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 RTC_LIB 12 help 13 The ARM series is a line of low-power-consumption RISC chip designs 14 licensed by ARM Ltd and targeted at embedded applications and 15 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 16 manufactured, but legacy ARM-based PC hardware remains popular in 17 Europe. There is an ARM Linux project with a web page at 18 <http://www.arm.linux.org.uk/>. 19 20config GENERIC_TIME 21 bool 22 default n 23 24config MMU 25 bool 26 default y 27 28config EISA 29 bool 30 ---help--- 31 The Extended Industry Standard Architecture (EISA) bus was 32 developed as an open alternative to the IBM MicroChannel bus. 33 34 The EISA bus provided some of the features of the IBM MicroChannel 35 bus while maintaining backward compatibility with cards made for 36 the older ISA bus. The EISA bus saw limited use between 1988 and 37 1995 when it was made obsolete by the PCI bus. 38 39 Say Y here if you are building a kernel for an EISA-based machine. 40 41 Otherwise, say N. 42 43config SBUS 44 bool 45 46config MCA 47 bool 48 help 49 MicroChannel Architecture is found in some IBM PS/2 machines and 50 laptops. It is a bus system similar to PCI or ISA. See 51 <file:Documentation/mca.txt> (and especially the web page given 52 there) before attempting to build an MCA bus kernel. 53 54config GENERIC_HARDIRQS 55 bool 56 default y 57 58config TRACE_IRQFLAGS_SUPPORT 59 bool 60 default y 61 62config HARDIRQS_SW_RESEND 63 bool 64 default y 65 66config GENERIC_IRQ_PROBE 67 bool 68 default y 69 70config RWSEM_GENERIC_SPINLOCK 71 bool 72 default y 73 74config RWSEM_XCHGADD_ALGORITHM 75 bool 76 77config ARCH_HAS_ILOG2_U32 78 bool 79 default n 80 81config ARCH_HAS_ILOG2_U64 82 bool 83 default n 84 85config GENERIC_HWEIGHT 86 bool 87 default y 88 89config GENERIC_CALIBRATE_DELAY 90 bool 91 default y 92 93config GENERIC_BUST_SPINLOCK 94 bool 95 96config ARCH_MAY_HAVE_PC_FDC 97 bool 98 99config GENERIC_ISA_DMA 100 bool 101 102config FIQ 103 bool 104 105config ARCH_MTD_XIP 106 bool 107 108config VECTORS_BASE 109 hex 110 default 0xffff0000 if MMU || CPU_HIGH_VECTOR 111 default DRAM_BASE if REMAP_VECTORS_TO_RAM 112 default 0x00000000 113 help 114 The base address of exception vectors. 115 116source "init/Kconfig" 117 118menu "System Type" 119 120choice 121 prompt "ARM system type" 122 default ARCH_VERSATILE 123 124config ARCH_AAEC2000 125 bool "Agilent AAEC-2000 based" 126 select ARM_AMBA 127 help 128 This enables support for systems based on the Agilent AAEC-2000 129 130config ARCH_INTEGRATOR 131 bool "ARM Ltd. Integrator family" 132 select ARM_AMBA 133 select ICST525 134 help 135 Support for ARM's Integrator platform. 136 137config ARCH_REALVIEW 138 bool "ARM Ltd. RealView family" 139 select ARM_AMBA 140 select ICST307 141 help 142 This enables support for ARM Ltd RealView boards. 143 144config ARCH_VERSATILE 145 bool "ARM Ltd. Versatile family" 146 select ARM_AMBA 147 select ARM_VIC 148 select ICST307 149 help 150 This enables support for ARM Ltd Versatile board. 151 152config ARCH_AT91 153 bool "Atmel AT91" 154 help 155 This enables support for systems based on the Atmel AT91RM9200 156 and AT91SAM9xxx processors. 157 158config ARCH_CLPS7500 159 bool "Cirrus CL-PS7500FE" 160 select TIMER_ACORN 161 select ISA 162 help 163 Support for the Cirrus Logic PS7500FE system-on-a-chip. 164 165config ARCH_CLPS711X 166 bool "Cirrus Logic CLPS711x/EP721x-based" 167 help 168 Support for Cirrus Logic 711x/721x based boards. 169 170config ARCH_CO285 171 bool "Co-EBSA285" 172 select FOOTBRIDGE 173 select FOOTBRIDGE_ADDIN 174 help 175 Support for Intel's EBSA285 companion chip. 176 177config ARCH_EBSA110 178 bool "EBSA-110" 179 select ISA 180 help 181 This is an evaluation board for the StrongARM processor available 182 from Digital. It has limited hardware on-board, including an 183 Ethernet interface, two PCMCIA sockets, two serial ports and a 184 parallel port. 185 186config ARCH_EP93XX 187 bool "EP93xx-based" 188 select ARM_AMBA 189 select ARM_VIC 190 help 191 This enables support for the Cirrus EP93xx series of CPUs. 192 193config ARCH_FOOTBRIDGE 194 bool "FootBridge" 195 select FOOTBRIDGE 196 help 197 Support for systems based on the DC21285 companion chip 198 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 199 200config ARCH_NETX 201 bool "Hilscher NetX based" 202 select ARM_VIC 203 help 204 This enables support for systems based on the Hilscher NetX Soc 205 206config ARCH_H720X 207 bool "Hynix HMS720x-based" 208 select ISA_DMA_API 209 help 210 This enables support for systems based on the Hynix HMS720x 211 212config ARCH_IMX 213 bool "IMX" 214 help 215 Support for Motorola's i.MX family of processors (MX1, MXL). 