Content-type: text/html Man page of inb

inb

Section: Kernel Functions for Drivers (9F)
Updated: 16 Jan 2006
Index Return to Main Contents
 

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 TYPEATTRIBUTE VALUE
Architecturex86
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


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
ATTRIBUTES
SEE ALSO

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Time: 02:39:37 GMT, October 02, 2010