Kconfig 67 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  5. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  6. select ARCH_HAVE_CUSTOM_GPIO_H
  7. select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  8. select ARCH_WANT_IPC_PARSE_VERSION
  9. select BUILDTIME_EXTABLE_SORT if MMU
  10. select CPU_PM if (SUSPEND || CPU_IDLE)
  11. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  12. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  13. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  14. select GENERIC_IRQ_PROBE
  15. select GENERIC_IRQ_SHOW
  16. select GENERIC_PCI_IOMAP
  17. select GENERIC_SMP_IDLE_THREAD
  18. select GENERIC_STRNCPY_FROM_USER
  19. select GENERIC_STRNLEN_USER
  20. select HARDIRQS_SW_RESEND
  21. select HAVE_AOUT
  22. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  23. select HAVE_ARCH_KGDB
  24. select HAVE_ARCH_SECCOMP_FILTER
  25. select HAVE_ARCH_TRACEHOOK
  26. select HAVE_BPF_JIT
  27. select HAVE_C_RECORDMCOUNT
  28. select HAVE_DEBUG_KMEMLEAK
  29. select HAVE_DMA_API_DEBUG
  30. select HAVE_DMA_ATTRS
  31. select HAVE_DMA_CONTIGUOUS if MMU
  32. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  33. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  34. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  35. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  36. select HAVE_GENERIC_DMA_COHERENT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  39. select HAVE_IDE if PCI || ISA || PCMCIA
  40. select HAVE_KERNEL_GZIP
  41. select HAVE_KERNEL_LZMA
  42. select HAVE_KERNEL_LZO
  43. select HAVE_KERNEL_XZ
  44. select HAVE_KPROBES if !XIP_KERNEL
  45. select HAVE_KRETPROBES if (HAVE_KPROBES)
  46. select HAVE_MEMBLOCK
  47. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  48. select HAVE_PERF_EVENTS
  49. select HAVE_REGS_AND_STACK_ACCESS_API
  50. select HAVE_SYSCALL_TRACEPOINTS
  51. select HAVE_UID16
  52. select KTIME_SCALAR
  53. select PERF_USE_VMALLOC
  54. select RTC_LIB
  55. select SYS_SUPPORTS_APM_EMULATION
  56. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  57. select MODULES_USE_ELF_REL
  58. select CLONE_BACKWARDS
  59. select OLD_SIGSUSPEND3
  60. select OLD_SIGACTION
  61. help
  62. The ARM series is a line of low-power-consumption RISC chip designs
  63. licensed by ARM Ltd and targeted at embedded applications and
  64. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  65. manufactured, but legacy ARM-based PC hardware remains popular in
  66. Europe. There is an ARM Linux project with a web page at
  67. <http://www.arm.linux.org.uk/>.
  68. config ARM_HAS_SG_CHAIN
  69. bool
  70. config NEED_SG_DMA_LENGTH
  71. bool
  72. config ARM_DMA_USE_IOMMU
  73. bool
  74. select ARM_HAS_SG_CHAIN
  75. select NEED_SG_DMA_LENGTH
  76. if ARM_DMA_USE_IOMMU
  77. config ARM_DMA_IOMMU_ALIGNMENT
  78. int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
  79. range 4 9
  80. default 8
  81. help
  82. DMA mapping framework by default aligns all buffers to the smallest
  83. PAGE_SIZE order which is greater than or equal to the requested buffer
  84. size. This works well for buffers up to a few hundreds kilobytes, but
  85. for larger buffers it just a waste of address space. Drivers which has
  86. relatively small addressing window (like 64Mib) might run out of
  87. virtual space with just a few allocations.
  88. With this parameter you can specify the maximum PAGE_SIZE order for
  89. DMA IOMMU buffers. Larger buffers will be aligned only to this
  90. specified order. The order is expressed as a power of two multiplied
  91. by the PAGE_SIZE.
  92. endif
  93. config HAVE_PWM
  94. bool
  95. config MIGHT_HAVE_PCI
  96. bool
  97. config SYS_SUPPORTS_APM_EMULATION
  98. bool
  99. config GENERIC_GPIO
  100. bool
  101. config HAVE_TCM
  102. bool
  103. select GENERIC_ALLOCATOR
  104. config HAVE_PROC_CPU
  105. bool
  106. config NO_IOPORT
  107. bool
  108. config EISA
  109. bool
  110. ---help---
  111. The Extended Industry Standard Architecture (EISA) bus was
  112. developed as an open alternative to the IBM MicroChannel bus.
  113. The EISA bus provided some of the features of the IBM MicroChannel
  114. bus while maintaining backward compatibility with cards made for
  115. the older ISA bus. The EISA bus saw limited use between 1988 and
  116. 1995 when it was made obsolete by the PCI bus.
  117. Say Y here if you are building a kernel for an EISA-based machine.
  118. Otherwise, say N.
  119. config SBUS
  120. bool
  121. config STACKTRACE_SUPPORT
  122. bool
  123. default y
  124. config HAVE_LATENCYTOP_SUPPORT
  125. bool
  126. depends on !SMP
  127. default y
  128. config LOCKDEP_SUPPORT
  129. bool
  130. default y
  131. config TRACE_IRQFLAGS_SUPPORT
  132. bool
  133. default y
  134. config RWSEM_GENERIC_SPINLOCK
  135. bool
  136. default y
  137. config RWSEM_XCHGADD_ALGORITHM
  138. bool
  139. config ARCH_HAS_ILOG2_U32
  140. bool
  141. config ARCH_HAS_ILOG2_U64
  142. bool
  143. config ARCH_HAS_CPUFREQ
  144. bool
  145. help
  146. Internal node to signify that the ARCH has CPUFREQ support
  147. and that the relevant menu configurations are displayed for
  148. it.
  149. config GENERIC_HWEIGHT
  150. bool
  151. default y
  152. config GENERIC_CALIBRATE_DELAY
  153. bool
  154. default y
  155. config ARCH_MAY_HAVE_PC_FDC
  156. bool
  157. config ZONE_DMA
  158. bool
  159. config NEED_DMA_MAP_STATE
  160. def_bool y
  161. config ARCH_HAS_DMA_SET_COHERENT_MASK
  162. bool
  163. config GENERIC_ISA_DMA
  164. bool
  165. config FIQ
  166. bool
  167. config NEED_RET_TO_USER
  168. bool
  169. config ARCH_MTD_XIP
  170. bool
  171. config VECTORS_BASE
  172. hex
  173. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  174. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  175. default 0x00000000
  176. help
  177. The base address of exception vectors.
  178. config ARM_PATCH_PHYS_VIRT
  179. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  180. default y
  181. depends on !XIP_KERNEL && MMU
  182. depends on !ARCH_REALVIEW || !SPARSEMEM
  183. help
  184. Patch phys-to-virt and virt-to-phys translation functions at
  185. boot and module load time according to the position of the
  186. kernel in system memory.
  187. This can only be used with non-XIP MMU kernels where the base
  188. of physical memory is at a 16MB boundary.
  189. Only disable this option if you know that you do not require
  190. this feature (eg, building a kernel for a single machine) and
  191. you need to shrink the kernel to the minimal size.
  192. config NEED_MACH_GPIO_H
  193. bool
  194. help
  195. Select this when mach/gpio.h is required to provide special
  196. definitions for this platform. The need for mach/gpio.h should
  197. be avoided when possible.
  198. config NEED_MACH_IO_H
  199. bool
  200. help
  201. Select this when mach/io.h is required to provide special
  202. definitions for this platform. The need for mach/io.h should
  203. be avoided when possible.
  204. config NEED_MACH_MEMORY_H
  205. bool
  206. help
  207. Select this when mach/memory.h is required to provide special
  208. definitions for this platform. The need for mach/memory.h should
  209. be avoided when possible.
  210. config PHYS_OFFSET
  211. hex "Physical address of main memory" if MMU
  212. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  213. default DRAM_BASE if !MMU
  214. help
  215. Please provide the physical address corresponding to the
  216. location of main memory in your system.
  217. config GENERIC_BUG
  218. def_bool y
  219. depends on BUG
  220. source "init/Kconfig"
  221. source "kernel/Kconfig.freezer"
  222. menu "System Type"
  223. config MMU
  224. bool "MMU-based Paged Memory Management Support"
  225. default y
  226. help
  227. Select if you want MMU-based virtualised addressing space
  228. support by paged memory management. If unsure, say 'Y'.
  229. #
  230. # The "ARM system type" choice list is ordered alphabetically by option
  231. # text. Please add new entries in the option alphabetic order.
  232. #
  233. choice
  234. prompt "ARM system type"
  235. default ARCH_VERSATILE if !MMU
  236. default ARCH_MULTIPLATFORM if MMU
  237. config ARCH_MULTIPLATFORM
  238. bool "Allow multiple platforms to be selected"
  239. depends on MMU
  240. select ARM_PATCH_PHYS_VIRT
  241. select AUTO_ZRELADDR
  242. select COMMON_CLK
  243. select MULTI_IRQ_HANDLER
  244. select SPARSE_IRQ
  245. select USE_OF
  246. config ARCH_INTEGRATOR
  247. bool "ARM Ltd. Integrator family"
  248. select ARCH_HAS_CPUFREQ
  249. select ARM_AMBA
  250. select COMMON_CLK
  251. select COMMON_CLK_VERSATILE
  252. select GENERIC_CLOCKEVENTS
  253. select HAVE_TCM
  254. select ICST
  255. select MULTI_IRQ_HANDLER
  256. select NEED_MACH_MEMORY_H
  257. select PLAT_VERSATILE
  258. select SPARSE_IRQ
  259. select VERSATILE_FPGA_IRQ
  260. help
  261. Support for ARM's Integrator platform.
  262. config ARCH_REALVIEW
  263. bool "ARM Ltd. RealView family"
