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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/xtensa/include/asm/pci-bridge.h
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/*

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 * include/asm-xtensa/pci-bridge.h

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 *

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 * This file is subject to the terms and conditions of the GNU General

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 * Public License.  See the file "COPYING" in the main directory of

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 * this archive for more details.

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 *

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 * Copyright (C) 2005 Tensilica Inc.

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 */

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#ifndef _XTENSA_PCI_BRIDGE_H

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#define _XTENSA_PCI_BRIDGE_H

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struct device_node;

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struct pci_controller;

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/*

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 * pciauto_bus_scan() enumerates the pci space.

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 */

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extern int pciauto_bus_scan(struct pci_controller *, int);

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struct pci_space {

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	unsigned long start;

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	unsigned long end;

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	unsigned long base;

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};

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/*

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 * Structure of a PCI controller (host bridge)

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 */

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struct pci_controller {

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	int index;			/* used for pci_controller_num */

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	struct pci_controller *next;

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	struct pci_bus *bus;

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	void *arch_data;

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	int first_busno;

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	int last_busno;

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	struct pci_ops *ops;

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	volatile unsigned int *cfg_addr;

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	volatile unsigned char *cfg_data;

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	/* Currently, we limit ourselves to 1 IO range and 3 mem

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	 * ranges since the common pci_bus structure can't handle more

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	 */

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	struct resource	io_resource;

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	struct resource mem_resources[3];

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	int mem_resource_count;

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	/* Host bridge I/O and Memory space

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	 * Used for BAR placement algorithms

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	 */

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	struct pci_space io_space;

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	struct pci_space mem_space;

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	/* Return the interrupt number fo a device. */

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	int (*map_irq)(struct pci_dev*, u8, u8);

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};

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static inline void pcibios_init_resource(struct resource *res,

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		unsigned long start, unsigned long end, int flags, char *name)

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{

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	res->start = start;

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	res->end = end;

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	res->flags = flags;

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	res->name = name;

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	res->parent = NULL;

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	res->sibling = NULL;

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	res->child = NULL;

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}

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#endif	/* _XTENSA_PCI_BRIDGE_H */

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