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error number: review
[openocd.git] / src / target / mips32_pracc.c
blob236f389466a44811c48e14968a9387f6959b4011
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 * Copyright (C) 2009 by David N. Claffey <dnclaffey@gmail.com> *
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 * This program is distributed in the hope that it will be useful, *
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17 * GNU General Public License for more details. *
18 * *
19 * You should have received a copy of the GNU General Public License *
20 * along with this program; if not, write to the *
21 * Free Software Foundation, Inc., *
22 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
23 ***************************************************************************/
24
25 /*
26 This version has optimized assembly routines for 32 bit operations:
27 - read word
28 - write word
29 - write array of words
30
31 One thing to be aware of is that the MIPS32 cpu will execute the
32 instruction after a branch instruction (one delay slot).
33
34 For example:
35
36 LW $2, ($5 +10)
37 B foo
38 LW $1, ($2 +100)
39
40 The LW $1, ($2 +100) instruction is also executed. If this is
41 not wanted a NOP can be inserted:
42
43 LW $2, ($5 +10)
44 B foo
45 NOP
46 LW $1, ($2 +100)
47
48 or the code can be changed to:
49
50 B foo
51 LW $2, ($5 +10)
52 LW $1, ($2 +100)
53
54 The original code contained NOPs. I have removed these and moved
55 the branches.
56
57 I also moved the PRACC_STACK to 0xFF204000. This allows
58 the use of 16 bits offsets to get pointers to the input
59 and output area relative to the stack. Note that the stack
60 isn't really a stack (the stack pointer is not 'moving')
61 but a FIFO simulated in software.
62
63 These changes result in a 35% speed increase when programming an
64 external flash.
65
66 More improvement could be gained if the registers do no need
67 to be preserved but in that case the routines should be aware
68 OpenOCD is used as a flash programmer or as a debug tool.
69
70 Nico Coesel
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 const 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 mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info,
94 uint32_t addr, int count, uint8_t *buf);
95 static int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info,
96 uint32_t addr, int count, uint16_t *buf);
97 static int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info,
98 uint32_t addr, int count, uint32_t *buf);
99 static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info,
100 uint32_t addr, uint32_t *buf);
101
102 static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info,
103 uint32_t addr, int count, uint8_t *buf);
104 static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info,
105 uint32_t addr, int count, uint16_t *buf);
106 static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info,
107 uint32_t addr, int count, uint32_t *buf);
108 static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info,
109 uint32_t addr, uint32_t *buf);
110
111 static int wait_for_pracc_rw(struct mips_ejtag *ejtag_info, uint32_t *ctrl)
112 {
113 uint32_t ejtag_ctrl;
114
115 while (1)
116 {
117 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
118 ejtag_ctrl = ejtag_info->ejtag_ctrl;
119 mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
120 if (ejtag_ctrl & EJTAG_CTRL_PRACC)
121 break;
122 LOG_DEBUG("DEBUGMODULE: No memory access in progress!\n");
123 return ERROR_JTAG_DEVICE_ERROR;
124 }
125
126 *ctrl = ejtag_ctrl;
127 return ERROR_OK;
128 }
129
130 static int mips32_pracc_exec_read(struct mips32_pracc_context *ctx, uint32_t address)
131 {
132 struct mips_ejtag *ejtag_info = ctx->ejtag_info;
133 int offset;
134 uint32_t ejtag_ctrl, data;
135
136 if ((address >= MIPS32_PRACC_PARAM_IN)
