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 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 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 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 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 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 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
