--- /dev/null
+// Initialize PCI devices (on emulators)
+//
+// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2006 Fabrice Bellard
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "util.h" // dprintf
+#include "pci.h" // pci_config_readl
+#include "biosvar.h" // GET_EBDA
+#include "pci_ids.h" // PCI_VENDOR_ID_INTEL
+#include "pci_regs.h" // PCI_COMMAND
+#include "xen.h" // usingXen
+
+#define PCI_IO_INDEX_SHIFT 2
+#define PCI_MEM_INDEX_SHIFT 12
+
+#define PCI_BRIDGE_IO_MIN 0x1000
+#define PCI_BRIDGE_MEM_MIN 0x100000
+
+enum pci_region_type {
+ PCI_REGION_TYPE_IO,
+ PCI_REGION_TYPE_MEM,
+ PCI_REGION_TYPE_PREFMEM,
+ PCI_REGION_TYPE_COUNT,
+};
+
+static const char *region_type_name[] = {
+ [ PCI_REGION_TYPE_IO ] = "io",
+ [ PCI_REGION_TYPE_MEM ] = "mem",
+ [ PCI_REGION_TYPE_PREFMEM ] = "prefmem",
+};
+
+static struct pci_bus {
+ struct {
+ /* pci region stats */
+ u32 count[32 - PCI_MEM_INDEX_SHIFT];
+ u32 sum, max;
+ /* seconday bus region sizes */
+ u32 size;
+ /* pci region assignments */
+ u32 bases[32 - PCI_MEM_INDEX_SHIFT];
+ u32 base;
+ } r[PCI_REGION_TYPE_COUNT];
+} *busses;
+static int busses_count;
+
+static void pci_bios_init_device_in_bus(int bus);
+static void pci_bios_check_device_in_bus(int bus);
+static void pci_bios_init_bus_bases(struct pci_bus *bus);
+static void pci_bios_map_device_in_bus(int bus);
+
+static int pci_size_to_index(u32 size, enum pci_region_type type)
+{
+ int index = __fls(size);
+ int shift = (type == PCI_REGION_TYPE_IO) ?
+ PCI_IO_INDEX_SHIFT : PCI_MEM_INDEX_SHIFT;
+
+ if (index < shift)
+ index = shift;
+ index -= shift;
+ return index;
+}
+
+static u32 pci_index_to_size(int index, enum pci_region_type type)
+{
+ int shift = (type == PCI_REGION_TYPE_IO) ?
+ PCI_IO_INDEX_SHIFT : PCI_MEM_INDEX_SHIFT;
+
+ return 0x1 << (index + shift);
+}
+
+static enum pci_region_type pci_addr_to_type(u32 addr)
+{
+ if (addr & PCI_BASE_ADDRESS_SPACE_IO)
+ return PCI_REGION_TYPE_IO;
+ if (addr & PCI_BASE_ADDRESS_MEM_PREFETCH)
+ return PCI_REGION_TYPE_PREFMEM;
+ return PCI_REGION_TYPE_MEM;
+}
+
+static u32 pci_size_roundup(u32 size)
+{
+ int index = __fls(size-1)+1;
+ return 0x1 << index;
+}
+
+/* host irqs corresponding to PCI irqs A-D */
+const u8 pci_irqs[4] = {
+ 10, 10, 11, 11
+};
+
+static u32 pci_bar(u16 bdf, int region_num)
+{
+ if (region_num != PCI_ROM_SLOT) {
+ return PCI_BASE_ADDRESS_0 + region_num * 4;
+ }
+
+#define PCI_HEADER_TYPE_MULTI_FUNCTION 0x80
+ u8 type = pci_config_readb(bdf, PCI_HEADER_TYPE);
+ type &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
+ return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
+}
+
+static void pci_set_io_region_addr(u16 bdf, int region_num, u32 addr)
+{
+ u32 ofs;
+
+ ofs = pci_bar(bdf, region_num);
+
+ pci_config_writel(bdf, ofs, addr);
+}
+
+/* return the global irq number corresponding to a given device irq
