/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2003, 2004 Ralf Baechle */ #ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H #define __ASM_MACH_GENERIC_MANGLE_PORT_H #define __swizzle_addr_b(port) (port) #define __swizzle_addr_w(port) (port) #define __swizzle_addr_l(port) (port) #define __swizzle_addr_q(port) (port) /* * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware; * less sane hardware forces software to fiddle with this... * * Regardless, if the host bus endianness mismatches that of PCI/ISA, then * you can't have the numerical value of data and byte addresses within * multibyte quantities both preserved at the same time. Hence two * variations of functions: non-prefixed ones that preserve the value * and prefixed ones that preserve byte addresses. The latters are * typically used for moving raw data between a peripheral and memory (cf. * string I/O functions), hence the "__mem_" prefix. */ #if defined(CONFIG_SWAP_IO_SPACE) # define ioswabb(a, x) (x) # define __mem_ioswabb(a, x) (x) # define ioswabw(a, x) le16_to_cpu((__force __le16)(x)) # define __mem_ioswabw(a, x) (x) # define ioswabl(a, x) le32_to_cpu((__force __le32)(x)) # define __mem_ioswabl(a, x) (x) # define ioswabq(a, x) le64_to_cpu((__force __le64)(x)) # define __mem_ioswabq(a, x) (x) #else # define ioswabb(a, x) (x) # define __mem_ioswabb(a, x) (x) # define ioswabw(a, x) (x) # define __mem_ioswabw(a, x) ((__force u16)cpu_to_le16(x)) # define ioswabl(a, x) (x) # define __mem_ioswabl(a, x) ((__force u32)cpu_to_le32(x)) # define ioswabq(a, x) (x) # define __mem_ioswabq(a, x) ((__force u64)cpu_to_le64(x)) #endif #endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */