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14cf11af PM |
1 | # For a description of the syntax of this configuration file, |
2 | # see Documentation/kbuild/kconfig-language.txt. | |
3 | # | |
4 | ||
5 | mainmenu "Linux/PowerPC Kernel Configuration" | |
6 | ||
a0ae9c7c | 7 | source "arch/powerpc/platforms/Kconfig.cputype" |
17e638bc | 8 | |
14cf11af PM |
9 | config PPC32 |
10 | bool | |
11 | default y if !PPC64 | |
12 | ||
13 | config 64BIT | |
14 | bool | |
15 | default y if PPC64 | |
16 | ||
2578bfae SR |
17 | config WORD_SIZE |
18 | int | |
19 | default 64 if PPC64 | |
20 | default 32 if !PPC64 | |
21 | ||
14cf11af PM |
22 | config PPC_MERGE |
23 | def_bool y | |
24 | ||
25 | config MMU | |
26 | bool | |
27 | default y | |
28 | ||
aa3be5f3 TB |
29 | config GENERIC_CMOS_UPDATE |
30 | def_bool y | |
31 | ||
4a4cfe38 TB |
32 | config GENERIC_TIME |
33 | def_bool y | |
34 | ||
35 | config GENERIC_TIME_VSYSCALL | |
36 | def_bool y | |
37 | ||
d831d0b8 TB |
38 | config GENERIC_CLOCKEVENTS |
39 | def_bool y | |
40 | ||
14cf11af PM |
41 | config GENERIC_HARDIRQS |
42 | bool | |
43 | default y | |
44 | ||
988c388a | 45 | config HAVE_SETUP_PER_CPU_AREA |
b32ef636 | 46 | def_bool PPC64 |
47 | ||
0d7012a9 IM |
48 | config IRQ_PER_CPU |
49 | bool | |
50 | default y | |
51 | ||
14cf11af PM |
52 | config RWSEM_GENERIC_SPINLOCK |
53 | bool | |
54 | ||
55 | config RWSEM_XCHGADD_ALGORITHM | |
56 | bool | |
57 | default y | |
58 | ||
95c354fe NP |
59 | config GENERIC_LOCKBREAK |
60 | bool | |
61 | default y | |
62 | depends on SMP && PREEMPT | |
63 | ||
f0d1b0b3 DH |
64 | config ARCH_HAS_ILOG2_U32 |
65 | bool | |
ef55d53c | 66 | default y |
f0d1b0b3 DH |
67 | |
68 | config ARCH_HAS_ILOG2_U64 | |
69 | bool | |
ef55d53c | 70 | default y if 64BIT |
f0d1b0b3 | 71 | |
e779b2f9 AM |
72 | config GENERIC_HWEIGHT |
73 | bool | |
74 | default y | |
75 | ||
14cf11af PM |
76 | config GENERIC_CALIBRATE_DELAY |
77 | bool | |
78 | default y | |
79 | ||
0a9cb46a JM |
80 | config GENERIC_FIND_NEXT_BIT |
81 | bool | |
82 | default y | |
83 | ||
f057eac0 SR |
84 | config ARCH_NO_VIRT_TO_BUS |
85 | def_bool PPC64 | |
86 | ||
14cf11af PM |
87 | config PPC |
88 | bool | |
89 | default y | |
42d4b839 | 90 | select HAVE_OPROFILE |
3f550096 | 91 | select HAVE_KPROBES |
14cf11af PM |
92 | |
93 | config EARLY_PRINTK | |
94 | bool | |
51d3082f | 95 | default y |
14cf11af PM |
96 | |
97 | config COMPAT | |
98 | bool | |
99 | default y if PPC64 | |
100 | ||
101 | config SYSVIPC_COMPAT | |
102 | bool | |
103 | depends on COMPAT && SYSVIPC | |
104 | default y | |
105 | ||
106 | # All PPC32s use generic nvram driver through ppc_md | |
107 | config GENERIC_NVRAM | |
108 | bool | |
109 | default y if PPC32 | |
110 | ||
111 | config SCHED_NO_NO_OMIT_FRAME_POINTER | |
112 | bool | |
113 | default y | |
114 | ||
115 | config ARCH_MAY_HAVE_PC_FDC | |
116 | bool | |
bed59275 | 117 | default !PPC_PSERIES || PCI |
14cf11af | 118 | |
08264cbc KG |
119 | config PPC_OF |
120 | def_bool y | |
121 | ||
97e873e5 SR |
122 | config OF |
123 | def_bool y | |
124 | ||
08264cbc KG |
125 | config PPC_UDBG_16550 |
126 | bool | |
127 | default n | |
128 | ||
08264cbc KG |
129 | config GENERIC_TBSYNC |
130 | bool | |
131 | default y if PPC32 && SMP | |
132 | default n | |
133 | ||
e65e1fc2 AV |
134 | config AUDIT_ARCH |
135 | bool | |
136 | default y | |
137 | ||
73c9ceab JF |
138 | config GENERIC_BUG |
139 | bool | |
140 | default y | |
141 | depends on BUG | |
142 | ||
b3028878 | 143 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 144 | default y if PMAC_APM_EMU |
b3028878 JB |
145 | bool |
146 | ||
f4fc4a5b KG |
147 | config DEFAULT_UIMAGE |
148 | bool | |
149 | help | |
150 | Used to allow a board to specify it wants a uImage built by default | |
151 | default n | |
152 | ||
b09c1644 SW |
153 | config REDBOOT |
154 | bool | |
155 | ||
801e4062 | 156 | config HIBERNATE_32 |
543b9fd3 | 157 | bool |
801e4062 JB |
158 | depends on (PPC_PMAC && !SMP) || BROKEN |
159 | default y | |
160 | ||
161 | config HIBERNATE_64 | |
162 | bool | |
163 | depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL) | |
164 | default y | |
165 | ||
166 | config ARCH_HIBERNATION_POSSIBLE | |
167 | bool | |
168 | depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32) | |
543b9fd3 JB |
169 | default y |
170 | ||
f4cb5700 JB |
171 | config ARCH_SUSPEND_POSSIBLE |
172 | def_bool y | |
173 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 | |
174 | ||
4c75a6f4 BH |
175 | config PPC_DCR_NATIVE |
176 | bool | |
177 | default n | |
178 | ||
179 | config PPC_DCR_MMIO | |
180 | bool | |
181 | default n | |
182 | ||
183 | config PPC_DCR | |
184 | bool | |
185 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
186 | default y | |
187 | ||
4c9d2800 BH |
188 | config PPC_OF_PLATFORM_PCI |
189 | bool | |
373a6da1 | 190 | depends on PCI |
4c9d2800 BH |
191 | depends on PPC64 # not supported on 32 bits yet |
192 | default n | |
193 | ||
14cf11af PM |
194 | source "init/Kconfig" |
195 | ||
a2d2e1ec | 196 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 197 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 198 | |
14cf11af PM |
199 | menu "Kernel options" |
200 | ||
201 | config HIGHMEM | |
202 | bool "High memory support" | |
203 | depends on PPC32 | |
204 | ||
1ad74998 | 205 | source kernel/time/Kconfig |
14cf11af PM |
206 | source kernel/Kconfig.hz |
207 | source kernel/Kconfig.preempt | |
208 | source "fs/Kconfig.binfmt" | |
209 | ||
210 | # We optimistically allocate largepages from the VM, so make the limit | |
211 | # large enough (16MB). This badly named config option is actually | |
212 | # max order + 1 | |
213 | config FORCE_MAX_ZONEORDER | |
214 | int | |
215 | depends on PPC64 | |
02864867 | 216 | default "9" if PPC_64K_PAGES |
14cf11af PM |
217 | default "13" |
218 | ||
ba72cb8c MG |
219 | config HUGETLB_PAGE_SIZE_VARIABLE |
220 | bool | |
221 | depends on HUGETLB_PAGE | |
222 | default y | |
223 | ||
14cf11af PM |
224 | config MATH_EMULATION |
225 | bool "Math emulation" | |
4d52719a | 226 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
227 | ---help--- |
228 | Some PowerPC chips designed for embedded applications do not have | |
229 | a floating-point unit and therefore do not implement the | |
230 | floating-point instructions in the PowerPC instruction set. If you | |
231 | say Y here, the kernel will include code to emulate a floating-point | |
232 | unit, which will allow programs that use floating-point | |
233 | instructions to run. | |
234 | ||
5dd57a13 SW |
235 | config 8XX_MINIMAL_FPEMU |
236 | bool "Minimal math emulation for 8xx" | |
237 | depends on 8xx && !MATH_EMULATION | |
238 | help | |
239 | Older arch/ppc kernels still emulated a few floating point | |
240 | instructions such as load and store, even when full math | |
241 | emulation is disabled. Say "Y" here if you want to preserve | |
242 | this behavior. | |
243 | ||
244 | It is recommended that you build a soft-float userspace instead. | |
245 | ||
14cf11af | 246 | config IOMMU_VMERGE |
768cc2d3 LV |
247 | bool "Enable IOMMU virtual merging" |
248 | depends on PPC64 | |
249 | default y | |
14cf11af PM |
250 | help |
251 | Cause IO segments sent to a device for DMA to be merged virtually | |
252 | by the IOMMU when they happen to have been allocated contiguously. | |
253 | This doesn't add pressure to the IOMMU allocator. However, some | |
