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 HAVE_OPROFILE 16 select HAVE_ARCH_KGDB 17 select HAVE_KPROBES if (!XIP_KERNEL) 18 select HAVE_KRETPROBES if (HAVE_KPROBES) 19 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 20 select HAVE_GENERIC_DMA_COHERENT 21 help 22 The ARM series is a line of low-power-consumption RISC chip designs 23 licensed by ARM Ltd and targeted at embedded applications and 24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 25 manufactured, but legacy ARM-based PC hardware remains popular in 26 Europe. There is an ARM Linux project with a web page at 27 <http://www.arm.linux.org.uk/>. 28 29config HAVE_PWM 30 bool 31 32config SYS_SUPPORTS_APM_EMULATION 33 bool 34 35config GENERIC_GPIO 36 bool 37 default n 38 39config GENERIC_TIME 40 bool 41 default n 42 43config GENERIC_CLOCKEVENTS 44 bool 45 default n 46 47config GENERIC_CLOCKEVENTS_BROADCAST 48 bool 49 depends on GENERIC_CLOCKEVENTS 50 default y if SMP && !LOCAL_TIMERS 51 52config MMU 53 bool 54 default y 55 56config NO_IOPORT 57 bool 58 default n 59 60config EISA 61 bool 62 ---help--- 63 The Extended Industry Standard Architecture (EISA) bus was 64 developed as an open alternative to the IBM MicroChannel bus. 65 66 The EISA bus provided some of the features of the IBM MicroChannel 67 bus while maintaining backward compatibility with cards made for 68 the older ISA bus. The EISA bus saw limited use between 1988 and 69 1995 when it was made obsolete by the PCI bus. 70 71 Say Y here if you are building a kernel for an EISA-based machine. 72 73 Otherwise, say N. 74 75config SBUS 76 bool 77 78config MCA 79 bool 80 help 81 MicroChannel Architecture is found in some IBM PS/2 machines and 82 laptops. It is a bus system similar to PCI or ISA. See 83 <file:Documentation/mca.txt> (and especially the web page given 84 there) before attempting to build an MCA bus kernel. 85 86config GENERIC_HARDIRQS 87 bool 88 default y 89 90config STACKTRACE_SUPPORT 91 bool 92 default y 93 94config HAVE_LATENCYTOP_SUPPORT 95 bool 96 depends on !SMP 97 default y 98 99config LOCKDEP_SUPPORT 100 bool 101 default y 102 103config TRACE_IRQFLAGS_SUPPORT 104 bool 105 default y 106 107config HARDIRQS_SW_RESEND 108 bool 109 default y 110 111config GENERIC_IRQ_PROBE 112 bool 113 default y 114 115config GENERIC_LOCKBREAK 116 bool 117 default y 118 depends on SMP && PREEMPT 119 120config RWSEM_GENERIC_SPINLOCK 121 bool 122 default y 123 124config RWSEM_XCHGADD_ALGORITHM 125 bool 126 127config ARCH_HAS_ILOG2_U32 128 bool 129 default n 130 131config ARCH_HAS_ILOG2_U64 132 bool 133 default n 134 135config GENERIC_HWEIGHT 136 bool 137 default y 138 139config GENERIC_CALIBRATE_DELAY 140 bool 141 default y 142 143config ARCH_MAY_HAVE_PC_FDC 144 bool 145 146config ZONE_DMA 147 bool 148 149config GENERIC_ISA_DMA 150 bool 151 152config FIQ 153 bool 154 155config ARCH_MTD_XIP 156 bool 157 158config GENERIC_HARDIRQS_NO__DO_IRQ 159 def_bool y 160 161if OPROFILE 162 163config OPROFILE_ARMV6 164 def_bool y 165 depends on CPU_V6 && !SMP 166 select OPROFILE_ARM11_CORE 167 168config OPROFILE_MPCORE 169 def_bool y 170 depends on CPU_V6 && SMP 171 select OPROFILE_ARM11_CORE 172 173config OPROFILE_ARM11_CORE 174 bool 175 176config OPROFILE_ARMV7 177 def_bool y 178 depends on CPU_V7 && !SMP 179 bool 180 181endif 182 183config VECTORS_BASE 184 hex 185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR 186 default DRAM_BASE if REMAP_VECTORS_TO_RAM 187 default 0x00000000 188 help 189 The base address of exception vectors. 190 191source "init/Kconfig" 192 193source "kernel/Kconfig.freezer" 194 195menu "System Type" 196 197choice 198 prompt "ARM system type" 199 default ARCH_VERSATILE 200 201config ARCH_AAEC2000 202 bool "Agilent AAEC-2000 based" 203 select CPU_ARM920T 204 select ARM_AMBA 205 select HAVE_CLK 206 help 207 This enables support for systems based on the Agilent AAEC-2000 208 209config ARCH_INTEGRATOR 210 bool "ARM Ltd. Integrator family" 211 select ARM_AMBA 212 select HAVE_CLK 213 select COMMON_CLKDEV 214 select ICST525 215 help 216 Support for ARM's Integrator platform. 217 218config ARCH_REALVIEW 219 bool "ARM Ltd. RealView family" 220 select ARM_AMBA 221 select HAVE_CLK 222 select COMMON_CLKDEV 223 select ICST307 224 select GENERIC_TIME 225 select GENERIC_CLOCKEVENTS 226 help 227 This enables support for ARM Ltd RealView boards. 228 229config ARCH_VERSATILE 230 bool "ARM Ltd. Versatile family" 231 select ARM_AMBA 232 select ARM_VIC 233 select HAVE_CLK 234 select COMMON_CLKDEV 235 select ICST307 236 select GENERIC_TIME 237 select GENERIC_CLOCKEVENTS 238 help 239 This enables support for ARM Ltd Versatile board. 