1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2003 Alan L. Cox <[email protected]>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #ifndef _MACHINE_SF_BUF_H_
32 #define _MACHINE_SF_BUF_H_
33
34 #ifdef __mips_n64 /* In 64 bit the whole memory is directly mapped */
35
36 static inline vm_offset_t
sf_buf_kva(struct sf_buf * sf)37 sf_buf_kva(struct sf_buf *sf)
38 {
39 vm_page_t m;
40
41 m = (vm_page_t)sf;
42 return (MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(m)));
43 }
44
45 static inline struct vm_page *
sf_buf_page(struct sf_buf * sf)46 sf_buf_page(struct sf_buf *sf)
47 {
48
49 return ((vm_page_t)sf);
50 }
51
52 #else /* !__mips_n64 */
53
54 static inline void
sf_buf_map(struct sf_buf * sf,int flags)55 sf_buf_map(struct sf_buf *sf, int flags)
56 {
57
58 pmap_qenter(sf->kva, &sf->m, 1);
59 }
60
61 static inline int
sf_buf_unmap(struct sf_buf * sf)62 sf_buf_unmap(struct sf_buf *sf)
63 {
64
65 pmap_qremove(sf->kva, 1);
66 return (1);
67 }
68
69 #endif /* __mips_n64 */
70
71 #endif /* !_MACHINE_SF_BUF_H_ */
72