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improve mips32_pracc_context
[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
23 /*
24 This version has optimized assembly routines for 32 bit operations:
25 - read word
26 - write word
27 - write array of words
28
29 One thing to be aware of is that the MIPS32 cpu will execute the
30 instruction after a branch instruction (one delay slot).
31
32 For example:
33
34
35 LW $2, ($5 +10)
36 B foo
37 LW $1, ($2 +100)
38
39 The LW $1, ($2 +100) instruction is also executed. If this is
40 not wanted a NOP can be inserted:
41
42 LW $2, ($5 +10)
43 B foo
44 NOP
45 LW $1, ($2 +100)
46
47 or the code can be changed to:
48
49 B foo
50 LW $2, ($5 +10)
51 LW $1, ($2 +100)
52
53 The original code contained NOPs. I have removed these and moved
54 the branches.
55
56 I also moved the PRACC_STACK to 0xFF204000. This allows
57 the use of 16 bits offsets to get pointers to the input
58 and output area relative to the stack. Note that the stack
59 isn't really a stack (the stack pointer is not 'moving')
60 but a FIFO simulated in software.
61
62 These changes result in a 35% speed increase when programming an
63 external flash.
64
65 More improvement could be gained if the registers do no need
66 to be preserved but in that case the routines should be aware
67 OpenOCD is used as a flash programmer or as a debug tool.
68
69 Nico Coesel
70 */
71
72
73 #ifdef HAVE_CONFIG_H
74 #include "config.h"
75 #endif
76
77 #include "mips32.h"
78 #include "mips32_pracc.h"
79
80 struct mips32_pracc_context
81 {
82 uint32_t *local_iparam;
83 int num_iparam;
84 uint32_t *local_oparam;
85 int num_oparam;
86 uint32_t *code;
87 int code_len;
88 uint32_t stack[32];
89 int stack_offset;
90 struct mips_ejtag *ejtag_info;
91 };
92
93 static int wait_for_pracc_rw(struct mips_ejtag *ejtag_info, uint32_t *ctrl)
94 {
95 uint32_t ejtag_ctrl;
96
97 while (1)
98 {
99 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL);
100 ejtag_ctrl = ejtag_info->ejtag_ctrl;
101 mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
102 if (ejtag_ctrl & EJTAG_CTRL_PRACC)
103 break;
104 LOG_DEBUG("DEBUGMODULE: No memory access in progress!\n");
105 return ERROR_JTAG_DEVICE_ERROR;
106 }
107
108 *ctrl = ejtag_ctrl;
109 return ERROR_OK;
110 }
111
112 static int mips32_pracc_exec_read(struct mips32_pracc_context *ctx, uint32_t address)
113 {
114 struct mips_ejtag *ejtag_info = ctx->ejtag_info;
115 int offset;
116 uint32_t ejtag_ctrl, data;
117
118 if ((address >= MIPS32_PRACC_PARAM_IN)
119 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
120 {
121 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
122 data = ctx->local_iparam[offset];
123 }
124 else if ((address >= MIPS32_PRACC_PARAM_OUT)
125 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
126 {
127 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
128 data = ctx->local_oparam[offset];
129 }
130 else if ((address >= MIPS32_PRACC_TEXT)
131 && (address <= MIPS32_PRACC_TEXT + ctx->code_len*4))
132 {
133 offset = (address - MIPS32_PRACC_TEXT) / 4;
134 data = ctx->code[offset];
135 }
136 else if (address == MIPS32_PRACC_STACK)
137 {
138 /* save to our debug stack */
139 data = ctx->stack[--ctx->stack_offset];
140 }
141 else
142 {
143 /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back
144 * to start of debug vector */
145
146 data = 0;
147 LOG_ERROR("Error reading unexpected address %8.8" PRIx32 "", address);
148 return ERROR_JTAG_DEVICE_ERROR;
149 }
150
151 /* Send the data out */
152 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
