Annotation of src/sys/arch/emips/include/bus.h, Revision 1.1.14.1
1.1.14.1! mrg 1: /* $NetBSD: bus.h,v 1.2 2012/02/12 16:34:08 matt Exp $ */
1.1 pooka 2:
3: /*-
4: * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to The NetBSD Foundation
8: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9: * NASA Ames Research Center.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30: * POSSIBILITY OF SUCH DAMAGE.
31: */
32:
33: #ifndef _EMIPS_BUS_H_
34: #define _EMIPS_BUS_H_
35:
36: #include <mips/locore.h>
37:
38: /*
39: * Utility macros; do not use outside this file.
40: */
41: #define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(u_int,BITS)
42: #define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t)
43:
44: /*
45: * Bus address and size types
46: */
47: typedef u_long bus_addr_t;
48: typedef u_long bus_size_t;
49:
50: /*
51: * Access methods for bus resources and address space.
52: */
53: typedef int bus_space_tag_t;
54: typedef u_long bus_space_handle_t;
55:
56: /*
57: * int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
58: * bus_size_t size, int flags, bus_space_handle_t *bshp);
59: *
60: * Map a region of bus space.
61: */
62:
63: #define BUS_SPACE_MAP_CACHEABLE 0x01
64: #define BUS_SPACE_MAP_LINEAR 0x02
65: #define BUS_SPACE_MAP_PREFETCHABLE 0x04
66:
67: int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t,
68: int, bus_space_handle_t *);
69:
70: /*
71: * void bus_space_unmap(bus_space_tag_t t,
72: * bus_space_handle_t bsh, bus_size_t size);
73: *
74: * Unmap a region of bus space.
75: */
76:
77: void bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t);
78:
79: /*
80: * int bus_space_subregion(bus_space_tag_t t,
81: * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size,
82: * bus_space_handle_t *nbshp);
83: *
84: * Get a new handle for a subregion of an already-mapped area of bus space.
85: */
86:
87: int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
88: bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp);
89:
90: /*
91: * int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart,
92: * bus_addr_t rend, bus_size_t size, bus_size_t align,
93: * bus_size_t boundary, int flags, bus_addr_t *addrp,
94: * bus_space_handle_t *bshp);
95: *
96: * Allocate a region of bus space.
97: */
98:
99: int bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart,
100: bus_addr_t rend, bus_size_t size, bus_size_t align,
101: bus_size_t boundary, int cacheable, bus_addr_t *addrp,
102: bus_space_handle_t *bshp);
103:
104: /*
105: * int bus_space_free(bus_space_tag_t t,
106: * bus_space_handle_t bsh, bus_size_t size);
107: *
108: * Free a region of bus space.
109: */
110:
111: void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
112: bus_size_t size);
113:
114: /*
115: * void *bus_space_vaddr(bus_space_tag_t, bus_space_handle_t);
116: *
117: * Get the kernel virtual address for the mapped bus space.
118: * Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR.
119: * (XXX not enforced)
120: */
121: #define bus_space_vaddr(t, h) \
122: ((void *)(h))
123:
124: /*
125: * u_intN_t bus_space_read_N(bus_space_tag_t tag,
126: * bus_space_handle_t bsh, bus_size_t offset);
127: *
128: * Read a 1, 2, 4, or 8 byte quantity from bus space
129: * described by tag/handle/offset.
130: */
131:
132: #define bus_space_read_1(t, h, o) \
133: ((void) t, (*(volatile u_int8_t *)((h) + (o))))
134:
135: #define bus_space_read_2(t, h, o) \
136: ((void) t, (*(volatile u_int16_t *)((h) + (o))))
137:
138: #define bus_space_read_4(t, h, o) \
139: ((void) t, (*(volatile u_int32_t *)((h) + (o))))
140:
141: #if 0 /* Cause a link error for bus_space_read_8 */
142: #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!!
143: #endif
144:
145: /*
146: * void bus_space_read_multi_N(bus_space_tag_t tag,
147: * bus_space_handle_t bsh, bus_size_t offset,
148: * u_intN_t *addr, size_t count);
149: *
150: * Read `count' 1, 2, 4, or 8 byte quantities from bus space
151: * described by tag/handle/offset and copy into buffer provided.
