[PATCH-for-6.1 1/3] hw/sparc/sun4m: Introduce TYPE_SUN4M_MACHINE and Sun4mMachineClass

[Philippe Mathieu-Daudé]

All sun4m machines use a const sun4m_hwdef structure entry.
We want to have the common machine code to access this const
entry. The QOM way is to have it in the MachineClass.

Introduce the Sun4mMachineClass which expands MachineClass.
All sun4m machines inherit the TYPE_SUN4M_MACHINE.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/sparc/sun4m.c | 37 ++++++++++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 9 deletions(-)

diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index 1a00816d9a8..543a52a8fc8 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -107,6 +107,16 @@ struct sun4m_hwdef {
     uint8_t nvram_machine_id;
 };
 
+struct Sun4mMachineClass {
+    /*< private >*/
+    MachineClass parent_obj;
+    /*< public >*/
+};
+typedef struct Sun4mMachineClass Sun4mMachineClass;
+
+#define TYPE_SUN4M_MACHINE MACHINE_TYPE_NAME("sun4m-common")
+DECLARE_CLASS_CHECKERS(Sun4mMachineClass, SUN4M_MACHINE, TYPE_SUN4M_MACHINE)
+
 const char *fw_cfg_arch_key_name(uint16_t key)
 {
     static const struct {
@@ -1433,7 +1443,7 @@ static void ss5_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ss5_type = {
     .name = MACHINE_TYPE_NAME("SS-5"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = ss5_class_init,
 };
 
@@ -1453,7 +1463,7 @@ static void ss10_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ss10_type = {
     .name = MACHINE_TYPE_NAME("SS-10"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = ss10_class_init,
 };
 
@@ -1473,7 +1483,7 @@ static void ss600mp_class_init(ObjectClass *oc, void 
*data)
 
 static const TypeInfo ss600mp_type = {
     .name = MACHINE_TYPE_NAME("SS-600MP"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = ss600mp_class_init,
 };
 
@@ -1493,7 +1503,7 @@ static void ss20_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ss20_type = {
     .name = MACHINE_TYPE_NAME("SS-20"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = ss20_class_init,
 };
 
@@ -1512,7 +1522,7 @@ static void voyager_class_init(ObjectClass *oc, void 
*data)
 
 static const TypeInfo voyager_type = {
     .name = MACHINE_TYPE_NAME("Voyager"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = voyager_class_init,
 };
 
@@ -1531,7 +1541,7 @@ static void ss_lx_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ss_lx_type = {
     .name = MACHINE_TYPE_NAME("LX"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = ss_lx_class_init,
 };
 
@@ -1550,7 +1560,7 @@ static void ss4_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ss4_type = {
     .name = MACHINE_TYPE_NAME("SS-4"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = ss4_class_init,
 };
 
@@ -1569,7 +1579,7 @@ static void scls_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo scls_type = {
     .name = MACHINE_TYPE_NAME("SPARCClassic"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = scls_class_init,
 };
 
@@ -1588,12 +1598,21 @@ static void sbook_class_init(ObjectClass *oc, void 
*data)
 
 static const TypeInfo sbook_type = {
     .name = MACHINE_TYPE_NAME("SPARCbook"),
-    .parent = TYPE_MACHINE,
+    .parent = TYPE_SUN4M_MACHINE,
     .class_init = sbook_class_init,
 };
 
+static const TypeInfo sun4m_typeinfo = {
+    .name = TYPE_SUN4M_MACHINE,
+    .parent = TYPE_MACHINE,
+    .class_size     = sizeof(Sun4mMachineClass),
+    .abstract       = true,
+};
+
 static void sun4m_register_types(void)
 {
+    type_register_static(&sun4m_typeinfo);
+
     type_register_static(&idreg_info);
     type_register_static(&afx_info);
     type_register_static(&prom_info);
-- 
2.26.3