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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 <string.h>
  27 #include "log.h"
  28 #include "mips32.h"
  29 #include "mips32_pracc.h"
  30
  31 typedef struct {
  32         u32 *local_iparam;
  33         int num_iparam;
  34         u32 *local_oparam;
  35         int num_oparam;
  36         u32 *code;
  37         int code_len;
  38         u32 stack[32];
  39         int stack_offset;
  40         mips_ejtag_t *ejtag_info;
  41 } mips32_pracc_context;
  42
  43 static int wait_for_pracc_rw(mips_ejtag_t *ejtag_info, u32 *ctrl)
  44 {
  45         u32 ejtag_ctrl;
  46
  47         while (1)
  48         {
  49                 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL);
  50                 ejtag_ctrl = ejtag_info->ejtag_ctrl;
  51                 mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
  52                 if (ejtag_ctrl & EJTAG_CTRL_PRACC)
  53                         break;
  54                 LOG_DEBUG("DEBUGMODULE: No memory access in progress!\n");
  55                 return ERROR_JTAG_DEVICE_ERROR;
  56         }
  57
  58         *ctrl = ejtag_ctrl;
  59         return ERROR_OK;
  60 }
  61
  62 static int mips32_pracc_exec_read(mips32_pracc_context *ctx, u32 address)
  63 {
  64         mips_ejtag_t *ejtag_info = ctx->ejtag_info;
  65         int offset;
  66         u32 ejtag_ctrl, data;
  67
  68         if ((address >= MIPS32_PRACC_PARAM_IN)
  69                 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
  70         {
  71                 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
  72                 data = ctx->local_iparam[offset];
  73         }
  74         else if ((address >= MIPS32_PRACC_PARAM_OUT)
  75                 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
  76         {
  77                 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
  78                 data = ctx->local_oparam[offset];
  79         }
  80         else if ((address >= MIPS32_PRACC_TEXT)
  81                 && (address <= MIPS32_PRACC_TEXT + ctx->code_len*4))
  82         {
  83                 offset = (address - MIPS32_PRACC_TEXT) / 4;
  84                 data = ctx->code[offset];
  85         }
  86         else if (address == MIPS32_PRACC_STACK)
  87         {
  88                 /* save to our debug stack */
  89                 data = ctx->stack[--ctx->stack_offset];
  90         }
  91         else
  92         {
  93                 /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back
  94                  * to start of debug vector */
  95
  96                 data = 0;
  97                 LOG_ERROR("Error reading unexpected address");
  98                 return ERROR_JTAG_DEVICE_ERROR;
  99         }
 100
 101         /* Send the data out */
 102         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
 103         mips_ejtag_drscan_32(ctx->ejtag_info, &data);
 104
 105         /* Clear the access pending bit (let the processor eat!) */
 106         ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
 107         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL);
 108         mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
 109
 110         return ERROR_OK;
 111 }
 112
 113 static int mips32_pracc_exec_write(mips32_pracc_context *ctx, u32 address)
 114 {
 115         u32 ejtag_ctrl,data;
 116         int offset;
 117         mips_ejtag_t *ejtag_info = ctx->ejtag_info;
 118
 119         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
 120         mips_ejtag_drscan_32(ctx->ejtag_info, &data);
 121
 122         /* Clear access pending bit */
 123         ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
 124         mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL);
 125         mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
 126
 127         if ((address >= MIPS32_PRACC_PARAM_IN)
 128                 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
 129         {
 130                 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
 131                 ctx->local_iparam[offset] = data;
 132         }
 133         else if ((address >= MIPS32_PRACC_PARAM_OUT )
 134                 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
 135         {
 136                 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
 137                 ctx->local_oparam[offset] = data;
 138         }
 139         else if (address == MIPS32_PRACC_STACK)
 140         {
 141                 /* save data onto our stack */
 142                 ctx->stack[ctx->stack_offset++] = data;
 143         }
 144         else
 145         {
 146                 LOG_ERROR("Error writing unexpected address");
 147                 return ERROR_JTAG_DEVICE_ERROR;
 148         }
 149
 150         return ERROR_OK;
 151 }
 152
 153 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)
 154 {
 155         u32 ejtag_ctrl;
 156         u32 address, data;
 157         mips32_pracc_context ctx;
 158         int retval;
 159         int pass = 0;
 160
 161         ctx.local_iparam = param_in;
 162         ctx.local_oparam = param_out;
 163         ctx.num_iparam = num_param_in;
 164         ctx.num_oparam = num_param_out;
 165         ctx.code = code;
 166         ctx.code_len = code_len;
 167         ctx.ejtag_info = ejtag_info;
 168         ctx.stack_offset = 0;
 169
 170         while (1)
 171         {
 172                 if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
 173                         return retval;
 174
 175                 address = data = 0;
 176                 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL);
 177                 mips_ejtag_drscan_32(ejtag_info, &address);
 178
 179                 /* Check for read or write */
 180                 if (ejtag_ctrl & EJTAG_CTRL_PRNW)
 181                 {
 182                         if ((retval = mips32_pracc_exec_write(&ctx, address)) != ERROR_OK)
 183                                 return retval;
 184                 }
 185                 else
 186                 {
 187                         /* Check to see if its reading at the debug vector. The first pass through
 188                          * the module is always read at the vector, so the first one we allow.  When
 189                          * the second read from the vector occurs we are done and just exit. */
 190                         if ((address == MIPS32_PRACC_TEXT) && (pass++))
 191                         {
 192                                 break;
 193                         }
 194
 195                         if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK)
 196                                 return retval;
 197                 }
 198
 199                 if (cycle == 0)
 200                         break;
 201         }
 202
 203         /* stack sanity check */
 204         if (ctx.stack_offset != 0)
 205         {
 206                 LOG_DEBUG("Pracc Stack not zero");
 207         }
 208
 209         return ERROR_OK;
 210 }
 211
 212 int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf)
 213 {
 214         switch (size)
 215         {
 216                 case 1:
 217                         return mips32_pracc_read_mem8(ejtag_info, addr, count, (u8*)buf);
 218                 case 2:
 219                         return mips32_pracc_read_mem16(ejtag_info, addr, count, (u16*)buf);
 220                 case 4:
 221                         return mips32_pracc_read_mem32(ejtag_info, addr, count, (u32*)buf);
 222         }
 223
 224         return ERROR_OK;
 225 }
 226
 227 int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf)
 228 {
 229         u32 code[] = {
 230                                                                                                                         /* start: */
 231                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 232                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 233                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 234                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 235                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 236                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 237                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 238
 239                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 240                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 241                 MIPS32_LW(9,0,8),                                                                       /* $9=mem[$8]; read addr */
 242                 MIPS32_LW(10,4,8),                                                                      /* $10=mem[$8+4]; read count */
 243                 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)),         /* $11=MIPS32_PRACC_PARAM_OUT */
 244                 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 245                 MIPS32_NOP,
 246                                                                                                                         /* loop: */
 247                 MIPS32_BEQ(0,10,9),                                                                     /* beq 0, $10, end */
 248                 MIPS32_NOP,
 249
 250                 MIPS32_LW(12,0,9),                                                                      /* lw $12,0($9), Load $12 with the word @mem[$9] */
 251                 MIPS32_SW(12,0,11),                                                             /* sw $12,0($11) */
 252
 253                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 254                 MIPS32_ADDI(9,9,4),                                                             /* $1+=4 */
 255                 MIPS32_ADDI(11,11,4),                                                           /* $11+=4 */
 256
 257                 MIPS32_NOP,
 258                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 259                 MIPS32_NOP,
 260                                                                                                                         /* end: */
 261                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 262                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 263                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 264                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 265                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 266                 MIPS32_NOP,
 267                 MIPS32_B(NEG16(31)),                                                            /* b start */
 268                 MIPS32_NOP,
 269         };
 270
 271         int retval=ERROR_OK;
 272         int blocksize;
 273         int bytesread;
 274         u32 param_in[2];
 275
 276         bytesread = 0;
 277
 278         while (count > 0)
 279         {
 280                 blocksize = count;
 281                 if (count > 0x400)
 282                         blocksize = 0x400;
 283
 284                 param_in[0] = addr;
 285                 param_in[1] = blocksize;
 286
 287                 if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code,
 288                         sizeof(param_in)/sizeof(param_in[0]), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK)
 289                 {
 290                         return retval;
 291                 }
 292
 293                 count -= blocksize;
 294                 addr += blocksize;
 295                 bytesread += blocksize;
 296         }
 297
 298         return retval;
 299 }
 300
 301 int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info, u32 addr, int count, u16 *buf)
 302 {
 303         u32 code[] = {
 304                                                                                                                         /* start: */
 305                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 306                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 307                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 308                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 309                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 310                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 311                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 312
