1 /***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28 /*
29 * Packet buffer defines.
30 */
31
32 #ifndef __CVMX_PACKET_H__
33 #define __CVMX_PACKET_H__
34
35 /**
36 * This structure defines a buffer pointer on Octeon
37 */
38 union cvmx_buf_ptr {
39 void *ptr;
40 uint64_t u64;
41 struct {
42 #ifdef __BIG_ENDIAN_BITFIELD
43 /* if set, invert the "free" pick of the overall
44 * packet. HW always sets this bit to 0 on inbound
45 * packet */
46 uint64_t i:1;
47
48 /* Indicates the amount to back up to get to the
49 * buffer start in cache lines. In most cases this is
50 * less than one complete cache line, so the value is
51 * zero */
52 uint64_t back:4;
53 /* The pool that the buffer came from / goes to */
54 uint64_t pool:3;
55 /* The size of the segment pointed to by addr (in bytes) */
56 uint64_t size:16;
57 /* Pointer to the first byte of the data, NOT buffer */
58 uint64_t addr:40;
59 #else
60 uint64_t addr:40;
61 uint64_t size:16;
62 uint64_t pool:3;
63 uint64_t back:4;
64 uint64_t i:1;
65 #endif
66 } s;
67 };
68
69 #endif /* __CVMX_PACKET_H__ */
70
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