diff options
| -rw-r--r-- | UefiCpuPkg/Library/MtrrLib/MtrrLib.c | 680 |
1 files changed, 339 insertions, 341 deletions
diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c index b1c12aa..ea2b211 100644 --- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c +++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c @@ -311,6 +311,103 @@ PostMtrrChange ( PostMtrrChangeEnableCache (MtrrContext);
}
+/**
+ Worker function gets the content in fixed MTRRs
+
+ @param[out] FixedSettings A buffer to hold fixed MTRRs content.
+
+ @retval The pointer of FixedSettings
+
+**/
+MTRR_FIXED_SETTINGS*
+MtrrGetFixedMtrrWorker (
+ OUT MTRR_FIXED_SETTINGS *FixedSettings
+ )
+{
+ UINT32 Index;
+
+ for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
+ FixedSettings->Mtrr[Index] =
+ AsmReadMsr64 (mMtrrLibFixedMtrrTable[Index].Msr);
+ }
+
+ return FixedSettings;
+}
+
+
+/**
+ This function gets the content in fixed MTRRs
+
+ @param[out] FixedSettings A buffer to hold fixed MTRRs content.
+
+ @retval The pointer of FixedSettings
+
+**/
+MTRR_FIXED_SETTINGS*
+EFIAPI
+MtrrGetFixedMtrr (
+ OUT MTRR_FIXED_SETTINGS *FixedSettings
+ )
+{
+ if (!IsMtrrSupported ()) {
+ return FixedSettings;
+ }
+
+ return MtrrGetFixedMtrrWorker (FixedSettings);
+}
+
+
+/**
+ Worker function will get the raw value in variable MTRRs
+
+ @param[out] VariableSettings A buffer to hold variable MTRRs content.
+
+ @return The VariableSettings input pointer
+
+**/
+MTRR_VARIABLE_SETTINGS*
+MtrrGetVariableMtrrWorker (
+ OUT MTRR_VARIABLE_SETTINGS *VariableSettings
+ )
+{
+ UINT32 Index;
+ UINT32 VariableMtrrCount;
+
+ VariableMtrrCount = GetVariableMtrrCount ();
+ ASSERT (VariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);
+
+ for (Index = 0; Index < VariableMtrrCount; Index++) {
+ VariableSettings->Mtrr[Index].Base =
+ AsmReadMsr64 (MTRR_LIB_IA32_VARIABLE_MTRR_BASE + (Index << 1));
+ VariableSettings->Mtrr[Index].Mask =
+ AsmReadMsr64 (MTRR_LIB_IA32_VARIABLE_MTRR_BASE + (Index << 1) + 1);
+ }
+
+ return VariableSettings;
+}
+
+/**
+ This function will get the raw value in variable MTRRs
+
+ @param[out] VariableSettings A buffer to hold variable MTRRs content.
+
+ @return The VariableSettings input pointer
+
+**/
+MTRR_VARIABLE_SETTINGS*
+EFIAPI
+MtrrGetVariableMtrr (
+ OUT MTRR_VARIABLE_SETTINGS *VariableSettings
+ )
+{
+ if (!IsMtrrSupported ()) {
+ return VariableSettings;
+ }
+
+ return MtrrGetVariableMtrrWorker (
+ VariableSettings
+ );
+}
/**
Programs fixed MTRRs registers.
@@ -965,6 +1062,248 @@ MtrrPrecedence ( }
+
+/**
+ This function will get the memory cache type of the specific address.
+
+ This function is mainly for debug purpose.
