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 ARCH_HAS_CPU_IDLE_WAIT 91 bool 92 default y 93 94config GENERIC_HWEIGHT 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_MEMBLOCK_NODE_MAP 125 select HAVE_DMA_ATTRS 126 select HAVE_DMA_API_DEBUG 127 select USE_GENERIC_SMP_HELPERS if SMP 128 select HAVE_OPROFILE 129 select HAVE_SYSCALL_WRAPPERS if PPC64 130 select GENERIC_ATOMIC64 if PPC32 131 select HAVE_IRQ_WORK 132 select HAVE_PERF_EVENTS 133 select HAVE_REGS_AND_STACK_ACCESS_API 134 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 135 select HAVE_GENERIC_HARDIRQS 136 select HAVE_SPARSE_IRQ 137 select IRQ_PER_CPU 138 select GENERIC_IRQ_SHOW 139 select GENERIC_IRQ_SHOW_LEVEL 140 select IRQ_FORCED_THREADING 141 select HAVE_RCU_TABLE_FREE if SMP 142 select HAVE_SYSCALL_TRACEPOINTS 143 select HAVE_BPF_JIT if (PPC64 && NET) 144 select HAVE_ARCH_JUMP_LABEL 145 select ARCH_HAVE_NMI_SAFE_CMPXCHG 146 147config EARLY_PRINTK 148 bool 149 default y 150 151config COMPAT 152 bool 153 default y if PPC64 154 select COMPAT_BINFMT_ELF 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 && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x 222 223config PPC_DCR_NATIVE 224 bool 225 default n 226 227config PPC_DCR_MMIO 228 bool 229 default n 230 231config PPC_DCR 232 bool 233 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 234 default y 235 236config PPC_OF_PLATFORM_PCI 237 bool 238 depends on PCI 239 depends on PPC64 # not supported on 32 bits yet 240 default n 241 242config ARCH_SUPPORTS_DEBUG_PAGEALLOC 243 def_bool y 244 245config PPC_ADV_DEBUG_REGS 246 bool 247 depends on 40x || BOOKE 248 default y 249 250config PPC_ADV_DEBUG_IACS 251 int 252 depends on PPC_ADV_DEBUG_REGS 253 default 4 if 44x 254 default 2 255 256config PPC_ADV_DEBUG_DACS 257 int 258 depends on PPC_ADV_DEBUG_REGS 259 default 2 260 261config PPC_ADV_DEBUG_DVCS 262 int 263 depends on PPC_ADV_DEBUG_REGS 264 default 2 if 44x 265 default 0 266 267config PPC_ADV_DEBUG_DAC_RANGE 268 bool 269 depends on PPC_ADV_DEBUG_REGS && 44x 270 default y 271 272source "init/Kconfig" 273 274source "kernel/Kconfig.freezer" 275 276source "arch/powerpc/sysdev/Kconfig" 277source "arch/powerpc/platforms/Kconfig" 278 279menu "Kernel options" 280 281config HIGHMEM 282 bool "High memory support" 283 depends on PPC32 284 285source kernel/time/Kconfig 286source kernel/Kconfig.hz 287source kernel/Kconfig.preempt 288source "fs/Kconfig.binfmt" 289 290config HUGETLB_PAGE_SIZE_VARIABLE 291 bool 292 depends on HUGETLB_PAGE 293 default y 294 295config MATH_EMULATION 296 bool "Math emulation" 297 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 298 ---help--- 299 Some PowerPC chips designed for embedded applications do not have 300 a floating-point unit and therefore do not implement the 301 floating-point instructions in the PowerPC instruction set. If you 302 say Y here, the kernel will include code to emulate a floating-point 303 unit, which will allow programs that use floating-point 304 instructions to run. 305 306config 8XX_MINIMAL_FPEMU 307 bool "Minimal math emulation for 8xx" 308 depends on 8xx && !MATH_EMULATION 309 help 310 Older arch/ppc kernels still emulated a few floating point 311 instructions such as load and store, even when full math 312 emulation is disabled. Say "Y" here if you want to preserve 313 this behavior. 314 315 It is recommended that you build a soft-float userspace instead. 316 317config IOMMU_HELPER 318 def_bool PPC64 319 320config SWIOTLB 321 bool "SWIOTLB support" 322 default n 323 select IOMMU_HELPER 324 ---help--- 325 Support for IO bounce buffering for systems without an IOMMU. 326 This allows us to DMA to the full physical address space on 327 platforms where the size of a physical address is larger 328 than the bus address. Not all platforms support this. 329 330config HOTPLUG_CPU 331 bool "Support for enabling/disabling CPUs" 332 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV) 333 ---help--- 334 Say Y here to be able to disable and re-enable individual 335 CPUs at runtime on SMP machines. 