LXR linux/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
  14struct device_node;
  15struct pci_controller;
  16
  17/*
  18 * pciauto_bus_scan() enumerates the pci space.
  19 */
  20
  21extern int pciauto_bus_scan(struct pci_controller *, int);
  22
  23struct 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
  33struct 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
  64static 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. */
  78int early_read_config_byte(struct pci_controller*, int, int, int, u8*);
  79int early_read_config_word(struct pci_controller*, int, int, int, u16*);
  80int early_read_config_dword(struct pci_controller*, int, int, int, u32*);
  81int early_write_config_byte(struct pci_controller*, int, int, int, u8);
  82int early_write_config_word(struct pci_controller*, int, int, int, u16);
  83int early_write_config_dword(struct pci_controller*, int, int, int, u32);
  84
  85#endif  /* _XTENSA_PCI_BRIDGE_H */
  86