drivers/misc/altera-stapl/altera.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * altera.c
   4  *
   5  * altera FPGA driver
   6  *
   7  * Copyright (C) Altera Corporation 1998-2001
   8  * Copyright (C) 2010,2011 NetUP Inc.
   9  * Copyright (C) 2010,2011 Igor M. Liplianin <liplianin@netup.ru>
  10  */
  11
  12 #include <asm/unaligned.h>
  13 #include <linux/ctype.h>
  14 #include <linux/string.h>
  15 #include <linux/firmware.h>
  16 #include <linux/slab.h>
  17 #include <linux/module.h>
  18 #include <misc/altera.h>
  19 #include "altera-exprt.h"
  20 #include "altera-jtag.h"
  21
  22 static int debug = 1;
  23 module_param(debug, int, 0644);
  24 MODULE_PARM_DESC(debug, "enable debugging information");
  25
  26 MODULE_DESCRIPTION("altera FPGA kernel module");
  27 MODULE_AUTHOR("Igor M. Liplianin  <liplianin@netup.ru>");
  28 MODULE_LICENSE("GPL");
  29
  30 #define dprintk(args...) \
  31         if (debug) { \
  32                 printk(KERN_DEBUG args); \
  33         }
  34
  35 enum altera_fpga_opcode {
  36         OP_NOP = 0,
  37         OP_DUP,
  38         OP_SWP,
  39         OP_ADD,
  40         OP_SUB,
  41         OP_MULT,
  42         OP_DIV,
  43         OP_MOD,
  44         OP_SHL,
  45         OP_SHR,
  46         OP_NOT,
  47         OP_AND,
  48         OP_OR,
  49         OP_XOR,
  50         OP_INV,
  51         OP_GT,
  52         OP_LT,
  53         OP_RET,
  54         OP_CMPS,
  55         OP_PINT,
  56         OP_PRNT,
  57         OP_DSS,
  58         OP_DSSC,
  59         OP_ISS,
  60         OP_ISSC,
  61         OP_DPR = 0x1c,
  62         OP_DPRL,
  63         OP_DPO,
  64         OP_DPOL,
  65         OP_IPR,
  66         OP_IPRL,
  67         OP_IPO,
  68         OP_IPOL,
  69         OP_PCHR,
  70         OP_EXIT,
  71         OP_EQU,
  72         OP_POPT,
  73         OP_ABS = 0x2c,
  74         OP_BCH0,
  75         OP_PSH0 = 0x2f,
  76         OP_PSHL = 0x40,
  77         OP_PSHV,
  78         OP_JMP,
  79         OP_CALL,
  80         OP_NEXT,
  81         OP_PSTR,
  82         OP_SINT = 0x47,
  83         OP_ST,
  84         OP_ISTP,
  85         OP_DSTP,
  86         OP_SWPN,
  87         OP_DUPN,
  88         OP_POPV,
  89         OP_POPE,
  90         OP_POPA,
  91         OP_JMPZ,
  92         OP_DS,
  93         OP_IS,
  94         OP_DPRA,
  95         OP_DPOA,
  96         OP_IPRA,
  97         OP_IPOA,
  98         OP_EXPT,
  99         OP_PSHE,
 100         OP_PSHA,
 101         OP_DYNA,
 102         OP_EXPV = 0x5c,
 103         OP_COPY = 0x80,
 104         OP_REVA,
 105         OP_DSC,
 106         OP_ISC,
 107         OP_WAIT,
 108         OP_VS,
 109         OP_CMPA = 0xc0,
 110         OP_VSC,
 111 };
 112
 113 struct altera_procinfo {
 114         char                    *name;
 115         u8                      attrs;
 116         struct altera_procinfo  *next;
 117 };
 118
 119 /* This function checks if enough parameters are available on the stack. */
 120 static int altera_check_stack(int stack_ptr, int count, int *status)
 121 {
 122         if (stack_ptr < count) {
 123                 *status = -EOVERFLOW;
 124                 return 0;
 125         }
 126
 127         return 1;
 128 }
 129
 130 static void altera_export_int(char *key, s32 value)
 131 {
 132         dprintk("Export: key = \"%s\", value = %d\n", key, value);
 133 }
 134
 135 #define HEX_LINE_CHARS 72
 136 #define HEX_LINE_BITS (HEX_LINE_CHARS * 4)
 137
 138 static void altera_export_bool_array(char *key, u8 *data, s32 count)
 139 {
 140         char string[HEX_LINE_CHARS + 1];
 141         s32 i, offset;
 142         u32 size, line, lines, linebits, value, j, k;
 143
 144         if (count > HEX_LINE_BITS) {
 145                 dprintk("Export: key = \"%s\", %d bits, value = HEX\n",
 146                                                         key, count);
 147                 lines = (count + (HEX_LINE_BITS - 1)) / HEX_LINE_BITS;
 148
 149                 for (line = 0; line < lines; ++line) {
 150                         if (line < (lines - 1)) {
 151                                 linebits = HEX_LINE_BITS;
 152                                 size = HEX_LINE_CHARS;
 153                                 offset = count - ((line + 1) * HEX_LINE_BITS);
 154                         } else {
 155                                 linebits =
 156                                         count - ((lines - 1) * HEX_LINE_BITS);
 157                                 size = (linebits + 3) / 4;
 158                                 offset = 0L;
 159                         }
 160
 161                         string[size] = '\0';
 162                         j = size - 1;
 163                         value = 0;
 164
 165                         for (k = 0; k < linebits; ++k) {
 166                                 i = k + offset;
 167                                 if (data[i >> 3] & (1 << (i & 7)))
 168                                         value |= (1 << (i & 3));
 169                                 if ((i & 3) == 3) {
 170                                         sprintf(&string[j], "%1x", value);
 171                                         value = 0;
 172                                         --j;
 173                                 }
 174                         }
 175                         if ((k & 3) > 0)
 176                                 sprintf(&string[j], "%1x", value);
 177
 178                         dprintk("%s\n", string);
 179                 }
 180
 181         } else {
 182                 size = (count + 3) / 4;
 183                 string[size] = '\0';
 184                 j = size - 1;
 185                 value = 0;
 186
 187                 for (i = 0; i < count; ++i) {
 188                         if (data[i >> 3] & (1 << (i & 7)))
 189                                 value |= (1 << (i & 3));
 190                         if ((i & 3) == 3) {
 191                                 sprintf(&string[j], "%1x", value);
 192                                 value = 0;
 193                                 --j;
 194                         }
 195                 }
 196                 if ((i & 3) > 0)
 197                         sprintf(&string[j], "%1x", value);
 198
 199                 dprintk("Export: key = \"%s\", %d bits, value = HEX %s\n",
 200                         key, count, string);
 201         }
 202 }
 203
 204 static int altera_execute(struct altera_state *astate,
 205                                 u8 *p,
 206                                 s32 program_size,
 207                                 s32 *error_address,
 208                                 int *exit_code,
 209                                 int *format_version)
 210 {
 211         struct altera_config *aconf = astate->config;
 212         char *msg_buff = astate->msg_buff;
 213         long *stack = astate->stack;
 214         int status = 0;
 215         u32 first_word = 0L;
 216         u32 action_table = 0L;
 217         u32 proc_table = 0L;
 218         u32 str_table = 0L;
 219         u32 sym_table = 0L;
 220         u32 data_sect = 0L;
 221         u32 code_sect = 0L;
 222         u32 debug_sect = 0L;
 223         u32 action_count = 0L;
 224         u32 proc_count = 0L;
 225         u32 sym_count = 0L;
 226         long *vars = NULL;
 227         s32 *var_size = NULL;
 228         char *attrs = NULL;
 229         u8 *proc_attributes = NULL;
 230         u32 pc;
 231         u32 opcode_address;
 232         u32 args[3];
 233         u32 opcode;
 234         u32 name_id;
 235         u8 charbuf[4];
 236         long long_tmp;
 237         u32 variable_id;
 238         u8 *charptr_tmp;
 239         u8 *charptr_tmp2;
 240         long *longptr_tmp;
 241         int version = 0;
 242         int delta = 0;
 243         int stack_ptr = 0;
 244         u32 arg_count;
 245         int done = 0;
 246         int bad_opcode = 0;
 247         u32 count;
 248         u32 index;
 249         u32 index2;
 250         s32 long_count;
 251         s32 long_idx;
 252         s32 long_idx2;
 253         u32 i;
 254         u32 j;
 255         u32 uncomp_size;
 256         u32 offset;
 257         u32 value;
 258         int current_proc = 0;
 259         int reverse;
 260
 261         char *name;
 262
 263         dprintk("%s\n", __func__);
 264
 265         /* Read header information */
 266         if (program_size > 52L) {
 267                 first_word    = get_unaligned_be32(&p[0]);
 268                 version = (first_word & 1L);
 269                 *format_version = version + 1;
 270                 delta = version * 8;
 271
 272                 action_table  = get_unaligned_be32(&p[4]);
 273                 proc_table    = get_unaligned_be32(&p[8]);
 274                 str_table  = get_unaligned_be32(&p[4 + delta]);
 275                 sym_table  = get_unaligned_be32(&p[16 + delta]);
 276                 data_sect  = get_unaligned_be32(&p[20 + delta]);
 277                 code_sect  = get_unaligned_be32(&p[24 + delta]);
 278                 debug_sect = get_unaligned_be32(&p[28 + delta]);
 279                 action_count  = get_unaligned_be32(&p[40 + delta]);
 280                 proc_count    = get_unaligned_be32(&p[44 + delta]);
 281                 sym_count  = get_unaligned_be32(&p[48 + (2 * delta)]);
 282         }
 283
 284         if ((first_word != 0x4A414D00L) && (first_word != 0x4A414D01L)) {
 285                 done = 1;
 286                 status = -EIO;
 287                 goto exit_done;
 288         }
 289
 290         if (sym_count <= 0)
 291                 goto exit_done;
 292
 293         vars = kcalloc(sym_count, sizeof(long), GFP_KERNEL);
 294
 295         if (vars == NULL)
 296                 status = -ENOMEM;
 297
 298         if (status == 0) {
 299                 var_size = kcalloc(sym_count, sizeof(s32), GFP_KERNEL);
 300
 301                 if (var_size == NULL)
 302                         status = -ENOMEM;
 303         }
 304
 305         if (status == 0) {
 306                 attrs = kzalloc(sym_count, GFP_KERNEL);
 307
 308                 if (attrs == NULL)
 309                         status = -ENOMEM;
 310         }
 311
 312         if ((status == 0) && (version > 0)) {
 313                 proc_attributes = kzalloc(proc_count, GFP_KERNEL);
 314
 315                 if (proc_attributes == NULL)
 316                         status = -ENOMEM;
 317         }
 318
 319         if (status != 0)
 320                 goto exit_done;
 321
 322         delta = version * 2;
 323
 324         for (i = 0; i < sym_count; ++i) {
 325                 offset = (sym_table + ((11 + delta) * i));
 326
 327                 value = get_unaligned_be32(&p[offset + 3 + delta]);
 328
 329                 attrs[i] = p[offset];
 330
 331                 /*
 332                  * use bit 7 of attribute byte to indicate that
 333                  * this buffer was dynamically allocated
 334                  * and should be freed later
 335                  */
 336                 attrs[i] &= 0x7f;
 337
 338                 var_size[i] = get_unaligned_be32(&p[offset + 7 + delta]);
 339
 340                 /*
 341                  * Attribute bits:
 342                  * bit 0: 0 = read-only, 1 = read-write
 343                  * bit 1: 0 = not compressed, 1 = compressed
 344                  * bit 2: 0 = not initialized, 1 = initialized
 345                  * bit 3: 0 = scalar, 1 = array
 346                  * bit 4: 0 = Boolean, 1 = integer
 347                  * bit 5: 0 = declared variable,
 348                  *      1 = compiler created temporary variable
 349                  */
 350
 351                 if ((attrs[i] & 0x0c) == 0x04)
 352                         /* initialized scalar variable */
 353                         vars[i] = value;
 354                 else if ((attrs[i] & 0x1e) == 0x0e) {
 355                         /* initialized compressed Boolean array */
 356                         uncomp_size = get_unaligned_le32(&p[data_sect + value]);
 357
 358                         /* allocate a buffer for the uncompressed data */
 359                         vars[i] = (long)kzalloc(uncomp_size, GFP_KERNEL);
 360                         if (vars[i] == 0L)
 361                                 status = -ENOMEM;
 362                         else {
 363                                 /* set flag so buffer will be freed later */
 364                                 attrs[i] |= 0x80;
 365
 366                                 /* uncompress the data */
