1 /* $NetBSD: message.S,v 1.4 2009/11/19 22:10:03 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by David Laight. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <machine/asm.h> 33 34 .global message, message_1 35 36 #if defined(BOOT_MSG_COM0) && !defined(COM_PORT_VAL) 37 #define COM_PORT_VAL $0x3f8 /* Value for COM1 */ 38 #endif 39 40 /* 41 * message: write the error message in %ds:%esi to the console 42 */ 43 message: 44 /* 45 * BIOS call "INT 10H Function 0Eh" to write character to console 46 * Call with %ah = 0x0e 47 * %al = character 48 * %bh = page 49 * %bl = foreground color 50 */ 51 .code16 52 pusha 53 message_1: /* for dump_eax */ 54 lodsb 55 1: 56 #ifdef COM_PORT_VAL 57 mov COM_PORT_VAL, %dx 58 outb %al, %dx 59 add $5, %dl 60 2: inb %dx 61 test $0x40, %al 62 jz 2b 63 #else 64 movb $0x0e, %ah 65 movw $0x0001, %bx 66 int $0x10 67 #endif 68 lodsb 69 testb %al, %al 70 jnz 1b 71 72 #ifdef MESSAGE_PAUSE 73 /* Delay for about 1 second to allow message to be read */ 74 movb $0x86, %ah 75 mov $16, %cx /* about a second */ 76 int $0x15 /* delay cx:dx usecs */ 77 #endif 78 popa 79 ret 80
Indexes created Sat Sep 20 22:09:52 GMT 2025