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 RWSEM_GENERIC_SPINLOCK 34 bool 35 36config RWSEM_XCHGADD_ALGORITHM 37 bool 38 default y 39 40config GENERIC_CALIBRATE_DELAY 41 bool 42 default y 43 44config PPC 45 bool 46 default y 47 48config EARLY_PRINTK 49 bool 50 default y 51 52config COMPAT 53 bool 54 default y if PPC64 55 56config SYSVIPC_COMPAT 57 bool 58 depends on COMPAT && SYSVIPC 59 default y 60 61# All PPC32s use generic nvram driver through ppc_md 62config GENERIC_NVRAM 63 bool 64 default y if PPC32 65 66config SCHED_NO_NO_OMIT_FRAME_POINTER 67 bool 68 default y 69 70config ARCH_MAY_HAVE_PC_FDC 71 bool 72 default y 73 74menu "Processor support" 75choice 76 prompt "Processor Type" 77 depends on PPC32 78 default 6xx 79 80config 6xx 81 bool "6xx/7xx/74xx" 82 select PPC_FPU 83 help 84 There are four families of PowerPC chips supported. The more common 85 types (601, 603, 604, 740, 750, 7400), the Motorola embedded 86 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC 87 embedded versions (403 and 405) and the high end 64 bit Power 88 processors (POWER 3, POWER4, and IBM PPC970 also known as G5). 89 90 Unless you are building a kernel for one of the embedded processor 91 systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx. 92 Note that the kernel runs in 32-bit mode even on 64-bit chips. 93 94config PPC_52xx 95 bool "Freescale 52xx" 96 97config PPC_82xx 98 bool "Freescale 82xx" 99 100config PPC_83xx 101 bool "Freescale 83xx" 102 103config 40x 104 bool "AMCC 40x" 105 106config 44x 107 bool "AMCC 44x" 108 109config 8xx 110 bool "Freescale 8xx" 111 112config E200 113 bool "Freescale e200" 114 115config E500 116 bool "Freescale e500" 117endchoice 118 119config POWER4_ONLY 120 bool "Optimize for POWER4" 121 depends on PPC64 122 default n 123 ---help--- 124 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors. 125 The resulting binary will not work on POWER3 or RS64 processors 126 when compiled with binutils 2.15 or later. 127 128config POWER3 129 bool 130 depends on PPC64 131 default y if !POWER4_ONLY 132 133config POWER4 134 depends on PPC64 135 def_bool y 136 137config PPC_FPU 138 bool 139 default y if PPC64 140 141config BOOKE 142 bool 143 depends on E200 || E500 144 default y 145 146config FSL_BOOKE 147 bool 148 depends on E200 || E500 149 default y 150 151config PTE_64BIT 152 bool 153 depends on 44x || E500 154 default y if 44x 155 default y if E500 && PHYS_64BIT 156 157config PHYS_64BIT 158 bool 'Large physical address support' if E500 159 depends on 44x || E500 160 default y if 44x 161 ---help--- 162 This option enables kernel support for larger than 32-bit physical 163 addresses. This features is not be available on all e500 cores. 164 165 If in doubt, say N here. 166 167config ALTIVEC 168 bool "AltiVec Support" 169 depends on 6xx || POWER4 170 ---help--- 171 This option enables kernel support for the Altivec extensions to the 172 PowerPC processor. The kernel currently supports saving and restoring 173 altivec registers, and turning on the 'altivec enable' bit so user 174 processes can execute altivec instructions. 175 176 This option is only usefully if you have a processor that supports 177 altivec (G4, otherwise known as 74xx series), but does not have 178 any affect on a non-altivec cpu (it does, however add code to the 179 kernel). 180 181 If in doubt, say Y here. 182 183config SPE 184 bool "SPE Support" 185 depends on E200 || E500 186 ---help--- 187 This option enables kernel support for the Signal Processing 188 Extensions (SPE) to the PowerPC processor. The kernel currently 189 supports saving and restoring SPE registers, and turning on the 190 'spe enable' bit so user processes can execute SPE instructions. 