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PrmPkg/PrmSampleHardwareAccessModule: Add non-print PRM handlers 

For each PRM handler that is currently present, a corresponding PRM
handler is added that does not print. This allows a caller to execute
a sample hardware access PRM handler without requiring that caller to
provide a debug print service.

Cc: Andrew Fish <afish@apple.com>
Cc: Kang Gao <kang.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Liu Yun <yun.y.liu@intel.com>
Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Liming Gao <gaoliming@byosoft.com.cn>
Acked-by: Leif Lindholm <quic_llindhol@quicinc.com>
Reviewed-by: Ankit Sinha <ankit.sinha@intel.com>
This commit is contained in:
Michael Kubacki 2020-06-10 16:28:30 -07:00 committed by mergify[bot]
parent c1a7a50f67
commit 4c8486fd72
1 changed files with 240 additions and 129 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

369
PrmPkg/Samples/PrmSampleHardwareAccessModule/PrmSampleHardwareAccessModule.c
View File

@ -27,12 +27,21 @@
// {2120cd3c-848b-4d8f-abbb-4b74ce64ac89}
#define MSR_ACCESS_MICROCODE_SIGNATURE_PRM_HANDLER_GUID {0x2120cd3c, 0x848b, 0x4d8f, {0xab, 0xbb, 0x4b, 0x74, 0xce, 0x64, 0xac, 0x89}}
// {5d28b4e7-3867-4aee-aa09-51fc282c3b22}
#define MSR_PRINT_MICROCODE_SIGNATURE_PRM_HANDLER_GUID {0x5d28b4e7, 0x3867, 0x4aee, {0xaa, 0x09, 0x51, 0xfc, 0x28, 0x2c, 0x3b, 0x22}}
// {ea0935a7-506b-4159-bbbb-48deeecb6f58}
#define MSR_ACCESS_MTRR_DUMP_PRM_HANDLER_GUID {0xea0935a7, 0x506b, 0x4159, {0xbb, 0xbb, 0x48, 0xde, 0xee, 0xcb, 0x6f, 0x58}}
// {4b64b702-4d2b-4dfe-ac5a-0b4110a2ca47}
#define MSR_PRINT_MTRR_DUMP_PRM_HANDLER_GUID {0x4b64b702, 0x4d2b, 0x4dfe, {0xac, 0x5a, 0x0b, 0x41, 0x10, 0xa2, 0xca, 0x47}}
// {1bd1bda9-909a-4614-9699-25ec0c2783f7}
#define MMIO_ACCESS_HPET_PRM_HANDLER_GUID {0x1bd1bda9, 0x909a, 0x4614, {0x96, 0x99, 0x25, 0xec, 0x0c, 0x27, 0x83, 0xf7}}
// {8a0efdde-78d0-45f0-aea0-c28245c7e1db}
#define MMIO_PRINT_HPET_PRM_HANDLER_GUID {0x8a0efdde, 0x78d0, 0x45f0, {0xae, 0xa0, 0xc2, 0x82, 0x45, 0xc7, 0xe1, 0xdb}}
#define HPET_BASE_ADDRESS 0xFED00000
//
@ -124,13 +133,18 @@ MtrrLibApplyVariableMtrrs (
//
/**
Prints all MTRR values including architectural and variable MTTRs.
Accesses MTRR values including architectural and variable MTRRs.
If the optional OsServiceDebugPrint function pointer is provided that function is
used to print the MTRR settings.
@param[in] OsServiceDebugPrint A pointer to an OS-provided debug print function.
