summaryrefslogtreecommitdiff
path: root/util/options/build_opt_tbl.c
blob: 910c49cce2ce6c8f3cb61f10cfdb617febd4a185 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2003 Eric Biederman (ebiederm@xmission.com)
 * Copyright (C) 2007-2010 coresystems GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <libgen.h>
#include "../../src/include/pc80/mc146818rtc.h"
#include "../../src/include/boot/coreboot_tables.h"

#define CMOS_IMAGE_BUFFER_SIZE 256
#define INPUT_LINE_MAX 256
#define MAX_VALUE_BYTE_LENGTH 64

#define TMPFILE_LEN 256
#define TMPFILE_TEMPLATE "/build_opt_tbl_XXXXXX"

static unsigned char cmos_table[4096];

/* This array is used to isolate bits that are to be changed in a byte */
static unsigned char clip[9]={0,1,3,7,0x0f,0x1f,0x3f,0x7f,0xff};

#ifdef WIN32
#include <fcntl.h>
char *mkstemp(char* name)
{
	static char val='0';
	char *c=name;
	while (*c!='X') c++;
	*c=val++;
	return open(name,O_CREAT | O_RDWR);
}
#define UNLINK_IF_NECESSARY(x) unlink(x)
#else
#define UNLINK_IF_NECESSARY(x)
#endif

/**
 * This routine loops through the entried and tests if any of the fields
 * overlap.
 * If there is an overlap, the routine exits, otherwise it returns.
 *
 * @param entry_start memory pointer to the start of the entries.
 * @param entry_end   memory pointer to the byte past the entries.
 */
static void test_for_entry_overlaps(void *entry_start, void *entry_end)
{
	int ptr;
	char *cptr;
	int buffer_bit_size;
	int offset;
	int byte;
	int byte_length;
        struct cmos_entries *ce;
	unsigned char test[CMOS_IMAGE_BUFFER_SIZE];
	unsigned char set;

	/* calculate the size of the cmos buffer in bits */
	buffer_bit_size=(CMOS_IMAGE_BUFFER_SIZE*8);
	/* clear the temporary test buffer */
	for(ptr=0; ptr < CMOS_IMAGE_BUFFER_SIZE; ptr++)
		test[ptr]=0;

	/* loop through each entry in the table testing for errors */
	for(cptr = entry_start; cptr < (char *)entry_end; cptr += ce->size) {
		ce=(struct cmos_entries *)cptr;
		/* test if entry goes past the end of the buffer */
		if((int)(ce->bit+ce->length) > buffer_bit_size) {
			printf("Error - Entry %s start bit + length must be less than %d\n",
				ce->name,buffer_bit_size);
			exit(1);
		}
		byte=ce->bit/8;
		offset=ce->bit%8;
		byte_length=ce->length/8;
		if(byte_length) {	/* entry is 8 bits long or more */
			if(offset) { /* if 8 bits or more long, it must be byte aligned */
				printf("Error - Entry %s length over 8 must be byte aligned\n",
					ce->name);
				exit(1);
			}
			/* test if entries 8 or more in length are even bytes */ 
			if(ce->length%8){
                                printf("Error - Entry %s length over 8 must be a multiple of 8\n",
                                        ce->name);
                                exit(1);
                        }
			/* test if any of the bits have been previously used */
			for(;byte_length;byte_length--,byte++) {
				if(test[byte]) {
					printf("Error - Entry %s uses same bits previously used\n",
						ce->name);
					exit(1);
	                        }
				test[byte]=clip[8]; /* set the bits defined in test */
			}
		} else {
			/* test if bits overlap byte boundaries */
			if((int)ce->length > (8-offset)) {
                                printf("Error - Entry %s length overlaps a byte boundry\n",
					ce->name);
                                exit(1);
                        }
			/* test for bits previously used */
			set=(clip[ce->length]<<offset);
			if(test[byte]&set) {
                        	printf("Error - Entry %s uses same bits previously used\n",
                                                ce->name);
                                exit(1);
                        }
                        test[byte]|=set;  /* set the bits defined in test */
		}
	}
	return;
}