191 192 This option is only useful if you have a processor that supports 193 SPE (e500, otherwise known as 85xx series), but does not have any 194 effect on a non-spe cpu (it does, however add code to the kernel). 195 196 If in doubt, say Y here. 197 198config PPC_STD_MMU 199 bool 200 depends on 6xx || POWER3 || POWER4 || PPC64 201 default y 202 203config PPC_STD_MMU_32 204 def_bool y 205 depends on PPC_STD_MMU && PPC32 206 207config SMP 208 depends on PPC_STD_MMU 209 bool "Symmetric multi-processing support" 210 ---help--- 211 This enables support for systems with more than one CPU. If you have 212 a system with only one CPU, say N. If you have a system with more 213 than one CPU, say Y. Note that the kernel does not currently 214 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors 215 since they have inadequate hardware support for multiprocessor 216 operation. 217 218 If you say N here, the kernel will run on single and multiprocessor 219 machines, but will use only one CPU of a multiprocessor machine. If 220 you say Y here, the kernel will run on single-processor machines. 221 On a single-processor machine, the kernel will run faster if you say 222 N here. 223 224 If you don't know what to do here, say N. 225 226config NR_CPUS 227 int "Maximum number of CPUs (2-128)" 228 range 2 128 229 depends on SMP 230 default "32" if PPC64 231 default "4" 232 233config NOT_COHERENT_CACHE 234 bool 235 depends on 4xx || 8xx || E200 236 default y 237endmenu 238 239source "init/Kconfig" 240 241menu "Platform support" 242 depends on PPC64 || 6xx 243 244choice 245 prompt "Machine type" 246 default PPC_MULTIPLATFORM 247 248config PPC_MULTIPLATFORM 249 bool "Generic desktop/server/laptop" 250 help 251 Select this option if configuring for an IBM pSeries or 252 RS/6000 machine, an Apple machine, or a PReP, CHRP, 253 Maple or Cell-based machine. 254 255config PPC_ISERIES 256 bool "IBM Legacy iSeries" 257 depends on PPC64 258 259config EMBEDDED6xx 260 bool "Embedded 6xx/7xx/7xxx-based board" 261 depends on PPC32 && BROKEN 262 263config APUS 264 bool "Amiga-APUS" 265 depends on PPC32 && BROKEN 266 help 267 Select APUS if configuring for a PowerUP Amiga. 268 More information is available at: 269 <http://linux-apus.sourceforge.net/>. 270endchoice 271 272config PPC_PSERIES 273 depends on PPC_MULTIPLATFORM && PPC64 274 bool " IBM pSeries & new (POWER5-based) iSeries" 275 select PPC_I8259 276 select PPC_RTAS 277 select RTAS_ERROR_LOGGING 278 default y 279 280config PPC_CHRP 281 bool " Common Hardware Reference Platform (CHRP) based machines" 282 depends on PPC_MULTIPLATFORM && PPC32 283 select PPC_I8259 284 select PPC_INDIRECT_PCI 285 select PPC_RTAS 286 select PPC_MPC106 287 default y 288 289config PPC_PMAC 290 bool " Apple PowerMac based machines" 291 depends on PPC_MULTIPLATFORM 292 select PPC_INDIRECT_PCI if PPC32 293 select PPC_MPC106 if PPC32 294 default y 295 296config PPC_PMAC64 297 bool 298 depends on PPC_PMAC && POWER4 299 select U3_DART 300 select MPIC_BROKEN_U3 301 select GENERIC_TBSYNC 302 default y 303 304config PPC_PREP 305 bool " PowerPC Reference Platform (PReP) based machines" 306 depends on PPC_MULTIPLATFORM && PPC32 && BROKEN 307 select PPC_I8259 308 select PPC_INDIRECT_PCI 309 default y 310 311config PPC_MAPLE 312 depends on PPC_MULTIPLATFORM && PPC64 313 bool " Maple 970FX Evaluation Board" 314 select U3_DART 315 select MPIC_BROKEN_U3 316 select GENERIC_TBSYNC 317 default n 318 help 319 This option enables support for the Maple 970FX Evaluation Board. 