What is Linux U-Boot?

What is Linux U-Boot?

Das U-Boot (“the Universal Boot Loader” or U-Boot) is an open-source bootloader that can be used on ST boards to initialize the platform and load the Linux® kernel.

What is the use of U-Boot in Linux?

U-Boot runs a command-line interface on a console or a serial port. Using the CLI, users can load and boot a kernel, possibly changing parameters from the default. There are also commands to read device information, read and write flash memory, download files (kernels, boot images, etc.)

What does U-Boot stand for?

Unterseeboot
U-boat, German U-boot, abbreviation of Unterseeboot, (“undersea boat”), a German submarine. The destruction of enemy shipping by German U-boats was a spectacular feature of both World Wars I and II.

How compile U-Boot?

Procedure

1. Download the sources and decompress the archive into a working directory.
2. Enter the U-Boot directory.
3. Configure U-Boot with the following command: make _config.
4. U-Boot uses a basic make command, with CROSS_COMPILE variable. make CROSS_COMPILE= will compile U-Boot.

Is U-Boot a firmware?

U-Boot bootloader allows you to update the firmware of your device over Ethernet. U-Boot uses the TFTP protocol to get the firmware images from a TFTP server running on your computer and programs them onto the eMMC of the device. The devices look for the firmware files in this folder when performing the update.

Does U-Boot use DTB?

The u-boot source uses the u-boot DTB while Linux uses Linux DTB when kernel boots. The u-boot version is a stripped down version as there are not as many peripherals needed to boot. You always use the kernel version for Linux i.e. u-boot passes this one to Linux (as well as load bzImage or vmlinux).

What is U-Boot slab?

U-Boot Beton® is a recycled polypropylene formwork that was designed to create lightened slabs and rafts. U-Boot Beton® is used to create slabs with large span or that are able to support large loads without beams.

Are U-boats and submarines the same thing?

Key Difference: A submarine is a vessel that is capable of propelling itself underwater as well as at the surface of water. U-boats are submarines of Germany which were designed to be used in world wars I and II. Thus, all U-boats are submarines but all submarines are not U-boats.

Are there any surviving U-boats?

Despite their prevalence during WWI and WWII, only four U-boats exist today. Preserved as museum vessels, these “undersea boats” are the last reminders of the Battle of the Atlantic, and the thousands of men who died in these “Iron Coffins.”

How create U-boot image?

Creating a u-boot RAM Disk Image

1. Create a u-boot target image using the following platform project configure options:
2. Build the target platform image.
3. Launch the menuconfig configuration tool for the kernel.
4. Set kernel options for u-boot support.

What is U-boot SCR?

scr is a user-defined image file that is read before loading uImage, allowing the user to supersede the loading of uImage, preventing the user from recompiling uImage.

Is U-Boot Linux?

U-Boot is the most popular boot loader in linux based embedded devices. It is released as open source under the GNU GPLv2 license.

How to change the boot method in U-Boot?

Set operating system. bootm command of u-boot changes boot method by os type. Pass -h as the OS to see the list of supported OS. Set image type. Pass -h as the image to see the list of supported image type.

What is the mkimage command for U-Boot?

The mkimage command is used to create images for use with the U-Boot boot loader. These images can contain the linux kernel, device tree blob, root file system image, firmware images etc., either separate or combined.

What is the Makefile for U-Boot embedded Linux?

For each supported board, U-Boot’s Makefile includes a BOARD_NAME_config target, which is used to configure U-Boot’s build for the designated board. The configuration target for the TQM860L board I use for my control module, for example, is TQM860L_config.

Which is the best boot loader for Linux?

Das U-Boot — the Universal Boot Loader U-Boot is the most popular boot loader in linux based embedded devices. It is released as open source under the GNU GPLv2 license. It supports a wide range of microprocessors like MIPS, ARM, PPC, Blackfin, AVR32 and x86.