Kconfig 64 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE if PCI || ISA || PCMCIA
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_KGDB
  13. select HAVE_KPROBES if !XIP_KERNEL
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_IRQ_WORK
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_GENERIC_HARDIRQS
  30. select HAVE_SPARSE_IRQ
  31. select GENERIC_IRQ_SHOW
  32. select CPU_PM if (SUSPEND || CPU_IDLE)
  33. help
  34. The ARM series is a line of low-power-consumption RISC chip designs
  35. licensed by ARM Ltd and targeted at embedded applications and
  36. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  37. manufactured, but legacy ARM-based PC hardware remains popular in
  38. Europe. There is an ARM Linux project with a web page at
  39. <http://www.arm.linux.org.uk/>.
  40. config ARM_HAS_SG_CHAIN
  41. bool
  42. config HAVE_PWM
  43. bool
  44. config MIGHT_HAVE_PCI
  45. bool
  46. config SYS_SUPPORTS_APM_EMULATION
  47. bool
  48. config HAVE_SCHED_CLOCK
  49. bool
  50. config GENERIC_GPIO
  51. bool
  52. config ARCH_USES_GETTIMEOFFSET
  53. bool
  54. default n
  55. config GENERIC_CLOCKEVENTS
  56. bool
  57. config GENERIC_CLOCKEVENTS_BROADCAST
  58. bool
  59. depends on GENERIC_CLOCKEVENTS
  60. default y if SMP
  61. config KTIME_SCALAR
  62. bool
  63. default y
  64. config HAVE_TCM
  65. bool
  66. select GENERIC_ALLOCATOR
  67. config HAVE_PROC_CPU
  68. bool
  69. config NO_IOPORT
  70. bool
  71. config EISA
  72. bool
  73. ---help---
  74. The Extended Industry Standard Architecture (EISA) bus was
  75. developed as an open alternative to the IBM MicroChannel bus.
  76. The EISA bus provided some of the features of the IBM MicroChannel
  77. bus while maintaining backward compatibility with cards made for
  78. the older ISA bus. The EISA bus saw limited use between 1988 and
  79. 1995 when it was made obsolete by the PCI bus.
  80. Say Y here if you are building a kernel for an EISA-based machine.
  81. Otherwise, say N.
  82. config SBUS
  83. bool
  84. config MCA
  85. bool
  86. help
  87. MicroChannel Architecture is found in some IBM PS/2 machines and
  88. laptops. It is a bus system similar to PCI or ISA. See
  89. <file:Documentation/mca.txt> (and especially the web page given
  90. there) before attempting to build an MCA bus kernel.
  91. config STACKTRACE_SUPPORT
  92. bool
  93. default y
  94. config HAVE_LATENCYTOP_SUPPORT
  95. bool
  96. depends on !SMP
  97. default y
  98. config LOCKDEP_SUPPORT
  99. bool
  100. default y
  101. config TRACE_IRQFLAGS_SUPPORT
  102. bool
  103. default y
  104. config HARDIRQS_SW_RESEND
  105. bool
  106. default y
  107. config GENERIC_IRQ_PROBE
  108. bool
  109. default y
  110. config GENERIC_LOCKBREAK
  111. bool
  112. default y
  113. depends on SMP && PREEMPT
  114. config RWSEM_GENERIC_SPINLOCK
  115. bool
  116. default y
  117. config RWSEM_XCHGADD_ALGORITHM
  118. bool
  119. config ARCH_HAS_ILOG2_U32
  120. bool
  121. config ARCH_HAS_ILOG2_U64
  122. bool
  123. config ARCH_HAS_CPUFREQ
  124. bool
  125. help
  126. Internal node to signify that the ARCH has CPUFREQ support
  127. and that the relevant menu configurations are displayed for
  128. it.
  129. config ARCH_HAS_CPU_IDLE_WAIT
  130. def_bool y
  131. config GENERIC_HWEIGHT
  132. bool
  133. default y
  134. config GENERIC_CALIBRATE_DELAY
  135. bool
  136. default y
  137. config ARCH_MAY_HAVE_PC_FDC
  138. bool
  139. config ZONE_DMA
  140. bool
  141. config NEED_DMA_MAP_STATE
  142. def_bool y
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config ARCH_MTD_XIP
  148. bool
  149. config VECTORS_BASE
  150. hex
  151. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  152. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  153. default 0x00000000
  154. help
  155. The base address of exception vectors.
  156. config ARM_PATCH_PHYS_VIRT
  157. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  158. default y
  159. depends on !XIP_KERNEL && MMU
  160. depends on !ARCH_REALVIEW || !SPARSEMEM
  161. help
  162. Patch phys-to-virt and virt-to-phys translation functions at
  163. boot and module load time according to the position of the
  164. kernel in system memory.
  165. This can only be used with non-XIP MMU kernels where the base
  166. of physical memory is at a 16MB boundary.
  167. Only disable this option if you know that you do not require
  168. this feature (eg, building a kernel for a single machine) and
  169. you need to shrink the kernel to the minimal size.
  170. config NEED_MACH_MEMORY_H
  171. bool
  172. help
  173. Select this when mach/memory.h is required to provide special
  174. definitions for this platform. The need for mach/memory.h should
  175. be avoided when possible.
  176. config PHYS_OFFSET
  177. hex "Physical address of main memory"
  178. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  179. help
  180. Please provide the physical address corresponding to the
  181. location of main memory in your system.
  182. config GENERIC_BUG
  183. def_bool y
  184. depends on BUG
  185. source "init/Kconfig"
  186. source "kernel/Kconfig.freezer"
  187. menu "System Type"
  188. config MMU
  189. bool "MMU-based Paged Memory Management Support"
  190. default y
  191. help
  192. Select if you want MMU-based virtualised addressing space
  193. support by paged memory management. If unsure, say 'Y'.
  194. #
  195. # The "ARM system type" choice list is ordered alphabetically by option
  196. # text. Please add new entries in the option alphabetic order.
  197. #
  198. choice
  199. prompt "ARM system type"
  200. default ARCH_VERSATILE
  201. config ARCH_INTEGRATOR
  202. bool "ARM Ltd. Integrator family"
  203. select ARM_AMBA
  204. select ARCH_HAS_CPUFREQ
  205. select CLKDEV_LOOKUP
  206. select HAVE_MACH_CLKDEV
  207. select ICST
  208. select GENERIC_CLOCKEVENTS
  209. select PLAT_VERSATILE
  210. select PLAT_VERSATILE_FPGA_IRQ
  211. select NEED_MACH_MEMORY_H
  212. help
  213. Support for ARM's Integrator platform.
  214. config ARCH_REALVIEW
  215. bool "ARM Ltd. RealView family"
  216. select ARM_AMBA
  217. select CLKDEV_LOOKUP
  218. select HAVE_MACH_CLKDEV
  219. select ICST
  220. select GENERIC_CLOCKEVENTS
  221. select ARCH_WANT_OPTIONAL_GPIOLIB
  222. select PLAT_VERSATILE
  223. select PLAT_VERSATILE_CLCD
  224. select ARM_TIMER_SP804
  225. select GPIO_PL061 if GPIOLIB
  226. select NEED_MACH_MEMORY_H
  227. help
  228. This enables support for ARM Ltd RealView boards.
  229. config ARCH_VERSATILE
  230. bool "ARM Ltd. Versatile family"
  231. select ARM_AMBA
  232. select ARM_VIC
  233. select CLKDEV_LOOKUP
  234. select HAVE_MACH_CLKDEV
  235. select ICST
  236. select GENERIC_CLOCKEVENTS
  237. select ARCH_WANT_OPTIONAL_GPIOLIB
  238. select PLAT_VERSATILE
  239. select PLAT_VERSATILE_CLCD
  240. select PLAT_VERSATILE_FPGA_IRQ
  241. select ARM_TIMER_SP804
  242. help
  243. This enables support for ARM Ltd Versatile board.
  244. config ARCH_VEXPRESS
  245. bool "ARM Ltd. Versatile Express family"
  246. select ARCH_WANT_OPTIONAL_GPIOLIB
  247. select ARM_AMBA
  248. select ARM_TIMER_SP804
  249. select CLKDEV_LOOKUP
  250. select HAVE_MACH_CLKDEV
  251. select GENERIC_CLOCKEVENTS
  252. select HAVE_CLK
  253. select HAVE_PATA_PLATFORM
  254. select ICST
  255. select PLAT_VERSATILE
  256. select PLAT_VERSATILE_CLCD
  257. help
  258. This enables support for the ARM Ltd Versatile Express boards.
  259. config ARCH_AT91
  260. bool "Atmel AT91"
  261. select ARCH_REQUIRE_GPIOLIB
  262. select HAVE_CLK
  263. select CLKDEV_LOOKUP
  264. help
  265. This enables support for systems based on the Atmel AT91RM9200,
  266. AT91SAM9 and AT91CAP9 processors.
  267. config ARCH_BCMRING
  268. bool "Broadcom BCMRING"
