arch/powerpc/kernel/rtas.c

   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 #include <linux/capability.h>
  21 #include <linux/delay.h>
  22
  23 #include <asm/prom.h>
  24 #include <asm/rtas.h>
  25 #include <asm/semaphore.h>
  26 #include <asm/machdep.h>
  27 #include <asm/page.h>
  28 #include <asm/param.h>
  29 #include <asm/system.h>
  30 #include <asm/delay.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/lmb.h>
  33 #include <asm/udbg.h>
  34
  35 struct rtas_t rtas = {
  36         .lock = SPIN_LOCK_UNLOCKED
  37 };
  38
  39 EXPORT_SYMBOL(rtas);
  40
  41 DEFINE_SPINLOCK(rtas_data_buf_lock);
  42 char rtas_data_buf[RTAS_DATA_BUF_SIZE] __cacheline_aligned;
  43 unsigned long rtas_rmo_buf;
  44
  45 /*
  46  * If non-NULL, this gets called when the kernel terminates.
  47  * This is done like this so rtas_flash can be a module.
  48  */
  49 void (*rtas_flash_term_hook)(int);
  50 EXPORT_SYMBOL(rtas_flash_term_hook);
  51
  52 /*
  53  * call_rtas_display_status and call_rtas_display_status_delay
  54  * are designed only for very early low-level debugging, which
  55  * is why the token is hard-coded to 10.
  56  */
  57 static void call_rtas_display_status(char c)
  58 {
  59         struct rtas_args *args = &rtas.args;
  60         unsigned long s;
  61
  62         if (!rtas.base)
  63                 return;
  64         spin_lock_irqsave(&rtas.lock, s);
  65
  66         args->token = 10;
  67         args->nargs = 1;
  68         args->nret  = 1;
  69         args->rets  = (rtas_arg_t *)&(args->args[1]);
  70         args->args[0] = (unsigned char)c;
  71
  72         enter_rtas(__pa(args));
  73
  74         spin_unlock_irqrestore(&rtas.lock, s);
  75 }
  76
  77 static void call_rtas_display_status_delay(char c)
  78 {
  79         static int pending_newline = 0;  /* did last write end with unprinted newline? */
  80         static int width = 16;
  81
  82         if (c == '\n') {
  83                 while (width-- > 0)
  84                         call_rtas_display_status(' ');
  85                 width = 16;
  86                 mdelay(500);
  87                 pending_newline = 1;
  88         } else {
  89                 if (pending_newline) {
  90                         call_rtas_display_status('\r');
  91                         call_rtas_display_status('\n');
  92                 }
  93                 pending_newline = 0;
  94                 if (width--) {
  95                         call_rtas_display_status(c);
  96                         udelay(10000);
  97                 }
  98         }
  99 }
 100
 101 void __init udbg_init_rtas(void)
 102 {
 103         udbg_putc = call_rtas_display_status_delay;
 104 }
 105
 106 void rtas_progress(char *s, unsigned short hex)
 107 {
 108         struct device_node *root;
 109         int width, *p;
 110         char *os;
 111         static int display_character, set_indicator;
 112         static int display_width, display_lines, *row_width, form_feed;
 113         static DEFINE_SPINLOCK(progress_lock);
 114         static int current_line;
 115         static int pending_newline = 0;  /* did last write end with unprinted newline? */
 116
 117         if (!rtas.base)
 118                 return;
 119
 120         if (display_width == 0) {
 121                 display_width = 0x10;
 122                 if ((root = find_path_device("/rtas"))) {
 123                         if ((p = (unsigned int *)get_property(root,
 124                                         "ibm,display-line-length", NULL)))
 125                                 display_width = *p;
 126                         if ((p = (unsigned int *)get_property(root,
 127                                         "ibm,form-feed", NULL)))
 128                                 form_feed = *p;
 129                         if ((p = (unsigned int *)get_property(root,
 130                                         "ibm,display-number-of-lines", NULL)))
 131                                 display_lines = *p;
 132                         row_width = (unsigned int *)get_property(root,
 133                                         "ibm,display-truncation-length", NULL);
 134                 }
 135                 display_character = rtas_token("display-character");
 136                 set_indicator = rtas_token("set-indicator");
 137         }
 138
 139         if (display_character == RTAS_UNKNOWN_SERVICE) {
 140                 /* use hex display if available */
 141                 if (set_indicator != RTAS_UNKNOWN_SERVICE)
 142                         rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex);
 143                 return;
 144         }
 145
 146         spin_lock(&progress_lock);
 147
 148         /*
 149          * Last write ended with newline, but we didn't print it since
 150          * it would just clear the bottom line of output. Print it now
 151          * instead.
 152          *
 153          * If no newline is pending and form feed is supported, clear the
 154          * display with a form feed; otherwise, print a CR to start output
 155          * at the beginning of the line.
 156          */
 157         if (pending_newline) {
 158                 rtas_call(display_character, 1, 1, NULL, '\r');
 159                 rtas_call(display_character, 1, 1, NULL, '\n');
 160                 pending_newline = 0;
 161         } else {
 162                 current_line = 0;
 163                 if (form_feed)
 164                         rtas_call(display_character, 1, 1, NULL,
 165                                   (char)form_feed);
 166                 else
 167                         rtas_call(display_character, 1, 1, NULL, '\r');
 168         }
 169
 170         if (row_width)
 171                 width = row_width[current_line];
 172         else
 173                 width = display_width;
 174         os = s;
 175         while (*os) {
 176                 if (*os == '\n' || *os == '\r') {
 177                         /* If newline is the last character, save it
 178                          * until next call to avoid bumping up the
 179                          * display output.
 180                          */
 181                         if (*os == '\n' && !os[1]) {
 182                                 pending_newline = 1;
 183                                 current_line++;
 184                                 if (current_line > display_lines-1)
 185                                         current_line = display_lines-1;
 186                                 spin_unlock(&progress_lock);
 187                                 return;
 188                         }
 189
 190                         /* RTAS wants CR-LF, not just LF */
 191
 192                         if (*os == '\n') {
 193                                 rtas_call(display_character, 1, 1, NULL, '\r');
 194                                 rtas_call(display_character, 1, 1, NULL, '\n');
 195                         } else {
 196                                 /* CR might be used to re-draw a line, so we'll
 197                                  * leave it alone and not add LF.
 198                                  */
 199                                 rtas_call(display_character, 1, 1, NULL, *os);
 200                         }
 201
 202                         if (row_width)
 203                                 width = row_width[current_line];
 204                         else
 205                                 width = display_width;
 206                 } else {
 207                         width--;
 208                         rtas_call(display_character, 1, 1, NULL, *os);
 209                 }
 210
 211                 os++;
 212
 213                 /* if we overwrite the screen length */
 214                 if (width <= 0)
 215                         while ((*os != 0) && (*os != '\n') && (*os != '\r'))
 216                                 os++;
 217         }
 218
 219         spin_unlock(&progress_lock);
 220 }
 221 EXPORT_SYMBOL(rtas_progress);           /* needed by rtas_flash module */
 222
 223 int rtas_token(const char *service)
 224 {
 225         int *tokp;
 226         if (rtas.dev == NULL)
 227                 return RTAS_UNKNOWN_SERVICE;
 228         tokp = (int *) get_property(rtas.dev, service, NULL);
 229         return tokp ? *tokp : RTAS_UNKNOWN_SERVICE;
 230 }
 231
 232 #ifdef CONFIG_RTAS_ERROR_LOGGING
 233 /*
 234  * Return the firmware-specified size of the error log buffer
 235  *  for all rtas calls that require an error buffer argument.
 236  *  This includes 'check-exception' and 'rtas-last-error'.
