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1# 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
a0ae9c7c 7source "arch/powerpc/platforms/Kconfig.cputype"
17e638bc 8
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9config PPC32
10 bool
11 default y if !PPC64
12
13config 64BIT
14 bool
15 default y if PPC64
16
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17config WORD_SIZE
18 int
19 default 64 if PPC64
20 default 32 if !PPC64
21
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22config PPC_MERGE
23 def_bool y
24
25config MMU
26 bool
27 default y
28
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29config GENERIC_CMOS_UPDATE
30 def_bool y
31
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32config GENERIC_TIME
33 def_bool y
34
35config GENERIC_TIME_VSYSCALL
36 def_bool y
37
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38config GENERIC_CLOCKEVENTS
39 def_bool y
40
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41config GENERIC_HARDIRQS
42 bool
43 default y
44
988c388a 45config HAVE_SETUP_PER_CPU_AREA
b32ef636 46 def_bool PPC64
47
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48config IRQ_PER_CPU
49 bool
50 default y
51
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52config RWSEM_GENERIC_SPINLOCK
53 bool
54
55config RWSEM_XCHGADD_ALGORITHM
56 bool
57 default y
58
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59config GENERIC_LOCKBREAK
60 bool
61 default y
62 depends on SMP && PREEMPT
63
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64config ARCH_HAS_ILOG2_U32
65 bool
ef55d53c 66 default y
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67
68config ARCH_HAS_ILOG2_U64
69 bool
ef55d53c 70 default y if 64BIT
f0d1b0b3 71
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72config GENERIC_HWEIGHT
73 bool
74 default y
75
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76config GENERIC_CALIBRATE_DELAY
77 bool
78 default y
79
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80config GENERIC_FIND_NEXT_BIT
81 bool
82 default y
83
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84config ARCH_NO_VIRT_TO_BUS
85 def_bool PPC64
86
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87config PPC
88 bool
89 default y
ec7748b5 90 select HAVE_IDE
42d4b839 91 select HAVE_OPROFILE
3f550096 92 select HAVE_KPROBES
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93
94config EARLY_PRINTK
95 bool
51d3082f 96 default y
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97
98config COMPAT
99 bool
100 default y if PPC64
01e31dba 101 select COMPAT_BINFMT_ELF
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102
103config SYSVIPC_COMPAT
104 bool
105 depends on COMPAT && SYSVIPC
106 default y
107
108# All PPC32s use generic nvram driver through ppc_md
109config GENERIC_NVRAM
110 bool
111 default y if PPC32
112
113config SCHED_NO_NO_OMIT_FRAME_POINTER
114 bool
115 default y
116
117config ARCH_MAY_HAVE_PC_FDC
118 bool
bed59275 119 default !PPC_PSERIES || PCI
14cf11af 120
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121config PPC_OF
122 def_bool y
123
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124config OF
125 def_bool y
126
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127config PPC_UDBG_16550
128 bool
129 default n
130
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131config GENERIC_TBSYNC
132 bool
133 default y if PPC32 && SMP
134 default n
135
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136config AUDIT_ARCH
137 bool
138 default y
139
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140config GENERIC_BUG
141 bool
142 default y
143 depends on BUG
144
b3028878 145config SYS_SUPPORTS_APM_EMULATION
58da10bb 146 default y if PMAC_APM_EMU
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147 bool
148
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149config DEFAULT_UIMAGE
150 bool
151 help
152 Used to allow a board to specify it wants a uImage built by default
153 default n
154
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155config REDBOOT
156 bool
157
801e4062 158config HIBERNATE_32
543b9fd3 159 bool
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160 depends on (PPC_PMAC && !SMP) || BROKEN
161 default y
162
163config HIBERNATE_64
164 bool
165 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
166 default y
167
168config ARCH_HIBERNATION_POSSIBLE
169 bool
170 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
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171 default y
172
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173config ARCH_SUSPEND_POSSIBLE
174 def_bool y
175 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
176
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177config PPC_DCR_NATIVE
178 bool
179 default n
180
181config PPC_DCR_MMIO
182 bool
183 default n
184
185config PPC_DCR
186 bool
187 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
188 default y
189
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190config PPC_OF_PLATFORM_PCI
191 bool
373a6da1 192 depends on PCI
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193 depends on PPC64 # not supported on 32 bits yet
194 default n
195
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196source "init/Kconfig"
197
a2d2e1ec 198source "arch/powerpc/sysdev/Kconfig"
4330f5da 199source "arch/powerpc/platforms/Kconfig"
