1# 2# For a description of the syntax of this configuration file, 3# see Documentation/kbuild/kconfig-language.txt. 4# 5 6mainmenu "Linux Kernel Configuration" 7 8config 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 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_PERF_EVENTS 25 select PERF_USE_VMALLOC 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 GENERIC_TIME 44 bool 45 46config GENERIC_CLOCKEVENTS 47 bool 48 49config GENERIC_CLOCKEVENTS_BROADCAST 50 bool 51 depends on GENERIC_CLOCKEVENTS 52 default y if SMP && !LOCAL_TIMERS 53 54config HAVE_TCM 55 bool 56 select GENERIC_ALLOCATOR 57 58config HAVE_PROC_CPU 59 bool 60 61config NO_IOPORT 62 bool 63 64config EISA 65 bool 66 ---help--- 67 The Extended Industry Standard Architecture (EISA) bus was 68 developed as an open alternative to the IBM MicroChannel bus. 69 70 The EISA bus provided some of the features of the IBM MicroChannel 71 bus while maintaining backward compatibility with cards made for 72 the older ISA bus. The EISA bus saw limited use between 1988 and 73 1995 when it was made obsolete by the PCI bus. 74 75 Say Y here if you are building a kernel for an EISA-based machine. 76 77 Otherwise, say N. 78 79config SBUS 80 bool 81 82config MCA 83 bool 84 help 85 MicroChannel Architecture is found in some IBM PS/2 machines and 86 laptops. It is a bus system similar to PCI or ISA. See 87 <file:Documentation/mca.txt> (and especially the web page given 88 there) before attempting to build an MCA bus kernel. 89 90config GENERIC_HARDIRQS 91 bool 92 default y 93 94config STACKTRACE_SUPPORT 95 bool 96 default y 97 98config HAVE_LATENCYTOP_SUPPORT 99 bool 100 depends on !SMP 101 default y 102 103config LOCKDEP_SUPPORT 104 bool 105 default y 106 107config TRACE_IRQFLAGS_SUPPORT 108 bool 109 default y 110 111config HARDIRQS_SW_RESEND 112 bool 113 default y 114 115config GENERIC_IRQ_PROBE 116 bool 117 default y 118 119config GENERIC_LOCKBREAK 120 bool 121 default y 122 depends on SMP && PREEMPT 123 124config RWSEM_GENERIC_SPINLOCK 125 bool 126 default y 127 128config RWSEM_XCHGADD_ALGORITHM 129 bool 130 131config ARCH_HAS_ILOG2_U32 132 bool 133 134config ARCH_HAS_ILOG2_U64 135 bool 136 137config ARCH_HAS_CPUFREQ 138 bool 139 help 140 Internal node to signify that the ARCH has CPUFREQ support 141 and that the relevant menu configurations are displayed for 142 it. 143 144config GENERIC_HWEIGHT 145 bool 146 default y 147 148config GENERIC_CALIBRATE_DELAY 149 bool 150 default y 151 152config ARCH_MAY_HAVE_PC_FDC 153 bool 154 155config ZONE_DMA 156 bool 157 158config NEED_DMA_MAP_STATE 159 def_bool y 160 161config GENERIC_ISA_DMA 162 bool 163 164config FIQ 165 bool 166 167config ARCH_MTD_XIP 168 bool 169 170config GENERIC_HARDIRQS_NO__DO_IRQ 171 def_bool y 172 173config ARM_L1_CACHE_SHIFT_6 174 bool 175 help 176 Setting ARM L1 cache line size to 64 Bytes. 177 178if OPROFILE 179 180config OPROFILE_ARMV6 181 def_bool y 182 depends on CPU_V6 && !SMP 183 select OPROFILE_ARM11_CORE 184 185config OPROFILE_MPCORE 186 def_bool y 187 depends on CPU_V6 && SMP 188 select OPROFILE_ARM11_CORE 189 190config OPROFILE_ARM11_CORE 191 bool 192 193config OPROFILE_ARMV7 194 def_bool y 195 depends on CPU_V7 && !SMP 196 bool 197 198endif 199 200config VECTORS_BASE 201 hex 202 default 0xffff0000 if MMU || CPU_HIGH_VECTOR 203 default DRAM_BASE if REMAP_VECTORS_TO_RAM 204 default 0x00000000 205 help 206 The base address of exception vectors. 207 208source "init/Kconfig" 209 210source "kernel/Kconfig.freezer" 211 212menu "System Type" 213 214config MMU 215 bool "MMU-based Paged Memory Management Support" 216 default y 217 help 218 Select if you want MMU-based virtualised addressing space 219 support by paged memory management. If unsure, say 'Y'. 220 221# 222# The "ARM system type" choice list is ordered alphabetically by option 223# text. Please add new entries in the option alphabetic order. 224# 225choice 226 prompt "ARM system type" 227 default ARCH_VERSATILE 228 229config ARCH_AAEC2000 230 bool "Agilent AAEC-2000 based" 231 select CPU_ARM920T 232 select ARM_AMBA 233 select HAVE_CLK 234 help 235 This enables support for systems based on the Agilent AAEC-2000 236 237config ARCH_INTEGRATOR 238 bool "ARM Ltd. Integrator family" 239 select ARM_AMBA 240 select ARCH_HAS_CPUFREQ 241 select HAVE_CLK 242 select COMMON_CLKDEV 243 select ICST525 244 help 245 Support for ARM's Integrator platform. 246 247config ARCH_REALVIEW 248 bool "ARM Ltd. RealView family" 249 select ARM_AMBA 250 select HAVE_CLK 251 select COMMON_CLKDEV 252 select ICST307 253 select GENERIC_TIME 254 select GENERIC_CLOCKEVENTS 255 select ARCH_WANT_OPTIONAL_GPIOLIB 256 help 257 This enables support for ARM Ltd RealView boards. 258 259config ARCH_VERSATILE 260 bool "ARM Ltd. Versatile family" 261 select ARM_AMBA 262 select ARM_VIC 263 select HAVE_CLK 264 select COMMON_CLKDEV 265 select ICST307 266 select GENERIC_TIME 267 select GENERIC_CLOCKEVENTS 268 select ARCH_WANT_OPTIONAL_GPIOLIB 269 help 270 This enables support for ARM Ltd Versatile board. 271 272config ARCH_AT91 273 bool "Atmel AT91" 274 select GENERIC_GPIO 275 select ARCH_REQUIRE_GPIOLIB 276 select HAVE_CLK 277 help 278 This enables support for systems based on the Atmel AT91RM9200, 279 AT91SAM9 and AT91CAP9 processors. 280 281config 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_TIME 288 select GENERIC_CLOCKEVENTS 289 select ARCH_WANT_OPTIONAL_GPIOLIB 290 help 291 Support for Broadcom's BCMRing platform. 292 293config ARCH_CLPS711X 294 bool "Cirrus Logic CLPS711x/EP721x-based" 295 select CPU_ARM720T 296 help 297 Support for Cirrus Logic 711x/721x based boards. 