Kconfig 64 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE if PCI || ISA || PCMCIA
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  13. select HAVE_ARCH_KGDB
  14. select HAVE_ARCH_TRACEHOOK
  15. select HAVE_KPROBES if !XIP_KERNEL
  16. select HAVE_KRETPROBES if (HAVE_KPROBES)
  17. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  18. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  19. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  20. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  21. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  22. select HAVE_GENERIC_DMA_COHERENT
  23. select HAVE_KERNEL_GZIP
  24. select HAVE_KERNEL_LZO
  25. select HAVE_KERNEL_LZMA
  26. select HAVE_KERNEL_XZ
  27. select HAVE_IRQ_WORK
  28. select HAVE_PERF_EVENTS
  29. select PERF_USE_VMALLOC
  30. select HAVE_REGS_AND_STACK_ACCESS_API
  31. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  32. select HAVE_C_RECORDMCOUNT
  33. select HAVE_GENERIC_HARDIRQS
  34. select HARDIRQS_SW_RESEND
  35. select GENERIC_IRQ_PROBE
  36. select GENERIC_IRQ_SHOW
  37. select GENERIC_IRQ_PROBE
  38. select HARDIRQS_SW_RESEND
  39. select CPU_PM if (SUSPEND || CPU_IDLE)
  40. select GENERIC_PCI_IOMAP
  41. select HAVE_BPF_JIT
  42. select GENERIC_SMP_IDLE_THREAD
  43. select KTIME_SCALAR
  44. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  45. help
  46. The ARM series is a line of low-power-consumption RISC chip designs
  47. licensed by ARM Ltd and targeted at embedded applications and
  48. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  49. manufactured, but legacy ARM-based PC hardware remains popular in
  50. Europe. There is an ARM Linux project with a web page at
  51. <http://www.arm.linux.org.uk/>.
  52. config ARM_HAS_SG_CHAIN
  53. bool
  54. config HAVE_PWM
  55. bool
  56. config MIGHT_HAVE_PCI
  57. bool
  58. config SYS_SUPPORTS_APM_EMULATION
  59. bool
  60. config GENERIC_GPIO
  61. bool
  62. config HAVE_TCM
  63. bool
  64. select GENERIC_ALLOCATOR
  65. config HAVE_PROC_CPU
  66. bool
  67. config NO_IOPORT
  68. bool
  69. config EISA
  70. bool
  71. ---help---
  72. The Extended Industry Standard Architecture (EISA) bus was
  73. developed as an open alternative to the IBM MicroChannel bus.
  74. The EISA bus provided some of the features of the IBM MicroChannel
  75. bus while maintaining backward compatibility with cards made for
  76. the older ISA bus. The EISA bus saw limited use between 1988 and
  77. 1995 when it was made obsolete by the PCI bus.
  78. Say Y here if you are building a kernel for an EISA-based machine.
  79. Otherwise, say N.
  80. config SBUS
  81. bool
  82. config STACKTRACE_SUPPORT
  83. bool
  84. default y
  85. config HAVE_LATENCYTOP_SUPPORT
  86. bool
  87. depends on !SMP
  88. default y
  89. config LOCKDEP_SUPPORT
  90. bool
  91. default y
  92. config TRACE_IRQFLAGS_SUPPORT
  93. bool
  94. default y
  95. config GENERIC_LOCKBREAK
  96. bool
  97. default y
  98. depends on SMP && PREEMPT
  99. config RWSEM_GENERIC_SPINLOCK
  100. bool
  101. default y
  102. config RWSEM_XCHGADD_ALGORITHM
  103. bool
  104. config ARCH_HAS_ILOG2_U32
  105. bool
  106. config ARCH_HAS_ILOG2_U64
  107. bool
  108. config ARCH_HAS_CPUFREQ
  109. bool
  110. help
  111. Internal node to signify that the ARCH has CPUFREQ support
  112. and that the relevant menu configurations are displayed for
  113. it.
  114. config GENERIC_HWEIGHT
  115. bool
  116. default y
  117. config GENERIC_CALIBRATE_DELAY
  118. bool
  119. default y
  120. config ARCH_MAY_HAVE_PC_FDC
  121. bool
  122. config ZONE_DMA
  123. bool
  124. config NEED_DMA_MAP_STATE
  125. def_bool y
  126. config ARCH_HAS_DMA_SET_COHERENT_MASK
  127. bool
  128. config GENERIC_ISA_DMA
  129. bool
  130. config FIQ
  131. bool
  132. config NEED_RET_TO_USER
  133. bool
  134. config ARCH_MTD_XIP
  135. bool
  136. config VECTORS_BASE
  137. hex
  138. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  139. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  140. default 0x00000000
  141. help
  142. The base address of exception vectors.
  143. config ARM_PATCH_PHYS_VIRT
  144. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  145. default y
  146. depends on !XIP_KERNEL && MMU
  147. depends on !ARCH_REALVIEW || !SPARSEMEM
  148. help
  149. Patch phys-to-virt and virt-to-phys translation functions at
  150. boot and module load time according to the position of the
  151. kernel in system memory.
  152. This can only be used with non-XIP MMU kernels where the base
  153. of physical memory is at a 16MB boundary.
  154. Only disable this option if you know that you do not require
  155. this feature (eg, building a kernel for a single machine) and
  156. you need to shrink the kernel to the minimal size.
  157. config NEED_MACH_IO_H
  158. bool
  159. help
  160. Select this when mach/io.h is required to provide special
  161. definitions for this platform. The need for mach/io.h should
  162. be avoided when possible.
  163. config NEED_MACH_MEMORY_H
  164. bool
  165. help
  166. Select this when mach/memory.h is required to provide special
  167. definitions for this platform. The need for mach/memory.h should
  168. be avoided when possible.
  169. config PHYS_OFFSET
  170. hex "Physical address of main memory" if MMU
  171. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  172. default DRAM_BASE if !MMU
  173. help
  174. Please provide the physical address corresponding to the
  175. location of main memory in your system.
  176. config GENERIC_BUG
  177. def_bool y
  178. depends on BUG
  179. source "init/Kconfig"
  180. source "kernel/Kconfig.freezer"
  181. menu "System Type"
  182. config MMU
  183. bool "MMU-based Paged Memory Management Support"
  184. default y
  185. help
  186. Select if you want MMU-based virtualised addressing space
  187. support by paged memory management. If unsure, say 'Y'.
  188. #
  189. # The "ARM system type" choice list is ordered alphabetically by option
  190. # text. Please add new entries in the option alphabetic order.
  191. #
  192. choice
  193. prompt "ARM system type"
  194. default ARCH_VERSATILE
  195. config ARCH_INTEGRATOR
  196. bool "ARM Ltd. Integrator family"
  197. select ARM_AMBA
  198. select ARCH_HAS_CPUFREQ
  199. select CLKDEV_LOOKUP
  200. select HAVE_MACH_CLKDEV
  201. select HAVE_TCM
  202. select ICST
  203. select GENERIC_CLOCKEVENTS
  204. select PLAT_VERSATILE
  205. select PLAT_VERSATILE_FPGA_IRQ
  206. select NEED_MACH_IO_H
  207. select NEED_MACH_MEMORY_H
  208. select SPARSE_IRQ
  209. select MULTI_IRQ_HANDLER
  210. help
  211. Support for ARM's Integrator platform.
  212. config ARCH_REALVIEW
  213. bool "ARM Ltd. RealView family"
  214. select ARM_AMBA
  215. select CLKDEV_LOOKUP
  216. select HAVE_MACH_CLKDEV
  217. select ICST
  218. select GENERIC_CLOCKEVENTS
  219. select ARCH_WANT_OPTIONAL_GPIOLIB
  220. select PLAT_VERSATILE
  221. select PLAT_VERSATILE_CLCD
  222. select ARM_TIMER_SP804
  223. select GPIO_PL061 if GPIOLIB
  224. select NEED_MACH_MEMORY_H
  225. help
  226. This enables support for ARM Ltd RealView boards.
  227. config ARCH_VERSATILE
  228. bool "ARM Ltd. Versatile family"
  229. select ARM_AMBA
  230. select ARM_VIC
  231. select CLKDEV_LOOKUP
  232. select HAVE_MACH_CLKDEV
  233. select ICST
  234. select GENERIC_CLOCKEVENTS
  235. select ARCH_WANT_OPTIONAL_GPIOLIB
  236. select PLAT_VERSATILE
  237. select PLAT_VERSATILE_CLCD
  238. select PLAT_VERSATILE_FPGA_IRQ
  239. select ARM_TIMER_SP804
  240. help
  241. This enables support for ARM Ltd Versatile board.
  242. config ARCH_VEXPRESS
  243. bool "ARM Ltd. Versatile Express family"
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select ARM_AMBA
  246. select ARM_TIMER_SP804
  247. select CLKDEV_LOOKUP
  248. select HAVE_MACH_CLKDEV
  249. select GENERIC_CLOCKEVENTS
  250. select HAVE_CLK
  251. select HAVE_PATA_PLATFORM
  252. select ICST
  253. select NO_IOPORT
  254. select PLAT_VERSATILE
  255. select PLAT_VERSATILE_CLCD
  256. help
  257. This enables support for the ARM Ltd Versatile Express boards.
  258. config ARCH_AT91
  259. bool "Atmel AT91"
  260. select ARCH_REQUIRE_GPIOLIB
  261. select HAVE_CLK
  262. select CLKDEV_LOOKUP
  263. select IRQ_DOMAIN
  264. select NEED_MACH_IO_H if PCCARD
  265. help
  266. This enables support for systems based on Atmel
  267. AT91RM9200 and AT91SAM9* processors.
  268. config ARCH_BCMRING
  269. bool "Broadcom BCMRING"
  270. depends on MMU
  271. select CPU_V6
  272. select ARM_AMBA
  273. select ARM_TIMER_SP804
  274. select CLKDEV_LOOKUP
  275. select GENERIC_CLOCKEVENTS
  276. select ARCH_WANT_OPTIONAL_GPIOLIB
  277. help
  278. Support for Broadcom's BCMRing platform.
  279. config ARCH_HIGHBANK
  280. bool "Calxeda Highbank-based"
  281. select ARCH_WANT_OPTIONAL_GPIOLIB
  282. select ARM_AMBA
  283. select ARM_GIC
  284. select ARM_TIMER_SP804
  285. select CACHE_L2X0
  286. select CLKDEV_LOOKUP
  287. select CPU_V7
  288. select GENERIC_CLOCKEVENTS
  289. select HAVE_ARM_SCU
  290. select HAVE_SMP
  291. select SPARSE_IRQ
  292. select USE_OF
  293. help
  294. Support for the Calxeda Highbank SoC based boards.
  295. config ARCH_CLPS711X
  296. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  297. select CPU_ARM720T
  298. select ARCH_USES_GETTIMEOFFSET
  299. select NEED_MACH_MEMORY_H
  300. help
  301. Support for Cirrus Logic 711x/721x/731x based boards.
  302. config ARCH_CNS3XXX
  303. bool "Cavium Networks CNS3XXX family"
  304. select CPU_V6K
  305. select GENERIC_CLOCKEVENTS
  306. select ARM_GIC
  307. select MIGHT_HAVE_CACHE_L2X0
  308. select MIGHT_HAVE_PCI
  309. select PCI_DOMAINS if PCI
  310. help
  311. Support for Cavium Networks CNS3XXX platform.
  312. config ARCH_GEMINI
  313. bool "Cortina Systems Gemini"
  314. select CPU_FA526
  315. select ARCH_REQUIRE_GPIOLIB
  316. select ARCH_USES_GETTIMEOFFSET
  317. help
  318. Support for the Cortina Systems Gemini family SoCs
  319. config ARCH_PRIMA2
  320. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  321. select CPU_V7
  322. select NO_IOPORT
  323. select GENERIC_CLOCKEVENTS
  324. select CLKDEV_LOOKUP
  325. select GENERIC_IRQ_CHIP
  326. select MIGHT_HAVE_CACHE_L2X0
  327. select PINCTRL
  328. select PINCTRL_SIRF
  329. select USE_OF
  330. select ZONE_DMA
  331. help
  332. Support for CSR SiRFSoC ARM Cortex A9 Platform
  333. config ARCH_EBSA110
  334. bool "EBSA-110"
  335. select CPU_SA110
  336. select ISA
  337. select NO_IOPORT
  338. select ARCH_USES_GETTIMEOFFSET
  339. select NEED_MACH_IO_H
  340. select NEED_MACH_MEMORY_H
  341. help
  342. This is an evaluation board for the StrongARM processor available
  343. from Digital. It has limited hardware on-board, including an
  344. Ethernet interface, two PCMCIA sockets, two serial ports and a
  345. parallel port.
  346. config ARCH_EP93XX
  347. bool "EP93xx-based"
  348. select CPU_ARM920T
  349. select ARM_AMBA
  350. select ARM_VIC
  351. select CLKDEV_LOOKUP
  352. select ARCH_REQUIRE_GPIOLIB
  353. select ARCH_HAS_HOLES_MEMORYMODEL
  354. select ARCH_USES_GETTIMEOFFSET
  355. select NEED_MACH_MEMORY_H
  356. help
  357. This enables support for the Cirrus EP93xx series of CPUs.
  358. config ARCH_FOOTBRIDGE
  359. bool "FootBridge"
  360. select CPU_SA110
  361. select FOOTBRIDGE
  362. select GENERIC_CLOCKEVENTS
  363. select HAVE_IDE
  364. select NEED_MACH_IO_H
  365. select NEED_MACH_MEMORY_H
  366. help
  367. Support for systems based on the DC21285 companion chip
  368. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  369. config ARCH_MXC
  370. bool "Freescale MXC/iMX-based"
  371. select GENERIC_CLOCKEVENTS
  372. select ARCH_REQUIRE_GPIOLIB
  373. select CLKDEV_LOOKUP
  374. select CLKSRC_MMIO
  375. select GENERIC_IRQ_CHIP
  376. select MULTI_IRQ_HANDLER
  377. help
  378. Support for Freescale MXC/iMX-based family of processors
  379. config ARCH_MXS
  380. bool "Freescale MXS-based"
  381. select GENERIC_CLOCKEVENTS
  382. select ARCH_REQUIRE_GPIOLIB
  383. select CLKDEV_LOOKUP
  384. select CLKSRC_MMIO
  385. select HAVE_CLK_PREPARE
  386. select PINCTRL
  387. help
  388. Support for Freescale MXS-based family of processors
  389. config ARCH_NETX
  390. bool "Hilscher NetX based"
  391. select CLKSRC_MMIO
  392. select CPU_ARM926T
  393. select ARM_VIC
  394. select GENERIC_CLOCKEVENTS
  395. help
  396. This enables support for systems based on the Hilscher NetX Soc
  397. config ARCH_H720X
  398. bool "Hynix HMS720x-based"
  399. select CPU_ARM720T
  400. select ISA_DMA_API
  401. select ARCH_USES_GETTIMEOFFSET
  402. help
  403. This enables support for systems based on the Hynix HMS720x
  404. config ARCH_IOP13XX
  405. bool "IOP13xx-based"
  406. depends on MMU
  407. select CPU_XSC3
  408. select PLAT_IOP
  409. select PCI
  410. select ARCH_SUPPORTS_MSI
  411. select VMSPLIT_1G
  412. select NEED_MACH_IO_H
  413. select NEED_MACH_MEMORY_H
  414. select NEED_RET_TO_USER
  415. help
  416. Support for Intel's IOP13XX (XScale) family of processors.
  417. config ARCH_IOP32X
  418. bool "IOP32x-based"
  419. depends on MMU
  420. select CPU_XSCALE
  421. select NEED_MACH_IO_H
  422. select NEED_RET_TO_USER
  423. select PLAT_IOP
  424. select PCI
  425. select ARCH_REQUIRE_GPIOLIB
  426. help
  427. Support for Intel's 80219 and IOP32X (XScale) family of
  428. processors.
  429. config ARCH_IOP33X
  430. bool "IOP33x-based"
  431. depends on MMU
  432. select CPU_XSCALE
  433. select NEED_MACH_IO_H
  434. select NEED_RET_TO_USER
  435. select PLAT_IOP
  436. select PCI
  437. select ARCH_REQUIRE_GPIOLIB
  438. help
  439. Support for Intel's IOP33X (XScale) family of processors.
  440. config ARCH_IXP4XX
  441. bool "IXP4xx-based"
  442. depends on MMU
  443. select ARCH_HAS_DMA_SET_COHERENT_MASK
  444. select CLKSRC_MMIO
  445. select CPU_XSCALE
  446. select GENERIC_GPIO
  447. select GENERIC_CLOCKEVENTS
  448. select MIGHT_HAVE_PCI
  449. select NEED_MACH_IO_H
  450. select DMABOUNCE if PCI
  451. help
  452. Support for Intel's IXP4XX (XScale) family of processors.
  453. config ARCH_DOVE
  454. bool "Marvell Dove"
  455. select CPU_V7
  456. select PCI
  457. select ARCH_REQUIRE_GPIOLIB
  458. select GENERIC_CLOCKEVENTS
  459. select NEED_MACH_IO_H
  460. select PLAT_ORION
  461. help
  462. Support for the Marvell Dove SoC 88AP510
  463. config ARCH_KIRKWOOD
  464. bool "Marvell Kirkwood"
  465. select CPU_FEROCEON
  466. select PCI
  467. select ARCH_REQUIRE_GPIOLIB
  468. select GENERIC_CLOCKEVENTS
  469. select NEED_MACH_IO_H
  470. select PLAT_ORION
  471. help
  472. Support for the following Marvell Kirkwood series SoCs:
  473. 88F6180, 88F6192 and 88F6281.
  474. config ARCH_LPC32XX
  475. bool "NXP LPC32XX"
  476. select CLKSRC_MMIO
  477. select CPU_ARM926T
  478. select ARCH_REQUIRE_GPIOLIB
  479. select HAVE_IDE
  480. select ARM_AMBA
  481. select USB_ARCH_HAS_OHCI
  482. select CLKDEV_LOOKUP
  483. select GENERIC_CLOCKEVENTS
  484. select USE_OF
  485. help
  486. Support for the NXP LPC32XX family of processors
  487. config ARCH_MV78XX0
  488. bool "Marvell MV78xx0"
  489. select CPU_FEROCEON
  490. select PCI
  491. select ARCH_REQUIRE_GPIOLIB
  492. select GENERIC_CLOCKEVENTS
  493. select NEED_MACH_IO_H
  494. select PLAT_ORION
  495. help
  496. Support for the following Marvell MV78xx0 series SoCs:
  497. MV781x0, MV782x0.
  498. config ARCH_ORION5X
  499. bool "Marvell Orion"
  500. depends on MMU
  501. select CPU_FEROCEON
  502. select PCI
  503. select ARCH_REQUIRE_GPIOLIB
  504. select GENERIC_CLOCKEVENTS
  505. select PLAT_ORION
  506. help
  507. Support for the following Marvell Orion 5x series SoCs:
  508. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  509. Orion-2 (5281), Orion-1-90 (6183).
  510. config ARCH_MMP
  511. bool "Marvell PXA168/910/MMP2"
  512. depends on MMU
  513. select ARCH_REQUIRE_GPIOLIB
  514. select CLKDEV_LOOKUP
  515. select GENERIC_CLOCKEVENTS
  516. select GPIO_PXA
  517. select IRQ_DOMAIN
  518. select PLAT_PXA
  519. select SPARSE_IRQ
  520. select GENERIC_ALLOCATOR
  521. help
  522. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  523. config ARCH_KS8695
  524. bool "Micrel/Kendin KS8695"
  525. select CPU_ARM922T
  526. select ARCH_REQUIRE_GPIOLIB
  527. select ARCH_USES_GETTIMEOFFSET
  528. select NEED_MACH_MEMORY_H
  529. help
  530. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  531. System-on-Chip devices.
  532. config ARCH_W90X900
  533. bool "Nuvoton W90X900 CPU"
  534. select CPU_ARM926T
  535. select ARCH_REQUIRE_GPIOLIB
  536. select CLKDEV_LOOKUP
  537. select CLKSRC_MMIO
  538. select GENERIC_CLOCKEVENTS
  539. help
  540. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  541. At present, the w90x900 has been renamed nuc900, regarding
  542. the ARM series product line, you can login the following
  543. link address to know more.
  544. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  545. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  546. config ARCH_TEGRA
  547. bool "NVIDIA Tegra"
  548. select CLKDEV_LOOKUP
  549. select CLKSRC_MMIO
  550. select GENERIC_CLOCKEVENTS
  551. select GENERIC_GPIO
  552. select HAVE_CLK
  553. select HAVE_SMP
  554. select MIGHT_HAVE_CACHE_L2X0
  555. select NEED_MACH_IO_H if PCI
  556. select ARCH_HAS_CPUFREQ
  557. help
  558. This enables support for NVIDIA Tegra based systems (Tegra APX,
  559. Tegra 6xx and Tegra 2 series).
  560. config ARCH_PICOXCELL
  561. bool "Picochip picoXcell"
  562. select ARCH_REQUIRE_GPIOLIB
  563. select ARM_PATCH_PHYS_VIRT
  564. select ARM_VIC
  565. select CPU_V6K
  566. select DW_APB_TIMER
  567. select GENERIC_CLOCKEVENTS
  568. select GENERIC_GPIO
  569. select HAVE_TCM
  570. select NO_IOPORT
  571. select SPARSE_IRQ
  572. select USE_OF
  573. help
  574. This enables support for systems based on the Picochip picoXcell
  575. family of Femtocell devices. The picoxcell support requires device tree
  576. for all boards.
  577. config ARCH_PNX4008
  578. bool "Philips Nexperia PNX4008 Mobile"
  579. select CPU_ARM926T
  580. select CLKDEV_LOOKUP
  581. select ARCH_USES_GETTIMEOFFSET
  582. help
  583. This enables support for Philips PNX4008 mobile platform.
  584. config ARCH_PXA
  585. bool "PXA2xx/PXA3xx-based"
  586. depends on MMU
  587. select ARCH_MTD_XIP
  588. select ARCH_HAS_CPUFREQ
  589. select CLKDEV_LOOKUP
  590. select CLKSRC_MMIO
  591. select ARCH_REQUIRE_GPIOLIB
  592. select GENERIC_CLOCKEVENTS
  593. select GPIO_PXA
  594. select PLAT_PXA
  595. select SPARSE_IRQ
  596. select AUTO_ZRELADDR
  597. select MULTI_IRQ_HANDLER
  598. select ARM_CPU_SUSPEND if PM
  599. select HAVE_IDE
  600. help
  601. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  602. config ARCH_MSM
  603. bool "Qualcomm MSM"
  604. select HAVE_CLK
  605. select GENERIC_CLOCKEVENTS
  606. select ARCH_REQUIRE_GPIOLIB
  607. select CLKDEV_LOOKUP
  608. help
  609. Support for Qualcomm MSM/QSD based systems. This runs on the
  610. apps processor of the MSM/QSD and depends on a shared memory
  611. interface to the modem processor which runs the baseband
  612. stack and controls some vital subsystems
  613. (clock and power control, etc).
  614. config ARCH_SHMOBILE
  615. bool "Renesas SH-Mobile / R-Mobile"
  616. select HAVE_CLK
  617. select CLKDEV_LOOKUP
  618. select HAVE_MACH_CLKDEV
  619. select HAVE_SMP
  620. select GENERIC_CLOCKEVENTS
  621. select MIGHT_HAVE_CACHE_L2X0
  622. select NO_IOPORT
  623. select SPARSE_IRQ
  624. select MULTI_IRQ_HANDLER
  625. select PM_GENERIC_DOMAINS if PM
  626. select NEED_MACH_MEMORY_H
  627. help
  628. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  629. config ARCH_RPC
  630. bool "RiscPC"
  631. select ARCH_ACORN
  632. select FIQ
  633. select ARCH_MAY_HAVE_PC_FDC
  634. select HAVE_PATA_PLATFORM
  635. select ISA_DMA_API
  636. select NO_IOPORT
  637. select ARCH_SPARSEMEM_ENABLE
  638. select ARCH_USES_GETTIMEOFFSET
  639. select HAVE_IDE
  640. select NEED_MACH_IO_H
  641. select NEED_MACH_MEMORY_H
  642. help
  643. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  644. CD-ROM interface, serial and parallel port, and the floppy drive.
  645. config ARCH_SA1100
  646. bool "SA1100-based"
  647. select CLKSRC_MMIO
  648. select CPU_SA1100
  649. select ISA
  650. select ARCH_SPARSEMEM_ENABLE
  651. select ARCH_MTD_XIP
  652. select ARCH_HAS_CPUFREQ
  653. select CPU_FREQ
  654. select GENERIC_CLOCKEVENTS
  655. select CLKDEV_LOOKUP
  656. select ARCH_REQUIRE_GPIOLIB
  657. select HAVE_IDE
  658. select NEED_MACH_MEMORY_H
  659. select SPARSE_IRQ
  660. help
  661. Support for StrongARM 11x0 based boards.
  662. config ARCH_S3C24XX
  663. bool "Samsung S3C24XX SoCs"
  664. select GENERIC_GPIO
  665. select ARCH_HAS_CPUFREQ
  666. select HAVE_CLK
  667. select CLKDEV_LOOKUP
  668. select ARCH_USES_GETTIMEOFFSET
  669. select HAVE_S3C2410_I2C if I2C
  670. select HAVE_S3C_RTC if RTC_CLASS
  671. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  672. select NEED_MACH_IO_H
  673. help
  674. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  675. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  676. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  677. Samsung SMDK2410 development board (and derivatives).
  678. config ARCH_S3C64XX
  679. bool "Samsung S3C64XX"
  680. select PLAT_SAMSUNG
  681. select CPU_V6
  682. select ARM_VIC
  683. select HAVE_CLK
  684. select HAVE_TCM
  685. select CLKDEV_LOOKUP
  686. select NO_IOPORT
  687. select ARCH_USES_GETTIMEOFFSET
  688. select ARCH_HAS_CPUFREQ
  689. select ARCH_REQUIRE_GPIOLIB
  690. select SAMSUNG_CLKSRC
  691. select SAMSUNG_IRQ_VIC_TIMER
  692. select S3C_GPIO_TRACK
  693. select S3C_DEV_NAND
  694. select USB_ARCH_HAS_OHCI
  695. select SAMSUNG_GPIOLIB_4BIT
  696. select HAVE_S3C2410_I2C if I2C
  697. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  698. help
  699. Samsung S3C64XX series based systems
  700. config ARCH_S5P64X0
  701. bool "Samsung S5P6440 S5P6450"
  702. select CPU_V6
  703. select GENERIC_GPIO
  704. select HAVE_CLK
  705. select CLKDEV_LOOKUP
  706. select CLKSRC_MMIO
  707. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  708. select GENERIC_CLOCKEVENTS
  709. select HAVE_S3C2410_I2C if I2C
  710. select HAVE_S3C_RTC if RTC_CLASS
  711. help
  712. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  713. SMDK6450.
  714. config ARCH_S5PC100
  715. bool "Samsung S5PC100"
  716. select GENERIC_GPIO
  717. select HAVE_CLK
  718. select CLKDEV_LOOKUP
  719. select CPU_V7
  720. select ARCH_USES_GETTIMEOFFSET
  721. select HAVE_S3C2410_I2C if I2C
  722. select HAVE_S3C_RTC if RTC_CLASS
  723. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  724. help
  725. Samsung S5PC100 series based systems
  726. config ARCH_S5PV210
  727. bool "Samsung S5PV210/S5PC110"
  728. select CPU_V7
  729. select ARCH_SPARSEMEM_ENABLE
  730. select ARCH_HAS_HOLES_MEMORYMODEL
  731. select GENERIC_GPIO
  732. select HAVE_CLK
  733. select CLKDEV_LOOKUP
  734. select CLKSRC_MMIO
  735. select ARCH_HAS_CPUFREQ
  736. select GENERIC_CLOCKEVENTS
  737. select HAVE_S3C2410_I2C if I2C
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. select NEED_MACH_MEMORY_H
  741. help
  742. Samsung S5PV210/S5PC110 series based systems
  743. config ARCH_EXYNOS
  744. bool "SAMSUNG EXYNOS"
  745. select CPU_V7
  746. select ARCH_SPARSEMEM_ENABLE
  747. select ARCH_HAS_HOLES_MEMORYMODEL
  748. select GENERIC_GPIO
  749. select HAVE_CLK
  750. select CLKDEV_LOOKUP
  751. select ARCH_HAS_CPUFREQ
  752. select GENERIC_CLOCKEVENTS
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. select HAVE_S3C2410_I2C if I2C
  755. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  756. select NEED_MACH_MEMORY_H
  757. help
  758. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  759. config ARCH_SHARK
  760. bool "Shark"
  761. select CPU_SA110
  762. select ISA
  763. select ISA_DMA
  764. select ZONE_DMA
  765. select PCI
  766. select ARCH_USES_GETTIMEOFFSET
  767. select NEED_MACH_MEMORY_H
  768. select NEED_MACH_IO_H
  769. help
  770. Support for the StrongARM based Digital DNARD machine, also known
  771. as "Shark" (<http://www.shark-linux.de/shark.html>).