240 241config ARCH_AT91 242 bool "Atmel AT91" 243 select GENERIC_GPIO 244 select HAVE_CLK 245 help 246 This enables support for systems based on the Atmel AT91RM9200, 247 AT91SAM9 and AT91CAP9 processors. 248 249config ARCH_CLPS711X 250 bool "Cirrus Logic CLPS711x/EP721x-based" 251 select CPU_ARM720T 252 help 253 Support for Cirrus Logic 711x/721x based boards. 254 255config ARCH_EBSA110 256 bool "EBSA-110" 257 select CPU_SA110 258 select ISA 259 select NO_IOPORT 260 help 261 This is an evaluation board for the StrongARM processor available 262 from Digital. It has limited hardware on-board, including an 263 Ethernet interface, two PCMCIA sockets, two serial ports and a 264 parallel port. 265 266config ARCH_EP93XX 267 bool "EP93xx-based" 268 select CPU_ARM920T 269 select ARM_AMBA 270 select ARM_VIC 271 select GENERIC_GPIO 272 select HAVE_CLK 273 select COMMON_CLKDEV 274 select ARCH_REQUIRE_GPIOLIB 275 help 276 This enables support for the Cirrus EP93xx series of CPUs. 277 278config ARCH_FOOTBRIDGE 279 bool "FootBridge" 280 select CPU_SA110 281 select FOOTBRIDGE 282 help 283 Support for systems based on the DC21285 companion chip 284 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 285 286config ARCH_NETX 287 bool "Hilscher NetX based" 288 select CPU_ARM926T 289 select ARM_VIC 290 select GENERIC_CLOCKEVENTS 291 select GENERIC_TIME 292 help 293 This enables support for systems based on the Hilscher NetX Soc 294 295config ARCH_H720X 296 bool "Hynix HMS720x-based" 297 select CPU_ARM720T 298 select ISA_DMA_API 299 help 300 This enables support for systems based on the Hynix HMS720x 301 302config ARCH_IMX 303 bool "IMX" 304 select CPU_ARM920T 305 select GENERIC_GPIO 306 select GENERIC_TIME 307 select GENERIC_CLOCKEVENTS 308 help 309 Support for Motorola's i.MX family of processors (MX1, MXL). 310 311config ARCH_IOP13XX 312 bool "IOP13xx-based" 313 depends on MMU 314 select CPU_XSC3 315 select PLAT_IOP 316 select PCI 317 select ARCH_SUPPORTS_MSI 318 select VMSPLIT_1G 319 help 320 Support for Intel's IOP13XX (XScale) family of processors. 321 322config ARCH_IOP32X 323 bool "IOP32x-based" 324 depends on MMU 325 select CPU_XSCALE 326 select PLAT_IOP 327 select PCI 328 select GENERIC_GPIO 329 select ARCH_REQUIRE_GPIOLIB 330 help 331 Support for Intel's 80219 and IOP32X (XScale) family of 332 processors. 333 334config ARCH_IOP33X 335 bool "IOP33x-based" 336 depends on MMU 337 select CPU_XSCALE 338 select PLAT_IOP 339 select PCI 340 select GENERIC_GPIO 341 select ARCH_REQUIRE_GPIOLIB 342 help 343 Support for Intel's IOP33X (XScale) family of processors. 344 345config ARCH_IXP23XX 346 bool "IXP23XX-based" 347 depends on MMU 348 select CPU_XSC3 349 select PCI 350 help 351 Support for Intel's IXP23xx (XScale) family of processors. 352 353config ARCH_IXP2000 354 bool "IXP2400/2800-based" 355 depends on MMU 356 select CPU_XSCALE 357 select PCI 358 help 359 Support for Intel's IXP2400/2800 (XScale) family of processors. 360 361config ARCH_IXP4XX 362 bool "IXP4xx-based" 363 depends on MMU 364 select CPU_XSCALE 365 select GENERIC_GPIO 366 select GENERIC_TIME 367 select GENERIC_CLOCKEVENTS 368 select DMABOUNCE if PCI 369 help 370 Support for Intel's IXP4XX (XScale) family of processors. 371 372config ARCH_L7200 373 bool "LinkUp-L7200" 374 select CPU_ARM720T 375 select FIQ 376 help 377 Say Y here if you intend to run this kernel on a LinkUp Systems 378 L7200 Software Development Board which uses an ARM720T processor. 379 Information on this board can be obtained at: 380 381 <http://www.linkupsys.com/> 382 383 If you have any questions or comments about the Linux kernel port 384 to this board, send e-mail to <sjhill@cotw.com>. 385 386config ARCH_KIRKWOOD 387 bool "Marvell Kirkwood" 388 select CPU_FEROCEON 389 select PCI 390 select GENERIC_GPIO 391 select GENERIC_TIME 392 select GENERIC_CLOCKEVENTS 393 select PLAT_ORION 394 help 395 Support for the following Marvell Kirkwood series SoCs: 396 88F6180, 88F6192 and 88F6281. 397 398config ARCH_KS8695 399 bool "Micrel/Kendin KS8695" 400 select CPU_ARM922T 401 select GENERIC_GPIO 402 select ARCH_REQUIRE_GPIOLIB 403 help 404 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 405 System-on-Chip devices. 406 407config ARCH_NS9XXX 408 bool "NetSilicon NS9xxx" 409 select CPU_ARM926T 410 select GENERIC_GPIO 411 select GENERIC_TIME 412 select GENERIC_CLOCKEVENTS 413 select HAVE_CLK 414 help 415 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx 416 System. 