1 // Initialize PCI devices (on emulators)
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2006 Fabrice Bellard
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "byteorder.h" // le64_to_cpu
9 #include "config.h" // CONFIG_*
10 #include "dev-q35.h" // Q35_HOST_BRIDGE_PCIEXBAR_ADDR
11 #include "dev-piix.h" // PIIX_*
12 #include "hw/ata.h" // PORT_ATA1_CMD_BASE
13 #include "hw/pci.h" // pci_config_readl
14 #include "hw/pci_ids.h" // PCI_VENDOR_ID_INTEL
15 #include "hw/pci_regs.h" // PCI_COMMAND
16 #include "list.h" // struct hlist_node
17 #include "malloc.h" // free
18 #include "memmap.h" // add_e820
19 #include "output.h" // dprintf
20 #include "paravirt.h" // RamSize
21 #include "romfile.h" // romfile_loadint
22 #include "string.h" // memset
23 #include "util.h" // pci_setup
24 #include "x86.h" // outb
26 #define PCI_DEVICE_MEM_MIN (1<<12) // 4k == page size
27 #define PCI_BRIDGE_MEM_MIN (1<<21) // 2M == hugepage size
28 #define PCI_BRIDGE_IO_MIN 0x1000 // mandated by pci bridge spec
30 static const char *region_type_name[] = {
31 [ PCI_REGION_TYPE_IO ] = "io",
32 [ PCI_REGION_TYPE_MEM ] = "mem",
33 [ PCI_REGION_TYPE_PREFMEM ] = "prefmem",
36 u64 pcimem_start = BUILD_PCIMEM_START;
37 u64 pcimem_end = BUILD_PCIMEM_END;
38 u64 pcimem64_start = BUILD_PCIMEM64_START;
39 u64 pcimem64_end = BUILD_PCIMEM64_END;
40 u64 pci_io_low_end = 0xa000;
42 struct pci_region_entry {
43 struct pci_device *dev;
48 enum pci_region_type type;
49 struct hlist_node node;
53 /* pci region assignments */
55 struct hlist_head list;
59 struct pci_region r[PCI_REGION_TYPE_COUNT];
60 struct pci_device *bus_dev;
63 static u32 pci_bar(struct pci_device *pci, int region_num)
65 if (region_num != PCI_ROM_SLOT) {
66 return PCI_BASE_ADDRESS_0 + region_num * 4;
69 #define PCI_HEADER_TYPE_MULTI_FUNCTION 0x80
70 u8 type = pci->header_type & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
71 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
75 pci_set_io_region_addr(struct pci_device *pci, int bar, u64 addr, int is64)
77 u32 ofs = pci_bar(pci, bar);
78 pci_config_writel(pci->bdf, ofs, addr);
80 pci_config_writel(pci->bdf, ofs + 4, addr >> 32);
84 /****************************************************************
86 ****************************************************************/
88 /* host irqs corresponding to PCI irqs A-D */
89 const u8 pci_irqs[4] = {
93 static int dummy_pci_slot_get_irq(struct pci_device *pci, int pin)
95 dprintf(1, "pci_slot_get_irq called with unknown routing\n");
97 return 0xff; /* PCI defined "unknown" or "no connection" for x86 */
100 static int (*pci_slot_get_irq)(struct pci_device *pci, int pin) =
101 dummy_pci_slot_get_irq;
103 // Return the global irq number corresponding to a host bus device irq pin.
104 static int piix_pci_slot_get_irq(struct pci_device *pci, int pin)
108 while (pci->parent != NULL) {
109 slot_addend += pci_bdf_to_dev(pci->bdf);
112 slot_addend += pci_bdf_to_dev(pci->bdf) - 1;
113 return pci_irqs[(pin - 1 + slot_addend) & 3];
116 static int mch_pci_slot_get_irq(struct pci_device *pci, int pin)
119 while (pci->parent != NULL) {
120 pin_addend += pci_bdf_to_dev(pci->bdf);
123 u8 slot = pci_bdf_to_dev(pci->bdf);
125 /* Slots 0-24 rotate slot:pin mapping similar to piix above, but
126 with a different starting index - see q35-acpi-dsdt.dsl */
127 return pci_irqs[(pin - 1 + pin_addend + slot) & 3];
128 /* Slots 25-31 all use LNKA mapping (or LNKE, but A:D = E:H) */
129 return pci_irqs[(pin - 1 + pin_addend) & 3];
132 /* PIIX3/PIIX4 PCI to ISA bridge */
133 static void piix_isa_bridge_setup(struct pci_device *pci, void *arg)
140 for (i = 0; i < 4; i++) {
142 /* set to trigger level */
143 elcr[irq >> 3] |= (1 << (irq & 7));
144 /* activate irq remapping in PIIX */
145 pci_config_writeb(pci->bdf, 0x60 + i, irq);
147 outb(elcr[0], PIIX_PORT_ELCR1);
148 outb(elcr[1], PIIX_PORT_ELCR2);
149 dprintf(1, "PIIX3/PIIX4 init: elcr=%02x %02x\n", elcr[0], elcr[1]);
152 /* ICH9 LPC PCI to ISA bridge */
153 /* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_LPC */
154 static void mch_isa_bridge_setup(struct pci_device *dev, void *arg)
163 for (i = 0; i < 4; i++) {
165 /* set to trigger level */
166 elcr[irq >> 3] |= (1 << (irq & 7));
168 /* activate irq remapping in LPC */
170 /* PIRQ[A-D] routing */
171 pci_config_writeb(bdf, ICH9_LPC_PIRQA_ROUT + i, irq);
172 /* PIRQ[E-H] routing */
173 pci_config_writeb(bdf, ICH9_LPC_PIRQE_ROUT + i, irq);
175 outb(elcr[0], ICH9_LPC_PORT_ELCR1);
176 outb(elcr[1], ICH9_LPC_PORT_ELCR2);
177 dprintf(1, "Q35 LPC init: elcr=%02x %02x\n", elcr[0], elcr[1]);
180 pci_config_writel(bdf, ICH9_LPC_PMBASE,
181 acpi_pm_base | ICH9_LPC_PMBASE_RTE);
183 /* acpi enable, SCI: IRQ9 000b = irq9*/
184 pci_config_writeb(bdf, ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_ACPI_EN);
186 acpi_pm1a_cnt = acpi_pm_base + 0x04;
187 pmtimer_setup(acpi_pm_base + 0x08);
190 static void storage_ide_setup(struct pci_device *pci, void *arg)
192 /* IDE: we map it as in ISA mode */
193 pci_set_io_region_addr(pci, 0, PORT_ATA1_CMD_BASE, 0);
194 pci_set_io_region_addr(pci, 1, PORT_ATA1_CTRL_BASE, 0);
195 pci_set_io_region_addr(pci, 2, PORT_ATA2_CMD_BASE, 0);
196 pci_set_io_region_addr(pci, 3, PORT_ATA2_CTRL_BASE, 0);
199 /* PIIX3/PIIX4 IDE */
200 static void piix_ide_setup(struct pci_device *pci, void *arg)
203 pci_config_writew(bdf, 0x40, 0x8000); // enable IDE0
204 pci_config_writew(bdf, 0x42, 0x8000); // enable IDE1
207 static void pic_ibm_setup(struct pci_device *pci, void *arg)
209 /* PIC, IBM, MPIC & MPIC2 */
210 pci_set_io_region_addr(pci, 0, 0x80800000 + 0x00040000, 0);
213 static void apple_macio_setup(struct pci_device *pci, void *arg)
216 pci_set_io_region_addr(pci, 0, 0x80800000, 0);
219 static void piix4_pm_config_setup(u16 bdf)
221 // acpi sci is hardwired to 9
222 pci_config_writeb(bdf, PCI_INTERRUPT_LINE, 9);
224 pci_config_writel(bdf, PIIX_PMBASE, acpi_pm_base | 1);
225 pci_config_writeb(bdf, PIIX_PMREGMISC, 0x01); /* enable PM io space */
