| 1 | # |
| 2 | # For a description of the syntax of this configuration file, |
| 3 | # see Documentation/kbuild/kconfig-language.txt. |
| 4 | # |
| 5 | |
| 6 | mainmenu "Linux Kernel Configuration" |
| 7 | |
| 8 | config ARM |
| 9 | bool |
| 10 | default y |
| 11 | select HAVE_AOUT |
| 12 | select HAVE_IDE |
| 13 | select RTC_LIB |
| 14 | select SYS_SUPPORTS_APM_EMULATION |
| 15 | select GENERIC_ATOMIC64 if (!CPU_32v6K) |
| 16 | select HAVE_OPROFILE if (HAVE_PERF_EVENTS) |
| 17 | select HAVE_ARCH_KGDB |
| 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_GENERIC_DMA_COHERENT |
| 22 | select HAVE_KERNEL_GZIP |
| 23 | select HAVE_KERNEL_LZO |
| 24 | select HAVE_KERNEL_LZMA |
| 25 | select HAVE_PERF_EVENTS |
| 26 | select PERF_USE_VMALLOC |
| 27 | help |
| 28 | The ARM series is a line of low-power-consumption RISC chip designs |
| 29 | licensed by ARM Ltd and targeted at embedded applications and |
| 30 | handhelds such as the Compaq IPAQ. ARM-based PCs are no longer |
| 31 | manufactured, but legacy ARM-based PC hardware remains popular in |
| 32 | Europe. There is an ARM Linux project with a web page at |
| 33 | <http://www.arm.linux.org.uk/>. |
| 34 | |
| 35 | config HAVE_PWM |
| 36 | bool |
| 37 | |
| 38 | config SYS_SUPPORTS_APM_EMULATION |
| 39 | bool |
| 40 | |
| 41 | config GENERIC_GPIO |
| 42 | bool |
| 43 | |
| 44 | config GENERIC_TIME |
| 45 | bool |
| 46 | default y |
| 47 | |
| 48 | config ARCH_USES_GETTIMEOFFSET |
| 49 | bool |
| 50 | default n |
| 51 | |
| 52 | config GENERIC_CLOCKEVENTS |
| 53 | bool |
| 54 | |
| 55 | config GENERIC_CLOCKEVENTS_BROADCAST |
| 56 | bool |
| 57 | depends on GENERIC_CLOCKEVENTS |
| 58 | default y if SMP && !LOCAL_TIMERS |
| 59 | |
| 60 | config HAVE_TCM |
| 61 | bool |
| 62 | select GENERIC_ALLOCATOR |
| 63 | |
| 64 | config HAVE_PROC_CPU |
| 65 | bool |
| 66 | |
| 67 | config NO_IOPORT |
| 68 | bool |
| 69 | |
| 70 | config EISA |
| 71 | bool |
| 72 | ---help--- |
| 73 | The Extended Industry Standard Architecture (EISA) bus was |
| 74 | developed as an open alternative to the IBM MicroChannel bus. |
| 75 | |
| 76 | The EISA bus provided some of the features of the IBM MicroChannel |
| 77 | bus while maintaining backward compatibility with cards made for |
| 78 | the older ISA bus. The EISA bus saw limited use between 1988 and |
| 79 | 1995 when it was made obsolete by the PCI bus. |
| 80 | |
| 81 | Say Y here if you are building a kernel for an EISA-based machine. |
| 82 | |
| 83 | Otherwise, say N. |
| 84 | |
| 85 | config SBUS |
| 86 | bool |
| 87 | |
| 88 | config MCA |
| 89 | bool |
| 90 | help |
| 91 | MicroChannel Architecture is found in some IBM PS/2 machines and |
| 92 | laptops. It is a bus system similar to PCI or ISA. See |
| 93 | <file:Documentation/mca.txt> (and especially the web page given |
| 94 | there) before attempting to build an MCA bus kernel. |
| 95 | |
| 96 | config GENERIC_HARDIRQS |
| 97 | bool |
| 98 | default y |
| 99 | |
| 100 | config STACKTRACE_SUPPORT |
| 101 | bool |
| 102 | default y |
| 103 | |
| 104 | config HAVE_LATENCYTOP_SUPPORT |
| 105 | bool |
| 106 | depends on !SMP |
| 107 | default y |
| 108 | |
| 109 | config LOCKDEP_SUPPORT |
| 110 | bool |
| 111 | default y |
| 112 | |
| 113 | config TRACE_IRQFLAGS_SUPPORT |
| 114 | bool |
| 115 | default y |
| 116 | |
| 117 | config HARDIRQS_SW_RESEND |
| 118 | bool |
| 119 | default y |
| 120 | |
| 121 | config GENERIC_IRQ_PROBE |
| 122 | bool |
| 123 | default y |
| 124 | |
| 125 | config GENERIC_LOCKBREAK |
| 126 | bool |
| 127 | default y |
| 128 | depends on SMP && PREEMPT |
| 129 | |
| 130 | config RWSEM_GENERIC_SPINLOCK |
| 131 | bool |
| 132 | default y |
| 133 | |
| 134 | config RWSEM_XCHGADD_ALGORITHM |
| 135 | bool |
| 136 | |
| 137 | config ARCH_HAS_ILOG2_U32 |
| 138 | bool |
| 139 | |
| 140 | config ARCH_HAS_ILOG2_U64 |
| 141 | bool |
| 142 | |
| 143 | config ARCH_HAS_CPUFREQ |
| 144 | bool |
| 145 | help |
| 146 | Internal node to signify that the ARCH has CPUFREQ support |
| 147 | and that the relevant menu configurations are displayed for |
| 148 | it. |
| 149 | |
| 150 | config GENERIC_HWEIGHT |
| 151 | bool |
| 152 | default y |
| 153 | |
| 154 | config GENERIC_CALIBRATE_DELAY |
| 155 | bool |
| 156 | default y |
| 157 | |
| 158 | config ARCH_MAY_HAVE_PC_FDC |
| 159 | bool |
| 160 | |
| 161 | config ZONE_DMA |
| 162 | bool |
| 163 | |
| 164 | config NEED_DMA_MAP_STATE |
| 165 | def_bool y |
| 166 | |
| 167 | config GENERIC_ISA_DMA |
| 168 | bool |
| 169 | |
| 170 | config FIQ |
| 171 | bool |
| 172 | |
| 173 | config ARCH_MTD_XIP |
| 174 | bool |
| 175 | |
| 176 | config GENERIC_HARDIRQS_NO__DO_IRQ |
| 177 | def_bool y |
| 178 | |
| 179 | config ARM_L1_CACHE_SHIFT_6 |
| 180 | bool |
| 181 | help |
| 182 | Setting ARM L1 cache line size to 64 Bytes. |
| 183 | |
| 184 | config VECTORS_BASE |
| 185 | hex |
| 186 | default 0xffff0000 if MMU || CPU_HIGH_VECTOR |
| 187 | default DRAM_BASE if REMAP_VECTORS_TO_RAM |
| 188 | default 0x00000000 |
| 189 | help |
| 190 | The base address of exception vectors. |
| 191 | |
| 192 | source "init/Kconfig" |
| 193 | |
| 194 | source "kernel/Kconfig.freezer" |
| 195 | |
| 196 | menu "System Type" |
| 197 | |
| 198 | config MMU |
| 199 | bool "MMU-based Paged Memory Management Support" |
| 200 | default y |
| 201 | help |
| 202 | Select if you want MMU-based virtualised addressing space |
| 203 | support by paged memory management. If unsure, say 'Y'. |
| 204 | |
| 205 | # |
| 206 | # The "ARM system type" choice list is ordered alphabetically by option |
| 207 | # text. Please add new entries in the option alphabetic order. |
| 208 | # |
| 209 | choice |
| 210 | prompt "ARM system type" |
| 211 | default ARCH_VERSATILE |
| 212 | |
| 213 | config ARCH_AAEC2000 |
| 214 | bool "Agilent AAEC-2000 based" |
| 215 | select CPU_ARM920T |
| 216 | select ARM_AMBA |
| 217 | select HAVE_CLK |
| 218 | select ARCH_USES_GETTIMEOFFSET |
| 219 | help |
| 220 | This enables support for systems based on the Agilent AAEC-2000 |
| 221 | |
| 222 | config ARCH_INTEGRATOR |
| 223 | bool "ARM Ltd. Integrator family" |
| 224 | select ARM_AMBA |
| 225 | select ARCH_HAS_CPUFREQ |
| 226 | select COMMON_CLKDEV |
| 227 | select ICST |
| 228 | select GENERIC_CLOCKEVENTS |
| 229 | select PLAT_VERSATILE |
| 230 | help |
| 231 | Support for ARM's Integrator platform. |
| 232 | |
| 233 | config ARCH_REALVIEW |
| 234 | bool "ARM Ltd. RealView family" |
| 235 | select ARM_AMBA |
| 236 | select COMMON_CLKDEV |
| 237 | select ICST |
| 238 | select GENERIC_CLOCKEVENTS |
| 239 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 240 | select PLAT_VERSATILE |
| 241 | select ARM_TIMER_SP804 |
| 242 | select GPIO_PL061 if GPIOLIB |
| 243 | help |
| 244 | This enables support for ARM Ltd RealView boards. |
| 245 | |
| 246 | config ARCH_VERSATILE |
| 247 | bool "ARM Ltd. Versatile family" |
| 248 | select ARM_AMBA |
| 249 | select ARM_VIC |
| 250 | select COMMON_CLKDEV |
| 251 | select ICST |
| 252 | select GENERIC_CLOCKEVENTS |
| 253 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 254 | select PLAT_VERSATILE |
| 255 | select ARM_TIMER_SP804 |
| 256 | help |
| 257 | This enables support for ARM Ltd Versatile board. |
| 258 | |
| 259 | config ARCH_VEXPRESS |
| 260 | bool "ARM Ltd. Versatile Express family" |
| 261 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 262 | select ARM_AMBA |
| 263 | select ARM_TIMER_SP804 |
| 264 | select COMMON_CLKDEV |
| 265 | select GENERIC_CLOCKEVENTS |
