VDHPortIO

Perform IO to a specified port.

This function is used to perform input/output operations to a specified local port.

Parameters

Pointer to a PORT_IO structure.

Exit

Return code.

Structures

 typedef struct port_io_s
 {
    ulong_t port;   (Input)
    ulong_t data;   (Input/Output)
    ulong_t flags;  (Input)
 } PORT_IO;

port - indicates which port to read to, or write from.

data - contains the data read from a read request, or the data to write if a write request.

flags - indicate what operation to perform.

• IO_READ_BYTE Read a byte from the port
• IO_READ_WORD Read a word from the port
• IO_READ_DWORD Read a dword from the port
• IO_WRITE_BYTE Write a byte to the port
• IO_WRITE_WORD Write a word to the port
• IO_WRITE_DWORD Write a dword to the port