[SPARC]: Add iomap interfaces.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 50 insertions, 0 deletions

diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile
index fa5006946062..5db7e1d85385 100644
--- a/arch/sparc/lib/Makefile
+++ b/arch/sparc/lib/Makefile
@@ -9,3 +9,5 @@ lib-y := mul.o rem.o sdiv.o udiv.o umul.o urem.o ashrdi3.o memcpy.o memset.o \
          strncpy_from_user.o divdi3.o udivdi3.o strlen_user.o \
          copy_user.o locks.o atomic.o atomic32.o bitops.o \
          lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o
+
+obj-y += iomap.o
diff --git a/arch/sparc/lib/iomap.c b/arch/sparc/lib/iomap.c
new file mode 100644
index 000000000000..54501c1ca785
--- /dev/null
+++ b/arch/sparc/lib/iomap.c
@@ -0,0 +1,48 @@
+/*
+ * 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)
+{
+        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);
+        }
+        /* What? */
+        return NULL;
+}
+
+void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
+{
+        /* nothing to do */
+}
+EXPORT_SYMBOL(pci_iomap);
+EXPORT_SYMBOL(pci_iounmap);