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26#include "qemu/osdep.h"
27#include "qapi/error.h"
28#include "hw/irq.h"
29#include "hw/i386/pc.h"
30#include "hw/southbridge/piix.h"
31#include "hw/pci/pci.h"
32#include "hw/isa/isa.h"
33#include "hw/sysbus.h"
34#include "hw/dma/i8257.h"
35#include "hw/timer/i8254.h"
36#include "hw/rtc/mc146818rtc.h"
37#include "hw/ide.h"
38#include "migration/vmstate.h"
39#include "sysemu/reset.h"
40#include "sysemu/runstate.h"
41
42PCIDevice *piix4_dev;
43
44typedef struct PIIX4State {
45 PCIDevice dev;
46 qemu_irq cpu_intr;
47 qemu_irq *isa;
48
49 RTCState rtc;
50
51 MemoryRegion rcr_mem;
52 uint8_t rcr;
53} PIIX4State;
54
55#define PIIX4_PCI_DEVICE(obj) \
56 OBJECT_CHECK(PIIX4State, (obj), TYPE_PIIX4_PCI_DEVICE)
57
58static void piix4_isa_reset(DeviceState *dev)
59{
60 PIIX4State *d = PIIX4_PCI_DEVICE(dev);
61 uint8_t *pci_conf = d->dev.config;
62
63 pci_conf[0x04] = 0x07;
64 pci_conf[0x05] = 0x00;
65 pci_conf[0x06] = 0x00;
66 pci_conf[0x07] = 0x02;
67 pci_conf[0x4c] = 0x4d;
68 pci_conf[0x4e] = 0x03;
69 pci_conf[0x4f] = 0x00;
70 pci_conf[0x60] = 0x0a;
71 pci_conf[0x61] = 0x0a;
72 pci_conf[0x62] = 0x0b;
73 pci_conf[0x63] = 0x0b;
74 pci_conf[0x69] = 0x02;
75 pci_conf[0x70] = 0x80;
76 pci_conf[0x76] = 0x0c;
77 pci_conf[0x77] = 0x0c;
78 pci_conf[0x78] = 0x02;
79 pci_conf[0x79] = 0x00;
80 pci_conf[0x80] = 0x00;
81 pci_conf[0x82] = 0x00;
82 pci_conf[0xa0] = 0x08;
83 pci_conf[0xa2] = 0x00;
84 pci_conf[0xa3] = 0x00;
85 pci_conf[0xa4] = 0x00;
86 pci_conf[0xa5] = 0x00;
87 pci_conf[0xa6] = 0x00;
88 pci_conf[0xa7] = 0x00;
89 pci_conf[0xa8] = 0x0f;
90 pci_conf[0xaa] = 0x00;
91 pci_conf[0xab] = 0x00;
92 pci_conf[0xac] = 0x00;
93 pci_conf[0xae] = 0x00;
94}
95
96static const VMStateDescription vmstate_piix4 = {
97 .name = "PIIX4",
98 .version_id = 2,
99 .minimum_version_id = 2,
100 .fields = (VMStateField[]) {
101 VMSTATE_PCI_DEVICE(dev, PIIX4State),
102 VMSTATE_END_OF_LIST()
103 }
104};
105
106static void piix4_request_i8259_irq(void *opaque, int irq, int level)
107{
108 PIIX4State *s = opaque;
109 qemu_set_irq(s->cpu_intr, level);
110}
111
112static void piix4_set_i8259_irq(void *opaque, int irq, int level)
113{
114 PIIX4State *s = opaque;
115 qemu_set_irq(s->isa[irq], level);
116}
117
118static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val,
119 unsigned int len)
120{
121 PIIX4State *s = opaque;
122
123 if (val & 4) {
124 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
125 return;
126 }
127
128 s->rcr = val & 2;
129}
130
131static uint64_t piix4_rcr_read(void *opaque, hwaddr addr, unsigned int len)
132{
133 PIIX4State *s = opaque;
134
135 return s->rcr;
136}
137
138static const MemoryRegionOps piix4_rcr_ops = {
139 .read = piix4_rcr_read,
140 .write = piix4_rcr_write,
141 .endianness = DEVICE_LITTLE_ENDIAN,
142 .impl = {
143 .min_access_size = 1,
144 .max_access_size = 1,
145 },
146};
147
148static void piix4_realize(PCIDevice *dev, Error **errp)
149{
150 PIIX4State *s = PIIX4_PCI_DEVICE(dev);
151 ISABus *isa_bus;
152 qemu_irq *i8259_out_irq;
153 Error *err = NULL;
154
