diff options
| author | Arve Hjønnevåg <arve@android.com> | 2009-06-09 20:17:45 -0700 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2010-09-29 17:49:04 -0700 |
| commit | a1643c545a5d8ba61ce3a1ea316a1704ca3b71a3 (patch) | |
| tree | abf1a77fcffabab12da284171cf2f3b2e48125af /arch/arm/mm | |
| parent | cb93471ed5d924b6efdfe5d0215668a9b4b91c21 (diff) | |
[ARM] Optionally flush entire dcache from v6_dma_flush_range
If CACHE_FLUSH_RANGE_LIMIT is defined, then the entire dcache will
be flushed if the requested range is larger than this limit.
Change-Id: I29277d645a9d6716b1952cf3b870c78496261dd0
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/cache-v6.S | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S index 86aa689ef1aa..ea0894f62e07 100644 --- a/arch/arm/mm/cache-v6.S +++ b/arch/arm/mm/cache-v6.S @@ -256,6 +256,11 @@ v6_dma_clean_range: * - end - virtual end address of region */ ENTRY(v6_dma_flush_range) +#ifdef CONFIG_CACHE_FLUSH_RANGE_LIMIT + sub r2, r1, r0 + cmp r2, #CONFIG_CACHE_FLUSH_RANGE_LIMIT + bhi v6_dma_flush_dcache_all +#endif bic r0, r0, #D_CACHE_LINE_SIZE - 1 1: #ifdef CONFIG_DMA_CACHE_RWFO @@ -274,6 +279,18 @@ ENTRY(v6_dma_flush_range) mcr p15, 0, r0, c7, c10, 4 @ drain write buffer mov pc, lr +#ifdef CONFIG_CACHE_FLUSH_RANGE_LIMIT +v6_dma_flush_dcache_all: + mov r0, #0 +#ifdef HARVARD_CACHE + mcr p15, 0, r0, c7, c14, 0 @ D cache clean+invalidate +#else + mcr p15, 0, r0, c7, c15, 0 @ Cache clean+invalidate +#endif + mcr p15, 0, r0, c7, c10, 4 @ drain write buffer + mov pc, lr +#endif + /* * dma_map_area(start, size, dir) * - start - kernel virtual start address |