octeon_dma.c revision 1.2 
1/*	$NetBSD: octeon_dma.c,v 1.2 2016/07/11 16:15:35 matt 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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the NetBSD
21 *	Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * Platform-specific DMA support for the MIPS OCTEON.  Copied from MALTA code.
41 */
42
43#include <sys/cdefs.h>
44__KERNEL_RCSID(0, "$NetBSD: octeon_dma.c,v 1.2 2016/07/11 16:15:35 matt Exp $");
45
46#include <sys/param.h>
47#include <sys/systm.h>
48
49#include <mips/cpuregs.h>
50
51#define	_MIPS_BUS_DMA_PRIVATE
52#include <sys/bus.h>
53
54#include <mips/cavium/octeonvar.h>
55
56void
57octeon_dma_init(struct octeon_config *mcp)
58{
59	bus_dma_tag_t t;
60
61	/* XXX need 32bit tag? */
62	t = &mcp->mc_iobus_dmat;
63	t->_cookie = mcp;
64	t->_wbase = 0;
65	t->_bounce_alloc_lo = 0;
66	t->_bounce_alloc_hi = 0;
67	t->_dmamap_ops = mips_bus_dmamap_ops;
68	t->_dmamem_ops = mips_bus_dmamem_ops;
69	t->_dmatag_ops = mips_bus_dmatag_ops;
70
71	/* XXX struct copy */
72	mcp->mc_bootbus_dmat = mcp->mc_iobus_dmat;
73	mcp->mc_core1_dmat = mcp->mc_iobus_dmat;
74	mcp->mc_fpa_dmat = mcp->mc_iobus_dmat;
75
76#ifdef __mips_n32
77	mcp->mc_fpa_dmat._bounce_alloc_hi = round_page(MIPS_PHYS_MASK);
78#endif
79}
80