155 isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev),
156 pci_address_space_io(dev), errp);
157 if (!isa_bus) {
158 return;
159 }
160
161 qdev_init_gpio_in_named(DEVICE(dev), piix4_set_i8259_irq,
162 "isa", ISA_NUM_IRQS);
163 qdev_init_gpio_out_named(DEVICE(dev), &s->cpu_intr,
164 "intr", 1);
165
166 memory_region_init_io(&s->rcr_mem, OBJECT(dev), &piix4_rcr_ops, s,
167 "reset-control", 1);
168 memory_region_add_subregion_overlap(pci_address_space_io(dev),
169 PIIX_RCR_IOPORT, &s->rcr_mem, 1);
170
171
172 i8259_out_irq = qemu_allocate_irqs(piix4_request_i8259_irq, s, 1);
173 s->isa = i8259_init(isa_bus, *i8259_out_irq);
174
175
176 isa_bus_irqs(isa_bus, s->isa);
177
178
179 i8254_pit_init(isa_bus, 0x40, 0, NULL);
180
181
182 i8257_dma_init(isa_bus, 0);
183
184
185 qdev_set_parent_bus(DEVICE(&s->rtc), BUS(isa_bus));
186 qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000);
187 object_property_set_bool(OBJECT(&s->rtc), true, "realized", &err);
188 if (err) {
189 error_propagate(errp, err);
190 return;
191 }
192 isa_init_irq(ISA_DEVICE(&s->rtc), &s->rtc.irq, RTC_ISA_IRQ);
193
194 piix4_dev = dev;
195}
196
197static void piix4_init(Object *obj)
198{
199 PIIX4State *s = PIIX4_PCI_DEVICE(obj);
200
201 object_initialize(&s->rtc, sizeof(s->rtc), TYPE_MC146818_RTC);
202}
203
204static void piix4_class_init(ObjectClass *klass, void *data)
205{
206 DeviceClass *dc = DEVICE_CLASS(klass);
207 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
208
209 k->realize = piix4_realize;
210 k->vendor_id = PCI_VENDOR_ID_INTEL;
211 k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0;
212 k->class_id = PCI_CLASS_BRIDGE_ISA;
213 dc->reset = piix4_isa_reset;
214 dc->desc = "ISA bridge";
215 dc->vmsd = &vmstate_piix4;
216
217
218
219
220 dc->user_creatable = false;
221 dc->hotpluggable = false;
222}
223
224static const TypeInfo piix4_info = {
225 .name = TYPE_PIIX4_PCI_DEVICE,
226 .parent = TYPE_PCI_DEVICE,
227 .instance_size = sizeof(PIIX4State),
228 .instance_init = piix4_init,
229 .class_init = piix4_class_init,
230 .interfaces = (InterfaceInfo[]) {
231 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
232 { },
233 },
234};
235
236static void piix4_register_types(void)
237{
238 type_register_static(&piix4_info);
239}
240
241type_init(piix4_register_types)
242
243DeviceState *piix4_create(PCIBus *pci_bus, ISABus **isa_bus,
244 I2CBus **smbus, size_t ide_buses)
245{
246 size_t ide_drives = ide_buses * MAX_IDE_DEVS;
247 DriveInfo **hd;
248 PCIDevice *pci;
249 DeviceState *dev;
250
251 pci = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(10, 0),
252 true, TYPE_PIIX4_PCI_DEVICE);
253 dev = DEVICE(pci);
254 if (isa_bus) {
255 *isa_bus = ISA_BUS(qdev_get_child_bus(dev, "isa.0"));
256 }
257
258 hd = g_new(DriveInfo *, ide_drives);
259 ide_drive_get(hd, ide_drives);
260 pci_piix4_ide_init(pci_bus, hd, pci->devfn + 1);
261 g_free(hd);
262 pci_create_simple(pci_bus, pci->devfn + 2, "piix4-usb-uhci");
263 if (smbus) {
264 *smbus = piix4_pm_init(pci_bus, pci->devfn + 3, 0x1100,
265 isa_get_irq(NULL, 9), NULL, 0, NULL);
266 }
267
268 return dev;
269}
270
