refactor(tc): move DTB to start of DRAM
Now that tf-a passes the DTB address to BL33, its location doesn't
matter. Since we declare a fixed size for it (32K) put it at the start
of ram to not fragment memory. This has the added benefit of
"supporting" larger kernel sizes which are breaking with the current
location.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Ib0e4e5cf780bd58a49a34d72085b0a0914c340ed
diff --git a/plat/arm/board/tc/fdts/tc_fw_config.dts b/plat/arm/board/tc/fdts/tc_fw_config.dts
index a84c7f8..982da5b 100644
--- a/plat/arm/board/tc/fdts/tc_fw_config.dts
+++ b/plat/arm/board/tc/fdts/tc_fw_config.dts
@@ -1,10 +1,11 @@
/*
- * Copyright (c) 2020-2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2024, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common/tbbr/tbbr_img_def.h>
+#include <platform_def.h>
/dts-v1/;
@@ -25,8 +26,8 @@
};
hw-config {
- load-address = <0x0 0x83000000>;
- max-size = <0x8000>;
+ load-address = <0x0 PLAT_HW_CONFIG_DTB_BASE>;
+ max-size = <PLAT_HW_CONFIG_DTB_SIZE>;
id = <HW_CONFIG_ID>;
};
};
diff --git a/plat/arm/board/tc/include/platform_def.h b/plat/arm/board/tc/include/platform_def.h
index 130111e..a42e39d 100644
--- a/plat/arm/board/tc/include/platform_def.h
+++ b/plat/arm/board/tc/include/platform_def.h
@@ -28,6 +28,11 @@
* - Region to load secure partitions
*
*
+ * 0x8000_0000 ------------------ TC_NS_DRAM1_BASE
+ * | DTB |
+ * | (32K) |
+ * 0x8000_8000 ------------------
+ * | ... |
* 0xf8a0_0000 ------------------ TC_NS_FWU_BASE
* | FWU shmem |
* | (4MB) |
@@ -79,7 +84,7 @@
TC_TZC_DRAM1_SIZE, \
MT_MEMORY | MT_RW | MT_SECURE)
-#define PLAT_HW_CONFIG_DTB_BASE ULL(0x83000000)
+#define PLAT_HW_CONFIG_DTB_BASE TC_NS_DRAM1_BASE
#define PLAT_HW_CONFIG_DTB_SIZE ULL(0x8000)
#define PLAT_DTB_DRAM_NS MAP_REGION_FLAT( \