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1da177e4 LT |
1 | /* |
2 | * | |
3 | * Procedures for interfacing to the RTAS on CHRP machines. | |
4 | * | |
5 | * Peter Bergner, IBM March 2001. | |
6 | * Copyright (C) 2001 IBM. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <stdarg.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/spinlock.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | ||
21 | #include <asm/prom.h> | |
22 | #include <asm/rtas.h> | |
23 | #include <asm/semaphore.h> | |
24 | #include <asm/machdep.h> | |
25 | #include <asm/page.h> | |
26 | #include <asm/param.h> | |
27 | #include <asm/system.h> | |
28 | #include <asm/abs_addr.h> | |
29 | #include <asm/udbg.h> | |
30 | #include <asm/delay.h> | |
31 | #include <asm/uaccess.h> | |
32 | #include <asm/systemcfg.h> | |
33 | ||
34 | struct flash_block_list_header rtas_firmware_flash_list = {0, NULL}; | |
35 | ||
36 | struct rtas_t rtas = { | |
37 | .lock = SPIN_LOCK_UNLOCKED | |
38 | }; | |
39 | ||
40 | EXPORT_SYMBOL(rtas); | |
41 | ||
42 | char rtas_err_buf[RTAS_ERROR_LOG_MAX]; | |
43 | ||
44 | DEFINE_SPINLOCK(rtas_data_buf_lock); | |
45 | char rtas_data_buf[RTAS_DATA_BUF_SIZE]__page_aligned; | |
46 | unsigned long rtas_rmo_buf; | |
47 | ||
48 | void | |
49 | call_rtas_display_status(unsigned char c) | |
50 | { | |
51 | struct rtas_args *args = &rtas.args; | |
52 | unsigned long s; | |
53 | ||
54 | if (!rtas.base) | |
55 | return; | |
56 | spin_lock_irqsave(&rtas.lock, s); | |
57 | ||
58 | args->token = 10; | |
59 | args->nargs = 1; | |
60 | args->nret = 1; | |
61 | args->rets = (rtas_arg_t *)&(args->args[1]); | |
62 | args->args[0] = (int)c; | |
63 | ||
64 | enter_rtas(__pa(args)); | |
65 | ||
66 | spin_unlock_irqrestore(&rtas.lock, s); | |
67 | } | |
68 | ||
69 | void | |
70 | call_rtas_display_status_delay(unsigned char c) | |
71 | { | |
72 | static int pending_newline = 0; /* did last write end with unprinted newline? */ | |
73 | static int width = 16; | |
74 | ||
75 | if (c == '\n') { | |
76 | while (width-- > 0) | |
77 | call_rtas_display_status(' '); | |
78 | width = 16; | |
79 | udelay(500000); | |
80 | pending_newline = 1; | |
81 | } else { | |
82 | if (pending_newline) { | |
83 | call_rtas_display_status('\r'); | |
84 | call_rtas_display_status('\n'); | |
85 | } | |
86 | pending_newline = 0; | |
87 | if (width--) { | |
88 | call_rtas_display_status(c); | |
89 | udelay(10000); | |
90 | } | |
91 | } | |
92 | } | |
93 | ||
94 | int | |
95 | rtas_token(const char *service) | |
96 | { | |
97 | int *tokp; | |
98 | if (rtas.dev == NULL) { | |
99 | PPCDBG(PPCDBG_RTAS,"\tNo rtas device in device-tree...\n"); | |
100 | return RTAS_UNKNOWN_SERVICE; | |
101 | } | |
102 | tokp = (int *) get_property(rtas.dev, service, NULL); | |
103 | return tokp ? *tokp : RTAS_UNKNOWN_SERVICE; | |
104 | } | |
105 | ||
106 | /* | |
107 | * Return the firmware-specified size of the error log buffer | |
108 | * for all rtas calls that require an error buffer argument. | |
109 | * This includes 'check-exception' and 'rtas-last-error'. | |
