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 #include <stdint.h> 31 #include <types_ext.h> 32 33 /* 34 * IO access macro, please avoid using this macro, since it's going to be 35 * deprecated. 36 */ 37 #define IO(addr) (*((volatile unsigned long *)(addr))) 38 39 static inline void write8(uint8_t val, vaddr_t addr) 40 { 41 *(volatile uint8_t *)addr = val; 42 } 43 44 static inline void write16(uint16_t val, vaddr_t addr) 45 { 46 *(volatile uint16_t *)addr = val; 47 } 48 49 static inline void write32(uint32_t val, vaddr_t addr) 50 { 51 *(volatile uint32_t *)addr = val; 52 } 53 54 static inline uint8_t read8(vaddr_t addr) 55 { 56 return *(volatile uint8_t *)addr; 57 } 58 59 static inline uint16_t read16(vaddr_t addr) 60 { 61 return *(volatile uint16_t *)addr; 62 } 63 64 static inline uint32_t read32(vaddr_t addr) 65 { 66 return *(volatile uint32_t *)addr; 67 } 68 69 #endif /*IO_H*/ 70