Annotation of sys/arch/sparc/include/bus.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: bus.h,v 1.6 2006/01/01 00:41:02 millert Exp $ */
2: /*
3: * Copyright (c) 2003, Miodrag Vallat.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: /*
28: * ``No-nonsense'' sparc bus_space implementation.
29: *
30: * This is a stripped down bus_space implementation for sparc, providing
31: * simple enough functions, suitable for inlining.
32: * To achieve this goal, it relies upon the following assumptions:
33: * - everything is memory-mapped. Hence, tags are basically not used,
34: * and most operation are just simple pointer arithmetic with the handle.
35: * - interrupt functions are not implemented; callers will provide their
36: * own wrappers on a need-to-do basis.
37: */
38:
39: #ifndef _SPARC_BUS_H_
40: #define _SPARC_BUS_H_
41:
42: #include <machine/autoconf.h>
43:
44: #include <uvm/uvm_extern.h>
45:
46: #include <machine/pmap.h>
47:
48: typedef u_int32_t bus_space_handle_t;
49:
50: /*
51: * bus_space_tag_t are pointer to *modified* rom_reg structures.
52: * rr_iospace is used to also carry bus endianness information.
53: */
54: typedef struct rom_reg *bus_space_tag_t;
55:
56: #define TAG_LITTLE_ENDIAN 0x80000000
57:
58: #define SET_TAG_BIG_ENDIAN(t) ((t))->rr_iospace &= ~TAG_LITTLE_ENDIAN
59: #define SET_TAG_LITTLE_ENDIAN(t) ((t))->rr_iospace |= TAG_LITTLE_ENDIAN
60:
61: #define IS_TAG_LITTLE_ENDIAN(t) ((t)->rr_iospace & TAG_LITTLE_ENDIAN)
62:
63: typedef u_int32_t bus_addr_t;
64: typedef u_int32_t bus_size_t;
65:
66: /*
67: * General bus_space function set
68: */
69:
70: static int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int,
71: bus_space_handle_t *);
72: static int bus_space_unmap(bus_space_tag_t, bus_space_handle_t,
73: bus_size_t);
74:
75: #define BUS_SPACE_BARRIER_READ 0
76: #define BUS_SPACE_BARRIER_WRITE 1
77:
78: static void bus_space_barrier(bus_space_tag_t, bus_space_handle_t,
79: bus_addr_t, bus_size_t, int);
80:
81: static void* bus_space_vaddr(bus_space_tag_t, bus_space_handle_t);
82: static int bus_space_subregion(bus_space_tag_t, bus_space_handle_t,
83: bus_addr_t, bus_size_t, bus_space_handle_t *);
84:
85: static __inline__ int
86: bus_space_map(bus_space_tag_t tag, bus_addr_t addr, bus_size_t size, int flags,
87: bus_space_handle_t *handle)
88: {
89: if ((*handle = (bus_space_handle_t)mapiodev(tag,
90: addr, size)) != NULL)
91: return (0);
92:
93: return (ENOMEM);
94: }
95:
96: static __inline__ int
97: bus_space_unmap(bus_space_tag_t tag, bus_space_handle_t handle, bus_size_t size)
98: {
99: /*
100: * The mapiodev() call eventually ended up as a set of pmap_kenter_pa()
101: * calls. Although the iospace va will not be reclaimed, at least
102: * relinquish the wiring.
103: */
104: pmap_kremove((vaddr_t)handle, size);
105: pmap_update(pmap_kernel());
106: return (0);
107: }
108:
109: static __inline__ void
110: bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t handle,
111: bus_addr_t offset, bus_size_t size, int flags)
112: {
113: /* no membar is necessary for sparc so far */
114: }
115:
116: static __inline__ void *
117: bus_space_vaddr(bus_space_tag_t tag, bus_space_handle_t handle)
118: {
119: u_int32_t iospace = tag->rr_iospace;
120: void *rc;
121:
122: tag->rr_iospace &= ~TAG_LITTLE_ENDIAN;
123: rc = (void *)(REG2PHYS(tag, 0) | PMAP_NC);
124: tag->rr_iospace = iospace;
125: return (rc);
126: }
127:
128: static __inline__ int
129: bus_space_subregion(bus_space_tag_t tag, bus_space_handle_t handle,
130: bus_addr_t offset, bus_size_t size, bus_space_handle_t *newh)
131: {
132: *newh = handle + offset;
133: return (0);
134: }
135:
136: /*
137: * Read/Write/Region functions
138: * Most of these are straightforward and assume that everything is properly
139: * aligned.
