This patch defines ARCH_HAS_BARRIERS for the OMAP4 platform if CACHE_L2X0 is enabled and adds the mach/barriers.h file. The mb() and wmb() barriers perform an L2 cache sync in addition to the DSB. The patch is based on top of Catalin's below series - [PATCH v3 0/4] ARM mandatory barriers - http://permalink.gmane.org/gmane.linux.ports.arm.kernel/75425 CC: Catalin Marinas <catalin.marinas@xxxxxxx> CC: Tony Lindgren <tony@xxxxxxxxxxx> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx> --- arch/arm/mach-omap2/include/mach/barriers.h | 32 +++++++++++++++++++++++++++ arch/arm/plat-omap/Kconfig | 1 + 2 files changed, 33 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-omap2/include/mach/barriers.h diff --git a/arch/arm/mach-omap2/include/mach/barriers.h b/arch/arm/mach-omap2/include/mach/barriers.h new file mode 100644 index 0000000..e29aebf --- /dev/null +++ b/arch/arm/mach-omap2/include/mach/barriers.h @@ -0,0 +1,32 @@ +/* + * omap barriers.h + * + * Copyright (C) 2010 Texas Instruments Ltd. + * Copyright (C) 2010 ARM Ltd. + * Written by Santosh Shilimkar <santosh.shilimkar@xxxxxx> + * based on realview version of Catalin Marinas <catalin.marinas@xxxxxxx> + * + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __MACH_BARRIERS_H +#define __MACH_BARRIERS_H + +#include <asm/outercache.h> + +#define rmb() dmb() +#define wmb() do { dsb(); outer_sync(); } while (0) +#define mb() wmb() + +#endif /* __MACH_BARRIERS_H */ diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index 6da796e..4812da4 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -38,6 +38,7 @@ config ARCH_OMAP4 depends on ARCH_OMAP2PLUS select CPU_V7 select ARM_GIC + select ARCH_HAS_BARRIERS if CACHE_L2X0 endchoice -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
