From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/sh/include/asm/cmpxchg-llsc.h | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 arch/sh/include/asm/cmpxchg-llsc.h (limited to 'arch/sh/include/asm/cmpxchg-llsc.h') diff --git a/arch/sh/include/asm/cmpxchg-llsc.h b/arch/sh/include/asm/cmpxchg-llsc.h new file mode 100644 index 000000000..d5270cd29 --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-llsc.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_CMPXCHG_LLSC_H +#define __ASM_SH_CMPXCHG_LLSC_H + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long retval; + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%2, %0 ! xchg_u32 \n\t" + "mov %0, %1 \n\t" + "mov %3, %0 \n\t" + "movco.l %0, @%2 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z"(tmp), "=&r" (retval) + : "r" (m), "r" (val) + : "t", "memory" + ); + + return retval; +} + +static inline unsigned long +__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) +{ + unsigned long retval; + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%2, %0 ! __cmpxchg_u32 \n\t" + "mov %0, %1 \n\t" + "cmp/eq %1, %3 \n\t" + "bf 2f \n\t" + "mov %4, %0 \n\t" + "2: \n\t" + "movco.l %0, @%2 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z" (tmp), "=&r" (retval) + : "r" (m), "r" (old), "r" (new) + : "t", "memory" + ); + + return retval; +} + +#include + +#endif /* __ASM_SH_CMPXCHG_LLSC_H */ -- cgit v1.2.3