 367                                 if (altera_shrink(&p[data_sect + value],
 368                                                 var_size[i],
 369                                                 (u8 *)vars[i],
 370                                                 uncomp_size,
 371                                                 version) != uncomp_size)
 372                                         /* decompression failed */
 373                                         status = -EIO;
 374                                 else
 375                                         var_size[i] = uncomp_size * 8L;
 376
 377                         }
 378                 } else if ((attrs[i] & 0x1e) == 0x0c) {
 379                         /* initialized Boolean array */
 380                         vars[i] = value + data_sect + (long)p;
 381                 } else if ((attrs[i] & 0x1c) == 0x1c) {
 382                         /* initialized integer array */
 383                         vars[i] = value + data_sect;
 384                 } else if ((attrs[i] & 0x0c) == 0x08) {
 385                         /* uninitialized array */
 386
 387                         /* flag attrs so that memory is freed */
 388                         attrs[i] |= 0x80;
 389
 390                         if (var_size[i] > 0) {
 391                                 u32 size;
 392
 393                                 if (attrs[i] & 0x10)
 394                                         /* integer array */
 395                                         size = (var_size[i] * sizeof(s32));
 396                                 else
 397                                         /* Boolean array */
 398                                         size = ((var_size[i] + 7L) / 8L);
 399
 400                                 vars[i] = (long)kzalloc(size, GFP_KERNEL);
 401
 402                                 if (vars[i] == 0) {
 403                                         status = -ENOMEM;
 404                                 } else {
 405                                         /* zero out memory */
 406                                         for (j = 0; j < size; ++j)
 407                                                 ((u8 *)(vars[i]))[j] = 0;
 408
 409                                 }
 410                         } else
 411                                 vars[i] = 0;
 412
 413                 } else
 414                         vars[i] = 0;
 415
 416         }
 417
 418 exit_done:
 419         if (status != 0)
 420                 done = 1;
 421
 422         altera_jinit(astate);
 423
 424         pc = code_sect;
 425         msg_buff[0] = '\0';
 426
 427         /*
 428          * For JBC version 2, we will execute the procedures corresponding to
 429          * the selected ACTION
 430          */
 431         if (version > 0) {
 432                 if (aconf->action == NULL) {
 433                         status = -EINVAL;
 434                         done = 1;
 435                 } else {
 436                         int action_found = 0;
 437                         for (i = 0; (i < action_count) && !action_found; ++i) {
 438                                 name_id = get_unaligned_be32(&p[action_table +
 439                                                                 (12 * i)]);
 440
 441                                 name = &p[str_table + name_id];
 442
 443                                 if (strncasecmp(aconf->action, name, strlen(name)) == 0) {
 444                                         action_found = 1;
 445                                         current_proc =
 446                                                 get_unaligned_be32(&p[action_table +
 447                                                                 (12 * i) + 8]);
 448                                 }
 449                         }
 450
 451                         if (!action_found) {
 452                                 status = -EINVAL;
 453                                 done = 1;
 454                         }
 455                 }
 456
 457                 if (status == 0) {
 458                         int first_time = 1;
 459                         i = current_proc;
 460                         while ((i != 0) || first_time) {
 461                                 first_time = 0;
 462                                 /* check procedure attribute byte */
 463                                 proc_attributes[i] =
 464                                                 (p[proc_table +
 465                                                                 (13 * i) + 8] &
 466                                                                         0x03);
 467
 468                                 /*
 469                                  * BIT0 - OPTIONAL
 470                                  * BIT1 - RECOMMENDED
 471                                  * BIT6 - FORCED OFF
 472                                  * BIT7 - FORCED ON
 473                                  */
 474
 475                                 i = get_unaligned_be32(&p[proc_table +
 476                                                         (13 * i) + 4]);
 477                         }
 478
 479                         /*
 480                          * Set current_proc to the first procedure
 481                          * to be executed
 482                          */
 483                         i = current_proc;
 484                         while ((i != 0) &&
 485                                 ((proc_attributes[i] == 1) ||
 486                                 ((proc_attributes[i] & 0xc0) == 0x40))) {
 487                                 i = get_unaligned_be32(&p[proc_table +
 488                                                         (13 * i) + 4]);
 489                         }
 490
 491                         if ((i != 0) || ((i == 0) && (current_proc == 0) &&
 492                                 ((proc_attributes[0] != 1) &&
 493                                 ((proc_attributes[0] & 0xc0) != 0x40)))) {
 494                                 current_proc = i;
 495                                 pc = code_sect +
 496                                         get_unaligned_be32(&p[proc_table +
 497                                                                 (13 * i) + 9]);
 498                                 if ((pc < code_sect) || (pc >= debug_sect))
 499                                         status = -ERANGE;
 500                         } else
 501                                 /* there are no procedures to execute! */
 502                                 done = 1;
 503
 504                 }
 505         }
 506
 507         msg_buff[0] = '\0';
 508
 509         while (!done) {
 510                 opcode = (p[pc] & 0xff);
 511                 opcode_address = pc;
 512                 ++pc;
 513
 514                 if (debug > 1)
 515                         printk("opcode: %02x\n", opcode);
 516
 517                 arg_count = (opcode >> 6) & 3;
 518                 for (i = 0; i < arg_count; ++i) {
 519                         args[i] = get_unaligned_be32(&p[pc]);
 520                         pc += 4;
 521                 }
 522
 523                 switch (opcode) {
 524                 case OP_NOP:
 525                         break;
 526                 case OP_DUP:
 527                         if (altera_check_stack(stack_ptr, 1, &status)) {
 528                                 stack[stack_ptr] = stack[stack_ptr - 1];
 529                                 ++stack_ptr;
 530                         }
 531                         break;
 532                 case OP_SWP:
 533                         if (altera_check_stack(stack_ptr, 2, &status))
 534                                 swap(stack[stack_ptr - 2], stack[stack_ptr - 1]);
 535                         break;
 536                 case OP_ADD:
 537                         if (altera_check_stack(stack_ptr, 2, &status)) {
 538                                 --stack_ptr;
 539                                 stack[stack_ptr - 1] += stack[stack_ptr];
 540                         }
 541                         break;
 542                 case OP_SUB:
 543                         if (altera_check_stack(stack_ptr, 2, &status)) {
 544                                 --stack_ptr;
 545                                 stack[stack_ptr - 1] -= stack[stack_ptr];
 546                         }
 547                         break;
 548                 case OP_MULT:
 549                         if (altera_check_stack(stack_ptr, 2, &status)) {
 550                                 --stack_ptr;
 551                                 stack[stack_ptr - 1] *= stack[stack_ptr];
 552                         }
 553                         break;
 554                 case OP_DIV:
 555                         if (altera_check_stack(stack_ptr, 2, &status)) {
 556                                 --stack_ptr;
 557                                 stack[stack_ptr - 1] /= stack[stack_ptr];
 558                         }
 559                         break;
 560                 case OP_MOD:
 561                         if (altera_check_stack(stack_ptr, 2, &status)) {
 562                                 --stack_ptr;
 563                                 stack[stack_ptr - 1] %= stack[stack_ptr];
 564                         }
 565                         break;
 566                 case OP_SHL:
 567                         if (altera_check_stack(stack_ptr, 2, &status)) {
 568                                 --stack_ptr;
 569                                 stack[stack_ptr - 1] <<= stack[stack_ptr];
 570                         }
 571                         break;
 572                 case OP_SHR:
 573                         if (altera_check_stack(stack_ptr, 2, &status)) {
 574                                 --stack_ptr;
 575                                 stack[stack_ptr - 1] >>= stack[stack_ptr];
 576                         }
 577                         break;
 578                 case OP_NOT:
 579                         if (altera_check_stack(stack_ptr, 1, &status))
 580                                 stack[stack_ptr - 1] ^= (-1L);
 581
 582                         break;
 583                 case OP_AND:
 584                         if (altera_check_stack(stack_ptr, 2, &status)) {
 585                                 --stack_ptr;
 586                                 stack[stack_ptr - 1] &= stack[stack_ptr];
 587                         }
 588                         break;
 589                 case OP_OR:
 590                         if (altera_check_stack(stack_ptr, 2, &status)) {
 591                                 --stack_ptr;
 592                                 stack[stack_ptr - 1] |= stack[stack_ptr];
 593                         }
 594                         break;
 595                 case OP_XOR:
 596                         if (altera_check_stack(stack_ptr, 2, &status)) {
 597                                 --stack_ptr;
 598                                 stack[stack_ptr - 1] ^= stack[stack_ptr];
 599                         }
 600                         break;
 601                 case OP_INV:
 602                         if (!altera_check_stack(stack_ptr, 1, &status))
 603                                 break;
 604                         stack[stack_ptr - 1] = stack[stack_ptr - 1] ? 0L : 1L;
 605                         break;
 606                 case OP_GT:
 607                         if (!altera_check_stack(stack_ptr, 2, &status))
 608                                 break;
 609                         --stack_ptr;
 610                         stack[stack_ptr - 1] =
 611                                 (stack[stack_ptr - 1] > stack[stack_ptr]) ?
 612                                                                         1L : 0L;
 613
 614                         break;
 615                 case OP_LT:
 616                         if (!altera_check_stack(stack_ptr, 2, &status))
 617                                 break;
 618                         --stack_ptr;
 619                         stack[stack_ptr - 1] =
 620                                 (stack[stack_ptr - 1] < stack[stack_ptr]) ?
 621                                                                         1L : 0L;
 622
 623                         break;
 624                 case OP_RET:
 625                         if ((version > 0) && (stack_ptr == 0)) {
 626                                 /*
 627                                  * We completed one of the main procedures
 628                                  * of an ACTION.
 629                                  * Find the next procedure
 630                                  * to be executed and jump to it.
 631                                  * If there are no more procedures, then EXIT.
 632                                  */
 633                                 i = get_unaligned_be32(&p[proc_table +
 634                                                 (13 * current_proc) + 4]);
 635                                 while ((i != 0) &&
 636                                         ((proc_attributes[i] == 1) ||
 637                                         ((proc_attributes[i] & 0xc0) == 0x40)))
 638                                         i = get_unaligned_be32(&p[proc_table +
 639                                                                 (13 * i) + 4]);
 640
 641                                 if (i == 0) {
 642                                         /* no procedures to execute! */
 643                                         done = 1;
 644                                         *exit_code = 0; /* success */
 645                                 } else {
 646                                         current_proc = i;
 647                                         pc = code_sect + get_unaligned_be32(
 648                                                                 &p[proc_table +
 649                                                                 (13 * i) + 9]);
 650                                         if ((pc < code_sect) ||
 651                                             (pc >= debug_sect))
 652                                                 status = -ERANGE;
 653                                 }
 654
 655                         } else
 656                                 if (altera_check_stack(stack_ptr, 1, &status)) {
 657                                         pc = stack[--stack_ptr] + code_sect;
 658                                         if ((pc <= code_sect) ||
 659                                             (pc >= debug_sect))
 660                                                 status = -ERANGE;
 661
 662                                 }
 663
 664                         break;
 665                 case OP_CMPS:
 666                         /*
 667                          * Array short compare
 668                          * ...stack 0 is source 1 value
 669                          * ...stack 1 is source 2 value
 670                          * ...stack 2 is mask value
 671                          * ...stack 3 is count
 672                          */
 673                         if (altera_check_stack(stack_ptr, 4, &status)) {
 674                                 s32 a = stack[--stack_ptr];
 675                                 s32 b = stack[--stack_ptr];
 676                                 long_tmp = stack[--stack_ptr];
 677                                 count = stack[stack_ptr - 1];
 678
 679                                 if ((count < 1) || (count > 32))
 680                                         status = -ERANGE;
 681                                 else {
 682                                         long_tmp &= ((-1L) >> (32 - count));
 683
 684                                         stack[stack_ptr - 1] =
 685                                         ((a & long_tmp) == (b & long_tmp))
 686                                                                 ? 1L : 0L;
 687                                 }
 688                         }
 689                         break;
 690                 case OP_PINT:
 691                         /*
 692                          * PRINT add integer
 693                          * ...stack 0 is integer value
 694                          */
 695                         if (!altera_check_stack(stack_ptr, 1, &status))
 696                                 break;
 697                         sprintf(&msg_buff[strlen(msg_buff)],
 698                                         "%ld", stack[--stack_ptr]);
 699                         break;
 700                 case OP_PRNT:
 701                         /* PRINT finish */
 702                         if (debug)
 703                                 printk(msg_buff, "\n");
 704
 705                         msg_buff[0] = '\0';
 706                         break;
 707                 case OP_DSS:
 708                         /*
 709                          * DRSCAN short
 710                          * ...stack 0 is scan data
 711                          * ...stack 1 is count
 712                          */
 713                         if (!altera_check_stack(stack_ptr, 2, &status))
 714                                 break;
 715                         long_tmp = stack[--stack_ptr];
 716                         count = stack[--stack_ptr];
 717                         put_unaligned_le32(long_tmp, &charbuf[0]);
 718                         status = altera_drscan(astate, count, charbuf, 0);
 719                         break;
 720                 case OP_DSSC:
 721                         /*
 722                          * DRSCAN short with capture
 723                          * ...stack 0 is scan data
 724                          * ...stack 1 is count
 725                          */
 726                         if (!altera_check_stack(stack_ptr, 2, &status))
 727                                 break;
 728                         long_tmp = stack[--stack_ptr];
 729                         count = stack[stack_ptr - 1];
 730                         put_unaligned_le32(long_tmp, &charbuf[0]);
 731                         status = altera_swap_dr(astate, count, charbuf,
 732                                                         0, charbuf, 0);
 733                         stack[stack_ptr - 1] = get_unaligned_le32(&charbuf[0]);
 734                         break;
 735                 case OP_ISS:
 736                         /*
 737                          * IRSCAN short
 738                          * ...stack 0 is scan data
 739                          * ...stack 1 is count
 740                          */
 741                         if (!altera_check_stack(stack_ptr, 2, &status))
 742                                 break;
 743                         long_tmp = stack[--stack_ptr];
 744                         count = stack[--stack_ptr];
 745                         put_unaligned_le32(long_tmp, &charbuf[0]);
 746                         status = altera_irscan(astate, count, charbuf, 0);
 747                         break;
 748                 case OP_ISSC:
 749                         /*
 750                          * IRSCAN short with capture
 751                          * ...stack 0 is scan data
 752                          * ...stack 1 is count
 753                          */
 754                         if (!altera_check_stack(stack_ptr, 2, &status))
 755                                 break;
 756                         long_tmp = stack[--stack_ptr];
 757                         count = stack[stack_ptr - 1];
 758                         put_unaligned_le32(long_tmp, &charbuf[0]);
 759                         status = altera_swap_ir(astate, count, charbuf,
 760                                                         0, charbuf, 0);
 761                         stack[stack_ptr - 1] = get_unaligned_le32(&charbuf[0]);
 762                         break;
 763                 case OP_DPR:
 764                         if (!altera_check_stack(stack_ptr, 1, &status))
 765                                 break;
 766                         count = stack[--stack_ptr];
 767                         status = altera_set_dr_pre(&astate->js, count, 0, NULL);
 768                         break;
 769                 case OP_DPRL:
 770                         /*
 771                          * DRPRE with literal data
 772                          * ...stack 0 is count
 773                          * ...stack 1 is literal data
 774                          */
 775                         if (!altera_check_stack(stack_ptr, 2, &status))
 776                                 break;
 777                         count = stack[--stack_ptr];
 778                         long_tmp = stack[--stack_ptr];
 779                         put_unaligned_le32(long_tmp, &charbuf[0]);
 780                         status = altera_set_dr_pre(&astate->js, count, 0,
 781                                                 charbuf);
 782                         break;
 783                 case OP_DPO:
 784                         /*
 785                          * DRPOST
 786                          * ...stack 0 is count
 787                          */
 788                         if (altera_check_stack(stack_ptr, 1, &status)) {
 789                                 count = stack[--stack_ptr];
 790                                 status = altera_set_dr_post(&astate->js, count,
 791                                                                 0, NULL);
 792                         }
 793                         break;
 794                 case OP_DPOL:
 795                         /*
 796                          * DRPOST with literal data
 797                          * ...stack 0 is count
 798                          * ...stack 1 is literal data
 799                          */
 800                         if (!altera_check_stack(stack_ptr, 2, &status))
 801                                 break;
 802                         count = stack[--stack_ptr];
 803                         long_tmp = stack[--stack_ptr];
 804                         put_unaligned_le32(long_tmp, &charbuf[0]);
 805                         status = altera_set_dr_post(&astate->js, count, 0,
 806                                                         charbuf);
 807                         break;
 808                 case OP_IPR:
 809                         if (altera_check_stack(stack_ptr, 1, &status)) {
 810                                 count = stack[--stack_ptr];
 811                                 status = altera_set_ir_pre(&astate->js, count,
 812                                                                 0, NULL);
 813                         }
 814                         break;
 815                 case OP_IPRL:
 816                         /*
 817                          * IRPRE with literal data
 818                          * ...stack 0 is count
 819                          * ...stack 1 is literal data
 820                          */
 821                         if (altera_check_stack(stack_ptr, 2, &status)) {
 822                                 count = stack[--stack_ptr];
 823                                 long_tmp = stack[--stack_ptr];
 824                                 put_unaligned_le32(long_tmp, &charbuf[0]);
 825                                 status = altera_set_ir_pre(&astate->js, count,
 826                                                         0, charbuf);
 827                         }
 828                         break;
 829                 case OP_IPO:
 830                         /*
 831                          * IRPOST
 832                          * ...stack 0 is count
 833                          */
 834                         if (altera_check_stack(stack_ptr, 1, &status)) {
 835                                 count = stack[--stack_ptr];
 836                                 status = altera_set_ir_post(&astate->js, count,
 837                                                         0, NULL);
 838                         }
 839                         break;
 840                 case OP_IPOL:
 841                         /*
 842                          * IRPOST with literal data
 843                          * ...stack 0 is count
 844                          * ...stack 1 is literal data
 845                          */
 846                         if (!altera_check_stack(stack_ptr, 2, &status))
 847                                 break;
 848                         count = stack[--stack_ptr];
 849                         long_tmp = stack[--stack_ptr];
 850                         put_unaligned_le32(long_tmp, &charbuf[0]);
 851                         status = altera_set_ir_post(&astate->js, count, 0,
 852                                                         charbuf);
 853                         break;
 854                 case OP_PCHR:
 855                         if (altera_check_stack(stack_ptr, 1, &status)) {
 856                                 u8 ch;
 857                                 count = strlen(msg_buff);
 858                                 ch = (char) stack[--stack_ptr];
 859                                 if ((ch < 1) || (ch > 127)) {
 860                                         /*
 861                                          * character code out of range
 862                                          * instead of flagging an error,
 863                                          * force the value to 127
 864                                          */
 865                                         ch = 127;
 866                                 }
 867                                 msg_buff[count] = ch;
 868                                 msg_buff[count + 1] = '\0';
 869                         }
 870                         break;
 871                 case OP_EXIT:
 872                         if (altera_check_stack(stack_ptr, 1, &status))
 873                                 *exit_code = stack[--stack_ptr];
 874
 875                         done = 1;
 876                         break;
 877                 case OP_EQU:
 878                         if (!altera_check_stack(stack_ptr, 2, &status))
 879                                 break;
 880                         --stack_ptr;
 881                         stack[stack_ptr - 1] =
 882                                 (stack[stack_ptr - 1] == stack[stack_ptr]) ?
