Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  5. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  6. select ARCH_HAVE_CUSTOM_GPIO_H
  7. select ARCH_WANT_IPC_PARSE_VERSION
  8. select CPU_PM if (SUSPEND || CPU_IDLE)
  9. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  12. select GENERIC_IRQ_PROBE
  13. select GENERIC_IRQ_SHOW
  14. select GENERIC_KERNEL_THREAD
  15. select GENERIC_KERNEL_EXECVE
  16. select GENERIC_PCI_IOMAP
  17. select GENERIC_SMP_IDLE_THREAD
  18. select GENERIC_STRNCPY_FROM_USER
  19. select GENERIC_STRNLEN_USER
  20. select HARDIRQS_SW_RESEND
  21. select HAVE_AOUT
  22. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  23. select HAVE_ARCH_KGDB
  24. select HAVE_ARCH_TRACEHOOK
  25. select HAVE_BPF_JIT
  26. select HAVE_C_RECORDMCOUNT
  27. select HAVE_DEBUG_KMEMLEAK
  28. select HAVE_DMA_API_DEBUG
  29. select HAVE_DMA_ATTRS
  30. select HAVE_DMA_CONTIGUOUS if MMU
  31. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  32. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  33. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  34. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  35. select HAVE_GENERIC_DMA_COHERENT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_IDE if PCI || ISA || PCMCIA
  39. select HAVE_IRQ_WORK
  40. select HAVE_KERNEL_GZIP
  41. select HAVE_KERNEL_LZMA
  42. select HAVE_KERNEL_LZO
  43. select HAVE_KERNEL_XZ
  44. select HAVE_KPROBES if !XIP_KERNEL
  45. select HAVE_KRETPROBES if (HAVE_KPROBES)
  46. select HAVE_MEMBLOCK
  47. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  48. select HAVE_PERF_EVENTS
  49. select HAVE_REGS_AND_STACK_ACCESS_API
  50. select HAVE_SYSCALL_TRACEPOINTS
  51. select HAVE_UID16
  52. select KTIME_SCALAR
  53. select PERF_USE_VMALLOC
  54. select RTC_LIB
  55. select SYS_SUPPORTS_APM_EMULATION
  56. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  57. select MODULES_USE_ELF_REL
  58. help
  59. The ARM series is a line of low-power-consumption RISC chip designs
  60. licensed by ARM Ltd and targeted at embedded applications and
  61. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  62. manufactured, but legacy ARM-based PC hardware remains popular in
  63. Europe. There is an ARM Linux project with a web page at
  64. <http://www.arm.linux.org.uk/>.
  65. config ARM_HAS_SG_CHAIN
  66. bool
  67. config NEED_SG_DMA_LENGTH
  68. bool
  69. config ARM_DMA_USE_IOMMU
  70. bool
  71. select ARM_HAS_SG_CHAIN
  72. select NEED_SG_DMA_LENGTH
  73. config HAVE_PWM
  74. bool
  75. config MIGHT_HAVE_PCI
  76. bool
  77. config SYS_SUPPORTS_APM_EMULATION
  78. bool
  79. config GENERIC_GPIO
  80. bool
  81. config HAVE_TCM
  82. bool
  83. select GENERIC_ALLOCATOR
  84. config HAVE_PROC_CPU
  85. bool
  86. config NO_IOPORT
  87. bool
  88. config EISA
  89. bool
  90. ---help---
  91. The Extended Industry Standard Architecture (EISA) bus was
  92. developed as an open alternative to the IBM MicroChannel bus.
  93. The EISA bus provided some of the features of the IBM MicroChannel
  94. bus while maintaining backward compatibility with cards made for
  95. the older ISA bus. The EISA bus saw limited use between 1988 and
  96. 1995 when it was made obsolete by the PCI bus.
  97. Say Y here if you are building a kernel for an EISA-based machine.
  98. Otherwise, say N.
  99. config SBUS
  100. bool
  101. config STACKTRACE_SUPPORT
  102. bool
  103. default y
  104. config HAVE_LATENCYTOP_SUPPORT
  105. bool
  106. depends on !SMP
  107. default y
  108. config LOCKDEP_SUPPORT
  109. bool
  110. default y
  111. config TRACE_IRQFLAGS_SUPPORT
  112. bool
  113. default y
  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 GENERIC_HWEIGHT
  130. bool
  131. default y
  132. config GENERIC_CALIBRATE_DELAY
  133. bool
  134. default y
  135. config ARCH_MAY_HAVE_PC_FDC
  136. bool
  137. config ZONE_DMA
  138. bool
  139. config NEED_DMA_MAP_STATE
  140. def_bool y
  141. config ARCH_HAS_DMA_SET_COHERENT_MASK
  142. bool
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config NEED_RET_TO_USER
  148. bool
  149. config ARCH_MTD_XIP
  150. bool
  151. config VECTORS_BASE
  152. hex
  153. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  154. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  155. default 0x00000000
  156. help
  157. The base address of exception vectors.
  158. config ARM_PATCH_PHYS_VIRT
  159. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  160. default y
  161. depends on !XIP_KERNEL && MMU
  162. depends on !ARCH_REALVIEW || !SPARSEMEM
  163. help
  164. Patch phys-to-virt and virt-to-phys translation functions at
  165. boot and module load time according to the position of the
  166. kernel in system memory.
  167. This can only be used with non-XIP MMU kernels where the base
  168. of physical memory is at a 16MB boundary.
  169. Only disable this option if you know that you do not require
  170. this feature (eg, building a kernel for a single machine) and
  171. you need to shrink the kernel to the minimal size.
  172. config NEED_MACH_GPIO_H
  173. bool
  174. help
  175. Select this when mach/gpio.h is required to provide special
  176. definitions for this platform. The need for mach/gpio.h should
  177. be avoided when possible.
  178. config NEED_MACH_IO_H
  179. bool
  180. help
  181. Select this when mach/io.h is required to provide special
  182. definitions for this platform. The need for mach/io.h should
  183. be avoided when possible.
  184. config NEED_MACH_MEMORY_H
  185. bool
  186. help
  187. Select this when mach/memory.h is required to provide special
  188. definitions for this platform. The need for mach/memory.h should
  189. be avoided when possible.
  190. config PHYS_OFFSET
  191. hex "Physical address of main memory" if MMU
  192. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  193. default DRAM_BASE if !MMU
  194. help
  195. Please provide the physical address corresponding to the
  196. location of main memory in your system.
  197. config GENERIC_BUG
  198. def_bool y
  199. depends on BUG
  200. source "init/Kconfig"
  201. source "kernel/Kconfig.freezer"
  202. menu "System Type"
  203. config MMU
  204. bool "MMU-based Paged Memory Management Support"
  205. default y
  206. help
  207. Select if you want MMU-based virtualised addressing space
  208. support by paged memory management. If unsure, say 'Y'.
  209. #
  210. # The "ARM system type" choice list is ordered alphabetically by option
  211. # text. Please add new entries in the option alphabetic order.
  212. #
  213. choice
  214. prompt "ARM system type"
  215. default ARCH_MULTIPLATFORM
  216. config ARCH_MULTIPLATFORM
  217. bool "Allow multiple platforms to be selected"
  218. depends on MMU
  219. select ARM_PATCH_PHYS_VIRT
  220. select AUTO_ZRELADDR
  221. select COMMON_CLK
  222. select MULTI_IRQ_HANDLER
  223. select SPARSE_IRQ
  224. select USE_OF
  225. config ARCH_INTEGRATOR
  226. bool "ARM Ltd. Integrator family"
  227. select ARCH_HAS_CPUFREQ
  228. select ARM_AMBA
  229. select COMMON_CLK
  230. select COMMON_CLK_VERSATILE
  231. select GENERIC_CLOCKEVENTS
  232. select HAVE_TCM
  233. select ICST
  234. select MULTI_IRQ_HANDLER
  235. select NEED_MACH_MEMORY_H
  236. select PLAT_VERSATILE
  237. select PLAT_VERSATILE_FPGA_IRQ
  238. select SPARSE_IRQ
  239. help
  240. Support for ARM's Integrator platform.
  241. config ARCH_REALVIEW
  242. bool "ARM Ltd. RealView family"
  243. select ARCH_WANT_OPTIONAL_GPIOLIB
  244. select ARM_AMBA
  245. select ARM_TIMER_SP804
  246. select COMMON_CLK
  247. select COMMON_CLK_VERSATILE
  248. select GENERIC_CLOCKEVENTS
  249. select GPIO_PL061 if GPIOLIB
  250. select ICST
  251. select NEED_MACH_MEMORY_H
  252. select PLAT_VERSATILE
  253. select PLAT_VERSATILE_CLCD
  254. help
  255. This enables support for ARM Ltd RealView boards.
  256. config ARCH_VERSATILE
  257. bool "ARM Ltd. Versatile family"
  258. select ARCH_WANT_OPTIONAL_GPIOLIB
  259. select ARM_AMBA
  260. select ARM_TIMER_SP804
  261. select ARM_VIC
  262. select CLKDEV_LOOKUP
  263. select GENERIC_CLOCKEVENTS
  264. select HAVE_MACH_CLKDEV
  265. select ICST
  266. select PLAT_VERSATILE
  267. select PLAT_VERSATILE_CLCD
  268. select PLAT_VERSATILE_CLOCK
  269. select PLAT_VERSATILE_FPGA_IRQ
  270. help
  271. This enables support for ARM Ltd Versatile board.
  272. config ARCH_AT91
  273. bool "Atmel AT91"
  274. select ARCH_REQUIRE_GPIOLIB
  275. select CLKDEV_LOOKUP
  276. select HAVE_CLK
  277. select IRQ_DOMAIN
  278. select NEED_MACH_GPIO_H
  279. select NEED_MACH_IO_H if PCCARD
  280. help
  281. This enables support for systems based on Atmel
  282. AT91RM9200 and AT91SAM9* processors.
  283. config ARCH_BCM2835
  284. bool "Broadcom BCM2835 family"
  285. select ARCH_WANT_OPTIONAL_GPIOLIB
  286. select ARM_AMBA
  287. select ARM_ERRATA_411920
  288. select ARM_TIMER_SP804
  289. select CLKDEV_LOOKUP
  290. select COMMON_CLK
  291. select CPU_V6
  292. select GENERIC_CLOCKEVENTS
  293. select MULTI_IRQ_HANDLER
  294. select SPARSE_IRQ
  295. select USE_OF
  296. help
  297. This enables support for the Broadcom BCM2835 SoC. This SoC is
  298. use in the Raspberry Pi, and Roku 2 devices.
