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fdt_addr=0x43000000
image=Image
script=boot.scr
mmc_root="PARTUUID=70672ec3-5eee-49ff-b3b1-eb1fbd406bf5"
sd_root="/dev/mmcblk1p2"
# Check boot device to decide which root partition to use
if test ${bootdev} = 1; then
setenv root ${sd_root}
else
setenv root ${mmc_root}
fi
if test ${baseboardid} = 1; then
setenv fdt_file fsl-imx8mq-phanbell.dtb
elif test ${baseboardid} = 2; then
setenv fdt_file fsl-imx8mq-yorktown.dtb
else
# EVT Boards have quirky baseboard ID resistors, so fall back
# to phanbell if we're unsure what the board is.
echo "Unknown baseboard revision, selecting phanbell dtb."
setenv fdt_file fsl-imx8mq-phanbell.dtb
fi
cmdline="console=ttymxc0,115200 console=tty0 earlycon=ec_imx6q,0x30860000,115200 root=${root} rootfstype=ext4 rw rootwait init=/sbin/init net.ifnames=0 pci=pcie_bus_perf"
ext2load mmc ${bootdev}:1 ${loadaddr} ${image}
setenv bootargs ${cmdline} ${extra_bootargs}
#Load base device tree.
ext2load mmc ${bootdev}:1 ${fdt_addr} ${fdt_file}
fdt addr ${fdt_addr}
fdt resize 4096 # PORTILOOP: Add extra 4096 bytes to fit overlay
# Load overlays to arbitrary address beyond fdt location (will apply them later).
setexpr fdtovaddr ${fdt_addr} + F000
# Parse overlays.txt and apply individual overlays.
if ext2load mmc ${bootdev}:1 ${fdtovaddr} overlays.txt && env import -t ${fdtovaddr} ${filesize} && test -n ${overlay}; then
echo loaded overlay.txt: ${overlay}
for ov in ${overlay}; do
if ext2load mmc ${bootdev}:1 ${fdtovaddr} ${ov}.dtbo && fdt apply ${fdtovaddr}; then
echo overlay of ${ov} successful
else
echo overlay failed, reverting to original device tree
ext2load mmc ${bootdev}:1 ${fdt_addr} ${fdt_file}
booti ${loadaddr} - ${fdt_addr}
fi
done
fi
if printenv m4enabled; then
if test ${m4enabled} = 1; then
if ext2load mmc ${bootdev}:1 ${fdtovaddr} fsl-imx8mq-phanbell-m4.dtbo && fdt apply ${fdtovaddr}; then
echo M4 overlay loaded, starting core
run m4boot
else
echo M4 overlay failed
fi
fi
fi
booti ${loadaddr} - ${fdt_addr}
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