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 GENERIC_HWEIGHT
91 bool
92 default y
93
94config GENERIC_FIND_NEXT_BIT
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_DMA_ATTRS
125 select HAVE_DMA_API_DEBUG
126 select USE_GENERIC_SMP_HELPERS if SMP
127 select HAVE_OPROFILE
128 select HAVE_SYSCALL_WRAPPERS if PPC64
129 select GENERIC_ATOMIC64 if PPC32
130 select HAVE_IRQ_WORK
131 select HAVE_PERF_EVENTS
132 select HAVE_REGS_AND_STACK_ACCESS_API
133 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
134 select HAVE_GENERIC_HARDIRQS
135 select HAVE_SPARSE_IRQ
136 select IRQ_PER_CPU
137
138config EARLY_PRINTK
139 bool
140 default y
141
142config COMPAT
143 bool
144 default y if PPC64
145 select COMPAT_BINFMT_ELF
146
147config SYSVIPC_COMPAT
148 bool
149 depends on COMPAT && SYSVIPC
150 default y
151
152
153config GENERIC_NVRAM
154 bool
155 default y if PPC32
156
157config SCHED_OMIT_FRAME_POINTER
158 bool
159 default y
160
161config ARCH_MAY_HAVE_PC_FDC
162 bool
163 default !PPC_PSERIES || PCI
164
165config PPC_OF
166 def_bool y
167
168config PPC_UDBG_16550
169 bool
170 default n
171
172config GENERIC_TBSYNC
173 bool
174 default y if PPC32 && SMP
175 default n
176
177config AUDIT_ARCH
178 bool
179 default y
180
181config GENERIC_BUG
182 bool
183 default y
184 depends on BUG
185
186config SYS_SUPPORTS_APM_EMULATION
187 default y if PMAC_APM_EMU
188 bool
189
190config DEFAULT_UIMAGE
191 bool
192 help
193 Used to allow a board to specify it wants a uImage built by default
194 default n
195
196config REDBOOT
197 bool
198
199config ARCH_HIBERNATION_POSSIBLE
200 bool
201 default y
202
203config ARCH_SUSPEND_POSSIBLE
204 def_bool y
205 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
206 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
207
208config PPC_DCR_NATIVE
209 bool
210 default n
211
212config PPC_DCR_MMIO
213 bool
214 default n
215
216config PPC_DCR
217 bool
218 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
219 default y
220
221config PPC_OF_PLATFORM_PCI
222 bool
223 depends on PCI
224 depends on PPC64
225 default n
226
227config ARCH_SUPPORTS_DEBUG_PAGEALLOC
228 def_bool y
229
230config PPC_ADV_DEBUG_REGS
231 bool
232 depends on 40x || BOOKE
233 default y
234
235config PPC_ADV_DEBUG_IACS
236 int
237 depends on PPC_ADV_DEBUG_REGS
238 default 4 if 44x
239 default 2
240
241config PPC_ADV_DEBUG_DACS
242 int
243 depends on PPC_ADV_DEBUG_REGS
244 default 2
245
246config PPC_ADV_DEBUG_DVCS
247 int
248 depends on PPC_ADV_DEBUG_REGS
249 default 2 if 44x
250 default 0
251
252config PPC_ADV_DEBUG_DAC_RANGE
253 bool
254 depends on PPC_ADV_DEBUG_REGS && 44x
255 default y
256
257source "init/Kconfig"
258
259source "kernel/Kconfig.freezer"
260
261source "arch/powerpc/sysdev/Kconfig"
262source "arch/powerpc/platforms/Kconfig"
263
264menu "Kernel options"
265
266config HIGHMEM
267 bool "High memory support"
268 depends on PPC32
269
270source kernel/time/Kconfig
271source kernel/Kconfig.hz
272source kernel/Kconfig.preempt
273source "fs/Kconfig.binfmt"
274
275config HUGETLB_PAGE_SIZE_VARIABLE
276 bool
277 depends on HUGETLB_PAGE
278 default y
279
280config MATH_EMULATION
281 bool "Math emulation"
282 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
283 ---help---
284 Some PowerPC chips designed for embedded applications do not have
285 a floating-point unit and therefore do not implement the
286 floating-point instructions in the PowerPC instruction set. If you
287 say Y here, the kernel will include code to emulate a floating-point
288 unit, which will allow programs that use floating-point
289 instructions to run.
