1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)sbusreg.h 8.1 (Berkeley) 06/11/93 17 * 18 * from: $Header: sbusreg.h,v 1.6 92/11/26 02:28:14 torek Exp $ (LBL) 19 */ 20 21 /* 22 * Sun-4c S-bus definitions. (Should be made generic!) 23 * 24 * Sbus slot 0 is not a separate slot; it talks to the onboard I/O devices. 25 * It is, however, addressed just like any `real' Sbus. 26 * 27 * Sbus device addresses are obtained from the FORTH PROMs. They come 28 * in `absolute' and `relative' address flavors, so we have to handle both. 29 * Relative addresses do *not* include the slot number. 30 */ 31 #define SBUS_BASE 0xf8000000 32 #define SBUS_ADDR(slot, off) (SBUS_BASE + ((slot) << 25) + (off)) 33 #define SBUS_ABS(a) ((unsigned)(a) >= SBUS_BASE) 34 #define SBUS_ABS_TO_SLOT(a) (((a) - SBUS_BASE) >> 25) 35 #define SBUS_ABS_TO_OFFSET(a) (((a) - SBUS_BASE) & 0x1ffffff) 36