xref: /titanic_52/usr/src/man/man9f/inb.9f (revision 49d3bc91e27cd871b950d56c01398fa2f2e12ab4) 
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 inb 9F "16 Jan 2006" "SunOS 5.11" "Kernel Functions for Drivers"
 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_get8(9F), and ddi_get8(9F) instead. For repinsb(),
repinsw(), andrepinsl(), use, respectively, ddi_rep_get8(9F),
ddi_rep_get8(9F), and ddi_rep_get8(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_get8(9F),
ddi_get8(9F), ddi_rep_get8(9F), ddi_rep_get8(9F),
ddi_rep_get8(9F), outb(9F)


Writing Device Drivers