xref: /openbmc/qemu/hw/misc/pvpanic-isa.c (revision 2e1cacfb)
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)
137