mirror of
https://github.com/cowmonk/cowos.git
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framebuffer driver and a working gdt
This commit is contained in:
parent
49bf45abc8
commit
4a304f7b63
9 changed files with 761 additions and 40 deletions
285
kernel/drivers/video/framebuffer.c
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285
kernel/drivers/video/framebuffer.c
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#include <drivers/video/framebuffer.h>
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#include <klibc/string.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <limine_requests.h>
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#include <drivers/video/font8x16.h>
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static fb_console_t console;
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void fb_init(void)
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{
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if (framebuffer_request.response == NULL ||
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framebuffer_request.response->framebuffer_count < 1) {
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return;
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}
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console.fb = framebuffer_request.response->framebuffers[0];
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console.fg_color = 0xFFFFFF; // White
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console.bg_color = 0x000000; // Black
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console.cursor_x = 0;
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console.cursor_y = 0;
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console.cols = console.fb->width / FB_CHAR_WIDTH;
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console.rows = console.fb->height / FB_CHAR_HEIGHT;
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fb_clear();
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}
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void fb_clear(void)
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{
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if (!console.fb) return;
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uint32_t *fb = (uint32_t *)console.fb->address;
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size_t pixels = (console.fb->pitch / 4) * console.fb->height;
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for (size_t i = 0; i < pixels; i++) {
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fb[i] = console.bg_color;
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}
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console.cursor_x = 0;
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console.cursor_y = 0;
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}
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void fb_draw_rect(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t color)
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{
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if (!console.fb) return;
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uint32_t *fb = (uint32_t *)console.fb->address;
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uint32_t pitch_pixels = console.fb->pitch / 4;
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for (uint32_t row = y; row < y + h && row < console.fb->height; row++) {
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for (uint32_t col = x; col < x + w && col < console.fb->width; col++) {
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fb[row * pitch_pixels + col] = color;
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}
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}
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}
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void fb_set_color(uint32_t fg, uint32_t bg)
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{
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console.fg_color = fg;
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console.bg_color = bg;
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}
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static void draw_char(uint32_t x, uint32_t y, char c, uint32_t fg_color, uint32_t bg_color)
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{
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if (!console.fb) return;
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uint32_t *fb = (uint32_t *)console.fb->address;
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uint32_t pitch_pixels = console.fb->pitch / 4;
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// Get the font data for this character
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const uint8_t *char_data = &IBM_VGA_8x16[c * 16];
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// Draw each row of the character
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for (uint32_t row = 0; row < FB_CHAR_HEIGHT; row++) {
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uint8_t font_row = char_data[row];
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// Draw each pixel in the row
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for (uint32_t col = 0; col < FB_CHAR_WIDTH; col++) {
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uint32_t px = x + col;
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uint32_t py = y + row;
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// Check bounds
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if (px >= console.fb->width || py >= console.fb->height) continue;