14cf11af 200
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201menu "Kernel options"
202
203config HIGHMEM
204 bool "High memory support"
205 depends on PPC32
206
1ad74998 207source kernel/time/Kconfig
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208source kernel/Kconfig.hz
209source kernel/Kconfig.preempt
210source "fs/Kconfig.binfmt"
211
212# We optimistically allocate largepages from the VM, so make the limit
213# large enough (16MB). This badly named config option is actually
214# max order + 1
215config FORCE_MAX_ZONEORDER
216 int
217 depends on PPC64
02864867 218 default "9" if PPC_64K_PAGES
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219 default "13"
220
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221config HUGETLB_PAGE_SIZE_VARIABLE
222 bool
223 depends on HUGETLB_PAGE
224 default y
225
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226config MATH_EMULATION
227 bool "Math emulation"
4d52719a 228 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
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229 ---help---
230 Some PowerPC chips designed for embedded applications do not have
231 a floating-point unit and therefore do not implement the
232 floating-point instructions in the PowerPC instruction set. If you
233 say Y here, the kernel will include code to emulate a floating-point
234 unit, which will allow programs that use floating-point
235 instructions to run.
236
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237config 8XX_MINIMAL_FPEMU
238 bool "Minimal math emulation for 8xx"
239 depends on 8xx && !MATH_EMULATION
240 help
241 Older arch/ppc kernels still emulated a few floating point
242 instructions such as load and store, even when full math
243 emulation is disabled. Say "Y" here if you want to preserve
244 this behavior.
245
246 It is recommended that you build a soft-float userspace instead.
247
14cf11af 248config IOMMU_VMERGE
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249 bool "Enable IOMMU virtual merging"
250 depends on PPC64
251 default y
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252 help
253 Cause IO segments sent to a device for DMA to be merged virtually
254 by the IOMMU when they happen to have been allocated contiguously.
255 This doesn't add pressure to the IOMMU allocator. However, some
256 drivers don't support getting large merged segments coming back
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257 from *_map_sg().
258
259 Most drivers don't have this problem; it is safe to say Y here.
14cf11af 260
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261config IOMMU_HELPER
262 def_bool PPC64
263
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264config HOTPLUG_CPU
265 bool "Support for enabling/disabling CPUs"
266 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
267 ---help---
268 Say Y here to be able to disable and re-enable individual
269 CPUs at runtime on SMP machines.
270
271 Say N if you are unsure.
272
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273config ARCH_ENABLE_MEMORY_HOTPLUG
274 def_bool y
275
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276config ARCH_HAS_WALK_MEMORY
277 def_bool y
278
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279config ARCH_ENABLE_MEMORY_HOTREMOVE
280 def_bool y
281
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282config KEXEC
283 bool "kexec system call (EXPERIMENTAL)"
fd4ba7e2 284 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
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285 help
286 kexec is a system call that implements the ability to shutdown your
287 current kernel, and to start another kernel. It is like a reboot
1f1332f7 288 but it is independent of the system firmware. And like a reboot
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289 you can start any kernel with it, not just Linux.
290
1f1332f7 291 The name comes from the similarity to the exec system call.
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292
293 It is an ongoing process to be certain the hardware in a machine
294 is properly shutdown, so do not be surprised if this code does not
295 initially work for you. It may help to enable device hotplugging
296 support. As of this writing the exact hardware interface is
297 strongly in flux, so no good recommendation can be made.
298
e8625d46 299config CRASH_DUMP
cd9c99d7 300 bool "Build a kdump crash kernel (EXPERIMENTAL)"
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301 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
302 help
303 Build a kernel suitable for use as a kdump capture kernel.
304 The kernel will be linked at a different address than normal, and
305 so can only be used for Kdump.
306
307 Don't change this unless you know what you are doing.
308
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309config PPCBUG_NVRAM
310 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
311 default y if PPC_PREP
312
313config IRQ_ALL_CPUS
314 bool "Distribute interrupts on all CPUs by default"
315 depends on SMP && !MV64360
316 help
317 This option gives the kernel permission to distribute IRQs across
318 multiple CPUs. Saying N here will route all IRQs to the first
319 CPU. Generally saying Y is safe, although some problems have been
320 reported with SMP Power Macintoshes with this option enabled.
