include/asm-ppc/pci-bridge.h

   1 #ifndef _ASM_PCI_BRIDGE_H
   2 #define _ASM_PCI_BRIDGE_H
   3
   4 void pmac_find_bridges(void);
   5
   6 /*
   7  * pci_io_base returns the memory address at which you can access
   8  * the I/O space for PCI bus number `bus' (or NULL on error).
   9  *
  10  * NOTE: This doesn't handle the new Uni-N chip which requires
  11  *       per-device io_base.
  12  */
  13 void *pci_io_base(unsigned int bus);
  14
  15 /* This version handles the new Uni-N host bridge, the iobase is now
  16  * a per-device thing. I also added the memory base so PReP can
  17  * be fixed to return 0xc0000000 (I didn't actually implement it)
  18  */
  19 void *pci_dev_io_base(unsigned char bus, unsigned char devfn);
  20 void *pci_dev_mem_base(unsigned char bus, unsigned char devfn);
  21
  22 /* Returns the root-bridge number (Uni-N number) of a device */
  23 int pci_dev_root_bridge(unsigned char bus, unsigned char devfn);
  24
  25 /*
  26  * pci_device_loc returns the bus number and device/function number
  27  * for a device on a PCI bus, given its device_node struct.
  28  * It returns 0 if OK, -1 on error.
  29  */
  30 int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
  31                    unsigned char *devfn_ptr);
  32
  33 struct bridge_data {
  34         volatile unsigned int *cfg_addr;
  35         volatile unsigned char *cfg_data;
  36         void *io_base;
  37         int bus_number;
  38         int max_bus;
  39         struct bridge_data *next;
  40         struct device_node *node;
  41 };
  42
  43 #endif