417 418 <http://www.digi.com/products/microprocessors/index.jsp> 419 420config ARCH_LOKI 421 bool "Marvell Loki (88RC8480)" 422 select CPU_FEROCEON 423 select GENERIC_TIME 424 select GENERIC_CLOCKEVENTS 425 select PLAT_ORION 426 help 427 Support for the Marvell Loki (88RC8480) SoC. 428 429config ARCH_MV78XX0 430 bool "Marvell MV78xx0" 431 select CPU_FEROCEON 432 select PCI 433 select GENERIC_GPIO 434 select GENERIC_TIME 435 select GENERIC_CLOCKEVENTS 436 select PLAT_ORION 437 help 438 Support for the following Marvell MV78xx0 series SoCs: 439 MV781x0, MV782x0. 440 441config ARCH_MXC 442 bool "Freescale MXC/iMX-based" 443 select GENERIC_TIME 444 select GENERIC_CLOCKEVENTS 445 select ARCH_MTD_XIP 446 select GENERIC_GPIO 447 select ARCH_REQUIRE_GPIOLIB 448 help 449 Support for Freescale MXC/iMX-based family of processors 450 451config ARCH_ORION5X 452 bool "Marvell Orion" 453 depends on MMU 454 select CPU_FEROCEON 455 select PCI 456 select GENERIC_GPIO 457 select GENERIC_TIME 458 select GENERIC_CLOCKEVENTS 459 select PLAT_ORION 460 help 461 Support for the following Marvell Orion 5x series SoCs: 462 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 463 Orion-2 (5281), Orion-1-90 (6183). 464 465config ARCH_PNX4008 466 bool "Philips Nexperia PNX4008 Mobile" 467 select CPU_ARM926T 468 select HAVE_CLK 469 help 470 This enables support for Philips PNX4008 mobile platform. 471 472config ARCH_PXA 473 bool "PXA2xx/PXA3xx-based" 474 depends on MMU 475 select ARCH_MTD_XIP 476 select GENERIC_GPIO 477 select HAVE_CLK 478 select COMMON_CLKDEV 479 select ARCH_REQUIRE_GPIOLIB 480 select GENERIC_TIME 481 select GENERIC_CLOCKEVENTS 482 select TICK_ONESHOT 483 help 484 Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 485 486config ARCH_RPC 487 bool "RiscPC" 488 select ARCH_ACORN 489 select FIQ 490 select TIMER_ACORN 491 select ARCH_MAY_HAVE_PC_FDC 492 select HAVE_PATA_PLATFORM 493 select ISA_DMA_API 494 select NO_IOPORT 495 select ARCH_SPARSEMEM_ENABLE 496 help 497 On the Acorn Risc-PC, Linux can support the internal IDE disk and 498 CD-ROM interface, serial and parallel port, and the floppy drive. 499 500config ARCH_SA1100 501 bool "SA1100-based" 502 select CPU_SA1100 503 select ISA 504 select ARCH_SPARSEMEM_ENABLE 505 select ARCH_MTD_XIP 506 select GENERIC_GPIO 507 select GENERIC_TIME 508 select GENERIC_CLOCKEVENTS 509 select HAVE_CLK 510 select TICK_ONESHOT 511 select ARCH_REQUIRE_GPIOLIB 512 help 513 Support for StrongARM 11x0 based boards. 514 515config ARCH_S3C2410 516 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" 517 select GENERIC_GPIO 518 select HAVE_CLK 519 help 520 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 521 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 522 the Samsung SMDK2410 development board (and derivatives). 523 524config ARCH_S3C64XX 525 bool "Samsung S3C64XX" 526 select GENERIC_GPIO 527 select HAVE_CLK 528 help 529 Samsung S3C64XX series based systems 530 531config ARCH_SHARK 532 bool "Shark" 533 select CPU_SA110 534 select ISA 535 select ISA_DMA 536 select ZONE_DMA 537 select PCI 538 help 539 Support for the StrongARM based Digital DNARD machine, also known 540 as "Shark" (<http://www.shark-linux.de/shark.html>). 541 542config ARCH_LH7A40X 543 bool "Sharp LH7A40X" 544 select CPU_ARM922T 545 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM 546 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM 547 help 548 Say Y here for systems based on one of the Sharp LH7A40X 549 System on a Chip processors. These CPUs include an ARM922T 550 core with a wide array of integrated devices for 551 hand-held and low-power applications. 552 553config ARCH_DAVINCI 554 bool "TI DaVinci" 555 select CPU_ARM926T 556 select GENERIC_TIME 557 select GENERIC_CLOCKEVENTS 558 select GENERIC_GPIO 559 select ARCH_REQUIRE_GPIOLIB 560 select HAVE_CLK 561 select ZONE_DMA 562 help 563 Support for TI's DaVinci platform. 564 565config ARCH_OMAP 566 bool "TI OMAP" 567 select GENERIC_GPIO 568 select HAVE_CLK 569 select ARCH_REQUIRE_GPIOLIB 570 select GENERIC_TIME 571 select GENERIC_CLOCKEVENTS 572 help 573 Support for TI's OMAP platform (OMAP1 and OMAP2). 574 575config ARCH_MSM 576 bool "Qualcomm MSM" 577 select CPU_V6 578 select GENERIC_TIME 579 select GENERIC_CLOCKEVENTS 580 help 581 Support for Qualcomm MSM7K based systems. This runs on the ARM11 582 apps processor of the MSM7K and depends on a shared memory 583 interface to the ARM9 modem processor which runs the baseband stack 584 and controls some vital subsystems (clock and power control, etc). 