1 /* $OpenBSD: bus.h,v 1.12 2022/02/14 13:03:52 aoyama Exp $ */
2 /* $NetBSD: bus.h,v 1.9 1998/01/13 18:32:15 scottr Exp $ */
3
4 /*-
5 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (C) 1997 Scott Reynolds. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. The name of the author may not be used to endorse or promote products
46 * derived from this software without specific prior written permission
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
49 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
50 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
51 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
52 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
53 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
57 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 */
59
60 #ifndef _MACHINE_BUS_H_
61 #define _MACHINE_BUS_H_
62
63 /*
64 * Bus address and size types
65 */
66 typedef u_long bus_addr_t;
67 typedef u_long bus_size_t;
68
69 /*
70 * Access methods for bus resources and address space.
71 */
72 typedef u_long bus_space_handle_t;
73 typedef struct luna88k_bus_space_tag *bus_space_tag_t;
74
75 struct luna88k_bus_space_tag {
76 /* 'stride' for each bytes reading/writing */
77 uint8_t bs_stride_1;
78 uint8_t bs_stride_2;
79 uint8_t bs_stride_4;
80 uint8_t bs_stride_8;
81 bus_size_t bs_offset;
82 uint bs_flags;
83 #define TAG_LITTLE_ENDIAN 0x01
84 };
85
86 #define SET_TAG_BIG_ENDIAN(t) ((t))->bs_flags &= ~TAG_LITTLE_ENDIAN
87 #define SET_TAG_LITTLE_ENDIAN(t) ((t))->bs_flags |= TAG_LITTLE_ENDIAN
88
89 #define IS_TAG_LITTLE_ENDIAN(t) ((t)->bs_flags & TAG_LITTLE_ENDIAN)
90
91 /*
92 * int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
93 * bus_size_t size, int flags, bus_space_handle_t *bshp);
94 *
95 * Map a region of bus space.
96 */
97
98 #define BUS_SPACE_MAP_CACHEABLE 0x01
99 #define BUS_SPACE_MAP_LINEAR 0x02
100
101 static __inline__ int
bus_space_map(bus_space_tag_t t,bus_addr_t bpa,bus_size_t size,int flags,bus_space_handle_t * bshp)102 bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, int flags,
103 bus_space_handle_t *bshp)
104 {
105 /* direct-mapped on luna88k, with offset */
106 *bshp = (bus_space_handle_t)(bpa + (t->bs_offset));
107 return 0;
108 }
109
110 /*
111 * void bus_space_unmap(bus_space_tag_t t,
112 * bus_space_handle_t bsh, bus_size_t size);
113 *
114 * Unmap a region of bus space.
115 */
116
117 static __inline__ void
bus_space_unmap(bus_space_tag_t t,bus_space_handle_t bsh,bus_size_t size)118 bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size)
119 {
120 /* direct-mapped on luna88k; nothing to do */
121 return;
122 }
123
124 /*
125 * int bus_space_subregion(bus_space_tag_t t,
126 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size,
127 * bus_space_handle_t *nbshp);
128 *
129 * Get a new handle for a subregion of an already-mapped area of bus space.
130 */
131
132 static __inline__ int
bus_space_subregion(bus_space_tag_t t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)133 bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
134 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
135 {
136 *nbshp = bsh + offset;
137 return 0;
138 }
139
140 /*
141 * int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart,
142 * bus_addr_t rend, bus_size_t size, bus_size_t align,
143 * bus_size_t boundary, int flags, bus_addr_t *addrp,
144 * bus_space_handle_t *bshp);
145 *
146 * Allocate a region of bus space.
147 */
148
149 /* XXX: currently unimplemented on luna88k */
150
151 /*
152 * int bus_space_free(bus_space_tag_t t,
153 * bus_space_handle_t bsh, bus_size_t size);
154 *
155 * Free a region of bus space.
156 */
157
158 /* XXX: currently unimplemented on luna88k */
159
160 /*
161 * u_intN_t bus_space_read_N(bus_space_tag_t tag,
162 * bus_space_handle_t bsh, bus_size_t offset);
163 *
164 * Read a 1, 2, 4, or 8 byte quantity from bus space
165 * described by tag/handle/offset.
166 */
167
168 #define bus_space_read_1(t, h, o) \
169 (*(volatile u_int8_t *)((h) + ((o) << (t->bs_stride_1))))
170
171 #define __bus_space_read_2(t, h, o) \
172 (*(volatile u_int16_t *)((h) + ((o) << (t->bs_stride_2))))
173
174 #define __bus_space_read_4(t, h, o) \
175 (*(volatile u_int32_t *)((h) + ((o) << (t->bs_stride_4))))
176
177 #define bus_space_read_2(t, h, o) \
178 ((IS_TAG_LITTLE_ENDIAN(t)) ? \
179 letoh16(__bus_space_read_2(t, h, o)) : \
180 __bus_space_read_2(t, h, o))
181
182 #define bus_space_read_4(t, h, o) \
183 ((IS_TAG_LITTLE_ENDIAN(t)) ? \
184 letoh32(__bus_space_read_4(t, h, o)) : \
185 __bus_space_read_4(t, h, o))
186
187 #if 0 /* Cause a link error for bus_space_read_8 */
188 #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!!
189 #endif
190
191 /*
192 * void bus_space_read_multi_N(bus_space_tag_t tag,
193 * bus_space_handle_t bsh, bus_size_t offset,
194 * u_intN_t *addr, size_t count);
195 *
196 * Read `count' 1, 2, 4, or 8 byte quantities from bus space
197 * described by tag/handle/offset and copy into buffer provided.
198 */
199
200 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)201 bus_space_read_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
202 bus_addr_t offset, u_int8_t *dest, size_t count)
203 {
204 while ((int)--count >= 0)
205 *dest++ = bus_space_read_1(tag, handle, offset);
206 }
207
208 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)209 bus_space_read_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
210 bus_addr_t offset, u_int16_t *dest, size_t count)
211 {
212 while ((int)--count >= 0)
213 *dest++ = bus_space_read_2(tag, handle, offset);
214 }
215
216 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)217 bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
218 bus_addr_t offset, u_int32_t *dest, size_t count)
219 {
220 while ((int)--count >= 0)
221 *dest++ = bus_space_read_4(tag, handle, offset);
222 }
223
224 #if 0 /* Cause a link error for bus_space_read_multi_8 */
225 #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!!
226 #endif
227
228 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)229 bus_space_read_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
230 bus_addr_t offset, u_int8_t *dest, size_t size)
231 {
232 size >>= 1;
233 while ((int)--size >= 0) {
234 *(u_int16_t *)dest =
235 __bus_space_read_2(tag, handle, offset);
236 dest += 2;
237 }
238 }
239
240 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)241 bus_space_read_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
242 bus_addr_t offset, u_int8_t *dest, size_t size)
243 {
244 size >>= 2;
245 while ((int)--size >= 0) {
246 *(u_int32_t *)dest =
247 __bus_space_read_4(tag, handle, offset);
248 dest += 4;
249 }
250 }
251
252 /*
253 * void bus_space_read_region_N(bus_space_tag_t tag,
254 * bus_space_handle_t bsh, bus_size_t offset,
255 * u_intN_t *addr, size_t count);
256 *
257 * Read `count' 1, 2, 4, or 8 byte quantities from bus space
258 * described by tag/handle and starting at `offset' and copy into
259 * buffer provided.
260 */
261
262 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)263 bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
264 bus_addr_t offset, u_int8_t *dest, size_t count)
265 {
266 while ((int)--count >= 0)
267 *dest++ = bus_space_read_1(tag, handle, offset++);
268 }
269
270 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)271 bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
272 bus_addr_t offset, u_int16_t *dest, size_t count)
273 {
274 while ((int)--count >= 0) {
275 *dest++ = bus_space_read_2(tag, handle, offset);
276 offset += 2;
277 }
278 }
279
280 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)281 bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
282 bus_addr_t offset, u_int32_t *dest, size_t count)
283 {
284 while ((int)--count >= 0) {
285 *dest++ = bus_space_read_4(tag, handle, offset);
286 offset += 4;
287 }
288 }
289
290 #if 0 /* Cause a link error for bus_space_read_region_8 */
291 #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!!
292 #endif
293
294 /*
295 * void bus_space_write_N(bus_space_tag_t tag,
296 * bus_space_handle_t bsh, bus_size_t offset,
297 * u_intN_t value);
298 *
299 * Write the 1, 2, 4, or 8 byte value `value' to bus space
300 * described by tag/handle/offset.
