| Paul Mundt | b7e68d6 | 2012-03-29 16:05:10 +0900 | [diff] [blame] | 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 */ |