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1 | /* | |
2 | * (C) Copyright 2014,2018 Leo C. <erbl259-lmu@yahoo.de> | |
3 | * | |
4 | * (C) Copyright 2000 | |
5 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
6 | * | |
7 | * SPDX-License-Identifier: GPL-2.0 | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Memory Functions | |
12 | * | |
13 | * Copied from FADS ROM, Dan Malek (dmalek@jlc.net) | |
14 | */ | |
15 | ||
16 | #include "cmd_mem.h" | |
17 | #include <avr/interrupt.h> | |
18 | ||
19 | #include "cli_readline.h" | |
20 | #include "print-utils.h" | |
21 | #include "con-utils.h" | |
22 | #include "getopt-min.h" | |
23 | #include "eval_arg.h" | |
24 | #include "timer.h" | |
25 | #include "z80-if.h" | |
26 | #include "debug.h" | |
27 | ||
28 | ||
29 | #ifndef CONFIG_SYS_MEMTEST_SCRATCH | |
30 | #define CONFIG_SYS_MEMTEST_SCRATCH 0 | |
31 | #endif | |
32 | ||
33 | /* Display values from last command. | |
34 | * Memory modify remembered values are different from display memory. | |
35 | */ | |
36 | static uint32_t dp_last_addr; | |
37 | static uint32_t dp_last_length = 0x100; | |
38 | static uint32_t mm_last_addr; | |
39 | ||
40 | static uint32_t base_address = 0; | |
41 | ||
42 | /*--------------------------------------------------------------------------*/ | |
43 | ||
44 | static ERRNUM z180_read_buf(uint8_t *buf, uint32_t addr, uint8_t count) | |
45 | { | |
46 | if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) | |
47 | return EBUSTO; | |
48 | ||
49 | z80_read_block (buf, addr, count); | |
50 | z80_bus_cmd(Release); | |
51 | return ESUCCESS; | |
52 | } | |
53 | ||
54 | /*--------------------------------------------------------------------------*/ | |
55 | ||
56 | command_ret_t do_mem_size(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc UNUSED, char * const argv[] UNUSED) | |
57 | { | |
58 | int32_t ramsize = z80_memsize_detect(); | |
59 | ||
60 | if (ramsize < 0) | |
61 | cmd_error(CMD_RET_FAILURE, (ERRNUM) -ramsize, PSTR("Couldn't access RAM")); | |
62 | ||
63 | printf_P(PSTR("Detected RAM: Start %.5lx, End: %.5lx, Size: %.5lx (%ld dec)\n"), | |
64 | 0l, ramsize ? ramsize-1 : 0l, ramsize, ramsize); | |
65 | ||
66 | return CMD_RET_SUCCESS; | |
67 | } | |
68 | ||
69 | /* Memory Display | |
70 | * | |
71 | * Syntax: | |
72 | * md {addr} {len} | |
73 | */ | |
74 | command_ret_t do_mem_md(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
75 | { | |
76 | uint32_t addr, length; | |
77 | ||
78 | (void) cmdtp; | |
79 | ||
80 | #if 0 | |
81 | printf_P(PSTR("flag: %d, argc: %d"), flag, argc); | |
82 | for (int i = 0; i < argc; i++) { | |
83 | printf_P(PSTR(", argv[%d]: %s"), i, argv[i] ? argv[i] : "<NULL>"); | |
84 | } | |
85 | putchar('\n'); | |
86 | #endif | |
87 | ||
88 | /* We use the last specified parameters, unless new ones are | |
89 | * entered. | |
90 | */ | |
91 | addr = dp_last_addr; | |
92 | length = dp_last_length; | |
93 | ||
94 | if (argc < 2) | |
95 | return CMD_RET_USAGE; | |
96 | ||
97 | if ((flag & CMD_FLAG_REPEAT) == 0) { | |
98 | /* Address is specified since argc > 1 */ | |
99 | addr = eval_arg(argv[1], NULL); | |
100 | addr += base_address; | |
101 | ||
102 | /* If another parameter, it is the length to display. */ | |
103 | if (argc > 2) | |
104 | length = eval_arg(argv[2], NULL); | |
105 | } | |
106 | ||
107 | /* Print the lines. */ | |
108 | ERRNUM ret = dump_mem(addr, addr, length, z180_read_buf, NULL); | |
109 | if (ret == EBUSTO) | |