290
291config 8XX_MINIMAL_FPEMU
292 bool "Minimal math emulation for 8xx"
293 depends on 8xx && !MATH_EMULATION
294 help
295 Older arch/ppc kernels still emulated a few floating point
296 instructions such as load and store, even when full math
297 emulation is disabled. Say "Y" here if you want to preserve
298 this behavior.
299
300 It is recommended that you build a soft-float userspace instead.
301
302config IOMMU_HELPER
303 def_bool PPC64
304
305config SWIOTLB
306 bool "SWIOTLB support"
307 default n
308 select IOMMU_HELPER
309 ---help---
310 Support for IO bounce buffering for systems without an IOMMU.
311 This allows us to DMA to the full physical address space on
312 platforms where the size of a physical address is larger
313 than the bus address. Not all platforms support this.
314
315config HOTPLUG_CPU
316 bool "Support for enabling/disabling CPUs"
317 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
318 ---help---
319 Say Y here to be able to disable and re-enable individual
320 CPUs at runtime on SMP machines.
321
322 Say N if you are unsure.
323
324config ARCH_CPU_PROBE_RELEASE
325 def_bool y
326 depends on HOTPLUG_CPU
327
328config ARCH_ENABLE_MEMORY_HOTPLUG
329 def_bool y
330
331config ARCH_HAS_WALK_MEMORY
332 def_bool y
333
334config ARCH_ENABLE_MEMORY_HOTREMOVE
335 def_bool y
336
337config KEXEC
338 bool "kexec system call (EXPERIMENTAL)"
339 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
340 help
341 kexec is a system call that implements the ability to shutdown your
342 current kernel, and to start another kernel. It is like a reboot
343 but it is independent of the system firmware. And like a reboot
344 you can start any kernel with it, not just Linux.
345
346 The name comes from the similarity to the exec system call.
347
348 It is an ongoing process to be certain the hardware in a machine
349 is properly shutdown, so do not be surprised if this code does not
350 initially work for you. It may help to enable device hotplugging
351 support. As of this writing the exact hardware interface is
352 strongly in flux, so no good recommendation can be made.
353
354config CRASH_DUMP
355 bool "Build a kdump crash kernel"
356 depends on PPC64 || 6xx || FSL_BOOKE
357 select RELOCATABLE if PPC64 || FSL_BOOKE
358 help
359 Build a kernel suitable for use as a kdump capture kernel.
360 The same kernel binary can be used as production kernel and dump
361 capture kernel.
362
363config PHYP_DUMP
364 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
365 depends on PPC_PSERIES && EXPERIMENTAL
366 help
367 Hypervisor-assisted dump is meant to be a kdump replacement
368 offering robustness and speed not possible without system
369 hypervisor assistance.
370
371 If unsure, say "N"
372
373config PPCBUG_NVRAM
374 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
375 default y if PPC_PREP
376
377config IRQ_ALL_CPUS
378 bool "Distribute interrupts on all CPUs by default"
379 depends on SMP && !MV64360
380 help
381 This option gives the kernel permission to distribute IRQs across
382 multiple CPUs. Saying N here will route all IRQs to the first
383 CPU. Generally saying Y is safe, although some problems have been
384 reported with SMP Power Macintoshes with this option enabled.
