target/arm: Split out arm_sctlr

Minimize the number of places that will need updating when
the virtual host extensions are added.
Signed-off-by: NRichard Henderson <richard.henderson@linaro.org>
Message-id: 20190301200501.16533-2-richard.henderson@linaro.org
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target/arm/cpu.h

@@ -3042,11 +3042,20 @@ static inline bool arm_sctlr_b(CPUARMState *env)
         (env->cp15.sctlr_el[1] & SCTLR_B) != 0;
 }
 
+static inline uint64_t arm_sctlr(CPUARMState *env, int el)
+{
+    if (el == 0) {
+        /* FIXME: ARMv8.1-VHE S2 translation regime.  */
+        return env->cp15.sctlr_el[1];
+    } else {
+        return env->cp15.sctlr_el[el];
+    }
+}
+
+
 /* Return true if the processor is in big-endian mode. */
 static inline bool arm_cpu_data_is_big_endian(CPUARMState *env)
 {
-    int cur_el;
-
     /* In 32bit endianness is determined by looking at CPSR's E bit */
     if (!is_a64(env)) {
         return
@@ -3065,15 +3074,12 @@ static inline bool arm_cpu_data_is_big_endian(CPUARMState *env)
             arm_sctlr_b(env) ||
 #endif
                 ((env->uncached_cpsr & CPSR_E) ? 1 : 0);
-    }
-
-    cur_el = arm_current_el(env);
+    } else {
+        int cur_el = arm_current_el(env);
+        uint64_t sctlr = arm_sctlr(env, cur_el);
 
-    if (cur_el == 0) {
-        return (env->cp15.sctlr_el[1] & SCTLR_E0E) != 0;
+        return (sctlr & (cur_el ? SCTLR_EE : SCTLR_E0E)) != 0;
     }
-
-    return (env->cp15.sctlr_el[cur_el] & SCTLR_EE) != 0;
 }
 
 #include "exec/cpu-all.h"

target/arm/helper.c

@@ -12854,12 +12854,8 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
             flags = FIELD_DP32(flags, TBFLAG_A64, ZCR_LEN, zcr_len);
         }
 
-        if (current_el == 0) {
-            /* FIXME: ARMv8.1-VHE S2 translation regime.  */
-            sctlr = env->cp15.sctlr_el[1];
-        } else {
-            sctlr = env->cp15.sctlr_el[current_el];
-        }
+        sctlr = arm_sctlr(env, current_el);
+
         if (cpu_isar_feature(aa64_pauth, cpu)) {
             /*
              * In order to save space in flags, we record only whether