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[v1,27/30] target-sparc: add ST_BLKINIT_ ASIs for UA2005+ CPUs

Message ID 2a2d02ba23fab8af86050d4cfd00fd8f93f3b992.1478291230.git.atar4qemu@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Artyom Tarasenko Nov. 4, 2016, 8:50 p.m. UTC 
In OpenSPARC T1+ TWINX ASIs in store instructions are aliased
with Block Initializing Store ASIs.

"UltraSPARC T1 Supplement Draft D2.1, 14 May 2007" describes them
in the chapter "5.9 Block Initializing Store ASIs"

Integer stores of all sizes are allowed with these ASIs.

Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
---
 target-sparc/translate.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index 53c327d..e929169 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -2321,8 +2321,19 @@  static void gen_st_asi(DisasContext *dc, TCGv src, TCGv addr,
     case GET_ASI_EXCP:
         break;
     case GET_ASI_DTWINX: /* Reserved for stda.  */
+#ifndef TARGET_SPARC64
         gen_exception(dc, TT_ILL_INSN);
         break;
+#else
+        if (!(dc->def->features & CPU_FEATURE_HYPV)) {
+            /* Pre OpenSPARC CPUs don't have these */
+            gen_exception(dc, TT_ILL_INSN);
+            return;
+        }
+        /* in OpenSPARC T1+ CPUs TWINX ASIs in store instructions
+         * are ST_BLKINIT_ ASIs */
+        /* fall through */
+#endif
     case GET_ASI_DIRECT:
         gen_address_mask(dc, addr);
         tcg_gen_qemu_st_tl(src, addr, da.mem_idx, da.memop);