Kconfig 66 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_WANT_IPC_PARSE_VERSION
  8. select BUILDTIME_EXTABLE_SORT if MMU
  9. select CPU_PM if (SUSPEND || CPU_IDLE)
  10. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  11. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  12. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  13. select GENERIC_IRQ_PROBE
  14. select GENERIC_IRQ_SHOW
  15. select GENERIC_PCI_IOMAP
  16. select GENERIC_SMP_IDLE_THREAD
  17. select GENERIC_STRNCPY_FROM_USER
  18. select GENERIC_STRNLEN_USER
  19. select HARDIRQS_SW_RESEND
  20. select HAVE_AOUT
  21. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  22. select HAVE_ARCH_KGDB
  23. select HAVE_ARCH_SECCOMP_FILTER
  24. select HAVE_ARCH_TRACEHOOK
  25. select HAVE_BPF_JIT
  26. select HAVE_C_RECORDMCOUNT
  27. select HAVE_DEBUG_KMEMLEAK
  28. select HAVE_DMA_API_DEBUG
  29. select HAVE_DMA_ATTRS
  30. select HAVE_DMA_CONTIGUOUS if MMU
  31. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  32. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  33. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  34. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  35. select HAVE_GENERIC_DMA_COHERENT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_IDE if PCI || ISA || PCMCIA
  39. select HAVE_IRQ_WORK
  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. help
  60. The ARM series is a line of low-power-consumption RISC chip designs
  61. licensed by ARM Ltd and targeted at embedded applications and
  62. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  63. manufactured, but legacy ARM-based PC hardware remains popular in
  64. Europe. There is an ARM Linux project with a web page at
  65. <http://www.arm.linux.org.uk/>.
  66. config ARM_HAS_SG_CHAIN
  67. bool
  68. config NEED_SG_DMA_LENGTH
  69. bool
  70. config ARM_DMA_USE_IOMMU
  71. bool
  72. select ARM_HAS_SG_CHAIN
  73. select NEED_SG_DMA_LENGTH
  74. config HAVE_PWM
  75. bool
  76. config MIGHT_HAVE_PCI
  77. bool
  78. config SYS_SUPPORTS_APM_EMULATION
  79. bool
  80. config GENERIC_GPIO
  81. bool
  82. config HAVE_TCM
  83. bool
  84. select GENERIC_ALLOCATOR
  85. config HAVE_PROC_CPU
  86. bool
  87. config NO_IOPORT
  88. bool
  89. config EISA
  90. bool
  91. ---help---
  92. The Extended Industry Standard Architecture (EISA) bus was
  93. developed as an open alternative to the IBM MicroChannel bus.
  94. The EISA bus provided some of the features of the IBM MicroChannel
  95. bus while maintaining backward compatibility with cards made for
  96. the older ISA bus. The EISA bus saw limited use between 1988 and
  97. 1995 when it was made obsolete by the PCI bus.
  98. Say Y here if you are building a kernel for an EISA-based machine.
  99. Otherwise, say N.
  100. config SBUS
  101. bool
  102. config STACKTRACE_SUPPORT
  103. bool
  104. default y
  105. config HAVE_LATENCYTOP_SUPPORT
  106. bool
  107. depends on !SMP
  108. default y
  109. config LOCKDEP_SUPPORT
  110. bool
  111. default y
  112. config TRACE_IRQFLAGS_SUPPORT
  113. bool
  114. default y
  115. config RWSEM_GENERIC_SPINLOCK
  116. bool
  117. default y
  118. config RWSEM_XCHGADD_ALGORITHM
  119. bool
  120. config ARCH_HAS_ILOG2_U32
  121. bool
  122. config ARCH_HAS_ILOG2_U64
  123. bool
  124. config ARCH_HAS_CPUFREQ
  125. bool
  126. help
  127. Internal node to signify that the ARCH has CPUFREQ support
  128. and that the relevant menu configurations are displayed for
  129. it.
  130. config GENERIC_HWEIGHT
  131. bool
  132. default y
  133. config GENERIC_CALIBRATE_DELAY
  134. bool
  135. default y
  136. config ARCH_MAY_HAVE_PC_FDC
  137. bool
  138. config ZONE_DMA
  139. bool
  140. config NEED_DMA_MAP_STATE
  141. def_bool y
  142. config ARCH_HAS_DMA_SET_COHERENT_MASK
  143. bool
  144. config GENERIC_ISA_DMA
  145. bool
  146. config FIQ
  147. bool
  148. config NEED_RET_TO_USER
  149. bool
  150. config ARCH_MTD_XIP
  151. bool
  152. config VECTORS_BASE
  153. hex
  154. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  155. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  156. default 0x00000000
  157. help
  158. The base address of exception vectors.
  159. config ARM_PATCH_PHYS_VIRT
  160. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  161. default y
  162. depends on !XIP_KERNEL && MMU
  163. depends on !ARCH_REALVIEW || !SPARSEMEM
  164. help
  165. Patch phys-to-virt and virt-to-phys translation functions at
  166. boot and module load time according to the position of the
  167. kernel in system memory.
  168. This can only be used with non-XIP MMU kernels where the base
  169. of physical memory is at a 16MB boundary.
  170. Only disable this option if you know that you do not require
  171. this feature (eg, building a kernel for a single machine) and
  172. you need to shrink the kernel to the minimal size.
  173. config NEED_MACH_GPIO_H
  174. bool
  175. help
  176. Select this when mach/gpio.h is required to provide special
  177. definitions for this platform. The need for mach/gpio.h should
  178. be avoided when possible.
  179. config NEED_MACH_IO_H
  180. bool
  181. help
  182. Select this when mach/io.h is required to provide special
  183. definitions for this platform. The need for mach/io.h should
  184. be avoided when possible.
  185. config NEED_MACH_MEMORY_H
  186. bool
  187. help
  188. Select this when mach/memory.h is required to provide special
  189. definitions for this platform. The need for mach/memory.h should
  190. be avoided when possible.
  191. config PHYS_OFFSET
  192. hex "Physical address of main memory" if MMU
  193. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  194. default DRAM_BASE if !MMU
  195. help
  196. Please provide the physical address corresponding to the
  197. location of main memory in your system.
  198. config GENERIC_BUG
  199. def_bool y
  200. depends on BUG
  201. source "init/Kconfig"
  202. source "kernel/Kconfig.freezer"
  203. menu "System Type"
  204. config MMU
  205. bool "MMU-based Paged Memory Management Support"
  206. default y
  207. help
  208. Select if you want MMU-based virtualised addressing space
  209. support by paged memory management. If unsure, say 'Y'.
  210. #
  211. # The "ARM system type" choice list is ordered alphabetically by option
  212. # text. Please add new entries in the option alphabetic order.
  213. #
  214. choice
  215. prompt "ARM system type"
  216. default ARCH_MULTIPLATFORM
  217. config ARCH_MULTIPLATFORM
  218. bool "Allow multiple platforms to be selected"
  219. depends on MMU
  220. select ARM_PATCH_PHYS_VIRT
  221. select AUTO_ZRELADDR
  222. select COMMON_CLK
  223. select MULTI_IRQ_HANDLER
  224. select SPARSE_IRQ
  225. select USE_OF
  226. config ARCH_INTEGRATOR
  227. bool "ARM Ltd. Integrator family"
  228. select ARCH_HAS_CPUFREQ
  229. select ARM_AMBA
  230. select COMMON_CLK
  231. select COMMON_CLK_VERSATILE
  232. select GENERIC_CLOCKEVENTS
  233. select HAVE_TCM
  234. select ICST
  235. select MULTI_IRQ_HANDLER
  236. select NEED_MACH_MEMORY_H
  237. select PLAT_VERSATILE
  238. select SPARSE_IRQ
  239. select VERSATILE_FPGA_IRQ
  240. help
  241. Support for ARM's Integrator platform.
  242. config ARCH_REALVIEW
  243. bool "ARM Ltd. RealView family"
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select ARM_AMBA
  246. select ARM_TIMER_SP804
  247. select COMMON_CLK
  248. select COMMON_CLK_VERSATILE
  249. select GENERIC_CLOCKEVENTS
  250. select GPIO_PL061 if GPIOLIB
  251. select ICST
  252. select NEED_MACH_MEMORY_H
  253. select PLAT_VERSATILE
  254. select PLAT_VERSATILE_CLCD
  255. help
  256. This enables support for ARM Ltd RealView boards.
  257. config ARCH_VERSATILE
  258. bool "ARM Ltd. Versatile family"
  259. select ARCH_WANT_OPTIONAL_GPIOLIB
  260. select ARM_AMBA
  261. select ARM_TIMER_SP804
  262. select ARM_VIC
  263. select CLKDEV_LOOKUP
  264. select GENERIC_CLOCKEVENTS
  265. select HAVE_MACH_CLKDEV
  266. select ICST
  267. select PLAT_VERSATILE
  268. select PLAT_VERSATILE_CLCD
  269. select PLAT_VERSATILE_CLOCK
  270. select VERSATILE_FPGA_IRQ
  271. help
  272. This enables support for ARM Ltd Versatile board.
  273. config ARCH_AT91
  274. bool "Atmel AT91"
  275. select ARCH_REQUIRE_GPIOLIB
  276. select CLKDEV_LOOKUP
  277. select HAVE_CLK
  278. select IRQ_DOMAIN
  279. select NEED_MACH_GPIO_H
  280. select NEED_MACH_IO_H if PCCARD
  281. select PINCTRL
  282. select PINCTRL_AT91 if USE_OF
  283. help
  284. This enables support for systems based on Atmel
  285. AT91RM9200 and AT91SAM9* processors.
  286. config ARCH_BCM2835
  287. bool "Broadcom BCM2835 family"
  288. select ARCH_REQUIRE_GPIOLIB
  289. select ARM_AMBA
  290. select ARM_ERRATA_411920
  291. select ARM_TIMER_SP804
  292. select CLKDEV_LOOKUP
  293. select COMMON_CLK
  294. select CPU_V6
  295. select GENERIC_CLOCKEVENTS
  296. select GENERIC_GPIO
  297. select MULTI_IRQ_HANDLER
  298. select PINCTRL
  299. select PINCTRL_BCM2835
  300. select SPARSE_IRQ
  301. select USE_OF
  302. help
  303. This enables support for the Broadcom BCM2835 SoC. This SoC is
  304. use in the Raspberry Pi, and Roku 2 devices.
