1 /*****************************************************************************\
3 *****************************************************************************
4 * Copyright (C) 2002-2005 The Regents of the University of California.
5 * Produced at the Lawrence Livermore National Laboratory.
6 * Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
10 * This file is part of nvramtool, a utility for reading/writing coreboot
11 * parameters and displaying information from the coreboot table.
12 * For details, see http://coreboot.org/nvramtool.
14 * Please also read the file DISCLAIMER which is included in this software
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License (as published by the
19 * Free Software Foundation) version 2, dated June 1991.
21 * This program is distributed in the hope that it will be useful, but
22 * WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
24 * conditions of the GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License along
27 * with this program; if not, write to the Free Software Foundation, Inc.,
28 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
29 \*****************************************************************************/
32 #include "layout_file.h"
34 #include "cmos_lowlevel.h"
37 static void process_layout_file(FILE * f);
38 static void skip_past_start(FILE * f);
39 static int process_entry(FILE * f, int skip_add);
40 static int process_enum(FILE * f, int skip_add);
41 static void process_checksum_info(FILE * f);
42 static void skip_remaining_lines(FILE * f);
43 static void create_entry(cmos_entry_t * cmos_entry,
44 const char start_bit_str[], const char length_str[],
45 const char config_str[], const char config_id_str[],
46 const char name_str[]);
47 static void try_add_layout_file_entry(const cmos_entry_t * cmos_entry);
48 static void create_enum(cmos_enum_t * cmos_enum, const char id_str[],
49 const char value_str[], const char text_str[]);
50 static void try_add_cmos_enum(const cmos_enum_t * cmos_enum);
51 static void set_checksum_info(const char start_str[], const char end_str[],
52 const char index_str[]);
53 static char cmos_entry_char_value(cmos_entry_config_t config);
54 static int get_layout_file_line(FILE * f, char line[], int line_buf_size);
55 static unsigned string_to_unsigned(const char str[], const char str_name[]);
56 static unsigned long string_to_unsigned_long(const char str[],
57 const char str_name[]);
58 static unsigned long do_string_to_unsigned_long(const char str[],
59 const char str_name[],
62 /* matches either a blank line or a comment line */
63 static const char blank_or_comment_regex[] =
65 "(^[[:space:]]+$)" "|" /* or ... */
66 /* a line consisting of: optional whitespace followed by */
68 /* a '#' character and optionally, additional characters */
71 static regex_t blank_or_comment_expr;
73 /* matches the line in a CMOS layout file indicating the start of the
76 static const char start_entries_regex[] =
77 /* optional whitespace */
79 /* followed by "entries" */
81 /* followed by optional whitespace */
84 static regex_t start_entries_expr;
86 /* matches the line in a CMOS layout file indicating the start of the
87 * "enumerations" section
89 static const char start_enums_regex[] =
90 /* optional whitespace */
92 /* followed by "enumerations" */
94 /* followed by optional whitespace */
97 static regex_t start_enums_expr;
99 /* matches the line in a CMOS layout file indicating the start of the
100 * "checksums" section
102 static const char start_checksums_regex[] =
103 /* optional whitespace */
105 /* followed by "checksums" */
107 /* followed by optional whitespace */
110 static regex_t start_checksums_expr;
112 /* matches a line in a CMOS layout file specifying a CMOS entry */
113 static const char entries_line_regex[] =
114 /* optional whitespace */
116 /* followed by a chunk of nonwhitespace for start-bit field */
118 /* followed by one or more whitespace characters */
120 /* followed by a chunk of nonwhitespace for length field */
122 /* followed by one or more whitespace characters */
124 /* followed by a chunk of nonwhitespace for config field */
126 /* followed by one or more whitespace characters */
128 /* followed by a chunk of nonwhitespace for config-ID field */
130 /* followed by one or more whitespace characters */
132 /* followed by a chunk of nonwhitespace for name field */
134 /* followed by optional whitespace */
137 static regex_t entries_line_expr;
139 /* matches a line in a CMOS layout file specifying a CMOS enumeration */
140 static const char enums_line_regex[] =
141 /* optional whitespace */
143 /* followed by a chunk of nonwhitespace for ID field */
145 /* followed by one or more whitespace characters */
147 /* followed by a chunk of nonwhitespace for value field */
149 /* followed by one or more whitespace characters */
151 /* followed by a chunk of nonwhitespace for text field */
153 /* followed by optional whitespace */
156 static regex_t enums_line_expr;
158 /* matches the line in a CMOS layout file specifying CMOS checksum
161 static const char checksum_line_regex[] =
162 /* optional whitespace */
164 /* followed by "checksum" */
166 /* followed by one or more whitespace characters */
168 /* followed by a chunk of nonwhitespace for first bit of summed area */
170 /* followed by one or more whitespace characters */
172 /* followed by a chunk of nonwhitespace for last bit of summed area */
174 /* followed by one or more whitespace characters */
176 /* followed by a chunk of nonwhitespace for checksum location bit */
178 /* followed by optional whitespace */
181 static regex_t checksum_line_expr;
183 static const int LINE_BUF_SIZE = 256;
187 static const char *layout_filename = NULL;
189 /****************************************************************************
190 * set_layout_filename
192 * Set the name of the file we will obtain CMOS layout information from.
193 ****************************************************************************/
194 void set_layout_filename(const char filename[])
196 layout_filename = filename;
199 /****************************************************************************
200 * get_layout_from_file
202 * Read CMOS layout information from the user-specified CMOS layout file.
203 ****************************************************************************/
204 void get_layout_from_file(void)
208 assert(layout_filename != NULL);
210 if ((f = fopen(layout_filename, "r")) == NULL) {
212 "%s: Can not open CMOS layout file %s for reading: "
213 "%s\n", prog_name, layout_filename, strerror(errno));
217 process_layout_file(f);
221 /****************************************************************************
224 * Write CMOS layout information to file 'f'. The output is written in the
225 * format that CMOS layout files adhere to.
226 ****************************************************************************/
227 void write_cmos_layout(FILE * f)
229 const cmos_entry_t *cmos_entry;
230 const cmos_enum_t *cmos_enum;
231 cmos_checksum_layout_t layout;
233 fprintf(f, "entries\n");
235 for (cmos_entry = first_cmos_entry();
236 cmos_entry != NULL; cmos_entry = next_cmos_entry(cmos_entry))
237 fprintf(f, "%u %u %c %u %s\n", cmos_entry->bit,
239 cmos_entry_char_value(cmos_entry->config),
240 cmos_entry->config_id, cmos_entry->name);
242 fprintf(f, "\nenumerations\n");
244 for (cmos_enum = first_cmos_enum();
245 cmos_enum != NULL; cmos_enum = next_cmos_enum(cmos_enum))
246 fprintf(f, "%u %llu %s\n", cmos_enum->config_id,
247 cmos_enum->value, cmos_enum->text);
249 layout.summed_area_start = cmos_checksum_start;
250 layout.summed_area_end = cmos_checksum_end;
251 layout.checksum_at = cmos_checksum_index;
252 checksum_layout_to_bits(&layout);
253 fprintf(f, "\nchecksums\nchecksum %u %u %u\n", layout.summed_area_start,
254 layout.summed_area_end, layout.checksum_at);
257 /****************************************************************************
258 * process_layout_file
260 * Read CMOS layout information from file 'f' and add it to our internal
262 ****************************************************************************/
263 static void process_layout_file(FILE * f)
265 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, blank_or_comment_regex, &blank_or_comment_expr);
266 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, start_entries_regex, &start_entries_expr);
267 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, entries_line_regex, &entries_line_expr);
268 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, start_enums_regex, &start_enums_expr);
269 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, enums_line_regex, &enums_line_expr);
270 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, start_checksums_regex, &start_checksums_expr);
271 compile_reg_expr(REG_EXTENDED | REG_NEWLINE, checksum_line_regex, &checksum_line_expr);
275 /* Skip past all entries. We will process these later when we
276 * make a second pass through the file.
