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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#ifndef DISK_H
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#define DISK_H
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#include "dev.h"
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/*
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* Structure returned from disk_probe and passed to other driver
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* functions.
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*/
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struct disk
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{
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struct dev dev; /* This must come first */
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int (*read)(struct disk *, sector_t sector);
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unsigned int drive;
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unsigned long hw_sector_size; /* The hardware sector size for dealing
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* with partition tables and the like.
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* Must be >= 512
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*/
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unsigned int sectors_per_read; /* The number of 512 byte sectors
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* returned by each read call.
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* All I/O must be aligned to this size.
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*/
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unsigned int bytes; /* The number of bytes in the read buffer. */
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sector_t sectors; /* The number of sectors on the drive. */
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sector_t sector; /* The first sector in the driver buffer */
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unsigned char *buffer; /* The data read from the drive */
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void *priv; /* driver can hang private data here */
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unsigned long disk_offset;
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int direction;
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};
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extern struct disk disk;
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extern int url_file(const char *name,
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int (*fnc)(unsigned char *, unsigned int, unsigned int, int));
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extern int disk_probe(struct dev *dev);
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extern int disk_load_configuration(struct dev *dev);
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extern int disk_load(struct dev *dev);
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extern void disk_disable(void);
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#ifndef DOWNLOAD_PROTO_DISK
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#define disk_disable() do { } while(0)
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#endif
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#define SECTOR_SIZE 512
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#define SECTOR_SHIFT 9
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/* Maximum block_size that may be set. */
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#define DISK_BUFFER_SIZE (18 * SECTOR_SIZE)
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#endif /* DISK_H */
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