1source "arch/powerpc/platforms/Kconfig.cputype" 2 3config PPC32 4 bool 5 default y if !PPC64 6 7config 32BIT 8 bool 9 default y if PPC32 10 11config 64BIT 12 bool 13 default y if PPC64 14 15config WORD_SIZE 16 int 17 default 64 if PPC64 18 default 32 if !PPC64 19 20config ARCH_PHYS_ADDR_T_64BIT 21 def_bool PPC64 || PHYS_64BIT 22 23config ARCH_DMA_ADDR_T_64BIT 24 def_bool ARCH_PHYS_ADDR_T_64BIT 25 26config MMU 27 bool 28 default y 29 30config GENERIC_CMOS_UPDATE 31 def_bool y 32 33config GENERIC_TIME_VSYSCALL 34 def_bool y 35 36config GENERIC_CLOCKEVENTS 37 def_bool y 38 39config HAVE_SETUP_PER_CPU_AREA 40 def_bool PPC64 41 42config NEED_PER_CPU_EMBED_FIRST_CHUNK 43 def_bool PPC64 44 45config NR_IRQS 46 int "Number of virtual interrupt numbers" 47 range 32 32768 48 default "512" 49 help 50 This defines the number of virtual interrupt numbers the kernel 51 can manage. Virtual interrupt numbers are what you see in 52 /proc/interrupts. If you configure your system to have too few, 53 drivers will fail to load or worse - handle with care. 54 55config STACKTRACE_SUPPORT 56 bool 57 default y 58 59config HAVE_LATENCYTOP_SUPPORT 60 def_bool y 61 62config TRACE_IRQFLAGS_SUPPORT 63 bool 64 default y 65 66config LOCKDEP_SUPPORT 67 bool 68 default y 69 70config RWSEM_GENERIC_SPINLOCK 71 bool 72 73config RWSEM_XCHGADD_ALGORITHM 74 bool 75 default y 76 77config GENERIC_LOCKBREAK 78 bool 79 default y 80 depends on SMP && PREEMPT 81 82config ARCH_HAS_ILOG2_U32 83 bool 84 default y 85 86config ARCH_HAS_ILOG2_U64 87 bool 88 default y if 64BIT 89 90config GENERIC_HWEIGHT 91 bool 92 default y 93 94config GENERIC_FIND_NEXT_BIT 95 bool 96 default y 97 98config GENERIC_FIND_BIT_LE 99 bool 100 default y 101 102config GENERIC_GPIO 103 bool 104 help 105 Generic GPIO API support 106 107config ARCH_NO_VIRT_TO_BUS 108 def_bool PPC64 109 110config PPC 111 bool 112 default y 113 select OF 114 select OF_EARLY_FLATTREE 115 select HAVE_FTRACE_MCOUNT_RECORD 116 select HAVE_DYNAMIC_FTRACE 117 select HAVE_FUNCTION_TRACER 118 select HAVE_FUNCTION_GRAPH_TRACER 119 select ARCH_WANT_OPTIONAL_GPIOLIB 120 select HAVE_IDE 121 select HAVE_IOREMAP_PROT 122 select HAVE_EFFICIENT_UNALIGNED_ACCESS 123 select HAVE_KPROBES 124 select HAVE_ARCH_KGDB 125 select HAVE_KRETPROBES 126 select HAVE_ARCH_TRACEHOOK 127 select HAVE_MEMBLOCK 128 select HAVE_DMA_ATTRS 129 select HAVE_DMA_API_DEBUG 130 select USE_GENERIC_SMP_HELPERS if SMP 131 select HAVE_OPROFILE 132 select HAVE_SYSCALL_WRAPPERS if PPC64 133 select GENERIC_ATOMIC64 if PPC32 134 select HAVE_IRQ_WORK 135 select HAVE_PERF_EVENTS 136 select HAVE_REGS_AND_STACK_ACCESS_API 137 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 138 select HAVE_GENERIC_HARDIRQS 139 select HAVE_SPARSE_IRQ 140 select IRQ_PER_CPU 141 select GENERIC_IRQ_SHOW 142 select GENERIC_IRQ_SHOW_LEVEL 143 144config EARLY_PRINTK 145 bool 146 default y 147 148config COMPAT 149 bool 150 default y if PPC64 151 select COMPAT_BINFMT_ELF 152 153config SYSVIPC_COMPAT 154 bool 155 depends on COMPAT && SYSVIPC 156 default y 157 158# All PPC32s use generic nvram driver through ppc_md 159config GENERIC_NVRAM 160 bool 161 default y if PPC32 162 163config SCHED_OMIT_FRAME_POINTER 164 bool 165 default y 166 167config ARCH_MAY_HAVE_PC_FDC 168 bool 169 default !PPC_PSERIES || PCI 170 171config PPC_OF 172 def_bool y 173 174config PPC_UDBG_16550 175 bool 176 default n 177 178config GENERIC_TBSYNC 179 bool 180 default y if PPC32 && SMP 181 default n 182 183config AUDIT_ARCH 184 bool 185 default y 186 187config GENERIC_BUG 188 bool 189 default y 190 depends on BUG 191 192config SYS_SUPPORTS_APM_EMULATION 193 default y if PMAC_APM_EMU 194 bool 195 196config DEFAULT_UIMAGE 197 bool 198 help 199 Used to allow a board to specify it wants a uImage built by default 200 default n 201 202config REDBOOT 203 bool 204 205config ARCH_HIBERNATION_POSSIBLE 206 bool 207 default y 208 209config ARCH_SUSPEND_POSSIBLE 