What is U-Boot image?

What is U-Boot image?

U-Boot uses special format for bootable images. The format is based on binary or text files which can be basically anything, preceded by a special header. the header defines the following image properties: Target Operating System. Target CPU Architecture.

What is the use of U-Boot?

Das U-Boot (subtitled “the Universal Boot Loader” and often shortened to U-Boot; see History for more about the name) is an open-source, primary boot loader used in embedded devices to package the instructions to boot the device’s operating system kernel.

What are the types of image files accepted by bootloader?

The bootloader relies upon the following images.

• Boot. These images contain a kernel and ramdisk image combined using an unmodified mkbootimg (for the implementation, refer to system/core/mkbootimg .
• Kernel. These images use a standard Linux format (such as zImage , Image , or Image.
• Ramdisk.
• File system.

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 the difference between U-Boot and kernel?

The bootloader can be as complex as u-boot which works like mini OS. It supports shell, filesystem, network load etc. Now kernel is basically the main component of Linux or any other OS. A kernel image typically contains device drivers, process management, memory management, and other core components of OS.

How to create a boot image with U-Boot?

Create a boot image containing the FSBL + bitstream + U-Boot (I downloaded the U-Boot sources from the xilinx Git repository). In short, I followed all the steps described on Xilinx User Guide.

How to load Linux kernel images with U-Boot?

This page describes the process of using U-Boot to load Linux kernel and filesystem images from a TFTP server and save them to the local flash for use during the boot process. Review the U-Boot Overview page for an introduction to U-Boot before continuing.

How do I load a file with U-Boot?

Before transferring a file to the system, make sure that it does not exceed the size of the available RAM. The tftp U-Boot command is used to transfer files to the system. The command requires two arguments: the address to load the file into and the filename of the image on the TFTP server.

When to use U-Boot and local flash?

While U-Boot is used to load and execute the OS after initial programming, it can also be used to program the OS images to the local flash. This page describes the process of using U-Boot to load Linux kernel and filesystem images from a TFTP server and save them to the local flash for use during the boot process.