/* This routine displays the usage options */
static void display_usage(char *name)
{
	printf("Usage: %s [--config filename]\n", name);
	printf("                       [--option filename]\n");
	printf("                       [--header filename]\n\n");
	printf("--config = Build the definitions table from the given file.\n");
	printf("--option = Output a C source file with the definitions.\n");
	printf("--header = Ouput a C header file with the definitions.\n");
	exit(1);
}

static void skip_spaces(char *line, char **ptr)
{
	if (!isspace(**ptr)) {
		printf("Error missing whitespace in line\n%s\n", line);
		exit(1);
	}
	while(isspace(**ptr)) {
		(*ptr)++;
	}
	return;
}

static unsigned long get_number(char *line, char **ptr, int base)
{
	unsigned long value;
	char *ptr2;
	value = strtoul(*ptr, &ptr2, base);
	if (ptr2 == *ptr) {
		printf("Error missing digits at: \n%s\n in line:\n%s\n", 
			*ptr, line);
		exit(1);
	}
	*ptr = ptr2;
	return value;
}

static int is_ident_digit(int c)
{
	int result;
	switch(c) {
	case '0':	case '1':	case '2':	case '3':
	case '4':	case '5':	case '6':	case '7':
	case '8':	case '9':
		result = 1;
		break;
	default:
		result = 0;
		break;
	}
	return result;
}

static int is_ident_nondigit(int c)
{
	int result;
	switch(c) {
	case 'A':	case 'B':	case 'C':	case 'D':
	case 'E':	case 'F':	case 'G':	case 'H':
	case 'I':	case 'J':	case 'K':	case 'L':
	case 'M':	case 'N':	case 'O':	case 'P':
	case 'Q':	case 'R':	case 'S':	case 'T':
	case 'U':	case 'V':	case 'W':	case 'X':
	case 'Y':	case 'Z':
	case 'a':	case 'b':	case 'c':	case 'd':
	case 'e':	case 'f':	case 'g':	case 'h':
	case 'i':	case 'j':	case 'k':	case 'l':
	case 'm':	case 'n':	case 'o':	case 'p':
	case 'q':	case 'r':	case 's':	case 't':
	case 'u':	case 'v':	case 'w':	case 'x':
	case 'y':	case 'z':
	case '_':
		result = 1;
		break;
	default:
		result = 0;
		break;
	}
	return result;
}

static int is_ident(char *str)
{
	int result;
	int ch;
	ch = *str;
	result = 0;
	if (is_ident_nondigit(ch)) {
		do {
			str++;
			ch = *str;
		} while(ch && (is_ident_nondigit(ch) || (is_ident_digit(ch))));
		result = (ch == '\0');
	}
	return result;
}

/**
 * This routine builds the cmos definition table from the cmos layout file
 *
 * The input comes from the configuration file which contains two parts
 * entries and enumerations.  Each section is started with the key words
 * entries and enumerations.  Records then follow in their respective 
 * formats.
 *
 * The output of this program is the cmos definitions table.  It is stored
 * in the cmos_table array. If this module is called, and the global 
 * table_file has been implimented by the user, the table is also written
 * to the specified file.
 *
 * This program exits with a return code of 1 on error.  It returns 0 on 
 * successful completion
 */
int main(int argc, char **argv)
{
	int i;
	char *config=0;
	char *option=0;
	char *header=0;
	FILE *fp;
	int tempfile;
	char tempfilename[TMPFILE_LEN];
	struct cmos_option_table *ct;
	struct cmos_entries *ce;
	struct cmos_enums *c_enums, *c_enums_start;
	struct cmos_checksum *cs, *new_cs;
	char line[INPUT_LINE_MAX];
	unsigned char uc;
	int entry_mode=0;
	int enum_mode=0;
	int checksum_mode=0;
	int cnt;
	char *cptr;
	void *entry_start, *entry_end;
	int entries_length;
	int enum_length;
	int len;
	char buf[16];

        for(i=1;i<argc;i++) {
                if(argv[i][0]!='-') {
                        display_usage(argv[0]);
                }
                switch(argv[i][1]) {
                        case '-':       /* data is requested from a file */
                                switch(argv[i][2]) {
                                        case 'c':  /* use a configuration file */
                                                if(strcmp(&argv[i][2],"config")) {
                                                        display_usage(argv[0]);
                                                }
                                                config=argv[++i];
                                                break;
                                        case 'o':  /* use a cmos definitions table file */
                                                if(strcmp(&argv[i][2],"option")) {
                                                        display_usage(argv[0]);
                                                }
                                                option=argv[++i];
                                                break;
					case 'h': /* Output a header file */
						if (strcmp(&argv[i][2], "header") != 0) {
							display_usage(argv[0]);
						}
						header=argv[++i];
						break;
                                        default:
                                                display_usage(argv[0]);
                                                break;
                                }
                                break;

                        default:
                                display_usage(argv[0]);
                                break;
                }
        }


	/* Has the user specified a configuration file */
	if(config) {	/* if yes, open it */
		if((fp=fopen(config,"r"))==NULL){
			fprintf(stderr, "Error - Can not open config file %s\n",config);
			exit(1);  /* exit if it can not be opened */
		}
	}
	else {  /* no configuration file specified, so try the default */
		if((fp=fopen("cmos.layout","r"))==NULL){
			fprintf(stderr, "Error - Can not open cmos.layout\n");
			exit(1);  /* end of no configuration file is found */
		}
	}
	/* type cast a pointer, so we can us the structure */
	ct=(struct cmos_option_table*)cmos_table;
	/* start the table with the type signature */
	ct->tag = LB_TAG_CMOS_OPTION_TABLE;
	/* put in the header length */
	ct->header_length=sizeof(*ct);

	/* Get the entry records */
	ce=(struct cmos_entries*)(cmos_table+(ct->header_length));
	cptr = (char*)ce;
	for(;;){  /* this section loops through the entry records */
		if(fgets(line,INPUT_LINE_MAX,fp)==NULL) 
			break; /* end if no more input */
		// FIXME mode should be a single enum.
		if(!entry_mode) {  /* skip input until the entries key word */
			if (strstr(line,"entries") != 0) {
				entry_mode=1;
				enum_mode=0;
				checksum_mode=0;
				continue;
			}
		} else {  /* Test if we are done with entries and starting enumerations */
			if (strstr(line,"enumerations") != 0){
				entry_mode=0;
				enum_mode=1;
				checksum_mode=0;
				break;
			}
			if (strstr(line, "checksums") != 0) {
				entry_mode=0;
				enum_mode=0;
				checksum_mode=1;
				break;
			}
		}

		/* skip commented and blank lines */
		if(line[0]=='#') continue;
		if(line[strspn(line," ")]=='\n') continue;
		/* scan in the input data */
		sscanf(line,"%d %d %c %d %s",
			&ce->bit,&ce->length,&uc,&ce->config_id,&ce->name[0]);
		ce->config=(int)uc;
		/* check bit and length ranges */
		if(ce->bit>(CMOS_IMAGE_BUFFER_SIZE*8)) {
                        fprintf(stderr, "Error - bit is to big in line \n%s\n",line);
                        exit(1);
                }
		if((ce->length>(MAX_VALUE_BYTE_LENGTH*8))&&(uc!='r')) {
			fprintf(stderr, "Error - Length is to long in line \n%s\n",line);
			exit(1);
		}
		if (!is_ident((char *)ce->name)) {
			fprintf(stderr, 
				"Error - Name %s is an invalid identifier in line\n %s\n", 
				ce->name, line);
			exit(1);
		}
		/* put in the record type */
		ce->tag=LB_TAG_OPTION;
		/* calculate and save the record length */
		len=strlen((char *)ce->name)+1;
		/* make the record int aligned */
		if(len%4)
			len+=(4-(len%4));
		ce->size=sizeof(struct cmos_entries)-32+len;
		cptr = (char*)ce;
		cptr += ce->size;  /* increment to the next table position */
		ce = (struct cmos_entries*) cptr;
	}

	/* put the length of the entries into the header section */
	entries_length = (cptr - (char *)&cmos_table) - ct->header_length;

