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> |
8d089085 | 36 | #include <linux/percpu.h> |
03501dab PM |
37 | #include <asm/io.h> |
38 | #include <asm/prom.h> | |
39 | #include <asm/processor.h> | |
a7f290da | 40 | #include <asm/vdso_datapage.h> |
03501dab | 41 | #include <asm/pgtable.h> |
03501dab PM |
42 | #include <asm/smp.h> |
43 | #include <asm/elf.h> | |
44 | #include <asm/machdep.h> | |
45 | #include <asm/time.h> | |
46 | #include <asm/cputable.h> | |
47 | #include <asm/sections.h> | |
e8222502 | 48 | #include <asm/firmware.h> |
03501dab PM |
49 | #include <asm/btext.h> |
50 | #include <asm/nvram.h> | |
51 | #include <asm/setup.h> | |
52 | #include <asm/system.h> | |
53 | #include <asm/rtas.h> | |
54 | #include <asm/iommu.h> | |
55 | #include <asm/serial.h> | |
56 | #include <asm/cache.h> | |
57 | #include <asm/page.h> | |
58 | #include <asm/mmu.h> | |
59 | #include <asm/lmb.h> | |
fca5dcd4 | 60 | #include <asm/xmon.h> |
8d089085 | 61 | #include <asm/cputhreads.h> |
03501dab | 62 | |
66ba135c SR |
63 | #include "setup.h" |
64 | ||
03501dab | 65 | #ifdef DEBUG |
f9e4ec57 | 66 | #include <asm/udbg.h> |
03501dab PM |
67 | #define DBG(fmt...) udbg_printf(fmt) |
68 | #else | |
69 | #define DBG(fmt...) | |
70 | #endif | |
71 | ||
e8222502 BH |
72 | /* The main machine-dep calls structure |
73 | */ | |
74 | struct machdep_calls ppc_md; | |
75 | EXPORT_SYMBOL(ppc_md); | |
76 | struct machdep_calls *machine_id; | |
77 | EXPORT_SYMBOL(machine_id); | |
799d6046 | 78 | |
49b09853 PM |
79 | unsigned long klimit = (unsigned long) _end; |
80 | ||
19a8d97d SR |
81 | char cmd_line[COMMAND_LINE_SIZE]; |
82 | ||
03501dab PM |
83 | /* |
84 | * This still seems to be needed... -- paulus | |
85 | */ | |
86 | struct screen_info screen_info = { | |
87 | .orig_x = 0, | |
88 | .orig_y = 25, | |
89 | .orig_video_cols = 80, | |
90 | .orig_video_lines = 25, | |
91 | .orig_video_isVGA = 1, | |
92 | .orig_video_points = 16 | |
93 | }; | |
94 | ||
95 | #ifdef __DO_IRQ_CANON | |
96 | /* XXX should go elsewhere eventually */ | |
97 | int ppc_do_canonicalize_irqs; | |
98 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
99 | #endif | |
100 | ||
101 | /* also used by kexec */ | |
102 | void machine_shutdown(void) | |
103 | { | |
3d1229d6 ME |
104 | if (ppc_md.machine_shutdown) |
105 | ppc_md.machine_shutdown(); | |
03501dab PM |
106 | } |
107 | ||
108 | void machine_restart(char *cmd) | |
109 | { | |
110 | machine_shutdown(); | |
b8e383d5 KG |
111 | if (ppc_md.restart) |
112 | ppc_md.restart(cmd); | |
03501dab PM |
113 | #ifdef CONFIG_SMP |
114 | smp_send_stop(); | |
115 | #endif | |
116 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
117 | local_irq_disable(); | |
118 | while (1) ; | |
119 | } | |
120 | ||
121 | void machine_power_off(void) | |
122 | { | |
123 | machine_shutdown(); | |
b8e383d5 KG |
124 | if (ppc_md.power_off) |
125 | ppc_md.power_off(); | |
03501dab PM |
126 | #ifdef CONFIG_SMP |
127 | smp_send_stop(); | |
128 | #endif | |
129 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
130 | local_irq_disable(); | |
131 | while (1) ; | |
132 | } | |
133 | /* Used by the G5 thermal driver */ | |
134 | EXPORT_SYMBOL_GPL(machine_power_off); | |
135 | ||
136 | void (*pm_power_off)(void) = machine_power_off; | |
137 | EXPORT_SYMBOL_GPL(pm_power_off); | |
138 | ||
139 | void machine_halt(void) | |
140 | { | |
141 | machine_shutdown(); | |
b8e383d5 KG |
142 | if (ppc_md.halt) |
143 | ppc_md.halt(); | |
03501dab PM |
144 | #ifdef CONFIG_SMP |
