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[NUC472/M487] Refine comment with BSP driver use in DES alter.

pull/4925/head
ccli8 2017-11-21 14:07:16 +08:00
parent 479cf687ff
commit 1d62b9120b
2 changed files with 22 additions and 10 deletions
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16
features/mbedtls/targets/TARGET_NUVOTON/TARGET_M480/des/des_alt.c
View File

@ -332,7 +332,9 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
/* Init crypto module */
crypto_init();
// NOTE: Don't call driver function TDES_Open in BSP because it doesn't support TDES_CTL[3KEYS] setting.
/* NOTE: Don't call driver function TDES_Open in BSP because we don't want its internal multiple context (channel) support.
* Multiple context (channel) support has done in the upper layer.
*/
CRPT->TDES_CTL = (0 << CRPT_TDES_CTL_CHANNEL_Pos) | (enc << CRPT_TDES_CTL_ENCRPT_Pos) |
tdes_opmode | (TDES_IN_OUT_WHL_SWAP << CRPT_TDES_CTL_BLKSWAP_Pos);
@ -345,8 +347,10 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
CRPT->TDES_CTL &= ~CRPT_TDES_CTL_3KEYS_Msk;
}
// Set DES/TDES keys
// NOTE: Don't call driver function TDES_SetKey in BSP because it doesn't support endian swap.
/* Set DES/TDES keys
*
* NOTE: TDES_SetKey in BSP is not used because we need to make up an extra 2-dimension array to pass keys.
*/
uint32_t val;
volatile uint32_t *tdes_key = (uint32_t *) ((uint32_t) &CRPT->TDES0_KEY1H + (0x40 * 0));
val = nu_get32_be(key[0] + 0);
@ -378,8 +382,10 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
TDES_SetDMATransfer(0, (uint32_t) dmabuf_in, (uint32_t) dmabuf_out, data_len);
// Start enc/dec.
// NOTE: Don't call driver function TDES_Start in BSP because it will override TDES_CTL[3KEYS] setting.
/* Start enc/dec.
*
* NOTE: Don't call driver function TDES_Start in BSP because of the multiple context (channel) reason as above.
*/
CRPT->TDES_CTL |= CRPT_TDES_CTL_START_Msk | (CRYPTO_DMA_ONE_SHOT << CRPT_TDES_CTL_DMALAST_Pos);
while (CRPT->TDES_STS & CRPT_TDES_STS_BUSY_Msk);

16
features/mbedtls/targets/TARGET_NUVOTON/TARGET_NUC472/des/des_alt.c
View File

@ -332,7 +332,9 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
/* Init crypto module */
crypto_init();
// NOTE: Don't call driver function TDES_Open in BSP because it doesn't support TDES_CTL[3KEYS] setting.
/* NOTE: Don't call driver function TDES_Open in BSP because we don't want its internal multiple context (channel) support.
* Multiple context (channel) support has done in the upper layer.
*/
CRPT->TDES_CTL = (0 << CRPT_TDES_CTL_CHANNEL_Pos) | (enc << CRPT_TDES_CTL_ENCRPT_Pos) |
tdes_opmode | (TDES_IN_OUT_WHL_SWAP << CRPT_TDES_CTL_BLKSWAP_Pos);
@ -345,8 +347,10 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
CRPT->TDES_CTL &= ~CRPT_TDES_CTL_3KEYS_Msk;
}
// Set DES/TDES keys
// NOTE: Don't call driver function TDES_SetKey in BSP because it doesn't support endian swap.
/* Set DES/TDES keys
*
* NOTE: TDES_SetKey in BSP is not used because we need to make up an extra 2-dimension array to pass keys.
*/
uint32_t val;
volatile uint32_t *tdes_key = (uint32_t *) ((uint32_t) &CRPT->TDES0_KEY1H + (0x40 * 0));
val = nu_get32_be(key[0] + 0);
@ -378,8 +382,10 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
TDES_SetDMATransfer(0, (uint32_t) dmabuf_in, (uint32_t) dmabuf_out, data_len);
// Start enc/dec.
// NOTE: Don't call driver function TDES_Start in BSP because it will override TDES_CTL[3KEYS] setting.
/* Start enc/dec.
*
* NOTE: Don't call driver function TDES_Start in BSP because of the multiple context (channel) reason as above.
*/
CRPT->TDES_CTL |= CRPT_TDES_CTL_START_Msk | (CRYPTO_DMA_ONE_SHOT << CRPT_TDES_CTL_DMALAST_Pos);
while (CRPT->TDES_STS & CRPT_TDES_STS_BUSY_Msk);