385
386config NUMA
387 bool "NUMA support"
388 depends on PPC64
389 default y if SMP && PPC_PSERIES
390
391config NODES_SHIFT
392 int
393 default "8" if PPC64
394 default "4"
395 depends on NEED_MULTIPLE_NODES
396
397config MAX_ACTIVE_REGIONS
398 int
399 default "256" if PPC64
400 default "32"
401
402config ARCH_SELECT_MEMORY_MODEL
403 def_bool y
404 depends on PPC64
405
406config ARCH_FLATMEM_ENABLE
407 def_bool y
408 depends on (PPC64 && !NUMA) || PPC32
409
410config ARCH_SPARSEMEM_ENABLE
411 def_bool y
412 depends on PPC64
413 select SPARSEMEM_VMEMMAP_ENABLE
414
415config ARCH_SPARSEMEM_DEFAULT
416 def_bool y
417 depends on (SMP && PPC_PSERIES) || PPC_PS3
418
419config ARCH_POPULATES_NODE_MAP
420 def_bool y
421
422config SYS_SUPPORTS_HUGETLBFS
423 def_bool y
424 depends on PPC_BOOK3S_64
425
426source "mm/Kconfig"
427
428config ARCH_MEMORY_PROBE
429 def_bool y
430 depends on MEMORY_HOTPLUG
431
432
433
434
435
436
437config NODES_SPAN_OTHER_NODES
438 def_bool y
439 depends on NEED_MULTIPLE_NODES
440
441config PPC_HAS_HASH_64K
442 bool
443 depends on PPC64
444 default n
445
446config STDBINUTILS
447 bool "Using standard binutils settings"
448 depends on 44x
449 default y
450 help
451 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
452 Note, that kernel will be able to run only those applications,
453 which had been compiled using binutils later than 2.17.50.0.3 with
454 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
455 the older binutils, you can patch them with a trivial patch, which
456 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
457
458choice
459 prompt "Page size"
460 default PPC_4K_PAGES
461 help
462 Select the kernel logical page size. Increasing the page size
463 will reduce software overhead at each page boundary, allow
464 hardware prefetch mechanisms to be more effective, and allow
465 larger dma transfers increasing IO efficiency and reducing
466 overhead. However the utilization of memory will increase.
467 For example, each cached file will using a multiple of the
468 page size to hold its contents and the difference between the
469 end of file and the end of page is wasted.
470
471 Some dedicated systems, such as software raid serving with
472 accelerated calculations, have shown significant increases.
473
474 If you configure a 64 bit kernel for 64k pages but the
475 processor does not support them, then the kernel will simulate
476 them with 4k pages, loading them on demand, but with the
477 reduced software overhead and larger internal fragmentation.
478 For the 32 bit kernel, a large page option will not be offered
479 unless it is supported by the configured processor.
480
481 If unsure, choose 4K_PAGES.
482
483config PPC_4K_PAGES
484 bool "4k page size"
485
486config PPC_16K_PAGES
487 bool "16k page size" if 44x
488
489config PPC_64K_PAGES
490 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
491 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
492
493config PPC_256K_PAGES
494 bool "256k page size" if 44x
495 depends on !STDBINUTILS
496 help
497 Make the page size 256k.
498
499 As the ELF standard only requires alignment to support page
500 sizes up to 64k, you will need to compile all of your user
501 space applications with a non-standard binutils settings
502 (see the STDBINUTILS description for details).
503
504 Say N unless you know what you are doing.
505
506endchoice
507
508config FORCE_MAX_ZONEORDER
509 int "Maximum zone order"
510 range 9 64 if PPC64 && PPC_64K_PAGES
511 default "9" if PPC64 && PPC_64K_PAGES
512 range 13 64 if PPC64 && !PPC_64K_PAGES
513 default "13" if PPC64 && !PPC_64K_PAGES
514 range 9 64 if PPC32 && PPC_16K_PAGES
515 default "9" if PPC32 && PPC_16K_PAGES
516 range 7 64 if PPC32 && PPC_64K_PAGES
517 default "7" if PPC32 && PPC_64K_PAGES
518 range 5 64 if PPC32 && PPC_256K_PAGES
519 default "5" if PPC32 && PPC_256K_PAGES
520 range 11 64
521 default "11"
522 help
523 The kernel memory allocator divides physically contiguous memory
524 blocks into "zones", where each zone is a power of two number of
525 pages. This option selects the largest power of two that the kernel
526 keeps in the memory allocator. If you need to allocate very large
527 blocks of physically contiguous memory, then you may need to
528 increase this value.
529
530 This config option is actually maximum order plus one. For example,
531 a value of 11 means that the largest free memory block is 2^10 pages.
532
533 The page size is not necessarily 4KB. For example, on 64-bit
534 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
535 this in mind when choosing a value for this option.
536
537config PPC_SUBPAGE_PROT
538 bool "Support setting protections for 4k subpages"
539 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
540 help
541 This option adds support for a system call to allow user programs
542 to set access permissions (read/write, readonly, or no access)
543 on the 4k subpages of each 64k page.
