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> |
d9b2b2a2 | 37 | #include <linux/lmb.h> |
d746286c | 38 | #include <linux/of_platform.h> |
03501dab PM |
39 | #include <asm/io.h> |
40 | #include <asm/prom.h> | |
41 | #include <asm/processor.h> | |
a7f290da | 42 | #include <asm/vdso_datapage.h> |
03501dab | 43 | #include <asm/pgtable.h> |
03501dab PM |
44 | #include <asm/smp.h> |
45 | #include <asm/elf.h> | |
46 | #include <asm/machdep.h> | |
47 | #include <asm/time.h> | |
48 | #include <asm/cputable.h> | |
49 | #include <asm/sections.h> | |
e8222502 | 50 | #include <asm/firmware.h> |
03501dab PM |
51 | #include <asm/btext.h> |
52 | #include <asm/nvram.h> | |
53 | #include <asm/setup.h> | |
54 | #include <asm/system.h> | |
55 | #include <asm/rtas.h> | |
56 | #include <asm/iommu.h> | |
57 | #include <asm/serial.h> | |
58 | #include <asm/cache.h> | |
59 | #include <asm/page.h> | |
60 | #include <asm/mmu.h> | |
fca5dcd4 | 61 | #include <asm/xmon.h> |
8d089085 | 62 | #include <asm/cputhreads.h> |
f465df81 | 63 | #include <mm/mmu_decl.h> |
03501dab | 64 | |
66ba135c SR |
65 | #include "setup.h" |
66 | ||
03501dab | 67 | #ifdef DEBUG |
f9e4ec57 | 68 | #include <asm/udbg.h> |
03501dab PM |
69 | #define DBG(fmt...) udbg_printf(fmt) |
70 | #else | |
71 | #define DBG(fmt...) | |
72 | #endif | |
73 | ||
e8222502 BH |
74 | /* The main machine-dep calls structure |
75 | */ | |
76 | struct machdep_calls ppc_md; | |
77 | EXPORT_SYMBOL(ppc_md); | |
78 | struct machdep_calls *machine_id; | |
79 | EXPORT_SYMBOL(machine_id); | |
799d6046 | 80 | |
49b09853 PM |
81 | unsigned long klimit = (unsigned long) _end; |
82 | ||
19a8d97d SR |
83 | char cmd_line[COMMAND_LINE_SIZE]; |
84 | ||
03501dab PM |
85 | /* |
86 | * This still seems to be needed... -- paulus | |
87 | */ | |
88 | struct screen_info screen_info = { | |
89 | .orig_x = 0, | |
90 | .orig_y = 25, | |
91 | .orig_video_cols = 80, | |
92 | .orig_video_lines = 25, | |
93 | .orig_video_isVGA = 1, | |
94 | .orig_video_points = 16 | |
95 | }; | |
96 | ||
97 | #ifdef __DO_IRQ_CANON | |
98 | /* XXX should go elsewhere eventually */ | |
99 | int ppc_do_canonicalize_irqs; | |
100 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
101 | #endif | |
102 | ||
103 | /* also used by kexec */ | |
104 | void machine_shutdown(void) | |
105 | { | |
3d1229d6 ME |
106 | if (ppc_md.machine_shutdown) |
107 | ppc_md.machine_shutdown(); | |
03501dab PM |
108 | } |
109 | ||
110 | void machine_restart(char *cmd) | |
111 | { | |
112 | machine_shutdown(); | |
b8e383d5 KG |
113 | if (ppc_md.restart) |
114 | ppc_md.restart(cmd); | |
03501dab PM |
115 | #ifdef CONFIG_SMP |
116 | smp_send_stop(); | |
117 | #endif | |
118 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
119 | local_irq_disable(); | |
120 | while (1) ; | |
121 | } | |
122 | ||
123 | void machine_power_off(void) | |
124 | { | |
125 | machine_shutdown(); | |
b8e383d5 KG |
126 | if (ppc_md.power_off) |
127 | ppc_md.power_off(); | |
03501dab PM |
128 | #ifdef CONFIG_SMP |
129 | smp_send_stop(); | |
130 | #endif | |
131 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
132 | local_irq_disable(); | |
133 | while (1) ; | |
134 | } | |
135 | /* Used by the G5 thermal driver */ | |
136 | EXPORT_SYMBOL_GPL(machine_power_off); | |
137 | ||
138 | void (*pm_power_off)(void) = machine_power_off; | |
139 | EXPORT_SYMBOL_GPL(pm_power_off); | |
140 | ||
141 | void machine_halt(void) | |
142 | { | |
143 | machine_shutdown(); | |
b8e383d5 KG |
144 | if (ppc_md.halt) |
145 | ppc_md.halt(); | |
03501dab PM |
146 | #ifdef CONFIG_SMP |
147 | smp_send_stop(); | |
148 | #endif | |
149 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
150 | local_irq_disable(); | |
151 | while (1) ; | |
152 | } | |
153 | ||
154 | ||
155 | #ifdef CONFIG_TAU | |
156 | extern u32 cpu_temp(unsigned long cpu); | |
157 | extern u32 cpu_temp_both(unsigned long cpu); | |
158 | #endif /* CONFIG_TAU */ | |
159 | ||
160 | #ifdef CONFIG_SMP | |
161 | DEFINE_PER_CPU(unsigned int, pvr); | |
162 | #endif | |
163 | ||
164 | static int show_cpuinfo(struct seq_file *m, void *v) | |
165 | { | |
166 | unsigned long cpu_id = (unsigned long)v - 1; | |
167 | unsigned int pvr; | |
168 | unsigned short maj; | |
169 | unsigned short min; | |
170 | ||
171 | if (cpu_id == NR_CPUS) { | |
0276c136 MB |
172 | struct device_node *root; |
173 | const char *model = NULL; | |
03501dab PM |
174 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) |
175 | unsigned long bogosum = 0; | |
176 | int i; | |
394e3902 AM |
177 | for_each_online_cpu(i) |
178 | bogosum += loops_per_jiffy; | |
03501dab PM |
179 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", |
180 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
181 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
182 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
e8222502 BH |
183 | if (ppc_md.name) |
184 | seq_printf(m, "platform\t: %s\n", ppc_md.name); | |
0276c136 MB |
185 | root = of_find_node_by_path("/"); |
186 | if (root) | |
187 | model = of_get_property(root, "model", NULL); | |
188 | if (model) | |
189 | seq_printf(m, "model\t\t: %s\n", model); | |
190 | of_node_put(root); | |
191 | ||
03501dab PM |
192 | if (ppc_md.show_cpuinfo != NULL) |
193 | ppc_md.show_cpuinfo(m); | |
194 | ||
f465df81 BB |
195 | #ifdef CONFIG_PPC32 |
196 | /* Display the amount of memory */ | |
197 | seq_printf(m, "Memory\t\t: %d MB\n", | |
198 | (unsigned int)(total_memory / (1024 * 1024))); | |
199 | #endif | |
200 | ||
03501dab PM |
201 | return 0; |
202 | } | |
203 | ||
204 | /* We only show online cpus: disable preempt (overzealous, I | |
205 | * knew) to prevent cpu going down. */ | |
206 | preempt_disable(); | |
207 | if (!cpu_online(cpu_id)) { | |
208 | preempt_enable(); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | #ifdef CONFIG_SMP | |
03501dab | 213 | pvr = per_cpu(pvr, cpu_id); |
03501dab PM |
214 | #else |
215 | pvr = mfspr(SPRN_PVR); | |
216 | #endif | |
217 | maj = (pvr >> 8) & 0xFF; | |
218 | min = pvr & 0xFF; | |
219 | ||
220 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
221 | seq_printf(m, "cpu\t\t: "); | |
222 | ||
223 | if (cur_cpu_spec->pvr_mask) | |
224 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
225 | else | |
226 | seq_printf(m, "unknown (%08x)", pvr); | |
227 | ||
228 | #ifdef CONFIG_ALTIVEC | |
229 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
230 | seq_printf(m, ", altivec supported"); | |
231 | #endif /* CONFIG_ALTIVEC */ | |
232 | ||
233 | seq_printf(m, "\n"); | |
234 | ||
235 | #ifdef CONFIG_TAU | |
236 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
237 | #ifdef CONFIG_TAU_AVERAGE | |
238 | /* more straightforward, but potentially misleading */ | |
239 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
bccfd588 | 240 | cpu_temp(cpu_id)); |
03501dab PM |
241 | #else |
242 | /* show the actual temp sensor range */ | |
243 | u32 temp; | |
bccfd588 | 244 | temp = cpu_temp_both(cpu_id); |
03501dab PM |
245 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
246 | temp & 0xff, temp >> 16); | |
247 | #endif | |
248 | } | |
249 | #endif /* CONFIG_TAU */ | |
250 | ||
251 | /* | |
252 | * Assume here that all clock rates are the same in a | |
253 | * smp system. -- Cort | |
254 | */ | |
255 | if (ppc_proc_freq) | |
256 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", | |
257 | ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); | |
258 | ||
259 | if (ppc_md.show_percpuinfo != NULL) | |
260 | ppc_md.show_percpuinfo(m, cpu_id); | |
261 | ||
262 | /* If we are a Freescale core do a simple check so | |
263 | * we dont have to keep adding cases in the future */ | |
264 | if (PVR_VER(pvr) & 0x8000) { | |
a501d8f3 ML |
265 | switch (PVR_VER(pvr)) { |
266 | case 0x8000: /* 7441/7450/7451, Voyager */ | |
267 | case 0x8001: /* 7445/7455, Apollo 6 */ | |
268 | case 0x8002: /* 7447/7457, Apollo 7 */ | |
269 | case 0x8003: /* 7447A, Apollo 7 PM */ | |
270 | case 0x8004: /* 7448, Apollo 8 */ | |
271 | case 0x800c: /* 7410, Nitro */ | |
272 | maj = ((pvr >> 8) & 0xF); | |
273 | min = PVR_MIN(pvr); | |
274 | break; | |
275 | default: /* e500/book-e */ | |
276 | maj = PVR_MAJ(pvr); | |
277 | min = PVR_MIN(pvr); | |
278 | break; | |
279 | } | |
03501dab PM |
280 | } else { |
281 | switch (PVR_VER(pvr)) { | |
282 | case 0x0020: /* 403 family */ | |
283 | maj = PVR_MAJ(pvr) + 1; | |
284 | min = PVR_MIN(pvr); | |
285 | break; | |
286 | case 0x1008: /* 740P/750P ?? */ | |
287 | maj = ((pvr >> 8) & 0xFF) - 1; | |
288 | min = pvr & 0xFF; | |
289 | break; | |
290 | default: | |
291 | maj = (pvr >> 8) & 0xFF; | |
292 | min = pvr & 0xFF; | |
293 | break; | |
294 | } | |
295 | } | |
296 | ||
297 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
298 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
299 | ||
300 | #ifdef CONFIG_PPC32 | |
301 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
302 | loops_per_jiffy / (500000/HZ), | |
303 | (loops_per_jiffy / (5000/HZ)) % 100); | |
304 | #endif | |
305 | ||
306 | #ifdef CONFIG_SMP | |
307 | seq_printf(m, "\n"); | |
308 | #endif | |
309 | ||
310 | preempt_enable(); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static void *c_start(struct seq_file *m, loff_t *pos) | |
315 | { | |
316 | unsigned long i = *pos; | |
317 | ||
318 | return i <= NR_CPUS ? (void *)(i + 1) : NULL; | |
319 | } | |
320 | ||
321 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
322 | { | |
323 | ++*pos; | |
324 | return c_start(m, pos); | |
325 | } | |
326 | ||
327 | static void c_stop(struct seq_file *m, void *v) | |
328 | { | |
329 | } | |
330 | ||
331 | struct seq_operations cpuinfo_op = { | |
332 | .start =c_start, | |
