1

Is it possible to redirect GRUB2 output to a MMIO serial UART?

For example I have a UART that is displayed in a Linux boot log as:

AMDI0020:01: ttyS5 at MMIO 0xfedca000 (irq = 4, base_baud = 3000000) is a 16550A

To get kernel boot log, I just add this kernel parameter:

console=uart,mmio32,0xfedca000,115200n8

But how to redirect GRUB2 output to such kind of UART?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.