sys/arch/hpcmips/include/bus_machdep.h

   1 /*      $NetBSD: bus_machdep.h,v 1.2 2007/10/26 11:07:32 he 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_ */