sh: pci: HAVE_PCI_MMAP support.
Derived from the MIPS version, now uses pgprot_noncached().
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/pci/pci-lib.c b/arch/sh/drivers/pci/pci-lib.c
new file mode 100644
index 0000000..1a43a35
--- /dev/null
+++ b/arch/sh/drivers/pci/pci-lib.c
@@ -0,0 +1,26 @@
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine)
+{
+ /*
+ * I/O space can be accessed via normal processor loads and stores on
+ * this platform but for now we elect not to do this and portable
+ * drivers should not do this anyway.
+ */
+ if (mmap_state == pci_mmap_io)
+ return -EINVAL;
+
+ /*
+ * Ignore write-combine; for now only return uncached mappings.
+ */
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot);
+}