2 * QEMU Intel i82378 emulation (PCI to ISA bridge)
4 * Copyright (c) 2010-2011 Hervé Poussineau
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "hw/pci/pci.h"
23 #include "hw/intc/i8259.h"
24 #include "hw/timer/i8254.h"
25 #include "migration/vmstate.h"
26 #include "hw/audio/pcspk.h"
27 #include "qom/object.h"
29 #define TYPE_I82378 "i82378"
30 typedef struct I82378State I82378State
;
31 DECLARE_INSTANCE_CHECKER(I82378State
, I82378
,
42 static const VMStateDescription vmstate_i82378
= {
45 .minimum_version_id
= 0,
46 .fields
= (VMStateField
[]) {
47 VMSTATE_PCI_DEVICE(parent_obj
, I82378State
),
52 static void i82378_request_out0_irq(void *opaque
, int irq
, int level
)
54 I82378State
*s
= opaque
;
55 qemu_set_irq(s
->out
[0], level
);
58 static void i82378_request_pic_irq(void *opaque
, int irq
, int level
)
60 DeviceState
*dev
= opaque
;
61 I82378State
*s
= I82378(dev
);
63 qemu_set_irq(s
->i8259
[irq
], level
);
66 static void i82378_realize(PCIDevice
*pci
, Error
**errp
)
68 DeviceState
*dev
= DEVICE(pci
);
69 I82378State
*s
= I82378(dev
);
74 pci_conf
= pci
->config
;
75 pci_set_word(pci_conf
+ PCI_COMMAND
,
76 PCI_COMMAND_IO
| PCI_COMMAND_MEMORY
| PCI_COMMAND_MASTER
);
77 pci_set_word(pci_conf
+ PCI_STATUS
,
78 PCI_STATUS_DEVSEL_MEDIUM
);
80 pci_config_set_interrupt_pin(pci_conf
, 1); /* interrupt pin 0 */
82 isabus
= isa_bus_new(dev
, get_system_memory(),
83 pci_address_space_io(pci
), errp
);
93 Utility Bus Support Registers
95 All devices accept byte access only, except timer
99 s
->i8259
= i8259_init(isabus
,
100 qemu_allocate_irq(i82378_request_out0_irq
, s
, 0));
101 isa_bus_irqs(isabus
, s
->i8259
);
104 pit
= i8254_pit_init(isabus
, 0x40, 0, NULL
);
107 pcspk_init(isa_new(TYPE_PC_SPEAKER
), isabus
, pit
);
110 isa_create_simple(isabus
, "i82374");
113 static void i82378_init(Object
*obj
)
115 DeviceState
*dev
= DEVICE(obj
);
116 I82378State
*s
= I82378(obj
);
118 qdev_init_gpio_out(dev
, s
->out
, 1);
119 qdev_init_gpio_in(dev
, i82378_request_pic_irq
, 16);
122 static void i82378_class_init(ObjectClass
*klass
, void *data
)
124 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
125 DeviceClass
*dc
= DEVICE_CLASS(klass
);
127 k
->realize
= i82378_realize
;
128 k
->vendor_id
= PCI_VENDOR_ID_INTEL
;
129 k
->device_id
= PCI_DEVICE_ID_INTEL_82378
;
131 k
->class_id
= PCI_CLASS_BRIDGE_ISA
;
132 dc
->vmsd
= &vmstate_i82378
;
133 set_bit(DEVICE_CATEGORY_BRIDGE
, dc
->categories
);
136 static const TypeInfo i82378_type_info
= {
138 .parent
= TYPE_PCI_DEVICE
,
139 .instance_size
= sizeof(I82378State
),
140 .instance_init
= i82378_init
,
141 .class_init
= i82378_class_init
,
142 .interfaces
= (InterfaceInfo
[]) {
143 { INTERFACE_CONVENTIONAL_PCI_DEVICE
},
148 static void i82378_register_types(void)
150 type_register_static(&i82378_type_info
);
153 type_init(i82378_register_types
)