/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2019 Rockchip Electronics Co., Ltd
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*/
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#ifndef _ROCKCHIP_CRYPTO_V2_UTIL_H_
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#define _ROCKCHIP_CRYPTO_V2_UTIL_H_
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/************************ Defines ******************************/
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/* invers the bytes on a word- used for output from HASH */
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#ifdef BIG__ENDIAN
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#define UTIL_INVERSE_UINT32_BYTES(val) (val)
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#else
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#define UTIL_INVERSE_UINT32_BYTES(val) \
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(((val) >> 24) | (((val) & 0x00FF0000) >> 8) | \
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(((val) & 0x0000FF00) << 8) | (((val) & 0x000000FF) << 24))
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#endif
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/* invers the bytes on a word - used for input data for HASH */
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#ifdef BIG__ENDIAN
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#define UTIL_REVERT_UINT32_BYTES(val) \
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(((val) >> 24) | (((val) & 0x00FF0000) >> 8) | \
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(((val) & 0x0000FF00) << 8) | (((val) & 0x000000FF) << 24))
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#else
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#define UTIL_REVERT_UINT32_BYTES(val) (val)
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#endif
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/* the minimum and maximum macros */
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#undef min
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#define min(a, b) (((a) < (b)) ? (a) : (b))
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#undef max
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#define max(a, b) (((a) > (b)) ? (a) : (b))
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/* MACRO to count one bits */
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#define COUNT_ONE_BITS(number, bit_count) \
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do { \
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u32 tmp_num = number; \
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bit_count = 0; \
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while (tmp_num) { \
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tmp_num = tmp_num & (tmp_num - 1); \
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bit_count = bit_count + 1; \
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} \
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} while (0)
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/* ------------------------------------------------------------
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**
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* @brief This function executes a reversed words copy on a specified buffer.
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*
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* on a 6 words byffer:
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*
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* buff[5] <---> buff[0]
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* buff[4] <---> buff[1]
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* buff[3] <---> buff[2]
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*
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* @param[in] dst_ptr - The counter buffer.
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* @param[in] size - The counter size in words.
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*
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*/
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void util_reverse_words_buff(u32 *buff_ptr, u32 size_words);
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/* ------------------------------------------------------------
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**
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* @brief This function executes a reversed byte copy on a specified buffer.
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*
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* on a 6 byte byffer:
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*
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* buff[5] <---> buff[0]
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* buff[4] <---> buff[1]
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* buff[3] <---> buff[2]
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*
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* @param[in] dst_ptr - The counter buffer.
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* @param[in] src_ptr - The counter size in bytes.
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*
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*/
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void util_reverse_buff(u8 *buff_ptr, u32 size);
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/* ------------------------------------------------------------
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**
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* @brief This function executes a memory copy between 2 buffers.
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*
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* @param[in] dst_ptr - The first counter buffer.
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* @param[in] src_ptr - The second counter buffer.
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* @param[in] size - The counter size in words.
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*
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*/
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void util_word_memcpy(u32 *dst_ptr, u32 *src_ptr, u32 size);
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/* ------------------------------------------------------------
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**
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* @brief This function executes a memory set operation on a buffer.
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*
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* @param[in] buff_ptr - the buffer.
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* @param[in] val - The value to set the buffer.
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* @param[in] size - the buffers size in words.
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*
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*/
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void util_word_memset(u32 *buff_ptr, u32 val, u32 size);
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/* ------------------------------------------------------------
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**
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* @brief This function executes a reverse bytes copying from one buffer
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* to another buffer.
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*
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* @param[in] dst_ptr - The pointer to destination buffer.
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* @param[in] src_ptr - The pointer to source buffer.
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* @param[in] size - The size in words.
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*
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*/
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void util_reverse_word_memcpy(u32 *dst_ptr, u32 *src_ptr, u32 size);
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/* ------------------------------------------------------------
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**
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* @brief This function executes a reverse bytes copying from one buffer
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* to another buffer.
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*
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* @param[in] dst_ptr - The pointer to destination buffer.
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* @param[in] src_ptr - The pointer to source buffer.
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* @param[in] size - The size in bytes.
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*
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*/
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void util_reverse_memcpy(u8 *dst_ptr, const u8 *src_ptr, u32 size);
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#ifdef __cplusplus
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}
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#endif
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#endif
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