1/*
2 * SH version cribbed from the MIPS copy:
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2003, 2004 Ralf Baechle
9 */
10#ifndef __MACH_COMMON_MANGLE_PORT_H
11#define __MACH_COMMON_MANGLE_PORT_H
12
13/*
14 * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
15 * less sane hardware forces software to fiddle with this...
16 *
17 * Regardless, if the host bus endianness mismatches that of PCI/ISA, then
18 * you can't have the numerical value of data and byte addresses within
19 * multibyte quantities both preserved at the same time.  Hence two
20 * variations of functions: non-prefixed ones that preserve the value
21 * and prefixed ones that preserve byte addresses.  The latters are
22 * typically used for moving raw data between a peripheral and memory (cf.
23 * string I/O functions), hence the "__mem_" prefix.
24 */
25#if defined(CONFIG_SWAP_IO_SPACE)
26
27# define ioswabb(x)		(x)
28# define __mem_ioswabb(x)	(x)
29# define ioswabw(x)		le16_to_cpu(x)
30# define __mem_ioswabw(x)	(x)
31# define ioswabl(x)		le32_to_cpu(x)
32# define __mem_ioswabl(x)	(x)
33# define ioswabq(x)		le64_to_cpu(x)
34# define __mem_ioswabq(x)	(x)
35
36#else
37
38# define ioswabb(x)		(x)
39# define __mem_ioswabb(x)	(x)
40# define ioswabw(x)		(x)
41# define __mem_ioswabw(x)	cpu_to_le16(x)
42# define ioswabl(x)		(x)
43# define __mem_ioswabl(x)	cpu_to_le32(x)
44# define ioswabq(x)		(x)
45# define __mem_ioswabq(x)	cpu_to_le32(x)
46
47#endif
48
49#endif /* __MACH_COMMON_MANGLE_PORT_H */
50