	/* compute the start of the enumerations section */
	entry_start = ((char*)&cmos_table) + ct->header_length;
	entry_end   = ((char *)entry_start) + entries_length;
	c_enums_start = c_enums = (struct cmos_enums*)entry_end;
  	/* test for overlaps in the entry records */
	test_for_entry_overlaps(entry_start, entry_end);

	for(;enum_mode;){ /* loop to build the enumerations section */
		long ptr;
		if(fgets(line,INPUT_LINE_MAX,fp)==NULL) 
			break; /* go till end of input */

		if (strstr(line, "checksums") != 0) {
			enum_mode=0;
			checksum_mode=1;
			break;
		}

		/* skip commented and blank lines */
		if(line[0]=='#') continue;
		if(line[strspn(line," ")]=='\n') continue;

		/* scan in the data */
		for(ptr=0;(line[ptr]==' ')||(line[ptr]=='\t');ptr++);
		c_enums->config_id=strtol(&line[ptr],(char**)NULL,10);
		for(;(line[ptr]!=' ')&&(line[ptr]!='\t');ptr++);
		for(;(line[ptr]==' ')||(line[ptr]=='\t');ptr++);
		c_enums->value=strtol(&line[ptr],(char**)NULL,10);
		for(;(line[ptr]!=' ')&&(line[ptr]!='\t');ptr++);
		for(;(line[ptr]==' ')||(line[ptr]=='\t');ptr++);
		for(cnt=0;(line[ptr]!='\n')&&(cnt<31);ptr++,cnt++)
			c_enums->text[cnt]=line[ptr];
		c_enums->text[cnt]=0;
	
		/* make the record int aligned */
		cnt++;
		if(cnt%4)
			cnt+=4-(cnt%4);
		/* store the record length */
		c_enums->size=((char *)&c_enums->text[cnt]) - (char *)c_enums;
		/* store the record type */
		c_enums->tag=LB_TAG_OPTION_ENUM;
		/* increment to the next record */
		c_enums=(struct cmos_enums*)&c_enums->text[cnt];
	}
	/* save the enumerations length */
	enum_length= (char *)c_enums - (char *)c_enums_start;
	ct->size=ct->header_length+enum_length+entries_length;

	/* Get the checksum records */
	new_cs = (struct cmos_checksum *)(cmos_table+(ct->size));
	for(;checksum_mode;) { /* This section finds the checksums */
		char *ptr;
		if(fgets(line, INPUT_LINE_MAX,fp)==NULL)
			break; /* end if no more input */

		/* skip commented and blank lines */
		if (line[0]=='#') continue;
		if (line[strspn(line, " ")]=='\n') continue;
		if (memcmp(line, "checksum", 8) != 0) continue;

		/* We actually found a new cmos checksum entry */
		cs = new_cs;

		/* get the information */
		ptr = line + 8;
		skip_spaces(line, &ptr);
		cs->range_start = get_number(line, &ptr, 10);

		skip_spaces(line, &ptr);
		cs->range_end = get_number(line, &ptr, 10);

		skip_spaces(line, &ptr);
		cs->location = get_number(line, &ptr, 10);
		
		/* Make certain there are spaces until the end of the line */
		skip_spaces(line, &ptr);

		if ((cs->range_start%8) != 0) {
			fprintf(stderr, "Error - range start is not byte aligned in line\n%s\n", line);
			exit(1);
		}
		if (cs->range_start >= (CMOS_IMAGE_BUFFER_SIZE*8)) {
			fprintf(stderr, "Error - range start is to big in line\n%s\n", line);
			exit(1);
		}
		if ((cs->range_end%8) != 7) {
			fprintf(stderr, "Error - range end is not byte aligned in line\n%s\n", line);
			exit(1);
		}
		if ((cs->range_end) >= (CMOS_IMAGE_BUFFER_SIZE*8)) {
			fprintf(stderr, "Error - range end is to long in line\n%s\n", line);
			exit(1);
		}
		if ((cs->location%8) != 0) {
			fprintf(stderr, "Error - location is not byte aligned in line\n%s\n", line);
			exit(1);
		}
		if ((cs->location >= (CMOS_IMAGE_BUFFER_SIZE*8)) ||
			((cs->location + 16) > (CMOS_IMAGE_BUFFER_SIZE*8))) 
		{
			fprintf(stderr, "Error - location is to big in line\n%s\n", line);
			exit(1);
		}

		cs->tag = LB_TAG_OPTION_CHECKSUM;
		cs->size = sizeof(*cs);
		cs->type = CHECKSUM_PCBIOS;

		cptr = (char *)cs;
		cptr += cs->size;
		new_cs = (struct cmos_checksum *)cptr;
	}
	ct->size += (cptr - (char *)(cmos_table + ct->size));
	fclose(fp);

	/* See if we want to output a C source file */
	if(option) {
		int err=0;
		strncpy(tempfilename, dirname(strdup(option)), TMPFILE_LEN);
	        strncat(tempfilename, TMPFILE_TEMPLATE, TMPFILE_LEN);
		tempfile = mkstemp(tempfilename);
		if(tempfile == -1) {
                        perror("Error - Could not create temporary file");
                        exit(1);
		}

		if((fp=fdopen(tempfile,"w"))==NULL){
			perror("Error - Could not open temporary file");
			unlink(tempfilename);
			exit(1);
		}

		/* write the header */
        	if(!fwrite("unsigned char option_table[] = {",1,32,fp)) {
        	        perror("Error - Could not write image file");
        	        fclose(fp);
			unlink(tempfilename);
        	        exit(1);
        	}
		/* write the array values */
		for(i=0; i<(int)(ct->size-1); i++) {
			if(!(i%10) && !err) err=!fwrite("\n\t",1,2,fp);
			sprintf(buf,"0x%02x,",cmos_table[i]);
			if(!err) err=!fwrite(buf,1,5,fp);
		}
		/* write the end */
		sprintf(buf,"0x%02x\n",cmos_table[i]);
		if(!err) err=!fwrite(buf,1,4,fp);
        	if(!fwrite("};\n",1,3,fp)) {
        	        perror("Error - Could not write image file");
        	        fclose(fp);
			unlink(tempfilename);
        	        exit(1);
        	}

        	fclose(fp);
		UNLINK_IF_NECESSARY(option);
		if (rename(tempfilename, option)) {
			fprintf(stderr, "Error - Could not write %s: ", option);
			perror(NULL);
			unlink(tempfilename);
			exit(1);
		}
	}

	/* See if we also want to output a C header file */
	if (header) {
		struct cmos_option_table *hdr;
		struct lb_record *ptr, *end;

		strncpy(tempfilename, dirname(strdup(option)), TMPFILE_LEN);
	        strncat(tempfilename, TMPFILE_TEMPLATE, TMPFILE_LEN);
		tempfile = mkstemp(tempfilename);
		if(tempfile == -1) {
			perror("Error - Could not create temporary file");
			exit(1);
		}

		fp = fdopen(tempfile, "w");
		if (!fp) {
			perror("Error - Could not open temporary file");
			unlink(tempfilename);
			exit(1);
		}

		/* Get the cmos table header */
		hdr = (struct cmos_option_table *)cmos_table;
		/* Walk through the entry records */
		ptr = (struct lb_record *)(cmos_table + hdr->header_length);
		end = (struct lb_record *)(cmos_table + hdr->size);
		for(;ptr < end; ptr = (struct lb_record *)(((char *)ptr) + ptr->size)) {
			if (ptr->tag != LB_TAG_OPTION) {
				continue;
			}
			ce = (struct cmos_entries *)ptr;

			if (!is_ident((char *)ce->name)) {
				fprintf(stderr, "Invalid identifier: %s\n",
					ce->name);
				fclose(fp);
				unlink(tempfilename);
				exit(1);
			}
			fprintf(fp, "#define CMOS_VSTART_%s %d\n",
				ce->name, ce->bit);
			fprintf(fp, "#define CMOS_VLEN_%s %d\n",
				ce->name, ce->length);
		}
		fprintf(fp, "\n#define LB_CKS_RANGE_START %d\n", cs->range_start / 8);
		fprintf(fp, "#define LB_CKS_RANGE_END %d\n", cs->range_end / 8);
		fprintf(fp, "#define LB_CKS_LOC %d\n", cs->location / 8);
		fclose(fp);

		UNLINK_IF_NECESSARY(header);
		if (rename(tempfilename, header)) {
			fprintf(stderr, "Error - Could not write %s: ", header);
			perror(NULL);
			unlink(tempfilename);
			exit(1);
		}
	}

	return 0;
}