sys/arch/pmax/stand/common/bootxx.c

   1 /*      $NetBSD: bootxx.c,v 1.32 2009/03/14 15:36:12 dsl Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jonathan Stone, Michael Hitch and Simon Burge.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1992, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Ralph Campbell.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)boot.c      8.1 (Berkeley) 6/10/93
  64  */
  65
  66 #include <sys/param.h>
  67 #include <sys/exec_elf.h>
  68 #include <lib/libsa/stand.h>
  69 #include <lib/libkern/libkern.h>
  70 #include <machine/dec_prom.h>
  71
  72 typedef void (*entrypt)(int, char **, int, const void *);
  73
  74 int main(int, char **);
  75 entrypt loadfile(char *path, char *name);
  76
  77 extern int clear_cache(char *addr, int len);
  78
  79 /*
  80  * This gets arguments from the PROM, calls other routines to open
  81  * and load the secondary boot loader called boot, and then transfers
  82  * execution to that program.
  83  *
  84  * Argv[0] should be something like "rz(0,0,0)netbsd" on a DECstation 3100.
  85  * Argv[0,1] should be something like "boot 5/rz0/netbsd" on a DECstation 5000.
  86  * The argument "-a" means netbsd should do an automatic reboot.
  87  */
  88 int
  89 main(int argc, char **argv)
  90 {
  91         char *cp;
  92         entrypt entry;
  93
  94         /* check for DS5000 boot */
  95         if (strcmp(argv[0], "boot") == 0) {
  96                 argc--;
  97                 argv++;
  98         }
  99         cp = *argv;
 100
 101         printf("\nNetBSD/pmax " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n");
 102
 103         entry = loadfile(cp, "/boot.pmax");
 104         if ((int)entry != -1)
 105                 goto goodload;
 106
 107         /* Give old /boot a go... */
 108         entry = loadfile(cp, "/boot");
 109         if ((int)entry != -1)
 110                 goto goodload;
 111
 112         /* Booting off an 8.3 filesystem? */
 113         entry = loadfile(cp, "/boot.pma");
 114         if ((int)entry != -1)
 115                 goto goodload;
 116
 117         goto bad;
 118 goodload:
 119
 120         clear_cache((char *)PRIMARY_LOAD_ADDRESS, 1024 * 1024);
 121         if (callv == &callvec)
 122                 entry(argc, argv, 0, 0);
 123         else
 124                 entry(argc, argv, DEC_PROM_MAGIC, callv);
 125 bad:
 126         /* XXX would calling prom_halt here be cleaner? */
 127         return (1);
 128 }
 129
 130 /*
 131  * Open 'filename', read in program and return the entry point or -1 if error.
 132  */
 133 entrypt
 134 loadfile(char *path, char *name)
 135 {
 136         int fd, i;
 137         char c, *buf, bootfname[64];
 138         Elf32_Ehdr ehdr;
 139         Elf32_Phdr phdr;
 140
 141         strcpy(bootfname, path);
 142         buf = bootfname;
 143         while ((c = *buf++) != '\0') {
 144                 if (c == ')')
 145                         break;
 146                 if (c != '/')
 147                         continue;
 148                 while ((c = *buf++) != '\0')
 149                         if (c == '/')
 150                                 break;
 151                 /*
 152                  * Make "N/rzY" with no trailing '/' valid by adding
 153                  * the extra '/' before appending 'bootpmax' to the path.
 154                  */
 155                 if (c != '/') {
 156                         buf--;
 157                         *buf++ = '/';
 158                         *buf = '\0';
 159                 }
 160                 break;
 161         }
 162         strcpy(buf, name);
 163         if ((fd = open(bootfname, 0)) < 0) {
 164                 printf("open %s: %d\n", bootfname, errno);
 165                 goto err;
 166         }
 167
 168         /* read the exec header */
 169         i = read(fd, (char *)&ehdr, sizeof(ehdr));
 170         if ((i != sizeof(ehdr)) ||
 171             (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) ||
 172             (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) {
 173                 printf("%s: No ELF header\n", bootfname);
 174                 goto cerr;
 175         }
 176
 177         for (i = 0; i < ehdr.e_phnum; i++) {
 178                 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0)
 179                         goto cerr;
 180                 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr))
 181                         goto cerr;
 182                 if (phdr.p_type != PT_LOAD)
 183                         continue;
 184                 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0)
 185                         goto cerr;
 186                 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz)
 187                         goto cerr;
 188         }
 189         return ((entrypt)ehdr.e_entry);
 190
 191 cerr:
 192 #ifndef LIBSA_NO_FS_CLOSE
 193         (void) close(fd);
 194 #endif
 195 err:
 196         printf("Can't load '%s'\n", bootfname);
 197         return ((entrypt)-1);
 198 }