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   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Spencer Oliver                                  *
   3  *   spen@spen-soft.co.uk                                                  *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by David T.L. Wong                                 *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  21  ***************************************************************************/
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "log.h"
  27 #include "mips32.h"
  28 #include "mips32_pracc.h"
  29
  30 typedef struct {
  31         u32 *local_iparam;
  32         int num_iparam;
  33         u32 *local_oparam;
  34         int num_oparam;
  35         u32 *code;
  36         int code_len;
  37         u32 stack[32];
  38         int stack_offset;
  39         mips_ejtag_t *ejtag_info;
  40 } mips32_pracc_context;
  41
  42 static int wait_for_pracc_rw(mips_ejtag_t *ejtag_info, u32 *ctrl)
  43 {
  44         u32 ejtag_ctrl;
  45
  46         while (1)
  47         {
  48                 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL);
  49                 ejtag_ctrl = EJTAG_CTRL_ROCC | EJTAG_CTRL_PRACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_SETDEV;
  50                 mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
  51                 if (ejtag_ctrl & EJTAG_CTRL_PRACC)
  52                         break;
  53                 LOG_DEBUG("DEBUGMODULE: No memory access in progress!\n");
  54                 return ERROR_JTAG_DEVICE_ERROR;
  55         }
  56
  57         *ctrl = ejtag_ctrl;
  58         return ERROR_OK;
  59 }
  60
  61 static int mips32_pracc_exec_read(mips32_pracc_context *ctx, u32 address)
  62 {
  63         int offset;
  64         u32 ctrl, data;
  65
  66         if ((address >= MIPS32_PRACC_PARAM_IN)
  67                 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
  68         {
  69                 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
  70                 data = ctx->local_iparam[offset];
  71         }
  72         else if ((address >= MIPS32_PRACC_PARAM_OUT)
  73                 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
  74         {
  75                 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
  76                 data = ctx->local_oparam[offset];
  77         }
  78         else if ((address >= MIPS32_PRACC_TEXT)
  79                 && (address <= MIPS32_PRACC_TEXT + ctx->code_len*4))
  80         {
  81                 offset = (address - MIPS32_PRACC_TEXT) / 4;
  82                 data = ctx->code[offset];
  83         }
  84         else if (address == MIPS32_PRACC_STACK)
  85         {
  86                 /* save to our debug stack */
  87                 data = ctx->stack[--ctx->stack_offset];
  88         }
  89         else
  90         {
  91                 /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back
  92                  * to start of debug vector */
  93
  94                 data = 0;
  95                 LOG_ERROR("Error reading unexpected address");
  96                 return ERROR_JTAG_DEVICE_ERROR;
  97         }
  98
  99         /* Send the data out */
 100         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
 101         mips_ejtag_drscan_32(ctx->ejtag_info, &data);
 102
 103         /* Clear the access pending bit (let the processor eat!) */
 104         ctrl = EJTAG_CTRL_ROCC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_SETDEV;
 105         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL);
 106         mips_ejtag_drscan_32(ctx->ejtag_info, &ctrl);
 107
 108         return ERROR_OK;
 109 }
 110
 111 static int mips32_pracc_exec_write(mips32_pracc_context *ctx, u32 address)
 112 {
 113         u32 ctrl,data;
 114         int offset;
 115
 116         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
 117         mips_ejtag_drscan_32(ctx->ejtag_info, &data);
 118
 119         /* Clear access pending bit */
 120         ctrl = EJTAG_CTRL_ROCC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_SETDEV;
 121         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL);
 122         mips_ejtag_drscan_32(ctx->ejtag_info, &ctrl);
 123
 124         if ((address >= MIPS32_PRACC_PARAM_IN)
 125                 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
 126         {
 127                 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
 128                 ctx->local_iparam[offset] = data;
 129         }
 130         else if ((address >= MIPS32_PRACC_PARAM_OUT )
 131                 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
 132         {
 133                 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
 134                 ctx->local_oparam[offset] = data;
 135         }
 136         else if (address == MIPS32_PRACC_STACK)
 137         {
 138                 /* save data onto our stack */
 139                 ctx->stack[ctx->stack_offset++] = data;
 140         }
 141         else
 142         {
 143                 LOG_ERROR("Error writing unexpected address");
 144                 return ERROR_JTAG_DEVICE_ERROR;
 145         }
 146
 147         return ERROR_OK;
 148 }
 149
 150 int mips32_pracc_exec( mips_ejtag_t *ejtag_info, int code_len, u32 *code, int num_param_in, u32 *param_in, int num_param_out, u32 *param_out, int cycle)
 151 {
 152         u32 ctrl;
 153         u32 address, data;
 154         mips32_pracc_context ctx;
 155         int retval;
 156         int pass = 0;
 157
 158         ctx.local_iparam = param_in;
 159         ctx.local_oparam = param_out;
 160         ctx.num_iparam = num_param_in;
 161         ctx.num_oparam = num_param_out;
 162         ctx.code = code;
 163         ctx.code_len = code_len;
 164         ctx.ejtag_info = ejtag_info;
 165         ctx.stack_offset = 0;
 166
 167         while (1)
 168         {
 169                 if ((retval = wait_for_pracc_rw(ejtag_info, &ctrl)) != ERROR_OK)
 170                         return retval;
 171
 172                 address = data = 0;
 173                 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL);
 174                 mips_ejtag_drscan_32(ejtag_info, &address);
 175
