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| author | YuanhaoXie <yuanhao.xie@intel.com> | 2023-09-11 18:41:34 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-10-09 08:22:02 +0000 |
| commit | 4b7b32f846edbd2970f5b7c34041c2abe9d0724e (patch) | |
| tree | c2e2dad82cc5f23a974de51ee4449e5d85f27294 /UefiCpuPkg/Include | |
| parent | c032db330805993bb29e4ff3d9daad160f3fb35e (diff) | |
| download | edk2-4b7b32f846edbd2970f5b7c34041c2abe9d0724e.tar.gz edk2-4b7b32f846edbd2970f5b7c34041c2abe9d0724e.tar.bz2 edk2-4b7b32f846edbd2970f5b7c34041c2abe9d0724e.zip | |
UefiCpuPkg/MtrrLib: Add API MtrrGetMemoryAttributesInMtrrSettings.
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.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Diffstat (limited to 'UefiCpuPkg/Include')
| -rw-r--r-- | UefiCpuPkg/Include/Library/MtrrLib.h | 23 |
1 files changed, 23 insertions, 0 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_
|