  269. depends on MMU
  270. select CPU_V6
  271. select ARM_AMBA
  272. select ARM_TIMER_SP804
  273. select CLKDEV_LOOKUP
  274. select GENERIC_CLOCKEVENTS
  275. select ARCH_WANT_OPTIONAL_GPIOLIB
  276. help
  277. Support for Broadcom's BCMRing platform.
  278. config ARCH_HIGHBANK
  279. bool "Calxeda Highbank-based"
  280. select ARCH_WANT_OPTIONAL_GPIOLIB
  281. select ARM_AMBA
  282. select ARM_GIC
  283. select ARM_TIMER_SP804
  284. select CLKDEV_LOOKUP
  285. select CPU_V7
  286. select GENERIC_CLOCKEVENTS
  287. select HAVE_ARM_SCU
  288. select USE_OF
  289. help
  290. Support for the Calxeda Highbank SoC based boards.
  291. config ARCH_CLPS711X
  292. bool "Cirrus Logic CLPS711x/EP721x-based"
  293. select CPU_ARM720T
  294. select ARCH_USES_GETTIMEOFFSET
  295. select NEED_MACH_MEMORY_H
  296. help
  297. Support for Cirrus Logic 711x/721x based boards.
  298. config ARCH_CNS3XXX
  299. bool "Cavium Networks CNS3XXX family"
  300. select CPU_V6K
  301. select GENERIC_CLOCKEVENTS
  302. select ARM_GIC
  303. select MIGHT_HAVE_PCI
  304. select PCI_DOMAINS if PCI
  305. help
  306. Support for Cavium Networks CNS3XXX platform.
  307. config ARCH_GEMINI
  308. bool "Cortina Systems Gemini"
  309. select CPU_FA526
  310. select ARCH_REQUIRE_GPIOLIB
  311. select ARCH_USES_GETTIMEOFFSET
  312. help
  313. Support for the Cortina Systems Gemini family SoCs
  314. config ARCH_PRIMA2
  315. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  316. select CPU_V7
  317. select NO_IOPORT
  318. select GENERIC_CLOCKEVENTS
  319. select CLKDEV_LOOKUP
  320. select GENERIC_IRQ_CHIP
  321. select USE_OF
  322. select ZONE_DMA
  323. help
  324. Support for CSR SiRFSoC ARM Cortex A9 Platform
  325. config ARCH_EBSA110
  326. bool "EBSA-110"
  327. select CPU_SA110
  328. select ISA
  329. select NO_IOPORT
  330. select ARCH_USES_GETTIMEOFFSET
  331. select NEED_MACH_MEMORY_H
  332. help
  333. This is an evaluation board for the StrongARM processor available
  334. from Digital. It has limited hardware on-board, including an
  335. Ethernet interface, two PCMCIA sockets, two serial ports and a
  336. parallel port.
  337. config ARCH_EP93XX
  338. bool "EP93xx-based"
  339. select CPU_ARM920T
  340. select ARM_AMBA
  341. select ARM_VIC
  342. select CLKDEV_LOOKUP
  343. select ARCH_REQUIRE_GPIOLIB
  344. select ARCH_HAS_HOLES_MEMORYMODEL
  345. select ARCH_USES_GETTIMEOFFSET
  346. select NEED_MACH_MEMORY_H
  347. help
  348. This enables support for the Cirrus EP93xx series of CPUs.
  349. config ARCH_FOOTBRIDGE
  350. bool "FootBridge"
  351. select CPU_SA110
  352. select FOOTBRIDGE
  353. select GENERIC_CLOCKEVENTS
  354. select HAVE_IDE
  355. select NEED_MACH_MEMORY_H
  356. help
  357. Support for systems based on the DC21285 companion chip
  358. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  359. config ARCH_MXC
  360. bool "Freescale MXC/iMX-based"
  361. select GENERIC_CLOCKEVENTS
  362. select ARCH_REQUIRE_GPIOLIB
  363. select CLKDEV_LOOKUP
  364. select CLKSRC_MMIO
  365. select GENERIC_IRQ_CHIP
  366. select HAVE_SCHED_CLOCK
  367. select MULTI_IRQ_HANDLER
  368. help
  369. Support for Freescale MXC/iMX-based family of processors
  370. config ARCH_MXS
  371. bool "Freescale MXS-based"
  372. select GENERIC_CLOCKEVENTS
  373. select ARCH_REQUIRE_GPIOLIB
  374. select CLKDEV_LOOKUP
  375. select CLKSRC_MMIO
  376. help
  377. Support for Freescale MXS-based family of processors
  378. config ARCH_NETX
  379. bool "Hilscher NetX based"
  380. select CLKSRC_MMIO
  381. select CPU_ARM926T
  382. select ARM_VIC
  383. select GENERIC_CLOCKEVENTS
  384. help
  385. This enables support for systems based on the Hilscher NetX Soc
  386. config ARCH_H720X
  387. bool "Hynix HMS720x-based"
  388. select CPU_ARM720T
  389. select ISA_DMA_API
  390. select ARCH_USES_GETTIMEOFFSET
  391. help
  392. This enables support for systems based on the Hynix HMS720x
  393. config ARCH_IOP13XX
  394. bool "IOP13xx-based"
  395. depends on MMU
  396. select CPU_XSC3
  397. select PLAT_IOP
  398. select PCI
  399. select ARCH_SUPPORTS_MSI
  400. select VMSPLIT_1G
  401. select NEED_MACH_MEMORY_H
  402. help
  403. Support for Intel's IOP13XX (XScale) family of processors.
  404. config ARCH_IOP32X
  405. bool "IOP32x-based"
  406. depends on MMU
  407. select CPU_XSCALE
  408. select PLAT_IOP
  409. select PCI
  410. select ARCH_REQUIRE_GPIOLIB
  411. help
  412. Support for Intel's 80219 and IOP32X (XScale) family of
  413. processors.
  414. config ARCH_IOP33X
  415. bool "IOP33x-based"
  416. depends on MMU
  417. select CPU_XSCALE
  418. select PLAT_IOP
  419. select PCI
  420. select ARCH_REQUIRE_GPIOLIB
  421. help
  422. Support for Intel's IOP33X (XScale) family of processors.
  423. config ARCH_IXP23XX
  424. bool "IXP23XX-based"
  425. depends on MMU
  426. select CPU_XSC3
  427. select PCI
  428. select ARCH_USES_GETTIMEOFFSET
  429. select NEED_MACH_MEMORY_H
  430. help
  431. Support for Intel's IXP23xx (XScale) family of processors.
  432. config ARCH_IXP2000
  433. bool "IXP2400/2800-based"
  434. depends on MMU
  435. select CPU_XSCALE
  436. select PCI
  437. select ARCH_USES_GETTIMEOFFSET
  438. select NEED_MACH_MEMORY_H
  439. help
  440. Support for Intel's IXP2400/2800 (XScale) family of processors.
  441. config ARCH_IXP4XX
  442. bool "IXP4xx-based"
  443. depends on MMU
  444. select CLKSRC_MMIO
  445. select CPU_XSCALE
  446. select GENERIC_GPIO
  447. select GENERIC_CLOCKEVENTS
  448. select HAVE_SCHED_CLOCK
  449. select MIGHT_HAVE_PCI
  450. select DMABOUNCE if PCI
  451. help
  452. Support for Intel's IXP4XX (XScale) family of processors.
  453. config ARCH_DOVE
  454. bool "Marvell Dove"
  455. select CPU_V7
  456. select PCI
  457. select ARCH_REQUIRE_GPIOLIB
  458. select GENERIC_CLOCKEVENTS
  459. select PLAT_ORION
  460. help
  461. Support for the Marvell Dove SoC 88AP510
  462. config ARCH_KIRKWOOD
  463. bool "Marvell Kirkwood"
  464. select CPU_FEROCEON
  465. select PCI
  466. select ARCH_REQUIRE_GPIOLIB
  467. select GENERIC_CLOCKEVENTS
  468. select PLAT_ORION
  469. help
  470. Support for the following Marvell Kirkwood series SoCs:
  471. 88F6180, 88F6192 and 88F6281.
  472. config ARCH_LPC32XX
  473. bool "NXP LPC32XX"
  474. select CLKSRC_MMIO
  475. select CPU_ARM926T
  476. select ARCH_REQUIRE_GPIOLIB
  477. select HAVE_IDE
  478. select ARM_AMBA
  479. select USB_ARCH_HAS_OHCI
  480. select CLKDEV_LOOKUP
  481. select GENERIC_CLOCKEVENTS
  482. help
  483. Support for the NXP LPC32XX family of processors
  484. config ARCH_MV78XX0
  485. bool "Marvell MV78xx0"
  486. select CPU_FEROCEON
  487. select PCI
  488. select ARCH_REQUIRE_GPIOLIB
  489. select GENERIC_CLOCKEVENTS
  490. select PLAT_ORION
  491. help
  492. Support for the following Marvell MV78xx0 series SoCs:
  493. MV781x0, MV782x0.
  494. config ARCH_ORION5X
  495. bool "Marvell Orion"
  496. depends on MMU
  497. select CPU_FEROCEON
  498. select PCI
  499. select ARCH_REQUIRE_GPIOLIB
  500. select GENERIC_CLOCKEVENTS
  501. select PLAT_ORION
  502. help
  503. Support for the following Marvell Orion 5x series SoCs:
  504. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  505. Orion-2 (5281), Orion-1-90 (6183).
  506. config ARCH_MMP
  507. bool "Marvell PXA168/910/MMP2"
  508. depends on MMU
  509. select ARCH_REQUIRE_GPIOLIB
  510. select CLKDEV_LOOKUP
  511. select GENERIC_CLOCKEVENTS
  512. select GPIO_PXA
  513. select HAVE_SCHED_CLOCK
  514. select TICK_ONESHOT
  515. select PLAT_PXA
  516. select SPARSE_IRQ
  517. select GENERIC_ALLOCATOR
  518. help
  519. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  520. config ARCH_KS8695
  521. bool "Micrel/Kendin KS8695"
  522. select CPU_ARM922T
  523. select ARCH_REQUIRE_GPIOLIB
  524. select ARCH_USES_GETTIMEOFFSET
  525. select NEED_MACH_MEMORY_H
  526. help
  527. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  528. System-on-Chip devices.
