Initial revision

src/include/disk.h

@@ -0,0 +1,53 @@
+#ifndef DISK_H
+#define DISK_H
+
+#include "dev.h"
+
+/*
+ *	Structure returned from disk_probe and passed to other driver
+ *	functions.
+ */
+struct disk
+{
+	struct dev    dev;  /* This must come first */
+	int	      (*read)(struct disk *, sector_t sector);
+	unsigned int  drive;
+	unsigned long hw_sector_size;   /* The hardware sector size for dealing
+				         * with partition tables and the like.
+				         * Must be >= 512
+				         */
+	unsigned int  sectors_per_read; /* The number of 512 byte sectors
+					 * returned by each read call. 
+				         * All I/O must be aligned to this size.
+				         */
+	unsigned int  bytes;	        /* The number of bytes in the read buffer. */
+	sector_t      sectors;	        /* The number of sectors on the drive.  */
+	sector_t      sector;	        /* The first sector in the driver buffer  */
+	unsigned char *buffer;	        /* The data read from the drive */
+	void	      *priv;	        /* driver can hang private data here */
+
+	unsigned long disk_offset;
+	int           direction;
+};
+
+extern struct disk disk;
+extern int url_file(const char *name,
+	int (*fnc)(unsigned char *, unsigned int, unsigned int, int));
+
+extern int disk_probe(struct dev *dev);
+extern int disk_load_configuration(struct dev *dev);
+extern int disk_load(struct dev *dev);
+extern void disk_disable(void);
+
+
+#ifndef DOWNLOAD_PROTO_DISK
+#define disk_disable()	do { } while(0)
+#endif
+
+#define SECTOR_SIZE 512
+#define SECTOR_SHIFT 9
+
+/* Maximum block_size that may be set. */
+#define DISK_BUFFER_SIZE (18 * SECTOR_SIZE)
+
+#endif /* DISK_H */