1 /* $NetBSD: bootinfo_biosgeom.c,v 1.9 2001/07/07 22:57:57 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1997 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author 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 <sys/types.h> 36 #include <machine/disklabel.h> 37 #include <machine/cpu.h> 38 39 #include <lib/libkern/libkern.h> 40 #include <lib/libsa/stand.h> 41 42 #include "libi386.h" 43 #include "biosdisk_ll.h" 44 #include "bootinfo.h" 45 46 void bi_getbiosgeom() 47 { 48 struct btinfo_biosgeom *bibg; 49 int i, j, nvalid; 50 unsigned char nhd; 51 unsigned int cksum; 52 53 pvbcopy((void *)(0x400 + 0x75), &nhd, 1); 54 #ifdef GEOM_DEBUG 55 printf("nhd %d\n", (int)nhd); 56 #endif 57 58 bibg = alloc(sizeof(struct btinfo_biosgeom) 59 + (nhd - 1) * sizeof(struct bi_biosgeom_entry)); 60 if (!bibg) 61 return; 62 63 for (i = nvalid = 0; i < MAX_BIOSDISKS && nvalid < (int)nhd; i++) { 64 struct biosdisk_ll d; 65 struct biosdisk_ext13info ed; 66 char buf[BIOSDISK_SECSIZE]; 67 68 d.dev = 0x80 + i; 69 70 if (set_geometry(&d, &ed)) 71 continue; 72 memset(&bibg->disk[nvalid], 0, sizeof(bibg->disk[nvalid])); 73 74 bibg->disk[nvalid].sec = d.sec; 75 bibg->disk[nvalid].head = d.head; 76 bibg->disk[nvalid].cyl = d.cyl; 77 bibg->disk[nvalid].dev = d.dev; 78 79 if (readsects(&d, 0, 1, buf, 0)) { 80 bibg->disk[nvalid].flags |= BI_GEOM_INVALID; 81 nvalid++; 82 continue; 83 } 84 85 #ifdef GEOM_DEBUG 86 printf("#%d: %x: C %d H %d S %d\n", nvalid, 87 d.dev, d.cyl, d.head, d.sec); 88 #endif 89 90 if (d.flags & BIOSDISK_EXT13) { 91 if (ed.flags & EXT13_GEOM_VALID) 92 bibg->disk[nvalid].totsec = ed.totsec; 93 else 94 bibg->disk[nvalid].totsec = 0; 95 bibg->disk[nvalid].flags |= BI_GEOM_EXTINT13; 96 } 97 for (j = 0, cksum = 0; j < BIOSDISK_SECSIZE; j++) 98 cksum += buf[j]; 99 bibg->disk[nvalid].cksum = cksum; 100 memcpy(bibg->disk[nvalid].dosparts, &buf[MBR_PARTOFF], 101 sizeof(bibg->disk[nvalid].dosparts)); 102 nvalid++; 103 } 104 105 bibg->num = nvalid; 106 107 BI_ADD(bibg, BTINFO_BIOSGEOM, sizeof(struct btinfo_biosgeom) 108 + nvalid * sizeof(struct bi_biosgeom_entry)); 109 } 110