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Does the bootloader load the kernel?
The bootloader has now loaded the Linux kernel into memory, filled the header fields, and then jumped to the corresponding memory address. We now move directly to the kernel setup code.
How do I load a kernel image?
the server on your network.
- Connect the Ethernet cable to the Physical Board (Embedded Processor ).
- Copy the kernel image (uImage) to the /TFTP boot directory of your Linux host workstation.
- Copy the file system image from the /TFTP boot directory of your Linux host workstation.
How do I manually load kernel in grub?
You can load a kernel image by the command @command{kernel} and then run the command @command{boot}. If the kernel requires some parameters, just append the parameters to @command{kernel}, after the file name of the kernel.
How do I fix error loading the kernel first?
Change /dev/sda2 with your root partition , change gpt2 with msdos if you don’t have a GUID partition table. You have to define a kernel file and usually an initrd file and the kernel command line, too, before you can run the boot command (see the Grub documentation).
Where does the kernel start in the boot process?
This image is an exact copy of the file in your hard drive that contains the kernel, e.g. /boot/vmlinuz-2.6.22-14-server. The image is split into two pieces: a small part containing the real-mode kernel code is loaded below the 640K barrier; the bulk of the kernel, which runs in protected mode, is loaded after the first megabyte of memory.
How to boot from a bootable image on Ram?
After loading a bootable image to RAM, you can execute it directly using the bootm command for a uImage kernel or bootz for a zImage kernel. For example, after loading the kernel image above, running bootm 0x70000000 would boot the board using the new image without making any changes to the images stored on the flash.
How do I load an image into U-Boot?
Files are loaded directly into RAM through TFTP. In order to load the image, you must know the physical address of the RAM device on the system. Refer to the documentation for your target board if you are unsure what value to use. The U-Boot environment variable loadaddr should already be set and can be used in place of the hex addresses below.
How are images stored in U-Boot and bootstrap?
NOR flash is directly memory-mapped to the system at a physical address. Also, each image (U-Boot, bootstrap, kernel, filesystem) must be stored at the correct offset for the system to operate correctly. Refer to the documentation for your hardware for more information on the correct address ranges to use.