333 | .next = c_next, | |
334 | .stop = c_stop, | |
335 | .show = show_cpuinfo, | |
336 | }; | |
337 | ||
a82765b6 DW |
338 | void __init check_for_initrd(void) |
339 | { | |
340 | #ifdef CONFIG_BLK_DEV_INITRD | |
30437b3e DG |
341 | DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", |
342 | initrd_start, initrd_end); | |
a82765b6 DW |
343 | |
344 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
345 | * look sensible. If not, clear initrd reference. | |
346 | */ | |
51fae6de | 347 | if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
a82765b6 DW |
348 | initrd_end > initrd_start) |
349 | ROOT_DEV = Root_RAM0; | |
6761c4a0 | 350 | else |
a82765b6 | 351 | initrd_start = initrd_end = 0; |
a82765b6 DW |
352 | |
353 | if (initrd_start) | |
354 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
355 | ||
356 | DBG(" <- check_for_initrd()\n"); | |
357 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
358 | } | |
359 | ||
5ad57078 PM |
360 | #ifdef CONFIG_SMP |
361 | ||
8d089085 BH |
362 | int threads_per_core, threads_shift; |
363 | cpumask_t threads_core_mask; | |
364 | ||
365 | static void __init cpu_init_thread_core_maps(int tpc) | |
366 | { | |
367 | int i; | |
368 | ||
369 | threads_per_core = tpc; | |
370 | threads_core_mask = CPU_MASK_NONE; | |
371 | ||
372 | /* This implementation only supports power of 2 number of threads | |
373 | * for simplicity and performance | |
374 | */ | |
375 | threads_shift = ilog2(tpc); | |
376 | BUG_ON(tpc != (1 << threads_shift)); | |
377 | ||
378 | for (i = 0; i < tpc; i++) | |
379 | cpu_set(i, threads_core_mask); | |
380 | ||
381 | printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", | |
382 | tpc, tpc > 1 ? "s" : ""); | |
383 | printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); | |
384 | } | |
385 | ||
386 | ||
5ad57078 PM |
387 | /** |
388 | * setup_cpu_maps - initialize the following cpu maps: | |
389 | * cpu_possible_map | |
390 | * cpu_present_map | |
5ad57078 PM |
391 | * |
392 | * Having the possible map set up early allows us to restrict allocations | |
393 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
394 | * | |
395 | * We do not initialize the online map here; cpus set their own bits in | |
396 | * cpu_online_map as they come up. | |
397 | * | |
398 | * This function is valid only for Open Firmware systems. finish_device_tree | |
399 | * must be called before using this. | |
400 | * | |
401 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
4df20460 AB |
402 | * |
403 | * NOTE: This must match the parsing done in early_init_dt_scan_cpus. | |
5ad57078 PM |
404 | */ |
405 | void __init smp_setup_cpu_maps(void) | |
406 | { | |
407 | struct device_node *dn = NULL; | |
408 | int cpu = 0; | |
8d089085 BH |
409 | int nthreads = 1; |
410 | ||
411 | DBG("smp_setup_cpu_maps()\n"); | |
5ad57078 PM |
412 | |
413 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
a7f67bdf | 414 | const int *intserv; |
8d089085 BH |
415 | int j, len; |
416 | ||
417 | DBG(" * %s...\n", dn->full_name); | |
5ad57078 | 418 | |
e2eb6392 SR |
419 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", |
420 | &len); | |
8d089085 | 421 | if (intserv) { |
5ad57078 | 422 | nthreads = len / sizeof(int); |
8d089085 BH |
423 | DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", |
424 | nthreads); | |
425 | } else { | |
426 | DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); | |
e2eb6392 | 427 | intserv = of_get_property(dn, "reg", NULL); |
5ad57078 PM |
428 | if (!intserv) |
429 | intserv = &cpu; /* assume logical == phys */ | |
430 | } | |
431 | ||
432 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
8d089085 BH |
433 | DBG(" thread %d -> cpu %d (hard id %d)\n", |
434 | j, cpu, intserv[j]); | |
5ad57078 PM |
435 | cpu_set(cpu, cpu_present_map); |
436 | set_hard_smp_processor_id(cpu, intserv[j]); | |
5ad57078 PM |
437 | cpu_set(cpu, cpu_possible_map); |
438 | cpu++; | |
439 | } | |
440 | } | |
441 | ||
8d089085 BH |
442 | /* If no SMT supported, nthreads is forced to 1 */ |
443 | if (!cpu_has_feature(CPU_FTR_SMT)) { | |
444 | DBG(" SMT disabled ! nthreads forced to 1\n"); | |
445 | nthreads = 1; | |
446 | } | |
447 | ||
5ad57078 PM |
448 | #ifdef CONFIG_PPC64 |
449 | /* | |
450 | * On pSeries LPAR, we need to know how many cpus | |
451 | * could possibly be added to this partition. | |
452 | */ | |
e8222502 | 453 | if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && |
799d6046 | 454 | (dn = of_find_node_by_path("/rtas"))) { |
5ad57078 | 455 | int num_addr_cell, num_size_cell, maxcpus; |
a7f67bdf | 456 | const unsigned int *ireg; |
5ad57078 | 457 | |
a8bda5dd | 458 | num_addr_cell = of_n_addr_cells(dn); |
9213feea | 459 | num_size_cell = of_n_size_cells(dn); |
5ad57078 | 460 | |
e2eb6392 | 461 | ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); |
5ad57078 PM |
462 | |
463 | if (!ireg) | |
464 | goto out; | |
465 | ||
466 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
467 | ||
468 | /* Double maxcpus for processors which have SMT capability */ | |
469 | if (cpu_has_feature(CPU_FTR_SMT)) | |
8d089085 | 470 | maxcpus *= nthreads; |
5ad57078 PM |
471 | |
472 | if (maxcpus > NR_CPUS) { | |
473 | printk(KERN_WARNING | |
474 | "Partition configured for %d cpus, " | |
475 | "operating system maximum is %d.\n", | |
476 | maxcpus, NR_CPUS); | |
477 | maxcpus = NR_CPUS; | |
478 | } else | |
479 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
480 | maxcpus); | |
481 | ||
482 | for (cpu = 0; cpu < maxcpus; cpu++) | |
483 | cpu_set(cpu, cpu_possible_map); | |
484 | out: | |
485 | of_node_put(dn); | |
486 | } | |
d5a7430d MT |
487 | vdso_data->processorCount = num_present_cpus(); |
488 | #endif /* CONFIG_PPC64 */ | |
8d089085 BH |
489 | |
490 | /* Initialize CPU <=> thread mapping/ | |
491 | * | |
492 | * WARNING: We assume that the number of threads is the same for | |
493 | * every CPU in the system. If that is not the case, then some code | |
494 | * here will have to be reworked | |
495 | */ | |
496 | cpu_init_thread_core_maps(nthreads); | |
d5a7430d | 497 | } |
5ad57078 | 498 | #endif /* CONFIG_SMP */ |
fca5dcd4 | 499 | |
d33b78df | 500 | #ifdef CONFIG_PCSPKR_PLATFORM |
e5c6c8e4 MN |
501 | static __init int add_pcspkr(void) |
502 | { | |
503 | struct device_node *np; | |
504 | struct platform_device *pd; | |
505 | int ret; | |
506 | ||
507 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); | |
508 | of_node_put(np); | |
