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
  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_KGDB
  13. select HAVE_KPROBES if !XIP_KERNEL
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_IRQ_WORK
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_GENERIC_HARDIRQS
  30. select HAVE_SPARSE_IRQ
  31. select GENERIC_IRQ_SHOW
  32. select CPU_PM if (SUSPEND || CPU_IDLE)
  33. help
  34. The ARM series is a line of low-power-consumption RISC chip designs
  35. licensed by ARM Ltd and targeted at embedded applications and
  36. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  37. manufactured, but legacy ARM-based PC hardware remains popular in
  38. Europe. There is an ARM Linux project with a web page at
  39. <http://www.arm.linux.org.uk/>.
  40. config ARM_HAS_SG_CHAIN
  41. bool
  42. config HAVE_PWM
  43. bool
  44. config MIGHT_HAVE_PCI
  45. bool
  46. config SYS_SUPPORTS_APM_EMULATION
  47. bool
  48. config HAVE_SCHED_CLOCK
  49. bool
  50. config GENERIC_GPIO
  51. bool
  52. config ARCH_USES_GETTIMEOFFSET
  53. bool
  54. default n
  55. config GENERIC_CLOCKEVENTS
  56. bool
  57. config GENERIC_CLOCKEVENTS_BROADCAST
  58. bool
  59. depends on GENERIC_CLOCKEVENTS
  60. default y if SMP
  61. config KTIME_SCALAR
  62. bool
  63. default y
  64. config HAVE_TCM
  65. bool
  66. select GENERIC_ALLOCATOR
  67. config HAVE_PROC_CPU
  68. bool
  69. config NO_IOPORT
  70. bool
  71. config EISA
  72. bool
  73. ---help---
  74. The Extended Industry Standard Architecture (EISA) bus was
  75. developed as an open alternative to the IBM MicroChannel bus.
  76. The EISA bus provided some of the features of the IBM MicroChannel
  77. bus while maintaining backward compatibility with cards made for
  78. the older ISA bus. The EISA bus saw limited use between 1988 and
  79. 1995 when it was made obsolete by the PCI bus.
  80. Say Y here if you are building a kernel for an EISA-based machine.
  81. Otherwise, say N.
  82. config SBUS
  83. bool
  84. config MCA
  85. bool
  86. help
  87. MicroChannel Architecture is found in some IBM PS/2 machines and
  88. laptops. It is a bus system similar to PCI or ISA. See
  89. <file:Documentation/mca.txt> (and especially the web page given
  90. there) before attempting to build an MCA bus kernel.
  91. config STACKTRACE_SUPPORT
  92. bool
  93. default y
  94. config HAVE_LATENCYTOP_SUPPORT
  95. bool
  96. depends on !SMP
  97. default y
  98. config LOCKDEP_SUPPORT
  99. bool
  100. default y
  101. config TRACE_IRQFLAGS_SUPPORT
  102. bool
  103. default y
  104. config HARDIRQS_SW_RESEND
  105. bool
  106. default y
  107. config GENERIC_IRQ_PROBE
  108. bool
  109. default y
  110. config GENERIC_LOCKBREAK
  111. bool
  112. default y
  113. depends on SMP && PREEMPT
  114. config RWSEM_GENERIC_SPINLOCK
  115. bool
  116. default y
  117. config RWSEM_XCHGADD_ALGORITHM
  118. bool
  119. config ARCH_HAS_ILOG2_U32
  120. bool
  121. config ARCH_HAS_ILOG2_U64
  122. bool
  123. config ARCH_HAS_CPUFREQ
  124. bool
  125. help
  126. Internal node to signify that the ARCH has CPUFREQ support
  127. and that the relevant menu configurations are displayed for
  128. it.
  129. config ARCH_HAS_CPU_IDLE_WAIT
  130. def_bool y
  131. config GENERIC_HWEIGHT
  132. bool
  133. default y
  134. config GENERIC_CALIBRATE_DELAY
  135. bool
  136. default y
  137. config ARCH_MAY_HAVE_PC_FDC
  138. bool
  139. config ZONE_DMA
  140. bool
  141. config NEED_DMA_MAP_STATE
  142. def_bool y
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config ARCH_MTD_XIP
  148. bool
  149. config VECTORS_BASE
  150. hex
  151. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  152. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  153. default 0x00000000
  154. help
  155. The base address of exception vectors.
  156. config ARM_PATCH_PHYS_VIRT
  157. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  158. default y
  159. depends on !XIP_KERNEL && MMU
  160. depends on !ARCH_REALVIEW || !SPARSEMEM
  161. help
  162. Patch phys-to-virt and virt-to-phys translation functions at
  163. boot and module load time according to the position of the
  164. kernel in system memory.
  165. This can only be used with non-XIP MMU kernels where the base
  166. of physical memory is at a 16MB boundary.
  167. Only disable this option if you know that you do not require
  168. this feature (eg, building a kernel for a single machine) and
  169. you need to shrink the kernel to the minimal size.
  170. config NEED_MACH_MEMORY_H
  171. bool
  172. help
  173. Select this when mach/memory.h is required to provide special
  174. definitions for this platform. The need for mach/memory.h should
  175. be avoided when possible.
  176. config PHYS_OFFSET
  177. hex "Physical address of main memory"
  178. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  179. help
  180. Please provide the physical address corresponding to the
  181. location of main memory in your system.
  182. source "init/Kconfig"
  183. source "kernel/Kconfig.freezer"
  184. menu "System Type"
  185. config MMU
  186. bool "MMU-based Paged Memory Management Support"
  187. default y
  188. help
  189. Select if you want MMU-based virtualised addressing space
  190. support by paged memory management. If unsure, say 'Y'.
  191. #
  192. # The "ARM system type" choice list is ordered alphabetically by option
  193. # text. Please add new entries in the option alphabetic order.
  194. #
  195. choice
  196. prompt "ARM system type"
  197. default ARCH_VERSATILE
  198. config ARCH_INTEGRATOR
  199. bool "ARM Ltd. Integrator family"
  200. select ARM_AMBA
  201. select ARCH_HAS_CPUFREQ
  202. select CLKDEV_LOOKUP
  203. select HAVE_MACH_CLKDEV
  204. select ICST
  205. select GENERIC_CLOCKEVENTS
  206. select PLAT_VERSATILE
  207. select PLAT_VERSATILE_FPGA_IRQ
  208. select NEED_MACH_MEMORY_H
  209. help
  210. Support for ARM's Integrator platform.
  211. config ARCH_REALVIEW
  212. bool "ARM Ltd. RealView family"
  213. select ARM_AMBA
  214. select CLKDEV_LOOKUP
  215. select HAVE_MACH_CLKDEV
  216. select ICST
  217. select GENERIC_CLOCKEVENTS
  218. select ARCH_WANT_OPTIONAL_GPIOLIB
  219. select PLAT_VERSATILE
  220. select PLAT_VERSATILE_CLCD
  221. select ARM_TIMER_SP804
  222. select GPIO_PL061 if GPIOLIB
  223. select NEED_MACH_MEMORY_H
  224. help
  225. This enables support for ARM Ltd RealView boards.
  226. config ARCH_VERSATILE
  227. bool "ARM Ltd. Versatile family"
  228. select ARM_AMBA
  229. select ARM_VIC
  230. select CLKDEV_LOOKUP
  231. select HAVE_MACH_CLKDEV
  232. select ICST
  233. select GENERIC_CLOCKEVENTS
  234. select ARCH_WANT_OPTIONAL_GPIOLIB
  235. select PLAT_VERSATILE
  236. select PLAT_VERSATILE_CLCD
  237. select PLAT_VERSATILE_FPGA_IRQ
  238. select ARM_TIMER_SP804
  239. help
  240. This enables support for ARM Ltd Versatile board.
  241. config ARCH_VEXPRESS
  242. bool "ARM Ltd. Versatile Express family"
  243. select ARCH_WANT_OPTIONAL_GPIOLIB
  244. select ARM_AMBA
  245. select ARM_TIMER_SP804
  246. select CLKDEV_LOOKUP
  247. select HAVE_MACH_CLKDEV
  248. select GENERIC_CLOCKEVENTS
  249. select HAVE_CLK
  250. select HAVE_PATA_PLATFORM
  251. select ICST
  252. select PLAT_VERSATILE
  253. select PLAT_VERSATILE_CLCD
  254. help
  255. This enables support for the ARM Ltd Versatile Express boards.
  256. config ARCH_AT91
  257. bool "Atmel AT91"
  258. select ARCH_REQUIRE_GPIOLIB
  259. select HAVE_CLK
  260. select CLKDEV_LOOKUP
  261. help
  262. This enables support for systems based on the Atmel AT91RM9200,
  263. AT91SAM9 and AT91CAP9 processors.
  264. config ARCH_BCMRING
  265. bool "Broadcom BCMRING"
  266. depends on MMU
  267. select CPU_V6
  268. select ARM_AMBA
  269. select ARM_TIMER_SP804
  270. select CLKDEV_LOOKUP
  271. select GENERIC_CLOCKEVENTS
  272. select ARCH_WANT_OPTIONAL_GPIOLIB
  273. help
  274. Support for Broadcom's BCMRing platform.
  275. config ARCH_HIGHBANK
  276. bool "Calxeda Highbank-based"
  277. select ARCH_WANT_OPTIONAL_GPIOLIB
  278. select ARM_AMBA
  279. select ARM_GIC
  280. select ARM_TIMER_SP804
  281. select CLKDEV_LOOKUP
  282. select CPU_V7
  283. select GENERIC_CLOCKEVENTS
  284. select HAVE_ARM_SCU
  285. select USE_OF
  286. help
  287. Support for the Calxeda Highbank SoC based boards.
  288. config ARCH_CLPS711X
  289. bool "Cirrus Logic CLPS711x/EP721x-based"
  290. select CPU_ARM720T
  291. select ARCH_USES_GETTIMEOFFSET
  292. select NEED_MACH_MEMORY_H
  293. help
  294. Support for Cirrus Logic 711x/721x based boards.
  295. config ARCH_CNS3XXX
  296. bool "Cavium Networks CNS3XXX family"
  297. select CPU_V6K
  298. select GENERIC_CLOCKEVENTS
  299. select ARM_GIC
  300. select MIGHT_HAVE_PCI
  301. select PCI_DOMAINS if PCI
  302. help
  303. Support for Cavium Networks CNS3XXX platform.
  304. config ARCH_GEMINI
  305. bool "Cortina Systems Gemini"
  306. select CPU_FA526
  307. select ARCH_REQUIRE_GPIOLIB
  308. select ARCH_USES_GETTIMEOFFSET
  309. help
  310. Support for the Cortina Systems Gemini family SoCs
  311. config ARCH_PRIMA2
  312. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  313. select CPU_V7
  314. select GENERIC_TIME
  315. select NO_IOPORT
  316. select GENERIC_CLOCKEVENTS
  317. select CLKDEV_LOOKUP
  318. select GENERIC_IRQ_CHIP
  319. select USE_OF
  320. select ZONE_DMA
  321. help
  322. Support for CSR SiRFSoC ARM Cortex A9 Platform
  323. config ARCH_EBSA110
  324. bool "EBSA-110"
  325. select CPU_SA110
  326. select ISA
  327. select NO_IOPORT
  328. select ARCH_USES_GETTIMEOFFSET
  329. select NEED_MACH_MEMORY_H
  330. help
  331. This is an evaluation board for the StrongARM processor available
  332. from Digital. It has limited hardware on-board, including an
  333. Ethernet interface, two PCMCIA sockets, two serial ports and a
  334. parallel port.
  335. config ARCH_EP93XX
  336. bool "EP93xx-based"
  337. select CPU_ARM920T
  338. select ARM_AMBA
  339. select ARM_VIC
  340. select CLKDEV_LOOKUP
  341. select ARCH_REQUIRE_GPIOLIB
  342. select ARCH_HAS_HOLES_MEMORYMODEL
  343. select ARCH_USES_GETTIMEOFFSET
  344. select NEED_MEMORY_H
  345. help
  346. This enables support for the Cirrus EP93xx series of CPUs.
  347. config ARCH_FOOTBRIDGE
  348. bool "FootBridge"
  349. select CPU_SA110
  350. select FOOTBRIDGE
  351. select GENERIC_CLOCKEVENTS
  352. select NEED_MACH_MEMORY_H
  353. help
  354. Support for systems based on the DC21285 companion chip
  355. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  356. config ARCH_MXC
  357. bool "Freescale MXC/iMX-based"
  358. select GENERIC_CLOCKEVENTS
  359. select ARCH_REQUIRE_GPIOLIB
  360. select CLKDEV_LOOKUP
  361. select CLKSRC_MMIO
  362. select GENERIC_IRQ_CHIP
  363. select HAVE_SCHED_CLOCK
  364. select MULTI_IRQ_HANDLER
  365. help
  366. Support for Freescale MXC/iMX-based family of processors
  367. config ARCH_MXS
  368. bool "Freescale MXS-based"
  369. select GENERIC_CLOCKEVENTS
  370. select ARCH_REQUIRE_GPIOLIB
  371. select CLKDEV_LOOKUP
  372. select CLKSRC_MMIO
  373. help
  374. Support for Freescale MXS-based family of processors
  375. config ARCH_NETX
  376. bool "Hilscher NetX based"
  377. select CLKSRC_MMIO
  378. select CPU_ARM926T
  379. select ARM_VIC
  380. select GENERIC_CLOCKEVENTS
  381. help
  382. This enables support for systems based on the Hilscher NetX Soc
  383. config ARCH_H720X
  384. bool "Hynix HMS720x-based"
  385. select CPU_ARM720T
  386. select ISA_DMA_API
  387. select ARCH_USES_GETTIMEOFFSET
  388. help
  389. This enables support for systems based on the Hynix HMS720x
  390. config ARCH_IOP13XX
  391. bool "IOP13xx-based"
  392. depends on MMU
  393. select CPU_XSC3
  394. select PLAT_IOP
  395. select PCI
  396. select ARCH_SUPPORTS_MSI
  397. select VMSPLIT_1G
  398. select NEED_MACH_MEMORY_H
  399. help
  400. Support for Intel's IOP13XX (XScale) family of processors.
  401. config ARCH_IOP32X
  402. bool "IOP32x-based"
  403. depends on MMU
  404. select CPU_XSCALE
  405. select PLAT_IOP
  406. select PCI
  407. select ARCH_REQUIRE_GPIOLIB
  408. help
  409. Support for Intel's 80219 and IOP32X (XScale) family of
  410. processors.
  411. config ARCH_IOP33X
  412. bool "IOP33x-based"
  413. depends on MMU
  414. select CPU_XSCALE
  415. select PLAT_IOP
  416. select PCI
  417. select ARCH_REQUIRE_GPIOLIB
  418. help
  419. Support for Intel's IOP33X (XScale) family of processors.
  420. config ARCH_IXP23XX
  421. bool "IXP23XX-based"
  422. depends on MMU
  423. select CPU_XSC3
  424. select PCI
  425. select ARCH_USES_GETTIMEOFFSET
  426. select NEED_MACH_MEMORY_H
  427. help
  428. Support for Intel's IXP23xx (XScale) family of processors.
  429. config ARCH_IXP2000
  430. bool "IXP2400/2800-based"
  431. depends on MMU
  432. select CPU_XSCALE
  433. select PCI
  434. select ARCH_USES_GETTIMEOFFSET
  435. select NEED_MACH_MEMORY_H
  436. help
  437. Support for Intel's IXP2400/2800 (XScale) family of processors.
  438. config ARCH_IXP4XX
  439. bool "IXP4xx-based"
  440. depends on MMU
  441. select CLKSRC_MMIO
  442. select CPU_XSCALE
  443. select GENERIC_GPIO
  444. select GENERIC_CLOCKEVENTS
  445. select HAVE_SCHED_CLOCK
  446. select MIGHT_HAVE_PCI
  447. select DMABOUNCE if PCI
  448. help
  449. Support for Intel's IXP4XX (XScale) family of processors.
  450. config ARCH_DOVE
  451. bool "Marvell Dove"
  452. select CPU_V7
  453. select PCI
  454. select ARCH_REQUIRE_GPIOLIB
  455. select GENERIC_CLOCKEVENTS
  456. select PLAT_ORION
  457. help
  458. Support for the Marvell Dove SoC 88AP510
  459. config ARCH_KIRKWOOD
  460. bool "Marvell Kirkwood"
  461. select CPU_FEROCEON
  462. select PCI
  463. select ARCH_REQUIRE_GPIOLIB
  464. select GENERIC_CLOCKEVENTS
  465. select PLAT_ORION
  466. help
  467. Support for the following Marvell Kirkwood series SoCs:
  468. 88F6180, 88F6192 and 88F6281.
  469. config ARCH_LPC32XX
  470. bool "NXP LPC32XX"
  471. select CLKSRC_MMIO
  472. select CPU_ARM926T
  473. select ARCH_REQUIRE_GPIOLIB
  474. select HAVE_IDE
  475. select ARM_AMBA
  476. select USB_ARCH_HAS_OHCI
  477. select CLKDEV_LOOKUP
  478. select GENERIC_TIME
  479. select GENERIC_CLOCKEVENTS
  480. help
  481. Support for the NXP LPC32XX family of processors
  482. config ARCH_MV78XX0
  483. bool "Marvell MV78xx0"
  484. select CPU_FEROCEON
  485. select PCI
  486. select ARCH_REQUIRE_GPIOLIB
  487. select GENERIC_CLOCKEVENTS
  488. select PLAT_ORION
  489. help
  490. Support for the following Marvell MV78xx0 series SoCs:
  491. MV781x0, MV782x0.
  492. config ARCH_ORION5X
  493. bool "Marvell Orion"
  494. depends on MMU
  495. select CPU_FEROCEON
  496. select PCI
  497. select ARCH_REQUIRE_GPIOLIB
  498. select GENERIC_CLOCKEVENTS
  499. select PLAT_ORION
  500. help
  501. Support for the following Marvell Orion 5x series SoCs:
  502. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  503. Orion-2 (5281), Orion-1-90 (6183).
  504. config ARCH_MMP
  505. bool "Marvell PXA168/910/MMP2"
  506. depends on MMU
  507. select ARCH_REQUIRE_GPIOLIB
  508. select CLKDEV_LOOKUP
  509. select GENERIC_CLOCKEVENTS
  510. select HAVE_SCHED_CLOCK
  511. select TICK_ONESHOT
  512. select PLAT_PXA
  513. select SPARSE_IRQ
  514. help
  515. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  516. config ARCH_KS8695
  517. bool "Micrel/Kendin KS8695"
  518. select CPU_ARM922T
  519. select ARCH_REQUIRE_GPIOLIB
  520. select ARCH_USES_GETTIMEOFFSET
  521. select NEED_MACH_MEMORY_H
  522. help
  523. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  524. System-on-Chip devices.
