commit a94b2c12ed4e2dbd4b301d3d408a7057291c8fa3
author Abhi Singh <abhi.singh@arm.com> Wed Nov 06 11:11:11 2024 -0600
committer Abhi Singh <Abhi.Singh@arm.com> Tue Mar 18 19:52:57 2025 +0100
tree d89b41e6eabcefd5ade76ad8ac32ade4d0c2a62a
parent 548c0232839adbf4fdb205173ef8af713db73906

feat(rpi3): implement mboot for rpi3

Add Measured Boot support using the Event Log backend for the rpi3
platform.
-Implement measured boot infrastructure in BL1 & BL2, including
 the init, measure image, and finish phases.
-Pass the eventlog addr and size from BL1 to BL2 using the
 image entry point args.
-dump the eventlog after measuring BL2, and after all images are
 measured in BL2.

Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
Signed-off-by: Abhi Singh <abhi.singh@arm.com>
Change-Id: I7c040c4a2d001a933fefb0b16f0fdf2a43a11be9

plat/rpi/rpi3/rpi3_bl2_setup.c

diff --git a/plat/rpi/rpi3/rpi3_bl2_setup.c b/plat/rpi/rpi3/rpi3_bl2_setup.c
index 80e4d8d..2f57b32 100644
--- a/plat/rpi/rpi3/rpi3_bl2_setup.c
+++ b/plat/rpi/rpi3/rpi3_bl2_setup.c
@@ -1,12 +1,12 @@
 /*
- * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2025, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <assert.h>
 
-#include <platform_def.h>
+#include "./include/rpi3_measured_boot.h"
 
 #include <arch_helpers.h>
 #include <common/bl_common.h>
@@ -18,6 +18,7 @@
 #include <drivers/generic_delay_timer.h>
 #include <drivers/rpi3/gpio/rpi3_gpio.h>
 #include <drivers/rpi3/sdhost/rpi3_sdhost.h>
+#include <platform_def.h>
 
 #include <rpi_shared.h>
 
@@ -27,6 +28,10 @@
 /* Data structure which holds the MMC info */
 static struct mmc_device_info mmc_info;
 
+/* Variables that hold the eventlog addr and size for use in BL2 Measured Boot */
+static uint8_t *event_log_start;
+static size_t event_log_size;
+
 static void rpi3_sdhost_setup(void)
 {
 	struct rpi3_sdhost_params params;
@@ -41,6 +46,12 @@
 	rpi3_sdhost_init(&params, &mmc_info);
 }
 
+void rpi3_mboot_fetch_eventlog_info(uint8_t **eventlog_addr, size_t *eventlog_size)
+{
+	*eventlog_addr = event_log_start;
+	*eventlog_size = event_log_size;
+}
+
 /*******************************************************************************
  * BL1 has passed the extents of the trusted SRAM that should be visible to BL2
  * in x0. This memory layout is sitting at the base of the free trusted SRAM.
@@ -67,6 +78,10 @@
 	/* Setup SDHost driver */
 	rpi3_sdhost_setup();
 
+	/* populate eventlog addr and size for use in bl2 mboot */
+	event_log_start = (uint8_t *)(uintptr_t)arg2;
+	event_log_size = arg3;
+
 	plat_rpi3_io_setup();
 }