1 /* 2 * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <debug.h> 8 9 /* mbed TLS headers */ 10 #include <mbedtls/memory_buffer_alloc.h> 11 #include <mbedtls/platform.h> 12 #include <mbedtls_config.h> 13 14 /* 15 * mbed TLS heap 16 */ 17 #if (TF_MBEDTLS_KEY_ALG_ID == TF_MBEDTLS_ECDSA) 18 #define MBEDTLS_HEAP_SIZE (14*1024) 19 #elif (TF_MBEDTLS_KEY_ALG_ID == TF_MBEDTLS_RSA) 20 #define MBEDTLS_HEAP_SIZE (7*1024) 21 #endif 22 static unsigned char heap[MBEDTLS_HEAP_SIZE]; 23 24 /* 25 * mbed TLS initialization function 26 */ 27 void mbedtls_init(void) 28 { 29 static int ready; 30 31 if (!ready) { 32 /* Initialize the mbed TLS heap */ 33 mbedtls_memory_buffer_alloc_init(heap, MBEDTLS_HEAP_SIZE); 34 35 #ifdef MBEDTLS_PLATFORM_SNPRINTF_ALT 36 /* Use reduced version of snprintf to save space. */ 37 mbedtls_platform_set_snprintf(tf_snprintf); 38 #endif 39 40 ready = 1; 41 } 42 } 43