  299. config ARCH_CNS3XXX
  300. bool "Cavium Networks CNS3XXX family"
  301. select ARM_GIC
  302. select CPU_V6K
  303. select GENERIC_CLOCKEVENTS
  304. select MIGHT_HAVE_CACHE_L2X0
  305. select MIGHT_HAVE_PCI
  306. select PCI_DOMAINS if PCI
  307. help
  308. Support for Cavium Networks CNS3XXX platform.
  309. config ARCH_CLPS711X
  310. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  311. select ARCH_USES_GETTIMEOFFSET
  312. select CLKDEV_LOOKUP
  313. select COMMON_CLK
  314. select CPU_ARM720T
  315. select NEED_MACH_MEMORY_H
  316. help
  317. Support for Cirrus Logic 711x/721x/731x based boards.
  318. config ARCH_GEMINI
  319. bool "Cortina Systems Gemini"
  320. select ARCH_REQUIRE_GPIOLIB
  321. select ARCH_USES_GETTIMEOFFSET
  322. select CPU_FA526
  323. help
  324. Support for the Cortina Systems Gemini family SoCs
  325. config ARCH_SIRF
  326. bool "CSR SiRF"
  327. select ARCH_REQUIRE_GPIOLIB
  328. select COMMON_CLK
  329. select GENERIC_CLOCKEVENTS
  330. select GENERIC_IRQ_CHIP
  331. select MIGHT_HAVE_CACHE_L2X0
  332. select NO_IOPORT
  333. select PINCTRL
  334. select PINCTRL_SIRF
  335. select USE_OF
  336. help
  337. Support for CSR SiRFprimaII/Marco/Polo platforms
  338. config ARCH_EBSA110
  339. bool "EBSA-110"
  340. select ARCH_USES_GETTIMEOFFSET
  341. select CPU_SA110
  342. select ISA
  343. select NEED_MACH_IO_H
  344. select NEED_MACH_MEMORY_H
  345. select NO_IOPORT
  346. help
  347. This is an evaluation board for the StrongARM processor available
  348. from Digital. It has limited hardware on-board, including an
  349. Ethernet interface, two PCMCIA sockets, two serial ports and a
  350. parallel port.
  351. config ARCH_EP93XX
  352. bool "EP93xx-based"
  353. select ARCH_HAS_HOLES_MEMORYMODEL
  354. select ARCH_REQUIRE_GPIOLIB
  355. select ARCH_USES_GETTIMEOFFSET
  356. select ARM_AMBA
  357. select ARM_VIC
  358. select CLKDEV_LOOKUP
  359. select CPU_ARM920T
  360. select NEED_MACH_MEMORY_H
  361. help
  362. This enables support for the Cirrus EP93xx series of CPUs.
  363. config ARCH_FOOTBRIDGE
  364. bool "FootBridge"
  365. select CPU_SA110
  366. select FOOTBRIDGE
  367. select GENERIC_CLOCKEVENTS
  368. select HAVE_IDE
  369. select NEED_MACH_IO_H if !MMU
  370. select NEED_MACH_MEMORY_H
  371. help
  372. Support for systems based on the DC21285 companion chip
  373. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  374. config ARCH_MXC
  375. bool "Freescale MXC/iMX-based"
  376. select ARCH_REQUIRE_GPIOLIB
  377. select CLKDEV_LOOKUP
  378. select CLKSRC_MMIO
  379. select GENERIC_CLOCKEVENTS
  380. select GENERIC_IRQ_CHIP
  381. select MULTI_IRQ_HANDLER
  382. select SPARSE_IRQ
  383. select USE_OF
  384. help
  385. Support for Freescale MXC/iMX-based family of processors
  386. config ARCH_MXS
  387. bool "Freescale MXS-based"
  388. select ARCH_REQUIRE_GPIOLIB
  389. select CLKDEV_LOOKUP
  390. select CLKSRC_MMIO
  391. select COMMON_CLK
  392. select GENERIC_CLOCKEVENTS
  393. select HAVE_CLK_PREPARE
  394. select MULTI_IRQ_HANDLER
  395. select PINCTRL
  396. select SPARSE_IRQ
  397. select USE_OF
  398. help
  399. Support for Freescale MXS-based family of processors
  400. config ARCH_NETX
  401. bool "Hilscher NetX based"
  402. select ARM_VIC
  403. select CLKSRC_MMIO
  404. select CPU_ARM926T
  405. select GENERIC_CLOCKEVENTS
  406. help
  407. This enables support for systems based on the Hilscher NetX Soc
  408. config ARCH_H720X
  409. bool "Hynix HMS720x-based"
  410. select ARCH_USES_GETTIMEOFFSET
  411. select CPU_ARM720T
  412. select ISA_DMA_API
  413. help
  414. This enables support for systems based on the Hynix HMS720x
  415. config ARCH_IOP13XX
  416. bool "IOP13xx-based"
  417. depends on MMU
  418. select ARCH_SUPPORTS_MSI
  419. select CPU_XSC3
  420. select NEED_MACH_MEMORY_H
  421. select NEED_RET_TO_USER
  422. select PCI
  423. select PLAT_IOP
  424. select VMSPLIT_1G
  425. help
  426. Support for Intel's IOP13XX (XScale) family of processors.
  427. config ARCH_IOP32X
  428. bool "IOP32x-based"
  429. depends on MMU
  430. select ARCH_REQUIRE_GPIOLIB
  431. select CPU_XSCALE
  432. select NEED_MACH_GPIO_H
  433. select NEED_RET_TO_USER
  434. select PCI
  435. select PLAT_IOP
  436. help
  437. Support for Intel's 80219 and IOP32X (XScale) family of
  438. processors.
  439. config ARCH_IOP33X
  440. bool "IOP33x-based"
  441. depends on MMU
  442. select ARCH_REQUIRE_GPIOLIB
  443. select CPU_XSCALE
  444. select NEED_MACH_GPIO_H
  445. select NEED_RET_TO_USER
  446. select PCI
  447. select PLAT_IOP
  448. help
  449. Support for Intel's IOP33X (XScale) family of processors.
  450. config ARCH_IXP4XX
  451. bool "IXP4xx-based"
  452. depends on MMU
  453. select ARCH_HAS_DMA_SET_COHERENT_MASK
  454. select ARCH_REQUIRE_GPIOLIB
  455. select CLKSRC_MMIO
  456. select CPU_XSCALE
  457. select DMABOUNCE if PCI
  458. select GENERIC_CLOCKEVENTS
  459. select MIGHT_HAVE_PCI
  460. select NEED_MACH_IO_H
  461. help
  462. Support for Intel's IXP4XX (XScale) family of processors.
  463. config ARCH_DOVE
  464. bool "Marvell Dove"
  465. select ARCH_REQUIRE_GPIOLIB
  466. select CPU_V7
  467. select GENERIC_CLOCKEVENTS
  468. select MIGHT_HAVE_PCI
  469. select PLAT_ORION_LEGACY
  470. select USB_ARCH_HAS_EHCI
  471. help
  472. Support for the Marvell Dove SoC 88AP510
  473. config ARCH_KIRKWOOD
  474. bool "Marvell Kirkwood"
  475. select ARCH_REQUIRE_GPIOLIB
  476. select CPU_FEROCEON
  477. select GENERIC_CLOCKEVENTS
  478. select PCI
  479. select PLAT_ORION_LEGACY
  480. help
  481. Support for the following Marvell Kirkwood series SoCs:
  482. 88F6180, 88F6192 and 88F6281.
  483. config ARCH_MV78XX0
  484. bool "Marvell MV78xx0"
  485. select ARCH_REQUIRE_GPIOLIB
  486. select CPU_FEROCEON
  487. select GENERIC_CLOCKEVENTS
  488. select PCI
  489. select PLAT_ORION_LEGACY
  490. help
  491. Support for the following Marvell MV78xx0 series SoCs:
  492. MV781x0, MV782x0.
  493. config ARCH_ORION5X
  494. bool "Marvell Orion"
  495. depends on MMU
  496. select ARCH_REQUIRE_GPIOLIB
  497. select CPU_FEROCEON
  498. select GENERIC_CLOCKEVENTS
  499. select PCI
  500. select PLAT_ORION_LEGACY
  501. help
  502. Support for the following Marvell Orion 5x series SoCs:
  503. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  504. Orion-2 (5281), Orion-1-90 (6183).