  772. config ARCH_U300
  773. bool "ST-Ericsson U300 Series"
  774. depends on MMU
  775. select CLKSRC_MMIO
  776. select CPU_ARM926T
  777. select HAVE_TCM
  778. select ARM_AMBA
  779. select ARM_PATCH_PHYS_VIRT
  780. select ARM_VIC
  781. select GENERIC_CLOCKEVENTS
  782. select CLKDEV_LOOKUP
  783. select HAVE_MACH_CLKDEV
  784. select GENERIC_GPIO
  785. select ARCH_REQUIRE_GPIOLIB
  786. help
  787. Support for ST-Ericsson U300 series mobile platforms.
  788. config ARCH_U8500
  789. bool "ST-Ericsson U8500 Series"
  790. depends on MMU
  791. select CPU_V7
  792. select ARM_AMBA
  793. select GENERIC_CLOCKEVENTS
  794. select CLKDEV_LOOKUP
  795. select ARCH_REQUIRE_GPIOLIB
  796. select ARCH_HAS_CPUFREQ
  797. select HAVE_SMP
  798. select MIGHT_HAVE_CACHE_L2X0
  799. help
  800. Support for ST-Ericsson's Ux500 architecture
  801. config ARCH_NOMADIK
  802. bool "STMicroelectronics Nomadik"
  803. select ARM_AMBA
  804. select ARM_VIC
  805. select CPU_ARM926T
  806. select CLKDEV_LOOKUP
  807. select GENERIC_CLOCKEVENTS
  808. select PINCTRL
  809. select MIGHT_HAVE_CACHE_L2X0
  810. select ARCH_REQUIRE_GPIOLIB
  811. help
  812. Support for the Nomadik platform by ST-Ericsson
  813. config ARCH_DAVINCI
  814. bool "TI DaVinci"
  815. select GENERIC_CLOCKEVENTS
  816. select ARCH_REQUIRE_GPIOLIB
  817. select ZONE_DMA
  818. select HAVE_IDE
  819. select CLKDEV_LOOKUP
  820. select GENERIC_ALLOCATOR
  821. select GENERIC_IRQ_CHIP
  822. select ARCH_HAS_HOLES_MEMORYMODEL
  823. help
  824. Support for TI's DaVinci platform.
  825. config ARCH_OMAP
  826. bool "TI OMAP"
  827. select HAVE_CLK
  828. select ARCH_REQUIRE_GPIOLIB
  829. select ARCH_HAS_CPUFREQ
  830. select CLKSRC_MMIO
  831. select GENERIC_CLOCKEVENTS
  832. select ARCH_HAS_HOLES_MEMORYMODEL
  833. help
  834. Support for TI's OMAP platform (OMAP1/2/3/4).
  835. config PLAT_SPEAR
  836. bool "ST SPEAr"
  837. select ARM_AMBA
  838. select ARCH_REQUIRE_GPIOLIB
  839. select CLKDEV_LOOKUP
  840. select CLKSRC_MMIO
  841. select GENERIC_CLOCKEVENTS
  842. select HAVE_CLK
  843. help
  844. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  845. config ARCH_VT8500
  846. bool "VIA/WonderMedia 85xx"
  847. select CPU_ARM926T
  848. select GENERIC_GPIO
  849. select ARCH_HAS_CPUFREQ
  850. select GENERIC_CLOCKEVENTS
  851. select ARCH_REQUIRE_GPIOLIB
  852. select HAVE_PWM
  853. help
  854. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  855. config ARCH_ZYNQ
  856. bool "Xilinx Zynq ARM Cortex A9 Platform"
  857. select CPU_V7
  858. select GENERIC_CLOCKEVENTS
  859. select CLKDEV_LOOKUP
  860. select ARM_GIC
  861. select ARM_AMBA
  862. select ICST
  863. select MIGHT_HAVE_CACHE_L2X0
  864. select USE_OF
  865. help
  866. Support for Xilinx Zynq ARM Cortex A9 Platform
  867. endchoice
  868. #
  869. # This is sorted alphabetically by mach-* pathname. However, plat-*
  870. # Kconfigs may be included either alphabetically (according to the
  871. # plat- suffix) or along side the corresponding mach-* source.
  872. #
  873. source "arch/arm/mach-at91/Kconfig"
  874. source "arch/arm/mach-bcmring/Kconfig"
  875. source "arch/arm/mach-clps711x/Kconfig"
  876. source "arch/arm/mach-cns3xxx/Kconfig"
  877. source "arch/arm/mach-davinci/Kconfig"
  878. source "arch/arm/mach-dove/Kconfig"
  879. source "arch/arm/mach-ep93xx/Kconfig"
  880. source "arch/arm/mach-footbridge/Kconfig"
  881. source "arch/arm/mach-gemini/Kconfig"
  882. source "arch/arm/mach-h720x/Kconfig"
  883. source "arch/arm/mach-integrator/Kconfig"
  884. source "arch/arm/mach-iop32x/Kconfig"
  885. source "arch/arm/mach-iop33x/Kconfig"
  886. source "arch/arm/mach-iop13xx/Kconfig"
  887. source "arch/arm/mach-ixp4xx/Kconfig"
  888. source "arch/arm/mach-kirkwood/Kconfig"
  889. source "arch/arm/mach-ks8695/Kconfig"
  890. source "arch/arm/mach-lpc32xx/Kconfig"
  891. source "arch/arm/mach-msm/Kconfig"
  892. source "arch/arm/mach-mv78xx0/Kconfig"
  893. source "arch/arm/plat-mxc/Kconfig"
  894. source "arch/arm/mach-mxs/Kconfig"
  895. source "arch/arm/mach-netx/Kconfig"
  896. source "arch/arm/mach-nomadik/Kconfig"
  897. source "arch/arm/plat-nomadik/Kconfig"
  898. source "arch/arm/plat-omap/Kconfig"
  899. source "arch/arm/mach-omap1/Kconfig"
  900. source "arch/arm/mach-omap2/Kconfig"
  901. source "arch/arm/mach-orion5x/Kconfig"
  902. source "arch/arm/mach-pxa/Kconfig"
  903. source "arch/arm/plat-pxa/Kconfig"
  904. source "arch/arm/mach-mmp/Kconfig"
  905. source "arch/arm/mach-realview/Kconfig"
  906. source "arch/arm/mach-sa1100/Kconfig"
  907. source "arch/arm/plat-samsung/Kconfig"
  908. source "arch/arm/plat-s3c24xx/Kconfig"
  909. source "arch/arm/plat-s5p/Kconfig"
  910. source "arch/arm/plat-spear/Kconfig"
  911. source "arch/arm/mach-s3c24xx/Kconfig"
  912. if ARCH_S3C24XX
  913. source "arch/arm/mach-s3c2412/Kconfig"
  914. source "arch/arm/mach-s3c2440/Kconfig"
  915. endif
  916. if ARCH_S3C64XX
  917. source "arch/arm/mach-s3c64xx/Kconfig"
  918. endif
  919. source "arch/arm/mach-s5p64x0/Kconfig"
  920. source "arch/arm/mach-s5pc100/Kconfig"
  921. source "arch/arm/mach-s5pv210/Kconfig"
  922. source "arch/arm/mach-exynos/Kconfig"
  923. source "arch/arm/mach-shmobile/Kconfig"
  924. source "arch/arm/mach-tegra/Kconfig"
  925. source "arch/arm/mach-u300/Kconfig"
  926. source "arch/arm/mach-ux500/Kconfig"
  927. source "arch/arm/mach-versatile/Kconfig"
  928. source "arch/arm/mach-vexpress/Kconfig"
  929. source "arch/arm/plat-versatile/Kconfig"
  930. source "arch/arm/mach-vt8500/Kconfig"
  931. source "arch/arm/mach-w90x900/Kconfig"
  932. # Definitions to make life easier
  933. config ARCH_ACORN
  934. bool
  935. config PLAT_IOP
  936. bool
  937. select GENERIC_CLOCKEVENTS
  938. config PLAT_ORION
  939. bool
  940. select CLKSRC_MMIO
  941. select GENERIC_IRQ_CHIP
  942. config PLAT_PXA
  943. bool
  944. config PLAT_VERSATILE
  945. bool
  946. config ARM_TIMER_SP804
  947. bool
  948. select CLKSRC_MMIO
  949. select HAVE_SCHED_CLOCK
  950. source arch/arm/mm/Kconfig
  951. config ARM_NR_BANKS
  952. int
  953. default 16 if ARCH_EP93XX
  954. default 8
  955. config IWMMXT
  956. bool "Enable iWMMXt support"
  957. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  958. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  959. help
  960. Enable support for iWMMXt context switching at run time if
  961. running on a CPU that supports it.
  962. config XSCALE_PMU
  963. bool
  964. depends on CPU_XSCALE
  965. default y
  966. config CPU_HAS_PMU
  967. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  968. (!ARCH_OMAP3 || OMAP3_EMU)
  969. default y
  970. bool
  971. config MULTI_IRQ_HANDLER
  972. bool
  973. help
  974. Allow each machine to specify it's own IRQ handler at run time.
  975. if !MMU
  976. source "arch/arm/Kconfig-nommu"
  977. endif
  978. config ARM_ERRATA_326103
  979. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  980. depends on CPU_V6
  981. help
  982. Executing a SWP instruction to read-only memory does not set bit 11
  983. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  984. treat the access as a read, preventing a COW from occurring and
  985. causing the faulting task to livelock.