226 pci_config_writel(bdf, PIIX_SMBHSTBASE, (acpi_pm_base + 0x100) | 1);
227 pci_config_writeb(bdf, PIIX_SMBHSTCFG, 0x09); /* enable SMBus io space */
230 static int PiixPmBDF = -1;
232 /* PIIX4 Power Management device (for ACPI) */
233 static void piix4_pm_setup(struct pci_device *pci, void *arg)
235 PiixPmBDF = pci->bdf;
236 piix4_pm_config_setup(pci->bdf);
238 acpi_pm1a_cnt = acpi_pm_base + 0x04;
239 pmtimer_setup(acpi_pm_base + 0x08);
243 /* PCI_VENDOR_ID_INTEL && PCI_DEVICE_ID_INTEL_ICH9_SMBUS */
244 static void ich9_smbus_setup(struct pci_device *dev, void *arg)
247 /* map smbus into io space */
248 pci_config_writel(bdf, ICH9_SMB_SMB_BASE,
249 (acpi_pm_base + 0x100) | PCI_BASE_ADDRESS_SPACE_IO);
252 pci_config_writeb(bdf, ICH9_SMB_HOSTC, ICH9_SMB_HOSTC_HST_EN);
255 static const struct pci_device_id pci_device_tbl[] = {
256 /* PIIX3/PIIX4 PCI to ISA bridge */
257 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0,
258 piix_isa_bridge_setup),
259 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
260 piix_isa_bridge_setup),
261 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_LPC,
262 mch_isa_bridge_setup),
265 PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1,
266 PCI_CLASS_STORAGE_IDE, piix_ide_setup),
267 PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
268 PCI_CLASS_STORAGE_IDE, piix_ide_setup),
269 PCI_DEVICE_CLASS(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE,
272 /* PIC, IBM, MIPC & MPIC2 */
273 PCI_DEVICE_CLASS(PCI_VENDOR_ID_IBM, 0x0046, PCI_CLASS_SYSTEM_PIC,
275 PCI_DEVICE_CLASS(PCI_VENDOR_ID_IBM, 0xFFFF, PCI_CLASS_SYSTEM_PIC,
278 /* PIIX4 Power Management device (for ACPI) */
279 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3,
281 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_SMBUS,
285 PCI_DEVICE_CLASS(PCI_VENDOR_ID_APPLE, 0x0017, 0xff00, apple_macio_setup),
286 PCI_DEVICE_CLASS(PCI_VENDOR_ID_APPLE, 0x0022, 0xff00, apple_macio_setup),
291 void pci_resume(void)
297 if (PiixPmBDF >= 0) {
298 piix4_pm_config_setup(PiixPmBDF);
302 static void pci_bios_init_device(struct pci_device *pci)
305 dprintf(1, "PCI: init bdf=%02x:%02x.%x id=%04x:%04x\n"
306 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf)
307 , pci->vendor, pci->device);
309 /* map the interrupt */
310 int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
312 pci_config_writeb(bdf, PCI_INTERRUPT_LINE, pci_slot_get_irq(pci, pin));
314 pci_init_device(pci_device_tbl, pci, NULL);
316 /* enable memory mappings */
317 pci_config_maskw(bdf, PCI_COMMAND, 0,
318 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_SERR);
321 static void pci_bios_init_devices(void)
323 struct pci_device *pci;
325 pci_bios_init_device(pci);
329 static void pci_enable_default_vga(void)
331 struct pci_device *pci;
334 if (is_pci_vga(pci)) {
335 dprintf(1, "PCI: Using %02x:%02x.%x for primary VGA\n",
336 pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
337 pci_bdf_to_fn(pci->bdf));
342 pci = pci_find_class(PCI_CLASS_DISPLAY_VGA);
344 dprintf(1, "PCI: No VGA devices found\n");
348 dprintf(1, "PCI: Enabling %02x:%02x.%x for primary VGA\n",
349 pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
350 pci_bdf_to_fn(pci->bdf));
352 pci_config_maskw(pci->bdf, PCI_COMMAND, 0,
353 PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
355 while (pci->parent) {
358 dprintf(1, "PCI: Setting VGA enable on bridge %02x:%02x.%x\n",
359 pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf),
360 pci_bdf_to_fn(pci->bdf));
362 pci_config_maskw(pci->bdf, PCI_BRIDGE_CONTROL, 0, PCI_BRIDGE_CTL_VGA);
363 pci_config_maskw(pci->bdf, PCI_COMMAND, 0,
364 PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
368 /****************************************************************
369 * Platform device initialization
370 ****************************************************************/
372 static void i440fx_mem_addr_setup(struct pci_device *dev, void *arg)
374 if (RamSize <= 0x80000000)
375 pcimem_start = 0x80000000;
376 else if (RamSize <= 0xc0000000)
377 pcimem_start = 0xc0000000;
379 pci_slot_get_irq = piix_pci_slot_get_irq;
382 static void mch_mem_addr_setup(struct pci_device *dev, void *arg)
384 u64 addr = Q35_HOST_BRIDGE_PCIEXBAR_ADDR;
385 u32 size = Q35_HOST_BRIDGE_PCIEXBAR_SIZE;
389 u32 upper = addr >> 32;
390 u32 lower = (addr & 0xffffffff) | Q35_HOST_BRIDGE_PCIEXBAREN;
391 pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR, 0);
392 pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR + 4, upper);
393 pci_config_writel(bdf, Q35_HOST_BRIDGE_PCIEXBAR, lower);
394 add_e820(addr, size, E820_RESERVED);
396 /* setup pci i/o window (above mmconfig) */
397 pcimem_start = addr + size;
399 pci_slot_get_irq = mch_pci_slot_get_irq;
401 /* setup io address space */
402 if (acpi_pm_base < 0x1000)
403 pci_io_low_end = 0x10000;
405 pci_io_low_end = acpi_pm_base;
408 static const struct pci_device_id pci_platform_tbl[] = {
409 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441,
410 i440fx_mem_addr_setup),
411 PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_Q35_MCH,
416 static void pci_bios_init_platform(void)
418 struct pci_device *pci;
420 pci_init_device(pci_platform_tbl, pci, NULL);
425 /****************************************************************
427 ****************************************************************/
430 pci_bios_init_bus_rec(int bus, u8 *pci_bus)
435 dprintf(1, "PCI: %s bus = 0x%x\n", __func__, bus);
437 /* prevent accidental access to unintended devices */
438 foreachbdf(bdf, bus) {
439 class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
440 if (class == PCI_CLASS_BRIDGE_PCI) {
441 pci_config_writeb(bdf, PCI_SECONDARY_BUS, 255);
442 pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, 0);
446 foreachbdf(bdf, bus) {
447 class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
448 if (class != PCI_CLASS_BRIDGE_PCI) {
451 dprintf(1, "PCI: %s bdf = 0x%x\n", __func__, bdf);
453 u8 pribus = pci_config_readb(bdf, PCI_PRIMARY_BUS);
455 dprintf(1, "PCI: primary bus = 0x%x -> 0x%x\n", pribus, bus);
456 pci_config_writeb(bdf, PCI_PRIMARY_BUS, bus);
458 dprintf(1, "PCI: primary bus = 0x%x\n", pribus);
461 u8 secbus = pci_config_readb(bdf, PCI_SECONDARY_BUS);
463 if (*pci_bus != secbus) {
464 dprintf(1, "PCI: secondary bus = 0x%x -> 0x%x\n",
467 pci_config_writeb(bdf, PCI_SECONDARY_BUS, secbus);
469 dprintf(1, "PCI: secondary bus = 0x%x\n", secbus);
472 /* set to max for access to all subordinate buses.
