Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_HAVE_CUSTOM_GPIO_H
  5. select HAVE_AOUT
  6. select HAVE_DMA_API_DEBUG
  7. select HAVE_IDE if PCI || ISA || PCMCIA
  8. select HAVE_DMA_ATTRS
  9. select HAVE_DMA_CONTIGUOUS if (CPU_V6 || CPU_V6K || CPU_V7)
  10. select HAVE_MEMBLOCK
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  14. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  15. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  16. select HAVE_ARCH_KGDB
  17. select HAVE_ARCH_TRACEHOOK
  18. select HAVE_KPROBES if !XIP_KERNEL
  19. select HAVE_KRETPROBES if (HAVE_KPROBES)
  20. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  22. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  23. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  24. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  25. select HAVE_GENERIC_DMA_COHERENT
  26. select HAVE_KERNEL_GZIP
  27. select HAVE_KERNEL_LZO
  28. select HAVE_KERNEL_LZMA
  29. select HAVE_KERNEL_XZ
  30. select HAVE_IRQ_WORK
  31. select HAVE_PERF_EVENTS
  32. select PERF_USE_VMALLOC
  33. select HAVE_REGS_AND_STACK_ACCESS_API
  34. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  35. select HAVE_C_RECORDMCOUNT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HARDIRQS_SW_RESEND
  38. select GENERIC_IRQ_PROBE
  39. select GENERIC_IRQ_SHOW
  40. select GENERIC_IRQ_PROBE
  41. select HARDIRQS_SW_RESEND
  42. select CPU_PM if (SUSPEND || CPU_IDLE)
  43. select GENERIC_PCI_IOMAP
  44. select HAVE_BPF_JIT
  45. select GENERIC_SMP_IDLE_THREAD
  46. select KTIME_SCALAR
  47. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  48. help
  49. The ARM series is a line of low-power-consumption RISC chip designs
  50. licensed by ARM Ltd and targeted at embedded applications and
  51. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  52. manufactured, but legacy ARM-based PC hardware remains popular in
  53. Europe. There is an ARM Linux project with a web page at
  54. <http://www.arm.linux.org.uk/>.
  55. config ARM_HAS_SG_CHAIN
  56. bool
  57. config NEED_SG_DMA_LENGTH
  58. bool
  59. config ARM_DMA_USE_IOMMU
  60. select NEED_SG_DMA_LENGTH
  61. select ARM_HAS_SG_CHAIN
  62. bool
  63. config HAVE_PWM
  64. bool
  65. config MIGHT_HAVE_PCI
  66. bool
  67. config SYS_SUPPORTS_APM_EMULATION
  68. bool
  69. config GENERIC_GPIO
  70. bool
  71. config HAVE_TCM
  72. bool
  73. select GENERIC_ALLOCATOR
  74. config HAVE_PROC_CPU
  75. bool
  76. config NO_IOPORT
  77. bool
  78. config EISA
  79. bool
  80. ---help---
  81. The Extended Industry Standard Architecture (EISA) bus was
  82. developed as an open alternative to the IBM MicroChannel bus.
  83. The EISA bus provided some of the features of the IBM MicroChannel
  84. bus while maintaining backward compatibility with cards made for
  85. the older ISA bus. The EISA bus saw limited use between 1988 and
  86. 1995 when it was made obsolete by the PCI bus.
  87. Say Y here if you are building a kernel for an EISA-based machine.
  88. Otherwise, say N.
  89. config SBUS
  90. bool
  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 GENERIC_LOCKBREAK
  105. bool
  106. default y
  107. depends on SMP && PREEMPT
  108. config RWSEM_GENERIC_SPINLOCK
  109. bool
  110. default y
  111. config RWSEM_XCHGADD_ALGORITHM
  112. bool
  113. config ARCH_HAS_ILOG2_U32
  114. bool
  115. config ARCH_HAS_ILOG2_U64
  116. bool
  117. config ARCH_HAS_CPUFREQ
  118. bool
  119. help
  120. Internal node to signify that the ARCH has CPUFREQ support
  121. and that the relevant menu configurations are displayed for
  122. it.
  123. config GENERIC_HWEIGHT
  124. bool
  125. default y
  126. config GENERIC_CALIBRATE_DELAY
  127. bool
  128. default y
  129. config ARCH_MAY_HAVE_PC_FDC
  130. bool
  131. config ZONE_DMA
  132. bool
  133. config NEED_DMA_MAP_STATE
  134. def_bool y
  135. config ARCH_HAS_DMA_SET_COHERENT_MASK
  136. bool
  137. config GENERIC_ISA_DMA
  138. bool
  139. config FIQ
  140. bool
  141. config NEED_RET_TO_USER
  142. bool
  143. config ARCH_MTD_XIP
  144. bool
  145. config VECTORS_BASE
  146. hex
  147. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  148. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  149. default 0x00000000
  150. help
  151. The base address of exception vectors.
  152. config ARM_PATCH_PHYS_VIRT
  153. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  154. default y
  155. depends on !XIP_KERNEL && MMU
  156. depends on !ARCH_REALVIEW || !SPARSEMEM
  157. help
  158. Patch phys-to-virt and virt-to-phys translation functions at
  159. boot and module load time according to the position of the
  160. kernel in system memory.
  161. This can only be used with non-XIP MMU kernels where the base
  162. of physical memory is at a 16MB boundary.
  163. Only disable this option if you know that you do not require
  164. this feature (eg, building a kernel for a single machine) and
  165. you need to shrink the kernel to the minimal size.
  166. config NEED_MACH_IO_H
  167. bool
  168. help
  169. Select this when mach/io.h is required to provide special
  170. definitions for this platform. The need for mach/io.h should
  171. be avoided when possible.
  172. config NEED_MACH_MEMORY_H
  173. bool
  174. help
  175. Select this when mach/memory.h is required to provide special
  176. definitions for this platform. The need for mach/memory.h should
  177. be avoided when possible.
  178. config PHYS_OFFSET
  179. hex "Physical address of main memory" if MMU
  180. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  181. default DRAM_BASE if !MMU
  182. help
  183. Please provide the physical address corresponding to the
  184. location of main memory in your system.
  185. config GENERIC_BUG
  186. def_bool y
  187. depends on BUG
  188. source "init/Kconfig"
  189. source "kernel/Kconfig.freezer"
  190. menu "System Type"
  191. config MMU
  192. bool "MMU-based Paged Memory Management Support"
  193. default y
  194. help
  195. Select if you want MMU-based virtualised addressing space
  196. support by paged memory management. If unsure, say 'Y'.
  197. #
  198. # The "ARM system type" choice list is ordered alphabetically by option
  199. # text. Please add new entries in the option alphabetic order.
  200. #
  201. choice
  202. prompt "ARM system type"
  203. default ARCH_VERSATILE
  204. config ARCH_INTEGRATOR
  205. bool "ARM Ltd. Integrator family"
  206. select ARM_AMBA
  207. select ARCH_HAS_CPUFREQ
  208. select CLKDEV_LOOKUP
  209. select HAVE_MACH_CLKDEV
  210. select HAVE_TCM
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select PLAT_VERSATILE
  214. select PLAT_VERSATILE_FPGA_IRQ
  215. select NEED_MACH_IO_H
  216. select NEED_MACH_MEMORY_H
  217. select SPARSE_IRQ
  218. select MULTI_IRQ_HANDLER
  219. help
  220. Support for ARM's Integrator platform.
  221. config ARCH_REALVIEW
  222. bool "ARM Ltd. RealView family"
  223. select ARM_AMBA
  224. select CLKDEV_LOOKUP
  225. select HAVE_MACH_CLKDEV
  226. select ICST
  227. select GENERIC_CLOCKEVENTS
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select PLAT_VERSATILE
  230. select PLAT_VERSATILE_CLCD
  231. select ARM_TIMER_SP804
  232. select GPIO_PL061 if GPIOLIB
  233. select NEED_MACH_MEMORY_H
  234. help
  235. This enables support for ARM Ltd RealView boards.
  236. config ARCH_VERSATILE
  237. bool "ARM Ltd. Versatile family"
  238. select ARM_AMBA
  239. select ARM_VIC
  240. select CLKDEV_LOOKUP
  241. select HAVE_MACH_CLKDEV
  242. select ICST
  243. select GENERIC_CLOCKEVENTS
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select NEED_MACH_IO_H if PCI
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLCD
  248. select PLAT_VERSATILE_FPGA_IRQ
  249. select ARM_TIMER_SP804
  250. help
  251. This enables support for ARM Ltd Versatile board.
  252. config ARCH_VEXPRESS
  253. bool "ARM Ltd. Versatile Express family"
  254. select ARCH_WANT_OPTIONAL_GPIOLIB
  255. select ARM_AMBA
  256. select ARM_TIMER_SP804
  257. select CLKDEV_LOOKUP
  258. select HAVE_MACH_CLKDEV
  259. select GENERIC_CLOCKEVENTS
  260. select HAVE_CLK
  261. select HAVE_PATA_PLATFORM
  262. select ICST
  263. select NO_IOPORT
  264. select PLAT_VERSATILE
  265. select PLAT_VERSATILE_CLCD
  266. help
  267. This enables support for the ARM Ltd Versatile Express boards.
  268. config ARCH_AT91
  269. bool "Atmel AT91"
  270. select ARCH_REQUIRE_GPIOLIB
  271. select HAVE_CLK
  272. select CLKDEV_LOOKUP
  273. select IRQ_DOMAIN
  274. select NEED_MACH_IO_H if PCCARD
  275. help
  276. This enables support for systems based on Atmel
  277. AT91RM9200 and AT91SAM9* processors.
  278. config ARCH_BCMRING
  279. bool "Broadcom BCMRING"
  280. depends on MMU
  281. select CPU_V6
  282. select ARM_AMBA
  283. select ARM_TIMER_SP804
  284. select CLKDEV_LOOKUP
  285. select GENERIC_CLOCKEVENTS
  286. select ARCH_WANT_OPTIONAL_GPIOLIB
  287. help
  288. Support for Broadcom's BCMRing platform.
  289. config ARCH_HIGHBANK
  290. bool "Calxeda Highbank-based"
  291. select ARCH_WANT_OPTIONAL_GPIOLIB
  292. select ARM_AMBA
  293. select ARM_GIC
  294. select ARM_TIMER_SP804
  295. select CACHE_L2X0
  296. select CLKDEV_LOOKUP
  297. select CPU_V7
  298. select GENERIC_CLOCKEVENTS
  299. select HAVE_ARM_SCU
  300. select HAVE_SMP
  301. select SPARSE_IRQ
  302. select USE_OF
  303. help
  304. Support for the Calxeda Highbank SoC based boards.
  305. config ARCH_CLPS711X
  306. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  307. select CPU_ARM720T
  308. select ARCH_USES_GETTIMEOFFSET
  309. select NEED_MACH_MEMORY_H
  310. help
  311. Support for Cirrus Logic 711x/721x/731x based boards.
  312. config ARCH_CNS3XXX
  313. bool "Cavium Networks CNS3XXX family"
  314. select CPU_V6K
  315. select GENERIC_CLOCKEVENTS
  316. select ARM_GIC
  317. select MIGHT_HAVE_CACHE_L2X0
  318. select MIGHT_HAVE_PCI
  319. select PCI_DOMAINS if PCI
  320. help
  321. Support for Cavium Networks CNS3XXX platform.
  322. config ARCH_GEMINI
  323. bool "Cortina Systems Gemini"
  324. select CPU_FA526
  325. select ARCH_REQUIRE_GPIOLIB
  326. select ARCH_USES_GETTIMEOFFSET
  327. help
  328. Support for the Cortina Systems Gemini family SoCs
  329. config ARCH_PRIMA2
  330. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  331. select CPU_V7
  332. select NO_IOPORT
  333. select GENERIC_CLOCKEVENTS
  334. select CLKDEV_LOOKUP
  335. select GENERIC_IRQ_CHIP
  336. select MIGHT_HAVE_CACHE_L2X0
  337. select PINCTRL
  338. select PINCTRL_SIRF
  339. select USE_OF
  340. select ZONE_DMA
  341. help
  342. Support for CSR SiRFSoC ARM Cortex A9 Platform
  343. config ARCH_EBSA110
  344. bool "EBSA-110"
  345. select CPU_SA110
  346. select ISA
  347. select NO_IOPORT
  348. select ARCH_USES_GETTIMEOFFSET
  349. select NEED_MACH_IO_H
  350. select NEED_MACH_MEMORY_H
  351. help
  352. This is an evaluation board for the StrongARM processor available
  353. from Digital. It has limited hardware on-board, including an
  354. Ethernet interface, two PCMCIA sockets, two serial ports and a
  355. parallel port.
  356. config ARCH_EP93XX
  357. bool "EP93xx-based"
  358. select CPU_ARM920T
  359. select ARM_AMBA
  360. select ARM_VIC
  361. select CLKDEV_LOOKUP
  362. select ARCH_REQUIRE_GPIOLIB
  363. select ARCH_HAS_HOLES_MEMORYMODEL
  364. select ARCH_USES_GETTIMEOFFSET
  365. select NEED_MACH_MEMORY_H
  366. help
  367. This enables support for the Cirrus EP93xx series of CPUs.
  368. config ARCH_FOOTBRIDGE
  369. bool "FootBridge"
  370. select CPU_SA110
  371. select FOOTBRIDGE
  372. select GENERIC_CLOCKEVENTS
  373. select HAVE_IDE
  374. select NEED_MACH_IO_H
  375. select NEED_MACH_MEMORY_H
  376. help
  377. Support for systems based on the DC21285 companion chip
  378. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  379. config ARCH_MXC
  380. bool "Freescale MXC/iMX-based"
  381. select GENERIC_CLOCKEVENTS
  382. select ARCH_REQUIRE_GPIOLIB
  383. select CLKDEV_LOOKUP
  384. select CLKSRC_MMIO
  385. select GENERIC_IRQ_CHIP
  386. select MULTI_IRQ_HANDLER
  387. help
  388. Support for Freescale MXC/iMX-based family of processors
  389. config ARCH_MXS
  390. bool "Freescale MXS-based"
  391. select GENERIC_CLOCKEVENTS
  392. select ARCH_REQUIRE_GPIOLIB
  393. select CLKDEV_LOOKUP
  394. select CLKSRC_MMIO
  395. select COMMON_CLK
  396. select HAVE_CLK_PREPARE
  397. select PINCTRL
  398. select USE_OF
  399. help
  400. Support for Freescale MXS-based family of processors
  401. config ARCH_NETX
  402. bool "Hilscher NetX based"
  403. select CLKSRC_MMIO
  404. select CPU_ARM926T
  405. select ARM_VIC
  406. select GENERIC_CLOCKEVENTS
  407. help
  408. This enables support for systems based on the Hilscher NetX Soc
  409. config ARCH_H720X
  410. bool "Hynix HMS720x-based"
  411. select CPU_ARM720T
  412. select ISA_DMA_API
  413. select ARCH_USES_GETTIMEOFFSET
  414. help
  415. This enables support for systems based on the Hynix HMS720x
  416. config ARCH_IOP13XX
  417. bool "IOP13xx-based"
  418. depends on MMU
  419. select CPU_XSC3
  420. select PLAT_IOP
  421. select PCI
  422. select ARCH_SUPPORTS_MSI
  423. select VMSPLIT_1G
  424. select NEED_MACH_IO_H
  425. select NEED_MACH_MEMORY_H
  426. select NEED_RET_TO_USER
  427. help
  428. Support for Intel's IOP13XX (XScale) family of processors.
  429. config ARCH_IOP32X
  430. bool "IOP32x-based"
  431. depends on MMU
  432. select CPU_XSCALE
  433. select NEED_MACH_IO_H
  434. select NEED_RET_TO_USER
  435. select PLAT_IOP
  436. select PCI
  437. select ARCH_REQUIRE_GPIOLIB
  438. help
  439. Support for Intel's 80219 and IOP32X (XScale) family of
  440. processors.
  441. config ARCH_IOP33X
  442. bool "IOP33x-based"
  443. depends on MMU
  444. select CPU_XSCALE
  445. select NEED_MACH_IO_H
  446. select NEED_RET_TO_USER
  447. select PLAT_IOP
  448. select PCI
  449. select ARCH_REQUIRE_GPIOLIB
  450. help
  451. Support for Intel's IOP33X (XScale) family of processors.
  452. config ARCH_IXP4XX
  453. bool "IXP4xx-based"
  454. depends on MMU
  455. select ARCH_HAS_DMA_SET_COHERENT_MASK
  456. select CLKSRC_MMIO
  457. select CPU_XSCALE
  458. select ARCH_REQUIRE_GPIOLIB
  459. select GENERIC_CLOCKEVENTS
  460. select MIGHT_HAVE_PCI
  461. select NEED_MACH_IO_H
  462. select DMABOUNCE if PCI
  463. help
  464. Support for Intel's IXP4XX (XScale) family of processors.
  465. config ARCH_DOVE
  466. bool "Marvell Dove"
  467. select CPU_V7
  468. select PCI
  469. select ARCH_REQUIRE_GPIOLIB
  470. select GENERIC_CLOCKEVENTS
  471. select NEED_MACH_IO_H
  472. select PLAT_ORION
  473. help
  474. Support for the Marvell Dove SoC 88AP510
  475. config ARCH_KIRKWOOD
  476. bool "Marvell Kirkwood"
  477. select CPU_FEROCEON
  478. select PCI
  479. select ARCH_REQUIRE_GPIOLIB
  480. select GENERIC_CLOCKEVENTS
  481. select NEED_MACH_IO_H
  482. select PLAT_ORION
  483. help
  484. Support for the following Marvell Kirkwood series SoCs:
  485. 88F6180, 88F6192 and 88F6281.
  486. config ARCH_LPC32XX
  487. bool "NXP LPC32XX"
  488. select CLKSRC_MMIO
  489. select CPU_ARM926T
  490. select ARCH_REQUIRE_GPIOLIB
  491. select HAVE_IDE
  492. select ARM_AMBA
  493. select USB_ARCH_HAS_OHCI
  494. select CLKDEV_LOOKUP
  495. select GENERIC_CLOCKEVENTS
  496. select USE_OF
  497. help
  498. Support for the NXP LPC32XX family of processors
  499. config ARCH_MV78XX0
  500. bool "Marvell MV78xx0"
  501. select CPU_FEROCEON
  502. select PCI
  503. select ARCH_REQUIRE_GPIOLIB
  504. select GENERIC_CLOCKEVENTS
  505. select NEED_MACH_IO_H
  506. select PLAT_ORION
  507. help
  508. Support for the following Marvell MV78xx0 series SoCs:
  509. MV781x0, MV782x0.
  510. config ARCH_ORION5X
  511. bool "Marvell Orion"
  512. depends on MMU
  513. select CPU_FEROCEON
  514. select PCI
  515. select ARCH_REQUIRE_GPIOLIB
  516. select GENERIC_CLOCKEVENTS
  517. select NEED_MACH_IO_H
  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 IRQ_DOMAIN
  531. select PLAT_PXA
  532. select SPARSE_IRQ
  533. select GENERIC_ALLOCATOR
  534. help
  535. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  536. config ARCH_KS8695
  537. bool "Micrel/Kendin KS8695"
  538. select CPU_ARM922T
  539. select ARCH_REQUIRE_GPIOLIB
  540. select ARCH_USES_GETTIMEOFFSET
  541. select NEED_MACH_MEMORY_H
  542. help
  543. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  544. System-on-Chip devices.
  545. config ARCH_W90X900
  546. bool "Nuvoton W90X900 CPU"
  547. select CPU_ARM926T
  548. select ARCH_REQUIRE_GPIOLIB
  549. select CLKDEV_LOOKUP
  550. select CLKSRC_MMIO
  551. select GENERIC_CLOCKEVENTS
  552. help
  553. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  554. At present, the w90x900 has been renamed nuc900, regarding
  555. the ARM series product line, you can login the following
  556. link address to know more.
  557. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  558. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  559. config ARCH_TEGRA
  560. bool "NVIDIA Tegra"
  561. select CLKDEV_LOOKUP
  562. select CLKSRC_MMIO
  563. select GENERIC_CLOCKEVENTS
  564. select GENERIC_GPIO
  565. select HAVE_CLK
  566. select HAVE_SMP
  567. select MIGHT_HAVE_CACHE_L2X0
  568. select NEED_MACH_IO_H if PCI
  569. select ARCH_HAS_CPUFREQ
  570. help
  571. This enables support for NVIDIA Tegra based systems (Tegra APX,
  572. Tegra 6xx and Tegra 2 series).
  573. config ARCH_PICOXCELL
  574. bool "Picochip picoXcell"
  575. select ARCH_REQUIRE_GPIOLIB
  576. select ARM_PATCH_PHYS_VIRT
  577. select ARM_VIC
  578. select CPU_V6K
  579. select DW_APB_TIMER
  580. select DW_APB_TIMER_OF
  581. select GENERIC_CLOCKEVENTS
  582. select GENERIC_GPIO
  583. select HAVE_TCM
  584. select NO_IOPORT
  585. select SPARSE_IRQ
  586. select USE_OF
  587. help
  588. This enables support for systems based on the Picochip picoXcell
  589. family of Femtocell devices. The picoxcell support requires device tree
  590. for all boards.
  591. config ARCH_PNX4008
  592. bool "Philips Nexperia PNX4008 Mobile"
  593. select CPU_ARM926T
  594. select CLKDEV_LOOKUP
  595. select ARCH_USES_GETTIMEOFFSET
  596. help
  597. This enables support for Philips PNX4008 mobile platform.
  598. config ARCH_PXA
  599. bool "PXA2xx/PXA3xx-based"
  600. depends on MMU
  601. select ARCH_MTD_XIP
  602. select ARCH_HAS_CPUFREQ
  603. select CLKDEV_LOOKUP
  604. select CLKSRC_MMIO
  605. select ARCH_REQUIRE_GPIOLIB
  606. select GENERIC_CLOCKEVENTS
  607. select GPIO_PXA
  608. select PLAT_PXA
  609. select SPARSE_IRQ
  610. select AUTO_ZRELADDR
  611. select MULTI_IRQ_HANDLER
  612. select ARM_CPU_SUSPEND if PM
  613. select HAVE_IDE
  614. help
  615. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  616. config ARCH_MSM
  617. bool "Qualcomm MSM"
  618. select HAVE_CLK
  619. select GENERIC_CLOCKEVENTS
  620. select ARCH_REQUIRE_GPIOLIB
  621. select CLKDEV_LOOKUP
  622. help
  623. Support for Qualcomm MSM/QSD based systems. This runs on the
  624. apps processor of the MSM/QSD and depends on a shared memory
  625. interface to the modem processor which runs the baseband
  626. stack and controls some vital subsystems
  627. (clock and power control, etc).
  628. config ARCH_SHMOBILE
  629. bool "Renesas SH-Mobile / R-Mobile"
  630. select HAVE_CLK
  631. select CLKDEV_LOOKUP
  632. select HAVE_MACH_CLKDEV
  633. select HAVE_SMP
  634. select GENERIC_CLOCKEVENTS
  635. select MIGHT_HAVE_CACHE_L2X0
  636. select NO_IOPORT
  637. select SPARSE_IRQ
  638. select MULTI_IRQ_HANDLER
  639. select PM_GENERIC_DOMAINS if PM
  640. select NEED_MACH_MEMORY_H
  641. help
  642. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  643. config ARCH_RPC
  644. bool "RiscPC"
  645. select ARCH_ACORN
  646. select FIQ
  647. select ARCH_MAY_HAVE_PC_FDC
  648. select HAVE_PATA_PLATFORM
  649. select ISA_DMA_API
  650. select NO_IOPORT
  651. select ARCH_SPARSEMEM_ENABLE
  652. select ARCH_USES_GETTIMEOFFSET
  653. select HAVE_IDE
  654. select NEED_MACH_IO_H
  655. select NEED_MACH_MEMORY_H
  656. help
  657. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  658. CD-ROM interface, serial and parallel port, and the floppy drive.
  659. config ARCH_SA1100
  660. bool "SA1100-based"
  661. select CLKSRC_MMIO
  662. select CPU_SA1100
  663. select ISA
  664. select ARCH_SPARSEMEM_ENABLE
  665. select ARCH_MTD_XIP
  666. select ARCH_HAS_CPUFREQ
  667. select CPU_FREQ
  668. select GENERIC_CLOCKEVENTS
  669. select CLKDEV_LOOKUP
  670. select ARCH_REQUIRE_GPIOLIB
  671. select HAVE_IDE
  672. select NEED_MACH_MEMORY_H
  673. select SPARSE_IRQ
  674. help
  675. Support for StrongARM 11x0 based boards.
  676. config ARCH_S3C24XX
  677. bool "Samsung S3C24XX SoCs"
  678. select GENERIC_GPIO
  679. select ARCH_HAS_CPUFREQ
  680. select HAVE_CLK
  681. select CLKDEV_LOOKUP
  682. select ARCH_USES_GETTIMEOFFSET
  683. select HAVE_S3C2410_I2C if I2C
  684. select HAVE_S3C_RTC if RTC_CLASS
  685. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  686. select NEED_MACH_IO_H
  687. help
  688. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  689. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  690. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  691. Samsung SMDK2410 development board (and derivatives).
  692. config ARCH_S3C64XX
  693. bool "Samsung S3C64XX"
  694. select PLAT_SAMSUNG
  695. select CPU_V6
  696. select ARM_VIC
  697. select HAVE_CLK
  698. select HAVE_TCM
  699. select CLKDEV_LOOKUP
  700. select NO_IOPORT
  701. select ARCH_USES_GETTIMEOFFSET
  702. select ARCH_HAS_CPUFREQ
  703. select ARCH_REQUIRE_GPIOLIB
  704. select SAMSUNG_CLKSRC
  705. select SAMSUNG_IRQ_VIC_TIMER
  706. select S3C_GPIO_TRACK
  707. select S3C_DEV_NAND
  708. select USB_ARCH_HAS_OHCI
  709. select SAMSUNG_GPIOLIB_4BIT
  710. select HAVE_S3C2410_I2C if I2C
  711. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  712. help
  713. Samsung S3C64XX series based systems
  714. config ARCH_S5P64X0
  715. bool "Samsung S5P6440 S5P6450"
  716. select CPU_V6
  717. select GENERIC_GPIO
  718. select HAVE_CLK
  719. select CLKDEV_LOOKUP
  720. select CLKSRC_MMIO
  721. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  722. select GENERIC_CLOCKEVENTS
  723. select HAVE_S3C2410_I2C if I2C
  724. select HAVE_S3C_RTC if RTC_CLASS
  725. help
  726. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  727. SMDK6450.
  728. config ARCH_S5PC100
  729. bool "Samsung S5PC100"
  730. select GENERIC_GPIO
  731. select HAVE_CLK
  732. select CLKDEV_LOOKUP
  733. select CPU_V7
  734. select ARCH_USES_GETTIMEOFFSET
  735. select HAVE_S3C2410_I2C if I2C
  736. select HAVE_S3C_RTC if RTC_CLASS
  737. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  738. help
  739. Samsung S5PC100 series based systems
  740. config ARCH_S5PV210
  741. bool "Samsung S5PV210/S5PC110"
  742. select CPU_V7
  743. select ARCH_SPARSEMEM_ENABLE
  744. select ARCH_HAS_HOLES_MEMORYMODEL
  745. select GENERIC_GPIO
  746. select HAVE_CLK
  747. select CLKDEV_LOOKUP
  748. select CLKSRC_MMIO
  749. select ARCH_HAS_CPUFREQ
  750. select GENERIC_CLOCKEVENTS
  751. select HAVE_S3C2410_I2C if I2C
  752. select HAVE_S3C_RTC if RTC_CLASS
  753. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  754. select NEED_MACH_MEMORY_H
  755. help
  756. Samsung S5PV210/S5PC110 series based systems
  757. config ARCH_EXYNOS
  758. bool "SAMSUNG EXYNOS"
  759. select CPU_V7
  760. select ARCH_SPARSEMEM_ENABLE
  761. select ARCH_HAS_HOLES_MEMORYMODEL
  762. select GENERIC_GPIO
  763. select HAVE_CLK
  764. select CLKDEV_LOOKUP
  765. select ARCH_HAS_CPUFREQ
  766. select GENERIC_CLOCKEVENTS
  767. select HAVE_S3C_RTC if RTC_CLASS
  768. select HAVE_S3C2410_I2C if I2C
  769. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  770. select NEED_MACH_MEMORY_H
  771. help
  772. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  773. config ARCH_SHARK
  774. bool "Shark"
  775. select CPU_SA110
  776. select ISA
  777. select ISA_DMA
  778. select ZONE_DMA
  779. select PCI
  780. select ARCH_USES_GETTIMEOFFSET
  781. select NEED_MACH_MEMORY_H
  782. select NEED_MACH_IO_H
  783. help
  784. Support for the StrongARM based Digital DNARD machine, also known
  785. as "Shark" (<http://www.shark-linux.de/shark.html>).
  786. config ARCH_U300
  787. bool "ST-Ericsson U300 Series"
  788. depends on MMU
  789. select CLKSRC_MMIO
  790. select CPU_ARM926T
  791. select HAVE_TCM
  792. select ARM_AMBA
  793. select ARM_PATCH_PHYS_VIRT
  794. select ARM_VIC
  795. select GENERIC_CLOCKEVENTS
  796. select CLKDEV_LOOKUP
  797. select HAVE_MACH_CLKDEV
  798. select GENERIC_GPIO
  799. select ARCH_REQUIRE_GPIOLIB
  800. help
  801. Support for ST-Ericsson U300 series mobile platforms.
  802. config ARCH_U8500
  803. bool "ST-Ericsson U8500 Series"
  804. depends on MMU
  805. select CPU_V7
  806. select ARM_AMBA
  807. select GENERIC_CLOCKEVENTS
  808. select CLKDEV_LOOKUP
  809. select ARCH_REQUIRE_GPIOLIB
  810. select ARCH_HAS_CPUFREQ
  811. select HAVE_SMP
  812. select MIGHT_HAVE_CACHE_L2X0
  813. help
  814. Support for ST-Ericsson's Ux500 architecture
  815. config ARCH_NOMADIK
  816. bool "STMicroelectronics Nomadik"
  817. select ARM_AMBA
  818. select ARM_VIC
  819. select CPU_ARM926T
  820. select CLKDEV_LOOKUP
  821. select GENERIC_CLOCKEVENTS
  822. select PINCTRL
  823. select MIGHT_HAVE_CACHE_L2X0
  824. select ARCH_REQUIRE_GPIOLIB
  825. help
  826. Support for the Nomadik platform by ST-Ericsson
  827. config ARCH_DAVINCI
  828. bool "TI DaVinci"
  829. select GENERIC_CLOCKEVENTS
  830. select ARCH_REQUIRE_GPIOLIB
  831. select ZONE_DMA
  832. select HAVE_IDE
  833. select CLKDEV_LOOKUP
  834. select GENERIC_ALLOCATOR
  835. select GENERIC_IRQ_CHIP
  836. select ARCH_HAS_HOLES_MEMORYMODEL
  837. help
  838. Support for TI's DaVinci platform.
  839. config ARCH_OMAP
  840. bool "TI OMAP"
  841. select HAVE_CLK
  842. select ARCH_REQUIRE_GPIOLIB
  843. select ARCH_HAS_CPUFREQ
  844. select CLKSRC_MMIO
  845. select GENERIC_CLOCKEVENTS
  846. select ARCH_HAS_HOLES_MEMORYMODEL
  847. help
  848. Support for TI's OMAP platform (OMAP1/2/3/4).
  849. config PLAT_SPEAR
  850. bool "ST SPEAr"
  851. select ARM_AMBA
  852. select ARCH_REQUIRE_GPIOLIB
  853. select CLKDEV_LOOKUP
  854. select COMMON_CLK
  855. select CLKSRC_MMIO
  856. select GENERIC_CLOCKEVENTS
  857. select HAVE_CLK
  858. help
  859. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  860. config ARCH_VT8500
  861. bool "VIA/WonderMedia 85xx"
  862. select CPU_ARM926T
  863. select GENERIC_GPIO
  864. select ARCH_HAS_CPUFREQ
  865. select GENERIC_CLOCKEVENTS
  866. select ARCH_REQUIRE_GPIOLIB
  867. select HAVE_PWM
  868. help
  869. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  870. config ARCH_ZYNQ
  871. bool "Xilinx Zynq ARM Cortex A9 Platform"
  872. select CPU_V7
  873. select GENERIC_CLOCKEVENTS
  874. select CLKDEV_LOOKUP
  875. select ARM_GIC
  876. select ARM_AMBA
  877. select ICST
  878. select MIGHT_HAVE_CACHE_L2X0
  879. select USE_OF
  880. help
  881. Support for Xilinx Zynq ARM Cortex A9 Platform
  882. endchoice
  883. #
  884. # This is sorted alphabetically by mach-* pathname. However, plat-*
  885. # Kconfigs may be included either alphabetically (according to the
  886. # plat- suffix) or along side the corresponding mach-* source.
  887. #
  888. source "arch/arm/mach-at91/Kconfig"
  889. source "arch/arm/mach-bcmring/Kconfig"
  890. source "arch/arm/mach-clps711x/Kconfig"
  891. source "arch/arm/mach-cns3xxx/Kconfig"
  892. source "arch/arm/mach-davinci/Kconfig"
  893. source "arch/arm/mach-dove/Kconfig"
  894. source "arch/arm/mach-ep93xx/Kconfig"
  895. source "arch/arm/mach-footbridge/Kconfig"
  896. source "arch/arm/mach-gemini/Kconfig"
  897. source "arch/arm/mach-h720x/Kconfig"
  898. source "arch/arm/mach-integrator/Kconfig"
  899. source "arch/arm/mach-iop32x/Kconfig"
  900. source "arch/arm/mach-iop33x/Kconfig"
  901. source "arch/arm/mach-iop13xx/Kconfig"
  902. source "arch/arm/mach-ixp4xx/Kconfig"
  903. source "arch/arm/mach-kirkwood/Kconfig"
  904. source "arch/arm/mach-ks8695/Kconfig"
  905. source "arch/arm/mach-lpc32xx/Kconfig"
  906. source "arch/arm/mach-msm/Kconfig"
  907. source "arch/arm/mach-mv78xx0/Kconfig"
  908. source "arch/arm/plat-mxc/Kconfig"
  909. source "arch/arm/mach-mxs/Kconfig"
  910. source "arch/arm/mach-netx/Kconfig"
  911. source "arch/arm/mach-nomadik/Kconfig"
  912. source "arch/arm/plat-nomadik/Kconfig"
  913. source "arch/arm/plat-omap/Kconfig"
  914. source "arch/arm/mach-omap1/Kconfig"
  915. source "arch/arm/mach-omap2/Kconfig"
  916. source "arch/arm/mach-orion5x/Kconfig"
  917. source "arch/arm/mach-pxa/Kconfig"
  918. source "arch/arm/plat-pxa/Kconfig"
  919. source "arch/arm/mach-mmp/Kconfig"
  920. source "arch/arm/mach-realview/Kconfig"
  921. source "arch/arm/mach-sa1100/Kconfig"
  922. source "arch/arm/plat-samsung/Kconfig"
  923. source "arch/arm/plat-s3c24xx/Kconfig"
  924. source "arch/arm/plat-spear/Kconfig"
  925. source "arch/arm/mach-s3c24xx/Kconfig"
  926. if ARCH_S3C24XX
  927. source "arch/arm/mach-s3c2412/Kconfig"
  928. source "arch/arm/mach-s3c2440/Kconfig"
  929. endif
  930. if ARCH_S3C64XX
  931. source "arch/arm/mach-s3c64xx/Kconfig"
  932. endif
  933. source "arch/arm/mach-s5p64x0/Kconfig"
  934. source "arch/arm/mach-s5pc100/Kconfig"
  935. source "arch/arm/mach-s5pv210/Kconfig"
  936. source "arch/arm/mach-exynos/Kconfig"
  937. source "arch/arm/mach-shmobile/Kconfig"
  938. source "arch/arm/mach-tegra/Kconfig"
  939. source "arch/arm/mach-u300/Kconfig"
  940. source "arch/arm/mach-ux500/Kconfig"
  941. source "arch/arm/mach-versatile/Kconfig"
  942. source "arch/arm/mach-vexpress/Kconfig"
  943. source "arch/arm/plat-versatile/Kconfig"
  944. source "arch/arm/mach-vt8500/Kconfig"
  945. source "arch/arm/mach-w90x900/Kconfig"
  946. # Definitions to make life easier
  947. config ARCH_ACORN
  948. bool
  949. config PLAT_IOP
  950. bool
  951. select GENERIC_CLOCKEVENTS
  952. config PLAT_ORION
  953. bool
  954. select CLKSRC_MMIO
  955. select GENERIC_IRQ_CHIP
  956. select COMMON_CLK
  957. config PLAT_PXA
  958. bool
  959. config PLAT_VERSATILE
  960. bool
  961. config ARM_TIMER_SP804
  962. bool
  963. select CLKSRC_MMIO
  964. select HAVE_SCHED_CLOCK
  965. source arch/arm/mm/Kconfig
  966. config ARM_NR_BANKS
  967. int
  968. default 16 if ARCH_EP93XX
  969. default 8
  970. config IWMMXT
  971. bool "Enable iWMMXt support"
  972. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  973. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  974. help
  975. Enable support for iWMMXt context switching at run time if
  976. running on a CPU that supports it.
  977. config XSCALE_PMU
  978. bool
  979. depends on CPU_XSCALE
  980. default y
  981. config CPU_HAS_PMU
  982. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  983. (!ARCH_OMAP3 || OMAP3_EMU)
  984. default y
  985. bool
  986. config MULTI_IRQ_HANDLER
  987. bool
  988. help
  989. Allow each machine to specify it's own IRQ handler at run time.
  990. if !MMU
  991. source "arch/arm/Kconfig-nommu"
  992. endif
  993. config ARM_ERRATA_326103
  994. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  995. depends on CPU_V6
  996. help
  997. Executing a SWP instruction to read-only memory does not set bit 11
  998. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  999. treat the access as a read, preventing a COW from occurring and
  1000. causing the faulting task to livelock.
  1001. config ARM_ERRATA_411920
  1002. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1003. depends on CPU_V6 || CPU_V6K
  1004. help
  1005. Invalidation of the Instruction Cache operation can
  1006. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1007. It does not affect the MPCore. This option enables the ARM Ltd.
  1008. recommended workaround.
  1009. config ARM_ERRATA_430973
  1010. bool "ARM errata: Stale prediction on replaced interworking branch"
  1011. depends on CPU_V7
  1012. help
  1013. This option enables the workaround for the 430973 Cortex-A8
  1014. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1015. interworking branch is replaced with another code sequence at the
  1016. same virtual address, whether due to self-modifying code or virtual
  1017. to physical address re-mapping, Cortex-A8 does not recover from the
  1018. stale interworking branch prediction. This results in Cortex-A8
  1019. executing the new code sequence in the incorrect ARM or Thumb state.
  1020. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1021. and also flushes the branch target cache at every context switch.
  1022. Note that setting specific bits in the ACTLR register may not be
  1023. available in non-secure mode.
  1024. config ARM_ERRATA_458693
  1025. bool "ARM errata: Processor deadlock when a false hazard is created"
  1026. depends on CPU_V7
  1027. help
  1028. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1029. erratum. For very specific sequences of memory operations, it is
  1030. possible for a hazard condition intended for a cache line to instead
  1031. be incorrectly associated with a different cache line. This false
  1032. hazard might then cause a processor deadlock. The workaround enables
  1033. the L1 caching of the NEON accesses and disables the PLD instruction
  1034. in the ACTLR register. Note that setting specific bits in the ACTLR
  1035. register may not be available in non-secure mode.
  1036. config ARM_ERRATA_460075
  1037. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1038. depends on CPU_V7
  1039. help
  1040. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1041. erratum. Any asynchronous access to the L2 cache may encounter a
  1042. situation in which recent store transactions to the L2 cache are lost
  1043. and overwritten with stale memory contents from external memory. The
  1044. workaround disables the write-allocate mode for the L2 cache via the
  1045. ACTLR register. Note that setting specific bits in the ACTLR register
  1046. may not be available in non-secure mode.
  1047. config ARM_ERRATA_742230
  1048. bool "ARM errata: DMB operation may be faulty"
  1049. depends on CPU_V7 && SMP
  1050. help
  1051. This option enables the workaround for the 742230 Cortex-A9
  1052. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1053. between two write operations may not ensure the correct visibility
  1054. ordering of the two writes. This workaround sets a specific bit in
  1055. the diagnostic register of the Cortex-A9 which causes the DMB
  1056. instruction to behave as a DSB, ensuring the correct behaviour of
  1057. the two writes.
  1058. config ARM_ERRATA_742231
  1059. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1060. depends on CPU_V7 && SMP
  1061. help
  1062. This option enables the workaround for the 742231 Cortex-A9
  1063. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1064. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1065. accessing some data located in the same cache line, may get corrupted
  1066. data due to bad handling of the address hazard when the line gets
  1067. replaced from one of the CPUs at the same time as another CPU is
  1068. accessing it. This workaround sets specific bits in the diagnostic
  1069. register of the Cortex-A9 which reduces the linefill issuing
  1070. capabilities of the processor.
  1071. config PL310_ERRATA_588369
  1072. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1073. depends on CACHE_L2X0
  1074. help
  1075. The PL310 L2 cache controller implements three types of Clean &
  1076. Invalidate maintenance operations: by Physical Address
  1077. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1078. They are architecturally defined to behave as the execution of a
  1079. clean operation followed immediately by an invalidate operation,
  1080. both performing to the same memory location. This functionality
  1081. is not correctly implemented in PL310 as clean lines are not
  1082. invalidated as a result of these operations.
  1083. config ARM_ERRATA_720789
  1084. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1085. depends on CPU_V7
  1086. help
  1087. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1088. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1089. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1090. As a consequence of this erratum, some TLB entries which should be
  1091. invalidated are not, resulting in an incoherency in the system page
  1092. tables. The workaround changes the TLB flushing routines to invalidate
  1093. entries regardless of the ASID.
  1094. config PL310_ERRATA_727915
  1095. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1096. depends on CACHE_L2X0
  1097. help
  1098. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1099. operation (offset 0x7FC). This operation runs in background so that
  1100. PL310 can handle normal accesses while it is in progress. Under very
  1101. rare circumstances, due to this erratum, write data can be lost when
  1102. PL310 treats a cacheable write transaction during a Clean &
  1103. Invalidate by Way operation.
  1104. config ARM_ERRATA_743622
  1105. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1106. depends on CPU_V7
  1107. help
  1108. This option enables the workaround for the 743622 Cortex-A9
  1109. (r2p*) erratum. Under very rare conditions, a faulty
  1110. optimisation in the Cortex-A9 Store Buffer may lead to data
  1111. corruption. This workaround sets a specific bit in the diagnostic
  1112. register of the Cortex-A9 which disables the Store Buffer
  1113. optimisation, preventing the defect from occurring. This has no
  1114. visible impact on the overall performance or power consumption of the
  1115. processor.
  1116. config ARM_ERRATA_751472
  1117. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1118. depends on CPU_V7
  1119. help
  1120. This option enables the workaround for the 751472 Cortex-A9 (prior
  1121. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1122. completion of a following broadcasted operation if the second
  1123. operation is received by a CPU before the ICIALLUIS has completed,
  1124. potentially leading to corrupted entries in the cache or TLB.
  1125. config PL310_ERRATA_753970
  1126. bool "PL310 errata: cache sync operation may be faulty"
  1127. depends on CACHE_PL310
  1128. help
  1129. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1130. Under some condition the effect of cache sync operation on
  1131. the store buffer still remains when the operation completes.
  1132. This means that the store buffer is always asked to drain and
  1133. this prevents it from merging any further writes. The workaround
  1134. is to replace the normal offset of cache sync operation (0x730)
  1135. by another offset targeting an unmapped PL310 register 0x740.
  1136. This has the same effect as the cache sync operation: store buffer
  1137. drain and waiting for all buffers empty.
  1138. config ARM_ERRATA_754322
  1139. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1140. depends on CPU_V7
  1141. help
  1142. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1143. r3p*) erratum. A speculative memory access may cause a page table walk
  1144. which starts prior to an ASID switch but completes afterwards. This
  1145. can populate the micro-TLB with a stale entry which may be hit with
  1146. the new ASID. This workaround places two dsb instructions in the mm
  1147. switching code so that no page table walks can cross the ASID switch.
  1148. config ARM_ERRATA_754327
  1149. bool "ARM errata: no automatic Store Buffer drain"
  1150. depends on CPU_V7 && SMP
  1151. help
  1152. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1153. r2p0) erratum. The Store Buffer does not have any automatic draining
  1154. mechanism and therefore a livelock may occur if an external agent
  1155. continuously polls a memory location waiting to observe an update.
  1156. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1157. written polling loops from denying visibility of updates to memory.
  1158. config ARM_ERRATA_364296
  1159. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1160. depends on CPU_V6 && !SMP
  1161. help
  1162. This options enables the workaround for the 364296 ARM1136
  1163. r0p2 erratum (possible cache data corruption with
  1164. hit-under-miss enabled). It sets the undocumented bit 31 in
  1165. the auxiliary control register and the FI bit in the control
  1166. register, thus disabling hit-under-miss without putting the
  1167. processor into full low interrupt latency mode. ARM11MPCore
  1168. is not affected.
  1169. config ARM_ERRATA_764369
  1170. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1171. depends on CPU_V7 && SMP
  1172. help
  1173. This option enables the workaround for erratum 764369
  1174. affecting Cortex-A9 MPCore with two or more processors (all
  1175. current revisions). Under certain timing circumstances, a data
  1176. cache line maintenance operation by MVA targeting an Inner
  1177. Shareable memory region may fail to proceed up to either the
  1178. Point of Coherency or to the Point of Unification of the
  1179. system. This workaround adds a DSB instruction before the
  1180. relevant cache maintenance functions and sets a specific bit
  1181. in the diagnostic control register of the SCU.
  1182. config PL310_ERRATA_769419
  1183. bool "PL310 errata: no automatic Store Buffer drain"
  1184. depends on CACHE_L2X0
  1185. help
  1186. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1187. not automatically drain. This can cause normal, non-cacheable
  1188. writes to be retained when the memory system is idle, leading
  1189. to suboptimal I/O performance for drivers using coherent DMA.
  1190. This option adds a write barrier to the cpu_idle loop so that,
  1191. on systems with an outer cache, the store buffer is drained
  1192. explicitly.
  1193. endmenu
  1194. source "arch/arm/common/Kconfig"
  1195. menu "Bus support"
  1196. config ARM_AMBA
  1197. bool
  1198. config ISA
  1199. bool
  1200. help
  1201. Find out whether you have ISA slots on your motherboard. ISA is the
  1202. name of a bus system, i.e. the way the CPU talks to the other stuff
  1203. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1204. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1205. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1206. # Select ISA DMA controller support
  1207. config ISA_DMA
  1208. bool
  1209. select ISA_DMA_API
  1210. # Select ISA DMA interface
  1211. config ISA_DMA_API
  1212. bool
  1213. config PCI
  1214. bool "PCI support" if MIGHT_HAVE_PCI
  1215. help
  1216. Find out whether you have a PCI motherboard. PCI is the name of a
  1217. bus system, i.e. the way the CPU talks to the other stuff inside
  1218. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1219. VESA. If you have PCI, say Y, otherwise N.
  1220. config PCI_DOMAINS
  1221. bool
  1222. depends on PCI
  1223. config PCI_NANOENGINE
  1224. bool "BSE nanoEngine PCI support"
  1225. depends on SA1100_NANOENGINE
  1226. help
  1227. Enable PCI on the BSE nanoEngine board.
  1228. config PCI_SYSCALL
  1229. def_bool PCI
  1230. # Select the host bridge type
  1231. config PCI_HOST_VIA82C505
  1232. bool
  1233. depends on PCI && ARCH_SHARK
  1234. default y
  1235. config PCI_HOST_ITE8152
  1236. bool
  1237. depends on PCI && MACH_ARMCORE
  1238. default y
  1239. select DMABOUNCE
  1240. source "drivers/pci/Kconfig"
  1241. source "drivers/pcmcia/Kconfig"
  1242. endmenu
  1243. menu "Kernel Features"
  1244. config HAVE_SMP
  1245. bool
  1246. help
  1247. This option should be selected by machines which have an SMP-
  1248. capable CPU.
  1249. The only effect of this option is to make the SMP-related
  1250. options available to the user for configuration.
  1251. config SMP
  1252. bool "Symmetric Multi-Processing"
  1253. depends on CPU_V6K || CPU_V7
  1254. depends on GENERIC_CLOCKEVENTS
  1255. depends on HAVE_SMP
  1256. depends on MMU
  1257. select USE_GENERIC_SMP_HELPERS
  1258. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1259. help
  1260. This enables support for systems with more than one CPU. If you have
  1261. a system with only one CPU, like most personal computers, say N. If
  1262. you have a system with more than one CPU, say Y.
  1263. If you say N here, the kernel will run on single and multiprocessor
  1264. machines, but will use only one CPU of a multiprocessor machine. If
  1265. you say Y here, the kernel will run on many, but not all, single
  1266. processor machines. On a single processor machine, the kernel will
  1267. run faster if you say N here.
  1268. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1269. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1270. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1271. If you don't know what to do here, say N.
  1272. config SMP_ON_UP
  1273. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1274. depends on EXPERIMENTAL
  1275. depends on SMP && !XIP_KERNEL
  1276. default y
  1277. help
  1278. SMP kernels contain instructions which fail on non-SMP processors.
  1279. Enabling this option allows the kernel to modify itself to make
  1280. these instructions safe. Disabling it allows about 1K of space
  1281. savings.
  1282. If you don't know what to do here, say Y.
  1283. config ARM_CPU_TOPOLOGY
  1284. bool "Support cpu topology definition"
  1285. depends on SMP && CPU_V7
  1286. default y
  1287. help
  1288. Support ARM cpu topology definition. The MPIDR register defines
  1289. affinity between processors which is then used to describe the cpu
  1290. topology of an ARM System.
  1291. config SCHED_MC
  1292. bool "Multi-core scheduler support"
  1293. depends on ARM_CPU_TOPOLOGY
  1294. help
  1295. Multi-core scheduler support improves the CPU scheduler's decision
  1296. making when dealing with multi-core CPU chips at a cost of slightly
  1297. increased overhead in some places. If unsure say N here.
  1298. config SCHED_SMT
  1299. bool "SMT scheduler support"
  1300. depends on ARM_CPU_TOPOLOGY
  1301. help
  1302. Improves the CPU scheduler's decision making when dealing with
  1303. MultiThreading at a cost of slightly increased overhead in some
  1304. places. If unsure say N here.
  1305. config HAVE_ARM_SCU
  1306. bool
  1307. help
  1308. This option enables support for the ARM system coherency unit
  1309. config ARM_ARCH_TIMER
  1310. bool "Architected timer support"
  1311. depends on CPU_V7
  1312. help
  1313. This option enables support for the ARM architected timer
  1314. config HAVE_ARM_TWD
  1315. bool
  1316. depends on SMP
  1317. help
  1318. This options enables support for the ARM timer and watchdog unit
  1319. choice
  1320. prompt "Memory split"
  1321. default VMSPLIT_3G
  1322. help
  1323. Select the desired split between kernel and user memory.
  1324. If you are not absolutely sure what you are doing, leave this
  1325. option alone!
  1326. config VMSPLIT_3G
  1327. bool "3G/1G user/kernel split"
  1328. config VMSPLIT_2G
  1329. bool "2G/2G user/kernel split"
  1330. config VMSPLIT_1G
  1331. bool "1G/3G user/kernel split"
  1332. endchoice
  1333. config PAGE_OFFSET
  1334. hex
  1335. default 0x40000000 if VMSPLIT_1G
  1336. default 0x80000000 if VMSPLIT_2G
  1337. default 0xC0000000
  1338. config NR_CPUS
  1339. int "Maximum number of CPUs (2-32)"
  1340. range 2 32
  1341. depends on SMP
  1342. default "4"
  1343. config HOTPLUG_CPU
  1344. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1345. depends on SMP && HOTPLUG && EXPERIMENTAL
  1346. help
  1347. Say Y here to experiment with turning CPUs off and on. CPUs
  1348. can be controlled through /sys/devices/system/cpu.
  1349. config LOCAL_TIMERS
  1350. bool "Use local timer interrupts"
  1351. depends on SMP
  1352. default y
  1353. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1354. help
  1355. Enable support for local timers on SMP platforms, rather then the
  1356. legacy IPI broadcast method. Local timers allows the system
  1357. accounting to be spread across the timer interval, preventing a
  1358. "thundering herd" at every timer tick.
  1359. config ARCH_NR_GPIO
  1360. int
  1361. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1362. default 355 if ARCH_U8500
  1363. default 264 if MACH_H4700
  1364. default 0
  1365. help
  1366. Maximum number of GPIOs in the system.
  1367. If unsure, leave the default value.
  1368. source kernel/Kconfig.preempt
  1369. config HZ
  1370. int
  1371. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1372. ARCH_S5PV210 || ARCH_EXYNOS4
  1373. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1374. default AT91_TIMER_HZ if ARCH_AT91
  1375. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1376. default 100
  1377. config THUMB2_KERNEL
  1378. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1379. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1380. select AEABI
  1381. select ARM_ASM_UNIFIED
  1382. select ARM_UNWIND
  1383. help
  1384. By enabling this option, the kernel will be compiled in
  1385. Thumb-2 mode. A compiler/assembler that understand the unified
  1386. ARM-Thumb syntax is needed.
  1387. If unsure, say N.
  1388. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1389. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1390. depends on THUMB2_KERNEL && MODULES
  1391. default y
  1392. help
  1393. Various binutils versions can resolve Thumb-2 branches to
  1394. locally-defined, preemptible global symbols as short-range "b.n"
  1395. branch instructions.
  1396. This is a problem, because there's no guarantee the final
  1397. destination of the symbol, or any candidate locations for a
  1398. trampoline, are within range of the branch. For this reason, the
  1399. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1400. relocation in modules at all, and it makes little sense to add
  1401. support.
  1402. The symptom is that the kernel fails with an "unsupported
  1403. relocation" error when loading some modules.
  1404. Until fixed tools are available, passing
  1405. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1406. code which hits this problem, at the cost of a bit of extra runtime
  1407. stack usage in some cases.
  1408. The problem is described in more detail at:
  1409. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1410. Only Thumb-2 kernels are affected.
  1411. Unless you are sure your tools don't have this problem, say Y.
  1412. config ARM_ASM_UNIFIED
  1413. bool
  1414. config AEABI
  1415. bool "Use the ARM EABI to compile the kernel"
  1416. help
  1417. This option allows for the kernel to be compiled using the latest
  1418. ARM ABI (aka EABI). This is only useful if you are using a user
  1419. space environment that is also compiled with EABI.
  1420. Since there are major incompatibilities between the legacy ABI and
  1421. EABI, especially with regard to structure member alignment, this
  1422. option also changes the kernel syscall calling convention to
  1423. disambiguate both ABIs and allow for backward compatibility support
  1424. (selected with CONFIG_OABI_COMPAT).
  1425. To use this you need GCC version 4.0.0 or later.
  1426. config OABI_COMPAT
  1427. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1428. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1429. default y
  1430. help
  1431. This option preserves the old syscall interface along with the
  1432. new (ARM EABI) one. It also provides a compatibility layer to
  1433. intercept syscalls that have structure arguments which layout
  1434. in memory differs between the legacy ABI and the new ARM EABI
  1435. (only for non "thumb" binaries). This option adds a tiny
  1436. overhead to all syscalls and produces a slightly larger kernel.
  1437. If you know you'll be using only pure EABI user space then you
  1438. can say N here. If this option is not selected and you attempt
  1439. to execute a legacy ABI binary then the result will be
  1440. UNPREDICTABLE (in fact it can be predicted that it won't work
  1441. at all). If in doubt say Y.
  1442. config ARCH_HAS_HOLES_MEMORYMODEL
  1443. bool
  1444. config ARCH_SPARSEMEM_ENABLE
  1445. bool
  1446. config ARCH_SPARSEMEM_DEFAULT
  1447. def_bool ARCH_SPARSEMEM_ENABLE
  1448. config ARCH_SELECT_MEMORY_MODEL
  1449. def_bool ARCH_SPARSEMEM_ENABLE
  1450. config HAVE_ARCH_PFN_VALID
  1451. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1452. config HIGHMEM
  1453. bool "High Memory Support"
  1454. depends on MMU
  1455. help
  1456. The address space of ARM processors is only 4 Gigabytes large
  1457. and it has to accommodate user address space, kernel address
  1458. space as well as some memory mapped IO. That means that, if you
  1459. have a large amount of physical memory and/or IO, not all of the
  1460. memory can be "permanently mapped" by the kernel. The physical
  1461. memory that is not permanently mapped is called "high memory".
  1462. Depending on the selected kernel/user memory split, minimum
  1463. vmalloc space and actual amount of RAM, you may not need this
  1464. option which should result in a slightly faster kernel.
  1465. If unsure, say n.
  1466. config HIGHPTE
  1467. bool "Allocate 2nd-level pagetables from highmem"
  1468. depends on HIGHMEM
  1469. config HW_PERF_EVENTS
  1470. bool "Enable hardware performance counter support for perf events"
  1471. depends on PERF_EVENTS && CPU_HAS_PMU
  1472. default y
  1473. help
  1474. Enable hardware performance counter support for perf events. If
  1475. disabled, perf events will use software events only.
  1476. source "mm/Kconfig"
  1477. config FORCE_MAX_ZONEORDER
  1478. int "Maximum zone order" if ARCH_SHMOBILE
  1479. range 11 64 if ARCH_SHMOBILE
  1480. default "9" if SA1111
  1481. default "11"
  1482. help
  1483. The kernel memory allocator divides physically contiguous memory
  1484. blocks into "zones", where each zone is a power of two number of
  1485. pages. This option selects the largest power of two that the kernel
  1486. keeps in the memory allocator. If you need to allocate very large
  1487. blocks of physically contiguous memory, then you may need to
  1488. increase this value.
  1489. This config option is actually maximum order plus one. For example,
  1490. a value of 11 means that the largest free memory block is 2^10 pages.
  1491. config LEDS
  1492. bool "Timer and CPU usage LEDs"
  1493. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1494. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1495. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1496. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1497. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1498. ARCH_AT91 || ARCH_DAVINCI || \
  1499. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1500. help
  1501. If you say Y here, the LEDs on your machine will be used
  1502. to provide useful information about your current system status.
  1503. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1504. be able to select which LEDs are active using the options below. If
  1505. you are compiling a kernel for the EBSA-110 or the LART however, the
  1506. red LED will simply flash regularly to indicate that the system is
  1507. still functional. It is safe to say Y here if you have a CATS
  1508. system, but the driver will do nothing.
  1509. config LEDS_TIMER
  1510. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1511. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1512. || MACH_OMAP_PERSEUS2
  1513. depends on LEDS
  1514. depends on !GENERIC_CLOCKEVENTS
  1515. default y if ARCH_EBSA110
  1516. help
  1517. If you say Y here, one of the system LEDs (the green one on the
  1518. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1519. will flash regularly to indicate that the system is still
  1520. operational. This is mainly useful to kernel hackers who are
  1521. debugging unstable kernels.
  1522. The LART uses the same LED for both Timer LED and CPU usage LED
  1523. functions. You may choose to use both, but the Timer LED function
  1524. will overrule the CPU usage LED.
  1525. config LEDS_CPU
  1526. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1527. !ARCH_OMAP) \
  1528. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1529. || MACH_OMAP_PERSEUS2
  1530. depends on LEDS
  1531. help
  1532. If you say Y here, the red LED will be used to give a good real
  1533. time indication of CPU usage, by lighting whenever the idle task
  1534. is not currently executing.
  1535. The LART uses the same LED for both Timer LED and CPU usage LED
  1536. functions. You may choose to use both, but the Timer LED function
  1537. will overrule the CPU usage LED.
  1538. config ALIGNMENT_TRAP
  1539. bool
  1540. depends on CPU_CP15_MMU
  1541. default y if !ARCH_EBSA110
  1542. select HAVE_PROC_CPU if PROC_FS
  1543. help
  1544. ARM processors cannot fetch/store information which is not
  1545. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1546. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1547. fetch/store instructions will be emulated in software if you say
  1548. here, which has a severe performance impact. This is necessary for
  1549. correct operation of some network protocols. With an IP-only
  1550. configuration it is safe to say N, otherwise say Y.
  1551. config UACCESS_WITH_MEMCPY
  1552. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1553. depends on MMU && EXPERIMENTAL
  1554. default y if CPU_FEROCEON
  1555. help
  1556. Implement faster copy_to_user and clear_user methods for CPU
  1557. cores where a 8-word STM instruction give significantly higher
  1558. memory write throughput than a sequence of individual 32bit stores.
  1559. A possible side effect is a slight increase in scheduling latency
  1560. between threads sharing the same address space if they invoke
  1561. such copy operations with large buffers.
  1562. However, if the CPU data cache is using a write-allocate mode,
  1563. this option is unlikely to provide any performance gain.
  1564. config SECCOMP
  1565. bool
  1566. prompt "Enable seccomp to safely compute untrusted bytecode"
  1567. ---help---
  1568. This kernel feature is useful for number crunching applications
  1569. that may need to compute untrusted bytecode during their
  1570. execution. By using pipes or other transports made available to
  1571. the process as file descriptors supporting the read/write
  1572. syscalls, it's possible to isolate those applications in
  1573. their own address space using seccomp. Once seccomp is
  1574. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1575. and the task is only allowed to execute a few safe syscalls
  1576. defined by each seccomp mode.
  1577. config CC_STACKPROTECTOR
  1578. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1579. depends on EXPERIMENTAL
  1580. help
  1581. This option turns on the -fstack-protector GCC feature. This
  1582. feature puts, at the beginning of functions, a canary value on
  1583. the stack just before the return address, and validates
  1584. the value just before actually returning. Stack based buffer
  1585. overflows (that need to overwrite this return address) now also
  1586. overwrite the canary, which gets detected and the attack is then
  1587. neutralized via a kernel panic.
  1588. This feature requires gcc version 4.2 or above.
  1589. config DEPRECATED_PARAM_STRUCT
  1590. bool "Provide old way to pass kernel parameters"
  1591. help
  1592. This was deprecated in 2001 and announced to live on for 5 years.
  1593. Some old boot loaders still use this way.
  1594. endmenu
  1595. menu "Boot options"
  1596. config USE_OF
  1597. bool "Flattened Device Tree support"
  1598. select OF
  1599. select OF_EARLY_FLATTREE
  1600. select IRQ_DOMAIN
  1601. help
  1602. Include support for flattened device tree machine descriptions.
  1603. # Compressed boot loader in ROM. Yes, we really want to ask about
  1604. # TEXT and BSS so we preserve their values in the config files.
  1605. config ZBOOT_ROM_TEXT
  1606. hex "Compressed ROM boot loader base address"
  1607. default "0"
  1608. help
  1609. The physical address at which the ROM-able zImage is to be
  1610. placed in the target. Platforms which normally make use of
  1611. ROM-able zImage formats normally set this to a suitable
  1612. value in their defconfig file.
  1613. If ZBOOT_ROM is not enabled, this has no effect.
  1614. config ZBOOT_ROM_BSS
  1615. hex "Compressed ROM boot loader BSS address"
  1616. default "0"
  1617. help
  1618. The base address of an area of read/write memory in the target
  1619. for the ROM-able zImage which must be available while the
  1620. decompressor is running. It must be large enough to hold the
  1621. entire decompressed kernel plus an additional 128 KiB.
  1622. Platforms which normally make use of ROM-able zImage formats
  1623. normally set this to a suitable value in their defconfig file.
  1624. If ZBOOT_ROM is not enabled, this has no effect.
  1625. config ZBOOT_ROM
  1626. bool "Compressed boot loader in ROM/flash"
  1627. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1628. help
  1629. Say Y here if you intend to execute your compressed kernel image
  1630. (zImage) directly from ROM or flash. If unsure, say N.
  1631. choice
  1632. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1633. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1634. default ZBOOT_ROM_NONE
  1635. help
  1636. Include experimental SD/MMC loading code in the ROM-able zImage.
  1637. With this enabled it is possible to write the ROM-able zImage
  1638. kernel image to an MMC or SD card and boot the kernel straight
  1639. from the reset vector. At reset the processor Mask ROM will load
  1640. the first part of the ROM-able zImage which in turn loads the
  1641. rest the kernel image to RAM.
  1642. config ZBOOT_ROM_NONE
  1643. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1644. help
  1645. Do not load image from SD or MMC
  1646. config ZBOOT_ROM_MMCIF
  1647. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1648. help
  1649. Load image from MMCIF hardware block.
  1650. config ZBOOT_ROM_SH_MOBILE_SDHI
  1651. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1652. help
  1653. Load image from SDHI hardware block
  1654. endchoice
  1655. config ARM_APPENDED_DTB
  1656. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1657. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1658. help
  1659. With this option, the boot code will look for a device tree binary
  1660. (DTB) appended to zImage
  1661. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1662. This is meant as a backward compatibility convenience for those
  1663. systems with a bootloader that can't be upgraded to accommodate
  1664. the documented boot protocol using a device tree.
  1665. Beware that there is very little in terms of protection against
  1666. this option being confused by leftover garbage in memory that might
  1667. look like a DTB header after a reboot if no actual DTB is appended
  1668. to zImage. Do not leave this option active in a production kernel
  1669. if you don't intend to always append a DTB. Proper passing of the
  1670. location into r2 of a bootloader provided DTB is always preferable
  1671. to this option.
  1672. config ARM_ATAG_DTB_COMPAT
  1673. bool "Supplement the appended DTB with traditional ATAG information"
  1674. depends on ARM_APPENDED_DTB
  1675. help
  1676. Some old bootloaders can't be updated to a DTB capable one, yet
  1677. they provide ATAGs with memory configuration, the ramdisk address,
  1678. the kernel cmdline string, etc. Such information is dynamically
  1679. provided by the bootloader and can't always be stored in a static
  1680. DTB. To allow a device tree enabled kernel to be used with such
  1681. bootloaders, this option allows zImage to extract the information
  1682. from the ATAG list and store it at run time into the appended DTB.
  1683. config CMDLINE
  1684. string "Default kernel command string"
  1685. default ""
  1686. help
  1687. On some architectures (EBSA110 and CATS), there is currently no way
  1688. for the boot loader to pass arguments to the kernel. For these
  1689. architectures, you should supply some command-line options at build
  1690. time by entering them here. As a minimum, you should specify the
  1691. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1692. choice
  1693. prompt "Kernel command line type" if CMDLINE != ""
  1694. default CMDLINE_FROM_BOOTLOADER
  1695. config CMDLINE_FROM_BOOTLOADER
  1696. bool "Use bootloader kernel arguments if available"
  1697. help
  1698. Uses the command-line options passed by the boot loader. If
  1699. the boot loader doesn't provide any, the default kernel command
  1700. string provided in CMDLINE will be used.
  1701. config CMDLINE_EXTEND
  1702. bool "Extend bootloader kernel arguments"
  1703. help
  1704. The command-line arguments provided by the boot loader will be
  1705. appended to the default kernel command string.
  1706. config CMDLINE_FORCE
  1707. bool "Always use the default kernel command string"
  1708. help
  1709. Always use the default kernel command string, even if the boot
  1710. loader passes other arguments to the kernel.
  1711. This is useful if you cannot or don't want to change the
  1712. command-line options your boot loader passes to the kernel.
  1713. endchoice
  1714. config XIP_KERNEL
  1715. bool "Kernel Execute-In-Place from ROM"
  1716. depends on !ZBOOT_ROM && !ARM_LPAE
  1717. help
  1718. Execute-In-Place allows the kernel to run from non-volatile storage
  1719. directly addressable by the CPU, such as NOR flash. This saves RAM
  1720. space since the text section of the kernel is not loaded from flash
  1721. to RAM. Read-write sections, such as the data section and stack,
  1722. are still copied to RAM. The XIP kernel is not compressed since
  1723. it has to run directly from flash, so it will take more space to
  1724. store it. The flash address used to link the kernel object files,
  1725. and for storing it, is configuration dependent. Therefore, if you
  1726. say Y here, you must know the proper physical address where to
  1727. store the kernel image depending on your own flash memory usage.
  1728. Also note that the make target becomes "make xipImage" rather than
  1729. "make zImage" or "make Image". The final kernel binary to put in
  1730. ROM memory will be arch/arm/boot/xipImage.
  1731. If unsure, say N.
  1732. config XIP_PHYS_ADDR
  1733. hex "XIP Kernel Physical Location"
  1734. depends on XIP_KERNEL
  1735. default "0x00080000"
  1736. help
  1737. This is the physical address in your flash memory the kernel will
  1738. be linked for and stored to. This address is dependent on your
  1739. own flash usage.
  1740. config KEXEC
  1741. bool "Kexec system call (EXPERIMENTAL)"
  1742. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1743. help
  1744. kexec is a system call that implements the ability to shutdown your
  1745. current kernel, and to start another kernel. It is like a reboot
  1746. but it is independent of the system firmware. And like a reboot
  1747. you can start any kernel with it, not just Linux.
  1748. It is an ongoing process to be certain the hardware in a machine
  1749. is properly shutdown, so do not be surprised if this code does not
  1750. initially work for you. It may help to enable device hotplugging
  1751. support.
  1752. config ATAGS_PROC
  1753. bool "Export atags in procfs"
  1754. depends on KEXEC
  1755. default y
  1756. help
  1757. Should the atags used to boot the kernel be exported in an "atags"
  1758. file in procfs. Useful with kexec.
  1759. config CRASH_DUMP
  1760. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1761. depends on EXPERIMENTAL
  1762. help
  1763. Generate crash dump after being started by kexec. This should
  1764. be normally only set in special crash dump kernels which are
  1765. loaded in the main kernel with kexec-tools into a specially
  1766. reserved region and then later executed after a crash by
  1767. kdump/kexec. The crash dump kernel must be compiled to a
  1768. memory address not used by the main kernel
  1769. For more details see Documentation/kdump/kdump.txt
  1770. config AUTO_ZRELADDR
  1771. bool "Auto calculation of the decompressed kernel image address"
  1772. depends on !ZBOOT_ROM && !ARCH_U300
  1773. help
  1774. ZRELADDR is the physical address where the decompressed kernel
  1775. image will be placed. If AUTO_ZRELADDR is selected, the address
  1776. will be determined at run-time by masking the current IP with
  1777. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1778. from start of memory.
  1779. endmenu
  1780. menu "CPU Power Management"
  1781. if ARCH_HAS_CPUFREQ
  1782. source "drivers/cpufreq/Kconfig"
  1783. config CPU_FREQ_IMX
  1784. tristate "CPUfreq driver for i.MX CPUs"
  1785. depends on ARCH_MXC && CPU_FREQ
  1786. help
  1787. This enables the CPUfreq driver for i.MX CPUs.
  1788. config CPU_FREQ_SA1100
  1789. bool
  1790. config CPU_FREQ_SA1110
  1791. bool
  1792. config CPU_FREQ_INTEGRATOR
  1793. tristate "CPUfreq driver for ARM Integrator CPUs"
  1794. depends on ARCH_INTEGRATOR && CPU_FREQ
  1795. default y
  1796. help
  1797. This enables the CPUfreq driver for ARM Integrator CPUs.
  1798. For details, take a look at <file:Documentation/cpu-freq>.
  1799. If in doubt, say Y.
  1800. config CPU_FREQ_PXA
  1801. bool
  1802. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1803. default y
  1804. select CPU_FREQ_TABLE
  1805. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1806. config CPU_FREQ_S3C
  1807. bool
  1808. help
  1809. Internal configuration node for common cpufreq on Samsung SoC
  1810. config CPU_FREQ_S3C24XX
  1811. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1812. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1813. select CPU_FREQ_S3C
  1814. help
  1815. This enables the CPUfreq driver for the Samsung S3C24XX family
  1816. of CPUs.
  1817. For details, take a look at <file:Documentation/cpu-freq>.
  1818. If in doubt, say N.
  1819. config CPU_FREQ_S3C24XX_PLL
  1820. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1821. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1822. help
  1823. Compile in support for changing the PLL frequency from the
  1824. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1825. after a frequency change, so by default it is not enabled.
  1826. This also means that the PLL tables for the selected CPU(s) will
  1827. be built which may increase the size of the kernel image.
  1828. config CPU_FREQ_S3C24XX_DEBUG
  1829. bool "Debug CPUfreq Samsung driver core"
  1830. depends on CPU_FREQ_S3C24XX
  1831. help
  1832. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1833. config CPU_FREQ_S3C24XX_IODEBUG
  1834. bool "Debug CPUfreq Samsung driver IO timing"
  1835. depends on CPU_FREQ_S3C24XX
  1836. help
  1837. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1838. config CPU_FREQ_S3C24XX_DEBUGFS
  1839. bool "Export debugfs for CPUFreq"
  1840. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1841. help
  1842. Export status information via debugfs.
  1843. endif
  1844. source "drivers/cpuidle/Kconfig"
  1845. endmenu
  1846. menu "Floating point emulation"
  1847. comment "At least one emulation must be selected"
  1848. config FPE_NWFPE
  1849. bool "NWFPE math emulation"
  1850. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1851. ---help---
  1852. Say Y to include the NWFPE floating point emulator in the kernel.
  1853. This is necessary to run most binaries. Linux does not currently
  1854. support floating point hardware so you need to say Y here even if
  1855. your machine has an FPA or floating point co-processor podule.
  1856. You may say N here if you are going to load the Acorn FPEmulator
  1857. early in the bootup.
  1858. config FPE_NWFPE_XP
  1859. bool "Support extended precision"
  1860. depends on FPE_NWFPE
  1861. help
  1862. Say Y to include 80-bit support in the kernel floating-point
  1863. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1864. Note that gcc does not generate 80-bit operations by default,
  1865. so in most cases this option only enlarges the size of the
  1866. floating point emulator without any good reason.
  1867. You almost surely want to say N here.
  1868. config FPE_FASTFPE
  1869. bool "FastFPE math emulation (EXPERIMENTAL)"
  1870. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1871. ---help---
  1872. Say Y here to include the FAST floating point emulator in the kernel.
  1873. This is an experimental much faster emulator which now also has full
  1874. precision for the mantissa. It does not support any exceptions.
  1875. It is very simple, and approximately 3-6 times faster than NWFPE.
  1876. It should be sufficient for most programs. It may be not suitable
  1877. for scientific calculations, but you have to check this for yourself.
  1878. If you do not feel you need a faster FP emulation you should better
  1879. choose NWFPE.
  1880. config VFP
  1881. bool "VFP-format floating point maths"
  1882. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1883. help
  1884. Say Y to include VFP support code in the kernel. This is needed
  1885. if your hardware includes a VFP unit.
  1886. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1887. release notes and additional status information.
  1888. Say N if your target does not have VFP hardware.
  1889. config VFPv3
  1890. bool
  1891. depends on VFP
  1892. default y if CPU_V7
  1893. config NEON
  1894. bool "Advanced SIMD (NEON) Extension support"
  1895. depends on VFPv3 && CPU_V7
  1896. help
  1897. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1898. Extension.
  1899. endmenu
  1900. menu "Userspace binary formats"
  1901. source "fs/Kconfig.binfmt"
  1902. config ARTHUR
  1903. tristate "RISC OS personality"
  1904. depends on !AEABI
  1905. help
  1906. Say Y here to include the kernel code necessary if you want to run
  1907. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1908. experimental; if this sounds frightening, say N and sleep in peace.
  1909. You can also say M here to compile this support as a module (which
  1910. will be called arthur).
  1911. endmenu
  1912. menu "Power management options"
  1913. source "kernel/power/Kconfig"
  1914. config ARCH_SUSPEND_POSSIBLE
  1915. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1916. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1917. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1918. def_bool y
  1919. config ARM_CPU_SUSPEND
  1920. def_bool PM_SLEEP
  1921. endmenu
  1922. source "net/Kconfig"
  1923. source "drivers/Kconfig"
  1924. source "fs/Kconfig"
  1925. source "arch/arm/Kconfig.debug"
  1926. source "security/Kconfig"
  1927. source "crypto/Kconfig"
  1928. source "lib/Kconfig"