210 def_bool y 211 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 212 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x 213 214config PPC_DCR_NATIVE 215 bool 216 default n 217 218config PPC_DCR_MMIO 219 bool 220 default n 221 222config PPC_DCR 223 bool 224 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 225 default y 226 227config PPC_OF_PLATFORM_PCI 228 bool 229 depends on PCI 230 depends on PPC64 # not supported on 32 bits yet 231 default n 232 233config ARCH_SUPPORTS_DEBUG_PAGEALLOC 234 def_bool y 235 236config PPC_ADV_DEBUG_REGS 237 bool 238 depends on 40x || BOOKE 239 default y 240 241config PPC_ADV_DEBUG_IACS 242 int 243 depends on PPC_ADV_DEBUG_REGS 244 default 4 if 44x 245 default 2 246 247config PPC_ADV_DEBUG_DACS 248 int 249 depends on PPC_ADV_DEBUG_REGS 250 default 2 251 252config PPC_ADV_DEBUG_DVCS 253 int 254 depends on PPC_ADV_DEBUG_REGS 255 default 2 if 44x 256 default 0 257 258config PPC_ADV_DEBUG_DAC_RANGE 259 bool 260 depends on PPC_ADV_DEBUG_REGS && 44x 261 default y 262 263source "init/Kconfig" 264 265source "kernel/Kconfig.freezer" 266 267source "arch/powerpc/sysdev/Kconfig" 268source "arch/powerpc/platforms/Kconfig" 269 270menu "Kernel options" 271 272config HIGHMEM 273 bool "High memory support" 274 depends on PPC32 275 276source kernel/time/Kconfig 277source kernel/Kconfig.hz 278source kernel/Kconfig.preempt 279source "fs/Kconfig.binfmt" 280 281config HUGETLB_PAGE_SIZE_VARIABLE 282 bool 283 depends on HUGETLB_PAGE 284 default y 285 286config MATH_EMULATION 287 bool "Math emulation" 288 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 289 ---help--- 290 Some PowerPC chips designed for embedded applications do not have 291 a floating-point unit and therefore do not implement the 292 floating-point instructions in the PowerPC instruction set. If you 293 say Y here, the kernel will include code to emulate a floating-point 294 unit, which will allow programs that use floating-point 295 instructions to run. 296 297config 8XX_MINIMAL_FPEMU 298 bool "Minimal math emulation for 8xx" 299 depends on 8xx && !MATH_EMULATION 300 help 301 Older arch/ppc kernels still emulated a few floating point 302 instructions such as load and store, even when full math 303 emulation is disabled. Say "Y" here if you want to preserve 304 this behavior. 305 306 It is recommended that you build a soft-float userspace instead. 307 308config IOMMU_HELPER 309 def_bool PPC64 310 311config SWIOTLB 312 bool "SWIOTLB support" 313 default n 314 select IOMMU_HELPER 315 ---help--- 316 Support for IO bounce buffering for systems without an IOMMU. 317 This allows us to DMA to the full physical address space on 318 platforms where the size of a physical address is larger 319 than the bus address. Not all platforms support this. 320 321config HOTPLUG_CPU 322 bool "Support for enabling/disabling CPUs" 323 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) 324 ---help--- 325 Say Y here to be able to disable and re-enable individual 326 CPUs at runtime on SMP machines. 327 328 Say N if you are unsure. 329 330config ARCH_CPU_PROBE_RELEASE 331 def_bool y 332 depends on HOTPLUG_CPU 333 334config ARCH_ENABLE_MEMORY_HOTPLUG 335 def_bool y 336 337config ARCH_HAS_WALK_MEMORY 338 def_bool y 339 340config ARCH_ENABLE_MEMORY_HOTREMOVE 341 def_bool y 342 343config KEXEC 344 bool "kexec system call (EXPERIMENTAL)" 345 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL 346 help 347 kexec is a system call that implements the ability to shutdown your 348 current kernel, and to start another kernel. It is like a reboot 349 but it is independent of the system firmware. And like a reboot 350 you can start any kernel with it, not just Linux. 