4 * Copyright (c) 2004 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
34 pci_set_irq_fn set_irq;
35 pci_map_irq_fn map_irq;
36 uint32_t config_reg; /* XXX: suppress */
38 SetIRQFunc *low_set_irq;
40 PCIDevice *devices[256];
41 PCIDevice *parent_dev;
43 /* The bus IRQ state is the logical OR of the connected devices.
44 Keep a count of the number of devices with raised IRQs. */
49 static void pci_update_mappings(PCIDevice *d);
50 static void pci_set_irq(void *opaque, int irq_num, int level);
52 target_phys_addr_t pci_mem_base;
53 static int pci_irq_index;
54 static PCIBus *first_bus;
56 static void pcibus_save(QEMUFile *f, void *opaque)
58 PCIBus *bus = (PCIBus *)opaque;
61 qemu_put_be32(f, bus->nirq);
62 for (i = 0; i < bus->nirq; i++)
63 qemu_put_be32(f, bus->irq_count[i]);
66 static int pcibus_load(QEMUFile *f, void *opaque, int version_id)
68 PCIBus *bus = (PCIBus *)opaque;
74 nirq = qemu_get_be32(f);
75 if (bus->nirq != nirq) {
76 fprintf(stderr, "pcibus_load: nirq mismatch: src=%d dst=%d\n",
81 for (i = 0; i < nirq; i++)
82 bus->irq_count[i] = qemu_get_be32(f);
87 PCIBus *pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
88 qemu_irq *pic, int devfn_min, int nirq)
93 bus = qemu_mallocz(sizeof(PCIBus) + (nirq * sizeof(int)));
94 bus->set_irq = set_irq;
95 bus->map_irq = map_irq;
96 bus->irq_opaque = pic;
97 bus->devfn_min = devfn_min;
100 register_savevm("PCIBUS", nbus++, 1, pcibus_save, pcibus_load, bus);
104 static PCIBus *pci_register_secondary_bus(PCIDevice *dev, pci_map_irq_fn map_irq)
107 bus = qemu_mallocz(sizeof(PCIBus));
108 bus->map_irq = map_irq;
109 bus->parent_dev = dev;
110 bus->next = dev->bus->next;
111 dev->bus->next = bus;
115 int pci_bus_num(PCIBus *s)
120 void pci_device_save(PCIDevice *s, QEMUFile *f)
124 qemu_put_be32(f, 2); /* PCI device version */
125 qemu_put_buffer(f, s->config, 256);
126 for (i = 0; i < 4; i++)
127 qemu_put_be32(f, s->irq_state[i]);
130 int pci_device_load(PCIDevice *s, QEMUFile *f)
135 version_id = qemu_get_be32(f);
138 qemu_get_buffer(f, s->config, 256);
139 pci_update_mappings(s);
142 for (i = 0; i < 4; i ++)
143 s->irq_state[i] = qemu_get_be32(f);
148 /* -1 for devfn means auto assign */
149 PCIDevice *pci_register_device(PCIBus *bus, const char *name,
150 int instance_size, int devfn,
151 PCIConfigReadFunc *config_read,
152 PCIConfigWriteFunc *config_write)
156 if (pci_irq_index >= PCI_DEVICES_MAX)
160 for(devfn = bus->devfn_min ; devfn < 256; devfn += 8) {
161 if (!bus->devices[devfn])
167 pci_dev = qemu_mallocz(instance_size);
171 pci_dev->devfn = devfn;
172 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
173 memset(pci_dev->irq_state, 0, sizeof(pci_dev->irq_state));
176 config_read = pci_default_read_config;
178 config_write = pci_default_write_config;
179 pci_dev->config_read = config_read;
180 pci_dev->config_write = config_write;
181 pci_dev->irq_index = pci_irq_index++;
182 bus->devices[devfn] = pci_dev;
183 pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, 4);
187 void pci_register_io_region(PCIDevice *pci_dev, int region_num,
188 uint32_t size, int type,
189 PCIMapIORegionFunc *map_func)
194 if ((unsigned int)region_num >= PCI_NUM_REGIONS)
196 r = &pci_dev->io_regions[region_num];
200 r->map_func = map_func;