321
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322config NUMA
323 bool "NUMA support"
324 depends on PPC64
325 default y if SMP && PPC_PSERIES
326
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327config NODES_SHIFT
328 int
329 default "4"
330 depends on NEED_MULTIPLE_NODES
331
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332config ARCH_SELECT_MEMORY_MODEL
333 def_bool y
334 depends on PPC64
335
336config ARCH_FLATMEM_ENABLE
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337 def_bool y
338 depends on (PPC64 && !NUMA) || PPC32
14cf11af 339
45fb6cea 340config ARCH_SPARSEMEM_ENABLE
14cf11af 341 def_bool y
9100b205 342 depends on PPC64
d29eff7b 343 select SPARSEMEM_VMEMMAP_ENABLE
14cf11af 344
45fb6cea 345config ARCH_SPARSEMEM_DEFAULT
14cf11af 346 def_bool y
78bde53e 347 depends on (SMP && PPC_PSERIES) || PPC_PS3
14cf11af 348
c67c3cb4 349config ARCH_POPULATES_NODE_MAP
14cf11af 350 def_bool y
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351
352source "mm/Kconfig"
14cf11af 353
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354config ARCH_MEMORY_PROBE
355 def_bool y
356 depends on MEMORY_HOTPLUG
357
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358# Some NUMA nodes have memory ranges that span
359# other nodes. Even though a pfn is valid and
360# between a node's start and end pfns, it may not
361# reside on that node. See memmap_init_zone()
362# for details.
363config NODES_SPAN_OTHER_NODES
364 def_bool y
365 depends on NEED_MULTIPLE_NODES
366
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367config PPC_HAS_HASH_64K
368 bool
369 depends on PPC64
370 default n
371
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372config PPC_64K_PAGES
373 bool "64k page size"
863c84b9 374 depends on PPC64
16c2d476 375 select PPC_HAS_HASH_64K
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376 help
377 This option changes the kernel logical page size to 64k. On machines
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378 without processor support for 64k pages, the kernel will simulate
379 them by loading each individual 4k page on demand transparently,
380 while on hardware with such support, it will be used to map
381 normal application pages.
3c726f8d 382
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383config PPC_SUBPAGE_PROT
384 bool "Support setting protections for 4k subpages"
385 depends on PPC_64K_PAGES
386 help
387 This option adds support for a system call to allow user programs
388 to set access permissions (read/write, readonly, or no access)
389 on the 4k subpages of each 64k page.
390
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391config SCHED_SMT
392 bool "SMT (Hyperthreading) scheduler support"
393 depends on PPC64 && SMP
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394 help
395 SMT scheduler support improves the CPU scheduler's decision making
396 when dealing with POWER5 cpus at a cost of slightly increased
397 overhead in some places. If unsure say N here.
398
399config PROC_DEVICETREE
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400 bool "Support for device tree in /proc"
401 depends on PROC_FS
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402 help
403 This option adds a device-tree directory under /proc which contains
404 an image of the device tree that the kernel copies from Open
5f296755 405 Firmware or other boot firmware. If unsure, say Y here.
14cf11af 406
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407config CMDLINE_BOOL
408 bool "Default bootloader kernel arguments"
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409
410config CMDLINE
411 string "Initial kernel command string"
412 depends on CMDLINE_BOOL
413 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
414 help
415 On some platforms, there is currently no way for the boot loader to
416 pass arguments to the kernel. For these platforms, you can supply
417 some command-line options at build time by entering them here. In
418 most cases you will need to specify the root device here.
419
420if !44x || BROKEN
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421config ARCH_WANTS_FREEZER_CONTROL
422 def_bool y
423 depends on ADB_PMU
424
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425source kernel/power/Kconfig
426endif
427
428config SECCOMP
429 bool "Enable seccomp to safely compute untrusted bytecode"
430 depends on PROC_FS
431 default y
432 help
433 This kernel feature is useful for number crunching applications
434 that may need to compute untrusted bytecode during their
435 execution. By using pipes or other transports made available to
436 the process as file descriptors supporting the read/write
437 syscalls, it's possible to isolate those applications in
438 their own address space using seccomp. Once seccomp is
439 enabled via /proc/<pid>/seccomp, it cannot be disabled
440 and the task is only allowed to execute a few safe syscalls
441 defined by each seccomp mode.
