From 05fd893ea40718a0f0f81246425dfcb4b711642c Mon Sep 17 00:00:00 2001 From: Antonio Nino Diaz Date: Fri, 19 May 2017 16:57:54 +0100 Subject: [PATCH] mbedtls: Define optimized mbed TLS heap size mbed TLS provides the debug API `mbedtls_memory_buffer_alloc_status()` to analyse the RAM usage of the library. When RSA is selected as algorithm, the maximum heap usage in FVP and Juno has been determined empirically to be approximately 5.5 KiB. However, The default heap size used when RSA is selected is 8 KiB. This patch reduces the buffer from 8 KiB to 6 KiB so that the BSS sections of both BL1 and BL2 are 2 KiB smaller when the firmware is compiled with TBB support. Change-Id: I43878a4e7af50c97be9c8d027c728c8483f24fbf Signed-off-by: Antonio Nino Diaz --- drivers/auth/mbedtls/mbedtls_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/auth/mbedtls/mbedtls_common.c b/drivers/auth/mbedtls/mbedtls_common.c index 871831e2..336e44be 100644 --- a/drivers/auth/mbedtls/mbedtls_common.c +++ b/drivers/auth/mbedtls/mbedtls_common.c @@ -16,7 +16,7 @@ #if (TF_MBEDTLS_KEY_ALG_ID == TF_MBEDTLS_ECDSA) #define MBEDTLS_HEAP_SIZE (14*1024) #elif (TF_MBEDTLS_KEY_ALG_ID == TF_MBEDTLS_RSA) -#define MBEDTLS_HEAP_SIZE (8*1024) +#define MBEDTLS_HEAP_SIZE (6*1024) #endif static unsigned char heap[MBEDTLS_HEAP_SIZE]; -- 2.30.2