544
545config SCHED_SMT
546 bool "SMT (Hyperthreading) scheduler support"
547 depends on PPC64 && SMP
548 help
549 SMT scheduler support improves the CPU scheduler's decision making
550 when dealing with POWER5 cpus at a cost of slightly increased
551 overhead in some places. If unsure say N here.
552
553config CMDLINE_BOOL
554 bool "Default bootloader kernel arguments"
555
556config CMDLINE
557 string "Initial kernel command string"
558 depends on CMDLINE_BOOL
559 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
560 help
561 On some platforms, there is currently no way for the boot loader to
562 pass arguments to the kernel. For these platforms, you can supply
563 some command-line options at build time by entering them here. In
564 most cases you will need to specify the root device here.
565
566config EXTRA_TARGETS
567 string "Additional default image types"
568 help
569 List additional targets to be built by the bootwrapper here (separated
570 by spaces). This is useful for targets that depend of device tree
571 files in the .dts directory.
572
573 Targets in this list will be build as part of the default build
574 target, or when the user does a 'make zImage' or a
575 'make zImage.initrd'.
576
577 If unsure, leave blank
578
579config ARCH_WANTS_FREEZER_CONTROL
580 def_bool y
581 depends on ADB_PMU
582
583source kernel/power/Kconfig
584
585config SECCOMP
586 bool "Enable seccomp to safely compute untrusted bytecode"
587 depends on PROC_FS
588 default y
589 help
590 This kernel feature is useful for number crunching applications
591 that may need to compute untrusted bytecode during their
592 execution. By using pipes or other transports made available to
593 the process as file descriptors supporting the read/write
594 syscalls, it's possible to isolate those applications in
595 their own address space using seccomp. Once seccomp is
596 enabled via /proc/<pid>/seccomp, it cannot be disabled
597 and the task is only allowed to execute a few safe syscalls
598 defined by each seccomp mode.
599
600 If unsure, say Y. Only embedded should say N here.
601
602endmenu
603
604config ISA_DMA_API
605 bool
606 default !PPC_ISERIES || PCI
607
608menu "Bus options"
609
610config ISA
611 bool "Support for ISA-bus hardware"
612 depends on PPC_PREP || PPC_CHRP
613 select PPC_I8259
614 help
615 Find out whether you have ISA slots on your motherboard. ISA is the
616 name of a bus system, i.e. the way the CPU talks to the other stuff
617 inside your box. If you have an Apple machine, say N here; if you
618 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
619 you have an embedded board, consult your board documentation.
620
621config ZONE_DMA
622 bool
623 default y
624
625config NEED_DMA_MAP_STATE
626 def_bool (PPC64 || NOT_COHERENT_CACHE)
627
628config NEED_SG_DMA_LENGTH
629 def_bool y
630
631config GENERIC_ISA_DMA
632 bool
633 depends on ISA_DMA_API
634 default y
635
636config PPC_INDIRECT_PCI
637 bool
638 depends on PCI
639 default y if 40x || 44x
640 default n
641
642config EISA
643 bool
644
645config SBUS
646 bool
647
648config FSL_SOC
649 bool
650
651config FSL_PCI
652 bool
653 select PPC_INDIRECT_PCI
654 select PCI_QUIRKS
655
656config FSL_PMC
657 bool
658 default y
659 depends on SUSPEND && (PPC_85xx || PPC_86xx)
660 help
661 Freescale MPC85xx/MPC86xx power management controller support
662 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
663
664config PPC4xx_CPM
665 bool
666 default y
667 depends on SUSPEND && (44x || 40x)
668 help
669 PPC4xx Clock Power Management (CPM) support (suspend/resume).
670 It also enables support for two different idle states (idle-wait
671 and idle-doze).
672
673config 4xx_SOC
674 bool
675
676config FSL_LBC
677 bool "Freescale Local Bus support"
678 depends on FSL_SOC
679 help
680 Enables reporting of errors from the Freescale local bus
681 controller. Also contains some common code used by
682 drivers for specific local bus peripherals.
