target-arm: refactor cp15.c13 register access

Access the cp15.c13 TLS registers directly with TCG ops instead of with
a slow helper. If the the cp15 read/write was not TLS register access,
fall back to the cp15 helper.

This makes accessing __thread variables in linux-user when apps are compiled
with -mtp=cp15 possible. legal cp15 register to acces from linux-user are
already checked in cp15_user_ok.

While at it, make the cp15.c13 Thread ID registers available only on
ARMv6K and newer.

Signed-off-by: Riku Voipio <riku.voipio@nokia.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/target-arm/helper.c b/target-arm/helper.c
index b3aec9944..27001e86a 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -511,7 +511,6 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
 uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
 {
     cpu_abort(env, "cp15 insn %08x\n", insn);
-    return 0;
 }
 
 /* These should probably raise undefined insn exceptions.  */
@@ -1491,15 +1490,6 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
               tlb_flush(env, 0);
             env->cp15.c13_context = val;
             break;
-        case 2:
-            env->cp15.c13_tls1 = val;
-            break;
-        case 3:
-            env->cp15.c13_tls2 = val;
-            break;
-        case 4:
-            env->cp15.c13_tls3 = val;
-            break;
         default:
             goto bad_reg;
         }
@@ -1779,12 +1769,6 @@ uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
             return env->cp15.c13_fcse;
         case 1:
             return env->cp15.c13_context;
-        case 2:
-            return env->cp15.c13_tls1;
-        case 3:
-            return env->cp15.c13_tls2;
-        case 4:
-            return env->cp15.c13_tls3;
         default:
             goto bad_reg;
         }