  264. select ARCH_WANT_OPTIONAL_GPIOLIB
  265. select ARM_AMBA
  266. select ARM_TIMER_SP804
  267. select COMMON_CLK
  268. select COMMON_CLK_VERSATILE
  269. select GENERIC_CLOCKEVENTS
  270. select GPIO_PL061 if GPIOLIB
  271. select ICST
  272. select NEED_MACH_MEMORY_H
  273. select PLAT_VERSATILE
  274. select PLAT_VERSATILE_CLCD
  275. help
  276. This enables support for ARM Ltd RealView boards.
  277. config ARCH_VERSATILE
  278. bool "ARM Ltd. Versatile family"
  279. select ARCH_WANT_OPTIONAL_GPIOLIB
  280. select ARM_AMBA
  281. select ARM_TIMER_SP804
  282. select ARM_VIC
  283. select CLKDEV_LOOKUP
  284. select GENERIC_CLOCKEVENTS
  285. select HAVE_MACH_CLKDEV
  286. select ICST
  287. select PLAT_VERSATILE
  288. select PLAT_VERSATILE_CLCD
  289. select PLAT_VERSATILE_CLOCK
  290. select VERSATILE_FPGA_IRQ
  291. help
  292. This enables support for ARM Ltd Versatile board.
  293. config ARCH_AT91
  294. bool "Atmel AT91"
  295. select ARCH_REQUIRE_GPIOLIB
  296. select CLKDEV_LOOKUP
  297. select HAVE_CLK
  298. select IRQ_DOMAIN
  299. select NEED_MACH_GPIO_H
  300. select NEED_MACH_IO_H if PCCARD
  301. select PINCTRL
  302. select PINCTRL_AT91 if USE_OF
  303. help
  304. This enables support for systems based on Atmel
  305. AT91RM9200 and AT91SAM9* processors.
  306. config ARCH_BCM2835
  307. bool "Broadcom BCM2835 family"
  308. select ARCH_REQUIRE_GPIOLIB
  309. select ARM_AMBA
  310. select ARM_ERRATA_411920
  311. select ARM_TIMER_SP804
  312. select CLKDEV_LOOKUP
  313. select CLKSRC_OF
  314. select COMMON_CLK
  315. select CPU_V6
  316. select GENERIC_CLOCKEVENTS
  317. select MULTI_IRQ_HANDLER
  318. select PINCTRL
  319. select PINCTRL_BCM2835
  320. select SPARSE_IRQ
  321. select USE_OF
  322. help
  323. This enables support for the Broadcom BCM2835 SoC. This SoC is
  324. use in the Raspberry Pi, and Roku 2 devices.
  325. config ARCH_CNS3XXX
  326. bool "Cavium Networks CNS3XXX family"
  327. select ARM_GIC
  328. select CPU_V6K
  329. select GENERIC_CLOCKEVENTS
  330. select MIGHT_HAVE_CACHE_L2X0
  331. select MIGHT_HAVE_PCI
  332. select PCI_DOMAINS if PCI
  333. help
  334. Support for Cavium Networks CNS3XXX platform.
  335. config ARCH_CLPS711X
  336. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  337. select ARCH_REQUIRE_GPIOLIB
  338. select AUTO_ZRELADDR
  339. select CLKDEV_LOOKUP
  340. select COMMON_CLK
  341. select CPU_ARM720T
  342. select GENERIC_CLOCKEVENTS
  343. select MULTI_IRQ_HANDLER
  344. select NEED_MACH_MEMORY_H
  345. select SPARSE_IRQ
  346. help
  347. Support for Cirrus Logic 711x/721x/731x based boards.
  348. config ARCH_GEMINI
  349. bool "Cortina Systems Gemini"
  350. select ARCH_REQUIRE_GPIOLIB
  351. select ARCH_USES_GETTIMEOFFSET
  352. select CPU_FA526
  353. help
  354. Support for the Cortina Systems Gemini family SoCs
  355. config ARCH_SIRF
  356. bool "CSR SiRF"
  357. select ARCH_REQUIRE_GPIOLIB
  358. select AUTO_ZRELADDR
  359. select COMMON_CLK
  360. select GENERIC_CLOCKEVENTS
  361. select GENERIC_IRQ_CHIP
  362. select MIGHT_HAVE_CACHE_L2X0
  363. select NO_IOPORT
  364. select PINCTRL
  365. select PINCTRL_SIRF
  366. select USE_OF
  367. help
  368. Support for CSR SiRFprimaII/Marco/Polo platforms
  369. config ARCH_EBSA110
  370. bool "EBSA-110"
  371. select ARCH_USES_GETTIMEOFFSET
  372. select CPU_SA110
  373. select ISA
  374. select NEED_MACH_IO_H
  375. select NEED_MACH_MEMORY_H
  376. select NO_IOPORT
  377. help
  378. This is an evaluation board for the StrongARM processor available
  379. from Digital. It has limited hardware on-board, including an
  380. Ethernet interface, two PCMCIA sockets, two serial ports and a
  381. parallel port.
  382. config ARCH_EP93XX
  383. bool "EP93xx-based"
  384. select ARCH_HAS_HOLES_MEMORYMODEL
  385. select ARCH_REQUIRE_GPIOLIB
  386. select ARCH_USES_GETTIMEOFFSET
  387. select ARM_AMBA
  388. select ARM_VIC
  389. select CLKDEV_LOOKUP
  390. select CPU_ARM920T
  391. select NEED_MACH_MEMORY_H
  392. help
  393. This enables support for the Cirrus EP93xx series of CPUs.
  394. config ARCH_FOOTBRIDGE
  395. bool "FootBridge"
  396. select CPU_SA110
  397. select FOOTBRIDGE
  398. select GENERIC_CLOCKEVENTS
  399. select HAVE_IDE
  400. select NEED_MACH_IO_H if !MMU
  401. select NEED_MACH_MEMORY_H
  402. help
  403. Support for systems based on the DC21285 companion chip
  404. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  405. config ARCH_MXS
  406. bool "Freescale MXS-based"
  407. select ARCH_REQUIRE_GPIOLIB
  408. select CLKDEV_LOOKUP
  409. select CLKSRC_MMIO
  410. select COMMON_CLK
  411. select GENERIC_CLOCKEVENTS
  412. select HAVE_CLK_PREPARE
  413. select MULTI_IRQ_HANDLER
  414. select PINCTRL
  415. select SPARSE_IRQ
  416. select USE_OF
  417. help
  418. Support for Freescale MXS-based family of processors
  419. config ARCH_NETX
  420. bool "Hilscher NetX based"
  421. select ARM_VIC
  422. select CLKSRC_MMIO
  423. select CPU_ARM926T
  424. select GENERIC_CLOCKEVENTS
  425. help
  426. This enables support for systems based on the Hilscher NetX Soc
  427. config ARCH_H720X
  428. bool "Hynix HMS720x-based"
  429. select ARCH_USES_GETTIMEOFFSET
  430. select CPU_ARM720T
  431. select ISA_DMA_API
  432. help
  433. This enables support for systems based on the Hynix HMS720x
  434. config ARCH_IOP13XX
  435. bool "IOP13xx-based"
  436. depends on MMU
  437. select ARCH_SUPPORTS_MSI
  438. select CPU_XSC3
  439. select NEED_MACH_MEMORY_H
  440. select NEED_RET_TO_USER
  441. select PCI
  442. select PLAT_IOP
  443. select VMSPLIT_1G
  444. help
  445. Support for Intel's IOP13XX (XScale) family of processors.
  446. config ARCH_IOP32X
  447. bool "IOP32x-based"
  448. depends on MMU
  449. select ARCH_REQUIRE_GPIOLIB
  450. select CPU_XSCALE
  451. select NEED_MACH_GPIO_H
  452. select NEED_RET_TO_USER
  453. select PCI
  454. select PLAT_IOP
  455. help
  456. Support for Intel's 80219 and IOP32X (XScale) family of
  457. processors.
  458. config ARCH_IOP33X
  459. bool "IOP33x-based"
  460. depends on MMU
  461. select ARCH_REQUIRE_GPIOLIB
  462. select CPU_XSCALE
  463. select NEED_MACH_GPIO_H
  464. select NEED_RET_TO_USER
  465. select PCI
  466. select PLAT_IOP
  467. help
  468. Support for Intel's IOP33X (XScale) family of processors.
  469. config ARCH_IXP4XX
  470. bool "IXP4xx-based"
  471. depends on MMU
  472. select ARCH_HAS_DMA_SET_COHERENT_MASK
  473. select ARCH_REQUIRE_GPIOLIB
  474. select CLKSRC_MMIO
  475. select CPU_XSCALE
  476. select DMABOUNCE if PCI
  477. select GENERIC_CLOCKEVENTS
  478. select MIGHT_HAVE_PCI
  479. select NEED_MACH_IO_H
  480. help
  481. Support for Intel's IXP4XX (XScale) family of processors.
  482. config ARCH_DOVE
  483. bool "Marvell Dove"
  484. select ARCH_REQUIRE_GPIOLIB
  485. select CPU_V7
  486. select GENERIC_CLOCKEVENTS
  487. select MIGHT_HAVE_PCI
  488. select PINCTRL
  489. select PINCTRL_DOVE
  490. select PLAT_ORION_LEGACY
  491. select USB_ARCH_HAS_EHCI
  492. help
  493. Support for the Marvell Dove SoC 88AP510
  494. config ARCH_KIRKWOOD
  495. bool "Marvell Kirkwood"
  496. select ARCH_REQUIRE_GPIOLIB
  497. select CPU_FEROCEON
  498. select GENERIC_CLOCKEVENTS
  499. select PCI
  500. select PCI_QUIRKS
  501. select PINCTRL
  502. select PINCTRL_KIRKWOOD
  503. select PLAT_ORION_LEGACY
  504. help
  505. Support for the following Marvell Kirkwood series SoCs:
  506. 88F6180, 88F6192 and 88F6281.
  507. config ARCH_MV78XX0
  508. bool "Marvell MV78xx0"
  509. select ARCH_REQUIRE_GPIOLIB
  510. select CPU_FEROCEON
  511. select GENERIC_CLOCKEVENTS
  512. select PCI
  513. select PLAT_ORION_LEGACY
  514. help
  515. Support for the following Marvell MV78xx0 series SoCs:
  516. MV781x0, MV782x0.
  517. config ARCH_ORION5X
  518. bool "Marvell Orion"
  519. depends on MMU
  520. select ARCH_REQUIRE_GPIOLIB
  521. select CPU_FEROCEON
  522. select GENERIC_CLOCKEVENTS
  523. select PCI
  524. select PLAT_ORION_LEGACY
  525. help
  526. Support for the following Marvell Orion 5x series SoCs:
  527. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  528. Orion-2 (5281), Orion-1-90 (6183).
