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pvpanic-isa.c (3892B)

      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)