  525. config ARCH_W90X900
  526. bool "Nuvoton W90X900 CPU"
  527. select CPU_ARM926T
  528. select ARCH_REQUIRE_GPIOLIB
  529. select CLKDEV_LOOKUP
  530. select CLKSRC_MMIO
  531. select GENERIC_CLOCKEVENTS
  532. help
  533. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  534. At present, the w90x900 has been renamed nuc900, regarding
  535. the ARM series product line, you can login the following
  536. link address to know more.
  537. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  538. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  539. config ARCH_NUC93X
  540. bool "Nuvoton NUC93X CPU"
  541. select CPU_ARM926T
  542. select CLKDEV_LOOKUP
  543. help
  544. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  545. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  546. config ARCH_TEGRA
  547. bool "NVIDIA Tegra"
  548. select CLKDEV_LOOKUP
  549. select CLKSRC_MMIO
  550. select GENERIC_TIME
  551. select GENERIC_CLOCKEVENTS
  552. select GENERIC_GPIO
  553. select HAVE_CLK
  554. select HAVE_SCHED_CLOCK
  555. select ARCH_HAS_CPUFREQ
  556. help
  557. This enables support for NVIDIA Tegra based systems (Tegra APX,
  558. Tegra 6xx and Tegra 2 series).
  559. config ARCH_PICOXCELL
  560. bool "Picochip picoXcell"
  561. select ARCH_REQUIRE_GPIOLIB
  562. select ARM_PATCH_PHYS_VIRT
  563. select ARM_VIC
  564. select CPU_V6K
  565. select DW_APB_TIMER
  566. select GENERIC_CLOCKEVENTS
  567. select GENERIC_GPIO
  568. select HAVE_SCHED_CLOCK
  569. select HAVE_TCM
  570. select NO_IOPORT
  571. select USE_OF
  572. help
  573. This enables support for systems based on the Picochip picoXcell
  574. family of Femtocell devices. The picoxcell support requires device tree
  575. for all boards.
  576. config ARCH_PNX4008
  577. bool "Philips Nexperia PNX4008 Mobile"
  578. select CPU_ARM926T
  579. select CLKDEV_LOOKUP
  580. select ARCH_USES_GETTIMEOFFSET
  581. help
  582. This enables support for Philips PNX4008 mobile platform.
  583. config ARCH_PXA
  584. bool "PXA2xx/PXA3xx-based"
  585. depends on MMU
  586. select ARCH_MTD_XIP
  587. select ARCH_HAS_CPUFREQ
  588. select CLKDEV_LOOKUP
  589. select CLKSRC_MMIO
  590. select ARCH_REQUIRE_GPIOLIB
  591. select GENERIC_CLOCKEVENTS
  592. select HAVE_SCHED_CLOCK
  593. select TICK_ONESHOT
  594. select PLAT_PXA
  595. select SPARSE_IRQ
  596. select AUTO_ZRELADDR
  597. select MULTI_IRQ_HANDLER
  598. help
  599. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  600. config ARCH_MSM
  601. bool "Qualcomm MSM"
  602. select HAVE_CLK
  603. select GENERIC_CLOCKEVENTS
  604. select ARCH_REQUIRE_GPIOLIB
  605. select CLKDEV_LOOKUP
  606. help
  607. Support for Qualcomm MSM/QSD based systems. This runs on the
  608. apps processor of the MSM/QSD and depends on a shared memory
  609. interface to the modem processor which runs the baseband
  610. stack and controls some vital subsystems
  611. (clock and power control, etc).
  612. config ARCH_SHMOBILE
  613. bool "Renesas SH-Mobile / R-Mobile"
  614. select HAVE_CLK
  615. select CLKDEV_LOOKUP
  616. select HAVE_MACH_CLKDEV
  617. select GENERIC_CLOCKEVENTS
  618. select NO_IOPORT
  619. select SPARSE_IRQ
  620. select MULTI_IRQ_HANDLER
  621. select PM_GENERIC_DOMAINS if PM
  622. select NEED_MACH_MEMORY_H
  623. help
  624. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  625. config ARCH_RPC
  626. bool "RiscPC"
  627. select ARCH_ACORN
  628. select FIQ
  629. select TIMER_ACORN
  630. select ARCH_MAY_HAVE_PC_FDC
  631. select HAVE_PATA_PLATFORM
  632. select ISA_DMA_API
  633. select NO_IOPORT
  634. select ARCH_SPARSEMEM_ENABLE
  635. select ARCH_USES_GETTIMEOFFSET
  636. select NEED_MACH_MEMORY_H
  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 CLKSRC_MMIO
  643. select CPU_SA1100
  644. select ISA
  645. select ARCH_SPARSEMEM_ENABLE
  646. select ARCH_MTD_XIP
  647. select ARCH_HAS_CPUFREQ
  648. select CPU_FREQ
  649. select GENERIC_CLOCKEVENTS
  650. select HAVE_CLK
  651. select HAVE_SCHED_CLOCK
  652. select TICK_ONESHOT
  653. select ARCH_REQUIRE_GPIOLIB
  654. select NEED_MACH_MEMORY_H
  655. help
  656. Support for StrongARM 11x0 based boards.
  657. config ARCH_S3C2410
  658. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  659. select GENERIC_GPIO
  660. select ARCH_HAS_CPUFREQ
  661. select HAVE_CLK
  662. select CLKDEV_LOOKUP
  663. select ARCH_USES_GETTIMEOFFSET
  664. select HAVE_S3C2410_I2C if I2C
  665. help
  666. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  667. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  668. the Samsung SMDK2410 development board (and derivatives).
  669. Note, the S3C2416 and the S3C2450 are so close that they even share
  670. the same SoC ID code. This means that there is no separate machine
  671. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  672. config ARCH_S3C64XX
  673. bool "Samsung S3C64XX"
  674. select PLAT_SAMSUNG
  675. select CPU_V6
  676. select ARM_VIC
  677. select HAVE_CLK
  678. select CLKDEV_LOOKUP
  679. select NO_IOPORT
  680. select ARCH_USES_GETTIMEOFFSET
  681. select ARCH_HAS_CPUFREQ
  682. select ARCH_REQUIRE_GPIOLIB
  683. select SAMSUNG_CLKSRC
  684. select SAMSUNG_IRQ_VIC_TIMER
  685. select SAMSUNG_IRQ_UART
  686. select S3C_GPIO_TRACK
  687. select S3C_GPIO_PULL_UPDOWN
  688. select S3C_GPIO_CFG_S3C24XX
  689. select S3C_GPIO_CFG_S3C64XX
  690. select S3C_DEV_NAND
  691. select USB_ARCH_HAS_OHCI
  692. select SAMSUNG_GPIOLIB_4BIT
  693. select HAVE_S3C2410_I2C if I2C
  694. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  695. help
  696. Samsung S3C64XX series based systems
  697. config ARCH_S5P64X0
  698. bool "Samsung S5P6440 S5P6450"
  699. select CPU_V6
  700. select GENERIC_GPIO
  701. select HAVE_CLK
  702. select CLKDEV_LOOKUP
  703. select CLKSRC_MMIO
  704. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  705. select GENERIC_CLOCKEVENTS
  706. select HAVE_SCHED_CLOCK
  707. select HAVE_S3C2410_I2C if I2C
  708. select HAVE_S3C_RTC if RTC_CLASS
  709. help
  710. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  711. SMDK6450.
  712. config ARCH_S5PC100
  713. bool "Samsung S5PC100"
  714. select GENERIC_GPIO
  715. select HAVE_CLK
  716. select CLKDEV_LOOKUP
  717. select CPU_V7
  718. select ARM_L1_CACHE_SHIFT_6
  719. select ARCH_USES_GETTIMEOFFSET
  720. select HAVE_S3C2410_I2C if I2C
  721. select HAVE_S3C_RTC if RTC_CLASS
  722. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  723. help
  724. Samsung S5PC100 series based systems
  725. config ARCH_S5PV210
  726. bool "Samsung S5PV210/S5PC110"
  727. select CPU_V7
  728. select ARCH_SPARSEMEM_ENABLE
  729. select ARCH_HAS_HOLES_MEMORYMODEL
  730. select GENERIC_GPIO
  731. select HAVE_CLK
  732. select CLKDEV_LOOKUP
  733. select CLKSRC_MMIO
  734. select ARM_L1_CACHE_SHIFT_6
  735. select ARCH_HAS_CPUFREQ
  736. select GENERIC_CLOCKEVENTS
  737. select HAVE_SCHED_CLOCK
  738. select HAVE_S3C2410_I2C if I2C
  739. select HAVE_S3C_RTC if RTC_CLASS
  740. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  741. select NEED_MACH_MEMORY_H
  742. help
  743. Samsung S5PV210/S5PC110 series based systems
  744. config ARCH_EXYNOS4
  745. bool "Samsung EXYNOS4"
  746. select CPU_V7
  747. select ARCH_SPARSEMEM_ENABLE
  748. select ARCH_HAS_HOLES_MEMORYMODEL
  749. select GENERIC_GPIO
  750. select HAVE_CLK
  751. select CLKDEV_LOOKUP
  752. select ARCH_HAS_CPUFREQ
  753. select GENERIC_CLOCKEVENTS
  754. select HAVE_S3C_RTC if RTC_CLASS
  755. select HAVE_S3C2410_I2C if I2C
  756. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  757. select NEED_MACH_MEMORY_H
  758. help
  759. Samsung EXYNOS4 series based systems
  760. config ARCH_SHARK
  761. bool "Shark"
  762. select CPU_SA110
  763. select ISA
  764. select ISA_DMA
  765. select ZONE_DMA
  766. select PCI
  767. select ARCH_USES_GETTIMEOFFSET
  768. select NEED_MACH_MEMORY_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_TCC_926
  773. bool "Telechips TCC ARM926-based systems"