320 For more informations, refer to <http://www.970eval.com> 321 322config PPC_CELL 323 bool " Cell Broadband Processor Architecture" 324 depends on PPC_MULTIPLATFORM && PPC64 325 select PPC_RTAS 326 select MMIO_NVRAM 327 328config PPC_OF 329 def_bool y 330 331config XICS 332 depends on PPC_PSERIES 333 bool 334 default y 335 336config U3_DART 337 bool 338 depends on PPC_MULTIPLATFORM && PPC64 339 default n 340 341config MPIC 342 depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE || PPC_CHRP 343 bool 344 default y 345 346config PPC_RTAS 347 bool 348 default n 349 350config RTAS_ERROR_LOGGING 351 bool 352 depends on PPC_RTAS 353 default n 354 355config RTAS_PROC 356 bool "Proc interface to RTAS" 357 depends on PPC_RTAS 358 default y 359 360config RTAS_FLASH 361 tristate "Firmware flash interface" 362 depends on PPC64 && RTAS_PROC 363 364config MMIO_NVRAM 365 bool 366 default n 367 368config MPIC_BROKEN_U3 369 bool 370 depends on PPC_MAPLE 371 default y 372 373config CELL_IIC 374 depends on PPC_CELL 375 bool 376 default y 377 378config CRASH_DUMP 379 bool "kernel crash dumps (EXPERIMENTAL)" 380 depends on PPC_MULTIPLATFORM 381 depends on EXPERIMENTAL 382 help 383 Build a kernel suitable for use as a kdump capture kernel. 384 The kernel will be linked at a different address than normal, and 385 so can only be used for Kdump. 386 387 Don't change this unless you know what you are doing. 388 389config IBMVIO 390 depends on PPC_PSERIES || PPC_ISERIES 391 bool 392 default y 393 394config IBMEBUS 395 depends on PPC_PSERIES 396 bool "Support for GX bus based adapters" 397 help 398 Bus device driver for GX bus based adapters. 399 400config PPC_MPC106 401 bool 402 default n 403 404config GENERIC_TBSYNC 405 bool 406 default y if CONFIG_PPC32 && CONFIG_SMP 407 default n 408 409source "drivers/cpufreq/Kconfig" 410 411config CPU_FREQ_PMAC 412 bool "Support for Apple PowerBooks" 413 depends on CPU_FREQ && ADB_PMU && PPC32 414 select CPU_FREQ_TABLE 415 help 416 This adds support for frequency switching on Apple PowerBooks, 417 this currently includes some models of iBook & Titanium 418 PowerBook. 419 420config CPU_FREQ_PMAC64 421 bool "Support for some Apple G5s" 422 depends on CPU_FREQ && PMAC_SMU && PPC64 423 select CPU_FREQ_TABLE 424 help 425 This adds support for frequency switching on Apple iMac G5, 426 and some of the more recent desktop G5 machines as well. 427 428config PPC601_SYNC_FIX 429 bool "Workarounds for PPC601 bugs" 430 depends on 6xx && (PPC_PREP || PPC_PMAC) 431 help 432 Some versions of the PPC601 (the first PowerPC chip) have bugs which 433 mean that extra synchronization instructions are required near 434 certain instructions, typically those that make major changes to the 435 CPU state. These extra instructions reduce performance slightly. 436 If you say N here, these extra instructions will not be included, 437 resulting in a kernel which will run faster but may not run at all 438 on some systems with the PPC601 chip. 439 440 If in doubt, say Y here. 441 442config TAU 443 bool "Thermal Management Support" 444 depends on 6xx 445 help 446 G3 and G4 processors have an on-chip temperature sensor called the 447 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die 448 temperature within 2-4 degrees Celsius. This option shows the current 449 on-die temperature in /proc/cpuinfo if the cpu supports it. 450 451 Unfortunately, on some chip revisions, this sensor is very inaccurate 452 and in some cases, does not work at all, so don't assume the cpu 453 temp is actually what /proc/cpuinfo says it is. 454 455config TAU_INT 456 bool "Interrupt driven TAU driver (DANGEROUS)" 457 depends on TAU 458 ---help--- 459 The TAU supports an interrupt driven mode which causes an interrupt 460 whenever the temperature goes out of range. This is the fastest way 461 to get notified the temp has exceeded a range. With this option off, 462 a timer is used to re-check the temperature periodically. 463 464 However, on some cpus it appears that the TAU interrupt hardware 465 is buggy and can cause a situation which would lead unexplained hard 466 lockups. 