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Linux/arch/powerpc/Kconfig

  1 source "arch/powerpc/platforms/Kconfig.cputype"
  2 
  3 config PPC32
  4         bool
  5         default y if !PPC64
  6 
  7 config 32BIT
  8         bool
  9         default y if PPC32
 10 
 11 config 64BIT
 12         bool
 13         default y if PPC64
 14 
 15 config WORD_SIZE
 16         int
 17         default 64 if PPC64
 18         default 32 if !PPC64
 19 
 20 config ARCH_PHYS_ADDR_T_64BIT
 21        def_bool PPC64 || PHYS_64BIT
 22 
 23 config ARCH_DMA_ADDR_T_64BIT
 24         def_bool ARCH_PHYS_ADDR_T_64BIT
 25 
 26 config MMU
 27         bool
 28         default y
 29 
 30 config HAVE_SETUP_PER_CPU_AREA
 31         def_bool PPC64
 32 
 33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 34         def_bool PPC64
 35 
 36 config 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 
 46 config STACKTRACE_SUPPORT
 47         bool
 48         default y
 49 
 50 config TRACE_IRQFLAGS_SUPPORT
 51         bool
 52         default y
 53 
 54 config LOCKDEP_SUPPORT
 55         bool
 56         default y
 57 
 58 config RWSEM_GENERIC_SPINLOCK
 59         bool
 60 
 61 config RWSEM_XCHGADD_ALGORITHM
 62         bool
 63         default y
 64 
 65 config GENERIC_LOCKBREAK
 66         bool
 67         default y
 68         depends on SMP && PREEMPT
 69 
 70 config ARCH_HAS_ILOG2_U32
 71         bool
 72         default y
 73 
 74 config ARCH_HAS_ILOG2_U64
 75         bool
 76         default y if 64BIT
 77 
 78 config GENERIC_HWEIGHT
 79         bool
 80         default y
 81 
 82 config ARCH_HAS_DMA_SET_COHERENT_MASK
 83         bool
 84 
 85 config 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_FUNCTION_TRACER
 98         select HAVE_FUNCTION_GRAPH_TRACER
 99         select SYSCTL_EXCEPTION_TRACE
100         select ARCH_WANT_OPTIONAL_GPIOLIB
101         select VIRT_TO_BUS if !PPC64
102         select HAVE_IDE
103         select HAVE_IOREMAP_PROT
104         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
105         select HAVE_KPROBES
106         select HAVE_ARCH_KGDB
107         select HAVE_KRETPROBES
108         select HAVE_ARCH_TRACEHOOK
109         select HAVE_MEMBLOCK
110         select HAVE_MEMBLOCK_NODE_MAP
111         select HAVE_DMA_API_DEBUG
112         select HAVE_OPROFILE
113         select HAVE_DEBUG_KMEMLEAK
114         select ARCH_HAS_SG_CHAIN
115         select GENERIC_ATOMIC64 if PPC32
116         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
117         select HAVE_PERF_EVENTS
118         select HAVE_REGS_AND_STACK_ACCESS_API
119         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
120         select ARCH_WANT_IPC_PARSE_VERSION
121         select SPARSE_IRQ
122         select IRQ_DOMAIN
123         select GENERIC_IRQ_SHOW
124         select GENERIC_IRQ_SHOW_LEVEL
125         select IRQ_FORCED_THREADING
126         select HAVE_RCU_TABLE_FREE if SMP
127         select HAVE_SYSCALL_TRACEPOINTS
128         select HAVE_BPF_JIT
129         select HAVE_ARCH_JUMP_LABEL
130         select ARCH_HAVE_NMI_SAFE_CMPXCHG
131         select ARCH_HAS_GCOV_PROFILE_ALL
132         select GENERIC_SMP_IDLE_THREAD
133         select GENERIC_CMOS_UPDATE
134         select GENERIC_TIME_VSYSCALL_OLD
135         select GENERIC_CLOCKEVENTS
136         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
137         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
138         select GENERIC_STRNCPY_FROM_USER
139         select GENERIC_STRNLEN_USER
140         select HAVE_MOD_ARCH_SPECIFIC
141         select MODULES_USE_ELF_RELA
142         select CLONE_BACKWARDS
143         select ARCH_USE_BUILTIN_BSWAP
144         select OLD_SIGSUSPEND
145         select OLD_SIGACTION if PPC32
146         select HAVE_DEBUG_STACKOVERFLOW
147         select HAVE_IRQ_EXIT_ON_IRQ_STACK
148         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
149         select HAVE_ARCH_AUDITSYSCALL
150         select ARCH_SUPPORTS_ATOMIC_RMW
151         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
152         select NO_BOOTMEM
153         select HAVE_GENERIC_RCU_GUP
154         select HAVE_PERF_EVENTS_NMI if PPC64
155         select EDAC_SUPPORT
156         select EDAC_ATOMIC_SCRUB
157         select ARCH_HAS_DMA_SET_COHERENT_MASK
158         select ARCH_HAS_DEVMEM_IS_ALLOWED
159         select HAVE_ARCH_SECCOMP_FILTER
160         select ARCH_HAS_UBSAN_SANITIZE_ALL
161 
162 config GENERIC_CSUM
163         def_bool CPU_LITTLE_ENDIAN
