1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef __INCLUDE_RTE_LRU_H__ 35 #define __INCLUDE_RTE_LRU_H__ 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 #include <rte_config.h> 42 #ifdef RTE_ARCH_X86_64 43 #include "rte_lru_x86.h" 44 #elif defined(RTE_ARCH_ARM64) 45 #include "rte_lru_arm64.h" 46 #else 47 #undef RTE_TABLE_HASH_LRU_STRATEGY 48 #define RTE_TABLE_HASH_LRU_STRATEGY 1 49 #endif 50 51 #if RTE_TABLE_HASH_LRU_STRATEGY == 0 52 53 #define lru_init(bucket) \ 54 do \ 55 bucket = bucket; \ 56 while (0) 57 58 #define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU) 59 60 #define lru_update(bucket, mru_val) \ 61 do { \ 62 bucket = bucket; \ 63 mru_val = mru_val; \ 64 } while (0) 65 66 #elif RTE_TABLE_HASH_LRU_STRATEGY == 1 67 68 #define lru_init(bucket) \ 69 do \ 70 bucket->lru_list = 0x0000000100020003LLU; \ 71 while (0) 72 73 #define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU) 74 75 #define lru_update(bucket, mru_val) \ 76 do { \ 77 uint64_t x, pos, x0, x1, x2, mask; \ 78 \ 79 x = bucket->lru_list; \ 80 \ 81 pos = 4; \ 82 if ((x >> 48) == ((uint64_t) mru_val)) \ 83 pos = 3; \ 84 \ 85 if (((x >> 32) & 0xFFFFLLU) == ((uint64_t) mru_val)) \ 86 pos = 2; \ 87 \ 88 if (((x >> 16) & 0xFFFFLLU) == ((uint64_t) mru_val)) \ 89 pos = 1; \ 90 \ 91 if ((x & 0xFFFFLLU) == ((uint64_t) mru_val)) \ 92 pos = 0; \ 93 \ 94 \ 95 pos <<= 4; \ 96 mask = (~0LLU) << pos; \ 97 x0 = x & (~mask); \ 98 x1 = (x >> 16) & mask; \ 99 x2 = (x << (48 - pos)) & (0xFFFFLLU << 48); \ 100 x = x0 | x1 | x2; \ 101 \ 102 if (pos != 64) \ 103 bucket->lru_list = x; \ 104 } while (0) 105 106 #elif (RTE_TABLE_HASH_LRU_STRATEGY == 2) || (RTE_TABLE_HASH_LRU_STRATEGY == 3) 107 108 /** 109 * These strategies are implemented in architecture specific header files. 110 */ 111 112 #else 113 114 #error "Incorrect value for RTE_TABLE_HASH_LRU_STRATEGY" 115 116 #endif 117 118 #ifdef __cplusplus 119 } 120 #endif 121 122 #endif 123