  529. config ARCH_MMP
  530. bool "Marvell PXA168/910/MMP2"
  531. depends on MMU
  532. select ARCH_REQUIRE_GPIOLIB
  533. select CLKDEV_LOOKUP
  534. select GENERIC_ALLOCATOR
  535. select GENERIC_CLOCKEVENTS
  536. select GPIO_PXA
  537. select IRQ_DOMAIN
  538. select NEED_MACH_GPIO_H
  539. select PINCTRL
  540. select PLAT_PXA
  541. select SPARSE_IRQ
  542. help
  543. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  544. config ARCH_KS8695
  545. bool "Micrel/Kendin KS8695"
  546. select ARCH_REQUIRE_GPIOLIB
  547. select CLKSRC_MMIO
  548. select CPU_ARM922T
  549. select GENERIC_CLOCKEVENTS
  550. select NEED_MACH_MEMORY_H
  551. help
  552. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  553. System-on-Chip devices.
  554. config ARCH_W90X900
  555. bool "Nuvoton W90X900 CPU"
  556. select ARCH_REQUIRE_GPIOLIB
  557. select CLKDEV_LOOKUP
  558. select CLKSRC_MMIO
  559. select CPU_ARM926T
  560. select GENERIC_CLOCKEVENTS
  561. help
  562. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  563. At present, the w90x900 has been renamed nuc900, regarding
  564. the ARM series product line, you can login the following
  565. link address to know more.
  566. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  567. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  568. config ARCH_LPC32XX
  569. bool "NXP LPC32XX"
  570. select ARCH_REQUIRE_GPIOLIB
  571. select ARM_AMBA
  572. select CLKDEV_LOOKUP
  573. select CLKSRC_MMIO
  574. select CPU_ARM926T
  575. select GENERIC_CLOCKEVENTS
  576. select HAVE_IDE
  577. select HAVE_PWM
  578. select USB_ARCH_HAS_OHCI
  579. select USE_OF
  580. help
  581. Support for the NXP LPC32XX family of processors
  582. config ARCH_TEGRA
  583. bool "NVIDIA Tegra"
  584. select ARCH_HAS_CPUFREQ
  585. select ARCH_REQUIRE_GPIOLIB
  586. select CLKDEV_LOOKUP
  587. select CLKSRC_MMIO
  588. select CLKSRC_OF
  589. select COMMON_CLK
  590. select GENERIC_CLOCKEVENTS
  591. select HAVE_CLK
  592. select HAVE_SMP
  593. select MIGHT_HAVE_CACHE_L2X0
  594. select SPARSE_IRQ
  595. select USE_OF
  596. help
  597. This enables support for NVIDIA Tegra based systems (Tegra APX,
  598. Tegra 6xx and Tegra 2 series).
  599. config ARCH_PXA
  600. bool "PXA2xx/PXA3xx-based"
  601. depends on MMU
  602. select ARCH_HAS_CPUFREQ
  603. select ARCH_MTD_XIP
  604. select ARCH_REQUIRE_GPIOLIB
  605. select ARM_CPU_SUSPEND if PM
  606. select AUTO_ZRELADDR
  607. select CLKDEV_LOOKUP
  608. select CLKSRC_MMIO
  609. select GENERIC_CLOCKEVENTS
  610. select GPIO_PXA
  611. select HAVE_IDE
  612. select MULTI_IRQ_HANDLER
  613. select NEED_MACH_GPIO_H
  614. select PLAT_PXA
  615. select SPARSE_IRQ
  616. help
  617. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  618. config ARCH_MSM
  619. bool "Qualcomm MSM"
  620. select ARCH_REQUIRE_GPIOLIB
  621. select CLKDEV_LOOKUP
  622. select GENERIC_CLOCKEVENTS
  623. select HAVE_CLK
  624. help
  625. Support for Qualcomm MSM/QSD based systems. This runs on the
  626. apps processor of the MSM/QSD and depends on a shared memory
  627. interface to the modem processor which runs the baseband
  628. stack and controls some vital subsystems
  629. (clock and power control, etc).
  630. config ARCH_SHMOBILE
  631. bool "Renesas SH-Mobile / R-Mobile"
  632. select CLKDEV_LOOKUP
  633. select GENERIC_CLOCKEVENTS
  634. select HAVE_CLK
  635. select HAVE_MACH_CLKDEV
  636. select HAVE_SMP
  637. select MIGHT_HAVE_CACHE_L2X0
  638. select MULTI_IRQ_HANDLER
  639. select NEED_MACH_MEMORY_H
  640. select NO_IOPORT
  641. select PINCTRL
  642. select PM_GENERIC_DOMAINS if PM
  643. select SPARSE_IRQ
  644. help
  645. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  646. config ARCH_RPC
  647. bool "RiscPC"
  648. select ARCH_ACORN
  649. select ARCH_MAY_HAVE_PC_FDC
  650. select ARCH_SPARSEMEM_ENABLE
  651. select ARCH_USES_GETTIMEOFFSET
  652. select FIQ
  653. select HAVE_IDE
  654. select HAVE_PATA_PLATFORM
  655. select ISA_DMA_API
  656. select NEED_MACH_IO_H
  657. select NEED_MACH_MEMORY_H
  658. select NO_IOPORT
  659. select VIRT_TO_BUS
  660. help
  661. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  662. CD-ROM interface, serial and parallel port, and the floppy drive.
  663. config ARCH_SA1100
  664. bool "SA1100-based"
  665. select ARCH_HAS_CPUFREQ
  666. select ARCH_MTD_XIP
  667. select ARCH_REQUIRE_GPIOLIB
  668. select ARCH_SPARSEMEM_ENABLE
  669. select CLKDEV_LOOKUP
  670. select CLKSRC_MMIO
  671. select CPU_FREQ
  672. select CPU_SA1100
  673. select GENERIC_CLOCKEVENTS
  674. select HAVE_IDE
  675. select ISA
  676. select NEED_MACH_GPIO_H
  677. select NEED_MACH_MEMORY_H
  678. select SPARSE_IRQ
  679. help
  680. Support for StrongARM 11x0 based boards.
  681. config ARCH_S3C24XX
  682. bool "Samsung S3C24XX SoCs"
  683. select ARCH_HAS_CPUFREQ
  684. select ARCH_USES_GETTIMEOFFSET
  685. select CLKDEV_LOOKUP
  686. select HAVE_CLK
  687. select HAVE_S3C2410_I2C if I2C
  688. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  689. select HAVE_S3C_RTC if RTC_CLASS
  690. select NEED_MACH_GPIO_H
  691. select NEED_MACH_IO_H
  692. help
  693. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  694. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  695. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  696. Samsung SMDK2410 development board (and derivatives).
  697. config ARCH_S3C64XX
  698. bool "Samsung S3C64XX"
  699. select ARCH_HAS_CPUFREQ
  700. select ARCH_REQUIRE_GPIOLIB
  701. select ARCH_USES_GETTIMEOFFSET
  702. select ARM_VIC
  703. select CLKDEV_LOOKUP
  704. select CPU_V6
  705. select HAVE_CLK
  706. select HAVE_S3C2410_I2C if I2C
  707. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  708. select HAVE_TCM
  709. select NEED_MACH_GPIO_H
  710. select NO_IOPORT
  711. select PLAT_SAMSUNG
  712. select S3C_DEV_NAND
  713. select S3C_GPIO_TRACK
  714. select SAMSUNG_CLKSRC
  715. select SAMSUNG_GPIOLIB_4BIT
  716. select SAMSUNG_IRQ_VIC_TIMER
  717. select USB_ARCH_HAS_OHCI
  718. help
  719. Samsung S3C64XX series based systems
  720. config ARCH_S5P64X0
  721. bool "Samsung S5P6440 S5P6450"
  722. select CLKDEV_LOOKUP
  723. select CLKSRC_MMIO
  724. select CPU_V6
  725. select GENERIC_CLOCKEVENTS
  726. select HAVE_CLK
  727. select HAVE_S3C2410_I2C if I2C
  728. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  729. select HAVE_S3C_RTC if RTC_CLASS
  730. select NEED_MACH_GPIO_H
  731. help
  732. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  733. SMDK6450.
  734. config ARCH_S5PC100
  735. bool "Samsung S5PC100"
  736. select ARCH_USES_GETTIMEOFFSET
  737. select CLKDEV_LOOKUP
  738. select CPU_V7
  739. select HAVE_CLK
  740. select HAVE_S3C2410_I2C if I2C
  741. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  742. select HAVE_S3C_RTC if RTC_CLASS
  743. select NEED_MACH_GPIO_H
  744. help
  745. Samsung S5PC100 series based systems
  746. config ARCH_S5PV210
  747. bool "Samsung S5PV210/S5PC110"
  748. select ARCH_HAS_CPUFREQ
  749. select ARCH_HAS_HOLES_MEMORYMODEL
  750. select ARCH_SPARSEMEM_ENABLE
  751. select CLKDEV_LOOKUP
  752. select CLKSRC_MMIO
  753. select CPU_V7
  754. select GENERIC_CLOCKEVENTS
  755. select HAVE_CLK
  756. select HAVE_S3C2410_I2C if I2C
  757. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  758. select HAVE_S3C_RTC if RTC_CLASS
  759. select NEED_MACH_GPIO_H
  760. select NEED_MACH_MEMORY_H
  761. help
  762. Samsung S5PV210/S5PC110 series based systems
  763. config ARCH_EXYNOS
  764. bool "Samsung EXYNOS"
  765. select ARCH_HAS_CPUFREQ
  766. select ARCH_HAS_HOLES_MEMORYMODEL
  767. select ARCH_SPARSEMEM_ENABLE
  768. select CLKDEV_LOOKUP
  769. select CPU_V7
  770. select GENERIC_CLOCKEVENTS
  771. select HAVE_CLK
  772. select HAVE_S3C2410_I2C if I2C
  773. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  774. select HAVE_S3C_RTC if RTC_CLASS
  775. select NEED_MACH_GPIO_H
  776. select NEED_MACH_MEMORY_H
  777. help
  778. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  779. config ARCH_SHARK
  780. bool "Shark"
  781. select ARCH_USES_GETTIMEOFFSET
  782. select CPU_SA110
  783. select ISA
  784. select ISA_DMA
  785. select NEED_MACH_MEMORY_H
  786. select PCI
  787. select VIRT_TO_BUS
  788. select ZONE_DMA
  789. help
  790. Support for the StrongARM based Digital DNARD machine, also known
  791. as "Shark" (<http://www.shark-linux.de/shark.html>).
  792. config ARCH_U300
  793. bool "ST-Ericsson U300 Series"
  794. depends on MMU
  795. select ARCH_REQUIRE_GPIOLIB
  796. select ARM_AMBA
  797. select ARM_PATCH_PHYS_VIRT
  798. select ARM_VIC
  799. select CLKDEV_LOOKUP
  800. select CLKSRC_MMIO
  801. select COMMON_CLK
  802. select CPU_ARM926T
  803. select GENERIC_CLOCKEVENTS
  804. select HAVE_TCM
  805. select SPARSE_IRQ
  806. help
  807. Support for ST-Ericsson U300 series mobile platforms.
  808. config ARCH_U8500
  809. bool "ST-Ericsson U8500 Series"
  810. depends on MMU
  811. select ARCH_HAS_CPUFREQ
  812. select ARCH_REQUIRE_GPIOLIB
  813. select ARM_AMBA
  814. select CLKDEV_LOOKUP
  815. select CPU_V7
  816. select GENERIC_CLOCKEVENTS
  817. select HAVE_SMP
  818. select MIGHT_HAVE_CACHE_L2X0
  819. select SPARSE_IRQ
  820. help
  821. Support for ST-Ericsson's Ux500 architecture
  822. config ARCH_NOMADIK
  823. bool "STMicroelectronics Nomadik"
  824. select ARCH_REQUIRE_GPIOLIB
  825. select ARM_AMBA
  826. select ARM_VIC
  827. select CLKSRC_NOMADIK_MTU
  828. select COMMON_CLK
  829. select CPU_ARM926T
  830. select GENERIC_CLOCKEVENTS
  831. select MIGHT_HAVE_CACHE_L2X0
  832. select USE_OF
  833. select PINCTRL
  834. select PINCTRL_STN8815
  835. select SPARSE_IRQ
  836. help
  837. Support for the Nomadik platform by ST-Ericsson
  838. config PLAT_SPEAR
  839. bool "ST SPEAr"
  840. select ARCH_HAS_CPUFREQ
  841. select ARCH_REQUIRE_GPIOLIB
  842. select ARM_AMBA
  843. select CLKDEV_LOOKUP
  844. select CLKSRC_MMIO
  845. select COMMON_CLK
  846. select GENERIC_CLOCKEVENTS
  847. select HAVE_CLK
  848. help
  849. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  850. config ARCH_DAVINCI
  851. bool "TI DaVinci"
  852. select ARCH_HAS_HOLES_MEMORYMODEL
  853. select ARCH_REQUIRE_GPIOLIB
  854. select CLKDEV_LOOKUP
  855. select GENERIC_ALLOCATOR
  856. select GENERIC_CLOCKEVENTS
  857. select GENERIC_IRQ_CHIP
  858. select HAVE_IDE
  859. select NEED_MACH_GPIO_H
  860. select USE_OF
  861. select ZONE_DMA
  862. help
  863. Support for TI's DaVinci platform.
  864. config ARCH_OMAP1
  865. bool "TI OMAP1"
  866. depends on MMU
  867. select ARCH_HAS_CPUFREQ
  868. select ARCH_HAS_HOLES_MEMORYMODEL
  869. select ARCH_OMAP
  870. select ARCH_REQUIRE_GPIOLIB
  871. select CLKDEV_LOOKUP
  872. select CLKSRC_MMIO
  873. select GENERIC_CLOCKEVENTS
  874. select GENERIC_IRQ_CHIP
  875. select HAVE_CLK
  876. select HAVE_IDE
  877. select IRQ_DOMAIN
  878. select NEED_MACH_IO_H if PCCARD
  879. select NEED_MACH_MEMORY_H
  880. help
  881. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  882. endchoice
  883. menu "Multiple platform selection"
  884. depends on ARCH_MULTIPLATFORM
  885. comment "CPU Core family selection"
  886. config ARCH_MULTI_V4
  887. bool "ARMv4 based platforms (FA526, StrongARM)"
  888. depends on !ARCH_MULTI_V6_V7
  889. select ARCH_MULTI_V4_V5
  890. config ARCH_MULTI_V4T
  891. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  892. depends on !ARCH_MULTI_V6_V7
  893. select ARCH_MULTI_V4_V5
  894. config ARCH_MULTI_V5
  895. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  896. depends on !ARCH_MULTI_V6_V7
  897. select ARCH_MULTI_V4_V5
  898. config ARCH_MULTI_V4_V5
  899. bool
  900. config ARCH_MULTI_V6
  901. bool "ARMv6 based platforms (ARM11)"
  902. select ARCH_MULTI_V6_V7
  903. select CPU_V6
  904. config ARCH_MULTI_V7
  905. bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
  906. default y
  907. select ARCH_MULTI_V6_V7
  908. select ARCH_VEXPRESS
  909. select CPU_V7
  910. config ARCH_MULTI_V6_V7
  911. bool
  912. config ARCH_MULTI_CPU_AUTO
  913. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  914. select ARCH_MULTI_V5
  915. endmenu
  916. #
  917. # This is sorted alphabetically by mach-* pathname. However, plat-*
  918. # Kconfigs may be included either alphabetically (according to the
  919. # plat- suffix) or along side the corresponding mach-* source.
  920. #
  921. source "arch/arm/mach-mvebu/Kconfig"
  922. source "arch/arm/mach-at91/Kconfig"
  923. source "arch/arm/mach-bcm/Kconfig"
  924. source "arch/arm/mach-clps711x/Kconfig"
  925. source "arch/arm/mach-cns3xxx/Kconfig"
  926. source "arch/arm/mach-davinci/Kconfig"
  927. source "arch/arm/mach-dove/Kconfig"
  928. source "arch/arm/mach-ep93xx/Kconfig"
  929. source "arch/arm/mach-footbridge/Kconfig"
  930. source "arch/arm/mach-gemini/Kconfig"
  931. source "arch/arm/mach-h720x/Kconfig"
  932. source "arch/arm/mach-highbank/Kconfig"
  933. source "arch/arm/mach-integrator/Kconfig"
  934. source "arch/arm/mach-iop32x/Kconfig"
  935. source "arch/arm/mach-iop33x/Kconfig"
  936. source "arch/arm/mach-iop13xx/Kconfig"
  937. source "arch/arm/mach-ixp4xx/Kconfig"
  938. source "arch/arm/mach-kirkwood/Kconfig"
  939. source "arch/arm/mach-ks8695/Kconfig"
  940. source "arch/arm/mach-msm/Kconfig"
  941. source "arch/arm/mach-mv78xx0/Kconfig"
  942. source "arch/arm/mach-imx/Kconfig"
  943. source "arch/arm/mach-mxs/Kconfig"
  944. source "arch/arm/mach-netx/Kconfig"
  945. source "arch/arm/mach-nomadik/Kconfig"
  946. source "arch/arm/plat-omap/Kconfig"
  947. source "arch/arm/mach-omap1/Kconfig"
  948. source "arch/arm/mach-omap2/Kconfig"
  949. source "arch/arm/mach-orion5x/Kconfig"
  950. source "arch/arm/mach-picoxcell/Kconfig"
  951. source "arch/arm/mach-pxa/Kconfig"
  952. source "arch/arm/plat-pxa/Kconfig"
  953. source "arch/arm/mach-mmp/Kconfig"
  954. source "arch/arm/mach-realview/Kconfig"
  955. source "arch/arm/mach-sa1100/Kconfig"
  956. source "arch/arm/plat-samsung/Kconfig"
  957. source "arch/arm/mach-socfpga/Kconfig"
  958. source "arch/arm/plat-spear/Kconfig"
  959. source "arch/arm/mach-s3c24xx/Kconfig"
  960. if ARCH_S3C64XX
  961. source "arch/arm/mach-s3c64xx/Kconfig"
  962. endif
  963. source "arch/arm/mach-s5p64x0/Kconfig"
  964. source "arch/arm/mach-s5pc100/Kconfig"
  965. source "arch/arm/mach-s5pv210/Kconfig"
  966. source "arch/arm/mach-exynos/Kconfig"
  967. source "arch/arm/mach-shmobile/Kconfig"
  968. source "arch/arm/mach-sunxi/Kconfig"
  969. source "arch/arm/mach-prima2/Kconfig"
  970. source "arch/arm/mach-tegra/Kconfig"
  971. source "arch/arm/mach-u300/Kconfig"
  972. source "arch/arm/mach-ux500/Kconfig"
  973. source "arch/arm/mach-versatile/Kconfig"
  974. source "arch/arm/mach-vexpress/Kconfig"
  975. source "arch/arm/plat-versatile/Kconfig"
  976. source "arch/arm/mach-virt/Kconfig"
  977. source "arch/arm/mach-vt8500/Kconfig"
  978. source "arch/arm/mach-w90x900/Kconfig"
  979. source "arch/arm/mach-zynq/Kconfig"
  980. # Definitions to make life easier
  981. config ARCH_ACORN
  982. bool
  983. config PLAT_IOP
  984. bool
  985. select GENERIC_CLOCKEVENTS
  986. config PLAT_ORION
  987. bool
  988. select CLKSRC_MMIO
  989. select COMMON_CLK
  990. select GENERIC_IRQ_CHIP
  991. select IRQ_DOMAIN
  992. config PLAT_ORION_LEGACY
  993. bool
  994. select PLAT_ORION
  995. config PLAT_PXA
  996. bool
  997. config PLAT_VERSATILE
  998. bool
  999. config ARM_TIMER_SP804
  1000. bool
  1001. select CLKSRC_MMIO
  1002. select HAVE_SCHED_CLOCK
  1003. source arch/arm/mm/Kconfig
  1004. config ARM_NR_BANKS
  1005. int
  1006. default 16 if ARCH_EP93XX
  1007. default 8
  1008. config IWMMXT
  1009. bool "Enable iWMMXt support"
  1010. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1011. default y if PXA27x || PXA3xx || ARCH_MMP
  1012. help
  1013. Enable support for iWMMXt context switching at run time if
  1014. running on a CPU that supports it.