216 217config ARCH_IOP32X 218 bool "IOP32x-based" 219 depends on MMU 220 select PLAT_IOP 221 select PCI 222 help 223 Support for Intel's 80219 and IOP32X (XScale) family of 224 processors. 225 226config ARCH_IOP33X 227 bool "IOP33x-based" 228 depends on MMU 229 select PLAT_IOP 230 select PCI 231 help 232 Support for Intel's IOP33X (XScale) family of processors. 233 234config ARCH_IOP13XX 235 bool "IOP13xx-based" 236 select PCI 237 help 238 Support for Intel's IOP13XX (XScale) family of processors. 239 240config ARCH_IXP4XX 241 bool "IXP4xx-based" 242 depends on MMU 243 select GENERIC_TIME 244 help 245 Support for Intel's IXP4XX (XScale) family of processors. 246 247config ARCH_IXP2000 248 bool "IXP2400/2800-based" 249 depends on MMU 250 select PCI 251 help 252 Support for Intel's IXP2400/2800 (XScale) family of processors. 253 254config ARCH_IXP23XX 255 bool "IXP23XX-based" 256 depends on MMU 257 select PCI 258 help 259 Support for Intel's IXP23xx (XScale) family of processors. 260 261config ARCH_L7200 262 bool "LinkUp-L7200" 263 select FIQ 264 help 265 Say Y here if you intend to run this kernel on a LinkUp Systems 266 L7200 Software Development Board which uses an ARM720T processor. 267 Information on this board can be obtained at: 268 269 <http://www.linkupsys.com/> 270 271 If you have any questions or comments about the Linux kernel port 272 to this board, send e-mail to <sjhill@cotw.com>. 273 274config ARCH_PNX4008 275 bool "Philips Nexperia PNX4008 Mobile" 276 help 277 This enables support for Philips PNX4008 mobile platform. 278 279config ARCH_PXA 280 bool "PXA2xx-based" 281 depends on MMU 282 select ARCH_MTD_XIP 283 help 284 Support for Intel's PXA2XX processor line. 285 286config ARCH_RPC 287 bool "RiscPC" 288 select ARCH_ACORN 289 select FIQ 290 select TIMER_ACORN 291 select ARCH_MAY_HAVE_PC_FDC 292 select ISA_DMA_API 293 help 294 On the Acorn Risc-PC, Linux can support the internal IDE disk and 295 CD-ROM interface, serial and parallel port, and the floppy drive. 296 297config ARCH_SA1100 298 bool "SA1100-based" 299 select ISA 300 select ARCH_DISCONTIGMEM_ENABLE 301 select ARCH_MTD_XIP 302 help 303 Support for StrongARM 11x0 based boards. 304 305config ARCH_S3C2410 306 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" 307 help 308 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 309 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 310 the Samsung SMDK2410 development board (and derivatives). 311 312config ARCH_SHARK 313 bool "Shark" 314 select ISA 315 select ISA_DMA 316 select PCI 317 help 318 Support for the StrongARM based Digital DNARD machine, also known 319 as "Shark" (<http://www.shark-linux.de/shark.html>). 320 321config ARCH_LH7A40X 322 bool "Sharp LH7A40X" 323 help 324 Say Y here for systems based on one of the Sharp LH7A40X 325 System on a Chip processors. These CPUs include an ARM922T 326 core with a wide array of integrated devices for 327 hand-held and low-power applications. 328 329config ARCH_OMAP 330 bool "TI OMAP" 331 help 332 Support for TI's OMAP platform (OMAP1 and OMAP2). 333 334endchoice 335 336source "arch/arm/mach-clps711x/Kconfig" 337 338source "arch/arm/mach-ep93xx/Kconfig" 339 340source "arch/arm/mach-footbridge/Kconfig" 341 342source "arch/arm/mach-integrator/Kconfig" 343 344source "arch/arm/mach-iop32x/Kconfig" 345 346source "arch/arm/mach-iop33x/Kconfig" 347 348source "arch/arm/mach-iop13xx/Kconfig" 349 350source "arch/arm/mach-ixp4xx/Kconfig" 351 352source "arch/arm/mach-ixp2000/Kconfig" 353 354source "arch/arm/mach-ixp23xx/Kconfig" 355 356source "arch/arm/mach-pxa/Kconfig" 357 358source "arch/arm/mach-sa1100/Kconfig" 359 360source "arch/arm/plat-omap/Kconfig" 361 362source "arch/arm/mach-omap1/Kconfig" 363 364source "arch/arm/mach-omap2/Kconfig" 365 366source "arch/arm/plat-s3c24xx/Kconfig" 367 368if ARCH_S3C2410 369source "arch/arm/mach-s3c2400/Kconfig" 370source "arch/arm/mach-s3c2410/Kconfig" 371source "arch/arm/mach-s3c2412/Kconfig" 372source "arch/arm/mach-s3c2440/Kconfig" 373source "arch/arm/mach-s3c2442/Kconfig" 374source "arch/arm/mach-s3c2443/Kconfig" 375endif 376 377source "arch/arm/mach-lh7a40x/Kconfig" 378 379source "arch/arm/mach-imx/Kconfig" 380 381source "arch/arm/mach-h720x/Kconfig" 382 383source "arch/arm/mach-versatile/Kconfig" 384 385source "arch/arm/mach-aaec2000/Kconfig" 386 387source "arch/arm/mach-realview/Kconfig" 388 389source "arch/arm/mach-at91rm9200/Kconfig" 390 391source "arch/arm/mach-netx/Kconfig" 392 393# Definitions to make life easier 394config ARCH_ACORN 395 bool 396 397config PLAT_IOP 398 bool 399 400source arch/arm/mm/Kconfig 401 402config IWMMXT 403 bool "Enable iWMMXt support" 404 depends CPU_XSCALE || CPU_XSC3 405 default y if PXA27x 406 help 407 Enable support for iWMMXt context switching at run time if 408 running on a CPU that supports it. 409 410# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 411config XSCALE_PMU 412 bool 413 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 414 default y 415 416if !MMU 417source "arch/arm/Kconfig-nommu" 418endif 419 420endmenu 421 422source "arch/arm/common/Kconfig" 423 424config FORCE_MAX_ZONEORDER 425 int 426 depends on SA1111 427 default "9" 428 429menu "Bus support" 430 431config ARM_AMBA 432 bool 433 434config ISA 435 bool 436 help 437 Find out whether you have ISA slots on your motherboard. ISA is the 438 name of a bus system, i.e. the way the CPU talks to the other stuff 439 inside your box. Other bus systems are PCI, EISA, MicroChannel 440 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 441 newer boards don't support it. If you have ISA, say Y, otherwise N. 442 443# Select ISA DMA controller support 444config ISA_DMA 445 bool 446 select ISA_DMA_API 447 448# Select ISA DMA interface 449config ISA_DMA_API 450 bool 451 452config PCI 453 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX 454 help 455 Find out whether you have a PCI motherboard. PCI is the name of a 456 bus system, i.e. the way the CPU talks to the other stuff inside 457 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 458 VESA. If you have PCI, say Y, otherwise N. 459 460 The PCI-HOWTO, available from 461 <http://www.tldp.org/docs.html#howto>, contains valuable 462 information about which PCI hardware does work under Linux and which 463 doesn't. 464 465# Select the host bridge type 466config PCI_HOST_VIA82C505 467 bool 468 depends on PCI && ARCH_SHARK 469 default y 470 471source "drivers/pci/Kconfig" 472 473source "drivers/pcmcia/Kconfig" 474 475endmenu 476 477menu "Kernel Features" 478 479config SMP 480 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 481 depends on EXPERIMENTAL && REALVIEW_MPCORE 482 help 483 This enables support for systems with more than one CPU. If you have 484 a system with only one CPU, like most personal computers, say N. If 485 you have a system with more than one CPU, say Y. 486 487 If you say N here, the kernel will run on single and multiprocessor 488 machines, but will use only one CPU of a multiprocessor machine. If 489 you say Y here, the kernel will run on many, but not all, single 490 processor machines. On a single processor machine, the kernel will 491 run faster if you say N here. 492 493 See also the <file:Documentation/smp.txt>, 494 <file:Documentation/i386/IO-APIC.txt>, 495 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 496 <http://www.linuxdoc.org/docs.html#howto>. 