biosmem.S revision 1.7 1 /* $NetBSD: biosmem.S,v 1.7 2005/07/06 19:27:50 junyoung Exp $ */
2
3 /*
4 * Copyright (c) 1996
5 * Perry E. Metzger. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgements:
17 * This product includes software developed for the NetBSD Project
18 * by Perry E. Metzger.
19 * 4. The names of the authors may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35 #include <machine/asm.h>
36
37 .text
38
39 /* get mem below 1M, in kByte */
40
41 ENTRY(getbasemem)
42 pushl %ebp
43 movl %esp,%ebp
44 pushl %ebx
45 push %esi
46 push %edi
47
48 call _C_LABEL(prot_to_real)
49 .code16
50
51 int $0x12
52 # zero-extend 16-bit result to 32 bits.
53 movl $0, %ebx
54 mov %ax,%bx
55
56 calll _C_LABEL(real_to_prot)
57 .code32
58
59 movl %ebx, %eax
60
61 pop %edi
62 pop %esi
63 popl %ebx
64 popl %ebp
65 ret
66
67 /* get mem above 1M, in kByte */
68
69 ENTRY(getextmem1)
70 pushl %ebp
71 movl %esp,%ebp
72 pushl %ebx
73 push %esi
74 push %edi
75
76 call _C_LABEL(prot_to_real)
77 .code16
78
79 movb $0x88,%ah
80 int $0x15
81
82 # zero-extend 16-bit result to 32 bits.
83 movl $0, %ebx
84 mov %ax,%bx
85
86 calll _C_LABEL(real_to_prot)
87 .code32
88
89 movl %ebx, %eax
90
91 pop %edi
92 pop %esi
93 popl %ebx
94 popl %ebp
95 ret
96
97