Compare commits
3 Commits
Vendored
-1
@@ -4,7 +4,6 @@
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"name": "Linux",
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"includePath": [
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"${workspaceFolder}/**",
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"gnu-efi/inc/",
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"include/"
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],
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"defines": [],
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Vendored
-9
@@ -1,9 +0,0 @@
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{
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"makefile.launchConfigurations": [
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{
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"cwd": "/home/patrick/Sylva/build",
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"binaryPath": "/home/patrick/Sylva/build/Kernel.elf",
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"binaryArgs": []
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}
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]
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}
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@@ -50,9 +50,26 @@ All `string_utils.h` helpers are `static inline` — header-only, no link issues
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## Conventions
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- **Commits:** `[type] message` — types: `feat`, `fix`, `chore`, `docs`, `refactor` (see `git log`).
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- **Commits:** `[type] message` — types: `feat`, `fix`, `chore`, `docs`, `refactor`, `optm` (see `git log`).
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- **Languages:** C17 (`boot.c`), C++17 (`kernel/`) — `-ffreestanding -fno-stack-protector -fshort-wchar -mno-red-zone -fcf-protection=none`. Kernel adds `-DGNU_EFI_USE_MS_ABI -fno-pic`.
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- **`kernel_main` must be `extern "C"`** — `boot.c` (C) calls into C++ (`kernel/entry.cpp:6`).
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- **All UEFI protocol calls must use `uefi_call_wrapper`** — calling the member fn directly page-faults in long mode. See `kernel/main.cpp:23-24` and throughout.
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- **Kernel linked at `0x100000`** (`kernel/kernel.ld`); `.bss` start/end symbols exposed as `__bss_start` / `__bss_end`.
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- **No tests, no CI, no lint config** — `make` is the only verification step. Boot by hand in QEMU to confirm kernel output in `serial.log`.
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## Global state
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| Symbol | File | Type |
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|--------|------|------|
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| `ST` | `kernel/entry.cpp` | `EFI_SYSTEM_TABLE*` — saved from UEFI boot |
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| `g_gfx` | `include/graphics/context.h` | `gfx_context` — GOP framebuffer info |
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| `g_draw_target` | `include/graphics/context.h` | `draw_target` — current draw surface |
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| `g_pmm` | `include/memory/pmm.h` | `pmm_t` — physical page allocator state |
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| `g_serial` | `kernel/serial.cpp` | `serial_context` — serial protocol handle |
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## Gotchas
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- **No paging** — kernel runs in physical memory, identity-mapped.
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- **No libc** — all string/memory ops go through `string_utils.h` (header-only, `static inline`).
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- **Window switching** uses Shift+F10 (hardcoded PS/2 scan codes in `kernel/graphics/layer.cpp`).
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- **`third_party/`** is empty — no external deps beyond bundled gnu-efi in `efi/`.
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@@ -18,7 +18,7 @@ BOOT_OBJ = build/boot.o
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KERNEL_ASMFLAGS = -Iinclude -Iefi/inc -ffreestanding -fno-stack-protector -fno-stack-check \
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-fshort-wchar -mno-red-zone -fcf-protection=none -g
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KERNEL_CPP := $(shell find kernel graphics fonts -name '*.cpp' -type f)
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KERNEL_CPP := $(shell find kernel graphics fonts devices -name '*.cpp' -type f)
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KERNEL_ASM := $(shell find kernel -name '*.S' -type f)
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KERNEL_OBJ := $(KERNEL_CPP:%.cpp=build/%.o) $(KERNEL_ASM:%.S=build/%.o)
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@@ -0,0 +1,75 @@
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#include <devices/cursor.h>
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#include <devices/mouse.h>
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#include <graphics/draw.h>
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#include <graphics/context.h>
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#include <memory/heap.h>
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#include <common.h>
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// 经典箭头光标位图 (12x16)
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// 0=透明, 1=白色填充, 2=黑色轮廓
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static const SUINT8 g_cursor_bitmap[CURSOR_H][CURSOR_W] = {
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{2,0,0,0,0,0,0,0,0,0,0,0},
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{2,2,0,0,0,0,0,0,0,0,0,0},
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{2,1,2,0,0,0,0,0,0,0,0,0},
