draft: loader MMU changes, map RAM (and only RAM)#5
Draft
midnightveil wants to merge 4 commits into
Draft
Conversation
As opposed to them being accessed via global variables directly. The reason to do this is to enable us to vary the page table placement from the C side without needing to touch or modify the assembly any further, which will enable the future commits for making the number of page page table structures dynamic, which is necessary for making the loader 1:1 all of RAM. Also, remove some redundant stack pops/pushs to util64.S. Signed-off-by: Julia Vassiliki <[email protected]>
This performs cleanups to the loader code, to remove a bunch of boilerplate, and also makes the page table entries placed in the loader binary at the end. This is in preparation for moving towards mapping all of RAM in the loader. Signed-off-by: Julia Vassiliki <[email protected]>
Signed-off-by: Julia Vassiliki <[email protected]>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The intent of this is to allow us to enable the MMU earlier in boot and speed up loader copies.
However, something in the commit labelled as such breaks SMP boot; I'm not entirely sure what... (that is, dynamically allocated PTs).
Opening as draft in case some one wants to pick this up later.