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The kernel used to inherit whatever GOP mode the firmware picked
(QEMU/OVMF gave 1280x800). Now every surface derives from a fixed
800x600 canvas:
- uefi: typed EfiGopQueryMode/SetMode/GetMode fn pointers in
GraphicsOutputProtocol (were raw *mut c_void, never called).
- gop::select_gop_mode: scan the mode list for an exact 800x600
(32-bit BGR/RGB only, the driver assumes 4 Bpp), SetMode it; fall
back to the smallest mode that fits the canvas, then to the
firmware's choice. SetMode may move both the mode info pointer and
the framebuffer base, so both are re-read after the switch. Boot
log: 'gop: mode 3 selected — 800x600 (was 1280x800)'.
- tests: relative assertions are resolution-agnostic; test-gfx and
test-mouse had a boot-log race (shell line prints before the cursor
task line) — now wait for the cursor line instead of grepping once.
All four suites pass at 800x600. 0 build warnings.
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- uefi.rs: full EFI_RUNTIME_SERVICES layout with reset_system at index 10
(spec order); EfiResetSystem type + RESET_* constants
- power.rs: stash the runtime-services table pre-EBS; poweroff() calls
ResetSystem(EfiResetShutdown) — still callable after ExitBootServices
because we never call SetVirtualAddressMap, so the pointers keep
working with physical addresses; falls back to the hlt loop
- shell: 'poweroff' and 'exit' shut the machine down (QEMU exits),
'halt' keeps the plain hlt loop
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- uefi.rs: full EfiMemoryType constants (0-14) + memory_type_name(); fix
MEMORY_TYPE_LOADER_DATA from 6 to 2 per the UEFI spec
- memory.rs: replace the bump allocator with a first-fit free-list heap
(splitting, coalescing, 8-byte back-pointer for alignment-safe free);
add a bitmap physical page allocator (heap region reserved, page-0
guard, aligned runs); grow the heap from the page allocator on demand
- paging.rs: identity page-table helpers — adopt_tables() rebuilds the
firmware map into our own tables (OVMF maps its tables read-only, so
the firmware tree can't be modified in place) and switches CR3;
map_page/unmap_page/is_mapped with 2 MB/1 GB large-page splitting
- main.rs: boot self-tests for heap, pages, and paging
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Architecture:
rs-dos/ (workspace root, was raisernics/)
├── rsnix/ — kernel lib crate (uefi, serial, gop, ps2, interrupts, memory)
├── shell/ — shell lib crate (prompt, commands, line input)
├── rsdos/ — binary crate (efi_main, init, panic handler)
└── rsboot/ — future git submodule
No functional changes — boots to shell prompt identically.
Version auto-pulled from Cargo.toml via env!("CARGO_PKG_VERSION").
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