IOCTL Reference External Interface (Windows CE 5.0)
The IOCTL library provides an external interface made up of functions and global variables that communicate between the other modular libraries and the OAL and the kernel. The following table shows the programming elements in the external interface.
| Programming Element | Description |
|---|---|
| g_oalIoCtlClockSpeed | This global variable contains information about the processor clock speed. |
| g_oalIoCtlInstructionSet | This global variable contains the processor instruction set identifier. |
| g_oalIoCtlPlatformOEM | This global variable contains information about the hardware platform OEM. |
| g_oalIoCtlPlatformType | This global variable contains information about the hardware platform type. |
| g_oalIoCtlProcessorCore | This global variable contains information about the processor core. |
| g_oalIoCtlProcessorName | This global variable contains information about the processor name. |
| g_oalIoCtlProcessorVendor | This global variable contains information about the processor vendor. |
| g_oalIoCtlTable | This global variable references the global IOCTL table defined in the hardware platform code. |
| OAL_IOCTL_HANDLER | This structure is a global IOCTL table that defines the procedure to be called for an IOCTL code. |
| 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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