351 352 The name comes from the similarity to the exec system call. 353 354 It is an ongoing process to be certain the hardware in a machine 355 is properly shutdown, so do not be surprised if this code does not 356 initially work for you. It may help to enable device hotplugging 357 support. As of this writing the exact hardware interface is 358 strongly in flux, so no good recommendation can be made. 359 360config CRASH_DUMP 361 bool "Build a kdump crash kernel" 362 depends on PPC64 || 6xx || FSL_BOOKE 363 select RELOCATABLE if PPC64 || FSL_BOOKE 364 help 365 Build a kernel suitable for use as a kdump capture kernel. 366 The same kernel binary can be used as production kernel and dump 367 capture kernel. 368 369config PHYP_DUMP 370 bool "Hypervisor-assisted dump (EXPERIMENTAL)" 371 depends on PPC_PSERIES && EXPERIMENTAL 372 help 373 Hypervisor-assisted dump is meant to be a kdump replacement 374 offering robustness and speed not possible without system 375 hypervisor assistance. 376 377 If unsure, say "N" 378 379config PPCBUG_NVRAM 380 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC 381 default y if PPC_PREP 382 383config IRQ_ALL_CPUS 384 bool "Distribute interrupts on all CPUs by default" 385 depends on SMP && !MV64360 386 help 387 This option gives the kernel permission to distribute IRQs across 388 multiple CPUs. Saying N here will route all IRQs to the first 389 CPU. Generally saying Y is safe, although some problems have been 390 reported with SMP Power Macintoshes with this option enabled. 391 392config NUMA 393 bool "NUMA support" 394 depends on PPC64 395 default y if SMP && PPC_PSERIES 396 397config NODES_SHIFT 398 int 399 default "8" if PPC64 400 default "4" 401 depends on NEED_MULTIPLE_NODES 402 403config MAX_ACTIVE_REGIONS 404 int 405 default "256" if PPC64 406 default "32" 407 408config ARCH_SELECT_MEMORY_MODEL 409 def_bool y 410 depends on PPC64 411 412config ARCH_FLATMEM_ENABLE 413 def_bool y 414 depends on (PPC64 && !NUMA) || PPC32 415 416config ARCH_SPARSEMEM_ENABLE 417 def_bool y 418 depends on PPC64 419 select SPARSEMEM_VMEMMAP_ENABLE 420 421config ARCH_SPARSEMEM_DEFAULT 422 def_bool y 423 depends on (SMP && PPC_PSERIES) || PPC_PS3 424 425config ARCH_POPULATES_NODE_MAP 426 def_bool y 427 428config SYS_SUPPORTS_HUGETLBFS 429 def_bool y 430 depends on PPC_BOOK3S_64 431 432source "mm/Kconfig" 433 434config ARCH_MEMORY_PROBE 435 def_bool y 436 depends on MEMORY_HOTPLUG 437 438# Some NUMA nodes have memory ranges that span 439# other nodes. Even though a pfn is valid and 440# between a node's start and end pfns, it may not 441# reside on that node. See memmap_init_zone() 442# for details. 443config NODES_SPAN_OTHER_NODES 444 def_bool y 445 depends on NEED_MULTIPLE_NODES 446 447config PPC_HAS_HASH_64K 448 bool 449 depends on PPC64 450 default n 451 452config STDBINUTILS 453 bool "Using standard binutils settings" 454 depends on 44x 455 default y 456 help 457 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 458 Note, that kernel will be able to run only those applications, 459 which had been compiled using binutils later than 2.17.50.0.3 with 460 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 461 the older binutils, you can patch them with a trivial patch, which 462 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 463 464choice 465 prompt "Page size" 466 default PPC_4K_PAGES 467 help 468 Select the kernel logical page size. Increasing the page size 469 will reduce software overhead at each page boundary, allow 470 hardware prefetch mechanisms to be more effective, and allow 471 larger dma transfers increasing IO efficiency and reducing 472 overhead. However the utilization of memory will increase. 473 For example, each cached file will using a multiple of the 474 page size to hold its contents and the difference between the 475 end of file and the end of page is wasted. 476 477 Some dedicated systems, such as software raid serving with 478 accelerated calculations, have shown significant increases. 479 480 If you configure a 64 bit kernel for 64k pages but the 481 processor does not support them, then the kernel will simulate 482 them with 4k pages, loading them on demand, but with the 483 reduced software overhead and larger internal fragmentation. 