Artemis Milestone 2e (in progress): xHCI Command Ring write path proven live

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Enable Slot command TRB submitted via a new xhci_submit_command()/
xhci_cmd_enable_slot(), ring doorbell 0, confirmed by a real Command
Completion Event on all three architectures -- the first time this driver
has written a TRB rather than only reading the Event Ring (2d). Added the
Command Ring's previously-missing Link TRB (xHCI 1.2 spec sec 4.9.2) for
wraparound correctness.

Port Register connect/disconnect handling, slot-ID/context bookkeeping,
Address Device, and the callback surface into Section U's code are still
open -- this is the discriminating first step, not full 2e.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HZ8kNoTuP63pbQtro4qvrm

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Robert Allan James

2026-08-22 09:37:55 -04:00

co-authored by Claude Sonnet 5

parent 2b16daba16

commit 9c8ad8f6ff

11 changed files with 27242 additions and 2 deletions

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experiments/bare_metal/runs/doe-amd64-20260822-093311.csv

experiments/bare_metal/runs/doe-riscv64-20260822-093549.csv