Commit a924db7c authored by Michael Hennerich's avatar Michael Hennerich Committed by Bryan Wu
Browse files

Blackfin arch: Add option to priorize DMA over Core 



Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
parent 7735cefc

arch/blackfin/kernel/bfin_dma_5xx.c

+5 −0
Original line number Diff line number Diff line
@@ -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;

}

arch/blackfin/mach-bf548/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -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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