153 mips_ejtag_drscan_32(ctx->ejtag_info, &data);
154
155 /* Clear the access pending bit (let the processor eat!) */
156
157 ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
158 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL);
159 mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
160
161 jtag_add_clocks(5);
162 jtag_execute_queue();
163
164
165 return ERROR_OK;
166 }
167
168 static int mips32_pracc_exec_write(struct mips32_pracc_context *ctx, uint32_t address)
169 {
170 uint32_t ejtag_ctrl,data;
171 int offset;
172 struct mips_ejtag *ejtag_info = ctx->ejtag_info;
173
174 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
175 mips_ejtag_drscan_32(ctx->ejtag_info, &data);
176
177 /* Clear access pending bit */
178 ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
179 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL);
180 mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
181
182 jtag_add_clocks(5);
183 jtag_execute_queue();
184
185 if ((address >= MIPS32_PRACC_PARAM_IN)
186 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
187 {
188 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
189 ctx->local_iparam[offset] = data;
190 }
191 else if ((address >= MIPS32_PRACC_PARAM_OUT)
192 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
193 {
194 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
195 ctx->local_oparam[offset] = data;
196 }
197 else if (address == MIPS32_PRACC_STACK)
198 {
199 /* save data onto our stack */
200 ctx->stack[ctx->stack_offset++] = data;
201 }
202 else
203 {
204 LOG_ERROR("Error writing unexpected address %8.8" PRIx32 "", address);
205 return ERROR_JTAG_DEVICE_ERROR;
206 }
207
208 return ERROR_OK;
209 }
210
211 int mips32_pracc_exec(struct mips_ejtag *ejtag_info, int code_len, uint32_t *code, int num_param_in, uint32_t *param_in, int num_param_out, uint32_t *param_out, int cycle)
212 {
213 uint32_t ejtag_ctrl;
214 uint32_t address, data;
215 struct mips32_pracc_context ctx;
216 int retval;
217 int pass = 0;
218
219 ctx.local_iparam = param_in;
220 ctx.local_oparam = param_out;
221 ctx.num_iparam = num_param_in;
222 ctx.num_oparam = num_param_out;
223 ctx.code = code;
224 ctx.code_len = code_len;
225 ctx.ejtag_info = ejtag_info;
226 ctx.stack_offset = 0;
227
228 while (1)
229 {
230 if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
231 return retval;
232
233 address = data = 0;
234 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL);
235 mips_ejtag_drscan_32(ejtag_info, &address);
236
237 // printf("Adres: %.8x\n", address);
238
239 /* Check for read or write */
240 if (ejtag_ctrl & EJTAG_CTRL_PRNW)
241 {
242 if ((retval = mips32_pracc_exec_write(&ctx, address)) != ERROR_OK)
243 return retval;
244 }
245 else
246 {
247 /* Check to see if its reading at the debug vector. The first pass through
248 * the module is always read at the vector, so the first one we allow. When
249 * the second read from the vector occurs we are done and just exit. */
250 if ((address == MIPS32_PRACC_TEXT) && (pass++))
251 {
252 break;
253 }
254
255 if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK)
256 return retval;
257
258 }
259
260 if (cycle == 0)
261 break;
262 }
263
264 /* stack sanity check */
265 if (ctx.stack_offset != 0)
266 {
267 LOG_DEBUG("Pracc Stack not zero");
268 }
269
270 return ERROR_OK;
271 }
272
273 int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
274 {
275 switch (size)
276 {
277 case 1:
278 return mips32_pracc_read_mem8(ejtag_info, addr, count, (uint8_t*)buf);
279 case 2:
280 return mips32_pracc_read_mem16(ejtag_info, addr, count, (uint16_t*)buf);
281 case 4:
282 if (count == 1)
283 return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t*)buf);
284 else
285 return mips32_pracc_read_mem32(ejtag_info, addr, count, (uint32_t*)buf);
286 }
287
288 return ERROR_OK;
289 }
290
291 int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
292 {
293 uint32_t code[] = {
294 /* start: */
295 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
296 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
297 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
298 MIPS32_SW(8,0,15), /* sw $8,($15) */
299 MIPS32_SW(9,0,15), /* sw $9,($15) */
300 MIPS32_SW(10,0,15), /* sw $10,($15) */
301 MIPS32_SW(11,0,15), /* sw $11,($15) */
302
303 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
304 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
305 MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */
306 MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */
307 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */
308 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
309 MIPS32_NOP,
310 /* loop: */
311 MIPS32_BEQ(0,10,9), /* beq 0, $10, end */
312 MIPS32_NOP,
313
314 MIPS32_LW(8,0,9), /* lw $8,0($9), Load $8 with the word @mem[$9] */
315 MIPS32_SW(8,0,11), /* sw $8,0($11) */
316
317 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
318 MIPS32_ADDI(9,9,4), /* $1 += 4 */
319 MIPS32_ADDI(11,11,4), /* $11 += 4 */
320
321 MIPS32_NOP,
322 MIPS32_B(NEG16(9)), /* b loop */
323 MIPS32_NOP,
324 /* end: */
325 MIPS32_LW(11,0,15), /* lw $11,($15) */
326 MIPS32_LW(10,0,15), /* lw $10,($15) */
327 MIPS32_LW(9,0,15), /* lw $9,($15) */
328 MIPS32_LW(8,0,15), /* lw $8,($15) */
329 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
330 MIPS32_NOP,
331 MIPS32_B(NEG16(31)), /* b start */
332 MIPS32_NOP,
333 };
334
335 int retval = ERROR_OK;
336 int blocksize;
337 int bytesread;
338 uint32_t param_in[2];
339
340 bytesread = 0;
341
342 while (count > 0)
343 {
344 blocksize = count;
345 if (count > 0x400)
346 blocksize = 0x400;
347
348 param_in[0] = addr;
349 param_in[1] = blocksize;
350
351 if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code,
352 sizeof(param_in)/sizeof(param_in[0]), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK)
353 {
354 return retval;
355 }
356
357 count -= blocksize;
358 addr += blocksize;
359 bytesread += blocksize;
360 }
361
362 return retval;
363 }
364
365 int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
366 {
367 uint32_t code[] = {
368 /* start: */
369 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
370 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
371 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
372 MIPS32_SW(8,0,15), /* sw $8,($15) */
373
374 MIPS32_LW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), //load R8 @ param_in[0] = address
375
376 MIPS32_LW(8,0,8), /* lw $8,0($8), Load $8 with the word @mem[$8] */
377 MIPS32_SW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_OUT),15), /* sw $8,0($9) */
378
379 MIPS32_LW(8,0,15), /* lw $8,($15) */
380 MIPS32_B(NEG16(9)), //was 17 /* b start */
381 MIPS32_MFC0(15,31,0), //this instruction will be executed (MIPS executes instruction after jump) /* move COP0 DeSave to $15 */
382 MIPS32_NOP,
383 };
384
385 int retval = ERROR_OK;
386 uint32_t param_in[1];
387
388 param_in[0] = addr;
389
390 if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code,
391 sizeof(param_in)/sizeof(param_in[0]), param_in, sizeof(uint32_t), buf, 1)) != ERROR_OK)
392 {
393 return retval;
394 }
395
396 return retval;
397 }
398
399 int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
400 {
401 uint32_t code[] = {
402 /* start: */
403 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
404 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
405 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
406 MIPS32_SW(8,0,15), /* sw $8,($15) */
407 MIPS32_SW(9,0,15), /* sw $9,($15) */
408 MIPS32_SW(10,0,15), /* sw $10,($15) */
409 MIPS32_SW(11,0,15), /* sw $11,($15) */
410
411 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
412 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
413 MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */
414 MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */
415 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */
416 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
417 MIPS32_NOP,
418 /* loop: */
419 MIPS32_BEQ(0,10,9), /* beq 0, $10, end */
420 MIPS32_NOP,
421
422 MIPS32_LHU(8,0,9), /* lw $8,0($9), Load $8 with the halfword @mem[$9] */
423 MIPS32_SW(8,0,11), /* sw $8,0($11) */
424
425 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
426 MIPS32_ADDI(9,9,2), /* $9 += 2 */
427 MIPS32_ADDI(11,11,4), /* $11 += 4 */
428 MIPS32_NOP,
429 MIPS32_B(NEG16(9)), /* b loop */
430 MIPS32_NOP,
431
432 MIPS32_LW(11,0,15), /* lw $11,($15) */
433 MIPS32_LW(10,0,15), /* lw $10,($15) */
434 MIPS32_LW(9,0,15), /* lw $9,($15) */
435 MIPS32_LW(8,0,15), /* lw $8,($15) */
436 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
437 MIPS32_NOP,
438 MIPS32_B(NEG16(31)), /* b start */
439 MIPS32_NOP,
440 };
441
442 // /* TODO remove array */
443 uint32_t param_out[count];
444 int i;
445
446 // int retval;
447 int blocksize;
448 int bytesread;
449 uint32_t param_in[2];
450
451 bytesread = 0;
452
453 //while (count > 0)
454 {
455 blocksize = count;
456 if (count > 0x400)
457 blocksize = 0x400;
458
459 param_in[0] = addr;
460 param_in[1] = blocksize;
461
462 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
463 sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
464
465 // count -= blocksize;
466 // addr += blocksize;
467 // bytesread += blocksize;
468 }
469
470 for (i = 0; i < count; i++)
471 {
472 buf[i] = param_out[i];
473 }
474
475 return ERROR_OK;
476 }
477
478 int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
479 {
480 uint32_t code[] = {
481 /* start: */
482 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
483 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
484 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
485 MIPS32_SW(8,0,15), /* sw $8,($15) */
486 MIPS32_SW(9,0,15), /* sw $9,($15) */
487 MIPS32_SW(10,0,15), /* sw $10,($15) */
488 MIPS32_SW(11,0,15), /* sw $11,($15) */
489
490 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
491 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
492 MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */
493 MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */
494 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */
495 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
496 MIPS32_NOP,
497 /* loop: */
498 MIPS32_BEQ(0,10,9), /* beq 0, $10, end */
499 MIPS32_NOP,
500
501 MIPS32_LBU(8,0,9), /* lw $8,0($9), Load t4 with the byte @mem[t1] */
502 MIPS32_SW(8,0,11), /* sw $8,0($11) */
503
504 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
505 MIPS32_ADDI(9,9,1), /* $9 += 1 */
506 MIPS32_ADDI(11,11,4), /* $11 += 4 */
507 MIPS32_NOP,
508 MIPS32_B(NEG16(9)), /* b loop */
509 MIPS32_NOP,
510 /* end: */
511 MIPS32_LW(11,0,15), /* lw $11,($15) */
512 MIPS32_LW(10,0,15), /* lw $10,($15) */
513 MIPS32_LW(9,0,15), /* lw $9,($15) */
514 MIPS32_LW(8,0,15), /* lw $8,($15) */
515 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
516 MIPS32_NOP,
517 MIPS32_B(NEG16(31)), /* b start */
518 MIPS32_NOP,
519 };
520
521 // /* TODO remove array */
522 uint32_t param_out[count];
523 int i;
524
525 // int retval;
526 int blocksize;
527 int bytesread;
528 uint32_t param_in[2];
529
530 bytesread = 0;
531
532 // while (count > 0)
533 {
534 blocksize = count;
535 if (count > 0x400)
536 blocksize = 0x400;
537
538 param_in[0] = addr;
539 param_in[1] = blocksize;
540
541 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
542 sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
543
544 // count -= blocksize;
545 // addr += blocksize;
546 // bytesread += blocksize;
547 }
548
549 for (i = 0; i < count; i++)
550 {
551 buf[i] = param_out[i];
552 }
553
554 return ERROR_OK;
555 }
556
557 int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
558 {
559 switch (size)
560 {
561 case 1:
562 return mips32_pracc_write_mem8(ejtag_info, addr, count, (uint8_t*)buf);
563 case 2:
564 return mips32_pracc_write_mem16(ejtag_info, addr, count,(uint16_t*)buf);
565 case 4:
566 if (count == 1)
567 return mips32_pracc_write_u32(ejtag_info, addr, (uint32_t*)buf);
568 else
569 return mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t*)buf);
570 }
571
572 return ERROR_OK;
573 }
574
575 int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
576 {
577
578 //NC: use destination pointer as loop counter (last address is in $10)
579 uint32_t code[] = {
580 /* start: */
581 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
582 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
583 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
584 MIPS32_SW(8,0,15), /* sw $8,($15) */
585 MIPS32_SW(9,0,15), /* sw $9,($15) */
586 MIPS32_SW(10,0,15), /* sw $10,($15) */
587 MIPS32_SW(11,0,15), /* sw $11,($15) */
588
589 MIPS32_ADDI(8,15,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)), //$8= MIPS32_PRACC_PARAM_IN
590 MIPS32_LW(9,0,8), /* Load write addr to $9 */
591 MIPS32_LW(10,4,8), //last address /* Load write count to $10 */
592 MIPS32_ADDI(8,8,8), // $8 += 8 beginning of data
593
594 //loop:
595 MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
596 MIPS32_SW(11,0,9), /* sw $11,0($9) */
597
598 MIPS32_ADDI(9,9,4), /* $9 += 4 */
599 MIPS32_BNE(10,9,NEG16(4)), //was 9 BNE $10, 9, loop /* b loop */
600 MIPS32_ADDI(8,8,4), //this instruction is part of the loop (one delay slot)! /* $8 += 4 */
601 /* end: */
602 MIPS32_LW(11,0,15), /* lw $11,($15) */
603 MIPS32_LW(10,0,15), /* lw $10,($15) */
604 MIPS32_LW(9,0,15), /* lw $9,($15) */
605 MIPS32_LW(8,0,15), /* lw $8,($15) */
606 MIPS32_B(NEG16(21)), //was 30 /* b start */
607 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
608 MIPS32_NOP, //this one will not be executed
609 };
610
611 /* TODO remove array */
612 uint32_t param_in[count + 2];
613 param_in[0] = addr;
614 param_in[1] = addr + count * sizeof(uint32_t); //last address
615
616 memcpy(&param_in[2], buf, count * sizeof(uint32_t));
617
618 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
619 sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1);
620
621 return ERROR_OK;
622 }
623
624 int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
625 {
626 uint32_t code[] = {
627 /* start: */
628 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
629 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
630 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
631 MIPS32_SW(8,0,15), /* sw $8,($15) */
632 MIPS32_SW(9,0,15), /* sw $9,($15) */
633
634 MIPS32_LW(8,NEG16((MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)-4), 15), //load R8 @ param_in[1] = data
635 MIPS32_LW(9,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), //load R9 @ param_in[0] = address
636
637 MIPS32_SW(8,0,9), /* sw $8,0($9) */
638
639 MIPS32_LW(9,0,15), /* lw $9,($15) */
640 MIPS32_LW(8,0,15), /* lw $8,($15) */
641 MIPS32_B(NEG16(11)), /* b start */
642 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
643 MIPS32_NOP,
644 };
645
646 /* TODO remove array */
647 uint32_t param_in[1 + 1];
648 param_in[0] = addr;
649 param_in[1] = *buf;
650
651 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
652 sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1);
653
654 return ERROR_OK;
655 }
656
657 int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
658 {
659 uint32_t code[] = {
660 /* start: */
661 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
662 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
663 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
664 MIPS32_SW(8,0,15), /* sw $8,($15) */
665 MIPS32_SW(9,0,15), /* sw $9,($15) */
666 MIPS32_SW(10,0,15), /* sw $10,($15) */
667 MIPS32_SW(11,0,15), /* sw $11,($15) */
668
669 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
670 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
671 MIPS32_LW(9,0,8), /* Load write addr to $9 */
672 MIPS32_LW(10,4,8), /* Load write count to $10 */
673 MIPS32_ADDI(8,8,8), /* $8 += 8 */
674 MIPS32_NOP,
675 /* loop: */
676 MIPS32_BEQ(0,10,9), /* beq $0, $10, end */
677 MIPS32_NOP,
678
679 MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
680 MIPS32_SH(11,0,9), /* sh $11,0($9) */
681
682 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
683 MIPS32_ADDI(9,9,2), /* $9 += 2 */
684 MIPS32_ADDI(8,8,4), /* $8 += 4 */
685
686 MIPS32_NOP,
687 MIPS32_B(NEG16(9)), /* b loop */
688 MIPS32_NOP,
689 /* end: */
690 MIPS32_LW(11,0,15), /* lw $11,($15) */
691 MIPS32_LW(10,0,15), /* lw $10,($15) */
692 MIPS32_LW(9,0,15), /* lw $9,($15) */
693 MIPS32_LW(8,0,15), /* lw $8,($15) */
694 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
695 MIPS32_NOP,
696 MIPS32_B(NEG16(30)), /* b start */
697 MIPS32_NOP,
698 };
699
700 /* TODO remove array */
701 uint32_t param_in[count + 2];
702 int i;
703 param_in[0] = addr;
704 param_in[1] = count;
705
706 for (i = 0; i < count; i++)
707 {
708 param_in[i + 2] = buf[i];
709 }
710
711 mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
712 sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
713
714 return ERROR_OK;
715 }
716
717 int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
718 {
719 uint32_t code[] = {
720 /* start: */
721 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
722 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
723 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
724 MIPS32_SW(8,0,15), /* sw $8,($15) */
725 MIPS32_SW(9,0,15), /* sw $9,($15) */
726 MIPS32_SW(10,0,15), /* sw $10,($15) */
727 MIPS32_SW(11,0,15), /* sw $11,($15) */
728
729 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
730 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
731 MIPS32_LW(9,0,8), /* Load write addr to $9 */
732 MIPS32_LW(10,4,8), /* Load write count to $10 */
733 MIPS32_ADDI(8,8,8), /* $8 += 8 */
734 MIPS32_NOP,
735 /* loop: */
736 MIPS32_BEQ(0,10,9), /* beq $0, $10, end */
737 MIPS32_NOP,
738
739 MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
740 MIPS32_SB(11,0,9), /* sb $11,0($9) */
741
742 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
743 MIPS32_ADDI(9,9,1), /* $9 += 1 */
744 MIPS32_ADDI(8,8,4), /* $8 += 4 */
745
746 MIPS32_NOP,
747 MIPS32_B(NEG16(9)), /* b loop */
748 MIPS32_NOP,
749 /* end: */
750 MIPS32_LW(11,0,15), /* lw $11,($15) */
751 MIPS32_LW(10,0,15), /* lw $10,($15) */
752 MIPS32_LW(9,0,15), /* lw $9,($15) */
753 MIPS32_LW(8,0,15), /* lw $8,($15) */
754 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
755 MIPS32_NOP,
756 MIPS32_B(NEG16(30)), /* b start */
757 MIPS32_NOP,
758 };
759
760 /* TODO remove array */
761 uint32_t param_in[count + 2];
762 int retval;
763 int i;
764 param_in[0] = addr;
765 param_in[1] = count;
766
767 for (i = 0; i < count; i++)
768 {
769 param_in[i + 2] = buf[i];
770 }
771
772 retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
773 sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
774
775 return retval;
776 }
777
778 int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
779 {
780 uint32_t code[] = {
781 /* start: */
782 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $2 = MIPS32_PRACC_PARAM_IN */
783 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_IN)),
784 MIPS32_LW(1,1*4,2), /* lw $1,1*4($2) */
785 MIPS32_LW(15,15*4,2), /* lw $15,15*4($2) */
786 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
787 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
788 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
789 MIPS32_SW(1,0,15), /* sw $1,($15) */
790 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $1 = MIPS32_PRACC_PARAM_IN */
791 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_IN)),
792 MIPS32_LW(3,3*4,1), /* lw $3,3*4($1) */
793 MIPS32_LW(4,4*4,1), /* lw $4,4*4($1) */
794 MIPS32_LW(5,5*4,1), /* lw $5,5*4($1) */
795 MIPS32_LW(6,6*4,1), /* lw $6,6*4($1) */
796 MIPS32_LW(7,7*4,1), /* lw $7,7*4($1) */
797 MIPS32_LW(8,8*4,1), /* lw $8,8*4($1) */
798 MIPS32_LW(9,9*4,1), /* lw $9,9*4($1) */
799 MIPS32_LW(10,10*4,1), /* lw $10,10*4($1) */
800 MIPS32_LW(11,11*4,1), /* lw $11,11*4($1) */
801 MIPS32_LW(12,12*4,1), /* lw $12,12*4($1) */
802 MIPS32_LW(13,13*4,1), /* lw $13,13*4($1) */
803 MIPS32_LW(14,14*4,1), /* lw $14,14*4($1) */
804 MIPS32_LW(16,16*4,1), /* lw $16,16*4($1) */
805 MIPS32_LW(17,17*4,1), /* lw $17,17*4($1) */
806 MIPS32_LW(18,18*4,1), /* lw $18,18*4($1) */
807 MIPS32_LW(19,19*4,1), /* lw $19,19*4($1) */
808 MIPS32_LW(20,20*4,1), /* lw $20,20*4($1) */
809 MIPS32_LW(21,21*4,1), /* lw $21,21*4($1) */
810 MIPS32_LW(22,22*4,1), /* lw $22,22*4($1) */
811 MIPS32_LW(23,23*4,1), /* lw $23,23*4($1) */
812 MIPS32_LW(24,24*4,1), /* lw $24,24*4($1) */
813 MIPS32_LW(25,25*4,1), /* lw $25,25*4($1) */
814 MIPS32_LW(26,26*4,1), /* lw $26,26*4($1) */
815 MIPS32_LW(27,27*4,1), /* lw $27,27*4($1) */
816 MIPS32_LW(28,28*4,1), /* lw $28,28*4($1) */
817 MIPS32_LW(29,29*4,1), /* lw $29,29*4($1) */
818 MIPS32_LW(30,30*4,1), /* lw $30,30*4($1) */
819 MIPS32_LW(31,31*4,1), /* lw $31,31*4($1) */
820
821 MIPS32_LW(2,32*4,1), /* lw $2,32*4($1) */
822 MIPS32_MTC0(2,12,0), /* move $2 to status */
823 MIPS32_LW(2,33*4,1), /* lw $2,33*4($1) */
824 MIPS32_MTLO(2), /* move $2 to lo */
825 MIPS32_LW(2,34*4,1), /* lw $2,34*4($1) */
826 MIPS32_MTHI(2), /* move $2 to hi */
827 MIPS32_LW(2,35*4,1), /* lw $2,35*4($1) */
828 MIPS32_MTC0(2,8,0), /* move $2 to badvaddr */
829 MIPS32_LW(2,36*4,1), /* lw $2,36*4($1) */
830 MIPS32_MTC0(2,13,0), /* move $2 to cause*/
831 MIPS32_LW(2,37*4,1), /* lw $2,37*4($1) */
832 MIPS32_MTC0(2,24,0), /* move $2 to pc */
833
834 MIPS32_LW(2,2*4,1), /* lw $2,2*4($1) */