+ pin. We could also use the bus number to have a more precise
+ mapping. */
+static int pci_slot_get_pirq(u16 bdf, int irq_num)
+{
+ int slot_addend = pci_bdf_to_dev(bdf) - 1;
+ return (irq_num + slot_addend) & 3;
+}
+
+/* PIIX3/PIIX4 PCI to ISA bridge */
+static void piix_isa_bridge_init(struct pci_device *pci, void *arg)
+{
+ int i, irq;
+ u8 elcr[2];
+
+ elcr[0] = 0x00;
+ elcr[1] = 0x00;
+ for (i = 0; i < 4; i++) {
+ irq = pci_irqs[i];
+ /* set to trigger level */
+ elcr[irq >> 3] |= (1 << (irq & 7));
+ /* activate irq remapping in PIIX */
+ pci_config_writeb(pci->bdf, 0x60 + i, irq);
+ }
+ outb(elcr[0], 0x4d0);
+ outb(elcr[1], 0x4d1);
+ dprintf(1, "PIIX3/PIIX4 init: elcr=%02x %02x\n", elcr[0], elcr[1]);
+}
+
+static const struct pci_device_id pci_isa_bridge_tbl[] = {
+ /* PIIX3/PIIX4 PCI to ISA bridge */
+ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0,
+ piix_isa_bridge_init),
+ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
+ piix_isa_bridge_init),
+
+ PCI_DEVICE_END
+};
+
+#define PCI_IO_ALIGN 4096
+#define PCI_IO_SHIFT 8
+#define PCI_MEMORY_ALIGN (1UL << 20)
+#define PCI_MEMORY_SHIFT 16
+#define PCI_PREF_MEMORY_ALIGN (1UL << 20)
+#define PCI_PREF_MEMORY_SHIFT 16
+
+static void storage_ide_init(struct pci_device *pci, void *arg)
+{
+ u16 bdf = pci->bdf;
+ /* IDE: we map it as in ISA mode */
+ pci_set_io_region_addr(bdf, 0, PORT_ATA1_CMD_BASE);
+ pci_set_io_region_addr(bdf, 1, PORT_ATA1_CTRL_BASE);
+ pci_set_io_region_addr(bdf, 2, PORT_ATA2_CMD_BASE);
+ pci_set_io_region_addr(bdf, 3, PORT_ATA2_CTRL_BASE);
+}
+
+/* PIIX3/PIIX4 IDE */
+static void piix_ide_init(struct pci_device *pci, void *arg)
+{
+ u16 bdf = pci->bdf;
+ pci_config_writew(bdf, 0x40, 0x8000); // enable IDE0
+ pci_config_writew(bdf, 0x42, 0x8000); // enable IDE1
+}
+
+static void pic_ibm_init(struct pci_device *pci, void *arg)
+{
+ /* PIC, IBM, MPIC & MPIC2 */
+ pci_set_io_region_addr(pci->bdf, 0, 0x80800000 + 0x00040000);
+}
+
+static void apple_macio_init(struct pci_device *pci, void *arg)
+{
+ /* macio bridge */
+ pci_set_io_region_addr(pci->bdf, 0, 0x80800000);
+}
+
+static const struct pci_device_id pci_class_tbl[] = {
+ /* STORAGE IDE */
+ PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1,
+ PCI_CLASS_STORAGE_IDE, piix_ide_init),
+ PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
+ PCI_CLASS_STORAGE_IDE, piix_ide_init),
+ PCI_DEVICE_CLASS(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE,
+ storage_ide_init),
+
+ /* PIC, IBM, MIPC & MPIC2 */
+ PCI_DEVICE_CLASS(PCI_VENDOR_ID_IBM, 0x0046, PCI_CLASS_SYSTEM_PIC,
+ pic_ibm_init),
+ PCI_DEVICE_CLASS(PCI_VENDOR_ID_IBM, 0xFFFF, PCI_CLASS_SYSTEM_PIC,
+ pic_ibm_init),
+
+ /* 0xff00 */
+ PCI_DEVICE_CLASS(PCI_VENDOR_ID_APPLE, 0x0017, 0xff00, apple_macio_init),
+ PCI_DEVICE_CLASS(PCI_VENDOR_ID_APPLE, 0x0022, 0xff00, apple_macio_init),
+
+ PCI_DEVICE_END,