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// Check if this pixel should be set (bit test)
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if (font_row & (0x80 >> col)) {
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fb[py * pitch_pixels + px] = fg_color;
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} else {
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fb[py * pitch_pixels + px] = bg_color;
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}
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}
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}
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}
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static void scroll_up(void)
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{
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if (!console.fb) return;
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uint32_t *fb = (uint32_t *)console.fb->address;
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uint32_t pitch_pixels = console.fb->pitch / 4;
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// Move all lines up by one character height
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for (uint32_t y = 0; y < console.fb->height - FB_CHAR_HEIGHT; y++) {
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for (uint32_t x = 0; x < console.fb->width; x++) {
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fb[y * pitch_pixels + x] = fb[(y + FB_CHAR_HEIGHT) * pitch_pixels + x];
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}
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}
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// Clear the last line
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for (uint32_t y = console.fb->height - FB_CHAR_HEIGHT; y < console.fb->height; y++) {
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for (uint32_t x = 0; x < console.fb->width; x++) {
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fb[y * pitch_pixels + x] = console.bg_color;
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}
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}
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}
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void fb_putchar(char c)
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{
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if (!console.fb) return;
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// Handle special characters
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switch (c) {
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case '\n':
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console.cursor_x = 0;
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console.cursor_y++;
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break;
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case '\r':
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console.cursor_x = 0;
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break;
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case '\t':
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console.cursor_x = (console.cursor_x + 8) & ~7;
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break;
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case '\b':
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if (console.cursor_x > 0) {
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console.cursor_x--;
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draw_char(console.cursor_x * FB_CHAR_WIDTH,
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console.cursor_y * FB_CHAR_HEIGHT,
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' ', console.fg_color, console.bg_color);
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}
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break;
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default:
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// Draw the character
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draw_char(console.cursor_x * FB_CHAR_WIDTH,
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console.cursor_y * FB_CHAR_HEIGHT,
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c, console.fg_color, console.bg_color);
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console.cursor_x++;
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break;
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}
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// Handle line wrapping
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if (console.cursor_x >= console.cols) {
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console.cursor_x = 0;
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console.cursor_y++;
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}
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// Handle scrolling
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if (console.cursor_y >= console.rows) {
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scroll_up();
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console.cursor_y = console.rows - 1;
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}
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}
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void fb_puts(const char *str)
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{
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while (*str) {
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fb_putchar(*str++);
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}
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}
