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