Root/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 */
17static inline void
18pcibios_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
25static inline void
26pcibios_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
33static inline struct resource *
34pcibios_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
47static 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 */
62

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