Kconfig 65 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_KPROBES if !XIP_KERNEL
  15. select HAVE_KRETPROBES if (HAVE_KPROBES)
  16. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  17. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  18. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  19. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  20. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  21. select HAVE_GENERIC_DMA_COHERENT
  22. select HAVE_KERNEL_GZIP
  23. select HAVE_KERNEL_LZO
  24. select HAVE_KERNEL_LZMA
  25. select HAVE_KERNEL_XZ
  26. select HAVE_IRQ_WORK
  27. select HAVE_PERF_EVENTS
  28. select PERF_USE_VMALLOC
  29. select HAVE_REGS_AND_STACK_ACCESS_API
  30. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  31. select HAVE_C_RECORDMCOUNT
  32. select HAVE_GENERIC_HARDIRQS
  33. select HAVE_SPARSE_IRQ
  34. select GENERIC_IRQ_SHOW
  35. select CPU_PM if (SUSPEND || CPU_IDLE)
  36. select GENERIC_PCI_IOMAP
  37. select HAVE_BPF_JIT if NET
  38. help
  39. The ARM series is a line of low-power-consumption RISC chip designs
  40. licensed by ARM Ltd and targeted at embedded applications and
  41. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  42. manufactured, but legacy ARM-based PC hardware remains popular in
  43. Europe. There is an ARM Linux project with a web page at
  44. <http://www.arm.linux.org.uk/>.
  45. config ARM_HAS_SG_CHAIN
  46. bool
  47. config HAVE_PWM
  48. bool
  49. config MIGHT_HAVE_PCI
  50. bool
  51. config SYS_SUPPORTS_APM_EMULATION
  52. bool
  53. config HAVE_SCHED_CLOCK
  54. bool
  55. config GENERIC_GPIO
  56. bool
  57. config ARCH_USES_GETTIMEOFFSET
  58. bool
  59. default n
  60. config GENERIC_CLOCKEVENTS
  61. bool
  62. config GENERIC_CLOCKEVENTS_BROADCAST
  63. bool
  64. depends on GENERIC_CLOCKEVENTS
  65. default y if SMP
  66. config KTIME_SCALAR
  67. bool
  68. default y
  69. config HAVE_TCM
  70. bool
  71. select GENERIC_ALLOCATOR
  72. config HAVE_PROC_CPU
  73. bool
  74. config NO_IOPORT
  75. bool
  76. config EISA
  77. bool
  78. ---help---
  79. The Extended Industry Standard Architecture (EISA) bus was
  80. developed as an open alternative to the IBM MicroChannel bus.
  81. The EISA bus provided some of the features of the IBM MicroChannel
  82. bus while maintaining backward compatibility with cards made for
  83. the older ISA bus. The EISA bus saw limited use between 1988 and
  84. 1995 when it was made obsolete by the PCI bus.
  85. Say Y here if you are building a kernel for an EISA-based machine.
  86. Otherwise, say N.
  87. config SBUS
  88. bool
  89. config MCA
  90. bool
  91. help
  92. MicroChannel Architecture is found in some IBM PS/2 machines and
  93. laptops. It is a bus system similar to PCI or ISA. See
  94. <file:Documentation/mca.txt> (and especially the web page given
  95. there) before attempting to build an MCA bus kernel.
  96. config STACKTRACE_SUPPORT
  97. bool
  98. default y
  99. config HAVE_LATENCYTOP_SUPPORT
  100. bool
  101. depends on !SMP
  102. default y
  103. config LOCKDEP_SUPPORT
  104. bool
  105. default y
  106. config TRACE_IRQFLAGS_SUPPORT
  107. bool
  108. default y
  109. config HARDIRQS_SW_RESEND
  110. bool
  111. default y
  112. config GENERIC_IRQ_PROBE
  113. bool
  114. default y
  115. config GENERIC_LOCKBREAK
  116. bool
  117. default y
  118. depends on SMP && PREEMPT
  119. config RWSEM_GENERIC_SPINLOCK
  120. bool
  121. default y
  122. config RWSEM_XCHGADD_ALGORITHM
  123. bool
  124. config ARCH_HAS_ILOG2_U32
  125. bool
  126. config ARCH_HAS_ILOG2_U64
  127. bool
  128. config ARCH_HAS_CPUFREQ
  129. bool
  130. help
  131. Internal node to signify that the ARCH has CPUFREQ support
  132. and that the relevant menu configurations are displayed for
  133. it.
  134. config ARCH_HAS_CPU_IDLE_WAIT
  135. def_bool y
  136. config GENERIC_HWEIGHT
  137. bool
  138. default y
  139. config GENERIC_CALIBRATE_DELAY
  140. bool
  141. default y
  142. config ARCH_MAY_HAVE_PC_FDC
  143. bool
  144. config ZONE_DMA
  145. bool
  146. config NEED_DMA_MAP_STATE
  147. def_bool y
  148. config GENERIC_ISA_DMA
  149. bool
  150. config FIQ
  151. bool
  152. config ARCH_MTD_XIP
  153. bool
  154. config VECTORS_BASE
  155. hex
  156. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  157. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  158. default 0x00000000
  159. help
  160. The base address of exception vectors.
  161. config ARM_PATCH_PHYS_VIRT
  162. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  163. default y
  164. depends on !XIP_KERNEL && MMU
  165. depends on !ARCH_REALVIEW || !SPARSEMEM
  166. help
  167. Patch phys-to-virt and virt-to-phys translation functions at
  168. boot and module load time according to the position of the
  169. kernel in system memory.
  170. This can only be used with non-XIP MMU kernels where the base
  171. of physical memory is at a 16MB boundary.
  172. Only disable this option if you know that you do not require
  173. this feature (eg, building a kernel for a single machine) and
  174. you need to shrink the kernel to the minimal size.
  175. config NEED_MACH_MEMORY_H
  176. bool
  177. help
  178. Select this when mach/memory.h is required to provide special
  179. definitions for this platform. The need for mach/memory.h should
  180. be avoided when possible.
  181. config PHYS_OFFSET
  182. hex "Physical address of main memory" if MMU
  183. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  184. default DRAM_BASE if !MMU
  185. help
  186. Please provide the physical address corresponding to the
  187. location of main memory in your system.
  188. config GENERIC_BUG
  189. def_bool y
  190. depends on BUG
  191. source "init/Kconfig"
  192. source "kernel/Kconfig.freezer"
  193. menu "System Type"
  194. config MMU
  195. bool "MMU-based Paged Memory Management Support"
  196. default y
  197. help
  198. Select if you want MMU-based virtualised addressing space
  199. support by paged memory management. If unsure, say 'Y'.
  200. #
  201. # The "ARM system type" choice list is ordered alphabetically by option
  202. # text. Please add new entries in the option alphabetic order.
  203. #
  204. choice
  205. prompt "ARM system type"
  206. default ARCH_VERSATILE
  207. config ARCH_INTEGRATOR
  208. bool "ARM Ltd. Integrator family"
  209. select ARM_AMBA
  210. select ARCH_HAS_CPUFREQ
  211. select CLKDEV_LOOKUP
  212. select HAVE_MACH_CLKDEV
  213. select HAVE_TCM
  214. select ICST
  215. select GENERIC_CLOCKEVENTS
  216. select PLAT_VERSATILE
  217. select PLAT_VERSATILE_FPGA_IRQ
  218. select NEED_MACH_MEMORY_H
  219. select SPARSE_IRQ
  220. help
  221. Support for ARM's Integrator platform.
  222. config ARCH_REALVIEW
  223. bool "ARM Ltd. RealView family"
  224. select ARM_AMBA
  225. select CLKDEV_LOOKUP
  226. select HAVE_MACH_CLKDEV
  227. select ICST
  228. select GENERIC_CLOCKEVENTS
  229. select ARCH_WANT_OPTIONAL_GPIOLIB
  230. select PLAT_VERSATILE
  231. select PLAT_VERSATILE_CLCD
  232. select ARM_TIMER_SP804
  233. select GPIO_PL061 if GPIOLIB
  234. select NEED_MACH_MEMORY_H
  235. help
  236. This enables support for ARM Ltd RealView boards.
  237. config ARCH_VERSATILE
  238. bool "ARM Ltd. Versatile family"
  239. select ARM_AMBA
  240. select ARM_VIC
  241. select CLKDEV_LOOKUP
  242. select HAVE_MACH_CLKDEV
  243. select ICST
  244. select GENERIC_CLOCKEVENTS
  245. select ARCH_WANT_OPTIONAL_GPIOLIB
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLCD
  248. select PLAT_VERSATILE_FPGA_IRQ
  249. select ARM_TIMER_SP804
  250. help
  251. This enables support for ARM Ltd Versatile board.
  252. config ARCH_VEXPRESS
  253. bool "ARM Ltd. Versatile Express family"
  254. select ARCH_WANT_OPTIONAL_GPIOLIB
  255. select ARM_AMBA
  256. select ARM_TIMER_SP804
  257. select CLKDEV_LOOKUP
  258. select HAVE_MACH_CLKDEV
  259. select GENERIC_CLOCKEVENTS
  260. select HAVE_CLK
  261. select HAVE_PATA_PLATFORM
  262. select ICST
  263. select NO_IOPORT
  264. select PLAT_VERSATILE
  265. select PLAT_VERSATILE_CLCD
  266. help
  267. This enables support for the ARM Ltd Versatile Express boards.
  268. config ARCH_AT91
  269. bool "Atmel AT91"