 313                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 314                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 315                 MIPS32_LW(9,0,8),                                                                       /* $9=mem[$8]; read addr */
 316                 MIPS32_LW(10,4,8),                                                                      /* $10=mem[$8+4]; read count */
 317                 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)),         /* $11=MIPS32_PRACC_PARAM_OUT */
 318                 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 319                 MIPS32_NOP,
 320                                                                                                                         /* loop: */
 321                 MIPS32_BEQ(0,10,9),                                                             /* beq 0, $10, end */
 322                 MIPS32_NOP,
 323
 324                 MIPS32_LHU(12,0,9),                                                             /* lw $12,0($9), Load $12 with the halfword @mem[$9] */
 325                 MIPS32_SW(12,0,11),                                                             /* sw $12,0($11) */
 326
 327                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 328                 MIPS32_ADDI(9,9,2),                                                             /* $9+=2 */
 329                 MIPS32_ADDI(11,11,4),                                                           /* $11+=4 */
 330                 MIPS32_NOP,
 331                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 332                 MIPS32_NOP,
 333
 334                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 335                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 336                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 337                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 338                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 339                 MIPS32_NOP,
 340                 MIPS32_B(NEG16(31)),                                                            /* b start */
 341                 MIPS32_NOP,
 342         };
 343
 344 //      /* TODO remove array */
 345         u32 param_out[count];
 346         int i;
 347
 348 //      int retval;
 349         int blocksize;
 350         int bytesread;
 351         u32 param_in[2];
 352
 353         bytesread = 0;
 354
 355         //while (count > 0)
 356         {
 357                 blocksize = count;
 358                 if (count > 0x400)
 359                         blocksize = 0x400;
 360
 361                 param_in[0] = addr;
 362                 param_in[1] = blocksize;
 363
 364                 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 365                         sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
 366
 367 //              count -= blocksize;
 368 //              addr += blocksize;
 369 //              bytesread += blocksize;
 370         }
 371
 372         for (i = 0; i < count; i++)
 373         {
 374                 buf[i] = param_out[i];
 375         }
 376
 377         return ERROR_OK;
 378 }
 379
 380 int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info, u32 addr, int count, u8 *buf)
 381 {
 382         u32 code[] = {
 383                                                                                                                         /* start: */
 384                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 385                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 386                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 387                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 388                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 389                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 390                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 391
 392                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 393                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 394                 MIPS32_LW(9,0,8),                                                                       /* $9=mem[$8]; read addr */
 395                 MIPS32_LW(10,4,8),                                                                      /* $10=mem[$8+4]; read count */
 396                 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)),         /* $11=MIPS32_PRACC_PARAM_OUT */
 397                 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 398                 MIPS32_NOP,
 399                                                                                                                         /* loop: */
 400                 MIPS32_BEQ(0,10,9),                                                             /* beq 0, $10, end */
 401                 MIPS32_NOP,
 402
 403                 MIPS32_LBU(12,0,9),                                                             /* lw $12,0($9), Load t4 with the byte @mem[t1] */
 404                 MIPS32_SW(12,0,11),                                                             /* sw $12,0($11) */
 405
 406                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 407                 MIPS32_ADDI(9,9,1),                                                             /* $9+=1 */
 408                 MIPS32_ADDI(11,11,4),                                                           /* $11+=4 */
 409                 MIPS32_NOP,
 410                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 411                 MIPS32_NOP,
 412                                                                                                                         /* end: */
 413                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 414                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 415                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 416                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 417                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 418                 MIPS32_NOP,
 419                 MIPS32_B(NEG16(31)),                                                            /* b start */
 420                 MIPS32_NOP,
 421         };
 422
 423 //      /* TODO remove array */
 424         u32 param_out[count];
