--- /dev/null
+#ifndef __PCI_H
+#define __PCI_H
+
+#include "types.h" // u32
+
+#define PCI_ROM_SLOT 6
+#define PCI_NUM_REGIONS 7
+
+static inline u8 pci_bdf_to_bus(u16 bdf) {
+ return bdf >> 8;
+}
+static inline u8 pci_bdf_to_devfn(u16 bdf) {
+ return bdf & 0xff;
+}
+static inline u16 pci_bdf_to_busdev(u16 bdf) {
+ return bdf & ~0x07;
+}
+static inline u8 pci_bdf_to_dev(u16 bdf) {
+ return (bdf >> 3) & 0x1f;
+}
+static inline u8 pci_bdf_to_fn(u16 bdf) {
+ return bdf & 0x07;
+}
+static inline u16 pci_to_bdf(int bus, int dev, int fn) {
+ return (bus<<8) | (dev<<3) | fn;
+}
+static inline u16 pci_bus_devfn_to_bdf(int bus, u16 devfn) {
+ return (bus << 8) | devfn;
+}
+
+void pci_config_writel(u16 bdf, u32 addr, u32 val);
+void pci_config_writew(u16 bdf, u32 addr, u16 val);
+void pci_config_writeb(u16 bdf, u32 addr, u8 val);
+u32 pci_config_readl(u16 bdf, u32 addr);
+u16 pci_config_readw(u16 bdf, u32 addr);
+u8 pci_config_readb(u16 bdf, u32 addr);
+void pci_config_maskw(u16 bdf, u32 addr, u16 off, u16 on);
+
+struct pci_device *pci_find_device(u16 vendid, u16 devid);
+struct pci_device *pci_find_class(u16 classid);
+
+struct pci_device {
+ u16 bdf;
+ u8 rootbus;
+ struct pci_device *next;
+ struct pci_device *parent;
+
+ // Configuration space device information
+ u16 vendor, device;
+ u16 class;
+ u8 prog_if, revision;
+ u8 header_type;
+ u8 secondary_bus;
+ struct {
+ u32 addr;
+ u32 size;
+ int is64;
+ } bars[PCI_NUM_REGIONS];
+
+ // Local information on device.
+ int have_driver;
+};
+extern struct pci_device *PCIDevices;
+extern int MaxPCIBus;
+int pci_probe_host(void);
+void pci_probe_devices(void);
+static inline u32 pci_classprog(struct pci_device *pci) {
+ return (pci->class << 8) | pci->prog_if;
+}
+
+#define foreachpci(PCI) \
+ for (PCI=PCIDevices; PCI; PCI=PCI->next)
+
+int pci_next(int bdf, int bus);
+#define foreachbdf(BDF, BUS) \
+ for (BDF=pci_next(pci_bus_devfn_to_bdf((BUS), 0)-1, (BUS)) \
+ ; BDF >= 0 \
+ ; BDF=pci_next(BDF, (BUS)))
+
+#define PCI_ANY_ID (~0)
+struct pci_device_id {
+ u32 vendid;
+ u32 devid;
+ u32 class;
+ u32 class_mask;
+ void (*func)(struct pci_device *pci, void *arg);
+};
+
+#define PCI_DEVICE(vendor_id, device_id, init_func) \
+ { \
+ .vendid = (vendor_id), \
+ .devid = (device_id), \
+ .class = PCI_ANY_ID, \
+ .class_mask = 0, \
+ .func = (init_func) \
+ }
+
+#define PCI_DEVICE_CLASS(vendor_id, device_id, class_code, init_func) \
+ { \
+ .vendid = (vendor_id), \
+ .devid = (device_id), \
+ .class = (class_code), \
+ .class_mask = ~0, \
+ .func = (init_func) \
+ }
+
+#define PCI_DEVICE_END \
+ { \
+ .vendid = 0, \
+ }
+
+int pci_init_device(const struct pci_device_id *ids
+ , struct pci_device *pci, void *arg);
+struct pci_device *pci_find_init_device(const struct pci_device_id *ids
+ , void *arg);
+void pci_reboot(void);
+
+// helper functions to access pci mmio bars from real mode
+u32 pci_readl(u32 addr);
+void pci_writel(u32 addr, u32 val);
+
+// pirtable.c
+void create_pirtable(void);
+
+
+/****************************************************************
+ * PIR table
+ ****************************************************************/
+
+extern u16 PirOffset;
+
+struct link_info {
+ u8 link;
+ u16 bitmap;
+} PACKED;
+
+struct pir_slot {
+ u8 bus;
+ u8 dev;
+ struct link_info links[4];
+ u8 slot_nr;
+ u8 reserved;
+} PACKED;
+
+struct pir_header {
+ u32 signature;
+ u16 version;
+ u16 size;
+ u8 router_bus;
+ u8 router_devfunc;
+ u16 exclusive_irqs;
+ u32 compatible_devid;
+ u32 miniport_data;
+ u8 reserved[11];
+ u8 checksum;
+ struct pir_slot slots[0];
+} PACKED;
+
+#define PIR_SIGNATURE 0x52495024 // $PIR
+
+
+#endif
