1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1991-1994, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/promif.h>
30#include <sys/promimpl.h>
31
32/*
33 * Mapping routines suitable for implementations using 2-cell physical
34 * address formats.  Use of these routines makes the caller
35 * platform-dependent.  The implementation of these routines is
36 * a bit sun-hardware centric, for historical use by SunOS and standalones.
37 */
38
39caddr_t
40prom_map(caddr_t virthint, unsigned long long physaddr, u_int size)
41{
42	caddr_t virt;
43
44	/*
45	 * If no virthint, allocate it; otherwise claim it,
46	 * the physical address is assumed to be a device or
47	 * already claimed, or not appearing in a resource list.
48	 */
49	if (virthint == (caddr_t)0)  {
50		if ((virt = prom_allocate_virt((u_int)1, size)) == 0)
51			return ((caddr_t)0);
52	} else {
53		virt = virthint;
54		if (prom_claim_virt(size, virt) != virt)
55			return ((caddr_t)0);
56	}
57
58	if (prom_map_phys(-1, size, virt, physaddr) != 0) {
59		/*
60		 * The map operation failed, free the virtual
61		 * addresses we allocated or claimed.
62		 */
63		(void) prom_free_virt(size, virt);
64		return ((caddr_t)0);
65	}
66	return (virt);
67}
68
69void
70prom_unmap(caddr_t virt, u_int size)
71{
72	(void) prom_unmap_virt(size, virt);
73	prom_free_virt(size, virt);
74}
75