1/* $NetBSD: biosmem.S,v 1.9 2011/06/16 13:27:59 joerg Exp $ */ 2 3/* 4 * Copyright (c) 1996 5 * Perry E. Metzger. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgements: 17 * This product includes software developed for the NetBSD Project 18 * by Perry E. Metzger. 19 * 4. The names of the authors may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35#include <machine/asm.h> 36 37 .text 38 39/* get mem below 1M, in kByte */ 40 41ENTRY(getbasemem) 42 pusha 43 44 call _C_LABEL(prot_to_real) 45 .code16 46 47 int $0x12 48 # zero-extend 16-bit result to 32 bits. 49 movzwl %ax, %eax 50 51 calll _C_LABEL(real_to_prot) 52 .code32 53 54 movl %eax, 28(%esp) 55 popa 56 ret 57 58/* get mem above 1M, in kByte */ 59 60ENTRY(getextmem1) 61 pusha 62 63 call _C_LABEL(prot_to_real) 64 .code16 65 66 movb $0x88,%ah 67 int $0x15 68 69 # zero-extend 16-bit result to 32 bits. 70 movzwl %ax, %eax 71 72 calll _C_LABEL(real_to_prot) 73 .code32 74 75 movl %eax, 28(%esp) 76 popa 77 ret 78 79