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 HAVE_SETUP_PER_CPU_AREA 31 def_bool PPC64 32 33config NEED_PER_CPU_EMBED_FIRST_CHUNK 34 def_bool PPC64 35 36config NR_IRQS 37 int "Number of virtual interrupt numbers" 38 range 32 32768 39 default "512" 40 help 41 This defines the number of virtual interrupt numbers the kernel 42 can manage. Virtual interrupt numbers are what you see in 43 /proc/interrupts. If you configure your system to have too few, 44 drivers will fail to load or worse - handle with care. 45 46config STACKTRACE_SUPPORT 47 bool 48 default y 49 50config HAVE_LATENCYTOP_SUPPORT 51 def_bool y 52 53config TRACE_IRQFLAGS_SUPPORT 54 bool 55 default y 56 57config LOCKDEP_SUPPORT 58 bool 59 default y 60 61config RWSEM_GENERIC_SPINLOCK 62 bool 63 64config RWSEM_XCHGADD_ALGORITHM 65 bool 66 default y 67 68config GENERIC_LOCKBREAK 69 bool 70 default y 71 depends on SMP && PREEMPT 72 73config ARCH_HAS_ILOG2_U32 74 bool 75 default y 76 77config ARCH_HAS_ILOG2_U64 78 bool 79 default y if 64BIT 80 81config GENERIC_HWEIGHT 82 bool 83 default y 84 85config GENERIC_GPIO 86 bool 87 help 88 Generic GPIO API support 89 90config ARCH_NO_VIRT_TO_BUS 91 def_bool PPC64 92 93config PPC 94 bool 95 default y 96 select OF 97 select OF_EARLY_FLATTREE 98 select HAVE_FTRACE_MCOUNT_RECORD 99 select HAVE_DYNAMIC_FTRACE 100 select HAVE_FUNCTION_TRACER 101 select HAVE_FUNCTION_GRAPH_TRACER 102 select SYSCTL_EXCEPTION_TRACE 103 select ARCH_WANT_OPTIONAL_GPIOLIB 104 select HAVE_IDE 105 select HAVE_IOREMAP_PROT 106 select HAVE_EFFICIENT_UNALIGNED_ACCESS 107 select HAVE_KPROBES 108 select HAVE_ARCH_KGDB 109 select HAVE_KRETPROBES 110 select HAVE_ARCH_TRACEHOOK 111 select HAVE_MEMBLOCK 112 select HAVE_MEMBLOCK_NODE_MAP 113 select HAVE_DMA_ATTRS 114 select HAVE_DMA_API_DEBUG 115 select USE_GENERIC_SMP_HELPERS if SMP 116 select HAVE_OPROFILE 117 select HAVE_DEBUG_KMEMLEAK 118 select HAVE_SYSCALL_WRAPPERS if PPC64 119 select GENERIC_ATOMIC64 if PPC32 120 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 121 select HAVE_PERF_EVENTS 122 select HAVE_REGS_AND_STACK_ACCESS_API 123 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 124 select HAVE_GENERIC_HARDIRQS 125 select ARCH_WANT_IPC_PARSE_VERSION 126 select SPARSE_IRQ 127 select IRQ_DOMAIN 128 select GENERIC_IRQ_SHOW 129 select GENERIC_IRQ_SHOW_LEVEL 130 select IRQ_FORCED_THREADING 131 select HAVE_RCU_TABLE_FREE if SMP 132 select HAVE_SYSCALL_TRACEPOINTS 133 select HAVE_BPF_JIT if PPC64 134 select HAVE_ARCH_JUMP_LABEL 135 select ARCH_HAVE_NMI_SAFE_CMPXCHG 136 select GENERIC_SMP_IDLE_THREAD 137 select GENERIC_CMOS_UPDATE 138 select GENERIC_TIME_VSYSCALL_OLD 139 select GENERIC_CLOCKEVENTS 140 select GENERIC_STRNCPY_FROM_USER 141 select GENERIC_STRNLEN_USER 142 select HAVE_MOD_ARCH_SPECIFIC 143 select MODULES_USE_ELF_RELA 144 select CLONE_BACKWARDS 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 select ARCH_WANT_OLD_COMPAT_IPC 155 156config SYSVIPC_COMPAT 157 bool 158 depends on COMPAT && SYSVIPC 159 default y 160 161# All PPC32s use generic nvram driver through ppc_md 162config GENERIC_NVRAM 163 bool 164 default y if PPC32 165 166config SCHED_OMIT_FRAME_POINTER 167 bool 168 default y 169 170config ARCH_MAY_HAVE_PC_FDC 171 bool 172 default !PPC_PSERIES || PCI 173 174config PPC_OF 175 def_bool y 176 177config PPC_UDBG_16550 178 bool 179 default n 180 181config GENERIC_TBSYNC 182 bool 183 default y if PPC32 && SMP 184 default n 185 186config AUDIT_ARCH 187 bool 188 default y 189 190config GENERIC_BUG 191 bool 192 default y 193 depends on BUG 194 195config SYS_SUPPORTS_APM_EMULATION 196 default y if PMAC_APM_EMU 197 bool 198 199config EPAPR_BOOT 200 bool 201 help 202 Used to allow a board to specify it wants an ePAPR compliant wrapper. 