From 10b663aef1c24794d32141be86b4dfcc64293bd0 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Mon, 5 Mar 2012 11:49:34 +0000 Subject: arm64: Miscellaneous header files This patch introduces a few AArch64-specific header files together with Kbuild entries for generic headers. Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas Acked-by: Tony Lindgren Acked-by: Nicolas Pitre Acked-by: Olof Johansson Acked-by: Santosh Shilimkar Acked-by: Arnd Bergmann --- arch/arm64/include/asm/barrier.h | 52 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/arm64/include/asm/barrier.h (limited to 'arch/arm64/include/asm/barrier.h') diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h new file mode 100644 index 000000000000..d4a63338a53c --- /dev/null +++ b/arch/arm64/include/asm/barrier.h @@ -0,0 +1,52 @@ +/* + * Based on arch/arm/include/asm/barrier.h + * + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#ifndef __ASM_BARRIER_H +#define __ASM_BARRIER_H + +#ifndef __ASSEMBLY__ + +#define sev() asm volatile("sev" : : : "memory") +#define wfe() asm volatile("wfe" : : : "memory") +#define wfi() asm volatile("wfi" : : : "memory") + +#define isb() asm volatile("isb" : : : "memory") +#define dsb() asm volatile("dsb sy" : : : "memory") + +#define mb() dsb() +#define rmb() asm volatile("dsb ld" : : : "memory") +#define wmb() asm volatile("dsb st" : : : "memory") + +#ifndef CONFIG_SMP +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#else +#define smp_mb() asm volatile("dmb ish" : : : "memory") +#define smp_rmb() asm volatile("dmb ishld" : : : "memory") +#define smp_wmb() asm volatile("dmb ishst" : : : "memory") +#endif + +#define read_barrier_depends() do { } while(0) +#define smp_read_barrier_depends() do { } while(0) + +#define set_mb(var, value) do { var = value; smp_mb(); } while (0) +#define nop() asm volatile("nop"); + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_BARRIER_H */ -- cgit v1.2.3