1 /* SPDX-License-Identifier: GPL-2.0 2 * 3 * SH version cribbed from the MIPS copy: 4 * 5 * Copyright (C) 2003, 2004 Ralf Baechle 6 */ 7 #ifndef __MACH_COMMON_MANGLE_PORT_H 8 #define __MACH_COMMON_MANGLE_PORT_H 9 10 /* 11 * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; 12 * less sane hardware forces software to fiddle with this... 13 * 14 * Regardless, if the host bus endianness mismatches that of PCI/ISA, then 15 * you can't have the numerical value of data and byte addresses within 16 * multibyte quantities both preserved at the same time. Hence two 17 * variations of functions: non-prefixed ones that preserve the value 18 * and prefixed ones that preserve byte addresses. The latters are 19 * typically used for moving raw data between a peripheral and memory (cf. 20 * string I/O functions), hence the "__mem_" prefix. 21 */ 22 #if defined(CONFIG_SWAP_IO_SPACE) 23 24 # define ioswabb(x) (x) 25 # define __mem_ioswabb(x) (x) 26 # define ioswabw(x) le16_to_cpu(x) 27 # define __mem_ioswabw(x) (x) 28 # define ioswabl(x) le32_to_cpu(x) 29 # define __mem_ioswabl(x) (x) 30 # define ioswabq(x) le64_to_cpu(x) 31 # define __mem_ioswabq(x) (x) 32 33 #else 34 35 # define ioswabb(x) (x) 36 # define __mem_ioswabb(x) (x) 37 # define ioswabw(x) (x) 38 # define __mem_ioswabw(x) cpu_to_le16(x) 39 # define ioswabl(x) (x) 40 # define __mem_ioswabl(x) cpu_to_le32(x) 41 # define ioswabq(x) (x) 42 # define __mem_ioswabq(x) cpu_to_le32(x) 43 44 #endif 45 46 #endif /* __MACH_COMMON_MANGLE_PORT_H */ 47
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