  270. select ARCH_REQUIRE_GPIOLIB
  271. select HAVE_CLK
  272. select CLKDEV_LOOKUP
  273. help
  274. This enables support for systems based on the Atmel AT91RM9200,
  275. AT91SAM9 and AT91CAP9 processors.
  276. config ARCH_BCMRING
  277. bool "Broadcom BCMRING"
  278. depends on MMU
  279. select CPU_V6
  280. select ARM_AMBA
  281. select ARM_TIMER_SP804
  282. select CLKDEV_LOOKUP
  283. select GENERIC_CLOCKEVENTS
  284. select ARCH_WANT_OPTIONAL_GPIOLIB
  285. help
  286. Support for Broadcom's BCMRing platform.
  287. config ARCH_HIGHBANK
  288. bool "Calxeda Highbank-based"
  289. select ARCH_WANT_OPTIONAL_GPIOLIB
  290. select ARM_AMBA
  291. select ARM_GIC
  292. select ARM_TIMER_SP804
  293. select CACHE_L2X0
  294. select CLKDEV_LOOKUP
  295. select CPU_V7
  296. select GENERIC_CLOCKEVENTS
  297. select HAVE_ARM_SCU
  298. select HAVE_SMP
  299. select USE_OF
  300. help
  301. Support for the Calxeda Highbank SoC based boards.
  302. config ARCH_CLPS711X
  303. bool "Cirrus Logic CLPS711x/EP721x-based"
  304. select CPU_ARM720T
  305. select ARCH_USES_GETTIMEOFFSET
  306. select NEED_MACH_MEMORY_H
  307. help
  308. Support for Cirrus Logic 711x/721x based boards.
  309. config ARCH_CNS3XXX
  310. bool "Cavium Networks CNS3XXX family"
  311. select CPU_V6K
  312. select GENERIC_CLOCKEVENTS
  313. select ARM_GIC
  314. select MIGHT_HAVE_CACHE_L2X0
  315. select MIGHT_HAVE_PCI
  316. select PCI_DOMAINS if PCI
  317. help
  318. Support for Cavium Networks CNS3XXX platform.
  319. config ARCH_GEMINI
  320. bool "Cortina Systems Gemini"
  321. select CPU_FA526
  322. select ARCH_REQUIRE_GPIOLIB
  323. select ARCH_USES_GETTIMEOFFSET
  324. help
  325. Support for the Cortina Systems Gemini family SoCs
  326. config ARCH_PRIMA2
  327. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  328. select CPU_V7
  329. select NO_IOPORT
  330. select GENERIC_CLOCKEVENTS
  331. select CLKDEV_LOOKUP
  332. select GENERIC_IRQ_CHIP
  333. select MIGHT_HAVE_CACHE_L2X0
  334. select USE_OF
  335. select ZONE_DMA
  336. help
  337. Support for CSR SiRFSoC ARM Cortex A9 Platform
  338. config ARCH_EBSA110
  339. bool "EBSA-110"
  340. select CPU_SA110
  341. select ISA
  342. select NO_IOPORT
  343. select ARCH_USES_GETTIMEOFFSET
  344. select NEED_MACH_MEMORY_H
  345. help
  346. This is an evaluation board for the StrongARM processor available
  347. from Digital. It has limited hardware on-board, including an
  348. Ethernet interface, two PCMCIA sockets, two serial ports and a
  349. parallel port.
  350. config ARCH_EP93XX
  351. bool "EP93xx-based"
  352. select CPU_ARM920T
  353. select ARM_AMBA
  354. select ARM_VIC
  355. select CLKDEV_LOOKUP
  356. select ARCH_REQUIRE_GPIOLIB
  357. select ARCH_HAS_HOLES_MEMORYMODEL
  358. select ARCH_USES_GETTIMEOFFSET
  359. select NEED_MACH_MEMORY_H
  360. help
  361. This enables support for the Cirrus EP93xx series of CPUs.
  362. config ARCH_FOOTBRIDGE
  363. bool "FootBridge"
  364. select CPU_SA110
  365. select FOOTBRIDGE
  366. select GENERIC_CLOCKEVENTS
  367. select HAVE_IDE
  368. select NEED_MACH_MEMORY_H
  369. help
  370. Support for systems based on the DC21285 companion chip
  371. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  372. config ARCH_MXC
  373. bool "Freescale MXC/iMX-based"
  374. select GENERIC_CLOCKEVENTS
  375. select ARCH_REQUIRE_GPIOLIB
  376. select CLKDEV_LOOKUP
  377. select CLKSRC_MMIO
  378. select GENERIC_IRQ_CHIP
  379. select HAVE_SCHED_CLOCK
  380. select MULTI_IRQ_HANDLER
  381. help
  382. Support for Freescale MXC/iMX-based family of processors
  383. config ARCH_MXS
  384. bool "Freescale MXS-based"
  385. select GENERIC_CLOCKEVENTS
  386. select ARCH_REQUIRE_GPIOLIB
  387. select CLKDEV_LOOKUP
  388. select CLKSRC_MMIO
  389. select HAVE_CLK_PREPARE
  390. help
  391. Support for Freescale MXS-based family of processors
  392. config ARCH_NETX
  393. bool "Hilscher NetX based"
  394. select CLKSRC_MMIO
  395. select CPU_ARM926T
  396. select ARM_VIC
  397. select GENERIC_CLOCKEVENTS
  398. help
  399. This enables support for systems based on the Hilscher NetX Soc
  400. config ARCH_H720X
  401. bool "Hynix HMS720x-based"
  402. select CPU_ARM720T
  403. select ISA_DMA_API
  404. select ARCH_USES_GETTIMEOFFSET
  405. help
  406. This enables support for systems based on the Hynix HMS720x
  407. config ARCH_IOP13XX
  408. bool "IOP13xx-based"
  409. depends on MMU
  410. select CPU_XSC3
  411. select PLAT_IOP
  412. select PCI
  413. select ARCH_SUPPORTS_MSI
  414. select VMSPLIT_1G
  415. select NEED_MACH_MEMORY_H
  416. help
  417. Support for Intel's IOP13XX (XScale) family of processors.
  418. config ARCH_IOP32X
  419. bool "IOP32x-based"
  420. depends on MMU
  421. select CPU_XSCALE
  422. select PLAT_IOP
  423. select PCI
  424. select ARCH_REQUIRE_GPIOLIB
  425. help
  426. Support for Intel's 80219 and IOP32X (XScale) family of
  427. processors.
  428. config ARCH_IOP33X
  429. bool "IOP33x-based"
  430. depends on MMU
  431. select CPU_XSCALE
  432. select PLAT_IOP
  433. select PCI
  434. select ARCH_REQUIRE_GPIOLIB
  435. help
  436. Support for Intel's IOP33X (XScale) family of processors.
  437. config ARCH_IXP23XX
  438. bool "IXP23XX-based"
  439. depends on MMU
  440. select CPU_XSC3
  441. select PCI
  442. select ARCH_USES_GETTIMEOFFSET
  443. select NEED_MACH_MEMORY_H
  444. help
  445. Support for Intel's IXP23xx (XScale) family of processors.
  446. config ARCH_IXP2000
  447. bool "IXP2400/2800-based"
  448. depends on MMU
  449. select CPU_XSCALE
  450. select PCI
  451. select ARCH_USES_GETTIMEOFFSET
  452. select NEED_MACH_MEMORY_H
  453. help
  454. Support for Intel's IXP2400/2800 (XScale) family of processors.
  455. config ARCH_IXP4XX
  456. bool "IXP4xx-based"
  457. depends on MMU
  458. select CLKSRC_MMIO
  459. select CPU_XSCALE
  460. select GENERIC_GPIO
  461. select GENERIC_CLOCKEVENTS
  462. select HAVE_SCHED_CLOCK
  463. select MIGHT_HAVE_PCI
  464. select DMABOUNCE if PCI
  465. help
  466. Support for Intel's IXP4XX (XScale) family of processors.
  467. config ARCH_DOVE
  468. bool "Marvell Dove"
  469. select CPU_V7
  470. select PCI
  471. select ARCH_REQUIRE_GPIOLIB
  472. select GENERIC_CLOCKEVENTS
  473. select PLAT_ORION
  474. help
  475. Support for the Marvell Dove SoC 88AP510
  476. config ARCH_KIRKWOOD
  477. bool "Marvell Kirkwood"
  478. select CPU_FEROCEON
  479. select PCI
  480. select ARCH_REQUIRE_GPIOLIB
  481. select GENERIC_CLOCKEVENTS
  482. select PLAT_ORION
  483. help
  484. Support for the following Marvell Kirkwood series SoCs:
  485. 88F6180, 88F6192 and 88F6281.
  486. config ARCH_LPC32XX
  487. bool "NXP LPC32XX"
  488. select CLKSRC_MMIO
  489. select CPU_ARM926T
  490. select ARCH_REQUIRE_GPIOLIB
  491. select HAVE_IDE
  492. select ARM_AMBA
  493. select USB_ARCH_HAS_OHCI
  494. select CLKDEV_LOOKUP
  495. select GENERIC_CLOCKEVENTS
  496. help
  497. Support for the NXP LPC32XX family of processors
  498. config ARCH_MV78XX0
  499. bool "Marvell MV78xx0"
  500. select CPU_FEROCEON
  501. select PCI
  502. select ARCH_REQUIRE_GPIOLIB
  503. select GENERIC_CLOCKEVENTS
  504. select PLAT_ORION
  505. help
  506. Support for the following Marvell MV78xx0 series SoCs:
  507. MV781x0, MV782x0.
  508. config ARCH_ORION5X
  509. bool "Marvell Orion"
  510. depends on MMU
  511. select CPU_FEROCEON
  512. select PCI
  513. select ARCH_REQUIRE_GPIOLIB
  514. select GENERIC_CLOCKEVENTS
  515. select PLAT_ORION
  516. help
  517. Support for the following Marvell Orion 5x series SoCs:
  518. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  519. Orion-2 (5281), Orion-1-90 (6183).
