plat/arm: Rentroduce tb_fw_config device tree
Moved BL2 configuration nodes from fw_config to newly
created tb_fw_config device tree.
fw_config device tree's main usage is to hold properties shared
across all BLx images.
An example is the "dtb-registry" node, which contains the
information about the other device tree configurations
(load-address, size).
Also, Updated load-address of tb_fw_config which is now located
after fw_config in SRAM.
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ic398c86a4d822dacd55b5e25fd41d4fe3888d79a
diff --git a/plat/arm/board/sgm775/fdts/sgm775_tb_fw_config.dts b/plat/arm/board/sgm775/fdts/sgm775_tb_fw_config.dts
new file mode 100644
index 0000000..49eda27
--- /dev/null
+++ b/plat/arm/board/sgm775/fdts/sgm775_tb_fw_config.dts
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/dts-v1/;
+
+/ {
+ tb_fw-config {
+ compatible = "arm,tb_fw";
+
+ /* Disable authentication for development */
+ disable_auth = <0x0>;
+
+ /*
+ * The following two entries are placeholders for Mbed TLS
+ * heap information. The default values don't matter since
+ * they will be overwritten by BL1.
+ * In case of having shared Mbed TLS heap between BL1 and BL2,
+ * BL1 will populate these two properties with the respective
+ * info about the shared heap. This info will be available for
+ * BL2 in order to locate and re-use the heap.
+ */
+ mbedtls_heap_addr = <0x0 0x0>;
+ mbedtls_heap_size = <0x0>;
+ };
+};