1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2003, 2004 Ralf Baechle 4 */ 5 #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H 6 #define __ASM_MACH_GENERIC_MANGLE_PORT_H 7 8 #define __swizzle_addr_b(port) (port) 9 #define __swizzle_addr_w(port) (port) 10 #define __swizzle_addr_l(port) (port) 11 #define __swizzle_addr_q(port) (port) 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(a, x) (x) 28 # define __mem_ioswabb(a, x) (x) 29 # define ioswabw(a, x) le16_to_cpu(x) 30 # define __mem_ioswabw(a, x) (x) 31 # define ioswabl(a, x) le32_to_cpu(x) 32 # define __mem_ioswabl(a, x) (x) 33 # define ioswabq(a, x) le64_to_cpu(x) 34 # define __mem_ioswabq(a, x) (x) 35 36 #else 37 38 # define ioswabb(a, x) (x) 39 # define __mem_ioswabb(a, x) (x) 40 # define ioswabw(a, x) (x) 41 # define __mem_ioswabw(a, x) cpu_to_le16(x) 42 # define ioswabl(a, x) (x) 43 # define __mem_ioswabl(a, x) cpu_to_le32(x) 44 # define ioswabq(a, x) (x) 45 # define __mem_ioswabq(a, x) cpu_to_le32(x) 46 47 #endif 48 49 #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */ 50
