1/*- 2 * Copyright (c) 1997 Jonathan Lemon 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29/* 30 * Functions for calling x86 BIOS functions from the BSD kernel 31 */ 32 33#include <machine/asmacros.h> 34 35 .text 36 37/* 38 * bios32_apm98(regs, offset, segment) 39 * struct bios_regs *regs; 40 * u_int offset; 41 * u_short segment; 42 */ 43ENTRY(bios32_apm98) 44 pushl %ebp 45 movl 16(%esp),%ebp 46 mov %bp,bioscall_vector+4 47 movl 12(%esp),%ebp 48 movl %ebp,bioscall_vector 49 movl 8(%esp),%ebp 50 pushl %ebx 51 pushl %esi 52 pushl %edi 53 movl 0(%ebp),%eax 54 movl 4(%ebp),%ebx 55 movl 8(%ebp),%ecx 56 movl 12(%ebp),%edx 57 movl 16(%ebp),%esi 58 movl 20(%ebp),%edi 59 pushl %ebp 60 pushfl 61 cli 62 lcall *bioscall_vector 63 movl %eax,%edi 64 movl %edx,%esi 65 lahf 66 movl apm_necsmm_addr,%edx 67 andl %edx,%edx 68 jz 9f 69 inb %dx,%al 70 andl apm_necsmm_mask,%eax 71 outb %al,%dx 729: 73 sti 74 popl %ebp 75 movl %edi,0(%ebp) 76 movl %ebx,4(%ebp) 77 movl %ecx,8(%ebp) 78 movl %esi,12(%ebp) 79 movl $0,16(%ebp) /* esi is cannot get */ 80 movl $0,20(%ebp) /* edi is cannot get */ 81 movl %edi,%eax 82 andl $0x100,%eax 83 popl %edi 84 popl %esi 85 popl %ebx 86 popl %ebp 87 ret 88