| 266 | select HAVE_CLK |
| 267 | select ICST |
| 268 | select PLAT_VERSATILE |
| 269 | help |
| 270 | This enables support for the ARM Ltd Versatile Express boards. |
| 271 | |
| 272 | config ARCH_AT91 |
| 273 | bool "Atmel AT91" |
| 274 | select ARCH_REQUIRE_GPIOLIB |
| 275 | select HAVE_CLK |
| 276 | select ARCH_USES_GETTIMEOFFSET |
| 277 | help |
| 278 | This enables support for systems based on the Atmel AT91RM9200, |
| 279 | AT91SAM9 and AT91CAP9 processors. |
| 280 | |
| 281 | config ARCH_BCMRING |
| 282 | bool "Broadcom BCMRING" |
| 283 | depends on MMU |
| 284 | select CPU_V6 |
| 285 | select ARM_AMBA |
| 286 | select COMMON_CLKDEV |
| 287 | select GENERIC_CLOCKEVENTS |
| 288 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 289 | help |
| 290 | Support for Broadcom's BCMRing platform. |
| 291 | |
| 292 | config ARCH_CLPS711X |
| 293 | bool "Cirrus Logic CLPS711x/EP721x-based" |
| 294 | select CPU_ARM720T |
| 295 | select ARCH_USES_GETTIMEOFFSET |
| 296 | help |
| 297 | Support for Cirrus Logic 711x/721x based boards. |
| 298 | |
| 299 | config ARCH_CNS3XXX |
| 300 | bool "Cavium Networks CNS3XXX family" |
| 301 | select CPU_V6 |
| 302 | select GENERIC_CLOCKEVENTS |
| 303 | select ARM_GIC |
| 304 | help |
| 305 | Support for Cavium Networks CNS3XXX platform. |
| 306 | |
| 307 | config ARCH_GEMINI |
| 308 | bool "Cortina Systems Gemini" |
| 309 | select CPU_FA526 |
| 310 | select ARCH_REQUIRE_GPIOLIB |
| 311 | select ARCH_USES_GETTIMEOFFSET |
| 312 | help |
| 313 | Support for the Cortina Systems Gemini family SoCs |
| 314 | |
| 315 | config ARCH_EBSA110 |
| 316 | bool "EBSA-110" |
| 317 | select CPU_SA110 |
| 318 | select ISA |
| 319 | select NO_IOPORT |
| 320 | select ARCH_USES_GETTIMEOFFSET |
| 321 | help |
| 322 | This is an evaluation board for the StrongARM processor available |
| 323 | from Digital. It has limited hardware on-board, including an |
| 324 | Ethernet interface, two PCMCIA sockets, two serial ports and a |
| 325 | parallel port. |
| 326 | |
| 327 | config ARCH_EP93XX |
| 328 | bool "EP93xx-based" |
| 329 | select CPU_ARM920T |
| 330 | select ARM_AMBA |
| 331 | select ARM_VIC |
| 332 | select COMMON_CLKDEV |
| 333 | select ARCH_REQUIRE_GPIOLIB |
| 334 | select ARCH_HAS_HOLES_MEMORYMODEL |
| 335 | select ARCH_USES_GETTIMEOFFSET |
| 336 | help |
| 337 | This enables support for the Cirrus EP93xx series of CPUs. |
| 338 | |
| 339 | config ARCH_FOOTBRIDGE |
| 340 | bool "FootBridge" |
| 341 | select CPU_SA110 |
| 342 | select FOOTBRIDGE |
| 343 | select ARCH_USES_GETTIMEOFFSET |
| 344 | help |
| 345 | Support for systems based on the DC21285 companion chip |
| 346 | ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. |
| 347 | |
| 348 | config ARCH_MXC |
| 349 | bool "Freescale MXC/iMX-based" |
| 350 | select GENERIC_CLOCKEVENTS |
| 351 | select ARCH_REQUIRE_GPIOLIB |
| 352 | select COMMON_CLKDEV |
| 353 | help |
| 354 | Support for Freescale MXC/iMX-based family of processors |
| 355 | |
| 356 | config ARCH_STMP3XXX |
| 357 | bool "Freescale STMP3xxx" |
| 358 | select CPU_ARM926T |
| 359 | select COMMON_CLKDEV |
| 360 | select ARCH_REQUIRE_GPIOLIB |
| 361 | select GENERIC_CLOCKEVENTS |
| 362 | select USB_ARCH_HAS_EHCI |
| 363 | help |
| 364 | Support for systems based on the Freescale 3xxx CPUs. |
| 365 | |
| 366 | config ARCH_NETX |
| 367 | bool "Hilscher NetX based" |
| 368 | select CPU_ARM926T |
| 369 | select ARM_VIC |
| 370 | select GENERIC_CLOCKEVENTS |
| 371 | help |
| 372 | This enables support for systems based on the Hilscher NetX Soc |
| 373 | |
| 374 | config ARCH_H720X |
| 375 | bool "Hynix HMS720x-based" |
| 376 | select CPU_ARM720T |
| 377 | select ISA_DMA_API |
| 378 | select ARCH_USES_GETTIMEOFFSET |
| 379 | help |
| 380 | This enables support for systems based on the Hynix HMS720x |
| 381 | |
| 382 | config ARCH_IOP13XX |
| 383 | bool "IOP13xx-based" |
| 384 | depends on MMU |
| 385 | select CPU_XSC3 |
| 386 | select PLAT_IOP |
| 387 | select PCI |
| 388 | select ARCH_SUPPORTS_MSI |
| 389 | select VMSPLIT_1G |
| 390 | help |
| 391 | Support for Intel's IOP13XX (XScale) family of processors. |
| 392 | |
| 393 | config ARCH_IOP32X |
| 394 | bool "IOP32x-based" |
| 395 | depends on MMU |
| 396 | select CPU_XSCALE |
| 397 | select PLAT_IOP |
| 398 | select PCI |
| 399 | select ARCH_REQUIRE_GPIOLIB |
| 400 | help |
| 401 | Support for Intel's 80219 and IOP32X (XScale) family of |
| 402 | processors. |
| 403 | |
| 404 | config ARCH_IOP33X |
| 405 | bool "IOP33x-based" |
| 406 | depends on MMU |
| 407 | select CPU_XSCALE |
| 408 | select PLAT_IOP |
| 409 | select PCI |
| 410 | select ARCH_REQUIRE_GPIOLIB |
| 411 | help |
| 412 | Support for Intel's IOP33X (XScale) family of processors. |
| 413 | |
| 414 | config ARCH_IXP23XX |
| 415 | bool "IXP23XX-based" |
| 416 | depends on MMU |
| 417 | select CPU_XSC3 |
| 418 | select PCI |
| 419 | select ARCH_USES_GETTIMEOFFSET |
| 420 | help |
| 421 | Support for Intel's IXP23xx (XScale) family of processors. |
| 422 | |
| 423 | config ARCH_IXP2000 |
| 424 | bool "IXP2400/2800-based" |
| 425 | depends on MMU |
| 426 | select CPU_XSCALE |
| 427 | select PCI |
| 428 | select ARCH_USES_GETTIMEOFFSET |
| 429 | help |
| 430 | Support for Intel's IXP2400/2800 (XScale) family of processors. |
| 431 | |
| 432 | config ARCH_IXP4XX |
| 433 | bool "IXP4xx-based" |
| 434 | depends on MMU |
| 435 | select CPU_XSCALE |
| 436 | select GENERIC_GPIO |
| 437 | select GENERIC_CLOCKEVENTS |
| 438 | select DMABOUNCE if PCI |
| 439 | help |
| 440 | Support for Intel's IXP4XX (XScale) family of processors. |
| 441 | |
| 442 | config ARCH_L7200 |
| 443 | bool "LinkUp-L7200" |
| 444 | select CPU_ARM720T |
| 445 | select FIQ |
| 446 | select ARCH_USES_GETTIMEOFFSET |
| 447 | help |
| 448 | Say Y here if you intend to run this kernel on a LinkUp Systems |
| 449 | L7200 Software Development Board which uses an ARM720T processor. |
| 450 | Information on this board can be obtained at: |
| 451 | |
| 452 | <http://www.linkupsys.com/> |
| 453 | |
| 454 | If you have any questions or comments about the Linux kernel port |
| 455 | to this board, send e-mail to <sjhill@cotw.com>. |
| 456 | |
| 457 | config ARCH_DOVE |
| 458 | bool "Marvell Dove" |
| 459 | select PCI |
| 460 | select ARCH_REQUIRE_GPIOLIB |
| 461 | select GENERIC_CLOCKEVENTS |
| 462 | select PLAT_ORION |
| 463 | help |
| 464 | Support for the Marvell Dove SoC 88AP510 |
| 465 | |
| 466 | config ARCH_KIRKWOOD |
| 467 | bool "Marvell Kirkwood" |
| 468 | select CPU_FEROCEON |
| 469 | select PCI |
| 470 | select ARCH_REQUIRE_GPIOLIB |
| 471 | select GENERIC_CLOCKEVENTS |
| 472 | select PLAT_ORION |
| 473 | help |
| 474 | Support for the following Marvell Kirkwood series SoCs: |
| 475 | 88F6180, 88F6192 and 88F6281. |
| 476 | |
| 477 | config ARCH_LOKI |
| 478 | bool "Marvell Loki (88RC8480)" |
| 479 | select CPU_FEROCEON |
| 480 | select GENERIC_CLOCKEVENTS |
| 481 | select PLAT_ORION |
| 482 | help |
| 483 | Support for the Marvell Loki (88RC8480) SoC. |
| 484 | |
| 485 | config ARCH_MV78XX0 |
| 486 | bool "Marvell MV78xx0" |
| 487 | select CPU_FEROCEON |
| 488 | select PCI |
| 489 | select ARCH_REQUIRE_GPIOLIB |
| 490 | select GENERIC_CLOCKEVENTS |
| 491 | select PLAT_ORION |
| 492 | help |
| 493 | Support for the following Marvell MV78xx0 series SoCs: |
| 494 | MV781x0, MV782x0. |
| 495 | |
| 496 | config ARCH_ORION5X |
| 497 | bool "Marvell Orion" |
| 498 | depends on MMU |
| 499 | select CPU_FEROCEON |
| 500 | select PCI |