145 | smp_send_stop(); | |
146 | #endif | |
147 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
148 | local_irq_disable(); | |
149 | while (1) ; | |
150 | } | |
151 | ||
152 | ||
153 | #ifdef CONFIG_TAU | |
154 | extern u32 cpu_temp(unsigned long cpu); | |
155 | extern u32 cpu_temp_both(unsigned long cpu); | |
156 | #endif /* CONFIG_TAU */ | |
157 | ||
158 | #ifdef CONFIG_SMP | |
159 | DEFINE_PER_CPU(unsigned int, pvr); | |
160 | #endif | |
161 | ||
162 | static int show_cpuinfo(struct seq_file *m, void *v) | |
163 | { | |
164 | unsigned long cpu_id = (unsigned long)v - 1; | |
165 | unsigned int pvr; | |
166 | unsigned short maj; | |
167 | unsigned short min; | |
168 | ||
169 | if (cpu_id == NR_CPUS) { | |
170 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) | |
171 | unsigned long bogosum = 0; | |
172 | int i; | |
394e3902 AM |
173 | for_each_online_cpu(i) |
174 | bogosum += loops_per_jiffy; | |
03501dab PM |
175 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", |
176 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
177 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
178 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
e8222502 BH |
179 | if (ppc_md.name) |
180 | seq_printf(m, "platform\t: %s\n", ppc_md.name); | |
03501dab PM |
181 | if (ppc_md.show_cpuinfo != NULL) |
182 | ppc_md.show_cpuinfo(m); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | /* We only show online cpus: disable preempt (overzealous, I | |
188 | * knew) to prevent cpu going down. */ | |
189 | preempt_disable(); | |
190 | if (!cpu_online(cpu_id)) { | |
191 | preempt_enable(); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | #ifdef CONFIG_SMP | |
03501dab | 196 | pvr = per_cpu(pvr, cpu_id); |
03501dab PM |
197 | #else |
198 | pvr = mfspr(SPRN_PVR); | |
199 | #endif | |
200 | maj = (pvr >> 8) & 0xFF; | |
201 | min = pvr & 0xFF; | |
202 | ||
203 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
204 | seq_printf(m, "cpu\t\t: "); | |
205 | ||
206 | if (cur_cpu_spec->pvr_mask) | |
207 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
208 | else | |
209 | seq_printf(m, "unknown (%08x)", pvr); | |
210 | ||
211 | #ifdef CONFIG_ALTIVEC | |
212 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
213 | seq_printf(m, ", altivec supported"); | |
214 | #endif /* CONFIG_ALTIVEC */ | |
215 | ||
216 | seq_printf(m, "\n"); | |
217 | ||
218 | #ifdef CONFIG_TAU | |
219 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
220 | #ifdef CONFIG_TAU_AVERAGE | |
221 | /* more straightforward, but potentially misleading */ | |
222 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
bccfd588 | 223 | cpu_temp(cpu_id)); |
03501dab PM |
224 | #else |
225 | /* show the actual temp sensor range */ | |
226 | u32 temp; | |
bccfd588 | 227 | temp = cpu_temp_both(cpu_id); |
03501dab PM |
228 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
229 | temp & 0xff, temp >> 16); | |
230 | #endif | |
231 | } | |
232 | #endif /* CONFIG_TAU */ | |
233 | ||
234 | /* | |
235 | * Assume here that all clock rates are the same in a | |
236 | * smp system. -- Cort | |
237 | */ | |
238 | if (ppc_proc_freq) | |
239 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", | |
240 | ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); | |
241 | ||
242 | if (ppc_md.show_percpuinfo != NULL) | |
243 | ppc_md.show_percpuinfo(m, cpu_id); | |
244 | ||
245 | /* If we are a Freescale core do a simple check so | |
246 | * we dont have to keep adding cases in the future */ | |
