diff --git a/scripts/runqemu-internal b/scripts/runqemu-internal
index 7ae077766c..ac1c703c53 100755
--- a/scripts/runqemu-internal
+++ b/scripts/runqemu-internal
@@ -38,49 +38,6 @@ mem_set=`expr "$SCRIPT_QEMU_EXTRA_OPT" : '.*\(-m[[:space:]] *[0-9]*\)'`
 if [ ! -z "$mem_set" ] ; then
 #Get memory setting size from user input
   mem_size=`echo $mem_set | sed 's/-m[[:space:]] *//'`
-else
-    case "$MACHINE" in
-        "qemux86")
-            mem_size=256
-            ;;
-        "qemux86-64")
-            mem_size=256
-            ;;
-        "qemuarm")
-            mem_size=128
-            ;;
-        "qemuarm64")
-            mem_size=512
-            ;;
-        "qemumicroblaze")
-            mem_size=256
-            ;;
-        "qemumips"|"qemumips64")
-            mem_size=256
-            ;;
-        "qemuppc")
-            mem_size=256
-            ;;
-        "qemush4")
-            mem_size=1024
-            ;;
-        "qemuzynq")
-            mem_size=1024
-            ;;
-        *)
-            mem_size=64
-            ;;
-    esac
-
-fi
-
-# QEMU_MEMORY has 'M' appended to mem_size
-QEMU_MEMORY="$mem_size"M
-
-# We need to specify -m <mem_size> to overcome a bug in qemu 0.14.0
-# https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/584480
-if [ -z "$mem_set" ] ; then
-  SCRIPT_QEMU_EXTRA_OPT="$SCRIPT_QEMU_EXTRA_OPT -m $mem_size"
 fi
 
 # This file is created when runqemu-gen-tapdevs creates a bank of tap
@@ -267,26 +224,6 @@ else
         fi
 fi
 
-case "$MACHINE" in
-    "qemuarm") ;;
-    "qemuarm64") ;;
-    "qemumicroblaze") ;;
-    "qemumips") ;;
-    "qemumipsel") ;;
-    "qemumips64") ;;
-    "qemush4") ;;
-    "qemuppc") ;;
-    "qemuarmv6") ;;
-    "qemuarmv7") ;;
-    "qemux86") ;;
-    "qemux86-64") ;;
-    "qemuzynq") ;;
-    *)
-        echo "Error: Unsupported machine type $MACHINE"
-        return 1
-    ;;
-esac
-
 if [ ! -f "$KERNEL" -a "$IS_VM" = "false" ]; then
     echo "Error: Kernel image file $KERNEL doesn't exist"
     cleanup
@@ -329,12 +266,25 @@ if [ "$FSTYPE" = "nfs" ]; then
     NFSRUNNING="true"
 fi
 
-if [ "$MACHINE" = "qemuarm" -o "$MACHINE" = "qemuarmv6" -o "$MACHINE" = "qemuarmv7" ]; then
+
+set_mem_size() {
+    if [ ! -z "$mem_set" ] ; then
+        #Get memory setting size from user input
+        mem_size=`echo $mem_set | sed 's/-m[[:space:]] *//'`
+    else
+        mem_size=$1
+    fi
+    # QEMU_MEMORY has 'M' appended to mem_size
+    QEMU_MEMORY="$mem_size"M
+
+}
+
+config_qemuarm() {
+    set_mem_size 128
     QEMU=qemu-system-arm
     MACHINE_SUBTYPE=versatilepb
     export QEMU_AUDIO_DRV="none"
     QEMU_UI_OPTIONS="$QEMU_UI_OPTIONS"
-    # QEMU_UI_OPTIONS="$QEMU_UI_OPTIONS -force-pointer"
     if [ "${FSTYPE:0:3}" = "ext" -o "$FSTYPE" = "btrfs" -o "$FSTYPE" = "wic" ]; then
         KERNCMDLINE="root=$DROOT rw console=ttyAMA0,115200 console=tty $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY highres=off"
         QEMUOPTIONS="$QEMU_NETWORK_CMD -M ${MACHINE_SUBTYPE} $ROOTFS_OPTIONS -no-reboot $QEMU_UI_OPTIONS"
@@ -354,9 +304,10 @@ if [ "$MACHINE" = "qemuarm" -o "$MACHINE" = "qemuarmv6" -o "$MACHINE" = "qemuarm
     if [ "$MACHINE" = "qemuarmv7" ]; then
         QEMUOPTIONS="$QEMUOPTIONS -cpu cortex-a8"
     fi
-fi
+}
 
