rajamesandJunie
a8b70e88d3
Source tree reorganization: - Move StarForth v3 engine to v3/ (src/, include/, Makefile) - Move kernel to kernel/ (src/, include/, linker/, Makefile) - Create v4/ skeleton for F18-ISA golden model (DECOMPOSITION.md, JUSTIFICATION.md) - Move FABRIC-0..4.md to docs/fabric/ - Move ONTOLOGY.md and ROADMAP.md to docs/ Board infrastructure: - Add boards/ser5/, boards/raspi/, boards/milkv/, boards/zynq7020/ - Each board has board.mk (ISA, CPU flags, boot recipe) and README.md - Root Makefile becomes thin dispatcher: boot_image, all, clean, docs take TARGET - make boot_image TARGET=SER5|RASPI|MILKV builds one GPT/MBR image per board - ZYNQ7020 target exists but stops with clear error (ARMv7 port not built yet) - scripts/mkdiskimage.sh builds disk images for all boards Docs pipeline: - docs/book/ with LaTeX master (main.tex) and Makefile - pandoc converts Markdown to LaTeX at build time - Two Lua filters: table-widths.lua (wide tables wrap), code-breaks.lua (inline code breaks) - make docs builds single PDF (754 pages, 0 missing characters) - make docs TARGET=<board> adds board appendix - build/docs/<book|board>/meta.tex stamps git commit into PDF Bug fixes: - 42 include paths that only worked by accident now use correct relative paths - clang-18 hardcode replaced with configurable CC variable (fixed aarch64 build) - Pi 5: kernel_2712.img linked at 0x80000, .bss zeroed, memory reserved - Doxyfile, .clang-tidy, README.md, Kconfig paths updated Verified: - Hosted v3 build passes 1012 tests, 0 failures - SER5 image boots in QEMU (OVMF), POST passes, K exact (65536 = Q48_ONE) - Milk-V image boots in QEMU (OpenSBI + U-Boot + bootefi), POST passes - make clean TARGET=<board> removes only that board and its ISA objects - make all builds all boards, hosted v3, and docs in one run Co-authored-by: Junie <junie@jetbrains.com>
68 lines
2.8 KiB
C
68 lines
2.8 KiB
C
/*
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* virtio_input.h — Virtio 1.0 input device driver for StarKernel (item 4.3.5c)
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*
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* riscv64-only today (PCI transport, PLIC interrupt routing). aarch64's
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* 4.3.5e reuses this device identity/event shape over the same PCI
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* transport with GIC routing instead; riscv64/aarch64-specific pieces stay
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* in their own arch trees, not here.
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*
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* Interrupt-driven end to end: the driver pre-posts empty event buffers
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* into the eventq and the device fills+posts them asynchronously, signalled
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* by the PLIC (via 4.3.5b's claim/complete substrate) — no polling.
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*/
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#ifndef STARKERNEL_VIRTIO_INPUT_H
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#define STARKERNEL_VIRTIO_INPUT_H
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#include <stdint.h>
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/* virtio PCI vendor (same device family as virtio-blk) */
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#define VIRTIO_INPUT_PCI_VENDOR_ID 0x1AF4u
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/* Modern-ID formula 0x1040 + VIRTIO_ID_INPUT, VIRTIO_ID_INPUT = 18, per
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* this build host's /usr/include/linux/virtio_ids.h. No legacy/transitional
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* ID exists for virtio-input (postdates the legacy 0.9.5 spec). */
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#define VIRTIO_INPUT_PCI_DEVICE_ID 0x1052u
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/* struct virtio_input_event, per /usr/include/linux/virtio_input.h (BSD
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* licensed, same wire format this driver decodes). */
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typedef struct {
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uint16_t type;
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uint16_t code;
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uint32_t value;
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} VirtioInputEvent;
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/* EV_KEY, per /usr/include/linux/input-event-codes.h */
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#define VIRTIO_INPUT_EV_KEY 0x01u
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/*
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* virtio_input_find_keyboard — locate a virtio-keyboard-pci device on the
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* PCI bus, initialise the driver, compute and
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* enable its PLIC interrupt source (item
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* 4.3.5c's own derivation, FABRIC-0.md §27.5.2),
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* and pre-post the eventq's receive buffers.
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*
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* Returns 0 on success.
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* Returns -1 if no virtio-keyboard-pci device was found on the PCI bus.
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* Returns -2 on driver initialisation failure (bad BAR, queue setup, etc.).
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*/
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int virtio_input_find_keyboard(void);
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/*
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* virtio_input_isr — called from riscv64_interrupt_handler() when the PLIC
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* claim matches this driver's computed source. Reads the
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* ISR-status capability (mandatory — the routed source
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* is level-triggered; skipping this leaves it latched),
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* drains the used ring, pushes decoded EV_KEY events into
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* the diagnostic ring buffer (keyboard_words.c), and
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* re-posts drained buffers to the eventq's avail ring.
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*/
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void virtio_input_isr(void);
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/*
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* virtio_input_pop_event — diagnostic-ring consumer for keyboard_words.c's
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* VKBD-EVENT, same shape as i8042_pop_scancode().
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* Returns 1 and fills *code and *value if an event was available, 0 otherwise.
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*/
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int virtio_input_pop_event(uint16_t *code, uint32_t *value);
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#endif /* STARKERNEL_VIRTIO_INPUT_H */ |