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authorPaul Brook <paul@codesourcery.com>2009-05-23 00:05:19 +0100
committerPaul Brook <paul@codesourcery.com>2009-05-23 00:13:41 +0100
commit02e2da45c4601909d5105838323d5c529ec7010b (patch)
treee9b1099baa55c3f8084110feb28f57ede8d2de3a /hw/ssi.c
parent4856fcff8af1ba349baaf063af00f5e5d87a99f4 (diff)
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Add common BusState
Implement and use a common device bus state. The main side-effect is that creating a bus and attaching it to a parent device are no longer separate operations. For legacy code we allow a NULL parent, but that should go away eventually. Also tweak creation code to veriry theat a device in on the right bus. Signed-off-by: Paul Brook <paul@codesourcery.com>
Diffstat (limited to 'hw/ssi.c')
-rw-r--r--hw/ssi.c35
1 files changed, 24 insertions, 11 deletions
diff --git a/hw/ssi.c b/hw/ssi.c
index 9dfdbe9..52b7b7c 100644
--- a/hw/ssi.c
+++ b/hw/ssi.c
@@ -10,16 +10,21 @@
#include "ssi.h"
struct SSIBus {
- SSISlave *slave;
+ BusState qbus;
};
-static void ssi_slave_init(DeviceState *dev, void *opaque)
+static void ssi_slave_init(DeviceState *dev, DeviceInfo *base_info)
{
- SSISlaveInfo *info = opaque;
+ SSISlaveInfo *info = container_of(base_info, SSISlaveInfo, qdev);
SSISlave *s = SSI_SLAVE_FROM_QDEV(dev);
- SSIBus *bus = qdev_get_bus(dev);
+ SSIBus *bus;
+
+ bus = FROM_QBUS(SSIBus, qdev_get_parent_bus(dev));
+ if (LIST_FIRST(&bus->qbus.children) != dev
+ || LIST_NEXT(dev, sibling) != NULL) {
+ hw_error("Too many devices on SSI bus");
+ }
- bus->slave = s;
s->info = info;
info->init(s);
}
@@ -27,26 +32,34 @@ static void ssi_slave_init(DeviceState *dev, void *opaque)
void ssi_register_slave(const char *name, int size, SSISlaveInfo *info)
{
assert(size >= sizeof(SSISlave));
- qdev_register(name, size, ssi_slave_init, info);
+ info->qdev.init = ssi_slave_init;
+ info->qdev.bus_type = BUS_TYPE_SSI;
+ qdev_register(name, size, &info->qdev);
}
DeviceState *ssi_create_slave(SSIBus *bus, const char *name)
{
DeviceState *dev;
- dev = qdev_create(bus, name);
+ dev = qdev_create(&bus->qbus, name);
qdev_init(dev);
return dev;
}
-SSIBus *ssi_create_bus(void)
+SSIBus *ssi_create_bus(DeviceState *parent, const char *name)
{
- return qemu_mallocz(sizeof(SSIBus));
+ BusState *bus;
+ bus = qbus_create(BUS_TYPE_SSI, sizeof(SSIBus), parent, name);
+ return FROM_QBUS(SSIBus, bus);
}
uint32_t ssi_transfer(SSIBus *bus, uint32_t val)
{
- if (!bus->slave) {
+ DeviceState *dev;
+ SSISlave *slave;
+ dev = LIST_FIRST(&bus->qbus.children);
+ if (!dev) {
return 0;
}
- return bus->slave->info->transfer(bus->slave, val);
+ slave = SSI_SLAVE_FROM_QDEV(dev);
+ return slave->info->transfer(slave, val);
}