1 /***************************************************************************
2 * Copyright (C) 2008 by Spencer Oliver *
3 * spen@spen-soft.co.uk *
5 * Copyright (C) 2008 by David T.L. Wong *
7 * Copyright (C) 2009 by David N. Claffey <dnclaffey@gmail.com> *
9 * Copyright (C) 2011 by Drasko DRASKOVIC *
10 * drasko.draskovic@gmail.com *
12 * This program is free software; you can redistribute it and/or modify *
13 * it under the terms of the GNU General Public License as published by *
14 * the Free Software Foundation; either version 2 of the License, or *
15 * (at your option) any later version. *
17 * This program is distributed in the hope that it will be useful, *
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
20 * GNU General Public License for more details. *
22 * You should have received a copy of the GNU General Public License *
23 * along with this program; if not, write to the *
24 * Free Software Foundation, Inc., *
25 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
26 ***************************************************************************/
29 * This version has optimized assembly routines for 32 bit operations:
32 * - write array of words
34 * One thing to be aware of is that the MIPS32 cpu will execute the
35 * instruction after a branch instruction (one delay slot).
42 * The LW $1, ($2 +100) instruction is also executed. If this is
43 * not wanted a NOP can be inserted:
50 * or the code can be changed to:
56 * The original code contained NOPs. I have removed these and moved
59 * I also moved the PRACC_STACK to 0xFF204000. This allows
60 * the use of 16 bits offsets to get pointers to the input
61 * and output area relative to the stack. Note that the stack
62 * isn't really a stack (the stack pointer is not 'moving')
63 * but a FIFO simulated in software.
65 * These changes result in a 35% speed increase when programming an
68 * More improvement could be gained if the registers do no need
69 * to be preserved but in that case the routines should be aware
70 * OpenOCD is used as a flash programmer or as a debug tool.
79 #include <helper/time_support.h>
82 #include "mips32_pracc.h"
84 struct mips32_pracc_context
{
85 uint32_t *local_iparam
;
87 uint32_t *local_oparam
;
93 struct mips_ejtag
*ejtag_info
;
96 static int mips32_pracc_read_mem8(struct mips_ejtag
*ejtag_info
,
97 uint32_t addr
, int count
, uint8_t *buf
);
98 static int mips32_pracc_read_mem16(struct mips_ejtag
*ejtag_info
,
99 uint32_t addr
, int count
, uint16_t *buf
);
100 static int mips32_pracc_read_mem32(struct mips_ejtag
*ejtag_info
,
101 uint32_t addr
, int count
, uint32_t *buf
);
102 static int mips32_pracc_read_u32(struct mips_ejtag
*ejtag_info
,
103 uint32_t addr
, uint32_t *buf
);
105 static int mips32_pracc_write_mem8(struct mips_ejtag
*ejtag_info
,
106 uint32_t addr
, int count
, uint8_t *buf
);
107 static int mips32_pracc_write_mem16(struct mips_ejtag
*ejtag_info
,
108 uint32_t addr
, int count
, uint16_t *buf
);
109 static int mips32_pracc_write_mem32(struct mips_ejtag
*ejtag_info
,
110 uint32_t addr
, int count
, uint32_t *buf
);
111 static int mips32_pracc_write_u32(struct mips_ejtag
*ejtag_info
,
112 uint32_t addr
, uint32_t *buf
);
114 static int mips32_pracc_sync_cache(struct mips_ejtag
*ejtag_info
,
115 uint32_t start_addr
, uint32_t end_addr
);
116 static int mips32_pracc_clean_invalidate_cache(struct mips_ejtag
*ejtag_info
,
117 uint32_t start_addr
, uint32_t end_addr
);
119 static int wait_for_pracc_rw(struct mips_ejtag
*ejtag_info
, uint32_t *ctrl
)
122 long long then
= timeval_ms();
126 /* wait for the PrAcc to become "1" */
127 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_CONTROL
);
128 ejtag_ctrl
= ejtag_info
->ejtag_ctrl
;
131 retval
= mips_ejtag_drscan_32(ejtag_info
, &ejtag_ctrl
);
132 if (retval
!= ERROR_OK
)
135 if (ejtag_ctrl
& EJTAG_CTRL_PRACC
)
138 timeout
= timeval_ms() - then
;
139 if (timeout
> 1000) {
140 LOG_DEBUG("DEBUGMODULE: No memory access in progress!");
141 return ERROR_JTAG_DEVICE_ERROR
;
149 static int mips32_pracc_exec_read(struct mips32_pracc_context
*ctx
, uint32_t address
)
151 struct mips_ejtag
*ejtag_info
= ctx
->ejtag_info
;
153 uint32_t ejtag_ctrl
, data
;
155 if ((address
>= MIPS32_PRACC_PARAM_IN
)
156 && (address
<= MIPS32_PRACC_PARAM_IN
+ ctx
->num_iparam
* 4)) {
157 offset
= (address
- MIPS32_PRACC_PARAM_IN
) / 4;
158 data
= ctx
->local_iparam
[offset
];
159 } else if ((address
>= MIPS32_PRACC_PARAM_OUT
)
160 && (address
<= MIPS32_PRACC_PARAM_OUT
+ ctx
->num_oparam
* 4)) {
161 offset
= (address
- MIPS32_PRACC_PARAM_OUT
) / 4;
162 data
= ctx
->local_oparam
[offset
];
163 } else if ((address
>= MIPS32_PRACC_TEXT
)
164 && (address
<= MIPS32_PRACC_TEXT
+ ctx
->code_len
* 4)) {
165 offset
= (address
- MIPS32_PRACC_TEXT
) / 4;
166 data
= ctx
->code
[offset
];
167 } else if (address
== MIPS32_PRACC_STACK
) {
168 /* save to our debug stack */
169 data
= ctx
->stack
[--ctx
->stack_offset
];
171 /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back
172 * to start of debug vector */
174 LOG_ERROR("Error reading unexpected address 0x%8.8" PRIx32
"", address
);
175 return ERROR_JTAG_DEVICE_ERROR
;
178 /* Send the data out */
179 mips_ejtag_set_instr(ctx
->ejtag_info
, EJTAG_INST_DATA
);
180 mips_ejtag_drscan_32_out(ctx
->ejtag_info
, data
);
182 /* Clear the access pending bit (let the processor eat!) */
183 ejtag_ctrl
= ejtag_info
->ejtag_ctrl
& ~EJTAG_CTRL_PRACC
;
184 mips_ejtag_set_instr(ctx
->ejtag_info
, EJTAG_INST_CONTROL
);
185 mips_ejtag_drscan_32_out(ctx
->ejtag_info
, ejtag_ctrl
);
187 return jtag_execute_queue();
190 static int mips32_pracc_exec_write(struct mips32_pracc_context
*ctx
, uint32_t address
)
192 uint32_t ejtag_ctrl
, data
;
194 struct mips_ejtag
*ejtag_info
= ctx
->ejtag_info
;
197 mips_ejtag_set_instr(ctx
->ejtag_info
