tjh.dev / kernel
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kernel / arch / powerpc / Kconfig
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1# For a description of the syntax of this configuration file, 2# see Documentation/kbuild/kconfig-language.txt. 3# 4 5mainmenu "Linux/PowerPC Kernel Configuration" 6 7config PPC64 8 bool "64-bit kernel" 9 default n 10 help 11 This option selects whether a 32-bit or a 64-bit kernel 12 will be built. 13 14config PPC32 15 bool 16 default y if !PPC64 17 18config 64BIT 19 bool 20 default y if PPC64 21 22config PPC_MERGE 23 def_bool y 24 25config MMU 26 bool 27 default y 28 29config GENERIC_HARDIRQS 30 bool 31 default y 32 33config IRQ_PER_CPU 34 bool 35 default y 36 37config RWSEM_GENERIC_SPINLOCK 38 bool 39 40config RWSEM_XCHGADD_ALGORITHM 41 bool 42 default y 43 44config ARCH_HAS_ILOG2_U32 45 bool 46 default y 47 48config ARCH_HAS_ILOG2_U64 49 bool 50 default y if 64BIT 51 52config GENERIC_HWEIGHT 53 bool 54 default y 55 56config GENERIC_CALIBRATE_DELAY 57 bool 58 default y 59 60config GENERIC_FIND_NEXT_BIT 61 bool 62 default y 63 64config PPC 65 bool 66 default y 67 68config EARLY_PRINTK 69 bool 70 default y 71 72config COMPAT 73 bool 74 default y if PPC64 75 76config SYSVIPC_COMPAT 77 bool 78 depends on COMPAT && SYSVIPC 79 default y 80 81# All PPC32s use generic nvram driver through ppc_md 82config GENERIC_NVRAM 83 bool 84 default y if PPC32 85 86config SCHED_NO_NO_OMIT_FRAME_POINTER 87 bool 88 default y 89 90config ARCH_MAY_HAVE_PC_FDC 91 bool 92 default y 93 94config PPC_OF 95 def_bool y 96 97config PPC_UDBG_16550 98 bool 99 default n 100 101config GENERIC_TBSYNC 102 bool 103 default y if PPC32 && SMP 104 default n 105 106config AUDIT_ARCH 107 bool 108 default y 109 110config GENERIC_BUG 111 bool 112 default y 113 depends on BUG 114 115config DEFAULT_UIMAGE 116 bool 117 help 118 Used to allow a board to specify it wants a uImage built by default 119 default n 120 121menu "Processor support" 122choice 123 prompt "Processor Type" 124 depends on PPC32 125 default 6xx 126 127config CLASSIC32 128 bool "52xx/6xx/7xx/74xx" 129 select PPC_FPU 130 select 6xx 131 help 132 There are four families of PowerPC chips supported. The more common 133 types (601, 603, 604, 740, 750, 7400), the Motorola embedded 134 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC 135 embedded versions (403 and 405) and the high end 64 bit Power 136 processors (POWER 3, POWER4, and IBM PPC970 also known as G5). 137 138 This option is the catch-all for 6xx types, including some of the 139 embedded versions. Unless there is see an option for the specific 140 chip family you are using, you want this option. 141 142 You do not want this if you are building a kernel for a 64 bit 143 IBM RS/6000 or an Apple G5, choose 6xx. 144 145 If unsure, select this option 146 147 Note that the kernel runs in 32-bit mode even on 64-bit chips. 148 149config PPC_82xx 150 bool "Freescale 82xx" 151 select 6xx 152 select PPC_FPU 153 154config PPC_83xx 155 bool "Freescale 83xx" 156 select 6xx 157 select FSL_SOC 158 select 83xx 159 select PPC_FPU 160 161config PPC_85xx 162 bool "Freescale 85xx" 163 select E500 164 select FSL_SOC 165 select 85xx 166 167config PPC_86xx 168 bool "Freescale 86xx" 169 select 6xx 170 select FSL_SOC 171 select PPC_FPU 172 select ALTIVEC 173 help 174 The Freescale E600 SoCs have 74xx cores. 175 176config PPC_8xx 177 bool "Freescale 8xx" 178 select FSL_SOC 179 select 8xx 180 181config 40x 182 bool "AMCC 40x" 183 select PPC_DCR_NATIVE 184 185config 44x 186 bool "AMCC 44x" 187 select PPC_DCR_NATIVE 188 189 190config E200 191 bool "Freescale e200" 192 193endchoice 194 195config POWER4_ONLY 196 bool "Optimize for POWER4" 197 depends on PPC64 198 default n 199 ---help--- 200 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors. 201 The resulting binary will not work on POWER3 or RS64 processors 202 when compiled with binutils 2.15 or later. 