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UefiCpuPkg/CpuDxe: implement Mp Protocol:GetNumberOfProcessors() 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16355 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Chen Fan 2014-11-13 18:26:42 +00:00 committed by jljusten
parent cfa2fac1f6
commit d894d8b704
2 changed files with 125 additions and 1 deletions
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82
UefiCpuPkg/CpuDxe/CpuMp.c
View File

@ -25,7 +25,7 @@ VOID *mTopOfApCommonStack = 0;
VOID *mApStackStart = 0;
EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
NULL, // GetNumberOfProcessors,
GetNumberOfProcessors,
NULL, // GetProcessorInfo,
NULL, // StartupAllAPs,
NULL, // StartupThisAP,
@ -34,6 +34,86 @@ EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
WhoAmI
};
/**
Check whether caller processor is BSP.
@retval TRUE the caller is BSP
@retval FALSE the caller is AP
**/
BOOLEAN
IsBSP (
VOID
)
{
UINTN CpuIndex;
CPU_DATA_BLOCK *CpuData;
CpuData = NULL;
WhoAmI (&mMpServicesTemplate, &CpuIndex);
CpuData = &mMpSystemData.CpuDatas[CpuIndex];
return CpuData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT ? TRUE : FALSE;
}
/**
This service retrieves the number of logical processor in the platform
and the number of those logical processors that are enabled on this boot.
This service may only be called from the BSP.
This function is used to retrieve the following information:
- The number of logical processors that are present in the system.
- The number of enabled logical processors in the system at the instant
this call is made.
Because MP Service Protocol provides services to enable and disable processors
dynamically, the number of enabled logical processors may vary during the
course of a boot session.
If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
is returned in NumberOfProcessors, the number of currently enabled processor
is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
instance.
@param[out] NumberOfProcessors Pointer to the total number of logical
processors in the system, including the BSP
and disabled APs.
@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
processors that exist in system, including
the BSP.
@retval EFI_SUCCESS The number of logical processors and enabled
logical processors was retrieved.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
@retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
**/
EFI_STATUS
EFIAPI
GetNumberOfProcessors (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *NumberOfProcessors,
OUT UINTN *NumberOfEnabledProcessors
)
{
if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (!IsBSP ()) {
return EFI_DEVICE_ERROR;
}
*NumberOfProcessors = mMpSystemData.NumberOfProcessors;
*NumberOfEnabledProcessors = mMpSystemData.NumberOfEnabledProcessors;
return EFI_SUCCESS;
}
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.

44
UefiCpuPkg/CpuDxe/CpuMp.h
View File

@ -124,6 +124,50 @@ FillInProcessorInformation (
IN UINTN ProcessorNumber
);
/**
This service retrieves the number of logical processor in the platform
and the number of those logical processors that are enabled on this boot.
This service may only be called from the BSP.
This function is used to retrieve the following information:
- The number of logical processors that are present in the system.
- The number of enabled logical processors in the system at the instant
this call is made.
Because MP Service Protocol provides services to enable and disable processors
dynamically, the number of enabled logical processors may vary during the
course of a boot session.
If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
is returned in NumberOfProcessors, the number of currently enabled processor
is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
instance.
@param[out] NumberOfProcessors Pointer to the total number of logical
processors in the system, including the BSP
and disabled APs.
@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
processors that exist in system, including
the BSP.
@retval EFI_SUCCESS The number of logical processors and enabled
logical processors was retrieved.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
@retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
**/
EFI_STATUS
EFIAPI
GetNumberOfProcessors (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *NumberOfProcessors,
OUT UINTN *NumberOfEnabledProcessors
);
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.