| 501 | select ARCH_REQUIRE_GPIOLIB |
| 502 | select GENERIC_CLOCKEVENTS |
| 503 | select PLAT_ORION |
| 504 | help |
| 505 | Support for the following Marvell Orion 5x series SoCs: |
| 506 | Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), |
| 507 | Orion-2 (5281), Orion-1-90 (6183). |
| 508 | |
| 509 | config ARCH_MMP |
| 510 | bool "Marvell PXA168/910/MMP2" |
| 511 | depends on MMU |
| 512 | select ARCH_REQUIRE_GPIOLIB |
| 513 | select COMMON_CLKDEV |
| 514 | select GENERIC_CLOCKEVENTS |
| 515 | select TICK_ONESHOT |
| 516 | select PLAT_PXA |
| 517 | help |
| 518 | Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. |
| 519 | |
| 520 | config ARCH_KS8695 |
| 521 | bool "Micrel/Kendin KS8695" |
| 522 | select CPU_ARM922T |
| 523 | select ARCH_REQUIRE_GPIOLIB |
| 524 | select ARCH_USES_GETTIMEOFFSET |
| 525 | help |
| 526 | Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based |
| 527 | System-on-Chip devices. |
| 528 | |
| 529 | config ARCH_NS9XXX |
| 530 | bool "NetSilicon NS9xxx" |
| 531 | select CPU_ARM926T |
| 532 | select GENERIC_GPIO |
| 533 | select GENERIC_CLOCKEVENTS |
| 534 | select HAVE_CLK |
| 535 | help |
| 536 | Say Y here if you intend to run this kernel on a NetSilicon NS9xxx |
| 537 | System. |
| 538 | |
| 539 | <http://www.digi.com/products/microprocessors/index.jsp> |
| 540 | |
| 541 | config ARCH_W90X900 |
| 542 | bool "Nuvoton W90X900 CPU" |
| 543 | select CPU_ARM926T |
| 544 | select ARCH_REQUIRE_GPIOLIB |
| 545 | select COMMON_CLKDEV |
| 546 | select GENERIC_CLOCKEVENTS |
| 547 | help |
| 548 | Support for Nuvoton (Winbond logic dept.) ARM9 processor, |
| 549 | At present, the w90x900 has been renamed nuc900, regarding |
| 550 | the ARM series product line, you can login the following |
| 551 | link address to know more. |
| 552 | |
| 553 | <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ |
| 554 | ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> |
| 555 | |
| 556 | config ARCH_NUC93X |
| 557 | bool "Nuvoton NUC93X CPU" |
| 558 | select CPU_ARM926T |
| 559 | select COMMON_CLKDEV |
| 560 | help |
| 561 | Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a |
| 562 | low-power and high performance MPEG-4/JPEG multimedia controller chip. |
| 563 | |
| 564 | config ARCH_PNX4008 |
| 565 | bool "Philips Nexperia PNX4008 Mobile" |
| 566 | select CPU_ARM926T |
| 567 | select COMMON_CLKDEV |
| 568 | select ARCH_USES_GETTIMEOFFSET |
| 569 | help |
| 570 | This enables support for Philips PNX4008 mobile platform. |
| 571 | |
| 572 | config ARCH_PXA |
| 573 | bool "PXA2xx/PXA3xx-based" |
| 574 | depends on MMU |
| 575 | select ARCH_MTD_XIP |
| 576 | select ARCH_HAS_CPUFREQ |
| 577 | select COMMON_CLKDEV |
| 578 | select ARCH_REQUIRE_GPIOLIB |
| 579 | select GENERIC_CLOCKEVENTS |
| 580 | select TICK_ONESHOT |
| 581 | select PLAT_PXA |
| 582 | help |
| 583 | Support for Intel/Marvell's PXA2xx/PXA3xx processor line. |
| 584 | |
| 585 | config ARCH_MSM |
| 586 | bool "Qualcomm MSM" |
| 587 | select HAVE_CLK |
| 588 | select GENERIC_CLOCKEVENTS |
| 589 | help |
| 590 | Support for Qualcomm MSM/QSD based systems. This runs on the |
| 591 | apps processor of the MSM/QSD and depends on a shared memory |
| 592 | interface to the modem processor which runs the baseband |
| 593 | stack and controls some vital subsystems |
| 594 | (clock and power control, etc). |
| 595 | |
| 596 | config ARCH_SHMOBILE |
| 597 | bool "Renesas SH-Mobile" |
| 598 | help |
| 599 | Support for Renesas's SH-Mobile ARM platforms |
| 600 | |
| 601 | config ARCH_RPC |
| 602 | bool "RiscPC" |
| 603 | select ARCH_ACORN |
| 604 | select FIQ |
| 605 | select TIMER_ACORN |
| 606 | select ARCH_MAY_HAVE_PC_FDC |
| 607 | select HAVE_PATA_PLATFORM |
| 608 | select ISA_DMA_API |
| 609 | select NO_IOPORT |
| 610 | select ARCH_SPARSEMEM_ENABLE |
| 611 | select ARCH_USES_GETTIMEOFFSET |
| 612 | help |
| 613 | On the Acorn Risc-PC, Linux can support the internal IDE disk and |
| 614 | CD-ROM interface, serial and parallel port, and the floppy drive. |
| 615 | |
| 616 | config ARCH_SA1100 |
| 617 | bool "SA1100-based" |
| 618 | select CPU_SA1100 |
| 619 | select ISA |
| 620 | select ARCH_SPARSEMEM_ENABLE |
| 621 | select ARCH_MTD_XIP |
| 622 | select ARCH_HAS_CPUFREQ |
| 623 | select CPU_FREQ |
| 624 | select GENERIC_CLOCKEVENTS |
| 625 | select HAVE_CLK |
| 626 | select TICK_ONESHOT |
| 627 | select ARCH_REQUIRE_GPIOLIB |
| 628 | help |
| 629 | Support for StrongARM 11x0 based boards. |
| 630 | |
| 631 | config ARCH_S3C2410 |
| 632 | bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450" |
| 633 | select GENERIC_GPIO |
| 634 | select ARCH_HAS_CPUFREQ |
| 635 | select HAVE_CLK |
| 636 | select ARCH_USES_GETTIMEOFFSET |
| 637 | help |
| 638 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics |
| 639 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or |
| 640 | the Samsung SMDK2410 development board (and derivatives). |
| 641 | |
| 642 | Note, the S3C2416 and the S3C2450 are so close that they even share |
| 643 | the same SoC ID code. This means that there is no seperate machine |
| 644 | directory (no arch/arm/mach-s3c2450) as the S3C2416 was first. |
| 645 | |
| 646 | config ARCH_S3C64XX |
| 647 | bool "Samsung S3C64XX" |
| 648 | select PLAT_SAMSUNG |
| 649 | select CPU_V6 |
| 650 | select ARM_VIC |
| 651 | select HAVE_CLK |
| 652 | select NO_IOPORT |
| 653 | select ARCH_USES_GETTIMEOFFSET |
| 654 | select ARCH_HAS_CPUFREQ |
| 655 | select ARCH_REQUIRE_GPIOLIB |
| 656 | select SAMSUNG_CLKSRC |
| 657 | select SAMSUNG_IRQ_VIC_TIMER |
| 658 | select SAMSUNG_IRQ_UART |
| 659 | select S3C_GPIO_TRACK |
| 660 | select S3C_GPIO_PULL_UPDOWN |
| 661 | select S3C_GPIO_CFG_S3C24XX |
| 662 | select S3C_GPIO_CFG_S3C64XX |
| 663 | select S3C_DEV_NAND |
| 664 | select USB_ARCH_HAS_OHCI |
| 665 | select SAMSUNG_GPIOLIB_4BIT |
| 666 | help |
| 667 | Samsung S3C64XX series based systems |
| 668 | |
| 669 | config ARCH_S5P6440 |
| 670 | bool "Samsung S5P6440" |
| 671 | select CPU_V6 |
| 672 | select GENERIC_GPIO |
| 673 | select HAVE_CLK |
| 674 | select ARCH_USES_GETTIMEOFFSET |
| 675 | help |
| 676 | Samsung S5P6440 CPU based systems |
| 677 | |
| 678 | config ARCH_S5P6442 |
| 679 | bool "Samsung S5P6442" |
| 680 | select CPU_V6 |
| 681 | select GENERIC_GPIO |
| 682 | select HAVE_CLK |
| 683 | select ARCH_USES_GETTIMEOFFSET |
| 684 | help |
| 685 | Samsung S5P6442 CPU based systems |
| 686 | |
| 687 | config ARCH_S5PC100 |
| 688 | bool "Samsung S5PC100" |
| 689 | select GENERIC_GPIO |
| 690 | select HAVE_CLK |
| 691 | select CPU_V7 |
| 692 | select ARM_L1_CACHE_SHIFT_6 |
| 693 | select ARCH_USES_GETTIMEOFFSET |
| 694 | help |
| 695 | Samsung S5PC100 series based systems |
| 696 | |
| 697 | config ARCH_S5PV210 |
| 698 | bool "Samsung S5PV210/S5PC110" |
| 699 | select CPU_V7 |
| 700 | select GENERIC_GPIO |
| 701 | select HAVE_CLK |
| 702 | select ARM_L1_CACHE_SHIFT_6 |
| 703 | select ARCH_USES_GETTIMEOFFSET |
| 704 | help |
| 705 | Samsung S5PV210/S5PC110 series based systems |
| 706 | |
| 707 | config ARCH_SHARK |
| 708 | bool "Shark" |
| 709 | select CPU_SA110 |
| 710 | select ISA |
| 711 | select ISA_DMA |
| 712 | select ZONE_DMA |
| 713 | select PCI |
| 714 | select ARCH_USES_GETTIMEOFFSET |
| 715 | help |
| 716 | Support for the StrongARM based Digital DNARD machine, also known |
| 717 | as "Shark" (<http://www.shark-linux.de/shark.html>). |
| 718 | |
| 719 | config ARCH_LH7A40X |
| 720 | bool "Sharp LH7A40X" |
| 721 | select CPU_ARM922T |