110 | */ | |
111 | int rtas_get_error_log_max(void) | |
112 | { | |
113 | static int rtas_error_log_max; | |
114 | if (rtas_error_log_max) | |
115 | return rtas_error_log_max; | |
116 | ||
117 | rtas_error_log_max = rtas_token ("rtas-error-log-max"); | |
118 | if ((rtas_error_log_max == RTAS_UNKNOWN_SERVICE) || | |
119 | (rtas_error_log_max > RTAS_ERROR_LOG_MAX)) { | |
120 | printk (KERN_WARNING "RTAS: bad log buffer size %d\n", rtas_error_log_max); | |
121 | rtas_error_log_max = RTAS_ERROR_LOG_MAX; | |
122 | } | |
123 | return rtas_error_log_max; | |
124 | } | |
125 | ||
126 | ||
127 | /** Return a copy of the detailed error text associated with the | |
128 | * most recent failed call to rtas. Because the error text | |
129 | * might go stale if there are any other intervening rtas calls, | |
130 | * this routine must be called atomically with whatever produced | |
131 | * the error (i.e. with rtas.lock still held from the previous call). | |
132 | */ | |
133 | static int | |
134 | __fetch_rtas_last_error(void) | |
135 | { | |
136 | struct rtas_args err_args, save_args; | |
137 | u32 bufsz; | |
138 | ||
139 | bufsz = rtas_get_error_log_max(); | |
140 | ||
141 | err_args.token = rtas_token("rtas-last-error"); | |
142 | err_args.nargs = 2; | |
143 | err_args.nret = 1; | |
144 | ||
145 | err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf); | |
146 | err_args.args[1] = bufsz; | |
147 | err_args.args[2] = 0; | |
148 | ||
149 | save_args = rtas.args; | |
150 | rtas.args = err_args; | |
151 | ||
152 | enter_rtas(__pa(&rtas.args)); | |
153 | ||
154 | err_args = rtas.args; | |
155 | rtas.args = save_args; | |
156 | ||
157 | return err_args.args[2]; | |
158 | } | |
159 | ||
160 | int rtas_call(int token, int nargs, int nret, int *outputs, ...) | |
161 | { | |
162 | va_list list; | |
163 | int i, logit = 0; | |
164 | unsigned long s; | |
165 | struct rtas_args *rtas_args; | |
166 | char * buff_copy = NULL; | |
167 | int ret; | |
168 | ||
169 | PPCDBG(PPCDBG_RTAS, "Entering rtas_call\n"); | |
170 | PPCDBG(PPCDBG_RTAS, "\ttoken = 0x%x\n", token); | |
171 | PPCDBG(PPCDBG_RTAS, "\tnargs = %d\n", nargs); | |
172 | PPCDBG(PPCDBG_RTAS, "\tnret = %d\n", nret); | |
173 | PPCDBG(PPCDBG_RTAS, "\t&outputs = 0x%lx\n", outputs); | |
174 | if (token == RTAS_UNKNOWN_SERVICE) | |
175 | return -1; | |
176 | ||
177 | /* Gotta do something different here, use global lock for now... */ | |
178 | spin_lock_irqsave(&rtas.lock, s); | |
179 | rtas_args = &rtas.args; | |
180 | ||
181 | rtas_args->token = token; | |
182 | rtas_args->nargs = nargs; | |
183 | rtas_args->nret = nret; | |
184 | rtas_args->rets = (rtas_arg_t *)&(rtas_args->args[nargs]); | |
185 | va_start(list, outputs); | |
186 | for (i = 0; i < nargs; ++i) { | |
187 | rtas_args->args[i] = va_arg(list, rtas_arg_t); | |
188 | PPCDBG(PPCDBG_RTAS, "\tnarg[%d] = 0x%x\n", i, rtas_args->args[i]); | |
189 | } | |
190 | va_end(list); | |
191 | ||
192 | for (i = 0; i < nret; ++i) | |
193 | rtas_args->rets[i] = 0; | |
194 | ||
195 | PPCDBG(PPCDBG_RTAS, "\tentering rtas with 0x%lx\n", | |
