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   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #ifndef __IO_APIC_H__
  17 #define __IO_APIC_H__
  18
  19 ///
  20 /// I/O APIC Register Offsets
  21 ///
  22 #define IOAPIC_INDEX_OFFSET  0x00
  23 #define IOAPIC_DATA_OFFSET   0x10
  24
  25 ///
  26 /// I/O APIC Indirect Register Indexes
  27 ///
  28 #define IO_APIC_IDENTIFICATION_REGISTER_INDEX  0x00
  29 #define IO_APIC_VERSION_REGISTER_INDEX         0x01
  30 #define IO_APIC_REDIRECTION_TABLE_ENTRY_INDEX  0x10
  31
  32 ///
  33 /// I/O APIC Interrupt Deliver Modes
  34 ///
  35 #define IO_APIC_DELIVERY_MODE_FIXED            0
  36 #define IO_APIC_DELIVERY_MODE_LOWEST_PRIORITY  1
  37 #define IO_APIC_DELIVERY_MODE_SMI              2
  38 #define IO_APIC_DELIVERY_MODE_NMI              4
  39 #define IO_APIC_DELIVERY_MODE_INIT             5
  40 #define IO_APIC_DELIVERY_MODE_EXTINT           7
  41
  42 #pragma pack(1)
  43
  44 typedef union {
  45   struct {
  46     UINT32  Reserved0:24;
  47     UINT32  Identification:4;
  48     UINT32  Reserved1:4;
  49   } Bits;
  50   UINT32  Uint32;
  51 } IO_APIC_IDENTIFICATION_REGISTER;
  52
  53 typedef union {
  54   struct {
  55     UINT32  Version:8;
  56     UINT32  Reserved0:8;
  57     UINT32  MaximumRedirectionEntry:8;
  58     UINT32  Reserved1:8;
  59   } Bits;
  60   UINT32  Uint32;
  61 } IO_APIC_VERSION_REGISTER;
  62
  63 typedef union {
  64   struct {
  65     UINT32  Vector:          8;
  66     UINT32  DeliveryMode:    3;
  67     UINT32  DestinationMode: 1;
  68     UINT32  DeliveryStatus:  1;
  69     UINT32  Polarity:        1;
  70     UINT32  RemoteIRR:       1;
  71     UINT32  TriggerMode:     1;
  72     UINT32  Mask:            1;
  73     UINT32  Reserved0:       15;
  74     UINT32  Reserved1:       24;
  75     UINT32  DestinationID:   8;
  76   } Bits;
  77   struct {
  78     UINT32  Low;
  79     UINT32  High;
  80   } Uint32;
  81   UINT64  Uint64;
  82 } IO_APIC_REDIRECTION_TABLE_ENTRY;
  83
  84 #pragma pack()
  85
  86 #endif