/*
* include/asm-xtensa/pci-bridge.h
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of
* this archive for more details.
*
* Copyright (C) 2005 Tensilica Inc.
*/

#ifndef _XTENSA_PCI_BRIDGE_H
#define _XTENSA_PCI_BRIDGE_H

#ifdef __KERNEL__

struct device_node;
struct pci_controller;

/*
* pciauto_bus_scan() enumerates the pci space.
*/

extern int pciauto_bus_scan(struct pci_controller *, int);

struct pci_space {
unsigned long start;
unsigned long end;
unsigned long base;
};

/*
* 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;

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;

/* Host bridge I/O and Memory space
* Used for BAR placement algorithms
*/
struct pci_space io_space;
struct pci_space mem_space;

/* Return the interrupt number fo a device. */
int (*map_irq)(struct pci_dev*, u8, u8);

};

static inline void pcibios_init_resource(struct resource *res,
unsigned long start, unsigned long end, int flags, char *name)
{
res->start = start;
res->end = end;
res->flags = flags;
res->name = name;
res->parent = NULL;
res->sibling = NULL;
res->child = NULL;
}


/* These are used for config access before all the PCI probing has been done. */
int early_read_config_byte(struct pci_controller*, int, int, int, u8*);
int early_read_config_word(struct pci_controller*, int, int, int, u16*);
int early_read_config_dword(struct pci_controller*, int, int, int, u32*);
int early_write_config_byte(struct pci_controller*, int, int, int, u8);
int early_write_config_word(struct pci_controller*, int, int, int, u16);
int early_write_config_dword(struct pci_controller*, int, int, int, u32);

#endif /* __KERNEL__ */
#endif /* _XTENSA_PCI_BRIDGE_H */