src/kernel/kmain.c

@@ -1,3 +1,8 @@
+// Kernel entry point
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https//github.com/xamidev/blankos
+
 #include "../libc/stdio.h"
 #include "../drivers/serial.h"
 #include "gdt.h"
@@ -7,41 +12,13 @@
 #include "../drivers/ata.h"
 #include <stdint.h>
 #include "../drivers/framebuffer.h"
-
-typedef struct {
-    uint32_t type;
-    uint32_t size;
-    uint64_t framebuffer_addr;
-    uint32_t framebuffer_pitch;
-    uint32_t framebuffer_width;
-    uint32_t framebuffer_height;
-    uint8_t framebuffer_bpp;
-    uint8_t framebuffer_type;
-    uint16_t reserved;
-} multiboot2_tag_framebuffer;
-
-typedef struct {
-    uint32_t total_size;
-    uint32_t reserved;
-    uint8_t tags[0];
-} multiboot2_info;
-
-unsigned int g_multiboot_info_address;
-
-uint32_t* framebuffer;
-int scanline;
-
-// in characters, not pixels
-uint32_t VGA_WIDTH;
-uint32_t VGA_HEIGHT;
-
+#include "kmain.h"
 
 void kmain(multiboot2_info *mb_info)
 {
-
 	multiboot2_tag_framebuffer *fb_info = NULL;
 
-uint8_t *tags = mb_info->tags;
+    uint8_t *tags = mb_info->tags;
     while (1) {
         uint32_t tag_type = *((uint32_t*) tags);
         uint32_t tag_size = *((uint32_t*) (tags + 4));
@@ -60,38 +37,23 @@ uint8_t *tags = mb_info->tags;
 	serial_printf(3, "Framebuffer Pitch: %u\r\n", fb_info->framebuffer_pitch);
 	serial_printf(3, "Framebuffer BPP: %u\r\n", fb_info->framebuffer_bpp);
 
-
     if (fb_info) {
         framebuffer = (uint32_t *)(uintptr_t) fb_info->framebuffer_addr;
 
         uint32_t width = fb_info->framebuffer_width;
         uint32_t height = fb_info->framebuffer_height;
-        //uint32_t pitch = fb_info->framebuffer_pitch;
         uint32_t bpp = fb_info->framebuffer_bpp;
 
-	
         //8x16 font, not padded 
         VGA_WIDTH = width/8;
         VGA_HEIGHT = height/16;
-
         scanline = width * (bpp/8);	
-
-	
-	/* TEST print charset
-	int y_offset = 2;
-	for (int i=0; i<512; i++)
-	{
-		if (i%(width/9)==0) y_offset++;
-		draw_char(0+i, 0+i, y_offset, white, black);
-	}
-	*/
     }
 
     printf("[kernel] multiboot2 info at 0x%x, size=%u\n", mb_info, mb_info->total_size);
     printf("[kernel] framebuffer discovered at 0x%x\n", fb_info->framebuffer_addr);
     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);
 
-
     init_serial();
     gdt_install();
     idt_install();
@@ -100,9 +62,7 @@ uint8_t *tags = mb_info->tags;
     __asm__ __volatile__("sti");
  
     //init_paging();
-
     //test_read_sector();
-
     //uint32_t *ptr = (uint32_t*)0xA0000000;
     //uint32_t do_page_fault = *ptr;
 
@@ -110,5 +70,4 @@ uint8_t *tags = mb_info->tags;
     keyboard_install();
     printf("[kernel] spawning shell...\n"); 
     shell_install();
- 
 }

src/kernel/kmain.h

@@ -0,0 +1,36 @@
+// Kernel entry point header
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https//github.com/xamidev/blankos
+
+#ifndef KMAIN_H
+#define KMAIN_H
+
+typedef struct {
+    uint32_t type;
+    uint32_t size;
+    uint64_t framebuffer_addr;
+    uint32_t framebuffer_pitch;
+    uint32_t framebuffer_width;
+    uint32_t framebuffer_height;
+    uint8_t framebuffer_bpp;
+    uint8_t framebuffer_type;
+    uint16_t reserved;
+} multiboot2_tag_framebuffer;
+
+typedef struct {
+    uint32_t total_size;
+    uint32_t reserved;
+    uint8_t tags[0];
+} multiboot2_info;
+
+unsigned int g_multiboot_info_address;
+
+uint32_t* framebuffer;
+int scanline;
+
+// in characters, not pixels
+uint32_t VGA_WIDTH;
+uint32_t VGA_HEIGHT;
+
+#endif