835 MIPS32_LW(1,0,15), /* lw $1,($15) */
836 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
837 MIPS32_NOP,
838 MIPS32_B(NEG16(55)), /* b start */
839 MIPS32_NOP,
840 };
841
842 int retval;
843
844 retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
845 38, regs, 0, NULL, 1);
846
847 return retval;
848 }
849
850 int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
851 {
852 uint32_t code[] = {
853 /* start: */
854 MIPS32_MTC0(2,31,0), /* move $2 to COP0 DeSave */
855 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $2 = MIPS32_PRACC_PARAM_OUT */
856 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)),
857 MIPS32_SW(0,0*4,2), /* sw $0,0*4($2) */
858 MIPS32_SW(1,1*4,2), /* sw $1,1*4($2) */
859 MIPS32_SW(15,15*4,2), /* sw $15,15*4($2) */
860 MIPS32_MFC0(2,31,0), /* move COP0 DeSave to $2 */
861 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
862 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
863 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
864 MIPS32_SW(1,0,15), /* sw $1,($15) */
865 MIPS32_SW(2,0,15), /* sw $2,($15) */
866 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $1 = MIPS32_PRACC_PARAM_OUT */
867 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)),
868 MIPS32_SW(2,2*4,1), /* sw $2,2*4($1) */
869 MIPS32_SW(3,3*4,1), /* sw $3,3*4($1) */
870 MIPS32_SW(4,4*4,1), /* sw $4,4*4($1) */
871 MIPS32_SW(5,5*4,1), /* sw $5,5*4($1) */
872 MIPS32_SW(6,6*4,1), /* sw $6,6*4($1) */
873 MIPS32_SW(7,7*4,1), /* sw $7,7*4($1) */
874 MIPS32_SW(8,8*4,1), /* sw $8,8*4($1) */
875 MIPS32_SW(9,9*4,1), /* sw $9,9*4($1) */
876 MIPS32_SW(10,10*4,1), /* sw $10,10*4($1) */
877 MIPS32_SW(11,11*4,1), /* sw $11,11*4($1) */
878 MIPS32_SW(12,12*4,1), /* sw $12,12*4($1) */
879 MIPS32_SW(13,13*4,1), /* sw $13,13*4($1) */
880 MIPS32_SW(14,14*4,1), /* sw $14,14*4($1) */
881 MIPS32_SW(16,16*4,1), /* sw $16,16*4($1) */
882 MIPS32_SW(17,17*4,1), /* sw $17,17*4($1) */
883 MIPS32_SW(18,18*4,1), /* sw $18,18*4($1) */
884 MIPS32_SW(19,19*4,1), /* sw $19,19*4($1) */
885 MIPS32_SW(20,20*4,1), /* sw $20,20*4($1) */
886 MIPS32_SW(21,21*4,1), /* sw $21,21*4($1) */
887 MIPS32_SW(22,22*4,1), /* sw $22,22*4($1) */
888 MIPS32_SW(23,23*4,1), /* sw $23,23*4($1) */
889 MIPS32_SW(24,24*4,1), /* sw $24,24*4($1) */
890 MIPS32_SW(25,25*4,1), /* sw $25,25*4($1) */
891 MIPS32_SW(26,26*4,1), /* sw $26,26*4($1) */
892 MIPS32_SW(27,27*4,1), /* sw $27,27*4($1) */
893 MIPS32_SW(28,28*4,1), /* sw $28,28*4($1) */
894 MIPS32_SW(29,29*4,1), /* sw $29,29*4($1) */
895 MIPS32_SW(30,30*4,1), /* sw $30,30*4($1) */
896 MIPS32_SW(31,31*4,1), /* sw $31,31*4($1) */
897
898 MIPS32_MFC0(2,12,0), /* move status to $2 */
899 MIPS32_SW(2,32*4,1), /* sw $2,32*4($1) */
900 MIPS32_MFLO(2), /* move lo to $2 */
901 MIPS32_SW(2,33*4,1), /* sw $2,33*4($1) */
902 MIPS32_MFHI(2), /* move hi to $2 */
903 MIPS32_SW(2,34*4,1), /* sw $2,34*4($1) */
904 MIPS32_MFC0(2,8,0), /* move badvaddr to $2 */
905 MIPS32_SW(2,35*4,1), /* sw $2,35*4($1) */
906 MIPS32_MFC0(2,13,0), /* move cause to $2 */
907 MIPS32_SW(2,36*4,1), /* sw $2,36*4($1) */
908 MIPS32_MFC0(2,24,0), /* move pc to $2 */
909 MIPS32_SW(2,37*4,1), /* sw $2,37*4($1) */
910
911 MIPS32_LW(2,0,15), /* lw $2,($15) */
912 MIPS32_LW(1,0,15), /* lw $1,($15) */
913 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
914 MIPS32_NOP,
915 MIPS32_B(NEG16(60)), /* b start */
916 MIPS32_NOP,
917 };
918
919 int retval;
920
921 retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
922 0, NULL, 38, regs, 1);
923
924 return retval;
925 }
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