Assigns the PsReadMmioPhysical Pulse API function to the request.
Please refer to the PsReadMmioPhysical Pulse API function for details.
If the function succeeds, the return value is PULSE_STATUS_SUCCESS.
If it fails, it returns one of the PULSE_STATUS values. Possible return codes include, but are not limited to, the following:
| PULSE_STATUS_INVALID_PARAMETER0xC0000010 | The pRequest parameter is NULL. |
Cancels any pending Pulse API call assigned to this request.