1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright (C) 2003, 2004 Ralf Baechle 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H 7*4882a593Smuzhiyun #define __ASM_MACH_GENERIC_MANGLE_PORT_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #define __swizzle_addr_b(port) (port) 10*4882a593Smuzhiyun #define __swizzle_addr_w(port) (port) 11*4882a593Smuzhiyun #define __swizzle_addr_l(port) (port) 12*4882a593Smuzhiyun #define __swizzle_addr_q(port) (port) 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* 15*4882a593Smuzhiyun * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; 16*4882a593Smuzhiyun * less sane hardware forces software to fiddle with this... 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * Regardless, if the host bus endianness mismatches that of PCI/ISA, then 19*4882a593Smuzhiyun * you can't have the numerical value of data and byte addresses within 20*4882a593Smuzhiyun * multibyte quantities both preserved at the same time. Hence two 21*4882a593Smuzhiyun * variations of functions: non-prefixed ones that preserve the value 22*4882a593Smuzhiyun * and prefixed ones that preserve byte addresses. The latters are 23*4882a593Smuzhiyun * typically used for moving raw data between a peripheral and memory (cf. 24*4882a593Smuzhiyun * string I/O functions), hence the "__mem_" prefix. 25*4882a593Smuzhiyun */ 26*4882a593Smuzhiyun #if defined(CONFIG_SWAP_IO_SPACE) 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun # define ioswabb(a, x) (x) 29*4882a593Smuzhiyun # define __mem_ioswabb(a, x) (x) 30*4882a593Smuzhiyun # define ioswabw(a, x) le16_to_cpu(x) 31*4882a593Smuzhiyun # define __mem_ioswabw(a, x) (x) 32*4882a593Smuzhiyun # define ioswabl(a, x) le32_to_cpu(x) 33*4882a593Smuzhiyun # define __mem_ioswabl(a, x) (x) 34*4882a593Smuzhiyun # define ioswabq(a, x) le64_to_cpu(x) 35*4882a593Smuzhiyun # define __mem_ioswabq(a, x) (x) 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #else 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun # define ioswabb(a, x) (x) 40*4882a593Smuzhiyun # define __mem_ioswabb(a, x) (x) 41*4882a593Smuzhiyun # define ioswabw(a, x) (x) 42*4882a593Smuzhiyun # define __mem_ioswabw(a, x) cpu_to_le16(x) 43*4882a593Smuzhiyun # define ioswabl(a, x) (x) 44*4882a593Smuzhiyun # define __mem_ioswabl(a, x) cpu_to_le32(x) 45*4882a593Smuzhiyun # define ioswabq(a, x) (x) 46*4882a593Smuzhiyun # define __mem_ioswabq(a, x) cpu_to_le32(x) 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun #endif 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */ 51