1# 2# For a description of the syntax of this configuration file, 3# see Documentation/kbuild/kconfig-language.txt. 4# 5 6mainmenu "Linux Kernel Configuration" 7 8config ARM 9 bool 10 default y 11 select HAVE_AOUT 12 select HAVE_IDE 13 select RTC_LIB 14 select SYS_SUPPORTS_APM_EMULATION 15 select GENERIC_ATOMIC64 if (!CPU_32v6K) 16 select HAVE_OPROFILE if (HAVE_PERF_EVENTS) 17 select HAVE_ARCH_KGDB 18 select HAVE_KPROBES if (!XIP_KERNEL) 19 select HAVE_KRETPROBES if (HAVE_KPROBES) 20 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 21 select HAVE_GENERIC_DMA_COHERENT 22 select HAVE_KERNEL_GZIP 23 select HAVE_KERNEL_LZO 24 select HAVE_KERNEL_LZMA 25 select HAVE_PERF_EVENTS 26 select PERF_USE_VMALLOC 27 help 28 The ARM series is a line of low-power-consumption RISC chip designs 29 licensed by ARM Ltd and targeted at embedded applications and 30 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 31 manufactured, but legacy ARM-based PC hardware remains popular in 32 Europe. There is an ARM Linux project with a web page at 33 <http://www.arm.linux.org.uk/>. 34 35config HAVE_PWM 36 bool 37 38config SYS_SUPPORTS_APM_EMULATION 39 bool 40 41config GENERIC_GPIO 42 bool 43 44config GENERIC_TIME 45 bool 46 default y 47 48config ARCH_USES_GETTIMEOFFSET 49 bool 50 default n 51 52config GENERIC_CLOCKEVENTS 53 bool 54 55config GENERIC_CLOCKEVENTS_BROADCAST 56 bool 57 depends on GENERIC_CLOCKEVENTS 58 default y if SMP && !LOCAL_TIMERS 59 60config HAVE_TCM 61 bool 62 select GENERIC_ALLOCATOR 63 64config HAVE_PROC_CPU 65 bool 66 67config NO_IOPORT 68 bool 69 70config EISA 71 bool 72 ---help--- 73 The Extended Industry Standard Architecture (EISA) bus was 74 developed as an open alternative to the IBM MicroChannel bus. 75 76 The EISA bus provided some of the features of the IBM MicroChannel 77 bus while maintaining backward compatibility with cards made for 78 the older ISA bus. The EISA bus saw limited use between 1988 and 79 1995 when it was made obsolete by the PCI bus. 80 81 Say Y here if you are building a kernel for an EISA-based machine. 82 83 Otherwise, say N. 84 85config SBUS 86 bool 87 88config MCA 89 bool 90 help 91 MicroChannel Architecture is found in some IBM PS/2 machines and 92 laptops. It is a bus system similar to PCI or ISA. See 93 <file:Documentation/mca.txt> (and especially the web page given 94 there) before attempting to build an MCA bus kernel. 95 96config GENERIC_HARDIRQS 97 bool 98 default y 99 100config STACKTRACE_SUPPORT 101 bool 102 default y 103 104config HAVE_LATENCYTOP_SUPPORT 105 bool 106 depends on !SMP 107 default y 108 109config LOCKDEP_SUPPORT 110 bool 111 default y 112 113config TRACE_IRQFLAGS_SUPPORT 114 bool 115 default y 116 117config HARDIRQS_SW_RESEND 118 bool 119 default y 120 121config GENERIC_IRQ_PROBE 122 bool 123 default y 124 125config GENERIC_LOCKBREAK 126 bool 127 default y 128 depends on SMP && PREEMPT 129 130config RWSEM_GENERIC_SPINLOCK 131 bool 132 default y 133 134config RWSEM_XCHGADD_ALGORITHM 135 bool 136 137config ARCH_HAS_ILOG2_U32 138 bool 139 140config ARCH_HAS_ILOG2_U64 141 bool 142 143config ARCH_HAS_CPUFREQ 144 bool 145 help 146 Internal node to signify that the ARCH has CPUFREQ support 147 and that the relevant menu configurations are displayed for 148 it. 149 150config GENERIC_HWEIGHT 151 bool 152 default y 153 154config GENERIC_CALIBRATE_DELAY 155 bool 156 default y 157 158config ARCH_MAY_HAVE_PC_FDC 159 bool 160 161config ZONE_DMA 162 bool 163 164config NEED_DMA_MAP_STATE 165 def_bool y 166 167config GENERIC_ISA_DMA 168 bool 169 170config FIQ 171 bool 172 173config ARCH_MTD_XIP 174 bool 175 176config GENERIC_HARDIRQS_NO__DO_IRQ 177 def_bool y 178 179config ARM_L1_CACHE_SHIFT_6 180 bool 181 help 182 Setting ARM L1 cache line size to 64 Bytes. 183 184config VECTORS_BASE 185 hex 186 default 0xffff0000 if MMU || CPU_HIGH_VECTOR 187 default DRAM_BASE if REMAP_VECTORS_TO_RAM 188 default 0x00000000 189 help 190 The base address of exception vectors. 191 192source "init/Kconfig" 193 194source "kernel/Kconfig.freezer" 195 196menu "System Type" 197 198config MMU 199 bool "MMU-based Paged Memory Management Support" 200 default y 201 help 202 Select if you want MMU-based virtualised addressing space 203 support by paged memory management. If unsure, say 'Y'. 204 205# 206# The "ARM system type" choice list is ordered alphabetically by option 207# text. Please add new entries in the option alphabetic order. 208# 209choice 210 prompt "ARM system type" 211 default ARCH_VERSATILE 212 213config ARCH_AAEC2000 214 bool "Agilent AAEC-2000 based" 215 select CPU_ARM920T 216 select ARM_AMBA 217 select HAVE_CLK 218 select ARCH_USES_GETTIMEOFFSET 219 help 220 This enables support for systems based on the Agilent AAEC-2000 221 222config ARCH_INTEGRATOR 223 bool "ARM Ltd. Integrator family" 224 select ARM_AMBA 225 select ARCH_HAS_CPUFREQ 226 select COMMON_CLKDEV 227 select ICST 228 select GENERIC_CLOCKEVENTS 229 select PLAT_VERSATILE 230 help 231 Support for ARM's Integrator platform. 232 233config ARCH_REALVIEW 234 bool "ARM Ltd. RealView family" 235 select ARM_AMBA 236 select COMMON_CLKDEV 237 select ICST 238 select GENERIC_CLOCKEVENTS 239 select ARCH_WANT_OPTIONAL_GPIOLIB 240 select PLAT_VERSATILE 241 select ARM_TIMER_SP804 242 select GPIO_PL061 if GPIOLIB 243 help 244 This enables support for ARM Ltd RealView boards. 245 246config ARCH_VERSATILE 247 bool "ARM Ltd. Versatile family" 248 select ARM_AMBA 249 select ARM_VIC 250 select COMMON_CLKDEV 251 select ICST 252 select GENERIC_CLOCKEVENTS 253 select ARCH_WANT_OPTIONAL_GPIOLIB 254 select PLAT_VERSATILE 255 select ARM_TIMER_SP804 256 help 257 This enables support for ARM Ltd Versatile board. 258 259config ARCH_VEXPRESS 260 bool "ARM Ltd. Versatile Express family" 261 select ARCH_WANT_OPTIONAL_GPIOLIB 262 select ARM_AMBA 263 select ARM_TIMER_SP804 264 select COMMON_CLKDEV 265 select GENERIC_CLOCKEVENTS 266 select HAVE_CLK 267 select ICST 268 select PLAT_VERSATILE 269 help 270 This enables support for the ARM Ltd Versatile Express boards. 