From 2411a3e2b5dfa4784bbe2548f8ef0ce1aea0379e Mon Sep 17 00:00:00 2001 From: Jason Jin Date: Thu, 4 Aug 2011 09:59:55 +0800 Subject: [PATCH 50/52] Update the DMA map function for CF platform In the DMA map, only the dcache need to be flushed. Flush both dcache and icache will decrease the system performance. Signed-off-by: Jason Jin --- arch/m68k/kernel/dma.c | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-) --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -94,10 +94,18 @@ void dma_sync_single_for_device(struct d { switch (dir) { case DMA_TO_DEVICE: - cache_push(handle, size); +#if defined(CONFIG_M5445X) || defined(CONFIG_M5441X) + flush_dcache_range(handle, handle + size); +#else + flush_dcache(); +#endif break; case DMA_FROM_DEVICE: - cache_clear(handle, size); +#if defined(CONFIG_M5445X) || defined(CONFIG_M5441X) + cf_dcache_inv_range(handle, handle + size); +#else + flush_dcache(); +#endif break; case PCI_DMA_BIDIRECTIONAL: flush_dcache();