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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/mips/include/uapi/asm/swab.h | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | arch/mips/include/uapi/asm/swab.h | 71 |
1 files changed, 71 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 000000000..d6795fe4e --- /dev/null +++ b/arch/mips/include/uapi/asm/swab.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * 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__ + +#if !defined(__mips16) && \ + ((defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \ + defined(_MIPS_ARCH_LOONGSON3A)) + +static inline __attribute_const__ __u16 __arch_swab16(__u16 x) +{ + __asm__( + " .set push \n" + " .set arch=mips32r2 \n" + " wsbh %0, %1 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab16 __arch_swab16 + +static inline __attribute_const__ __u32 __arch_swab32(__u32 x) +{ + __asm__( + " .set push \n" + " .set arch=mips32r2 \n" + " wsbh %0, %1 \n" + " rotr %0, %0, 16 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab32 __arch_swab32 + +/* + * Having already checked for MIPS R2, enable the optimized version for + * 64-bit kernel on r2 CPUs. + */ +#ifdef __mips64 +static inline __attribute_const__ __u64 __arch_swab64(__u64 x) +{ + __asm__( + " .set push \n" + " .set arch=mips64r2 \n" + " dsbh %0, %1 \n" + " dshd %0, %0 \n" + " .set pop \n" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab64 __arch_swab64 +#endif /* __mips64 */ +#endif /* (not __mips16) and (MIPS R2 or newer or Loongson 3A) */ +#endif /* _ASM_SWAB_H */ |