xref: /freebsd/tools/bus_space/C/lang.c (revision 864c53ead899f7838cd2e1cca3b485a4a82f5cdc)
1 /*-
2  * Copyright (c) 2014 Marcel Moolenaar
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <sys/types.h>
31 #include <errno.h>
32 
33 #include "bus_space.h"
34 #include "libbus_space.h"
35 
36 int
37 bus_space_read_1(int rid, long ofs)
38 {
39 	uint8_t val;
40 
41 	return ((!bs_read(rid, ofs, &val, sizeof(val))) ? -1 : (int)val);
42 }
43 
44 int
45 bus_space_read_2(int rid, long ofs)
46 {
47 	uint16_t val;
48 
49 	return ((!bs_read(rid, ofs, &val, sizeof(val))) ? -1 : (int)val);
50 }
51 
52 int64_t
53 bus_space_read_4(int rid, long ofs)
54 {
55 	uint32_t val;
56 
57 	return ((!bs_read(rid, ofs, &val, sizeof(val))) ? -1 : (int64_t)val);
58 }
59 
60 int
61 bus_space_write_1(int rid, long ofs, uint8_t val)
62 {
63 
64 	return ((!bs_write(rid, ofs, &val, sizeof(val))) ? errno : 0);
65 }
66 
67 int
68 bus_space_write_2(int rid, long ofs, uint16_t val)
69 {
70 
71 	return ((!bs_write(rid, ofs, &val, sizeof(val))) ? errno : 0);
72 }
73 
74 int
75 bus_space_write_4(int rid, long ofs, uint32_t val)
76 {
77 
78 	return ((!bs_write(rid, ofs, &val, sizeof(val))) ? errno : 0);
79 }
80 
81 int
82 bus_space_map(const char *dev)
83 {
84 
85 	return (bs_map(dev));
86 }
87 
88 int
89 bus_space_unmap(int rid)
90 {
91 
92 	return ((!bs_unmap(rid)) ? errno : 0);
93 }
94 
95 int
96 bus_space_subregion(int rid, long ofs, long sz)
97 {
98 
99 	return (bs_subregion(rid, ofs, sz));
100 }
101