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UefiCpuPkg/MtrrLib: Add MtrrGetMemoryAttributeInVariableMtrrWorker () 

Add function to shadow the content of variable MTRRs into an internal array:
VariableMtrr. And used MtrrGetMemoryAttributeInVariableMtrrWorker() in other
functions.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19156 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Michael Kinney 2015-12-08 05:23:13 +00:00 committed by vanjeff
parent acf431e6f7
commit d0baed7db5
1 changed files with 82 additions and 39 deletions
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115
UefiCpuPkg/Library/MtrrLib/MtrrLib.c
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@ -495,6 +495,50 @@ ProgramFixedMtrr (
}
/**
Worker function gets the attribute of variable MTRRs.
This function shadows the content of variable MTRRs into an
internal array: VariableMtrr.
@param[in] VariableSettings The variable MTRR values to shadow
@param[in] FirmwareVariableMtrrCount The number of variable MTRRs available to firmware
@param[in] MtrrValidBitsMask The mask for the valid bit of the MTRR
@param[in] MtrrValidAddressMask The valid address mask for MTRR
@param[out] VariableMtrr The array to shadow variable MTRRs content
@return The return value of this parameter indicates the
number of MTRRs which has been used.
**/
UINT32
MtrrGetMemoryAttributeInVariableMtrrWorker (
IN MTRR_VARIABLE_SETTINGS *VariableSettings,
IN UINTN FirmwareVariableMtrrCount,
IN UINT64 MtrrValidBitsMask,
IN UINT64 MtrrValidAddressMask,
OUT VARIABLE_MTRR *VariableMtrr
)
{
UINTN Index;
UINT32 UsedMtrr;
ZeroMem (VariableMtrr, sizeof (VARIABLE_MTRR) * MTRR_NUMBER_OF_VARIABLE_MTRR);
for (Index = 0, UsedMtrr = 0; Index < FirmwareVariableMtrrCount; Index++) {
if ((VariableSettings->Mtrr[Index].Mask & MTRR_LIB_CACHE_MTRR_ENABLED) != 0) {
VariableMtrr[Index].Msr = (UINT32)Index;
VariableMtrr[Index].BaseAddress = (VariableSettings->Mtrr[Index].Base & MtrrValidAddressMask);
VariableMtrr[Index].Length = ((~(VariableSettings->Mtrr[Index].Mask & MtrrValidAddressMask)) & MtrrValidBitsMask) + 1;
VariableMtrr[Index].Type = (VariableSettings->Mtrr[Index].Base & 0x0ff);
VariableMtrr[Index].Valid = TRUE;
VariableMtrr[Index].Used = TRUE;
UsedMtrr++;
}
}
return UsedMtrr;
}
/**
Gets the attribute of variable MTRRs.
@ -517,46 +561,24 @@ MtrrGetMemoryAttributeInVariableMtrr (
OUT VARIABLE_MTRR *VariableMtrr
)
{
UINTN Index;
UINT32 MsrNum;
UINT32 UsedMtrr;
UINT32 FirmwareVariableMtrrCount;
UINT32 VariableMtrrEnd;
MTRR_VARIABLE_SETTINGS VariableSettings;
if (!IsMtrrSupported ()) {
return 0;
}
FirmwareVariableMtrrCount = GetFirmwareVariableMtrrCountWorker ();
VariableMtrrEnd = MTRR_LIB_IA32_VARIABLE_MTRR_BASE + (2 * GetVariableMtrrCount ()) - 1;
ZeroMem (VariableMtrr, sizeof (VARIABLE_MTRR) * MTRR_NUMBER_OF_VARIABLE_MTRR);
UsedMtrr = 0;
for (MsrNum = MTRR_LIB_IA32_VARIABLE_MTRR_BASE, Index = 0;
(
(MsrNum < VariableMtrrEnd) &&
(Index < FirmwareVariableMtrrCount)
MtrrGetVariableMtrrWorker (
GetVariableMtrrCountWorker (),
&VariableSettings
);
return MtrrGetMemoryAttributeInVariableMtrrWorker (
&VariableSettings,
GetFirmwareVariableMtrrCountWorker (),
MtrrValidBitsMask,
MtrrValidAddressMask,
VariableMtrr
);
MsrNum += 2
) {
if ((AsmReadMsr64 (MsrNum + 1) & MTRR_LIB_CACHE_MTRR_ENABLED) != 0) {
VariableMtrr[Index].Msr = MsrNum;
VariableMtrr[Index].BaseAddress = (AsmReadMsr64 (MsrNum) &
MtrrValidAddressMask);
VariableMtrr[Index].Length = ((~(AsmReadMsr64 (MsrNum + 1) &
MtrrValidAddressMask)
) &
MtrrValidBitsMask
) + 1;
VariableMtrr[Index].Type = (AsmReadMsr64 (MsrNum) & 0x0ff);
VariableMtrr[Index].Valid = TRUE;
VariableMtrr[Index].Used = TRUE;
UsedMtrr = UsedMtrr + 1;
Index++;
}
}
return UsedMtrr;
}
@ -1092,6 +1114,7 @@ MtrrGetMemoryAttribute (
UINT64 MtrrValidBitsMask;
UINT64 MtrrValidAddressMask;
UINTN VariableMtrrCount;
MTRR_VARIABLE_SETTINGS VariableSettings;
if (!IsMtrrSupported ()) {
return CacheUncacheable;
@ -1133,7 +1156,15 @@ MtrrGetMemoryAttribute (
}
}
MtrrLibInitializeMtrrMask(&MtrrValidBitsMask, &MtrrValidAddressMask);
MtrrGetMemoryAttributeInVariableMtrr(
MtrrGetVariableMtrrWorker (
GetVariableMtrrCountWorker (),
&VariableSettings
);
MtrrGetMemoryAttributeInVariableMtrrWorker (
&VariableSettings,
GetFirmwareVariableMtrrCountWorker (),
MtrrValidBitsMask,
MtrrValidAddressMask,
VariableMtrr
@ -1358,6 +1389,9 @@ MtrrSetMemoryAttribute (
UINT32 VariableMtrrEnd;
MTRR_CONTEXT MtrrContext;
UINT32 VariableMtrrCount;
MTRR_VARIABLE_SETTINGS OriginalVariableSettings;
MTRR_VARIABLE_SETTINGS WorkingVariableSettings;
MTRR_VARIABLE_SETTINGS *VariableSettings;
DEBUG((DEBUG_CACHE, "MtrrSetMemoryAttribute() %a:%016lx-%016lx\n", mMtrrMemoryCacheTypeShortName[Attribute], BaseAddress, Length));
@ -1426,11 +1460,20 @@ MtrrSetMemoryAttribute (
// Read all variable MTRRs
//
VariableMtrrCount = GetVariableMtrrCountWorker ();
MtrrGetVariableMtrrWorker (VariableMtrrCount, &OriginalVariableSettings);
CopyMem (&WorkingVariableSettings, &OriginalVariableSettings, sizeof (WorkingVariableSettings));
VariableSettings = &WorkingVariableSettings;
//
// Check for overlap
//
UsedMtrr = MtrrGetMemoryAttributeInVariableMtrr (MtrrValidBitsMask, MtrrValidAddressMask, VariableMtrr);
UsedMtrr = MtrrGetMemoryAttributeInVariableMtrrWorker (
VariableSettings,
FirmwareVariableMtrrCount,
MtrrValidBitsMask,
MtrrValidAddressMask,
VariableMtrr
);
OverLap = CheckMemoryAttributeOverlap (
FirmwareVariableMtrrCount,
BaseAddress,