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