/* * BK Id: SCCS/s.pci-bridge.h 1.11 05/21/01 01:31:30 cort */#ifdef __KERNEL__#ifndef _ASM_PCI_BRIDGE_H#define _ASM_PCI_BRIDGE_Hstruct device_node;struct pci_controller;/* * pci_io_base returns the memory address at which you can access * the I/O space for PCI bus number `bus' (or NULL on error). */extern void *pci_bus_io_base(unsigned int bus);extern unsigned long pci_bus_io_base_phys(unsigned int bus);extern unsigned long pci_bus_mem_base_phys(unsigned int bus);/* * PCI <-> OF matching functions  */extern int pci_device_from_OF_node(struct device_node *node,				   u8* bus, u8* devfn);extern struct device_node* pci_device_to_OF_node(struct pci_dev *);/* Get the PCI host controller for a bus */extern struct pci_controller* pci_bus_to_hose(int bus);/* Get the PCI host controller for an OF device */extern struct pci_controller*pci_find_hose_for_OF_device(struct device_node* node);/* Fill up host controller resources from the OF node */extern voidpci_process_bridge_OF_ranges(struct pci_controller *hose,			   struct device_node *dev, int primary);/* * Structure of a PCI controller (host bridge) */struct pci_controller {	int index;			/* used for pci_controller_num */	struct pci_controller *next;        struct pci_bus *bus;	void *arch_data;	int first_busno;	int last_busno;        	void *io_base_virt;	unsigned long io_base_phys;		/* Some machines (PReP) have a non 1:1 mapping of	 * the PCI memory space in the CPU bus space	 */	unsigned long pci_mem_offset;	struct pci_ops *ops;	volatile unsigned int *cfg_addr;	volatile unsigned char *cfg_data;	/* Currently, we limit ourselves to 1 IO range and 3 mem	 * ranges since the common pci_bus structure can't handle more	 */	struct resource	io_resource;	struct resource mem_resources[3];	int mem_resource_count;};/* These are used for config access before all the PCI probing   has been done. */int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 *val);int early_read_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 *val);int early_read_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 *val);int early_write_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 val);int early_write_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 val);int early_write_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 val);#endif#endif /* __KERNEL__ */