/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by David Laight.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <machine/asm.h>
.global message, message_1
#if defined(BOOT_MSG_COM0) && !defined(COM_PORT_VAL)
#define COM_PORT_VAL $0x3f8 /* Value for COM1 */
#endif
/*
* message: write the error message in %ds:%esi to the console
*/
message:
/*
* BIOS call "INT 10H Function 0Eh" to write character to console
* Call with %ah = 0x0e
* %al = character
* %bh = page
* %bl = foreground color
*/
.code16
pusha
message_1: /* for dump_eax */
lodsb
1:
#ifdef COM_PORT_VAL
mov COM_PORT_VAL, %dx
outb %al, %dx
add $5, %dl
2: inb %dx
test $0x40, %al
jz 2b
#else
movb $0x0e, %ah
movw $0x0001, %bx
int $0x10
#endif
lodsb
testb %al, %al
jnz 1b
#ifdef MESSAGE_PAUSE
/* Delay for about 1 second to allow message to be read */
movb $0x86, %ah
mov $16, %cx /* about a second */
int $0x15 /* delay cx:dx usecs */
#endif
popa
ret
