From: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Date: Thu, 28 Mar 2013 21:59:03 +0000 (+0100)
Subject: microblaze: Add support for the sleep insn
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.1~900^2~59^2~474
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5d45de9796539f95eb6b1201588362981f8cb2d4;p=sdk%2Femulator%2Fqemu.git

microblaze: Add support for the sleep insn

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---

diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index a74da8e1a5..06d23460f9 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;