How to bring up the Linux Kernel on a new platform
werwolv.net69 points by WerWolv 4 days ago
69 points by WerWolv 4 days ago
I've done this for a cortex-m in qemu (meaning I wrote the chip and peripheral emulation code too for the timer, uart, sd controller with dma, and rcc). But I used buildroot. So much easier to keep track of everything and it's very easy to start with (unlike yocto). I recommend taking a look at buildroot.
You also don't need an MMU to run Linux. Just helps compatibility.
Good work
Excellent post. Your file format RE looks like an additional one to add to the reading queue as well: https://werwolv.net/posts/file_format_reverse_engineering/
Great post, so neat to see it running in the browser! One question: why not thin the config a little? USB, SOUND, VGA, etc. are all slowing down the boot but don't have hardware to control.
This is a valid point a friend brought up as well. There's no reason all of this is enabled except for keeping the config simple. I only recently learned about `make tinyconfig` though which should let you creating a absolutely minimal config to start off of. I might add that as a note at the end
This complicated project was well executed, and I enjoyed it. I'm sorry your post wasn't more popular, I hope you won't be discouraged from sharing your adventures in the future!