  986. config ARM_ERRATA_411920
  987. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  988. depends on CPU_V6 || CPU_V6K
  989. help
  990. Invalidation of the Instruction Cache operation can
  991. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  992. It does not affect the MPCore. This option enables the ARM Ltd.
  993. recommended workaround.
  994. config ARM_ERRATA_430973
  995. bool "ARM errata: Stale prediction on replaced interworking branch"
  996. depends on CPU_V7
  997. help
  998. This option enables the workaround for the 430973 Cortex-A8
  999. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1000. interworking branch is replaced with another code sequence at the
  1001. same virtual address, whether due to self-modifying code or virtual
  1002. to physical address re-mapping, Cortex-A8 does not recover from the
  1003. stale interworking branch prediction. This results in Cortex-A8
  1004. executing the new code sequence in the incorrect ARM or Thumb state.
  1005. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1006. and also flushes the branch target cache at every context switch.
  1007. Note that setting specific bits in the ACTLR register may not be
  1008. available in non-secure mode.
  1009. config ARM_ERRATA_458693
  1010. bool "ARM errata: Processor deadlock when a false hazard is created"
  1011. depends on CPU_V7
  1012. help
  1013. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1014. erratum. For very specific sequences of memory operations, it is
  1015. possible for a hazard condition intended for a cache line to instead
  1016. be incorrectly associated with a different cache line. This false
  1017. hazard might then cause a processor deadlock. The workaround enables
  1018. the L1 caching of the NEON accesses and disables the PLD instruction
  1019. in the ACTLR register. Note that setting specific bits in the ACTLR
  1020. register may not be available in non-secure mode.
  1021. config ARM_ERRATA_460075
  1022. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1023. depends on CPU_V7
  1024. help
  1025. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1026. erratum. Any asynchronous access to the L2 cache may encounter a
  1027. situation in which recent store transactions to the L2 cache are lost
  1028. and overwritten with stale memory contents from external memory. The
  1029. workaround disables the write-allocate mode for the L2 cache via the
  1030. ACTLR register. Note that setting specific bits in the ACTLR register
  1031. may not be available in non-secure mode.
  1032. config ARM_ERRATA_742230
  1033. bool "ARM errata: DMB operation may be faulty"
  1034. depends on CPU_V7 && SMP
  1035. help
  1036. This option enables the workaround for the 742230 Cortex-A9
  1037. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1038. between two write operations may not ensure the correct visibility
  1039. ordering of the two writes. This workaround sets a specific bit in
  1040. the diagnostic register of the Cortex-A9 which causes the DMB
  1041. instruction to behave as a DSB, ensuring the correct behaviour of
  1042. the two writes.
  1043. config ARM_ERRATA_742231
  1044. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1045. depends on CPU_V7 && SMP
  1046. help
  1047. This option enables the workaround for the 742231 Cortex-A9
  1048. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1049. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1050. accessing some data located in the same cache line, may get corrupted
  1051. data due to bad handling of the address hazard when the line gets
  1052. replaced from one of the CPUs at the same time as another CPU is
  1053. accessing it. This workaround sets specific bits in the diagnostic
  1054. register of the Cortex-A9 which reduces the linefill issuing
  1055. capabilities of the processor.
  1056. config PL310_ERRATA_588369
  1057. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1058. depends on CACHE_L2X0
  1059. help
  1060. The PL310 L2 cache controller implements three types of Clean &
  1061. Invalidate maintenance operations: by Physical Address
  1062. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1063. They are architecturally defined to behave as the execution of a
  1064. clean operation followed immediately by an invalidate operation,
  1065. both performing to the same memory location. This functionality
  1066. is not correctly implemented in PL310 as clean lines are not
  1067. invalidated as a result of these operations.
  1068. config ARM_ERRATA_720789
  1069. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1070. depends on CPU_V7
  1071. help
  1072. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1073. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1074. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1075. As a consequence of this erratum, some TLB entries which should be
  1076. invalidated are not, resulting in an incoherency in the system page
  1077. tables. The workaround changes the TLB flushing routines to invalidate
  1078. entries regardless of the ASID.
  1079. config PL310_ERRATA_727915
  1080. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1081. depends on CACHE_L2X0
  1082. help
  1083. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1084. operation (offset 0x7FC). This operation runs in background so that
  1085. PL310 can handle normal accesses while it is in progress. Under very
  1086. rare circumstances, due to this erratum, write data can be lost when
  1087. PL310 treats a cacheable write transaction during a Clean &
  1088. Invalidate by Way operation.
  1089. config ARM_ERRATA_743622
  1090. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1091. depends on CPU_V7
  1092. help
  1093. This option enables the workaround for the 743622 Cortex-A9
  1094. (r2p*) erratum. Under very rare conditions, a faulty
  1095. optimisation in the Cortex-A9 Store Buffer may lead to data
  1096. corruption. This workaround sets a specific bit in the diagnostic
  1097. register of the Cortex-A9 which disables the Store Buffer
  1098. optimisation, preventing the defect from occurring. This has no
  1099. visible impact on the overall performance or power consumption of the
  1100. processor.
  1101. config ARM_ERRATA_751472
  1102. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1103. depends on CPU_V7
  1104. help
  1105. This option enables the workaround for the 751472 Cortex-A9 (prior
  1106. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1107. completion of a following broadcasted operation if the second
  1108. operation is received by a CPU before the ICIALLUIS has completed,
  1109. potentially leading to corrupted entries in the cache or TLB.
  1110. config PL310_ERRATA_753970
  1111. bool "PL310 errata: cache sync operation may be faulty"
  1112. depends on CACHE_PL310
  1113. help
  1114. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1115. Under some condition the effect of cache sync operation on
  1116. the store buffer still remains when the operation completes.
  1117. This means that the store buffer is always asked to drain and
  1118. this prevents it from merging any further writes. The workaround
  1119. is to replace the normal offset of cache sync operation (0x730)
  1120. by another offset targeting an unmapped PL310 register 0x740.
  1121. This has the same effect as the cache sync operation: store buffer
  1122. drain and waiting for all buffers empty.
  1123. config ARM_ERRATA_754322
  1124. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1125. depends on CPU_V7
  1126. help
  1127. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1128. r3p*) erratum. A speculative memory access may cause a page table walk
  1129. which starts prior to an ASID switch but completes afterwards. This
  1130. can populate the micro-TLB with a stale entry which may be hit with
  1131. the new ASID. This workaround places two dsb instructions in the mm
  1132. switching code so that no page table walks can cross the ASID switch.
  1133. config ARM_ERRATA_754327
  1134. bool "ARM errata: no automatic Store Buffer drain"
  1135. depends on CPU_V7 && SMP
  1136. help
  1137. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1138. r2p0) erratum. The Store Buffer does not have any automatic draining
  1139. mechanism and therefore a livelock may occur if an external agent
  1140. continuously polls a memory location waiting to observe an update.
  1141. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1142. written polling loops from denying visibility of updates to memory.
  1143. config ARM_ERRATA_364296
  1144. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1145. depends on CPU_V6 && !SMP
  1146. help
  1147. This options enables the workaround for the 364296 ARM1136
  1148. r0p2 erratum (possible cache data corruption with
  1149. hit-under-miss enabled). It sets the undocumented bit 31 in
  1150. the auxiliary control register and the FI bit in the control
  1151. register, thus disabling hit-under-miss without putting the
  1152. processor into full low interrupt latency mode. ARM11MPCore
  1153. is not affected.
  1154. config ARM_ERRATA_764369
  1155. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1156. depends on CPU_V7 && SMP
  1157. help
  1158. This option enables the workaround for erratum 764369
  1159. affecting Cortex-A9 MPCore with two or more processors (all
  1160. current revisions). Under certain timing circumstances, a data
  1161. cache line maintenance operation by MVA targeting an Inner
  1162. Shareable memory region may fail to proceed up to either the
  1163. Point of Coherency or to the Point of Unification of the
  1164. system. This workaround adds a DSB instruction before the
  1165. relevant cache maintenance functions and sets a specific bit
  1166. in the diagnostic control register of the SCU.
  1167. config PL310_ERRATA_769419
  1168. bool "PL310 errata: no automatic Store Buffer drain"
  1169. depends on CACHE_L2X0
  1170. help
  1171. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1172. not automatically drain. This can cause normal, non-cacheable
  1173. writes to be retained when the memory system is idle, leading
  1174. to suboptimal I/O performance for drivers using coherent DMA.
  1175. This option adds a write barrier to the cpu_idle loop so that,
  1176. on systems with an outer cache, the store buffer is drained
  1177. explicitly.
  1178. endmenu
  1179. source "arch/arm/common/Kconfig"
  1180. menu "Bus support"
  1181. config ARM_AMBA
  1182. bool
  1183. config ISA
  1184. bool
  1185. help
  1186. Find out whether you have ISA slots on your motherboard. ISA is the
  1187. name of a bus system, i.e. the way the CPU talks to the other stuff
  1188. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1189. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1190. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1191. # Select ISA DMA controller support
  1192. config ISA_DMA
  1193. bool
  1194. select ISA_DMA_API
  1195. # Select ISA DMA interface
  1196. config ISA_DMA_API
  1197. bool
  1198. config PCI
  1199. bool "PCI support" if MIGHT_HAVE_PCI
  1200. help
  1201. Find out whether you have a PCI motherboard. PCI is the name of a
  1202. bus system, i.e. the way the CPU talks to the other stuff inside
  1203. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1204. VESA. If you have PCI, say Y, otherwise N.