467 468 Unless you are extending the TAU driver, or enjoy kernel/hardware 469 debugging, leave this option off. 470 471config TAU_AVERAGE 472 bool "Average high and low temp" 473 depends on TAU 474 ---help--- 475 The TAU hardware can compare the temperature to an upper and lower 476 bound. The default behavior is to show both the upper and lower 477 bound in /proc/cpuinfo. If the range is large, the temperature is 478 either changing a lot, or the TAU hardware is broken (likely on some 479 G4's). If the range is small (around 4 degrees), the temperature is 480 relatively stable. If you say Y here, a single temperature value, 481 halfway between the upper and lower bounds, will be reported in 482 /proc/cpuinfo. 483 484 If in doubt, say N here. 485endmenu 486 487source arch/powerpc/platforms/embedded6xx/Kconfig 488source arch/powerpc/platforms/4xx/Kconfig 489source arch/powerpc/platforms/85xx/Kconfig 490source arch/powerpc/platforms/8xx/Kconfig 491source arch/powerpc/platforms/cell/Kconfig 492 493menu "Kernel options" 494 495config HIGHMEM 496 bool "High memory support" 497 depends on PPC32 498 499source kernel/Kconfig.hz 500source kernel/Kconfig.preempt 501source "fs/Kconfig.binfmt" 502 503# We optimistically allocate largepages from the VM, so make the limit 504# large enough (16MB). This badly named config option is actually 505# max order + 1 506config FORCE_MAX_ZONEORDER 507 int 508 depends on PPC64 509 default "9" if PPC_64K_PAGES 510 default "13" 511 512config MATH_EMULATION 513 bool "Math emulation" 514 depends on 4xx || 8xx || E200 || E500 515 ---help--- 516 Some PowerPC chips designed for embedded applications do not have 517 a floating-point unit and therefore do not implement the 518 floating-point instructions in the PowerPC instruction set. If you 519 say Y here, the kernel will include code to emulate a floating-point 520 unit, which will allow programs that use floating-point 521 instructions to run. 522 523config IOMMU_VMERGE 524 bool "Enable IOMMU virtual merging (EXPERIMENTAL)" 525 depends on EXPERIMENTAL && PPC64 526 default n 527 help 528 Cause IO segments sent to a device for DMA to be merged virtually 529 by the IOMMU when they happen to have been allocated contiguously. 530 This doesn't add pressure to the IOMMU allocator. However, some 531 drivers don't support getting large merged segments coming back 532 from *_map_sg(). Say Y if you know the drivers you are using are 533 properly handling this case. 534 535config HOTPLUG_CPU 536 bool "Support for enabling/disabling CPUs" 537 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) 538 ---help--- 539 Say Y here to be able to disable and re-enable individual 540 CPUs at runtime on SMP machines. 541 542 Say N if you are unsure. 543 544config KEXEC 545 bool "kexec system call (EXPERIMENTAL)" 546 depends on PPC_MULTIPLATFORM && EXPERIMENTAL 547 help 548 kexec is a system call that implements the ability to shutdown your 549 current kernel, and to start another kernel. It is like a reboot 550 but it is indepedent of the system firmware. And like a reboot 551 you can start any kernel with it, not just Linux. 552 553 The name comes from the similiarity to the exec system call. 554 555 It is an ongoing process to be certain the hardware in a machine 556 is properly shutdown, so do not be surprised if this code does not 557 initially work for you. It may help to enable device hotplugging 558 support. As of this writing the exact hardware interface is 559 strongly in flux, so no good recommendation can be made. 560 561config EMBEDDEDBOOT 562 bool 563 depends on 8xx || 8260 564 default y 565 566config PC_KEYBOARD 567 bool "PC PS/2 style Keyboard" 568 depends on 4xx || CPM2 569 570config PPCBUG_NVRAM 571 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC 572 default y if PPC_PREP 573 574config IRQ_ALL_CPUS 575 bool "Distribute interrupts on all CPUs by default" 576 depends on SMP && !MV64360 577 help 578 This option gives the kernel permission to distribute IRQs across 579 multiple CPUs. Saying N here will route all IRQs to the first 580 CPU. Generally saying Y is safe, although some problems have been 581 reported with SMP Power Macintoshes with this option enabled. 