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

   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
  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 */