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{2,1,1,2,0,0,0,0,0,0,0,0},
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{2,1,1,1,2,0,0,0,0,0,0,0},
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{2,1,1,1,1,2,0,0,0,0,0,0},
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{2,1,1,1,1,1,2,0,0,0,0,0},
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{2,1,1,1,1,1,1,2,0,0,0,0},
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{2,1,1,1,1,1,1,1,2,0,0,0},
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{2,1,1,1,1,1,1,1,1,2,0,0},
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{2,1,1,1,1,1,2,2,2,2,2,0},
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{2,1,1,2,1,2,0,0,0,0,0,0},
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{2,1,2,0,0,2,0,0,0,0,0,0},
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{2,2,0,0,0,0,2,0,0,0,0,0},
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{2,0,0,0,0,0,2,0,0,0,0,0},
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{0,0,0,0,0,0,0,0,0,0,0,0},
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};
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static layer_t* g_cursor_layer = NULL;
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void cursor_init(void) {
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g_cursor_layer = layer_create("cursor", LAYER_TYPE_MOUSE, CURSOR_W, CURSOR_H);
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if (!g_cursor_layer) return;
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layer_set_z(g_cursor_layer, 9999);
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// 将位图写入图层缓冲区，Reserved 用作 alpha（0=透明, 255=不透明）
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL* buf = g_cursor_layer->buffer;
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for (UINT32 y = 0; y < CURSOR_H; y++) {
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for (UINT32 x = 0; x < CURSOR_W; x++) {
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL* dst = &buf[y * CURSOR_W + x];
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SUINT8 px = g_cursor_bitmap[y][x];
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if (px == 1) {
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dst->Blue = 255; dst->Green = 255; dst->Red = 255; dst->Reserved = 255;
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} else if (px == 2) {
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dst->Blue = 0; dst->Green = 0; dst->Red = 0; dst->Reserved = 255;
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} else {
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dst->Blue = 0; dst->Green = 0; dst->Red = 0; dst->Reserved = 0;
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}
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}
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}
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// 初始位置：屏幕中心
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layer_set_pos(g_cursor_layer,
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(SSINT32)(g_gfx.hr / 2),
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(SSINT32)(g_gfx.vr / 2));
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}
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void cursor_update(void) {
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if (!g_cursor_layer) return;
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SSINT32 cx = (SSINT32)(g_gfx.hr / 2) + mouse_get_x();
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SSINT32 cy = (SSINT32)(g_gfx.vr / 2) + mouse_get_y();
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if (cx < 0) cx = 0;
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if (cy < 0) cy = 0;
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if (cx + (SSINT32)CURSOR_W > (SSINT32)g_gfx.hr) cx = (SSINT32)g_gfx.hr - CURSOR_W;
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if (cy + (SSINT32)CURSOR_H > (SSINT32)g_gfx.vr) cy = (SSINT32)g_gfx.vr - CURSOR_H;
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layer_set_pos(g_cursor_layer, cx, cy);
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}
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layer_t* cursor_get_layer(void) {
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return g_cursor_layer;
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}
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@@ -0,0 +1,170 @@
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#include <devices/mouse.h>
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#include <interrupt/idt.h>
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#include <interrupt/pic.h>
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#include <serial.h>
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static inline void outb(UINT16 port, UINT8 val) {
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ASM("outb %0, %1" : : "a"(val), "Nd"(port));
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}
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static inline UINT8 inb(UINT16 port) {
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UINT8 ret;
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ASM("inb %1, %0" : "=a"(ret) : "Nd"(port));
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return ret;
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}
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// 等待 PS/2 控制器输入缓冲区清空
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static void ps2_wait_input(void) {
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for (int i = 0; i < 100000; i++) {
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if (!(inb(PS2_STATUS_PORT) & PS2_STAT_IBF)) return;
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}
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}
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// 等待 PS/2 控制器输出缓冲区有数据
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static void ps2_wait_output(void) {
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for (int i = 0; i < 100000; i++) {