442
443 If unsure, say Y. Only embedded should say N here.
444
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445config WANT_DEVICE_TREE
446 bool
447 default n
448
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449endmenu
450
451config ISA_DMA_API
452 bool
373a6da1 453 default !PPC_ISERIES || PCI
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454
455menu "Bus options"
456
457config ISA
458 bool "Support for ISA-bus hardware"
459 depends on PPC_PREP || PPC_CHRP
f9bd170a 460 select PPC_I8259
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461 help
462 Find out whether you have ISA slots on your motherboard. ISA is the
463 name of a bus system, i.e. the way the CPU talks to the other stuff
464 inside your box. If you have an Apple machine, say N here; if you
465 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
466 you have an embedded board, consult your board documentation.
467
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468config ZONE_DMA
469 bool
470 default y
471
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472config GENERIC_ISA_DMA
473 bool
474 depends on PPC64 || POWER4 || 6xx && !CPM2
475 default y
476
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477config PPC_INDIRECT_PCI
478 bool
479 depends on PCI
63dafe57 480 default y if 40x || 44x
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481 default n
482
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483config EISA
484 bool
485
486config SBUS
487 bool
488
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489config FSL_SOC
490 bool
491
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492config FSL_PCI
493 bool
494 select PPC_INDIRECT_PCI
495
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496# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
497config MCA
498 bool
499
500config PCI
53158620 501 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
bed59275 502 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
f9bdedb2 503 || PPC_PS3 || 44x
e177edcd 504 default y if !40x && !CPM2 && !8xx && !PPC_MPC512x && !PPC_83xx \
53158620 505 && !PPC_85xx && !PPC_86xx
f21f49ea 506 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
14cf11af 507 default PCI_QSPAN if !4xx && !CPM2 && 8xx
df87ef55 508 select ARCH_SUPPORTS_MSI
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509 help
510 Find out whether your system includes a PCI bus. PCI is the name of
511 a bus system, i.e. the way the CPU talks to the other stuff inside
512 your box. If you say Y here, the kernel will include drivers and
513 infrastructure code to support PCI bus devices.
514
515config PCI_DOMAINS
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516 def_bool PCI
517
518config PCI_SYSCALL
519 def_bool PCI
14cf11af 520
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521config PCI_QSPAN
522 bool "QSpan PCI"
523 depends on !4xx && !CPM2 && 8xx
f9bd170a 524 select PPC_I8259
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525 help
526 Say Y here if you have a system based on a Motorola 8xx-series
527 embedded processor with a QSPAN PCI interface, otherwise say N.
528
529config PCI_8260
530 bool
531 depends on PCI && 8260
25635c71 532 select PPC_INDIRECT_PCI
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533 default y
534
535config 8260_PCI9
4a3ecc62 536 bool "Enable workaround for MPC826x erratum PCI 9"
e00c5498 537 depends on PCI_8260 && !8272
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538 default y
539
540choice
4a3ecc62 541 prompt "IDMA channel for PCI 9 workaround"
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542 depends on 8260_PCI9
543
544config 8260_PCI9_IDMA1
545 bool "IDMA1"
546
547config 8260_PCI9_IDMA2
548 bool "IDMA2"
549
550config 8260_PCI9_IDMA3
551 bool "IDMA3"
552
553config 8260_PCI9_IDMA4
554 bool "IDMA4"
555
556endchoice
557
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558source "drivers/pci/pcie/Kconfig"
559
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560source "drivers/pci/Kconfig"
561
562source "drivers/pcmcia/Kconfig"
563
564source "drivers/pci/hotplug/Kconfig"
565
566endmenu
567
568menu "Advanced setup"
569 depends on PPC32
570
571config ADVANCED_OPTIONS
572 bool "Prompt for advanced kernel configuration options"
573 help
574 This option will enable prompting for a variety of advanced kernel
575 configuration options. These options can cause the kernel to not
576 work if they are set incorrectly, but can be used to optimize certain
577 aspects of kernel memory management.