 883                                                                         1L : 0L;
 884                         break;
 885                 case OP_POPT:
 886                         if (altera_check_stack(stack_ptr, 1, &status))
 887                                 --stack_ptr;
 888
 889                         break;
 890                 case OP_ABS:
 891                         if (!altera_check_stack(stack_ptr, 1, &status))
 892                                 break;
 893                         if (stack[stack_ptr - 1] < 0)
 894                                 stack[stack_ptr - 1] = 0 - stack[stack_ptr - 1];
 895
 896                         break;
 897                 case OP_BCH0:
 898                         /*
 899                          * Batch operation 0
 900                          * SWP
 901                          * SWPN 7
 902                          * SWP
 903                          * SWPN 6
 904                          * DUPN 8
 905                          * SWPN 2
 906                          * SWP
 907                          * DUPN 6
 908                          * DUPN 6
 909                          */
 910
 911                         /* SWP  */
 912                         if (altera_check_stack(stack_ptr, 2, &status))
 913                                 swap(stack[stack_ptr - 2], stack[stack_ptr - 1]);
 914
 915                         /* SWPN 7 */
 916                         index = 7 + 1;
 917                         if (altera_check_stack(stack_ptr, index, &status))
 918                                 swap(stack[stack_ptr - index], stack[stack_ptr - 1]);
 919
 920                         /* SWP  */
 921                         if (altera_check_stack(stack_ptr, 2, &status))
 922                                 swap(stack[stack_ptr - 2], stack[stack_ptr - 1]);
 923
 924                         /* SWPN 6 */
 925                         index = 6 + 1;
 926                         if (altera_check_stack(stack_ptr, index, &status))
 927                                 swap(stack[stack_ptr - index], stack[stack_ptr - 1]);
 928
 929                         /* DUPN 8 */
 930                         index = 8 + 1;
 931                         if (altera_check_stack(stack_ptr, index, &status)) {
 932                                 stack[stack_ptr] = stack[stack_ptr - index];
 933                                 ++stack_ptr;
 934                         }
 935
 936                         /* SWPN 2 */
 937                         index = 2 + 1;
 938                         if (altera_check_stack(stack_ptr, index, &status))
 939                                 swap(stack[stack_ptr - index], stack[stack_ptr - 1]);
 940
 941                         /* SWP  */
 942                         if (altera_check_stack(stack_ptr, 2, &status))
 943                                 swap(stack[stack_ptr - 2], stack[stack_ptr - 1]);
 944
 945                         /* DUPN 6 */
 946                         index = 6 + 1;
 947                         if (altera_check_stack(stack_ptr, index, &status)) {
 948                                 stack[stack_ptr] = stack[stack_ptr - index];
 949                                 ++stack_ptr;
 950                         }
 951
 952                         /* DUPN 6 */
 953                         index = 6 + 1;
 954                         if (altera_check_stack(stack_ptr, index, &status)) {
 955                                 stack[stack_ptr] = stack[stack_ptr - index];
 956                                 ++stack_ptr;
 957                         }
 958                         break;
 959                 case OP_PSH0:
 960                         stack[stack_ptr++] = 0;
 961                         break;
 962                 case OP_PSHL:
 963                         stack[stack_ptr++] = (s32) args[0];
 964                         break;
 965                 case OP_PSHV:
 966                         stack[stack_ptr++] = vars[args[0]];
 967                         break;
 968                 case OP_JMP:
 969                         pc = args[0] + code_sect;
 970                         if ((pc < code_sect) || (pc >= debug_sect))
 971                                 status = -ERANGE;
 972                         break;
 973                 case OP_CALL:
 974                         stack[stack_ptr++] = pc;
 975                         pc = args[0] + code_sect;
 976                         if ((pc < code_sect) || (pc >= debug_sect))
 977                                 status = -ERANGE;
 978                         break;
 979                 case OP_NEXT:
 980                         /*
 981                          * Process FOR / NEXT loop
 982                          * ...argument 0 is variable ID
 983                          * ...stack 0 is step value
 984                          * ...stack 1 is end value
 985                          * ...stack 2 is top address
 986                          */
 987                         if (altera_check_stack(stack_ptr, 3, &status)) {
 988                                 s32 step = stack[stack_ptr - 1];
 989                                 s32 end = stack[stack_ptr - 2];
 990                                 s32 top = stack[stack_ptr - 3];
 991                                 s32 iterator = vars[args[0]];
 992                                 int break_out = 0;
 993
 994                                 if (step < 0) {
 995                                         if (iterator <= end)
 996                                                 break_out = 1;
 997                                 } else if (iterator >= end)
 998                                         break_out = 1;
 999
1000                                 if (break_out) {
1001                                         stack_ptr -= 3;
1002                                 } else {
1003                                         vars[args[0]] = iterator + step;
1004                                         pc = top + code_sect;
1005                                         if ((pc < code_sect) ||
1006                                             (pc >= debug_sect))
1007                                                 status = -ERANGE;
1008                                 }
1009                         }
1010                         break;
1011                 case OP_PSTR:
1012                         /*
1013                          * PRINT add string
1014                          * ...argument 0 is string ID
1015                          */
1016                         count = strlen(msg_buff);
1017                         strlcpy(&msg_buff[count],
1018                                 &p[str_table + args[0]],
1019                                 ALTERA_MESSAGE_LENGTH - count);
1020                         break;
1021                 case OP_SINT:
1022                         /*
1023                          * STATE intermediate state
1024                          * ...argument 0 is state code
1025                          */
1026                         status = altera_goto_jstate(astate, args[0]);
1027                         break;
1028                 case OP_ST:
1029                         /*
1030                          * STATE final state
1031                          * ...argument 0 is state code
1032                          */
1033                         status = altera_goto_jstate(astate, args[0]);
1034                         break;
1035                 case OP_ISTP:
1036                         /*
1037                          * IRSTOP state
1038                          * ...argument 0 is state code
1039                          */
1040                         status = altera_set_irstop(&astate->js, args[0]);
1041                         break;
1042                 case OP_DSTP:
1043                         /*
1044                          * DRSTOP state
1045                          * ...argument 0 is state code
1046                          */
1047                         status = altera_set_drstop(&astate->js, args[0]);
1048                         break;
1049
1050                 case OP_SWPN:
1051                         /*
1052                          * Exchange top with Nth stack value
1053                          * ...argument 0 is 0-based stack entry
1054                          * to swap with top element
1055                          */
1056                         index = (args[0]) + 1;
1057                         if (altera_check_stack(stack_ptr, index, &status))
1058                                 swap(stack[stack_ptr - index], stack[stack_ptr - 1]);
1059                         break;
1060                 case OP_DUPN:
1061                         /*
1062                          * Duplicate Nth stack value
1063                          * ...argument 0 is 0-based stack entry to duplicate
1064                          */
1065                         index = (args[0]) + 1;
1066                         if (altera_check_stack(stack_ptr, index, &status)) {
1067                                 stack[stack_ptr] = stack[stack_ptr - index];
1068                                 ++stack_ptr;
1069                         }
1070                         break;
1071                 case OP_POPV:
1072                         /*
1073                          * Pop stack into scalar variable
1074                          * ...argument 0 is variable ID
1075                          * ...stack 0 is value
1076                          */
1077                         if (altera_check_stack(stack_ptr, 1, &status))
1078                                 vars[args[0]] = stack[--stack_ptr];
1079
1080                         break;
1081                 case OP_POPE:
1082                         /*
1083                          * Pop stack into integer array element
1084                          * ...argument 0 is variable ID
1085                          * ...stack 0 is array index
1086                          * ...stack 1 is value
1087                          */
1088                         if (!altera_check_stack(stack_ptr, 2, &status))
1089                                 break;
1090                         variable_id = args[0];
1091
1092                         /*
1093                          * If variable is read-only,
1094                          * convert to writable array
1095                          */
1096                         if ((version > 0) &&
1097                                 ((attrs[variable_id] & 0x9c) == 0x1c)) {
1098                                 /* Allocate a writable buffer for this array */
1099                                 count = var_size[variable_id];
1100                                 long_tmp = vars[variable_id];
1101                                 longptr_tmp = kcalloc(count, sizeof(long),
1102                                                                 GFP_KERNEL);
1103                                 vars[variable_id] = (long)longptr_tmp;
1104
1105                                 if (vars[variable_id] == 0) {
1106                                         status = -ENOMEM;
1107                                         break;
1108                                 }
1109
1110                                 /* copy previous contents into buffer */
1111                                 for (i = 0; i < count; ++i) {
1112                                         longptr_tmp[i] =
1113                                                 get_unaligned_be32(&p[long_tmp]);
1114                                         long_tmp += sizeof(long);
1115                                 }
1116
1117                                 /*
1118                                  * set bit 7 - buffer was
1119                                  * dynamically allocated
1120                                  */
1121                                 attrs[variable_id] |= 0x80;
1122
1123                                 /* clear bit 2 - variable is writable */
1124                                 attrs[variable_id] &= ~0x04;
1125                                 attrs[variable_id] |= 0x01;
1126
1127                         }
1128
1129                         /* check that variable is a writable integer array */
1130                         if ((attrs[variable_id] & 0x1c) != 0x18)
1131                                 status = -ERANGE;
1132                         else {
1133                                 longptr_tmp = (long *)vars[variable_id];
1134
1135                                 /* pop the array index */
1136                                 index = stack[--stack_ptr];
1137
1138                                 /* pop the value and store it into the array */
1139                                 longptr_tmp[index] = stack[--stack_ptr];
1140                         }
1141
1142                         break;
1143                 case OP_POPA:
1144                         /*
1145                          * Pop stack into Boolean array
1146                          * ...argument 0 is variable ID
1147                          * ...stack 0 is count
1148                          * ...stack 1 is array index
1149                          * ...stack 2 is value
1150                          */
1151                         if (!altera_check_stack(stack_ptr, 3, &status))
1152                                 break;
1153                         variable_id = args[0];
1154
1155                         /*
1156                          * If variable is read-only,
1157                          * convert to writable array
1158                          */
1159                         if ((version > 0) &&
1160                                 ((attrs[variable_id] & 0x9c) == 0x0c)) {
1161                                 /* Allocate a writable buffer for this array */
1162                                 long_tmp =
1163                                         (var_size[variable_id] + 7L) >> 3L;
1164                                 charptr_tmp2 = (u8 *)vars[variable_id];
1165                                 charptr_tmp =
1166                                         kzalloc(long_tmp, GFP_KERNEL);
1167                                 vars[variable_id] = (long)charptr_tmp;
1168
1169                                 if (vars[variable_id] == 0) {
1170                                         status = -ENOMEM;
1171                                         break;
1172                                 }
1173
1174                                 /* zero the buffer */
1175                                 for (long_idx = 0L;
1176                                         long_idx < long_tmp;
1177                                         ++long_idx) {
1178                                         charptr_tmp[long_idx] = 0;
1179                                 }
1180
1181                                 /* copy previous contents into buffer */
1182                                 for (long_idx = 0L;
1183                                         long_idx < var_size[variable_id];
1184                                         ++long_idx) {
1185                                         long_idx2 = long_idx;
1186
1187                                         if (charptr_tmp2[long_idx2 >> 3] &
