@@ -111,17 +111,6 @@ static int tcg_init(MachineState *ms)
tcg_exec_init(s->tb_size * 1024 * 1024, s->splitwx_enabled);
mttcg_enabled = s->mttcg_enabled;
-
- /*
- * Initialize TCG regions only for softmmu.
- *
- * This needs to be done later for user mode, because the prologue
- * generation needs to be delayed so that GUEST_BASE is already set.
- */
-#ifndef CONFIG_USER_ONLY
- tcg_region_init();
-#endif /* !CONFIG_USER_ONLY */
-
return 0;
}
@@ -1339,6 +1339,9 @@ void tcg_exec_init(unsigned long tb_size, int splitwx)
splitwx, &error_fatal);
assert(ok);
+ /* TODO: allocating regions is hand-in-glove with code_gen_buffer. */
+ tcg_region_init();
+
#if defined(CONFIG_SOFTMMU)
/* There's no guest base to take into account, so go ahead and
initialize the prologue now. */
@@ -879,7 +879,6 @@ int main(int argc, char **argv)
* the real value of GUEST_BASE into account.
*/
tcg_prologue_init(tcg_ctx);
- tcg_region_init();
/* build Task State */
memset(ts, 0, sizeof(TaskState));
@@ -868,7 +868,6 @@ int main(int argc, char **argv, char **envp)
generating the prologue until now so that the prologue can take
the real value of GUEST_BASE into account. */
tcg_prologue_init(tcg_ctx);
- tcg_region_init();
target_cpu_copy_regs(env, regs);
@@ -1206,32 +1206,18 @@ TranslationBlock *tcg_tb_alloc(TCGContext *s)
void tcg_prologue_init(TCGContext *s)
{
- size_t prologue_size, total_size;
- void *buf0, *buf1;
+ size_t prologue_size;
/* Put the prologue at the beginning of code_gen_buffer. */
- buf0 = s->code_gen_buffer;
- total_size = s->code_gen_buffer_size;
- s->code_ptr = buf0;
- s->code_buf = buf0;
+ tcg_region_assign(s, 0);
+ s->code_ptr = s->code_gen_ptr;
+ s->code_buf = s->code_gen_ptr;
s->data_gen_ptr = NULL;
- /*
- * The region trees are not yet configured, but tcg_splitwx_to_rx
- * needs the bounds for an assert.
- */
- region.start = buf0;
- region.end = buf0 + total_size;
-
#ifndef CONFIG_TCG_INTERPRETER
- tcg_qemu_tb_exec = (tcg_prologue_fn *)tcg_splitwx_to_rx(buf0);
+ tcg_qemu_tb_exec = (tcg_prologue_fn *)tcg_splitwx_to_rx(s->code_ptr);
#endif
- /* Compute a high-water mark, at which we voluntarily flush the buffer
- and start over. The size here is arbitrary, significantly larger
- than we expect the code generation for any one opcode to require. */
- s->code_gen_highwater = s->code_gen_buffer + (total_size - TCG_HIGHWATER);
-
#ifdef TCG_TARGET_NEED_POOL_LABELS
s->pool_labels = NULL;
#endif
@@ -1248,32 +1234,32 @@ void tcg_prologue_init(TCGContext *s)
}
#endif
- buf1 = s->code_ptr;
+ prologue_size = tcg_current_code_size(s);
+
#ifndef CONFIG_TCG_INTERPRETER
- flush_idcache_range((uintptr_t)tcg_splitwx_to_rx(buf0), (uintptr_t)buf0,
- tcg_ptr_byte_diff(buf1, buf0));
+ flush_idcache_range((uintptr_t)tcg_splitwx_to_rx(s->code_buf),
+ (uintptr_t)s->code_buf, prologue_size);
#endif
- /* Deduct the prologue from the buffer. */
- prologue_size = tcg_current_code_size(s);
- s->code_gen_ptr = buf1;
- s->code_gen_buffer = buf1;
- s->code_buf = buf1;
- total_size -= prologue_size;
- s->code_gen_buffer_size = total_size;
+ /* Deduct the prologue from the first region. */
+ region.start = s->code_ptr;
- tcg_register_jit(tcg_splitwx_to_rx(s->code_gen_buffer), total_size);
+ /* Recompute boundaries of the first region. */
+ tcg_region_assign(s, 0);
+
+ tcg_register_jit(tcg_splitwx_to_rx(region.start),
+ region.end - region.start);
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
FILE *logfile = qemu_log_lock();
qemu_log("PROLOGUE: [size=%zu]\n", prologue_size);
if (s->data_gen_ptr) {
- size_t code_size = s->data_gen_ptr - buf0;
+ size_t code_size = s->data_gen_ptr - s->code_gen_ptr;
size_t data_size = prologue_size - code_size;
size_t i;
- log_disas(buf0, code_size);
+ log_disas(s->code_gen_ptr, code_size);
for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
if (sizeof(tcg_target_ulong) == 8) {
@@ -1287,7 +1273,7 @@ void tcg_prologue_init(TCGContext *s)
}
}
} else {
- log_disas(buf0, prologue_size);
+ log_disas(s->code_gen_ptr, prologue_size);
}
qemu_log("\n");
qemu_log_flush();