196 | __pa(rtas_args)); | |
197 | enter_rtas(__pa(rtas_args)); | |
198 | PPCDBG(PPCDBG_RTAS, "\treturned from rtas ...\n"); | |
199 | ||
200 | /* A -1 return code indicates that the last command couldn't | |
201 | be completed due to a hardware error. */ | |
202 | if (rtas_args->rets[0] == -1) | |
203 | logit = (__fetch_rtas_last_error() == 0); | |
204 | ||
205 | ifppcdebug(PPCDBG_RTAS) { | |
206 | for(i=0; i < nret ;i++) | |
207 | udbg_printf("\tnret[%d] = 0x%lx\n", i, (ulong)rtas_args->rets[i]); | |
208 | } | |
209 | ||
210 | if (nret > 1 && outputs != NULL) | |
211 | for (i = 0; i < nret-1; ++i) | |
212 | outputs[i] = rtas_args->rets[i+1]; | |
213 | ret = (nret > 0)? rtas_args->rets[0]: 0; | |
214 | ||
215 | /* Log the error in the unlikely case that there was one. */ | |
216 | if (unlikely(logit)) { | |
217 | buff_copy = rtas_err_buf; | |
218 | if (mem_init_done) { | |
219 | buff_copy = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC); | |
220 | if (buff_copy) | |
221 | memcpy(buff_copy, rtas_err_buf, | |
222 | RTAS_ERROR_LOG_MAX); | |
223 | } | |
224 | } | |
225 | ||
226 | /* Gotta do something different here, use global lock for now... */ | |
227 | spin_unlock_irqrestore(&rtas.lock, s); | |
228 | ||
229 | if (buff_copy) { | |
230 | log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0); | |
231 | if (mem_init_done) | |
232 | kfree(buff_copy); | |
233 | } | |
234 | return ret; | |
235 | } | |
236 | ||
237 | /* Given an RTAS status code of 990n compute the hinted delay of 10^n | |
238 | * (last digit) milliseconds. For now we bound at n=5 (100 sec). | |
239 | */ | |
240 | unsigned int | |
241 | rtas_extended_busy_delay_time(int status) | |
242 | { | |
243 | int order = status - 9900; | |
244 | unsigned long ms; | |
245 | ||
246 | if (order < 0) | |
247 | order = 0; /* RTC depends on this for -2 clock busy */ | |
248 | else if (order > 5) | |
249 | order = 5; /* bound */ | |
250 | ||
251 | /* Use microseconds for reasonable accuracy */ | |
252 | for (ms=1; order > 0; order--) | |
253 | ms *= 10; | |
254 | ||
255 | return ms; | |
256 | } | |
257 | ||
258 | int rtas_error_rc(int rtas_rc) | |
259 | { | |
260 | int rc; | |
261 | ||
262 | switch (rtas_rc) { | |
263 | case -1: /* Hardware Error */ | |
264 | rc = -EIO; | |
265 | break; | |
266 | case -3: /* Bad indicator/domain/etc */ | |
267 | rc = -EINVAL; | |
268 | break; | |
269 | case -9000: /* Isolation error */ | |
270 | rc = -EFAULT; | |
271 | break; | |
272 | case -9001: /* Outstanding TCE/PTE */ | |
273 | rc = -EEXIST; | |
274 | break; | |
275 | case -9002: /* No usable slot */ | |
276 | rc = -ENODEV; | |
277 | break; | |
278 | default: | |
279 | printk(KERN_ERR "%s: unexpected RTAS error %d\n", | |
280 | __FUNCTION__, rtas_rc); | |
281 | rc = -ERANGE; | |
282 | break; | |
283 | } | |
284 | return rc; | |
285 | } | |
286 | ||
287 | int rtas_get_power_level(int powerdomain, int *level) | |
288 | { | |
289 | int token = rtas_token("get-power-level"); | |
290 | int rc; | |
291 | ||
292 | if (token == RTAS_UNKNOWN_SERVICE) | |
293 | return -ENOENT; | |
294 | ||
295 | while ((rc = rtas_call(token, 1, 2, level, powerdomain)) == RTAS_BUSY) | |
296 | udelay(1); | |
297 | ||
298 | if (rc < 0) | |
299 | return rtas_error_rc(rc); | |
300 | return rc; | |
301 | } | |
302 | ||
303 | int rtas_set_power_level(int powerdomain, int level, int *setlevel) | |
304 | { | |
305 | int token = rtas_token("set-power-level"); | |
306 | unsigned int wait_time; | |
307 | int rc; | |
308 | ||
309 | if (token == RTAS_UNKNOWN_SERVICE) | |
310 | return -ENOENT; | |
311 | ||
312 | while (1) { | |
313 | rc = rtas_call(token, 2, 2, setlevel, powerdomain, level); | |
314 | if (rc == RTAS_BUSY) | |
315 | udelay(1); | |
316 | else if (rtas_is_extended_busy(rc)) { | |
317 | wait_time = rtas_extended_busy_delay_time(rc); | |
318 | udelay(wait_time * 1000); | |
319 | } else | |
320 | break; | |
321 | } | |
322 | ||
323 | if (rc < 0) | |
324 | return rtas_error_rc(rc); | |
325 | return rc; | |
326 | } | |
327 | ||
328 | int rtas_get_sensor(int sensor, int index, int *state) | |
329 | { | |
330 | int token = rtas_token("get-sensor-state"); | |
331 | unsigned int wait_time; | |
332 | int rc; | |
333 | ||
334 | if (token == RTAS_UNKNOWN_SERVICE) | |
335 | return -ENOENT; | |
336 | ||
337 | while (1) { | |
338 | rc = rtas_call(token, 2, 2, state, sensor, index); | |
339 | if (rc == RTAS_BUSY) | |
340 | udelay(1); | |
341 | else if (rtas_is_extended_busy(rc)) { | |
342 | wait_time = rtas_extended_busy_delay_time(rc); | |
343 | udelay(wait_time * 1000); | |
344 | } else | |
345 | break; | |
346 | } | |
347 | ||
348 | if (rc < 0) | |
349 | return rtas_error_rc(rc); | |
350 | return rc; | |
351 | } | |
352 | ||
353 | int rtas_set_indicator(int indicator, int index, int new_value) | |
354 | { | |
355 | int token = rtas_token("set-indicator"); | |
356 | unsigned int wait_time; | |
357 | int rc; | |
358 | ||
359 | if (token == RTAS_UNKNOWN_SERVICE) | |
360 | return -ENOENT; | |
361 | ||
362 | while (1) { | |
363 | rc = rtas_call(token, 3, 1, NULL, indicator, index, new_value); | |
364 | if (rc == RTAS_BUSY) | |
365 | udelay(1); | |
366 | else if (rtas_is_extended_busy(rc)) { | |
367 | wait_time = rtas_extended_busy_delay_time(rc); | |
368 | udelay(wait_time * 1000); | |
369 | } | |
370 | else | |
371 | break; | |
372 | } | |
373 | ||
374 | if (rc < 0) | |
375 | return rtas_error_rc(rc); | |
376 | return rc; | |
377 | } | |
378 | ||
379 | #define FLASH_BLOCK_LIST_VERSION (1UL) | |
380 | static void | |
381 | rtas_flash_firmware(void) | |
382 | { | |
383 | unsigned long image_size; | |
384 | struct flash_block_list *f, *next, *flist; | |
385 | unsigned long rtas_block_list; | |
386 | int i, status, update_token; | |
387 | ||
388 | update_token = rtas_token("ibm,update-flash-64-and-reboot"); | |
389 | if (update_token == RTAS_UNKNOWN_SERVICE) { | |
390 | printk(KERN_ALERT "FLASH: ibm,update-flash-64-and-reboot is not available -- not a service partition?\n"); | |
391 | printk(KERN_ALERT "FLASH: firmware will not be flashed\n"); | |
392 | return; | |
393 | } | |
394 | ||
