| 1 | /* |
| 2 | * The per-CPU TranslationBlock jump cache. |
| 3 | * |
| 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | |
| 9 | #ifndef ACCEL_TCG_TB_JMP_CACHE_H |
| 10 | #define ACCEL_TCG_TB_JMP_CACHE_H |
| 11 | |
| 12 | #include "qemu/rcu.h" |
| 13 | #include "exec/cpu-common.h" |
| 14 | |
| 15 | #define TB_JMP_CACHE_BITS 12 |
| 16 | #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) |
| 17 | |
| 18 | /* |
| 19 | * Invalidated in parallel; all accesses to 'tb' must be atomic. |
| 20 | * A valid entry is read/written by a single CPU, therefore there is |
| 21 | * no need for qatomic_rcu_read() and pc is always consistent with a |
| 22 | * non-NULL value of 'tb'. Strictly speaking pc is only needed for |
| 23 | * CF_PCREL, but it's used always for simplicity. |
| 24 | */ |
| 25 | typedef struct CPUJumpCache { |
| 26 | struct rcu_head rcu; |
| 27 | struct { |
| 28 | TranslationBlock *tb; |
| 29 | vaddr pc; |
| 30 | } array[TB_JMP_CACHE_SIZE]; |
| 31 | } CPUJumpCache; |
| 32 | |
| 33 | #endif /* ACCEL_TCG_TB_JMP_CACHE_H */ |