+
+ @param[in] Address The specific address
+
+ @return Memory cache type of the specific address
+
+**/
+MTRR_MEMORY_CACHE_TYPE
+EFIAPI
+MtrrGetMemoryAttribute (
+ IN PHYSICAL_ADDRESS Address
+ )
+{
+ UINT64 TempQword;
+ UINTN Index;
+ UINTN SubIndex;
+ UINT64 MtrrType;
+ UINT64 TempMtrrType;
+ MTRR_MEMORY_CACHE_TYPE CacheType;
+ VARIABLE_MTRR VariableMtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];
+ UINT64 MtrrValidBitsMask;
+ UINT64 MtrrValidAddressMask;
+ UINTN VariableMtrrCount;
+
+ if (!IsMtrrSupported ()) {
+ return CacheUncacheable;
+ }
+
+ //
+ // Check if MTRR is enabled, if not, return UC as attribute
+ //
+ TempQword = AsmReadMsr64 (MTRR_LIB_IA32_MTRR_DEF_TYPE);
+ MtrrType = MTRR_CACHE_INVALID_TYPE;
+
+ if ((TempQword & MTRR_LIB_CACHE_MTRR_ENABLED) == 0) {
+ return CacheUncacheable;
+ }
+
+ //
+ // If address is less than 1M, then try to go through the fixed MTRR
+ //
+ if (Address < BASE_1MB) {
+ if ((TempQword & MTRR_LIB_CACHE_FIXED_MTRR_ENABLED) != 0) {
+ //
+ // Go through the fixed MTRR
+ //
+ for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
+ if (Address >= mMtrrLibFixedMtrrTable[Index].BaseAddress &&
+ Address < (
+ mMtrrLibFixedMtrrTable[Index].BaseAddress +
+ (mMtrrLibFixedMtrrTable[Index].Length * 8)
+ )
+ ) {
+ SubIndex =
+ ((UINTN)Address - mMtrrLibFixedMtrrTable[Index].BaseAddress) /
+ mMtrrLibFixedMtrrTable[Index].Length;
+ TempQword = AsmReadMsr64 (mMtrrLibFixedMtrrTable[Index].Msr);
+ MtrrType = RShiftU64 (TempQword, SubIndex * 8) & 0xFF;
+ return GetMemoryCacheTypeFromMtrrType (MtrrType);
+ }
+ }
+ }
+ }
+ MtrrLibInitializeMtrrMask(&MtrrValidBitsMask, &MtrrValidAddressMask);
+ MtrrGetMemoryAttributeInVariableMtrr(
+ MtrrValidBitsMask,
+ MtrrValidAddressMask,
+ VariableMtrr
+ );
+
+ //
+ // Go through the variable MTRR
+ //
+ VariableMtrrCount = GetVariableMtrrCount ();
+ ASSERT (VariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);
+
+ for (Index = 0; Index < VariableMtrrCount; Index++) {
+ if (VariableMtrr[Index].Valid) {
+ if (Address >= VariableMtrr[Index].BaseAddress &&
+ Address < VariableMtrr[Index].BaseAddress+VariableMtrr[Index].Length) {
+ TempMtrrType = VariableMtrr[Index].Type;
+ MtrrType = MtrrPrecedence (MtrrType, TempMtrrType);
+ }
+ }
+ }
+ CacheType = GetMemoryCacheTypeFromMtrrType (MtrrType);
+
+ return CacheType;
+}
+
+
+
+/**
+ This function prints all MTRRs for debugging.
+**/
+VOID
+EFIAPI
+MtrrDebugPrintAllMtrrs (
+ VOID
+ )
+{
+ DEBUG_CODE (
+ MTRR_SETTINGS MtrrSettings;
+ UINTN Index;
+ UINTN Index1;
+ UINTN VariableMtrrCount;
+ UINT64 Base;
+ UINT64 Limit;
+ UINT64 MtrrBase;
+ UINT64 MtrrLimit;
+ UINT64 RangeBase;
+ UINT64 RangeLimit;
+ UINT64 NoRangeBase;
+ UINT64 NoRangeLimit;
+ UINT32 RegEax;
+ UINTN MemoryType;
+ UINTN PreviousMemoryType;
+ BOOLEAN Found;
+
+ if (!IsMtrrSupported ()) {
+ return;
+ }
+
+ DEBUG((DEBUG_CACHE, "MTRR Settings\n"));
+ DEBUG((DEBUG_CACHE, "=============\n"));
+
+ MtrrGetAllMtrrs (&MtrrSettings);
+ DEBUG((DEBUG_CACHE, "MTRR Default Type: %016lx\n", MtrrSettings.MtrrDefType));
+ for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
+ DEBUG((DEBUG_CACHE, "Fixed MTRR[%02d] : %016lx\n", Index, MtrrSettings.Fixed.Mtrr[Index]));
+ }
+
