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 TRACE_IRQFLAGS_SUPPORT 51 bool 52 default y 53 54config LOCKDEP_SUPPORT 55 bool 56 default y 57 58config RWSEM_GENERIC_SPINLOCK 59 bool 60 61config RWSEM_XCHGADD_ALGORITHM 62 bool 63 default y 64 65config GENERIC_LOCKBREAK 66 bool 67 default y 68 depends on SMP && PREEMPT 69 70config ARCH_HAS_ILOG2_U32 71 bool 72 default y 73 74config ARCH_HAS_ILOG2_U64 75 bool 76 default y if 64BIT 77 78config GENERIC_HWEIGHT 79 bool 80 default y 81 82config ARCH_HAS_DMA_SET_COHERENT_MASK 83 bool 84 85config PPC 86 bool 87 default y 88 select ARCH_MIGHT_HAVE_PC_PARPORT 89 select ARCH_MIGHT_HAVE_PC_SERIO 90 select BINFMT_ELF 91 select ARCH_HAS_ELF_RANDOMIZE 92 select OF 93 select OF_EARLY_FLATTREE 94 select OF_RESERVED_MEM 95 select HAVE_FTRACE_MCOUNT_RECORD 96 select HAVE_DYNAMIC_FTRACE 97 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 98 select HAVE_FUNCTION_TRACER 99 select HAVE_FUNCTION_GRAPH_TRACER 100 select SYSCTL_EXCEPTION_TRACE 101 select ARCH_WANT_OPTIONAL_GPIOLIB 102 select VIRT_TO_BUS if !PPC64 103 select HAVE_IDE 104 select HAVE_IOREMAP_PROT 105 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN 106 select HAVE_KPROBES 107 select HAVE_ARCH_KGDB 108 select HAVE_KRETPROBES 109 select HAVE_ARCH_TRACEHOOK 110 select HAVE_MEMBLOCK 111 select HAVE_MEMBLOCK_NODE_MAP 112 select HAVE_DMA_API_DEBUG 113 select HAVE_OPROFILE 114 select HAVE_DEBUG_KMEMLEAK 115 select ARCH_HAS_SG_CHAIN 116 select GENERIC_ATOMIC64 if PPC32 117 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 118 select HAVE_PERF_EVENTS 119 select HAVE_REGS_AND_STACK_ACCESS_API 120 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 121 select ARCH_WANT_IPC_PARSE_VERSION 122 select SPARSE_IRQ 123 select IRQ_DOMAIN 124 select GENERIC_IRQ_SHOW 125 select GENERIC_IRQ_SHOW_LEVEL 126 select IRQ_FORCED_THREADING 127 select HAVE_RCU_TABLE_FREE if SMP 128 select HAVE_SYSCALL_TRACEPOINTS 129 select HAVE_BPF_JIT 130 select HAVE_ARCH_JUMP_LABEL 131 select ARCH_HAVE_NMI_SAFE_CMPXCHG 132 select ARCH_HAS_GCOV_PROFILE_ALL 133 select GENERIC_SMP_IDLE_THREAD 134 select GENERIC_CMOS_UPDATE 135 select GENERIC_TIME_VSYSCALL_OLD 136 select GENERIC_CLOCKEVENTS 137 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 138 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 139 select GENERIC_STRNCPY_FROM_USER 140 select GENERIC_STRNLEN_USER 141 select HAVE_MOD_ARCH_SPECIFIC 142 select MODULES_USE_ELF_RELA 143 select CLONE_BACKWARDS 144 select ARCH_USE_BUILTIN_BSWAP 145 select OLD_SIGSUSPEND 146 select OLD_SIGACTION if PPC32 147 select HAVE_DEBUG_STACKOVERFLOW 148 select HAVE_IRQ_EXIT_ON_IRQ_STACK 149 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 150 select HAVE_ARCH_AUDITSYSCALL 151 select ARCH_SUPPORTS_ATOMIC_RMW 152 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 153 select NO_BOOTMEM 154 select HAVE_GENERIC_RCU_GUP 155 select HAVE_PERF_EVENTS_NMI if PPC64 156 select EDAC_SUPPORT 157 select EDAC_ATOMIC_SCRUB 158 select ARCH_HAS_DMA_SET_COHERENT_MASK 159 select ARCH_HAS_DEVMEM_IS_ALLOWED 160 select HAVE_ARCH_SECCOMP_FILTER 161 select ARCH_HAS_UBSAN_SANITIZE_ALL 162 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 163 164config GENERIC_CSUM 165 def_bool CPU_LITTLE_ENDIAN 166 167config EARLY_PRINTK 168 bool 169 default y 170 171config PANIC_TIMEOUT 172 int 173 default 180 174 175config COMPAT 176 bool 177 default y if PPC64 178 select COMPAT_BINFMT_ELF 179 select ARCH_WANT_OLD_COMPAT_IPC 180 select COMPAT_OLD_SIGACTION 181 182config SYSVIPC_COMPAT 183 bool 184 depends on COMPAT && SYSVIPC 185 default y 186 187# All PPC32s use generic nvram driver through ppc_md 188config GENERIC_NVRAM 189 bool 190 default y if PPC32 191 192config SCHED_OMIT_FRAME_POINTER 193 bool 194 default y 195 196config ARCH_MAY_HAVE_PC_FDC 197 bool 198 default PCI 199 200config PPC_UDBG_16550 201 bool 202 default n 203 204config GENERIC_TBSYNC 205 bool 206 default y if PPC32 && SMP 207 default n 208 209config AUDIT_ARCH 210 bool 211 default y 212 213config GENERIC_BUG 214 bool 215 default y 216 depends on BUG 217 218config SYS_SUPPORTS_APM_EMULATION 219 default y if PMAC_APM_EMU 220 bool 221 222config EPAPR_BOOT 223 bool 224 help 225 Used to allow a board to specify it wants an ePAPR compliant wrapper. 226 default n 227 228config DEFAULT_UIMAGE 229 bool 230 help 231 Used to allow a board to specify it wants a uImage built by default 232 default n 233 234config ARCH_HIBERNATION_POSSIBLE 235 bool 236 default y 237 238config ARCH_SUSPEND_POSSIBLE 239 def_bool y 240 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 241 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 242 || 44x || 40x 243 244config PPC_DCR_NATIVE 245 bool 246 default n 247 248config PPC_DCR_MMIO 249 bool 250 default n 251 252config PPC_DCR 253 bool 254 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 255 default y 256 257config PPC_OF_PLATFORM_PCI 258 bool 259 depends on PCI 260 depends on PPC64 # not supported on 32 bits yet 261 default n 262 263config ARCH_SUPPORTS_DEBUG_PAGEALLOC 264 depends on PPC32 || PPC_STD_MMU_64 265 def_bool y 266 267config ARCH_SUPPORTS_UPROBES 268 def_bool y 269 270config PPC_ADV_DEBUG_REGS 271 bool 272 depends on 40x || BOOKE 273 default y 274 275config PPC_ADV_DEBUG_IACS 276 int 277 depends on PPC_ADV_DEBUG_REGS 278 default 4 if 44x 279 default 2 280 281config PPC_ADV_DEBUG_DACS 282 int 283 depends on PPC_ADV_DEBUG_REGS 284 default 2 285 286config PPC_ADV_DEBUG_DVCS 287 int 288 depends on PPC_ADV_DEBUG_REGS 289 default 2 if 44x 290 default 0 291 292config PPC_ADV_DEBUG_DAC_RANGE 293 bool 294 depends on PPC_ADV_DEBUG_REGS && 44x 295 default y 296 297config PPC_EMULATE_SSTEP 298 bool 299 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT 300 301config ZONE_DMA32 302 bool 303 default y if PPC64 304 305config PGTABLE_LEVELS 306 int 307 default 2 if !PPC64 308 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 309 default 4 310 311source "init/Kconfig" 312 313source "kernel/Kconfig.freezer" 314 315source "arch/powerpc/sysdev/Kconfig" 316source "arch/powerpc/platforms/Kconfig" 317 318menu "Kernel options" 319 320config HIGHMEM 321 bool "High memory support" 322 depends on PPC32 323 324source kernel/Kconfig.hz 325source kernel/Kconfig.preempt 326source "fs/Kconfig.binfmt" 327 328config HUGETLB_PAGE_SIZE_VARIABLE 329 bool 330 depends on HUGETLB_PAGE 331 default y 332 333config MATH_EMULATION 334 bool "Math emulation" 335 depends on 4xx || 8xx || PPC_MPC832x || BOOKE 336 ---help--- 337 Some PowerPC chips designed for embedded applications do not have 338 a floating-point unit and therefore do not implement the 339 floating-point instructions in the PowerPC instruction set. If you 340 say Y here, the kernel will include code to emulate a floating-point 341 unit, which will allow programs that use floating-point 342 instructions to run. 343 344 This is also useful to emulate missing (optional) instructions 345 such as fsqrt on cores that do have an FPU but do not implement 346 them (such as Freescale BookE). 347 348choice 349 prompt "Math emulation options" 350 default MATH_EMULATION_FULL 351 depends on MATH_EMULATION 352 353config MATH_EMULATION_FULL 354 bool "Emulate all the floating point instructions" 355 ---help--- 356 Select this option will enable the kernel to support to emulate 357 all the floating point instructions. If your SoC doesn't have 358 a FPU, you should select this. 359 360config MATH_EMULATION_HW_UNIMPLEMENTED 361 bool "Just emulate the FPU unimplemented instructions" 362 ---help--- 363 Select this if you know there does have a hardware FPU on your 364 SoC, but some floating point instructions are not implemented by that. 365 366endchoice 367 368config PPC_TRANSACTIONAL_MEM 369 bool "Transactional Memory support for POWERPC" 370 depends on PPC_BOOK3S_64 371 depends on SMP 372 select ALTIVEC 373 select VSX 374 default n 375 ---help--- 376 Support user-mode Transactional Memory on POWERPC. 377 378config DISABLE_MPROFILE_KERNEL 379 bool "Disable use of mprofile-kernel for kernel tracing" 380 depends on PPC64 && CPU_LITTLE_ENDIAN 381 default y 382 help 383 Selecting this options disables use of the mprofile-kernel ABI for 384 kernel tracing. That will cause options such as live patching 385 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to 386 be disabled also. 387 388 If you have a toolchain which supports mprofile-kernel, then you can 389 enable this. Otherwise leave it disabled. If you're not sure, say 390 "N". 391 392config MPROFILE_KERNEL 393 depends on PPC64 && CPU_LITTLE_ENDIAN 394 def_bool !DISABLE_MPROFILE_KERNEL 395 396config IOMMU_HELPER 397 def_bool PPC64 398 399config SWIOTLB 400 bool "SWIOTLB support" 401 default n 402 select IOMMU_HELPER 403 ---help--- 404 Support for IO bounce buffering for systems without an IOMMU. 405 This allows us to DMA to the full physical address space on 406 platforms where the size of a physical address is larger 407 than the bus address. Not all platforms support this. 408 409config HOTPLUG_CPU 410 bool "Support for enabling/disabling CPUs" 411 depends on SMP && (PPC_PSERIES || \ 412 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 413 ---help--- 414 Say Y here to be able to disable and re-enable individual 415 CPUs at runtime on SMP machines. 416 417 Say N if you are unsure. 418 419config ARCH_CPU_PROBE_RELEASE 420 def_bool y 421 depends on HOTPLUG_CPU 422 423config ARCH_ENABLE_MEMORY_HOTPLUG 424 def_bool y 425 426config ARCH_HAS_WALK_MEMORY 427 def_bool y 428 429config ARCH_ENABLE_MEMORY_HOTREMOVE 430 def_bool y 431 432config PPC64_SUPPORTS_MEMORY_FAILURE 433 bool "Add support for memory hwpoison" 434 depends on PPC_BOOK3S_64 435 default "y" if PPC_POWERNV 436 select ARCH_SUPPORTS_MEMORY_FAILURE 437 438config KEXEC 439 bool "kexec system call" 440 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 441 select KEXEC_CORE 442 help 443 kexec is a system call that implements the ability to shutdown your 444 current kernel, and to start another kernel. It is like a reboot 445 but it is independent of the system firmware. And like a reboot 446 you can start any kernel with it, not just Linux. 447 448 The name comes from the similarity to the exec system call. 449 450 It is an ongoing process to be certain the hardware in a machine 451 is properly shutdown, so do not be surprised if this code does not 452 initially work for you. As of this writing the exact hardware 453 interface is strongly in flux, so no good recommendation can be 454 made. 455 456config CRASH_DUMP 457 bool "Build a kdump crash kernel" 458 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 459 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 460 help 461 Build a kernel suitable for use as a kdump capture kernel. 462 The same kernel binary can be used as production kernel and dump 463 capture kernel. 464 465config FA_DUMP 466 bool "Firmware-assisted dump" 467 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC 468 help 469 A robust mechanism to get reliable kernel crash dump with 470 assistance from firmware. This approach does not use kexec, 471 instead firmware assists in booting the kdump kernel 472 while preserving memory contents. Firmware-assisted dump 473 is meant to be a kdump replacement offering robustness and 474 speed not possible without system firmware assistance. 475 476 If unsure, say "N" 477 478config IRQ_ALL_CPUS 479 bool "Distribute interrupts on all CPUs by default" 480 depends on SMP 481 help 482 This option gives the kernel permission to distribute IRQs across 483 multiple CPUs. Saying N here will route all IRQs to the first 484 CPU. Generally saying Y is safe, although some problems have been 485 reported with SMP Power Macintoshes with this option enabled. 486 487config NUMA 488 bool "NUMA support" 489 depends on PPC64 490 default y if SMP && PPC_PSERIES 491 492config NODES_SHIFT 493 int 494 default "8" if PPC64 495 default "4" 496 depends on NEED_MULTIPLE_NODES 497 498config USE_PERCPU_NUMA_NODE_ID 499 def_bool y 500 depends on NUMA 501 502config HAVE_MEMORYLESS_NODES 503 def_bool y 504 depends on NUMA 505 506config ARCH_SELECT_MEMORY_MODEL 507 def_bool y 508 depends on PPC64 509 510config ARCH_FLATMEM_ENABLE 511 def_bool y 512 depends on (PPC64 && !NUMA) || PPC32 513 514config ARCH_SPARSEMEM_ENABLE 515 def_bool y 516 depends on PPC64 517 select SPARSEMEM_VMEMMAP_ENABLE 518 519config ARCH_SPARSEMEM_DEFAULT 520 def_bool y 521 depends on (SMP && PPC_PSERIES) || PPC_PS3 522 523config SYS_SUPPORTS_HUGETLBFS 524 bool 525 526source "mm/Kconfig" 527 528config ARCH_MEMORY_PROBE 529 def_bool y 530 depends on MEMORY_HOTPLUG 531 532# Some NUMA nodes have memory ranges that span 533# other nodes. Even though a pfn is valid and 534# between a node's start and end pfns, it may not 535# reside on that node. See memmap_init_zone() 536# for details. 537config NODES_SPAN_OTHER_NODES 538 def_bool y 539 depends on NEED_MULTIPLE_NODES 540 541config STDBINUTILS 542 bool "Using standard binutils settings" 543 depends on 44x 544 default y 545 help 546 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 547 Note, that kernel will be able to run only those applications, 548 which had been compiled using binutils later than 2.17.50.0.3 with 549 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 550 the older binutils, you can patch them with a trivial patch, which 551 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 552 553choice 554 prompt "Page size" 555 default PPC_4K_PAGES 556 help 557 Select the kernel logical page size. Increasing the page size 558 will reduce software overhead at each page boundary, allow 559 hardware prefetch mechanisms to be more effective, and allow 560 larger dma transfers increasing IO efficiency and reducing 561 overhead. However the utilization of memory will increase. 562 For example, each cached file will using a multiple of the 563 page size to hold its contents and the difference between the 564 end of file and the end of page is wasted. 565 566 Some dedicated systems, such as software raid serving with 567 accelerated calculations, have shown significant increases. 568 569 If you configure a 64 bit kernel for 64k pages but the 570 processor does not support them, then the kernel will simulate 571 them with 4k pages, loading them on demand, but with the 572 reduced software overhead and larger internal fragmentation. 573 For the 32 bit kernel, a large page option will not be offered 574 unless it is supported by the configured processor. 575 576 If unsure, choose 4K_PAGES. 577 578config PPC_4K_PAGES 579 bool "4k page size" 580 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 581 582config PPC_16K_PAGES 583 bool "16k page size" 584 depends on 44x || PPC_8xx 585 586config PPC_64K_PAGES 587 bool "64k page size" 588 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 589 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 590 591config PPC_256K_PAGES 592 bool "256k page size" 593 depends on 44x && !STDBINUTILS 594 help 595 Make the page size 256k. 596 597 As the ELF standard only requires alignment to support page 598 sizes up to 64k, you will need to compile all of your user 599 space applications with a non-standard binutils settings 600 (see the STDBINUTILS description for details). 601 602 Say N unless you know what you are doing. 603 604endchoice 605 606config FORCE_MAX_ZONEORDER 607 int "Maximum zone order" 608 range 9 64 if PPC64 && PPC_64K_PAGES 609 default "9" if PPC64 && PPC_64K_PAGES 610 range 13 64 if PPC64 && !PPC_64K_PAGES 611 default "13" if PPC64 && !PPC_64K_PAGES 612 range 9 64 if PPC32 && PPC_16K_PAGES 613 default "9" if PPC32 && PPC_16K_PAGES 614 range 7 64 if PPC32 && PPC_64K_PAGES 615 default "7" if PPC32 && PPC_64K_PAGES 616 range 5 64 if PPC32 && PPC_256K_PAGES 617 default "5" if PPC32 && PPC_256K_PAGES 618 range 11 64 619 default "11" 620 help 621 The kernel memory allocator divides physically contiguous memory 622 blocks into "zones", where each zone is a power of two number of 623 pages. This option selects the largest power of two that the kernel 624 keeps in the memory allocator. If you need to allocate very large 625 blocks of physically contiguous memory, then you may need to 626 increase this value. 627 628 This config option is actually maximum order plus one. For example, 629 a value of 11 means that the largest free memory block is 2^10 pages. 630 631 The page size is not necessarily 4KB. For example, on 64-bit 632 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 633 this in mind when choosing a value for this option. 634 635config PPC_SUBPAGE_PROT 636 bool "Support setting protections for 4k subpages" 637 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 638 help 639 This option adds support for a system call to allow user programs 640 to set access permissions (read/write, readonly, or no access) 641 on the 4k subpages of each 64k page. 642 643config PPC_COPRO_BASE 644 bool 645 default n 646 647config SCHED_SMT 648 bool "SMT (Hyperthreading) scheduler support" 649 depends on PPC64 && SMP 650 help 651 SMT scheduler support improves the CPU scheduler's decision making 652 when dealing with POWER5 cpus at a cost of slightly increased 653 overhead in some places. If unsure say N here. 654 655config PPC_DENORMALISATION 656 bool "PowerPC denormalisation exception handling" 657 depends on PPC_BOOK3S_64 658 default "y" if PPC_POWERNV 659 ---help--- 660 Add support for handling denormalisation of single precision 661 values. Useful for bare metal only. If unsure say Y here. 662 663config CMDLINE_BOOL 664 bool "Default bootloader kernel arguments" 665 666config CMDLINE 667 string "Initial kernel command string" 668 depends on CMDLINE_BOOL 669 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 670 help 671 On some platforms, there is currently no way for the boot loader to 672 pass arguments to the kernel. For these platforms, you can supply 673 some command-line options at build time by entering them here. In 674 most cases you will need to specify the root device here. 675 676config CMDLINE_FORCE 677 bool "Always use the default kernel command string" 678 depends on CMDLINE_BOOL 679 help 680 Always use the default kernel command string, even if the boot 681 loader passes other arguments to the kernel. 682 This is useful if you cannot or don't want to change the 683 command-line options your boot loader passes to the kernel. 684 685config EXTRA_TARGETS 686 string "Additional default image types" 687 help 688 List additional targets to be built by the bootwrapper here (separated 689 by spaces). This is useful for targets that depend of device tree 690 files in the .dts directory. 691 692 Targets in this list will be build as part of the default build 693 target, or when the user does a 'make zImage' or a 694 'make zImage.initrd'. 695 696 If unsure, leave blank 697 698config ARCH_WANTS_FREEZER_CONTROL 699 def_bool y 700 depends on ADB_PMU 701 702source kernel/power/Kconfig 703 704config SECCOMP 705 bool "Enable seccomp to safely compute untrusted bytecode" 706 depends on PROC_FS 707 default y 708 help 709 This kernel feature is useful for number crunching applications 710 that may need to compute untrusted bytecode during their 711 execution. By using pipes or other transports made available to 712 the process as file descriptors supporting the read/write 713 syscalls, it's possible to isolate those applications in 714 their own address space using seccomp. Once seccomp is 715 enabled via /proc/<pid>/seccomp, it cannot be disabled 716 and the task is only allowed to execute a few safe syscalls 717 defined by each seccomp mode. 718 719 If unsure, say Y. Only embedded should say N here. 720 721endmenu 722 723config ISA_DMA_API 724 bool 725 default PCI 726 727menu "Bus options" 728 729config ISA 730 bool "Support for ISA-bus hardware" 731 depends on PPC_CHRP 732 select PPC_I8259 733 help 734 Find out whether you have ISA slots on your motherboard. ISA is the 735 name of a bus system, i.e. the way the CPU talks to the other stuff 736 inside your box. If you have an Apple machine, say N here; if you 737 have an IBM RS/6000 or pSeries machine, say Y. If you have an 738 embedded board, consult your board documentation. 739 740config ZONE_DMA 741 bool 742 default y 743 744config NEED_DMA_MAP_STATE 745 def_bool (PPC64 || NOT_COHERENT_CACHE) 746 747config NEED_SG_DMA_LENGTH 748 def_bool y 749 750config GENERIC_ISA_DMA 751 bool 752 depends on ISA_DMA_API 753 default y 754 755config PPC_INDIRECT_PCI 756 bool 757 depends on PCI 758 default y if 40x || 44x 759 default n 760 761config EISA 762 bool 763 764config SBUS 765 bool 766 767config FSL_SOC 768 bool 769 770config FSL_PCI 771 bool 772 select PPC_INDIRECT_PCI 773 select PCI_QUIRKS 774 775config FSL_PMC 776 bool 777 default y 778 depends on SUSPEND && (PPC_85xx || PPC_86xx) 779 help 780 Freescale MPC85xx/MPC86xx power management controller support 781 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 782 783config PPC4xx_CPM 784 bool 785 default y 786 depends on SUSPEND && (44x || 40x) 787 help 788 PPC4xx Clock Power Management (CPM) support (suspend/resume). 789 It also enables support for two different idle states (idle-wait 790 and idle-doze). 791 792config 4xx_SOC 793 bool 794 795config FSL_LBC 796 bool "Freescale Local Bus support" 797 depends on FSL_SOC 798 help 799 Enables reporting of errors from the Freescale local bus 800 controller. Also contains some common code used by 801 drivers for specific local bus peripherals. 802 803config FSL_GTM 804 bool 805 depends on PPC_83xx || QUICC_ENGINE || CPM2 806 help 807 Freescale General-purpose Timers support 808 809# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 810config MCA 811 bool 812 813# Platforms that what PCI turned unconditionally just do select PCI 814# in their config node. Platforms that want to choose at config 815# time should select PPC_PCI_CHOICE 816config PPC_PCI_CHOICE 817 bool 818 819config PCI 820 bool "PCI support" if PPC_PCI_CHOICE 821 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 822 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 823 default PCI_QSPAN if !4xx && !CPM2 && 8xx 824 select GENERIC_PCI_IOMAP 825 help 826 Find out whether your system includes a PCI bus. PCI is the name of 827 a bus system, i.e. the way the CPU talks to the other stuff inside 828 your box. If you say Y here, the kernel will include drivers and 829 infrastructure code to support PCI bus devices. 830 831config PCI_DOMAINS 832 def_bool PCI 833 834config PCI_SYSCALL 835 def_bool PCI 836 837config PCI_QSPAN 838 bool "QSpan PCI" 839 depends on !4xx && !CPM2 && 8xx 840 select PPC_I8259 841 help 842 Say Y here if you have a system based on a Motorola 8xx-series 843 embedded processor with a QSPAN PCI interface, otherwise say N. 844 845config PCI_8260 846 bool 847 depends on PCI && 8260 848 select PPC_INDIRECT_PCI 849 default y 850 851source "drivers/pci/Kconfig" 852 853source "drivers/pcmcia/Kconfig" 854 855config HAS_RAPIDIO 856 bool 857 default n 858 859config RAPIDIO 860 tristate "RapidIO support" 861 depends on HAS_RAPIDIO || PCI 862 help 863 If you say Y here, the kernel will include drivers and 864 infrastructure code to support RapidIO interconnect devices. 865 866config FSL_RIO 867 bool "Freescale Embedded SRIO Controller support" 868 depends on RAPIDIO = y && HAS_RAPIDIO 869 default "n" 870 ---help--- 871 Include support for RapidIO controller on Freescale embedded 872 processors (MPC8548, MPC8641, etc). 873 874source "drivers/rapidio/Kconfig" 875 876endmenu 877 878config NONSTATIC_KERNEL 879 bool 880 default n 881 882menu "Advanced setup" 883 depends on PPC32 884 885config ADVANCED_OPTIONS 886 bool "Prompt for advanced kernel configuration options" 887 help 888 This option will enable prompting for a variety of advanced kernel 889 configuration options. These options can cause the kernel to not 890 work if they are set incorrectly, but can be used to optimize certain 891 aspects of kernel memory management. 892 893 Unless you know what you are doing, say N here. 894 895comment "Default settings for advanced configuration options are used" 896 depends on !ADVANCED_OPTIONS 897 898config LOWMEM_SIZE_BOOL 899 bool "Set maximum low memory" 900 depends on ADVANCED_OPTIONS 901 help 902 This option allows you to set the maximum amount of memory which 903 will be used as "low memory", that is, memory which the kernel can 904 access directly, without having to set up a kernel virtual mapping. 905 This can be useful in optimizing the layout of kernel virtual 906 memory. 907 908 Say N here unless you know what you are doing. 909 910config LOWMEM_SIZE 911 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 912 default "0x30000000" 913 914config LOWMEM_CAM_NUM_BOOL 915 bool "Set number of CAMs to use to map low memory" 916 depends on ADVANCED_OPTIONS && FSL_BOOKE 917 help 918 This option allows you to set the maximum number of CAM slots that 919 will be used to map low memory. There are a limited number of slots 920 available and even more limited number that will fit in the L1 MMU. 921 However, using more entries will allow mapping more low memory. This 922 can be useful in optimizing the layout of kernel virtual memory. 923 924 Say N here unless you know what you are doing. 925 926config LOWMEM_CAM_NUM 927 depends on FSL_BOOKE 928 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 929 default 3 930 931config DYNAMIC_MEMSTART 932 bool "Enable page aligned dynamic load address for kernel" 933 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 934 select NONSTATIC_KERNEL 935 help 936 This option enables the kernel to be loaded at any page aligned 937 physical address. The kernel creates a mapping from KERNELBASE to 938 the address where the kernel is loaded. The page size here implies 939 the TLB page size of the mapping for kernel on the particular platform. 940 Please refer to the init code for finding the TLB page size. 941 942 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 943 kernel image, where the only restriction is the page aligned kernel 944 load address. When this option is enabled, the compile time physical 945 address CONFIG_PHYSICAL_START is ignored. 946 947 This option is overridden by CONFIG_RELOCATABLE 948 949config RELOCATABLE 950 bool "Build a relocatable kernel" 951 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE) 952 select NONSTATIC_KERNEL 953 help 954 This builds a kernel image that is capable of running at the 955 location the kernel is loaded at, without any alignment restrictions. 956 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. 957 958 One use is for the kexec on panic case where the recovery kernel 959 must live at a different physical address than the primary 960 kernel. 961 962 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 963 it has been loaded at and the compile time physical addresses 964 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 965 setting can still be useful to bootwrappers that need to know the 966 load address of the kernel (eg. u-boot/mkimage). 967 968config RELOCATABLE_PPC32 969 def_bool y 970 depends on PPC32 && RELOCATABLE 971 972config PAGE_OFFSET_BOOL 973 bool "Set custom page offset address" 974 depends on ADVANCED_OPTIONS 975 help 976 This option allows you to set the kernel virtual address at which 977 the kernel will map low memory. This can be useful in optimizing 978 the virtual memory layout of the system. 979 980 Say N here unless you know what you are doing. 981 982config PAGE_OFFSET 983 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 984 default "0xc0000000" 985 986config KERNEL_START_BOOL 987 bool "Set custom kernel base address" 988 depends on ADVANCED_OPTIONS 989 help 990 This option allows you to set the kernel virtual address at which 991 the kernel will be loaded. Normally this should match PAGE_OFFSET 992 however there are times (like kdump) that one might not want them 993 to be the same. 994 995 Say N here unless you know what you are doing. 996 997config KERNEL_START 998 hex "Virtual address of kernel base" if KERNEL_START_BOOL 999 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1000 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1001 default "0xc0000000" 1002 1003config PHYSICAL_START_BOOL 1004 bool "Set physical address where the kernel is loaded" 1005 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1006 help 1007 This gives the physical address where the kernel is loaded. 1008 1009 Say N here unless you know what you are doing. 1010 1011config PHYSICAL_START 1012 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1013 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1014 default "0x00000000" 1015 1016config PHYSICAL_ALIGN 1017 hex 1018 default "0x04000000" if FSL_BOOKE 1019 help 1020 This value puts the alignment restrictions on physical address 1021 where kernel is loaded and run from. Kernel is compiled for an 1022 address which meets above alignment restriction. 1023 1024config TASK_SIZE_BOOL 1025 bool "Set custom user task size" 1026 depends on ADVANCED_OPTIONS 1027 help 1028 This option allows you to set the amount of virtual address space 1029 allocated to user tasks. This can be useful in optimizing the 1030 virtual memory layout of the system. 1031 1032 Say N here unless you know what you are doing. 1033 1034config TASK_SIZE 1035 hex "Size of user task space" if TASK_SIZE_BOOL 1036 default "0x80000000" if PPC_8xx 1037 default "0xc0000000" 1038 1039config CONSISTENT_SIZE_BOOL 1040 bool "Set custom consistent memory pool size" 1041 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1042 help 1043 This option allows you to set the size of the 1044 consistent memory pool. This pool of virtual memory 1045 is used to make consistent memory allocations. 1046 1047config CONSISTENT_SIZE 1048 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1049 default "0x00200000" if NOT_COHERENT_CACHE 1050 1051config PIN_TLB 1052 bool "Pinned Kernel TLBs (860 ONLY)" 1053 depends on ADVANCED_OPTIONS && 8xx 1054endmenu 1055 1056if PPC64 1057config RELOCATABLE 1058 bool "Build a relocatable kernel" 1059 depends on !COMPILE_TEST 1060 select NONSTATIC_KERNEL 1061 help 1062 This builds a kernel image that is capable of running anywhere 1063 in the RMA (real memory area) at any 16k-aligned base address. 1064 The kernel is linked as a position-independent executable (PIE) 1065 and contains dynamic relocations which are processed early 1066 in the bootup process. 1067 1068 One use is for the kexec on panic case where the recovery kernel 1069 must live at a different physical address than the primary 1070 kernel. 1071 1072# This value must have zeroes in the bottom 60 bits otherwise lots will break 1073config PAGE_OFFSET 1074 hex 1075 default "0xc000000000000000" 1076config KERNEL_START 1077 hex 1078 default "0xc000000000000000" 1079config PHYSICAL_START 1080 hex 1081 default "0x00000000" 1082endif 1083 1084config ARCH_RANDOM 1085 def_bool n 1086 1087source "net/Kconfig" 1088 1089source "drivers/Kconfig" 1090 1091source "fs/Kconfig" 1092 1093source "lib/Kconfig" 1094 1095source "arch/powerpc/Kconfig.debug" 1096 1097source "security/Kconfig" 1098 1099config KEYS_COMPAT 1100 bool 1101 depends on COMPAT && KEYS 1102 default y 1103 1104source "crypto/Kconfig" 1105 1106config PPC_LIB_RHEAP 1107 bool 1108 1109source "arch/powerpc/kvm/Kconfig" 1110