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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> | |
35 | #include <asm/io.h> | |
36 | #include <asm/prom.h> | |
37 | #include <asm/processor.h> | |
a7f290da | 38 | #include <asm/vdso_datapage.h> |
03501dab | 39 | #include <asm/pgtable.h> |
03501dab PM |
40 | #include <asm/smp.h> |
41 | #include <asm/elf.h> | |
42 | #include <asm/machdep.h> | |
43 | #include <asm/time.h> | |
44 | #include <asm/cputable.h> | |
45 | #include <asm/sections.h> | |
e8222502 | 46 | #include <asm/firmware.h> |
03501dab PM |
47 | #include <asm/btext.h> |
48 | #include <asm/nvram.h> | |
49 | #include <asm/setup.h> | |
50 | #include <asm/system.h> | |
51 | #include <asm/rtas.h> | |
52 | #include <asm/iommu.h> | |
53 | #include <asm/serial.h> | |
54 | #include <asm/cache.h> | |
55 | #include <asm/page.h> | |
56 | #include <asm/mmu.h> | |
57 | #include <asm/lmb.h> | |
fca5dcd4 | 58 | #include <asm/xmon.h> |
03501dab | 59 | |
66ba135c SR |
60 | #include "setup.h" |
61 | ||
03501dab | 62 | #ifdef DEBUG |
f9e4ec57 | 63 | #include <asm/udbg.h> |
03501dab PM |
64 | #define DBG(fmt...) udbg_printf(fmt) |
65 | #else | |
66 | #define DBG(fmt...) | |
67 | #endif | |
68 | ||
e8222502 BH |
69 | /* The main machine-dep calls structure |
70 | */ | |
71 | struct machdep_calls ppc_md; | |
72 | EXPORT_SYMBOL(ppc_md); | |
73 | struct machdep_calls *machine_id; | |
74 | EXPORT_SYMBOL(machine_id); | |
799d6046 | 75 | |
49b09853 PM |
76 | unsigned long klimit = (unsigned long) _end; |
77 | ||
03501dab PM |
78 | /* |
79 | * This still seems to be needed... -- paulus | |
80 | */ | |
81 | struct screen_info screen_info = { | |
82 | .orig_x = 0, | |
83 | .orig_y = 25, | |
84 | .orig_video_cols = 80, | |
85 | .orig_video_lines = 25, | |
86 | .orig_video_isVGA = 1, | |
87 | .orig_video_points = 16 | |
88 | }; | |
89 | ||
90 | #ifdef __DO_IRQ_CANON | |
91 | /* XXX should go elsewhere eventually */ | |
92 | int ppc_do_canonicalize_irqs; | |
93 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
94 | #endif | |
95 | ||
96 | /* also used by kexec */ | |
97 | void machine_shutdown(void) | |
98 | { | |
3d1229d6 ME |
99 | if (ppc_md.machine_shutdown) |
100 | ppc_md.machine_shutdown(); | |
03501dab PM |
101 | } |
102 | ||
103 | void machine_restart(char *cmd) | |
104 | { | |
105 | machine_shutdown(); | |
b8e383d5 KG |
106 | if (ppc_md.restart) |
107 | ppc_md.restart(cmd); | |
03501dab PM |
108 | #ifdef CONFIG_SMP |
109 | smp_send_stop(); | |
110 | #endif | |
111 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
112 | local_irq_disable(); | |
113 | while (1) ; | |
114 | } | |
115 | ||
116 | void machine_power_off(void) | |
117 | { | |
118 | machine_shutdown(); | |
b8e383d5 KG |
119 | if (ppc_md.power_off) |
120 | ppc_md.power_off(); | |
03501dab PM |
121 | #ifdef CONFIG_SMP |
122 | smp_send_stop(); | |
123 | #endif | |
124 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
125 | local_irq_disable(); | |
126 | while (1) ; | |
127 | } | |
128 | /* Used by the G5 thermal driver */ | |
129 | EXPORT_SYMBOL_GPL(machine_power_off); | |
130 | ||
131 | void (*pm_power_off)(void) = machine_power_off; | |
132 | EXPORT_SYMBOL_GPL(pm_power_off); | |
133 | ||
134 | void machine_halt(void) | |
135 | { | |
136 | machine_shutdown(); | |
b8e383d5 KG |
137 | if (ppc_md.halt) |
138 | ppc_md.halt(); | |
03501dab PM |
139 | #ifdef CONFIG_SMP |
140 | smp_send_stop(); | |
141 | #endif | |
142 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
143 | local_irq_disable(); | |
144 | while (1) ; | |
145 | } | |
146 | ||
147 | ||
148 | #ifdef CONFIG_TAU | |
149 | extern u32 cpu_temp(unsigned long cpu); | |
150 | extern u32 cpu_temp_both(unsigned long cpu); | |
151 | #endif /* CONFIG_TAU */ | |
152 | ||
153 | #ifdef CONFIG_SMP | |
154 | DEFINE_PER_CPU(unsigned int, pvr); | |
155 | #endif | |
156 | ||
