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/*
* Copyright (c) 2015-2023, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stddef.h>
/* mbed TLS headers */
#include <mbedtls/memory_buffer_alloc.h>
#include <mbedtls/platform.h>
#include <mbedtls/version.h>
#include <common/debug.h>
#include <drivers/auth/mbedtls/mbedtls_common.h>
#include <plat/common/platform.h>
static void cleanup(void)
{
ERROR("EXIT from BL2\n");
panic();
}
/*
* mbed TLS initialization function
*/
void mbedtls_init(void)
{
static int ready;
void *heap_addr;
size_t heap_size = 0;
int err;
if (!ready) {
if (atexit(cleanup))
panic();
err = plat_get_mbedtls_heap(&heap_addr, &heap_size);
/* Ensure heap setup is proper */
if (err < 0) {
ERROR("Mbed TLS failed to get a heap\n");
panic();
}
assert(heap_size >= TF_MBEDTLS_HEAP_SIZE);
/* Initialize the mbed TLS heap */
mbedtls_memory_buffer_alloc_init(heap_addr, heap_size);
#ifdef MBEDTLS_PLATFORM_SNPRINTF_ALT
mbedtls_platform_set_snprintf(snprintf);
#endif
ready = 1;
}
}
/*
* The following helper function simply returns the default allocated heap.
* It can be used by platforms for their plat_get_mbedtls_heap() implementation.
*/
int get_mbedtls_heap_helper(void **heap_addr, size_t *heap_size)
{
static unsigned char heap[TF_MBEDTLS_HEAP_SIZE];
assert(heap_addr != NULL);
assert(heap_size != NULL);
*heap_addr = heap;
*heap_size = sizeof(heap);
return 0;
}
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