201 if (region_num == PCI_ROM_SLOT) {
204 addr = 0x10 + region_num * 4;
206 *(uint32_t *)(pci_dev->config + addr) = cpu_to_le32(type);
209 static target_phys_addr_t pci_to_cpu_addr(target_phys_addr_t addr)
211 return addr + pci_mem_base;
214 static void pci_update_mappings(PCIDevice *d)
218 uint32_t last_addr, new_addr, config_ofs;
220 cmd = le16_to_cpu(*(uint16_t *)(d->config + PCI_COMMAND));
221 for(i = 0; i < PCI_NUM_REGIONS; i++) {
222 r = &d->io_regions[i];
223 if (i == PCI_ROM_SLOT) {
226 config_ofs = 0x10 + i * 4;
229 if (r->type & PCI_ADDRESS_SPACE_IO) {
230 if (cmd & PCI_COMMAND_IO) {
231 new_addr = le32_to_cpu(*(uint32_t *)(d->config +
233 new_addr = new_addr & ~(r->size - 1);
234 last_addr = new_addr + r->size - 1;
235 /* NOTE: we have only 64K ioports on PC */
236 if (last_addr <= new_addr || new_addr == 0 ||
237 last_addr >= 0x10000) {
244 if (cmd & PCI_COMMAND_MEMORY) {
245 new_addr = le32_to_cpu(*(uint32_t *)(d->config +
247 /* the ROM slot has a specific enable bit */
248 if (i == PCI_ROM_SLOT && !(new_addr & 1))
250 new_addr = new_addr & ~(r->size - 1);
251 last_addr = new_addr + r->size - 1;
252 /* NOTE: we do not support wrapping */
253 /* XXX: as we cannot support really dynamic
254 mappings, we handle specific values as invalid
256 if (last_addr <= new_addr || new_addr == 0 ||
265 /* now do the real mapping */
266 if (new_addr != r->addr) {
268 if (r->type & PCI_ADDRESS_SPACE_IO) {
270 /* NOTE: specific hack for IDE in PC case:
271 only one byte must be mapped. */
272 class = d->config[0x0a] | (d->config[0x0b] << 8);
273 if (class == 0x0101 && r->size == 4) {
274 isa_unassign_ioport(r->addr + 2, 1);
276 isa_unassign_ioport(r->addr, r->size);
279 cpu_register_physical_memory(pci_to_cpu_addr(r->addr),
286 r->map_func(d, i, r->addr, r->size, r->type);
293 uint32_t pci_default_read_config(PCIDevice *d,
294 uint32_t address, int len)
301 if (address <= 0xfc) {
302 val = le32_to_cpu(*(uint32_t *)(d->config + address));
307 if (address <= 0xfe) {
308 val = le16_to_cpu(*(uint16_t *)(d->config + address));
313 val = d->config[address];
319 void pci_default_write_config(PCIDevice *d,
320 uint32_t address, uint32_t val, int len)
325 if (len == 4 && ((address >= 0x10 && address < 0x10 + 4 * 6) ||
326 (address >= 0x30 && address < 0x34))) {
330 if ( address >= 0x30 ) {
333 reg = (address - 0x10) >> 2;
335 r = &d->io_regions[reg];
338 /* compute the stored value */
339 if (reg == PCI_ROM_SLOT) {
340 /* keep ROM enable bit */
341 val &= (~(r->size - 1)) | 1;
343 val &= ~(r->size - 1);
346 *(uint32_t *)(d->config + address) = cpu_to_le32(val);
347 pci_update_mappings(d);
351 /* not efficient, but simple */
353 for(i = 0; i < len; i++) {
354 /* default read/write accesses */
355 switch(d->config[0x0e]) {
368 case 0x10 ... 0x27: /* base */
369 case 0x30 ... 0x33: /* rom */
390 case 0x38 ... 0x3b: /* rom */
401 d->config[addr] = val;
409 if (end > PCI_COMMAND && address < (PCI_COMMAND + 2)) {
410 /* if the command register is modified, we must modify the mappings */
411 pci_update_mappings(d);
415 void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
419 int config_addr, bus_num;
421 #if defined(DEBUG_PCI) && 0
422 printf("pci_data_write: addr=%08x val=%08x len=%d\n",
