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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
Johannes Berg17e638b2007-03-19 11:53:53 +010014config PPC_PM_NEEDS_RTC_LIB
15 bool
16 select RTC_LIB
17 default y if PM
18
Paul Mackerras14cf11a2005-09-26 16:04:21 +100019config PPC32
20 bool
21 default y if !PPC64
22
23config 64BIT
24 bool
25 default y if PPC64
26
27config PPC_MERGE
28 def_bool y
29
30config MMU
31 bool
32 default y
33
Paul Mackerras14cf11a2005-09-26 16:04:21 +100034config GENERIC_HARDIRQS
35 bool
36 default y
37
Ingo Molnar0d7012a2006-06-29 02:24:43 -070038config IRQ_PER_CPU
39 bool
40 default y
41
Paul Mackerras14cf11a2005-09-26 16:04:21 +100042config RWSEM_GENERIC_SPINLOCK
43 bool
44
45config RWSEM_XCHGADD_ALGORITHM
46 bool
47 default y
48
David Howellsf0d1b0b2006-12-08 02:37:49 -080049config ARCH_HAS_ILOG2_U32
50 bool
David Howellsef55d532006-12-08 02:37:53 -080051 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080052
53config ARCH_HAS_ILOG2_U64
54 bool
David Howellsef55d532006-12-08 02:37:53 -080055 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080056
Akinobu Mitae779b2f2006-03-26 01:39:33 -080057config GENERIC_HWEIGHT
58 bool
59 default y
60
Paul Mackerras14cf11a2005-09-26 16:04:21 +100061config GENERIC_CALIBRATE_DELAY
62 bool
63 default y
64
Jon Mason0a9cb462006-05-19 15:35:32 -050065config GENERIC_FIND_NEXT_BIT
66 bool
67 default y
68
Paul Mackerras14cf11a2005-09-26 16:04:21 +100069config PPC
70 bool
71 default y
72
73config EARLY_PRINTK
74 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +110075 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +100076
77config COMPAT
78 bool
79 default y if PPC64
80
81config SYSVIPC_COMPAT
82 bool
83 depends on COMPAT && SYSVIPC
84 default y
85
86# All PPC32s use generic nvram driver through ppc_md
87config GENERIC_NVRAM
88 bool
89 default y if PPC32
90
91config SCHED_NO_NO_OMIT_FRAME_POINTER
92 bool
93 default y
94
95config ARCH_MAY_HAVE_PC_FDC
96 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +110097 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +100098
Kumar Gala08264cb2006-01-10 21:43:56 -060099config PPC_OF
100 def_bool y
101
102config PPC_UDBG_16550
103 bool
104 default n
105
Kumar Gala08264cb2006-01-10 21:43:56 -0600106config GENERIC_TBSYNC
107 bool
108 default y if PPC32 && SMP
109 default n
110
Al Viroe65e1fc2006-09-12 03:04:40 -0400111config AUDIT_ARCH
112 bool
113 default y
114
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800115config GENERIC_BUG
116 bool
117 default y
118 depends on BUG
119
Johannes Bergb3028872007-03-20 05:18:02 +1100120config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500121 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100122 bool
123
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600124config DEFAULT_UIMAGE
125 bool
126 help
127 Used to allow a board to specify it wants a uImage built by default
128 default n
129
Johannes Berg543b9fd2007-05-03 22:31:38 +1000130config PPC64_SWSUSP
131 bool
132 depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
133 default y
134
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000135menu "Processor support"
136choice
137 prompt "Processor Type"
138 depends on PPC32
139 default 6xx
140
Kumar Gala08264cb2006-01-10 21:43:56 -0600141config CLASSIC32
Grant Likely650f3282006-12-04 17:29:13 -0700142 bool "52xx/6xx/7xx/74xx"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000143 select PPC_FPU
Kumar Gala08264cb2006-01-10 21:43:56 -0600144 select 6xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000145 help
146 There are four families of PowerPC chips supported. The more common
147 types (601, 603, 604, 740, 750, 7400), the Motorola embedded
148 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
149 embedded versions (403 and 405) and the high end 64 bit Power
150 processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
Grant Likely650f3282006-12-04 17:29:13 -0700151
152 This option is the catch-all for 6xx types, including some of the
153 embedded versions. Unless there is see an option for the specific
154 chip family you are using, you want this option.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000155
Grant Likely650f3282006-12-04 17:29:13 -0700156 You do not want this if you are building a kernel for a 64 bit
157 IBM RS/6000 or an Apple G5, choose 6xx.
158
159 If unsure, select this option
160
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000161 Note that the kernel runs in 32-bit mode even on 64-bit chips.
