TF-A: Add support for Measured Boot driver in BL1 and BL2

This patch adds support for Measured Boot driver functionality
in BL1 and BL2 code.

Change-Id: I7239a94c3e32b0a3e9e73768a0140e0b52ab0361
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>

bl2/bl2_main.c

 /*
- * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -14,6 +14,9 @@
 #include <common/debug.h>
 #include <drivers/auth/auth_mod.h>
 #include <drivers/console.h>
+#if MEASURED_BOOT
+#include <drivers/measured_boot/measured_boot.h>
+#endif
 #include <lib/extensions/pauth.h>
 #include <plat/common/platform.h>
 
@@ -88,14 +91,25 @@ void bl2_main(void)
 #if TRUSTED_BOARD_BOOT
 	/* Initialize authentication module */
 	auth_mod_init();
+
+#if MEASURED_BOOT
+	/* Initialize measured boot module */
+	measured_boot_init();
+
+#endif /* MEASURED_BOOT */
 #endif /* TRUSTED_BOARD_BOOT */
 
-	/* initialize boot source */
+	/* Initialize boot source */
 	bl2_plat_preload_setup();
 
 	/* Load the subsequent bootloader images. */
 	next_bl_ep_info = bl2_load_images();
 
+#if MEASURED_BOOT
+	/* Finalize measured boot */
+	measured_boot_finish();
+#endif /* MEASURED_BOOT */
+
 #if !BL2_AT_EL3
 #ifndef __aarch64__
 	/*

plat/common/plat_bl1_common.c

 /*
- * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -27,7 +27,9 @@
 #pragma weak bl1_plat_fwu_done
 #pragma weak bl1_plat_handle_pre_image_load
 #pragma weak bl1_plat_handle_post_image_load
-
+#if MEASURED_BOOT
+#pragma weak bl1_plat_set_bl2_hash
+#endif
 
 unsigned int bl1_plat_get_next_image_id(void)
 {
@@ -116,3 +118,12 @@ int bl1_plat_handle_post_image_load(unsigned int image_id)
 		(void *) bl2_tzram_layout);
 	return 0;
 }
+
+#if MEASURED_BOOT
+/*
+ * Calculates and writes BL2 hash data to TB_FW_CONFIG DTB.
+ */
+void bl1_plat_set_bl2_hash(const image_desc_t *image_desc)
+{
+}
+#endif