278 while (!process_entry(f, 1)) ;
280 /* Process all enums, adding them to our internal repository as
283 if (process_enum(f, 0)) {
284 fprintf(stderr, "%s: Error: CMOS layout file contains no "
285 "enumerations.\n", prog_name);
289 while (!process_enum(f, 0)) ;
291 /* Go back to start of file. */
293 fseek(f, 0, SEEK_SET);
297 /* Process all entries, adding them to the repository as we go.
298 * We must add the entries after the enums, even though they
299 * appear in the layout file before the enums. This is because
300 * the entries are sanity checked against the enums as they are
304 if (process_entry(f, 0)) {
306 "%s: Error: CMOS layout file contains no entries.\n",
311 while (!process_entry(f, 0)) ;
313 /* Skip past all enums. They have already been processed. */
314 while (!process_enum(f, 1)) ;
316 /* Process CMOS checksum info. */
317 process_checksum_info(f);
319 /* See if there are any lines left to process. If so, verify
320 * that they are all either blank lines or comments.
322 skip_remaining_lines(f);
324 regfree(&blank_or_comment_expr);
325 regfree(&start_entries_expr);
326 regfree(&entries_line_expr);
327 regfree(&start_enums_expr);
328 regfree(&enums_line_expr);
329 regfree(&start_checksums_expr);
330 regfree(&checksum_line_expr);
333 /****************************************************************************
336 * Skip past the line that marks the start of the "entries" section.
337 ****************************************************************************/
338 static void skip_past_start(FILE * f)
340 char line[LINE_BUF_SIZE];
342 for (;; line_num++) {
343 if (get_layout_file_line(f, line, LINE_BUF_SIZE)) {
345 "%s: \"entries\" line not found in CMOS layout file.\n",
350 if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
353 if (!regexec(&start_entries_expr, line, 0, NULL, 0))
357 "%s: Syntax error on line %d of CMOS layout file. "
358 "\"entries\" line expected.\n", prog_name, line_num);
365 /****************************************************************************
368 * Get an entry from "entries" section of file and add it to our repository
369 * of layout information. Return 0 if an entry was found and processed.
370 * Return 1 if there are no more entries.
371 ****************************************************************************/
372 static int process_entry(FILE * f, int skip_add)
374 static const size_t N_MATCHES = 6;
375 char line[LINE_BUF_SIZE];
376 regmatch_t match[N_MATCHES];
377 cmos_entry_t cmos_entry;
382 for (;; line_num++) {
383 if (get_layout_file_line(f, line, LINE_BUF_SIZE)) {
385 "%s: Unexpected end of CMOS layout file reached while "
386 "reading \"entries\" section.\n", prog_name);
390 if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
393 if (regexec(&entries_line_expr, line, N_MATCHES, match, 0)) {
394 if (regexec(&start_enums_expr, line, 0, NULL, 0)) {
396 "%s: Syntax error on line %d of CMOS layout "
397 "file.\n", prog_name, line_num);
401 break; /* start of enumerations reached: no more entries */
404 result = 0; /* next layout entry found */
409 line[match[1].rm_eo] = '\0';
410 line[match[2].rm_eo] = '\0';
411 line[match[3].rm_eo] = '\0';
412 line[match[4].rm_eo] = '\0';
413 line[match[5].rm_eo] = '\0';
414 create_entry(&cmos_entry, &line[match[1].rm_so],
415 &line[match[2].rm_so], &line[match[3].rm_so],
416 &line[match[4].rm_so], &line[match[5].rm_so]);
417 try_add_layout_file_entry(&cmos_entry);
425 /****************************************************************************
428 * Get an enuneration from "enumerations" section of file and add it to our
429 * repository of layout information. Return 0 if an enumeration was found
430 * and processed. Return 1 if there are no more enumerations.