  1015. config XSCALE_PMU
  1016. bool
  1017. depends on CPU_XSCALE
  1018. default y
  1019. config MULTI_IRQ_HANDLER
  1020. bool
  1021. help
  1022. Allow each machine to specify it's own IRQ handler at run time.
  1023. if !MMU
  1024. source "arch/arm/Kconfig-nommu"
  1025. endif
  1026. config ARM_ERRATA_326103
  1027. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1028. depends on CPU_V6
  1029. help
  1030. Executing a SWP instruction to read-only memory does not set bit 11
  1031. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1032. treat the access as a read, preventing a COW from occurring and
  1033. causing the faulting task to livelock.
  1034. config ARM_ERRATA_411920
  1035. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1036. depends on CPU_V6 || CPU_V6K
  1037. help
  1038. Invalidation of the Instruction Cache operation can
  1039. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1040. It does not affect the MPCore. This option enables the ARM Ltd.
  1041. recommended workaround.
  1042. config ARM_ERRATA_430973
  1043. bool "ARM errata: Stale prediction on replaced interworking branch"
  1044. depends on CPU_V7
  1045. help
  1046. This option enables the workaround for the 430973 Cortex-A8
  1047. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1048. interworking branch is replaced with another code sequence at the
  1049. same virtual address, whether due to self-modifying code or virtual
  1050. to physical address re-mapping, Cortex-A8 does not recover from the
  1051. stale interworking branch prediction. This results in Cortex-A8
  1052. executing the new code sequence in the incorrect ARM or Thumb state.
  1053. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1054. and also flushes the branch target cache at every context switch.
  1055. Note that setting specific bits in the ACTLR register may not be
  1056. available in non-secure mode.
  1057. config ARM_ERRATA_458693
  1058. bool "ARM errata: Processor deadlock when a false hazard is created"
  1059. depends on CPU_V7
  1060. depends on !ARCH_MULTIPLATFORM
  1061. help
  1062. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1063. erratum. For very specific sequences of memory operations, it is
  1064. possible for a hazard condition intended for a cache line to instead
  1065. be incorrectly associated with a different cache line. This false
  1066. hazard might then cause a processor deadlock. The workaround enables
  1067. the L1 caching of the NEON accesses and disables the PLD instruction
  1068. in the ACTLR register. Note that setting specific bits in the ACTLR
  1069. register may not be available in non-secure mode.
  1070. config ARM_ERRATA_460075
  1071. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1072. depends on CPU_V7
  1073. depends on !ARCH_MULTIPLATFORM
  1074. help
  1075. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1076. erratum. Any asynchronous access to the L2 cache may encounter a
  1077. situation in which recent store transactions to the L2 cache are lost
  1078. and overwritten with stale memory contents from external memory. The
  1079. workaround disables the write-allocate mode for the L2 cache via the
  1080. ACTLR register. Note that setting specific bits in the ACTLR register
  1081. may not be available in non-secure mode.
  1082. config ARM_ERRATA_742230
  1083. bool "ARM errata: DMB operation may be faulty"
  1084. depends on CPU_V7 && SMP
  1085. depends on !ARCH_MULTIPLATFORM
  1086. help
  1087. This option enables the workaround for the 742230 Cortex-A9
  1088. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1089. between two write operations may not ensure the correct visibility
  1090. ordering of the two writes. This workaround sets a specific bit in
  1091. the diagnostic register of the Cortex-A9 which causes the DMB
  1092. instruction to behave as a DSB, ensuring the correct behaviour of
  1093. the two writes.
  1094. config ARM_ERRATA_742231
  1095. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1096. depends on CPU_V7 && SMP
  1097. depends on !ARCH_MULTIPLATFORM
  1098. help
  1099. This option enables the workaround for the 742231 Cortex-A9
  1100. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1101. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1102. accessing some data located in the same cache line, may get corrupted
  1103. data due to bad handling of the address hazard when the line gets
  1104. replaced from one of the CPUs at the same time as another CPU is
  1105. accessing it. This workaround sets specific bits in the diagnostic
  1106. register of the Cortex-A9 which reduces the linefill issuing
  1107. capabilities of the processor.
  1108. config PL310_ERRATA_588369
  1109. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1110. depends on CACHE_L2X0
  1111. help
  1112. The PL310 L2 cache controller implements three types of Clean &
  1113. Invalidate maintenance operations: by Physical Address
  1114. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1115. They are architecturally defined to behave as the execution of a
  1116. clean operation followed immediately by an invalidate operation,
  1117. both performing to the same memory location. This functionality
  1118. is not correctly implemented in PL310 as clean lines are not
  1119. invalidated as a result of these operations.
  1120. config ARM_ERRATA_720789
  1121. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1122. depends on CPU_V7
  1123. help
  1124. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1125. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1126. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1127. As a consequence of this erratum, some TLB entries which should be
  1128. invalidated are not, resulting in an incoherency in the system page
  1129. tables. The workaround changes the TLB flushing routines to invalidate
  1130. entries regardless of the ASID.
  1131. config PL310_ERRATA_727915
  1132. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1133. depends on CACHE_L2X0
  1134. help
  1135. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1136. operation (offset 0x7FC). This operation runs in background so that
  1137. PL310 can handle normal accesses while it is in progress. Under very
  1138. rare circumstances, due to this erratum, write data can be lost when
  1139. PL310 treats a cacheable write transaction during a Clean &
  1140. Invalidate by Way operation.
  1141. config ARM_ERRATA_743622
  1142. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1143. depends on CPU_V7
  1144. depends on !ARCH_MULTIPLATFORM
  1145. help
  1146. This option enables the workaround for the 743622 Cortex-A9
  1147. (r2p*) erratum. Under very rare conditions, a faulty
  1148. optimisation in the Cortex-A9 Store Buffer may lead to data
  1149. corruption. This workaround sets a specific bit in the diagnostic
  1150. register of the Cortex-A9 which disables the Store Buffer
  1151. optimisation, preventing the defect from occurring. This has no
  1152. visible impact on the overall performance or power consumption of the
  1153. processor.
  1154. config ARM_ERRATA_751472
  1155. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1156. depends on CPU_V7
  1157. depends on !ARCH_MULTIPLATFORM
  1158. help
  1159. This option enables the workaround for the 751472 Cortex-A9 (prior
  1160. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1161. completion of a following broadcasted operation if the second
  1162. operation is received by a CPU before the ICIALLUIS has completed,
  1163. potentially leading to corrupted entries in the cache or TLB.
  1164. config PL310_ERRATA_753970
  1165. bool "PL310 errata: cache sync operation may be faulty"
  1166. depends on CACHE_PL310
  1167. help
  1168. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1169. Under some condition the effect of cache sync operation on
  1170. the store buffer still remains when the operation completes.
  1171. This means that the store buffer is always asked to drain and
  1172. this prevents it from merging any further writes. The workaround
  1173. is to replace the normal offset of cache sync operation (0x730)
  1174. by another offset targeting an unmapped PL310 register 0x740.
  1175. This has the same effect as the cache sync operation: store buffer
  1176. drain and waiting for all buffers empty.
  1177. config ARM_ERRATA_754322
  1178. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1179. depends on CPU_V7
  1180. help
  1181. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1182. r3p*) erratum. A speculative memory access may cause a page table walk
  1183. which starts prior to an ASID switch but completes afterwards. This
  1184. can populate the micro-TLB with a stale entry which may be hit with
  1185. the new ASID. This workaround places two dsb instructions in the mm
  1186. switching code so that no page table walks can cross the ASID switch.
  1187. config ARM_ERRATA_754327
  1188. bool "ARM errata: no automatic Store Buffer drain"
  1189. depends on CPU_V7 && SMP
  1190. help
  1191. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1192. r2p0) erratum. The Store Buffer does not have any automatic draining
  1193. mechanism and therefore a livelock may occur if an external agent
  1194. continuously polls a memory location waiting to observe an update.
  1195. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1196. written polling loops from denying visibility of updates to memory.
  1197. config ARM_ERRATA_364296
  1198. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1199. depends on CPU_V6 && !SMP
  1200. help
  1201. This options enables the workaround for the 364296 ARM1136
  1202. r0p2 erratum (possible cache data corruption with
  1203. hit-under-miss enabled). It sets the undocumented bit 31 in
  1204. the auxiliary control register and the FI bit in the control
  1205. register, thus disabling hit-under-miss without putting the
  1206. processor into full low interrupt latency mode. ARM11MPCore
  1207. is not affected.
  1208. config ARM_ERRATA_764369
  1209. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1210. depends on CPU_V7 && SMP
  1211. help
  1212. This option enables the workaround for erratum 764369
  1213. affecting Cortex-A9 MPCore with two or more processors (all
  1214. current revisions). Under certain timing circumstances, a data
  1215. cache line maintenance operation by MVA targeting an Inner
  1216. Shareable memory region may fail to proceed up to either the
  1217. Point of Coherency or to the Point of Unification of the
  1218. system. This workaround adds a DSB instruction before the
  1219. relevant cache maintenance functions and sets a specific bit
  1220. in the diagnostic control register of the SCU.
  1221. config PL310_ERRATA_769419
  1222. bool "PL310 errata: no automatic Store Buffer drain"
  1223. depends on CACHE_L2X0
  1224. help
  1225. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1226. not automatically drain. This can cause normal, non-cacheable
  1227. writes to be retained when the memory system is idle, leading
  1228. to suboptimal I/O performance for drivers using coherent DMA.
  1229. This option adds a write barrier to the cpu_idle loop so that,
  1230. on systems with an outer cache, the store buffer is drained
  1231. explicitly.
  1232. config ARM_ERRATA_775420
  1233. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1234. depends on CPU_V7
  1235. help
  1236. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1237. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1238. operation aborts with MMU exception, it might cause the processor
  1239. to deadlock. This workaround puts DSB before executing ISB if
  1240. an abort may occur on cache maintenance.