164 
165 config EARLY_PRINTK
166         bool
167         default y
168 
169 config PANIC_TIMEOUT
170         int
171         default 180
172 
173 config COMPAT
174         bool
175         default y if PPC64
176         select COMPAT_BINFMT_ELF
177         select ARCH_WANT_OLD_COMPAT_IPC
178         select COMPAT_OLD_SIGACTION
179 
180 config SYSVIPC_COMPAT
181         bool
182         depends on COMPAT && SYSVIPC
183         default y
184 
185 # All PPC32s use generic nvram driver through ppc_md
186 config GENERIC_NVRAM
187         bool
188         default y if PPC32
189 
190 config SCHED_OMIT_FRAME_POINTER
191         bool
192         default y
193 
194 config ARCH_MAY_HAVE_PC_FDC
195         bool
196         default PCI
197 
198 config PPC_UDBG_16550
199         bool
200         default n
201 
202 config GENERIC_TBSYNC
203         bool
204         default y if PPC32 && SMP
205         default n
206 
207 config AUDIT_ARCH
208         bool
209         default y
210 
211 config GENERIC_BUG
212         bool
213         default y
214         depends on BUG
215 
216 config SYS_SUPPORTS_APM_EMULATION
217         default y if PMAC_APM_EMU
218         bool
219 
220 config EPAPR_BOOT
221         bool
222         help
223           Used to allow a board to specify it wants an ePAPR compliant wrapper.
224         default n
225 
226 config DEFAULT_UIMAGE
227         bool
228         help
229           Used to allow a board to specify it wants a uImage built by default
230         default n
231 
232 config ARCH_HIBERNATION_POSSIBLE
233         bool
234         default y
235 
236 config ARCH_SUSPEND_POSSIBLE
237         def_bool y
238         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
239                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
240                    || 44x || 40x
241 
242 config PPC_DCR_NATIVE
243         bool
244         default n
245 
246 config PPC_DCR_MMIO
247         bool
248         default n
249 
250 config PPC_DCR
251         bool
252         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
253         default y
254 
255 config PPC_OF_PLATFORM_PCI
256         bool
257         depends on PCI
258         depends on PPC64 # not supported on 32 bits yet
259         default n
260 
261 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
262         depends on PPC32 || PPC_STD_MMU_64
263         def_bool y
264 
265 config ARCH_SUPPORTS_UPROBES
266         def_bool y
267 
268 config PPC_ADV_DEBUG_REGS
269         bool
270         depends on 40x || BOOKE
271         default y
272 
273 config PPC_ADV_DEBUG_IACS
274         int
275         depends on PPC_ADV_DEBUG_REGS
276         default 4 if 44x
277         default 2
278 
279 config PPC_ADV_DEBUG_DACS
280         int
281         depends on PPC_ADV_DEBUG_REGS
282         default 2
283 
284 config PPC_ADV_DEBUG_DVCS
285         int
286         depends on PPC_ADV_DEBUG_REGS
287         default 2 if 44x
288         default 0
289 
290 config PPC_ADV_DEBUG_DAC_RANGE
291         bool
292         depends on PPC_ADV_DEBUG_REGS && 44x
293         default y
294 
295 config PPC_EMULATE_SSTEP
296         bool
297         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
298 
299 config ZONE_DMA32
300         bool
301         default y if PPC64
302 
303 config PGTABLE_LEVELS
304         int
305         default 2 if !PPC64
306         default 3 if PPC_64K_PAGES
307         default 4
308 
309 source "init/Kconfig"
310 
311 source "kernel/Kconfig.freezer"
312 
313 source "arch/powerpc/sysdev/Kconfig"
314 source "arch/powerpc/platforms/Kconfig"
315 
316 menu "Kernel options"
317 
318 config HIGHMEM
319         bool "High memory support"
320         depends on PPC32
321 
322 source kernel/Kconfig.hz
323 source kernel/Kconfig.preempt
324 source "fs/Kconfig.binfmt"
325 
326 config HUGETLB_PAGE_SIZE_VARIABLE
327         bool
328         depends on HUGETLB_PAGE
329         default y
330 
331 config MATH_EMULATION
332         bool "Math emulation"
333         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
334         ---help---
335           Some PowerPC chips designed for embedded applications do not have
336           a floating-point unit and therefore do not implement the
337           floating-point instructions in the PowerPC instruction set.  If you
338           say Y here, the kernel will include code to emulate a floating-point
339           unit, which will allow programs that use floating-point
340           instructions to run.
