Robert Allan JamesandClaude Sonnet 5
65effbd1ba
Roots out the CSW status FAILED left unexplained in the prior increment: a freshly attached SCSI target's standing UNIT ATTENTION condition, which a bare READ(10) with no retry can never clear. xhci_bot_send_test_unit_ready() sends SCSI TEST UNIT READY (SPC-4 6.33) ahead of the real command; the CSW handler now tags command kind (bot_cmd_kind) to distinguish a TUR completion from a READ10 completion, chains TUR PASS into the real READ(10), and bounded-retries TUR on FAILED/PHASE ERROR (bot_tur_retries, capped at XHCI_BOT_TUR_MAX_RETRIES). xhci_bot_read_block() is the new intended entry point tying lba/num_blocks/block_size + the TUR-first sequencing together. Verified live via a temporary probe (hot-attached disk/usb-thumbdrive-test.img through the running instance's QMP socket), captured on amd64: full chain CBW(TUR) -> FAILED -> retry -> PASS -> CBW(READ10) -> Data-In -> CSW PASS. Probe reverted after capture; all three architectures re-verified clean, probe-free boot to ok>. FABRIC-2.md Section X 2g updated with the writeup. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CXjAPTEKrgY2Mrk25KoLDn
src/starkernel/
LithosAnanke — the bare-metal UEFI kernel that boots StarForth directly on
hardware (amd64/aarch64/riscv64). Built only via Makefile.starkernel; the
only valid acceptance test is the three-arch QEMU boot (see
.claude/CLAUDE.md), never make test.
kernel_main.c— kernel entry point, driving the boot milestones (console init, PMM, VMM, interrupts, timers, kmalloc heap, VM bootstrap).repl.c— kernel REPL.doe_log.c— kernel-side DoE (Design of Experiments) metrics logging.
Subdirectories:
arch/{amd64,aarch64,riscv64}/— per-architecture support (APIC/GIC/ PLIC interrupt controller, timers, boot/ISR assembly).boot/— UEFI loader, ELF loading, kernel command-line parsing.capsule/— capsule birth/run/load/validate pipeline.hal/— hardware-abstraction-layer implementation (console, framebuffer, VT100, memory, host services).hash/— XXHash64 content-addressing implementation.math/— kernel-build Q48.16 fixed-point arithmetic.memory/— physical/virtual memory managers and the kernel heap.pci/— PCI bus enumeration.virtio/— VirtIO block device driver.vm/— kernel VM subsystem (bootstrap, core interpreter, parity logging, capsule arena).
See include/starkernel/README.md for the corresponding headers.