A.2.3.5 Memory and I/O Functions

The NDIS interface library provides a set of memory functions that translate general operating system requests into OS-specific calls. This allows a standard portable interface that supports the various operating environments for NDIS 3.0 drivers. Memory functions of the NDIS interface library are defined in Table A.2.8.

Table A.2.8 Memory and I/O Functions

Function	Definition
NdisAllocateMemory	Allocates memory for use by a driver.
NdisAllocateSharedMemory	Allocates memory the NIC driver shares with its network interface card.
NdisFlushBuffer	Flushes a buffer allocated as shared memory.
NdisFreeMemory	Frees memory that NdisAllocateMemory allocates.
NdisFreeSharedMemory	Frees memory that NdisAllocateSharedMemory allocates.
NdisGetCacheFillSize	Retrieves the host cache fill size.
NdisMapIoSpace	Maps a physical I/O address into a virtual address for a network card that has memory with a physical address in the host I/O space.
NdisMoveFromMappedMemory	Copies to host memory from memory mapped using NdisMapIoSpace.
NdisMoveMappedMemory	Copies memory data to/from a network card physical I/O address that NdisMapIoSpace has mapped to a virtual address.
NdisMoveMemory	Copies memory data from one location to another.
Ndis MoveToMappedMemory	Copies data from host memory to memory mapped using NdisMapIoSpace.
NdisRawReadPort Functions	Read a single piece of data from an I/O port. Specific functions include:   NdisRawReadPortUchar    NdisRawReadPortUlong    NdisRawReadPortUshort
NdisRawReadPortBuffer Functions	Read a buffer of data from an I/O port. Specific functions include:   NdisRawReadPortBufferUchar    NdisRawReadPortBufferUlong    NdisRawReadPortBufferUshort
NdisRawWritePort Functions	Writes a single piece of data to an I/O port. Specific functions include:   NdisRawWritePortUchar    NdisRawWritePortUlong    NdisRawWritePortUshort
NdisRawWritePortBuffer Functions	Writes a buffer of data to I/O port. Specific functions include:   NdisRawWritePortBufferUchar    NdisRawWritePortBufferUlong    NdisRawWritePortBufferUshort
NdisReadPort Functions	Read a single piece of data from an I/O port. Specific functions include:   NdisReadPortUchar    NdisReadPortUlong    NdisReadPortUshort
NdisReadPortBuffer Functions	Read a buffer of data from an I/O port. Specific functions include:   NdisReadPortBufferUchar    NdisReadPortBufferUlong    NdisReadPortBufferUshort
NdisReadRegister Functions	Read data from non-cached memory. Specific functions are:   NdisReadRegisterUchar   NdisReadRegisterUlong   NdisReadRegisterUshort
NdisUnmapIoSpace	Disassociates a physical I/O address from a virtual address that NdisMapIoSpace has mapped to it.
NdisUpdateSharedMemory	Ensures that data that the NIC driver reads from a shared memory region is fully up to date.
NdisWritePort Functions	Write a single piece of data to an I/O port. Specific functions include:   NdisWritePortUchar    NdisWritePortUlong    NdisWritePortUshort
NdisWritePortBuffer Functions	Write a buffer of data to an I/O port. Specific functions include:   NdisWritePortBufferUchar   NdisWritePortBufferUlong   NdisWritePortBufferUshort
NdisWriteRegister Functions	Write a single piece of data to non-cached memory. Specific functions are:   NdisWriteRegisterUchar   NdisWriteRegisterUlong   NdisWriteRegisterUshort.
NdisZeroMappedMemory	Zeroes out memory that NdisMapIoSpace maps.
NdisZeroMemory	Zeroes out a block of memory.