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Checking multiboot stuff oh yah

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This commit is contained in:
Lauren Toivanen 2023-06-14 05:13:21 +03:00
parent 99e0b4debb
commit 663a6317c4
Signed by: jt
GPG key ID: 9151B109B73ECAD5
3 changed files with 307 additions and 6 deletions
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34
kernel.c
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@ -1,10 +1,11 @@
#include "multiboot.h"
#include "vga.h"
// static inline void outb(unsigned int port, unsigned char val) {
// asm volatile ("outb %0, %1" : : "a"(val), "Nd"(port) : "memory");
// }
void kmain (void) {
void kmain (unsigned int mbootmagick, multiboot_info_t* mbootinfo) {
// Cursor disabling
// TODO: outb function
@ -15,8 +16,31 @@ void kmain (void) {
vga_init(VGA_COLOR_GREY, VGA_COLOR_BLACK);
vga_write_line("=== KoalemOS ===");
vga_write("Testing color writing... ");
vga_write_color("Yes", VGA_COLOR_BLACK, VGA_COLOR_GREEN);
vga_write_color("No", VGA_COLOR_BLACK, VGA_COLOR_RED);
vga_write_line("Execution finished. Halting CPU...");
vga_write("Checking multiboot loader: ");
// Check multiboot header
if (mbootmagick != MULTIBOOT_BOOTLOADER_MAGIC) {
vga_write_color("INVALID MAGIC", VGA_COLOR_BLACK, VGA_COLOR_RED);
return;
}
vga_write(mbootinfo->boot_loader_name);
// Check videomode
vga_write("\nVideomode: ");
switch (mbootinfo->vbe_mode) {
case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
vga_write("Indexed");
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
vga_write("RGB");
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
vga_write("EGA TEXT");
break;
default:
vga_write_color("UNKNOWN", VGA_COLOR_BLACK, VGA_COLOR_RED);
return;
}
vga_write_line("\nExecution finished, halting...");
}