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static void print_number(unsigned long num, int base, int width, char pad)
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{
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char digits[] = "0123456789ABCDEF";
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char buffer[32];
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int pos = 0;
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// Convert number to string (reversed)
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if (num == 0) {
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buffer[pos++] = '0';
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} else {
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while (num > 0) {
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buffer[pos++] = digits[num % base];
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num /= base;
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}
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}
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// Add padding if needed
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while (pos < width) {
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buffer[pos++] = pad;
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}
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// Print reversed
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while (pos > 0) {
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fb_putchar(buffer[--pos]);
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}
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}
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static void print_signed(long num, int width, char pad)
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{
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if (num < 0) {
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fb_putchar('-');
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print_number(-num, 10, width, pad);
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} else {
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print_number(num, 10, width, pad);
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}
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}
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void fb_printf(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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while (*fmt) {
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if (*fmt == '%') {
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fmt++;
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// Handle width and padding
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char pad = ' ';
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int width = 0;
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if (*fmt == '0') {
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pad = '0';
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fmt++;
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}
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while (*fmt >= '0' && *fmt <= '9') {
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width = width * 10 + (*fmt - '0');
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fmt++;
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}
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// Handle format specifiers
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switch (*fmt) {
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case 'd':
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case 'i':
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print_signed(va_arg(args, int), width, pad);
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break;
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case 'u':
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print_number(va_arg(args, unsigned int), 10, width, pad);
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break;
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case 'x':
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print_number(va_arg(args, unsigned int), 16, width, pad);
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break;
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case 'X':
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print_number(va_arg(args, unsigned int), 16, width, pad);
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break;
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case 'p':
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fb_puts("0x");
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print_number((unsigned long)va_arg(args, void*), 16, 16, '0');
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break;
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case 'c':
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fb_putchar(va_arg(args, int));
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break;
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case 's':
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{
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const char *str = va_arg(args, const char*);
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if (str) {
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fb_puts(str);
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} else {
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fb_puts("(null)");
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}
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}
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break;
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case '%':
