/** @file
  IA32 Local APIC Definitions.

  Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#pragma once

//
// Definition for Local APIC registers and related values
//
#define XAPIC_ID_OFFSET                          0x20
#define XAPIC_VERSION_OFFSET                     0x30
#define XAPIC_EOI_OFFSET                         0x0b0
#define XAPIC_ICR_DFR_OFFSET                     0x0e0
#define XAPIC_SPURIOUS_VECTOR_OFFSET             0x0f0
#define XAPIC_ICR_LOW_OFFSET                     0x300
#define XAPIC_ICR_HIGH_OFFSET                    0x310
#define XAPIC_LVT_TIMER_OFFSET                   0x320
#define XAPIC_LVT_LINT0_OFFSET                   0x350
#define XAPIC_LVT_LINT1_OFFSET                   0x360
#define XAPIC_TIMER_INIT_COUNT_OFFSET            0x380
#define XAPIC_TIMER_CURRENT_COUNT_OFFSET         0x390
#define XAPIC_TIMER_DIVIDE_CONFIGURATION_OFFSET  0x3E0

#define X2APIC_MSR_BASE_ADDRESS  0x800
#define X2APIC_MSR_ICR_ADDRESS   0x830

#define LOCAL_APIC_DELIVERY_MODE_FIXED            0
#define LOCAL_APIC_DELIVERY_MODE_LOWEST_PRIORITY  1
#define LOCAL_APIC_DELIVERY_MODE_SMI              2
#define LOCAL_APIC_DELIVERY_MODE_NMI              4
#define LOCAL_APIC_DELIVERY_MODE_INIT             5
#define LOCAL_APIC_DELIVERY_MODE_STARTUP          6
#define LOCAL_APIC_DELIVERY_MODE_EXTINT           7

#define LOCAL_APIC_DESTINATION_SHORTHAND_NO_SHORTHAND        0
#define LOCAL_APIC_DESTINATION_SHORTHAND_SELF                1
#define LOCAL_APIC_DESTINATION_SHORTHAND_ALL_INCLUDING_SELF  2
#define LOCAL_APIC_DESTINATION_SHORTHAND_ALL_EXCLUDING_SELF  3

//
// Local APIC Version Register.
//
typedef union {
  struct {
    UINT32    Version                 : 8; ///< The version numbers of the local APIC.
    UINT32    Reserved0               : 8; ///< Reserved.
    UINT32    MaxLvtEntry             : 8; ///< Number of LVT entries minus 1.
    UINT32    EoiBroadcastSuppression : 1; ///< 1 if EOI-broadcast suppression supported.
    UINT32    Reserved1               : 7; ///< Reserved.
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_VERSION;

//
// Low half of Interrupt Command Register (ICR).
//
typedef union {
  struct {
    UINT32    Vector               : 8;  ///< The vector number of the interrupt being sent.
    UINT32    DeliveryMode         : 3;  ///< Specifies the type of IPI to be sent.
    UINT32    DestinationMode      : 1;  ///< 0: physical destination mode, 1: logical destination mode.
    UINT32    DeliveryStatus       : 1;  ///< Indicates the IPI delivery status. This field is reserved in x2APIC mode.
    UINT32    Reserved0            : 1;  ///< Reserved.
    UINT32    Level                : 1;  ///< 0 for the INIT level de-assert delivery mode. Otherwise 1.
    UINT32    TriggerMode          : 1;  ///< 0: edge, 1: level when using the INIT level de-assert delivery mode.
    UINT32    Reserved1            : 2;  ///< Reserved.
    UINT32    DestinationShorthand : 2;  ///< A shorthand notation to specify the destination of the interrupt.
    UINT32    Reserved2            : 12; ///< Reserved.
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_ICR_LOW;

//
// High half of Interrupt Command Register (ICR)
//
typedef union {
  struct {
    UINT32    Reserved0   : 24; ///< Reserved.
    UINT32    Destination : 8;  ///< Specifies the target processor or processors in xAPIC mode.
  } Bits;
  UINT32    Uint32;         ///< Destination field expanded to 32-bit in x2APIC mode.
} LOCAL_APIC_ICR_HIGH;

