1/* $NetBSD: bioscall.S,v 1.1 2002/11/22 15:01:16 fvdl Exp $ */ 2 3/*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by John Kohl. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38#include <machine/param.h> 39#include <machine/bioscall.h> 40 41#include <machine/asm.h> 42 43/* LINTSTUB: include <sys/types.h> */ 44/* LINTSTUB: include <machine/bioscall.h> */ 45 46 .globl _C_LABEL(PTDpaddr) /* from locore.s */ 47 48_C_LABEL(biostramp_image): 49 .globl _C_LABEL(biostramp_image) 50 518: 52#include "i386/bioscall/biostramp.inc" 539: 54 55 .globl _C_LABEL(biostramp_image_size) 56_C_LABEL(biostramp_image_size): 57 .long 9b - 8b 58 59/* 60 * void bioscall(int function, struct bioscallregs *regs): 61 * call the BIOS interrupt "function" from real mode with 62 * registers as specified in "regs" 63 * for the flags, though, only these flags are passed to the BIOS-- 64 * the remainder come from the flags register at the time of the call: 65 * (PSL_C|PSL_PF|PSL_AF|PSL_Z|PSL_N|PSL_D|PSL_V) 66 * 67 * Fills in *regs with registers as returned by BIOS. 68 */ 69/* LINTSTUB: Func: void bioscall(int function, struct bioscallregs *regs) */ 70NENTRY(bioscall) 71 pushl %ebp 72 movl %esp,%ebp /* set up frame ptr */ 73 74 movl %cr3,%eax /* save PTDB register */ 75 pushl %eax 76 77 movl _C_LABEL(PTDpaddr),%eax /* install proc0 PTD */ 78 movl %eax,%cr3 79 80 movl $(BIOSTRAMP_BASE),%eax /* address of trampoline area */ 81 pushl 12(%ebp) 82 pushl 8(%ebp) 83 call *%eax /* machdep.c initializes it */ 84 addl $8,%esp /* clear args from stack */ 85 86 popl %eax 87 movl %eax,%cr3 /* restore PTDB register */ 88 89 leave 90 ret 91