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_ARCH_TRACEHOOK
  15. select HAVE_KPROBES if !XIP_KERNEL
  16. select HAVE_KRETPROBES if (HAVE_KPROBES)
  17. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  18. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  19. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  20. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  21. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  22. select HAVE_GENERIC_DMA_COHERENT
  23. select HAVE_KERNEL_GZIP
  24. select HAVE_KERNEL_LZO
  25. select HAVE_KERNEL_LZMA
  26. select HAVE_KERNEL_XZ
  27. select HAVE_IRQ_WORK
  28. select HAVE_PERF_EVENTS
  29. select PERF_USE_VMALLOC
  30. select HAVE_REGS_AND_STACK_ACCESS_API
  31. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  32. select HAVE_C_RECORDMCOUNT
  33. select HAVE_GENERIC_HARDIRQS
  34. select HARDIRQS_SW_RESEND
  35. select GENERIC_IRQ_PROBE
  36. select GENERIC_IRQ_SHOW
  37. select GENERIC_IRQ_PROBE
  38. select HARDIRQS_SW_RESEND
  39. select CPU_PM if (SUSPEND || CPU_IDLE)
  40. select GENERIC_PCI_IOMAP
  41. select HAVE_BPF_JIT
  42. select GENERIC_SMP_IDLE_THREAD
  43. help
  44. The ARM series is a line of low-power-consumption RISC chip designs
  45. licensed by ARM Ltd and targeted at embedded applications and
  46. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  47. manufactured, but legacy ARM-based PC hardware remains popular in
  48. Europe. There is an ARM Linux project with a web page at
  49. <http://www.arm.linux.org.uk/>.
  50. config ARM_HAS_SG_CHAIN
  51. bool
  52. config HAVE_PWM
  53. bool
  54. config MIGHT_HAVE_PCI
  55. bool
  56. config SYS_SUPPORTS_APM_EMULATION
  57. bool
  58. config GENERIC_GPIO
  59. bool
  60. config ARCH_USES_GETTIMEOFFSET
  61. bool
  62. default n
  63. config GENERIC_CLOCKEVENTS
  64. bool
  65. config GENERIC_CLOCKEVENTS_BROADCAST
  66. bool
  67. depends on GENERIC_CLOCKEVENTS
  68. default y if SMP
  69. config KTIME_SCALAR
  70. bool
  71. default y
  72. config HAVE_TCM
  73. bool
  74. select GENERIC_ALLOCATOR
  75. config HAVE_PROC_CPU
  76. bool
  77. config NO_IOPORT
  78. bool
  79. config EISA
  80. bool
  81. ---help---
  82. The Extended Industry Standard Architecture (EISA) bus was
  83. developed as an open alternative to the IBM MicroChannel bus.
  84. The EISA bus provided some of the features of the IBM MicroChannel
  85. bus while maintaining backward compatibility with cards made for
  86. the older ISA bus. The EISA bus saw limited use between 1988 and
  87. 1995 when it was made obsolete by the PCI bus.
  88. Say Y here if you are building a kernel for an EISA-based machine.
  89. Otherwise, say N.
  90. config SBUS
  91. bool
  92. config MCA
  93. bool
  94. help
  95. MicroChannel Architecture is found in some IBM PS/2 machines and
  96. laptops. It is a bus system similar to PCI or ISA. See
  97. <file:Documentation/mca.txt> (and especially the web page given
  98. there) before attempting to build an MCA bus kernel.
  99. config STACKTRACE_SUPPORT
  100. bool
  101. default y
  102. config HAVE_LATENCYTOP_SUPPORT
  103. bool
  104. depends on !SMP
  105. default y
  106. config LOCKDEP_SUPPORT
  107. bool
  108. default y
  109. config TRACE_IRQFLAGS_SUPPORT
  110. bool
  111. default y
  112. config GENERIC_LOCKBREAK
  113. bool
  114. default y
  115. depends on SMP && PREEMPT
  116. config RWSEM_GENERIC_SPINLOCK
  117. bool
  118. default y
  119. config RWSEM_XCHGADD_ALGORITHM
  120. bool
  121. config ARCH_HAS_ILOG2_U32
  122. bool
  123. config ARCH_HAS_ILOG2_U64
  124. bool
  125. config ARCH_HAS_CPUFREQ
  126. bool
  127. help
  128. Internal node to signify that the ARCH has CPUFREQ support
  129. and that the relevant menu configurations are displayed for
  130. it.
  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 ARCH_HAS_DMA_SET_COHERENT_MASK
  144. bool
  145. config GENERIC_ISA_DMA
  146. bool
  147. config FIQ
  148. bool
  149. config NEED_RET_TO_USER
  150. bool
  151. config ARCH_MTD_XIP
  152. bool
  153. config VECTORS_BASE
  154. hex
  155. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  156. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  157. default 0x00000000
  158. help
  159. The base address of exception vectors.
  160. config ARM_PATCH_PHYS_VIRT
  161. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  162. default y
  163. depends on !XIP_KERNEL && MMU
  164. depends on !ARCH_REALVIEW || !SPARSEMEM
  165. help
  166. Patch phys-to-virt and virt-to-phys translation functions at
  167. boot and module load time according to the position of the
  168. kernel in system memory.
  169. This can only be used with non-XIP MMU kernels where the base
  170. of physical memory is at a 16MB boundary.
  171. Only disable this option if you know that you do not require
  172. this feature (eg, building a kernel for a single machine) and
  173. you need to shrink the kernel to the minimal size.
  174. config NEED_MACH_IO_H
  175. bool
  176. help
  177. Select this when mach/io.h is required to provide special
  178. definitions for this platform. The need for mach/io.h should
  179. be avoided when possible.
  180. config NEED_MACH_MEMORY_H
  181. bool
  182. help
  183. Select this when mach/memory.h is required to provide special
  184. definitions for this platform. The need for mach/memory.h should
  185. be avoided when possible.
  186. config PHYS_OFFSET
  187. hex "Physical address of main memory" if MMU
  188. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  189. default DRAM_BASE if !MMU
  190. help
  191. Please provide the physical address corresponding to the
  192. location of main memory in your system.
  193. config GENERIC_BUG
  194. def_bool y
  195. depends on BUG
  196. source "init/Kconfig"
  197. source "kernel/Kconfig.freezer"
  198. menu "System Type"
  199. config MMU
  200. bool "MMU-based Paged Memory Management Support"
  201. default y
  202. help
  203. Select if you want MMU-based virtualised addressing space
  204. support by paged memory management. If unsure, say 'Y'.
  205. #
  206. # The "ARM system type" choice list is ordered alphabetically by option
  207. # text. Please add new entries in the option alphabetic order.
  208. #
  209. choice
  210. prompt "ARM system type"
  211. default ARCH_VERSATILE
  212. config ARCH_INTEGRATOR
  213. bool "ARM Ltd. Integrator family"
  214. select ARM_AMBA
  215. select ARCH_HAS_CPUFREQ
  216. select CLKDEV_LOOKUP
  217. select HAVE_MACH_CLKDEV
  218. select HAVE_TCM
  219. select ICST
  220. select GENERIC_CLOCKEVENTS
  221. select PLAT_VERSATILE
  222. select PLAT_VERSATILE_FPGA_IRQ
  223. select NEED_MACH_IO_H
  224. select NEED_MACH_MEMORY_H
  225. select SPARSE_IRQ
  226. select MULTI_IRQ_HANDLER
  227. help
  228. Support for ARM's Integrator platform.
  229. config ARCH_REALVIEW
  230. bool "ARM Ltd. RealView family"
  231. select ARM_AMBA
  232. select CLKDEV_LOOKUP
  233. select HAVE_MACH_CLKDEV
  234. select ICST
  235. select GENERIC_CLOCKEVENTS
  236. select ARCH_WANT_OPTIONAL_GPIOLIB
  237. select PLAT_VERSATILE
  238. select PLAT_VERSATILE_CLCD
  239. select ARM_TIMER_SP804
  240. select GPIO_PL061 if GPIOLIB
  241. select NEED_MACH_MEMORY_H
  242. help
  243. This enables support for ARM Ltd RealView boards.
  244. config ARCH_VERSATILE
  245. bool "ARM Ltd. Versatile family"
  246. select ARM_AMBA
  247. select ARM_VIC
  248. select CLKDEV_LOOKUP
  249. select HAVE_MACH_CLKDEV
  250. select ICST
  251. select GENERIC_CLOCKEVENTS
  252. select ARCH_WANT_OPTIONAL_GPIOLIB
  253. select PLAT_VERSATILE
  254. select PLAT_VERSATILE_CLCD
  255. select PLAT_VERSATILE_FPGA_IRQ
  256. select ARM_TIMER_SP804
  257. help
  258. This enables support for ARM Ltd Versatile board.
  259. config ARCH_VEXPRESS
  260. bool "ARM Ltd. Versatile Express family"
