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
31 pci_set_irq_fn set_irq;
32 pci_map_irq_fn map_irq;
33 uint32_t config_reg; /* XXX: suppress */
35 SetIRQFunc *low_set_irq;
37 PCIDevice *devices[256];
38 PCIDevice *parent_dev;
40 /* The bus IRQ state is the logical OR of the connected devices.
41 Keep a count of the number of devices with raised IRQs. */
45 static void pci_update_mappings(PCIDevice *d);
46 static void pci_set_irq(void *opaque, int irq_num, int level);
48 target_phys_addr_t pci_mem_base;
49 static int pci_irq_index;
50 static PCIBus *first_bus;
52 PCIBus *pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
53 qemu_irq *pic, int devfn_min, int nirq)
56 bus = qemu_mallocz(sizeof(PCIBus) + (nirq * sizeof(int)));
57 bus->set_irq = set_irq;
58 bus->map_irq = map_irq;
59 bus->irq_opaque = pic;
60 bus->devfn_min = devfn_min;
65 PCIBus *pci_register_secondary_bus(PCIDevice *dev, pci_map_irq_fn map_irq)
68 bus = qemu_mallocz(sizeof(PCIBus));
69 bus->map_irq = map_irq;
70 bus->parent_dev = dev;
71 bus->next = dev->bus->next;
76 int pci_bus_num(PCIBus *s)
81 void pci_device_save(PCIDevice *s, QEMUFile *f)
83 qemu_put_be32(f, 1); /* PCI device version */
84 qemu_put_buffer(f, s->config, 256);
87 int pci_device_load(PCIDevice *s, QEMUFile *f)
90 version_id = qemu_get_be32(f);
93 qemu_get_buffer(f, s->config, 256);
94 pci_update_mappings(s);
98 /* -1 for devfn means auto assign */
99 PCIDevice *pci_register_device(PCIBus *bus, const char *name,
100 int instance_size, int devfn,
101 PCIConfigReadFunc *config_read,
102 PCIConfigWriteFunc *config_write)
106 if (pci_irq_index >= PCI_DEVICES_MAX)
110 for(devfn = bus->devfn_min ; devfn < 256; devfn += 8) {
111 if (!bus->devices[devfn])
117 pci_dev = qemu_mallocz(instance_size);
121 pci_dev->devfn = devfn;
122 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
123 memset(pci_dev->irq_state, 0, sizeof(pci_dev->irq_state));
126 config_read = pci_default_read_config;
128 config_write = pci_default_write_config;
129 pci_dev->config_read = config_read;
130 pci_dev->config_write = config_write;
131 pci_dev->irq_index = pci_irq_index++;
132 bus->devices[devfn] = pci_dev;
133 pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, 4);
137 void pci_register_io_region(PCIDevice *pci_dev, int region_num,
138 uint32_t size, int type,
139 PCIMapIORegionFunc *map_func)
144 if ((unsigned int)region_num >= PCI_NUM_REGIONS)
146 r = &pci_dev->io_regions[region_num];
150 r->map_func = map_func;
151 if (region_num == PCI_ROM_SLOT) {
154 addr = 0x10 + region_num * 4;
156 *(uint32_t *)(pci_dev->config + addr) = cpu_to_le32(type);
159 target_phys_addr_t pci_to_cpu_addr(target_phys_addr_t addr)
161 return addr + pci_mem_base;
164 static void pci_update_mappings(PCIDevice *d)
168 uint32_t last_addr, new_addr, config_ofs;
170 cmd = le16_to_cpu(*(uint16_t *)(d->config + PCI_COMMAND));
171 for(i = 0; i < PCI_NUM_REGIONS; i++) {
172 r = &d->io_regions[i];
173 if (i == PCI_ROM_SLOT) {
176 config_ofs = 0x10 + i * 4;
179 if (r->type & PCI_ADDRESS_SPACE_IO) {
180 if (cmd & PCI_COMMAND_IO) {
181 new_addr = le32_to_cpu(*(uint32_t *)(d->config +
183 new_addr = new_addr & ~(r->size - 1);
184 last_addr = new_addr + r->size - 1;
185 /* NOTE: we have only 64K ioports on PC */
186 if (last_addr <= new_addr || new_addr == 0 ||
187 last_addr >= 0x10000) {
194 if (cmd & PCI_COMMAND_MEMORY) {
195 new_addr = le32_to_cpu(*(uint32_t *)(d->config +
197 /* the ROM slot has a specific enable bit */
198 if (i == PCI_ROM_SLOT && !(new_addr & 1))
200 new_addr = new_addr & ~(r->size - 1);
201 last_addr = new_addr + r->size - 1;
202 /* NOTE: we do not support wrapping */
203 /* XXX: as we cannot support really dynamic
204 mappings, we handle specific values as invalid
206 if (last_addr <= new_addr || new_addr == 0 ||
215 /* now do the real mapping */
216 if (new_addr != r->addr) {
218 if (r->type & PCI_ADDRESS_SPACE_IO) {
220 /* NOTE: specific hack for IDE in PC case:
221 only one byte must be mapped. */
