drivers/acpi/acpica/utdebug.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utdebug - Debug print routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <linux/export.h>
  45 #include <acpi/acpi.h>
  46 #include "accommon.h"
  47
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utdebug")
  50
  51 #ifdef ACPI_DEBUG_OUTPUT
  52 static acpi_thread_id acpi_gbl_prev_thread_id = (acpi_thread_id) 0xFFFFFFFF;
  53 static char *acpi_gbl_fn_entry_str = "----Entry";
  54 static char *acpi_gbl_fn_exit_str = "----Exit-";
  55
  56 /* Local prototypes */
  57
  58 static const char *acpi_ut_trim_function_name(const char *function_name);
  59
  60 /*******************************************************************************
  61  *
  62  * FUNCTION:    acpi_ut_init_stack_ptr_trace
  63  *
  64  * PARAMETERS:  None
  65  *
  66  * RETURN:      None
  67  *
  68  * DESCRIPTION: Save the current CPU stack pointer at subsystem startup
  69  *
  70  ******************************************************************************/
  71
  72 void acpi_ut_init_stack_ptr_trace(void)
  73 {
  74         acpi_size current_sp;
  75
  76         acpi_gbl_entry_stack_pointer = &current_sp;
  77 }
  78
  79 /*******************************************************************************
  80  *
  81  * FUNCTION:    acpi_ut_track_stack_ptr
  82  *
  83  * PARAMETERS:  None
  84  *
  85  * RETURN:      None
  86  *
  87  * DESCRIPTION: Save the current CPU stack pointer
  88  *
  89  ******************************************************************************/
  90
  91 void acpi_ut_track_stack_ptr(void)
  92 {
  93         acpi_size current_sp;
  94
  95         if (&current_sp < acpi_gbl_lowest_stack_pointer) {
  96                 acpi_gbl_lowest_stack_pointer = &current_sp;
  97         }
  98
  99         if (acpi_gbl_nesting_level > acpi_gbl_deepest_nesting) {
 100                 acpi_gbl_deepest_nesting = acpi_gbl_nesting_level;
 101         }
 102 }
 103
 104 /*******************************************************************************
 105  *
 106  * FUNCTION:    acpi_ut_trim_function_name
 107  *
 108  * PARAMETERS:  function_name       - Ascii string containing a procedure name
 109  *
 110  * RETURN:      Updated pointer to the function name
 111  *
 112  * DESCRIPTION: Remove the "Acpi" prefix from the function name, if present.
 113  *              This allows compiler macros such as __FUNCTION__ to be used
 114  *              with no change to the debug output.
 115  *
 116  ******************************************************************************/
 117
 118 static const char *acpi_ut_trim_function_name(const char *function_name)
 119 {
 120
 121         /* All Function names are longer than 4 chars, check is safe */
 122
 123         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_MIXED) {
 124
 125                 /* This is the case where the original source has not been modified */
 126
 127                 return (function_name + 4);
 128         }
 129
 130         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_LOWER) {
 131
 132                 /* This is the case where the source has been 'linuxized' */
 133
 134                 return (function_name + 5);
 135         }
 136
 137         return (function_name);
 138 }
 139
 140 /*******************************************************************************
 141  *
 142  * FUNCTION:    acpi_debug_print
 143  *
 144  * PARAMETERS:  requested_debug_level - Requested debug print level
 145  *              line_number         - Caller's line number (for error output)
 146  *              function_name       - Caller's procedure name
 147  *              module_name         - Caller's module name
 148  *              component_id        - Caller's component ID
 149  *              format              - Printf format field
 150  *              ...                 - Optional printf arguments
 151  *
 152  * RETURN:      None
 153  *
 154  * DESCRIPTION: Print error message with prefix consisting of the module name,
 155  *              line number, and component ID.
 156  *
 157  ******************************************************************************/
 158
 159 void ACPI_INTERNAL_VAR_XFACE
 160 acpi_debug_print(u32 requested_debug_level,
 161                  u32 line_number,
 162                  const char *function_name,
 163                  const char *module_name,
 164                  u32 component_id, const char *format, ...)