  305. config ARCH_CNS3XXX
  306. bool "Cavium Networks CNS3XXX family"
  307. select ARM_GIC
  308. select CPU_V6K
  309. select GENERIC_CLOCKEVENTS
  310. select MIGHT_HAVE_CACHE_L2X0
  311. select MIGHT_HAVE_PCI
  312. select PCI_DOMAINS if PCI
  313. help
  314. Support for Cavium Networks CNS3XXX platform.
  315. config ARCH_CLPS711X
  316. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  317. select ARCH_REQUIRE_GPIOLIB
  318. select AUTO_ZRELADDR
  319. select CLKDEV_LOOKUP
  320. select COMMON_CLK
  321. select CPU_ARM720T
  322. select GENERIC_CLOCKEVENTS
  323. select MULTI_IRQ_HANDLER
  324. select NEED_MACH_MEMORY_H
  325. select SPARSE_IRQ
  326. help
  327. Support for Cirrus Logic 711x/721x/731x based boards.
  328. config ARCH_GEMINI
  329. bool "Cortina Systems Gemini"
  330. select ARCH_REQUIRE_GPIOLIB
  331. select ARCH_USES_GETTIMEOFFSET
  332. select CPU_FA526
  333. help
  334. Support for the Cortina Systems Gemini family SoCs
  335. config ARCH_SIRF
  336. bool "CSR SiRF"
  337. select ARCH_REQUIRE_GPIOLIB
  338. select COMMON_CLK
  339. select GENERIC_CLOCKEVENTS
  340. select GENERIC_IRQ_CHIP
  341. select MIGHT_HAVE_CACHE_L2X0
  342. select NO_IOPORT
  343. select PINCTRL
  344. select PINCTRL_SIRF
  345. select USE_OF
  346. help
  347. Support for CSR SiRFprimaII/Marco/Polo platforms
  348. config ARCH_EBSA110
  349. bool "EBSA-110"
  350. select ARCH_USES_GETTIMEOFFSET
  351. select CPU_SA110
  352. select ISA
  353. select NEED_MACH_IO_H
  354. select NEED_MACH_MEMORY_H
  355. select NO_IOPORT
  356. help
  357. This is an evaluation board for the StrongARM processor available
  358. from Digital. It has limited hardware on-board, including an
  359. Ethernet interface, two PCMCIA sockets, two serial ports and a
  360. parallel port.
  361. config ARCH_EP93XX
  362. bool "EP93xx-based"
  363. select ARCH_HAS_HOLES_MEMORYMODEL
  364. select ARCH_REQUIRE_GPIOLIB
  365. select ARCH_USES_GETTIMEOFFSET
  366. select ARM_AMBA
  367. select ARM_VIC
  368. select CLKDEV_LOOKUP
  369. select CPU_ARM920T
  370. select NEED_MACH_MEMORY_H
  371. help
  372. This enables support for the Cirrus EP93xx series of CPUs.
  373. config ARCH_FOOTBRIDGE
  374. bool "FootBridge"
  375. select CPU_SA110
  376. select FOOTBRIDGE
  377. select GENERIC_CLOCKEVENTS
  378. select HAVE_IDE
  379. select NEED_MACH_IO_H if !MMU
  380. select NEED_MACH_MEMORY_H
  381. help
  382. Support for systems based on the DC21285 companion chip
  383. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  384. config ARCH_MXS
  385. bool "Freescale MXS-based"
  386. select ARCH_REQUIRE_GPIOLIB
  387. select CLKDEV_LOOKUP
  388. select CLKSRC_MMIO
  389. select COMMON_CLK
  390. select GENERIC_CLOCKEVENTS
  391. select HAVE_CLK_PREPARE
  392. select MULTI_IRQ_HANDLER
  393. select PINCTRL
  394. select SPARSE_IRQ
  395. select USE_OF
  396. help
  397. Support for Freescale MXS-based family of processors
  398. config ARCH_NETX
  399. bool "Hilscher NetX based"
  400. select ARM_VIC
  401. select CLKSRC_MMIO
  402. select CPU_ARM926T
  403. select GENERIC_CLOCKEVENTS
  404. help
  405. This enables support for systems based on the Hilscher NetX Soc
  406. config ARCH_H720X
  407. bool "Hynix HMS720x-based"
  408. select ARCH_USES_GETTIMEOFFSET
  409. select CPU_ARM720T
  410. select ISA_DMA_API
  411. help
  412. This enables support for systems based on the Hynix HMS720x
  413. config ARCH_IOP13XX
  414. bool "IOP13xx-based"
  415. depends on MMU
  416. select ARCH_SUPPORTS_MSI
  417. select CPU_XSC3
  418. select NEED_MACH_MEMORY_H
  419. select NEED_RET_TO_USER
  420. select PCI
  421. select PLAT_IOP
  422. select VMSPLIT_1G
  423. help
  424. Support for Intel's IOP13XX (XScale) family of processors.
  425. config ARCH_IOP32X
  426. bool "IOP32x-based"
  427. depends on MMU
  428. select ARCH_REQUIRE_GPIOLIB
  429. select CPU_XSCALE
  430. select NEED_MACH_GPIO_H
  431. select NEED_RET_TO_USER
  432. select PCI
  433. select PLAT_IOP
  434. help
  435. Support for Intel's 80219 and IOP32X (XScale) family of
  436. processors.
  437. config ARCH_IOP33X
  438. bool "IOP33x-based"
  439. depends on MMU
  440. select ARCH_REQUIRE_GPIOLIB
  441. select CPU_XSCALE
  442. select NEED_MACH_GPIO_H
  443. select NEED_RET_TO_USER
  444. select PCI
  445. select PLAT_IOP
  446. help
  447. Support for Intel's IOP33X (XScale) family of processors.
  448. config ARCH_IXP4XX
  449. bool "IXP4xx-based"
  450. depends on MMU
  451. select ARCH_HAS_DMA_SET_COHERENT_MASK
  452. select ARCH_REQUIRE_GPIOLIB
  453. select CLKSRC_MMIO
  454. select CPU_XSCALE
  455. select DMABOUNCE if PCI
  456. select GENERIC_CLOCKEVENTS
  457. select MIGHT_HAVE_PCI
  458. select NEED_MACH_IO_H
  459. help
  460. Support for Intel's IXP4XX (XScale) family of processors.
  461. config ARCH_DOVE
  462. bool "Marvell Dove"
  463. select ARCH_REQUIRE_GPIOLIB
  464. select COMMON_CLK_DOVE
  465. select CPU_V7
  466. select GENERIC_CLOCKEVENTS
  467. select MIGHT_HAVE_PCI
  468. select PINCTRL
  469. select PINCTRL_DOVE
  470. select PLAT_ORION_LEGACY
  471. select USB_ARCH_HAS_EHCI
  472. help
  473. Support for the Marvell Dove SoC 88AP510
  474. config ARCH_KIRKWOOD
  475. bool "Marvell Kirkwood"
  476. select ARCH_REQUIRE_GPIOLIB
  477. select CPU_FEROCEON
  478. select GENERIC_CLOCKEVENTS
  479. select PCI
  480. select PCI_QUIRKS
  481. select PINCTRL
  482. select PINCTRL_KIRKWOOD
  483. select PLAT_ORION_LEGACY
  484. help
  485. Support for the following Marvell Kirkwood series SoCs:
  486. 88F6180, 88F6192 and 88F6281.
  487. config ARCH_MV78XX0
  488. bool "Marvell MV78xx0"
  489. select ARCH_REQUIRE_GPIOLIB
  490. select CPU_FEROCEON
  491. select GENERIC_CLOCKEVENTS
  492. select PCI
  493. select PLAT_ORION_LEGACY
  494. help
  495. Support for the following Marvell MV78xx0 series SoCs:
  496. MV781x0, MV782x0.
  497. config ARCH_ORION5X
  498. bool "Marvell Orion"
  499. depends on MMU
  500. select ARCH_REQUIRE_GPIOLIB
  501. select CPU_FEROCEON
  502. select GENERIC_CLOCKEVENTS
  503. select PCI
  504. select PLAT_ORION_LEGACY
  505. help
  506. Support for the following Marvell Orion 5x series SoCs:
  507. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  508. Orion-2 (5281), Orion-1-90 (6183).
  509. config ARCH_MMP
  510. bool "Marvell PXA168/910/MMP2"
  511. depends on MMU
  512. select ARCH_REQUIRE_GPIOLIB
  513. select CLKDEV_LOOKUP
  514. select GENERIC_ALLOCATOR
  515. select GENERIC_CLOCKEVENTS
  516. select GPIO_PXA
  517. select IRQ_DOMAIN
  518. select NEED_MACH_GPIO_H
  519. select PINCTRL
  520. select PLAT_PXA
  521. select SPARSE_IRQ
  522. help
  523. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  524. config ARCH_KS8695
  525. bool "Micrel/Kendin KS8695"
  526. select ARCH_REQUIRE_GPIOLIB
  527. select CLKSRC_MMIO
  528. select CPU_ARM922T
  529. select GENERIC_CLOCKEVENTS
  530. select NEED_MACH_MEMORY_H
  531. help
  532. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  533. System-on-Chip devices.
  534. config ARCH_W90X900
  535. bool "Nuvoton W90X900 CPU"
  536. select ARCH_REQUIRE_GPIOLIB
  537. select CLKDEV_LOOKUP
  538. select CLKSRC_MMIO
  539. select CPU_ARM926T
  540. select GENERIC_CLOCKEVENTS
  541. help
  542. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  543. At present, the w90x900 has been renamed nuc900, regarding
  544. the ARM series product line, you can login the following
  545. link address to know more.
