/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/*
* Program boot-mips.c - Handle big-endian boot extensions to iso9660.
*
* Written by Steve McIntyre <steve@einval.com> June 2004
*
* Heavily inspired by / borrowed from genisovh:
*
* Copyright: (C) 2002 by Florian Lohoff <flo@rfc822.org>
* (C) 2004 by Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, Version 2, as published by the
* Free Software Foundation.
*
* Format for volume header information
*
* The volume header is a block located at the beginning of all disk
* media (sector 0). It contains information pertaining to physical
* device parameters and logical partition information.
*
* The volume header is manipulated by disk formatters/verifiers,
* partition builders (e.g. fx, dvhtool, and mkfs), and disk drivers.
*
* Previous versions of IRIX wrote a copy of the volume header is
* located at sector 0 of each track of cylinder 0. These copies were
* never used, and reduced the capacity of the volume header to hold large
* files, so this practice was discontinued.
* The volume header is constrained to be less than or equal to 512
* bytes long. A particular copy is assumed valid if no drive errors
* are detected, the magic number is correct, and the 32 bit 2's complement
* of the volume header is correct. The checksum is calculated by initially
* zeroing vh_csum, summing the entire structure and then storing the
* 2's complement of the sum. Thus a checksum to verify the volume header
* should be 0.
*
* The error summary table, bad sector replacement table, and boot blocks are
* located by searching the volume directory within the volume header.
*
* Tables are sized simply by the integral number of table records that
* will fit in the space indicated by the directory entry.
*
* The amount of space allocated to the volume header, replacement blocks,
* and other tables is user defined when the device is formatted.
*/
#include <inttypes.h>
#ifndef MIN
#define MIN(a,b) ( (a<b) ? a : b )
#endif
/*
* device parameters are in the volume header to determine mapping
* from logical block numbers to physical device addresses
*
* Linux doesn't care ...
*/
struct device_parameters {
uint8_t dp_skew; /* spiral addressing skew */
uint8_t dp_gap1; /* words of 0 before header */
uint8_t dp_gap2; /* words of 0 between hdr and data */
uint8_t dp_spares_cyl; /* This is for drives (such as SCSI
that support zone oriented sparing, where the zone is larger
than one track. It gets subracteded from the cylinder size
( dp_trks0 * dp_sec) when doing partition size calculations */
uint16_t dp_cyls; /* number of usable cylinders (i.e.,
doesn't include cylinders reserved by the drive for badblocks,
etc.). For drives with variable geometry, this number may be
decreased so that:
dp_cyls * ((dp_heads * dp_trks0) - dp_spares_cyl) <= actualcapacity
This happens on SCSI drives such as the Wren IV and Toshiba 156
Also see dp_cylshi below */
uint16_t dp_shd0; /* starting head vol 0 */
uint16_t dp_trks0; /* number of tracks / cylinder vol 0*/
uint8_t dp_ctq_depth; /* Depth of CTQ queue */
uint8_t dp_cylshi; /* high byte of 24 bits of cylinder count */
uint16_t dp_unused; /* not used */
uint16_t dp_secs; /* number of sectors/track */
uint16_t dp_secbytes; /* length of sector in bytes */
uint16_t dp_interleave; /* sector interleave */
int32_t dp_flags; /* controller characteristics */
int32_t dp_datarate; /* bytes/sec for kernel stats */
int32_t dp_nretries; /* max num retries on data error */
int32_t dp_mspw; /* ms per word to xfer, for iostat */
uint16_t dp_xgap1; /* Gap 1 for xylogics controllers */
uint16_t dp_xsync; /* sync delay for xylogics controllers */
uint16_t dp_xrdly; /* read delay for xylogics controllers */
uint16_t dp_xgap2; /* gap 2 for xylogics controllers */
uint16_t dp_xrgate; /* read gate for xylogics controllers */
uint16_t dp_xwcont; /* write continuation for xylogics */
};
/*
* Device characterization flags
* (dp_flags)
*/
#define DP_SECTSLIP 0x00000001 /* sector slip to spare sector */
#define DP_SECTFWD 0x00000002 /* forward to replacement sector */
#define DP_TRKFWD 0x00000004 /* forward to replacement track */
#define DP_MULTIVOL 0x00000008 /* multiple volumes per spindle */
#define DP_IGNOREERRORS 0x00000010 /* transfer data regardless of errors */
#define DP_RESEEK 0x00000020 /* recalibrate as last resort */
#define DP_CTQ_EN 0x00000040 /* enable command tag queueing */
/*
* Boot blocks, bad sector tables, and the error summary table, are located
* via the volume_directory.
