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getextmemx.c revision 1.8
      1  1.8     perry /*	$NetBSD: getextmemx.c,v 1.8 2007/12/25 18:33:34 perry 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  *
     16  1.1  drochner  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.1  drochner  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.1  drochner  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.1  drochner  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.1  drochner  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  1.1  drochner  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  1.1  drochner  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  1.1  drochner  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  1.1  drochner  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  1.1  drochner  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  1.1  drochner  *
     27  1.1  drochner  */
     28  1.1  drochner 
     29  1.2  drochner /*
     30  1.2  drochner  * Try 2 more fancy BIOS calls to get the size of extended
     31  1.2  drochner  * memory besides the classical int15/88, take maximum.
     32  1.2  drochner  * needs lowlevel parts from biosmemx.S and biosmem.S
     33  1.1  drochner  */
     34  1.1  drochner 
     35  1.1  drochner #include <lib/libsa/stand.h>
     36  1.1  drochner #include "libi386.h"
     37  1.1  drochner 
     38  1.2  drochner extern int getextmem2 __P((int *));
     39  1.2  drochner extern int getmementry __P((int *, int *));
     40  1.3  jdolecek extern int getextmemps2 __P((void *));
     41  1.1  drochner 
     42  1.2  drochner int
     43  1.2  drochner getextmemx()
     44  1.1  drochner {
     45  1.1  drochner 	int buf[5], i;
     46  1.1  drochner 	int extmem = getextmem1();
     47  1.3  jdolecek #ifdef SUPPORT_PS2
     48  1.3  jdolecek 	struct {
     49  1.3  jdolecek 		uint16_t len;
     50  1.3  jdolecek 		uint32_t dta[8];
     51  1.3  jdolecek 		/* pad to 64 bytes - without this, machine would reset */
     52  1.3  jdolecek 		uint8_t __pad[30];
     53  1.8     perry 	} __packed bufps2;
     54  1.3  jdolecek #endif
     55  1.1  drochner 
     56  1.4       dsl #ifdef DEBUG_MEMSIZE
     57  1.5       dsl 	printf("extmem1: %xk\n", extmem);
     58  1.4       dsl #endif
     59  1.5       dsl 	if (!getextmem2(buf)) {
     60  1.4       dsl #ifdef DEBUG_MEMSIZE
     61  1.5       dsl 		printf("extmem2: %xk + %xk\n", buf[0], buf[1] * 64);
     62  1.4       dsl #endif
     63  1.5       dsl 		if (buf[0] <= 15 * 1024) {
     64  1.5       dsl 			int help = buf[0];
     65  1.5       dsl 			if (help == 15 * 1024)
     66  1.5       dsl 				help += buf[1] * 64;
     67  1.5       dsl 			if (extmem < help)
     68  1.5       dsl 				extmem = help;
     69  1.5       dsl 		}
     70  1.1  drochner 	}
     71  1.1  drochner 
     72  1.2  drochner 	i = 0;
     73  1.2  drochner 	do {
     74  1.2  drochner 		if (getmementry(&i, buf))
     75  1.2  drochner 			break;
     76  1.4       dsl #ifdef DEBUG_MEMSIZE
     77  1.4       dsl 		printf("mementry: (%d) %x %x %x %x %x\n",
     78  1.4       dsl 			i, buf[0], buf[1], buf[2], buf[3], buf[4]);
     79  1.4       dsl #endif
     80  1.2  drochner 		if ((buf[4] == 1 && buf[0] == 0x100000)
     81  1.2  drochner 		    && extmem < buf[2] / 1024)
     82  1.1  drochner 			extmem = buf[2] / 1024;
     83  1.2  drochner 	} while (i);
     84  1.3  jdolecek 
     85  1.3  jdolecek #ifdef SUPPORT_PS2
     86  1.3  jdolecek 	/* use local memory information from RETURN MEMORY-MAP INFORMATION */
     87  1.3  jdolecek 	if (!getextmemps2((void *) &bufps2)) {
     88  1.3  jdolecek 		int help = bufps2.dta[0];
     89  1.3  jdolecek 		if (help == 15 * 1024)
     90  1.3  jdolecek 			help += bufps2.dta[1];
     91  1.3  jdolecek 		if (extmem < help)
     92  1.3  jdolecek 			extmem = help;
     93  1.3  jdolecek 	}
     94  1.3  jdolecek #endif
     95  1.1  drochner 
     96  1.2  drochner 	return (extmem);
     97  1.1  drochner }
     98