140: */
141:
142: #define bus_space_read_1(tag, handle, offset) \
143: ((void)(tag), *(volatile u_int8_t *)((handle) + (offset)))
144: #define __bus_space_read_2(tag, handle, offset) \
145: *(volatile u_int16_t *)((handle) + (offset))
146: #define __bus_space_read_4(tag, handle, offset) \
147: *(volatile u_int32_t *)((handle) + (offset))
148: #define bus_space_read_2(tag, handle, offset) \
149: ((IS_TAG_LITTLE_ENDIAN(tag)) ? \
150: letoh16(__bus_space_read_2(tag, handle, offset)) : \
151: __bus_space_read_2(tag, handle, offset))
152: #define bus_space_read_4(tag, handle, offset) \
153: ((IS_TAG_LITTLE_ENDIAN(tag)) ? \
154: letoh32(__bus_space_read_4(tag, handle, offset)) : \
155: __bus_space_read_4(tag, handle, offset))
156:
157: static void bus_space_read_multi_1(bus_space_tag_t, bus_space_handle_t,
158: bus_addr_t, u_int8_t *, size_t);
159:
160: static __inline__ void
161: bus_space_read_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
162: bus_addr_t offset, u_int8_t *dest, size_t count)
163: {
164: while ((int)--count >= 0)
165: *dest++ = bus_space_read_1(tag, handle, offset);
166: }
167:
168: static void bus_space_read_multi_2(bus_space_tag_t, bus_space_handle_t,
169: bus_addr_t, u_int16_t *, size_t);
170:
171: static __inline__ void
172: bus_space_read_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
173: bus_addr_t offset, u_int16_t *dest, size_t count)
174: {
175: while ((int)--count >= 0)
176: *dest++ = bus_space_read_2(tag, handle, offset);
177: }
178:
179: static void bus_space_read_multi_4(bus_space_tag_t, bus_space_handle_t,
180: bus_addr_t, u_int32_t *, size_t);
181:
182: static __inline__ void
183: bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
184: bus_addr_t offset, u_int32_t *dest, size_t count)
185: {
186: while ((int)--count >= 0)
187: *dest++ = bus_space_read_4(tag, handle, offset);
188: }
189:
190: static void bus_space_read_raw_multi_2(bus_space_tag_t, bus_space_handle_t,
191: bus_addr_t, u_int8_t *, size_t);
192:
193: static __inline__ void
194: bus_space_read_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
195: bus_addr_t offset, u_int8_t *dest, size_t size)
196: {
197: size >>= 1;
198: while ((int)--size >= 0) {
199: *(u_int16_t *)dest =
200: __bus_space_read_2(tag, handle, offset);
201: dest += 2;
202: }
203: }
204:
205: static void bus_space_read_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
206: bus_addr_t, u_int8_t *, size_t);
207:
208: static __inline__ void
209: bus_space_read_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
210: bus_addr_t offset, u_int8_t *dest, size_t size)
211: {
212: size >>= 2;
213: while ((int)--size >= 0) {
214: *(u_int32_t *)dest =
215: __bus_space_read_4(tag, handle, offset);
216: dest += 4;
217: }
218: }
219:
220: #define bus_space_write_1(tag, handle, offset, value) \
221: ((void)(tag), *(volatile u_int8_t *)((handle) + (offset)) = (value))
222: #define __bus_space_write_2(tag, handle, offset, value) \
223: *(volatile u_int16_t *)((handle) + (offset)) = (value)
224: #define __bus_space_write_4(tag, handle, offset, value) \
225: *(volatile u_int32_t *)((handle) + (offset)) = (value)
226: #define bus_space_write_2(tag, handle, offset, value) \
227: __bus_space_write_2(tag, handle, offset, \
228: (IS_TAG_LITTLE_ENDIAN(tag)) ? htole16(value) : (value))
229: #define bus_space_write_4(tag, handle, offset, value) \
230: __bus_space_write_4(tag, handle, offset, \
231: (IS_TAG_LITTLE_ENDIAN(tag)) ? htole32(value) : (value))
232:
233: static void bus_space_write_multi_1(bus_space_tag_t, bus_space_handle_t,
234: bus_addr_t, u_int8_t *, size_t);
235:
236: static __inline__ void
237: bus_space_write_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
238: bus_addr_t offset, u_int8_t *dest, size_t count)
239: {
240: while ((int)--count >= 0)
241: bus_space_write_1(tag, handle, offset, *dest++);
242: }
243:
244: static void bus_space_write_multi_2(bus_space_tag_t, bus_space_handle_t,
245: bus_addr_t, u_int16_t *, size_t);
246:
247: static __inline__ void
248: bus_space_write_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
249: bus_addr_t offset, u_int16_t *dest, size_t count)
250: {
251: while ((int)--count >= 0)
252: bus_space_write_2(tag, handle, offset, *dest++);
253: }
254:
255: static void bus_space_write_multi_4(bus_space_tag_t, bus_space_handle_t,
256: bus_addr_t, u_int32_t *, size_t);
257:
258: static __inline__ void
259: bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
260: bus_addr_t offset, u_int32_t *dest, size_t count)
261: {
262: while ((int)--count >= 0)
263: bus_space_write_4(tag, handle, offset, *dest);
264: }
265:
266: static void bus_space_write_raw_multi_2(bus_space_tag_t, bus_space_handle_t,
267: bus_addr_t, u_int8_t *, size_t);
268:
269: static __inline__ void
270: bus_space_write_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
271: bus_addr_t offset, u_int8_t *dest, size_t size)
272: {
273: size >>= 1;
274: while ((int)--size >= 0) {
275: __bus_space_write_2(tag, handle, offset,
276: *(u_int16_t *)dest);
277: dest += 2;
278: }
279: }
280:
281: static void bus_space_write_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
282: bus_addr_t, u_int8_t *, size_t);
283:
284: static __inline__ void
285: bus_space_write_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
286: bus_addr_t offset, u_int8_t *dest, size_t size)
287: {
288: size >>= 2;
289: while ((int)--size >= 0) {
290: __bus_space_write_4(tag, handle, offset,
291: *(u_int32_t *)dest);
292: dest += 4;
293: }
294: }
295:
296: static void bus_space_set_multi_1(bus_space_tag_t, bus_space_handle_t,
297: bus_addr_t, u_int8_t, size_t);
298:
299: static __inline__ void
300: bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
301: bus_addr_t offset, u_int8_t value, size_t count)
302: {
303: while ((int)--count >= 0)
304: bus_space_write_1(tag, handle, offset, value);
305: }
306:
307: static void bus_space_set_multi_2(bus_space_tag_t, bus_space_handle_t,
308: bus_addr_t, u_int16_t, size_t);
309:
310: static __inline__ void
311: bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
312: bus_addr_t offset, u_int16_t value, size_t count)
313: {
314: while ((int)--count >= 0)
315: bus_space_write_2(tag, handle, offset, value);
316: }
317:
318: static void bus_space_set_multi_4(bus_space_tag_t, bus_space_handle_t,
319: bus_addr_t, u_int32_t, size_t);
320:
321: static __inline__ void
322: bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
323: bus_addr_t offset, u_int32_t value, size_t count)
324: {
325: while ((int)--count >= 0)
326: bus_space_write_4(tag, handle, offset, value);
327: }
328:
329: static void bus_space_write_region_1(bus_space_tag_t, bus_space_handle_t,
330: bus_addr_t, u_int8_t *, size_t);
331:
332: static __inline__ void
333: bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
334: bus_addr_t offset, u_int8_t *dest, size_t count)
335: {
336: while ((int)--count >= 0)
337: bus_space_write_1(tag, handle, offset++, *dest++);
338: }
339:
340: static void bus_space_write_region_2(bus_space_tag_t, bus_space_handle_t,
341: bus_addr_t, u_int16_t *, size_t);
342:
343: static __inline__ void
344: bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
345: bus_addr_t offset, u_int16_t *dest, size_t count)
346: {
347: while ((int)--count >= 0) {
348: bus_space_write_2(tag, handle, offset, *dest++);
349: offset += 2;
350: }
351: }
352:
353: static void bus_space_write_region_4(bus_space_tag_t, bus_space_handle_t,
354: bus_addr_t, u_int32_t *, size_t);
355:
356: static __inline__ void
357: bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
358: bus_addr_t offset, u_int32_t *dest, size_t count)
359: {
360: while ((int)--count >= 0) {
361: bus_space_write_4(tag, handle, offset, *dest++);
362: offset +=4;
363: }
364: }
365:
366: static void bus_space_write_raw_region_2(bus_space_tag_t, bus_space_handle_t,
367: bus_addr_t, u_int8_t *, size_t);
368:
369: static __inline__ void
370: bus_space_write_raw_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
