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