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Manual page for inb(9F)

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);

AVAILABILITY

x86

INTERFACE LEVEL

Solaris x86 DDI specific (Solaris x86 DDI).

ARGUMENTS

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 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.