162
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000163config PPC_82xx
164 bool "Freescale 82xx"
Kumar Gala08264cb2006-01-10 21:43:56 -0600165 select 6xx
166 select PPC_FPU
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000167
168config PPC_83xx
169 bool "Freescale 83xx"
Kumar Gala08264cb2006-01-10 21:43:56 -0600170 select 6xx
171 select FSL_SOC
172 select 83xx
173 select PPC_FPU
Scott Wood270429b2007-04-17 09:24:51 +1000174 select WANT_DEVICE_TREE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000175
Becky Bruce63dafe52006-01-14 16:57:39 -0600176config PPC_85xx
177 bool "Freescale 85xx"
178 select E500
179 select FSL_SOC
180 select 85xx
Scott Wood4536b932007-04-27 03:09:01 +1000181 select WANT_DEVICE_TREE
Becky Bruce63dafe52006-01-14 16:57:39 -0600182
Jon Loeligerc9b484b2006-06-17 17:52:35 -0500183config PPC_86xx
184 bool "Freescale 86xx"
185 select 6xx
186 select FSL_SOC
Jon Loeliger3e4e97f2007-03-07 14:48:45 -0600187 select FSL_PCIE
Jon Loeligerc9b484b2006-06-17 17:52:35 -0500188 select PPC_FPU
189 select ALTIVEC
190 help
191 The Freescale E600 SoCs have 74xx cores.
192
Vitaly Bordug5902ebc2007-01-24 22:41:06 +0300193config PPC_8xx
194 bool "Freescale 8xx"
195 select FSL_SOC
196 select 8xx
197
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000198config 40x
199 bool "AMCC 40x"
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100200 select PPC_DCR_NATIVE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000201
202config 44x
203 bool "AMCC 44x"
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100204 select PPC_DCR_NATIVE
David Gibsonf6dfc802007-05-08 14:10:01 +1000205 select WANT_DEVICE_TREE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000206
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000207config E200
208 bool "Freescale e200"
209
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000210endchoice
211
212config POWER4_ONLY
213 bool "Optimize for POWER4"
Paul Mackerras187a0062005-10-06 12:49:05 +1000214 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000215 default n
216 ---help---
217 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
218 The resulting binary will not work on POWER3 or RS64 processors
219 when compiled with binutils 2.15 or later.
220
221config POWER3
222 bool
Paul Mackerras187a0062005-10-06 12:49:05 +1000223 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000224 default y if !POWER4_ONLY
225
226config POWER4
Paul Mackerras187a0062005-10-06 12:49:05 +1000227 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000228 def_bool y
229
Kumar Gala08264cb2006-01-10 21:43:56 -0600230config 6xx
231 bool
232
233# this is temp to handle compat with arch=ppc
Vitaly Bordug5902ebc2007-01-24 22:41:06 +0300234config 8xx
235 bool
236
237# this is temp to handle compat with arch=ppc
Kumar Gala08264cb2006-01-10 21:43:56 -0600238config 83xx
239 bool
240
Becky Bruce63dafe52006-01-14 16:57:39 -0600241# this is temp to handle compat with arch=ppc
242config 85xx
243 bool
244
245config E500
246 bool
247
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000248config PPC_FPU
Paul Mackerras187a0062005-10-06 12:49:05 +1000249 bool
250 default y if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000251
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100252config PPC_DCR_NATIVE
253 bool
254 default n
255
256config PPC_DCR_MMIO
257 bool
258 default n
259
260config PPC_DCR
261 bool
262 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
263 default y
264
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100265config PPC_OF_PLATFORM_PCI
266 bool
267 depends on PPC64 # not supported on 32 bits yet
268 default n
269
David Gibsonf6dfc802007-05-08 14:10:01 +1000270config 4xx
271 bool
272 depends on 40x || 44x
273 default y
274
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000275config BOOKE
276 bool
David Gibsonf6dfc802007-05-08 14:10:01 +1000277 depends on E200 || E500 || 44x
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000278 default y
279
280config FSL_BOOKE
281 bool
282 depends on E200 || E500
283 default y
284
285config PTE_64BIT
286 bool
287 depends on 44x || E500
288 default y if 44x
289 default y if E500 && PHYS_64BIT
290
291config PHYS_64BIT
292 bool 'Large physical address support' if E500
293 depends on 44x || E500
Benjamin Herrenschmidt3d1ea8e2006-11-11 17:25:19 +1100294 select RESOURCES_64BIT
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000295 default y if 44x
296 ---help---
297 This option enables kernel support for larger than 32-bit physical
298 addresses. This features is not be available on all e500 cores.