+ VariableMtrrCount = GetVariableMtrrCount ();
+ for (Index = 0; Index < VariableMtrrCount; Index++) {
+ DEBUG((DEBUG_CACHE, "Variable MTRR[%02d]: Base=%016lx Mask=%016lx\n",
+ Index,
+ MtrrSettings.Variables.Mtrr[Index].Base,
+ MtrrSettings.Variables.Mtrr[Index].Mask
+ ));
+ }
+ DEBUG((DEBUG_CACHE, "\n"));
+ DEBUG((DEBUG_CACHE, "MTRR Ranges\n"));
+ DEBUG((DEBUG_CACHE, "====================================\n"));
+
+ Base = 0;
+ PreviousMemoryType = MTRR_CACHE_INVALID_TYPE;
+ for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
+ Base = mMtrrLibFixedMtrrTable[Index].BaseAddress;
+ for (Index1 = 0; Index1 < 8; Index1++) {
+ MemoryType = (UINTN)(RShiftU64 (MtrrSettings.Fixed.Mtrr[Index], Index1 * 8) & 0xff);
+ if (MemoryType > CacheWriteBack) {
+ MemoryType = MTRR_CACHE_INVALID_TYPE;
+ }
+ if (MemoryType != PreviousMemoryType) {
+ if (PreviousMemoryType != MTRR_CACHE_INVALID_TYPE) {
+ DEBUG((DEBUG_CACHE, "%016lx\n", Base - 1));
+ }
+ PreviousMemoryType = MemoryType;
+ DEBUG((DEBUG_CACHE, "%a:%016lx-", mMtrrMemoryCacheTypeShortName[MemoryType], Base));
+ }
+ Base += mMtrrLibFixedMtrrTable[Index].Length;
+ }
+ }
+ DEBUG((DEBUG_CACHE, "%016lx\n", Base - 1));
+
+ VariableMtrrCount = GetVariableMtrrCount ();
+
+ Limit = BIT36 - 1;
+ AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
+ if (RegEax >= 0x80000008) {
+ AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL);
+ Limit = LShiftU64 (1, RegEax & 0xff) - 1;
+ }
+ Base = BASE_1MB;
+ PreviousMemoryType = MTRR_CACHE_INVALID_TYPE;
+ do {
+ MemoryType = MtrrGetMemoryAttribute (Base);
+ if (MemoryType > CacheWriteBack) {
+ MemoryType = MTRR_CACHE_INVALID_TYPE;
+ }
+
+ if (MemoryType != PreviousMemoryType) {
+ if (PreviousMemoryType != MTRR_CACHE_INVALID_TYPE) {
+ DEBUG((DEBUG_CACHE, "%016lx\n", Base - 1));
+ }
+ PreviousMemoryType = MemoryType;
+ DEBUG((DEBUG_CACHE, "%a:%016lx-", mMtrrMemoryCacheTypeShortName[MemoryType], Base));
+ }
+
+ RangeBase = BASE_1MB;
+ NoRangeBase = BASE_1MB;
+ RangeLimit = Limit;
+ NoRangeLimit = Limit;
+
+ for (Index = 0, Found = FALSE; Index < VariableMtrrCount; Index++) {
+ if ((MtrrSettings.Variables.Mtrr[Index].Mask & BIT11) == 0) {
+ //
+ // If mask is not valid, then do not display range
+ //
+ continue;
+ }
+ MtrrBase = (MtrrSettings.Variables.Mtrr[Index].Base & (~(SIZE_4KB - 1)));
+ MtrrLimit = MtrrBase + ((~(MtrrSettings.Variables.Mtrr[Index].Mask & (~(SIZE_4KB - 1)))) & Limit);
+
+ if (Base >= MtrrBase && Base < MtrrLimit) {
+ Found = TRUE;
+ }
+
+ if (Base >= MtrrBase && MtrrBase > RangeBase) {
+ RangeBase = MtrrBase;
+ }
+ if (Base > MtrrLimit && MtrrLimit > RangeBase) {
+ RangeBase = MtrrLimit + 1;
+ }
+ if (Base < MtrrBase && MtrrBase < RangeLimit) {
+ RangeLimit = MtrrBase - 1;
+ }
+ if (Base < MtrrLimit && MtrrLimit <= RangeLimit) {
+ RangeLimit = MtrrLimit;
+ }
+
+ if (Base > MtrrLimit && NoRangeBase < MtrrLimit) {
+ NoRangeBase = MtrrLimit + 1;
+ }
+ if (Base < MtrrBase && NoRangeLimit > MtrrBase) {
+ NoRangeLimit = MtrrBase - 1;
+ }
+ }
+
+ if (Found) {
+ Base = RangeLimit + 1;
+ } else {
+ Base = NoRangeLimit + 1;
+ }
+ } while (Base < Limit);
+ DEBUG((DEBUG_CACHE, "%016lx\n\n", Base - 1));
+ );
+}
/**
This function attempts to set the attributes for a memory range.
