hw/misc/pvpanic-isa.c

   1 /*
   2  * QEMU simulated pvpanic device.
   3  *
   4  * Copyright Fujitsu, Corp. 2013
   5  *
   6  * Authors:
   7  *     Wen Congyang <wency@cn.fujitsu.com>
   8  *     Hu Tao <hutao@cn.fujitsu.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11  * See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "qemu/module.h"
  17 #include "sysemu/runstate.h"
  18
  19 #include "hw/nvram/fw_cfg.h"
  20 #include "hw/qdev-properties.h"
  21 #include "hw/misc/pvpanic.h"
  22 #include "qom/object.h"
  23 #include "hw/isa/isa.h"
  24 #include "standard-headers/linux/pvpanic.h"
  25
  26 OBJECT_DECLARE_SIMPLE_TYPE(PVPanicISAState, PVPANIC_ISA_DEVICE)
  27
  28 /*
  29  * PVPanicISAState for ISA device and
  30  * use ioport.
  31  */
  32 struct PVPanicISAState {
  33     ISADevice parent_obj;
  34
  35     uint16_t ioport;
  36     PVPanicState pvpanic;
  37 };
  38
  39 static void pvpanic_isa_initfn(Object *obj)
  40 {
  41     PVPanicISAState *s = PVPANIC_ISA_DEVICE(obj);
  42
  43     pvpanic_setup_io(&s->pvpanic, DEVICE(s), 1);
  44 }
  45
  46 static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
  47 {
  48     ISADevice *d = ISA_DEVICE(dev);
  49     PVPanicISAState *s = PVPANIC_ISA_DEVICE(dev);
  50     PVPanicState *ps = &s->pvpanic;
  51     FWCfgState *fw_cfg = fw_cfg_find();
  52     uint16_t *pvpanic_port;
  53
  54     if (!fw_cfg) {
  55         return;
  56     }
  57
  58     pvpanic_port = g_malloc(sizeof(*pvpanic_port));
  59     *pvpanic_port = cpu_to_le16(s->ioport);
  60     fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
  61                     sizeof(*pvpanic_port));
  62
  63     isa_register_ioport(d, &ps->mr, s->ioport);
  64 }
  65
  66 static Property pvpanic_isa_properties[] = {
  67     DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicISAState, ioport, 0x505),
  68     DEFINE_PROP_UINT8("events", PVPanicISAState, pvpanic.events,
  69                       PVPANIC_PANICKED | PVPANIC_CRASH_LOADED),
  70     DEFINE_PROP_END_OF_LIST(),
  71 };
  72
  73 static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
  74 {
  75     DeviceClass *dc = DEVICE_CLASS(klass);
  76
  77     dc->realize = pvpanic_isa_realizefn;
  78     device_class_set_props(dc, pvpanic_isa_properties);
  79     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  80 }
  81
  82 static const TypeInfo pvpanic_isa_info = {
  83     .name          = TYPE_PVPANIC_ISA_DEVICE,
  84     .parent        = TYPE_ISA_DEVICE,
  85     .instance_size = sizeof(PVPanicISAState),
  86     .instance_init = pvpanic_isa_initfn,
  87     .class_init    = pvpanic_isa_class_init,
  88 };
  89
  90 static void pvpanic_register_types(void)
  91 {
  92     type_register_static(&pvpanic_isa_info);
  93 }
  94
  95 type_init(pvpanic_register_types)