  546. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  547. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  548. config ARCH_LPC32XX
  549. bool "NXP LPC32XX"
  550. select ARCH_REQUIRE_GPIOLIB
  551. select ARM_AMBA
  552. select CLKDEV_LOOKUP
  553. select CLKSRC_MMIO
  554. select CPU_ARM926T
  555. select GENERIC_CLOCKEVENTS
  556. select HAVE_IDE
  557. select HAVE_PWM
  558. select USB_ARCH_HAS_OHCI
  559. select USE_OF
  560. help
  561. Support for the NXP LPC32XX family of processors
  562. config ARCH_TEGRA
  563. bool "NVIDIA Tegra"
  564. select ARCH_HAS_CPUFREQ
  565. select CLKDEV_LOOKUP
  566. select CLKSRC_MMIO
  567. select COMMON_CLK
  568. select GENERIC_CLOCKEVENTS
  569. select GENERIC_GPIO
  570. select HAVE_CLK
  571. select HAVE_SMP
  572. select MIGHT_HAVE_CACHE_L2X0
  573. select SPARSE_IRQ
  574. select USE_OF
  575. help
  576. This enables support for NVIDIA Tegra based systems (Tegra APX,
  577. Tegra 6xx and Tegra 2 series).
  578. config ARCH_PXA
  579. bool "PXA2xx/PXA3xx-based"
  580. depends on MMU
  581. select ARCH_HAS_CPUFREQ
  582. select ARCH_MTD_XIP
  583. select ARCH_REQUIRE_GPIOLIB
  584. select ARM_CPU_SUSPEND if PM
  585. select AUTO_ZRELADDR
  586. select CLKDEV_LOOKUP
  587. select CLKSRC_MMIO
  588. select GENERIC_CLOCKEVENTS
  589. select GPIO_PXA
  590. select HAVE_IDE
  591. select MULTI_IRQ_HANDLER
  592. select NEED_MACH_GPIO_H
  593. select PLAT_PXA
  594. select SPARSE_IRQ
  595. help
  596. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  597. config ARCH_MSM
  598. bool "Qualcomm MSM"
  599. select ARCH_REQUIRE_GPIOLIB
  600. select CLKDEV_LOOKUP
  601. select GENERIC_CLOCKEVENTS
  602. select HAVE_CLK
  603. help
  604. Support for Qualcomm MSM/QSD based systems. This runs on the
  605. apps processor of the MSM/QSD and depends on a shared memory
  606. interface to the modem processor which runs the baseband
  607. stack and controls some vital subsystems
  608. (clock and power control, etc).
  609. config ARCH_SHMOBILE
  610. bool "Renesas SH-Mobile / R-Mobile"
  611. select CLKDEV_LOOKUP
  612. select GENERIC_CLOCKEVENTS
  613. select HAVE_CLK
  614. select HAVE_MACH_CLKDEV
  615. select HAVE_SMP
  616. select MIGHT_HAVE_CACHE_L2X0
  617. select MULTI_IRQ_HANDLER
  618. select NEED_MACH_MEMORY_H
  619. select NO_IOPORT
  620. select PM_GENERIC_DOMAINS if PM
  621. select SPARSE_IRQ
  622. help
  623. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  624. config ARCH_RPC
  625. bool "RiscPC"
  626. select ARCH_ACORN
  627. select ARCH_MAY_HAVE_PC_FDC
  628. select ARCH_SPARSEMEM_ENABLE
  629. select ARCH_USES_GETTIMEOFFSET
  630. select FIQ
  631. select HAVE_IDE
  632. select HAVE_PATA_PLATFORM
  633. select ISA_DMA_API
  634. select NEED_MACH_IO_H
  635. select NEED_MACH_MEMORY_H
  636. select NO_IOPORT
  637. help
  638. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  639. CD-ROM interface, serial and parallel port, and the floppy drive.
  640. config ARCH_SA1100
  641. bool "SA1100-based"
  642. select ARCH_HAS_CPUFREQ
  643. select ARCH_MTD_XIP
  644. select ARCH_REQUIRE_GPIOLIB
  645. select ARCH_SPARSEMEM_ENABLE
  646. select CLKDEV_LOOKUP
  647. select CLKSRC_MMIO
  648. select CPU_FREQ
  649. select CPU_SA1100
  650. select GENERIC_CLOCKEVENTS
  651. select HAVE_IDE
  652. select ISA
  653. select NEED_MACH_GPIO_H
  654. select NEED_MACH_MEMORY_H
  655. select SPARSE_IRQ
  656. help
  657. Support for StrongARM 11x0 based boards.
  658. config ARCH_S3C24XX
  659. bool "Samsung S3C24XX SoCs"
  660. select ARCH_HAS_CPUFREQ
  661. select ARCH_USES_GETTIMEOFFSET
  662. select CLKDEV_LOOKUP
  663. select GENERIC_GPIO
  664. select HAVE_CLK
  665. select HAVE_S3C2410_I2C if I2C
  666. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  667. select HAVE_S3C_RTC if RTC_CLASS
  668. select NEED_MACH_GPIO_H
  669. select NEED_MACH_IO_H
  670. help
  671. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  672. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  673. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  674. Samsung SMDK2410 development board (and derivatives).
  675. config ARCH_S3C64XX
  676. bool "Samsung S3C64XX"
  677. select ARCH_HAS_CPUFREQ
  678. select ARCH_REQUIRE_GPIOLIB
  679. select ARCH_USES_GETTIMEOFFSET
  680. select ARM_VIC
  681. select CLKDEV_LOOKUP
  682. select CPU_V6
  683. select HAVE_CLK
  684. select HAVE_S3C2410_I2C if I2C
  685. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  686. select HAVE_TCM
  687. select NEED_MACH_GPIO_H
  688. select NO_IOPORT
  689. select PLAT_SAMSUNG
  690. select S3C_DEV_NAND
  691. select S3C_GPIO_TRACK
  692. select SAMSUNG_CLKSRC
  693. select SAMSUNG_GPIOLIB_4BIT
  694. select SAMSUNG_IRQ_VIC_TIMER
  695. select USB_ARCH_HAS_OHCI
  696. help
  697. Samsung S3C64XX series based systems
  698. config ARCH_S5P64X0
  699. bool "Samsung S5P6440 S5P6450"
  700. select CLKDEV_LOOKUP
  701. select CLKSRC_MMIO
  702. select CPU_V6
  703. select GENERIC_CLOCKEVENTS
  704. select GENERIC_GPIO
  705. select HAVE_CLK
  706. select HAVE_S3C2410_I2C if I2C
  707. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  708. select HAVE_S3C_RTC if RTC_CLASS
  709. select NEED_MACH_GPIO_H
  710. help
  711. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  712. SMDK6450.
  713. config ARCH_S5PC100
  714. bool "Samsung S5PC100"
  715. select ARCH_USES_GETTIMEOFFSET
  716. select CLKDEV_LOOKUP
  717. select CPU_V7
  718. select GENERIC_GPIO
  719. select HAVE_CLK
  720. select HAVE_S3C2410_I2C if I2C
  721. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  722. select HAVE_S3C_RTC if RTC_CLASS
  723. select NEED_MACH_GPIO_H
  724. help
  725. Samsung S5PC100 series based systems
  726. config ARCH_S5PV210
  727. bool "Samsung S5PV210/S5PC110"
  728. select ARCH_HAS_CPUFREQ
  729. select ARCH_HAS_HOLES_MEMORYMODEL
  730. select ARCH_SPARSEMEM_ENABLE
  731. select CLKDEV_LOOKUP
  732. select CLKSRC_MMIO
  733. select CPU_V7
  734. select GENERIC_CLOCKEVENTS
  735. select GENERIC_GPIO
  736. select HAVE_CLK
  737. select HAVE_S3C2410_I2C if I2C
  738. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  739. select HAVE_S3C_RTC if RTC_CLASS
  740. select NEED_MACH_GPIO_H
  741. select NEED_MACH_MEMORY_H
  742. help
  743. Samsung S5PV210/S5PC110 series based systems
  744. config ARCH_EXYNOS
  745. bool "Samsung EXYNOS"
  746. select ARCH_HAS_CPUFREQ
  747. select ARCH_HAS_HOLES_MEMORYMODEL
  748. select ARCH_SPARSEMEM_ENABLE
  749. select CLKDEV_LOOKUP
  750. select CPU_V7
  751. select GENERIC_CLOCKEVENTS
  752. select GENERIC_GPIO
  753. select HAVE_CLK
  754. select HAVE_S3C2410_I2C if I2C
  755. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  756. select HAVE_S3C_RTC if RTC_CLASS
  757. select NEED_MACH_GPIO_H
  758. select NEED_MACH_MEMORY_H
  759. help
  760. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  761. config ARCH_SHARK
  762. bool "Shark"
  763. select ARCH_USES_GETTIMEOFFSET
  764. select CPU_SA110
  765. select ISA
  766. select ISA_DMA
  767. select NEED_MACH_MEMORY_H
  768. select PCI
  769. select ZONE_DMA
  770. help
  771. Support for the StrongARM based Digital DNARD machine, also known
  772. as "Shark" (<http://www.shark-linux.de/shark.html>).
