VirtIO now properly scans 8 MMIO slots, detects legacy vs modern mode,
uses correct virtqueue page alignment for legacy, and reads sectors.
Fixed disk image script to force FAT16 (mformat was creating FAT32).
init.elf successfully loaded from FAT16 disk via VirtIO on QEMU.
Adapter probes for VirtIO block device, reads init.elf from FAT16 disk,
parses ELF, maps into userspace, and launches. Falls back to embedded
minimal init if no disk is present.
Also: VirtIO MMIO driver, boot FAT16 reader, disk image build script,
Makefile targets for build/run/run-disk.
Adapter now: parses init binary (ELF or raw), allocates pages, creates
user page table, sets thread entry point in SavedContext, enters U-mode.
Init takes over from there — no more IPC demo hardcoded in the adapter.
- Halt syscall: only pid 0 (init) can halt, adapter uses SBI SRST
- Fault notification: kernel delivers fault info to process fault handler endpoint before killing
- Supervisor: tracks restart counts, back-off up to 5 restarts
- Shutdown: notifies servers, waits with timeout, calls halt
- Trap handler: faults now call kernel.handle_fault instead of halting
Add Priority::DEFAULT and TimeSlice::DEFAULT to types crate.
All QEMU virt addresses consolidated in board.rs.
Structure mirrors future adapter-arm/ layout.