  520. config ARCH_MMP
  521. bool "Marvell PXA168/910/MMP2"
  522. depends on MMU
  523. select ARCH_REQUIRE_GPIOLIB
  524. select CLKDEV_LOOKUP
  525. select GENERIC_CLOCKEVENTS
  526. select GPIO_PXA
  527. select HAVE_SCHED_CLOCK
  528. select TICK_ONESHOT
  529. select PLAT_PXA
  530. select SPARSE_IRQ
  531. select GENERIC_ALLOCATOR
  532. help
  533. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  534. config ARCH_KS8695
  535. bool "Micrel/Kendin KS8695"
  536. select CPU_ARM922T
  537. select ARCH_REQUIRE_GPIOLIB
  538. select ARCH_USES_GETTIMEOFFSET
  539. select NEED_MACH_MEMORY_H
  540. help
  541. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  542. System-on-Chip devices.
  543. config ARCH_W90X900
  544. bool "Nuvoton W90X900 CPU"
  545. select CPU_ARM926T
  546. select ARCH_REQUIRE_GPIOLIB
  547. select CLKDEV_LOOKUP
  548. select CLKSRC_MMIO
  549. select GENERIC_CLOCKEVENTS
  550. help
  551. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  552. At present, the w90x900 has been renamed nuc900, regarding
  553. the ARM series product line, you can login the following
  554. link address to know more.
  555. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  556. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  557. config ARCH_TEGRA
  558. bool "NVIDIA Tegra"
  559. select CLKDEV_LOOKUP
  560. select CLKSRC_MMIO
  561. select GENERIC_CLOCKEVENTS
  562. select GENERIC_GPIO
  563. select HAVE_CLK
  564. select HAVE_SCHED_CLOCK
  565. select HAVE_SMP
  566. select MIGHT_HAVE_CACHE_L2X0
  567. select ARCH_HAS_CPUFREQ
  568. help
  569. This enables support for NVIDIA Tegra based systems (Tegra APX,
  570. Tegra 6xx and Tegra 2 series).
  571. config ARCH_PICOXCELL
  572. bool "Picochip picoXcell"
  573. select ARCH_REQUIRE_GPIOLIB
  574. select ARM_PATCH_PHYS_VIRT
  575. select ARM_VIC
  576. select CPU_V6K
  577. select DW_APB_TIMER
  578. select GENERIC_CLOCKEVENTS
  579. select GENERIC_GPIO
  580. select HAVE_SCHED_CLOCK
  581. select HAVE_TCM
  582. select NO_IOPORT
  583. select SPARSE_IRQ
  584. select USE_OF
  585. help
  586. This enables support for systems based on the Picochip picoXcell
  587. family of Femtocell devices. The picoxcell support requires device tree
  588. for all boards.
  589. config ARCH_PNX4008
  590. bool "Philips Nexperia PNX4008 Mobile"
  591. select CPU_ARM926T
  592. select CLKDEV_LOOKUP
  593. select ARCH_USES_GETTIMEOFFSET
  594. help
  595. This enables support for Philips PNX4008 mobile platform.
  596. config ARCH_PXA
  597. bool "PXA2xx/PXA3xx-based"
  598. depends on MMU
  599. select ARCH_MTD_XIP
  600. select ARCH_HAS_CPUFREQ
  601. select CLKDEV_LOOKUP
  602. select CLKSRC_MMIO
  603. select ARCH_REQUIRE_GPIOLIB
  604. select GENERIC_CLOCKEVENTS
  605. select GPIO_PXA
  606. select HAVE_SCHED_CLOCK
  607. select TICK_ONESHOT
  608. select PLAT_PXA
  609. select SPARSE_IRQ
  610. select AUTO_ZRELADDR
  611. select MULTI_IRQ_HANDLER
  612. select ARM_CPU_SUSPEND if PM
  613. select HAVE_IDE
  614. help
  615. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  616. config ARCH_MSM
  617. bool "Qualcomm MSM"
  618. select HAVE_CLK
  619. select GENERIC_CLOCKEVENTS
  620. select ARCH_REQUIRE_GPIOLIB
  621. select CLKDEV_LOOKUP
  622. help
  623. Support for Qualcomm MSM/QSD based systems. This runs on the
  624. apps processor of the MSM/QSD and depends on a shared memory
  625. interface to the modem processor which runs the baseband
  626. stack and controls some vital subsystems
  627. (clock and power control, etc).
  628. config ARCH_SHMOBILE
  629. bool "Renesas SH-Mobile / R-Mobile"
  630. select HAVE_CLK
  631. select CLKDEV_LOOKUP
  632. select HAVE_MACH_CLKDEV
  633. select HAVE_SMP
  634. select GENERIC_CLOCKEVENTS
  635. select MIGHT_HAVE_CACHE_L2X0
  636. select NO_IOPORT
  637. select SPARSE_IRQ
  638. select MULTI_IRQ_HANDLER
  639. select PM_GENERIC_DOMAINS if PM
  640. select NEED_MACH_MEMORY_H
  641. help
  642. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  643. config ARCH_RPC
  644. bool "RiscPC"
  645. select ARCH_ACORN
  646. select FIQ
  647. select TIMER_ACORN
  648. select ARCH_MAY_HAVE_PC_FDC
  649. select HAVE_PATA_PLATFORM
  650. select ISA_DMA_API
  651. select NO_IOPORT
  652. select ARCH_SPARSEMEM_ENABLE
  653. select ARCH_USES_GETTIMEOFFSET
  654. select HAVE_IDE
  655. select NEED_MACH_MEMORY_H
  656. help
  657. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  658. CD-ROM interface, serial and parallel port, and the floppy drive.
  659. config ARCH_SA1100
  660. bool "SA1100-based"
  661. select CLKSRC_MMIO
  662. select CPU_SA1100
  663. select ISA
  664. select ARCH_SPARSEMEM_ENABLE
  665. select ARCH_MTD_XIP
  666. select ARCH_HAS_CPUFREQ
  667. select CPU_FREQ
  668. select GENERIC_CLOCKEVENTS
  669. select CLKDEV_LOOKUP
  670. select HAVE_SCHED_CLOCK
  671. select TICK_ONESHOT
  672. select ARCH_REQUIRE_GPIOLIB
  673. select HAVE_IDE
  674. select NEED_MACH_MEMORY_H
  675. help
  676. Support for StrongARM 11x0 based boards.
  677. config ARCH_S3C2410
  678. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  679. select GENERIC_GPIO
  680. select ARCH_HAS_CPUFREQ
  681. select HAVE_CLK
  682. select CLKDEV_LOOKUP
  683. select ARCH_USES_GETTIMEOFFSET
  684. select HAVE_S3C2410_I2C if I2C
  685. help
  686. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  687. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  688. the Samsung SMDK2410 development board (and derivatives).
  689. Note, the S3C2416 and the S3C2450 are so close that they even share
  690. the same SoC ID code. This means that there is no separate machine
  691. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  692. config ARCH_S3C64XX
  693. bool "Samsung S3C64XX"
  694. select PLAT_SAMSUNG
  695. select CPU_V6
  696. select ARM_VIC
  697. select HAVE_CLK
  698. select HAVE_TCM
  699. select CLKDEV_LOOKUP
  700. select NO_IOPORT
  701. select ARCH_USES_GETTIMEOFFSET
  702. select ARCH_HAS_CPUFREQ
  703. select ARCH_REQUIRE_GPIOLIB
  704. select SAMSUNG_CLKSRC
  705. select SAMSUNG_IRQ_VIC_TIMER
  706. select S3C_GPIO_TRACK
  707. select S3C_DEV_NAND
  708. select USB_ARCH_HAS_OHCI
  709. select SAMSUNG_GPIOLIB_4BIT
  710. select HAVE_S3C2410_I2C if I2C
  711. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  712. help
  713. Samsung S3C64XX series based systems
  714. config ARCH_S5P64X0
  715. bool "Samsung S5P6440 S5P6450"
  716. select CPU_V6
  717. select GENERIC_GPIO
  718. select HAVE_CLK
  719. select CLKDEV_LOOKUP
  720. select CLKSRC_MMIO
  721. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  722. select GENERIC_CLOCKEVENTS
  723. select HAVE_SCHED_CLOCK
  724. select HAVE_S3C2410_I2C if I2C
  725. select HAVE_S3C_RTC if RTC_CLASS
  726. help
  727. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  728. SMDK6450.
  729. config ARCH_S5PC100
  730. bool "Samsung S5PC100"
  731. select GENERIC_GPIO
  732. select HAVE_CLK
  733. select CLKDEV_LOOKUP
  734. select CPU_V7
  735. select ARM_L1_CACHE_SHIFT_6
  736. select ARCH_USES_GETTIMEOFFSET
  737. select HAVE_S3C2410_I2C if I2C
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. help
  741. Samsung S5PC100 series based systems
  742. config ARCH_S5PV210
  743. bool "Samsung S5PV210/S5PC110"
  744. select CPU_V7
  745. select ARCH_SPARSEMEM_ENABLE
  746. select ARCH_HAS_HOLES_MEMORYMODEL
  747. select GENERIC_GPIO
  748. select HAVE_CLK
  749. select CLKDEV_LOOKUP
  750. select CLKSRC_MMIO
  751. select ARM_L1_CACHE_SHIFT_6
  752. select ARCH_HAS_CPUFREQ
  753. select GENERIC_CLOCKEVENTS
  754. select HAVE_SCHED_CLOCK
  755. select HAVE_S3C2410_I2C if I2C
  756. select HAVE_S3C_RTC if RTC_CLASS
  757. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  758. select NEED_MACH_MEMORY_H
  759. help
  760. Samsung S5PV210/S5PC110 series based systems
  761. config ARCH_EXYNOS
  762. bool "SAMSUNG EXYNOS"
  763. select CPU_V7
  764. select ARCH_SPARSEMEM_ENABLE
  765. select ARCH_HAS_HOLES_MEMORYMODEL
  766. select GENERIC_GPIO
  767. select HAVE_CLK
  768. select CLKDEV_LOOKUP
  769. select ARCH_HAS_CPUFREQ
  770. select GENERIC_CLOCKEVENTS
  771. select HAVE_S3C_RTC if RTC_CLASS
  772. select HAVE_S3C2410_I2C if I2C
  773. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  774. select NEED_MACH_MEMORY_H
  775. help
  776. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  777. config ARCH_SHARK
  778. bool "Shark"
  779. select CPU_SA110
  780. select ISA
  781. select ISA_DMA
  782. select ZONE_DMA
  783. select PCI
  784. select ARCH_USES_GETTIMEOFFSET
  785. select NEED_MACH_MEMORY_H
  786. help
  787. Support for the StrongARM based Digital DNARD machine, also known
  788. as "Shark" (<http://www.shark-linux.de/shark.html>).
