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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
  23 #include "common.h"   // Include everything in the SDCC src directory
  24 #include "newalloc.h"
  25
  26
  27 #include "pcode.h"
  28 #include "ralloc.h"
  29 #include "device.h"
  30
  31 #if defined(__BORLANDC__) || defined(_MSC_VER)
  32 #define STRCASECMP stricmp
  33 #else
  34 #define STRCASECMP strcasecmp
  35 #endif
  36
  37 static PIC_device Pics[] = {
  38         {
  39                 {"p16f627", "16f627", "pic16f627", "f627"}, /* processor name */
  40                 (memRange *)NULL,
  41                 (memRange *)NULL,
  42                 0,                /* max ram address (calculated) */
  43                 0x1ff,            /* default max ram address */
  44                 0x80,             /* Bank Mask */
  45         },
  46
  47         {
  48         {"p16f628", "16f628", "pic16f628", "f628"},
  49                 (memRange *)NULL,
  50                 (memRange *)NULL,
  51                 0,
  52                 0x1ff,
  53                 0x80,
  54         },
  55
  56         {
  57                 {"p16f84", "16f84", "pic16f84", "f84"},
  58                         (memRange *)NULL,
  59                         (memRange *)NULL,
  60                         0,
  61                         0xcf,
  62                         0x80,
  63         },
  64
  65         {
  66                 {"p16f873", "16f873", "pic16f873", "f873"},
  67                         (memRange *)NULL,
  68                         (memRange *)NULL,
  69                         0,
  70                         0x1ff,
  71                         0x180,
  72         },
  73
  74         {
  75                 {"p16f877", "16f877", "pic16f877", "f877"},
  76                         (memRange *)NULL,
  77                         (memRange *)NULL,
  78                         0,
  79                         0x1ff,
  80                         0x180,
  81         },
  82
  83         {
  84                 {"p16f819", "16f819", "pic16f819", "f819"},
  85                         (memRange *)NULL,
  86                         (memRange *)NULL,
  87                         0,
  88                         0x1ff,
  89                         0x80,
  90         },
  91
  92 };
  93
  94 static int num_of_supported_PICS = sizeof(Pics)/sizeof(PIC_device);
  95
  96 static PIC_device *pic=NULL;
  97
  98 AssignedMemory *finalMapping=NULL;
  99
 100 #define CONFIG_WORD_ADDRESS 0x2007
 101 #define DEFAULT_CONFIG_WORD 0x3fff
 102
 103 static unsigned int config_word = DEFAULT_CONFIG_WORD;
 104
 105 void addMemRange(memRange *r, int type)
 106 {
 107         int i;
 108         int alias = r->alias;
 109
 110         if (pic->maxRAMaddress < 0) {
 111                 fprintf(stderr, "missing \"#pragma maxram\" setting\n");
 112                 return;
 113         }
 114
 115         do {
 116                 for (i=r->start_address; i<= r->end_address; i++) {
 117                         if ((i|alias) <= pic->maxRAMaddress) {
 118                                 finalMapping[i | alias].isValid = 1;
 119                                 finalMapping[i | alias].alias = r->alias;
 120                                 finalMapping[i | alias].bank  = r->bank;
 121                                 if(type) {
 122                                         /* hack for now */
 123                                         finalMapping[i | alias].isSFR  = 1;
 124                                 } else {
 125                                         finalMapping[i | alias].isSFR  = 0;
 126                                 }
 127                         } else {
 128                                 fprintf(stderr, "WARNING: %s:%s memory at 0x%x is beyond max ram = 0x%x\n",
 129                                         __FILE__,__FUNCTION__,(i|alias), pic->maxRAMaddress);
 130                         }
 131                 }
 132
 133                 /* Decrement alias */
 134                 if (alias) {
 135                         alias -= ((alias & (alias - 1)) ^ alias);
 136                 } else {
 137                         alias--;
 138                 }
 139
 140         } while (alias >= 0);
 141 }
 142
 143 void setMaxRAM(int size)
 144 {
 145         int i;
 146         pic->maxRAMaddress = size;
 147
 148         if (pic->maxRAMaddress < 0) {
 149                 fprintf(stderr, "invalid \"#pragma maxram 0x%x\" setting\n",
 150                         pic->maxRAMaddress);
 151                 return;
 152         }
 153
 154         finalMapping = Safe_calloc(1+pic->maxRAMaddress,
 155                 sizeof(AssignedMemory));
 156
 157         /* Now initialize the finalMapping array */
 158
 159         for(i=0; i<=pic->maxRAMaddress; i++) {
 160                 finalMapping[i].reg = NULL;
 161                 finalMapping[i].isValid = 0;
 162                 finalMapping[i].bank = (i>>7);
 163         }
 164 }
 165
 166 /*-----------------------------------------------------------------*
 167 *-----------------------------------------------------------------*/
 168
 169 int isREGinBank(regs *reg, int bank)
 170 {
 171
 172         if(!reg || !pic)
 173                 return 0;
 174
 175         if((int)((reg->address | reg->alias) & pic->bankMask & bank) == bank)
 176                 return 1;
 177
 178         return 0;
 179 }
 180
 181 /*-----------------------------------------------------------------*
 182 *-----------------------------------------------------------------*/
 183 int REGallBanks(regs *reg)
 184 {
 185
 186         if(!reg || !pic)
 187                 return 0;
 188
 189         return ((reg->address | reg->alias) & pic->bankMask);
 190
 191 }
 192
 193 /*-----------------------------------------------------------------*
 194 *-----------------------------------------------------------------*/
 195
 196 /*
 197 *  dump_map -- debug stuff
 198 */
 199
 200 void dump_map(void)
 201 {
 202         int i;
 203
 204         for(i=0; i<=pic->maxRAMaddress; i++) {
 205                 //fprintf(stdout , "addr 0x%02x is %s\n", i, ((finalMapping[i].isValid) ? "valid":"invalid"));
 206
 207                 if(finalMapping[i].isValid) {
 208                         fprintf(stderr,"addr: 0x%02x",i);
 209                         if(finalMapping[i].isSFR)
 210                                 fprintf(stderr," isSFR");
 211                         if(finalMapping[i].reg)
 212                                 fprintf( stderr, "  reg %s", finalMapping[i].reg->name);
 213                         fprintf(stderr, "\n");
 214                 }
 215         }
 216
 217 }
 218
 219 void dump_sfr(FILE *of)
 220 {
 221
 222         int start=-1;
 223         int addr=0;
 224         int bank_base;
 225         static int udata_flag=0;
 226
 227         //dump_map();   /* display the register map */
 228         //fprintf(stdout,";dump_sfr  \n");
 229         if (pic->maxRAMaddress < 0) {
 230                 fprintf(stderr, "missing \"#pragma maxram\" setting\n");
 231                 return;
 232         }
 233
 234         do {
 235
 236                 if(finalMapping[addr].reg && !finalMapping[addr].reg->isEmitted) {
 237
 238                         if(start<0)
 239                                 start = addr;
 240                 } else {
 241                         if(start>=0) {
 242
 243                                 /* clear the lower 7-bits of the start address of the first
 244                                 * variable declared in this bank. The upper bits for the mid
 245                                 * range pics are the bank select bits.