203 204config POWER3 205 bool 206 depends on PPC64 207 default y if !POWER4_ONLY 208 209config POWER4 210 depends on PPC64 211 def_bool y 212 213config 6xx 214 bool 215 216# this is temp to handle compat with arch=ppc 217config 8xx 218 bool 219 220# this is temp to handle compat with arch=ppc 221config 83xx 222 bool 223 224# this is temp to handle compat with arch=ppc 225config 85xx 226 bool 227 228config E500 229 bool 230 231config PPC_FPU 232 bool 233 default y if PPC64 234 235config PPC_DCR_NATIVE 236 bool 237 default n 238 239config PPC_DCR_MMIO 240 bool 241 default n 242 243config PPC_DCR 244 bool 245 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 246 default y 247 248config PPC_OF_PLATFORM_PCI 249 bool 250 depends on PPC64 # not supported on 32 bits yet 251 default n 252 253config BOOKE 254 bool 255 depends on E200 || E500 256 default y 257 258config FSL_BOOKE 259 bool 260 depends on E200 || E500 261 default y 262 263config PTE_64BIT 264 bool 265 depends on 44x || E500 266 default y if 44x 267 default y if E500 && PHYS_64BIT 268 269config PHYS_64BIT 270 bool 'Large physical address support' if E500 271 depends on 44x || E500 272 select RESOURCES_64BIT 273 default y if 44x 274 ---help--- 275 This option enables kernel support for larger than 32-bit physical 276 addresses. This features is not be available on all e500 cores. 277 278 If in doubt, say N here. 279 280config ALTIVEC 281 bool "AltiVec Support" 282 depends on CLASSIC32 || POWER4 283 ---help--- 284 This option enables kernel support for the Altivec extensions to the 285 PowerPC processor. The kernel currently supports saving and restoring 286 altivec registers, and turning on the 'altivec enable' bit so user 287 processes can execute altivec instructions. 288 289 This option is only usefully if you have a processor that supports 290 altivec (G4, otherwise known as 74xx series), but does not have 291 any affect on a non-altivec cpu (it does, however add code to the 292 kernel). 293 294 If in doubt, say Y here. 295 296config SPE 297 bool "SPE Support" 298 depends on E200 || E500 299 default y 300 ---help--- 301 This option enables kernel support for the Signal Processing 302 Extensions (SPE) to the PowerPC processor. The kernel currently 303 supports saving and restoring SPE registers, and turning on the 304 'spe enable' bit so user processes can execute SPE instructions. 305 306 This option is only useful if you have a processor that supports 307 SPE (e500, otherwise known as 85xx series), but does not have any 308 effect on a non-spe cpu (it does, however add code to the kernel). 309 310 If in doubt, say Y here. 311 312config PPC_STD_MMU 313 bool 314 depends on 6xx || POWER3 || POWER4 || PPC64 315 default y 316 317config PPC_STD_MMU_32 318 def_bool y 319 depends on PPC_STD_MMU && PPC32 320 321config VIRT_CPU_ACCOUNTING 322 bool "Deterministic task and CPU time accounting" 323 depends on PPC64 324 default y 325 help 326 Select this option to enable more accurate task and CPU time 327 accounting. This is done by reading a CPU counter on each 328 kernel entry and exit and on transitions within the kernel 329 between system, softirq and hardirq state, so there is a 330 small performance impact. This also enables accounting of 331 stolen time on logically-partitioned systems running on 332 IBM POWER5-based machines. 333 334 If in doubt, say Y here. 335 336config SMP 337 depends on PPC_STD_MMU 338 bool "Symmetric multi-processing support" 339 ---help--- 340 This enables support for systems with more than one CPU. If you have 341 a system with only one CPU, say N. If you have a system with more 342 than one CPU, say Y. Note that the kernel does not currently 343 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors 344 since they have inadequate hardware support for multiprocessor 345 operation. 346 347 If you say N here, the kernel will run on single and multiprocessor 348 machines, but will use only one CPU of a multiprocessor machine. If 349 you say Y here, the kernel will run on single-processor machines. 350 On a single-processor machine, the kernel will run faster if you say 351 N here. 352 353 If you don't know what to do here, say N. 354 355config NR_CPUS 356 int "Maximum number of CPUs (2-128)" 357 range 2 128 358 depends on SMP 359 default "32" if PPC64 360 default "4" 361 362config NOT_COHERENT_CACHE 363 bool 364 depends on 4xx || 8xx || E200 365 default y 366endmenu 367 368source "init/Kconfig" 369 370menu "Platform support" 371 depends on PPC64 || CLASSIC32 372 373choice 374 prompt "Machine type" 375 default PPC_MULTIPLATFORM 376 377config PPC_MULTIPLATFORM 378 bool "Generic desktop/server/laptop" 379 help 380 Select this option if configuring for an IBM pSeries or 381 RS/6000 machine, an Apple machine, or a PReP, CHRP, 382 Maple or Cell-based machine. 