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 !PPC_PSERIES || PCI 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 435source "arch/powerpc/platforms/52xx/Kconfig" 436source "arch/powerpc/platforms/powermac/Kconfig" 437 438config PPC_PREP 439 bool "PowerPC Reference Platform (PReP) based machines" 440 depends on PPC_MULTIPLATFORM && PPC32 && BROKEN 441 select MPIC 442 select PPC_I8259 443 select PPC_INDIRECT_PCI 444 select PPC_UDBG_16550 445 select PPC_NATIVE 446 default n 447 448config PPC_MAPLE 449 depends on PPC_MULTIPLATFORM && PPC64 450 bool "Maple 970FX Evaluation Board" 451 select MPIC 452 select U3_DART 453 select MPIC_BROKEN_U3 454 select GENERIC_TBSYNC 455 select PPC_UDBG_16550 456 select PPC_970_NAP 457 select PPC_NATIVE 458 select PPC_RTAS 459 select MMIO_NVRAM 460 select ATA_NONSTANDARD if ATA 461 default n 462 help 463 This option enables support for the Maple 970FX Evaluation Board. 464 For more information, refer to <http://www.970eval.com> 465 466config PPC_PASEMI 467 depends on PPC_MULTIPLATFORM && PPC64 468 bool "PA Semi SoC-based platforms" 469 default n 470 select MPIC 471 select PPC_UDBG_16550 472 select GENERIC_TBSYNC 473 select PPC_NATIVE 474 help 475 This option enables support for PA Semi's PWRficient line 476 of SoC processors, including PA6T-1682M 477 478source arch/powerpc/platforms/celleb/Kconfig 479source arch/powerpc/platforms/ps3/Kconfig 480source arch/powerpc/platforms/cell/Kconfig 481 482config PPC_NATIVE 483 bool 484 depends on PPC_MULTIPLATFORM 485 help 486 Support for running natively on the hardware, i.e. without 487 a hypervisor. This option is not user-selectable but should 488 be selected by all platforms that need it. 489 490config UDBG_RTAS_CONSOLE 491 bool "RTAS based debug console" 492 depends on PPC_RTAS 493 default n 494 495config PPC_UDBG_BEAT 496 bool "BEAT based debug console" 497 depends on PPC_CELLEB 498 default n 499 500config XICS 501 depends on PPC_PSERIES 502 bool 503 default y 504 505config U3_DART 506 bool 507 depends on PPC_MULTIPLATFORM && PPC64 508 default n 509 510config PPC_RTAS 511 bool 512 default n 513 514config RTAS_ERROR_LOGGING 515 bool 516 depends on PPC_RTAS 517 default n 518 519config RTAS_PROC 520 bool "Proc interface to RTAS" 521 depends on PPC_RTAS 522 default y 523 524config RTAS_FLASH 525 tristate "Firmware flash interface" 526 depends on PPC64 && RTAS_PROC 527 528config PPC_PMI 529 tristate "Support for PMI" 530 depends PPC_IBM_CELL_BLADE 531 help 532 PMI (Platform Management Interrupt) is a way to 533 communicate with the BMC (Baseboard Mangement Controller). 534 It is used in some IBM Cell blades. 535 default m 536 537config MMIO_NVRAM 538 bool 539 default n 540 541config MPIC_BROKEN_U3 542 bool 543 depends on PPC_MAPLE 544 default y 545 546config IBMVIO 547 depends on PPC_PSERIES || PPC_ISERIES 548 bool 549 default y 550 551config IBMEBUS 552 depends on PPC_PSERIES 553 bool "Support for GX bus based adapters" 554 help 555 Bus device driver for GX bus based adapters. 556 557config PPC_MPC106 558 bool 559 default n 560 561config PPC_970_NAP 562 bool 563 default n 564 565config PPC_INDIRECT_IO 566 bool 567 select GENERIC_IOMAP 568 default n 569 570config GENERIC_IOMAP 571 bool 572 default n 573 574source "drivers/cpufreq/Kconfig" 575 576config CPU_FREQ_PMAC 577 bool "Support for Apple PowerBooks" 578 depends on CPU_FREQ && ADB_PMU && PPC32 579 select CPU_FREQ_TABLE 580 help 581 This adds support for frequency switching on Apple PowerBooks, 582 this currently includes some models of iBook & Titanium 583 PowerBook. 