299
300 If in doubt, say N here.
301
302config ALTIVEC
303 bool "AltiVec Support"
Kumar Gala08264cb2006-01-10 21:43:56 -0600304 depends on CLASSIC32 || POWER4
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000305 ---help---
306 This option enables kernel support for the Altivec extensions to the
307 PowerPC processor. The kernel currently supports saving and restoring
308 altivec registers, and turning on the 'altivec enable' bit so user
309 processes can execute altivec instructions.
310
311 This option is only usefully if you have a processor that supports
312 altivec (G4, otherwise known as 74xx series), but does not have
313 any affect on a non-altivec cpu (it does, however add code to the
314 kernel).
315
316 If in doubt, say Y here.
317
318config SPE
319 bool "SPE Support"
320 depends on E200 || E500
Becky Bruce63dafe52006-01-14 16:57:39 -0600321 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000322 ---help---
323 This option enables kernel support for the Signal Processing
324 Extensions (SPE) to the PowerPC processor. The kernel currently
325 supports saving and restoring SPE registers, and turning on the
326 'spe enable' bit so user processes can execute SPE instructions.
327
328 This option is only useful if you have a processor that supports
329 SPE (e500, otherwise known as 85xx series), but does not have any
330 effect on a non-spe cpu (it does, however add code to the kernel).
331
332 If in doubt, say Y here.
333
334config PPC_STD_MMU
335 bool
336 depends on 6xx || POWER3 || POWER4 || PPC64
337 default y
338
339config PPC_STD_MMU_32
340 def_bool y
341 depends on PPC_STD_MMU && PPC32
342
Benjamin Herrenschmidtd0f13e32007-05-08 16:27:27 +1000343config PPC_MM_SLICES
344 bool
345 default y if HUGETLB_PAGE
346 default n
347
Paul Mackerrasc6622f62006-02-24 10:06:59 +1100348config VIRT_CPU_ACCOUNTING
349 bool "Deterministic task and CPU time accounting"
350 depends on PPC64
351 default y
352 help
353 Select this option to enable more accurate task and CPU time
354 accounting. This is done by reading a CPU counter on each
355 kernel entry and exit and on transitions within the kernel
356 between system, softirq and hardirq state, so there is a
357 small performance impact. This also enables accounting of
358 stolen time on logically-partitioned systems running on
359 IBM POWER5-based machines.
360
361 If in doubt, say Y here.
362
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000363config SMP
364 depends on PPC_STD_MMU
365 bool "Symmetric multi-processing support"
366 ---help---
367 This enables support for systems with more than one CPU. If you have
368 a system with only one CPU, say N. If you have a system with more
369 than one CPU, say Y. Note that the kernel does not currently
370 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
371 since they have inadequate hardware support for multiprocessor
372 operation.
373
374 If you say N here, the kernel will run on single and multiprocessor
375 machines, but will use only one CPU of a multiprocessor machine. If
376 you say Y here, the kernel will run on single-processor machines.