137 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
138 {
139 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
140 data = ctx->local_iparam[offset];
141 }
142 else if ((address >= MIPS32_PRACC_PARAM_OUT)
143 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
144 {
145 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
146 data = ctx->local_oparam[offset];
147 }
148 else if ((address >= MIPS32_PRACC_TEXT)
149 && (address <= MIPS32_PRACC_TEXT + ctx->code_len * 4))
150 {
151 offset = (address - MIPS32_PRACC_TEXT) / 4;
152 data = ctx->code[offset];
153 }
154 else if (address == MIPS32_PRACC_STACK)
155 {
156 /* save to our debug stack */
157 data = ctx->stack[--ctx->stack_offset];
158 }
159 else
160 {
161 /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back
162 * to start of debug vector */
163
164 data = 0;
165 LOG_ERROR("Error reading unexpected address 0x%8.8" PRIx32 "", address);
166 return ERROR_JTAG_DEVICE_ERROR;
167 }
168
169 /* Send the data out */
170 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA);
171 mips_ejtag_drscan_32(ctx->ejtag_info, &data);
172
173 /* Clear the access pending bit (let the processor eat!) */
174 ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
175 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL);
176 mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
177
178 jtag_add_clocks(5);
179 jtag_execute_queue();
180
181 return ERROR_OK;
182 }
183
184 static int mips32_pracc_exec_write(struct mips32_pracc_context *ctx, uint32_t address)
185 {
186 uint32_t ejtag_ctrl,data;
187 int offset;
188 struct mips_ejtag *ejtag_info = ctx->ejtag_info;
189
190 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA);
191 mips_ejtag_drscan_32(ctx->ejtag_info, &data);
192
193 /* Clear access pending bit */
194 ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
195 mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL);
196 mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
197
198 jtag_add_clocks(5);
199 jtag_execute_queue();
200
201 if ((address >= MIPS32_PRACC_PARAM_IN)
202 && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4))
203 {
204 offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
205 ctx->local_iparam[offset] = data;
206 }
207 else if ((address >= MIPS32_PRACC_PARAM_OUT)
208 && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
209 {
210 offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
211 ctx->local_oparam[offset] = data;
212 }
213 else if (address == MIPS32_PRACC_STACK)
214 {
215 /* save data onto our stack */
216 ctx->stack[ctx->stack_offset++] = data;
217 }
218 else
219 {
220 LOG_ERROR("Error writing unexpected address 0x%8.8" PRIx32 "", address);
221 return ERROR_JTAG_DEVICE_ERROR;
222 }
223
224 return ERROR_OK;
225 }
226
227 int mips32_pracc_exec(struct mips_ejtag *ejtag_info, int code_len, const uint32_t *code,
228 int num_param_in, uint32_t *param_in, int num_param_out, uint32_t *param_out, int cycle)
229 {
230 uint32_t ejtag_ctrl;
231 uint32_t address, data;
232 struct mips32_pracc_context ctx;
233 int retval;
234 int pass = 0;
235
236 ctx.local_iparam = param_in;
237 ctx.local_oparam = param_out;
238 ctx.num_iparam = num_param_in;
239 ctx.num_oparam = num_param_out;
240 ctx.code = code;
241 ctx.code_len = code_len;
242 ctx.ejtag_info = ejtag_info;
243 ctx.stack_offset = 0;
244
245 while (1)
246 {
247 if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
248 return retval;
249
250 address = data = 0;
251 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS);
252 mips_ejtag_drscan_32(ejtag_info, &address);
253
254 /* Check for read or write */
255 if (ejtag_ctrl & EJTAG_CTRL_PRNW)
256 {
257 if ((retval = mips32_pracc_exec_write(&ctx, address)) != ERROR_OK)
258 return retval;
259 }
260 else
261 {
262 /* Check to see if its reading at the debug vector. The first pass through