+};
+
+/* PIIX4 Power Management device (for ACPI) */
+static void piix4_pm_init(struct pci_device *pci, void *arg)
+{
+ u16 bdf = pci->bdf;
+ // acpi sci is hardwired to 9
+ pci_config_writeb(bdf, PCI_INTERRUPT_LINE, 9);
+
+ pci_config_writel(bdf, 0x40, PORT_ACPI_PM_BASE | 1);
+ pci_config_writeb(bdf, 0x80, 0x01); /* enable PM io space */
+ pci_config_writel(bdf, 0x90, PORT_SMB_BASE | 1);
+ pci_config_writeb(bdf, 0xd2, 0x09); /* enable SMBus io space */
+}
+
+static const struct pci_device_id pci_device_tbl[] = {
+ /* PIIX4 Power Management device (for ACPI) */
+ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3,
+ piix4_pm_init),
+
+ PCI_DEVICE_END,
+};
+
+static void pci_bios_init_device(struct pci_device *pci)
+{
+ u16 bdf = pci->bdf;
+ int pin, pic_irq;
+
+ dprintf(1, "PCI: bus=%d devfn=0x%02x: vendor_id=0x%04x device_id=0x%04x\n"
+ , pci_bdf_to_bus(bdf), pci_bdf_to_devfn(bdf)
+ , pci->vendor, pci->device);
+ pci_init_device(pci_class_tbl, pci, NULL);
+
+ /* enable memory mappings */
+ pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
+
+ /* map the interrupt */
+ pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
+ if (pin != 0) {
+ pin = pci_slot_get_pirq(bdf, pin - 1);
+ pic_irq = pci_irqs[pin];
+ pci_config_writeb(bdf, PCI_INTERRUPT_LINE, pic_irq);
+ }
+
+ pci_init_device(pci_device_tbl, pci, NULL);
+}
+
+static void pci_bios_init_device_in_bus(int bus)
+{
+ struct pci_device *pci;
+ foreachpci(pci) {
+ u8 pci_bus = pci_bdf_to_bus(pci->bdf);
+ if (pci_bus < bus)
+ continue;
+ if (pci_bus > bus)
+ break;
+ pci_bios_init_device(pci);
+ }
+}
+
+static void
+pci_bios_init_bus_rec(int bus, u8 *pci_bus)
+{
+ int bdf;
+ u16 class;
+
+ dprintf(1, "PCI: %s bus = 0x%x\n", __func__, bus);
+
+ /* prevent accidental access to unintended devices */
+ foreachbdf(bdf, bus) {
+ class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
+ if (class == PCI_CLASS_BRIDGE_PCI) {
+ pci_config_writeb(bdf, PCI_SECONDARY_BUS, 255);
+ pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, 0);
+ }
+ }
+
+ foreachbdf(bdf, bus) {
+ class = pci_config_readw(bdf, PCI_CLASS_DEVICE);
+ if (class != PCI_CLASS_BRIDGE_PCI) {
+ continue;
+ }
+ dprintf(1, "PCI: %s bdf = 0x%x\n", __func__, bdf);
+
+ u8 pribus = pci_config_readb(bdf, PCI_PRIMARY_BUS);
+ if (pribus != bus) {
+ dprintf(1, "PCI: primary bus = 0x%x -> 0x%x\n", pribus, bus);
+ pci_config_writeb(bdf, PCI_PRIMARY_BUS, bus);
+ } else {
+ dprintf(1, "PCI: primary bus = 0x%x\n", pribus);
+ }
+
+ u8 secbus = pci_config_readb(bdf, PCI_SECONDARY_BUS);
+ (*pci_bus)++;
+ if (*pci_bus != secbus) {
+ dprintf(1, "PCI: secondary bus = 0x%x -> 0x%x\n",
+ secbus, *pci_bus);
+ secbus = *pci_bus;
+ pci_config_writeb(bdf, PCI_SECONDARY_BUS, secbus);
+ } else {
+ dprintf(1, "PCI: secondary bus = 0x%x\n", secbus);
+ }
+
+ /* set to max for access to all subordinate buses.
