Add minimal code needed to allow upstream Linux guest to boot.
Cc: Peter Maydell <peter.mayd...@linaro.org>
Cc: Jason Wang <jasow...@redhat.com>
Cc: Philippe Mathieu-Daudé <f4...@amsat.org>
Cc: qemu-devel@nongnu.org
Cc: qemu-...@nongnu.org
Cc: yurov...@gmail.com
Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
---
hw/misc/Makefile.objs | 1 +
hw/misc/imx_flexcan.c | 99 +++++++++++++++++++++++++++++++++++++++++++
include/hw/misc/imx_flexcan.h | 22 ++++++++++
3 files changed, 122 insertions(+)
create mode 100644 hw/misc/imx_flexcan.c
create mode 100644 include/hw/misc/imx_flexcan.h
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 492c535330..943b22af40 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -38,6 +38,7 @@ obj-$(CONFIG_IMX) += imx7_ccm.o
obj-$(CONFIG_IMX) += imx2_wdt.o
obj-$(CONFIG_IMX) += imx7_snvs.o
obj-$(CONFIG_IMX) += imx7_iomuxc.o
+obj-$(CONFIG_IMX) += imx_flexcan.o
obj-$(CONFIG_MILKYMIST) += milkymist-hpdmc.o
obj-$(CONFIG_MILKYMIST) += milkymist-pfpu.o
obj-$(CONFIG_MAINSTONE) += mst_fpga.o
diff --git a/hw/misc/imx_flexcan.c b/hw/misc/imx_flexcan.c
new file mode 100644
index 0000000000..dd4d3d6dc1
--- /dev/null
+++ b/hw/misc/imx_flexcan.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2017, Impinj, Inc.
+ *
+ * i.MX FlexCAN block emulation code
+ *
+ * Author: Andrey Smirnov <andrew.smir...@gmail.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/misc/imx_flexcan.h"
+#include "qemu/log.h"
+
+static void imx_flexcan_reset(DeviceState *dev)
+{
+ IMXFlexCANState *s = IMX_FLEXCAN(dev);
+
+ memset(s->regs, 0, sizeof(s->regs));
+}
+
+static uint64_t imx_flexcan_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ IMXFlexCANState *s = opaque;
+ return s->regs[offset / sizeof(uint32_t)];
+}
+
+static void imx_flexcan_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+ IMXFlexCANState *s = opaque;
+ s->regs[offset / sizeof(uint32_t)] = value;
+}
+
+static const struct MemoryRegionOps imx_flexcan_ops = {
+ .read = imx_flexcan_read,
+ .write = imx_flexcan_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .impl = {
+ /*
+ * Our device would not work correctly if the guest was doing
+ * unaligned access. This might not be a limitation on the real
+ * device but in practice there is no reason for a guest to access
+ * this device unaligned.
+ */
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+static void imx_flexcan_init(Object *obj)
+{
+ SysBusDevice *sd = SYS_BUS_DEVICE(obj);
+ IMXFlexCANState *s = IMX_FLEXCAN(obj);
+
+ memory_region_init_io(&s->iomem,
+ obj,
+ &imx_flexcan_ops,
+ s,
+ TYPE_IMX_FLEXCAN ".iomem",
+ sizeof(s->regs));
+ sysbus_init_mmio(sd, &s->iomem);
+}
+
+static const VMStateDescription vmstate_imx_flexcan = {
+ .name = TYPE_IMX_FLEXCAN,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(regs, IMXFlexCANState, FLEXCAN_NUM),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static void imx_flexcan_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->reset = imx_flexcan_reset;
+ dc->vmsd = &vmstate_imx_flexcan;
+ dc->desc = "i.MX FlexCAN Module";
+}
+
+static const TypeInfo imx_flexcan_info = {
+ .name = TYPE_IMX_FLEXCAN,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(IMXFlexCANState),
+ .instance_init = imx_flexcan_init,
+ .class_init = imx_flexcan_class_init,
+};
+
+static void imx_flexcan_register_type(void)
+{
+ type_register_static(&imx_flexcan_info);
+}
+type_init(imx_flexcan_register_type)
diff --git a/include/hw/misc/imx_flexcan.h b/include/hw/misc/imx_flexcan.h
new file mode 100644
index 0000000000..da9980cf86
--- /dev/null
+++ b/include/hw/misc/imx_flexcan.h
@@ -0,0 +1,22 @@
+#ifndef IMX_FLEXCAN_H
+#define IMX_FLEXCAN_H
+
+#include "hw/sysbus.h"
+
+enum IMXFlexCANRegisters {
+ FLEXCAN_NUM = 0x9E0 / sizeof(uint32_t) + 1,
+};
+
+typedef struct IMXFlexCANState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion iomem;
+ uint32_t regs[FLEXCAN_NUM];
+} IMXFlexCANState;
+
+#define TYPE_IMX_FLEXCAN "imx-flexcan"
+#define IMX_FLEXCAN(obj) OBJECT_CHECK(IMXFlexCANState, (obj), TYPE_IMX_FLEXCAN)
+
+#endif /* IMX_FLEXCAN_H */
--
2.13.5
