UefiCpuPkg/CpuMpPei: Add AP reset x64 assembly code

[mirror_edk2.git] / UefiCpuPkg / CpuMpPei / CpuMpPei.h

/** @file
  Definitions to install Multiple Processor PPI.

  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _CPU_MP_PEI_H_
#define _CPU_MP_PEI_H_

#include <PiPei.h>


#include <Library/BaseLib.h>
#include <Library/HobLib.h>
#include <Library/PeimEntryPoint.h>

#pragma pack(1)

typedef union {
  struct {
    UINT32  LimitLow    : 16;
    UINT32  BaseLow     : 16;
    UINT32  BaseMid     : 8;
    UINT32  Type        : 4;
    UINT32  System      : 1;
    UINT32  Dpl         : 2;
    UINT32  Present     : 1;
    UINT32  LimitHigh   : 4;
    UINT32  Software    : 1;
    UINT32  Reserved    : 1;
    UINT32  DefaultSize : 1;
    UINT32  Granularity : 1;
    UINT32  BaseHigh    : 8;
  } Bits;
  UINT64  Uint64;
} IA32_GDT;

//
// MP CPU exchange information for AP reset code
//
typedef struct {
  UINTN                 Lock;
  UINTN                 StackStart;
  UINTN                 StackSize;
  UINTN                 CFunction;
  IA32_DESCRIPTOR       GdtrProfile;
  IA32_DESCRIPTOR       IdtrProfile;
  UINTN                 BufferStart;
  UINTN                 PmodeOffset;
  UINTN                 NumApsExecuting;
  UINTN                 LmodeOffset;
  UINTN                 Cr3;
} MP_CPU_EXCHANGE_INFO;

#pragma pack()
/**
  Assembly code to load GDT table and update segment accordingly.

  @param Gdtr   Pointer to GDT descriptor
**/
VOID
EFIAPI
AsmInitializeGdt (
  IN IA32_DESCRIPTOR  *Gdtr
  );


#endif