*/
#define VDNAMESIZE 8
struct volume_directory {
int8_t vd_name[VDNAMESIZE]; /* name */
int32_t vd_lbn; /* logical block number */
int32_t vd_nbytes; /* file length in bytes */
};
/*
* partition table describes logical device partitions
* (device drivers examine this to determine mapping from logical units
* to cylinder groups, device formatters/verifiers examine this to determine
* location of replacement tracks/sectors, etc)
*
* NOTE: pt_firstlbn SHOULD BE CYLINDER ALIGNED
*/
struct partition_table { /* one per logical partition */
int32_t pt_nblks; /* # of logical blks in partition */
int32_t pt_firstlbn; /* first lbn of partition */
int32_t pt_type; /* use of partition */
};
#define PTYPE_VOLHDR 0 /* partition is volume header */
#define PTYPE_TRKREPL 1 /* partition is used for repl trks */
#define PTYPE_SECREPL 2 /* partition is used for repl secs */
#define PTYPE_RAW 3 /* partition is used for data */
#define PTYPE_BSD42 4 /* partition is 4.2BSD file system */
#define PTYPE_BSD 4 /* partition is 4.2BSD file system */
#define PTYPE_SYSV 5 /* partition is SysV file system */
#define PTYPE_VOLUME 6 /* partition is entire volume */
#define PTYPE_EFS 7 /* partition is sgi EFS */
#define PTYPE_LVOL 8 /* partition is part of a logical vol */
#define PTYPE_RLVOL 9 /* part of a "raw" logical vol */
#define PTYPE_XFS 10 /* partition is sgi XFS */
#define PTYPE_XFSLOG 11 /* partition is sgi XFS log */
#define PTYPE_XLV 12 /* partition is part of an XLV vol */
#define PTYPE_XVM 13 /* partition is sgi XVM */
#define PTYPE_LSWAP 0x82 /* partition is Linux swap */
#define PTYPE_LINUX 0x83 /* partition is Linux native */
#define NPTYPES 16
#define VHMAGIC 0xbe5a941 /* randomly chosen value */
#define NPARTAB 16 /* 16 unix partitions */
#define NVDIR 15 /* max of 15 directory entries */
#define BFNAMESIZE 16 /* max 16 chars in boot file name */
/* Partition types for ARCS */
#define NOT_USED 0 /* Not used */
#define FAT_SHORT 1 /* FAT filesystem, 12-bit FAT entries */
#define FAT_LONG 4 /* FAT filesystem, 16-bit FAT entries */
#define EXTENDED 5 /* extended partition */
#define HUGE 6 /* huge partition- MS/DOS 4.0 and later */
/* Active flags for ARCS */
#define BOOTABLE 0x00;
#define NOT_BOOTABLE 0x80;
struct volume_header {
int32_t vh_magic; /* identifies volume header */
int16_t vh_rootpt; /* root partition number */
int16_t vh_swappt; /* swap partition number */
int8_t vh_bootfile[BFNAMESIZE]; /* name of file to boot */
struct device_parameters vh_dp; /* device parameters */
struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */
struct partition_table vh_pt[NPARTAB]; /* device partition layout */
int32_t vh_csum; /* volume header checksum */
int32_t vh_fill; /* fill out to 512 bytes */
char pad[1536]; /* pad out to 2048 */
};
#include <mconfig.h>
#include "genisoimage.h"
#include <fctldefs.h>
#include <utypes.h>
#include <intcvt.h>
#include "match.h"
#include "diskmbr.h"
#include "bootinfo.h"
#include <schily.h>
#include "endianconv.h"
int add_boot_mips_filename(char *filename);
static int boot_mips_write(FILE *outfile);
#define MAX_NAMES 15
static char *boot_mips_filename[MAX_NAMES] =
{
NULL, NULL, NULL,
NULL, NULL, NULL,
NULL, NULL, NULL,
NULL, NULL, NULL,
NULL, NULL, NULL
};
static int boot_mips_num_files = 0;
#define SECTORS_PER_TRACK 32
#define BYTES_PER_SECTOR 512