298 299config ARCH_GEMINI 300 bool "Cortina Systems Gemini" 301 select CPU_FA526 302 select GENERIC_GPIO 303 select ARCH_REQUIRE_GPIOLIB 304 help 305 Support for the Cortina Systems Gemini family SoCs 306 307config ARCH_EBSA110 308 bool "EBSA-110" 309 select CPU_SA110 310 select ISA 311 select NO_IOPORT 312 help 313 This is an evaluation board for the StrongARM processor available 314 from Digital. It has limited hardware on-board, including an 315 Ethernet interface, two PCMCIA sockets, two serial ports and a 316 parallel port. 317 318config ARCH_EP93XX 319 bool "EP93xx-based" 320 select CPU_ARM920T 321 select ARM_AMBA 322 select ARM_VIC 323 select GENERIC_GPIO 324 select HAVE_CLK 325 select COMMON_CLKDEV 326 select ARCH_REQUIRE_GPIOLIB 327 select ARCH_HAS_HOLES_MEMORYMODEL 328 help 329 This enables support for the Cirrus EP93xx series of CPUs. 330 331config ARCH_FOOTBRIDGE 332 bool "FootBridge" 333 select CPU_SA110 334 select FOOTBRIDGE 335 help 336 Support for systems based on the DC21285 companion chip 337 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 338 339config ARCH_MXC 340 bool "Freescale MXC/iMX-based" 341 select GENERIC_TIME 342 select GENERIC_CLOCKEVENTS 343 select ARCH_REQUIRE_GPIOLIB 344 select HAVE_CLK 345 select COMMON_CLKDEV 346 help 347 Support for Freescale MXC/iMX-based family of processors 348 349config ARCH_STMP3XXX 350 bool "Freescale STMP3xxx" 351 select CPU_ARM926T 352 select HAVE_CLK 353 select COMMON_CLKDEV 354 select ARCH_REQUIRE_GPIOLIB 355 select GENERIC_TIME 356 select GENERIC_CLOCKEVENTS 357 select GENERIC_GPIO 358 select USB_ARCH_HAS_EHCI 359 help 360 Support for systems based on the Freescale 3xxx CPUs. 361 362config ARCH_NETX 363 bool "Hilscher NetX based" 364 select CPU_ARM926T 365 select ARM_VIC 366 select GENERIC_CLOCKEVENTS 367 select GENERIC_TIME 368 help 369 This enables support for systems based on the Hilscher NetX Soc 370 371config ARCH_H720X 372 bool "Hynix HMS720x-based" 373 select CPU_ARM720T 374 select ISA_DMA_API 375 help 376 This enables support for systems based on the Hynix HMS720x 377 378config ARCH_IOP13XX 379 bool "IOP13xx-based" 380 depends on MMU 381 select CPU_XSC3 382 select PLAT_IOP 383 select PCI 384 select ARCH_SUPPORTS_MSI 385 select VMSPLIT_1G 386 help 387 Support for Intel's IOP13XX (XScale) family of processors. 388 389config ARCH_IOP32X 390 bool "IOP32x-based" 391 depends on MMU 392 select CPU_XSCALE 393 select PLAT_IOP 394 select PCI 395 select GENERIC_GPIO 396 select ARCH_REQUIRE_GPIOLIB 397 help 398 Support for Intel's 80219 and IOP32X (XScale) family of 399 processors. 400 401config ARCH_IOP33X 402 bool "IOP33x-based" 403 depends on MMU 404 select CPU_XSCALE 405 select PLAT_IOP 406 select PCI 407 select GENERIC_GPIO 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 help 418 Support for Intel's IXP23xx (XScale) family of processors. 419 420config ARCH_IXP2000 421 bool "IXP2400/2800-based" 422 depends on MMU 423 select CPU_XSCALE 424 select PCI 425 help 426 Support for Intel's IXP2400/2800 (XScale) family of processors. 427 428config ARCH_IXP4XX 429 bool "IXP4xx-based" 430 depends on MMU 431 select CPU_XSCALE 432 select GENERIC_GPIO 433 select GENERIC_TIME 434 select GENERIC_CLOCKEVENTS 435 select DMABOUNCE if PCI 436 help 437 Support for Intel's IXP4XX (XScale) family of processors. 438 439config ARCH_L7200 440 bool "LinkUp-L7200" 441 select CPU_ARM720T 442 select FIQ 443 help 444 Say Y here if you intend to run this kernel on a LinkUp Systems 445 L7200 Software Development Board which uses an ARM720T processor. 446 Information on this board can be obtained at: 447 448 <http://www.linkupsys.com/> 449 450 If you have any questions or comments about the Linux kernel port 451 to this board, send e-mail to <sjhill@cotw.com>. 452 453config ARCH_DOVE 454 bool "Marvell Dove" 455 select PCI 456 select GENERIC_GPIO 457 select ARCH_REQUIRE_GPIOLIB 458 select GENERIC_TIME 459 select GENERIC_CLOCKEVENTS 460 select PLAT_ORION 461 help 462 Support for the Marvell Dove SoC 88AP510 463 464config ARCH_KIRKWOOD 465 bool "Marvell Kirkwood" 466 select CPU_FEROCEON 467 select PCI 468 select GENERIC_GPIO 469 select ARCH_REQUIRE_GPIOLIB 470 select GENERIC_TIME 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 477config ARCH_LOKI 478 bool "Marvell Loki (88RC8480)" 479 select CPU_FEROCEON 480 select GENERIC_TIME 481 select GENERIC_CLOCKEVENTS 482 select PLAT_ORION 483 help 484 Support for the Marvell Loki (88RC8480) SoC. 485 486config ARCH_MV78XX0 487 bool "Marvell MV78xx0" 488 select CPU_FEROCEON 489 select PCI 490 select GENERIC_GPIO 491 select ARCH_REQUIRE_GPIOLIB 492 select GENERIC_TIME 493 select GENERIC_CLOCKEVENTS 494 select PLAT_ORION 495 help 496 Support for the following Marvell MV78xx0 series SoCs: 497 MV781x0, MV782x0. 498 499config ARCH_ORION5X 500 bool "Marvell Orion" 501 depends on MMU 502 select CPU_FEROCEON 503 select PCI 504 select GENERIC_GPIO 505 select ARCH_REQUIRE_GPIOLIB 506 select GENERIC_TIME 507 select GENERIC_CLOCKEVENTS 508 select PLAT_ORION 509 help 510 Support for the following Marvell Orion 5x series SoCs: 511 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 512 Orion-2 (5281), Orion-1-90 (6183). 513 514config ARCH_MMP 515 bool "Marvell PXA168/910/MMP2" 516 depends on MMU 517 select GENERIC_GPIO 518 select ARCH_REQUIRE_GPIOLIB 519 select HAVE_CLK 520 select COMMON_CLKDEV 521 select GENERIC_TIME 522 select GENERIC_CLOCKEVENTS 523 select TICK_ONESHOT 524 select PLAT_PXA 525 help 526 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. 527 528config ARCH_KS8695 529 bool "Micrel/Kendin KS8695" 530 select CPU_ARM922T 531 select GENERIC_GPIO 532 select ARCH_REQUIRE_GPIOLIB 533 help 534 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 535 System-on-Chip devices. 536 537config ARCH_NS9XXX 538 bool "NetSilicon NS9xxx" 539 select CPU_ARM926T 540 select GENERIC_GPIO 541 select GENERIC_TIME 542 select GENERIC_CLOCKEVENTS 543 select HAVE_CLK 544 help 545 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx 546 System. 