271 272config ARCH_AT91 273 bool "Atmel AT91" 274 select ARCH_REQUIRE_GPIOLIB 275 select HAVE_CLK 276 select ARCH_USES_GETTIMEOFFSET 277 help 278 This enables support for systems based on the Atmel AT91RM9200, 279 AT91SAM9 and AT91CAP9 processors. 280 281config ARCH_BCMRING 282 bool "Broadcom BCMRING" 283 depends on MMU 284 select CPU_V6 285 select ARM_AMBA 286 select COMMON_CLKDEV 287 select GENERIC_CLOCKEVENTS 288 select ARCH_WANT_OPTIONAL_GPIOLIB 289 help 290 Support for Broadcom's BCMRing platform. 291 292config ARCH_CLPS711X 293 bool "Cirrus Logic CLPS711x/EP721x-based" 294 select CPU_ARM720T 295 select ARCH_USES_GETTIMEOFFSET 296 help 297 Support for Cirrus Logic 711x/721x based boards. 298 299config ARCH_CNS3XXX 300 bool "Cavium Networks CNS3XXX family" 301 select CPU_V6 302 select GENERIC_CLOCKEVENTS 303 select ARM_GIC 304 help 305 Support for Cavium Networks CNS3XXX platform. 306 307config ARCH_GEMINI 308 bool "Cortina Systems Gemini" 309 select CPU_FA526 310 select ARCH_REQUIRE_GPIOLIB 311 select ARCH_USES_GETTIMEOFFSET 312 help 313 Support for the Cortina Systems Gemini family SoCs 314 315config ARCH_EBSA110 316 bool "EBSA-110" 317 select CPU_SA110 318 select ISA 319 select NO_IOPORT 320 select ARCH_USES_GETTIMEOFFSET 321 help 322 This is an evaluation board for the StrongARM processor available 323 from Digital. It has limited hardware on-board, including an 324 Ethernet interface, two PCMCIA sockets, two serial ports and a 325 parallel port. 326 327config ARCH_EP93XX 328 bool "EP93xx-based" 329 select CPU_ARM920T 330 select ARM_AMBA 331 select ARM_VIC 332 select COMMON_CLKDEV 333 select ARCH_REQUIRE_GPIOLIB 334 select ARCH_HAS_HOLES_MEMORYMODEL 335 select ARCH_USES_GETTIMEOFFSET 336 help 337 This enables support for the Cirrus EP93xx series of CPUs. 338 339config ARCH_FOOTBRIDGE 340 bool "FootBridge" 341 select CPU_SA110 342 select FOOTBRIDGE 343 select ARCH_USES_GETTIMEOFFSET 344 help 345 Support for systems based on the DC21285 companion chip 346 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 347 348config ARCH_MXC 349 bool "Freescale MXC/iMX-based" 350 select GENERIC_CLOCKEVENTS 351 select ARCH_REQUIRE_GPIOLIB 352 select COMMON_CLKDEV 353 help 354 Support for Freescale MXC/iMX-based family of processors 355 356config ARCH_STMP3XXX 357 bool "Freescale STMP3xxx" 358 select CPU_ARM926T 359 select COMMON_CLKDEV 360 select ARCH_REQUIRE_GPIOLIB 361 select GENERIC_CLOCKEVENTS 362 select USB_ARCH_HAS_EHCI 363 help 364 Support for systems based on the Freescale 3xxx CPUs. 365 366config ARCH_NETX 367 bool "Hilscher NetX based" 368 select CPU_ARM926T 369 select ARM_VIC 370 select GENERIC_CLOCKEVENTS 371 help 372 This enables support for systems based on the Hilscher NetX Soc 373 374config ARCH_H720X 375 bool "Hynix HMS720x-based" 376 select CPU_ARM720T 377 select ISA_DMA_API 378 select ARCH_USES_GETTIMEOFFSET 379 help 380 This enables support for systems based on the Hynix HMS720x 381 382config ARCH_IOP13XX 383 bool "IOP13xx-based" 384 depends on MMU 385 select CPU_XSC3 386 select PLAT_IOP 387 select PCI 388 select ARCH_SUPPORTS_MSI 389 select VMSPLIT_1G 390 help 391 Support for Intel's IOP13XX (XScale) family of processors. 392 393config ARCH_IOP32X 394 bool "IOP32x-based" 395 depends on MMU 396 select CPU_XSCALE 397 select PLAT_IOP 398 select PCI 399 select ARCH_REQUIRE_GPIOLIB 400 help 401 Support for Intel's 80219 and IOP32X (XScale) family of 402 processors. 403 404config ARCH_IOP33X 405 bool "IOP33x-based" 406 depends on MMU 407 select CPU_XSCALE 408 select PLAT_IOP 409 select PCI 410 select ARCH_REQUIRE_GPIOLIB 411 help 412 Support for Intel's IOP33X (XScale) family of processors. 413 414config ARCH_IXP23XX 415 bool "IXP23XX-based" 416 depends on MMU 417 select CPU_XSC3 418 select PCI 419 select ARCH_USES_GETTIMEOFFSET 420 help 421 Support for Intel's IXP23xx (XScale) family of processors. 422 423config ARCH_IXP2000 424 bool "IXP2400/2800-based" 425 depends on MMU 426 select CPU_XSCALE 427 select PCI 428 select ARCH_USES_GETTIMEOFFSET 429 help 430 Support for Intel's IXP2400/2800 (XScale) family of processors. 431 432config ARCH_IXP4XX 433 bool "IXP4xx-based" 434 depends on MMU 435 select CPU_XSCALE 436 select GENERIC_GPIO 437 select GENERIC_CLOCKEVENTS 438 select DMABOUNCE if PCI 439 help 440 Support for Intel's IXP4XX (XScale) family of processors. 441 442config ARCH_L7200 443 bool "LinkUp-L7200" 444 select CPU_ARM720T 445 select FIQ 446 select ARCH_USES_GETTIMEOFFSET 447 help 448 Say Y here if you intend to run this kernel on a LinkUp Systems 449 L7200 Software Development Board which uses an ARM720T processor. 450 Information on this board can be obtained at: 451 452 <http://www.linkupsys.com/> 453 454 If you have any questions or comments about the Linux kernel port 455 to this board, send e-mail to <sjhill@cotw.com>. 456 457config ARCH_DOVE 458 bool "Marvell Dove" 459 select PCI 460 select ARCH_REQUIRE_GPIOLIB 461 select GENERIC_CLOCKEVENTS 462 select PLAT_ORION 463 help 464 Support for the Marvell Dove SoC 88AP510 465 466config ARCH_KIRKWOOD 467 bool "Marvell Kirkwood" 468 select CPU_FEROCEON 469 select PCI 470 select ARCH_REQUIRE_GPIOLIB 471 select GENERIC_CLOCKEVENTS 472 select PLAT_ORION 473 help 474 Support for the following Marvell Kirkwood series SoCs: 475 88F6180, 88F6192 and 88F6281. 476 477config ARCH_LOKI 478 bool "Marvell Loki (88RC8480)" 479 select CPU_FEROCEON 480 select GENERIC_CLOCKEVENTS 481 select PLAT_ORION 482 help 483 Support for the Marvell Loki (88RC8480) SoC. 484 485config ARCH_MV78XX0 486 bool "Marvell MV78xx0" 487 select CPU_FEROCEON 488 select PCI 489 select ARCH_REQUIRE_GPIOLIB 490 select GENERIC_CLOCKEVENTS 491 select PLAT_ORION 492 help 493 Support for the following Marvell MV78xx0 series SoCs: 494 MV781x0, MV782x0. 495 496config ARCH_ORION5X 497 bool "Marvell Orion" 498 depends on MMU 499 select CPU_FEROCEON 500 select PCI 501 select ARCH_REQUIRE_GPIOLIB 502 select GENERIC_CLOCKEVENTS 503 select PLAT_ORION 504 help 505 Support for the following Marvell Orion 5x series SoCs: 506 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 507 Orion-2 (5281), Orion-1-90 (6183). 