377 On a single-processor machine, the kernel will run faster if you say
378 N here.
379
380 If you don't know what to do here, say N.
381
382config NR_CPUS
Olaf Heringe8a167a2005-12-01 21:10:10 +0100383 int "Maximum number of CPUs (2-128)"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000384 range 2 128
385 depends on SMP
386 default "32" if PPC64
387 default "4"
388
389config NOT_COHERENT_CACHE
390 bool
391 depends on 4xx || 8xx || E200
392 default y
Dale Farnsworth06cce432007-05-12 10:57:35 +1000393
394config CONFIG_CHECK_CACHE_COHERENCY
395 bool
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000396endmenu
397
398source "init/Kconfig"
399
Kumar Gala4330f5d2007-03-16 09:32:17 -0500400source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000401
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000402menu "Kernel options"
403
404config HIGHMEM
405 bool "High memory support"
406 depends on PPC32
407
408source kernel/Kconfig.hz
409source kernel/Kconfig.preempt
410source "fs/Kconfig.binfmt"
411
412# We optimistically allocate largepages from the VM, so make the limit
413# large enough (16MB). This badly named config option is actually
414# max order + 1
415config FORCE_MAX_ZONEORDER
416 int
417 depends on PPC64
Mike Kravetz02864862005-11-07 13:48:59 -0800418 default "9" if PPC_64K_PAGES
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000419 default "13"
420
421config MATH_EMULATION
422 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600423 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000424 ---help---
425 Some PowerPC chips designed for embedded applications do not have
426 a floating-point unit and therefore do not implement the
427 floating-point instructions in the PowerPC instruction set. If you
428 say Y here, the kernel will include code to emulate a floating-point
429 unit, which will allow programs that use floating-point
430 instructions to run.
431
432config IOMMU_VMERGE
433 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
434 depends on EXPERIMENTAL && PPC64
435 default n
436 help
437 Cause IO segments sent to a device for DMA to be merged virtually
438 by the IOMMU when they happen to have been allocated contiguously.
439 This doesn't add pressure to the IOMMU allocator. However, some
440 drivers don't support getting large merged segments coming back
441 from *_map_sg(). Say Y if you know the drivers you are using are
442 properly handling this case.
443
444config HOTPLUG_CPU
445 bool "Support for enabling/disabling CPUs"
446 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
447 ---help---
448 Say Y here to be able to disable and re-enable individual
449 CPUs at runtime on SMP machines.
450
451 Say N if you are unsure.
452
Yasunori Gotocc576372006-06-29 02:24:27 -0700453config ARCH_ENABLE_MEMORY_HOTPLUG
454 def_bool y
455
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000456config KEXEC
457 bool "kexec system call (EXPERIMENTAL)"
Dale Farnsworthfd4ba7e2007-05-12 10:58:43 +1000458 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000459 help
460 kexec is a system call that implements the ability to shutdown your
461 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400462 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000463 you can start any kernel with it, not just Linux.
464
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400465 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000466
467 It is an ongoing process to be certain the hardware in a machine
468 is properly shutdown, so do not be surprised if this code does not
469 initially work for you. It may help to enable device hotplugging
470 support. As of this writing the exact hardware interface is
471 strongly in flux, so no good recommendation can be made.
472
Haren Mynenie8625d462006-01-14 13:48:25 -0800473config CRASH_DUMP
Michael Ellermancd9c99d2006-03-10 15:01:08 +1100474 bool "Build a kdump crash kernel (EXPERIMENTAL)"
Haren Mynenie8625d462006-01-14 13:48:25 -0800475 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
476 help
477 Build a kernel suitable for use as a kdump capture kernel.
478 The kernel will be linked at a different address than normal, and
479 so can only be used for Kdump.
480
481 Don't change this unless you know what you are doing.
482
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000483config PPCBUG_NVRAM
484 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
485 default y if PPC_PREP
486
487config IRQ_ALL_CPUS
488 bool "Distribute interrupts on all CPUs by default"
489 depends on SMP && !MV64360
490 help
491 This option gives the kernel permission to distribute IRQs across
492 multiple CPUs. Saying N here will route all IRQs to the first
493 CPU. Generally saying Y is safe, although some problems have been
494 reported with SMP Power Macintoshes with this option enabled.