547 548 <http://www.digi.com/products/microprocessors/index.jsp> 549 550config ARCH_W90X900 551 bool "Nuvoton W90X900 CPU" 552 select CPU_ARM926T 553 select ARCH_REQUIRE_GPIOLIB 554 select GENERIC_GPIO 555 select HAVE_CLK 556 select COMMON_CLKDEV 557 select GENERIC_TIME 558 select GENERIC_CLOCKEVENTS 559 help 560 Support for Nuvoton (Winbond logic dept.) ARM9 processor, 561 At present, the w90x900 has been renamed nuc900, regarding 562 the ARM series product line, you can login the following 563 link address to know more. 564 565 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ 566 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> 567 568config ARCH_NUC93X 569 bool "Nuvoton NUC93X CPU" 570 select CPU_ARM926T 571 select HAVE_CLK 572 select COMMON_CLKDEV 573 help 574 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a 575 low-power and high performance MPEG-4/JPEG multimedia controller chip. 576 577config ARCH_PNX4008 578 bool "Philips Nexperia PNX4008 Mobile" 579 select CPU_ARM926T 580 select HAVE_CLK 581 select COMMON_CLKDEV 582 help 583 This enables support for Philips PNX4008 mobile platform. 584 585config ARCH_PXA 586 bool "PXA2xx/PXA3xx-based" 587 depends on MMU 588 select ARCH_MTD_XIP 589 select ARCH_HAS_CPUFREQ 590 select GENERIC_GPIO 591 select HAVE_CLK 592 select COMMON_CLKDEV 593 select ARCH_REQUIRE_GPIOLIB 594 select GENERIC_TIME 595 select GENERIC_CLOCKEVENTS 596 select TICK_ONESHOT 597 select PLAT_PXA 598 help 599 Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 600 601config ARCH_MSM 602 bool "Qualcomm MSM" 603 select CPU_V6 604 select GENERIC_TIME 605 select GENERIC_CLOCKEVENTS 606 help 607 Support for Qualcomm MSM7K based systems. This runs on the ARM11 608 apps processor of the MSM7K and depends on a shared memory 609 interface to the ARM9 modem processor which runs the baseband stack 610 and controls some vital subsystems (clock and power control, etc). 611 612config ARCH_SHMOBILE 613 bool "Renesas SH-Mobile" 614 help 615 Support for Renesas's SH-Mobile ARM platforms 616 617config ARCH_RPC 618 bool "RiscPC" 619 select ARCH_ACORN 620 select FIQ 621 select TIMER_ACORN 622 select ARCH_MAY_HAVE_PC_FDC 623 select HAVE_PATA_PLATFORM 624 select ISA_DMA_API 625 select NO_IOPORT 626 select ARCH_SPARSEMEM_ENABLE 627 help 628 On the Acorn Risc-PC, Linux can support the internal IDE disk and 629 CD-ROM interface, serial and parallel port, and the floppy drive. 630 631config ARCH_SA1100 632 bool "SA1100-based" 633 select CPU_SA1100 634 select ISA 635 select ARCH_SPARSEMEM_ENABLE 636 select ARCH_MTD_XIP 637 select ARCH_HAS_CPUFREQ 638 select CPU_FREQ 639 select GENERIC_GPIO 640 select GENERIC_TIME 641 select GENERIC_CLOCKEVENTS 642 select HAVE_CLK 643 select TICK_ONESHOT 644 select ARCH_REQUIRE_GPIOLIB 645 help 646 Support for StrongARM 11x0 based boards. 647 648config ARCH_S3C2410 649 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" 650 select GENERIC_GPIO 651 select ARCH_HAS_CPUFREQ 652 select HAVE_CLK 653 help 654 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 655 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 656 the Samsung SMDK2410 development board (and derivatives). 657 658config ARCH_S3C64XX 659 bool "Samsung S3C64XX" 660 select PLAT_SAMSUNG 661 select CPU_V6 662 select GENERIC_GPIO 663 select ARM_VIC 664 select HAVE_CLK 665 select NO_IOPORT 666 select ARCH_HAS_CPUFREQ 667 select ARCH_REQUIRE_GPIOLIB 668 select SAMSUNG_CLKSRC 669 select SAMSUNG_IRQ_VIC_TIMER 670 select SAMSUNG_IRQ_UART 671 select S3C_GPIO_TRACK 672 select S3C_GPIO_PULL_UPDOWN 673 select S3C_GPIO_CFG_S3C24XX 674 select S3C_GPIO_CFG_S3C64XX 675 select S3C_DEV_NAND 676 select USB_ARCH_HAS_OHCI 677 select SAMSUNG_GPIOLIB_4BIT 678 help 679 Samsung S3C64XX series based systems 680 681config ARCH_S5P6440 682 bool "Samsung S5P6440" 683 select CPU_V6 684 select GENERIC_GPIO 685 select HAVE_CLK 686 help 687 Samsung S5P6440 CPU based systems 688 689config ARCH_S5P6442 690 bool "Samsung S5P6442" 691 select CPU_V6 692 select GENERIC_GPIO 693 select HAVE_CLK 694 help 695 Samsung S5P6442 CPU based systems 696 697config ARCH_S5PC1XX 698 bool "Samsung S5PC1XX" 699 select GENERIC_GPIO 700 select HAVE_CLK 701 select CPU_V7 702 select ARM_L1_CACHE_SHIFT_6 703 help 704 Samsung S5PC1XX series based systems 705 706config ARCH_S5PV210 707 bool "Samsung S5PV210/S5PC110" 708 select CPU_V7 709 select GENERIC_GPIO 710 select HAVE_CLK 711 select ARM_L1_CACHE_SHIFT_6 712 help 713 Samsung S5PV210/S5PC110 series based systems 714 715config ARCH_SHARK 716 bool "Shark" 717 select CPU_SA110 718 select ISA 719 select ISA_DMA 720 select ZONE_DMA 721 select PCI 722 help 723 Support for the StrongARM based Digital DNARD machine, also known 724 as "Shark" (<http://www.shark-linux.de/shark.html>). 725 726config ARCH_LH7A40X 727 bool "Sharp LH7A40X" 728 select CPU_ARM922T 729 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM 730 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM 731 help 732 Say Y here for systems based on one of the Sharp LH7A40X 733 System on a Chip processors. These CPUs include an ARM922T 734 core with a wide array of integrated devices for 735 hand-held and low-power applications. 736 737config ARCH_U300 738 bool "ST-Ericsson U300 Series" 739 depends on MMU 740 select CPU_ARM926T 741 select HAVE_TCM 742 select ARM_AMBA 743 select ARM_VIC 744 select GENERIC_TIME 745 select GENERIC_CLOCKEVENTS 746 select HAVE_CLK 747 select COMMON_CLKDEV 748 select GENERIC_GPIO 749 help 750 Support for ST-Ericsson U300 series mobile platforms. 751 752config ARCH_U8500 753 bool "ST-Ericsson U8500 Series" 754 select CPU_V7 755 select ARM_AMBA 756 select GENERIC_TIME 757 select GENERIC_CLOCKEVENTS 758 select COMMON_CLKDEV 759 help 760 Support for ST-Ericsson's Ux500 architecture 761 762config ARCH_NOMADIK 763 bool "STMicroelectronics Nomadik" 764 select ARM_AMBA 765 select ARM_VIC 766 select CPU_ARM926T 767 select HAVE_CLK 768 select COMMON_CLKDEV 769 select GENERIC_TIME 770 select GENERIC_CLOCKEVENTS 771 select GENERIC_GPIO 772 select ARCH_REQUIRE_GPIOLIB 773 help 774 Support for the Nomadik platform by ST-Ericsson 775 776config ARCH_DAVINCI 777 bool "TI DaVinci" 778 select CPU_ARM926T 779 select GENERIC_TIME 780 select GENERIC_CLOCKEVENTS 781 select GENERIC_GPIO 782 select ARCH_REQUIRE_GPIOLIB 783 select HAVE_CLK 784 select ZONE_DMA 785 select HAVE_IDE 786 select COMMON_CLKDEV 787 select GENERIC_ALLOCATOR 788 select ARCH_HAS_HOLES_MEMORYMODEL 789 help 790 Support for TI's DaVinci platform. 