| 722 | select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM |
| 723 | select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM |
| 724 | select ARCH_USES_GETTIMEOFFSET |
| 725 | help |
| 726 | Say Y here for systems based on one of the Sharp LH7A40X |
| 727 | System on a Chip processors. These CPUs include an ARM922T |
| 728 | core with a wide array of integrated devices for |
| 729 | hand-held and low-power applications. |
| 730 | |
| 731 | config ARCH_U300 |
| 732 | bool "ST-Ericsson U300 Series" |
| 733 | depends on MMU |
| 734 | select CPU_ARM926T |
| 735 | select HAVE_TCM |
| 736 | select ARM_AMBA |
| 737 | select ARM_VIC |
| 738 | select GENERIC_CLOCKEVENTS |
| 739 | select COMMON_CLKDEV |
| 740 | select GENERIC_GPIO |
| 741 | help |
| 742 | Support for ST-Ericsson U300 series mobile platforms. |
| 743 | |
| 744 | config ARCH_U8500 |
| 745 | bool "ST-Ericsson U8500 Series" |
| 746 | select CPU_V7 |
| 747 | select ARM_AMBA |
| 748 | select GENERIC_CLOCKEVENTS |
| 749 | select COMMON_CLKDEV |
| 750 | select ARCH_REQUIRE_GPIOLIB |
| 751 | help |
| 752 | Support for ST-Ericsson's Ux500 architecture |
| 753 | |
| 754 | config ARCH_NOMADIK |
| 755 | bool "STMicroelectronics Nomadik" |
| 756 | select ARM_AMBA |
| 757 | select ARM_VIC |
| 758 | select CPU_ARM926T |
| 759 | select COMMON_CLKDEV |
| 760 | select GENERIC_CLOCKEVENTS |
| 761 | select ARCH_REQUIRE_GPIOLIB |
| 762 | help |
| 763 | Support for the Nomadik platform by ST-Ericsson |
| 764 | |
| 765 | config ARCH_DAVINCI |
| 766 | bool "TI DaVinci" |
| 767 | select GENERIC_CLOCKEVENTS |
| 768 | select ARCH_REQUIRE_GPIOLIB |
| 769 | select ZONE_DMA |
| 770 | select HAVE_IDE |
| 771 | select COMMON_CLKDEV |
| 772 | select GENERIC_ALLOCATOR |
| 773 | select ARCH_HAS_HOLES_MEMORYMODEL |
| 774 | help |
| 775 | Support for TI's DaVinci platform. |
| 776 | |
| 777 | config ARCH_OMAP |
| 778 | bool "TI OMAP" |
| 779 | select HAVE_CLK |
| 780 | select ARCH_REQUIRE_GPIOLIB |
| 781 | select ARCH_HAS_CPUFREQ |
| 782 | select GENERIC_CLOCKEVENTS |
| 783 | select ARCH_HAS_HOLES_MEMORYMODEL |
| 784 | help |
| 785 | Support for TI's OMAP platform (OMAP1 and OMAP2). |
| 786 | |
| 787 | config PLAT_SPEAR |
| 788 | bool "ST SPEAr" |
| 789 | select ARM_AMBA |
| 790 | select ARCH_REQUIRE_GPIOLIB |
| 791 | select COMMON_CLKDEV |
| 792 | select GENERIC_CLOCKEVENTS |
| 793 | select HAVE_CLK |
| 794 | help |
| 795 | Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx). |
| 796 | |
| 797 | endchoice |
| 798 | |
| 799 | # |
| 800 | # This is sorted alphabetically by mach-* pathname. However, plat-* |
| 801 | # Kconfigs may be included either alphabetically (according to the |
| 802 | # plat- suffix) or along side the corresponding mach-* source. |
| 803 | # |
| 804 | source "arch/arm/mach-aaec2000/Kconfig" |
| 805 | |
| 806 | source "arch/arm/mach-at91/Kconfig" |
| 807 | |
| 808 | source "arch/arm/mach-bcmring/Kconfig" |
| 809 | |
| 810 | source "arch/arm/mach-clps711x/Kconfig" |
| 811 | |
| 812 | source "arch/arm/mach-cns3xxx/Kconfig" |
| 813 | |
| 814 | source "arch/arm/mach-davinci/Kconfig" |
| 815 | |
| 816 | source "arch/arm/mach-dove/Kconfig" |
| 817 | |
| 818 | source "arch/arm/mach-ep93xx/Kconfig" |
| 819 | |
| 820 | source "arch/arm/mach-footbridge/Kconfig" |
| 821 | |
| 822 | source "arch/arm/mach-gemini/Kconfig" |
| 823 | |
| 824 | source "arch/arm/mach-h720x/Kconfig" |
| 825 | |
| 826 | source "arch/arm/mach-integrator/Kconfig" |
| 827 | |
| 828 | source "arch/arm/mach-iop32x/Kconfig" |
| 829 | |
| 830 | source "arch/arm/mach-iop33x/Kconfig" |
| 831 | |
| 832 | source "arch/arm/mach-iop13xx/Kconfig" |
| 833 | |
| 834 | source "arch/arm/mach-ixp4xx/Kconfig" |
| 835 | |
| 836 | source "arch/arm/mach-ixp2000/Kconfig" |
| 837 | |
| 838 | source "arch/arm/mach-ixp23xx/Kconfig" |
| 839 | |
| 840 | source "arch/arm/mach-kirkwood/Kconfig" |
| 841 | |
| 842 | source "arch/arm/mach-ks8695/Kconfig" |
| 843 | |
| 844 | source "arch/arm/mach-lh7a40x/Kconfig" |
| 845 | |
| 846 | source "arch/arm/mach-loki/Kconfig" |
| 847 | |
| 848 | source "arch/arm/mach-msm/Kconfig" |
| 849 | |
| 850 | source "arch/arm/mach-mv78xx0/Kconfig" |
| 851 | |
| 852 | source "arch/arm/plat-mxc/Kconfig" |
| 853 | |
| 854 | source "arch/arm/mach-netx/Kconfig" |
| 855 | |
| 856 | source "arch/arm/mach-nomadik/Kconfig" |
| 857 | source "arch/arm/plat-nomadik/Kconfig" |
| 858 | |
| 859 | source "arch/arm/mach-ns9xxx/Kconfig" |
| 860 | |
| 861 | source "arch/arm/mach-nuc93x/Kconfig" |
| 862 | |
| 863 | source "arch/arm/plat-omap/Kconfig" |
| 864 | |
| 865 | source "arch/arm/mach-omap1/Kconfig" |
| 866 | |
| 867 | source "arch/arm/mach-omap2/Kconfig" |
| 868 | |
| 869 | source "arch/arm/mach-orion5x/Kconfig" |
| 870 | |
| 871 | source "arch/arm/mach-pxa/Kconfig" |
| 872 | source "arch/arm/plat-pxa/Kconfig" |
| 873 | |
| 874 | source "arch/arm/mach-mmp/Kconfig" |
| 875 | |
| 876 | source "arch/arm/mach-realview/Kconfig" |
| 877 | |
| 878 | source "arch/arm/mach-sa1100/Kconfig" |
| 879 | |
| 880 | source "arch/arm/plat-samsung/Kconfig" |
| 881 | source "arch/arm/plat-s3c24xx/Kconfig" |
| 882 | source "arch/arm/plat-s5p/Kconfig" |
| 883 | |
| 884 | source "arch/arm/plat-spear/Kconfig" |
| 885 | |
| 886 | if ARCH_S3C2410 |
| 887 | source "arch/arm/mach-s3c2400/Kconfig" |
| 888 | source "arch/arm/mach-s3c2410/Kconfig" |
| 889 | source "arch/arm/mach-s3c2412/Kconfig" |
| 890 | source "arch/arm/mach-s3c2416/Kconfig" |
| 891 | source "arch/arm/mach-s3c2440/Kconfig" |
| 892 | source "arch/arm/mach-s3c2443/Kconfig" |
| 893 | endif |
| 894 | |
| 895 | if ARCH_S3C64XX |
| 896 | source "arch/arm/mach-s3c64xx/Kconfig" |
| 897 | endif |
| 898 | |
| 899 | source "arch/arm/mach-s5p6440/Kconfig" |
| 900 | |
| 901 | source "arch/arm/mach-s5p6442/Kconfig" |
| 902 | |
| 903 | source "arch/arm/mach-s5pc100/Kconfig" |
| 904 | |
| 905 | source "arch/arm/mach-s5pv210/Kconfig" |
| 906 | |
| 907 | source "arch/arm/mach-shmobile/Kconfig" |
| 908 | |
| 909 | source "arch/arm/plat-stmp3xxx/Kconfig" |
| 910 | |
| 911 | source "arch/arm/mach-u300/Kconfig" |
| 912 | |
| 913 | source "arch/arm/mach-ux500/Kconfig" |
| 914 | |
| 915 | source "arch/arm/mach-versatile/Kconfig" |
| 916 | |
| 917 | source "arch/arm/mach-vexpress/Kconfig" |
| 918 | |
| 919 | source "arch/arm/mach-w90x900/Kconfig" |
| 920 | |
| 921 | # Definitions to make life easier |
| 922 | config ARCH_ACORN |
| 923 | bool |
| 924 | |
| 925 | config PLAT_IOP |
| 926 | bool |
| 927 | select GENERIC_CLOCKEVENTS |
| 928 | |
| 929 | config PLAT_ORION |
| 930 | bool |
| 931 | |
| 932 | config PLAT_PXA |
| 933 | bool |
| 934 | |
| 935 | config PLAT_VERSATILE |
| 936 | bool |
| 937 | |
| 938 | config ARM_TIMER_SP804 |
| 939 | bool |
| 940 | |
| 941 | source arch/arm/mm/Kconfig |
| 942 | |
| 943 | config IWMMXT |
| 944 | bool "Enable iWMMXt support" |
| 945 | depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK |
| 946 | default y if PXA27x || PXA3xx || ARCH_MMP |
| 947 | help |
| 948 | Enable support for iWMMXt context switching at run time if |
| 949 | running on a CPU that supports it. |
| 950 | |
| 951 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER |
| 952 | config XSCALE_PMU |
| 953 | bool |
| 954 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER |
| 955 | default y |
| 956 | |
| 957 | config CPU_HAS_PMU |
| 958 | depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \ |
| 959 | (!ARCH_OMAP3 || OMAP3_EMU) |
| 960 | default y |
| 961 | bool |
| 962 | |
| 963 | if !MMU |
