summaryrefslogtreecommitdiff
path: root/board/svm_sc8xx/flash.c
blob: b3893ef5f442476111a877e82b2644a1282b8653 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
/*
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <mpc8xx.h>

#ifndef	CONFIG_ENV_ADDR
#define CONFIG_ENV_ADDR	(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
#endif

flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

/*-----------------------------------------------------------------------
 * Functions
 */
static int write_word(flash_info_t *info, ulong dest, ulong data);

#ifdef CONFIG_BOOT_8B
static int my_in_8(unsigned char *addr);
static void my_out_8(unsigned char *addr, int val);
#endif
#ifdef CONFIG_BOOT_16B
static int my_in_be16(unsigned short *addr);
static void my_out_be16(unsigned short *addr, int val);
#endif
#ifdef CONFIG_BOOT_32B
static unsigned my_in_be32(unsigned *addr);
static void my_out_be32(unsigned *addr, int val);
#endif
/*-----------------------------------------------------------------------
 */

unsigned long flash_init(void)
{
	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long size_b0, size_b1;
	int i;

	size_b0 = 0;
	size_b1 = 0;
	/* Init: no FLASHes known */
	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
		flash_info[i].flash_id = FLASH_UNKNOWN;

#ifdef CONFIG_SYS_DOC_BASE
#ifndef CONFIG_FEL8xx_AT
	/* 32k bytes */
	memctl->memc_or5 = (0xffff8000 | CONFIG_SYS_OR_TIMING_DOC);
	memctl->memc_br5 = CONFIG_SYS_DOC_BASE | 0x401;
#else
	/* 32k bytes */
	memctl->memc_or3 = (0xffff8000 | CONFIG_SYS_OR_TIMING_DOC);
	memctl->memc_br3 = CONFIG_SYS_DOC_BASE | 0x401;
#endif
#endif
#if defined(CONFIG_BOOT_8B)
	size_b0 = 0x80000;	/* 512 K */

	flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM040;
	flash_info[0].sector_count = 8;
	flash_info[0].size = 0x00080000;

	/* set up sector start address table */
	for (i = 0; i < flash_info[0].sector_count; i++)
		flash_info[0].start[i] = 0x40000000 + (i * 0x10000);

	/* protect all sectors */
	for (i = 0; i < flash_info[0].sector_count; i++)
		flash_info[0].protect[i] = 0x1;

#elif defined(CONFIG_BOOT_16B)
	size_b0 = 0x400000;	/* 4MB , assume AMD29LV320B */

	flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM320B;
	flash_info[0].sector_count = 67;
	flash_info[0].size = 0x00400000;

	/* set up sector start address table */
	flash_info[0].start[0] = 0x40000000;
	flash_info[0].start[1] = 0x40000000 + 0x4000;
	flash_info[0].start[2] = 0x40000000 + 0x6000;
	flash_info[0].start[3] = 0x40000000 + 0x8000;

	for (i = 4; i < flash_info[0].sector_count; i++) {
		flash_info[0].start[i] =
			0x40000000 + 0x10000 + ((i - 4) * 0x10000);
	}

	/* protect all sectors */
	for (i = 0; i < flash_info[0].sector_count; i++)
		flash_info[0].protect[i] = 0x1;
#endif

#ifdef CONFIG_BOOT_32B

	/* Static FLASH Bank configuration here - FIXME XXX */
	size_b0 = flash_get_size((vu_long *) FLASH_BASE0_PRELIM,
			       &flash_info[0]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0 << 20);
	}

	size_b1 = flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
			       &flash_info[1]);

	if (size_b1 > size_b0) {
		printf("## ERROR: "
			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
			size_b1, size_b1 << 20, size_b0, size_b0 << 20);
		flash_info[0].flash_id = FLASH_UNKNOWN;
		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[0].sector_count = -1;
		flash_info[1].sector_count = -1;
		flash_info[0].size = 0;
		flash_info[1].size = 0;

		return 0;
	}

	/* Remap FLASH according to real size */
	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH |
				(-size_b0 & OR_AM_MSK);
	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) |
				BR_MS_GPCM | BR_V;

	/* Re-do sizing to get full correct info */
	size_b0 = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE,
				&flash_info[0]);

	flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);

#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		CONFIG_SYS_MONITOR_BASE,
		CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
		&flash_info[0]);
#endif

