io_reg.h

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/*
 * Copyright (C) 2021 Otto-von-Guericke-Universität Magdeburg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#ifndef IO_REG_H
#define IO_REG_H
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define REG_ATOMIC_XOR_BIT      (0x1000U)
 
#define REG_ATOMIC_SET_BIT      (0x2000U)
 
#define REG_ATOMIC_CLEAR_BIT    (0x3000U)
 
#define REG_ATOMIC_XOR(reg)     ((volatile uint32_t *)(((uintptr_t)(reg)) | REG_ATOMIC_XOR_BIT))
 
#define REG_ATOMIC_SET(reg)     ((volatile uint32_t *)(((uintptr_t)(reg)) | REG_ATOMIC_SET_BIT))
 
#define REG_ATOMIC_CLEAR(reg)   ((volatile uint32_t *)(((uintptr_t)(reg)) | REG_ATOMIC_CLEAR_BIT))
 
static inline void io_reg_atomic_xor(volatile uint32_t *reg, uint32_t mask)
{
    *REG_ATOMIC_XOR(reg) = mask;
}
 
static inline void io_reg_atomic_set(volatile uint32_t *reg, uint32_t mask)
{
    *REG_ATOMIC_SET(reg) = mask;
}
 
static inline void io_reg_atomic_clear(volatile uint32_t *reg, uint32_t mask)
{
    *REG_ATOMIC_CLEAR(reg) = mask;
}
 
static inline void io_reg_write_dont_corrupt(volatile uint32_t *reg, uint32_t value, uint32_t mask)
{
    *reg = (*reg & (~mask)) | value;
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* IO_REG_H */