2 * QEMU i440FX/PIIX3 PCI Bridge Emulation
4 * Copyright (c) 2006 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 typedef PCIHostState I440FXState;
34 typedef struct PIIX3State {
36 int pci_irq_levels[4];
40 struct PCII440FXState {
42 target_phys_addr_t isa_page_descs[384 / 4];
47 static void i440fx_addr_writel(void* opaque, uint32_t addr, uint32_t val)
49 I440FXState *s = opaque;
53 static uint32_t i440fx_addr_readl(void* opaque, uint32_t addr)
55 I440FXState *s = opaque;
59 static void piix3_set_irq(void *opaque, int irq_num, int level);
61 /* return the global irq number corresponding to a given device irq
62 pin. We could also use the bus number to have a more precise
64 static int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
67 slot_addend = (pci_dev->devfn >> 3) - 1;
68 return (irq_num + slot_addend) & 3;
71 static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r)
75 // printf("ISA mapping %08x-0x%08x: %d\n", start, end, r);
79 cpu_register_physical_memory(start, end - start,
83 /* ROM (XXX: not quite correct) */
84 cpu_register_physical_memory(start, end - start,
89 /* XXX: should distinguish read/write cases */
90 for(addr = start; addr < end; addr += 4096) {
91 cpu_register_physical_memory(addr, 4096,
92 d->isa_page_descs[(addr - 0xa0000) >> 12]);
98 static void i440fx_update_memory_mappings(PCII440FXState *d)
101 uint32_t smram, addr;
103 update_pam(d, 0xf0000, 0x100000, (d->dev.config[0x59] >> 4) & 3);
104 for(i = 0; i < 12; i++) {
105 r = (d->dev.config[(i >> 1) + 0x5a] >> ((i & 1) * 4)) & 3;
106 update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r);
108 smram = d->dev.config[0x72];
109 if ((d->smm_enabled && (smram & 0x08)) || (smram & 0x40)) {
110 cpu_register_physical_memory(0xa0000, 0x20000, 0xa0000);
112 for(addr = 0xa0000; addr < 0xc0000; addr += 4096) {
113 cpu_register_physical_memory(addr, 4096,
114 d->isa_page_descs[(addr - 0xa0000) >> 12]);
119 void i440fx_set_smm(PCII440FXState *d, int val)
122 if (d->smm_enabled != val) {
123 d->smm_enabled = val;
124 i440fx_update_memory_mappings(d);
129 /* XXX: suppress when better memory API. We make the assumption that
130 no device (in particular the VGA) changes the memory mappings in
131 the 0xa0000-0x100000 range */
132 void i440fx_init_memory_mappings(PCII440FXState *d)
135 for(i = 0; i < 96; i++) {
136 d->isa_page_descs[i] = cpu_get_physical_page_desc(0xa0000 + i * 0x1000);
140 static void i440fx_write_config(PCIDevice *dev,
141 uint32_t address, uint32_t val, int len)
143 PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
145 /* XXX: implement SMRAM.D_LOCK */
146 pci_default_write_config(dev, address, val, len);
147 if ((address >= 0x59 && address <= 0x5f) || address == 0x72)
148 i440fx_update_memory_mappings(d);
151 static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id)
153 PCII440FXState *d = opaque;
156 ret = pci_device_load(&d->dev, f);
159 i440fx_update_memory_mappings(d);
160 qemu_get_8s(f, &d->smm_enabled);
163 for (i = 0; i < 4; i++)
164 d->piix3->pci_irq_levels[i] = qemu_get_be32(f);
169 static int i440fx_post_load(void *opaque, int version_id)
171 PCII440FXState *d = opaque;
173 i440fx_update_memory_mappings(d);
177 static const VMStateDescription vmstate_i440fx = {
180 .minimum_version_id = 3,
181 .minimum_version_id_old = 1,
182 .load_state_old = i440fx_load_old,
183 .post_load = i440fx_post_load,
184 .fields = (VMStateField []) {
185 VMSTATE_PCI_DEVICE(dev, PCII440FXState),
186 VMSTATE_UINT8(smm_enabled, PCII440FXState),
187 VMSTATE_END_OF_LIST()
191 static int i440fx_pcihost_initfn(SysBusDevice *dev)
193 I440FXState *s = FROM_SYSBUS(I440FXState, dev);
195 register_ioport_write(0xcf8, 4, 4, i440fx_addr_writel, s);
196 register_ioport_read(0xcf8, 4, 4, i440fx_addr_readl, s);
198 pci_host_data_register_ioport(0xcfc, s);
202 static int i440fx_initfn(PCIDevice *dev)
204 PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
206 pci_config_set_vendor_id(d->dev.config, PCI_VENDOR_ID_INTEL);
207 pci_config_set_device_id(d->dev.config, PCI_DEVICE_ID_INTEL_82441);
