Create ata.h

implement the base ata pio mode driver so that the filesystems like fat16, fat32 work. This is the header for that. It will need a iso9660 driver for cdrom etc optical media

.clang-format

@@ -0,0 +1,24 @@
+BasedOnStyle: Google
+IndentWidth: 4
+TabWidth: 4
+UseTab: Never
+ColumnLimit: 80
+
+DerivePointerAlignment: false
+PointerAlignment: Right
+ReferenceAlignment: Right
+
+AlignConsecutiveMacros: Consecutive
+AlignTrailingComments:
+  Kind: Always
+  OverEmptyLines: 0
+
+IncludeBlocks: Regroup
+IncludeCategories:
+  # Std headers
+  - Regex: '<[[:alnum:]_.]+>'
+    Priority: 2
+
+  # Other headers
+  - Regex: '.*'
+    Priority: 1

.clangd

@@ -0,0 +1,6 @@
+CompileFlags:
+  CompilationDatabase: build
+
+Diagnostics:
+  UnusedIncludes: Strict
+  MissingIncludes: Strict

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[Makefile]
+indent_style = tab
+indent_size = 8
+tab_width = 8

Makefile

@@ -18,9 +18,9 @@ KERNEL_OBJ += $(patsubst kernel/%.asm, $(BUILD_DIR)/asm_%.o, $(KERNEL_ASM_SRC))
 KLIBC_SRC = $(wildcard klibc/src/*.c)
 KLIBC_OBJ = $(patsubst klibc/src/%.c, $(BUILD_DIR)/klibc/%.o, $(KLIBC_SRC))
 
+.PHONY: all stage1 stage2 kernel compile-commands $(BUILD_DIR)/compile_commands.json run gdb clean clean-cross clean-all
 all: $(DISK_IMG)
 
-.PHONY: stage1 stage2 kernel run gdb clean
 stage1: $(BUILD_DIR)
 	$(AS) $(ASFLAGS) -o $(BUILD_DIR)/$@.o bootloader/$@.asm
 	$(LD) -Ttext=0x7c00 -melf_i386 -o $(BUILD_DIR)/$@.elf $(BUILD_DIR)/$@.o
@@ -57,6 +57,10 @@ $(BUILD_DIR):
 	mkdir -p $@
 	mkdir -p $(BUILD_DIR)/klibc
 
+compile-commands: $(BUILD_DIR)/compile_commands.json
+$(BUILD_DIR)/compile_commands.json: $(BUILD_DIR)
+	bear --output $@ -- make -B
+
 run:
 	qemu-system-i386 -s -S $(DISK_IMG)
 

kernel/ata.h

@@ -0,0 +1,43 @@
+#ifndef ATA_H
+#define ATA_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/* ATA I/O ports */
+#define ATA_PRIMARY_IO     0x1F0
+#define ATA_PRIMARY_CTRL   0x3F6
+
+/* ATA registers */
+#define ATA_REG_DATA       0x00
+#define ATA_REG_ERROR      0x01
+#define ATA_REG_FEATURES   0x01
+#define ATA_REG_SECCOUNT0  0x02
+#define ATA_REG_LBA0       0x03
+#define ATA_REG_LBA1       0x04
+#define ATA_REG_LBA2       0x05
+#define ATA_REG_HDDEVSEL   0x06
+#define ATA_REG_COMMAND    0x07
+#define ATA_REG_STATUS     0x07
+
+/* ATA commands */
+#define ATA_CMD_READ_PIO   0x20
+#define ATA_CMD_WRITE_PIO  0x30
+#define ATA_CMD_IDENTIFY   0xEC
+
+/* Status flags */
+#define ATA_SR_BSY         0x80
+#define ATA_SR_DRDY        0x40
+#define ATA_SR_DRQ         0x08
+#define ATA_SR_ERR         0x01
+
+/* Drive select */
+#define ATA_MASTER         0x00
+#define ATA_SLAVE          0x10
+
+/* Public API */
+bool ata_init(void);
+bool ata_read_sector(uint32_t lba, uint8_t* buffer);
+bool ata_write_sector(uint32_t lba, const uint8_t* buffer);
+
+#endif