**/
VOID
EFIAPI
PrintAllMtrrs (
IN PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint
AccessAllMtrrs (
IN PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint OPTIONAL
)
{
MTRR_SETTINGS LocalMtrrs;
@ -148,7 +162,7 @@ PrintAllMtrrs (
];
MTRR_MEMORY_RANGE RawVariableRanges[ARRAY_SIZE (Mtrrs->Variables.Mtrr)];
if (OsServiceDebugPrint == NULL || !IsMtrrSupported ()) {
if (!IsMtrrSupported ()) {
return;
}
@ -160,56 +174,63 @@ PrintAllMtrrs (
//
// Dump RAW MTRR contents
//
OsServiceDebugPrint (" MTRR Settings:\n");
OsServiceDebugPrint (" =============\n");
if (OsServiceDebugPrint != NULL) {
OsServiceDebugPrint (" MTRR Settings:\n");
OsServiceDebugPrint (" =============\n");
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" MTRR Default Type: %016lx\n",
Mtrrs->MtrrDefType
);
OsServiceDebugPrint (&DebugMessage[0]);
for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" Fixed MTRR[%02d] : %016lx\n",
Index,
Mtrrs->Fixed.Mtrr[Index]
" MTRR Default Type: %016lx\n",
Mtrrs->MtrrDefType
);
OsServiceDebugPrint (&DebugMessage[0]);
}
ContainVariableMtrr = FALSE;
for (Index = 0; Index < VariableMtrrCount; Index++) {
if ((Mtrrs->Variables.Mtrr[Index].Mask & BIT11) == 0) {
//
// If mask is not valid, then do not display range
//
continue;
if (OsServiceDebugPrint != NULL) {
for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" Fixed MTRR[%02d] : %016lx\n",
Index,
Mtrrs->Fixed.Mtrr[Index]
);
OsServiceDebugPrint (&DebugMessage[0]);
}
ContainVariableMtrr = FALSE;
for (Index = 0; Index < VariableMtrrCount; Index++) {
if ((Mtrrs->Variables.Mtrr[Index].Mask & BIT11) == 0) {
//
// If mask is not valid, then do not display range
//
continue;
}
ContainVariableMtrr = TRUE;
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" Variable MTRR[%02d]: Base=%016lx Mask=%016lx\n",
Index,
Mtrrs->Variables.Mtrr[Index].Base,
Mtrrs->Variables.Mtrr[Index].Mask
);
OsServiceDebugPrint (&DebugMessage[0]);
}
ContainVariableMtrr = TRUE;
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" Variable MTRR[%02d]: Base=%016lx Mask=%016lx\n",
Index,
Mtrrs->Variables.Mtrr[Index].Base,
Mtrrs->Variables.Mtrr[Index].Mask
);
OsServiceDebugPrint (&DebugMessage[0]);
if (!ContainVariableMtrr) {
OsServiceDebugPrint (" Variable MTRR : None.\n");
}
OsServiceDebugPrint ("\n");
}
if (!ContainVariableMtrr) {
OsServiceDebugPrint (" Variable MTRR : None.\n");
}
OsServiceDebugPrint ("\n");
//
// Dump MTRR setting in ranges
//
OsServiceDebugPrint (" Memory Ranges:\n");
OsServiceDebugPrint (" ====================================\n");
if (OsServiceDebugPrint != NULL) {
OsServiceDebugPrint (" Memory Ranges:\n");
OsServiceDebugPrint (" ====================================\n");
}
MtrrLibInitializeMtrrMask (&MtrrValidBitsMask, &MtrrValidAddressMask);
Ranges[0].BaseAddress = 0;
Ranges[0].Length = MtrrValidBitsMask + 1;
@ -227,15 +248,17 @@ PrintAllMtrrs (
MtrrLibApplyFixedMtrrs (&Mtrrs->Fixed, Ranges, ARRAY_SIZE (Ranges), &RangeCount);
for (Index = 0; Index < RangeCount; Index++) {
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" %a:%016lx-%016lx\n",
mMtrrMemoryCacheTypeShortName[Ranges[Index].Type],
Ranges[Index].BaseAddress, Ranges[Index].BaseAddress + Ranges[Index].Length - 1
);
OsServiceDebugPrint (&DebugMessage[0]);
if (OsServiceDebugPrint != NULL) {
for (Index = 0; Index < RangeCount; Index++) {
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" %a:%016lx-%016lx\n",
mMtrrMemoryCacheTypeShortName[Ranges[Index].Type],
Ranges[Index].BaseAddress, Ranges[Index].BaseAddress + Ranges[Index].Length - 1
);
OsServiceDebugPrint (&DebugMessage[0]);
}
}
}
@ -277,12 +300,17 @@ HpetRead (
}
/**
Prints HPET configuration information.
Accesses HPET configuration information.
If the optional OsServiceDebugPrint function pointer is provided that function is
used to print HPET settings.