  774. select CLKSRC_MMIO
  775. select CPU_ARM926T
  776. select HAVE_CLK
  777. select CLKDEV_LOOKUP
  778. select GENERIC_CLOCKEVENTS
  779. help
  780. Support for Telechips TCC ARM926-based systems.
  781. config ARCH_U300
  782. bool "ST-Ericsson U300 Series"
  783. depends on MMU
  784. select CLKSRC_MMIO
  785. select CPU_ARM926T
  786. select HAVE_SCHED_CLOCK
  787. select HAVE_TCM
  788. select ARM_AMBA
  789. select ARM_VIC
  790. select GENERIC_CLOCKEVENTS
  791. select CLKDEV_LOOKUP
  792. select HAVE_MACH_CLKDEV
  793. select GENERIC_GPIO
  794. select ARCH_REQUIRE_GPIOLIB
  795. select NEED_MACH_MEMORY_H
  796. help
  797. Support for ST-Ericsson U300 series mobile platforms.
  798. config ARCH_U8500
  799. bool "ST-Ericsson U8500 Series"
  800. select CPU_V7
  801. select ARM_AMBA
  802. select GENERIC_CLOCKEVENTS
  803. select CLKDEV_LOOKUP
  804. select ARCH_REQUIRE_GPIOLIB
  805. select ARCH_HAS_CPUFREQ
  806. help
  807. Support for ST-Ericsson's Ux500 architecture
  808. config ARCH_NOMADIK
  809. bool "STMicroelectronics Nomadik"
  810. select ARM_AMBA
  811. select ARM_VIC
  812. select CPU_ARM926T
  813. select CLKDEV_LOOKUP
  814. select GENERIC_CLOCKEVENTS
  815. select ARCH_REQUIRE_GPIOLIB
  816. help
  817. Support for the Nomadik platform by ST-Ericsson
  818. config ARCH_DAVINCI
  819. bool "TI DaVinci"
  820. select GENERIC_CLOCKEVENTS
  821. select ARCH_REQUIRE_GPIOLIB
  822. select ZONE_DMA
  823. select HAVE_IDE
  824. select CLKDEV_LOOKUP
  825. select GENERIC_ALLOCATOR
  826. select GENERIC_IRQ_CHIP
  827. select ARCH_HAS_HOLES_MEMORYMODEL
  828. help
  829. Support for TI's DaVinci platform.
  830. config ARCH_OMAP
  831. bool "TI OMAP"
  832. select HAVE_CLK
  833. select ARCH_REQUIRE_GPIOLIB
  834. select ARCH_HAS_CPUFREQ
  835. select CLKSRC_MMIO
  836. select GENERIC_CLOCKEVENTS
  837. select HAVE_SCHED_CLOCK
  838. select ARCH_HAS_HOLES_MEMORYMODEL
  839. help
  840. Support for TI's OMAP platform (OMAP1/2/3/4).
  841. config PLAT_SPEAR
  842. bool "ST SPEAr"
  843. select ARM_AMBA
  844. select ARCH_REQUIRE_GPIOLIB
  845. select CLKDEV_LOOKUP
  846. select CLKSRC_MMIO
  847. select GENERIC_CLOCKEVENTS
  848. select HAVE_CLK
  849. help
  850. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  851. config ARCH_VT8500
  852. bool "VIA/WonderMedia 85xx"
  853. select CPU_ARM926T
  854. select GENERIC_GPIO
  855. select ARCH_HAS_CPUFREQ
  856. select GENERIC_CLOCKEVENTS
  857. select ARCH_REQUIRE_GPIOLIB
  858. select HAVE_PWM
  859. help
  860. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  861. config ARCH_ZYNQ
  862. bool "Xilinx Zynq ARM Cortex A9 Platform"
  863. select CPU_V7
  864. select GENERIC_TIME
  865. select GENERIC_CLOCKEVENTS
  866. select CLKDEV_LOOKUP
  867. select ARM_GIC
  868. select ARM_AMBA
  869. select ICST
  870. select USE_OF
  871. help
  872. Support for Xilinx Zynq ARM Cortex A9 Platform
  873. endchoice
  874. #
  875. # This is sorted alphabetically by mach-* pathname. However, plat-*
  876. # Kconfigs may be included either alphabetically (according to the
  877. # plat- suffix) or along side the corresponding mach-* source.
  878. #
  879. source "arch/arm/mach-at91/Kconfig"
  880. source "arch/arm/mach-bcmring/Kconfig"
  881. source "arch/arm/mach-clps711x/Kconfig"
  882. source "arch/arm/mach-cns3xxx/Kconfig"
  883. source "arch/arm/mach-davinci/Kconfig"
  884. source "arch/arm/mach-dove/Kconfig"
  885. source "arch/arm/mach-ep93xx/Kconfig"
  886. source "arch/arm/mach-footbridge/Kconfig"
  887. source "arch/arm/mach-gemini/Kconfig"
  888. source "arch/arm/mach-h720x/Kconfig"
  889. source "arch/arm/mach-integrator/Kconfig"
  890. source "arch/arm/mach-iop32x/Kconfig"
  891. source "arch/arm/mach-iop33x/Kconfig"
  892. source "arch/arm/mach-iop13xx/Kconfig"
  893. source "arch/arm/mach-ixp4xx/Kconfig"
  894. source "arch/arm/mach-ixp2000/Kconfig"
  895. source "arch/arm/mach-ixp23xx/Kconfig"
  896. source "arch/arm/mach-kirkwood/Kconfig"
  897. source "arch/arm/mach-ks8695/Kconfig"
  898. source "arch/arm/mach-lpc32xx/Kconfig"
  899. source "arch/arm/mach-msm/Kconfig"
  900. source "arch/arm/mach-mv78xx0/Kconfig"
  901. source "arch/arm/plat-mxc/Kconfig"
  902. source "arch/arm/mach-mxs/Kconfig"
  903. source "arch/arm/mach-netx/Kconfig"
  904. source "arch/arm/mach-nomadik/Kconfig"
  905. source "arch/arm/plat-nomadik/Kconfig"
  906. source "arch/arm/mach-nuc93x/Kconfig"
  907. source "arch/arm/plat-omap/Kconfig"
  908. source "arch/arm/mach-omap1/Kconfig"
  909. source "arch/arm/mach-omap2/Kconfig"
  910. source "arch/arm/mach-orion5x/Kconfig"
  911. source "arch/arm/mach-pxa/Kconfig"
  912. source "arch/arm/plat-pxa/Kconfig"
  913. source "arch/arm/mach-mmp/Kconfig"
  914. source "arch/arm/mach-realview/Kconfig"
  915. source "arch/arm/mach-sa1100/Kconfig"
  916. source "arch/arm/plat-samsung/Kconfig"
  917. source "arch/arm/plat-s3c24xx/Kconfig"
  918. source "arch/arm/plat-s5p/Kconfig"
  919. source "arch/arm/plat-spear/Kconfig"
  920. source "arch/arm/plat-tcc/Kconfig"
  921. if ARCH_S3C2410
  922. source "arch/arm/mach-s3c2410/Kconfig"
  923. source "arch/arm/mach-s3c2412/Kconfig"
  924. source "arch/arm/mach-s3c2416/Kconfig"
  925. source "arch/arm/mach-s3c2440/Kconfig"
  926. source "arch/arm/mach-s3c2443/Kconfig"
  927. endif
  928. if ARCH_S3C64XX
  929. source "arch/arm/mach-s3c64xx/Kconfig"
  930. endif
  931. source "arch/arm/mach-s5p64x0/Kconfig"
  932. source "arch/arm/mach-s5pc100/Kconfig"
  933. source "arch/arm/mach-s5pv210/Kconfig"
  934. source "arch/arm/mach-exynos4/Kconfig"
  935. source "arch/arm/mach-shmobile/Kconfig"
  936. source "arch/arm/mach-tegra/Kconfig"
  937. source "arch/arm/mach-u300/Kconfig"
  938. source "arch/arm/mach-ux500/Kconfig"
  939. source "arch/arm/mach-versatile/Kconfig"
  940. source "arch/arm/mach-vexpress/Kconfig"
  941. source "arch/arm/plat-versatile/Kconfig"
  942. source "arch/arm/mach-vt8500/Kconfig"
  943. source "arch/arm/mach-w90x900/Kconfig"
  944. # Definitions to make life easier
  945. config ARCH_ACORN
  946. bool
  947. config PLAT_IOP
  948. bool
  949. select GENERIC_CLOCKEVENTS
  950. select HAVE_SCHED_CLOCK
  951. config PLAT_ORION
  952. bool
  953. select CLKSRC_MMIO
  954. select GENERIC_IRQ_CHIP
  955. select HAVE_SCHED_CLOCK
  956. config PLAT_PXA
  957. bool
  958. config PLAT_VERSATILE
  959. bool
  960. config ARM_TIMER_SP804
  961. bool
  962. select CLKSRC_MMIO
  963. source arch/arm/mm/Kconfig
  964. config IWMMXT
  965. bool "Enable iWMMXt support"
  966. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  967. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  968. help
  969. Enable support for iWMMXt context switching at run time if
  970. running on a CPU that supports it.
