inb(9F) Kernel Functions for Drivers 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
inb(), inw(), and inl() return the value that was read from the I/O port.
CONTEXT
These functions may be called from user or interrupt context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Architecture |x86 |
+-----------------------------+-----------------------------+
|Stability Level | Obsolete |
+-----------------------------+-----------------------------+
SEE ALSO
isa(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
SunOS 5.10 18 Nov 2004 inb(9F)