 176                 /* Check for read or write */
 177                 if (ctrl & EJTAG_CTRL_PRNW)
 178                 {
 179                         if ((retval = mips32_pracc_exec_write(&ctx, address)) != ERROR_OK)
 180                                 return retval;
 181                 }
 182                 else
 183                 {
 184                         /* Check to see if its reading at the debug vector. The first pass through
 185                          * the module is always read at the vector, so the first one we allow.  When
 186                          * the second read from the vector occurs we are done and just exit. */
 187                         if ((address == MIPS32_PRACC_TEXT) && (pass++))
 188                         {
 189                                 break;
 190                         }
 191
 192                         if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK)
 193                                 return retval;
 194                 }
 195
 196                 if (cycle == 0)
 197                         break;
 198         }
 199
 200         /* stack sanity check */
 201         if (ctx.stack_offset != 0)
 202         {
 203                 LOG_DEBUG("Pracc Stack not zero");
 204         }
 205
 206         return ERROR_OK;
 207 }
 208
 209 int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf)
 210 {
 211         switch (size)
 212         {
 213                 case 1:
 214                         return mips32_pracc_read_mem8(ejtag_info, addr, count, (u8*)buf);
 215                 case 2:
 216                         return mips32_pracc_read_mem16(ejtag_info, addr, count, (u16*)buf);
 217                 case 4:
 218                         return mips32_pracc_read_mem32(ejtag_info, addr, count, (u32*)buf);
 219         }
 220
 221         return ERROR_OK;
 222 }
 223
 224 int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf)
 225 {
 226         u32 code[] = {
 227                                                                                                                         /* start: */
 228                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 229                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 230                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 231                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 232                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 233                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 234                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 235
 236                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 237                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 238                 MIPS32_LW(9,0,8),                                                                       /* $9=mem[$8]; read addr */
 239                 MIPS32_LW(10,4,8),                                                                      /* $10=mem[$8+4]; read count */
 240                 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)),         /* $11=MIPS32_PRACC_PARAM_OUT */
 241                 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 242                 MIPS32_NOP,
 243                                                                                                                         /* loop: */
 244                 MIPS32_BEQ(0,10,9),                                                                     /* beq 0, $10, end */
 245                 MIPS32_NOP,
 246
 247                 MIPS32_LW(12,0,9),                                                                      /* lw $12,0($9), Load $12 with the word @mem[$9] */
 248                 MIPS32_SW(12,0,11),                                                             /* sw $12,0($11) */
 249
 250                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 251                 MIPS32_ADDI(9,9,4),                                                             /* $1+=4 */
 252                 MIPS32_ADDI(11,11,4),                                                           /* $11+=4 */
 253
 254                 MIPS32_NOP,
 255                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 256                 MIPS32_NOP,
 257                                                                                                                         /* end: */
 258                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 259                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 260                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 261                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 262                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 263                 MIPS32_NOP,
 264                 MIPS32_B(NEG16(31)),                                                            /* b start */
 265                 MIPS32_NOP,
 266         };
 267
 268         int retval;
 269         int blocksize;
 270         int bytesread;
 271         u32 param_in[2];
 272
 273         bytesread = 0;
 274
 275         while (count > 0)
 276         {
 277                 blocksize = count;
 278                 if (count > 0x400)
 279                         blocksize = 0x400;
 280
 281                 param_in[0] = addr;
 282                 param_in[1] = blocksize;
 283
 284                 if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 285                         sizeof(param_in)/sizeof(param_in[0]), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK)
 286                         return retval;
 287
 288                 count -= blocksize;
 289                 addr += blocksize;
 290                 bytesread += blocksize;
 291         }
 292
 293         return retval;
 294 }
 295
 296 int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info, u32 addr, int count, u16 *buf)
 297 {
 298         u32 code[] = {
 299                                                                                                                         /* start: */