, EJTAG_INST_DATA
);
198 retval
= mips_ejtag_drscan_32(ctx
->ejtag_info
, &data
);
199 if (retval
!= ERROR_OK
)
202 /* Clear access pending bit */
203 ejtag_ctrl
= ejtag_info
->ejtag_ctrl
& ~EJTAG_CTRL_PRACC
;
204 mips_ejtag_set_instr(ctx
->ejtag_info
, EJTAG_INST_CONTROL
);
205 mips_ejtag_drscan_32_out(ctx
->ejtag_info
, ejtag_ctrl
);
207 retval
= jtag_execute_queue();
208 if (retval
!= ERROR_OK
)
211 if ((address
>= MIPS32_PRACC_PARAM_IN
)
212 && (address
<= MIPS32_PRACC_PARAM_IN
+ ctx
->num_iparam
* 4)) {
213 offset
= (address
- MIPS32_PRACC_PARAM_IN
) / 4;
214 ctx
->local_iparam
[offset
] = data
;
215 } else if ((address
>= MIPS32_PRACC_PARAM_OUT
)
216 && (address
<= MIPS32_PRACC_PARAM_OUT
+ ctx
->num_oparam
* 4)) {
217 offset
= (address
- MIPS32_PRACC_PARAM_OUT
) / 4;
218 ctx
->local_oparam
[offset
] = data
;
219 } else if (address
== MIPS32_PRACC_STACK
) {
220 /* save data onto our stack */
221 ctx
->stack
[ctx
->stack_offset
++] = data
;
223 LOG_ERROR("Error writing unexpected address 0x%8.8" PRIx32
"", address
);
224 return ERROR_JTAG_DEVICE_ERROR
;
230 int mips32_pracc_exec(struct mips_ejtag
*ejtag_info
, int code_len
, const uint32_t *code
,
231 int num_param_in
, uint32_t *param_in
, int num_param_out
, uint32_t *param_out
, int cycle
)
234 uint32_t address
, data
;
235 struct mips32_pracc_context ctx
;
239 ctx
.local_iparam
= param_in
;
240 ctx
.local_oparam
= param_out
;
241 ctx
.num_iparam
= num_param_in
;
242 ctx
.num_oparam
= num_param_out
;
244 ctx
.code_len
= code_len
;
245 ctx
.ejtag_info
= ejtag_info
;
246 ctx
.stack_offset
= 0;
249 retval
= wait_for_pracc_rw(ejtag_info
, &ejtag_ctrl
);
250 if (retval
!= ERROR_OK
)
254 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_ADDRESS
);
255 retval
= mips_ejtag_drscan_32(ejtag_info
, &address
);
256 if (retval
!= ERROR_OK
)
259 /* Check for read or write */
260 if (ejtag_ctrl
& EJTAG_CTRL_PRNW
) {
261 retval
= mips32_pracc_exec_write(&ctx
, address
);
262 if (retval
!= ERROR_OK
)
265 /* Check to see if its reading at the debug vector. The first pass through
266 * the module is always read at the vector, so the first one we allow. When
267 * the second read from the vector occurs we are done and just exit. */
268 if ((address
== MIPS32_PRACC_TEXT
) && (pass
++))
271 retval
= mips32_pracc_exec_read(&ctx
, address
);
272 if (retval
!= ERROR_OK
)
280 /* stack sanity check */
281 if (ctx
.stack_offset
!= 0)
282 LOG_DEBUG("Pracc Stack not zero");
287 int mips32_pracc_read_mem(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int size
, int count
, void *buf
)
291 return mips32_pracc_read_mem8(ejtag_info
, addr
, count
, (uint8_t *)buf
);
293 return mips32_pracc_read_mem16(ejtag_info
, addr
, count
, (uint16_t *)buf
);
296 return mips32_pracc_read_u32(ejtag_info
, addr
, (uint32_t *)buf
);
298 return mips32_pracc_read_mem32(ejtag_info
, addr
, count
, (uint32_t *)buf
);
304 static int mips32_pracc_read_mem32(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int count
, uint32_t *buf
)
306 static const uint32_t code
[] = {
308 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
309 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
310 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
311 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
312 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
313 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
314 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
316 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
317 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
318 MIPS32_LW(9, 0, 8), /* $9 = mem[$8]; read addr */
319 MIPS32_LW(10, 4, 8), /* $10 = mem[$8 + 4]; read count */
320 MIPS32_LUI(11, UPPER16(MIPS32_PRACC_PARAM_OUT
)), /* $11 = MIPS32_PRACC_PARAM_OUT */
321 MIPS32_ORI(11, 11, LOWER16(MIPS32_PRACC_PARAM_OUT
)),
323 MIPS32_BEQ(0, 10, 8), /* beq 0, $10, end */
326 MIPS32_LW(8, 0, 9), /* lw $8,0($9), Load $8 with the word @mem[$9] */
327 MIPS32_SW(8, 0, 11), /* sw $8,0($11) */
329 MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
330 MIPS32_ADDI(9, 9, 4), /* $1 += 4 */
331 MIPS32_ADDI(11, 11, 4), /* $11 += 4 */
333 MIPS32_B(NEG16(8)), /* b loop */
336 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
337 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
338 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
339 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
340 MIPS32_B(NEG16(27)), /* b start */
341 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
344 int retval
= ERROR_OK
;
347 uint32_t param_in
[2];
357 param_in
[1] = blocksize
;
359 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
360 ARRAY_SIZE(param_in
), param_in
, blocksize
, &buf
[wordsread
], 1);
361 if (retval
!= ERROR_OK
)
365 addr
+= blocksize
*sizeof(uint32_t);
366 wordsread
+= blocksize
;
372 static int mips32_pracc_read_u32(struct mips_ejtag
*ejtag_info
, uint32_t addr
, uint32_t *buf
)
374 static const uint32_t code
[] = {
376 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
377 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
378 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
379 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
381 MIPS32_LW(8, NEG16(MIPS32_PRACC_STACK
-MIPS32_PRACC_PARAM_IN
), 15), /* load R8 @ param_in[0] = address */
383 MIPS32_LW(8, 0, 8), /* lw $8,0($8), Load $8 with the word @mem[$8] */
384 MIPS32_SW(8, NEG16(MIPS32_PRACC_STACK
- MIPS32_PRACC_PARAM_OUT
), 15), /* store R8 @ param_out[0] */
386 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
387 MIPS32_B(NEG16(9)), /* b start */
388 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
391 int retval
= ERROR_OK
;
392 uint32_t param_in
[1];
396 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
397 ARRAY_SIZE(param_in
), param_in
, 1, buf
, 1);
398 if (retval
!= ERROR_OK
)
404 static int mips32_pracc_read_mem16(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int count
, uint16_t *buf
)
406 static const uint32_t code
[] = {
408 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
409 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
410 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
411 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
412 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
413 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
414 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
416 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
417 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
418 MIPS32_LW(9, 0, 8), /* $9 = mem[$8]; read addr */
419 MIPS32_LW(10, 4, 8), /* $10 = mem[$8 + 4]; read count */
420 MIPS32_LUI(11, UPPER16(MIPS32_PRACC_PARAM_OUT
)), /* $11 = MIPS32_PRACC_PARAM_OUT */
421 MIPS32_ORI(11, 11, LOWER16(MIPS32_PRACC_PARAM_OUT
)),
423 MIPS32_BEQ(0, 10, 8), /* beq 0, $10, end */
426 MIPS32_LHU(8, 0, 9), /* lw $8,0($9), Load $8 with the halfword @mem[$9] */
427 MIPS32_SW(8, 0, 11), /* sw $8,0($11) */
429 MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
430 MIPS32_ADDI(9, 9, 2), /* $9 += 2 */
431 MIPS32_ADDI(11, 11, 4), /* $11 += 4 */
432 MIPS32_B(NEG16(8)), /* b loop */
435 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
436 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
437 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
438 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
439 MIPS32_B(NEG16(27)), /* b start */
440 MIPS32_MFC0(15, 30, 0), /* move COP0 DeSave to $15 */
443 /* TODO remove array */
444 uint32_t *param_out
= malloc(count
* sizeof(uint32_t));
445 if (param_out
== NULL
) {
446 LOG_ERROR("Out of memory");
450 int retval
= ERROR_OK
;
453 uint32_t param_in
[2];
461 param_in
[1] = blocksize
;
463 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
464 ARRAY_SIZE(param_in
), param_in
, blocksize
, ¶m_out
[hwordsread
], 1);
466 if (retval
!= ERROR_OK
)
470 addr
+= blocksize
*sizeof(uint16_t);
471 hwordsread
+= blocksize
;
475 for (i
= 0; i
< hwordsread
; i
++)
476 buf
[i
] = param_out
[i
];
482 static int mips32_pracc_read_mem8(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int count
, uint8_t *buf
)
484 static const uint32_t code
[] = {
486 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
487 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
488 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
489 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
490 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
491 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
492 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
494 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
495 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
496 MIPS32_LW(9, 0, 8), /* $9 = mem[$8]; read addr */
497 MIPS32_LW(10, 4, 8), /* $10 = mem[$8 + 4]; read count */
498 MIPS32_LUI(11, UPPER16(MIPS32_PRACC_PARAM_OUT
)), /* $11 = MIPS32_PRACC_PARAM_OUT */
499 MIPS32_ORI(11, 11, LOWER16(MIPS32_PRACC_PARAM_OUT
)),
501 MIPS32_BEQ(0, 10, 8), /* beq 0, $10, end */
504 MIPS32_LBU(8, 0, 9), /* lw $8,0($9), Load t4 with the byte @mem[t1] */
505 MIPS32_SW(8, 0, 11), /* sw $8,0($11) */
507 MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
508 MIPS32_ADDI(9, 9, 1), /* $9 += 1 */
509 MIPS32_ADDI(11, 11, 4), /* $11 += 4 */
510 MIPS32_B(NEG16(8)), /* b loop */
513 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
514 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
515 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
516 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
517 MIPS32_B(NEG16(27)), /* b start */
518 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
521 /* TODO remove array */
522 uint32_t *param_out
= malloc(count
* sizeof(uint32_t));
523 if (param_out
== NULL
) {
524 LOG_ERROR("Out of memory");
528 int retval
= ERROR_OK
;
530 uint32_t param_in
[2];
539 param_in
[1] = blocksize
;
541 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
542 ARRAY_SIZE(param_in
), param_in
, count
, ¶m_out
[bytesread
], 1);
544 if (retval
!= ERROR_OK
)
549 bytesread
+= blocksize
;
552 for (i
= 0; i
< bytesread
; i
++)
553 buf
[i
] = param_out
[i
];
559 int mips32_cp0_read(struct mips_ejtag
*ejtag_info
, uint32_t *val
, uint32_t cp0_reg
, uint32_t cp0_sel
)
562 * Do not make this code static, but regenerate it every time,
563 * as 5th element has to be changed to add parameters
567 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
568 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
569 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
570 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
571 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
573 /* 5 */ MIPS32_MFC0(8, 0, 0), /* move COP0 [cp0_reg select] to $8 */
575 MIPS32_LUI(9, UPPER16(MIPS32_PRACC_PARAM_OUT
)), /* $11 = MIPS32_PRACC_PARAM_OUT */
576 MIPS32_ORI(9, 9, LOWER16(MIPS32_PRACC_PARAM_OUT
)),
577 MIPS32_SW(8, 0, 9), /* sw $8,0($9) */
579 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
580 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
581 MIPS32_B(NEG16(12)), /* b start */
582 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
586 * Note that our input parametes cp0_reg and cp0_sel
587 * are numbers (not gprs) which make part of mfc0 instruction opcode.
589 * These are not fix, but can be different for each mips32_cp0_read() function call,
590 * and that is why we must insert them directly into opcode,
591 * i.e. we can not pass it on EJTAG microprogram stack (via param_in),
592 * and put them into the gprs later from MIPS32_PRACC_STACK
593 * because mfc0 do not use gpr as a parameter for the cp0_reg and select part,
594 * but plain (immediate) number.
