sys/arch/arc/stand/boot/boot.c

   1 /*      $NetBSD: boot.c,v 1.5 2006/07/22 18:15:06 tsutsui 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 <lib/libsa/stand.h>
  67 #include <lib/libsa/loadfile.h>
  68 #include <lib/libkern/libkern.h>
  69
  70 #include <sys/param.h>
  71 #include <sys/exec.h>
  72 #include <sys/exec_elf.h>
  73 #include <sys/boot_flag.h>
  74
  75 #include <dev/arcbios/arcbios.h>
  76
  77 #include "common.h"
  78 #include "bootinfo.h"
  79
  80 #ifdef BOOT_DEBUG
  81 #define DPRINTF if (debug) printf
  82 #else
  83 #define DPRINTF while (/*CONSTCOND*/0) printf
  84 #endif
  85
  86 /*
  87  * We won't go overboard with gzip'd kernel names.  After all we can
  88  * still boot a gzip'd kernel called "netbsd.arc" - it doesn't need
  89  * the .gz suffix.
  90  *
  91  * For arcane reasons, the first byte of the first element of this struct will
  92  * contain a zero.  We therefore start from one.
  93  */
  94
  95 char *kernelnames[] = {
  96         "placekeeper",
  97         "netbsd.arc",
  98         "netbsd",
  99         "netbsd.gz",
 100         "netbsd.bak",
 101         "netbsd.old",
 102         "onetbsd",
 103         "gennetbsd",
 104         NULL
 105 };
 106
 107 static int debug = 0;
 108 static char **environment;
 109
 110 /* Storage must be static. */
 111 struct btinfo_symtab bi_syms;
 112 struct btinfo_bootpath bi_bpath;
 113
 114 static char bootinfo[BOOTINFO_SIZE];
 115
 116 extern const struct arcbios_fv *ARCBIOS;
 117
 118 int main(int, char **);
 119 static char *firmware_getenv(char *);
 120
 121 /*
 122  * This gets arguments from the ARCS monitor, calls ARCS routines to open
 123  * and load the program to boot, then transfers execution to the new program.
 124  *
 125  * argv[0] will be the ARCS path to the bootloader (i.e.,
 126  * "scsi(0)disk(2)rdisk(0)partition(1)\boot").
 127  *
 128  * argv[1] through argv[n] will contain arguments passed from the PROM, if any.
 129  */
 130
 131 int
 132 main(int argc, char **argv)
 133 {
 134         const char     *kernel = NULL;
 135         const char     *bootpath = NULL;
 136         char            bootfile[PATH_MAX];
 137         void            (*entry)(int, char *[], u_int, void *);
 138         u_long          marks[MARK_MAX];
 139         int             win = 0;
 140         int             i;
 141         int             ch;
 142
 143         /* print a banner */
 144         printf("\n");
 145         printf("%s Bootstrap, Revision %s\n", bootprog_name, bootprog_rev);
 146         printf("(%s, %s)\n", bootprog_maker, bootprog_date);
 147
 148         memset(marks, 0, sizeof marks);
 149
 150         /* initialise bootinfo structure early */
 151         bi_init(bootinfo);
 152
 153 #ifdef BOOT_DEBUG
 154         for (i = 0; i < argc; i++)
 155                 printf("argv[%d] = %s\n", i, argv[i]);
 156 #endif
 157
 158         /* Parse arguments, if present.  */
 159         while ((ch = getopt(argc, argv, "v")) != -1) {
 160                 switch (ch) {
 161                 case 'v':
 162                         debug = 1;
 163                         break;
 164                 }
 165         }
 166
 167         environment = &argv[1];
 168
 169         bootpath = firmware_getenv("OSLoadPartition");
 170         if (bootpath == NULL)
 171                 bootpath =
 172                     (*ARCBIOS->GetEnvironmentVariable)("OSLoadPartition");
 173
 174         if (bootpath == NULL) {
 175                 /* XXX need to actually do the fixup */
 176                 printf("OSLoadPartition is not specified.\n");
 177                 return 0;
 178         }
 179         DPRINTF("bootpath = %s\n", bootpath);
 180
 181         /*
 182          * Grab OSLoadFilename from ARCS.
 183          */
 184
 185         kernel = firmware_getenv("OSLoadFilename");
 186         if (kernel == NULL)
 187                 kernel = (*ARCBIOS->GetEnvironmentVariable)("OSLoadFilename");
 188
 189         DPRINTF("kernel = %s\n", kernel ? kernel : "<null>");
 190
 191         /*
 192          * The first arg is assumed to contain the name of the kernel to boot,
 193          * if it a) does not start with a hyphen and b) does not contain
 194          * an equals sign.
 195          */
 196
 197         for (i = 1; i < argc; i++) {
 198                 if (((strchr(argv[i], '=')) == NULL) && (argv[i][0] != '-')) {
 199                         kernel = argv[i];
 200                         break;
 201                 }
 202         }
 203
 204         if (kernel != NULL) {
 205                 /*
 206                  * if the name contains parenthesis, we assume that it
 207                  * contains the bootpath and ignore anything passed through
 208                  * the environment
 209                  */
 210                 if (strchr(kernel, '('))
 211                         win = loadfile(kernel, marks, LOAD_KERNEL);
 212                 else {
 213                         strcpy(bootfile, bootpath);
 214                         strcat(bootfile, kernel);
 215                         win = loadfile(bootfile, marks, LOAD_KERNEL);
 216                 }
 217
 218         } else {
 219                 i = 1;
 220                 while (kernelnames[i] != NULL) {
 221                         strcpy(bootfile, bootpath);
 222                         strcat(bootfile, kernelnames[i]);
 223                         kernel = kernelnames[i];
 224                         win = loadfile(bootfile, marks, LOAD_KERNEL);
 225                         if (win != -1)
 226                                 break;
 227                         i++;
 228                 }
 229
 230         }
 231
 232         if (win < 0) {
 233                 printf("Boot failed!  Halting...\n");
 234                 (void)getchar();
 235                 return 0;
 236         }
 237
 238         strlcpy(bi_bpath.bootpath, kernel, BTINFO_BOOTPATH_LEN);
 239         bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath));
 240
 241         bi_syms.nsym = marks[MARK_NSYM];
 242         bi_syms.ssym = marks[MARK_SYM];
 243         bi_syms.esym = marks[MARK_END];
 244         bi_add(&bi_syms, BTINFO_SYMTAB, sizeof(bi_syms));
 245
 246         entry = (void *)marks[MARK_ENTRY];
 247
 248         if (debug) {
 249                 printf("Starting at %p\n\n", entry);
 250                 printf("nsym 0x%lx ssym 0x%lx esym 0x%lx\n", marks[MARK_NSYM],
 251                        marks[MARK_SYM], marks[MARK_END]);
 252         }
 253         (*entry)(argc, argv, BOOTINFO_MAGIC, bootinfo);
 254
 255         printf("Kernel returned!  Halting...\n");
 256         return 0;
 257 }
 258
 259 char *
 260 firmware_getenv(char *envname)
 261 {
 262         char **env;
 263         int len;
 264
 265         len = strlen(envname);
 266
 267         for (env = environment; env[0]; env++) {
 268                 if (strncasecmp(envname, env[0], len) == 0 &&
 269                     env[0][len] == '=') {
 270                         return &env[0][len + 1];
 271                 }
 272         }
 273         return NULL;
 274 }
 275
 276 void
 277 _rtt(void)
 278 {
 279
 280         (*ARCBIOS->Halt)();
 281 }