xref: /openbmc/linux/include/asm-generic/pci.h (revision b6dcefde)
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 */
62