1 /* $NetBSD: biosmemps2.S,v 1.6 2011/06/16 13:27:59 joerg Exp $ */
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
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11 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
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17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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32 #include <machine/asm.h>
36 /* int getextmemp2(void buffer)
37 call int 15 function 0xc7 - later PS/2s - RETURN MEMORY-MAP INFORMATION
38 return: 0=OK, nonzero=error
39 buffer: filled with memory-map table structure
47 call _C_LABEL(prot_to_real)
50 # do int15, function 0xc0 call to discover if C7h is supported
54 jc out # 0xc0 not supported if carry set
56 # check feature byte 2, bit 4 to see if return memory map is supported
59 jnz getmem # 0xc7 supported
61 # set %cl to indicate failure, and exit
66 # move the parameter to right register
75 # actually call int15, function 0xc7 now
82 calll _C_LABEL(real_to_prot)