repoutsb(D3) repoutsb(D3)
NAME
repoutsb - write bytes from buffer to an I/O port
SYNOPSIS
#include <sys/types.h>
#include <sys/ddi.h>
void repoutsb(int port, uchar_t *addr, int cnt);
Arguments
port A valid 8 bit I/O port.
addr The address of the buffer from which cnt bytes are
written to the I/O port.
cnt The number of bytes to be written to the I/O port.
DESCRIPTION
The repoutsb function provides a C language interface to the
machine instructions that write a string of bytes to an 8 bit
I/O port using the I/O address space, instead of the memory
address space. cnt bytes starting at the address pointed to
by addr are written to the I/O port in cnt write operations.
Return Values
None
USAGE
The buffer should be at least cnt bytes in length.
This function may not be meaningful on all implementations
because some implementations may not support I/O-mapped I/O
(direct I/O instructions). On Intel860 systems, I/O is mapped
to memory (memory-mapped I/O). Therefore, on Intel860
systems, a port is not really an I/O port, but rather a memory
pointer that points to the memory-mapped I/O location. The
port argument is similar to a token that can represent a 16-
bit address for the I/O port for Intel386 systems or a 32-bit
memory address for Intel860 systems.
Level
Initialization, Base or Interrupt.
Synchronization Constraints
Does not sleep.
Copyright 1994 Novell, Inc. Page 1
repoutsb(D3) repoutsb(D3)
Driver-defined basic locks, read/write locks, and sleep locks
may be held across calls to this function.
REFERENCES
inb(D3), inl(D3), inw(D3), outb(D3), outl(D3), outw(D3),
repinsb(D3), repinsd(D3), repinsw(D3), repoutsd(D3),
repoutsw(D3)
NOTICES
Portability
AT-compatible architectures
Applicability
ddi: 1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp
Copyright 1994 Novell, Inc. Page 2