int add_boot_mips_filename(char *filename)
{
if (boot_mips_num_files < MAX_NAMES)
{
boot_mips_filename[boot_mips_num_files] = filename;
boot_mips_num_files++;
}
else
{
#ifdef USE_LIBSCHILY
comerrno(EX_BAD, "Too many MIPS boot files!\n");
#else
fprintf(stderr, "Too many MIPS boot files!\n");
exit(1);
#endif
}
return 0;
}
static void vh_calc_checksum(struct volume_header *vh)
{
uint32_t newsum = 0;
unsigned char *buffer = (unsigned char *)vh;
unsigned int i;
vh->vh_csum = 0;
for(i = 0; i < sizeof(struct volume_header); i += 4)
newsum -= read_be32(&buffer[i]);
write_be32(newsum, (unsigned char *)&vh->vh_csum);
}
static char *file_base_name(char *path)
{
char *endptr = path;
char *ptr = path;
while (*ptr != '\0')
{
if ('/' == *ptr)
endptr = ++ptr;
else
++ptr;
}
return endptr;
}
static int boot_mips_write(FILE *outfile)
{
struct directory_entry *boot_file; /* Boot file we need to search for */
unsigned long length = 0;
unsigned long extent = 0;
int i;
struct volume_header vh;
unsigned long long iso_size = 0;
char *filename = NULL;
memset(&vh, 0, sizeof(vh));
iso_size = last_extent * 2048;
write_be32(VHMAGIC, (unsigned char *)&vh.vh_magic);
/* Values from an IRIX cd */
write_be16(BYTES_PER_SECTOR, (unsigned char *)&vh.vh_dp.dp_secbytes);
write_be16(SECTORS_PER_TRACK, (unsigned char *)&vh.vh_dp.dp_secs);
write_be32(DP_RESEEK|DP_IGNOREERRORS|DP_TRKFWD, (unsigned char *)&vh.vh_dp.dp_flags);
write_be16(1, (unsigned char *)&vh.vh_dp.dp_trks0);
write_be16((iso_size + BYTES_PER_SECTOR - 1) / (SECTORS_PER_TRACK * BYTES_PER_SECTOR),
(unsigned char *)&vh.vh_dp.dp_cyls);
for(i = 0; i < boot_mips_num_files; i++)
{
boot_file = search_tree_file(root, boot_mips_filename[i]);
if (!boot_file) {
#ifdef USE_LIBSCHILY
comerrno(EX_BAD, "Uh oh, I cant find the MIPS boot file '%s'!\n",
boot_mips_filename[i]);
#else
fprintf(stderr, "Uh oh, I cant find the MIPS boot file '%s'!\n",
boot_mips_filename[i]);
exit(1);
#endif
}
extent = get_733(boot_file->isorec.extent) * 4;
length = ((get_733(boot_file->isorec.size) + 2047) / 2048) * 2048;
filename = file_base_name(boot_mips_filename[i]);
strncpy(vh.vh_vd[i].vd_name, filename, MIN(VDNAMESIZE, strlen(filename)));
write_be32(extent, (unsigned char *)&vh.vh_vd[i].vd_lbn);
write_be32(length, (unsigned char *)&vh.vh_vd[i].vd_nbytes);
fprintf(stderr, "Found mips boot image %s, using extent %lu (0x%lX), #blocks %lu (0x%lX)\n",
filename, extent, extent, length, length);
}
/* Create volume partition on whole cd iso */
write_be32((iso_size + (BYTES_PER_SECTOR - 1))/ BYTES_PER_SECTOR, (unsigned char *)&vh.vh_pt[10].pt_nblks);
write_be32(0, (unsigned char *)&vh.vh_pt[10].pt_firstlbn);
write_be32(PTYPE_VOLUME, (unsigned char *)&vh.vh_pt[10].pt_type);
/* Create volume header partition, also on WHOLE cd iso */
write_be32((iso_size + (BYTES_PER_SECTOR - 1))/ BYTES_PER_SECTOR, (unsigned char *)&vh.vh_pt[8].pt_nblks);
write_be32(0, (unsigned char *)&vh.vh_pt[8].pt_firstlbn);
write_be32(PTYPE_VOLHDR, (unsigned char *)&vh.vh_pt[8].pt_type);
/* Create checksum */
vh_calc_checksum(&vh);
jtwrite(&vh, sizeof(vh), 1, 0, FALSE);
xfwrite(&vh, sizeof(vh), 1, outfile, 0, FALSE);
last_extent_written++;
return 0;
}
struct output_fragment mipsboot_desc = {NULL, oneblock_size, NULL, boot_mips_write, "MIPS boot block"};
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