MN10300: Handle cacheable PCI regions in pci_iomap()

Handle cacheable PCI regions in pci_iomap().  If IORESOURCE_CACHEABLE is set
then we AND away the 0x20000000 "flag".

Signed-off-by: David Howells <dhowells@redhat.com>

diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
index 139df8c53de83374a86189a8278d91a184d3e26c..70f1c06e29de4e3c9153985525ea1b30c6b2fd2f 100644 (file)
--- a/arch/mn10300/include/asm/io.h
+++ b/arch/mn10300/include/asm/io.h
@@ -258,7 +258,7 @@ static inline void __iomem *__ioremap(unsigned long offset, unsigned long size,
 
 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
 {
-       return (void __iomem *) offset;
+       return (void __iomem *)(offset & ~0x20000000);
 }
 
 /*

diff --git a/arch/mn10300/unit-asb2305/pci-iomap.c b/arch/mn10300/unit-asb2305/pci-iomap.c
new file mode 100644 (file)
index 0000000..bd65dae
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/pci-iomap.c
@@ -0,0 +1,35 @@
+/* ASB2305 PCI I/O mapping handler
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/pci.h>
+#include <linux/module.h>
+
+/*
+ * 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 ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM)) {
+               if (flags & IORESOURCE_CACHEABLE && !(flags & IORESOURCE_IO))
+                       return ioremap(start, len);
+               else
+                       return ioremap_nocache(start, len);
+       }
+
+       return NULL;
+}
+EXPORT_SYMBOL(pci_iomap);