247 | if (PVR_VER(pvr) & 0x8000) { | |
248 | maj = PVR_MAJ(pvr); | |
249 | min = PVR_MIN(pvr); | |
250 | } else { | |
251 | switch (PVR_VER(pvr)) { | |
252 | case 0x0020: /* 403 family */ | |
253 | maj = PVR_MAJ(pvr) + 1; | |
254 | min = PVR_MIN(pvr); | |
255 | break; | |
256 | case 0x1008: /* 740P/750P ?? */ | |
257 | maj = ((pvr >> 8) & 0xFF) - 1; | |
258 | min = pvr & 0xFF; | |
259 | break; | |
260 | default: | |
261 | maj = (pvr >> 8) & 0xFF; | |
262 | min = pvr & 0xFF; | |
263 | break; | |
264 | } | |
265 | } | |
266 | ||
267 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
268 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
269 | ||
270 | #ifdef CONFIG_PPC32 | |
271 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
272 | loops_per_jiffy / (500000/HZ), | |
273 | (loops_per_jiffy / (5000/HZ)) % 100); | |
274 | #endif | |
275 | ||
276 | #ifdef CONFIG_SMP | |
277 | seq_printf(m, "\n"); | |
278 | #endif | |
279 | ||
280 | preempt_enable(); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | static void *c_start(struct seq_file *m, loff_t *pos) | |
285 | { | |
286 | unsigned long i = *pos; | |
287 | ||
288 | return i <= NR_CPUS ? (void *)(i + 1) : NULL; | |
289 | } | |
290 | ||
291 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
292 | { | |
293 | ++*pos; | |
294 | return c_start(m, pos); | |
295 | } | |
296 | ||
297 | static void c_stop(struct seq_file *m, void *v) | |
298 | { | |
299 | } | |
300 | ||
301 | struct seq_operations cpuinfo_op = { | |
302 | .start =c_start, | |
303 | .next = c_next, | |
304 | .stop = c_stop, | |
305 | .show = show_cpuinfo, | |
306 | }; | |
307 | ||
a82765b6 DW |
308 | void __init check_for_initrd(void) |
309 | { | |
310 | #ifdef CONFIG_BLK_DEV_INITRD | |
30437b3e DG |
311 | DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", |
312 | initrd_start, initrd_end); | |
a82765b6 DW |
313 | |
314 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
315 | * look sensible. If not, clear initrd reference. | |
316 | */ | |
51fae6de | 317 | if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
a82765b6 DW |
318 | initrd_end > initrd_start) |
319 | ROOT_DEV = Root_RAM0; | |
6761c4a0 | 320 | else |
a82765b6 | 321 | initrd_start = initrd_end = 0; |
a82765b6 DW |
322 | |
323 | if (initrd_start) | |
324 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
325 | ||
326 | DBG(" <- check_for_initrd()\n"); | |
327 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
328 | } | |
329 | ||
5ad57078 PM |
330 | #ifdef CONFIG_SMP |
331 | ||
8d089085 BH |
332 | int threads_per_core, threads_shift; |
333 | cpumask_t threads_core_mask; | |
334 | ||
335 | static void __init cpu_init_thread_core_maps(int tpc) | |
336 | { | |
337 | int i; | |
338 | ||
339 | threads_per_core = tpc; | |
340 | threads_core_mask = CPU_MASK_NONE; | |
341 | ||
342 | /* This implementation only supports power of 2 number of threads | |
343 | * for simplicity and performance | |
344 | */ | |
345 | threads_shift = ilog2(tpc); | |
346 | BUG_ON(tpc != (1 << threads_shift)); | |
347 | ||
348 | for (i = 0; i < tpc; i++) | |
349 | cpu_set(i, threads_core_mask); | |
350 | ||
351 | printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", | |
352 | tpc, tpc > 1 ? "s" : ""); | |
353 | printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); | |
354 | } | |
355 | ||
356 | ||
5ad57078 PM |
357 | /** |
358 | * setup_cpu_maps - initialize the following cpu maps: | |
359 | * cpu_possible_map | |
360 | * cpu_present_map | |
361 | * cpu_sibling_map | |
