1 /* $NetBSD: bootinfo_memmap.c,v 1.8 2024/08/24 20:23:11 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 1999 5 * Matthias Drochner. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <lib/libsa/stand.h> 30 #include "libi386.h" 31 #include "bootinfo.h" 32 33 struct btinfo_memmap *btinfo_memmap = NULL; 34 35 extern int getmementry(int *, int *); 36 37 void 38 bi_getmemmap(void) 39 { 40 /* 41 * Allocate 6 words, not 5, to work around buggy firmware -- 42 * see comment on getmementry in biosmemx.S. 43 */ 44 int buf[6], i, nranges, n; 45 46 nranges = 0; 47 i = 0; 48 do { 49 if (getmementry(&i, buf)) 50 break; 51 nranges++; 52 } while (i); 53 54 btinfo_memmap = alloc(sizeof(struct btinfo_memmap) 55 + (nranges - 1) * sizeof(struct bi_memmap_entry)); 56 57 i = 0; 58 for (n = 0; n < nranges; n++) { 59 getmementry(&i, buf); 60 memcpy(&btinfo_memmap->entry[n], buf, 61 sizeof(struct bi_memmap_entry)); 62 } 63 btinfo_memmap->num = nranges; 64 65 BI_ADD(btinfo_memmap, BTINFO_MEMMAP, sizeof(struct btinfo_memmap) 66 + (nranges - 1) * sizeof(struct bi_memmap_entry)); 67 } 68