  971. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  972. config XSCALE_PMU
  973. bool
  974. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  975. default y
  976. config CPU_HAS_PMU
  977. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  978. (!ARCH_OMAP3 || OMAP3_EMU)
  979. default y
  980. bool
  981. config MULTI_IRQ_HANDLER
  982. bool
  983. help
  984. Allow each machine to specify it's own IRQ handler at run time.
  985. if !MMU
  986. source "arch/arm/Kconfig-nommu"
  987. endif
  988. config ARM_ERRATA_411920
  989. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  990. depends on CPU_V6 || CPU_V6K
  991. help
  992. Invalidation of the Instruction Cache operation can
  993. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  994. It does not affect the MPCore. This option enables the ARM Ltd.
  995. recommended workaround.
  996. config ARM_ERRATA_430973
  997. bool "ARM errata: Stale prediction on replaced interworking branch"
  998. depends on CPU_V7
  999. help
  1000. This option enables the workaround for the 430973 Cortex-A8
  1001. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1002. interworking branch is replaced with another code sequence at the
  1003. same virtual address, whether due to self-modifying code or virtual
  1004. to physical address re-mapping, Cortex-A8 does not recover from the
  1005. stale interworking branch prediction. This results in Cortex-A8
  1006. executing the new code sequence in the incorrect ARM or Thumb state.
  1007. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1008. and also flushes the branch target cache at every context switch.
  1009. Note that setting specific bits in the ACTLR register may not be
  1010. available in non-secure mode.
  1011. config ARM_ERRATA_458693
  1012. bool "ARM errata: Processor deadlock when a false hazard is created"
  1013. depends on CPU_V7
  1014. help
  1015. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1016. erratum. For very specific sequences of memory operations, it is
  1017. possible for a hazard condition intended for a cache line to instead
  1018. be incorrectly associated with a different cache line. This false
  1019. hazard might then cause a processor deadlock. The workaround enables
  1020. the L1 caching of the NEON accesses and disables the PLD instruction
  1021. in the ACTLR register. Note that setting specific bits in the ACTLR
  1022. register may not be available in non-secure mode.
  1023. config ARM_ERRATA_460075
  1024. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1025. depends on CPU_V7
  1026. help
  1027. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1028. erratum. Any asynchronous access to the L2 cache may encounter a
  1029. situation in which recent store transactions to the L2 cache are lost
  1030. and overwritten with stale memory contents from external memory. The
  1031. workaround disables the write-allocate mode for the L2 cache via the
  1032. ACTLR register. Note that setting specific bits in the ACTLR register
  1033. may not be available in non-secure mode.
  1034. config ARM_ERRATA_742230
  1035. bool "ARM errata: DMB operation may be faulty"
  1036. depends on CPU_V7 && SMP
  1037. help
  1038. This option enables the workaround for the 742230 Cortex-A9
  1039. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1040. between two write operations may not ensure the correct visibility
  1041. ordering of the two writes. This workaround sets a specific bit in
  1042. the diagnostic register of the Cortex-A9 which causes the DMB
  1043. instruction to behave as a DSB, ensuring the correct behaviour of
  1044. the two writes.
  1045. config ARM_ERRATA_742231
  1046. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1047. depends on CPU_V7 && SMP
  1048. help
  1049. This option enables the workaround for the 742231 Cortex-A9
  1050. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1051. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1052. accessing some data located in the same cache line, may get corrupted
  1053. data due to bad handling of the address hazard when the line gets
  1054. replaced from one of the CPUs at the same time as another CPU is
  1055. accessing it. This workaround sets specific bits in the diagnostic
  1056. register of the Cortex-A9 which reduces the linefill issuing
  1057. capabilities of the processor.
  1058. config PL310_ERRATA_588369
  1059. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1060. depends on CACHE_L2X0
  1061. help
  1062. The PL310 L2 cache controller implements three types of Clean &
  1063. Invalidate maintenance operations: by Physical Address
  1064. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1065. They are architecturally defined to behave as the execution of a
  1066. clean operation followed immediately by an invalidate operation,
  1067. both performing to the same memory location. This functionality
  1068. is not correctly implemented in PL310 as clean lines are not
  1069. invalidated as a result of these operations.
  1070. config ARM_ERRATA_720789
  1071. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1072. depends on CPU_V7 && SMP
  1073. help
  1074. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1075. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1076. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1077. As a consequence of this erratum, some TLB entries which should be
  1078. invalidated are not, resulting in an incoherency in the system page
  1079. tables. The workaround changes the TLB flushing routines to invalidate
  1080. entries regardless of the ASID.
  1081. config PL310_ERRATA_727915
  1082. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1083. depends on CACHE_L2X0
  1084. help
  1085. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1086. operation (offset 0x7FC). This operation runs in background so that
  1087. PL310 can handle normal accesses while it is in progress. Under very
  1088. rare circumstances, due to this erratum, write data can be lost when
  1089. PL310 treats a cacheable write transaction during a Clean &
  1090. Invalidate by Way operation.
  1091. config ARM_ERRATA_743622
  1092. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1093. depends on CPU_V7
  1094. help
  1095. This option enables the workaround for the 743622 Cortex-A9
  1096. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1097. optimisation in the Cortex-A9 Store Buffer may lead to data
  1098. corruption. This workaround sets a specific bit in the diagnostic
  1099. register of the Cortex-A9 which disables the Store Buffer
  1100. optimisation, preventing the defect from occurring. This has no
  1101. visible impact on the overall performance or power consumption of the
  1102. processor.
  1103. config ARM_ERRATA_751472
  1104. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1105. depends on CPU_V7 && SMP
  1106. help
  1107. This option enables the workaround for the 751472 Cortex-A9 (prior
  1108. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1109. completion of a following broadcasted operation if the second
  1110. operation is received by a CPU before the ICIALLUIS has completed,
  1111. potentially leading to corrupted entries in the cache or TLB.
  1112. config ARM_ERRATA_753970
  1113. bool "ARM errata: cache sync operation may be faulty"
  1114. depends on CACHE_PL310
  1115. help
  1116. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1117. Under some condition the effect of cache sync operation on
  1118. the store buffer still remains when the operation completes.
  1119. This means that the store buffer is always asked to drain and
  1120. this prevents it from merging any further writes. The workaround
  1121. is to replace the normal offset of cache sync operation (0x730)
  1122. by another offset targeting an unmapped PL310 register 0x740.
  1123. This has the same effect as the cache sync operation: store buffer
  1124. drain and waiting for all buffers empty.
  1125. config ARM_ERRATA_754322
  1126. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1127. depends on CPU_V7
  1128. help
  1129. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1130. r3p*) erratum. A speculative memory access may cause a page table walk
  1131. which starts prior to an ASID switch but completes afterwards. This
  1132. can populate the micro-TLB with a stale entry which may be hit with
  1133. the new ASID. This workaround places two dsb instructions in the mm
  1134. switching code so that no page table walks can cross the ASID switch.
  1135. config ARM_ERRATA_754327
  1136. bool "ARM errata: no automatic Store Buffer drain"
  1137. depends on CPU_V7 && SMP
  1138. help
  1139. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1140. r2p0) erratum. The Store Buffer does not have any automatic draining
  1141. mechanism and therefore a livelock may occur if an external agent
  1142. continuously polls a memory location waiting to observe an update.
  1143. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1144. written polling loops from denying visibility of updates to memory.
  1145. config ARM_ERRATA_364296
  1146. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1147. depends on CPU_V6 && !SMP
  1148. help
  1149. This options enables the workaround for the 364296 ARM1136
  1150. r0p2 erratum (possible cache data corruption with
  1151. hit-under-miss enabled). It sets the undocumented bit 31 in
  1152. the auxiliary control register and the FI bit in the control
  1153. register, thus disabling hit-under-miss without putting the
  1154. processor into full low interrupt latency mode. ARM11MPCore
  1155. is not affected.
  1156. config ARM_ERRATA_764369
  1157. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1158. depends on CPU_V7 && SMP
  1159. help
  1160. This option enables the workaround for erratum 764369
  1161. affecting Cortex-A9 MPCore with two or more processors (all
  1162. current revisions). Under certain timing circumstances, a data
  1163. cache line maintenance operation by MVA targeting an Inner
  1164. Shareable memory region may fail to proceed up to either the
  1165. Point of Coherency or to the Point of Unification of the
  1166. system. This workaround adds a DSB instruction before the
  1167. relevant cache maintenance functions and sets a specific bit
  1168. in the diagnostic control register of the SCU.
  1169. endmenu
  1170. source "arch/arm/common/Kconfig"
  1171. menu "Bus support"
  1172. config ARM_AMBA
  1173. bool
  1174. config ISA
  1175. bool
  1176. help
  1177. Find out whether you have ISA slots on your motherboard. ISA is the
  1178. name of a bus system, i.e. the way the CPU talks to the other stuff
  1179. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1180. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1181. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1182. # Select ISA DMA controller support
  1183. config ISA_DMA
  1184. bool
  1185. select ISA_DMA_API
  1186. # Select ISA DMA interface
  1187. config ISA_DMA_API
  1188. bool
  1189. config PCI
  1190. bool "PCI support" if MIGHT_HAVE_PCI
  1191. help
  1192. Find out whether you have a PCI motherboard. PCI is the name of a
  1193. bus system, i.e. the way the CPU talks to the other stuff inside
  1194. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1195. VESA. If you have PCI, say Y, otherwise N.
