45 lines
866 B
C
45 lines
866 B
C
#include "idt.h"
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#include "system.h"
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#include "../libc/stdio.h"
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struct idt_entry
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{
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unsigned short base_lo;
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unsigned short sel;
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unsigned char always0;
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unsigned char flags;
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unsigned short base_hi;
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} __attribute__((packed));
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struct idt_ptr
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{
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unsigned short limit;
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unsigned int base;
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} __attribute__((packed));
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struct idt_entry idt[256];
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struct idt_ptr idtp;
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extern void idt_load();
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void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags)
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{
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idt[num].base_lo = (base & 0xFFFF);
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idt[num].base_hi = (base >> 16) & 0xFFFF;
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idt[num].sel = sel;
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idt[num].always0 = 0;
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idt[num].flags = flags;
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}
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void idt_install()
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{
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idtp.limit = (sizeof (struct idt_entry)*256) - 1;
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idtp.base = (unsigned int)&idt;
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memset(&idt, 0, sizeof(struct idt_entry)*256);
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idt_load();
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printf("[kernel] loaded IDT at idt=0x%x\n", &idt);
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}
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