33 lines
625 B
C
33 lines
625 B
C
#ifndef GDT_H
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#define GDT_H
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#include "types.h"
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#define NO_GDT_ENTRIES 5
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struct GDT_Entry {
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u16 low_limit;
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u16 low_base;
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u8 middle_base;
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u8 access;
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u8 granular;
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u8 high_base;
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}__attribute__((packed));
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// Contains the pointer to the first gdt entry as well as the size(of the whole table(?))
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struct GDT_PTR {
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u16 size;
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u32 address;
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}__attribute__((packed));
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struct GDT_Entry gdt_entries[NO_GDT_ENTRIES];
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struct GDT_PTR gdt_ptr;
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// this func is actually taken care of in gdt_seg.s
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extern void load_gdt();
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void gdt_configure_entry(u32 entry, u32 base, u32 limit, u8 access, u8 gran);
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void gdt_configure();
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#endif
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