[PATCH v3 05/17] hw/intc/loongson_ipi: Add TYPE_LOONGSON_IPI_COMMON stub

[Philippe Mathieu-Daudé]

From: Bibo Mao <maobibo@loongson.cn>

Introduce LOONGSON_IPI_COMMON stubs, QDev parent of LOONGSON_IPI.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
[PMD: Extracted from bigger commit, added commit description]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/intc/loongson_ipi.h        | 13 +++++++++++--
 include/hw/intc/loongson_ipi_common.h | 26 ++++++++++++++++++++++++++
 hw/intc/loongson_ipi.c                |  7 ++++---
 hw/intc/loongson_ipi_common.c         | 25 +++++++++++++++++++++++++
 hw/intc/Kconfig                       |  4 ++++
 hw/intc/meson.build                   |  1 +
 6 files changed, 71 insertions(+), 5 deletions(-)
 create mode 100644 include/hw/intc/loongson_ipi_common.h
 create mode 100644 hw/intc/loongson_ipi_common.c

diff --git a/include/hw/intc/loongson_ipi.h b/include/hw/intc/loongson_ipi.h
index efb772f384..82cb64ca40 100644
--- a/include/hw/intc/loongson_ipi.h
+++ b/include/hw/intc/loongson_ipi.h
@@ -8,6 +8,8 @@
 #ifndef HW_LOONGSON_IPI_H
 #define HW_LOONGSON_IPI_H
 
+#include "qom/object.h"
+#include "hw/intc/loongson_ipi_common.h"
 #include "hw/sysbus.h"
 
 /* Mainy used by iocsr read and write */
@@ -31,7 +33,7 @@
 #define IPI_MBX_NUM           4
 
 #define TYPE_LOONGSON_IPI "loongson_ipi"
-OBJECT_DECLARE_SIMPLE_TYPE(LoongsonIPIState, LOONGSON_IPI)
+OBJECT_DECLARE_TYPE(LoongsonIPIState, LoongsonIPIClass, LOONGSON_IPI)
 
 typedef struct IPICore {
     LoongsonIPIState *ipi;
@@ -45,8 +47,15 @@ typedef struct IPICore {
     qemu_irq irq;
 } IPICore;
 
+struct LoongsonIPIClass {
+    LoongsonIPICommonClass parent_class;
+
+    DeviceRealize parent_realize;
+};
+
 struct LoongsonIPIState {
-    SysBusDevice parent_obj;
+    LoongsonIPICommonState parent_obj;
+
     MemoryRegion ipi_iocsr_mem;
     MemoryRegion ipi64_iocsr_mem;
     uint32_t num_cpu;
diff --git a/include/hw/intc/loongson_ipi_common.h 
b/include/hw/intc/loongson_ipi_common.h
new file mode 100644
index 0000000000..70ac69d0ba
--- /dev/null
+++ b/include/hw/intc/loongson_ipi_common.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson ipi interrupt header files
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef HW_LOONGSON_IPI_COMMON_H
+#define HW_LOONGSON_IPI_COMMON_H
+
+#include "qom/object.h"
+#include "hw/sysbus.h"
+
+#define TYPE_LOONGSON_IPI_COMMON "loongson_ipi_common"
+OBJECT_DECLARE_TYPE(LoongsonIPICommonState,
+                    LoongsonIPICommonClass, LOONGSON_IPI_COMMON)
+
+struct LoongsonIPICommonState {
+    SysBusDevice parent_obj;
+};
+
+struct LoongsonIPICommonClass {
+    SysBusDeviceClass parent_class;
+};
+
+#endif
diff --git a/hw/intc/loongson_ipi.c b/hw/intc/loongson_ipi.c
index 40ac769aad..e8772f1b96 100644
--- a/hw/intc/loongson_ipi.c
+++ b/hw/intc/loongson_ipi.c
@@ -362,8 +362,10 @@ static Property ipi_properties[] = {
 static void loongson_ipi_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    LoongsonIPIClass *lic = LOONGSON_IPI_CLASS(klass);
 
-    dc->realize = loongson_ipi_realize;
+    device_class_set_parent_realize(dc, loongson_ipi_realize,
+                                    &lic->parent_realize);
     device_class_set_props(dc, ipi_properties);
     dc->vmsd = &vmstate_loongson_ipi;
 }
@@ -382,8 +384,7 @@ static void loongson_ipi_finalize(Object *obj)
 
 static const TypeInfo loongson_ipi_info = {
     .name          = TYPE_LOONGSON_IPI,
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(LoongsonIPIState),
+    .parent        = TYPE_LOONGSON_IPI_COMMON,
     .class_init    = loongson_ipi_class_init,
     .instance_finalize = loongson_ipi_finalize,
 };
diff --git a/hw/intc/loongson_ipi_common.c b/hw/intc/loongson_ipi_common.c
new file mode 100644
index 0000000000..7e3f74d08a
--- /dev/null
+++ b/hw/intc/loongson_ipi_common.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson ipi interrupt common support
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "hw/intc/loongson_ipi_common.h"
+
+static const TypeInfo loongson_ipi_common_info = {
+    .name           = TYPE_LOONGSON_IPI_COMMON,
+    .parent         = TYPE_SYS_BUS_DEVICE,
+    .instance_size  = sizeof(LoongsonIPICommonState),
+    .class_size     = sizeof(LoongsonIPICommonClass),
+    .abstract       = true,
+};
+
+static void loongson_ipi_common_register_types(void)
+{
+    type_register_static(&loongson_ipi_common_info);
+}
+
+type_init(loongson_ipi_common_register_types)
diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig
index 58b6d3a710..a2a0fdca85 100644
--- a/hw/intc/Kconfig
+++ b/hw/intc/Kconfig
@@ -87,8 +87,12 @@ config GOLDFISH_PIC
 config M68K_IRQC
     bool
 
+config LOONGSON_IPI_COMMON
+    bool
+
 config LOONGSON_IPI
     bool
+    select LOONGSON_IPI_COMMON
 
 config LOONGARCH_PCH_PIC
     bool
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index afd1aa51ee..a09a527207 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -69,6 +69,7 @@ specific_ss.add(when: 'CONFIG_XIVE', if_true: files('xive.c'))
 specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XIVE'],
                if_true: files('spapr_xive_kvm.c'))
 specific_ss.add(when: 'CONFIG_M68K_IRQC', if_true: files('m68k_irqc.c'))
+specific_ss.add(when: 'CONFIG_LOONGSON_IPI_COMMON', if_true: 
files('loongson_ipi_common.c'))
 specific_ss.add(when: 'CONFIG_LOONGSON_IPI', if_true: files('loongson_ipi.c'))
 specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_PIC', if_true: 
files('loongarch_pch_pic.c'))
 specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true: 
files('loongarch_pch_msi.c'))
-- 
2.41.0