[PATCH 3/8] hw/misc/pvpanic: Add the MMIO interface

[Mihai Carabas <mihai.carabas@oracle.com>]

From: Peng Hao <peng.hao2@zte.com.cn>

Add new pvpanic type: "TYPE_PVPANIC_MMIO".

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
---
 hw/misc/pvpanic.c         | 51 +++++++++++++++++++++++++++++++++++++++++++----
 include/hw/misc/pvpanic.h |  3 ++-
 2 files changed, 49 insertions(+), 5 deletions(-)

diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 2e085f4..136f1d6 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.
@@ -34,6 +36,10 @@ typedef struct PVPanicISAState PVPanicISAState;
 DECLARE_INSTANCE_CHECKER(PVPanicISAState, PVPANIC_ISA_DEVICE,
                          TYPE_PVPANIC_ISA)
 
+typedef struct PVPanicMMIOState PVPanicMMIOState;
+DECLARE_INSTANCE_CHECKER(PVPanicMMIOState, PVPANIC_MMIO_DEVICE,
+                         TYPE_PVPANIC_MMIO)
+
 static void handle_event(int event)
 {
     static bool logged;
@@ -67,21 +73,32 @@ struct PVPanicISAState {
     uint16_t ioport;
 };
 
+/* PVPanicMMIOState for sysbus device and
+ * use mmio.
+ */
+typedef struct PVPanicMMIOState {
+    SysBusDevice parent_obj;
+    /*<private>*/
+
+    /* public */
+    MemoryRegion mr;
+} PVPanicMMIOState;
+
 /* 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,
@@ -136,9 +153,35 @@ static TypeInfo pvpanic_isa_info = {
     .class_init    = pvpanic_isa_class_init,
 };
 
+static void pvpanic_mmio_initfn(Object *obj)
+{
+    PVPanicMMIOState *s = PVPANIC_MMIO_DEVICE(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 30e9f8f..ee645dc 100644
--- a/include/hw/misc/pvpanic.h
+++ b/include/hw/misc/pvpanic.h
@@ -18,12 +18,13 @@
 #include "qom/object.h"
 
 #define TYPE_PVPANIC_ISA "pvpanic"
+#define TYPE_PVPANIC_MMIO "pvpanic-mmio"
 
 #define PVPANIC_IOPORT_PROP "ioport"
 
 static inline uint16_t pvpanic_port(void)
 {
-    Object *o = object_resolve_path_type("", TYPE_PVPANIC, NULL);
+    Object *o = object_resolve_path_type("", TYPE_PVPANIC_ISA, NULL);
     if (!o) {
         return 0;
     }
-- 
1.8.3.1