sys/arch/landisk/stand/bootxx/boot1.c

   1 /*      $NetBSD: boot1.c,v 1.1 2006/09/01 21:26:19 uwe Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by David Laight.
   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/cdefs.h>
  33 __RCSID("$NetBSD: boot1.c,v 1.1 2006/09/01 21:26:19 uwe Exp $");
  34
  35 #include <lib/libsa/stand.h>
  36 #include <lib/libkern/libkern.h>
  37
  38 #include <sys/param.h>
  39 #include <sys/bootblock.h>
  40 #include <sys/disklabel.h>
  41 #include <dev/raidframe/raidframevar.h> /* For RF_PROTECTED_SECTORS */
  42
  43 #include "biosdisk_ll.h"
  44
  45 #define XSTR(x) #x
  46 #define STR(x)  XSTR(x)
  47
  48 static uint32_t bios_sector;
  49
  50 const char *boot1(uint32_t *);
  51 void putstr(const char *str);
  52 int raise(int sig);
  53
  54 extern struct disklabel ptn_disklabel;
  55
  56 const char *
  57 boot1(uint32_t *sector)
  58 {
  59         struct stat sb;
  60         int fd;
  61
  62         bios_sector = *sector;
  63
  64         putstr("\r\nNetBSD/" MACHINE " " STR(FS) " Primary Bootstrap\r\n");
  65
  66         do {
  67                 /*
  68                  * We default to the filesystem at the start of the
  69                  * MBR partition
  70                  */
  71                 fd = open("boot", 0);
  72                 if (fd != -1)
  73                         break;
  74
  75                 /*
  76                  * Maybe the filesystem is enclosed in a raid set.
  77                  * add in size of raidframe header and try again.
  78                  * (Maybe this should only be done if the filesystem
  79                  * magic number is absent.)
  80                  */
  81                 bios_sector += RF_PROTECTED_SECTORS;
  82                 fd = open("boot", 0);
  83                 if (fd != -1)
  84                         break;
  85
  86                 /*
  87                  * Nothing at the start of the MBR partition, fallback on
  88                  * partition 'a' from the disklabel in this MBR partition.
  89                  */
  90                 if (ptn_disklabel.d_magic != DISKMAGIC)
  91                         break;
  92                 if (ptn_disklabel.d_magic2 != DISKMAGIC)
  93                         break;
  94                 if (ptn_disklabel.d_partitions[0].p_fstype == FS_UNUSED)
  95                         break;
  96
  97                 bios_sector = ptn_disklabel.d_partitions[0].p_offset;
  98                 *sector = bios_sector;
  99                 if (ptn_disklabel.d_partitions[0].p_fstype == FS_RAID)
 100                         bios_sector += RF_PROTECTED_SECTORS;
 101                 fd = open("boot", 0);
 102         } while (0);
 103
 104         if (fd == -1 || fstat(fd, &sb) == -1)
 105                 return "Can't open /boot.\r\n";
 106
 107 #if 0
 108         if (sb.st_size > SECONDARY_MAX_LOAD)
 109                 return "/boot too large.\r\n";
 110 #endif
 111
 112         if (read(fd, (void *)SECONDARY_LOAD_ADDRESS, sb.st_size) != sb.st_size)
 113                 return "/boot load failed.\r\n";
 114
 115         if (*(uint32_t *)(SECONDARY_LOAD_ADDRESS + 4) != LANDISK_BOOT_MAGIC_2)
 116                 return "Invalid /boot file format.\r\n";
 117
 118         return 0;
 119 }
 120
 121 int
 122 blkdevstrategy(void *devdata, int flag, daddr_t dblk, size_t size, void *buf, size_t *rsize)
 123 {
 124
 125         if (flag != F_READ)
 126                 return EROFS;
 127
 128         if (size & (BIOSDISK_SECSIZE - 1))
 129                 return EINVAL;
 130
 131         if (rsize)
 132                 *rsize = size;
 133
 134         if (size != 0 && readsects(0x40, bios_sector + dblk, buf,
 135                                    size / BIOSDISK_SECSIZE) != 0)
 136                 return EIO;
 137
 138         return 0;
 139 }
 140
 141 /*ARGUSED*/
 142 int
 143 raise(int sig)
 144 {
 145
 146         return 0;
 147 }