683
684config FSL_GTM
685 bool
686 depends on PPC_83xx || QUICC_ENGINE || CPM2
687 help
688 Freescale General-purpose Timers support
689
690
691config MCA
692 bool
693
694
695
696
697config PPC_PCI_CHOICE
698 bool
699
700config PCI
701 bool "PCI support" if PPC_PCI_CHOICE
702 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
703 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
704 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
705 default PCI_QSPAN if !4xx && !CPM2 && 8xx
706 select ARCH_SUPPORTS_MSI
707 help
708 Find out whether your system includes a PCI bus. PCI is the name of
709 a bus system, i.e. the way the CPU talks to the other stuff inside
710 your box. If you say Y here, the kernel will include drivers and
711 infrastructure code to support PCI bus devices.
712
713config PCI_DOMAINS
714 def_bool PCI
715
716config PCI_SYSCALL
717 def_bool PCI
718
719config PCI_QSPAN
720 bool "QSpan PCI"
721 depends on !4xx && !CPM2 && 8xx
722 select PPC_I8259
723 help
724 Say Y here if you have a system based on a Motorola 8xx-series
725 embedded processor with a QSPAN PCI interface, otherwise say N.
726
727config PCI_8260
728 bool
729 depends on PCI && 8260
730 select PPC_INDIRECT_PCI
731 default y
732
733config 8260_PCI9
734 bool "Enable workaround for MPC826x erratum PCI 9"
735 depends on PCI_8260 && !8272
736 default y
737
738choice
739 prompt "IDMA channel for PCI 9 workaround"
740 depends on 8260_PCI9
741
742config 8260_PCI9_IDMA1
743 bool "IDMA1"
744
745config 8260_PCI9_IDMA2
746 bool "IDMA2"
747
748config 8260_PCI9_IDMA3
749 bool "IDMA3"
750
751config 8260_PCI9_IDMA4
752 bool "IDMA4"
753
754endchoice
755
756source "drivers/pci/pcie/Kconfig"
757
758source "drivers/pci/Kconfig"
759
760source "drivers/pcmcia/Kconfig"
761
762source "drivers/pci/hotplug/Kconfig"
763
764config HAS_RAPIDIO
765 bool
766 default n
767
768config RAPIDIO
769 bool "RapidIO support"
770 depends on HAS_RAPIDIO
771 help
772 If you say Y here, the kernel will include drivers and
773 infrastructure code to support RapidIO interconnect devices.
774
775source "drivers/rapidio/Kconfig"
776
777endmenu
778
779menu "Advanced setup"
780 depends on PPC32
781
782config ADVANCED_OPTIONS
783 bool "Prompt for advanced kernel configuration options"
784 help
785 This option will enable prompting for a variety of advanced kernel
786 configuration options. These options can cause the kernel to not
787 work if they are set incorrectly, but can be used to optimize certain
788 aspects of kernel memory management.
789
790 Unless you know what you are doing, say N here.
791
792comment "Default settings for advanced configuration options are used"
793 depends on !ADVANCED_OPTIONS
794
795config LOWMEM_SIZE_BOOL
796 bool "Set maximum low memory"
797 depends on ADVANCED_OPTIONS
798 help
799 This option allows you to set the maximum amount of memory which
800 will be used as "low memory", that is, memory which the kernel can
801 access directly, without having to set up a kernel virtual mapping.
802 This can be useful in optimizing the layout of kernel virtual
803 memory.
804
805 Say N here unless you know what you are doing.
806
807config LOWMEM_SIZE
808 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
809 default "0x30000000"
810
811config LOWMEM_CAM_NUM_BOOL
812 bool "Set number of CAMs to use to map low memory"
813 depends on ADVANCED_OPTIONS && FSL_BOOKE
814 help
815 This option allows you to set the maximum number of CAM slots that
816 will be used to map low memory. There are a limited number of slots
817 available and even more limited number that will fit in the L1 MMU.
818 However, using more entries will allow mapping more low memory. This
819 can be useful in optimizing the layout of kernel virtual memory.
820
821 Say N here unless you know what you are doing.
822
823config LOWMEM_CAM_NUM
824 depends on FSL_BOOKE
825 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
826 default 3
827
828config RELOCATABLE
829 bool "Build a relocatable kernel (EXPERIMENTAL)"
830 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
831 help
832 This builds a kernel image that is capable of running at the
833 location the kernel is loaded at (some alignment restrictions may
834 exist).
835
836 One use is for the kexec on panic case where the recovery kernel
837 must live at a different physical address than the primary
838 kernel.