222 class = d->config[0x0a] | (d->config[0x0b] << 8);
223 if (class == 0x0101 && r->size == 4) {
224 isa_unassign_ioport(r->addr + 2, 1);
226 isa_unassign_ioport(r->addr, r->size);
229 cpu_register_physical_memory(pci_to_cpu_addr(r->addr),
236 r->map_func(d, i, r->addr, r->size, r->type);
243 uint32_t pci_default_read_config(PCIDevice *d,
244 uint32_t address, int len)
251 if (address <= 0xfc) {
252 val = le32_to_cpu(*(uint32_t *)(d->config + address));
257 if (address <= 0xfe) {
258 val = le16_to_cpu(*(uint16_t *)(d->config + address));
263 val = d->config[address];
269 void pci_default_write_config(PCIDevice *d,
270 uint32_t address, uint32_t val, int len)
275 if (len == 4 && ((address >= 0x10 && address < 0x10 + 4 * 6) ||
276 (address >= 0x30 && address < 0x34))) {
280 if ( address >= 0x30 ) {
283 reg = (address - 0x10) >> 2;
285 r = &d->io_regions[reg];
288 /* compute the stored value */
289 if (reg == PCI_ROM_SLOT) {
290 /* keep ROM enable bit */
291 val &= (~(r->size - 1)) | 1;
293 val &= ~(r->size - 1);
296 *(uint32_t *)(d->config + address) = cpu_to_le32(val);
297 pci_update_mappings(d);
301 /* not efficient, but simple */
303 for(i = 0; i < len; i++) {
304 /* default read/write accesses */
305 switch(d->config[0x0e]) {
318 case 0x10 ... 0x27: /* base */
319 case 0x30 ... 0x33: /* rom */
340 case 0x38 ... 0x3b: /* rom */
351 d->config[addr] = val;
359 if (end > PCI_COMMAND && address < (PCI_COMMAND + 2)) {
360 /* if the command register is modified, we must modify the mappings */
361 pci_update_mappings(d);
365 void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
369 int config_addr, bus_num;
371 #if defined(DEBUG_PCI) && 0
372 printf("pci_data_write: addr=%08x val=%08x len=%d\n",
375 bus_num = (addr >> 16) & 0xff;
376 while (s && s->bus_num != bus_num)
380 pci_dev = s->devices[(addr >> 8) & 0xff];
383 config_addr = addr & 0xff;
384 #if defined(DEBUG_PCI)
385 printf("pci_config_write: %s: addr=%02x val=%08x len=%d\n",
386 pci_dev->name, config_addr, val, len);
388 pci_dev->config_write(pci_dev, config_addr, val, len);
391 uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
395 int config_addr, bus_num;
398 bus_num = (addr >> 16) & 0xff;
399 while (s && s->bus_num != bus_num)
403 pci_dev = s->devices[(addr >> 8) & 0xff];
420 config_addr = addr & 0xff;
421 val = pci_dev->config_read(pci_dev, config_addr, len);
422 #if defined(DEBUG_PCI)
423 printf("pci_config_read: %s: addr=%02x val=%08x len=%d\n",
424 pci_dev->name, config_addr, val, len);
427 #if defined(DEBUG_PCI) && 0
428 printf("pci_data_read: addr=%08x val=%08x len=%d\n",
434 /***********************************************************/
435 /* generic PCI irq support */
437 /* 0 <= irq_num <= 3. level must be 0 or 1 */
438 static void pci_set_irq(void *opaque, int irq_num, int level)
440 PCIDevice *pci_dev = (PCIDevice *)opaque;
444 change = level - pci_dev->irq_state[irq_num];
448 pci_dev->irq_state[irq_num] = level;
451 irq_num = bus->map_irq(pci_dev, irq_num);
454 pci_dev = bus->parent_dev;
456 bus->irq_count[irq_num] += change;
457 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
460 /***********************************************************/
461 /* monitor info on PCI */
468 static pci_class_desc pci_class_descriptions[] =
470 { 0x0100, "SCSI controller"},
471 { 0x0101, "IDE controller"},
472 { 0x0102, "Floppy controller"},
473 { 0x0103, "IPI controller"},
474 { 0x0104, "RAID controller"},
475 { 0x0106, "SATA controller"},
476 { 0x0107, "SAS controller"},
477 { 0x0180, "Storage controller"},
478 { 0x0200, "Ethernet controller"},
479 { 0x0201, "Token Ring controller"},
480 { 0x0202, "FDDI controller"},
481 { 0x0203, "ATM controller"},
482 { 0x0280, "Network controller"},
483 { 0x0300, "VGA controller"},
484 { 0x0301, "XGA controller"},
485 { 0x0302, "3D controller"},
486 { 0x0380, "Display controller"},
487 { 0x0400, "Video controller"},
488 { 0x0401, "Audio controller"},
490 { 0x0480, "Multimedia controller"},
