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