263 * the module is always read at the vector, so the first one we allow. When
264 * the second read from the vector occurs we are done and just exit. */
265 if ((address == MIPS32_PRACC_TEXT) && (pass++))
266 {
267 break;
268 }
269
270 if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK)
271 return retval;
272 }
273
274 if (cycle == 0)
275 break;
276 }
277
278 /* stack sanity check */
279 if (ctx.stack_offset != 0)
280 {
281 LOG_DEBUG("Pracc Stack not zero");
282 }
283
284 return ERROR_OK;
285 }
286
287 int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
288 {
289 switch (size)
290 {
291 case 1:
292 return mips32_pracc_read_mem8(ejtag_info, addr, count, (uint8_t*)buf);
293 case 2:
294 return mips32_pracc_read_mem16(ejtag_info, addr, count, (uint16_t*)buf);
295 case 4:
296 if (count == 1)
297 return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t*)buf);
298 else
299 return mips32_pracc_read_mem32(ejtag_info, addr, count, (uint32_t*)buf);
300 }
301
302 return ERROR_OK;
303 }
304
305 static int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
306 {
307 static const uint32_t code[] = {
308 /* start: */
309 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
310 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
311 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
312 MIPS32_SW(8,0,15), /* sw $8,($15) */
313 MIPS32_SW(9,0,15), /* sw $9,($15) */
314 MIPS32_SW(10,0,15), /* sw $10,($15) */
315 MIPS32_SW(11,0,15), /* sw $11,($15) */
316
317 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
318 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
319 MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */
320 MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */
321 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */
322 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
323 /* loop: */
324 MIPS32_BEQ(0,10,8), /* beq 0, $10, end */
325 MIPS32_NOP,
326
327 MIPS32_LW(8,0,9), /* lw $8,0($9), Load $8 with the word @mem[$9] */
328 MIPS32_SW(8,0,11), /* sw $8,0($11) */
329
330 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
331 MIPS32_ADDI(9,9,4), /* $1 += 4 */
332 MIPS32_ADDI(11,11,4), /* $11 += 4 */
333
334 MIPS32_B(NEG16(8)), /* b loop */
335 MIPS32_NOP,
336 /* end: */
337 MIPS32_LW(11,0,15), /* lw $11,($15) */
338 MIPS32_LW(10,0,15), /* lw $10,($15) */
339 MIPS32_LW(9,0,15), /* lw $9,($15) */
340 MIPS32_LW(8,0,15), /* lw $8,($15) */
341 MIPS32_B(NEG16(27)), /* b start */
342 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
343 };
344
345 int retval = ERROR_OK;
346 int blocksize;
347 int bytesread;
348 uint32_t param_in[2];
349
350 bytesread = 0;
351
352 while (count > 0)
353 {
354 blocksize = count;
355 if (count > 0x400)
356 blocksize = 0x400;
357
358 param_in[0] = addr;
359 param_in[1] = blocksize;
360
361 if ((retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
362 ARRAY_SIZE(param_in), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK)
363 {
364 return retval;
365 }
366
367 count -= blocksize;
368 addr += blocksize;
369 bytesread += blocksize;
370 }
371
372 return retval;
373 }
374
375 static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
376 {
377 static const uint32_t code[] = {
378 /* start: */
379 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
380 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
381 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
382 MIPS32_SW(8,0,15), /* sw $8,($15) */
383
384 MIPS32_LW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN),15), /* load R8 @ param_in[0] = address */
385
386 MIPS32_LW(8,0,8), /* lw $8,0($8), Load $8 with the word @mem[$8] */
387 MIPS32_SW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_OUT),15), /* store R8 @ param_out[0] */
388
389 MIPS32_LW(8,0,15), /* lw $8,($15) */
390 MIPS32_B(NEG16(9)), /* b start */
391 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
392 };
393
394 int retval = ERROR_OK;
395 uint32_t param_in[1];
396
397 param_in[0] = addr;
398
399 if ((retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
400 ARRAY_SIZE(param_in), param_in, 1, buf, 1)) != ERROR_OK)
401 {
402 return retval;
403 }
404
405 return retval;
406 }
407
408 static int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
409 {
410 static const uint32_t code[] = {
411 /* start: */
412 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
413 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
414 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
415 MIPS32_SW(8,0,15), /* sw $8,($15) */
416 MIPS32_SW(9,0,15), /* sw $9,($15) */
417 MIPS32_SW(10,0,15), /* sw $10,($15) */
418 MIPS32_SW(11,0,15), /* sw $11,($15) */
419
420 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
421 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
422 MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */
423 MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */
424 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */
425 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
426 /* loop: */
427 MIPS32_BEQ(0,10,8), /* beq 0, $10, end */
428 MIPS32_NOP,
429
430 MIPS32_LHU(8,0,9), /* lw $8,0($9), Load $8 with the halfword @mem[$9] */
431 MIPS32_SW(8,0,11), /* sw $8,0($11) */
432
433 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
434 MIPS32_ADDI(9,9,2), /* $9 += 2 */
435 MIPS32_ADDI(11,11,4), /* $11 += 4 */
436 MIPS32_B(NEG16(8)), /* b loop */
437 MIPS32_NOP,
438 /* end: */
439 MIPS32_LW(11,0,15), /* lw $11,($15) */
440 MIPS32_LW(10,0,15), /* lw $10,($15) */
441 MIPS32_LW(9,0,15), /* lw $9,($15) */
442 MIPS32_LW(8,0,15), /* lw $8,($15) */
443 MIPS32_B(NEG16(27)), /* b start */
444 MIPS32_MFC0(15,30,0), /* move COP0 DeSave to $15 */
445 };
446
447 /* TODO remove array */
448 uint32_t *param_out = malloc(count * sizeof(uint32_t));
449 int i;
450
451 // int retval;
452 int blocksize;
453 int bytesread;
454 uint32_t param_in[2];
455
456 bytesread = 0;
457
458 //while (count > 0)
459 {
460 blocksize = count;
461 if (count > 0x400)
462 blocksize = 0x400;
463
464 param_in[0] = addr;
465 param_in[1] = blocksize;
466
467 mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
468 ARRAY_SIZE(param_in), param_in, count, param_out, 1);
469
470 // count -= blocksize;
471 // addr += blocksize;
472 // bytesread += blocksize;
473 }
474
475 for (i = 0; i < count; i++)
476 {
477 buf[i] = param_out[i];
478 }
479
480 free(param_out);
481
482 return ERROR_OK;
483 }
484
485 static int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
486 {
487 static const uint32_t code[] = {
488 /* start: */
489 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
490 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
491 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
492 MIPS32_SW(8,0,15), /* sw $8,($15) */
493 MIPS32_SW(9,0,15), /* sw $9,($15) */
494 MIPS32_SW(10,0,15), /* sw $10,($15) */
495 MIPS32_SW(11,0,15), /* sw $11,($15) */
496
497 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
498 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
499 MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */
500 MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */
501 MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */
502 MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)),
503 /* loop: */
504 MIPS32_BEQ(0,10,8), /* beq 0, $10, end */
505 MIPS32_NOP,
506
507 MIPS32_LBU(8,0,9), /* lw $8,0($9), Load t4 with the byte @mem[t1] */
508 MIPS32_SW(8,0,11), /* sw $8,0($11) */
509
510 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
511 MIPS32_ADDI(9,9,1), /* $9 += 1 */
512 MIPS32_ADDI(11,11,4), /* $11 += 4 */
513 MIPS32_B(NEG16(8)), /* b loop */
514 MIPS32_NOP,
515 /* end: */
516 MIPS32_LW(11,0,15), /* lw $11,($15) */
517 MIPS32_LW(10,0,15), /* lw $10,($15) */
518 MIPS32_LW(9,0,15), /* lw $9,($15) */
519 MIPS32_LW(8,0,15), /* lw $8,($15) */
520 MIPS32_B(NEG16(27)), /* b start */
521 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
522 };
523
524 /* TODO remove array */
525 uint32_t *param_out = malloc(count * sizeof(uint32_t));
526 int i;
527
528 // int retval;
529 int blocksize;
530 int bytesread;
531 uint32_t param_in[2];
532
533 bytesread = 0;
534
535 // while (count > 0)
536 {
537 blocksize = count;
538 if (count > 0x400)
539 blocksize = 0x400;
540
541 param_in[0] = addr;
542 param_in[1] = blocksize;
543
544 mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
545 ARRAY_SIZE(param_in), param_in, count, param_out, 1);
546
547 // count -= blocksize;
548 // addr += blocksize;
549 // bytesread += blocksize;
550 }
551
552 for (i = 0; i < count; i++)
553 {
554 buf[i] = param_out[i];
555 }
556
557 free(param_out);
558
559 return ERROR_OK;
560 }
561
562 int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
563 {
564 switch (size)
565 {
566 case 1:
567 return mips32_pracc_write_mem8(ejtag_info, addr, count, (uint8_t*)buf);
568 case 2:
569 return mips32_pracc_write_mem16(ejtag_info, addr, count,(uint16_t*)buf);
570 case 4:
571 if (count == 1)
572 return mips32_pracc_write_u32(ejtag_info, addr, (uint32_t*)buf);
573 else
574 return mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t*)buf);
575 }
576
577 return ERROR_OK;
578 }
579
580 static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
581 {
582 static const uint32_t code[] = {
583 /* start: */
584 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
585 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
586 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
587 MIPS32_SW(8,0,15), /* sw $8,($15) */
588 MIPS32_SW(9,0,15), /* sw $9,($15) */
589 MIPS32_SW(10,0,15), /* sw $10,($15) */
590 MIPS32_SW(11,0,15), /* sw $11,($15) */
591
592 MIPS32_ADDI(8,15,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)), /* $8= MIPS32_PRACC_PARAM_IN */
593 MIPS32_LW(9,0,8), /* Load write addr to $9 */
594 MIPS32_LW(10,4,8), /* Load write count to $10 */
595 MIPS32_ADDI(8,8,8), /* $8 += 8 beginning of data */
596
597 /* loop: */
598 MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
599 MIPS32_SW(11,0,9), /* sw $11,0($9) */
600
601 MIPS32_ADDI(9,9,4), /* $9 += 4 */
602 MIPS32_BNE(10,9,NEG16(4)), /* bne $10, $9, loop */
603 MIPS32_ADDI(8,8,4), /* $8 += 4 */
604
605 /* end: */
606 MIPS32_LW(11,0,15), /* lw $11,($15) */
607 MIPS32_LW(10,0,15), /* lw $10,($15) */
608 MIPS32_LW(9,0,15), /* lw $9,($15) */
609 MIPS32_LW(8,0,15), /* lw $8,($15) */
610 MIPS32_B(NEG16(21)), /* b start */
611 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
612 };
613
614 /* TODO remove array */
615 uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
616 param_in[0] = addr;
617 param_in[1] = addr + (count * sizeof(uint32_t)); /* last address */
618
619 memcpy(&param_in[2], buf, count * sizeof(uint32_t));
620
621 mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
622 count + 2, param_in, 0, NULL, 1);
623
624 free(param_in);
625
626 return ERROR_OK;
627 }
628
629 static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
630 {
631 static const uint32_t code[] = {
632 /* start: */
633 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
634 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
635 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
636 MIPS32_SW(8,0,15), /* sw $8,($15) */
637 MIPS32_SW(9,0,15), /* sw $9,($15) */
638
639 MIPS32_LW(8,NEG16((MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)-4), 15), /* load R8 @ param_in[1] = data */
640 MIPS32_LW(9,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), /* load R9 @ param_in[0] = address */
641
642 MIPS32_SW(8,0,9), /* sw $8,0($9) */
643
644 MIPS32_LW(9,0,15), /* lw $9,($15) */
645 MIPS32_LW(8,0,15), /* lw $8,($15) */
646 MIPS32_B(NEG16(11)), /* b start */
647 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
648 };
649
650 /* TODO remove array */
651 uint32_t param_in[1 + 1];
652 param_in[0] = addr;
653 param_in[1] = *buf;
654
655 mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
656 ARRAY_SIZE(param_in), param_in, 0, NULL, 1);
657
658 return ERROR_OK;
659 }
660
661 static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
662 {
663 static const uint32_t code[] = {
664 /* start: */
665 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
666 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
667 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
668 MIPS32_SW(8,0,15), /* sw $8,($15) */
669 MIPS32_SW(9,0,15), /* sw $9,($15) */
670 MIPS32_SW(10,0,15), /* sw $10,($15) */
671 MIPS32_SW(11,0,15), /* sw $11,($15) */
672
673 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
674 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
675 MIPS32_LW(9,0,8), /* Load write addr to $9 */
676 MIPS32_LW(10,4,8), /* Load write count to $10 */
677 MIPS32_ADDI(8,8,8), /* $8 += 8 */
678 /* loop: */
679 MIPS32_BEQ(0,10,8), /* beq $0, $10, end */
680 MIPS32_NOP,
681
682 MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
683 MIPS32_SH(11,0,9), /* sh $11,0($9) */
684
685 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
686 MIPS32_ADDI(9,9,2), /* $9 += 2 */
687 MIPS32_ADDI(8,8,4), /* $8 += 4 */
688
689 MIPS32_B(NEG16(8)), /* b loop */
690 MIPS32_NOP,
691 /* end: */
692 MIPS32_LW(11,0,15), /* lw $11,($15) */
693 MIPS32_LW(10,0,15), /* lw $10,($15) */
694 MIPS32_LW(9,0,15), /* lw $9,($15) */
695 MIPS32_LW(8,0,15), /* lw $8,($15) */
696 MIPS32_B(NEG16(26)), /* b start */
697 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
698 };
699
700 /* TODO remove array */
701 uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
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, ARRAY_SIZE(code), code, \
712 count + 2, param_in, 0, NULL, 1);
713
714 free(param_in);
715
716 return ERROR_OK;
717 }
718
719 static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
720 {
721 static const uint32_t code[] = {
722 /* start: */
723 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
724 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
725 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
726 MIPS32_SW(8,0,15), /* sw $8,($15) */
727 MIPS32_SW(9,0,15), /* sw $9,($15) */
728 MIPS32_SW(10,0,15), /* sw $10,($15) */
729 MIPS32_SW(11,0,15), /* sw $11,($15) */
730
731 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
732 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
733 MIPS32_LW(9,0,8), /* Load write addr to $9 */
734 MIPS32_LW(10,4,8), /* Load write count to $10 */
735 MIPS32_ADDI(8,8,8), /* $8 += 8 */
736 /* loop: */
737 MIPS32_BEQ(0,10,8), /* beq $0, $10, end */
738 MIPS32_NOP,
739
740 MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
741 MIPS32_SB(11,0,9), /* sb $11,0($9) */
742
743 MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
744 MIPS32_ADDI(9,9,1), /* $9 += 1 */
745 MIPS32_ADDI(8,8,4), /* $8 += 4 */
746
747 MIPS32_B(NEG16(8)), /* 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_B(NEG16(26)), /* b start */
755 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
756 };
757
758 /* TODO remove array */
759 uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
760 int retval;
761 int i;
762 param_in[0] = addr;
763 param_in[1] = count;
764
765 for (i = 0; i < count; i++)
766 {
767 param_in[i + 2] = buf[i];
768 }
769
770 retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
771 count + 2, param_in, 0, NULL, 1);
772
773 free(param_in);
774
775 return retval;
776 }
777
778 int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
779 {
780 static const 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 depc (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_B(NEG16(53)), /* b start */
837 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
838 };
839
840 int retval;
841
842 retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
843 MIPS32NUMCOREREGS, regs, 0, NULL, 1);
844
845 return retval;
846 }
847
848 int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
849 {
850 static const uint32_t code[] = {
851 /* start: */
852 MIPS32_MTC0(2,31,0), /* move $2 to COP0 DeSave */
853 MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $2 = MIPS32_PRACC_PARAM_OUT */
854 MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)),
855 MIPS32_SW(0,0*4,2), /* sw $0,0*4($2) */
856 MIPS32_SW(1,1*4,2), /* sw $1,1*4($2) */
857 MIPS32_SW(15,15*4,2), /* sw $15,15*4($2) */
858 MIPS32_MFC0(2,31,0), /* move COP0 DeSave to $2 */
859 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
860 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
861 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
862 MIPS32_SW(1,0,15), /* sw $1,($15) */
863 MIPS32_SW(2,0,15), /* sw $2,($15) */
864 MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $1 = MIPS32_PRACC_PARAM_OUT */
865 MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)),
866 MIPS32_SW(2,2*4,1), /* sw $2,2*4($1) */
867 MIPS32_SW(3,3*4,1), /* sw $3,3*4($1) */
868 MIPS32_SW(4,4*4,1), /* sw $4,4*4($1) */
869 MIPS32_SW(5,5*4,1), /* sw $5,5*4($1) */
870 MIPS32_SW(6,6*4,1), /* sw $6,6*4($1) */
871 MIPS32_SW(7,7*4,1), /* sw $7,7*4($1) */
872 MIPS32_SW(8,8*4,1), /* sw $8,8*4($1) */
873 MIPS32_SW(9,9*4,1), /* sw $9,9*4($1) */
874 MIPS32_SW(10,10*4,1), /* sw $10,10*4($1) */
875 MIPS32_SW(11,11*4,1), /* sw $11,11*4($1) */
876 MIPS32_SW(12,12*4,1), /* sw $12,12*4($1) */
877 MIPS32_SW(13,13*4,1), /* sw $13,13*4($1) */
878 MIPS32_SW(14,14*4,1), /* sw $14,14*4($1) */
879 MIPS32_SW(16,16*4,1), /* sw $16,16*4($1) */
880 MIPS32_SW(17,17*4,1), /* sw $17,17*4($1) */
881 MIPS32_SW(18,18*4,1), /* sw $18,18*4($1) */
882 MIPS32_SW(19,19*4,1), /* sw $19,19*4($1) */
883 MIPS32_SW(20,20*4,1), /* sw $20,20*4($1) */
884 MIPS32_SW(21,21*4,1), /* sw $21,21*4($1) */
885 MIPS32_SW(22,22*4,1), /* sw $22,22*4($1) */
886 MIPS32_SW(23,23*4,1), /* sw $23,23*4($1) */
887 MIPS32_SW(24,24*4,1), /* sw $24,24*4($1) */
888 MIPS32_SW(25,25*4,1), /* sw $25,25*4($1) */
889 MIPS32_SW(26,26*4,1), /* sw $26,26*4($1) */
890 MIPS32_SW(27,27*4,1), /* sw $27,27*4($1) */
891 MIPS32_SW(28,28*4,1), /* sw $28,28*4($1) */
892 MIPS32_SW(29,29*4,1), /* sw $29,29*4($1) */
893 MIPS32_SW(30,30*4,1), /* sw $30,30*4($1) */
894 MIPS32_SW(31,31*4,1), /* sw $31,31*4($1) */
895
896 MIPS32_MFC0(2,12,0), /* move status to $2 */
897 MIPS32_SW(2,32*4,1), /* sw $2,32*4($1) */
898 MIPS32_MFLO(2), /* move lo to $2 */
899 MIPS32_SW(2,33*4,1), /* sw $2,33*4($1) */
900 MIPS32_MFHI(2), /* move hi to $2 */
901 MIPS32_SW(2,34*4,1), /* sw $2,34*4($1) */
902 MIPS32_MFC0(2,8,0), /* move badvaddr to $2 */
903 MIPS32_SW(2,35*4,1), /* sw $2,35*4($1) */
904 MIPS32_MFC0(2,13,0), /* move cause to $2 */
905 MIPS32_SW(2,36*4,1), /* sw $2,36*4($1) */
906 MIPS32_MFC0(2,24,0), /* move depc (pc) to $2 */
907 MIPS32_SW(2,37*4,1), /* sw $2,37*4($1) */
908
909 MIPS32_LW(2,0,15), /* lw $2,($15) */
910 MIPS32_LW(1,0,15), /* lw $1,($15) */
911 MIPS32_B(NEG16(58)), /* b start */
912 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
913 };
914
915 int retval;
916
917 retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
918 0, NULL, MIPS32NUMCOREREGS, regs, 1);
919
920 return retval;
921 }
922
923 /* fastdata upload/download requires an initialized working area
924 * to load the download code; it should not be called otherwise
925 * fetch order from the fastdata area
926 * 1. start addr
927 * 2. end addr
928 * 3. data ...