585 586config ARCH_W90X900 587 bool "Nuvoton W90X900 CPU" 588 select CPU_ARM926T 589 help 590 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You 591 can login www.mcuos.com or www.nuvoton.com to know more. 592 593endchoice 594 595source "arch/arm/mach-clps711x/Kconfig" 596 597source "arch/arm/mach-ep93xx/Kconfig" 598 599source "arch/arm/mach-footbridge/Kconfig" 600 601source "arch/arm/mach-integrator/Kconfig" 602 603source "arch/arm/mach-iop32x/Kconfig" 604 605source "arch/arm/mach-iop33x/Kconfig" 606 607source "arch/arm/mach-iop13xx/Kconfig" 608 609source "arch/arm/mach-ixp4xx/Kconfig" 610 611source "arch/arm/mach-ixp2000/Kconfig" 612 613source "arch/arm/mach-ixp23xx/Kconfig" 614 615source "arch/arm/mach-loki/Kconfig" 616 617source "arch/arm/mach-mv78xx0/Kconfig" 618 619source "arch/arm/mach-pxa/Kconfig" 620 621source "arch/arm/mach-sa1100/Kconfig" 622 623source "arch/arm/plat-omap/Kconfig" 624 625source "arch/arm/mach-omap1/Kconfig" 626 627source "arch/arm/mach-omap2/Kconfig" 628 629source "arch/arm/mach-orion5x/Kconfig" 630 631source "arch/arm/mach-kirkwood/Kconfig" 632 633source "arch/arm/plat-s3c24xx/Kconfig" 634source "arch/arm/plat-s3c64xx/Kconfig" 635source "arch/arm/plat-s3c/Kconfig" 636 637if ARCH_S3C2410 638source "arch/arm/mach-s3c2400/Kconfig" 639source "arch/arm/mach-s3c2410/Kconfig" 640source "arch/arm/mach-s3c2412/Kconfig" 641source "arch/arm/mach-s3c2440/Kconfig" 642source "arch/arm/mach-s3c2442/Kconfig" 643source "arch/arm/mach-s3c2443/Kconfig" 644endif 645 646if ARCH_S3C64XX 647source "arch/arm/mach-s3c6400/Kconfig" 648source "arch/arm/mach-s3c6410/Kconfig" 649endif 650 651source "arch/arm/mach-lh7a40x/Kconfig" 652 653source "arch/arm/mach-imx/Kconfig" 654 655source "arch/arm/mach-h720x/Kconfig" 656 657source "arch/arm/mach-versatile/Kconfig" 658 659source "arch/arm/mach-aaec2000/Kconfig" 660 661source "arch/arm/mach-realview/Kconfig" 662 663source "arch/arm/mach-at91/Kconfig" 664 665source "arch/arm/plat-mxc/Kconfig" 666 667source "arch/arm/mach-netx/Kconfig" 668 669source "arch/arm/mach-ns9xxx/Kconfig" 670 671source "arch/arm/mach-davinci/Kconfig" 672 673source "arch/arm/mach-ks8695/Kconfig" 674 675source "arch/arm/mach-msm/Kconfig" 676 677source "arch/arm/mach-w90x900/Kconfig" 678 679# Definitions to make life easier 680config ARCH_ACORN 681 bool 682 683config PLAT_IOP 684 bool 685 686config PLAT_ORION 687 bool 688 689source arch/arm/mm/Kconfig 690 691config IWMMXT 692 bool "Enable iWMMXt support" 693 depends on CPU_XSCALE || CPU_XSC3 694 default y if PXA27x || PXA3xx 695 help 696 Enable support for iWMMXt context switching at run time if 697 running on a CPU that supports it. 698 699# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 700config XSCALE_PMU 701 bool 702 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 703 default y 704 705if !MMU 706source "arch/arm/Kconfig-nommu" 707endif 708 709endmenu 710 711source "arch/arm/common/Kconfig" 712 713config FORCE_MAX_ZONEORDER 714 int 715 depends on SA1111 716 default "9" 717 718menu "Bus support" 719 720config ARM_AMBA 721 bool 722 723config ISA 724 bool 725 help 726 Find out whether you have ISA slots on your motherboard. ISA is the 727 name of a bus system, i.e. the way the CPU talks to the other stuff 728 inside your box. Other bus systems are PCI, EISA, MicroChannel 729 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 730 newer boards don't support it. If you have ISA, say Y, otherwise N. 731 732# Select ISA DMA controller support 733config ISA_DMA 734 bool 735 select ISA_DMA_API 736 737# Select ISA DMA interface 738config ISA_DMA_API 739 bool 740 741config PCI 742 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE 743 help 744 Find out whether you have a PCI motherboard. PCI is the name of a 745 bus system, i.e. the way the CPU talks to the other stuff inside 746 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 747 VESA. If you have PCI, say Y, otherwise N. 748 749config PCI_SYSCALL 750 def_bool PCI 751 752# Select the host bridge type 753config PCI_HOST_VIA82C505 754 bool 755 depends on PCI && ARCH_SHARK 756 default y 757 758config PCI_HOST_ITE8152 759 bool 760 depends on PCI && MACH_ARMCORE 761 default y 762 select DMABOUNCE 763 764source "drivers/pci/Kconfig" 765 766source "drivers/pcmcia/Kconfig" 767 768endmenu 769 770menu "Kernel Features" 771 772source "kernel/time/Kconfig" 773 774config SMP 775 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 776 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP) 777 select