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
Solaris IA DDI specific (Solaris IA DDI).
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:
SEE ALSO
eisa(4), isa(4), attributes(5), outb(9F)
Writing Device Drivers