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 UID16 30 bool 31 32config GENERIC_HARDIRQS 33 bool 34 default y 35 36config RWSEM_GENERIC_SPINLOCK 37 bool 38 39config RWSEM_XCHGADD_ALGORITHM 40 bool 41 default y 42 43config GENERIC_CALIBRATE_DELAY 44 bool 45 default y 46 47config PPC 48 bool 49 default y 50 51config EARLY_PRINTK 52 bool 53 default y 54 55config COMPAT 56 bool 57 default y if PPC64 58 59config SYSVIPC_COMPAT 60 bool 61 depends on COMPAT && SYSVIPC 62 default y 63 64# All PPC32s use generic nvram driver through ppc_md 65config GENERIC_NVRAM 66 bool 67 default y if PPC32 68 69config SCHED_NO_NO_OMIT_FRAME_POINTER 70 bool 71 default y 72 73config ARCH_MAY_HAVE_PC_FDC 74 bool 75 default y 76 77menu "Processor support" 78choice 79 prompt "Processor Type" 80 depends on PPC32 81 default 6xx 82 83config 6xx 84 bool "6xx/7xx/74xx" 85 select PPC_FPU 86 help 87 There are four families of PowerPC chips supported. The more common 88 types (601, 603, 604, 740, 750, 7400), the Motorola embedded 89 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC 90 embedded versions (403 and 405) and the high end 64 bit Power 91 processors (POWER 3, POWER4, and IBM PPC970 also known as G5). 92 93 Unless you are building a kernel for one of the embedded processor 94 systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx. 95 Note that the kernel runs in 32-bit mode even on 64-bit chips. 96 97config PPC_52xx 98 bool "Freescale 52xx" 99 100config PPC_82xx 101 bool "Freescale 82xx" 102 103config PPC_83xx 104 bool "Freescale 83xx" 105 106config 40x 107 bool "AMCC 40x" 108 109config 44x 110 bool "AMCC 44x" 111 112config 8xx 113 bool "Freescale 8xx" 114 115config E200 116 bool "Freescale e200" 117 118config E500 119 bool "Freescale e500" 120endchoice 121 122config POWER4_ONLY 123 bool "Optimize for POWER4" 124 depends on PPC64 125 default n 126 ---help--- 127 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors. 128 The resulting binary will not work on POWER3 or RS64 processors 129 when compiled with binutils 2.15 or later. 130 131config POWER3 132 bool 133 depends on PPC64 134 default y if !POWER4_ONLY 135 136config POWER4 137 depends on PPC64 138 def_bool y 139 140config PPC_FPU 141 bool 142 default y if PPC64 143 144config BOOKE 145 bool 146 depends on E200 || E500 147 default y 148 149config FSL_BOOKE 150 bool 151 depends on E200 || E500 152 default y 153 154config PTE_64BIT 155 bool 156 depends on 44x || E500 157 default y if 44x 158 default y if E500 && PHYS_64BIT 159 160config PHYS_64BIT 161 bool 'Large physical address support' if E500 162 depends on 44x || E500 163 default y if 44x 164 ---help--- 165 This option enables kernel support for larger than 32-bit physical 166 addresses. This features is not be available on all e500 cores. 167 168 If in doubt, say N here. 169 170config ALTIVEC 171 bool "AltiVec Support" 172 depends on 6xx || POWER4 173 ---help--- 174 This option enables kernel support for the Altivec extensions to the 175 PowerPC processor. The kernel currently supports saving and restoring 176 altivec registers, and turning on the 'altivec enable' bit so user 177 processes can execute altivec instructions. 178 179 This option is only usefully if you have a processor that supports 180 altivec (G4, otherwise known as 74xx series), but does not have 181 any affect on a non-altivec cpu (it does, however add code to the 182 kernel). 183 184 If in doubt, say Y here. 185 186config SPE 187 bool "SPE Support" 188 depends on E200 || E500 189 ---help--- 190 This option enables kernel support for the Signal Processing 191 Extensions (SPE) to the PowerPC processor. The kernel currently 192 supports saving and restoring SPE registers, and turning on the 193 'spe enable' bit so user processes can execute SPE instructions. 