473 later set it to accurate value */
474 u8 subbus = pci_config_readb(bdf, PCI_SUBORDINATE_BUS);
475 pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, 255);
477 pci_bios_init_bus_rec(secbus, pci_bus);
479 if (subbus != *pci_bus) {
480 dprintf(1, "PCI: subordinate bus = 0x%x -> 0x%x\n",
484 dprintf(1, "PCI: subordinate bus = 0x%x\n", subbus);
486 pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, subbus);
491 pci_bios_init_bus(void)
493 u8 extraroots = romfile_loadint("etc/extra-pci-roots", 0);
496 pci_bios_init_bus_rec(0 /* host bus */, &pci_bus);
499 while (pci_bus < 0xff) {
501 pci_bios_init_bus_rec(pci_bus, &pci_bus);
507 /****************************************************************
509 ****************************************************************/
512 pci_bios_get_bar(struct pci_device *pci, int bar,
513 int *ptype, u64 *psize, int *pis64)
515 u32 ofs = pci_bar(pci, bar);
517 u32 old = pci_config_readl(bdf, ofs);
518 int is64 = 0, type = PCI_REGION_TYPE_MEM;
521 if (bar == PCI_ROM_SLOT) {
522 mask = PCI_ROM_ADDRESS_MASK;
523 pci_config_writel(bdf, ofs, mask);
525 if (old & PCI_BASE_ADDRESS_SPACE_IO) {
526 mask = PCI_BASE_ADDRESS_IO_MASK;
527 type = PCI_REGION_TYPE_IO;
529 mask = PCI_BASE_ADDRESS_MEM_MASK;
530 if (old & PCI_BASE_ADDRESS_MEM_PREFETCH)
531 type = PCI_REGION_TYPE_PREFMEM;
532 is64 = ((old & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
533 == PCI_BASE_ADDRESS_MEM_TYPE_64);
535 pci_config_writel(bdf, ofs, ~0);
537 u64 val = pci_config_readl(bdf, ofs);
538 pci_config_writel(bdf, ofs, old);
540 u32 hold = pci_config_readl(bdf, ofs + 4);
541 pci_config_writel(bdf, ofs + 4, ~0);
542 u32 high = pci_config_readl(bdf, ofs + 4);
543 pci_config_writel(bdf, ofs + 4, hold);
544 val |= ((u64)high << 32);
545 mask |= ((u64)0xffffffff << 32);
546 *psize = (~(val & mask)) + 1;
548 *psize = ((~(val & mask)) + 1) & 0xffffffff;
554 static int pci_bios_bridge_region_is64(struct pci_region *r,
555 struct pci_device *pci, int type)
557 if (type != PCI_REGION_TYPE_PREFMEM)
559 u32 pmem = pci_config_readl(pci->bdf, PCI_PREF_MEMORY_BASE);
561 pci_config_writel(pci->bdf, PCI_PREF_MEMORY_BASE, 0xfff0fff0);
562 pmem = pci_config_readl(pci->bdf, PCI_PREF_MEMORY_BASE);
563 pci_config_writel(pci->bdf, PCI_PREF_MEMORY_BASE, 0x0);
565 if ((pmem & PCI_PREF_RANGE_TYPE_MASK) != PCI_PREF_RANGE_TYPE_64)
567 struct pci_region_entry *entry;
568 hlist_for_each_entry(entry, &r->list, node) {
575 static u64 pci_region_align(struct pci_region *r)
577 struct pci_region_entry *entry;
578 hlist_for_each_entry(entry, &r->list, node) {
579 // The first entry in the sorted list has the largest alignment
585 static u64 pci_region_sum(struct pci_region *r)
588 struct pci_region_entry *entry;
589 hlist_for_each_entry(entry, &r->list, node) {
595 static void pci_region_migrate_64bit_entries(struct pci_region *from,
596 struct pci_region *to)
598 struct hlist_node *n, **last = &to->list.first;
599 struct pci_region_entry *entry;
600 hlist_for_each_entry_safe(entry, n, &from->list, node) {
603 if (entry->dev->class == PCI_CLASS_SERIAL_USB)
605 // Move from source list to destination list.
606 hlist_del(&entry->node);
607 hlist_add(&entry->node, last);
608 last = &entry->node.next;
612 static struct pci_region_entry *
613 pci_region_create_entry(struct pci_bus *bus, struct pci_device *dev,
614 int bar, u64 size, u64 align, int type, int is64)
616 struct pci_region_entry *entry = malloc_tmp(sizeof(*entry));
621 memset(entry, 0, sizeof(*entry));
625 entry->align = align;
628 // Insert into list in sorted order.
