3BSD/usr/include/saio.h

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/*
 * header file for standalone package
 */

/*
 * io block: includes an
 * inode, cells for the use of seek, etc,
 * and a buffer.
 */
struct	iob {
	char	i_flgs;
	struct	inode i_ino;
	int	i_unit;
	daddr_t	i_boff;
	daddr_t	i_cyloff;
	off_t	i_offset;
	daddr_t	i_bn;
	char	*i_ma;
	int	i_cc;
	char	i_buf[BSIZE];
};

#define F_READ	01
#define F_WRITE	02
#define F_ALLOC	04
#define F_FILE	010

/*
 * dev switch
 */
struct devsw {
	char	*dv_name;
	int	(*dv_strategy)();
	int	(*dv_open)();
	int	(*dv_close)();
};

struct devsw devsw[];

/*
 * request codes. Must be the same a F_XXX above
 */
#define	READ	1
#define	WRITE	2

#define	NBUFS	4

char	b[NBUFS][BSIZE];
daddr_t	blknos[NBUFS];

#define NFILES	4
struct	iob iob[NFILES];

#define	PHYSUBA0	0x20006000
#define	PHYSMBA0	0x20010000
#define	PHYSMBA1	0x20012000
#define	PHYSUMEM	0x2013e000