message.S revision 1.4
1 1.4 dsl /* $NetBSD: message.S,v 1.4 2009/11/19 22:10:03 dsl Exp $ */ 2 1.1 dsl 3 1.1 dsl /*- 4 1.1 dsl * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 1.1 dsl * All rights reserved. 6 1.1 dsl * 7 1.1 dsl * This code is derived from software contributed to The NetBSD Foundation 8 1.1 dsl * by David Laight. 9 1.1 dsl * 10 1.1 dsl * Redistribution and use in source and binary forms, with or without 11 1.1 dsl * modification, are permitted provided that the following conditions 12 1.1 dsl * are met: 13 1.1 dsl * 1. Redistributions of source code must retain the above copyright 14 1.1 dsl * notice, this list of conditions and the following disclaimer. 15 1.1 dsl * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 dsl * notice, this list of conditions and the following disclaimer in the 17 1.1 dsl * documentation and/or other materials provided with the distribution. 18 1.1 dsl * 19 1.1 dsl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1 dsl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1 dsl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1 dsl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1 dsl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1 dsl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1 dsl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1 dsl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1 dsl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1 dsl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1 dsl * POSSIBILITY OF SUCH DAMAGE. 30 1.1 dsl */ 31 1.1 dsl 32 1.1 dsl #include <machine/asm.h> 33 1.1 dsl 34 1.2 dsl .global message, message_1 35 1.2 dsl 36 1.4 dsl #if defined(BOOT_MSG_COM0) && !defined(COM_PORT_VAL) 37 1.4 dsl #define COM_PORT_VAL $0x3f8 /* Value for COM1 */ 38 1.4 dsl #endif 39 1.4 dsl 40 1.1 dsl /* 41 1.1 dsl * message: write the error message in %ds:%esi to the console 42 1.1 dsl */ 43 1.2 dsl message: 44 1.1 dsl /* 45 1.1 dsl * BIOS call "INT 10H Function 0Eh" to write character to console 46 1.1 dsl * Call with %ah = 0x0e 47 1.1 dsl * %al = character 48 1.1 dsl * %bh = page 49 1.1 dsl * %bl = foreground color 50 1.1 dsl */ 51 1.1 dsl .code16 52 1.1 dsl pusha 53 1.2 dsl message_1: /* for dump_eax */ 54 1.2 dsl lodsb 55 1.1 dsl 1: 56 1.4 dsl #ifdef COM_PORT_VAL 57 1.4 dsl mov COM_PORT_VAL, %dx 58 1.4 dsl outb %al, %dx 59 1.4 dsl add $5, %dl 60 1.4 dsl 2: inb %dx 61 1.4 dsl test $0x40, %al 62 1.4 dsl jz 2b 63 1.4 dsl #else 64 1.1 dsl movb $0x0e, %ah 65 1.1 dsl movw $0x0001, %bx 66 1.1 dsl int $0x10 67 1.4 dsl #endif 68 1.2 dsl lodsb 69 1.2 dsl testb %al, %al 70 1.2 dsl jnz 1b 71 1.1 dsl 72 1.1 dsl #ifdef MESSAGE_PAUSE 73 1.1 dsl /* Delay for about 1 second to allow message to be read */ 74 1.1 dsl movb $0x86, %ah 75 1.1 dsl mov $16, %cx /* about a second */ 76 1.1 dsl int $0x15 /* delay cx:dx usecs */ 77 1.1 dsl #endif 78 1.1 dsl popa 79 1.1 dsl ret 80
Indexes created Thu Sep 25 16:09:42 GMT 2025