629 struct hlist_node **pprev;
630 struct pci_region_entry *pos;
631 hlist_for_each_entry_pprev(pos, pprev, &bus->r[type].list, node) {
632 if (pos->align < align || (pos->align == align && pos->size < size))
635 hlist_add(&entry->node, pprev);
639 static int pci_bus_hotplug_support(struct pci_bus *bus)
641 u8 pcie_cap = pci_find_capability(bus->bus_dev, PCI_CAP_ID_EXP);
645 u16 pcie_flags = pci_config_readw(bus->bus_dev->bdf,
646 pcie_cap + PCI_EXP_FLAGS);
647 u8 port_type = ((pcie_flags & PCI_EXP_FLAGS_TYPE) >>
648 (__builtin_ffs(PCI_EXP_FLAGS_TYPE) - 1));
649 u8 downstream_port = (port_type == PCI_EXP_TYPE_DOWNSTREAM) ||
650 (port_type == PCI_EXP_TYPE_ROOT_PORT);
652 * PCI Express SPEC, 7.8.2:
653 * Slot Implemented – When Set, this bit indicates that the Link
654 * HwInit associated with this Port is connected to a slot (as
655 * compared to being connected to a system-integrated device or
657 * This bit is valid for Downstream Ports. This bit is undefined
658 * for Upstream Ports.
660 u16 slot_implemented = pcie_flags & PCI_EXP_FLAGS_SLOT;
662 return downstream_port && slot_implemented;
665 shpc_cap = pci_find_capability(bus->bus_dev, PCI_CAP_ID_SHPC);
669 static int pci_bios_check_devices(struct pci_bus *busses)
671 dprintf(1, "PCI: check devices\n");
673 // Calculate resources needed for regular (non-bus) devices.
674 struct pci_device *pci;
676 if (pci->class == PCI_CLASS_BRIDGE_PCI)
677 busses[pci->secondary_bus].bus_dev = pci;
679 struct pci_bus *bus = &busses[pci_bdf_to_bus(pci->bdf)];
682 * Resources for all root busses go in busses[0]
686 for (i = 0; i < PCI_NUM_REGIONS; i++) {
687 if ((pci->class == PCI_CLASS_BRIDGE_PCI) &&
688 (i >= PCI_BRIDGE_NUM_REGIONS && i < PCI_ROM_SLOT))
692 pci_bios_get_bar(pci, i, &type, &size, &is64);
696 if (type != PCI_REGION_TYPE_IO && size < PCI_DEVICE_MEM_MIN)
697 size = PCI_DEVICE_MEM_MIN;
698 struct pci_region_entry *entry = pci_region_create_entry(
699 bus, pci, i, size, size, type, is64);
708 // Propagate required bus resources to parent busses.
710 for (secondary_bus=MaxPCIBus; secondary_bus>0; secondary_bus--) {
711 struct pci_bus *s = &busses[secondary_bus];
714 struct pci_bus *parent = &busses[pci_bdf_to_bus(s->bus_dev->bdf)];
715 if (!parent->bus_dev)
717 * Resources for all root busses go in busses[0]
721 int hotplug_support = pci_bus_hotplug_support(s);
722 for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
723 u64 align = (type == PCI_REGION_TYPE_IO) ?
724 PCI_BRIDGE_IO_MIN : PCI_BRIDGE_MEM_MIN;
725 if (!pci_bridge_has_region(s->bus_dev, type))
727 if (pci_region_align(&s->r[type]) > align)
728 align = pci_region_align(&s->r[type]);
729 u64 sum = pci_region_sum(&s->r[type]);
730 if (!sum && hotplug_support)
731 sum = align; /* reserve min size for hot-plug */
732 u64 size = ALIGN(sum, align);
733 int is64 = pci_bios_bridge_region_is64(&s->r[type],
735 // entry->bar is -1 if the entry represents a bridge region
736 struct pci_region_entry *entry = pci_region_create_entry(
737 parent, s->bus_dev, -1, size, align, type, is64);
740 dprintf(1, "PCI: secondary bus %d size %08llx type %s\n",
741 entry->dev->secondary_bus, size,
742 region_type_name[entry->type]);
749 /****************************************************************
751 ****************************************************************/
753 // Setup region bases (given the regions' size and alignment)
754 static int pci_bios_init_root_regions_io(struct pci_bus *bus)
757 * QEMU I/O address space usage:
758 * 0000 - 0fff legacy isa, pci config, pci root bus, ...
760 * a000 - afff hotplug (cpu, pci via acpi, i440fx/piix only)
761 * b000 - bfff power management (PORT_ACPI_PM_BASE)
762 * [ qemu 1.4+ implements pci config registers
763 * properly so guests can place the registers
764 * where they want, on older versions its fixed ]
765 * c000 - ffff free, traditionally used for pci io
767 struct pci_region *r_io = &bus->r[PCI_REGION_TYPE_IO];
768 u64 sum = pci_region_sum(r_io);
770 /* traditional region is big enougth, use it */
772 } else if (sum < pci_io_low_end - 0x1000) {
773 /* use the larger region at 0x1000 */
776 /* not enouth io address space -> error out */
779 dprintf(1, "PCI: IO: %4llx - %4llx\n", r_io->base, r_io->base + sum - 1);
783 static int pci_bios_init_root_regions_mem(struct pci_bus *bus)
785 struct pci_region *r_end = &bus->r[PCI_REGION_TYPE_PREFMEM];
786 struct pci_region *r_start = &bus->r[PCI_REGION_TYPE_MEM];
788 if (pci_region_align(r_start) < pci_region_align(r_end)) {
789 // Swap regions to improve alignment.
791 r_start = &bus->r[PCI_REGION_TYPE_PREFMEM];
793 u64 sum = pci_region_sum(r_end);
794 u64 align = pci_region_align(r_end);
795 r_end->base = ALIGN_DOWN((pcimem_end - sum), align);
796 sum = pci_region_sum(r_start);
797 align = pci_region_align(r_start);
798 r_start->base = ALIGN_DOWN((r_end->base - sum), align);
800 if ((r_start->base < pcimem_start) ||
801 (r_start->base > pcimem_end))
802 // Memory range requested is larger than available.
807 #define PCI_IO_SHIFT 8
808 #define PCI_MEMORY_SHIFT 16
809 #define PCI_PREF_MEMORY_SHIFT 16
812 pci_region_map_one_entry(struct pci_region_entry *entry, u64 addr)
814 u16 bdf = entry->dev->bdf;
815 if (entry->bar >= 0) {
816 dprintf(1, "PCI: map device bdf=%02x:%02x.%x"
817 " bar %d, addr %08llx, size %08llx [%s]\n",
818 pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf),
819 entry->bar, addr, entry->size, region_type_name[entry->type]);
821 pci_set_io_region_addr(entry->dev, entry->bar, addr, entry->is64);
825 u64 limit = addr + entry->size - 1;
826 if (entry->type == PCI_REGION_TYPE_IO) {
827 pci_config_writeb(bdf, PCI_IO_BASE, addr >> PCI_IO_SHIFT);
828 pci_config_writew(bdf, PCI_IO_BASE_UPPER16, 0);
829 pci_config_writeb(bdf, PCI_IO_LIMIT, limit >> PCI_IO_SHIFT);
830 pci_config_writew(bdf, PCI_IO_LIMIT_UPPER16, 0);
832 if (entry->type == PCI_REGION_TYPE_MEM) {
833 pci_config_writew(bdf, PCI_MEMORY_BASE, addr >> PCI_MEMORY_SHIFT);
834 pci_config_writew(bdf, PCI_MEMORY_LIMIT, limit >> PCI_MEMORY_SHIFT);
836 if (entry->type == PCI_REGION_TYPE_PREFMEM) {
837 pci_config_writew(bdf, PCI_PREF_MEMORY_BASE, addr >> PCI_PREF_MEMORY_SHIFT);
838 pci_config_writew(bdf, PCI_PREF_MEMORY_LIMIT, limit >> PCI_PREF_MEMORY_SHIFT);
839 pci_config_writel(bdf, PCI_PREF_BASE_UPPER32, addr >> 32);
840 pci_config_writel(bdf, PCI_PREF_LIMIT_UPPER32, limit >> 32);
844 static void pci_region_map_entries(struct pci_bus *busses, struct pci_region *r)
846 struct hlist_node *n;