362 | * | |
363 | * Having the possible map set up early allows us to restrict allocations | |
364 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
365 | * | |
366 | * We do not initialize the online map here; cpus set their own bits in | |
367 | * cpu_online_map as they come up. | |
368 | * | |
369 | * This function is valid only for Open Firmware systems. finish_device_tree | |
370 | * must be called before using this. | |
371 | * | |
372 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
4df20460 AB |
373 | * |
374 | * NOTE: This must match the parsing done in early_init_dt_scan_cpus. | |
5ad57078 PM |
375 | */ |
376 | void __init smp_setup_cpu_maps(void) | |
377 | { | |
378 | struct device_node *dn = NULL; | |
379 | int cpu = 0; | |
8d089085 BH |
380 | int nthreads = 1; |
381 | ||
382 | DBG("smp_setup_cpu_maps()\n"); | |
5ad57078 PM |
383 | |
384 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
a7f67bdf | 385 | const int *intserv; |
8d089085 BH |
386 | int j, len; |
387 | ||
388 | DBG(" * %s...\n", dn->full_name); | |
5ad57078 | 389 | |
e2eb6392 SR |
390 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", |
391 | &len); | |
8d089085 | 392 | if (intserv) { |
5ad57078 | 393 | nthreads = len / sizeof(int); |
8d089085 BH |
394 | DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", |
395 | nthreads); | |
396 | } else { | |
397 | DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); | |
e2eb6392 | 398 | intserv = of_get_property(dn, "reg", NULL); |
5ad57078 PM |
399 | if (!intserv) |
400 | intserv = &cpu; /* assume logical == phys */ | |
401 | } | |
402 | ||
403 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
8d089085 BH |
404 | DBG(" thread %d -> cpu %d (hard id %d)\n", |
405 | j, cpu, intserv[j]); | |
5ad57078 PM |
406 | cpu_set(cpu, cpu_present_map); |
407 | set_hard_smp_processor_id(cpu, intserv[j]); | |
5ad57078 PM |
408 | cpu_set(cpu, cpu_possible_map); |
409 | cpu++; | |
410 | } | |
411 | } | |
412 | ||
8d089085 BH |
413 | /* If no SMT supported, nthreads is forced to 1 */ |
414 | if (!cpu_has_feature(CPU_FTR_SMT)) { | |
415 | DBG(" SMT disabled ! nthreads forced to 1\n"); | |
416 | nthreads = 1; | |
417 | } | |
418 | ||
5ad57078 PM |
419 | #ifdef CONFIG_PPC64 |
420 | /* | |
421 | * On pSeries LPAR, we need to know how many cpus | |
422 | * could possibly be added to this partition. | |
423 | */ | |
e8222502 | 424 | if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && |
799d6046 | 425 | (dn = of_find_node_by_path("/rtas"))) { |
5ad57078 | 426 | int num_addr_cell, num_size_cell, maxcpus; |
a7f67bdf | 427 | const unsigned int *ireg; |
5ad57078 | 428 | |
a8bda5dd | 429 | num_addr_cell = of_n_addr_cells(dn); |
9213feea | 430 | num_size_cell = of_n_size_cells(dn); |
5ad57078 | 431 | |
e2eb6392 | 432 | ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); |
5ad57078 PM |
433 | |
434 | if (!ireg) | |
435 | goto out; | |
436 | ||
437 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
438 | ||
439 | /* Double maxcpus for processors which have SMT capability */ | |
440 | if (cpu_has_feature(CPU_FTR_SMT)) | |
8d089085 | 441 | maxcpus *= nthreads; |
5ad57078 PM |
442 | |
443 | if (maxcpus > NR_CPUS) { | |
444 | printk(KERN_WARNING | |
445 | "Partition configured for %d cpus, " | |
446 | "operating system maximum is %d.\n", | |
447 | maxcpus, NR_CPUS); | |
448 | maxcpus = NR_CPUS; | |
449 | } else | |
450 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
451 | maxcpus); | |
452 | ||
453 | for (cpu = 0; cpu < maxcpus; cpu++) | |