  529. config ARCH_W90X900
  530. bool "Nuvoton W90X900 CPU"
  531. select CPU_ARM926T
  532. select ARCH_REQUIRE_GPIOLIB
  533. select CLKDEV_LOOKUP
  534. select CLKSRC_MMIO
  535. select GENERIC_CLOCKEVENTS
  536. help
  537. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  538. At present, the w90x900 has been renamed nuc900, regarding
  539. the ARM series product line, you can login the following
  540. link address to know more.
  541. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  542. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  543. config ARCH_TEGRA
  544. bool "NVIDIA Tegra"
  545. select CLKDEV_LOOKUP
  546. select CLKSRC_MMIO
  547. select GENERIC_CLOCKEVENTS
  548. select GENERIC_GPIO
  549. select HAVE_CLK
  550. select HAVE_SCHED_CLOCK
  551. select ARCH_HAS_CPUFREQ
  552. help
  553. This enables support for NVIDIA Tegra based systems (Tegra APX,
  554. Tegra 6xx and Tegra 2 series).
  555. config ARCH_PICOXCELL
  556. bool "Picochip picoXcell"
  557. select ARCH_REQUIRE_GPIOLIB
  558. select ARM_PATCH_PHYS_VIRT
  559. select ARM_VIC
  560. select CPU_V6K
  561. select DW_APB_TIMER
  562. select GENERIC_CLOCKEVENTS
  563. select GENERIC_GPIO
  564. select HAVE_SCHED_CLOCK
  565. select HAVE_TCM
  566. select NO_IOPORT
  567. select USE_OF
  568. help
  569. This enables support for systems based on the Picochip picoXcell
  570. family of Femtocell devices. The picoxcell support requires device tree
  571. for all boards.
  572. config ARCH_PNX4008
  573. bool "Philips Nexperia PNX4008 Mobile"
  574. select CPU_ARM926T
  575. select CLKDEV_LOOKUP
  576. select ARCH_USES_GETTIMEOFFSET
  577. help
  578. This enables support for Philips PNX4008 mobile platform.
  579. config ARCH_PXA
  580. bool "PXA2xx/PXA3xx-based"
  581. depends on MMU
  582. select ARCH_MTD_XIP
  583. select ARCH_HAS_CPUFREQ
  584. select CLKDEV_LOOKUP
  585. select CLKSRC_MMIO
  586. select ARCH_REQUIRE_GPIOLIB
  587. select GENERIC_CLOCKEVENTS
  588. select GPIO_PXA
  589. select HAVE_SCHED_CLOCK
  590. select TICK_ONESHOT
  591. select PLAT_PXA
  592. select SPARSE_IRQ
  593. select AUTO_ZRELADDR
  594. select MULTI_IRQ_HANDLER
  595. select ARM_CPU_SUSPEND if PM
  596. select HAVE_IDE
  597. help
  598. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  599. config ARCH_MSM
  600. bool "Qualcomm MSM"
  601. select HAVE_CLK
  602. select GENERIC_CLOCKEVENTS
  603. select ARCH_REQUIRE_GPIOLIB
  604. select CLKDEV_LOOKUP
  605. help
  606. Support for Qualcomm MSM/QSD based systems. This runs on the
  607. apps processor of the MSM/QSD and depends on a shared memory
  608. interface to the modem processor which runs the baseband
  609. stack and controls some vital subsystems
  610. (clock and power control, etc).
  611. config ARCH_SHMOBILE
  612. bool "Renesas SH-Mobile / R-Mobile"
  613. select HAVE_CLK
  614. select CLKDEV_LOOKUP
  615. select HAVE_MACH_CLKDEV
  616. select GENERIC_CLOCKEVENTS
  617. select NO_IOPORT
  618. select SPARSE_IRQ
  619. select MULTI_IRQ_HANDLER
  620. select PM_GENERIC_DOMAINS if PM
  621. select NEED_MACH_MEMORY_H
  622. help
  623. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  624. config ARCH_RPC
  625. bool "RiscPC"
  626. select ARCH_ACORN
  627. select FIQ
  628. select TIMER_ACORN
  629. select ARCH_MAY_HAVE_PC_FDC
  630. select HAVE_PATA_PLATFORM
  631. select ISA_DMA_API
  632. select NO_IOPORT
  633. select ARCH_SPARSEMEM_ENABLE
  634. select ARCH_USES_GETTIMEOFFSET
  635. select HAVE_IDE
  636. select NEED_MACH_MEMORY_H
  637. help
  638. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  639. CD-ROM interface, serial and parallel port, and the floppy drive.
  640. config ARCH_SA1100
  641. bool "SA1100-based"
  642. select CLKSRC_MMIO
  643. select CPU_SA1100
  644. select ISA
  645. select ARCH_SPARSEMEM_ENABLE
  646. select ARCH_MTD_XIP
  647. select ARCH_HAS_CPUFREQ
  648. select CPU_FREQ
  649. select GENERIC_CLOCKEVENTS
  650. select HAVE_CLK
  651. select HAVE_SCHED_CLOCK
  652. select TICK_ONESHOT
  653. select ARCH_REQUIRE_GPIOLIB
  654. select HAVE_IDE
  655. select NEED_MACH_MEMORY_H
  656. help
  657. Support for StrongARM 11x0 based boards.
  658. config ARCH_S3C2410
  659. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  660. select GENERIC_GPIO
  661. select ARCH_HAS_CPUFREQ
  662. select HAVE_CLK
  663. select CLKDEV_LOOKUP
  664. select ARCH_USES_GETTIMEOFFSET
  665. select HAVE_S3C2410_I2C if I2C
  666. help
  667. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  668. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  669. the Samsung SMDK2410 development board (and derivatives).
  670. Note, the S3C2416 and the S3C2450 are so close that they even share
  671. the same SoC ID code. This means that there is no separate machine
  672. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  673. config ARCH_S3C64XX
  674. bool "Samsung S3C64XX"
  675. select PLAT_SAMSUNG
  676. select CPU_V6
  677. select ARM_VIC
  678. select HAVE_CLK
  679. select HAVE_TCM
  680. select CLKDEV_LOOKUP
  681. select NO_IOPORT
  682. select ARCH_USES_GETTIMEOFFSET
  683. select ARCH_HAS_CPUFREQ
  684. select ARCH_REQUIRE_GPIOLIB
  685. select SAMSUNG_CLKSRC
  686. select SAMSUNG_IRQ_VIC_TIMER
  687. select S3C_GPIO_TRACK
  688. select S3C_DEV_NAND
  689. select USB_ARCH_HAS_OHCI
  690. select SAMSUNG_GPIOLIB_4BIT
  691. select HAVE_S3C2410_I2C if I2C
  692. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  693. help
  694. Samsung S3C64XX series based systems
  695. config ARCH_S5P64X0
  696. bool "Samsung S5P6440 S5P6450"
  697. select CPU_V6
  698. select GENERIC_GPIO
  699. select HAVE_CLK
  700. select CLKDEV_LOOKUP
  701. select CLKSRC_MMIO
  702. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  703. select GENERIC_CLOCKEVENTS
  704. select HAVE_SCHED_CLOCK
  705. select HAVE_S3C2410_I2C if I2C
  706. select HAVE_S3C_RTC if RTC_CLASS
  707. help
  708. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  709. SMDK6450.
  710. config ARCH_S5PC100
  711. bool "Samsung S5PC100"
  712. select GENERIC_GPIO
  713. select HAVE_CLK
  714. select CLKDEV_LOOKUP
  715. select CPU_V7
  716. select ARM_L1_CACHE_SHIFT_6
  717. select ARCH_USES_GETTIMEOFFSET
  718. select HAVE_S3C2410_I2C if I2C
  719. select HAVE_S3C_RTC if RTC_CLASS
  720. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  721. help
  722. Samsung S5PC100 series based systems
  723. config ARCH_S5PV210
  724. bool "Samsung S5PV210/S5PC110"
  725. select CPU_V7
  726. select ARCH_SPARSEMEM_ENABLE
  727. select ARCH_HAS_HOLES_MEMORYMODEL
  728. select GENERIC_GPIO
  729. select HAVE_CLK
  730. select CLKDEV_LOOKUP
  731. select CLKSRC_MMIO
  732. select ARM_L1_CACHE_SHIFT_6
  733. select ARCH_HAS_CPUFREQ
  734. select GENERIC_CLOCKEVENTS
  735. select HAVE_SCHED_CLOCK
  736. select HAVE_S3C2410_I2C if I2C
  737. select HAVE_S3C_RTC if RTC_CLASS
  738. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  739. select NEED_MACH_MEMORY_H
  740. help
  741. Samsung S5PV210/S5PC110 series based systems
  742. config ARCH_EXYNOS
  743. bool "SAMSUNG EXYNOS"
  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 ARCH_HAS_CPUFREQ
  751. select GENERIC_CLOCKEVENTS
  752. select HAVE_S3C_RTC if RTC_CLASS
  753. select HAVE_S3C2410_I2C if I2C
  754. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  755. select NEED_MACH_MEMORY_H
  756. help
  757. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  758. config ARCH_SHARK
  759. bool "Shark"
  760. select CPU_SA110
  761. select ISA
  762. select ISA_DMA
  763. select ZONE_DMA
  764. select PCI
  765. select ARCH_USES_GETTIMEOFFSET
  766. select NEED_MACH_MEMORY_H
  767. help
  768. Support for the StrongARM based Digital DNARD machine, also known
  769. as "Shark" (<http://www.shark-linux.de/shark.html>).