157 | static int show_cpuinfo(struct seq_file *m, void *v) | |
158 | { | |
159 | unsigned long cpu_id = (unsigned long)v - 1; | |
160 | unsigned int pvr; | |
161 | unsigned short maj; | |
162 | unsigned short min; | |
163 | ||
164 | if (cpu_id == NR_CPUS) { | |
165 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) | |
166 | unsigned long bogosum = 0; | |
167 | int i; | |
394e3902 AM |
168 | for_each_online_cpu(i) |
169 | bogosum += loops_per_jiffy; | |
03501dab PM |
170 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", |
171 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
172 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
173 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
e8222502 BH |
174 | if (ppc_md.name) |
175 | seq_printf(m, "platform\t: %s\n", ppc_md.name); | |
03501dab PM |
176 | if (ppc_md.show_cpuinfo != NULL) |
177 | ppc_md.show_cpuinfo(m); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | /* We only show online cpus: disable preempt (overzealous, I | |
183 | * knew) to prevent cpu going down. */ | |
184 | preempt_disable(); | |
185 | if (!cpu_online(cpu_id)) { | |
186 | preempt_enable(); | |
187 | return 0; | |
188 | } | |
189 | ||
190 | #ifdef CONFIG_SMP | |
03501dab | 191 | pvr = per_cpu(pvr, cpu_id); |
03501dab PM |
192 | #else |
193 | pvr = mfspr(SPRN_PVR); | |
194 | #endif | |
195 | maj = (pvr >> 8) & 0xFF; | |
196 | min = pvr & 0xFF; | |
197 | ||
198 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
199 | seq_printf(m, "cpu\t\t: "); | |
200 | ||
201 | if (cur_cpu_spec->pvr_mask) | |
202 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
203 | else | |
204 | seq_printf(m, "unknown (%08x)", pvr); | |
205 | ||
206 | #ifdef CONFIG_ALTIVEC | |
207 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
208 | seq_printf(m, ", altivec supported"); | |
209 | #endif /* CONFIG_ALTIVEC */ | |
210 | ||
211 | seq_printf(m, "\n"); | |
212 | ||
213 | #ifdef CONFIG_TAU | |
214 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
215 | #ifdef CONFIG_TAU_AVERAGE | |
216 | /* more straightforward, but potentially misleading */ | |
217 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
bccfd588 | 218 | cpu_temp(cpu_id)); |
03501dab PM |
219 | #else |
220 | /* show the actual temp sensor range */ | |
221 | u32 temp; | |
bccfd588 | 222 | temp = cpu_temp_both(cpu_id); |
03501dab PM |
223 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
224 | temp & 0xff, temp >> 16); | |
225 | #endif | |
226 | } | |
227 | #endif /* CONFIG_TAU */ | |
228 | ||
229 | /* | |
230 | * Assume here that all clock rates are the same in a | |
231 | * smp system. -- Cort | |
232 | */ | |
233 | if (ppc_proc_freq) | |
234 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", | |
235 | ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); | |
236 | ||
237 | if (ppc_md.show_percpuinfo != NULL) | |
238 | ppc_md.show_percpuinfo(m, cpu_id); | |
239 | ||
240 | /* If we are a Freescale core do a simple check so | |
241 | * we dont have to keep adding cases in the future */ | |
242 | if (PVR_VER(pvr) & 0x8000) { | |
243 | maj = PVR_MAJ(pvr); | |
244 | min = PVR_MIN(pvr); | |
245 | } else { | |
246 | switch (PVR_VER(pvr)) { | |
247 | case 0x0020: /* 403 family */ | |
248 | maj = PVR_MAJ(pvr) + 1; | |
249 | min = PVR_MIN(pvr); | |
250 | break; | |
251 | case 0x1008: /* 740P/750P ?? */ | |
252 | maj = ((pvr >> 8) & 0xFF) - 1; | |
253 | min = pvr & 0xFF; | |
254 | break; | |
255 | default: | |
256 | maj = (pvr >> 8) & 0xFF; | |
257 | min = pvr & 0xFF; | |
258 | break; | |
259 | } | |
260 | } | |
261 | ||
262 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
263 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
264 | ||
265 | #ifdef CONFIG_PPC32 | |
266 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
267 | loops_per_jiffy / (500000/HZ), | |
268 | (loops_per_jiffy / (5000/HZ)) % 100); | |
269 | #endif | |
270 | ||