152: */
153:
1.1.14.1! mrg 154: #define __EMIPS_bus_space_read_multi(BYTES,BITS) \
1.1 pooka 155: static __inline void __CONCAT(bus_space_read_multi_,BYTES) \
1.1.14.1! mrg 156: (bus_space_tag_t, bus_space_handle_t, bus_size_t, \
! 157: __PB_TYPENAME(BITS) *, size_t); \
1.1 pooka 158: \
159: static __inline void \
1.1.14.1! mrg 160: __CONCAT(bus_space_read_multi_,BYTES)( \
! 161: bus_space_tag_t t, \
! 162: bus_space_handle_t h, \
! 163: bus_size_t o, \
! 164: __PB_TYPENAME(BITS) *a, \
! 165: size_t c) \
1.1 pooka 166: { \
167: \
168: while (c--) \
169: *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \
170: }
171:
172: __EMIPS_bus_space_read_multi(1,8)
173: __EMIPS_bus_space_read_multi(2,16)
174: __EMIPS_bus_space_read_multi(4,32)
175:
176: #if 0 /* Cause a link error for bus_space_read_multi_8 */
177: #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!!
178: #endif
179:
180: #undef __EMIPS_bus_space_read_multi
181:
182: /*
183: * void bus_space_read_region_N(bus_space_tag_t tag,
184: * bus_space_handle_t bsh, bus_size_t offset,
185: * u_intN_t *addr, size_t count);
186: *
187: * Read `count' 1, 2, 4, or 8 byte quantities from bus space
188: * described by tag/handle and starting at `offset' and copy into
189: * buffer provided.
190: */
191:
192: #define __EMIPS_bus_space_read_region(BYTES,BITS) \
193: static __inline void __CONCAT(bus_space_read_region_,BYTES) \
1.1.14.1! mrg 194: (bus_space_tag_t, bus_space_handle_t, bus_size_t, \
! 195: __PB_TYPENAME(BITS) *, size_t); \
1.1 pooka 196: \
197: static __inline void \
1.1.14.1! mrg 198: __CONCAT(bus_space_read_region_,BYTES)( \
! 199: bus_space_tag_t t, \
! 200: bus_space_handle_t h, \
! 201: bus_size_t o, \
! 202: __PB_TYPENAME(BITS) *a, \
! 203: size_t c) \
1.1 pooka 204: { \
205: \
206: while (c--) { \
207: *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \
208: o += BYTES; \
209: } \
210: }
211:
212: __EMIPS_bus_space_read_region(1,8)
213: __EMIPS_bus_space_read_region(2,16)
214: __EMIPS_bus_space_read_region(4,32)
215:
216: #if 0 /* Cause a link error for bus_space_read_region_8 */
217: #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!!
218: #endif
219:
220: #undef __EMIPS_bus_space_read_region
221:
222: /*
223: * void bus_space_write_N(bus_space_tag_t tag,
224: * bus_space_handle_t bsh, bus_size_t offset,
225: * u_intN_t value);
226: *
227: * Write the 1, 2, 4, or 8 byte value `value' to bus space
228: * described by tag/handle/offset.
229: */
230:
231: #define bus_space_write_1(t, h, o, v) \
232: do { \
233: (void) t; \
234: *(volatile u_int8_t *)((h) + (o)) = (v); \
235: wbflush(); /* XXX */ \
236: } while (0)
237:
238: #define bus_space_write_2(t, h, o, v) \
239: do { \
240: (void) t; \
241: *(volatile u_int16_t *)((h) + (o)) = (v); \
242: wbflush(); /* XXX */ \
243: } while (0)
244:
245: #define bus_space_write_4(t, h, o, v) \
246: do { \
247: (void) t; \
248: *(volatile u_int32_t *)((h) + (o)) = (v); \
249: wbflush(); /* XXX */ \
250: } while (0)
251:
252: #if 0 /* Cause a link error for bus_space_write_8 */
253: #define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
254: #endif
255:
256: /*
257: * void bus_space_write_multi_N(bus_space_tag_t tag,
258: * bus_space_handle_t bsh, bus_size_t offset,
259: * const u_intN_t *addr, size_t count);
260: *
261: * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
262: * provided to bus space described by tag/handle/offset.
263: */
264:
265: #define __EMIPS_bus_space_write_multi(BYTES,BITS) \
266: static __inline void __CONCAT(bus_space_write_multi_,BYTES) \
1.1.14.1! mrg 267: (bus_space_tag_t, bus_space_handle_t, bus_size_t, \
! 268: __PB_TYPENAME(BITS) *, size_t); \
1.1 pooka 269: \
270: static __inline void \
1.1.14.1! mrg 271: __CONCAT(bus_space_write_multi_,BYTES)( \
! 272: bus_space_tag_t t, \
! 273: bus_space_handle_t h, \
! 274: bus_size_t o, \
! 275: __PB_TYPENAME(BITS) *a, \
! 276: size_t c) \
1.1 pooka 277: { \
278: \
279: while (c--) \
280: __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \
281: }
282:
283: __EMIPS_bus_space_write_multi(1,8)
284: __EMIPS_bus_space_write_multi(2,16)
285: __EMIPS_bus_space_write_multi(4,32)
286:
287: #if 0 /* Cause a link error for bus_space_write_8 */
288: #define bus_space_write_multi_8(t, h, o, a, c) \
289: !!! bus_space_write_multi_8 unimplimented !!!
