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