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[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / X64 / VirtualMemory.h

/** @file\r
  x64 Long Mode Virtual Memory Management Definitions  \r
\r
  References:\r
    1) IA-32 Intel(R) Architecture Software Developer's Manual Volume 1:Basic Architecture, Intel\r
    2) IA-32 Intel(R) Architecture Software Developer's Manual Volume 2:Instruction Set Reference, Intel\r
    3) IA-32 Intel(R) Architecture Software Developer's Manual Volume 3:System Programmer's Guide, Intel\r
    4) AMD64 Architecture Programmer's Manual Volume 2: System Programming\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/  \r
#ifndef _VIRTUAL_MEMORY_H_\r
#define _VIRTUAL_MEMORY_H_\r
\r
\r
#define SYS_CODE64_SEL 0x38\r
\r
#pragma pack(1)\r
\r
typedef union {\r
  struct {\r
    UINT32  LimitLow    : 16;\r
    UINT32  BaseLow     : 16;\r
    UINT32  BaseMid     : 8;\r
    UINT32  Type        : 4;\r
    UINT32  System      : 1;\r
    UINT32  Dpl         : 2;\r
    UINT32  Present     : 1;\r
    UINT32  LimitHigh   : 4;\r
    UINT32  Software    : 1;\r
    UINT32  Reserved    : 1;\r
    UINT32  DefaultSize : 1;\r
    UINT32  Granularity : 1;\r
    UINT32  BaseHigh    : 8;\r
  } Bits;\r
  UINT64  Uint64;\r
} IA32_GDT;\r
\r
typedef struct {\r
  IA32_IDT_GATE_DESCRIPTOR  Ia32IdtEntry;\r
  UINT32                    Offset32To63;\r
  UINT32                    Reserved;\r
} X64_IDT_GATE_DESCRIPTOR;\r
\r
//\r
// Page-Map Level-4 Offset (PML4) and\r
// Page-Directory-Pointer Offset (PDPE) entries 4K & 2MB\r
//\r
\r
typedef union {\r
  struct {\r
    UINT64  Present:1;                // 0 = Not present in memory, 1 = Present in memory\r
    UINT64  ReadWrite:1;              // 0 = Read-Only, 1= Read/Write\r
    UINT64  UserSupervisor:1;         // 0 = Supervisor, 1=User\r
    UINT64  WriteThrough:1;           // 0 = Write-Back caching, 1=Write-Through caching\r
    UINT64  CacheDisabled:1;          // 0 = Cached, 1=Non-Cached\r
    UINT64  Accessed:1;               // 0 = Not accessed, 1 = Accessed (set by CPU)\r
    UINT64  Reserved:1;               // Reserved\r
    UINT64  MustBeZero:2;             // Must Be Zero\r
    UINT64  Available:3;              // Available for use by system software\r
    UINT64  PageTableBaseAddress:40;  // Page Table Base Address\r
    UINT64  AvabilableHigh:11;        // Available for use by system software\r
    UINT64  Nx:1;                     // No Execute bit\r
  } Bits;\r
  UINT64    Uint64;\r
} PAGE_MAP_AND_DIRECTORY_POINTER;\r
\r
//\r
// Page Table Entry 2MB\r
//\r
typedef union {\r
  struct {\r
    UINT64  Present:1;                // 0 = Not present in memory, 1 = Present in memory\r
    UINT64  ReadWrite:1;              // 0 = Read-Only, 1= Read/Write\r
    UINT64  UserSupervisor:1;         // 0 = Supervisor, 1=User\r
    UINT64  WriteThrough:1;           // 0 = Write-Back caching, 1=Write-Through caching\r
    UINT64  CacheDisabled:1;          // 0 = Cached, 1=Non-Cached\r
    UINT64  Accessed:1;               // 0 = Not accessed, 1 = Accessed (set by CPU)\r
    UINT64  Dirty:1;                  // 0 = Not Dirty, 1 = written by processor on access to page\r
    UINT64  MustBe1:1;                // Must be 1 \r
    UINT64  Global:1;                 // 0 = Not global page, 1 = global page TLB not cleared on CR3 write\r
    UINT64  Available:3;              // Available for use by system software\r
    UINT64  PAT:1;                    //\r
    UINT64  MustBeZero:8;             // Must be zero;\r
    UINT64  PageTableBaseAddress:31;  // Page Table Base Address\r
    UINT64  AvabilableHigh:11;        // Available for use by system software\r
    UINT64  Nx:1;                     // 0 = Execute Code, 1 = No Code Execution\r
  } Bits;\r
  UINT64    Uint64;\r
} PAGE_TABLE_ENTRY;\r
\r
#pragma pack()\r
\r
\r
/**\r
  Allocates and fills in the Page Directory and Page Table Entries to\r
  establish a 1:1 Virtual to Physical mapping.\r
\r
  @param  NumberOfProcessorPhysicalAddressBits  Number of processor address bits \r
                                                to use. Limits the number of page \r
                                                table entries  to the physical \r
                                                address space. \r
\r
  @return The address of 4 level page map.\r
\r
**/\r
UINTN\r
CreateIdentityMappingPageTables (\r
  VOID\r
  );\r
\r
\r
/**\r
 \r
  Fix up the vector number in the vector code.\r
 \r
  @param VectorBase   Base address of the vector handler.\r
  @param VectorNum    Index of vector.\r
\r
**/\r
VOID\r
EFIAPI\r
AsmVectorFixup (\r
  VOID    *VectorBase,\r
  UINT8   VectorNum\r
  );\r
\r
\r
/**\r
 \r
  Get the information of vector template.\r
  \r
  @param TemplateBase   Base address of the template code.\r
 \r
  @return               Size of the Template code.\r
\r
**/\r
UINTN\r
EFIAPI\r
AsmGetVectorTemplatInfo (\r
  OUT   VOID  **TemplateBase\r
  );\r
\r
\r
#endif \r