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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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716821c943
The generic code uses gcc built-ins which work fine so there's no benefit in implementing our own anymore. We can't completely remove the ld/st_le* functions as some historical cruft still uses them, but that's next on the radar Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_SWAB_H
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#define _ASM_POWERPC_SWAB_H
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#include <uapi/asm/swab.h>
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static __inline__ __u16 ld_le16(const volatile __u16 *addr)
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{
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__u16 val;
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__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
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{
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__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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static __inline__ __u32 ld_le32(const volatile __u32 *addr)
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{
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__u32 val;
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__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
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{
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__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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#endif /* _ASM_POWERPC_SWAB_H */
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