versal2: add initial platform support

Add OP-TEE build support for AMD Versal Gen 2 platform.
Linux Kernel, optee_os, TF-A, U-Boot are being built outside of
build root and sourced from AMD github repo.
Rootfs is from buildroot.

Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

kconfigs/u-boot_versal2.conf

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+CONFIG_TEE=y
+CONFIG_OPTEE=y

kconfigs/versal2.conf

@@ -0,0 +1,2 @@
+CONFIG_TEE=y
+CONFIG_OPTEE=y

versal2.mk

@@ -0,0 +1,172 @@
+################################################################################
+# Following variables defines how the NS_USER (Non Secure User - Client
+# Application), NS_KERNEL (Non Secure Kernel), S_KERNEL (Secure Kernel) and
+# S_USER (Secure User - TA) are compiled
+################################################################################
+override COMPILE_NS_USER	:= 64
+override COMPILE_NS_KERNEL	:= 64
+override COMPILE_S_USER		:= 64
+override COMPILE_S_KERNEL	:= 64
+
+# Network support related packages:
+BR2_PACKAGE_DHCPCD	?= y
+BR2_PACKAGE_ETHTOOL	?= y
+BR2_PACKAGE_XINETD	?= y
+
+# SSH Packages :
+BR2_PACKAGE_OPENSSH		?= y
+BR2_PACKAGE_OPENSSH_SERVER	?= y
+BR2_PACKAGE_OPENSSH_KEY_UTILS	?= y
+
+# Openssl binary
+BR2_PACKAGE_LIBOPENSSL_BIN	?= y
+BR2_PACKAGE_LIBP11	?= y
+
+PLATFORM = AMD Versal Gen 2
+OPTEE_OS_PLATFORM = versal2
+OPTEE_OS_COMMON_EXTRA_FLAGS ?= CFG_PKCS11_TA=y CFG_USER_TA_TARGET_pkcs11=ta_arm64 O=out/arm
+
+################################################################################
+# Paths to git projects and various binaries
+################################################################################
+TF_A_PATH	?= $(ROOT)/arm-trusted-firmware
+U-BOOT_PATH	?= $(ROOT)/u-boot-xlnx
+LINUX_PATH	?= $(ROOT)/linux-xlnx
+
+include common.mk
+
+BINARIES_PATH	?= $(ROOT)/out/bin
+TF_A_ELF	?= $(TF_A_PATH)/build/$(OPTEE_OS_PLATFORM)/release/bl31/bl31.elf
+OPTEE_OS_ELF	?= $(OPTEE_OS_PATH)/out/arm/core/tee.elf
+U-BOOT_ELF	?= $(U-BOOT_PATH)/u-boot.elf
+U-BOOT_DTB	?= $(U-BOOT_PATH)/arch/arm/dts/versal2-*.dtb
+MKIMAGE_PATH	?= $(U-BOOT_PATH)/tools
+LINUX_IMAGE	?= $(LINUX_PATH)/arch/arm64/boot/Image
+ROOTFS_GZ	?= $(ROOT)/out-br/images/rootfs.cpio.gz
+ROOTFS_SIGN	?= $(BINARIES_PATH)/rootfs.cpio.gz.u-boot
+
+################################################################################
+# Targets
+################################################################################
+
+all: tfa optee-os dtbo u-boot linux buildroot buildroot_mkimg
+clean: tfa-clean optee-os-clean dtbo-clean u-boot-clean linux-clean buildroot-clean
+
+$(BINARIES_PATH):
+	mkdir -p $@
+
+include toolchain.mk
+
+################################################################################
+# ARM Trusted Firmware
+################################################################################
+
+TF_A_EXPORTS = CROSS_COMPILE="$(CCACHE)$(AARCH64_CROSS_COMPILE)"
+TF_A_FLAGS = PLAT=versal2 CONSOLE=pl011 RESET_TO_BL31=1 SPD=opteed DEBUG=0 \
+	     MEM_BASE=0x1600000 MEM_SIZE=0x200000 \
+	     XILINX_OF_BOARD_DTB_ADDR=0x1000 \
+	     BL32_MEM_BASE=0x1800000 BL32_MEM_SIZE=0x8000000
+
+tfa:
+	$(TF_A_EXPORTS) $(MAKE) -C $(TF_A_PATH) $(TF_A_FLAGS) bl31
+	mkdir -p $(BINARIES_PATH)
+	cp $(TF_A_ELF) $(BINARIES_PATH)
+
+tfa-clean:
+	$(TF_A_EXPORTS) $(MAKE) -C $(TF_A_PATH) $(TF_A_FLAGS) clean
+
+################################################################################
+# OP-TEE
+################################################################################
+
+OPTEE_OS_COMMON_FLAGS += CFG_TEE_CORE_LOG_LEVEL=2 CFG_TEE_TA_LOG_LEVEL=2
+
+optee-os: optee-os-common
+	mkdir -p $(BINARIES_PATH)
+	cp $(OPTEE_OS_ELF) $(BINARIES_PATH)
+
+optee-os-clean: optee-os-clean-common
+	rm -rf ${OPTEE_OS_PATH}/out/
+
+################################################################################
+# U-Boot
+################################################################################
+
+U-BOOT_EXPORTS = CROSS_COMPILE="$(CCACHE)$(AARCH64_CROSS_COMPILE)"
+U-BOOT_DEFCONFIG_COMMON_FILES := $(U-BOOT_PATH)/configs/amd_versal2_virt_defconfig \
+			$(BUILD_PATH)/kconfigs/u-boot_versal2.conf
+
+u-boot-defconfig: $(U-BOOT_DEFCONFIG_COMMON_FILES)
+	cd $(U-BOOT_PATH) && \
+                ARCH=arm64 \
+                scripts/kconfig/merge_config.sh $(U-BOOT_DEFCONFIG_COMMON_FILES)
+
+u-boot: u-boot-defconfig
+	$(U-BOOT_EXPORTS) $(MAKE) -C $(U-BOOT_PATH)
+	mkdir -p $(BINARIES_PATH)
+	cp $(U-BOOT_ELF) $(BINARIES_PATH)
+
+u-boot-defconfig-clean:
+	rm -f $(U-BOOT_PATH)/.config
+
+u-boot-clean: u-boot-defconfig-clean
+	$(U-BOOT_EXPORTS) $(MAKE) -C $(U-BOOT_PATH) clean
+
+###############################################################################
+# Device-Tree
+###############################################################################
+dtbo: u-boot
+	mkdir -p $(BINARIES_PATH)
+	${LINUX_PATH}/scripts/dtc/dtc -@ -I dts \
+		-O dtb -o $(BINARIES_PATH)/versal2-memory-reservation.dtbo \
+		$(BUILD_PATH)/versal2/versal2-memory-reservation.dtso
+	@$(foreach dtb,$(wildcard $(U-BOOT_DTB)), \
+		${LINUX_PATH}/scripts/dtc/fdtoverlay -i $(dtb) \
+		-o $(dtb) $(BINARIES_PATH)/versal2-memory-reservation.dtbo ; \
+		echo "Applied overlay to $(dtb)";)
+	cp $(U-BOOT_DTB) $(BINARIES_PATH)
+
+dtbo-clean:
+	rm -f $(BINARIES_PATH)/versal2-memory-reservation.dtbo
+
+################################################################################
+# Linux kernel
+################################################################################
+
+LINUX_DEFCONFIG_COMMON_ARCH := arm64
+LINUX_DEFCONFIG_COMMON_FILES := \
+		$(LINUX_PATH)/arch/arm64/configs/xilinx_defconfig \
+		$(BUILD_PATH)/kconfigs/versal2.conf
+
+linux-defconfig: $(LINUX_PATH)/.config
+
+LINUX_COMMON_FLAGS += ARCH=arm64
+
+linux: linux-common
+	mkdir -p $(BINARIES_PATH)
+	cp $(LINUX_IMAGE) $(BINARIES_PATH)
+
+linux-defconfig-clean: linux-defconfig-clean-common
+
+LINUX_CLEAN_COMMON_FLAGS += ARCH=arm64
+
+linux-clean: linux-clean-common
+
+LINUX_CLEANER_COMMON_FLAGS += ARCH=arm64
+
+linux-cleaner: linux-cleaner-common
+
+################################################################################
+# Buildroot
+################################################################################
+
+BR2_TARGET_GENERIC_ISSUE	?= "OP-TEE embedded distrib for $(PLATFORM)"
+BR2_TARGET_ROOTFS_EXT2	?= y
+BR2_PACKAGE_BUSYBOX_WATCHDOG	?= y
+
+buildroot_mkimg: buildroot
+	mkdir -p $(BINARIES_PATH)
+	$(MKIMAGE_PATH)/mkimage -A arm \
+				-T ramdisk \
+				-C gzip \
+				-d $(ROOTFS_GZ) $(ROOTFS_SIGN)

versal2/versal2-memory-reservation.dtso

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+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (C) 2024, Advanced Micro Devices, Inc.
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+&{/} {
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		tfa: tf-a@1600000 {
+			no-map;
+			reg = <0 0x1600000 0 0x200000>;
+		};
+
+		optee_addr: memory@1800000 {
+			no-map;
+			reg = <0 0x1800000 0 0x8000000>;
+		};
+
+		transfer_list: memory@1000000 {
+			no-map;
+			reg = <0 0x1000000 0 0x600000>;
+		};
+	};
+};