1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2003, 2004 Ralf Baechle 7 */ 8 #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H 9 #define __ASM_MACH_GENERIC_MANGLE_PORT_H 10 11 #define __swizzle_addr_b(port) (port) 12 #define __swizzle_addr_w(port) (port) 13 #define __swizzle_addr_l(port) (port) 14 #define __swizzle_addr_q(port) (port) 15 16 /* 17 * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; 18 * less sane hardware forces software to fiddle with this... 19 * 20 * Regardless, if the host bus endianness mismatches that of PCI/ISA, then 21 * you can't have the numerical value of data and byte addresses within 22 * multibyte quantities both preserved at the same time. Hence two 23 * variations of functions: non-prefixed ones that preserve the value 24 * and prefixed ones that preserve byte addresses. The latters are 25 * typically used for moving raw data between a peripheral and memory (cf. 26 * string I/O functions), hence the "__mem_" prefix. 27 */ 28 #if defined(CONFIG_SWAP_IO_SPACE) 29 30 # define ioswabb(a, x) (x) 31 # define __mem_ioswabb(a, x) (x) 32 # define ioswabw(a, x) le16_to_cpu((__force __le16)(x)) 33 # define __mem_ioswabw(a, x) (x) 34 # define ioswabl(a, x) le32_to_cpu((__force __le32)(x)) 35 # define __mem_ioswabl(a, x) (x) 36 # define ioswabq(a, x) le64_to_cpu((__force __le64)(x)) 37 # define __mem_ioswabq(a, x) (x) 38 39 #else 40 41 # define ioswabb(a, x) (x) 42 # define __mem_ioswabb(a, x) (x) 43 # define ioswabw(a, x) (x) 44 # define __mem_ioswabw(a, x) ((__force u16)cpu_to_le16(x)) 45 # define ioswabl(a, x) (x) 46 # define __mem_ioswabl(a, x) ((__force u32)cpu_to_le32(x)) 47 # define ioswabq(a, x) (x) 48 # define __mem_ioswabq(a, x) ((__force u64)cpu_to_le64(x)) 49 50 #endif 51 52 #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */ 53