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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 AssignedMemory *finalMapping=NULL;
  53
  54 #define CONFIG_WORD_ADDRESS 0x2007
  55 #define CONFIG2_WORD_ADDRESS 0x2008
  56 #define DEFAULT_CONFIG_WORD 0x3fff
  57 #define DEFAULT_CONFIG2_WORD 0x3ffc
  58
  59 #define DEVICE_FILE_NAME "pic14devices.txt"
  60 #define PIC14_STRING_LEN 256
  61 #define SPLIT_WORDS_MAX 16
  62
  63 static unsigned int config_word = DEFAULT_CONFIG_WORD;
  64 static unsigned int config2_word = DEFAULT_CONFIG2_WORD;
  65
  66 extern int pic14_is_shared (regs *reg);
  67 extern void emitSymbolToFile (FILE *of, const char *name, const char *section_type, int size, int addr, int useEQU, int globalize);
  68
  69
  70 /* parse a value from the configuration file */
  71 static int parse_config_value(char *str)
  72 {
  73         if (str[strlen(str) - 1] == 'K')
  74                 return atoi(str) * 1024;        /* like "1K" */
  75
  76         else if (STRNCASECMP(str, "0x", 2) == 0)
  77                 return strtol(str+2, NULL, 16); /* like "0x400" */
  78
  79         else
  80                 return atoi(str);               /* like "1024" */
  81 }
  82
  83
  84 /* split a line into words */
  85 static int split_words(char result_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN], char *str)
  86 {
  87         char *pos = str;
  88         int num_words = 0;
  89         int ccount;
  90
  91         while (*pos != '\0' && num_words < SPLIT_WORDS_MAX) {
  92                 /* remove leading spaces */
  93                 while (isspace(*pos) || *pos == ',')
  94                         pos++;
  95
  96                 /* copy everything up until the first space or comma */
  97                 for (ccount = 0; *pos != '\0' && !isspace(*pos) && *pos != ',' && ccount < PIC14_STRING_LEN-1; ccount++, pos++)
  98                         result_word[num_words][ccount] = *pos;
  99                 result_word[num_words][ccount] = '\0';
 100
 101                 num_words++;
 102         }
 103
 104         return num_words;
 105 }
 106
 107
 108 /* remove annoying prefixes from the processor name */
 109 static char *sanitise_processor_name(char *name)
 110 {
 111         char *proc_pos = name;
 112
 113         if (name == NULL)
 114                 return NULL;
 115
 116         if (STRNCASECMP(proc_pos, "pic16", 5) == 0)
 117                 proc_pos += 5;
 118
 119         else if (STRNCASECMP(proc_pos, "p16", 3) == 0)
 120                 proc_pos += 3;
 121
 122         else if (STRNCASECMP(proc_pos, "16", 2) == 0)
 123                 proc_pos += 2;
 124
 125         return proc_pos;
 126 }
 127
 128
 129 /* create a structure for a pic processor */
 130 static PIC_device *create_pic(char *pic_name, int maxram, int bankmsk, int confsiz, int program, int data, int eeprom, int io)
 131 {
 132         PIC_device *new_pic;
 133         char *simple_pic_name = sanitise_processor_name(pic_name);
 134
 135         new_pic = Safe_calloc(1, sizeof(PIC_device));
 136         new_pic->name[0] = Safe_calloc(strlen(simple_pic_name)+3, sizeof(char));
 137         sprintf(new_pic->name[0], "16%s", simple_pic_name);
 138         new_pic->name[1] = Safe_calloc(strlen(simple_pic_name)+4, sizeof(char));
 139         sprintf(new_pic->name[1], "p16%s", simple_pic_name);
 140         new_pic->name[2] = Safe_calloc(strlen(simple_pic_name)+6, sizeof(char));
 141         sprintf(new_pic->name[2], "pic16%s", simple_pic_name);
 142         new_pic->name[3] = Safe_calloc(strlen(simple_pic_name)+1, sizeof(char));
 143         strcpy(new_pic->name[3], simple_pic_name);
 144
 145         new_pic->defMaxRAMaddrs = maxram;
 146         new_pic->bankMask = bankmsk;
 147         new_pic->hasSecondConfigReg = confsiz > 1;
 148
 149         new_pic->programMemSize = program;
 150         new_pic->dataMemSize = data;
 151         new_pic->eepromMemSize = eeprom;
 152         new_pic->ioPins = io;
 153
 154         Pics[num_of_supported_PICS] = new_pic;
 155         num_of_supported_PICS++;
 156
 157         return new_pic;
 158 }
 159
 160
 161 /* mark some registers as being duplicated across banks */
 162 static void register_map(int num_words, char word[SPLIT_WORDS_MAX][PIC14_STRING_LEN])
 163 {
 164         memRange r;
 165         int pcount;
 166
 167         if (num_words < 3) {
 168                 fprintf(stderr, "WARNING: not enough values in %s regmap directive\n", DEVICE_FILE_NAME);
 169                 return;
 170         }
 171
 172         r.alias = parse_config_value(word[1]);
 173
 174         for (pcount = 2; pcount < num_words; pcount++) {
 175
 176                 r.start_address = parse_config_value(word[pcount]);
 177                 r.end_address = parse_config_value(word[pcount]);
 178                 r.bank = (r.start_address >> 7) & 3;
 179
 180                 addMemRange(&r, 1);
 181         }
 182 }
 183
 184
 185 /* define ram areas - may be duplicated across banks */
 186 static void ram_map(int num_words, char word[SPLIT_WORDS_MAX][PIC14_STRING_LEN])
 187 {
 188         memRange r;
 189
 190         if (num_words < 4) {
 191                 fprintf(stderr, "WARNING: not enough values in %s memmap directive\n", DEVICE_FILE_NAME);
 192                 return;
 193         }
 194
 195         r.start_address = parse_config_value(word[1]);
 196         r.end_address = parse_config_value(word[2]);
 197         r.alias = parse_config_value(word[3]);
 198         r.bank = (r.start_address >> 7) & 3;
 199
 200         addMemRange(&r, 0);
 201 }
 202
 203 extern set *includeDirsSet;
 204 extern set *userIncDirsSet;
 205 extern set *libDirsSet;
 206 extern set *libPathsSet;
 207
 208 /* read the file with all the pic14 definitions and pick out the definition for a processor
 209  * if specified. if pic_name is NULL reads everything */
 210 static PIC_device *find_device(char *pic_name)
 211 {
 212         FILE *pic_file;
 213         char pic_buf[PIC14_STRING_LEN];
 214         char *pic_buf_pos;
 215         int found_processor = FALSE;
 216         int done = FALSE;
 217         char processor_name[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
 218         int num_processor_names = 0;
 219         int pic_maxram = 0;
 220         int pic_bankmsk = 0;
 221         int pic_confsiz = 0;
 222         int pic_program = 0;
 223         int pic_data = 0;
 224         int pic_eeprom = 0;
 225         int pic_io = 0;
 226         char *simple_pic_name;
 227         char *dir;
 228         char filename[512];
 229         int len = 512;
 230
 231         simple_pic_name = sanitise_processor_name(pic_name);
 232
 233         num_of_supported_PICS = 0;
 234
 235         /* open the piclist file */
 236         /* first scan all include directories */
 237         pic_file = NULL;
 238         //fprintf( stderr, "%s: searching %s\n", __FUNCTION__, DEVICE_FILE_NAME );
 239         for (dir = setFirstItem(includeDirsSet);
 240                 !pic_file && dir;
 241                 dir = setNextItem(includeDirsSet))
 242         {
 243           //fprintf( stderr, "searching1 %s\n", dir );
 244           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 245           pic_file = fopen( filename, "rt" );
 246           if (pic_file) break;
 247         } // for
 248         for (dir = setFirstItem(userIncDirsSet);
 249                 !pic_file && dir;
 250                 dir = setNextItem(userIncDirsSet))
 251         {
 252           //fprintf( stderr, "searching2 %s\n", dir );
 253           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 254           pic_file = fopen( filename, "rt" );
 255           if (pic_file) break;
 256         } // for
 257         for (dir = setFirstItem(libDirsSet);
 258                 !pic_file && dir;
 259                 dir = setNextItem(libDirsSet))
 260         {
 261           //fprintf( stderr, "searching3 %s\n", dir );
 262           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 263           pic_file = fopen( filename, "rt" );
 264           if (pic_file) break;
 265         } // for
 266         for (dir = setFirstItem(libPathsSet);
 267                 !pic_file && dir;
 268                 dir = setNextItem(libPathsSet))
 269         {
 270           //fprintf( stderr, "searching4 %s\n", dir );
 271           SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
 272           pic_file = fopen( filename, "rt" );
 273           if (pic_file) break;
 274         } // for
 275         if (!pic_file) {
 276           pic_file = fopen(DATADIR LIB_DIR_SUFFIX DIR_SEPARATOR_STRING "pic" DIR_SEPARATOR_STRING DEVICE_FILE_NAME, "rt");
 277         }
 278         if (pic_file == NULL) {
 279                 /* this second attempt is used when initially building the libraries */
 280                 pic_file = fopen(".." DIR_SEPARATOR_STRING ".." DIR_SEPARATOR_STRING ".." DIR_SEPARATOR_STRING ".."
 281                                 DIR_SEPARATOR_STRING "src" DIR_SEPARATOR_STRING "pic" DIR_SEPARATOR_STRING
 282                                 DEVICE_FILE_NAME, "rt");
 283                 if (pic_file == NULL) {
 284                         fprintf(stderr, "can't find %s\n", DATADIR LIB_DIR_SUFFIX DIR_SEPARATOR_STRING "pic"
 285                                         DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
 286                         return NULL;
 287                 }
 288         }
 289
 290         /* read line by line */
 291         pic_buf[sizeof(pic_buf)-1] = '\0';
 292         while (fgets(pic_buf, sizeof(pic_buf)-1, pic_file) != NULL && !done) {
 293
 294                 /* remove trailing spaces */
 295                 while (isspace(pic_buf[strlen(pic_buf)-1]))
 296                         pic_buf[strlen(pic_buf)-1] = '\0';
 297
 298                 /* remove leading spaces */
 299                 for (pic_buf_pos = pic_buf; isspace(*pic_buf_pos); pic_buf_pos++)
 300                 {}
 301
 302                 /* ignore comment / empty lines */
 303                 if (*pic_buf_pos != '\0' && *pic_buf_pos != '#') {
 304
 305                         /* split into fields */
 306                         char pic_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
 307                         int num_pic_words;
 308                         int wcount;
 309
 310                         num_pic_words = split_words(pic_word, pic_buf_pos);
 311
 312                         if (STRCASECMP(pic_word[0], "processor") == 0) {
 313
 314                                 if (pic_name == NULL) {
 315                                         /* this is the mode where we read all the processors in - store the names for now */
 316                                         if (num_processor_names > 0) {
 317                                                 /* store away all the previous processor definitions */
 318                                                 int dcount;
 319
 320                                                 for (dcount = 1; dcount < num_processor_names; dcount++)
 321                                                         create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
 322                                                                    pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 323                                         }
 324
 325                                         num_processor_names = split_words(processor_name, pic_buf_pos);
 326                                 }
 327                                 else {
 328                                         /* if we've just completed reading a processor definition stop now */
 329                                         if (found_processor)
 330                                                 done = TRUE;
 331                                         else {
 332                                                 /* check if this processor name is a match */
 333                                                 for (wcount = 1; wcount < num_pic_words; wcount++) {
 334
 335                                                         /* skip uninteresting prefixes */
 336                                                         char *found_name = sanitise_processor_name(pic_word[wcount]);
 337
 338                                                         if (STRCASECMP(found_name, simple_pic_name) == 0)
 339                                                                 found_processor = TRUE;
 340                                                 }
 341                                         }
 342                                 }
 343                         }
 344
 345                         else {
 346                                 if (found_processor || pic_name == NULL) {
 347                                         /* only parse a processor section if we've found the one we want */
 348                                         if (STRCASECMP(pic_word[0], "maxram") == 0 && num_pic_words > 1) {
 349                                                 pic_maxram = parse_config_value(pic_word[1]);
 350                                                 setMaxRAM(pic_maxram);
 351                                         }
 352                                         else if (STRCASECMP(pic_word[0], "bankmsk") == 0 && num_pic_words > 1)
 353                                                 pic_bankmsk = parse_config_value(pic_word[1]);
 354
 355                                         else if (STRCASECMP(pic_word[0], "confsiz") == 0 && num_pic_words > 1)
 356                                                 pic_confsiz = parse_config_value(pic_word[1]);
 357
 358                                         else if (STRCASECMP(pic_word[0], "program") == 0 && num_pic_words > 1)
 359                                                 pic_program = parse_config_value(pic_word[1]);
 360
 361                                         else if (STRCASECMP(pic_word[0], "data") == 0 && num_pic_words > 1)
 362                                                 pic_data = parse_config_value(pic_word[1]);
 363
 364                                         else if (STRCASECMP(pic_word[0], "eeprom") == 0 && num_pic_words > 1)
 365                                                 pic_eeprom = parse_config_value(pic_word[1]);
 366
 367                                         else if (STRCASECMP(pic_word[0], "io") == 0 && num_pic_words > 1)
 368                                                 pic_io = parse_config_value(pic_word[1]);
 369
 370                                         else if (STRCASECMP(pic_word[0], "regmap") == 0 && num_pic_words > 2) {
 371                                                 if (found_processor)
 372                                                         register_map(num_pic_words, pic_word);
 373                                         }
 374                                         else if (STRCASECMP(pic_word[0], "memmap") == 0 && num_pic_words > 2) {
 375                                                 if (found_processor)
 376                                                         ram_map(num_pic_words, pic_word);
 377                                         }
 378                                         else {
 379                                                 fprintf(stderr, "WARNING: %s: bad syntax `%s'\n", DEVICE_FILE_NAME, pic_word[0]);
 380                                         }
 381                                 }
 382                         }
 383                 }
 384         }
 385
 386         fclose(pic_file);
 387
 388         /* if we're in read-the-lot mode then create the final processor definition */
 389         if (pic_name == NULL) {
 390
 391                 if (num_processor_names > 0) {
 392                         /* store away all the previous processor definitions */
 393                         int dcount;
 394
 395                         for (dcount = 1; dcount < num_processor_names; dcount++)
 396                                 create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
 397                                            pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 398                 }
 399         }
 400         else {
 401                 /* in search mode */
 402                 if (found_processor) {
 403                         /* create a new pic entry */
 404                         return create_pic(pic_name, pic_maxram, pic_bankmsk,
 405                                           pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
 406                 }
 407         }
 408
 409         return NULL;
 410 }
 411
 412 void addMemRange(memRange *r, int type)
 413 {
 414         int i;
 415         int alias = r->alias;
 416
 417         if (maxRAMaddress < 0) {
 418                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 419                 return;
 420         }
 421
 422         do {
 423                 for (i=r->start_address; i<= r->end_address; i++) {
 424                         if ((i|alias) <= maxRAMaddress) {
 425                                 /* if we haven't seen this address before, enter it */
 426                                 if (!finalMapping[i | alias].isValid) {
 427                                 finalMapping[i | alias].isValid = 1;
 428                                 finalMapping[i | alias].alias = r->alias;
 429                                 finalMapping[i | alias].bank  = r->bank;
 430                                 if(type) {
 431                                         /* hack for now */
 432                                         finalMapping[i | alias].isSFR  = 1;
 433                                 } else {
 434                                         finalMapping[i | alias].isSFR  = 0;
 435                                 }
 436                                 }
 437                         } else {
 438                                 fprintf(stderr, "WARNING: %s:%s memory at 0x%x is beyond max ram = 0x%x\n",
 439                                         __FILE__,__FUNCTION__,(i|alias), maxRAMaddress);
 440                         }
 441                 }
 442
 443                 /* Decrement alias */
 444                 if (alias) {
 445                         alias -= ((alias & (alias - 1)) ^ alias);
 446                 } else {
 447                         alias--;
 448                 }
 449
 450         } while (alias >= 0);
 451 }
 452
 453 void setMaxRAM(int size)
 454 {
 455         int i;
 456         maxRAMaddress = size;
 457
 458         if (maxRAMaddress < 0) {
 459                 fprintf(stderr, "invalid maxram 0x%x setting in %s\n",
 460                         maxRAMaddress, DEVICE_FILE_NAME);
 461                 return;
 462         }
 463
 464         finalMapping = Safe_calloc(1+maxRAMaddress,
 465                 sizeof(AssignedMemory));
 466
 467         /* Now initialize the finalMapping array */
 468
 469         for(i=0; i<=maxRAMaddress; i++) {
 470                 finalMapping[i].reg = NULL;
 471                 finalMapping[i].isValid = 0;
 472                 finalMapping[i].bank = (i>>7);
 473         }
 474 }
 475
 476 /*-----------------------------------------------------------------*
 477 *-----------------------------------------------------------------*/
 478
 479 int isREGinBank(regs *reg, int bank)
 480 {
 481
 482         if(!reg || !pic)
 483                 return 0;
 484
 485         if((int)((reg->address | reg->alias) & pic->bankMask & bank) == bank)
 486                 return 1;
 487
 488         return 0;
 489 }
 490
 491 /*-----------------------------------------------------------------*
 492 *-----------------------------------------------------------------*/
 493 int REGallBanks(regs *reg)
 494 {
 495
 496         if(!reg || !pic)
 497                 return 0;
 498
 499         return ((reg->address | reg->alias) & pic->bankMask);
 500
 501 }
 502
 503 /*-----------------------------------------------------------------*
 504 *-----------------------------------------------------------------*/
 505
 506 int isSFR(int address)
 507 {
 508
 509         if( (address > maxRAMaddress) || !finalMapping[address].isSFR)
 510                 return 0;
 511
 512         return 1;
 513
 514 }
 515
 516 /*
 517 *  dump_map -- debug stuff
 518 */
 519
 520 void dump_map(void)
 521 {
 522         int i;
 523
 524         for(i=0; i<=maxRAMaddress; i++) {
 525                 //fprintf(stdout , "addr 0x%02x is %s\n", i, ((finalMapping[i].isValid) ? "valid":"invalid"));
 526
 527                 if(finalMapping[i].isValid) {
 528                         fprintf(stderr,"addr: 0x%02x",i);
 529                         if(finalMapping[i].isSFR)
 530                                 fprintf(stderr," isSFR");
 531                         if(finalMapping[i].reg)
 532                                 fprintf( stderr, "  reg %s", finalMapping[i].reg->name);
 533                         fprintf(stderr, "\n");
 534                 }
 535         }
 536
 537 }
 538
 539 void dump_sfr(FILE *of)
 540 {
 541 #if 0
 542         int start=-1;
 543         int bank_base;
 544         static int udata_flag=0;
 545 #endif
 546         int addr=0;
 547
 548         //dump_map();   /* display the register map */
 549         //fprintf(stdout,";dump_sfr  \n");
 550         if (maxRAMaddress < 0) {
 551                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 552                 return;
 553         }
 554
 555         for (addr = 0; addr <= maxRAMaddress; addr++)
 556         {
 557                 regs *reg = finalMapping[addr].reg;
 558
 559                 if (reg && !reg->isEmitted)
 560                 {
 561                   if (pic14_options.isLibrarySource && pic14_is_shared (reg))
 562                   {
 563                     /* rely on external declarations for the non-fixed stack */
 564                     /* Update: We always emit the STACK symbols into a
 565                      * udata_shr section, so no extern declaration is
 566                      * required. */
 567                     //fprintf (of, "\textern\t%s\n", reg->name);
 568                   } else {
 569                     emitSymbolToFile (of, reg->name, "udata", reg->size, reg->isFixed ? reg->address : -1, 0, pic14_is_shared (reg));
 570                   }
 571
 572                   reg->isEmitted = 1;
 573                 }
 574         } // for
 575
 576 #if 0
 577         do {
 578
 579                 if(finalMapping[addr].reg && !finalMapping[addr].reg->isEmitted) {
 580
 581                         if(start<0)
 582                                 start = addr;
 583                 } else {
 584                         if(start>=0) {
 585
 586                                 /* clear the lower 7-bits of the start address of the first
 587                                 * variable declared in this bank. The upper bits for the mid
 588                                 * range pics are the bank select bits.
 589                                 */
 590
 591                                 bank_base = start & 0xfff8;
 592
 593                                 /* The bank number printed in the cblock comment tacitly
 594                                 * assumes that the first register in the contiguous group
 595                                 * of registers represents the bank for the whole group */
 596
 597                                 if ( (start != addr) && (!udata_flag) ) {
 598                                         udata_flag = 1;
 599                                         //fprintf(of,"\tudata\n");
 600                                 }
 601
 602                                 for( ; start < addr; start++) {
 603                                         if((finalMapping[start].reg) &&
 604                                                 (!finalMapping[start].reg->isEmitted) &&
 605                                                 (!finalMapping[start].instance) &&
 606                                                 (!finalMapping[start].isSFR)) {
 607
 608                                                 if (finalMapping[start].reg->isFixed) {
 609                                                         unsigned i;
 610                                                         for (i=0; i<finalMapping[start].reg->size; i++) {
 611                                                                 fprintf(of,"%s\tEQU\t0x%04x\n",
 612                                                                         finalMapping[start].reg->name,
 613                                                                         finalMapping[start].reg->address+i);
 614                                                         }
 615                                                 } else {
 616                                                         emitSymbolToFile (of, finalMapping[start].reg->name, finalMapping[start].reg->size);
 617 #if 0
 618                                                         fprintf(of,"%s\tres\t%i\n",
 619                                                                 finalMapping[start].reg->name,
 620                                                                 finalMapping[start].reg->size);
 621 #endif
 622                                                 }
 623                                                 finalMapping[start].reg->isEmitted = 1;
 624                                         }
 625                                 }
 626
 627                                 start = -1;
 628                         }
 629
 630                 }
 631
 632                 addr++;
 633
 634         } while(addr <= maxRAMaddress);
 635
 636
 637 #endif
 638 }
 639
 640 /*-----------------------------------------------------------------*
 641 *  void list_valid_pics(int ncols, int list_alias)
 642 *
 643 * Print out a formatted list of valid PIC devices
 644 *
 645 * ncols - number of columns in the list.
 646 *
 647 * list_alias - if non-zero, print all of the supported aliases
 648 *              for a device (e.g. F84, 16F84, etc...)
 649 *-----------------------------------------------------------------*/
 650 void list_valid_pics(int ncols, int list_alias)
 651 {
 652         int col=0,longest;
 653         int i,j,k,l;
 654         int max_alias = 1;
 655
 656         if (num_of_supported_PICS == 0)
 657                 find_device(NULL);          /* load all the definitions */
 658
 659         if(list_alias)
 660                 max_alias = PROCESSOR_NAMES;
 661
 662         /* decrement the column number if it's greater than zero */
 663         ncols = (ncols > 1) ? ncols-1 : 4;
 664
 665         /* Find the device with the longest name */
 666         for(i=0,longest=0; i<num_of_supported_PICS; i++) {
 667                 for(j=0; j<max_alias; j++) {
 668                         k = strlen(Pics[i]->name[j]);
 669                         if(k>longest)
 670                                 longest = k;
 671                 }
 672         }
 673
 674 #if 1
 675         /* heading */
 676         fprintf(stderr, "\nPIC14 processors and their characteristics:\n\n");
 677         fprintf(stderr, " processor");
 678         for(k=0; k<longest-1; k++)
 679                 fputc(' ',stderr);
 680         fprintf(stderr, "program     RAM      EEPROM    I/O\n");
 681         fprintf(stderr, "-----------------------------------------------------\n");
 682
 683         for(i=0;  i < num_of_supported_PICS; i++) {
 684                 fprintf(stderr,"  %s", Pics[i]->name[0]);
 685                 l = longest + 2 - strlen(Pics[i]->name[0]);
 686                 for(k=0; k<l; k++)
 687                         fputc(' ',stderr);
 688
 689                 fprintf(stderr, "     ");
 690                 if (Pics[i]->programMemSize % 1024 == 0)
 691                         fprintf(stderr, "%4dK", Pics[i]->programMemSize / 1024);
 692                 else
 693                         fprintf(stderr, "%5d", Pics[i]->programMemSize);
 694
 695                 fprintf(stderr, "     %5d     %5d     %4d\n",
 696                         Pics[i]->dataMemSize, Pics[i]->eepromMemSize, Pics[i]->ioPins);
 697         }
 698
 699         col = 0;
 700
 701         fprintf(stderr, "\nPIC14 processors supported:\n");
 702         for(i=0;  i < num_of_supported_PICS; i++) {
 703
 704                 for (j = 0; j<max_alias; j++) {
 705
 706                         fprintf(stderr,"%s", Pics[i]->name[j]);
 707                         if(col<ncols) {
 708                                 l = longest + 2 - strlen(Pics[i]->name[j]);
 709                                 for(k=0; k<l; k++)
 710                                         fputc(' ',stderr);
 711
 712                                 col++;
 713
 714                         } else {
 715                                 fputc('\n',stderr);
 716                                 col = 0;
 717                         }
 718
 719                 }
 720
 721         }
 722 #endif
 723         if(col != 0)
 724                 fputc('\n',stderr);
 725 }
 726
 727 /*-----------------------------------------------------------------*
 728 *
 729 *-----------------------------------------------------------------*/
 730 void init_pic(char *pic_type)
 731 {
 732         pic = find_device(pic_type);
 733
 734         if(!pic) {
 735                 if(pic_type)
 736                         fprintf(stderr, "'%s' was not found.\n", pic_type);
 737                 else
 738                         fprintf(stderr, "No processor has been specified (use -pPROCESSOR_NAME)\n");
 739
 740                 list_valid_pics(7,0);
 741                 exit(1);
 742         }
 743 }
 744
 745 /*-----------------------------------------------------------------*
 746 *
 747 *-----------------------------------------------------------------*/
 748 int picIsInitialized(void)
 749 {
 750         if(pic && maxRAMaddress > 0)
 751                 return 1;
 752
 753         return 0;
 754
 755 }
 756
 757 /*-----------------------------------------------------------------*
 758 *  char *processor_base_name(void) - Include file is derived from this.
 759 *-----------------------------------------------------------------*/
 760 char *processor_base_name(void)
 761 {
 762
 763         if(!pic)
 764                 return NULL;
 765
 766         return pic->name[1];
 767 }
 768
 769 /*-----------------------------------------------------------------*
 770 *-----------------------------------------------------------------*/
 771 int validAddress(int address, int reg_size)
 772 {
 773         int i;
 774
 775         if (maxRAMaddress < 0) {
 776                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 777                 return 0;
 778         }
 779         //  fprintf(stderr, "validAddress: Checking 0x%04x\n",address);
 780         assert (reg_size > 0);
 781         if(address + (reg_size - 1) > maxRAMaddress)
 782                 return 0;
 783
 784         for (i=0; i<reg_size; i++)
 785                 if(!finalMapping[address + i].isValid ||
 786                         finalMapping[address+i].reg ||
 787                         finalMapping[address+i].isSFR )
 788                         return 0;
 789
 790                 return 1;
 791 }
 792
 793 /*-----------------------------------------------------------------*
 794 *-----------------------------------------------------------------*/
 795 void mapRegister(regs *reg)
 796 {
 797
 798         unsigned i;
 799         int alias;
 800
 801         if(!reg || !reg->size) {
 802                 fprintf(stderr,"WARNING: %s:%s:%d Bad register\n",__FILE__,__FUNCTION__,__LINE__);
 803                 return;
 804         }
 805
 806         if (maxRAMaddress < 0) {
 807                 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
 808                 return;
 809         }
 810
 811         for(i=0; i<reg->size; i++) {
 812
 813                 alias = finalMapping[reg->address].alias;
 814                 reg->alias = alias;
 815
 816                 do {
 817
 818                         //fprintf(stdout,"mapping %s to address 0x%02x, reg size = %d\n",reg->name, (reg->address+alias+i),reg->size);
 819
 820                         finalMapping[reg->address + alias + i].reg = reg;
 821                         finalMapping[reg->address + alias + i].instance = i;
 822
 823                         /* Decrement alias */
 824                         if(alias)
 825                                 alias -= ((alias & (alias - 1)) ^ alias);
 826                         else
 827                                 alias--;
 828
 829                 } while (alias>=0);
 830         }
 831
 832         //fprintf(stderr,"%s - %s addr = 0x%03x, size %d\n",__FUNCTION__,reg->name, reg->address,reg->size);
 833
 834         reg->isMapped = 1;
 835
 836 }
 837
 838 /*-----------------------------------------------------------------*
 839 *-----------------------------------------------------------------*/
 840 int assignRegister(regs *reg, int start_address)
 841 {
 842         int i;
 843
 844         //fprintf(stderr,"%s -  %s start_address = 0x%03x\n",__FUNCTION__,reg->name, start_address);
 845         if(reg->isFixed) {
 846
 847                 if (validAddress(reg->address,reg->size)) {
 848                         //fprintf(stderr,"%s -  %s address = 0x%03x\n",__FUNCTION__,reg->name, reg->address);
 849                         mapRegister(reg);
 850                         return reg->address;
 851                 }
 852
 853                 if( isSFR(reg->address)) {
 854                         mapRegister(reg);
 855                         return reg->address;
 856                 }
 857
 858                 fprintf(stderr, "WARNING: Ignoring Out of Range register assignment at fixed address %d, %s\n",
 859                     reg->address, reg->name);
 860
 861         } else {
 862
 863         /* This register does not have a fixed address requirement
 864         * so we'll search through all availble ram address and
 865                 * assign the first one */
 866
 867                 for (i=start_address; i<=maxRAMaddress; i++) {
 868
 869                         if (validAddress(i,reg->size)) {
 870                                 reg->address = i;
 871                                 mapRegister(reg);
 872                                 return i;
 873                         }
 874                 }
 875
 876                 fprintf(stderr, "WARNING: No more RAM available for %s\n",reg->name);
 877
 878         }
 879
 880         return -1;
 881 }
 882
 883 /*-----------------------------------------------------------------*
 884 *-----------------------------------------------------------------*/
 885 void assignFixedRegisters(set *regset)
 886 {
 887         regs *reg;
 888
 889         for (reg = setFirstItem(regset) ; reg ;
 890         reg = setNextItem(regset)) {
 891
 892                 if(reg->isFixed)
 893                         assignRegister(reg,0);
 894         }
 895
 896 }
 897
 898 /*-----------------------------------------------------------------*
 899 *-----------------------------------------------------------------*/
 900 void assignRelocatableRegisters(set *regset, int used)
 901 {
 902
 903         regs *reg;
 904         int address = 0;
 905
 906         for (reg = setFirstItem(regset) ; reg ;
 907         reg = setNextItem(regset)) {
 908
 909                 //fprintf(stdout,"assigning %s (%d) isFixed=%d, wasUsed=%d\n",reg->name,reg->size,reg->isFixed,reg->wasUsed);
 910
 911                 if((!reg->isExtern) && (!reg->isFixed) && ( used || reg->wasUsed)) {
 912                         /* If register have been reused then shall not print it a second time. */
 913                         set *s;
 914                         int done = 0;
 915                         for (s = regset; s; s = s->next) {
 916                                 regs *r;
 917                                 r = s->item;
 918                                 if (r == reg)
 919                                         break;
 920                                 if((!r->isFixed) && ( used || r->wasUsed)) {
 921                                         if (r->rIdx == reg->rIdx) {
 922                                                 reg->address = r->address;
 923                                                 done = 1;
 924                                                 break;
 925                                         }
 926                                 }
 927                         }
 928                         if (!done)
 929                                 address = assignRegister(reg,address);
 930                 }
 931         }
 932
 933 }
 934
 935 /* Keep track of whether we found an assignment to the __config words. */
 936 static int pic14_hasSetConfigWord = 0;
 937
 938 /*-----------------------------------------------------------------*
 939  *  void assignConfigWordValue(int address, int value)
 940  *
 941  * Most midrange PICs have one config word at address 0x2007.