 300                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 301                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 302                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 303                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 304                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 305                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 306                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 307
 308                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 309                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 310                 MIPS32_LW(9,0,8),                                                                       /* $9=mem[$8]; read addr */
 311                 MIPS32_LW(10,4,8),                                                                      /* $10=mem[$8+4]; read count */
 312                 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)),         /* $11=MIPS32_PRACC_PARAM_OUT */
 313                 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 314                 MIPS32_NOP,
 315                                                                                                                         /* loop: */
 316                 MIPS32_BEQ(0,10,9),                                                             /* beq 0, $10, end */
 317                 MIPS32_NOP,
 318
 319                 MIPS32_LHU(12,0,9),                                                             /* lw $12,0($9), Load $12 with the halfword @mem[$9] */
 320                 MIPS32_SW(12,0,11),                                                             /* sw $12,0($11) */
 321
 322                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 323                 MIPS32_ADDI(9,9,2),                                                             /* $9+=2 */
 324                 MIPS32_ADDI(11,11,4),                                                           /* $11+=4 */
 325                 MIPS32_NOP,
 326                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 327                 MIPS32_NOP,
 328
 329                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 330                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 331                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 332                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 333                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 334                 MIPS32_NOP,
 335                 MIPS32_B(NEG16(31)),                                                            /* b start */
 336                 MIPS32_NOP,
 337         };
 338
 339 //      /* TODO remove array */
 340         u32 param_out[count];
 341         int i;
 342
 343 //      int retval;
 344         int blocksize;
 345         int bytesread;
 346         u32 param_in[2];
 347
 348         bytesread = 0;
 349
 350         //while (count > 0)
 351         {
 352                 blocksize = count;
 353                 if (count > 0x400)
 354                         blocksize = 0x400;
 355
 356                 param_in[0] = addr;
 357                 param_in[1] = blocksize;
 358
 359                 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 360                         sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
 361
 362 //              count -= blocksize;
 363 //              addr += blocksize;
 364 //              bytesread += blocksize;
 365         }
 366
 367         for (i = 0; i < count; i++)
 368         {
 369                 buf[i] = param_out[i];
 370         }
 371
 372         return ERROR_OK;
 373 }
 374
 375 int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info, u32 addr, int count, u8 *buf)
 376 {
 377         u32 code[] = {
 378                                                                                                                         /* start: */
 379                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 380                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 381                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 382                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 383                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 384                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 385                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 386
 387                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 388                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 389                 MIPS32_LW(9,0,8),                                                                       /* $9=mem[$8]; read addr */
 390                 MIPS32_LW(10,4,8),                                                                      /* $10=mem[$8+4]; read count */
 391                 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)),         /* $11=MIPS32_PRACC_PARAM_OUT */
 392                 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 393                 MIPS32_NOP,
 394                                                                                                                         /* loop: */
 395                 MIPS32_BEQ(0,10,9),                                                             /* beq 0, $10, end */
 396                 MIPS32_NOP,
 397
 398                 MIPS32_LBU(12,0,9),                                                             /* lw $12,0($9), Load t4 with the byte @mem[t1] */
 399                 MIPS32_SW(12,0,11),                                                             /* sw $12,0($11) */
 400
 401                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 402                 MIPS32_ADDI(9,9,1),                                                             /* $9+=1 */
 403                 MIPS32_ADDI(11,11,4),                                                           /* $11+=4 */
 404                 MIPS32_NOP,
 405                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 406                 MIPS32_NOP,
 407                                                                                                                         /* end: */
