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 #include "hw/acpi/acpi_aml_interface.h"
  26
  27 OBJECT_DECLARE_SIMPLE_TYPE(PVPanicISAState, PVPANIC_ISA_DEVICE)
  28
  29 /*
  30  * PVPanicISAState for ISA device and
  31  * use ioport.
  32  */
  33 struct PVPanicISAState {
  34     ISADevice parent_obj;
  35
  36     uint16_t ioport;
  37     PVPanicState pvpanic;
  38 };
  39
  40 static void pvpanic_isa_initfn(Object *obj)
  41 {
  42     PVPanicISAState *s = PVPANIC_ISA_DEVICE(obj);
  43
  44     pvpanic_setup_io(&s->pvpanic, DEVICE(s), 1);
  45 }
  46
  47 static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
  48 {
  49     ISADevice *d = ISA_DEVICE(dev);
  50     PVPanicISAState *s = PVPANIC_ISA_DEVICE(dev);
  51     PVPanicState *ps = &s->pvpanic;
  52     FWCfgState *fw_cfg = fw_cfg_find();
  53     uint16_t *pvpanic_port;
  54
  55     if (!fw_cfg) {
  56         return;
  57     }
  58
  59     pvpanic_port = g_malloc(sizeof(*pvpanic_port));
  60     *pvpanic_port = cpu_to_le16(s->ioport);
  61     fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
  62                     sizeof(*pvpanic_port));
  63
  64     isa_register_ioport(d, &ps->mr, s->ioport);
  65 }
  66
  67 static void build_pvpanic_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
  68 {
  69     Aml *crs, *field, *method;
  70     PVPanicISAState *s = PVPANIC_ISA_DEVICE(adev);
  71     Aml *dev = aml_device("PEVT");
  72
  73     aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0001")));
  74
  75     crs = aml_resource_template();
  76     aml_append(crs,
  77         aml_io(AML_DECODE16, s->ioport, s->ioport, 1, 1)
  78     );
  79     aml_append(dev, aml_name_decl("_CRS", crs));
  80
  81     aml_append(dev, aml_operation_region("PEOR", AML_SYSTEM_IO,
  82                                           aml_int(s->ioport), 1));
  83     field = aml_field("PEOR", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
  84     aml_append(field, aml_named_field("PEPT", 8));
  85     aml_append(dev, field);
  86
  87     /* device present, functioning, decoding, shown in UI */
  88     aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
  89
  90     method = aml_method("RDPT", 0, AML_NOTSERIALIZED);
  91     aml_append(method, aml_store(aml_name("PEPT"), aml_local(0)));
  92     aml_append(method, aml_return(aml_local(0)));
  93     aml_append(dev, method);
  94
  95     method = aml_method("WRPT", 1, AML_NOTSERIALIZED);
  96     aml_append(method, aml_store(aml_arg(0), aml_name("PEPT")));
  97     aml_append(dev, method);
  98
  99     aml_append(scope, dev);
 100 }
 101
 102 static Property pvpanic_isa_properties[] = {
 103     DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicISAState, ioport, 0x505),
 104     DEFINE_PROP_UINT8("events", PVPanicISAState, pvpanic.events,
 105                       PVPANIC_PANICKED | PVPANIC_CRASH_LOADED),
 106     DEFINE_PROP_END_OF_LIST(),
 107 };
 108
 109 static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
 110 {
 111     DeviceClass *dc = DEVICE_CLASS(klass);
 112     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
 113
 114     dc->realize = pvpanic_isa_realizefn;
 115     device_class_set_props(dc, pvpanic_isa_properties);
 116     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 117     adevc->build_dev_aml = build_pvpanic_isa_aml;
 118 }
 119
 120 static const TypeInfo pvpanic_isa_info = {
 121     .name          = TYPE_PVPANIC_ISA_DEVICE,
 122     .parent        = TYPE_ISA_DEVICE,
 123     .instance_size = sizeof(PVPanicISAState),
 124     .instance_init = pvpanic_isa_initfn,
 125     .class_init    = pvpanic_isa_class_init,
 126     .interfaces = (InterfaceInfo[]) {
 127         { TYPE_ACPI_DEV_AML_IF },
 128         { },
 129     },
 130 };
 131
 132 static void pvpanic_register_types(void)
 133 {
 134     type_register_static(&pvpanic_isa_info);
 135 }
 136
 137 type_init(pvpanic_register_types)