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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
 197  * for a processor 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(userIncDirsSet);
 228                 !pic_file && dir;
 229                 dir = setNextItem(userIncDirsSet))
 230         {
 231           //fprintf( stderr, "searching1 %s\n", dir );
 232           SNPRINTF(&filename[0], len, "%s%s", dir,
 233             DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 234           pic_file = fopen( filename, "rt" );
 235           if (pic_file) break;
 236         } // for
 237
 238         for (dir = setFirstItem(includeDirsSet);
 239                 !pic_file && dir;
 240                 dir = setNextItem(includeDirsSet))
 241         {
 242           //fprintf( stderr, "searching2 %s\n", dir );
 243           SNPRINTF(&filename[0], len, "%s%s", dir,
 244             DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 245           pic_file = fopen( filename, "rt" );
 246           if (pic_file) break;
 247         } // for
 248
 249         for (dir = setFirstItem(libDirsSet);
 250                 !pic_file && dir;
 251                 dir = setNextItem(libDirsSet))
 252         {
 253           //fprintf( stderr, "searching3 %s\n", dir );
 254           SNPRINTF(&filename[0], len, "%s%s", dir,
 255             DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 256           pic_file = fopen( filename, "rt" );
 257           if (pic_file) break;
 258         } // for
 259
 260         for (dir = setFirstItem(libPathsSet);
 261                 !pic_file && dir;
 262                 dir = setNextItem(libPathsSet))
 263         {
 264           //fprintf( stderr, "searching4 %s\n", dir );
 265           SNPRINTF(&filename[0], len, "%s%s", dir,
 266             DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 267           pic_file = fopen( filename, "rt" );
 268           if (pic_file) break;
 269         } // for
 270
 271         if (!pic_file) {
 272           SNPRINTF(&filename[0], len, "%s",
 273             DATADIR LIB_DIR_SUFFIX
 274             DIR_SEPARATOR_STRING "pic"
 275             DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 276           pic_file = fopen( filename, "rt" );
 277         } // if
 278
 279         if (pic_file == NULL) {
 280             fprintf(stderr, "can't find %s\n", DEVICE_FILE_NAME);
 281             return NULL;
 282         } // if
 283
 284         if (options.verbose) {
 285             printf ("Using devices from %s.\n", filename);
 286         } // if
 287
 288         /* read line by line */
 289         pic_buf[sizeof(pic_buf)-1] = '\0';
 290         while (fgets(pic_buf, sizeof(pic_buf)-1, pic_file) != NULL && !done) {
 291                 unsigned llen;
 292                 llen = strlen (pic_buf);
 293
 294                 /* remove trailing spaces */
 295                 while (llen && isspace(pic_buf[llen-1])) {
 296                         pic_buf[llen-1] = '\0';
 297                         llen--;
 298                 }
 299
 300                 /* remove leading spaces */
 301                 for (pic_buf_pos = pic_buf; isspace(*pic_buf_pos); pic_buf_pos++)
 302                 {}
 303
 304                 /* ignore comment / empty lines */
 305                 if (*pic_buf_pos != '\0' && *pic_buf_pos != '#') {
 306
 307                         /* split into fields */
 308                         char pic_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
 309                         int num_pic_words;
 310                         int wcount;
 311
 312                         num_pic_words = split_words(pic_word, pic_buf_pos);
 313
 314                         if (STRCASECMP(pic_word[0], "processor") == 0) {
 315
 316                                 if (pic_name == NULL) {
 317                                         /* this is the mode where we read all the processors in - store the names for now */
 318                                         if (num_processor_names > 0) {
 319                                                 /* store away all the previous processor definitions */
 320                                                 int dcount;
 321
 322                                                 for (dcount = 1; dcount < num_processor_names; dcount++)
 323                                                         create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
 324                                                                    pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 325                                         }
 326
 327                                         num_processor_names = split_words(processor_name, pic_buf_pos);
 328                                 }
 329                                 else {
 330                                         /* if we've just completed reading a processor definition stop now */
 331                                         if (found_processor)
 332                                                 done = TRUE;
 333                                         else {
 334                                                 /* check if this processor name is a match */
 335                                                 for (wcount = 1; wcount < num_pic_words; wcount++) {
 336
 337                                                         /* skip uninteresting prefixes */
 338                                                         char *found_name = sanitise_processor_name(pic_word[wcount]);
 339
 340                                                         if (STRCASECMP(found_name, simple_pic_name) == 0)
