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head/stand/i386/kgzldr/sio.S
| Property | Old Value | New Value |
|---|---|---|
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| # | |||||
| # 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 | |||||