Paging

[Sploder12]

Description

Provides a way to interact with page tables and directories.
Also identity maps the first 12MiB.
Note: does not do allocation or anything that requires it. Intended for separate PR

Issue #28

Type of change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)

Testing

Existing tests all pass.
In addition, tests were added to verify the identity paging is valid.
And for translation of virtual address to physical address.
And for swapping the active page directory.

Test Configuration:

• qemu 7.2.0 on Windows 10 with WSL 5.10.16.3 running Ubuntu 20.04
• python 3.10.10

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[emilkovacev]

I'm glad I waited a bit longer to make a review, the docs look excellent! I'll try to get a review out today, maybe before our meeting, but no promises

[bicknrown]

overall quite thorough, as far as i can tell, just some minor formatting/linting things and i'll be happy.
thank you for your effort!

[bicknrown]

the branch is also out of date with main, so i would see if that doesn't break anything either.

[emilkovacev]

Superb documentation and commenting! I have but a few small suggestions – the tests run smoothly and qemu still runs well after these changes.

[emilkovacev]

Everything appears to be in order!

Requested minor (non functionality changes). No response since June. Approved by others.