@@ -1236,155 +1575,6 @@ Done: return Status;
}
-
-
-/**
- This function will get the memory cache type of the specific address.
-
- This function is mainly for debug purpose.
-
- @param[in] Address The specific address
-
- @return Memory cache type of the specific address
-
-**/
-MTRR_MEMORY_CACHE_TYPE
-EFIAPI
-MtrrGetMemoryAttribute (
- IN PHYSICAL_ADDRESS Address
- )
-{
- UINT64 TempQword;
- UINTN Index;
- UINTN SubIndex;
- UINT64 MtrrType;
- UINT64 TempMtrrType;
- MTRR_MEMORY_CACHE_TYPE CacheType;
- VARIABLE_MTRR VariableMtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];
- UINT64 MtrrValidBitsMask;
- UINT64 MtrrValidAddressMask;
- UINTN VariableMtrrCount;
-
- if (!IsMtrrSupported ()) {
- return CacheUncacheable;
- }
-
- //
- // Check if MTRR is enabled, if not, return UC as attribute
- //
- TempQword = AsmReadMsr64 (MTRR_LIB_IA32_MTRR_DEF_TYPE);
- MtrrType = MTRR_CACHE_INVALID_TYPE;
-
- if ((TempQword & MTRR_LIB_CACHE_MTRR_ENABLED) == 0) {
- return CacheUncacheable;
- }
-
- //
- // If address is less than 1M, then try to go through the fixed MTRR
- //
- if (Address < BASE_1MB) {
- if ((TempQword & MTRR_LIB_CACHE_FIXED_MTRR_ENABLED) != 0) {
- //
- // Go through the fixed MTRR
- //
- for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
- if (Address >= mMtrrLibFixedMtrrTable[Index].BaseAddress &&
- Address < (
- mMtrrLibFixedMtrrTable[Index].BaseAddress +
- (mMtrrLibFixedMtrrTable[Index].Length * 8)
- )
- ) {
- SubIndex =
- ((UINTN)Address - mMtrrLibFixedMtrrTable[Index].BaseAddress) /
- mMtrrLibFixedMtrrTable[Index].Length;
- TempQword = AsmReadMsr64 (mMtrrLibFixedMtrrTable[Index].Msr);
- MtrrType = RShiftU64 (TempQword, SubIndex * 8) & 0xFF;
- return GetMemoryCacheTypeFromMtrrType (MtrrType);
- }
- }
- }
- }
- MtrrLibInitializeMtrrMask(&MtrrValidBitsMask, &MtrrValidAddressMask);
- MtrrGetMemoryAttributeInVariableMtrr(
- MtrrValidBitsMask,
- MtrrValidAddressMask,
- VariableMtrr
- );
-
- //
- // Go through the variable MTRR
- //
- VariableMtrrCount = GetVariableMtrrCount ();
- ASSERT (VariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);
-
- for (Index = 0; Index < VariableMtrrCount; Index++) {
- if (VariableMtrr[Index].Valid) {
- if (Address >= VariableMtrr[Index].BaseAddress &&
- Address < VariableMtrr[Index].BaseAddress+VariableMtrr[Index].Length) {
- TempMtrrType = VariableMtrr[Index].Type;
- MtrrType = MtrrPrecedence (MtrrType, TempMtrrType);
- }
- }
- }
- CacheType = GetMemoryCacheTypeFromMtrrType (MtrrType);
-
- return CacheType;
-}
-
-
-/**
- Worker function will get the raw value in variable MTRRs
-
- @param[out] VariableSettings A buffer to hold variable MTRRs content.