  770. config ARCH_TCC_926
  771. bool "Telechips TCC ARM926-based systems"
  772. select CLKSRC_MMIO
  773. select CPU_ARM926T
  774. select HAVE_CLK
  775. select CLKDEV_LOOKUP
  776. select GENERIC_CLOCKEVENTS
  777. help
  778. Support for Telechips TCC ARM926-based systems.
  779. config ARCH_U300
  780. bool "ST-Ericsson U300 Series"
  781. depends on MMU
  782. select CLKSRC_MMIO
  783. select CPU_ARM926T
  784. select HAVE_SCHED_CLOCK
  785. select HAVE_TCM
  786. select ARM_AMBA
  787. select ARM_PATCH_PHYS_VIRT
  788. select ARM_VIC
  789. select GENERIC_CLOCKEVENTS
  790. select CLKDEV_LOOKUP
  791. select HAVE_MACH_CLKDEV
  792. select GENERIC_GPIO
  793. select ARCH_REQUIRE_GPIOLIB
  794. select NEED_MACH_MEMORY_H
  795. help
  796. Support for ST-Ericsson U300 series mobile platforms.
  797. config ARCH_U8500
  798. bool "ST-Ericsson U8500 Series"
  799. select CPU_V7
  800. select ARM_AMBA
  801. select GENERIC_CLOCKEVENTS
  802. select CLKDEV_LOOKUP
  803. select ARCH_REQUIRE_GPIOLIB
  804. select ARCH_HAS_CPUFREQ
  805. help
  806. Support for ST-Ericsson's Ux500 architecture
  807. config ARCH_NOMADIK
  808. bool "STMicroelectronics Nomadik"
  809. select ARM_AMBA
  810. select ARM_VIC
  811. select CPU_ARM926T
  812. select CLKDEV_LOOKUP
  813. select GENERIC_CLOCKEVENTS
  814. select ARCH_REQUIRE_GPIOLIB
  815. help
  816. Support for the Nomadik platform by ST-Ericsson
  817. config ARCH_DAVINCI
  818. bool "TI DaVinci"
  819. select GENERIC_CLOCKEVENTS
  820. select ARCH_REQUIRE_GPIOLIB
  821. select ZONE_DMA
  822. select HAVE_IDE
  823. select CLKDEV_LOOKUP
  824. select GENERIC_ALLOCATOR
  825. select GENERIC_IRQ_CHIP
  826. select ARCH_HAS_HOLES_MEMORYMODEL
  827. help
  828. Support for TI's DaVinci platform.
  829. config ARCH_OMAP
  830. bool "TI OMAP"
  831. select HAVE_CLK
  832. select ARCH_REQUIRE_GPIOLIB
  833. select ARCH_HAS_CPUFREQ
  834. select CLKSRC_MMIO
  835. select GENERIC_CLOCKEVENTS
  836. select HAVE_SCHED_CLOCK
  837. select ARCH_HAS_HOLES_MEMORYMODEL
  838. help
  839. Support for TI's OMAP platform (OMAP1/2/3/4).
  840. config PLAT_SPEAR
  841. bool "ST SPEAr"
  842. select ARM_AMBA
  843. select ARCH_REQUIRE_GPIOLIB
  844. select CLKDEV_LOOKUP
  845. select CLKSRC_MMIO
  846. select GENERIC_CLOCKEVENTS
  847. select HAVE_CLK
  848. help
  849. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  850. config ARCH_VT8500
  851. bool "VIA/WonderMedia 85xx"
  852. select CPU_ARM926T
  853. select GENERIC_GPIO
  854. select ARCH_HAS_CPUFREQ
  855. select GENERIC_CLOCKEVENTS
  856. select ARCH_REQUIRE_GPIOLIB
  857. select HAVE_PWM
  858. help
  859. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  860. config ARCH_ZYNQ
  861. bool "Xilinx Zynq ARM Cortex A9 Platform"
  862. select CPU_V7
  863. select GENERIC_CLOCKEVENTS
  864. select CLKDEV_LOOKUP
  865. select ARM_GIC
  866. select ARM_AMBA
  867. select ICST
  868. select USE_OF
  869. help
  870. Support for Xilinx Zynq ARM Cortex A9 Platform
  871. endchoice
  872. #
  873. # This is sorted alphabetically by mach-* pathname. However, plat-*
  874. # Kconfigs may be included either alphabetically (according to the
  875. # plat- suffix) or along side the corresponding mach-* source.
  876. #
  877. source "arch/arm/mach-at91/Kconfig"
  878. source "arch/arm/mach-bcmring/Kconfig"
  879. source "arch/arm/mach-clps711x/Kconfig"
  880. source "arch/arm/mach-cns3xxx/Kconfig"
  881. source "arch/arm/mach-davinci/Kconfig"
  882. source "arch/arm/mach-dove/Kconfig"
  883. source "arch/arm/mach-ep93xx/Kconfig"
  884. source "arch/arm/mach-footbridge/Kconfig"
  885. source "arch/arm/mach-gemini/Kconfig"
  886. source "arch/arm/mach-h720x/Kconfig"
  887. source "arch/arm/mach-integrator/Kconfig"
  888. source "arch/arm/mach-iop32x/Kconfig"
  889. source "arch/arm/mach-iop33x/Kconfig"
  890. source "arch/arm/mach-iop13xx/Kconfig"
  891. source "arch/arm/mach-ixp4xx/Kconfig"
  892. source "arch/arm/mach-ixp2000/Kconfig"
  893. source "arch/arm/mach-ixp23xx/Kconfig"
  894. source "arch/arm/mach-kirkwood/Kconfig"
  895. source "arch/arm/mach-ks8695/Kconfig"
  896. source "arch/arm/mach-lpc32xx/Kconfig"
  897. source "arch/arm/mach-msm/Kconfig"
  898. source "arch/arm/mach-mv78xx0/Kconfig"
  899. source "arch/arm/plat-mxc/Kconfig"
  900. source "arch/arm/mach-mxs/Kconfig"
  901. source "arch/arm/mach-netx/Kconfig"
  902. source "arch/arm/mach-nomadik/Kconfig"
  903. source "arch/arm/plat-nomadik/Kconfig"
  904. source "arch/arm/plat-omap/Kconfig"
  905. source "arch/arm/mach-omap1/Kconfig"
  906. source "arch/arm/mach-omap2/Kconfig"
  907. source "arch/arm/mach-orion5x/Kconfig"
  908. source "arch/arm/mach-pxa/Kconfig"
  909. source "arch/arm/plat-pxa/Kconfig"
  910. source "arch/arm/mach-mmp/Kconfig"
  911. source "arch/arm/mach-realview/Kconfig"
  912. source "arch/arm/mach-sa1100/Kconfig"
  913. source "arch/arm/plat-samsung/Kconfig"
  914. source "arch/arm/plat-s3c24xx/Kconfig"
  915. source "arch/arm/plat-s5p/Kconfig"
  916. source "arch/arm/plat-spear/Kconfig"
  917. source "arch/arm/plat-tcc/Kconfig"
  918. if ARCH_S3C2410
  919. source "arch/arm/mach-s3c2410/Kconfig"
  920. source "arch/arm/mach-s3c2412/Kconfig"
  921. source "arch/arm/mach-s3c2416/Kconfig"
  922. source "arch/arm/mach-s3c2440/Kconfig"
  923. source "arch/arm/mach-s3c2443/Kconfig"
  924. endif
  925. if ARCH_S3C64XX
  926. source "arch/arm/mach-s3c64xx/Kconfig"
  927. endif
  928. source "arch/arm/mach-s5p64x0/Kconfig"
  929. source "arch/arm/mach-s5pc100/Kconfig"
  930. source "arch/arm/mach-s5pv210/Kconfig"
  931. source "arch/arm/mach-exynos/Kconfig"
  932. source "arch/arm/mach-shmobile/Kconfig"
  933. source "arch/arm/mach-tegra/Kconfig"
  934. source "arch/arm/mach-u300/Kconfig"
  935. source "arch/arm/mach-ux500/Kconfig"
  936. source "arch/arm/mach-versatile/Kconfig"
  937. source "arch/arm/mach-vexpress/Kconfig"
  938. source "arch/arm/plat-versatile/Kconfig"
  939. source "arch/arm/mach-vt8500/Kconfig"
  940. source "arch/arm/mach-w90x900/Kconfig"
  941. # Definitions to make life easier
  942. config ARCH_ACORN
  943. bool
  944. config PLAT_IOP
  945. bool
  946. select GENERIC_CLOCKEVENTS
  947. select HAVE_SCHED_CLOCK
  948. config PLAT_ORION
  949. bool
  950. select CLKSRC_MMIO
  951. select GENERIC_IRQ_CHIP
  952. select HAVE_SCHED_CLOCK
  953. config PLAT_PXA
  954. bool
  955. config PLAT_VERSATILE
  956. bool
  957. config ARM_TIMER_SP804
  958. bool
  959. select CLKSRC_MMIO
  960. source arch/arm/mm/Kconfig
  961. config IWMMXT
  962. bool "Enable iWMMXt support"
  963. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  964. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  965. help
  966. Enable support for iWMMXt context switching at run time if
  967. running on a CPU that supports it.
