target/openrisc: Convert to 3-phase reset

Convert the openrisc 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>
Message-id: 20221124115023.2437291-13-peter.maydell@linaro.org

target/openrisc/cpu.c

@@ -70,13 +70,15 @@ static void openrisc_disas_set_info(CPUState *cpu, disassemble_info *info)
     info->print_insn = print_insn_or1k;
 }
 
-static void openrisc_cpu_reset(DeviceState *dev)
+static void openrisc_cpu_reset_hold(Object *obj)
 {
-    CPUState *s = CPU(dev);
+    CPUState *s = CPU(obj);
     OpenRISCCPU *cpu = OPENRISC_CPU(s);
     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
 
-    occ->parent_reset(dev);
+    if (occ->parent_phases.hold) {
+        occ->parent_phases.hold(obj);
+    }
 
     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields));
 
@@ -229,10 +231,12 @@ static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(occ);
     DeviceClass *dc = DEVICE_CLASS(oc);
+    ResettableClass *rc = RESETTABLE_CLASS(oc);
 
     device_class_set_parent_realize(dc, openrisc_cpu_realizefn,
                                     &occ->parent_realize);
-    device_class_set_parent_reset(dc, openrisc_cpu_reset, &occ->parent_reset);
+    resettable_class_set_parent_phases(rc, NULL, openrisc_cpu_reset_hold, NULL,
+                                       &occ->parent_phases);
 
     cc->class_by_name = openrisc_cpu_class_by_name;
     cc->has_work = openrisc_cpu_has_work;

target/openrisc/cpu.h

@@ -34,7 +34,7 @@ OBJECT_DECLARE_CPU_TYPE(OpenRISCCPU, OpenRISCCPUClass, OPENRISC_CPU)
 /**
  * OpenRISCCPUClass:
  * @parent_realize: The parent class' realize handler.
- * @parent_reset: The parent class' reset handler.
+ * @parent_phases: The parent class' reset phase handlers.
  *
  * A OpenRISC CPU model.
  */
@@ -44,7 +44,7 @@ struct OpenRISCCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    DeviceReset parent_reset;
+    ResettablePhases parent_phases;
 };
 
 #define TARGET_INSN_START_EXTRA_WORDS 1