  1241. endmenu
  1242. source "arch/arm/common/Kconfig"
  1243. menu "Bus support"
  1244. config ARM_AMBA
  1245. bool
  1246. config ISA
  1247. bool
  1248. help
  1249. Find out whether you have ISA slots on your motherboard. ISA is the
  1250. name of a bus system, i.e. the way the CPU talks to the other stuff
  1251. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1252. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1253. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1254. # Select ISA DMA controller support
  1255. config ISA_DMA
  1256. bool
  1257. select ISA_DMA_API
  1258. # Select ISA DMA interface
  1259. config ISA_DMA_API
  1260. bool
  1261. config PCI
  1262. bool "PCI support" if MIGHT_HAVE_PCI
  1263. help
  1264. Find out whether you have a PCI motherboard. PCI is the name of a
  1265. bus system, i.e. the way the CPU talks to the other stuff inside
  1266. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1267. VESA. If you have PCI, say Y, otherwise N.
  1268. config PCI_DOMAINS
  1269. bool
  1270. depends on PCI
  1271. config PCI_NANOENGINE
  1272. bool "BSE nanoEngine PCI support"
  1273. depends on SA1100_NANOENGINE
  1274. help
  1275. Enable PCI on the BSE nanoEngine board.
  1276. config PCI_SYSCALL
  1277. def_bool PCI
  1278. # Select the host bridge type
  1279. config PCI_HOST_VIA82C505
  1280. bool
  1281. depends on PCI && ARCH_SHARK
  1282. default y
  1283. config PCI_HOST_ITE8152
  1284. bool
  1285. depends on PCI && MACH_ARMCORE
  1286. default y
  1287. select DMABOUNCE
  1288. source "drivers/pci/Kconfig"
  1289. source "drivers/pcmcia/Kconfig"
  1290. endmenu
  1291. menu "Kernel Features"
  1292. config HAVE_SMP
  1293. bool
  1294. help
  1295. This option should be selected by machines which have an SMP-
  1296. capable CPU.
  1297. The only effect of this option is to make the SMP-related
  1298. options available to the user for configuration.
  1299. config SMP
  1300. bool "Symmetric Multi-Processing"
  1301. depends on CPU_V6K || CPU_V7
  1302. depends on GENERIC_CLOCKEVENTS
  1303. depends on HAVE_SMP
  1304. depends on MMU
  1305. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1306. select USE_GENERIC_SMP_HELPERS
  1307. help
  1308. This enables support for systems with more than one CPU. If you have
  1309. a system with only one CPU, like most personal computers, say N. If
  1310. you have a system with more than one CPU, say Y.
  1311. If you say N here, the kernel will run on single and multiprocessor
  1312. machines, but will use only one CPU of a multiprocessor machine. If
  1313. you say Y here, the kernel will run on many, but not all, single
  1314. processor machines. On a single processor machine, the kernel will
  1315. run faster if you say N here.
  1316. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1317. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1318. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1319. If you don't know what to do here, say N.
  1320. config SMP_ON_UP
  1321. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1322. depends on SMP && !XIP_KERNEL
  1323. default y
  1324. help
  1325. SMP kernels contain instructions which fail on non-SMP processors.
  1326. Enabling this option allows the kernel to modify itself to make
  1327. these instructions safe. Disabling it allows about 1K of space
  1328. savings.
  1329. If you don't know what to do here, say Y.
  1330. config ARM_CPU_TOPOLOGY
  1331. bool "Support cpu topology definition"
  1332. depends on SMP && CPU_V7
  1333. default y
  1334. help
  1335. Support ARM cpu topology definition. The MPIDR register defines
  1336. affinity between processors which is then used to describe the cpu
  1337. topology of an ARM System.
  1338. config SCHED_MC
  1339. bool "Multi-core scheduler support"
  1340. depends on ARM_CPU_TOPOLOGY
  1341. help
  1342. Multi-core scheduler support improves the CPU scheduler's decision
  1343. making when dealing with multi-core CPU chips at a cost of slightly
  1344. increased overhead in some places. If unsure say N here.
  1345. config SCHED_SMT
  1346. bool "SMT scheduler support"
  1347. depends on ARM_CPU_TOPOLOGY
  1348. help
  1349. Improves the CPU scheduler's decision making when dealing with
  1350. MultiThreading at a cost of slightly increased overhead in some
  1351. places. If unsure say N here.
  1352. config HAVE_ARM_SCU
  1353. bool
  1354. help
  1355. This option enables support for the ARM system coherency unit
  1356. config HAVE_ARM_ARCH_TIMER
  1357. bool "Architected timer support"
  1358. depends on CPU_V7
  1359. select ARM_ARCH_TIMER
  1360. help
  1361. This option enables support for the ARM architected timer
  1362. config HAVE_ARM_TWD
  1363. bool
  1364. depends on SMP
  1365. help
  1366. This options enables support for the ARM timer and watchdog unit
  1367. choice
  1368. prompt "Memory split"
  1369. default VMSPLIT_3G
  1370. help
  1371. Select the desired split between kernel and user memory.
  1372. If you are not absolutely sure what you are doing, leave this
  1373. option alone!
  1374. config VMSPLIT_3G
  1375. bool "3G/1G user/kernel split"
  1376. config VMSPLIT_2G
  1377. bool "2G/2G user/kernel split"
  1378. config VMSPLIT_1G
  1379. bool "1G/3G user/kernel split"
  1380. endchoice
  1381. config PAGE_OFFSET
  1382. hex
  1383. default 0x40000000 if VMSPLIT_1G
  1384. default 0x80000000 if VMSPLIT_2G
  1385. default 0xC0000000
  1386. config NR_CPUS
  1387. int "Maximum number of CPUs (2-32)"
  1388. range 2 32
  1389. depends on SMP
  1390. default "4"
  1391. config HOTPLUG_CPU
  1392. bool "Support for hot-pluggable CPUs"
  1393. depends on SMP && HOTPLUG
  1394. help
  1395. Say Y here to experiment with turning CPUs off and on. CPUs
  1396. can be controlled through /sys/devices/system/cpu.
  1397. config ARM_PSCI
  1398. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1399. depends on CPU_V7
  1400. help
  1401. Say Y here if you want Linux to communicate with system firmware
  1402. implementing the PSCI specification for CPU-centric power
  1403. management operations described in ARM document number ARM DEN
  1404. 0022A ("Power State Coordination Interface System Software on
  1405. ARM processors").
  1406. config LOCAL_TIMERS
  1407. bool "Use local timer interrupts"
  1408. depends on SMP
  1409. default y
  1410. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1411. help
  1412. Enable support for local timers on SMP platforms, rather then the
  1413. legacy IPI broadcast method. Local timers allows the system
  1414. accounting to be spread across the timer interval, preventing a
  1415. "thundering herd" at every timer tick.
  1416. # The GPIO number here must be sorted by descending number. In case of
  1417. # a multiplatform kernel, we just want the highest value required by the
  1418. # selected platforms.
  1419. config ARCH_NR_GPIO
  1420. int
  1421. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1422. default 512 if SOC_OMAP5
  1423. default 355 if ARCH_U8500
  1424. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1425. default 264 if MACH_H4700
  1426. default 0
  1427. help
  1428. Maximum number of GPIOs in the system.
  1429. If unsure, leave the default value.
  1430. source kernel/Kconfig.preempt
  1431. config HZ
  1432. int
  1433. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1434. ARCH_S5PV210 || ARCH_EXYNOS4
  1435. default AT91_TIMER_HZ if ARCH_AT91
  1436. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1437. default 100
  1438. config SCHED_HRTICK
  1439. def_bool HIGH_RES_TIMERS
  1440. config THUMB2_KERNEL
  1441. bool "Compile the kernel in Thumb-2 mode"
  1442. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1443. select AEABI
  1444. select ARM_ASM_UNIFIED
  1445. select ARM_UNWIND
  1446. help
  1447. By enabling this option, the kernel will be compiled in
  1448. Thumb-2 mode. A compiler/assembler that understand the unified
  1449. ARM-Thumb syntax is needed.
  1450. If unsure, say N.
  1451. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1452. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1453. depends on THUMB2_KERNEL && MODULES
  1454. default y
  1455. help
  1456. Various binutils versions can resolve Thumb-2 branches to
  1457. locally-defined, preemptible global symbols as short-range "b.n"
  1458. branch instructions.
  1459. This is a problem, because there's no guarantee the final
  1460. destination of the symbol, or any candidate locations for a
  1461. trampoline, are within range of the branch. For this reason, the
  1462. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1463. relocation in modules at all, and it makes little sense to add
  1464. support.
  1465. The symptom is that the kernel fails with an "unsupported
  1466. relocation" error when loading some modules.
  1467. Until fixed tools are available, passing
  1468. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1469. code which hits this problem, at the cost of a bit of extra runtime
  1470. stack usage in some cases.
  1471. The problem is described in more detail at:
  1472. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1473. Only Thumb-2 kernels are affected.
  1474. Unless you are sure your tools don't have this problem, say Y.
  1475. config ARM_ASM_UNIFIED
  1476. bool
  1477. config AEABI
  1478. bool "Use the ARM EABI to compile the kernel"
  1479. help
  1480. This option allows for the kernel to be compiled using the latest
  1481. ARM ABI (aka EABI). This is only useful if you are using a user
  1482. space environment that is also compiled with EABI.
  1483. Since there are major incompatibilities between the legacy ABI and
  1484. EABI, especially with regard to structure member alignment, this
  1485. option also changes the kernel syscall calling convention to
  1486. disambiguate both ABIs and allow for backward compatibility support
  1487. (selected with CONFIG_OABI_COMPAT).
  1488. To use this you need GCC version 4.0.0 or later.
  1489. config OABI_COMPAT
  1490. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1491. depends on AEABI && !THUMB2_KERNEL
  1492. default y
  1493. help
  1494. This option preserves the old syscall interface along with the
  1495. new (ARM EABI) one. It also provides a compatibility layer to
  1496. intercept syscalls that have structure arguments which layout
  1497. in memory differs between the legacy ABI and the new ARM EABI
  1498. (only for non "thumb" binaries). This option adds a tiny
  1499. overhead to all syscalls and produces a slightly larger kernel.
  1500. If you know you'll be using only pure EABI user space then you
  1501. can say N here. If this option is not selected and you attempt
  1502. to execute a legacy ABI binary then the result will be
  1503. UNPREDICTABLE (in fact it can be predicted that it won't work
  1504. at all). If in doubt say Y.
  1505. config ARCH_HAS_HOLES_MEMORYMODEL
  1506. bool
  1507. config ARCH_SPARSEMEM_ENABLE
  1508. bool
  1509. config ARCH_SPARSEMEM_DEFAULT
  1510. def_bool ARCH_SPARSEMEM_ENABLE
  1511. config ARCH_SELECT_MEMORY_MODEL
  1512. def_bool ARCH_SPARSEMEM_ENABLE
  1513. config HAVE_ARCH_PFN_VALID
  1514. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1515. config HIGHMEM
  1516. bool "High Memory Support"
  1517. depends on MMU
  1518. help
  1519. The address space of ARM processors is only 4 Gigabytes large
  1520. and it has to accommodate user address space, kernel address
  1521. space as well as some memory mapped IO. That means that, if you
  1522. have a large amount of physical memory and/or IO, not all of the
  1523. memory can be "permanently mapped" by the kernel. The physical
  1524. memory that is not permanently mapped is called "high memory".
  1525. Depending on the selected kernel/user memory split, minimum
  1526. vmalloc space and actual amount of RAM, you may not need this
  1527. option which should result in a slightly faster kernel.
  1528. If unsure, say n.
  1529. config HIGHPTE
  1530. bool "Allocate 2nd-level pagetables from highmem"
  1531. depends on HIGHMEM
  1532. config HW_PERF_EVENTS
  1533. bool "Enable hardware performance counter support for perf events"
  1534. depends on PERF_EVENTS
  1535. default y
  1536. help
  1537. Enable hardware performance counter support for perf events. If
  1538. disabled, perf events will use software events only.
  1539. source "mm/Kconfig"
  1540. config FORCE_MAX_ZONEORDER
  1541. int "Maximum zone order" if ARCH_SHMOBILE
  1542. range 11 64 if ARCH_SHMOBILE
  1543. default "12" if SOC_AM33XX
  1544. default "9" if SA1111
  1545. default "11"
  1546. help
  1547. The kernel memory allocator divides physically contiguous memory
  1548. blocks into "zones", where each zone is a power of two number of
  1549. pages. This option selects the largest power of two that the kernel
  1550. keeps in the memory allocator. If you need to allocate very large
  1551. blocks of physically contiguous memory, then you may need to
  1552. increase this value.
  1553. This config option is actually maximum order plus one. For example,
  1554. a value of 11 means that the largest free memory block is 2^10 pages.
  1555. config ALIGNMENT_TRAP
  1556. bool
  1557. depends on CPU_CP15_MMU
  1558. default y if !ARCH_EBSA110
  1559. select HAVE_PROC_CPU if PROC_FS
  1560. help
  1561. ARM processors cannot fetch/store information which is not
  1562. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1563. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1564. fetch/store instructions will be emulated in software if you say
  1565. here, which has a severe performance impact. This is necessary for
  1566. correct operation of some network protocols. With an IP-only
  1567. configuration it is safe to say N, otherwise say Y.
  1568. config UACCESS_WITH_MEMCPY
  1569. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1570. depends on MMU
  1571. default y if CPU_FEROCEON
  1572. help
  1573. Implement faster copy_to_user and clear_user methods for CPU
  1574. cores where a 8-word STM instruction give significantly higher
  1575. memory write throughput than a sequence of individual 32bit stores.
  1576. A possible side effect is a slight increase in scheduling latency
  1577. between threads sharing the same address space if they invoke
  1578. such copy operations with large buffers.
  1579. However, if the CPU data cache is using a write-allocate mode,
  1580. this option is unlikely to provide any performance gain.
  1581. config SECCOMP
  1582. bool
  1583. prompt "Enable seccomp to safely compute untrusted bytecode"
  1584. ---help---
  1585. This kernel feature is useful for number crunching applications
  1586. that may need to compute untrusted bytecode during their
  1587. execution. By using pipes or other transports made available to
  1588. the process as file descriptors supporting the read/write
  1589. syscalls, it's possible to isolate those applications in
  1590. their own address space using seccomp. Once seccomp is
  1591. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1592. and the task is only allowed to execute a few safe syscalls
  1593. defined by each seccomp mode.
  1594. config CC_STACKPROTECTOR
  1595. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1596. help
  1597. This option turns on the -fstack-protector GCC feature. This
  1598. feature puts, at the beginning of functions, a canary value on
  1599. the stack just before the return address, and validates
  1600. the value just before actually returning. Stack based buffer
  1601. overflows (that need to overwrite this return address) now also
  1602. overwrite the canary, which gets detected and the attack is then
  1603. neutralized via a kernel panic.
  1604. This feature requires gcc version 4.2 or above.
  1605. config XEN_DOM0
  1606. def_bool y
  1607. depends on XEN
  1608. config XEN
  1609. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1610. depends on ARM && AEABI && OF
  1611. depends on CPU_V7 && !CPU_V6
  1612. depends on !GENERIC_ATOMIC64
  1613. help
  1614. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1615. endmenu
  1616. menu "Boot options"
  1617. config USE_OF
  1618. bool "Flattened Device Tree support"
  1619. select IRQ_DOMAIN
  1620. select OF
  1621. select OF_EARLY_FLATTREE
  1622. help
  1623. Include support for flattened device tree machine descriptions.
  1624. config ATAGS
  1625. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1626. default y
  1627. help
  1628. This is the traditional way of passing data to the kernel at boot
  1629. time. If you are solely relying on the flattened device tree (or
  1630. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1631. to remove ATAGS support from your kernel binary. If unsure,
  1632. leave this to y.
  1633. config DEPRECATED_PARAM_STRUCT
  1634. bool "Provide old way to pass kernel parameters"
  1635. depends on ATAGS
  1636. help
  1637. This was deprecated in 2001 and announced to live on for 5 years.
  1638. Some old boot loaders still use this way.
  1639. # Compressed boot loader in ROM. Yes, we really want to ask about
  1640. # TEXT and BSS so we preserve their values in the config files.
  1641. config ZBOOT_ROM_TEXT
  1642. hex "Compressed ROM boot loader base address"
  1643. default "0"
  1644. help
  1645. The physical address at which the ROM-able zImage is to be
  1646. placed in the target. Platforms which normally make use of
  1647. ROM-able zImage formats normally set this to a suitable
  1648. value in their defconfig file.
  1649. If ZBOOT_ROM is not enabled, this has no effect.
  1650. config ZBOOT_ROM_BSS
  1651. hex "Compressed ROM boot loader BSS address"
  1652. default "0"
  1653. help
  1654. The base address of an area of read/write memory in the target
  1655. for the ROM-able zImage which must be available while the
  1656. decompressor is running. It must be large enough to hold the
  1657. entire decompressed kernel plus an additional 128 KiB.
  1658. Platforms which normally make use of ROM-able zImage formats
  1659. normally set this to a suitable value in their defconfig file.
  1660. If ZBOOT_ROM is not enabled, this has no effect.
  1661. config ZBOOT_ROM
  1662. bool "Compressed boot loader in ROM/flash"
  1663. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1664. help
  1665. Say Y here if you intend to execute your compressed kernel image
  1666. (zImage) directly from ROM or flash. If unsure, say N.
  1667. choice
  1668. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1669. depends on ZBOOT_ROM && ARCH_SH7372
  1670. default ZBOOT_ROM_NONE
  1671. help
  1672. Include experimental SD/MMC loading code in the ROM-able zImage.
  1673. With this enabled it is possible to write the ROM-able zImage
  1674. kernel image to an MMC or SD card and boot the kernel straight
  1675. from the reset vector. At reset the processor Mask ROM will load
  1676. the first part of the ROM-able zImage which in turn loads the
  1677. rest the kernel image to RAM.
  1678. config ZBOOT_ROM_NONE
  1679. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1680. help
  1681. Do not load image from SD or MMC
  1682. config ZBOOT_ROM_MMCIF
  1683. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1684. help
  1685. Load image from MMCIF hardware block.
  1686. config ZBOOT_ROM_SH_MOBILE_SDHI
  1687. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1688. help
  1689. Load image from SDHI hardware block
  1690. endchoice
  1691. config ARM_APPENDED_DTB
  1692. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1693. depends on OF && !ZBOOT_ROM
  1694. help
  1695. With this option, the boot code will look for a device tree binary
  1696. (DTB) appended to zImage
  1697. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1698. This is meant as a backward compatibility convenience for those
  1699. systems with a bootloader that can't be upgraded to accommodate
  1700. the documented boot protocol using a device tree.
  1701. Beware that there is very little in terms of protection against
  1702. this option being confused by leftover garbage in memory that might
  1703. look like a DTB header after a reboot if no actual DTB is appended
  1704. to zImage. Do not leave this option active in a production kernel
  1705. if you don't intend to always append a DTB. Proper passing of the
  1706. location into r2 of a bootloader provided DTB is always preferable
  1707. to this option.
  1708. config ARM_ATAG_DTB_COMPAT
  1709. bool "Supplement the appended DTB with traditional ATAG information"
  1710. depends on ARM_APPENDED_DTB
  1711. help
  1712. Some old bootloaders can't be updated to a DTB capable one, yet
  1713. they provide ATAGs with memory configuration, the ramdisk address,
  1714. the kernel cmdline string, etc. Such information is dynamically
  1715. provided by the bootloader and can't always be stored in a static
  1716. DTB. To allow a device tree enabled kernel to be used with such
  1717. bootloaders, this option allows zImage to extract the information
  1718. from the ATAG list and store it at run time into the appended DTB.
  1719. choice
  1720. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1721. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1722. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1723. bool "Use bootloader kernel arguments if available"
  1724. help
  1725. Uses the command-line options passed by the boot loader instead of
  1726. the device tree bootargs property. If the boot loader doesn't provide
  1727. any, the device tree bootargs property will be used.
  1728. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1729. bool "Extend with bootloader kernel arguments"
  1730. help
  1731. The command-line arguments provided by the boot loader will be
  1732. appended to the the device tree bootargs property.
