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IOCTL Reference External Interface (Compact 2013)

  • Article

10/16/2014

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.

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

Reference

IOCTL Reference