diff options
Diffstat (limited to 'UefiCpuPkg/Include')
| -rw-r--r-- | UefiCpuPkg/Include/Library/MtrrLib.h | 61 |
1 files changed, 49 insertions, 12 deletions
diff --git a/UefiCpuPkg/Include/Library/MtrrLib.h b/UefiCpuPkg/Include/Library/MtrrLib.h index e3ad1cde31..14453719bf 100644 --- a/UefiCpuPkg/Include/Library/MtrrLib.h +++ b/UefiCpuPkg/Include/Library/MtrrLib.h @@ -19,9 +19,19 @@ // According to IA32 SDM, MTRRs number and msr offset are always consistent
// for IA32 processor family
//
-#define MTRR_NUMBER_OF_VARIABLE_MTRR 8
+
+//
+// We can not use Pcd as macro to define structure, so we have to define MAX_MTRR_NUMBER_OF_VARIABLE_MTRR
+//
+#define MAX_MTRR_NUMBER_OF_VARIABLE_MTRR 32
+//
+// Firmware need reserve 2 MTRR for OS
+//
+#define RESERVED_FIRMWARE_VARIABLE_MTRR_NUMBER 2
+
#define MTRR_NUMBER_OF_FIXED_MTRR 11
-#define FIRMWARE_VARIABLE_MTRR_NUMBER 6
+#define MTRR_LIB_IA32_MTRR_CAP 0x0FE
+#define MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK 0x0FF
#define MTRR_LIB_IA32_MTRR_FIX64K_00000 0x250
#define MTRR_LIB_IA32_MTRR_FIX16K_80000 0x258
#define MTRR_LIB_IA32_MTRR_FIX16K_A0000 0x259
@@ -34,7 +44,6 @@ #define MTRR_LIB_IA32_MTRR_FIX4K_F0000 0x26E
#define MTRR_LIB_IA32_MTRR_FIX4K_F8000 0x26F
#define MTRR_LIB_IA32_VARIABLE_MTRR_BASE 0x200
-#define MTRR_LIB_IA32_VARIABLE_MTRR_END 0x20F
#define MTRR_LIB_IA32_MTRR_DEF_TYPE 0x2FF
#define MTRR_LIB_MSR_VALID_MASK 0xFFFFFFFFFULL
#define MTRR_LIB_CACHE_VALID_ADDRESS 0xFFFFFF000ULL
@@ -74,7 +83,7 @@ typedef struct _MTRR_VARIABLE_SETTING_ { // Array for variable MTRRs
//
typedef struct _MTRR_VARIABLE_SETTINGS_ {
- MTRR_VARIABLE_SETTING Mtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];
+ MTRR_VARIABLE_SETTING Mtrr[MAX_MTRR_NUMBER_OF_VARIABLE_MTRR];
} MTRR_VARIABLE_SETTINGS;
//
@@ -112,6 +121,28 @@ typedef enum { #define MTRR_CACHE_INVALID_TYPE 7
/**
+ Returns the variable MTRR count for the CPU.
+
+ @return Variable MTRR count
+
+**/
+UINT32
+GetVariableMtrrCount (
+ VOID
+ );
+
+/**
+ Returns the firmware usable variable MTRR count for the CPU.
+
+ @return Firmware usable variable MTRR count
+
+**/
+UINT32
+GetFirmwareVariableMtrrCount (
+ VOID
+ );
+
+/**
This function attempts to set the attributes for a memory range.
@param BaseAddress The physical address that is the start address of a memory region.
@@ -251,19 +282,25 @@ MtrrSetAllMtrrs ( This function shadows the content of variable MTRRs into
an internal array: VariableMtrr
- @param MtrrValidBitsMask The mask for the valid bit of the MTRR
- @param MtrrValidAddressMask The valid address mask for MTRR since the base address in
- MTRR must align to 4K, so valid address mask equal to
- MtrrValidBitsMask & 0xfffffffffffff000ULL
- @param VariableMtrr The array to shadow variable MTRRs content
- @return The ruturn value of this paramter indicates the number of
- MTRRs which has been used.
+ @param MtrrValidBitsMask The mask for the valid bit of the MTRR
+ @param MtrrValidAddressMask The valid address mask for MTRR since the base address in
+ MTRR must align to 4K, so valid address mask equal to
+ MtrrValidBitsMask & 0xfffffffffffff000ULL
+ @param VariableMtrrCount On input, it means the array number of variable MTRRs passed in.
+ On output, it means the number of MTRRs which has been used if EFI_SUCCESS,
+ or the number of MTRR required if BUFFER_TOO_SMALL.
+ @param VariableMtrr The array to shadow variable MTRRs content
+
+ @retval RETURN_SUCCESS The variable MTRRs are returned.
+ @retval RETURN_BUFFER_TOO_SMALL The input buffer is too small to hold the variable MTRRs.
+
**/
-UINT32
+RETURN_STATUS
EFIAPI
MtrrGetMemoryAttributeInVariableMtrr (
IN UINT64 MtrrValidBitsMask,
IN UINT64 MtrrValidAddressMask,
+ IN OUT UINT32 *VariableMtrrCount,
OUT VARIABLE_MTRR *VariableMtrr
);
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