  968. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  969. config XSCALE_PMU
  970. bool
  971. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  972. default y
  973. config CPU_HAS_PMU
  974. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  975. (!ARCH_OMAP3 || OMAP3_EMU)
  976. default y
  977. bool
  978. config MULTI_IRQ_HANDLER
  979. bool
  980. help
  981. Allow each machine to specify it's own IRQ handler at run time.
  982. if !MMU
  983. source "arch/arm/Kconfig-nommu"
  984. endif
  985. config ARM_ERRATA_411920
  986. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  987. depends on CPU_V6 || CPU_V6K
  988. help
  989. Invalidation of the Instruction Cache operation can
  990. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  991. It does not affect the MPCore. This option enables the ARM Ltd.
  992. recommended workaround.
  993. config ARM_ERRATA_430973
  994. bool "ARM errata: Stale prediction on replaced interworking branch"
  995. depends on CPU_V7
  996. help
  997. This option enables the workaround for the 430973 Cortex-A8
  998. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  999. interworking branch is replaced with another code sequence at the
  1000. same virtual address, whether due to self-modifying code or virtual
  1001. to physical address re-mapping, Cortex-A8 does not recover from the
  1002. stale interworking branch prediction. This results in Cortex-A8
  1003. executing the new code sequence in the incorrect ARM or Thumb state.
  1004. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1005. and also flushes the branch target cache at every context switch.
  1006. Note that setting specific bits in the ACTLR register may not be
  1007. available in non-secure mode.
  1008. config ARM_ERRATA_458693
  1009. bool "ARM errata: Processor deadlock when a false hazard is created"
  1010. depends on CPU_V7
  1011. help
  1012. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1013. erratum. For very specific sequences of memory operations, it is
  1014. possible for a hazard condition intended for a cache line to instead
  1015. be incorrectly associated with a different cache line. This false
  1016. hazard might then cause a processor deadlock. The workaround enables
  1017. the L1 caching of the NEON accesses and disables the PLD instruction
  1018. in the ACTLR register. Note that setting specific bits in the ACTLR
  1019. register may not be available in non-secure mode.
  1020. config ARM_ERRATA_460075
  1021. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1022. depends on CPU_V7
  1023. help
  1024. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1025. erratum. Any asynchronous access to the L2 cache may encounter a
  1026. situation in which recent store transactions to the L2 cache are lost
  1027. and overwritten with stale memory contents from external memory. The
  1028. workaround disables the write-allocate mode for the L2 cache via the
  1029. ACTLR register. Note that setting specific bits in the ACTLR register
  1030. may not be available in non-secure mode.
  1031. config ARM_ERRATA_742230
  1032. bool "ARM errata: DMB operation may be faulty"
  1033. depends on CPU_V7 && SMP
  1034. help
  1035. This option enables the workaround for the 742230 Cortex-A9
  1036. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1037. between two write operations may not ensure the correct visibility
  1038. ordering of the two writes. This workaround sets a specific bit in
  1039. the diagnostic register of the Cortex-A9 which causes the DMB
  1040. instruction to behave as a DSB, ensuring the correct behaviour of
  1041. the two writes.
  1042. config ARM_ERRATA_742231
  1043. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1044. depends on CPU_V7 && SMP
  1045. help
  1046. This option enables the workaround for the 742231 Cortex-A9
  1047. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1048. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1049. accessing some data located in the same cache line, may get corrupted
  1050. data due to bad handling of the address hazard when the line gets
  1051. replaced from one of the CPUs at the same time as another CPU is
  1052. accessing it. This workaround sets specific bits in the diagnostic
  1053. register of the Cortex-A9 which reduces the linefill issuing
  1054. capabilities of the processor.
  1055. config PL310_ERRATA_588369
  1056. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1057. depends on CACHE_L2X0
  1058. help
  1059. The PL310 L2 cache controller implements three types of Clean &
  1060. Invalidate maintenance operations: by Physical Address
  1061. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1062. They are architecturally defined to behave as the execution of a
  1063. clean operation followed immediately by an invalidate operation,
  1064. both performing to the same memory location. This functionality
  1065. is not correctly implemented in PL310 as clean lines are not
  1066. invalidated as a result of these operations.
  1067. config ARM_ERRATA_720789
  1068. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1069. depends on CPU_V7 && SMP
  1070. help
  1071. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1072. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1073. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1074. As a consequence of this erratum, some TLB entries which should be
  1075. invalidated are not, resulting in an incoherency in the system page
  1076. tables. The workaround changes the TLB flushing routines to invalidate
  1077. entries regardless of the ASID.
  1078. config PL310_ERRATA_727915
  1079. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1080. depends on CACHE_L2X0
  1081. help
  1082. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1083. operation (offset 0x7FC). This operation runs in background so that
  1084. PL310 can handle normal accesses while it is in progress. Under very
  1085. rare circumstances, due to this erratum, write data can be lost when
  1086. PL310 treats a cacheable write transaction during a Clean &
  1087. Invalidate by Way operation.
  1088. config ARM_ERRATA_743622
  1089. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1090. depends on CPU_V7
  1091. help
  1092. This option enables the workaround for the 743622 Cortex-A9
  1093. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1094. optimisation in the Cortex-A9 Store Buffer may lead to data
  1095. corruption. This workaround sets a specific bit in the diagnostic
  1096. register of the Cortex-A9 which disables the Store Buffer
  1097. optimisation, preventing the defect from occurring. This has no
  1098. visible impact on the overall performance or power consumption of the
  1099. processor.
  1100. config ARM_ERRATA_751472
  1101. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1102. depends on CPU_V7 && SMP
  1103. help
  1104. This option enables the workaround for the 751472 Cortex-A9 (prior
  1105. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1106. completion of a following broadcasted operation if the second
  1107. operation is received by a CPU before the ICIALLUIS has completed,
  1108. potentially leading to corrupted entries in the cache or TLB.
  1109. config ARM_ERRATA_753970
  1110. bool "ARM errata: cache sync operation may be faulty"
  1111. depends on CACHE_PL310
  1112. help
  1113. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1114. Under some condition the effect of cache sync operation on
  1115. the store buffer still remains when the operation completes.
  1116. This means that the store buffer is always asked to drain and
  1117. this prevents it from merging any further writes. The workaround
  1118. is to replace the normal offset of cache sync operation (0x730)
  1119. by another offset targeting an unmapped PL310 register 0x740.
  1120. This has the same effect as the cache sync operation: store buffer
  1121. drain and waiting for all buffers empty.
  1122. config ARM_ERRATA_754322
  1123. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1124. depends on CPU_V7
  1125. help
  1126. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1127. r3p*) erratum. A speculative memory access may cause a page table walk
  1128. which starts prior to an ASID switch but completes afterwards. This
  1129. can populate the micro-TLB with a stale entry which may be hit with
  1130. the new ASID. This workaround places two dsb instructions in the mm
  1131. switching code so that no page table walks can cross the ASID switch.
  1132. config ARM_ERRATA_754327
  1133. bool "ARM errata: no automatic Store Buffer drain"
  1134. depends on CPU_V7 && SMP
  1135. help
  1136. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1137. r2p0) erratum. The Store Buffer does not have any automatic draining
  1138. mechanism and therefore a livelock may occur if an external agent
  1139. continuously polls a memory location waiting to observe an update.
  1140. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1141. written polling loops from denying visibility of updates to memory.
  1142. config ARM_ERRATA_364296
  1143. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1144. depends on CPU_V6 && !SMP
  1145. help
  1146. This options enables the workaround for the 364296 ARM1136
  1147. r0p2 erratum (possible cache data corruption with
  1148. hit-under-miss enabled). It sets the undocumented bit 31 in
  1149. the auxiliary control register and the FI bit in the control
  1150. register, thus disabling hit-under-miss without putting the
  1151. processor into full low interrupt latency mode. ARM11MPCore
  1152. is not affected.
  1153. config ARM_ERRATA_764369
  1154. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1155. depends on CPU_V7 && SMP
  1156. help
  1157. This option enables the workaround for erratum 764369
  1158. affecting Cortex-A9 MPCore with two or more processors (all
  1159. current revisions). Under certain timing circumstances, a data
  1160. cache line maintenance operation by MVA targeting an Inner
  1161. Shareable memory region may fail to proceed up to either the
  1162. Point of Coherency or to the Point of Unification of the
  1163. system. This workaround adds a DSB instruction before the
  1164. relevant cache maintenance functions and sets a specific bit
  1165. in the diagnostic control register of the SCU.
  1166. endmenu
  1167. source "arch/arm/common/Kconfig"
  1168. menu "Bus support"
  1169. config ARM_AMBA
  1170. bool
  1171. config ISA
  1172. bool
  1173. help
  1174. Find out whether you have ISA slots on your motherboard. ISA is the
  1175. name of a bus system, i.e. the way the CPU talks to the other stuff
  1176. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1177. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1178. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1179. # Select ISA DMA controller support
  1180. config ISA_DMA
  1181. bool
  1182. select ISA_DMA_API
  1183. # Select ISA DMA interface
  1184. config ISA_DMA_API
  1185. bool
  1186. config PCI
  1187. bool "PCI support" if MIGHT_HAVE_PCI
  1188. help
  1189. Find out whether you have a PCI motherboard. PCI is the name of a
  1190. bus system, i.e. the way the CPU talks to the other stuff inside
  1191. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1192. VESA. If you have PCI, say Y, otherwise N.