254 | drivers don't support getting large merged segments coming back | |
768cc2d3 LV |
255 | from *_map_sg(). |
256 | ||
257 | Most drivers don't have this problem; it is safe to say Y here. | |
14cf11af PM |
258 | |
259 | config HOTPLUG_CPU | |
260 | bool "Support for enabling/disabling CPUs" | |
261 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
262 | ---help--- | |
263 | Say Y here to be able to disable and re-enable individual | |
264 | CPUs at runtime on SMP machines. | |
265 | ||
266 | Say N if you are unsure. | |
267 | ||
cc57637b YG |
268 | config ARCH_ENABLE_MEMORY_HOTPLUG |
269 | def_bool y | |
270 | ||
14cf11af PM |
271 | config KEXEC |
272 | bool "kexec system call (EXPERIMENTAL)" | |
fd4ba7e2 | 273 | depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL |
14cf11af PM |
274 | help |
275 | kexec is a system call that implements the ability to shutdown your | |
276 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 277 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
278 | you can start any kernel with it, not just Linux. |
279 | ||
1f1332f7 | 280 | The name comes from the similarity to the exec system call. |
14cf11af PM |
281 | |
282 | It is an ongoing process to be certain the hardware in a machine | |
283 | is properly shutdown, so do not be surprised if this code does not | |
284 | initially work for you. It may help to enable device hotplugging | |
285 | support. As of this writing the exact hardware interface is | |
286 | strongly in flux, so no good recommendation can be made. | |
287 | ||
e8625d46 | 288 | config CRASH_DUMP |
cd9c99d7 | 289 | bool "Build a kdump crash kernel (EXPERIMENTAL)" |
e8625d46 HM |
290 | depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL |
291 | help | |
292 | Build a kernel suitable for use as a kdump capture kernel. | |
293 | The kernel will be linked at a different address than normal, and | |
294 | so can only be used for Kdump. | |
295 | ||
296 | Don't change this unless you know what you are doing. | |
297 | ||
14cf11af PM |
298 | config PPCBUG_NVRAM |
299 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
300 | default y if PPC_PREP | |
301 | ||
302 | config IRQ_ALL_CPUS | |
303 | bool "Distribute interrupts on all CPUs by default" | |
304 | depends on SMP && !MV64360 | |
305 | help | |
306 | This option gives the kernel permission to distribute IRQs across | |
307 | multiple CPUs. Saying N here will route all IRQs to the first | |
308 | CPU. Generally saying Y is safe, although some problems have been | |
309 | reported with SMP Power Macintoshes with this option enabled. | |
310 | ||
ffa27b6b AW |
311 | config NUMA |
312 | bool "NUMA support" | |
313 | depends on PPC64 | |
314 | default y if SMP && PPC_PSERIES | |
315 | ||
c80d79d7 YG |
316 | config NODES_SHIFT |
317 | int | |
318 | default "4" | |
319 | depends on NEED_MULTIPLE_NODES | |
320 | ||
14cf11af PM |
321 | config ARCH_SELECT_MEMORY_MODEL |
322 | def_bool y | |
323 | depends on PPC64 | |
324 | ||
325 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
326 | def_bool y |
327 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 328 | |
45fb6cea | 329 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 330 | def_bool y |
9100b205 | 331 | depends on PPC64 |
d29eff7b | 332 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 333 | |
45fb6cea | 334 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 335 | def_bool y |
78bde53e | 336 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 337 | |
c67c3cb4 | 338 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 339 | def_bool y |
c67c3cb4 MG |
340 | |
341 | source "mm/Kconfig" | |
14cf11af | 342 | |
7e9191da MK |
