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      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 #undef CACHE_LINE_SIZE
     41 #define CACHE_LINE_SIZE 32
     42 #define PAGELIST_WRITE 0
     43 #define PAGELIST_READ 1
     44 #define PAGELIST_READ_WITH_FRAGMENTS 2
     45 
     46 typedef struct pagelist_struct {
     47 	unsigned long length;
     48 	unsigned short type;
     49 	unsigned short offset;
     50 	unsigned long addrs[1];	/* N.B. 12 LSBs hold the number of following
     51 				   pages at consecutive addresses. */
     52 } PAGELIST_T;
     53 
     54 typedef struct fragments_struct {
     55 	char headbuf[CACHE_LINE_SIZE];
     56 	char tailbuf[CACHE_LINE_SIZE];
     57 } FRAGMENTS_T;
     58 
     59 #endif /* VCHIQ_PAGELIST_H */
     60