  773. config ARCH_U300
  774. bool "ST-Ericsson U300 Series"
  775. depends on MMU
  776. select ARCH_REQUIRE_GPIOLIB
  777. select ARM_AMBA
  778. select ARM_PATCH_PHYS_VIRT
  779. select ARM_VIC
  780. select CLKDEV_LOOKUP
  781. select CLKSRC_MMIO
  782. select COMMON_CLK
  783. select CPU_ARM926T
  784. select GENERIC_CLOCKEVENTS
  785. select GENERIC_GPIO
  786. select HAVE_TCM
  787. select SPARSE_IRQ
  788. help
  789. Support for ST-Ericsson U300 series mobile platforms.
  790. config ARCH_U8500
  791. bool "ST-Ericsson U8500 Series"
  792. depends on MMU
  793. select ARCH_HAS_CPUFREQ
  794. select ARCH_REQUIRE_GPIOLIB
  795. select ARM_AMBA
  796. select CLKDEV_LOOKUP
  797. select CPU_V7
  798. select GENERIC_CLOCKEVENTS
  799. select HAVE_SMP
  800. select MIGHT_HAVE_CACHE_L2X0
  801. select SPARSE_IRQ
  802. help
  803. Support for ST-Ericsson's Ux500 architecture
  804. config ARCH_NOMADIK
  805. bool "STMicroelectronics Nomadik"
  806. select ARCH_REQUIRE_GPIOLIB
  807. select ARM_AMBA
  808. select ARM_VIC
  809. select CLKSRC_NOMADIK_MTU
  810. select COMMON_CLK
  811. select CPU_ARM926T
  812. select GENERIC_CLOCKEVENTS
  813. select MIGHT_HAVE_CACHE_L2X0
  814. select USE_OF
  815. select PINCTRL
  816. select PINCTRL_STN8815
  817. select SPARSE_IRQ
  818. help
  819. Support for the Nomadik platform by ST-Ericsson
  820. config PLAT_SPEAR
  821. bool "ST SPEAr"
  822. select ARCH_HAS_CPUFREQ
  823. select ARCH_REQUIRE_GPIOLIB
  824. select ARM_AMBA
  825. select CLKDEV_LOOKUP
  826. select CLKSRC_MMIO
  827. select COMMON_CLK
  828. select GENERIC_CLOCKEVENTS
  829. select HAVE_CLK
  830. help
  831. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  832. config ARCH_DAVINCI
  833. bool "TI DaVinci"
  834. select ARCH_HAS_HOLES_MEMORYMODEL
  835. select ARCH_REQUIRE_GPIOLIB
  836. select CLKDEV_LOOKUP
  837. select GENERIC_ALLOCATOR
  838. select GENERIC_CLOCKEVENTS
  839. select GENERIC_IRQ_CHIP
  840. select HAVE_IDE
  841. select NEED_MACH_GPIO_H
  842. select USE_OF
  843. select ZONE_DMA
  844. help
  845. Support for TI's DaVinci platform.
  846. config ARCH_OMAP
  847. bool "TI OMAP"
  848. depends on MMU
  849. select ARCH_HAS_CPUFREQ
  850. select ARCH_HAS_HOLES_MEMORYMODEL
  851. select ARCH_REQUIRE_GPIOLIB
  852. select CLKSRC_MMIO
  853. select GENERIC_CLOCKEVENTS
  854. select HAVE_CLK
  855. help
  856. Support for TI's OMAP platform (OMAP1/2/3/4).
  857. config ARCH_VT8500_SINGLE
  858. bool "VIA/WonderMedia 85xx"
  859. select ARCH_HAS_CPUFREQ
  860. select ARCH_REQUIRE_GPIOLIB
  861. select CLKDEV_LOOKUP
  862. select COMMON_CLK
  863. select CPU_ARM926T
  864. select GENERIC_CLOCKEVENTS
  865. select GENERIC_GPIO
  866. select HAVE_CLK
  867. select MULTI_IRQ_HANDLER
  868. select SPARSE_IRQ
  869. select USE_OF
  870. help
  871. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  872. endchoice
  873. menu "Multiple platform selection"
  874. depends on ARCH_MULTIPLATFORM
  875. comment "CPU Core family selection"
  876. config ARCH_MULTI_V4
  877. bool "ARMv4 based platforms (FA526, StrongARM)"
  878. depends on !ARCH_MULTI_V6_V7
  879. select ARCH_MULTI_V4_V5
  880. config ARCH_MULTI_V4T
  881. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  882. depends on !ARCH_MULTI_V6_V7
  883. select ARCH_MULTI_V4_V5
  884. config ARCH_MULTI_V5
  885. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  886. depends on !ARCH_MULTI_V6_V7
  887. select ARCH_MULTI_V4_V5
  888. config ARCH_MULTI_V4_V5
  889. bool
  890. config ARCH_MULTI_V6
  891. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  892. select ARCH_MULTI_V6_V7
  893. select CPU_V6
  894. config ARCH_MULTI_V7
  895. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  896. default y
  897. select ARCH_MULTI_V6_V7
  898. select ARCH_VEXPRESS
  899. select CPU_V7
  900. config ARCH_MULTI_V6_V7
  901. bool
  902. config ARCH_MULTI_CPU_AUTO
  903. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  904. select ARCH_MULTI_V5
  905. endmenu
  906. #
  907. # This is sorted alphabetically by mach-* pathname. However, plat-*
  908. # Kconfigs may be included either alphabetically (according to the
  909. # plat- suffix) or along side the corresponding mach-* source.
  910. #
  911. source "arch/arm/mach-mvebu/Kconfig"
  912. source "arch/arm/mach-at91/Kconfig"
  913. source "arch/arm/mach-bcm/Kconfig"
  914. source "arch/arm/mach-clps711x/Kconfig"
  915. source "arch/arm/mach-cns3xxx/Kconfig"
  916. source "arch/arm/mach-davinci/Kconfig"
  917. source "arch/arm/mach-dove/Kconfig"
  918. source "arch/arm/mach-ep93xx/Kconfig"
  919. source "arch/arm/mach-footbridge/Kconfig"
  920. source "arch/arm/mach-gemini/Kconfig"
  921. source "arch/arm/mach-h720x/Kconfig"
  922. source "arch/arm/mach-highbank/Kconfig"
  923. source "arch/arm/mach-integrator/Kconfig"
  924. source "arch/arm/mach-iop32x/Kconfig"
  925. source "arch/arm/mach-iop33x/Kconfig"
  926. source "arch/arm/mach-iop13xx/Kconfig"
  927. source "arch/arm/mach-ixp4xx/Kconfig"
  928. source "arch/arm/mach-kirkwood/Kconfig"
  929. source "arch/arm/mach-ks8695/Kconfig"
  930. source "arch/arm/mach-msm/Kconfig"
  931. source "arch/arm/mach-mv78xx0/Kconfig"
  932. source "arch/arm/mach-imx/Kconfig"
  933. source "arch/arm/mach-mxs/Kconfig"
  934. source "arch/arm/mach-netx/Kconfig"
  935. source "arch/arm/mach-nomadik/Kconfig"
  936. source "arch/arm/plat-omap/Kconfig"
  937. source "arch/arm/mach-omap1/Kconfig"
  938. source "arch/arm/mach-omap2/Kconfig"
  939. source "arch/arm/mach-orion5x/Kconfig"
  940. source "arch/arm/mach-picoxcell/Kconfig"
  941. source "arch/arm/mach-pxa/Kconfig"
  942. source "arch/arm/plat-pxa/Kconfig"
  943. source "arch/arm/mach-mmp/Kconfig"
  944. source "arch/arm/mach-realview/Kconfig"
  945. source "arch/arm/mach-sa1100/Kconfig"
  946. source "arch/arm/plat-samsung/Kconfig"
  947. source "arch/arm/plat-s3c24xx/Kconfig"
  948. source "arch/arm/mach-socfpga/Kconfig"
  949. source "arch/arm/plat-spear/Kconfig"
  950. source "arch/arm/mach-s3c24xx/Kconfig"
  951. if ARCH_S3C24XX
  952. source "arch/arm/mach-s3c2412/Kconfig"
  953. source "arch/arm/mach-s3c2440/Kconfig"
  954. endif
  955. if ARCH_S3C64XX
  956. source "arch/arm/mach-s3c64xx/Kconfig"
  957. endif
  958. source "arch/arm/mach-s5p64x0/Kconfig"
  959. source "arch/arm/mach-s5pc100/Kconfig"
  960. source "arch/arm/mach-s5pv210/Kconfig"
  961. source "arch/arm/mach-exynos/Kconfig"
  962. source "arch/arm/mach-shmobile/Kconfig"
  963. source "arch/arm/mach-sunxi/Kconfig"
  964. source "arch/arm/mach-prima2/Kconfig"
  965. source "arch/arm/mach-tegra/Kconfig"
  966. source "arch/arm/mach-u300/Kconfig"
  967. source "arch/arm/mach-ux500/Kconfig"
  968. source "arch/arm/mach-versatile/Kconfig"
  969. source "arch/arm/mach-vexpress/Kconfig"
  970. source "arch/arm/plat-versatile/Kconfig"
  971. source "arch/arm/mach-vt8500/Kconfig"
  972. source "arch/arm/mach-w90x900/Kconfig"
  973. source "arch/arm/mach-zynq/Kconfig"
  974. # Definitions to make life easier
  975. config ARCH_ACORN
  976. bool
  977. config PLAT_IOP
  978. bool
  979. select GENERIC_CLOCKEVENTS
  980. config PLAT_ORION
  981. bool
  982. select CLKSRC_MMIO
  983. select COMMON_CLK
  984. select GENERIC_IRQ_CHIP
  985. select IRQ_DOMAIN
  986. config PLAT_ORION_LEGACY
  987. bool
  988. select PLAT_ORION
  989. config PLAT_PXA
  990. bool
  991. config PLAT_VERSATILE
  992. bool
  993. config ARM_TIMER_SP804
  994. bool
  995. select CLKSRC_MMIO
  996. select HAVE_SCHED_CLOCK
  997. source arch/arm/mm/Kconfig
  998. config ARM_NR_BANKS
  999. int
  1000. default 16 if ARCH_EP93XX
  1001. default 8
  1002. config IWMMXT
  1003. bool "Enable iWMMXt support"
  1004. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1005. default y if PXA27x || PXA3xx || ARCH_MMP
  1006. help
  1007. Enable support for iWMMXt context switching at run time if
  1008. running on a CPU that supports it.
