[coldfire]: switch to 2.6.38

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31546 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 37 insertions, 0 deletions

diff --git a/target/linux/coldfire/patches/050-Update-the-DMA-map-function-for-CF-platform.patch b/target/linux/coldfire/patches/050-Update-the-DMA-map-function-for-CF-platform.patch
new file mode 100644
index 000000000..a0a7ba7ee
--- /dev/null
+++ b/target/linux/coldfire/patches/050-Update-the-DMA-map-function-for-CF-platform.patch
@@ -0,0 +1,37 @@
+From 2411a3e2b5dfa4784bbe2548f8ef0ce1aea0379e Mon Sep 17 00:00:00 2001
+From: Jason Jin <Jason.jin@freescale.com>
+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 <Jason.jin@freescale.com>
+---
+ 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();