208 d->dev.config[0x08] = 0x02; // revision
209 pci_config_set_class(d->dev.config, PCI_CLASS_BRIDGE_HOST);
210 d->dev.config[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
212 d->dev.config[0x72] = 0x02; /* SMRAM */
214 vmstate_register(0, &vmstate_i440fx, d);
218 PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq *pic)
226 dev = qdev_create(NULL, "i440FX-pcihost");
227 s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev));
228 b = pci_bus_new(&s->busdev.qdev, NULL, 0);
230 qdev_init_nofail(dev);
232 d = pci_create_simple(b, 0, "i440FX");
233 *pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
235 piix3 = DO_UPCAST(PIIX3State, dev,
236 pci_create_simple(b, -1, "PIIX3"));
238 pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, 4);
239 (*pi440fx_state)->piix3 = piix3;
241 *piix3_devfn = piix3->dev.devfn;
246 /* PIIX3 PCI to ISA bridge */
248 static void piix3_set_irq(void *opaque, int irq_num, int level)
250 int i, pic_irq, pic_level;
251 PIIX3State *piix3 = opaque;
253 piix3->pci_irq_levels[irq_num] = level;
255 /* now we change the pic irq level according to the piix irq mappings */
257 pic_irq = piix3->dev.config[0x60 + irq_num];
259 /* The pic level is the logical OR of all the PCI irqs mapped
262 for (i = 0; i < 4; i++) {
263 if (pic_irq == piix3->dev.config[0x60 + i])
264 pic_level |= piix3->pci_irq_levels[i];
266 qemu_set_irq(piix3->pic[pic_irq], pic_level);
270 static void piix3_reset(void *opaque)
272 PIIX3State *d = opaque;
273 uint8_t *pci_conf = d->dev.config;
275 pci_conf[0x04] = 0x07; // master, memory and I/O
276 pci_conf[0x05] = 0x00;
277 pci_conf[0x06] = 0x00;
278 pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
279 pci_conf[0x4c] = 0x4d;
280 pci_conf[0x4e] = 0x03;
281 pci_conf[0x4f] = 0x00;
282 pci_conf[0x60] = 0x80;
283 pci_conf[0x61] = 0x80;
284 pci_conf[0x62] = 0x80;
285 pci_conf[0x63] = 0x80;
286 pci_conf[0x69] = 0x02;
287 pci_conf[0x70] = 0x80;
288 pci_conf[0x76] = 0x0c;
289 pci_conf[0x77] = 0x0c;
290 pci_conf[0x78] = 0x02;
291 pci_conf[0x79] = 0x00;
292 pci_conf[0x80] = 0x00;
293 pci_conf[0x82] = 0x00;
294 pci_conf[0xa0] = 0x08;
295 pci_conf[0xa2] = 0x00;
296 pci_conf[0xa3] = 0x00;
297 pci_conf[0xa4] = 0x00;
298 pci_conf[0xa5] = 0x00;
299 pci_conf[0xa6] = 0x00;
300 pci_conf[0xa7] = 0x00;
301 pci_conf[0xa8] = 0x0f;
302 pci_conf[0xaa] = 0x00;
303 pci_conf[0xab] = 0x00;
304 pci_conf[0xac] = 0x00;
305 pci_conf[0xae] = 0x00;
307 memset(d->pci_irq_levels, 0, sizeof(d->pci_irq_levels));
310 static const VMStateDescription vmstate_piix3 = {
313 .minimum_version_id = 2,
314 .minimum_version_id_old = 2,
315 .fields = (VMStateField []) {
316 VMSTATE_PCI_DEVICE(dev, PIIX3State),
317 VMSTATE_INT32_ARRAY_V(pci_irq_levels, PIIX3State, 4, 3),
318 VMSTATE_END_OF_LIST()
322 static int piix3_initfn(PCIDevice *dev)
324 PIIX3State *d = DO_UPCAST(PIIX3State, dev, dev);
327 isa_bus_new(&d->dev.qdev);
328 vmstate_register(0, &vmstate_piix3, d);
330 pci_conf = d->dev.config;
331 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
332 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371SB_0); // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
333 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
334 pci_conf[PCI_HEADER_TYPE] =
335 PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
337 qemu_register_reset(piix3_reset, d);
341 static PCIDeviceInfo i440fx_info[] = {
343 .qdev.name = "i440FX",
344 .qdev.desc = "Host bridge",
345 .qdev.size = sizeof(PCII440FXState),
347 .init = i440fx_initfn,
348 .config_write = i440fx_write_config,
350 .qdev.name = "PIIX3",
351 .qdev.desc = "ISA bridge",
352 .qdev.size = sizeof(PIIX3State),
354 .init = piix3_initfn,
360 static SysBusDeviceInfo i440fx_pcihost_info = {
361 .init = i440fx_pcihost_initfn,
362 .qdev.name = "i440FX-pcihost",
363 .qdev.size = sizeof(I440FXState),
367 static void i440fx_register(void)
369 sysbus_register_withprop(&i440fx_pcihost_info);
370 pci_qdev_register_many(i440fx_info);
372 device_init(i440fx_register);