target-sh4: Let cpu_sh4_init() return SuperHCPU

Turn cpu_init macro into a static inline function returning
CPUSH4State for backwards compatibility.
Signed-off-by: NAndreas Färber <afaerber@suse.de>

target-sh4/cpu.h

@@ -191,7 +191,7 @@ typedef struct CPUSH4State {
 
 #include "cpu-qom.h"
 
-CPUSH4State *cpu_sh4_init(const char *cpu_model);
+SuperHCPU *cpu_sh4_init(const char *cpu_model);
 int cpu_sh4_exec(CPUSH4State * s);
 int cpu_sh4_signal_handler(int host_signum, void *pinfo,
                            void *puc);
@@ -232,7 +232,15 @@ void cpu_load_tlb(CPUSH4State * env);
 
 #include "softfloat.h"
 
-#define cpu_init cpu_sh4_init
+static inline CPUSH4State *cpu_init(const char *cpu_model)
+{
+    SuperHCPU *cpu = cpu_sh4_init(cpu_model);
+    if (cpu == NULL) {
+        return NULL;
+    }
+    return &cpu->env;
+}
+
 #define cpu_exec cpu_sh4_exec
 #define cpu_gen_code cpu_sh4_gen_code
 #define cpu_signal_handler cpu_sh4_signal_handler

target-sh4/translate.c

@@ -247,7 +247,7 @@ static void cpu_register(CPUSH4State *env, const sh4_def_t *def)
     env->id = def->id;
 }
 
-CPUSH4State *cpu_sh4_init(const char *cpu_model)
+SuperHCPU *cpu_sh4_init(const char *cpu_model)
 {
     SuperHCPU *cpu;
     CPUSH4State *env;
@@ -264,7 +264,7 @@ CPUSH4State *cpu_sh4_init(const char *cpu_model)
     cpu_reset(CPU(cpu));
     cpu_register(env, def);
     qemu_init_vcpu(env);
-    return env;
+    return cpu;
 }
 
 static void gen_goto_tb(DisasContext * ctx, int n, target_ulong dest)