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cpu/riscv_common: Add bit set and clear functions

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This commit is contained in:
Koen Zandberg 2021-02-17 13:43:50 +01:00
parent c1d81cfb56
commit 9239c2fe14
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1 changed files with 24 additions and 0 deletions
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24
cpu/riscv_common/include/cpu.h
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@ -61,6 +61,30 @@ static inline void cpu_print_last_instruction(void)
/* This function must exist else RIOT won't compile */
}
/**
* @brief Convenience function to set bit flags in a register
*
* @param reg register to set bits in
* @param mask bits to set in the register
*/
static inline __attribute__((always_inline))
void cpu_reg_enable_bits(volatile uint32_t *reg, uint32_t mask)
{
__atomic_fetch_or(reg, mask, __ATOMIC_RELAXED);
}
/**
* @brief Convenience function to clear bit flags in a register
*
* @param reg register to clear bits in
* @param mask bits to clear in the register
*/
static inline __attribute__((always_inline))
void cpu_reg_disable_bits(volatile uint32_t *reg, uint32_t mask)
{
__atomic_fetch_and(reg, ~mask, __ATOMIC_RELAXED);
}
#ifdef __cplusplus
}
#endif