454 | cpu_set(cpu, cpu_possible_map); | |
455 | out: | |
456 | of_node_put(dn); | |
457 | } | |
d5a7430d MT |
458 | vdso_data->processorCount = num_present_cpus(); |
459 | #endif /* CONFIG_PPC64 */ | |
8d089085 BH |
460 | |
461 | /* Initialize CPU <=> thread mapping/ | |
462 | * | |
463 | * WARNING: We assume that the number of threads is the same for | |
464 | * every CPU in the system. If that is not the case, then some code | |
465 | * here will have to be reworked | |
466 | */ | |
467 | cpu_init_thread_core_maps(nthreads); | |
d5a7430d MT |
468 | } |
469 | ||
470 | /* | |
471 | * Being that cpu_sibling_map is now a per_cpu array, then it cannot | |
472 | * be initialized until the per_cpu areas have been created. This | |
473 | * function is now called from setup_per_cpu_areas(). | |
474 | */ | |
475 | void __init smp_setup_cpu_sibling_map(void) | |
476 | { | |
8d089085 BH |
477 | #ifdef CONFIG_PPC64 |
478 | int i, cpu, base; | |
d5a7430d | 479 | |
0e551954 | 480 | for_each_possible_cpu(cpu) { |
8d089085 BH |
481 | DBG("Sibling map for CPU %d:", cpu); |
482 | base = cpu_first_thread_in_core(cpu); | |
483 | for (i = 0; i < threads_per_core; i++) { | |
484 | cpu_set(base + i, per_cpu(cpu_sibling_map, cpu)); | |
485 | DBG(" %d", base + i); | |
486 | } | |
487 | DBG("\n"); | |
5ad57078 | 488 | } |
8d089085 | 489 | |
5ad57078 PM |
490 | #endif /* CONFIG_PPC64 */ |
491 | } | |
492 | #endif /* CONFIG_SMP */ | |
fca5dcd4 | 493 | |
e5c6c8e4 MN |
494 | static __init int add_pcspkr(void) |
495 | { | |
496 | struct device_node *np; | |
497 | struct platform_device *pd; | |
498 | int ret; | |
499 | ||
500 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); | |
501 | of_node_put(np); | |
502 | if (!np) | |
503 | return -ENODEV; | |
504 | ||
505 | pd = platform_device_alloc("pcspkr", -1); | |
506 | if (!pd) | |
507 | return -ENOMEM; | |
508 | ||
509 | ret = platform_device_add(pd); | |
510 | if (ret) | |
511 | platform_device_put(pd); | |
512 | ||
513 | return ret; | |
514 | } | |
515 | device_initcall(add_pcspkr); | |
95d465fd | 516 | |
e8222502 BH |
517 | void probe_machine(void) |
518 | { | |
519 | extern struct machdep_calls __machine_desc_start; | |
520 | extern struct machdep_calls __machine_desc_end; | |
521 | ||
522 | /* | |
523 | * Iterate all ppc_md structures until we find the proper | |
524 | * one for the current machine type | |
525 | */ | |
526 | DBG("Probing machine type ...\n"); | |
527 | ||
528 | for (machine_id = &__machine_desc_start; | |
529 | machine_id < &__machine_desc_end; | |
530 | machine_id++) { | |
531 | DBG(" %s ...", machine_id->name); | |
532 | memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); | |
533 | if (ppc_md.probe()) { | |
534 | DBG(" match !\n"); | |
535 | break; | |
536 | } | |
537 | DBG("\n"); | |
538 | } | |
539 | /* What can we do if we didn't find ? */ | |
540 | if (machine_id >= &__machine_desc_end) { | |
541 | DBG("No suitable machine found !\n"); | |
542 | for (;;); | |
543 | } | |
544 | ||
545 | printk(KERN_INFO "Using %s machine description\n", ppc_md.name); | |
546 | } | |
1269277a | 547 | |
8d8a0241 | 548 | /* Match a class of boards, not a specific device configuration. */ |
1269277a DW |
549 | int check_legacy_ioport(unsigned long base_port) |
550 | { | |
8d8a0241 OH |
551 | struct device_node *parent, *np = NULL; |
552 | int ret = -ENODEV; | |
553 | ||
554 | switch(base_port) { | |
555 | case I8042_DATA_REG: | |
db0dbae9 WF |
556 | if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) |