596 * MIPS32_MTC0 is implemented via MIPS32_R_INST macro.
597 * In order to insert our parameters, we must change rd and funct fields.
599 code
[5] |= (cp0_reg
<< 11) | cp0_sel
; /* change rd and funct of MIPS32_R_INST macro */
601 /* TODO remove array */
602 uint32_t *param_out
= val
;
605 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
, 0, NULL
, 1, param_out
, 1);
610 int mips32_cp0_write(struct mips_ejtag
*ejtag_info
,
611 uint32_t val
, uint32_t cp0_reg
, uint32_t cp0_sel
)
615 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
616 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
617 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
618 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
619 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
621 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
622 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
623 MIPS32_LW(9, 0, 8), /* Load write val to $9 */
625 /* 8 */ MIPS32_MTC0(9, 0, 0), /* move $9 to COP0 [cp0_reg select] */
627 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
628 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
629 MIPS32_B(NEG16(12)), /* b start */
630 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
634 * Note that MIPS32_MTC0 macro is implemented via MIPS32_R_INST macro.
635 * In order to insert our parameters, we must change rd and funct fields.
637 code
[8] |= (cp0_reg
<< 11) | cp0_sel
; /* change rd and funct fields of MIPS32_R_INST macro */
639 /* TODO remove array */
640 uint32_t *param_in
= malloc(1 * sizeof(uint32_t));
644 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
, 1, param_in
, 0, NULL
, 1);
652 * \b mips32_pracc_sync_cache
654 * Synchronize Caches to Make Instruction Writes Effective
655 * (ref. doc. MIPS32 Architecture For Programmers Volume II: The MIPS32 Instruction Set,
656 * Document Number: MD00086, Revision 2.00, June 9, 2003)
658 * When the instruction stream is written, the SYNCI instruction should be used
659 * in conjunction with other instructions to make the newly-written instructions effective.
662 * A program that loads another program into memory is actually writing the D- side cache.
663 * The instructions it has loaded can't be executed until they reach the I-cache.
665 * After the instructions have been written, the loader should arrange
666 * to write back any containing D-cache line and invalidate any locations
667 * already in the I-cache.
669 * You can do that with cache instructions, but those instructions are only available in kernel mode,
670 * and a loader writing instructions for the use of its own process need not be privileged software.
672 * In the latest MIPS32/64 CPUs, MIPS provides the synci instruction,
673 * which does the whole job for a cache-line-sized chunk of the memory you just loaded:
674 * That is, it arranges a D-cache write-back and an I-cache invalidate.
676 * To employ synci at user level, you need to know the size of a cache line,
677 * and that can be obtained with a rdhwr SYNCI_Step
678 * from one of the standard “hardware registers”.
680 static int mips32_pracc_sync_cache(struct mips_ejtag
*ejtag_info
,
681 uint32_t start_addr
, uint32_t end_addr
)
683 static const uint32_t code
[] = {
685 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
686 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
687 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
688 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
689 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
690 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
691 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
693 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
694 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
695 MIPS32_LW(9, 0, 8), /* Load write start_addr to $9 */
696 MIPS32_LW(10, 4, 8), /* Load write end_addr to $10 */
698 MIPS32_RDHWR(11, MIPS32_SYNCI_STEP
), /* $11 = MIPS32_SYNCI_STEP */
699 MIPS32_BEQ(11, 0, 6), /* beq $11, $0, end */
702 MIPS32_SYNCI(0, 9), /* synci 0($9) */
703 MIPS32_SLTU(8, 10, 9), /* sltu $8, $10, $9 # $8 = $10 < $9 ? 1 : 0 */
704 MIPS32_BNE(8, 0, NEG16(3)), /* bne $8, $0, synci_loop */
705 MIPS32_ADDU(9, 9, 11), /* $9 += MIPS32_SYNCI_STEP */
708 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
709 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
710 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
711 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
712 MIPS32_B(NEG16(24)), /* b start */
713 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
716 /* TODO remove array */
717 uint32_t *param_in
= malloc(2 * sizeof(uint32_t));
719 param_in
[0] = start_addr
;
720 param_in
[1] = end_addr
;
722 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
, 2, param_in
, 0, NULL
, 1);
730 * \b mips32_pracc_clean_invalidate_cache
732 * Writeback D$ and Invalidate I$
733 * so that the instructions written can be visible to CPU
735 static int mips32_pracc_clean_invalidate_cache(struct mips_ejtag
*ejtag_info
,
736 uint32_t start_addr
, uint32_t end_addr
)
738 static const uint32_t code
[] = {
740 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
741 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
742 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
743 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
744 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
745 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
746 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
748 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
749 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
750 MIPS32_LW(9, 0, 8), /* Load write start_addr to $9 */
751 MIPS32_LW(10, 4, 8), /* Load write end_addr to $10 */
752 MIPS32_LW(11, 8, 8), /* Load write clsiz to $11 */
755 MIPS32_SLTU(8, 10, 9), /* sltu $8, $10, $9 : $8 <- $10 < $9 ? */
756 MIPS32_BGTZ(8, 6), /* bgtz $8, end */
759 MIPS32_CACHE(MIPS32_CACHE_D_HIT_WRITEBACK
, 0, 9), /* cache Hit_Writeback_D, 0($9) */
760 MIPS32_CACHE(MIPS32_CACHE_I_HIT_INVALIDATE
, 0, 9), /* cache Hit_Invalidate_I, 0($9) */
762 MIPS32_ADDU(9, 9, 11), /* $9 += $11 */
764 MIPS32_B(NEG16(7)), /* b cache_loop */
767 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
768 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
769 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
770 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
771 MIPS32_B(NEG16(25)), /* b start */
772 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
776 * Find cache line size in bytes
781 mips32_cp0_read(ejtag_info
, &conf
, 16, 1);
782 dl
= (conf
& MIPS32_CONFIG1_DL_MASK
) >> MIPS32_CONFIG1_DL_SHIFT
;
784 /* dl encoding : dl=1 => 4 bytes, dl=2 => 8 bytes, etc... */
787 /* TODO remove array */
788 uint32_t *param_in
= malloc(3 * sizeof(uint32_t));
790 param_in
[0] = start_addr
;
791 param_in
[1] = end_addr
;
794 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
, 3, param_in
, 0, NULL
, 1);
802 int mips32_pracc_write_mem(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int size
, int count
, void *buf
)
808 retval
= mips32_pracc_write_mem8(ejtag_info
, addr
, count
, (uint8_t *)buf
);
811 retval
= mips32_pracc_write_mem16(ejtag_info
, addr
, count
, (uint16_t *)buf
);
815 retval
= mips32_pracc_write_u32(ejtag_info
, addr
, (uint32_t *)buf
);
817 retval
= mips32_pracc_write_mem32(ejtag_info
, addr
, count
, (uint32_t *)buf
);
824 * If we are in the cachable regoion and cache is activated,
825 * we must clean D$ + invalidate I$ after we did the write,
826 * so that changes do not continue to live only in D$, but to be
827 * replicated in I$ also (maybe we wrote the istructions)
832 mips32_cp0_read(ejtag_info
, &conf
, 16, 0);
834 switch (KSEGX(addr
)) {
836 cached
= (conf
& MIPS32_CONFIG0_KU_MASK
) >> MIPS32_CONFIG0_KU_SHIFT
;
839 cached
= (conf
& MIPS32_CONFIG0_K0_MASK
) >> MIPS32_CONFIG0_K0_SHIFT
;
842 /* uncachable segment - nothing to do */
846 cached
= (conf
& MIPS32_CONFIG0_K23_MASK
) >> MIPS32_CONFIG0_K23_SHIFT
;
854 * Check cachablitiy bits coherency algorithm -
855 * is the region cacheable or uncached.
856 * If cacheable we have to synchronize the cache
859 uint32_t start_addr
, end_addr
;
863 end_addr
= addr
+ count
* size
;
865 /** select cache synchronisation mechanism based on Architecture Release */
866 rel
= (conf
& MIPS32_CONFIG0_AR_MASK
) >> MIPS32_CONFIG0_AR_SHIFT
;
868 case MIPS32_ARCH_REL1
:
869 /* MIPS32/64 Release 1 - we must use cache instruction */
870 mips32_pracc_clean_invalidate_cache(ejtag_info
, start_addr
, end_addr
);
872 case MIPS32_ARCH_REL2
:
873 /* MIPS32/64 Release 2 - we can use synci instruction */
874 mips32_pracc_sync_cache(ejtag_info
, start_addr
, end_addr
);
885 static int mips32_pracc_write_mem32(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int count
, uint32_t *buf
)
887 static const uint32_t code
[] = {
889 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
890 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
891 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
892 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
893 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
894 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
895 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
897 MIPS32_ADDI(8, 15, NEG16(MIPS32_PRACC_STACK
-MIPS32_PRACC_PARAM_IN
)), /* $8= MIPS32_PRACC_PARAM_IN */
898 MIPS32_LW(9, 0, 8), /* Load write addr to $9 */
899 MIPS32_LW(10, 4, 8), /* Load write count to $10 */
900 MIPS32_ADDI(8, 8, 8), /* $8 += 8 beginning of data */
903 MIPS32_LW(11, 0, 8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
904 MIPS32_SW(11, 0, 9), /* sw $11,0($9) */
906 MIPS32_ADDI(9, 9, 4), /* $9 += 4 */
907 MIPS32_BNE(10, 9, NEG16(4)), /* bne $10, $9, loop */
908 MIPS32_ADDI(8, 8, 4), /* $8 += 4 */
911 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
912 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
913 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
914 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
915 MIPS32_B(NEG16(21)), /* b start */
916 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
919 /* TODO remove array */
920 uint32_t *param_in
= malloc((count
+ 2) * sizeof(uint32_t));
922 param_in
[1] = addr
+ (count
* sizeof(uint32_t)); /* last address */
924 memcpy(¶m_in
[2], buf
, count
* sizeof(uint32_t));
927 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
928 count
+ 2, param_in
, 0, NULL
, 1);
935 static int mips32_pracc_write_u32(struct mips_ejtag
*ejtag_info
, uint32_t addr
, uint32_t *buf
)
937 static const uint32_t code
[] = {
939 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
940 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
941 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
942 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
943 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
945 MIPS32_LW(8, NEG16((MIPS32_PRACC_STACK
-MIPS32_PRACC_PARAM_IN
)-4), 15), /* load R8 @ param_in[1] = data */
946 MIPS32_LW(9, NEG16(MIPS32_PRACC_STACK
-MIPS32_PRACC_PARAM_IN
), 15), /* load R9 @ param_in[0] = address */
948 MIPS32_SW(8, 0, 9), /* sw $8,0($9) */
950 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
951 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
952 MIPS32_B(NEG16(11)), /* b start */
953 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
956 /* TODO remove array */
957 uint32_t param_in
[1 + 1];
961 return mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
962 ARRAY_SIZE(param_in
), param_in
, 0, NULL
, 1);
965 static int mips32_pracc_write_mem16(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int count
, uint16_t *buf
)
967 static const uint32_t code
[] = {
969 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
970 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
971 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
972 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
973 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
974 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
975 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
977 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
978 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
979 MIPS32_LW(9, 0, 8), /* Load write addr to $9 */
980 MIPS32_LW(10, 4, 8), /* Load write count to $10 */
981 MIPS32_ADDI(8, 8, 8), /* $8 += 8 */
983 MIPS32_BEQ(0, 10, 8), /* beq $0, $10, end */
986 MIPS32_LW(11, 0, 8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
987 MIPS32_SH(11, 0, 9), /* sh $11,0($9) */
989 MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
990 MIPS32_ADDI(9, 9, 2), /* $9 += 2 */
