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Remap the IRQ table, enable interrupts

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This commit is contained in:
Braiden Vasco 2017-11-03 04:09:45 +00:00
parent 81fa5a95a1
commit 237148dd51
1 changed files with 18 additions and 0 deletions
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18
arch/protected.c
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@ -2,6 +2,7 @@
#include "config.h"
#include "logger.h"
#include "asm.h"
#include "exception.h"
#include "hwint.h"
@ -51,6 +52,19 @@ void idt_flush(const struct IdtPointer *pointer);
void protected_initialize()
{
logger_info("Remap the IRQ table.");
outportb(0x20, 0x11);
outportb(0xA0, 0x11);
outportb(0x21, 0x20);
outportb(0xA1, 0x28);
outportb(0x21, 0x04);
outportb(0xA1, 0x02);
outportb(0x21, 0x01);
outportb(0xA1, 0x01);
outportb(0x21, 0x00);
outportb(0xA1, 0x00);
logger_info("Setup GDT.");
gdt_set_gate(GDT_NULL_INDEX, 0, 0x00000000, 0, 0);
@ -128,6 +142,10 @@ void protected_initialize()
idt_pointer.base = (unsigned int)&idt_entries;
idt_flush(&idt_pointer);
logger_info("Enable interrupts.");
asm volatile ("sti");
}
void gdt_set_gate(int num, unsigned int base, unsigned int limit, unsigned char access, unsigned char gran)