 165 {
 166         acpi_thread_id thread_id;
 167         va_list args;
 168
 169         /* Check if debug output enabled */
 170
 171         if (!ACPI_IS_DEBUG_ENABLED(requested_debug_level, component_id)) {
 172                 return;
 173         }
 174
 175         /*
 176          * Thread tracking and context switch notification
 177          */
 178         thread_id = acpi_os_get_thread_id();
 179         if (thread_id != acpi_gbl_prev_thread_id) {
 180                 if (ACPI_LV_THREADS & acpi_dbg_level) {
 181                         acpi_os_printf
 182                             ("\n**** Context Switch from TID %u to TID %u ****\n\n",
 183                              (u32)acpi_gbl_prev_thread_id, (u32)thread_id);
 184                 }
 185
 186                 acpi_gbl_prev_thread_id = thread_id;
 187         }
 188
 189         /*
 190          * Display the module name, current line number, thread ID (if requested),
 191          * current procedure nesting level, and the current procedure name
 192          */
 193         acpi_os_printf("%8s-%04ld ", module_name, line_number);
 194
 195         if (ACPI_LV_THREADS & acpi_dbg_level) {
 196                 acpi_os_printf("[%u] ", (u32)thread_id);
 197         }
 198
 199         acpi_os_printf("[%02ld] %-22.22s: ",
 200                        acpi_gbl_nesting_level,
 201                        acpi_ut_trim_function_name(function_name));
 202
 203         va_start(args, format);
 204         acpi_os_vprintf(format, args);
 205         va_end(args);
 206 }
 207
 208 ACPI_EXPORT_SYMBOL(acpi_debug_print)
 209
 210 /*******************************************************************************
 211  *
 212  * FUNCTION:    acpi_debug_print_raw
 213  *
 214  * PARAMETERS:  requested_debug_level - Requested debug print level
 215  *              line_number         - Caller's line number
 216  *              function_name       - Caller's procedure name
 217  *              module_name         - Caller's module name
 218  *              component_id        - Caller's component ID
 219  *              format              - Printf format field
 220  *              ...                 - Optional printf arguments
 221  *
 222  * RETURN:      None
 223  *
 224  * DESCRIPTION: Print message with no headers. Has same interface as
 225  *              debug_print so that the same macros can be used.
 226  *
 227  ******************************************************************************/
 228 void ACPI_INTERNAL_VAR_XFACE
 229 acpi_debug_print_raw(u32 requested_debug_level,
 230                      u32 line_number,
 231                      const char *function_name,
 232                      const char *module_name,
 233                      u32 component_id, const char *format, ...)
 234 {
 235         va_list args;
 236
 237         /* Check if debug output enabled */
 238
 239         if (!ACPI_IS_DEBUG_ENABLED(requested_debug_level, component_id)) {
 240                 return;
 241         }
 242
 243         va_start(args, format);
 244         acpi_os_vprintf(format, args);
 245         va_end(args);
 246 }
 247
 248 ACPI_EXPORT_SYMBOL(acpi_debug_print_raw)
 249
 250 /*******************************************************************************
 251  *
 252  * FUNCTION:    acpi_ut_trace
 253  *
 254  * PARAMETERS:  line_number         - Caller's line number
 255  *              function_name       - Caller's procedure name
 256  *              module_name         - Caller's module name
 257  *              component_id        - Caller's component ID
 258  *
 259  * RETURN:      None
 260  *
 261  * DESCRIPTION: Function entry trace. Prints only if TRACE_FUNCTIONS bit is
 262  *              set in debug_level
 263  *
 264  ******************************************************************************/
 265 void
 266 acpi_ut_trace(u32 line_number,
 267               const char *function_name,
 268               const char *module_name, u32 component_id)
 269 {
 270
 271         acpi_gbl_nesting_level++;
 272         acpi_ut_track_stack_ptr();
 273
 274         /* Check if enabled up-front for performance */
 275
 276         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 277                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 278                                  line_number, function_name, module_name,
 279                                  component_id, "%s\n", acpi_gbl_fn_entry_str);
 280         }
 281 }
 282
 283 ACPI_EXPORT_SYMBOL(acpi_ut_trace)
 284
 285 /*******************************************************************************
 286  *
 287  * FUNCTION:    acpi_ut_trace_ptr
 288  *
 289  * PARAMETERS:  line_number         - Caller's line number
 290  *              function_name       - Caller's procedure name
 291  *              module_name         - Caller's module name
 292  *              component_id        - Caller's component ID
 293  *              pointer             - Pointer to display
 294  *
 295  * RETURN:      None
 296  *
 297  * DESCRIPTION: Function entry trace. Prints only if TRACE_FUNCTIONS bit is
 298  *              set in debug_level
 299  *
 300  ******************************************************************************/
 301 void
 302 acpi_ut_trace_ptr(u32 line_number,
 303                   const char *function_name,
 304                   const char *module_name, u32 component_id, void *pointer)