  1205. config PCI_DOMAINS
  1206. bool
  1207. depends on PCI
  1208. config PCI_NANOENGINE
  1209. bool "BSE nanoEngine PCI support"
  1210. depends on SA1100_NANOENGINE
  1211. help
  1212. Enable PCI on the BSE nanoEngine board.
  1213. config PCI_SYSCALL
  1214. def_bool PCI
  1215. # Select the host bridge type
  1216. config PCI_HOST_VIA82C505
  1217. bool
  1218. depends on PCI && ARCH_SHARK
  1219. default y
  1220. config PCI_HOST_ITE8152
  1221. bool
  1222. depends on PCI && MACH_ARMCORE
  1223. default y
  1224. select DMABOUNCE
  1225. source "drivers/pci/Kconfig"
  1226. source "drivers/pcmcia/Kconfig"
  1227. endmenu
  1228. menu "Kernel Features"
  1229. config HAVE_SMP
  1230. bool
  1231. help
  1232. This option should be selected by machines which have an SMP-
  1233. capable CPU.
  1234. The only effect of this option is to make the SMP-related
  1235. options available to the user for configuration.
  1236. config SMP
  1237. bool "Symmetric Multi-Processing"
  1238. depends on CPU_V6K || CPU_V7
  1239. depends on GENERIC_CLOCKEVENTS
  1240. depends on HAVE_SMP
  1241. depends on MMU
  1242. select USE_GENERIC_SMP_HELPERS
  1243. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1244. help
  1245. This enables support for systems with more than one CPU. If you have
  1246. a system with only one CPU, like most personal computers, say N. If
  1247. you have a system with more than one CPU, say Y.
  1248. If you say N here, the kernel will run on single and multiprocessor
  1249. machines, but will use only one CPU of a multiprocessor machine. If
  1250. you say Y here, the kernel will run on many, but not all, single
  1251. processor machines. On a single processor machine, the kernel will
  1252. run faster if you say N here.
  1253. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1254. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1255. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1256. If you don't know what to do here, say N.
  1257. config SMP_ON_UP
  1258. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1259. depends on EXPERIMENTAL
  1260. depends on SMP && !XIP_KERNEL
  1261. default y
  1262. help
  1263. SMP kernels contain instructions which fail on non-SMP processors.
  1264. Enabling this option allows the kernel to modify itself to make
  1265. these instructions safe. Disabling it allows about 1K of space
  1266. savings.
  1267. If you don't know what to do here, say Y.
  1268. config ARM_CPU_TOPOLOGY
  1269. bool "Support cpu topology definition"
  1270. depends on SMP && CPU_V7
  1271. default y
  1272. help
  1273. Support ARM cpu topology definition. The MPIDR register defines
  1274. affinity between processors which is then used to describe the cpu
  1275. topology of an ARM System.
  1276. config SCHED_MC
  1277. bool "Multi-core scheduler support"
  1278. depends on ARM_CPU_TOPOLOGY
  1279. help
  1280. Multi-core scheduler support improves the CPU scheduler's decision
  1281. making when dealing with multi-core CPU chips at a cost of slightly
  1282. increased overhead in some places. If unsure say N here.
  1283. config SCHED_SMT
  1284. bool "SMT scheduler support"
  1285. depends on ARM_CPU_TOPOLOGY
  1286. help
  1287. Improves the CPU scheduler's decision making when dealing with
  1288. MultiThreading at a cost of slightly increased overhead in some
  1289. places. If unsure say N here.
  1290. config HAVE_ARM_SCU
  1291. bool
  1292. help
  1293. This option enables support for the ARM system coherency unit
  1294. config ARM_ARCH_TIMER
  1295. bool "Architected timer support"
  1296. depends on CPU_V7
  1297. help
  1298. This option enables support for the ARM architected timer
  1299. config HAVE_ARM_TWD
  1300. bool
  1301. depends on SMP
  1302. help
  1303. This options enables support for the ARM timer and watchdog unit
  1304. choice
  1305. prompt "Memory split"
  1306. default VMSPLIT_3G
  1307. help
  1308. Select the desired split between kernel and user memory.
  1309. If you are not absolutely sure what you are doing, leave this
  1310. option alone!
  1311. config VMSPLIT_3G
  1312. bool "3G/1G user/kernel split"
  1313. config VMSPLIT_2G
  1314. bool "2G/2G user/kernel split"
  1315. config VMSPLIT_1G
  1316. bool "1G/3G user/kernel split"
  1317. endchoice
  1318. config PAGE_OFFSET
  1319. hex
  1320. default 0x40000000 if VMSPLIT_1G
  1321. default 0x80000000 if VMSPLIT_2G
  1322. default 0xC0000000
  1323. config NR_CPUS
  1324. int "Maximum number of CPUs (2-32)"
  1325. range 2 32
  1326. depends on SMP
  1327. default "4"
  1328. config HOTPLUG_CPU
  1329. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1330. depends on SMP && HOTPLUG && EXPERIMENTAL
  1331. help
  1332. Say Y here to experiment with turning CPUs off and on. CPUs
  1333. can be controlled through /sys/devices/system/cpu.
  1334. config LOCAL_TIMERS
  1335. bool "Use local timer interrupts"
  1336. depends on SMP
  1337. default y
  1338. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1339. help
  1340. Enable support for local timers on SMP platforms, rather then the
  1341. legacy IPI broadcast method. Local timers allows the system
  1342. accounting to be spread across the timer interval, preventing a
  1343. "thundering herd" at every timer tick.
  1344. config ARCH_NR_GPIO
  1345. int
  1346. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1347. default 355 if ARCH_U8500
  1348. default 264 if MACH_H4700
  1349. default 0
  1350. help
  1351. Maximum number of GPIOs in the system.
  1352. If unsure, leave the default value.
  1353. source kernel/Kconfig.preempt
  1354. config HZ
  1355. int
  1356. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1357. ARCH_S5PV210 || ARCH_EXYNOS4
  1358. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1359. default AT91_TIMER_HZ if ARCH_AT91
  1360. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1361. default 100
  1362. config THUMB2_KERNEL
  1363. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1364. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1365. select AEABI
  1366. select ARM_ASM_UNIFIED
  1367. select ARM_UNWIND
  1368. help
  1369. By enabling this option, the kernel will be compiled in
  1370. Thumb-2 mode. A compiler/assembler that understand the unified
  1371. ARM-Thumb syntax is needed.
  1372. If unsure, say N.
  1373. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1374. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1375. depends on THUMB2_KERNEL && MODULES
  1376. default y
  1377. help
  1378. Various binutils versions can resolve Thumb-2 branches to
  1379. locally-defined, preemptible global symbols as short-range "b.n"
  1380. branch instructions.
  1381. This is a problem, because there's no guarantee the final
  1382. destination of the symbol, or any candidate locations for a
  1383. trampoline, are within range of the branch. For this reason, the
  1384. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1385. relocation in modules at all, and it makes little sense to add
  1386. support.
  1387. The symptom is that the kernel fails with an "unsupported
  1388. relocation" error when loading some modules.
  1389. Until fixed tools are available, passing
  1390. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1391. code which hits this problem, at the cost of a bit of extra runtime
  1392. stack usage in some cases.
  1393. The problem is described in more detail at:
  1394. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1395. Only Thumb-2 kernels are affected.
  1396. Unless you are sure your tools don't have this problem, say Y.
  1397. config ARM_ASM_UNIFIED
  1398. bool
  1399. config AEABI
  1400. bool "Use the ARM EABI to compile the kernel"
  1401. help
  1402. This option allows for the kernel to be compiled using the latest
  1403. ARM ABI (aka EABI). This is only useful if you are using a user
  1404. space environment that is also compiled with EABI.
  1405. Since there are major incompatibilities between the legacy ABI and
  1406. EABI, especially with regard to structure member alignment, this
  1407. option also changes the kernel syscall calling convention to
  1408. disambiguate both ABIs and allow for backward compatibility support
  1409. (selected with CONFIG_OABI_COMPAT).
  1410. To use this you need GCC version 4.0.0 or later.
  1411. config OABI_COMPAT
  1412. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1413. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1414. default y
  1415. help
  1416. This option preserves the old syscall interface along with the
  1417. new (ARM EABI) one. It also provides a compatibility layer to
  1418. intercept syscalls that have structure arguments which layout
  1419. in memory differs between the legacy ABI and the new ARM EABI
  1420. (only for non "thumb" binaries). This option adds a tiny
  1421. overhead to all syscalls and produces a slightly larger kernel.
  1422. If you know you'll be using only pure EABI user space then you
  1423. can say N here. If this option is not selected and you attempt
  1424. to execute a legacy ABI binary then the result will be
  1425. UNPREDICTABLE (in fact it can be predicted that it won't work
  1426. at all). If in doubt say Y.
  1427. config ARCH_HAS_HOLES_MEMORYMODEL
  1428. bool
  1429. config ARCH_SPARSEMEM_ENABLE
  1430. bool
  1431. config ARCH_SPARSEMEM_DEFAULT
  1432. def_bool ARCH_SPARSEMEM_ENABLE
  1433. config ARCH_SELECT_MEMORY_MODEL
  1434. def_bool ARCH_SPARSEMEM_ENABLE
  1435. config HAVE_ARCH_PFN_VALID
  1436. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1437. config HIGHMEM
  1438. bool "High Memory Support"
  1439. depends on MMU
  1440. help
  1441. The address space of ARM processors is only 4 Gigabytes large
  1442. and it has to accommodate user address space, kernel address
  1443. space as well as some memory mapped IO. That means that, if you
  1444. have a large amount of physical memory and/or IO, not all of the
  1445. memory can be "permanently mapped" by the kernel. The physical
  1446. memory that is not permanently mapped is called "high memory".
  1447. Depending on the selected kernel/user memory split, minimum
  1448. vmalloc space and actual amount of RAM, you may not need this
  1449. option which should result in a slightly faster kernel.