791 792config ARCH_OMAP 793 bool "TI OMAP" 794 select GENERIC_GPIO 795 select HAVE_CLK 796 select ARCH_REQUIRE_GPIOLIB 797 select ARCH_HAS_CPUFREQ 798 select GENERIC_TIME 799 select GENERIC_CLOCKEVENTS 800 select ARCH_HAS_HOLES_MEMORYMODEL 801 help 802 Support for TI's OMAP platform (OMAP1 and OMAP2). 803 804endchoice 805 806# 807# This is sorted alphabetically by mach-* pathname. However, plat-* 808# Kconfigs may be included either alphabetically (according to the 809# plat- suffix) or along side the corresponding mach-* source. 810# 811source "arch/arm/mach-aaec2000/Kconfig" 812 813source "arch/arm/mach-at91/Kconfig" 814 815source "arch/arm/mach-bcmring/Kconfig" 816 817source "arch/arm/mach-clps711x/Kconfig" 818 819source "arch/arm/mach-davinci/Kconfig" 820 821source "arch/arm/mach-dove/Kconfig" 822 823source "arch/arm/mach-ep93xx/Kconfig" 824 825source "arch/arm/mach-footbridge/Kconfig" 826 827source "arch/arm/mach-gemini/Kconfig" 828 829source "arch/arm/mach-h720x/Kconfig" 830 831source "arch/arm/mach-integrator/Kconfig" 832 833source "arch/arm/mach-iop32x/Kconfig" 834 835source "arch/arm/mach-iop33x/Kconfig" 836 837source "arch/arm/mach-iop13xx/Kconfig" 838 839source "arch/arm/mach-ixp4xx/Kconfig" 840 841source "arch/arm/mach-ixp2000/Kconfig" 842 843source "arch/arm/mach-ixp23xx/Kconfig" 844 845source "arch/arm/mach-kirkwood/Kconfig" 846 847source "arch/arm/mach-ks8695/Kconfig" 848 849source "arch/arm/mach-lh7a40x/Kconfig" 850 851source "arch/arm/mach-loki/Kconfig" 852 853source "arch/arm/mach-msm/Kconfig" 854 855source "arch/arm/mach-mv78xx0/Kconfig" 856 857source "arch/arm/plat-mxc/Kconfig" 858 859source "arch/arm/mach-netx/Kconfig" 860 861source "arch/arm/mach-nomadik/Kconfig" 862source "arch/arm/plat-nomadik/Kconfig" 863 864source "arch/arm/mach-ns9xxx/Kconfig" 865 866source "arch/arm/mach-nuc93x/Kconfig" 867 868source "arch/arm/plat-omap/Kconfig" 869 870source "arch/arm/mach-omap1/Kconfig" 871 872source "arch/arm/mach-omap2/Kconfig" 873 874source "arch/arm/mach-orion5x/Kconfig" 875 876source "arch/arm/mach-pxa/Kconfig" 877source "arch/arm/plat-pxa/Kconfig" 878 879source "arch/arm/mach-mmp/Kconfig" 880 881source "arch/arm/mach-realview/Kconfig" 882 883source "arch/arm/mach-sa1100/Kconfig" 884 885source "arch/arm/plat-samsung/Kconfig" 886source "arch/arm/plat-s3c24xx/Kconfig" 887source "arch/arm/plat-s5p/Kconfig" 888source "arch/arm/plat-s5pc1xx/Kconfig" 889 890if ARCH_S3C2410 891source "arch/arm/mach-s3c2400/Kconfig" 892source "arch/arm/mach-s3c2410/Kconfig" 893source "arch/arm/mach-s3c2412/Kconfig" 894source "arch/arm/mach-s3c2440/Kconfig" 895source "arch/arm/mach-s3c2443/Kconfig" 896endif 897 898if ARCH_S3C64XX 899source "arch/arm/mach-s3c64xx/Kconfig" 900endif 901 902source "arch/arm/mach-s5p6440/Kconfig" 903 904source "arch/arm/mach-s5p6442/Kconfig" 905 906if ARCH_S5PC1XX 907source "arch/arm/mach-s5pc100/Kconfig" 908endif 909 910source "arch/arm/mach-s5pv210/Kconfig" 911 912source "arch/arm/mach-shmobile/Kconfig" 913 914source "arch/arm/plat-stmp3xxx/Kconfig" 915 916source "arch/arm/mach-u300/Kconfig" 917 918source "arch/arm/mach-ux500/Kconfig" 919 920source "arch/arm/mach-versatile/Kconfig" 921 922source "arch/arm/mach-w90x900/Kconfig" 923 924# Definitions to make life easier 925config ARCH_ACORN 926 bool 927 928config PLAT_IOP 929 bool 930 select GENERIC_CLOCKEVENTS 931 select GENERIC_TIME 932 933config PLAT_ORION 934 bool 935 936config PLAT_PXA 937 bool 938 939source arch/arm/mm/Kconfig 940 941config IWMMXT 942 bool "Enable iWMMXt support" 943 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK 944 default y if PXA27x || PXA3xx || ARCH_MMP 945 help 946 Enable support for iWMMXt context switching at run time if 947 running on a CPU that supports it. 948 949# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 950config XSCALE_PMU 951 bool 952 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 953 default y 954 955config CPU_HAS_PMU 956 depends on CPU_V6 || CPU_V7 || XSCALE_PMU 957 default y 958 bool 959 960if !MMU 961source "arch/arm/Kconfig-nommu" 962endif 963 964config ARM_ERRATA_411920 965 bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 966 depends on CPU_V6 && !SMP 967 help 968 Invalidation of the Instruction Cache operation can 969 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 970 It does not affect the MPCore. This option enables the ARM Ltd. 971 recommended workaround. 972 973config ARM_ERRATA_430973 974 bool "ARM errata: Stale prediction on replaced interworking branch" 975 depends on CPU_V7 976 help 977 This option enables the workaround for the 430973 Cortex-A8 978 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 979 interworking branch is replaced with another code sequence at the 980 same virtual address, whether due to self-modifying code or virtual 981 to physical address re-mapping, Cortex-A8 does not recover from the 982 stale interworking branch prediction. This results in Cortex-A8 983 executing the new code sequence in the incorrect ARM or Thumb state. 984 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 985 and also flushes the branch target cache at every context switch. 