497 498 If you don't know what to do here, say N. 499 500config NR_CPUS 501 int "Maximum number of CPUs (2-32)" 502 range 2 32 503 depends on SMP 504 default "4" 505 506config HOTPLUG_CPU 507 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 508 depends on SMP && HOTPLUG && EXPERIMENTAL 509 help 510 Say Y here to experiment with turning CPUs off and on. CPUs 511 can be controlled through /sys/devices/system/cpu. 512 513config LOCAL_TIMERS 514 bool "Use local timer interrupts" 515 depends on SMP && REALVIEW_MPCORE 516 default y 517 help 518 Enable support for local timers on SMP platforms, rather then the 519 legacy IPI broadcast method. Local timers allows the system 520 accounting to be spread across the timer interval, preventing a 521 "thundering herd" at every timer tick. 522 523config PREEMPT 524 bool "Preemptible Kernel (EXPERIMENTAL)" 525 depends on EXPERIMENTAL 526 help 527 This option reduces the latency of the kernel when reacting to 528 real-time or interactive events by allowing a low priority process to 529 be preempted even if it is in kernel mode executing a system call. 530 This allows applications to run more reliably even when the system is 531 under load. 532 533 Say Y here if you are building a kernel for a desktop, embedded 534 or real-time system. Say N if you are unsure. 535 536config NO_IDLE_HZ 537 bool "Dynamic tick timer" 538 help 539 Select this option if you want to disable continuous timer ticks 540 and have them programmed to occur as required. This option saves 541 power as the system can remain in idle state for longer. 542 543 By default dynamic tick is disabled during the boot, and can be 544 manually enabled with: 545 546 echo 1 > /sys/devices/system/timer/timer0/dyn_tick 547 548 Alternatively, if you want dynamic tick automatically enabled 549 during boot, pass "dyntick=enable" via the kernel command string. 550 551 Please note that dynamic tick may affect the accuracy of 552 timekeeping on some platforms depending on the implementation. 553 Currently at least OMAP, PXA2xx and SA11x0 platforms are known 554 to have accurate timekeeping with dynamic tick. 555 556config HZ 557 int 558 default 128 if ARCH_L7200 559 default 200 if ARCH_EBSA110 || ARCH_S3C2410 560 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 561 default 100 562 563config AEABI 564 bool "Use the ARM EABI to compile the kernel" 565 help 566 This option allows for the kernel to be compiled using the latest 567 ARM ABI (aka EABI). This is only useful if you are using a user 568 space environment that is also compiled with EABI. 569 570 Since there are major incompatibilities between the legacy ABI and 571 EABI, especially with regard to structure member alignment, this 572 option also changes the kernel syscall calling convention to 573 disambiguate both ABIs and allow for backward compatibility support 574 (selected with CONFIG_OABI_COMPAT). 575 576 To use this you need GCC version 4.0.0 or later. 577 578config OABI_COMPAT 579 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 580 depends on AEABI && EXPERIMENTAL 581 default y 582 help 583 This option preserves the old syscall interface along with the 584 new (ARM EABI) one. It also provides a compatibility layer to 585 intercept syscalls that have structure arguments which layout 586 in memory differs between the legacy ABI and the new ARM EABI 587 (only for non "thumb" binaries). This option adds a tiny 588 overhead to all syscalls and produces a slightly larger kernel. 589 If you know you'll be using only pure EABI user space then you 590 can say N here. If this option is not selected and you attempt 591 to execute a legacy ABI binary then the result will be 592 UNPREDICTABLE (in fact it can be predicted that it won't work 593 at all). If in doubt say Y. 594 595config ARCH_DISCONTIGMEM_ENABLE 596 bool 597 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) 598 help 599 Say Y to support efficient handling of discontiguous physical memory, 600 for architectures which are either NUMA (Non-Uniform Memory Access) 601 or have huge holes in the physical address space for other reasons. 