1/*
2 * include/asm-xtensa/pci-bridge.h
3 *
4 * This file is subject to the terms and conditions of the GNU General
5 * Public License.  See the file "COPYING" in the main directory of
6 * this archive for more details.
7 *
8 * Copyright (C) 2005 Tensilica Inc.
9 */
10
11#ifndef _XTENSA_PCI_BRIDGE_H
12#define _XTENSA_PCI_BRIDGE_H
13
14#ifdef __KERNEL__
15
16struct device_node;
17struct pci_controller;
18
19/*
20 * pciauto_bus_scan() enumerates the pci space.
21 */
22
23extern int pciauto_bus_scan(struct pci_controller *, int);
24
25struct pci_space {
26	unsigned long start;
27	unsigned long end;
28	unsigned long base;
29};
30
31/*
32 * Structure of a PCI controller (host bridge)
33 */
34
35struct pci_controller {
36	int index;			/* used for pci_controller_num */
37	struct pci_controller *next;
38        struct pci_bus *bus;
39	void *arch_data;
40
41	int first_busno;
42	int last_busno;
43
44	struct pci_ops *ops;
45	volatile unsigned int *cfg_addr;
46	volatile unsigned char *cfg_data;
47
48	/* Currently, we limit ourselves to 1 IO range and 3 mem
49	 * ranges since the common pci_bus structure can't handle more
50	 */
51	struct resource	io_resource;
52	struct resource mem_resources[3];
53	int mem_resource_count;
54
55	/* Host bridge I/O and Memory space
56	 * Used for BAR placement algorithms
57	 */
58	struct pci_space io_space;
59	struct pci_space mem_space;
60
61	/* Return the interrupt number fo a device. */
62	int (*map_irq)(struct pci_dev*, u8, u8);
63
64};
65
66static inline void pcibios_init_resource(struct resource *res,
67		unsigned long start, unsigned long end, int flags, char *name)
68{
69	res->start = start;
70	res->end = end;
71	res->flags = flags;
72	res->name = name;
73	res->parent = NULL;
74	res->sibling = NULL;
75	res->child = NULL;
76}
77
78
79/* These are used for config access before all the PCI probing has been done. */
80int early_read_config_byte(struct pci_controller*, int, int, int, u8*);
81int early_read_config_word(struct pci_controller*, int, int, int, u16*);
82int early_read_config_dword(struct pci_controller*, int, int, int, u32*);
83int early_write_config_byte(struct pci_controller*, int, int, int, u8);
84int early_write_config_word(struct pci_controller*, int, int, int, u16);
85int early_write_config_dword(struct pci_controller*, int, int, int, u32);
86
87#endif	/* __KERNEL__ */
88#endif	/* _XTENSA_PCI_BRIDGE_H */
89