mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
|
/*
|
||
|
|
* linux/arch/arm/mm/iomap.c
|
||
|
|
*
|
||
|
|
* Map IO port and PCI memory spaces so that {read,write}[bwl] can
|
||
|
|
* be used to access this memory.
|
||
|
|
*/
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/pci.h>
|
||
|
|
#include <linux/ioport.h>
|
||
|
|
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#ifdef __io
|
||
|
|
void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
||
|
|
{
|
||
|
|
return __io(port);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ioport_map);
|
||
|
|
|
||
|
|
void ioport_unmap(void __iomem *addr)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ioport_unmap);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef CONFIG_PCI
|
||
|
|
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
|
||
|
|
{
|
||
|
|
unsigned long start = pci_resource_start(dev, bar);
|
||
|
|
unsigned long len = pci_resource_len(dev, bar);
|
||
|
|
unsigned long flags = pci_resource_flags(dev, bar);
|
||
|
|
|
||
|
|
if (!len || !start)
|
||
|
|
return NULL;
|
||
|
|
if (maxlen && len > maxlen)
|
||
|
|
len = maxlen;
|
||
|
|
if (flags & IORESOURCE_IO)
|
||
|
|
return ioport_map(start, len);
|
||
|
|
if (flags & IORESOURCE_MEM) {
|
||
|
|
if (flags & IORESOURCE_CACHEABLE)
|
||
|
|
return ioremap(start, len);
|
||
|
|
return ioremap_nocache(start, len);
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(pci_iomap);
|
||
|
|
|
||
|
|
void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
|
||
|
|
{
|
||
|
|
if ((unsigned long)addr >= VMALLOC_START &&
|
||
|
|
(unsigned long)addr < VMALLOC_END)
|
||
|
|
iounmap(addr);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(pci_iounmap);
|
||
|
|
#endif
|