INB(9F)INB(9F)NAME
inb, inw, inl, repinsb, repinsw, repinsd - read from an I/O port
SYNOPSIS
#include <sys/ddi.h>
#include <sys/sunddi.h>
unsigned char inb(int port);
unsigned short inw(int
port);
unsigned long inl(int port);
void repinsb(int port, unsigned char *addr, int
count);
void repinsw(int port, unsigned short *addr, int
count);
void repinsd(int port, unsigned long *addr, int
count);
INTERFACE LEVEL
The functions described here are obsolete. For the inb(), inw(), and
inl() functions, use, respectively, ddi_get8(9F), ddi_get16(9F), and
ddi_get32(9F) instead. For repinsb(), repinsw(), andrepinsl(), use,
respectively, ddi_rep_get8(9F), ddi_rep_get16(9F), and
ddi_rep_get32(9F) instead.
PARAMETERS
port
A valid I/O port address.
addr
The address of a buffer where the values will be stored.
count
The number of values to be read from the I/O port.
DESCRIPTION
These routines read data of various sizes from the I/O port with the
address specified by port.
The inb(), inw(), and inl() functions read 8 bits, 16 bits, and 32 bits
of data respectively, returning the resulting values.
The repinsb(), repinsw(), and repinsd() functions read multiple 8-bit,
16-bit, and 32-bit values, respectively. count specifies the number of
values to be read. A pointer to a buffer will receive the input data;
the buffer must be long enough to hold count values of the requested
size.
RETURN VALUES
The inb(), inw(), and inl() functions return the value that was read
from the I/O port.
CONTEXT
These functions may be called from user, interrupt, or kernel context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────┼─────────────────┤
│Architecture │ x86 │
├────────────────┼─────────────────┤
│Stability Level │ Obsolete │
└────────────────┴─────────────────┘
SEE ALSOisa(4), attributes(5), ddi_get8(9F), ddi_get16(9F), ddi_get32(9F),
ddi_rep_get8(9F), ddi_rep_get16(9F), ddi_rep_get32(9F), outb(9F)
Writing Device Drivers
Oct 24, 2012 INB(9F)