VideoPortZeroMemory

VOID VideoPortZeroMemory(

PVOID Destination,

ULONG Length

);

VideoPortZeroMemory fills a block of system memory with zeros.

Parameters

Destination: Specifies the starting address of the block of memory. This value must be in a mapped logical range returned by VideoPortGetDeviceBase.
Length: Specifies the size, in bytes, of the block.

Comments

Miniports’ DriverEntry functions commonly call VideoPortZeroMemory to initialize the VIDEO_HW_INITIALIZATION_DATA structure with zeros.

The given Destination must be in a mapped logical range returned by VideoPortGetDeviceBase and/or a system-space RAM address, such as an address on the stack. Use VideoPortZeroDeviceMemory to fill any device-memory block, such as a frame buffer, with zeros.

A miniport’s HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortZeroMemory.