1 /*
2 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef __MMIO_H__
32 #define __MMIO_H__
33
34 #include <arch_helpers.h>
35 #include <stdint.h>
36
mmio_write_8(uintptr_t addr,uint8_t value)37 static inline void mmio_write_8(uintptr_t addr, uint8_t value)
38 {
39 dsb();
40 isb();
41 *(volatile uint8_t*)addr = value;
42 }
43
mmio_read_8(uintptr_t addr)44 static inline uint8_t mmio_read_8(uintptr_t addr)
45 {
46 uint8_t val;
47
48 val = *(volatile uint8_t*)addr;
49 dsb();
50 isb();
51 return val;
52 }
53
mmio_write_32(uintptr_t addr,uint32_t value)54 static inline void mmio_write_32(uintptr_t addr, uint32_t value)
55 {
56 dsb();
57 isb();
58 *(volatile uint32_t*)addr = value;
59 }
60
mmio_read_32(uintptr_t addr)61 static inline uint32_t mmio_read_32(uintptr_t addr)
62 {
63 uint32_t val;
64
65 val = *(volatile uint32_t*)addr;
66 dsb();
67 isb();
68 return val;
69 }
70
mmio_write_64(uintptr_t addr,uint64_t value)71 static inline void mmio_write_64(uintptr_t addr, uint64_t value)
72 {
73 dsb();
74 isb();
75 *(volatile uint64_t*)addr = value;
76 }
77
mmio_read_64(uintptr_t addr)78 static inline uint64_t mmio_read_64(uintptr_t addr)
79 {
80 uint64_t val;
81
82 val = *(volatile uint64_t*)addr;
83 dsb();
84 isb();
85 return val;
86 }
87
88 #endif /* __MMIO_H__ */
89