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[INTERRUPTS] IRQs and the Programmable Interrupt Controller

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This commit is contained in:
Thomas Lovén
2016-11-09 21:16:29 +01:00
parent 8b2e58b6b1
commit b7c0de7ea5
3 changed files with 105 additions and 0 deletions
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37
kernel/include/int.h
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@@ -33,6 +33,30 @@
#define INT_SX 0x1E // Security exception
// Unused exception 0x1F
// User interrupts 0x20 and forward
#define INT_IRQ0 0x20
#define INT_IRQ1 0x21
#define INT_IRQ2 0x22
#define INT_IRQ3 0x23
#define INT_IRQ4 0x24
#define INT_IRQ5 0x25
#define INT_IRQ6 0x26
#define INT_IRQ7 0x27
#define INT_IRQ8 0x28
#define INT_IRQ9 0x29
#define INT_IRQ10 0x2A
#define INT_IRQ11 0x2B
#define INT_IRQ12 0x2C
#define INT_IRQ13 0x2D
#define INT_IRQ14 0x2E
#define INT_IRQ15 0x2F
#define INT_IRQ16 0x30
#define INT_IRQ17 0x31
#define INT_IRQ18 0x32
#define INT_IRQ19 0x33
#define INT_IRQ20 0x34
#define INT_IRQ21 0x35
#define INT_IRQ22 0x36
#define INT_IRQ23 0x37
#ifndef __ASSEMBLER__
#include <stdint.h>
@@ -54,6 +78,19 @@ struct idtr
uint64_t addr;
} __attribute__ ((packed));
void pic_init();
void pic_ack(uint8_t irq);
void pic_mask(uint8_t irq);
void pic_unmask(uint8_t irq);
#define IRQ_INT(irq) (INT_IRQ0 + irq)
#define IRQ(irq) (irq)
#define IRQ_MASK(irq) pic_mask(irq)
#define IRQ_UNMASK(irq) pic_unmask(irq)
#define IRQ_ACK(irq) pic_ack(irq)
#define IRQ_TIMER 0
#define IRQ_KEYBOARD 1
typedef struct registers_st
{
uint64_t rax;