2 * internal execution defines for qemu
4 * Copyright (c) 2003 Fabrice Bellard
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.
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.
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/>.
20 #ifndef EXEC_TB_HASH_H
21 #define EXEC_TB_HASH_H
23 #include "exec/cpu-defs.h"
24 #include "exec/exec-all.h"
25 #include "qemu/xxhash.h"
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)
37 static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc
)
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
;
44 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc
)
46 pc
= pc
^ (pc
>> (TARGET_PAGE_BITS
- TB_JMP_PAGE_BITS
));
47 return (((pc
>> (TARGET_PAGE_BITS
- TB_JMP_PAGE_BITS
)) & TB_JMP_PAGE_MASK
)
48 | (pc
& TB_JMP_ADDR_MASK
));
53 /* In user-mode we can get better hashing because we do not have a TLB */
54 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc
)
56 return (pc
^ (pc
>> TB_JMP_CACHE_BITS
)) & (TB_JMP_CACHE_SIZE
- 1);
59 #endif /* CONFIG_SOFTMMU */
62 uint32_t tb_hash_func(tb_page_addr_t phys_pc
, target_ulong pc
, uint32_t flags
,
63 uint32_t cf_mask
, uint32_t trace_vcpu_dstate
)
65 return qemu_xxhash7(phys_pc
, pc
, flags
, cf_mask
, trace_vcpu_dstate
);