582 583source "arch/powerpc/platforms/pseries/Kconfig" 584 585config NUMA 586 bool "NUMA support" 587 depends on PPC64 588 default y if SMP && PPC_PSERIES 589 590config ARCH_SELECT_MEMORY_MODEL 591 def_bool y 592 depends on PPC64 593 594config ARCH_FLATMEM_ENABLE 595 def_bool y 596 depends on (PPC64 && !NUMA) || PPC32 597 598config ARCH_SPARSEMEM_ENABLE 599 def_bool y 600 depends on PPC64 601 602config ARCH_SPARSEMEM_DEFAULT 603 def_bool y 604 depends on SMP && PPC_PSERIES 605 606source "mm/Kconfig" 607 608config HAVE_ARCH_EARLY_PFN_TO_NID 609 def_bool y 610 depends on NEED_MULTIPLE_NODES 611 612config ARCH_MEMORY_PROBE 613 def_bool y 614 depends on MEMORY_HOTPLUG 615 616config PPC_64K_PAGES 617 bool "64k page size" 618 depends on PPC64 619 help 620 This option changes the kernel logical page size to 64k. On machines 621 without processor support for 64k pages, the kernel will simulate 622 them by loading each individual 4k page on demand transparently, 623 while on hardware with such support, it will be used to map 624 normal application pages. 625 626config SCHED_SMT 627 bool "SMT (Hyperthreading) scheduler support" 628 depends on PPC64 && SMP 629 default off 630 help 631 SMT scheduler support improves the CPU scheduler's decision making 632 when dealing with POWER5 cpus at a cost of slightly increased 633 overhead in some places. If unsure say N here. 634 635config PROC_DEVICETREE 636 bool "Support for device tree in /proc" 637 depends on PROC_FS 638 help 639 This option adds a device-tree directory under /proc which contains 640 an image of the device tree that the kernel copies from Open 641 Firmware or other boot firmware. If unsure, say Y here. 642 643source "arch/powerpc/platforms/prep/Kconfig" 644 645config CMDLINE_BOOL 646 bool "Default bootloader kernel arguments" 647 depends on !PPC_ISERIES 648 649config CMDLINE 650 string "Initial kernel command string" 651 depends on CMDLINE_BOOL 652 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 653 help 654 On some platforms, there is currently no way for the boot loader to 655 pass arguments to the kernel. For these platforms, you can supply 656 some command-line options at build time by entering them here. In 657 most cases you will need to specify the root device here. 658 659if !44x || BROKEN 660source kernel/power/Kconfig 661endif 662 663config SECCOMP 664 bool "Enable seccomp to safely compute untrusted bytecode" 665 depends on PROC_FS 666 default y 667 help 668 This kernel feature is useful for number crunching applications 669 that may need to compute untrusted bytecode during their 670 execution. By using pipes or other transports made available to 671 the process as file descriptors supporting the read/write 672 syscalls, it's possible to isolate those applications in 673 their own address space using seccomp. Once seccomp is 674 enabled via /proc/<pid>/seccomp, it cannot be disabled 675 and the task is only allowed to execute a few safe syscalls 676 defined by each seccomp mode. 677 678 If unsure, say Y. Only embedded should say N here. 679 680endmenu 681 682config ISA_DMA_API 683 bool 684 default y 685 686menu "Bus options" 687 688config ISA 689 bool "Support for ISA-bus hardware" 690 depends on PPC_PREP || PPC_CHRP 691 select PPC_I8259 692 help 693 Find out whether you have ISA slots on your motherboard. ISA is the 694 name of a bus system, i.e. the way the CPU talks to the other stuff 695 inside your box. If you have an Apple machine, say N here; if you 696 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 697 you have an embedded board, consult your board documentation. 