@param[in] OsServiceDebugPrint A pointer to an OS-provided debug print function
**/
VOID
EFIAPI
PrintHpetConfiguration (
AccessHpetConfiguration (
IN PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint
)
{
@ -291,91 +319,108 @@ PrintHpetConfiguration (
HPET_GENERAL_CONFIGURATION_REGISTER HpetGeneralConfiguration;
CHAR8 DebugMessage[256];
if (OsServiceDebugPrint == NULL) {
return;
}
HpetGeneralCapabilities.Uint64 = HpetRead (HPET_GENERAL_CAPABILITIES_ID_OFFSET);
HpetGeneralConfiguration.Uint64 = HpetRead (HPET_GENERAL_CONFIGURATION_OFFSET);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET Base Address = 0x%08x\n",
HPET_BASE_ADDRESS
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_GENERAL_CAPABILITIES_ID = 0x%016lx\n",
HpetGeneralCapabilities
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_GENERAL_CONFIGURATION = 0x%016lx\n",
HpetGeneralConfiguration.Uint64
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_GENERAL_INTERRUPT_STATUS = 0x%016lx\n",
HpetRead (HPET_GENERAL_INTERRUPT_STATUS_OFFSET)
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_MAIN_COUNTER = 0x%016lx\n",
HpetRead (HPET_MAIN_COUNTER_OFFSET)
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET Main Counter Period = %d (fs)\n",
HpetGeneralCapabilities.Bits.CounterClockPeriod
);
OsServiceDebugPrint (&DebugMessage[0]);
for (TimerIndex = 0; TimerIndex <= HpetGeneralCapabilities.Bits.NumberOfTimers; TimerIndex++) {
if (OsServiceDebugPrint != NULL) {
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_TIMER%d_CONFIGURATION = 0x%016lx\n",
TimerIndex,
HpetRead (HPET_TIMER_CONFIGURATION_OFFSET + TimerIndex * HPET_TIMER_STRIDE)
" HPET Base Address = 0x%08x\n",
HPET_BASE_ADDRESS
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_TIMER%d_COMPARATOR = 0x%016lx\n",
TimerIndex,
HpetRead (HPET_TIMER_COMPARATOR_OFFSET + TimerIndex * HPET_TIMER_STRIDE)
" HPET_GENERAL_CAPABILITIES_ID = 0x%016lx\n",
HpetGeneralCapabilities
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_TIMER%d_MSI_ROUTE = 0x%016lx\n",
TimerIndex,
HpetRead (HPET_TIMER_MSI_ROUTE_OFFSET + TimerIndex * HPET_TIMER_STRIDE)
" HPET_GENERAL_CONFIGURATION = 0x%016lx\n",
HpetGeneralConfiguration.Uint64
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_GENERAL_INTERRUPT_STATUS = 0x%016lx\n",
HpetRead (HPET_GENERAL_INTERRUPT_STATUS_OFFSET)
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_MAIN_COUNTER = 0x%016lx\n",
HpetRead (HPET_MAIN_COUNTER_OFFSET)
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET Main Counter Period = %d (fs)\n",
HpetGeneralCapabilities.Bits.CounterClockPeriod
);
OsServiceDebugPrint (&DebugMessage[0]);
for (TimerIndex = 0; TimerIndex <= HpetGeneralCapabilities.Bits.NumberOfTimers; TimerIndex++) {
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_TIMER%d_CONFIGURATION = 0x%016lx\n",
TimerIndex,
HpetRead (HPET_TIMER_CONFIGURATION_OFFSET + TimerIndex * HPET_TIMER_STRIDE)
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_TIMER%d_COMPARATOR = 0x%016lx\n",
TimerIndex,
HpetRead (HPET_TIMER_COMPARATOR_OFFSET + TimerIndex * HPET_TIMER_STRIDE)
);
OsServiceDebugPrint (&DebugMessage[0]);
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" HPET_TIMER%d_MSI_ROUTE = 0x%016lx\n",
TimerIndex,
HpetRead (HPET_TIMER_MSI_ROUTE_OFFSET + TimerIndex * HPET_TIMER_STRIDE)
);
OsServiceDebugPrint (&DebugMessage[0]);
}
}
}
/**
Reads the microcode signature from architectural MSR 0x8B.
@retval MicrocodeSignature The microcode signature value.
**/
UINT32
GetMicrocodeSignature (
VOID
)
{
MSR_IA32_BIOS_SIGN_ID_REGISTER BiosSignIdMsr;
AsmWriteMsr64 (MSR_IA32_BIOS_SIGN_ID, 0);
AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, NULL);
BiosSignIdMsr.Uint64 = AsmReadMsr64 (MSR_IA32_BIOS_SIGN_ID);
return BiosSignIdMsr.Bits.MicrocodeUpdateSignature;
}
/**
Prints the microcode update signature as read from architectural MSR 0x8B.
@ -386,26 +431,50 @@ PrintMicrocodeUpdateSignature (
IN PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint
)
{
MSR_IA32_BIOS_SIGN_ID_REGISTER BiosSignIdMsr;
UINT32 MicrocodeSignature;
CHAR8 DebugMessage[256];
if (OsServiceDebugPrint == NULL) {
return;
}
AsmWriteMsr64 (MSR_IA32_BIOS_SIGN_ID, 0);
AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, NULL);
BiosSignIdMsr.Uint64 = AsmReadMsr64 (MSR_IA32_BIOS_SIGN_ID);
MicrocodeSignature = GetMicrocodeSignature ();
AsciiSPrint (
&DebugMessage[0],
ARRAY_SIZE (DebugMessage),
" Signature read = 0x%x.\n",
BiosSignIdMsr.Bits.MicrocodeUpdateSignature
MicrocodeSignature
);
OsServiceDebugPrint (&DebugMessage[0]);
}
/**
A sample Platform Runtime Mechanism (PRM) handler.
This sample handler attempts to read the microcode update signature.
@param[in] ParameterBuffer A pointer to the PRM handler parameter buffer
@param[in] ContextBUffer A pointer to the PRM handler context buffer
@retval EFI_STATUS The PRM handler executed successfully.
@retval Others An error occurred in the PRM handler.
**/
PRM_HANDLER_EXPORT (MsrAccessMicrocodeSignaturePrmHandler)
{
UINT32 MicrocodeSignature;
MicrocodeSignature = 0;
MicrocodeSignature = GetMicrocodeSignature ();
if (MicrocodeSignature == 0) {
return EFI_NOT_FOUND;
}
return EFI_SUCCESS;
}
/**
A sample Platform Runtime Mechanism (PRM) handler.
@ -418,7 +487,7 @@ PrintMicrocodeUpdateSignature (
@retval Others An error occurred in the PRM handler.
**/
PRM_HANDLER_EXPORT (MsrAccessMicrocodeSignaturePrmHandler)
PRM_HANDLER_EXPORT (MsrPrintMicrocodeSignaturePrmHandler)
{
PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint;
@ -426,7 +495,7 @@ PRM_HANDLER_EXPORT (MsrAccessMicrocodeSignaturePrmHandler)
return EFI_INVALID_PARAMETER;
}
// In the POC, the OS debug print service is assumed to be at the beginning of ParameterBuffer
// The OS debug print service is assumed to be at the beginning of ParameterBuffer
OsServiceDebugPrint = *((PRM_OS_SERVICE_DEBUG_PRINT *) ParameterBuffer);
if (OsServiceDebugPrint == NULL) {
return EFI_INVALID_PARAMETER;
@ -443,7 +512,7 @@ PRM_HANDLER_EXPORT (MsrAccessMicrocodeSignaturePrmHandler)
/**
A sample Platform Runtime Mechanism (PRM) handler.
This sample handler attempts to read the current MTRR settings and print the result to a debug message.
This sample handler attempts to read the current MTRR settings.
@param[in] ParameterBuffer A pointer to the PRM handler parameter buffer
@param[in] ContextBUffer A pointer to the PRM handler context buffer
@ -453,6 +522,25 @@ PRM_HANDLER_EXPORT (MsrAccessMicrocodeSignaturePrmHandler)
**/
PRM_HANDLER_EXPORT (MsrAccessMtrrDumpPrmHandler)
{
AccessAllMtrrs (NULL);
return EFI_SUCCESS;
}
/**
A sample Platform Runtime Mechanism (PRM) handler.
This sample handler attempts to read the current MTRR settings and print the result to a debug message.
@param[in] ParameterBuffer A pointer to the PRM handler parameter buffer
@param[in] ContextBUffer A pointer to the PRM handler context buffer
@retval EFI_STATUS The PRM handler executed successfully.
@retval Others An error occurred in the PRM handler.
