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48 lines
979 B
C
48 lines
979 B
C
#ifndef _ARCH_X86_64_GDT_H
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#define _ARCH_X86_64_GDT_H
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#include <stdint.h>
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#define GDT_KERNEL_CODE 0x08
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#define GDT_KERNEL_DATA 0x10
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#define GDT_USER_CODE 0x18
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#define GDT_USER_DATA 0x20
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#define GDT_TSS 0x28
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typedef struct {
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uint16_t limit_low;
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uint16_t base_low;
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uint8_t base_middle;
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uint8_t access;
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uint8_t granularity;
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uint8_t base_high;
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} __attribute__((packed)) gdt_entry_t;
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typedef struct {
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uint16_t limit;
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uint64_t base;
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} __attribute__((packed)) gdt_ptr_t;
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typedef struct {
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uint32_t reserved0;
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uint64_t rsp0;
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uint64_t rsp1;
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uint64_t rsp2;
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uint64_t reserved1;
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uint64_t ist1;
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uint64_t ist2;
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uint64_t ist3;
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uint64_t ist4;
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uint64_t ist5;
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uint64_t ist6;
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uint64_t ist7;
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uint64_t reserved2;
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uint16_t reserved3;
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uint16_t iomap_base;
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} __attribute__((packed)) tss_entry_t;
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void gdt_init(void);
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void gdt_set_kernel_stack(uint64_t stack);
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#endif // _ARCH_X86_64_GDT_H
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