301 */
302
303 #define bus_space_write_1(t, h, o, v) \
304 ((void)(*(volatile u_int8_t *)((h) + ((o) << (t->bs_stride_1))) = (v)))
305
306 #define __bus_space_write_2(t, h, o, v) \
307 ((void)(*(volatile u_int16_t *)((h) + ((o) << (t->bs_stride_2))) = (v)))
308
309 #define __bus_space_write_4(t, h, o, v) \
310 ((void)(*(volatile u_int32_t *)((h) + ((o) << (t->bs_stride_4))) = (v)))
311
312 #define bus_space_write_2(t, h, o, v) \
313 __bus_space_write_2(t, h, o, \
314 (IS_TAG_LITTLE_ENDIAN(t)) ? htole16(v) : (v))
315
316 #define bus_space_write_4(t, h, o, v) \
317 __bus_space_write_4(t, h, o, \
318 (IS_TAG_LITTLE_ENDIAN(t)) ? htole32(v) : (v))
319
320 #if 0 /* Cause a link error for bus_space_write_8 */
321 #define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
322 #endif
323
324 /*
325 * void bus_space_write_multi_N(bus_space_tag_t tag,
326 * bus_space_handle_t bsh, bus_size_t offset,
327 * const u_intN_t *addr, size_t count);
328 *
329 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
330 * provided to bus space described by tag/handle/offset.
331 */
332
333 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)334 bus_space_write_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
335 bus_addr_t offset, u_int8_t *dest, size_t count)
336 {
337 while ((int)--count >= 0)
338 bus_space_write_1(tag, handle, offset, *dest++);
339 }
340
341 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)342 bus_space_write_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
343 bus_addr_t offset, u_int16_t *dest, size_t count)
344 {
345 while ((int)--count >= 0)
346 bus_space_write_2(tag, handle, offset, *dest++);
347 }
348
349 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)350 bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
351 bus_addr_t offset, u_int32_t *dest, size_t count)
352 {
353 while ((int)--count >= 0)
354 bus_space_write_4(tag, handle, offset, *dest++);
355 }
356
357 #if 0 /* Cause a link error for bus_space_write_8 */
358 #define bus_space_write_multi_8(t, h, o, a, c) \
359 !!! bus_space_write_multi_8 unimplemented !!!
360 #endif
361
362 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)363 bus_space_write_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
364 bus_addr_t offset, u_int8_t *dest, size_t size)
365 {
366 size >>= 1;
367 while ((int)--size >= 0) {
368 __bus_space_write_2(tag, handle, offset,*(u_int16_t *)dest);
369 dest += 2;
370 }
371 }
372
373 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)374 bus_space_write_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
375 bus_addr_t offset, u_int8_t *dest, size_t size)
376 {
377 size >>= 2;
378 while ((int)--size >= 0) {
379 __bus_space_write_4(tag, handle, offset, *(u_int32_t *)dest);
380 dest += 4;
381 }
382 }
383
384 /*
385 * void bus_space_write_region_N(bus_space_tag_t tag,
386 * bus_space_handle_t bsh, bus_size_t offset,
387 * const u_intN_t *addr, size_t count);
388 *
389 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
390 * to bus space described by tag/handle starting at `offset'.
391 */
392
393 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)394 bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
395 bus_addr_t offset, u_int8_t *dest, size_t count)
396 {
397 while ((int)--count >= 0)
398 bus_space_write_1(tag, handle, offset++, *dest++);
399 }
400
401 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)402 bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
403 bus_addr_t offset, u_int16_t *dest, size_t count)
404 {
405 while ((int)--count >= 0) {
406 bus_space_write_2(tag, handle, offset, *dest++);
407 offset += 2;
408 }
409 }
410
411 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)412 bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
413 bus_addr_t offset, u_int32_t *dest, size_t count)
414 {
415 while ((int)--count >= 0) {
416 bus_space_write_4(tag, handle, offset, *dest++);
417 offset += 4;
418 }
419 }
420
421 #if 0 /* Cause a link error for bus_space_write_region_8 */
422 #define bus_space_write_region_8 \
423 !!! bus_space_write_region_8 unimplemented !!!
