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support for new TLB handling 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@513 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-01-04 17:43:01 +00:00
parent 17348a7f5e
commit 1376847f9f
1 changed files with 47 additions and 2 deletions
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49
cpu-exec.c
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@ -262,7 +262,42 @@ int cpu_exec(CPUState *env1)
tb = tb_find(&ptb, (unsigned long)pc, (unsigned long)cs_base,
flags);
if (!tb) {
TranslationBlock **ptb1;
unsigned int h;
target_ulong phys_pc, phys_page1, phys_page2, virt_page2;
spin_lock(&tb_lock);
tb_invalidated_flag = 0;
/* find translated block using physical mappings */
phys_pc = get_phys_addr_code(env, (unsigned long)pc);
phys_page1 = phys_pc & TARGET_PAGE_MASK;
phys_page2 = -1;
h = tb_phys_hash_func(phys_pc);
ptb1 = &tb_phys_hash[h];
for(;;) {
tb = *ptb1;
if (!tb)
goto not_found;
if (tb->pc == (unsigned long)pc &&
tb->page_addr[0] == phys_page1 &&
tb->cs_base == (unsigned long)cs_base &&
tb->flags == flags) {
/* check next page if needed */
virt_page2 = ((unsigned long)pc + tb->size - 1) & TARGET_PAGE_MASK;
if (((unsigned long)pc & TARGET_PAGE_MASK) != virt_page2) {
phys_page2 = get_phys_addr_code(env, virt_page2);
if (tb->page_addr[1] == phys_page2)
goto found;
} else {
goto found;
}
}
ptb1 = &tb->phys_hash_next;
}
not_found:
/* if no translated code available, then translate it now */
tb = tb_alloc((unsigned long)pc);
if (!tb) {
@ -278,8 +313,18 @@ int cpu_exec(CPUState *env1)
tb->tc_ptr = tc_ptr;
tb->cs_base = (unsigned long)cs_base;
tb->flags = flags;
tb_invalidated_flag = 0;
cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size);
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
/* check next page if needed */
virt_page2 = ((unsigned long)pc + tb->size - 1) & TARGET_PAGE_MASK;
phys_page2 = -1;
if (((unsigned long)pc & TARGET_PAGE_MASK) != virt_page2) {
phys_page2 = get_phys_addr_code(env, virt_page2);
}
tb_link_phys(tb, phys_pc, phys_page2);
found:
if (tb_invalidated_flag) {
/* as some TB could have been invalidated because
of memory exceptions while generating the code, we
@ -289,10 +334,10 @@ int cpu_exec(CPUState *env1)
ptb = &(*ptb)->hash_next;
T0 = 0;
}
/* we add the TB in the virtual pc hash table */
*ptb = tb;
tb->hash_next = NULL;
tb_link(tb);
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
spin_unlock(&tb_lock);
}
#ifdef DEBUG_EXEC