1/* 2 * internal execution defines for qemu 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20#ifndef EXEC_TB_HASH 21#define EXEC_TB_HASH 22 23/* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for 24 addresses on the same page. The top bits are the same. This allows 25 TLB invalidation to quickly clear a subset of the hash table. */ 26#define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2) 27#define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS) 28#define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1) 29#define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE) 30 31static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc) 32{ 33 target_ulong tmp; 34 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)); 35 return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK; 36} 37 38static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc) 39{ 40 target_ulong tmp; 41 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)); 42 return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK) 43 | (tmp & TB_JMP_ADDR_MASK)); 44} 45 46static inline unsigned int tb_phys_hash_func(tb_page_addr_t pc) 47{ 48 return (pc >> 2) & (CODE_GEN_PHYS_HASH_SIZE - 1); 49} 50 51#endif 52