  1193. config PCI_DOMAINS
  1194. bool
  1195. depends on PCI
  1196. config PCI_NANOENGINE
  1197. bool "BSE nanoEngine PCI support"
  1198. depends on SA1100_NANOENGINE
  1199. help
  1200. Enable PCI on the BSE nanoEngine board.
  1201. config PCI_SYSCALL
  1202. def_bool PCI
  1203. # Select the host bridge type
  1204. config PCI_HOST_VIA82C505
  1205. bool
  1206. depends on PCI && ARCH_SHARK
  1207. default y
  1208. config PCI_HOST_ITE8152
  1209. bool
  1210. depends on PCI && MACH_ARMCORE
  1211. default y
  1212. select DMABOUNCE
  1213. source "drivers/pci/Kconfig"
  1214. source "drivers/pcmcia/Kconfig"
  1215. endmenu
  1216. menu "Kernel Features"
  1217. source "kernel/time/Kconfig"
  1218. config SMP
  1219. bool "Symmetric Multi-Processing"
  1220. depends on CPU_V6K || CPU_V7
  1221. depends on GENERIC_CLOCKEVENTS
  1222. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1223. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1224. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1225. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
  1226. depends on MMU
  1227. select USE_GENERIC_SMP_HELPERS
  1228. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1229. help
  1230. This enables support for systems with more than one CPU. If you have
  1231. a system with only one CPU, like most personal computers, say N. If
  1232. you have a system with more than one CPU, say Y.
  1233. If you say N here, the kernel will run on single and multiprocessor
  1234. machines, but will use only one CPU of a multiprocessor machine. If
  1235. you say Y here, the kernel will run on many, but not all, single
  1236. processor machines. On a single processor machine, the kernel will
  1237. run faster if you say N here.
  1238. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1239. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1240. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1241. If you don't know what to do here, say N.
  1242. config SMP_ON_UP
  1243. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1244. depends on EXPERIMENTAL
  1245. depends on SMP && !XIP_KERNEL
  1246. default y
  1247. help
  1248. SMP kernels contain instructions which fail on non-SMP processors.
  1249. Enabling this option allows the kernel to modify itself to make
  1250. these instructions safe. Disabling it allows about 1K of space
  1251. savings.
  1252. If you don't know what to do here, say Y.
  1253. config ARM_CPU_TOPOLOGY
  1254. bool "Support cpu topology definition"
  1255. depends on SMP && CPU_V7
  1256. default y
  1257. help
  1258. Support ARM cpu topology definition. The MPIDR register defines
  1259. affinity between processors which is then used to describe the cpu
  1260. topology of an ARM System.
  1261. config SCHED_MC
  1262. bool "Multi-core scheduler support"
  1263. depends on ARM_CPU_TOPOLOGY
  1264. help
  1265. Multi-core scheduler support improves the CPU scheduler's decision
  1266. making when dealing with multi-core CPU chips at a cost of slightly
  1267. increased overhead in some places. If unsure say N here.
  1268. config SCHED_SMT
  1269. bool "SMT scheduler support"
  1270. depends on ARM_CPU_TOPOLOGY
  1271. help
  1272. Improves the CPU scheduler's decision making when dealing with
  1273. MultiThreading at a cost of slightly increased overhead in some
  1274. places. If unsure say N here.
  1275. config HAVE_ARM_SCU
  1276. bool
  1277. help
  1278. This option enables support for the ARM system coherency unit
  1279. config HAVE_ARM_TWD
  1280. bool
  1281. depends on SMP
  1282. select TICK_ONESHOT
  1283. help
  1284. This options enables support for the ARM timer and watchdog unit
  1285. choice
  1286. prompt "Memory split"
  1287. default VMSPLIT_3G
  1288. help
  1289. Select the desired split between kernel and user memory.
  1290. If you are not absolutely sure what you are doing, leave this
  1291. option alone!
  1292. config VMSPLIT_3G
  1293. bool "3G/1G user/kernel split"
  1294. config VMSPLIT_2G
  1295. bool "2G/2G user/kernel split"
  1296. config VMSPLIT_1G
  1297. bool "1G/3G user/kernel split"
  1298. endchoice
  1299. config PAGE_OFFSET
  1300. hex
  1301. default 0x40000000 if VMSPLIT_1G
  1302. default 0x80000000 if VMSPLIT_2G
  1303. default 0xC0000000
  1304. config NR_CPUS
  1305. int "Maximum number of CPUs (2-32)"
  1306. range 2 32
  1307. depends on SMP
  1308. default "4"
  1309. config HOTPLUG_CPU
  1310. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1311. depends on SMP && HOTPLUG && EXPERIMENTAL
  1312. help
  1313. Say Y here to experiment with turning CPUs off and on. CPUs
  1314. can be controlled through /sys/devices/system/cpu.
  1315. config LOCAL_TIMERS
  1316. bool "Use local timer interrupts"
  1317. depends on SMP
  1318. default y
  1319. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1320. help
  1321. Enable support for local timers on SMP platforms, rather then the
  1322. legacy IPI broadcast method. Local timers allows the system
  1323. accounting to be spread across the timer interval, preventing a
  1324. "thundering herd" at every timer tick.
  1325. source kernel/Kconfig.preempt
  1326. config HZ
  1327. int
  1328. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1329. ARCH_S5PV210 || ARCH_EXYNOS4
  1330. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1331. default AT91_TIMER_HZ if ARCH_AT91
  1332. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1333. default 100
  1334. config THUMB2_KERNEL
  1335. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1336. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1337. select AEABI
  1338. select ARM_ASM_UNIFIED
  1339. select ARM_UNWIND
  1340. help
  1341. By enabling this option, the kernel will be compiled in
  1342. Thumb-2 mode. A compiler/assembler that understand the unified
  1343. ARM-Thumb syntax is needed.
  1344. If unsure, say N.
  1345. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1346. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1347. depends on THUMB2_KERNEL && MODULES
  1348. default y
  1349. help
  1350. Various binutils versions can resolve Thumb-2 branches to
  1351. locally-defined, preemptible global symbols as short-range "b.n"
  1352. branch instructions.
  1353. This is a problem, because there's no guarantee the final
  1354. destination of the symbol, or any candidate locations for a
  1355. trampoline, are within range of the branch. For this reason, the
  1356. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1357. relocation in modules at all, and it makes little sense to add
  1358. support.
  1359. The symptom is that the kernel fails with an "unsupported
  1360. relocation" error when loading some modules.
  1361. Until fixed tools are available, passing
  1362. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1363. code which hits this problem, at the cost of a bit of extra runtime
  1364. stack usage in some cases.
  1365. The problem is described in more detail at:
  1366. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1367. Only Thumb-2 kernels are affected.
  1368. Unless you are sure your tools don't have this problem, say Y.
  1369. config ARM_ASM_UNIFIED
  1370. bool
  1371. config AEABI
  1372. bool "Use the ARM EABI to compile the kernel"
  1373. help
  1374. This option allows for the kernel to be compiled using the latest
  1375. ARM ABI (aka EABI). This is only useful if you are using a user
  1376. space environment that is also compiled with EABI.
  1377. Since there are major incompatibilities between the legacy ABI and
  1378. EABI, especially with regard to structure member alignment, this
  1379. option also changes the kernel syscall calling convention to
  1380. disambiguate both ABIs and allow for backward compatibility support
  1381. (selected with CONFIG_OABI_COMPAT).
  1382. To use this you need GCC version 4.0.0 or later.
  1383. config OABI_COMPAT
  1384. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1385. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1386. default y
  1387. help
  1388. This option preserves the old syscall interface along with the
  1389. new (ARM EABI) one. It also provides a compatibility layer to
  1390. intercept syscalls that have structure arguments which layout
  1391. in memory differs between the legacy ABI and the new ARM EABI
  1392. (only for non "thumb" binaries). This option adds a tiny
  1393. overhead to all syscalls and produces a slightly larger kernel.
  1394. If you know you'll be using only pure EABI user space then you
  1395. can say N here. If this option is not selected and you attempt
  1396. to execute a legacy ABI binary then the result will be
  1397. UNPREDICTABLE (in fact it can be predicted that it won't work
  1398. at all). If in doubt say Y.
  1399. config ARCH_HAS_HOLES_MEMORYMODEL
  1400. bool
  1401. config ARCH_SPARSEMEM_ENABLE
  1402. bool
  1403. config ARCH_SPARSEMEM_DEFAULT
  1404. def_bool ARCH_SPARSEMEM_ENABLE
  1405. config ARCH_SELECT_MEMORY_MODEL
  1406. def_bool ARCH_SPARSEMEM_ENABLE
  1407. config HAVE_ARCH_PFN_VALID
  1408. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1409. config HIGHMEM
  1410. bool "High Memory Support"
  1411. depends on MMU
  1412. help
  1413. The address space of ARM processors is only 4 Gigabytes large
  1414. and it has to accommodate user address space, kernel address
  1415. space as well as some memory mapped IO. That means that, if you
  1416. have a large amount of physical memory and/or IO, not all of the
  1417. memory can be "permanently mapped" by the kernel. The physical
  1418. memory that is not permanently mapped is called "high memory".
  1419. Depending on the selected kernel/user memory split, minimum
  1420. vmalloc space and actual amount of RAM, you may not need this
  1421. option which should result in a slightly faster kernel.
  1422. If unsure, say n.
  1423. config HIGHPTE
  1424. bool "Allocate 2nd-level pagetables from highmem"
  1425. depends on HIGHMEM
  1426. config HW_PERF_EVENTS
  1427. bool "Enable hardware performance counter support for perf events"
  1428. depends on PERF_EVENTS && CPU_HAS_PMU
  1429. default y
  1430. help
  1431. Enable hardware performance counter support for perf events. If
  1432. disabled, perf events will use software events only.
