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/* $NetBSD: biosmem.S,v 1.5 1997/08/18 22:44:01 hannken Exp $ */
/*
* Copyright (c) 1996
* Perry E. Metzger. 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 acknowledgements:
* This product includes software developed for the NetBSD Project
* by Perry E. Metzger.
* 4. The names of the authors 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 AUTHOR 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.
*
*/
#include <machine/asm.h>
#define data32 .byte 0x66
.text
/* get mem below 1M, in kByte */
ENTRY(getbasemem)
pushl %ebp
movl %esp,%ebp
pushl %ebx
push %esi
push %edi
call CNAME(prot_to_real)
int $0x12
# zero-extend 16-bit result to 32 bits.
data32
movl $0, %ebx
mov %eax,%ebx # !!! at run time, it is mov %ax,%bx
data32
call CNAME(real_to_prot)
movl %ebx, %eax
pop %edi
pop %esi
popl %ebx
popl %ebp
ret
/* get mem above 1M, in kByte */
ENTRY(getextmem)
pushl %ebp
movl %esp,%ebp
pushl %ebx
push %esi
push %edi
call CNAME(prot_to_real)
movb $0x88,%ah
int $0x15
# zero-extend 16-bit result to 32 bits.
data32
movl $0, %ebx
mov %eax,%ebx # !!! at run time, it is mov %ax,%bx
data32
call CNAME(real_to_prot)
movl %ebx, %eax
pop %edi
pop %esi
popl %ebx
popl %ebp
ret
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