1 files changed, 116 insertions, 0 deletions
diff --git a/include/pcmcia/mem_op.h b/include/pcmcia/mem_op.h
new file mode 100644
index 0000000..8d19b94
--- /dev/null
+++ b/include/pcmcia/mem_op.h
@@ -0,0 +1,116 @@
+/*
+ * mem_op.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+ *
+ * (C) 1999             David A. Hinds
+ */
+
+#ifndef _LINUX_MEM_OP_H
+#define _LINUX_MEM_OP_H
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/*
+   If UNSAFE_MEMCPY is defined, we use the (optimized) system routines
+   to copy between a card and kernel memory.  These routines do 32-bit
+   operations which may not work with all PCMCIA controllers.  The
+   safe versions defined here will do only 8-bit and 16-bit accesses.
+*/
+
+#ifdef UNSAFE_MEMCPY
+
+#define copy_from_pc memcpy_fromio
+#define copy_to_pc memcpy_toio
+
+static inline void copy_pc_to_user(void *to, const void *from, size_t n)
+{
+    size_t odd = (n & 3);
+    n -= odd;
+    while (n) {
+	put_user(__raw_readl(from), (int *)to);
+	(char *)from += 4; (char *)to += 4; n -= 4;
+    }
+    while (odd--)
+	put_user(readb((char *)from++), (char *)to++);
+}
+
+static inline void copy_user_to_pc(void *to, const void *from, size_t n)
+{
+    int l;
+    char c;
+    size_t odd = (n & 3);
+    n -= odd;
+    while (n) {
+	get_user(l, (int *)from);
+	__raw_writel(l, to);
+	(char *)to += 4; (char *)from += 4; n -= 4;
+    }
+    while (odd--) {
+	get_user(c, (char *)from++);
+	writeb(c, (char *)to++);
+    }
+}
+
+#else /* UNSAFE_MEMCPY */
+
+static inline void copy_from_pc(void *to, void __iomem *from, size_t n)
+{
+	__u16 *t = to;
+	__u16 __iomem *f = from;
+	size_t odd = (n & 1);
+	for (n >>= 1; n; n--)
+		*t++ = __raw_readw(f++);
+	if (odd)
+		*(__u8 *)t = readb(f);
+}
+
+static inline void copy_to_pc(void __iomem *to, const void *from, size_t n)
+{
+	__u16 __iomem *t = to;
+	const __u16 *f = from;
+	size_t odd = (n & 1);
+	for (n >>= 1; n ; n--)
+		__raw_writew(*f++, t++);
+	if (odd)
+		writeb(*(__u8 *)f, t);
+}
+
+static inline void copy_pc_to_user(void __user *to, void __iomem *from, size_t n)
+{
+	__u16 __user *t = to;
+	__u16 __iomem *f = from;
+	size_t odd = (n & 1);
+	for (n >>= 1; n ; n--)
+		put_user(__raw_readw(f++), t++);
+	if (odd)
+		put_user(readb(f), (char __user *)t);
+}
+
+static inline void copy_user_to_pc(void __iomem *to, void __user *from, size_t n)
+{
+	__u16 __user *f = from;
+	__u16 __iomem *t = to;
+	short s;
+	char c;
+	size_t odd = (n & 1);
+	for (n >>= 1; n; n--) {
+		get_user(s, f++);
+		__raw_writew(s, t++);
+	}
+	if (odd) {
+		get_user(c, (char __user *)f);
+		writeb(c, t);
+	}
+}
+
+#endif /* UNSAFE_MEMCPY */
+
+#endif /* _LINUX_MEM_OP_H */