AcpiHwRegisterRead
Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
Status |= AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
Status = AcpiHwRegisterRead (BitRegInfo->ParentRegister,
AcpiHwRegisterRead (