[Qemu-devel] [RFC v4 1/5] hw/arm: add very initial support for Canon DIGIC SoC

[Antony Pavlov]

DIGIC is Canon Inc.'s name for a family of SoC
for digital cameras and camcorders.

There is no publicly available specification for
DIGIC chips. All information about DIGIC chip
internals is based on reverse engineering efforts
made by CHDK (http://chdk.wikia.com) and
Magic Lantern (http://www.magiclantern.fm) projects
contributors.

Signed-off-by: Antony Pavlov <address@hidden>
---
 default-configs/arm-softmmu.mak |  1 +
 hw/arm/Makefile.objs            |  2 +-
 hw/arm/digic.c                  | 70 +++++++++++++++++++++++++++++++++++++++++
 include/hw/arm/digic.h          | 23 ++++++++++++++
 4 files changed, 95 insertions(+), 1 deletion(-)
 create mode 100644 hw/arm/digic.c
 create mode 100644 include/hw/arm/digic.h

diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index ac0815d..0d1d783 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -63,6 +63,7 @@ CONFIG_FRAMEBUFFER=y
 CONFIG_XILINX_SPIPS=y
 
 CONFIG_A9SCU=y
+CONFIG_DIGIC=y
 CONFIG_MARVELL_88W8618=y
 CONFIG_OMAP=y
 CONFIG_TSC210X=y
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 3671b42..e140485 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -3,5 +3,5 @@ obj-y += integratorcp.o kzm.o mainstone.o musicpal.o nseries.o
 obj-y += omap_sx1.o palm.o realview.o spitz.o stellaris.o
 obj-y += tosa.o versatilepb.o vexpress.o xilinx_zynq.o z2.o
 
-obj-y += armv7m.o exynos4210.o pxa2xx.o pxa2xx_gpio.o pxa2xx_pic.o
+obj-y += armv7m.o digic.o exynos4210.o pxa2xx.o pxa2xx_gpio.o pxa2xx_pic.o
 obj-y += omap1.o omap2.o strongarm.o
diff --git a/hw/arm/digic.c b/hw/arm/digic.c
new file mode 100644
index 0000000..95a9fcd
--- /dev/null
+++ b/hw/arm/digic.c
@@ -0,0 +1,70 @@
+/*
+ * QEMU model of the Canon DIGIC SoC.
+ *
+ * Copyright (C) 2013 Antony Pavlov <address@hidden>
+ *
+ * This model is based on reverse engineering efforts
+ * made by CHDK (http://chdk.wikia.com) and
+ * Magic Lantern (http://www.magiclantern.fm) projects
+ * contributors.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "hw/sysbus.h"
+#include "target-arm/cpu-qom.h"
+#include "hw/arm/digic.h"
+
+static void digic_init(Object *obj)
+{
+    DigicState *s = DIGIC(obj);
+
+    object_initialize(&s->cpu, sizeof(s->cpu), "arm946-" TYPE_ARM_CPU);
+    object_property_add_child(obj, "cpu", OBJECT(&s->cpu), NULL);
+}
+
+static void digic_realize(DeviceState *dev, Error **errp)
+{
+    DigicState *s = DIGIC(dev);
+    Error *err = NULL;
+
+    object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
+    if (err != NULL) {
+        error_propagate(errp, err);
+        return;
+    }
+}
+
+static void digic_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = digic_realize;
+}
+
+static const TypeInfo digic_type_info = {
+    .name = TYPE_DIGIC,
+    .parent = TYPE_DEVICE,
+    .instance_size = sizeof(DigicState),
+    .instance_init = digic_init,
+    .class_init = digic_class_init,
+};
+
+static void digic_register_types(void)
+{
+    type_register_static(&digic_type_info);
+}
+
+type_init(digic_register_types)
diff --git a/include/hw/arm/digic.h b/include/hw/arm/digic.h
new file mode 100644
index 0000000..0ef4723
--- /dev/null
+++ b/include/hw/arm/digic.h
@@ -0,0 +1,23 @@
+/*
+ * Misc DIGIC declarations
+ *
+ * Copyright (C) 2013 Antony Pavlov <address@hidden>
+ *
+ */
+
+#ifndef __DIGIC_H__
+#define __DIGIC_H__
+
+#include "cpu-qom.h"
+
+#define TYPE_DIGIC "digic"
+
+#define DIGIC(obj) OBJECT_CHECK(DigicState, (obj), TYPE_DIGIC)
+
+typedef struct DigicState {
+    Object parent_obj;
+
+    ARMCPU cpu;
+} DigicState;
+
+#endif /* __DIGIC_H__ */
-- 
1.8.4.rc3