-
- @return The VariableSettings input pointer
-
-**/
-MTRR_VARIABLE_SETTINGS*
-MtrrGetVariableMtrrWorker (
- OUT MTRR_VARIABLE_SETTINGS *VariableSettings
- )
-{
- UINT32 Index;
- UINT32 VariableMtrrCount;
-
- VariableMtrrCount = GetVariableMtrrCount ();
- ASSERT (VariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);
-
- for (Index = 0; Index < VariableMtrrCount; Index++) {
- VariableSettings->Mtrr[Index].Base =
- AsmReadMsr64 (MTRR_LIB_IA32_VARIABLE_MTRR_BASE + (Index << 1));
- VariableSettings->Mtrr[Index].Mask =
- AsmReadMsr64 (MTRR_LIB_IA32_VARIABLE_MTRR_BASE + (Index << 1) + 1);
- }
-
- return VariableSettings;
-}
-
-/**
- This function will get the raw value in variable MTRRs
-
- @param[out] VariableSettings A buffer to hold variable MTRRs content.
-
- @return The VariableSettings input pointer
-
-**/
-MTRR_VARIABLE_SETTINGS*
-EFIAPI
-MtrrGetVariableMtrr (
- OUT MTRR_VARIABLE_SETTINGS *VariableSettings
- )
-{
- if (!IsMtrrSupported ()) {
- return VariableSettings;
- }
-
- return MtrrGetVariableMtrrWorker (
- VariableSettings
- );
-}
-
-
/**
Worker function setting variable MTRRs
@@ -1442,51 +1632,6 @@ MtrrSetVariableMtrr ( }
/**
- Worker function gets the content in fixed MTRRs
-
- @param[out] FixedSettings A buffer to hold fixed MTRRs content.
-
- @retval The pointer of FixedSettings
-
-**/
-MTRR_FIXED_SETTINGS*
-MtrrGetFixedMtrrWorker (
- OUT MTRR_FIXED_SETTINGS *FixedSettings
- )
-{
- UINT32 Index;
-
- for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
- FixedSettings->Mtrr[Index] =
- AsmReadMsr64 (mMtrrLibFixedMtrrTable[Index].Msr);
- }
-
- return FixedSettings;
-}
-
-
-/**
- This function gets the content in fixed MTRRs
-
- @param[out] FixedSettings A buffer to hold fixed MTRRs content.
-
- @retval The pointer of FixedSettings
-
-**/
-MTRR_FIXED_SETTINGS*
-EFIAPI
-MtrrGetFixedMtrr (
- OUT MTRR_FIXED_SETTINGS *FixedSettings
- )
-{
- if (!IsMtrrSupported ()) {
- return FixedSettings;
- }
-
- return MtrrGetFixedMtrrWorker (FixedSettings);
-}
-
-/**
Worker function setting fixed MTRRs
@param[in] FixedSettings A buffer to hold fixed Mtrrs content.
@@ -1616,153 +1761,6 @@ MtrrSetAllMtrrs ( }
/**
- This function prints all MTRRs for debugging.
-**/
-VOID
-EFIAPI
-MtrrDebugPrintAllMtrrs (
- VOID
- )
-{
- DEBUG_CODE (
- MTRR_SETTINGS MtrrSettings;
- UINTN Index;
- UINTN Index1;
- UINTN VariableMtrrCount;
- UINT64 Base;
- UINT64 Limit;
- UINT64 MtrrBase;
- UINT64 MtrrLimit;
- UINT64 RangeBase;
- UINT64 RangeLimit;
- UINT64 NoRangeBase;
- UINT64 NoRangeLimit;
- UINT32 RegEax;
- UINTN MemoryType;
- UINTN PreviousMemoryType;
- BOOLEAN Found;
-
- if (!IsMtrrSupported ()) {
- return;
- }
-
- DEBUG((DEBUG_CACHE, "MTRR Settings\n"));
- DEBUG((DEBUG_CACHE, "=============\n"));
-
- MtrrGetAllMtrrs (&MtrrSettings);
- DEBUG((DEBUG_CACHE, "MTRR Default Type: %016lx\n", MtrrSettings.MtrrDefType));
- for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
- DEBUG((DEBUG_CACHE, "Fixed MTRR[%02d] : %016lx\n", Index, MtrrSettings.Fixed.Mtrr[Index]));
- }
-
- VariableMtrrCount = GetVariableMtrrCount ();
- for (Index = 0; Index < VariableMtrrCount; Index++) {
