summaryrefslogtreecommitdiff
path: root/sys/arch/sparc/include/bus_defs.h
blob: 9588e56bbacf02c1dd5df91958b4441ed535253d (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
/*	$NetBSD: bus_defs.h,v 1.2 2019/09/23 16:17:57 skrll Exp $	*/

/*-
 * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

/*
 * Copyright (c) 1996 Charles M. Hannum.  All rights reserved.
 * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou
 *	for the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * 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.
 */

#ifndef _SPARC_BUS_DEFS_H_
#define _SPARC_BUS_DEFS_H_

/*
 * Bus address and size types
 */
typedef	u_long		bus_space_handle_t;

#define PRIxBSH		"lx"

typedef uint64_t	bus_addr_t;
typedef u_long		bus_size_t;

#define PRIxBUSADDR	PRIx64
#define PRIxBUSSIZE	"lx"
#define PRIuBUSSIZE	"lu"

#define	SPARC_BUS_SPACE	0

/* bus_addr_t is extended to 64-bits and has the iospace encoded in it */
#define	BUS_ADDR_IOSPACE(x)	((x)>>32)
#define	BUS_ADDR_PADDR(x)	((x)&0xffffffff)
#define	BUS_ADDR(io, pa)	\
	((((uint64_t)(uint32_t)(io))<<32) | (uint32_t)(pa))

#define __BUS_SPACE_HAS_STREAM_METHODS	1

/*
 * Access methods for bus resources and address space.
 */
typedef struct sparc_bus_space_tag	*bus_space_tag_t;

struct sparc_bus_space_tag {
	void		*cookie;
	bus_space_tag_t	parent;

	/*
	 * Windows onto the parent bus that this tag maps.  If ranges
	 * is non-NULL, the address will be translated, and recursively
	 * mapped via the parent tag.
	 */
	struct openprom_range *ranges;
	int nranges;

	int	(*sparc_bus_map)(
				bus_space_tag_t,
				bus_addr_t,
				bus_size_t,
				int,			/*flags*/
				vaddr_t,		/*preferred vaddr*/
				bus_space_handle_t *);
	int	(*sparc_bus_unmap)(
				bus_space_tag_t,
				bus_space_handle_t,
				bus_size_t);
	int	(*sparc_bus_subregion)(
				bus_space_tag_t,
				bus_space_handle_t,
				bus_size_t,		/*offset*/
				bus_size_t,		/*size*/
				bus_space_handle_t *);

	void	(*sparc_bus_barrier)(
				bus_space_tag_t,
				bus_space_handle_t,
				bus_size_t,		/*offset*/
				bus_size_t,		/*size*/
				int);			/*flags*/

	paddr_t	(*sparc_bus_mmap)(
				bus_space_tag_t,
				bus_addr_t,
				off_t,
				int,			/*prot*/
				int);			/*flags*/

	void	*(*sparc_intr_establish)(
				bus_space_tag_t,
				int,			/*bus-specific intr*/
				int,			/*device class level,
							  see machine/intr.h*/
				int (*)(void *),	/*handler*/
				void *,			/*handler arg*/
				void (*)(void));	/*optional fast vector*/

	uint8_t (*sparc_read_1)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	uint16_t (*sparc_read_2)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	uint32_t (*sparc_read_4)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	uint64_t (*sparc_read_8)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	void	(*sparc_write_1)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint8_t value);

	void	(*sparc_write_2)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint16_t value);

	void	(*sparc_write_4)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint32_t value);

	void	(*sparc_write_8)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint64_t value);
};

/* flags for bus space map functions */
#define BUS_SPACE_MAP_BUS1	0x0100	/* placeholders for bus functions... */
#define BUS_SPACE_MAP_BUS2	0x0200
#define BUS_SPACE_MAP_BUS3	0x0400
#define BUS_SPACE_MAP_LARGE	0x0800	/* map outside IODEV range */


/* flags for bus_space_barrier() */
#define	BUS_SPACE_BARRIER_READ	0x01		/* force read barrier */
#define	BUS_SPACE_BARRIER_WRITE	0x02		/* force write barrier */

#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)

/*
 * Flags used in various bus DMA methods.
 */
#define	BUS_DMA_WAITOK		0x000	/* safe to sleep (pseudo-flag) */
#define	BUS_DMA_NOWAIT		0x001	/* not safe to sleep */
#define	BUS_DMA_ALLOCNOW	0x002	/* perform resource allocation now */
#define	BUS_DMA_COHERENT	0x004	/* hint: map memory DMA coherent */
#define	BUS_DMA_STREAMING	0x008	/* hint: sequential, unidirectional */
#define	BUS_DMA_BUS1		0x010	/* placeholders for bus functions... */
#define	BUS_DMA_BUS2		0x020
#define	BUS_DMA_BUS3		0x040
#define	BUS_DMA_BUS4		0x080
#define	BUS_DMA_READ		0x100	/* mapping is device -> memory only */
#define	BUS_DMA_WRITE		0x200	/* mapping is memory -> device only */
#define	BUS_DMA_NOCACHE		0x400	/* hint: map non-cached memory */

