3ds firmware

A little experiment where I build a toy kernel for the new nintendo 3ds (n3ds).

Building:

I don't really expect anyone to build this so you'll have to change some things I hardcoded if you do want to build and run this:

• Before building, make sure you have the follwing path: /usr/lib/gcc/arm-none-eabi/>version</. (By default, the version is 9.2.1, change this as needed in flags.mk)

• The root level makefile (Makefile) will attempt to copy boot.firm to /media/tim/3437-3631/luma/payloads/, change this as needed.

Building boot.firm:

git clone <this_repo> --recursive
make setup	# install/build dependencies
make		# Compile the code and build the boot.firm image
# In order to recompile you have to 'make clean && make'
# I might switch to meson + ninja in the future to make this less of a problem..

Implemented features

• basic printing
• slab allocator (will be improved as I a get a feel for memory management on this device)
• exception handler
• i2c

Planned features

• double buffering (bank switching)
• mmu
• scrolling text (maybe idk)
• read files from sd card
• gpu driver
• DOOM!

Resources

https://developer.arm.com/documentation/ddi0201/d

https://www.3dbrew.org/wiki/Memory_layout

DDI0360F_arm11_mpcore_r2p0_trm.pdf