54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/**
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*****************************************************************************
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* @file cmem7_aes.c
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*
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* @brief CMEM7 AES source file
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*
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*
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* @version V1.0
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* @date 3. September 2013
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*
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* @note
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*
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*****************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, CAPITAL-MICRO SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* <h2><center>© COPYRIGHT 2013 Capital-micro </center></h2>
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*****************************************************************************
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*/
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#include "cmem7_aes.h"
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BOOL AES_Decrypt(const void *src, void *dst, uint32_t len)
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{
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uint32_t *po = dst;
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const uint32_t *pi = src;
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if (len & 0xF)
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return FALSE;
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AES->FIFO_CLEAR = 1;
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AES->FIFO_CLEAR = 0;
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GLOBAL_CTRL->AES_BURST_TYPE = 0x1; // Cannot be 0
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while (len > 0) {
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while (0 == GLOBAL_CTRL->AES_STATUS_b.IDLE); // 0x41007010
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udelay(2);
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GLOBAL_CTRL->AES_TARGET_ADDR = (uint32_t)po; // 0x41800000;
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po += 4;
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len -= 4 * sizeof(uint32_t);
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while (0 == GLOBAL_CTRL->AES_STATUS_b.RD_EMPTY); // 0x41007010
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AES->FIFO = *pi++;
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AES->FIFO = *pi++;
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AES->FIFO = *pi++;
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AES->FIFO = *pi++;
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}
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return TRUE;
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}
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