NAME
outb, outw, outl, repoutsb, repoutsw, repoutsd − 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);
void repoutsb(int port, unsigned char *addr, int count);
void repoutsw(int port, unsigned short *addr, int count);
void repoutsd(int port, unsigned long *addr, int count);
INTERFACE LEVEL
Solaris IA DDI specific (Solaris IA DDI).
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.
The repoutsb(), repoutsw(), and repoutsd() functions write multiple 8-bit, 16-bit, and 32-bit values, respectively. count specifies the number of values to be written. addr is a pointer to a buffer from which the output values are fetched.
CONTEXT
These functions may be called from user or interrupt context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
SEE ALSO
eisa(4), isa(4), attributes(5), inb(9F)
Writing Device Drivers