110 | cmd_error(CMD_RET_FAILURE, ret, NULL); | |
111 | ||
112 | if (ret == ESUCCESS) { | |
113 | dp_last_addr = addr + length; | |
114 | dp_last_length = length; | |
115 | } | |
116 | return CMD_RET_SUCCESS; | |
117 | } | |
118 | ||
119 | /* Modify memory. | |
120 | * | |
121 | * Syntax: | |
122 | * mm {addr} | |
123 | * nm {addr} | |
124 | */ | |
125 | static command_ret_t | |
126 | mod_mem(cmd_tbl_t *cmdtp, int incrflag, uint_fast8_t flag, int argc, char * const argv[]) | |
127 | { | |
128 | uint32_t addr; | |
129 | uint8_t data; | |
130 | int nbytes; | |
131 | ||
132 | (void) cmdtp; | |
133 | ||
134 | if (argc != 2) | |
135 | return CMD_RET_USAGE; | |
136 | ||
137 | /* We use the last specified parameters, unless new ones are | |
138 | * entered. | |
139 | */ | |
140 | addr = mm_last_addr; | |
141 | ||
142 | if ((flag & CMD_FLAG_REPEAT) == 0) { | |
143 | /* New command specified. | |
144 | */ | |
145 | ||
146 | /* Address is specified since argc > 1 | |
147 | */ | |
148 | addr = eval_arg(argv[1], NULL); | |
149 | addr += base_address; | |
150 | } | |
151 | ||
152 | /* Print the address, followed by value. Then accept input for | |
153 | * the next value. A non-converted value exits. | |
154 | */ | |
155 | do { | |
156 | z80_bus_request_or_exit(); | |
157 | data = z80_read(addr); | |
158 | z80_bus_cmd(Release); | |
159 | printf_P(PSTR("%05lx: %02x"), addr, data); | |
160 | ||
161 | nbytes = cli_readline(PSTR(" ? "), 0); | |
162 | if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) { | |
163 | /* <CR> pressed as only input, don't modify current | |
164 | * location and move to next. "-" pressed will go back. | |
165 | */ | |
166 | if (incrflag) | |
167 | addr += nbytes ? -1 : 1; | |
168 | nbytes = 1; | |
169 | ||
170 | } else { | |
171 | char *endp; | |
172 | data = eval_arg(console_buffer, &endp); | |
173 | nbytes = endp - console_buffer; | |
174 | if (nbytes) { | |
175 | z80_bus_request_or_exit(); | |
176 | z80_write(addr, data); | |
177 | z80_bus_cmd(Release); | |
178 | if (incrflag) | |
179 | addr++; | |
180 | } | |
181 | } | |
182 | } while (nbytes > 0); | |
183 | ||
184 | mm_last_addr = addr; | |
185 | return CMD_RET_SUCCESS; | |
186 | } | |
187 | ||
188 | ||
189 | command_ret_t do_mem_mm(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
190 | { | |
191 | return mod_mem (cmdtp, 1, flag, argc, argv); | |
192 | } | |
193 | command_ret_t do_mem_nm(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
194 | { | |
195 | return mod_mem (cmdtp, 0, flag, argc, argv); | |
196 | } | |
197 | ||
198 | command_ret_t do_mem_mw(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
199 | { | |
200 | uint32_t writeval; | |
201 | uint32_t addr; | |
202 | uint32_t count = 1; | |
203 | uint_fast8_t width = 1; | |
204 | ||
205 | (void) cmdtp; (void) flag; | |
206 | ||
207 | /* reset getopt() */ | |
208 | optind = 0; | |
209 | ||
210 | int opt; | |
211 | while ((opt = getopt(argc, argv, PSTR("bwl"))) != -1) { | |
212 | switch (opt) { | |
213 | case 'b': | |
214 | width = 1; | |
215 | break; | |
216 | case 'w': | |
217 | width = 2; | |
218 | break; | |
219 | case 'l': | |
220 | width = 4; | |
221 | break; | |
222 | default: /* '?' */ | |
223 | return CMD_RET_USAGE; | |
224 | } | |
225 | } | |
226 | ||
227 | /* remaining arguments */ | |
228 | argc -= optind; | |
229 | if ((argc < 2) || (argc > 3)) | |
230 | return CMD_RET_USAGE; | |
231 | ||
