diff options
| -rw-r--r-- | exec-all.h | 4 | ||||
| -rw-r--r-- | exec.c | 68 |
2 files changed, 52 insertions, 20 deletions
@@ -77,7 +77,7 @@ int cpu_restore_state(struct TranslationBlock *tb, CPUState *env, unsigned long searched_pc); void cpu_exec_init(void); int page_unprotect(unsigned long address); -void page_unmap(void); +void tb_invalidate_page(unsigned long address); void tlb_flush_page(CPUState *env, uint32_t addr); void tlb_flush_page_write(CPUState *env, uint32_t addr); void tlb_flush(CPUState *env); @@ -127,7 +127,7 @@ static inline unsigned int tb_hash_func(unsigned long pc) } TranslationBlock *tb_alloc(unsigned long pc); -void tb_flush(void); +void tb_flush(CPUState *env); void tb_link(TranslationBlock *tb); extern TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE]; @@ -62,7 +62,6 @@ typedef struct PageDesc { #define L1_SIZE (1 << L1_BITS) #define L2_SIZE (1 << L2_BITS) -static void tb_invalidate_page(unsigned long address); static void io_mem_init(void); unsigned long real_host_page_size; @@ -229,15 +228,19 @@ static void page_flush_tb(void) /* flush all the translation blocks */ /* XXX: tb_flush is currently not thread safe */ -void tb_flush(void) +void tb_flush(CPUState *env) { int i; -#ifdef DEBUG_FLUSH +#if defined(DEBUG_FLUSH) printf("qemu: flush code_size=%d nb_tbs=%d avg_tb_size=%d\n", code_gen_ptr - code_gen_buffer, nb_tbs, - (code_gen_ptr - code_gen_buffer) / nb_tbs); + nb_tbs > 0 ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0); #endif + /* must reset current TB so that interrupts cannot modify the + links while we are modifying them */ + env->current_tb = NULL; + nb_tbs = 0; for(i = 0;i < CODE_GEN_HASH_SIZE; i++) tb_hash[i] = NULL; @@ -402,7 +405,7 @@ static inline void tb_invalidate(TranslationBlock *tb, int parity) } /* invalidate all TBs which intersect with the target page starting at addr */ -static void tb_invalidate_page(unsigned long address) +void tb_invalidate_page(unsigned long address) { TranslationBlock *tb_next, *tb; unsigned int page_index; @@ -626,7 +629,7 @@ static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) /* suppress the jump to next tb in generated code */ tb_reset_jump(tb, n); - /* suppress jumps in the tb on which we could have jump */ + /* suppress jumps in the tb on which we could have jumped */ tb_reset_jump_recursive(tb_next); } } @@ -688,7 +691,7 @@ void cpu_single_step(CPUState *env, int enabled) if (env->singlestep_enabled != enabled) { env->singlestep_enabled = enabled; /* must flush all the translated code to avoid inconsistancies */ - tb_flush(); + tb_flush(env); } #endif } @@ -712,7 +715,7 @@ void cpu_set_log_filename(const char *filename) logfilename = strdup(filename); } -/* mask must never be zero */ +/* mask must never be zero, except for A20 change call */ void cpu_interrupt(CPUState *env, int mask) { TranslationBlock *tb; @@ -742,9 +745,10 @@ void cpu_abort(CPUState *env, const char *fmt, ...) abort(); } -#ifdef TARGET_I386 +#if !defined(CONFIG_USER_ONLY) + /* unmap all maped pages and flush all associated code */ -void page_unmap(void) +static void page_unmap(CPUState *env) { PageDesc *pmap; int i; @@ -784,21 +788,25 @@ void page_unmap(void) l1_map[i] = NULL; } } - tb_flush(); + tb_flush(env); } -#endif void tlb_flush(CPUState *env) { -#if !defined(CONFIG_USER_ONLY) int i; + + /* must reset current TB so that interrupts cannot modify the + links while we are modifying them */ + env->current_tb = NULL; + for(i = 0; i < CPU_TLB_SIZE; i++) { env->tlb_read[0][i].address = -1; env->tlb_write[0][i].address = -1; env->tlb_read[1][i].address = -1; env->tlb_write[1][i].address = -1; } -#endif + /* XXX: avoid flushing the TBs */ + page_unmap(env); } static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr) @@ -810,8 +818,11 @@ static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, uint32_t addr) void tlb_flush_page(CPUState *env, uint32_t addr) { -#if !defined(CONFIG_USER_ONLY) - int i; + int i, flags; + + /* must reset current TB so that interrupts cannot modify the + links while we are modifying them */ + env->current_tb = NULL; addr &= TARGET_PAGE_MASK; i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); @@ -819,23 +830,44 @@ void tlb_flush_page(CPUState *env, uint32_t addr) tlb_flush_entry(&env->tlb_write[0][i], addr); tlb_flush_entry(&env->tlb_read[1][i], addr); tlb_flush_entry(&env->tlb_write[1][i], addr); + + flags = page_get_flags(addr); + if (flags & PAGE_VALID) { +#if !defined(CONFIG_SOFTMMU) + munmap((void *)addr, TARGET_PAGE_SIZE); #endif + page_set_flags(addr, addr + TARGET_PAGE_SIZE, 0); + } } /* make all write to page 'addr' trigger a TLB exception to detect self modifying code */ void tlb_flush_page_write(CPUState *env, uint32_t addr) { -#if !defined(CONFIG_USER_ONLY) int i; addr &= TARGET_PAGE_MASK; i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); tlb_flush_entry(&env->tlb_write[0][i], addr); tlb_flush_entry(&env->tlb_write[1][i], addr); -#endif } +#else + +void tlb_flush(CPUState *env) +{ +} + +void tlb_flush_page(CPUState *env, uint32_t addr) +{ +} + +void tlb_flush_page_write(CPUState *env, uint32_t addr) +{ +} + +#endif /* defined(CONFIG_USER_ONLY) */ + static inline unsigned long *physpage_find_alloc(unsigned int page) { unsigned long **lp, *p; |