  789. config ARCH_U300
  790. bool "ST-Ericsson U300 Series"
  791. depends on MMU
  792. select CLKSRC_MMIO
  793. select CPU_ARM926T
  794. select HAVE_SCHED_CLOCK
  795. select HAVE_TCM
  796. select ARM_AMBA
  797. select ARM_PATCH_PHYS_VIRT
  798. select ARM_VIC
  799. select GENERIC_CLOCKEVENTS
  800. select CLKDEV_LOOKUP
  801. select HAVE_MACH_CLKDEV
  802. select GENERIC_GPIO
  803. select ARCH_REQUIRE_GPIOLIB
  804. help
  805. Support for ST-Ericsson U300 series mobile platforms.
  806. config ARCH_U8500
  807. bool "ST-Ericsson U8500 Series"
  808. select CPU_V7
  809. select ARM_AMBA
  810. select GENERIC_CLOCKEVENTS
  811. select CLKDEV_LOOKUP
  812. select ARCH_REQUIRE_GPIOLIB
  813. select ARCH_HAS_CPUFREQ
  814. select HAVE_SMP
  815. select MIGHT_HAVE_CACHE_L2X0
  816. help
  817. Support for ST-Ericsson's Ux500 architecture
  818. config ARCH_NOMADIK
  819. bool "STMicroelectronics Nomadik"
  820. select ARM_AMBA
  821. select ARM_VIC
  822. select CPU_ARM926T
  823. select CLKDEV_LOOKUP
  824. select GENERIC_CLOCKEVENTS
  825. select MIGHT_HAVE_CACHE_L2X0
  826. select ARCH_REQUIRE_GPIOLIB
  827. help
  828. Support for the Nomadik platform by ST-Ericsson
  829. config ARCH_DAVINCI
  830. bool "TI DaVinci"
  831. select GENERIC_CLOCKEVENTS
  832. select ARCH_REQUIRE_GPIOLIB
  833. select ZONE_DMA
  834. select HAVE_IDE
  835. select CLKDEV_LOOKUP
  836. select GENERIC_ALLOCATOR
  837. select GENERIC_IRQ_CHIP
  838. select ARCH_HAS_HOLES_MEMORYMODEL
  839. help
  840. Support for TI's DaVinci platform.
  841. config ARCH_OMAP
  842. bool "TI OMAP"
  843. select HAVE_CLK
  844. select ARCH_REQUIRE_GPIOLIB
  845. select ARCH_HAS_CPUFREQ
  846. select CLKSRC_MMIO
  847. select GENERIC_CLOCKEVENTS
  848. select HAVE_SCHED_CLOCK
  849. select ARCH_HAS_HOLES_MEMORYMODEL
  850. help
  851. Support for TI's OMAP platform (OMAP1/2/3/4).
  852. config PLAT_SPEAR
  853. bool "ST SPEAr"
  854. select ARM_AMBA
  855. select ARCH_REQUIRE_GPIOLIB
  856. select CLKDEV_LOOKUP
  857. select CLKSRC_MMIO
  858. select GENERIC_CLOCKEVENTS
  859. select HAVE_CLK
  860. help
  861. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  862. config ARCH_VT8500
  863. bool "VIA/WonderMedia 85xx"
  864. select CPU_ARM926T
  865. select GENERIC_GPIO
  866. select ARCH_HAS_CPUFREQ
  867. select GENERIC_CLOCKEVENTS
  868. select ARCH_REQUIRE_GPIOLIB
  869. select HAVE_PWM
  870. help
  871. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  872. config ARCH_ZYNQ
  873. bool "Xilinx Zynq ARM Cortex A9 Platform"
  874. select CPU_V7
  875. select GENERIC_CLOCKEVENTS
  876. select CLKDEV_LOOKUP
  877. select ARM_GIC
  878. select ARM_AMBA
  879. select ICST
  880. select MIGHT_HAVE_CACHE_L2X0
  881. select USE_OF
  882. help
  883. Support for Xilinx Zynq ARM Cortex A9 Platform
  884. endchoice
  885. #
  886. # This is sorted alphabetically by mach-* pathname. However, plat-*
  887. # Kconfigs may be included either alphabetically (according to the
  888. # plat- suffix) or along side the corresponding mach-* source.
  889. #
  890. source "arch/arm/mach-at91/Kconfig"
  891. source "arch/arm/mach-bcmring/Kconfig"
  892. source "arch/arm/mach-clps711x/Kconfig"
  893. source "arch/arm/mach-cns3xxx/Kconfig"
  894. source "arch/arm/mach-davinci/Kconfig"
  895. source "arch/arm/mach-dove/Kconfig"
  896. source "arch/arm/mach-ep93xx/Kconfig"
  897. source "arch/arm/mach-footbridge/Kconfig"
  898. source "arch/arm/mach-gemini/Kconfig"
  899. source "arch/arm/mach-h720x/Kconfig"
  900. source "arch/arm/mach-integrator/Kconfig"
  901. source "arch/arm/mach-iop32x/Kconfig"
  902. source "arch/arm/mach-iop33x/Kconfig"
  903. source "arch/arm/mach-iop13xx/Kconfig"
  904. source "arch/arm/mach-ixp4xx/Kconfig"
  905. source "arch/arm/mach-ixp2000/Kconfig"
  906. source "arch/arm/mach-ixp23xx/Kconfig"
  907. source "arch/arm/mach-kirkwood/Kconfig"
  908. source "arch/arm/mach-ks8695/Kconfig"
  909. source "arch/arm/mach-lpc32xx/Kconfig"
  910. source "arch/arm/mach-msm/Kconfig"
  911. source "arch/arm/mach-mv78xx0/Kconfig"
  912. source "arch/arm/plat-mxc/Kconfig"
  913. source "arch/arm/mach-mxs/Kconfig"
  914. source "arch/arm/mach-netx/Kconfig"
  915. source "arch/arm/mach-nomadik/Kconfig"
  916. source "arch/arm/plat-nomadik/Kconfig"
  917. source "arch/arm/plat-omap/Kconfig"
  918. source "arch/arm/mach-omap1/Kconfig"
  919. source "arch/arm/mach-omap2/Kconfig"
  920. source "arch/arm/mach-orion5x/Kconfig"
  921. source "arch/arm/mach-pxa/Kconfig"
  922. source "arch/arm/plat-pxa/Kconfig"
  923. source "arch/arm/mach-mmp/Kconfig"
  924. source "arch/arm/mach-realview/Kconfig"
  925. source "arch/arm/mach-sa1100/Kconfig"
  926. source "arch/arm/plat-samsung/Kconfig"
  927. source "arch/arm/plat-s3c24xx/Kconfig"
  928. source "arch/arm/plat-s5p/Kconfig"
  929. source "arch/arm/plat-spear/Kconfig"
  930. if ARCH_S3C2410
  931. source "arch/arm/mach-s3c2410/Kconfig"
  932. source "arch/arm/mach-s3c2412/Kconfig"
  933. source "arch/arm/mach-s3c2416/Kconfig"
  934. source "arch/arm/mach-s3c2440/Kconfig"
  935. source "arch/arm/mach-s3c2443/Kconfig"
  936. endif
  937. if ARCH_S3C64XX
  938. source "arch/arm/mach-s3c64xx/Kconfig"
  939. endif
  940. source "arch/arm/mach-s5p64x0/Kconfig"
  941. source "arch/arm/mach-s5pc100/Kconfig"
  942. source "arch/arm/mach-s5pv210/Kconfig"
  943. source "arch/arm/mach-exynos/Kconfig"
  944. source "arch/arm/mach-shmobile/Kconfig"
  945. source "arch/arm/mach-tegra/Kconfig"
  946. source "arch/arm/mach-u300/Kconfig"
  947. source "arch/arm/mach-ux500/Kconfig"
  948. source "arch/arm/mach-versatile/Kconfig"
  949. source "arch/arm/mach-vexpress/Kconfig"
  950. source "arch/arm/plat-versatile/Kconfig"
  951. source "arch/arm/mach-vt8500/Kconfig"
  952. source "arch/arm/mach-w90x900/Kconfig"
  953. # Definitions to make life easier
  954. config ARCH_ACORN
  955. bool
  956. config PLAT_IOP
  957. bool
  958. select GENERIC_CLOCKEVENTS
  959. select HAVE_SCHED_CLOCK
  960. config PLAT_ORION
  961. bool
  962. select CLKSRC_MMIO
  963. select GENERIC_IRQ_CHIP
  964. select HAVE_SCHED_CLOCK
  965. config PLAT_PXA
  966. bool
  967. config PLAT_VERSATILE
  968. bool
  969. config ARM_TIMER_SP804
  970. bool
  971. select CLKSRC_MMIO
  972. source arch/arm/mm/Kconfig
  973. config ARM_NR_BANKS
  974. int
  975. default 16 if ARCH_EP93XX
  976. default 8
  977. config IWMMXT
  978. bool "Enable iWMMXt support"
  979. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  980. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  981. help
  982. Enable support for iWMMXt context switching at run time if
  983. running on a CPU that supports it.
