/*
* Copyright (c) 2000 Wayne Knowles. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define MIPS_PARTITIONS 16 /* Number or partitions for Mips */
#define MIPS_NVOLDIR 15 /* Number of volume directory files */
#define MIPS_VDIRSZ 8 /* File name size in volume directory */
#define MIPS_BFSIZE 16 /* Boot filename size */
#define MIPS_VHSECTOR 0 /* Sector number for MIPS volume header */
/*
* Devices parameters that RISC/os uses for mapping logical block numbers
* to physical device addresses.
*/
struct mips_devparams {
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_spare0; /* spare space */
uint16_t dp_cyls; /* number of cylinders */
uint16_t dp_shd0; /* starting head vol 0 */
uint16_t dp_trks0; /* number of tracks vol 0 */
uint16_t dp_shd1; /* starting head vol 1 */
uint16_t dp_trks1; /* number of tracks vol 1 */
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_spare1; /* spare entries */
int32_t dp_spare2;
int32_t dp_spare3;
int32_t dp_spare4;
} __attribute__((__packed__));
/*
* Volume directory is used as a shortcut to find bootstraps etc
*/
struct mips_voldir { /* Disk volume directory */
char vd_name[MIPS_VDIRSZ];
int32_t vd_lba;
int32_t vd_len;
};
struct mips_partitions {
int32_t pt_size; /* # of logical blocks in partition */
int32_t pt_offset; /* first logical block of partition */
int32_t pt_fstype;
};
/*
* Mips RISC/os compatible volume header and partition table
*
* 1 sector (512 bytes) in size, and normally copied to the first sector
* and cylinder of every track on a disk.
*/
struct mips_volheader {
uint32_t vh_magic;
#define MIPS_VHMAGIC 0xbe5a941
int16_t vh_root; /* Root partition number */
int16_t vh_swap; /* Swap partition number */
char bootfile[MIPS_BFSIZE]; /* default file to boot */
struct mips_devparams vh_dp; /* disk device parameters */
struct mips_voldir vh_voldir[MIPS_NVOLDIR];
struct mips_partitions vh_part[MIPS_PARTITIONS];
int32_t vh_cksum;
int32_t vh_pad;
} __attribute__((__packed__));