  261. select ARCH_WANT_OPTIONAL_GPIOLIB
  262. select ARM_AMBA
  263. select ARM_TIMER_SP804
  264. select CLKDEV_LOOKUP
  265. select HAVE_MACH_CLKDEV
  266. select GENERIC_CLOCKEVENTS
  267. select HAVE_CLK
  268. select HAVE_PATA_PLATFORM
  269. select ICST
  270. select NO_IOPORT
  271. select PLAT_VERSATILE
  272. select PLAT_VERSATILE_CLCD
  273. help
  274. This enables support for the ARM Ltd Versatile Express boards.
  275. config ARCH_AT91
  276. bool "Atmel AT91"
  277. select ARCH_REQUIRE_GPIOLIB
  278. select HAVE_CLK
  279. select CLKDEV_LOOKUP
  280. select IRQ_DOMAIN
  281. select NEED_MACH_IO_H if PCCARD
  282. help
  283. This enables support for systems based on Atmel
  284. AT91RM9200 and AT91SAM9* processors.
  285. config ARCH_BCMRING
  286. bool "Broadcom BCMRING"
  287. depends on MMU
  288. select CPU_V6
  289. select ARM_AMBA
  290. select ARM_TIMER_SP804
  291. select CLKDEV_LOOKUP
  292. select GENERIC_CLOCKEVENTS
  293. select ARCH_WANT_OPTIONAL_GPIOLIB
  294. help
  295. Support for Broadcom's BCMRing platform.
  296. config ARCH_HIGHBANK
  297. bool "Calxeda Highbank-based"
  298. select ARCH_WANT_OPTIONAL_GPIOLIB
  299. select ARM_AMBA
  300. select ARM_GIC
  301. select ARM_TIMER_SP804
  302. select CACHE_L2X0
  303. select CLKDEV_LOOKUP
  304. select CPU_V7
  305. select GENERIC_CLOCKEVENTS
  306. select HAVE_ARM_SCU
  307. select HAVE_SMP
  308. select SPARSE_IRQ
  309. select USE_OF
  310. help
  311. Support for the Calxeda Highbank SoC based boards.
  312. config ARCH_CLPS711X
  313. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  314. select CPU_ARM720T
  315. select ARCH_USES_GETTIMEOFFSET
  316. select NEED_MACH_MEMORY_H
  317. help
  318. Support for Cirrus Logic 711x/721x/731x based boards.
  319. config ARCH_CNS3XXX
  320. bool "Cavium Networks CNS3XXX family"
  321. select CPU_V6K
  322. select GENERIC_CLOCKEVENTS
  323. select ARM_GIC
  324. select MIGHT_HAVE_CACHE_L2X0
  325. select MIGHT_HAVE_PCI
  326. select PCI_DOMAINS if PCI
  327. help
  328. Support for Cavium Networks CNS3XXX platform.
  329. config ARCH_GEMINI
  330. bool "Cortina Systems Gemini"
  331. select CPU_FA526
  332. select ARCH_REQUIRE_GPIOLIB
  333. select ARCH_USES_GETTIMEOFFSET
  334. help
  335. Support for the Cortina Systems Gemini family SoCs
  336. config ARCH_PRIMA2
  337. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  338. select CPU_V7
  339. select NO_IOPORT
  340. select GENERIC_CLOCKEVENTS
  341. select CLKDEV_LOOKUP
  342. select GENERIC_IRQ_CHIP
  343. select MIGHT_HAVE_CACHE_L2X0
  344. select USE_OF
  345. select ZONE_DMA
  346. help
  347. Support for CSR SiRFSoC ARM Cortex A9 Platform
  348. config ARCH_EBSA110
  349. bool "EBSA-110"
  350. select CPU_SA110
  351. select ISA
  352. select NO_IOPORT
  353. select ARCH_USES_GETTIMEOFFSET
  354. select NEED_MACH_IO_H
  355. select NEED_MACH_MEMORY_H
  356. help
  357. This is an evaluation board for the StrongARM processor available
  358. from Digital. It has limited hardware on-board, including an
  359. Ethernet interface, two PCMCIA sockets, two serial ports and a
  360. parallel port.
  361. config ARCH_EP93XX
  362. bool "EP93xx-based"
  363. select CPU_ARM920T
  364. select ARM_AMBA
  365. select ARM_VIC
  366. select CLKDEV_LOOKUP
  367. select ARCH_REQUIRE_GPIOLIB
  368. select ARCH_HAS_HOLES_MEMORYMODEL
  369. select ARCH_USES_GETTIMEOFFSET
  370. select NEED_MACH_MEMORY_H
  371. help
  372. This enables support for the Cirrus EP93xx series of CPUs.
  373. config ARCH_FOOTBRIDGE
  374. bool "FootBridge"
  375. select CPU_SA110
  376. select FOOTBRIDGE
  377. select GENERIC_CLOCKEVENTS
  378. select HAVE_IDE
  379. select NEED_MACH_IO_H
  380. select NEED_MACH_MEMORY_H
  381. help
  382. Support for systems based on the DC21285 companion chip
  383. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  384. config ARCH_MXC
  385. bool "Freescale MXC/iMX-based"
  386. select GENERIC_CLOCKEVENTS
  387. select ARCH_REQUIRE_GPIOLIB
  388. select CLKDEV_LOOKUP
  389. select CLKSRC_MMIO
  390. select GENERIC_IRQ_CHIP
  391. select MULTI_IRQ_HANDLER
  392. help
  393. Support for Freescale MXC/iMX-based family of processors
  394. config ARCH_MXS
  395. bool "Freescale MXS-based"
  396. select GENERIC_CLOCKEVENTS
  397. select ARCH_REQUIRE_GPIOLIB
  398. select CLKDEV_LOOKUP
  399. select CLKSRC_MMIO
  400. select HAVE_CLK_PREPARE
  401. help
  402. Support for Freescale MXS-based family of processors
  403. config ARCH_NETX
  404. bool "Hilscher NetX based"
  405. select CLKSRC_MMIO
  406. select CPU_ARM926T
  407. select ARM_VIC
  408. select GENERIC_CLOCKEVENTS
  409. help
  410. This enables support for systems based on the Hilscher NetX Soc
  411. config ARCH_H720X
  412. bool "Hynix HMS720x-based"
  413. select CPU_ARM720T
  414. select ISA_DMA_API
  415. select ARCH_USES_GETTIMEOFFSET
  416. help
  417. This enables support for systems based on the Hynix HMS720x
  418. config ARCH_IOP13XX
  419. bool "IOP13xx-based"
  420. depends on MMU
  421. select CPU_XSC3
  422. select PLAT_IOP
  423. select PCI
  424. select ARCH_SUPPORTS_MSI
  425. select VMSPLIT_1G
  426. select NEED_MACH_IO_H
  427. select NEED_MACH_MEMORY_H
  428. select NEED_RET_TO_USER
  429. help
  430. Support for Intel's IOP13XX (XScale) family of processors.
  431. config ARCH_IOP32X
  432. bool "IOP32x-based"
  433. depends on MMU
  434. select CPU_XSCALE
  435. select NEED_MACH_IO_H
  436. select NEED_RET_TO_USER
  437. select PLAT_IOP
  438. select PCI
  439. select ARCH_REQUIRE_GPIOLIB
  440. help
  441. Support for Intel's 80219 and IOP32X (XScale) family of
  442. processors.
  443. config ARCH_IOP33X
  444. bool "IOP33x-based"
  445. depends on MMU
  446. select CPU_XSCALE
  447. select NEED_MACH_IO_H
  448. select NEED_RET_TO_USER
  449. select PLAT_IOP
  450. select PCI
  451. select ARCH_REQUIRE_GPIOLIB
  452. help
  453. Support for Intel's IOP33X (XScale) family of processors.
  454. config ARCH_IXP4XX
  455. bool "IXP4xx-based"
  456. depends on MMU
  457. select ARCH_HAS_DMA_SET_COHERENT_MASK
  458. select CLKSRC_MMIO
  459. select CPU_XSCALE
  460. select GENERIC_GPIO
  461. select GENERIC_CLOCKEVENTS
  462. select MIGHT_HAVE_PCI
  463. select NEED_MACH_IO_H
  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 NEED_MACH_IO_H
  474. select PLAT_ORION
  475. help
  476. Support for the Marvell Dove SoC 88AP510
  477. config ARCH_KIRKWOOD
  478. bool "Marvell Kirkwood"
  479. select CPU_FEROCEON
  480. select PCI
  481. select ARCH_REQUIRE_GPIOLIB
  482. select GENERIC_CLOCKEVENTS
  483. select NEED_MACH_IO_H
  484. select PLAT_ORION
  485. help
  486. Support for the following Marvell Kirkwood series SoCs:
  487. 88F6180, 88F6192 and 88F6281.
  488. config ARCH_LPC32XX
  489. bool "NXP LPC32XX"
  490. select CLKSRC_MMIO
  491. select CPU_ARM926T
  492. select ARCH_REQUIRE_GPIOLIB
  493. select HAVE_IDE
  494. select ARM_AMBA
  495. select USB_ARCH_HAS_OHCI
  496. select CLKDEV_LOOKUP
  497. select GENERIC_CLOCKEVENTS
  498. help
  499. Support for the NXP LPC32XX family of processors
  500. config ARCH_MV78XX0
  501. bool "Marvell MV78xx0"
  502. select CPU_FEROCEON
  503. select PCI
  504. select ARCH_REQUIRE_GPIOLIB
  505. select GENERIC_CLOCKEVENTS
  506. select NEED_MACH_IO_H
  507. select PLAT_ORION
  508. help
  509. Support for the following Marvell MV78xx0 series SoCs:
  510. MV781x0, MV782x0.
  511. config ARCH_ORION5X
  512. bool "Marvell Orion"
  513. depends on MMU
  514. select CPU_FEROCEON
  515. select PCI
  516. select ARCH_REQUIRE_GPIOLIB
  517. select GENERIC_CLOCKEVENTS
  518. select PLAT_ORION
  519. help
  520. Support for the following Marvell Orion 5x series SoCs:
  521. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  522. Orion-2 (5281), Orion-1-90 (6183).
