summaryrefslogtreecommitdiff
path: root/sys/arch/aviion/include/bus.h
blob: d786a62a892c00c1ba99f1b19ddd8f1380e546eb (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
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
/*	$OpenBSD: bus.h,v 1.1 2006/05/09 18:18:49 miod Exp $	*/
/*
 * Copyright (c) 2004, Miodrag Vallat.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Simple aviion bus_space implementation.
 *
 * Currently, we only need specific handling for 32 bit read/writes in D16
 * space, and this choice is made at compile time.  As a result, all the
 * implementation can go through macros or inline functions, except for
 * the management functions.
 */

#ifndef	_AVIION_BUS_H_
#define	_AVIION_BUS_H_

#include <machine/asm_macro.h>

typedef	u_int32_t	bus_addr_t;
typedef	u_int32_t	bus_size_t;

typedef	u_int32_t	bus_space_handle_t;

struct aviion_bus_space_tag {
	int	(*bs_map)(bus_addr_t, bus_size_t, int, bus_space_handle_t *);
	void	(*bs_unmap)(bus_space_handle_t, bus_size_t);
	int	(*bs_subregion)(bus_space_handle_t, bus_size_t, bus_size_t,
		    bus_space_handle_t *);
	void *	(*bs_vaddr)(bus_space_handle_t);
	/* alloc, free not implemented yet */
};

typedef const struct aviion_bus_space_tag *bus_space_tag_t;

#define	BUS_SPACE_BARRIER_READ	0
#define	BUS_SPACE_BARRIER_WRITE	1

#define	BUS_SPACE_MAP_CACHEABLE	0x01
#define	BUS_SPACE_MAP_LINEAR	0x02

/* 
 * General bus_space function set
 */

#define	bus_space_map(t,a,s,f,r)	((t)->bs_map(a,s,f,r))
#define	bus_space_unmap(t,h,s)		((t)->bs_unmap(h,s))
#define	bus_space_subregion(t,h,o,s,r)	((t)->bs_subregion(h,o,s,r))
#define	bus_space_vaddr(t,h)		((t)->bs_vaddr(h))

static void bus_space_barrier(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, bus_size_t, int);

static __inline__ void
bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, bus_size_t size, int flags)
{
	flush_pipeline();	/* overkill? */
}

/*
 * Read/Write/Region functions for D8 and D16 access.
 * Most of these are straightforward and assume that everything is properly
 * aligned.
 */

#define	bus_space_read_1(tag, handle, offset) \
	((void)(tag), *(volatile u_int8_t *)((handle) + (offset)))
#define	bus_space_read_2(tag, handle, offset) \
	((void)(tag), *(volatile u_int16_t *)((handle) + (offset)))

static void bus_space_read_multi_1(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		*dest++ = bus_space_read_1(tag, 0, offset);
}

static void bus_space_read_multi_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int16_t *, size_t);

static __inline__ void
bus_space_read_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int16_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		*dest++ = bus_space_read_2(tag, 0, offset);
}

static void bus_space_read_raw_multi_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 1;
	while ((int)--size >= 0) {
		*(u_int16_t *)dest =
		    bus_space_read_2(tag, 0, offset);
		dest += 2;
	}
}

static void bus_space_read_region_1(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		*dest++ = bus_space_read_1(tag, 0, offset++);
}

static void bus_space_read_region_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int16_t *, size_t);

static __inline__ void
bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int16_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		*dest++ = bus_space_read_2(tag, 0, offset);
		offset += 2;
	}
}

static void bus_space_read_raw_region_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_raw_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	size >>= 1;
	offset += handle;
	while ((int)--size >= 0) {
		*(u_int16_t *)dest = bus_space_read_2(tag, 0, offset);
		offset += 2;
		dest += 2;
	}
}