  1733. endchoice
  1734. config CMDLINE
  1735. string "Default kernel command string"
  1736. default ""
  1737. help
  1738. On some architectures (EBSA110 and CATS), there is currently no way
  1739. for the boot loader to pass arguments to the kernel. For these
  1740. architectures, you should supply some command-line options at build
  1741. time by entering them here. As a minimum, you should specify the
  1742. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1743. choice
  1744. prompt "Kernel command line type" if CMDLINE != ""
  1745. default CMDLINE_FROM_BOOTLOADER
  1746. depends on ATAGS
  1747. config CMDLINE_FROM_BOOTLOADER
  1748. bool "Use bootloader kernel arguments if available"
  1749. help
  1750. Uses the command-line options passed by the boot loader. If
  1751. the boot loader doesn't provide any, the default kernel command
  1752. string provided in CMDLINE will be used.
  1753. config CMDLINE_EXTEND
  1754. bool "Extend bootloader kernel arguments"
  1755. help
  1756. The command-line arguments provided by the boot loader will be
  1757. appended to the default kernel command string.
  1758. config CMDLINE_FORCE
  1759. bool "Always use the default kernel command string"
  1760. help
  1761. Always use the default kernel command string, even if the boot
  1762. loader passes other arguments to the kernel.
  1763. This is useful if you cannot or don't want to change the
  1764. command-line options your boot loader passes to the kernel.
  1765. endchoice
  1766. config XIP_KERNEL
  1767. bool "Kernel Execute-In-Place from ROM"
  1768. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1769. help
  1770. Execute-In-Place allows the kernel to run from non-volatile storage
  1771. directly addressable by the CPU, such as NOR flash. This saves RAM
  1772. space since the text section of the kernel is not loaded from flash
  1773. to RAM. Read-write sections, such as the data section and stack,
  1774. are still copied to RAM. The XIP kernel is not compressed since
  1775. it has to run directly from flash, so it will take more space to
  1776. store it. The flash address used to link the kernel object files,
  1777. and for storing it, is configuration dependent. Therefore, if you
  1778. say Y here, you must know the proper physical address where to
  1779. store the kernel image depending on your own flash memory usage.
  1780. Also note that the make target becomes "make xipImage" rather than
  1781. "make zImage" or "make Image". The final kernel binary to put in
  1782. ROM memory will be arch/arm/boot/xipImage.
  1783. If unsure, say N.
  1784. config XIP_PHYS_ADDR
  1785. hex "XIP Kernel Physical Location"
  1786. depends on XIP_KERNEL
  1787. default "0x00080000"
  1788. help
  1789. This is the physical address in your flash memory the kernel will
  1790. be linked for and stored to. This address is dependent on your
  1791. own flash usage.
  1792. config KEXEC
  1793. bool "Kexec system call (EXPERIMENTAL)"
  1794. depends on (!SMP || HOTPLUG_CPU)
  1795. help
  1796. kexec is a system call that implements the ability to shutdown your
  1797. current kernel, and to start another kernel. It is like a reboot
  1798. but it is independent of the system firmware. And like a reboot
  1799. you can start any kernel with it, not just Linux.
  1800. It is an ongoing process to be certain the hardware in a machine
  1801. is properly shutdown, so do not be surprised if this code does not
  1802. initially work for you. It may help to enable device hotplugging
  1803. support.
  1804. config ATAGS_PROC
  1805. bool "Export atags in procfs"
  1806. depends on ATAGS && KEXEC
  1807. default y
  1808. help
  1809. Should the atags used to boot the kernel be exported in an "atags"
  1810. file in procfs. Useful with kexec.
  1811. config CRASH_DUMP
  1812. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1813. help
  1814. Generate crash dump after being started by kexec. This should
  1815. be normally only set in special crash dump kernels which are
  1816. loaded in the main kernel with kexec-tools into a specially
  1817. reserved region and then later executed after a crash by
  1818. kdump/kexec. The crash dump kernel must be compiled to a
  1819. memory address not used by the main kernel
  1820. For more details see Documentation/kdump/kdump.txt
  1821. config AUTO_ZRELADDR
  1822. bool "Auto calculation of the decompressed kernel image address"
  1823. depends on !ZBOOT_ROM && !ARCH_U300
  1824. help
  1825. ZRELADDR is the physical address where the decompressed kernel
  1826. image will be placed. If AUTO_ZRELADDR is selected, the address
  1827. will be determined at run-time by masking the current IP with
  1828. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1829. from start of memory.
  1830. endmenu
  1831. menu "CPU Power Management"
  1832. if ARCH_HAS_CPUFREQ
  1833. source "drivers/cpufreq/Kconfig"
  1834. config CPU_FREQ_IMX
  1835. tristate "CPUfreq driver for i.MX CPUs"
  1836. depends on ARCH_MXC && CPU_FREQ
  1837. select CPU_FREQ_TABLE
  1838. help
  1839. This enables the CPUfreq driver for i.MX CPUs.
  1840. config CPU_FREQ_SA1100
  1841. bool
  1842. config CPU_FREQ_SA1110
  1843. bool
  1844. config CPU_FREQ_INTEGRATOR
  1845. tristate "CPUfreq driver for ARM Integrator CPUs"
  1846. depends on ARCH_INTEGRATOR && CPU_FREQ
  1847. default y
  1848. help
  1849. This enables the CPUfreq driver for ARM Integrator CPUs.
  1850. For details, take a look at <file:Documentation/cpu-freq>.
  1851. If in doubt, say Y.
  1852. config CPU_FREQ_PXA
  1853. bool
  1854. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1855. default y
  1856. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1857. select CPU_FREQ_TABLE
  1858. config CPU_FREQ_S3C
  1859. bool
  1860. help
  1861. Internal configuration node for common cpufreq on Samsung SoC
  1862. config CPU_FREQ_S3C24XX
  1863. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1864. depends on ARCH_S3C24XX && CPU_FREQ
  1865. select CPU_FREQ_S3C
  1866. help
  1867. This enables the CPUfreq driver for the Samsung S3C24XX family
  1868. of CPUs.
  1869. For details, take a look at <file:Documentation/cpu-freq>.
  1870. If in doubt, say N.
  1871. config CPU_FREQ_S3C24XX_PLL
  1872. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1873. depends on CPU_FREQ_S3C24XX
  1874. help
  1875. Compile in support for changing the PLL frequency from the
  1876. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1877. after a frequency change, so by default it is not enabled.
  1878. This also means that the PLL tables for the selected CPU(s) will
  1879. be built which may increase the size of the kernel image.
  1880. config CPU_FREQ_S3C24XX_DEBUG
  1881. bool "Debug CPUfreq Samsung driver core"
  1882. depends on CPU_FREQ_S3C24XX
  1883. help
  1884. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1885. config CPU_FREQ_S3C24XX_IODEBUG
  1886. bool "Debug CPUfreq Samsung driver IO timing"
  1887. depends on CPU_FREQ_S3C24XX
  1888. help
  1889. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1890. config CPU_FREQ_S3C24XX_DEBUGFS
  1891. bool "Export debugfs for CPUFreq"
  1892. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1893. help
  1894. Export status information via debugfs.
  1895. endif
  1896. source "drivers/cpuidle/Kconfig"
  1897. endmenu
  1898. menu "Floating point emulation"
  1899. comment "At least one emulation must be selected"
  1900. config FPE_NWFPE
  1901. bool "NWFPE math emulation"
  1902. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1903. ---help---
  1904. Say Y to include the NWFPE floating point emulator in the kernel.
  1905. This is necessary to run most binaries. Linux does not currently
  1906. support floating point hardware so you need to say Y here even if
  1907. your machine has an FPA or floating point co-processor podule.
  1908. You may say N here if you are going to load the Acorn FPEmulator
  1909. early in the bootup.
  1910. config FPE_NWFPE_XP
  1911. bool "Support extended precision"
  1912. depends on FPE_NWFPE
  1913. help
  1914. Say Y to include 80-bit support in the kernel floating-point
  1915. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1916. Note that gcc does not generate 80-bit operations by default,
  1917. so in most cases this option only enlarges the size of the
  1918. floating point emulator without any good reason.
  1919. You almost surely want to say N here.
  1920. config FPE_FASTFPE
  1921. bool "FastFPE math emulation (EXPERIMENTAL)"
  1922. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1923. ---help---
  1924. Say Y here to include the FAST floating point emulator in the kernel.
  1925. This is an experimental much faster emulator which now also has full
  1926. precision for the mantissa. It does not support any exceptions.
  1927. It is very simple, and approximately 3-6 times faster than NWFPE.
  1928. It should be sufficient for most programs. It may be not suitable
  1929. for scientific calculations, but you have to check this for yourself.
  1930. If you do not feel you need a faster FP emulation you should better
  1931. choose NWFPE.
  1932. config VFP
  1933. bool "VFP-format floating point maths"
  1934. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1935. help
  1936. Say Y to include VFP support code in the kernel. This is needed
  1937. if your hardware includes a VFP unit.
  1938. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1939. release notes and additional status information.
  1940. Say N if your target does not have VFP hardware.
  1941. config VFPv3
  1942. bool
  1943. depends on VFP
  1944. default y if CPU_V7
  1945. config NEON
  1946. bool "Advanced SIMD (NEON) Extension support"
  1947. depends on VFPv3 && CPU_V7
  1948. help
  1949. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1950. Extension.
  1951. endmenu
  1952. menu "Userspace binary formats"
  1953. source "fs/Kconfig.binfmt"
  1954. config ARTHUR
  1955. tristate "RISC OS personality"
  1956. depends on !AEABI
  1957. help
  1958. Say Y here to include the kernel code necessary if you want to run
  1959. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1960. experimental; if this sounds frightening, say N and sleep in peace.
  1961. You can also say M here to compile this support as a module (which
  1962. will be called arthur).
  1963. endmenu
  1964. menu "Power management options"
  1965. source "kernel/power/Kconfig"
  1966. config ARCH_SUSPEND_POSSIBLE
  1967. depends on !ARCH_S5PC100
  1968. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1969. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1970. def_bool y
  1971. config ARM_CPU_SUSPEND
  1972. def_bool PM_SLEEP
  1973. endmenu
  1974. source "net/Kconfig"
  1975. source "drivers/Kconfig"
  1976. source "fs/Kconfig"
  1977. source "arch/arm/Kconfig.debug"
  1978. source "security/Kconfig"
  1979. source "crypto/Kconfig"
  1980. source "lib/Kconfig"
  1981. source "arch/arm/kvm/Kconfig"