431 ****************************************************************************/
432 static int process_enum(FILE * f, int skip_add)
434 static const size_t N_MATCHES = 4;
435 char line[LINE_BUF_SIZE];
436 regmatch_t match[N_MATCHES];
437 cmos_enum_t cmos_enum;
442 for (;; line_num++) {
443 if (get_layout_file_line(f, line, LINE_BUF_SIZE)) {
445 "%s: Unexpected end of CMOS layout file reached while "
446 "reading \"enumerations\" section.\n",
451 if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
454 if (regexec(&enums_line_expr, line, N_MATCHES, match, 0)) {
455 if (regexec(&start_checksums_expr, line, 0, NULL, 0)) {
457 "%s: Syntax error on line %d of CMOS layout "
458 "file.\n", prog_name, line_num);
462 break; /* start of checksums reached: no more enumerations */
465 result = 0; /* next layout enumeration found */
470 line[match[1].rm_eo] = '\0';
471 line[match[2].rm_eo] = '\0';
472 line[match[3].rm_eo] = '\0';
473 create_enum(&cmos_enum, &line[match[1].rm_so],
474 &line[match[2].rm_so], &line[match[3].rm_so]);
475 try_add_cmos_enum(&cmos_enum);
483 /****************************************************************************
484 * process_checksum_info
486 * Get line conatining CMOS checksum information.
487 ****************************************************************************/
488 static void process_checksum_info(FILE * f)
490 static const size_t N_MATCHES = 4;
491 char line[LINE_BUF_SIZE];
492 regmatch_t match[N_MATCHES];
494 for (;; line_num++) {
495 if (get_layout_file_line(f, line, LINE_BUF_SIZE)) {
497 "%s: Unexpected end of CMOS layout file reached while "
498 "reading \"checksums\" section.\n", prog_name);
502 if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
505 if (regexec(&checksum_line_expr, line, N_MATCHES, match, 0)) {
507 "%s: Syntax error on line %d of CMOS layout "
508 "file. \"checksum\" line expected.\n",
509 prog_name, line_num);
513 /* checksum line found */
514 line[match[1].rm_eo] = '\0';
515 line[match[2].rm_eo] = '\0';
516 line[match[3].rm_eo] = '\0';
517 set_checksum_info(&line[match[1].rm_so], &line[match[2].rm_so],
518 &line[match[3].rm_so]);
523 /****************************************************************************
524 * skip_remaining_lines
526 * Get any remaining lines of unprocessed input. Complain if we find a line
527 * that contains anything other than comments and whitespace.
528 ****************************************************************************/
529 static void skip_remaining_lines(FILE * f)
531 char line[LINE_BUF_SIZE];
534 get_layout_file_line(f, line, LINE_BUF_SIZE) == OK; line_num++) {
535 if (regexec(&blank_or_comment_expr, line, 0, NULL, 0)) {
537 "%s: Syntax error on line %d of CMOS layout file: "
538 "Only comments and/or whitespace allowed after "
539 "\"checksum\" line.\n", prog_name, line_num);
545 /****************************************************************************
548 * Create a CMOS entry structure representing the given information. Perform
549 * sanity checking on input parameters.
550 ****************************************************************************/
551 static void create_entry(cmos_entry_t * cmos_entry,
552 const char start_bit_str[], const char length_str[],
553 const char config_str[], const char config_id_str[],
554 const char name_str[])
556 cmos_entry->bit = string_to_unsigned(start_bit_str, "start-bit");
557 cmos_entry->length = string_to_unsigned(length_str, "length");
559 if (config_str[1] != '\0')
562 switch (config_str[0]) {
564 cmos_entry->config = CMOS_ENTRY_ENUM;
568 cmos_entry->config = CMOS_ENTRY_HEX;
572 cmos_entry->config = CMOS_ENTRY_STRING;
576 cmos_entry->config = CMOS_ENTRY_RESERVED;
583 cmos_entry->config_id = string_to_unsigned(config_id_str, "config-ID");
585 if (strlen(name_str) >= CMOS_MAX_NAME_LENGTH) {
587 "%s: Error on line %d of CMOS layout file: name too "
588 "long (max length is %d).\n", prog_name, line_num,
589 CMOS_MAX_NAME_LENGTH - 1);
593 strcpy(cmos_entry->name, name_str);
598 "%s: Error on line %d of CMOS layout file: 'e', 'h', or "
599 "'r' expected for config value.\n", prog_name, line_num);
603 /****************************************************************************
604 * try_add_layout_file_entry
606 * Attempt to add the given CMOS entry to our internal repository. Exit with
607 * an error message on failure.
608 ****************************************************************************/
609 static void try_add_layout_file_entry(const cmos_entry_t * cmos_entry)
611 const cmos_entry_t *conflict;
613 switch (add_cmos_entry(cmos_entry, &conflict)) {
617 case CMOS_AREA_OUT_OF_RANGE:
619 "%s: Error on line %d of CMOS layout file. Area "
620 "covered by entry %s is out of range.\n", prog_name,
621 line_num, cmos_entry->name);
624 case CMOS_AREA_TOO_WIDE:
626 "%s: Error on line %d of CMOS layout file. Area "
627 "covered by entry %s is too wide.\n", prog_name,
628 line_num, cmos_entry->name);
631 case LAYOUT_ENTRY_OVERLAP:
633 "%s: Error on line %d of CMOS layout file. Layouts "
634 "overlap for entries %s and %s.\n", prog_name, line_num,
635 cmos_entry->name, conflict->name);
638 case LAYOUT_ENTRY_BAD_LENGTH:
639 /* Silently ignore entries with zero length. Although this should
640 * never happen in practice, we should handle the case in a
641 * reasonable manner just to be safe.
652 /****************************************************************************
655 * Create a CMOS enumeration structure representing the given information.
656 * Perform sanity checking on input parameters.
657 ****************************************************************************/
658 static void create_enum(cmos_enum_t * cmos_enum, const char id_str[],
659 const char value_str[], const char text_str[])
661 cmos_enum->config_id = string_to_unsigned(id_str, "ID");
662 cmos_enum->value = string_to_unsigned_long(value_str, "value");
664 if (strlen(text_str) >= CMOS_MAX_TEXT_LENGTH) {
666 "%s: Error on line %d of CMOS layout file: text too "
667 "long (max length is %d).\n", prog_name, line_num,
668 CMOS_MAX_TEXT_LENGTH - 1);
672 strcpy(cmos_enum->text, text_str);
675 /****************************************************************************
678 * Attempt to add the given CMOS enum to our internal repository. Exit with
679 * an error message on failure.
680 ****************************************************************************/
681 static void try_add_cmos_enum(const cmos_enum_t * cmos_enum)
683 switch (add_cmos_enum(cmos_enum)) {
687 case LAYOUT_DUPLICATE_ENUM:
688 fprintf(stderr, "%s: Error on line %d of CMOS layout file: "
689 "Enumeration found with duplicate ID/value combination.\n",
690 prog_name, line_num);
700 /****************************************************************************
703 * Set CMOS checksum information according to input parameters and perform
704 * sanity checking on input parameters.
705 ****************************************************************************/
706 static void set_checksum_info(const char start_str[], const char end_str[],
707 const char index_str[])
709 cmos_checksum_layout_t layout;
711 /* These are bit positions that we want to convert to byte positions. */
712 layout.summed_area_start =
713 string_to_unsigned(start_str, "CMOS checksummed area start");
714 layout.summed_area_end =
715 string_to_unsigned(end_str, "CMOS checksummed area end");
717 string_to_unsigned(index_str, "CMOS checksum location");
719 switch (checksum_layout_to_bytes(&layout)) {
723 case LAYOUT_SUMMED_AREA_START_NOT_ALIGNED:
725 "%s: Error on line %d of CMOS layout file. CMOS "
726 "checksummed area start is not byte-aligned.\n",
727 prog_name, line_num);
730 case LAYOUT_SUMMED_AREA_END_NOT_ALIGNED:
732 "%s: Error on line %d of CMOS layout file. CMOS "
733 "checksummed area end is not byte-aligned.\n",
734 prog_name, line_num);
737 case LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED:
739 "%s: Error on line %d of CMOS layout file. CMOS "
740 "checksum location is not byte-aligned.\n", prog_name,
744 case LAYOUT_INVALID_SUMMED_AREA:
746 "%s: Error on line %d of CMOS layout file. CMOS "
747 "checksummed area end must be greater than CMOS checksummed "
748 "area start.\n", prog_name, line_num);
751 case LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA:
753 "%s: Error on line %d of CMOS layout file. CMOS "
754 "checksum overlaps checksummed area.\n", prog_name,
758 case LAYOUT_SUMMED_AREA_OUT_OF_RANGE:
760 "%s: Error on line %d of CMOS layout file. CMOS "
761 "checksummed area out of range.\n", prog_name,
765 case LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE:
767 "%s: Error on line %d of CMOS layout file. CMOS "
768 "checksum location out of range.\n", prog_name,
776 cmos_checksum_start = layout.summed_area_start;
777 cmos_checksum_end = layout.summed_area_end;
778 cmos_checksum_index = layout.checksum_at;
785 /****************************************************************************
786 * cmos_entry_char_value
788 * Return the character representation of 'config'.
789 ****************************************************************************/
790 static char cmos_entry_char_value(cmos_entry_config_t config)
793 case CMOS_ENTRY_ENUM:
799 case CMOS_ENTRY_RESERVED:
802 case CMOS_ENTRY_STRING:
809 return 0; /* not reached */
812 /****************************************************************************
813 * get_layout_file_line
815 * Get a line of input from file 'f'. Store result in 'line' which is an
816 * array of 'line_buf_size' bytes. Return OK on success or an error code on
818 ****************************************************************************/
819 static int get_layout_file_line(FILE * f, char line[], int line_buf_size)
821 switch (get_line_from_file(f, line, line_buf_size)) {
830 "%s: Error on line %d of CMOS layout file: Maximum "
831 "line length exceeded. Max is %d characters.\n",
832 prog_name, line_num, line_buf_size - 2);
837 return 1; /* keep compiler happy */
840 /****************************************************************************
843 * Convert the string 'str' to an unsigned and return the result.
844 ****************************************************************************/
845 static unsigned string_to_unsigned(const char str[], const char str_name[])
850 n = do_string_to_unsigned_long(str, str_name, "");
852 if ((z = (unsigned)n) != n) {
853 /* This could happen on an architecture in which
854 * sizeof(unsigned) < sizeof(unsigned long).
857 "%s: Error on line %d of CMOS layout file: %s value is "
858 "out of range.\n", prog_name, line_num, str_name);
865 /****************************************************************************
866 * string_to_unsigned_long
868 * Convert the string 'str' to an unsigned long and return the result.
869 ****************************************************************************/
870 static unsigned long string_to_unsigned_long(const char str[],
871 const char str_name[])
873 return do_string_to_unsigned_long(str, str_name, " long");
876 /****************************************************************************
877 * do_string_to_unsigned_long
879 * Convert the string 'str' to an unsigned long and return the result. Exit
880 * with an appropriate error message on failure.
881 ****************************************************************************/
882 static unsigned long do_string_to_unsigned_long(const char str[],
883 const char str_name[],
889 n = strtoul(str, &p, 0);
893 "%s: Error on line %d of CMOS layout file: %s is not a "
894 "valid unsigned%s integer.\n", prog_name, line_num,