1config ARM 2 bool 3 default y 4 select HAVE_AOUT 5 select HAVE_IDE 6 select HAVE_MEMBLOCK 7 select RTC_LIB 8 select SYS_SUPPORTS_APM_EMULATION 9 select GENERIC_ATOMIC64 if (!CPU_32v6K || !AEABI) 10 select HAVE_OPROFILE if (HAVE_PERF_EVENTS) 11 select HAVE_ARCH_KGDB 12 select HAVE_KPROBES if (!XIP_KERNEL) 13 select HAVE_KRETPROBES if (HAVE_KPROBES) 14 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 15 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) 16 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) 17 select HAVE_GENERIC_DMA_COHERENT 18 select HAVE_KERNEL_GZIP 19 select HAVE_KERNEL_LZO 20 select HAVE_KERNEL_LZMA 21 select HAVE_IRQ_WORK 22 select HAVE_PERF_EVENTS 23 select PERF_USE_VMALLOC 24 select HAVE_REGS_AND_STACK_ACCESS_API 25 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V7)) 26 help 27 The ARM series is a line of low-power-consumption RISC chip designs 28 licensed by ARM Ltd and targeted at embedded applications and 29 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 30 manufactured, but legacy ARM-based PC hardware remains popular in 31 Europe. There is an ARM Linux project with a web page at 32 <http://www.arm.linux.org.uk/>. 33 34config HAVE_PWM 35 bool 36 37config SYS_SUPPORTS_APM_EMULATION 38 bool 39 40config GENERIC_GPIO 41 bool 42 43config ARCH_USES_GETTIMEOFFSET 44 bool 45 default n 46 47config GENERIC_CLOCKEVENTS 48 bool 49 50config GENERIC_CLOCKEVENTS_BROADCAST 51 bool 52 depends on GENERIC_CLOCKEVENTS 53 default y if SMP 54 55config HAVE_TCM 56 bool 57 select GENERIC_ALLOCATOR 58 59config HAVE_PROC_CPU 60 bool 61 62config NO_IOPORT 63 bool 64 65config EISA 66 bool 67 ---help--- 68 The Extended Industry Standard Architecture (EISA) bus was 69 developed as an open alternative to the IBM MicroChannel bus. 70 71 The EISA bus provided some of the features of the IBM MicroChannel 72 bus while maintaining backward compatibility with cards made for 73 the older ISA bus. The EISA bus saw limited use between 1988 and 74 1995 when it was made obsolete by the PCI bus. 75 76 Say Y here if you are building a kernel for an EISA-based machine. 77 78 Otherwise, say N. 79 80config SBUS 81 bool 82 83config MCA 84 bool 85 help 86 MicroChannel Architecture is found in some IBM PS/2 machines and 87 laptops. It is a bus system similar to PCI or ISA. See 88 <file:Documentation/mca.txt> (and especially the web page given 89 there) before attempting to build an MCA bus kernel. 90 91config GENERIC_HARDIRQS 92 bool 93 default y 94 95config STACKTRACE_SUPPORT 96 bool 97 default y 98 99config HAVE_LATENCYTOP_SUPPORT 100 bool 101 depends on !SMP 102 default y 103 104config LOCKDEP_SUPPORT 105 bool 106 default y 107 108config TRACE_IRQFLAGS_SUPPORT 109 bool 110 default y 111 112config HARDIRQS_SW_RESEND 113 bool 114 default y 115 116config GENERIC_IRQ_PROBE 117 bool 118 default y 119 120config GENERIC_LOCKBREAK 121 bool 122 default y 123 depends on SMP && PREEMPT 124 125config RWSEM_GENERIC_SPINLOCK 126 bool 127 default y 128 129config RWSEM_XCHGADD_ALGORITHM 130 bool 131 132config ARCH_HAS_ILOG2_U32 133 bool 134 135config ARCH_HAS_ILOG2_U64 136 bool 137 138config ARCH_HAS_CPUFREQ 139 bool 140 help 141 Internal node to signify that the ARCH has CPUFREQ support 142 and that the relevant menu configurations are displayed for 143 it. 144 145config ARCH_HAS_CPU_IDLE_WAIT 146 def_bool y 147 148config GENERIC_HWEIGHT 149 bool 150 default y 151 152config GENERIC_CALIBRATE_DELAY 153 bool 154 default y 155 156config ARCH_MAY_HAVE_PC_FDC 157 bool 158 159config ZONE_DMA 160 bool 161 162config NEED_DMA_MAP_STATE 163 def_bool y 164 165config GENERIC_ISA_DMA 166 bool 167 168config FIQ 169 bool 170 171config ARCH_MTD_XIP 172 bool 173 174config GENERIC_HARDIRQS_NO__DO_IRQ 175 def_bool y 176 177config ARM_L1_CACHE_SHIFT_6 178 bool 179 help 180 Setting ARM L1 cache line size to 64 Bytes. 181 182config VECTORS_BASE 183 hex 184 default 0xffff0000 if MMU || CPU_HIGH_VECTOR 185 default DRAM_BASE if REMAP_VECTORS_TO_RAM 186 default 0x00000000 187 help 188 The base address of exception vectors. 189 190source "init/Kconfig" 191 192source "kernel/Kconfig.freezer" 193 194menu "System Type" 195 196config MMU 197 bool "MMU-based Paged Memory Management Support" 198 default y 199 help 200 Select if you want MMU-based virtualised addressing space 201 support by paged memory management. If unsure, say 'Y'. 202 203# 204# The "ARM system type" choice list is ordered alphabetically by option 205# text. Please add new entries in the option alphabetic order. 206# 207choice 208 prompt "ARM system type" 209 default ARCH_VERSATILE 210 211config ARCH_AAEC2000 212 bool "Agilent AAEC-2000 based" 213 select CPU_ARM920T 214 select ARM_AMBA 215 select HAVE_CLK 216 select ARCH_USES_GETTIMEOFFSET 217 help 218 This enables support for systems based on the Agilent AAEC-2000 219 220config ARCH_INTEGRATOR 221 bool "ARM Ltd. Integrator family" 222 select ARM_AMBA 223 select ARCH_HAS_CPUFREQ 224 select COMMON_CLKDEV 225 select ICST 226 select GENERIC_CLOCKEVENTS 227 select PLAT_VERSATILE 228 help 229 Support for ARM's Integrator platform. 230 231config ARCH_REALVIEW 232 bool "ARM Ltd. RealView family" 233 select ARM_AMBA 234 select COMMON_CLKDEV 235 select ICST 236 select GENERIC_CLOCKEVENTS 237 select ARCH_WANT_OPTIONAL_GPIOLIB 238 select PLAT_VERSATILE 239 select ARM_TIMER_SP804 240 select GPIO_PL061 if GPIOLIB 241 help 242 This enables support for ARM Ltd RealView boards. 243 244config ARCH_VERSATILE 245 bool "ARM Ltd. Versatile family" 246 select ARM_AMBA 247 select ARM_VIC 248 select COMMON_CLKDEV 249 select ICST 250 select GENERIC_CLOCKEVENTS 251 select ARCH_WANT_OPTIONAL_GPIOLIB 252 select PLAT_VERSATILE 253 select ARM_TIMER_SP804 254 help 255 This enables support for ARM Ltd Versatile board. 256 257config ARCH_VEXPRESS 258 bool "ARM Ltd. Versatile Express family" 259 select ARCH_WANT_OPTIONAL_GPIOLIB 260 select ARM_AMBA 261 select ARM_TIMER_SP804 262 select COMMON_CLKDEV 263 select GENERIC_CLOCKEVENTS 264 select HAVE_CLK 265 select ICST 266 select PLAT_VERSATILE 267 help 268 This enables support for the ARM Ltd Versatile Express boards. 269 270config ARCH_AT91 271 bool "Atmel AT91" 272 select ARCH_REQUIRE_GPIOLIB 273 select HAVE_CLK 274 help 275 This enables support for systems based on the Atmel AT91RM9200, 276 AT91SAM9 and AT91CAP9 processors. 277 278config ARCH_BCMRING 279 bool "Broadcom BCMRING" 280 depends on MMU 281 select CPU_V6 282 select ARM_AMBA 283 select COMMON_CLKDEV 284 select GENERIC_CLOCKEVENTS 285 select ARCH_WANT_OPTIONAL_GPIOLIB 286 help 287 Support for Broadcom's BCMRing platform. 288 289config ARCH_CLPS711X 290 bool "Cirrus Logic CLPS711x/EP721x-based" 291 select CPU_ARM720T 292 select ARCH_USES_GETTIMEOFFSET 293 help 294 Support for Cirrus Logic 711x/721x based boards. 295 296config ARCH_CNS3XXX 297 bool "Cavium Networks CNS3XXX family" 298 select CPU_V6 299 select GENERIC_CLOCKEVENTS 300 select ARM_GIC 301 select PCI_DOMAINS if PCI 302 help 303 Support for Cavium Networks CNS3XXX platform. 