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/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*/
#ifndef UTIL_LINUX_PT_SGI_H
#define UTIL_LINUX_PT_SGI_H
#include <stdint.h>
#define SGI_LABEL_MAGIC 0x0be5a941
#define SGI_MAXPARTITIONS 16
#define SGI_MAXVOLUMES 15
/* partition types */
enum {
SGI_TYPE_VOLHDR = 0x00,
SGI_TYPE_TRKREPL = 0x01,
SGI_TYPE_SECREPL = 0x02,
SGI_TYPE_SWAP = 0x03,
SGI_TYPE_BSD = 0x04,
SGI_TYPE_SYSV = 0x05,
SGI_TYPE_ENTIRE_DISK = 0x06,
SGI_TYPE_EFS = 0x07,
SGI_TYPE_LVOL = 0x08,
SGI_TYPE_RLVOL = 0x09,
SGI_TYPE_XFS = 0x0a,
SGI_TYPE_XFSLOG = 0x0b,
SGI_TYPE_XLV = 0x0c,
SGI_TYPE_XVM = 0x0d
};
struct sgi_device_parameter {
unsigned char skew;
unsigned char gap1;
unsigned char gap2;
unsigned char sparecyl;
uint16_t pcylcount;
uint16_t head_vol0;
uint16_t ntrks; /* tracks in cyl 0 or vol 0 */
unsigned char cmd_tag_queue_depth;
unsigned char unused0;
uint16_t unused1;
uint16_t nsect; /* sectors/tracks in cyl 0 or vol 0 */
uint16_t bytes;
uint16_t ilfact;
uint32_t flags; /* SGI_DEVPARAM_* controller flags */
uint32_t datarate;
uint32_t retries_on_error;
uint32_t ms_per_word;
uint16_t xylogics_gap1;
uint16_t xylogics_syncdelay;
uint16_t xylogics_readdelay;
uint16_t xylogics_gap2;
uint16_t xylogics_readgate;
uint16_t xylogics_writecont;
} __attribute__((packed));
enum {
SGI_DEVPARAM_SECTOR_SLIP = 0x01,
SGI_DEVPARAM_SECTOR_FWD = 0x02,
SGI_DEVPARAM_TRACK_FWD = 0x04,
SGI_DEVPARAM_TRACK_MULTIVOL = 0x08,
SGI_DEVPARAM_IGNORE_ERRORS = 0x10,
SGI_DEVPARAM_RESEEK = 0x20,
SGI_DEVPARAM_CMDTAGQ_ENABLE = 0x40
};
struct sgi_disklabel {
uint32_t magic; /* magic number */
uint16_t root_part_num; /* # root partition */
uint16_t swap_part_num; /* # swap partition */
unsigned char boot_file[16]; /* name of boot file */
struct sgi_device_parameter devparam; /* not used now */
struct sgi_volume {
unsigned char name[8]; /* name of volume */
uint32_t block_num; /* logical block number */
uint32_t num_bytes; /* how big, in bytes */
} __attribute__((packed)) volume[SGI_MAXVOLUMES];
struct sgi_partition {
uint32_t num_blocks; /* size in logical blocks */
uint32_t first_block; /* first logical block */
uint32_t type; /* type of this partition */
} __attribute__((packed)) partitions[SGI_MAXPARTITIONS];
/* checksum is the 32bit 2's complement sum of the disklabel */
uint32_t csum; /* disk label checksum */
uint32_t padding; /* padding */
} __attribute__((packed));
static inline uint32_t sgi_pt_checksum(struct sgi_disklabel *label)
{
int count;
uint32_t sum = 0;
unsigned char *ptr = (unsigned char *) label;
count = sizeof(*label) / sizeof(uint32_t);
ptr += sizeof(uint32_t) * (count - 1);
while (count--) {
uint32_t val;
memcpy(&val, ptr, sizeof(uint32_t));
sum -= be32_to_cpu(val);
ptr -= sizeof(uint32_t);
}
return sum;
}
#endif /* UTIL_LINUX_PT_SGI_H */
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