290: #endif
291:
292: #undef __EMIPS_bus_space_write_multi
293:
294: /*
295: * void bus_space_write_region_N(bus_space_tag_t tag,
296: * bus_space_handle_t bsh, bus_size_t offset,
297: * const u_intN_t *addr, size_t count);
298: *
299: * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
300: * to bus space described by tag/handle starting at `offset'.
301: */
302:
303: #define __EMIPS_bus_space_write_region(BYTES,BITS) \
304: static __inline void __CONCAT(bus_space_write_region_,BYTES) \
1.1.14.1! mrg 305: (bus_space_tag_t, bus_space_handle_t, bus_size_t, \
! 306: __PB_TYPENAME(BITS) *, size_t); \
1.1 pooka 307: \
308: static __inline void \
1.1.14.1! mrg 309: __CONCAT(bus_space_write_region_,BYTES)( \
! 310: bus_space_tag_t t, \
! 311: bus_space_handle_t h, \
! 312: bus_size_t o, \
! 313: __PB_TYPENAME(BITS) *a, \
! 314: size_t c) \
1.1 pooka 315: { \
316: \
317: while (c--) { \
318: __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \
319: o += BYTES; \
320: } \
321: }
322:
323: __EMIPS_bus_space_write_region(1,8)
324: __EMIPS_bus_space_write_region(2,16)
325: __EMIPS_bus_space_write_region(4,32)
326:
327: #if 0 /* Cause a link error for bus_space_write_region_8 */
328: #define bus_space_write_region_8 \
329: !!! bus_space_write_region_8 unimplemented !!!
330: #endif
331:
332: #undef __EMIPS_bus_space_write_region
333:
334: /*
335: * void bus_space_set_multi_N(bus_space_tag_t tag,
336: * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
337: * size_t count);
338: *
339: * Write the 1, 2, 4, or 8 byte value `val' to bus space described
340: * by tag/handle/offset `count' times.
341: */
342:
343: #define __EMIPS_bus_space_set_multi(BYTES,BITS) \
344: static __inline void __CONCAT(bus_space_set_multi_,BYTES) \
1.1.14.1! mrg 345: (bus_space_tag_t, bus_space_handle_t, bus_size_t, \
1.1 pooka 346: __PB_TYPENAME(BITS), size_t); \
347: \
348: static __inline void \
1.1.14.1! mrg 349: __CONCAT(bus_space_set_multi_,BYTES)( \
! 350: bus_space_tag_t t, \
! 351: bus_space_handle_t h, \
! 352: bus_size_t o, \
! 353: __PB_TYPENAME(BITS) v, \
! 354: size_t c) \
1.1 pooka 355: { \
356: \
357: while (c--) \
358: __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \
359: }
360:
361: __EMIPS_bus_space_set_multi(1,8)
362: __EMIPS_bus_space_set_multi(2,16)
363: __EMIPS_bus_space_set_multi(4,32)
364:
365: #if 0 /* Cause a link error for bus_space_set_multi_8 */
366: #define bus_space_set_multi_8 \
367: !!! bus_space_set_multi_8 unimplemented !!!
368: #endif
369:
370: #undef __EMIPS_bus_space_set_multi
371:
372: /*
373: * void bus_space_set_region_N(bus_space_tag_t tag,
374: * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
375: * size_t count);
376: *
377: * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
378: * by tag/handle starting at `offset'.
379: */
380:
1.1.14.1! mrg 381: #define __EMIPS_bus_space_set_region(BYTES,BITS) \
1.1 pooka 382: static __inline void __CONCAT(bus_space_set_region_,BYTES) \
1.1.14.1! mrg 383: (bus_space_tag_t, bus_space_handle_t, bus_size_t, \
1.1 pooka 384: __PB_TYPENAME(BITS), size_t); \
385: \
386: static __inline void \
1.1.14.1! mrg 387: __CONCAT(bus_space_set_region_,BYTES)( \
! 388: bus_space_tag_t t, \
! 389: bus_space_handle_t h, \
! 390: bus_size_t o, \
! 391: __PB_TYPENAME(BITS) v, \
! 392: size_t c) \
1.1 pooka 393: { \
394: \
395: while (c--) { \
396: __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \
397: o += BYTES; \
398: } \
399: }
400:
401: __EMIPS_bus_space_set_region(1,8)
402: __EMIPS_bus_space_set_region(2,16)
403: __EMIPS_bus_space_set_region(4,32)
404:
405: #if 0 /* Cause a link error for bus_space_set_region_8 */
406: #define bus_space_set_region_8 \
407: !!! bus_space_set_region_8 unimplemented !!!