USE_GENERIC_SMP_HELPERS 778 help 779 This enables support for systems with more than one CPU. If you have 780 a system with only one CPU, like most personal computers, say N. If 781 you have a system with more than one CPU, say Y. 782 783 If you say N here, the kernel will run on single and multiprocessor 784 machines, but will use only one CPU of a multiprocessor machine. If 785 you say Y here, the kernel will run on many, but not all, single 786 processor machines. On a single processor machine, the kernel will 787 run faster if you say N here. 788 789 See also <file:Documentation/i386/IO-APIC.txt>, 790 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 791 <http://www.linuxdoc.org/docs.html#howto>. 792 793 If you don't know what to do here, say N. 794 795choice 796 prompt "Memory split" 797 default VMSPLIT_3G 798 help 799 Select the desired split between kernel and user memory. 800 801 If you are not absolutely sure what you are doing, leave this 802 option alone! 803 804 config VMSPLIT_3G 805 bool "3G/1G user/kernel split" 806 config VMSPLIT_2G 807 bool "2G/2G user/kernel split" 808 config VMSPLIT_1G 809 bool "1G/3G user/kernel split" 810endchoice 811 812config PAGE_OFFSET 813 hex 814 default 0x40000000 if VMSPLIT_1G 815 default 0x80000000 if VMSPLIT_2G 816 default 0xC0000000 817 818config NR_CPUS 819 int "Maximum number of CPUs (2-32)" 820 range 2 32 821 depends on SMP 822 default "4" 823 824config HOTPLUG_CPU 825 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 826 depends on SMP && HOTPLUG && EXPERIMENTAL 827 help 828 Say Y here to experiment with turning CPUs off and on. CPUs 829 can be controlled through /sys/devices/system/cpu. 830 831config LOCAL_TIMERS 832 bool "Use local timer interrupts" 833 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP) 834 default y 835 help 836 Enable support for local timers on SMP platforms, rather then the 837 legacy IPI broadcast method. Local timers allows the system 838 accounting to be spread across the timer interval, preventing a 839 "thundering herd" at every timer tick. 840 841config PREEMPT 842 bool "Preemptible Kernel (EXPERIMENTAL)" 843 depends on EXPERIMENTAL 844 help 845 This option reduces the latency of the kernel when reacting to 846 real-time or interactive events by allowing a low priority process to 847 be preempted even if it is in kernel mode executing a system call. 848 This allows applications to run more reliably even when the system is 849 under load. 850 851 Say Y here if you are building a kernel for a desktop, embedded 852 or real-time system. Say N if you are unsure. 853 854config HZ 855 int 856 default 128 if ARCH_L7200 857 default 200 if ARCH_EBSA110 || ARCH_S3C2410 858 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 859 default AT91_TIMER_HZ if ARCH_AT91 860 default 100 861 862config AEABI 863 bool "Use the ARM EABI to compile the kernel" 864 help 865 This option allows for the kernel to be compiled using the latest 866 ARM ABI (aka EABI). This is only useful if you are using a user 867 space environment that is also compiled with EABI. 868 869 Since there are major incompatibilities between the legacy ABI and 870 EABI, especially with regard to structure member alignment, this 871 option also changes the kernel syscall calling convention to 872 disambiguate both ABIs and allow for backward compatibility support 873 (selected with CONFIG_OABI_COMPAT). 874 875 To use this you need GCC version 4.0.0 or later. 876 877config OABI_COMPAT 878 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 879 depends on AEABI && EXPERIMENTAL 880 default y 881 help 882 This option preserves the old syscall interface along with the 883 new (ARM EABI) one. It also provides a compatibility layer to 884 intercept syscalls that have structure arguments which layout 885 in memory differs between the legacy ABI and the new ARM EABI 886 (only for non "thumb" binaries). This option adds a tiny 887 overhead to all syscalls and produces a slightly larger kernel. 