- DEBUG((DEBUG_CACHE, "Variable MTRR[%02d]: Base=%016lx Mask=%016lx\n",
- Index,
- MtrrSettings.Variables.Mtrr[Index].Base,
- MtrrSettings.Variables.Mtrr[Index].Mask
- ));
- }
- DEBUG((DEBUG_CACHE, "\n"));
- DEBUG((DEBUG_CACHE, "MTRR Ranges\n"));
- DEBUG((DEBUG_CACHE, "====================================\n"));
-
- Base = 0;
- PreviousMemoryType = MTRR_CACHE_INVALID_TYPE;
- for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
- Base = mMtrrLibFixedMtrrTable[Index].BaseAddress;
- for (Index1 = 0; Index1 < 8; Index1++) {
- MemoryType = (UINTN)(RShiftU64 (MtrrSettings.Fixed.Mtrr[Index], Index1 * 8) & 0xff);
- if (MemoryType > CacheWriteBack) {
- MemoryType = MTRR_CACHE_INVALID_TYPE;
- }
- if (MemoryType != PreviousMemoryType) {
- if (PreviousMemoryType != MTRR_CACHE_INVALID_TYPE) {
- DEBUG((DEBUG_CACHE, "%016lx\n", Base - 1));
- }
- PreviousMemoryType = MemoryType;
- DEBUG((DEBUG_CACHE, "%a:%016lx-", mMtrrMemoryCacheTypeShortName[MemoryType], Base));
- }
- Base += mMtrrLibFixedMtrrTable[Index].Length;
- }
- }
- DEBUG((DEBUG_CACHE, "%016lx\n", Base - 1));
-
- VariableMtrrCount = GetVariableMtrrCount ();
-
- Limit = BIT36 - 1;
- AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
- if (RegEax >= 0x80000008) {
- AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL);
- Limit = LShiftU64 (1, RegEax & 0xff) - 1;
- }
- Base = BASE_1MB;
- PreviousMemoryType = MTRR_CACHE_INVALID_TYPE;
- do {
- MemoryType = MtrrGetMemoryAttribute (Base);
- if (MemoryType > CacheWriteBack) {
- MemoryType = MTRR_CACHE_INVALID_TYPE;
- }
-
- if (MemoryType != PreviousMemoryType) {
- if (PreviousMemoryType != MTRR_CACHE_INVALID_TYPE) {
- DEBUG((DEBUG_CACHE, "%016lx\n", Base - 1));
- }
- PreviousMemoryType = MemoryType;
- DEBUG((DEBUG_CACHE, "%a:%016lx-", mMtrrMemoryCacheTypeShortName[MemoryType], Base));
- }
-
- RangeBase = BASE_1MB;
- NoRangeBase = BASE_1MB;
- RangeLimit = Limit;
- NoRangeLimit = Limit;
-
- for (Index = 0, Found = FALSE; Index < VariableMtrrCount; Index++) {
- if ((MtrrSettings.Variables.Mtrr[Index].Mask & BIT11) == 0) {
- //
- // If mask is not valid, then do not display range
- //
- continue;
- }
- MtrrBase = (MtrrSettings.Variables.Mtrr[Index].Base & (~(SIZE_4KB - 1)));
- MtrrLimit = MtrrBase + ((~(MtrrSettings.Variables.Mtrr[Index].Mask & (~(SIZE_4KB - 1)))) & Limit);
-
- if (Base >= MtrrBase && Base < MtrrLimit) {
- Found = TRUE;
- }
-
- if (Base >= MtrrBase && MtrrBase > RangeBase) {
- RangeBase = MtrrBase;
- }
- if (Base > MtrrLimit && MtrrLimit > RangeBase) {
- RangeBase = MtrrLimit + 1;
- }
- if (Base < MtrrBase && MtrrBase < RangeLimit) {
- RangeLimit = MtrrBase - 1;
- }
- if (Base < MtrrLimit && MtrrLimit <= RangeLimit) {
- RangeLimit = MtrrLimit;
- }
-
- if (Base > MtrrLimit && NoRangeBase < MtrrLimit) {
- NoRangeBase = MtrrLimit + 1;
- }
- if (Base < MtrrBase && NoRangeLimit > MtrrBase) {
- NoRangeLimit = MtrrBase - 1;
- }
- }
-
- if (Found) {
- Base = RangeLimit + 1;
- } else {
- Base = NoRangeLimit + 1;
- }
- } while (Base < Limit);
- DEBUG((DEBUG_CACHE, "%016lx\n\n", Base - 1));
- );
-}
-
-/**
Checks if MTRR is supported.
@retval TRUE MTRR is supported.
|