fix(intel): add cache invalidation during BL31 initialization
During warm boot, the data cache is invalidated before
enabling them in u-boot proper, this cache
invalidation (+ cleaning) leads to the sync-up of stale
values in the cache to be synced with the main memory.
So, before the cache cleaning is done in u-boot proper,
it is invalidated in BL31 so that the cache data gets in
sync with u-boot proper memory address space and when
u-boot proper does its initialization which in turn clears
its BSS and heap section.
Change-Id: Ic8d8672f1e371868be7f54f5a1fae9229ab15164
Signed-off-by: Tanmay Kathpalia <tanmay.kathpalia@intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
diff --git a/plat/intel/soc/agilex5/bl31_plat_setup.c b/plat/intel/soc/agilex5/bl31_plat_setup.c
index 8d3928f..96c4161 100644
--- a/plat/intel/soc/agilex5/bl31_plat_setup.c
+++ b/plat/intel/soc/agilex5/bl31_plat_setup.c
@@ -1,6 +1,7 @@
/*
* Copyright (c) 2019-2024, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2019-2023, Intel Corporation. All rights reserved.
+ * Copyright (c) 2024, Altera Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -17,6 +18,7 @@
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <plat/common/platform.h>
+#include "agilex5_cache.h"
#include "agilex5_power_manager.h"
#include "ccu/ncore_ccu.h"
#include "socfpga_mailbox.h"
@@ -193,7 +195,8 @@
boot_core = (mmio_read_32(AGX5_PWRMGR(MPU_BOOTCONFIG)) & 0xC00);
NOTICE("BL31: Boot Core = %x\n", boot_core);
NOTICE("BL31: CPU ID = %x\n", cpuid);
-
+ INFO("BL31: Invalidate Data cache\n");
+ invalidate_dcache_all();
}
/* Get non-secure image entrypoint for BL33. Zephyr and Linux */