839
840 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
841 it has been loaded at and the compile time physical addresses
842 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
843 setting can still be useful to bootwrappers that need to know the
844 load location of the kernel (eg. u-boot/mkimage).
845
846config PAGE_OFFSET_BOOL
847 bool "Set custom page offset address"
848 depends on ADVANCED_OPTIONS
849 help
850 This option allows you to set the kernel virtual address at which
851 the kernel will map low memory. This can be useful in optimizing
852 the virtual memory layout of the system.
853
854 Say N here unless you know what you are doing.
855
856config PAGE_OFFSET
857 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
858 default "0xc0000000"
859
860config KERNEL_START_BOOL
861 bool "Set custom kernel base address"
862 depends on ADVANCED_OPTIONS
863 help
864 This option allows you to set the kernel virtual address at which
865 the kernel will be loaded. Normally this should match PAGE_OFFSET
866 however there are times (like kdump) that one might not want them
867 to be the same.
868
869 Say N here unless you know what you are doing.
870
871config KERNEL_START
872 hex "Virtual address of kernel base" if KERNEL_START_BOOL
873 default PAGE_OFFSET if PAGE_OFFSET_BOOL
874 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
875 default "0xc0000000"
876
877config PHYSICAL_START_BOOL
878 bool "Set physical address where the kernel is loaded"
879 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
880 help
881 This gives the physical address where the kernel is loaded.
882
883 Say N here unless you know what you are doing.
884
885config PHYSICAL_START
886 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
887 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
888 default "0x00000000"
889
890config PHYSICAL_ALIGN
891 hex
892 default "0x04000000" if FSL_BOOKE
893 help
894 This value puts the alignment restrictions on physical address
895 where kernel is loaded and run from. Kernel is compiled for an
896 address which meets above alignment restriction.
897
898config TASK_SIZE_BOOL
899 bool "Set custom user task size"
900 depends on ADVANCED_OPTIONS
901 help
902 This option allows you to set the amount of virtual address space
903 allocated to user tasks. This can be useful in optimizing the
904 virtual memory layout of the system.
905
906 Say N here unless you know what you are doing.
907
908config TASK_SIZE
909 hex "Size of user task space" if TASK_SIZE_BOOL
910 default "0x80000000" if PPC_PREP || PPC_8xx
911 default "0xc0000000"
912
913config CONSISTENT_SIZE_BOOL
914 bool "Set custom consistent memory pool size"
915 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
916 help
917 This option allows you to set the size of the
918 consistent memory pool. This pool of virtual memory
919 is used to make consistent memory allocations.
920
921config CONSISTENT_SIZE
922 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
923 default "0x00200000" if NOT_COHERENT_CACHE
924
925config PIN_TLB
926 bool "Pinned Kernel TLBs (860 ONLY)"
927 depends on ADVANCED_OPTIONS && 8xx
928endmenu
929
930if PPC64
931config RELOCATABLE
932 bool "Build a relocatable kernel"
933 help
934 This builds a kernel image that is capable of running anywhere
935 in the RMA (real memory area) at any 16k-aligned base address.
936 The kernel is linked as a position-independent executable (PIE)
937 and contains dynamic relocations which are processed early
938 in the bootup process.
939
940 One use is for the kexec on panic case where the recovery kernel
941 must live at a different physical address than the primary
942 kernel.
943
944config PAGE_OFFSET
945 hex
946 default "0xc000000000000000"
947config KERNEL_START
948 hex
949 default "0xc000000000000000"
950config PHYSICAL_START
951 hex
952 default "0x00000000"
953endif
954
955source "net/Kconfig"
956
957source "drivers/Kconfig"
958
959source "fs/Kconfig"
960
961source "arch/powerpc/sysdev/qe_lib/Kconfig"
962
963source "lib/Kconfig"
964
965source "arch/powerpc/Kconfig.debug"
966
967source "security/Kconfig"
968
969config KEYS_COMPAT
970 bool
971 depends on COMPAT && KEYS
972 default y
973
974source "crypto/Kconfig"
975
976config PPC_CLOCK
977 bool
978 default n
979 select HAVE_CLK
980
981config PPC_LIB_RHEAP
982 bool
983
984source "arch/powerpc/kvm/Kconfig"
985
