From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/nios2/include/asm/cmpxchg.h | 61 +++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 kernel/arch/nios2/include/asm/cmpxchg.h (limited to 'kernel/arch/nios2/include/asm/cmpxchg.h') diff --git a/kernel/arch/nios2/include/asm/cmpxchg.h b/kernel/arch/nios2/include/asm/cmpxchg.h new file mode 100644 index 000000000..859387115 --- /dev/null +++ b/kernel/arch/nios2/include/asm/cmpxchg.h @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2004 Microtronix Datacom Ltd. + * + * 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. + */ + +#ifndef _ASM_NIOS2_CMPXCHG_H +#define _ASM_NIOS2_CMPXCHG_H + +#include + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) + +struct __xchg_dummy { unsigned long a[100]; }; +#define __xg(x) ((volatile struct __xchg_dummy *)(x)) + +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, + int size) +{ + unsigned long tmp, flags; + + local_irq_save(flags); + + switch (size) { + case 1: + __asm__ __volatile__( + "ldb %0, %2\n" + "stb %1, %2\n" + : "=&r" (tmp) + : "r" (x), "m" (*__xg(ptr)) + : "memory"); + break; + case 2: + __asm__ __volatile__( + "ldh %0, %2\n" + "sth %1, %2\n" + : "=&r" (tmp) + : "r" (x), "m" (*__xg(ptr)) + : "memory"); + break; + case 4: + __asm__ __volatile__( + "ldw %0, %2\n" + "stw %1, %2\n" + : "=&r" (tmp) + : "r" (x), "m" (*__xg(ptr)) + : "memory"); + break; + } + + local_irq_restore(flags); + return tmp; +} + +#include +#include + +#endif /* _ASM_NIOS2_CMPXCHG_H */ -- cgit 1.2.3-korg