**/
PRM_HANDLER_EXPORT (MsrPrintMtrrDumpPrmHandler)
{
PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint;
@ -468,12 +556,32 @@ PRM_HANDLER_EXPORT (MsrAccessMtrrDumpPrmHandler)
OsServiceDebugPrint ("Hardware Access MsrAccessMtrrDumpPrmHandler entry.\n");
OsServiceDebugPrint (" Attempting to dump MTRR values:\n");
PrintAllMtrrs (OsServiceDebugPrint);
AccessAllMtrrs (OsServiceDebugPrint);
OsServiceDebugPrint ("Hardware Access MsrAccessMtrrDumpPrmHandler exit.\n");
return EFI_SUCCESS;
}
/**
A sample Platform Runtime Mechanism (PRM) handler.
This sample handler attempts to read from a HPET MMIO resource.
@param[in] ParameterBuffer A pointer to the PRM handler parameter buffer
@param[in] ContextBUffer A pointer to the PRM handler context buffer
@retval EFI_STATUS The PRM handler executed successfully.
@retval Others An error occurred in the PRM handler.
**/
PRM_HANDLER_EXPORT (MmioAccessHpetPrmHandler)
{
AccessHpetConfiguration (NULL);
return EFI_SUCCESS;
}
/**
A sample Platform Runtime Mechanism (PRM) handler.
@ -486,7 +594,7 @@ PRM_HANDLER_EXPORT (MsrAccessMtrrDumpPrmHandler)
@retval Others An error occurred in the PRM handler.
**/
PRM_HANDLER_EXPORT (MmioAccessHpetPrmHandler)
PRM_HANDLER_EXPORT (MmioPrintHpetPrmHandler)
{
PRM_OS_SERVICE_DEBUG_PRINT OsServiceDebugPrint;
@ -494,16 +602,16 @@ PRM_HANDLER_EXPORT (MmioAccessHpetPrmHandler)
return EFI_INVALID_PARAMETER;
}
// In the POC, the OS debug print service is assumed to be at the beginning of ParameterBuffer
// An OS debug print service is assumed to be at the beginning of ParameterBuffer
OsServiceDebugPrint = *((PRM_OS_SERVICE_DEBUG_PRINT *) ParameterBuffer);
if (OsServiceDebugPrint == NULL) {
return EFI_INVALID_PARAMETER;
}
OsServiceDebugPrint ("Hardware Access MmioAccessHpetPrmHandler entry.\n");
OsServiceDebugPrint ("Hardware Access MmioPrintHpetPrmHandler entry.\n");
OsServiceDebugPrint (" Attempting to read HPET configuration...\n");
PrintHpetConfiguration (OsServiceDebugPrint);
OsServiceDebugPrint ("Hardware Access MmioAccessHpetPrmHandler exit.\n");
AccessHpetConfiguration (OsServiceDebugPrint);
OsServiceDebugPrint ("Hardware Access MmioPrintHpetPrmHandler exit.\n");
return EFI_SUCCESS;
}
@ -514,7 +622,10 @@ PRM_HANDLER_EXPORT (MmioAccessHpetPrmHandler)
PRM_MODULE_EXPORT (
PRM_HANDLER_EXPORT_ENTRY (MSR_ACCESS_MICROCODE_SIGNATURE_PRM_HANDLER_GUID, MsrAccessMicrocodeSignaturePrmHandler),
PRM_HANDLER_EXPORT_ENTRY (MSR_ACCESS_MTRR_DUMP_PRM_HANDLER_GUID, MsrAccessMtrrDumpPrmHandler),
PRM_HANDLER_EXPORT_ENTRY (MMIO_ACCESS_HPET_PRM_HANDLER_GUID, MmioAccessHpetPrmHandler)
PRM_HANDLER_EXPORT_ENTRY (MMIO_ACCESS_HPET_PRM_HANDLER_GUID, MmioAccessHpetPrmHandler),
PRM_HANDLER_EXPORT_ENTRY (MSR_PRINT_MICROCODE_SIGNATURE_PRM_HANDLER_GUID, MsrPrintMicrocodeSignaturePrmHandler),
PRM_HANDLER_EXPORT_ENTRY (MSR_PRINT_MTRR_DUMP_PRM_HANDLER_GUID, MsrPrintMtrrDumpPrmHandler),
PRM_HANDLER_EXPORT_ENTRY (MMIO_PRINT_HPET_PRM_HANDLER_GUID, MmioPrintHpetPrmHandler)
);
/**