#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		CONFIG_ENV_ADDR,
		CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
#endif

	if (size_b1) {
		memctl->memc_or1 = CONFIG_SYS_OR_TIMING_FLASH |
			(-size_b1 & 0xFFFF8000);
		memctl->memc_br1 = ((CONFIG_SYS_FLASH_BASE +
			size_b0) & BR_BA_MSK) | BR_MS_GPCM | BR_V;

		/* Re-do sizing to get full correct info */
		size_b1 = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE +
					size_b0), &flash_info[1]);

		flash_get_offsets(CONFIG_SYS_FLASH_BASE + size_b0,
				  &flash_info[1]);

#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
		/* monitor protection ON by default */
		flash_protect(FLAG_PROTECT_SET,
			      CONFIG_SYS_MONITOR_BASE,
			      CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
			      &flash_info[1]);
#endif

#ifdef	CONFIG_ENV_IS_IN_FLASH
		/* ENV protection ON by default */
		flash_protect(FLAG_PROTECT_SET,
			      CONFIG_ENV_ADDR,
			      CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
			      &flash_info[1]);
#endif
	} else {
		memctl->memc_br1 = 0;	/* invalidate bank */

		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[1].sector_count = -1;
	}

	flash_info[0].size = size_b0;
	flash_info[1].size = size_b1;


#endif /* CONFIG_BOOT_32B */

	return size_b0 + size_b1;
}


void flash_print_info(flash_info_t *info)
{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) {
		printf("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:
		printf("AMD ");
		break;
	case FLASH_MAN_FUJ:
		printf("FUJITSU ");
		break;
	default:
		printf("Unknown Vendor ");
		break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM400B:
		printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM400T:
		printf("AM29LV400T (4 Mbit, top boot sector)\n");
		break;
	case FLASH_AM800B:
		printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM800T:
		printf("AM29LV800T (8 Mbit, top boot sector)\n");
		break;
	case FLASH_AM160B:
		printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM160T:
		printf("AM29LV160T (16 Mbit, top boot sector)\n");
		break;
	case FLASH_AM320B:
		printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM320T:
		printf("AM29LV320T (32 Mbit, top boot sector)\n");
		break;
	default:
		printf("Unknown Chip Type\n");
		break;
	}

	printf("  Size: %ld MB in %d Sectors\n",
		info->size >> 20, info->sector_count);

	printf("  Sector Start Addresses:");
	for (i = 0; i < info->sector_count; ++i) {
		if ((i % 5) == 0)
			printf("\n   ");
		printf(" %08lX%s",
		       info->start[i], info->protect[i] ? " (RO)" : "     ");
	}
	printf("\n");
	return;
}

/*
 * The following code cannot be run from FLASH!
 */

int flash_erase(flash_info_t *info, int s_first, int s_last)
{
	vu_long *addr = (vu_long *) (info->start[0]);
	int flag, prot, sect, l_sect, in_mid, in_did;
	ulong start, now, last;

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN)
			printf("- missing\n");
		else
			printf("- no sectors to erase\n");

		return 1;
	}

	if ((info->flash_id == FLASH_UNKNOWN) ||
	    (info->flash_id > FLASH_AMD_COMP)) {
		printf("Can't erase unknown flash type %08lx - aborted\n",
		       info->flash_id);
		return 1;
	}

	prot = 0;
	for (sect = s_first; sect <= s_last; ++sect) {
		if (info->protect[sect])
			prot++;
	}

	if (prot) {
		printf("- Warning: %d protected sectors will not be erased!\n",
			prot);
	} else {
		printf("\n");
	}

	l_sect = -1;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

#if defined(CONFIG_BOOT_8B)
	my_out_8((unsigned char *)((ulong)addr + 0x555), 0xaa);
	my_out_8((unsigned char *)((ulong)addr + 0x2aa), 0x55);
	my_out_8((unsigned char *)((ulong)addr + 0x555), 0x90);

	in_mid = my_in_8((unsigned char *)addr);
	in_did = my_in_8((unsigned char *)((ulong)addr + 1));

	printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);

	my_out_8((unsigned char *)addr, 0xf0);
	udelay(1);

