1*23ff8633SDaniel Schwierzeck /* 2*23ff8633SDaniel Schwierzeck * Copyright (C) 2003, 2004 Ralf Baechle 3*23ff8633SDaniel Schwierzeck * 4*23ff8633SDaniel Schwierzeck * SPDX-License-Identifier: GPL-2.0 5*23ff8633SDaniel Schwierzeck */ 6*23ff8633SDaniel Schwierzeck #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H 7*23ff8633SDaniel Schwierzeck #define __ASM_MACH_GENERIC_MANGLE_PORT_H 8*23ff8633SDaniel Schwierzeck 9*23ff8633SDaniel Schwierzeck #define __swizzle_addr_b(port) (port) 10*23ff8633SDaniel Schwierzeck #define __swizzle_addr_w(port) (port) 11*23ff8633SDaniel Schwierzeck #define __swizzle_addr_l(port) (port) 12*23ff8633SDaniel Schwierzeck #define __swizzle_addr_q(port) (port) 13*23ff8633SDaniel Schwierzeck 14*23ff8633SDaniel Schwierzeck /* 15*23ff8633SDaniel Schwierzeck * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; 16*23ff8633SDaniel Schwierzeck * less sane hardware forces software to fiddle with this... 17*23ff8633SDaniel Schwierzeck * 18*23ff8633SDaniel Schwierzeck * Regardless, if the host bus endianness mismatches that of PCI/ISA, then 19*23ff8633SDaniel Schwierzeck * you can't have the numerical value of data and byte addresses within 20*23ff8633SDaniel Schwierzeck * multibyte quantities both preserved at the same time. Hence two 21*23ff8633SDaniel Schwierzeck * variations of functions: non-prefixed ones that preserve the value 22*23ff8633SDaniel Schwierzeck * and prefixed ones that preserve byte addresses. The latters are 23*23ff8633SDaniel Schwierzeck * typically used for moving raw data between a peripheral and memory (cf. 24*23ff8633SDaniel Schwierzeck * string I/O functions), hence the "__mem_" prefix. 25*23ff8633SDaniel Schwierzeck */ 26*23ff8633SDaniel Schwierzeck #if defined(CONFIG_SWAP_IO_SPACE) 27*23ff8633SDaniel Schwierzeck 28*23ff8633SDaniel Schwierzeck # define ioswabb(a, x) (x) 29*23ff8633SDaniel Schwierzeck # define __mem_ioswabb(a, x) (x) 30*23ff8633SDaniel Schwierzeck # define ioswabw(a, x) le16_to_cpu(x) 31*23ff8633SDaniel Schwierzeck # define __mem_ioswabw(a, x) (x) 32*23ff8633SDaniel Schwierzeck # define ioswabl(a, x) le32_to_cpu(x) 33*23ff8633SDaniel Schwierzeck # define __mem_ioswabl(a, x) (x) 34*23ff8633SDaniel Schwierzeck # define ioswabq(a, x) le64_to_cpu(x) 35*23ff8633SDaniel Schwierzeck # define __mem_ioswabq(a, x) (x) 36*23ff8633SDaniel Schwierzeck 37*23ff8633SDaniel Schwierzeck #else 38*23ff8633SDaniel Schwierzeck 39*23ff8633SDaniel Schwierzeck # define ioswabb(a, x) (x) 40*23ff8633SDaniel Schwierzeck # define __mem_ioswabb(a, x) (x) 41*23ff8633SDaniel Schwierzeck # define ioswabw(a, x) (x) 42*23ff8633SDaniel Schwierzeck # define __mem_ioswabw(a, x) cpu_to_le16(x) 43*23ff8633SDaniel Schwierzeck # define ioswabl(a, x) (x) 44*23ff8633SDaniel Schwierzeck # define __mem_ioswabl(a, x) cpu_to_le32(x) 45*23ff8633SDaniel Schwierzeck # define ioswabq(a, x) (x) 46*23ff8633SDaniel Schwierzeck # define __mem_ioswabq(a, x) cpu_to_le32(x) 47*23ff8633SDaniel Schwierzeck 48*23ff8633SDaniel Schwierzeck #endif 49*23ff8633SDaniel Schwierzeck 50*23ff8633SDaniel Schwierzeck #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */ 51