IoApic.h

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#ifndef __IO_APIC_H__
#define __IO_APIC_H__
 
#define IOAPIC_INDEX_OFFSET  0x00
#define IOAPIC_DATA_OFFSET   0x10
 
#define IO_APIC_IDENTIFICATION_REGISTER_INDEX  0x00
#define IO_APIC_VERSION_REGISTER_INDEX         0x01
#define IO_APIC_REDIRECTION_TABLE_ENTRY_INDEX  0x10
 
#define IO_APIC_DELIVERY_MODE_FIXED            0
#define IO_APIC_DELIVERY_MODE_LOWEST_PRIORITY  1
#define IO_APIC_DELIVERY_MODE_SMI              2
#define IO_APIC_DELIVERY_MODE_NMI              4
#define IO_APIC_DELIVERY_MODE_INIT             5
#define IO_APIC_DELIVERY_MODE_EXTINT           7
 
#pragma pack(1)
 
typedef union {
  struct {
    UINT32    Reserved0      : 24;
    UINT32    Identification : 4;
    UINT32    Reserved1      : 4;
  } Bits;
  UINT32    Uint32;
} IO_APIC_IDENTIFICATION_REGISTER;
 
typedef union {
  struct {
    UINT32    Version                 : 8;
    UINT32    Reserved0               : 8;
    UINT32    MaximumRedirectionEntry : 8;
    UINT32    Reserved1               : 8;
  } Bits;
  UINT32    Uint32;
} IO_APIC_VERSION_REGISTER;
 
typedef union {
  struct {
    UINT32    Vector          :          8;
    UINT32    DeliveryMode    :    3;
    UINT32    DestinationMode : 1;
    UINT32    DeliveryStatus  :  1;
    UINT32    Polarity        :        1;
    UINT32    RemoteIRR       :       1;
    UINT32    TriggerMode     :     1;
    UINT32    Mask            :            1;
    UINT32    Reserved0       :       15;
    UINT32    Reserved1       :       24;
    UINT32    DestinationID   :   8;
  } Bits;
  struct {
    UINT32    Low;
    UINT32    High;
  } Uint32;
  UINT64    Uint64;
} IO_APIC_REDIRECTION_TABLE_ENTRY;
 
#pragma pack()
 
#endif