octeon_dma.c revision 1.3 
1/*	$NetBSD: octeon_dma.c,v 1.3 2019/12/15 16:48:26 tsutsui 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 OCTEON.  Copied from MALTA code.
34 */
35
36#include <sys/cdefs.h>
37__KERNEL_RCSID(0, "$NetBSD: octeon_dma.c,v 1.3 2019/12/15 16:48:26 tsutsui Exp $");
38
39#include <sys/param.h>
40#include <sys/systm.h>
41
42#include <mips/cpuregs.h>
43
44#define	_MIPS_BUS_DMA_PRIVATE
45#include <sys/bus.h>
46
47#include <mips/cavium/octeonvar.h>
48
49void
50octeon_dma_init(struct octeon_config *mcp)
51{
52	bus_dma_tag_t t;
53
54	/* XXX need 32bit tag? */
55	t = &mcp->mc_iobus_dmat;
56	t->_cookie = mcp;
57	t->_wbase = 0;
58	t->_bounce_alloc_lo = 0;
59	t->_bounce_alloc_hi = 0;
60	t->_dmamap_ops = mips_bus_dmamap_ops;
61	t->_dmamem_ops = mips_bus_dmamem_ops;
62	t->_dmatag_ops = mips_bus_dmatag_ops;
63
64	/* XXX struct copy */
65	mcp->mc_bootbus_dmat = mcp->mc_iobus_dmat;
66	mcp->mc_core1_dmat = mcp->mc_iobus_dmat;
67	mcp->mc_fpa_dmat = mcp->mc_iobus_dmat;
68
69#ifdef __mips_n32
70	mcp->mc_fpa_dmat._bounce_alloc_hi = round_page(MIPS_PHYS_MASK);
71#endif
72}
73