1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2003, 2004 Ralf Baechle
4  */
5 #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
6 #define __ASM_MACH_GENERIC_MANGLE_PORT_H
7 
8 #define __swizzle_addr_b(port)	(port)
9 #define __swizzle_addr_w(port)	(port)
10 #define __swizzle_addr_l(port)	(port)
11 #define __swizzle_addr_q(port)	(port)
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(a, x)		(x)
28 # define __mem_ioswabb(a, x)	(x)
29 # define ioswabw(a, x)		le16_to_cpu(x)
30 # define __mem_ioswabw(a, x)	(x)
31 # define ioswabl(a, x)		le32_to_cpu(x)
32 # define __mem_ioswabl(a, x)	(x)
33 # define ioswabq(a, x)		le64_to_cpu(x)
34 # define __mem_ioswabq(a, x)	(x)
35 
36 #else
37 
38 # define ioswabb(a, x)		(x)
39 # define __mem_ioswabb(a, x)	(x)
40 # define ioswabw(a, x)		(x)
41 # define __mem_ioswabw(a, x)	cpu_to_le16(x)
42 # define ioswabl(a, x)		(x)
43 # define __mem_ioswabl(a, x)	cpu_to_le32(x)
44 # define ioswabq(a, x)		(x)
45 # define __mem_ioswabq(a, x)	cpu_to_le32(x)
46 
47 #endif
48 
49 #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */
50