You’ve got to love collaboration. Especially on documentation. The github repo 0xAX/linux-insides has a fantastic set of resources that describe the Linux boot process in great detail.
The entire collaborative project is available on Github.
It features:
- Step 1: From the bootloader to the kernel
- Step 2: First steps in the kernel setup
- Step 3: Video mode initialization and transition to protected mode
I suggest you take your time for these, as they’re quite lengthy and go into great detail.
This project reminded me of another successful collaboration: What happens when you type google.com into your browser’s address box and press enter?. That project goes into great depths on all the technical details of web browsing over HTTP/1.1 and the web in general.