release/src-rt-6.x.4708/linux/linux-2.6.36/arch/microblaze/pci/iomap.c

   1 /*
   2  * ppc64 "iomap" interface implementation.
   3  *
   4  * (C) Copyright 2004 Linus Torvalds
   5  */
   6 #include <linux/init.h>
   7 #include <linux/pci.h>
   8 #include <linux/mm.h>
   9 #include <asm/io.h>
  10 #include <asm/pci-bridge.h>
  11
  12 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
  13 {
  14         resource_size_t start = pci_resource_start(dev, bar);
  15         resource_size_t len = pci_resource_len(dev, bar);
  16         unsigned long flags = pci_resource_flags(dev, bar);
  17
  18         if (!len)
  19                 return NULL;
  20         if (max && len > max)
  21                 len = max;
  22         if (flags & IORESOURCE_IO)
  23                 return ioport_map(start, len);
  24         if (flags & IORESOURCE_MEM)
  25                 return ioremap(start, len);
  26         /* What? */
  27         return NULL;
  28 }
  29 EXPORT_SYMBOL(pci_iomap);
  30
  31 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
  32 {
  33         if (isa_vaddr_is_ioport(addr))
  34                 return;
  35         if (pcibios_vaddr_is_ioport(addr))
  36                 return;
  37         iounmap(addr);
  38 }
  39 EXPORT_SYMBOL(pci_iounmap);