1 /* $NetBSD: malta_dma.c,v 1.9 2011/07/01 18:46:35 dyoung Exp $ */
2
3 /*-
4 * Copyright (c) 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.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Platform-specific DMA support for the MIPS Malta.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: malta_dma.c,v 1.9 2011/07/01 18:46:35 dyoung Exp $");
38
39 #include <sys/param.h>
40 #include <sys/device.h>
41
42 #define _MIPS_BUS_DMA_PRIVATE
43 #include <sys/bus.h>
44
45 #include <dev/isa/isavar.h>
46
47 #include <evbmips/malta/maltareg.h>
48 #include <evbmips/malta/maltavar.h>
49
50 void
malta_dma_init(struct malta_config * acp)51 malta_dma_init(struct malta_config *acp)
52 {
53 bus_dma_tag_t t;
54
55 /*
56 * Initialize the DMA tag used for PCI DMA.
57 */
58 t = &acp->mc_pci_dmat;
59 t->_cookie = acp;
60 t->_wbase = MALTA_DMA_PCI_PCIBASE;
61 t->_bounce_alloc_lo = MALTA_DMA_PCI_PHYSBASE;
62 t->_bounce_alloc_hi = MALTA_DMA_PCI_PHYSBASE + MALTA_DMA_PCI_SIZE;
63 t->_dmamap_ops = mips_bus_dmamap_ops;
64 t->_dmamem_ops = mips_bus_dmamem_ops;
65 t->_dmatag_ops = mips_bus_dmatag_ops;
66 }
67