888 If you know you'll be using only pure EABI user space then you 889 can say N here. If this option is not selected and you attempt 890 to execute a legacy ABI binary then the result will be 891 UNPREDICTABLE (in fact it can be predicted that it won't work 892 at all). If in doubt say Y. 893 894config ARCH_FLATMEM_HAS_HOLES 895 bool 896 default y 897 depends on FLATMEM 898 899# Discontigmem is deprecated 900config ARCH_DISCONTIGMEM_ENABLE 901 bool 902 903config ARCH_SPARSEMEM_ENABLE 904 bool 905 906config ARCH_SPARSEMEM_DEFAULT 907 def_bool ARCH_SPARSEMEM_ENABLE 908 909config ARCH_SELECT_MEMORY_MODEL 910 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE 911 912config NODES_SHIFT 913 int 914 default "4" if ARCH_LH7A40X 915 default "2" 916 depends on NEED_MULTIPLE_NODES 917 918source "mm/Kconfig" 919 920config LEDS 921 bool "Timer and CPU usage LEDs" 922 depends on ARCH_CDB89712 || ARCH_EBSA110 || \ 923 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 924 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 925 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 926 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 927 ARCH_AT91 || ARCH_DAVINCI || \ 928 ARCH_KS8695 || MACH_RD88F5182 929 help 930 If you say Y here, the LEDs on your machine will be used 931 to provide useful information about your current system status. 932 933 If you are compiling a kernel for a NetWinder or EBSA-285, you will 934 be able to select which LEDs are active using the options below. If 935 you are compiling a kernel for the EBSA-110 or the LART however, the 936 red LED will simply flash regularly to indicate that the system is 937 still functional. It is safe to say Y here if you have a CATS 938 system, but the driver will do nothing. 939 940config LEDS_TIMER 941 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 942 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 943 || MACH_OMAP_PERSEUS2 944 depends on LEDS 945 depends on !GENERIC_CLOCKEVENTS 946 default y if ARCH_EBSA110 947 help 948 If you say Y here, one of the system LEDs (the green one on the 949 NetWinder, the amber one on the EBSA285, or the red one on the LART) 950 will flash regularly to indicate that the system is still 951 operational. This is mainly useful to kernel hackers who are 952 debugging unstable kernels. 953 954 The LART uses the same LED for both Timer LED and CPU usage LED 955 functions. You may choose to use both, but the Timer LED function 956 will overrule the CPU usage LED. 957 958config LEDS_CPU 959 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 960 !ARCH_OMAP) \ 961 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 962 || MACH_OMAP_PERSEUS2 963 depends on LEDS 964 help 965 If you say Y here, the red LED will be used to give a good real 966 time indication of CPU usage, by lighting whenever the idle task 967 is not currently executing. 968 969 The LART uses the same LED for both Timer LED and CPU usage LED 970 functions. You may choose to use both, but the Timer LED function 971 will overrule the CPU usage LED. 972 973config ALIGNMENT_TRAP 974 bool 975 depends on CPU_CP15_MMU 976 default y if !ARCH_EBSA110 977 help 978 ARM processors cannot fetch/store information which is not 979 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 980 address divisible by 4. On 32-bit ARM processors, these non-aligned 981 fetch/store instructions will be emulated in software if you say 982 here, which has a severe performance impact. This is necessary for 983 correct operation of some network protocols. With an IP-only 984 configuration it is safe to say N, otherwise say Y. 985 986endmenu 987 988menu "Boot options" 989 990# Compressed boot loader in ROM. Yes, we really want to ask about 991# TEXT and BSS so we preserve their values in the config files. 992config ZBOOT_ROM_TEXT 993 hex "Compressed ROM boot loader base address" 994 default "0" 995 help 996 The physical address at which the ROM-able zImage is to be 997 placed in the target. Platforms which normally make use of 998 ROM-able zImage formats normally set this to a suitable 999 value in their defconfig file. 1000 1001 If ZBOOT_ROM is not enabled, this has no effect. 1002 1003config ZBOOT_ROM_BSS 1004 hex "Compressed ROM boot loader BSS address" 1005 default "0" 1006 help 1007 The base address of an area of read/write memory in the target 1008 for the ROM-able zImage which must be available while the 1009 decompressor is running. It must be large enough to hold the 1010 entire decompressed kernel plus an additional 128 KiB. 1011 Platforms which normally make use of ROM-able zImage formats 1012 normally set this to a suitable value in their defconfig file. 1013 1014 If ZBOOT_ROM is not enabled, this has no effect. 1015 1016config ZBOOT_ROM 1017 bool "Compressed boot loader in ROM/flash" 1018 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 1019 help 1020 Say Y here if you intend to execute your compressed kernel image 1021 (zImage) directly from ROM or flash. If unsure, say N. 1022 1023config CMDLINE 1024 string "Default kernel command string" 1025 default "" 1026 help 1027 On some architectures (EBSA110 and CATS), there is currently no way 1028 for the boot loader to pass arguments to the kernel. For these 1029 architectures, you should supply some command-line options at build 1030 time by entering them here. As a minimum, you should specify the 1031 memory size and the root device (e.g., mem=64M root=/dev/nfs). 1032 1033config XIP_KERNEL 1034 bool "Kernel Execute-In-Place from ROM" 1035 depends on !ZBOOT_ROM 1036 help 1037 Execute-In-Place allows the kernel to run from non-volatile storage 1038 directly addressable by the CPU, such as NOR flash. This saves RAM 1039 space since the text section of the kernel is not loaded from flash 1040 to RAM. Read-write sections, such as the data section and stack, 1041 are still copied to RAM. The XIP kernel is not compressed since 1042 it has to run directly from flash, so it will take more space to 1043 store it. The flash address used to link the kernel object files, 1044 and for storing it, is configuration dependent. Therefore, if you 1045 say Y here, you must know the proper physical address where to 1046 store the kernel image depending on your own flash memory usage. 1047 1048 Also note that the make target becomes "make xipImage" rather than 1049 "make zImage" or "make Image". The final kernel binary to put in 1050 ROM memory will be arch/arm/boot/xipImage. 1051 1052 If unsure, say N. 1053 1054config XIP_PHYS_ADDR 1055 hex "XIP Kernel Physical Location" 1056 depends on XIP_KERNEL 1057 default "0x00080000" 1058 help 1059 This is the physical address in your flash memory the kernel will 1060 be linked for and stored to. This address is dependent on your 1061 own flash usage. 1062 1063config KEXEC 1064 bool "Kexec system call (EXPERIMENTAL)" 1065 depends on EXPERIMENTAL 1066 help 1067 kexec is a system call that implements the ability to shutdown your 1068 current kernel, and to start another kernel. It is like a reboot 1069 but it is independent of the system firmware. And like a reboot 1070 you can start any kernel with it, not just Linux. 1071 1072 It is an ongoing process to be certain the hardware in a machine 1073 is properly shutdown, so do not be surprised if this code does not 1074 initially work for you. It may help to enable device hotplugging 1075 support. 1076 1077config ATAGS_PROC 1078 bool "Export atags in procfs" 1079 depends on KEXEC 1080 default y 1081 help 1082 Should the atags used to boot the kernel be exported in an "atags" 1083 file in procfs. Useful with kexec. 1084 1085endmenu 1086 1087menu "CPU Power Management" 1088 1089if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA) 1090 1091source "drivers/cpufreq/Kconfig" 1092 1093config CPU_FREQ_SA1100 1094 bool 1095 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 1096 default y 1097 1098config CPU_FREQ_SA1110 1099 bool 1100 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 1101 default y 1102 1103config CPU_FREQ_INTEGRATOR 1104 tristate "CPUfreq driver for ARM Integrator CPUs" 1105 depends on ARCH_INTEGRATOR && CPU_FREQ 1106 default y 1107 help 1108 This enables the CPUfreq driver for ARM Integrator CPUs. 1109 1110 For details, take a look at <file:Documentation/cpu-freq>. 1111 1112 If in doubt, say Y. 1113 1114config CPU_FREQ_IMX 1115 tristate "CPUfreq driver for i.MX CPUs" 1116 depends on ARCH_IMX && CPU_FREQ 1117 default n 1118 help 1119 This enables the CPUfreq driver for i.MX CPUs. 1120 1121 If in doubt, say N. 1122 1123config CPU_FREQ_PXA 1124 bool 1125 depends on CPU_FREQ && ARCH_PXA && PXA25x 1126 default y 1127 select CPU_FREQ_DEFAULT_GOV_USERSPACE 1128 1129endif 1130 1131source "drivers/cpuidle/Kconfig" 1132 1133endmenu 1134 1135menu "Floating point emulation" 1136 1137comment "At least one emulation must be selected" 1138 1139config FPE_NWFPE 1140 bool "NWFPE math emulation" 1141 depends on !AEABI || OABI_COMPAT 1142 ---help--- 1143 Say Y to include the NWFPE floating point emulator in the kernel. 1144 This is necessary to run most binaries. Linux does not currently 1145 support floating point hardware so you need to say Y here even if 1146 your machine has an FPA or floating point co-processor podule. 1147 1148 You may say N here if you are going to load the Acorn FPEmulator 1149 early in the bootup. 1150 1151config FPE_NWFPE_XP 1152 bool "Support extended precision" 1153 depends on FPE_NWFPE 1154 help 1155 Say Y to include 80-bit support in the kernel floating-point 1156 emulator. Otherwise, only 32 and 64-bit support is compiled in. 1157 Note that gcc does not generate 80-bit operations by default, 1158 so in most cases this option only enlarges the size of the 1159 floating point emulator without any good reason. 1160 1161 You almost surely want to say N here. 1162 1163config FPE_FASTFPE 1164 bool "FastFPE math emulation (EXPERIMENTAL)" 1165 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 1166 ---help--- 1167 Say Y here to include the FAST floating point emulator in the kernel. 1168 This is an experimental much faster emulator which now also has full 1169 precision for the mantissa. It does not support any exceptions. 1170 It is very simple, and approximately 3-6 times faster than NWFPE. 1171 1172 It should be sufficient for most programs. It may be not suitable 1173 for scientific calculations, but you have to check this for yourself. 1174 If you do not feel you need a faster FP emulation you should better 1175 choose NWFPE. 1176 1177config VFP 1178 bool "VFP-format floating point maths" 1179 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 1180 help 1181 Say Y to include VFP support code in the kernel. This is needed 1182 if your hardware includes a VFP unit. 1183 1184 Please see <file:Documentation/arm/VFP/release-notes.txt> for 1185 release notes and additional status information. 1186 1187 Say N if your target does not have VFP hardware. 1188 1189config VFPv3 1190 bool 1191 depends on VFP 1192 default y if CPU_V7 1193 1194config NEON 1195 bool "Advanced SIMD (NEON) Extension support" 1196 depends on VFPv3 && CPU_V7 1197 help 1198 Say Y to include support code for NEON, the ARMv7 Advanced SIMD 1199 Extension. 1200 1201endmenu 1202 1203menu "Userspace binary formats" 1204 1205source "fs/Kconfig.binfmt" 1206 1207config ARTHUR 1208 tristate "RISC OS personality" 1209 depends on !AEABI 1210 help 1211 Say Y here to include the kernel code necessary if you want to run 1212 Acorn RISC OS/Arthur binaries under Linux. This code is still very 1213 experimental; if this sounds frightening, say N and sleep in peace. 1214 You can also say M here to compile this support as a module (which 1215 will be called arthur). 1216 1217endmenu 1218 1219menu "Power management options" 1220 1221source "kernel/power/Kconfig" 1222 1223config ARCH_SUSPEND_POSSIBLE 1224 def_bool y 1225 1226endmenu 1227 1228source "net/Kconfig" 1229 1230menu "Device Drivers" 1231 1232source "drivers/base/Kconfig" 1233 1234source "drivers/connector/Kconfig" 1235 1236if ALIGNMENT_TRAP || !CPU_CP15_MMU 1237source "drivers/mtd/Kconfig" 1238endif 1239 1240source "drivers/parport/Kconfig" 1241 1242source "drivers/pnp/Kconfig" 1243 1244source "drivers/block/Kconfig" 1245 1246# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4 1247 1248source "drivers/misc/Kconfig" 1249 1250source "drivers/ide/Kconfig" 1251 1252source "drivers/scsi/Kconfig" 1253 1254source "drivers/ata/Kconfig" 1255 1256source "drivers/md/Kconfig" 1257 1258source "drivers/message/fusion/Kconfig" 1259 1260source "drivers/ieee1394/Kconfig" 1261 1262source "drivers/message/i2o/Kconfig" 1263 1264source "drivers/net/Kconfig" 1265 1266source "drivers/isdn/Kconfig" 1267 1268# input before char - char/joystick depends on it. As does USB. 1269 1270source "drivers/input/Kconfig" 1271 1272source "drivers/char/Kconfig" 1273 1274source "drivers/i2c/Kconfig" 1275 1276source "drivers/spi/Kconfig" 1277 1278source "drivers/gpio/Kconfig" 1279 1280source "drivers/w1/Kconfig" 1281 1282source "drivers/power/Kconfig" 1283 1284source "drivers/hwmon/Kconfig" 1285 1286source "drivers/thermal/Kconfig" 1287 1288source "drivers/watchdog/Kconfig" 1289 1290source "drivers/ssb/Kconfig" 1291 1292#source "drivers/l3/Kconfig" 1293 1294source "drivers/mfd/Kconfig" 1295 1296source "drivers/media/Kconfig" 1297 1298source "drivers/video/Kconfig" 1299 1300source "sound/Kconfig" 1301 1302source "drivers/hid/Kconfig" 1303 1304source "drivers/usb/Kconfig" 1305 1306source "drivers/uwb/Kconfig" 1307 1308source "drivers/mmc/Kconfig" 1309 1310source "drivers/memstick/Kconfig" 1311 1312source "drivers/accessibility/Kconfig" 1313 1314source "drivers/leds/Kconfig" 1315 1316source "drivers/rtc/Kconfig" 1317 1318source "drivers/dma/Kconfig" 1319 1320source "drivers/dca/Kconfig" 1321 1322source "drivers/auxdisplay/Kconfig" 1323 1324source "drivers/regulator/Kconfig" 1325 1326source "drivers/uio/Kconfig" 1327 1328source "drivers/staging/Kconfig" 1329 1330endmenu 1331 1332source "fs/Kconfig" 1333 1334source "arch/arm/Kconfig.debug" 1335 1336source "security/Kconfig" 1337 1338source "crypto/Kconfig" 1339 1340source "lib/Kconfig" 1341