Implement the bus structure for PAPR virtual IO

This extends the "pseries" (PAPR) machine to include a virtual IO bus
supporting the PAPR defined hypercall based virtual IO mechanisms.

So far only one VIO device is provided, the vty / vterm, providing
a full console (polled only, for now).

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 50 insertions, 0 deletions

diff --git a/hw/spapr_vio.h b/hw/spapr_vio.h
new file mode 100644
index 0000000..b164ad3
--- /dev/null
+++ b/hw/spapr_vio.h
@@ -0,0 +1,50 @@
+#ifndef _HW_SPAPR_VIO_H
+#define _HW_SPAPR_VIO_H
+/*
+ * QEMU sPAPR VIO bus definitions
+ *
+ * Copyright (c) 2010 David Gibson, IBM Corporation <david@gibson.dropbear.id.au>
+ * Based on the s390 virtio bus definitions:
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ *
+ * 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/>.
+ */
+
+typedef struct VIOsPAPRDevice {
+    DeviceState qdev;
+    uint32_t reg;
+} VIOsPAPRDevice;
+
+typedef struct VIOsPAPRBus {
+    BusState bus;
+} VIOsPAPRBus;
+
+typedef struct {
+    DeviceInfo qdev;
+    const char *dt_name, *dt_type, *dt_compatible;
+    int (*init)(VIOsPAPRDevice *dev);
+    void (*hcalls)(VIOsPAPRBus *bus);
+    int (*devnode)(VIOsPAPRDevice *dev, void *fdt, int node_off);
+} VIOsPAPRDeviceInfo;
+
+extern VIOsPAPRBus *spapr_vio_bus_init(void);
+extern VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg);
+extern void spapr_vio_bus_register_withprop(VIOsPAPRDeviceInfo *info);
+extern int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt);
+
+void vty_putchars(VIOsPAPRDevice *sdev, uint8_t *buf, int len);
+void spapr_vty_create(VIOsPAPRBus *bus,
+                      uint32_t reg, CharDriverState *chardev);
+
+#endif /* _HW_SPAPR_VIO_H */