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   1 /*-------------------------------------------------------------------------
   2
   3    device.c - Accomodates subtle variations in PIC devices
   4    Written By -  Scott Dattalo scott@dattalo.com
   5
   6    This program is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by the
   8    Free Software Foundation; either version 2, or (at your option) any
   9    later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 -------------------------------------------------------------------------*/
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <ctype.h>
  24
  25 #include "common.h"   // Include everything in the SDCC src directory
  26 #include "newalloc.h"
  27
  28
  29 #include "main.h"
  30 #include "pcode.h"
  31 #include "ralloc.h"
  32 #include "device.h"
  33
  34 #if defined(__BORLANDC__) || defined(_MSC_VER)
  35 #define STRCASECMP stricmp
  36 #define STRNCASECMP strnicmp
  37 #else
  38 #define STRCASECMP strcasecmp
  39 #define STRNCASECMP strncasecmp
  40 #endif
  41
  42 extern int Gstack_base_addr;
  43 extern int Gstack_size;
  44
  45 #define MAX_PICLIST 200
  46 static PIC_device *Pics[MAX_PICLIST];
  47 static int num_of_supported_PICS = 0;
  48
  49 static PIC_device *pic=NULL;
  50
  51 int maxRAMaddress = 0;
  52
  53 #define CONFIG_WORD_ADDRESS 0x2007
  54 #define CONFIG2_WORD_ADDRESS 0x2008
  55 #define DEFAULT_CONFIG_WORD 0x3fff
  56 #define DEFAULT_CONFIG2_WORD 0x3ffc
  57
  58 #define DEVICE_FILE_NAME "pic14devices.txt"
  59 #define PIC14_STRING_LEN 256
  60 #define SPLIT_WORDS_MAX 16
  61
  62 static unsigned int config_word = DEFAULT_CONFIG_WORD;
  63 static unsigned int config2_word = DEFAULT_CONFIG2_WORD;
  64 static memRange *rangeRAM = NULL;
  65
  66
  67 /* parse a value from the configuration file */
  68 static int parse_config_value(char *str)
  69 {
  70         if (str[strlen(str) - 1] == 'K')
  71                 return atoi(str) * 1024;        /* like "1K" */
  72
  73         else if (STRNCASECMP(str, "0x", 2) == 0)
  74                 return strtol(str+2, NULL, 16); /* like "0x400" */
  75
  76         else
  77                 return atoi(str);               /* like "1024" */
  78 }
  79
  80
  81 /* split a line into words */
  82 static int split_words(char result_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN], char *str)
  83 {
  84         char *pos = str;
  85         int num_words = 0;
  86         int ccount;
  87
  88         while (*pos != '\0' && num_words < SPLIT_WORDS_MAX) {
  89                 /* remove leading spaces */
  90                 while (isspace(*pos) || *pos == ',')
  91                         pos++;
  92
  93                 /* copy everything up until the first space or comma */
  94                 for (ccount = 0; *pos != '\0' && !isspace(*pos) && *pos != ',' && ccount < PIC14_STRING_LEN-1; ccount++, pos++)
  95                         result_word[num_words][ccount] = *pos;
  96                 result_word[num_words][ccount] = '\0';
  97
  98                 num_words++;
  99         }
 100
 101         return num_words;
 102 }
 103
 104
 105 /* remove annoying prefixes from the processor name */
 106 static char *sanitise_processor_name(char *name)
 107 {
 108         char *proc_pos = name;
 109
 110         if (name == NULL)
 111                 return NULL;
 112
 113         if (STRNCASECMP(proc_pos, "pic", 3) == 0)
 114                 proc_pos += 3;
 115
 116         else if (tolower(*proc_pos) == 'p')
 117                 proc_pos += 1;
 118
 119         return proc_pos;
 120 }
 121
 122
 123 /* create a structure for a pic processor */
 124 static PIC_device *create_pic(char *pic_name, int maxram, int bankmsk, int confsiz, int program, int data, int eeprom, int io)
 125 {
 126         PIC_device *new_pic;
 127         char *simple_pic_name = sanitise_processor_name(pic_name);
 128
 129         new_pic = Safe_calloc(1, sizeof(PIC_device));
 130         new_pic->name = Safe_calloc(strlen(simple_pic_name)+1, sizeof(char));
 131         strcpy(new_pic->name, simple_pic_name);
 132
 133         new_pic->defMaxRAMaddrs = maxram;
 134         new_pic->bankMask = bankmsk;
 135         new_pic->hasSecondConfigReg = confsiz > 1;
 136
 137         new_pic->programMemSize = program;
 138         new_pic->dataMemSize = data;
 139         new_pic->eepromMemSize = eeprom;
 140         new_pic->ioPins = io;
 141
 142         new_pic->ram = rangeRAM;
 143
 144         Pics[num_of_supported_PICS] = new_pic;
 145         num_of_supported_PICS++;
 146
 147         return new_pic;
 148 }
 149
 150
 151 /* mark some registers as being duplicated across banks */
 152 static void register_map(int num_words, char word[SPLIT_WORDS_MAX][PIC14_STRING_LEN])
 153 {
