include/asm-generic/pci.h

   1 /*
   2  * linux/include/asm-generic/pci.h
   3  *
   4  *  Copyright (C) 2003 Russell King
   5  */
   6 #ifndef _ASM_GENERIC_PCI_H
   7 #define _ASM_GENERIC_PCI_H
   8
   9 /**
  10  * pcibios_resource_to_bus - convert resource to PCI bus address
  11  * @dev: device which owns this resource
  12  * @region: converted bus-centric region (start,end)
  13  * @res: resource to convert
  14  *
  15  * Convert a resource to a PCI device bus address or bus window.
  16  */
  17 static inline void
  18 pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
  19                          struct resource *res)
  20 {
  21         region->start = res->start;
  22         region->end = res->end;
  23 }
  24
  25 static inline void
  26 pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
  27                         struct pci_bus_region *region)
  28 {
  29         res->start = region->start;
  30         res->end = region->end;
  31 }
  32
  33 static inline struct resource *
  34 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
  35 {
  36         struct resource *root = NULL;
  37
  38         if (res->flags & IORESOURCE_IO)
  39                 root = &ioport_resource;
  40         if (res->flags & IORESOURCE_MEM)
  41                 root = &iomem_resource;
  42
  43         return root;
  44 }
  45
  46 #ifndef HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
  47 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  48 {
  49         return channel ? 15 : 14;
  50 }
  51 #endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
  52
  53 /*
  54  * By default, assume that no iommu is in use and that the PCI
  55  * space is mapped to address physical 0.
  56  */
  57 #ifndef PCI_DMA_BUS_IS_PHYS
  58 #define PCI_DMA_BUS_IS_PHYS     (1)
  59 #endif
  60
  61 #endif /* _ASM_GENERIC_PCI_H */