+ later set it to accurate value */
+ u8 subbus = pci_config_readb(bdf, PCI_SUBORDINATE_BUS);
+ pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, 255);
+
+ pci_bios_init_bus_rec(secbus, pci_bus);
+
+ if (subbus != *pci_bus) {
+ dprintf(1, "PCI: subordinate bus = 0x%x -> 0x%x\n",
+ subbus, *pci_bus);
+ subbus = *pci_bus;
+ } else {
+ dprintf(1, "PCI: subordinate bus = 0x%x\n", subbus);
+ }
+ pci_config_writeb(bdf, PCI_SUBORDINATE_BUS, subbus);
+ }
+}
+
+static void
+pci_bios_init_bus(void)
+{
+ u8 pci_bus = 0;
+ pci_bios_init_bus_rec(0 /* host bus */, &pci_bus);
+ busses_count = pci_bus + 1;
+}
+
+static void pci_bios_bus_get_bar(struct pci_bus *bus, int bdf, int bar,
+ u32 *val, u32 *size)
+{
+ u32 ofs = pci_bar(bdf, bar);
+ u32 old = pci_config_readl(bdf, ofs);
+ u32 mask;
+
+ if (bar == PCI_ROM_SLOT) {
+ mask = PCI_ROM_ADDRESS_MASK;
+ pci_config_writel(bdf, ofs, mask);
+ } else {
+ if (old & PCI_BASE_ADDRESS_SPACE_IO)
+ mask = PCI_BASE_ADDRESS_IO_MASK;
+ else
+ mask = PCI_BASE_ADDRESS_MEM_MASK;
+ pci_config_writel(bdf, ofs, ~0);
+ }
+ *val = pci_config_readl(bdf, ofs);
+ pci_config_writel(bdf, ofs, old);
+ *size = (~(*val & mask)) + 1;
+}
+
+static void pci_bios_bus_reserve(struct pci_bus *bus, int type, u32 size)
+{
+ u32 index;
+
+ index = pci_size_to_index(size, type);
+ size = pci_index_to_size(index, type);
+ bus->r[type].count[index]++;
+ bus->r[type].sum += size;
+ if (bus->r[type].max < size)
+ bus->r[type].max = size;
+}
+
+static u32 pci_bios_bus_get_addr(struct pci_bus *bus, int type, u32 size)
+{
+ u32 index, addr;
+
+ index = pci_size_to_index(size, type);
+ addr = bus->r[type].bases[index];
+ bus->r[type].bases[index] += pci_index_to_size(index, type);
+ return addr;
+}
+
+static void pci_bios_check_device(struct pci_bus *bus, struct pci_device *dev)
+{
+ u16 bdf = dev->bdf;
+ u32 limit;
+ int i,type;
+
+ if (dev->class == PCI_CLASS_BRIDGE_PCI) {
+ if (dev->secondary_bus >= busses_count) {
+ /* should never trigger */
+ dprintf(1, "PCI: bus count too small (%d), skipping bus #%d\n",
+ busses_count, dev->secondary_bus);
+ return;
+ }
+ struct pci_bus *s = busses + dev->secondary_bus;
+ pci_bios_check_device_in_bus(dev->secondary_bus);
+ for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
+ limit = (type == PCI_REGION_TYPE_IO) ?
+ PCI_BRIDGE_IO_MIN : PCI_BRIDGE_MEM_MIN;
+ s->r[type].size = s->r[type].sum;
+ if (s->r[type].size < limit)
+ s->r[type].size = limit;
+ s->r[type].size = pci_size_roundup(s->r[type].size);
+ pci_bios_bus_reserve(bus, type, s->r[type].size);
+ }
+ dprintf(1, "PCI: secondary bus %d sizes: io %x, mem %x, prefmem %x\n",
+ dev->secondary_bus,
+ s->r[PCI_REGION_TYPE_IO].size,
+ s->r[PCI_REGION_TYPE_MEM].size,
+ s->r[PCI_REGION_TYPE_PREFMEM].size);
+ return;
+ }
+
+ for (i = 0; i < PCI_NUM_REGIONS; i++) {
+ u32 val, size;
+ pci_bios_bus_get_bar(bus, bdf, i, &val, &size);
