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357 lines
8.5 KiB
357 lines
8.5 KiB
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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mtrr.c
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Abstract:
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WinDbg Extension Api
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Author:
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Ken Reneris (kenr) 06-June-1994
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Environment:
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User Mode.
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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ULONG
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FindFirstSetRightBit (
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IN ULONGLONG Set
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);
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ULONGLONG
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MaskToLength (
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IN ULONGLONG Mask
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);
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//
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// MTRR MSR architecture definitions
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//
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#define MTRR_MSR_CAPABILITIES 0x0fe
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#define MTRR_MSR_DEFAULT 0x2ff
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#define MTRR_MSR_VARIABLE_BASE 0x200
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#define MTRR_MSR_VARIABLE_MASK (MTRR_MSR_VARIABLE_BASE+1)
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#define MTRR_PAGE_SIZE 4096
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#define MTRR_PAGE_MASK (MTRR_PAGE_SIZE-1)
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//
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// Memory range types
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//
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#define MTRR_TYPE_UC 0
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#define MTRR_TYPE_USWC 1
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#define MTRR_TYPE_WT 4
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#define MTRR_TYPE_WP 5
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#define MTRR_TYPE_WB 6
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#define MTRR_TYPE_MAX 7
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// #include "pshpack1.h"
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typedef struct _MTRR_CAPABILITIES {
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union {
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struct {
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ULONG VarCnt:8;
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ULONG FixSupported:1;
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ULONG Reserved_0:1;
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ULONG UswcSupported:1;
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} hw;
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ULONGLONG QuadPart;
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} u;
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} MTRR_CAPABILITIES;
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typedef struct _MTRR_DEFAULT {
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union {
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struct {
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ULONG Type:8;
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ULONG Reserved_0:2;
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ULONG FixedEnabled:1;
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ULONG MtrrEnabled:1;
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} hw;
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ULONGLONG QuadPart;
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} u;
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} MTRR_DEFAULT;
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typedef struct _MTRR_VARIABLE_BASE {
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union {
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struct {
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ULONGLONG Type:8;
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ULONGLONG Reserved_0:4;
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ULONGLONG PhysBase:52;
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} hw;
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ULONGLONG QuadPart;
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} u;
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} MTRR_VARIABLE_BASE;
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#define MTRR_MASK_BASE (~0xfff)
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typedef struct _MTRR_VARIABLE_MASK {
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union {
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struct {
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ULONGLONG Reserved_0:11;
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ULONGLONG Valid:1;
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ULONGLONG PhysMask:52;
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} hw;
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ULONGLONG QuadPart;
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} u;
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} MTRR_VARIABLE_MASK;
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#define MTRR_MASK_MASK (~0xfff)
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// Added support for Mask2Length conversion
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#define MTRR_MAX_RANGE_SHIFT 36
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#define MASK_OVERFLOW_MASK (~0x1000000000)
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CCHAR FindFirstSetRight[256] = {
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0, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
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4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0};
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// #include "poppack.h"
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//
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// ----------------------------------------------------------------
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//
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PUCHAR
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MtrrType (
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IN ULONG Type
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)
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{
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PUCHAR p;
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static UCHAR s[20];
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switch (Type) {
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case 0: p = "UC"; break;
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case 1: p = "USWC"; break;
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case 4: p = "WT"; break;
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case 5: p = "WP"; break;
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case 6: p = "WB"; break;
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default:
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sprintf (s, "%02x??", Type & 0xff);
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p = s;
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break;
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}
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return p;
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}
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VOID
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MtrrDumpFixed (
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IN ULONG Base,
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IN ULONG Size,
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IN ULONG Msr
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)
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{
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ULONG x;
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ULONGLONG li;
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ReadMsr(Msr, &li);
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for (x=0; x < 8; x++) {
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dprintf ("%s:%05x-%05x ",
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MtrrType ( ((ULONG) li) & 0xff ),
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Base,
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Base + Size - 1
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);
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li >>= 8;
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Base += Size;
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if (x == 3) {
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dprintf ("\n");
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}
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}
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dprintf ("\n");
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}
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#define KF_MTRR 0x00000040
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DECLARE_API( mtrr )
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/*++
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Routine Description:
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Dumps processors mtrr