383 384config EMBEDDED6xx 385 bool "Embedded 6xx/7xx/7xxx-based board" 386 depends on PPC32 && (BROKEN||BROKEN_ON_SMP) 387 388config APUS 389 bool "Amiga-APUS" 390 depends on PPC32 && BROKEN 391 help 392 Select APUS if configuring for a PowerUP Amiga. 393 More information is available at: 394 <http://linux-apus.sourceforge.net/>. 395endchoice 396 397config QUICC_ENGINE 398 bool 399 depends on PPC_MPC836x || PPC_MPC832x 400 default y 401 help 402 The QUICC Engine (QE) is a new generation of communications 403 coprocessors on Freescale embedded CPUs (akin to CPM in older chips). 404 Selecting this option means that you wish to build a kernel 405 for a machine with a QE coprocessor. 406 407config PPC_PSERIES 408 depends on PPC_MULTIPLATFORM && PPC64 409 bool "IBM pSeries & new (POWER5-based) iSeries" 410 select MPIC 411 select PPC_I8259 412 select PPC_RTAS 413 select RTAS_ERROR_LOGGING 414 select PPC_UDBG_16550 415 select PPC_NATIVE 416 default y 417 418config PPC_ISERIES 419 bool "IBM Legacy iSeries" 420 depends on PPC_MULTIPLATFORM && PPC64 421 select PPC_INDIRECT_IO 422 423config PPC_CHRP 424 bool "Common Hardware Reference Platform (CHRP) based machines" 425 depends on PPC_MULTIPLATFORM && PPC32 426 select MPIC 427 select PPC_I8259 428 select PPC_INDIRECT_PCI 429 select PPC_RTAS 430 select PPC_MPC106 431 select PPC_UDBG_16550 432 select PPC_NATIVE 433 default y 434 435config PPC_MPC52xx 436 bool 437 default n 438 439config PPC_MPC5200 440 bool 441 select PPC_MPC52xx 442 default n 443 444config PPC_MPC5200_BUGFIX 445 bool "MPC5200 (L25R) bugfix support" 446 depends on PPC_MPC5200 447 default n 448 help 449 Enable workarounds for original MPC5200 errata. This is not required 450 for MPC5200B based boards. 451 452 It is safe to say 'Y' here 453 454config PPC_EFIKA 455 bool "bPlan Efika 5k2. MPC5200B based computer" 456 depends on PPC_MULTIPLATFORM && PPC32 457 select PPC_RTAS 458 select RTAS_PROC 459 select PPC_MPC52xx 460 select PPC_NATIVE 461 default n 462 463config PPC_LITE5200 464 bool "Freescale Lite5200 Eval Board" 465 depends on PPC_MULTIPLATFORM && PPC32 466 select PPC_MPC5200 467 default n 468 469config PPC_PMAC 470 bool "Apple PowerMac based machines" 471 depends on PPC_MULTIPLATFORM 472 select MPIC 473 select PPC_INDIRECT_PCI if PPC32 474 select PPC_MPC106 if PPC32 475 select PPC_NATIVE 476 default y 477 478config PPC_PMAC64 479 bool 480 depends on PPC_PMAC && POWER4 481 select MPIC 482 select U3_DART 483 select MPIC_BROKEN_U3 484 select GENERIC_TBSYNC 485 select PPC_970_NAP 486 default y 487 488config PPC_PREP 489 bool "PowerPC Reference Platform (PReP) based machines" 490 depends on PPC_MULTIPLATFORM && PPC32 && BROKEN 491 select MPIC 492 select PPC_I8259 493 select PPC_INDIRECT_PCI 494 select PPC_UDBG_16550 495 select PPC_NATIVE 496 default n 497 498config PPC_MAPLE 499 depends on PPC_MULTIPLATFORM && PPC64 500 bool "Maple 970FX Evaluation Board" 501 select MPIC 502 select U3_DART 503 select MPIC_BROKEN_U3 504 select GENERIC_TBSYNC 505 select PPC_UDBG_16550 506 select PPC_970_NAP 507 select PPC_NATIVE 508 select PPC_RTAS 509 select MMIO_NVRAM 510 select ATA_NONSTANDARD if ATA 511 default n 512 help 513 This option enables support for the Maple 970FX Evaluation Board. 514 For more information, refer to <http://www.970eval.com> 515 516config PPC_PASEMI 517 depends on PPC_MULTIPLATFORM && PPC64 518 bool "PA Semi SoC-based platforms" 519 default n 520 select MPIC 521 select PPC_UDBG_16550 522 select GENERIC_TBSYNC 523 select PPC_NATIVE 524 help 525 This option enables support for PA Semi's PWRficient line 526 of SoC processors, including PA6T-1682M 527 528config PPC_CELL 529 bool 530 default n 531 532config PPC_CELL_NATIVE 533 bool 534 select PPC_CELL 535 select PPC_DCR_MMIO 536 select PPC_OF_PLATFORM_PCI 537 select PPC_INDIRECT_IO 538 select PPC_NATIVE 539 select MPIC 540 default n 541 542config PPC_IBM_CELL_BLADE 543 bool "IBM Cell Blade" 544 depends on PPC_MULTIPLATFORM && PPC64 545 select PPC_CELL_NATIVE 546 select PPC_RTAS 547 select MMIO_NVRAM 548 select PPC_UDBG_16550 549 select UDBG_RTAS_CONSOLE 550 551config PPC_PS3 552 bool "Sony PS3 (incomplete)" 553 depends on PPC_MULTIPLATFORM && PPC64 554 select PPC_CELL 555 select USB_ARCH_HAS_OHCI 556 select USB_OHCI_LITTLE_ENDIAN 557 select USB_OHCI_BIG_ENDIAN_MMIO 558 select USB_ARCH_HAS_EHCI 559 select USB_EHCI_BIG_ENDIAN_MMIO 560 help 561 This option enables support for the Sony PS3 game console 562 and other platforms using the PS3 hypervisor. 