+ if (val == 0) {
+ continue;
+ }
+ pci_bios_bus_reserve(bus, pci_addr_to_type(val), size);
+ dev->bars[i].addr = val;
+ dev->bars[i].size = size;
+ dev->bars[i].is64 = (!(val & PCI_BASE_ADDRESS_SPACE_IO) &&
+ (val & PCI_BASE_ADDRESS_MEM_TYPE_MASK) == PCI_BASE_ADDRESS_MEM_TYPE_64);
+
+ if (dev->bars[i].is64) {
+ i++;
+ }
+ }
+}
+
+static void pci_bios_map_device(struct pci_bus *bus, struct pci_device *dev)
+{
+ u16 bdf = dev->bdf;
+ int type, i;
+
+ if (dev->class == PCI_CLASS_BRIDGE_PCI) {
+ if (dev->secondary_bus >= busses_count) {
+ return;
+ }
+ struct pci_bus *s = busses + dev->secondary_bus;
+ u32 base, limit;
+
+ for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
+ s->r[type].base = pci_bios_bus_get_addr(bus, type, s->r[type].size);
+ }
+ dprintf(1, "PCI: init bases bus %d (secondary)\n", dev->secondary_bus);
+ pci_bios_init_bus_bases(s);
+
+ base = s->r[PCI_REGION_TYPE_IO].base;
+ limit = base + s->r[PCI_REGION_TYPE_IO].size - 1;
+ pci_config_writeb(bdf, PCI_IO_BASE, base >> PCI_IO_SHIFT);
+ pci_config_writew(bdf, PCI_IO_BASE_UPPER16, 0);
+ pci_config_writeb(bdf, PCI_IO_LIMIT, limit >> PCI_IO_SHIFT);
+ pci_config_writew(bdf, PCI_IO_LIMIT_UPPER16, 0);
+
+ base = s->r[PCI_REGION_TYPE_MEM].base;
+ limit = base + s->r[PCI_REGION_TYPE_MEM].size - 1;
+ pci_config_writew(bdf, PCI_MEMORY_BASE, base >> PCI_MEMORY_SHIFT);
+ pci_config_writew(bdf, PCI_MEMORY_LIMIT, limit >> PCI_MEMORY_SHIFT);
+
+ base = s->r[PCI_REGION_TYPE_PREFMEM].base;
+ limit = base + s->r[PCI_REGION_TYPE_PREFMEM].size - 1;
+ pci_config_writew(bdf, PCI_PREF_MEMORY_BASE, base >> PCI_PREF_MEMORY_SHIFT);
+ pci_config_writew(bdf, PCI_PREF_MEMORY_LIMIT, limit >> PCI_PREF_MEMORY_SHIFT);
+ pci_config_writel(bdf, PCI_PREF_BASE_UPPER32, 0);
+ pci_config_writel(bdf, PCI_PREF_LIMIT_UPPER32, 0);
+
+ pci_bios_map_device_in_bus(dev->secondary_bus);
+ return;
+ }
+
+ for (i = 0; i < PCI_NUM_REGIONS; i++) {
+ u32 addr;
+ if (dev->bars[i].addr == 0) {
+ continue;
+ }
+
+ addr = pci_bios_bus_get_addr(bus, pci_addr_to_type(dev->bars[i].addr),
+ dev->bars[i].size);
+ dprintf(1, " bar %d, addr %x, size %x [%s]\n",
+ i, addr, dev->bars[i].size,
+ dev->bars[i].addr & PCI_BASE_ADDRESS_SPACE_IO ? "io" : "mem");
+ pci_set_io_region_addr(bdf, i, addr);
+
+ if (dev->bars[i].is64) {
+ i++;
+ }
+ }
+}
+
+static void pci_bios_check_device_in_bus(int bus)
+{
+ struct pci_device *pci;
+
+ dprintf(1, "PCI: check devices bus %d\n", bus);
+ foreachpci(pci) {
+ if (pci_bdf_to_bus(pci->bdf) != bus)
+ continue;
+ pci_bios_check_device(&busses[bus], pci);
+ }
+}
+
+static void pci_bios_map_device_in_bus(int bus)
+{
+ struct pci_device *pci;
+
+ foreachpci(pci) {
+ if (pci_bdf_to_bus(pci->bdf) != bus)
+ continue;
+ dprintf(1, "PCI: map device bus %d, bfd 0x%x\n", bus, pci->bdf);
+ pci_bios_map_device(&busses[bus], pci);
+ }
+}
+