408: #endif
409:
410: #undef __EMIPS_bus_space_set_region
411:
412: /*
413: * void bus_space_copy_region_N(bus_space_tag_t tag,
414: * bus_space_handle_t bsh1, bus_size_t off1,
415: * bus_space_handle_t bsh2, bus_size_t off2,
416: * bus_size_t count);
417: *
418: * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
419: * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
420: */
421:
422: #define __EMIPS_copy_region(BYTES) \
423: static __inline void __CONCAT(bus_space_copy_region_,BYTES) \
1.1.14.1! mrg 424: (bus_space_tag_t, \
1.1 pooka 425: bus_space_handle_t bsh1, bus_size_t off1, \
426: bus_space_handle_t bsh2, bus_size_t off2, \
427: bus_size_t count); \
428: \
429: static __inline void \
1.1.14.1! mrg 430: __CONCAT(bus_space_copy_region_,BYTES)( \
! 431: bus_space_tag_t t, \
! 432: bus_space_handle_t h1, \
! 433: bus_size_t o1, \
! 434: bus_space_handle_t h2, \
! 435: bus_size_t o2, \
! 436: bus_size_t c) \
1.1 pooka 437: { \
438: bus_size_t o; \
439: \
440: if ((h1 + o1) >= (h2 + o2)) { \
441: /* src after dest: copy forward */ \
442: for (o = 0; c != 0; c--, o += BYTES) \
443: __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
444: __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
445: } else { \
446: /* dest after src: copy backwards */ \
447: for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \
448: __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
449: __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
450: } \
451: }
452:
453: __EMIPS_copy_region(1)
454: __EMIPS_copy_region(2)
455: __EMIPS_copy_region(4)
456:
457: #if 0 /* Cause a link error for bus_space_copy_region_8 */
458: #define bus_space_copy_region_8 \
459: !!! bus_space_copy_region_8 unimplemented !!!
460: #endif
461:
462: #undef __EMIPS_copy_region
463:
464: /*
465: * Bus read/write barrier methods.
466: *
467: * void bus_space_barrier(bus_space_tag_t tag,
468: * bus_space_handle_t bsh, bus_size_t offset,
469: * bus_size_t len, int flags);
470: *
471: * On the MIPS, we just flush the write buffer.
472: */
473: #define bus_space_barrier(t, h, o, l, f) \
474: ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \
475: wbflush()))
476: #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
477: #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
478:
479: #undef __PB_TYPENAME_PREFIX
480: #undef __PB_TYPENAME
481:
482: #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
483:
484: /*
485: * Flags used in various bus DMA methods.
486: */
487: #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
488: #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
489: #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
490: #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
491: #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */
492: #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
493: #define BUS_DMA_BUS2 0x020
494: #define BUS_DMA_BUS3 0x040
495: #define BUS_DMA_BUS4 0x080
496: #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */
497: #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */
498: #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */
499:
500: #define EMIPS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */
501:
502: /* Forwards needed by prototypes below. */
503: struct mbuf;
504: struct uio;
505:
506: /*
507: * Operations performed by bus_dmamap_sync().
508: */
509: #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
510: #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
511: #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
512: #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
513:
514: typedef struct emips_bus_dma_tag *bus_dma_tag_t;
515: typedef struct emips_bus_dmamap *bus_dmamap_t;
516:
517: #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0)
518:
519: /*
520: * bus_dma_segment_t
521: *
522: * Describes a single contiguous DMA transaction. Values
523: * are suitable for programming into DMA registers.
524: */
525: struct emips_bus_dma_segment {
526: bus_addr_t ds_addr; /* DMA address */
527: bus_size_t ds_len; /* length of transfer */
528: bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */
529: };
530: typedef struct emips_bus_dma_segment bus_dma_segment_t;
531:
532: /*
533: * bus_dma_tag_t
534: *
535: * A machine-dependent opaque type describing the implementation of
536: * DMA for a given bus.
537: */
538:
539: struct emips_bus_dma_tag {
540: /*
541: * DMA mapping methods.