484 For the 32 bit kernel, a large page option will not be offered 485 unless it is supported by the configured processor. 486 487 If unsure, choose 4K_PAGES. 488 489config PPC_4K_PAGES 490 bool "4k page size" 491 492config PPC_16K_PAGES 493 bool "16k page size" if 44x 494 495config PPC_64K_PAGES 496 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 497 select PPC_HAS_HASH_64K if PPC_STD_MMU_64 498 499config PPC_256K_PAGES 500 bool "256k page size" if 44x 501 depends on !STDBINUTILS 502 help 503 Make the page size 256k. 504 505 As the ELF standard only requires alignment to support page 506 sizes up to 64k, you will need to compile all of your user 507 space applications with a non-standard binutils settings 508 (see the STDBINUTILS description for details). 509 510 Say N unless you know what you are doing. 511 512endchoice 513 514config FORCE_MAX_ZONEORDER 515 int "Maximum zone order" 516 range 9 64 if PPC64 && PPC_64K_PAGES 517 default "9" if PPC64 && PPC_64K_PAGES 518 range 13 64 if PPC64 && !PPC_64K_PAGES 519 default "13" if PPC64 && !PPC_64K_PAGES 520 range 9 64 if PPC32 && PPC_16K_PAGES 521 default "9" if PPC32 && PPC_16K_PAGES 522 range 7 64 if PPC32 && PPC_64K_PAGES 523 default "7" if PPC32 && PPC_64K_PAGES 524 range 5 64 if PPC32 && PPC_256K_PAGES 525 default "5" if PPC32 && PPC_256K_PAGES 526 range 11 64 527 default "11" 528 help 529 The kernel memory allocator divides physically contiguous memory 530 blocks into "zones", where each zone is a power of two number of 531 pages. This option selects the largest power of two that the kernel 532 keeps in the memory allocator. If you need to allocate very large 533 blocks of physically contiguous memory, then you may need to 534 increase this value. 535 536 This config option is actually maximum order plus one. For example, 537 a value of 11 means that the largest free memory block is 2^10 pages. 538 539 The page size is not necessarily 4KB. For example, on 64-bit 540 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 541 this in mind when choosing a value for this option. 542 543config PPC_SUBPAGE_PROT 544 bool "Support setting protections for 4k subpages" 545 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 546 help 547 This option adds support for a system call to allow user programs 548 to set access permissions (read/write, readonly, or no access) 549 on the 4k subpages of each 64k page. 550 551config SCHED_SMT 552 bool "SMT (Hyperthreading) scheduler support" 553 depends on PPC64 && SMP 554 help 555 SMT scheduler support improves the CPU scheduler's decision making 556 when dealing with POWER5 cpus at a cost of slightly increased 557 overhead in some places. If unsure say N here. 558 559config CMDLINE_BOOL 560 bool "Default bootloader kernel arguments" 561 562config CMDLINE 563 string "Initial kernel command string" 564 depends on CMDLINE_BOOL 565 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 566 help 567 On some platforms, there is currently no way for the boot loader to 568 pass arguments to the kernel. For these platforms, you can supply 569 some command-line options at build time by entering them here. In 570 most cases you will need to specify the root device here. 571 572config EXTRA_TARGETS 573 string "Additional default image types" 574 help 575 List additional targets to be built by the bootwrapper here (separated 576 by spaces). This is useful for targets that depend of device tree 577 files in the .dts directory. 578 579 Targets in this list will be build as part of the default build 580 target, or when the user does a 'make zImage' or a 581 'make zImage.initrd'. 