1*58a2b000SEvgeniy Ivanov /* $NetBSD: getextmemx.c,v 1.10 2011/06/16 13:27:59 joerg Exp $ */
2*58a2b000SEvgeniy Ivanov
3*58a2b000SEvgeniy Ivanov /*
4*58a2b000SEvgeniy Ivanov * Copyright (c) 1997, 1999
5*58a2b000SEvgeniy Ivanov * Matthias Drochner. All rights reserved.
6*58a2b000SEvgeniy Ivanov *
7*58a2b000SEvgeniy Ivanov * Redistribution and use in source and binary forms, with or without
8*58a2b000SEvgeniy Ivanov * modification, are permitted provided that the following conditions
9*58a2b000SEvgeniy Ivanov * are met:
10*58a2b000SEvgeniy Ivanov * 1. Redistributions of source code must retain the above copyright
11*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer.
12*58a2b000SEvgeniy Ivanov * 2. Redistributions in binary form must reproduce the above copyright
13*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer in the
14*58a2b000SEvgeniy Ivanov * documentation and/or other materials provided with the distribution.
15*58a2b000SEvgeniy Ivanov *
16*58a2b000SEvgeniy Ivanov * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17*58a2b000SEvgeniy Ivanov * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18*58a2b000SEvgeniy Ivanov * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19*58a2b000SEvgeniy Ivanov * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20*58a2b000SEvgeniy Ivanov * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21*58a2b000SEvgeniy Ivanov * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22*58a2b000SEvgeniy Ivanov * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23*58a2b000SEvgeniy Ivanov * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24*58a2b000SEvgeniy Ivanov * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25*58a2b000SEvgeniy Ivanov * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*58a2b000SEvgeniy Ivanov *
27*58a2b000SEvgeniy Ivanov */
28*58a2b000SEvgeniy Ivanov
29*58a2b000SEvgeniy Ivanov /*
30*58a2b000SEvgeniy Ivanov * Try 2 more fancy BIOS calls to get the size of extended
31*58a2b000SEvgeniy Ivanov * memory besides the classical int15/88, take maximum.
32*58a2b000SEvgeniy Ivanov * needs lowlevel parts from biosmemx.S and biosmem.S
33*58a2b000SEvgeniy Ivanov */
34*58a2b000SEvgeniy Ivanov
35*58a2b000SEvgeniy Ivanov #include <lib/libsa/stand.h>
36*58a2b000SEvgeniy Ivanov #include "libi386.h"
37*58a2b000SEvgeniy Ivanov
38*58a2b000SEvgeniy Ivanov int
getextmemx(void)39*58a2b000SEvgeniy Ivanov getextmemx(void)
40*58a2b000SEvgeniy Ivanov {
41*58a2b000SEvgeniy Ivanov int buf[5], i;
42*58a2b000SEvgeniy Ivanov int extmem = getextmem1();
43*58a2b000SEvgeniy Ivanov #ifdef SUPPORT_PS2
44*58a2b000SEvgeniy Ivanov struct {
45*58a2b000SEvgeniy Ivanov uint16_t len;
46*58a2b000SEvgeniy Ivanov uint32_t dta[8];
47*58a2b000SEvgeniy Ivanov /* pad to 64 bytes - without this, machine would reset */
48*58a2b000SEvgeniy Ivanov uint8_t __pad[30];
49*58a2b000SEvgeniy Ivanov } __packed bufps2;
50*58a2b000SEvgeniy Ivanov #endif
51*58a2b000SEvgeniy Ivanov
52*58a2b000SEvgeniy Ivanov #ifdef DEBUG_MEMSIZE
53*58a2b000SEvgeniy Ivanov printf("extmem1: %xk\n", extmem);
54*58a2b000SEvgeniy Ivanov #endif
55*58a2b000SEvgeniy Ivanov if (!getextmem2(buf)) {
56*58a2b000SEvgeniy Ivanov #ifdef DEBUG_MEMSIZE
57*58a2b000SEvgeniy Ivanov printf("extmem2: %xk + %xk\n", buf[0], buf[1] * 64);
58*58a2b000SEvgeniy Ivanov #endif
59*58a2b000SEvgeniy Ivanov if (buf[0] <= 15 * 1024) {
60*58a2b000SEvgeniy Ivanov int help = buf[0];
61*58a2b000SEvgeniy Ivanov if (help == 15 * 1024)
62*58a2b000SEvgeniy Ivanov help += buf[1] * 64;
63*58a2b000SEvgeniy Ivanov if (extmem < help)
64*58a2b000SEvgeniy Ivanov extmem = help;
65*58a2b000SEvgeniy Ivanov }
66*58a2b000SEvgeniy Ivanov }
67*58a2b000SEvgeniy Ivanov
68*58a2b000SEvgeniy Ivanov i = 0;
69*58a2b000SEvgeniy Ivanov do {
70*58a2b000SEvgeniy Ivanov if (getmementry(&i, buf))
71*58a2b000SEvgeniy Ivanov break;
72*58a2b000SEvgeniy Ivanov #ifdef DEBUG_MEMSIZE
73*58a2b000SEvgeniy Ivanov printf("mementry: (%d) %x %x %x %x %x\n",
74*58a2b000SEvgeniy Ivanov i, buf[0], buf[1], buf[2], buf[3], buf[4]);
75*58a2b000SEvgeniy Ivanov #endif
76*58a2b000SEvgeniy Ivanov if ((buf[4] == 1 && buf[0] == 0x100000)
77*58a2b000SEvgeniy Ivanov && extmem < buf[2] / 1024)
78*58a2b000SEvgeniy Ivanov extmem = buf[2] / 1024;
79*58a2b000SEvgeniy Ivanov } while (i);
80*58a2b000SEvgeniy Ivanov
81*58a2b000SEvgeniy Ivanov #ifdef SUPPORT_PS2
82*58a2b000SEvgeniy Ivanov /* use local memory information from RETURN MEMORY-MAP INFORMATION */
83*58a2b000SEvgeniy Ivanov if (!getextmemps2((void *) &bufps2)) {
84*58a2b000SEvgeniy Ivanov int help = bufps2.dta[0];
85*58a2b000SEvgeniy Ivanov if (help == 15 * 1024)
86*58a2b000SEvgeniy Ivanov help += bufps2.dta[1];
87*58a2b000SEvgeniy Ivanov if (extmem < help)
88*58a2b000SEvgeniy Ivanov extmem = help;
89*58a2b000SEvgeniy Ivanov }
90*58a2b000SEvgeniy Ivanov #endif
91*58a2b000SEvgeniy Ivanov
92*58a2b000SEvgeniy Ivanov return extmem;
93*58a2b000SEvgeniy Ivanov }
94