#define	bus_space_write_1(tag, handle, offset, value) \
	((void)(tag), *(volatile u_int8_t *)((handle) + (offset)) = (value))
#define	bus_space_write_2(tag, handle, offset, value) \
	((void)(tag), *(volatile u_int16_t *)((handle) + (offset)) = (value))

static void bus_space_write_multi_1(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_1(tag, 0, offset, *dest++);
}

static void bus_space_write_multi_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int16_t *, size_t);

static __inline__ void
bus_space_write_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int16_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_2(tag, 0, offset, *dest++);
}

static void bus_space_write_raw_multi_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 1;
	while ((int)--size >= 0) {
		bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
		dest += 2;
	}
}

static void bus_space_set_multi_1(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t, size_t);

static __inline__ void
bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_1(tag, 0, offset, value);
}

static void bus_space_set_multi_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int16_t, size_t);

static __inline__ void
bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int16_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_2(tag, 0, offset, value);
}

static void bus_space_write_region_1(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_1(tag, 0, offset++, *dest++);
}

static void bus_space_write_region_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int16_t *, size_t);

static __inline__ void
bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int16_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		bus_space_write_2(tag, 0, offset, *dest++);
		offset += 2;
	}
}

static void bus_space_write_raw_region_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_raw_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 1;
	while ((int)--size >= 0) {
		bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
		offset += 2;
		dest += 2;
	}
}

static void bus_space_set_region_1(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t, size_t);

static __inline__ void
bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_1(tag, 0, offset++, value);
}

static void bus_space_set_region_2(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int16_t, size_t);

static __inline__ void
bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int16_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		bus_space_write_2(tag, 0, offset, value);
		offset += 2;
	}
}

static void bus_space_copy_1(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
    bus_space_handle_t, bus_addr_t, bus_size_t);

static __inline__ void
bus_space_copy_1(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
    bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
	o1 += h1;
	o2 += h2;
	while ((int)--count >= 0) {
		*((volatile u_int8_t *)o1)++ = *((volatile u_int8_t *)o2)++;
	}
}

static void bus_space_copy_2(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
    bus_space_handle_t, bus_addr_t, bus_size_t);

static __inline__ void
bus_space_copy_2(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
    bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
	o1 += h1;
	o2 += h2;
	while ((int)--count >= 0) {
		*(volatile u_int16_t *)o1 = *(volatile u_int16_t *)o2;
		o1 += 2;
		o2 += 2;
	}
}

/*
 * Unrestricted D32 access
 */

#ifndef	__BUS_SPACE_RESTRICT_D16__

#define	bus_space_read_4(tag, handle, offset) \
	((void)(tag), *(volatile u_int32_t *)((handle) + (offset)))

static void bus_space_read_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		*dest++ = bus_space_read_4(tag, 0, offset);
}

static void bus_space_read_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 2;
	while ((int)--size >= 0) {
		*(u_int32_t *)dest =
		    bus_space_read_4(tag, 0, offset);
		dest += 4;
	}
}

static void bus_space_read_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		*dest++ = bus_space_read_4(tag, 0, offset);
		offset += 4;
	}
}

static void bus_space_read_raw_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	size >>= 2;
	offset += handle;
	while ((int)--size >= 0) {
		*(u_int32_t *)dest = bus_space_read_4(tag, 0, offset);
		offset += 4;
		dest += 4;
	}
}

#define	bus_space_write_4(tag, handle, offset, value) \
	((void)(tag), *(volatile u_int32_t *)((handle) + (offset)) = (value))

static void bus_space_write_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_4(tag, 0, offset, *dest++);
}

static void bus_space_write_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 2;
	while ((int)--size >= 0) {
		bus_space_write_4(tag, 0, offset, *(u_int32_t *)dest);
		dest += 4;
	}
}

static void bus_space_set_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t, size_t);

static __inline__ void
bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_4(tag, 0, offset, value);
}

static void bus_space_write_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		bus_space_write_4(tag, 0, offset, *dest++);
		offset += 4;
	}
}

static void bus_space_write_raw_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 2;
	while ((int)--size >= 0) {
		bus_space_write_4(tag, 0, offset, *(u_int32_t *)dest);
		offset += 4;
		dest += 4;
	}
}

static void bus_space_set_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t, size_t);

static __inline__ void
bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		bus_space_write_4(tag, 0, offset, value);
		offset += 4;
	}
}

static void bus_space_copy_4(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
    bus_space_handle_t, bus_addr_t, bus_size_t);

static __inline__ void
bus_space_copy_4(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
    bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
	o1 += h1;
	o2 += h2;
	while ((int)--count >= 0) {
		*(volatile u_int32_t *)o1 = *(volatile u_int32_t *)o2;
		o1 += 4;
		o2 += 4;
	}
}