582 583 If unsure, leave blank 584 585config ARCH_WANTS_FREEZER_CONTROL 586 def_bool y 587 depends on ADB_PMU 588 589source kernel/power/Kconfig 590 591config SECCOMP 592 bool "Enable seccomp to safely compute untrusted bytecode" 593 depends on PROC_FS 594 default y 595 help 596 This kernel feature is useful for number crunching applications 597 that may need to compute untrusted bytecode during their 598 execution. By using pipes or other transports made available to 599 the process as file descriptors supporting the read/write 600 syscalls, it's possible to isolate those applications in 601 their own address space using seccomp. Once seccomp is 602 enabled via /proc/<pid>/seccomp, it cannot be disabled 603 and the task is only allowed to execute a few safe syscalls 604 defined by each seccomp mode. 605 606 If unsure, say Y. Only embedded should say N here. 607 608endmenu 609 610config ISA_DMA_API 611 bool 612 default !PPC_ISERIES || PCI 613 614menu "Bus options" 615 616config ISA 617 bool "Support for ISA-bus hardware" 618 depends on PPC_PREP || PPC_CHRP 619 select PPC_I8259 620 help 621 Find out whether you have ISA slots on your motherboard. ISA is the 622 name of a bus system, i.e. the way the CPU talks to the other stuff 623 inside your box. If you have an Apple machine, say N here; if you 624 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 625 you have an embedded board, consult your board documentation. 626 627config ZONE_DMA 628 bool 629 default y 630 631config NEED_DMA_MAP_STATE 632 def_bool (PPC64 || NOT_COHERENT_CACHE) 633 634config NEED_SG_DMA_LENGTH 635 def_bool y 636 637config GENERIC_ISA_DMA 638 bool 639 depends on ISA_DMA_API 640 default y 641 642config PPC_INDIRECT_PCI 643 bool 644 depends on PCI 645 default y if 40x || 44x 646 default n 647 648config EISA 649 bool 650 651config SBUS 652 bool 653 654config FSL_SOC 655 bool 656 657config FSL_PCI 658 bool 659 select PPC_INDIRECT_PCI 660 select PCI_QUIRKS 661 662config FSL_PMC 663 bool 664 default y 665 depends on SUSPEND && (PPC_85xx || PPC_86xx) 666 help 667 Freescale MPC85xx/MPC86xx power management controller support 668 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 669 670config PPC4xx_CPM 671 bool 672 default y 673 depends on SUSPEND && (44x || 40x) 674 help 675 PPC4xx Clock Power Management (CPM) support (suspend/resume). 676 It also enables support for two different idle states (idle-wait 677 and idle-doze). 678 679config 4xx_SOC 680 bool 681 682config FSL_LBC 683 bool "Freescale Local Bus support" 684 depends on FSL_SOC 685 help 686 Enables reporting of errors from the Freescale local bus 687 controller. Also contains some common code used by 688 drivers for specific local bus peripherals. 689 690config FSL_GTM 691 bool 692 depends on PPC_83xx || QUICC_ENGINE || CPM2 693 help 694 Freescale General-purpose Timers support 695 696# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 697config MCA 698 bool 699 700# Platforms that what PCI turned unconditionally just do select PCI 701# in their config node. Platforms that want to choose at config 702# time should select PPC_PCI_CHOICE 703config PPC_PCI_CHOICE 704 bool 705 706config PCI 707 bool "PCI support" if PPC_PCI_CHOICE 708 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 709 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 710 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx 711 default PCI_QSPAN if !4xx && !CPM2 && 8xx 712 select ARCH_SUPPORTS_MSI 713 help 714 Find out whether your system includes a PCI bus. PCI is the name of 715 a bus system, i.e. the way the CPU talks to the other stuff inside 716 your box. If you say Y here, the kernel will include drivers and 717 infrastructure code to support PCI bus devices. 