542: */
543: int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
544: bus_size_t, bus_size_t, int, bus_dmamap_t *);
545: void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
546: int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
547: bus_size_t, struct proc *, int);
548: int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
549: struct mbuf *, int);
550: int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
551: struct uio *, int);
552: int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
553: bus_dma_segment_t *, int, bus_size_t, int);
554: void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
555: void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
556: bus_addr_t, bus_size_t, int);
557:
558: /*
559: * DMA memory utility functions.
560: */
561: int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
562: bus_size_t, bus_dma_segment_t *, int, int *, int);
563: void (*_dmamem_free)(bus_dma_tag_t,
564: bus_dma_segment_t *, int);
565: int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
566: int, size_t, void **, int);
567: void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t);
568: paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
569: int, off_t, int, int);
570: };
571:
572: #define bus_dmamap_create(t, s, n, m, b, f, p) \
573: (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
574: #define bus_dmamap_destroy(t, p) \
575: (*(t)->_dmamap_destroy)((t), (p))
576: #define bus_dmamap_load(t, m, b, s, p, f) \
577: (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
578: #define bus_dmamap_load_mbuf(t, m, b, f) \
579: (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
580: #define bus_dmamap_load_uio(t, m, u, f) \
581: (*(t)->_dmamap_load_uio)((t), (m), (u), (f))
582: #define bus_dmamap_load_raw(t, m, sg, n, s, f) \
583: (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
584: #define bus_dmamap_unload(t, p) \
585: (*(t)->_dmamap_unload)((t), (p))
586: #define bus_dmamap_sync(t, p, o, l, ops) \
587: (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops))
588:
589: #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
590: (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
591: #define bus_dmamem_free(t, sg, n) \
592: (*(t)->_dmamem_free)((t), (sg), (n))
593: #define bus_dmamem_map(t, sg, n, s, k, f) \
594: (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
595: #define bus_dmamem_unmap(t, k, s) \
596: (*(t)->_dmamem_unmap)((t), (k), (s))
597: #define bus_dmamem_mmap(t, sg, n, o, p, f) \
598: (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
599:
600: #define bus_dmatag_subregion(t, mna, mxa, nt, f) EOPNOTSUPP
601: #define bus_dmatag_destroy(t)
602:
603: /*
604: * bus_dmamap_t
605: *
606: * Describes a DMA mapping.
607: */
608: struct emips_bus_dmamap {
609: /*
610: * PRIVATE MEMBERS: not for use my machine-independent code.
611: */
612: bus_size_t _dm_size; /* largest DMA transfer mappable */
613: int _dm_segcnt; /* number of segs this map can map */
614: bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */
615: bus_size_t _dm_boundary; /* don't cross this */
616: int _dm_flags; /* misc. flags */
617: struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */
618:
619: /*
620: * PUBLIC MEMBERS: these are used by machine-independent code.
621: */
622: bus_size_t dm_maxsegsz; /* largest possible segment */
623: bus_size_t dm_mapsize; /* size of the mapping */
624: int dm_nsegs; /* # valid segments in mapping */
625: bus_dma_segment_t dm_segs[1]; /* segments; variable length */
626: };
627:
628: #ifdef _EMIPS_BUS_DMA_PRIVATE
629: void emips_bus_dma_init(void);
630:
631: int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
632: bus_size_t, int, bus_dmamap_t *);
633: void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
634: int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
635: bus_size_t, struct proc *, int);
636: int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
637: struct mbuf *, int);
638: int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t,
639: struct uio *, int);
640: int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
641: bus_dma_segment_t *, int, bus_size_t, int);
642: void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
643: void _bus_dmamap_sync_r3k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
644: bus_size_t, int);
645: void _bus_dmamap_sync_r4k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
646: bus_size_t, int);
647:
648: int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
649: bus_size_t alignment, bus_size_t boundary,
650: bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
651: void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs,
652: int nsegs);
653: int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
654: int nsegs, size_t size, void **kvap, int flags);
655: void _bus_dmamem_unmap(bus_dma_tag_t tag, void *kva,
656: size_t size);
657: paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs,
658: int nsegs, off_t off, int prot, int flags);
659:
660: int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size,
661: bus_size_t alignment, bus_size_t boundary,
662: bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
663: vaddr_t low, vaddr_t high);
664:
665: extern struct emips_bus_dma_tag emips_default_bus_dma_tag;
666: #endif /* _EMIPS_BUS_DMA_PRIVATE */
667:
668: #endif /* !_EMIPS_BUS_H_ */
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