341 
342           This is also useful to emulate missing (optional) instructions
343           such as fsqrt on cores that do have an FPU but do not implement
344           them (such as Freescale BookE).
345 
346 choice
347         prompt "Math emulation options"
348         default MATH_EMULATION_FULL
349         depends on MATH_EMULATION
350 
351 config  MATH_EMULATION_FULL
352         bool "Emulate all the floating point instructions"
353         ---help---
354           Select this option will enable the kernel to support to emulate
355           all the floating point instructions. If your SoC doesn't have
356           a FPU, you should select this.
357 
358 config MATH_EMULATION_HW_UNIMPLEMENTED
359         bool "Just emulate the FPU unimplemented instructions"
360         ---help---
361           Select this if you know there does have a hardware FPU on your
362           SoC, but some floating point instructions are not implemented by that.
363 
364 endchoice
365 
366 config PPC_TRANSACTIONAL_MEM
367        bool "Transactional Memory support for POWERPC"
368        depends on PPC_BOOK3S_64
369        depends on SMP
370        select ALTIVEC
371        select VSX
372        default n
373        ---help---
374          Support user-mode Transactional Memory on POWERPC.
375 
376 config IOMMU_HELPER
377         def_bool PPC64
378 
379 config SWIOTLB
380         bool "SWIOTLB support"
381         default n
382         select IOMMU_HELPER
383         ---help---
384           Support for IO bounce buffering for systems without an IOMMU.
385           This allows us to DMA to the full physical address space on
386           platforms where the size of a physical address is larger
387           than the bus address.  Not all platforms support this.
388 
389 config HOTPLUG_CPU
390         bool "Support for enabling/disabling CPUs"
391         depends on SMP && (PPC_PSERIES || \
392         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
393         ---help---
394           Say Y here to be able to disable and re-enable individual
395           CPUs at runtime on SMP machines.
396 
397           Say N if you are unsure.
398 
399 config ARCH_CPU_PROBE_RELEASE
400         def_bool y
401         depends on HOTPLUG_CPU
402 
403 config ARCH_ENABLE_MEMORY_HOTPLUG
404         def_bool y
405 
406 config ARCH_HAS_WALK_MEMORY
407         def_bool y
408 
409 config ARCH_ENABLE_MEMORY_HOTREMOVE
410         def_bool y
411 
412 config PPC64_SUPPORTS_MEMORY_FAILURE
413         bool "Add support for memory hwpoison"
414         depends on PPC_BOOK3S_64
415         default "y" if PPC_POWERNV
416         select ARCH_SUPPORTS_MEMORY_FAILURE
417 
418 config KEXEC
419         bool "kexec system call"
420         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
421         select KEXEC_CORE
422         help
423           kexec is a system call that implements the ability to shutdown your
424           current kernel, and to start another kernel.  It is like a reboot
425           but it is independent of the system firmware.   And like a reboot
426           you can start any kernel with it, not just Linux.
427 
428           The name comes from the similarity to the exec system call.
429 
430           It is an ongoing process to be certain the hardware in a machine
431           is properly shutdown, so do not be surprised if this code does not
432           initially work for you.  As of this writing the exact hardware
433           interface is strongly in flux, so no good recommendation can be
434           made.