232 | /* Address and value are specified since (adjusted) argc >= 2 */ | |
233 | addr = eval_arg(argv[optind++], NULL); | |
234 | addr += base_address; | |
235 | writeval = eval_arg(argv[optind++], NULL); | |
236 | ||
237 | /* Count ? */ | |
238 | if (argc == 3) | |
239 | count = eval_arg(argv[optind], NULL); | |
240 | ||
241 | z80_bus_request_or_exit(); | |
242 | if (width == 1) | |
243 | z80_memset(addr, writeval, count); | |
244 | else { | |
245 | while (count--) { | |
246 | z80_write_block((const uint8_t *) &writeval, addr, width); | |
247 | addr += width; | |
248 | } | |
249 | } | |
250 | z80_bus_cmd(Release); | |
251 | ||
252 | return CMD_RET_SUCCESS; | |
253 | } | |
254 | ||
255 | #ifdef CONFIG_MX_CYCLIC | |
256 | command_ret_t do_mem_mdc ( cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
257 | { | |
258 | uint32_t count; | |
259 | uint32_t ts; | |
260 | ||
261 | (void) cmdtp; | |
262 | (void) flag; | |
263 | ||
264 | optind = 0; | |
265 | if (argv[0][1] != 'd') { | |
266 | int opt; | |
267 | while ((opt = getopt(argc, argv, PSTR("bwl"))) != -1) | |
268 | if (opt == '?') | |
269 | return CMD_RET_USAGE; | |
270 | --optind; | |
271 | } | |
272 | ||
273 | if (argc-optind != 4) | |
274 | return CMD_RET_USAGE; | |
275 | ||
276 | count = eval_arg(argv[optind + 3], NULL); | |
277 | ||
278 | clear_ctrlc(); /* forget any previous Control C */ | |
279 | for (;;) { | |
280 | ||
281 | if (argv[0][1] == 'd') | |
282 | do_mem_md (NULL, 0, argc-1, argv); /* memory display */ | |
283 | else | |
284 | do_mem_mw (NULL, 0, argc-1, argv); /* memory write */ | |
285 | ||
286 | ||
287 | /* delay for <count> ms... */ | |
288 | ts = get_timer(0); | |
289 | do { | |
290 | /* check for ctrl-c to abort... */ | |
291 | if (had_ctrlc() || ctrlc()) { | |
292 | my_puts_P(PSTR("Abort\n")); | |
293 | return CMD_RET_SUCCESS; | |
294 | } | |
295 | } while (get_timer(ts) < count); | |
296 | } | |
297 | ||
298 | return CMD_RET_SUCCESS; | |
299 | } | |
300 | #endif /* CONFIG_MX_CYCLIC */ | |
301 | ||
302 | command_ret_t do_mem_cmp(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
303 | { | |
304 | uint32_t addr1, addr2, count, ngood; | |
305 | command_ret_t rcode = CMD_RET_SUCCESS; | |
306 | uint8_t byte1, byte2; | |
307 | ||
308 | (void) cmdtp; | |
309 | (void) flag; | |
310 | ||
311 | if (argc != 4) | |
312 | return CMD_RET_USAGE; | |
313 | ||
314 | ||
315 | addr1 = eval_arg(argv[1], NULL); | |
316 | addr1 += base_address; | |
317 | addr2 = eval_arg(argv[2], NULL); | |
318 | addr2 += base_address; | |
319 | count = eval_arg(argv[3], NULL); | |
320 | ||
321 | for (ngood = 0; ngood < count; ++ngood) { | |
322 | if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { | |
323 | my_puts_P(PSTR("Bus timeout\n")); | |
324 | rcode = CMD_RET_FAILURE; | |
325 | break; | |
326 | } | |
327 | byte1 = z80_read(addr1); | |
328 | byte2 = z80_read(addr2); | |
329 | z80_bus_cmd(Release); | |
330 | if (byte1 != byte2) { | |
331 | printf_P(PSTR("byte at 0x%05lx (%#02x) != " | |
332 | "byte at 0x%05lx (%#02x)\n"), | |
333 | addr1, byte1, addr2, byte2); | |
334 | rcode = CMD_RET_FAILURE; | |
335 | break; | |
336 | } | |
337 | addr1++; | |
338 | addr2++; | |
339 | ||
340 | /* check for ctrl-c to abort... */ | |
341 | if (ctrlc()) { | |
342 | my_puts_P(PSTR("Abort\n")); | |
343 | return CMD_RET_SUCCESS; | |
344 | } | |
345 | } | |
346 | ||
347 | printf_P(PSTR("Total of %ld byte(s) (0x%lx) were the same\n"), ngood, ngood); | |
348 | return rcode; | |
349 | } | |
