MtrrGetMemoryAttributesInMtrrSettings parses the MTRR settings
either from hardware or from the parameter and returns an
array containing the memory cache types of all memory addresses.
This API could elinimate the needs of following APIs:
1. MtrrGetMemoryAttributeInVariableMtr
2. MtrrGetFixedMtrr
Signed-off-by: Ray Ni <ray...@intel.com>
Cc: Eric Dong <eric.d...@intel.com>
Cc: Rahul Kumar <rahul1.ku...@intel.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
---
UefiCpuPkg/Include/Library/MtrrLib.h | 23 +++++++++++++++++++++++
UefiCpuPkg/Library/MtrrLib/MtrrLib.c | 117
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------
2 files changed, 130 insertions(+), 10 deletions(-)
diff --git a/UefiCpuPkg/Include/Library/MtrrLib.h
b/UefiCpuPkg/Include/Library/MtrrLib.h
index 94cf615901..86cc1aab3b 100644
--- a/UefiCpuPkg/Include/Library/MtrrLib.h
+++ b/UefiCpuPkg/Include/Library/MtrrLib.h
@@ -359,4 +359,27 @@ MtrrSetMemoryAttributesInMtrrSettings (
IN UINTN RangeCount
);
+/**
+ This function returns a Ranges array containing the memory cache types
+ of all memory addresses.
+
+ @param[in] MtrrSetting MTRR setting buffer to parse.
+ @param[out] Ranges Pointer to an array of MTRR_MEMORY_RANGE.
+ @param[in,out] RangeCount Count of MTRR_MEMORY_RANGE.
+ On input, the maximum entries the Ranges can
hold.
+ On output, the actual entries that the function
returns.
+
+ @retval RETURN_INVALID_PARAMETER RangeCount is NULL.
+ @retval RETURN_INVALID_PARAMETER *RangeCount is not 0 but Ranges is NULL.
+ @retval RETURN_BUFFER_TOO_SMALL *RangeCount is too small.
+ @retval RETURN_SUCCESS Ranges are successfully returned.
+**/
+RETURN_STATUS
+EFIAPI
+MtrrGetMemoryAttributesInMtrrSettings (
+ IN CONST MTRR_SETTINGS *MtrrSetting OPTIONAL,
+ OUT MTRR_MEMORY_RANGE *Ranges,
+ IN OUT UINTN *RangeCount
+ );
+
#endif // _MTRR_LIB_H_
diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
index 6ba0c9b37f..61c81c5139 100644
--- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
+++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c
@@ -292,7 +292,7 @@ GetFirmwareVariableMtrrCount (
**/
MTRR_MEMORY_CACHE_TYPE
MtrrGetDefaultMemoryTypeWorker (
- IN MTRR_SETTINGS *MtrrSetting
+ IN CONST MTRR_SETTINGS *MtrrSetting
)
{
MSR_IA32_MTRR_DEF_TYPE_REGISTER DefType;
@@ -689,11 +689,11 @@ MtrrGetMemoryAttributeInVariableMtrrWorker (
**/
UINT32
MtrrLibGetRawVariableRanges (
- IN MTRR_VARIABLE_SETTINGS *VariableSettings,
- IN UINTN VariableMtrrCount,
- IN UINT64 MtrrValidBitsMask,
- IN UINT64 MtrrValidAddressMask,
- OUT MTRR_MEMORY_RANGE *VariableMtrr
+ IN CONST MTRR_VARIABLE_SETTINGS *VariableSettings,
+ IN UINTN VariableMtrrCount,
+ IN UINT64 MtrrValidBitsMask,
+ IN UINT64 MtrrValidAddressMask,
+ OUT MTRR_MEMORY_RANGE *VariableMtrr
)
{
UINTN Index;
@@ -1823,10 +1823,10 @@ MtrrLibCalculateMtrrs (
**/
RETURN_STATUS
MtrrLibApplyFixedMtrrs (
- IN MTRR_FIXED_SETTINGS *Fixed,
- IN OUT MTRR_MEMORY_RANGE *Ranges,
- IN UINTN RangeCapacity,
- IN OUT UINTN *RangeCount
+ IN CONST MTRR_FIXED_SETTINGS *Fixed,
+ IN OUT MTRR_MEMORY_RANGE *Ranges,
+ IN UINTN RangeCapacity,
+ IN OUT UINTN *RangeCount
)
{
RETURN_STATUS Status;
@@ -2956,6 +2956,103 @@ IsMtrrSupported (
return MtrrLibIsMtrrSupported (NULL, NULL);
}
+/**
+ This function returns a Ranges array containing the memory cache types
+ of all memory addresses.
+
+ @param[in] MtrrSetting MTRR setting buffer to parse.
+ @param[out] Ranges Pointer to an array of MTRR_MEMORY_RANGE.
+ @param[in,out] RangeCount Count of MTRR_MEMORY_RANGE.
+ On input, the maximum entries the Ranges can
hold.
+ On output, the actual entries that the function
returns.
+
+ @retval RETURN_INVALID_PARAMETER RangeCount is NULL.
+ @retval RETURN_INVALID_PARAMETER *RangeCount is not 0 but Ranges is NULL.
+ @retval RETURN_BUFFER_TOO_SMALL *RangeCount is too small.
+ @retval RETURN_SUCCESS Ranges are successfully returned.
+**/
+RETURN_STATUS
+EFIAPI
+MtrrGetMemoryAttributesInMtrrSettings (
+ IN CONST MTRR_SETTINGS *MtrrSetting OPTIONAL,
+ OUT MTRR_MEMORY_RANGE *Ranges,
+ IN OUT UINTN *RangeCount
+ )
+{
+ RETURN_STATUS Status;
+ MTRR_SETTINGS LocalMtrrs;
+ CONST MTRR_SETTINGS *Mtrrs;
+ MSR_IA32_MTRR_DEF_TYPE_REGISTER *MtrrDefType;
+ UINTN LocalRangeCount;
+ UINT64 MtrrValidBitsMask;
+ UINT64 MtrrValidAddressMask;
+ UINT32 VariableMtrrCount;
+ MTRR_MEMORY_RANGE RawVariableRanges[ARRAY_SIZE
(Mtrrs->Variables.Mtrr)];
+ MTRR_MEMORY_RANGE LocalRanges[
+ ARRAY_SIZE
(mMtrrLibFixedMtrrTable) * sizeof (UINT64) + 2 * ARRAY_SIZE
(Mtrrs->Variables.Mtrr) + 1
+ ];
+
+ if (RangeCount == NULL) {
+ return RETURN_INVALID_PARAMETER;
+ }
+
+ if ((*RangeCount != 0) && (Ranges == NULL)) {
+ return RETURN_INVALID_PARAMETER;
+ }
+
+ if (MtrrSetting != NULL) {
+ Mtrrs = MtrrSetting;
+ } else {
+ MtrrGetAllMtrrs (&LocalMtrrs);
+ Mtrrs = &LocalMtrrs;
+ }
+
+ MtrrDefType = (MSR_IA32_MTRR_DEF_TYPE_REGISTER *)&Mtrrs->MtrrDefType;
+
+ LocalRangeCount = 1;
+ MtrrLibInitializeMtrrMask (&MtrrValidBitsMask, &MtrrValidAddressMask);
+ LocalRanges[0].BaseAddress = 0;
+ LocalRanges[0].Length = MtrrValidBitsMask + 1;
+
+ if (MtrrDefType->Bits.E == 0) {
+ LocalRanges[0].Type = CacheUncacheable;
+ } else {
+ LocalRanges[0].Type = MtrrGetDefaultMemoryTypeWorker (Mtrrs);
+
+ VariableMtrrCount = GetVariableMtrrCountWorker ();
+ ASSERT (VariableMtrrCount <= ARRAY_SIZE (MtrrSetting->Variables.Mtrr));
+
+ MtrrLibGetRawVariableRanges (
+ &Mtrrs->Variables,
+ VariableMtrrCount,
+ MtrrValidBitsMask,
+ MtrrValidAddressMask,
+ RawVariableRanges
+ );
+ Status = MtrrLibApplyVariableMtrrs (
+ RawVariableRanges,
+ VariableMtrrCount,
+ LocalRanges,
+ ARRAY_SIZE (LocalRanges),
+ &LocalRangeCount
+ );
+ ASSERT_RETURN_ERROR (Status);
+
+ if (MtrrDefType->Bits.FE == 1) {
+ MtrrLibApplyFixedMtrrs (&Mtrrs->Fixed, LocalRanges, ARRAY_SIZE
(LocalRanges), &LocalRangeCount);
+ }
+ }
+
+ if (*RangeCount < LocalRangeCount) {
+ *RangeCount = LocalRangeCount;
+ return RETURN_BUFFER_TOO_SMALL;
+ }
+
+ CopyMem (Ranges, LocalRanges, LocalRangeCount * sizeof (LocalRanges[0]));
+ *RangeCount = LocalRangeCount;
+ return RETURN_SUCCESS;
+}
+
/**
Worker function prints all MTRRs for debugging.
--
2.36.1.windows.1
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