| | 1 | # |
| | 2 | # Copyright (c) 1999 Global Technology Associates, Inc. |
| | 3 | # All rights reserved. |
| | 4 | # |
| | 5 | # Redistribution and use in source and binary forms, with or without |
| | 6 | # modification, are permitted provided that the following conditions |
| | 7 | # are met: |
| | 8 | # 1. Redistributions of source code must retain the above copyright |
| | 9 | # notice, this list of conditions and the following disclaimer. |
| | 10 | # 2. Redistributions in binary form must reproduce the above copyright |
| | 11 | # notice, this list of conditions and the following disclaimer in the |
| | 12 | # documentation and/or other materials provided with the distribution. |
| | 13 | # |
| | 14 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND |
| | 15 | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 16 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| | 17 | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS |
| | 18 | # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| | 19 | # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| | 20 | # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| | 21 | # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| | 22 | # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| | 23 | # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| | 24 | # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| | 25 | # |
| | 26 | # From: sio.s 1.3 1999/01/10 14:48:03 rnordier |
| | 27 | # $FreeBSD: src/sys/boot/i386/kgzldr/sio.s,v 1.5 2002/09/30 20:37:57 peter Exp $ |
| | 28 | # $DragonFly: src/sys/boot/i386/kgzldr/Attic/sio.s,v 1.3 2003/11/10 06:08:35 dillon Exp $ |
| | 29 | # |
| | 30 | |
| | 31 | .globl sio_putchr |
| | 32 | |
| | 33 | # void sio_putchr(int c) |
| | 34 | |
| | 35 | sio_putchr: movw $SIO_PRT+0x5,%dx # Line status reg |
| | 36 | xor %ecx,%ecx # Timeout |
| | 37 | movb $0x40,%ch # counter |
| | 38 | sio_putchr.1: inb %dx,%al # Transmitter |
| | 39 | testb $0x20,%al # buffer empty? |
| | 40 | loopz sio_putchr.1 # No |
| | 41 | jz sio_putchr.2 # If timeout |
| | 42 | movb 0x4(%esp,1),%al # Get character |
| | 43 | subb $0x5,%dl # Transmitter hold reg |
| | 44 | outb %al,%dx # Write character |
| | 45 | sio_putchr.2: ret # To caller |
projects / dragonfly.git / blame_incremental