336 337 Say N if you are unsure. 338 339config ARCH_CPU_PROBE_RELEASE 340 def_bool y 341 depends on HOTPLUG_CPU 342 343config ARCH_ENABLE_MEMORY_HOTPLUG 344 def_bool y 345 346config ARCH_HAS_WALK_MEMORY 347 def_bool y 348 349config ARCH_ENABLE_MEMORY_HOTREMOVE 350 def_bool y 351 352config KEXEC 353 bool "kexec system call (EXPERIMENTAL)" 354 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP && !PPC_47x)) && EXPERIMENTAL 355 help 356 kexec is a system call that implements the ability to shutdown your 357 current kernel, and to start another kernel. It is like a reboot 358 but it is independent of the system firmware. And like a reboot 359 you can start any kernel with it, not just Linux. 360 361 The name comes from the similarity to the exec system call. 362 363 It is an ongoing process to be certain the hardware in a machine 364 is properly shutdown, so do not be surprised if this code does not 365 initially work for you. It may help to enable device hotplugging 366 support. As of this writing the exact hardware interface is 367 strongly in flux, so no good recommendation can be made. 368 369config CRASH_DUMP 370 bool "Build a kdump crash kernel" 371 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP && !PPC_47x) 372 select RELOCATABLE if PPC64 || 44x 373 select DYNAMIC_MEMSTART if FSL_BOOKE 374 help 375 Build a kernel suitable for use as a kdump capture kernel. 376 The same kernel binary can be used as production kernel and dump 377 capture kernel. 378 379config PHYP_DUMP 380 bool "Hypervisor-assisted dump (EXPERIMENTAL)" 381 depends on PPC_PSERIES && EXPERIMENTAL 382 help 383 Hypervisor-assisted dump is meant to be a kdump replacement 384 offering robustness and speed not possible without system 385 hypervisor assistance. 386 387 If unsure, say "N" 388 389config FA_DUMP 390 bool "Firmware-assisted dump" 391 depends on PPC64 && PPC_RTAS && CRASH_DUMP 392 help 393 A robust mechanism to get reliable kernel crash dump with 394 assistance from firmware. This approach does not use kexec, 395 instead firmware assists in booting the kdump kernel 396 while preserving memory contents. Firmware-assisted dump 397 is meant to be a kdump replacement offering robustness and 398 speed not possible without system firmware assistance. 399 400 If unsure, say "N" 401 402config IRQ_ALL_CPUS 403 bool "Distribute interrupts on all CPUs by default" 404 depends on SMP && !MV64360 405 help 406 This option gives the kernel permission to distribute IRQs across 407 multiple CPUs. Saying N here will route all IRQs to the first 408 CPU. Generally saying Y is safe, although some problems have been 409 reported with SMP Power Macintoshes with this option enabled. 410 411config NUMA 412 bool "NUMA support" 413 depends on PPC64 414 default y if SMP && PPC_PSERIES 415 416config NODES_SHIFT 417 int 418 default "8" if PPC64 419 default "4" 420 depends on NEED_MULTIPLE_NODES 421 422config MAX_ACTIVE_REGIONS 423 int 424 default "256" if PPC64 425 default "32" 426 427config ARCH_SELECT_MEMORY_MODEL 428 def_bool y 429 depends on PPC64 430 431config ARCH_FLATMEM_ENABLE 432 def_bool y 433 depends on (PPC64 && !NUMA) || PPC32 434 435config ARCH_SPARSEMEM_ENABLE 436 def_bool y 437 depends on PPC64 438 select SPARSEMEM_VMEMMAP_ENABLE 439 440config ARCH_SPARSEMEM_DEFAULT 441 def_bool y 442 depends on (SMP && PPC_PSERIES) || PPC_PS3 443 444config SYS_SUPPORTS_HUGETLBFS 445 bool 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 600config ARCH_WANTS_FREEZER_CONTROL 601 def_bool y 602 depends on ADB_PMU 603 604source kernel/power/Kconfig 605 606config SECCOMP 607 bool "Enable seccomp to safely compute untrusted bytecode" 608 depends on PROC_FS 609 default y 610 help 611 This kernel feature is useful for number crunching applications 612 that may need to compute untrusted bytecode during their 613 execution. By using pipes or other transports made available to 614 the process as file descriptors supporting the read/write 615 syscalls, it's possible to isolate those applications in 616 their own address space using seccomp. Once seccomp is 617 enabled via /proc/<pid>/seccomp, it cannot be disabled 618 and the task is only allowed to execute a few safe syscalls 619 defined by each seccomp mode. 620 621 If unsure, say Y. Only embedded should say N here. 622 623endmenu 624 625config ISA_DMA_API 626 bool 627 default !PPC_ISERIES || PCI 628 629menu "Bus options" 630 631config ISA 632 bool "Support for ISA-bus hardware" 633 depends on PPC_PREP || PPC_CHRP 634 select PPC_I8259 635 help 636 Find out whether you have ISA slots on your motherboard. ISA is the 637 name of a bus system, i.e. the way the CPU talks to the other stuff 638 inside your box. If you have an Apple machine, say N here; if you 639 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 640 you have an embedded board, consult your board documentation. 641 642config ZONE_DMA 643 bool 644 default y 645 646config NEED_DMA_MAP_STATE 647 def_bool (PPC64 || NOT_COHERENT_CACHE) 648 649config NEED_SG_DMA_LENGTH 650 def_bool y 651 652config GENERIC_ISA_DMA 653 bool 654 depends on ISA_DMA_API 655 default y 656 657config PPC_INDIRECT_PCI 658 bool 659 depends on PCI 660 default y if 40x || 44x 661 default n 662 663config EISA 664 bool 665 666config SBUS 667 bool 668 669config FSL_SOC 670 bool 671 select HAVE_CAN_FLEXCAN if NET && CAN 672 select PPC_CLOCK if CAN_FLEXCAN 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 PPC4xx_CPM 688 bool 689 default y 690 depends on SUSPEND && (44x || 40x) 691 help 692 PPC4xx Clock Power Management (CPM) support (suspend/resume). 693 It also enables support for two different idle states (idle-wait 694 and idle-doze). 695 696config 4xx_SOC 697 bool 698 699config FSL_LBC 700 bool "Freescale Local Bus support" 701 depends on FSL_SOC 702 help 703 Enables reporting of errors from the Freescale local bus 704 controller. Also contains some common code used by 705 drivers for specific local bus peripherals. 706 707config FSL_IFC 708 bool 709 depends on FSL_SOC 710 711config FSL_GTM 712 bool 713 depends on PPC_83xx || QUICC_ENGINE || CPM2 714 help 715 Freescale General-purpose Timers support 716 717# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 718config MCA 719 bool 720 721# Platforms that what PCI turned unconditionally just do select PCI 722# in their config node. Platforms that want to choose at config 723# time should select PPC_PCI_CHOICE 724config PPC_PCI_CHOICE 725 bool 726 727config PCI 728 bool "PCI support" if PPC_PCI_CHOICE 729 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 730 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 731 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx 732 default PCI_QSPAN if !4xx && !CPM2 && 8xx 733 select ARCH_SUPPORTS_MSI 734 select GENERIC_PCI_IOMAP 735 help 736 Find out whether your system includes a PCI bus. PCI is the name of 737 a bus system, i.e. the way the CPU talks to the other stuff inside 738 your box. If you say Y here, the kernel will include drivers and 739 infrastructure code to support PCI bus devices. 740 741config PCI_DOMAINS 742 def_bool PCI 743 744config PCI_SYSCALL 745 def_bool PCI 746 747config PCI_QSPAN 748 bool "QSpan PCI" 749 depends on !4xx && !CPM2 && 8xx 750 select PPC_I8259 751 help 752 Say Y here if you have a system based on a Motorola 8xx-series 753 embedded processor with a QSPAN PCI interface, otherwise say N. 754 755config PCI_8260 756 bool 757 depends on PCI && 8260 758 select PPC_INDIRECT_PCI 759 default y 760 761config 8260_PCI9 762 bool "Enable workaround for MPC826x erratum PCI 9" 763 depends on PCI_8260 && !8272 764 default y 765 766source "drivers/pci/pcie/Kconfig" 767 768source "drivers/pci/Kconfig" 769 770source "drivers/pcmcia/Kconfig" 771 772source "drivers/pci/hotplug/Kconfig" 773 774config HAS_RAPIDIO 775 bool 776 default n 777 778config RAPIDIO 779 bool "RapidIO support" 780 depends on HAS_RAPIDIO || PCI 781 help 782 If you say Y here, the kernel will include drivers and 783 infrastructure code to support RapidIO interconnect devices. 784 785config FSL_RIO 786 bool "Freescale Embedded SRIO Controller support" 787 depends on RAPIDIO && HAS_RAPIDIO 788 default "n" 789 ---help--- 790 Include support for RapidIO controller on Freescale embedded 791 processors (MPC8548, MPC8641, etc). 792 793source "drivers/rapidio/Kconfig" 794 795endmenu 796 797config NONSTATIC_KERNEL 798 bool 799 default n 800 801menu "Advanced setup" 802 depends on PPC32 803 804config ADVANCED_OPTIONS 805 bool "Prompt for advanced kernel configuration options" 806 help 807 This option will enable prompting for a variety of advanced kernel 808 configuration options. These options can cause the kernel to not 809 work if they are set incorrectly, but can be used to optimize certain 810 aspects of kernel memory management. 811 812 Unless you know what you are doing, say N here. 813 814comment "Default settings for advanced configuration options are used" 815 depends on !ADVANCED_OPTIONS 816 817config LOWMEM_SIZE_BOOL 818 bool "Set maximum low memory" 819 depends on ADVANCED_OPTIONS 820 help 821 This option allows you to set the maximum amount of memory which 822 will be used as "low memory", that is, memory which the kernel can 823 access directly, without having to set up a kernel virtual mapping. 824 This can be useful in optimizing the layout of kernel virtual 825 memory. 826 827 Say N here unless you know what you are doing. 828 829config LOWMEM_SIZE 830 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 831 default "0x30000000" 832 833config LOWMEM_CAM_NUM_BOOL 834 bool "Set number of CAMs to use to map low memory" 835 depends on ADVANCED_OPTIONS && FSL_BOOKE 836 help 837 This option allows you to set the maximum number of CAM slots that 838 will be used to map low memory. There are a limited number of slots 839 available and even more limited number that will fit in the L1 MMU. 840 However, using more entries will allow mapping more low memory. This 841 can be useful in optimizing the layout of kernel virtual memory. 842 843 Say N here unless you know what you are doing. 844 845config LOWMEM_CAM_NUM 846 depends on FSL_BOOKE 847 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 848 default 3 849 850config DYNAMIC_MEMSTART 851 bool "Enable page aligned dynamic load address for kernel (EXPERIMENTAL)" 852 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 853 select NONSTATIC_KERNEL 854 help 855 This option enables the kernel to be loaded at any page aligned 856 physical address. The kernel creates a mapping from KERNELBASE to 857 the address where the kernel is loaded. The page size here implies 858 the TLB page size of the mapping for kernel on the particular platform. 859 Please refer to the init code for finding the TLB page size. 860 861 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 862 kernel image, where the only restriction is the page aligned kernel 863 load address. When this option is enabled, the compile time physical 864 address CONFIG_PHYSICAL_START is ignored. 865 866 This option is overridden by CONFIG_RELOCATABLE 867 868config RELOCATABLE 869 bool "Build a relocatable kernel (EXPERIMENTAL)" 870 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && 44x 871 select NONSTATIC_KERNEL 872 help 873 This builds a kernel image that is capable of running at the 874 location the kernel is loaded at, without any alignment restrictions. 875 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. 876 877 One use is for the kexec on panic case where the recovery kernel 878 must live at a different physical address than the primary 879 kernel. 880 881 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 882 it has been loaded at and the compile time physical addresses 883 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 884 setting can still be useful to bootwrappers that need to know the 885 load address of the kernel (eg. u-boot/mkimage). 