 341                                                                 found_processor = TRUE;
 342                                                 }
 343                                         }
 344                                 }
 345                         }
 346
 347                         else {
 348                                 if (found_processor || pic_name == NULL) {
 349                                         /* only parse a processor section if we've found the one we want */
 350                                         if (STRCASECMP(pic_word[0], "maxram") == 0 && num_pic_words > 1) {
 351                                                 pic_maxram = parse_config_value(pic_word[1]);
 352                                                 setMaxRAM(pic_maxram);
 353                                         }
 354                                         else if (STRCASECMP(pic_word[0], "bankmsk") == 0 && num_pic_words > 1)
 355                                                 pic_bankmsk = parse_config_value(pic_word[1]);
 356
 357                                         else if (STRCASECMP(pic_word[0], "confsiz") == 0 && num_pic_words > 1)
 358                                                 pic_confsiz = parse_config_value(pic_word[1]);
 359
 360                                         else if (STRCASECMP(pic_word[0], "program") == 0 && num_pic_words > 1)
 361                                                 pic_program = parse_config_value(pic_word[1]);
 362
 363                                         else if (STRCASECMP(pic_word[0], "data") == 0 && num_pic_words > 1)
 364                                                 pic_data = parse_config_value(pic_word[1]);
 365
 366                                         else if (STRCASECMP(pic_word[0], "eeprom") == 0 && num_pic_words > 1)
 367                                                 pic_eeprom = parse_config_value(pic_word[1]);
 368
 369                                         else if (STRCASECMP(pic_word[0], "io") == 0 && num_pic_words > 1)
 370                                                 pic_io = parse_config_value(pic_word[1]);
 371
 372                                         else if (STRCASECMP(pic_word[0], "regmap") == 0 && num_pic_words > 2) {
 373                                                 if (found_processor)
 374                                                         register_map(num_pic_words, pic_word);
 375                                         }
 376                                         else if (STRCASECMP(pic_word[0], "memmap") == 0 && num_pic_words > 2) {
 377                                                 if (found_processor)
 378                                                         ram_map(num_pic_words, pic_word);
 379                                         }
 380                                         else {
 381                                                 fprintf(stderr, "WARNING: %s: bad syntax `%s'\n", DEVICE_FILE_NAME, pic_word[0]);
 382                                         }
 383                                 }
 384                         }
 385                 }
 386         }
 387
 388         fclose(pic_file);
 389
 390         /* if we're in read-the-lot mode then create the final processor definition */
 391         if (pic_name == NULL) {
 392
 393                 if (num_processor_names > 0) {
 394                         /* store away all the previous processor definitions */
 395                         int dcount;
 396
 397                         for (dcount = 1; dcount < num_processor_names; dcount++)
 398                                 create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
 399                                            pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 400                 }
 401         }
 402         else {
 403                 /* in search mode */
 404                 if (found_processor) {
 405                         /* create a new pic entry */
 406                         return create_pic(pic_name, pic_maxram, pic_bankmsk,
 407                                           pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 408                 }
 409         }
 410
 411         return NULL;
 412 }
 413
 414 void setMaxRAM(int size)
 415 {
 416         maxRAMaddress = size;
 417
 418         if (maxRAMaddress < 0) {
 419                 fprintf(stderr, "invalid maxram 0x%x setting in %s\n",
 420                         maxRAMaddress, DEVICE_FILE_NAME);
 421                 return;
 422         }
 423 }
 424
 425 /*-----------------------------------------------------------------*
 426 *-----------------------------------------------------------------*/
 427
 428 int isREGinBank(regs *reg, int bank)
 429 {
 430
 431         if(!reg || !pic)
 432                 return 0;
 433
 434         if((int)((reg->address | reg->alias) & pic->bankMask & bank) == bank)
 435                 return 1;
 436
 437         return 0;
 438 }
 439
 440 /*-----------------------------------------------------------------*
 441 *-----------------------------------------------------------------*/
 442 int REGallBanks(regs *reg)
 443 {
 444
 445         if(!reg || !pic)
 446                 return 0;
 447
 448         return ((reg->address | reg->alias) & pic->bankMask);
 449
 450 }
 451
 452 /*-----------------------------------------------------------------*
 453  *  void list_valid_pics(int ncols, int list_alias)
 454  *
 455  * Print out a formatted list of valid PIC devices
 456  *
 457  * ncols - number of columns in the list.
 458  *
 459  * list_alias - if non-zero, print all of the supported aliases
 460  *              for a device (e.g. F84, 16F84, etc...)
 461  *-----------------------------------------------------------------*/
 462 void list_valid_pics(int ncols)
 463 {
 464         int col=0,longest;
 465         int i,k,l;
 466
 467         if (num_of_supported_PICS == 0)
 468                 find_device(NULL);          /* load all the definitions */
 469
 470         /* decrement the column number if it's greater than zero */
 471         ncols = (ncols > 1) ? ncols-1 : 4;
 472
 473         /* Find the device with the longest name */
 474         for(i=0,longest=0; i<num_of_supported_PICS; i++) {
 475                 k = strlen(Pics[i]->name);
 476                 if(k>longest)
 477                         longest = k;
 478         }
 479
 480 #if 1
 481         /* heading */
 482         fprintf(stderr, "\nPIC14 processors and their characteristics:\n\n");
 483         fprintf(stderr, " processor");
 484         for(k=0; k<longest-1; k++)
 485                 fputc(' ',stderr);
 486         fprintf(stderr, "program     RAM      EEPROM    I/O\n");
 487         fprintf(stderr, "-----------------------------------------------------\n");
 488
 489         for(i=0;  i < num_of_supported_PICS; i++) {
 490                 fprintf(stderr,"  %s", Pics[i]->name);
 491                 l = longest + 2 - strlen(Pics[i]->name);
 492                 for(k=0; k<l; k++)
 493                         fputc(' ',stderr);
 494
 495                 fprintf(stderr, "     ");
 496                 if (Pics[i]->programMemSize % 1024 == 0)
 497                         fprintf(stderr, "%4dK", Pics[i]->programMemSize / 1024);
 498                 else
 499                         fprintf(stderr, "%5d", Pics[i]->programMemSize);
 500
 501                 fprintf(stderr, "     %5d     %5d     %4d\n",
 502                         Pics[i]->dataMemSize, Pics[i]->eepromMemSize, Pics[i]->ioPins);
 503         }
 504
 505         col = 0;
 506
 507         fprintf(stderr, "\nPIC14 processors supported:\n");
 508         for(i=0;  i < num_of_supported_PICS; i++) {
 509
 510                 fprintf(stderr,"%s", Pics[i]->name);
 511                 if(col<ncols) {
 512                         l = longest + 2 - strlen(Pics[i]->name);
 513                         for(k=0; k<l; k++)
 514                                 fputc(' ',stderr);
 515
 516                         col++;
 517
 518                 } else {
 519                         fputc('\n',stderr);
 520                         col = 0;
 521                 }
 522
 523         }
 524 #endif
 525         if(col != 0)
 526                 fputc('\n',stderr);
 527 }
 528
 529 /*-----------------------------------------------------------------*
 530 *
 531 *-----------------------------------------------------------------*/
 532 PIC_device *init_pic(char *pic_type)
 533 {
 534         char long_name[PIC14_STRING_LEN];
 535
 536         pic = find_device(pic_type);
 537
 538         if (pic == NULL) {
 539                 /* check for shortened "16xxx" form */
 540                 sprintf(long_name, "16%s", pic_type);
 541                 pic = find_device(long_name);
 542                 if (pic == NULL) {
 543                         if(pic_type != NULL && pic_type[0] != '\0')
 544                                 fprintf(stderr, "'%s' was not found.\n", pic_type);
 545                         else
 546                                 fprintf(stderr, "No processor has been specified (use -pPROCESSOR_NAME)\n");
 547
 548                         list_valid_pics(7);
 549                         exit(1);
 550                 }
 551         }
 552         return pic;
 553 }
 554
 555 /*-----------------------------------------------------------------*
 556 *
 557 *-----------------------------------------------------------------*/
 558 int picIsInitialized(void)
 559 {
 560         if(pic && maxRAMaddress > 0)
 561                 return 1;
 562
 563         return 0;
 564
 565 }
 566
 567 /*-----------------------------------------------------------------*
 568 *  char *processor_base_name(void) - Include file is derived from this.
 569 *-----------------------------------------------------------------*/
 570 char *processor_base_name(void)
 571 {
 572
 573         if(!pic)
 574                 return NULL;
 575
 576         return pic->name;
 577 }
 578
 579 /*-----------------------------------------------------------------*
 580 *-----------------------------------------------------------------*/
 581 int validAddress(int address, int reg_size)
 582 {
 583         if (maxRAMaddress < 0) {
 584                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 585                 return 0;
 586         }
 587         //  fprintf(stderr, "validAddress: Checking 0x%04x\n",address);
 588         assert (reg_size > 0);
 589         if(address + (reg_size - 1) > maxRAMaddress)
 590                 return 0;
 591
 592         return 1;
 593 }
 594
 595 #if 0
 596 /* The following code should be (and is) implemented in the linker. */
 597
 598 /*-----------------------------------------------------------------*
 599 *-----------------------------------------------------------------*/
 600 void mapRegister(regs *reg)
 601 {
 602
 603         unsigned i;
 604         int alias;
 605
 606         if(!reg || !reg->size) {
 607                 fprintf(stderr,"WARNING: %s:%s:%d Bad register\n",__FILE__,__FUNCTION__,__LINE__);
 608                 return;
 609         }
 610
 611         if (maxRAMaddress < 0) {
 612                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 613                 return;
 614         }
 615
 616         for(i=0; i<reg->size; i++) {
 617
 618                 assert(reg->address >= 0 && reg->address < maxRAMaddress);
 619
 620                 alias = finalMapping[reg->address].alias;
 621                 reg->alias = alias;
 622
 623                 do {
 624
 625                         //fprintf(stdout,"mapping %s to address 0x%02x, reg size = %d\n",reg->name, (reg->address+alias+i),reg->size);
 626
 627                         finalMapping[reg->address + alias + i].reg = reg;
 628                         finalMapping[reg->address + alias + i].instance = i;
 629
 630                         /* Decrement alias */
 631                         if(alias)
 632                                 alias -= ((alias & (alias - 1)) ^ alias);
 633                         else
 634                                 alias--;
 635
 636                 } while (alias>=0);
 637         }
 638
 639         //fprintf(stderr,"%s - %s addr = 0x%03x, size %d\n",__FUNCTION__,reg->name, reg->address,reg->size);
 640
 641         reg->isMapped = 1;
 642
 643 }
 644
 645 /*-----------------------------------------------------------------*
 646 *-----------------------------------------------------------------*/
 647 int assignRegister(regs *reg, int start_address)
 648 {
 649         int i;
 650
 651         //fprintf(stderr,"%s -  %s start_address = 0x%03x\n",__FUNCTION__,reg->name, start_address);
 652         if(reg->isFixed) {
 653
 654                 if (validAddress(reg->address,reg->size)) {
 655                         //fprintf(stderr,"%s -  %s address = 0x%03x\n",__FUNCTION__,reg->name, reg->address);
 656                         mapRegister(reg);
 657                         return reg->address;
 658                 }
 659
 660                 if (getenv("SDCCPICDEBUG")) {
 661                         fprintf(stderr, "WARNING: Ignoring Out of Range register assignment at fixed address %d, %s\n",
 662                             reg->address, reg->name);
 663                 }
 664
 665         } else {
 666
 667         /* This register does not have a fixed address requirement
 668         * so we'll search through all availble ram address and
 669                 * assign the first one */
 670
 671                 for (i=start_address; i<=maxRAMaddress; i++) {
 672
 673                         if (validAddress(i,reg->size)) {
 674                                 reg->address = i;
 675                                 mapRegister(reg);
 676                                 return i;
 677                         }
 678                 }
 679
 680                 fprintf(stderr, "WARNING: No more RAM available for %s\n",reg->name);
 681
 682         }
 683
 684         return -1;
 685 }
 686
 687 /*-----------------------------------------------------------------*
 688 *-----------------------------------------------------------------*/
 689 void assignFixedRegisters(set *regset)
 690 {
 691         regs *reg;
 692
 693         for (reg = setFirstItem(regset) ; reg ;
 694         reg = setNextItem(regset)) {
 695
 696                 if(reg->isFixed)
 697                         assignRegister(reg,0);
 698         }
 699
 700 }
 701
 702 /*-----------------------------------------------------------------*
 703 *-----------------------------------------------------------------*/
 704 void assignRelocatableRegisters(set *regset, int used)
 705 {
 706
 707         regs *reg;
 708         int address = 0;
 709
 710         for (reg = setFirstItem(regset) ; reg ;
 711         reg = setNextItem(regset)) {
 712
 713                 //fprintf(stdout,"assigning %s (%d) isFixed=%d, wasUsed=%d\n",reg->name,reg->size,reg->isFixed,reg->wasUsed);
 714
 715                 if((!reg->isExtern) && (!reg->isFixed) && ( used || reg->wasUsed)) {
 716                         /* If register have been reused then shall not print it a second time. */
 717                         set *s;
 718                         int done = 0;
 719                         for (s = regset; s; s = s->next) {
 720                                 regs *r;
 721                                 r = s->item;
 722                                 if (r == reg)
 723                                         break;
 724                                 if((!r->isFixed) && ( used || r->wasUsed)) {
 725                                         if (r->rIdx == reg->rIdx) {
 726                                                 reg->address = r->address;
 727                                                 done = 1;
 728                                                 break;
 729                                         }
 730                                 }
 731                         }
 732                         if (!done)
 733                                 address = assignRegister(reg,address);
 734                 }
 735         }
 736
 737 }
 738 #endif
 739
 740 /* Keep track of whether we found an assignment to the __config words. */
 741 static int pic14_hasSetConfigWord = 0;
 742
 743 /*-----------------------------------------------------------------*
 744  *  void assignConfigWordValue(int address, int value)
 745  *
 746  * Most midrange PICs have one config word at address 0x2007.
 747  * Newer PIC14s have a second config word at address 0x2008.
 748  * This routine will assign values to those addresses.
 749  *
 750  *-----------------------------------------------------------------*/
 751
 752 void pic14_assignConfigWordValue(int address, int value)
 753 {
 754         if (CONFIG_WORD_ADDRESS == address)
 755                 config_word = value;
 756
 757         else if (CONFIG2_WORD_ADDRESS == address)
 758                 config2_word = value;
 759
 760         //fprintf(stderr,"setting config word 0x%x to 0x%x\n", address, value);
 761         pic14_hasSetConfigWord = 1;
 762 }
 763
 764 /*-----------------------------------------------------------------*
 765  * int pic14_emitConfigWord (FILE * vFile)
 766  *
 767  * Emit the __config directives iff we found a previous assignment
 768  * to the config word.
 769  *-----------------------------------------------------------------*/
 770 extern char *iComments2;
 771 int pic14_emitConfigWord (FILE * vFile)
 772 {
 773   if (pic14_hasSetConfigWord)
 774   {
 775     fprintf (vFile, "%s", iComments2);
 776     fprintf (vFile, "; config word \n");
 777     fprintf (vFile, "%s", iComments2);
 778     if (pic14_getHasSecondConfigReg())
 779     {
 780       fprintf (vFile, "\t__config _CONFIG1, 0x%x\n", pic14_getConfigWord(0x2007));
 781       fprintf (vFile, "\t__config _CONFIG2, 0x%x\n", pic14_getConfigWord(0x2008));
 782     }
 783     else
 784       fprintf (vFile, "\t__config 0x%x\n", pic14_getConfigWord(0x2007));
 785
 786     return 1;
 787   }
 788   return 0;
 789 }
 790
 791 /*-----------------------------------------------------------------*
 792  * int pic14_getConfigWord(int address)
 793  *
 794  * Get the current value of a config word.
 795  *
 796  *-----------------------------------------------------------------*/
 797
 798 int pic14_getConfigWord(int address)
 799 {
 800         switch (address)
 801         {
 802         case CONFIG_WORD_ADDRESS:
 803                 return config_word;
 804
 805         case CONFIG2_WORD_ADDRESS:
 806                 return config2_word;
 807
 808         default:
 809                 return 0;
 810         }
 811 }
 812
 813 /*-----------------------------------------------------------------*
 814 *
 815 *-----------------------------------------------------------------*/
 816 unsigned pic14_getMaxRam(void)
 817 {
 818         return pic->defMaxRAMaddrs;
 819 }
 820
 821
 822 /*-----------------------------------------------------------------*
 823 *  int getHasSecondConfigReg(void) - check if the device has a
 824 *  second config register, rather than just one.