+static void pci_bios_init_bus_bases(struct pci_bus *bus)
+{
+ u32 base, newbase, size;
+ int type, i;
+
+ for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
+ dprintf(1, " type %s max %x sum %x base %x\n", region_type_name[type],
+ bus->r[type].max, bus->r[type].sum, bus->r[type].base);
+ base = bus->r[type].base;
+ for (i = ARRAY_SIZE(bus->r[type].count)-1; i >= 0; i--) {
+ size = pci_index_to_size(i, type);
+ if (!bus->r[type].count[i])
+ continue;
+ newbase = base + size * bus->r[type].count[i];
+ dprintf(1, " size %8x: %d bar(s), %8x -> %8x\n",
+ size, bus->r[type].count[i], base, newbase - 1);
+ bus->r[type].bases[i] = base;
+ base = newbase;
+ }
+ }
+}
+
+#define ROOT_BASE(top, sum, max) ALIGN_DOWN((top)-(sum),(max) ?: 1)
+
+static int pci_bios_init_root_regions(u32 start, u32 end)
+{
+ struct pci_bus *bus = &busses[0];
+
+ bus->r[PCI_REGION_TYPE_IO].base = 0xc000;
+
+ if (bus->r[PCI_REGION_TYPE_MEM].sum < bus->r[PCI_REGION_TYPE_PREFMEM].sum) {
+ bus->r[PCI_REGION_TYPE_MEM].base =
+ ROOT_BASE(end,
+ bus->r[PCI_REGION_TYPE_MEM].sum,
+ bus->r[PCI_REGION_TYPE_MEM].max);
+ bus->r[PCI_REGION_TYPE_PREFMEM].base =
+ ROOT_BASE(bus->r[PCI_REGION_TYPE_MEM].base,
+ bus->r[PCI_REGION_TYPE_PREFMEM].sum,
+ bus->r[PCI_REGION_TYPE_PREFMEM].max);
+ if (bus->r[PCI_REGION_TYPE_PREFMEM].base >= start) {
+ return 0;
+ }
+ } else {
+ bus->r[PCI_REGION_TYPE_PREFMEM].base =
+ ROOT_BASE(end,
+ bus->r[PCI_REGION_TYPE_PREFMEM].sum,
+ bus->r[PCI_REGION_TYPE_PREFMEM].max);
+ bus->r[PCI_REGION_TYPE_MEM].base =
+ ROOT_BASE(bus->r[PCI_REGION_TYPE_PREFMEM].base,
+ bus->r[PCI_REGION_TYPE_MEM].sum,
+ bus->r[PCI_REGION_TYPE_MEM].max);
+ if (bus->r[PCI_REGION_TYPE_MEM].base >= start) {
+ return 0;
+ }
+ }
+ return -1;
+}
+
+void
+pci_setup(void)
+{
+ if (CONFIG_COREBOOT || usingXen()) {
+ // PCI setup already done by coreboot or Xen - just do probe.
+ pci_probe_devices();
+ return;
+ }
+
+ dprintf(3, "pci setup\n");
+
+ u32 start = BUILD_PCIMEM_START;
+ u32 end = BUILD_PCIMEM_END;
+
+ dprintf(1, "=== PCI bus & bridge init ===\n");
+ if (pci_probe_host() != 0) {
+ return;
+ }
+ pci_bios_init_bus();
+
+ dprintf(1, "=== PCI device probing ===\n");
+ pci_probe_devices();
+
+ dprintf(1, "=== PCI new allocation pass #1 ===\n");
+ busses = malloc_tmp(sizeof(*busses) * busses_count);
+ memset(busses, 0, sizeof(*busses) * busses_count);
+ pci_bios_check_device_in_bus(0 /* host bus */);
+ if (pci_bios_init_root_regions(start, end) != 0) {
+ panic("PCI: out of address space\n");
+ }
+
+ dprintf(1, "=== PCI new allocation pass #2 ===\n");
+ dprintf(1, "PCI: init bases bus 0 (primary)\n");
+ pci_bios_init_bus_bases(&busses[0]);
+ pci_bios_map_device_in_bus(0 /* host bus */);
+
+ pci_bios_init_device_in_bus(0 /* host bus */);
+
+ struct pci_device *pci;
+ foreachpci(pci) {
+ pci_init_device(pci_isa_bridge_tbl, pci, NULL);
+ }
+
+ free(busses);
+ busses_count = 0;
+}