  505. config ARCH_MMP
  506. bool "Marvell PXA168/910/MMP2"
  507. depends on MMU
  508. select ARCH_REQUIRE_GPIOLIB
  509. select CLKDEV_LOOKUP
  510. select GENERIC_ALLOCATOR
  511. select GENERIC_CLOCKEVENTS
  512. select GPIO_PXA
  513. select IRQ_DOMAIN
  514. select NEED_MACH_GPIO_H
  515. select PLAT_PXA
  516. select SPARSE_IRQ
  517. help
  518. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  519. config ARCH_KS8695
  520. bool "Micrel/Kendin KS8695"
  521. select ARCH_REQUIRE_GPIOLIB
  522. select CLKSRC_MMIO
  523. select CPU_ARM922T
  524. select GENERIC_CLOCKEVENTS
  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 ARCH_REQUIRE_GPIOLIB
  532. select CLKDEV_LOOKUP
  533. select CLKSRC_MMIO
  534. select CPU_ARM926T
  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_LPC32XX
  544. bool "NXP LPC32XX"
  545. select ARCH_REQUIRE_GPIOLIB
  546. select ARM_AMBA
  547. select CLKDEV_LOOKUP
  548. select CLKSRC_MMIO
  549. select CPU_ARM926T
  550. select GENERIC_CLOCKEVENTS
  551. select HAVE_IDE
  552. select HAVE_PWM
  553. select USB_ARCH_HAS_OHCI
  554. select USE_OF
  555. help
  556. Support for the NXP LPC32XX family of processors
  557. config ARCH_TEGRA
  558. bool "NVIDIA Tegra"
  559. select ARCH_HAS_CPUFREQ
  560. select CLKDEV_LOOKUP
  561. select CLKSRC_MMIO
  562. select COMMON_CLK
  563. select GENERIC_CLOCKEVENTS
  564. select GENERIC_GPIO
  565. select HAVE_CLK
  566. select HAVE_SMP
  567. select MIGHT_HAVE_CACHE_L2X0
  568. select USE_OF
  569. help
  570. This enables support for NVIDIA Tegra based systems (Tegra APX,
  571. Tegra 6xx and Tegra 2 series).
  572. config ARCH_PXA
  573. bool "PXA2xx/PXA3xx-based"
  574. depends on MMU
  575. select ARCH_HAS_CPUFREQ
  576. select ARCH_MTD_XIP
  577. select ARCH_REQUIRE_GPIOLIB
  578. select ARM_CPU_SUSPEND if PM
  579. select AUTO_ZRELADDR
  580. select CLKDEV_LOOKUP
  581. select CLKSRC_MMIO
  582. select GENERIC_CLOCKEVENTS
  583. select GPIO_PXA
  584. select HAVE_IDE
  585. select MULTI_IRQ_HANDLER
  586. select NEED_MACH_GPIO_H
  587. select PLAT_PXA
  588. select SPARSE_IRQ
  589. help
  590. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  591. config ARCH_MSM
  592. bool "Qualcomm MSM"
  593. select ARCH_REQUIRE_GPIOLIB
  594. select CLKDEV_LOOKUP
  595. select GENERIC_CLOCKEVENTS
  596. select HAVE_CLK
  597. help
  598. Support for Qualcomm MSM/QSD based systems. This runs on the
  599. apps processor of the MSM/QSD and depends on a shared memory
  600. interface to the modem processor which runs the baseband
  601. stack and controls some vital subsystems
  602. (clock and power control, etc).
  603. config ARCH_SHMOBILE
  604. bool "Renesas SH-Mobile / R-Mobile"
  605. select CLKDEV_LOOKUP
  606. select GENERIC_CLOCKEVENTS
  607. select HAVE_CLK
  608. select HAVE_MACH_CLKDEV
  609. select HAVE_SMP
  610. select MIGHT_HAVE_CACHE_L2X0
  611. select MULTI_IRQ_HANDLER
  612. select NEED_MACH_MEMORY_H
  613. select NO_IOPORT
  614. select PM_GENERIC_DOMAINS if PM
  615. select SPARSE_IRQ
  616. help
  617. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  618. config ARCH_RPC
  619. bool "RiscPC"
  620. select ARCH_ACORN
  621. select ARCH_MAY_HAVE_PC_FDC
  622. select ARCH_SPARSEMEM_ENABLE
  623. select ARCH_USES_GETTIMEOFFSET
  624. select FIQ
  625. select HAVE_IDE
  626. select HAVE_PATA_PLATFORM
  627. select ISA_DMA_API
  628. select NEED_MACH_IO_H
  629. select NEED_MACH_MEMORY_H
  630. select NO_IOPORT
  631. help
  632. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  633. CD-ROM interface, serial and parallel port, and the floppy drive.
  634. config ARCH_SA1100
  635. bool "SA1100-based"
  636. select ARCH_HAS_CPUFREQ
  637. select ARCH_MTD_XIP
  638. select ARCH_REQUIRE_GPIOLIB
  639. select ARCH_SPARSEMEM_ENABLE
  640. select CLKDEV_LOOKUP
  641. select CLKSRC_MMIO
  642. select CPU_FREQ
  643. select CPU_SA1100
  644. select GENERIC_CLOCKEVENTS
  645. select HAVE_IDE
  646. select ISA
  647. select NEED_MACH_GPIO_H
  648. select NEED_MACH_MEMORY_H
  649. select SPARSE_IRQ
  650. help
  651. Support for StrongARM 11x0 based boards.
  652. config ARCH_S3C24XX
  653. bool "Samsung S3C24XX SoCs"
  654. select ARCH_HAS_CPUFREQ
  655. select ARCH_USES_GETTIMEOFFSET
  656. select CLKDEV_LOOKUP
  657. select GENERIC_GPIO
  658. select HAVE_CLK
  659. select HAVE_S3C2410_I2C if I2C
  660. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  661. select HAVE_S3C_RTC if RTC_CLASS
  662. select NEED_MACH_GPIO_H
  663. select NEED_MACH_IO_H
  664. help
  665. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  666. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  667. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  668. Samsung SMDK2410 development board (and derivatives).
  669. config ARCH_S3C64XX
  670. bool "Samsung S3C64XX"
  671. select ARCH_HAS_CPUFREQ
  672. select ARCH_REQUIRE_GPIOLIB
  673. select ARCH_USES_GETTIMEOFFSET
  674. select ARM_VIC
  675. select CLKDEV_LOOKUP
  676. select CPU_V6
  677. select HAVE_CLK
  678. select HAVE_S3C2410_I2C if I2C
  679. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  680. select HAVE_TCM
  681. select NEED_MACH_GPIO_H
  682. select NO_IOPORT
  683. select PLAT_SAMSUNG
  684. select S3C_DEV_NAND
  685. select S3C_GPIO_TRACK
  686. select SAMSUNG_CLKSRC
  687. select SAMSUNG_GPIOLIB_4BIT
  688. select SAMSUNG_IRQ_VIC_TIMER
  689. select USB_ARCH_HAS_OHCI
  690. help
  691. Samsung S3C64XX series based systems
  692. config ARCH_S5P64X0
  693. bool "Samsung S5P6440 S5P6450"
  694. select CLKDEV_LOOKUP
  695. select CLKSRC_MMIO
  696. select CPU_V6
  697. select GENERIC_CLOCKEVENTS
  698. select GENERIC_GPIO
  699. select HAVE_CLK
  700. select HAVE_S3C2410_I2C if I2C
  701. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  702. select HAVE_S3C_RTC if RTC_CLASS
  703. select NEED_MACH_GPIO_H
  704. help
  705. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  706. SMDK6450.
  707. config ARCH_S5PC100
  708. bool "Samsung S5PC100"
  709. select ARCH_USES_GETTIMEOFFSET
  710. select CLKDEV_LOOKUP
  711. select CPU_V7
  712. select GENERIC_GPIO
  713. select HAVE_CLK
  714. select HAVE_S3C2410_I2C if I2C
  715. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  716. select HAVE_S3C_RTC if RTC_CLASS
  717. select NEED_MACH_GPIO_H
  718. help
  719. Samsung S5PC100 series based systems
  720. config ARCH_S5PV210
  721. bool "Samsung S5PV210/S5PC110"
  722. select ARCH_HAS_CPUFREQ
  723. select ARCH_HAS_HOLES_MEMORYMODEL
  724. select ARCH_SPARSEMEM_ENABLE
  725. select CLKDEV_LOOKUP
  726. select CLKSRC_MMIO
  727. select CPU_V7
  728. select GENERIC_CLOCKEVENTS
  729. select GENERIC_GPIO
  730. select HAVE_CLK
  731. select HAVE_S3C2410_I2C if I2C
  732. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  733. select HAVE_S3C_RTC if RTC_CLASS
  734. select NEED_MACH_GPIO_H
  735. select NEED_MACH_MEMORY_H
  736. help
  737. Samsung S5PV210/S5PC110 series based systems
  738. config ARCH_EXYNOS
  739. bool "Samsung EXYNOS"
  740. select ARCH_HAS_CPUFREQ
  741. select ARCH_HAS_HOLES_MEMORYMODEL
  742. select ARCH_SPARSEMEM_ENABLE
  743. select CLKDEV_LOOKUP
  744. select CPU_V7
  745. select GENERIC_CLOCKEVENTS
  746. select GENERIC_GPIO
  747. select HAVE_CLK
  748. select HAVE_S3C2410_I2C if I2C
  749. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  750. select HAVE_S3C_RTC if RTC_CLASS
  751. select NEED_MACH_GPIO_H
  752. select NEED_MACH_MEMORY_H
  753. help
  754. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  755. config ARCH_SHARK
  756. bool "Shark"
  757. select ARCH_USES_GETTIMEOFFSET
  758. select CPU_SA110
  759. select ISA
  760. select ISA_DMA
  761. select NEED_MACH_MEMORY_H
  762. select PCI
  763. select ZONE_DMA
  764. help
  765. Support for the StrongARM based Digital DNARD machine, also known
  766. as "Shark" (<http://www.shark-linux.de/shark.html>).
  767. config ARCH_U300
  768. bool "ST-Ericsson U300 Series"
  769. depends on MMU
  770. select ARCH_REQUIRE_GPIOLIB
  771. select ARM_AMBA
  772. select ARM_PATCH_PHYS_VIRT
  773. select ARM_VIC
  774. select CLKDEV_LOOKUP
  775. select CLKSRC_MMIO
  776. select COMMON_CLK
  777. select CPU_ARM926T
  778. select GENERIC_CLOCKEVENTS
  779. select GENERIC_GPIO
  780. select HAVE_TCM
  781. select SPARSE_IRQ
  782. help
  783. Support for ST-Ericsson U300 series mobile platforms.
  784. config ARCH_U8500
  785. bool "ST-Ericsson U8500 Series"
  786. depends on MMU
  787. select ARCH_HAS_CPUFREQ
  788. select ARCH_REQUIRE_GPIOLIB
  789. select ARM_AMBA
  790. select CLKDEV_LOOKUP
  791. select CPU_V7
  792. select GENERIC_CLOCKEVENTS
  793. select HAVE_SMP
  794. select MIGHT_HAVE_CACHE_L2X0
  795. help
  796. Support for ST-Ericsson's Ux500 architecture
  797. config ARCH_NOMADIK
  798. bool "STMicroelectronics Nomadik"
  799. select ARCH_REQUIRE_GPIOLIB
  800. select ARM_AMBA
  801. select ARM_VIC
  802. select COMMON_CLK
  803. select CPU_ARM926T
  804. select GENERIC_CLOCKEVENTS
  805. select MIGHT_HAVE_CACHE_L2X0
  806. select PINCTRL
  807. select PINCTRL_STN8815
  808. help
  809. Support for the Nomadik platform by ST-Ericsson
  810. config PLAT_SPEAR
  811. bool "ST SPEAr"
  812. select ARCH_REQUIRE_GPIOLIB
  813. select ARM_AMBA
  814. select CLKDEV_LOOKUP
  815. select CLKSRC_MMIO
  816. select COMMON_CLK
  817. select GENERIC_CLOCKEVENTS
  818. select HAVE_CLK
  819. help
  820. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  821. config ARCH_DAVINCI
  822. bool "TI DaVinci"
  823. select ARCH_HAS_HOLES_MEMORYMODEL
  824. select ARCH_REQUIRE_GPIOLIB
  825. select CLKDEV_LOOKUP
  826. select GENERIC_ALLOCATOR
  827. select GENERIC_CLOCKEVENTS
  828. select GENERIC_IRQ_CHIP
  829. select HAVE_IDE
  830. select NEED_MACH_GPIO_H
  831. select ZONE_DMA
  832. help
  833. Support for TI's DaVinci platform.
  834. config ARCH_OMAP
  835. bool "TI OMAP"
  836. depends on MMU
  837. select ARCH_HAS_CPUFREQ
  838. select ARCH_HAS_HOLES_MEMORYMODEL
  839. select ARCH_REQUIRE_GPIOLIB
  840. select CLKSRC_MMIO
  841. select GENERIC_CLOCKEVENTS
  842. select HAVE_CLK
  843. select NEED_MACH_GPIO_H
  844. help
  845. Support for TI's OMAP platform (OMAP1/2/3/4).
  846. config ARCH_VT8500
  847. bool "VIA/WonderMedia 85xx"
  848. select ARCH_HAS_CPUFREQ
  849. select ARCH_REQUIRE_GPIOLIB
  850. select CLKDEV_LOOKUP
  851. select COMMON_CLK
  852. select CPU_ARM926T
  853. select GENERIC_CLOCKEVENTS
  854. select GENERIC_GPIO
  855. select HAVE_CLK
  856. select USE_OF
  857. help
  858. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  859. config ARCH_ZYNQ
  860. bool "Xilinx Zynq ARM Cortex A9 Platform"
  861. select ARM_AMBA
  862. select ARM_GIC
  863. select CLKDEV_LOOKUP
  864. select CPU_V7
  865. select GENERIC_CLOCKEVENTS
  866. select ICST
  867. select MIGHT_HAVE_CACHE_L2X0
  868. select USE_OF
  869. help
  870. Support for Xilinx Zynq ARM Cortex A9 Platform
  871. endchoice
  872. menu "Multiple platform selection"
  873. depends on ARCH_MULTIPLATFORM
  874. comment "CPU Core family selection"
  875. config ARCH_MULTI_V4
  876. bool "ARMv4 based platforms (FA526, StrongARM)"
  877. depends on !ARCH_MULTI_V6_V7
  878. select ARCH_MULTI_V4_V5
  879. config ARCH_MULTI_V4T
  880. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  881. depends on !ARCH_MULTI_V6_V7
  882. select ARCH_MULTI_V4_V5
  883. config ARCH_MULTI_V5
  884. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  885. depends on !ARCH_MULTI_V6_V7
  886. select ARCH_MULTI_V4_V5
  887. config ARCH_MULTI_V4_V5
  888. bool
  889. config ARCH_MULTI_V6
  890. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  891. select ARCH_MULTI_V6_V7
  892. select CPU_V6
  893. config ARCH_MULTI_V7
  894. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  895. default y
  896. select ARCH_MULTI_V6_V7
  897. select ARCH_VEXPRESS
  898. select CPU_V7
  899. config ARCH_MULTI_V6_V7
  900. bool
  901. config ARCH_MULTI_CPU_AUTO
  902. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  903. select ARCH_MULTI_V5
  904. endmenu
  905. #
  906. # This is sorted alphabetically by mach-* pathname. However, plat-*
  907. # Kconfigs may be included either alphabetically (according to the
  908. # plat- suffix) or along side the corresponding mach-* source.
  909. #
  910. source "arch/arm/mach-mvebu/Kconfig"
  911. source "arch/arm/mach-at91/Kconfig"
  912. source "arch/arm/mach-clps711x/Kconfig"
  913. source "arch/arm/mach-cns3xxx/Kconfig"
  914. source "arch/arm/mach-davinci/Kconfig"
  915. source "arch/arm/mach-dove/Kconfig"
  916. source "arch/arm/mach-ep93xx/Kconfig"
  917. source "arch/arm/mach-footbridge/Kconfig"
  918. source "arch/arm/mach-gemini/Kconfig"
  919. source "arch/arm/mach-h720x/Kconfig"
  920. source "arch/arm/mach-highbank/Kconfig"
  921. source "arch/arm/mach-integrator/Kconfig"
  922. source "arch/arm/mach-iop32x/Kconfig"
  923. source "arch/arm/mach-iop33x/Kconfig"
  924. source "arch/arm/mach-iop13xx/Kconfig"
  925. source "arch/arm/mach-ixp4xx/Kconfig"
  926. source "arch/arm/mach-kirkwood/Kconfig"
  927. source "arch/arm/mach-ks8695/Kconfig"
  928. source "arch/arm/mach-msm/Kconfig"
  929. source "arch/arm/mach-mv78xx0/Kconfig"
  930. source "arch/arm/plat-mxc/Kconfig"
  931. source "arch/arm/mach-mxs/Kconfig"
  932. source "arch/arm/mach-netx/Kconfig"
  933. source "arch/arm/mach-nomadik/Kconfig"
  934. source "arch/arm/plat-nomadik/Kconfig"
  935. source "arch/arm/plat-omap/Kconfig"
  936. source "arch/arm/mach-omap1/Kconfig"
  937. source "arch/arm/mach-omap2/Kconfig"
  938. source "arch/arm/mach-orion5x/Kconfig"
  939. source "arch/arm/mach-picoxcell/Kconfig"
  940. source "arch/arm/mach-pxa/Kconfig"
  941. source "arch/arm/plat-pxa/Kconfig"
  942. source "arch/arm/mach-mmp/Kconfig"
  943. source "arch/arm/mach-realview/Kconfig"
  944. source "arch/arm/mach-sa1100/Kconfig"
  945. source "arch/arm/plat-samsung/Kconfig"
  946. source "arch/arm/plat-s3c24xx/Kconfig"
  947. source "arch/arm/mach-socfpga/Kconfig"
  948. source "arch/arm/plat-spear/Kconfig"
  949. source "arch/arm/mach-s3c24xx/Kconfig"
  950. if ARCH_S3C24XX
  951. source "arch/arm/mach-s3c2412/Kconfig"
  952. source "arch/arm/mach-s3c2440/Kconfig"
  953. endif
  954. if ARCH_S3C64XX
  955. source "arch/arm/mach-s3c64xx/Kconfig"
  956. endif
  957. source "arch/arm/mach-s5p64x0/Kconfig"
  958. source "arch/arm/mach-s5pc100/Kconfig"
  959. source "arch/arm/mach-s5pv210/Kconfig"
  960. source "arch/arm/mach-exynos/Kconfig"
  961. source "arch/arm/mach-shmobile/Kconfig"
  962. source "arch/arm/mach-prima2/Kconfig"
  963. source "arch/arm/mach-tegra/Kconfig"
  964. source "arch/arm/mach-u300/Kconfig"
  965. source "arch/arm/mach-ux500/Kconfig"
  966. source "arch/arm/mach-versatile/Kconfig"
  967. source "arch/arm/mach-vexpress/Kconfig"
  968. source "arch/arm/plat-versatile/Kconfig"
  969. source "arch/arm/mach-w90x900/Kconfig"
  970. # Definitions to make life easier
  971. config ARCH_ACORN
  972. bool
  973. config PLAT_IOP
  974. bool
  975. select GENERIC_CLOCKEVENTS
  976. config PLAT_ORION
  977. bool
  978. select CLKSRC_MMIO
  979. select COMMON_CLK
  980. select GENERIC_IRQ_CHIP
  981. select IRQ_DOMAIN
  982. config PLAT_ORION_LEGACY
  983. bool
  984. select PLAT_ORION
  985. config PLAT_PXA
  986. bool
  987. config PLAT_VERSATILE
  988. bool
  989. config ARM_TIMER_SP804
  990. bool
  991. select CLKSRC_MMIO
  992. select HAVE_SCHED_CLOCK
  993. source arch/arm/mm/Kconfig
  994. config ARM_NR_BANKS
  995. int
  996. default 16 if ARCH_EP93XX
  997. default 8
  998. config IWMMXT
  999. bool "Enable iWMMXt support"
  1000. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1001. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1002. help
  1003. Enable support for iWMMXt context switching at run time if
  1004. running on a CPU that supports it.
  1005. config XSCALE_PMU
  1006. bool
  1007. depends on CPU_XSCALE
  1008. default y
  1009. config MULTI_IRQ_HANDLER
  1010. bool
  1011. help
  1012. Allow each machine to specify it's own IRQ handler at run time.
  1013. if !MMU
  1014. source "arch/arm/Kconfig-nommu"
  1015. endif
  1016. config ARM_ERRATA_326103
  1017. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1018. depends on CPU_V6
  1019. help
  1020. Executing a SWP instruction to read-only memory does not set bit 11
  1021. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1022. treat the access as a read, preventing a COW from occurring and
  1023. causing the faulting task to livelock.
  1024. config ARM_ERRATA_411920
  1025. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1026. depends on CPU_V6 || CPU_V6K
  1027. help
  1028. Invalidation of the Instruction Cache operation can
  1029. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1030. It does not affect the MPCore. This option enables the ARM Ltd.
  1031. recommended workaround.
  1032. config ARM_ERRATA_430973
  1033. bool "ARM errata: Stale prediction on replaced interworking branch"
  1034. depends on CPU_V7
  1035. help
  1036. This option enables the workaround for the 430973 Cortex-A8
  1037. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1038. interworking branch is replaced with another code sequence at the
  1039. same virtual address, whether due to self-modifying code or virtual
  1040. to physical address re-mapping, Cortex-A8 does not recover from the
  1041. stale interworking branch prediction. This results in Cortex-A8
  1042. executing the new code sequence in the incorrect ARM or Thumb state.
  1043. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1044. and also flushes the branch target cache at every context switch.
  1045. Note that setting specific bits in the ACTLR register may not be
  1046. available in non-secure mode.
  1047. config ARM_ERRATA_458693
  1048. bool "ARM errata: Processor deadlock when a false hazard is created"
  1049. depends on CPU_V7
  1050. help
  1051. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1052. erratum. For very specific sequences of memory operations, it is
  1053. possible for a hazard condition intended for a cache line to instead
  1054. be incorrectly associated with a different cache line. This false
  1055. hazard might then cause a processor deadlock. The workaround enables
  1056. the L1 caching of the NEON accesses and disables the PLD instruction
  1057. in the ACTLR register. Note that setting specific bits in the ACTLR
  1058. register may not be available in non-secure mode.
  1059. config ARM_ERRATA_460075
  1060. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1061. depends on CPU_V7
  1062. help
  1063. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1064. erratum. Any asynchronous access to the L2 cache may encounter a
  1065. situation in which recent store transactions to the L2 cache are lost
  1066. and overwritten with stale memory contents from external memory. The
  1067. workaround disables the write-allocate mode for the L2 cache via the
  1068. ACTLR register. Note that setting specific bits in the ACTLR register
  1069. may not be available in non-secure mode.
  1070. config ARM_ERRATA_742230
  1071. bool "ARM errata: DMB operation may be faulty"
  1072. depends on CPU_V7 && SMP
  1073. help
  1074. This option enables the workaround for the 742230 Cortex-A9
  1075. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1076. between two write operations may not ensure the correct visibility
  1077. ordering of the two writes. This workaround sets a specific bit in
  1078. the diagnostic register of the Cortex-A9 which causes the DMB
  1079. instruction to behave as a DSB, ensuring the correct behaviour of
  1080. the two writes.
  1081. config ARM_ERRATA_742231
  1082. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1083. depends on CPU_V7 && SMP
  1084. help
  1085. This option enables the workaround for the 742231 Cortex-A9
  1086. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1087. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1088. accessing some data located in the same cache line, may get corrupted
  1089. data due to bad handling of the address hazard when the line gets
  1090. replaced from one of the CPUs at the same time as another CPU is
  1091. accessing it. This workaround sets specific bits in the diagnostic
  1092. register of the Cortex-A9 which reduces the linefill issuing
  1093. capabilities of the processor.
  1094. config PL310_ERRATA_588369
  1095. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1096. depends on CACHE_L2X0
  1097. help
  1098. The PL310 L2 cache controller implements three types of Clean &
  1099. Invalidate maintenance operations: by Physical Address
  1100. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1101. They are architecturally defined to behave as the execution of a
  1102. clean operation followed immediately by an invalidate operation,
  1103. both performing to the same memory location. This functionality
  1104. is not correctly implemented in PL310 as clean lines are not
  1105. invalidated as a result of these operations.
  1106. config ARM_ERRATA_720789
  1107. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1108. depends on CPU_V7
  1109. help
  1110. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1111. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1112. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1113. As a consequence of this erratum, some TLB entries which should be
  1114. invalidated are not, resulting in an incoherency in the system page
  1115. tables. The workaround changes the TLB flushing routines to invalidate
  1116. entries regardless of the ASID.
  1117. config PL310_ERRATA_727915
  1118. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1119. depends on CACHE_L2X0
  1120. help
  1121. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1122. operation (offset 0x7FC). This operation runs in background so that
  1123. PL310 can handle normal accesses while it is in progress. Under very
  1124. rare circumstances, due to this erratum, write data can be lost when
  1125. PL310 treats a cacheable write transaction during a Clean &
  1126. Invalidate by Way operation.
  1127. config ARM_ERRATA_743622
  1128. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1129. depends on CPU_V7
  1130. help
  1131. This option enables the workaround for the 743622 Cortex-A9
  1132. (r2p*) erratum. Under very rare conditions, a faulty
  1133. optimisation in the Cortex-A9 Store Buffer may lead to data
  1134. corruption. This workaround sets a specific bit in the diagnostic
  1135. register of the Cortex-A9 which disables the Store Buffer
  1136. optimisation, preventing the defect from occurring. This has no
  1137. visible impact on the overall performance or power consumption of the
  1138. processor.
  1139. config ARM_ERRATA_751472
  1140. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1141. depends on CPU_V7
  1142. help
  1143. This option enables the workaround for the 751472 Cortex-A9 (prior
  1144. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1145. completion of a following broadcasted operation if the second
  1146. operation is received by a CPU before the ICIALLUIS has completed,
  1147. potentially leading to corrupted entries in the cache or TLB.
  1148. config PL310_ERRATA_753970
  1149. bool "PL310 errata: cache sync operation may be faulty"
  1150. depends on CACHE_PL310
  1151. help
  1152. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1153. Under some condition the effect of cache sync operation on
  1154. the store buffer still remains when the operation completes.
  1155. This means that the store buffer is always asked to drain and
  1156. this prevents it from merging any further writes. The workaround
  1157. is to replace the normal offset of cache sync operation (0x730)
  1158. by another offset targeting an unmapped PL310 register 0x740.
  1159. This has the same effect as the cache sync operation: store buffer
  1160. drain and waiting for all buffers empty.
  1161. config ARM_ERRATA_754322
  1162. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1163. depends on CPU_V7
  1164. help
  1165. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1166. r3p*) erratum. A speculative memory access may cause a page table walk
  1167. which starts prior to an ASID switch but completes afterwards. This
  1168. can populate the micro-TLB with a stale entry which may be hit with
  1169. the new ASID. This workaround places two dsb instructions in the mm
  1170. switching code so that no page table walks can cross the ASID switch.
  1171. config ARM_ERRATA_754327
  1172. bool "ARM errata: no automatic Store Buffer drain"
  1173. depends on CPU_V7 && SMP
  1174. help
  1175. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1176. r2p0) erratum. The Store Buffer does not have any automatic draining
  1177. mechanism and therefore a livelock may occur if an external agent
  1178. continuously polls a memory location waiting to observe an update.
  1179. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1180. written polling loops from denying visibility of updates to memory.
  1181. config ARM_ERRATA_364296
  1182. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1183. depends on CPU_V6 && !SMP
  1184. help
  1185. This options enables the workaround for the 364296 ARM1136
  1186. r0p2 erratum (possible cache data corruption with
  1187. hit-under-miss enabled). It sets the undocumented bit 31 in
  1188. the auxiliary control register and the FI bit in the control
  1189. register, thus disabling hit-under-miss without putting the
  1190. processor into full low interrupt latency mode. ARM11MPCore
  1191. is not affected.
  1192. config ARM_ERRATA_764369
  1193. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1194. depends on CPU_V7 && SMP
  1195. help
  1196. This option enables the workaround for erratum 764369
  1197. affecting Cortex-A9 MPCore with two or more processors (all
  1198. current revisions). Under certain timing circumstances, a data
  1199. cache line maintenance operation by MVA targeting an Inner
  1200. Shareable memory region may fail to proceed up to either the
  1201. Point of Coherency or to the Point of Unification of the
  1202. system. This workaround adds a DSB instruction before the
  1203. relevant cache maintenance functions and sets a specific bit
  1204. in the diagnostic control register of the SCU.
  1205. config PL310_ERRATA_769419
  1206. bool "PL310 errata: no automatic Store Buffer drain"
  1207. depends on CACHE_L2X0
  1208. help
  1209. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1210. not automatically drain. This can cause normal, non-cacheable
  1211. writes to be retained when the memory system is idle, leading
  1212. to suboptimal I/O performance for drivers using coherent DMA.
  1213. This option adds a write barrier to the cpu_idle loop so that,
  1214. on systems with an outer cache, the store buffer is drained
  1215. explicitly.
  1216. config ARM_ERRATA_775420
  1217. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1218. depends on CPU_V7
  1219. help
  1220. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1221. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1222. operation aborts with MMU exception, it might cause the processor
  1223. to deadlock. This workaround puts DSB before executing ISB if
  1224. an abort may occur on cache maintenance.
  1225. endmenu
  1226. source "arch/arm/common/Kconfig"
  1227. menu "Bus support"
  1228. config ARM_AMBA
  1229. bool
  1230. config ISA
  1231. bool
  1232. help
  1233. Find out whether you have ISA slots on your motherboard. ISA is the
  1234. name of a bus system, i.e. the way the CPU talks to the other stuff
  1235. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1236. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1237. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1238. # Select ISA DMA controller support
  1239. config ISA_DMA
  1240. bool
  1241. select ISA_DMA_API
  1242. # Select ISA DMA interface
  1243. config ISA_DMA_API
  1244. bool
  1245. config PCI
  1246. bool "PCI support" if MIGHT_HAVE_PCI
  1247. help
  1248. Find out whether you have a PCI motherboard. PCI is the name of a
  1249. bus system, i.e. the way the CPU talks to the other stuff inside
  1250. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1251. VESA. If you have PCI, say Y, otherwise N.
  1252. config PCI_DOMAINS
  1253. bool
  1254. depends on PCI
  1255. config PCI_NANOENGINE
  1256. bool "BSE nanoEngine PCI support"
  1257. depends on SA1100_NANOENGINE
  1258. help
  1259. Enable PCI on the BSE nanoEngine board.
  1260. config PCI_SYSCALL
  1261. def_bool PCI
  1262. # Select the host bridge type
  1263. config PCI_HOST_VIA82C505
  1264. bool
  1265. depends on PCI && ARCH_SHARK
  1266. default y
  1267. config PCI_HOST_ITE8152
  1268. bool
  1269. depends on PCI && MACH_ARMCORE
  1270. default y
  1271. select DMABOUNCE
  1272. source "drivers/pci/Kconfig"
  1273. source "drivers/pcmcia/Kconfig"
  1274. endmenu
  1275. menu "Kernel Features"
  1276. config HAVE_SMP
  1277. bool
  1278. help
  1279. This option should be selected by machines which have an SMP-
  1280. capable CPU.
  1281. The only effect of this option is to make the SMP-related
  1282. options available to the user for configuration.
  1283. config SMP
  1284. bool "Symmetric Multi-Processing"
  1285. depends on CPU_V6K || CPU_V7
  1286. depends on GENERIC_CLOCKEVENTS
  1287. depends on HAVE_SMP
  1288. depends on MMU
  1289. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1290. select USE_GENERIC_SMP_HELPERS
  1291. help
  1292. This enables support for systems with more than one CPU. If you have
  1293. a system with only one CPU, like most personal computers, say N. If
  1294. you have a system with more than one CPU, say Y.
  1295. If you say N here, the kernel will run on single and multiprocessor
  1296. machines, but will use only one CPU of a multiprocessor machine. If
  1297. you say Y here, the kernel will run on many, but not all, single
  1298. processor machines. On a single processor machine, the kernel will
  1299. run faster if you say N here.
  1300. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1301. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1302. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1303. If you don't know what to do here, say N.
  1304. config SMP_ON_UP
  1305. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1306. depends on EXPERIMENTAL
  1307. depends on SMP && !XIP_KERNEL
  1308. default y
  1309. help
  1310. SMP kernels contain instructions which fail on non-SMP processors.
  1311. Enabling this option allows the kernel to modify itself to make
  1312. these instructions safe. Disabling it allows about 1K of space
  1313. savings.
  1314. If you don't know what to do here, say Y.
  1315. config ARM_CPU_TOPOLOGY
  1316. bool "Support cpu topology definition"
  1317. depends on SMP && CPU_V7
  1318. default y
  1319. help
  1320. Support ARM cpu topology definition. The MPIDR register defines
  1321. affinity between processors which is then used to describe the cpu
  1322. topology of an ARM System.
  1323. config SCHED_MC
  1324. bool "Multi-core scheduler support"
  1325. depends on ARM_CPU_TOPOLOGY
  1326. help
  1327. Multi-core scheduler support improves the CPU scheduler's decision
  1328. making when dealing with multi-core CPU chips at a cost of slightly
  1329. increased overhead in some places. If unsure say N here.
  1330. config SCHED_SMT
  1331. bool "SMT scheduler support"
  1332. depends on ARM_CPU_TOPOLOGY
  1333. help
  1334. Improves the CPU scheduler's decision making when dealing with
  1335. MultiThreading at a cost of slightly increased overhead in some
  1336. places. If unsure say N here.
  1337. config HAVE_ARM_SCU
  1338. bool
  1339. help
  1340. This option enables support for the ARM system coherency unit
  1341. config ARM_ARCH_TIMER
  1342. bool "Architected timer support"
  1343. depends on CPU_V7
  1344. help
  1345. This option enables support for the ARM architected timer
  1346. config HAVE_ARM_TWD
  1347. bool
  1348. depends on SMP
  1349. help
  1350. This options enables support for the ARM timer and watchdog unit
  1351. choice
  1352. prompt "Memory split"
  1353. default VMSPLIT_3G
  1354. help
  1355. Select the desired split between kernel and user memory.
  1356. If you are not absolutely sure what you are doing, leave this
  1357. option alone!
  1358. config VMSPLIT_3G
  1359. bool "3G/1G user/kernel split"
  1360. config VMSPLIT_2G
  1361. bool "2G/2G user/kernel split"
  1362. config VMSPLIT_1G
  1363. bool "1G/3G user/kernel split"
  1364. endchoice
  1365. config PAGE_OFFSET
  1366. hex
  1367. default 0x40000000 if VMSPLIT_1G
  1368. default 0x80000000 if VMSPLIT_2G
  1369. default 0xC0000000
  1370. config NR_CPUS
  1371. int "Maximum number of CPUs (2-32)"
  1372. range 2 32
  1373. depends on SMP
  1374. default "4"
  1375. config HOTPLUG_CPU
  1376. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1377. depends on SMP && HOTPLUG && EXPERIMENTAL
  1378. help
  1379. Say Y here to experiment with turning CPUs off and on. CPUs
  1380. can be controlled through /sys/devices/system/cpu.
  1381. config LOCAL_TIMERS
  1382. bool "Use local timer interrupts"
  1383. depends on SMP
  1384. default y
  1385. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1386. help
  1387. Enable support for local timers on SMP platforms, rather then the
  1388. legacy IPI broadcast method. Local timers allows the system
  1389. accounting to be spread across the timer interval, preventing a
  1390. "thundering herd" at every timer tick.
  1391. config ARCH_NR_GPIO
  1392. int
  1393. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1394. default 355 if ARCH_U8500
  1395. default 264 if MACH_H4700
  1396. default 512 if SOC_OMAP5
  1397. default 288 if ARCH_VT8500
  1398. default 0
  1399. help
  1400. Maximum number of GPIOs in the system.
  1401. If unsure, leave the default value.
  1402. source kernel/Kconfig.preempt
  1403. config HZ
  1404. int
  1405. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1406. ARCH_S5PV210 || ARCH_EXYNOS4
  1407. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1408. default AT91_TIMER_HZ if ARCH_AT91
  1409. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1410. default 100
  1411. config THUMB2_KERNEL
  1412. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1413. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1414. select AEABI
  1415. select ARM_ASM_UNIFIED
  1416. select ARM_UNWIND
  1417. help
  1418. By enabling this option, the kernel will be compiled in
  1419. Thumb-2 mode. A compiler/assembler that understand the unified
  1420. ARM-Thumb syntax is needed.
  1421. If unsure, say N.
  1422. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1423. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1424. depends on THUMB2_KERNEL && MODULES
  1425. default y
  1426. help
  1427. Various binutils versions can resolve Thumb-2 branches to
  1428. locally-defined, preemptible global symbols as short-range "b.n"
  1429. branch instructions.
  1430. This is a problem, because there's no guarantee the final
  1431. destination of the symbol, or any candidate locations for a
  1432. trampoline, are within range of the branch. For this reason, the
  1433. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1434. relocation in modules at all, and it makes little sense to add
  1435. support.
  1436. The symptom is that the kernel fails with an "unsupported
  1437. relocation" error when loading some modules.
  1438. Until fixed tools are available, passing
  1439. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1440. code which hits this problem, at the cost of a bit of extra runtime
  1441. stack usage in some cases.
  1442. The problem is described in more detail at:
  1443. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1444. Only Thumb-2 kernels are affected.
  1445. Unless you are sure your tools don't have this problem, say Y.
  1446. config ARM_ASM_UNIFIED
  1447. bool
  1448. config AEABI
  1449. bool "Use the ARM EABI to compile the kernel"
  1450. help
  1451. This option allows for the kernel to be compiled using the latest
  1452. ARM ABI (aka EABI). This is only useful if you are using a user
  1453. space environment that is also compiled with EABI.
  1454. Since there are major incompatibilities between the legacy ABI and
  1455. EABI, especially with regard to structure member alignment, this
  1456. option also changes the kernel syscall calling convention to
  1457. disambiguate both ABIs and allow for backward compatibility support
  1458. (selected with CONFIG_OABI_COMPAT).
  1459. To use this you need GCC version 4.0.0 or later.
  1460. config OABI_COMPAT
  1461. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1462. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1463. default y
  1464. help
  1465. This option preserves the old syscall interface along with the
  1466. new (ARM EABI) one. It also provides a compatibility layer to
  1467. intercept syscalls that have structure arguments which layout
  1468. in memory differs between the legacy ABI and the new ARM EABI
  1469. (only for non "thumb" binaries). This option adds a tiny
  1470. overhead to all syscalls and produces a slightly larger kernel.
  1471. If you know you'll be using only pure EABI user space then you
  1472. can say N here. If this option is not selected and you attempt
  1473. to execute a legacy ABI binary then the result will be
  1474. UNPREDICTABLE (in fact it can be predicted that it won't work
  1475. at all). If in doubt say Y.
  1476. config ARCH_HAS_HOLES_MEMORYMODEL
  1477. bool
  1478. config ARCH_SPARSEMEM_ENABLE
  1479. bool
  1480. config ARCH_SPARSEMEM_DEFAULT
  1481. def_bool ARCH_SPARSEMEM_ENABLE
  1482. config ARCH_SELECT_MEMORY_MODEL
  1483. def_bool ARCH_SPARSEMEM_ENABLE
  1484. config HAVE_ARCH_PFN_VALID
  1485. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1486. config HIGHMEM
  1487. bool "High Memory Support"
  1488. depends on MMU
  1489. help
  1490. The address space of ARM processors is only 4 Gigabytes large
  1491. and it has to accommodate user address space, kernel address
  1492. space as well as some memory mapped IO. That means that, if you
  1493. have a large amount of physical memory and/or IO, not all of the
  1494. memory can be "permanently mapped" by the kernel. The physical
  1495. memory that is not permanently mapped is called "high memory".
  1496. Depending on the selected kernel/user memory split, minimum
  1497. vmalloc space and actual amount of RAM, you may not need this
  1498. option which should result in a slightly faster kernel.
  1499. If unsure, say n.
  1500. config HIGHPTE
  1501. bool "Allocate 2nd-level pagetables from highmem"
  1502. depends on HIGHMEM
  1503. config HW_PERF_EVENTS
  1504. bool "Enable hardware performance counter support for perf events"
  1505. depends on PERF_EVENTS
  1506. default y
  1507. help
  1508. Enable hardware performance counter support for perf events. If
  1509. disabled, perf events will use software events only.
  1510. source "mm/Kconfig"
  1511. config FORCE_MAX_ZONEORDER
  1512. int "Maximum zone order" if ARCH_SHMOBILE
  1513. range 11 64 if ARCH_SHMOBILE
  1514. default "12" if SOC_AM33XX
  1515. default "9" if SA1111
  1516. default "11"
  1517. help
  1518. The kernel memory allocator divides physically contiguous memory
  1519. blocks into "zones", where each zone is a power of two number of
  1520. pages. This option selects the largest power of two that the kernel
  1521. keeps in the memory allocator. If you need to allocate very large
  1522. blocks of physically contiguous memory, then you may need to
  1523. increase this value.
  1524. This config option is actually maximum order plus one. For example,
  1525. a value of 11 means that the largest free memory block is 2^10 pages.
  1526. config ALIGNMENT_TRAP
  1527. bool
  1528. depends on CPU_CP15_MMU
  1529. default y if !ARCH_EBSA110
  1530. select HAVE_PROC_CPU if PROC_FS
  1531. help
  1532. ARM processors cannot fetch/store information which is not
  1533. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1534. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1535. fetch/store instructions will be emulated in software if you say
  1536. here, which has a severe performance impact. This is necessary for
  1537. correct operation of some network protocols. With an IP-only
  1538. configuration it is safe to say N, otherwise say Y.
  1539. config UACCESS_WITH_MEMCPY
  1540. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1541. depends on MMU
  1542. default y if CPU_FEROCEON
  1543. help
  1544. Implement faster copy_to_user and clear_user methods for CPU
  1545. cores where a 8-word STM instruction give significantly higher
  1546. memory write throughput than a sequence of individual 32bit stores.
  1547. A possible side effect is a slight increase in scheduling latency
  1548. between threads sharing the same address space if they invoke
  1549. such copy operations with large buffers.
  1550. However, if the CPU data cache is using a write-allocate mode,
  1551. this option is unlikely to provide any performance gain.
  1552. config SECCOMP
  1553. bool
  1554. prompt "Enable seccomp to safely compute untrusted bytecode"
  1555. ---help---
  1556. This kernel feature is useful for number crunching applications
  1557. that may need to compute untrusted bytecode during their
  1558. execution. By using pipes or other transports made available to
  1559. the process as file descriptors supporting the read/write
  1560. syscalls, it's possible to isolate those applications in
  1561. their own address space using seccomp. Once seccomp is
  1562. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1563. and the task is only allowed to execute a few safe syscalls
  1564. defined by each seccomp mode.
  1565. config CC_STACKPROTECTOR
  1566. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1567. depends on EXPERIMENTAL
  1568. help
  1569. This option turns on the -fstack-protector GCC feature. This
  1570. feature puts, at the beginning of functions, a canary value on
  1571. the stack just before the return address, and validates
  1572. the value just before actually returning. Stack based buffer
  1573. overflows (that need to overwrite this return address) now also
  1574. overwrite the canary, which gets detected and the attack is then
  1575. neutralized via a kernel panic.
  1576. This feature requires gcc version 4.2 or above.
  1577. config XEN_DOM0
  1578. def_bool y
  1579. depends on XEN
  1580. config XEN
  1581. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1582. depends on EXPERIMENTAL && ARM && OF
  1583. help
  1584. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1585. endmenu
  1586. menu "Boot options"
  1587. config USE_OF
  1588. bool "Flattened Device Tree support"
  1589. select IRQ_DOMAIN
  1590. select OF
  1591. select OF_EARLY_FLATTREE
  1592. help
  1593. Include support for flattened device tree machine descriptions.
  1594. config ATAGS
  1595. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1596. default y
  1597. help
  1598. This is the traditional way of passing data to the kernel at boot
  1599. time. If you are solely relying on the flattened device tree (or
  1600. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1601. to remove ATAGS support from your kernel binary. If unsure,
  1602. leave this to y.
  1603. config DEPRECATED_PARAM_STRUCT
  1604. bool "Provide old way to pass kernel parameters"
  1605. depends on ATAGS
  1606. help
  1607. This was deprecated in 2001 and announced to live on for 5 years.
  1608. Some old boot loaders still use this way.
  1609. # Compressed boot loader in ROM. Yes, we really want to ask about
  1610. # TEXT and BSS so we preserve their values in the config files.
  1611. config ZBOOT_ROM_TEXT
  1612. hex "Compressed ROM boot loader base address"
  1613. default "0"
  1614. help
  1615. The physical address at which the ROM-able zImage is to be
  1616. placed in the target. Platforms which normally make use of
  1617. ROM-able zImage formats normally set this to a suitable
  1618. value in their defconfig file.
  1619. If ZBOOT_ROM is not enabled, this has no effect.
  1620. config ZBOOT_ROM_BSS
  1621. hex "Compressed ROM boot loader BSS address"
  1622. default "0"
  1623. help
  1624. The base address of an area of read/write memory in the target
  1625. for the ROM-able zImage which must be available while the
  1626. decompressor is running. It must be large enough to hold the
  1627. entire decompressed kernel plus an additional 128 KiB.
  1628. Platforms which normally make use of ROM-able zImage formats
  1629. normally set this to a suitable value in their defconfig file.
  1630. If ZBOOT_ROM is not enabled, this has no effect.
  1631. config ZBOOT_ROM
  1632. bool "Compressed boot loader in ROM/flash"
  1633. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1634. help
  1635. Say Y here if you intend to execute your compressed kernel image
  1636. (zImage) directly from ROM or flash. If unsure, say N.
  1637. choice
  1638. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1639. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1640. default ZBOOT_ROM_NONE
  1641. help
  1642. Include experimental SD/MMC loading code in the ROM-able zImage.
  1643. With this enabled it is possible to write the ROM-able zImage
  1644. kernel image to an MMC or SD card and boot the kernel straight
  1645. from the reset vector. At reset the processor Mask ROM will load
  1646. the first part of the ROM-able zImage which in turn loads the
  1647. rest the kernel image to RAM.
  1648. config ZBOOT_ROM_NONE
  1649. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1650. help
  1651. Do not load image from SD or MMC
  1652. config ZBOOT_ROM_MMCIF
  1653. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1654. help
  1655. Load image from MMCIF hardware block.
  1656. config ZBOOT_ROM_SH_MOBILE_SDHI
  1657. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1658. help
  1659. Load image from SDHI hardware block
  1660. endchoice
  1661. config ARM_APPENDED_DTB
  1662. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1663. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1664. help
  1665. With this option, the boot code will look for a device tree binary
  1666. (DTB) appended to zImage
  1667. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1668. This is meant as a backward compatibility convenience for those
  1669. systems with a bootloader that can't be upgraded to accommodate
  1670. the documented boot protocol using a device tree.
  1671. Beware that there is very little in terms of protection against
  1672. this option being confused by leftover garbage in memory that might
  1673. look like a DTB header after a reboot if no actual DTB is appended
  1674. to zImage. Do not leave this option active in a production kernel
  1675. if you don't intend to always append a DTB. Proper passing of the
  1676. location into r2 of a bootloader provided DTB is always preferable
  1677. to this option.
  1678. config ARM_ATAG_DTB_COMPAT
  1679. bool "Supplement the appended DTB with traditional ATAG information"
  1680. depends on ARM_APPENDED_DTB
  1681. help
  1682. Some old bootloaders can't be updated to a DTB capable one, yet
  1683. they provide ATAGs with memory configuration, the ramdisk address,
  1684. the kernel cmdline string, etc. Such information is dynamically
  1685. provided by the bootloader and can't always be stored in a static
  1686. DTB. To allow a device tree enabled kernel to be used with such
  1687. bootloaders, this option allows zImage to extract the information
  1688. from the ATAG list and store it at run time into the appended DTB.
  1689. choice
  1690. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1691. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1692. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1693. bool "Use bootloader kernel arguments if available"
  1694. help
  1695. Uses the command-line options passed by the boot loader instead of
  1696. the device tree bootargs property. If the boot loader doesn't provide
  1697. any, the device tree bootargs property will be used.
  1698. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1699. bool "Extend with bootloader kernel arguments"
  1700. help
  1701. The command-line arguments provided by the boot loader will be
  1702. appended to the the device tree bootargs property.
  1703. endchoice
  1704. config CMDLINE
  1705. string "Default kernel command string"
  1706. default ""
  1707. help
  1708. On some architectures (EBSA110 and CATS), there is currently no way
  1709. for the boot loader to pass arguments to the kernel. For these
  1710. architectures, you should supply some command-line options at build
  1711. time by entering them here. As a minimum, you should specify the
  1712. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1713. choice
  1714. prompt "Kernel command line type" if CMDLINE != ""
  1715. default CMDLINE_FROM_BOOTLOADER
  1716. depends on ATAGS
  1717. config CMDLINE_FROM_BOOTLOADER
  1718. bool "Use bootloader kernel arguments if available"
  1719. help
  1720. Uses the command-line options passed by the boot loader. If
  1721. the boot loader doesn't provide any, the default kernel command
  1722. string provided in CMDLINE will be used.