991 MIPS32_ADDI(8, 8, 4), /* $8 += 4 */
993 MIPS32_B(NEG16(8)), /* b loop */
996 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
997 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
998 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
999 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
1000 MIPS32_B(NEG16(26)), /* b start */
1001 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
1004 /* TODO remove array */
1005 uint32_t *param_in
= malloc((count
+ 2) * sizeof(uint32_t));
1008 param_in
[1] = count
;
1010 for (i
= 0; i
< count
; i
++)
1011 param_in
[i
+ 2] = buf
[i
];
1014 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
1015 count
+ 2, param_in
, 0, NULL
, 1);
1022 static int mips32_pracc_write_mem8(struct mips_ejtag
*ejtag_info
, uint32_t addr
, int count
, uint8_t *buf
)
1024 static const uint32_t code
[] = {
1026 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
1027 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
1028 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
1029 MIPS32_SW(8, 0, 15), /* sw $8,($15) */
1030 MIPS32_SW(9, 0, 15), /* sw $9,($15) */
1031 MIPS32_SW(10, 0, 15), /* sw $10,($15) */
1032 MIPS32_SW(11, 0, 15), /* sw $11,($15) */
1034 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $8 = MIPS32_PRACC_PARAM_IN */
1035 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN
)),
1036 MIPS32_LW(9, 0, 8), /* Load write addr to $9 */
1037 MIPS32_LW(10, 4, 8), /* Load write count to $10 */
1038 MIPS32_ADDI(8, 8, 8), /* $8 += 8 */
1040 MIPS32_BEQ(0, 10, 8), /* beq $0, $10, end */
1043 MIPS32_LW(11, 0, 8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
1044 MIPS32_SB(11, 0, 9), /* sb $11,0($9) */
1046 MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
1047 MIPS32_ADDI(9, 9, 1), /* $9 += 1 */
1048 MIPS32_ADDI(8, 8, 4), /* $8 += 4 */
1050 MIPS32_B(NEG16(8)), /* b loop */
1053 MIPS32_LW(11, 0, 15), /* lw $11,($15) */
1054 MIPS32_LW(10, 0, 15), /* lw $10,($15) */
1055 MIPS32_LW(9, 0, 15), /* lw $9,($15) */
1056 MIPS32_LW(8, 0, 15), /* lw $8,($15) */
1057 MIPS32_B(NEG16(26)), /* b start */
1058 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
1061 /* TODO remove array */
1062 uint32_t *param_in
= malloc((count
+ 2) * sizeof(uint32_t));
1066 param_in
[1] = count
;
1068 for (i
= 0; i
< count
; i
++)
1069 param_in
[i
+ 2] = buf
[i
];
1071 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
1072 count
+ 2, param_in
, 0, NULL
, 1);
1079 int mips32_pracc_write_regs(struct mips_ejtag
*ejtag_info
, uint32_t *regs
)
1081 static const uint32_t code
[] = {
1083 MIPS32_LUI(2, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $2 = MIPS32_PRACC_PARAM_IN */
1084 MIPS32_ORI(2, 2, LOWER16(MIPS32_PRACC_PARAM_IN
)),
1085 MIPS32_LW(1, 1*4, 2), /* lw $1,1*4($2) */
1086 MIPS32_LW(15, 15*4, 2), /* lw $15,15*4($2) */
1087 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
1088 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
1089 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
1090 MIPS32_SW(1, 0, 15), /* sw $1,($15) */
1091 MIPS32_LUI(1, UPPER16(MIPS32_PRACC_PARAM_IN
)), /* $1 = MIPS32_PRACC_PARAM_IN */
1092 MIPS32_ORI(1, 1, LOWER16(MIPS32_PRACC_PARAM_IN
)),
1093 MIPS32_LW(3, 3*4, 1), /* lw $3,3*4($1) */
1094 MIPS32_LW(4, 4*4, 1), /* lw $4,4*4($1) */
1095 MIPS32_LW(5, 5*4, 1), /* lw $5,5*4($1) */
1096 MIPS32_LW(6, 6*4, 1), /* lw $6,6*4($1) */
1097 MIPS32_LW(7, 7*4, 1), /* lw $7,7*4($1) */
1098 MIPS32_LW(8, 8*4, 1), /* lw $8,8*4($1) */
1099 MIPS32_LW(9, 9*4, 1), /* lw $9,9*4($1) */
1100 MIPS32_LW(10, 10*4, 1), /* lw $10,10*4($1) */
1101 MIPS32_LW(11, 11*4, 1), /* lw $11,11*4($1) */
1102 MIPS32_LW(12, 12*4, 1), /* lw $12,12*4($1) */
1103 MIPS32_LW(13, 13*4, 1), /* lw $13,13*4($1) */
1104 MIPS32_LW(14, 14*4, 1), /* lw $14,14*4($1) */
1105 MIPS32_LW(16, 16*4, 1), /* lw $16,16*4($1) */
1106 MIPS32_LW(17, 17*4, 1), /* lw $17,17*4($1) */
1107 MIPS32_LW(18, 18*4, 1), /* lw $18,18*4($1) */
1108 MIPS32_LW(19, 19*4, 1), /* lw $19,19*4($1) */
1109 MIPS32_LW(20, 20*4, 1), /* lw $20,20*4($1) */
1110 MIPS32_LW(21, 21*4, 1), /* lw $21,21*4($1) */
1111 MIPS32_LW(22, 22*4, 1), /* lw $22,22*4($1) */
1112 MIPS32_LW(23, 23*4, 1), /* lw $23,23*4($1) */
1113 MIPS32_LW(24, 24*4, 1), /* lw $24,24*4($1) */
1114 MIPS32_LW(25, 25*4, 1), /* lw $25,25*4($1) */
1115 MIPS32_LW(26, 26*4, 1), /* lw $26,26*4($1) */
1116 MIPS32_LW(27, 27*4, 1), /* lw $27,27*4($1) */
1117 MIPS32_LW(28, 28*4, 1), /* lw $28,28*4($1) */
1118 MIPS32_LW(29, 29*4, 1), /* lw $29,29*4($1) */
1119 MIPS32_LW(30, 30*4, 1), /* lw $30,30*4($1) */
