A20, E820h, Real Mode Emulation

1 files changed, 25 insertions, 0 deletions

diff --git a/src/loader/inc/gdt.h b/src/loader/inc/gdt.h
new file mode 100644
index 0000000..1ff20b7
--- /dev/null
+++ b/src/loader/inc/gdt.h
@@ -0,0 +1,25 @@
+// MIT License, Copyright (c) 2021 Marvin Borner
+
+#ifndef GDT_H
+#define GDT_H
+
+#include <def.h>
+
+struct gdtr {
+	u16 limit;
+	u32 ptr;
+	u32 pad;
+} PACKED;
+
+struct gdt_desc {
+	u16 limit;
+	u16 base_low;
+	u8 base_mid;
+	u8 access;
+	u8 granularity;
+	u8 base_hi;
+} PACKED;
+
+extern struct gdtr gdt;
+
+#endif