203 default n 204 205config DEFAULT_UIMAGE 206 bool 207 help 208 Used to allow a board to specify it wants a uImage built by default 209 default n 210 211config REDBOOT 212 bool 213 214config ARCH_HIBERNATION_POSSIBLE 215 bool 216 default y 217 218config ARCH_SUSPEND_POSSIBLE 219 def_bool y 220 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 221 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 222 || 44x || 40x 223 224config PPC_DCR_NATIVE 225 bool 226 default n 227 228config PPC_DCR_MMIO 229 bool 230 default n 231 232config PPC_DCR 233 bool 234 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 235 default y 236 237config PPC_OF_PLATFORM_PCI 238 bool 239 depends on PCI 240 depends on PPC64 # not supported on 32 bits yet 241 default n 242 243config ARCH_SUPPORTS_DEBUG_PAGEALLOC 244 def_bool y 245 246config ARCH_SUPPORTS_UPROBES 247 def_bool y 248 249config PPC_ADV_DEBUG_REGS 250 bool 251 depends on 40x || BOOKE 252 default y 253 254config PPC_ADV_DEBUG_IACS 255 int 256 depends on PPC_ADV_DEBUG_REGS 257 default 4 if 44x 258 default 2 259 260config PPC_ADV_DEBUG_DACS 261 int 262 depends on PPC_ADV_DEBUG_REGS 263 default 2 264 265config PPC_ADV_DEBUG_DVCS 266 int 267 depends on PPC_ADV_DEBUG_REGS 268 default 2 if 44x 269 default 0 270 271config PPC_ADV_DEBUG_DAC_RANGE 272 bool 273 depends on PPC_ADV_DEBUG_REGS && 44x 274 default y 275 276source "init/Kconfig" 277 278source "kernel/Kconfig.freezer" 279 280source "arch/powerpc/sysdev/Kconfig" 281source "arch/powerpc/platforms/Kconfig" 282 283menu "Kernel options" 284 285config HIGHMEM 286 bool "High memory support" 287 depends on PPC32 288 289source kernel/Kconfig.hz 290source kernel/Kconfig.preempt 291source "fs/Kconfig.binfmt" 292 293config HUGETLB_PAGE_SIZE_VARIABLE 294 bool 295 depends on HUGETLB_PAGE 296 default y 297 298config MATH_EMULATION 299 bool "Math emulation" 300 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 301 ---help--- 302 Some PowerPC chips designed for embedded applications do not have 303 a floating-point unit and therefore do not implement the 304 floating-point instructions in the PowerPC instruction set. If you 305 say Y here, the kernel will include code to emulate a floating-point 306 unit, which will allow programs that use floating-point 307 instructions to run. 308 309config 8XX_MINIMAL_FPEMU 310 bool "Minimal math emulation for 8xx" 311 depends on 8xx && !MATH_EMULATION 312 help 313 Older arch/ppc kernels still emulated a few floating point 314 instructions such as load and store, even when full math 315 emulation is disabled. Say "Y" here if you want to preserve 316 this behavior. 317 318 It is recommended that you build a soft-float userspace instead. 319 320config IOMMU_HELPER 321 def_bool PPC64 322 323config SWIOTLB 324 bool "SWIOTLB support" 325 default n 326 select IOMMU_HELPER 327 ---help--- 328 Support for IO bounce buffering for systems without an IOMMU. 329 This allows us to DMA to the full physical address space on 330 platforms where the size of a physical address is larger 331 than the bus address. Not all platforms support this. 332 333config HOTPLUG_CPU 334 bool "Support for enabling/disabling CPUs" 335 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || \ 336 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC)) 337 ---help--- 338 Say Y here to be able to disable and re-enable individual 339 CPUs at runtime on SMP machines. 340 341 Say N if you are unsure. 342 343config ARCH_CPU_PROBE_RELEASE 344 def_bool y 345 depends on HOTPLUG_CPU 346 347config ARCH_ENABLE_MEMORY_HOTPLUG 348 def_bool y 349 350config ARCH_HAS_WALK_MEMORY 351 def_bool y 352 353config ARCH_ENABLE_MEMORY_HOTREMOVE 354 def_bool y 355 356config KEXEC 357 bool "kexec system call (EXPERIMENTAL)" 358 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) && EXPERIMENTAL 359 help 360 kexec is a system call that implements the ability to shutdown your 361 current kernel, and to start another kernel. It is like a reboot 362 but it is independent of the system firmware. And like a reboot 363 you can start any kernel with it, not just Linux. 364 365 The name comes from the similarity to the exec system call. 366 367 It is an ongoing process to be certain the hardware in a machine 368 is properly shutdown, so do not be surprised if this code does not 369 initially work for you. It may help to enable device hotplugging 370 support. As of this writing the exact hardware interface is 371 strongly in flux, so no good recommendation can be made. 372 373config CRASH_DUMP 374 bool "Build a kdump crash kernel" 375 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 376 select RELOCATABLE if PPC64 || 44x 377 select DYNAMIC_MEMSTART if FSL_BOOKE 378 help 379 Build a kernel suitable for use as a kdump capture kernel. 380 The same kernel binary can be used as production kernel and dump 381 capture kernel. 382 383config FA_DUMP 384 bool "Firmware-assisted dump" 385 depends on PPC64 && PPC_RTAS && CRASH_DUMP 386 help 387 A robust mechanism to get reliable kernel crash dump with 388 assistance from firmware. This approach does not use kexec, 389 instead firmware assists in booting the kdump kernel 390 while preserving memory contents. Firmware-assisted dump 391 is meant to be a kdump replacement offering robustness and 392 speed not possible without system firmware assistance. 393 394 If unsure, say "N" 395 396config IRQ_ALL_CPUS 397 bool "Distribute interrupts on all CPUs by default" 398 depends on SMP && !MV64360 399 help 400 This option gives the kernel permission to distribute IRQs across 401 multiple CPUs. Saying N here will route all IRQs to the first 402 CPU. Generally saying Y is safe, although some problems have been 403 reported with SMP Power Macintoshes with this option enabled. 404 405config NUMA 406 bool "NUMA support" 407 depends on PPC64 408 default y if SMP && PPC_PSERIES 409 410config NODES_SHIFT 411 int 412 default "8" if PPC64 413 default "4" 414 depends on NEED_MULTIPLE_NODES 415 416config MAX_ACTIVE_REGIONS 417 int 418 default "256" if PPC64 419 default "32" 420 421config ARCH_SELECT_MEMORY_MODEL 422 def_bool y 423 depends on PPC64 424 425config ARCH_FLATMEM_ENABLE 426 def_bool y 427 depends on (PPC64 && !NUMA) || PPC32 428 429config ARCH_SPARSEMEM_ENABLE 430 def_bool y 431 depends on PPC64 432 select SPARSEMEM_VMEMMAP_ENABLE 433 434config ARCH_SPARSEMEM_DEFAULT 435 def_bool y 436 depends on (SMP && PPC_PSERIES) || PPC_PS3 437 438config SYS_SUPPORTS_HUGETLBFS 439 bool 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 PPC_DENORMALISATION 569 bool "PowerPC denormalisation exception handling" 570 depends on PPC_BOOK3S_64 571 default "n" 572 ---help--- 573 Add support for handling denormalisation of single precision 574 values. Useful for bare metal only. If unsure say Y here. 575 576config CMDLINE_BOOL 577 bool "Default bootloader kernel arguments" 578 579config CMDLINE 580 string "Initial kernel command string" 581 depends on CMDLINE_BOOL 582 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 583 help 584 On some platforms, there is currently no way for the boot loader to 585 pass arguments to the kernel. For these platforms, you can supply 586 some command-line options at build time by entering them here. In 587 most cases you will need to specify the root device here. 588 589config EXTRA_TARGETS 590 string "Additional default image types" 591 help 592 List additional targets to be built by the bootwrapper here (separated 593 by spaces). This is useful for targets that depend of device tree 594 files in the .dts directory. 595 596 Targets in this list will be build as part of the default build 597 target, or when the user does a 'make zImage' or a 598 'make zImage.initrd'. 599 600 If unsure, leave blank 601 602config ARCH_WANTS_FREEZER_CONTROL 603 def_bool y 604 depends on ADB_PMU 605 606source kernel/power/Kconfig 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 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 select HAVE_CAN_FLEXCAN if NET && CAN 674 select PPC_CLOCK 675 676config FSL_PCI 677 bool 678 select PPC_INDIRECT_PCI 679 select PCI_QUIRKS 680 681config FSL_PMC 682 bool 683 default y 684 depends on SUSPEND && (PPC_85xx || PPC_86xx) 685 help 686 Freescale MPC85xx/MPC86xx power management controller support 687 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 688 689config PPC4xx_CPM 690 bool 691 default y 692 depends on SUSPEND && (44x || 40x) 693 help 694 PPC4xx Clock Power Management (CPM) support (suspend/resume). 695 It also enables support for two different idle states (idle-wait 696 and idle-doze). 697 698config 4xx_SOC 699 bool 700 701config FSL_LBC 702 bool "Freescale Local Bus support" 703 depends on FSL_SOC 704 help 705 Enables reporting of errors from the Freescale local bus 706 controller. Also contains some common code used by 707 drivers for specific local bus peripherals. 708 709config FSL_IFC 710 bool 711 depends on FSL_SOC 712 713config FSL_GTM 714 bool 715 depends on PPC_83xx || QUICC_ENGINE || CPM2 716 help 717 Freescale General-purpose Timers support 718 719# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 720config MCA 721 bool 722 723# Platforms that what PCI turned unconditionally just do select PCI 724# in their config node. Platforms that want to choose at config 725# time should select PPC_PCI_CHOICE 726config PPC_PCI_CHOICE 727 bool 728 729config PCI 730 bool "PCI support" if PPC_PCI_CHOICE 731 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 732 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 733 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx 734 default PCI_QSPAN if !4xx && !CPM2 && 8xx 735 select ARCH_SUPPORTS_MSI 736 select GENERIC_PCI_IOMAP 737 help 738 Find out whether your system includes a PCI bus. PCI is the name of 739 a bus system, i.e. the way the CPU talks to the other stuff inside 740 your box. If you say Y here, the kernel will include drivers and 741 infrastructure code to support PCI bus devices. 742 743config PCI_DOMAINS 744 def_bool PCI 745 746config PCI_SYSCALL 747 def_bool PCI 748 749config PCI_QSPAN 750 bool "QSpan PCI" 751 depends on !4xx && !CPM2 && 8xx 752 select PPC_I8259 753 help 754 Say Y here if you have a system based on a Motorola 8xx-series 755 embedded processor with a QSPAN PCI interface, otherwise say N. 756 757config PCI_8260 758 bool 759 depends on PCI && 8260 760 select PPC_INDIRECT_PCI 761 default y 762 763config 8260_PCI9 764 bool "Enable workaround for MPC826x erratum PCI 9" 765 depends on PCI_8260 && !8272 766 default y 767 768source "drivers/pci/pcie/Kconfig" 769 770source "drivers/pci/Kconfig" 771 772source "drivers/pcmcia/Kconfig" 773 774source "drivers/pci/hotplug/Kconfig" 775 776config HAS_RAPIDIO 777 bool 778 default n 779 780config RAPIDIO 781 bool "RapidIO support" 782 depends on HAS_RAPIDIO || PCI 783 help 784 If you say Y here, the kernel will include drivers and 785 infrastructure code to support RapidIO interconnect devices. 786 787config FSL_RIO 788 bool "Freescale Embedded SRIO Controller support" 789 depends on RAPIDIO && HAS_RAPIDIO 790 default "n" 791 ---help--- 792 Include support for RapidIO controller on Freescale embedded 793 processors (MPC8548, MPC8641, etc). 794 795source "drivers/rapidio/Kconfig" 796 797endmenu 798 799config NONSTATIC_KERNEL 800 bool 801 default n 802 803menu "Advanced setup" 804 depends on PPC32 805 806config ADVANCED_OPTIONS 807 bool "Prompt for advanced kernel configuration options" 808 help 809 This option will enable prompting for a variety of advanced kernel 810 configuration options. These options can cause the kernel to not 811 work if they are set incorrectly, but can be used to optimize certain 812 aspects of kernel memory management. 813 814 Unless you know what you are doing, say N here. 815 816comment "Default settings for advanced configuration options are used" 817 depends on !ADVANCED_OPTIONS 818 819config LOWMEM_SIZE_BOOL 820 bool "Set maximum low memory" 821 depends on ADVANCED_OPTIONS 822 help 823 This option allows you to set the maximum amount of memory which 824 will be used as "low memory", that is, memory which the kernel can 825 access directly, without having to set up a kernel virtual mapping. 826 This can be useful in optimizing the layout of kernel virtual 827 memory. 828 829 Say N here unless you know what you are doing. 830 831config LOWMEM_SIZE 832 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 833 default "0x30000000" 834 835config LOWMEM_CAM_NUM_BOOL 836 bool "Set number of CAMs to use to map low memory" 837 depends on ADVANCED_OPTIONS && FSL_BOOKE 838 help 839 This option allows you to set the maximum number of CAM slots that 840 will be used to map low memory. There are a limited number of slots 841 available and even more limited number that will fit in the L1 MMU. 842 However, using more entries will allow mapping more low memory. This 843 can be useful in optimizing the layout of kernel virtual memory. 844 845 Say N here unless you know what you are doing. 846 847config LOWMEM_CAM_NUM 848 depends on FSL_BOOKE 849 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 850 default 3 851 852config DYNAMIC_MEMSTART 853 bool "Enable page aligned dynamic load address for kernel (EXPERIMENTAL)" 854 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 855 select NONSTATIC_KERNEL 856 help 857 This option enables the kernel to be loaded at any page aligned 858 physical address. The kernel creates a mapping from KERNELBASE to 859 the address where the kernel is loaded. The page size here implies 860 the TLB page size of the mapping for kernel on the particular platform. 861 Please refer to the init code for finding the TLB page size. 862 863 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 864 kernel image, where the only restriction is the page aligned kernel 865 load address. When this option is enabled, the compile time physical 866 address CONFIG_PHYSICAL_START is ignored. 867 868 This option is overridden by CONFIG_RELOCATABLE 869 870config RELOCATABLE 871 bool "Build a relocatable kernel (EXPERIMENTAL)" 872 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && 44x 873 select NONSTATIC_KERNEL 874 help 875 This builds a kernel image that is capable of running at the 876 location the kernel is loaded at, without any alignment restrictions. 877 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. 878 879 One use is for the kexec on panic case where the recovery kernel 880 must live at a different physical address than the primary 881 kernel. 882 883 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 884 it has been loaded at and the compile time physical addresses 885 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 886 setting can still be useful to bootwrappers that need to know the 887 load address of the kernel (eg. u-boot/mkimage). 888 889config RELOCATABLE_PPC32 890 def_bool y 891 depends on PPC32 && RELOCATABLE 892 893config PAGE_OFFSET_BOOL 894 bool "Set custom page offset address" 895 depends on ADVANCED_OPTIONS 896 help 897 This option allows you to set the kernel virtual address at which 898 the kernel will map low memory. This can be useful in optimizing 899 the virtual memory layout of the system. 900 901 Say N here unless you know what you are doing. 