26 lines
595 B
C
26 lines
595 B
C
#include <gdt.h>
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#include <stdint.h>
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#include <debug.h>
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#include <cpu.h>
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#define GDT cpu->gdt
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#define GDTP cpu->gdt_p
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void gdt_init()
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{
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cpu_t *cpu = get_cpu();
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GDT[0] = 0;
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GDT[SEG_KCODE/8] = (uint64_t)(GDT_PRESENT | GDT_CODEDATA | GDT_WRITE | GDT_EXECUTE | GDT_64BIT);
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GDT[SEG_KDATA/8] = (GDT_PRESENT | GDT_CODEDATA | GDT_WRITE);
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GDT[SEG_UCODE/8] = (GDT_PRESENT | GDT_CODEDATA | GDT_WRITE | GDT_EXECUTE | GDT_64BIT | GDT_RING3);
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GDT[SEG_UDATA/8] = (GDT_PRESENT | GDT_CODEDATA | GDT_WRITE | GDT_RING3);
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GDTP.len = 5*8-1;
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GDTP.addr = (uint64_t)&GDT[0];
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load_gdt(&GDTP);
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}
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