common: Use plain SquashFS images on disk

Store FIT headers separately on aux, and place the raw SquashFS images
on primary/secondary. This removes the need to muck about with the
device mapper to setup the rootfs, and it allows us to boot using
syslinux files.

board/aarch64/rootfs/boot/syslinux/syslinux.conf

@@ -0,0 +1,3 @@
+label Infix (aarch64)
+	kernel /boot/Image
+	append ${bootargs_root} ${bootargs_rauc} ${bootargs_log}

board/common/genimage.cfg

@@ -42,12 +42,13 @@ image mmc.img {
 	}
 
 	partition primary {
-		image = "rootfs.itb"
+		image = "rootfs.squashfs"
 		size = 224M
 	}
 
 	partition secondary {
-		image = "rootfs.itb"
+		bootable = true
+		image = "rootfs.squashfs"
 		size = 224M
 	}
 

board/common/mkmmc.sh

@@ -9,6 +9,8 @@ tmp=$BUILD_DIR/genimage.tmp
 
 mkdir -p $root/aux
 cp -f $BINARIES_DIR/uboot-env.bin $root/aux/uboot.env
+cp -f $BINARIES_DIR/rootfs.itbh $root/aux/primary.itbh
+cp -f $BINARIES_DIR/rootfs.itbh $root/aux/secondary.itbh
 
 rm -rf $tmp
 

board/common/rootfs.its

@@ -6,15 +6,6 @@
 	#address-cells = <0x1>;
 
 	images {
-		boot-script {
-			type = "script";
-			data = /incbin/("boot.script");
-			signature-1 {
-				algo = "sha256,rsa4096";
-				key-name-hint = "infix";
-			};
-		};
-
 		rootfs {
 			description = "Infix";
 			type = "ramdisk";
@@ -32,7 +23,6 @@
 		default = "verity";
 		verity {
 			ramdisk = "rootfs";
-			script = "boot-script";
 		};
 	};
 };

board/common/sign.sh

@@ -5,7 +5,9 @@ set -e
 common=$(dirname $(readlink -f "$0"))
 
 cd $BINARIES_DIR
-cp $BR2_EXTERNAL_INFIX_PATH/board/$1/boot.script .
 cp $common/rootfs.its .
 
 mkimage -E -p 0x1000 -B 0x1000 -k $2 -f rootfs.its rootfs.itb
+
+cp rootfs.itb rootfs.itbh
+truncate -s $((0x1000)) rootfs.itbh