 305 {
 306
 307         acpi_gbl_nesting_level++;
 308         acpi_ut_track_stack_ptr();
 309
 310         /* Check if enabled up-front for performance */
 311
 312         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 313                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 314                                  line_number, function_name, module_name,
 315                                  component_id, "%s %p\n", acpi_gbl_fn_entry_str,
 316                                  pointer);
 317         }
 318 }
 319
 320 /*******************************************************************************
 321  *
 322  * FUNCTION:    acpi_ut_trace_str
 323  *
 324  * PARAMETERS:  line_number         - Caller's line number
 325  *              function_name       - Caller's procedure name
 326  *              module_name         - Caller's module name
 327  *              component_id        - Caller's component ID
 328  *              string              - Additional string to display
 329  *
 330  * RETURN:      None
 331  *
 332  * DESCRIPTION: Function entry trace. Prints only if TRACE_FUNCTIONS bit is
 333  *              set in debug_level
 334  *
 335  ******************************************************************************/
 336
 337 void
 338 acpi_ut_trace_str(u32 line_number,
 339                   const char *function_name,
 340                   const char *module_name, u32 component_id, char *string)
 341 {
 342
 343         acpi_gbl_nesting_level++;
 344         acpi_ut_track_stack_ptr();
 345
 346         /* Check if enabled up-front for performance */
 347
 348         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 349                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 350                                  line_number, function_name, module_name,
 351                                  component_id, "%s %s\n", acpi_gbl_fn_entry_str,
 352                                  string);
 353         }
 354 }
 355
 356 /*******************************************************************************
 357  *
 358  * FUNCTION:    acpi_ut_trace_u32
 359  *
 360  * PARAMETERS:  line_number         - Caller's line number
 361  *              function_name       - Caller's procedure name
 362  *              module_name         - Caller's module name
 363  *              component_id        - Caller's component ID
 364  *              integer             - Integer to display
 365  *
 366  * RETURN:      None
 367  *
 368  * DESCRIPTION: Function entry trace. Prints only if TRACE_FUNCTIONS bit is
 369  *              set in debug_level
 370  *
 371  ******************************************************************************/
 372
 373 void
 374 acpi_ut_trace_u32(u32 line_number,
 375                   const char *function_name,
 376                   const char *module_name, u32 component_id, u32 integer)
 377 {
 378
 379         acpi_gbl_nesting_level++;
 380         acpi_ut_track_stack_ptr();
 381
 382         /* Check if enabled up-front for performance */
 383
 384         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 385                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 386                                  line_number, function_name, module_name,
 387                                  component_id, "%s %08X\n",
 388                                  acpi_gbl_fn_entry_str, integer);
 389         }
 390 }
 391
 392 /*******************************************************************************
 393  *
 394  * FUNCTION:    acpi_ut_exit
 395  *
 396  * PARAMETERS:  line_number         - Caller's line number
 397  *              function_name       - Caller's procedure name
 398  *              module_name         - Caller's module name
 399  *              component_id        - Caller's component ID
 400  *
 401  * RETURN:      None
 402  *
 403  * DESCRIPTION: Function exit trace. Prints only if TRACE_FUNCTIONS bit is
 404  *              set in debug_level
 405  *
 406  ******************************************************************************/
 407
 408 void
 409 acpi_ut_exit(u32 line_number,
 410              const char *function_name,
 411              const char *module_name, u32 component_id)
 412 {
 413
 414         /* Check if enabled up-front for performance */
 415
 416         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 417                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 418                                  line_number, function_name, module_name,
 419                                  component_id, "%s\n", acpi_gbl_fn_exit_str);
 420         }
 421
 422         acpi_gbl_nesting_level--;
 423 }
 424
 425 ACPI_EXPORT_SYMBOL(acpi_ut_exit)
 426
 427 /*******************************************************************************
 428  *
 429  * FUNCTION:    acpi_ut_status_exit
 430  *
 431  * PARAMETERS:  line_number         - Caller's line number
 432  *              function_name       - Caller's procedure name
 433  *              module_name         - Caller's module name
 434  *              component_id        - Caller's component ID
 435  *              status              - Exit status code
 436  *
 437  * RETURN:      None
 438  *
 439  * DESCRIPTION: Function exit trace. Prints only if TRACE_FUNCTIONS bit is
 440  *              set in debug_level. Prints exit status also.
