1 files changed, 23 insertions, 0 deletions

diff --git a/arch/x86_64/lib/io.c b/arch/x86_64/lib/io.c
new file mode 100644
index 000000000000..87b4a4e18039
--- /dev/null
+++ b/arch/x86_64/lib/io.c
@@ -0,0 +1,23 @@
+#include <linux/string.h>
+#include <asm/io.h>
+#include <linux/module.h>
+
+void __memcpy_toio(unsigned long dst,const void*src,unsigned len)
+{
+        __inline_memcpy((void *) dst,src,len);
+}
+EXPORT_SYMBOL(__memcpy_toio);
+
+void __memcpy_fromio(void *dst,unsigned long src,unsigned len)
+{
+        __inline_memcpy(dst,(const void *) src,len);
+}
+EXPORT_SYMBOL(__memcpy_fromio);
+
+void memset_io(volatile void __iomem *a, int b, size_t c)
+{
+        /* XXX: memset can mangle the IO patterns quite a bit.
+           perhaps it would be better to use a dumb one */
+        memset((void *)a,b,c);
+}
+EXPORT_SYMBOL(memset_io);