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iomap.c

/*
 * Implement the sparc iomap interfaces
 */
#include <linux/pci.h>
#include <linux/module.h>
#include <asm/io.h>

/* Create a virtual mapping cookie for an IO port range */
void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
      return (void __iomem *) (unsigned long) port;
}

void ioport_unmap(void __iomem *addr)
{
      /* Nothing to do */
}
EXPORT_SYMBOL(ioport_map);
EXPORT_SYMBOL(ioport_unmap);

/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
      resource_size_t start = pci_resource_start(dev, bar);
      resource_size_t 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);
      }
      /* What? */
      return NULL;
}

void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
      /* nothing to do */
}
EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);

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