343 | config ARCH_MEMORY_PROBE |
344 | def_bool y | |
345 | depends on MEMORY_HOTPLUG | |
346 | ||
75167957 AW |
347 | # Some NUMA nodes have memory ranges that span |
348 | # other nodes. Even though a pfn is valid and | |
349 | # between a node's start and end pfns, it may not | |
350 | # reside on that node. See memmap_init_zone() | |
351 | # for details. | |
352 | config NODES_SPAN_OTHER_NODES | |
353 | def_bool y | |
354 | depends on NEED_MULTIPLE_NODES | |
355 | ||
16c2d476 BH |
356 | config PPC_HAS_HASH_64K |
357 | bool | |
358 | depends on PPC64 | |
359 | default n | |
360 | ||
3c726f8d BH |
361 | config PPC_64K_PAGES |
362 | bool "64k page size" | |
863c84b9 | 363 | depends on PPC64 |
16c2d476 | 364 | select PPC_HAS_HASH_64K |
3c726f8d BH |
365 | help |
366 | This option changes the kernel logical page size to 64k. On machines | |
98750261 KG |
367 | without processor support for 64k pages, the kernel will simulate |
368 | them by loading each individual 4k page on demand transparently, | |
369 | while on hardware with such support, it will be used to map | |
370 | normal application pages. | |
3c726f8d | 371 | |
fa28237c PM |
372 | config PPC_SUBPAGE_PROT |
373 | bool "Support setting protections for 4k subpages" | |
374 | depends on PPC_64K_PAGES | |
375 | help | |
376 | This option adds support for a system call to allow user programs | |
377 | to set access permissions (read/write, readonly, or no access) | |
378 | on the 4k subpages of each 64k page. | |
379 | ||
14cf11af PM |
380 | config SCHED_SMT |
381 | bool "SMT (Hyperthreading) scheduler support" | |
382 | depends on PPC64 && SMP | |
14cf11af PM |
383 | help |
384 | SMT scheduler support improves the CPU scheduler's decision making | |
385 | when dealing with POWER5 cpus at a cost of slightly increased | |
386 | overhead in some places. If unsure say N here. | |
387 | ||
388 | config PROC_DEVICETREE | |
5f296755 PM |
389 | bool "Support for device tree in /proc" |
390 | depends on PROC_FS | |
14cf11af PM |
391 | help |
392 | This option adds a device-tree directory under /proc which contains | |
393 | an image of the device tree that the kernel copies from Open | |
5f296755 | 394 | Firmware or other boot firmware. If unsure, say Y here. |
14cf11af | 395 | |
14cf11af PM |
396 | config CMDLINE_BOOL |
397 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
398 | |
399 | config CMDLINE | |
400 | string "Initial kernel command string" | |
401 | depends on CMDLINE_BOOL | |
402 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
403 | help | |
404 | On some platforms, there is currently no way for the boot loader to | |
405 | pass arguments to the kernel. For these platforms, you can supply | |
406 | some command-line options at build time by entering them here. In | |
407 | most cases you will need to specify the root device here. | |
408 | ||
409 | if !44x || BROKEN | |
b28f5081 JB |
410 | config ARCH_WANTS_FREEZER_CONTROL |
411 | def_bool y | |
412 | depends on ADB_PMU | |
413 | ||
14cf11af PM |
414 | source kernel/power/Kconfig |
415 | endif | |
416 | ||
417 | config SECCOMP | |
418 | bool "Enable seccomp to safely compute untrusted bytecode" | |
419 | depends on PROC_FS | |
420 | default y | |
421 | help | |
422 | This kernel feature is useful for number crunching applications | |
423 | that may need to compute untrusted bytecode during their | |
424 | execution. By using pipes or other transports made available to | |
425 | the process as file descriptors supporting the read/write | |
426 | syscalls, it's possible to isolate those applications in | |
427 | their own address space using seccomp. Once seccomp is | |