/* For devices that have a 24-bit address space */
#define BUS_DMA_24BIT		BUS_DMA_BUS1

/* Internal flag: current DVMA address is equal to the KVA buffer address */
#define _BUS_DMA_DIRECTMAP	BUS_DMA_BUS2

/* Forwards needed by prototypes below. */
struct mbuf;
struct uio;

/*
 * Operations performed by bus_dmamap_sync().
 */
#define	BUS_DMASYNC_PREREAD	0x01	/* pre-read synchronization */
#define	BUS_DMASYNC_POSTREAD	0x02	/* post-read synchronization */
#define	BUS_DMASYNC_PREWRITE	0x04	/* pre-write synchronization */
#define	BUS_DMASYNC_POSTWRITE	0x08	/* post-write synchronization */

typedef struct sparc_bus_dma_tag	*bus_dma_tag_t;
typedef struct sparc_bus_dmamap		*bus_dmamap_t;

#define BUS_DMA_TAG_VALID(t)    ((t) != (bus_dma_tag_t)0)

/*
 *	bus_dma_segment_t
 *
 *	Describes a single contiguous DMA transaction.  Values
 *	are suitable for programming into DMA registers.
 */
struct sparc_bus_dma_segment {
	bus_addr_t	ds_addr;	/* DVMA address */
	bus_size_t	ds_len;		/* length of transfer */
	bus_size_t	_ds_sgsize;	/* size of allocated DVMA segment */
	void		*_ds_mlist;	/* page list when dmamem_alloc'ed */
	vaddr_t		_ds_va;		/* VA when dmamem_map'ed */
};
typedef struct sparc_bus_dma_segment	bus_dma_segment_t;


/*
 *	bus_dma_tag_t
 *
 *	A machine-dependent opaque type describing the implementation of
 *	DMA for a given bus.
 */
struct sparc_bus_dma_tag {
	void	*_cookie;		/* cookie used in the guts */

	/*
	 * DMA mapping methods.
	 */
	int	(*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
		    bus_size_t, bus_size_t, int, bus_dmamap_t *);
	void	(*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
	int	(*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
		    bus_size_t, struct proc *, int);
	int	(*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
		    struct mbuf *, int);
	int	(*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
		    struct uio *, int);
	int	(*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
		    bus_dma_segment_t *, int, bus_size_t, int);
	void	(*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
	void	(*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
		    bus_addr_t, bus_size_t, int);

	/*
	 * DMA memory utility functions.
	 */
	int	(*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
		    bus_size_t, bus_dma_segment_t *, int, int *, int);
	void	(*_dmamem_free)(bus_dma_tag_t,
		    bus_dma_segment_t *, int);
	int	(*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
		    int, size_t, void **, int);
	void	(*_dmamem_unmap)(bus_dma_tag_t, void *, size_t);
	paddr_t	(*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
		    int, off_t, int, int);
};

/*
 *	bus_dmamap_t
 *
 *	Describes a DMA mapping.
 */
struct sparc_bus_dmamap {
	/*
	 * PRIVATE MEMBERS: not for use by machine-independent code.
	 */
	bus_size_t	_dm_size;	/* largest DMA transfer mappable */
	int		_dm_segcnt;	/* number of segs this map can map */
	bus_size_t	_dm_maxmaxsegsz; /* fixed largest possible segment */
	bus_size_t	_dm_boundary;	/* don't cross this */
	int		_dm_flags;	/* misc. flags */

	void		*_dm_cookie;	/* cookie for bus-specific functions */

	u_long		_dm_align;	/* DVMA alignment; must be a
					   multiple of the page size */
	u_long		_dm_ex_start;	/* constraints on DVMA map */
	u_long		_dm_ex_end;	/* allocations; used by the VME bus
					   driver and by the IOMMU driver
					   when mapping 24-bit devices */

	/*
	 * PUBLIC MEMBERS: these are used by machine-independent code.
	 */
	bus_size_t	dm_maxsegsz;	/* largest possible segment */
	bus_size_t	dm_mapsize;	/* size of the mapping */
	int		dm_nsegs;	/* # valid segments in mapping */
	bus_dma_segment_t dm_segs[1];	/* segments; variable length */
};

#endif /* _SPARC_BUS_DEFS_H_ */