include/asm-alpha/pci.h

   1 #ifndef __ALPHA_PCI_H
   2 #define __ALPHA_PCI_H
   3
   4 #include <linux/config.h>
   5 #include <linux/pci.h>
   6
   7
   8 /*
   9  * The following structure is used to manage multiple PCI busses.
  10  *
  11  * XXX: We should solve this problem in an architecture independent
  12  * way, rather than hacking something up here.
  13  */
  14
  15 struct linux_hose_info {
  16         struct pci_bus                  pci_bus;
  17         struct linux_hose_info         *next;
  18         unsigned long                   pci_io_space;
  19         unsigned long                   pci_mem_space;
  20         unsigned long                   pci_config_space;
  21         unsigned long                   pci_sparse_space;
  22         unsigned int                    pci_first_busno;
  23         unsigned int                    pci_last_busno;
  24         unsigned int                    pci_hose_index;
  25 };
  26
  27 /* This is indexed by a pseudo- PCI bus number to obtain the real deal.  */
  28 extern struct linux_hose_info *bus2hose[256];
  29
  30 /* Create a handle that is OR-ed into the reported I/O space address
  31    for a device.  We use this later to find the bus a device lives on.  */
  32
  33 #if defined(CONFIG_ALPHA_GENERIC) \
  34     || defined(CONFIG_ALPHA_MCPCIA) \
  35     || defined(CONFIG_ALPHA_TSUNAMI)
  36
  37 #define PCI_HANDLE(bus)   ((bus2hose[bus]->pci_hose_index & 3UL) << 32)
  38 #define DEV_IS_ON_PRIMARY(dev) \
  39   (bus2hose[(dev)->bus->number]->pci_first_busno == (dev)->bus->number)
  40
  41 #else
  42
  43 #define PCI_HANDLE(bus)         0
  44 #define DEV_IS_ON_PRIMARY(dev)  ((dev)->bus->number == 0)
  45
  46 #endif /* Multiple busses */
  47
  48 #endif /* __ALPHA_PCI_H */