  1450. If unsure, say n.
  1451. config HIGHPTE
  1452. bool "Allocate 2nd-level pagetables from highmem"
  1453. depends on HIGHMEM
  1454. config HW_PERF_EVENTS
  1455. bool "Enable hardware performance counter support for perf events"
  1456. depends on PERF_EVENTS && CPU_HAS_PMU
  1457. default y
  1458. help
  1459. Enable hardware performance counter support for perf events. If
  1460. disabled, perf events will use software events only.
  1461. source "mm/Kconfig"
  1462. config FORCE_MAX_ZONEORDER
  1463. int "Maximum zone order" if ARCH_SHMOBILE
  1464. range 11 64 if ARCH_SHMOBILE
  1465. default "9" if SA1111
  1466. default "11"
  1467. help
  1468. The kernel memory allocator divides physically contiguous memory
  1469. blocks into "zones", where each zone is a power of two number of
  1470. pages. This option selects the largest power of two that the kernel
  1471. keeps in the memory allocator. If you need to allocate very large
  1472. blocks of physically contiguous memory, then you may need to
  1473. increase this value.
  1474. This config option is actually maximum order plus one. For example,
  1475. a value of 11 means that the largest free memory block is 2^10 pages.
  1476. config LEDS
  1477. bool "Timer and CPU usage LEDs"
  1478. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1479. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1480. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1481. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1482. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1483. ARCH_AT91 || ARCH_DAVINCI || \
  1484. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1485. help
  1486. If you say Y here, the LEDs on your machine will be used
  1487. to provide useful information about your current system status.
  1488. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1489. be able to select which LEDs are active using the options below. If
  1490. you are compiling a kernel for the EBSA-110 or the LART however, the
  1491. red LED will simply flash regularly to indicate that the system is
  1492. still functional. It is safe to say Y here if you have a CATS
  1493. system, but the driver will do nothing.
  1494. config LEDS_TIMER
  1495. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1496. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1497. || MACH_OMAP_PERSEUS2
  1498. depends on LEDS
  1499. depends on !GENERIC_CLOCKEVENTS
  1500. default y if ARCH_EBSA110
  1501. help
  1502. If you say Y here, one of the system LEDs (the green one on the
  1503. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1504. will flash regularly to indicate that the system is still
  1505. operational. This is mainly useful to kernel hackers who are
  1506. debugging unstable kernels.
  1507. The LART uses the same LED for both Timer LED and CPU usage LED
  1508. functions. You may choose to use both, but the Timer LED function
  1509. will overrule the CPU usage LED.
  1510. config LEDS_CPU
  1511. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1512. !ARCH_OMAP) \
  1513. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1514. || MACH_OMAP_PERSEUS2
  1515. depends on LEDS
  1516. help
  1517. If you say Y here, the red LED will be used to give a good real
  1518. time indication of CPU usage, by lighting whenever the idle task
  1519. is not currently executing.
  1520. The LART uses the same LED for both Timer LED and CPU usage LED
  1521. functions. You may choose to use both, but the Timer LED function
  1522. will overrule the CPU usage LED.
  1523. config ALIGNMENT_TRAP
  1524. bool
  1525. depends on CPU_CP15_MMU
  1526. default y if !ARCH_EBSA110
  1527. select HAVE_PROC_CPU if PROC_FS
  1528. help
  1529. ARM processors cannot fetch/store information which is not
  1530. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1531. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1532. fetch/store instructions will be emulated in software if you say
  1533. here, which has a severe performance impact. This is necessary for
  1534. correct operation of some network protocols. With an IP-only
  1535. configuration it is safe to say N, otherwise say Y.
  1536. config UACCESS_WITH_MEMCPY
  1537. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1538. depends on MMU && EXPERIMENTAL
  1539. default y if CPU_FEROCEON
  1540. help
  1541. Implement faster copy_to_user and clear_user methods for CPU
  1542. cores where a 8-word STM instruction give significantly higher
  1543. memory write throughput than a sequence of individual 32bit stores.
  1544. A possible side effect is a slight increase in scheduling latency
  1545. between threads sharing the same address space if they invoke
  1546. such copy operations with large buffers.
  1547. However, if the CPU data cache is using a write-allocate mode,
  1548. this option is unlikely to provide any performance gain.
  1549. config SECCOMP
  1550. bool
  1551. prompt "Enable seccomp to safely compute untrusted bytecode"
  1552. ---help---
  1553. This kernel feature is useful for number crunching applications
  1554. that may need to compute untrusted bytecode during their
  1555. execution. By using pipes or other transports made available to
  1556. the process as file descriptors supporting the read/write
  1557. syscalls, it's possible to isolate those applications in
  1558. their own address space using seccomp. Once seccomp is
  1559. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1560. and the task is only allowed to execute a few safe syscalls
  1561. defined by each seccomp mode.
  1562. config CC_STACKPROTECTOR
  1563. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1564. depends on EXPERIMENTAL
  1565. help
  1566. This option turns on the -fstack-protector GCC feature. This
  1567. feature puts, at the beginning of functions, a canary value on
  1568. the stack just before the return address, and validates
  1569. the value just before actually returning. Stack based buffer
  1570. overflows (that need to overwrite this return address) now also
  1571. overwrite the canary, which gets detected and the attack is then
  1572. neutralized via a kernel panic.
  1573. This feature requires gcc version 4.2 or above.
  1574. config DEPRECATED_PARAM_STRUCT
  1575. bool "Provide old way to pass kernel parameters"
  1576. help
  1577. This was deprecated in 2001 and announced to live on for 5 years.
  1578. Some old boot loaders still use this way.
  1579. endmenu
  1580. menu "Boot options"
  1581. config USE_OF
  1582. bool "Flattened Device Tree support"
  1583. select OF
  1584. select OF_EARLY_FLATTREE
  1585. select IRQ_DOMAIN
  1586. help
  1587. Include support for flattened device tree machine descriptions.
  1588. # Compressed boot loader in ROM. Yes, we really want to ask about
  1589. # TEXT and BSS so we preserve their values in the config files.
  1590. config ZBOOT_ROM_TEXT
  1591. hex "Compressed ROM boot loader base address"
  1592. default "0"
  1593. help
  1594. The physical address at which the ROM-able zImage is to be
  1595. placed in the target. Platforms which normally make use of
  1596. ROM-able zImage formats normally set this to a suitable
  1597. value in their defconfig file.
  1598. If ZBOOT_ROM is not enabled, this has no effect.
  1599. config ZBOOT_ROM_BSS
  1600. hex "Compressed ROM boot loader BSS address"
  1601. default "0"
  1602. help
  1603. The base address of an area of read/write memory in the target
  1604. for the ROM-able zImage which must be available while the
  1605. decompressor is running. It must be large enough to hold the
  1606. entire decompressed kernel plus an additional 128 KiB.
  1607. Platforms which normally make use of ROM-able zImage formats
  1608. normally set this to a suitable value in their defconfig file.
  1609. If ZBOOT_ROM is not enabled, this has no effect.
  1610. config ZBOOT_ROM
  1611. bool "Compressed boot loader in ROM/flash"
  1612. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1613. help
  1614. Say Y here if you intend to execute your compressed kernel image
  1615. (zImage) directly from ROM or flash. If unsure, say N.
  1616. choice
  1617. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1618. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1619. default ZBOOT_ROM_NONE
  1620. help
  1621. Include experimental SD/MMC loading code in the ROM-able zImage.
  1622. With this enabled it is possible to write the ROM-able zImage
  1623. kernel image to an MMC or SD card and boot the kernel straight
  1624. from the reset vector. At reset the processor Mask ROM will load
  1625. the first part of the ROM-able zImage which in turn loads the
  1626. rest the kernel image to RAM.
  1627. config ZBOOT_ROM_NONE
  1628. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1629. help
  1630. Do not load image from SD or MMC
  1631. config ZBOOT_ROM_MMCIF
  1632. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1633. help
  1634. Load image from MMCIF hardware block.
  1635. config ZBOOT_ROM_SH_MOBILE_SDHI
  1636. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1637. help
  1638. Load image from SDHI hardware block
  1639. endchoice
  1640. config ARM_APPENDED_DTB
  1641. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1642. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1643. help
  1644. With this option, the boot code will look for a device tree binary
  1645. (DTB) appended to zImage
  1646. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1647. This is meant as a backward compatibility convenience for those
  1648. systems with a bootloader that can't be upgraded to accommodate
  1649. the documented boot protocol using a device tree.
  1650. Beware that there is very little in terms of protection against
  1651. this option being confused by leftover garbage in memory that might
  1652. look like a DTB header after a reboot if no actual DTB is appended
  1653. to zImage. Do not leave this option active in a production kernel
  1654. if you don't intend to always append a DTB. Proper passing of the
  1655. location into r2 of a bootloader provided DTB is always preferable
  1656. to this option.
  1657. config ARM_ATAG_DTB_COMPAT
  1658. bool "Supplement the appended DTB with traditional ATAG information"
  1659. depends on ARM_APPENDED_DTB
  1660. help
  1661. Some old bootloaders can't be updated to a DTB capable one, yet
  1662. they provide ATAGs with memory configuration, the ramdisk address,
  1663. the kernel cmdline string, etc. Such information is dynamically
  1664. provided by the bootloader and can't always be stored in a static
  1665. DTB. To allow a device tree enabled kernel to be used with such
  1666. bootloaders, this option allows zImage to extract the information
  1667. from the ATAG list and store it at run time into the appended DTB.
  1668. config CMDLINE
  1669. string "Default kernel command string"
  1670. default ""
  1671. help
  1672. On some architectures (EBSA110 and CATS), there is currently no way
  1673. for the boot loader to pass arguments to the kernel. For these
  1674. architectures, you should supply some command-line options at build
  1675. time by entering them here. As a minimum, you should specify the
  1676. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1677. choice
  1678. prompt "Kernel command line type" if CMDLINE != ""
  1679. default CMDLINE_FROM_BOOTLOADER
  1680. config CMDLINE_FROM_BOOTLOADER
  1681. bool "Use bootloader kernel arguments if available"
  1682. help
  1683. Uses the command-line options passed by the boot loader. If
  1684. the boot loader doesn't provide any, the default kernel command
  1685. string provided in CMDLINE will be used.
  1686. config CMDLINE_EXTEND
  1687. bool "Extend bootloader kernel arguments"
  1688. help
  1689. The command-line arguments provided by the boot loader will be
  1690. appended to the default kernel command string.
  1691. config CMDLINE_FORCE
  1692. bool "Always use the default kernel command string"
  1693. help
  1694. Always use the default kernel command string, even if the boot
  1695. loader passes other arguments to the kernel.
  1696. This is useful if you cannot or don't want to change the
  1697. command-line options your boot loader passes to the kernel.
  1698. endchoice
  1699. config XIP_KERNEL
  1700. bool "Kernel Execute-In-Place from ROM"
  1701. depends on !ZBOOT_ROM && !ARM_LPAE
  1702. help
  1703. Execute-In-Place allows the kernel to run from non-volatile storage
  1704. directly addressable by the CPU, such as NOR flash. This saves RAM
  1705. space since the text section of the kernel is not loaded from flash
  1706. to RAM. Read-write sections, such as the data section and stack,
  1707. are still copied to RAM. The XIP kernel is not compressed since
  1708. it has to run directly from flash, so it will take more space to
  1709. store it. The flash address used to link the kernel object files,
  1710. and for storing it, is configuration dependent. Therefore, if you
  1711. say Y here, you must know the proper physical address where to
  1712. store the kernel image depending on your own flash memory usage.
  1713. Also note that the make target becomes "make xipImage" rather than
  1714. "make zImage" or "make Image". The final kernel binary to put in
  1715. ROM memory will be arch/arm/boot/xipImage.
  1716. If unsure, say N.
  1717. config XIP_PHYS_ADDR
  1718. hex "XIP Kernel Physical Location"
  1719. depends on XIP_KERNEL
  1720. default "0x00080000"
  1721. help
  1722. This is the physical address in your flash memory the kernel will
  1723. be linked for and stored to. This address is dependent on your
  1724. own flash usage.
  1725. config KEXEC
  1726. bool "Kexec system call (EXPERIMENTAL)"
  1727. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1728. help
  1729. kexec is a system call that implements the ability to shutdown your
  1730. current kernel, and to start another kernel. It is like a reboot
  1731. but it is independent of the system firmware. And like a reboot
  1732. you can start any kernel with it, not just Linux.
  1733. It is an ongoing process to be certain the hardware in a machine
  1734. is properly shutdown, so do not be surprised if this code does not
  1735. initially work for you. It may help to enable device hotplugging
  1736. support.
  1737. config ATAGS_PROC
  1738. bool "Export atags in procfs"
  1739. depends on KEXEC
  1740. default y
  1741. help
  1742. Should the atags used to boot the kernel be exported in an "atags"
  1743. file in procfs. Useful with kexec.
  1744. config CRASH_DUMP
  1745. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1746. depends on EXPERIMENTAL
  1747. help
  1748. Generate crash dump after being started by kexec. This should
  1749. be normally only set in special crash dump kernels which are
  1750. loaded in the main kernel with kexec-tools into a specially
  1751. reserved region and then later executed after a crash by
  1752. kdump/kexec. The crash dump kernel must be compiled to a
  1753. memory address not used by the main kernel
  1754. For more details see Documentation/kdump/kdump.txt
  1755. config AUTO_ZRELADDR
  1756. bool "Auto calculation of the decompressed kernel image address"
  1757. depends on !ZBOOT_ROM && !ARCH_U300
  1758. help
  1759. ZRELADDR is the physical address where the decompressed kernel
  1760. image will be placed. If AUTO_ZRELADDR is selected, the address
  1761. will be determined at run-time by masking the current IP with
  1762. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1763. from start of memory.
  1764. endmenu
  1765. menu "CPU Power Management"
  1766. if ARCH_HAS_CPUFREQ
  1767. source "drivers/cpufreq/Kconfig"
  1768. config CPU_FREQ_IMX
  1769. tristate "CPUfreq driver for i.MX CPUs"
  1770. depends on ARCH_MXC && CPU_FREQ
  1771. help
  1772. This enables the CPUfreq driver for i.MX CPUs.
  1773. config CPU_FREQ_SA1100
  1774. bool
  1775. config CPU_FREQ_SA1110
  1776. bool
  1777. config CPU_FREQ_INTEGRATOR
  1778. tristate "CPUfreq driver for ARM Integrator CPUs"
  1779. depends on ARCH_INTEGRATOR && CPU_FREQ
  1780. default y
  1781. help
  1782. This enables the CPUfreq driver for ARM Integrator CPUs.
  1783. For details, take a look at <file:Documentation/cpu-freq>.
  1784. If in doubt, say Y.
  1785. config CPU_FREQ_PXA
  1786. bool
  1787. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1788. default y
  1789. select CPU_FREQ_TABLE
  1790. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1791. config CPU_FREQ_S3C
  1792. bool
  1793. help
  1794. Internal configuration node for common cpufreq on Samsung SoC
  1795. config CPU_FREQ_S3C24XX
  1796. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1797. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1798. select CPU_FREQ_S3C
  1799. help
  1800. This enables the CPUfreq driver for the Samsung S3C24XX family
  1801. of CPUs.
  1802. For details, take a look at <file:Documentation/cpu-freq>.
  1803. If in doubt, say N.
  1804. config CPU_FREQ_S3C24XX_PLL
  1805. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1806. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1807. help
  1808. Compile in support for changing the PLL frequency from the
  1809. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1810. after a frequency change, so by default it is not enabled.
  1811. This also means that the PLL tables for the selected CPU(s) will
  1812. be built which may increase the size of the kernel image.
  1813. config CPU_FREQ_S3C24XX_DEBUG
  1814. bool "Debug CPUfreq Samsung driver core"
  1815. depends on CPU_FREQ_S3C24XX
  1816. help
  1817. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1818. config CPU_FREQ_S3C24XX_IODEBUG
  1819. bool "Debug CPUfreq Samsung driver IO timing"
  1820. depends on CPU_FREQ_S3C24XX
  1821. help
  1822. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1823. config CPU_FREQ_S3C24XX_DEBUGFS
  1824. bool "Export debugfs for CPUFreq"
  1825. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1826. help
  1827. Export status information via debugfs.
  1828. endif
  1829. source "drivers/cpuidle/Kconfig"
  1830. endmenu
  1831. menu "Floating point emulation"
  1832. comment "At least one emulation must be selected"
  1833. config FPE_NWFPE
  1834. bool "NWFPE math emulation"
  1835. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1836. ---help---
  1837. Say Y to include the NWFPE floating point emulator in the kernel.
  1838. This is necessary to run most binaries. Linux does not currently
  1839. support floating point hardware so you need to say Y here even if
  1840. your machine has an FPA or floating point co-processor podule.
  1841. You may say N here if you are going to load the Acorn FPEmulator
  1842. early in the bootup.
  1843. config FPE_NWFPE_XP
  1844. bool "Support extended precision"
  1845. depends on FPE_NWFPE
  1846. help
  1847. Say Y to include 80-bit support in the kernel floating-point
  1848. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1849. Note that gcc does not generate 80-bit operations by default,
  1850. so in most cases this option only enlarges the size of the
  1851. floating point emulator without any good reason.
  1852. You almost surely want to say N here.
  1853. config FPE_FASTFPE
  1854. bool "FastFPE math emulation (EXPERIMENTAL)"
  1855. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1856. ---help---
  1857. Say Y here to include the FAST floating point emulator in the kernel.
  1858. This is an experimental much faster emulator which now also has full
  1859. precision for the mantissa. It does not support any exceptions.
  1860. It is very simple, and approximately 3-6 times faster than NWFPE.
  1861. It should be sufficient for most programs. It may be not suitable
  1862. for scientific calculations, but you have to check this for yourself.
  1863. If you do not feel you need a faster FP emulation you should better
  1864. choose NWFPE.
  1865. config VFP
  1866. bool "VFP-format floating point maths"
  1867. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1868. help
  1869. Say Y to include VFP support code in the kernel. This is needed
  1870. if your hardware includes a VFP unit.
  1871. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1872. release notes and additional status information.
  1873. Say N if your target does not have VFP hardware.
  1874. config VFPv3
  1875. bool
  1876. depends on VFP
  1877. default y if CPU_V7
  1878. config NEON
  1879. bool "Advanced SIMD (NEON) Extension support"
  1880. depends on VFPv3 && CPU_V7
  1881. help
  1882. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1883. Extension.
  1884. endmenu
  1885. menu "Userspace binary formats"
  1886. source "fs/Kconfig.binfmt"
  1887. config ARTHUR
  1888. tristate "RISC OS personality"
  1889. depends on !AEABI
  1890. help
  1891. Say Y here to include the kernel code necessary if you want to run
  1892. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1893. experimental; if this sounds frightening, say N and sleep in peace.
  1894. You can also say M here to compile this support as a module (which
  1895. will be called arthur).
  1896. endmenu
  1897. menu "Power management options"
  1898. source "kernel/power/Kconfig"
  1899. config ARCH_SUSPEND_POSSIBLE
  1900. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1901. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1902. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1903. def_bool y
  1904. config ARM_CPU_SUSPEND
  1905. def_bool PM_SLEEP
  1906. endmenu
  1907. source "net/Kconfig"
  1908. source "drivers/Kconfig"
  1909. source "fs/Kconfig"
  1910. source "arch/arm/Kconfig.debug"
  1911. source "security/Kconfig"
  1912. source "crypto/Kconfig"
  1913. source "lib/Kconfig"