Annotation of sys/arch/vax/include/sgmap.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sgmap.h,v 1.6 2003/11/10 21:05:06 miod Exp $ */
2: /* $NetBSD: sgmap.h,v 1.3 2000/05/17 21:22:18 matt Exp $ */
3:
4: /*-
5: * Copyright (c) 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: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the NetBSD
23: * Foundation, Inc. and its contributors.
24: * 4. Neither the name of The NetBSD Foundation nor the names of its
25: * contributors may be used to endorse or promote products derived
26: * from this software without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38: * POSSIBILITY OF SUCH DAMAGE.
39: */
40:
41: #ifndef _VAX_COMMON_SGMAPVAR_H
42: #define _VAX_COMMON_SGMAPVAR_H
43:
44: #include <sys/extent.h>
45: #include <machine/bus.h>
46: #include <machine/pte.h>
47:
48: /*
49: * A VAX SGMAP's state information. Nothing in the sgmap requires
50: * locking[*], with the exception of the extent map. Locking of the
51: * extent map is handled within the extent manager itself.
52: *
53: * [*] While the page table is a `global' resource, access to it is
54: * controlled by the extent map; once a region has been allocated from
55: * the map, that region is effectively `locked'.
56: */
57: struct vax_sgmap {
58: struct extent *aps_ex; /* extent map to manage sgva space */
59: pt_entry_t *aps_pt; /* page table */
60: bus_addr_t aps_sgvabase; /* base of the sgva space */
61: bus_size_t aps_sgvasize; /* size of the sgva space */
62: bus_addr_t aps_pa; /* Address in region */
63: unsigned int aps_flags; /* flags */
64: };
65:
66: void vax_sgmap_init(bus_dma_tag_t, struct vax_sgmap *,
67: const char *, bus_addr_t, bus_size_t, pt_entry_t *, bus_size_t);
68:
69: int vax_sgmap_alloc(bus_dmamap_t, bus_size_t,
70: struct vax_sgmap *, int);
71: void vax_sgmap_free(bus_dmamap_t, struct vax_sgmap *);
72:
73: int vax_sgmap_load(bus_dma_tag_t, bus_dmamap_t, void *,
74: bus_size_t, struct proc *, int, struct vax_sgmap *);
75:
76: int vax_sgmap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
77: struct mbuf *, int, struct vax_sgmap *);
78:
79: int vax_sgmap_load_uio(bus_dma_tag_t, bus_dmamap_t,
80: struct uio *, int, struct vax_sgmap *);
81:
82: int vax_sgmap_load_raw(bus_dma_tag_t, bus_dmamap_t,
83: bus_dma_segment_t *, int, bus_size_t, int, struct vax_sgmap *);
84:
85: void vax_sgmap_unload( bus_dma_tag_t, bus_dmamap_t,
86: struct vax_sgmap *);
87:
88: #endif /* _VAX_COMMON_SGMAPVAR_H */
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