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if (inb(PS2_STATUS_PORT) & PS2_STAT_OBF) return;
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}
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}
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// 向 PS/2 控制器发送命令
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static void ps2_write_cmd(UINT8 cmd) {
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ps2_wait_input();
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outb(PS2_CMD_PORT, cmd);
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}
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// 读取 PS/2 控制器返回的数据
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static UINT8 ps2_read_data(void) {
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ps2_wait_output();
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return inb(PS2_DATA_PORT);
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}
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// 向辅助端口（鼠标）发送数据
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static void ps2_write_mouse(UINT8 data) {
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ps2_write_cmd(0xD4); // Write to Auxiliary Device
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ps2_wait_input();
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outb(PS2_DATA_PORT, data);
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}
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// 鼠标 3 字节数据包状态
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static int g_pkt_phase = 0; // 0=byte0, 1=byte1, 2=byte2
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static UINT8 g_pkt_byte0 = 0;
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static UINT8 g_pkt_byte1 = 0;
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// 鼠标光标位置（相对于屏幕中心）
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static volatile SSINT32 g_mouse_x = 0;
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static volatile SSINT32 g_mouse_y = 0;
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static volatile bool g_mouse_btn_l = false;
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static volatile bool g_mouse_btn_r = false;
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static volatile bool g_mouse_btn_m = false;
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// IRQ12 处理函数
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static void mouse_irq_handler(trap_frame* frame) {
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(void)frame;
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pic_send_eoi(PS2_MOUSE_IRQ);
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// 读取状态寄存器，检查输出缓冲区是否有数据
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UINT8 status = inb(PS2_STATUS_PORT);
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if (!(status & PS2_STAT_OBF)) return;
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UINT8 data = inb(PS2_DATA_PORT);
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// 解析 3 字节数据包
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switch (g_pkt_phase) {
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case 0: // byte 0: 按钮 + 标志
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if (!(data & PS2_MOUSE_ALWAYS1)) return; // 无效字节，重新同步
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g_pkt_byte0 = data;
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g_pkt_phase = 1;
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break;
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case 1: // byte 1: X delta
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g_pkt_byte1 = data;
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g_pkt_phase = 2;
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break;
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case 2: // byte 2: Y delta
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g_pkt_byte0 = g_pkt_byte0; // 确保编译器不优化
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g_pkt_byte1 = g_pkt_byte1;
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// 解析按钮状态
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g_mouse_btn_l = (g_pkt_byte0 & PS2_MOUSE_LEFT) != 0;
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g_mouse_btn_r = (g_pkt_byte0 & PS2_MOUSE_RIGHT) != 0;
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g_mouse_btn_m = (g_pkt_byte0 & PS2_MOUSE_MIDDLE) != 0;
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// 解析 X delta
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SSINT32 dx = (SSINT32)(SSINT8)g_pkt_byte1;
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if (g_pkt_byte0 & PS2_MOUSE_X_SIGN) dx |= 0xFFFFFF00;
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// 解析 Y delta
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SSINT32 dy = (SSINT32)(SSINT8)data;
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if (g_pkt_byte0 & PS2_MOUSE_Y_SIGN) dy |= 0xFFFFFF00;
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// 更新光标位置（Y 轴在屏幕上向下为正）
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g_mouse_x += dx;
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g_mouse_y -= dy;
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g_pkt_phase = 0;
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break;
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}
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}
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// 丢弃输出缓冲区中的残留数据
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static void ps2_flush_output(void) {
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for (int i = 0; i < 100; i++) {
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inb(PS2_DATA_PORT);
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}
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}
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void mouse_init(void) {
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// 1. 控制器自检（必须在命令字节写入之前，因为自检会重置命令字节）
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ps2_write_cmd(PS2_CMD_SELF_TEST);
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UINT8 self_test = ps2_read_data();