  523. config ARCH_MMP
  524. bool "Marvell PXA168/910/MMP2"
  525. depends on MMU
  526. select ARCH_REQUIRE_GPIOLIB
  527. select CLKDEV_LOOKUP
  528. select GENERIC_CLOCKEVENTS
  529. select GPIO_PXA
  530. select PLAT_PXA
  531. select SPARSE_IRQ
  532. select GENERIC_ALLOCATOR
  533. help
  534. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  535. config ARCH_KS8695
  536. bool "Micrel/Kendin KS8695"
  537. select CPU_ARM922T
  538. select ARCH_REQUIRE_GPIOLIB
  539. select ARCH_USES_GETTIMEOFFSET
  540. select NEED_MACH_MEMORY_H
  541. help
  542. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  543. System-on-Chip devices.
  544. config ARCH_W90X900
  545. bool "Nuvoton W90X900 CPU"
  546. select CPU_ARM926T
  547. select ARCH_REQUIRE_GPIOLIB
  548. select CLKDEV_LOOKUP
  549. select CLKSRC_MMIO
  550. select GENERIC_CLOCKEVENTS
  551. help
  552. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  553. At present, the w90x900 has been renamed nuc900, regarding
  554. the ARM series product line, you can login the following
  555. link address to know more.
  556. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  557. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  558. config ARCH_TEGRA
  559. bool "NVIDIA Tegra"
  560. select CLKDEV_LOOKUP
  561. select CLKSRC_MMIO
  562. select GENERIC_CLOCKEVENTS
  563. select GENERIC_GPIO
  564. select HAVE_CLK
  565. select HAVE_SMP
  566. select MIGHT_HAVE_CACHE_L2X0
  567. select NEED_MACH_IO_H if PCI
  568. select ARCH_HAS_CPUFREQ
  569. help
  570. This enables support for NVIDIA Tegra based systems (Tegra APX,
  571. Tegra 6xx and Tegra 2 series).
  572. config ARCH_PICOXCELL
  573. bool "Picochip picoXcell"
  574. select ARCH_REQUIRE_GPIOLIB
  575. select ARM_PATCH_PHYS_VIRT
  576. select ARM_VIC
  577. select CPU_V6K
  578. select DW_APB_TIMER
  579. select GENERIC_CLOCKEVENTS
  580. select GENERIC_GPIO
  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 PLAT_PXA
  607. select SPARSE_IRQ
  608. select AUTO_ZRELADDR
  609. select MULTI_IRQ_HANDLER
  610. select ARM_CPU_SUSPEND if PM
  611. select HAVE_IDE
  612. help
  613. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  614. config ARCH_MSM
  615. bool "Qualcomm MSM"
  616. select HAVE_CLK
  617. select GENERIC_CLOCKEVENTS
  618. select ARCH_REQUIRE_GPIOLIB
  619. select CLKDEV_LOOKUP
  620. help
  621. Support for Qualcomm MSM/QSD based systems. This runs on the
  622. apps processor of the MSM/QSD and depends on a shared memory
  623. interface to the modem processor which runs the baseband
  624. stack and controls some vital subsystems
  625. (clock and power control, etc).
  626. config ARCH_SHMOBILE
  627. bool "Renesas SH-Mobile / R-Mobile"
  628. select HAVE_CLK
  629. select CLKDEV_LOOKUP
  630. select HAVE_MACH_CLKDEV
  631. select HAVE_SMP
  632. select GENERIC_CLOCKEVENTS
  633. select MIGHT_HAVE_CACHE_L2X0
  634. select NO_IOPORT
  635. select SPARSE_IRQ
  636. select MULTI_IRQ_HANDLER
  637. select PM_GENERIC_DOMAINS if PM
  638. select NEED_MACH_MEMORY_H
  639. help
  640. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  641. config ARCH_RPC
  642. bool "RiscPC"
  643. select ARCH_ACORN
  644. select FIQ
  645. select ARCH_MAY_HAVE_PC_FDC
  646. select HAVE_PATA_PLATFORM
  647. select ISA_DMA_API
  648. select NO_IOPORT
  649. select ARCH_SPARSEMEM_ENABLE
  650. select ARCH_USES_GETTIMEOFFSET
  651. select HAVE_IDE
  652. select NEED_MACH_IO_H
  653. select NEED_MACH_MEMORY_H
  654. help
  655. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  656. CD-ROM interface, serial and parallel port, and the floppy drive.
  657. config ARCH_SA1100
  658. bool "SA1100-based"
  659. select CLKSRC_MMIO
  660. select CPU_SA1100
  661. select ISA
  662. select ARCH_SPARSEMEM_ENABLE
  663. select ARCH_MTD_XIP
  664. select ARCH_HAS_CPUFREQ
  665. select CPU_FREQ
  666. select GENERIC_CLOCKEVENTS
  667. select CLKDEV_LOOKUP
  668. select ARCH_REQUIRE_GPIOLIB
  669. select HAVE_IDE
  670. select NEED_MACH_MEMORY_H
  671. select SPARSE_IRQ
  672. help
  673. Support for StrongARM 11x0 based boards.
  674. config ARCH_S3C24XX
  675. bool "Samsung S3C24XX SoCs"
  676. select GENERIC_GPIO
  677. select ARCH_HAS_CPUFREQ
  678. select HAVE_CLK
  679. select CLKDEV_LOOKUP
  680. select ARCH_USES_GETTIMEOFFSET
  681. select HAVE_S3C2410_I2C if I2C
  682. select HAVE_S3C_RTC if RTC_CLASS
  683. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  684. select NEED_MACH_IO_H
  685. help
  686. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  687. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  688. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  689. Samsung SMDK2410 development board (and derivatives).
  690. config ARCH_S3C64XX
  691. bool "Samsung S3C64XX"
  692. select PLAT_SAMSUNG
  693. select CPU_V6
  694. select ARM_VIC
  695. select HAVE_CLK
  696. select HAVE_TCM
  697. select CLKDEV_LOOKUP
  698. select NO_IOPORT
  699. select ARCH_USES_GETTIMEOFFSET
  700. select ARCH_HAS_CPUFREQ
  701. select ARCH_REQUIRE_GPIOLIB
  702. select SAMSUNG_CLKSRC
  703. select SAMSUNG_IRQ_VIC_TIMER
  704. select S3C_GPIO_TRACK
  705. select S3C_DEV_NAND
  706. select USB_ARCH_HAS_OHCI
  707. select SAMSUNG_GPIOLIB_4BIT
  708. select HAVE_S3C2410_I2C if I2C
  709. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  710. help
  711. Samsung S3C64XX series based systems
  712. config ARCH_S5P64X0
  713. bool "Samsung S5P6440 S5P6450"
  714. select CPU_V6
  715. select GENERIC_GPIO
  716. select HAVE_CLK
  717. select CLKDEV_LOOKUP
  718. select CLKSRC_MMIO
  719. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  720. select GENERIC_CLOCKEVENTS
  721. select HAVE_S3C2410_I2C if I2C
  722. select HAVE_S3C_RTC if RTC_CLASS
  723. help
  724. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  725. SMDK6450.
  726. config ARCH_S5PC100
  727. bool "Samsung S5PC100"
  728. select GENERIC_GPIO
  729. select HAVE_CLK
  730. select CLKDEV_LOOKUP
  731. select CPU_V7
  732. select ARCH_USES_GETTIMEOFFSET
  733. select HAVE_S3C2410_I2C if I2C
  734. select HAVE_S3C_RTC if RTC_CLASS
  735. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  736. help
  737. Samsung S5PC100 series based systems
  738. config ARCH_S5PV210
  739. bool "Samsung S5PV210/S5PC110"
  740. select CPU_V7
  741. select ARCH_SPARSEMEM_ENABLE
  742. select ARCH_HAS_HOLES_MEMORYMODEL
  743. select GENERIC_GPIO
  744. select HAVE_CLK
  745. select CLKDEV_LOOKUP
  746. select CLKSRC_MMIO
  747. select ARCH_HAS_CPUFREQ
  748. select GENERIC_CLOCKEVENTS
  749. select HAVE_S3C2410_I2C if I2C
  750. select HAVE_S3C_RTC if RTC_CLASS
  751. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  752. select NEED_MACH_MEMORY_H
  753. help
  754. Samsung S5PV210/S5PC110 series based systems
  755. config ARCH_EXYNOS
  756. bool "SAMSUNG EXYNOS"
  757. select CPU_V7
  758. select ARCH_SPARSEMEM_ENABLE
  759. select ARCH_HAS_HOLES_MEMORYMODEL
  760. select GENERIC_GPIO
  761. select HAVE_CLK
  762. select CLKDEV_LOOKUP
  763. select ARCH_HAS_CPUFREQ
  764. select GENERIC_CLOCKEVENTS
  765. select HAVE_S3C_RTC if RTC_CLASS
  766. select HAVE_S3C2410_I2C if I2C
  767. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  768. select NEED_MACH_MEMORY_H
  769. help
  770. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  771. config ARCH_SHARK
  772. bool "Shark"
  773. select CPU_SA110
  774. select ISA
  775. select ISA_DMA
  776. select ZONE_DMA
  777. select PCI
  778. select ARCH_USES_GETTIMEOFFSET
  779. select NEED_MACH_MEMORY_H
  780. select NEED_MACH_IO_H
  781. help
  782. Support for the StrongARM based Digital DNARD machine, also known
  783. as "Shark" (<http://www.shark-linux.de/shark.html>).
