detect architecture and give error if running on reMarkable paper pro

scripts/bootstrap/bootstrap

@@ -20,6 +20,27 @@ if [ -z "$BASH" ] || [[ "$(ps | awk '$1=='$$' { n=split($5,a,"/"); print a[n] }'
     exit 1
 fi
 
+arch=""
+device=""
+unam="$(uname -m)"
+
+if [ "$unam" = "armv7l" ]; then
+    arch="armv7sf-k3.2"
+    device="rmall" #rmall is only rm1 and rm2 to keep compatibility with older toltec versions
+fi
+
+if [ "$unam" = "aarch64" ]; then
+    arch="aarch64-k3.10"
+    device="rmpp"
+    echo "The reMarkable Paper Pro is not yet supported!"
+    exit 1
+fi
+
+if [ -z "$arch" ]; then
+	echo "Device architecture not recognised."
+	exit 1
+fi
+
 set -eEuo pipefail
 
 # Path to the temporary local wget and Opkg binaries
@@ -33,8 +54,8 @@ toltecctl_path="${toltecctl_path:-/home/root/.local/bin/toltecctl}"
 toltec_branch="${toltec_branch:-stable}"
 
 # Base URLs for bootstrapping from the Entware and Toltec repositories
-entware_remote="${entware_remote:-https://bin.entware.net/armv7sf-k3.2/installer}"
-toltec_remote="${toltec_remote:-https://toltec-dev.org/$toltec_branch/rmall}"
+entware_remote="${entware_remote:-https://bin.entware.net/$arch/installer}"
+toltec_remote="${toltec_remote:-https://toltec-dev.org/$toltec_branch/$device}"
 
 # Remove all temporary files
 cleanup() {