mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
45 lines
1.8 KiB
ArmAsm
45 lines
1.8 KiB
ArmAsm
#
|
|
# Copyright (c) 1999 Global Technology Associates, Inc.
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
|
|
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
|
|
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
|
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
#
|
|
# From: sio.s 1.3 1999/01/10 14:48:03 rnordier
|
|
# $FreeBSD$
|
|
#
|
|
|
|
.globl sio_putchr
|
|
|
|
# void sio_putchr(int c)
|
|
|
|
sio_putchr: movw $SIO_PRT+0x5,%dx # Line status reg
|
|
xor %ecx,%ecx # Timeout
|
|
movb $0x40,%ch # counter
|
|
sio_putchr.1: inb %dx,%al # Transmitter
|
|
testb $0x20,%al # buffer empty?
|
|
loopz sio_putchr.1 # No
|
|
jz sio_putchr.2 # If timeout
|
|
movb 0x4(%esp,1),%al # Get character
|
|
subb $0x5,%dl # Transmitter hold reg
|
|
outb %al,%dx # Write character
|
|
sio_putchr.2: ret # To caller
|