UefiCpuPkg/CpuMpPei/CpuMpPei.h

   1 /** @file
   2   Definitions to install Multiple Processor PPI.
   3
   4   Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef _CPU_MP_PEI_H_
  16 #define _CPU_MP_PEI_H_
  17
  18 #include <PiPei.h>
  19
  20
  21 #include <Library/BaseLib.h>
  22 #include <Library/PeimEntryPoint.h>
  23
  24 #pragma pack(1)
  25 typedef union {
  26   struct {
  27     UINT32  LimitLow    : 16;
  28     UINT32  BaseLow     : 16;
  29     UINT32  BaseMid     : 8;
  30     UINT32  Type        : 4;
  31     UINT32  System      : 1;
  32     UINT32  Dpl         : 2;
  33     UINT32  Present     : 1;
  34     UINT32  LimitHigh   : 4;
  35     UINT32  Software    : 1;
  36     UINT32  Reserved    : 1;
  37     UINT32  DefaultSize : 1;
  38     UINT32  Granularity : 1;
  39     UINT32  BaseHigh    : 8;
  40   } Bits;
  41   UINT64  Uint64;
  42 } IA32_GDT;
  43 #pragma pack()
  44 /**
  45   Assembly code to load GDT table and update segment accordingly.
  46
  47   @param Gdtr   Pointer to GDT descriptor
  48 **/
  49 VOID
  50 EFIAPI
  51 AsmInitializeGdt (
  52   IN IA32_DESCRIPTOR  *Gdtr
  53   );
  54
  55
  56 #endif