LXR linux/drivers/staging/vc04_services/interface/vchiq_arm/vchiq

   1/**
   2 * Copyright (c) 2010-2012 Broadcom. All rights reserved.
   3 *
   4 * Redistribution and use in source and binary forms, with or without
   5 * modification, are permitted provided that the following conditions
   6 * are met:
   7 * 1. Redistributions of source code must retain the above copyright
   8 *    notice, this list of conditions, and the following disclaimer,
   9 *    without modification.
  10 * 2. Redistributions in binary form must reproduce the above copyright
  11 *    notice, this list of conditions and the following disclaimer in the
  12 *    documentation and/or other materials provided with the distribution.
  13 * 3. The names of the above-listed copyright holders may not be used
  14 *    to endorse or promote products derived from this software without
  15 *    specific prior written permission.
  16 *
  17 * ALTERNATIVELY, this software may be distributed under the terms of the
  18 * GNU General Public License ("GPL") version 2, as published by the Free
  19 * Software Foundation.
  20 *
  21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 */
  33
  34#ifndef VCHIQ_PAGELIST_H
  35#define VCHIQ_PAGELIST_H
  36
  37#ifndef PAGE_SIZE
  38#define PAGE_SIZE 4096
  39#endif
  40#define CACHE_LINE_SIZE 32
  41#define PAGELIST_WRITE 0
  42#define PAGELIST_READ 1
  43#define PAGELIST_READ_WITH_FRAGMENTS 2
  44
  45typedef struct pagelist_struct {
  46        unsigned long length;
  47        unsigned short type;
  48        unsigned short offset;
  49        unsigned long addrs[1]; /* N.B. 12 LSBs hold the number of following
  50                                   pages at consecutive addresses. */
  51} PAGELIST_T;
  52
  53typedef struct fragments_struct {
  54        char headbuf[CACHE_LINE_SIZE];
  55        char tailbuf[CACHE_LINE_SIZE];
  56} FRAGMENTS_T;
  57
  58#endif /* VCHIQ_PAGELIST_H */
  59