| 964 | source "arch/arm/Kconfig-nommu" |
| 965 | endif |
| 966 | |
| 967 | config ARM_ERRATA_411920 |
| 968 | bool "ARM errata: Invalidation of the Instruction Cache operation can fail" |
| 969 | depends on CPU_V6 && !SMP |
| 970 | help |
| 971 | Invalidation of the Instruction Cache operation can |
| 972 | fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. |
| 973 | It does not affect the MPCore. This option enables the ARM Ltd. |
| 974 | recommended workaround. |
| 975 | |
| 976 | config ARM_ERRATA_430973 |
| 977 | bool "ARM errata: Stale prediction on replaced interworking branch" |
| 978 | depends on CPU_V7 |
| 979 | help |
| 980 | This option enables the workaround for the 430973 Cortex-A8 |
| 981 | (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb |
| 982 | interworking branch is replaced with another code sequence at the |
| 983 | same virtual address, whether due to self-modifying code or virtual |
| 984 | to physical address re-mapping, Cortex-A8 does not recover from the |
| 985 | stale interworking branch prediction. This results in Cortex-A8 |
| 986 | executing the new code sequence in the incorrect ARM or Thumb state. |
| 987 | The workaround enables the BTB/BTAC operations by setting ACTLR.IBE |
| 988 | and also flushes the branch target cache at every context switch. |
| 989 | Note that setting specific bits in the ACTLR register may not be |
| 990 | available in non-secure mode. |
| 991 | |
| 992 | config ARM_ERRATA_458693 |
| 993 | bool "ARM errata: Processor deadlock when a false hazard is created" |
| 994 | depends on CPU_V7 |
| 995 | help |
| 996 | This option enables the workaround for the 458693 Cortex-A8 (r2p0) |
| 997 | erratum. For very specific sequences of memory operations, it is |
| 998 | possible for a hazard condition intended for a cache line to instead |
| 999 | be incorrectly associated with a different cache line. This false |
| 1000 | hazard might then cause a processor deadlock. The workaround enables |
| 1001 | the L1 caching of the NEON accesses and disables the PLD instruction |
| 1002 | in the ACTLR register. Note that setting specific bits in the ACTLR |
| 1003 | register may not be available in non-secure mode. |
| 1004 | |
| 1005 | config ARM_ERRATA_460075 |
| 1006 | bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" |
| 1007 | depends on CPU_V7 |
| 1008 | help |
| 1009 | This option enables the workaround for the 460075 Cortex-A8 (r2p0) |
| 1010 | erratum. Any asynchronous access to the L2 cache may encounter a |
| 1011 | situation in which recent store transactions to the L2 cache are lost |
| 1012 | and overwritten with stale memory contents from external memory. The |
| 1013 | workaround disables the write-allocate mode for the L2 cache via the |
| 1014 | ACTLR register. Note that setting specific bits in the ACTLR register |
| 1015 | may not be available in non-secure mode. |
| 1016 | |
| 1017 | config PL310_ERRATA_588369 |
| 1018 | bool "Clean & Invalidate maintenance operations do not invalidate clean lines" |
| 1019 | depends on CACHE_L2X0 && ARCH_OMAP4 |
| 1020 | help |
| 1021 | The PL310 L2 cache controller implements three types of Clean & |
| 1022 | Invalidate maintenance operations: by Physical Address |
| 1023 | (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC). |
| 1024 | They are architecturally defined to behave as the execution of a |
| 1025 | clean operation followed immediately by an invalidate operation, |
| 1026 | both performing to the same memory location. This functionality |
| 1027 | is not correctly implemented in PL310 as clean lines are not |
| 1028 | invalidated as a result of these operations. Note that this errata |
| 1029 | uses Texas Instrument's secure monitor api. |
| 1030 | endmenu |
| 1031 | |
| 1032 | source "arch/arm/common/Kconfig" |
| 1033 | |
| 1034 | config FORCE_MAX_ZONEORDER |
| 1035 | int |
| 1036 | depends on SA1111 |
| 1037 | default "9" |
| 1038 | |
| 1039 | menu "Bus support" |
| 1040 | |
| 1041 | config ARM_AMBA |
| 1042 | bool |
| 1043 | |
| 1044 | config ISA |
| 1045 | bool |
| 1046 | help |
| 1047 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 1048 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 1049 | inside your box. Other bus systems are PCI, EISA, MicroChannel |
| 1050 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; |
| 1051 | newer boards don't support it. If you have ISA, say Y, otherwise N. |
| 1052 | |
| 1053 | # Select ISA DMA controller support |
| 1054 | config ISA_DMA |
| 1055 | bool |
| 1056 | select ISA_DMA_API |
| 1057 | |
| 1058 | # Select ISA DMA interface |
| 1059 | config ISA_DMA_API |
| 1060 | bool |
| 1061 | |
| 1062 | config PCI |
| 1063 | bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE |
| 1064 | help |
| 1065 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 1066 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 1067 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 1068 | VESA. If you have PCI, say Y, otherwise N. |
| 1069 | |
| 1070 | config PCI_DOMAINS |
| 1071 | bool |
| 1072 | depends on PCI |
| 1073 | |
| 1074 | config PCI_SYSCALL |
| 1075 | def_bool PCI |
| 1076 | |
| 1077 | # Select the host bridge type |
| 1078 | config PCI_HOST_VIA82C505 |
| 1079 | bool |
| 1080 | depends on PCI && ARCH_SHARK |
| 1081 | default y |
| 1082 | |
| 1083 | config PCI_HOST_ITE8152 |
| 1084 | bool |
| 1085 | depends on PCI && MACH_ARMCORE |
| 1086 | default y |
| 1087 | select DMABOUNCE |
| 1088 | |
| 1089 | source "drivers/pci/Kconfig" |
| 1090 | |
| 1091 | source "drivers/pcmcia/Kconfig" |
| 1092 | |
| 1093 | endmenu |
| 1094 | |
| 1095 | menu "Kernel Features" |
| 1096 | |
| 1097 | source "kernel/time/Kconfig" |
| 1098 | |
| 1099 | config SMP |
| 1100 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" |
| 1101 | depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\ |
| 1102 | MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\ |
| 1103 | ARCH_U8500 || ARCH_VEXPRESS_CA9X4) |
| 1104 | depends on GENERIC_CLOCKEVENTS |
| 1105 | select USE_GENERIC_SMP_HELPERS |
| 1106 | select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4) |
| 1107 | help |
| 1108 | This enables support for systems with more than one CPU. If you have |
| 1109 | a system with only one CPU, like most personal computers, say N. If |
| 1110 | you have a system with more than one CPU, say Y. |
| 1111 | |
| 1112 | If you say N here, the kernel will run on single and multiprocessor |
| 1113 | machines, but will use only one CPU of a multiprocessor machine. If |
| 1114 | you say Y here, the kernel will run on many, but not all, single |
| 1115 | processor machines. On a single processor machine, the kernel will |
| 1116 | run faster if you say N here. |
| 1117 | |
| 1118 | See also <file:Documentation/i386/IO-APIC.txt>, |
| 1119 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
| 1120 | <http://www.linuxdoc.org/docs.html#howto>. |
| 1121 | |
| 1122 | If you don't know what to do here, say N. |
| 1123 | |
| 1124 | config HAVE_ARM_SCU |
| 1125 | bool |
| 1126 | depends on SMP |
| 1127 | help |
| 1128 | This option enables support for the ARM system coherency unit |
| 1129 | |
| 1130 | config HAVE_ARM_TWD |
| 1131 | bool |
| 1132 | depends on SMP |
| 1133 | help |
| 1134 | This options enables support for the ARM timer and watchdog unit |
| 1135 | |
| 1136 | choice |
| 1137 | prompt "Memory split" |
| 1138 | default VMSPLIT_3G |
| 1139 | help |
