[PATCH 17/18] target/mips: Make MIPS_CPU common to new MIPS32_CPU / MIPS64_CPU types

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

"target/foo/cpu-qom.h" can not use any target specific definitions.

Currently "target/mips/cpu-qom.h" defines TYPE_MIPS_CPU depending
on the mips(32)/mips64 build type. This doesn't scale in a
heterogeneous context where we need to access both types concurrently.

In order to do that, introduce the new MIPS32_CPU / MIPS64_CPU types,
both inheriting a common TYPE_MIPS_CPU base type.

Keep the current CPU types registered in mips_register_cpudef_type()
as 32 or 64-bit, but instead of depending on the binary built being
targeting 32/64-bit, check whether the CPU is 64-bit by looking at
the CPU_MIPS64 bit.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 target/mips/cpu-qom.h | 13 ++++++-------
 target/mips/cpu.h     |  3 +++
 target/mips/cpu.c     | 11 ++++++++++-
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/target/mips/cpu-qom.h b/target/mips/cpu-qom.h
index 9c98ca1956..1a71509b5e 100644
--- a/target/mips/cpu-qom.h
+++ b/target/mips/cpu-qom.h
@@ -1,5 +1,5 @@
 /*
- * QEMU MIPS CPU
+ * QEMU MIPS CPU QOM header (target agnostic)
  *
  * Copyright (c) 2012 SUSE LINUX Products GmbH
  *
@@ -23,13 +23,12 @@
 #include "hw/core/cpu.h"
 #include "qom/object.h"
 
-#ifdef TARGET_MIPS64
-#define TYPE_MIPS_CPU "mips64-cpu"
-#else
-#define TYPE_MIPS_CPU "mips-cpu"
-#endif
+#define TYPE_MIPS_CPU   "mips-cpu"
+#define TYPE_MIPS32_CPU "mips32-cpu"
+#define TYPE_MIPS64_CPU "mips64-cpu"
 
-OBJECT_DECLARE_CPU_TYPE(MIPSCPU, MIPSCPUClass, MIPS_CPU)
+OBJECT_DECLARE_CPU_TYPE(MIPS32CPU, MIPSCPUClass, MIPS32_CPU)
+OBJECT_DECLARE_CPU_TYPE(MIPS64CPU, MIPSCPUClass, MIPS64_CPU)
 
 #define MIPS_CPU_TYPE_SUFFIX "-" TYPE_MIPS_CPU
 #define MIPS_CPU_TYPE_NAME(model) model MIPS_CPU_TYPE_SUFFIX
diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index 6b026e6bcf..3b6d0a7a8a 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -10,6 +10,9 @@
 #include "hw/clock.h"
 #include "mips-defs.h"
 
+/* Abstract QOM MIPS CPU, not exposed to other targets */
+OBJECT_DECLARE_CPU_TYPE(MIPSCPU, MIPSCPUClass, MIPS_CPU)
+
 #define TCG_GUEST_DEFAULT_MO (0)
 
 typedef struct CPUMIPSTLBContext CPUMIPSTLBContext;
diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index 83ee54f766..f43300dd5e 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -605,6 +605,14 @@ static const TypeInfo mips_cpu_types[] = {
         .abstract       = true,
         .class_size     = sizeof(MIPSCPUClass),
         .class_init     = mips_cpu_class_init,
+    }, {
+        .name           = TYPE_MIPS32_CPU,
+        .parent         = TYPE_MIPS_CPU,
+        .abstract       = true,
+    }, {
+        .name           = TYPE_MIPS64_CPU,
+        .parent         = TYPE_MIPS_CPU,
+        .abstract       = true,
     }
 };
 
@@ -621,7 +629,8 @@ static void mips_register_cpudef_type(const struct mips_def_t *def)
     char *typename = mips_cpu_type_name(def->name);
     TypeInfo ti = {
         .name = typename,
-        .parent = TYPE_MIPS_CPU,
+        .parent = def->insn_flags & CPU_MIPS64
+                  ? TYPE_MIPS64_CPU : TYPE_MIPS32_CPU,
         .class_init = mips_cpu_cpudef_class_init,
         .class_data = (void *)def,
     };
-- 
2.41.0