1 /* $NetBSD: bus_machdep.h,v 1.3 2008/04/28 20:23:21 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _HPCMIPS_BUS_MACHDEP_H_ 34 #define _HPCMIPS_BUS_MACHDEP_H_ 35 36 #ifdef BUS_SPACE_DEBUG 37 #include <sys/systm.h> /* for printf() prototype */ 38 /* 39 * Macros for checking the aligned-ness of pointers passed to bus 40 * space ops. Strict alignment is required by the MIPS architecture, 41 * and a trap will occur if unaligned access is performed. These 42 * may aid in the debugging of a broken device driver by displaying 43 * useful information about the problem. 44 */ 45 #define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \ 46 ((((u_long)(p)) & (sizeof(t)-1)) == 0) 47 48 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \ 49 ({ \ 50 if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \ 51 printf("%s 0x%lx not aligned to %d bytes %s:%d\n", \ 52 d, (u_long)(p), sizeof(t), __FILE__, __LINE__); \ 53 } \ 54 (void) 0; \ 55 }) 56 57 #define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t) 58 #else 59 #define __BUS_SPACE_ADDRESS_SANITY(p,t,d) (void) 0 60 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 61 #endif /* BUS_SPACE_DEBUG */ 62 63 #endif /* _HPCMIPS_BUS_MACHDEP_H_ */ 64