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Paul Mackerras14cf11a2005-09-26 16:04:21 +10001# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/kconfig-language.txt.
3#
4
5mainmenu "Linux/PowerPC Kernel Configuration"
6
7config PPC64
8 bool "64-bit kernel"
9 default n
10 help
11 This option selects whether a 32-bit or a 64-bit kernel
12 will be built.
13
14config PPC32
15 bool
16 default y if !PPC64
17
18config 64BIT
19 bool
20 default y if PPC64
21
22config PPC_MERGE
23 def_bool y
24
25config MMU
26 bool
27 default y
28
29config UID16
30 bool
31
32config GENERIC_HARDIRQS
33 bool
34 default y
35
36config RWSEM_GENERIC_SPINLOCK
37 bool
38
39config RWSEM_XCHGADD_ALGORITHM
40 bool
41 default y
42
43config GENERIC_CALIBRATE_DELAY
44 bool
45 default y
46
47config PPC
48 bool
49 default y
50
51config EARLY_PRINTK
52 bool
53 default y if PPC64
54
55config COMPAT
56 bool
57 default y if PPC64
58
59config SYSVIPC_COMPAT
60 bool
61 depends on COMPAT && SYSVIPC
62 default y
63
64# All PPC32s use generic nvram driver through ppc_md
65config GENERIC_NVRAM
66 bool
67 default y if PPC32
68
69config SCHED_NO_NO_OMIT_FRAME_POINTER
70 bool
71 default y
72
73config ARCH_MAY_HAVE_PC_FDC
74 bool
75 default y
76
77menu "Processor support"
78choice
79 prompt "Processor Type"
80 depends on PPC32
81 default 6xx
82
83config 6xx
84 bool "6xx/7xx/74xx"
85 select PPC_FPU
86 help
87 There are four families of PowerPC chips supported. The more common
88 types (601, 603, 604, 740, 750, 7400), the Motorola embedded
89 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
90 embedded versions (403 and 405) and the high end 64 bit Power
91 processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
92
93 Unless you are building a kernel for one of the embedded processor
94 systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx.
95 Note that the kernel runs in 32-bit mode even on 64-bit chips.
96
97config PPC_52xx
98 bool "Freescale 52xx"
99
100config PPC_82xx
101 bool "Freescale 82xx"
102
103config PPC_83xx
104 bool "Freescale 83xx"
105
106config 40x
107 bool "AMCC 40x"
108
109config 44x
110 bool "AMCC 44x"
111
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000112config 8xx
113 bool "Freescale 8xx"
114
115config E200
116 bool "Freescale e200"
117
118config E500
119 bool "Freescale e500"
120endchoice
121
122config POWER4_ONLY
123 bool "Optimize for POWER4"
Paul Mackerras187a0062005-10-06 12:49:05 +1000124 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000125 default n
126 ---help---
127 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
128 The resulting binary will not work on POWER3 or RS64 processors
129 when compiled with binutils 2.15 or later.
130
131config POWER3
132 bool
Paul Mackerras187a0062005-10-06 12:49:05 +1000133 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000134 default y if !POWER4_ONLY
135
136config POWER4
Paul Mackerras187a0062005-10-06 12:49:05 +1000137 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000138 def_bool y
139
140config PPC_FPU
Paul Mackerras187a0062005-10-06 12:49:05 +1000141 bool
142 default y if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000143
144config BOOKE
145 bool
146 depends on E200 || E500
147 default y
148
149config FSL_BOOKE
150 bool
151 depends on E200 || E500
152 default y
153
154config PTE_64BIT
155 bool
156 depends on 44x || E500
157 default y if 44x
158 default y if E500 && PHYS_64BIT
159
160config PHYS_64BIT
161 bool 'Large physical address support' if E500
162 depends on 44x || E500
163 default y if 44x
164 ---help---
165 This option enables kernel support for larger than 32-bit physical
166 addresses. This features is not be available on all e500 cores.
167
168 If in doubt, say N here.
169
170config ALTIVEC
171 bool "AltiVec Support"
172 depends on 6xx || POWER4
173 ---help---
174 This option enables kernel support for the Altivec extensions to the
175 PowerPC processor. The kernel currently supports saving and restoring
176 altivec registers, and turning on the 'altivec enable' bit so user
177 processes can execute altivec instructions.
178
179 This option is only usefully if you have a processor that supports
180 altivec (G4, otherwise known as 74xx series), but does not have
181 any affect on a non-altivec cpu (it does, however add code to the
182 kernel).
183
184 If in doubt, say Y here.
185
186config SPE
187 bool "SPE Support"
188 depends on E200 || E500
189 ---help---
190 This option enables kernel support for the Signal Processing
191 Extensions (SPE) to the PowerPC processor. The kernel currently
192 supports saving and restoring SPE registers, and turning on the
193 'spe enable' bit so user processes can execute SPE instructions.
194
195 This option is only useful if you have a processor that supports
196 SPE (e500, otherwise known as 85xx series), but does not have any
197 effect on a non-spe cpu (it does, however add code to the kernel).
198
199 If in doubt, say Y here.
200
201config PPC_STD_MMU
202 bool
203 depends on 6xx || POWER3 || POWER4 || PPC64
204 default y
205
206config PPC_STD_MMU_32
207 def_bool y
208 depends on PPC_STD_MMU && PPC32
209
210config SMP
211 depends on PPC_STD_MMU
212 bool "Symmetric multi-processing support"
213 ---help---
214 This enables support for systems with more than one CPU. If you have
215 a system with only one CPU, say N. If you have a system with more
216 than one CPU, say Y. Note that the kernel does not currently
217 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
218 since they have inadequate hardware support for multiprocessor
219 operation.
220
221 If you say N here, the kernel will run on single and multiprocessor
222 machines, but will use only one CPU of a multiprocessor machine. If
223 you say Y here, the kernel will run on single-processor machines.
224 On a single-processor machine, the kernel will run faster if you say
225 N here.
226
227 If you don't know what to do here, say N.
228
229config NR_CPUS
230 int "Maximum number of CPUs (2-32)"
231 range 2 128
232 depends on SMP
233 default "32" if PPC64
234 default "4"
235
236config NOT_COHERENT_CACHE
237 bool
238 depends on 4xx || 8xx || E200
239 default y
240endmenu
241
242source "init/Kconfig"
243
244menu "Platform support"
245 depends on PPC64 || 6xx
246
247choice
248 prompt "Machine type"
249 default PPC_MULTIPLATFORM
250
251config PPC_MULTIPLATFORM
252 bool "Generic desktop/server/laptop"
253 help
254 Select this option if configuring for an IBM pSeries or
255 RS/6000 machine, an Apple machine, or a PReP, CHRP,
256 Maple or Cell-based machine.
257
258config PPC_ISERIES
259 bool "IBM Legacy iSeries"
260 depends on PPC64
261
262config EMBEDDED6xx
263 bool "Embedded 6xx/7xx/7xxx-based board"
264 depends on PPC32
265
266config APUS
267 bool "Amiga-APUS"
268 depends on PPC32 && BROKEN
269 help
270 Select APUS if configuring for a PowerUP Amiga.
271 More information is available at:
272 <http://linux-apus.sourceforge.net/>.
273endchoice
274
275config PPC_PSERIES
276 depends on PPC_MULTIPLATFORM && PPC64
277 bool " IBM pSeries & new (POWER5-based) iSeries"
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000278 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000279 default y
280
281config PPC_CHRP
282 bool " Common Hardware Reference Platform (CHRP) based machines"
283 depends on PPC_MULTIPLATFORM && PPC32
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000284 select PPC_I8259
Paul Mackerras25635c72005-10-26 16:36:55 +1000285 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000286 default y
287
288config PPC_PMAC
289 bool " Apple PowerMac based machines"
290 depends on PPC_MULTIPLATFORM
Paul Mackerras25635c72005-10-26 16:36:55 +1000291 select PPC_INDIRECT_PCI if PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000292 default y
293
294config PPC_PMAC64
295 bool
296 depends on PPC_PMAC && POWER4
Paul Mackerras35499c02005-10-22 16:02:39 +1000297 select U3_DART
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000298 default y
299
300config PPC_PREP
301 bool " PowerPC Reference Platform (PReP) based machines"
302 depends on PPC_MULTIPLATFORM && PPC32
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000303 select PPC_I8259
Paul Mackerras25635c72005-10-26 16:36:55 +1000304 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000305 default y
306
307config PPC_MAPLE
308 depends on PPC_MULTIPLATFORM && PPC64
309 bool " Maple 970FX Evaluation Board"
310 select U3_DART
311 select MPIC_BROKEN_U3
312 default n
313 help
314 This option enables support for the Maple 970FX Evaluation Board.
315 For more informations, refer to <http://www.970eval.com>
316
317config PPC_BPA
318 bool " Broadband Processor Architecture"
319 depends on PPC_MULTIPLATFORM && PPC64
320
321config PPC_OF
322 bool
Paul Mackerras187a0062005-10-06 12:49:05 +1000323 depends on PPC_MULTIPLATFORM # for now
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000324 default y
325
326config XICS
327 depends on PPC_PSERIES
328 bool
329 default y
330
331config U3_DART
332 bool
333 depends on PPC_MULTIPLATFORM && PPC64
334 default n
335
336config MPIC
337 depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
338 bool
339 default y
340
341config MPIC_BROKEN_U3
342 bool
343 depends on PPC_MAPLE
344 default y
345
346config BPA_IIC
347 depends on PPC_BPA
348 bool
349 default y
350
351config IBMVIO
352 depends on PPC_PSERIES || PPC_ISERIES
353 bool
354 default y
355
356source "drivers/cpufreq/Kconfig"
357
358config CPU_FREQ_PMAC
359 bool "Support for Apple PowerBooks"
360 depends on CPU_FREQ && ADB_PMU && PPC32
361 select CPU_FREQ_TABLE
362 help
363 This adds support for frequency switching on Apple PowerBooks,
364 this currently includes some models of iBook & Titanium
365 PowerBook.
366
367config PPC601_SYNC_FIX
368 bool "Workarounds for PPC601 bugs"
369 depends on 6xx && (PPC_PREP || PPC_PMAC)
370 help
371 Some versions of the PPC601 (the first PowerPC chip) have bugs which
372 mean that extra synchronization instructions are required near
373 certain instructions, typically those that make major changes to the
374 CPU state. These extra instructions reduce performance slightly.
375 If you say N here, these extra instructions will not be included,
376 resulting in a kernel which will run faster but may not run at all
377 on some systems with the PPC601 chip.
378
379 If in doubt, say Y here.
380
381config TAU
382 bool "Thermal Management Support"
383 depends on 6xx
384 help
385 G3 and G4 processors have an on-chip temperature sensor called the
386 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
387 temperature within 2-4 degrees Celsius. This option shows the current
388 on-die temperature in /proc/cpuinfo if the cpu supports it.
389
390 Unfortunately, on some chip revisions, this sensor is very inaccurate
391 and in some cases, does not work at all, so don't assume the cpu
392 temp is actually what /proc/cpuinfo says it is.
393
394config TAU_INT
395 bool "Interrupt driven TAU driver (DANGEROUS)"
396 depends on TAU
397 ---help---
398 The TAU supports an interrupt driven mode which causes an interrupt
399 whenever the temperature goes out of range. This is the fastest way
400 to get notified the temp has exceeded a range. With this option off,
401 a timer is used to re-check the temperature periodically.
402
403 However, on some cpus it appears that the TAU interrupt hardware
404 is buggy and can cause a situation which would lead unexplained hard
405 lockups.
406
407 Unless you are extending the TAU driver, or enjoy kernel/hardware
408 debugging, leave this option off.
409
410config TAU_AVERAGE
411 bool "Average high and low temp"
412 depends on TAU
413 ---help---
414 The TAU hardware can compare the temperature to an upper and lower
415 bound. The default behavior is to show both the upper and lower
416 bound in /proc/cpuinfo. If the range is large, the temperature is
417 either changing a lot, or the TAU hardware is broken (likely on some
418 G4's). If the range is small (around 4 degrees), the temperature is
419 relatively stable. If you say Y here, a single temperature value,
420 halfway between the upper and lower bounds, will be reported in
421 /proc/cpuinfo.
422
423 If in doubt, say N here.
424endmenu
425
426source arch/powerpc/platforms/embedded6xx/Kconfig
427source arch/powerpc/platforms/4xx/Kconfig
428source arch/powerpc/platforms/85xx/Kconfig
429source arch/powerpc/platforms/8xx/Kconfig
430
431menu "Kernel options"
432
433config HIGHMEM
434 bool "High memory support"
435 depends on PPC32
436
437source kernel/Kconfig.hz
438source kernel/Kconfig.preempt
439source "fs/Kconfig.binfmt"
440
441# We optimistically allocate largepages from the VM, so make the limit
442# large enough (16MB). This badly named config option is actually
443# max order + 1
444config FORCE_MAX_ZONEORDER
445 int
446 depends on PPC64
447 default "13"
448
449config MATH_EMULATION
450 bool "Math emulation"
451 depends on 4xx || 8xx || E200 || E500
452 ---help---
453 Some PowerPC chips designed for embedded applications do not have
454 a floating-point unit and therefore do not implement the
455 floating-point instructions in the PowerPC instruction set. If you
456 say Y here, the kernel will include code to emulate a floating-point
457 unit, which will allow programs that use floating-point
458 instructions to run.
459
460config IOMMU_VMERGE
461 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
462 depends on EXPERIMENTAL && PPC64
463 default n
464 help
465 Cause IO segments sent to a device for DMA to be merged virtually
466 by the IOMMU when they happen to have been allocated contiguously.
467 This doesn't add pressure to the IOMMU allocator. However, some
468 drivers don't support getting large merged segments coming back
469 from *_map_sg(). Say Y if you know the drivers you are using are
470 properly handling this case.
471
472config HOTPLUG_CPU
473 bool "Support for enabling/disabling CPUs"
474 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
475 ---help---
476 Say Y here to be able to disable and re-enable individual
477 CPUs at runtime on SMP machines.
478
479 Say N if you are unsure.
480
481config KEXEC
482 bool "kexec system call (EXPERIMENTAL)"
483 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
484 help
485 kexec is a system call that implements the ability to shutdown your
486 current kernel, and to start another kernel. It is like a reboot
487 but it is indepedent of the system firmware. And like a reboot
488 you can start any kernel with it, not just Linux.
489
490 The name comes from the similiarity to the exec system call.
491
492 It is an ongoing process to be certain the hardware in a machine
493 is properly shutdown, so do not be surprised if this code does not
494 initially work for you. It may help to enable device hotplugging
495 support. As of this writing the exact hardware interface is
496 strongly in flux, so no good recommendation can be made.
497
498config EMBEDDEDBOOT
499 bool
500 depends on 8xx || 8260
501 default y
502
503config PC_KEYBOARD
504 bool "PC PS/2 style Keyboard"
505 depends on 4xx || CPM2
506
507config PPCBUG_NVRAM
508 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
509 default y if PPC_PREP
510
511config IRQ_ALL_CPUS
512 bool "Distribute interrupts on all CPUs by default"
513 depends on SMP && !MV64360
514 help
515 This option gives the kernel permission to distribute IRQs across
516 multiple CPUs. Saying N here will route all IRQs to the first
517 CPU. Generally saying Y is safe, although some problems have been
518 reported with SMP Power Macintoshes with this option enabled.
519
520source "arch/powerpc/platforms/pseries/Kconfig"
521
522config ARCH_SELECT_MEMORY_MODEL
523 def_bool y
524 depends on PPC64
525
526config ARCH_FLATMEM_ENABLE
527 def_bool y
528 depends on PPC64 && !NUMA
529
530config ARCH_DISCONTIGMEM_ENABLE
531 def_bool y
532 depends on SMP && PPC_PSERIES
533
534config ARCH_DISCONTIGMEM_DEFAULT
535 def_bool y
536 depends on ARCH_DISCONTIGMEM_ENABLE
537
538config ARCH_FLATMEM_ENABLE
539 def_bool y
540 depends on PPC64
541
542config ARCH_SPARSEMEM_ENABLE
543 def_bool y
544 depends on ARCH_DISCONTIGMEM_ENABLE
545
546source "mm/Kconfig"
547
548config HAVE_ARCH_EARLY_PFN_TO_NID
549 def_bool y
550 depends on NEED_MULTIPLE_NODES
551
552# Some NUMA nodes have memory ranges that span
553# other nodes. Even though a pfn is valid and
554# between a node's start and end pfns, it may not
555# reside on that node.
556#
557# This is a relatively temporary hack that should
558# be able to go away when sparsemem is fully in
559# place
560
561config NODES_SPAN_OTHER_NODES
562 def_bool y
563 depends on NEED_MULTIPLE_NODES
564
565config NUMA
566 bool "NUMA support"
567 default y if DISCONTIGMEM || SPARSEMEM
568
569config SCHED_SMT
570 bool "SMT (Hyperthreading) scheduler support"
571 depends on PPC64 && SMP
572 default off
573 help
574 SMT scheduler support improves the CPU scheduler's decision making
575 when dealing with POWER5 cpus at a cost of slightly increased
576 overhead in some places. If unsure say N here.
577
578config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000579 bool "Support for device tree in /proc"
580 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000581 help
582 This option adds a device-tree directory under /proc which contains
583 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000584 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000585
586source "arch/powerpc/platforms/prep/Kconfig"
587
588config CMDLINE_BOOL
589 bool "Default bootloader kernel arguments"
590 depends on !PPC_ISERIES
591
592config CMDLINE
593 string "Initial kernel command string"
594 depends on CMDLINE_BOOL
595 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
596 help
597 On some platforms, there is currently no way for the boot loader to
598 pass arguments to the kernel. For these platforms, you can supply
599 some command-line options at build time by entering them here. In
600 most cases you will need to specify the root device here.
601
602if !44x || BROKEN
603source kernel/power/Kconfig
604endif
605
606config SECCOMP
607 bool "Enable seccomp to safely compute untrusted bytecode"
608 depends on PROC_FS
609 default y
610 help
611 This kernel feature is useful for number crunching applications
612 that may need to compute untrusted bytecode during their
613 execution. By using pipes or other transports made available to
614 the process as file descriptors supporting the read/write
615 syscalls, it's possible to isolate those applications in
616 their own address space using seccomp. Once seccomp is
617 enabled via /proc/<pid>/seccomp, it cannot be disabled
618 and the task is only allowed to execute a few safe syscalls
619 defined by each seccomp mode.
620
621 If unsure, say Y. Only embedded should say N here.
622
623endmenu
624
625config ISA_DMA_API
626 bool
627 default y
628
629menu "Bus options"
630
631config ISA
632 bool "Support for ISA-bus hardware"
633 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000634 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000635 help
636 Find out whether you have ISA slots on your motherboard. ISA is the
637 name of a bus system, i.e. the way the CPU talks to the other stuff
638 inside your box. If you have an Apple machine, say N here; if you
639 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
640 you have an embedded board, consult your board documentation.
641
642config GENERIC_ISA_DMA
643 bool
644 depends on PPC64 || POWER4 || 6xx && !CPM2
645 default y
646
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000647config PPC_I8259
648 bool
649 default y if 85xx
650 default n
651
Paul Mackerras25635c72005-10-26 16:36:55 +1000652config PPC_INDIRECT_PCI
653 bool
654 depends on PCI
655 default y if 40x || 44x || 85xx || 83xx
656 default n
657
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000658config EISA
659 bool
660
661config SBUS
662 bool
663
664# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
665config MCA
666 bool
667
668config PCI
669 bool "PCI support" if 40x || CPM2 || 83xx || 85xx || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES)
670 default y if !40x && !CPM2 && !8xx && !APUS && !83xx && !85xx
671 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
672 default PCI_QSPAN if !4xx && !CPM2 && 8xx
673 help
674 Find out whether your system includes a PCI bus. PCI is the name of
675 a bus system, i.e. the way the CPU talks to the other stuff inside
676 your box. If you say Y here, the kernel will include drivers and
677 infrastructure code to support PCI bus devices.
678
679config PCI_DOMAINS
680 bool
681 default PCI
682
683config MPC83xx_PCI2
684 bool " Supprt for 2nd PCI host controller"
685 depends on PCI && MPC834x
686 default y if MPC834x_SYS
687
688config PCI_QSPAN
689 bool "QSpan PCI"
690 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000691 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000692 help
693 Say Y here if you have a system based on a Motorola 8xx-series
694 embedded processor with a QSPAN PCI interface, otherwise say N.
695
696config PCI_8260
697 bool
698 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000699 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000700 default y
701
702config 8260_PCI9
703 bool " Enable workaround for MPC826x erratum PCI 9"
704 depends on PCI_8260 && !ADS8272
705 default y
706
707choice
708 prompt " IDMA channel for PCI 9 workaround"
709 depends on 8260_PCI9
710
711config 8260_PCI9_IDMA1
712 bool "IDMA1"
713
714config 8260_PCI9_IDMA2
715 bool "IDMA2"
716
717config 8260_PCI9_IDMA3
718 bool "IDMA3"
719
720config 8260_PCI9_IDMA4
721 bool "IDMA4"
722
723endchoice
724
725source "drivers/pci/Kconfig"
726
727source "drivers/pcmcia/Kconfig"
728
729source "drivers/pci/hotplug/Kconfig"
730
731endmenu
732
733menu "Advanced setup"
734 depends on PPC32
735
736config ADVANCED_OPTIONS
737 bool "Prompt for advanced kernel configuration options"
738 help
739 This option will enable prompting for a variety of advanced kernel
740 configuration options. These options can cause the kernel to not
741 work if they are set incorrectly, but can be used to optimize certain
742 aspects of kernel memory management.
743
744 Unless you know what you are doing, say N here.
745
746comment "Default settings for advanced configuration options are used"
747 depends on !ADVANCED_OPTIONS
748
749config HIGHMEM_START_BOOL
750 bool "Set high memory pool address"
751 depends on ADVANCED_OPTIONS && HIGHMEM
752 help
753 This option allows you to set the base address of the kernel virtual
754 area used to map high memory pages. This can be useful in
755 optimizing the layout of kernel virtual memory.
756
757 Say N here unless you know what you are doing.
758
759config HIGHMEM_START
760 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
761 default "0xfe000000"
762
763config LOWMEM_SIZE_BOOL
764 bool "Set maximum low memory"
765 depends on ADVANCED_OPTIONS
766 help
767 This option allows you to set the maximum amount of memory which
768 will be used as "low memory", that is, memory which the kernel can
769 access directly, without having to set up a kernel virtual mapping.
770 This can be useful in optimizing the layout of kernel virtual
771 memory.
772
773 Say N here unless you know what you are doing.
774
775config LOWMEM_SIZE
776 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
777 default "0x30000000"
778
779config KERNEL_START_BOOL
780 bool "Set custom kernel base address"
781 depends on ADVANCED_OPTIONS
782 help
783 This option allows you to set the kernel virtual address at which
784 the kernel will map low memory (the kernel image will be linked at
785 this address). This can be useful in optimizing the virtual memory
786 layout of the system.
787
788 Say N here unless you know what you are doing.
789
790config KERNEL_START
791 hex "Virtual address of kernel base" if KERNEL_START_BOOL
792 default "0xc0000000"
793
794config TASK_SIZE_BOOL
795 bool "Set custom user task size"
796 depends on ADVANCED_OPTIONS
797 help
798 This option allows you to set the amount of virtual address space
799 allocated to user tasks. This can be useful in optimizing the
800 virtual memory layout of the system.
801
802 Say N here unless you know what you are doing.
803
804config TASK_SIZE
805 hex "Size of user task space" if TASK_SIZE_BOOL
806 default "0x80000000"
807
808config CONSISTENT_START_BOOL
809 bool "Set custom consistent memory pool address"
810 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
811 help
812 This option allows you to set the base virtual address
813 of the the consistent memory pool. This pool of virtual
814 memory is used to make consistent memory allocations.
815
816config CONSISTENT_START
817 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
818 default "0xff100000" if NOT_COHERENT_CACHE
819
820config CONSISTENT_SIZE_BOOL
821 bool "Set custom consistent memory pool size"
822 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
823 help
824 This option allows you to set the size of the the
825 consistent memory pool. This pool of virtual memory
826 is used to make consistent memory allocations.
827
828config CONSISTENT_SIZE
829 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
830 default "0x00200000" if NOT_COHERENT_CACHE
831
832config BOOT_LOAD_BOOL
833 bool "Set the boot link/load address"
834 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
835 help
836 This option allows you to set the initial load address of the zImage
837 or zImage.initrd file. This can be useful if you are on a board
838 which has a small amount of memory.
839
840 Say N here unless you know what you are doing.
841
842config BOOT_LOAD
843 hex "Link/load address for booting" if BOOT_LOAD_BOOL
844 default "0x00400000" if 40x || 8xx || 8260
845 default "0x01000000" if 44x
846 default "0x00800000"
847
848config PIN_TLB
849 bool "Pinned Kernel TLBs (860 ONLY)"
850 depends on ADVANCED_OPTIONS && 8xx
851endmenu
852
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000853if PPC64
854config KERNEL_START
855 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000856 default "0xc000000000000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000857endif
858
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000859source "net/Kconfig"
860
861source "drivers/Kconfig"
862
863source "fs/Kconfig"
864
865# XXX source "arch/ppc/8xx_io/Kconfig"
866
867# XXX source "arch/ppc/8260_io/Kconfig"
868
869source "arch/powerpc/platforms/iseries/Kconfig"
870
871source "lib/Kconfig"
872
873source "arch/powerpc/oprofile/Kconfig"
874
875source "arch/powerpc/Kconfig.debug"
876
877source "security/Kconfig"
878
879config KEYS_COMPAT
880 bool
881 depends on COMPAT && KEYS
882 default y
883
884source "crypto/Kconfig"