Commit | Line | Data |
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03501dab PM |
1 | /* |
2 | * Common boot and setup code for both 32-bit and 64-bit. | |
3 | * Extracted from arch/powerpc/kernel/setup_64.c. | |
4 | * | |
5 | * Copyright (C) 2001 PPC64 Team, IBM Corp | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
e8222502 BH |
12 | |
13 | #undef DEBUG | |
14 | ||
03501dab PM |
15 | #include <linux/module.h> |
16 | #include <linux/string.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/reboot.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/initrd.h> | |
e5c6c8e4 | 23 | #include <linux/platform_device.h> |
03501dab PM |
24 | #include <linux/seq_file.h> |
25 | #include <linux/ioport.h> | |
26 | #include <linux/console.h> | |
27 | #include <linux/utsname.h> | |
894673ee | 28 | #include <linux/screen_info.h> |
03501dab PM |
29 | #include <linux/root_dev.h> |
30 | #include <linux/notifier.h> | |
31 | #include <linux/cpu.h> | |
32 | #include <linux/unistd.h> | |
33 | #include <linux/serial.h> | |
34 | #include <linux/serial_8250.h> | |
94a3807c | 35 | #include <linux/debugfs.h> |
03501dab PM |
36 | #include <asm/io.h> |
37 | #include <asm/prom.h> | |
38 | #include <asm/processor.h> | |
a7f290da | 39 | #include <asm/vdso_datapage.h> |
03501dab | 40 | #include <asm/pgtable.h> |
03501dab PM |
41 | #include <asm/smp.h> |
42 | #include <asm/elf.h> | |
43 | #include <asm/machdep.h> | |
44 | #include <asm/time.h> | |
45 | #include <asm/cputable.h> | |
46 | #include <asm/sections.h> | |
e8222502 | 47 | #include <asm/firmware.h> |
03501dab PM |
48 | #include <asm/btext.h> |
49 | #include <asm/nvram.h> | |
50 | #include <asm/setup.h> | |
51 | #include <asm/system.h> | |
52 | #include <asm/rtas.h> | |
53 | #include <asm/iommu.h> | |
54 | #include <asm/serial.h> | |
55 | #include <asm/cache.h> | |
56 | #include <asm/page.h> | |
57 | #include <asm/mmu.h> | |
58 | #include <asm/lmb.h> | |
fca5dcd4 | 59 | #include <asm/xmon.h> |
03501dab | 60 | |
66ba135c SR |
61 | #include "setup.h" |
62 | ||
03501dab | 63 | #ifdef DEBUG |
f9e4ec57 | 64 | #include <asm/udbg.h> |
03501dab PM |
65 | #define DBG(fmt...) udbg_printf(fmt) |
66 | #else | |
67 | #define DBG(fmt...) | |
68 | #endif | |
69 | ||
e8222502 BH |
70 | /* The main machine-dep calls structure |
71 | */ | |
72 | struct machdep_calls ppc_md; | |
73 | EXPORT_SYMBOL(ppc_md); | |
74 | struct machdep_calls *machine_id; | |
75 | EXPORT_SYMBOL(machine_id); | |
799d6046 | 76 | |
49b09853 PM |
77 | unsigned long klimit = (unsigned long) _end; |
78 | ||
19a8d97d SR |
79 | char cmd_line[COMMAND_LINE_SIZE]; |
80 | ||
03501dab PM |
81 | /* |
82 | * This still seems to be needed... -- paulus | |
83 | */ | |
84 | struct screen_info screen_info = { | |
85 | .orig_x = 0, | |
86 | .orig_y = 25, | |
87 | .orig_video_cols = 80, | |
88 | .orig_video_lines = 25, | |
89 | .orig_video_isVGA = 1, | |
90 | .orig_video_points = 16 | |
91 | }; | |
92 | ||
93 | #ifdef __DO_IRQ_CANON | |
94 | /* XXX should go elsewhere eventually */ | |
95 | int ppc_do_canonicalize_irqs; | |
96 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
97 | #endif | |
98 | ||
99 | /* also used by kexec */ | |
100 | void machine_shutdown(void) | |
101 | { | |
3d1229d6 ME |
102 | if (ppc_md.machine_shutdown) |