 237  */
 238 int rtas_get_error_log_max(void)
 239 {
 240         static int rtas_error_log_max;
 241         if (rtas_error_log_max)
 242                 return rtas_error_log_max;
 243
 244         rtas_error_log_max = rtas_token ("rtas-error-log-max");
 245         if ((rtas_error_log_max == RTAS_UNKNOWN_SERVICE) ||
 246             (rtas_error_log_max > RTAS_ERROR_LOG_MAX)) {
 247                 printk (KERN_WARNING "RTAS: bad log buffer size %d\n",
 248                         rtas_error_log_max);
 249                 rtas_error_log_max = RTAS_ERROR_LOG_MAX;
 250         }
 251         return rtas_error_log_max;
 252 }
 253 EXPORT_SYMBOL(rtas_get_error_log_max);
 254
 255
 256 char rtas_err_buf[RTAS_ERROR_LOG_MAX];
 257 int rtas_last_error_token;
 258
 259 /** Return a copy of the detailed error text associated with the
 260  *  most recent failed call to rtas.  Because the error text
 261  *  might go stale if there are any other intervening rtas calls,
 262  *  this routine must be called atomically with whatever produced
 263  *  the error (i.e. with rtas.lock still held from the previous call).
 264  */
 265 static char *__fetch_rtas_last_error(char *altbuf)
 266 {
 267         struct rtas_args err_args, save_args;
 268         u32 bufsz;
 269         char *buf = NULL;
 270
 271         if (rtas_last_error_token == -1)
 272                 return NULL;
 273
 274         bufsz = rtas_get_error_log_max();
 275
 276         err_args.token = rtas_last_error_token;
 277         err_args.nargs = 2;
 278         err_args.nret = 1;
 279         err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf);
 280         err_args.args[1] = bufsz;
 281         err_args.args[2] = 0;
 282
 283         save_args = rtas.args;
 284         rtas.args = err_args;
 285
 286         enter_rtas(__pa(&rtas.args));
 287
 288         err_args = rtas.args;
 289         rtas.args = save_args;
 290
 291         /* Log the error in the unlikely case that there was one. */
 292         if (unlikely(err_args.args[2] == 0)) {
 293                 if (altbuf) {
 294                         buf = altbuf;
 295                 } else {
 296                         buf = rtas_err_buf;
 297                         if (mem_init_done)
 298                                 buf = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC);
 299                 }
 300                 if (buf)
 301                         memcpy(buf, rtas_err_buf, RTAS_ERROR_LOG_MAX);
 302         }
 303
 304         return buf;
 305 }
 306
 307 #define get_errorlog_buffer()   kmalloc(RTAS_ERROR_LOG_MAX, GFP_KERNEL)
 308
 309 #else /* CONFIG_RTAS_ERROR_LOGGING */
 310 #define __fetch_rtas_last_error(x)      NULL
 311 #define get_errorlog_buffer()           NULL
 312 #endif
 313
 314 int rtas_call(int token, int nargs, int nret, int *outputs, ...)
 315 {
 316         va_list list;
 317         int i;
 318         unsigned long s;
 319         struct rtas_args *rtas_args;
 320         char *buff_copy = NULL;
 321         int ret;
 322
 323         if (token == RTAS_UNKNOWN_SERVICE)
 324                 return -1;
 325
 326         /* Gotta do something different here, use global lock for now... */
 327         spin_lock_irqsave(&rtas.lock, s);
 328         rtas_args = &rtas.args;
 329
 330         rtas_args->token = token;
 331         rtas_args->nargs = nargs;
 332         rtas_args->nret  = nret;
 333         rtas_args->rets  = (rtas_arg_t *)&(rtas_args->args[nargs]);
 334         va_start(list, outputs);
 335         for (i = 0; i < nargs; ++i)
 336                 rtas_args->args[i] = va_arg(list, rtas_arg_t);
 337         va_end(list);
 338
 339         for (i = 0; i < nret; ++i)
 340                 rtas_args->rets[i] = 0;
 341
 342         enter_rtas(__pa(rtas_args));
 343
 344         /* A -1 return code indicates that the last command couldn't
 345            be completed due to a hardware error. */
 346         if (rtas_args->rets[0] == -1)
 347                 buff_copy = __fetch_rtas_last_error(NULL);
 348
 349         if (nret > 1 && outputs != NULL)
 350                 for (i = 0; i < nret-1; ++i)
 351                         outputs[i] = rtas_args->rets[i+1];
 352         ret = (nret > 0)? rtas_args->rets[0]: 0;
 353
 354         /* Gotta do something different here, use global lock for now... */
 355         spin_unlock_irqrestore(&rtas.lock, s);
 356
 357         if (buff_copy) {
 358                 log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0);
 359                 if (mem_init_done)
 360                         kfree(buff_copy);
 361         }
 362         return ret;
 363 }
 364
 365 /* Given an RTAS status code of 990n compute the hinted delay of 10^n
 366  * (last digit) milliseconds.  For now we bound at n=5 (100 sec).
 367  */
 368 unsigned int rtas_extended_busy_delay_time(int status)
 369 {
 370         int order = status - 9900;
 371         unsigned long ms;
 372
 373         if (order < 0)
 374                 order = 0;      /* RTC depends on this for -2 clock busy */
 375         else if (order > 5)
 376                 order = 5;      /* bound */
 377
 378         /* Use microseconds for reasonable accuracy */
 379         for (ms = 1; order > 0; order--)
 380                 ms *= 10;
 381
 382         return ms;
 383 }
 384
 385 int rtas_error_rc(int rtas_rc)
 386 {
 387         int rc;
 388
 389         switch (rtas_rc) {
 390                 case -1:                /* Hardware Error */
 391                         rc = -EIO;
 392                         break;
 393                 case -3:                /* Bad indicator/domain/etc */
 394                         rc = -EINVAL;
 395                         break;
 396                 case -9000:             /* Isolation error */
 397                         rc = -EFAULT;
 398                         break;
 399                 case -9001:             /* Outstanding TCE/PTE */
 400                         rc = -EEXIST;
 401                         break;
 402                 case -9002:             /* No usable slot */
 403                         rc = -ENODEV;
 404                         break;
 405                 default:
 406                         printk(KERN_ERR "%s: unexpected RTAS error %d\n",
 407                                         __FUNCTION__, rtas_rc);
 408                         rc = -ERANGE;
 409                         break;
 410         }
 411         return rc;
 412 }
 413
 414 int rtas_get_power_level(int powerdomain, int *level)
 415 {
 416         int token = rtas_token("get-power-level");
 417         int rc;
 418
 419         if (token == RTAS_UNKNOWN_SERVICE)
 420                 return -ENOENT;
 421
 422         while ((rc = rtas_call(token, 1, 2, level, powerdomain)) == RTAS_BUSY)
 423                 udelay(1);
 424
 425         if (rc < 0)
 426                 return rtas_error_rc(rc);
 427         return rc;
 428 }
 429
 430 int rtas_set_power_level(int powerdomain, int level, int *setlevel)
 431 {
 432         int token = rtas_token("set-power-level");
 433         unsigned int wait_time;
 434         int rc;
 435
 436         if (token == RTAS_UNKNOWN_SERVICE)
 437                 return -ENOENT;
 438
 439         while (1) {
 440                 rc = rtas_call(token, 2, 2, setlevel, powerdomain, level);
 441                 if (rc == RTAS_BUSY)
 442                         udelay(1);
 443                 else if (rtas_is_extended_busy(rc)) {
 444                         wait_time = rtas_extended_busy_delay_time(rc);
 445                         udelay(wait_time * 1000);
 446                 } else
 447                         break;
 448         }
 449
 450         if (rc < 0)
 451                 return rtas_error_rc(rc);
 452         return rc;
 453 }
 454
 455 int rtas_get_sensor(int sensor, int index, int *state)
 456 {
 457         int token = rtas_token("get-sensor-state");
 458         unsigned int wait_time;
 459         int rc;
 460
 461         if (token == RTAS_UNKNOWN_SERVICE)
 462                 return -ENOENT;
 463
 464         while (1) {
 465                 rc = rtas_call(token, 2, 2, state, sensor, index);
 466                 if (rc == RTAS_BUSY)
 467                         udelay(1);
 468                 else if (rtas_is_extended_busy(rc)) {
 469                         wait_time = rtas_extended_busy_delay_time(rc);
 470                         udelay(wait_time * 1000);
 471                 } else
 472                         break;
 473         }
 474
 475         if (rc < 0)
 476                 return rtas_error_rc(rc);
 477         return rc;
 478 }
 479
 480 int rtas_set_indicator(int indicator, int index, int new_value)
 481 {
 482         int token = rtas_token("set-indicator");
 483         unsigned int wait_time;
 484         int rc;
 485
 486         if (token == RTAS_UNKNOWN_SERVICE)
 487                 return -ENOENT;
 488
 489         while (1) {
 490                 rc = rtas_call(token, 3, 1, NULL, indicator, index, new_value);
 491                 if (rc == RTAS_BUSY)
 492                         udelay(1);
 493                 else if (rtas_is_extended_busy(rc)) {
 494                         wait_time = rtas_extended_busy_delay_time(rc);
 495                         udelay(wait_time * 1000);
 496                 }
 497                 else
 498                         break;
 499         }
 500
 501         if (rc < 0)
 502                 return rtas_error_rc(rc);
 503         return rc;
 504 }
 505
 506 void rtas_restart(char *cmd)
 507 {
 508         if (rtas_flash_term_hook)
 509                 rtas_flash_term_hook(SYS_RESTART);
 510         printk("RTAS system-reboot returned %d\n",
 511                rtas_call(rtas_token("system-reboot"), 0, 1, NULL));
 512         for (;;);
 513 }
 514
 515 void rtas_power_off(void)
 516 {
 517         if (rtas_flash_term_hook)
 518                 rtas_flash_term_hook(SYS_POWER_OFF);
 519         /* allow power on only with power button press */
 520         printk("RTAS power-off returned %d\n",
 521                rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
 522         for (;;);
 523 }
 524
 525 void rtas_halt(void)
 526 {
 527         if (rtas_flash_term_hook)
 528                 rtas_flash_term_hook(SYS_HALT);
 529         /* allow power on only with power button press */
 530         printk("RTAS power-off returned %d\n",
 531                rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
 532         for (;;);
 533 }
 534
 535 /* Must be in the RMO region, so we place it here */
 536 static char rtas_os_term_buf[2048];
 537
 538 void rtas_os_term(char *str)
 539 {
 540         int status;
 541
 542         if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term"))
 543                 return;
 544
 545         snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
 546
 547         do {
 548                 status = rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL,
 549                                    __pa(rtas_os_term_buf));
 550
 551                 if (status == RTAS_BUSY)
 552                         udelay(1);
 553                 else if (status != 0)
 554                         printk(KERN_EMERG "ibm,os-term call failed %d\n",
 555                                status);
 556         } while (status == RTAS_BUSY);
 557 }
 558
 559
 560 asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
 561 {
 562         struct rtas_args args;
 563         unsigned long flags;
 564         char *buff_copy, *errbuf = NULL;
 565         int nargs;
 566
 567         if (!capable(CAP_SYS_ADMIN))
 568                 return -EPERM;
 569
 570         if (copy_from_user(&args, uargs, 3 * sizeof(u32)) != 0)
 571                 return -EFAULT;
 572
 573         nargs = args.nargs;
 574         if (nargs > ARRAY_SIZE(args.args)
 575             || args.nret > ARRAY_SIZE(args.args)
 576             || nargs + args.nret > ARRAY_SIZE(args.args))
 577                 return -EINVAL;
 578
 579         /* Copy in args. */
 580         if (copy_from_user(args.args, uargs->args,
 581                            nargs * sizeof(rtas_arg_t)) != 0)
 582                 return -EFAULT;
 583
 584         buff_copy = get_errorlog_buffer();
 585
 586         spin_lock_irqsave(&rtas.lock, flags);
 587
 588         rtas.args = args;
 589         enter_rtas(__pa(&rtas.args));
 590         args = rtas.args;
 591
 592         args.rets = &args.args[nargs];
 593
 594         /* A -1 return code indicates that the last command couldn't
 595            be completed due to a hardware error. */
 596         if (args.rets[0] == -1)
 597                 errbuf = __fetch_rtas_last_error(buff_copy);
 598
 599         spin_unlock_irqrestore(&rtas.lock, flags);
 600
 601         if (buff_copy) {
 602                 if (errbuf)
 603                         log_error(errbuf, ERR_TYPE_RTAS_LOG, 0);
 604                 kfree(buff_copy);
 605         }
 606
 607         /* Copy out args. */
 608         if (copy_to_user(uargs->args + nargs,
 609                          args.args + nargs,
 610                          args.nret * sizeof(rtas_arg_t)) != 0)
 611                 return -EFAULT;
 612
 613         return 0;
 614 }
 615
 616 /* This version can't take the spinlock, because it never returns */
 617
 618 struct rtas_args rtas_stop_self_args = {
 619         /* The token is initialized for real in setup_system() */
 620         .token = RTAS_UNKNOWN_SERVICE,
 621         .nargs = 0,
 622         .nret = 1,
 623         .rets = &rtas_stop_self_args.args[0],
 624 };
 625
 626 void rtas_stop_self(void)
 627 {
 628         struct rtas_args *rtas_args = &rtas_stop_self_args;
 629
 630         local_irq_disable();
 631
 632         BUG_ON(rtas_args->token == RTAS_UNKNOWN_SERVICE);
 633
 634         printk("cpu %u (hwid %u) Ready to die...\n",
 635                smp_processor_id(), hard_smp_processor_id());
 636         enter_rtas(__pa(rtas_args));
 637
 638         panic("Alas, I survived.\n");
 639 }
 640
 641 /*
 642  * Call early during boot, before mem init or bootmem, to retrieve the RTAS
 643  * informations from the device-tree and allocate the RMO buffer for userland
 644  * accesses.
 645  */
 646 void __init rtas_initialize(void)
 647 {
 648         unsigned long rtas_region = RTAS_INSTANTIATE_MAX;
 649
 650         /* Get RTAS dev node and fill up our "rtas" structure with infos
 651          * about it.
 652          */
 653         rtas.dev = of_find_node_by_name(NULL, "rtas");
 654         if (rtas.dev) {
 655                 u32 *basep, *entryp;
 656                 u32 *sizep;
 657
 658                 basep = (u32 *)get_property(rtas.dev, "linux,rtas-base", NULL);
 659                 sizep = (u32 *)get_property(rtas.dev, "rtas-size", NULL);
 660                 if (basep != NULL && sizep != NULL) {
 661                         rtas.base = *basep;
 662                         rtas.size = *sizep;
 663                         entryp = (u32 *)get_property(rtas.dev, "linux,rtas-entry", NULL);
 664                         if (entryp == NULL) /* Ugh */
 665                                 rtas.entry = rtas.base;
 666                         else
 667                                 rtas.entry = *entryp;
 668                 } else
 669                         rtas.dev = NULL;
 670         }
 671         if (!rtas.dev)
 672                 return;
 673
 674         /* If RTAS was found, allocate the RMO buffer for it and look for
 675          * the stop-self token if any
 676          */
 677 #ifdef CONFIG_PPC64
 678         if (_machine == PLATFORM_PSERIES_LPAR)
 679                 rtas_region = min(lmb.rmo_size, RTAS_INSTANTIATE_MAX);
 680 #endif
 681         rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE, rtas_region);
 682
 683 #ifdef CONFIG_HOTPLUG_CPU
 684         rtas_stop_self_args.token = rtas_token("stop-self");
 685 #endif /* CONFIG_HOTPLUG_CPU */
 686 #ifdef CONFIG_RTAS_ERROR_LOGGING
 687         rtas_last_error_token = rtas_token("rtas-last-error");
 688 #endif
 689 }
 690
 691
 692 EXPORT_SYMBOL(rtas_token);
 693 EXPORT_SYMBOL(rtas_call);
 694 EXPORT_SYMBOL(rtas_data_buf);
 695 EXPORT_SYMBOL(rtas_data_buf_lock);
 696 EXPORT_SYMBOL(rtas_extended_busy_delay_time);
 697 EXPORT_SYMBOL(rtas_get_sensor);
 698 EXPORT_SYMBOL(rtas_get_power_level);
 699 EXPORT_SYMBOL(rtas_set_power_level);
 700 EXPORT_SYMBOL(rtas_set_indicator);