/*
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jaromir Dolecek.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION 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.
*/
#include <machine/asm.h>
.text
/*
* int getextmemps2(void *buffer)
*
* call int 15 function 0xc7 - later PS/2s - RETURN MEMORY-MAP INFORMATION
* return: 0=OK, nonzero=error
* buffer: filled with memory-map table structure
*/
ENTRY(getextmemps2)
.code32
movl %eax,%edx
xorl %eax,%eax
pusha
call _C_LABEL(prot_to_real)
.code16
/* do int15, function 0xc0 call to discover if C7h is supported */
movb $0xc0,%ah
int $0x15
setc %cl
jc out /* 0xc0 not supported if carry set */
/* check feature byte 2, bit 4 to see if return memory map is supported */
movb %es:6(%bx),%al
andb $0x10,%al
jnz getmem /* 0xc7 supported */
/* set %cl to indicate failure, and exit */
movb $2,%cl
jmp out
getmem:
/* move the parameter to right register */
push %ds
movl %edx,%esi
andl $0xf,%esi
shrl $4,%edx
mov %ds,%ax
add %dx,%ax
mov %ax,%ds
/* actually call int15, function 0xc7 now */
movb $0xc7,%ah
int $0x15
setc %cl /* save carry */
pop %ds