718 719config PCI_DOMAINS 720 def_bool PCI 721 722config PCI_SYSCALL 723 def_bool PCI 724 725config PCI_QSPAN 726 bool "QSpan PCI" 727 depends on !4xx && !CPM2 && 8xx 728 select PPC_I8259 729 help 730 Say Y here if you have a system based on a Motorola 8xx-series 731 embedded processor with a QSPAN PCI interface, otherwise say N. 732 733config PCI_8260 734 bool 735 depends on PCI && 8260 736 select PPC_INDIRECT_PCI 737 default y 738 739config 8260_PCI9 740 bool "Enable workaround for MPC826x erratum PCI 9" 741 depends on PCI_8260 && !8272 742 default y 743 744choice 745 prompt "IDMA channel for PCI 9 workaround" 746 depends on 8260_PCI9 747 748config 8260_PCI9_IDMA1 749 bool "IDMA1" 750 751config 8260_PCI9_IDMA2 752 bool "IDMA2" 753 754config 8260_PCI9_IDMA3 755 bool "IDMA3" 756 757config 8260_PCI9_IDMA4 758 bool "IDMA4" 759 760endchoice 761 762source "drivers/pci/pcie/Kconfig" 763 764source "drivers/pci/Kconfig" 765 766source "drivers/pcmcia/Kconfig" 767 768source "drivers/pci/hotplug/Kconfig" 769 770config HAS_RAPIDIO 771 bool 772 default n 773 774config RAPIDIO 775 bool "RapidIO support" 776 depends on HAS_RAPIDIO || PCI 777 help 778 If you say Y here, the kernel will include drivers and 779 infrastructure code to support RapidIO interconnect devices. 780 781config FSL_RIO 782 bool "Freescale Embedded SRIO Controller support" 783 depends on RAPIDIO && HAS_RAPIDIO 784 default "n" 785 ---help--- 786 Include support for RapidIO controller on Freescale embedded 787 processors (MPC8548, MPC8641, etc). 788 789source "drivers/rapidio/Kconfig" 790 791endmenu 792 793menu "Advanced setup" 794 depends on PPC32 795 796config ADVANCED_OPTIONS 797 bool "Prompt for advanced kernel configuration options" 798 help 799 This option will enable prompting for a variety of advanced kernel 800 configuration options. These options can cause the kernel to not 801 work if they are set incorrectly, but can be used to optimize certain 802 aspects of kernel memory management. 803 804 Unless you know what you are doing, say N here. 805 806comment "Default settings for advanced configuration options are used" 807 depends on !ADVANCED_OPTIONS 808 809config LOWMEM_SIZE_BOOL 810 bool "Set maximum low memory" 811 depends on ADVANCED_OPTIONS 812 help 813 This option allows you to set the maximum amount of memory which 814 will be used as "low memory", that is, memory which the kernel can 815 access directly, without having to set up a kernel virtual mapping. 816 This can be useful in optimizing the layout of kernel virtual 817 memory. 818 819 Say N here unless you know what you are doing. 820 821config LOWMEM_SIZE 822 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 823 default "0x30000000" 824 825config LOWMEM_CAM_NUM_BOOL 826 bool "Set number of CAMs to use to map low memory" 827 depends on ADVANCED_OPTIONS && FSL_BOOKE 828 help 829 This option allows you to set the maximum number of CAM slots that 830 will be used to map low memory. There are a limited number of slots 831 available and even more limited number that will fit in the L1 MMU. 832 However, using more entries will allow mapping more low memory. This 833 can be useful in optimizing the layout of kernel virtual memory. 834 835 Say N here unless you know what you are doing. 836 837config LOWMEM_CAM_NUM 838 depends on FSL_BOOKE 839 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 840 default 3 841 842config RELOCATABLE 843 bool "Build a relocatable kernel (EXPERIMENTAL)" 844 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 845 help 846 This builds a kernel image that is capable of running at the 847 location the kernel is loaded at (some alignment restrictions may 848 exist). 849 850 One use is for the kexec on panic case where the recovery kernel 851 must live at a different physical address than the primary 852 kernel. 853 854 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 855 it has been loaded at and the compile time physical addresses 856 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 857 setting can still be useful to bootwrappers that need to know the 858 load location of the kernel (eg. u-boot/mkimage). 