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#ifdef __KERNEL__
#ifndef _ASM_PCI_BRIDGE_H
#define _ASM_PCI_BRIDGE_H
struct 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);
/*
* Structure of a PCI controller (host bridge)
*/
struct pci_controller {
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__ */
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