Commit | Line | Data |
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5924486d RK |
1 | /* |
2 | * linux/arch/arm/mm/iomap.c | |
3 | * | |
4 | * Map IO port and PCI memory spaces so that {read,write}[bwl] can | |
5 | * be used to access this memory. | |
6 | */ | |
7 | #include <linux/module.h> | |
8 | #include <linux/pci.h> | |
9 | #include <linux/ioport.h> | |
fced80c7 | 10 | #include <linux/io.h> |
5924486d RK |
11 | |
12 | #ifdef __io | |
13 | void __iomem *ioport_map(unsigned long port, unsigned int nr) | |
14 | { | |
15 | return __io(port); | |
16 | } | |
17 | EXPORT_SYMBOL(ioport_map); | |
18 | ||
19 | void ioport_unmap(void __iomem *addr) | |
20 | { | |
21 | } | |
22 | EXPORT_SYMBOL(ioport_unmap); | |
23 | #endif | |
24 | ||
25 | #ifdef CONFIG_PCI | |
26 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) | |
27 | { | |
b70d3a2c BH |
28 | resource_size_t start = pci_resource_start(dev, bar); |
29 | resource_size_t len = pci_resource_len(dev, bar); | |
5924486d RK |
30 | unsigned long flags = pci_resource_flags(dev, bar); |
31 | ||
32 | if (!len || !start) | |
33 | return NULL; | |
34 | if (maxlen && len > maxlen) | |
35 | len = maxlen; | |
36 | if (flags & IORESOURCE_IO) | |
37 | return ioport_map(start, len); | |
38 | if (flags & IORESOURCE_MEM) { | |
39 | if (flags & IORESOURCE_CACHEABLE) | |
40 | return ioremap(start, len); | |
41 | return ioremap_nocache(start, len); | |
42 | } | |
43 | return NULL; | |
44 | } | |
45 | EXPORT_SYMBOL(pci_iomap); | |
46 | ||
47 | void pci_iounmap(struct pci_dev *dev, void __iomem *addr) | |
48 | { | |
49 | if ((unsigned long)addr >= VMALLOC_START && | |
50 | (unsigned long)addr < VMALLOC_END) | |
51 | iounmap(addr); | |
52 | } | |
53 | EXPORT_SYMBOL(pci_iounmap); | |
54 | #endif |