Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a924db7c00655447c5228bd74da070c69b7cadbc
Commit: a924db7c00655447c5228bd74da070c69b7cadbc
Parent: 7735cefc4583175486685fced2f457fbe0fd5855
Author: Michael Hennerich <[EMAIL PROTECTED]>
AuthorDate: Fri Aug 3 17:43:29 2007 +0800
Committer: Bryan Wu <[EMAIL PROTECTED]>
CommitDate: Fri Aug 3 17:43:29 2007 +0800
Blackfin arch: Add option to priorize DMA over Core
Signed-off-by: Michael Hennerich <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
---
arch/blackfin/kernel/bfin_dma_5xx.c | 5 +++++
arch/blackfin/mach-bf548/Kconfig | 7 +++++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c
b/arch/blackfin/kernel/bfin_dma_5xx.c
index 7e22019..62f5a35 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -73,6 +73,11 @@ static int __init blackfin_dma_init(void)
/* Mark MEMDMA Channel 0 as requested since we're using it internally */
dma_ch[CH_MEM_STREAM0_DEST].chan_status = DMA_CHANNEL_REQUESTED;
dma_ch[CH_MEM_STREAM0_SRC].chan_status = DMA_CHANNEL_REQUESTED;
+
+#if defined(CONFIG_DEB_DMA_URGENT)
+ bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE()
+ | DEB1_URGENT | DEB2_URGENT | DEB3_URGENT);
+#endif
return 0;
}
diff --git a/arch/blackfin/mach-bf548/Kconfig b/arch/blackfin/mach-bf548/Kconfig
index 3976b7f..08d8dc8 100644
--- a/arch/blackfin/mach-bf548/Kconfig
+++ b/arch/blackfin/mach-bf548/Kconfig
@@ -2,6 +2,13 @@ if (BF54x)
menu "BF548 Specific Configuration"
+config DEB_DMA_URGENT
+ bool "DMA has priority over core for ext. accesses"
+ depends on BF54x
+ default n
+ help
+ Treat any DEB1, DEB2 and DEB3 request as Urgent
+
comment "Interrupt Priority Assignment"
menu "Priority"
-
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