. config XIP_KERNEL
  1734. bool "Kernel Execute-In-Place from ROM"
  1735. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1736. help
  1737. Execute-In-Place allows the kernel to run from non-volatile storage
  1738. directly addressable by the CPU, such as NOR flash. This saves RAM
  1739. space since the text section of the kernel is not loaded from flash
  1740. to RAM. Read-write sections, such as the data section and stack,
  1741. are still copied to RAM. The XIP kernel is not compressed since
  1742. it has to run directly from flash, so it will take more space to
  1743. store it. The flash address used to link the kernel object files,
  1744. and for storing it, is configuration dependent. Therefore, if you
  1745. say Y here, you must know the proper physical address where to
  1746. store the kernel image depending on your own flash memory usage.
  1747. Also note that the make target becomes "make xipImage" rather than
  1748. "make zImage" or "make Image". The final kernel binary to put in
  1749. ROM memory will be arch/arm/boot/xipImage.
  1750. If unsure, say N.
  1751. config XIP_PHYS_ADDR
  1752. hex "XIP Kernel Physical Location"
  1753. depends on XIP_KERNEL
  1754. default "0x00080000"
  1755. help
  1756. This is the physical address in your flash memory the kernel will
  1757. be linked for and stored to. This address is dependent on your
  1758. own flash usage.
  1759. config KEXEC
  1760. bool "Kexec system call (EXPERIMENTAL)"
  1761. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1762. help
  1763. kexec is a system call that implements the ability to shutdown your
  1764. current kernel, and to start another kernel. It is like a reboot
  1765. but it is independent of the system firmware. And like a reboot
  1766. you can start any kernel with it, not just Linux.
  1767. It is an ongoing process to be certain the hardware in a machine
  1768. is properly shutdown, so do not be surprised if this code does not
  1769. initially work for you. It may help to enable device hotplugging
  1770. support.
  1771. config ATAGS_PROC
  1772. bool "Export atags in procfs"
  1773. depends on ATAGS && KEXEC
  1774. default y
  1775. help
  1776. Should the atags used to boot the kernel be exported in an "atags"
  1777. file in procfs. Useful with kexec.
  1778. config CRASH_DUMP
  1779. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1780. depends on EXPERIMENTAL
  1781. help
  1782. Generate crash dump after being started by kexec. This should
  1783. be normally only set in special crash dump kernels which are
  1784. loaded in the main kernel with kexec-tools into a specially
  1785. reserved region and then later executed after a crash by
  1786. kdump/kexec. The crash dump kernel must be compiled to a
  1787. memory address not used by the main kernel
  1788. For more details see Documentation/kdump/kdump.txt
  1789. config AUTO_ZRELADDR
  1790. bool "Auto calculation of the decompressed kernel image address"
  1791. depends on !ZBOOT_ROM && !ARCH_U300
  1792. help
  1793. ZRELADDR is the physical address where the decompressed kernel
  1794. image will be placed. If AUTO_ZRELADDR is selected, the address
  1795. will be determined at run-time by masking the current IP with
  1796. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1797. from start of memory.
  1798. endmenu
  1799. menu "CPU Power Management"
  1800. if ARCH_HAS_CPUFREQ
  1801. source "drivers/cpufreq/Kconfig"
  1802. config CPU_FREQ_IMX
  1803. tristate "CPUfreq driver for i.MX CPUs"
  1804. depends on ARCH_MXC && CPU_FREQ
  1805. select CPU_FREQ_TABLE
  1806. help
  1807. This enables the CPUfreq driver for i.MX CPUs.
  1808. config CPU_FREQ_SA1100
  1809. bool
  1810. config CPU_FREQ_SA1110
  1811. bool
  1812. config CPU_FREQ_INTEGRATOR
  1813. tristate "CPUfreq driver for ARM Integrator CPUs"
  1814. depends on ARCH_INTEGRATOR && CPU_FREQ
  1815. default y
  1816. help
  1817. This enables the CPUfreq driver for ARM Integrator CPUs.
  1818. For details, take a look at <file:Documentation/cpu-freq>.
  1819. If in doubt, say Y.
  1820. config CPU_FREQ_PXA
  1821. bool
  1822. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1823. default y
  1824. select CPU_FREQ_TABLE
  1825. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1826. config CPU_FREQ_S3C
  1827. bool
  1828. help
  1829. Internal configuration node for common cpufreq on Samsung SoC
  1830. config CPU_FREQ_S3C24XX
  1831. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1832. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1833. select CPU_FREQ_S3C
  1834. help
  1835. This enables the CPUfreq driver for the Samsung S3C24XX family
  1836. of CPUs.