-if [ "$MACHINE" = "qemuarm64" ]; then
+config_qemuarm64() {
+    set_mem_size 512
     QEMU=qemu-system-aarch64
 
     QEMU_NETWORK_CMD="-netdev tap,id=net0,ifname=$TAP,script=no,downscript=no -device virtio-net-device,netdev=net0 "
@@ -383,9 +334,10 @@ if [ "$MACHINE" = "qemuarm64" ]; then
         KERNCMDLINE="root=/dev/nfs nfsroot=$NFS_SERVER:$NFS_DIR,$UNFS_OPTS rw console=ttyAMA0,38400 mem=$QEMU_MEMORY highres=off $KERNEL_NETWORK_CMD"
         QEMUOPTIONS="$QEMU_NETWORK_CMD -machine virt -cpu cortex-a57 $QEMU_UI_OPTIONS"
     fi
-fi
+}
 
-if [ "$MACHINE" = "qemux86" ]; then
+config_qemux86() {
+    set_mem_size 256
     QEMU=qemu-system-i386
     if [ "$KVM_ACTIVE" = "yes" ]; then
         CPU_SUBTYPE=kvm32
@@ -421,9 +373,10 @@ if [ "$MACHINE" = "qemux86" ]; then
     # Currently oprofile's event based interrupt mode doesn't work(Bug #828) in
     # qemux86 and qemux86-64. We can use timer interrupt mode for now.
     KERNCMDLINE="$KERNCMDLINE oprofile.timer=1"
-fi
+}
 
-if [ "$MACHINE" = "qemux86-64" ]; then
+config_qemux86_64() {
+    set_mem_size 256
     QEMU=qemu-system-x86_64
     if [ "$KVM_ACTIVE" = "yes" ]; then
         CPU_SUBTYPE=kvm64
@@ -457,9 +410,10 @@ if [ "$MACHINE" = "qemux86-64" ]; then
     # Currently oprofile's event based interrupt mode doesn't work(Bug #828) in
     # qemux86 and qemux86-64. We can use timer interrupt mode for now.
     KERNCMDLINE="$KERNCMDLINE oprofile.timer=1"
-fi
+}
 
-if [ "$MACHINE" = "qemumips" -o "$MACHINE" = "qemumipsel" -o "$MACHINE" = "qemumips64" ]; then
+config_qemumips() {
+    set_mem_size 256
     case "$MACHINE" in
        qemumips)   QEMU=qemu-system-mips ;;
        qemumipsel) QEMU=qemu-system-mipsel ;;
@@ -481,9 +435,10 @@ if [ "$MACHINE" = "qemumips" -o "$MACHINE" = "qemumipsel" -o "$MACHINE" = "qemum
         KERNCMDLINE="root=/dev/nfs console=ttyS0 console=tty nfsroot=$NFS_SERVER:$NFS_DIR,$UNFS_OPTS rw $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY"
         QEMUOPTIONS="$QEMU_NETWORK_CMD -M $MACHINE_SUBTYPE -no-reboot $QEMU_UI_OPTIONS"
     fi
-fi
+}
 
-if [ "$MACHINE" = "qemuppc" ]; then
+config_qemuppc() {
+    set_mem_size 256
     QEMU=qemu-system-ppc
     MACHINE_SUBTYPE=mac99
     CPU_SUBTYPE=G4
@@ -506,9 +461,10 @@ if [ "$MACHINE" = "qemuppc" ]; then
         KERNCMDLINE="root=/dev/nfs console=ttyS0 console=tty nfsroot=$NFS_SERVER:$NFS_DIR,$UNFS_OPTS rw $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY"
         QEMUOPTIONS="$QEMU_NETWORK_CMD -cpu $CPU_SUBTYPE -M $MACHINE_SUBTYPE -no-reboot $QEMU_UI_OPTIONS"
     fi
-fi
+}
 
-if [ "$MACHINE" = "qemush4" ]; then
+config_qemush4() {
+    set_mem_size 1024
     QEMU=qemu-system-sh4
     MACHINE_SUBTYPE=r2d
     QEMU_UI_OPTIONS="$QEMU_UI_OPTIONS"
@@ -528,22 +484,10 @@ if [ "$MACHINE" = "qemush4" ]; then
         QEMUOPTIONS="$QEMU_NETWORK_CMD -M $MACHINE_SUBTYPE -no-reboot $QEMU_UI_OPTIONS -monitor null -serial vc -serial stdio"
         SERIALSTDIO="1"
     fi
-fi
+}
 
-if [ "${FSTYPE:0:3}" = "ext" ]; then
-    KERNCMDLINE="$KERNCMDLINE rootfstype=$FSTYPE"
-fi
-
-if [ "$MACHINE" = "qemumicroblaze" ]; then
-    QEMU=qemu-system-microblazeel
-    QEMU_SYSTEM_OPTIONS="$QEMU_NETWORK_CMD -M petalogix-ml605 -serial mon:stdio"
-    if [ "${FSTYPE:0:3}" = "ext" -o "${FSTYPE:0:4}" = "cpio" ]; then
-        KERNCMDLINE="earlyprintk root=/dev/ram rw $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY"
-        QEMUOPTIONS="$QEMU_SYSTEM_OPTIONS -initrd $ROOTFS"
-    fi
-fi
-
-if [ "$MACHINE" = "qemuzynq" ]; then
+config_qemuzynq() {
+    set_mem_size 1024
     QEMU=qemu-system-arm
     QEMU_SYSTEM_OPTIONS="$QEMU_NETWORK_CMD -M xilinx-zynq-a9 -serial null -serial mon:stdio -dtb $KERNEL-$MACHINE.dtb"
     # zynq serial ports are named 'ttyPS0' and 'ttyPS1', fixup the default values
@@ -552,6 +496,60 @@ if [ "$MACHINE" = "qemuzynq" ]; then
         KERNCMDLINE="earlyprintk root=/dev/ram rw $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY"
         QEMUOPTIONS="$QEMU_SYSTEM_OPTIONS -initrd $ROOTFS"
     fi
+}
+
+config_qemumicroblaze() {
+    set_mem_size 256
+    QEMU=qemu-system-microblazeel
+    QEMU_SYSTEM_OPTIONS="$QEMU_NETWORK_CMD -M petalogix-ml605 -serial mon:stdio"
+    if [ "${FSTYPE:0:3}" = "ext" -o "${FSTYPE:0:4}" = "cpio" ]; then
+        KERNCMDLINE="earlyprintk root=/dev/ram rw $KERNEL_NETWORK_CMD mem=$QEMU_MEMORY"
+        QEMUOPTIONS="$QEMU_SYSTEM_OPTIONS -initrd $ROOTFS"
+    fi
+}
+
+case "$MACHINE" in
+    "qemuarm" | "qemuarmv6" | "qemuarmv7")
+        config_qemuarm
+        ;;
+    "qemuarm64")
+        config_qemuarm64
+        ;;
+    "qemux86")
+        config_qemux86
+        ;;
+    "qemux86-64")
+        config_qemux86_64
+        ;;
+    "qemumips" | "qemumipsel" | "qemumips64")
+        config_qemumips
+        ;;
+    "qemuppc")
+        config_qemuppc
+        ;;
+    "qemush4")
+        config_qemush4
+        ;;
+    "qemuzynq")
+        config_qemuzynq
+        ;;
+    "qemumicroblaze")
+        config_qemumicroblaze
+        ;;
+    *)
+        echo "Error: Unsupported machine type $MACHINE"
+        return 1
+    ;;
+esac
+
+# We need to specify -m <mem_size> to overcome a bug in qemu 0.14.0
+# https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/584480
+if [ -z "$mem_set" ] ; then
+  SCRIPT_QEMU_EXTRA_OPT="$SCRIPT_QEMU_EXTRA_OPT -m $mem_size"
+fi
+
+if [ "${FSTYPE:0:3}" = "ext" ]; then
+    KERNCMDLINE="$KERNCMDLINE rootfstype=$FSTYPE"
 fi
 
 if [ "$FSTYPE" = "cpio.gz" ]; then