902 903config PAGE_OFFSET 904 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 905 default "0xc0000000" 906 907config KERNEL_START_BOOL 908 bool "Set custom kernel base address" 909 depends on ADVANCED_OPTIONS 910 help 911 This option allows you to set the kernel virtual address at which 912 the kernel will be loaded. Normally this should match PAGE_OFFSET 913 however there are times (like kdump) that one might not want them 914 to be the same. 915 916 Say N here unless you know what you are doing. 917 918config KERNEL_START 919 hex "Virtual address of kernel base" if KERNEL_START_BOOL 920 default PAGE_OFFSET if PAGE_OFFSET_BOOL 921 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 922 default "0xc0000000" 923 924config PHYSICAL_START_BOOL 925 bool "Set physical address where the kernel is loaded" 926 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 927 help 928 This gives the physical address where the kernel is loaded. 929 930 Say N here unless you know what you are doing. 931 932config PHYSICAL_START 933 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 934 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 935 default "0x00000000" 936 937config PHYSICAL_ALIGN 938 hex 939 default "0x04000000" if FSL_BOOKE 940 help 941 This value puts the alignment restrictions on physical address 942 where kernel is loaded and run from. Kernel is compiled for an 943 address which meets above alignment restriction. 944 945config TASK_SIZE_BOOL 946 bool "Set custom user task size" 947 depends on ADVANCED_OPTIONS 948 help 949 This option allows you to set the amount of virtual address space 950 allocated to user tasks. This can be useful in optimizing the 951 virtual memory layout of the system. 952 953 Say N here unless you know what you are doing. 954 955config TASK_SIZE 956 hex "Size of user task space" if TASK_SIZE_BOOL 957 default "0x80000000" if PPC_PREP || PPC_8xx 958 default "0xc0000000" 959 960config CONSISTENT_SIZE_BOOL 961 bool "Set custom consistent memory pool size" 962 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 963 help 964 This option allows you to set the size of the 965 consistent memory pool. This pool of virtual memory 966 is used to make consistent memory allocations. 967 968config CONSISTENT_SIZE 969 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 970 default "0x00200000" if NOT_COHERENT_CACHE 971 972config PIN_TLB 973 bool "Pinned Kernel TLBs (860 ONLY)" 974 depends on ADVANCED_OPTIONS && 8xx 975endmenu 976 977if PPC64 978config RELOCATABLE 979 bool "Build a relocatable kernel" 980 select NONSTATIC_KERNEL 981 help 982 This builds a kernel image that is capable of running anywhere 983 in the RMA (real memory area) at any 16k-aligned base address. 984 The kernel is linked as a position-independent executable (PIE) 985 and contains dynamic relocations which are processed early 986 in the bootup process. 987 988 One use is for the kexec on panic case where the recovery kernel 989 must live at a different physical address than the primary 990 kernel. 991 992config PAGE_OFFSET 993 hex 994 default "0xc000000000000000" 995config KERNEL_START 996 hex 997 default "0xc000000000000000" 998config PHYSICAL_START 999 hex 1000 default "0x00000000" 1001endif 1002 1003source "net/Kconfig" 1004 1005source "drivers/Kconfig" 1006 1007source "fs/Kconfig" 1008 1009source "arch/powerpc/sysdev/qe_lib/Kconfig" 1010 1011source "lib/Kconfig" 1012 1013source "arch/powerpc/Kconfig.debug" 1014 1015source "security/Kconfig" 1016 1017config KEYS_COMPAT 1018 bool 1019 depends on COMPAT && KEYS 1020 default y 1021 1022source "crypto/Kconfig" 1023 1024config PPC_CLOCK 1025 bool 1026 default n 1027 select HAVE_CLK 1028 1029config PPC_LIB_RHEAP 1030 bool 1031 1032source "arch/powerpc/kvm/Kconfig" 1033