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board: imx8mp: add boot.cmd for distro boot on iMX8MP

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Distro Boot requires a U-Boot-specific script named boot.scr or
boot.scr.uimg which contains boot commands to boot the system. The
boot.cmd is such a file. Use mkimage to generate boot.scr or
boot.scr.uimg from boot.cmd, and the command is:
mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "Distro Boot Script" -d boot.cmd boot.scr.uimg

The boot.cmd file is an example script and can be modified based on
needs. bootargs is set in this script and root uses the default value
"/dev/mmcblk1p2 rootwait rw" which can be changed by overriding mmcroot.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
This commit is contained in:
Alice Guo 2020-12-18 15:19:27 +08:00 • committed by Stefano Babic
parent 9b162b1d1f
commit 10a394ba68
1 changed files with 25 additions and 0 deletions
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25
board/freescale/imx8mp_evk/boot.cmd Normal file
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setenv bootargs console=${console} root=${mmcroot};
for boot_target in ${boot_targets};
do
if test "${boot_target}" = "mmc1" ; then
if fatload mmc 1:${mmcpart} ${kernel_addr_r} ${image}; then
if fatload mmc 1:${mmcpart} ${fdt_addr} ${fdt_file}; then
echo Load image and .dtb from SD card(mmc1);
booti ${kernel_addr_r} - ${fdt_addr};
exit;
fi
fi
fi
if test "${boot_target}" = "mmc2" ; then
if fatload mmc 2:${mmcpart} ${kernel_addr_r} ${image}; then
if fatload mmc 2:${mmcpart} ${fdt_addr} ${fdt_file}; then
echo Load image and .dtb from eMMC(mmc2);
booti ${kernel_addr_r} - ${fdt_addr};
exit;
fi
fi
fi
done