371: bus_addr_t offset, u_int8_t *dest, size_t size)
372: {
373: size >>= 1;
374: while ((int)--size >= 0) {
375: __bus_space_write_2(tag, handle, offset, *(u_int16_t *)dest);
376: offset += 2;
377: dest += 2;
378: }
379: }
380:
381: static void bus_space_write_raw_region_4(bus_space_tag_t, bus_space_handle_t,
382: bus_addr_t, u_int8_t *, size_t);
383:
384: static __inline__ void
385: bus_space_write_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
386: bus_addr_t offset, u_int8_t *dest, size_t size)
387: {
388: size >>= 2;
389: while ((int)--size >= 0) {
390: __bus_space_write_4(tag, handle, offset, *(u_int32_t *)dest);
391: offset += 4;
392: dest += 4;
393: }
394: }
395:
396: static void bus_space_read_region_1(bus_space_tag_t, bus_space_handle_t,
397: bus_addr_t, u_int8_t *, size_t);
398:
399: static __inline__ void
400: bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
401: bus_addr_t offset, u_int8_t *dest, size_t count)
402: {
403: while ((int)--count >= 0)
404: *dest++ = bus_space_read_1(tag, handle, offset++);
405: }
406:
407: static void bus_space_read_region_2(bus_space_tag_t, bus_space_handle_t,
408: bus_addr_t, u_int16_t *, size_t);
409:
410: static __inline__ void
411: bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
412: bus_addr_t offset, u_int16_t *dest, size_t count)
413: {
414: while ((int)--count >= 0) {
415: *dest++ = bus_space_read_2(tag, handle, offset);
416: offset += 2;
417: }
418: }
419:
420: static void bus_space_read_region_4(bus_space_tag_t, bus_space_handle_t,
421: bus_addr_t, u_int32_t *, size_t);
422:
423: static __inline__ void
424: bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
425: bus_addr_t offset, u_int32_t *dest, size_t count)
426: {
427: while ((int)--count >= 0) {
428: *dest++ = bus_space_read_4(tag, handle, offset);
429: offset += 4;
430: }
431: }
432:
433: static void bus_space_set_region_1(bus_space_tag_t, bus_space_handle_t,
434: bus_addr_t, u_int8_t, size_t);
435:
436: static __inline__ void
437: bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
438: bus_addr_t offset, u_int8_t value, size_t count)
439: {
440: while ((int)--count >= 0)
441: bus_space_write_1(tag, handle, offset++, value);
442: }
443:
444: static void bus_space_set_region_2(bus_space_tag_t, bus_space_handle_t,
445: bus_addr_t, u_int16_t, size_t);
446:
447: static __inline__ void
448: bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
449: bus_addr_t offset, u_int16_t value, size_t count)
450: {
451: while ((int)--count >= 0) {
452: bus_space_write_2(tag, handle, offset, value);
453: offset += 2;
454: }
455: }
456:
457: static void bus_space_set_region_4(bus_space_tag_t, bus_space_handle_t,
458: bus_addr_t, u_int32_t, size_t);
459:
460: static __inline__ void
461: bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
462: bus_addr_t offset, u_int32_t value, size_t count)
463: {
464: while ((int)--count >= 0) {
465: bus_space_write_4(tag, handle, offset, value);
466: offset += 4;
467: }
468: }
469:
470: static void bus_space_read_raw_region_2(bus_space_tag_t, bus_space_handle_t,
471: bus_addr_t, u_int8_t *, size_t);
472:
473: static __inline__ void
474: bus_space_read_raw_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
475: bus_addr_t offset, u_int8_t *dest, size_t size)
476: {
477: size >>= 1;
478: while ((int)--size >= 0) {
479: *(u_int16_t *)dest = __bus_space_read_2(tag, handle, offset);
480: offset += 2;
481: dest += 2;
482: }
483: }
484:
485: static void bus_space_read_raw_region_4(bus_space_tag_t, bus_space_handle_t,
486: bus_addr_t, u_int8_t *, size_t);
487:
488: static __inline__ void
489: bus_space_read_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
490: bus_addr_t offset, u_int8_t *dest, size_t size)
491: {
492: size >>= 2;
493: while ((int)--size >= 0) {
494: *(u_int32_t *)dest = __bus_space_read_4(tag, handle, offset);
495: offset += 4;
496: dest += 4;
497: }
498: }
499:
500: #endif /* _SPARC_BUS_H_ */
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