428 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
429 | and the task is only allowed to execute a few safe syscalls | |
430 | defined by each seccomp mode. | |
431 | ||
432 | If unsure, say Y. Only embedded should say N here. | |
433 | ||
270429ba SW |
434 | config WANT_DEVICE_TREE |
435 | bool | |
436 | default n | |
437 | ||
438 | config DEVICE_TREE | |
439 | string "Static device tree source file" | |
440 | depends on WANT_DEVICE_TREE | |
441 | help | |
442 | This specifies the device tree source (.dts) file to be | |
443 | compiled and included when building the bootwrapper. If a | |
444 | relative filename is given, then it will be relative to | |
445 | arch/powerpc/boot/dts. If you are not using the bootwrapper, | |
446 | or do not need to build a dts into the bootwrapper, this | |
447 | field is ignored. | |
448 | ||
449 | For example, this is required when building a cuImage target | |
450 | for an older U-Boot, which cannot pass a device tree itself. | |
451 | Such a kernel will not work with a newer U-Boot that tries to | |
452 | pass a device tree (unless you tell it not to). If your U-Boot | |
453 | does not mention a device tree in "help bootm", then use the | |
454 | cuImage target and specify a device tree here. Otherwise, use | |
455 | the uImage target and leave this field blank. | |
456 | ||
14cf11af PM |
457 | endmenu |
458 | ||
459 | config ISA_DMA_API | |
460 | bool | |
373a6da1 | 461 | default !PPC_ISERIES || PCI |
14cf11af PM |
462 | |
463 | menu "Bus options" | |
464 | ||
465 | config ISA | |
466 | bool "Support for ISA-bus hardware" | |
467 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 468 | select PPC_I8259 |
14cf11af PM |
469 | help |
470 | Find out whether you have ISA slots on your motherboard. ISA is the | |
471 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
472 | inside your box. If you have an Apple machine, say N here; if you | |
473 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
474 | you have an embedded board, consult your board documentation. | |
475 | ||
5ac6da66 CL |
476 | config ZONE_DMA |
477 | bool | |
478 | default y | |
479 | ||
14cf11af PM |
480 | config GENERIC_ISA_DMA |
481 | bool | |
482 | depends on PPC64 || POWER4 || 6xx && !CPM2 | |
483 | default y | |
484 | ||
25635c71 PM |
485 | config PPC_INDIRECT_PCI |
486 | bool | |
487 | depends on PCI | |
63dafe57 | 488 | default y if 40x || 44x |
25635c71 PM |
489 | default n |
490 | ||
14cf11af PM |
491 | config EISA |
492 | bool | |
493 | ||
494 | config SBUS | |
495 | bool | |
496 | ||
08264cbc KG |
497 | config FSL_SOC |
498 | bool | |
499 | ||
55c44991 RZ |
500 | config FSL_PCI |
501 | bool | |
502 | select PPC_INDIRECT_PCI | |
503 | ||
14cf11af PM |
504 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
505 | config MCA | |
506 | bool | |
507 | ||
508 | config PCI | |
53158620 | 509 | bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \ |
bed59275 | 510 | || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \ |
f9bdedb2 | 511 | || PPC_PS3 || 44x |
f21f49ea | 512 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ |
53158620 | 513 | && !PPC_85xx && !PPC_86xx |
f21f49ea | 514 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 515 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 516 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
517 | help |
518 | Find out whether your system includes a PCI bus. PCI is the name of | |
519 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
520 | your box. If you say Y here, the kernel will include drivers and | |
521 | infrastructure code to support PCI bus devices. | |
522 | ||
523 | config PCI_DOMAINS | |
36e23590 MW |
524 | def_bool PCI |
525 | ||
526 | config PCI_SYSCALL | |
527 | def_bool PCI | |
14cf11af | 528 | |
14cf11af PM |
529 | config PCI_QSPAN |
530 | bool "QSpan PCI" | |
531 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 532 | select PPC_I8259 |
14cf11af PM |
533 | help |
534 | Say Y here if you have a system based on a Motorola 8xx-series | |
535 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
536 | ||
537 | config PCI_8260 | |
538 | bool | |
539 | depends on PCI && 8260 | |
25635c71 | 540 | select PPC_INDIRECT_PCI |
14cf11af PM |
541 | default y |
542 | ||
543 | config 8260_PCI9 | |
4a3ecc62 | 544 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 545 | depends on PCI_8260 && !8272 |
14cf11af PM |
546 | default y |
547 | ||
548 | choice | |
4a3ecc62 | 549 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
550 | depends on 8260_PCI9 |
551 | ||
552 | config 8260_PCI9_IDMA1 | |
553 | bool "IDMA1" | |
554 | ||
555 | config 8260_PCI9_IDMA2 | |
556 | bool "IDMA2" | |
557 | ||
558 | config 8260_PCI9_IDMA3 | |
559 | bool "IDMA3" | |
560 | ||
561 | config 8260_PCI9_IDMA4 | |
562 | bool "IDMA4" | |
563 | ||
564 | endchoice | |
565 | ||
bb53bb3d JM |
566 | source "drivers/pci/pcie/Kconfig" |
567 | ||
14cf11af PM |
568 | source "drivers/pci/Kconfig" |
569 | ||
570 | source "drivers/pcmcia/Kconfig" | |
571 | ||
572 | source "drivers/pci/hotplug/Kconfig" | |
573 | ||
574 | endmenu | |
575 | ||
576 | menu "Advanced setup" | |
577 | depends on PPC32 | |
578 | ||
579 | config ADVANCED_OPTIONS | |
580 | bool "Prompt for advanced kernel configuration options" | |
581 | help | |
582 | This option will enable prompting for a variety of advanced kernel | |
583 | configuration options. These options can cause the kernel to not | |
584 | work if they are set incorrectly, but can be used to optimize certain | |
585 | aspects of kernel memory management. | |
586 | ||
587 | Unless you know what you are doing, say N here. | |
588 | ||
589 | comment "Default settings for advanced configuration options are used" | |
590 | depends on !ADVANCED_OPTIONS | |
591 | ||
592 | config HIGHMEM_START_BOOL | |
593 | bool "Set high memory pool address" | |
594 | depends on ADVANCED_OPTIONS && HIGHMEM | |
595 | help | |
596 | This option allows you to set the base address of the kernel virtual | |
597 | area used to map high memory pages. This can be useful in | |
598 | optimizing the layout of kernel virtual memory. | |
599 | ||
600 | Say N here unless you know what you are doing. | |
601 | ||
602 | config HIGHMEM_START | |
603 | hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL | |
604 | default "0xfe000000" | |
605 | ||
606 | config LOWMEM_SIZE_BOOL | |
607 | bool "Set maximum low memory" | |
608 | depends on ADVANCED_OPTIONS | |
609 | help | |
610 | This option allows you to set the maximum amount of memory which | |
611 | will be used as "low memory", that is, memory which the kernel can | |
612 | access directly, without having to set up a kernel virtual mapping. | |
613 | This can be useful in optimizing the layout of kernel virtual | |
614 | memory. | |
615 | ||
616 | Say N here unless you know what you are doing. | |
617 | ||
618 | config LOWMEM_SIZE | |
619 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
620 | default "0x30000000" | |
621 | ||
622 | config KERNEL_START_BOOL | |
623 | bool "Set custom kernel base address" | |
624 | depends on ADVANCED_OPTIONS | |
625 | help | |
626 | This option allows you to set the kernel virtual address at which | |
627 | the kernel will map low memory (the kernel image will be linked at | |
628 | this address). This can be useful in optimizing the virtual memory | |
629 | layout of the system. | |
630 | ||
