- correct the register hi/lo read - wrong way round
[openocd.git] / src / target / mips32_pracc.c
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 $11,($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), /* lw $11,($15) */
262 MIPS32_LW(10,0,15), /* lw $10,($15) */
263 MIPS32_LW(9,0,15), /* lw $9,($15) */
264 MIPS32_LW(8,0,15), /* lw $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 $11,($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), /* lw $11,($15) */
335 MIPS32_LW(10,0,15), /* lw $10,($15) */
336 MIPS32_LW(9,0,15), /* lw $9,($15) */
337 MIPS32_LW(8,0,15), /* lw $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 $11,($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), /* lw $11,($15) */
414 MIPS32_LW(10,0,15), /* lw $10,($15) */
415 MIPS32_LW(9,0,15), /* lw $9,($15) */
416 MIPS32_LW(8,0,15), /* lw $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 $11,($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), /* lw $11,($15) */
507 MIPS32_LW(10,0,15), /* lw $10,($15) */
508 MIPS32_LW(9,0,15), /* lw $9,($15) */
509 MIPS32_LW(8,0,15), /* lw $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 $11,($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), /* lw $11,($15) */
563 MIPS32_LW(10,0,15), /* lw $10,($15) */
564 MIPS32_LW(9,0,15), /* lw $9,($15) */
565 MIPS32_LW(8,0,15), /* lw $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 $11,($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), /* lw $11,($15) */
623 MIPS32_LW(10,0,15), /* lw $10,($15) */
624 MIPS32_LW(9,0,15), /* lw $9,($15) */
625 MIPS32_LW(8,0,15), /* lw $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 u32 code[] = {
653 /* start: */
654 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $2 = MIPS32_PRACC_PARAM_IN */
655 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_IN)),
656 MIPS32_LW(1,1*4,2), /* lw $1,1*4($2) */
657 MIPS32_LW(15,15*4,2), /* lw $15,15*4($2) */
658 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
659 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
660 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
661 MIPS32_SW(1,0,15), /* sw $1,($15) */
662 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $1 = MIPS32_PRACC_PARAM_IN */
663 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_IN)),
664 MIPS32_LW(3,3*4,1), /* lw $3,3*4($1) */
665 MIPS32_LW(4,4*4,1), /* lw $4,4*4($1) */
666 MIPS32_LW(5,5*4,1), /* lw $5,5*4($1) */
667 MIPS32_LW(6,6*4,1), /* lw $6,6*4($1) */
668 MIPS32_LW(7,7*4,1), /* lw $7,7*4($1) */
669 MIPS32_LW(8,8*4,1), /* lw $8,8*4($1) */
670 MIPS32_LW(9,9*4,1), /* lw $9,9*4($1) */
671 MIPS32_LW(10,10*4,1), /* lw $10,10*4($1) */
672 MIPS32_LW(11,11*4,1), /* lw $11,11*4($1) */
673 MIPS32_LW(12,12*4,1), /* lw $12,12*4($1) */
674 MIPS32_LW(13,13*4,1), /* lw $13,13*4($1) */
675 MIPS32_LW(14,14*4,1), /* lw $14,14*4($1) */
676 MIPS32_LW(16,16*4,1), /* lw $16,16*4($1) */
677 MIPS32_LW(17,17*4,1), /* lw $17,17*4($1) */
678 MIPS32_LW(18,18*4,1), /* lw $18,18*4($1) */
679 MIPS32_LW(19,19*4,1), /* lw $19,19*4($1) */
680 MIPS32_LW(20,20*4,1), /* lw $20,20*4($1) */
681 MIPS32_LW(21,21*4,1), /* lw $21,21*4($1) */
682 MIPS32_LW(22,22*4,1), /* lw $22,22*4($1) */
683 MIPS32_LW(23,23*4,1), /* lw $23,23*4($1) */
684 MIPS32_LW(24,24*4,1), /* lw $24,24*4($1) */
685 MIPS32_LW(25,25*4,1), /* lw $25,25*4($1) */
686 MIPS32_LW(26,26*4,1), /* lw $26,26*4($1) */
687 MIPS32_LW(27,27*4,1), /* lw $27,27*4($1) */
688 MIPS32_LW(28,28*4,1), /* lw $28,28*4($1) */
689 MIPS32_LW(29,29*4,1), /* lw $29,29*4($1) */
690 MIPS32_LW(30,30*4,1), /* lw $30,30*4($1) */
691 MIPS32_LW(31,31*4,1), /* lw $31,31*4($1) */
692
693 MIPS32_LW(2,32*4,1), /* lw $2,32*4($1) */
694 MIPS32_MTC0(2,12,0), /* move $2 to status */
695 MIPS32_LW(2,33*4,1), /* lw $2,33*4($1) */
696 MIPS32_MTLO(2), /* move $2 to lo */
697 MIPS32_LW(2,34*4,1), /* lw $2,34*4($1) */
698 MIPS32_MTHI(2), /* move $2 to hi */
