blob: 4ca1769a0f12938e7de7589f8a3eec80b08a889b [file] [log] [blame]
* SH version cribbed from the MIPS copy:
* 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
* 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.
# define ioswabb(x) (x)
# define __mem_ioswabb(x) (x)
# define ioswabw(x) le16_to_cpu(x)
# define __mem_ioswabw(x) (x)
# define ioswabl(x) le32_to_cpu(x)
# define __mem_ioswabl(x) (x)
# define ioswabq(x) le64_to_cpu(x)
# define __mem_ioswabq(x) (x)
# define ioswabb(x) (x)
# define __mem_ioswabb(x) (x)
# define ioswabw(x) (x)
# define __mem_ioswabw(x) cpu_to_le16(x)
# define ioswabl(x) (x)
# define __mem_ioswabl(x) cpu_to_le32(x)
# define ioswabq(x) (x)
# define __mem_ioswabq(x) cpu_to_le32(x)