103 | ppc_md.machine_shutdown(); | |
03501dab PM |
104 | } |
105 | ||
106 | void machine_restart(char *cmd) | |
107 | { | |
108 | machine_shutdown(); | |
b8e383d5 KG |
109 | if (ppc_md.restart) |
110 | ppc_md.restart(cmd); | |
03501dab PM |
111 | #ifdef CONFIG_SMP |
112 | smp_send_stop(); | |
113 | #endif | |
114 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
115 | local_irq_disable(); | |
116 | while (1) ; | |
117 | } | |
118 | ||
119 | void machine_power_off(void) | |
120 | { | |
121 | machine_shutdown(); | |
b8e383d5 KG |
122 | if (ppc_md.power_off) |
123 | ppc_md.power_off(); | |
03501dab PM |
124 | #ifdef CONFIG_SMP |
125 | smp_send_stop(); | |
126 | #endif | |
127 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
128 | local_irq_disable(); | |
129 | while (1) ; | |
130 | } | |
131 | /* Used by the G5 thermal driver */ | |
132 | EXPORT_SYMBOL_GPL(machine_power_off); | |
133 | ||
134 | void (*pm_power_off)(void) = machine_power_off; | |
135 | EXPORT_SYMBOL_GPL(pm_power_off); | |
136 | ||
137 | void machine_halt(void) | |
138 | { | |
139 | machine_shutdown(); | |
b8e383d5 KG |
140 | if (ppc_md.halt) |
141 | ppc_md.halt(); | |
03501dab PM |
142 | #ifdef CONFIG_SMP |
143 | smp_send_stop(); | |
144 | #endif | |
145 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
146 | local_irq_disable(); | |
147 | while (1) ; | |
148 | } | |
149 | ||
150 | ||
151 | #ifdef CONFIG_TAU | |
152 | extern u32 cpu_temp(unsigned long cpu); | |
153 | extern u32 cpu_temp_both(unsigned long cpu); | |
154 | #endif /* CONFIG_TAU */ | |
155 | ||
156 | #ifdef CONFIG_SMP | |
157 | DEFINE_PER_CPU(unsigned int, pvr); | |
158 | #endif | |
159 | ||
160 | static int show_cpuinfo(struct seq_file *m, void *v) | |
161 | { | |
162 | unsigned long cpu_id = (unsigned long)v - 1; | |
163 | unsigned int pvr; | |
164 | unsigned short maj; | |
165 | unsigned short min; | |
166 | ||
167 | if (cpu_id == NR_CPUS) { | |
168 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) | |
169 | unsigned long bogosum = 0; | |
170 | int i; | |
394e3902 AM |
171 | for_each_online_cpu(i) |
172 | bogosum += loops_per_jiffy; | |
03501dab PM |
173 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", |
174 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
175 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
176 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
e8222502 BH |
177 | if (ppc_md.name) |
178 | seq_printf(m, "platform\t: %s\n", ppc_md.name); | |
03501dab PM |
179 | if (ppc_md.show_cpuinfo != NULL) |
180 | ppc_md.show_cpuinfo(m); | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | /* We only show online cpus: disable preempt (overzealous, I | |
186 | * knew) to prevent cpu going down. */ | |
187 | preempt_disable(); | |
188 | if (!cpu_online(cpu_id)) { | |
189 | preempt_enable(); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | #ifdef CONFIG_SMP | |
03501dab | 194 | pvr = per_cpu(pvr, cpu_id); |
03501dab PM |
195 | #else |
196 | pvr = mfspr(SPRN_PVR); | |
197 | #endif | |
198 | maj = (pvr >> 8) & 0xFF; | |
199 | min = pvr & 0xFF; | |
200 | ||
201 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
202 | seq_printf(m, "cpu\t\t: "); | |
203 | ||
204 | if (cur_cpu_spec->pvr_mask) | |
205 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
206 | else | |
207 | seq_printf(m, "unknown (%08x)", pvr); | |
208 | ||
209 | #ifdef CONFIG_ALTIVEC | |
210 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
211 | seq_printf(m, ", altivec supported"); | |
212 | #endif /* CONFIG_ALTIVEC */ | |
213 | ||
214 | seq_printf(m, "\n"); | |
215 | ||
216 | #ifdef CONFIG_TAU | |
217 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
218 | #ifdef CONFIG_TAU_AVERAGE | |
219 | /* more straightforward, but potentially misleading */ | |
220 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
bccfd588 | 221 | cpu_temp(cpu_id)); |
03501dab PM |
222 | #else |
223 | /* show the actual temp sensor range */ | |
224 | u32 temp; | |
bccfd588 | 225 | temp = cpu_temp_both(cpu_id); |
03501dab PM |
226 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
227 | temp & 0xff, temp >> 16); | |
228 | #endif | |
229 | } | |
230 | #endif /* CONFIG_TAU */ | |
231 | ||
232 | /* | |
233 | * Assume here that all clock rates are the same in a | |
234 | * smp system. -- Cort | |
235 | */ | |
236 | if (ppc_proc_freq) | |
237 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", | |
238 | ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); | |
239 | ||
240 | if (ppc_md.show_percpuinfo != NULL) | |
241 | ppc_md.show_percpuinfo(m, cpu_id); | |
242 | ||
243 | /* If we are a Freescale core do a simple check so | |
244 | * we dont have to keep adding cases in the future */ | |
245 | if (PVR_VER(pvr) & 0x8000) { | |
246 | maj = PVR_MAJ(pvr); | |
247 | min = PVR_MIN(pvr); | |
248 | } else { | |
249 | switch (PVR_VER(pvr)) { | |
250 | case 0x0020: /* 403 family */ | |
251 | maj = PVR_MAJ(pvr) + 1; | |
252 | min = PVR_MIN(pvr); | |
253 | break; | |
254 | case 0x1008: /* 740P/750P ?? */ | |
255 | maj = ((pvr >> 8) & 0xFF) - 1; | |
256 | min = pvr & 0xFF; | |
257 | break; | |
258 | default: | |
259 | maj = (pvr >> 8) & 0xFF; | |
260 | min = pvr & 0xFF; | |
261 | break; | |
262 | } | |
263 | } | |
264 | ||
265 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
266 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
267 | ||
268 | #ifdef CONFIG_PPC32 | |
269 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
270 | loops_per_jiffy / (500000/HZ), | |
271 | (loops_per_jiffy / (5000/HZ)) % 100); | |
272 | #endif | |
273 | ||
274 | #ifdef CONFIG_SMP | |
275 | seq_printf(m, "\n"); | |
276 | #endif | |
277 | ||
278 | preempt_enable(); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static void *c_start(struct seq_file *m, loff_t *pos) | |
283 | { | |
284 | unsigned long i = *pos; | |
285 | ||
286 | return i <= NR_CPUS ? (void *)(i + 1) : NULL; | |
287 | } | |
288 | ||
289 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
290 | { | |
291 | ++*pos; | |
292 | return c_start(m, pos); | |
293 | } | |
294 | ||
295 | static void c_stop(struct seq_file *m, void *v) | |
296 | { | |
297 | } | |
298 | ||
299 | struct seq_operations cpuinfo_op = { | |
300 | .start =c_start, | |
301 | .next = c_next, | |
302 | .stop = c_stop, | |
303 | .show = show_cpuinfo, | |
304 | }; | |
305 | ||
a82765b6 DW |
306 | void __init check_for_initrd(void) |
307 | { | |
308 | #ifdef CONFIG_BLK_DEV_INITRD | |
30437b3e DG |
309 | DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", |
310 | initrd_start, initrd_end); | |
a82765b6 DW |
311 | |
312 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
313 | * look sensible. If not, clear initrd reference. | |
314 | */ | |
51fae6de | 315 | if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
a82765b6 DW |
316 | initrd_end > initrd_start) |
317 | ROOT_DEV = Root_RAM0; | |
6761c4a0 | 318 | else |
a82765b6 | 319 | initrd_start = initrd_end = 0; |
a82765b6 DW |
320 | |
321 | if (initrd_start) | |
322 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
323 | ||
324 | DBG(" <- check_for_initrd()\n"); | |
325 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
326 | } | |
327 | ||
5ad57078 PM |
328 | #ifdef CONFIG_SMP |
329 | ||
330 | /** | |
331 | * setup_cpu_maps - initialize the following cpu maps: | |
332 | * cpu_possible_map | |
333 | * cpu_present_map | |
334 | * cpu_sibling_map | |
335 | * | |
336 | * Having the possible map set up early allows us to restrict allocations | |
337 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
338 | * | |
339 | * We do not initialize the online map here; cpus set their own bits in | |
340 | * cpu_online_map as they come up. | |
341 | * | |
342 | * This function is valid only for Open Firmware systems. finish_device_tree | |
343 | * must be called before using this. | |
344 | * | |
345 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
4df20460 AB |
346 | * |
347 | * NOTE: This must match the parsing done in early_init_dt_scan_cpus. | |
5ad57078 PM |
348 | */ |
349 | void __init smp_setup_cpu_maps(void) | |
350 | { | |
351 | struct device_node *dn = NULL; | |
352 | int cpu = 0; | |
5ad57078 PM |
353 | |
354 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
a7f67bdf | 355 | const int *intserv; |
5ad57078 PM |
356 | int j, len = sizeof(u32), nthreads = 1; |
357 | ||
e2eb6392 SR |
358 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", |
359 | &len); | |
5ad57078 PM |
360 | if (intserv) |
361 | nthreads = len / sizeof(int); | |
362 | else { | |
e2eb6392 | 363 | intserv = of_get_property(dn, "reg", NULL); |
5ad57078 PM |
364 | if (!intserv) |
365 | intserv = &cpu; /* assume logical == phys */ | |
366 | } | |
367 | ||
368 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
369 | cpu_set(cpu, cpu_present_map); | |
370 | set_hard_smp_processor_id(cpu, intserv[j]); | |
5ad57078 PM |
371 | cpu_set(cpu, cpu_possible_map); |
372 | cpu++; | |
373 | } | |
374 | } | |
375 | ||
5ad57078 PM |
376 | #ifdef CONFIG_PPC64 |
377 | /* | |
378 | * On pSeries LPAR, we need to know how many cpus | |
379 | * could possibly be added to this partition. | |
380 | */ | |
e8222502 | 381 | if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && |
799d6046 | 382 | (dn = of_find_node_by_path("/rtas"))) { |
5ad57078 | 383 | int num_addr_cell, num_size_cell, maxcpus; |
a7f67bdf | 384 | const unsigned int *ireg; |
5ad57078 | 385 | |
a8bda5dd | 386 | num_addr_cell = of_n_addr_cells(dn); |
9213feea | 387 | num_size_cell = of_n_size_cells(dn); |
5ad57078 | 388 | |
e2eb6392 | 389 | ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); |
5ad57078 PM |
390 | |
391 | if (!ireg) | |
392 | goto out; | |
393 | ||
394 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
395 | ||
396 | /* Double maxcpus for processors which have SMT capability */ | |
397 | if (cpu_has_feature(CPU_FTR_SMT)) | |
398 | maxcpus *= 2; | |
399 | ||
400 | if (maxcpus > NR_CPUS) { | |
401 | printk(KERN_WARNING | |
402 | "Partition configured for %d cpus, " | |
403 | "operating system maximum is %d.\n", | |
404 | maxcpus, NR_CPUS); | |
405 | maxcpus = NR_CPUS; | |
406 | } else | |
407 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
408 | maxcpus); | |
409 | ||
410 | for (cpu = 0; cpu < maxcpus; cpu++) | |
411 | cpu_set(cpu, cpu_possible_map); | |
412 | out: | |
413 | of_node_put(dn); | |
414 | } | |
415 | ||
416 | /* | |
417 | * Do the sibling map; assume only two threads per processor. | |
418 | */ | |
0e551954 | 419 | for_each_possible_cpu(cpu) { |
5ad57078 PM |
420 | cpu_set(cpu, cpu_sibling_map[cpu]); |
421 | if (cpu_has_feature(CPU_FTR_SMT)) | |
422 | cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); | |
423 | } | |
424 | ||
a7f290da | 425 | vdso_data->processorCount = num_present_cpus(); |
5ad57078 PM |
426 | #endif /* CONFIG_PPC64 */ |
427 | } | |
428 | #endif /* CONFIG_SMP */ | |
fca5dcd4 | 429 | |
e5c6c8e4 MN |
430 | static __init int add_pcspkr(void) |
431 | { | |
432 | struct device_node *np; | |
433 | struct platform_device *pd; | |
434 | int ret; | |
435 | ||
436 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); | |
437 | of_node_put(np); | |
438 | if (!np) | |
439 | return -ENODEV; | |
440 | ||
441 | pd = platform_device_alloc("pcspkr", -1); | |
442 | if (!pd) | |
443 | return -ENOMEM; | |
444 | ||
445 | ret = platform_device_add(pd); | |
446 | if (ret) | |
447 | platform_device_put(pd); | |
448 | ||
449 | return ret; | |
450 | } | |
451 | device_initcall(add_pcspkr); | |
95d465fd | 452 | |
e8222502 BH |
453 | void probe_machine(void) |
454 | { | |
455 | extern struct machdep_calls __machine_desc_start; | |
456 | extern struct machdep_calls __machine_desc_end; | |
457 | ||
458 | /* | |
459 | * Iterate all ppc_md structures until we find the proper | |
460 | * one for the current machine type | |
461 | */ | |
462 | DBG("Probing machine type ...\n"); | |
463 | ||
464 | for (machine_id = &__machine_desc_start; | |
465 | machine_id < &__machine_desc_end; | |
466 | machine_id++) { | |
467 | DBG(" %s ...", machine_id->name); | |
468 | memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); | |
469 | if (ppc_md.probe()) { | |
470 | DBG(" match !\n"); | |
471 | break; | |
472 | } | |
473 | DBG("\n"); | |
474 | } | |
475 | /* What can we do if we didn't find ? */ | |
476 | if (machine_id >= &__machine_desc_end) { | |
477 | DBG("No suitable machine found !\n"); | |
478 | for (;;); | |
479 | } | |
480 | ||
481 | printk(KERN_INFO "Using %s machine description\n", ppc_md.name); | |
482 | } | |
1269277a | 483 | |
8d8a0241 | 484 | /* Match a class of boards, not a specific device configuration. */ |
1269277a DW |
485 | int check_legacy_ioport(unsigned long base_port) |
486 | { | |
8d8a0241 OH |
487 | struct device_node *parent, *np = NULL; |
488 | int ret = -ENODEV; | |
489 | ||
490 | switch(base_port) { | |
491 | case I8042_DATA_REG: | |
db0dbae9 WF |
492 | if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) |
493 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); | |
494 | if (np) { | |
495 | parent = of_get_parent(np); | |
496 | of_node_put(np); | |
497 | np = parent; | |
498 | break; | |
499 | } | |
8d8a0241 | 500 | np = of_find_node_by_type(NULL, "8042"); |
f5d834fc AC |
501 | /* Pegasos has no device_type on its 8042 node, look for the |
502 | * name instead */ | |
503 | if (!np) | |
504 | np = of_find_node_by_name(NULL, "8042"); | |
8d8a0241 OH |
505 | break; |
506 | case FDC_BASE: /* FDC1 */ | |
507 | np = of_find_node_by_type(NULL, "fdc"); | |
508 | break; | |
509 | #ifdef CONFIG_PPC_PREP | |
510 | case _PIDXR: | |
511 | case _PNPWRP: | |
512 | case PNPBIOS_BASE: | |
513 | /* implement me */ | |
514 | #endif | |
515 | default: | |
516 | /* ipmi is supposed to fail here */ | |
517 | break; | |
518 | } | |
519 | if (!np) | |
520 | return ret; | |
521 | parent = of_get_parent(np); | |
522 | if (parent) { | |
523 | if (strcmp(parent->type, "isa") == 0) | |
524 | ret = 0; | |
525 | of_node_put(parent); | |
526 | } | |
527 | of_node_put(np); | |
528 | return ret; | |
1269277a DW |
529 | } |
530 | EXPORT_SYMBOL(check_legacy_ioport); | |
7e990266 KG |
531 | |
532 | static int ppc_panic_event(struct notifier_block *this, | |
533 | unsigned long event, void *ptr) | |
534 | { | |
535 | ppc_md.panic(ptr); /* May not return */ | |
536 | return NOTIFY_DONE; | |
537 | } | |
538 | ||
539 | static struct notifier_block ppc_panic_block = { | |
540 | .notifier_call = ppc_panic_event, | |
541 | .priority = INT_MIN /* may not return; must be done last */ | |
542 | }; | |
543 | ||
544 | void __init setup_panic(void) | |
545 | { | |
546 | atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); | |
547 | } | |
06cce43c DF |
548 | |
549 | #ifdef CONFIG_CHECK_CACHE_COHERENCY | |
550 | /* | |
551 | * For platforms that have configurable cache-coherency. This function | |
552 | * checks that the cache coherency setting of the kernel matches the setting | |
553 | * left by the firmware, as indicated in the device tree. Since a mismatch | |
554 | * will eventually result in DMA failures, we print * and error and call | |
555 | * BUG() in that case. | |
556 | */ | |
557 | ||
558 | #ifdef CONFIG_NOT_COHERENT_CACHE | |
559 | #define KERNEL_COHERENCY 0 | |
560 | #else | |
561 | #define KERNEL_COHERENCY 1 | |
562 | #endif | |
563 | ||
564 | static int __init check_cache_coherency(void) | |
565 | { | |
566 | struct device_node *np; | |
567 | const void *prop; | |
568 | int devtree_coherency; | |
569 | ||
570 | np = of_find_node_by_path("/"); | |
571 | prop = of_get_property(np, "coherency-off", NULL); | |
572 | of_node_put(np); | |
573 | ||
574 | devtree_coherency = prop ? 0 : 1; | |
575 | ||
576 | if (devtree_coherency != KERNEL_COHERENCY) { | |
577 | printk(KERN_ERR | |
578 | "kernel coherency:%s != device tree_coherency:%s\n", | |
579 | KERNEL_COHERENCY ? "on" : "off", | |
580 | devtree_coherency ? "on" : "off"); | |
581 | BUG(); | |
582 | } | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | late_initcall(check_cache_coherency); | |
588 | #endif /* CONFIG_CHECK_CACHE_COHERENCY */ | |
94a3807c ME |
589 | |
590 | #ifdef CONFIG_DEBUG_FS | |
591 | struct dentry *powerpc_debugfs_root; | |
592 | ||
593 | static int powerpc_debugfs_init(void) | |
594 | { | |
595 | powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); | |
596 | ||
597 | return powerpc_debugfs_root == NULL; | |
598 | } | |
599 | arch_initcall(powerpc_debugfs_init); | |
600 | #endif |