  984. config XSCALE_PMU
  985. bool
  986. depends on CPU_XSCALE
  987. default y
  988. config CPU_HAS_PMU
  989. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  990. (!ARCH_OMAP3 || OMAP3_EMU)
  991. default y
  992. bool
  993. config MULTI_IRQ_HANDLER
  994. bool
  995. help
  996. Allow each machine to specify it's own IRQ handler at run time.
  997. if !MMU
  998. source "arch/arm/Kconfig-nommu"
  999. endif
  1000. config ARM_ERRATA_411920
  1001. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1002. depends on CPU_V6 || CPU_V6K
  1003. help
  1004. Invalidation of the Instruction Cache operation can
  1005. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1006. It does not affect the MPCore. This option enables the ARM Ltd.
  1007. recommended workaround.
  1008. config ARM_ERRATA_430973
  1009. bool "ARM errata: Stale prediction on replaced interworking branch"
  1010. depends on CPU_V7
  1011. help
  1012. This option enables the workaround for the 430973 Cortex-A8
  1013. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1014. interworking branch is replaced with another code sequence at the
  1015. same virtual address, whether due to self-modifying code or virtual
  1016. to physical address re-mapping, Cortex-A8 does not recover from the
  1017. stale interworking branch prediction. This results in Cortex-A8
  1018. executing the new code sequence in the incorrect ARM or Thumb state.
  1019. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1020. and also flushes the branch target cache at every context switch.
  1021. Note that setting specific bits in the ACTLR register may not be
  1022. available in non-secure mode.
  1023. config ARM_ERRATA_458693
  1024. bool "ARM errata: Processor deadlock when a false hazard is created"
  1025. depends on CPU_V7
  1026. help
  1027. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1028. erratum. For very specific sequences of memory operations, it is
  1029. possible for a hazard condition intended for a cache line to instead
  1030. be incorrectly associated with a different cache line. This false
  1031. hazard might then cause a processor deadlock. The workaround enables
  1032. the L1 caching of the NEON accesses and disables the PLD instruction
  1033. in the ACTLR register. Note that setting specific bits in the ACTLR
  1034. register may not be available in non-secure mode.
  1035. config ARM_ERRATA_460075
  1036. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1037. depends on CPU_V7
  1038. help
  1039. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1040. erratum. Any asynchronous access to the L2 cache may encounter a
  1041. situation in which recent store transactions to the L2 cache are lost
  1042. and overwritten with stale memory contents from external memory. The
  1043. workaround disables the write-allocate mode for the L2 cache via the
  1044. ACTLR register. Note that setting specific bits in the ACTLR register
  1045. may not be available in non-secure mode.
  1046. config ARM_ERRATA_742230
  1047. bool "ARM errata: DMB operation may be faulty"
  1048. depends on CPU_V7 && SMP
  1049. help
  1050. This option enables the workaround for the 742230 Cortex-A9
  1051. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1052. between two write operations may not ensure the correct visibility
  1053. ordering of the two writes. This workaround sets a specific bit in
  1054. the diagnostic register of the Cortex-A9 which causes the DMB
  1055. instruction to behave as a DSB, ensuring the correct behaviour of
  1056. the two writes.
  1057. config ARM_ERRATA_742231
  1058. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1059. depends on CPU_V7 && SMP
  1060. help
  1061. This option enables the workaround for the 742231 Cortex-A9
  1062. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1063. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1064. accessing some data located in the same cache line, may get corrupted
  1065. data due to bad handling of the address hazard when the line gets
  1066. replaced from one of the CPUs at the same time as another CPU is
  1067. accessing it. This workaround sets specific bits in the diagnostic
  1068. register of the Cortex-A9 which reduces the linefill issuing
  1069. capabilities of the processor.
  1070. config PL310_ERRATA_588369
  1071. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1072. depends on CACHE_L2X0
  1073. help
  1074. The PL310 L2 cache controller implements three types of Clean &
  1075. Invalidate maintenance operations: by Physical Address
  1076. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1077. They are architecturally defined to behave as the execution of a
  1078. clean operation followed immediately by an invalidate operation,
  1079. both performing to the same memory location. This functionality
  1080. is not correctly implemented in PL310 as clean lines are not
  1081. invalidated as a result of these operations.
  1082. config ARM_ERRATA_720789
  1083. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1084. depends on CPU_V7
  1085. help
  1086. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1087. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1088. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1089. As a consequence of this erratum, some TLB entries which should be
  1090. invalidated are not, resulting in an incoherency in the system page
  1091. tables. The workaround changes the TLB flushing routines to invalidate
  1092. entries regardless of the ASID.
  1093. config PL310_ERRATA_727915
  1094. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1095. depends on CACHE_L2X0
  1096. help
  1097. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1098. operation (offset 0x7FC). This operation runs in background so that
  1099. PL310 can handle normal accesses while it is in progress. Under very
  1100. rare circumstances, due to this erratum, write data can be lost when
  1101. PL310 treats a cacheable write transaction during a Clean &
  1102. Invalidate by Way operation.
  1103. config ARM_ERRATA_743622
  1104. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1105. depends on CPU_V7
  1106. help
  1107. This option enables the workaround for the 743622 Cortex-A9
  1108. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1109. optimisation in the Cortex-A9 Store Buffer may lead to data
  1110. corruption. This workaround sets a specific bit in the diagnostic
  1111. register of the Cortex-A9 which disables the Store Buffer
  1112. optimisation, preventing the defect from occurring. This has no
  1113. visible impact on the overall performance or power consumption of the
  1114. processor.
  1115. config ARM_ERRATA_751472
  1116. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1117. depends on CPU_V7
  1118. help
  1119. This option enables the workaround for the 751472 Cortex-A9 (prior
  1120. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1121. completion of a following broadcasted operation if the second
  1122. operation is received by a CPU before the ICIALLUIS has completed,
  1123. potentially leading to corrupted entries in the cache or TLB.
  1124. config PL310_ERRATA_753970
  1125. bool "PL310 errata: cache sync operation may be faulty"
  1126. depends on CACHE_PL310
  1127. help
  1128. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1129. Under some condition the effect of cache sync operation on
  1130. the store buffer still remains when the operation completes.
  1131. This means that the store buffer is always asked to drain and
  1132. this prevents it from merging any further writes. The workaround
  1133. is to replace the normal offset of cache sync operation (0x730)
  1134. by another offset targeting an unmapped PL310 register 0x740.
  1135. This has the same effect as the cache sync operation: store buffer
  1136. drain and waiting for all buffers empty.
  1137. config ARM_ERRATA_754322
  1138. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1139. depends on CPU_V7
  1140. help
  1141. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1142. r3p*) erratum. A speculative memory access may cause a page table walk
  1143. which starts prior to an ASID switch but completes afterwards. This
  1144. can populate the micro-TLB with a stale entry which may be hit with
  1145. the new ASID. This workaround places two dsb instructions in the mm
  1146. switching code so that no page table walks can cross the ASID switch.
  1147. config ARM_ERRATA_754327
  1148. bool "ARM errata: no automatic Store Buffer drain"
  1149. depends on CPU_V7 && SMP
  1150. help
  1151. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1152. r2p0) erratum. The Store Buffer does not have any automatic draining
  1153. mechanism and therefore a livelock may occur if an external agent
  1154. continuously polls a memory location waiting to observe an update.
  1155. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1156. written polling loops from denying visibility of updates to memory.
  1157. config ARM_ERRATA_364296
  1158. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1159. depends on CPU_V6 && !SMP
  1160. help
  1161. This options enables the workaround for the 364296 ARM1136
  1162. r0p2 erratum (possible cache data corruption with
  1163. hit-under-miss enabled). It sets the undocumented bit 31 in
  1164. the auxiliary control register and the FI bit in the control
  1165. register, thus disabling hit-under-miss without putting the
  1166. processor into full low interrupt latency mode. ARM11MPCore
  1167. is not affected.
  1168. config ARM_ERRATA_764369
  1169. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1170. depends on CPU_V7 && SMP
  1171. help
  1172. This option enables the workaround for erratum 764369
  1173. affecting Cortex-A9 MPCore with two or more processors (all
  1174. current revisions). Under certain timing circumstances, a data
  1175. cache line maintenance operation by MVA targeting an Inner
  1176. Shareable memory region may fail to proceed up to either the
  1177. Point of Coherency or to the Point of Unification of the
  1178. system. This workaround adds a DSB instruction before the
  1179. relevant cache maintenance functions and sets a specific bit
  1180. in the diagnostic control register of the SCU.
  1181. config PL310_ERRATA_769419
  1182. bool "PL310 errata: no automatic Store Buffer drain"
  1183. depends on CACHE_L2X0
  1184. help
  1185. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1186. not automatically drain. This can cause normal, non-cacheable
  1187. writes to be retained when the memory system is idle, leading
  1188. to suboptimal I/O performance for drivers using coherent DMA.
  1189. This option adds a write barrier to the cpu_idle loop so that,
  1190. on systems with an outer cache, the store buffer is drained
  1191. explicitly.
  1192. endmenu
  1193. source "arch/arm/common/Kconfig"
  1194. menu "Bus support"
  1195. config ARM_AMBA
  1196. bool
  1197. config ISA
  1198. bool
  1199. help
  1200. Find out whether you have ISA slots on your motherboard. ISA is the
  1201. name of a bus system, i.e. the way the CPU talks to the other stuff
  1202. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1203. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1204. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1205. # Select ISA DMA controller support
  1206. config ISA_DMA
  1207. bool
  1208. select ISA_DMA_API
  1209. # Select ISA DMA interface
  1210. config ISA_DMA_API
  1211. bool
  1212. config PCI
  1213. bool "PCI support" if MIGHT_HAVE_PCI
  1214. help
  1215. Find out whether you have a PCI motherboard. PCI is the name of a
  1216. bus system, i.e. the way the CPU talks to the other stuff inside
  1217. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1218. VESA. If you have PCI, say Y, otherwise N.
