sys/arch/sparc/stand/bootxx/bootxx.c

   1 /*      $NetBSD: bootxx.c,v 1.24 2009/08/23 08:51:56 he Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Paul Kranenburg.
   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 #include <sys/param.h>
  33 #include <sys/exec.h>
  34 #include <sys/exec_aout.h>
  35 #include <sys/bootblock.h>
  36
  37 #include <lib/libkern/libkern.h>
  38 #include <lib/libsa/stand.h>
  39
  40 #include <machine/promlib.h>
  41 #include <sparc/stand/common/promdev.h>
  42
  43 int debug;
  44 int netif_debug;
  45
  46 /*
  47  * Boot device is derived from ROM provided information.
  48  */
  49 const char              progname[] = "bootxx";
  50 struct open_file        io;
  51
  52 /*
  53  * The contents of the bbinfo below are set by installboot(8)
  54  * to hold the filesystem data of the second-stage boot program
  55  * (typically `/boot'): filesystem block size, # of filesystem
  56  * blocks and the block numbers themselves.
  57  */
  58 struct shared_bbinfo bbinfo = {
  59         { SPARC_BBINFO_MAGIC },
  60         0,
  61         SHARED_BBINFO_MAXBLOCKS,
  62         { 0 }
  63 };
  64
  65 int     main(void);
  66 void    loadboot(struct open_file *, char *);
  67
  68 int
  69 main(void)
  70 {
  71         char    *dummy1;
  72         const char      *dummy;
  73         void (*entry)(void *) = (void (*)(void *))PROM_LOADADDR;
  74         void    *arg;
  75
  76 #ifdef HEAP_VARIABLE
  77         {
  78                 extern char end[];
  79                 setheap((void *)ALIGN(end), (void *)0xffffffff);
  80         }
  81 #endif
  82         prom_init();
  83         dummy = prom_getbootpath();
  84         if (dummy && *dummy != '\0')
  85                 strcpy(prom_bootdevice, dummy);
  86         io.f_flags = F_RAW;
  87         if (devopen(&io, 0, &dummy1)) {
  88                 panic("%s: can't open device `%s'", progname,
  89                         prom_bootdevice != NULL ? prom_bootdevice : "unknown");
  90         }
  91
  92         (void)loadboot(&io, (void *)PROM_LOADADDR);
  93         (io.f_dev->dv_close)(&io);
  94
  95         arg = (prom_version() == PROM_OLDMON) ? (void *)PROM_LOADADDR : romp;
  96         (*entry)(arg);
  97         _rtt();
  98 }
  99
 100 void
 101 loadboot(struct open_file *f, char *addr)
 102 {
 103         int     i;
 104         char    *buf;
 105         size_t          n;
 106         daddr_t         blk;
 107
 108         /*
 109          * Allocate a buffer that we can map into DVMA space; only
 110          * needed for sun4 architecture, but use it for all machines
 111          * to keep code size down as much as possible.
 112          */
 113         buf = alloc(bbinfo.bbi_block_size);
 114         if (buf == NULL)
 115                 panic("%s: alloc failed", progname);
 116
 117         for (i = 0; i < bbinfo.bbi_block_count; i++) {
 118                 if ((blk = bbinfo.bbi_block_table[i]) == 0)
 119                         panic("%s: block table corrupt", progname);
 120
 121 #ifdef DEBUG
 122                 printf("%s: block # %d = %d\n", progname, i, blk);
 123 #endif
 124                 if ((f->f_dev->dv_strategy)(f->f_devdata, F_READ, blk,
 125                     bbinfo.bbi_block_size, buf, &n)) {
 126                         printf("%s: read failure", progname);
 127                         _rtt();
 128                 }
 129                 memcpy(addr, buf, bbinfo.bbi_block_size);
 130                 if (n != bbinfo.bbi_block_size)
 131                         panic("%s: short read", progname);
 132                 if (i == 0) {
 133                         int m = N_GETMAGIC(*(struct exec *)addr);
 134                         if (m == ZMAGIC || m == NMAGIC || m == OMAGIC) {
 135                                 /* Move exec header out of the way */
 136                                 memcpy(addr - sizeof(struct exec), addr, n);
 137                                 addr -= sizeof(struct exec);
 138                         }
 139                 }
 140                 addr += n;
 141         }
 142
 143 }