pat.h

Go to the documentation of this file.

/*++
Copyright (c) 1997-8  Microsoft Corporation

Module Name:

    pat.h

Abstract:

    This module contains the i386 specific Page Attribute
    Table (PAT) register hardware definitions.

Author:

    Shivnandan Kaushik (Intel Corp)

Environment:

    Kernel mode only.

Revision History:

--*/
//
// PAT MSR architecture definitions
//

//
// PAT model specific register
//

#define PAT_MSR       0x277

//
// PAT memory attributes
//

#define PAT_TYPE_STRONG_UC  0       // corresponds to PPro PCD=1,PWT=1
#define PAT_TYPE_USWC       1
#define PAT_TYPE_WT         4
#define PAT_TYPE_WP         5
#define PAT_TYPE_WB         6
#define PAT_TYPE_WEAK_UC    7       // corresponds to PPro PCD=1,PWT=0
#define PAT_TYPE_MAX        8       

#include "pshpack1.h"

typedef union _PAT {
    struct {
        UCHAR Pat[8];
    } hw;
    ULONGLONG   QuadPart;
} PAT, *PPAT;

#include "poppack.h"

---