1/*-
2 * Copyright (c) 2015 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Andrew Turner under
6 * sponsorship from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32#ifndef _MACHINE_IODEV_H_
33#define	_MACHINE_IODEV_H_
34
35#define	iodev_read_1(a)							\
36({									\
37	uint8_t val;							\
38	__asm __volatile("ldrb	%w0, [%1]" : "=&r" (val) : "r"(a));	\
39	val;								\
40})
41
42#define	iodev_read_2(a)							\
43({									\
44	uint16_t val;							\
45	__asm __volatile("ldrh	%w0, [%1]" : "=&r" (val) : "r"(a));	\
46	val;								\
47})
48
49#define	iodev_read_4(a)							\
50({									\
51	uint32_t val;							\
52	__asm __volatile("ldr	%w0, [%1]" : "=&r" (val) : "r"(a));	\
53	val;								\
54})
55
56#define	iodev_write_1(a, v)						\
57	__asm __volatile("strb	%w0, [%1]" :: "r" (v), "r"(a))
58
59#define	iodev_write_2(a, v)						\
60	__asm __volatile("strh	%w0, [%1]" :: "r" (v), "r"(a))
61
62#define	iodev_write_4(a, v)						\
63	__asm __volatile("str	%w0, [%1]" :: "r" (v), "r"(a))
64
65#endif /* _MACHINE_IODEV_H_ */
66