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/*
 *      Low-Level PCI Access for i386 machines.
 *
 *      (c) 1999 Martin Mares <mj@ucw.cz>
 */


//#define DEBUG

#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif

#define PCI_PROBE_BIOS          0x0001
#define PCI_PROBE_CONF1         0x0002
#define PCI_PROBE_CONF2         0x0004
#define PCI_NO_SORT             0x0100
#define PCI_BIOS_SORT           0x0200
#define PCI_NO_CHECKS           0x0400
#define PCI_USE_PIRQ_MASK       0x0800
#define PCI_ASSIGN_ROMS         0x1000
#define PCI_BIOS_IRQ_SCAN       0x2000
#define PCI_ASSIGN_ALL_BUSSES   0x4000
#define PCI_NO_ACPI_ROUTING     0x8000

extern unsigned int pci_probe;

/* pci-i386.c */

extern unsigned int pcibios_max_latency;

void pcibios_resource_survey(void);
int pcibios_enable_resources(struct pci_dev *, int);

/* pci-pc.c */

extern int pcibios_last_bus;
extern struct pci_bus *pci_root_bus;
extern struct pci_ops pci_root_ops;

/* pci-irq.c */

struct irq_info {
        u8 bus, devfn;                  /* Bus, device and function */
        struct {
                u8 link;                /* IRQ line ID, chipset dependent, 0=not routed */
                u16 bitmap;             /* Available IRQs */
        } __attribute__((packed)) irq[4];
        u8 slot;                        /* Slot number, 0=onboard */
        u8 rfu;
} __attribute__((packed));

struct irq_routing_table {
        u32 signature;                  /* PIRQ_SIGNATURE should be here */
        u16 version;                    /* PIRQ_VERSION */
        u16 size;                       /* Table size in bytes */
        u8 rtr_bus, rtr_devfn;          /* Where the interrupt router lies */
        u16 exclusive_irqs;             /* IRQs devoted exclusively to PCI usage */
        u16 rtr_vendor, rtr_device;     /* Vendor and device ID of interrupt router */
        u32 miniport_data;              /* Crap */
        u8 rfu[11];
        u8 checksum;                    /* Modulo 256 checksum must give zero */
        struct irq_info slots[0];
} __attribute__((packed));

extern unsigned int pcibios_irq_mask;

extern int pcibios_scanned;
extern spinlock_t pci_config_lock;

int pirq_enable_irq(struct pci_dev *dev);

extern int (*pcibios_enable_irq)(struct pci_dev *dev);