 154         memRange *r;
 155         int pcount;
 156
 157         if (num_words < 3) {
 158                 fprintf(stderr, "WARNING: not enough values in %s regmap directive\n", DEVICE_FILE_NAME);
 159                 return;
 160         }
 161
 162         for (pcount = 2; pcount < num_words; pcount++) {
 163                 r = Safe_calloc(1, sizeof(memRange));
 164
 165                 r->start_address = parse_config_value(word[pcount]);
 166                 r->end_address = parse_config_value(word[pcount]);
 167                 r->alias = parse_config_value(word[1]);
 168                 r->bank = (r->start_address >> 7) & 3;
 169                 // add memRange to device entry for future lookup (sharebanks)
 170                 r->next = rangeRAM;
 171                 rangeRAM = r;
 172         }
 173 }
 174
 175
 176 /* define ram areas - may be duplicated across banks */
 177 static void ram_map(int num_words, char word[SPLIT_WORDS_MAX][PIC14_STRING_LEN])
 178 {
 179         memRange *r;
 180
 181         if (num_words < 4) {
 182                 fprintf(stderr, "WARNING: not enough values in %s memmap directive\n", DEVICE_FILE_NAME);
 183                 return;
 184         }
 185
 186         r = Safe_calloc(1, sizeof(memRange));
 187         //fprintf (stderr, "%s: %s %s %s\n", __FUNCTION__, word[1], word[2], word[3]);
 188
 189         r->start_address = parse_config_value(word[1]);
 190         r->end_address = parse_config_value(word[2]);
 191         r->alias = parse_config_value(word[3]);
 192         r->bank = (r->start_address >> 7) & 3;
 193
 194         // add memRange to device entry for future lookup (sharebanks)
 195         r->next = rangeRAM;
 196         rangeRAM = r;
 197 }
 198
 199 extern set *includeDirsSet;
 200 extern set *userIncDirsSet;
 201 extern set *libDirsSet;
 202 extern set *libPathsSet;
 203
 204 /* read the file with all the pic14 definitions and pick out the definition for a processor
 205  * if specified. if pic_name is NULL reads everything */
 206 static PIC_device *find_device(char *pic_name)
 207 {
 208         FILE *pic_file;
 209         char pic_buf[PIC14_STRING_LEN];
 210         char *pic_buf_pos;
 211         int found_processor = FALSE;
 212         int done = FALSE;
 213         char processor_name[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
 214         int num_processor_names = 0;
 215         int pic_maxram = 0;
 216         int pic_bankmsk = 0;
 217         int pic_confsiz = 0;
 218         int pic_program = 0;
 219         int pic_data = 0;
 220         int pic_eeprom = 0;
 221         int pic_io = 0;
 222         char *simple_pic_name;
 223         char *dir;
 224         char filename[512];
 225         int len = 512;
 226
 227         /* allow abbreviations of the form "f877" - convert to "16f877" */
 228         simple_pic_name = sanitise_processor_name(pic_name);
 229         num_of_supported_PICS = 0;
 230
 231         /* open the piclist file */
 232         /* first scan all include directories */
 233         pic_file = NULL;
 234         //fprintf( stderr, "%s: searching %s\n", __FUNCTION__, DEVICE_FILE_NAME );
 235         for (dir = setFirstItem(includeDirsSet);
 236                 !pic_file && dir;
 237                 dir = setNextItem(includeDirsSet))
 238         {
 239           //fprintf( stderr, "searching1 %s\n", dir );
 240           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 241           pic_file = fopen( filename, "rt" );
 242           if (pic_file) break;
 243         } // for
 244         for (dir = setFirstItem(userIncDirsSet);
 245                 !pic_file && dir;
 246                 dir = setNextItem(userIncDirsSet))
 247         {
 248           //fprintf( stderr, "searching2 %s\n", dir );
 249           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 250           pic_file = fopen( filename, "rt" );
 251           if (pic_file) break;
 252         } // for
 253         for (dir = setFirstItem(libDirsSet);
 254                 !pic_file && dir;
 255                 dir = setNextItem(libDirsSet))
 256         {
 257           //fprintf( stderr, "searching3 %s\n", dir );
 258           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 259           pic_file = fopen( filename, "rt" );
 260           if (pic_file) break;
 261         } // for
 262         for (dir = setFirstItem(libPathsSet);
 263                 !pic_file && dir;
 264                 dir = setNextItem(libPathsSet))
 265         {
 266           //fprintf( stderr, "searching4 %s\n", dir );
 267           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 268           pic_file = fopen( filename, "rt" );
 269           if (pic_file) break;
 270         } // for
 271         if (!pic_file) {
 272           pic_file = fopen(DATADIR LIB_DIR_SUFFIX DIR_SEPARATOR_STRING "pic" DIR_SEPARATOR_STRING DEVICE_FILE_NAME, "rt");
 273         }
 274         if (pic_file == NULL) {
 275                 /* this second attempt is used when initially building the libraries */
 276                 pic_file = fopen(".." DIR_SEPARATOR_STRING ".." DIR_SEPARATOR_STRING ".." DIR_SEPARATOR_STRING ".."
 277                                 DIR_SEPARATOR_STRING "src" DIR_SEPARATOR_STRING "pic" DIR_SEPARATOR_STRING
 278                                 DEVICE_FILE_NAME, "rt");
 279                 if (pic_file == NULL) {
 280                         fprintf(stderr, "can't find %s\n", DATADIR LIB_DIR_SUFFIX DIR_SEPARATOR_STRING "pic"
 281                                         DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 282                         return NULL;
 283                 }
 284         }
 285
 286         /* read line by line */
 287         pic_buf[sizeof(pic_buf)-1] = '\0';
 288         while (fgets(pic_buf, sizeof(pic_buf)-1, pic_file) != NULL && !done) {
 289
 290                 /* remove trailing spaces */
 291                 while (isspace(pic_buf[strlen(pic_buf)-1]))
 292                         pic_buf[strlen(pic_buf)-1] = '\0';
 293
 294                 /* remove leading spaces */
 295                 for (pic_buf_pos = pic_buf; isspace(*pic_buf_pos); pic_buf_pos++)
 296                 {}
 297
 298                 /* ignore comment / empty lines */
 299                 if (*pic_buf_pos != '\0' && *pic_buf_pos != '#') {
 300
 301                         /* split into fields */
 302                         char pic_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
 303                         int num_pic_words;
 304                         int wcount;
 305
 306                         num_pic_words = split_words(pic_word, pic_buf_pos);
 307
 308                         if (STRCASECMP(pic_word[0], "processor") == 0) {
 309
 310                                 if (pic_name == NULL) {
 311                                         /* this is the mode where we read all the processors in - store the names for now */
 312                                         if (num_processor_names > 0) {
 313                                                 /* store away all the previous processor definitions */
 314                                                 int dcount;
 315
 316                                                 for (dcount = 1; dcount < num_processor_names; dcount++)
 317                                                         create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
 318                                                                    pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 319                                         }
 320
 321                                         num_processor_names = split_words(processor_name, pic_buf_pos);
 322                                 }
 323                                 else {
 324                                         /* if we've just completed reading a processor definition stop now */
 325                                         if (found_processor)
 326                                                 done = TRUE;
 327                                         else {
 328                                                 /* check if this processor name is a match */
 329                                                 for (wcount = 1; wcount < num_pic_words; wcount++) {
 330
 331                                                         /* skip uninteresting prefixes */
 332                                                         char *found_name = sanitise_processor_name(pic_word[wcount]);
 333
 334                                                         if (STRCASECMP(found_name, simple_pic_name) == 0)
 335                                                                 found_processor = TRUE;
 336                                                 }
 337                                         }
 338                                 }
 339                         }
 340
 341                         else {
 342                                 if (found_processor || pic_name == NULL) {
 343                                         /* only parse a processor section if we've found the one we want */
 344                                         if (STRCASECMP(pic_word[0], "maxram") == 0 && num_pic_words > 1) {
 345                                                 pic_maxram = parse_config_value(pic_word[1]);
 346                                                 setMaxRAM(pic_maxram);
 347                                         }
 348                                         else if (STRCASECMP(pic_word[0], "bankmsk") == 0 && num_pic_words > 1)
 349                                                 pic_bankmsk = parse_config_value(pic_word[1]);
 350
 351                                         else if (STRCASECMP(pic_word[0], "confsiz") == 0 && num_pic_words > 1)
 352                                                 pic_confsiz = parse_config_value(pic_word[1]);
 353
 354                                         else if (STRCASECMP(pic_word[0], "program") == 0 && num_pic_words > 1)
 355                                                 pic_program = parse_config_value(pic_word[1]);
 356
 357                                         else if (STRCASECMP(pic_word[0], "data") == 0 && num_pic_words > 1)
 358                                                 pic_data = parse_config_value(pic_word[1]);
 359
 360                                         else if (STRCASECMP(pic_word[0], "eeprom") == 0 && num_pic_words > 1)
 361                                                 pic_eeprom = parse_config_value(pic_word[1]);
 362
 363                                         else if (STRCASECMP(pic_word[0], "io") == 0 && num_pic_words > 1)
 364                                                 pic_io = parse_config_value(pic_word[1]);
 365
 366                                         else if (STRCASECMP(pic_word[0], "regmap") == 0 && num_pic_words > 2) {
 367                                                 if (found_processor)
 368                                                         register_map(num_pic_words, pic_word);
 369                                         }
 370                                         else if (STRCASECMP(pic_word[0], "memmap") == 0 && num_pic_words > 2) {
 371                                                 if (found_processor)
 372                                                         ram_map(num_pic_words, pic_word);
 373                                         }
 374                                         else {
 375                                                 fprintf(stderr, "WARNING: %s: bad syntax `%s'\n", DEVICE_FILE_NAME, pic_word[0]);
 376                                         }
 377                                 }
 378                         }
 379                 }
 380         }
 381
 382         fclose(pic_file);
 383
 384         /* if we're in read-the-lot mode then create the final processor definition */
 385         if (pic_name == NULL) {
 386
 387                 if (num_processor_names > 0) {
 388                         /* store away all the previous processor definitions */
 389                         int dcount;
 390
 391                         for (dcount = 1; dcount < num_processor_names; dcount++)
 392                                 create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
 393                                            pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 394                 }
 395         }
 396         else {
 397                 /* in search mode */
 398                 if (found_processor) {
 399                         /* create a new pic entry */
 400                         return create_pic(pic_name, pic_maxram, pic_bankmsk,
 401                                           pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 402                 }
 403         }
 404
 405         return NULL;
 406 }
 407
 408 void setMaxRAM(int size)
 409 {
 410         maxRAMaddress = size;
 411
 412         if (maxRAMaddress < 0) {
 413                 fprintf(stderr, "invalid maxram 0x%x setting in %s\n",
 414                         maxRAMaddress, DEVICE_FILE_NAME);
 415                 return;
 416         }
 417 }
 418
 419 /*-----------------------------------------------------------------*
 420 *-----------------------------------------------------------------*/
 421
 422 int isREGinBank(regs *reg, int bank)
 423 {
 424
 425         if(!reg || !pic)
 426                 return 0;
 427
 428         if((int)((reg->address | reg->alias) & pic->bankMask & bank) == bank)
 429                 return 1;
 430
 431         return 0;
 432 }
 433
 434 /*-----------------------------------------------------------------*
 435 *-----------------------------------------------------------------*/
 436 int REGallBanks(regs *reg)
 437 {
 438
 439         if(!reg || !pic)
 440                 return 0;
 441
 442         return ((reg->address | reg->alias) & pic->bankMask);
 443
 444 }
 445
 446 /*-----------------------------------------------------------------*
 447  *  void list_valid_pics(int ncols, int list_alias)
 448  *
 449  * Print out a formatted list of valid PIC devices
 450  *
 451  * ncols - number of columns in the list.
 452  *
 453  * list_alias - if non-zero, print all of the supported aliases
 454  *              for a device (e.g. F84, 16F84, etc...)
 455  *-----------------------------------------------------------------*/
 456 void list_valid_pics(int ncols)
 457 {
 458         int col=0,longest;
 459         int i,k,l;
 460
 461         if (num_of_supported_PICS == 0)
 462                 find_device(NULL);          /* load all the definitions */
 463
 464         /* decrement the column number if it's greater than zero */
 465         ncols = (ncols > 1) ? ncols-1 : 4;
 466
 467         /* Find the device with the longest name */
 468         for(i=0,longest=0; i<num_of_supported_PICS; i++) {
 469                 k = strlen(Pics[i]->name);
 470                 if(k>longest)
 471                         longest = k;
 472         }
 473
 474 #if 1
 475         /* heading */
 476         fprintf(stderr, "\nPIC14 processors and their characteristics:\n\n");
 477         fprintf(stderr, " processor");
 478         for(k=0; k<longest-1; k++)
 479                 fputc(' ',stderr);
 480         fprintf(stderr, "program     RAM      EEPROM    I/O\n");
 481         fprintf(stderr, "-----------------------------------------------------\n");
 482
 483         for(i=0;  i < num_of_supported_PICS; i++) {
 484                 fprintf(stderr,"  %s", Pics[i]->name);
 485                 l = longest + 2 - strlen(Pics[i]->name);
 486                 for(k=0; k<l; k++)
 487                         fputc(' ',stderr);
 488
 489                 fprintf(stderr, "     ");
 490                 if (Pics[i]->programMemSize % 1024 == 0)
 491                         fprintf(stderr, "%4dK", Pics[i]->programMemSize / 1024);
 492                 else
 493                         fprintf(stderr, "%5d", Pics[i]->programMemSize);
 494
 495                 fprintf(stderr, "     %5d     %5d     %4d\n",
 496                         Pics[i]->dataMemSize, Pics[i]->eepromMemSize, Pics[i]->ioPins);
 497         }
 498
 499         col = 0;
 500
 501         fprintf(stderr, "\nPIC14 processors supported:\n");
 502         for(i=0;  i < num_of_supported_PICS; i++) {
 503
 504                 fprintf(stderr,"%s", Pics[i]->name);
 505                 if(col<ncols) {
 506                         l = longest + 2 - strlen(Pics[i]->name);
 507                         for(k=0; k<l; k++)
 508                                 fputc(' ',stderr);
 509
 510                         col++;
 511
 512                 } else {
 513                         fputc('\n',stderr);
 514                         col = 0;
 515                 }
 516
 517         }
 518 #endif
 519         if(col != 0)
 520                 fputc('\n',stderr);
 521 }
 522
 523 /*-----------------------------------------------------------------*
 524 *
 525 *-----------------------------------------------------------------*/
 526 PIC_device *init_pic(char *pic_type)
 527 {
 528         char long_name[PIC14_STRING_LEN];
 529
 530         pic = find_device(pic_type);
 531
 532         if (pic == NULL) {
 533                 /* check for shortened "16xxx" form */
 534                 sprintf(long_name, "16%s", pic_type);
 535                 pic = find_device(long_name);
 536                 if (pic == NULL) {
 537                         if(pic_type != NULL && pic_type[0] != '\0')
 538                                 fprintf(stderr, "'%s' was not found.\n", pic_type);
 539                         else
 540                                 fprintf(stderr, "No processor has been specified (use -pPROCESSOR_NAME)\n");
 541
 542                         list_valid_pics(7);
 543                         exit(1);
 544                 }
 545         }
 546         return pic;
 547 }
 548
 549 /*-----------------------------------------------------------------*
 550 *
 551 *-----------------------------------------------------------------*/
 552 int picIsInitialized(void)
 553 {
 554         if(pic && maxRAMaddress > 0)
 555                 return 1;
 556
 557         return 0;
 558
 559 }
 560
 561 /*-----------------------------------------------------------------*
 562 *  char *processor_base_name(void) - Include file is derived from this.
