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- From 2411a3e2b5dfa4784bbe2548f8ef0ce1aea0379e Mon Sep 17 00:00:00 2001
- From: Jason Jin <[email protected]>
- 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 <[email protected]>
- ---
- 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();
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