 408                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 409                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 410                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 411                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 412                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 413                 MIPS32_NOP,
 414                 MIPS32_B(NEG16(31)),                                                            /* b start */
 415                 MIPS32_NOP,
 416         };
 417
 418 //      /* TODO remove array */
 419         u32 param_out[count];
 420         int i;
 421
 422 //      int retval;
 423         int blocksize;
 424         int bytesread;
 425         u32 param_in[2];
 426
 427         bytesread = 0;
 428
 429 //      while (count > 0)
 430         {
 431                 blocksize = count;
 432                 if (count > 0x400)
 433                         blocksize = 0x400;
 434
 435                 param_in[0] = addr;
 436                 param_in[1] = blocksize;
 437
 438                 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 439                         sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
 440
 441 //              count -= blocksize;
 442 //              addr += blocksize;
 443 //              bytesread += blocksize;
 444         }
 445
 446         for (i = 0; i < count; i++)
 447         {
 448                 buf[i] = param_out[i];
 449         }
 450
 451         return ERROR_OK;
 452 }
 453
 454 int mips32_pracc_write_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf)
 455 {
 456         switch (size)
 457         {
 458                 case 1:
 459                         return mips32_pracc_write_mem8(ejtag_info, addr, count, (u8*)buf);
 460                 case 2:
 461                         return mips32_pracc_write_mem16(ejtag_info, addr, count,(u16*)buf);
 462                 case 4:
 463                         return mips32_pracc_write_mem32(ejtag_info, addr, count, (u32*)buf);
 464         }
 465
 466         return ERROR_OK;
 467 }
 468
 469 int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf)
 470 {
 471         u32 code[] = {
 472                                                                                                                         /* start: */
 473                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 474                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 475                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 476                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 477                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 478                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 479                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 480
 481                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 482                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 483                 MIPS32_LW(9,0,8),                                                                       /* Load write addr to $9 */
 484                 MIPS32_LW(10,4,8),                                                                      /* Load write count to $10 */
 485                 MIPS32_ADDI(8,8,8),                                                             /* $8+=8 */
 486                 MIPS32_NOP,
 487                                                                                                                         /* loop: */
 488                 MIPS32_BEQ(0,10,9),                                                                     /* beq $0, $10, end */
 489                 MIPS32_NOP,
 490
 491                 MIPS32_LW(11,0,8),                                                                      /* lw $11,0($8), Load $11 with the word @mem[$8] */
 492                 MIPS32_SW(11,0,9),                                                                      /* sw $11,0($9) */
 493
 494                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 495                 MIPS32_ADDI(9,9,4),                                                             /* $9+=4 */
 496                 MIPS32_ADDI(8,8,4),                                                             /* $8+=4 */
 497                 MIPS32_NOP,
 498                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 499                 MIPS32_NOP,
 500                                                                                                                         /* end: */
 501                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 502                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 503                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 504                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 505                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 506                 MIPS32_NOP,
 507                 MIPS32_B(NEG16(30)),                                                            /* b start */
 508                 MIPS32_NOP,
 509         };
 510
 511         /* TODO remove array */
 512         u32 param_in[count+2];
 513         param_in[0] = addr;
 514         param_in[1] = count;
 515
 516         memcpy(&param_in[2], buf, count * sizeof(u32));
 517
 518         mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 519                 sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1);
 520
 521         return ERROR_OK;
 522 }
 523
 524 int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info, u32 addr, int count, u16 *buf)
 525 {
 526         u32 code[] = {
 527                                                                                                                         /* start: */
 528                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 529                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 530                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 531                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 532                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 533                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 534                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 535
 536                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 537                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 538                 MIPS32_LW(9,0,8),                                                                       /* Load write addr to $9 */
 539                 MIPS32_LW(10,4,8),                                                                      /* Load write count to $10 */
 540                 MIPS32_ADDI(8,8,8),                                                             /* $8+=8 */
 541                 MIPS32_NOP,
 542                                                                                                                         /* loop: */
 543                 MIPS32_BEQ(0,10,9),                                                                     /* beq $0, $10, end */
 544                 MIPS32_NOP,
 545
 546                 MIPS32_LW(11,0,8),                                                                      /* lw $11,0($8), Load $11 with the word @mem[$8] */
 547                 MIPS32_SH(11,0,9),                                                                      /* sh $11,0($9) */
 548
 549                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 550                 MIPS32_ADDI(9,9,2),                                                             /* $9+=2 */
 551                 MIPS32_ADDI(8,8,4),                                                             /* $8+=4 */
 552
 553                 MIPS32_NOP,
 554                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 555                 MIPS32_NOP,
 556                                                                                                                         /* end: */
 557                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 558                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 559                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 560                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 561                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 562                 MIPS32_NOP,
 563                 MIPS32_B(NEG16(30)),                                                            /* b start */
 564                 MIPS32_NOP,
 565         };
 566
 567         /* TODO remove array */
 568         u32 param_in[count+2];
 569         int i;
 570         param_in[0] = addr;
 571         param_in[1] = count;
 572
 573         for (i = 0; i < count; i++)
 574         {
 575                 param_in[i+2] = buf[i];
 576         }
 577
 578         mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 579                 sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
 580
 581         return ERROR_OK;
 582 }
 583
 584 int mips32_pracc_write_mem8(mips_ejtag_t *ejtag_info, u32 addr, int count, u8 *buf)
 585 {
 586         u32 code[] = {
 587                                                                                                                         /* start: */
 588                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 589                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 590                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 591                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 592                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 593                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 594                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 595
 596                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 597                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 598                 MIPS32_LW(9,0,8),                                                                       /* Load write addr to $9 */
 599                 MIPS32_LW(10,4,8),                                                                      /* Load write count to $10 */
 600                 MIPS32_ADDI(8,8,8),                                                             /* $8+=8 */
 601                 MIPS32_NOP,
 602                                                                                                                         /* loop: */
 603                 MIPS32_BEQ(0,10,9),                                                                     /* beq $0, $10, end */
 604                 MIPS32_NOP,
 605
 606                 MIPS32_LW(11,0,8),                                                                      /* lw $11,0($8), Load $11 with the word @mem[$8] */
 607                 MIPS32_SB(11,0,9),                                                                      /* sb $11,0($9) */
 608
 609                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 610                 MIPS32_ADDI(9,9,1),                                                             /* $9+=1 */
 611                 MIPS32_ADDI(8,8,4),                                                             /* $8+=4 */
 612
 613                 MIPS32_NOP,
 614                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 615                 MIPS32_NOP,
 616                                                                                                                         /* end: */
 617                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 618                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 619                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 620                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 621                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 622                 MIPS32_NOP,
 623                 MIPS32_B(NEG16(30)),                                                            /* b start */
 624                 MIPS32_NOP,
 625         };
 626
 627         /* TODO remove array */
 628         u32 param_in[count+2];
 629         int retval;
 630         int i;
 631         param_in[0] = addr;
 632         param_in[1] = count;
 633
 634         for (i = 0; i < count; i++)
 635         {
 636                 param_in[i+2] = buf[i];
 637         }
 638
 639         retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 640                 sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