435 
436 config CRASH_DUMP
437         bool "Build a kdump crash kernel"
438         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
439         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
440         help
441           Build a kernel suitable for use as a kdump capture kernel.
442           The same kernel binary can be used as production kernel and dump
443           capture kernel.
444 
445 config FA_DUMP
446         bool "Firmware-assisted dump"
447         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
448         help
449           A robust mechanism to get reliable kernel crash dump with
450           assistance from firmware. This approach does not use kexec,
451           instead firmware assists in booting the kdump kernel
452           while preserving memory contents. Firmware-assisted dump
453           is meant to be a kdump replacement offering robustness and
454           speed not possible without system firmware assistance.
455 
456           If unsure, say "N"
457 
458 config IRQ_ALL_CPUS
459         bool "Distribute interrupts on all CPUs by default"
460         depends on SMP
461         help
462           This option gives the kernel permission to distribute IRQs across
463           multiple CPUs.  Saying N here will route all IRQs to the first
464           CPU.  Generally saying Y is safe, although some problems have been
465           reported with SMP Power Macintoshes with this option enabled.
466 
467 config NUMA
468         bool "NUMA support"
469         depends on PPC64
470         default y if SMP && PPC_PSERIES
471 
472 config NODES_SHIFT
473         int
474         default "8" if PPC64
475         default "4"
476         depends on NEED_MULTIPLE_NODES
477 
478 config USE_PERCPU_NUMA_NODE_ID
479         def_bool y
480         depends on NUMA
481 
482 config HAVE_MEMORYLESS_NODES
483         def_bool y
484         depends on NUMA
485 
486 config ARCH_SELECT_MEMORY_MODEL
487         def_bool y
488         depends on PPC64
489 
490 config ARCH_FLATMEM_ENABLE
491         def_bool y
492         depends on (PPC64 && !NUMA) || PPC32
493 
494 config ARCH_SPARSEMEM_ENABLE
495         def_bool y
496         depends on PPC64
497         select SPARSEMEM_VMEMMAP_ENABLE
498 
499 config ARCH_SPARSEMEM_DEFAULT
500         def_bool y
501         depends on (SMP && PPC_PSERIES) || PPC_PS3
502 
503 config SYS_SUPPORTS_HUGETLBFS
504         bool
505 
506 source "mm/Kconfig"
507 
508 config ARCH_MEMORY_PROBE
509         def_bool y
510         depends on MEMORY_HOTPLUG
511 
512 # Some NUMA nodes have memory ranges that span
513 # other nodes.  Even though a pfn is valid and
514 # between a node's start and end pfns, it may not
515 # reside on that node.  See memmap_init_zone()
516 # for details.
517 config NODES_SPAN_OTHER_NODES
518         def_bool y
519         depends on NEED_MULTIPLE_NODES
520 
521 config STDBINUTILS
522         bool "Using standard binutils settings"
523         depends on 44x
524         default y
525         help
526           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
527           Note, that kernel will be able to run only those applications,
528           which had been compiled using binutils later than 2.17.50.0.3 with
529           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
530           the older binutils, you can patch them with a trivial patch, which
531           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
532 
533 choice
534         prompt "Page size"
535         default PPC_4K_PAGES
536         help
537           Select the kernel logical page size. Increasing the page size
538           will reduce software overhead at each page boundary, allow
539           hardware prefetch mechanisms to be more effective, and allow
540           larger dma transfers increasing IO efficiency and reducing
541           overhead. However the utilization of memory will increase.
542           For example, each cached file will using a multiple of the
543           page size to hold its contents and the difference between the
544           end of file and the end of page is wasted.
545 
546           Some dedicated systems, such as software raid serving with
547           accelerated calculations, have shown significant increases.
548 
549           If you configure a 64 bit kernel for 64k pages but the
550           processor does not support them, then the kernel will simulate
551           them with 4k pages, loading them on demand, but with the
552           reduced software overhead and larger internal fragmentation.
553           For the 32 bit kernel, a large page option will not be offered
554           unless it is supported by the configured processor.
