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