  1433. source "mm/Kconfig"
  1434. config FORCE_MAX_ZONEORDER
  1435. int "Maximum zone order" if ARCH_SHMOBILE
  1436. range 11 64 if ARCH_SHMOBILE
  1437. default "9" if SA1111
  1438. default "11"
  1439. help
  1440. The kernel memory allocator divides physically contiguous memory
  1441. blocks into "zones", where each zone is a power of two number of
  1442. pages. This option selects the largest power of two that the kernel
  1443. keeps in the memory allocator. If you need to allocate very large
  1444. blocks of physically contiguous memory, then you may need to
  1445. increase this value.
  1446. This config option is actually maximum order plus one. For example,
  1447. a value of 11 means that the largest free memory block is 2^10 pages.
  1448. config LEDS
  1449. bool "Timer and CPU usage LEDs"
  1450. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1451. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1452. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1453. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1454. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1455. ARCH_AT91 || ARCH_DAVINCI || \
  1456. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1457. help
  1458. If you say Y here, the LEDs on your machine will be used
  1459. to provide useful information about your current system status.
  1460. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1461. be able to select which LEDs are active using the options below. If
  1462. you are compiling a kernel for the EBSA-110 or the LART however, the
  1463. red LED will simply flash regularly to indicate that the system is
  1464. still functional. It is safe to say Y here if you have a CATS
  1465. system, but the driver will do nothing.
  1466. config LEDS_TIMER
  1467. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1468. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1469. || MACH_OMAP_PERSEUS2
  1470. depends on LEDS
  1471. depends on !GENERIC_CLOCKEVENTS
  1472. default y if ARCH_EBSA110
  1473. help
  1474. If you say Y here, one of the system LEDs (the green one on the
  1475. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1476. will flash regularly to indicate that the system is still
  1477. operational. This is mainly useful to kernel hackers who are
  1478. debugging unstable kernels.
  1479. The LART uses the same LED for both Timer LED and CPU usage LED
  1480. functions. You may choose to use both, but the Timer LED function
  1481. will overrule the CPU usage LED.
  1482. config LEDS_CPU
  1483. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1484. !ARCH_OMAP) \
  1485. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1486. || MACH_OMAP_PERSEUS2
  1487. depends on LEDS
  1488. help
  1489. If you say Y here, the red LED will be used to give a good real
  1490. time indication of CPU usage, by lighting whenever the idle task
  1491. is not currently executing.
  1492. The LART uses the same LED for both Timer LED and CPU usage LED
  1493. functions. You may choose to use both, but the Timer LED function
  1494. will overrule the CPU usage LED.
  1495. config ALIGNMENT_TRAP
  1496. bool
  1497. depends on CPU_CP15_MMU
  1498. default y if !ARCH_EBSA110
  1499. select HAVE_PROC_CPU if PROC_FS
  1500. help
  1501. ARM processors cannot fetch/store information which is not
  1502. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1503. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1504. fetch/store instructions will be emulated in software if you say
  1505. here, which has a severe performance impact. This is necessary for
  1506. correct operation of some network protocols. With an IP-only
  1507. configuration it is safe to say N, otherwise say Y.
  1508. config UACCESS_WITH_MEMCPY
  1509. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1510. depends on MMU && EXPERIMENTAL
  1511. default y if CPU_FEROCEON
  1512. help
  1513. Implement faster copy_to_user and clear_user methods for CPU
  1514. cores where a 8-word STM instruction give significantly higher
  1515. memory write throughput than a sequence of individual 32bit stores.
  1516. A possible side effect is a slight increase in scheduling latency
  1517. between threads sharing the same address space if they invoke
  1518. such copy operations with large buffers.
  1519. However, if the CPU data cache is using a write-allocate mode,
  1520. this option is unlikely to provide any performance gain.
  1521. config SECCOMP
  1522. bool
  1523. prompt "Enable seccomp to safely compute untrusted bytecode"
  1524. ---help---
  1525. This kernel feature is useful for number crunching applications
  1526. that may need to compute untrusted bytecode during their
  1527. execution. By using pipes or other transports made available to
  1528. the process as file descriptors supporting the read/write
  1529. syscalls, it's possible to isolate those applications in
  1530. their own address space using seccomp. Once seccomp is
  1531. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1532. and the task is only allowed to execute a few safe syscalls
  1533. defined by each seccomp mode.
  1534. config CC_STACKPROTECTOR
  1535. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1536. depends on EXPERIMENTAL
  1537. help
  1538. This option turns on the -fstack-protector GCC feature. This
  1539. feature puts, at the beginning of functions, a canary value on
  1540. the stack just before the return address, and validates
  1541. the value just before actually returning. Stack based buffer
  1542. overflows (that need to overwrite this return address) now also
  1543. overwrite the canary, which gets detected and the attack is then
  1544. neutralized via a kernel panic.
  1545. This feature requires gcc version 4.2 or above.
  1546. config DEPRECATED_PARAM_STRUCT
  1547. bool "Provide old way to pass kernel parameters"
  1548. help
  1549. This was deprecated in 2001 and announced to live on for 5 years.
  1550. Some old boot loaders still use this way.
  1551. endmenu
  1552. menu "Boot options"
  1553. config USE_OF
  1554. bool "Flattened Device Tree support"
  1555. select OF
  1556. select OF_EARLY_FLATTREE
  1557. select IRQ_DOMAIN
  1558. help
  1559. Include support for flattened device tree machine descriptions.
  1560. # Compressed boot loader in ROM. Yes, we really want to ask about
  1561. # TEXT and BSS so we preserve their values in the config files.
  1562. config ZBOOT_ROM_TEXT
  1563. hex "Compressed ROM boot loader base address"
  1564. default "0"
  1565. help
  1566. The physical address at which the ROM-able zImage is to be
  1567. placed in the target. Platforms which normally make use of
  1568. ROM-able zImage formats normally set this to a suitable
  1569. value in their defconfig file.
  1570. If ZBOOT_ROM is not enabled, this has no effect.
  1571. config ZBOOT_ROM_BSS
  1572. hex "Compressed ROM boot loader BSS address"
  1573. default "0"
  1574. help
  1575. The base address of an area of read/write memory in the target
  1576. for the ROM-able zImage which must be available while the
  1577. decompressor is running. It must be large enough to hold the
  1578. entire decompressed kernel plus an additional 128 KiB.
  1579. Platforms which normally make use of ROM-able zImage formats
  1580. normally set this to a suitable value in their defconfig file.
  1581. If ZBOOT_ROM is not enabled, this has no effect.
  1582. config ZBOOT_ROM
  1583. bool "Compressed boot loader in ROM/flash"
  1584. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1585. help
  1586. Say Y here if you intend to execute your compressed kernel image
  1587. (zImage) directly from ROM or flash. If unsure, say N.
  1588. choice
  1589. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1590. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1591. default ZBOOT_ROM_NONE
  1592. help
  1593. Include experimental SD/MMC loading code in the ROM-able zImage.
  1594. With this enabled it is possible to write the the ROM-able zImage
  1595. kernel image to an MMC or SD card and boot the kernel straight
  1596. from the reset vector. At reset the processor Mask ROM will load
  1597. the first part of the the ROM-able zImage which in turn loads the
  1598. rest the kernel image to RAM.
  1599. config ZBOOT_ROM_NONE
  1600. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1601. help
  1602. Do not load image from SD or MMC
  1603. config ZBOOT_ROM_MMCIF
  1604. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1605. help
  1606. Load image from MMCIF hardware block.
  1607. config ZBOOT_ROM_SH_MOBILE_SDHI
  1608. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1609. help
  1610. Load image from SDHI hardware block
  1611. endchoice
  1612. config ARM_APPENDED_DTB
  1613. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1614. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1615. help
  1616. With this option, the boot code will look for a device tree binary
  1617. (DTB) appended to zImage
  1618. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1619. This is meant as a backward compatibility convenience for those
  1620. systems with a bootloader that can't be upgraded to accommodate
  1621. the documented boot protocol using a device tree.
  1622. Beware that there is very little in terms of protection against
  1623. this option being confused by leftover garbage in memory that might
  1624. look like a DTB header after a reboot if no actual DTB is appended
  1625. to zImage. Do not leave this option active in a production kernel
  1626. if you don't intend to always append a DTB. Proper passing of the
  1627. location into r2 of a bootloader provided DTB is always preferable
  1628. to this option.
  1629. config ARM_ATAG_DTB_COMPAT
  1630. bool "Supplement the appended DTB with traditional ATAG information"
  1631. depends on ARM_APPENDED_DTB
  1632. help
  1633. Some old bootloaders can't be updated to a DTB capable one, yet
  1634. they provide ATAGs with memory configuration, the ramdisk address,
  1635. the kernel cmdline string, etc. Such information is dynamically
  1636. provided by the bootloader and can't always be stored in a static
  1637. DTB. To allow a device tree enabled kernel to be used with such
  1638. bootloaders, this option allows zImage to extract the information
  1639. from the ATAG list and store it at run time into the appended DTB.
  1640. config CMDLINE
  1641. string "Default kernel command string"
  1642. default ""
  1643. help
  1644. On some architectures (EBSA110 and CATS), there is currently no way
  1645. for the boot loader to pass arguments to the kernel. For these
  1646. architectures, you should supply some command-line options at build
  1647. time by entering them here. As a minimum, you should specify the
  1648. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1649. choice
  1650. prompt "Kernel command line type" if CMDLINE != ""
  1651. default CMDLINE_FROM_BOOTLOADER
  1652. config CMDLINE_FROM_BOOTLOADER
  1653. bool "Use bootloader kernel arguments if available"
  1654. help
  1655. Uses the command-line options passed by the boot loader. If
  1656. the boot loader doesn't provide any, the default kernel command
  1657. string provided in CMDLINE will be used.