986 Note that setting specific bits in the ACTLR register may not be 987 available in non-secure mode. 988 989config ARM_ERRATA_458693 990 bool "ARM errata: Processor deadlock when a false hazard is created" 991 depends on CPU_V7 992 help 993 This option enables the workaround for the 458693 Cortex-A8 (r2p0) 994 erratum. For very specific sequences of memory operations, it is 995 possible for a hazard condition intended for a cache line to instead 996 be incorrectly associated with a different cache line. This false 997 hazard might then cause a processor deadlock. The workaround enables 998 the L1 caching of the NEON accesses and disables the PLD instruction 999 in the ACTLR register. Note that setting specific bits in the ACTLR 1000 register may not be available in non-secure mode. 1001 1002config ARM_ERRATA_460075 1003 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 1004 depends on CPU_V7 1005 help 1006 This option enables the workaround for the 460075 Cortex-A8 (r2p0) 1007 erratum. Any asynchronous access to the L2 cache may encounter a 1008 situation in which recent store transactions to the L2 cache are lost 1009 and overwritten with stale memory contents from external memory. The 1010 workaround disables the write-allocate mode for the L2 cache via the 1011 ACTLR register. Note that setting specific bits in the ACTLR register 1012 may not be available in non-secure mode. 1013 1014config PL310_ERRATA_588369 1015 bool "Clean & Invalidate maintenance operations do not invalidate clean lines" 1016 depends on CACHE_L2X0 && ARCH_OMAP4 1017 help 1018 The PL310 L2 cache controller implements three types of Clean & 1019 Invalidate maintenance operations: by Physical Address 1020 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC). 1021 They are architecturally defined to behave as the execution of a 1022 clean operation followed immediately by an invalidate operation, 1023 both performing to the same memory location. This functionality 1024 is not correctly implemented in PL310 as clean lines are not 1025 invalidated as a result of these operations. Note that this errata 1026 uses Texas Instrument's secure monitor api. 1027endmenu 1028 1029source "arch/arm/common/Kconfig" 1030 1031config FORCE_MAX_ZONEORDER 1032 int 1033 depends on SA1111 1034 default "9" 1035 1036menu "Bus support" 1037 1038config ARM_AMBA 1039 bool 1040 1041config ISA 1042 bool 1043 help 1044 Find out whether you have ISA slots on your motherboard. ISA is the 1045 name of a bus system, i.e. the way the CPU talks to the other stuff 1046 inside your box. Other bus systems are PCI, EISA, MicroChannel 1047 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 1048 newer boards don't support it. If you have ISA, say Y, otherwise N. 1049 1050# Select ISA DMA controller support 1051config ISA_DMA 1052 bool 1053 select ISA_DMA_API 1054 1055# Select ISA DMA interface 1056config ISA_DMA_API 1057 bool 1058 1059config PCI 1060 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE 1061 help 1062 Find out whether you have a PCI motherboard. PCI is the name of a 1063 bus system, i.e. the way the CPU talks to the other stuff inside 1064 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 1065 VESA. If you have PCI, say Y, otherwise N. 1066 1067config PCI_SYSCALL 1068 def_bool PCI 1069 1070# Select the host bridge type 1071config PCI_HOST_VIA82C505 1072 bool 1073 depends on PCI && ARCH_SHARK 1074 default y 1075 1076config PCI_HOST_ITE8152 1077 bool 1078 depends on PCI && MACH_ARMCORE 1079 default y 1080 select DMABOUNCE 1081 1082source "drivers/pci/Kconfig" 1083 1084source "drivers/pcmcia/Kconfig" 1085 1086endmenu 1087 1088menu "Kernel Features" 1089 1090source "kernel/time/Kconfig" 1091 1092config SMP 1093 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 1094 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\ 1095 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500) 1096 depends on GENERIC_CLOCKEVENTS 1097 select USE_GENERIC_SMP_HELPERS 1098 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500) 1099 help 1100 This enables support for systems with more than one CPU. If you have 1101 a system with only one CPU, like most personal computers, say N. If 1102 you have a system with more than one CPU, say Y. 1103 1104 If you say N here, the kernel will run on single and multiprocessor 1105 machines, but will use only one CPU of a multiprocessor machine. If 1106 you say Y here, the kernel will run on many, but not all, single 1107 processor machines. On a single processor machine, the kernel will 1108 run faster if you say N here. 1109 1110 See also <file:Documentation/i386/IO-APIC.txt>, 1111 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 1112 <http://www.linuxdoc.org/docs.html#howto>. 1113 1114 If you don't know what to do here, say N. 1115 1116config HAVE_ARM_SCU 1117 bool 1118 depends on SMP 1119 help 1120 This option enables support for the ARM system coherency unit 1121 1122config HAVE_ARM_TWD 1123 bool 1124 depends on SMP 1125 help 1126 This options enables support for the ARM timer and watchdog unit 1127 1128choice 1129 prompt "Memory split" 1130 default VMSPLIT_3G 1131 help 1132 Select the desired split between kernel and user memory. 1133 1134 If you are not absolutely sure what you are doing, leave this 1135 option alone! 