1188                                                 (1 << (long_idx2 & 7))) {
1189                                                 charptr_tmp[long_idx >> 3] |=
1190                                                         (1 << (long_idx & 7));
1191                                         }
1192                                 }
1193
1194                                 /*
1195                                  * set bit 7 - buffer was
1196                                  * dynamically allocated
1197                                  */
1198                                 attrs[variable_id] |= 0x80;
1199
1200                                 /* clear bit 2 - variable is writable */
1201                                 attrs[variable_id] &= ~0x04;
1202                                 attrs[variable_id] |= 0x01;
1203
1204                         }
1205
1206                         /*
1207                          * check that variable is
1208                          * a writable Boolean array
1209                          */
1210                         if ((attrs[variable_id] & 0x1c) != 0x08) {
1211                                 status = -ERANGE;
1212                                 break;
1213                         }
1214
1215                         charptr_tmp = (u8 *)vars[variable_id];
1216
1217                         /* pop the count (number of bits to copy) */
1218                         long_count = stack[--stack_ptr];
1219
1220                         /* pop the array index */
1221                         long_idx = stack[--stack_ptr];
1222
1223                         reverse = 0;
1224
1225                         if (version > 0) {
1226                                 /*
1227                                  * stack 0 = array right index
1228                                  * stack 1 = array left index
1229                                  */
1230
1231                                 if (long_idx > long_count) {
1232                                         reverse = 1;
1233                                         long_tmp = long_count;
1234                                         long_count = 1 + long_idx -
1235                                                                 long_count;
1236                                         long_idx = long_tmp;
1237
1238                                         /* reverse POPA is not supported */
1239                                         status = -ERANGE;
1240                                         break;
1241                                 } else
1242                                         long_count = 1 + long_count -
1243                                                                 long_idx;
1244
1245                         }
1246
1247                         /* pop the data */
1248                         long_tmp = stack[--stack_ptr];
1249
1250                         if (long_count < 1) {
1251                                 status = -ERANGE;
1252                                 break;
1253                         }
1254
1255                         for (i = 0; i < long_count; ++i) {
1256                                 if (long_tmp & (1L << (s32) i))
1257                                         charptr_tmp[long_idx >> 3L] |=
1258                                                 (1L << (long_idx & 7L));
1259                                 else
1260                                         charptr_tmp[long_idx >> 3L] &=
1261                                                 ~(1L << (long_idx & 7L));
1262
1263                                 ++long_idx;
1264                         }
1265
1266                         break;
1267                 case OP_JMPZ:
1268                         /*
1269                          * Pop stack and branch if zero
1270                          * ...argument 0 is address
1271                          * ...stack 0 is condition value
1272                          */
1273                         if (altera_check_stack(stack_ptr, 1, &status)) {
1274                                 if (stack[--stack_ptr] == 0) {
1275                                         pc = args[0] + code_sect;
1276                                         if ((pc < code_sect) ||
1277                                             (pc >= debug_sect))
1278                                                 status = -ERANGE;
1279                                 }
1280                         }
1281                         break;
1282                 case OP_DS:
1283                 case OP_IS:
1284                         /*
1285                          * DRSCAN
1286                          * IRSCAN
1287                          * ...argument 0 is scan data variable ID
1288                          * ...stack 0 is array index
1289                          * ...stack 1 is count
1290                          */
1291                         if (!altera_check_stack(stack_ptr, 2, &status))
1292                                 break;
1293                         long_idx = stack[--stack_ptr];
1294                         long_count = stack[--stack_ptr];
1295                         reverse = 0;
1296                         if (version > 0) {
1297                                 /*
1298                                  * stack 0 = array right index
1299                                  * stack 1 = array left index
1300                                  * stack 2 = count
1301                                  */
1302                                 long_tmp = long_count;
1303                                 long_count = stack[--stack_ptr];
1304
1305                                 if (long_idx > long_tmp) {
1306                                         reverse = 1;
1307                                         long_idx = long_tmp;
1308                                 }
1309                         }
1310
1311                         charptr_tmp = (u8 *)vars[args[0]];
1312
1313                         if (reverse) {
1314                                 /*
1315                                  * allocate a buffer
1316                                  * and reverse the data order
1317                                  */
1318                                 charptr_tmp2 = charptr_tmp;
1319                                 charptr_tmp = kzalloc((long_count >> 3) + 1,
1320                                                                 GFP_KERNEL);
1321                                 if (charptr_tmp == NULL) {
1322                                         status = -ENOMEM;
1323                                         break;
1324                                 }
1325
1326                                 long_tmp = long_idx + long_count - 1;
1327                                 long_idx2 = 0;
1328                                 while (long_idx2 < long_count) {
1329                                         if (charptr_tmp2[long_tmp >> 3] &
1330                                                         (1 << (long_tmp & 7)))
1331                                                 charptr_tmp[long_idx2 >> 3] |=
1332                                                         (1 << (long_idx2 & 7));
1333                                         else
1334                                                 charptr_tmp[long_idx2 >> 3] &=
1335                                                         ~(1 << (long_idx2 & 7));
1336
1337                                         --long_tmp;
1338                                         ++long_idx2;
1339                                 }
1340                         }
1341
1342                         if (opcode == 0x51) /* DS */
1343                                 status = altera_drscan(astate, long_count,
1344                                                 charptr_tmp, long_idx);
1345                         else /* IS */
1346                                 status = altera_irscan(astate, long_count,
1347                                                 charptr_tmp, long_idx);
1348
1349                         if (reverse)
1350                                 kfree(charptr_tmp);
1351
1352                         break;
1353                 case OP_DPRA:
1354                         /*
1355                          * DRPRE with array data
1356                          * ...argument 0 is variable ID
1357                          * ...stack 0 is array index
1358                          * ...stack 1 is count
1359                          */
1360                         if (!altera_check_stack(stack_ptr, 2, &status))
1361                                 break;
1362                         index = stack[--stack_ptr];
1363                         count = stack[--stack_ptr];
1364
1365                         if (version > 0)
1366                                 /*
1367                                  * stack 0 = array right index
1368                                  * stack 1 = array left index
1369                                  */
1370                                 count = 1 + count - index;
1371
1372                         charptr_tmp = (u8 *)vars[args[0]];
1373                         status = altera_set_dr_pre(&astate->js, count, index,
1374                                                         charptr_tmp);
1375                         break;
1376                 case OP_DPOA:
1377                         /*
1378                          * DRPOST with array data
1379                          * ...argument 0 is variable ID
1380                          * ...stack 0 is array index
1381                          * ...stack 1 is count
1382                          */
1383                         if (!altera_check_stack(stack_ptr, 2, &status))
1384                                 break;
1385                         index = stack[--stack_ptr];
1386                         count = stack[--stack_ptr];
1387
1388                         if (version > 0)
1389                                 /*
1390                                  * stack 0 = array right index
1391                                  * stack 1 = array left index
1392                                  */
1393                                 count = 1 + count - index;
1394
1395                         charptr_tmp = (u8 *)vars[args[0]];
1396                         status = altera_set_dr_post(&astate->js, count, index,
1397                                                         charptr_tmp);
1398                         break;
1399                 case OP_IPRA:
1400                         /*
1401                          * IRPRE with array data
1402                          * ...argument 0 is variable ID
1403                          * ...stack 0 is array index
1404                          * ...stack 1 is count
1405                          */
1406                         if (!altera_check_stack(stack_ptr, 2, &status))
1407                                 break;
1408                         index = stack[--stack_ptr];
1409                         count = stack[--stack_ptr];
1410
1411                         if (version > 0)
1412                                 /*
1413                                  * stack 0 = array right index
1414                                  * stack 1 = array left index
1415                                  */
1416                                 count = 1 + count - index;
1417
1418                         charptr_tmp = (u8 *)vars[args[0]];
1419                         status = altera_set_ir_pre(&astate->js, count, index,
1420                                                         charptr_tmp);
1421
1422                         break;
1423                 case OP_IPOA:
1424                         /*
1425                          * IRPOST with array data
1426                          * ...argument 0 is variable ID
1427                          * ...stack 0 is array index
1428                          * ...stack 1 is count
1429                          */
1430                         if (!altera_check_stack(stack_ptr, 2, &status))
1431                                 break;
1432                         index = stack[--stack_ptr];
1433                         count = stack[--stack_ptr];
1434
1435                         if (version > 0)
1436                                 /*
1437                                  * stack 0 = array right index
1438                                  * stack 1 = array left index
1439                                  */
1440                                 count = 1 + count - index;
1441
1442                         charptr_tmp = (u8 *)vars[args[0]];
1443                         status = altera_set_ir_post(&astate->js, count, index,
1444                                                         charptr_tmp);
1445
1446                         break;
1447                 case OP_EXPT:
1448                         /*
1449                          * EXPORT
1450                          * ...argument 0 is string ID
1451                          * ...stack 0 is integer expression
1452                          */
1453                         if (altera_check_stack(stack_ptr, 1, &status)) {
1454                                 name = &p[str_table + args[0]];
1455                                 long_tmp = stack[--stack_ptr];
1456                                 altera_export_int(name, long_tmp);
1457                         }
1458                         break;
1459                 case OP_PSHE:
1460                         /*
1461                          * Push integer array element
1462                          * ...argument 0 is variable ID
1463                          * ...stack 0 is array index
1464                          */
1465                         if (!altera_check_stack(stack_ptr, 1, &status))
1466                                 break;
1467                         variable_id = args[0];
1468                         index = stack[stack_ptr - 1];
1469
1470                         /* check variable type */
1471                         if ((attrs[variable_id] & 0x1f) == 0x19) {
1472                                 /* writable integer array */
1473                                 longptr_tmp = (long *)vars[variable_id];
1474                                 stack[stack_ptr - 1] = longptr_tmp[index];
1475                         } else if ((attrs[variable_id] & 0x1f) == 0x1c) {
1476                                 /* read-only integer array */
1477                                 long_tmp = vars[variable_id] +
1478                                                 (index * sizeof(long));
1479                                 stack[stack_ptr - 1] =
1480                                         get_unaligned_be32(&p[long_tmp]);
1481                         } else
1482                                 status = -ERANGE;
1483
1484                         break;
1485                 case OP_PSHA:
1486                         /*
1487                          * Push Boolean array
1488                          * ...argument 0 is variable ID
1489                          * ...stack 0 is count
1490                          * ...stack 1 is array index
1491                          */
1492                         if (!altera_check_stack(stack_ptr, 2, &status))
1493                                 break;