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fb_putchar('%');
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break;
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default:
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fb_putchar('%');
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fb_putchar(*fmt);
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break;
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}
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} else {
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fb_putchar(*fmt);
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}
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fmt++;
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}
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va_end(args);
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}
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@ -3,19 +3,7 @@
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#include "limine.h"
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__attribute__((used, section(".limine_requests")))
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static volatile LIMINE_BASE_REVISION(3);
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__attribute__((used, section(".limine_requests")))
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static volatile struct limine_framebuffer_request framebuffer_request = {
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.id = LIMINE_FRAMEBUFFER_REQUEST,
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.revision = 0
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};
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__attribute__((used, section(".limine_requests_start")))
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static volatile LIMINE_REQUESTS_START_MARKER
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__attribute__((used, section(".limine_requests_end")))
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static volatile LIMINE_REQUESTS_END_MARKER;
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#define DEFINE_LIMINE_REQUESTS
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#include "limine_requests.h"
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#endif /* BOOTLOADER_H */
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265
kernel/include/drivers/video/font8x16.h
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265
kernel/include/drivers/video/font8x16.h
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/*
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* file './font-bin/IBM_VGA_8x16.bin', filesize 4096bytes, linewidth=16bytes
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* array created from bin-file by bin2header
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* bin2header (c) 2013 Nils Stec, <nils.stec@gmail.com>
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*
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*/
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uint8_t IBM_VGA_8x16[4096] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x7e, 0x81, 0xa5, 0x81, 0x81, 0xbd, 0x99, 0x81, 0x81, 0x7e, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x7e, 0xff, 0xdb, 0xff, 0xff, 0xc3, 0xe7, 0xff, 0xff, 0x7e, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x6c, 0xfe, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x10, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x18, 0x3c, 0x3c, 0xe7, 0xe7, 0xe7, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0x7e, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x66, 0x42, 0x42, 0x66, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xc3, 0x99, 0xbd, 0xbd, 0x99, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff,
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0x00, 0x00, 0x1e, 0x0e, 0x1a, 0x32, 0x78, 0xcc, 0xcc, 0xcc, 0xcc, 0x78, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x3c, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x3f, 0x33, 0x3f, 0x30, 0x30, 0x30, 0x30, 0x70, 0xf0, 0xe0, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x7f, 0x63, 0x7f, 0x63, 0x63, 0x63, 0x63, 0x67, 0xe7, 0xe6, 0xc0, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x18, 0x18, 0xdb, 0x3c, 0xe7, 0x3c, 0xdb, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfe, 0xf8, 0xf0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x02, 0x06, 0x0e, 0x1e, 0x3e, 0xfe, 0x3e, 0x1e, 0x0e, 0x06, 0x02, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x66, 0x66, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x7f, 0xdb, 0xdb, 0xdb, 0x7b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x7c, 0xc6, 0x60, 0x38, 0x6c, 0xc6, 0xc6, 0x6c, 0x38, 0x0c, 0xc6, 0x7c, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe, 0xfe, 0xfe, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x7e, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x0c, 0xfe, 0x0c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x60, 0xfe, 0x60, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0x6c, 0xfe, 0x6c, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x10, 0x38, 0x38, 0x7c, 0x7c, 0xfe, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe, 0x7c, 0x7c, 0x38, 0x38, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x18, 0x3c, 0x3c, 0x3c, 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x66, 0x66, 0x66, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x6c, 0x6c, 0xfe, 0x6c, 0x6c, 0x6c, 0xfe, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00,
