1/* $NetBSD: biosmem.S,v 1.5 1997/08/18 22:44:01 hannken 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 36#include <machine/asm.h> 37 38#define data32 .byte 0x66 39 40 .text 41 42/* get mem below 1M, in kByte */ 43 44ENTRY(getbasemem) 45 pushl %ebp 46 movl %esp,%ebp 47 pushl %ebx 48 push %esi 49 push %edi 50 51 call _C_LABEL(prot_to_real) 52 53 int $0x12 54 # zero-extend 16-bit result to 32 bits. 55 data32 56 movl $0, %ebx 57 mov %eax,%ebx # !!! at run time, it is mov %ax,%bx 58 59 data32 60 call _C_LABEL(real_to_prot) 61 62 movl %ebx, %eax 63 64 pop %edi 65 pop %esi 66 popl %ebx 67 popl %ebp 68 ret 69 70/* get mem above 1M, in kByte */ 71 72ENTRY(getextmem1) 73 pushl %ebp 74 movl %esp,%ebp 75 pushl %ebx 76 push %esi 77 push %edi 78 79 call _C_LABEL(prot_to_real) 80 81 movb $0x88,%ah 82 int $0x15 83 84 # zero-extend 16-bit result to 32 bits. 85 data32 86 movl $0, %ebx 87 mov %eax,%ebx # !!! at run time, it is mov %ax,%bx 88 89 data32 90 call _C_LABEL(real_to_prot) 91 92 movl %ebx, %eax 93 94 pop %edi 95 pop %esi 96 popl %ebx 97 popl %ebp 98 ret 99 100