699 MIPS32_LW(2,35*4,1), /* lw $2,35*4($1) */
700 MIPS32_MTC0(2,8,0), /* move $2 to badvaddr */
701 MIPS32_LW(2,36*4,1), /* lw $2,36*4($1) */
702 MIPS32_MTC0(2,13,0), /* move $2 to cause*/
703 MIPS32_LW(2,37*4,1), /* lw $2,37*4($1) */
704 MIPS32_MTC0(2,24,0), /* move $2 to pc */
705
706 MIPS32_LW(2,2*4,1), /* lw $2,2*4($1) */
707 MIPS32_LW(1,0,15), /* lw $1,($15) */
708 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
709 MIPS32_NOP,
710 MIPS32_B(NEG16(55)), /* b start */
711 MIPS32_NOP,
712 };
713
714 int retval;
715
716 retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
717 38, regs, 0, NULL, 1);
718
719 return retval;
720 }
721
722 int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, u32 *regs)
723 {
724 u32 code[] = {
725 /* start: */
726 MIPS32_MTC0(2,31,0), /* move $2 to COP0 DeSave */
727 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $2 = MIPS32_PRACC_PARAM_OUT */
728 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)),
729 MIPS32_SW(0,0*4,2), /* sw $0,0*4($2) */
730 MIPS32_SW(1,1*4,2), /* sw $1,1*4($2) */
731 MIPS32_SW(15,15*4,2), /* sw $15,15*4($2) */
732 MIPS32_MFC0(2,31,0), /* move COP0 DeSave to $2 */
733 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
734 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
735 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
736 MIPS32_SW(1,0,15), /* sw $1,($15) */
737 MIPS32_SW(2,0,15), /* sw $2,($15) */
738 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $1 = MIPS32_PRACC_PARAM_OUT */
739 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)),
740 MIPS32_SW(2,2*4,1), /* sw $2,2*4($1) */
741 MIPS32_SW(3,3*4,1), /* sw $3,3*4($1) */
742 MIPS32_SW(4,4*4,1), /* sw $4,4*4($1) */
743 MIPS32_SW(5,5*4,1), /* sw $5,5*4($1) */
744 MIPS32_SW(6,6*4,1), /* sw $6,6*4($1) */
745 MIPS32_SW(7,7*4,1), /* sw $7,7*4($1) */
746 MIPS32_SW(8,8*4,1), /* sw $8,8*4($1) */
747 MIPS32_SW(9,9*4,1), /* sw $9,9*4($1) */
748 MIPS32_SW(10,10*4,1), /* sw $10,10*4($1) */
749 MIPS32_SW(11,11*4,1), /* sw $11,11*4($1) */
750 MIPS32_SW(12,12*4,1), /* sw $12,12*4($1) */
751 MIPS32_SW(13,13*4,1), /* sw $13,13*4($1) */
752 MIPS32_SW(14,14*4,1), /* sw $14,14*4($1) */
753 MIPS32_SW(16,16*4,1), /* sw $16,16*4($1) */
754 MIPS32_SW(17,17*4,1), /* sw $17,17*4($1) */
755 MIPS32_SW(18,18*4,1), /* sw $18,18*4($1) */
756 MIPS32_SW(19,19*4,1), /* sw $19,19*4($1) */
757 MIPS32_SW(20,20*4,1), /* sw $20,20*4($1) */
758 MIPS32_SW(21,21*4,1), /* sw $21,21*4($1) */
759 MIPS32_SW(22,22*4,1), /* sw $22,22*4($1) */
760 MIPS32_SW(23,23*4,1), /* sw $23,23*4($1) */
761 MIPS32_SW(24,24*4,1), /* sw $24,24*4($1) */
762 MIPS32_SW(25,25*4,1), /* sw $25,25*4($1) */
763 MIPS32_SW(26,26*4,1), /* sw $26,26*4($1) */
764 MIPS32_SW(27,27*4,1), /* sw $27,27*4($1) */
765 MIPS32_SW(28,28*4,1), /* sw $28,28*4($1) */
766 MIPS32_SW(29,29*4,1), /* sw $29,29*4($1) */
767 MIPS32_SW(30,30*4,1), /* sw $30,30*4($1) */
768 MIPS32_SW(31,31*4,1), /* sw $31,31*4($1) */
769
770 MIPS32_MFC0(2,12,0), /* move status to $2 */
771 MIPS32_SW(2,32*4,1), /* sw $2,32*4($1) */
772 MIPS32_MFLO(2), /* move lo to $2 */
773 MIPS32_SW(2,33*4,1), /* sw $2,33*4($1) */
774 MIPS32_MFHI(2), /* move hi to $2 */
775 MIPS32_SW(2,34*4,1), /* sw $2,34*4($1) */
776 MIPS32_MFC0(2,8,0), /* move badvaddr to $2 */
777 MIPS32_SW(2,35*4,1), /* sw $2,35*4($1) */
778 MIPS32_MFC0(2,13,0), /* move cause to $2 */
779 MIPS32_SW(2,36*4,1), /* sw $2,36*4($1) */
780 MIPS32_MFC0(2,24,0), /* move pc to $2 */
781 MIPS32_SW(2,37*4,1), /* sw $2,37*4($1) */
782
783 MIPS32_LW(2,0,15), /* lw $2,($15) */
784 MIPS32_LW(1,0,15), /* lw $1,($15) */
785 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
786 MIPS32_NOP,
787 MIPS32_B(NEG16(60)), /* b start */
788 MIPS32_NOP,
789 };
790
791 int retval;
792
793 retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
794 0, NULL, 38, regs, 1);
795
796 return retval;
797 }