| 1 | #ifndef DISK_H
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| 2 | #define DISK_H
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| 3 |
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| 4 | #include "dev.h"
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| 5 |
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| 6 | /*
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| 7 | * Structure returned from disk_probe and passed to other driver
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| 8 | * functions.
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| 9 | */
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| 10 | struct disk
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| 11 | {
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| 12 | struct dev dev; /* This must come first */
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| 13 | int (*read)(struct disk *, sector_t sector);
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| 14 | unsigned int drive;
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| 15 | unsigned long hw_sector_size; /* The hardware sector size for dealing
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| 16 | * with partition tables and the like.
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| 17 | * Must be >= 512
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| 18 | */
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| 19 | unsigned int sectors_per_read; /* The number of 512 byte sectors
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| 20 | * returned by each read call.
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| 21 | * All I/O must be aligned to this size.
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| 22 | */
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| 23 | unsigned int bytes; /* The number of bytes in the read buffer. */
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| 24 | sector_t sectors; /* The number of sectors on the drive. */
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| 25 | sector_t sector; /* The first sector in the driver buffer */
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| 26 | unsigned char *buffer; /* The data read from the drive */
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| 27 | void *priv; /* driver can hang private data here */
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| 28 |
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| 29 | unsigned long disk_offset;
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| 30 | int direction;
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| 31 | };
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| 32 |
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| 33 | extern struct disk disk;
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| 34 | extern int url_file(const char *name,
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| 35 | int (*fnc)(unsigned char *, unsigned int, unsigned int, int));
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| 36 |
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| 37 | extern int disk_probe(struct dev *dev);
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| 38 | extern int disk_load_configuration(struct dev *dev);
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| 39 | extern int disk_load(struct dev *dev);
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| 40 | extern void disk_disable(void);
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| 41 |
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| 42 |
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| 43 | #ifndef DOWNLOAD_PROTO_DISK
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| 44 | #define disk_disable() do { } while(0)
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| 45 | #endif
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| 46 |
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| 47 | #define SECTOR_SIZE 512
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| 48 | #define SECTOR_SHIFT 9
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| 49 |
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| 50 | /* Maximum block_size that may be set. */
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| 51 | #define DISK_BUFFER_SIZE (18 * SECTOR_SIZE)
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| 52 |
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| 53 | #endif /* DISK_H */
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