555 
556           If unsure, choose 4K_PAGES.
557 
558 config PPC_4K_PAGES
559         bool "4k page size"
560         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
561 
562 config PPC_16K_PAGES
563         bool "16k page size"
564         depends on 44x || PPC_8xx
565 
566 config PPC_64K_PAGES
567         bool "64k page size"
568         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
569         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
570 
571 config PPC_256K_PAGES
572         bool "256k page size"
573         depends on 44x && !STDBINUTILS
574         help
575           Make the page size 256k.
576 
577           As the ELF standard only requires alignment to support page
578           sizes up to 64k, you will need to compile all of your user
579           space applications with a non-standard binutils settings
580           (see the STDBINUTILS description for details).
581 
582           Say N unless you know what you are doing.
583 
584 endchoice
585 
586 config FORCE_MAX_ZONEORDER
587         int "Maximum zone order"
588         range 9 64 if PPC64 && PPC_64K_PAGES
589         default "9" if PPC64 && PPC_64K_PAGES
590         range 13 64 if PPC64 && !PPC_64K_PAGES
591         default "13" if PPC64 && !PPC_64K_PAGES
592         range 9 64 if PPC32 && PPC_16K_PAGES
593         default "9" if PPC32 && PPC_16K_PAGES
594         range 7 64 if PPC32 && PPC_64K_PAGES
595         default "7" if PPC32 && PPC_64K_PAGES
596         range 5 64 if PPC32 && PPC_256K_PAGES
597         default "5" if PPC32 && PPC_256K_PAGES
598         range 11 64
599         default "11"
600         help
601           The kernel memory allocator divides physically contiguous memory
602           blocks into "zones", where each zone is a power of two number of
603           pages.  This option selects the largest power of two that the kernel
604           keeps in the memory allocator.  If you need to allocate very large
605           blocks of physically contiguous memory, then you may need to
606           increase this value.
607 
608           This config option is actually maximum order plus one. For example,
609           a value of 11 means that the largest free memory block is 2^10 pages.
610 
611           The page size is not necessarily 4KB.  For example, on 64-bit
612           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
613           this in mind when choosing a value for this option.
614 
615 config PPC_SUBPAGE_PROT
616         bool "Support setting protections for 4k subpages"
617         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
618         help
619           This option adds support for a system call to allow user programs
620           to set access permissions (read/write, readonly, or no access)
621           on the 4k subpages of each 64k page.
622 
623 config PPC_COPRO_BASE
624         bool
625         default n
626 
627 config SCHED_SMT
628         bool "SMT (Hyperthreading) scheduler support"
629         depends on PPC64 && SMP
630         help
631           SMT scheduler support improves the CPU scheduler's decision making
632           when dealing with POWER5 cpus at a cost of slightly increased
633           overhead in some places. If unsure say N here.
634 
635 config PPC_DENORMALISATION
636         bool "PowerPC denormalisation exception handling"
637         depends on PPC_BOOK3S_64
638         default "y" if PPC_POWERNV
639         ---help---
640           Add support for handling denormalisation of single precision
641           values.  Useful for bare metal only.  If unsure say Y here.
642 
643 config CMDLINE_BOOL
644         bool "Default bootloader kernel arguments"
645 
646 config CMDLINE
647         string "Initial kernel command string"
648         depends on CMDLINE_BOOL
649         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
650         help
651           On some platforms, there is currently no way for the boot loader to
652           pass arguments to the kernel. For these platforms, you can supply
653           some command-line options at build time by entering them here.  In
654           most cases you will need to specify the root device here.
655 
656 config CMDLINE_FORCE
657         bool "Always use the default kernel command string"
658         depends on CMDLINE_BOOL
659         help
660           Always use the default kernel command string, even if the boot
661           loader passes other arguments to the kernel.
662           This is useful if you cannot or don't want to change the
663           command-line options your boot loader passes to the kernel.
664 
665 config EXTRA_TARGETS
666         string "Additional default image types"
667         help
668           List additional targets to be built by the bootwrapper here (separated
669           by spaces).  This is useful for targets that depend of device tree
670           files in the .dts directory.
671 
672           Targets in this list will be build as part of the default build
673           target, or when the user does a 'make zImage' or a
674           'make zImage.initrd'.