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0x18, 0x18, 0x7c, 0xc6, 0xc2, 0xc0, 0x7c, 0x06, 0x06, 0x86, 0xc6, 0x7c, 0x18, 0x18, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0xc2, 0xc6, 0x0c, 0x18, 0x30, 0x60, 0xc6, 0x86, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x38, 0x6c, 0x6c, 0x38, 0x76, 0xdc, 0xcc, 0xcc, 0xcc, 0x76, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x30, 0x30, 0x30, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x0c, 0x18, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x18, 0x0c, 0x00, 0x00, 0x00, 0x00,
|
||||
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|
||||
0x00, 0x30, 0x78, 0xcc, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x76, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x60, 0x30, 0x18, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x76, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0xc6, 0x00, 0x00, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7e, 0x06, 0x0c, 0x78, 0x00,
|
||||
0x00, 0xc6, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0xc6, 0x00, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x18, 0x18, 0x3c, 0x66, 0x60, 0x60, 0x60, 0x66, 0x3c, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x38, 0x6c, 0x64, 0x60, 0xf0, 0x60, 0x60, 0x60, 0x60, 0xe6, 0xfc, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18, 0x7e, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0xf8, 0xcc, 0xcc, 0xf8, 0xc4, 0xcc, 0xde, 0xcc, 0xcc, 0xcc, 0xc6, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x0e, 0x1b, 0x18, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0xd8, 0x70, 0x00, 0x00,
|
||||
0x00, 0x18, 0x30, 0x60, 0x00, 0x78, 0x0c, 0x7c, 0xcc, 0xcc, 0xcc, 0x76, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x0c, 0x18, 0x30, 0x00, 0x38, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x18, 0x30, 0x60, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x18, 0x30, 0x60, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x76, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x76, 0xdc, 0x00, 0xdc, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00, 0x00,
|
||||
0x76, 0xdc, 0x00, 0xc6, 0xe6, 0xf6, 0xfe, 0xde, 0xce, 0xc6, 0xc6, 0xc6, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x3c, 0x6c, 0x6c, 0x3e, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x38, 0x6c, 0x6c, 0x38, 0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x30, 0x30, 0x00, 0x30, 0x30, 0x60, 0xc0, 0xc6, 0xc6, 0x7c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xc0, 0xc0, 0xc0, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x06, 0x06, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0xc0, 0xc0, 0xc2, 0xc6, 0xcc, 0x18, 0x30, 0x60, 0xdc, 0x86, 0x0c, 0x18, 0x3e, 0x00, 0x00,
|
||||
0x00, 0xc0, 0xc0, 0xc2, 0xc6, 0xcc, 0x18, 0x30, 0x66, 0xce, 0x9e, 0x3e, 0x06, 0x06, 0x00, 0x00,
|
||||
0x00, 0x00, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x3c, 0x3c, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x6c, 0xd8, 0x6c, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0xd8, 0x6c, 0x36, 0x6c, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x11, 0x44, 0x11, 0x44, 0x11, 0x44, 0x11, 0x44, 0x11, 0x44, 0x11, 0x44, 0x11, 0x44, 0x11, 0x44,
|
||||
0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa,
|
||||
0xdd, 0x77, 0xdd, 0x77, 0xdd, 0x77, 0xdd, 0x77, 0xdd, 0x77, 0xdd, 0x77, 0xdd, 0x77, 0xdd, 0x77,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xf8, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0xf8, 0x18, 0xf8, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0xf6, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x18, 0xf8, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0xf6, 0x06, 0xf6, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x06, 0xf6, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0xf6, 0x06, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0xf8, 0x18, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1f, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x1f, 0x18, 0x1f, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x37, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x37, 0x30, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x30, 0x37, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0xf7, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xf7, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x37, 0x30, 0x37, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0xf7, 0x00, 0xf7, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x1f, 0x18, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x18, 0x1f, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0xff, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0x18, 0xff, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||||
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0,
|
||||
0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
|
||||
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x76, 0xdc, 0xd8, 0xd8, 0xd8, 0xdc, 0x76, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x78, 0xcc, 0xcc, 0xcc, 0xd8, 0xcc, 0xc6, 0xc6, 0xc6, 0xcc, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0xfe, 0xc6, 0xc6, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0xfe, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0xfe, 0xc6, 0x60, 0x30, 0x18, 0x30, 0x60, 0xc6, 0xfe, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xd8, 0xd8, 0xd8, 0xd8, 0xd8, 0x70, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x66, 0x7c, 0x60, 0x60, 0xc0, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x76, 0xdc, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x7e, 0x18, 0x3c, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x38, 0x6c, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0x6c, 0x38, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x38, 0x6c, 0xc6, 0xc6, 0xc6, 0x6c, 0x6c, 0x6c, 0x6c, 0xee, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x1e, 0x30, 0x18, 0x0c, 0x3e, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xdb, 0xdb, 0xdb, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x03, 0x06, 0x7e, 0xdb, 0xdb, 0xf3, 0x7e, 0x60, 0xc0, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x1c, 0x30, 0x60, 0x60, 0x7c, 0x60, 0x60, 0x60, 0x30, 0x1c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x30, 0x18, 0x0c, 0x06, 0x0c, 0x18, 0x30, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x0c, 0x18, 0x30, 0x60, 0x30, 0x18, 0x0c, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x0e, 0x1b, 0x1b, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