  1009. config XSCALE_PMU
  1010. bool
  1011. depends on CPU_XSCALE
  1012. default y
  1013. config MULTI_IRQ_HANDLER
  1014. bool
  1015. help
  1016. Allow each machine to specify it's own IRQ handler at run time.
  1017. if !MMU
  1018. source "arch/arm/Kconfig-nommu"
  1019. endif
  1020. config ARM_ERRATA_326103
  1021. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1022. depends on CPU_V6
  1023. help
  1024. Executing a SWP instruction to read-only memory does not set bit 11
  1025. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1026. treat the access as a read, preventing a COW from occurring and
  1027. causing the faulting task to livelock.
  1028. config ARM_ERRATA_411920
  1029. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1030. depends on CPU_V6 || CPU_V6K
  1031. help
  1032. Invalidation of the Instruction Cache operation can
  1033. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1034. It does not affect the MPCore. This option enables the ARM Ltd.
  1035. recommended workaround.
  1036. config ARM_ERRATA_430973
  1037. bool "ARM errata: Stale prediction on replaced interworking branch"
  1038. depends on CPU_V7
  1039. help
  1040. This option enables the workaround for the 430973 Cortex-A8
  1041. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1042. interworking branch is replaced with another code sequence at the
  1043. same virtual address, whether due to self-modifying code or virtual
  1044. to physical address re-mapping, Cortex-A8 does not recover from the
  1045. stale interworking branch prediction. This results in Cortex-A8
  1046. executing the new code sequence in the incorrect ARM or Thumb state.
  1047. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1048. and also flushes the branch target cache at every context switch.
  1049. Note that setting specific bits in the ACTLR register may not be
  1050. available in non-secure mode.
  1051. config ARM_ERRATA_458693
  1052. bool "ARM errata: Processor deadlock when a false hazard is created"
  1053. depends on CPU_V7
  1054. depends on !ARCH_MULTIPLATFORM
  1055. help
  1056. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1057. erratum. For very specific sequences of memory operations, it is
  1058. possible for a hazard condition intended for a cache line to instead
  1059. be incorrectly associated with a different cache line. This false
  1060. hazard might then cause a processor deadlock. The workaround enables
  1061. the L1 caching of the NEON accesses and disables the PLD instruction
  1062. in the ACTLR register. Note that setting specific bits in the ACTLR
  1063. register may not be available in non-secure mode.
  1064. config ARM_ERRATA_460075
  1065. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1066. depends on CPU_V7
  1067. depends on !ARCH_MULTIPLATFORM
  1068. help
  1069. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1070. erratum. Any asynchronous access to the L2 cache may encounter a
  1071. situation in which recent store transactions to the L2 cache are lost
  1072. and overwritten with stale memory contents from external memory. The
  1073. workaround disables the write-allocate mode for the L2 cache via the
  1074. ACTLR register. Note that setting specific bits in the ACTLR register
  1075. may not be available in non-secure mode.
  1076. config ARM_ERRATA_742230
  1077. bool "ARM errata: DMB operation may be faulty"
  1078. depends on CPU_V7 && SMP
  1079. depends on !ARCH_MULTIPLATFORM
  1080. help
  1081. This option enables the workaround for the 742230 Cortex-A9
  1082. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1083. between two write operations may not ensure the correct visibility
  1084. ordering of the two writes. This workaround sets a specific bit in
  1085. the diagnostic register of the Cortex-A9 which causes the DMB
  1086. instruction to behave as a DSB, ensuring the correct behaviour of
  1087. the two writes.
  1088. config ARM_ERRATA_742231
  1089. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1090. depends on CPU_V7 && SMP
  1091. depends on !ARCH_MULTIPLATFORM
  1092. help
  1093. This option enables the workaround for the 742231 Cortex-A9
  1094. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1095. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1096. accessing some data located in the same cache line, may get corrupted
  1097. data due to bad handling of the address hazard when the line gets
  1098. replaced from one of the CPUs at the same time as another CPU is
  1099. accessing it. This workaround sets specific bits in the diagnostic
  1100. register of the Cortex-A9 which reduces the linefill issuing
  1101. capabilities of the processor.
  1102. config PL310_ERRATA_588369
  1103. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1104. depends on CACHE_L2X0
  1105. help
  1106. The PL310 L2 cache controller implements three types of Clean &
  1107. Invalidate maintenance operations: by Physical Address
  1108. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1109. They are architecturally defined to behave as the execution of a
  1110. clean operation followed immediately by an invalidate operation,
  1111. both performing to the same memory location. This functionality
  1112. is not correctly implemented in PL310 as clean lines are not
  1113. invalidated as a result of these operations.
  1114. config ARM_ERRATA_720789
  1115. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1116. depends on CPU_V7
  1117. help
  1118. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1119. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1120. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1121. As a consequence of this erratum, some TLB entries which should be
  1122. invalidated are not, resulting in an incoherency in the system page
  1123. tables. The workaround changes the TLB flushing routines to invalidate
  1124. entries regardless of the ASID.
  1125. config PL310_ERRATA_727915
  1126. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1127. depends on CACHE_L2X0
  1128. help
  1129. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1130. operation (offset 0x7FC). This operation runs in background so that
  1131. PL310 can handle normal accesses while it is in progress. Under very
  1132. rare circumstances, due to this erratum, write data can be lost when
  1133. PL310 treats a cacheable write transaction during a Clean &
  1134. Invalidate by Way operation.
  1135. config ARM_ERRATA_743622
  1136. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1137. depends on CPU_V7
  1138. depends on !ARCH_MULTIPLATFORM
  1139. help
  1140. This option enables the workaround for the 743622 Cortex-A9
  1141. (r2p*) erratum. Under very rare conditions, a faulty
  1142. optimisation in the Cortex-A9 Store Buffer may lead to data
  1143. corruption. This workaround sets a specific bit in the diagnostic
  1144. register of the Cortex-A9 which disables the Store Buffer
  1145. optimisation, preventing the defect from occurring. This has no
  1146. visible impact on the overall performance or power consumption of the
  1147. processor.
  1148. config ARM_ERRATA_751472
  1149. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1150. depends on CPU_V7
  1151. depends on !ARCH_MULTIPLATFORM
  1152. help
  1153. This option enables the workaround for the 751472 Cortex-A9 (prior
  1154. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1155. completion of a following broadcasted operation if the second
  1156. operation is received by a CPU before the ICIALLUIS has completed,
  1157. potentially leading to corrupted entries in the cache or TLB.
  1158. config PL310_ERRATA_753970
  1159. bool "PL310 errata: cache sync operation may be faulty"
  1160. depends on CACHE_PL310
  1161. help
  1162. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1163. Under some condition the effect of cache sync operation on
  1164. the store buffer still remains when the operation completes.
  1165. This means that the store buffer is always asked to drain and
  1166. this prevents it from merging any further writes. The workaround
  1167. is to replace the normal offset of cache sync operation (0x730)
  1168. by another offset targeting an unmapped PL310 register 0x740.
  1169. This has the same effect as the cache sync operation: store buffer
  1170. drain and waiting for all buffers empty.
  1171. config ARM_ERRATA_754322
  1172. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1173. depends on CPU_V7
  1174. help
  1175. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1176. r3p*) erratum. A speculative memory access may cause a page table walk
  1177. which starts prior to an ASID switch but completes afterwards. This
  1178. can populate the micro-TLB with a stale entry which may be hit with
  1179. the new ASID. This workaround places two dsb instructions in the mm
  1180. switching code so that no page table walks can cross the ASID switch.
  1181. config ARM_ERRATA_754327
  1182. bool "ARM errata: no automatic Store Buffer drain"
  1183. depends on CPU_V7 && SMP
  1184. help
  1185. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1186. r2p0) erratum. The Store Buffer does not have any automatic draining
  1187. mechanism and therefore a livelock may occur if an external agent
  1188. continuously polls a memory location waiting to observe an update.
  1189. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1190. written polling loops from denying visibility of updates to memory.
  1191. config ARM_ERRATA_364296
  1192. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1193. depends on CPU_V6 && !SMP
  1194. help
  1195. This options enables the workaround for the 364296 ARM1136
  1196. r0p2 erratum (possible cache data corruption with
  1197. hit-under-miss enabled). It sets the undocumented bit 31 in
  1198. the auxiliary control register and the FI bit in the control
  1199. register, thus disabling hit-under-miss without putting the
  1200. processor into full low interrupt latency mode. ARM11MPCore
  1201. is not affected.
  1202. config ARM_ERRATA_764369
  1203. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1204. depends on CPU_V7 && SMP
  1205. help
  1206. This option enables the workaround for erratum 764369
  1207. affecting Cortex-A9 MPCore with two or more processors (all
  1208. current revisions). Under certain timing circumstances, a data
  1209. cache line maintenance operation by MVA targeting an Inner
  1210. Shareable memory region may fail to proceed up to either the
  1211. Point of Coherency or to the Point of Unification of the
  1212. system. This workaround adds a DSB instruction before the
  1213. relevant cache maintenance functions and sets a specific bit
  1214. in the diagnostic control register of the SCU.
  1215. config PL310_ERRATA_769419
  1216. bool "PL310 errata: no automatic Store Buffer drain"
  1217. depends on CACHE_L2X0
  1218. help
  1219. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1220. not automatically drain. This can cause normal, non-cacheable
  1221. writes to be retained when the memory system is idle, leading
  1222. to suboptimal I/O performance for drivers using coherent DMA.
  1223. This option adds a write barrier to the cpu_idle loop so that,
  1224. on systems with an outer cache, the store buffer is drained
  1225. explicitly.
  1226. config ARM_ERRATA_775420
  1227. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1228. depends on CPU_V7
  1229. help
  1230. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1231. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1232. operation aborts with MMU exception, it might cause the processor
  1233. to deadlock. This workaround puts DSB before executing ISB if
  1234. an abort may occur on cache maintenance.
