irq.h File Reference

x86-32 interrupt/exception handling More...

Data Structures
struct	gate_descriptor
struct	region_descriptor
union	segment_descriptor
	Segment descriptor. More...

Macros
#define	NEXCEPTIONS   32
	Number of (reserved) hardware exceptions.
#define	NDISPATCH   (NIDT - NEXCEPTIONS)
	Size of hardware IRQ dispatch table == #NIDT - NEXCEPTIONS exceptions.
#define	NULL_SEL   0
#define	KCODE_SEL   1
#define	KSTACK_SEL   2
#define	USTACK_SEL   3
#define	UCODE_SEL   4
#define	TSS_SEL   5
#define	DISP_SEL   6
#define	NGDT_MEM   7

Detailed Description

x86-32 interrupt/exception handling

Macro Definition Documentation

#define DISP_SEL   6

Dispatcher pointer

#define KCODE_SEL   1

Kernel code descriptor

#define KSTACK_SEL   2

Shared user/kernel stack descriptor

#define NGDT_MEM   7

Number of descriptors

#define NULL_SEL   0

Null descriptor

#define TSS_SEL   5

Task State Segment (TSS)

#define UCODE_SEL   4

User code descriptor

#define USTACK_SEL   3

User stack descriptor