  784. config ARCH_U300
  785. bool "ST-Ericsson U300 Series"
  786. depends on MMU
  787. select CLKSRC_MMIO
  788. select CPU_ARM926T
  789. select HAVE_TCM
  790. select ARM_AMBA
  791. select ARM_PATCH_PHYS_VIRT
  792. select ARM_VIC
  793. select GENERIC_CLOCKEVENTS
  794. select CLKDEV_LOOKUP
  795. select HAVE_MACH_CLKDEV
  796. select GENERIC_GPIO
  797. select ARCH_REQUIRE_GPIOLIB
  798. help
  799. Support for ST-Ericsson U300 series mobile platforms.
  800. config ARCH_U8500
  801. bool "ST-Ericsson U8500 Series"
  802. depends on MMU
  803. select CPU_V7
  804. select ARM_AMBA
  805. select GENERIC_CLOCKEVENTS
  806. select CLKDEV_LOOKUP
  807. select ARCH_REQUIRE_GPIOLIB
  808. select ARCH_HAS_CPUFREQ
  809. select HAVE_SMP
  810. select MIGHT_HAVE_CACHE_L2X0
  811. help
  812. Support for ST-Ericsson's Ux500 architecture
  813. config ARCH_NOMADIK
  814. bool "STMicroelectronics Nomadik"
  815. select ARM_AMBA
  816. select ARM_VIC
  817. select CPU_ARM926T
  818. select CLKDEV_LOOKUP
  819. select GENERIC_CLOCKEVENTS
  820. select MIGHT_HAVE_CACHE_L2X0
  821. select ARCH_REQUIRE_GPIOLIB
  822. help
  823. Support for the Nomadik platform by ST-Ericsson
  824. config ARCH_DAVINCI
  825. bool "TI DaVinci"
  826. select GENERIC_CLOCKEVENTS
  827. select ARCH_REQUIRE_GPIOLIB
  828. select ZONE_DMA
  829. select HAVE_IDE
  830. select CLKDEV_LOOKUP
  831. select GENERIC_ALLOCATOR
  832. select GENERIC_IRQ_CHIP
  833. select ARCH_HAS_HOLES_MEMORYMODEL
  834. help
  835. Support for TI's DaVinci platform.
  836. config ARCH_OMAP
  837. bool "TI OMAP"
  838. select HAVE_CLK
  839. select ARCH_REQUIRE_GPIOLIB
  840. select ARCH_HAS_CPUFREQ
  841. select CLKSRC_MMIO
  842. select GENERIC_CLOCKEVENTS
  843. select ARCH_HAS_HOLES_MEMORYMODEL
  844. help
  845. Support for TI's OMAP platform (OMAP1/2/3/4).
  846. config PLAT_SPEAR
  847. bool "ST SPEAr"
  848. select ARM_AMBA
  849. select ARCH_REQUIRE_GPIOLIB
  850. select CLKDEV_LOOKUP
  851. select CLKSRC_MMIO
  852. select GENERIC_CLOCKEVENTS
  853. select HAVE_CLK
  854. help
  855. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  856. config ARCH_VT8500
  857. bool "VIA/WonderMedia 85xx"
  858. select CPU_ARM926T
  859. select GENERIC_GPIO
  860. select ARCH_HAS_CPUFREQ
  861. select GENERIC_CLOCKEVENTS
  862. select ARCH_REQUIRE_GPIOLIB
  863. select HAVE_PWM
  864. help
  865. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  866. config ARCH_ZYNQ
  867. bool "Xilinx Zynq ARM Cortex A9 Platform"
  868. select CPU_V7
  869. select GENERIC_CLOCKEVENTS
  870. select CLKDEV_LOOKUP
  871. select ARM_GIC
  872. select ARM_AMBA
  873. select ICST
  874. select MIGHT_HAVE_CACHE_L2X0
  875. select USE_OF
  876. help
  877. Support for Xilinx Zynq ARM Cortex A9 Platform
  878. endchoice
  879. #
  880. # This is sorted alphabetically by mach-* pathname. However, plat-*
  881. # Kconfigs may be included either alphabetically (according to the
  882. # plat- suffix) or along side the corresponding mach-* source.
  883. #
  884. source "arch/arm/mach-at91/Kconfig"
  885. source "arch/arm/mach-bcmring/Kconfig"
  886. source "arch/arm/mach-clps711x/Kconfig"
  887. source "arch/arm/mach-cns3xxx/Kconfig"
  888. source "arch/arm/mach-davinci/Kconfig"
  889. source "arch/arm/mach-dove/Kconfig"
  890. source "arch/arm/mach-ep93xx/Kconfig"
  891. source "arch/arm/mach-footbridge/Kconfig"
  892. source "arch/arm/mach-gemini/Kconfig"
  893. source "arch/arm/mach-h720x/Kconfig"
  894. source "arch/arm/mach-integrator/Kconfig"
  895. source "arch/arm/mach-iop32x/Kconfig"
  896. source "arch/arm/mach-iop33x/Kconfig"
  897. source "arch/arm/mach-iop13xx/Kconfig"
  898. source "arch/arm/mach-ixp4xx/Kconfig"
  899. source "arch/arm/mach-kirkwood/Kconfig"
  900. source "arch/arm/mach-ks8695/Kconfig"
  901. source "arch/arm/mach-lpc32xx/Kconfig"
  902. source "arch/arm/mach-msm/Kconfig"
  903. source "arch/arm/mach-mv78xx0/Kconfig"
  904. source "arch/arm/plat-mxc/Kconfig"
  905. source "arch/arm/mach-mxs/Kconfig"
  906. source "arch/arm/mach-netx/Kconfig"
  907. source "arch/arm/mach-nomadik/Kconfig"
  908. source "arch/arm/plat-nomadik/Kconfig"
  909. source "arch/arm/plat-omap/Kconfig"
  910. source "arch/arm/mach-omap1/Kconfig"
  911. source "arch/arm/mach-omap2/Kconfig"
  912. source "arch/arm/mach-orion5x/Kconfig"
  913. source "arch/arm/mach-pxa/Kconfig"
  914. source "arch/arm/plat-pxa/Kconfig"
  915. source "arch/arm/mach-mmp/Kconfig"
  916. source "arch/arm/mach-realview/Kconfig"
  917. source "arch/arm/mach-sa1100/Kconfig"
  918. source "arch/arm/plat-samsung/Kconfig"
  919. source "arch/arm/plat-s3c24xx/Kconfig"
  920. source "arch/arm/plat-s5p/Kconfig"
  921. source "arch/arm/plat-spear/Kconfig"
  922. source "arch/arm/mach-s3c24xx/Kconfig"
  923. if ARCH_S3C24XX
  924. source "arch/arm/mach-s3c2412/Kconfig"
  925. source "arch/arm/mach-s3c2440/Kconfig"
  926. endif
  927. if ARCH_S3C64XX
  928. source "arch/arm/mach-s3c64xx/Kconfig"
  929. endif
  930. source "arch/arm/mach-s5p64x0/Kconfig"
  931. source "arch/arm/mach-s5pc100/Kconfig"
  932. source "arch/arm/mach-s5pv210/Kconfig"
  933. source "arch/arm/mach-exynos/Kconfig"
  934. source "arch/arm/mach-shmobile/Kconfig"
  935. source "arch/arm/mach-tegra/Kconfig"
  936. source "arch/arm/mach-u300/Kconfig"
  937. source "arch/arm/mach-ux500/Kconfig"
  938. source "arch/arm/mach-versatile/Kconfig"
  939. source "arch/arm/mach-vexpress/Kconfig"
  940. source "arch/arm/plat-versatile/Kconfig"
  941. source "arch/arm/mach-vt8500/Kconfig"
  942. source "arch/arm/mach-w90x900/Kconfig"
  943. # Definitions to make life easier
  944. config ARCH_ACORN
  945. bool
  946. config PLAT_IOP
  947. bool
  948. select GENERIC_CLOCKEVENTS
  949. config PLAT_ORION
  950. bool
  951. select CLKSRC_MMIO
  952. select GENERIC_IRQ_CHIP
  953. config PLAT_PXA
  954. bool
  955. config PLAT_VERSATILE
  956. bool
  957. config ARM_TIMER_SP804
  958. bool
  959. select CLKSRC_MMIO
  960. select HAVE_SCHED_CLOCK
  961. source arch/arm/mm/Kconfig
  962. config ARM_NR_BANKS
  963. int
  964. default 16 if ARCH_EP93XX
  965. default 8
  966. config IWMMXT
  967. bool "Enable iWMMXt support"
  968. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  969. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  970. help
  971. Enable support for iWMMXt context switching at run time if
  972. running on a CPU that supports it.
  973. config XSCALE_PMU
  974. bool
  975. depends on CPU_XSCALE
  976. default y
  977. config CPU_HAS_PMU
  978. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  979. (!ARCH_OMAP3 || OMAP3_EMU)
  980. default y
  981. bool
  982. config MULTI_IRQ_HANDLER
  983. bool
  984. help
  985. Allow each machine to specify it's own IRQ handler at run time.
  986. if !MMU
  987. source "arch/arm/Kconfig-nommu"
  988. endif
  989. config ARM_ERRATA_326103
  990. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  991. depends on CPU_V6
  992. help
  993. Executing a SWP instruction to read-only memory does not set bit 11
  994. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  995. treat the access as a read, preventing a COW from occurring and
  996. causing the faulting task to livelock.
  997. config ARM_ERRATA_411920
  998. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  999. depends on CPU_V6 || CPU_V6K
  1000. help
  1001. Invalidation of the Instruction Cache operation can
  1002. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1003. It does not affect the MPCore. This option enables the ARM Ltd.
  1004. recommended workaround.
  1005. config ARM_ERRATA_430973
  1006. bool "ARM errata: Stale prediction on replaced interworking branch"
  1007. depends on CPU_V7
  1008. help
  1009. This option enables the workaround for the 430973 Cortex-A8
  1010. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1011. interworking branch is replaced with another code sequence at the
  1012. same virtual address, whether due to self-modifying code or virtual
  1013. to physical address re-mapping, Cortex-A8 does not recover from the
  1014. stale interworking branch prediction. This results in Cortex-A8
  1015. executing the new code sequence in the incorrect ARM or Thumb state.
  1016. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1017. and also flushes the branch target cache at every context switch.
  1018. Note that setting specific bits in the ACTLR register may not be
  1019. available in non-secure mode.
  1020. config ARM_ERRATA_458693
  1021. bool "ARM errata: Processor deadlock when a false hazard is created"
  1022. depends on CPU_V7
  1023. help
  1024. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1025. erratum. For very specific sequences of memory operations, it is
  1026. possible for a hazard condition intended for a cache line to instead
  1027. be incorrectly associated with a different cache line. This false
  1028. hazard might then cause a processor deadlock. The workaround enables
  1029. the L1 caching of the NEON accesses and disables the PLD instruction
  1030. in the ACTLR register. Note that setting specific bits in the ACTLR
  1031. register may not be available in non-secure mode.
  1032. config ARM_ERRATA_460075
  1033. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1034. depends on CPU_V7
  1035. help
  1036. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1037. erratum. Any asynchronous access to the L2 cache may encounter a
  1038. situation in which recent store transactions to the L2 cache are lost
  1039. and overwritten with stale memory contents from external memory. The
  1040. workaround disables the write-allocate mode for the L2 cache via the
  1041. ACTLR register. Note that setting specific bits in the ACTLR register
  1042. may not be available in non-secure mode.
  1043. config ARM_ERRATA_742230
  1044. bool "ARM errata: DMB operation may be faulty"
  1045. depends on CPU_V7 && SMP
  1046. help
  1047. This option enables the workaround for the 742230 Cortex-A9
  1048. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1049. between two write operations may not ensure the correct visibility
  1050. ordering of the two writes. This workaround sets a specific bit in
  1051. the diagnostic register of the Cortex-A9 which causes the DMB
  1052. instruction to behave as a DSB, ensuring the correct behaviour of
  1053. the two writes.
  1054. config ARM_ERRATA_742231
  1055. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1056. depends on CPU_V7 && SMP
  1057. help
  1058. This option enables the workaround for the 742231 Cortex-A9
  1059. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1060. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1061. accessing some data located in the same cache line, may get corrupted
  1062. data due to bad handling of the address hazard when the line gets
  1063. replaced from one of the CPUs at the same time as another CPU is
  1064. accessing it. This workaround sets specific bits in the diagnostic
  1065. register of the Cortex-A9 which reduces the linefill issuing
  1066. capabilities of the processor.
  1067. config PL310_ERRATA_588369
  1068. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1069. depends on CACHE_L2X0
  1070. help
  1071. The PL310 L2 cache controller implements three types of Clean &
  1072. Invalidate maintenance operations: by Physical Address
  1073. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1074. They are architecturally defined to behave as the execution of a
  1075. clean operation followed immediately by an invalidate operation,
  1076. both performing to the same memory location. This functionality
  1077. is not correctly implemented in PL310 as clean lines are not
  1078. invalidated as a result of these operations.
  1079. config ARM_ERRATA_720789
  1080. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1081. depends on CPU_V7
  1082. help
  1083. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1084. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1085. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1086. As a consequence of this erratum, some TLB entries which should be
  1087. invalidated are not, resulting in an incoherency in the system page
  1088. tables. The workaround changes the TLB flushing routines to invalidate
  1089. entries regardless of the ASID.
  1090. config PL310_ERRATA_727915
  1091. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1092. depends on CACHE_L2X0
  1093. help
  1094. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1095. operation (offset 0x7FC). This operation runs in background so that
  1096. PL310 can handle normal accesses while it is in progress. Under very
  1097. rare circumstances, due to this erratum, write data can be lost when
  1098. PL310 treats a cacheable write transaction during a Clean &
  1099. Invalidate by Way operation.
  1100. config ARM_ERRATA_743622
  1101. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1102. depends on CPU_V7
  1103. help
  1104. This option enables the workaround for the 743622 Cortex-A9
  1105. (r2p*) erratum. Under very rare conditions, a faulty
  1106. optimisation in the Cortex-A9 Store Buffer may lead to data
  1107. corruption. This workaround sets a specific bit in the diagnostic
  1108. register of the Cortex-A9 which disables the Store Buffer
  1109. optimisation, preventing the defect from occurring. This has no
  1110. visible impact on the overall performance or power consumption of the
  1111. processor.
  1112. config ARM_ERRATA_751472
  1113. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1114. depends on CPU_V7
  1115. help
  1116. This option enables the workaround for the 751472 Cortex-A9 (prior
  1117. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1118. completion of a following broadcasted operation if the second
  1119. operation is received by a CPU before the ICIALLUIS has completed,
  1120. potentially leading to corrupted entries in the cache or TLB.
  1121. config PL310_ERRATA_753970
  1122. bool "PL310 errata: cache sync operation may be faulty"
  1123. depends on CACHE_PL310
  1124. help
  1125. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1126. Under some condition the effect of cache sync operation on
  1127. the store buffer still remains when the operation completes.
  1128. This means that the store buffer is always asked to drain and
  1129. this prevents it from merging any further writes. The workaround
  1130. is to replace the normal offset of cache sync operation (0x730)
  1131. by another offset targeting an unmapped PL310 register 0x740.
  1132. This has the same effect as the cache sync operation: store buffer
  1133. drain and waiting for all buffers empty.
  1134. config ARM_ERRATA_754322
  1135. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1136. depends on CPU_V7
  1137. help
  1138. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1139. r3p*) erratum. A speculative memory access may cause a page table walk
  1140. which starts prior to an ASID switch but completes afterwards. This
  1141. can populate the micro-TLB with a stale entry which may be hit with
  1142. the new ASID. This workaround places two dsb instructions in the mm
  1143. switching code so that no page table walks can cross the ASID switch.
  1144. config ARM_ERRATA_754327
  1145. bool "ARM errata: no automatic Store Buffer drain"
  1146. depends on CPU_V7 && SMP
  1147. help
  1148. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1149. r2p0) erratum. The Store Buffer does not have any automatic draining
  1150. mechanism and therefore a livelock may occur if an external agent
  1151. continuously polls a memory location waiting to observe an update.
  1152. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1153. written polling loops from denying visibility of updates to memory.
  1154. config ARM_ERRATA_364296
  1155. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1156. depends on CPU_V6 && !SMP
  1157. help
  1158. This options enables the workaround for the 364296 ARM1136
  1159. r0p2 erratum (possible cache data corruption with
  1160. hit-under-miss enabled). It sets the undocumented bit 31 in
  1161. the auxiliary control register and the FI bit in the control
  1162. register, thus disabling hit-under-miss without putting the
  1163. processor into full low interrupt latency mode. ARM11MPCore
  1164. is not affected.
  1165. config ARM_ERRATA_764369
  1166. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1167. depends on CPU_V7 && SMP
  1168. help
  1169. This option enables the workaround for erratum 764369
  1170. affecting Cortex-A9 MPCore with two or more processors (all
  1171. current revisions). Under certain timing circumstances, a data
  1172. cache line maintenance operation by MVA targeting an Inner
  1173. Shareable memory region may fail to proceed up to either the
  1174. Point of Coherency or to the Point of Unification of the
  1175. system. This workaround adds a DSB instruction before the
  1176. relevant cache maintenance functions and sets a specific bit
  1177. in the diagnostic control register of the SCU.
  1178. config PL310_ERRATA_769419
  1179. bool "PL310 errata: no automatic Store Buffer drain"
  1180. depends on CACHE_L2X0
  1181. help
  1182. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1183. not automatically drain. This can cause normal, non-cacheable
  1184. writes to be retained when the memory system is idle, leading
  1185. to suboptimal I/O performance for drivers using coherent DMA.
  1186. This option adds a write barrier to the cpu_idle loop so that,
  1187. on systems with an outer cache, the store buffer is drained
  1188. explicitly.
  1189. endmenu
  1190. source "arch/arm/common/Kconfig"
  1191. menu "Bus support"
  1192. config ARM_AMBA
  1193. bool
  1194. config ISA
  1195. bool
  1196. help
  1197. Find out whether you have ISA slots on your motherboard. ISA is the
  1198. name of a bus system, i.e. the way the CPU talks to the other stuff
  1199. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1200. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1201. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1202. # Select ISA DMA controller support
  1203. config ISA_DMA
  1204. bool
  1205. select ISA_DMA_API
  1206. # Select ISA DMA interface
  1207. config ISA_DMA_API
  1208. bool
  1209. config PCI
  1210. bool "PCI support" if MIGHT_HAVE_PCI
  1211. help
  1212. Find out whether you have a PCI motherboard. PCI is the name of a
  1213. bus system, i.e. the way the CPU talks to the other stuff inside
  1214. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1215. VESA. If you have PCI, say Y, otherwise N.
  1216. config PCI_DOMAINS
  1217. bool
  1218. depends on PCI
  1219. config PCI_NANOENGINE
  1220. bool "BSE nanoEngine PCI support"
  1221. depends on SA1100_NANOENGINE
  1222. help
  1223. Enable PCI on the BSE nanoEngine board.
  1224. config PCI_SYSCALL
  1225. def_bool PCI
  1226. # Select the host bridge type
  1227. config PCI_HOST_VIA82C505
  1228. bool
  1229. depends on PCI && ARCH_SHARK
  1230. default y
  1231. config PCI_HOST_ITE8152
  1232. bool
  1233. depends on PCI && MACH_ARMCORE
  1234. default y
  1235. select DMABOUNCE
  1236. source "drivers/pci/Kconfig"
  1237. source "drivers/pcmcia/Kconfig"
  1238. endmenu
  1239. menu "Kernel Features"
  1240. source "kernel/time/Kconfig"
  1241. config HAVE_SMP
  1242. bool
  1243. help
  1244. This option should be selected by machines which have an SMP-
  1245. capable CPU.