 825 *-----------------------------------------------------------------*/
 826 int pic14_getHasSecondConfigReg(void)
 827 {
 828         if(!pic)
 829                 return 0;
 830         else
 831                 return pic->hasSecondConfigReg;
 832 }
 833
 834 /*-----------------------------------------------------------------*
 835  * True iff the device has memory aliased in every bank.
 836  * If true, low and high will be set to the low and high address
 837  * occupied by the (last) sharebank found.
 838  *-----------------------------------------------------------------*/
 839 int pic14_hasSharebank(int *low, int *high, int *size)
 840 {
 841         memRange *r;
 842
 843         assert(pic);
 844         r = pic->ram;
 845
 846         while (r) {
 847             //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);
 848             // find sufficiently large shared region
 849             if ((r->alias == pic->bankMask)
 850                     && (r->end_address != r->start_address) // ignore SFRs
 851                     && (!size || (*size <= (r->end_address - r->start_address + 1))))
 852             {
 853                 if (low) *low = r->start_address;
 854                 if (high) *high = r->end_address;
 855                 if (size) *size = r->end_address - r->start_address + 1;
 856                 return 1;
 857             } // if
 858             r = r->next;
 859         } // while
 860
 861         if (low) *low = 0x0;
 862         if (high) *high = 0x0;
 863         if (size) *size = 0x0;
 864         //fprintf (stderr, "%s: no shared bank found\n", __FUNCTION__);
 865         return 0;
 866 }
 867
 868 /*
 869  * True iff the memory region [low, high] is aliased in all banks.
 870  */
 871 int pic14_isShared(int low, int high)
 872 {
 873         memRange *r;
 874
 875         assert(pic);
 876         r = pic->ram;
 877
 878         while (r) {
 879             //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);
 880             if ((r->alias == pic->bankMask) && (r->start_address <= low) && (r->end_address >= high)) {
 881                 return 1;
 882             } // if
 883             r = r->next;
 884         } // while
 885
 886         return 0;
 887 }
 888
 889 /*
 890  * True iff all RAM is aliased in all banks (no BANKSELs required except for
 891  * SFRs).
 892  */
 893 int pic14_allRAMShared(void)
 894 {
 895         memRange *r;
 896
 897         assert(pic);
 898         r = pic->ram;
 899
 900         while (r) {
 901             if (r->alias != pic->bankMask) return 0;
 902             r = r->next;
 903         } // while
 904
 905         return 1;
 906 }
 907
 908 /*
 909  * True iff the pseudo stack is a sharebank --> let linker place it.
 910  * [low, high] denotes a size byte long block of (shared or banked)
 911  * memory to be used.
 912  */
 913 int pic14_getSharedStack(int *low, int *high, int *size)
 914 {
 915     int haveShared;
 916     int l, h, s;
 917
 918     s = options.stack_size ? options.stack_size : 0x10;
 919     haveShared = pic14_hasSharebank(&l, &h, &s);
 920     if ((options.stack_loc != 0) || !haveShared)
 921     {
 922         // sharebank not available or not to be used
 923         s = options.stack_size ? options.stack_size : 0x10;
 924         l = options.stack_loc ? options.stack_loc : 0x20;
 925         h = l + s - 1;
 926         if (low) *low = l;
 927         if (high) *high = h;
 928         if (size) *size = s;
 929         // return 1 iff [low, high] is present in all banks
 930         //fprintf(stderr, "%s: low %x, high %x, size %x, shared %d\n", __FUNCTION__, l, h, s, pic14_isShared(l, h));
 931         return (pic14_isShared(l, h));
 932     } else {
 933         // sharebanks available for use by the stack
 934         if (options.stack_size) s = options.stack_size;
 935         else if (!s || s > 16) s = 16; // limit stack to 16 bytes in SHAREBANK
 936
 937         // provide addresses for sharebank
 938         if (low) *low = l;
 939         if (high) *high = l + s - 1;
 940         if (size) *size = s;
 941         //fprintf(stderr, "%s: low %x, high %x, size %x, shared 1\n", __FUNCTION__, l, h, s);
 942         return 1;
 943     }
 944 }
 945
 946 PIC_device * pic14_getPIC(void)
 947 {
 948     return pic;
 949 }