#sccs	"@(#)uts/kern/sys:drv.h	1.4"
/*
 * drv.h - structures and defines for loadable driver option
 */
#ifndef drv_h
#define drv_h
#include "sys/types.h"
#include "sys/pte.h"
#include "sys/conf.h"

/*
 * structure for allocation 
 */
struct drvalloc {
	uint	d_size;		/* desired size/returned alloced size */
	char	*d_addr;	/* virtual address */
	short	d_bmaj;		/* blk major/returned alloced blk major */
	short	d_cmaj;		/* char major/returned alloced char major */
	short	d_linesw;
	ushort	d_flags;	/* status flags */
	ushort	d_drvid;	/* driver id/returned driver id */
};

/* allocation options */
#define	DRVALLOC	0x001	/* allocate virtual space */
#define DRVMALLOC	0x002	/* allocate major number and virtual space */
#define DRVSTAT		0x004	/* return info on drv_id */
#define DRVUNALLOC	0x008	/* un-allocate space & major # */

/*
 * structure for driver binding
 */
struct drvbind {
	uint	d_size;		/* size to load */
	char	*d_addr;	/* address in process to load */
	ushort	d_drvid;	/* driver id */
	struct bdevsw *d_bsw;	/* ptr to blk entry points */
	struct cdevsw *d_csw;	/* ptr to char entry points */
	struct linesw *d_lsw;
	int (*d_init)();	/* ptr to device init routine */
	int (*d_release)();	/* ptr to device release routine */
};

/* binding options */
#define DRVBIND		0x100	/* load in driver */
#define DRVUNBIND	0x200	/* unload driver */

/*
 * internal representation of loadable driver
 * drv_id is index into table
 */
#define DMMXSZ	32	/* max # pages for a driver */
struct drv_tbl {
	char	*d_addr;	/* virtual address */
	ushort	d_size;		/* alloced size in pages */
	short	d_bmaj;		/* blk major */
	short	d_cmaj;		/* char major */
	short	d_linesw;
	ushort	d_flags;	/* status flags */
	int (*d_release)();	/* ptr to device release routine */
	struct mpte *d_mpte;	/* page table entries for driver (in kv_mpte) */
};

/* values for status flags */
#define DBOUND		0x1	/* driver is loaded & bound */
#define DALLOC		0x2	/* slot is allocated */
	
struct drv_int {
	struct drv_int *next;	/* link */
	int (*routine)();	/* interrupt routine */
};
#endif