qdev: convert watchdogs

-watchdog NAME is now equivalent to -device NAME, except it treats
option argument '?' specially, and supports only one watchdog.

A side effect is that a device created with -watchdog may now receive
a different PCI address.

i6300esb is now available on any machine with a PCI bus, not just PCs.
ib700 is still PC only, but that could be changed easily.

The only remaining use of struct WatchdogTimerModel and
watchdog_add_model() is supporting '-watchdog ?'.  Should be replaced
by searching device_info_list for watchdog devices when we can
identify them there.

Also fixes ib700 not to use vm_clock before it is initialized: in
wdt_ib700_init(), called from register_watchdogs(), which runs before
init_timers().  The bug made ib700_write_enable_reg() crash in
qemu_del_timer().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 12 insertions, 6 deletions

diff --git a/hw/wdt_ib700.c b/hw/wdt_ib700.c
index 7b54bde..5fc3d83 100644
--- a/hw/wdt_ib700.c
+++ b/hw/wdt_ib700.c
@@ -88,11 +88,10 @@ static int ib700_load(QEMUFile *f, void *vp, int version)
     return 0;
 }
 
-/* Create and initialize a virtual IB700 during PC creation. */
-static void ib700_pc_init(PCIBus *unused)
+static void wdt_ib700_init(ISADevice *dev)
 {
+    timer = qemu_new_timer(vm_clock, ib700_timer_expired, NULL);
     register_savevm("ib700_wdt", -1, 0, ib700_save, ib700_load, NULL);
-
     register_ioport_write(0x441, 2, 1, ib700_write_disable_reg, NULL);
     register_ioport_write(0x443, 2, 1, ib700_write_enable_reg, NULL);
 }
@@ -100,11 +99,18 @@ static void ib700_pc_init(PCIBus *unused)
 static WatchdogTimerModel model = {
     .wdt_name = "ib700",
     .wdt_description = "iBASE 700",
-    .wdt_pc_init = ib700_pc_init,
 };
 
-void wdt_ib700_init(void)
+static ISADeviceInfo wdt_ib700_info = {
+    .qdev.name = "ib700",
+    .qdev.size = sizeof(ISADevice),
+    .init      = wdt_ib700_init,
+};
+
+static void wdt_ib700_register_devices(void)
 {
     watchdog_add_model(&model);
-    timer = qemu_new_timer(vm_clock, ib700_timer_expired, NULL);
+    isa_qdev_register(&wdt_ib700_info);
 }
+
+device_init(wdt_ib700_register_devices);