847 struct pci_region_entry *entry;
848 hlist_for_each_entry_safe(entry, n, &r->list, node) {
850 r->base += entry->size;
851 if (entry->bar == -1)
852 // Update bus base address if entry is a bridge region
853 busses[entry->dev->secondary_bus].r[entry->type].base = addr;
854 pci_region_map_one_entry(entry, addr);
855 hlist_del(&entry->node);
860 static void pci_bios_map_devices(struct pci_bus *busses)
862 if (pci_bios_init_root_regions_io(busses))
863 panic("PCI: out of I/O address space\n");
865 dprintf(1, "PCI: 32: %016llx - %016llx\n", pcimem_start, pcimem_end);
866 if (pci_bios_init_root_regions_mem(busses)) {
867 struct pci_region r64_mem, r64_pref;
868 r64_mem.list.first = NULL;
869 r64_pref.list.first = NULL;
870 pci_region_migrate_64bit_entries(&busses[0].r[PCI_REGION_TYPE_MEM],
872 pci_region_migrate_64bit_entries(&busses[0].r[PCI_REGION_TYPE_PREFMEM],
875 if (pci_bios_init_root_regions_mem(busses))
876 panic("PCI: out of 32bit address space\n");
878 u64 sum_mem = pci_region_sum(&r64_mem);
879 u64 sum_pref = pci_region_sum(&r64_pref);
880 u64 align_mem = pci_region_align(&r64_mem);
881 u64 align_pref = pci_region_align(&r64_pref);
883 r64_mem.base = le64_to_cpu(romfile_loadint("etc/reserved-memory-end", 0));
884 if (r64_mem.base < 0x100000000LL + RamSizeOver4G)
885 r64_mem.base = 0x100000000LL + RamSizeOver4G;
886 r64_mem.base = ALIGN(r64_mem.base, align_mem);
887 r64_mem.base = ALIGN(r64_mem.base, (1LL<<30)); // 1G hugepage
888 r64_pref.base = r64_mem.base + sum_mem;
889 r64_pref.base = ALIGN(r64_pref.base, align_pref);
890 r64_pref.base = ALIGN(r64_pref.base, (1LL<<30)); // 1G hugepage
891 pcimem64_start = r64_mem.base;
892 pcimem64_end = r64_pref.base + sum_pref;
893 pcimem64_end = ALIGN(pcimem64_end, (1LL<<30)); // 1G hugepage
894 dprintf(1, "PCI: 64: %016llx - %016llx\n", pcimem64_start, pcimem64_end);
896 pci_region_map_entries(busses, &r64_mem);
897 pci_region_map_entries(busses, &r64_pref);
899 // no bars mapped high -> drop 64bit window (see dsdt)
902 // Map regions on each device.
904 for (bus = 0; bus<=MaxPCIBus; bus++) {
906 for (type = 0; type < PCI_REGION_TYPE_COUNT; type++)
907 pci_region_map_entries(busses, &busses[bus].r[type]);
912 /****************************************************************
914 ****************************************************************/
922 dprintf(3, "pci setup\n");
924 dprintf(1, "=== PCI bus & bridge init ===\n");
925 if (pci_probe_host() != 0) {
930 dprintf(1, "=== PCI device probing ===\n");
933 pcimem_start = RamSize;
934 pci_bios_init_platform();
936 dprintf(1, "=== PCI new allocation pass #1 ===\n");
937 struct pci_bus *busses = malloc_tmp(sizeof(*busses) * (MaxPCIBus + 1));
942 memset(busses, 0, sizeof(*busses) * (MaxPCIBus + 1));
943 if (pci_bios_check_devices(busses))
946 dprintf(1, "=== PCI new allocation pass #2 ===\n");
947 pci_bios_map_devices(busses);
949 pci_bios_init_devices();
953 pci_enable_default_vga();