@@ -57,3 +57,4 @@ obj-$(CONFIG_EDU) += edu.o
obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o
obj-$(CONFIG_AUX) += auxbus.o
obj-$(CONFIG_ASPEED_SOC) += aspeed_scu.o aspeed_sdmc.o
+obj-y += mmio_interface.o
new file mode 100644
@@ -0,0 +1,128 @@
+/*
+ * mmio_interface.c
+ *
+ * Copyright (C) 2017 : GreenSocs
+ * http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ * Developed by :
+ * Frederic Konrad <fred.konrad@greensocs.com>
+ *
+ * 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/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "hw/qdev-properties.h"
+#include "hw/misc/mmio_interface.h"
+#include "qapi/error.h"
+
+#ifndef DEBUG_MMIO_INTERFACE
+#define DEBUG_MMIO_INTERFACE 0
+#endif
+
+static uint64_t mmio_interface_counter;
+
+#define DPRINTF(fmt, ...) do { \
+ if (DEBUG_MMIO_INTERFACE) { \
+ qemu_log("mmio_interface: 0x%" PRIX64 ": " fmt, s->id, ## __VA_ARGS__);\
+ } \
+} while (0);
+
+static void mmio_interface_init(Object *obj)
+{
+ MMIOInterface *s = MMIO_INTERFACE(obj);
+
+ if (DEBUG_MMIO_INTERFACE) {
+ s->id = mmio_interface_counter++;
+ }
+
+ DPRINTF("interface created\n");
+ s->host_ptr = 0;
+ s->subregion = 0;
+}
+
+static void mmio_interface_realize(DeviceState *dev, Error **errp)
+{
+ MMIOInterface *s = MMIO_INTERFACE(dev);
+
+ DPRINTF("realize from 0x%" PRIX64 " to 0x%" PRIX64 " map host pointer"
+ " %p\n", s->start, s->end, s->host_ptr);
+
+ if (!s->host_ptr) {
+ error_setg(errp, "host_ptr property must be set");
+ }
+
+ if (!s->subregion) {
+ error_setg(errp, "subregion property must be set");
+ }
+
+ memory_region_init_ram_ptr(&s->ram_mem, OBJECT(s), "ram",
+ s->end - s->start + 1, s->host_ptr);
+ memory_region_set_readonly(&s->ram_mem, s->ro);
+ memory_region_add_subregion(s->subregion, s->start, &s->ram_mem);
+}
+
+static void mmio_interface_unrealize(DeviceState *dev, Error **errp)
+{
+ MMIOInterface *s = MMIO_INTERFACE(dev);
+
+ DPRINTF("unrealize from 0x%" PRIX64 " to 0x%" PRIX64 " map host pointer"
+ " %p\n", s->start, s->end, s->host_ptr);
+ memory_region_del_subregion(s->subregion, &s->ram_mem);
+}
+
+static void mmio_interface_finalize(Object *obj)
+{
+ MMIOInterface *s = MMIO_INTERFACE(obj);
+
+ DPRINTF("finalize from 0x%" PRIX64 " to 0x%" PRIX64 " map host pointer"
+ " %p\n", s->start, s->end, s->host_ptr);
+ object_unparent(OBJECT(&s->ram_mem));
+}
+
+static Property mmio_interface_properties[] = {
+ DEFINE_PROP_UINT64("start", MMIOInterface, start, 0),
+ DEFINE_PROP_UINT64("end", MMIOInterface, end, 0),
+ DEFINE_PROP_PTR("host_ptr", MMIOInterface, host_ptr),
+ DEFINE_PROP_BOOL("ro", MMIOInterface, ro, false),
+ DEFINE_PROP_MEMORY_REGION("subregion", MMIOInterface, subregion),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void mmio_interface_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->realize = mmio_interface_realize;
+ dc->unrealize = mmio_interface_unrealize;
+ dc->props = mmio_interface_properties;
+}
+
+static const TypeInfo mmio_interface_info = {
+ .name = TYPE_MMIO_INTERFACE,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(MMIOInterface),
+ .instance_init = mmio_interface_init,
+ .instance_finalize = mmio_interface_finalize,
+ .class_init = mmio_interface_class_init,
+};
+
+static void mmio_interface_register_types(void)
+{
+ type_register_static(&mmio_interface_info);
+}
+
+type_init(mmio_interface_register_types)
new file mode 100644
@@ -0,0 +1,49 @@
+/*
+ * mmio_interface.h
+ *
+ * Copyright (C) 2017 : GreenSocs
+ * http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ * Developed by :
+ * Frederic Konrad <fred.konrad@greensocs.com>
+ *
+ * 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/>.
+ *
+ */
+
+#ifndef MMIO_INTERFACE_H
+#define MMIO_INTERFACE_H
+
+#include "exec/memory.h"
+
+#define TYPE_MMIO_INTERFACE "mmio_interface"
+#define MMIO_INTERFACE(obj) OBJECT_CHECK(MMIOInterface, (obj), \
+ TYPE_MMIO_INTERFACE)
+
+typedef struct MMIOInterface {
+ DeviceState parent_obj;
+
+ MemoryRegion *subregion;
+ MemoryRegion ram_mem;
+ uint64_t start;
+ uint64_t end;
+ bool ro;
+ uint64_t id;
+ void *host_ptr;
+} MMIOInterface;
+
+void mmio_interface_map(MMIOInterface *s);
+void mmio_interface_unmap(MMIOInterface *s);
+
+#endif /* MMIO_INTERFACE_H */