Add Unix socket transport for QEMU testing#9
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Adds a SocketTransport class that connects to QEMU's chardev Unix sockets, enabling end-to-end protocol testing without physical hardware. The transport factory now accepts a `socket://` prefix on the port argument (e.g. `defib burn -c hi3516ev300 -p socket:///tmp/qemu.sock`). flush_input() is a no-op for sockets since, unlike serial ports, there is no stale data to drain — flushing would discard legitimate ACK responses that QEMU has already sent back. Tested against qemu-hisilicon's hisi-fastboot device: full 3-stage transfer (DDR + SPL + 236 KB U-Boot) completes in ~160 ms with CRC validation on every frame. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Mar 30, 2026
Emulates the HiSilicon boot ROM UART download protocol (Protocol 1 - Standard). When QEMU starts without -kernel, the hisi-fastboot device takes over UART0, sends 0x20 handshake bytes, and accepts firmware uploads via HEAD/DATA/TAIL frames with CRC-16/CCITT validation. After all three transfers (DDR init, SPL, U-Boot) complete, the chardev is handed off to a newly-created PL011 and the CPU starts at the U-Boot entry point. The existing -kernel boot path is unchanged. Tested end-to-end with defib (OpenIPC/defib#9): 236 KB OpenIPC U-Boot transferred in ~160 ms over Unix socket. New files: qemu/hw/misc/hisi-fastboot.c - boot ROM protocol device qemu/include/hw/misc/hisi-fastboot.h - public header qemu-boot/test-fastboot-protocol.py - protocol-level test qemu-boot/test-fastboot.sh - end-to-end test with defib Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
SocketTransportclass (src/defib/transport/socket.py) for connecting to QEMU chardev Unix socketscreate_transport()to detectsocket://prefix and route to the new transportUsage
Test plan
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