bootscripts: net_upgradeu: add imx8m support

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

board/boundary/bootscripts/net_upgradeu.txt

@@ -15,6 +15,7 @@ offset=0x400
 erase_size=0xC0000
 qspi_offset=0x0
 a_base=0x10100000
+block_size=0x200
 
 if itest.s x51 == "x${imx_cpu}"; then
 	a_base=0x90100000
@@ -22,6 +23,9 @@ elif itest.s x53 == "x${imx_cpu}"; then
 	a_base=0x70100000
 elif itest.s x6SX == "x${imx_cpu}" || itest.s x7D == "x${imx_cpu}"; then
 	a_base=0x80100000
+elif itest.s x8MQ == "x${imx_cpu}"; then
+	a_base=0x42000000
+	offset=0x8400
 fi
 
 qspi_match=1
@@ -33,6 +37,54 @@ setexpr a_script ${a_base}
 
 setenv stdout serial,vga
 
+if itest.s "x${sfname}" == "x" ; then
+# U-Boot resides in (e)MMC
+if itest.s "x${env_dev}" == "x" || itest.s "x${env_part}" == "x"; then
+        echo "Please set env_dev/part to the appropriate values"
+        exit
+fi
+
+# Load bootloader binary for this board
+if tftp ${a_uImage1} u-boot.${uboot_defconfig} ; then
+else
+	echo "File u-boot.${uboot_defconfig} not found on TFTP server" ;
+	exit
+fi
+
+# Compute block count for filesize and offset
+setexpr cntoffset ${offset} / ${block_size}
+setexpr cntfile ${filesize} / ${block_size}
+# Add 1 in case the $filesize is not a multiple of $block_size
+setexpr cntfile ${cntfile} + 1
+
+# Select media partition (if different from main partition)
+mmc dev ${env_dev} ${env_part}
+
+# Read and compare current U-Boot
+mmc read ${a_uImage2} ${cntoffset} ${cntfile}
+if cmp.b ${a_uImage1} ${a_uImage2} ${filesize} ; then
+	echo "------- U-Boot versions match" ;
+	exit ;
+fi
+
+echo "Need U-Boot upgrade" ;
+echo "Program in 5 seconds" ;
+for n in 5 4 3 2 1 ; do
+	echo $n ;
+	sleep 1 ;
+done
+mmc write ${a_uImage1} ${cntoffset} ${cntfile}
+
+# Make sure to boot from the proper partition
+if itest ${env_part} != 0 ; then
+	mmc partconf ${env_dev} 1 ${env_part} 0
+fi
+
+# Switch back to main eMMC partition (to avoid confusion)
+mmc dev ${env_dev}
+
+else
+# U-Boot resides in NOR flash
 if sf probe || sf probe || sf probe 1 27000000 || sf probe 1 27000000 ; then
 	echo "probed SPI ROM" ;
 else
@@ -161,6 +213,7 @@ if itest.s "x" != "x${next}" ; then
 		echo "${next} not found"
 	fi
 fi
+fi
 
 echo "---- U-Boot upgraded. resetting"
 sleep 2