  1246. The only effect of this option is to make the SMP-related
  1247. options available to the user for configuration.
  1248. config SMP
  1249. bool "Symmetric Multi-Processing"
  1250. depends on CPU_V6K || CPU_V7
  1251. depends on GENERIC_CLOCKEVENTS
  1252. depends on HAVE_SMP
  1253. depends on MMU
  1254. select USE_GENERIC_SMP_HELPERS
  1255. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1256. help
  1257. This enables support for systems with more than one CPU. If you have
  1258. a system with only one CPU, like most personal computers, say N. If
  1259. you have a system with more than one CPU, say Y.
  1260. If you say N here, the kernel will run on single and multiprocessor
  1261. machines, but will use only one CPU of a multiprocessor machine. If
  1262. you say Y here, the kernel will run on many, but not all, single
  1263. processor machines. On a single processor machine, the kernel will
  1264. run faster if you say N here.
  1265. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1266. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1267. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1268. If you don't know what to do here, say N.
  1269. config SMP_ON_UP
  1270. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1271. depends on EXPERIMENTAL
  1272. depends on SMP && !XIP_KERNEL
  1273. default y
  1274. help
  1275. SMP kernels contain instructions which fail on non-SMP processors.
  1276. Enabling this option allows the kernel to modify itself to make
  1277. these instructions safe. Disabling it allows about 1K of space
  1278. savings.
  1279. If you don't know what to do here, say Y.
  1280. config ARM_CPU_TOPOLOGY
  1281. bool "Support cpu topology definition"
  1282. depends on SMP && CPU_V7
  1283. default y
  1284. help
  1285. Support ARM cpu topology definition. The MPIDR register defines
  1286. affinity between processors which is then used to describe the cpu
  1287. topology of an ARM System.
  1288. config SCHED_MC
  1289. bool "Multi-core scheduler support"
  1290. depends on ARM_CPU_TOPOLOGY
  1291. help
  1292. Multi-core scheduler support improves the CPU scheduler's decision
  1293. making when dealing with multi-core CPU chips at a cost of slightly
  1294. increased overhead in some places. If unsure say N here.
  1295. config SCHED_SMT
  1296. bool "SMT scheduler support"
  1297. depends on ARM_CPU_TOPOLOGY
  1298. help
  1299. Improves the CPU scheduler's decision making when dealing with
  1300. MultiThreading at a cost of slightly increased overhead in some
  1301. places. If unsure say N here.
  1302. config HAVE_ARM_SCU
  1303. bool
  1304. help
  1305. This option enables support for the ARM system coherency unit
  1306. config ARM_ARCH_TIMER
  1307. bool "Architected timer support"
  1308. depends on CPU_V7
  1309. help
  1310. This option enables support for the ARM architected timer
  1311. config HAVE_ARM_TWD
  1312. bool
  1313. depends on SMP
  1314. help
  1315. This options enables support for the ARM timer and watchdog unit
  1316. choice
  1317. prompt "Memory split"
  1318. default VMSPLIT_3G
  1319. help
  1320. Select the desired split between kernel and user memory.
  1321. If you are not absolutely sure what you are doing, leave this
  1322. option alone!
  1323. config VMSPLIT_3G
  1324. bool "3G/1G user/kernel split"
  1325. config VMSPLIT_2G
  1326. bool "2G/2G user/kernel split"
  1327. config VMSPLIT_1G
  1328. bool "1G/3G user/kernel split"
  1329. endchoice
  1330. config PAGE_OFFSET
  1331. hex
  1332. default 0x40000000 if VMSPLIT_1G
  1333. default 0x80000000 if VMSPLIT_2G
  1334. default 0xC0000000
  1335. config NR_CPUS
  1336. int "Maximum number of CPUs (2-32)"
  1337. range 2 32
  1338. depends on SMP
  1339. default "4"
  1340. config HOTPLUG_CPU
  1341. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1342. depends on SMP && HOTPLUG && EXPERIMENTAL
  1343. help
  1344. Say Y here to experiment with turning CPUs off and on. CPUs
  1345. can be controlled through /sys/devices/system/cpu.
  1346. config LOCAL_TIMERS
  1347. bool "Use local timer interrupts"
  1348. depends on SMP
  1349. default y
  1350. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1351. help
  1352. Enable support for local timers on SMP platforms, rather then the
  1353. legacy IPI broadcast method. Local timers allows the system
  1354. accounting to be spread across the timer interval, preventing a
  1355. "thundering herd" at every timer tick.
  1356. config ARCH_NR_GPIO
  1357. int
  1358. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1359. default 355 if ARCH_U8500
  1360. default 264 if MACH_H4700
  1361. default 0
  1362. help
  1363. Maximum number of GPIOs in the system.
  1364. If unsure, leave the default value.
  1365. source kernel/Kconfig.preempt
  1366. config HZ
  1367. int
  1368. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1369. ARCH_S5PV210 || ARCH_EXYNOS4
  1370. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1371. default AT91_TIMER_HZ if ARCH_AT91
  1372. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1373. default 100
  1374. config THUMB2_KERNEL
  1375. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1376. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1377. select AEABI
  1378. select ARM_ASM_UNIFIED
  1379. select ARM_UNWIND
  1380. help
  1381. By enabling this option, the kernel will be compiled in
  1382. Thumb-2 mode. A compiler/assembler that understand the unified
  1383. ARM-Thumb syntax is needed.
  1384. If unsure, say N.
  1385. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1386. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1387. depends on THUMB2_KERNEL && MODULES
  1388. default y
  1389. help
  1390. Various binutils versions can resolve Thumb-2 branches to
  1391. locally-defined, preemptible global symbols as short-range "b.n"
  1392. branch instructions.
  1393. This is a problem, because there's no guarantee the final
  1394. destination of the symbol, or any candidate locations for a
  1395. trampoline, are within range of the branch. For this reason, the
  1396. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1397. relocation in modules at all, and it makes little sense to add
  1398. support.
  1399. The symptom is that the kernel fails with an "unsupported
  1400. relocation" error when loading some modules.
  1401. Until fixed tools are available, passing
  1402. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1403. code which hits this problem, at the cost of a bit of extra runtime
  1404. stack usage in some cases.
  1405. The problem is described in more detail at:
  1406. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1407. Only Thumb-2 kernels are affected.
  1408. Unless you are sure your tools don't have this problem, say Y.
  1409. config ARM_ASM_UNIFIED
  1410. bool
  1411. config AEABI
  1412. bool "Use the ARM EABI to compile the kernel"
  1413. help
  1414. This option allows for the kernel to be compiled using the latest
  1415. ARM ABI (aka EABI). This is only useful if you are using a user
  1416. space environment that is also compiled with EABI.
  1417. Since there are major incompatibilities between the legacy ABI and
  1418. EABI, especially with regard to structure member alignment, this
  1419. option also changes the kernel syscall calling convention to
  1420. disambiguate both ABIs and allow for backward compatibility support
  1421. (selected with CONFIG_OABI_COMPAT).
  1422. To use this you need GCC version 4.0.0 or later.
  1423. config OABI_COMPAT
  1424. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1425. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1426. default y
  1427. help
  1428. This option preserves the old syscall interface along with the
  1429. new (ARM EABI) one. It also provides a compatibility layer to
  1430. intercept syscalls that have structure arguments which layout
  1431. in memory differs between the legacy ABI and the new ARM EABI
  1432. (only for non "thumb" binaries). This option adds a tiny
  1433. overhead to all syscalls and produces a slightly larger kernel.
  1434. If you know you'll be using only pure EABI user space then you
  1435. can say N here. If this option is not selected and you attempt
  1436. to execute a legacy ABI binary then the result will be
  1437. UNPREDICTABLE (in fact it can be predicted that it won't work
  1438. at all). If in doubt say Y.
  1439. config ARCH_HAS_HOLES_MEMORYMODEL
  1440. bool
  1441. config ARCH_SPARSEMEM_ENABLE
  1442. bool
  1443. config ARCH_SPARSEMEM_DEFAULT
  1444. def_bool ARCH_SPARSEMEM_ENABLE
  1445. config ARCH_SELECT_MEMORY_MODEL
  1446. def_bool ARCH_SPARSEMEM_ENABLE
  1447. config HAVE_ARCH_PFN_VALID
  1448. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1449. config HIGHMEM
  1450. bool "High Memory Support"
  1451. depends on MMU
  1452. help
  1453. The address space of ARM processors is only 4 Gigabytes large
  1454. and it has to accommodate user address space, kernel address
  1455. space as well as some memory mapped IO. That means that, if you
  1456. have a large amount of physical memory and/or IO, not all of the
  1457. memory can be "permanently mapped" by the kernel. The physical
  1458. memory that is not permanently mapped is called "high memory".
  1459. Depending on the selected kernel/user memory split, minimum
  1460. vmalloc space and actual amount of RAM, you may not need this
  1461. option which should result in a slightly faster kernel.
  1462. If unsure, say n.
  1463. config HIGHPTE
  1464. bool "Allocate 2nd-level pagetables from highmem"
  1465. depends on HIGHMEM
  1466. config HW_PERF_EVENTS
  1467. bool "Enable hardware performance counter support for perf events"
  1468. depends on PERF_EVENTS && CPU_HAS_PMU
  1469. default y
  1470. help
  1471. Enable hardware performance counter support for perf events. If
  1472. disabled, perf events will use software events only.