1494                         variable_id = args[0];
1495
1496                         /* check that variable is a Boolean array */
1497                         if ((attrs[variable_id] & 0x18) != 0x08) {
1498                                 status = -ERANGE;
1499                                 break;
1500                         }
1501
1502                         charptr_tmp = (u8 *)vars[variable_id];
1503
1504                         /* pop the count (number of bits to copy) */
1505                         count = stack[--stack_ptr];
1506
1507                         /* pop the array index */
1508                         index = stack[stack_ptr - 1];
1509
1510                         if (version > 0)
1511                                 /*
1512                                  * stack 0 = array right index
1513                                  * stack 1 = array left index
1514                                  */
1515                                 count = 1 + count - index;
1516
1517                         if ((count < 1) || (count > 32)) {
1518                                 status = -ERANGE;
1519                                 break;
1520                         }
1521
1522                         long_tmp = 0L;
1523
1524                         for (i = 0; i < count; ++i)
1525                                 if (charptr_tmp[(i + index) >> 3] &
1526                                                 (1 << ((i + index) & 7)))
1527                                         long_tmp |= (1L << i);
1528
1529                         stack[stack_ptr - 1] = long_tmp;
1530
1531                         break;
1532                 case OP_DYNA:
1533                         /*
1534                          * Dynamically change size of array
1535                          * ...argument 0 is variable ID
1536                          * ...stack 0 is new size
1537                          */
1538                         if (!altera_check_stack(stack_ptr, 1, &status))
1539                                 break;
1540                         variable_id = args[0];
1541                         long_tmp = stack[--stack_ptr];
1542
1543                         if (long_tmp > var_size[variable_id]) {
1544                                 var_size[variable_id] = long_tmp;
1545
1546                                 if (attrs[variable_id] & 0x10)
1547                                         /* allocate integer array */
1548                                         long_tmp *= sizeof(long);
1549                                 else
1550                                         /* allocate Boolean array */
1551                                         long_tmp = (long_tmp + 7) >> 3;
1552
1553                                 /*
1554                                  * If the buffer was previously allocated,
1555                                  * free it
1556                                  */
1557                                 if (attrs[variable_id] & 0x80) {
1558                                         kfree((void *)vars[variable_id]);
1559                                         vars[variable_id] = 0;
1560                                 }
1561
1562                                 /*
1563                                  * Allocate a new buffer
1564                                  * of the requested size
1565                                  */
1566                                 vars[variable_id] = (long)
1567                                         kzalloc(long_tmp, GFP_KERNEL);
1568
1569                                 if (vars[variable_id] == 0) {
1570                                         status = -ENOMEM;
1571                                         break;
1572                                 }
1573
1574                                 /*
1575                                  * Set the attribute bit to indicate that
1576                                  * this buffer was dynamically allocated and
1577                                  * should be freed later
1578                                  */
1579                                 attrs[variable_id] |= 0x80;
1580
1581                                 /* zero out memory */
1582                                 count = ((var_size[variable_id] + 7L) /
1583                                                                         8L);
1584                                 charptr_tmp = (u8 *)(vars[variable_id]);
1585                                 for (index = 0; index < count; ++index)
1586                                         charptr_tmp[index] = 0;
1587
1588                         }
1589
1590                         break;
1591                 case OP_EXPV:
1592                         /*
1593                          * Export Boolean array
1594                          * ...argument 0 is string ID
1595                          * ...stack 0 is variable ID
1596                          * ...stack 1 is array right index
1597                          * ...stack 2 is array left index
1598                          */
1599                         if (!altera_check_stack(stack_ptr, 3, &status))
1600                                 break;
1601                         if (version == 0) {
1602                                 /* EXPV is not supported in JBC 1.0 */
1603                                 bad_opcode = 1;
1604                                 break;
1605                         }
1606                         name = &p[str_table + args[0]];
1607                         variable_id = stack[--stack_ptr];
1608                         long_idx = stack[--stack_ptr];/* right indx */
1609                         long_idx2 = stack[--stack_ptr];/* left indx */
1610
1611                         if (long_idx > long_idx2) {
1612                                 /* reverse indices not supported */
1613                                 status = -ERANGE;
1614                                 break;
1615                         }
1616
1617                         long_count = 1 + long_idx2 - long_idx;
1618
1619                         charptr_tmp = (u8 *)vars[variable_id];
1620                         charptr_tmp2 = NULL;
1621
1622                         if ((long_idx & 7L) != 0) {
1623                                 s32 k = long_idx;
1624                                 charptr_tmp2 =
1625                                         kzalloc(((long_count + 7L) / 8L),
1626                                                         GFP_KERNEL);
1627                                 if (charptr_tmp2 == NULL) {
1628                                         status = -ENOMEM;
1629                                         break;
1630                                 }
1631
1632                                 for (i = 0; i < long_count; ++i) {
1633                                         if (charptr_tmp[k >> 3] &
1634                                                         (1 << (k & 7)))
1635                                                 charptr_tmp2[i >> 3] |=
1636                                                                 (1 << (i & 7));
1637                                         else
1638                                                 charptr_tmp2[i >> 3] &=
1639                                                                 ~(1 << (i & 7));
1640
1641                                         ++k;
1642                                 }
1643                                 charptr_tmp = charptr_tmp2;
1644
1645                         } else if (long_idx != 0)
1646                                 charptr_tmp = &charptr_tmp[long_idx >> 3];
1647
1648                         altera_export_bool_array(name, charptr_tmp,
1649                                                         long_count);
1650
1651                         /* free allocated buffer */
1652                         if ((long_idx & 7L) != 0)
1653                                 kfree(charptr_tmp2);
1654
1655                         break;
1656                 case OP_COPY: {
1657                         /*
1658                          * Array copy
1659                          * ...argument 0 is dest ID
1660                          * ...argument 1 is source ID
1661                          * ...stack 0 is count
1662                          * ...stack 1 is dest index
1663                          * ...stack 2 is source index
1664                          */
1665                         s32 copy_count;
1666                         s32 copy_index;
1667                         s32 copy_index2;
1668                         s32 destleft;
1669                         s32 src_count;
1670                         s32 dest_count;
1671                         int src_reverse = 0;
1672                         int dest_reverse = 0;
1673
1674                         if (!altera_check_stack(stack_ptr, 3, &status))
1675                                 break;
1676
1677                         copy_count = stack[--stack_ptr];
1678                         copy_index = stack[--stack_ptr];
1679                         copy_index2 = stack[--stack_ptr];
1680                         reverse = 0;
1681
1682                         if (version > 0) {
1683                                 /*
1684                                  * stack 0 = source right index
1685                                  * stack 1 = source left index
1686                                  * stack 2 = destination right index
1687                                  * stack 3 = destination left index
1688                                  */
1689                                 destleft = stack[--stack_ptr];
1690
1691                                 if (copy_count > copy_index) {
1692                                         src_reverse = 1;
1693                                         reverse = 1;
1694                                         src_count = 1 + copy_count - copy_index;
1695                                         /* copy_index = source start index */
1696                                 } else {
1697                                         src_count = 1 + copy_index - copy_count;
1698                                         /* source start index */
1699                                         copy_index = copy_count;
1700                                 }
1701
1702                                 if (copy_index2 > destleft) {
1703                                         dest_reverse = 1;
1704                                         reverse = !reverse;
1705                                         dest_count = 1 + copy_index2 - destleft;
1706                                         /* destination start index */
1707                                         copy_index2 = destleft;
1708                                 } else
1709                                         dest_count = 1 + destleft - copy_index2;
1710
1711                                 copy_count = (src_count < dest_count) ?
1712                                                         src_count : dest_count;
1713
1714                                 if ((src_reverse || dest_reverse) &&
1715                                         (src_count != dest_count))
1716                                         /*
1717                                          * If either the source or destination
1718                                          * is reversed, we can't tolerate
1719                                          * a length mismatch, because we
1720                                          * "left justify" arrays when copying.
1721                                          * This won't work correctly
1722                                          * with reversed arrays.
1723                                          */
1724                                         status = -ERANGE;
1725
1726                         }
1727
1728                         count = copy_count;
1729                         index = copy_index;
1730                         index2 = copy_index2;
1731
1732                         /*
1733                          * If destination is a read-only array,
1734                          * allocate a buffer and convert it to a writable array
1735                          */
1736                         variable_id = args[1];
1737                         if ((version > 0) &&
1738                                 ((attrs[variable_id] & 0x9c) == 0x0c)) {
1739                                 /* Allocate a writable buffer for this array */
1740                                 long_tmp =
1741                                         (var_size[variable_id] + 7L) >> 3L;
1742                                 charptr_tmp2 = (u8 *)vars[variable_id];
1743                                 charptr_tmp =
1744                                         kzalloc(long_tmp, GFP_KERNEL);
1745                                 vars[variable_id] = (long)charptr_tmp;
1746
1747                                 if (vars[variable_id] == 0) {
1748                                         status = -ENOMEM;
1749                                         break;
1750                                 }
1751
1752                                 /* zero the buffer */
1753                                 for (long_idx = 0L; long_idx < long_tmp;
1754                                                                 ++long_idx)
1755                                         charptr_tmp[long_idx] = 0;
1756
1757                                 /* copy previous contents into buffer */
1758                                 for (long_idx = 0L;
1759                                         long_idx < var_size[variable_id];
1760                                                                 ++long_idx) {
1761                                         long_idx2 = long_idx;
1762
1763                                         if (charptr_tmp2[long_idx2 >> 3] &
1764                                                 (1 << (long_idx2 & 7)))
1765                                                 charptr_tmp[long_idx >> 3] |=
1766                                                         (1 << (long_idx & 7));
1767
1768                                 }
1769
1770                                 /*
1771                                 set bit 7 - buffer was dynamically allocated */
1772                                 attrs[variable_id] |= 0x80;
1773
1774                                 /* clear bit 2 - variable is writable */
1775                                 attrs[variable_id] &= ~0x04;
1776                                 attrs[variable_id] |= 0x01;
1777                         }
1778
1779                         charptr_tmp = (u8 *)vars[args[1]];
1780                         charptr_tmp2 = (u8 *)vars[args[0]];
1781
1782                         /* check if destination is a writable Boolean array */
1783                         if ((attrs[args[1]] & 0x1c) != 0x08) {
1784                                 status = -ERANGE;
1785                                 break;
1786                         }
1787
1788                         if (count < 1) {
1789                                 status = -ERANGE;
1790                                 break;
1791                         }
1792
1793                         if (reverse)
1794                                 index2 += (count - 1);
