Annotation of sys/arch/alpha/dev/sgmapvar.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sgmapvar.h,v 1.4 2006/04/04 21:18:43 brad Exp $ */
2: /* $NetBSD: sgmapvar.h,v 1.10 1998/08/14 16:50:02 thorpej 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 _ALPHA_COMMON_SGMAPVAR_H
42: #define _ALPHA_COMMON_SGMAPVAR_H
43:
44: #include <sys/extent.h>
45: #include <machine/bus.h>
46:
47: /*
48: * Bits n:13 of the DMA address are the index of the PTE into
49: * the SGMAP page table.
50: */
51: #define SGMAP_ADDR_PTEIDX_SHIFT 13
52:
53: /*
54: * An Alpha SGMAP's state information. Nothing in the sgmap requires
55: * locking[*], with the exception of the extent map. Locking of the
56: * extent map is handled within the extent manager itself.
57: *
58: * [*] While the page table is a `global' resource, access to it is
59: * controlled by the extent map; once a region has been allocated from
60: * the map, that region is effectively `locked'.
61: */
62: struct alpha_sgmap {
63: struct extent *aps_ex; /* extent map to manage sgva space */
64: void *aps_pt; /* page table */
65: bus_addr_t aps_ptpa; /* page table physical address */
66: bus_addr_t aps_sgvabase; /* base of the sgva space */
67: bus_size_t aps_sgvasize; /* size of the sgva space */
68: bus_addr_t aps_wbase; /* base of the dma window */
69: };
70:
71: extern vaddr_t alpha_sgmap_prefetch_spill_page_va;
72: extern bus_addr_t alpha_sgmap_prefetch_spill_page_pa;
73:
74: void alpha_sgmap_init(bus_dma_tag_t, struct alpha_sgmap *,
75: const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *,
76: bus_size_t);
77:
78: int alpha_sgmap_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
79: bus_size_t, int, bus_dmamap_t *);
80: void alpha_sgmap_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
81:
82: #endif /* _ALPHA_COMMON_SGMAPVAR_H */
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