491 { 0x0500, "RAM controller"},
492 { 0x0501, "Flash controller"},
493 { 0x0580, "Memory controller"},
494 { 0x0600, "Host bridge"},
495 { 0x0601, "ISA bridge"},
496 { 0x0602, "EISA bridge"},
497 { 0x0603, "MC bridge"},
498 { 0x0604, "PCI bridge"},
499 { 0x0605, "PCMCIA bridge"},
500 { 0x0606, "NUBUS bridge"},
501 { 0x0607, "CARDBUS bridge"},
502 { 0x0608, "RACEWAY bridge"},
504 { 0x0c03, "USB controller"},
508 static void pci_info_device(PCIDevice *d)
512 pci_class_desc *desc;
514 term_printf(" Bus %2d, device %3d, function %d:\n",
515 d->bus->bus_num, d->devfn >> 3, d->devfn & 7);
516 class = le16_to_cpu(*((uint16_t *)(d->config + PCI_CLASS_DEVICE)));
518 desc = pci_class_descriptions;
519 while (desc->desc && class != desc->class)
522 term_printf("%s", desc->desc);
524 term_printf("Class %04x", class);
526 term_printf(": PCI device %04x:%04x\n",
527 le16_to_cpu(*((uint16_t *)(d->config + PCI_VENDOR_ID))),
528 le16_to_cpu(*((uint16_t *)(d->config + PCI_DEVICE_ID))));
530 if (d->config[PCI_INTERRUPT_PIN] != 0) {
531 term_printf(" IRQ %d.\n", d->config[PCI_INTERRUPT_LINE]);
533 if (class == 0x0604) {
534 term_printf(" BUS %d.\n", d->config[0x19]);
536 for(i = 0;i < PCI_NUM_REGIONS; i++) {
537 r = &d->io_regions[i];
539 term_printf(" BAR%d: ", i);
540 if (r->type & PCI_ADDRESS_SPACE_IO) {
541 term_printf("I/O at 0x%04x [0x%04x].\n",
542 r->addr, r->addr + r->size - 1);
544 term_printf("32 bit memory at 0x%08x [0x%08x].\n",
545 r->addr, r->addr + r->size - 1);
549 if (class == 0x0604 && d->config[0x19] != 0) {
550 pci_for_each_device(d->config[0x19], pci_info_device);
554 void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d))
556 PCIBus *bus = first_bus;
560 while (bus && bus->bus_num != bus_num)
563 for(devfn = 0; devfn < 256; devfn++) {
564 d = bus->devices[devfn];
573 pci_for_each_device(0, pci_info_device);
576 /* Initialize a PCI NIC. */
577 void pci_nic_init(PCIBus *bus, NICInfo *nd, int devfn)
579 if (strcmp(nd->model, "ne2k_pci") == 0) {
580 pci_ne2000_init(bus, nd, devfn);
581 } else if (strcmp(nd->model, "i82551") == 0) {
582 pci_i82551_init(bus, nd, devfn);
583 } else if (strcmp(nd->model, "i82557b") == 0) {
584 pci_i82557b_init(bus, nd, devfn);
585 } else if (strcmp(nd->model, "i82559er") == 0) {
586 pci_i82559er_init(bus, nd, devfn);
587 } else if (strcmp(nd->model, "rtl8139") == 0) {
588 pci_rtl8139_init(bus, nd, devfn);
589 } else if (strcmp(nd->model, "pcnet") == 0) {
590 pci_pcnet_init(bus, nd, devfn);
592 fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);
602 void pci_bridge_write_config(PCIDevice *d,
603 uint32_t address, uint32_t val, int len)
605 PCIBridge *s = (PCIBridge *)d;
607 if (address == 0x19 || (address == 0x18 && len > 1)) {
609 s->bus->bus_num = val & 0xff;
611 s->bus->bus_num = (val >> 8) & 0xff;
612 #if defined(DEBUG_PCI)
613 printf ("pci-bridge: %s: Assigned bus %d\n", d->name, s->bus->bus_num);
616 pci_default_write_config(d, address, val, len);
619 PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint32_t id,
620 pci_map_irq_fn map_irq, const char *name)
623 s = (PCIBridge *)pci_register_device(bus, name, sizeof(PCIBridge),
624 devfn, NULL, pci_bridge_write_config);
625 s->dev.config[0x00] = id >> 16;
626 s->dev.config[0x01] = id >> 24;
627 s->dev.config[0x02] = id; // device_id
628 s->dev.config[0x03] = id >> 8;
629 s->dev.config[0x04] = 0x06; // command = bus master, pci mem
630 s->dev.config[0x05] = 0x00;
631 s->dev.config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
632 s->dev.config[0x07] = 0x00; // status = fast devsel
633 s->dev.config[0x08] = 0x00; // revision
634 s->dev.config[0x09] = 0x00; // programming i/f
635 s->dev.config[0x0A] = 0x04; // class_sub = PCI to PCI bridge
636 s->dev.config[0x0B] = 0x06; // class_base = PCI_bridge
637 s->dev.config[0x0D] = 0x10; // latency_timer
638 s->dev.config[0x0E] = 0x81; // header_type
639 s->dev.config[0x1E] = 0xa0; // secondary status
641 s->bus = pci_register_secondary_bus(&s->dev, map_irq);