 425         int i;
 426
 427 //      int retval;
 428         int blocksize;
 429         int bytesread;
 430         u32 param_in[2];
 431
 432         bytesread = 0;
 433
 434 //      while (count > 0)
 435         {
 436                 blocksize = count;
 437                 if (count > 0x400)
 438                         blocksize = 0x400;
 439
 440                 param_in[0] = addr;
 441                 param_in[1] = blocksize;
 442
 443                 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 444                         sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
 445
 446 //              count -= blocksize;
 447 //              addr += blocksize;
 448 //              bytesread += blocksize;
 449         }
 450
 451         for (i = 0; i < count; i++)
 452         {
 453                 buf[i] = param_out[i];
 454         }
 455
 456         return ERROR_OK;
 457 }
 458
 459 int mips32_pracc_write_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf)
 460 {
 461         switch (size)
 462         {
 463                 case 1:
 464                         return mips32_pracc_write_mem8(ejtag_info, addr, count, (u8*)buf);
 465                 case 2:
 466                         return mips32_pracc_write_mem16(ejtag_info, addr, count,(u16*)buf);
 467                 case 4:
 468                         return mips32_pracc_write_mem32(ejtag_info, addr, count, (u32*)buf);
 469         }
 470
 471         return ERROR_OK;
 472 }
 473
 474 int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf)
 475 {
 476         u32 code[] = {
 477                                                                                                                         /* start: */
 478                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 479                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 480                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 481                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 482                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 483                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 484                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 485
 486                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 487                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 488                 MIPS32_LW(9,0,8),                                                                       /* Load write addr to $9 */
 489                 MIPS32_LW(10,4,8),                                                                      /* Load write count to $10 */
 490                 MIPS32_ADDI(8,8,8),                                                             /* $8+=8 */
 491                 MIPS32_NOP,
 492                                                                                                                         /* loop: */
 493                 MIPS32_BEQ(0,10,9),                                                                     /* beq $0, $10, end */
 494                 MIPS32_NOP,
 495
 496                 MIPS32_LW(11,0,8),                                                                      /* lw $11,0($8), Load $11 with the word @mem[$8] */
 497                 MIPS32_SW(11,0,9),                                                                      /* sw $11,0($9) */
 498
 499                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 500                 MIPS32_ADDI(9,9,4),                                                             /* $9+=4 */
 501                 MIPS32_ADDI(8,8,4),                                                             /* $8+=4 */
 502                 MIPS32_NOP,
 503                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 504                 MIPS32_NOP,
 505                                                                                                                         /* end: */
 506                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 507                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 508                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 509                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 510                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 511                 MIPS32_NOP,
 512                 MIPS32_B(NEG16(30)),                                                            /* b start */
 513                 MIPS32_NOP,
 514         };
 515
 516         /* TODO remove array */
 517         u32 param_in[count+2];
 518         param_in[0] = addr;
 519         param_in[1] = count;
 520
 521         memcpy(&param_in[2], buf, count * sizeof(u32));
 522
 523         mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 524                 sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1);
 525
 526         return ERROR_OK;
 527 }
 528
 529 int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info, u32 addr, int count, u16 *buf)
 530 {
 531         u32 code[] = {
 532                                                                                                                         /* start: */
 533                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 534                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 535                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 536                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 537                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 538                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 539                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 540
 541                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 542                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 543                 MIPS32_LW(9,0,8),                                                                       /* Load write addr to $9 */
 544                 MIPS32_LW(10,4,8),                                                                      /* Load write count to $10 */
 545                 MIPS32_ADDI(8,8,8),                                                             /* $8+=8 */
 546                 MIPS32_NOP,
 547                                                                                                                         /* loop: */
 548                 MIPS32_BEQ(0,10,9),                                                                     /* beq $0, $10, end */
 549                 MIPS32_NOP,
 550
 551                 MIPS32_LW(11,0,8),                                                                      /* lw $11,0($8), Load $11 with the word @mem[$8] */
 552                 MIPS32_SH(11,0,9),                                                                      /* sh $11,0($9) */
 553
 554                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 555                 MIPS32_ADDI(9,9,2),                                                             /* $9+=2 */
 556                 MIPS32_ADDI(8,8,4),                                                             /* $8+=4 */
 557
 558                 MIPS32_NOP,
 559                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 560                 MIPS32_NOP,
 561                                                                                                                         /* end: */
 562                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 563                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 564                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 565                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 566                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 567                 MIPS32_NOP,
 568                 MIPS32_B(NEG16(30)),                                                            /* b start */
 569                 MIPS32_NOP,
 570         };
 571
 572         /* TODO remove array */
 573         u32 param_in[count+2];
 574         int i;
 575         param_in[0] = addr;
 576         param_in[1] = count;
 577
 578         for (i = 0; i < count; i++)
 579         {
 580                 param_in[i+2] = buf[i];
 581         }
 582
 583         mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 584                 sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
 585
 586         return ERROR_OK;
 587 }
 588
 589 int mips32_pracc_write_mem8(mips_ejtag_t *ejtag_info, u32 addr, int count, u8 *buf)
 590 {
 591         u32 code[] = {
 592                                                                                                                         /* start: */
 593                 MIPS32_MTC0(15,31,0),                                                           /* move $15 to COP0 DeSave */
 594                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),             /* $15 = MIPS32_PRACC_STACK */
 595                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 596                 MIPS32_SW(8,0,15),                                                                      /* sw $8,($15) */
 597                 MIPS32_SW(9,0,15),                                                                      /* sw $9,($15) */
 598                 MIPS32_SW(10,0,15),                                                             /* sw $10,($15) */
 599                 MIPS32_SW(11,0,15),                                                             /* sw $10,($15) */
 600
 601                 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)),           /* $8 = MIPS32_PRACC_PARAM_IN */
 602                 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
 603                 MIPS32_LW(9,0,8),                                                                       /* Load write addr to $9 */
 604                 MIPS32_LW(10,4,8),                                                                      /* Load write count to $10 */
 605                 MIPS32_ADDI(8,8,8),                                                             /* $8+=8 */
 606                 MIPS32_NOP,
 607                                                                                                                         /* loop: */
 608                 MIPS32_BEQ(0,10,9),                                                                     /* beq $0, $10, end */
 609                 MIPS32_NOP,
 610
 611                 MIPS32_LW(11,0,8),                                                                      /* lw $11,0($8), Load $11 with the word @mem[$8] */
 612                 MIPS32_SB(11,0,9),                                                                      /* sb $11,0($9) */
 613
 614                 MIPS32_ADDI(10,10,NEG16(1)),                                            /* $10-- */
 615                 MIPS32_ADDI(9,9,1),                                                             /* $9+=1 */
 616                 MIPS32_ADDI(8,8,4),                                                             /* $8+=4 */
 617
 618                 MIPS32_NOP,
 619                 MIPS32_B(NEG16(9)),                                                                     /* b loop */
 620                 MIPS32_NOP,
 621                                                                                                                         /* end: */
 622                 MIPS32_LW(11,0,15),                                                             /* sw $11,($15) */
 623                 MIPS32_LW(10,0,15),                                                             /* sw $10,($15) */
 624                 MIPS32_LW(9,0,15),                                                                      /* sw $9,($15) */
 625                 MIPS32_LW(8,0,15),                                                                      /* sw $8,($15) */
 626                 MIPS32_MFC0(15,31,0),                                                           /* move COP0 DeSave to $15 */
 627                 MIPS32_NOP,
 628                 MIPS32_B(NEG16(30)),                                                            /* b start */
 629                 MIPS32_NOP,
 630         };
 631
 632         /* TODO remove array */
 633         u32 param_in[count+2];
 634         int retval;
 635         int i;
 636         param_in[0] = addr;
 637         param_in[1] = count;
 638
 639         for (i = 0; i < count; i++)
 640         {
 641                 param_in[i+2] = buf[i];
 642         }
 643
