Add zero setters for write-one-to-set bits - #181
Closed
ArthurHeymans wants to merge 4 commits into
Closed
Conversation
Allow callers to select native, low-high, or high-low access for xHCI 64-bit MMIO registers. Keep native access as the default for existing users while making split access available for platforms and controllers that cannot accept native 64-bit MMIO operations.
The USB legacy support control/status register is the second dword of the capability. Map it at base + 4 instead of aliasing the legacy support semaphore register.
The Doorbell Array contains entry zero for the host controller followed by one entry for each device slot. Include that first entry in the accessor length so the highest valid slot ID remains addressable.
Read-modify-write users need to explicitly write zero to unrelated W1S bits. Add set_0 accessors matching the existing RW1C API so updating one field cannot accidentally trigger another write-one action.
This was referenced Aug 5, 2026
Author
|
This PR is part of a stack of 5 bookmarks:
Created with jj-stack |
This was referenced Aug 5, 2026
Author
|
Superseded by the stacked PR: ArthurHeymans#4. |
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Read-modify-write operations on registers with write-one-to-set fields need a way to clear unrelated action bits in the value that will be written back.
Add
set_0_*helpers alongside the existing setters so callers can explicitly write zero to those fields and avoid triggering an unrelated command.