PcAtChipsetPkg/Include/Register/IoApic.h

   1 /** @file
   2   I/O APIC Register Definitions from 82093AA I/O Advanced Programmable Interrupt
   3   Controller (IOAPIC), 1996.
   4
   5   Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #ifndef __IO_APIC_H__
  11 #define __IO_APIC_H__
  12
  13 ///
  14 /// I/O APIC Register Offsets
  15 ///
  16 #define IOAPIC_INDEX_OFFSET  0x00
  17 #define IOAPIC_DATA_OFFSET   0x10
  18
  19 ///
  20 /// I/O APIC Indirect Register Indexes
  21 ///
  22 #define IO_APIC_IDENTIFICATION_REGISTER_INDEX  0x00
  23 #define IO_APIC_VERSION_REGISTER_INDEX         0x01
  24 #define IO_APIC_REDIRECTION_TABLE_ENTRY_INDEX  0x10
  25
  26 ///
  27 /// I/O APIC Interrupt Deliver Modes
  28 ///
  29 #define IO_APIC_DELIVERY_MODE_FIXED            0
  30 #define IO_APIC_DELIVERY_MODE_LOWEST_PRIORITY  1
  31 #define IO_APIC_DELIVERY_MODE_SMI              2
  32 #define IO_APIC_DELIVERY_MODE_NMI              4
  33 #define IO_APIC_DELIVERY_MODE_INIT             5
  34 #define IO_APIC_DELIVERY_MODE_EXTINT           7
  35
  36 #pragma pack(1)
  37
  38 typedef union {
  39   struct {
  40     UINT32    Reserved0      : 24;
  41     UINT32    Identification : 4;
  42     UINT32    Reserved1      : 4;
  43   } Bits;
  44   UINT32    Uint32;
  45 } IO_APIC_IDENTIFICATION_REGISTER;
  46
  47 typedef union {
  48   struct {
  49     UINT32    Version                 : 8;
  50     UINT32    Reserved0               : 8;
  51     UINT32    MaximumRedirectionEntry : 8;
  52     UINT32    Reserved1               : 8;
  53   } Bits;
  54   UINT32    Uint32;
  55 } IO_APIC_VERSION_REGISTER;
  56
  57 typedef union {
  58   struct {
  59     UINT32    Vector          :          8;
  60     UINT32    DeliveryMode    :    3;
  61     UINT32    DestinationMode : 1;
  62     UINT32    DeliveryStatus  :  1;
  63     UINT32    Polarity        :        1;
  64     UINT32    RemoteIRR       :       1;
  65     UINT32    TriggerMode     :     1;
  66     UINT32    Mask            :            1;
  67     UINT32    Reserved0       :       15;
  68     UINT32    Reserved1       :       24;
  69     UINT32    DestinationID   :   8;
  70   } Bits;
  71   struct {
  72     UINT32    Low;
  73     UINT32    High;
  74   } Uint32;
  75   UINT64    Uint64;
  76 } IO_APIC_REDIRECTION_TABLE_ENTRY;
  77
  78 #pragma pack()
  79
  80 #endif