AES_IV_0_OFFSET
iowrite32(iv32[0], aes_dev->base_reg + AES_IV_0_OFFSET);
iv32[0] = ioread32(aes_dev->base_reg + AES_IV_0_OFFSET);
iowrite32(0x00000001, aes_dev->base_reg + AES_IV_0_OFFSET);