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