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[NUC472/M487] Refine AES/DES alter. DMA buffer requirement comment

pull/4925/head
ccli8 2017-11-07 14:00:16 +08:00
parent aafbdc8d38
commit ac000244f4
4 changed files with 40 additions and 16 deletions
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14
features/mbedtls/targets/TARGET_NUVOTON/TARGET_M480/aes/aes_alt.c
View File

@ -43,10 +43,15 @@ static void mbedtls_zeroize( void *v, size_t n )
while( n-- ) *p++ = 0;
}
/* DMA compatible backup buffer if user buffer doesn't meet requirements
/* AES DMA compatible backup buffer if user buffer doesn't meet requirements
*
* MAX_DMA_CHAIN_SIZE must be a multiple of 16-byte block size.
* Its value is estimated to trade memory footprint off against performance.
* AES DMA buffer location requires to be:
* (1) Word-aligned
* (2) Located in 0x2xxxxxxx region. Check linker files to ensure global variables are placed in this region.
*
* AES DMA buffer size MAX_DMA_CHAIN_SIZE must be a multiple of 16-byte block size.
* Its value is estimated to trade memory footprint off against performance.
*
*/
#define MAX_DMA_CHAIN_SIZE (16*6)
MBED_ALIGN(4) static uint8_t au8OutputData[MAX_DMA_CHAIN_SIZE];
@ -133,7 +138,8 @@ static void __nvt_aes_crypt( mbedtls_aes_context *ctx,
* 1) Word-aligned
* 2) Located in 0x2xxxxxxx region
*/
if ((! crypto_dma_buff_compat(au8OutputData, MAX_DMA_CHAIN_SIZE)) || (! crypto_dma_buff_compat(au8InputData, MAX_DMA_CHAIN_SIZE))) {
if ((! crypto_dma_buff_compat(au8OutputData, MAX_DMA_CHAIN_SIZE)) ||
(! crypto_dma_buff_compat(au8InputData, MAX_DMA_CHAIN_SIZE))) {
error("Buffer for AES alter. DMA requires to be word-aligned and located in 0x20000000-0x2FFFFFFF region.");
}

14
features/mbedtls/targets/TARGET_NUVOTON/TARGET_M480/des/des_alt.c
View File

@ -26,10 +26,15 @@
#include "mbed_toolchain.h"
#include "mbed_error.h"
/* DMA buffer
/* DES DMA compatible buffer requirements
*
* MAXSIZE_DMABUF must be a multiple of 64-bit block size.
* Its value is estimated to trade memory footprint off against performance.
* DES DMA buffer location requires to be:
* (1) Word-aligned
* (2) Located in 0x2xxxxxxx region. Check linker files to ensure global variables are placed in this region.
*
* DES DMA buffer size MAXSIZE_DMABUF must be a multiple of 64-bit block size.
* Its value is estimated to trade memory footprint off against performance.
*
*/
#define MAXSIZE_DMABUF (8 * 5)
MBED_ALIGN(4) static uint8_t dmabuf_in[MAXSIZE_DMABUF];
@ -314,7 +319,8 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
* 1) Word-aligned
* 2) Located in 0x2xxxxxxx region
*/
if ((! crypto_dma_buff_compat(dmabuf_in, MAXSIZE_DMABUF)) || (! crypto_dma_buff_compat(dmabuf_out, MAXSIZE_DMABUF))) {
if ((! crypto_dma_buff_compat(dmabuf_in, MAXSIZE_DMABUF)) ||
(! crypto_dma_buff_compat(dmabuf_out, MAXSIZE_DMABUF))) {
error("Buffer for DES alter. DMA requires to be word-aligned and located in 0x20000000-0x2FFFFFFF region.");
}

14
features/mbedtls/targets/TARGET_NUVOTON/TARGET_NUC472/aes/aes_alt.c
View File

@ -43,10 +43,15 @@ static void mbedtls_zeroize( void *v, size_t n )
while( n-- ) *p++ = 0;
}
/* DMA compatible backup buffer if user buffer doesn't meet requirements
/* AES DMA compatible backup buffer if user buffer doesn't meet requirements
*
* MAX_DMA_CHAIN_SIZE must be a multiple of 16-byte block size.
* Its value is estimated to trade memory footprint off against performance.
* AES DMA buffer location requires to be:
* (1) Word-aligned
* (2) Located in 0x2xxxxxxx region. Check linker files to ensure global variables are placed in this region.
*
* AES DMA buffer size MAX_DMA_CHAIN_SIZE must be a multiple of 16-byte block size.
* Its value is estimated to trade memory footprint off against performance.
*
*/
#define MAX_DMA_CHAIN_SIZE (16*6)
MBED_ALIGN(4) static uint8_t au8OutputData[MAX_DMA_CHAIN_SIZE];
@ -133,7 +138,8 @@ static void __nvt_aes_crypt( mbedtls_aes_context *ctx,
* 1) Word-aligned
* 2) Located in 0x2xxxxxxx region
*/
if ((! crypto_dma_buff_compat(au8OutputData, MAX_DMA_CHAIN_SIZE)) || (! crypto_dma_buff_compat(au8InputData, MAX_DMA_CHAIN_SIZE))) {
if ((! crypto_dma_buff_compat(au8OutputData, MAX_DMA_CHAIN_SIZE)) ||
(! crypto_dma_buff_compat(au8InputData, MAX_DMA_CHAIN_SIZE))) {
error("Buffer for AES alter. DMA requires to be word-aligned and located in 0x20000000-0x2FFFFFFF region.");
}

14
features/mbedtls/targets/TARGET_NUVOTON/TARGET_NUC472/des/des_alt.c
View File

@ -26,10 +26,15 @@
#include "mbed_toolchain.h"
#include "mbed_error.h"
/* DMA buffer
/* DES DMA compatible buffer requirements
*
* MAXSIZE_DMABUF must be a multiple of 64-bit block size.
* Its value is estimated to trade memory footprint off against performance.
* DES DMA buffer location requires to be:
* (1) Word-aligned
* (2) Located in 0x2xxxxxxx region. Check linker files to ensure global variables are placed in this region.
*
* DES DMA buffer size MAXSIZE_DMABUF must be a multiple of 64-bit block size.
* Its value is estimated to trade memory footprint off against performance.
*
*/
#define MAXSIZE_DMABUF (8 * 5)
MBED_ALIGN(4) static uint8_t dmabuf_in[MAXSIZE_DMABUF];
@ -314,7 +319,8 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
* 1) Word-aligned
* 2) Located in 0x2xxxxxxx region
*/
if ((! crypto_dma_buff_compat(dmabuf_in, MAXSIZE_DMABUF)) || (! crypto_dma_buff_compat(dmabuf_out, MAXSIZE_DMABUF))) {
if ((! crypto_dma_buff_compat(dmabuf_in, MAXSIZE_DMABUF)) ||
(! crypto_dma_buff_compat(dmabuf_out, MAXSIZE_DMABUF))) {
error("Buffer for DES alter. DMA requires to be word-aligned and located in 0x20000000-0x2FFFFFFF region.");
}