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