loader/depthcharge: add generate_chromebook_its.sh

loader/depthcharge/generate_chromebook_its.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+# https://github.com/archlinuxarm/PKGBUILDs/blob/master/core/linux-aarch64/generate_chromebook_its.sh
+
+image=$1
+arch=$2
+compression=$3
+read -a dtb_list
+
+cat <<-ITS_HEADER_END
+/dts-v1/;
+
+/ {
+    description = "Chrome OS kernel image with one or more FDT blobs";
+    images {
+        kernel {
+            description = "kernel";
+            data = /incbin/("${image}");
+            type = "kernel_noload";
+            arch = "${arch}";
+            os = "linux";
+            compression = "${compression}";
+            load = <0>;
+            entry = <0>;
+        };
+ITS_HEADER_END
+
+for i in ${!dtb_list[@]}; do
+	dtb=${dtb_list[${i}]}
+	cat <<-FDT_END
+	        fdt-$(expr ${i} + 1) {
+	            description = "$(basename ${dtb})";
+	            data = /incbin/("${dtb}");
+	            type = "flat_dt";
+	            arch = "${arch}";
+	            compression = "none";
+	            hash {
+	                algo = "sha1";
+	            };
+	        };
+	FDT_END
+done
+
+cat <<-ITS_MIDDLE_END
+    };
+    configurations {
+        default = "conf-1";
+ITS_MIDDLE_END
+
+for i in "${!dtb_list[@]}"; do
+	compat_line=""
+	dtb_uncompressed=$(echo ${dtb_list[${i}]} | sed "s/\(\.dtb\).*/\1/g")
+	for compat in $(fdtget "${dtb_uncompressed}" / compatible); do
+		compat_line+="\"${compat}\","
+	done
+	cat <<-ITS_CONF_END
+	        conf-$(expr ${i} + 1) {
+	            kernel = "kernel";
+	            fdt = "fdt-$(expr ${i} + 1)";
+	            compatible = ${compat_line%,};
+	        };
+	ITS_CONF_END
+done
+
+cat <<-ITS_FOOTER_END
+    };
+};
+ITS_FOOTER_END