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| 1 | /*
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| 2 | minix/swap.h
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| 3 |
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| 4 | Defines the super block of swap partitions and some useful constants.
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| 5 |
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| 6 | Created: Aug 2, 1992 by Philip Homburg
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| 7 | */
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| 8 |
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| 9 | #ifndef _MINIX__SWAP_H
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| 10 | #define _MINIX__SWAP_H
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| 11 |
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| 12 | /* Two possible layouts for a partition with swapspace:
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| 13 | *
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| 14 | * Sector Swap partition FS+swap partition
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| 15 | *
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| 16 | * 0 - 1 bootblock bootblock
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| 17 | * 2 swap header FS header
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| 18 | * 3 blank swap header
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| 19 | * 4 - m swapspace file system
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| 20 | * m+1 - n - swapspace
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| 21 | */
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| 22 |
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| 23 | #define SWAP_MAGIC0 0x9D
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| 24 | #define SWAP_MAGIC1 0xC3
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| 25 | #define SWAP_MAGIC2 0x01
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| 26 | #define SWAP_MAGIC3 0x82
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| 27 |
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| 28 | typedef struct swap_hdr
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| 29 | {
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| 30 | u8_t sh_magic[4];
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| 31 | u8_t sh_version;
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| 32 | u8_t sh_dummy[3];
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| 33 | u32_t sh_offset;
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| 34 | u32_t sh_swapsize;
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| 35 | i32_t sh_priority;
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| 36 | } swap_hdr_t;
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| 37 |
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| 38 | #define SWAP_BOOTOFF 1024
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| 39 | #define SWAP_OFFSET 2048
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| 40 | #define OPTSWAP_BOOTOFF (1024+512)
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| 41 | #define SH_VERSION 1
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| 42 | #define SH_PRIORITY 0
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| 43 |
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| 44 | #endif /* _MINIX__SWAP_H */
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| 45 |
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| 46 | /*
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| 47 | * $PchId: swap.h,v 1.6 1996/04/10 20:25:48 philip Exp $
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| 48 | */
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