[V6,3/6] hw/misc/pvpanic: Add the MMIO interface

diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index dd3aef2..5d0fbc6 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -2,10 +2,12 @@ 
  * QEMU simulated pvpanic device.
  *
  * Copyright Fujitsu, Corp. 2013
+ * Copyright (c) 2018 ZTE Ltd.
  *
  * Authors:
  *     Wen Congyang <wency@cn.fujitsu.com>
  *     Hu Tao <hutao@cn.fujitsu.com>
+ *     Peng Hao <peng.hao2@zte.com.cn>
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
@@ -25,9 +27,6 @@ 
 /* The pv event value */
 #define PVPANIC_PANICKED        (1 << PVPANIC_F_PANICKED)
 
-#define PVPANIC(obj)    \
-    OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC)
-
 static void handle_event(int event)
 {
     static bool logged;
@@ -45,30 +44,50 @@  static void handle_event(int event)
 
 #include "hw/isa/isa.h"
 
-typedef struct PVPanicState {
-    /* private */
-    ISADevice isadev;
+/* PVPanicISAState for ISA device and
+ * use ioport.
+ */
+typedef struct PVPanicISAState {
+     /* private */
+     ISADevice isadev;
+     uint16_t ioport;
 
     /* public */
     MemoryRegion mr;
-    uint16_t ioport;
-} PVPanicState;
+} PVPanicISAState;
+
+/* PVPanicMMIOState for sysbus device and
+ * use mmio.
+ */
+typedef struct PVPanicMMIOState {
+    /* private */
+    SysBusDevice busdev;
+
+     /* public */
+    MemoryRegion mr;
+} PVPanicMMIOState;
+
+#define PVPANIC_ISA(obj)    \
+    OBJECT_CHECK(PVPanicISAState, (obj), TYPE_PVPANIC)
+
+#define PVPANIC_MMIO(obj)    \
+    OBJECT_CHECK(PVPanicMMIOState, (obj), TYPE_PVPANIC_MMIO)
 
 /* return supported events on read */
-static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size)
+static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size)
 {
     return PVPANIC_PANICKED;
 }
 
-static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val,
+static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val,
                                  unsigned size)
 {
     handle_event(val);
 }
 
 static const MemoryRegionOps pvpanic_ops = {
-    .read = pvpanic_ioport_read,
-    .write = pvpanic_ioport_write,
+    .read = pvpanic_read,
+    .write = pvpanic_write,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 1,
@@ -77,15 +96,16 @@  static const MemoryRegionOps pvpanic_ops = {
 
 static void pvpanic_isa_initfn(Object *obj)
 {
-    PVPanicState *s = PVPANIC(obj);
+    PVPanicISAState *s = PVPANIC_ISA(obj);
 
-    memory_region_init_io(&s->mr, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1);
+    memory_region_init_io(&s->mr, OBJECT(s), &pvpanic_ops, s,
+                          TYPE_PVPANIC, 1);
 }
 
 static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
 {
     ISADevice *d = ISA_DEVICE(dev);
-    PVPanicState *s = PVPANIC(dev);
+    PVPanicISAState *s = PVPANIC_ISA(dev);
     FWCfgState *fw_cfg = fw_cfg_find();
     uint16_t *pvpanic_port;
 
@@ -102,7 +122,7 @@  static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
 }
 
 static Property pvpanic_isa_properties[] = {
-    DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
+    DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicISAState, ioport, 0x505),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -118,14 +138,41 @@  static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
 static TypeInfo pvpanic_isa_info = {
     .name          = TYPE_PVPANIC,
     .parent        = TYPE_ISA_DEVICE,
-    .instance_size = sizeof(PVPanicState),
+    .instance_size = sizeof(PVPanicISAState),
     .instance_init = pvpanic_isa_initfn,
     .class_init    = pvpanic_isa_class_init,
 };
 
+
+static void pvpanic_mmio_initfn(Object *obj)
+{
+    PVPanicMMIOState *s = PVPANIC_MMIO(obj);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+
+    memory_region_init_io(&s->mr, OBJECT(s), &pvpanic_ops, s,
+                          TYPE_PVPANIC_MMIO, 2);
+    sysbus_init_mmio(sbd, &s->mr);
+}
+
+static void pvpanic_mmio_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+}
+
+static TypeInfo pvpanic_mmio_info = {
+    .name          = TYPE_PVPANIC_MMIO,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(PVPanicMMIOState),
+    .instance_init = pvpanic_mmio_initfn,
+    .class_init    = pvpanic_mmio_class_init,
+};
+
 static void pvpanic_register_types(void)
 {
     type_register_static(&pvpanic_isa_info);
+    type_register_static(&pvpanic_mmio_info);
 }
 
 type_init(pvpanic_register_types)
diff --git a/include/hw/misc/pvpanic.h b/include/hw/misc/pvpanic.h
index 1ee071a..19c0fbb 100644
--- a/include/hw/misc/pvpanic.h
+++ b/include/hw/misc/pvpanic.h
@@ -17,6 +17,7 @@ 
 #define TYPE_PVPANIC "pvpanic"
 
 #define PVPANIC_IOPORT_PROP "ioport"
+#define TYPE_PVPANIC_MMIO "pvpanic-mmio"
 
 static inline uint16_t pvpanic_port(void)
 {