698 699config GENERIC_ISA_DMA 700 bool 701 depends on PPC64 || POWER4 || 6xx && !CPM2 702 default y 703 704config PPC_I8259 705 bool 706 default y if 85xx 707 default n 708 709config PPC_INDIRECT_PCI 710 bool 711 depends on PCI 712 default y if 40x || 44x || 85xx || 83xx 713 default n 714 715config EISA 716 bool 717 718config SBUS 719 bool 720 721# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 722config MCA 723 bool 724 725config PCI 726 bool "PCI support" if 40x || CPM2 || 83xx || 85xx || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) 727 default y if !40x && !CPM2 && !8xx && !APUS && !83xx && !85xx 728 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS 729 default PCI_QSPAN if !4xx && !CPM2 && 8xx 730 help 731 Find out whether your system includes a PCI bus. PCI is the name of 732 a bus system, i.e. the way the CPU talks to the other stuff inside 733 your box. If you say Y here, the kernel will include drivers and 734 infrastructure code to support PCI bus devices. 735 736config PCI_DOMAINS 737 bool 738 default PCI 739 740config MPC83xx_PCI2 741 bool " Supprt for 2nd PCI host controller" 742 depends on PCI && MPC834x 743 default y if MPC834x_SYS 744 745config PCI_QSPAN 746 bool "QSpan PCI" 747 depends on !4xx && !CPM2 && 8xx 748 select PPC_I8259 749 help 750 Say Y here if you have a system based on a Motorola 8xx-series 751 embedded processor with a QSPAN PCI interface, otherwise say N. 752 753config PCI_8260 754 bool 755 depends on PCI && 8260 756 select PPC_INDIRECT_PCI 757 default y 758 759config 8260_PCI9 760 bool " Enable workaround for MPC826x erratum PCI 9" 761 depends on PCI_8260 && !ADS8272 762 default y 763 764choice 765 prompt " IDMA channel for PCI 9 workaround" 766 depends on 8260_PCI9 767 768config 8260_PCI9_IDMA1 769 bool "IDMA1" 770 771config 8260_PCI9_IDMA2 772 bool "IDMA2" 773 774config 8260_PCI9_IDMA3 775 bool "IDMA3" 776 777config 8260_PCI9_IDMA4 778 bool "IDMA4" 779 780endchoice 781 782source "drivers/pci/Kconfig" 783 784source "drivers/pcmcia/Kconfig" 785 786source "drivers/pci/hotplug/Kconfig" 787 788endmenu 789 790menu "Advanced setup" 791 depends on PPC32 792 793config ADVANCED_OPTIONS 794 bool "Prompt for advanced kernel configuration options" 795 help 796 This option will enable prompting for a variety of advanced kernel 797 configuration options. These options can cause the kernel to not 798 work if they are set incorrectly, but can be used to optimize certain 799 aspects of kernel memory management. 800 801 Unless you know what you are doing, say N here. 802 803comment "Default settings for advanced configuration options are used" 804 depends on !ADVANCED_OPTIONS 805 806config HIGHMEM_START_BOOL 807 bool "Set high memory pool address" 808 depends on ADVANCED_OPTIONS && HIGHMEM 809 help 810 This option allows you to set the base address of the kernel virtual 811 area used to map high memory pages. This can be useful in 812 optimizing the layout of kernel virtual memory. 813 814 Say N here unless you know what you are doing. 815 816config HIGHMEM_START 817 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL 818 default "0xfe000000" 819 820config LOWMEM_SIZE_BOOL 821 bool "Set maximum low memory" 822 depends on ADVANCED_OPTIONS 823 help 824 This option allows you to set the maximum amount of memory which 825 will be used as "low memory", that is, memory which the kernel can 826 access directly, without having to set up a kernel virtual mapping. 827 This can be useful in optimizing the layout of kernel virtual 828 memory. 