508 509config ARCH_MMP 510 bool "Marvell PXA168/910/MMP2" 511 depends on MMU 512 select ARCH_REQUIRE_GPIOLIB 513 select COMMON_CLKDEV 514 select GENERIC_CLOCKEVENTS 515 select TICK_ONESHOT 516 select PLAT_PXA 517 help 518 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. 519 520config ARCH_KS8695 521 bool "Micrel/Kendin KS8695" 522 select CPU_ARM922T 523 select ARCH_REQUIRE_GPIOLIB 524 select ARCH_USES_GETTIMEOFFSET 525 help 526 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 527 System-on-Chip devices. 528 529config ARCH_NS9XXX 530 bool "NetSilicon NS9xxx" 531 select CPU_ARM926T 532 select GENERIC_GPIO 533 select GENERIC_CLOCKEVENTS 534 select HAVE_CLK 535 help 536 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx 537 System. 538 539 <http://www.digi.com/products/microprocessors/index.jsp> 540 541config ARCH_W90X900 542 bool "Nuvoton W90X900 CPU" 543 select CPU_ARM926T 544 select ARCH_REQUIRE_GPIOLIB 545 select COMMON_CLKDEV 546 select GENERIC_CLOCKEVENTS 547 help 548 Support for Nuvoton (Winbond logic dept.) ARM9 processor, 549 At present, the w90x900 has been renamed nuc900, regarding 550 the ARM series product line, you can login the following 551 link address to know more. 552 553 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ 554 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> 555 556config ARCH_NUC93X 557 bool "Nuvoton NUC93X CPU" 558 select CPU_ARM926T 559 select COMMON_CLKDEV 560 help 561 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a 562 low-power and high performance MPEG-4/JPEG multimedia controller chip. 563 564config ARCH_PNX4008 565 bool "Philips Nexperia PNX4008 Mobile" 566 select CPU_ARM926T 567 select COMMON_CLKDEV 568 select ARCH_USES_GETTIMEOFFSET 569 help 570 This enables support for Philips PNX4008 mobile platform. 571 572config ARCH_PXA 573 bool "PXA2xx/PXA3xx-based" 574 depends on MMU 575 select ARCH_MTD_XIP 576 select ARCH_HAS_CPUFREQ 577 select COMMON_CLKDEV 578 select ARCH_REQUIRE_GPIOLIB 579 select GENERIC_CLOCKEVENTS 580 select TICK_ONESHOT 581 select PLAT_PXA 582 help 583 Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 584 585config ARCH_MSM 586 bool "Qualcomm MSM" 587 select HAVE_CLK 588 select GENERIC_CLOCKEVENTS 589 help 590 Support for Qualcomm MSM/QSD based systems. This runs on the 591 apps processor of the MSM/QSD and depends on a shared memory 592 interface to the modem processor which runs the baseband 593 stack and controls some vital subsystems 594 (clock and power control, etc). 595 596config ARCH_SHMOBILE 597 bool "Renesas SH-Mobile" 598 help 599 Support for Renesas's SH-Mobile ARM platforms 600 601config ARCH_RPC 602 bool "RiscPC" 603 select ARCH_ACORN 604 select FIQ 605 select TIMER_ACORN 606 select ARCH_MAY_HAVE_PC_FDC 607 select HAVE_PATA_PLATFORM 608 select ISA_DMA_API 609 select NO_IOPORT 610 select ARCH_SPARSEMEM_ENABLE 611 select ARCH_USES_GETTIMEOFFSET 612 help 613 On the Acorn Risc-PC, Linux can support the internal IDE disk and 614 CD-ROM interface, serial and parallel port, and the floppy drive. 615 616config ARCH_SA1100 617 bool "SA1100-based" 618 select CPU_SA1100 619 select ISA 620 select ARCH_SPARSEMEM_ENABLE 621 select ARCH_MTD_XIP 622 select ARCH_HAS_CPUFREQ 623 select CPU_FREQ 624 select GENERIC_CLOCKEVENTS 625 select HAVE_CLK 626 select TICK_ONESHOT 627 select ARCH_REQUIRE_GPIOLIB 628 help 629 Support for StrongARM 11x0 based boards. 630 631config ARCH_S3C2410 632 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450" 633 select GENERIC_GPIO 634 select ARCH_HAS_CPUFREQ 635 select HAVE_CLK 636 select ARCH_USES_GETTIMEOFFSET 637 help 638 Samsung S3C2410X CPU based systems, such as the Simtec Electronics 639 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 640 the Samsung SMDK2410 development board (and derivatives). 641 642 Note, the S3C2416 and the S3C2450 are so close that they even share 643 the same SoC ID code. This means that there is no seperate machine 644 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first. 645 646config ARCH_S3C64XX 647 bool "Samsung S3C64XX" 648 select PLAT_SAMSUNG 649 select CPU_V6 650 select ARM_VIC 651 select HAVE_CLK 652 select NO_IOPORT 653 select ARCH_USES_GETTIMEOFFSET 654 select ARCH_HAS_CPUFREQ 655 select ARCH_REQUIRE_GPIOLIB 656 select SAMSUNG_CLKSRC 657 select SAMSUNG_IRQ_VIC_TIMER 658 select SAMSUNG_IRQ_UART 659 select S3C_GPIO_TRACK 660 select S3C_GPIO_PULL_UPDOWN 661 select S3C_GPIO_CFG_S3C24XX 662 select S3C_GPIO_CFG_S3C64XX 663 select S3C_DEV_NAND 664 select USB_ARCH_HAS_OHCI 665 select SAMSUNG_GPIOLIB_4BIT 666 help 667 Samsung S3C64XX series based systems 668 669config ARCH_S5P6440 670 bool "Samsung S5P6440" 671 select CPU_V6 672 select GENERIC_GPIO 673 select HAVE_CLK 674 help 675 Samsung S5P6440 CPU based systems 676 677config ARCH_S5P6442 678 bool "Samsung S5P6442" 679 select CPU_V6 680 select GENERIC_GPIO 681 select HAVE_CLK 682 help 683 Samsung S5P6442 CPU based systems 684 685config ARCH_S5PC1XX 686 bool "Samsung S5PC1XX" 687 select GENERIC_GPIO 688 select HAVE_CLK 689 select CPU_V7 690 select ARM_L1_CACHE_SHIFT_6 691 help 692 Samsung S5PC1XX series based systems 693 694config ARCH_S5PV210 695 bool "Samsung S5PV210/S5PC110" 696 select CPU_V7 697 select GENERIC_GPIO 698 select HAVE_CLK 699 select ARM_L1_CACHE_SHIFT_6 700 help 701 Samsung S5PV210/S5PC110 series based systems 702 703config ARCH_SHARK 704 bool "Shark" 705 select CPU_SA110 706 select ISA 707 select ISA_DMA 708 select ZONE_DMA 709 select PCI 710 select ARCH_USES_GETTIMEOFFSET 711 help 712 Support for the StrongARM based Digital DNARD machine, also known 713 as "Shark" (<http://www.shark-linux.de/shark.html>). 714 715config ARCH_LH7A40X 716 bool "Sharp LH7A40X" 717 select CPU_ARM922T 718 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM 719 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM 720 select ARCH_USES_GETTIMEOFFSET 721 help 722 Say Y here for systems based on one of the Sharp LH7A40X 723 System on a Chip processors. These CPUs include an ARM922T 724 core with a wide array of integrated devices for 725 hand-held and low-power applications. 