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make the TB cache independent of MMU mappings (faster MMU context switches and needed for SMP support)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1632 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-11-20 10:35:40 +00:00
parent 313adae905
commit 8a40a180d3
3 changed files with 208 additions and 428 deletions
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35
exec-all.h
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@ -105,9 +105,6 @@ int tlb_set_page(CPUState *env, target_ulong vaddr,
#define CODE_GEN_MAX_SIZE 65536
#define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */
#define CODE_GEN_HASH_BITS 15
#define CODE_GEN_HASH_SIZE (1 << CODE_GEN_HASH_BITS)
#define CODE_GEN_PHYS_HASH_BITS 15
#define CODE_GEN_PHYS_HASH_SIZE (1 << CODE_GEN_PHYS_HASH_BITS)
@ -167,7 +164,6 @@ typedef struct TranslationBlock {
#define CF_SINGLE_INSN 0x0008 /* compile only a single instruction */
uint8_t *tc_ptr; /* pointer to the translated code */
struct TranslationBlock *hash_next; /* next matching tb for virtual address */
/* next matching tb for physical address. */
struct TranslationBlock *phys_hash_next;
/* first and second physical page containing code. The lower bit
@ -191,9 +187,9 @@ typedef struct TranslationBlock {
struct TranslationBlock *jmp_first;
} TranslationBlock;
static inline unsigned int tb_hash_func(target_ulong pc)
static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
{
return pc & (CODE_GEN_HASH_SIZE - 1);
return (pc ^ (pc >> TB_JMP_CACHE_BITS)) & (TB_JMP_CACHE_SIZE - 1);
}
static inline unsigned int tb_phys_hash_func(unsigned long pc)
@ -203,41 +199,14 @@ static inline unsigned int tb_phys_hash_func(unsigned long pc)
TranslationBlock *tb_alloc(target_ulong pc);
void tb_flush(CPUState *env);
void tb_link(TranslationBlock *tb);
void tb_link_phys(TranslationBlock *tb,
target_ulong phys_pc, target_ulong phys_page2);
extern TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE];
extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
extern uint8_t *code_gen_ptr;
/* find a translation block in the translation cache. If not found,
return NULL and the pointer to the last element of the list in pptb */
static inline TranslationBlock *tb_find(TranslationBlock ***pptb,
target_ulong pc,
target_ulong cs_base,
unsigned int flags)
{
TranslationBlock **ptb, *tb;
unsigned int h;
h = tb_hash_func(pc);
ptb = &tb_hash[h];
for(;;) {
tb = *ptb;
if (!tb)
break;
if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags)
return tb;
ptb = &tb->hash_next;
}
*pptb = ptb;
return NULL;
}
#if defined(USE_DIRECT_JUMP)
#if defined(__powerpc__)