VDHPortIO: Difference between revisions
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This function is used to perform input/output operations to a specified local 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== | |||
<pre> | |||
typedef struct port_io_s | typedef struct port_io_s | ||
{ | { | ||
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ulong_t flags; (Input) | ulong_t flags; (Input) | ||
} PORT_IO; | } PORT_IO; | ||
</ | </pre> | ||
:port - indicates which port to read to, or write from. | :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. | :data - contains the data read from a read request, or the data to write if a write request. | ||
Latest revision as of 05:45, 18 May 2025
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