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if (self_test != 0x55) {
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serial_write("MOUSE: self-test FAILED\n");
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}
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// 2. 丢弃自检可能产生的残留数据
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ps2_flush_output();
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// 3. 启用辅助端口（鼠标）
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ps2_write_cmd(PS2_CMD_ENABLE_A2);
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// 4. 读取当前命令字节
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ps2_write_cmd(PS2_CMD_READ_MB);
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UINT8 cmd = ps2_read_data();
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// 5. 启用 IRQ12 + IRQ1
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cmd |= PS2_CMD_IRQ12 | PS2_CMD_IRQ1;
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// 6. 写入修改后的命令字节（在自检之后，不会被重置）
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ps2_write_cmd(PS2_CMD_WRITE_MB);
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ps2_wait_input();
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outb(PS2_DATA_PORT, cmd);
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// 7. 验证命令字节已写入
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ps2_write_cmd(PS2_CMD_READ_MB);
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UINT8 verify = ps2_read_data();
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if (verify != cmd) {
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serial_write("MOUSE: cmd verify mismatch\n");
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}
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// 重置鼠标
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ps2_write_mouse(PS2_MOUSE_RESET);
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UINT8 ack = ps2_read_data();
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if (ack == 0xFA) {
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ps2_read_data(); // 丢弃第二字节
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}
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// 启用鼠标数据上报
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ps2_write_mouse(PS2_MOUSE_ENABLE);
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ps2_read_data();
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// 注册 IRQ12 处理函数并取消屏蔽
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idt_set_handler(PS2_MOUSE_VECTOR, mouse_irq_handler);
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pic_unmask_irq(2); // 取消主片级联屏蔽
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pic_unmask_irq(PS2_MOUSE_IRQ);
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}
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SSINT32 mouse_get_x(void) { return g_mouse_x; }
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SSINT32 mouse_get_y(void) { return g_mouse_y; }
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bool mouse_get_btn_left(void) { return g_mouse_btn_l; }
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bool mouse_get_btn_right(void) { return g_mouse_btn_r; }
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bool mouse_get_btn_middle(void) { return g_mouse_btn_m; }
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@@ -0,0 +1,12 @@
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#pragma once
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#include <common.h>
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#include <graphics/layer.h>
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#define CURSOR_W 12
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#define CURSOR_H 16
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void cursor_init(void);
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void cursor_update(void);
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layer_t* cursor_get_layer(void);
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@@ -0,0 +1,48 @@
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#pragma once
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#include <common.h>
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#define PS2_MOUSE_IRQ 12
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#define PS2_MOUSE_VECTOR (PIC_IRQ_BASE + PS2_MOUSE_IRQ)
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// PS/2 controller ports
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#define PS2_DATA_PORT 0x60
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#define PS2_STATUS_PORT 0x64
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#define PS2_CMD_PORT 0x64
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// PS/2 controller commands
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#define PS2_CMD_READ_MB 0x20 // Read command byte
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#define PS2_CMD_WRITE_MB 0x60 // Write command byte
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#define PS2_CMD_ENABLE_A2 0xA8 // Enable auxiliary (second) port
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#define PS2_CMD_SELF_TEST 0xAA // Controller self-test
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// PS/2 command byte bits
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#define PS2_CMD_IRQ12 0x02 // Enable IRQ12 (auxiliary device)
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#define PS2_CMD_IRQ1 0x01 // Enable IRQ1 (keyboard)
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// PS/2 controller status bits
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#define PS2_STAT_OBF 0x01 // Output buffer full (data ready)
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#define PS2_STAT_IBF 0x02 // Input buffer full (controller busy)
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// PS/2 mouse commands
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#define PS2_MOUSE_ENABLE 0xF4 // Enable data reporting
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#define PS2_MOUSE_DISABLE 0xF5 // Disable data reporting
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#define PS2_MOUSE_RESET 0xFF // Reset mouse
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// Mouse packet byte 0 flags
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#define PS2_MOUSE_LEFT 0x01
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#define PS2_MOUSE_RIGHT 0x02
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#define PS2_MOUSE_MIDDLE 0x04
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#define PS2_MOUSE_ALWAYS1 0x08
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#define PS2_MOUSE_X_SIGN 0x10
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#define PS2_MOUSE_Y_SIGN 0x20
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#define PS2_MOUSE_X_OVER 0x40
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#define PS2_MOUSE_Y_OVER 0x80
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void mouse_init(void);
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SSINT32 mouse_get_x(void);
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SSINT32 mouse_get_y(void);
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bool mouse_get_btn_left(void);
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bool mouse_get_btn_right(void);
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bool mouse_get_btn_middle(void);
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+11
-23
@@ -5,6 +5,7 @@
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#include <memory/pmm.h>
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#include <scheduler.h>
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#include <serial.h>
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#include <devices/cursor.h>
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#include <interrupt/idt.h>
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#include <interrupt/pic.h>
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#include <string_utils.h>
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@@ -102,12 +103,6 @@ layer_t* layer_create(const char* name, layer_type_t type, UINT32 w, UINT32 h) {
|
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layer_insert_sorted(layer);
|
||||
|
||||
serial_write("LAYER: created '");
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serial_write(name);
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serial_write("' id=");
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serial_write_hex(id);
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serial_write("\n");
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return layer;
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}
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||||
@@ -126,10 +121,6 @@ void layer_destroy(layer_t* layer) {
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g_switch_target = NULL;
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g_switch_pending = false;
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||||
}
|
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|
||||
serial_write("LAYER: destroyed '");
|
||||
serial_write(layer->name);
|
||||
serial_write("'\n");
|
||||
}
|
||||
|
||||
layer_t* layer_get_by_id(UINT32 id) {
|
||||
@@ -234,16 +225,10 @@ void layer_init(void) {
|
||||
// 注册键盘 IRQ 并取消屏蔽
|
||||
idt_set_handler(PIC_IRQ_BASE + 1, ps2_irq_handler);
|
||||
pic_unmask_irq(1);
|
||||
|
||||
serial_write("LAYER: compositor init OK (back buffer = ");
|
||||
serial_write_hex(buf_size);
|
||||
serial_write(" bytes)\n");
|
||||
}
|
||||
|
||||
// 合成器任务
|
||||
void layer_compositor_task(void) {
|
||||
serial_write("LAYER: compositor task running\n");
|
||||
|
||||
UINT32 hr = g_gfx.hr;
|
||||
UINT32 vr = g_gfx.vr;
|
||||
|
||||
@@ -255,12 +240,12 @@ void layer_compositor_task(void) {
|
||||
if (target && target->visible && target->type == LAYER_TYPE_WINDOW) {
|
||||
g_focused = target;
|
||||
layer_set_z(target, 99);
|
||||
serial_write("LAYER: Shift+F10 -> '");
|
||||
serial_write(target->name);
|
||||
serial_write("'\n");
|
||||
}
|
||||
}
|
||||
|
||||
// 更新光标位置
|
||||
cursor_update();
|
||||
|
||||
// 清除后台缓冲区
|
||||
EFI_GRAPHICS_OUTPUT_BLT_PIXEL black = {0, 0, 0, 0};
|
||||
draw_set_target(g_back_buffer, hr, vr);
|
||||
@@ -281,14 +266,17 @@ void layer_compositor_task(void) {
|
||||
if (dy + (SSINT32)sh > (SSINT32)vr) sh = vr - dy;
|
||||
if (sw == 0 || sh == 0) { cur = cur->next; continue; }
|
||||
|
||||
bool use_alpha = (cur->type == LAYER_TYPE_MOUSE);
|
||||
for (UINT32 row = 0; row < sh; row++) {
|
||||
EFI_GRAPHICS_OUTPUT_BLT_PIXEL* src = cur->buffer + ((UINTN)cur->w * (sy + row)) + sx;
|
||||
EFI_GRAPHICS_OUTPUT_BLT_PIXEL* dst = g_back_buffer + ((UINTN)hr * (dy + row)) + dx;
|
||||
for (UINT32 col = 0; col < sw; col++) {
|
||||
dst->Blue = src->Blue;
|
||||
dst->Green = src->Green;
|
||||
dst->Red = src->Red;
|
||||
dst->Reserved = src->Reserved;
|
||||
if (!use_alpha || src->Reserved != 0) {
|
||||
dst->Blue = src->Blue;
|
||||
dst->Green = src->Green;
|
||||
dst->Red = src->Red;
|
||||
dst->Reserved = src->Reserved;
|
||||
}
|
||||
src++;
|
||||
dst++;
|
||||
}
|
||||
|
||||
@@ -15,6 +15,8 @@
|
||||
#include <interrupt/idt.h>
|
||||
#include <interrupt/pic.h>
|
||||
#include <interrupt/pit.h>
|
||||
#include <devices/mouse.h>
|
||||
#include <devices/cursor.h>
|
||||
|
||||
extern EFI_SYSTEM_TABLE *ST;
|
||||
|
||||
@@ -146,6 +148,10 @@ extern "C" void kernel_main() {
|
||||
// 注册 IRQ 处理函数（向量 0x20 = PIC_IRQ_BASE + 0）
|
||||
idt_set_handler(PIC_IRQ_BASE + 0, irq_handler);
|
||||
|
||||
// 初始化 PS/2 鼠标驱动
|
||||
serial_write("Sylva: init mouse...\n");
|
||||
mouse_init();
|
||||
|
||||
serial_write("Sylva: init PIT...\n");
|
||||
pit_init();
|
||||
pit_set_tick_handler(scheduler_tick);
|
||||
@@ -160,6 +166,9 @@ extern "C" void kernel_main() {
|
||||
// 初始化合成器（分配后台缓冲区，注册键盘处理）
|
||||
layer_init();
|
||||
|
||||
// 初始化鼠标光标
|
||||
cursor_init();
|
||||
|
||||
// 创建桌面图层（全屏，z=0）
|
||||
layer_t* desktop = layer_create("desktop", LAYER_TYPE_DESKTOP, g_gfx.hr, g_gfx.vr);
|
||||
if (desktop) {
|
||||
|
||||
Reference in New Issue
Block a user