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器件型号：AM62A7 工具与软件：
您好、ti
我使用 tisci API 接口编写了一个加密的演示、
但用于确定应如何调整某些参数的信息太少。
您能否提供演示？
int ti_sci_read_otp_mmr(uint8_t mmr_idx, uint32_t *val)
{
struct ti_sci_msg_req_read_otp_mmr req = { };
struct ti_sci_msg_resp_read_otp_mmr resp = { };
struct ti_sci_xfer xfer = { };
int ret = 0;
//----------------------encryption test ------------
#if 1
struct csp_aes_ctx_v0 {
uint8_t mode;
uint8_t key_size;
uint8_t ctr_width;
uint8_t resv0;
uint64_t data_len;
uint64_t dest_addr; //store data?????
uint32_t key[8];
uint32_t iv[4];
uint32_t tag[4];
}__packed;
struct csp_aes_opn_req_data {
uint32_t ctx_address_lo;
uint32_t ctx_address_hi;
}__packed;
struct csp_aes_opn_resp_data {
uint8_t tag[16]; //????
}__packed;
#define AES_ECB (0x1) //????
#define AES_CBC (0x2) //????
#define AES_GCM (0x3) //????
#define TISCI_MSG_SA2UL_AES_ENCRYPT 0x9040
#define TISCI_MSG_SA2UL_AES_DECRYPT 0x9041
struct csp_aes_opn_req_data req2 = {};
struct csp_aes_opn_resp_data resp2 = {};
struct ti_sci_xfer xfer2 = { };
char data[16] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
struct csp_aes_ctx_v0 ctx1 = {
.mode = AES_CBC,
.key_size = 128,
.data_len = sizeof(data),
.dest_addr = (uint64_t)data,
.key[0] = 0x12,
.key[1] = 0x34,
.key[2] = 0x56,
.key[3] = 0x78,
};
ret = ti_sci_setup_xfer(TISCI_MSG_SA2UL_AES_ENCRYPT, 0,
&req2, sizeof(req2), &resp2, sizeof(resp2), &xfer2);
if (ret)
goto exit;
req2.ctx_address_lo = ( (uint64_t)(&ctx1) ) & 0xffffffff;
req2.ctx_address_hi = ( ( (uint64_t)(&ctx1 ) ) >>32 ) & 0xffffffff;
ret = ti_sci_do_xfer(&xfer2);
if (ret)
goto exit;
EMSG("encrpto:%02x %02x %02x %02x\n", resp2.tag[0],resp2.tag[1],resp2.tag[2],resp2.tag[3] );
#endif
ret = ti_sci_setup_xfer(TI_SCI_MSG_READ_OTP_MMR, 0,
&req, sizeof(req), &resp, sizeof(resp), &xfer);
if (ret)
goto exit;
req.mmr_idx = mmr_idx;
ret = ti_sci_do_xfer(&xfer);
if (ret)
goto exit;
*val = resp.mmr_val;
exit:
memzero_explicit(&resp, sizeof(resp));
return ret;
}