	my_out_8((unsigned char *)((ulong)addr + 0x555), 0xaa);
	my_out_8((unsigned char *)((ulong)addr + 0x2aa), 0x55);
	my_out_8((unsigned char *)((ulong)addr + 0x555), 0x80);
	my_out_8((unsigned char *)((ulong)addr + 0x555), 0xaa);
	my_out_8((unsigned char *)((ulong)addr + 0x2aa), 0x55);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_long *) (info->start[sect]);
			/*addr[0] = 0x00300030; */
			my_out_8((unsigned char *)((ulong)addr), 0x30);
			l_sect = sect;
		}
	}
#elif defined(CONFIG_BOOT_16B)
	my_out_be16((unsigned short *)((ulong)addr + (0xaaa)), 0xaa);
	my_out_be16((unsigned short *)((ulong)addr + (0x554)), 0x55);
	my_out_be16((unsigned short *)((ulong)addr + (0xaaa)), 0x90);
	in_mid = my_in_be16((unsigned short *)addr);
	in_did = my_in_be16((unsigned short *)((ulong)addr + 2));
	printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);
	my_out_be16((unsigned short *)addr, 0xf0);
	udelay(1);
	my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xaa);
	my_out_be16((unsigned short *)((ulong)addr + 0x554), 0x55);
	my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0x80);
	my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xaa);
	my_out_be16((unsigned short *)((ulong)addr + 0x554), 0x55);
	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_long *) (info->start[sect]);
			my_out_be16((unsigned short *)((ulong)addr), 0x30);
			l_sect = sect;
		}
	}

#elif defined(CONFIG_BOOT_32B)
	my_out_be32((unsigned *)((ulong)addr + 0x1554), 0xaa);
	my_out_be32((unsigned *)((ulong)addr + 0xaa8), 0x55);
	my_out_be32((unsigned *)((ulong)addr + 0x1554), 0x90);

	in_mid = my_in_be32((unsigned *)addr);
	in_did = my_in_be32((unsigned *)((ulong)addr + 4));

	printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);

	my_out_be32((unsigned *) addr, 0xf0);
	udelay(1);

	my_out_be32((unsigned *)((ulong)addr + 0x1554), 0xaa);
	my_out_be32((unsigned *)((ulong)addr + 0xaa8), 0x55);
	my_out_be32((unsigned *)((ulong)addr + 0x1554), 0x80);
	my_out_be32((unsigned *)((ulong)addr + 0x1554), 0xaa);
	my_out_be32((unsigned *)((ulong)addr + 0xaa8), 0x55);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_long *) (info->start[sect]);
			my_out_be32((unsigned *)((ulong)addr), 0x00300030);
			l_sect = sect;
		}
	}

#else
#error CONFIG_BOOT_(size)B missing.
#endif
	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	/* wait at least 80us - let's wait 1 ms */
	udelay(1000);

	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;

	start = get_timer(0);
	last = start;
	addr = (vu_long *) (info->start[l_sect]);
#if defined(CONFIG_BOOT_8B)
	while ((my_in_8((unsigned char *) addr) & 0x80) != 0x80)
#elif defined(CONFIG_BOOT_16B)
	while ((my_in_be16((unsigned short *) addr) & 0x0080) != 0x0080)
#elif defined(CONFIG_BOOT_32B)
	while ((my_in_be32((unsigned *) addr) & 0x00800080) != 0x00800080)
#else
#error CONFIG_BOOT_(size)B missing.
#endif
	{
		now = get_timer(start);
		if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			putc('.');
			last = now;
		}
	}
DONE:
	/* reset to read mode */
	addr = (volatile unsigned long *) info->start[0];

#if defined(CONFIG_BOOT_8B)
	my_out_8((unsigned char *) addr, 0xf0);
#elif defined(CONFIG_BOOT_16B)
	my_out_be16((unsigned short *) addr, 0x00f0);
#elif defined(CONFIG_BOOT_32B)
	my_out_be32((unsigned *) addr, 0x00F000F0);	/* reset bank */
#else
#error CONFIG_BOOT_(size)B missing.
#endif
	printf(" done\n");
	return 0;
}

/*
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */

int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3);	/* get lower word aligned address */

	/*
	 * handle unaligned start bytes
	 */
	l = addr - wp;

	if (l != 0) {
		data = 0;
		for (i = 0, cp = wp; i < l; ++i, ++cp)
			data = (data << 8) | (*(uchar *) cp);

		for (; i < 4 && cnt > 0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt == 0 && i < 4; ++i, ++cp)
			data = (data << 8) | (*(uchar *) cp);

		rc = write_word(info, wp, data);

		if (rc != 0)
			return rc;

		wp += 4;
	}

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = 0;
		for (i = 0; i < 4; ++i)
			data = (data << 8) | *src++;

		rc = write_word(info, wp, data);

		if (rc != 0)
			return rc;

		wp += 4;
		cnt -= 4;
	}

	if (cnt == 0)
		return 0;

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i < 4; ++i, ++cp)
		data = (data << 8) | (*(uchar *) cp);

	return write_word(info, wp, data);
}

/*
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word(flash_info_t *info, ulong dest, ulong data)
{
	ulong addr = (ulong) (info->start[0]);
	ulong start, last;
	int flag;
	ulong i;
	int data_short[2];

	/* Check if Flash is (sufficiently) erased */
	if (((ulong)*(ulong *)dest & data) != data)
		return 2;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();
#if defined(CONFIG_BOOT_8B)
#ifdef DEBUG
	{
		int in_mid, in_did;

		my_out_8((unsigned char *) (addr + 0x555), 0xaa);
		my_out_8((unsigned char *) (addr + 0x2aa), 0x55);
		my_out_8((unsigned char *) (addr + 0x555), 0x90);

		in_mid = my_in_8((unsigned char *) addr);
		in_did = my_in_8((unsigned char *) (addr + 1));

		printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);

		my_out_8((unsigned char *) addr, 0xf0);
		udelay(1);
	}
#endif
	{
		int data_ch[4];

		data_ch[0] = (int) ((data >> 24) & 0xff);
		data_ch[1] = (int) ((data >> 16) & 0xff);
		data_ch[2] = (int) ((data >> 8) & 0xff);
		data_ch[3] = (int) (data & 0xff);

		for (i = 0; i < 4; i++) {
			my_out_8((unsigned char *) (addr + 0x555), 0xaa);
			my_out_8((unsigned char *) (addr + 0x2aa), 0x55);
			my_out_8((unsigned char *) (addr + 0x555), 0xa0);
			my_out_8((unsigned char *) (dest + i), data_ch[i]);

			/* re-enable interrupts if necessary */
			if (flag)
				enable_interrupts();

			start = get_timer(0);
			last = start;
			while ((my_in_8((unsigned char *)(dest + i))) !=
			       (data_ch[i])) {
				if (get_timer(start) >
				    CONFIG_SYS_FLASH_WRITE_TOUT) {
					return 1;
				}
			}
		}		/* for */
	}
#elif defined(CONFIG_BOOT_16B)
	data_short[0] = (int) (data >> 16) & 0xffff;
	data_short[1] = (int) data & 0xffff;
	for (i = 0; i < 2; i++) {
		my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xaa);
		my_out_be16((unsigned short *)((ulong)addr + 0x554), 0x55);
		my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xa0);
		my_out_be16((unsigned short *)(dest + (i * 2)),
			    data_short[i]);

		/* re-enable interrupts if necessary */
		if (flag)
			enable_interrupts();

		start = get_timer(0);
		last = start;
		while ((my_in_be16((unsigned short *)(dest + (i * 2)))) !=
							(data_short[i])) {
			if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
				return 1;
		}
	}
#elif defined(CONFIG_BOOT_32B)
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00A000A0;

	*((vu_long *)dest) = data;

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	/* data polling for D7 */
	start = get_timer(0);
	while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
			return 1;
	}
#endif
	return 0;
}

#ifdef CONFIG_BOOT_8B
static int my_in_8(unsigned char *addr)
{
	int ret;
	__asm__ __volatile__("lbz%U1%X1 %0,%1; eieio":"=r"(ret):"m"(*addr));

	return ret;
}

static void my_out_8(unsigned char *addr, int val)
{
	__asm__ __volatile__("stb%U0%X0 %1,%0; eieio":"=m"(*addr):"r"(val));
}
#endif
#ifdef CONFIG_BOOT_16B
static int my_in_be16(unsigned short *addr)
{
	int ret;
	__asm__ __volatile__("lhz%U1%X1 %0,%1; eieio":"=r"(ret):"m"(*addr));

	return ret;
}

static void my_out_be16(unsigned short *addr, int val)
{
	__asm__ __volatile__("sth%U0%X0 %1,%0; eieio":"=m"(*addr):"r"(val));
}
#endif
#ifdef CONFIG_BOOT_32B
static unsigned my_in_be32(unsigned *addr)
{
	unsigned ret;
	__asm__ __volatile__("lwz%U1%X1 %0,%1; eieio":"=r"(ret):"m"(*addr));

	return ret;
}

static void my_out_be32(unsigned *addr, int val)
{
	__asm__ __volatile__("stw%U0%X0 %1,%0; eieio":"=m"(*addr):"r"(val));
}
#endif