patch-2.4.4 linux/arch/arm/kernel/io.c

• Lines: 50
• Date: Thu Apr 12 12:20:31 2001
• Orig file: v2.4.3/linux/arch/arm/kernel/io.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/arm/kernel/io.c linux/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);