304 305config ARCH_GEMINI 306 bool "Cortina Systems Gemini" 307 select CPU_FA526 308 select ARCH_REQUIRE_GPIOLIB 309 select ARCH_USES_GETTIMEOFFSET 310 help 311 Support for the Cortina Systems Gemini family SoCs 312 313config ARCH_EBSA110 314 bool "EBSA-110" 315 select CPU_SA110 316 select ISA 317 select NO_IOPORT 318 select ARCH_USES_GETTIMEOFFSET 319 help 320 This is an evaluation board for the StrongARM processor available 321 from Digital. It has limited hardware on-board, including an 322 Ethernet interface, two PCMCIA sockets, two serial ports and a 323 parallel port. 324 325config ARCH_EP93XX 326 bool "EP93xx-based" 327 select CPU_ARM920T 328 select ARM_AMBA 329 select ARM_VIC 330 select COMMON_CLKDEV 331 select ARCH_REQUIRE_GPIOLIB 332 select ARCH_HAS_HOLES_MEMORYMODEL 333 select ARCH_USES_GETTIMEOFFSET 334 help 335 This enables support for the Cirrus EP93xx series of CPUs. 336 337config ARCH_FOOTBRIDGE 338 bool "FootBridge" 339 select CPU_SA110 340 select FOOTBRIDGE 341 select ARCH_USES_GETTIMEOFFSET 342 help 343 Support for systems based on the DC21285 companion chip 344 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 345 346config ARCH_MXC 347 bool "Freescale MXC/iMX-based" 348 select GENERIC_CLOCKEVENTS 349 select ARCH_REQUIRE_GPIOLIB 350 select COMMON_CLKDEV 351 help 352 Support for Freescale MXC/iMX-based family of processors 353 354config ARCH_STMP3XXX 355 bool "Freescale STMP3xxx" 356 select CPU_ARM926T 357 select COMMON_CLKDEV 358 select ARCH_REQUIRE_GPIOLIB 359 select GENERIC_CLOCKEVENTS 360 select USB_ARCH_HAS_EHCI 361 help 362 Support for systems based on the Freescale 3xxx CPUs. 363 364config ARCH_NETX 365 bool "Hilscher NetX based" 366 select CPU_ARM926T 367 select ARM_VIC 368 select GENERIC_CLOCKEVENTS 369 help 370 This enables support for systems based on the Hilscher NetX Soc 371 372config ARCH_H720X 373 bool "Hynix HMS720x-based" 374 select CPU_ARM720T 375 select ISA_DMA_API 376 select ARCH_USES_GETTIMEOFFSET 377 help 378 This enables support for systems based on the Hynix HMS720x 379 380config ARCH_IOP13XX 381 bool "IOP13xx-based" 382 depends on MMU 383 select CPU_XSC3 384 select PLAT_IOP 385 select PCI 386 select ARCH_SUPPORTS_MSI 387 select VMSPLIT_1G 388 help 389 Support for Intel's IOP13XX (XScale) family of processors. 390 391config ARCH_IOP32X 392 bool "IOP32x-based" 393 depends on MMU 394 select CPU_XSCALE 395 select PLAT_IOP 396 select PCI 397 select ARCH_REQUIRE_GPIOLIB 398 help 399 Support for Intel's 80219 and IOP32X (XScale) family of 400 processors. 401 402config ARCH_IOP33X 403 bool "IOP33x-based" 404 depends on MMU 405 select CPU_XSCALE 406 select PLAT_IOP 407 select PCI 408 select ARCH_REQUIRE_GPIOLIB 409 help 410 Support for Intel's IOP33X (XScale) family of processors. 411 412config ARCH_IXP23XX 413 bool "IXP23XX-based" 414 depends on MMU 415 select CPU_XSC3 416 select PCI 417 select ARCH_USES_GETTIMEOFFSET 418 help 419 Support for Intel's IXP23xx (XScale) family of processors. 420 421config ARCH_IXP2000 422 bool "IXP2400/2800-based" 423 depends on MMU 424 select CPU_XSCALE 425 select PCI 426 select ARCH_USES_GETTIMEOFFSET 427 help 428 Support for Intel's IXP2400/2800 (XScale) family of processors. 429 430config ARCH_IXP4XX 431 bool "IXP4xx-based" 432 depends on MMU 433 select CPU_XSCALE 434 select GENERIC_GPIO 435 select GENERIC_CLOCKEVENTS 436 select DMABOUNCE if PCI 437 help 438 Support for Intel's IXP4XX (XScale) family of processors. 439 440config ARCH_DOVE 441 bool "Marvell Dove" 442 select PCI 443 select ARCH_REQUIRE_GPIOLIB 444 select GENERIC_CLOCKEVENTS 445 select PLAT_ORION 446 help 447 Support for the Marvell Dove SoC 88AP510 448 449config ARCH_KIRKWOOD 450 bool "Marvell Kirkwood" 451 select CPU_FEROCEON 452 select PCI 453 select ARCH_REQUIRE_GPIOLIB 454 select GENERIC_CLOCKEVENTS 455 select PLAT_ORION 456 help 457 Support for the following Marvell Kirkwood series SoCs: 458 88F6180, 88F6192 and 88F6281. 459 460config ARCH_LOKI 461 bool "Marvell Loki (88RC8480)" 462 select CPU_FEROCEON 463 select GENERIC_CLOCKEVENTS 464 select PLAT_ORION 465 help 466 Support for the Marvell Loki (88RC8480) SoC. 467 468config ARCH_LPC32XX 469 bool "NXP LPC32XX" 470 select CPU_ARM926T 471 select ARCH_REQUIRE_GPIOLIB 472 select HAVE_IDE 473 select ARM_AMBA 474 select USB_ARCH_HAS_OHCI 475 select COMMON_CLKDEV 476 select GENERIC_TIME 477 select GENERIC_CLOCKEVENTS 478 help 479 Support for the NXP LPC32XX family of processors 480 481config ARCH_MV78XX0 482 bool "Marvell MV78xx0" 483 select CPU_FEROCEON 484 select PCI 485 select ARCH_REQUIRE_GPIOLIB 486 select GENERIC_CLOCKEVENTS 487 select PLAT_ORION 488 help 489 Support for the following Marvell MV78xx0 series SoCs: 490 MV781x0, MV782x0. 491 492config ARCH_ORION5X 493 bool "Marvell Orion" 494 depends on MMU 495 select CPU_FEROCEON 496 select PCI 497 select ARCH_REQUIRE_GPIOLIB 498 select GENERIC_CLOCKEVENTS 499 select PLAT_ORION 500 help 501 Support for the following Marvell Orion 5x series SoCs: 502 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 503 Orion-2 (5281), Orion-1-90 (6183). 504 505config ARCH_MMP 506 bool "Marvell PXA168/910/MMP2" 507 depends on MMU 508 select ARCH_REQUIRE_GPIOLIB 509 select COMMON_CLKDEV 510 select GENERIC_CLOCKEVENTS 511 select TICK_ONESHOT 512 select PLAT_PXA 513 select SPARSE_IRQ 514 help 515 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. 516 517config ARCH_KS8695 518 bool "Micrel/Kendin KS8695" 519 select CPU_ARM922T 520 select ARCH_REQUIRE_GPIOLIB 521 select ARCH_USES_GETTIMEOFFSET 522 help 523 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 524 System-on-Chip devices. 525 526config ARCH_NS9XXX 527 bool "NetSilicon NS9xxx" 528 select CPU_ARM926T 529 select GENERIC_GPIO 530 select GENERIC_CLOCKEVENTS 531 select HAVE_CLK 532 help 533 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx 534 System. 535 536 <http://www.digi.com/products/microprocessors/index.jsp> 537 538config ARCH_W90X900 539 bool "Nuvoton W90X900 CPU" 540 select CPU_ARM926T 541 select ARCH_REQUIRE_GPIOLIB 542 select COMMON_CLKDEV 543 select GENERIC_CLOCKEVENTS 544 help 545 Support for Nuvoton (Winbond logic dept.) ARM9 processor, 546 At present, the w90x900 has been renamed nuc900, regarding 547 the ARM series product line, you can login the following 548 link address to know more. 549 550 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ 551 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> 552 553config ARCH_NUC93X 554 bool "Nuvoton NUC93X CPU" 555 select CPU_ARM926T 556 select COMMON_CLKDEV 557 help 558 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a 559 low-power and high performance MPEG-4/JPEG multimedia controller chip. 560 561config ARCH_TEGRA 562 bool "NVIDIA Tegra" 563 select GENERIC_TIME 564 select GENERIC_CLOCKEVENTS 565 select GENERIC_GPIO 566 select HAVE_CLK 567 select COMMON_CLKDEV 568 select ARCH_HAS_BARRIERS if CACHE_L2X0 569 select ARCH_HAS_CPUFREQ 570 help 571 This enables support for NVIDIA Tegra based systems (Tegra APX, 572 Tegra 6xx and Tegra 2 series). 