675 
676           If unsure, leave blank
677 
678 config ARCH_WANTS_FREEZER_CONTROL
679         def_bool y
680         depends on ADB_PMU
681 
682 source kernel/power/Kconfig
683 
684 config SECCOMP
685         bool "Enable seccomp to safely compute untrusted bytecode"
686         depends on PROC_FS
687         default y
688         help
689           This kernel feature is useful for number crunching applications
690           that may need to compute untrusted bytecode during their
691           execution. By using pipes or other transports made available to
692           the process as file descriptors supporting the read/write
693           syscalls, it's possible to isolate those applications in
694           their own address space using seccomp. Once seccomp is
695           enabled via /proc/<pid>/seccomp, it cannot be disabled
696           and the task is only allowed to execute a few safe syscalls
697           defined by each seccomp mode.
698 
699           If unsure, say Y. Only embedded should say N here.
700 
701 endmenu
702 
703 config ISA_DMA_API
704         bool
705         default PCI
706 
707 menu "Bus options"
708 
709 config ISA
710         bool "Support for ISA-bus hardware"
711         depends on PPC_CHRP
712         select PPC_I8259
713         help
714           Find out whether you have ISA slots on your motherboard.  ISA is the
715           name of a bus system, i.e. the way the CPU talks to the other stuff
716           inside your box.  If you have an Apple machine, say N here; if you
717           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
718           embedded board, consult your board documentation.
719 
720 config ZONE_DMA
721         bool
722         default y
723 
724 config NEED_DMA_MAP_STATE
725         def_bool (PPC64 || NOT_COHERENT_CACHE)
726 
727 config NEED_SG_DMA_LENGTH
728         def_bool y
729 
730 config GENERIC_ISA_DMA
731         bool
732         depends on ISA_DMA_API
733         default y
734 
735 config PPC_INDIRECT_PCI
736         bool
737         depends on PCI
738         default y if 40x || 44x
739         default n
740 
741 config EISA
742         bool
743 
744 config SBUS
745         bool
746 
747 config FSL_SOC
748         bool
749 
750 config FSL_PCI
751         bool
752         select PPC_INDIRECT_PCI
753         select PCI_QUIRKS
754 
755 config FSL_PMC
756         bool
757         default y
758         depends on SUSPEND && (PPC_85xx || PPC_86xx)
759         help
760           Freescale MPC85xx/MPC86xx power management controller support
761           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
762 
763 config PPC4xx_CPM
764         bool
765         default y
766         depends on SUSPEND && (44x || 40x)
767         help
768           PPC4xx Clock Power Management (CPM) support (suspend/resume).
769           It also enables support for two different idle states (idle-wait
770           and idle-doze).
771 
772 config 4xx_SOC
773         bool
774 
775 config FSL_LBC
776         bool "Freescale Local Bus support"
777         depends on FSL_SOC
778         help
779           Enables reporting of errors from the Freescale local bus
780           controller.  Also contains some common code used by
781           drivers for specific local bus peripherals.
782 
783 config FSL_GTM
784         bool
785         depends on PPC_83xx || QUICC_ENGINE || CPM2
786         help
787           Freescale General-purpose Timers support
788 
789 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
790 config MCA
791         bool
792 
793 # Platforms that what PCI turned unconditionally just do select PCI
794 # in their config node.  Platforms that want to choose at config
795 # time should select PPC_PCI_CHOICE
796 config PPC_PCI_CHOICE
797         bool
798 
799 config PCI
800         bool "PCI support" if PPC_PCI_CHOICE
801         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
802                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
803         default PCI_QSPAN if !4xx && !CPM2 && 8xx
804         select GENERIC_PCI_IOMAP
805         help
806           Find out whether your system includes a PCI bus. PCI is the name of
807           a bus system, i.e. the way the CPU talks to the other stuff inside
808           your box.  If you say Y here, the kernel will include drivers and
809           infrastructure code to support PCI bus devices.
810 
811 config PCI_DOMAINS
812         def_bool PCI
813 
814 config PCI_SYSCALL
815         def_bool PCI
816 
817 config PCI_QSPAN
818         bool "QSpan PCI"
819         depends on !4xx && !CPM2 && 8xx
820         select PPC_I8259
821         help
822           Say Y here if you have a system based on a Motorola 8xx-series
823           embedded processor with a QSPAN PCI interface, otherwise say N.