350 | ||
351 | command_ret_t do_mem_cp(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
352 | { | |
353 | uint32_t src, dest, count; | |
354 | int_fast8_t step; | |
355 | ||
356 | (void) cmdtp; | |
357 | (void) flag; | |
358 | ||
359 | if (argc != 4) | |
360 | return CMD_RET_USAGE; | |
361 | ||
362 | src = eval_arg(argv[1], NULL); | |
363 | src += base_address; | |
364 | dest = eval_arg(argv[2], NULL); | |
365 | dest += base_address; | |
366 | count = eval_arg(argv[3], NULL); | |
367 | ||
368 | if (count == 0) { | |
369 | my_puts_P(PSTR("Zero length?\n")); | |
370 | return CMD_RET_FAILURE; | |
371 | } | |
372 | ||
373 | if (dest > src) { | |
374 | src += count - 1; | |
375 | dest += count - 1; | |
376 | step = -1; | |
377 | } else | |
378 | step = 1; | |
379 | ||
380 | while (count-- > 0) { | |
381 | uint8_t data; | |
382 | z80_bus_request_or_exit(); | |
383 | data = z80_read(src); | |
384 | z80_write(dest, data); | |
385 | z80_bus_cmd(Release); | |
386 | src += step; | |
387 | dest += step; | |
388 | ||
389 | /* check for ctrl-c to abort... */ | |
390 | if (ctrlc()) { | |
391 | my_puts_P(PSTR("Abort\n")); | |
392 | return CMD_RET_SUCCESS; | |
393 | } | |
394 | } | |
395 | return CMD_RET_SUCCESS; | |
396 | } | |
397 | ||
398 | command_ret_t do_mem_base(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, | |
399 | char * const argv[]) | |
400 | { | |
401 | (void) cmdtp; | |
402 | (void) flag; | |
403 | ||
404 | if (argc > 1) { | |
405 | /* Set new base address. */ | |
406 | base_address = eval_arg(argv[1], NULL); | |
407 | } | |
408 | /* Print the current base address. */ | |
409 | printf_P(PSTR("Base Address: 0x%05lx\n"), base_address); | |
410 | return CMD_RET_SUCCESS; | |
411 | } | |
412 | ||
413 | command_ret_t do_mem_loop(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, | |
414 | char * const argv[]) | |
415 | { | |
416 | uint32_t addr, length; | |
417 | ||
418 | (void) cmdtp; | |
419 | (void) flag; | |
420 | ||
421 | if (argc < 3) | |
422 | return CMD_RET_USAGE; | |
423 | ||
424 | /* Address is always specified. */ | |
425 | addr = eval_arg(argv[1], NULL); | |
426 | ||
427 | /* Length is the number of bytes. */ | |
428 | length = eval_arg(argv[2], NULL); | |
429 | ||
430 | ||
431 | /* We want to optimize the loops to run as fast as possible. | |
432 | * If we have only one object, just run infinite loops. | |
433 | */ | |
434 | if (length == 1) { | |
435 | z80_bus_request_or_exit(); | |
436 | cli(); | |
437 | for (;;) | |
438 | z80_read(addr); | |
439 | } | |
440 | ||
441 | z80_bus_request_or_exit(); | |
442 | cli(); | |
443 | for (;;) { | |
444 | uint32_t i = length; | |
445 | uint32_t p = addr; | |
446 | while (i-- > 0) | |
447 | z80_read(p++); | |
448 | } | |
449 | ||
450 | return CMD_RET_SUCCESS; | |
451 | } | |
452 | ||
453 | command_ret_t do_mem_loopw (cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[]) | |
454 | { | |
455 | uint32_t addr, length; | |
456 | uint8_t data; | |
457 | ||
458 | (void) cmdtp; | |
459 | (void) flag; | |
460 | ||
461 | if (argc < 4) | |
462 | return CMD_RET_USAGE; | |
463 | ||
464 | /* Address is always specified. */ | |
465 | addr = eval_arg(argv[1], NULL); | |
466 | ||
467 | /* Length is the number of bytes. */ | |
468 | length = eval_arg(argv[2], NULL); | |
469 | ||
470 | data = eval_arg(argv[3], NULL); | |
471 | ||
472 | /* | |
473 | * We want to optimize the loops to run as fast as possible. | |