  1219. config PCI_DOMAINS
  1220. bool
  1221. depends on PCI
  1222. config PCI_NANOENGINE
  1223. bool "BSE nanoEngine PCI support"
  1224. depends on SA1100_NANOENGINE
  1225. help
  1226. Enable PCI on the BSE nanoEngine board.
  1227. config PCI_SYSCALL
  1228. def_bool PCI
  1229. # Select the host bridge type
  1230. config PCI_HOST_VIA82C505
  1231. bool
  1232. depends on PCI && ARCH_SHARK
  1233. default y
  1234. config PCI_HOST_ITE8152
  1235. bool
  1236. depends on PCI && MACH_ARMCORE
  1237. default y
  1238. select DMABOUNCE
  1239. source "drivers/pci/Kconfig"
  1240. source "drivers/pcmcia/Kconfig"
  1241. endmenu
  1242. menu "Kernel Features"
  1243. source "kernel/time/Kconfig"
  1244. config HAVE_SMP
  1245. bool
  1246. help
  1247. This option should be selected by machines which have an SMP-
  1248. capable CPU.
  1249. The only effect of this option is to make the SMP-related
  1250. options available to the user for configuration.
  1251. config SMP
  1252. bool "Symmetric Multi-Processing"
  1253. depends on CPU_V6K || CPU_V7
  1254. depends on GENERIC_CLOCKEVENTS
  1255. depends on HAVE_SMP
  1256. depends on MMU
  1257. select USE_GENERIC_SMP_HELPERS
  1258. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1259. help
  1260. This enables support for systems with more than one CPU. If you have
  1261. a system with only one CPU, like most personal computers, say N. If
  1262. you have a system with more than one CPU, say Y.
  1263. If you say N here, the kernel will run on single and multiprocessor
  1264. machines, but will use only one CPU of a multiprocessor machine. If
  1265. you say Y here, the kernel will run on many, but not all, single
  1266. processor machines. On a single processor machine, the kernel will
  1267. run faster if you say N here.
  1268. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1269. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1270. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1271. If you don't know what to do here, say N.
  1272. config SMP_ON_UP
  1273. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1274. depends on EXPERIMENTAL
  1275. depends on SMP && !XIP_KERNEL
  1276. default y
  1277. help
  1278. SMP kernels contain instructions which fail on non-SMP processors.
  1279. Enabling this option allows the kernel to modify itself to make
  1280. these instructions safe. Disabling it allows about 1K of space
  1281. savings.
  1282. If you don't know what to do here, say Y.
  1283. config ARM_CPU_TOPOLOGY
  1284. bool "Support cpu topology definition"
  1285. depends on SMP && CPU_V7
  1286. default y
  1287. help
  1288. Support ARM cpu topology definition. The MPIDR register defines
  1289. affinity between processors which is then used to describe the cpu
  1290. topology of an ARM System.
  1291. config SCHED_MC
  1292. bool "Multi-core scheduler support"
  1293. depends on ARM_CPU_TOPOLOGY
  1294. help
  1295. Multi-core scheduler support improves the CPU scheduler's decision
  1296. making when dealing with multi-core CPU chips at a cost of slightly
  1297. increased overhead in some places. If unsure say N here.
  1298. config SCHED_SMT
  1299. bool "SMT scheduler support"
  1300. depends on ARM_CPU_TOPOLOGY
  1301. help
  1302. Improves the CPU scheduler's decision making when dealing with
  1303. MultiThreading at a cost of slightly increased overhead in some
  1304. places. If unsure say N here.
  1305. config HAVE_ARM_SCU
  1306. bool
  1307. help
  1308. This option enables support for the ARM system coherency unit
  1309. config HAVE_ARM_TWD
  1310. bool
  1311. depends on SMP
  1312. select TICK_ONESHOT
  1313. help
  1314. This options enables support for the ARM timer and watchdog unit
  1315. choice
  1316. prompt "Memory split"
  1317. default VMSPLIT_3G
  1318. help
  1319. Select the desired split between kernel and user memory.
  1320. If you are not absolutely sure what you are doing, leave this
  1321. option alone!
  1322. config VMSPLIT_3G
  1323. bool "3G/1G user/kernel split"
  1324. config VMSPLIT_2G
  1325. bool "2G/2G user/kernel split"
  1326. config VMSPLIT_1G
  1327. bool "1G/3G user/kernel split"
  1328. endchoice
  1329. config PAGE_OFFSET
  1330. hex
  1331. default 0x40000000 if VMSPLIT_1G
  1332. default 0x80000000 if VMSPLIT_2G
  1333. default 0xC0000000
  1334. config NR_CPUS
  1335. int "Maximum number of CPUs (2-32)"
  1336. range 2 32
  1337. depends on SMP
  1338. default "4"
  1339. config HOTPLUG_CPU
  1340. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1341. depends on SMP && HOTPLUG && EXPERIMENTAL
  1342. help
  1343. Say Y here to experiment with turning CPUs off and on. CPUs
  1344. can be controlled through /sys/devices/system/cpu.
  1345. config LOCAL_TIMERS
  1346. bool "Use local timer interrupts"
  1347. depends on SMP
  1348. default y
  1349. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1350. help
  1351. Enable support for local timers on SMP platforms, rather then the
  1352. legacy IPI broadcast method. Local timers allows the system
  1353. accounting to be spread across the timer interval, preventing a
  1354. "thundering herd" at every timer tick.
  1355. config ARCH_NR_GPIO
  1356. int
  1357. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1358. default 350 if ARCH_U8500
  1359. default 0
  1360. help
  1361. Maximum number of GPIOs in the system.
  1362. If unsure, leave the default value.
  1363. source kernel/Kconfig.preempt
  1364. config HZ
  1365. int
  1366. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1367. ARCH_S5PV210 || ARCH_EXYNOS4
  1368. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1369. default AT91_TIMER_HZ if ARCH_AT91
  1370. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1371. default 100
  1372. config THUMB2_KERNEL
  1373. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1374. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1375. select AEABI
  1376. select ARM_ASM_UNIFIED
  1377. select ARM_UNWIND
  1378. help
  1379. By enabling this option, the kernel will be compiled in
  1380. Thumb-2 mode. A compiler/assembler that understand the unified
  1381. ARM-Thumb syntax is needed.
  1382. If unsure, say N.
  1383. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1384. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1385. depends on THUMB2_KERNEL && MODULES
  1386. default y
  1387. help
  1388. Various binutils versions can resolve Thumb-2 branches to
  1389. locally-defined, preemptible global symbols as short-range "b.n"
  1390. branch instructions.
  1391. This is a problem, because there's no guarantee the final
  1392. destination of the symbol, or any candidate locations for a
  1393. trampoline, are within range of the branch. For this reason, the
  1394. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1395. relocation in modules at all, and it makes little sense to add
  1396. support.
  1397. The symptom is that the kernel fails with an "unsupported
  1398. relocation" error when loading some modules.
  1399. Until fixed tools are available, passing
  1400. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1401. code which hits this problem, at the cost of a bit of extra runtime
  1402. stack usage in some cases.
  1403. The problem is described in more detail at:
  1404. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1405. Only Thumb-2 kernels are affected.
  1406. Unless you are sure your tools don't have this problem, say Y.
  1407. config ARM_ASM_UNIFIED
  1408. bool
  1409. config AEABI
  1410. bool "Use the ARM EABI to compile the kernel"
  1411. help
  1412. This option allows for the kernel to be compiled using the latest
  1413. ARM ABI (aka EABI). This is only useful if you are using a user
  1414. space environment that is also compiled with EABI.
  1415. Since there are major incompatibilities between the legacy ABI and
  1416. EABI, especially with regard to structure member alignment, this
  1417. option also changes the kernel syscall calling convention to
  1418. disambiguate both ABIs and allow for backward compatibility support
  1419. (selected with CONFIG_OABI_COMPAT).
  1420. To use this you need GCC version 4.0.0 or later.
  1421. config OABI_COMPAT
  1422. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1423. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1424. default y
  1425. help
  1426. This option preserves the old syscall interface along with the
  1427. new (ARM EABI) one. It also provides a compatibility layer to
  1428. intercept syscalls that have structure arguments which layout
  1429. in memory differs between the legacy ABI and the new ARM EABI
  1430. (only for non "thumb" binaries). This option adds a tiny
  1431. overhead to all syscalls and produces a slightly larger kernel.
  1432. If you know you'll be using only pure EABI user space then you
  1433. can say N here. If this option is not selected and you attempt
  1434. to execute a legacy ABI binary then the result will be
  1435. UNPREDICTABLE (in fact it can be predicted that it won't work
  1436. at all). If in doubt say Y.
  1437. config ARCH_HAS_HOLES_MEMORYMODEL
  1438. bool
  1439. config ARCH_SPARSEMEM_ENABLE
  1440. bool
  1441. config ARCH_SPARSEMEM_DEFAULT
  1442. def_bool ARCH_SPARSEMEM_ENABLE
  1443. config ARCH_SELECT_MEMORY_MODEL
  1444. def_bool ARCH_SPARSEMEM_ENABLE
  1445. config HAVE_ARCH_PFN_VALID
  1446. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1447. config HIGHMEM
  1448. bool "High Memory Support"
  1449. depends on MMU
  1450. help
  1451. The address space of ARM processors is only 4 Gigabytes large
  1452. and it has to accommodate user address space, kernel address
  1453. space as well as some memory mapped IO. That means that, if you
  1454. have a large amount of physical memory and/or IO, not all of the
  1455. memory can be "permanently mapped" by the kernel. The physical
  1456. memory that is not permanently mapped is called "high memory".
  1457. Depending on the selected kernel/user memory split, minimum
  1458. vmalloc space and actual amount of RAM, you may not need this
  1459. option which should result in a slightly faster kernel.
