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Chris Zankel9a8fd552005-06-23 22:01:26 -07001/*
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 */