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
56