 942  * Newer PIC14s have a second config word at address 0x2008.
 943  * This routine will assign values to those addresses.
 944  *
 945  *-----------------------------------------------------------------*/
 946
 947 void pic14_assignConfigWordValue(int address, int value)
 948 {
 949         if (CONFIG_WORD_ADDRESS == address)
 950                 config_word = value;
 951
 952         else if (CONFIG2_WORD_ADDRESS == address)
 953                 config2_word = value;
 954
 955         //fprintf(stderr,"setting config word 0x%x to 0x%x\n", address, value);
 956         pic14_hasSetConfigWord = 1;
 957 }
 958
 959 /*-----------------------------------------------------------------*
 960  * int pic14_emitConfigWord (FILE * vFile)
 961  *
 962  * Emit the __config directives iff we found a previous assignment
 963  * to the config word.
 964  *-----------------------------------------------------------------*/
 965 extern char *iComments2;
 966 int pic14_emitConfigWord (FILE * vFile)
 967 {
 968   if (pic14_hasSetConfigWord)
 969   {
 970     fprintf (vFile, "%s", iComments2);
 971     fprintf (vFile, "; config word \n");
 972     fprintf (vFile, "%s", iComments2);
 973     if (pic14_getHasSecondConfigReg())
 974     {
 975       fprintf (vFile, "\t__config _CONFIG1, 0x%x\n", pic14_getConfigWord(0x2007));
 976       fprintf (vFile, "\t__config _CONFIG2, 0x%x\n", pic14_getConfigWord(0x2008));
 977     }
 978     else
 979       fprintf (vFile, "\t__config 0x%x\n", pic14_getConfigWord(0x2007));
 980
 981     return 1;
 982   }
 983   return 0;
 984 }
 985
 986 /*-----------------------------------------------------------------*
 987  * int pic14_getConfigWord(int address)
 988  *
 989  * Get the current value of a config word.
 990  *
 991  *-----------------------------------------------------------------*/
 992
 993 int pic14_getConfigWord(int address)
 994 {
 995         switch (address)
 996         {
 997         case CONFIG_WORD_ADDRESS:
 998                 return config_word;
 999
1000         case CONFIG2_WORD_ADDRESS:
1001                 return config2_word;
1002
1003         default:
1004                 return 0;
1005         }
1006 }
1007
1008 /*-----------------------------------------------------------------*
1009 *
1010 *-----------------------------------------------------------------*/
1011 unsigned pic14_getMaxRam(void)
1012 {
1013         return pic->defMaxRAMaddrs;
1014 }
1015
1016
1017 /*-----------------------------------------------------------------*
1018 *  int getHasSecondConfigReg(void) - check if the device has a
1019 *  second config register, rather than just one.
1020 *-----------------------------------------------------------------*/
1021 int pic14_getHasSecondConfigReg(void)
1022 {
1023         if(!pic)
1024                 return 0;
1025         else
1026                 return pic->hasSecondConfigReg;
1027 }
1028
1029 /*-----------------------------------------------------------------*
1030  * Query the size of the sharebank of the selected device.
1031  * FIXME: Currently always returns 16.
1032  *-----------------------------------------------------------------*/
1033 int pic14_getSharebankSize(void)
1034 {
1035         return 16;
1036 }
1037
1038 /*-----------------------------------------------------------------*
1039  * Query the highest byte address occupied by the sharebank of the
1040  * selected device.
1041  * FIXME: Currently always returns 0x7f.
1042  * THINK: Might not be needed, if we assign all shareable objects to
1043  *        a `udata_shr' section and let the linker do the rest...
1044  * Tried it, but yields `no target memory available' for pic16f877...
1045  *-----------------------------------------------------------------*/
1046 int pic14_getSharebankAddress(void)
1047 {
1048         int sharebankAddress = 0x7f;
1049         /* If total RAM is less than 0x7f as with 16f84 then reduce
1050          * sharebankAddress to fit */
1051         if ((unsigned)sharebankAddress > pic14_getMaxRam())
1052                 sharebankAddress = (int)pic14_getMaxRam();
1053         return sharebankAddress;
1054 }
1055