886 887config RELOCATABLE_PPC32 888 def_bool y 889 depends on PPC32 && RELOCATABLE 890 891config PAGE_OFFSET_BOOL 892 bool "Set custom page offset address" 893 depends on ADVANCED_OPTIONS 894 help 895 This option allows you to set the kernel virtual address at which 896 the kernel will map low memory. This can be useful in optimizing 897 the virtual memory layout of the system. 898 899 Say N here unless you know what you are doing. 900 901config PAGE_OFFSET 902 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 903 default "0xc0000000" 904 905config KERNEL_START_BOOL 906 bool "Set custom kernel base address" 907 depends on ADVANCED_OPTIONS 908 help 909 This option allows you to set the kernel virtual address at which 910 the kernel will be loaded. Normally this should match PAGE_OFFSET 911 however there are times (like kdump) that one might not want them 912 to be the same. 913 914 Say N here unless you know what you are doing. 915 916config KERNEL_START 917 hex "Virtual address of kernel base" if KERNEL_START_BOOL 918 default PAGE_OFFSET if PAGE_OFFSET_BOOL 919 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 920 default "0xc0000000" 921 922config PHYSICAL_START_BOOL 923 bool "Set physical address where the kernel is loaded" 924 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 925 help 926 This gives the physical address where the kernel is loaded. 927 928 Say N here unless you know what you are doing. 929 930config PHYSICAL_START 931 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 932 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 933 default "0x00000000" 934 935config PHYSICAL_ALIGN 936 hex 937 default "0x04000000" if FSL_BOOKE 938 help 939 This value puts the alignment restrictions on physical address 940 where kernel is loaded and run from. Kernel is compiled for an 941 address which meets above alignment restriction. 942 943config TASK_SIZE_BOOL 944 bool "Set custom user task size" 945 depends on ADVANCED_OPTIONS 946 help 947 This option allows you to set the amount of virtual address space 948 allocated to user tasks. This can be useful in optimizing the 949 virtual memory layout of the system. 950 951 Say N here unless you know what you are doing. 952 953config TASK_SIZE 954 hex "Size of user task space" if TASK_SIZE_BOOL 955 default "0x80000000" if PPC_PREP || PPC_8xx 956 default "0xc0000000" 957 958config CONSISTENT_SIZE_BOOL 959 bool "Set custom consistent memory pool size" 960 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 961 help 962 This option allows you to set the size of the 963 consistent memory pool. This pool of virtual memory 964 is used to make consistent memory allocations. 965 966config CONSISTENT_SIZE 967 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 968 default "0x00200000" if NOT_COHERENT_CACHE 969 970config PIN_TLB 971 bool "Pinned Kernel TLBs (860 ONLY)" 972 depends on ADVANCED_OPTIONS && 8xx 973endmenu 974 975if PPC64 976config RELOCATABLE 977 bool "Build a relocatable kernel" 978 select NONSTATIC_KERNEL 979 help 980 This builds a kernel image that is capable of running anywhere 981 in the RMA (real memory area) at any 16k-aligned base address. 982 The kernel is linked as a position-independent executable (PIE) 983 and contains dynamic relocations which are processed early 984 in the bootup process. 985 986 One use is for the kexec on panic case where the recovery kernel 987 must live at a different physical address than the primary 988 kernel. 989 990config PAGE_OFFSET 991 hex 992 default "0xc000000000000000" 993config KERNEL_START 994 hex 995 default "0xc000000000000000" 996config PHYSICAL_START 997 hex 998 default "0x00000000" 999endif 1000 1001source "net/Kconfig" 1002 1003source "drivers/Kconfig" 1004 1005source "fs/Kconfig" 1006 1007source "arch/powerpc/sysdev/qe_lib/Kconfig" 1008 1009source "lib/Kconfig" 1010 1011source "arch/powerpc/Kconfig.debug" 1012 1013source "security/Kconfig" 1014 1015config KEYS_COMPAT 1016 bool 1017 depends on COMPAT && KEYS 1018 default y 1019 1020source "crypto/Kconfig" 1021 1022config PPC_CLOCK 1023 bool 1024 default n 1025 select HAVE_CLK 1026 1027config PPC_LIB_RHEAP 1028 bool 1029 1030source "arch/powerpc/kvm/Kconfig" 1031