584 585config CPU_FREQ_PMAC64 586 bool "Support for some Apple G5s" 587 depends on CPU_FREQ && PPC64 588 select CPU_FREQ_TABLE 589 help 590 This adds support for frequency switching on Apple iMac G5, 591 and some of the more recent desktop G5 machines as well. 592 593config PPC601_SYNC_FIX 594 bool "Workarounds for PPC601 bugs" 595 depends on 6xx && (PPC_PREP || PPC_PMAC) 596 help 597 Some versions of the PPC601 (the first PowerPC chip) have bugs which 598 mean that extra synchronization instructions are required near 599 certain instructions, typically those that make major changes to the 600 CPU state. These extra instructions reduce performance slightly. 601 If you say N here, these extra instructions will not be included, 602 resulting in a kernel which will run faster but may not run at all 603 on some systems with the PPC601 chip. 604 605 If in doubt, say Y here. 606 607config TAU 608 bool "On-chip CPU temperature sensor support" 609 depends on 6xx 610 help 611 G3 and G4 processors have an on-chip temperature sensor called the 612 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die 613 temperature within 2-4 degrees Celsius. This option shows the current 614 on-die temperature in /proc/cpuinfo if the cpu supports it. 615 616 Unfortunately, on some chip revisions, this sensor is very inaccurate 617 and in many cases, does not work at all, so don't assume the cpu 618 temp is actually what /proc/cpuinfo says it is. 619 620config TAU_INT 621 bool "Interrupt driven TAU driver (DANGEROUS)" 622 depends on TAU 623 ---help--- 624 The TAU supports an interrupt driven mode which causes an interrupt 625 whenever the temperature goes out of range. This is the fastest way 626 to get notified the temp has exceeded a range. With this option off, 627 a timer is used to re-check the temperature periodically. 628 629 However, on some cpus it appears that the TAU interrupt hardware 630 is buggy and can cause a situation which would lead unexplained hard 631 lockups. 632 633 Unless you are extending the TAU driver, or enjoy kernel/hardware 634 debugging, leave this option off. 635 636config TAU_AVERAGE 637 bool "Average high and low temp" 638 depends on TAU 639 ---help--- 640 The TAU hardware can compare the temperature to an upper and lower 641 bound. The default behavior is to show both the upper and lower 642 bound in /proc/cpuinfo. If the range is large, the temperature is 643 either changing a lot, or the TAU hardware is broken (likely on some 644 G4's). If the range is small (around 4 degrees), the temperature is 645 relatively stable. If you say Y here, a single temperature value, 646 halfway between the upper and lower bounds, will be reported in 647 /proc/cpuinfo. 648 649 If in doubt, say N here. 650 651endmenu 652 653source arch/powerpc/platforms/embedded6xx/Kconfig 654source arch/powerpc/platforms/4xx/Kconfig 655source arch/powerpc/platforms/82xx/Kconfig 656source arch/powerpc/platforms/83xx/Kconfig 657source arch/powerpc/platforms/85xx/Kconfig 658source arch/powerpc/platforms/86xx/Kconfig 659source arch/powerpc/platforms/8xx/Kconfig 660source arch/powerpc/platforms/pasemi/Kconfig 661 662menu "Kernel options" 663 664config HIGHMEM 665 bool "High memory support" 666 depends on PPC32 667 668source kernel/Kconfig.hz 669source kernel/Kconfig.preempt 670source "fs/Kconfig.binfmt" 671 672# We optimistically allocate largepages from the VM, so make the limit 673# large enough (16MB). This badly named config option is actually 674# max order + 1 675config FORCE_MAX_ZONEORDER 676 int 677 depends on PPC64 678 default "9" if PPC_64K_PAGES 679 default "13" 680 681config MATH_EMULATION 682 bool "Math emulation" 683 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 684 ---help--- 