qemu

serial-isa.c
200 строк · 5.9 Кб
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/*
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 * QEMU 16550A UART emulation
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 *
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 * Copyright (c) 2003-2004 Fabrice Bellard
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 * Copyright (c) 2008 Citrix Systems, Inc.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/module.h"
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#include "sysemu/sysemu.h"
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#include "hw/acpi/acpi_aml_interface.h"
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#include "hw/char/serial.h"
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#include "hw/isa/isa.h"
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#include "hw/qdev-properties.h"
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#include "migration/vmstate.h"
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#include "qom/object.h"
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OBJECT_DECLARE_SIMPLE_TYPE(ISASerialState, ISA_SERIAL)
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struct ISASerialState {
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    ISADevice parent_obj;
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    uint32_t index;
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    uint32_t iobase;
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    uint32_t isairq;
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    SerialState state;
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};
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static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = {
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    0x3f8, 0x2f8, 0x3e8, 0x2e8
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};
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static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = {
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    4, 3, 4, 3
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};
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static void serial_isa_realizefn(DeviceState *dev, Error **errp)
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{
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    static int index;
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    ISADevice *isadev = ISA_DEVICE(dev);
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    ISASerialState *isa = ISA_SERIAL(dev);
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    SerialState *s = &isa->state;
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    if (isa->index == -1) {
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        isa->index = index;
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    }
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    if (isa->index >= MAX_ISA_SERIAL_PORTS) {
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        error_setg(errp, "Max. supported number of ISA serial ports is %d.",
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                   MAX_ISA_SERIAL_PORTS);
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        return;
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    }
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    if (isa->iobase == -1) {
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        isa->iobase = isa_serial_io[isa->index];
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    }
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    if (isa->isairq == -1) {
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        isa->isairq = isa_serial_irq[isa->index];
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    }
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    index++;
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    s->irq = isa_get_irq(isadev, isa->isairq);
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    qdev_realize(DEVICE(s), NULL, errp);
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    qdev_set_legacy_instance_id(dev, isa->iobase, 3);
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    memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
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    isa_register_ioport(isadev, &s->io, isa->iobase);
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}
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static void serial_isa_build_aml(AcpiDevAmlIf *adev, Aml *scope)
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{
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    ISASerialState *isa = ISA_SERIAL(adev);
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    Aml *dev;
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    Aml *crs;
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    crs = aml_resource_template();
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    aml_append(crs, aml_io(AML_DECODE16, isa->iobase, isa->iobase, 0x00, 0x08));
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    aml_append(crs, aml_irq_no_flags(isa->isairq));
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    dev = aml_device("COM%d", isa->index + 1);
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    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0501")));
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    aml_append(dev, aml_name_decl("_UID", aml_int(isa->index + 1)));
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    aml_append(dev, aml_name_decl("_STA", aml_int(0xf)));
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    aml_append(dev, aml_name_decl("_CRS", crs));
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    aml_append(scope, dev);
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}
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static const VMStateDescription vmstate_isa_serial = {
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    .name = "serial",
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    .version_id = 3,
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    .minimum_version_id = 2,
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    .fields = (const VMStateField[]) {
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        VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
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        VMSTATE_END_OF_LIST()
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    }
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};
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static Property serial_isa_properties[] = {
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    DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
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    DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
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    DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
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    DEFINE_PROP_END_OF_LIST(),
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};
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static void serial_isa_class_initfn(ObjectClass *klass, void *data)
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{
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    DeviceClass *dc = DEVICE_CLASS(klass);
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    AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
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    dc->realize = serial_isa_realizefn;
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    dc->vmsd = &vmstate_isa_serial;
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    adevc->build_dev_aml = serial_isa_build_aml;
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    device_class_set_props(dc, serial_isa_properties);
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    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
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}
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static void serial_isa_initfn(Object *o)
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{
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    ISASerialState *self = ISA_SERIAL(o);
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    object_initialize_child(o, "serial", &self->state, TYPE_SERIAL);
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    qdev_alias_all_properties(DEVICE(&self->state), o);
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}
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static const TypeInfo serial_isa_info = {
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    .name          = TYPE_ISA_SERIAL,
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    .parent        = TYPE_ISA_DEVICE,
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    .instance_size = sizeof(ISASerialState),
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    .instance_init = serial_isa_initfn,
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    .class_init    = serial_isa_class_initfn,
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    .interfaces = (InterfaceInfo[]) {
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        { TYPE_ACPI_DEV_AML_IF },
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        { },
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    },
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};
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static void serial_register_types(void)
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{
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    type_register_static(&serial_isa_info);
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}
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type_init(serial_register_types)
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static void serial_isa_init(ISABus *bus, int index, Chardev *chr)
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{
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    DeviceState *dev;
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    ISADevice *isadev;
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    isadev = isa_new(TYPE_ISA_SERIAL);
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    dev = DEVICE(isadev);
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    qdev_prop_set_uint32(dev, "index", index);
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    qdev_prop_set_chr(dev, "chardev", chr);
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    isa_realize_and_unref(isadev, bus, &error_fatal);
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}
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void serial_hds_isa_init(ISABus *bus, int from, int to)
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{
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    int i;
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    assert(from >= 0);
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    assert(to <= MAX_ISA_SERIAL_PORTS);
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    for (i = from; i < to; ++i) {
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        if (serial_hd(i)) {
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            serial_isa_init(bus, i, serial_hd(i));
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        }
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    }
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}
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void isa_serial_set_iobase(ISADevice *serial, hwaddr iobase)
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{
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    ISASerialState *s = ISA_SERIAL(serial);
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    serial->ioport_id = iobase;
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    s->iobase = iobase;
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    memory_region_set_address(&s->state.io, s->iobase);
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}
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void isa_serial_set_enabled(ISADevice *serial, bool enabled)
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{
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    memory_region_set_enabled(&ISA_SERIAL(serial)->state.io, enabled);
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}
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