release/src-rt-6.x.4708/linux/linux-2.6.36/arch/sparc/lib/iomap.c

   1 /*
   2  * Implement the sparc iomap interfaces
   3  */
   4 #include <linux/pci.h>
   5 #include <linux/module.h>
   6 #include <asm/io.h>
   7
   8 /* Create a virtual mapping cookie for an IO port range */
   9 void __iomem *ioport_map(unsigned long port, unsigned int nr)
  10 {
  11         return (void __iomem *) (unsigned long) port;
  12 }
  13
  14 void ioport_unmap(void __iomem *addr)
  15 {
  16         /* Nothing to do */
  17 }
  18 EXPORT_SYMBOL(ioport_map);
  19 EXPORT_SYMBOL(ioport_unmap);
  20
  21 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
  22 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
  23 {
  24         resource_size_t start = pci_resource_start(dev, bar);
  25         resource_size_t len = pci_resource_len(dev, bar);
  26         unsigned long flags = pci_resource_flags(dev, bar);
  27
  28         if (!len || !start)
  29                 return NULL;
  30         if (maxlen && len > maxlen)
  31                 len = maxlen;
  32         if (flags & IORESOURCE_IO)
  33                 return ioport_map(start, len);
  34         if (flags & IORESOURCE_MEM) {
  35                 if (flags & IORESOURCE_CACHEABLE)
  36                         return ioremap(start, len);
  37                 return ioremap_nocache(start, len);
  38         }
  39         /* What? */
  40         return NULL;
  41 }
  42
  43 void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
  44 {
  45         /* nothing to do */
  46 }
  47 EXPORT_SYMBOL(pci_iomap);
  48 EXPORT_SYMBOL(pci_iounmap);