  1473. source "mm/Kconfig"
  1474. config FORCE_MAX_ZONEORDER
  1475. int "Maximum zone order" if ARCH_SHMOBILE
  1476. range 11 64 if ARCH_SHMOBILE
  1477. default "9" if SA1111
  1478. default "11"
  1479. help
  1480. The kernel memory allocator divides physically contiguous memory
  1481. blocks into "zones", where each zone is a power of two number of
  1482. pages. This option selects the largest power of two that the kernel
  1483. keeps in the memory allocator. If you need to allocate very large
  1484. blocks of physically contiguous memory, then you may need to
  1485. increase this value.
  1486. This config option is actually maximum order plus one. For example,
  1487. a value of 11 means that the largest free memory block is 2^10 pages.
  1488. config LEDS
  1489. bool "Timer and CPU usage LEDs"
  1490. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1491. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1492. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1493. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1494. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1495. ARCH_AT91 || ARCH_DAVINCI || \
  1496. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1497. help
  1498. If you say Y here, the LEDs on your machine will be used
  1499. to provide useful information about your current system status.
  1500. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1501. be able to select which LEDs are active using the options below. If
  1502. you are compiling a kernel for the EBSA-110 or the LART however, the
  1503. red LED will simply flash regularly to indicate that the system is
  1504. still functional. It is safe to say Y here if you have a CATS
  1505. system, but the driver will do nothing.
  1506. config LEDS_TIMER
  1507. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1508. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1509. || MACH_OMAP_PERSEUS2
  1510. depends on LEDS
  1511. depends on !GENERIC_CLOCKEVENTS
  1512. default y if ARCH_EBSA110
  1513. help
  1514. If you say Y here, one of the system LEDs (the green one on the
  1515. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1516. will flash regularly to indicate that the system is still
  1517. operational. This is mainly useful to kernel hackers who are
  1518. debugging unstable kernels.
  1519. The LART uses the same LED for both Timer LED and CPU usage LED
  1520. functions. You may choose to use both, but the Timer LED function
  1521. will overrule the CPU usage LED.
  1522. config LEDS_CPU
  1523. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1524. !ARCH_OMAP) \
  1525. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1526. || MACH_OMAP_PERSEUS2
  1527. depends on LEDS
  1528. help
  1529. If you say Y here, the red LED will be used to give a good real
  1530. time indication of CPU usage, by lighting whenever the idle task
  1531. is not currently executing.
  1532. The LART uses the same LED for both Timer LED and CPU usage LED
  1533. functions. You may choose to use both, but the Timer LED function
  1534. will overrule the CPU usage LED.
  1535. config ALIGNMENT_TRAP
  1536. bool
  1537. depends on CPU_CP15_MMU
  1538. default y if !ARCH_EBSA110
  1539. select HAVE_PROC_CPU if PROC_FS
  1540. help
  1541. ARM processors cannot fetch/store information which is not
  1542. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1543. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1544. fetch/store instructions will be emulated in software if you say
  1545. here, which has a severe performance impact. This is necessary for
  1546. correct operation of some network protocols. With an IP-only
  1547. configuration it is safe to say N, otherwise say Y.
  1548. config UACCESS_WITH_MEMCPY
  1549. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1550. depends on MMU && EXPERIMENTAL
  1551. default y if CPU_FEROCEON
  1552. help
  1553. Implement faster copy_to_user and clear_user methods for CPU
  1554. cores where a 8-word STM instruction give significantly higher
  1555. memory write throughput than a sequence of individual 32bit stores.
  1556. A possible side effect is a slight increase in scheduling latency
  1557. between threads sharing the same address space if they invoke
  1558. such copy operations with large buffers.
  1559. However, if the CPU data cache is using a write-allocate mode,
  1560. this option is unlikely to provide any performance gain.
  1561. config SECCOMP
  1562. bool
  1563. prompt "Enable seccomp to safely compute untrusted bytecode"
  1564. ---help---
  1565. This kernel feature is useful for number crunching applications
  1566. that may need to compute untrusted bytecode during their
  1567. execution. By using pipes or other transports made available to
  1568. the process as file descriptors supporting the read/write
  1569. syscalls, it's possible to isolate those applications in
  1570. their own address space using seccomp. Once seccomp is
  1571. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1572. and the task is only allowed to execute a few safe syscalls
  1573. defined by each seccomp mode.
  1574. config CC_STACKPROTECTOR
  1575. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1576. depends on EXPERIMENTAL
  1577. help
  1578. This option turns on the -fstack-protector GCC feature. This
  1579. feature puts, at the beginning of functions, a canary value on
  1580. the stack just before the return address, and validates
  1581. the value just before actually returning. Stack based buffer
  1582. overflows (that need to overwrite this return address) now also
  1583. overwrite the canary, which gets detected and the attack is then
  1584. neutralized via a kernel panic.
  1585. This feature requires gcc version 4.2 or above.
  1586. config DEPRECATED_PARAM_STRUCT
  1587. bool "Provide old way to pass kernel parameters"
  1588. help
  1589. This was deprecated in 2001 and announced to live on for 5 years.
  1590. Some old boot loaders still use this way.
  1591. endmenu
  1592. menu "Boot options"
  1593. config USE_OF
  1594. bool "Flattened Device Tree support"
  1595. select OF
  1596. select OF_EARLY_FLATTREE
  1597. select IRQ_DOMAIN
  1598. help
  1599. Include support for flattened device tree machine descriptions.
  1600. # Compressed boot loader in ROM. Yes, we really want to ask about
  1601. # TEXT and BSS so we preserve their values in the config files.
  1602. config ZBOOT_ROM_TEXT
  1603. hex "Compressed ROM boot loader base address"
  1604. default "0"
  1605. help
  1606. The physical address at which the ROM-able zImage is to be
  1607. placed in the target. Platforms which normally make use of
  1608. ROM-able zImage formats normally set this to a suitable
  1609. value in their defconfig file.
  1610. If ZBOOT_ROM is not enabled, this has no effect.
  1611. config ZBOOT_ROM_BSS
  1612. hex "Compressed ROM boot loader BSS address"
  1613. default "0"
  1614. help
  1615. The base address of an area of read/write memory in the target
  1616. for the ROM-able zImage which must be available while the
  1617. decompressor is running. It must be large enough to hold the
  1618. entire decompressed kernel plus an additional 128 KiB.
  1619. Platforms which normally make use of ROM-able zImage formats
  1620. normally set this to a suitable value in their defconfig file.
  1621. If ZBOOT_ROM is not enabled, this has no effect.
  1622. config ZBOOT_ROM
  1623. bool "Compressed boot loader in ROM/flash"
  1624. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1625. help
  1626. Say Y here if you intend to execute your compressed kernel image
  1627. (zImage) directly from ROM or flash. If unsure, say N.
  1628. choice
  1629. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1630. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1631. default ZBOOT_ROM_NONE
  1632. help
  1633. Include experimental SD/MMC loading code in the ROM-able zImage.
  1634. With this enabled it is possible to write the the ROM-able zImage
  1635. kernel image to an MMC or SD card and boot the kernel straight
  1636. from the reset vector. At reset the processor Mask ROM will load
  1637. the first part of the the ROM-able zImage which in turn loads the
  1638. rest the kernel image to RAM.
  1639. config ZBOOT_ROM_NONE
  1640. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1641. help
  1642. Do not load image from SD or MMC
  1643. config ZBOOT_ROM_MMCIF
  1644. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1645. help
  1646. Load image from MMCIF hardware block.
  1647. config ZBOOT_ROM_SH_MOBILE_SDHI
  1648. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1649. help
  1650. Load image from SDHI hardware block
  1651. endchoice
  1652. config ARM_APPENDED_DTB
  1653. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1654. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1655. help
  1656. With this option, the boot code will look for a device tree binary
  1657. (DTB) appended to zImage
  1658. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1659. This is meant as a backward compatibility convenience for those
  1660. systems with a bootloader that can't be upgraded to accommodate
  1661. the documented boot protocol using a device tree.
  1662. Beware that there is very little in terms of protection against
  1663. this option being confused by leftover garbage in memory that might
  1664. look like a DTB header after a reboot if no actual DTB is appended
  1665. to zImage. Do not leave this option active in a production kernel
  1666. if you don't intend to always append a DTB. Proper passing of the
  1667. location into r2 of a bootloader provided DTB is always preferable
  1668. to this option.
  1669. config ARM_ATAG_DTB_COMPAT
  1670. bool "Supplement the appended DTB with traditional ATAG information"
  1671. depends on ARM_APPENDED_DTB
  1672. help
  1673. Some old bootloaders can't be updated to a DTB capable one, yet
  1674. they provide ATAGs with memory configuration, the ramdisk address,
  1675. the kernel cmdline string, etc. Such information is dynamically
  1676. provided by the bootloader and can't always be stored in a static
  1677. DTB. To allow a device tree enabled kernel to be used with such
  1678. bootloaders, this option allows zImage to extract the information
  1679. from the ATAG list and store it at run time into the appended DTB.
  1680. config CMDLINE
  1681. string "Default kernel command string"
  1682. default ""
  1683. help
  1684. On some architectures (EBSA110 and CATS), there is currently no way
  1685. for the boot loader to pass arguments to the kernel. For these
  1686. architectures, you should supply some command-line options at build
  1687. time by entering them here. As a minimum, you should specify the
  1688. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1689. choice
  1690. prompt "Kernel command line type" if CMDLINE != ""
  1691. default CMDLINE_FROM_BOOTLOADER
  1692. config CMDLINE_FROM_BOOTLOADER
  1693. bool "Use bootloader kernel arguments if available"
  1694. help
  1695. Uses the command-line options passed by the boot loader. If
  1696. the boot loader doesn't provide any, the default kernel command
  1697. string provided in CMDLINE will be used.