824 
825 config PCI_8260
826         bool
827         depends on PCI && 8260
828         select PPC_INDIRECT_PCI
829         default y
830 
831 source "drivers/pci/pcie/Kconfig"
832 
833 source "drivers/pci/Kconfig"
834 
835 source "drivers/pcmcia/Kconfig"
836 
837 source "drivers/pci/hotplug/Kconfig"
838 
839 config HAS_RAPIDIO
840         bool
841         default n
842 
843 config RAPIDIO
844         tristate "RapidIO support"
845         depends on HAS_RAPIDIO || PCI
846         help
847           If you say Y here, the kernel will include drivers and
848           infrastructure code to support RapidIO interconnect devices.
849 
850 config FSL_RIO
851         bool "Freescale Embedded SRIO Controller support"
852         depends on RAPIDIO = y && HAS_RAPIDIO
853         default "n"
854         ---help---
855           Include support for RapidIO controller on Freescale embedded
856           processors (MPC8548, MPC8641, etc).
857 
858 source "drivers/rapidio/Kconfig"
859 
860 endmenu
861 
862 config NONSTATIC_KERNEL
863         bool
864         default n
865 
866 menu "Advanced setup"
867         depends on PPC32
868 
869 config ADVANCED_OPTIONS
870         bool "Prompt for advanced kernel configuration options"
871         help
872           This option will enable prompting for a variety of advanced kernel
873           configuration options.  These options can cause the kernel to not
874           work if they are set incorrectly, but can be used to optimize certain
875           aspects of kernel memory management.
876 
877           Unless you know what you are doing, say N here.
878 
879 comment "Default settings for advanced configuration options are used"
880         depends on !ADVANCED_OPTIONS
881 
882 config LOWMEM_SIZE_BOOL
883         bool "Set maximum low memory"
884         depends on ADVANCED_OPTIONS
885         help
886           This option allows you to set the maximum amount of memory which
887           will be used as "low memory", that is, memory which the kernel can
888           access directly, without having to set up a kernel virtual mapping.
889           This can be useful in optimizing the layout of kernel virtual
890           memory.
891 
892           Say N here unless you know what you are doing.
893 
894 config LOWMEM_SIZE
895         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
896         default "0x30000000"
897 
898 config LOWMEM_CAM_NUM_BOOL
899         bool "Set number of CAMs to use to map low memory"
900         depends on ADVANCED_OPTIONS && FSL_BOOKE
901         help
902           This option allows you to set the maximum number of CAM slots that
903           will be used to map low memory.  There are a limited number of slots
904           available and even more limited number that will fit in the L1 MMU.
905           However, using more entries will allow mapping more low memory.  This
906           can be useful in optimizing the layout of kernel virtual memory.
907 
908           Say N here unless you know what you are doing.
909 
910 config LOWMEM_CAM_NUM
911         depends on FSL_BOOKE
912         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
913         default 3
914 
915 config DYNAMIC_MEMSTART
916         bool "Enable page aligned dynamic load address for kernel"
917         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
918         select NONSTATIC_KERNEL
919         help
920           This option enables the kernel to be loaded at any page aligned
921           physical address. The kernel creates a mapping from KERNELBASE to 
922           the address where the kernel is loaded. The page size here implies
923           the TLB page size of the mapping for kernel on the particular platform.
924           Please refer to the init code for finding the TLB page size.
925 
926           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
927           kernel image, where the only restriction is the page aligned kernel
928           load address. When this option is enabled, the compile time physical 
929           address CONFIG_PHYSICAL_START is ignored.
930 
931           This option is overridden by CONFIG_RELOCATABLE
932 
933 config RELOCATABLE
934         bool "Build a relocatable kernel"
935         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
936         select NONSTATIC_KERNEL
937         help
938           This builds a kernel image that is capable of running at the
939           location the kernel is loaded at, without any alignment restrictions.
940           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
941 
942           One use is for the kexec on panic case where the recovery kernel
943           must live at a different physical address than the primary
944           kernel.
945 
946           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
947           it has been loaded at and the compile time physical addresses
948           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
949           setting can still be useful to bootwrappers that need to know the
950           load address of the kernel (eg. u-boot/mkimage).
951 
952 config RELOCATABLE_PPC32
953         def_bool y
954         depends on PPC32 && RELOCATABLE
955 
956 config PAGE_OFFSET_BOOL
957         bool "Set custom page offset address"
958         depends on ADVANCED_OPTIONS
959         help
960           This option allows you to set the kernel virtual address at which
961           the kernel will map low memory.  This can be useful in optimizing
962           the virtual memory layout of the system.