 644         retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 645                 sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
 646
 647         return retval;
 648 }
 649
 650 int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, u32 *regs)
 651 {
 652         /* TODO restore all core registers */
 653
 654         u32 code[] = {
 655                                                                                                                 /* start: */
 656                 MIPS32_MTC0(2,31,0),                                                    /* move $2 to COP0 DeSave */
 657                 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)),   /* $2 = MIPS32_PRACC_PARAM_IN */
 658                 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_IN)),
 659                 /*MIPS32_LW(0,0*4,2),*/                                                 /* lw $0,0*4($2) */
 660                 MIPS32_LW(1,1*4,2),                                                     /* lw $1,1*4($2) */
 661                 MIPS32_MFC0(2,31,0),                                                    /* move COP0 DeSave to $2 */
 662
 663                 MIPS32_MTC0(1,31,0),                                                    /* move $1 to COP0 DeSave */
 664                 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_IN)),   /* $1 = MIPS32_PRACC_PARAM_IN */
 665                 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_IN)),
 666                 MIPS32_LW(2,2*4,1),                                                     /* lw $2,2*4($1) */
 667                 MIPS32_LW(3,3*4,1),                                                     /* lw $3,3*4($1) */
 668                 MIPS32_LW(4,4*4,1),                                                     /* lw $4,4*4($1) */
 669                 MIPS32_LW(5,5*4,1),                                                     /* lw $5,5*4($1) */
 670                 MIPS32_LW(6,6*4,1),                                                     /* lw $6,6*4($1) */
 671                 MIPS32_LW(7,7*4,1),                                                     /* lw $7,7*4($1) */
 672                 MIPS32_LW(8,8*4,1),                                                     /* lw $8,8*4($1) */
 673                 MIPS32_LW(9,9*4,1),                                                     /* lw $9,9*4($1) */
 674                 MIPS32_LW(10,10*4,1),                                                   /* lw $10,10*4($1) */
 675                 MIPS32_LW(11,11*4,1),                                                   /* lw $11,11*4($1) */
 676                 MIPS32_LW(12,12*4,1),                                                   /* lw $12,12*4($1) */
 677                 MIPS32_LW(13,13*4,1),                                                   /* lw $13,13*4($1) */
 678                 MIPS32_LW(14,14*4,1),                                                   /* lw $14,14*4($1) */
 679                 MIPS32_LW(15,15*4,1),                                                   /* lw $15,15*4($1) */
 680                 MIPS32_LW(16,16*4,1),                                                   /* lw $16,16*4($1) */
 681                 MIPS32_LW(17,17*4,1),                                                   /* lw $17,17*4($1) */
 682                 MIPS32_LW(18,18*4,1),                                                   /* lw $18,18*4($1) */
 683                 MIPS32_LW(19,19*4,1),                                                   /* lw $19,19*4($1) */
 684                 MIPS32_LW(20,20*4,1),                                                   /* lw $20,20*4($1) */
 685                 MIPS32_LW(21,21*4,1),                                                   /* lw $21,21*4($1) */
 686                 MIPS32_LW(22,22*4,1),                                                   /* lw $22,22*4($1) */
 687                 MIPS32_LW(23,23*4,1),                                                   /* lw $23,23*4($1) */
 688                 MIPS32_LW(24,24*4,1),                                                   /* lw $24,24*4($1) */
 689                 MIPS32_LW(25,25*4,1),                                                   /* lw $25,25*4($1) */
 690                 MIPS32_LW(26,26*4,1),                                                   /* lw $26,26*4($1) */
 691                 MIPS32_LW(27,27*4,1),                                                   /* lw $27,27*4($1) */
 692                 MIPS32_LW(28,28*4,1),                                                   /* lw $28,28*4($1) */
 693                 MIPS32_LW(29,29*4,1),                                                   /* lw $29,29*4($1) */
 694                 MIPS32_LW(30,30*4,1),                                                   /* lw $30,30*4($1) */
 695                 MIPS32_LW(31,31*4,1),                                                   /* lw $31,31*4($1) */
 696
 697                 MIPS32_MFC0(1,31,0),                                                    /* move COP0 DeSave to $1 */
 698                 MIPS32_NOP,
 699                 MIPS32_B(NEG16(41)),                                                    /* b start */
 700                 MIPS32_NOP,
 701         };
 702
 703         int retval;
 704
 705         retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 706                 32, regs, 0, NULL, 1);
 707
 708         return retval;
 709 }
 710
 711 int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, u32 *regs)
 712 {
 713         u32 code[] = {
 714                                                                                                                 /* start: */
 715                 MIPS32_MTC0(2,31,0),                                                    /* move $2 to COP0 DeSave */
 716                 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)),  /* $2 = MIPS32_PRACC_PARAM_OUT */
 717                 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 718                 MIPS32_SW(0,0*4,2),                                                             /* sw $0,0*4($2) */
 719                 MIPS32_SW(1,1*4,2),                                                     /* sw $1,1*4($2) */
 720                 MIPS32_SW(15,15*4,2),                                                   /* sw $15,15*4($2) */
 721                 MIPS32_MFC0(2,31,0),                                                    /* move COP0 DeSave to $2 */
 722                 MIPS32_MTC0(15,31,0),                                                   /* move $15 to COP0 DeSave */
 723                 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),     /* $15 = MIPS32_PRACC_STACK */
 724                 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
 725                 MIPS32_SW(1,0,15),                                                              /* sw $1,($15) */
 726                 MIPS32_SW(2,0,15),                                                              /* sw $2,($15) */
 727                 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)),  /* $1 = MIPS32_PRACC_PARAM_OUT */
 728                 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 729                 MIPS32_SW(2,2*4,1),                                                     /* sw $2,2*4($1) */
 730                 MIPS32_SW(3,3*4,1),                                                     /* sw $3,3*4($1) */
 731                 MIPS32_SW(4,4*4,1),                                                     /* sw $4,4*4($1) */
 732                 MIPS32_SW(5,5*4,1),                                                     /* sw $5,5*4($1) */
 733                 MIPS32_SW(6,6*4,1),                                                     /* sw $6,6*4($1) */
 734                 MIPS32_SW(7,7*4,1),                                                     /* sw $7,7*4($1) */
 735                 MIPS32_SW(8,8*4,1),                                                     /* sw $8,8*4($1) */
 736                 MIPS32_SW(9,9*4,1),                                                     /* sw $9,9*4($1) */
 737                 MIPS32_SW(10,10*4,1),                                                   /* sw $10,10*4($1) */
 738                 MIPS32_SW(11,11*4,1),                                                   /* sw $11,11*4($1) */
 739                 MIPS32_SW(12,12*4,1),                                                   /* sw $12,12*4($1) */
 740                 MIPS32_SW(13,13*4,1),                                                   /* sw $13,13*4($1) */
 741                 MIPS32_SW(14,14*4,1),                                                   /* sw $14,14*4($1) */
 742                 MIPS32_SW(16,16*4,1),                                                   /* sw $16,16*4($1) */
 743                 MIPS32_SW(17,17*4,1),                                                   /* sw $17,17*4($1) */
 744                 MIPS32_SW(18,18*4,1),                                                   /* sw $18,18*4($1) */
 745                 MIPS32_SW(19,19*4,1),                                                   /* sw $19,19*4($1) */
 746                 MIPS32_SW(20,20*4,1),                                                   /* sw $20,20*4($1) */
 747                 MIPS32_SW(21,21*4,1),                                                   /* sw $21,21*4($1) */
 748                 MIPS32_SW(22,22*4,1),                                                   /* sw $22,22*4($1) */
 749                 MIPS32_SW(23,23*4,1),                                                   /* sw $23,23*4($1) */
 750                 MIPS32_SW(24,24*4,1),                                                   /* sw $24,24*4($1) */
 751                 MIPS32_SW(25,25*4,1),                                                   /* sw $25,25*4($1) */
 752                 MIPS32_SW(26,26*4,1),                                                   /* sw $26,26*4($1) */
 753                 MIPS32_SW(27,27*4,1),                                                   /* sw $27,27*4($1) */
 754                 MIPS32_SW(28,28*4,1),                                                   /* sw $28,28*4($1) */
 755                 MIPS32_SW(29,29*4,1),                                                   /* sw $29,29*4($1) */
 756                 MIPS32_SW(30,30*4,1),                                                   /* sw $30,30*4($1) */
 757                 MIPS32_SW(31,31*4,1),                                                   /* sw $31,31*4($1) */
 758
 759                 MIPS32_MFC0(2,12,0),                                                    /* move status to $2 */
 760                 MIPS32_SW(2,32*4,1),                                                    /* sw $2,32*4($1) */
 761                 MIPS32_LO(2),                                                                   /* move lo to $2 */
 762                 MIPS32_SW(2,33*4,1),                                                    /* sw $2,33*4($1) */
 763                 MIPS32_HI(2),                                                                   /* move hi to $2 */
 764                 MIPS32_SW(2,34*4,1),                                                    /* sw $2,34*4($1) */
 765                 MIPS32_MFC0(2,8,0),                                                             /* move badvaddr to $2 */
 766                 MIPS32_SW(2,35*4,1),                                                    /* sw $2,35*4($1) */
 767                 MIPS32_MFC0(2,13,0),                                                    /* move cause to $2 */
 768                 MIPS32_SW(2,36*4,1),                                                    /* sw $2,36*4($1) */
 769                 MIPS32_MFC0(2,24,0),                                                    /* move pc to $2 */
 770                 MIPS32_SW(2,37*4,1),                                                    /* sw $2,37*4($1) */
 771
 772                 MIPS32_LW(2,0,15),                                                              /* sw $2,($15) */
 773                 MIPS32_LW(1,0,15),                                                              /* sw $1,($15) */
 774                 MIPS32_MFC0(15,31,0),                                                   /* move COP0 DeSave to $15 */
 775                 MIPS32_NOP,
 776                 MIPS32_B(NEG16(60)),                                                    /* b start */
 777                 MIPS32_NOP,
 778         };
 779
 780         int retval;
 781
 782         retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
 783                 0, NULL, 38, regs, 1);
 784
 785         return retval;
 786 }