| 1140 | Select the desired split between kernel and user memory. |
| 1141 | |
| 1142 | If you are not absolutely sure what you are doing, leave this |
| 1143 | option alone! |
| 1144 | |
| 1145 | config VMSPLIT_3G |
| 1146 | bool "3G/1G user/kernel split" |
| 1147 | config VMSPLIT_2G |
| 1148 | bool "2G/2G user/kernel split" |
| 1149 | config VMSPLIT_1G |
| 1150 | bool "1G/3G user/kernel split" |
| 1151 | endchoice |
| 1152 | |
| 1153 | config PAGE_OFFSET |
| 1154 | hex |
| 1155 | default 0x40000000 if VMSPLIT_1G |
| 1156 | default 0x80000000 if VMSPLIT_2G |
| 1157 | default 0xC0000000 |
| 1158 | |
| 1159 | config NR_CPUS |
| 1160 | int "Maximum number of CPUs (2-32)" |
| 1161 | range 2 32 |
| 1162 | depends on SMP |
| 1163 | default "4" |
| 1164 | |
| 1165 | config HOTPLUG_CPU |
| 1166 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" |
| 1167 | depends on SMP && HOTPLUG && EXPERIMENTAL |
| 1168 | help |
| 1169 | Say Y here to experiment with turning CPUs off and on. CPUs |
| 1170 | can be controlled through /sys/devices/system/cpu. |
| 1171 | |
| 1172 | config LOCAL_TIMERS |
| 1173 | bool "Use local timer interrupts" |
| 1174 | depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \ |
| 1175 | REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500) |
| 1176 | default y |
| 1177 | select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500) |
| 1178 | help |
| 1179 | Enable support for local timers on SMP platforms, rather then the |
| 1180 | legacy IPI broadcast method. Local timers allows the system |
| 1181 | accounting to be spread across the timer interval, preventing a |
| 1182 | "thundering herd" at every timer tick. |
| 1183 | |
| 1184 | source kernel/Kconfig.preempt |
| 1185 | |
| 1186 | config HZ |
| 1187 | int |
| 1188 | default 128 if ARCH_L7200 |
| 1189 | default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210 |
| 1190 | default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER |
| 1191 | default AT91_TIMER_HZ if ARCH_AT91 |
| 1192 | default 100 |
| 1193 | |
| 1194 | config THUMB2_KERNEL |
| 1195 | bool "Compile the kernel in Thumb-2 mode" |
| 1196 | depends on CPU_V7 && EXPERIMENTAL |
| 1197 | select AEABI |
| 1198 | select ARM_ASM_UNIFIED |
| 1199 | help |
| 1200 | By enabling this option, the kernel will be compiled in |
| 1201 | Thumb-2 mode. A compiler/assembler that understand the unified |
| 1202 | ARM-Thumb syntax is needed. |
| 1203 | |
| 1204 | If unsure, say N. |
| 1205 | |
| 1206 | config ARM_ASM_UNIFIED |
| 1207 | bool |
| 1208 | |
| 1209 | config AEABI |
| 1210 | bool "Use the ARM EABI to compile the kernel" |
| 1211 | help |
| 1212 | This option allows for the kernel to be compiled using the latest |
| 1213 | ARM ABI (aka EABI). This is only useful if you are using a user |
| 1214 | space environment that is also compiled with EABI. |
| 1215 | |
| 1216 | Since there are major incompatibilities between the legacy ABI and |
| 1217 | EABI, especially with regard to structure member alignment, this |
| 1218 | option also changes the kernel syscall calling convention to |
| 1219 | disambiguate both ABIs and allow for backward compatibility support |
| 1220 | (selected with CONFIG_OABI_COMPAT). |
| 1221 | |
| 1222 | To use this you need GCC version 4.0.0 or later. |
| 1223 | |
| 1224 | config OABI_COMPAT |
| 1225 | bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" |
| 1226 | depends on AEABI && EXPERIMENTAL |
| 1227 | default y |
| 1228 | help |
| 1229 | This option preserves the old syscall interface along with the |
| 1230 | new (ARM EABI) one. It also provides a compatibility layer to |
| 1231 | intercept syscalls that have structure arguments which layout |
| 1232 | in memory differs between the legacy ABI and the new ARM EABI |
| 1233 | (only for non "thumb" binaries). This option adds a tiny |
| 1234 | overhead to all syscalls and produces a slightly larger kernel. |
| 1235 | If you know you'll be using only pure EABI user space then you |
| 1236 | can say N here. If this option is not selected and you attempt |
| 1237 | to execute a legacy ABI binary then the result will be |
| 1238 | UNPREDICTABLE (in fact it can be predicted that it won't work |
| 1239 | at all). If in doubt say Y. |
| 1240 | |
| 1241 | config ARCH_HAS_HOLES_MEMORYMODEL |
| 1242 | bool |
| 1243 | |
| 1244 | # Discontigmem is deprecated |
| 1245 | config ARCH_DISCONTIGMEM_ENABLE |
| 1246 | bool |
| 1247 | |
| 1248 | config ARCH_SPARSEMEM_ENABLE |
| 1249 | bool |
| 1250 | |
| 1251 | config ARCH_SPARSEMEM_DEFAULT |
| 1252 | def_bool ARCH_SPARSEMEM_ENABLE |
| 1253 | |
| 1254 | config ARCH_SELECT_MEMORY_MODEL |
| 1255 | def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE |
| 1256 | |
| 1257 | config NODES_SHIFT |
| 1258 | int |
| 1259 | default "4" if ARCH_LH7A40X |
| 1260 | default "2" |
| 1261 | depends on NEED_MULTIPLE_NODES |
| 1262 | |
| 1263 | config HIGHMEM |
| 1264 | bool "High Memory Support (EXPERIMENTAL)" |
| 1265 | depends on MMU && EXPERIMENTAL |
| 1266 | help |
| 1267 | The address space of ARM processors is only 4 Gigabytes large |
| 1268 | and it has to accommodate user address space, kernel address |
| 1269 | space as well as some memory mapped IO. That means that, if you |
| 1270 | have a large amount of physical memory and/or IO, not all of the |
| 1271 | memory can be "permanently mapped" by the kernel. The physical |
| 1272 | memory that is not permanently mapped is called "high memory". |
| 1273 | |
| 1274 | Depending on the selected kernel/user memory split, minimum |
| 1275 | vmalloc space and actual amount of RAM, you may not need this |
| 1276 | option which should result in a slightly faster kernel. |
| 1277 | |
| 1278 | If unsure, say n. |
| 1279 | |
| 1280 | config HIGHPTE |
| 1281 | bool "Allocate 2nd-level pagetables from highmem" |
| 1282 | depends on HIGHMEM |
| 1283 | depends on !OUTER_CACHE |
| 1284 | |
| 1285 | config HW_PERF_EVENTS |
| 1286 | bool "Enable hardware performance counter support for perf events" |
| 1287 | depends on PERF_EVENTS && CPU_HAS_PMU |
| 1288 | default y |
| 1289 | help |
| 1290 | Enable hardware performance counter support for perf events. If |
| 1291 | disabled, perf events will use software events only. |
| 1292 | |
| 1293 | source "mm/Kconfig" |
| 1294 | |
| 1295 | config LEDS |
| 1296 | bool "Timer and CPU usage LEDs" |
| 1297 | depends on ARCH_CDB89712 || ARCH_EBSA110 || \ |
| 1298 | ARCH_EBSA285 || ARCH_INTEGRATOR || \ |
| 1299 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ |
| 1300 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ |
| 1301 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ |
| 1302 | ARCH_AT91 || ARCH_DAVINCI || \ |
| 1303 | ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW |
| 1304 | help |
| 1305 | If you say Y here, the LEDs on your machine will be used |
| 1306 | to provide useful information about your current system status. |
| 1307 | |
| 1308 | If you are compiling a kernel for a NetWinder or EBSA-285, you will |
| 1309 | be able to select which LEDs are active using the options below. If |
| 1310 | you are compiling a kernel for the EBSA-110 or the LART however, the |
| 1311 | red LED will simply flash regularly to indicate that the system is |
| 1312 | still functional. It is safe to say Y here if you have a CATS |
| 1313 | system, but the driver will do nothing. |
| 1314 | |
| 1315 | config LEDS_TIMER |
| 1316 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ |
| 1317 | OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ |
| 1318 | || MACH_OMAP_PERSEUS2 |
| 1319 | depends on LEDS |
| 1320 | depends on !GENERIC_CLOCKEVENTS |
| 1321 | default y if ARCH_EBSA110 |
| 1322 | help |
| 1323 | If you say Y here, one of the system LEDs (the green one on the |
| 1324 | NetWinder, the amber one on the EBSA285, or the red one on the LART) |
| 1325 | will flash regularly to indicate that the system is still |
| 1326 | operational. This is mainly useful to kernel hackers who are |
| 1327 | debugging unstable kernels. |
| 1328 | |
| 1329 | The LART uses the same LED for both Timer LED and CPU usage LED |
| 1330 | functions. You may choose to use both, but the Timer LED function |
| 1331 | will overrule the CPU usage LED. |
| 1332 | |
| 1333 | config LEDS_CPU |
| 1334 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ |
| 1335 | !ARCH_OMAP) \ |
| 1336 | || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ |
| 1337 | || MACH_OMAP_PERSEUS2 |
| 1338 | depends on LEDS |
| 1339 | help |
| 1340 | If you say Y here, the red LED will be used to give a good real |
| 1341 | time indication of CPU usage, by lighting whenever the idle task |
| 1342 | is not currently executing. |
| 1343 | |
| 1344 | The LART uses the same LED for both Timer LED and CPU usage LED |
| 1345 | functions. You may choose to use both, but the Timer LED function |
| 1346 | will overrule the CPU usage LED. |
| 1347 | |
| 1348 | config ALIGNMENT_TRAP |
| 1349 | bool |
| 1350 | depends on CPU_CP15_MMU |
| 1351 | default y if !ARCH_EBSA110 |
| 1352 | select HAVE_PROC_CPU if PROC_FS |
| 1353 | help |
| 1354 | ARM processors cannot fetch/store information which is not |
| 1355 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an |
| 1356 | address divisible by 4. On 32-bit ARM processors, these non-aligned |
| 1357 | fetch/store instructions will be emulated in software if you say |
| 1358 | here, which has a severe performance impact. This is necessary for |
| 1359 | correct operation of some network protocols. With an IP-only |
| 1360 | configuration it is safe to say N, otherwise say Y. |
| 1361 | |
| 1362 | config UACCESS_WITH_MEMCPY |
| 1363 | bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)" |
| 1364 | depends on MMU && EXPERIMENTAL |
| 1365 | default y if CPU_FEROCEON |
| 1366 | help |
| 1367 | Implement faster copy_to_user and clear_user methods for CPU |
| 1368 | cores where a 8-word STM instruction give significantly higher |
| 1369 | memory write throughput than a sequence of individual 32bit stores. |
| 1370 | |
| 1371 | A possible side effect is a slight increase in scheduling latency |
| 1372 | between threads sharing the same address space if they invoke |
| 1373 | such copy operations with large buffers. |
| 1374 | |
| 1375 | However, if the CPU data cache is using a write-allocate mode, |
| 1376 | this option is unlikely to provide any performance gain. |
| 1377 | |
| 1378 | endmenu |
| 1379 | |
| 1380 | menu "Boot options" |
| 1381 | |
| 1382 | # Compressed boot loader in ROM. Yes, we really want to ask about |
| 1383 | # TEXT and BSS so we preserve their values in the config files. |
| 1384 | config ZBOOT_ROM_TEXT |
| 1385 | hex "Compressed ROM boot loader base address" |
| 1386 | default "0" |
| 1387 | help |
| 1388 | The physical address at which the ROM-able zImage is to be |
| 1389 | placed in the target. Platforms which normally make use of |
| 1390 | ROM-able zImage formats normally set this to a suitable |
| 1391 | value in their defconfig file. |
| 1392 | |
| 1393 | If ZBOOT_ROM is not enabled, this has no effect. |
| 1394 | |
| 1395 | config ZBOOT_ROM_BSS |
| 1396 | hex "Compressed ROM boot loader BSS address" |
| 1397 | default "0" |
| 1398 | help |
| 1399 | The base address of an area of read/write memory in the target |
| 1400 | for the ROM-able zImage which must be available while the |
| 1401 | decompressor is running. It must be large enough to hold the |
| 1402 | entire decompressed kernel plus an additional 128 KiB. |
| 1403 | Platforms which normally make use of ROM-able zImage formats |
| 1404 | normally set this to a suitable value in their defconfig file. |
| 1405 | |
| 1406 | If ZBOOT_ROM is not enabled, this has no effect. |
| 1407 | |
| 1408 | config ZBOOT_ROM |
| 1409 | bool "Compressed boot loader in ROM/flash" |
| 1410 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS |
| 1411 | help |
| 1412 | Say Y here if you intend to execute your compressed kernel image |
| 1413 | (zImage) directly from ROM or flash. If unsure, say N. |
| 1414 | |
| 1415 | config CMDLINE |
| 1416 | string "Default kernel command string" |
| 1417 | default "" |
| 1418 | help |
| 1419 | On some architectures (EBSA110 and CATS), there is currently no way |
| 1420 | for the boot loader to pass arguments to the kernel. For these |
| 1421 | architectures, you should supply some command-line options at build |
| 1422 | time by entering them here. As a minimum, you should specify the |
| 1423 | memory size and the root device (e.g., mem=64M root=/dev/nfs). |
| 1424 | |
| 1425 | config CMDLINE_FORCE |
| 1426 | bool "Always use the default kernel command string" |
| 1427 | depends on CMDLINE != "" |
| 1428 | help |
| 1429 | Always use the default kernel command string, even if the boot |
| 1430 | loader passes other arguments to the kernel. |
| 1431 | This is useful if you cannot or don't want to change the |
| 1432 | command-line options your boot loader passes to the kernel. |
| 1433 | |
| 1434 | If unsure, say N. |
| 1435 | |
| 1436 | config XIP_KERNEL |
| 1437 | bool "Kernel Execute-In-Place from ROM" |
| 1438 | depends on !ZBOOT_ROM |
| 1439 | help |
| 1440 | Execute-In-Place allows the kernel to run from non-volatile storage |
| 1441 | directly addressable by the CPU, such as NOR flash. This saves RAM |
| 1442 | space since the text section of the kernel is not loaded from flash |
| 1443 | to RAM. Read-write sections, such as the data section and stack, |
| 1444 | are still copied to RAM. The XIP kernel is not compressed since |
| 1445 | it has to run directly from flash, so it will take more space to |
| 1446 | store it. The flash address used to link the kernel object files, |
| 1447 | and for storing it, is configuration dependent. Therefore, if you |
| 1448 | say Y here, you must know the proper physical address where to |
| 1449 | store the kernel image depending on your own flash memory usage. |
| 1450 | |
| 1451 | Also note that the make target becomes "make xipImage" rather than |
| 1452 | "make zImage" or "make Image". The final kernel binary to put in |
| 1453 | ROM memory will be arch/arm/boot/xipImage. |
| 1454 | |
| 1455 | If unsure, say N. |
| 1456 | |
| 1457 | config XIP_PHYS_ADDR |
| 1458 | hex "XIP Kernel Physical Location" |
| 1459 | depends on XIP_KERNEL |
| 1460 | default "0x00080000" |
| 1461 | help |
| 1462 | This is the physical address in your flash memory the kernel will |
| 1463 | be linked for and stored to. This address is dependent on your |
| 1464 | own flash usage. |
| 1465 | |
| 1466 | config KEXEC |
| 1467 | bool "Kexec system call (EXPERIMENTAL)" |
| 1468 | depends on EXPERIMENTAL |
| 1469 | help |
| 1470 | kexec is a system call that implements the ability to shutdown your |
| 1471 | current kernel, and to start another kernel. It is like a reboot |
| 1472 | but it is independent of the system firmware. And like a reboot |
| 1473 | you can start any kernel with it, not just Linux. |
| 1474 | |
