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