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-rw-r--r--arch/arm/mm/iomap.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mm/iomap.c b/arch/arm/mm/iomap.c
new file mode 100644
index 000000000000..62066f3020c8
--- /dev/null
+++ b/arch/arm/mm/iomap.c
@@ -0,0 +1,55 @@
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>
10
11#include <asm/io.h>
12
13#ifdef __io
14void __iomem *ioport_map(unsigned long port, unsigned int nr)
15{
16 return __io(port);
17}
18EXPORT_SYMBOL(ioport_map);
19
20void ioport_unmap(void __iomem *addr)
21{
22}
23EXPORT_SYMBOL(ioport_unmap);
24#endif
25
26#ifdef CONFIG_PCI
27void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
28{
29 unsigned long start = pci_resource_start(dev, bar);
30 unsigned long len = pci_resource_len(dev, bar);
31 unsigned long flags = pci_resource_flags(dev, bar);
32
33 if (!len || !start)
34 return NULL;
35 if (maxlen && len > maxlen)
36 len = maxlen;
37 if (flags & IORESOURCE_IO)
38 return ioport_map(start, len);
39 if (flags & IORESOURCE_MEM) {
40 if (flags & IORESOURCE_CACHEABLE)
41 return ioremap(start, len);
42 return ioremap_nocache(start, len);
43 }
44 return NULL;
45}
46EXPORT_SYMBOL(pci_iomap);
47
48void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
49{
50 if ((unsigned long)addr >= VMALLOC_START &&
51 (unsigned long)addr < VMALLOC_END)
52 iounmap(addr);
53}
54EXPORT_SYMBOL(pci_iounmap);
55#endif