PPC: e500mc: add missing IVORs to bitmap
[qemu.git] / hw / ssi.c
1 /*
2 * QEMU Synchronous Serial Interface support
3 *
4 * Copyright (c) 2009 CodeSourcery.
5 * Written by Paul Brook
6 *
7 * This code is licensed under the GNU GPL v2.
8 *
9 * Contributions after 2012-01-13 are licensed under the terms of the
10 * GNU GPL, version 2 or (at your option) any later version.
11 */
12
13 #include "ssi.h"
14
15 struct SSIBus {
16 BusState qbus;
17 };
18
19 static struct BusInfo ssi_bus_info = {
20 .name = "SSI",
21 .size = sizeof(SSIBus),
22 };
23
24 static int ssi_slave_init(DeviceState *dev, DeviceInfo *base_info)
25 {
26 SSISlave *s = SSI_SLAVE(dev);
27 SSISlaveClass *ssc = SSI_SLAVE_GET_CLASS(s);
28 SSIBus *bus;
29
30 bus = FROM_QBUS(SSIBus, qdev_get_parent_bus(dev));
31 if (QTAILQ_FIRST(&bus->qbus.children) != dev
32 || QTAILQ_NEXT(dev, sibling) != NULL) {
33 hw_error("Too many devices on SSI bus");
34 }
35
36 return ssc->init(s);
37 }
38
39 void ssi_register_slave(DeviceInfo *info)
40 {
41 assert(info->size >= sizeof(SSISlave));
42 info->init = ssi_slave_init;
43 info->bus_info = &ssi_bus_info;
44 qdev_register(info);
45 }
46
47 DeviceState *ssi_create_slave(SSIBus *bus, const char *name)
48 {
49 DeviceState *dev;
50 dev = qdev_create(&bus->qbus, name);
51 qdev_init_nofail(dev);
52 return dev;
53 }
54
55 SSIBus *ssi_create_bus(DeviceState *parent, const char *name)
56 {
57 BusState *bus;
58 bus = qbus_create(&ssi_bus_info, parent, name);
59 return FROM_QBUS(SSIBus, bus);
60 }
61
62 uint32_t ssi_transfer(SSIBus *bus, uint32_t val)
63 {
64 DeviceState *dev;
65 SSISlave *slave;
66 SSISlaveClass *ssc;
67 dev = QTAILQ_FIRST(&bus->qbus.children);
68 if (!dev) {
69 return 0;
70 }
71 slave = SSI_SLAVE(dev);
72 ssc = SSI_SLAVE_GET_CLASS(slave);
73 return ssc->transfer(slave, val);
74 }