target/arm: Move arm_debug_target_el to debug_helper.c

This function is no longer used outside debug_helper.c.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220609202901.1177572-23-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/target/arm/debug_helper.c b/target/arm/debug_helper.c
index 26004df..b18a6bd 100644
--- a/target/arm/debug_helper.c
+++ b/target/arm/debug_helper.c
@@ -12,6 +12,27 @@
 #include "exec/helper-proto.h"
 
 
+/* Return the Exception Level targeted by debug exceptions. */
+static int arm_debug_target_el(CPUARMState *env)
+{
+    bool secure = arm_is_secure(env);
+    bool route_to_el2 = false;
+
+    if (arm_is_el2_enabled(env)) {
+        route_to_el2 = env->cp15.hcr_el2 & HCR_TGE ||
+                       env->cp15.mdcr_el2 & MDCR_TDE;
+    }
+
+    if (route_to_el2) {
+        return 2;
+    } else if (arm_feature(env, ARM_FEATURE_EL3) &&
+               !arm_el_is_aa64(env, 3) && secure) {
+        return 3;
+    } else {
+        return 1;
+    }
+}
+
 /*
  * Raise an exception to the debug target el.
  * Modify syndrome to indicate when origin and target EL are the same.