271 | #ifdef CONFIG_SMP | |
272 | seq_printf(m, "\n"); | |
273 | #endif | |
274 | ||
275 | preempt_enable(); | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static void *c_start(struct seq_file *m, loff_t *pos) | |
280 | { | |
281 | unsigned long i = *pos; | |
282 | ||
283 | return i <= NR_CPUS ? (void *)(i + 1) : NULL; | |
284 | } | |
285 | ||
286 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
287 | { | |
288 | ++*pos; | |
289 | return c_start(m, pos); | |
290 | } | |
291 | ||
292 | static void c_stop(struct seq_file *m, void *v) | |
293 | { | |
294 | } | |
295 | ||
296 | struct seq_operations cpuinfo_op = { | |
297 | .start =c_start, | |
298 | .next = c_next, | |
299 | .stop = c_stop, | |
300 | .show = show_cpuinfo, | |
301 | }; | |
302 | ||
a82765b6 DW |
303 | void __init check_for_initrd(void) |
304 | { | |
305 | #ifdef CONFIG_BLK_DEV_INITRD | |
30437b3e DG |
306 | DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", |
307 | initrd_start, initrd_end); | |
a82765b6 DW |
308 | |
309 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
310 | * look sensible. If not, clear initrd reference. | |
311 | */ | |
51fae6de | 312 | if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
a82765b6 DW |
313 | initrd_end > initrd_start) |
314 | ROOT_DEV = Root_RAM0; | |
6761c4a0 | 315 | else |
a82765b6 | 316 | initrd_start = initrd_end = 0; |
a82765b6 DW |
317 | |
318 | if (initrd_start) | |
319 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
320 | ||
321 | DBG(" <- check_for_initrd()\n"); | |
322 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
323 | } | |
324 | ||
5ad57078 PM |
325 | #ifdef CONFIG_SMP |
326 | ||
327 | /** | |
328 | * setup_cpu_maps - initialize the following cpu maps: | |
329 | * cpu_possible_map | |
330 | * cpu_present_map | |
331 | * cpu_sibling_map | |
332 | * | |
333 | * Having the possible map set up early allows us to restrict allocations | |
334 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
335 | * | |
336 | * We do not initialize the online map here; cpus set their own bits in | |
337 | * cpu_online_map as they come up. | |
338 | * | |
339 | * This function is valid only for Open Firmware systems. finish_device_tree | |
340 | * must be called before using this. | |
341 | * | |
342 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
4df20460 AB |
343 | * |
344 | * NOTE: This must match the parsing done in early_init_dt_scan_cpus. | |
5ad57078 PM |
345 | */ |
346 | void __init smp_setup_cpu_maps(void) | |
347 | { | |
348 | struct device_node *dn = NULL; | |
349 | int cpu = 0; | |
5ad57078 PM |
350 | |
351 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
a7f67bdf | 352 | const int *intserv; |
5ad57078 PM |
353 | int j, len = sizeof(u32), nthreads = 1; |
354 | ||
a7f67bdf | 355 | intserv = get_property(dn, "ibm,ppc-interrupt-server#s", &len); |
5ad57078 PM |
356 | if (intserv) |
357 | nthreads = len / sizeof(int); | |
358 | else { | |
a7f67bdf | 359 | intserv = get_property(dn, "reg", NULL); |
5ad57078 PM |
360 | if (!intserv) |
361 | intserv = &cpu; /* assume logical == phys */ | |
362 | } | |
363 | ||
364 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
365 | cpu_set(cpu, cpu_present_map); | |
366 | set_hard_smp_processor_id(cpu, intserv[j]); | |
5ad57078 PM |
367 | cpu_set(cpu, cpu_possible_map); |
368 | cpu++; | |
369 | } | |
370 | } | |
371 | ||
5ad57078 PM |
372 | #ifdef CONFIG_PPC64 |
373 | /* | |
374 | * On pSeries LPAR, we need to know how many cpus | |
375 | * could possibly be added to this partition. | |
376 | */ | |
e8222502 | 377 | if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && |
799d6046 | 378 | (dn = of_find_node_by_path("/rtas"))) { |
5ad57078 | 379 | int num_addr_cell, num_size_cell, maxcpus; |
a7f67bdf | 380 | const unsigned int *ireg; |
5ad57078 | 381 | |
a8bda5dd | 382 | num_addr_cell = of_n_addr_cells(dn); |
