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