602 See <file:Documentation/vm/numa> for more. 603 604config NODES_SHIFT 605 int 606 default "4" if ARCH_LH7A40X 607 default "2" 608 depends on NEED_MULTIPLE_NODES 609 610source "mm/Kconfig" 611 612config LEDS 613 bool "Timer and CPU usage LEDs" 614 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ 615 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 616 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 617 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 618 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 619 ARCH_AT91 || MACH_TRIZEPS4 620 help 621 If you say Y here, the LEDs on your machine will be used 622 to provide useful information about your current system status. 623 624 If you are compiling a kernel for a NetWinder or EBSA-285, you will 625 be able to select which LEDs are active using the options below. If 626 you are compiling a kernel for the EBSA-110 or the LART however, the 627 red LED will simply flash regularly to indicate that the system is 628 still functional. It is safe to say Y here if you have a CATS 629 system, but the driver will do nothing. 630 631config LEDS_TIMER 632 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 633 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 634 depends on LEDS 635 default y if ARCH_EBSA110 636 help 637 If you say Y here, one of the system LEDs (the green one on the 638 NetWinder, the amber one on the EBSA285, or the red one on the LART) 639 will flash regularly to indicate that the system is still 640 operational. This is mainly useful to kernel hackers who are 641 debugging unstable kernels. 642 643 The LART uses the same LED for both Timer LED and CPU usage LED 644 functions. You may choose to use both, but the Timer LED function 645 will overrule the CPU usage LED. 646 647config LEDS_CPU 648 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 649 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 650 depends on LEDS 651 help 652 If you say Y here, the red LED will be used to give a good real 653 time indication of CPU usage, by lighting whenever the idle task 654 is not currently executing. 655 656 The LART uses the same LED for both Timer LED and CPU usage LED 657 functions. You may choose to use both, but the Timer LED function 658 will overrule the CPU usage LED. 659 660config ALIGNMENT_TRAP 661 bool 662 depends on CPU_CP15_MMU 663 default y if !ARCH_EBSA110 664 help 665 ARM processors cannot fetch/store information which is not 666 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 667 address divisible by 4. On 32-bit ARM processors, these non-aligned 668 fetch/store instructions will be emulated in software if you say 669 here, which has a severe performance impact. This is necessary for 670 correct operation of some network protocols. With an IP-only 671 configuration it is safe to say N, otherwise say Y. 672 673endmenu 674 675menu "Boot options" 676 677# Compressed boot loader in ROM. Yes, we really want to ask about 678# TEXT and BSS so we preserve their values in the config files. 679config ZBOOT_ROM_TEXT 680 hex "Compressed ROM boot loader base address" 681 default "0" 682 help 683 The physical address at which the ROM-able zImage is to be 684 placed in the target. Platforms which normally make use of 685 ROM-able zImage formats normally set this to a suitable 686 value in their defconfig file. 687 688 If ZBOOT_ROM is not enabled, this has no effect. 689 690config ZBOOT_ROM_BSS 691 hex "Compressed ROM boot loader BSS address" 692 default "0" 693 help 694 The base address of an area of read/write memory in the target 695 for the ROM-able zImage which must be available while the 696 decompressor is running. It must be large enough to hold the 697 entire decompressed kernel plus an additional 128 KiB. 698 Platforms which normally make use of ROM-able zImage formats 699 normally set this to a suitable value in their defconfig file. 700 701 If ZBOOT_ROM is not enabled, this has no effect. 702 703config ZBOOT_ROM 704 bool "Compressed boot loader in ROM/flash" 705 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 706 help 707 Say Y here if you intend to execute your compressed kernel image 708 (zImage) directly from ROM or flash. If unsure, say N. 709 710config CMDLINE 711 string "Default kernel command string" 712 default "" 713 help 714 On some architectures (EBSA110 and CATS), there is currently no way 715 for the boot loader to pass arguments to the kernel. For these 716 architectures, you should supply some command-line options at build 717 time by entering them here. As a minimum, you should specify the 718 memory size and the root device (e.g., mem=64M root=/dev/nfs). 719 720config XIP_KERNEL 721 bool "Kernel Execute-In-Place from ROM" 722 depends on !ZBOOT_ROM 723 help 724 Execute-In-Place allows the kernel to run from non-volatile storage 725 directly addressable by the CPU, such as NOR flash. This saves RAM 726 space since the text section of the kernel is not loaded from flash 727 to RAM. Read-write sections, such as the data section and stack, 728 are still copied to RAM. The XIP kernel is not compressed since 729 it has to run directly from flash, so it will take more space to 730 store it. The flash address used to link the kernel object files, 731 and for storing it, is configuration dependent. Therefore, if you 732 say Y here, you must know the proper physical address where to 733 store the kernel image depending on your own flash memory usage. 734 735 Also note that the make target becomes "make xipImage" rather than 736 "make zImage" or "make Image". The final kernel binary to put in 737 ROM memory will be arch/arm/boot/xipImage. 738 739 If unsure, say N. 740 741config XIP_PHYS_ADDR 742 hex "XIP Kernel Physical Location" 743 depends on XIP_KERNEL 744 default "0x00080000" 745 help 746 This is the physical address in your flash memory the kernel will 747 be linked for and stored to. This address is dependent on your 748 own flash usage. 749 750endmenu 751 752if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX ) 753 754menu "CPU Frequency scaling" 755 756source "drivers/cpufreq/Kconfig" 757 758config CPU_FREQ_SA1100 759 bool 760 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 761 default y 762 763config CPU_FREQ_SA1110 764 bool 765 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 766 default y 767 768config CPU_FREQ_INTEGRATOR 769 tristate "CPUfreq driver for ARM Integrator CPUs" 770 depends on ARCH_INTEGRATOR && CPU_FREQ 771 default y 772 help 773 This enables the CPUfreq driver for ARM Integrator CPUs. 774 775 For details, take a look at <file:Documentation/cpu-freq>. 776 777 If in doubt, say Y. 778 779config CPU_FREQ_IMX 780 tristate "CPUfreq driver for i.MX CPUs" 781 depends on ARCH_IMX && CPU_FREQ 782 default n 783 help 784 This enables the CPUfreq driver for i.MX CPUs. 785 786 If in doubt, say N. 787 788endmenu 789 790endif 791 792menu "Floating point emulation" 793 794comment "At least one emulation must be selected" 795 796config FPE_NWFPE 797 bool "NWFPE math emulation" 798 depends on !AEABI || OABI_COMPAT 799 ---help--- 800 Say Y to include the NWFPE floating point emulator in the kernel. 801 This is necessary to run most binaries. Linux does not currently 802 support floating point hardware so you need to say Y here even if 803 your machine has an FPA or floating point co-processor podule. 804 805 You may say N here if you are going to load the Acorn FPEmulator 806 early in the bootup. 807 808config FPE_NWFPE_XP 809 bool "Support extended precision" 810 depends on FPE_NWFPE 811 help 812 Say Y to include 80-bit support in the kernel floating-point 813 emulator. Otherwise, only 32 and 64-bit support is compiled in. 814 Note that gcc does not generate 80-bit operations by default, 815 so in most cases this option only enlarges the size of the 816 floating point emulator without any good reason. 817 818 You almost surely want to say N here. 819 820config FPE_FASTFPE 821 bool "FastFPE math emulation (EXPERIMENTAL)" 822 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 823 ---help--- 824 Say Y here to include the FAST floating point emulator in the kernel. 825 This is an experimental much faster emulator which now also has full 826 precision for the mantissa. It does not support any exceptions. 827 It is very simple, and approximately 3-6 times faster than NWFPE. 828 829 It should be sufficient for most programs. It may be not suitable 830 for scientific calculations, but you have to check this for yourself. 831 If you do not feel you need a faster FP emulation you should better 832 choose NWFPE. 833 834config VFP 835 bool "VFP-format floating point maths" 836 depends on CPU_V6 || CPU_ARM926T 837 help 838 Say Y to include VFP support code in the kernel. This is needed 839 if your hardware includes a VFP unit. 840 841 Please see <file:Documentation/arm/VFP/release-notes.txt> for 842 release notes and additional status information. 843 844 Say N if your target does not have VFP hardware. 845 846endmenu 847 848menu "Userspace binary formats" 849 850source "fs/Kconfig.binfmt" 851 852config ARTHUR 853 tristate "RISC OS personality" 854 depends on !AEABI 855 help 856 Say Y here to include the kernel code necessary if you want to run 857 Acorn RISC OS/Arthur binaries under Linux. This code is still very 858 experimental; if this sounds frightening, say N and sleep in peace. 859 You can also say M here to compile this support as a module (which 860 will be called arthur). 861 862endmenu 863 864menu "Power management options" 865 866source "kernel/power/Kconfig" 867 868config APM 869 tristate "Advanced Power Management Emulation" 870 ---help--- 871 APM is a BIOS specification for saving power using several different 872 techniques. This is mostly useful for battery powered laptops with 873 APM compliant BIOSes. If you say Y here, the system time will be 874 reset after a RESUME operation, the /proc/apm device will provide 875 battery status information, and user-space programs will receive 876 notification of APM "events" (e.g. battery status change). 877 878 In order to use APM, you will need supporting software. For location 879 and more information, read <file:Documentation/pm.txt> and the 880 Battery Powered Linux mini-HOWTO, available from 881 <http://www.tldp.org/docs.html#howto>. 882 883 This driver does not spin down disk drives (see the hdparm(8) 884 manpage ("man 8 hdparm") for that), and it doesn't turn off 885 VESA-compliant "green" monitors. 886 887 Generally, if you don't have a battery in your machine, there isn't 888 much point in using this driver and you should say N. If you get 889 random kernel OOPSes or reboots that don't seem to be related to 890 anything, try disabling/enabling this option (or disabling/enabling 891 APM in your BIOS). 892 893endmenu 894 895source "net/Kconfig" 896 897menu "Device Drivers" 898 899source "drivers/base/Kconfig" 900 901source "drivers/connector/Kconfig" 902 903if ALIGNMENT_TRAP || !CPU_CP15_MMU 904source "drivers/mtd/Kconfig" 905endif 906 907source "drivers/parport/Kconfig" 908 909source "drivers/pnp/Kconfig" 910 911source "drivers/block/Kconfig" 912 913source "drivers/acorn/block/Kconfig" 914 915if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \ 916 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ 917 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \ 918 || ARCH_IXP23XX 919source "drivers/ide/Kconfig" 920endif 921 922source "drivers/scsi/Kconfig" 923 924source "drivers/ata/Kconfig" 925 926source "drivers/md/Kconfig" 927 928source "drivers/message/fusion/Kconfig" 929 930source "drivers/ieee1394/Kconfig" 931 932source "drivers/message/i2o/Kconfig" 933 934source "drivers/net/Kconfig" 935 936source "drivers/isdn/Kconfig" 937 938# input before char - char/joystick depends on it. As does USB. 939 940source "drivers/input/Kconfig" 941 942source "drivers/char/Kconfig" 943 944source "drivers/i2c/Kconfig" 945 946source "drivers/spi/Kconfig" 947 948source "drivers/w1/Kconfig" 949 950source "drivers/hwmon/Kconfig" 951 952#source "drivers/l3/Kconfig" 953 954source "drivers/misc/Kconfig" 955 956source "drivers/mfd/Kconfig" 957 958source "drivers/leds/Kconfig" 959 960source "drivers/media/Kconfig" 961 962source "drivers/video/Kconfig" 963 964source "sound/Kconfig" 965 966source "drivers/hid/Kconfig" 967 968source "drivers/usb/Kconfig" 969 970source "drivers/mmc/Kconfig" 971 972source "drivers/rtc/Kconfig" 973 974endmenu 975 976source "fs/Kconfig" 977 978source "arch/arm/oprofile/Kconfig" 979 980source "arch/arm/Kconfig.debug" 981 982source "security/Kconfig" 983 984source "crypto/Kconfig" 985 986source "lib/Kconfig" 987