631 | Say N here unless you know what you are doing. | |
632 | ||
633 | config KERNEL_START | |
634 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
635 | default "0xc0000000" | |
636 | ||
637 | config TASK_SIZE_BOOL | |
638 | bool "Set custom user task size" | |
639 | depends on ADVANCED_OPTIONS | |
640 | help | |
641 | This option allows you to set the amount of virtual address space | |
642 | allocated to user tasks. This can be useful in optimizing the | |
643 | virtual memory layout of the system. | |
644 | ||
645 | Say N here unless you know what you are doing. | |
646 | ||
647 | config TASK_SIZE | |
648 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
649 | default "0x80000000" if PPC_PREP || PPC_8xx |
650 | default "0xc0000000" | |
14cf11af PM |
651 | |
652 | config CONSISTENT_START_BOOL | |
653 | bool "Set custom consistent memory pool address" | |
654 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
655 | help | |
656 | This option allows you to set the base virtual address | |
4b3f686d | 657 | of the consistent memory pool. This pool of virtual |
14cf11af PM |
658 | memory is used to make consistent memory allocations. |
659 | ||
660 | config CONSISTENT_START | |
661 | hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL | |
ccf0d68e | 662 | default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx) |
14cf11af PM |
663 | default "0xff100000" if NOT_COHERENT_CACHE |
664 | ||
665 | config CONSISTENT_SIZE_BOOL | |
666 | bool "Set custom consistent memory pool size" | |
667 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
668 | help | |
4b3f686d | 669 | This option allows you to set the size of the |
14cf11af PM |
670 | consistent memory pool. This pool of virtual memory |
671 | is used to make consistent memory allocations. | |
672 | ||
673 | config CONSISTENT_SIZE | |
674 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
675 | default "0x00200000" if NOT_COHERENT_CACHE | |
676 | ||
677 | config BOOT_LOAD_BOOL | |
678 | bool "Set the boot link/load address" | |
679 | depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM | |
680 | help | |
681 | This option allows you to set the initial load address of the zImage | |
682 | or zImage.initrd file. This can be useful if you are on a board | |
683 | which has a small amount of memory. | |
684 | ||
685 | Say N here unless you know what you are doing. | |
686 | ||
687 | config BOOT_LOAD | |
688 | hex "Link/load address for booting" if BOOT_LOAD_BOOL | |
689 | default "0x00400000" if 40x || 8xx || 8260 | |
690 | default "0x01000000" if 44x | |
691 | default "0x00800000" | |
692 | ||
693 | config PIN_TLB | |
694 | bool "Pinned Kernel TLBs (860 ONLY)" | |
695 | depends on ADVANCED_OPTIONS && 8xx | |
696 | endmenu | |
697 | ||
cabb5587 SR |
698 | if PPC64 |
699 | config KERNEL_START | |
700 | hex | |
eeb2d218 | 701 | default "0xc000000000000000" |
cabb5587 SR |
702 | endif |
703 | ||
14cf11af PM |
704 | source "net/Kconfig" |
705 | ||
706 | source "drivers/Kconfig" | |
707 | ||
708 | source "fs/Kconfig" | |
709 | ||
710 | # XXX source "arch/ppc/8xx_io/Kconfig" | |
711 | ||
712 | # XXX source "arch/ppc/8260_io/Kconfig" | |
713 | ||
98658538 LY |
714 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
715 | ||
14cf11af PM |
716 | source "lib/Kconfig" |
717 | ||
14cf11af PM |
718 | source "arch/powerpc/Kconfig.debug" |
719 | ||
720 | source "security/Kconfig" | |
721 | ||
722 | config KEYS_COMPAT | |
723 | bool | |
724 | depends on COMPAT && KEYS | |
725 | default y | |
726 | ||
727 | source "crypto/Kconfig" | |
6f668280 DP |
728 | |
729 | config PPC_CLOCK | |
730 | bool | |
731 | default n | |
1088a209 SM |
732 | |
733 | config PPC_LIB_RHEAP | |
734 | bool | |
735 |