include/asm-ppc/pci-bridge.h

   1 #ifdef __KERNEL__
   2 #ifndef _ASM_PCI_BRIDGE_H
   3 #define _ASM_PCI_BRIDGE_H
   4
   5 void pmac_find_bridges(void);
   6
   7 /*
   8  * pci_io_base returns the memory address at which you can access
   9  * the I/O space for PCI bus number `bus' (or NULL on error).
  10  *
  11  * NOTE: This doesn't handle the new Uni-N chip which requires
  12  *       per-device io_base.
  13  */
  14 void *pci_io_base(unsigned int bus);
  15
  16 /* This version handles the new Uni-N host bridge, the iobase is now
  17  * a per-device thing. I also added the memory base so PReP can
  18  * be fixed to return 0xc0000000 (I didn't actually implement it)
  19  *
  20  * pci_dev_io_base() returns either a virtual (ioremap'ed) address or
  21  * a physical address. In-kernel clients will use logical while the
  22  * sys_pciconfig_iobase syscall returns a physical one to userland.
  23  */
  24 void *pci_dev_io_base(unsigned char bus, unsigned char devfn, int physical);
  25 void *pci_dev_mem_base(unsigned char bus, unsigned char devfn);
  26
  27 /* Returns the root-bridge number (Uni-N number) of a device */
  28 int pci_dev_root_bridge(unsigned char bus, unsigned char devfn);
  29
  30 /*
  31  * pci_device_loc returns the bus number and device/function number
  32  * for a device on a PCI bus, given its device_node struct.
  33  * It returns 0 if OK, -1 on error.
  34  */
  35 int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
  36                    unsigned char *devfn_ptr);
  37
  38 struct bridge_data {
  39         volatile unsigned int *cfg_addr;
  40         volatile unsigned char *cfg_data;
  41         void *io_base;          /* virtual */
  42         unsigned long io_base_phys;
  43         int bus_number;
  44         int max_bus;
  45         struct bridge_data *next;
  46         struct device_node *node;
  47 };
  48
  49 #endif
  50 #endif /* __KERNEL__ */