859 860config PAGE_OFFSET_BOOL 861 bool "Set custom page offset address" 862 depends on ADVANCED_OPTIONS 863 help 864 This option allows you to set the kernel virtual address at which 865 the kernel will map low memory. This can be useful in optimizing 866 the virtual memory layout of the system. 867 868 Say N here unless you know what you are doing. 869 870config PAGE_OFFSET 871 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 872 default "0xc0000000" 873 874config KERNEL_START_BOOL 875 bool "Set custom kernel base address" 876 depends on ADVANCED_OPTIONS 877 help 878 This option allows you to set the kernel virtual address at which 879 the kernel will be loaded. Normally this should match PAGE_OFFSET 880 however there are times (like kdump) that one might not want them 881 to be the same. 882 883 Say N here unless you know what you are doing. 884 885config KERNEL_START 886 hex "Virtual address of kernel base" if KERNEL_START_BOOL 887 default PAGE_OFFSET if PAGE_OFFSET_BOOL 888 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE 889 default "0xc0000000" 890 891config PHYSICAL_START_BOOL 892 bool "Set physical address where the kernel is loaded" 893 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 894 help 895 This gives the physical address where the kernel is loaded. 896 897 Say N here unless you know what you are doing. 898 899config PHYSICAL_START 900 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 901 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE 902 default "0x00000000" 903 904config PHYSICAL_ALIGN 905 hex 906 default "0x04000000" if FSL_BOOKE 907 help 908 This value puts the alignment restrictions on physical address 909 where kernel is loaded and run from. Kernel is compiled for an 910 address which meets above alignment restriction. 911 912config TASK_SIZE_BOOL 913 bool "Set custom user task size" 914 depends on ADVANCED_OPTIONS 915 help 916 This option allows you to set the amount of virtual address space 917 allocated to user tasks. This can be useful in optimizing the 918 virtual memory layout of the system. 919 920 Say N here unless you know what you are doing. 921 922config TASK_SIZE 923 hex "Size of user task space" if TASK_SIZE_BOOL 924 default "0x80000000" if PPC_PREP || PPC_8xx 925 default "0xc0000000" 926 927config CONSISTENT_SIZE_BOOL 928 bool "Set custom consistent memory pool size" 929 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 930 help 931 This option allows you to set the size of the 932 consistent memory pool. This pool of virtual memory 933 is used to make consistent memory allocations. 934 935config CONSISTENT_SIZE 936 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 937 default "0x00200000" if NOT_COHERENT_CACHE 938 939config PIN_TLB 940 bool "Pinned Kernel TLBs (860 ONLY)" 941 depends on ADVANCED_OPTIONS && 8xx 942endmenu 943 944if PPC64 945config RELOCATABLE 946 bool "Build a relocatable kernel" 947 help 948 This builds a kernel image that is capable of running anywhere 949 in the RMA (real memory area) at any 16k-aligned base address. 950 The kernel is linked as a position-independent executable (PIE) 951 and contains dynamic relocations which are processed early 952 in the bootup process. 953 954 One use is for the kexec on panic case where the recovery kernel 955 must live at a different physical address than the primary 956 kernel. 957 958config PAGE_OFFSET 959 hex 960 default "0xc000000000000000" 961config KERNEL_START 962 hex 963 default "0xc000000000000000" 964config PHYSICAL_START 965 hex 966 default "0x00000000" 967endif 968 969source "net/Kconfig" 970 971source "drivers/Kconfig" 972 973source "fs/Kconfig" 974 975source "arch/powerpc/sysdev/qe_lib/Kconfig" 976 977source "lib/Kconfig" 978 979source "arch/powerpc/Kconfig.debug" 980 981source "security/Kconfig" 982 983config KEYS_COMPAT 984 bool 985 depends on COMPAT && KEYS 986 default y 987 988source "crypto/Kconfig" 989 990config PPC_CLOCK 991 bool 992 default n 993 select HAVE_CLK 994 995config PPC_LIB_RHEAP 996 bool 997 998source "arch/powerpc/kvm/Kconfig" 999