474 | * If we have only one object, just run infinite loops. | |
475 | */ | |
476 | if (length == 1) { | |
477 | z80_bus_request_or_exit(); | |
478 | cli(); | |
479 | for (;;) | |
480 | z80_write(addr, data); | |
481 | } | |
482 | ||
483 | z80_bus_request_or_exit(); | |
484 | cli(); | |
485 | for (;;) { | |
486 | uint32_t i = length; | |
487 | uint32_t p = addr; | |
488 | while (i-- > 0) | |
489 | z80_write(p++, data); | |
490 | } | |
491 | } | |
492 | ||
493 | //#define CONFIG_SYS_ALT_MEMTEST | |
494 | ||
495 | #ifdef CONFIG_CMD_MEMTEST | |
496 | static uint32_t mem_test_alt(uint32_t start_addr, uint32_t end_addr) | |
497 | { | |
498 | uint32_t addr; | |
499 | uint32_t dummy; | |
500 | uint32_t errs = 0; | |
501 | uint32_t offset; | |
502 | uint32_t test_offset; | |
503 | uint8_t pattern; | |
504 | uint8_t anti_pattern; | |
505 | uint8_t temp; | |
506 | uint32_t num_bytes; | |
507 | ||
508 | static const FLASH uint8_t bitpattern[] = { | |
509 | 0x01, /* single bit */ | |
510 | 0x03, /* two adjacent bits */ | |
511 | 0x07, /* three adjacent bits */ | |
512 | 0x0F, /* four adjacent bits */ | |
513 | 0x05, /* two non-adjacent bits */ | |
514 | 0x15, /* three non-adjacent bits */ | |
515 | 0x55, /* four non-adjacent bits */ | |
516 | 0xaa, /* alternating 1/0 */ | |
517 | }; | |
518 | ||
519 | /* | |
520 | * Data line test: write a pattern to the first | |
521 | * location, write the 1's complement to a 'parking' | |
522 | * address (changes the state of the data bus so a | |
523 | * floating bus doesn't give a false OK), and then | |
524 | * read the value back. Note that we read it back | |
525 | * into a variable because the next time we read it, | |
526 | * it might be right (been there, tough to explain to | |
527 | * the quality guys why it prints a failure when the | |
528 | * "is" and "should be" are obviously the same in the | |
529 | * error message). | |
530 | * | |
531 | * Rather than exhaustively testing, we test some | |
532 | * patterns by shifting '1' bits through a field of | |
533 | * '0's and '0' bits through a field of '1's (i.e. | |
534 | * pattern and ~pattern). | |
535 | */ | |
536 | addr = start_addr; | |
537 | dummy = start_addr+1; | |
538 | for (unsigned int j = 0; j < ARRAY_SIZE(bitpattern); j++) { | |
539 | pattern = bitpattern[j]; | |
540 | for (; pattern != 0; pattern <<= 1) { | |
541 | anti_pattern = ~pattern; | |
542 | z80_write(addr, pattern); | |
543 | z80_write(dummy, anti_pattern); /* clear the test data off the bus */ | |
544 | temp = z80_read(addr); | |
545 | if (temp != pattern) { | |
546 | printf_P(PSTR("FAILURE (data line): " | |
547 | "expected %02x, actual %02x\n"), | |
548 | pattern, temp); | |
549 | errs++; | |
550 | } | |
551 | z80_write(addr, anti_pattern); | |
552 | z80_write(dummy, pattern); /* clear the test data off the bus */ | |
553 | temp = z80_read(addr); | |
554 | if (temp != anti_pattern) { | |
555 | printf_P(PSTR("FAILURE (data line): " | |
556 | "Is %02x, should be %02x\n"), | |
557 | temp, anti_pattern); | |
558 | errs++; | |
559 | } | |
560 | } | |
561 | ||
562 | if (ctrlc()) | |
563 | return -1; | |
564 | } | |
565 | ||
566 | if (errs) | |
567 | return errs; | |
568 | ||
569 | /* | |
570 | * Based on code whose Original Author and Copyright | |
571 | * information follows: Copyright (c) 1998 by Michael | |
572 | * Barr. This software is placed into the public | |
573 | * domain and may be used for any purpose. However, | |
574 | * this notice must not be changed or removed and no | |
575 | * warranty is either expressed or implied by its | |
576 | * publication or distribution. | |
577 | */ | |
578 | ||
579 | /* | |
580 | * Address line test | |
581 | ||
582 | * Description: Test the address bus wiring in a | |
583 | * memory region by performing a walking | |
584 | * 1's test on the relevant bits of the | |
585 | * address and checking for aliasing. | |
586 | * This test will find single-bit | |
587 | * address failures such as stuck-high, | |
588 | * stuck-low, and shorted pins. The base | |
589 | * address and size of the region are | |
590 | * selected by the caller. | |
591 | ||
592 | * Notes: For best results, the selected base | |
593 | * address should have enough LSB 0's to | |
594 | * guarantee single address bit changes. | |
595 | * For example, to test a 64-Kbyte | |
596 | * region, select a base address on a | |
597 | * 64-Kbyte boundary. Also, select the | |
598 | * region size as a power-of-two if at | |
599 | * all possible. | |
600 | * | |
601 | * Returns: 0 if the test succeeds, 1 if the test fails. | |
602 | */ | |
603 | ||
604 | num_bytes = (end_addr - start_addr) / sizeof(uint8_t); | |
605 | ||
606 | pattern = 0xaa; | |
607 | anti_pattern = 0x55; | |
608 | ||
609 | // debug("## %s:%d: length = 0x%.5lx\n", __func__, __LINE__, num_bytes); | |
610 | /* | |
611 | * Write the default pattern at each of the | |
612 | * power-of-two offsets. | |
613 | */ | |
614 | for (offset = 1; offset < num_bytes; offset <<= 1) | |
615 | z80_write(addr+offset, pattern); | |
616 | ||
617 | /* | |
618 | * Check for address bits stuck high. | |
619 | */ | |
620 | z80_write(start_addr, anti_pattern); | |
621 | ||
622 | for (offset = 1; offset < num_bytes; offset <<= 1) { | |
623 | temp = z80_read(start_addr + offset); | |
624 | if (temp != pattern) { | |
625 | printf_P(PSTR("FAILURE: Address bit stuck high @ 0x%.5lx:" | |
626 | " expected 0x%.2x, actual 0x%.2x\n"), | |
627 | start_addr + offset, pattern, temp); | |
628 | errs++; | |
629 | if (ctrlc()) | |
630 | return -1; | |
631 | } | |
632 | } | |
633 | z80_write(start_addr, pattern); | |
634 | ||
635 | /* | |
636 | * Check for addr bits stuck low or shorted. | |
637 | */ | |
638 | for (test_offset = 1; test_offset < num_bytes; test_offset <<= 1) { | |
639 | z80_write(start_addr + test_offset, anti_pattern); | |
640 | ||
641 | for (offset = 1; offset < num_bytes; offset <<= 1) { | |
642 | temp = z80_read(start_addr + offset); | |
643 | if ((temp != pattern) && (offset != test_offset)) { | |
644 | printf_P(PSTR("FAILURE: Address bit stuck low or shorted" | |
645 | " @ 0x%.5lx: expected 0x%.2x, actual 0x%.2x\n"), | |
646 | start_addr + offset, pattern, temp); | |
647 | errs++; | |
648 | if (ctrlc()) | |
649 | return -1; | |
650 | } | |
651 | } | |
652 | z80_write(start_addr + test_offset, pattern); | |
653 | } | |
654 | ||
655 | if (errs) | |
656 | return errs; | |
657 | ||
658 | /* | |
659 | * Description: Test the integrity of a physical | |
660 | * memory device by performing an | |
661 | * increment/decrement test over the | |
662 | * entire region. In the process every | |
663 | * storage bit in the device is tested | |
664 | * as a zero and a one. The base address | |
665 | * and the size of the region are | |
666 | * selected by the caller. | |
667 | * | |
668 | * Returns: 0 if the test succeeds, 1 if the test fails. | |
669 | */ | |
670 | num_bytes++; | |
671 | ||
672 | /* | |
673 | * Fill memory with a known pattern. | |
674 | */ | |
675 | for (pattern = 1, addr = start_addr; addr <= end_addr; pattern++, addr++) | |
676 | z80_write(addr, pattern); | |
677 | ||
678 | /* | |
679 | * Check each location and invert it for the second pass. | |
680 | */ | |
681 | for (pattern = 1, addr = start_addr; addr <= end_addr; pattern++, addr++) { | |
682 | temp = z80_read(addr); | |
683 | if (temp != pattern) { | |
684 | printf_P(PSTR("FAILURE (read/write) @ 0x%.5lx:" | |
685 | " expected 0x%.2x, actual 0x%.2x)\n"), | |
686 | addr, pattern, temp); | |
687 | errs++; | |
688 | if (ctrlc()) | |
689 | return -1; | |
690 | } | |
691 | ||
692 | anti_pattern = ~pattern; | |
693 | z80_write(addr, anti_pattern); | |
694 | } | |
695 | ||
696 | /* | |
697 | * Check each location for the inverted pattern and zero it. | |
698 | */ | |
699 | for (pattern = 1, addr = start_addr; addr <= end_addr; pattern++, addr++) { | |
700 | anti_pattern = ~pattern; | |
701 | temp = z80_read(addr); | |
702 | if (temp != anti_pattern) { | |
703 | printf_P(PSTR("FAILURE (read/write) @ 0x%.5lx:" | |
704 | " expected 0x%.2x, actual 0x%.2x)\n"), | |
705 | start_addr, anti_pattern, temp); | |
706 | errs++; | |
707 | if (ctrlc()) | |
708 | return -1; | |
709 | } | |
710 | z80_write(addr, 0); | |
711 | } | |
712 | ||
713 | return errs; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Perform a memory test. A more complete alternative test can be | |
718 | * configured using CONFIG_SYS_ALT_MEMTEST. The complete test loops until | |
719 | * interrupted by ctrl-c or by a failure of one of the sub-tests. | |
720 | */ | |
721 | command_ret_t do_mem_mtest(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, | |
722 | char * const argv[]) | |
723 | { | |
724 | uint32_t start = 0; | |
725 | uint32_t end; | |
726 | unsigned int iteration_limit = 0; | |
727 | unsigned int iteration; | |
728 | uint32_t errs = 0; /* number of errors */ | |
729 | int ret; | |
730 | ||
731 | (void) cmdtp; | |
732 | (void) flag; | |
733 | ||
734 | if (argc > 1) | |
735 | start = eval_arg(argv[1], NULL); | |
736 | ||
737 | if (argc > 2) | |
738 | end = eval_arg(argv[2], NULL); | |
739 | else | |
740 | end = CONFIG_SYS_RAMSIZE_MAX - 1; | |
741 | ||
742 | if (argc > 3) | |
743 | iteration_limit = (unsigned int) eval_arg(argv[3], NULL); | |
744 | ||
745 | printf_P(PSTR("Testing %05lx ... %05lx:\n"), start, end); | |
746 | // debug("## %s:%d: start %#05lx end %#05lx\n", __func__, __LINE__, start, end); | |
747 | ||
748 | clear_ctrlc(); /* forget any previous Control C */ | |
749 | ||
750 | for (iteration = 0; | |
751 | !iteration_limit || iteration < iteration_limit; | |
752 | iteration++) { | |
753 | ||
754 | printf_P(PSTR("Iteration: %6d\r"), iteration + 1); | |
755 | // debug("\n"); | |
756 | ||
757 | z80_bus_request_or_exit(); | |
758 | errs += mem_test_alt(start, end); | |
759 | z80_bus_cmd(Release); | |
760 | ||
761 | if (had_ctrlc() || ctrlc()) { | |
762 | break; | |
763 | } | |
764 | } | |
765 | ||
766 | if (had_ctrlc()) { | |
767 | /* Memory test was aborted - write a newline to finish off */ | |
768 | putchar('\n'); | |
769 | ret = CMD_RET_FAILURE; | |
770 | } else { | |
771 | printf_P(PSTR("Tested %d iteration(s) with %lu errors.\n"), | |
772 | iteration, errs); | |
773 | ret = errs ? CMD_RET_FAILURE : CMD_RET_SUCCESS; | |
774 | } | |
775 | ||
776 | return ret; | |
777 | } | |
778 | #endif /* CONFIG_CMD_MEMTEST */ |