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[qmiga/qemu.git] / hw / isa / piix4.c
1 /*
2  * QEMU PIIX4 PCI Bridge Emulation
3  *
4  * Copyright (c) 2006 Fabrice Bellard
5  * Copyright (c) 2018 HervĂ© Poussineau
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a copy
8  * of this software and associated documentation files (the "Software"), to deal
9  * in the Software without restriction, including without limitation the rights
10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11  * copies of the Software, and to permit persons to whom the Software is
12  * furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23  * THE SOFTWARE.
24  */
25
26 #include "qemu/osdep.h"
27 #include "qapi/error.h"
28 #include "hw/irq.h"
29 #include "hw/southbridge/piix.h"
30 #include "hw/pci/pci.h"
31 #include "hw/ide/piix.h"
32 #include "hw/isa/isa.h"
33 #include "hw/intc/i8259.h"
34 #include "hw/dma/i8257.h"
35 #include "hw/timer/i8254.h"
36 #include "hw/rtc/mc146818rtc.h"
37 #include "hw/ide/pci.h"
38 #include "hw/acpi/piix4.h"
39 #include "hw/usb/hcd-uhci.h"
40 #include "migration/vmstate.h"
41 #include "sysemu/reset.h"
42 #include "sysemu/runstate.h"
43 #include "qom/object.h"
44
45 struct PIIX4State {
46     PCIDevice dev;
47     qemu_irq cpu_intr;
48     qemu_irq *isa;
49
50     MC146818RtcState rtc;
51     PCIIDEState ide;
52     UHCIState uhci;
53     PIIX4PMState pm;
54     /* Reset Control Register */
55     MemoryRegion rcr_mem;
56     uint8_t rcr;
57 };
58
59 OBJECT_DECLARE_SIMPLE_TYPE(PIIX4State, PIIX4_PCI_DEVICE)
60
61 static void piix4_set_irq(void *opaque, int irq_num, int level)
62 {
63     int i, pic_irq, pic_level;
64     PIIX4State *s = opaque;
65     PCIBus *bus = pci_get_bus(&s->dev);
66
67     /* now we change the pic irq level according to the piix irq mappings */
68     /* XXX: optimize */
69     pic_irq = s->dev.config[PIIX_PIRQCA + irq_num];
70     if (pic_irq < ISA_NUM_IRQS) {
71         /* The pic level is the logical OR of all the PCI irqs mapped to it. */
72         pic_level = 0;
73         for (i = 0; i < PIIX_NUM_PIRQS; i++) {
74             if (pic_irq == s->dev.config[PIIX_PIRQCA + i]) {
75                 pic_level |= pci_bus_get_irq_level(bus, i);
76             }
77         }
78         qemu_set_irq(s->isa[pic_irq], pic_level);
79     }
80 }
81
82 static void piix4_isa_reset(DeviceState *dev)
83 {
84     PIIX4State *d = PIIX4_PCI_DEVICE(dev);
85     uint8_t *pci_conf = d->dev.config;
86
87     pci_conf[0x04] = 0x07; // master, memory and I/O
88     pci_conf[0x05] = 0x00;
89     pci_conf[0x06] = 0x00;
90     pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
91     pci_conf[0x4c] = 0x4d;
92     pci_conf[0x4e] = 0x03;
93     pci_conf[0x4f] = 0x00;
94     pci_conf[0x60] = 0x80;
95     pci_conf[0x61] = 0x80;
96     pci_conf[0x62] = 0x80;
97     pci_conf[0x63] = 0x80;
98     pci_conf[0x69] = 0x02;
99     pci_conf[0x70] = 0x80;
100     pci_conf[0x76] = 0x0c;
101     pci_conf[0x77] = 0x0c;
102     pci_conf[0x78] = 0x02;
103     pci_conf[0x79] = 0x00;
104     pci_conf[0x80] = 0x00;
105     pci_conf[0x82] = 0x00;
106     pci_conf[0xa0] = 0x08;
107     pci_conf[0xa2] = 0x00;
108     pci_conf[0xa3] = 0x00;
109     pci_conf[0xa4] = 0x00;
110     pci_conf[0xa5] = 0x00;
111     pci_conf[0xa6] = 0x00;
112     pci_conf[0xa7] = 0x00;
113     pci_conf[0xa8] = 0x0f;
114     pci_conf[0xaa] = 0x00;
115     pci_conf[0xab] = 0x00;
116     pci_conf[0xac] = 0x00;
117     pci_conf[0xae] = 0x00;
118
119     d->rcr = 0;
120 }
121
122 static int piix4_post_load(void *opaque, int version_id)
123 {
124     PIIX4State *s = opaque;
125
126     if (version_id == 2) {
127         s->rcr = 0;
128     }
129
130     return 0;
131 }
132
133 static const VMStateDescription vmstate_piix4 = {
134     .name = "PIIX4",
135     .version_id = 3,
136     .minimum_version_id = 2,
137     .post_load = piix4_post_load,
138     .fields = (VMStateField[]) {
139         VMSTATE_PCI_DEVICE(dev, PIIX4State),
140         VMSTATE_UINT8_V(rcr, PIIX4State, 3),
141         VMSTATE_END_OF_LIST()
142     }
143 };
144
145 static void piix4_request_i8259_irq(void *opaque, int irq, int level)
146 {
147     PIIX4State *s = opaque;
148     qemu_set_irq(s->cpu_intr, level);
149 }
150
151 static void piix4_set_i8259_irq(void *opaque, int irq, int level)
152 {
153     PIIX4State *s = opaque;
154     qemu_set_irq(s->isa[irq], level);
155 }
156
157 static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val,
158                             unsigned int len)
159 {
160     PIIX4State *s = opaque;
161
162     if (val & 4) {