563 Support for this platform is not yet complete, so 564 enabling this will not result in a bootable kernel on a 565 PS3 system. 566 567config PPC_CELLEB 568 bool "Toshiba's Cell Reference Set 'Celleb' Architecture" 569 depends on PPC_MULTIPLATFORM && PPC64 570 select PPC_CELL 571 select PPC_OF_PLATFORM_PCI 572 select HAS_TXX9_SERIAL 573 select PPC_UDBG_BEAT 574 select USB_OHCI_BIG_ENDIAN_MMIO 575 select USB_EHCI_BIG_ENDIAN_MMIO 576 577config PPC_NATIVE 578 bool 579 depends on PPC_MULTIPLATFORM 580 help 581 Support for running natively on the hardware, i.e. without 582 a hypervisor. This option is not user-selectable but should 583 be selected by all platforms that need it. 584 585config UDBG_RTAS_CONSOLE 586 bool "RTAS based debug console" 587 depends on PPC_RTAS 588 default n 589 590config PPC_UDBG_BEAT 591 bool "BEAT based debug console" 592 depends on PPC_CELLEB 593 default n 594 595config XICS 596 depends on PPC_PSERIES 597 bool 598 default y 599 600config U3_DART 601 bool 602 depends on PPC_MULTIPLATFORM && PPC64 603 default n 604 605config PPC_RTAS 606 bool 607 default n 608 609config RTAS_ERROR_LOGGING 610 bool 611 depends on PPC_RTAS 612 default n 613 614config RTAS_PROC 615 bool "Proc interface to RTAS" 616 depends on PPC_RTAS 617 default y 618 619config RTAS_FLASH 620 tristate "Firmware flash interface" 621 depends on PPC64 && RTAS_PROC 622 623config PPC_PMI 624 tristate "Support for PMI" 625 depends PPC_IBM_CELL_BLADE 626 help 627 PMI (Platform Management Interrupt) is a way to 628 communicate with the BMC (Baseboard Mangement Controller). 629 It is used in some IBM Cell blades. 630 default m 631 632config MMIO_NVRAM 633 bool 634 default n 635 636config MPIC_BROKEN_U3 637 bool 638 depends on PPC_MAPLE 639 default y 640 641config IBMVIO 642 depends on PPC_PSERIES || PPC_ISERIES 643 bool 644 default y 645 646config IBMEBUS 647 depends on PPC_PSERIES 648 bool "Support for GX bus based adapters" 649 help 650 Bus device driver for GX bus based adapters. 651 652config PPC_MPC106 653 bool 654 default n 655 656config PPC_970_NAP 657 bool 658 default n 659 660config PPC_INDIRECT_IO 661 bool 662 select GENERIC_IOMAP 663 default n 664 665config GENERIC_IOMAP 666 bool 667 default n 668 669source "drivers/cpufreq/Kconfig" 670 671config CPU_FREQ_PMAC 672 bool "Support for Apple PowerBooks" 673 depends on CPU_FREQ && ADB_PMU && PPC32 674 select CPU_FREQ_TABLE 675 help 676 This adds support for frequency switching on Apple PowerBooks, 677 this currently includes some models of iBook & Titanium 678 PowerBook. 679 680config CPU_FREQ_PMAC64 681 bool "Support for some Apple G5s" 682 depends on CPU_FREQ && PPC64 683 select CPU_FREQ_TABLE 684 help 685 This adds support for frequency switching on Apple iMac G5, 686 and some of the more recent desktop G5 machines as well. 687 688config PPC601_SYNC_FIX 689 bool "Workarounds for PPC601 bugs" 690 depends on 6xx && (PPC_PREP || PPC_PMAC) 691 help 692 Some versions of the PPC601 (the first PowerPC chip) have bugs which 693 mean that extra synchronization instructions are required near 694 certain instructions, typically those that make major changes to the 695 CPU state. These extra instructions reduce performance slightly. 696 If you say N here, these extra instructions will not be included, 697 resulting in a kernel which will run faster but may not run at all 698 on some systems with the PPC601 chip. 699 700 If in doubt, say Y here. 701 702config TAU 703 bool "On-chip CPU temperature sensor support" 704 depends on 6xx 705 help 706 G3 and G4 processors have an on-chip temperature sensor called the 707 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die 708 temperature within 2-4 degrees Celsius. This option shows the current 709 on-die temperature in /proc/cpuinfo if the cpu supports it. 710 711 Unfortunately, on some chip revisions, this sensor is very inaccurate 712 and in many cases, does not work at all, so don't assume the cpu 713 temp is actually what /proc/cpuinfo says it is. 714 715config TAU_INT 716 bool "Interrupt driven TAU driver (DANGEROUS)" 717 depends on TAU 718 ---help--- 719 The TAU supports an interrupt driven mode which causes an interrupt 720 whenever the temperature goes out of range. This is the fastest way 721 to get notified the temp has exceeded a range. With this option off, 722 a timer is used to re-check the temperature periodically. 723 724 However, on some cpus it appears that the TAU interrupt hardware 725 is buggy and can cause a situation which would lead unexplained hard 726 lockups. 727 728 Unless you are extending the TAU driver, or enjoy kernel/hardware 729 debugging, leave this option off. 730 731config TAU_AVERAGE 732 bool "Average high and low temp" 733 depends on TAU 734 ---help--- 735 The TAU hardware can compare the temperature to an upper and lower 736 bound. The default behavior is to show both the upper and lower 737 bound in /proc/cpuinfo. If the range is large, the temperature is 738 either changing a lot, or the TAU hardware is broken (likely on some 739 G4's). If the range is small (around 4 degrees), the temperature is 740 relatively stable. If you say Y here, a single temperature value, 741 halfway between the upper and lower bounds, will be reported in 742 /proc/cpuinfo. 743 744 If in doubt, say N here. 745 746endmenu 747 748source arch/powerpc/platforms/embedded6xx/Kconfig 749source arch/powerpc/platforms/4xx/Kconfig 750source arch/powerpc/platforms/82xx/Kconfig 751source arch/powerpc/platforms/83xx/Kconfig 752source arch/powerpc/platforms/85xx/Kconfig 753source arch/powerpc/platforms/86xx/Kconfig 754source arch/powerpc/platforms/8xx/Kconfig 755source arch/powerpc/platforms/cell/Kconfig 756source arch/powerpc/platforms/ps3/Kconfig 757source arch/powerpc/platforms/pasemi/Kconfig 758 759menu "Kernel options" 760 761config HIGHMEM 762 bool "High memory support" 763 depends on PPC32 764 765source kernel/Kconfig.hz 766source kernel/Kconfig.preempt 767source "fs/Kconfig.binfmt" 768 769# We optimistically allocate largepages from the VM, so make the limit 770# large enough (16MB). This badly named config option is actually 771# max order + 1 772config FORCE_MAX_ZONEORDER 773 int 774 depends on PPC64 775 default "9" if PPC_64K_PAGES 776 default "13" 777 778config MATH_EMULATION 779 bool "Math emulation" 780 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 781 ---help--- 782 Some PowerPC chips designed for embedded applications do not have 783 a floating-point unit and therefore do not implement the 784 floating-point instructions in the PowerPC instruction set. If you 785 say Y here, the kernel will include code to emulate a floating-point 786 unit, which will allow programs that use floating-point 787 instructions to run. 788 789config IOMMU_VMERGE 790 bool "Enable IOMMU virtual merging (EXPERIMENTAL)" 791 depends on EXPERIMENTAL && PPC64 792 default n 793 help 794 Cause IO segments sent to a device for DMA to be merged virtually 795 by the IOMMU when they happen to have been allocated contiguously. 796 This doesn't add pressure to the IOMMU allocator. However, some 797 drivers don't support getting large merged segments coming back 798 from *_map_sg(). Say Y if you know the drivers you are using are 799 properly handling this case. 800 801config HOTPLUG_CPU 802 bool "Support for enabling/disabling CPUs" 803 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) 804 ---help--- 805 Say Y here to be able to disable and re-enable individual 806 CPUs at runtime on SMP machines. 807 808 Say N if you are unsure. 809 810config ARCH_ENABLE_MEMORY_HOTPLUG 811 def_bool y 812 813config KEXEC 814 bool "kexec system call (EXPERIMENTAL)" 815 depends on PPC_MULTIPLATFORM && EXPERIMENTAL 816 help 817 kexec is a system call that implements the ability to shutdown your 818 current kernel, and to start another kernel. It is like a reboot 819 but it is independent of the system firmware. And like a reboot 820 you can start any kernel with it, not just Linux. 821 822 The name comes from the similarity to the exec system call. 823 824 It is an ongoing process to be certain the hardware in a machine 825 is properly shutdown, so do not be surprised if this code does not 826 initially work for you. It may help to enable device hotplugging 827 support. As of this writing the exact hardware interface is 828 strongly in flux, so no good recommendation can be made. 829 830config CRASH_DUMP 831 bool "Build a kdump crash kernel (EXPERIMENTAL)" 832 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL 833 help 834 Build a kernel suitable for use as a kdump capture kernel. 835 The kernel will be linked at a different address than normal, and 836 so can only be used for Kdump. 837 838 Don't change this unless you know what you are doing. 839 840config EMBEDDEDBOOT 841 bool 842 depends on 8xx || 8260 843 default y 844 845config PC_KEYBOARD 846 bool "PC PS/2 style Keyboard" 847 depends on 4xx || CPM2 848 849config PPCBUG_NVRAM 850 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC 851 default y if PPC_PREP 852 853config IRQ_ALL_CPUS 854 bool "Distribute interrupts on all CPUs by default" 855 depends on SMP && !MV64360 856 help 857 This option gives the kernel permission to distribute IRQs across 858 multiple CPUs. Saying N here will route all IRQs to the first 859 CPU. Generally saying Y is safe, although some problems have been 860 reported with SMP Power Macintoshes with this option enabled. 861 862source "arch/powerpc/platforms/pseries/Kconfig" 863 864config NUMA 865 bool "NUMA support" 866 depends on PPC64 867 default y if SMP && PPC_PSERIES 868 869config NODES_SHIFT 870 int 871 default "4" 872 depends on NEED_MULTIPLE_NODES 873 874config ARCH_SELECT_MEMORY_MODEL 875 def_bool y 876 depends on PPC64 877 878config ARCH_FLATMEM_ENABLE 879 def_bool y 880 depends on (PPC64 && !NUMA) || PPC32 881 882config ARCH_SPARSEMEM_ENABLE 883 def_bool y 884 depends on PPC64 885 886config ARCH_SPARSEMEM_DEFAULT 887 def_bool y 888 depends on (SMP && PPC_PSERIES) || PPC_PS3 889 890config ARCH_POPULATES_NODE_MAP 891 def_bool y 892 893source "mm/Kconfig" 894 895config ARCH_MEMORY_PROBE 896 def_bool y 897 depends on MEMORY_HOTPLUG 898 899# Some NUMA nodes have memory ranges that span 900# other nodes. Even though a pfn is valid and 901# between a node's start and end pfns, it may not 902# reside on that node. See memmap_init_zone() 903# for details. 904config NODES_SPAN_OTHER_NODES 905 def_bool y 906 depends on NEED_MULTIPLE_NODES 907 908config PPC_64K_PAGES 909 bool "64k page size" 910 depends on PPC64 911 help 912 This option changes the kernel logical page size to 64k. On machines 913 without processor support for 64k pages, the kernel will simulate 914 them by loading each individual 4k page on demand transparently, 915 while on hardware with such support, it will be used to map 916 normal application pages. 917 918config SCHED_SMT 919 bool "SMT (Hyperthreading) scheduler support" 920 depends on PPC64 && SMP 921 help 922 SMT scheduler support improves the CPU scheduler's decision making 923 when dealing with POWER5 cpus at a cost of slightly increased 924 overhead in some places. If unsure say N here. 925 926config PROC_DEVICETREE 927 bool "Support for device tree in /proc" 928 depends on PROC_FS 929 help 930 This option adds a device-tree directory under /proc which contains 931 an image of the device tree that the kernel copies from Open 932 Firmware or other boot firmware. If unsure, say Y here. 933 934source "arch/powerpc/platforms/prep/Kconfig" 935 936config CMDLINE_BOOL 937 bool "Default bootloader kernel arguments" 938 939config CMDLINE 940 string "Initial kernel command string" 941 depends on CMDLINE_BOOL 942 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 943 help 944 On some platforms, there is currently no way for the boot loader to 945 pass arguments to the kernel. For these platforms, you can supply 946 some command-line options at build time by entering them here. In 947 most cases you will need to specify the root device here. 948 949if !44x || BROKEN 950source kernel/power/Kconfig 951endif 952 953config SECCOMP 954 bool "Enable seccomp to safely compute untrusted bytecode" 955 depends on PROC_FS 956 default y 957 help 958 This kernel feature is useful for number crunching applications 959 that may need to compute untrusted bytecode during their 960 execution. By using pipes or other transports made available to 961 the process as file descriptors supporting the read/write 962 syscalls, it's