24 lines
691 B
C
24 lines
691 B
C
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#ifndef _GDT_H
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#define _GDT_H
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#include <stdint.h>
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struct gdt_entry {
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uint16_t limit_low; /* Lower 16 bits of limit */
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uint16_t base_low; /* Lower 16 bits of base */
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uint8_t base_middle; /* Next 8 bits of base */
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uint8_t access; /* Access flags */
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uint8_t granularity; /* Granularity + high 4 bits of limit */
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uint8_t base_high; /* Last 8 bits of base */
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} __attribute__((packed));
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struct gdt_ptr {
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uint16_t limit; /* Size of GDT - 1 */
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uint32_t base; /* Base address of GDT */
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} __attribute__((packed));
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void gdt_install();
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void gdt_set_entry(int num, uint32_t base, uint32_t limit, uint8_t access, uint8_t gran);
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#endif
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