Difference between revisions of "Transclusion: UCM-iMX7: U-Boot: Boot from eMMC"
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* Alternatively, you can use the following U-Boot commands to configure eMMC as the main storage for both Linux kernel and root filesystem images: | * Alternatively, you can use the following U-Boot commands to configure eMMC as the main storage for both Linux kernel and root filesystem images: | ||
<pre> | <pre> | ||
| − | + | env default -a | |
| − | + | setenv bootdelay 3 | |
| − | + | setenv kernel zImage | |
| − | + | setenv loadaddr 0x80800000 | |
| − | + | setenv fdtfile imx7d-sbc-ucm-imx7.dtb | |
| − | + | setenv fdtaddr 0x83000000 | |
| − | + | setenv mmcroot "/dev/mmcblk2p2 rootwait rw" | |
| − | + | setenv loadimage 'load mmc 1:1 ${loadaddr} ${kernel}' | |
| − | + | setenv loadfdt 'load mmc 1:1 ${fdtaddr} ${fdtfile}' | |
| − | + | setenv bootargs "console=ttymxc0,115200 root=${mmcroot}" | |
| − | + | setenv bootcmd 'run loadimage; run loadfdt; bootz ${loadaddr} - ${fdtaddr}' | |
</pre> | </pre> | ||
* To save this configuration: | * To save this configuration: | ||
<pre> | <pre> | ||
| − | + | saveenv | |
</pre> | </pre> | ||
* To boot Linux type: | * To boot Linux type: | ||
<pre> | <pre> | ||
| − | + | boot | |
</pre> | </pre> | ||
Latest revision as of 12:45, 22 August 2017
- The default U-Boot environment configuration falls back to boot from the internal storage eMMC if no proper images are found on a micro SD card.
- Alternatively, you can use the following U-Boot commands to configure eMMC as the main storage for both Linux kernel and root filesystem images:
env default -a
setenv bootdelay 3
setenv kernel zImage
setenv loadaddr 0x80800000
setenv fdtfile imx7d-sbc-ucm-imx7.dtb
setenv fdtaddr 0x83000000
setenv mmcroot "/dev/mmcblk2p2 rootwait rw"
setenv loadimage 'load mmc 1:1 ${loadaddr} ${kernel}'
setenv loadfdt 'load mmc 1:1 ${fdtaddr} ${fdtfile}'
setenv bootargs "console=ttymxc0,115200 root=${mmcroot}"
setenv bootcmd 'run loadimage; run loadfdt; bootz ${loadaddr} - ${fdtaddr}'
- To save this configuration:
saveenv
- To boot Linux type:
boot
