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UefiCpuPkg/CpuDxe: implement Mp Protocol: WhoAmI() 

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@16354 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Chen Fan 2014-11-13 18:26:32 +00:00 committed by jljusten
parent 03673ae11e
commit cfa2fac1f6
2 changed files with 81 additions and 1 deletions
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51
UefiCpuPkg/CpuDxe/CpuMp.c
View File

@ -31,9 +31,58 @@ EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
NULL, // StartupThisAP,
NULL, // SwitchBSP,
NULL, // EnableDisableAP,
NULL // WhoAmI
WhoAmI
};
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.
This service returns the processor handle number for the calling processor.
The returned value is in the range from 0 to the total number of logical
processors minus 1. The total number of logical processors can be retrieved
with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
is returned. Otherwise, the current processors handle number is returned in
ProcessorNumber, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[out] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
**/
EFI_STATUS
EFIAPI
WhoAmI (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *ProcessorNumber
)
{
UINTN Index;
UINT32 ProcessorId;
if (ProcessorNumber == NULL) {
return EFI_INVALID_PARAMETER;
}
ProcessorId = GetApicId ();
for (Index = 0; Index < mMpSystemData.NumberOfProcessors; Index++) {
if (mMpSystemData.CpuDatas[Index].Info.ProcessorId == ProcessorId) {
break;
}
}
*ProcessorNumber = Index;
return EFI_SUCCESS;
}
/**
Application Processors do loop routine
after switch to its own stack.

31
UefiCpuPkg/CpuDxe/CpuMp.h
View File

@ -124,5 +124,36 @@ FillInProcessorInformation (
IN UINTN ProcessorNumber
);
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.
This service returns the processor handle number for the calling processor.
The returned value is in the range from 0 to the total number of logical
processors minus 1. The total number of logical processors can be retrieved
with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
is returned. Otherwise, the current processors handle number is returned in
ProcessorNumber, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[out] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
**/
EFI_STATUS
EFIAPI
WhoAmI (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *ProcessorNumber
);
#endif // _CPU_MP_H_