509 | if (!np) | |
510 | return -ENODEV; | |
511 | ||
512 | pd = platform_device_alloc("pcspkr", -1); | |
513 | if (!pd) | |
514 | return -ENOMEM; | |
515 | ||
516 | ret = platform_device_add(pd); | |
517 | if (ret) | |
518 | platform_device_put(pd); | |
519 | ||
520 | return ret; | |
521 | } | |
522 | device_initcall(add_pcspkr); | |
d33b78df | 523 | #endif /* CONFIG_PCSPKR_PLATFORM */ |
95d465fd | 524 | |
e8222502 BH |
525 | void probe_machine(void) |
526 | { | |
527 | extern struct machdep_calls __machine_desc_start; | |
528 | extern struct machdep_calls __machine_desc_end; | |
529 | ||
530 | /* | |
531 | * Iterate all ppc_md structures until we find the proper | |
532 | * one for the current machine type | |
533 | */ | |
534 | DBG("Probing machine type ...\n"); | |
535 | ||
536 | for (machine_id = &__machine_desc_start; | |
537 | machine_id < &__machine_desc_end; | |
538 | machine_id++) { | |
539 | DBG(" %s ...", machine_id->name); | |
540 | memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); | |
541 | if (ppc_md.probe()) { | |
542 | DBG(" match !\n"); | |
543 | break; | |
544 | } | |
545 | DBG("\n"); | |
546 | } | |
547 | /* What can we do if we didn't find ? */ | |
548 | if (machine_id >= &__machine_desc_end) { | |
549 | DBG("No suitable machine found !\n"); | |
550 | for (;;); | |
551 | } | |
552 | ||
553 | printk(KERN_INFO "Using %s machine description\n", ppc_md.name); | |
554 | } | |
1269277a | 555 | |
8d8a0241 | 556 | /* Match a class of boards, not a specific device configuration. */ |
1269277a DW |
557 | int check_legacy_ioport(unsigned long base_port) |
558 | { | |
8d8a0241 OH |
559 | struct device_node *parent, *np = NULL; |
560 | int ret = -ENODEV; | |
561 | ||
562 | switch(base_port) { | |
563 | case I8042_DATA_REG: | |
db0dbae9 WF |
564 | if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) |
565 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); | |
566 | if (np) { | |
567 | parent = of_get_parent(np); | |
568 | of_node_put(np); | |
569 | np = parent; | |
570 | break; | |
571 | } | |
8d8a0241 | 572 | np = of_find_node_by_type(NULL, "8042"); |
f5d834fc AC |
573 | /* Pegasos has no device_type on its 8042 node, look for the |
574 | * name instead */ | |
575 | if (!np) | |
576 | np = of_find_node_by_name(NULL, "8042"); | |
8d8a0241 OH |
577 | break; |
578 | case FDC_BASE: /* FDC1 */ | |
579 | np = of_find_node_by_type(NULL, "fdc"); | |
580 | break; | |
581 | #ifdef CONFIG_PPC_PREP | |
582 | case _PIDXR: | |
583 | case _PNPWRP: | |
584 | case PNPBIOS_BASE: | |
585 | /* implement me */ | |
586 | #endif | |
587 | default: | |
588 | /* ipmi is supposed to fail here */ | |
589 | break; | |
590 | } | |
591 | if (!np) | |
592 | return ret; | |
593 | parent = of_get_parent(np); | |
594 | if (parent) { | |
595 | if (strcmp(parent->type, "isa") == 0) | |
596 | ret = 0; | |
597 | of_node_put(parent); | |
598 | } | |
599 | of_node_put(np); | |
600 | return ret; | |
1269277a DW |
601 | } |
602 | EXPORT_SYMBOL(check_legacy_ioport); | |
7e990266 KG |
603 | |
604 | static int ppc_panic_event(struct notifier_block *this, | |
605 | unsigned long event, void *ptr) | |
606 | { | |
607 | ppc_md.panic(ptr); /* May not return */ | |
608 | return NOTIFY_DONE; | |
609 | } | |
610 | ||
611 | static struct notifier_block ppc_panic_block = { | |
612 | .notifier_call = ppc_panic_event, | |
613 | .priority = INT_MIN /* may not return; must be done last */ | |
614 | }; | |
615 | ||
616 | void __init setup_panic(void) | |
617 | { | |
618 | atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); | |
619 | } | |
06cce43c DF |
620 | |
621 | #ifdef CONFIG_CHECK_CACHE_COHERENCY | |
622 | /* | |
623 | * For platforms that have configurable cache-coherency. This function | |
624 | * checks that the cache coherency setting of the kernel matches the setting | |
625 | * left by the firmware, as indicated in the device tree. Since a mismatch | |
626 | * will eventually result in DMA failures, we print * and error and call | |
627 | * BUG() in that case. | |
628 | */ | |
629 | ||
630 | #ifdef CONFIG_NOT_COHERENT_CACHE | |
631 | #define KERNEL_COHERENCY 0 | |
632 | #else | |
633 | #define KERNEL_COHERENCY 1 | |
634 | #endif | |
635 | ||
636 | static int __init check_cache_coherency(void) | |
637 | { | |
638 | struct device_node *np; | |
639 | const void *prop; | |
640 | int devtree_coherency; | |
641 | ||
642 | np = of_find_node_by_path("/"); | |
643 | prop = of_get_property(np, "coherency-off", NULL); | |
644 | of_node_put(np); | |
645 | ||
646 | devtree_coherency = prop ? 0 : 1; | |
647 | ||
648 | if (devtree_coherency != KERNEL_COHERENCY) { | |
649 | printk(KERN_ERR | |
650 | "kernel coherency:%s != device tree_coherency:%s\n", | |
651 | KERNEL_COHERENCY ? "on" : "off", | |
652 | devtree_coherency ? "on" : "off"); | |
653 | BUG(); | |
654 | } | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | late_initcall(check_cache_coherency); | |
660 | #endif /* CONFIG_CHECK_CACHE_COHERENCY */ | |
94a3807c ME |
661 | |
662 | #ifdef CONFIG_DEBUG_FS | |
663 | struct dentry *powerpc_debugfs_root; | |
664 | ||
665 | static int powerpc_debugfs_init(void) | |
666 | { | |
667 | powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); | |
668 | ||
669 | return powerpc_debugfs_root == NULL; | |
670 | } | |
671 | arch_initcall(powerpc_debugfs_init); | |
672 | #endif | |
d746286c KG |
673 | |
674 | static int ppc_dflt_bus_notify(struct notifier_block *nb, | |
675 | unsigned long action, void *data) | |
676 | { | |
677 | struct device *dev = data; | |
678 | ||
679 | /* We are only intereted in device addition */ | |
680 | if (action != BUS_NOTIFY_ADD_DEVICE) | |
681 | return 0; | |
682 | ||
683 | set_dma_ops(dev, &dma_direct_ops); | |
684 | ||
685 | return NOTIFY_DONE; | |
686 | } | |
687 | ||
688 | static struct notifier_block ppc_dflt_plat_bus_notifier = { | |
689 | .notifier_call = ppc_dflt_bus_notify, | |
690 | .priority = INT_MAX, | |
691 | }; | |
692 | ||
693 | static struct notifier_block ppc_dflt_of_bus_notifier = { | |
694 | .notifier_call = ppc_dflt_bus_notify, | |
695 | .priority = INT_MAX, | |
696 | }; | |
697 | ||
698 | static int __init setup_bus_notifier(void) | |
699 | { | |
700 | bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier); | |
701 | bus_register_notifier(&of_platform_bus_type, &ppc_dflt_of_bus_notifier); | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
706 | arch_initcall(setup_bus_notifier); |