possible to isolate those applications in 963 their own address space using seccomp. Once seccomp is 964 enabled via /proc/<pid>/seccomp, it cannot be disabled 965 and the task is only allowed to execute a few safe syscalls 966 defined by each seccomp mode. 967 968 If unsure, say Y. Only embedded should say N here. 969 970endmenu 971 972config ISA_DMA_API 973 bool 974 default y 975 976menu "Bus options" 977 978config ISA 979 bool "Support for ISA-bus hardware" 980 depends on PPC_PREP || PPC_CHRP 981 select PPC_I8259 982 help 983 Find out whether you have ISA slots on your motherboard. ISA is the 984 name of a bus system, i.e. the way the CPU talks to the other stuff 985 inside your box. If you have an Apple machine, say N here; if you 986 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 987 you have an embedded board, consult your board documentation. 988 989config ZONE_DMA 990 bool 991 default y 992 993config GENERIC_ISA_DMA 994 bool 995 depends on PPC64 || POWER4 || 6xx && !CPM2 996 default y 997 998config MPIC 999 bool 1000 default n 1001 1002config MPIC_WEIRD 1003 bool 1004 default n 1005 1006config PPC_I8259 1007 bool 1008 default n 1009 1010config PPC_INDIRECT_PCI 1011 bool 1012 depends on PCI 1013 default y if 40x || 44x 1014 default n 1015 1016config EISA 1017 bool 1018 1019config SBUS 1020 bool 1021 1022config FSL_SOC 1023 bool 1024 1025# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 1026config MCA 1027 bool 1028 1029config PCI 1030 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \ 1031 || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) || MPC7448HPC2 || PPC_PS3 1032 default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \ 1033 && !PPC_85xx && !PPC_86xx 1034 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS 1035 default PCI_QSPAN if !4xx && !CPM2 && 8xx 1036 help 1037 Find out whether your system includes a PCI bus. PCI is the name of 1038 a bus system, i.e. the way the CPU talks to the other stuff inside 1039 your box. If you say Y here, the kernel will include drivers and 1040 infrastructure code to support PCI bus devices. 1041 1042config PCI_DOMAINS 1043 bool 1044 default PCI 1045 1046config PCI_QSPAN 1047 bool "QSpan PCI" 1048 depends on !4xx && !CPM2 && 8xx 1049 select PPC_I8259 1050 help 1051 Say Y here if you have a system based on a Motorola 8xx-series 1052 embedded processor with a QSPAN PCI interface, otherwise say N. 1053 1054config PCI_8260 1055 bool 1056 depends on PCI && 8260 1057 select PPC_INDIRECT_PCI 1058 default y 1059 1060config 8260_PCI9 1061 bool "Enable workaround for MPC826x erratum PCI 9" 1062 depends on PCI_8260 && !ADS8272 1063 default y 1064 1065choice 1066 prompt "IDMA channel for PCI 9 workaround" 1067 depends on 8260_PCI9 1068 1069config 8260_PCI9_IDMA1 1070 bool "IDMA1" 1071 1072config 8260_PCI9_IDMA2 1073 bool "IDMA2" 1074 1075config 8260_PCI9_IDMA3 1076 bool "IDMA3" 1077 1078config 8260_PCI9_IDMA4 1079 bool "IDMA4" 1080 1081endchoice 1082 1083source "drivers/pci/pcie/Kconfig" 1084 1085source "drivers/pci/Kconfig" 1086 1087source "drivers/pcmcia/Kconfig" 1088 1089source "drivers/pci/hotplug/Kconfig" 1090 1091endmenu 1092 1093menu "Advanced setup" 1094 depends on PPC32 1095 1096config ADVANCED_OPTIONS 1097 bool "Prompt for advanced kernel configuration options" 1098 help 1099 This option will enable prompting for a variety of advanced kernel 1100 configuration options. These options can cause the kernel to not 1101 work if they are set incorrectly, but can be used to optimize certain 1102 aspects of kernel memory management. 1103 1104 Unless you know what you are doing, say N here. 1105 1106comment "Default settings for advanced configuration options are used" 1107 depends on !ADVANCED_OPTIONS 1108 1109config HIGHMEM_START_BOOL 1110 bool "Set high memory pool address" 1111 depends on ADVANCED_OPTIONS && HIGHMEM 1112 help 1113 This option allows you to set the base address of the kernel virtual 1114 area used to map high memory pages. This can be useful in 1115 optimizing the layout of kernel virtual memory. 1116 1117 Say N here unless you know what you are doing. 