|
||||
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xd8, 0xd8, 0xd8, 0x70, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x7e, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x76, 0xdc, 0x00, 0x76, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x38, 0x6c, 0x6c, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x0f, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0xec, 0x6c, 0x6c, 0x3c, 0x1c, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0xd8, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x70, 0xd8, 0x30, 0x60, 0xc8, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
};
|
||||
29
kernel/include/drivers/video/framebuffer.h
Normal file
29
kernel/include/drivers/video/framebuffer.h
Normal file
|
|
@ -0,0 +1,29 @@
|
|||
#ifndef FRAMEBUFFER_H
|
||||
#define FRAMEBUFFER_H
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stddef.h>
|
||||
#include <limine.h>
|
||||
|
||||
#define FB_CHAR_WIDTH 8
|
||||
#define FB_CHAR_HEIGHT 16
|
||||
|
||||
typedef struct {
|
||||
uint32_t fg_color;
|
||||
uint32_t bg_color;
|
||||
uint32_t cursor_x;
|
||||
uint32_t cursor_y;
|
||||
uint32_t cols;
|
||||
uint32_t rows;
|
||||
struct limine_framebuffer *fb;
|
||||
} fb_console_t;
|
||||
|
||||
void fb_init(void);
|
||||
void fb_putchar(char c);
|
||||
void fb_puts(const char *str);
|
||||
void fb_clear(void);
|
||||
void fb_set_color(uint32_t fg, uint32_t bg);
|
||||
void fb_printf(const char *fmt, ...);
|
||||
void fb_draw_rect(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t color);
|
||||
|
||||
#endif /* FRAMEBUFFER_H */
|
||||
|
|
@ -4,12 +4,12 @@
|
|||
#define GDT_H
|
||||
|
||||
typedef struct GDTEntry {
|
||||
uint16_t limit;
|
||||
uint16_t limit_low;
|
||||
uint16_t base_low;
|
||||
uint16_t base_mid;
|
||||
uint8_t base_high;
|
||||
uint8_t base_mid;
|
||||
uint8_t access;
|
||||
uint8_t granularity;
|
||||
uint8_t limit_high_and_flags;
|
||||
uint8_t base_high;
|
||||
} __attribute__((packed)) GDTEntry;
|
||||
|
||||
typedef struct GDTPtr {
|
||||
|
|
@ -17,7 +17,7 @@ typedef struct GDTPtr {
|
|||
uint64_t base;
|
||||
} __attribute__((packed)) GDTPtr;
|
||||
|
||||
#define GDT_NUM_ENTRIES 5 /* including null descriptor */
|
||||
#define GDT_NUM_ENTRIES 5 // Incl. null descriptor
|
||||
#define GDT_KERNEL_CODE 0x08
|
||||
#define GDT_KERNEL_DATA 0x10
|
||||
#define GDT_USER_CODE 0x18
|
||||
|
|
|
|||
31
kernel/include/limine_requests.h
Normal file
31
kernel/include/limine_requests.h
Normal file
|
|
@ -0,0 +1,31 @@
|
|||
#ifndef LIMINE_REQUESTS_H
|
||||
#define LIMINE_REQUESTS_H
|
||||
|
||||
#include "limine.h"
|
||||
|
||||
// Only define once to avoid duplicates (result: kernel panic)
|
||||
#ifdef DEFINE_LIMINE_REQUESTS
|
||||
|
||||
__attribute__((used, section(".limine_requests")))
|
||||
volatile LIMINE_BASE_REVISION(3);
|
||||
|
||||
__attribute__((used, section(".limine_requests")))
|
||||
volatile struct limine_framebuffer_request framebuffer_request = {
|
||||
.id = LIMINE_FRAMEBUFFER_REQUEST,
|
||||
.revision = 0
|
||||
};
|
||||
|
||||
__attribute__((used, section(".limine_requests_start")))
|
||||
volatile LIMINE_REQUESTS_START_MARKER
|
||||
|
||||
__attribute__((used, section(".limine_requests_end")))
|
||||
volatile LIMINE_REQUESTS_END_MARKER;
|
||||
|
||||
#else
|
||||
|
||||
// External declaration for other files
|
||||
extern volatile struct limine_framebuffer_request framebuffer_request;
|
||||
|
||||
#endif
|
||||
|
||||
#endif // LIMINE_REQUESTS_H
|
||||
|
|
@ -1,8 +1,8 @@
|
|||
#include <gdt.h>
|
||||
#include <klibc/string.h>
|
||||
#include <drivers/video/vga.h>
|
||||
#include <stddef.h>
|
||||
#include <bootloader.h>
|
||||
#include <drivers/video/framebuffer.h>
|
||||
|
||||
static void
|
||||
hcf(void)
|
||||
|
|
@ -18,9 +18,13 @@ kernel_main(void)
|
|||
/* Make sure the bootloader understands our base revision */
|
||||
if (LIMINE_BASE_REVISION_SUPPORTED == 0) hcf();
|
||||
|
||||
vga_set_mode_13h();
|
||||
/* Initialize framebuffer console */
|
||||
fb_init();
|
||||
|
||||
/* initGDT(); */
|
||||
/* Test print */
|
||||
fb_puts("Hello World\n");
|
||||
|
||||
initGDT();
|
||||
|
||||
/* done so now hang */
|
||||
hcf();
|
||||
|
|
|
|||
119
kernel/mm/paging.stub
Normal file
119
kernel/mm/paging.stub
Normal file
|
|
@ -0,0 +1,119 @@
|
|||
#include <stdint.h>
|
||||
#include <stddef.h>
|
||||
#include <limine.h>
|
||||
|
||||
#define PAGE_PRESENT (1ULL << 0)
|
||||
#define PAGE_WRITABLE (1ULL << 1)
|
||||
#define PAGE_USER (1ULL << 2)
|
||||
#define PAGE_SIZE_2MB (1ULL << 7)
|
||||
#define PAGE_SIZE 4096
|
||||
|
||||
// Get hhdm offset
|
||||
extern volatile struct limine_hhdm_request hhdm_request;
|
||||
extern volatile struct limine_kernel_address_request kernel_address_request;
|
||||
|
||||
// Static storage for page tables
|
||||
static uint64_t pdpt[512] __attribute__((aligned(4096)));
|
||||
static uint64_t pd[512] __attribute__((aligned(4096)));
|
||||
|
||||
// Get current cr3 value (PML address)
|
||||
static uint64_t get_cr3(void)
|
||||
{
|
||||
uint64_t cr3;
|