  1235. endmenu
  1236. source "arch/arm/common/Kconfig"
  1237. menu "Bus support"
  1238. config ARM_AMBA
  1239. bool
  1240. config ISA
  1241. bool
  1242. help
  1243. Find out whether you have ISA slots on your motherboard. ISA is the
  1244. name of a bus system, i.e. the way the CPU talks to the other stuff
  1245. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1246. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1247. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1248. # Select ISA DMA controller support
  1249. config ISA_DMA
  1250. bool
  1251. select ISA_DMA_API
  1252. # Select ISA DMA interface
  1253. config ISA_DMA_API
  1254. bool
  1255. config PCI
  1256. bool "PCI support" if MIGHT_HAVE_PCI
  1257. help
  1258. Find out whether you have a PCI motherboard. PCI is the name of a
  1259. bus system, i.e. the way the CPU talks to the other stuff inside
  1260. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1261. VESA. If you have PCI, say Y, otherwise N.
  1262. config PCI_DOMAINS
  1263. bool
  1264. depends on PCI
  1265. config PCI_NANOENGINE
  1266. bool "BSE nanoEngine PCI support"
  1267. depends on SA1100_NANOENGINE
  1268. help
  1269. Enable PCI on the BSE nanoEngine board.
  1270. config PCI_SYSCALL
  1271. def_bool PCI
  1272. # Select the host bridge type
  1273. config PCI_HOST_VIA82C505
  1274. bool
  1275. depends on PCI && ARCH_SHARK
  1276. default y
  1277. config PCI_HOST_ITE8152
  1278. bool
  1279. depends on PCI && MACH_ARMCORE
  1280. default y
  1281. select DMABOUNCE
  1282. source "drivers/pci/Kconfig"
  1283. source "drivers/pcmcia/Kconfig"
  1284. endmenu
  1285. menu "Kernel Features"
  1286. config HAVE_SMP
  1287. bool
  1288. help
  1289. This option should be selected by machines which have an SMP-
  1290. capable CPU.
  1291. The only effect of this option is to make the SMP-related
  1292. options available to the user for configuration.
  1293. config SMP
  1294. bool "Symmetric Multi-Processing"
  1295. depends on CPU_V6K || CPU_V7
  1296. depends on GENERIC_CLOCKEVENTS
  1297. depends on HAVE_SMP
  1298. depends on MMU
  1299. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1300. select USE_GENERIC_SMP_HELPERS
  1301. help
  1302. This enables support for systems with more than one CPU. If you have
  1303. a system with only one CPU, like most personal computers, say N. If
  1304. you have a system with more than one CPU, say Y.
  1305. If you say N here, the kernel will run on single and multiprocessor
  1306. machines, but will use only one CPU of a multiprocessor machine. If
  1307. you say Y here, the kernel will run on many, but not all, single
  1308. processor machines. On a single processor machine, the kernel will
  1309. run faster if you say N here.
  1310. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1311. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1312. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1313. If you don't know what to do here, say N.
  1314. config SMP_ON_UP
  1315. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1316. depends on EXPERIMENTAL
  1317. depends on SMP && !XIP_KERNEL
  1318. default y
  1319. help
  1320. SMP kernels contain instructions which fail on non-SMP processors.
  1321. Enabling this option allows the kernel to modify itself to make
  1322. these instructions safe. Disabling it allows about 1K of space
  1323. savings.
  1324. If you don't know what to do here, say Y.
  1325. config ARM_CPU_TOPOLOGY
  1326. bool "Support cpu topology definition"
  1327. depends on SMP && CPU_V7
  1328. default y
  1329. help
  1330. Support ARM cpu topology definition. The MPIDR register defines
  1331. affinity between processors which is then used to describe the cpu
  1332. topology of an ARM System.
  1333. config SCHED_MC
  1334. bool "Multi-core scheduler support"
  1335. depends on ARM_CPU_TOPOLOGY
  1336. help
  1337. Multi-core scheduler support improves the CPU scheduler's decision
  1338. making when dealing with multi-core CPU chips at a cost of slightly
  1339. increased overhead in some places. If unsure say N here.
  1340. config SCHED_SMT
  1341. bool "SMT scheduler support"
  1342. depends on ARM_CPU_TOPOLOGY
  1343. help
  1344. Improves the CPU scheduler's decision making when dealing with
  1345. MultiThreading at a cost of slightly increased overhead in some
  1346. places. If unsure say N here.
  1347. config HAVE_ARM_SCU
  1348. bool
  1349. help
  1350. This option enables support for the ARM system coherency unit
  1351. config ARM_ARCH_TIMER
  1352. bool "Architected timer support"
  1353. depends on CPU_V7
  1354. help
  1355. This option enables support for the ARM architected timer
  1356. config HAVE_ARM_TWD
  1357. bool
  1358. depends on SMP
  1359. help
  1360. This options enables support for the ARM timer and watchdog unit
  1361. choice
  1362. prompt "Memory split"
  1363. default VMSPLIT_3G
  1364. help
  1365. Select the desired split between kernel and user memory.
  1366. If you are not absolutely sure what you are doing, leave this
  1367. option alone!
  1368. config VMSPLIT_3G
  1369. bool "3G/1G user/kernel split"
  1370. config VMSPLIT_2G
  1371. bool "2G/2G user/kernel split"
  1372. config VMSPLIT_1G
  1373. bool "1G/3G user/kernel split"
  1374. endchoice
  1375. config PAGE_OFFSET
  1376. hex
  1377. default 0x40000000 if VMSPLIT_1G
  1378. default 0x80000000 if VMSPLIT_2G
  1379. default 0xC0000000
  1380. config NR_CPUS
  1381. int "Maximum number of CPUs (2-32)"
  1382. range 2 32
  1383. depends on SMP
  1384. default "4"
  1385. config HOTPLUG_CPU
  1386. bool "Support for hot-pluggable CPUs"
  1387. depends on SMP && HOTPLUG
  1388. help
  1389. Say Y here to experiment with turning CPUs off and on. CPUs
  1390. can be controlled through /sys/devices/system/cpu.
  1391. config LOCAL_TIMERS
  1392. bool "Use local timer interrupts"
  1393. depends on SMP
  1394. default y
  1395. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1396. help
  1397. Enable support for local timers on SMP platforms, rather then the
  1398. legacy IPI broadcast method. Local timers allows the system
  1399. accounting to be spread across the timer interval, preventing a
  1400. "thundering herd" at every timer tick.
  1401. config ARCH_NR_GPIO
  1402. int
  1403. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1404. default 355 if ARCH_U8500
  1405. default 264 if MACH_H4700
  1406. default 512 if SOC_OMAP5
  1407. default 288 if ARCH_VT8500
  1408. default 0
  1409. help
  1410. Maximum number of GPIOs in the system.
  1411. If unsure, leave the default value.
  1412. source kernel/Kconfig.preempt
  1413. config HZ
  1414. int
  1415. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1416. ARCH_S5PV210 || ARCH_EXYNOS4
  1417. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1418. default AT91_TIMER_HZ if ARCH_AT91
  1419. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1420. default 100
  1421. config THUMB2_KERNEL
  1422. bool "Compile the kernel in Thumb-2 mode"
  1423. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1424. select AEABI
  1425. select ARM_ASM_UNIFIED
  1426. select ARM_UNWIND
  1427. help
  1428. By enabling this option, the kernel will be compiled in
  1429. Thumb-2 mode. A compiler/assembler that understand the unified
  1430. ARM-Thumb syntax is needed.
  1431. If unsure, say N.
  1432. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1433. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1434. depends on THUMB2_KERNEL && MODULES
  1435. default y
  1436. help
  1437. Various binutils versions can resolve Thumb-2 branches to
  1438. locally-defined, preemptible global symbols as short-range "b.n"
  1439. branch instructions.
  1440. This is a problem, because there's no guarantee the final
  1441. destination of the symbol, or any candidate locations for a
  1442. trampoline, are within range of the branch. For this reason, the
  1443. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1444. relocation in modules at all, and it makes little sense to add
  1445. support.
  1446. The symptom is that the kernel fails with an "unsupported
  1447. relocation" error when loading some modules.
  1448. Until fixed tools are available, passing
  1449. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1450. code which hits this problem, at the cost of a bit of extra runtime
  1451. stack usage in some cases.
  1452. The problem is described in more detail at:
  1453. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1454. Only Thumb-2 kernels are affected.
  1455. Unless you are sure your tools don't have this problem, say Y.
  1456. config ARM_ASM_UNIFIED
  1457. bool
  1458. config AEABI
  1459. bool "Use the ARM EABI to compile the kernel"
  1460. help
  1461. This option allows for the kernel to be compiled using the latest
  1462. ARM ABI (aka EABI). This is only useful if you are using a user
  1463. space environment that is also compiled with EABI.
  1464. Since there are major incompatibilities between the legacy ABI and
  1465. EABI, especially with regard to structure member alignment, this
  1466. option also changes the kernel syscall calling convention to
  1467. disambiguate both ABIs and allow for backward compatibility support
  1468. (selected with CONFIG_OABI_COMPAT).
  1469. To use this you need GCC version 4.0.0 or later.
  1470. config OABI_COMPAT
  1471. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1472. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1473. default y
  1474. help
  1475. This option preserves the old syscall interface along with the
  1476. new (ARM EABI) one. It also provides a compatibility layer to
  1477. intercept syscalls that have structure arguments which layout
  1478. in memory differs between the legacy ABI and the new ARM EABI
  1479. (only for non "thumb" binaries). This option adds a tiny
  1480. overhead to all syscalls and produces a slightly larger kernel.
  1481. If you know you'll be using only pure EABI user space then you
  1482. can say N here. If this option is not selected and you attempt
  1483. to execute a legacy ABI binary then the result will be
  1484. UNPREDICTABLE (in fact it can be predicted that it won't work
  1485. at all). If in doubt say Y.