 641
 642         return retval;
 643 }
 644
 645 int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, u32 *regs)
 646 {
 647         /* TODO restore all core registers */
 648
 649         u32 code[] = {
 650                                                                                                                 /* start: */
 651                 MIPS32_MTC0(2,31,0),                                                    /* move $2 to COP0 DeSave */
 652                 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)),   /* $2 = MIPS32_PRACC_PARAM_IN */
 653                 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_IN)),
 654                 /*MIPS32_LW(0,0*4,2),*/                                                 /* lw $0,0*4($2) */
 655                 MIPS32_LW(1,1*4,2),                                                     /* lw $1,1*4($2) */
 656                 MIPS32_MFC0(2,31,0),                                                    /* move COP0 DeSave to $2 */
 657
 658                 MIPS32_MTC0(1,31,0),                                                    /* move $1 to COP0 DeSave */
 659                 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_IN)),   /* $1 = MIPS32_PRACC_PARAM_IN */
 660                 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_IN)),
 661                 MIPS32_LW(2,2*4,1),                                                     /* lw $2,2*4($1) */
 662                 MIPS32_LW(3,3*4,1),                                                     /* lw $3,3*4($1) */
 663                 MIPS32_LW(4,4*4,1),                                                     /* lw $4,4*4($1) */
 664                 MIPS32_LW(5,5*4,1),                                                     /* lw $5,5*4($1) */
 665                 MIPS32_LW(6,6*4,1),                                                     /* lw $6,6*4($1) */
 666                 MIPS32_LW(7,7*4,1),                                                     /* lw $7,7*4($1) */
 667                 MIPS32_LW(8,8*4,1),                                                     /* lw $8,8*4($1) */
 668                 MIPS32_LW(9,9*4,1),                                                     /* lw $9,9*4($1) */
 669                 MIPS32_LW(10,10*4,1),                                                   /* lw $10,10*4($1) */
 670                 MIPS32_LW(11,11*4,1),                                                   /* lw $11,11*4($1) */
 671                 MIPS32_LW(12,12*4,1),                                                   /* lw $12,12*4($1) */
 672                 MIPS32_LW(13,13*4,1),                                                   /* lw $13,13*4($1) */
 673                 MIPS32_LW(14,14*4,1),                                                   /* lw $14,14*4($1) */
 674                 MIPS32_LW(15,15*4,1),                                                   /* lw $15,15*4($1) */
 675                 MIPS32_LW(16,16*4,1),                                                   /* lw $16,16*4($1) */
 676                 MIPS32_LW(17,17*4,1),                                                   /* lw $17,17*4($1) */
 677                 MIPS32_LW(18,18*4,1),                                                   /* lw $18,18*4($1) */
 678                 MIPS32_LW(19,19*4,1),                                                   /* lw $19,19*4($1) */
 679                 MIPS32_LW(20,20*4,1),                                                   /* lw $20,20*4($1) */
 680                 MIPS32_LW(21,21*4,1),                                                   /* lw $21,21*4($1) */
 681                 MIPS32_LW(22,22*4,1),                                                   /* lw $22,22*4($1) */
 682                 MIPS32_LW(23,23*4,1),                                                   /* lw $23,23*4($1) */
 683                 MIPS32_LW(24,24*4,1),                                                   /* lw $24,24*4($1) */
 684                 MIPS32_LW(25,25*4,1),                                                   /* lw $25,25*4($1) */
 685                 MIPS32_LW(26,26*4,1),                                                   /* lw $26,26*4($1) */
 686                 MIPS32_LW(27,27*4,1),                                                   /* lw $27,27*4($1) */
 687                 MIPS32_LW(28,28*4,1),                                                   /* lw $28,28*4($1) */
 688                 MIPS32_LW(29,29*4,1),                                                   /* lw $29,29*4($1) */
 689                 MIPS32_LW(30,30*4,1),                                                   /* lw $30,30*4($1) */
 690                 MIPS32_LW(31,31*4,1),                                                   /* lw $31,31*4($1) */
 691
 692                 MIPS32_MFC0(1,31,0),                                                    /* move COP0 DeSave to $1 */
 693                 MIPS32_NOP,
 694                 MIPS32_B(NEG16(41)),                                                    /* b start */
 695                 MIPS32_NOP,
 696         };
 697
 698         int retval;
 699
 700         retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 701                 32, regs, 0, NULL, 1);
 702
 703         return retval;
 704 }
 705
 706 int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, u32 *regs)
 707 {
 708         u32 code[] = {
 709                                                                                                                 /* start: */
 710                 MIPS32_MTC0(2,31,0),                                                    /* move $2 to COP0 DeSave */
 711                 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)),  /* $2 = MIPS32_PRACC_PARAM_OUT */
 712                 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 713                 MIPS32_SW(0,0*4,2),                                                             /* sw $0,0*4($2) */
 714                 MIPS32_SW(1,1*4,2),                                                     /* sw $1,1*4($2) */
 715                 MIPS32_SW(15,15*4,2),                                                   /* sw $15,15*4($2) */