557 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); | |
558 | if (np) { | |
559 | parent = of_get_parent(np); | |
560 | of_node_put(np); | |
561 | np = parent; | |
562 | break; | |
563 | } | |
8d8a0241 | 564 | np = of_find_node_by_type(NULL, "8042"); |
f5d834fc AC |
565 | /* Pegasos has no device_type on its 8042 node, look for the |
566 | * name instead */ | |
567 | if (!np) | |
568 | np = of_find_node_by_name(NULL, "8042"); | |
8d8a0241 OH |
569 | break; |
570 | case FDC_BASE: /* FDC1 */ | |
571 | np = of_find_node_by_type(NULL, "fdc"); | |
572 | break; | |
573 | #ifdef CONFIG_PPC_PREP | |
574 | case _PIDXR: | |
575 | case _PNPWRP: | |
576 | case PNPBIOS_BASE: | |
577 | /* implement me */ | |
578 | #endif | |
579 | default: | |
580 | /* ipmi is supposed to fail here */ | |
581 | break; | |
582 | } | |
583 | if (!np) | |
584 | return ret; | |
585 | parent = of_get_parent(np); | |
586 | if (parent) { | |
587 | if (strcmp(parent->type, "isa") == 0) | |
588 | ret = 0; | |
589 | of_node_put(parent); | |
590 | } | |
591 | of_node_put(np); | |
592 | return ret; | |
1269277a DW |
593 | } |
594 | EXPORT_SYMBOL(check_legacy_ioport); | |
7e990266 KG |
595 | |
596 | static int ppc_panic_event(struct notifier_block *this, | |
597 | unsigned long event, void *ptr) | |
598 | { | |
599 | ppc_md.panic(ptr); /* May not return */ | |
600 | return NOTIFY_DONE; | |
601 | } | |
602 | ||
603 | static struct notifier_block ppc_panic_block = { | |
604 | .notifier_call = ppc_panic_event, | |
605 | .priority = INT_MIN /* may not return; must be done last */ | |
606 | }; | |
607 | ||
608 | void __init setup_panic(void) | |
609 | { | |
610 | atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); | |
611 | } | |
06cce43c DF |
612 | |
613 | #ifdef CONFIG_CHECK_CACHE_COHERENCY | |
614 | /* | |
615 | * For platforms that have configurable cache-coherency. This function | |
616 | * checks that the cache coherency setting of the kernel matches the setting | |
617 | * left by the firmware, as indicated in the device tree. Since a mismatch | |
618 | * will eventually result in DMA failures, we print * and error and call | |
619 | * BUG() in that case. | |
620 | */ | |
621 | ||
622 | #ifdef CONFIG_NOT_COHERENT_CACHE | |
623 | #define KERNEL_COHERENCY 0 | |
624 | #else | |
625 | #define KERNEL_COHERENCY 1 | |
626 | #endif | |
627 | ||
628 | static int __init check_cache_coherency(void) | |
629 | { | |
630 | struct device_node *np; | |
631 | const void *prop; | |
632 | int devtree_coherency; | |
633 | ||
634 | np = of_find_node_by_path("/"); | |
635 | prop = of_get_property(np, "coherency-off", NULL); | |
636 | of_node_put(np); | |
637 | ||
638 | devtree_coherency = prop ? 0 : 1; | |
639 | ||
640 | if (devtree_coherency != KERNEL_COHERENCY) { | |
641 | printk(KERN_ERR | |
642 | "kernel coherency:%s != device tree_coherency:%s\n", | |
643 | KERNEL_COHERENCY ? "on" : "off", | |
644 | devtree_coherency ? "on" : "off"); | |
645 | BUG(); | |
646 | } | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | late_initcall(check_cache_coherency); | |
652 | #endif /* CONFIG_CHECK_CACHE_COHERENCY */ | |
94a3807c ME |
653 | |
654 | #ifdef CONFIG_DEBUG_FS | |
655 | struct dentry *powerpc_debugfs_root; | |
656 | ||
657 | static int powerpc_debugfs_init(void) | |
658 | { | |
659 | powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); | |
660 | ||
661 | return powerpc_debugfs_root == NULL; | |
662 | } | |
663 | arch_initcall(powerpc_debugfs_init); | |
664 | #endif |