getextmemx.c revision 1.4 1 1.4 dsl /* $NetBSD: getextmemx.c,v 1.4 2003/04/16 15:03:59 dsl Exp $ */
2 1.1 drochner
3 1.1 drochner /*
4 1.2 drochner * Copyright (c) 1997, 1999
5 1.1 drochner * Matthias Drochner. All rights reserved.
6 1.1 drochner *
7 1.1 drochner * Redistribution and use in source and binary forms, with or without
8 1.1 drochner * modification, are permitted provided that the following conditions
9 1.1 drochner * are met:
10 1.1 drochner * 1. Redistributions of source code must retain the above copyright
11 1.1 drochner * notice, this list of conditions and the following disclaimer.
12 1.1 drochner * 2. Redistributions in binary form must reproduce the above copyright
13 1.1 drochner * notice, this list of conditions and the following disclaimer in the
14 1.1 drochner * documentation and/or other materials provided with the distribution.
15 1.1 drochner * 3. All advertising materials mentioning features or use of this software
16 1.1 drochner * must display the following acknowledgement:
17 1.1 drochner * This product includes software developed for the NetBSD Project
18 1.1 drochner * by Matthias Drochner.
19 1.1 drochner * 4. The name of the author may not be used to endorse or promote products
20 1.1 drochner * derived from this software without specific prior written permission.
21 1.1 drochner *
22 1.1 drochner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 1.1 drochner * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 1.1 drochner * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 1.1 drochner * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 1.1 drochner * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 1.1 drochner * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 1.1 drochner * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 1.1 drochner * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 1.1 drochner * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 1.1 drochner * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 1.1 drochner *
33 1.1 drochner */
34 1.1 drochner
35 1.2 drochner /*
36 1.2 drochner * Try 2 more fancy BIOS calls to get the size of extended
37 1.2 drochner * memory besides the classical int15/88, take maximum.
38 1.2 drochner * needs lowlevel parts from biosmemx.S and biosmem.S
39 1.1 drochner */
40 1.1 drochner
41 1.1 drochner #include <lib/libsa/stand.h>
42 1.1 drochner #include "libi386.h"
43 1.1 drochner
44 1.2 drochner extern int getextmem2 __P((int *));
45 1.2 drochner extern int getmementry __P((int *, int *));
46 1.3 jdolecek extern int getextmemps2 __P((void *));
47 1.1 drochner
48 1.2 drochner int
49 1.2 drochner getextmemx()
50 1.1 drochner {
51 1.1 drochner int buf[5], i;
52 1.1 drochner int extmem = getextmem1();
53 1.3 jdolecek #ifdef SUPPORT_PS2
54 1.3 jdolecek struct {
55 1.3 jdolecek uint16_t len;
56 1.3 jdolecek uint32_t dta[8];
57 1.3 jdolecek /* pad to 64 bytes - without this, machine would reset */
58 1.3 jdolecek uint8_t __pad[30];
59 1.3 jdolecek } __attribute__((__packed__)) bufps2;
60 1.3 jdolecek #endif
61 1.1 drochner
62 1.4 dsl #ifdef DEBUG_MEMSIZE
63 1.4 dsl printf("extmem1: %x\n", extmem);
64 1.4 dsl #endif
65 1.2 drochner if (!getextmem2(buf) && buf[0] <= 15 * 1024) {
66 1.1 drochner int help = buf[0];
67 1.2 drochner if (help == 15 * 1024)
68 1.1 drochner help += buf[1] * 64;
69 1.4 dsl #ifdef DEBUG_MEMSIZE
70 1.4 dsl printf("extmem2: %x\n", help);
71 1.4 dsl #endif
72 1.2 drochner if (extmem < help)
73 1.1 drochner extmem = help;
74 1.1 drochner }
75 1.1 drochner
76 1.2 drochner i = 0;
77 1.2 drochner do {
78 1.2 drochner if (getmementry(&i, buf))
79 1.2 drochner break;
80 1.4 dsl #ifdef DEBUG_MEMSIZE
81 1.4 dsl printf("mementry: (%d) %x %x %x %x %x\n",
82 1.4 dsl i, buf[0], buf[1], buf[2], buf[3], buf[4]);
83 1.4 dsl #endif
84 1.2 drochner if ((buf[4] == 1 && buf[0] == 0x100000)
85 1.2 drochner && extmem < buf[2] / 1024)
86 1.1 drochner extmem = buf[2] / 1024;
87 1.2 drochner } while (i);
88 1.3 jdolecek
89 1.3 jdolecek #ifdef SUPPORT_PS2
90 1.3 jdolecek /* use local memory information from RETURN MEMORY-MAP INFORMATION */
91 1.3 jdolecek if (!getextmemps2((void *) &bufps2)) {
92 1.3 jdolecek int help = bufps2.dta[0];
93 1.3 jdolecek if (help == 15 * 1024)
94 1.3 jdolecek help += bufps2.dta[1];
95 1.3 jdolecek if (extmem < help)
96 1.3 jdolecek extmem = help;
97 1.3 jdolecek }
98 1.3 jdolecek #endif
99 1.1 drochner
100 1.2 drochner return (extmem);
101 1.1 drochner }
102