194 195 This option is only useful if you have a processor that supports 196 SPE (e500, otherwise known as 85xx series), but does not have any 197 effect on a non-spe cpu (it does, however add code to the kernel). 198 199 If in doubt, say Y here. 200 201config PPC_STD_MMU 202 bool 203 depends on 6xx || POWER3 || POWER4 || PPC64 204 default y 205 206config PPC_STD_MMU_32 207 def_bool y 208 depends on PPC_STD_MMU && PPC32 209 210config SMP 211 depends on PPC_STD_MMU 212 bool "Symmetric multi-processing support" 213 ---help--- 214 This enables support for systems with more than one CPU. If you have 215 a system with only one CPU, say N. If you have a system with more 216 than one CPU, say Y. Note that the kernel does not currently 217 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors 218 since they have inadequate hardware support for multiprocessor 219 operation. 220 221 If you say N here, the kernel will run on single and multiprocessor 222 machines, but will use only one CPU of a multiprocessor machine. If 223 you say Y here, the kernel will run on single-processor machines. 224 On a single-processor machine, the kernel will run faster if you say 225 N here. 226 227 If you don't know what to do here, say N. 228 229config NR_CPUS 230 int "Maximum number of CPUs (2-128)" 231 range 2 128 232 depends on SMP 233 default "32" if PPC64 234 default "4" 235 236config NOT_COHERENT_CACHE 237 bool 238 depends on 4xx || 8xx || E200 239 default y 240endmenu 241 242source "init/Kconfig" 243 244menu "Platform support" 245 depends on PPC64 || 6xx 246 247choice 248 prompt "Machine type" 249 default PPC_MULTIPLATFORM 250 251config PPC_MULTIPLATFORM 252 bool "Generic desktop/server/laptop" 253 help 254 Select this option if configuring for an IBM pSeries or 255 RS/6000 machine, an Apple machine, or a PReP, CHRP, 256 Maple or Cell-based machine. 257 258config PPC_ISERIES 259 bool "IBM Legacy iSeries" 260 depends on PPC64 261 262config EMBEDDED6xx 263 bool "Embedded 6xx/7xx/7xxx-based board" 264 depends on PPC32 && BROKEN 265 266config APUS 267 bool "Amiga-APUS" 268 depends on PPC32 && BROKEN 269 help 270 Select APUS if configuring for a PowerUP Amiga. 271 More information is available at: 272 <http://linux-apus.sourceforge.net/>. 273endchoice 274 275config PPC_PSERIES 276 depends on PPC_MULTIPLATFORM && PPC64 277 bool " IBM pSeries & new (POWER5-based) iSeries" 278 select PPC_I8259 279 select PPC_RTAS 280 select RTAS_ERROR_LOGGING 281 default y 282 283config PPC_CHRP 284 bool " Common Hardware Reference Platform (CHRP) based machines" 285 depends on PPC_MULTIPLATFORM && PPC32 286 select PPC_I8259 287 select PPC_INDIRECT_PCI 288 select PPC_RTAS 289 select PPC_MPC106 290 default y 291 292config PPC_PMAC 293 bool " Apple PowerMac based machines" 294 depends on PPC_MULTIPLATFORM 295 select PPC_INDIRECT_PCI if PPC32 296 select PPC_MPC106 if PPC32 297 default y 298 299config PPC_PMAC64 300 bool 301 depends on PPC_PMAC && POWER4 302 select U3_DART 303 select GENERIC_TBSYNC 304 default y 305 306config PPC_PREP 307 bool " PowerPC Reference Platform (PReP) based machines" 308 depends on PPC_MULTIPLATFORM && PPC32 && BROKEN 309 select PPC_I8259 310 select PPC_INDIRECT_PCI 311 default y 312 313config PPC_MAPLE 314 depends on PPC_MULTIPLATFORM && PPC64 315 bool " Maple 970FX Evaluation Board" 316 select U3_DART 317 select MPIC_BROKEN_U3 318 select GENERIC_TBSYNC 319 default n 320 help 321 This option enables support for the Maple 970FX Evaluation Board. 