 246                                 */
 247
 248                                 bank_base = start & 0xfff8;
 249
 250                                 /* The bank number printed in the cblock comment tacitly
 251                                 * assumes that the first register in the contiguous group
 252                                 * of registers represents the bank for the whole group */
 253
 254                                 if ( (start != addr) && (!udata_flag) ) {
 255                                         udata_flag = 1;
 256                                         //fprintf(of,"\tudata\n");
 257                                 }
 258
 259                                 for( ; start < addr; start++) {
 260                                         if((finalMapping[start].reg) &&
 261                                                 (!finalMapping[start].reg->isEmitted) &&
 262                                                 (!finalMapping[start].instance) &&
 263                                                 (!finalMapping[start].isSFR)) {
 264
 265                                                 if (finalMapping[start].reg->isFixed) {
 266                                                         unsigned i;
 267                                                         for (i=0; i<finalMapping[start].reg->size; i++) {
 268                                                                 fprintf(of,"%s\tEQU\t0x%04x\n",
 269                                                                         finalMapping[start].reg->name,
 270                                                                         finalMapping[start].reg->address+i);
 271                                                         }
 272                                                 } else {
 273                                                         fprintf(of,"%s\tres\t%i\n",
 274                                                                 finalMapping[start].reg->name,
 275                                                                 finalMapping[start].reg->size);
 276                                                 }
 277                                                 finalMapping[start].reg->isEmitted = 1;
 278                                         }
 279                                 }
 280
 281                                 start = -1;
 282                         }
 283
 284                 }
 285
 286                 addr++;
 287
 288         } while(addr <= pic->maxRAMaddress);
 289
 290
 291 }
 292
 293 /*-----------------------------------------------------------------*
 294 *  void list_valid_pics(int ncols, int list_alias)
 295 *
 296 * Print out a formatted list of valid PIC devices
 297 *
 298 * ncols - number of columns in the list.
 299 *
 300 * list_alias - if non-zero, print all of the supported aliases
 301 *              for a device (e.g. F84, 16F84, etc...)
 302 *-----------------------------------------------------------------*/
 303 void list_valid_pics(int ncols, int list_alias)
 304 {
 305         int col,longest;
 306         int i,j,k,l;
 307
 308         if(list_alias)
 309                 list_alias = sizeof(Pics[0].name) / sizeof(Pics[0].name[0]);
 310
 311         /* decrement the column number if it's greater than zero */
 312         ncols = (ncols > 1) ? ncols-1 : 4;
 313
 314         /* Find the device with the longest name */
 315         for(i=0,longest=0; i<num_of_supported_PICS; i++) {
 316                 for(j=0; j<=list_alias; j++) {
 317                         k = strlen(Pics[i].name[j]);
 318                         if(k>longest)
 319                                 longest = k;
 320                 }
 321         }
 322
 323         col = 0;
 324
 325         for(i=0;  i < num_of_supported_PICS; i++) {
 326                 j = 0;
 327                 do {
 328
 329                         fprintf(stderr,"%s", Pics[i].name[j]);
 330                         if(col<ncols) {
 331                                 l = longest + 2 - strlen(Pics[i].name[j]);
 332                                 for(k=0; k<l; k++)
 333                                         fputc(' ',stderr);
 334
 335                                 col++;
 336
 337                         } else {
 338                                 fputc('\n',stderr);
 339                                 col = 0;
 340                         }
 341
 342                 } while(++j<list_alias);
 343
 344         }
 345         if(col != ncols)
 346                 fputc('\n',stderr);
 347
 348 }
 349
 350 /*-----------------------------------------------------------------*
 351 *
 352 *-----------------------------------------------------------------*/
 353 PIC_device *find_device(char *name)
 354 {
 355
 356         int i,j;
 357
 358         if(!name)
 359                 return NULL;
 360
 361         for(i = 0; i<num_of_supported_PICS; i++) {
 362
 363                 for(j=0; j<PROCESSOR_NAMES; j++)
 364                         if(!STRCASECMP(Pics[i].name[j], name) )
 365                                 return &Pics[i];
 366         }
 367
 368         /* not found */
 369         return NULL;
 370 }
 371
 372 /*-----------------------------------------------------------------*
 373 *
 374 *-----------------------------------------------------------------*/
 375 void init_pic(char *pic_type)
 376 {
 377         pic = find_device(pic_type);
 378
 379         if(!pic) {
 380                 if(pic_type)
 381                         fprintf(stderr, "'%s' was not found.\n", pic_type);
 382                 else
 383                         fprintf(stderr, "No processor has been specified (use -pPROCESSOR_NAME)\n");
 384
 385                 fprintf(stderr,"Valid devices are:\n");
 386
 387                 list_valid_pics(4,0);
 388                 exit(1);
 389         }
 390
 391         pic->maxRAMaddress = -1;
 392 }
 393
 394 /*-----------------------------------------------------------------*
 395 *
 396 *-----------------------------------------------------------------*/
 397 int picIsInitialized(void)
 398 {
 399         if(pic && pic->maxRAMaddress > 0)
 400                 return 1;
 401
 402         return 0;
 403
 404 }
 405
 406 /*-----------------------------------------------------------------*
 407 *  char *processor_base_name(void) - Include file is derived from this.