//
// Spurious-Interrupt Vector Register (SVR)
//
typedef union {
  struct {
    UINT32    SpuriousVector          : 8;  ///< Spurious Vector.
    UINT32    SoftwareEnable          : 1;  ///< APIC Software Enable/Disable.
    UINT32    FocusProcessorChecking  : 1;  ///< Focus Processor Checking.
    UINT32    Reserved0               : 2;  ///< Reserved.
    UINT32    EoiBroadcastSuppression : 1;  ///< EOI-Broadcast Suppression.
    UINT32    Reserved1               : 19; ///< Reserved.
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_SVR;

//
// Divide Configuration Register (DCR)
//
typedef union {
  struct {
    UINT32    DivideValue1 : 2;  ///< Low 2 bits of the divide value.
    UINT32    Reserved0    : 1;  ///< Always 0.
    UINT32    DivideValue2 : 1;  ///< Highest 1 bit of the divide value.
    UINT32    Reserved1    : 28; ///< Reserved.
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_DCR;

//
// LVT Timer Register
//
typedef union {
  struct {
    UINT32    Vector         : 8;  ///< The vector number of the interrupt being sent.
    UINT32    Reserved0      : 4;  ///< Reserved.
    UINT32    DeliveryStatus : 1;  ///< 0: Idle, 1: send pending.
    UINT32    Reserved1      : 3;  ///< Reserved.
    UINT32    Mask           : 1;  ///< 0: Not masked, 1: Masked.
    UINT32    TimerMode      : 1;  ///< 0: One-shot, 1: Periodic.
    UINT32    Reserved2      : 14; ///< Reserved.
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_LVT_TIMER;

//
// LVT LINT0/LINT1 Register
//
typedef union {
  struct {
    UINT32    Vector           : 8;  ///< The vector number of the interrupt being sent.
    UINT32    DeliveryMode     : 3;  ///< Specifies the type of interrupt to be sent.
    UINT32    Reserved0        : 1;  ///< Reserved.
    UINT32    DeliveryStatus   : 1;  ///< 0: Idle, 1: send pending.
    UINT32    InputPinPolarity : 1;  ///< Interrupt Input Pin Polarity.
    UINT32    RemoteIrr        : 1;  ///< RO. Set when the local APIC accepts the interrupt and reset when an EOI is received.
    UINT32    TriggerMode      : 1;  ///< 0:edge, 1:level.
    UINT32    Mask             : 1;  ///< 0: Not masked, 1: Masked.
    UINT32    Reserved1        : 15; ///< Reserved.
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_LVT_LINT;

//
// MSI Address Register
//
typedef union {
  struct {
    UINT32    Reserved0       : 2;  ///< Reserved
    UINT32    DestinationMode : 1;  ///< Specifies the Destination Mode.
    UINT32    RedirectionHint : 1;  ///< Specifies the Redirection Hint.
    UINT32    Reserved1       : 8;  ///< Reserved.
    UINT32    DestinationId   : 8;  ///< Specifies the Destination ID.
    UINT32    BaseAddress     : 12; ///< Must be 0FEEH
  } Bits;
  UINT32    Uint32;
} LOCAL_APIC_MSI_ADDRESS;

//
// MSI Address Register
//
typedef union {
  struct {
    UINT32    Vector       : 8;  ///< Interrupt vector in range 010h..0FEH
    UINT32    DeliveryMode : 3;  ///< Specifies the type of interrupt to be sent.
    UINT32    Reserved0    : 3;  ///< Reserved.
    UINT32    Level        : 1;  ///< 0:Deassert, 1:Assert.  Ignored for Edge triggered interrupts.
    UINT32    TriggerMode  : 1;  ///< 0:Edge,     1:Level.
    UINT32    Reserved1    : 16; ///< Reserved.
    UINT32    Reserved2    : 32; ///< Reserved.
  } Bits;
  UINT64    Uint64;
} LOCAL_APIC_MSI_DATA;
