Robert Allan James
dc2f38a1e1
Root cause of the G.1 follow-up boot-time attach race: on pathological controller behavior the xhci_poll_events() drain loop had no hard ceiling. ERDP is written back only when the loop exits, so the controller cannot reclaim event TRBs mid-drain; if it keeps producing events the head can chase the software dequeue pointer forever. xhci_poll_events() never returns, sk_repl_idle() never reaches its bot_msc_attach_pending check, and a fresh USB BOT device that finished SET_CONFIGURATION is left flagged-but-never- attached while the guest appears hung. Fix: bound the drain to a full ring (XHCI_EVT_RING_MAX_DRAIN = 256), so xhci_poll_events() always terminates and always writes ERDP each call. Unprocessed events keep their cycle bit and are re-read next poll; nothing is dropped. On the healthy path one drain processes only the one-or-few events the controller posts per chained command, so the bound never triggers except in the pathological case it breaks. Beyond the G.1 additions: a new macro in include/starkernel/xhci.h and a bounded loop in src/starkernel/usb/xhci.c. Builds clean on amd64. Verified across six consecutive fresh QEMU boots (previously intermittently hung).
src/
Hosted StarForth VM implementation (compiled by the root Makefile).
Bare-metal kernel sources live in src/starkernel/; FORTH word
implementations in src/word_source/; the test harness in
src/test_runner/; platform shims in src/platform/.
Entry point / interpreter core
main.c— CLI entry point, VM init, DoE mode dispatch.vm.c— interpreter loop, stacks, dictionary state (the central runtime file).vm_api.c— external VM API implementation.vm_bootstrap.c— VM bootstrap initialization.vm_debug.c— debugging utilities.vm_time.c— time-related VM operations.vm_internal.h— internal-only declarations shared across thevm_*.cfiles, not part of the publicinclude/vm_api.hsurface.repl.c— REPL read-eval-print loop.cli.c— CLI argument parsing.io.c— I/O operations.log.c— logging infrastructure.
Memory / dictionary / blocks
memory_management.c— dictionary allocator.dictionary_management.c— dictionary allocation and search.dictionary_heat_optimization.c— Loop #1 execution-heat tracking.word_registry.c— word registration system.block_subsystem.c— logical→physical block mapper.blkio_file.c,blkio_ram.c,blkio_factory.c— block I/O backends (file-backed, RAM-backed) and the factory that selects between them.stack_management.c— stack operations.
Physics-driven adaptive runtime (7 feedback loops)
physics_runtime.c— main physics coordinator.physics_hotwords_cache.c— Loop #1 hot-words caching.physics_metadata.c— per-word metadata tracking.physics_pipelining_metrics.c— Loop #4 word-transition prediction.physics_execution_hooks.c— execution instrumentation.rolling_window_of_truth.c— Loop #2 circular execution-history buffer.inference_engine.c— Loops #5/#6, statistical inference (window-width, decay-slope).ssm_jacquard.c— L8 Jacquard steady-state mode selector; consumescompudynamics.cfor tuning-word/config lookups.compudynamics.c— generic compudynamics module (cd_tuning_word(),cd_tuning_vm()); the score/UCB/reward/weight constants for the L8 adaptive table live here, not inssm_jacquard.c.heartbeat_export.c— heartbeat metrics export (CSV export function itself not yet implemented — seedocs/working/architecture/heartbeat_csv_export.md).
Math / measurement
math_portable.c— portable math functions.profiler.c— performance profiling.doe_metrics.c— Design of Experiments metrics (2^7 factorial).
Any .bak file alongside a .c file here (doe_metrics.c.bak,
inference_engine.c.bak, vm.c.bak) is a pre-edit backup left by a past
maintenance script (see scripts/remove_loop_conditionals.sh), not a
build input.