322 For more informations, refer to <http://www.970eval.com> 323 324config PPC_CELL 325 bool " Cell Broadband Processor Architecture" 326 depends on PPC_MULTIPLATFORM && PPC64 327 select PPC_RTAS 328 select MMIO_NVRAM 329 330config PPC_OF 331 bool 332 depends on PPC_MULTIPLATFORM # for now 333 default y 334 335config XICS 336 depends on PPC_PSERIES 337 bool 338 default y 339 340config U3_DART 341 bool 342 depends on PPC_MULTIPLATFORM && PPC64 343 default n 344 345config MPIC 346 depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE || PPC_CHRP 347 bool 348 default y 349 350config PPC_RTAS 351 bool 352 default n 353 354config RTAS_ERROR_LOGGING 355 bool 356 depends on PPC_RTAS 357 default n 358 359config RTAS_PROC 360 bool "Proc interface to RTAS" 361 depends on PPC_RTAS 362 default y 363 364config RTAS_FLASH 365 tristate "Firmware flash interface" 366 depends on PPC64 && RTAS_PROC 367 368config MMIO_NVRAM 369 bool 370 default n 371 372config MPIC_BROKEN_U3 373 bool 374 depends on PPC_MAPLE 375 default y 376 377config CELL_IIC 378 depends on PPC_CELL 379 bool 380 default y 381 382config IBMVIO 383 depends on PPC_PSERIES || PPC_ISERIES 384 bool 385 default y 386 387config IBMEBUS 388 depends on PPC_PSERIES 389 bool "Support for GX bus based adapters" 390 default y 391 help 392 Bus device driver for GX bus based adapters. 393 394config PPC_MPC106 395 bool 396 default n 397 398config GENERIC_TBSYNC 399 bool 400 default y if CONFIG_PPC32 && CONFIG_SMP 401 default n 402 403source "drivers/cpufreq/Kconfig" 404 405config CPU_FREQ_PMAC 406 bool "Support for Apple PowerBooks" 407 depends on CPU_FREQ && ADB_PMU && PPC32 408 select CPU_FREQ_TABLE 409 help 410 This adds support for frequency switching on Apple PowerBooks, 411 this currently includes some models of iBook & Titanium 412 PowerBook. 413 414config CPU_FREQ_PMAC64 415 bool "Support for some Apple G5s" 416 depends on CPU_FREQ && PMAC_SMU && PPC64 417 select CPU_FREQ_TABLE 418 help 419 This adds support for frequency switching on Apple iMac G5, 420 and some of the more recent desktop G5 machines as well. 421 422config PPC601_SYNC_FIX 423 bool "Workarounds for PPC601 bugs" 424 depends on 6xx && (PPC_PREP || PPC_PMAC) 425 help 426 Some versions of the PPC601 (the first PowerPC chip) have bugs which 427 mean that extra synchronization instructions are required near 428 certain instructions, typically those that make major changes to the 429 CPU state. These extra instructions reduce performance slightly. 430 If you say N here, these extra instructions will not be included, 431 resulting in a kernel which will run faster but may not run at all 432 on some systems with the PPC601 chip. 433 434 If in doubt, say Y here. 435 436config TAU 437 bool "Thermal Management Support" 438 depends on 6xx 439 help 440 G3 and G4 processors have an on-chip temperature sensor called the 441 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die 442 temperature within 2-4 degrees Celsius. This option shows the current 443 on-die temperature in /proc/cpuinfo if the cpu supports it. 444 445 Unfortunately, on some chip revisions, this sensor is very inaccurate 446 and in some cases, does not work at all, so don't assume the cpu 447 temp is actually what /proc/cpuinfo says it is. 448 449config TAU_INT 450 bool "Interrupt driven TAU driver (DANGEROUS)" 451 depends on TAU 452 ---help--- 453 The TAU supports an interrupt driven mode which causes an interrupt 454 whenever the temperature goes out of range. This is the fastest way 455 to get notified the temp has exceeded a range. With this option off, 456 a timer is used to re-check the temperature periodically. 457 458 However, on some cpus it appears that the TAU interrupt hardware 459 is buggy and can cause a situation which would lead unexplained hard 460 lockups. 