685 Some PowerPC chips designed for embedded applications do not have 686 a floating-point unit and therefore do not implement the 687 floating-point instructions in the PowerPC instruction set. If you 688 say Y here, the kernel will include code to emulate a floating-point 689 unit, which will allow programs that use floating-point 690 instructions to run. 691 692config IOMMU_VMERGE 693 bool "Enable IOMMU virtual merging (EXPERIMENTAL)" 694 depends on EXPERIMENTAL && PPC64 695 default n 696 help 697 Cause IO segments sent to a device for DMA to be merged virtually 698 by the IOMMU when they happen to have been allocated contiguously. 699 This doesn't add pressure to the IOMMU allocator. However, some 700 drivers don't support getting large merged segments coming back 701 from *_map_sg(). Say Y if you know the drivers you are using are 702 properly handling this case. 703 704config HOTPLUG_CPU 705 bool "Support for enabling/disabling CPUs" 706 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) 707 ---help--- 708 Say Y here to be able to disable and re-enable individual 709 CPUs at runtime on SMP machines. 710 711 Say N if you are unsure. 712 713config ARCH_ENABLE_MEMORY_HOTPLUG 714 def_bool y 715 716config KEXEC 717 bool "kexec system call (EXPERIMENTAL)" 718 depends on PPC_MULTIPLATFORM && EXPERIMENTAL 719 help 720 kexec is a system call that implements the ability to shutdown your 721 current kernel, and to start another kernel. It is like a reboot 722 but it is independent of the system firmware. And like a reboot 723 you can start any kernel with it, not just Linux. 724 725 The name comes from the similarity to the exec system call. 726 727 It is an ongoing process to be certain the hardware in a machine 728 is properly shutdown, so do not be surprised if this code does not 729 initially work for you. It may help to enable device hotplugging 730 support. As of this writing the exact hardware interface is 731 strongly in flux, so no good recommendation can be made. 732 733config CRASH_DUMP 734 bool "Build a kdump crash kernel (EXPERIMENTAL)" 735 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL 736 help 737 Build a kernel suitable for use as a kdump capture kernel. 738 The kernel will be linked at a different address than normal, and 739 so can only be used for Kdump. 740 741 Don't change this unless you know what you are doing. 742 743config EMBEDDEDBOOT 744 bool 745 depends on 8xx || 8260 746 default y 747 748config PC_KEYBOARD 749 bool "PC PS/2 style Keyboard" 750 depends on 4xx || CPM2 751 752config PPCBUG_NVRAM 753 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC 754 default y if PPC_PREP 755 756config IRQ_ALL_CPUS 757 bool "Distribute interrupts on all CPUs by default" 758 depends on SMP && !MV64360 759 help 760 This option gives the kernel permission to distribute IRQs across 761 multiple CPUs. Saying N here will route all IRQs to the first 762 CPU. Generally saying Y is safe, although some problems have been 763 reported with SMP Power Macintoshes with this option enabled. 764 765source "arch/powerpc/platforms/pseries/Kconfig" 766 767config NUMA 768 bool "NUMA support" 769 depends on PPC64 770 default y if SMP && PPC_PSERIES 771 772config NODES_SHIFT 773 int 774 default "4" 775 depends on NEED_MULTIPLE_NODES 776 777config ARCH_SELECT_MEMORY_MODEL 778 def_bool y 779 depends on PPC64 780 781config ARCH_FLATMEM_ENABLE 782 def_bool y 783 depends on (PPC64 && !NUMA) || PPC32 784 785config ARCH_SPARSEMEM_ENABLE 786 def_bool y 787 depends on PPC64 788 789config ARCH_SPARSEMEM_DEFAULT 790 def_bool y 791 depends on (SMP && PPC_PSERIES) || PPC_PS3 792 793config ARCH_POPULATES_NODE_MAP 794 def_bool y 795 796source "mm/Kconfig" 797 798config ARCH_MEMORY_PROBE 799 def_bool y 800 depends on MEMORY_HOTPLUG 801 802# Some NUMA nodes have memory ranges that span 803# other nodes. Even though a pfn is valid and 804# between a node's start and end pfns, it may not 805# reside on that node. See memmap_init_zone() 806# for details. 