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diff --git a/target-unicore32/exec.h b/target-unicore32/exec.h
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+/*
+ * UniCore32 execution defines
+ *
+ * Copyright (C) 2010-2011 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UC32_EXEC_H__
+#define __UC32_EXEC_H__
+
+#include "config.h"
+#include "dyngen-exec.h"
+
+register struct CPUState_UniCore32 *env asm(AREG0);
+
+#include "cpu.h"
+#include "exec-all.h"
+
+static inline void env_to_regs(void)
+{
+}
+
+static inline void regs_to_env(void)
+{
+}
+
+static inline int cpu_has_work(CPUState *env)
+{
+ return env->interrupt_request &
+ (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
+}
+
+static inline int cpu_halted(CPUState *env)
+{
+ if (!env->halted) {
+ return 0;
+ }
+ /* An interrupt wakes the CPU even if the I and R ASR bits are
+ set. We use EXITTB to silently wake CPU without causing an
+ actual interrupt. */
+ if (cpu_has_work(env)) {
+ env->halted = 0;
+ return 0;
+ }
+ return EXCP_HALTED;
+}
+
+#endif /* __UC32_EXEC_H__ */