829 830 Say N here unless you know what you are doing. 831 832config LOWMEM_SIZE 833 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 834 default "0x30000000" 835 836config KERNEL_START_BOOL 837 bool "Set custom kernel base address" 838 depends on ADVANCED_OPTIONS 839 help 840 This option allows you to set the kernel virtual address at which 841 the kernel will map low memory (the kernel image will be linked at 842 this address). This can be useful in optimizing the virtual memory 843 layout of the system. 844 845 Say N here unless you know what you are doing. 846 847config KERNEL_START 848 hex "Virtual address of kernel base" if KERNEL_START_BOOL 849 default "0xc0000000" 850 851config TASK_SIZE_BOOL 852 bool "Set custom user task size" 853 depends on ADVANCED_OPTIONS 854 help 855 This option allows you to set the amount of virtual address space 856 allocated to user tasks. This can be useful in optimizing the 857 virtual memory layout of the system. 858 859 Say N here unless you know what you are doing. 860 861config TASK_SIZE 862 hex "Size of user task space" if TASK_SIZE_BOOL 863 default "0x80000000" 864 865config CONSISTENT_START_BOOL 866 bool "Set custom consistent memory pool address" 867 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 868 help 869 This option allows you to set the base virtual address 870 of the the consistent memory pool. This pool of virtual 871 memory is used to make consistent memory allocations. 872 873config CONSISTENT_START 874 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL 875 default "0xff100000" if NOT_COHERENT_CACHE 876 877config CONSISTENT_SIZE_BOOL 878 bool "Set custom consistent memory pool size" 879 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 880 help 881 This option allows you to set the size of the the 882 consistent memory pool. This pool of virtual memory 883 is used to make consistent memory allocations. 884 885config CONSISTENT_SIZE 886 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 887 default "0x00200000" if NOT_COHERENT_CACHE 888 889config BOOT_LOAD_BOOL 890 bool "Set the boot link/load address" 891 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM 892 help 893 This option allows you to set the initial load address of the zImage 894 or zImage.initrd file. This can be useful if you are on a board 895 which has a small amount of memory. 896 897 Say N here unless you know what you are doing. 898 899config BOOT_LOAD 900 hex "Link/load address for booting" if BOOT_LOAD_BOOL 901 default "0x00400000" if 40x || 8xx || 8260 902 default "0x01000000" if 44x 903 default "0x00800000" 904 905config PIN_TLB 906 bool "Pinned Kernel TLBs (860 ONLY)" 907 depends on ADVANCED_OPTIONS && 8xx 908endmenu 909 910if PPC64 911config KERNEL_START 912 hex 913 default "0xc000000000000000" 914endif 915 916source "net/Kconfig" 917 918source "drivers/Kconfig" 919 920source "fs/Kconfig" 921 922# XXX source "arch/ppc/8xx_io/Kconfig" 923 924# XXX source "arch/ppc/8260_io/Kconfig" 925 926source "arch/powerpc/platforms/iseries/Kconfig" 927 928source "lib/Kconfig" 929 930menu "Instrumentation Support" 931 depends on EXPERIMENTAL 932 933source "arch/powerpc/oprofile/Kconfig" 934 935config KPROBES 936 bool "Kprobes (EXPERIMENTAL)" 937 depends on PPC64 938 help 939 Kprobes allows you to trap at almost any kernel address and 940 execute a callback function. register_kprobe() establishes 941 a probepoint and specifies the callback. Kprobes is useful 942 for kernel debugging, non-intrusive instrumentation and testing. 943 If in doubt, say "N". 944endmenu 945 946source "arch/powerpc/Kconfig.debug" 947 948source "security/Kconfig" 949 950config KEYS_COMPAT 951 bool 952 depends on COMPAT && KEYS 953 default y 954 955source "crypto/Kconfig" 956