1118 1119config HIGHMEM_START 1120 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL 1121 default "0xfe000000" 1122 1123config LOWMEM_SIZE_BOOL 1124 bool "Set maximum low memory" 1125 depends on ADVANCED_OPTIONS 1126 help 1127 This option allows you to set the maximum amount of memory which 1128 will be used as "low memory", that is, memory which the kernel can 1129 access directly, without having to set up a kernel virtual mapping. 1130 This can be useful in optimizing the layout of kernel virtual 1131 memory. 1132 1133 Say N here unless you know what you are doing. 1134 1135config LOWMEM_SIZE 1136 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1137 default "0x30000000" 1138 1139config KERNEL_START_BOOL 1140 bool "Set custom kernel base address" 1141 depends on ADVANCED_OPTIONS 1142 help 1143 This option allows you to set the kernel virtual address at which 1144 the kernel will map low memory (the kernel image will be linked at 1145 this address). This can be useful in optimizing the virtual memory 1146 layout of the system. 1147 1148 Say N here unless you know what you are doing. 1149 1150config KERNEL_START 1151 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1152 default "0xc0000000" 1153 1154config TASK_SIZE_BOOL 1155 bool "Set custom user task size" 1156 depends on ADVANCED_OPTIONS 1157 help 1158 This option allows you to set the amount of virtual address space 1159 allocated to user tasks. This can be useful in optimizing the 1160 virtual memory layout of the system. 1161 1162 Say N here unless you know what you are doing. 1163 1164config TASK_SIZE 1165 hex "Size of user task space" if TASK_SIZE_BOOL 1166 default "0x80000000" 1167 1168config CONSISTENT_START_BOOL 1169 bool "Set custom consistent memory pool address" 1170 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1171 help 1172 This option allows you to set the base virtual address 1173 of the consistent memory pool. This pool of virtual 1174 memory is used to make consistent memory allocations. 1175 1176config CONSISTENT_START 1177 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL 1178 default "0xff100000" if NOT_COHERENT_CACHE 1179 1180config CONSISTENT_SIZE_BOOL 1181 bool "Set custom consistent memory pool size" 1182 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1183 help 1184 This option allows you to set the size of the 1185 consistent memory pool. This pool of virtual memory 1186 is used to make consistent memory allocations. 1187 1188config CONSISTENT_SIZE 1189 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1190 default "0x00200000" if NOT_COHERENT_CACHE 1191 1192config BOOT_LOAD_BOOL 1193 bool "Set the boot link/load address" 1194 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM 1195 help 1196 This option allows you to set the initial load address of the zImage 1197 or zImage.initrd file. This can be useful if you are on a board 1198 which has a small amount of memory. 1199 1200 Say N here unless you know what you are doing. 1201 1202config BOOT_LOAD 1203 hex "Link/load address for booting" if BOOT_LOAD_BOOL 1204 default "0x00400000" if 40x || 8xx || 8260 1205 default "0x01000000" if 44x 1206 default "0x00800000" 1207 1208config PIN_TLB 1209 bool "Pinned Kernel TLBs (860 ONLY)" 1210 depends on ADVANCED_OPTIONS && 8xx 1211endmenu 1212 1213if PPC64 1214config KERNEL_START 1215 hex 1216 default "0xc000000000000000" 1217endif 1218 1219source "net/Kconfig" 1220 1221source "drivers/Kconfig" 1222 1223source "fs/Kconfig" 1224 1225# XXX source "arch/ppc/8xx_io/Kconfig" 1226 1227# XXX source "arch/ppc/8260_io/Kconfig" 1228 1229source "arch/powerpc/sysdev/qe_lib/Kconfig" 1230 1231source "arch/powerpc/platforms/iseries/Kconfig" 1232 1233source "lib/Kconfig" 1234 1235menu "Instrumentation Support" 1236 depends on EXPERIMENTAL 1237 1238source "arch/powerpc/oprofile/Kconfig" 1239 1240config KPROBES 1241 bool "Kprobes (EXPERIMENTAL)" 1242 depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES 1243 help 1244 Kprobes allows you to trap at almost any kernel address and 1245 execute a callback function. register_kprobe() establishes 1246 a probepoint and specifies the callback. Kprobes is useful 1247 for kernel debugging, non-intrusive instrumentation and testing. 1248 If in doubt, say "N". 1249endmenu 1250 1251source "arch/powerpc/Kconfig.debug" 1252 1253source "security/Kconfig" 1254 1255config KEYS_COMPAT 1256 bool 1257 depends on COMPAT && KEYS 1258 default y 1259 1260source "crypto/Kconfig"