425 bus_num = (addr >> 16) & 0xff;
426 while (s && s->bus_num != bus_num)
430 pci_dev = s->devices[(addr >> 8) & 0xff];
433 config_addr = addr & 0xff;
434 #if defined(DEBUG_PCI)
435 printf("pci_config_write: %s: addr=%02x val=%08x len=%d\n",
436 pci_dev->name, config_addr, val, len);
438 pci_dev->config_write(pci_dev, config_addr, val, len);
441 uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
445 int config_addr, bus_num;
448 bus_num = (addr >> 16) & 0xff;
449 while (s && s->bus_num != bus_num)
453 pci_dev = s->devices[(addr >> 8) & 0xff];
470 config_addr = addr & 0xff;
471 val = pci_dev->config_read(pci_dev, config_addr, len);
472 #if defined(DEBUG_PCI)
473 printf("pci_config_read: %s: addr=%02x val=%08x len=%d\n",
474 pci_dev->name, config_addr, val, len);
477 #if defined(DEBUG_PCI) && 0
478 printf("pci_data_read: addr=%08x val=%08x len=%d\n",
484 /***********************************************************/
485 /* generic PCI irq support */
487 /* 0 <= irq_num <= 3. level must be 0 or 1 */
488 static void pci_set_irq(void *opaque, int irq_num, int level)
490 PCIDevice *pci_dev = (PCIDevice *)opaque;
494 change = level - pci_dev->irq_state[irq_num];
498 pci_dev->irq_state[irq_num] = level;
501 irq_num = bus->map_irq(pci_dev, irq_num);
504 pci_dev = bus->parent_dev;
506 bus->irq_count[irq_num] += change;
507 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
510 /***********************************************************/
511 /* monitor info on PCI */
518 static pci_class_desc pci_class_descriptions[] =
520 { 0x0100, "SCSI controller"},
521 { 0x0101, "IDE controller"},
522 { 0x0102, "Floppy controller"},
523 { 0x0103, "IPI controller"},
524 { 0x0104, "RAID controller"},
525 { 0x0106, "SATA controller"},
526 { 0x0107, "SAS controller"},
527 { 0x0180, "Storage controller"},
528 { 0x0200, "Ethernet controller"},
529 { 0x0201, "Token Ring controller"},
530 { 0x0202, "FDDI controller"},
531 { 0x0203, "ATM controller"},
532 { 0x0280, "Network controller"},
533 { 0x0300, "VGA controller"},
534 { 0x0301, "XGA controller"},
535 { 0x0302, "3D controller"},
536 { 0x0380, "Display controller"},
537 { 0x0400, "Video controller"},
538 { 0x0401, "Audio controller"},
540 { 0x0480, "Multimedia controller"},
541 { 0x0500, "RAM controller"},
542 { 0x0501, "Flash controller"},
543 { 0x0580, "Memory controller"},
544 { 0x0600, "Host bridge"},
545 { 0x0601, "ISA bridge"},
546 { 0x0602, "EISA bridge"},
547 { 0x0603, "MC bridge"},
548 { 0x0604, "PCI bridge"},
549 { 0x0605, "PCMCIA bridge"},
550 { 0x0606, "NUBUS bridge"},
551 { 0x0607, "CARDBUS bridge"},
552 { 0x0608, "RACEWAY bridge"},
554 { 0x0c03, "USB controller"},
558 static void pci_info_device(PCIDevice *d)
562 pci_class_desc *desc;
564 term_printf(" Bus %2d, device %3d, function %d:\n",
565 d->bus->bus_num, d->devfn >> 3, d->devfn & 7);
566 class = le16_to_cpu(*((uint16_t *)(d->config + PCI_CLASS_DEVICE)));
568 desc = pci_class_descriptions;
569 while (desc->desc && class != desc->class)
572 term_printf("%s", desc->desc);
574 term_printf("Class %04x", class);
576 term_printf(": PCI device %04x:%04x\n",
577 le16_to_cpu(*((uint16_t *)(d->config + PCI_VENDOR_ID))),
578 le16_to_cpu(*((uint16_t *)(d->config + PCI_DEVICE_ID))));
