irq.h File Reference

x86-64 interrupt/exception handling More...

Data Structures
struct	gate_descriptor
struct	region_descriptor

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_LO_SEL   5
#define	TSS_HI_SEL   6
#define	LDT_LO_SEL   7
#define	LDT_HI_SEL   8
#define	NGDT_MEM   9

Detailed Description

x86-64 interrupt/exception handling

Macro Definition Documentation

#define KCODE_SEL   1

Kernel code descriptor

#define KSTACK_SEL   2

Shared user/kernel stack descriptor

#define LDT_HI_SEL   8

Local descriptor table (LDT) – high

#define LDT_LO_SEL   7

Local descriptor table (LDT) – low

#define NGDT_MEM   9

Number of descriptors

#define NULL_SEL   0

Null descriptor

#define TSS_HI_SEL   6

Task State Segment (TSS) – high 64bit

#define TSS_LO_SEL   5

Task State Segment (TSS) – low 64bit

#define UCODE_SEL   4

User code descriptor

#define USTACK_SEL   3

User stack descriptor