 441  *
 442  ******************************************************************************/
 443 void
 444 acpi_ut_status_exit(u32 line_number,
 445                     const char *function_name,
 446                     const char *module_name,
 447                     u32 component_id, acpi_status status)
 448 {
 449
 450         /* Check if enabled up-front for performance */
 451
 452         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 453                 if (ACPI_SUCCESS(status)) {
 454                         acpi_debug_print(ACPI_LV_FUNCTIONS,
 455                                          line_number, function_name,
 456                                          module_name, component_id, "%s %s\n",
 457                                          acpi_gbl_fn_exit_str,
 458                                          acpi_format_exception(status));
 459                 } else {
 460                         acpi_debug_print(ACPI_LV_FUNCTIONS,
 461                                          line_number, function_name,
 462                                          module_name, component_id,
 463                                          "%s ****Exception****: %s\n",
 464                                          acpi_gbl_fn_exit_str,
 465                                          acpi_format_exception(status));
 466                 }
 467         }
 468
 469         acpi_gbl_nesting_level--;
 470 }
 471
 472 ACPI_EXPORT_SYMBOL(acpi_ut_status_exit)
 473
 474 /*******************************************************************************
 475  *
 476  * FUNCTION:    acpi_ut_value_exit
 477  *
 478  * PARAMETERS:  line_number         - Caller's line number
 479  *              function_name       - Caller's procedure name
 480  *              module_name         - Caller's module name
 481  *              component_id        - Caller's component ID
 482  *              value               - Value to be printed with exit msg
 483  *
 484  * RETURN:      None
 485  *
 486  * DESCRIPTION: Function exit trace. Prints only if TRACE_FUNCTIONS bit is
 487  *              set in debug_level. Prints exit value also.
 488  *
 489  ******************************************************************************/
 490 void
 491 acpi_ut_value_exit(u32 line_number,
 492                    const char *function_name,
 493                    const char *module_name, u32 component_id, u64 value)
 494 {
 495
 496         /* Check if enabled up-front for performance */
 497
 498         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 499                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 500                                  line_number, function_name, module_name,
 501                                  component_id, "%s %8.8X%8.8X\n",
 502                                  acpi_gbl_fn_exit_str,
 503                                  ACPI_FORMAT_UINT64(value));
 504         }
 505
 506         acpi_gbl_nesting_level--;
 507 }
 508
 509 ACPI_EXPORT_SYMBOL(acpi_ut_value_exit)
 510
 511 /*******************************************************************************
 512  *
 513  * FUNCTION:    acpi_ut_ptr_exit
 514  *
 515  * PARAMETERS:  line_number         - Caller's line number
 516  *              function_name       - Caller's procedure name
 517  *              module_name         - Caller's module name
 518  *              component_id        - Caller's component ID
 519  *              ptr                 - Pointer to display
 520  *
 521  * RETURN:      None
 522  *
 523  * DESCRIPTION: Function exit trace. Prints only if TRACE_FUNCTIONS bit is
 524  *              set in debug_level. Prints exit value also.
 525  *
 526  ******************************************************************************/
 527 void
 528 acpi_ut_ptr_exit(u32 line_number,
 529                  const char *function_name,
 530                  const char *module_name, u32 component_id, u8 *ptr)
 531 {
 532
 533         /* Check if enabled up-front for performance */
 534
 535         if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_FUNCTIONS, component_id)) {
 536                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 537                                  line_number, function_name, module_name,
 538                                  component_id, "%s %p\n", acpi_gbl_fn_exit_str,
 539                                  ptr);
 540         }
 541
 542         acpi_gbl_nesting_level--;
 543 }
 544
 545 #endif
 546
 547 /*******************************************************************************
 548  *
 549  * FUNCTION:    acpi_ut_dump_buffer
 550  *
 551  * PARAMETERS:  buffer              - Buffer to dump
 552  *              count               - Amount to dump, in bytes
 553  *              display             - BYTE, WORD, DWORD, or QWORD display
 554  *              offset              - Beginning buffer offset (display only)
 555  *
 556  * RETURN:      None
 557  *
 558  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 559  *
 560  ******************************************************************************/
 561
 562 void acpi_ut_dump_buffer(u8 *buffer, u32 count, u32 display, u32 base_offset)
 563 {
 564         u32 i = 0;
 565         u32 j;
 566         u32 temp32;
 567         u8 buf_char;
 568
 569         if (!buffer) {
 570                 acpi_os_printf("Null Buffer Pointer in DumpBuffer!\n");
 571                 return;
 572         }
 573
 574         if ((count < 4) || (count & 0x01)) {
 575                 display = DB_BYTE_DISPLAY;
 576         }
 577
 578         /* Nasty little dump buffer routine! */
 579
 580         while (i < count) {
 581
 582                 /* Print current offset */
 583
 584                 acpi_os_printf("%6.4X: ", (base_offset + i));
 585
 586                 /* Print 16 hex chars */
 587
 588                 for (j = 0; j < 16;) {
 589                         if (i + j >= count) {
 590
 591                                 /* Dump fill spaces */
 592
 593                                 acpi_os_printf("%*s", ((display * 2) + 1), " ");
 594                                 j += display;
 595                                 continue;
 596                         }
 597
 598                         switch (display) {
 599                         case DB_BYTE_DISPLAY:
 600                         default:        /* Default is BYTE display */
 601
 602                                 acpi_os_printf("%02X ",
 603                                                buffer[(acpi_size) i + j]);
 604                                 break;
 605
 606                         case DB_WORD_DISPLAY:
 607
 608                                 ACPI_MOVE_16_TO_32(&temp32,
 609                                                    &buffer[(acpi_size) i + j]);
 610                                 acpi_os_printf("%04X ", temp32);
 611                                 break;
 612
 613                         case DB_DWORD_DISPLAY:
 614
 615                                 ACPI_MOVE_32_TO_32(&temp32,
 616                                                    &buffer[(acpi_size) i + j]);
 617                                 acpi_os_printf("%08X ", temp32);
 618                                 break;
 619
 620                         case DB_QWORD_DISPLAY:
 621
 622                                 ACPI_MOVE_32_TO_32(&temp32,
 623                                                    &buffer[(acpi_size) i + j]);
 624                                 acpi_os_printf("%08X", temp32);
 625
 626                                 ACPI_MOVE_32_TO_32(&temp32,
 627                                                    &buffer[(acpi_size) i + j +
 628                                                            4]);
 629                                 acpi_os_printf("%08X ", temp32);
 630                                 break;
 631                         }
 632
 633                         j += display;
 634                 }
 635
 636                 /*
 637                  * Print the ASCII equivalent characters but watch out for the bad
 638                  * unprintable ones (printable chars are 0x20 through 0x7E)
 639                  */
 640                 acpi_os_printf(" ");
 641                 for (j = 0; j < 16; j++) {
 642                         if (i + j >= count) {
 643                                 acpi_os_printf("\n");
 644                                 return;
 645                         }
 646
 647                         buf_char = buffer[(acpi_size) i + j];
 648                         if (ACPI_IS_PRINT(buf_char)) {
 649                                 acpi_os_printf("%c", buf_char);
 650                         } else {
 651                                 acpi_os_printf(".");
 652                         }
 653                 }
 654
 655                 /* Done with that line. */
 656
 657                 acpi_os_printf("\n");
 658                 i += 16;
 659         }
 660
 661         return;
 662 }
 663
 664 /*******************************************************************************
 665  *
 666  * FUNCTION:    acpi_ut_debug_dump_buffer
 667  *
 668  * PARAMETERS:  buffer              - Buffer to dump
 669  *              count               - Amount to dump, in bytes
 670  *              display             - BYTE, WORD, DWORD, or QWORD display
 671  *              component_ID        - Caller's component ID
 672  *
 673  * RETURN:      None
 674  *
 675  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 676  *
 677  ******************************************************************************/
 678
 679 void
 680 acpi_ut_debug_dump_buffer(u8 *buffer, u32 count, u32 display, u32 component_id)
 681 {
 682
 683         /* Only dump the buffer if tracing is enabled */
 684
 685         if (!((ACPI_LV_TABLES & acpi_dbg_level) &&
 686               (component_id & acpi_dbg_layer))) {
 687                 return;
 688         }
 689
 690         acpi_ut_dump_buffer(buffer, count, display, 0);
 691 }