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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2012-09-04 09:07:47 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-09-04 09:08:39 +0200 |
| commit | 72f26b709fc829ee34cb247078acb21f016520be (patch) | |
| tree | 53e13aabddcaa429933b1560a35c3f3641e37228 /arch/openrisc/include | |
| parent | e83bd384799e9b5e0561739a1f67ef554e5b5a32 (diff) | |
| download | barebox-72f26b709fc829ee34cb247078acb21f016520be.tar.gz barebox-72f26b709fc829ee34cb247078acb21f016520be.tar.xz | |
openrisc: Add unaligned support
Copied directly from Linux header file
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/openrisc/include')
| -rw-r--r-- | arch/openrisc/include/asm/unaligned.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/openrisc/include/asm/unaligned.h b/arch/openrisc/include/asm/unaligned.h new file mode 100644 index 0000000000..1141cbd6fd --- /dev/null +++ b/arch/openrisc/include/asm/unaligned.h @@ -0,0 +1,51 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> + * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> + * et al. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC_UNALIGNED_H +#define __ASM_OPENRISC_UNALIGNED_H + +/* + * This is copied from the generic implementation and the C-struct + * variant replaced with the memmove variant. The GCC compiler + * for the OR32 arch optimizes too aggressively for the C-struct + * variant to work, so use the memmove variant instead. + * + * It may be worth considering implementing the unaligned access + * exception handler and allowing unaligned accesses (access_ok.h)... + * not sure if it would be much of a performance win without further + * investigation. + */ +#include <asm/byteorder.h> + +#if defined(__LITTLE_ENDIAN) +# include <linux/unaligned/le_memmove.h> +# include <linux/unaligned/be_byteshift.h> +# include <linux/unaligned/generic.h> +# define get_unaligned __get_unaligned_le +# define put_unaligned __put_unaligned_le +#elif defined(__BIG_ENDIAN) +# include <linux/unaligned/be_memmove.h> +# include <linux/unaligned/le_byteshift.h> +# include <linux/unaligned/generic.h> +# define get_unaligned __get_unaligned_be +# define put_unaligned __put_unaligned_be +#else +# error need to define endianess +#endif + +#endif /* __ASM_OPENRISC_UNALIGNED_H */ |