2 * Copyright (c) 2015 The FreeBSD Foundation
4 * This software was developed by Andrew Turner under
5 * sponsorship from the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _MACHINE_IODEV_H_
30 #define _MACHINE_IODEV_H_
32 #define iodev_read_1(a) \
35 __asm __volatile("ldrb %w0, [%1]" : "=&r" (val) : "r"(a)); \
39 #define iodev_read_2(a) \
42 __asm __volatile("ldrh %w0, [%1]" : "=&r" (val) : "r"(a)); \
46 #define iodev_read_4(a) \
49 __asm __volatile("ldr %w0, [%1]" : "=&r" (val) : "r"(a)); \
53 #define iodev_write_1(a, v) \
54 __asm __volatile("strb %w0, [%1]" :: "r" (v), "r"(a))
56 #define iodev_write_2(a, v) \
57 __asm __volatile("strh %w0, [%1]" :: "r" (v), "r"(a))
59 #define iodev_write_4(a, v) \
60 __asm __volatile("str %w0, [%1]" :: "r" (v), "r"(a))
62 #endif /* _MACHINE_IODEV_H_ */