726 727config ARCH_U300 728 bool "ST-Ericsson U300 Series" 729 depends on MMU 730 select CPU_ARM926T 731 select HAVE_TCM 732 select ARM_AMBA 733 select ARM_VIC 734 select GENERIC_CLOCKEVENTS 735 select COMMON_CLKDEV 736 select GENERIC_GPIO 737 help 738 Support for ST-Ericsson U300 series mobile platforms. 739 740config ARCH_U8500 741 bool "ST-Ericsson U8500 Series" 742 select CPU_V7 743 select ARM_AMBA 744 select GENERIC_CLOCKEVENTS 745 select COMMON_CLKDEV 746 select ARCH_REQUIRE_GPIOLIB 747 help 748 Support for ST-Ericsson's Ux500 architecture 749 750config ARCH_NOMADIK 751 bool "STMicroelectronics Nomadik" 752 select ARM_AMBA 753 select ARM_VIC 754 select CPU_ARM926T 755 select COMMON_CLKDEV 756 select GENERIC_CLOCKEVENTS 757 select ARCH_REQUIRE_GPIOLIB 758 help 759 Support for the Nomadik platform by ST-Ericsson 760 761config ARCH_DAVINCI 762 bool "TI DaVinci" 763 select GENERIC_CLOCKEVENTS 764 select ARCH_REQUIRE_GPIOLIB 765 select ZONE_DMA 766 select HAVE_IDE 767 select COMMON_CLKDEV 768 select GENERIC_ALLOCATOR 769 select ARCH_HAS_HOLES_MEMORYMODEL 770 help 771 Support for TI's DaVinci platform. 772 773config ARCH_OMAP 774 bool "TI OMAP" 775 select HAVE_CLK 776 select ARCH_REQUIRE_GPIOLIB 777 select ARCH_HAS_CPUFREQ 778 select GENERIC_CLOCKEVENTS 779 select ARCH_HAS_HOLES_MEMORYMODEL 780 help 781 Support for TI's OMAP platform (OMAP1 and OMAP2). 782 783config PLAT_SPEAR 784 bool "ST SPEAr" 785 select ARM_AMBA 786 select ARCH_REQUIRE_GPIOLIB 787 select COMMON_CLKDEV 788 select GENERIC_CLOCKEVENTS 789 select HAVE_CLK 790 help 791 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx). 792 793endchoice 794 795# 796# This is sorted alphabetically by mach-* pathname. However, plat-* 797# Kconfigs may be included either alphabetically (according to the 798# plat- suffix) or along side the corresponding mach-* source. 799# 800source "arch/arm/mach-aaec2000/Kconfig" 801 802source "arch/arm/mach-at91/Kconfig" 803 804source "arch/arm/mach-bcmring/Kconfig" 805 806source "arch/arm/mach-clps711x/Kconfig" 807 808source "arch/arm/mach-cns3xxx/Kconfig" 809 810source "arch/arm/mach-davinci/Kconfig" 811 812source "arch/arm/mach-dove/Kconfig" 813 814source "arch/arm/mach-ep93xx/Kconfig" 815 816source "arch/arm/mach-footbridge/Kconfig" 817 818source "arch/arm/mach-gemini/Kconfig" 819 820source "arch/arm/mach-h720x/Kconfig" 821 822source "arch/arm/mach-integrator/Kconfig" 823 824source "arch/arm/mach-iop32x/Kconfig" 825 826source "arch/arm/mach-iop33x/Kconfig" 827 828source "arch/arm/mach-iop13xx/Kconfig" 829 830source "arch/arm/mach-ixp4xx/Kconfig" 831 832source "arch/arm/mach-ixp2000/Kconfig" 833 834source "arch/arm/mach-ixp23xx/Kconfig" 835 836source "arch/arm/mach-kirkwood/Kconfig" 837 838source "arch/arm/mach-ks8695/Kconfig" 839 840source "arch/arm/mach-lh7a40x/Kconfig" 841 842source "arch/arm/mach-loki/Kconfig" 843 844source "arch/arm/mach-msm/Kconfig" 845 846source "arch/arm/mach-mv78xx0/Kconfig" 847 848source "arch/arm/plat-mxc/Kconfig" 849 850source "arch/arm/mach-netx/Kconfig" 851 852source "arch/arm/mach-nomadik/Kconfig" 853source "arch/arm/plat-nomadik/Kconfig" 854 855source "arch/arm/mach-ns9xxx/Kconfig" 856 857source "arch/arm/mach-nuc93x/Kconfig" 858 859source "arch/arm/plat-omap/Kconfig" 860 861source "arch/arm/mach-omap1/Kconfig" 862 863source "arch/arm/mach-omap2/Kconfig" 864 865source "arch/arm/mach-orion5x/Kconfig" 866 867source "arch/arm/mach-pxa/Kconfig" 868source "arch/arm/plat-pxa/Kconfig" 869 870source "arch/arm/mach-mmp/Kconfig" 871 872source "arch/arm/mach-realview/Kconfig" 873 874source "arch/arm/mach-sa1100/Kconfig" 875 876source "arch/arm/plat-samsung/Kconfig" 877source "arch/arm/plat-s3c24xx/Kconfig" 878source "arch/arm/plat-s5p/Kconfig" 879source "arch/arm/plat-s5pc1xx/Kconfig" 880source "arch/arm/plat-spear/Kconfig" 881 882if ARCH_S3C2410 883source "arch/arm/mach-s3c2400/Kconfig" 884source "arch/arm/mach-s3c2410/Kconfig" 885source "arch/arm/mach-s3c2412/Kconfig" 886source "arch/arm/mach-s3c2416/Kconfig" 887source "arch/arm/mach-s3c2440/Kconfig" 888source "arch/arm/mach-s3c2443/Kconfig" 889endif 890 891if ARCH_S3C64XX 892source "arch/arm/mach-s3c64xx/Kconfig" 893endif 894 895source "arch/arm/mach-s5p6440/Kconfig" 896 897source "arch/arm/mach-s5p6442/Kconfig" 898 899if ARCH_S5PC1XX 900source "arch/arm/mach-s5pc100/Kconfig" 901endif 902 903source "arch/arm/mach-s5pv210/Kconfig" 904 905source "arch/arm/mach-shmobile/Kconfig" 906 907source "arch/arm/plat-stmp3xxx/Kconfig" 908 909source "arch/arm/mach-u300/Kconfig" 910 911source "arch/arm/mach-ux500/Kconfig" 912 913source "arch/arm/mach-versatile/Kconfig" 914 915source "arch/arm/mach-vexpress/Kconfig" 916 917source "arch/arm/mach-w90x900/Kconfig" 918 919# Definitions to make life easier 920config ARCH_ACORN 921 bool 922 923config PLAT_IOP 924 bool 925 select GENERIC_CLOCKEVENTS 926 927config PLAT_ORION 928 bool 929 930config PLAT_PXA 931 bool 932 933config PLAT_VERSATILE 934 bool 935 936config ARM_TIMER_SP804 937 bool 938 939source arch/arm/mm/Kconfig 940 941config IWMMXT 942 bool "Enable iWMMXt support" 943 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK 944 default y if PXA27x || PXA3xx || ARCH_MMP 945 help 946 Enable support for iWMMXt context switching at run time if 947 running on a CPU that supports it. 948 949# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 950config XSCALE_PMU 951 bool 952 depends on CPU_XSCALE && !XSCALE_PMU_TIMER 953 default y 954 955config CPU_HAS_PMU 956 depends on CPU_V6 || CPU_V7 || XSCALE_PMU 957 default y 958 bool 959 960if !MMU 961source "arch/arm/Kconfig-nommu" 962endif 963 964config ARM_ERRATA_411920 965 bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 966 depends on CPU_V6 && !SMP 967 help 968 Invalidation of the Instruction Cache operation can 969 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 970 It does not affect the MPCore. This option enables the ARM Ltd. 971 recommended workaround. 