arch/i386/kernel/pci-i386.h

   1 /*
   2  *      Low-Level PCI Access for i386 machines.
   3  *
   4  *      (c) 1999 Martin Mares <mj@ucw.cz>
   5  */
   6
   7 #undef DEBUG
   8
   9 #ifdef DEBUG
  10 #define DBG(x...) printk(x)
  11 #else
  12 #define DBG(x...)
  13 #endif
  14
  15 #define PCI_PROBE_BIOS 1
  16 #define PCI_PROBE_CONF1 2
  17 #define PCI_PROBE_CONF2 4
  18 #define PCI_NO_SORT 0x100
  19 #define PCI_BIOS_SORT 0x200
  20 #define PCI_NO_CHECKS 0x400
  21 #define PCI_ASSIGN_ROMS 0x1000
  22 #define PCI_BIOS_IRQ_SCAN 0x2000
  23
  24 extern unsigned int pci_probe;
  25
  26 /* pci-i386.c */
  27
  28 extern unsigned int pcibios_max_latency;
  29
  30 void pcibios_resource_survey(void);
  31 int pcibios_enable_resources(struct pci_dev *);
  32
  33 /* pci-pc.c */
  34
  35 extern int pcibios_last_bus;
  36 extern struct pci_bus *pci_root_bus;
  37 extern struct pci_ops *pci_root_ops;
  38
  39 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  40 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
  41
  42 /* pci-irq.c */
  43
  44 struct irq_info {
  45         u8 bus, devfn;                  /* Bus, device and function */
  46         struct {
  47                 u8 link;                /* IRQ line ID, chipset dependent, 0=not routed */
  48                 u16 bitmap;             /* Available IRQs */
  49         } __attribute__((packed)) irq[4];
  50         u8 slot;                        /* Slot number, 0=onboard */
  51         u8 rfu;
  52 } __attribute__((packed));
  53
  54 struct irq_routing_table {
  55         u32 signature;                  /* PIRQ_SIGNATURE should be here */
  56         u16 version;                    /* PIRQ_VERSION */
  57         u16 size;                       /* Table size in bytes */
  58         u8 rtr_bus, rtr_devfn;          /* Where the interrupt router lies */
  59         u16 exclusive_irqs;             /* IRQs devoted exclusively to PCI usage */
  60         u16 rtr_vendor, rtr_device;     /* Vendor and device ID of interrupt router */
  61         u32 miniport_data;              /* Crap */
  62         u8 rfu[11];
  63         u8 checksum;                    /* Modulo 256 checksum must give zero */
  64         struct irq_info slots[0];
  65 } __attribute__((packed));
  66
  67 extern unsigned int pcibios_irq_mask;
  68
  69 void pcibios_irq_init(void);
  70 void pcibios_fixup_irqs(void);
  71 void pcibios_enable_irq(struct pci_dev *dev);