116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
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#ifndef UTIL_LINUX_PT_SGI_H
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#define UTIL_LINUX_PT_SGI_H
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#include <stdint.h>
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#define SGI_LABEL_MAGIC 0x0be5a941
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#define SGI_MAXPARTITIONS 16
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#define SGI_MAXVOLUMES 15
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/* partition types */
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enum {
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SGI_TYPE_VOLHDR = 0x00,
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SGI_TYPE_TRKREPL = 0x01,
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SGI_TYPE_SECREPL = 0x02,
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SGI_TYPE_SWAP = 0x03,
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SGI_TYPE_BSD = 0x04,
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SGI_TYPE_SYSV = 0x05,
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SGI_TYPE_ENTIRE_DISK = 0x06,
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SGI_TYPE_EFS = 0x07,
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SGI_TYPE_LVOL = 0x08,
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SGI_TYPE_RLVOL = 0x09,
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SGI_TYPE_XFS = 0x0a,
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SGI_TYPE_XFSLOG = 0x0b,
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SGI_TYPE_XLV = 0x0c,
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SGI_TYPE_XVM = 0x0d
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};
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struct sgi_device_parameter {
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unsigned char skew;
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unsigned char gap1;
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unsigned char gap2;
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unsigned char sparecyl;
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uint16_t pcylcount;
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uint16_t head_vol0;
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uint16_t ntrks; /* tracks in cyl 0 or vol 0 */
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unsigned char cmd_tag_queue_depth;
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unsigned char unused0;
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uint16_t unused1;
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uint16_t nsect; /* sectors/tracks in cyl 0 or vol 0 */
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uint16_t bytes;
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uint16_t ilfact;
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uint32_t flags; /* SGI_DEVPARAM_* controller flags */
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uint32_t datarate;
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uint32_t retries_on_error;
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uint32_t ms_per_word;
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uint16_t xylogics_gap1;
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uint16_t xylogics_syncdelay;
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uint16_t xylogics_readdelay;
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uint16_t xylogics_gap2;
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uint16_t xylogics_readgate;
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uint16_t xylogics_writecont;
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} __attribute__((packed));
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enum {
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SGI_DEVPARAM_SECTOR_SLIP = 0x01,
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SGI_DEVPARAM_SECTOR_FWD = 0x02,
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SGI_DEVPARAM_TRACK_FWD = 0x04,
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SGI_DEVPARAM_TRACK_MULTIVOL = 0x08,
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SGI_DEVPARAM_IGNORE_ERRORS = 0x10,
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SGI_DEVPARAM_RESEEK = 0x20,
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SGI_DEVPARAM_CMDTAGQ_ENABLE = 0x40
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};
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struct sgi_disklabel {
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uint32_t magic; /* magic number */
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uint16_t root_part_num; /* # root partition */
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uint16_t swap_part_num; /* # swap partition */
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unsigned char boot_file[16]; /* name of boot file */
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struct sgi_device_parameter devparam; /* not used now */
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struct sgi_volume {
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unsigned char name[8]; /* name of volume */
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uint32_t block_num; /* logical block number */
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uint32_t num_bytes; /* how big, in bytes */
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} __attribute__((packed)) volume[SGI_MAXVOLUMES];
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struct sgi_partition {
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uint32_t num_blocks; /* size in logical blocks */
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uint32_t first_block; /* first logical block */
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uint32_t type; /* type of this partition */
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} __attribute__((packed)) partitions[SGI_MAXPARTITIONS];
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/* checksum is the 32bit 2's complement sum of the disklabel */
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uint32_t csum; /* disk label checksum */
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uint32_t padding; /* padding */
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} __attribute__((packed));
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static inline uint32_t sgi_pt_checksum(struct sgi_disklabel *label)
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{
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int count;
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uint32_t sum = 0;
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unsigned char *ptr = (unsigned char *) label;
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count = sizeof(*label) / sizeof(uint32_t);
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ptr += sizeof(uint32_t) * (count - 1);
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while (count--) {
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uint32_t val;
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memcpy(&val, ptr, sizeof(uint32_t));
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sum -= be32_to_cpu(val);
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ptr -= sizeof(uint32_t);
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}
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return sum;
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}
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#endif /* UTIL_LINUX_PT_SGI_H */
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