kernel/gui.c

@@ -1,66 +0,0 @@
-#include "gui.h"
-#include "vga.h"  // VGA functions for drawing and clearing screen
-#include "framebuffer.h"  // For pixel manipulation if needed
-
-// Initialize the GUI (could set up any global state or variables here)
-void gui_init(void) {
-    // Clear the screen with black or any color
-    gui_clear(vga_entry_color(VGA_COLOR_BLACK, VGA_COLOR_WHITE));
-}
-
-// Draw a window (simple rectangle with a title)
-void gui_draw_window(gui_window_t* window) {
-    // Draw the window's border
-    for (uint32_t y = 0; y < window->height; ++y) {
-        for (uint32_t x = 0; x < window->width; ++x) {
-            // Check if we are at the border
-            if (x == 0 || y == 0 || x == window->width - 1 || y == window->height - 1) {
-                vga_put_entry_at('#', vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK), window->x + x, window->y + y);
-            } else {
-                // Fill the inside of the window
-                vga_put_entry_at(' ', vga_entry_color(VGA_COLOR_BLACK, VGA_COLOR_BLACK), window->x + x, window->y + y);
-            }
-        }
-    }
-
-    // Draw the title at the top
-    if (window->title) {
-        size_t i = 0;
-        while (window->title[i] != '\0' && i < window->width - 2) {
-            vga_put_entry_at(window->title[i], vga_entry_color(VGA_COLOR_WHITE, VGA_COLOR_BLACK), window->x + i + 1, window->y);
-            i++;
-        }
-    }
-}
-
-// Draw a button (a simple rectangle with text in the middle)
-void gui_draw_button(gui_button_t* button) {
-    for (uint32_t y = 0; y < button->height; ++y) {
-        for (uint32_t x = 0; x < button->width; ++x) {
-            // Check if we are at the border
-            if (x == 0 || y == 0 || x == button->width - 1 || y == button->height - 1) {
-                vga_put_entry_at('#', vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK), button->x + x, button->y + y);
-            } else {
-                // Fill the inside of the button
-                vga_put_entry_at(' ', vga_entry_color(VGA_COLOR_BLACK, VGA_COLOR_BLACK), button->x + x, button->y + y);
-            }
-        }
-    }
-
-    // Draw the label in the center of the button
-    size_t label_len = 0;
-    while (button->label[label_len] != '\0') {
-        label_len++;
-    }
-
-    size_t start_x = button->x + (button->width - label_len) / 2;
-    size_t start_y = button->y + (button->height - 1) / 2;
-    for (size_t i = 0; i < label_len; ++i) {
-        vga_put_entry_at(button->label[i], vga_entry_color(VGA_COLOR_WHITE, VGA_COLOR_BLACK), start_x + i, start_y);
-    }
-}
-
-// Clear the screen with a color
-void gui_clear(uint32_t color) {
-    vga_clear(color);  // Just clear the VGA screen with a solid color
-}

kernel/gui.h

@@ -1,34 +0,0 @@
-#ifndef GUI_H
-#define GUI_H
-
-#include <stdint.h>
-#include <stddef.h>
-
-#define GUI_WINDOW_WIDTH   80
-#define GUI_WINDOW_HEIGHT  25
-#define GUI_BUTTON_WIDTH   10
-#define GUI_BUTTON_HEIGHT  3
-
-// Window structure
-typedef struct {
-    uint32_t x, y;
-    uint32_t width, height;
-    uint32_t color;  // Background color
-    const char* title;
-} gui_window_t;
-
-// Button structure
-typedef struct {
-    uint32_t x, y;
-    uint32_t width, height;
-    uint32_t color;  // Background color
-    const char* label;
-} gui_button_t;
-
-// Function prototypes for GUI elements
-void gui_init(void);
-void gui_draw_window(gui_window_t* window);
-void gui_draw_button(gui_button_t* button);
-void gui_clear(uint32_t color);
-
-#endif // GUI_H