573 574config ARCH_PNX4008 575 bool "Philips Nexperia PNX4008 Mobile" 576 select CPU_ARM926T 577 select COMMON_CLKDEV 578 select ARCH_USES_GETTIMEOFFSET 579 help 580 This enables support for Philips PNX4008 mobile platform. 581 582config ARCH_PXA 583 bool "PXA2xx/PXA3xx-based" 584 depends on MMU 585 select ARCH_MTD_XIP 586 select ARCH_HAS_CPUFREQ 587 select COMMON_CLKDEV 588 select ARCH_REQUIRE_GPIOLIB 589 select GENERIC_CLOCKEVENTS 590 select TICK_ONESHOT 591 select PLAT_PXA 592 select SPARSE_IRQ 593 help 594 Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 595 596config ARCH_MSM 597 bool "Qualcomm MSM" 598 select HAVE_CLK 599 select GENERIC_CLOCKEVENTS 600 select ARCH_REQUIRE_GPIOLIB 601 help 602 Support for Qualcomm MSM/QSD based systems. This runs on the 603 apps processor of the MSM/QSD and depends on a shared memory 604 interface to the modem processor which runs the baseband 605 stack and controls some vital subsystems 606 (clock and power control, etc). 607 608config ARCH_SHMOBILE 609 bool "Renesas SH-Mobile" 610 help 611 Support for Renesas's SH-Mobile ARM platforms 612 613config ARCH_RPC 614 bool "RiscPC" 615 select ARCH_ACORN 616 select FIQ 617 select TIMER_ACORN 618 select ARCH_MAY_HAVE_PC_FDC 619 select HAVE_PATA_PLATFORM 620 select ISA_DMA_API 621 select NO_IOPORT 622 select ARCH_SPARSEMEM_ENABLE 623 select ARCH_USES_GETTIMEOFFSET 624 help 625 On the Acorn Risc-PC, Linux can support the internal IDE disk and 626 CD-ROM interface, serial and parallel port, and the floppy drive. 627 628config ARCH_SA1100 629 bool "SA1100-based" 630 select CPU_SA1100 631 select ISA 632 select ARCH_SPARSEMEM_ENABLE 633 select ARCH_MTD_XIP 634 select ARCH_HAS_CPUFREQ 635 select CPU_FREQ 636 select GENERIC_CLOCKEVENTS 637 select HAVE_CLK 638 select TICK_ONESHOT 639 select ARCH_REQUIRE_GPIOLIB 640 help 641 Support for StrongARM 11x0 based boards. 642 643config ARCH_S3C2410 644 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450" 645 select GENERIC_GPIO 646 select ARCH_HAS_CPUFREQ 647 select HAVE_CLK 648 select ARCH_USES_GETTIMEOFFSET 649 select HAVE_S3C2410_I2C if I2C 650 help 651 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 652 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 653 the Samsung SMDK2410 development board (and derivatives). 654 655 Note, the S3C2416 and the S3C2450 are so close that they even share 656 the same SoC ID code. This means that there is no seperate machine 657 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first. 658 659config ARCH_S3C64XX 660 bool "Samsung S3C64XX" 661 select PLAT_SAMSUNG 662 select CPU_V6 663 select ARM_VIC 664 select HAVE_CLK 665 select NO_IOPORT 666 select ARCH_USES_GETTIMEOFFSET 667 select ARCH_HAS_CPUFREQ 668 select ARCH_REQUIRE_GPIOLIB 669 select SAMSUNG_CLKSRC 670 select SAMSUNG_IRQ_VIC_TIMER 671 select SAMSUNG_IRQ_UART 672 select S3C_GPIO_TRACK 673 select S3C_GPIO_PULL_UPDOWN 674 select S3C_GPIO_CFG_S3C24XX 675 select S3C_GPIO_CFG_S3C64XX 676 select S3C_DEV_NAND 677 select USB_ARCH_HAS_OHCI 678 select SAMSUNG_GPIOLIB_4BIT 679 select HAVE_S3C2410_I2C if I2C 680 select HAVE_S3C2410_WATCHDOG if WATCHDOG 681 help 682 Samsung S3C64XX series based systems 683 684config ARCH_S5P64X0 685 bool "Samsung S5P6440 S5P6450" 686 select CPU_V6 687 select GENERIC_GPIO 688 select HAVE_CLK 689 select HAVE_S3C2410_WATCHDOG if WATCHDOG 690 select ARCH_USES_GETTIMEOFFSET 691 select HAVE_S3C2410_I2C if I2C 692 select HAVE_S3C_RTC if RTC_CLASS 693 help 694 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440, 695 SMDK6450. 696 697config ARCH_S5P6442 698 bool "Samsung S5P6442" 699 select CPU_V6 700 select GENERIC_GPIO 701 select HAVE_CLK 702 select ARCH_USES_GETTIMEOFFSET 703 select HAVE_S3C2410_WATCHDOG if WATCHDOG 704 help 705 Samsung S5P6442 CPU based systems 706 707config ARCH_S5PC100 708 bool "Samsung S5PC100" 709 select GENERIC_GPIO 710 select HAVE_CLK 711 select CPU_V7 712 select ARM_L1_CACHE_SHIFT_6 713 select ARCH_USES_GETTIMEOFFSET 714 select HAVE_S3C2410_I2C if I2C 715 select HAVE_S3C_RTC if RTC_CLASS 716 select HAVE_S3C2410_WATCHDOG if WATCHDOG 717 help 718 Samsung S5PC100 series based systems 719 720config ARCH_S5PV210 721 bool "Samsung S5PV210/S5PC110" 722 select CPU_V7 723 select ARCH_SPARSEMEM_ENABLE 724 select GENERIC_GPIO 725 select HAVE_CLK 726 select ARM_L1_CACHE_SHIFT_6 727 select ARCH_HAS_CPUFREQ 728 select ARCH_USES_GETTIMEOFFSET 729 select HAVE_S3C2410_I2C if I2C 730 select HAVE_S3C_RTC if RTC_CLASS 731 select HAVE_S3C2410_WATCHDOG if WATCHDOG 732 help 733 Samsung S5PV210/S5PC110 series based systems 734 735config ARCH_S5PV310 736 bool "Samsung S5PV310/S5PC210" 737 select CPU_V7 738 select ARCH_SPARSEMEM_ENABLE 739 select GENERIC_GPIO 740 select HAVE_CLK 741 select GENERIC_CLOCKEVENTS 742 select HAVE_S3C_RTC if RTC_CLASS 743 select HAVE_S3C2410_I2C if I2C 744 select HAVE_S3C2410_WATCHDOG if WATCHDOG 745 help 746 Samsung S5PV310 series based systems 747 748config ARCH_SHARK 749 bool "Shark" 750 select CPU_SA110 751 select ISA 752 select ISA_DMA 753 select ZONE_DMA 754 select PCI 755 select ARCH_USES_GETTIMEOFFSET 756 help 757 Support for the StrongARM based Digital DNARD machine, also known 758 as "Shark" (<http://www.shark-linux.de/shark.html>). 759 760config ARCH_TCC_926 761 bool "Telechips TCC ARM926-based systems" 762 select CPU_ARM926T 763 select HAVE_CLK 764 select COMMON_CLKDEV 765 select GENERIC_CLOCKEVENTS 766 help 767 Support for Telechips TCC ARM926-based systems. 768 769config ARCH_LH7A40X 770 bool "Sharp LH7A40X" 771 select CPU_ARM922T 772 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM 773 select ARCH_USES_GETTIMEOFFSET 774 help 775 Say Y here for systems based on one of the Sharp LH7A40X 776 System on a Chip processors. These CPUs include an ARM922T 777 core with a wide array of integrated devices for 778 hand-held and low-power applications. 779 780config ARCH_U300 781 bool "ST-Ericsson U300 Series" 782 depends on MMU 783 select CPU_ARM926T 784 select HAVE_TCM 785 select ARM_AMBA 786 select ARM_VIC 787 select GENERIC_CLOCKEVENTS 788 select COMMON_CLKDEV 789 select GENERIC_GPIO 790 help 791 Support for ST-Ericsson U300 series mobile platforms. 792 793config ARCH_U8500 794 bool "ST-Ericsson U8500 Series" 795 select CPU_V7 796 select ARM_AMBA 797 select GENERIC_CLOCKEVENTS 798 select COMMON_CLKDEV 799 select ARCH_REQUIRE_GPIOLIB 800 select ARCH_HAS_CPUFREQ 801 help 802 Support for ST-Ericsson's Ux500 architecture 803 804config ARCH_NOMADIK 805 bool "STMicroelectronics Nomadik" 806 select ARM_AMBA 807 select ARM_VIC 808 select CPU_ARM926T 809 select COMMON_CLKDEV 810 select GENERIC_CLOCKEVENTS 811 select ARCH_REQUIRE_GPIOLIB 812 help 813 Support for the Nomadik platform by ST-Ericsson 814 815config ARCH_DAVINCI 816 bool "TI DaVinci" 817 select GENERIC_CLOCKEVENTS 818 select ARCH_REQUIRE_GPIOLIB 819 select ZONE_DMA 820 select HAVE_IDE 821 select COMMON_CLKDEV 822 select GENERIC_ALLOCATOR 823 select ARCH_HAS_HOLES_MEMORYMODEL 824 help 825 Support for TI's DaVinci platform. 