1795
1796                         for (i = 0; i < count; ++i) {
1797                                 if (charptr_tmp2[index >> 3] &
1798                                                         (1 << (index & 7)))
1799                                         charptr_tmp[index2 >> 3] |=
1800                                                         (1 << (index2 & 7));
1801                                 else
1802                                         charptr_tmp[index2 >> 3] &=
1803                                                 ~(1 << (index2 & 7));
1804
1805                                 ++index;
1806                                 if (reverse)
1807                                         --index2;
1808                                 else
1809                                         ++index2;
1810                         }
1811
1812                         break;
1813                 }
1814                 case OP_DSC:
1815                 case OP_ISC: {
1816                         /*
1817                          * DRSCAN with capture
1818                          * IRSCAN with capture
1819                          * ...argument 0 is scan data variable ID
1820                          * ...argument 1 is capture variable ID
1821                          * ...stack 0 is capture index
1822                          * ...stack 1 is scan data index
1823                          * ...stack 2 is count
1824                          */
1825                         s32 scan_right, scan_left;
1826                         s32 capture_count = 0;
1827                         s32 scan_count = 0;
1828                         s32 capture_index;
1829                         s32 scan_index;
1830
1831                         if (!altera_check_stack(stack_ptr, 3, &status))
1832                                 break;
1833
1834                         capture_index = stack[--stack_ptr];
1835                         scan_index = stack[--stack_ptr];
1836
1837                         if (version > 0) {
1838                                 /*
1839                                  * stack 0 = capture right index
1840                                  * stack 1 = capture left index
1841                                  * stack 2 = scan right index
1842                                  * stack 3 = scan left index
1843                                  * stack 4 = count
1844                                  */
1845                                 scan_right = stack[--stack_ptr];
1846                                 scan_left = stack[--stack_ptr];
1847                                 capture_count = 1 + scan_index - capture_index;
1848                                 scan_count = 1 + scan_left - scan_right;
1849                                 scan_index = scan_right;
1850                         }
1851
1852                         long_count = stack[--stack_ptr];
1853                         /*
1854                          * If capture array is read-only, allocate a buffer
1855                          * and convert it to a writable array
1856                          */
1857                         variable_id = args[1];
1858                         if ((version > 0) &&
1859                                 ((attrs[variable_id] & 0x9c) == 0x0c)) {
1860                                 /* Allocate a writable buffer for this array */
1861                                 long_tmp =
1862                                         (var_size[variable_id] + 7L) >> 3L;
1863                                 charptr_tmp2 = (u8 *)vars[variable_id];
1864                                 charptr_tmp =
1865                                         kzalloc(long_tmp, GFP_KERNEL);
1866                                 vars[variable_id] = (long)charptr_tmp;
1867
1868                                 if (vars[variable_id] == 0) {
1869                                         status = -ENOMEM;
1870                                         break;
1871                                 }
1872
1873                                 /* zero the buffer */
1874                                 for (long_idx = 0L; long_idx < long_tmp;
1875                                                                 ++long_idx)
1876                                         charptr_tmp[long_idx] = 0;
1877
1878                                 /* copy previous contents into buffer */
1879                                 for (long_idx = 0L;
1880                                         long_idx < var_size[variable_id];
1881                                                                 ++long_idx) {
1882                                         long_idx2 = long_idx;
1883
1884                                         if (charptr_tmp2[long_idx2 >> 3] &
1885                                                 (1 << (long_idx2 & 7)))
1886                                                 charptr_tmp[long_idx >> 3] |=
1887                                                         (1 << (long_idx & 7));
1888
1889                                 }
1890
1891                                 /*
1892                                  * set bit 7 - buffer was
1893                                  * dynamically allocated
1894                                  */
1895                                 attrs[variable_id] |= 0x80;
1896
1897                                 /* clear bit 2 - variable is writable */
1898                                 attrs[variable_id] &= ~0x04;
1899                                 attrs[variable_id] |= 0x01;
1900
1901                         }
1902
1903                         charptr_tmp = (u8 *)vars[args[0]];
1904                         charptr_tmp2 = (u8 *)vars[args[1]];
1905
1906                         if ((version > 0) &&
1907                                         ((long_count > capture_count) ||
1908                                         (long_count > scan_count))) {
1909                                 status = -ERANGE;
1910                                 break;
1911                         }
1912
1913                         /*
1914                          * check that capture array
1915                          * is a writable Boolean array
1916                          */
1917                         if ((attrs[args[1]] & 0x1c) != 0x08) {
1918                                 status = -ERANGE;
1919                                 break;
1920                         }
1921
1922                         if (status == 0) {
1923                                 if (opcode == 0x82) /* DSC */
1924                                         status = altera_swap_dr(astate,
1925                                                         long_count,
1926                                                         charptr_tmp,
1927                                                         scan_index,
1928                                                         charptr_tmp2,
1929                                                         capture_index);
1930                                 else /* ISC */
1931                                         status = altera_swap_ir(astate,
1932                                                         long_count,
1933                                                         charptr_tmp,
1934                                                         scan_index,
1935                                                         charptr_tmp2,
1936                                                         capture_index);
1937
1938                         }
1939
1940                         break;
1941                 }
1942                 case OP_WAIT:
1943                         /*
1944                          * WAIT
1945                          * ...argument 0 is wait state
1946                          * ...argument 1 is end state
1947                          * ...stack 0 is cycles
1948                          * ...stack 1 is microseconds
1949                          */
1950                         if (!altera_check_stack(stack_ptr, 2, &status))
1951                                 break;
1952                         long_tmp = stack[--stack_ptr];
1953
1954                         if (long_tmp != 0L)
1955                                 status = altera_wait_cycles(astate, long_tmp,
1956                                                                 args[0]);
1957
1958                         long_tmp = stack[--stack_ptr];
1959
1960                         if ((status == 0) && (long_tmp != 0L))
1961                                 status = altera_wait_msecs(astate,
1962                                                                 long_tmp,
1963                                                                 args[0]);
1964
1965                         if ((status == 0) && (args[1] != args[0]))
1966                                 status = altera_goto_jstate(astate,
1967                                                                 args[1]);
1968
1969                         if (version > 0) {
1970                                 --stack_ptr; /* throw away MAX cycles */
1971                                 --stack_ptr; /* throw away MAX microseconds */
1972                         }
1973                         break;
1974                 case OP_CMPA: {
1975                         /*
1976                          * Array compare
1977                          * ...argument 0 is source 1 ID
1978                          * ...argument 1 is source 2 ID
1979                          * ...argument 2 is mask ID
1980                          * ...stack 0 is source 1 index
1981                          * ...stack 1 is source 2 index
1982                          * ...stack 2 is mask index
1983                          * ...stack 3 is count
1984                          */
1985                         s32 a, b;
1986                         u8 *source1 = (u8 *)vars[args[0]];
1987                         u8 *source2 = (u8 *)vars[args[1]];
1988                         u8 *mask = (u8 *)vars[args[2]];
1989                         u32 index1;
1990                         u32 index2;
1991                         u32 mask_index;
1992
1993                         if (!altera_check_stack(stack_ptr, 4, &status))
1994                                 break;
1995
1996                         index1 = stack[--stack_ptr];
1997                         index2 = stack[--stack_ptr];
1998                         mask_index = stack[--stack_ptr];
1999                         long_count = stack[--stack_ptr];
2000
2001                         if (version > 0) {
2002                                 /*
2003                                  * stack 0 = source 1 right index
2004                                  * stack 1 = source 1 left index
2005                                  * stack 2 = source 2 right index
2006                                  * stack 3 = source 2 left index
2007                                  * stack 4 = mask right index
2008                                  * stack 5 = mask left index
2009                                  */
2010                                 s32 mask_right = stack[--stack_ptr];
2011                                 s32 mask_left = stack[--stack_ptr];
2012                                 /* source 1 count */
2013                                 a = 1 + index2 - index1;
2014                                 /* source 2 count */
2015                                 b = 1 + long_count - mask_index;
2016                                 a = (a < b) ? a : b;
2017                                 /* mask count */
2018                                 b = 1 + mask_left - mask_right;
2019                                 a = (a < b) ? a : b;
2020                                 /* source 2 start index */
2021                                 index2 = mask_index;
2022                                 /* mask start index */
2023                                 mask_index = mask_right;
2024                                 long_count = a;
2025                         }
2026
2027                         long_tmp = 1L;
2028
2029                         if (long_count < 1)
2030                                 status = -ERANGE;
2031                         else {
2032                                 count = long_count;
2033
2034                                 for (i = 0; i < count; ++i) {
2035                                         if (mask[mask_index >> 3] &
2036                                                 (1 << (mask_index & 7))) {
2037                                                 a = source1[index1 >> 3] &
2038                                                         (1 << (index1 & 7))
2039                                                                 ? 1 : 0;
2040                                                 b = source2[index2 >> 3] &
2041                                                         (1 << (index2 & 7))
2042                                                                 ? 1 : 0;
2043
2044                                                 if (a != b) /* failure */
2045                                                         long_tmp = 0L;
2046                                         }
2047                                         ++index1;
2048                                         ++index2;
2049                                         ++mask_index;
2050                                 }
2051                         }
2052
2053                         stack[stack_ptr++] = long_tmp;
2054
2055                         break;
2056                 }
2057                 default:
2058                         /* Unrecognized opcode -- ERROR! */
2059                         bad_opcode = 1;
2060                         break;
2061                 }
2062
2063                 if (bad_opcode)
2064                         status = -ENOSYS;
2065
2066                 if ((stack_ptr < 0) || (stack_ptr >= ALTERA_STACK_SIZE))
2067                         status = -EOVERFLOW;
2068
2069                 if (status != 0) {
2070                         done = 1;
2071                         *error_address = (s32)(opcode_address - code_sect);
2072                 }
2073         }
2074
2075         altera_free_buffers(astate);
2076
2077         /* Free all dynamically allocated arrays */
2078         if ((attrs != NULL) && (vars != NULL))
2079                 for (i = 0; i < sym_count; ++i)
2080                         if (attrs[i] & 0x80)
2081                                 kfree((void *)vars[i]);
2082
2083         kfree(vars);
2084         kfree(var_size);
2085         kfree(attrs);
2086         kfree(proc_attributes);
2087
2088         return status;
2089 }
2090
2091 static int altera_get_note(u8 *p, s32 program_size, s32 *offset,
2092                            char *key, char *value, int keylen, int vallen)
2093 /*
2094  * Gets key and value of NOTE fields in the JBC file.
2095  * Can be called in two modes:  if offset pointer is NULL,
2096  * then the function searches for note fields which match
2097  * the key string provided.  If offset is not NULL, then
2098  * the function finds the next note field of any key,
2099  * starting at the offset specified by the offset pointer.
2100  * Returns 0 for success, else appropriate error code
2101  */
2102 {
2103         int status = -ENODATA;
2104         u32 note_strings = 0L;
2105         u32 note_table = 0L;
2106         u32 note_count = 0L;
2107         u32 first_word = 0L;
2108         int version = 0;
2109         int delta = 0;
2110         char *key_ptr;
2111         char *value_ptr;
2112         int i;
2113
2114         /* Read header information */
2115         if (program_size > 52L) {
2116                 first_word    = get_unaligned_be32(&p[0]);
2117                 version = (first_word & 1L);
2118                 delta = version * 8;
2119
2120                 note_strings  = get_unaligned_be32(&p[8 + delta]);
2121                 note_table    = get_unaligned_be32(&p[12 + delta]);
2122                 note_count    = get_unaligned_be32(&p[44 + (2 * delta)]);
2123         }
2124
2125         if ((first_word != 0x4A414D00L) && (first_word != 0x4A414D01L))
2126                 return -EIO;
2127
2128         if (note_count <= 0L)
2129                 return status;
2130
2131         if (offset == NULL) {
2132                 /*
2133                  * We will search for the first note with a specific key,
2134                  * and return only the value
2135                  */
2136                 for (i = 0; (i < note_count) &&
2137                                                 (status != 0); ++i) {
2138                         key_ptr = &p[note_strings +
2139                                         get_unaligned_be32(
2140                                         &p[note_table + (8 * i)])];
2141                         if (key && !strncasecmp(key, key_ptr, strlen(key_ptr))) {
2142                                 status = 0;
2143
2144                                 value_ptr = &p[note_strings +
2145                                                 get_unaligned_be32(
2146                                                 &p[note_table + (8 * i) + 4])];
2147
2148                                 if (value != NULL)
2149                                         strlcpy(value, value_ptr, vallen);
2150
2151                         }
2152                 }
2153         } else {
2154                 /*
2155                  * We will search for the next note, regardless of the key,
2156                  * and return both the value and the key
2157                  */
2158
2159                 i = *offset;
2160
2161                 if ((i >= 0) && (i < note_count)) {
2162                         status = 0;
2163
2164                         if (key != NULL)
2165                                 strlcpy(key, &p[note_strings +
2166                                                 get_unaligned_be32(
2167                                                 &p[note_table + (8 * i)])],
2168                                         keylen);
2169
2170                         if (value != NULL)
2171                                 strlcpy(value, &p[note_strings +
2172                                                 get_unaligned_be32(
2173                                                 &p[note_table + (8 * i) + 4])],
2174                                         vallen);
2175
2176                         *offset = i + 1;
2177                 }
2178         }
2179
2180         return status;
2181 }
2182
2183 static int altera_check_crc(u8 *p, s32 program_size)
2184 {
2185         int status = 0;
2186         u16 local_expected = 0,
2187             local_actual = 0,
2188             shift_reg = 0xffff;
2189         int bit, feedback;
2190         u8 databyte;
2191         u32 i;
2192         u32 crc_section = 0L;
2193         u32 first_word = 0L;
2194         int version = 0;
2195         int delta = 0;
2196
2197         if (program_size > 52L) {
2198                 first_word  = get_unaligned_be32(&p[0]);
2199                 version = (first_word & 1L);
2200                 delta = version * 8;
2201
2202                 crc_section = get_unaligned_be32(&p[32 + delta]);
2203         }
2204
2205         if ((first_word != 0x4A414D00L) && (first_word != 0x4A414D01L))
2206                 status = -EIO;
2207
2208         if (crc_section >= program_size)
2209                 status = -EIO;
2210
2211         if (status == 0) {
2212                 local_expected = (u16)get_unaligned_be16(&p[crc_section]);
2213
2214                 for (i = 0; i < crc_section; ++i) {
2215                         databyte = p[i];
2216                         for (bit = 0; bit < 8; bit++) {
2217                                 feedback = (databyte ^ shift_reg) & 0x01;
2218                                 shift_reg >>= 1;
2219                                 if (feedback)
2220                                         shift_reg ^= 0x8408;
2221
2222                                 databyte >>= 1;
2223                         }
2224                 }
2225
2226                 local_actual = (u16)~shift_reg;
2227
2228                 if (local_expected != local_actual)
2229                         status = -EILSEQ;
2230
2231         }
2232
2233         if (debug || status) {
2234                 switch (status) {
2235                 case 0:
2236                         printk(KERN_INFO "%s: CRC matched: %04x\n", __func__,
2237                                 local_actual);
2238                         break;
2239                 case -EILSEQ:
2240                         printk(KERN_ERR "%s: CRC mismatch: expected %04x, "
2241                                 "actual %04x\n", __func__, local_expected,
2242                                 local_actual);
2243                         break;
2244                 case -EIO:
2245                         printk(KERN_ERR "%s: error: format isn't "
2246                                 "recognized.\n", __func__);
2247                         break;
2248                 default:
2249                         printk(KERN_ERR "%s: CRC function returned error "
2250                                 "code %d\n", __func__, status);
2251                         break;
2252                 }
2253         }
2254
2255         return status;
2256 }
2257
2258 static int altera_get_file_info(u8 *p,
2259                                         s32 program_size,
2260                                         int *format_version,
2261                                         int *action_count,
2262                                         int *procedure_count)
2263 {
2264         int status = -EIO;
2265         u32 first_word = 0;
2266         int version = 0;
2267
2268         if (program_size <= 52L)
2269                 return status;
2270
2271         first_word = get_unaligned_be32(&p[0]);
2272
2273         if ((first_word == 0x4A414D00L) || (first_word == 0x4A414D01L)) {
2274                 status = 0;
2275
2276                 version = (first_word & 1L);
2277                 *format_version = version + 1;
2278
2279                 if (version > 0) {
2280                         *action_count = get_unaligned_be32(&p[48]);
2281                         *procedure_count = get_unaligned_be32(&p[52]);
2282                 }
2283         }
2284
2285         return status;
2286 }
2287
2288 static int altera_get_act_info(u8 *p,
2289                                         s32 program_size,
2290                                         int index,
2291                                         char **name,
2292                                         char **description,
2293                                         struct altera_procinfo **proc_list)
2294 {
2295         int status = -EIO;
2296         struct altera_procinfo *procptr = NULL;
2297         struct altera_procinfo *tmpptr = NULL;
2298         u32 first_word = 0L;
2299         u32 action_table = 0L;
2300         u32 proc_table = 0L;
2301         u32 str_table = 0L;
2302         u32 note_strings = 0L;
2303         u32 action_count = 0L;
2304         u32 proc_count = 0L;
2305         u32 act_name_id = 0L;
2306         u32 act_desc_id = 0L;
2307         u32 act_proc_id = 0L;
2308         u32 act_proc_name = 0L;
2309         u8 act_proc_attribute = 0;
2310
2311         if (program_size <= 52L)
2312                 return status;
2313         /* Read header information */
2314         first_word = get_unaligned_be32(&p[0]);
2315
2316         if (first_word != 0x4A414D01L)
2317                 return status;
2318
2319         action_table = get_unaligned_be32(&p[4]);
2320         proc_table   = get_unaligned_be32(&p[8]);
2321         str_table = get_unaligned_be32(&p[12]);
2322         note_strings = get_unaligned_be32(&p[16]);
2323         action_count = get_unaligned_be32(&p[48]);
2324         proc_count   = get_unaligned_be32(&p[52]);
2325
2326         if (index >= action_count)
2327                 return status;
2328
2329         act_name_id = get_unaligned_be32(&p[action_table + (12 * index)]);
2330         act_desc_id = get_unaligned_be32(&p[action_table + (12 * index) + 4]);
2331         act_proc_id = get_unaligned_be32(&p[action_table + (12 * index) + 8]);
2332
2333         *name = &p[str_table + act_name_id];
2334
2335         if (act_desc_id < (note_strings - str_table))
2336                 *description = &p[str_table + act_desc_id];
2337
2338         do {
2339                 act_proc_name = get_unaligned_be32(
2340                                         &p[proc_table + (13 * act_proc_id)]);
2341                 act_proc_attribute =
2342                         (p[proc_table + (13 * act_proc_id) + 8] & 0x03);
2343
2344                 procptr =
2345                                 kzalloc(sizeof(struct altera_procinfo),
2346                                                                 GFP_KERNEL);
2347
2348                 if (procptr == NULL)
2349                         status = -ENOMEM;
2350                 else {
2351                         procptr->name = &p[str_table + act_proc_name];
2352                         procptr->attrs = act_proc_attribute;
2353                         procptr->next = NULL;
2354
2355                         /* add record to end of linked list */
2356                         if (*proc_list == NULL)
2357                                 *proc_list = procptr;
2358                         else {
2359                                 tmpptr = *proc_list;
2360                                 while (tmpptr->next != NULL)
2361                                         tmpptr = tmpptr->next;
2362                                 tmpptr->next = procptr;
2363                         }
2364                 }
2365
2366                 act_proc_id = get_unaligned_be32(
2367                                 &p[proc_table + (13 * act_proc_id) + 4]);
2368         } while ((act_proc_id != 0) && (act_proc_id < proc_count));
2369
2370         return status;
2371 }
2372
2373 int altera_init(struct altera_config *config, const struct firmware *fw)
2374 {
2375         struct altera_state *astate = NULL;
2376         struct altera_procinfo *proc_list = NULL;
2377         struct altera_procinfo *procptr = NULL;
2378         char *key = NULL;
2379         char *value = NULL;
2380         char *action_name = NULL;
2381         char *description = NULL;
2382         int exec_result = 0;
2383         int exit_code = 0;
2384         int format_version = 0;
2385         int action_count = 0;
2386         int procedure_count = 0;
2387         int index = 0;
2388         s32 offset = 0L;
2389         s32 error_address = 0L;
2390         int retval = 0;
2391
2392         key = kzalloc(33, GFP_KERNEL);
2393         if (!key) {
2394                 retval = -ENOMEM;
2395                 goto out;
2396         }
2397         value = kzalloc(257, GFP_KERNEL);
2398         if (!value) {
2399                 retval = -ENOMEM;
2400                 goto free_key;
2401         }
2402         astate = kzalloc(sizeof(struct altera_state), GFP_KERNEL);
2403         if (!astate) {
2404                 retval = -ENOMEM;
2405                 goto free_value;
2406         }
2407
2408         astate->config = config;
2409         if (!astate->config->jtag_io) {
2410                 dprintk("%s: using byteblaster!\n", __func__);
2411                 astate->config->jtag_io = netup_jtag_io_lpt;
2412         }
2413
2414         altera_check_crc((u8 *)fw->data, fw->size);
2415
2416         if (debug) {
2417                 altera_get_file_info((u8 *)fw->data, fw->size, &format_version,
2418                                         &action_count, &procedure_count);
2419                 printk(KERN_INFO "%s: File format is %s ByteCode format\n",
2420                         __func__, (format_version == 2) ? "Jam STAPL" :
2421                                                 "pre-standardized Jam 1.1");
2422                 while (altera_get_note((u8 *)fw->data, fw->size,
2423                                         &offset, key, value, 32, 256) == 0)
2424                         printk(KERN_INFO "%s: NOTE \"%s\" = \"%s\"\n",
2425                                         __func__, key, value);
2426         }
2427
2428         if (debug && (format_version == 2) && (action_count > 0)) {
2429                 printk(KERN_INFO "%s: Actions available:\n", __func__);
2430                 for (index = 0; index < action_count; ++index) {
2431                         altera_get_act_info((u8 *)fw->data, fw->size,
2432                                                 index, &action_name,
2433                                                 &description,
2434                                                 &proc_list);
2435
2436                         if (description == NULL)
2437                                 printk(KERN_INFO "%s: %s\n",
2438                                                 __func__,
2439                                                 action_name);
2440                         else
2441                                 printk(KERN_INFO "%s: %s \"%s\"\n",
2442                                                 __func__,
2443                                                 action_name,
2444                                                 description);
2445
2446                         procptr = proc_list;
2447                         while (procptr != NULL) {
2448                                 if (procptr->attrs != 0)
2449                                         printk(KERN_INFO "%s:    %s (%s)\n",
2450                                                 __func__,
2451                                                 procptr->name,
2452                                                 (procptr->attrs == 1) ?
2453                                                 "optional" : "recommended");
2454
2455                                 proc_list = procptr->next;
2456                                 kfree(procptr);
2457                                 procptr = proc_list;
2458                         }
2459                 }
2460
2461                 printk(KERN_INFO "\n");
2462         }
2463
2464         exec_result = altera_execute(astate, (u8 *)fw->data, fw->size,
2465                                 &error_address, &exit_code, &format_version);
2466
2467         if (exit_code)
2468                 exec_result = -EREMOTEIO;
2469
2470         if ((format_version == 2) && (exec_result == -EINVAL)) {
2471                 if (astate->config->action == NULL)
2472                         printk(KERN_ERR "%s: error: no action specified for "
2473                                 "Jam STAPL file.\nprogram terminated.\n",
2474                                 __func__);
2475                 else
2476                         printk(KERN_ERR "%s: error: action \"%s\""
2477                                 " is not supported "
2478                                 "for this Jam STAPL file.\n"
2479                                 "Program terminated.\n", __func__,
2480                                 astate->config->action);
2481
2482         } else if (exec_result)
2483                 printk(KERN_ERR "%s: error %d\n", __func__, exec_result);
2484
2485         kfree(astate);
2486 free_value:
2487         kfree(value);
2488 free_key:
2489         kfree(key);
2490 out:
2491         return retval;
2492 }
2493 EXPORT_SYMBOL(altera_init);