580 if (d->config[PCI_INTERRUPT_PIN] != 0) {
581 term_printf(" IRQ %d.\n", d->config[PCI_INTERRUPT_LINE]);
583 if (class == 0x0604) {
584 term_printf(" BUS %d.\n", d->config[0x19]);
586 for(i = 0;i < PCI_NUM_REGIONS; i++) {
587 r = &d->io_regions[i];
589 term_printf(" BAR%d: ", i);
590 if (r->type & PCI_ADDRESS_SPACE_IO) {
591 term_printf("I/O at 0x%04x [0x%04x].\n",
592 r->addr, r->addr + r->size - 1);
594 term_printf("32 bit memory at 0x%08x [0x%08x].\n",
595 r->addr, r->addr + r->size - 1);
599 if (class == 0x0604 && d->config[0x19] != 0) {
600 pci_for_each_device(d->config[0x19], pci_info_device);
604 void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d))
606 PCIBus *bus = first_bus;
610 while (bus && bus->bus_num != bus_num)
613 for(devfn = 0; devfn < 256; devfn++) {
614 d = bus->devices[devfn];
623 pci_for_each_device(0, pci_info_device);
626 /* Initialize a PCI NIC. */
627 void pci_nic_init(PCIBus *bus, NICInfo *nd, int devfn)
629 if (strcmp(nd->model, "ne2k_pci") == 0) {
630 pci_ne2000_init(bus, nd, devfn);
631 } else if (strcmp(nd->model, "i82551") == 0) {
632 pci_i82551_init(bus, nd, devfn);
633 } else if (strcmp(nd->model, "i82557b") == 0) {
634 pci_i82557b_init(bus, nd, devfn);
635 } else if (strcmp(nd->model, "i82559er") == 0) {
636 pci_i82559er_init(bus, nd, devfn);
637 } else if (strcmp(nd->model, "rtl8139") == 0) {
638 pci_rtl8139_init(bus, nd, devfn);
639 } else if (strcmp(nd->model, "e1000") == 0) {
640 pci_e1000_init(bus, nd, devfn);
641 } else if (strcmp(nd->model, "pcnet") == 0) {
642 pci_pcnet_init(bus, nd, devfn);
643 } else if (strcmp(nd->model, "?") == 0) {
644 fprintf(stderr, "qemu: Supported PCI NICs: i82551 i82557b i82559er"
645 " ne2k_pci pcnet rtl8139 e1000\n");
648 fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);
658 static void pci_bridge_write_config(PCIDevice *d,
659 uint32_t address, uint32_t val, int len)
661 PCIBridge *s = (PCIBridge *)d;
663 if (address == 0x19 || (address == 0x18 && len > 1)) {
665 s->bus->bus_num = val & 0xff;
667 s->bus->bus_num = (val >> 8) & 0xff;
668 #if defined(DEBUG_PCI)
669 printf ("pci-bridge: %s: Assigned bus %d\n", d->name, s->bus->bus_num);
672 pci_default_write_config(d, address, val, len);
675 PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint32_t id,
676 pci_map_irq_fn map_irq, const char *name)
679 s = (PCIBridge *)pci_register_device(bus, name, sizeof(PCIBridge),
680 devfn, NULL, pci_bridge_write_config);
681 s->dev.config[0x00] = id >> 16;
682 s->dev.config[0x01] = id >> 24;
683 s->dev.config[0x02] = id; // device_id
684 s->dev.config[0x03] = id >> 8;
685 s->dev.config[0x04] = 0x06; // command = bus master, pci mem
686 s->dev.config[0x05] = 0x00;
687 s->dev.config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
688 s->dev.config[0x07] = 0x00; // status = fast devsel
689 s->dev.config[0x08] = 0x00; // revision
690 s->dev.config[0x09] = 0x00; // programming i/f
691 s->dev.config[0x0A] = 0x04; // class_sub = PCI to PCI bridge
692 s->dev.config[0x0B] = 0x06; // class_base = PCI_bridge
693 s->dev.config[0x0D] = 0x10; // latency_timer
694 s->dev.config[0x0E] = 0x81; // header_type
695 s->dev.config[0x1E] = 0xa0; // secondary status
697 s->bus = pci_register_secondary_bus(&s->dev, map_irq);