| /* |
| * Copyright (c) 2016 Wind River Systems, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @brief ARM CORTEX-M Series memory mapped register I/O operations |
| */ |
| |
| #ifndef _CORTEX_M_SYS_IO_H_ |
| #define _CORTEX_M_SYS_IO_H_ |
| |
| #if !defined(_ASMLANGUAGE) |
| |
| #include <sys_io.h> |
| |
| /* Memory mapped registers I/O functions */ |
| |
| static inline uint32_t sys_read32(mem_addr_t addr) |
| { |
| return *(volatile uint32_t *)addr; |
| } |
| |
| |
| static inline void sys_write32(uint32_t data, mem_addr_t addr) |
| { |
| *(volatile uint32_t *)addr = data; |
| } |
| |
| |
| /* Memory bit manipulation functions */ |
| |
| static inline void sys_set_bit(mem_addr_t addr, unsigned int bit) |
| { |
| uint32_t temp = *(volatile uint32_t *)addr; |
| |
| *(volatile uint32_t *)addr = temp | (1 << bit); |
| } |
| |
| static inline void sys_clear_bit(mem_addr_t addr, unsigned int bit) |
| { |
| uint32_t temp = *(volatile uint32_t *)addr; |
| |
| *(volatile uint32_t *)addr = temp & ~(1 << bit); |
| } |
| |
| #endif /* !_ASMLANGUAGE */ |
| |
| #endif /* _CORTEX_M_SYS_IO_H_ */ |