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https://github.com/espressif/esp-idf.git
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86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define HAL_SWAP16(d) __builtin_bswap16((d))
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#define HAL_SWAP32(d) __builtin_bswap32((d))
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#define HAL_SWAP64(d) __builtin_bswap64((d))
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/** @cond */ //Doxy command to hide preprocessor definitions from docs */
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/**
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* @brief Macro to force a 32-bit read, modify, then write on a peripheral register
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*
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* Due to a GCC bug, the compiler may still try to optimize read/writes to peripheral register fields by using 8/16 bit
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* access, even if they are marked volatile (i.e., -fstrict-volatile-bitfields has no effect).
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*
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* For ESP chips, the peripheral bus only allows 32-bit read/writes. The following macro works around the compiler issue
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* by forcing a 32-bit read/modify/write.
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*
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* @note This macro should only be called on register fields of xxx_struct.h type headers, as it depends on the presence
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* of a 'val' field of the register union.
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* @note Current implementation reads into a uint32_t instead of copy base_reg direclty to temp_reg. The reason being
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* that C++ does not create a copy constructor for volatile structs.
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*/
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#define HAL_FORCE_MODIFY_U32_REG_FIELD(base_reg, reg_field, field_val) \
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{ \
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uint32_t temp_val = base_reg.val; \
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typeof(base_reg) temp_reg; \
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temp_reg.val = temp_val; \
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temp_reg.reg_field = (field_val); \
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(base_reg).val = temp_reg.val; \
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}
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/**
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* @brief Macro to force a 32-bit read on a peripheral register
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*
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* @note This macro should only be called on register fields of xxx_struct.h type headers. See description above for
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* more details.
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* @note Current implementation reads into a uint32_t. See description above for more details.
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*/
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#define HAL_FORCE_READ_U32_REG_FIELD(base_reg, reg_field) ({ \
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uint32_t temp_val = base_reg.val; \
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typeof(base_reg) temp_reg; \
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temp_reg.val = temp_val; \
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temp_reg.reg_field; \
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})
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/** @endcond */
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/**
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* @brief Copy data from memory array to another memory
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*
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* This helps bypass the -Warray-bounds, -Wstringop-overread and -Wstringop-overflow bugs.
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*
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* @param dst_mem Pointer to the destination of data
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* @param src_mem Pointer to the source of data to be copied
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* @param len The number of bytes to be copied
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* @return a pointer to destination
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*/
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#define hal_memcpy(dst_mem, src_mem, len) (__extension__({memcpy(dst_mem, src_mem, len);}))
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/**
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* @brief Sets the first num bytes of the block of memory pointed by ptr to the specified value
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*
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* This helps bypass the -Warray-bounds, -Wstringop-overread and -Wstringop-overflow bugs.
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*
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* @param dst_reg Pointer to the block of memory to fill
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* @param value The value to be set.
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* @param len The number of bytes to be copied
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* @return a pointer to the memory area
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*/
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#define hal_memset(dst_mem, value, len) (__extension__({memset(dst_mem, value, len);}))
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#ifdef __cplusplus
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}
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#endif
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