461 462 Unless you are extending the TAU driver, or enjoy kernel/hardware 463 debugging, leave this option off. 464 465config TAU_AVERAGE 466 bool "Average high and low temp" 467 depends on TAU 468 ---help--- 469 The TAU hardware can compare the temperature to an upper and lower 470 bound. The default behavior is to show both the upper and lower 471 bound in /proc/cpuinfo. If the range is large, the temperature is 472 either changing a lot, or the TAU hardware is broken (likely on some 473 G4's). If the range is small (around 4 degrees), the temperature is 474 relatively stable. If you say Y here, a single temperature value, 475 halfway between the upper and lower bounds, will be reported in 476 /proc/cpuinfo. 477 478 If in doubt, say N here. 479endmenu 480 481source arch/powerpc/platforms/embedded6xx/Kconfig 482source arch/powerpc/platforms/4xx/Kconfig 483source arch/powerpc/platforms/85xx/Kconfig 484source arch/powerpc/platforms/8xx/Kconfig 485source arch/powerpc/platforms/cell/Kconfig 486 487menu "Kernel options" 488 489config HIGHMEM 490 bool "High memory support" 491 depends on PPC32 492 493source kernel/Kconfig.hz 494source kernel/Kconfig.preempt 495source "fs/Kconfig.binfmt" 496 497# We optimistically allocate largepages from the VM, so make the limit 498# large enough (16MB). This badly named config option is actually 499# max order + 1 500config FORCE_MAX_ZONEORDER 501 int 502 depends on PPC64 503 default "9" if PPC_64K_PAGES 504 default "13" 505 506config MATH_EMULATION 507 bool "Math emulation" 508 depends on 4xx || 8xx || E200 || E500 509 ---help--- 510 Some PowerPC chips designed for embedded applications do not have 511 a floating-point unit and therefore do not implement the 512 floating-point instructions in the PowerPC instruction set. If you 513 say Y here, the kernel will include code to emulate a floating-point 514 unit, which will allow programs that use floating-point 515 instructions to run. 516 517config IOMMU_VMERGE 518 bool "Enable IOMMU virtual merging (EXPERIMENTAL)" 519 depends on EXPERIMENTAL && PPC64 520 default n 521 help 522 Cause IO segments sent to a device for DMA to be merged virtually 523 by the IOMMU when they happen to have been allocated contiguously. 524 This doesn't add pressure to the IOMMU allocator. However, some 525 drivers don't support getting large merged segments coming back 526 from *_map_sg(). Say Y if you know the drivers you are using are 527 properly handling this case. 528 529config HOTPLUG_CPU 530 bool "Support for enabling/disabling CPUs" 531 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) 532 ---help--- 533 Say Y here to be able to disable and re-enable individual 534 CPUs at runtime on SMP machines. 535 536 Say N if you are unsure. 537 538config KEXEC 539 bool "kexec system call (EXPERIMENTAL)" 540 depends on PPC_MULTIPLATFORM && EXPERIMENTAL 541 help 542 kexec is a system call that implements the ability to shutdown your 543 current kernel, and to start another kernel. It is like a reboot 544 but it is indepedent of the system firmware. And like a reboot 545 you can start any kernel with it, not just Linux. 546 547 The name comes from the similiarity to the exec system call. 548 549 It is an ongoing process to be certain the hardware in a machine 550 is properly shutdown, so do not be surprised if this code does not 551 initially work for you. It may help to enable device hotplugging 552 support. As of this writing the exact hardware interface is 553 strongly in flux, so no good recommendation can be made. 554 555config EMBEDDEDBOOT 556 bool 557 depends on 8xx || 8260 558 default y 559 560config PC_KEYBOARD 561 bool "PC PS/2 style Keyboard" 562 depends on 4xx || CPM2 563 564config PPCBUG_NVRAM 565 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC 566 default y if PPC_PREP 567 568config IRQ_ALL_CPUS 569 bool "Distribute interrupts on all CPUs by default" 570 depends on SMP && !MV64360 571 help 572 This option gives the kernel permission to distribute IRQs across 573 multiple CPUs. Saying N here will route all IRQs to the first 574 CPU. Generally saying Y is safe, although some problems have been 575 reported with SMP Power Macintoshes with this option enabled. 