target/xtensa: Convert to 3-phase reset

Convert the xtensa CPU class to use 3-phase reset, so it doesn't
need to use device_class_set_parent_reset() any more.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Edgar E. Iglesias <edgar@zeroasic.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-id: 20221124115023.2437291-20-peter.maydell@linaro.org

target/xtensa/cpu-qom.h

@@ -41,7 +41,7 @@ typedef struct XtensaConfig XtensaConfig;
 /**
  * XtensaCPUClass:
  * @parent_realize: The parent class' realize handler.
- * @parent_reset: The parent class' reset handler.
+ * @parent_phases: The parent class' reset phase handlers.
  * @config: The CPU core configuration.
  *
  * An Xtensa CPU model.
@@ -52,7 +52,7 @@ struct XtensaCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    DeviceReset parent_reset;
+    ResettablePhases parent_phases;
 
     const XtensaConfig *config;
 };

target/xtensa/cpu.c

@@ -85,16 +85,18 @@ bool xtensa_abi_call0(void)
 }
 #endif
 
-static void xtensa_cpu_reset(DeviceState *dev)
+static void xtensa_cpu_reset_hold(Object *obj)
 {
-    CPUState *s = CPU(dev);
+    CPUState *s = CPU(obj);
     XtensaCPU *cpu = XTENSA_CPU(s);
     XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(cpu);
     CPUXtensaState *env = &cpu->env;
     bool dfpu = xtensa_option_enabled(env->config,
                                       XTENSA_OPTION_DFP_COPROCESSOR);
 
-    xcc->parent_reset(dev);
+    if (xcc->parent_phases.hold) {
+        xcc->parent_phases.hold(obj);
+    }
 
     env->pc = env->config->exception_vector[EXC_RESET0 + env->static_vectors];
     env->sregs[LITBASE] &= ~1;
@@ -240,11 +242,13 @@ static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
     DeviceClass *dc = DEVICE_CLASS(oc);
     CPUClass *cc = CPU_CLASS(oc);
     XtensaCPUClass *xcc = XTENSA_CPU_CLASS(cc);
+    ResettableClass *rc = RESETTABLE_CLASS(oc);
 
     device_class_set_parent_realize(dc, xtensa_cpu_realizefn,
                                     &xcc->parent_realize);
 
-    device_class_set_parent_reset(dc, xtensa_cpu_reset, &xcc->parent_reset);
+    resettable_class_set_parent_phases(rc, NULL, xtensa_cpu_reset_hold, NULL,
+                                       &xcc->parent_phases);
 
     cc->class_by_name = xtensa_cpu_class_by_name;
     cc->has_work = xtensa_cpu_has_work;