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author | David S. Miller <davem@davemloft.net> | 2012-04-10 14:30:45 -0400 |
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committer | David S. Miller <davem@davemloft.net> | 2012-04-10 14:30:45 -0400 |
commit | 06eb4eafbdc0796d741d139a44f1253278da8611 (patch) | |
tree | fbdb44317130c371928154c9e6903e699fe2b995 /arch/sh/include/mach-common | |
parent | 32ed53b83ea5ec26a4dba90e18f5e0ff6c71eb48 (diff) | |
parent | f68e556e23d1a4176b563bcb25d8baf2c5313f91 (diff) | |
download | op-kernel-dev-06eb4eafbdc0796d741d139a44f1253278da8611.zip op-kernel-dev-06eb4eafbdc0796d741d139a44f1253278da8611.tar.gz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/sh/include/mach-common')
-rw-r--r-- | arch/sh/include/mach-common/mach/mangle-port.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/sh/include/mach-common/mach/mangle-port.h b/arch/sh/include/mach-common/mach/mangle-port.h new file mode 100644 index 0000000..4ca1769 --- /dev/null +++ b/arch/sh/include/mach-common/mach/mangle-port.h @@ -0,0 +1,49 @@ +/* + * 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 + */ +#ifndef __MACH_COMMON_MANGLE_PORT_H +#define __MACH_COMMON_MANGLE_PORT_H + +/* + * 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(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) + +#else + +# 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) + +#endif + +#endif /* __MACH_COMMON_MANGLE_PORT_H */ |