576 577source "arch/powerpc/platforms/pseries/Kconfig" 578 579config NUMA 580 bool "NUMA support" 581 depends on PPC64 582 default y if SMP && PPC_PSERIES 583 584config ARCH_SELECT_MEMORY_MODEL 585 def_bool y 586 depends on PPC64 587 588config ARCH_FLATMEM_ENABLE 589 def_bool y 590 depends on PPC64 && !NUMA 591 592config ARCH_SPARSEMEM_ENABLE 593 def_bool y 594 595config ARCH_SPARSEMEM_DEFAULT 596 def_bool y 597 depends on SMP && PPC_PSERIES 598 599source "mm/Kconfig" 600 601config HAVE_ARCH_EARLY_PFN_TO_NID 602 def_bool y 603 depends on NEED_MULTIPLE_NODES 604 605config ARCH_MEMORY_PROBE 606 def_bool y 607 depends on MEMORY_HOTPLUG 608 609config PPC_64K_PAGES 610 bool "64k page size" 611 depends on PPC64 612 help 613 This option changes the kernel logical page size to 64k. On machines 614 without processor support for 64k pages, the kernel will simulate 615 them by loading each individual 4k page on demand transparently, 616 while on hardware with such support, it will be used to map 617 normal application pages. 618 619config SCHED_SMT 620 bool "SMT (Hyperthreading) scheduler support" 621 depends on PPC64 && SMP 622 default off 623 help 624 SMT scheduler support improves the CPU scheduler's decision making 625 when dealing with POWER5 cpus at a cost of slightly increased 626 overhead in some places. If unsure say N here. 627 628config PROC_DEVICETREE 629 bool "Support for device tree in /proc" 630 depends on PROC_FS 631 help 632 This option adds a device-tree directory under /proc which contains 633 an image of the device tree that the kernel copies from Open 634 Firmware or other boot firmware. If unsure, say Y here. 635 636source "arch/powerpc/platforms/prep/Kconfig" 637 638config CMDLINE_BOOL 639 bool "Default bootloader kernel arguments" 640 depends on !PPC_ISERIES 641 642config CMDLINE 643 string "Initial kernel command string" 644 depends on CMDLINE_BOOL 645 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 646 help 647 On some platforms, there is currently no way for the boot loader to 648 pass arguments to the kernel. For these platforms, you can supply 649 some command-line options at build time by entering them here. In 650 most cases you will need to specify the root device here. 651 652if !44x || BROKEN 653source kernel/power/Kconfig 654endif 655 656config SECCOMP 657 bool "Enable seccomp to safely compute untrusted bytecode" 658 depends on PROC_FS 659 default y 660 help 661 This kernel feature is useful for number crunching applications 662 that may need to compute untrusted bytecode during their 663 execution. By using pipes or other transports made available to 664 the process as file descriptors supporting the read/write 665 syscalls, it's possible to isolate those applications in 666 their own address space using seccomp. Once seccomp is 667 enabled via /proc/<pid>/seccomp, it cannot be disabled 668 and the task is only allowed to execute a few safe syscalls 669 defined by each seccomp mode. 670 671 If unsure, say Y. Only embedded should say N here. 672 673endmenu 674 675config ISA_DMA_API 676 bool 677 default y 678 679menu "Bus options" 680 681config ISA 682 bool "Support for ISA-bus hardware" 683 depends on PPC_PREP || PPC_CHRP 684 select PPC_I8259 685 help 686 Find out whether you have ISA slots on your motherboard. ISA is the 687 name of a bus system, i.e. the way the CPU talks to the other stuff 688 inside your box. If you have an Apple machine, say N here; if you 689 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 690 you have an embedded board, consult your board documentation. 691 692config GENERIC_ISA_DMA 693 bool 694 depends on PPC64 || POWER4 || 6xx && !CPM2 695 default y 696 697config PPC_I8259 698 bool 699 default y if 85xx 700 default n 701 702config PPC_INDIRECT_PCI 703 bool 704 depends on PCI 705 default y if 40x || 44x || 85xx || 83xx 706 default n 707 708config EISA 709 bool 710 711config SBUS 712 bool 713 714# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 715config MCA 716 bool 717 718config PCI 719 bool "PCI support" if 40x || CPM2 || 83xx || 85xx || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) 720 default y if !40x && !CPM2 && !8xx && !APUS && !83xx && !85xx 721 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS 722 default PCI_QSPAN if !4xx && !CPM2 && 8xx 723 help 724 Find out whether your system includes a PCI bus. PCI is the name of 725 a bus system, i.e. the way the CPU talks to the other stuff inside 726 your box. If you say Y here, the kernel will include drivers and 727 infrastructure code to support PCI bus devices. 728 729config PCI_DOMAINS 730 bool 731 default PCI 732 733config MPC83xx_PCI2 734 bool " Supprt for 2nd PCI host controller" 735 depends on PCI && MPC834x 736 default y if MPC834x_SYS 737 738config PCI_QSPAN 739 bool "QSpan PCI" 740 depends on !4xx && !CPM2 && 8xx 741 select PPC_I8259 742 help 743 Say Y here if you have a system based on a Motorola 8xx-series 744 embedded processor with a QSPAN PCI interface, otherwise say N. 745 746config PCI_8260 747 bool 748 depends on PCI && 8260 749 select PPC_INDIRECT_PCI 750 default y 751 752config 8260_PCI9 753 bool " Enable workaround for MPC826x erratum PCI 9" 754 depends on PCI_8260 && !ADS8272 755 default y 756 757choice 758 prompt " IDMA channel for PCI 9 workaround" 759 depends on 8260_PCI9 760 761config 8260_PCI9_IDMA1 762 bool "IDMA1" 763 764config 8260_PCI9_IDMA2 765 bool "IDMA2" 766 767config 8260_PCI9_IDMA3 768 bool "IDMA3" 769 770config 8260_PCI9_IDMA4 771 bool "IDMA4" 772 773endchoice 774 775source "drivers/pci/Kconfig" 776 777source "drivers/pcmcia/Kconfig" 778 779source "drivers/pci/hotplug/Kconfig" 780 781endmenu 782 783menu "Advanced setup" 784 depends on PPC32 785 786config ADVANCED_OPTIONS 787 bool "Prompt for advanced kernel configuration options" 788 help 789 This option will enable prompting for a variety of advanced kernel 790 configuration options. These options can cause the kernel to not 791 work if they are set incorrectly, but can be used to optimize certain 792 aspects of kernel memory management. 793 794 Unless you know what you are doing, say N here. 795 796comment "Default settings for advanced configuration options are used" 797 depends on !ADVANCED_OPTIONS 798 799config HIGHMEM_START_BOOL 800 bool "Set high memory pool address" 801 depends on ADVANCED_OPTIONS && HIGHMEM 802 help 803 This option allows you to set the base address of the kernel virtual 804 area used to map high memory pages. This can be useful in 805 optimizing the layout of kernel virtual memory. 806 807 Say N here unless you know what you are doing. 808 809config HIGHMEM_START 810 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL 811 default "0xfe000000" 812 813config LOWMEM_SIZE_BOOL 814 bool "Set maximum low memory" 815 depends on ADVANCED_OPTIONS 816 help 817 This option allows you to set the maximum amount of memory which 818 will be used as "low memory", that is, memory which the kernel can 819 access directly, without having to set up a kernel virtual mapping. 820 This can be useful in optimizing the layout of kernel virtual 821 memory. 