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pci-bridge.h
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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 
16 struct device_node;
17 struct pci_controller;
18 
19 /*
20  * pciauto_bus_scan() enumerates the pci space.
21  */
22 
23 extern int pciauto_bus_scan(struct pci_controller *, int);
24 
25 struct 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 
35 struct 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 
66 static 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. */
80 int early_read_config_byte(struct pci_controller*, int, int, int, u8*);
81 int early_read_config_word(struct pci_controller*, int, int, int, u16*);
82 int early_read_config_dword(struct pci_controller*, int, int, int, u32*);
83 int early_write_config_byte(struct pci_controller*, int, int, int, u8);
84 int early_write_config_word(struct pci_controller*, int, int, int, u16);
85 int early_write_config_dword(struct pci_controller*, int, int, int, u32);
86 
87 #endif /* __KERNEL__ */
88 #endif /* _XTENSA_PCI_BRIDGE_H */
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