  1460. If unsure, say n.
  1461. config HIGHPTE
  1462. bool "Allocate 2nd-level pagetables from highmem"
  1463. depends on HIGHMEM
  1464. config HW_PERF_EVENTS
  1465. bool "Enable hardware performance counter support for perf events"
  1466. depends on PERF_EVENTS && CPU_HAS_PMU
  1467. default y
  1468. help
  1469. Enable hardware performance counter support for perf events. If
  1470. disabled, perf events will use software events only.
  1471. source "mm/Kconfig"
  1472. config FORCE_MAX_ZONEORDER
  1473. int "Maximum zone order" if ARCH_SHMOBILE
  1474. range 11 64 if ARCH_SHMOBILE
  1475. default "9" if SA1111
  1476. default "11"
  1477. help
  1478. The kernel memory allocator divides physically contiguous memory
  1479. blocks into "zones", where each zone is a power of two number of
  1480. pages. This option selects the largest power of two that the kernel
  1481. keeps in the memory allocator. If you need to allocate very large
  1482. blocks of physically contiguous memory, then you may need to
  1483. increase this value.
  1484. This config option is actually maximum order plus one. For example,
  1485. a value of 11 means that the largest free memory block is 2^10 pages.
  1486. config LEDS
  1487. bool "Timer and CPU usage LEDs"
  1488. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1489. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1490. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1491. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1492. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1493. ARCH_AT91 || ARCH_DAVINCI || \
  1494. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1495. help
  1496. If you say Y here, the LEDs on your machine will be used
  1497. to provide useful information about your current system status.
  1498. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1499. be able to select which LEDs are active using the options below. If
  1500. you are compiling a kernel for the EBSA-110 or the LART however, the
  1501. red LED will simply flash regularly to indicate that the system is
  1502. still functional. It is safe to say Y here if you have a CATS
  1503. system, but the driver will do nothing.
  1504. config LEDS_TIMER
  1505. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1506. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1507. || MACH_OMAP_PERSEUS2
  1508. depends on LEDS
  1509. depends on !GENERIC_CLOCKEVENTS
  1510. default y if ARCH_EBSA110
  1511. help
  1512. If you say Y here, one of the system LEDs (the green one on the
  1513. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1514. will flash regularly to indicate that the system is still
  1515. operational. This is mainly useful to kernel hackers who are
  1516. debugging unstable kernels.
  1517. The LART uses the same LED for both Timer LED and CPU usage LED
  1518. functions. You may choose to use both, but the Timer LED function
  1519. will overrule the CPU usage LED.
  1520. config LEDS_CPU
  1521. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1522. !ARCH_OMAP) \
  1523. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1524. || MACH_OMAP_PERSEUS2
  1525. depends on LEDS
  1526. help
  1527. If you say Y here, the red LED will be used to give a good real
  1528. time indication of CPU usage, by lighting whenever the idle task
  1529. is not currently executing.
  1530. The LART uses the same LED for both Timer LED and CPU usage LED
  1531. functions. You may choose to use both, but the Timer LED function
  1532. will overrule the CPU usage LED.
  1533. config ALIGNMENT_TRAP
  1534. bool
  1535. depends on CPU_CP15_MMU
  1536. default y if !ARCH_EBSA110
  1537. select HAVE_PROC_CPU if PROC_FS
  1538. help
  1539. ARM processors cannot fetch/store information which is not
  1540. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1541. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1542. fetch/store instructions will be emulated in software if you say
  1543. here, which has a severe performance impact. This is necessary for
  1544. correct operation of some network protocols. With an IP-only
  1545. configuration it is safe to say N, otherwise say Y.
  1546. config UACCESS_WITH_MEMCPY
  1547. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1548. depends on MMU && EXPERIMENTAL
  1549. default y if CPU_FEROCEON
  1550. help
  1551. Implement faster copy_to_user and clear_user methods for CPU
  1552. cores where a 8-word STM instruction give significantly higher
  1553. memory write throughput than a sequence of individual 32bit stores.
  1554. A possible side effect is a slight increase in scheduling latency
  1555. between threads sharing the same address space if they invoke
  1556. such copy operations with large buffers.
  1557. However, if the CPU data cache is using a write-allocate mode,
  1558. this option is unlikely to provide any performance gain.
  1559. config SECCOMP
  1560. bool
  1561. prompt "Enable seccomp to safely compute untrusted bytecode"
  1562. ---help---
  1563. This kernel feature is useful for number crunching applications
  1564. that may need to compute untrusted bytecode during their
  1565. execution. By using pipes or other transports made available to
  1566. the process as file descriptors supporting the read/write
  1567. syscalls, it's possible to isolate those applications in
  1568. their own address space using seccomp. Once seccomp is
  1569. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1570. and the task is only allowed to execute a few safe syscalls
  1571. defined by each seccomp mode.
  1572. config CC_STACKPROTECTOR
  1573. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1574. depends on EXPERIMENTAL
  1575. help
  1576. This option turns on the -fstack-protector GCC feature. This
  1577. feature puts, at the beginning of functions, a canary value on
  1578. the stack just before the return address, and validates
  1579. the value just before actually returning. Stack based buffer
  1580. overflows (that need to overwrite this return address) now also
  1581. overwrite the canary, which gets detected and the attack is then
  1582. neutralized via a kernel panic.
  1583. This feature requires gcc version 4.2 or above.
  1584. config DEPRECATED_PARAM_STRUCT
  1585. bool "Provide old way to pass kernel parameters"
  1586. help
  1587. This was deprecated in 2001 and announced to live on for 5 years.
  1588. Some old boot loaders still use this way.
  1589. endmenu
  1590. menu "Boot options"
  1591. config USE_OF
  1592. bool "Flattened Device Tree support"
  1593. select OF
  1594. select OF_EARLY_FLATTREE
  1595. select IRQ_DOMAIN
  1596. help
  1597. Include support for flattened device tree machine descriptions.
  1598. # Compressed boot loader in ROM. Yes, we really want to ask about
  1599. # TEXT and BSS so we preserve their values in the config files.
  1600. config ZBOOT_ROM_TEXT
  1601. hex "Compressed ROM boot loader base address"
  1602. default "0"
  1603. help
  1604. The physical address at which the ROM-able zImage is to be
  1605. placed in the target. Platforms which normally make use of
  1606. ROM-able zImage formats normally set this to a suitable
  1607. value in their defconfig file.
  1608. If ZBOOT_ROM is not enabled, this has no effect.
  1609. config ZBOOT_ROM_BSS
  1610. hex "Compressed ROM boot loader BSS address"
  1611. default "0"
  1612. help
  1613. The base address of an area of read/write memory in the target
  1614. for the ROM-able zImage which must be available while the
  1615. decompressor is running. It must be large enough to hold the
  1616. entire decompressed kernel plus an additional 128 KiB.
  1617. Platforms which normally make use of ROM-able zImage formats
  1618. normally set this to a suitable value in their defconfig file.
  1619. If ZBOOT_ROM is not enabled, this has no effect.
  1620. config ZBOOT_ROM
  1621. bool "Compressed boot loader in ROM/flash"
  1622. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1623. help
  1624. Say Y here if you intend to execute your compressed kernel image
  1625. (zImage) directly from ROM or flash. If unsure, say N.
  1626. choice
  1627. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1628. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1629. default ZBOOT_ROM_NONE
  1630. help
  1631. Include experimental SD/MMC loading code in the ROM-able zImage.
  1632. With this enabled it is possible to write the the ROM-able zImage
  1633. kernel image to an MMC or SD card and boot the kernel straight
  1634. from the reset vector. At reset the processor Mask ROM will load
  1635. the first part of the the ROM-able zImage which in turn loads the
  1636. rest the kernel image to RAM.
  1637. config ZBOOT_ROM_NONE
  1638. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1639. help
  1640. Do not load image from SD or MMC
  1641. config ZBOOT_ROM_MMCIF
  1642. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1643. help
  1644. Load image from MMCIF hardware block.
  1645. config ZBOOT_ROM_SH_MOBILE_SDHI
  1646. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1647. help
  1648. Load image from SDHI hardware block
  1649. endchoice
  1650. config ARM_APPENDED_DTB
  1651. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1652. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1653. help
  1654. With this option, the boot code will look for a device tree binary
  1655. (DTB) appended to zImage
  1656. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1657. This is meant as a backward compatibility convenience for those
  1658. systems with a bootloader that can't be upgraded to accommodate
  1659. the documented boot protocol using a device tree.
  1660. Beware that there is very little in terms of protection against
  1661. this option being confused by leftover garbage in memory that might
  1662. look like a DTB header after a reboot if no actual DTB is appended
  1663. to zImage. Do not leave this option active in a production kernel
  1664. if you don't intend to always append a DTB. Proper passing of the
  1665. location into r2 of a bootloader provided DTB is always preferable
  1666. to this option.
  1667. config ARM_ATAG_DTB_COMPAT
  1668. bool "Supplement the appended DTB with traditional ATAG information"
  1669. depends on ARM_APPENDED_DTB
  1670. help
  1671. Some old bootloaders can't be updated to a DTB capable one, yet
  1672. they provide ATAGs with memory configuration, the ramdisk address,
  1673. the kernel cmdline string, etc. Such information is dynamically
  1674. provided by the bootloader and can't always be stored in a static
  1675. DTB. To allow a device tree enabled kernel to be used with such
  1676. bootloaders, this option allows zImage to extract the information
  1677. from the ATAG list and store it at run time into the appended DTB.
  1678. config CMDLINE
  1679. string "Default kernel command string"
  1680. default ""
  1681. help
  1682. On some architectures (EBSA110 and CATS), there is currently no way
  1683. for the boot loader to pass arguments to the kernel. For these
  1684. architectures, you should supply some command-line options at build
  1685. time by entering them here. As a minimum, you should specify the
  1686. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1687. choice
  1688. prompt "Kernel command line type" if CMDLINE != ""
  1689. default CMDLINE_FROM_BOOTLOADER
  1690. config CMDLINE_FROM_BOOTLOADER
  1691. bool "Use bootloader kernel arguments if available"
  1692. help
  1693. Uses the command-line options passed by the boot loader. If
  1694. the boot loader doesn't provide any, the default kernel command
  1695. string provided in CMDLINE will be used.
  1696. config CMDLINE_EXTEND
  1697. bool "Extend bootloader kernel arguments"
  1698. help
  1699. The command-line arguments provided by the boot loader will be
  1700. appended to the default kernel command string.
  1701. config CMDLINE_FORCE
  1702. bool "Always use the default kernel command string"
  1703. help
  1704. Always use the default kernel command string, even if the boot
  1705. loader passes other arguments to the kernel.
  1706. This is useful if you cannot or don't want to change the
  1707. command-line options your boot loader passes to the kernel.
  1708. endchoice
  1709. config XIP_KERNEL
  1710. bool "Kernel Execute-In-Place from ROM"
  1711. depends on !ZBOOT_ROM && !ARM_LPAE
  1712. help
  1713. Execute-In-Place allows the kernel to run from non-volatile storage
  1714. directly addressable by the CPU, such as NOR flash. This saves RAM
  1715. space since the text section of the kernel is not loaded from flash
  1716. to RAM. Read-write sections, such as the data section and stack,
  1717. are still copied to RAM. The XIP kernel is not compressed since
  1718. it has to run directly from flash, so it will take more space to
  1719. store it. The flash address used to link the kernel object files,
  1720. and for storing it, is configuration dependent. Therefore, if you
  1721. say Y here, you must know the proper physical address where to
  1722. store the kernel image depending on your own flash memory usage.
  1723. Also note that the make target becomes "make xipImage" rather than
  1724. "make zImage" or "make Image". The final kernel binary to put in
  1725. ROM memory will be arch/arm/boot/xipImage.
  1726. If unsure, say N.
  1727. config XIP_PHYS_ADDR
  1728. hex "XIP Kernel Physical Location"
  1729. depends on XIP_KERNEL
  1730. default "0x00080000"
  1731. help
  1732. This is the physical address in your flash memory the kernel will
  1733. be linked for and stored to. This address is dependent on your
  1734. own flash usage.
  1735. config KEXEC
  1736. bool "Kexec system call (EXPERIMENTAL)"
  1737. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1738. help
  1739. kexec is a system call that implements the ability to shutdown your
  1740. current kernel, and to start another kernel. It is like a reboot
  1741. but it is independent of the system firmware. And like a reboot
  1742. you can start any kernel with it, not just Linux.
  1743. It is an ongoing process to be certain the hardware in a machine
  1744. is properly shutdown, so do not be surprised if this code does not
  1745. initially work for you. It may help to enable device hotplugging
  1746. support.
  1747. config ATAGS_PROC
  1748. bool "Export atags in procfs"
  1749. depends on KEXEC
  1750. default y
  1751. help
  1752. Should the atags used to boot the kernel be exported in an "atags"
  1753. file in procfs. Useful with kexec.
  1754. config CRASH_DUMP
  1755. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1756. depends on EXPERIMENTAL
  1757. help
  1758. Generate crash dump after being started by kexec. This should
  1759. be normally only set in special crash dump kernels which are
  1760. loaded in the main kernel with kexec-tools into a specially
  1761. reserved region and then later executed after a crash by
  1762. kdump/kexec. The crash dump kernel must be compiled to a
  1763. memory address not used by the main kernel
  1764. For more details see Documentation/kdump/kdump.txt
  1765. config AUTO_ZRELADDR
  1766. bool "Auto calculation of the decompressed kernel image address"
  1767. depends on !ZBOOT_ROM && !ARCH_U300
  1768. help
  1769. ZRELADDR is the physical address where the decompressed kernel
  1770. image will be placed. If AUTO_ZRELADDR is selected, the address
  1771. will be determined at run-time by masking the current IP with
  1772. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1773. from start of memory.
  1774. endmenu
  1775. menu "CPU Power Management"
  1776. if ARCH_HAS_CPUFREQ
  1777. source "drivers/cpufreq/Kconfig"
  1778. config CPU_FREQ_IMX
  1779. tristate "CPUfreq driver for i.MX CPUs"
  1780. depends on ARCH_MXC && CPU_FREQ
  1781. help
  1782. This enables the CPUfreq driver for i.MX CPUs.
  1783. config CPU_FREQ_SA1100
  1784. bool
  1785. config CPU_FREQ_SA1110
  1786. bool
  1787. config CPU_FREQ_INTEGRATOR
  1788. tristate "CPUfreq driver for ARM Integrator CPUs"
  1789. depends on ARCH_INTEGRATOR && CPU_FREQ
  1790. default y
  1791. help
  1792. This enables the CPUfreq driver for ARM Integrator CPUs.
  1793. For details, take a look at <file:Documentation/cpu-freq>.
  1794. If in doubt, say Y.
  1795. config CPU_FREQ_PXA
  1796. bool
  1797. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1798. default y
  1799. select CPU_FREQ_TABLE
  1800. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1801. config CPU_FREQ_S3C
  1802. bool
  1803. help
  1804. Internal configuration node for common cpufreq on Samsung SoC
  1805. config CPU_FREQ_S3C24XX
  1806. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1807. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1808. select CPU_FREQ_S3C
  1809. help
  1810. This enables the CPUfreq driver for the Samsung S3C24XX family
  1811. of CPUs.
  1812. For details, take a look at <file:Documentation/cpu-freq>.
  1813. If in doubt, say N.
  1814. config CPU_FREQ_S3C24XX_PLL
  1815. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1816. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1817. help
  1818. Compile in support for changing the PLL frequency from the
  1819. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1820. after a frequency change, so by default it is not enabled.
  1821. This also means that the PLL tables for the selected CPU(s) will
  1822. be built which may increase the size of the kernel image.
  1823. config CPU_FREQ_S3C24XX_DEBUG
  1824. bool "Debug CPUfreq Samsung driver core"
  1825. depends on CPU_FREQ_S3C24XX
  1826. help
  1827. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1828. config CPU_FREQ_S3C24XX_IODEBUG
  1829. bool "Debug CPUfreq Samsung driver IO timing"
  1830. depends on CPU_FREQ_S3C24XX
  1831. help
  1832. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1833. config CPU_FREQ_S3C24XX_DEBUGFS
  1834. bool "Export debugfs for CPUFreq"
  1835. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1836. help
  1837. Export status information via debugfs.
  1838. endif
  1839. source "drivers/cpuidle/Kconfig"
  1840. endmenu
  1841. menu "Floating point emulation"
  1842. comment "At least one emulation must be selected"
  1843. config FPE_NWFPE
  1844. bool "NWFPE math emulation"
  1845. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1846. ---help---
  1847. Say Y to include the NWFPE floating point emulator in the kernel.
  1848. This is necessary to run most binaries. Linux does not currently
  1849. support floating point hardware so you need to say Y here even if
  1850. your machine has an FPA or floating point co-processor podule.
  1851. You may say N here if you are going to load the Acorn FPEmulator
  1852. early in the bootup.
  1853. config FPE_NWFPE_XP
  1854. bool "Support extended precision"
  1855. depends on FPE_NWFPE
  1856. help
  1857. Say Y to include 80-bit support in the kernel floating-point
  1858. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1859. Note that gcc does not generate 80-bit operations by default,
  1860. so in most cases this option only enlarges the size of the
  1861. floating point emulator without any good reason.
  1862. You almost surely want to say N here.
  1863. config FPE_FASTFPE
  1864. bool "FastFPE math emulation (EXPERIMENTAL)"
  1865. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1866. ---help---
  1867. Say Y here to include the FAST floating point emulator in the kernel.
  1868. This is an experimental much faster emulator which now also has full
  1869. precision for the mantissa. It does not support any exceptions.
  1870. It is very simple, and approximately 3-6 times faster than NWFPE.
  1871. It should be sufficient for most programs. It may be not suitable
  1872. for scientific calculations, but you have to check this for yourself.
  1873. If you do not feel you need a faster FP emulation you should better
  1874. choose NWFPE.
  1875. config VFP
  1876. bool "VFP-format floating point maths"
  1877. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1878. help
  1879. Say Y to include VFP support code in the kernel. This is needed
  1880. if your hardware includes a VFP unit.
  1881. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1882. release notes and additional status information.
  1883. Say N if your target does not have VFP hardware.
  1884. config VFPv3
  1885. bool
  1886. depends on VFP
  1887. default y if CPU_V7
  1888. config NEON
  1889. bool "Advanced SIMD (NEON) Extension support"
  1890. depends on VFPv3 && CPU_V7
  1891. help
  1892. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1893. Extension.
  1894. endmenu
  1895. menu "Userspace binary formats"
  1896. source "fs/Kconfig.binfmt"
  1897. config ARTHUR
  1898. tristate "RISC OS personality"
  1899. depends on !AEABI
  1900. help
  1901. Say Y here to include the kernel code necessary if you want to run
  1902. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1903. experimental; if this sounds frightening, say N and sleep in peace.
  1904. You can also say M here to compile this support as a module (which
  1905. will be called arthur).
  1906. endmenu
  1907. menu "Power management options"
  1908. source "kernel/power/Kconfig"
  1909. config ARCH_SUSPEND_POSSIBLE
  1910. depends on !ARCH_S5PC100
  1911. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1912. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1913. def_bool y
  1914. config ARM_CPU_SUSPEND
  1915. def_bool PM_SLEEP
  1916. endmenu
  1917. source "net/Kconfig"
  1918. source "drivers/Kconfig"
  1919. source "fs/Kconfig"
  1920. source "arch/arm/Kconfig.debug"
  1921. source "security/Kconfig"
  1922. source "crypto/Kconfig"
  1923. source "lib/Kconfig"