| 1475 | It is an ongoing process to be certain the hardware in a machine |
| 1476 | is properly shutdown, so do not be surprised if this code does not |
| 1477 | initially work for you. It may help to enable device hotplugging |
| 1478 | support. |
| 1479 | |
| 1480 | config ATAGS_PROC |
| 1481 | bool "Export atags in procfs" |
| 1482 | depends on KEXEC |
| 1483 | default y |
| 1484 | help |
| 1485 | Should the atags used to boot the kernel be exported in an "atags" |
| 1486 | file in procfs. Useful with kexec. |
| 1487 | |
| 1488 | endmenu |
| 1489 | |
| 1490 | menu "CPU Power Management" |
| 1491 | |
| 1492 | if ARCH_HAS_CPUFREQ |
| 1493 | |
| 1494 | source "drivers/cpufreq/Kconfig" |
| 1495 | |
| 1496 | config CPU_FREQ_SA1100 |
| 1497 | bool |
| 1498 | |
| 1499 | config CPU_FREQ_SA1110 |
| 1500 | bool |
| 1501 | |
| 1502 | config CPU_FREQ_INTEGRATOR |
| 1503 | tristate "CPUfreq driver for ARM Integrator CPUs" |
| 1504 | depends on ARCH_INTEGRATOR && CPU_FREQ |
| 1505 | default y |
| 1506 | help |
| 1507 | This enables the CPUfreq driver for ARM Integrator CPUs. |
| 1508 | |
| 1509 | For details, take a look at <file:Documentation/cpu-freq>. |
| 1510 | |
| 1511 | If in doubt, say Y. |
| 1512 | |
| 1513 | config CPU_FREQ_PXA |
| 1514 | bool |
| 1515 | depends on CPU_FREQ && ARCH_PXA && PXA25x |
| 1516 | default y |
| 1517 | select CPU_FREQ_DEFAULT_GOV_USERSPACE |
| 1518 | |
| 1519 | config CPU_FREQ_S3C64XX |
| 1520 | bool "CPUfreq support for Samsung S3C64XX CPUs" |
| 1521 | depends on CPU_FREQ && CPU_S3C6410 |
| 1522 | |
| 1523 | config CPU_FREQ_S3C |
| 1524 | bool |
| 1525 | help |
| 1526 | Internal configuration node for common cpufreq on Samsung SoC |
| 1527 | |
| 1528 | config CPU_FREQ_S3C24XX |
| 1529 | bool "CPUfreq driver for Samsung S3C24XX series CPUs" |
| 1530 | depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL |
| 1531 | select CPU_FREQ_S3C |
| 1532 | help |
| 1533 | This enables the CPUfreq driver for the Samsung S3C24XX family |
| 1534 | of CPUs. |
| 1535 | |
| 1536 | For details, take a look at <file:Documentation/cpu-freq>. |
| 1537 | |
| 1538 | If in doubt, say N. |
| 1539 | |
| 1540 | config CPU_FREQ_S3C24XX_PLL |
| 1541 | bool "Support CPUfreq changing of PLL frequency" |
| 1542 | depends on CPU_FREQ_S3C24XX && EXPERIMENTAL |
| 1543 | help |
| 1544 | Compile in support for changing the PLL frequency from the |
| 1545 | S3C24XX series CPUfreq driver. The PLL takes time to settle |
| 1546 | after a frequency change, so by default it is not enabled. |
| 1547 | |
| 1548 | This also means that the PLL tables for the selected CPU(s) will |
| 1549 | be built which may increase the size of the kernel image. |
| 1550 | |
| 1551 | config CPU_FREQ_S3C24XX_DEBUG |
| 1552 | bool "Debug CPUfreq Samsung driver core" |
| 1553 | depends on CPU_FREQ_S3C24XX |
| 1554 | help |
| 1555 | Enable s3c_freq_dbg for the Samsung S3C CPUfreq core |
| 1556 | |
| 1557 | config CPU_FREQ_S3C24XX_IODEBUG |
| 1558 | bool "Debug CPUfreq Samsung driver IO timing" |
| 1559 | depends on CPU_FREQ_S3C24XX |
| 1560 | help |
| 1561 | Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core |
| 1562 | |
| 1563 | config CPU_FREQ_S3C24XX_DEBUGFS |
| 1564 | bool "Export debugfs for CPUFreq" |
| 1565 | depends on CPU_FREQ_S3C24XX && DEBUG_FS |
| 1566 | help |
| 1567 | Export status information via debugfs. |
| 1568 | |
| 1569 | endif |
| 1570 | |
| 1571 | source "drivers/cpuidle/Kconfig" |
| 1572 | |
| 1573 | endmenu |
| 1574 | |
| 1575 | menu "Floating point emulation" |
| 1576 | |
| 1577 | comment "At least one emulation must be selected" |
| 1578 | |
| 1579 | config FPE_NWFPE |
| 1580 | bool "NWFPE math emulation" |
| 1581 | depends on !AEABI || OABI_COMPAT |
| 1582 | ---help--- |
| 1583 | Say Y to include the NWFPE floating point emulator in the kernel. |
| 1584 | This is necessary to run most binaries. Linux does not currently |
| 1585 | support floating point hardware so you need to say Y here even if |
| 1586 | your machine has an FPA or floating point co-processor podule. |
| 1587 | |
| 1588 | You may say N here if you are going to load the Acorn FPEmulator |
| 1589 | early in the bootup. |
| 1590 | |
| 1591 | config FPE_NWFPE_XP |
| 1592 | bool "Support extended precision" |
| 1593 | depends on FPE_NWFPE |
| 1594 | help |
| 1595 | Say Y to include 80-bit support in the kernel floating-point |
| 1596 | emulator. Otherwise, only 32 and 64-bit support is compiled in. |
| 1597 | Note that gcc does not generate 80-bit operations by default, |
| 1598 | so in most cases this option only enlarges the size of the |
| 1599 | floating point emulator without any good reason. |
| 1600 | |
| 1601 | You almost surely want to say N here. |
| 1602 | |
| 1603 | config FPE_FASTFPE |
| 1604 | bool "FastFPE math emulation (EXPERIMENTAL)" |
| 1605 | depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL |
| 1606 | ---help--- |
| 1607 | Say Y here to include the FAST floating point emulator in the kernel. |
| 1608 | This is an experimental much faster emulator which now also has full |
| 1609 | precision for the mantissa. It does not support any exceptions. |
| 1610 | It is very simple, and approximately 3-6 times faster than NWFPE. |
| 1611 | |
| 1612 | It should be sufficient for most programs. It may be not suitable |
| 1613 | for scientific calculations, but you have to check this for yourself. |
| 1614 | If you do not feel you need a faster FP emulation you should better |
| 1615 | choose NWFPE. |
| 1616 | |
| 1617 | config VFP |
| 1618 | bool "VFP-format floating point maths" |
| 1619 | depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON |
| 1620 | help |
| 1621 | Say Y to include VFP support code in the kernel. This is needed |
| 1622 | if your hardware includes a VFP unit. |
| 1623 | |
| 1624 | Please see <file:Documentation/arm/VFP/release-notes.txt> for |
| 1625 | release notes and additional status information. |
| 1626 | |
| 1627 | Say N if your target does not have VFP hardware. |
| 1628 | |
| 1629 | config VFPv3 |
| 1630 | bool |
| 1631 | depends on VFP |
| 1632 | default y if CPU_V7 |
| 1633 | |
| 1634 | config NEON |
| 1635 | bool "Advanced SIMD (NEON) Extension support" |
| 1636 | depends on VFPv3 && CPU_V7 |
| 1637 | help |
| 1638 | Say Y to include support code for NEON, the ARMv7 Advanced SIMD |
| 1639 | Extension. |
| 1640 | |
| 1641 | endmenu |
| 1642 | |
| 1643 | menu "Userspace binary formats" |
| 1644 | |
| 1645 | source "fs/Kconfig.binfmt" |
| 1646 | |
| 1647 | config ARTHUR |
| 1648 | tristate "RISC OS personality" |
| 1649 | depends on !AEABI |
| 1650 | help |
| 1651 | Say Y here to include the kernel code necessary if you want to run |
| 1652 | Acorn RISC OS/Arthur binaries under Linux. This code is still very |
| 1653 | experimental; if this sounds frightening, say N and sleep in peace. |
| 1654 | You can also say M here to compile this support as a module (which |
| 1655 | will be called arthur). |
| 1656 | |
| 1657 | endmenu |
| 1658 | |
| 1659 | menu "Power management options" |
| 1660 | |
| 1661 | source "kernel/power/Kconfig" |
| 1662 | |
| 1663 | config ARCH_SUSPEND_POSSIBLE |
| 1664 | def_bool y |
| 1665 | |
| 1666 | endmenu |
| 1667 | |
| 1668 | source "net/Kconfig" |
| 1669 | |
| 1670 | source "drivers/Kconfig" |
| 1671 | |
| 1672 | source "fs/Kconfig" |
| 1673 | |
| 1674 | source "arch/arm/Kconfig.debug" |
| 1675 | |
| 1676 | source "security/Kconfig" |
| 1677 | |
| 1678 | source "crypto/Kconfig" |
| 1679 | |
| 1680 | source "lib/Kconfig" |