115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
#include "../libc/stdio.h"
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#include "../drivers/serial.h"
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#include "gdt.h"
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#include "idt.h"
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#include "system.h"
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#include "paging.h"
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#include "../drivers/ata.h"
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#include <stdint.h>
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#include "../drivers/framebuffer.h"
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typedef struct {
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uint32_t type;
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uint32_t size;
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uint64_t framebuffer_addr;
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uint32_t framebuffer_pitch;
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uint32_t framebuffer_width;
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uint32_t framebuffer_height;
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uint8_t framebuffer_bpp;
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uint8_t framebuffer_type;
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uint16_t reserved;
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} multiboot2_tag_framebuffer;
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typedef struct {
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uint32_t total_size;
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uint32_t reserved;
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uint8_t tags[0];
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} multiboot2_info;
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unsigned int g_multiboot_info_address;
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uint32_t* framebuffer;
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int scanline;
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// in characters, not pixels
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uint32_t VGA_WIDTH;
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uint32_t VGA_HEIGHT;
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void kmain(multiboot2_info *mb_info)
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{
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multiboot2_tag_framebuffer *fb_info = NULL;
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uint8_t *tags = mb_info->tags;
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while (1) {
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uint32_t tag_type = *((uint32_t*) tags);
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uint32_t tag_size = *((uint32_t*) (tags + 4));
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if (tag_type == 0) break;
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if (tag_type == 8) {
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fb_info = (multiboot2_tag_framebuffer*) tags;
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}
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tags += ((tag_size + 7) & ~7);
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}
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serial_printf(3, "Framebuffer Address: 0x%x\r", fb_info->framebuffer_addr);
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serial_printf(3, "Framebuffer Width: %u\r\n", fb_info->framebuffer_width);
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serial_printf(3, "Framebuffer Height: %u\r\n", fb_info->framebuffer_height);
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serial_printf(3, "Framebuffer Pitch: %u\r\n", fb_info->framebuffer_pitch);
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serial_printf(3, "Framebuffer BPP: %u\r\n", fb_info->framebuffer_bpp);
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if (fb_info) {
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framebuffer = (uint32_t *)(uintptr_t) fb_info->framebuffer_addr;
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uint32_t width = fb_info->framebuffer_width;
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uint32_t height = fb_info->framebuffer_height;
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//uint32_t pitch = fb_info->framebuffer_pitch;
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uint32_t bpp = fb_info->framebuffer_bpp;
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//8x16 font, not padded
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VGA_WIDTH = width/8;
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VGA_HEIGHT = height/16;
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scanline = width * (bpp/8);
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/* TEST print charset
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int y_offset = 2;
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for (int i=0; i<512; i++)
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{
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if (i%(width/9)==0) y_offset++;
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draw_char(0+i, 0+i, y_offset, white, black);
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}
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*/
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}
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printf("[kernel] multiboot2 info at 0x%x, size=%u\n", mb_info, mb_info->total_size);
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printf("[kernel] framebuffer discovered at 0x%x\n", fb_info->framebuffer_addr);
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printf("[kernel] fb0: width=%u, height=%u, pitch=%u, bpp=%u\n", fb_info->framebuffer_width, fb_info->framebuffer_height, fb_info->framebuffer_pitch, fb_info->framebuffer_bpp);
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init_serial();
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gdt_install();
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idt_install();
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isr_install();
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irq_install();
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__asm__ __volatile__("sti");
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//init_paging();
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//test_read_sector();
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//uint32_t *ptr = (uint32_t*)0xA0000000;
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//uint32_t do_page_fault = *ptr;
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timer_install();
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keyboard_install();
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printf("[kernel] spawning shell...\n");
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shell_install();
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}
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