mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-02 13:03:28 +01:00
91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
|
/** @file
|
||
|
|
LimitCpuidMaxval Feature.
|
||
|
|
|
||
|
|
Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#include "CpuCommonFeatures.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
Detects if LimitCpuidMaxval feature supported on current processor.
|
||
|
|
|
||
|
|
@param[in] ProcessorNumber The index of the CPU executing this function.
|
||
|
|
@param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION
|
||
|
|
structure for the CPU executing this function.
|
||
|
|
@param[in] ConfigData A pointer to the configuration buffer returned
|
||
|
|
by CPU_FEATURE_GET_CONFIG_DATA. NULL if
|
||
|
|
CPU_FEATURE_GET_CONFIG_DATA was not provided in
|
||
|
|
RegisterCpuFeature().
|
||
|
|
|
||
|
|
@retval TRUE LimitCpuidMaxval feature is supported.
|
||
|
|
@retval FALSE LimitCpuidMaxval feature is not supported.
|
||
|
|
|
||
|
|
@note This service could be called by BSP/APs.
|
||
|
|
**/
|
||
|
|
BOOLEAN
|
||
|
|
EFIAPI
|
||
|
|
LimitCpuidMaxvalSupport (
|
||
|
|
IN UINTN ProcessorNumber,
|
||
|
|
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
|
||
|
|
IN VOID *ConfigData OPTIONAL
|
||
|
|
)
|
||
|
|
{
|
||
|
|
UINT32 Eax;
|
||
|
|
|
||
|
|
AsmCpuid (CPUID_SIGNATURE, &Eax, NULL, NULL, NULL);
|
||
|
|
return (Eax > 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Initializes LimitCpuidMaxval feature to specific state.
|
||
|
|
|
||
|
|
@param[in] ProcessorNumber The index of the CPU executing this function.
|
||
|
|
@param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION
|
||
|
|
structure for the CPU executing this function.
|
||
|
|
@param[in] ConfigData A pointer to the configuration buffer returned
|
||
|
|
by CPU_FEATURE_GET_CONFIG_DATA. NULL if
|
||
|
|
CPU_FEATURE_GET_CONFIG_DATA was not provided in
|
||
|
|
RegisterCpuFeature().
|
||
|
|
@param[in] State If TRUE, then the LimitCpuidMaxval feature must be enabled.
|
||
|
|
If FALSE, then the LimitCpuidMaxval feature must be disabled.
|
||
|
|
|
||
|
|
@retval RETURN_SUCCESS LimitCpuidMaxval feature is initialized.
|
||
|
|
|
||
|
|
@note This service could be called by BSP only.
|
||
|
|
**/
|
||
|
|
RETURN_STATUS
|
||
|
|
EFIAPI
|
||
|
|
LimitCpuidMaxvalInitialize (
|
||
|
|
IN UINTN ProcessorNumber,
|
||
|
|
IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
|
||
|
|
IN VOID *ConfigData, OPTIONAL
|
||
|
|
IN BOOLEAN State
|
||
|
|
)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// The scope of LimitCpuidMaxval bit in the MSR_IA32_MISC_ENABLE is core for below
|
||
|
|
// processor type, only program MSR_IA32_MISC_ENABLE for thread 0 in each core.
|
||
|
|
//
|
||
|
|
if (IS_PENTIUM_4_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
|
||
|
|
IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
|
||
|
|
IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
|
||
|
|
IS_CORE_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
|
||
|
|
IS_CORE2_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
|
||
|
|
if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
|
||
|
|
return RETURN_SUCCESS;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
CPU_REGISTER_TABLE_WRITE_FIELD (
|
||
|
|
ProcessorNumber,
|
||
|
|
Msr,
|
||
|
|
MSR_IA32_MISC_ENABLE,
|
||
|
|
MSR_IA32_MISC_ENABLE_REGISTER,
|
||
|
|
Bits.LimitCpuidMaxval,
|
||
|
|
(State) ? 1 : 0
|
||
|
|
);
|
||
|
|
return RETURN_SUCCESS;
|
||
|
|
}
|