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