EdkModulePkg/Core/DxeIplX64Peim/x64/VirtualMemory.h

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13   VirtualMemory.h
  14
  15 Abstract:
  16
  17   x64 Long Mode Virtual Memory Management Definitions
  18
  19   References:
  20     1) IA-32 Intel(R) Atchitecture Software Developer's Manual Volume 1:Basic Architecture, Intel
  21     2) IA-32 Intel(R) Atchitecture Software Developer's Manual Volume 2:Instruction Set Reference, Intel
  22     3) IA-32 Intel(R) Atchitecture Software Developer's Manual Volume 3:System Programmer's Guide, Intel
  23     4) AMD64 Architecture Programmer's Manual Volume 2: System Programming
  24 --*/
  25 #ifndef _VIRTUAL_MEMORY_H_
  26 #define _VIRTUAL_MEMORY_H_
  27
  28
  29 #pragma pack(1)
  30
  31 //
  32 // Page-Map Level-4 Offset (PML4) and
  33 // Page-Directory-Pointer Offset (PDPE) entries 4K & 2MB
  34 //
  35
  36 typedef union {
  37   struct {
  38     UINT64  Present:1;                // 0 = Not present in memory, 1 = Present in memory
  39     UINT64  ReadWrite:1;              // 0 = Read-Only, 1= Read/Write
  40     UINT64  UserSupervisor:1;         // 0 = Supervisor, 1=User
  41     UINT64  WriteThrough:1;           // 0 = Write-Back caching, 1=Write-Through caching
  42     UINT64  CacheDisabled:1;          // 0 = Cached, 1=Non-Cached
  43     UINT64  Accessed:1;               // 0 = Not accessed, 1 = Accessed (set by CPU)
  44     UINT64  Reserved:1;               // Reserved
  45     UINT64  MustBeZero:2;             // Must Be Zero
  46     UINT64  Available:3;              // Available for use by system software
  47     UINT64  PageTableBaseAddress:40;  // Page Table Base Address
  48     UINT64  AvabilableHigh:11;        // Available for use by system software
  49     UINT64  Nx:1;                     // No Execute bit
  50   } Bits;
  51   UINT64    Uint64;
  52 } PAGE_MAP_AND_DIRECTORY_POINTER;
  53
  54 //
  55 // Page Table Entry 2MB
  56 //
  57 typedef union {
  58   struct {
  59     UINT64  Present:1;                // 0 = Not present in memory, 1 = Present in memory
  60     UINT64  ReadWrite:1;              // 0 = Read-Only, 1= Read/Write
  61     UINT64  UserSupervisor:1;         // 0 = Supervisor, 1=User
  62     UINT64  WriteThrough:1;           // 0 = Write-Back caching, 1=Write-Through caching
  63     UINT64  CacheDisabled:1;          // 0 = Cached, 1=Non-Cached
  64     UINT64  Accessed:1;               // 0 = Not accessed, 1 = Accessed (set by CPU)
  65     UINT64  Dirty:1;                  // 0 = Not Dirty, 1 = written by processor on access to page
  66     UINT64  MustBe1:1;                // Must be 1
  67     UINT64  Global:1;                 // 0 = Not global page, 1 = global page TLB not cleared on CR3 write
  68     UINT64  Available:3;              // Available for use by system software
  69     UINT64  PAT:1;                    //
  70     UINT64  MustBeZero:8;             // Must be zero;
  71     UINT64  PageTableBaseAddress:31;  // Page Table Base Address
  72     UINT64  AvabilableHigh:11;        // Available for use by system software
  73     UINT64  Nx:1;                     // 0 = Execute Code, 1 = No Code Execution
  74   } Bits;
  75   UINT64    Uint64;
  76 } PAGE_TABLE_ENTRY;
  77
  78 #pragma pack()
  79
  80 EFI_PHYSICAL_ADDRESS
  81 CreateIdentityMappingPageTables (
  82   VOID
  83   )
  84 ;
  85
  86 #endif