Contents
What do I need to use U-boot image?
The Linux image and the ramdisk/initramfs files requires a U-Boot header file in order to be used in the boot command, so mkimage tool is used to add the extra information. ?
Can a kernel image be wrapped in U-Boot?
If the kernel image is build from the repository, the build process includes a last step where the U-Boot wrapper is added to the image and a uImage file is generated, however for Petalinux releases, as far as a FIT image mode is used by default the kernel image is not wrapped. ? ?
What do I need to do to boot AArch64 Linux?
The CPU must be in either EL2 (RECOMMENDED in order to have access to the virtualisation extensions) or non-secure EL1. The MMU must be off. The instruction cache may be on or off, and must not hold any stale entries corresponding to the loaded kernel image. The address range corresponding to the loaded kernel image must be cleaned to the PoC.
How to create an initramfs image from scratch?
To create an initramfs from scratch, tools such as Buildroot or Yocto may be used to populate the filesystem (with BusyBox, tools, etc.). Alternatively, initramfs image may be created by populating a directory with the desired filesystem contents and packing these contents into a cpio.gz archive as mentioned above.
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.
How to create a legacy image in U-Boot?
Create legacy image with compressed PowerPC Linux kernel: Create FIT image with compressed PowerPC Linux kernel: Create FIT image with compressed kernel and sign it with keys in the /public/signing-keys directory. Add corresponding public keys into u-boot.dtb, skipping those for which keys cannot be found. Also add a comment.
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.