5cf67adbc4
This allows boot1() to change the sector number (of the boot partition) that bootxx.S passes through to boot2(). This means that boot2() will find the correct partition when boot1() reads /boot from the 'a' partition instead of the mbr boot partition. This all happens when you update a system that used a small 'wd0h' partition to boot a raid1 set to the new bootcode. Deleting /boot from the 'wd0h' partition will make the new bootcode find /boot and the root filesystem inside the raid set.
149 lines
4.5 KiB
C
149 lines
4.5 KiB
C
/* $NetBSD: boot1.c,v 1.6 2004/06/27 15:37:11 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: boot1.c,v 1.6 2004/06/27 15:37:11 dsl Exp $");
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <biosdisk_ll.h>
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#include <sys/param.h>
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#include <sys/bootblock.h>
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#include <sys/disklabel.h>
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#include <dev/raidframe/raidframevar.h> /* For RF_PROTECTED_SECTORS */
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#define XSTR(x) #x
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#define STR(x) XSTR(x)
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static uint32_t bios_sector;
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static struct biosdisk_ll d;
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const char *boot1(uint32_t, uint32_t *);
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extern void putstr(const char *);
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extern struct disklabel ptn_disklabel;
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const char *
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boot1(uint32_t biosdev, uint32_t *sector)
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{
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struct stat sb;
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int fd;
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bios_sector = *sector;
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d.dev = biosdev;
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putstr("\r\nNetBSD/" MACHINE " " STR(FS) " Primary Bootstrap\r\n");
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if (set_geometry(&d, NULL))
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return "set_geometry\r\n";
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do {
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/*
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* We default to the filesystem at the start of the
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* MBR partition
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*/
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fd = open("boot", 0);
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if (fd != -1)
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break;
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/*
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* Maybe the filesystem is enclosed in a raid set.
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* add in size of raidframe header and try again.
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* (Maybe this should only be done if the filesystem
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* magic number is absent.)
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*/
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bios_sector += RF_PROTECTED_SECTORS;
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fd = open("boot", 0);
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if (fd != -1)
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break;
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/*
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* Nothing at the start of the MBR partition, fallback on
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* partition 'a' from the disklabel in this MBR partition.
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*/
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if (ptn_disklabel.d_magic != DISKMAGIC)
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break;
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if (ptn_disklabel.d_magic2 != DISKMAGIC)
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break;
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if (ptn_disklabel.d_partitions[0].p_fstype == FS_UNUSED)
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break;
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bios_sector = ptn_disklabel.d_partitions[0].p_offset;
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*sector = bios_sector;
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if (ptn_disklabel.d_partitions[0].p_fstype == FS_RAID)
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bios_sector += RF_PROTECTED_SECTORS;
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fd = open("boot", 0);
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} while (0);
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if (fd == -1 || fstat(fd, &sb) == -1)
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return "Can't open /boot.\r\n";
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#if 0
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if (sb.st_size > SECONDARY_MAX_LOAD)
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return "/boot too large.\r\n";
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#endif
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if (read(fd, (void *)SECONDARY_LOAD_ADDRESS, sb.st_size) != sb.st_size)
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return "/boot load failed.\r\n";
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if (*(uint32_t *)(SECONDARY_LOAD_ADDRESS + 4) != X86_BOOT_MAGIC_2)
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return "Invalid /boot file format.\r\n";
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/* We need to jump to the secondary bootstrap in realmode */
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return 0;
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}
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int
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blkdevstrategy(void *devdata, int flag, daddr_t dblk, size_t size, void *buf, size_t *rsize)
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{
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if (flag != F_READ)
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return EROFS;
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if (size & (BIOSDISK_SECSIZE - 1))
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return EINVAL;
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if (rsize)
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*rsize = size;
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if (size != 0 && readsects(&d, bios_sector + dblk,
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size / BIOSDISK_SECSIZE, buf, 1) != 0)
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return EIO;
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return 0;
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}
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