822 823 Say N here unless you know what you are doing. 824 825config LOWMEM_SIZE 826 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 827 default "0x30000000" 828 829config KERNEL_START_BOOL 830 bool "Set custom kernel base address" 831 depends on ADVANCED_OPTIONS 832 help 833 This option allows you to set the kernel virtual address at which 834 the kernel will map low memory (the kernel image will be linked at 835 this address). This can be useful in optimizing the virtual memory 836 layout of the system. 837 838 Say N here unless you know what you are doing. 839 840config KERNEL_START 841 hex "Virtual address of kernel base" if KERNEL_START_BOOL 842 default "0xc0000000" 843 844config TASK_SIZE_BOOL 845 bool "Set custom user task size" 846 depends on ADVANCED_OPTIONS 847 help 848 This option allows you to set the amount of virtual address space 849 allocated to user tasks. This can be useful in optimizing the 850 virtual memory layout of the system. 851 852 Say N here unless you know what you are doing. 853 854config TASK_SIZE 855 hex "Size of user task space" if TASK_SIZE_BOOL 856 default "0x80000000" 857 858config CONSISTENT_START_BOOL 859 bool "Set custom consistent memory pool address" 860 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 861 help 862 This option allows you to set the base virtual address 863 of the the consistent memory pool. This pool of virtual 864 memory is used to make consistent memory allocations. 865 866config CONSISTENT_START 867 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL 868 default "0xff100000" if NOT_COHERENT_CACHE 869 870config CONSISTENT_SIZE_BOOL 871 bool "Set custom consistent memory pool size" 872 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 873 help 874 This option allows you to set the size of the the 875 consistent memory pool. This pool of virtual memory 876 is used to make consistent memory allocations. 877 878config CONSISTENT_SIZE 879 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 880 default "0x00200000" if NOT_COHERENT_CACHE 881 882config BOOT_LOAD_BOOL 883 bool "Set the boot link/load address" 884 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM 885 help 886 This option allows you to set the initial load address of the zImage 887 or zImage.initrd file. This can be useful if you are on a board 888 which has a small amount of memory. 889 890 Say N here unless you know what you are doing. 891 892config BOOT_LOAD 893 hex "Link/load address for booting" if BOOT_LOAD_BOOL 894 default "0x00400000" if 40x || 8xx || 8260 895 default "0x01000000" if 44x 896 default "0x00800000" 897 898config PIN_TLB 899 bool "Pinned Kernel TLBs (860 ONLY)" 900 depends on ADVANCED_OPTIONS && 8xx 901endmenu 902 903if PPC64 904config KERNEL_START 905 hex 906 default "0xc000000000000000" 907endif 908 909source "net/Kconfig" 910 911source "drivers/Kconfig" 912 913source "fs/Kconfig" 914 915# XXX source "arch/ppc/8xx_io/Kconfig" 916 917# XXX source "arch/ppc/8260_io/Kconfig" 918 919source "arch/powerpc/platforms/iseries/Kconfig" 920 921source "lib/Kconfig" 922 923menu "Instrumentation Support" 924 depends on EXPERIMENTAL 925 926source "arch/powerpc/oprofile/Kconfig" 927 928config KPROBES 929 bool "Kprobes (EXPERIMENTAL)" 930 depends on PPC64 931 help 932 Kprobes allows you to trap at almost any kernel address and 933 execute a callback function. register_kprobe() establishes 934 a probepoint and specifies the callback. Kprobes is useful 935 for kernel debugging, non-intrusive instrumentation and testing. 936 If in doubt, say "N". 937endmenu 938 939source "arch/powerpc/Kconfig.debug" 940 941source "security/Kconfig" 942 943config KEYS_COMPAT 944 bool 945 depends on COMPAT && KEYS 946 default y 947 948source "crypto/Kconfig" 949