578
579 Unless you know what you are doing, say N here.
580
581comment "Default settings for advanced configuration options are used"
582 depends on !ADVANCED_OPTIONS
583
584config HIGHMEM_START_BOOL
585 bool "Set high memory pool address"
586 depends on ADVANCED_OPTIONS && HIGHMEM
587 help
588 This option allows you to set the base address of the kernel virtual
589 area used to map high memory pages. This can be useful in
590 optimizing the layout of kernel virtual memory.
591
592 Say N here unless you know what you are doing.
593
594config HIGHMEM_START
595 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
596 default "0xfe000000"
597
598config LOWMEM_SIZE_BOOL
599 bool "Set maximum low memory"
600 depends on ADVANCED_OPTIONS
601 help
602 This option allows you to set the maximum amount of memory which
603 will be used as "low memory", that is, memory which the kernel can
604 access directly, without having to set up a kernel virtual mapping.
605 This can be useful in optimizing the layout of kernel virtual
606 memory.
607
608 Say N here unless you know what you are doing.
609
610config LOWMEM_SIZE
611 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
612 default "0x30000000"
613
614config KERNEL_START_BOOL
615 bool "Set custom kernel base address"
616 depends on ADVANCED_OPTIONS
617 help
618 This option allows you to set the kernel virtual address at which
619 the kernel will map low memory (the kernel image will be linked at
620 this address). This can be useful in optimizing the virtual memory
621 layout of the system.
622
623 Say N here unless you know what you are doing.
624
625config KERNEL_START
626 hex "Virtual address of kernel base" if KERNEL_START_BOOL
627 default "0xc0000000"
628
629config TASK_SIZE_BOOL
630 bool "Set custom user task size"
631 depends on ADVANCED_OPTIONS
632 help
633 This option allows you to set the amount of virtual address space
634 allocated to user tasks. This can be useful in optimizing the
635 virtual memory layout of the system.
636
637 Say N here unless you know what you are doing.
638
639config TASK_SIZE
640 hex "Size of user task space" if TASK_SIZE_BOOL
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641 default "0x80000000" if PPC_PREP || PPC_8xx
642 default "0xc0000000"
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643
644config CONSISTENT_START_BOOL
645 bool "Set custom consistent memory pool address"
646 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
647 help
648 This option allows you to set the base virtual address
4b3f686d 649 of the consistent memory pool. This pool of virtual
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650 memory is used to make consistent memory allocations.
651
652config CONSISTENT_START
653 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
ccf0d68e 654 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
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655 default "0xff100000" if NOT_COHERENT_CACHE
656
657config CONSISTENT_SIZE_BOOL
658 bool "Set custom consistent memory pool size"
659 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
660 help
4b3f686d 661 This option allows you to set the size of the
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662 consistent memory pool. This pool of virtual memory
663 is used to make consistent memory allocations.
664
665config CONSISTENT_SIZE
666 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
667 default "0x00200000" if NOT_COHERENT_CACHE
668
669config BOOT_LOAD_BOOL
670 bool "Set the boot link/load address"
671 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
672 help
673 This option allows you to set the initial load address of the zImage
674 or zImage.initrd file. This can be useful if you are on a board
675 which has a small amount of memory.
676
677 Say N here unless you know what you are doing.
678
679config BOOT_LOAD
680 hex "Link/load address for booting" if BOOT_LOAD_BOOL
681 default "0x00400000" if 40x || 8xx || 8260
682 default "0x01000000" if 44x
683 default "0x00800000"
684
685config PIN_TLB
686 bool "Pinned Kernel TLBs (860 ONLY)"
687 depends on ADVANCED_OPTIONS && 8xx
688endmenu
689
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690if PPC64
691config KERNEL_START
692 hex
eeb2d218 693 default "0xc000000000000000"
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694endif
695
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696source "net/Kconfig"
697
698source "drivers/Kconfig"
699
700source "fs/Kconfig"
701
702# XXX source "arch/ppc/8xx_io/Kconfig"
703
704# XXX source "arch/ppc/8260_io/Kconfig"
705
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706source "arch/powerpc/sysdev/qe_lib/Kconfig"
707
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708source "lib/Kconfig"
709
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710source "arch/powerpc/Kconfig.debug"
711
712source "security/Kconfig"
713
714config KEYS_COMPAT
715 bool
716 depends on COMPAT && KEYS
717 default y
718
719source "crypto/Kconfig"
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720
721config PPC_CLOCK
722 bool
723 default n
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724
725config PPC_LIB_RHEAP
726 bool
727