807config NODES_SPAN_OTHER_NODES 808 def_bool y 809 depends on NEED_MULTIPLE_NODES 810 811config PPC_64K_PAGES 812 bool "64k page size" 813 depends on PPC64 814 help 815 This option changes the kernel logical page size to 64k. On machines 816 without processor support for 64k pages, the kernel will simulate 817 them by loading each individual 4k page on demand transparently, 818 while on hardware with such support, it will be used to map 819 normal application pages. 820 821config SCHED_SMT 822 bool "SMT (Hyperthreading) scheduler support" 823 depends on PPC64 && SMP 824 help 825 SMT scheduler support improves the CPU scheduler's decision making 826 when dealing with POWER5 cpus at a cost of slightly increased 827 overhead in some places. If unsure say N here. 828 829config PROC_DEVICETREE 830 bool "Support for device tree in /proc" 831 depends on PROC_FS 832 help 833 This option adds a device-tree directory under /proc which contains 834 an image of the device tree that the kernel copies from Open 835 Firmware or other boot firmware. If unsure, say Y here. 836 837source "arch/powerpc/platforms/prep/Kconfig" 838 839config CMDLINE_BOOL 840 bool "Default bootloader kernel arguments" 841 842config CMDLINE 843 string "Initial kernel command string" 844 depends on CMDLINE_BOOL 845 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 846 help 847 On some platforms, there is currently no way for the boot loader to 848 pass arguments to the kernel. For these platforms, you can supply 849 some command-line options at build time by entering them here. In 850 most cases you will need to specify the root device here. 851 852if !44x || BROKEN 853source kernel/power/Kconfig 854endif 855 856config SECCOMP 857 bool "Enable seccomp to safely compute untrusted bytecode" 858 depends on PROC_FS 859 default y 860 help 861 This kernel feature is useful for number crunching applications 862 that may need to compute untrusted bytecode during their 863 execution. By using pipes or other transports made available to 864 the process as file descriptors supporting the read/write 865 syscalls, it's possible to isolate those applications in 866 their own address space using seccomp. Once seccomp is 867 enabled via /proc/<pid>/seccomp, it cannot be disabled 868 and the task is only allowed to execute a few safe syscalls 869 defined by each seccomp mode. 870 871 If unsure, say Y. Only embedded should say N here. 872 873endmenu 874 875config ISA_DMA_API 876 bool 877 default y 878 879menu "Bus options" 880 881config ISA 882 bool "Support for ISA-bus hardware" 883 depends on PPC_PREP || PPC_CHRP 884 select PPC_I8259 885 help 886 Find out whether you have ISA slots on your motherboard. ISA is the 887 name of a bus system, i.e. the way the CPU talks to the other stuff 888 inside your box. If you have an Apple machine, say N here; if you 889 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 890 you have an embedded board, consult your board documentation. 891 892config ZONE_DMA 893 bool 894 default y 895 896config GENERIC_ISA_DMA 897 bool 898 depends on PPC64 || POWER4 || 6xx && !CPM2 899 default y 900 901config MPIC 902 bool 903 default n 904 905config MPIC_WEIRD 906 bool 907 default n 908 909config PPC_I8259 910 bool 911 default n 912 913config PPC_INDIRECT_PCI 914 bool 915 depends on PCI 916 default y if 40x || 44x 917 default n 918 919config EISA 920 bool 921 922config SBUS 923 bool 924 925config FSL_SOC 926 bool 927 928# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 929config MCA 930 bool 931 932config PCI 933 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \ 934 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \ 935 || MPC7448HPC2 || PPC_PS3 936 default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \ 937 && !PPC_85xx && !PPC_86xx 938 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS 939 default PCI_QSPAN if !4xx && !CPM2 && 8xx 940 help 941 Find out whether your system includes a PCI bus. PCI is the name of 942 a bus system, i.e. the way the CPU talks to the other stuff inside 943 your box. If you say Y here, the kernel will include drivers and 944 infrastructure code to support PCI bus devices. 945 946config PCI_DOMAINS 947 bool 948 default PCI 949 950config PCI_QSPAN 951 bool "QSpan PCI" 952 depends on !4xx && !CPM2 && 8xx 953 select PPC_I8259 954 help 955 Say Y here if you have a system based on a Motorola 8xx-series 956 embedded processor with a QSPAN PCI interface, otherwise say N. 957 958config PCI_8260 959 bool 960 depends on PCI && 8260 961 select PPC_INDIRECT_PCI 962 default y 963 964config 8260_PCI9 965 bool "Enable workaround for MPC826x erratum PCI 9" 966 depends on PCI_8260 && !ADS8272 967 default y 968 969choice 970 prompt "IDMA channel for PCI 9 workaround" 971 depends on 8260_PCI9 972 973config 8260_PCI9_IDMA1 974 bool "IDMA1" 975 976config 8260_PCI9_IDMA2 977 bool "IDMA2" 978 979config 8260_PCI9_IDMA3 980 bool "IDMA3" 981 982config 8260_PCI9_IDMA4 983 bool "IDMA4" 984 985endchoice 986 987source "drivers/pci/pcie/Kconfig" 988 989source "drivers/pci/Kconfig" 990 991source "drivers/pcmcia/Kconfig" 992 993source "drivers/pci/hotplug/Kconfig" 994 995endmenu 996 997menu "Advanced setup" 998 depends on PPC32 999 1000config ADVANCED_OPTIONS 1001 bool "Prompt for advanced kernel configuration options" 1002 help 1003 This option will enable prompting for a variety of advanced kernel 1004 configuration options. These options can cause the kernel to not 1005 work if they are set incorrectly, but can be used to optimize certain 1006 aspects of kernel memory management. 1007 1008 Unless you know what you are doing, say N here. 1009 1010comment "Default settings for advanced configuration options are used" 1011 depends on !ADVANCED_OPTIONS 1012 1013config HIGHMEM_START_BOOL 1014 bool "Set high memory pool address" 1015 depends on ADVANCED_OPTIONS && HIGHMEM 1016 help 1017 This option allows you to set the base address of the kernel virtual 1018 area used to map high memory pages. This can be useful in 1019 optimizing the layout of kernel virtual memory. 1020 1021 Say N here unless you know what you are doing. 1022 1023config HIGHMEM_START 1024 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL 1025 default "0xfe000000" 1026 1027config LOWMEM_SIZE_BOOL 1028 bool "Set maximum low memory" 1029 depends on ADVANCED_OPTIONS 1030 help 1031 This option allows you to set the maximum amount of memory which 1032 will be used as "low memory", that is, memory which the kernel can 1033 access directly, without having to set up a kernel virtual mapping. 1034 This can be useful in optimizing the layout of kernel virtual 1035 memory. 1036 1037 Say N here unless you know what you are doing. 1038 1039config LOWMEM_SIZE 1040 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1041 default "0x30000000" 1042 1043config KERNEL_START_BOOL 1044 bool "Set custom kernel base address" 1045 depends on ADVANCED_OPTIONS 1046 help 1047 This option allows you to set the kernel virtual address at which 1048 the kernel will map low memory (the kernel image will be linked at 1049 this address). This can be useful in optimizing the virtual memory 1050 layout of the system. 1051 1052 Say N here unless you know what you are doing. 1053 1054config KERNEL_START 1055 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1056 default "0xc0000000" 1057 1058config TASK_SIZE_BOOL 1059 bool "Set custom user task size" 1060 depends on ADVANCED_OPTIONS 1061 help 1062 This option allows you to set the amount of virtual address space 1063 allocated to user tasks. This can be useful in optimizing the 1064 virtual memory layout of the system. 1065 1066 Say N here unless you know what you are doing. 1067 1068config TASK_SIZE 1069 hex "Size of user task space" if TASK_SIZE_BOOL 1070 default "0x80000000" 1071 1072config CONSISTENT_START_BOOL 1073 bool "Set custom consistent memory pool address" 1074 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1075 help 1076 This option allows you to set the base virtual address 1077 of the consistent memory pool. This pool of virtual 1078 memory is used to make consistent memory allocations. 1079 1080config CONSISTENT_START 1081 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL 1082 default "0xff100000" if NOT_COHERENT_CACHE 1083 1084config CONSISTENT_SIZE_BOOL 1085 bool "Set custom consistent memory pool size" 1086 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1087 help 1088 This option allows you to set the size of the 1089 consistent memory pool. This pool of virtual memory 1090 is used to make consistent memory allocations. 1091 1092config CONSISTENT_SIZE 1093 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1094 default "0x00200000" if NOT_COHERENT_CACHE 1095 1096config BOOT_LOAD_BOOL 1097 bool "Set the boot link/load address" 1098 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM 1099 help 1100 This option allows you to set the initial load address of the zImage 1101 or zImage.initrd file. This can be useful if you are on a board 1102 which has a small amount of memory. 1103 1104 Say N here unless you know what you are doing. 1105 1106config BOOT_LOAD 1107 hex "Link/load address for booting" if BOOT_LOAD_BOOL 1108 default "0x00400000" if 40x || 8xx || 8260 1109 default "0x01000000" if 44x 1110 default "0x00800000" 1111 1112config PIN_TLB 1113 bool "Pinned Kernel TLBs (860 ONLY)" 1114 depends on ADVANCED_OPTIONS && 8xx 1115endmenu 1116 1117if PPC64 1118config KERNEL_START 1119 hex 1120 default "0xc000000000000000" 1121endif 1122 1123source "net/Kconfig" 1124 1125source "drivers/Kconfig" 1126 1127source "fs/Kconfig" 1128 1129# XXX source "arch/ppc/8xx_io/Kconfig" 1130 1131# XXX source "arch/ppc/8260_io/Kconfig" 1132 1133source "arch/powerpc/sysdev/qe_lib/Kconfig" 1134 1135source "arch/powerpc/platforms/iseries/Kconfig" 1136 1137source "lib/Kconfig" 1138 1139menu "Instrumentation Support" 1140 depends on EXPERIMENTAL 1141 1142source "arch/powerpc/oprofile/Kconfig" 1143 1144config KPROBES 1145 bool "Kprobes (EXPERIMENTAL)" 1146 depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES 1147 help 1148 Kprobes allows you to trap at almost any kernel address and 1149 execute a callback function. register_kprobe() establishes 1150 a probepoint and specifies the callback. Kprobes is useful 1151 for kernel debugging, non-intrusive instrumentation and testing. 1152 If in doubt, say "N". 1153endmenu 1154 1155source "arch/powerpc/Kconfig.debug" 1156 1157source "security/Kconfig" 1158 1159config KEYS_COMPAT 1160 bool 1161 depends on COMPAT && KEYS 1162 default y 1163 1164source "crypto/Kconfig" 1165