target/loongarch: Extract 64-bit specifics to loongarch64_cpu_class_init

Extract loongarch64 specific code from loongarch_cpu_class_init()
to a new loongarch64_cpu_class_init().

In preparation of supporting loongarch32 cores, rename these
functions using the '64' suffix.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230821125959.28666-6-philmd@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>

target/loongarch/cpu.c

@@ -695,11 +695,6 @@ static const struct SysemuCPUOps loongarch_sysemu_ops = {
 };
 #endif
 
-static gchar *loongarch_gdb_arch_name(CPUState *cs)
-{
-    return g_strdup("loongarch64");
-}
-
 static void loongarch_cpu_class_init(ObjectClass *c, void *data)
 {
     LoongArchCPUClass *lacc = LOONGARCH_CPU_CLASS(c);
@@ -724,16 +719,27 @@ static void loongarch_cpu_class_init(ObjectClass *c, void *data)
     cc->disas_set_info = loongarch_cpu_disas_set_info;
     cc->gdb_read_register = loongarch_cpu_gdb_read_register;
     cc->gdb_write_register = loongarch_cpu_gdb_write_register;
-    cc->gdb_num_core_regs = 35;
-    cc->gdb_core_xml_file = "loongarch-base64.xml";
     cc->gdb_stop_before_watchpoint = true;
-    cc->gdb_arch_name = loongarch_gdb_arch_name;
 
 #ifdef CONFIG_TCG
     cc->tcg_ops = &loongarch_tcg_ops;
 #endif
 }
 
+static gchar *loongarch64_gdb_arch_name(CPUState *cs)
+{
+    return g_strdup("loongarch64");
+}
+
+static void loongarch64_cpu_class_init(ObjectClass *c, void *data)
+{
+    CPUClass *cc = CPU_CLASS(c);
+
+    cc->gdb_num_core_regs = 35;
+    cc->gdb_core_xml_file = "loongarch-base64.xml";
+    cc->gdb_arch_name = loongarch64_gdb_arch_name;
+}
+
 #define DEFINE_LOONGARCH_CPU_TYPE(size, model, initfn) \
     { \
         .parent = TYPE_LOONGARCH##size##_CPU, \
@@ -757,6 +763,7 @@ static const TypeInfo loongarch_cpu_type_infos[] = {
         .parent = TYPE_LOONGARCH_CPU,
 
         .abstract = true,
+        .class_init = loongarch64_cpu_class_init,
     },
     DEFINE_LOONGARCH_CPU_TYPE(64, "la464", loongarch_la464_initfn),
 };