  1698. config CMDLINE_EXTEND
  1699. bool "Extend bootloader kernel arguments"
  1700. help
  1701. The command-line arguments provided by the boot loader will be
  1702. appended to the default kernel command string.
  1703. config CMDLINE_FORCE
  1704. bool "Always use the default kernel command string"
  1705. help
  1706. Always use the default kernel command string, even if the boot
  1707. loader passes other arguments to the kernel.
  1708. This is useful if you cannot or don't want to change the
  1709. command-line options your boot loader passes to the kernel.
  1710. endchoice
  1711. config XIP_KERNEL
  1712. bool "Kernel Execute-In-Place from ROM"
  1713. depends on !ZBOOT_ROM && !ARM_LPAE
  1714. help
  1715. Execute-In-Place allows the kernel to run from non-volatile storage
  1716. directly addressable by the CPU, such as NOR flash. This saves RAM
  1717. space since the text section of the kernel is not loaded from flash
  1718. to RAM. Read-write sections, such as the data section and stack,
  1719. are still copied to RAM. The XIP kernel is not compressed since
  1720. it has to run directly from flash, so it will take more space to
  1721. store it. The flash address used to link the kernel object files,
  1722. and for storing it, is configuration dependent. Therefore, if you
  1723. say Y here, you must know the proper physical address where to
  1724. store the kernel image depending on your own flash memory usage.
  1725. Also note that the make target becomes "make xipImage" rather than
  1726. "make zImage" or "make Image". The final kernel binary to put in
  1727. ROM memory will be arch/arm/boot/xipImage.
  1728. If unsure, say N.
  1729. config XIP_PHYS_ADDR
  1730. hex "XIP Kernel Physical Location"
  1731. depends on XIP_KERNEL
  1732. default "0x00080000"
  1733. help
  1734. This is the physical address in your flash memory the kernel will
  1735. be linked for and stored to. This address is dependent on your
  1736. own flash usage.
  1737. config KEXEC
  1738. bool "Kexec system call (EXPERIMENTAL)"
  1739. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1740. help
  1741. kexec is a system call that implements the ability to shutdown your
  1742. current kernel, and to start another kernel. It is like a reboot
  1743. but it is independent of the system firmware. And like a reboot
  1744. you can start any kernel with it, not just Linux.
  1745. It is an ongoing process to be certain the hardware in a machine
  1746. is properly shutdown, so do not be surprised if this code does not
  1747. initially work for you. It may help to enable device hotplugging
  1748. support.
  1749. config ATAGS_PROC
  1750. bool "Export atags in procfs"
  1751. depends on KEXEC
  1752. default y
  1753. help
  1754. Should the atags used to boot the kernel be exported in an "atags"
  1755. file in procfs. Useful with kexec.
  1756. config CRASH_DUMP
  1757. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1758. depends on EXPERIMENTAL
  1759. help
  1760. Generate crash dump after being started by kexec. This should
  1761. be normally only set in special crash dump kernels which are
  1762. loaded in the main kernel with kexec-tools into a specially
  1763. reserved region and then later executed after a crash by
  1764. kdump/kexec. The crash dump kernel must be compiled to a
  1765. memory address not used by the main kernel
  1766. For more details see Documentation/kdump/kdump.txt
  1767. config AUTO_ZRELADDR
  1768. bool "Auto calculation of the decompressed kernel image address"
  1769. depends on !ZBOOT_ROM && !ARCH_U300
  1770. help
  1771. ZRELADDR is the physical address where the decompressed kernel
  1772. image will be placed. If AUTO_ZRELADDR is selected, the address
  1773. will be determined at run-time by masking the current IP with
  1774. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1775. from start of memory.
  1776. endmenu
  1777. menu "CPU Power Management"
  1778. if ARCH_HAS_CPUFREQ
  1779. source "drivers/cpufreq/Kconfig"
  1780. config CPU_FREQ_IMX
  1781. tristate "CPUfreq driver for i.MX CPUs"
  1782. depends on ARCH_MXC && CPU_FREQ
  1783. help
  1784. This enables the CPUfreq driver for i.MX CPUs.
  1785. config CPU_FREQ_SA1100
  1786. bool
  1787. config CPU_FREQ_SA1110
  1788. bool
  1789. config CPU_FREQ_INTEGRATOR
  1790. tristate "CPUfreq driver for ARM Integrator CPUs"
  1791. depends on ARCH_INTEGRATOR && CPU_FREQ
  1792. default y
  1793. help
  1794. This enables the CPUfreq driver for ARM Integrator CPUs.
  1795. For details, take a look at <file:Documentation/cpu-freq>.
  1796. If in doubt, say Y.
  1797. config CPU_FREQ_PXA
  1798. bool
  1799. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1800. default y
  1801. select CPU_FREQ_TABLE
  1802. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1803. config CPU_FREQ_S3C
  1804. bool
  1805. help
  1806. Internal configuration node for common cpufreq on Samsung SoC
  1807. config CPU_FREQ_S3C24XX
  1808. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1809. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1810. select CPU_FREQ_S3C
  1811. help
  1812. This enables the CPUfreq driver for the Samsung S3C24XX family
  1813. of CPUs.
  1814. For details, take a look at <file:Documentation/cpu-freq>.
  1815. If in doubt, say N.
  1816. config CPU_FREQ_S3C24XX_PLL
  1817. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1818. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1819. help
  1820. Compile in support for changing the PLL frequency from the
  1821. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1822. after a frequency change, so by default it is not enabled.
  1823. This also means that the PLL tables for the selected CPU(s) will
  1824. be built which may increase the size of the kernel image.
  1825. config CPU_FREQ_S3C24XX_DEBUG
  1826. bool "Debug CPUfreq Samsung driver core"
  1827. depends on CPU_FREQ_S3C24XX
  1828. help
  1829. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1830. config CPU_FREQ_S3C24XX_IODEBUG
  1831. bool "Debug CPUfreq Samsung driver IO timing"
  1832. depends on CPU_FREQ_S3C24XX
  1833. help
  1834. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1835. config CPU_FREQ_S3C24XX_DEBUGFS
  1836. bool "Export debugfs for CPUFreq"
  1837. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1838. help
  1839. Export status information via debugfs.
  1840. endif
  1841. source "drivers/cpuidle/Kconfig"
  1842. endmenu
  1843. menu "Floating point emulation"
  1844. comment "At least one emulation must be selected"
  1845. config FPE_NWFPE
  1846. bool "NWFPE math emulation"
  1847. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1848. ---help---
  1849. Say Y to include the NWFPE floating point emulator in the kernel.
  1850. This is necessary to run most binaries. Linux does not currently
  1851. support floating point hardware so you need to say Y here even if
  1852. your machine has an FPA or floating point co-processor podule.
  1853. You may say N here if you are going to load the Acorn FPEmulator
  1854. early in the bootup.
  1855. config FPE_NWFPE_XP
  1856. bool "Support extended precision"
  1857. depends on FPE_NWFPE
  1858. help
  1859. Say Y to include 80-bit support in the kernel floating-point
  1860. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1861. Note that gcc does not generate 80-bit operations by default,
  1862. so in most cases this option only enlarges the size of the
  1863. floating point emulator without any good reason.
  1864. You almost surely want to say N here.
  1865. config FPE_FASTFPE
  1866. bool "FastFPE math emulation (EXPERIMENTAL)"
  1867. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1868. ---help---
  1869. Say Y here to include the FAST floating point emulator in the kernel.
  1870. This is an experimental much faster emulator which now also has full
  1871. precision for the mantissa. It does not support any exceptions.
  1872. It is very simple, and approximately 3-6 times faster than NWFPE.
  1873. It should be sufficient for most programs. It may be not suitable
  1874. for scientific calculations, but you have to check this for yourself.
  1875. If you do not feel you need a faster FP emulation you should better
  1876. choose NWFPE.
  1877. config VFP
  1878. bool "VFP-format floating point maths"
  1879. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1880. help
  1881. Say Y to include VFP support code in the kernel. This is needed
  1882. if your hardware includes a VFP unit.
  1883. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1884. release notes and additional status information.
  1885. Say N if your target does not have VFP hardware.
  1886. config VFPv3
  1887. bool
  1888. depends on VFP
  1889. default y if CPU_V7
  1890. config NEON
  1891. bool "Advanced SIMD (NEON) Extension support"
  1892. depends on VFPv3 && CPU_V7
  1893. help
  1894. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1895. Extension.
  1896. endmenu
  1897. menu "Userspace binary formats"
  1898. source "fs/Kconfig.binfmt"
  1899. config ARTHUR
  1900. tristate "RISC OS personality"
  1901. depends on !AEABI
  1902. help
  1903. Say Y here to include the kernel code necessary if you want to run
  1904. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1905. experimental; if this sounds frightening, say N and sleep in peace.
  1906. You can also say M here to compile this support as a module (which
  1907. will be called arthur).
  1908. endmenu
  1909. menu "Power management options"
  1910. source "kernel/power/Kconfig"
  1911. config ARCH_SUSPEND_POSSIBLE
  1912. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1913. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1914. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1915. def_bool y
  1916. config ARM_CPU_SUSPEND
  1917. def_bool PM_SLEEP
  1918. endmenu
  1919. source "net/Kconfig"
  1920. source "drivers/Kconfig"
  1921. source "fs/Kconfig"
  1922. source "arch/arm/Kconfig.debug"
  1923. source "security/Kconfig"
  1924. source "crypto/Kconfig"
  1925. source "lib/Kconfig"