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Arguments:
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args - none
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Return Value:
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None
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--*/
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{
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MTRR_CAPABILITIES Capabilities;
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MTRR_DEFAULT Default;
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MTRR_VARIABLE_BASE Base;
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MTRR_VARIABLE_MASK Mask;
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ULONG Index;
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ULONG i;
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PUCHAR p;
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ULONG fb;
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ULONG64 addr=0;
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ULONGLONG Length, MtrrBase, MtrrMask;
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BOOL ContiguousLength = TRUE;
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//
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// Quick sanity check
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//
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if (TargetMachine != IMAGE_FILE_MACHINE_I386) {
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dprintf("!mtrr is X86 only Api.\n");
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return E_INVALIDARG;
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}
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i = 0;
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addr = GetExpression(args);
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if (i != 1) {
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addr = GetExpression("KeFeatureBits");
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if (!addr) {
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dprintf ("KeFeatureBits not found\n");
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return E_INVALIDARG;
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}
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fb = 0;
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ReadMemory(addr, &fb, sizeof(fb), &i);
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if (fb == -1 || !(fb & KF_MTRR)) {
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dprintf ("MTRR feature not present\n");
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return E_INVALIDARG;
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}
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}
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//
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// Dump MTRR
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//
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ReadMsr(MTRR_MSR_CAPABILITIES, &Capabilities.u.QuadPart);
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ReadMsr(MTRR_MSR_DEFAULT, &Default.u.QuadPart);
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dprintf ("MTTR: %s Var %d, Fixed-%s %s, USWC-%s, Default: %s\n",
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Default.u.hw.MtrrEnabled ? "" : "disabled",
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Capabilities.u.hw.VarCnt,
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Capabilities.u.hw.FixSupported ? "support" : "none",
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Default.u.hw.FixedEnabled ? "enabled" : "disabled",
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Capabilities.u.hw.UswcSupported ? "supported" : "none",
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MtrrType (Default.u.hw.Type)
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);
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MtrrDumpFixed (0x00000, 64*1024, 0x250);
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MtrrDumpFixed (0x80000, 16*1024, 0x258);
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MtrrDumpFixed (0xA0000, 16*1024, 0x259);
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MtrrDumpFixed (0xC0000, 4*1024, 0x268);
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MtrrDumpFixed (0xC8000, 4*1024, 0x269);
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MtrrDumpFixed (0xD0000, 4*1024, 0x26A);
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MtrrDumpFixed (0xD8000, 4*1024, 0x26B);
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MtrrDumpFixed (0xE0000, 4*1024, 0x26C);
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MtrrDumpFixed (0xE8000, 4*1024, 0x26D);
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MtrrDumpFixed (0xF0000, 4*1024, 0x26E);
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MtrrDumpFixed (0xE8000, 4*1024, 0x26F);
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dprintf ("Variable: Base Mask Length\n");
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for (Index=0; Index < (ULONG) Capabilities.u.hw.VarCnt; Index++) {
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ReadMsr(MTRR_MSR_VARIABLE_BASE+2*Index, &Base.u.QuadPart);
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ReadMsr(MTRR_MSR_VARIABLE_MASK+2*Index, &Mask.u.QuadPart);
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dprintf (" %2d. ", Index);
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if (Mask.u.hw.Valid) {
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MtrrMask = Mask.u.QuadPart & MTRR_MASK_MASK;
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MtrrBase = Base.u.QuadPart & MTRR_MASK_BASE;
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Length = MaskToLength(MtrrMask);
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// Check for non-contiguous MTRR mask.
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if ((MtrrMask + Length) & MASK_OVERFLOW_MASK) {
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ContiguousLength = FALSE;
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}
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dprintf ("%4s: %08x:%08x %08x:%08x %08x:%08x",
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MtrrType ((ULONG) Base.u.hw.Type),
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(ULONG) (Base.u.QuadPart >> 32), (ULONG) MtrrBase,
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(ULONG) (Mask.u.QuadPart >> 32), (ULONG) MtrrMask,
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(ULONG) (Length >> 32), (ULONG) Length);
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if (ContiguousLength == FALSE) {
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ContiguousLength = TRUE;
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dprintf("(non-contiguous)\n");
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}
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else {
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dprintf("\n");
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}
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} else {
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dprintf ("\n");
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}
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}
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return S_OK;
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}
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ULONGLONG
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MaskToLength (
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IN ULONGLONG Mask
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)
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/*++
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Routine Description:
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This function returns the length specified by a particular
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mtrr variable register mask.
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--*/
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{
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if (Mask == 0) {
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// Zero Mask signifies a length of 2**36
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return(((ULONGLONG) 1 << MTRR_MAX_RANGE_SHIFT));
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} else {
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return(((ULONGLONG) 1 << FindFirstSetRightBit(Mask)));
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}
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}
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ULONG
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FindFirstSetRightBit (
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IN ULONGLONG Set
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)
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/*++
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Routine Description:
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This function returns a bit position of the least significant
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bit set in the passed ULONGLONG parameter. Passed parameter
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must be non-zero.
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--*/
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{
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ULONG bitno;
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for (bitno=0; !(Set & 0xFF); bitno += 8, Set >>= 8) ;
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return FindFirstSetRight[Set & 0xFF] + bitno;
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}
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