 563 *-----------------------------------------------------------------*/
 564 char *processor_base_name(void)
 565 {
 566
 567         if(!pic)
 568                 return NULL;
 569
 570         return pic->name;
 571 }
 572
 573 /*-----------------------------------------------------------------*
 574 *-----------------------------------------------------------------*/
 575 int validAddress(int address, int reg_size)
 576 {
 577         if (maxRAMaddress < 0) {
 578                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 579                 return 0;
 580         }
 581         //  fprintf(stderr, "validAddress: Checking 0x%04x\n",address);
 582         assert (reg_size > 0);
 583         if(address + (reg_size - 1) > maxRAMaddress)
 584                 return 0;
 585
 586         return 1;
 587 }
 588
 589 #if 0
 590 /* The following code should be (and is) implemented in the linker. */
 591
 592 /*-----------------------------------------------------------------*
 593 *-----------------------------------------------------------------*/
 594 void mapRegister(regs *reg)
 595 {
 596
 597         unsigned i;
 598         int alias;
 599
 600         if(!reg || !reg->size) {
 601                 fprintf(stderr,"WARNING: %s:%s:%d Bad register\n",__FILE__,__FUNCTION__,__LINE__);
 602                 return;
 603         }
 604
 605         if (maxRAMaddress < 0) {
 606                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 607                 return;
 608         }
 609
 610         for(i=0; i<reg->size; i++) {
 611
 612                 assert(reg->address >= 0 && reg->address < maxRAMaddress);
 613
 614                 alias = finalMapping[reg->address].alias;
 615                 reg->alias = alias;
 616
 617                 do {
 618
 619                         //fprintf(stdout,"mapping %s to address 0x%02x, reg size = %d\n",reg->name, (reg->address+alias+i),reg->size);
 620
 621                         finalMapping[reg->address + alias + i].reg = reg;
 622                         finalMapping[reg->address + alias + i].instance = i;
 623
 624                         /* Decrement alias */
 625                         if(alias)
 626                                 alias -= ((alias & (alias - 1)) ^ alias);
 627                         else
 628                                 alias--;
 629
 630                 } while (alias>=0);
 631         }
 632
 633         //fprintf(stderr,"%s - %s addr = 0x%03x, size %d\n",__FUNCTION__,reg->name, reg->address,reg->size);
 634
 635         reg->isMapped = 1;
 636
 637 }
 638
 639 /*-----------------------------------------------------------------*
 640 *-----------------------------------------------------------------*/
 641 int assignRegister(regs *reg, int start_address)
 642 {
 643         int i;
 644
 645         //fprintf(stderr,"%s -  %s start_address = 0x%03x\n",__FUNCTION__,reg->name, start_address);
 646         if(reg->isFixed) {
 647
 648                 if (validAddress(reg->address,reg->size)) {
 649                         //fprintf(stderr,"%s -  %s address = 0x%03x\n",__FUNCTION__,reg->name, reg->address);
 650                         mapRegister(reg);
 651                         return reg->address;
 652                 }
 653
 654                 if (getenv("SDCCPICDEBUG")) {
 655                         fprintf(stderr, "WARNING: Ignoring Out of Range register assignment at fixed address %d, %s\n",
 656                             reg->address, reg->name);
 657                 }
 658
 659         } else {
 660
 661         /* This register does not have a fixed address requirement
 662         * so we'll search through all availble ram address and
 663                 * assign the first one */
 664
 665                 for (i=start_address; i<=maxRAMaddress; i++) {
 666
 667                         if (validAddress(i,reg->size)) {
 668                                 reg->address = i;
 669                                 mapRegister(reg);
 670                                 return i;
 671                         }
 672                 }
 673
 674                 fprintf(stderr, "WARNING: No more RAM available for %s\n",reg->name);
 675
 676         }
 677
 678         return -1;
 679 }
 680
 681 /*-----------------------------------------------------------------*
 682 *-----------------------------------------------------------------*/
 683 void assignFixedRegisters(set *regset)
 684 {
 685         regs *reg;
 686
 687         for (reg = setFirstItem(regset) ; reg ;
 688         reg = setNextItem(regset)) {
 689
 690                 if(reg->isFixed)
 691                         assignRegister(reg,0);
 692         }
 693
 694 }
 695
 696 /*-----------------------------------------------------------------*
 697 *-----------------------------------------------------------------*/
 698 void assignRelocatableRegisters(set *regset, int used)
 699 {
 700
 701         regs *reg;
 702         int address = 0;
 703
 704         for (reg = setFirstItem(regset) ; reg ;
 705         reg = setNextItem(regset)) {
 706
 707                 //fprintf(stdout,"assigning %s (%d) isFixed=%d, wasUsed=%d\n",reg->name,reg->size,reg->isFixed,reg->wasUsed);
 708
 709                 if((!reg->isExtern) && (!reg->isFixed) && ( used || reg->wasUsed)) {
 710                         /* If register have been reused then shall not print it a second time. */
 711                         set *s;
 712                         int done = 0;
 713                         for (s = regset; s; s = s->next) {
 714                                 regs *r;
 715                                 r = s->item;
 716                                 if (r == reg)
 717                                         break;
 718                                 if((!r->isFixed) && ( used || r->wasUsed)) {
 719                                         if (r->rIdx == reg->rIdx) {
 720                                                 reg->address = r->address;
 721                                                 done = 1;
 722                                                 break;
 723                                         }
 724                                 }
 725                         }
 726                         if (!done)
 727                                 address = assignRegister(reg,address);
 728                 }
 729         }
 730
 731 }
 732 #endif
 733
 734 /* Keep track of whether we found an assignment to the __config words. */
 735 static int pic14_hasSetConfigWord = 0;
 736
 737 /*-----------------------------------------------------------------*
 738  *  void assignConfigWordValue(int address, int value)
 739  *
 740  * Most midrange PICs have one config word at address 0x2007.
