diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 35d6797..e2cb4a5 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -22,18 +22,6 @@
 #include "hw/misc/pvpanic.h"
 #include "qom/object.h"
 
-/* The bit of supported pv event, TODO: include uapi header and remove this */
-#define PVPANIC_F_PANICKED      0
-#define PVPANIC_F_CRASHLOADED   1
-
-/* The pv event value */
-#define PVPANIC_PANICKED        (1 << PVPANIC_F_PANICKED)
-#define PVPANIC_CRASHLOADED     (1 << PVPANIC_F_CRASHLOADED)
-
-typedef struct PVPanicState PVPanicState;
-DECLARE_INSTANCE_CHECKER(PVPanicState, ISA_PVPANIC_DEVICE,
-                         TYPE_PVPANIC)
-
 static void handle_event(int event)
 {
     static bool logged;
@@ -54,90 +42,29 @@
     }
 }
 
-#include "hw/isa/isa.h"
-
-struct PVPanicState {
-    ISADevice parent_obj;
-
-    MemoryRegion io;
-    uint16_t ioport;
-    uint8_t events;
-};
-
 /* return supported events on read */
-static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size)
+static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size)
 {
     PVPanicState *pvp = opaque;
     return pvp->events;
 }
 
-static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val,
+static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val,
                                  unsigned size)
 {
     handle_event(val);
 }
 
 static const MemoryRegionOps pvpanic_ops = {
-    .read = pvpanic_ioport_read,
-    .write = pvpanic_ioport_write,
+    .read = pvpanic_read,
+    .write = pvpanic_write,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };
 
-static void pvpanic_isa_initfn(Object *obj)
+void pvpanic_setup_io(PVPanicState *s, DeviceState *dev, unsigned size)
 {
-    PVPanicState *s = ISA_PVPANIC_DEVICE(obj);
-
-    memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1);
+    memory_region_init_io(&s->mr, OBJECT(dev), &pvpanic_ops, s, "pvpanic", size);
 }
-
-static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
-{
-    ISADevice *d = ISA_DEVICE(dev);
-    PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
-    FWCfgState *fw_cfg = fw_cfg_find();
-    uint16_t *pvpanic_port;
-
-    if (!fw_cfg) {
-        return;
-    }
-
-    pvpanic_port = g_malloc(sizeof(*pvpanic_port));
-    *pvpanic_port = cpu_to_le16(s->ioport);
-    fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
-                    sizeof(*pvpanic_port));
-
-    isa_register_ioport(d, &s->io, s->ioport);
-}
-
-static Property pvpanic_isa_properties[] = {
-    DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
-    DEFINE_PROP_UINT8("events", PVPanicState, events, PVPANIC_PANICKED | PVPANIC_CRASHLOADED),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
-static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-
-    dc->realize = pvpanic_isa_realizefn;
-    device_class_set_props(dc, pvpanic_isa_properties);
-    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-}
-
-static TypeInfo pvpanic_isa_info = {
-    .name          = TYPE_PVPANIC,
-    .parent        = TYPE_ISA_DEVICE,
-    .instance_size = sizeof(PVPanicState),
-    .instance_init = pvpanic_isa_initfn,
-    .class_init    = pvpanic_isa_class_init,
-};
-
-static void pvpanic_register_types(void)
-{
-    type_register_static(&pvpanic_isa_info);
-}
-
-type_init(pvpanic_register_types)