972 973config ARM_ERRATA_430973 974 bool "ARM errata: Stale prediction on replaced interworking branch" 975 depends on CPU_V7 976 help 977 This option enables the workaround for the 430973 Cortex-A8 978 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 979 interworking branch is replaced with another code sequence at the 980 same virtual address, whether due to self-modifying code or virtual 981 to physical address re-mapping, Cortex-A8 does not recover from the 982 stale interworking branch prediction. This results in Cortex-A8 983 executing the new code sequence in the incorrect ARM or Thumb state. 984 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 985 and also flushes the branch target cache at every context switch. 986 Note that setting specific bits in the ACTLR register may not be 987 available in non-secure mode. 988 989config ARM_ERRATA_458693 990 bool "ARM errata: Processor deadlock when a false hazard is created" 991 depends on CPU_V7 992 help 993 This option enables the workaround for the 458693 Cortex-A8 (r2p0) 994 erratum. For very specific sequences of memory operations, it is 995 possible for a hazard condition intended for a cache line to instead 996 be incorrectly associated with a different cache line. This false 997 hazard might then cause a processor deadlock. The workaround enables 998 the L1 caching of the NEON accesses and disables the PLD instruction 999 in the ACTLR register. Note that setting specific bits in the ACTLR 1000 register may not be available in non-secure mode. 1001 1002config ARM_ERRATA_460075 1003 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 1004 depends on CPU_V7 1005 help 1006 This option enables the workaround for the 460075 Cortex-A8 (r2p0) 1007 erratum. Any asynchronous access to the L2 cache may encounter a 1008 situation in which recent store transactions to the L2 cache are lost 1009 and overwritten with stale memory contents from external memory. The 1010 workaround disables the write-allocate mode for the L2 cache via the 1011 ACTLR register. Note that setting specific bits in the ACTLR register 1012 may not be available in non-secure mode. 1013 1014config PL310_ERRATA_588369 1015 bool "Clean & Invalidate maintenance operations do not invalidate clean lines" 1016 depends on CACHE_L2X0 && ARCH_OMAP4 1017 help 1018 The PL310 L2 cache controller implements three types of Clean & 1019 Invalidate maintenance operations: by Physical Address 1020 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC). 1021 They are architecturally defined to behave as the execution of a 1022 clean operation followed immediately by an invalidate operation, 1023 both performing to the same memory location. This functionality 1024 is not correctly implemented in PL310 as clean lines are not 1025 invalidated as a result of these operations. Note that this errata 1026 uses Texas Instrument's secure monitor api. 1027endmenu 1028 1029source "arch/arm/common/Kconfig" 1030 1031config FORCE_MAX_ZONEORDER 1032 int 1033 depends on SA1111 1034 default "9" 1035 1036menu "Bus support" 1037 1038config ARM_AMBA 1039 bool 1040 1041config ISA 1042 bool 1043 help 1044 Find out whether you have ISA slots on your motherboard. ISA is the 1045 name of a bus system, i.e. the way the CPU talks to the other stuff 1046 inside your box. Other bus systems are PCI, EISA, MicroChannel 1047 (MCA) or VESA. ISA is an older system, now being displaced by PCI; 1048 newer boards don't support it. If you have ISA, say Y, otherwise N. 1049 1050# Select ISA DMA controller support 1051config ISA_DMA 1052 bool 1053 select ISA_DMA_API 1054 1055# Select ISA DMA interface 1056config ISA_DMA_API 1057 bool 1058 1059config PCI 1060 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE 1061 help 1062 Find out whether you have a PCI motherboard. PCI is the name of a 1063 bus system, i.e. the way the CPU talks to the other stuff inside 1064 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 1065 VESA. If you have PCI, say Y, otherwise N. 1066 1067config PCI_DOMAINS 1068 bool 1069 depends on PCI 1070 1071config PCI_SYSCALL 1072 def_bool PCI 1073 1074# Select the host bridge type 1075config PCI_HOST_VIA82C505 1076 bool 1077 depends on PCI && ARCH_SHARK 1078 default y 1079 1080config PCI_HOST_ITE8152 1081 bool 1082 depends on PCI && MACH_ARMCORE 1083 default y 1084 select DMABOUNCE 1085 1086source "drivers/pci/Kconfig" 1087 1088source "drivers/pcmcia/Kconfig" 1089 1090endmenu 1091 1092menu "Kernel Features" 1093 1094source "kernel/time/Kconfig" 1095 1096config SMP 1097 bool "Symmetric Multi-Processing (EXPERIMENTAL)" 1098 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\ 1099 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\ 1100 ARCH_U8500 || ARCH_VEXPRESS_CA9X4) 1101 depends on GENERIC_CLOCKEVENTS 1102 select USE_GENERIC_SMP_HELPERS 1103 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4) 1104 help 1105 This enables support for systems with more than one CPU. If you have 1106 a system with only one CPU, like most personal computers, say N. If 1107 you have a system with more than one CPU, say Y. 1108 1109 If you say N here, the kernel will run on single and multiprocessor 1110 machines, but will use only one CPU of a multiprocessor machine. If 1111 you say Y here, the kernel will run on many, but not all, single 1112 processor machines. On a single processor machine, the kernel will 1113 run faster if you say N here. 1114 1115 See also <file:Documentation/i386/IO-APIC.txt>, 1116 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 1117 <http://www.linuxdoc.org/docs.html#howto>. 1118 1119 If you don't know what to do here, say N. 1120 1121config HAVE_ARM_SCU 1122 bool 1123 depends on SMP 1124 help 1125 This option enables support for the ARM system coherency unit 1126 1127config HAVE_ARM_TWD 1128 bool 1129 depends on SMP 1130 help 1131 This options enables support for the ARM timer and watchdog unit 1132 1133choice 1134 prompt "Memory split" 1135 default VMSPLIT_3G 1136 help 1137 Select the desired split between kernel and user memory. 1138 1139 If you are not absolutely sure what you are doing, leave this 1140 option alone! 