labsi: build script for u-boot.scr to boot Linux

configs/labsi-rpi4/build-uboot-script.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+# Compiles the U-Boot script
+
+set -eo pipefail
+SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../" && pwd)"
+source "$SRC_DIR/lib/common.sh"
+
+DIST_DIR="$SRC_DIR/dist"
+"$UBOOT_DEST/tools/mkimage" -A arm64 -T script -C none -n "Boot script" -d "$CUSTOM_CONFIG_DIR/files/uboot-script.txt" "$DIST_DIR/labsi-rpi4/boot.scr"
+

configs/labsi-rpi4/files/uboot-script.txt

@@ -0,0 +1,7 @@
+fdt addr ${fdt_addr} && fdt get value bootargs /chosen bootargs
+# set decompression zone in RAM at 400MB, 64MB in size
+setenv kernel_comp_addr_r 0x19000000
+setenv kernel_comp_size 0x04000000
+fatload mmc 0:1 ${kernel_addr_r} vmlinuz-6.1.61-rpi+
+booti ${kernel_addr_r} - ${fdt_addr}
+