1136 1137 config VMSPLIT_3G 1138 bool "3G/1G user/kernel split" 1139 config VMSPLIT_2G 1140 bool "2G/2G user/kernel split" 1141 config VMSPLIT_1G 1142 bool "1G/3G user/kernel split" 1143endchoice 1144 1145config PAGE_OFFSET 1146 hex 1147 default 0x40000000 if VMSPLIT_1G 1148 default 0x80000000 if VMSPLIT_2G 1149 default 0xC0000000 1150 1151config NR_CPUS 1152 int "Maximum number of CPUs (2-32)" 1153 range 2 32 1154 depends on SMP 1155 default "4" 1156 1157config HOTPLUG_CPU 1158 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 1159 depends on SMP && HOTPLUG && EXPERIMENTAL 1160 help 1161 Say Y here to experiment with turning CPUs off and on. CPUs 1162 can be controlled through /sys/devices/system/cpu. 1163 1164config LOCAL_TIMERS 1165 bool "Use local timer interrupts" 1166 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \ 1167 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500) 1168 default y 1169 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500) 1170 help 1171 Enable support for local timers on SMP platforms, rather then the 1172 legacy IPI broadcast method. Local timers allows the system 1173 accounting to be spread across the timer interval, preventing a 1174 "thundering herd" at every timer tick. 1175 1176source kernel/Kconfig.preempt 1177 1178config HZ 1179 int 1180 default 128 if ARCH_L7200 1181 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210 1182 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 1183 default AT91_TIMER_HZ if ARCH_AT91 1184 default 100 1185 1186config THUMB2_KERNEL 1187 bool "Compile the kernel in Thumb-2 mode" 1188 depends on CPU_V7 && EXPERIMENTAL 1189 select AEABI 1190 select ARM_ASM_UNIFIED 1191 help 1192 By enabling this option, the kernel will be compiled in 1193 Thumb-2 mode. A compiler/assembler that understand the unified 1194 ARM-Thumb syntax is needed. 1195 1196 If unsure, say N. 1197 1198config ARM_ASM_UNIFIED 1199 bool 1200 1201config AEABI 1202 bool "Use the ARM EABI to compile the kernel" 1203 help 1204 This option allows for the kernel to be compiled using the latest 1205 ARM ABI (aka EABI). This is only useful if you are using a user 1206 space environment that is also compiled with EABI. 1207 1208 Since there are major incompatibilities between the legacy ABI and 1209 EABI, especially with regard to structure member alignment, this 1210 option also changes the kernel syscall calling convention to 1211 disambiguate both ABIs and allow for backward compatibility support 1212 (selected with CONFIG_OABI_COMPAT). 1213 1214 To use this you need GCC version 4.0.0 or later. 1215 1216config OABI_COMPAT 1217 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 1218 depends on AEABI && EXPERIMENTAL 1219 default y 1220 help 1221 This option preserves the old syscall interface along with the 1222 new (ARM EABI) one. It also provides a compatibility layer to 1223 intercept syscalls that have structure arguments which layout 1224 in memory differs between the legacy ABI and the new ARM EABI 1225 (only for non "thumb" binaries). This option adds a tiny 1226 overhead to all syscalls and produces a slightly larger kernel. 1227 If you know you'll be using only pure EABI user space then you 1228 can say N here. If this option is not selected and you attempt 1229 to execute a legacy ABI binary then the result will be 1230 UNPREDICTABLE (in fact it can be predicted that it won't work 1231 at all). If in doubt say Y. 1232 1233config ARCH_HAS_HOLES_MEMORYMODEL 1234 bool 1235 1236# Discontigmem is deprecated 1237config ARCH_DISCONTIGMEM_ENABLE 1238 bool 1239 1240config ARCH_SPARSEMEM_ENABLE 1241 bool 1242 1243config ARCH_SPARSEMEM_DEFAULT 1244 def_bool ARCH_SPARSEMEM_ENABLE 1245 1246config ARCH_SELECT_MEMORY_MODEL 1247 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE 1248 1249config NODES_SHIFT 1250 int 1251 default "4" if ARCH_LH7A40X 1252 default "2" 1253 depends on NEED_MULTIPLE_NODES 1254 1255config HIGHMEM 1256 bool "High Memory Support (EXPERIMENTAL)" 1257 depends on MMU && EXPERIMENTAL 1258 help 1259 The address space of ARM processors is only 4 Gigabytes large 1260 and it has to accommodate user address space, kernel address 1261 space as well as some memory mapped IO. That means that, if you 1262 have a large amount of physical memory and/or IO, not all of the 1263 memory can be "permanently mapped" by the kernel. The physical 1264 memory that is not permanently mapped is called "high memory". 1265 1266 Depending on the selected kernel/user memory split, minimum 1267 vmalloc space and actual amount of RAM, you may not need this 1268 option which should result in a slightly faster kernel. 1269 1270 If unsure, say n. 1271 1272config HIGHPTE 1273 bool "Allocate 2nd-level pagetables from highmem" 1274 depends on HIGHMEM 1275 depends on !OUTER_CACHE 1276 1277config HW_PERF_EVENTS 1278 bool "Enable hardware performance counter support for perf events" 1279 depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7) 1280 default y 1281 help 1282 Enable hardware performance counter support for perf events. If 1283 disabled, perf events will use software events only. 1284 1285source "mm/Kconfig" 1286 1287config LEDS 1288 bool "Timer and CPU usage LEDs" 1289 depends on ARCH_CDB89712 || ARCH_EBSA110 || \ 1290 ARCH_EBSA285 || ARCH_INTEGRATOR || \ 1291 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 1292 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 1293 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 1294 ARCH_AT91 || ARCH_DAVINCI || \ 1295 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW 1296 help 1297 If you say Y here, the LEDs on your machine will be used 1298 to provide useful information about your current system status. 1299 1300 If you are compiling a kernel for a NetWinder or EBSA-285, you will 1301 be able to select which LEDs are active using the options below. If 1302 you are compiling a kernel for the EBSA-110 or the LART however, the 1303 red LED will simply flash regularly to indicate that the system is 1304 still functional. It is safe to say Y here if you have a CATS 1305 system, but the driver will do nothing. 1306 1307config LEDS_TIMER 1308 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 1309 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1310 || MACH_OMAP_PERSEUS2 1311 depends on LEDS 1312 depends on !GENERIC_CLOCKEVENTS 1313 default y if ARCH_EBSA110 1314 help 1315 If you say Y here, one of the system LEDs (the green one on the 1316 NetWinder, the amber one on the EBSA285, or the red one on the LART) 1317 will flash regularly to indicate that the system is still 1318 operational. This is mainly useful to kernel hackers who are 1319 debugging unstable kernels. 1320 1321 The LART uses the same LED for both Timer LED and CPU usage LED 1322 functions. You may choose to use both, but the Timer LED function 1323 will overrule the CPU usage LED. 1324 1325config LEDS_CPU 1326 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 1327 !ARCH_OMAP) \ 1328 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1329 || MACH_OMAP_PERSEUS2 1330 depends on LEDS 1331 help 1332 If you say Y here, the red LED will be used to give a good real 1333 time indication of CPU usage, by lighting whenever the idle task 1334 is not currently executing. 1335 1336 The LART uses the same LED for both Timer LED and CPU usage LED 1337 functions. You may choose to use both, but the Timer LED function 1338 will overrule the CPU usage LED. 1339 1340config ALIGNMENT_TRAP 1341 bool 1342 depends on CPU_CP15_MMU 1343 default y if !ARCH_EBSA110 1344 select HAVE_PROC_CPU if PROC_FS 1345 help 1346 ARM processors cannot fetch/store information which is not 1347 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 1348 address divisible by 4. On 32-bit ARM processors, these non-aligned 1349 fetch/store instructions will be emulated in software if you say 1350 here, which has a severe performance impact. This is necessary for 1351 correct operation of some network protocols. With an IP-only 1352 configuration it is safe to say N, otherwise say Y. 1353 1354config UACCESS_WITH_MEMCPY 1355 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)" 1356 depends on MMU && EXPERIMENTAL 1357 default y if CPU_FEROCEON 1358 help 1359 Implement faster copy_to_user and clear_user methods for CPU 1360 cores where a 8-word STM instruction give significantly higher 1361 memory write throughput than a sequence of individual 32bit stores. 1362 1363 A possible side effect is a slight increase in scheduling latency 1364 between threads sharing the same address space if they invoke 1365 such copy operations with large buffers. 1366 1367 However, if the CPU data cache is using a write-allocate mode, 1368 this option is unlikely to provide any performance gain. 1369 1370endmenu 1371 1372menu "Boot options" 1373 1374# Compressed boot loader in ROM. Yes, we really want to ask about 1375# TEXT and BSS so we preserve their values in the config files. 1376config ZBOOT_ROM_TEXT 1377 hex "Compressed ROM boot loader base address" 1378 default "0" 1379 help 1380 The physical address at which the ROM-able zImage is to be 1381 placed in the target. Platforms which normally make use of 1382 ROM-able zImage formats normally set this to a suitable 1383 value in their defconfig file. 1384 1385 If ZBOOT_ROM is not enabled, this has no effect. 1386 1387config ZBOOT_ROM_BSS 1388 hex "Compressed ROM boot loader BSS address" 1389 default "0" 1390 help 1391 The base address of an area of read/write memory in the target 1392 for the ROM-able zImage which must be available while the 1393 decompressor is running. It must be large enough to hold the 1394 entire decompressed kernel plus an additional 128 KiB. 1395 Platforms which normally make use of ROM-able zImage formats 1396 normally set this to a suitable value in their defconfig file. 1397 1398 If ZBOOT_ROM is not enabled, this has no effect. 1399 1400config ZBOOT_ROM 1401 bool "Compressed boot loader in ROM/flash" 1402 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 1403 help 1404 Say Y here if you intend to execute your compressed kernel image 1405 (zImage) directly from ROM or flash. If unsure, say N. 1406 1407config CMDLINE 1408 string "Default kernel command string" 1409 default "" 1410 help 1411 On some architectures (EBSA110 and CATS), there is currently no way 1412 for the boot loader to pass arguments to the kernel. For these 1413 architectures, you should supply some command-line options at build 1414 time by entering them here. As a minimum, you should specify the 1415 memory size and the root device (e.g., mem=64M root=/dev/nfs). 1416 1417config XIP_KERNEL 1418 bool "Kernel Execute-In-Place from ROM" 1419 depends on !ZBOOT_ROM 1420 help 1421 Execute-In-Place allows the kernel to run from non-volatile storage 1422 directly addressable by the CPU, such as NOR flash. This saves RAM 1423 space since the text section of the kernel is not loaded from flash 1424 to RAM. Read-write sections, such as the data section and stack, 1425 are still copied to RAM. The XIP kernel is not compressed since 1426 it has to run directly from flash, so it will take more space to 1427 store it. The flash address used to link the kernel object files, 1428 and for storing it, is configuration dependent. Therefore, if you 1429 say Y here, you must know the proper physical address where to 1430 store the kernel image depending on your own flash memory usage. 1431 1432 Also note that the make target becomes "make xipImage" rather than 1433 "make zImage" or "make Image". The final kernel binary to put in 1434 ROM memory will be arch/arm/boot/xipImage. 1435 1436 If unsure, say N. 1437 1438config XIP_PHYS_ADDR 1439 hex "XIP Kernel Physical Location" 1440 depends on XIP_KERNEL 1441 default "0x00080000" 1442 help 1443 This is the physical address in your flash memory the kernel will 1444 be linked for and stored to. This address is dependent on your 1445 own flash usage. 1446 1447config KEXEC 1448 bool "Kexec system call (EXPERIMENTAL)" 1449 depends on EXPERIMENTAL 1450 help 1451 kexec is a system call that implements the ability to shutdown your 1452 current kernel, and to start another kernel. It is like a reboot 1453 but it is independent of the system firmware. And like a reboot 1454 you can start any kernel with it, not just Linux. 1455 1456 It is an ongoing process to be certain the hardware in a machine 1457 is properly shutdown, so do not be surprised if this code does not 1458 initially work for you. It may help to enable device hotplugging 1459 support. 