5b6c59397e
Add new common inline functions sys_set_bits and set_clear_bits to set and clear multiple bits via bit mask in single function call. Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
131 lines
2.6 KiB
C
131 lines
2.6 KiB
C
/*
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* Copyright (c) 2020, Wind River Systems, Inc.
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* Copyright (c) 2017, Oticon A/S
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* Copyright (c) 2020, Synopsys
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* Memory bits manipulation functions in non-arch-specific C code */
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#ifndef ZEPHYR_INCLUDE_ARCH_COMMON_SYS_BITOPS_H_
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#define ZEPHYR_INCLUDE_ARCH_COMMON_SYS_BITOPS_H_
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#ifndef _ASMLANGUAGE
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#include <toolchain.h>
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#include <zephyr/types.h>
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#include <sys/sys_io.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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static ALWAYS_INLINE void sys_set_bit(mem_addr_t addr, unsigned int bit)
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{
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uint32_t temp = *(volatile uint32_t *)addr;
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*(volatile uint32_t *)addr = temp | (1 << bit);
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}
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static ALWAYS_INLINE void sys_clear_bit(mem_addr_t addr, unsigned int bit)
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{
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uint32_t temp = *(volatile uint32_t *)addr;
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*(volatile uint32_t *)addr = temp & ~(1 << bit);
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}
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static ALWAYS_INLINE int sys_test_bit(mem_addr_t addr, unsigned int bit)
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{
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uint32_t temp = *(volatile uint32_t *)addr;
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return temp & (1 << bit);
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}
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static ALWAYS_INLINE void sys_set_bits(mem_addr_t addr, unsigned int mask)
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{
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uint32_t temp = *(volatile uint32_t *)addr;
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*(volatile uint32_t *)addr = temp | mask;
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}
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static ALWAYS_INLINE void sys_clear_bits(mem_addr_t addr, unsigned int mask)
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{
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uint32_t temp = *(volatile uint32_t *)addr;
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*(volatile uint32_t *)addr = temp & ~mask;
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}
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static ALWAYS_INLINE
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void sys_bitfield_set_bit(mem_addr_t addr, unsigned int bit)
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{
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/* Doing memory offsets in terms of 32-bit values to prevent
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* alignment issues
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*/
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sys_set_bit(addr + ((bit >> 5) << 2), bit & 0x1F);
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}
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static ALWAYS_INLINE
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void sys_bitfield_clear_bit(mem_addr_t addr, unsigned int bit)
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{
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sys_clear_bit(addr + ((bit >> 5) << 2), bit & 0x1F);
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}
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static ALWAYS_INLINE
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int sys_bitfield_test_bit(mem_addr_t addr, unsigned int bit)
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{
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return sys_test_bit(addr + ((bit >> 5) << 2), bit & 0x1F);
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}
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static ALWAYS_INLINE
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int sys_test_and_set_bit(mem_addr_t addr, unsigned int bit)
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{
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int ret;
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ret = sys_test_bit(addr, bit);
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sys_set_bit(addr, bit);
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return ret;
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}
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static ALWAYS_INLINE
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int sys_test_and_clear_bit(mem_addr_t addr, unsigned int bit)
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{
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int ret;
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ret = sys_test_bit(addr, bit);
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sys_clear_bit(addr, bit);
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return ret;
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}
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static ALWAYS_INLINE
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int sys_bitfield_test_and_set_bit(mem_addr_t addr, unsigned int bit)
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{
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int ret;
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ret = sys_bitfield_test_bit(addr, bit);
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sys_bitfield_set_bit(addr, bit);
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return ret;
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}
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static ALWAYS_INLINE
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int sys_bitfield_test_and_clear_bit(mem_addr_t addr, unsigned int bit)
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{
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int ret;
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ret = sys_bitfield_test_bit(addr, bit);
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sys_bitfield_clear_bit(addr, bit);
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return ret;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ASMLANGUAGE */
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#endif /* ZEPHYR_INCLUDE_ARCH_COMMON_SYS_BITOPS_H_ */
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