patch-2.3.17 linux/include/pcmcia/mem_op.h

• Lines: 134
• Date: Fri Sep 3 15:28:39 1999
• Orig file: v2.3.16/linux/include/pcmcia/mem_op.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.16/linux/include/pcmcia/mem_op.h linux/include/pcmcia/mem_op.h
@@ -0,0 +1,133 @@
+/*
+ * mem_op.h 1.10 1999/08/28 04:12:33
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License
+ * at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and
+ * limitations under the License. 
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dhinds@hyper.stanford.edu>.  Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU Public License version 2 (the "GPL"), in which
+ * case the provisions of the GPL are applicable instead of the
+ * above.  If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use
+ * your version of this file under the MPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice and
+ * other provisions required by the GPL.  If you do not delete the
+ * provisions above, a recipient may use your version of this file
+ * under either the MPL or the GPL.
+ */
+
+#ifndef _LINUX_MEM_OP_H
+#define _LINUX_MEM_OP_H
+
+#include <asm/uaccess.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(readl_ns(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);
+	writel_ns(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, const void *from, size_t n)
+{
+    size_t odd = (n & 1);
+    n -= odd;
+    while (n) {
+	*(u_short *)to = __raw_readw(from);
+	(char *)to += 2; (char *)from += 2; n -= 2;
+    }
+    if (odd)
+	*(u_char *)to = readb(from);
+}
+
+static inline void copy_to_pc(void *to, const void *from, size_t n)
+{
+    size_t odd = (n & 1);
+    n -= odd;
+    while (n) {
+	__raw_writew(*(u_short *)from, to);
+	(char *)to += 2; (char *)from += 2; n -= 2;
+    }
+    if (odd)
+	writeb(*(u_char *)from, to);
+}
+
+static inline void copy_pc_to_user(void *to, const void *from, size_t n)
+{
+    size_t odd = (n & 1);
+    n -= odd;
+    while (n) {
+	put_user(__raw_readw(from), (short *)to);
+	(char *)to += 2; (char *)from += 2; n -= 2;
+    }
+    if (odd)
+	put_user(readb(from), (char *)to);
+}
+
+static inline void copy_user_to_pc(void *to, const void *from, size_t n)
+{
+    short s;
+    char c;
+    size_t odd = (n & 1);
+    n -= odd;
+    while (n) {
+	get_user(s, (short *)from);
+	__raw_writew(s, to);
+	(char *)to += 2; (char *)from += 2; n -= 2;
+    }
+    if (odd) {
+	get_user(c, (char *)from);
+	writeb(c, to);
+    }
+}
+
+#endif /* UNSAFE_MEMCPY */
+
+#endif /* _LINUX_MEM_OP_H */