  1486. config ARCH_HAS_HOLES_MEMORYMODEL
  1487. bool
  1488. config ARCH_SPARSEMEM_ENABLE
  1489. bool
  1490. config ARCH_SPARSEMEM_DEFAULT
  1491. def_bool ARCH_SPARSEMEM_ENABLE
  1492. config ARCH_SELECT_MEMORY_MODEL
  1493. def_bool ARCH_SPARSEMEM_ENABLE
  1494. config HAVE_ARCH_PFN_VALID
  1495. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1496. config HIGHMEM
  1497. bool "High Memory Support"
  1498. depends on MMU
  1499. help
  1500. The address space of ARM processors is only 4 Gigabytes large
  1501. and it has to accommodate user address space, kernel address
  1502. space as well as some memory mapped IO. That means that, if you
  1503. have a large amount of physical memory and/or IO, not all of the
  1504. memory can be "permanently mapped" by the kernel. The physical
  1505. memory that is not permanently mapped is called "high memory".
  1506. Depending on the selected kernel/user memory split, minimum
  1507. vmalloc space and actual amount of RAM, you may not need this
  1508. option which should result in a slightly faster kernel.
  1509. If unsure, say n.
  1510. config HIGHPTE
  1511. bool "Allocate 2nd-level pagetables from highmem"
  1512. depends on HIGHMEM
  1513. config HW_PERF_EVENTS
  1514. bool "Enable hardware performance counter support for perf events"
  1515. depends on PERF_EVENTS
  1516. default y
  1517. help
  1518. Enable hardware performance counter support for perf events. If
  1519. disabled, perf events will use software events only.
  1520. source "mm/Kconfig"
  1521. config FORCE_MAX_ZONEORDER
  1522. int "Maximum zone order" if ARCH_SHMOBILE
  1523. range 11 64 if ARCH_SHMOBILE
  1524. default "12" if SOC_AM33XX
  1525. default "9" if SA1111
  1526. default "11"
  1527. help
  1528. The kernel memory allocator divides physically contiguous memory
  1529. blocks into "zones", where each zone is a power of two number of
  1530. pages. This option selects the largest power of two that the kernel
  1531. keeps in the memory allocator. If you need to allocate very large
  1532. blocks of physically contiguous memory, then you may need to
  1533. increase this value.
  1534. This config option is actually maximum order plus one. For example,
  1535. a value of 11 means that the largest free memory block is 2^10 pages.
  1536. config ALIGNMENT_TRAP
  1537. bool
  1538. depends on CPU_CP15_MMU
  1539. default y if !ARCH_EBSA110
  1540. select HAVE_PROC_CPU if PROC_FS
  1541. help
  1542. ARM processors cannot fetch/store information which is not
  1543. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1544. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1545. fetch/store instructions will be emulated in software if you say
  1546. here, which has a severe performance impact. This is necessary for
  1547. correct operation of some network protocols. With an IP-only
  1548. configuration it is safe to say N, otherwise say Y.
  1549. config UACCESS_WITH_MEMCPY
  1550. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1551. depends on MMU
  1552. default y if CPU_FEROCEON
  1553. help
  1554. Implement faster copy_to_user and clear_user methods for CPU
  1555. cores where a 8-word STM instruction give significantly higher
  1556. memory write throughput than a sequence of individual 32bit stores.
  1557. A possible side effect is a slight increase in scheduling latency
  1558. between threads sharing the same address space if they invoke
  1559. such copy operations with large buffers.
  1560. However, if the CPU data cache is using a write-allocate mode,
  1561. this option is unlikely to provide any performance gain.
  1562. config SECCOMP
  1563. bool
  1564. prompt "Enable seccomp to safely compute untrusted bytecode"
  1565. ---help---
  1566. This kernel feature is useful for number crunching applications
  1567. that may need to compute untrusted bytecode during their
  1568. execution. By using pipes or other transports made available to
  1569. the process as file descriptors supporting the read/write
  1570. syscalls, it's possible to isolate those applications in
  1571. their own address space using seccomp. Once seccomp is
  1572. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1573. and the task is only allowed to execute a few safe syscalls
  1574. defined by each seccomp mode.
  1575. config CC_STACKPROTECTOR
  1576. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1577. depends on EXPERIMENTAL
  1578. help
  1579. This option turns on the -fstack-protector GCC feature. This
  1580. feature puts, at the beginning of functions, a canary value on
  1581. the stack just before the return address, and validates
  1582. the value just before actually returning. Stack based buffer
  1583. overflows (that need to overwrite this return address) now also
  1584. overwrite the canary, which gets detected and the attack is then
  1585. neutralized via a kernel panic.
  1586. This feature requires gcc version 4.2 or above.
  1587. config XEN_DOM0
  1588. def_bool y
  1589. depends on XEN
  1590. config XEN
  1591. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1592. depends on EXPERIMENTAL && ARM && OF
  1593. depends on CPU_V7 && !CPU_V6
  1594. help
  1595. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1596. endmenu
  1597. menu "Boot options"
  1598. config USE_OF
  1599. bool "Flattened Device Tree support"
  1600. select IRQ_DOMAIN
  1601. select OF
  1602. select OF_EARLY_FLATTREE
  1603. help
  1604. Include support for flattened device tree machine descriptions.
  1605. config ATAGS
  1606. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1607. default y
  1608. help
  1609. This is the traditional way of passing data to the kernel at boot
  1610. time. If you are solely relying on the flattened device tree (or
  1611. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1612. to remove ATAGS support from your kernel binary. If unsure,
  1613. leave this to y.
  1614. config DEPRECATED_PARAM_STRUCT
  1615. bool "Provide old way to pass kernel parameters"
  1616. depends on ATAGS
  1617. help
  1618. This was deprecated in 2001 and announced to live on for 5 years.
  1619. Some old boot loaders still use this way.
  1620. # Compressed boot loader in ROM. Yes, we really want to ask about
  1621. # TEXT and BSS so we preserve their values in the config files.
  1622. config ZBOOT_ROM_TEXT
  1623. hex "Compressed ROM boot loader base address"
  1624. default "0"
  1625. help
  1626. The physical address at which the ROM-able zImage is to be
  1627. placed in the target. Platforms which normally make use of
  1628. ROM-able zImage formats normally set this to a suitable
  1629. value in their defconfig file.
  1630. If ZBOOT_ROM is not enabled, this has no effect.
  1631. config ZBOOT_ROM_BSS
  1632. hex "Compressed ROM boot loader BSS address"
  1633. default "0"
  1634. help
  1635. The base address of an area of read/write memory in the target
  1636. for the ROM-able zImage which must be available while the
  1637. decompressor is running. It must be large enough to hold the
  1638. entire decompressed kernel plus an additional 128 KiB.
  1639. Platforms which normally make use of ROM-able zImage formats
  1640. normally set this to a suitable value in their defconfig file.
  1641. If ZBOOT_ROM is not enabled, this has no effect.
  1642. config ZBOOT_ROM
  1643. bool "Compressed boot loader in ROM/flash"
  1644. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1645. help
  1646. Say Y here if you intend to execute your compressed kernel image
  1647. (zImage) directly from ROM or flash. If unsure, say N.
  1648. choice
  1649. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1650. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1651. default ZBOOT_ROM_NONE
  1652. help
  1653. Include experimental SD/MMC loading code in the ROM-able zImage.
  1654. With this enabled it is possible to write the ROM-able zImage
  1655. kernel image to an MMC or SD card and boot the kernel straight
  1656. from the reset vector. At reset the processor Mask ROM will load
  1657. the first part of the ROM-able zImage which in turn loads the
  1658. rest the kernel image to RAM.
  1659. config ZBOOT_ROM_NONE
  1660. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1661. help
  1662. Do not load image from SD or MMC
  1663. config ZBOOT_ROM_MMCIF
  1664. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1665. help
  1666. Load image from MMCIF hardware block.
  1667. config ZBOOT_ROM_SH_MOBILE_SDHI
  1668. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1669. help
  1670. Load image from SDHI hardware block
  1671. endchoice
  1672. config ARM_APPENDED_DTB
  1673. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1674. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1675. help
  1676. With this option, the boot code will look for a device tree binary
  1677. (DTB) appended to zImage
  1678. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1679. This is meant as a backward compatibility convenience for those
  1680. systems with a bootloader that can't be upgraded to accommodate
  1681. the documented boot protocol using a device tree.
  1682. Beware that there is very little in terms of protection against
  1683. this option being confused by leftover garbage in memory that might
  1684. look like a DTB header after a reboot if no actual DTB is appended
  1685. to zImage. Do not leave this option active in a production kernel
  1686. if you don't intend to always append a DTB. Proper passing of the
  1687. location into r2 of a bootloader provided DTB is always preferable
  1688. to this option.
  1689. config ARM_ATAG_DTB_COMPAT
  1690. bool "Supplement the appended DTB with traditional ATAG information"
  1691. depends on ARM_APPENDED_DTB
  1692. help
  1693. Some old bootloaders can't be updated to a DTB capable one, yet
  1694. they provide ATAGs with memory configuration, the ramdisk address,
  1695. the kernel cmdline string, etc. Such information is dynamically
  1696. provided by the bootloader and can't always be stored in a static
  1697. DTB. To allow a device tree enabled kernel to be used with such
  1698. bootloaders, this option allows zImage to extract the information
  1699. from the ATAG list and store it at run time into the appended DTB.
  1700. choice
  1701. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1702. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1703. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1704. bool "Use bootloader kernel arguments if available"
  1705. help
  1706. Uses the command-line options passed by the boot loader instead of
  1707. the device tree bootargs property. If the boot loader doesn't provide
  1708. any, the device tree bootargs property will be used.
  1709. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1710. bool "Extend with bootloader kernel arguments"
  1711. help
  1712. The command-line arguments provided by the boot loader will be
  1713. appended to the the device tree bootargs property.
