1 /* $NetBSD: exec.c,v 1.14 1999/09/07 18:27:58 ross Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1996 7 * Matthias Drochner. All rights reserved. 8 * Copyright (c) 1996 9 * Perry E. Metzger. All rights reserved. 10 * Copyright (c) 1997 11 * Martin Husemann. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)boot.c 8.1 (Berkeley) 6/10/93 42 */ 43 44 /* 45 * starts NetBSD a.out kernel 46 * needs lowlevel startup from startprog.S 47 * This is a special version of exec.c to support use of XMS. 48 */ 49 50 #include <sys/param.h> 51 #include <sys/reboot.h> 52 #ifdef COMPAT_OLDBOOT 53 #include <sys/disklabel.h> 54 #endif 55 56 #include <lib/libsa/stand.h> 57 58 #include "loadfile.h" 59 #include "libi386.h" 60 #include "bootinfo.h" 61 62 #ifdef COMPAT_OLDBOOT 63 static int dev2major __P((char *, int *)); 64 65 static int 66 dev2major(devname, major) 67 char *devname; 68 int *major; 69 { 70 static char *devices[] = {"wd", "", "fd", "", "sd"}; 71 #define NUMDEVICES (sizeof(devices)/sizeof(char *)) 72 int i; 73 74 for (i = 0; i < NUMDEVICES; i++) 75 if (!strcmp(devname, devices[i])) { 76 *major = i; 77 return (0); 78 } 79 return (-1); 80 } 81 #endif 82 #define BOOT_NARGS 6 83 84 extern struct btinfo_console btinfo_console; 85 86 int 87 exec_netbsd(file, loadaddr, boothowto) 88 const char *file; 89 physaddr_t loadaddr; 90 int boothowto; 91 { 92 u_long boot_argv[BOOT_NARGS]; 93 int fd; 94 u_long marks[MARK_MAX]; 95 struct btinfo_symtab btinfo_symtab; 96 u_long extmem; 97 #ifdef XMS 98 u_long xmsmem; 99 physaddr_t origaddr = loadaddr; 100 #endif 101 102 #ifdef COMPAT_OLDBOOT 103 char *fsname, *devname; 104 int unit, part; 105 const char *filename; 106 int bootdevnr; 107 #endif 108 109 #ifdef DEBUG 110 printf("exec: file=%s loadaddr=0x%lx\n", 111 file ? file : "NULL", loadaddr); 112 #endif 113 114 BI_ALLOC(6); /* ??? */ 115 116 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 117 118 extmem = getextmem(); 119 120 #ifdef XMS 121 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 122 u_long kernsize; 123 124 /* 125 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 126 * getextmem() is getextmem1(). Without, the "smart" 127 * methods could fail to report all memory as well. 128 * xmsmem is a few kB less than the actual size, but 129 * better than nothing. 130 */ 131 if (xmsmem > extmem) 132 extmem = xmsmem; 133 /* 134 * Get the size of the kernel 135 */ 136 marks[MARK_START] = loadaddr; 137 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 138 goto out; 139 close(fd); 140 141 kernsize = marks[MARK_END]; 142 kernsize = (kernsize + 1023) / 1024; 143 144 loadaddr = xmsalloc(kernsize); 145 if (!loadaddr) 146 return(ENOMEM); 147 } 148 #endif 149 marks[MARK_START] = loadaddr; 150 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 151 goto out; 152 153 boot_argv[0] = boothowto; 154 155 #ifdef COMPAT_OLDBOOT 156 /* prepare boot device information for kernel */ 157 if (parsebootfile(file, &fsname, &devname, &unit, &part, &filename) 158 || strcmp(fsname, "ufs")) 159 bootdevnr = 0; /* XXX error out if parse error??? */ 160 else { 161 int major; 162 163 if (strcmp(devname, "hd") == 0) { 164 /* generic BIOS disk, have to guess type */ 165 struct open_file *f = &files[fd]; /* XXX */ 166 167 if (biosdisk_gettype(f) == DTYPE_SCSI) 168 devname = "sd"; 169 else 170 devname = "wd"; 171 172 /* 173 * The old boot block performed the following 174 * conversion: 175 * 176 * hdN -> Xd0 177 * 178 * where X is the type specified by the label. 179 * We mimmick that here, for lack of any better 180 * way of doing things. 181 */ 182 unit = 0; 183 } 184 185 if (dev2major(devname, &major)) 186 bootdevnr = 0; /* XXX error out??? */ 187 else 188 bootdevnr = MAKEBOOTDEV(major, 0, 0, unit, part); 189 } 190 191 boot_argv[1] = bootdevnr; 192 #else 193 boot_argv[1] = 0; 194 #endif 195 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 196 /* argv[3] below */ 197 boot_argv[4] = extmem; 198 boot_argv[5] = getbasemem(); 199 200 close(fd); 201 202 /* 203 * Gather some information for the kernel. Do this after the 204 * "point of no return" to avoid memory leaks. 205 * (but before DOS might be trashed in the XMS case) 206 */ 207 #ifdef PASS_BIOSGEOM 208 bi_getbiosgeom(); 209 #endif 210 #ifdef PASS_MEMMAP 211 bi_getmemmap(); 212 #endif 213 214 #ifdef XMS 215 if (loadaddr != origaddr) { 216 /* 217 * We now have done our last DOS IO, so we may 218 * trash the OS. Copy the data from the temporary 219 * buffer to its real adress. 220 */ 221 marks[MARK_START] -= loadaddr; 222 marks[MARK_END] -= loadaddr; 223 marks[MARK_SYM] -= loadaddr; 224 marks[MARK_END] -= loadaddr; 225 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 226 } 227 #endif 228 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 229 (-sizeof(int)); 230 231 boot_argv[3] = marks[MARK_END]; 232 233 234 #ifdef DEBUG 235 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 236 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 237 #endif 238 239 btinfo_symtab.nsym = marks[MARK_NSYM]; 240 btinfo_symtab.ssym = marks[MARK_SYM]; 241 btinfo_symtab.esym = marks[MARK_END]; 242 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 243 244 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 0x90000); 245 panic("exec returned"); 246 247 out: 248 BI_FREE(); 249 bootinfo = 0; 250 return (-1); 251 } 252