395 | /* NOTE: the "first" block list is a global var with no data | |
396 | * blocks in the kernel data segment. We do this because | |
397 | * we want to ensure this block_list addr is under 4GB. | |
398 | */ | |
399 | rtas_firmware_flash_list.num_blocks = 0; | |
400 | flist = (struct flash_block_list *)&rtas_firmware_flash_list; | |
401 | rtas_block_list = virt_to_abs(flist); | |
402 | if (rtas_block_list >= 4UL*1024*1024*1024) { | |
403 | printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n"); | |
404 | return; | |
405 | } | |
406 | ||
407 | printk(KERN_ALERT "FLASH: preparing saved firmware image for flash\n"); | |
408 | /* Update the block_list in place. */ | |
409 | image_size = 0; | |
410 | for (f = flist; f; f = next) { | |
411 | /* Translate data addrs to absolute */ | |
412 | for (i = 0; i < f->num_blocks; i++) { | |
413 | f->blocks[i].data = (char *)virt_to_abs(f->blocks[i].data); | |
414 | image_size += f->blocks[i].length; | |
415 | } | |
416 | next = f->next; | |
417 | /* Don't translate NULL pointer for last entry */ | |
418 | if (f->next) | |
419 | f->next = (struct flash_block_list *)virt_to_abs(f->next); | |
420 | else | |
421 | f->next = NULL; | |
422 | /* make num_blocks into the version/length field */ | |
423 | f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16); | |
424 | } | |
425 | ||
426 | printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size); | |
427 | printk(KERN_ALERT "FLASH: performing flash and reboot\n"); | |
428 | ppc_md.progress("Flashing \n", 0x0); | |
429 | ppc_md.progress("Please Wait... ", 0x0); | |
430 | printk(KERN_ALERT "FLASH: this will take several minutes. Do not power off!\n"); | |
431 | status = rtas_call(update_token, 1, 1, NULL, rtas_block_list); | |
432 | switch (status) { /* should only get "bad" status */ | |
433 | case 0: | |
434 | printk(KERN_ALERT "FLASH: success\n"); | |
435 | break; | |
436 | case -1: | |
437 | printk(KERN_ALERT "FLASH: hardware error. Firmware may not be not flashed\n"); | |
438 | break; | |
439 | case -3: | |
440 | printk(KERN_ALERT "FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n"); | |
441 | break; | |
442 | case -4: | |
443 | printk(KERN_ALERT "FLASH: flash failed when partially complete. System may not reboot\n"); | |
444 | break; | |
445 | default: | |
446 | printk(KERN_ALERT "FLASH: unknown flash return code %d\n", status); | |
447 | break; | |
448 | } | |
449 | } | |
450 | ||
451 | void rtas_flash_bypass_warning(void) | |
452 | { | |
453 | printk(KERN_ALERT "FLASH: firmware flash requires a reboot\n"); | |
454 | printk(KERN_ALERT "FLASH: the firmware image will NOT be flashed\n"); | |
455 | } | |
456 | ||
457 | ||
458 | void | |
459 | rtas_restart(char *cmd) | |
460 | { | |
461 | if (rtas_firmware_flash_list.next) | |
462 | rtas_flash_firmware(); | |
463 | ||
464 | printk("RTAS system-reboot returned %d\n", | |
465 | rtas_call(rtas_token("system-reboot"), 0, 1, NULL)); | |
466 | for (;;); | |
467 | } | |
468 | ||
469 | void | |
470 | rtas_power_off(void) | |
471 | { | |
