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[Qemu-devel] [PATCH v2] microblaze: Add support for the sleep insn
From: |
edgar . iglesias |
Subject: |
[Qemu-devel] [PATCH v2] microblaze: Add support for the sleep insn |
Date: |
Sat, 30 Mar 2013 15:12:24 +0100 |
From: "Edgar E. Iglesias" <address@hidden>
Signed-off-by: Edgar E. Iglesias <address@hidden>
---
target-microblaze/translate.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index a74da8e..06d2346 100644
--- a/target-microblaze/translate.c
+++ b/target-microblaze/translate.c
@@ -1317,6 +1317,23 @@ static void dec_br(DisasContext *dc)
/* Memory barrier. */
mbar = (dc->ir >> 16) & 31;
if (mbar == 2 && dc->imm == 4) {
+ /* mbar IMM & 16 decodes to sleep. */
+ if (dc->rd & 16) {
+ TCGv_i32 tmp_hlt = tcg_const_i32(EXCP_HLT);
+ TCGv_i32 tmp_1 = tcg_const_i32(1);
+
+ LOG_DIS("sleep\n");
+
+ t_sync_flags(dc);
+ tcg_gen_st_i32(tmp_1, cpu_env,
+ -offsetof(MicroBlazeCPU, env)
+ +offsetof(CPUState, halted));
+ tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
+ gen_helper_raise_exception(cpu_env, tmp_hlt);
+ tcg_temp_free_i32(tmp_hlt);
+ tcg_temp_free_i32(tmp_1);
+ return;
+ }
LOG_DIS("mbar %d\n", dc->rd);
/* Break the TB. */
dc->cpustate_changed = 1;
--
1.7.9.5
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