 716                 MIPS32_MFC0(2,31,0),                                                    /* move COP0 DeSave to $2 */
 717                 MIPS32_MTC0(15,31,0),                                                   /* move $15 to COP0 DeSave */
 718                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),     /* $15 = MIPS32_PRACC_STACK */
 719                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 720                 MIPS32_SW(1,0,15),                                                              /* sw $1,($15) */
 721                 MIPS32_SW(2,0,15),                                                              /* sw $2,($15) */
 722                 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)),  /* $1 = MIPS32_PRACC_PARAM_OUT */
 723                 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 724                 MIPS32_SW(2,2*4,1),                                                     /* sw $2,2*4($1) */
 725                 MIPS32_SW(3,3*4,1),                                                     /* sw $3,3*4($1) */
 726                 MIPS32_SW(4,4*4,1),                                                     /* sw $4,4*4($1) */
 727                 MIPS32_SW(5,5*4,1),                                                     /* sw $5,5*4($1) */
 728                 MIPS32_SW(6,6*4,1),                                                     /* sw $6,6*4($1) */
 729                 MIPS32_SW(7,7*4,1),                                                     /* sw $7,7*4($1) */
 730                 MIPS32_SW(8,8*4,1),                                                     /* sw $8,8*4($1) */
 731                 MIPS32_SW(9,9*4,1),                                                     /* sw $9,9*4($1) */
 732                 MIPS32_SW(10,10*4,1),                                                   /* sw $10,10*4($1) */
 733                 MIPS32_SW(11,11*4,1),                                                   /* sw $11,11*4($1) */
 734                 MIPS32_SW(12,12*4,1),                                                   /* sw $12,12*4($1) */
 735                 MIPS32_SW(13,13*4,1),                                                   /* sw $13,13*4($1) */
 736                 MIPS32_SW(14,14*4,1),                                                   /* sw $14,14*4($1) */
 737                 MIPS32_SW(16,16*4,1),                                                   /* sw $16,16*4($1) */
 738                 MIPS32_SW(17,17*4,1),                                                   /* sw $17,17*4($1) */
 739                 MIPS32_SW(18,18*4,1),                                                   /* sw $18,18*4($1) */
 740                 MIPS32_SW(19,19*4,1),                                                   /* sw $19,19*4($1) */
 741                 MIPS32_SW(20,20*4,1),                                                   /* sw $20,20*4($1) */
 742                 MIPS32_SW(21,21*4,1),                                                   /* sw $21,21*4($1) */
 743                 MIPS32_SW(22,22*4,1),                                                   /* sw $22,22*4($1) */
 744                 MIPS32_SW(23,23*4,1),                                                   /* sw $23,23*4($1) */
 745                 MIPS32_SW(24,24*4,1),                                                   /* sw $24,24*4($1) */
 746                 MIPS32_SW(25,25*4,1),                                                   /* sw $25,25*4($1) */
 747                 MIPS32_SW(26,26*4,1),                                                   /* sw $26,26*4($1) */
 748                 MIPS32_SW(27,27*4,1),                                                   /* sw $27,27*4($1) */
 749                 MIPS32_SW(28,28*4,1),                                                   /* sw $28,28*4($1) */
 750                 MIPS32_SW(29,29*4,1),                                                   /* sw $29,29*4($1) */
 751                 MIPS32_SW(30,30*4,1),                                                   /* sw $30,30*4($1) */
 752                 MIPS32_SW(31,31*4,1),                                                   /* sw $31,31*4($1) */
 753
 754                 MIPS32_MFC0(2,12,0),                                                    /* move status to $2 */
 755                 MIPS32_SW(2,32*4,1),                                                    /* sw $2,32*4($1) */
 756                 MIPS32_LO(2),                                                                   /* move lo to $2 */
 757                 MIPS32_SW(2,33*4,1),                                                    /* sw $2,33*4($1) */
 758                 MIPS32_HI(2),                                                                   /* move hi to $2 */
 759                 MIPS32_SW(2,34*4,1),                                                    /* sw $2,34*4($1) */
 760                 MIPS32_MFC0(2,8,0),                                                             /* move badvaddr to $2 */
 761                 MIPS32_SW(2,35*4,1),                                                    /* sw $2,35*4($1) */
 762                 MIPS32_MFC0(2,13,0),                                                    /* move cause to $2 */
 763                 MIPS32_SW(2,36*4,1),                                                    /* sw $2,36*4($1) */
 764                 MIPS32_MFC0(2,24,0),                                                    /* move pc to $2 */
 765                 MIPS32_SW(2,37*4,1),                                                    /* sw $2,37*4($1) */
 766
 767                 MIPS32_LW(2,0,15),                                                              /* sw $2,($15) */
 768                 MIPS32_LW(1,0,15),                                                              /* sw $1,($15) */
 769                 MIPS32_MFC0(15,31,0),                                                   /* move COP0 DeSave to $15 */
 770                 MIPS32_NOP,
 771                 MIPS32_B(NEG16(60)),                                                    /* b start */
 772                 MIPS32_NOP,
 773         };
 774
 775         int retval;
 776
 777         retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 778                 0, NULL, 38, regs, 1);
 779
 780         return retval;
 781 }