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
  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 */