 741  * Newer PIC14s have a second config word at address 0x2008.
 742  * This routine will assign values to those addresses.
 743  *
 744  *-----------------------------------------------------------------*/
 745
 746 void pic14_assignConfigWordValue(int address, int value)
 747 {
 748         if (CONFIG_WORD_ADDRESS == address)
 749                 config_word = value;
 750
 751         else if (CONFIG2_WORD_ADDRESS == address)
 752                 config2_word = value;
 753
 754         //fprintf(stderr,"setting config word 0x%x to 0x%x\n", address, value);
 755         pic14_hasSetConfigWord = 1;
 756 }
 757
 758 /*-----------------------------------------------------------------*
 759  * int pic14_emitConfigWord (FILE * vFile)
 760  *
 761  * Emit the __config directives iff we found a previous assignment
 762  * to the config word.
 763  *-----------------------------------------------------------------*/
 764 extern char *iComments2;
 765 int pic14_emitConfigWord (FILE * vFile)
 766 {
 767   if (pic14_hasSetConfigWord)
 768   {
 769     fprintf (vFile, "%s", iComments2);
 770     fprintf (vFile, "; config word \n");
 771     fprintf (vFile, "%s", iComments2);
 772     if (pic14_getHasSecondConfigReg())
 773     {
 774       fprintf (vFile, "\t__config _CONFIG1, 0x%x\n", pic14_getConfigWord(0x2007));
 775       fprintf (vFile, "\t__config _CONFIG2, 0x%x\n", pic14_getConfigWord(0x2008));
 776     }
 777     else
 778       fprintf (vFile, "\t__config 0x%x\n", pic14_getConfigWord(0x2007));
 779
 780     return 1;
 781   }
 782   return 0;
 783 }
 784
 785 /*-----------------------------------------------------------------*
 786  * int pic14_getConfigWord(int address)
 787  *
 788  * Get the current value of a config word.
 789  *
 790  *-----------------------------------------------------------------*/
 791
 792 int pic14_getConfigWord(int address)
 793 {
 794         switch (address)
 795         {
 796         case CONFIG_WORD_ADDRESS:
 797                 return config_word;
 798
 799         case CONFIG2_WORD_ADDRESS:
 800                 return config2_word;
 801
 802         default:
 803                 return 0;
 804         }
 805 }
 806
 807 /*-----------------------------------------------------------------*
 808 *
 809 *-----------------------------------------------------------------*/
 810 unsigned pic14_getMaxRam(void)
 811 {
 812         return pic->defMaxRAMaddrs;
 813 }
 814
 815
 816 /*-----------------------------------------------------------------*
 817 *  int getHasSecondConfigReg(void) - check if the device has a
 818 *  second config register, rather than just one.
 819 *-----------------------------------------------------------------*/
 820 int pic14_getHasSecondConfigReg(void)
 821 {
 822         if(!pic)
 823                 return 0;
 824         else
 825                 return pic->hasSecondConfigReg;
 826 }
 827
 828 /*-----------------------------------------------------------------*
 829  * True iff the device has memory aliased in every bank.