#else	/* __BUS_SPACE_RESTRICT_D16__ */

/*
 * Restricted D32 access - done through two adjacent D16 access.
 *
 * The speed of the basic read and write routines is critical.
 * This implementation uses a temporary variable on stack, and does
 * two 16 bit load&store sequences. Since the stack is in Dcache, this
 * is faster and spills fewer register than a register-only sequence
 * (which would need to ld.h into two distinct registers, then extu
 * the second one into itself, and or both in the result register).
 */

static u_int32_t d16_read_4(vaddr_t);
static void d16_write_4(vaddr_t, u_int32_t);

static __inline__ u_int32_t
d16_read_4(vaddr_t va)
{
	u_int32_t tmp;

	*(u_int16_t *)&tmp = *(volatile u_int16_t *)va;
	*(u_int16_t *)((vaddr_t)&tmp + 2) = *(volatile u_int16_t *)(va + 2);

	return tmp;
}

static __inline__ void
d16_write_4(vaddr_t va, u_int32_t value)
{
	u_int32_t tmp = value;

	*(volatile u_int16_t *)va = *(u_int16_t *)&tmp;
	*(volatile u_int16_t *)(va + 2) = *(u_int16_t *)((vaddr_t)&tmp + 2);
}

#define	bus_space_read_4(tag, handle, offset) \
	((void)(tag), d16_read_4((handle) + (offset)))

static void bus_space_read_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		*dest++ = bus_space_read_4(tag, 0, offset);
}

static void bus_space_read_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 1;
	while ((int)--size >= 0) {
		*(u_int16_t *)dest = bus_space_read_2(tag, 0, offset);
		dest += 2;
	}
}

static void bus_space_read_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *__dest, size_t count)
{
	u_int16_t *dest = (u_int16_t *)__dest;

	offset += handle;
	count <<= 1;
	while ((int)--count >= 0) {
		*dest++ = bus_space_read_2(tag, 0, offset);
		offset += 2;
	}
}

static void bus_space_read_raw_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_read_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	size >>= 1;
	offset += handle;
	while ((int)--size >= 0) {
		*(u_int16_t *)dest = bus_space_read_2(tag, 0, offset);
		offset += 2;
		dest += 2;
	}
}

#define	bus_space_write_4(tag, handle, offset, value) \
	((void)(tag), d16_write_4((handle) + (offset), (value)))

static void bus_space_write_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *dest, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_4(tag, 0, offset, *dest++);
}

static void bus_space_write_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 1;
	while ((int)--size >= 0) {
		bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
		dest += 2;
	}
}

static void bus_space_set_multi_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t, size_t);

static __inline__ void
bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0)
		bus_space_write_4(tag, 0, offset, value);
}

static void bus_space_write_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t *, size_t);

static __inline__ void
bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t *__dest, size_t count)
{
	u_int16_t *dest = (u_int16_t *)__dest;

	offset += handle;
	count <<= 1;
	while ((int)--count >= 0) {
		bus_space_write_2(tag, 0, offset, *dest++);
		offset += 2;
	}
}

static void bus_space_write_raw_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int8_t *, size_t);

static __inline__ void
bus_space_write_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int8_t *dest, size_t size)
{
	offset += handle;
	size >>= 1;
	while ((int)--size >= 0) {
		bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
		offset += 2;
		dest += 2;
	}
}

static void bus_space_set_region_4(bus_space_tag_t, bus_space_handle_t,
    bus_addr_t, u_int32_t, size_t);

static __inline__ void
bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
    bus_addr_t offset, u_int32_t value, size_t count)
{
	offset += handle;
	while ((int)--count >= 0) {
		bus_space_write_4(tag, 0, offset, value);
		offset += 4;
	}
}

static void bus_space_copy_4(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
    bus_space_handle_t, bus_addr_t, bus_size_t);

static __inline__ void
bus_space_copy_4(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
    bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
	o1 += h1;
	o2 += h2;
	count <<= 1;
	while ((int)--count >= 0) {
		*(volatile u_int16_t *)o1 = *(volatile u_int16_t *)o2;
		o1 += 2;
		o2 += 2;
	}
}

/*
 * Extra D16 access functions (see vme.c)
 */

void d16_bcopy(const void *, void *, size_t);
void d16_bzero(void *, size_t);

#endif	/* __BUS_SPACE_RESTRICT_D16__ */

#endif	/* _AVIION_BUS_H_ */