9213feea | 383 | num_size_cell = of_n_size_cells(dn); |
5ad57078 | 384 | |
a7f67bdf | 385 | ireg = get_property(dn, "ibm,lrdr-capacity", NULL); |
5ad57078 PM |
386 | |
387 | if (!ireg) | |
388 | goto out; | |
389 | ||
390 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
391 | ||
392 | /* Double maxcpus for processors which have SMT capability */ | |
393 | if (cpu_has_feature(CPU_FTR_SMT)) | |
394 | maxcpus *= 2; | |
395 | ||
396 | if (maxcpus > NR_CPUS) { | |
397 | printk(KERN_WARNING | |
398 | "Partition configured for %d cpus, " | |
399 | "operating system maximum is %d.\n", | |
400 | maxcpus, NR_CPUS); | |
401 | maxcpus = NR_CPUS; | |
402 | } else | |
403 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
404 | maxcpus); | |
405 | ||
406 | for (cpu = 0; cpu < maxcpus; cpu++) | |
407 | cpu_set(cpu, cpu_possible_map); | |
408 | out: | |
409 | of_node_put(dn); | |
410 | } | |
411 | ||
412 | /* | |
413 | * Do the sibling map; assume only two threads per processor. | |
414 | */ | |
0e551954 | 415 | for_each_possible_cpu(cpu) { |
5ad57078 PM |
416 | cpu_set(cpu, cpu_sibling_map[cpu]); |
417 | if (cpu_has_feature(CPU_FTR_SMT)) | |
418 | cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); | |
419 | } | |
420 | ||
a7f290da | 421 | vdso_data->processorCount = num_present_cpus(); |
5ad57078 PM |
422 | #endif /* CONFIG_PPC64 */ |
423 | } | |
424 | #endif /* CONFIG_SMP */ | |
fca5dcd4 | 425 | |
e5c6c8e4 MN |
426 | static __init int add_pcspkr(void) |
427 | { | |
428 | struct device_node *np; | |
429 | struct platform_device *pd; | |
430 | int ret; | |
431 | ||
432 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); | |
433 | of_node_put(np); | |
434 | if (!np) | |
435 | return -ENODEV; | |
436 | ||
437 | pd = platform_device_alloc("pcspkr", -1); | |
438 | if (!pd) | |
439 | return -ENOMEM; | |
440 | ||
441 | ret = platform_device_add(pd); | |
442 | if (ret) | |
443 | platform_device_put(pd); | |
444 | ||
445 | return ret; | |
446 | } | |
447 | device_initcall(add_pcspkr); | |
95d465fd | 448 | |
e8222502 BH |
449 | void probe_machine(void) |
450 | { | |
451 | extern struct machdep_calls __machine_desc_start; | |
452 | extern struct machdep_calls __machine_desc_end; | |
453 | ||
454 | /* | |
455 | * Iterate all ppc_md structures until we find the proper | |
456 | * one for the current machine type | |
457 | */ | |
458 | DBG("Probing machine type ...\n"); | |
459 | ||
460 | for (machine_id = &__machine_desc_start; | |
461 | machine_id < &__machine_desc_end; | |
462 | machine_id++) { | |
463 | DBG(" %s ...", machine_id->name); | |
464 | memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); | |
465 | if (ppc_md.probe()) { | |
466 | DBG(" match !\n"); | |
467 | break; | |
468 | } | |
469 | DBG("\n"); | |
470 | } | |
471 | /* What can we do if we didn't find ? */ | |
472 | if (machine_id >= &__machine_desc_end) { | |
473 | DBG("No suitable machine found !\n"); | |
474 | for (;;); | |
475 | } | |
476 | ||
477 | printk(KERN_INFO "Using %s machine description\n", ppc_md.name); | |
478 | } | |
1269277a DW |
479 | |
480 | int check_legacy_ioport(unsigned long base_port) | |
481 | { | |
482 | if (ppc_md.check_legacy_ioport == NULL) | |
483 | return 0; | |
484 | return ppc_md.check_legacy_ioport(base_port); | |
485 | } | |
486 | EXPORT_SYMBOL(check_legacy_ioport); | |
7e990266 KG |
487 | |
488 | static int ppc_panic_event(struct notifier_block *this, | |
489 | unsigned long event, void *ptr) | |
490 | { | |
491 | ppc_md.panic(ptr); /* May not return */ | |
492 | return NOTIFY_DONE; | |
493 | } | |
494 | ||
495 | static struct notifier_block ppc_panic_block = { | |
496 | .notifier_call = ppc_panic_event, | |
497 | .priority = INT_MIN /* may not return; must be done last */ | |
498 | }; | |
499 | ||
500 | void __init setup_panic(void) | |
501 | { | |
502 | atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); | |
503 | } |