1*58a2b000SEvgeniy Ivanov/* $NetBSD: biosgetrtc.S,v 1.7 2011/06/16 13:27:59 joerg Exp $ */ 2*58a2b000SEvgeniy Ivanov 3*58a2b000SEvgeniy Ivanov/* 4*58a2b000SEvgeniy Ivanov * Copyright (c) 1996 5*58a2b000SEvgeniy Ivanov * Matthias Drochner. All rights reserved. 6*58a2b000SEvgeniy Ivanov * 7*58a2b000SEvgeniy Ivanov * Redistribution and use in source and binary forms, with or without 8*58a2b000SEvgeniy Ivanov * modification, are permitted provided that the following conditions 9*58a2b000SEvgeniy Ivanov * are met: 10*58a2b000SEvgeniy Ivanov * 1. Redistributions of source code must retain the above copyright 11*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer. 12*58a2b000SEvgeniy Ivanov * 2. Redistributions in binary form must reproduce the above copyright 13*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer in the 14*58a2b000SEvgeniy Ivanov * documentation and/or other materials provided with the distribution. 15*58a2b000SEvgeniy Ivanov * 16*58a2b000SEvgeniy Ivanov * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17*58a2b000SEvgeniy Ivanov * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18*58a2b000SEvgeniy Ivanov * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19*58a2b000SEvgeniy Ivanov * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20*58a2b000SEvgeniy Ivanov * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21*58a2b000SEvgeniy Ivanov * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22*58a2b000SEvgeniy Ivanov * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23*58a2b000SEvgeniy Ivanov * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24*58a2b000SEvgeniy Ivanov * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25*58a2b000SEvgeniy Ivanov * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26*58a2b000SEvgeniy Ivanov * 27*58a2b000SEvgeniy Ivanov */ 28*58a2b000SEvgeniy Ivanov 29*58a2b000SEvgeniy Ivanov#include <machine/asm.h> 30*58a2b000SEvgeniy Ivanov 31*58a2b000SEvgeniy IvanovENTRY(biosgetrtc) 32*58a2b000SEvgeniy Ivanov pusha 33*58a2b000SEvgeniy Ivanov pushl %eax 34*58a2b000SEvgeniy Ivanov 35*58a2b000SEvgeniy Ivanov xorl %ebx, %ebx 36*58a2b000SEvgeniy Ivanov 37*58a2b000SEvgeniy Ivanov call _C_LABEL(prot_to_real) # enter real mode 38*58a2b000SEvgeniy Ivanov .code16 39*58a2b000SEvgeniy Ivanov 40*58a2b000SEvgeniy Ivanov movb $2, %ah 41*58a2b000SEvgeniy Ivanov int $0x1a 42*58a2b000SEvgeniy Ivanov jnc ok 43*58a2b000SEvgeniy Ivanov movl $-1, %ebx 44*58a2b000SEvgeniy Ivanov 45*58a2b000SEvgeniy Ivanovok: 46*58a2b000SEvgeniy Ivanov calll _C_LABEL(real_to_prot) # back to protected mode 47*58a2b000SEvgeniy Ivanov .code32 48*58a2b000SEvgeniy Ivanov 49*58a2b000SEvgeniy Ivanov popl %eax 50*58a2b000SEvgeniy Ivanov movb %ch, (%eax) 51*58a2b000SEvgeniy Ivanov movb %cl, 1(%eax) 52*58a2b000SEvgeniy Ivanov movb %dh, 2(%eax) 53*58a2b000SEvgeniy Ivanov movb $0, 3(%eax) 54*58a2b000SEvgeniy Ivanov 55*58a2b000SEvgeniy Ivanov movl %ebx, 28(%esp) 56*58a2b000SEvgeniy Ivanov 57*58a2b000SEvgeniy Ivanov popa 58*58a2b000SEvgeniy Ivanov ret 59