overall/alpha tcg cpus|hppa: Fix Lesser GPL version number
[qemu.git] / include / exec / tb-hash.h
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 "qemu/xxhash.h"
26
27 #ifdef CONFIG_SOFTMMU
28
29 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
30 addresses on the same page. The top bits are the same. This allows
31 TLB invalidation to quickly clear a subset of the hash table. */
32 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
33 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
34 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
35 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
36
37 static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc)
38 {
39 target_ulong tmp;
40 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
41 return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK;
42 }
43
44 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
45 {
46 target_ulong tmp;
47 tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
48 return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK)
49 | (tmp & TB_JMP_ADDR_MASK));
50 }
51
52 #else
53
54 /* In user-mode we can get better hashing because we do not have a TLB */
55 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
56 {
57 return (pc ^ (pc >> TB_JMP_CACHE_BITS)) & (TB_JMP_CACHE_SIZE - 1);
58 }
59
60 #endif /* CONFIG_SOFTMMU */
61
62 static inline
63 uint32_t tb_hash_func(tb_page_addr_t phys_pc, target_ulong pc, uint32_t flags,
64 uint32_t cf_mask, uint32_t trace_vcpu_dstate)
65 {
66 return qemu_xxhash7(phys_pc, pc, flags, cf_mask, trace_vcpu_dstate);
67 }
68
69 #endif