1141 1142 config VMSPLIT_3G 1143 bool "3G/1G user/kernel split" 1144 config VMSPLIT_2G 1145 bool "2G/2G user/kernel split" 1146 config VMSPLIT_1G 1147 bool "1G/3G user/kernel split" 1148endchoice 1149 1150config PAGE_OFFSET 1151 hex 1152 default 0x40000000 if VMSPLIT_1G 1153 default 0x80000000 if VMSPLIT_2G 1154 default 0xC0000000 1155 1156config NR_CPUS 1157 int "Maximum number of CPUs (2-32)" 1158 range 2 32 1159 depends on SMP 1160 default "4" 1161 1162config HOTPLUG_CPU 1163 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 1164 depends on SMP && HOTPLUG && EXPERIMENTAL 1165 help 1166 Say Y here to experiment with turning CPUs off and on. CPUs 1167 can be controlled through /sys/devices/system/cpu. 1168 1169config LOCAL_TIMERS 1170 bool "Use local timer interrupts" 1171 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \ 1172 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500) 1173 default y 1174 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500) 1175 help 1176 Enable support for local timers on SMP platforms, rather then the 1177 legacy IPI broadcast method. Local timers allows the system 1178 accounting to be spread across the timer interval, preventing a 1179 "thundering herd" at every timer tick. 1180 1181source kernel/Kconfig.preempt 1182 1183config HZ 1184 int 1185 default 128 if ARCH_L7200 1186 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210 1187 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER 1188 default AT91_TIMER_HZ if ARCH_AT91 1189 default 100 1190 1191config THUMB2_KERNEL 1192 bool "Compile the kernel in Thumb-2 mode" 1193 depends on CPU_V7 && EXPERIMENTAL 1194 select AEABI 1195 select ARM_ASM_UNIFIED 1196 help 1197 By enabling this option, the kernel will be compiled in 1198 Thumb-2 mode. A compiler/assembler that understand the unified 1199 ARM-Thumb syntax is needed. 1200 1201 If unsure, say N. 1202 1203config ARM_ASM_UNIFIED 1204 bool 1205 1206config AEABI 1207 bool "Use the ARM EABI to compile the kernel" 1208 help 1209 This option allows for the kernel to be compiled using the latest 1210 ARM ABI (aka EABI). This is only useful if you are using a user 1211 space environment that is also compiled with EABI. 1212 1213 Since there are major incompatibilities between the legacy ABI and 1214 EABI, especially with regard to structure member alignment, this 1215 option also changes the kernel syscall calling convention to 1216 disambiguate both ABIs and allow for backward compatibility support 1217 (selected with CONFIG_OABI_COMPAT). 1218 1219 To use this you need GCC version 4.0.0 or later. 1220 1221config OABI_COMPAT 1222 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 1223 depends on AEABI && EXPERIMENTAL 1224 default y 1225 help 1226 This option preserves the old syscall interface along with the 1227 new (ARM EABI) one. It also provides a compatibility layer to 1228 intercept syscalls that have structure arguments which layout 1229 in memory differs between the legacy ABI and the new ARM EABI 1230 (only for non "thumb" binaries). This option adds a tiny 1231 overhead to all syscalls and produces a slightly larger kernel. 1232 If you know you'll be using only pure EABI user space then you 1233 can say N here. If this option is not selected and you attempt 1234 to execute a legacy ABI binary then the result will be 1235 UNPREDICTABLE (in fact it can be predicted that it won't work 1236 at all). If in doubt say Y. 1237 1238config ARCH_HAS_HOLES_MEMORYMODEL 1239 bool 1240 1241# Discontigmem is deprecated 1242config ARCH_DISCONTIGMEM_ENABLE 1243 bool 1244 1245config ARCH_SPARSEMEM_ENABLE 1246 bool 1247 1248config ARCH_SPARSEMEM_DEFAULT 1249 def_bool ARCH_SPARSEMEM_ENABLE 1250 1251config ARCH_SELECT_MEMORY_MODEL 1252 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE 1253 1254config NODES_SHIFT 1255 int 1256 default "4" if ARCH_LH7A40X 1257 default "2" 1258 depends on NEED_MULTIPLE_NODES 1259 1260config HIGHMEM 1261 bool "High Memory Support (EXPERIMENTAL)" 1262 depends on MMU && EXPERIMENTAL 1263 help 1264 The address space of ARM processors is only 4 Gigabytes large 1265 and it has to accommodate user address space, kernel address 1266 space as well as some memory mapped IO. That means that, if you 1267 have a large amount of physical memory and/or IO, not all of the 1268 memory can be "permanently mapped" by the kernel. The physical 1269 memory that is not permanently mapped is called "high memory". 1270 1271 Depending on the selected kernel/user memory split, minimum 1272 vmalloc space and actual amount of RAM, you may not need this 1273 option which should result in a slightly faster kernel. 1274 1275 If unsure, say n. 1276 1277config HIGHPTE 1278 bool "Allocate 2nd-level pagetables from highmem" 1279 depends on HIGHMEM 1280 depends on !OUTER_CACHE 1281 1282config HW_PERF_EVENTS 1283 bool "Enable hardware performance counter support for perf events" 1284 depends on PERF_EVENTS && CPU_HAS_PMU 1285 default y 1286 help 1287 Enable hardware performance counter support for perf events. If 1288 disabled, perf events will use software events only. 1289 1290source "mm/Kconfig" 1291 1292config LEDS 1293 bool "Timer and CPU usage LEDs" 1294 depends on ARCH_CDB89712 || ARCH_EBSA110 || \ 1295 ARCH_EBSA285 || ARCH_INTEGRATOR || \ 1296 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 1297 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 1298 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 1299 ARCH_AT91 || ARCH_DAVINCI || \ 1300 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW 1301 help 1302 If you say Y here, the LEDs on your machine will be used 1303 to provide useful information about your current system status. 1304 1305 If you are compiling a kernel for a NetWinder or EBSA-285, you will 1306 be able to select which LEDs are active using the options below. If 1307 you are compiling a kernel for the EBSA-110 or the LART however, the 1308 red LED will simply flash regularly to indicate that the system is 1309 still functional. It is safe to say Y here if you have a CATS 1310 system, but the driver will do nothing. 