1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/kernel/io.c b/arch/arm/kernel/io.c
new file mode 100644
index 000000000000..34d6a867e368
--- /dev/null
+++ b/arch/arm/kernel/io.c
@@ -0,0 +1,49 @@
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+
+/*
+ * Copy data from IO memory space to "real" memory space.
+ * This needs to be optimized.
+ */
+void _memcpy_fromio(void * to, unsigned long from, size_t count)
+{
+	while (count) {
+		count--;
+		*(char *) to = readb(from);
+		((char *) to)++;
+		from++;
+	}
+}
+
+/*
+ * Copy data from "real" memory space to IO memory space.
+ * This needs to be optimized.
+ */
+void _memcpy_toio(unsigned long to, const void * from, size_t count)
+{
+	while (count) {
+		count--;
+		writeb(*(char *) from, to);
+		((char *) from)++;
+		to++;
+	}
+}
+
+/*
+ * "memset" on IO memory space.
+ * This needs to be optimized.
+ */
+void _memset_io(unsigned long dst, int c, size_t count)
+{
+	while (count) {
+		count--;
+		writeb(c, dst);
+		dst++;
+	}
+}
+
+EXPORT_SYMBOL(_memcpy_fromio);
+EXPORT_SYMBOL(_memcpy_toio);
+EXPORT_SYMBOL(_memset_io);