495
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700496config NUMA
497 bool "NUMA support"
498 depends on PPC64
499 default y if SMP && PPC_PSERIES
500
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700501config NODES_SHIFT
502 int
503 default "4"
504 depends on NEED_MULTIPLE_NODES
505
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000506config ARCH_SELECT_MEMORY_MODEL
507 def_bool y
508 depends on PPC64
509
510config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000511 def_bool y
512 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000513
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000514config ARCH_SPARSEMEM_ENABLE
515 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000516 depends on PPC64
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100517
518config ARCH_SPARSEMEM_DEFAULT
519 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100520 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000521
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700522config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000523 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700524
525source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000526
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800527config ARCH_MEMORY_PROBE
528 def_bool y
529 depends on MEMORY_HOTPLUG
530
Andy Whitcroft75167952006-10-21 10:24:14 -0700531# Some NUMA nodes have memory ranges that span
532# other nodes. Even though a pfn is valid and
533# between a node's start and end pfns, it may not
534# reside on that node. See memmap_init_zone()
535# for details.
536config NODES_SPAN_OTHER_NODES
537 def_bool y
538 depends on NEED_MULTIPLE_NODES
539
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000540config PPC_HAS_HASH_64K
541 bool
542 depends on PPC64
543 default n
544
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100545config PPC_64K_PAGES
546 bool "64k page size"
Benjamin Herrenschmidt863c84b2005-11-07 00:57:58 -0800547 depends on PPC64
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000548 select PPC_HAS_HASH_64K
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100549 help
550 This option changes the kernel logical page size to 64k. On machines
Kumar Gala98750262007-04-12 18:01:34 -0500551 without processor support for 64k pages, the kernel will simulate
552 them by loading each individual 4k page on demand transparently,
553 while on hardware with such support, it will be used to map
554 normal application pages.
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100555
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000556config SCHED_SMT
557 bool "SMT (Hyperthreading) scheduler support"
558 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000559 help
560 SMT scheduler support improves the CPU scheduler's decision making
561 when dealing with POWER5 cpus at a cost of slightly increased
562 overhead in some places. If unsure say N here.
563
564config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000565 bool "Support for device tree in /proc"
566 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000567 help
568 This option adds a device-tree directory under /proc which contains
569 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000570 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000571
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000572config CMDLINE_BOOL
573 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000574
575config CMDLINE
576 string "Initial kernel command string"
577 depends on CMDLINE_BOOL
578 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
579 help
580 On some platforms, there is currently no way for the boot loader to
581 pass arguments to the kernel. For these platforms, you can supply
582 some command-line options at build time by entering them here. In
583 most cases you will need to specify the root device here.
584
585if !44x || BROKEN
586source kernel/power/Kconfig
587endif
588
589config SECCOMP
590 bool "Enable seccomp to safely compute untrusted bytecode"
591 depends on PROC_FS
592 default y
593 help
594 This kernel feature is useful for number crunching applications
595 that may need to compute untrusted bytecode during their
596 execution. By using pipes or other transports made available to
597 the process as file descriptors supporting the read/write
598 syscalls, it's possible to isolate those applications in
599 their own address space using seccomp. Once seccomp is
600 enabled via /proc/<pid>/seccomp, it cannot be disabled
601 and the task is only allowed to execute a few safe syscalls
602 defined by each seccomp mode.
603
604 If unsure, say Y. Only embedded should say N here.
605
Scott Wood270429b2007-04-17 09:24:51 +1000606config WANT_DEVICE_TREE
607 bool
608 default n
609
610config DEVICE_TREE
611 string "Static device tree source file"
612 depends on WANT_DEVICE_TREE
613 help
614 This specifies the device tree source (.dts) file to be
615 compiled and included when building the bootwrapper. If a
616 relative filename is given, then it will be relative to
617 arch/powerpc/boot/dts. If you are not using the bootwrapper,
618 or do not need to build a dts into the bootwrapper, this
619 field is ignored.
620
621 For example, this is required when building a cuImage target
622 for an older U-Boot, which cannot pass a device tree itself.
623 Such a kernel will not work with a newer U-Boot that tries to
624 pass a device tree (unless you tell it not to). If your U-Boot
625 does not mention a device tree in "help bootm", then use the
626 cuImage target and specify a device tree here. Otherwise, use
627 the uImage target and leave this field blank.
628
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000629endmenu
630
631config ISA_DMA_API
632 bool
633 default y
634
635menu "Bus options"
636
637config ISA
638 bool "Support for ISA-bus hardware"
639 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000640 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000641 help
642 Find out whether you have ISA slots on your motherboard. ISA is the
643 name of a bus system, i.e. the way the CPU talks to the other stuff
644 inside your box. If you have an Apple machine, say N here; if you
645 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
646 you have an embedded board, consult your board documentation.
