1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 *
 6 * Copyright (C) 2003, 2004 Ralf Baechle
 7 */
 8#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
 9#define __ASM_MACH_GENERIC_MANGLE_PORT_H
10
11#define __swizzle_addr_b(port)	(port)
12#define __swizzle_addr_w(port)	(port)
13#define __swizzle_addr_l(port)	(port)
14#define __swizzle_addr_q(port)	(port)
15
16/*
17 * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
18 * less sane hardware forces software to fiddle with this...
19 *
20 * Regardless, if the host bus endianness mismatches that of PCI/ISA, then
21 * you can't have the numerical value of data and byte addresses within
22 * multibyte quantities both preserved at the same time.  Hence two
23 * variations of functions: non-prefixed ones that preserve the value
24 * and prefixed ones that preserve byte addresses.  The latters are
25 * typically used for moving raw data between a peripheral and memory (cf.
26 * string I/O functions), hence the "__mem_" prefix.
27 */
28#if defined(CONFIG_SWAP_IO_SPACE)
29
30# define ioswabb(a, x)		(x)
31# define __mem_ioswabb(a, x)	(x)
32# define ioswabw(a, x)		le16_to_cpu(x)
33# define __mem_ioswabw(a, x)	(x)
34# define ioswabl(a, x)		le32_to_cpu(x)
35# define __mem_ioswabl(a, x)	(x)
36# define ioswabq(a, x)		le64_to_cpu(x)
37# define __mem_ioswabq(a, x)	(x)
38
39#else
40
41# define ioswabb(a, x)		(x)
42# define __mem_ioswabb(a, x)	(x)
43# define ioswabw(a, x)		(x)
44# define __mem_ioswabw(a, x)	cpu_to_le16(x)
45# define ioswabl(a, x)		(x)
46# define __mem_ioswabl(a, x)	cpu_to_le32(x)
47# define ioswabq(a, x)		(x)
48# define __mem_ioswabq(a, x)	cpu_to_le32(x)
49
50#endif
51
52#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */

 1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 *
 6 * Copyright (C) 2003, 2004 Ralf Baechle
 7 */
 8#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
 9#define __ASM_MACH_GENERIC_MANGLE_PORT_H
10
11#define __swizzle_addr_b(port)	(port)
12#define __swizzle_addr_w(port)	(port)
13#define __swizzle_addr_l(port)	(port)
14#define __swizzle_addr_q(port)	(port)
15
16/*
17 * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
18 * less sane hardware forces software to fiddle with this...
19 *
20 * Regardless, if the host bus endianness mismatches that of PCI/ISA, then
21 * you can't have the numerical value of data and byte addresses within
22 * multibyte quantities both preserved at the same time.  Hence two
23 * variations of functions: non-prefixed ones that preserve the value
24 * and prefixed ones that preserve byte addresses.  The latters are
25 * typically used for moving raw data between a peripheral and memory (cf.
26 * string I/O functions), hence the "__mem_" prefix.
27 */
28#if defined(CONFIG_SWAP_IO_SPACE)
29
30# define ioswabb(a, x)		(x)
31# define __mem_ioswabb(a, x)	(x)
32# define ioswabw(a, x)		le16_to_cpu((__force __le16)(x))
33# define __mem_ioswabw(a, x)	(x)
34# define ioswabl(a, x)		le32_to_cpu((__force __le32)(x))
35# define __mem_ioswabl(a, x)	(x)
36# define ioswabq(a, x)		le64_to_cpu((__force __le64)(x))
37# define __mem_ioswabq(a, x)	(x)
38
39#else
40
41# define ioswabb(a, x)		(x)
42# define __mem_ioswabb(a, x)	(x)
43# define ioswabw(a, x)		(x)
44# define __mem_ioswabw(a, x)	((__force u16)cpu_to_le16(x))
45# define ioswabl(a, x)		(x)
46# define __mem_ioswabl(a, x)	((__force u32)cpu_to_le32(x))
47# define ioswabq(a, x)		(x)
48# define __mem_ioswabq(a, x)	((__force u64)cpu_to_le64(x))
49
50#endif
51
52#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */