arch/i386/pci/pci.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          0x0001
  16 #define PCI_PROBE_CONF1         0x0002
  17 #define PCI_PROBE_CONF2         0x0004
  18 #define PCI_PROBE_MMCONF        0x0008
  19 #define PCI_PROBE_MASK          0x000f
  20
  21 #define PCI_NO_SORT             0x0100
  22 #define PCI_BIOS_SORT           0x0200
  23 #define PCI_NO_CHECKS           0x0400
  24 #define PCI_USE_PIRQ_MASK       0x0800
  25 #define PCI_ASSIGN_ROMS         0x1000
  26 #define PCI_BIOS_IRQ_SCAN       0x2000
  27 #define PCI_ASSIGN_ALL_BUSSES   0x4000
  28
  29 extern unsigned int pci_probe;
  30 extern unsigned long pirq_table_addr;
  31
  32 /* pci-i386.c */
  33
  34 extern unsigned int pcibios_max_latency;
  35
  36 void pcibios_resource_survey(void);
  37 int pcibios_enable_resources(struct pci_dev *, int);
  38
  39 /* pci-pc.c */
  40
  41 extern int pcibios_last_bus;
  42 extern struct pci_bus *pci_root_bus;
  43 extern struct pci_ops pci_root_ops;
  44
  45 /* pci-irq.c */
  46
  47 struct irq_info {
  48         u8 bus, devfn;                  /* Bus, device and function */
  49         struct {
  50                 u8 link;                /* IRQ line ID, chipset dependent, 0=not routed */
  51                 u16 bitmap;             /* Available IRQs */
  52         } __attribute__((packed)) irq[4];
  53         u8 slot;                        /* Slot number, 0=onboard */
  54         u8 rfu;
  55 } __attribute__((packed));
  56
  57 struct irq_routing_table {
  58         u32 signature;                  /* PIRQ_SIGNATURE should be here */
  59         u16 version;                    /* PIRQ_VERSION */
  60         u16 size;                       /* Table size in bytes */
  61         u8 rtr_bus, rtr_devfn;          /* Where the interrupt router lies */
  62         u16 exclusive_irqs;             /* IRQs devoted exclusively to PCI usage */
  63         u16 rtr_vendor, rtr_device;     /* Vendor and device ID of interrupt router */
  64         u32 miniport_data;              /* Crap */
  65         u8 rfu[11];
  66         u8 checksum;                    /* Modulo 256 checksum must give zero */
  67         struct irq_info slots[0];
  68 } __attribute__((packed));
  69
  70 extern unsigned int pcibios_irq_mask;
  71
  72 extern int pcibios_scanned;
  73 extern spinlock_t pci_config_lock;
  74
  75 extern int (*pcibios_enable_irq)(struct pci_dev *dev);
  76 extern void (*pcibios_disable_irq)(struct pci_dev *dev);
  77
  78 extern int pci_conf1_write(unsigned int seg, unsigned int bus,
  79                            unsigned int devfn, int reg, int len, u32 value);
  80 extern int pci_conf1_read(unsigned int seg, unsigned int bus,
  81                           unsigned int devfn, int reg, int len, u32 *value);
  82
  83