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The following table shows the IOCTL functions.
| Programming Element | Description |
|---|---|
| OALIoCtlHalDDI | This function retrieves information and sends commands to the Ddi_hflat display driver. |
| OALIoCtlHalGetDeviceId | This function fills in a DEVICE_ID structure. |
| OALIoCtlHalGetDeviceInfo | This function provides information about the system parameters information (SPI) codes supported by the SystemParametersInfo function. |
| OALIoCtlHalGetHWEntropy | This function creates a 64-bit value that is unique to the hardware and does not change. |
| OALIoCtlHalGetRandomSeed | This function creates a 64-bit random number and stores it in the output buffer. |
| OALIoCtlHalGetRegSecureKeys | This function enables the OEM to extend the list of registry paths that should be protected from nontrusted applications. |
| OALIoCtlHalGetUUID | This function returns the universally unique identifier (UUID). |
| OALIoCtlHalInitRegistry | This function signals that the registry is active and that data from the OAL can now be propagated to the registry. |
| OALIoCtlHalReboot | This function supports a warm boot of the target device. |
| OALIoCtlHalUpdateMode | This function gets and sets the RAM-based update mode flag. |
| OALIoCtlProcessorInfo | This function handles a request by an application to retrieve microprocessor information from the OAL and store it in the PROCESSOR_INFO structure. |
See Also
IOCTL Reference | Production-Quality OAL Components
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