  1196. config PCI_DOMAINS
  1197. bool
  1198. depends on PCI
  1199. config PCI_NANOENGINE
  1200. bool "BSE nanoEngine PCI support"
  1201. depends on SA1100_NANOENGINE
  1202. help
  1203. Enable PCI on the BSE nanoEngine board.
  1204. config PCI_SYSCALL
  1205. def_bool PCI
  1206. # Select the host bridge type
  1207. config PCI_HOST_VIA82C505
  1208. bool
  1209. depends on PCI && ARCH_SHARK
  1210. default y
  1211. config PCI_HOST_ITE8152
  1212. bool
  1213. depends on PCI && MACH_ARMCORE
  1214. default y
  1215. select DMABOUNCE
  1216. source "drivers/pci/Kconfig"
  1217. source "drivers/pcmcia/Kconfig"
  1218. endmenu
  1219. menu "Kernel Features"
  1220. source "kernel/time/Kconfig"
  1221. config SMP
  1222. bool "Symmetric Multi-Processing"
  1223. depends on CPU_V6K || CPU_V7
  1224. depends on GENERIC_CLOCKEVENTS
  1225. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1226. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1227. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1228. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
  1229. select USE_GENERIC_SMP_HELPERS
  1230. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1231. help
  1232. This enables support for systems with more than one CPU. If you have
  1233. a system with only one CPU, like most personal computers, say N. If
  1234. you have a system with more than one CPU, say Y.
  1235. If you say N here, the kernel will run on single and multiprocessor
  1236. machines, but will use only one CPU of a multiprocessor machine. If
  1237. you say Y here, the kernel will run on many, but not all, single
  1238. processor machines. On a single processor machine, the kernel will
  1239. run faster if you say N here.
  1240. See also <file:Documentation/i386/IO-APIC.txt>,
  1241. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1242. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1243. If you don't know what to do here, say N.
  1244. config SMP_ON_UP
  1245. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1246. depends on EXPERIMENTAL
  1247. depends on SMP && !XIP_KERNEL
  1248. default y
  1249. help
  1250. SMP kernels contain instructions which fail on non-SMP processors.
  1251. Enabling this option allows the kernel to modify itself to make
  1252. these instructions safe. Disabling it allows about 1K of space
  1253. savings.
  1254. If you don't know what to do here, say Y.
  1255. config ARM_CPU_TOPOLOGY
  1256. bool "Support cpu topology definition"
  1257. depends on SMP && CPU_V7
  1258. default y
  1259. help
  1260. Support ARM cpu topology definition. The MPIDR register defines
  1261. affinity between processors which is then used to describe the cpu
  1262. topology of an ARM System.
  1263. config SCHED_MC
  1264. bool "Multi-core scheduler support"
  1265. depends on ARM_CPU_TOPOLOGY
  1266. help
  1267. Multi-core scheduler support improves the CPU scheduler's decision
  1268. making when dealing with multi-core CPU chips at a cost of slightly
  1269. increased overhead in some places. If unsure say N here.
  1270. config SCHED_SMT
  1271. bool "SMT scheduler support"
  1272. depends on ARM_CPU_TOPOLOGY
  1273. help
  1274. Improves the CPU scheduler's decision making when dealing with
  1275. MultiThreading at a cost of slightly increased overhead in some
  1276. places. If unsure say N here.
  1277. config HAVE_ARM_SCU
  1278. bool
  1279. help
  1280. This option enables support for the ARM system coherency unit
  1281. config HAVE_ARM_TWD
  1282. bool
  1283. depends on SMP
  1284. select TICK_ONESHOT
  1285. help
  1286. This options enables support for the ARM timer and watchdog unit
  1287. choice
  1288. prompt "Memory split"
  1289. default VMSPLIT_3G
  1290. help
  1291. Select the desired split between kernel and user memory.
  1292. If you are not absolutely sure what you are doing, leave this
  1293. option alone!
  1294. config VMSPLIT_3G
  1295. bool "3G/1G user/kernel split"
  1296. config VMSPLIT_2G
  1297. bool "2G/2G user/kernel split"
  1298. config VMSPLIT_1G
  1299. bool "1G/3G user/kernel split"
  1300. endchoice
  1301. config PAGE_OFFSET
  1302. hex
  1303. default 0x40000000 if VMSPLIT_1G
  1304. default 0x80000000 if VMSPLIT_2G
  1305. default 0xC0000000
  1306. config NR_CPUS
  1307. int "Maximum number of CPUs (2-32)"
  1308. range 2 32
  1309. depends on SMP
  1310. default "4"
  1311. config HOTPLUG_CPU
  1312. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1313. depends on SMP && HOTPLUG && EXPERIMENTAL
  1314. help
  1315. Say Y here to experiment with turning CPUs off and on. CPUs
  1316. can be controlled through /sys/devices/system/cpu.
  1317. config LOCAL_TIMERS
  1318. bool "Use local timer interrupts"
  1319. depends on SMP
  1320. default y
  1321. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1322. help
  1323. Enable support for local timers on SMP platforms, rather then the
  1324. legacy IPI broadcast method. Local timers allows the system
  1325. accounting to be spread across the timer interval, preventing a
  1326. "thundering herd" at every timer tick.
  1327. source kernel/Kconfig.preempt
  1328. config HZ
  1329. int
  1330. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1331. ARCH_S5PV210 || ARCH_EXYNOS4
  1332. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1333. default AT91_TIMER_HZ if ARCH_AT91
  1334. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1335. default 100
  1336. config THUMB2_KERNEL
  1337. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1338. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1339. select AEABI
  1340. select ARM_ASM_UNIFIED
  1341. help
  1342. By enabling this option, the kernel will be compiled in
  1343. Thumb-2 mode. A compiler/assembler that understand the unified
  1344. ARM-Thumb syntax is needed.
  1345. If unsure, say N.
  1346. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1347. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1348. depends on THUMB2_KERNEL && MODULES
  1349. default y
  1350. help
  1351. Various binutils versions can resolve Thumb-2 branches to
  1352. locally-defined, preemptible global symbols as short-range "b.n"
  1353. branch instructions.
  1354. This is a problem, because there's no guarantee the final
  1355. destination of the symbol, or any candidate locations for a
  1356. trampoline, are within range of the branch. For this reason, the
  1357. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1358. relocation in modules at all, and it makes little sense to add
  1359. support.
  1360. The symptom is that the kernel fails with an "unsupported
  1361. relocation" error when loading some modules.
  1362. Until fixed tools are available, passing
  1363. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1364. code which hits this problem, at the cost of a bit of extra runtime
  1365. stack usage in some cases.
  1366. The problem is described in more detail at:
  1367. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1368. Only Thumb-2 kernels are affected.
  1369. Unless you are sure your tools don't have this problem, say Y.
  1370. config ARM_ASM_UNIFIED
  1371. bool
  1372. config AEABI
  1373. bool "Use the ARM EABI to compile the kernel"
  1374. help
  1375. This option allows for the kernel to be compiled using the latest
  1376. ARM ABI (aka EABI). This is only useful if you are using a user
  1377. space environment that is also compiled with EABI.
  1378. Since there are major incompatibilities between the legacy ABI and
  1379. EABI, especially with regard to structure member alignment, this
  1380. option also changes the kernel syscall calling convention to
  1381. disambiguate both ABIs and allow for backward compatibility support
  1382. (selected with CONFIG_OABI_COMPAT).
  1383. To use this you need GCC version 4.0.0 or later.
  1384. config OABI_COMPAT
  1385. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1386. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1387. default y
  1388. help
  1389. This option preserves the old syscall interface along with the
  1390. new (ARM EABI) one. It also provides a compatibility layer to
  1391. intercept syscalls that have structure arguments which layout
  1392. in memory differs between the legacy ABI and the new ARM EABI
  1393. (only for non "thumb" binaries). This option adds a tiny
  1394. overhead to all syscalls and produces a slightly larger kernel.
  1395. If you know you'll be using only pure EABI user space then you
  1396. can say N here. If this option is not selected and you attempt
  1397. to execute a legacy ABI binary then the result will be
  1398. UNPREDICTABLE (in fact it can be predicted that it won't work
  1399. at all). If in doubt say Y.
  1400. config ARCH_HAS_HOLES_MEMORYMODEL
  1401. bool
  1402. config ARCH_SPARSEMEM_ENABLE
  1403. bool
  1404. config ARCH_SPARSEMEM_DEFAULT
  1405. def_bool ARCH_SPARSEMEM_ENABLE
  1406. config ARCH_SELECT_MEMORY_MODEL
  1407. def_bool ARCH_SPARSEMEM_ENABLE
  1408. config HAVE_ARCH_PFN_VALID
  1409. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1410. config HIGHMEM
  1411. bool "High Memory Support"
  1412. depends on MMU
  1413. help
  1414. The address space of ARM processors is only 4 Gigabytes large
  1415. and it has to accommodate user address space, kernel address
  1416. space as well as some memory mapped IO. That means that, if you
  1417. have a large amount of physical memory and/or IO, not all of the
  1418. memory can be "permanently mapped" by the kernel. The physical
  1419. memory that is not permanently mapped is called "high memory".
  1420. Depending on the selected kernel/user memory split, minimum
  1421. vmalloc space and actual amount of RAM, you may not need this
  1422. option which should result in a slightly faster kernel.
  1423. If unsure, say n.
  1424. config HIGHPTE
  1425. bool "Allocate 2nd-level pagetables from highmem"
  1426. depends on HIGHMEM
  1427. config HW_PERF_EVENTS
  1428. bool "Enable hardware performance counter support for perf events"
  1429. depends on PERF_EVENTS && CPU_HAS_PMU
  1430. default y
  1431. help
  1432. Enable hardware performance counter support for perf events. If
  1433. disabled, perf events will use software events only.
  1434. source "mm/Kconfig"
  1435. config FORCE_MAX_ZONEORDER
  1436. int "Maximum zone order" if ARCH_SHMOBILE
  1437. range 11 64 if ARCH_SHMOBILE
  1438. default "9" if SA1111
  1439. default "11"
  1440. help
  1441. The kernel memory allocator divides physically contiguous memory
  1442. blocks into "zones", where each zone is a power of two number of
  1443. pages. This option selects the largest power of two that the kernel
  1444. keeps in the memory allocator. If you need to allocate very large
  1445. blocks of physically contiguous memory, then you may need to
  1446. increase this value.
  1447. This config option is actually maximum order plus one. For example,
  1448. a value of 11 means that the largest free memory block is 2^10 pages.
  1449. config LEDS
  1450. bool "Timer and CPU usage LEDs"
  1451. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1452. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1453. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1454. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1455. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1456. ARCH_AT91 || ARCH_DAVINCI || \
  1457. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1458. help
  1459. If you say Y here, the LEDs on your machine will be used
  1460. to provide useful information about your current system status.
  1461. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1462. be able to select which LEDs are active using the options below. If
  1463. you are compiling a kernel for the EBSA-110 or the LART however, the
  1464. red LED will simply flash regularly to indicate that the system is
  1465. still functional. It is safe to say Y here if you have a CATS
  1466. system, but the driver will do nothing.
  1467. config LEDS_TIMER
  1468. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1469. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1470. || MACH_OMAP_PERSEUS2
  1471. depends on LEDS
  1472. depends on !GENERIC_CLOCKEVENTS
  1473. default y if ARCH_EBSA110
  1474. help
  1475. If you say Y here, one of the system LEDs (the green one on the
  1476. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1477. will flash regularly to indicate that the system is still
  1478. operational. This is mainly useful to kernel hackers who are
  1479. debugging unstable kernels.
  1480. The LART uses the same LED for both Timer LED and CPU usage LED
  1481. functions. You may choose to use both, but the Timer LED function
  1482. will overrule the CPU usage LED.
  1483. config LEDS_CPU
  1484. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1485. !ARCH_OMAP) \
  1486. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1487. || MACH_OMAP_PERSEUS2
  1488. depends on LEDS
  1489. help
  1490. If you say Y here, the red LED will be used to give a good real
  1491. time indication of CPU usage, by lighting whenever the idle task
  1492. is not currently executing.
  1493. The LART uses the same LED for both Timer LED and CPU usage LED
  1494. functions. You may choose to use both, but the Timer LED function
  1495. will overrule the CPU usage LED.
  1496. config ALIGNMENT_TRAP
  1497. bool
  1498. depends on CPU_CP15_MMU
  1499. default y if !ARCH_EBSA110
  1500. select HAVE_PROC_CPU if PROC_FS
  1501. help
  1502. ARM processors cannot fetch/store information which is not
  1503. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1504. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1505. fetch/store instructions will be emulated in software if you say
  1506. here, which has a severe performance impact. This is necessary for
  1507. correct operation of some network protocols. With an IP-only
  1508. configuration it is safe to say N, otherwise say Y.
  1509. config UACCESS_WITH_MEMCPY
  1510. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1511. depends on MMU && EXPERIMENTAL
  1512. default y if CPU_FEROCEON
  1513. help
  1514. Implement faster copy_to_user and clear_user methods for CPU
  1515. cores where a 8-word STM instruction give significantly higher
  1516. memory write throughput than a sequence of individual 32bit stores.
  1517. A possible side effect is a slight increase in scheduling latency
  1518. between threads sharing the same address space if they invoke
  1519. such copy operations with large buffers.
  1520. However, if the CPU data cache is using a write-allocate mode,
  1521. this option is unlikely to provide any performance gain.
  1522. config SECCOMP
  1523. bool
  1524. prompt "Enable seccomp to safely compute untrusted bytecode"
  1525. ---help---
  1526. This kernel feature is useful for number crunching applications
  1527. that may need to compute untrusted bytecode during their
  1528. execution. By using pipes or other transports made available to
  1529. the process as file descriptors supporting the read/write
  1530. syscalls, it's possible to isolate those applications in
  1531. their own address space using seccomp. Once seccomp is
  1532. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1533. and the task is only allowed to execute a few safe syscalls
  1534. defined by each seccomp mode.
  1535. config CC_STACKPROTECTOR
  1536. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1537. depends on EXPERIMENTAL
  1538. help
  1539. This option turns on the -fstack-protector GCC feature. This
  1540. feature puts, at the beginning of functions, a canary value on
  1541. the stack just before the return address, and validates
  1542. the value just before actually returning. Stack based buffer
  1543. overflows (that need to overwrite this return address) now also
  1544. overwrite the canary, which gets detected and the attack is then
  1545. neutralized via a kernel panic.
  1546. This feature requires gcc version 4.2 or above.
  1547. config DEPRECATED_PARAM_STRUCT
  1548. bool "Provide old way to pass kernel parameters"
  1549. help
  1550. This was deprecated in 2001 and announced to live on for 5 years.
  1551. Some old boot loaders still use this way.
  1552. endmenu
  1553. menu "Boot options"
  1554. config USE_OF
  1555. bool "Flattened Device Tree support"
  1556. select OF
  1557. select OF_EARLY_FLATTREE
  1558. select IRQ_DOMAIN
  1559. help
  1560. Include support for flattened device tree machine descriptions.
  1561. # Compressed boot loader in ROM. Yes, we really want to ask about
  1562. # TEXT and BSS so we preserve their values in the config files.
  1563. config ZBOOT_ROM_TEXT
  1564. hex "Compressed ROM boot loader base address"
  1565. default "0"
  1566. help
  1567. The physical address at which the ROM-able zImage is to be
  1568. placed in the target. Platforms which normally make use of
  1569. ROM-able zImage formats normally set this to a suitable
  1570. value in their defconfig file.
  1571. If ZBOOT_ROM is not enabled, this has no effect.
  1572. config ZBOOT_ROM_BSS
  1573. hex "Compressed ROM boot loader BSS address"
  1574. default "0"
  1575. help
  1576. The base address of an area of read/write memory in the target
  1577. for the ROM-able zImage which must be available while the
  1578. decompressor is running. It must be large enough to hold the
  1579. entire decompressed kernel plus an additional 128 KiB.
  1580. Platforms which normally make use of ROM-able zImage formats
  1581. normally set this to a suitable value in their defconfig file.
  1582. If ZBOOT_ROM is not enabled, this has no effect.
  1583. config ZBOOT_ROM
  1584. bool "Compressed boot loader in ROM/flash"
  1585. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1586. help
  1587. Say Y here if you intend to execute your compressed kernel image
  1588. (zImage) directly from ROM or flash. If unsure, say N.
  1589. choice
  1590. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1591. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1592. default ZBOOT_ROM_NONE
  1593. help
  1594. Include experimental SD/MMC loading code in the ROM-able zImage.
  1595. With this enabled it is possible to write the the ROM-able zImage
  1596. kernel image to an MMC or SD card and boot the kernel straight
  1597. from the reset vector. At reset the processor Mask ROM will load
  1598. the first part of the the ROM-able zImage which in turn loads the
  1599. rest the kernel image to RAM.
  1600. config ZBOOT_ROM_NONE
  1601. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1602. help
  1603. Do not load image from SD or MMC
  1604. config ZBOOT_ROM_MMCIF
  1605. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1606. help
  1607. Load image from MMCIF hardware block.
  1608. config ZBOOT_ROM_SH_MOBILE_SDHI
  1609. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1610. help
  1611. Load image from SDHI hardware block
  1612. endchoice
  1613. config ARM_APPENDED_DTB
  1614. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1615. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1616. help
  1617. With this option, the boot code will look for a device tree binary
  1618. (DTB) appended to zImage
  1619. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1620. This is meant as a backward compatibility convenience for those
  1621. systems with a bootloader that can't be upgraded to accommodate
  1622. the documented boot protocol using a device tree.
  1623. Beware that there is very little in terms of protection against
  1624. this option being confused by leftover garbage in memory that might
  1625. look like a DTB header after a reboot if no actual DTB is appended
  1626. to zImage. Do not leave this option active in a production kernel
  1627. if you don't intend to always append a DTB. Proper passing of the
  1628. location into r2 of a bootloader provided DTB is always preferable
  1629. to this option.
  1630. config ARM_ATAG_DTB_COMPAT
  1631. bool "Supplement the appended DTB with traditional ATAG information"
  1632. depends on ARM_APPENDED_DTB
  1633. help
  1634. Some old bootloaders can't be updated to a DTB capable one, yet
  1635. they provide ATAGs with memory configuration, the ramdisk address,
  1636. the kernel cmdline string, etc. Such information is dynamically
  1637. provided by the bootloader and can't always be stored in a static
  1638. DTB. To allow a device tree enabled kernel to be used with such
  1639. bootloaders, this option allows zImage to extract the information
  1640. from the ATAG list and store it at run time into the appended DTB.
  1641. config CMDLINE
  1642. string "Default kernel command string"
  1643. default ""
  1644. help
  1645. On some architectures (EBSA110 and CATS), there is currently no way
  1646. for the boot loader to pass arguments to the kernel. For these
  1647. architectures, you should supply some command-line options at build
  1648. time by entering them here. As a minimum, you should specify the
  1649. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1650. choice
  1651. prompt "Kernel command line type" if CMDLINE != ""
  1652. default CMDLINE_FROM_BOOTLOADER
  1653. config CMDLINE_FROM_BOOTLOADER
  1654. bool "Use bootloader kernel arguments if available"
  1655. help
  1656. Uses the command-line options passed by the boot loader. If
  1657. the boot loader doesn't provide any, the default kernel command
  1658. string provided in CMDLINE will be used.
  1659. config CMDLINE_EXTEND
  1660. bool "Extend bootloader kernel arguments"
  1661. help
  1662. The command-line arguments provided by the boot loader will be
  1663. appended to the default kernel command string.
  1664. config CMDLINE_FORCE
  1665. bool "Always use the default kernel command string"
  1666. help
  1667. Always use the default kernel command string, even if the boot
  1668. loader passes other arguments to the kernel.
  1669. This is useful if you cannot or don't want to change the
  1670. command-line options your boot loader passes to the kernel.
  1671. endchoice
  1672. config XIP_KERNEL
  1673. bool "Kernel Execute-In-Place from ROM"
  1674. depends on !ZBOOT_ROM
  1675. help
  1676. Execute-In-Place allows the kernel to run from non-volatile storage
  1677. directly addressable by the CPU, such as NOR flash. This saves RAM
  1678. space since the text section of the kernel is not loaded from flash
  1679. to RAM. Read-write sections, such as the data section and stack,
  1680. are still copied to RAM. The XIP kernel is not compressed since
  1681. it has to run directly from flash, so it will take more space to
  1682. store it. The flash address used to link the kernel object files,
  1683. and for storing it, is configuration dependent. Therefore, if you
  1684. say Y here, you must know the proper physical address where to
  1685. store the kernel image depending on your own flash memory usage.
  1686. Also note that the make target becomes "make xipImage" rather than
  1687. "make zImage" or "make Image". The final kernel binary to put in
  1688. ROM memory will be arch/arm/boot/xipImage.
  1689. If unsure, say N.
  1690. config XIP_PHYS_ADDR
  1691. hex "XIP Kernel Physical Location"
  1692. depends on XIP_KERNEL
  1693. default "0x00080000"
  1694. help
  1695. This is the physical address in your flash memory the kernel will
  1696. be linked for and stored to. This address is dependent on your
  1697. own flash usage.
  1698. config KEXEC
  1699. bool "Kexec system call (EXPERIMENTAL)"
  1700. depends on EXPERIMENTAL
  1701. help
  1702. kexec is a system call that implements the ability to shutdown your
  1703. current kernel, and to start another kernel. It is like a reboot
  1704. but it is independent of the system firmware. And like a reboot
  1705. you can start any kernel with it, not just Linux.
  1706. It is an ongoing process to be certain the hardware in a machine
  1707. is properly shutdown, so do not be surprised if this code does not
  1708. initially work for you. It may help to enable device hotplugging
  1709. support.
  1710. config ATAGS_PROC
  1711. bool "Export atags in procfs"
  1712. depends on KEXEC
  1713. default y
  1714. help
  1715. Should the atags used to boot the kernel be exported in an "atags"
  1716. file in procfs. Useful with kexec.
  1717. config CRASH_DUMP
  1718. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1719. depends on EXPERIMENTAL
  1720. help
  1721. Generate crash dump after being started by kexec. This should
  1722. be normally only set in special crash dump kernels which are
  1723. loaded in the main kernel with kexec-tools into a specially
  1724. reserved region and then later executed after a crash by
  1725. kdump/kexec. The crash dump kernel must be compiled to a
  1726. memory address not used by the main kernel
  1727. For more details see Documentation/kdump/kdump.txt
  1728. config AUTO_ZRELADDR
  1729. bool "Auto calculation of the decompressed kernel image address"
  1730. depends on !ZBOOT_ROM && !ARCH_U300
  1731. help
  1732. ZRELADDR is the physical address where the decompressed kernel
  1733. image will be placed. If AUTO_ZRELADDR is selected, the address
  1734. will be determined at run-time by masking the current IP with
  1735. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1736. from start of memory.
  1737. endmenu
  1738. menu "CPU Power Management"
  1739. if ARCH_HAS_CPUFREQ
  1740. source "drivers/cpufreq/Kconfig"
  1741. config CPU_FREQ_IMX
  1742. tristate "CPUfreq driver for i.MX CPUs"
  1743. depends on ARCH_MXC && CPU_FREQ
  1744. help
  1745. This enables the CPUfreq driver for i.MX CPUs.
  1746. config CPU_FREQ_SA1100
  1747. bool
  1748. config CPU_FREQ_SA1110
  1749. bool
  1750. config CPU_FREQ_INTEGRATOR
  1751. tristate "CPUfreq driver for ARM Integrator CPUs"
  1752. depends on ARCH_INTEGRATOR && CPU_FREQ
  1753. default y
  1754. help
  1755. This enables the CPUfreq driver for ARM Integrator CPUs.
  1756. For details, take a look at <file:Documentation/cpu-freq>.
  1757. If in doubt, say Y.
  1758. config CPU_FREQ_PXA
  1759. bool
  1760. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1761. default y
  1762. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1763. config CPU_FREQ_S3C
  1764. bool
  1765. help
  1766. Internal configuration node for common cpufreq on Samsung SoC
  1767. config CPU_FREQ_S3C24XX
  1768. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1769. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1770. select CPU_FREQ_S3C
  1771. help
  1772. This enables the CPUfreq driver for the Samsung S3C24XX family
  1773. of CPUs.
  1774. For details, take a look at <file:Documentation/cpu-freq>.
  1775. If in doubt, say N.
  1776. config CPU_FREQ_S3C24XX_PLL
  1777. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1778. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1779. help
  1780. Compile in support for changing the PLL frequency from the
  1781. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1782. after a frequency change, so by default it is not enabled.
  1783. This also means that the PLL tables for the selected CPU(s) will
  1784. be built which may increase the size of the kernel image.
  1785. config CPU_FREQ_S3C24XX_DEBUG
  1786. bool "Debug CPUfreq Samsung driver core"
  1787. depends on CPU_FREQ_S3C24XX
  1788. help
  1789. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1790. config CPU_FREQ_S3C24XX_IODEBUG
  1791. bool "Debug CPUfreq Samsung driver IO timing"
  1792. depends on CPU_FREQ_S3C24XX
  1793. help
  1794. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1795. config CPU_FREQ_S3C24XX_DEBUGFS
  1796. bool "Export debugfs for CPUFreq"
  1797. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1798. help
  1799. Export status information via debugfs.
  1800. endif
  1801. source "drivers/cpuidle/Kconfig"
  1802. endmenu
  1803. menu "Floating point emulation"
  1804. comment "At least one emulation must be selected"
  1805. config FPE_NWFPE
  1806. bool "NWFPE math emulation"
  1807. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1808. ---help---
  1809. Say Y to include the NWFPE floating point emulator in the kernel.
  1810. This is necessary to run most binaries. Linux does not currently
  1811. support floating point hardware so you need to say Y here even if
  1812. your machine has an FPA or floating point co-processor podule.
  1813. You may say N here if you are going to load the Acorn FPEmulator
  1814. early in the bootup.
  1815. config FPE_NWFPE_XP
  1816. bool "Support extended precision"
  1817. depends on FPE_NWFPE
  1818. help
  1819. Say Y to include 80-bit support in the kernel floating-point
  1820. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1821. Note that gcc does not generate 80-bit operations by default,
  1822. so in most cases this option only enlarges the size of the
  1823. floating point emulator without any good reason.
  1824. You almost surely want to say N here.
  1825. config FPE_FASTFPE
  1826. bool "FastFPE math emulation (EXPERIMENTAL)"
  1827. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1828. ---help---
  1829. Say Y here to include the FAST floating point emulator in the kernel.
  1830. This is an experimental much faster emulator which now also has full
  1831. precision for the mantissa. It does not support any exceptions.
  1832. It is very simple, and approximately 3-6 times faster than NWFPE.
  1833. It should be sufficient for most programs. It may be not suitable
  1834. for scientific calculations, but you have to check this for yourself.
  1835. If you do not feel you need a faster FP emulation you should better
  1836. choose NWFPE.
  1837. config VFP
  1838. bool "VFP-format floating point maths"
  1839. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1840. help
  1841. Say Y to include VFP support code in the kernel. This is needed
  1842. if your hardware includes a VFP unit.
  1843. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1844. release notes and additional status information.
  1845. Say N if your target does not have VFP hardware.
  1846. config VFPv3
  1847. bool
  1848. depends on VFP
  1849. default y if CPU_V7
  1850. config NEON
  1851. bool "Advanced SIMD (NEON) Extension support"
  1852. depends on VFPv3 && CPU_V7
  1853. help
  1854. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1855. Extension.
  1856. endmenu
  1857. menu "Userspace binary formats"
  1858. source "fs/Kconfig.binfmt"
  1859. config ARTHUR
  1860. tristate "RISC OS personality"
  1861. depends on !AEABI
  1862. help
  1863. Say Y here to include the kernel code necessary if you want to run
  1864. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1865. experimental; if this sounds frightening, say N and sleep in peace.
  1866. You can also say M here to compile this support as a module (which
  1867. will be called arthur).
  1868. endmenu
  1869. menu "Power management options"
  1870. source "kernel/power/Kconfig"
  1871. config ARCH_SUSPEND_POSSIBLE
  1872. depends on !ARCH_S5P64X0 && !ARCH_S5PC100
  1873. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1874. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1875. def_bool y
  1876. endmenu
  1877. source "net/Kconfig"
  1878. source "drivers/Kconfig"
  1879. source "fs/Kconfig"
  1880. source "arch/arm/Kconfig.debug"
  1881. source "security/Kconfig"
  1882. source "crypto/Kconfig"
  1883. source "lib/Kconfig"