163         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
164         return;
165     }
166
167     s->rcr = val & 2; /* keep System Reset type only */
168 }
169
170 static uint64_t piix4_rcr_read(void *opaque, hwaddr addr, unsigned int len)
171 {
172     PIIX4State *s = opaque;
173
174     return s->rcr;
175 }
176
177 static const MemoryRegionOps piix4_rcr_ops = {
178     .read = piix4_rcr_read,
179     .write = piix4_rcr_write,
180     .endianness = DEVICE_LITTLE_ENDIAN,
181     .impl = {
182         .min_access_size = 1,
183         .max_access_size = 1,
184     },
185 };
186
187 static void piix4_realize(PCIDevice *dev, Error **errp)
188 {
189     PIIX4State *s = PIIX4_PCI_DEVICE(dev);
190     PCIBus *pci_bus = pci_get_bus(dev);
191     ISABus *isa_bus;
192     qemu_irq *i8259_out_irq;
193
194     isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev),
195                           pci_address_space_io(dev), errp);
196     if (!isa_bus) {
197         return;
198     }
199
200     qdev_init_gpio_in_named(DEVICE(dev), piix4_set_i8259_irq,
201                             "isa", ISA_NUM_IRQS);
202     qdev_init_gpio_out_named(DEVICE(dev), &s->cpu_intr,
203                              "intr", 1);
204
205     memory_region_init_io(&s->rcr_mem, OBJECT(dev), &piix4_rcr_ops, s,
206                           "reset-control", 1);
207     memory_region_add_subregion_overlap(pci_address_space_io(dev),
208                                         PIIX_RCR_IOPORT, &s->rcr_mem, 1);
209
210     /* initialize i8259 pic */
211     i8259_out_irq = qemu_allocate_irqs(piix4_request_i8259_irq, s, 1);
212     s->isa = i8259_init(isa_bus, *i8259_out_irq);
213
214     /* initialize ISA irqs */
215     isa_bus_register_input_irqs(isa_bus, s->isa);
216
217     /* initialize pit */
218     i8254_pit_init(isa_bus, 0x40, 0, NULL);
219
220     /* DMA */
221     i8257_dma_init(isa_bus, 0);
222
223     /* RTC */
224     qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000);
225     if (!qdev_realize(DEVICE(&s->rtc), BUS(isa_bus), errp)) {
226         return;
227     }
228     s->rtc.irq = isa_get_irq(ISA_DEVICE(&s->rtc), s->rtc.isairq);
229
230     /* IDE */
231     qdev_prop_set_int32(DEVICE(&s->ide), "addr", dev->devfn + 1);
232     if (!qdev_realize(DEVICE(&s->ide), BUS(pci_bus), errp)) {
233         return;
234     }
235
236     /* USB */
237     qdev_prop_set_int32(DEVICE(&s->uhci), "addr", dev->devfn + 2);
238     if (!qdev_realize(DEVICE(&s->uhci), BUS(pci_bus), errp)) {
239         return;
240     }
241
242     /* ACPI controller */
243     qdev_prop_set_int32(DEVICE(&s->pm), "addr", dev->devfn + 3);
244     if (!qdev_realize(DEVICE(&s->pm), BUS(pci_bus), errp)) {
245         return;
246     }
247     qdev_connect_gpio_out(DEVICE(&s->pm), 0, s->isa[9]);
248
249     pci_bus_irqs(pci_bus, piix4_set_irq, s, PIIX_NUM_PIRQS);
250 }
251
252 static void piix4_init(Object *obj)
253 {
254     PIIX4State *s = PIIX4_PCI_DEVICE(obj);
255
256     object_initialize_child(obj, "rtc", &s->rtc, TYPE_MC146818_RTC);
257     object_initialize_child(obj, "ide", &s->ide, TYPE_PIIX4_IDE);
258     object_initialize_child(obj, "uhci", &s->uhci, TYPE_PIIX4_USB_UHCI);
259
260     object_initialize_child(obj, "pm", &s->pm, TYPE_PIIX4_PM);
261     qdev_prop_set_uint32(DEVICE(&s->pm), "smb_io_base", 0x1100);
262     qdev_prop_set_bit(DEVICE(&s->pm), "smm-enabled", 0);
263 }
264
265 static void piix4_class_init(ObjectClass *klass, void *data)
266 {
267     DeviceClass *dc = DEVICE_CLASS(klass);
268     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
269
270     k->realize = piix4_realize;
271     k->vendor_id = PCI_VENDOR_ID_INTEL;
272     k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0;
273     k->class_id = PCI_CLASS_BRIDGE_ISA;
274     dc->reset = piix4_isa_reset;
275     dc->desc = "ISA bridge";
276     dc->vmsd = &vmstate_piix4;
277     /*
278      * Reason: part of PIIX4 southbridge, needs to be wired up,
279      * e.g. by mips_malta_init()
280      */
281     dc->user_creatable = false;
282     dc->hotpluggable = false;
283 }
284
285 static const TypeInfo piix4_info = {
286     .name          = TYPE_PIIX4_PCI_DEVICE,
287     .parent        = TYPE_PCI_DEVICE,
288     .instance_size = sizeof(PIIX4State),
289     .instance_init = piix4_init,
290     .class_init    = piix4_class_init,
291     .interfaces = (InterfaceInfo[]) {
292         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
293         { },
294     },
295 };
296
297 static void piix4_register_types(void)
298 {
299     type_register_static(&piix4_info);
300 }
301
302 type_init(piix4_register_types)