1120 MIPS32_LW(31, 31*4, 1), /* lw $31,31*4($1) */
1122 MIPS32_LW(2, 32*4, 1), /* lw $2,32*4($1) */
1123 MIPS32_MTC0(2, 12, 0), /* move $2 to status */
1124 MIPS32_LW(2, 33*4, 1), /* lw $2,33*4($1) */
1125 MIPS32_MTLO(2), /* move $2 to lo */
1126 MIPS32_LW(2, 34*4, 1), /* lw $2,34*4($1) */
1127 MIPS32_MTHI(2), /* move $2 to hi */
1128 MIPS32_LW(2, 35*4, 1), /* lw $2,35*4($1) */
1129 MIPS32_MTC0(2, 8, 0), /* move $2 to badvaddr */
1130 MIPS32_LW(2, 36*4, 1), /* lw $2,36*4($1) */
1131 MIPS32_MTC0(2, 13, 0), /* move $2 to cause*/
1132 MIPS32_LW(2, 37*4, 1), /* lw $2,37*4($1) */
1133 MIPS32_MTC0(2, 24, 0), /* move $2 to depc (pc) */
1135 MIPS32_LW(2, 2*4, 1), /* lw $2,2*4($1) */
1136 MIPS32_LW(1, 0, 15), /* lw $1,($15) */
1137 MIPS32_B(NEG16(53)), /* b start */
1138 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
1143 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
1144 MIPS32NUMCOREREGS
, regs
, 0, NULL
, 1);
1149 int mips32_pracc_read_regs(struct mips_ejtag
*ejtag_info
, uint32_t *regs
)
1151 static const uint32_t code
[] = {
1153 MIPS32_MTC0(2, 31, 0), /* move $2 to COP0 DeSave */
1154 MIPS32_LUI(2, UPPER16(MIPS32_PRACC_PARAM_OUT
)), /* $2 = MIPS32_PRACC_PARAM_OUT */
1155 MIPS32_ORI(2, 2, LOWER16(MIPS32_PRACC_PARAM_OUT
)),
1156 MIPS32_SW(0, 0*4, 2), /* sw $0,0*4($2) */
1157 MIPS32_SW(1, 1*4, 2), /* sw $1,1*4($2) */
1158 MIPS32_SW(15, 15*4, 2), /* sw $15,15*4($2) */
1159 MIPS32_MFC0(2, 31, 0), /* move COP0 DeSave to $2 */
1160 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
1161 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK
)), /* $15 = MIPS32_PRACC_STACK */
1162 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK
)),
1163 MIPS32_SW(1, 0, 15), /* sw $1,($15) */
1164 MIPS32_SW(2, 0, 15), /* sw $2,($15) */
1165 MIPS32_LUI(1, UPPER16(MIPS32_PRACC_PARAM_OUT
)), /* $1 = MIPS32_PRACC_PARAM_OUT */
1166 MIPS32_ORI(1, 1, LOWER16(MIPS32_PRACC_PARAM_OUT
)),
1167 MIPS32_SW(2, 2*4, 1), /* sw $2,2*4($1) */
1168 MIPS32_SW(3, 3*4, 1), /* sw $3,3*4($1) */
1169 MIPS32_SW(4, 4*4, 1), /* sw $4,4*4($1) */
1170 MIPS32_SW(5, 5*4, 1), /* sw $5,5*4($1) */
1171 MIPS32_SW(6, 6*4, 1), /* sw $6,6*4($1) */
1172 MIPS32_SW(7, 7*4, 1), /* sw $7,7*4($1) */
1173 MIPS32_SW(8, 8*4, 1), /* sw $8,8*4($1) */
1174 MIPS32_SW(9, 9*4, 1), /* sw $9,9*4($1) */
1175 MIPS32_SW(10, 10*4, 1), /* sw $10,10*4($1) */
1176 MIPS32_SW(11, 11*4, 1), /* sw $11,11*4($1) */
1177 MIPS32_SW(12, 12*4, 1), /* sw $12,12*4($1) */
1178 MIPS32_SW(13, 13*4, 1), /* sw $13,13*4($1) */
1179 MIPS32_SW(14, 14*4, 1), /* sw $14,14*4($1) */
1180 MIPS32_SW(16, 16*4, 1), /* sw $16,16*4($1) */
1181 MIPS32_SW(17, 17*4, 1), /* sw $17,17*4($1) */
1182 MIPS32_SW(18, 18*4, 1), /* sw $18,18*4($1) */
1183 MIPS32_SW(19, 19*4, 1), /* sw $19,19*4($1) */
1184 MIPS32_SW(20, 20*4, 1), /* sw $20,20*4($1) */
1185 MIPS32_SW(21, 21*4, 1), /* sw $21,21*4($1) */
1186 MIPS32_SW(22, 22*4, 1), /* sw $22,22*4($1) */
1187 MIPS32_SW(23, 23*4, 1), /* sw $23,23*4($1) */
1188 MIPS32_SW(24, 24*4, 1), /* sw $24,24*4($1) */
1189 MIPS32_SW(25, 25*4, 1), /* sw $25,25*4($1) */
1190 MIPS32_SW(26, 26*4, 1), /* sw $26,26*4($1) */
1191 MIPS32_SW(27, 27*4, 1), /* sw $27,27*4($1) */
1192 MIPS32_SW(28, 28*4, 1), /* sw $28,28*4($1) */
1193 MIPS32_SW(29, 29*4, 1), /* sw $29,29*4($1) */
1194 MIPS32_SW(30, 30*4, 1), /* sw $30,30*4($1) */
1195 MIPS32_SW(31, 31*4, 1), /* sw $31,31*4($1) */
1197 MIPS32_MFC0(2, 12, 0), /* move status to $2 */
1198 MIPS32_SW(2, 32*4, 1), /* sw $2,32*4($1) */
1199 MIPS32_MFLO(2), /* move lo to $2 */
1200 MIPS32_SW(2, 33*4, 1), /* sw $2,33*4($1) */
1201 MIPS32_MFHI(2), /* move hi to $2 */
1202 MIPS32_SW(2, 34*4, 1), /* sw $2,34*4($1) */
1203 MIPS32_MFC0(2, 8, 0), /* move badvaddr to $2 */
1204 MIPS32_SW(2, 35*4, 1), /* sw $2,35*4($1) */
1205 MIPS32_MFC0(2, 13, 0), /* move cause to $2 */
1206 MIPS32_SW(2, 36*4, 1), /* sw $2,36*4($1) */
1207 MIPS32_MFC0(2, 24, 0), /* move depc (pc) to $2 */
1208 MIPS32_SW(2, 37*4, 1), /* sw $2,37*4($1) */
1210 MIPS32_LW(2, 0, 15), /* lw $2,($15) */
1211 MIPS32_LW(1, 0, 15), /* lw $1,($15) */
1212 MIPS32_B(NEG16(58)), /* b start */
1213 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
1218 retval
= mips32_pracc_exec(ejtag_info
, ARRAY_SIZE(code
), code
,
1219 0, NULL
, MIPS32NUMCOREREGS
, regs
, 1);
1224 /* fastdata upload/download requires an initialized working area
1225 * to load the download code; it should not be called otherwise
1226 * fetch order from the fastdata area
1231 int mips32_pracc_fastdata_xfer(struct mips_ejtag
*ejtag_info
, struct working_area
*source
,
1232 int write_t
