[Qemu-devel] [PATCH 2/3] target-arm: Minimalistic CPU QOM'ification

[Peter Maydell <peter.maydell@linaro.org>]

From: Andreas Färber <afaerber@suse.de>

Introduce only one non-abstract type TYPE_ARM_CPU and do not touch
cp15 registers to not interfere with Peter's ongoing remodelling.
Embed CPUARMState as first (additional) field of ARMCPU.

Let CPUClass::reset() call cpu_state_reset() for now.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 Makefile.target      |    1 +
 target-arm/cpu-qom.h |   71 ++++++++++++++++++++++++++++++++++++++++++++++++++
 target-arm/cpu.c     |   60 ++++++++++++++++++++++++++++++++++++++++++
 target-arm/cpu.h     |    1 +
 target-arm/helper.c  |    8 +++++-
 5 files changed, 140 insertions(+), 1 deletions(-)
 create mode 100644 target-arm/cpu-qom.h
 create mode 100644 target-arm/cpu.c

diff --git a/Makefile.target b/Makefile.target
index 44b2e83..6e8b997 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -92,6 +92,7 @@ endif
 libobj-$(TARGET_SPARC64) += vis_helper.o
 libobj-$(CONFIG_NEED_MMU) += mmu.o
 libobj-$(TARGET_ARM) += neon_helper.o iwmmxt_helper.o
+libobj-$(TARGET_ARM) += cpu.o
 ifeq ($(TARGET_BASE_ARCH), sparc)
 libobj-y += fop_helper.o cc_helper.o win_helper.o mmu_helper.o ldst_helper.o
 libobj-y += cpu_init.o
diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
new file mode 100644
index 0000000..42d2a6b
--- /dev/null
+++ b/target-arm/cpu-qom.h
@@ -0,0 +1,71 @@
+/*
+ * QEMU ARM CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see
+ * <http://www.gnu.org/licenses/gpl-2.0.html>
+ */
+#ifndef QEMU_ARM_CPU_QOM_H
+#define QEMU_ARM_CPU_QOM_H
+
+#include "qemu/cpu.h"
+#include "cpu.h"
+
+#define TYPE_ARM_CPU "arm-cpu"
+
+#define ARM_CPU_CLASS(klass) \
+    OBJECT_CLASS_CHECK(ARMCPUClass, (klass), TYPE_ARM_CPU)
+#define ARM_CPU(obj) \
+    OBJECT_CHECK(ARMCPU, (obj), TYPE_ARM_CPU)
+#define ARM_CPU_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(ARMCPUClass, (obj), TYPE_ARM_CPU)
+
+/**
+ * ARMCPUClass:
+ * @parent_reset: The parent class' reset handler.
+ *
+ * An ARM CPU model.
+ */
+typedef struct ARMCPUClass {
+    /*< private >*/
+    CPUClass parent_class;
+    /*< public >*/
+
+    void (*parent_reset)(CPUState *cpu);
+} ARMCPUClass;
+
+/**
+ * ARMCPU:
+ * @env: #CPUARMState
+ *
+ * An ARM CPU core.
+ */
+typedef struct ARMCPU {
+    /*< private >*/
+    CPUState parent_obj;
+    /*< public >*/
+
+    CPUARMState env;
+} ARMCPU;
+
+static inline ARMCPU *arm_env_get_cpu(CPUARMState *env)
+{
+    return ARM_CPU(container_of(env, ARMCPU, env));
+}
+
+#define ENV_GET_CPU(e) CPU(arm_env_get_cpu(e))
+
+
+#endif
diff --git a/target-arm/cpu.c b/target-arm/cpu.c
new file mode 100644
index 0000000..c3ed45b
--- /dev/null
+++ b/target-arm/cpu.c
@@ -0,0 +1,60 @@
+/*
+ * QEMU ARM CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see
+ * <http://www.gnu.org/licenses/gpl-2.0.html>
+ */
+
+#include "cpu-qom.h"
+#include "qemu-common.h"
+
+/* CPUClass::reset() */
+static void arm_cpu_reset(CPUState *s)
+{
+    ARMCPU *cpu = ARM_CPU(s);
+    ARMCPUClass *acc = ARM_CPU_GET_CLASS(cpu);
+
+    acc->parent_reset(s);
+
+    /* TODO Inline the current contents of cpu_state_reset(),
+            once cpu_reset_model_id() is eliminated. */
+    cpu_state_reset(&cpu->env);
+}
+
+static void arm_cpu_class_init(ObjectClass *oc, void *data)
+{
+    ARMCPUClass *acc = ARM_CPU_CLASS(oc);
+    CPUClass *cc = CPU_CLASS(acc);
+
+    acc->parent_reset = cc->reset;
+    cc->reset = arm_cpu_reset;
+}
+
+static const TypeInfo arm_cpu_type_info = {
+    .name = TYPE_ARM_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(ARMCPU),
+    .abstract = false,
+    .class_size = sizeof(ARMCPUClass),
+    .class_init = arm_cpu_class_init,
+};
+
+static void arm_cpu_register_types(void)
+{
+    type_register_static(&arm_cpu_type_info);
+}
+
+type_init(arm_cpu_register_types)
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 69ef142..a68df61 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -475,6 +475,7 @@ static inline void cpu_clone_regs(CPUARMState *env, target_ulong newsp)
 #endif
 
 #include "cpu-all.h"
+#include "cpu-qom.h"
 
 /* Bit usage in the TB flags field: */
 #define ARM_TBFLAG_THUMB_SHIFT      0
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 1ce8105..dd8e306 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -278,6 +278,10 @@ static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
     }
 }
 
+/* TODO Move contents into arm_cpu_reset() in cpu.c,
+ *      once cpu_reset_model_id() is eliminated,
+ *      and then forward to cpu_reset() here.
+ */
 void cpu_state_reset(CPUARMState *env)
 {
     uint32_t id;
@@ -400,6 +404,7 @@ static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
 
 CPUARMState *cpu_arm_init(const char *cpu_model)
 {
+    ARMCPU *cpu;
     CPUARMState *env;
     uint32_t id;
     static int inited = 0;
@@ -407,7 +412,8 @@ CPUARMState *cpu_arm_init(const char *cpu_model)
     id = cpu_arm_find_by_name(cpu_model);
     if (id == 0)
         return NULL;
-    env = g_malloc0(sizeof(CPUARMState));
+    cpu = ARM_CPU(object_new(TYPE_ARM_CPU));
+    env = &cpu->env;
     cpu_exec_init(env);
     if (tcg_enabled() && !inited) {
         inited = 1;
-- 
1.7.1