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| author | Michael Hennerich <michael.hennerich@analog.com> | 2007-08-03 17:43:29 +0800 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-08-03 17:43:29 +0800 |
| commit | a924db7c00655447c5228bd74da070c69b7cadbc (patch) | |
| tree | 5e19fb9a35edcc4b0066fe529d3c9f8f828f147c /arch/blackfin | |
| parent | 7735cefc4583175486685fced2f457fbe0fd5855 (diff) | |
| download | linux-stable-a924db7c00655447c5228bd74da070c69b7cadbc.tar.gz linux-stable-a924db7c00655447c5228bd74da070c69b7cadbc.tar.bz2 linux-stable-a924db7c00655447c5228bd74da070c69b7cadbc.zip | |
Blackfin arch: Add option to priorize DMA over Core
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/kernel/bfin_dma_5xx.c | 5 | ||||
| -rw-r--r-- | 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 7e2201908356..62f5a35c13ee 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 3976b7f523c3..08d8dc83701c 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" |