1*58a2b000SEvgeniy Ivanov/* $NetBSD: biosmem.S,v 1.9 2011/06/16 13:27:59 joerg Exp $ */ 2*58a2b000SEvgeniy Ivanov 3*58a2b000SEvgeniy Ivanov/* 4*58a2b000SEvgeniy Ivanov * Copyright (c) 1996 5*58a2b000SEvgeniy Ivanov * Perry E. Metzger. 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 * 3. All advertising materials mentioning features or use of this software 16*58a2b000SEvgeniy Ivanov * must display the following acknowledgements: 17*58a2b000SEvgeniy Ivanov * This product includes software developed for the NetBSD Project 18*58a2b000SEvgeniy Ivanov * by Perry E. Metzger. 19*58a2b000SEvgeniy Ivanov * 4. The names of the authors may not be used to endorse or promote products 20*58a2b000SEvgeniy Ivanov * derived from this software without specific prior written permission. 21*58a2b000SEvgeniy Ivanov * 22*58a2b000SEvgeniy Ivanov * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23*58a2b000SEvgeniy Ivanov * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24*58a2b000SEvgeniy Ivanov * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25*58a2b000SEvgeniy Ivanov * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26*58a2b000SEvgeniy Ivanov * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27*58a2b000SEvgeniy Ivanov * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28*58a2b000SEvgeniy Ivanov * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29*58a2b000SEvgeniy Ivanov * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30*58a2b000SEvgeniy Ivanov * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31*58a2b000SEvgeniy Ivanov * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32*58a2b000SEvgeniy Ivanov * 33*58a2b000SEvgeniy Ivanov */ 34*58a2b000SEvgeniy Ivanov 35*58a2b000SEvgeniy Ivanov#include <machine/asm.h> 36*58a2b000SEvgeniy Ivanov 37*58a2b000SEvgeniy Ivanov .text 38*58a2b000SEvgeniy Ivanov 39*58a2b000SEvgeniy Ivanov/* get mem below 1M, in kByte */ 40*58a2b000SEvgeniy Ivanov 41*58a2b000SEvgeniy IvanovENTRY(getbasemem) 42*58a2b000SEvgeniy Ivanov pusha 43*58a2b000SEvgeniy Ivanov 44*58a2b000SEvgeniy Ivanov call _C_LABEL(prot_to_real) 45*58a2b000SEvgeniy Ivanov .code16 46*58a2b000SEvgeniy Ivanov 47*58a2b000SEvgeniy Ivanov int $0x12 48*58a2b000SEvgeniy Ivanov # zero-extend 16-bit result to 32 bits. 49*58a2b000SEvgeniy Ivanov movzwl %ax, %eax 50*58a2b000SEvgeniy Ivanov 51*58a2b000SEvgeniy Ivanov calll _C_LABEL(real_to_prot) 52*58a2b000SEvgeniy Ivanov .code32 53*58a2b000SEvgeniy Ivanov 54*58a2b000SEvgeniy Ivanov movl %eax, 28(%esp) 55*58a2b000SEvgeniy Ivanov popa 56*58a2b000SEvgeniy Ivanov ret 57*58a2b000SEvgeniy Ivanov 58*58a2b000SEvgeniy Ivanov/* get mem above 1M, in kByte */ 59*58a2b000SEvgeniy Ivanov 60*58a2b000SEvgeniy IvanovENTRY(getextmem1) 61*58a2b000SEvgeniy Ivanov pusha 62*58a2b000SEvgeniy Ivanov 63*58a2b000SEvgeniy Ivanov call _C_LABEL(prot_to_real) 64*58a2b000SEvgeniy Ivanov .code16 65*58a2b000SEvgeniy Ivanov 66*58a2b000SEvgeniy Ivanov movb $0x88,%ah 67*58a2b000SEvgeniy Ivanov int $0x15 68*58a2b000SEvgeniy Ivanov 69*58a2b000SEvgeniy Ivanov # zero-extend 16-bit result to 32 bits. 70*58a2b000SEvgeniy Ivanov movzwl %ax, %eax 71*58a2b000SEvgeniy Ivanov 72*58a2b000SEvgeniy Ivanov calll _C_LABEL(real_to_prot) 73*58a2b000SEvgeniy Ivanov .code32 74*58a2b000SEvgeniy Ivanov 75*58a2b000SEvgeniy Ivanov movl %eax, 28(%esp) 76*58a2b000SEvgeniy Ivanov popa 77*58a2b000SEvgeniy Ivanov ret 78*58a2b000SEvgeniy Ivanov 79