1 /* 2 * Copyright (c) 2014, Linaro Limited 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef IO_H 28 #define IO_H 29 30 static inline void write8(uint8_t val, vaddr_t addr) 31 { 32 *(volatile uint8_t *)addr = val; 33 } 34 35 static inline void write16(uint16_t val, vaddr_t addr) 36 { 37 *(volatile uint16_t *)addr = val; 38 } 39 40 static inline void write32(uint32_t val, vaddr_t addr) 41 { 42 *(volatile uint32_t *)addr = val; 43 } 44 45 static inline uint8_t read8(vaddr_t addr) 46 { 47 return *(volatile uint8_t *)addr; 48 } 49 50 static inline uint16_t read16(vaddr_t addr) 51 { 52 return *(volatile uint16_t *)addr; 53 } 54 55 static inline uint32_t read32(vaddr_t addr) 56 { 57 return *(volatile uint32_t *)addr; 58 } 59 60 #endif /*IO_H*/ 61