[U-Boot] [PATCH v3 3/4] armv7: stronger barrier for cache-maintenance operations

Aneesh V
2011-08-11T14:35:44Z

set-way operations need a DSB after them to ensure the
operation is complete. DMB may not be enough. Use DSB
after all operations instead of DMB.

Signed-off-by: Aneesh V <aneesh@ti.com>
---
arch/arm/cpu/armv7/cache_v7.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/cpu/armv7/cache_v7.c b/arch/arm/cpu/armv7/cache_v7.c
index 3e1e1bf..665f025 100644
--- a/arch/arm/cpu/armv7/cache_v7.c
+++ b/arch/arm/cpu/armv7/cache_v7.c
@@ -81,8 +81,8 @@ static void v7_inval_dcache_level_setway(u32 level, u32 num_sets,
: : "r" (setway));
}
}
- /* DMB to make sure the operation is complete */
- CP15DMB;
+ /* DSB to make sure the operation is complete */
+ CP15DSB;
}

static void v7_clean_inval_dcache_level_setway(u32 level, u32 num_sets,
@@ -108,8 +108,8 @@ static void v7_clean_inval_dcache_level_setway(u32 level, u32 num_sets,
: : "r" (setway));
}
}
- /* DMB to make sure the operation is complete */
- CP15DMB;
+ /* DSB to make sure the operation is complete */
+ CP15DSB;
}

static void v7_maint_dcache_level_setway(u32 level, u32 operation)
@@ -227,8 +227,8 @@ static void v7_dcache_maint_range(u32 start, u32 stop, u32 range_op)
break;
}

- /* DMB to make sure the operation is complete */
- CP15DMB;
+ /* DSB to make sure the operation is complete */
+ CP15DSB;
}

/* Invalidate TLB */
--
1.7.0.4