영어에서 U-boot 을 사용하는 예와 한국어로 번역
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What is U-boot?
Then use U-Boot commands to load and boot the kernel, dtb and initrd.
The German Submarine U-Boot 96.
U-Boot v2014.10 has introduced a common commandline handling and autoboot framework.
Setting the ethernet MAC address in U-Boot.
Many modern U-Boot versions have USB support and allow booting from USB mass storage devices such as USB sticks.
Please go back and use the u-boot file system.
On systems using U-Boot as system firmware, the ethernet MAC address is placed in the"ethaddr" environment variable.
Your boot partition has not been configured with the u-boot file system.
Saveenv" at the U-Boot prompt to completely disable the relocation of the initial ramdisk and the device-tree blob.
To skip update/change bootloader just don't put u-boot. bin on sdcard. 3.
On some systems, U-Boot predefines a set of environment variables with suitable load addresses: kernel_addr_r, ramdisk_addr_r and fdt_addr_r.
For a number of systems, Debian provides SD card images that contain both U-Boot and the debian-installer.
It can be checked at the U-Boot command prompt with the command“printenv ethaddr” and can be set with the command“setenv ethaddr ca: ff: ee: 12:34:56”.
You can also initiate the USB-boot process any time from the U-Boot prompt by entering the"run bootcmd_usb0" command.
ATF will then initialize the boot core for non-secure execution and drop to non-secure AArch32 EL1 to run U-Boot.
If you would like to trigger the tftp autoboot feature from the U-Boot commandline, you can use the follwing command.
Run bootcmd_dhcp To manually load the bootscript provided by the tarball, you can alternatively issue the following commands at the U-Boot prompt.
If a console variable is defined in U-Boot, the debian-installer boot script automatically passes it to the kernel to set the primary console device and, if applicable, the console baudrate.
Another possibility to circumvent relocation-related problems is to run the command“setenv fdt_high ffffffff; setenv initrd_high 0xffffffff;saveenv” at the U-Boot prompt to completely disable the relocation of the initial ramdisk and the device-tree blob.
If the system has originally used a U-Boot version older than v2014.07 and has been upgraded to a newer version later, the problem might still occur even after upgrading U-Boot.
When booting standard linux images, it is important to load the initial ramdisk image after the kernel and the dtb as U-Boot sets the filesize variable to the size of the last file loaded and the bootz command requires the size of the ramdisk image to work correctly.
For ARM systems that use U-Boot as their system firmware and boot the kernel and the initial ramdisk from external storage media(such as MMC/SD-cards, USB mass storage devices or IDE/SATA harddisks), flash-kernel generates an appropriate boot script to allow autobooting without user interaction.