[PATCH] ARM: Add iomap support for ARM

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 47 insertions, 0 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 00bb8fd37a5..7110e54182b 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -170,3 +170,50 @@ void __iounmap(void __iomem *addr)
         vfree((void *) (PAGE_MASK & (unsigned long) addr));
 }
 EXPORT_SYMBOL(__iounmap);
+
+#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
+#include <linux/pci.h>
+#include <linux/ioport.h>
+
+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