472 | if (rtas_firmware_flash_list.next) | |
473 | rtas_flash_bypass_warning(); | |
474 | /* allow power on only with power button press */ | |
475 | printk("RTAS power-off returned %d\n", | |
476 | rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1)); | |
477 | for (;;); | |
478 | } | |
479 | ||
480 | void | |
481 | rtas_halt(void) | |
482 | { | |
483 | if (rtas_firmware_flash_list.next) | |
484 | rtas_flash_bypass_warning(); | |
485 | rtas_power_off(); | |
486 | } | |
487 | ||
488 | /* Must be in the RMO region, so we place it here */ | |
489 | static char rtas_os_term_buf[2048]; | |
490 | ||
491 | void rtas_os_term(char *str) | |
492 | { | |
493 | int status; | |
494 | ||
495 | if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term")) | |
496 | return; | |
497 | ||
498 | snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str); | |
499 | ||
500 | do { | |
501 | status = rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL, | |
502 | __pa(rtas_os_term_buf)); | |
503 | ||
504 | if (status == RTAS_BUSY) | |
505 | udelay(1); | |
506 | else if (status != 0) | |
507 | printk(KERN_EMERG "ibm,os-term call failed %d\n", | |
508 | status); | |
509 | } while (status == RTAS_BUSY); | |
510 | } | |
511 | ||
512 | ||
513 | asmlinkage int ppc_rtas(struct rtas_args __user *uargs) | |
514 | { | |
515 | struct rtas_args args; | |
516 | unsigned long flags; | |
517 | char * buff_copy; | |
518 | int nargs; | |
519 | int err_rc = 0; | |
520 | ||
521 | if (!capable(CAP_SYS_ADMIN)) | |
522 | return -EPERM; | |
523 | ||
524 | if (copy_from_user(&args, uargs, 3 * sizeof(u32)) != 0) | |
525 | return -EFAULT; | |
526 | ||
527 | nargs = args.nargs; | |
528 | if (nargs > ARRAY_SIZE(args.args) | |
529 | || args.nret > ARRAY_SIZE(args.args) | |
530 | || nargs + args.nret > ARRAY_SIZE(args.args)) | |
531 | return -EINVAL; | |
532 | ||
533 | /* Copy in args. */ | |
534 | if (copy_from_user(args.args, uargs->args, | |
535 | nargs * sizeof(rtas_arg_t)) != 0) | |
536 | return -EFAULT; | |
537 | ||
538 | buff_copy = kmalloc(RTAS_ERROR_LOG_MAX, GFP_KERNEL); | |
539 | ||
540 | spin_lock_irqsave(&rtas.lock, flags); | |
541 | ||
542 | rtas.args = args; | |
543 | enter_rtas(__pa(&rtas.args)); | |
544 | args = rtas.args; | |
545 | ||
546 | args.rets = &args.args[nargs]; | |
547 | ||
548 | /* A -1 return code indicates that the last command couldn't | |
549 | be completed due to a hardware error. */ | |
550 | if (args.rets[0] == -1) { | |
551 | err_rc = __fetch_rtas_last_error(); | |
552 | if ((err_rc == 0) && buff_copy) { | |
553 | memcpy(buff_copy, rtas_err_buf, RTAS_ERROR_LOG_MAX); | |
554 | } | |
555 | } | |
556 | ||
557 | spin_unlock_irqrestore(&rtas.lock, flags); | |
558 | ||
559 | if (buff_copy) { | |
560 | if ((args.rets[0] == -1) && (err_rc == 0)) { | |
561 | log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0); | |
562 | } | |
563 | kfree(buff_copy); | |
564 | } | |
565 | ||
566 | /* Copy out args. */ | |
567 | if (copy_to_user(uargs->args + nargs, | |
568 | args.args + nargs, | |
569 | args.nret * sizeof(rtas_arg_t)) != 0) | |
