Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.
NdisImmediateReadSharedMemory reads a specified number of bytes from shared device RAM.
VOID NdisImmediateReadSharedMemory( _In_ NDIS_HANDLE WrapperConfigurationContext, _In_ ULONG SharedMemoryAddress, _Inout_ PUCHAR Buffer, _In_ ULONG Length );
Specifies the handle passed to MiniportInitialize.
Specifies the bus-relative base address of the shared device memory range.
Buffer [in, out]
Pointer to a caller-allocated buffer in which this function returns the data read from the device memory range starting at SharedMemoryAddress.
Specifies the size in bytes of the buffer at Buffer and, therefore, how many bytes of data to return.
NdisImmediateReadSharedMemory determines how the host accesses shared device memory, maps the bus-relative base address, and then copies Length bytes of data from the device memory area into the given buffer.
A miniport driver can call NdisImmediateReadSharedMemory during initialization to read data from a range of device memory when that driver has not yet called NdisMMapIoSpace to obtain mapped virtual addresses for the bus-relative device memory range. After its call to NdisMMapIoSpace, the driver uses the returned mapped virtual addresses in PIO operations.
Miniports should not call NdisImmediateReadSharedMemory in a Plug and Play environment.
Not supported for NDIS 6.0 drivers in Windows Vista. Supported for NDIS 5.1 drivers in Windows Vista and Windows XP. Windows XP supports this function for legacy drivers. However, the Windows XP DDK will not build an NDIS driver that calls this function. Drivers should call NdisMMapIoSpaceand then NdisMoveFromMappedMemoryinstead.
|Ndis.h (include Ndis.h)|