||||
__asm__ volatile("mov %%cr3, %0" : "=r"(cr3));
|
||||
return cr3;
|
||||
}
|
||||
|
||||
// Set cr3 to flush TLB
|
||||
static void set_cr3(uint64_t cr3)
|
||||
{
|
||||
__asm__ volatile("mov %0, %%cr3" : : "r"(cr3) : "memory");
|
||||
}
|
||||
|
||||
// Convert physical address to virt address using hhdm
|
||||
static inline void *phys_to_virt(uint64_t phys)
|
||||
{
|
||||
if (hhdm_request.response == NULL) {
|
||||
// Fallback if hhdm is not available
|
||||
return (void *)(phys + 0xffff800000000000ULL);
|
||||
}
|
||||
return (void *)(phys + hhdm_request.response->offset);
|
||||
}
|
||||
|
||||
// Convert virt address to physical address
|
||||
static inline uint64_t virt_to_phys(void *virt)
|
||||
{
|
||||
uint64_t addr = (uint64_t)virt;
|
||||
|
||||
// Check if this is a kernel address
|
||||
if (kernel_address_request.response != NULL) {
|
||||
uint64_t kernel_virt_base = kernel_address_request.response->virtual_base;
|
||||
uint64_t kernel_phys_base = kernel_address_request.response->physical_base;
|
||||
|
||||
// If address is in kernel space, convert using kernel base
|
||||
if (addr >= kernel_virt_base && addr < kernel_virt_base + 0x200000) {
|
||||
return kernel_phys_base + (addr - kernel_virt_base);
|
||||
}
|
||||
}
|
||||
|
||||
// Otherwise, in hhdm range
|
||||
if (hhdm_request.response == NULL) {
|
||||
// Fallback to default if hhdm not avail
|
||||
return (addr - 0xffff800000000000ULL);
|
||||
}
|
||||
return (addr - hhdm_request.response->offset);
|
||||
}
|
||||
|
||||
void map_vga_memory(void)
|
||||
{
|
||||
// Get current PML4 from cr3
|
||||
uint64_t cr3 = get_cr3();
|
||||
uint64_t *pml4 = (uint64_t *)phys_to_virt(cr3 & ~0xFFF);
|
||||
|
||||
// VGA memory starts at 0xA0000 (640KB)
|
||||
// Map entire lower 1MB region for simplcity
|
||||
|
||||
/* For address 0xA0000:
|
||||
* PML4 index = 0 (bits 47-39)
|
||||
* PDPT index = 0 (bits 38-30)
|
||||
* PD index = 0 (bits 29-21)
|
||||
* PT index = 160 (0xA0) (bits 20-12)
|
||||
*/
|
||||
|
||||
// Check if PML4[0] is present
|
||||
if (!(pml4[0] & PAGE_PRESENT)) {
|
||||
// Clear PDPT
|
||||
for (int i = 0; i < 512; i++) {
|
||||
pdpt[i] = 0;
|
||||
}
|
||||
// Install PDPT (use physical address)
|
||||
pml4[0] = virt_to_phys(pdpt) | PAGE_PRESENT | PAGE_WRITABLE | PAGE_USER;
|
||||
}
|
||||
|
||||
// Get PDPT (convert physical address from entry to virt for access)
|
||||
uint64_t *pdpt_ptr = (uint64_t *)phys_to_virt(pml4[0] & ~0xFFF);
|
||||
|
||||
// Check if PDPT[0] is present
|
||||
if (!(pdpt_ptr[0] & PAGE_PRESENT)) {
|
||||
// Clear pd
|
||||
for (int i = 0; i < 512; i++) {
|
||||
pd[i] = 0;
|
||||
}
|
||||
// Install pd (use physical address)
|
||||
pdpt_ptr[0] = virt_to_phys(pd) | PAGE_PRESENT | PAGE_WRITABLE | PAGE_USER;
|
||||
}
|
||||
|
||||
// Get pd (convert physical address from entry to virt for access)
|
||||
uint64_t *pd_ptr = (uint64_t *)phys_to_virt(pdpt_ptr[0] & ~0xFFF);
|
||||
|
||||
// Check if we can use 2MB pages
|
||||
if (!(pd_ptr[0] & PAGE_PRESENT)) {
|
||||
// Map the first 2MB as a large page (0x0 - 0x200000)
|
||||
// This include VGA memory at 0xA0000-0xBFFFF
|
||||
pd_ptr[0] = 0x0 | PAGE_PRESENT | PAGE_WRITABLE | PAGE_USER | PAGE_SIZE_2MB;
|
||||
}
|
||||
|
||||
// Flush TLB
|
||||
set_cr3(cr3);
|
||||
|
||||
}
|
||||
|
|
@ -7,12 +7,12 @@ void
|
|||
gdt_reload()
|
||||
{
|
||||
asm volatile("lgdt %0\n\t"
|
||||
"push $0x28\n\t"
|
||||
"push $0x08\n\t"
|
||||
"lea 1f(%%rip), %%rax\n\t"
|
||||
"push %%rax\n\t"
|
||||
"lretq\n\t"
|
||||
"1:\n\t"
|
||||
"mov $0x30, %%eax\n\t"
|
||||
"mov $0x10, %%eax\n\t"
|
||||
"mov %%eax, %%ds\n\t"
|
||||
"mov %%eax, %%es\n\t"
|
||||
"mov %%eax, %%fs\n\t"
|
||||
|
|
@ -26,44 +26,44 @@ gdt_reload()
|
|||
void
|
||||
initGDT()
|
||||
{
|
||||
/* null descriptor (0) */
|
||||
descriptors[0].limit = 0;
|
||||
// null descriptor (0)
|
||||
descriptors[0].limit_low = 0;
|
||||
descriptors[0].base_low = 0;
|
||||
descriptors[0].base_mid = 0;
|
||||
descriptors[0].access = 0;
|
||||
descriptors[0].granularity = 0;
|
||||
descriptors[0].limit_high_and_flags = 0;
|
||||
descriptors[0].base_high = 0;
|
||||
|
||||
/* kernel code 64 (40) */
|
||||
descriptors[1].limit = 0;
|
||||
// kernel code 64 (40)
|
||||
descriptors[1].limit_low = 0;
|
||||
descriptors[1].base_low = 0;
|
||||
descriptors[1].base_mid = 0;
|
||||
descriptors[1].access = 0b10011010;
|
||||
descriptors[1].granularity = 0b00100000;
|
||||
descriptors[1].limit_high_and_flags = 0b00101000;
|
||||
descriptors[1].base_high = 0;
|
||||
|
||||
/* kernel data 64 (48) */
|
||||
descriptors[2].limit = 0;
|
||||
// kernel data 64 (48)
|
||||
descriptors[2].limit_low = 0;
|
||||
descriptors[2].base_low = 0;
|
||||
descriptors[2].base_mid = 0;
|
||||
descriptors[2].access = 0b10010010;
|
||||
descriptors[2].granularity = 0;
|
||||
descriptors[2].limit_high_and_flags = 0;
|
||||
descriptors[2].base_high = 0;
|
||||
|
||||
// user code 64 (72)
|
||||
descriptors[3].limit = 0;
|
||||
descriptors[3].limit_low = 0;
|
||||
descriptors[3].base_low = 0;
|
||||
descriptors[3].base_mid = 0;
|
||||
descriptors[3].access = 0b11111010;
|
||||
descriptors[3].granularity = 0b00100000;
|
||||
descriptors[3].limit_high_and_flags = 0b00101000;
|
||||
descriptors[3].base_high = 0;
|
||||
|
||||
// user data 64. (80)
|
||||
descriptors[4].limit = 0;
|
||||
descriptors[4].limit_low = 0;
|
||||
descriptors[4].base_low = 0;
|
||||
descriptors[4].base_mid = 0;
|
||||
descriptors[4].access = 0b11110010;
|
||||
descriptors[4].granularity = 0;
|
||||
descriptors[4].limit_high_and_flags = 0;
|
||||
descriptors[4].base_high = 0;
|
||||
|
||||
gdtptr.limit = sizeof(descriptors) - 1;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue