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
  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 */
  89