NAME

outb, outw, outl - write to an I/O port

SYNOPSIS

#include <sys/ddi.h>
#include <sys/sunddi.h>
void outb(int port, unsigned char value);

void outw(int port, unsigned short value);

void outl(int port, unsigned long value);

INTERFACE LEVEL

The functions described here are obsolete. For the outb(), outw(), and outl() functions use, respectively, ddi_put8(9F), ddi_put16(9F), and ddi_put32(9F) instead.

PARAMETERS

port

A valid I/O port address.

value

The data to be written to the I/O port.

addr

The address of a buffer from which the values will be fetched.

count

The number of values to be written to the I/O port.

DESCRIPTION

These routines write data of various sizes to the I/O port with the address specified by port.

The outb(), outw(), and outl() functions write 8 bits, 16 bits, and 32 bits of data respectively, writing the data specified by value.

CONTEXT

These functions may be called from user, interrupt, or kernel context.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Architecture	x86
Interface Stability	Obsolete