424 #endif
425
426 /*
427 * void bus_space_set_multi_N(bus_space_tag_t tag,
428 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
429 * size_t count);
430 *
431 * Write the 1, 2, 4, or 8 byte value `val' to bus space described
432 * by tag/handle/offset `count' times.
433 */
434
435 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)436 bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
437 bus_addr_t offset, u_int8_t value, size_t count)
438 {
439 while ((int)--count >= 0)
440 bus_space_write_1(tag, handle, offset, value);
441 }
442
443 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)444 bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
445 bus_addr_t offset, u_int16_t value, size_t count)
446 {
447 while ((int)--count >= 0)
448 bus_space_write_2(tag, handle, offset, value);
449 }
450
451 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)452 bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
453 bus_addr_t offset, u_int32_t value, size_t count)
454 {
455 while ((int)--count >= 0)
456 bus_space_write_4(tag, handle, offset, value);
457 }
458
459 #if 0 /* Cause a link error for bus_space_set_multi_8 */
460 #define bus_space_set_multi_8 \
461 !!! bus_space_set_multi_8 unimplemented !!!
462 #endif
463
464 /*
465 * void bus_space_set_region_N(bus_space_tag_t tag,
466 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
467 * size_t count);
468 *
469 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
470 * by tag/handle starting at `offset'.
471 */
472
473 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)474 bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
475 bus_addr_t offset, u_int8_t value, size_t count)
476 {
477 while ((int)--count >= 0)
478 bus_space_write_1(tag, handle, offset++, value);
479 }
480
481 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)482 bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
483 bus_addr_t offset, u_int16_t value, size_t count)
484 {
485 while ((int)--count >= 0) {
486 bus_space_write_2(tag, handle, offset, value);
487 offset += 2;
488 }
489 }
490
491 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)492 bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
493 bus_addr_t offset, u_int32_t value, size_t count)
494 {
495 while ((int)--count >= 0) {
496 bus_space_write_4(tag, handle, offset, value);
497 offset += 4;
498 }
499 }
500
501 #if 0 /* Cause a link error for bus_space_set_region_8 */
502 #define bus_space_set_region_8 \
503 !!! bus_space_set_region_8 unimplemented !!!
504 #endif
505
506 /*
507 * void bus_space_copy_N(bus_space_tag_t tag,
508 * bus_space_handle_t bsh1, bus_size_t off1,
509 * bus_space_handle_t bsh2, bus_size_t off2,
510 * size_t count);
511 *
512 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
513 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
514 */
515
516 #define __LUNA88K_copy_N(BYTES) \
517 static __inline void __CONCAT(bus_space_copy_,BYTES) \
518 (bus_space_tag_t, \
519 bus_space_handle_t bsh1, bus_size_t off1, \
520 bus_space_handle_t bsh2, bus_size_t off2, \
521 bus_size_t count); \
522 \
523 static __inline void \
524 __CONCAT(bus_space_copy_,BYTES)(t, h1, o1, h2, o2, c) \
525 bus_space_tag_t t; \
526 bus_space_handle_t h1, h2; \
527 bus_size_t o1, o2, c; \
528 { \
529 bus_size_t o; \
530 \
531 if ((h1 + o1) >= (h2 + o2)) { \
532 /* src after dest: copy forward */ \
533 for (o = 0; c != 0; c--, o += BYTES) \
534 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
535 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
536 } else { \
537 /* dest after src: copy backwards */ \
538 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \
539 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
540 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
541 } \
542 }
543 __LUNA88K_copy_N(1)
544 __LUNA88K_copy_N(2)
545 __LUNA88K_copy_N(4)
546 #if 0 /* Cause a link error for bus_space_copy_8 */
547 #define bus_space_copy_8 \
548 !!! bus_space_copy_8 unimplemented !!!
549 #endif
550
551 #undef __LUNA88K_copy_N
552
553 /*
554 * Bus read/write barrier methods.
555 *
556 * void bus_space_barrier(bus_space_tag_t tag,
557 * bus_space_handle_t bsh, bus_size_t offset,
558 * bus_size_t len, int flags);
559 *
560 */
561 #define bus_space_barrier(t, h, o, l, f) \
562 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)))
563 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
564 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
565
566 #endif /* _MACHINE_BUS_H_ */
567