826 827config ARCH_OMAP 828 bool "TI OMAP" 829 select HAVE_CLK 830 select ARCH_REQUIRE_GPIOLIB 831 select ARCH_HAS_CPUFREQ 832 select GENERIC_CLOCKEVENTS 833 select ARCH_HAS_HOLES_MEMORYMODEL 834 help 835 Support for TI's OMAP platform (OMAP1/2/3/4). 836 837config PLAT_SPEAR 838 bool "ST SPEAr" 839 select ARM_AMBA 840 select ARCH_REQUIRE_GPIOLIB 841 select COMMON_CLKDEV 842 select GENERIC_CLOCKEVENTS 843 select HAVE_CLK 844 help 845 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx). 846 847endchoice 848 849# 850# This is sorted alphabetically by mach-* pathname. However, plat-* 851# Kconfigs may be included either alphabetically (according to the 852# plat- suffix) or along side the corresponding mach-* source. 853# 854source "arch/arm/mach-aaec2000/Kconfig" 855 856source "arch/arm/mach-at91/Kconfig" 857 858source "arch/arm/mach-bcmring/Kconfig" 859 860source "arch/arm/mach-clps711x/Kconfig" 861 862source "arch/arm/mach-cns3xxx/Kconfig" 863 864source "arch/arm/mach-davinci/Kconfig" 865 866source "arch/arm/mach-dove/Kconfig" 867 868source "arch/arm/mach-ep93xx/Kconfig" 869 870source "arch/arm/mach-footbridge/Kconfig" 871 872source "arch/arm/mach-gemini/Kconfig" 873 874source "arch/arm/mach-h720x/Kconfig" 875 876source "arch/arm/mach-integrator/Kconfig" 877 878source "arch/arm/mach-iop32x/Kconfig" 879 880source "arch/arm/mach-iop33x/Kconfig" 881 882source "arch/arm/mach-iop13xx/Kconfig" 883 884source "arch/arm/mach-ixp4xx/Kconfig" 885 886source "arch/arm/mach-ixp2000/Kconfig" 887 888source "arch/arm/mach-ixp23xx/Kconfig" 889 890source "arch/arm/mach-kirkwood/Kconfig" 891 892source "arch/arm/mach-ks8695/Kconfig" 893 894source "arch/arm/mach-lh7a40x/Kconfig" 895 896source "arch/arm/mach-loki/Kconfig" 897 898source "arch/arm/mach-lpc32xx/Kconfig" 899 900source "arch/arm/mach-msm/Kconfig" 901 902source "arch/arm/mach-mv78xx0/Kconfig" 903 904source "arch/arm/plat-mxc/Kconfig" 905 906source "arch/arm/mach-netx/Kconfig" 907 908source "arch/arm/mach-nomadik/Kconfig" 909source "arch/arm/plat-nomadik/Kconfig" 910 911source "arch/arm/mach-ns9xxx/Kconfig" 912 913source "arch/arm/mach-nuc93x/Kconfig" 914 915source "arch/arm/plat-omap/Kconfig" 916 917source "arch/arm/mach-omap1/Kconfig" 918 919source "arch/arm/mach-omap2/Kconfig" 920 921source "arch/arm/mach-orion5x/Kconfig" 922 923source "arch/arm/mach-pxa/Kconfig" 924source "arch/arm/plat-pxa/Kconfig" 925 926source "arch/arm/mach-mmp/Kconfig" 927 928source "arch/arm/mach-realview/Kconfig" 929 930source "arch/arm/mach-sa1100/Kconfig" 931 932source "arch/arm/plat-samsung/Kconfig" 933source "arch/arm/plat-s3c24xx/Kconfig" 934source "arch/arm/plat-s5p/Kconfig" 935 936source "arch/arm/plat-spear/Kconfig" 937 938source "arch/arm/plat-tcc/Kconfig" 939 940if ARCH_S3C2410 941source "arch/arm/mach-s3c2400/Kconfig" 942source "arch/arm/mach-s3c2410/Kconfig" 943source "arch/arm/mach-s3c2412/Kconfig" 944source "arch/arm/mach-s3c2416/Kconfig" 945source "arch/arm/mach-s3c2440/Kconfig" 946source "arch/arm/mach-s3c2443/Kconfig" 947endif 948 949if ARCH_S3C64XX 950source "arch/arm/mach-s3c64xx/Kconfig" 951endif 952 953source "arch/arm/mach-s5p64x0/Kconfig" 954 955source "arch/arm/mach-s5p6442/Kconfig" 956 957source "arch/arm/mach-s5pc100/Kconfig" 958 959source "arch/arm/mach-s5pv210/Kconfig" 960 961source "arch/arm/mach-s5pv310/Kconfig" 962 963source "arch/arm/mach-shmobile/Kconfig" 964 965source "arch/arm/plat-stmp3xxx/Kconfig" 966 967source "arch/arm/mach-tegra/Kconfig" 968 969source "arch/arm/mach-u300/Kconfig" 970 971source "arch/arm/mach-ux500/Kconfig" 972 973source "arch/arm/mach-versatile/Kconfig" 974 975source "arch/arm/mach-vexpress/Kconfig" 976 977source "arch/arm/mach-w90x900/Kconfig" 978 979# Definitions to make life easier 980config ARCH_ACORN 981 bool 982 983config PLAT_IOP 984 bool 985 select GENERIC_CLOCKEVENTS 986 987config PLAT_ORION 988 bool 989 990config PLAT_PXA 991 bool 992 993config PLAT_VERSATILE 994 bool 995 996config ARM_TIMER_SP804 997 bool 998 999source arch/arm/mm/Kconfig 1000 1001config IWMMXT 1002 bool "Enable iWMMXt support" 1003 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK 1004 default y if PXA27x || PXA3xx || ARCH_MMP 1005 help 1006 Enable support for iWMMXt context switching at run time if 1007 running on a CPU that supports it. 1008 1009# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 1010config XSCALE_PMU 1011 bool 1012 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 1013 default y 1014 1015config CPU_HAS_PMU 1016 depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \ 1017 (!ARCH_OMAP3 || OMAP3_EMU) 1018 default y 1019 bool 1020 1021if !MMU 1022source "arch/arm/Kconfig-nommu" 1023endif 1024 1025config ARM_ERRATA_411920 1026 bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 1027 depends on CPU_V6 1028 help 1029 Invalidation of the Instruction Cache operation can 1030 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 1031 It does not affect the MPCore. This option enables the ARM Ltd. 1032 recommended workaround. 1033 1034config ARM_ERRATA_430973 1035 bool "ARM errata: Stale prediction on replaced interworking branch" 1036 depends on CPU_V7 1037 help 1038 This option enables the workaround for the 430973 Cortex-A8 1039 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 1040 interworking branch is replaced with another code sequence at the 1041 same virtual address, whether due to self-modifying code or virtual 1042 to physical address re-mapping, Cortex-A8 does not recover from the 1043 stale interworking branch prediction. This results in Cortex-A8 1044 executing the new code sequence in the incorrect ARM or Thumb state. 1045 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 1046 and also flushes the branch target cache at every context switch. 1047 Note that setting specific bits in the ACTLR register may not be 1048 available in non-secure mode. 1049 1050config ARM_ERRATA_458693 1051 bool "ARM errata: Processor deadlock when a false hazard is created" 1052 depends on CPU_V7 1053 help 1054 This option enables the workaround for the 458693 Cortex-A8 (r2p0) 1055 erratum. For very specific sequences of memory operations, it is 1056 possible for a hazard condition intended for a cache line to instead 1057 be incorrectly associated with a different cache line. This false 1058 hazard might then cause a processor deadlock. The workaround enables 1059 the L1 caching of the NEON accesses and disables the PLD instruction 1060 in the ACTLR register. Note that setting specific bits in the ACTLR 1061 register may not be available in non-secure mode. 1062 1063config ARM_ERRATA_460075 1064 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 1065 depends on CPU_V7 1066 help 1067 This option enables the workaround for the 460075 Cortex-A8 (r2p0) 1068 erratum. Any asynchronous access to the L2 cache may encounter a 1069 situation in which recent store transactions to the L2 cache are lost 1070 and overwritten with stale memory contents from external memory. The 1071 workaround disables the write-allocate mode for the L2 cache via the 1072 ACTLR register. Note that setting specific bits in the ACTLR register 1073 may not be available in non-secure mode. 1074 1075config ARM_ERRATA_742230 1076 bool "ARM errata: DMB operation may be faulty" 1077 depends on CPU_V7 && SMP 1078 help 1079 This option enables the workaround for the 742230 Cortex-A9 1080 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction 1081 between two write operations may not ensure the correct visibility 1082 ordering of the two writes. This workaround sets a specific bit in 1083 the diagnostic register of the Cortex-A9 which causes the DMB 1084 instruction to behave as a DSB, ensuring the correct behaviour of 1085 the two writes. 