diff options
author | David Howells <dhowells@redhat.com> | 2012-10-09 09:47:14 +0100 |
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committer | David Howells <dhowells@redhat.com> | 2012-10-09 09:47:14 +0100 |
commit | 61730c538f8281efa7ac12596da9f3f9a31b9272 (patch) | |
tree | cda3febfc512cd4dd667601427b42b612d7ea6d7 /arch/mips/include/uapi/asm/swab.h | |
parent | 9e2d8656f5e8aa214e66b462680cf86b210b74a8 (diff) |
UAPI: (Scripted) Disintegrate arch/mips/include/asm
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch/mips/include/uapi/asm/swab.h')
-rw-r--r-- | arch/mips/include/uapi/asm/swab.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/include/uapi/asm/swab.h b/arch/mips/include/uapi/asm/swab.h new file mode 100644 index 00000000000..97c2f81b4b4 --- /dev/null +++ b/arch/mips/include/uapi/asm/swab.h @@ -0,0 +1,59 @@ +/* + * 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) 1996, 99, 2003 by Ralf Baechle + */ +#ifndef _ASM_SWAB_H +#define _ASM_SWAB_H + +#include <linux/compiler.h> +#include <linux/types.h> + +#define __SWAB_64_THRU_32__ + +#ifdef CONFIG_CPU_MIPSR2 + +static inline __attribute_const__ __u16 __arch_swab16(__u16 x) +{ + __asm__( + " wsbh %0, %1 \n" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab16 __arch_swab16 + +static inline __attribute_const__ __u32 __arch_swab32(__u32 x) +{ + __asm__( + " wsbh %0, %1 \n" + " rotr %0, %0, 16 \n" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab32 __arch_swab32 + +/* + * Having already checked for CONFIG_CPU_MIPSR2, enable the + * optimized version for 64-bit kernel on r2 CPUs. + */ +#ifdef CONFIG_64BIT +static inline __attribute_const__ __u64 __arch_swab64(__u64 x) +{ + __asm__( + " dsbh %0, %1\n" + " dshd %0, %0" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab64 __arch_swab64 +#endif /* CONFIG_64BIT */ +#endif /* CONFIG_CPU_MIPSR2 */ +#endif /* _ASM_SWAB_H */ |