647
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800648config ZONE_DMA
649 bool
650 default y
651
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000652config GENERIC_ISA_DMA
653 bool
654 depends on PPC64 || POWER4 || 6xx && !CPM2
655 default y
656
Paul Mackerras25635c72005-10-26 16:36:55 +1000657config PPC_INDIRECT_PCI
658 bool
659 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600660 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000661 default n
662
Kumar Gala4a89f7f2007-04-12 15:41:26 -0500663config PPC_INDIRECT_PCI_BE
664 bool
665 depends PPC_INDIRECT_PCI
666 default n
667
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000668config EISA
669 bool
670
671config SBUS
672 bool
673
Kumar Gala08264cb2006-01-10 21:43:56 -0600674config FSL_SOC
675 bool
676
Jon Loeliger3e4e97f2007-03-07 14:48:45 -0600677config FSL_PCIE
678 bool
679 depends on PPC_86xx
680
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000681# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
682config MCA
683 bool
684
685config PCI
Jon Loeliger53158622006-08-09 10:37:28 -0500686 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
Stephen Rothwellbed59272007-03-04 17:04:44 +1100687 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
Josh Boyercb9e4d12007-05-08 07:28:38 +1000688 || MPC7448HPC2 || PPC_PS3 || PPC_HOLLY
Jon Loeliger53158622006-08-09 10:37:28 -0500689 default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
690 && !PPC_85xx && !PPC_86xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000691 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
692 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000693 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000694 help
695 Find out whether your system includes a PCI bus. PCI is the name of
696 a bus system, i.e. the way the CPU talks to the other stuff inside
697 your box. If you say Y here, the kernel will include drivers and
698 infrastructure code to support PCI bus devices.
699
700config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600701 def_bool PCI
702
703config PCI_SYSCALL
704 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000705
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000706config PCI_QSPAN
707 bool "QSpan PCI"
708 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000709 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000710 help
711 Say Y here if you have a system based on a Motorola 8xx-series
712 embedded processor with a QSPAN PCI interface, otherwise say N.
713
714config PCI_8260
715 bool
716 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000717 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000718 default y
719
720config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700721 bool "Enable workaround for MPC826x erratum PCI 9"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000722 depends on PCI_8260 && !ADS8272
723 default y
724
725choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700726 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000727 depends on 8260_PCI9
728
729config 8260_PCI9_IDMA1
730 bool "IDMA1"
731
732config 8260_PCI9_IDMA2
733 bool "IDMA2"
734
735config 8260_PCI9_IDMA3
736 bool "IDMA3"
737
738config 8260_PCI9_IDMA4
739 bool "IDMA4"
740
741endchoice
742
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500743source "drivers/pci/pcie/Kconfig"
744
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000745source "drivers/pci/Kconfig"
746
747source "drivers/pcmcia/Kconfig"
748
749source "drivers/pci/hotplug/Kconfig"
750
751endmenu
752
753menu "Advanced setup"
754 depends on PPC32
755
756config ADVANCED_OPTIONS
757 bool "Prompt for advanced kernel configuration options"
758 help
759 This option will enable prompting for a variety of advanced kernel
760 configuration options. These options can cause the kernel to not
761 work if they are set incorrectly, but can be used to optimize certain
762 aspects of kernel memory management.
763
764 Unless you know what you are doing, say N here.
765
766comment "Default settings for advanced configuration options are used"
767 depends on !ADVANCED_OPTIONS
768
769config HIGHMEM_START_BOOL
770 bool "Set high memory pool address"
771 depends on ADVANCED_OPTIONS && HIGHMEM
772 help
773 This option allows you to set the base address of the kernel virtual
774 area used to map high memory pages. This can be useful in
775 optimizing the layout of kernel virtual memory.
776
777 Say N here unless you know what you are doing.
778
779config HIGHMEM_START
780 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
781 default "0xfe000000"
782
783config LOWMEM_SIZE_BOOL
784 bool "Set maximum low memory"
785 depends on ADVANCED_OPTIONS
786 help
787 This option allows you to set the maximum amount of memory which
788 will be used as "low memory", that is, memory which the kernel can
789 access directly, without having to set up a kernel virtual mapping.
