1 #-
2 # Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
3 #
4 # Redistribution and use in source and binary forms, with or without
5 # modification, are permitted provided that the following conditions
6 # are met:
7 # 1. Redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer.
9 # 2. Redistributions in binary form must reproduce the above copyright
10 # notice, this list of conditions and the following disclaimer in the
11 # documentation and/or other materials provided with the distribution.
12 #
13 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 # SUCH DAMAGE.
24 #
25 # $FreeBSD$
26 #
27
28 INTERFACE nvmem;
29
30 #
31 # Default implementations of some methods.
32 #
33 CODE {
34 static int
35 null_nvmem_read(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
36 {
37
38 return (ENXIO);
39 }
40
41 static int
42 null_nvmem_write(device_t dev __unused, uint32_t offset __unused, uint32_t size __unused, uint8_t *buffer __unused)
43 {
44
45 return (ENXIO);
46 }
47 };
48
49 #
50 # Read
51 #
52 METHOD int read {
53 device_t dev;
54 uint32_t offset;
55 uint32_t size;
56 uint8_t *buffer;
57 } DEFAULT null_nvmem_read;
58
59 #
60 # Write
61 #
62 METHOD int write {
63 device_t dev;
64 uint32_t offset;
65 uint32_t size;
66 uint8_t *buffer;
67 } DEFAULT null_nvmem_write;
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