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 "hw/acpi/acpi_aml_interface.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 void build_pvpanic_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
  67 {
  68     Aml *crs, *field, *method;
  69     PVPanicISAState *s = PVPANIC_ISA_DEVICE(adev);
  70     Aml *dev = aml_device("PEVT");
  71
  72     aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0001")));
  73
  74     crs = aml_resource_template();
  75     aml_append(crs,
  76         aml_io(AML_DECODE16, s->ioport, s->ioport, 1, 1)
  77     );
  78     aml_append(dev, aml_name_decl("_CRS", crs));
  79
  80     aml_append(dev, aml_operation_region("PEOR", AML_SYSTEM_IO,
  81                                           aml_int(s->ioport), 1));
  82     field = aml_field("PEOR", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
  83     aml_append(field, aml_named_field("PEPT", 8));
  84     aml_append(dev, field);
  85
  86     /* device present, functioning, decoding, shown in UI */
  87     aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
  88
  89     method = aml_method("RDPT", 0, AML_NOTSERIALIZED);
  90     aml_append(method, aml_store(aml_name("PEPT"), aml_local(0)));
  91     aml_append(method, aml_return(aml_local(0)));
  92     aml_append(dev, method);
  93
  94     method = aml_method("WRPT", 1, AML_NOTSERIALIZED);
  95     aml_append(method, aml_store(aml_arg(0), aml_name("PEPT")));
  96     aml_append(dev, method);
  97
  98     aml_append(scope, dev);
  99 }
 100
 101 static Property pvpanic_isa_properties[] = {
 102     DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicISAState, ioport, 0x505),
 103     DEFINE_PROP_UINT8("events", PVPanicISAState, pvpanic.events,
 104                       PVPANIC_EVENTS),
 105     DEFINE_PROP_END_OF_LIST(),
 106 };
 107
 108 static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
 109 {
 110     DeviceClass *dc = DEVICE_CLASS(klass);
 111     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
 112
 113     dc->realize = pvpanic_isa_realizefn;
 114     device_class_set_props(dc, pvpanic_isa_properties);
 115     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 116     adevc->build_dev_aml = build_pvpanic_isa_aml;
 117 }
 118
 119 static const TypeInfo pvpanic_isa_info = {
 120     .name          = TYPE_PVPANIC_ISA_DEVICE,
 121     .parent        = TYPE_ISA_DEVICE,
 122     .instance_size = sizeof(PVPanicISAState),
 123     .instance_init = pvpanic_isa_initfn,
 124     .class_init    = pvpanic_isa_class_init,
 125     .interfaces = (InterfaceInfo[]) {
 126         { TYPE_ACPI_DEV_AML_IF },
 127         { },
 128     },
 129 };
 130
 131 static void pvpanic_register_types(void)
 132 {
 133     type_register_static(&pvpanic_isa_info);
 134 }
 135
 136 type_init(pvpanic_register_types)