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authorDavid Howells <dhowells@redhat.com>2012-12-12 15:36:39 +0000
committerDavid Howells <dhowells@redhat.com>2012-12-12 15:46:14 +0000
commit83c2dc15ce824450e7044b9f90cd529c25747ae0 (patch)
treecf6fb2eb5560002e0f25115128764a588b5d12c6 /arch/mn10300
parent0369c360e5825e34ff58c140aa7fbb9855ad1e4a (diff)
downloadlinux-linaro-stable-83c2dc15ce824450e7044b9f90cd529c25747ae0.tar.gz
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>
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/include/asm/io.h2
-rw-r--r--arch/mn10300/unit-asb2305/pci-iomap.c35
2 files changed, 36 insertions, 1 deletions
diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
index 139df8c53de8..70f1c06e29de 100644
--- 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
index 000000000000..bd65dae17f32
--- /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);