1460 1461config ATAGS_PROC 1462 bool "Export atags in procfs" 1463 depends on KEXEC 1464 default y 1465 help 1466 Should the atags used to boot the kernel be exported in an "atags" 1467 file in procfs. Useful with kexec. 1468 1469endmenu 1470 1471menu "CPU Power Management" 1472 1473if ARCH_HAS_CPUFREQ 1474 1475source "drivers/cpufreq/Kconfig" 1476 1477config CPU_FREQ_SA1100 1478 bool 1479 1480config CPU_FREQ_SA1110 1481 bool 1482 1483config CPU_FREQ_INTEGRATOR 1484 tristate "CPUfreq driver for ARM Integrator CPUs" 1485 depends on ARCH_INTEGRATOR && CPU_FREQ 1486 default y 1487 help 1488 This enables the CPUfreq driver for ARM Integrator CPUs. 1489 1490 For details, take a look at <file:Documentation/cpu-freq>. 1491 1492 If in doubt, say Y. 1493 1494config CPU_FREQ_PXA 1495 bool 1496 depends on CPU_FREQ && ARCH_PXA && PXA25x 1497 default y 1498 select CPU_FREQ_DEFAULT_GOV_USERSPACE 1499 1500config CPU_FREQ_S3C64XX 1501 bool "CPUfreq support for Samsung S3C64XX CPUs" 1502 depends on CPU_FREQ && CPU_S3C6410 1503 1504config CPU_FREQ_S3C 1505 bool 1506 help 1507 Internal configuration node for common cpufreq on Samsung SoC 1508 1509config CPU_FREQ_S3C24XX 1510 bool "CPUfreq driver for Samsung S3C24XX series CPUs" 1511 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL 1512 select CPU_FREQ_S3C 1513 help 1514 This enables the CPUfreq driver for the Samsung S3C24XX family 1515 of CPUs. 1516 1517 For details, take a look at <file:Documentation/cpu-freq>. 1518 1519 If in doubt, say N. 1520 1521config CPU_FREQ_S3C24XX_PLL 1522 bool "Support CPUfreq changing of PLL frequency" 1523 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL 1524 help 1525 Compile in support for changing the PLL frequency from the 1526 S3C24XX series CPUfreq driver. The PLL takes time to settle 1527 after a frequency change, so by default it is not enabled. 1528 1529 This also means that the PLL tables for the selected CPU(s) will 1530 be built which may increase the size of the kernel image. 1531 1532config CPU_FREQ_S3C24XX_DEBUG 1533 bool "Debug CPUfreq Samsung driver core" 1534 depends on CPU_FREQ_S3C24XX 1535 help 1536 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core 1537 1538config CPU_FREQ_S3C24XX_IODEBUG 1539 bool "Debug CPUfreq Samsung driver IO timing" 1540 depends on CPU_FREQ_S3C24XX 1541 help 1542 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core 1543 1544config CPU_FREQ_S3C24XX_DEBUGFS 1545 bool "Export debugfs for CPUFreq" 1546 depends on CPU_FREQ_S3C24XX && DEBUG_FS 1547 help 1548 Export status information via debugfs. 1549 1550endif 1551 1552source "drivers/cpuidle/Kconfig" 1553 1554endmenu 1555 1556menu "Floating point emulation" 1557 1558comment "At least one emulation must be selected" 1559 1560config FPE_NWFPE 1561 bool "NWFPE math emulation" 1562 depends on !AEABI || OABI_COMPAT 1563 ---help--- 1564 Say Y to include the NWFPE floating point emulator in the kernel. 1565 This is necessary to run most binaries. Linux does not currently 1566 support floating point hardware so you need to say Y here even if 1567 your machine has an FPA or floating point co-processor podule. 1568 1569 You may say N here if you are going to load the Acorn FPEmulator 1570 early in the bootup. 1571 1572config FPE_NWFPE_XP 1573 bool "Support extended precision" 1574 depends on FPE_NWFPE 1575 help 1576 Say Y to include 80-bit support in the kernel floating-point 1577 emulator. Otherwise, only 32 and 64-bit support is compiled in. 1578 Note that gcc does not generate 80-bit operations by default, 1579 so in most cases this option only enlarges the size of the 1580 floating point emulator without any good reason. 1581 1582 You almost surely want to say N here. 1583 1584config FPE_FASTFPE 1585 bool "FastFPE math emulation (EXPERIMENTAL)" 1586 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 1587 ---help--- 1588 Say Y here to include the FAST floating point emulator in the kernel. 1589 This is an experimental much faster emulator which now also has full 1590 precision for the mantissa. It does not support any exceptions. 1591 It is very simple, and approximately 3-6 times faster than NWFPE. 1592 1593 It should be sufficient for most programs. It may be not suitable 1594 for scientific calculations, but you have to check this for yourself. 1595 If you do not feel you need a faster FP emulation you should better 1596 choose NWFPE. 1597 1598config VFP 1599 bool "VFP-format floating point maths" 1600 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 1601 help 1602 Say Y to include VFP support code in the kernel. This is needed 1603 if your hardware includes a VFP unit. 1604 1605 Please see <file:Documentation/arm/VFP/release-notes.txt> for 1606 release notes and additional status information. 1607 1608 Say N if your target does not have VFP hardware. 1609 1610config VFPv3 1611 bool 1612 depends on VFP 1613 default y if CPU_V7 1614 1615config NEON 1616 bool "Advanced SIMD (NEON) Extension support" 1617 depends on VFPv3 && CPU_V7 1618 help 1619 Say Y to include support code for NEON, the ARMv7 Advanced SIMD 1620 Extension. 1621 1622endmenu 1623 1624menu "Userspace binary formats" 1625 1626source "fs/Kconfig.binfmt" 1627 1628config ARTHUR 1629 tristate "RISC OS personality" 1630 depends on !AEABI 1631 help 1632 Say Y here to include the kernel code necessary if you want to run 1633 Acorn RISC OS/Arthur binaries under Linux. This code is still very 1634 experimental; if this sounds frightening, say N and sleep in peace. 1635 You can also say M here to compile this support as a module (which 1636 will be called arthur). 1637 1638endmenu 1639 1640menu "Power management options" 1641 1642source "kernel/power/Kconfig" 1643 1644config ARCH_SUSPEND_POSSIBLE 1645 def_bool y 1646 1647endmenu 1648 1649source "net/Kconfig" 1650 1651source "drivers/Kconfig" 1652 1653source "fs/Kconfig" 1654 1655source "arch/arm/Kconfig.debug" 1656 1657source "security/Kconfig" 1658 1659source "crypto/Kconfig" 1660 1661source "lib/Kconfig" 1662