929 */
930 int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_area *source,
931 int write_t, uint32_t addr, int count, uint32_t *buf)
932 {
933 uint32_t handler_code[] = {
934 /* caution when editing, table is modified below */
935 /* r15 points to the start of this code */
936 MIPS32_SW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15),
937 MIPS32_SW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15),
938 MIPS32_SW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15),
939 MIPS32_SW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15),
940 /* start of fastdata area in t0 */
941 MIPS32_LUI(8,UPPER16(MIPS32_PRACC_FASTDATA_AREA)),
942 MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_FASTDATA_AREA)),
943 MIPS32_LW(9,0,8), /* start addr in t1 */
944 MIPS32_LW(10,0,8), /* end addr to t2 */
945 /* loop: */
946 /* 8 */ MIPS32_LW(11,0,0), /* lw t3,[t8 | r9] */
947 /* 9 */ MIPS32_SW(11,0,0), /* sw t3,[r9 | r8] */
948 MIPS32_BNE(10,9,NEG16(3)), /* bne $t2,t1,loop */
949 MIPS32_ADDI(9,9,4), /* addi t1,t1,4 */
950
951 MIPS32_LW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15),
952 MIPS32_LW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15),
953 MIPS32_LW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15),
954 MIPS32_LW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15),
955
956 MIPS32_LUI(15,UPPER16(MIPS32_PRACC_TEXT)),
957 MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_TEXT)),
958 MIPS32_JR(15), /* jr start */
959 MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
960 };
961
962 uint32_t jmp_code[] = {
963 MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
964 /* 1 */ MIPS32_LUI(15,0), /* addr of working area added below */
965 /* 2 */ MIPS32_ORI(15,15,0), /* addr of working area added below */
966 MIPS32_JR(15), /* jump to ram program */
967 MIPS32_NOP,
968 };
969
970 int retval, i;
971 uint32_t val, ejtag_ctrl, address;
972
973 if (source->size < MIPS32_FASTDATA_HANDLER_SIZE)
974 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
975
976 if (write_t)
977 {
978 handler_code[8] = MIPS32_LW(11,0,8); /* load data from probe at fastdata area */
979 handler_code[9] = MIPS32_SW(11,0,9); /* store data to RAM @ r9 */
980 }
981 else
982 {
983 handler_code[8] = MIPS32_LW(11,0,9); /* load data from RAM @ r9 */
984 handler_code[9] = MIPS32_SW(11,0,8); /* store data to probe at fastdata area */
985 }
986
987 /* write program into RAM */
988 mips32_pracc_write_mem32(ejtag_info, source->address, ARRAY_SIZE(handler_code), handler_code);
989
990 LOG_DEBUG("%s using 0x%.8" PRIx32 " for write handler", __func__, source->address);
991
992 jmp_code[1] |= UPPER16(source->address);
993 jmp_code[2] |= LOWER16(source->address);
994
995 for (i = 0; i < (int) ARRAY_SIZE(jmp_code); i++)
996 {
997 if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
998 return retval;
999
1000 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
1001 mips_ejtag_drscan_32(ejtag_info, &jmp_code[i]);
1002
1003 /* Clear the access pending bit (let the processor eat!) */
1004 ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
1005 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
1006 mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
1007 }
1008
1009 if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
1010 return retval;
1011
1012 /* next fetch to dmseg should be in FASTDATA_AREA, check */
1013 address = 0;
1014 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS);
1015 mips_ejtag_drscan_32(ejtag_info, &address);
1016
1017 if (address != MIPS32_PRACC_FASTDATA_AREA)
1018 return ERROR_FAIL;
1019
1020 /* Send the load start address */
1021 val = addr;
1022 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA);
1023 mips_ejtag_fastdata_scan(ejtag_info, 1, &val);
1024
1025 /* Send the load end address */
1026 val = addr + (count - 1) * 4;
1027 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA);
1028 mips_ejtag_fastdata_scan(ejtag_info, 1, &val);
1029
1030 for (i = 0; i < count; i++)
1031 {
1032 /* Send the data out using fastdata (clears the access pending bit) */
1033 if ((retval = mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++)) != ERROR_OK)
1034 return retval;
1035 }
1036
1037 if ((retval = jtag_execute_queue()) != ERROR_OK)
1038 {
1039 LOG_ERROR("fastdata load failed");
1040 return retval;
1041 }
1042
1043 if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
1044 return retval;
1045
1046 address = 0;
1047 mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS);
1048 mips_ejtag_drscan_32(ejtag_info, &address);
1049
1050 if (address != MIPS32_PRACC_TEXT)
1051 LOG_ERROR("mini program did not return to start");
1052
1053 return retval;
1054 }
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