570 | return -EFAULT; | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
575 | /* This version can't take the spinlock, because it never returns */ | |
576 | ||
577 | struct rtas_args rtas_stop_self_args = { | |
578 | /* The token is initialized for real in setup_system() */ | |
579 | .token = RTAS_UNKNOWN_SERVICE, | |
580 | .nargs = 0, | |
581 | .nret = 1, | |
582 | .rets = &rtas_stop_self_args.args[0], | |
583 | }; | |
584 | ||
585 | void rtas_stop_self(void) | |
586 | { | |
587 | struct rtas_args *rtas_args = &rtas_stop_self_args; | |
588 | ||
589 | local_irq_disable(); | |
590 | ||
591 | BUG_ON(rtas_args->token == RTAS_UNKNOWN_SERVICE); | |
592 | ||
593 | printk("cpu %u (hwid %u) Ready to die...\n", | |
594 | smp_processor_id(), hard_smp_processor_id()); | |
595 | enter_rtas(__pa(rtas_args)); | |
596 | ||
597 | panic("Alas, I survived.\n"); | |
598 | } | |
599 | ||
600 | /* | |
601 | * Call early during boot, before mem init or bootmem, to retreive the RTAS | |
602 | * informations from the device-tree and allocate the RMO buffer for userland | |
603 | * accesses. | |
604 | */ | |
605 | void __init rtas_initialize(void) | |
606 | { | |
607 | /* Get RTAS dev node and fill up our "rtas" structure with infos | |
608 | * about it. | |
609 | */ | |
610 | rtas.dev = of_find_node_by_name(NULL, "rtas"); | |
611 | if (rtas.dev) { | |
612 | u32 *basep, *entryp; | |
613 | u32 *sizep; | |
614 | ||
615 | basep = (u32 *)get_property(rtas.dev, "linux,rtas-base", NULL); | |
616 | sizep = (u32 *)get_property(rtas.dev, "rtas-size", NULL); | |
617 | if (basep != NULL && sizep != NULL) { | |
618 | rtas.base = *basep; | |
619 | rtas.size = *sizep; | |
620 | entryp = (u32 *)get_property(rtas.dev, "linux,rtas-entry", NULL); | |
621 | if (entryp == NULL) /* Ugh */ | |
622 | rtas.entry = rtas.base; | |
623 | else | |
624 | rtas.entry = *entryp; | |
625 | } else | |
626 | rtas.dev = NULL; | |
627 | } | |
628 | /* If RTAS was found, allocate the RMO buffer for it and look for | |
629 | * the stop-self token if any | |
630 | */ | |
631 | if (rtas.dev) { | |
632 | unsigned long rtas_region = RTAS_INSTANTIATE_MAX; | |
633 | if (systemcfg->platform == PLATFORM_PSERIES_LPAR) | |
634 | rtas_region = min(lmb.rmo_size, RTAS_INSTANTIATE_MAX); | |
635 | ||
636 | rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE, | |
637 | rtas_region); | |
638 | ||
639 | #ifdef CONFIG_HOTPLUG_CPU | |
640 | rtas_stop_self_args.token = rtas_token("stop-self"); | |
641 | #endif /* CONFIG_HOTPLUG_CPU */ | |
642 | } | |
643 | ||
644 | } | |
645 | ||
646 | ||
647 | EXPORT_SYMBOL(rtas_firmware_flash_list); | |
648 | EXPORT_SYMBOL(rtas_token); | |
649 | EXPORT_SYMBOL(rtas_call); | |
650 | EXPORT_SYMBOL(rtas_data_buf); | |
651 | EXPORT_SYMBOL(rtas_data_buf_lock); | |
652 | EXPORT_SYMBOL(rtas_extended_busy_delay_time); | |
653 | EXPORT_SYMBOL(rtas_get_sensor); | |
654 | EXPORT_SYMBOL(rtas_get_power_level); | |
655 | EXPORT_SYMBOL(rtas_set_power_level); | |
656 | EXPORT_SYMBOL(rtas_set_indicator); | |
657 | EXPORT_SYMBOL(rtas_get_error_log_max); |