 408 *-----------------------------------------------------------------*/
 409 char *processor_base_name(void)
 410 {
 411
 412         if(!pic)
 413                 return NULL;
 414
 415         return pic->name[0];
 416 }
 417
 418 int isSFR(int address)
 419 {
 420
 421         if( (address > pic->maxRAMaddress) || !finalMapping[address].isSFR)
 422                 return 0;
 423
 424         return 1;
 425
 426 }
 427
 428 /*-----------------------------------------------------------------*
 429 *-----------------------------------------------------------------*/
 430 int validAddress(int address, int reg_size)
 431 {
 432         int i;
 433
 434         if (pic->maxRAMaddress < 0) {
 435                 fprintf(stderr, "missing \"#pragma maxram\" setting\n");
 436                 return 0;
 437         }
 438         //  fprintf(stderr, "validAddress: Checking 0x%04x\n",address);
 439         if(address > pic->maxRAMaddress)
 440                 return 0;
 441
 442         for (i=0; i<reg_size; i++)
 443                 if(!finalMapping[address + i].isValid ||
 444                         finalMapping[address+i].reg ||
 445                         finalMapping[address+i].isSFR )
 446                         return 0;
 447
 448                 return 1;
 449 }
 450
 451 /*-----------------------------------------------------------------*
 452 *-----------------------------------------------------------------*/
 453 void mapRegister(regs *reg)
 454 {
 455
 456         unsigned i;
 457         int alias;
 458
 459         if(!reg || !reg->size) {
 460                 fprintf(stderr,"WARNING: %s:%s:%d Bad register\n",__FILE__,__FUNCTION__,__LINE__);
 461                 return;
 462         }
 463
 464         if (pic->maxRAMaddress < 0) {
 465                 fprintf(stderr, "missing \"#pragma maxram\" setting\n");
 466                 return;
 467         }
 468
 469         for(i=0; i<reg->size; i++) {
 470
 471                 alias = finalMapping[reg->address].alias;
 472                 reg->alias = alias;
 473
 474                 do {
 475
 476                         //fprintf(stdout,"mapping %s to address 0x%02x, reg size = %d\n",reg->name, (reg->address+alias+i),reg->size);
 477
 478                         finalMapping[reg->address + alias + i].reg = reg;
 479                         finalMapping[reg->address + alias + i].instance = i;
 480
 481                         /* Decrement alias */
 482                         if(alias)
 483                                 alias -= ((alias & (alias - 1)) ^ alias);
 484                         else
 485                                 alias--;
 486
 487                 } while (alias>=0);
 488         }
 489
 490         //fprintf(stderr,"%s - %s addr = 0x%03x, size %d\n",__FUNCTION__,reg->name, reg->address,reg->size);
 491
 492         reg->isMapped = 1;
 493
 494 }
 495
 496 /*-----------------------------------------------------------------*
 497 *-----------------------------------------------------------------*/
 498 int assignRegister(regs *reg, int start_address)
 499 {
 500         int i;
 501
 502         //fprintf(stderr,"%s -  %s start_address = 0x%03x\n",__FUNCTION__,reg->name, start_address);
 503         if(reg->isFixed) {
 504
 505                 if (validAddress(reg->address,reg->size)) {
 506                         //fprintf(stderr,"%s -  %s address = 0x%03x\n",__FUNCTION__,reg->name, reg->address);
 507                         mapRegister(reg);
 508                         return reg->address;
 509                 }
 510
 511                 if( isSFR(reg->address)) {
 512                         mapRegister(reg);
 513                         return reg->address;
 514                 }
 515
 516                 //fprintf(stderr, "WARNING: Ignoring Out of Range register assignment at fixed address %d, %s\n",
 517                 //    reg->address, reg->name);
 518
 519         } else {
 520
 521         /* This register does not have a fixed address requirement
 522         * so we'll search through all availble ram address and
 523                 * assign the first one */
 524
 525                 for (i=start_address; i<=pic->maxRAMaddress; i++) {
 526
 527                         if (validAddress(i,reg->size)) {
 528                                 reg->address = i;
 529                                 mapRegister(reg);
 530                                 return i;
 531                         }
 532                 }
 533
 534                 fprintf(stderr, "WARNING: No more RAM available for %s\n",reg->name);
 535
 536         }
 537
 538         return -1;
 539 }
 540
 541 /*-----------------------------------------------------------------*
 542 *-----------------------------------------------------------------*/
 543 void assignFixedRegisters(set *regset)
 544 {
 545         regs *reg;
 546
 547         for (reg = setFirstItem(regset) ; reg ;
 548         reg = setNextItem(regset)) {
 549
 550                 if(reg->isFixed)
 551                         assignRegister(reg,0);
 552         }
 553
 554 }
 555
 556 /*-----------------------------------------------------------------*
 557 *-----------------------------------------------------------------*/
 558 void assignRelocatableRegisters(set *regset, int used)
 559 {
 560
 561         regs *reg;
 562         int address = 0;
 563
 564         for (reg = setFirstItem(regset) ; reg ;
 565         reg = setNextItem(regset)) {
 566
 567                 //fprintf(stdout,"assigning %s isFixed=%d, wasUsed=%d\n",reg->name,reg->isFixed,reg->wasUsed);
 568
 569                 if((!reg->isFixed) && ( used || reg->wasUsed)) {
 570                         /* If register have been reused then shall not print it a second time. */
 571                         set *s;
 572                         int done = 0;
 573                         for (s = regset; s; s = s->next) {
 574                                 regs *r;
 575                                 r = s->item;
 576                                 if (r == reg)
 577                                         break;
 578                                 if((!r->isFixed) && ( used || r->wasUsed)) {
 579                                         if (r->rIdx == reg->rIdx) {
 580                                                 reg->address = r->address;
 581                                                 done = 1;
 582                                                 break;
 583                                         }
 584                                 }
 585                         }
 586                         if (!done)
 587                                 address = assignRegister(reg,address);
 588                 }
 589         }
 590
 591 }
 592
 593
 594 /*-----------------------------------------------------------------*
 595 *  void assignConfigWordValue(int address, int value)
 596 *
 597 * All midrange PICs have one config word at address 0x2007.
 598 * This routine will assign a value to that address.
 599 *
 600 *-----------------------------------------------------------------*/
 601
 602 void assignConfigWordValue(int address, int value)
 603 {
 604         if(CONFIG_WORD_ADDRESS == address)
 605                 config_word = value;
 606
 607         //fprintf(stderr,"setting config word to 0x%x\n",value);
 608
 609 }
 610 /*-----------------------------------------------------------------*
 611 * int getConfigWord(int address)
 612 *
 613 * Get the current value of the config word.
 614 *
 615 *-----------------------------------------------------------------*/
 616
 617 int getConfigWord(int address)
 618 {
 619         if(CONFIG_WORD_ADDRESS == address)
 620                 return config_word;
 621
 622         else
 623                 return 0;
 624
 625 }
 626
 627 /*-----------------------------------------------------------------*
 628 *
 629 *-----------------------------------------------------------------*/
 630 void setDefMaxRam(void)
 631 {
 632         unsigned i;
 633         setMaxRAM(pic->defMaxRAMaddrs); /* Max RAM has not been included, so use default setting */
 634         /* Validate full memory range for use by general purpose RAM */
 635         for (i=pic->defMaxRAMaddrs; i--; ) {
 636                 finalMapping[i].bank = (i>>7);
 637                 finalMapping[i].isValid = 1;
 638         }
 639 }
 640
 641 /*-----------------------------------------------------------------*
 642 *
 643 *-----------------------------------------------------------------*/
 644 unsigned getMaxRam(void)
 645 {
 646         return pic->defMaxRAMaddrs;
 647 }