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 <stdint.h> 35 36 static inline void mmio_write_8(uintptr_t addr, uint8_t value) 37 { 38 *(volatile uint8_t*)addr = value; 39 } 40 41 static inline uint8_t mmio_read_8(uintptr_t addr) 42 { 43 return *(volatile uint8_t*)addr; 44 } 45 46 static inline void mmio_write_16(uintptr_t addr, uint16_t value) 47 { 48 *(volatile uint16_t*)addr = value; 49 } 50 51 static inline uint16_t mmio_read_16(uintptr_t addr) 52 { 53 return *(volatile uint16_t*)addr; 54 } 55 56 static inline void mmio_write_32(uintptr_t addr, uint32_t value) 57 { 58 *(volatile uint32_t*)addr = value; 59 } 60 61 static inline uint32_t mmio_read_32(uintptr_t addr) 62 { 63 return *(volatile uint32_t*)addr; 64 } 65 66 static inline void mmio_write_64(uintptr_t addr, uint64_t value) 67 { 68 *(volatile uint64_t*)addr = value; 69 } 70 71 static inline uint64_t mmio_read_64(uintptr_t addr) 72 { 73 return *(volatile uint64_t*)addr; 74 } 75 76 static inline void mmio_clrbits_32(uintptr_t addr, uint32_t clear) 77 { 78 mmio_write_32(addr, mmio_read_32(addr) & ~clear); 79 } 80 81 static inline void mmio_setbits_32(uintptr_t addr, uint32_t set) 82 { 83 mmio_write_32(addr, mmio_read_32(addr) | set); 84 } 85 86 static inline void mmio_clrsetbits_32(uintptr_t addr, 87 uint32_t clear, 88 uint32_t set) 89 { 90 mmio_write_32(addr, (mmio_read_32(addr) & ~clear) | set); 91 } 92 93 #endif /* __MMIO_H__ */ 94