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use new dr_interrupt pointer in struct driver for future interrupts support

/*
 * $Id: root.c,v 1.3 2007/10/29 21:10:02 init Exp $
 */
#include <sys/types.h>
#include <sys/device.h>
#include <libkern/printf.h>

/*
 * System root device.
 * All other will be created/destroyed dynamically with devconfig.
 */
struct device *rootdev;


int 	root_attach(struct device *, uint32_t, uint8_t);

/* bogus root_dd */
struct root_dd {
	uint32_t rd_bogus1;
	uint8_t  rd_bogus2;
};

struct driver root_dr = {
	/* sizeof(dd) */ sizeof(struct root_dd),
	/* attach */ root_attach,
	/* detach */ NULL,
	/* intr */ NULL
};


int
root_attach(struct device *self, uint32_t loc, uint8_t flags)
{
	/* root pseudo device */

	printf("(root) pseudo device\n");

	return(0);
}