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