790 This can be useful in optimizing the layout of kernel virtual
791 memory.
792
793 Say N here unless you know what you are doing.
794
795config LOWMEM_SIZE
796 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
797 default "0x30000000"
798
799config KERNEL_START_BOOL
800 bool "Set custom kernel base address"
801 depends on ADVANCED_OPTIONS
802 help
803 This option allows you to set the kernel virtual address at which
804 the kernel will map low memory (the kernel image will be linked at
805 this address). This can be useful in optimizing the virtual memory
806 layout of the system.
807
808 Say N here unless you know what you are doing.
809
810config KERNEL_START
811 hex "Virtual address of kernel base" if KERNEL_START_BOOL
812 default "0xc0000000"
813
814config TASK_SIZE_BOOL
815 bool "Set custom user task size"
816 depends on ADVANCED_OPTIONS
817 help
818 This option allows you to set the amount of virtual address space
819 allocated to user tasks. This can be useful in optimizing the
820 virtual memory layout of the system.
821
822 Say N here unless you know what you are doing.
823
824config TASK_SIZE
825 hex "Size of user task space" if TASK_SIZE_BOOL
826 default "0x80000000"
827
828config CONSISTENT_START_BOOL
829 bool "Set custom consistent memory pool address"
830 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
831 help
832 This option allows you to set the base virtual address
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200833 of the consistent memory pool. This pool of virtual
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000834 memory is used to make consistent memory allocations.
835
836config CONSISTENT_START
837 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
838 default "0xff100000" if NOT_COHERENT_CACHE
839
840config CONSISTENT_SIZE_BOOL
841 bool "Set custom consistent memory pool size"
842 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
843 help
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200844 This option allows you to set the size of the
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000845 consistent memory pool. This pool of virtual memory
846 is used to make consistent memory allocations.
847
848config CONSISTENT_SIZE
849 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
850 default "0x00200000" if NOT_COHERENT_CACHE
851
852config BOOT_LOAD_BOOL
853 bool "Set the boot link/load address"
854 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
855 help
856 This option allows you to set the initial load address of the zImage
857 or zImage.initrd file. This can be useful if you are on a board
858 which has a small amount of memory.
859
860 Say N here unless you know what you are doing.
861
862config BOOT_LOAD
863 hex "Link/load address for booting" if BOOT_LOAD_BOOL
864 default "0x00400000" if 40x || 8xx || 8260
865 default "0x01000000" if 44x
866 default "0x00800000"
867
868config PIN_TLB
869 bool "Pinned Kernel TLBs (860 ONLY)"
870 depends on ADVANCED_OPTIONS && 8xx
871endmenu
872
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000873if PPC64
874config KERNEL_START
875 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000876 default "0xc000000000000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000877endif
878
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000879source "net/Kconfig"
880
881source "drivers/Kconfig"
882
883source "fs/Kconfig"
884
885# XXX source "arch/ppc/8xx_io/Kconfig"
886
887# XXX source "arch/ppc/8260_io/Kconfig"
888
Li Yang98658532006-10-03 23:10:46 -0500889source "arch/powerpc/sysdev/qe_lib/Kconfig"
890
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000891source "lib/Kconfig"
892
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800893menu "Instrumentation Support"
Kumar Gala98750262007-04-12 18:01:34 -0500894 depends on EXPERIMENTAL
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800895
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000896source "arch/powerpc/oprofile/Kconfig"
897
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800898config KPROBES
899 bool "Kprobes (EXPERIMENTAL)"
Kumar Gala82090032007-02-06 22:55:19 -0600900 depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800901 help
902 Kprobes allows you to trap at almost any kernel address and
903 execute a callback function. register_kprobe() establishes
904 a probepoint and specifies the callback. Kprobes is useful
905 for kernel debugging, non-intrusive instrumentation and testing.
906 If in doubt, say "N".
907endmenu
908
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000909source "arch/powerpc/Kconfig.debug"
910
911source "security/Kconfig"
912
913config KEYS_COMPAT
914 bool
915 depends on COMPAT && KEYS
916 default y
917
918source "crypto/Kconfig"