1 files changed, 59 insertions, 0 deletions

diff --git a/arch/sh/kernel/io.c b/arch/sh/kernel/io.c
new file mode 100644
index 000000000000..d9932f25993b
--- /dev/null
+++ b/arch/sh/kernel/io.c
@@ -0,0 +1,59 @@
+/*
+ * linux/arch/sh/kernel/io.c
+ *
+ * Copyright (C) 2000  Stuart Menefy
+ *
+ * Provide real functions which expand to whatever the header file defined.
+ * Also definitions of machine independent IO functions.
+ */
+
+#include <asm/io.h>
+#include <linux/module.h>
+
+/*
+ * Copy data from IO memory space to "real" memory space.
+ * This needs to be optimized.
+ */
+void  memcpy_fromio(void * to, unsigned long from, unsigned long count)
+{
+        char *p = to;
+        while (count) {
+                count--;
+                *p = readb(from);
+                p++;
+                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, unsigned long count)
+{
+        const char *p = from;
+        while (count) {
+                count--;
+                writeb(*p, to);
+                p++;
+                to++;
+        }
+}
+ 
+/*
+ * "memset" on IO memory space.
+ * This needs to be optimized.
+ */
+void  memset_io(unsigned long dst, int c, unsigned long count)
+{
+        while (count) {
+                count--;
+                writeb(c, dst);
+                dst++;
+        }
+}
+
+EXPORT_SYMBOL(memcpy_fromio);
+EXPORT_SYMBOL(memcpy_toio);
+EXPORT_SYMBOL(memset_io);
+