963 
964           Say N here unless you know what you are doing.
965 
966 config PAGE_OFFSET
967         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
968         default "0xc0000000"
969 
970 config KERNEL_START_BOOL
971         bool "Set custom kernel base address"
972         depends on ADVANCED_OPTIONS
973         help
974           This option allows you to set the kernel virtual address at which
975           the kernel will be loaded.  Normally this should match PAGE_OFFSET
976           however there are times (like kdump) that one might not want them
977           to be the same.
978 
979           Say N here unless you know what you are doing.
980 
981 config KERNEL_START
982         hex "Virtual address of kernel base" if KERNEL_START_BOOL
983         default PAGE_OFFSET if PAGE_OFFSET_BOOL
984         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
985         default "0xc0000000"
986 
987 config PHYSICAL_START_BOOL
988         bool "Set physical address where the kernel is loaded"
989         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
990         help
991           This gives the physical address where the kernel is loaded.
992 
993           Say N here unless you know what you are doing.
994 
995 config PHYSICAL_START
996         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
997         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
998         default "0x00000000"
999 
1000 config PHYSICAL_ALIGN
1001         hex
1002         default "0x04000000" if FSL_BOOKE
1003         help
1004           This value puts the alignment restrictions on physical address
1005           where kernel is loaded and run from. Kernel is compiled for an
1006           address which meets above alignment restriction.
1007 
1008 config TASK_SIZE_BOOL
1009         bool "Set custom user task size"
1010         depends on ADVANCED_OPTIONS
1011         help
1012           This option allows you to set the amount of virtual address space
1013           allocated to user tasks.  This can be useful in optimizing the
1014           virtual memory layout of the system.
1015 
1016           Say N here unless you know what you are doing.
1017 
1018 config TASK_SIZE
1019         hex "Size of user task space" if TASK_SIZE_BOOL
1020         default "0x80000000" if PPC_8xx
1021         default "0xc0000000"
1022 
1023 config CONSISTENT_SIZE_BOOL
1024         bool "Set custom consistent memory pool size"
1025         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1026         help
1027           This option allows you to set the size of the
1028           consistent memory pool.  This pool of virtual memory
1029           is used to make consistent memory allocations.
1030 
1031 config CONSISTENT_SIZE
1032         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1033         default "0x00200000" if NOT_COHERENT_CACHE
1034 
1035 config PIN_TLB
1036         bool "Pinned Kernel TLBs (860 ONLY)"
1037         depends on ADVANCED_OPTIONS && 8xx
1038 endmenu
1039 
1040 if PPC64
1041 config RELOCATABLE
1042         bool "Build a relocatable kernel"
1043         depends on !COMPILE_TEST
1044         select NONSTATIC_KERNEL
1045         help
1046           This builds a kernel image that is capable of running anywhere
1047           in the RMA (real memory area) at any 16k-aligned base address.
1048           The kernel is linked as a position-independent executable (PIE)
1049           and contains dynamic relocations which are processed early
1050           in the bootup process.
1051 
1052           One use is for the kexec on panic case where the recovery kernel
1053           must live at a different physical address than the primary
1054           kernel.
1055 
1056 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1057 config PAGE_OFFSET
1058         hex
1059         default "0xc000000000000000"
1060 config KERNEL_START
1061         hex
1062         default "0xc000000000000000"
1063 config PHYSICAL_START
1064         hex
1065         default "0x00000000"
1066 endif
1067 
1068 config  ARCH_RANDOM
1069         def_bool n
1070 
1071 source "net/Kconfig"
1072 
1073 source "drivers/Kconfig"
1074 
1075 source "fs/Kconfig"
1076 
1077 source "lib/Kconfig"
1078 
1079 source "arch/powerpc/Kconfig.debug"
1080 
1081 source "security/Kconfig"
1082 
1083 config KEYS_COMPAT
1084         bool
1085         depends on COMPAT && KEYS
1086         default y
1087 
1088 source "crypto/Kconfig"
1089 
1090 config PPC_LIB_RHEAP
1091         bool
1092 
1093 source "arch/powerpc/kvm/Kconfig"

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