 830  * If true, low and high will be set to the low and high address
 831  * occupied by the (last) sharebank found.
 832  *-----------------------------------------------------------------*/
 833 int pic14_hasSharebank(int *low, int *high, int *size)
 834 {
 835         memRange *r;
 836
 837         assert(pic);
 838         r = pic->ram;
 839
 840         while (r) {
 841             //fprintf (stderr, "%s: region %x..%x, bank %x, alias %x, pic->bankmask %x, min_size %d\n",  __FUNCTION__, r->start_address, r->end_address, r->bank, r->alias, pic->bankMask, size ? *size : 0);
 842             // find sufficiently large shared region
 843             if ((r->alias == pic->bankMask)
 844                     && (r->end_address != r->start_address) // ignore SFRs
 845                     && (!size || (*size <= (r->end_address - r->start_address + 1))))
 846             {
 847                 if (low) *low = r->start_address;
 848                 if (high) *high = r->end_address;
 849                 if (size) *size = r->end_address - r->start_address + 1;
 850                 return 1;
 851             } // if
 852             r = r->next;
 853         } // while
 854
 855         if (low) *low = 0x0;
 856         if (high) *high = 0x0;
 857         if (size) *size = 0x0;
 858         //fprintf (stderr, "%s: no shared bank found\n", __FUNCTION__);
 859         return 0;
 860 }
 861
 862 /*
 863  * True iff the memory region [low, high] is aliased in all banks.
 864  */
 865 int pic14_isShared(int low, int high)
 866 {
 867         memRange *r;
 868
 869         assert(pic);
 870         r = pic->ram;
 871
 872         while (r) {
 873             //fprintf (stderr, "%s: region %x..%x, bank %x, alias %x, pic->bankmask %x\n", __FUNCTION__, r->start_address, r->end_address, r->bank, r->alias, pic->bankMask);
 874             if ((r->alias == pic->bankMask) && (r->start_address <= low) && (r->end_address >= high)) {
 875                 return 1;
 876             } // if
 877             r = r->next;
 878         } // while
 879
 880         return 0;
 881 }
 882
 883 /*
 884  * True iff all RAM is aliased in all banks (no BANKSELs required except for
 885  * SFRs).
 886  */
 887 int pic14_allRAMShared(void)
 888 {
 889         memRange *r;
 890
 891         assert(pic);
 892         r = pic->ram;
 893
 894         while (r) {
 895             if (r->alias != pic->bankMask) return 0;
 896             r = r->next;
 897         } // while
 898
 899         return 1;
 900 }
 901
 902 /*
 903  * True iff the pseudo stack is a sharebank --> let linker place it.
 904  * [low, high] denotes a size byte long block of (shared or banked)
 905  * memory to be used.
 906  */
 907 int pic14_getSharedStack(int *low, int *high, int *size)
 908 {
 909     int haveShared;
 910     int l, h, s;
 911
 912     s = options.stack_size ? options.stack_size : 0x10;
 913     haveShared = pic14_hasSharebank(&l, &h, &s);
 914     if ((options.stack_loc != 0) || !haveShared)
 915     {
 916         // sharebank not available or not to be used
 917         s = options.stack_size ? options.stack_size : 0x10;
 918         l = options.stack_loc ? options.stack_loc : 0x20;
 919         h = l + s - 1;
 920         if (low) *low = l;
 921         if (high) *high = h;
 922         if (size) *size = s;
 923         // return 1 iff [low, high] is present in all banks
 924         //fprintf(stderr, "%s: low %x, high %x, size %x, shared %d\n", __FUNCTION__, l, h, s, pic14_isShared(l, h));
 925         return (pic14_isShared(l, h));
 926     } else {
 927         // sharebanks available for use by the stack
 928         if (options.stack_size) s = options.stack_size;
 929         else if (!s || s > 16) s = 16; // limit stack to 16 bytes in SHAREBANK
 930
 931         // provide addresses for sharebank
 932         if (low) *low = l;
 933         if (high) *high = l + s - 1;
 934         if (size) *size = s;
 935         //fprintf(stderr, "%s: low %x, high %x, size %x, shared 1\n", __FUNCTION__, l, h, s);
 936         return 1;
 937     }
 938 }
 939
 940 PIC_device * pic14_getPIC(void)
 941 {
 942     return pic;
 943 }