1311 1312config LEDS_TIMER 1313 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 1314 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1315 || MACH_OMAP_PERSEUS2 1316 depends on LEDS 1317 depends on !GENERIC_CLOCKEVENTS 1318 default y if ARCH_EBSA110 1319 help 1320 If you say Y here, one of the system LEDs (the green one on the 1321 NetWinder, the amber one on the EBSA285, or the red one on the LART) 1322 will flash regularly to indicate that the system is still 1323 operational. This is mainly useful to kernel hackers who are 1324 debugging unstable kernels. 1325 1326 The LART uses the same LED for both Timer LED and CPU usage LED 1327 functions. You may choose to use both, but the Timer LED function 1328 will overrule the CPU usage LED. 1329 1330config LEDS_CPU 1331 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 1332 !ARCH_OMAP) \ 1333 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ 1334 || MACH_OMAP_PERSEUS2 1335 depends on LEDS 1336 help 1337 If you say Y here, the red LED will be used to give a good real 1338 time indication of CPU usage, by lighting whenever the idle task 1339 is not currently executing. 1340 1341 The LART uses the same LED for both Timer LED and CPU usage LED 1342 functions. You may choose to use both, but the Timer LED function 1343 will overrule the CPU usage LED. 1344 1345config ALIGNMENT_TRAP 1346 bool 1347 depends on CPU_CP15_MMU 1348 default y if !ARCH_EBSA110 1349 select HAVE_PROC_CPU if PROC_FS 1350 help 1351 ARM processors cannot fetch/store information which is not 1352 naturally aligned on the bus, i.e., a 4 byte fetch must start at an 1353 address divisible by 4. On 32-bit ARM processors, these non-aligned 1354 fetch/store instructions will be emulated in software if you say 1355 here, which has a severe performance impact. This is necessary for 1356 correct operation of some network protocols. With an IP-only 1357 configuration it is safe to say N, otherwise say Y. 1358 1359config UACCESS_WITH_MEMCPY 1360 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)" 1361 depends on MMU && EXPERIMENTAL 1362 default y if CPU_FEROCEON 1363 help 1364 Implement faster copy_to_user and clear_user methods for CPU 1365 cores where a 8-word STM instruction give significantly higher 1366 memory write throughput than a sequence of individual 32bit stores. 1367 1368 A possible side effect is a slight increase in scheduling latency 1369 between threads sharing the same address space if they invoke 1370 such copy operations with large buffers. 1371 1372 However, if the CPU data cache is using a write-allocate mode, 1373 this option is unlikely to provide any performance gain. 1374 1375endmenu 1376 1377menu "Boot options" 1378 1379# Compressed boot loader in ROM. Yes, we really want to ask about 1380# TEXT and BSS so we preserve their values in the config files. 1381config ZBOOT_ROM_TEXT 1382 hex "Compressed ROM boot loader base address" 1383 default "0" 1384 help 1385 The physical address at which the ROM-able zImage is to be 1386 placed in the target. Platforms which normally make use of 1387 ROM-able zImage formats normally set this to a suitable 1388 value in their defconfig file. 1389 1390 If ZBOOT_ROM is not enabled, this has no effect. 1391 1392config ZBOOT_ROM_BSS 1393 hex "Compressed ROM boot loader BSS address" 1394 default "0" 1395 help 1396 The base address of an area of read/write memory in the target 1397 for the ROM-able zImage which must be available while the 1398 decompressor is running. It must be large enough to hold the 1399 entire decompressed kernel plus an additional 128 KiB. 1400 Platforms which normally make use of ROM-able zImage formats 1401 normally set this to a suitable value in their defconfig file. 1402 1403 If ZBOOT_ROM is not enabled, this has no effect. 1404 1405config ZBOOT_ROM 1406 bool "Compressed boot loader in ROM/flash" 1407 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 1408 help 1409 Say Y here if you intend to execute your compressed kernel image 1410 (zImage) directly from ROM or flash. If unsure, say N. 1411 1412config CMDLINE 1413 string "Default kernel command string" 1414 default "" 1415 help 1416 On some architectures (EBSA110 and CATS), there is currently no way 1417 for the boot loader to pass arguments to the kernel. For these 1418 architectures, you should supply some command-line options at build 1419 time by entering them here. As a minimum, you should specify the 1420 memory size and the root device (e.g., mem=64M root=/dev/nfs). 1421 1422config XIP_KERNEL 1423 bool "Kernel Execute-In-Place from ROM" 1424 depends on !ZBOOT_ROM 1425 help 1426 Execute-In-Place allows the kernel to run from non-volatile storage 1427 directly addressable by the CPU, such as NOR flash. This saves RAM 1428 space since the text section of the kernel is not loaded from flash 1429 to RAM. Read-write sections, such as the data section and stack, 1430 are still copied to RAM. The XIP kernel is not compressed since 1431 it has to run directly from flash, so it will take more space to 1432 store it. The flash address used to link the kernel object files, 1433 and for storing it, is configuration dependent. Therefore, if you 1434 say Y here, you must know the proper physical address where to 1435 store the kernel image depending on your own flash memory usage. 1436 1437 Also note that the make target becomes "make xipImage" rather than 1438 "make zImage" or "make Image". The final kernel binary to put in 1439 ROM memory will be arch/arm/boot/xipImage. 1440 1441 If unsure, say N. 1442 1443config XIP_PHYS_ADDR 1444 hex "XIP Kernel Physical Location" 1445 depends on XIP_KERNEL 1446 default "0x00080000" 1447 help 1448 This is the physical address in your flash memory the kernel will 1449 be linked for and stored to. This address is dependent on your 1450 own flash usage. 1451 1452config KEXEC 1453 bool "Kexec system call (EXPERIMENTAL)" 1454 depends on EXPERIMENTAL 1455 help 1456 kexec is a system call that implements the ability to shutdown your 1457 current kernel, and to start another kernel. It is like a reboot 1458 but it is independent of the system firmware. And like a reboot 1459 you can start any kernel with it, not just Linux. 1460 1461 It is an ongoing process to be certain the hardware in a machine 1462 is properly shutdown, so do not be surprised if this code does not 1463 initially work for you. It may help to enable device hotplugging 1464 support. 1465 1466config ATAGS_PROC 1467 bool "Export atags in procfs" 1468 depends on KEXEC 1469 default y 1470 help 1471 Should the atags used to boot the kernel be exported in an "atags" 1472 file in procfs. Useful with kexec. 1473 1474endmenu 1475 1476menu "CPU Power Management" 1477 1478if ARCH_HAS_CPUFREQ 1479 1480source "drivers/cpufreq/Kconfig" 1481 1482config CPU_FREQ_SA1100 1483 bool 1484 1485config CPU_FREQ_SA1110 1486 bool 1487 1488config CPU_FREQ_INTEGRATOR 1489 tristate "CPUfreq driver for ARM Integrator CPUs" 1490 depends on ARCH_INTEGRATOR && CPU_FREQ 1491 default y 1492 help 1493 This enables the CPUfreq driver for ARM Integrator CPUs. 1494 1495 For details, take a look at <file:Documentation/cpu-freq>. 1496 1497 If in doubt, say Y. 1498 1499config CPU_FREQ_PXA 1500 bool 1501 depends on CPU_FREQ && ARCH_PXA && PXA25x 1502 default y 1503 select CPU_FREQ_DEFAULT_GOV_USERSPACE 1504 1505config CPU_FREQ_S3C64XX 1506 bool "CPUfreq support for Samsung S3C64XX CPUs" 1507 depends on CPU_FREQ && CPU_S3C6410 1508 1509config CPU_FREQ_S3C 1510 bool 1511 help 1512 Internal configuration node for common cpufreq on Samsung SoC 1513 1514config CPU_FREQ_S3C24XX 1515 bool "CPUfreq driver for Samsung S3C24XX series CPUs" 1516 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL 1517 select CPU_FREQ_S3C 1518 help 1519 This enables the CPUfreq driver for the Samsung S3C24XX family 1520 of CPUs. 1521 1522 For details, take a look at <file:Documentation/cpu-freq>. 1523 1524 If in doubt, say N. 1525 1526config CPU_FREQ_S3C24XX_PLL 1527 bool "Support CPUfreq changing of PLL frequency" 1528 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL 1529 help 1530 Compile in support for changing the PLL frequency from the 1531 S3C24XX series CPUfreq driver. The PLL takes time to settle 1532 after a frequency change, so by default it is not enabled. 1533 1534 This also means that the PLL tables for the selected CPU(s) will 1535 be built which may increase the size of the kernel image. 1536 1537config CPU_FREQ_S3C24XX_DEBUG 1538 bool "Debug CPUfreq Samsung driver core" 1539 depends on CPU_FREQ_S3C24XX 1540 help 1541 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core 1542 1543config CPU_FREQ_S3C24XX_IODEBUG 1544 bool "Debug CPUfreq Samsung driver IO timing" 1545 depends on CPU_FREQ_S3C24XX 1546 help 1547 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core 1548 1549config CPU_FREQ_S3C24XX_DEBUGFS 1550 bool "Export debugfs for CPUFreq" 1551 depends on CPU_FREQ_S3C24XX && DEBUG_FS 1552 help 1553 Export status information via debugfs. 1554 1555endif 1556 1557source "drivers/cpuidle/Kconfig" 1558 1559endmenu 1560 1561menu "Floating point emulation" 1562 1563comment "At least one emulation must be selected" 1564 1565config FPE_NWFPE 1566 bool "NWFPE math emulation" 1567 depends on !AEABI || OABI_COMPAT 1568 ---help--- 1569 Say Y to include the NWFPE floating point emulator in the kernel. 1570 This is necessary to run most binaries. Linux does not currently 1571 support floating point hardware so you need to say Y here even if 1572 your machine has an FPA or floating point co-processor podule. 1573 1574 You may say N here if you are going to load the Acorn FPEmulator 1575 early in the bootup. 1576 1577config FPE_NWFPE_XP 1578 bool "Support extended precision" 1579 depends on FPE_NWFPE 1580 help 1581 Say Y to include 80-bit support in the kernel floating-point 1582 emulator. Otherwise, only 32 and 64-bit support is compiled in. 1583 Note that gcc does not generate 80-bit operations by default, 1584 so in most cases this option only enlarges the size of the 1585 floating point emulator without any good reason. 1586 1587 You almost surely want to say N here. 1588 1589config FPE_FASTFPE 1590 bool "FastFPE math emulation (EXPERIMENTAL)" 1591 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 1592 ---help--- 1593 Say Y here to include the FAST floating point emulator in the kernel. 1594 This is an experimental much faster emulator which now also has full 1595 precision for the mantissa. It does not support any exceptions. 1596 It is very simple, and approximately 3-6 times faster than NWFPE. 1597 1598 It should be sufficient for most programs. It may be not suitable 1599 for scientific calculations, but you have to check this for yourself. 1600 If you do not feel you need a faster FP emulation you should better 1601 choose NWFPE. 1602 1603config VFP 1604 bool "VFP-format floating point maths" 1605 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 1606 help 1607 Say Y to include VFP support code in the kernel. This is needed 1608 if your hardware includes a VFP unit. 1609 1610 Please see <file:Documentation/arm/VFP/release-notes.txt> for 1611 release notes and additional status information. 1612 1613 Say N if your target does not have VFP hardware. 1614 1615config VFPv3 1616 bool 1617 depends on VFP 1618 default y if CPU_V7 1619 1620config NEON 1621 bool "Advanced SIMD (NEON) Extension support" 1622 depends on VFPv3 && CPU_V7 1623 help 1624 Say Y to include support code for NEON, the ARMv7 Advanced SIMD 1625 Extension. 1626 1627endmenu 1628 1629menu "Userspace binary formats" 1630 1631source "fs/Kconfig.binfmt" 1632 1633config ARTHUR 1634 tristate "RISC OS personality" 1635 depends on !AEABI 1636 help 1637 Say Y here to include the kernel code necessary if you want to run 1638 Acorn RISC OS/Arthur binaries under Linux. This code is still very 1639 experimental; if this sounds frightening, say N and sleep in peace. 1640 You can also say M here to compile this support as a module (which 1641 will be called arthur). 1642 1643endmenu 1644 1645menu "Power management options" 1646 1647source "kernel/power/Kconfig" 1648 1649config ARCH_SUSPEND_POSSIBLE 1650 def_bool y 1651 1652endmenu 1653 1654source "net/Kconfig" 1655 1656source "drivers/Kconfig" 1657 1658source "fs/Kconfig" 1659 1660source "arch/arm/Kconfig.debug" 1661 1662source "security/Kconfig" 1663 1664source "crypto/Kconfig" 1665 1666source "lib/Kconfig" 1667