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 2.1 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_H 21 #define EXEC_TB_HASH_H 22 23 #include "exec/cpu-defs.h" 24 #include "exec/exec-all.h" 25 #include "exec/translation-block.h" 26 #include "qemu/xxhash.h" 27 #include "tb-jmp-cache.h" 28 29 #ifdef CONFIG_SOFTMMU 30 31 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for 32 addresses on the same page. The top bits are the same. This allows 33 TLB invalidation to quickly clear a subset of the hash table. */ 34 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2) 35 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS) 36 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1) 37 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE) 38 39 static inline unsigned int tb_jmp_cache_hash_page(vaddr pc) 40 { 41 vaddr tmp; 42 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)); 43 return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK; 44 } 45 46 static inline unsigned int tb_jmp_cache_hash_func(vaddr pc) 47 { 48 vaddr tmp; 49 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)); 50 return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK) 51 | (tmp & TB_JMP_ADDR_MASK)); 52 } 53 54 #else 55 56 /* In user-mode we can get better hashing because we do not have a TLB */ 57 static inline unsigned int tb_jmp_cache_hash_func(vaddr pc) 58 { 59 return (pc ^ (pc >> TB_JMP_CACHE_BITS)) & (TB_JMP_CACHE_SIZE - 1); 60 } 61 62 #endif /* CONFIG_SOFTMMU */ 63 64 static inline 65 uint32_t tb_hash_func(tb_page_addr_t phys_pc, vaddr pc, 66 uint32_t flags, uint64_t flags2, uint32_t cf_mask) 67 { 68 return qemu_xxhash8(phys_pc, pc, flags2, flags, cf_mask); 69 } 70 71 #endif 72