/*
 * Copyright (c) 1992 The Regents of the University of California.
 * All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Lawrence Berkeley Laboratories.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)sbusreg.h	7.2 (Berkeley) 07/21/92
 *
 * from: $Header: sbusreg.h,v 1.5 92/06/17 06:59:44 torek Exp $ (LBL)
 */

/*
 * Sun-4c S-bus definitions.  (Should be made generic!)
 *
 * Sbus slot 0 is not a separate slot; it talks to the onboard I/O devices.
 * It is, however, addressed just like any `real' Sbus.
 *
 * Sbus device addresses are obtained from the FORTH PROMs.  They come
 * in `absolute' and `relative' address flavors, so we have to handle both.
 * Relative addresses do *not* include the slot number.
 */
#define	SBUS_BASE		0xf8000000
#define	SBUS_ADDR(slot, off)	(SBUS_BASE + ((slot) << 25) + (off))
#define	SBUS_ABS(a)		((unsigned)(a) >= SBUS_BASE)
#define	SBUS_ABS_TO_SLOT(a)	(((a) - SBUS_BASE) >> 25)
#define	SBUS_ABS_TO_OFFSET(a)	(((a) - SBUS_BASE) & 0x1ffffff)