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/* $OpenBSD: apm_init.S,v 1.4 1997/07/30 19:40:53 flipk Exp $ */
/*
* Copyright (c) 1997 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Michael Shalayeff.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* LP (Laptop Package)
*
* Copyright (C) 1994 by HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
*
* This software may be used, modified, copied, and distributed, in
* both source and binary form provided that the above copyright and
* these terms are retained. Under no circumstances is the author
* responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with its
* use.
*
* Sep., 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
* Oct., 1994 NetBSD port (1.0 BETA 10/2) by ukai
*/
/*
* If you want to know the specification of APM BIOS, see the following
* documentations,
*
* [1] Intel Corporation and Microsoft Corporation, "Advanced Power
* Management, The Next Generation, Version 1.0", Feb.,1992.
*
* [2] Intel Corporation and Microsoft Corporation, "Advanced Power
* Management (APM) BIOS Interface Specification Revision 1.1",
* Sep.,1993, Intel Order Number: 241704-001, Microsoft Part
* Number: 781-110-X01
*
* or contact
*
* APM Support Desk (Intel Corporation, US)
* TEL: (800)628-8686
* FAX: (916)356-6100.
*/
.file "apm_init.S"
#include <machine/asm.h>
#define _LOCORE
#include <machine/biosvar.h>
#include <machine/apmvar.h>
#undef _LOCORE
#include <assym.h>
.globl _C_LABEL(BIOS_regs)
.text
ENTRY(apm_init)
pushl %ebx
/*
* APM installation check
*/
movb $(APM_BIOS), %ah
movb $(APM_INSTCHECK), %al
movl $(PMDV_APMBIOS), %ebx
DOINT(SYSTEM_BIOS) /* call system BIOS */
jnc 1f /* if found, goto 1f */
movl $(APMINI_CANTFIND), %eax
jmp 5f /* can't find APM BIOS */
1:
shll $16, %eax
orw %cx, %ax
rorl $16, %eax
movl _C_LABEL(BIOS_regs)+biosr_bx, %ebx
cmpb $'P', %bh
jne 1f
cmpb $'M', %bl
je 2f
1: movl $(APMINI_BADVER), %eax
jmp 5f /* can't find APM BIOS */
2: testl $(APM_32BIT_SUPPORT), %ecx
jnz 1f /* supports 32bit connection? */
movl $(APMINI_NOT32BIT), %eax
jmp 5f /* don't support 32bit connection */
1:
pushl %eax
/*
* APM Protected Mode 32-bit Interface Connect
*/
movb $(APM_BIOS), %ah
movb $(APM_DISCONNECT), %al /* just in case bootloader connected*/
movl $(PMDV_APMBIOS), %ebx
DOINT(SYSTEM_BIOS)
movb $(APM_BIOS), %ah
movb $(APM_PROT32CONNECT), %al
movl $(PMDV_APMBIOS), %ebx
DOINT(SYSTEM_BIOS)
popl %eax
jnc 5f /* if successed, go to 1f */
movl $(APMINI_CONNECTERR), %eax
5: popl %ebx
ret
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