, uint32_t addr
, int count
, uint32_t *buf
)
1234 uint32_t handler_code
[] = {
1235 /* caution when editing, table is modified below */
1236 /* r15 points to the start of this code */
1237 MIPS32_SW(8, MIPS32_FASTDATA_HANDLER_SIZE
- 4, 15),
1238 MIPS32_SW(9, MIPS32_FASTDATA_HANDLER_SIZE
- 8, 15),
1239 MIPS32_SW(10, MIPS32_FASTDATA_HANDLER_SIZE
- 12, 15),
1240 MIPS32_SW(11, MIPS32_FASTDATA_HANDLER_SIZE
- 16, 15),
1241 /* start of fastdata area in t0 */
1242 MIPS32_LUI(8, UPPER16(MIPS32_PRACC_FASTDATA_AREA
)),
1243 MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_FASTDATA_AREA
)),
1244 MIPS32_LW(9, 0, 8), /* start addr in t1 */
1245 MIPS32_LW(10, 0, 8), /* end addr to t2 */
1247 /* 8 */ MIPS32_LW(11, 0, 0), /* lw t3,[t8 | r9] */
1248 /* 9 */ MIPS32_SW(11, 0, 0), /* sw t3,[r9 | r8] */
1249 MIPS32_BNE(10, 9, NEG16(3)), /* bne $t2,t1,loop */
1250 MIPS32_ADDI(9, 9, 4), /* addi t1,t1,4 */
1252 MIPS32_LW(8, MIPS32_FASTDATA_HANDLER_SIZE
- 4, 15),
1253 MIPS32_LW(9, MIPS32_FASTDATA_HANDLER_SIZE
- 8, 15),
1254 MIPS32_LW(10, MIPS32_FASTDATA_HANDLER_SIZE
- 12, 15),
1255 MIPS32_LW(11, MIPS32_FASTDATA_HANDLER_SIZE
- 16, 15),
1257 MIPS32_LUI(15, UPPER16(MIPS32_PRACC_TEXT
)),
1258 MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_TEXT
)),
1259 MIPS32_JR(15), /* jr start */
1260 MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
1263 uint32_t jmp_code
[] = {
1264 MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
1265 /* 1 */ MIPS32_LUI(15, 0), /* addr of working area added below */
1266 /* 2 */ MIPS32_ORI(15, 15, 0), /* addr of working area added below */
1267 MIPS32_JR(15), /* jump to ram program */
1272 uint32_t val
, ejtag_ctrl
, address
;
1274 if (source
->size
< MIPS32_FASTDATA_HANDLER_SIZE
)
1275 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1278 handler_code
[8] = MIPS32_LW(11, 0, 8); /* load data from probe at fastdata area */
1279 handler_code
[9] = MIPS32_SW(11, 0, 9); /* store data to RAM @ r9 */
1281 handler_code
[8] = MIPS32_LW(11, 0, 9); /* load data from RAM @ r9 */
1282 handler_code
[9] = MIPS32_SW(11, 0, 8); /* store data to probe at fastdata area */
1285 /* write program into RAM */
1286 if (write_t
!= ejtag_info
->fast_access_save
) {
1287 mips32_pracc_write_mem32(ejtag_info
, source
->address
, ARRAY_SIZE(handler_code
), handler_code
);
1288 /* save previous operation to speed to any consecutive read/writes */
1289 ejtag_info
->fast_access_save
= write_t
;
1292 LOG_DEBUG("%s using 0x%.8" PRIx32
" for write handler", __func__
, source
->address
);
1294 jmp_code
[1] |= UPPER16(source
->address
);
1295 jmp_code
[2] |= LOWER16(source
->address
);
1297 for (i
= 0; i
< (int) ARRAY_SIZE(jmp_code
); i
++) {
1298 retval
= wait_for_pracc_rw(ejtag_info
, &ejtag_ctrl
);
1299 if (retval
!= ERROR_OK
)
1302 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_DATA
);
1303 mips_ejtag_drscan_32_out(ejtag_info
, jmp_code
[i
]);
1305 /* Clear the access pending bit (let the processor eat!) */
1306 ejtag_ctrl
= ejtag_info
->ejtag_ctrl
& ~EJTAG_CTRL_PRACC
;
1307 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_CONTROL
);
1308 mips_ejtag_drscan_32_out(ejtag_info
, ejtag_ctrl
);
1311 retval
= wait_for_pracc_rw(ejtag_info
, &ejtag_ctrl
);
1312 if (retval
!= ERROR_OK
)
1315 /* next fetch to dmseg should be in FASTDATA_AREA, check */
1317 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_ADDRESS
);
1318 retval
= mips_ejtag_drscan_32(ejtag_info
, &address
);
1319 if (retval
!= ERROR_OK
)
1322 if (address
!= MIPS32_PRACC_FASTDATA_AREA
)
1325 /* wait PrAcc pending bit for FASTDATA write */
1326 retval
= wait_for_pracc_rw(ejtag_info
, &ejtag_ctrl
);
1327 if (retval
!= ERROR_OK
)
1330 /* Send the load start address */
1332 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_FASTDATA
);
1333 mips_ejtag_fastdata_scan(ejtag_info
, 1, &val
);
1335 /* Send the load end address */
1336 val
= addr
+ (count
- 1) * 4;
1337 mips_ejtag_fastdata_scan(ejtag_info
, 1, &val
);
1339 for (i
= 0; i
< count
; i
++) {
1340 retval
= mips_ejtag_fastdata_scan(ejtag_info
, write_t
, buf
++);
1341 if (retval
!= ERROR_OK
)
1345 retval
= jtag_execute_queue();
1346 if (retval
!= ERROR_OK
) {
1347 LOG_ERROR("fastdata load failed");
1351 retval
= wait_for_pracc_rw(ejtag_info
, &ejtag_ctrl
);
1352 if (retval
!= ERROR_OK
)
1356 mips_ejtag_set_instr(ejtag_info
, EJTAG_INST_ADDRESS
);
1357 retval
= mips_ejtag_drscan_32(ejtag_info
, &address
);
1358 if (retval
!= ERROR_OK
)
1361 if (address
!= MIPS32_PRACC_TEXT
)
1362 LOG_ERROR("mini program did not return to start");