target/linux/coldfire/patches/050-Update-the-DMA-map-function-for-CF-platform.patch

   1 From 2411a3e2b5dfa4784bbe2548f8ef0ce1aea0379e Mon Sep 17 00:00:00 2001
   2 From: Jason Jin <Jason.jin@freescale.com>
   3 Date: Thu, 4 Aug 2011 09:59:55 +0800
   4 Subject: [PATCH 50/52] Update the DMA map function for CF platform
   5
   6 In the DMA map, only the dcache need to be flushed.
   7 Flush both dcache and icache will decrease the system
   8 performance.
   9
  10 Signed-off-by: Jason Jin <Jason.jin@freescale.com>
  11 ---
  12  arch/m68k/kernel/dma.c |   12 ++++++++++--
  13  1 files changed, 10 insertions(+), 2 deletions(-)
  14
  15 --- a/arch/m68k/kernel/dma.c
  16 +++ b/arch/m68k/kernel/dma.c
  17 @@ -94,10 +94,18 @@ void dma_sync_single_for_device(struct d
  18  {
  19         switch (dir) {
  20         case DMA_TO_DEVICE:
  21 -               cache_push(handle, size);
  22 +#if defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
  23 +               flush_dcache_range(handle, handle + size);
  24 +#else
  25 +               flush_dcache();
  26 +#endif
  27                 break;
  28         case DMA_FROM_DEVICE:
  29 -               cache_clear(handle, size);
  30 +#if defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
  31 +               cf_dcache_inv_range(handle, handle + size);
  32 +#else
  33 +               flush_dcache();
  34 +#endif
  35                 break;
  36         case PCI_DMA_BIDIRECTIONAL:
  37                 flush_dcache();