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 */ 50