  1723. config CMDLINE_EXTEND
  1724. bool "Extend bootloader kernel arguments"
  1725. help
  1726. The command-line arguments provided by the boot loader will be
  1727. appended to the default kernel command string.
  1728. config CMDLINE_FORCE
  1729. bool "Always use the default kernel command string"
  1730. help
  1731. Always use the default kernel command string, even if the boot
  1732. loader passes other arguments to the kernel.
  1733. This is useful if you cannot or don't want to change the
  1734. command-line options your boot loader passes to the kernel.
  1735. endchoice
  1736. config XIP_KERNEL
  1737. bool "Kernel Execute-In-Place from ROM"
  1738. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1739. help
  1740. Execute-In-Place allows the kernel to run from non-volatile storage
  1741. directly addressable by the CPU, such as NOR flash. This saves RAM
  1742. space since the text section of the kernel is not loaded from flash
  1743. to RAM. Read-write sections, such as the data section and stack,
  1744. are still copied to RAM. The XIP kernel is not compressed since
  1745. it has to run directly from flash, so it will take more space to
  1746. store it. The flash address used to link the kernel object files,
  1747. and for storing it, is configuration dependent. Therefore, if you
  1748. say Y here, you must know the proper physical address where to
  1749. store the kernel image depending on your own flash memory usage.
  1750. Also note that the make target becomes "make xipImage" rather than
  1751. "make zImage" or "make Image". The final kernel binary to put in
  1752. ROM memory will be arch/arm/boot/xipImage.
  1753. If unsure, say N.
  1754. config XIP_PHYS_ADDR
  1755. hex "XIP Kernel Physical Location"
  1756. depends on XIP_KERNEL
  1757. default "0x00080000"
  1758. help
  1759. This is the physical address in your flash memory the kernel will
  1760. be linked for and stored to. This address is dependent on your
  1761. own flash usage.
  1762. config KEXEC
  1763. bool "Kexec system call (EXPERIMENTAL)"
  1764. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1765. help
  1766. kexec is a system call that implements the ability to shutdown your
  1767. current kernel, and to start another kernel. It is like a reboot
  1768. but it is independent of the system firmware. And like a reboot
  1769. you can start any kernel with it, not just Linux.
  1770. It is an ongoing process to be certain the hardware in a machine
  1771. is properly shutdown, so do not be surprised if this code does not
  1772. initially work for you. It may help to enable device hotplugging
  1773. support.
  1774. config ATAGS_PROC
  1775. bool "Export atags in procfs"
  1776. depends on ATAGS && KEXEC
  1777. default y
  1778. help
  1779. Should the atags used to boot the kernel be exported in an "atags"
  1780. file in procfs. Useful with kexec.
  1781. config CRASH_DUMP
  1782. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1783. depends on EXPERIMENTAL
  1784. help
  1785. Generate crash dump after being started by kexec. This should
  1786. be normally only set in special crash dump kernels which are
  1787. loaded in the main kernel with kexec-tools into a specially
  1788. reserved region and then later executed after a crash by
  1789. kdump/kexec. The crash dump kernel must be compiled to a
  1790. memory address not used by the main kernel
  1791. For more details see Documentation/kdump/kdump.txt
  1792. config AUTO_ZRELADDR
  1793. bool "Auto calculation of the decompressed kernel image address"
  1794. depends on !ZBOOT_ROM && !ARCH_U300
  1795. help
  1796. ZRELADDR is the physical address where the decompressed kernel
  1797. image will be placed. If AUTO_ZRELADDR is selected, the address
  1798. will be determined at run-time by masking the current IP with
  1799. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1800. from start of memory.
  1801. endmenu
  1802. menu "CPU Power Management"
  1803. if ARCH_HAS_CPUFREQ
  1804. source "drivers/cpufreq/Kconfig"
  1805. config CPU_FREQ_IMX
  1806. tristate "CPUfreq driver for i.MX CPUs"
  1807. depends on ARCH_MXC && CPU_FREQ
  1808. select CPU_FREQ_TABLE
  1809. help
  1810. This enables the CPUfreq driver for i.MX CPUs.
  1811. config CPU_FREQ_SA1100
  1812. bool
  1813. config CPU_FREQ_SA1110
  1814. bool
  1815. config CPU_FREQ_INTEGRATOR
  1816. tristate "CPUfreq driver for ARM Integrator CPUs"
  1817. depends on ARCH_INTEGRATOR && CPU_FREQ
  1818. default y
  1819. help
  1820. This enables the CPUfreq driver for ARM Integrator CPUs.
  1821. For details, take a look at <file:Documentation/cpu-freq>.
  1822. If in doubt, say Y.
  1823. config CPU_FREQ_PXA
  1824. bool
  1825. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1826. default y
  1827. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1828. select CPU_FREQ_TABLE
  1829. config CPU_FREQ_S3C
  1830. bool
  1831. help
  1832. Internal configuration node for common cpufreq on Samsung SoC
  1833. config CPU_FREQ_S3C24XX
  1834. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1835. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1836. select CPU_FREQ_S3C
  1837. help
  1838. This enables the CPUfreq driver for the Samsung S3C24XX family
  1839. of CPUs.
  1840. For details, take a look at <file:Documentation/cpu-freq>.
  1841. If in doubt, say N.
  1842. config CPU_FREQ_S3C24XX_PLL
  1843. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1844. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1845. help
  1846. Compile in support for changing the PLL frequency from the
  1847. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1848. after a frequency change, so by default it is not enabled.
  1849. This also means that the PLL tables for the selected CPU(s) will
  1850. be built which may increase the size of the kernel image.
  1851. config CPU_FREQ_S3C24XX_DEBUG
  1852. bool "Debug CPUfreq Samsung driver core"
  1853. depends on CPU_FREQ_S3C24XX
  1854. help
  1855. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1856. config CPU_FREQ_S3C24XX_IODEBUG
  1857. bool "Debug CPUfreq Samsung driver IO timing"
  1858. depends on CPU_FREQ_S3C24XX
  1859. help
  1860. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1861. config CPU_FREQ_S3C24XX_DEBUGFS
  1862. bool "Export debugfs for CPUFreq"
  1863. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1864. help
  1865. Export status information via debugfs.
  1866. endif
  1867. source "drivers/cpuidle/Kconfig"
  1868. endmenu
  1869. menu "Floating point emulation"
  1870. comment "At least one emulation must be selected"
  1871. config FPE_NWFPE
  1872. bool "NWFPE math emulation"
  1873. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1874. ---help---
  1875. Say Y to include the NWFPE floating point emulator in the kernel.
  1876. This is necessary to run most binaries. Linux does not currently
  1877. support floating point hardware so you need to say Y here even if
  1878. your machine has an FPA or floating point co-processor podule.
  1879. You may say N here if you are going to load the Acorn FPEmulator
  1880. early in the bootup.
  1881. config FPE_NWFPE_XP
  1882. bool "Support extended precision"
  1883. depends on FPE_NWFPE
  1884. help
  1885. Say Y to include 80-bit support in the kernel floating-point
  1886. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1887. Note that gcc does not generate 80-bit operations by default,
  1888. so in most cases this option only enlarges the size of the
  1889. floating point emulator without any good reason.
  1890. You almost surely want to say N here.
  1891. config FPE_FASTFPE
  1892. bool "FastFPE math emulation (EXPERIMENTAL)"
  1893. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1894. ---help---
  1895. Say Y here to include the FAST floating point emulator in the kernel.
  1896. This is an experimental much faster emulator which now also has full
  1897. precision for the mantissa. It does not support any exceptions.
  1898. It is very simple, and approximately 3-6 times faster than NWFPE.
  1899. It should be sufficient for most programs. It may be not suitable
  1900. for scientific calculations, but you have to check this for yourself.
  1901. If you do not feel you need a faster FP emulation you should better
  1902. choose NWFPE.
  1903. config VFP
  1904. bool "VFP-format floating point maths"
  1905. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1906. help
  1907. Say Y to include VFP support code in the kernel. This is needed
  1908. if your hardware includes a VFP unit.
  1909. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1910. release notes and additional status information.
  1911. Say N if your target does not have VFP hardware.
  1912. config VFPv3
  1913. bool
  1914. depends on VFP
  1915. default y if CPU_V7
  1916. config NEON
  1917. bool "Advanced SIMD (NEON) Extension support"
  1918. depends on VFPv3 && CPU_V7
  1919. help
  1920. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1921. Extension.
  1922. endmenu
  1923. menu "Userspace binary formats"
  1924. source "fs/Kconfig.binfmt"
  1925. config ARTHUR
  1926. tristate "RISC OS personality"
  1927. depends on !AEABI
  1928. help
  1929. Say Y here to include the kernel code necessary if you want to run
  1930. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1931. experimental; if this sounds frightening, say N and sleep in peace.
  1932. You can also say M here to compile this support as a module (which
  1933. will be called arthur).
  1934. endmenu
  1935. menu "Power management options"
  1936. source "kernel/power/Kconfig"
  1937. config ARCH_SUSPEND_POSSIBLE
  1938. depends on !ARCH_S5PC100
  1939. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1940. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1941. def_bool y
  1942. config ARM_CPU_SUSPEND
  1943. def_bool PM_SLEEP
  1944. endmenu
  1945. source "net/Kconfig"
  1946. source "drivers/Kconfig"
  1947. source "fs/Kconfig"
  1948. source "arch/arm/Kconfig.debug"
  1949. source "security/Kconfig"
  1950. source "crypto/Kconfig"
  1951. source "lib/Kconfig"