  1837. For details, take a look at <file:Documentation/cpu-freq>.
  1838. If in doubt, say N.
  1839. config CPU_FREQ_S3C24XX_PLL
  1840. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1841. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1842. help
  1843. Compile in support for changing the PLL frequency from the
  1844. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1845. after a frequency change, so by default it is not enabled.
  1846. This also means that the PLL tables for the selected CPU(s) will
  1847. be built which may increase the size of the kernel image.
  1848. config CPU_FREQ_S3C24XX_DEBUG
  1849. bool "Debug CPUfreq Samsung driver core"
  1850. depends on CPU_FREQ_S3C24XX
  1851. help
  1852. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1853. config CPU_FREQ_S3C24XX_IODEBUG
  1854. bool "Debug CPUfreq Samsung driver IO timing"
  1855. depends on CPU_FREQ_S3C24XX
  1856. help
  1857. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1858. config CPU_FREQ_S3C24XX_DEBUGFS
  1859. bool "Export debugfs for CPUFreq"
  1860. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1861. help
  1862. Export status information via debugfs.
  1863. endif
  1864. source "drivers/cpuidle/Kconfig"
  1865. endmenu
  1866. menu "Floating point emulation"
  1867. comment "At least one emulation must be selected"
  1868. config FPE_NWFPE
  1869. bool "NWFPE math emulation"
  1870. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1871. ---help---
  1872. Say Y to include the NWFPE floating point emulator in the kernel.
  1873. This is necessary to run most binaries. Linux does not currently
  1874. support floating point hardware so you need to say Y here even if
  1875. your machine has an FPA or floating point co-processor podule.
  1876. You may say N here if you are going to load the Acorn FPEmulator
  1877. early in the bootup.
  1878. config FPE_NWFPE_XP
  1879. bool "Support extended precision"
  1880. depends on FPE_NWFPE
  1881. help
  1882. Say Y to include 80-bit support in the kernel floating-point
  1883. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1884. Note that gcc does not generate 80-bit operations by default,
  1885. so in most cases this option only enlarges the size of the
  1886. floating point emulator without any good reason.
  1887. You almost surely want to say N here.
  1888. config FPE_FASTFPE
  1889. bool "FastFPE math emulation (EXPERIMENTAL)"
  1890. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1891. ---help---
  1892. Say Y here to include the FAST floating point emulator in the kernel.
  1893. This is an experimental much faster emulator which now also has full
  1894. precision for the mantissa. It does not support any exceptions.
  1895. It is very simple, and approximately 3-6 times faster than NWFPE.
  1896. It should be sufficient for most programs. It may be not suitable
  1897. for scientific calculations, but you have to check this for yourself.
  1898. If you do not feel you need a faster FP emulation you should better
  1899. choose NWFPE.
  1900. config VFP
  1901. bool "VFP-format floating point maths"
  1902. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1903. help
  1904. Say Y to include VFP support code in the kernel. This is needed
  1905. if your hardware includes a VFP unit.
  1906. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1907. release notes and additional status information.
  1908. Say N if your target does not have VFP hardware.
  1909. config VFPv3
  1910. bool
  1911. depends on VFP
  1912. default y if CPU_V7
  1913. config NEON
  1914. bool "Advanced SIMD (NEON) Extension support"
  1915. depends on VFPv3 && CPU_V7
  1916. help
  1917. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1918. Extension.
  1919. endmenu
  1920. menu "Userspace binary formats"
  1921. source "fs/Kconfig.binfmt"
  1922. config ARTHUR
  1923. tristate "RISC OS personality"
  1924. depends on !AEABI
  1925. help
  1926. Say Y here to include the kernel code necessary if you want to run
  1927. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1928. experimental; if this sounds frightening, say N and sleep in peace.
  1929. You can also say M here to compile this support as a module (which
  1930. will be called arthur).
  1931. endmenu
  1932. menu "Power management options"
  1933. source "kernel/power/Kconfig"
  1934. config ARCH_SUSPEND_POSSIBLE
  1935. depends on !ARCH_S5PC100
  1936. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1937. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1938. def_bool y
  1939. config ARM_CPU_SUSPEND
  1940. def_bool PM_SLEEP
  1941. endmenu
  1942. source "net/Kconfig"
  1943. source "drivers/Kconfig"
  1944. source "fs/Kconfig"
  1945. source "arch/arm/Kconfig.debug"
  1946. source "security/Kconfig"
  1947. source "crypto/Kconfig"
  1948. source "lib/Kconfig"