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 #include <asm/byteorder.h>
12
13 #ifdef __BIG_ENDIAN
14
15 static inline bool __should_swizzle_bits(volatile void *a)
16 {
17 extern const bool octeon_should_swizzle_table[];
18 u64 did = ((u64)(uintptr_t)a >> 40) & 0xff;
19
20 return octeon_should_swizzle_table[did];
21 }
22
23 # define __swizzle_addr_b(port) (port)
24 # define __swizzle_addr_w(port) (port)
25 # define __swizzle_addr_l(port) (port)
26 # define __swizzle_addr_q(port) (port)
27
28 #else /* __LITTLE_ENDIAN */
29
30 #define __should_swizzle_bits(a) false
31
32 static inline bool __should_swizzle_addr(u64 p)
33 {
34 /* boot bus? */
35 return ((p >> 40) & 0xff) == 0;
36 }
37
38 # define __swizzle_addr_b(port) \
39 (__should_swizzle_addr(port) ? (port) ^ 7 : (port))
40 # define __swizzle_addr_w(port) \
41 (__should_swizzle_addr(port) ? (port) ^ 6 : (port))
42 # define __swizzle_addr_l(port) \
43 (__should_swizzle_addr(port) ? (port) ^ 4 : (port))
44 # define __swizzle_addr_q(port) (port)
45
46 #endif /* __BIG_ENDIAN */
47
48
49 # define ioswabb(a, x) (x)
50 # define __mem_ioswabb(a, x) (x)
51 # define ioswabw(a, x) (__should_swizzle_bits(a) ? \
52 le16_to_cpu((__force __le16)(x)) : \
53 (x))
54 # define __mem_ioswabw(a, x) (x)
55 # define ioswabl(a, x) (__should_swizzle_bits(a) ? \
56 le32_to_cpu((__force __le32)(x)) : \
57 (x))
58 # define __mem_ioswabl(a, x) (x)
59 # define ioswabq(a, x) (__should_swizzle_bits(a) ? \
60 le64_to_cpu((__force __le64)(x)) : \
61 (x))
62 # define __mem_ioswabq(a, x) (x)
63
64 #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */
65
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