  1658. config CMDLINE_EXTEND
  1659. bool "Extend bootloader kernel arguments"
  1660. help
  1661. The command-line arguments provided by the boot loader will be
  1662. appended to the default kernel command string.
  1663. config CMDLINE_FORCE
  1664. bool "Always use the default kernel command string"
  1665. help
  1666. Always use the default kernel command string, even if the boot
  1667. loader passes other arguments to the kernel.
  1668. This is useful if you cannot or don't want to change the
  1669. command-line options your boot loader passes to the kernel.
  1670. endchoice
  1671. config XIP_KERNEL
  1672. bool "Kernel Execute-In-Place from ROM"
  1673. depends on !ZBOOT_ROM
  1674. help
  1675. Execute-In-Place allows the kernel to run from non-volatile storage
  1676. directly addressable by the CPU, such as NOR flash. This saves RAM
  1677. space since the text section of the kernel is not loaded from flash
  1678. to RAM. Read-write sections, such as the data section and stack,
  1679. are still copied to RAM. The XIP kernel is not compressed since
  1680. it has to run directly from flash, so it will take more space to
  1681. store it. The flash address used to link the kernel object files,
  1682. and for storing it, is configuration dependent. Therefore, if you
  1683. say Y here, you must know the proper physical address where to
  1684. store the kernel image depending on your own flash memory usage.
  1685. Also note that the make target becomes "make xipImage" rather than
  1686. "make zImage" or "make Image". The final kernel binary to put in
  1687. ROM memory will be arch/arm/boot/xipImage.
  1688. If unsure, say N.
  1689. config XIP_PHYS_ADDR
  1690. hex "XIP Kernel Physical Location"
  1691. depends on XIP_KERNEL
  1692. default "0x00080000"
  1693. help
  1694. This is the physical address in your flash memory the kernel will
  1695. be linked for and stored to. This address is dependent on your
  1696. own flash usage.
  1697. config KEXEC
  1698. bool "Kexec system call (EXPERIMENTAL)"
  1699. depends on EXPERIMENTAL
  1700. help
  1701. kexec is a system call that implements the ability to shutdown your
  1702. current kernel, and to start another kernel. It is like a reboot
  1703. but it is independent of the system firmware. And like a reboot
  1704. you can start any kernel with it, not just Linux.
  1705. It is an ongoing process to be certain the hardware in a machine
  1706. is properly shutdown, so do not be surprised if this code does not
  1707. initially work for you. It may help to enable device hotplugging
  1708. support.
  1709. config ATAGS_PROC
  1710. bool "Export atags in procfs"
  1711. depends on KEXEC
  1712. default y
  1713. help
  1714. Should the atags used to boot the kernel be exported in an "atags"
  1715. file in procfs. Useful with kexec.
  1716. config CRASH_DUMP
  1717. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1718. depends on EXPERIMENTAL
  1719. help
  1720. Generate crash dump after being started by kexec. This should
  1721. be normally only set in special crash dump kernels which are
  1722. loaded in the main kernel with kexec-tools into a specially
  1723. reserved region and then later executed after a crash by
  1724. kdump/kexec. The crash dump kernel must be compiled to a
  1725. memory address not used by the main kernel
  1726. For more details see Documentation/kdump/kdump.txt
  1727. config AUTO_ZRELADDR
  1728. bool "Auto calculation of the decompressed kernel image address"
  1729. depends on !ZBOOT_ROM && !ARCH_U300
  1730. help
  1731. ZRELADDR is the physical address where the decompressed kernel
  1732. image will be placed. If AUTO_ZRELADDR is selected, the address
  1733. will be determined at run-time by masking the current IP with
  1734. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1735. from start of memory.
  1736. endmenu
  1737. menu "CPU Power Management"
  1738. if ARCH_HAS_CPUFREQ
  1739. source "drivers/cpufreq/Kconfig"
  1740. config CPU_FREQ_IMX
  1741. tristate "CPUfreq driver for i.MX CPUs"
  1742. depends on ARCH_MXC && CPU_FREQ
  1743. help
  1744. This enables the CPUfreq driver for i.MX CPUs.
  1745. config CPU_FREQ_SA1100
  1746. bool
  1747. config CPU_FREQ_SA1110
  1748. bool
  1749. config CPU_FREQ_INTEGRATOR
  1750. tristate "CPUfreq driver for ARM Integrator CPUs"
  1751. depends on ARCH_INTEGRATOR && CPU_FREQ
  1752. default y
  1753. help
  1754. This enables the CPUfreq driver for ARM Integrator CPUs.
  1755. For details, take a look at <file:Documentation/cpu-freq>.
  1756. If in doubt, say Y.
  1757. config CPU_FREQ_PXA
  1758. bool
  1759. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1760. default y
  1761. select CPU_FREQ_TABLE
  1762. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1763. config CPU_FREQ_S3C
  1764. bool
  1765. help
  1766. Internal configuration node for common cpufreq on Samsung SoC
  1767. config CPU_FREQ_S3C24XX
  1768. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1769. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1770. select CPU_FREQ_S3C
  1771. help
  1772. This enables the CPUfreq driver for the Samsung S3C24XX family
  1773. of CPUs.
  1774. For details, take a look at <file:Documentation/cpu-freq>.
  1775. If in doubt, say N.
  1776. config CPU_FREQ_S3C24XX_PLL
  1777. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1778. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1779. help
  1780. Compile in support for changing the PLL frequency from the
  1781. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1782. after a frequency change, so by default it is not enabled.
  1783. This also means that the PLL tables for the selected CPU(s) will
  1784. be built which may increase the size of the kernel image.
  1785. config CPU_FREQ_S3C24XX_DEBUG
  1786. bool "Debug CPUfreq Samsung driver core"
  1787. depends on CPU_FREQ_S3C24XX
  1788. help
  1789. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1790. config CPU_FREQ_S3C24XX_IODEBUG
  1791. bool "Debug CPUfreq Samsung driver IO timing"
  1792. depends on CPU_FREQ_S3C24XX
  1793. help
  1794. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1795. config CPU_FREQ_S3C24XX_DEBUGFS
  1796. bool "Export debugfs for CPUFreq"
  1797. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1798. help
  1799. Export status information via debugfs.
  1800. endif
  1801. source "drivers/cpuidle/Kconfig"
  1802. endmenu
  1803. menu "Floating point emulation"
  1804. comment "At least one emulation must be selected"
  1805. config FPE_NWFPE
  1806. bool "NWFPE math emulation"
  1807. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1808. ---help---
  1809. Say Y to include the NWFPE floating point emulator in the kernel.
  1810. This is necessary to run most binaries. Linux does not currently
  1811. support floating point hardware so you need to say Y here even if
  1812. your machine has an FPA or floating point co-processor podule.
  1813. You may say N here if you are going to load the Acorn FPEmulator
  1814. early in the bootup.
  1815. config FPE_NWFPE_XP
  1816. bool "Support extended precision"
  1817. depends on FPE_NWFPE
  1818. help
  1819. Say Y to include 80-bit support in the kernel floating-point
  1820. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1821. Note that gcc does not generate 80-bit operations by default,
  1822. so in most cases this option only enlarges the size of the
  1823. floating point emulator without any good reason.
  1824. You almost surely want to say N here.
  1825. config FPE_FASTFPE
  1826. bool "FastFPE math emulation (EXPERIMENTAL)"
  1827. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1828. ---help---
  1829. Say Y here to include the FAST floating point emulator in the kernel.
  1830. This is an experimental much faster emulator which now also has full
  1831. precision for the mantissa. It does not support any exceptions.
  1832. It is very simple, and approximately 3-6 times faster than NWFPE.
  1833. It should be sufficient for most programs. It may be not suitable
  1834. for scientific calculations, but you have to check this for yourself.
  1835. If you do not feel you need a faster FP emulation you should better
  1836. choose NWFPE.
  1837. config VFP
  1838. bool "VFP-format floating point maths"
  1839. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1840. help
  1841. Say Y to include VFP support code in the kernel. This is needed
  1842. if your hardware includes a VFP unit.
  1843. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1844. release notes and additional status information.
  1845. Say N if your target does not have VFP hardware.
  1846. config VFPv3
  1847. bool
  1848. depends on VFP
  1849. default y if CPU_V7
  1850. config NEON
  1851. bool "Advanced SIMD (NEON) Extension support"
  1852. depends on VFPv3 && CPU_V7
  1853. help
  1854. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1855. Extension.
  1856. endmenu
  1857. menu "Userspace binary formats"
  1858. source "fs/Kconfig.binfmt"
  1859. config ARTHUR
  1860. tristate "RISC OS personality"
  1861. depends on !AEABI
  1862. help
  1863. Say Y here to include the kernel code necessary if you want to run
  1864. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1865. experimental; if this sounds frightening, say N and sleep in peace.
  1866. You can also say M here to compile this support as a module (which
  1867. will be called arthur).
  1868. endmenu
  1869. menu "Power management options"
  1870. source "kernel/power/Kconfig"
  1871. config ARCH_SUSPEND_POSSIBLE
  1872. depends on !ARCH_S5PC100
  1873. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1874. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1875. def_bool y
  1876. config ARM_CPU_SUSPEND
  1877. def_bool PM_SLEEP
  1878. endmenu
  1879. source "net/Kconfig"
  1880. source "drivers/Kconfig"
  1881. source "fs/Kconfig"
  1882. source "arch/arm/Kconfig.debug"
  1883. source "security/Kconfig"
  1884. source "crypto/Kconfig"
  1885. source "lib/Kconfig"