1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/lib32/io.c b/arch/arm/lib32/io.c
new file mode 100644
index 0000000000..abfd887aac
--- /dev/null
+++ b/arch/arm/lib32/io.c
@@ -0,0 +1,50 @@
+#include <module.h>
+#include <linux/types.h>
+#include <io.h>
+
+/*
+ * Copy data from IO memory space to "real" memory space.
+ * This needs to be optimized.
+ */
+void memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
+{
+	unsigned char *t = to;
+	while (count) {
+		count--;
+		*t = readb(from);
+		t++;
+		from++;
+	}
+}
+
+/*
+ * Copy data from "real" memory space to IO memory space.
+ * This needs to be optimized.
+ */
+void memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
+{
+	const unsigned char *f = from;
+	while (count) {
+		count--;
+		writeb(*f, to);
+		f++;
+		to++;
+	}
+}
+
+/*
+ * "memset" on IO memory space.
+ * This needs to be optimized.
+ */
+void memset_io(volatile void __iomem *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);