  1714. endchoice
  1715. config CMDLINE
  1716. string "Default kernel command string"
  1717. default ""
  1718. help
  1719. On some architectures (EBSA110 and CATS), there is currently no way
  1720. for the boot loader to pass arguments to the kernel. For these
  1721. architectures, you should supply some command-line options at build
  1722. time by entering them here. As a minimum, you should specify the
  1723. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1724. choice
  1725. prompt "Kernel command line type" if CMDLINE != ""
  1726. default CMDLINE_FROM_BOOTLOADER
  1727. depends on ATAGS
  1728. config CMDLINE_FROM_BOOTLOADER
  1729. bool "Use bootloader kernel arguments if available"
  1730. help
  1731. Uses the command-line options passed by the boot loader. If
  1732. the boot loader doesn't provide any, the default kernel command
  1733. string provided in CMDLINE will be used.
  1734. config CMDLINE_EXTEND
  1735. bool "Extend bootloader kernel arguments"
  1736. help
  1737. The command-line arguments provided by the boot loader will be
  1738. appended to the default kernel command string.
  1739. config CMDLINE_FORCE
  1740. bool "Always use the default kernel command string"
  1741. help
  1742. Always use the default kernel command string, even if the boot
  1743. loader passes other arguments to the kernel.
  1744. This is useful if you cannot or don't want to change the
  1745. command-line options your boot loader passes to the kernel.
  1746. endchoice
  1747. config XIP_KERNEL
  1748. bool "Kernel Execute-In-Place from ROM"
  1749. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1750. help
  1751. Execute-In-Place allows the kernel to run from non-volatile storage
  1752. directly addressable by the CPU, such as NOR flash. This saves RAM
  1753. space since the text section of the kernel is not loaded from flash
  1754. to RAM. Read-write sections, such as the data section and stack,
  1755. are still copied to RAM. The XIP kernel is not compressed since
  1756. it has to run directly from flash, so it will take more space to
  1757. store it. The flash address used to link the kernel object files,
  1758. and for storing it, is configuration dependent. Therefore, if you
  1759. say Y here, you must know the proper physical address where to
  1760. store the kernel image depending on your own flash memory usage.
  1761. Also note that the make target becomes "make xipImage" rather than
  1762. "make zImage" or "make Image". The final kernel binary to put in
  1763. ROM memory will be arch/arm/boot/xipImage.
  1764. If unsure, say N.
  1765. config XIP_PHYS_ADDR
  1766. hex "XIP Kernel Physical Location"
  1767. depends on XIP_KERNEL
  1768. default "0x00080000"
  1769. help
  1770. This is the physical address in your flash memory the kernel will
  1771. be linked for and stored to. This address is dependent on your
  1772. own flash usage.
  1773. config KEXEC
  1774. bool "Kexec system call (EXPERIMENTAL)"
  1775. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1776. help
  1777. kexec is a system call that implements the ability to shutdown your
  1778. current kernel, and to start another kernel. It is like a reboot
  1779. but it is independent of the system firmware. And like a reboot
  1780. you can start any kernel with it, not just Linux.
  1781. It is an ongoing process to be certain the hardware in a machine
  1782. is properly shutdown, so do not be surprised if this code does not
  1783. initially work for you. It may help to enable device hotplugging
  1784. support.
  1785. config ATAGS_PROC
  1786. bool "Export atags in procfs"
  1787. depends on ATAGS && KEXEC
  1788. default y
  1789. help
  1790. Should the atags used to boot the kernel be exported in an "atags"
  1791. file in procfs. Useful with kexec.
  1792. config CRASH_DUMP
  1793. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1794. depends on EXPERIMENTAL
  1795. help
  1796. Generate crash dump after being started by kexec. This should
  1797. be normally only set in special crash dump kernels which are
  1798. loaded in the main kernel with kexec-tools into a specially
  1799. reserved region and then later executed after a crash by
  1800. kdump/kexec. The crash dump kernel must be compiled to a
  1801. memory address not used by the main kernel
  1802. For more details see Documentation/kdump/kdump.txt
  1803. config AUTO_ZRELADDR
  1804. bool "Auto calculation of the decompressed kernel image address"
  1805. depends on !ZBOOT_ROM && !ARCH_U300
  1806. help
  1807. ZRELADDR is the physical address where the decompressed kernel
  1808. image will be placed. If AUTO_ZRELADDR is selected, the address
  1809. will be determined at run-time by masking the current IP with
  1810. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1811. from start of memory.
  1812. endmenu
  1813. menu "CPU Power Management"
  1814. if ARCH_HAS_CPUFREQ
  1815. source "drivers/cpufreq/Kconfig"
  1816. config CPU_FREQ_IMX
  1817. tristate "CPUfreq driver for i.MX CPUs"
  1818. depends on ARCH_MXC && CPU_FREQ
  1819. select CPU_FREQ_TABLE
  1820. help
  1821. This enables the CPUfreq driver for i.MX CPUs.
  1822. config CPU_FREQ_SA1100
  1823. bool
  1824. config CPU_FREQ_SA1110
  1825. bool
  1826. config CPU_FREQ_INTEGRATOR
  1827. tristate "CPUfreq driver for ARM Integrator CPUs"
  1828. depends on ARCH_INTEGRATOR && CPU_FREQ
  1829. default y
  1830. help
  1831. This enables the CPUfreq driver for ARM Integrator CPUs.
  1832. For details, take a look at <file:Documentation/cpu-freq>.
  1833. If in doubt, say Y.
  1834. config CPU_FREQ_PXA
  1835. bool
  1836. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1837. default y
  1838. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1839. select CPU_FREQ_TABLE
  1840. config CPU_FREQ_S3C
  1841. bool
  1842. help
  1843. Internal configuration node for common cpufreq on Samsung SoC
  1844. config CPU_FREQ_S3C24XX
  1845. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1846. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1847. select CPU_FREQ_S3C
  1848. help
  1849. This enables the CPUfreq driver for the Samsung S3C24XX family
  1850. of CPUs.
  1851. For details, take a look at <file:Documentation/cpu-freq>.
  1852. If in doubt, say N.
  1853. config CPU_FREQ_S3C24XX_PLL
  1854. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1855. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1856. help
  1857. Compile in support for changing the PLL frequency from the
  1858. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1859. after a frequency change, so by default it is not enabled.
  1860. This also means that the PLL tables for the selected CPU(s) will
  1861. be built which may increase the size of the kernel image.
  1862. config CPU_FREQ_S3C24XX_DEBUG
  1863. bool "Debug CPUfreq Samsung driver core"
  1864. depends on CPU_FREQ_S3C24XX
  1865. help
  1866. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1867. config CPU_FREQ_S3C24XX_IODEBUG
  1868. bool "Debug CPUfreq Samsung driver IO timing"
  1869. depends on CPU_FREQ_S3C24XX
  1870. help
  1871. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1872. config CPU_FREQ_S3C24XX_DEBUGFS
  1873. bool "Export debugfs for CPUFreq"
  1874. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1875. help
  1876. Export status information via debugfs.
  1877. endif
  1878. source "drivers/cpuidle/Kconfig"
  1879. endmenu
  1880. menu "Floating point emulation"
  1881. comment "At least one emulation must be selected"
  1882. config FPE_NWFPE
  1883. bool "NWFPE math emulation"
  1884. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1885. ---help---
  1886. Say Y to include the NWFPE floating point emulator in the kernel.
  1887. This is necessary to run most binaries. Linux does not currently
  1888. support floating point hardware so you need to say Y here even if
  1889. your machine has an FPA or floating point co-processor podule.
  1890. You may say N here if you are going to load the Acorn FPEmulator
  1891. early in the bootup.
  1892. config FPE_NWFPE_XP
  1893. bool "Support extended precision"
  1894. depends on FPE_NWFPE
  1895. help
  1896. Say Y to include 80-bit support in the kernel floating-point
  1897. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1898. Note that gcc does not generate 80-bit operations by default,
  1899. so in most cases this option only enlarges the size of the
  1900. floating point emulator without any good reason.
  1901. You almost surely want to say N here.
  1902. config FPE_FASTFPE
  1903. bool "FastFPE math emulation (EXPERIMENTAL)"
  1904. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1905. ---help---
  1906. Say Y here to include the FAST floating point emulator in the kernel.
  1907. This is an experimental much faster emulator which now also has full
  1908. precision for the mantissa. It does not support any exceptions.
  1909. It is very simple, and approximately 3-6 times faster than NWFPE.
  1910. It should be sufficient for most programs. It may be not suitable
  1911. for scientific calculations, but you have to check this for yourself.
  1912. If you do not feel you need a faster FP emulation you should better
  1913. choose NWFPE.
  1914. config VFP
  1915. bool "VFP-format floating point maths"
  1916. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1917. help
  1918. Say Y to include VFP support code in the kernel. This is needed
  1919. if your hardware includes a VFP unit.
  1920. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1921. release notes and additional status information.
  1922. Say N if your target does not have VFP hardware.
  1923. config VFPv3
  1924. bool
  1925. depends on VFP
  1926. default y if CPU_V7
  1927. config NEON
  1928. bool "Advanced SIMD (NEON) Extension support"
  1929. depends on VFPv3 && CPU_V7
  1930. help
  1931. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1932. Extension.
  1933. endmenu
  1934. menu "Userspace binary formats"
  1935. source "fs/Kconfig.binfmt"
  1936. config ARTHUR
  1937. tristate "RISC OS personality"
  1938. depends on !AEABI
  1939. help
  1940. Say Y here to include the kernel code necessary if you want to run
  1941. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1942. experimental; if this sounds frightening, say N and sleep in peace.
  1943. You can also say M here to compile this support as a module (which
  1944. will be called arthur).
  1945. endmenu
  1946. menu "Power management options"
  1947. source "kernel/power/Kconfig"
  1948. config ARCH_SUSPEND_POSSIBLE
  1949. depends on !ARCH_S5PC100
  1950. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1951. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1952. def_bool y
  1953. config ARM_CPU_SUSPEND
  1954. def_bool PM_SLEEP
  1955. endmenu
  1956. source "net/Kconfig"
  1957. source "drivers/Kconfig"
  1958. source "fs/Kconfig"
  1959. source "arch/arm/Kconfig.debug"
  1960. source "security/Kconfig"
  1961. source "crypto/Kconfig"
  1962. source "lib/Kconfig"