1086 1087config ARM_ERRATA_742231 1088 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption" 1089 depends on CPU_V7 && SMP 1090 help 1091 This option enables the workaround for the 742231 Cortex-A9 1092 (r2p0..r2p2) erratum. Under certain conditions, specific to the 1093 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode, 1094 accessing some data located in the same cache line, may get corrupted 1095 data due to bad handling of the address hazard when the line gets 1096 replaced from one of the CPUs at the same time as another CPU is 1097 accessing it. This workaround sets specific bits in the diagnostic 1098 register of the Cortex-A9 which reduces the linefill issuing 1099 capabilities of the processor. 1100 1101config PL310_ERRATA_588369 1102 bool "Clean & Invalidate maintenance operations do not invalidate clean lines" 1103 depends on CACHE_L2X0 && ARCH_OMAP4 1104 help 1105 The PL310 L2 cache controller implements three types of Clean & 1106 Invalidate maintenance operations: by Physical Address 1107 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC). 1108 They are architecturally defined to behave as the execution of a 1109 clean operation followed immediately by an invalidate operation, 1110 both performing to the same memory location. This functionality 1111 is not correctly implemented in PL310 as clean lines are not 1112 invalidated as a result of these operations. Note that this errata 1113 uses Texas Instrument's secure monitor api. 1114 1115config ARM_ERRATA_720789 1116 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID" 1117 depends on CPU_V7 && SMP 1118 help 1119 This option enables the workaround for the 720789 Cortex-A9 (prior to 1120 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the 1121 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS. 1122 As a consequence of this erratum, some TLB entries which should be 1123 invalidated are not, resulting in an incoherency in the system page 1124 tables. The workaround changes the TLB flushing routines to invalidate 1125 entries regardless of the ASID. 1126 1127config 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 (r2p0..r2p2) 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 1140endmenu 1141 1142source "arch/arm/common/Kconfig" 1143 1144menu "Bus support" 1145 1146config ARM_AMBA 1147 bool 1148 1149config ISA 1150 bool 1151 help 1152 Find out whether you have ISA slots on your motherboard. ISA is the 1153 name of a bus system, i.e. the way the CPU talks to the other stuff 1154 inside your box. Other bus systems are PCI, EISA, MicroChannel 1155 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 1156 newer boards don't support it. If you have ISA, say Y, otherwise N. 1157 1158# Select ISA DMA controller support 1159config ISA_DMA 1160 bool 1161 select ISA_DMA_API 1162 1163# Select ISA DMA interface 1164config ISA_DMA_API 1165 bool 1166 1167config PCI 1168 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX 1169 help 1170 Find out whether you have a PCI motherboard. PCI is the name of a 1171 bus system, i.e. the way the CPU talks to the other stuff inside 1172 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 1173 VESA. If you have PCI, say Y, otherwise N. 1174 1175config PCI_DOMAINS 1176 bool 1177 depends on PCI 1178 1179config PCI_SYSCALL 1180 def_bool PCI 1181 1182# Select the host bridge type 1183config PCI_HOST_VIA82C505 1184 bool 1185 depends on PCI && ARCH_SHARK 1186 default y 1187 1188config PCI_HOST_ITE8152 1189 bool 1190 depends on PCI && MACH_ARMCORE 1191 default y 1192 select DMABOUNCE 1193 1194source "drivers/pci/Kconfig" 1195 1196source "drivers/pcmcia/Kconfig" 1197 1198endmenu 1199 1200menu "Kernel Features" 1201 1202source "kernel/time/Kconfig" 1203 1204config SMP 1205 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 1206 depends on EXPERIMENTAL 1207 depends on GENERIC_CLOCKEVENTS 1208 depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \ 1209 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\ 1210 ARCH_S5PV310 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 1211 select USE_GENERIC_SMP_HELPERS 1212 select HAVE_ARM_SCU 1213 help 1214 This enables support for systems with more than one CPU. If you have 1215 a system with only one CPU, like most personal computers, say N. If 1216 you have a system with more than one CPU, say Y. 1217 1218 If you say N here, the kernel will run on single and multiprocessor 1219 machines, but will use only one CPU of a multiprocessor machine. If 1220 you say Y here, the kernel will run on many, but not all, single 1221 processor machines. On a single processor machine, the kernel will 1222 run faster if you say N here. 1223 1224 See also <file:Documentation/i386/IO-APIC.txt>, 1225 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 1226 <http://tldp.org/HOWTO/SMP-HOWTO.html>. 1227 1228 If you don't know what to do here, say N. 1229 1230config SMP_ON_UP 1231 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)" 1232 depends on EXPERIMENTAL 1233 depends on SMP && !XIP && !THUMB2_KERNEL 1234 default y 1235 help 1236 SMP kernels contain instructions which fail on non-SMP processors. 1237 Enabling this option allows the kernel to modify itself to make 1238 these instructions safe. Disabling it allows about 1K of space 1239 savings. 1240 1241 If you don't know what to do here, say Y. 1242 1243config HAVE_ARM_SCU 1244 bool 1245 depends on SMP 1246 help 1247 This option enables support for the ARM system coherency unit 1248 1249config HAVE_ARM_TWD 1250 bool 1251 depends on SMP 1252 help 1253 This options enables support for the ARM timer and watchdog unit 1254 1255choice 1256 prompt "Memory split" 1257 default VMSPLIT_3G 1258 help 1259 Select the desired split between kernel and user memory. 1260 1261 If you are not absolutely sure what you are doing, leave this 1262 option alone! 1263 1264 config VMSPLIT_3G 1265 bool "3G/1G user/kernel split" 1266 config VMSPLIT_2G 1267 bool "2G/2G user/kernel split" 1268 config VMSPLIT_1G 1269 bool "1G/3G user/kernel split" 1270endchoice 1271 1272config PAGE_OFFSET 1273 hex 1274 default 0x40000000 if VMSPLIT_1G 1275 default 0x80000000 if VMSPLIT_2G 1276 default 0xC0000000 1277 1278config NR_CPUS 1279 int "Maximum number of CPUs (2-32)" 1280 range 2 32 1281 depends on SMP 1282 default "4" 1283 1284config HOTPLUG_CPU 1285 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 1286 depends on SMP && HOTPLUG && EXPERIMENTAL 1287 help 1288 Say Y here to experiment with turning CPUs off and on. CPUs 1289 can be controlled through /sys/devices/system/cpu. 1290 1291config LOCAL_TIMERS 1292 bool "Use local timer interrupts" 1293 depends on SMP 1294 default y 1295 select HAVE_ARM_TWD 1296 help 1297 Enable support for local timers on SMP platforms, rather then the 1298 legacy IPI broadcast method. Local timers allows the system 1299 accounting to be spread across the timer interval, preventing a 1300 "thundering herd" at every timer tick. 1301 1302source kernel/Kconfig.preempt 1303 1304config HZ 1305 int 1306 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \ 1307 ARCH_S5P6442 || ARCH_S5PV210 || ARCH_S5PV310 1308 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 1309 default AT91_TIMER_HZ if ARCH_AT91 1310 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE 1311 default 100 1312 1313config THUMB2_KERNEL 1314 bool "Compile the kernel in Thumb-2 mode" 1315 depends on CPU_V7 && EXPERIMENTAL 1316 select AEABI 1317 select ARM_ASM_UNIFIED 1318 help 1319 By enabling this option, the kernel will be compiled in 1320 Thumb-2 mode. A compiler/assembler that understand the unified 1321 ARM-Thumb syntax is needed. 1322 1323 If unsure, say N. 1324 1325config ARM_ASM_UNIFIED 1326 bool 1327 1328config AEABI 1329 bool "Use the ARM EABI to compile the kernel" 1330 help 1331 This option allows for the kernel to be compiled using the latest 1332 ARM ABI (aka EABI). This is only useful if you are using a user 1333 space environment that is also compiled with EABI. 1334 1335 Since there are major incompatibilities between the legacy ABI and 1336 EABI, especially with regard to structure member alignment, this 1337 option also changes the kernel syscall calling convention to 1338 disambiguate both ABIs and allow for backward compatibility support 1339 (selected with CONFIG_OABI_COMPAT). 1340 1341 To use this you need GCC version 4.0.0 or later. 1342 1343config OABI_COMPAT 1344 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 1345 depends on AEABI && EXPERIMENTAL 1346 default y 1347 help 1348 This option preserves the old syscall interface along with the 1349 new (ARM EABI) one. It also provides a compatibility layer to 1350 intercept syscalls that have structure arguments which layout 1351 in memory differs between the legacy ABI and the new ARM EABI 1352 (only for non "thumb" binaries). This option adds a tiny 1353 overhead to all syscalls and produces a slightly larger kernel. 1354 If you know you'll be using only pure EABI user space then you 1355 can say N here. If this option is not selected and you attempt 1356 to execute a legacy ABI binary then the result will be 1357 UNPREDICTABLE (in fact it can be predicted that it won't work 1358 at all). If in doubt say Y. 1359 1360config ARCH_HAS_HOLES_MEMORYMODEL 1361 bool 1362 1363config ARCH_SPARSEMEM_ENABLE 1364 bool 1365 1366config ARCH_SPARSEMEM_DEFAULT 1367 def_bool ARCH_SPARSEMEM_ENABLE 1368 1369config ARCH_SELECT_MEMORY_MODEL 1370 def_bool ARCH_SPARSEMEM_ENABLE 1371 1372config HIGHMEM 1373 bool "High Memory Support (EXPERIMENTAL)" 1374 depends on MMU && EXPERIMENTAL 1375 help 1376 The address space of ARM processors is only 4 Gigabytes large 1377 and it has to accommodate user address space, kernel address 1378 space as well as some memory mapped IO. That means that, if you 1379 have a large amount of physical memory and/or IO, not all of the 1380 memory can be "permanently mapped" by the kernel. The physical 1381 memory that is not permanently mapped is called "high memory". 1382 1383 Depending on the selected kernel/user memory split, minimum 1384 vmalloc space and actual amount of RAM, you may not need this 1385 option which should result in a slightly faster kernel. 1386 1387 If unsure, say n. 1388 1389config HIGHPTE 1390 bool "Allocate 2nd-level pagetables from highmem" 1391 depends on HIGHMEM 1392 depends on !OUTER_CACHE 1393 1394config HW_PERF_EVENTS 1395 bool "Enable hardware performance counter support for perf events" 1396 depends on PERF_EVENTS && CPU_HAS_PMU 1397 default y 1398 help 1399 Enable hardware performance counter support for perf events. If 1400 disabled, perf events will use software events only. 1401 1402config SPARSE_IRQ 1403 def_bool n 1404 help 1405 This enables support for sparse irqs. This is useful in general 1406 as most CPUs have a fairly sparse array of IRQ vectors, which 1407 the irq_desc then maps directly on to. Systems with a high 1408 number of off-chip IRQs will want to treat this as 1409 experimental until they have been independently verified. 1410 1411source "mm/Kconfig" 1412 1413config FORCE_MAX_ZONEORDER 1414 int "Maximum zone order" if ARCH_SHMOBILE 1415 range 11 64 if ARCH_SHMOBILE 1416 default "9" if SA1111 1417 default "11" 1418 help 1419 The kernel memory allocator divides physically contiguous memory 1420 blocks into "zones", where each zone is a power of two number of 1421 pages. This option selects the largest power of two that the kernel 1422 keeps in the memory allocator. If you need to allocate very large 1423 blocks of physically contiguous memory, then you may need to 1424 increase this value. 1425 1426 This config option is actually maximum order plus one. For example, 1427 a value of 11 means that the largest free memory block is 2^10 pages. 1428 1429config LEDS 1430 bool "Timer and CPU usage LEDs" 1431 depends on ARCH_CDB89712 || ARCH_EBSA110 || \ 1432 ARCH_EBSA285 || ARCH_INTEGRATOR || \ 1433 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 1434 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 1435 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 1436 ARCH_AT91 || ARCH_DAVINCI || \ 1437 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW 1438 help 1439 If you say Y here, the LEDs on your machine will be used 1440 to provide useful information about your current system status. 1441 1442 If you are compiling a kernel for a NetWinder or EBSA-285, you will 1443 be able to select which LEDs are active using the options below. If 1444 you are compiling a kernel for the EBSA-110 or the LART however, the 1445 red LED will simply flash regularly to indicate that the system is 1446 still functional. It is safe to say Y here if you have a CATS 1447 system, but the driver will do nothing. 1448 1449config LEDS_TIMER 1450 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 1451 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1452 || MACH_OMAP_PERSEUS2 1453 depends on LEDS 1454 depends on !GENERIC_CLOCKEVENTS 1455 default y if ARCH_EBSA110 1456 help 1457 If you say Y here, one of the system LEDs (the green one on the 1458 NetWinder, the amber one on the EBSA285, or the red one on the LART) 1459 will flash regularly to indicate that the system is still 1460 operational. This is mainly useful to kernel hackers who are 1461 debugging unstable kernels. 1462 1463 The LART uses the same LED for both Timer LED and CPU usage LED 1464 functions. You may choose to use both, but the Timer LED function 1465 will overrule the CPU usage LED. 1466 1467config LEDS_CPU 1468 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 1469 !ARCH_OMAP) \ 1470 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1471 || MACH_OMAP_PERSEUS2 1472 depends on LEDS 1473 help 1474 If you say Y here, the red LED will be used to give a good real 1475 time indication of CPU usage, by lighting whenever the idle task 1476 is not currently executing. 1477 1478 The LART uses the same LED for both Timer LED and CPU usage LED 1479 functions. You may choose to use both, but the Timer LED function 1480 will overrule the CPU usage LED. 1481 1482config ALIGNMENT_TRAP 1483 bool 1484 depends on CPU_CP15_MMU 1485 default y if !ARCH_EBSA110 1486 select HAVE_PROC_CPU if PROC_FS 1487 help 1488 ARM processors cannot fetch/store information which is not 1489 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 1490 address divisible by 4. On 32-bit ARM processors, these non-aligned 1491 fetch/store instructions will be emulated in software if you say 1492 here, which has a severe performance impact. This is necessary for 1493 correct operation of some network protocols. With an IP-only 1494 configuration it is safe to say N, otherwise say Y. 1495 1496config UACCESS_WITH_MEMCPY 1497 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)" 1498 depends on MMU && EXPERIMENTAL 1499 default y if CPU_FEROCEON 1500 help 1501 Implement faster copy_to_user and clear_user methods for CPU 1502 cores where a 8-word STM instruction give significantly higher 1503 memory write throughput than a sequence of individual 32bit stores. 1504 1505 A possible side effect is a slight increase in scheduling latency 1506 between threads sharing the same address space if they invoke 1507 such copy operations with large buffers. 1508 1509 However, if the CPU data cache is using a write-allocate mode, 1510 this option is unlikely to provide any performance gain. 1511 1512config SECCOMP 1513 bool 1514 prompt "Enable seccomp to safely compute untrusted bytecode" 1515 ---help--- 1516 This kernel feature is useful for number crunching applications 1517 that may need to compute untrusted bytecode during their 1518 execution. By using pipes or other transports made available to 1519 the process as file descriptors supporting the read/write 1520 syscalls, it's possible to isolate those applications in 1521 their own address space using seccomp. Once seccomp is 1522 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled 1523 and the task is only allowed to execute a few safe syscalls 1524 defined by each seccomp mode. 1525 1526config CC_STACKPROTECTOR 1527 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 1528 help 1529 This option turns on the -fstack-protector GCC feature. This 1530 feature puts, at the beginning of functions, a canary value on 1531 the stack just before the return address, and validates 1532 the value just before actually returning. Stack based buffer 1533 overflows (that need to overwrite this return address) now also 1534 overwrite the canary, which gets detected and the attack is then 1535 neutralized via a kernel panic. 1536 This feature requires gcc version 4.2 or above. 1537 1538config DEPRECATED_PARAM_STRUCT 1539 bool "Provide old way to pass kernel parameters" 1540 help 1541 This was deprecated in 2001 and announced to live on for 5 years. 1542 Some old boot loaders still use this way. 1543 1544endmenu 1545 1546menu "Boot options" 1547 1548# Compressed boot loader in ROM. Yes, we really want to ask about 1549# TEXT and BSS so we preserve their values in the config files. 1550config ZBOOT_ROM_TEXT 1551 hex "Compressed ROM boot loader base address" 1552 default "0" 1553 help 1554 The physical address at which the ROM-able zImage is to be 1555 placed in the target. Platforms which normally make use of 1556 ROM-able zImage formats normally set this to a suitable 1557 value in their defconfig file. 1558 1559 If ZBOOT_ROM is not enabled, this has no effect. 1560 1561config ZBOOT_ROM_BSS 1562 hex "Compressed ROM boot loader BSS address" 1563 default "0" 1564 help 1565 The base address of an area of read/write memory in the target 1566 for the ROM-able zImage which must be available while the 1567 decompressor is running. It must be large enough to hold the 1568 entire decompressed kernel plus an additional 128 KiB. 1569 Platforms which normally make use of ROM-able zImage formats 1570 normally set this to a suitable value in their defconfig file. 1571 1572 If ZBOOT_ROM is not enabled, this has no effect. 1573 1574config ZBOOT_ROM 1575 bool "Compressed boot loader in ROM/flash" 1576 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 1577 help 1578 Say Y here if you intend to execute your compressed kernel image 1579 (zImage) directly from ROM or flash. If unsure, say N. 1580 1581config CMDLINE 1582 string "Default kernel command string" 1583 default "" 1584 help 1585 On some architectures (EBSA110 and CATS), there is currently no way 1586 for the boot loader to pass arguments to the kernel. For these 1587 architectures, you should supply some command-line options at build 1588 time by entering them here. As a minimum, you should specify the 1589 memory size and the root device (e.g., mem=64M root=/dev/nfs). 1590 1591config CMDLINE_FORCE 1592 bool "Always use the default kernel command string" 1593 depends on CMDLINE != "" 1594 help 1595 Always use the default kernel command string, even if the boot 1596 loader passes other arguments to the kernel. 1597 This is useful if you cannot or don't want to change the 1598 command-line options your boot loader passes to the kernel. 1599 1600 If unsure, say N. 1601 1602config XIP_KERNEL 1603 bool "Kernel Execute-In-Place from ROM" 1604 depends on !ZBOOT_ROM 1605 help 1606 Execute-In-Place allows the kernel to run from non-volatile storage 1607 directly addressable by the CPU, such as NOR flash. This saves RAM 1608 space since the text section of the kernel is not loaded from flash 1609 to RAM. Read-write sections, such as the data section and stack, 1610 are still copied to RAM. The XIP kernel is not compressed since 1611 it has to run directly from flash, so it will take more space to 1612 store it. The flash address used to link the kernel object files, 1613 and for storing it, is configuration dependent. Therefore, if you 1614 say Y here, you must know the proper physical address where to 1615 store the kernel image depending on your own flash memory usage. 1616 1617 Also note that the make target becomes "make xipImage" rather than 1618 "make zImage" or "make Image". The final kernel binary to put in 1619 ROM memory will be arch/arm/boot/xipImage. 1620 1621 If unsure, say N. 1622 1623config XIP_PHYS_ADDR 1624 hex "XIP Kernel Physical Location" 1625 depends on XIP_KERNEL 1626 default "0x00080000" 1627 help 1628 This is the physical address in your flash memory the kernel will 1629 be linked for and stored to. This address is dependent on your 1630 own flash usage. 1631 1632config KEXEC 1633 bool "Kexec system call (EXPERIMENTAL)" 1634 depends on EXPERIMENTAL 1635 help 1636 kexec is a system call that implements the ability to shutdown your 1637 current kernel, and to start another kernel. It is like a reboot 1638 but it is independent of the system firmware. And like a reboot 1639 you can start any kernel with it, not just Linux. 1640 1641 It is an ongoing process to be certain the hardware in a machine 1642 is properly shutdown, so do not be surprised if this code does not 1643 initially work for you. It may help to enable device hotplugging 1644 support. 1645 1646config ATAGS_PROC 1647 bool "Export atags in procfs" 1648 depends on KEXEC 1649 default y 1650 help 1651 Should the atags used to boot the kernel be exported in an "atags" 1652 file in procfs. Useful with kexec. 1653 1654config AUTO_ZRELADDR 1655 bool "Auto calculation of the decompressed kernel image address" 1656 depends on !ZBOOT_ROM && !ARCH_U300 1657 help 1658 ZRELADDR is the physical address where the decompressed kernel 1659 image will be placed. If AUTO_ZRELADDR is selected, the address 1660 will be determined at run-time by masking the current IP with 1661 0xf8000000. This assumes the zImage being placed in the first 128MB 1662 from start of memory. 1663 1664endmenu 1665 1666menu "CPU Power Management" 1667 1668if ARCH_HAS_CPUFREQ 1669 1670source "drivers/cpufreq/Kconfig" 1671 1672config CPU_FREQ_IMX 1673 tristate "CPUfreq driver for i.MX CPUs" 1674 depends on ARCH_MXC && CPU_FREQ 1675 help 1676 This enables the CPUfreq driver for i.MX CPUs. 1677 1678config CPU_FREQ_SA1100 1679 bool 1680 1681config CPU_FREQ_SA1110 1682 bool 1683 1684config CPU_FREQ_INTEGRATOR 1685 tristate "CPUfreq driver for ARM Integrator CPUs" 1686 depends on ARCH_INTEGRATOR && CPU_FREQ 1687 default y 1688 help 1689 This enables the CPUfreq driver for ARM Integrator CPUs. 1690 1691 For details, take a look at <file:Documentation/cpu-freq>. 1692 1693 If in doubt, say Y. 1694 1695config CPU_FREQ_PXA 1696 bool 1697 depends on CPU_FREQ && ARCH_PXA && PXA25x 1698 default y 1699 select CPU_FREQ_DEFAULT_GOV_USERSPACE 1700 1701config CPU_FREQ_S3C64XX 1702 bool "CPUfreq support for Samsung S3C64XX CPUs" 1703 depends on CPU_FREQ && CPU_S3C6410 1704 1705config CPU_FREQ_S3C 1706 bool 1707 help 1708 Internal configuration node for common cpufreq on Samsung SoC 1709 1710config CPU_FREQ_S3C24XX 1711 bool "CPUfreq driver for Samsung S3C24XX series CPUs" 1712 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL 1713 select CPU_FREQ_S3C 1714 help 1715 This enables the CPUfreq driver for the Samsung S3C24XX family 1716 of CPUs. 1717 1718 For details, take a look at <file:Documentation/cpu-freq>. 1719 1720 If in doubt, say N. 1721 1722config CPU_FREQ_S3C24XX_PLL 1723 bool "Support CPUfreq changing of PLL frequency" 1724 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL 1725 help 1726 Compile in support for changing the PLL frequency from the 1727 S3C24XX series CPUfreq driver. The PLL takes time to settle 1728 after a frequency change, so by default it is not enabled. 1729 1730 This also means that the PLL tables for the selected CPU(s) will 1731 be built which may increase the size of the kernel image. 1732 1733config CPU_FREQ_S3C24XX_DEBUG 1734 bool "Debug CPUfreq Samsung driver core" 1735 depends on CPU_FREQ_S3C24XX 1736 help 1737 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core 1738 1739config CPU_FREQ_S3C24XX_IODEBUG 1740 bool "Debug CPUfreq Samsung driver IO timing" 1741 depends on CPU_FREQ_S3C24XX 1742 help 1743 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core 1744 1745config CPU_FREQ_S3C24XX_DEBUGFS 1746 bool "Export debugfs for CPUFreq" 1747 depends on CPU_FREQ_S3C24XX && DEBUG_FS 1748 help 1749 Export status information via debugfs. 1750 1751endif 1752 1753source "drivers/cpuidle/Kconfig" 1754 1755endmenu 1756 1757menu "Floating point emulation" 1758 1759comment "At least one emulation must be selected" 1760 1761config FPE_NWFPE 1762 bool "NWFPE math emulation" 1763 depends on !AEABI || OABI_COMPAT 1764 ---help--- 1765 Say Y to include the NWFPE floating point emulator in the kernel. 1766 This is necessary to run most binaries. Linux does not currently 1767 support floating point hardware so you need to say Y here even if 1768 your machine has an FPA or floating point co-processor podule. 1769 1770 You may say N here if you are going to load the Acorn FPEmulator 1771 early in the bootup. 1772 1773config FPE_NWFPE_XP 1774 bool "Support extended precision" 1775 depends on FPE_NWFPE 1776 help 1777 Say Y to include 80-bit support in the kernel floating-point 1778 emulator. Otherwise, only 32 and 64-bit support is compiled in. 1779 Note that gcc does not generate 80-bit operations by default, 1780 so in most cases this option only enlarges the size of the 1781 floating point emulator without any good reason. 1782 1783 You almost surely want to say N here. 1784 1785config FPE_FASTFPE 1786 bool "FastFPE math emulation (EXPERIMENTAL)" 1787 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 1788 ---help--- 1789 Say Y here to include the FAST floating point emulator in the kernel. 1790 This is an experimental much faster emulator which now also has full 1791 precision for the mantissa. It does not support any exceptions. 1792 It is very simple, and approximately 3-6 times faster than NWFPE. 1793 1794 It should be sufficient for most programs. It may be not suitable 1795 for scientific calculations, but you have to check this for yourself. 1796 If you do not feel you need a faster FP emulation you should better 1797 choose NWFPE. 1798 1799config VFP 1800 bool "VFP-format floating point maths" 1801 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 1802 help 1803 Say Y to include VFP support code in the kernel. This is needed 1804 if your hardware includes a VFP unit. 1805 1806 Please see <file:Documentation/arm/VFP/release-notes.txt> for 1807 release notes and additional status information. 1808 1809 Say N if your target does not have VFP hardware. 1810 1811config VFPv3 1812 bool 1813 depends on VFP 1814 default y if CPU_V7 1815 1816config NEON 1817 bool "Advanced SIMD (NEON) Extension support" 1818 depends on VFPv3 && CPU_V7 1819 help 1820 Say Y to include support code for NEON, the ARMv7 Advanced SIMD 1821 Extension. 1822 1823endmenu 1824 1825menu "Userspace binary formats" 1826 1827source "fs/Kconfig.binfmt" 1828 1829config ARTHUR 1830 tristate "RISC OS personality" 1831 depends on !AEABI 1832 help 1833 Say Y here to include the kernel code necessary if you want to run 1834 Acorn RISC OS/Arthur binaries under Linux. This code is still very 1835 experimental; if this sounds frightening, say N and sleep in peace. 1836 You can also say M here to compile this support as a module (which 1837 will be called arthur). 1838 1839endmenu 1840 1841menu "Power management options" 1842 1843source "kernel/power/Kconfig" 1844 1845config ARCH_SUSPEND_POSSIBLE 1846 def_bool y 1847 1848endmenu 1849 1850source "net/Kconfig" 1851 1852source "drivers/Kconfig" 1853 1854source "fs/Kconfig" 1855 1856source "arch/arm/Kconfig.debug" 1857 1858source "security/Kconfig" 1859 1860source "crypto/Kconfig" 1861 1862source "lib/Kconfig" 1863