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Diffstat (limited to 'arch/sh/drivers/dma/Kconfig')
| -rw-r--r-- | arch/sh/drivers/dma/Kconfig | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig new file mode 100644 index 00000000000..0f15216cd39 --- /dev/null +++ b/arch/sh/drivers/dma/Kconfig @@ -0,0 +1,55 @@ +menu "DMA support" + +config SH_DMA + bool "DMA controller (DMAC) support" + help + Selecting this option will provide same API as PC's Direct Memory + Access Controller(8237A) for SuperH DMAC. + + If unsure, say N. + +config NR_ONCHIP_DMA_CHANNELS + depends on SH_DMA + int "Number of on-chip DMAC channels" + default "4" + help + This allows you to specify the number of channels that the on-chip + DMAC supports. This will be 4 for SH7750/SH7751 and 8 for the + SH7750R/SH7751R. + +config NR_DMA_CHANNELS_BOOL + depends on SH_DMA + bool "Override default number of maximum DMA channels" + help + This allows you to forcibly update the maximum number of supported + DMA channels for a given board. If this is unset, this will default + to the number of channels that the on-chip DMAC has. + +config NR_DMA_CHANNELS + int "Maximum number of DMA channels" + depends on SH_DMA && NR_DMA_CHANNELS_BOOL + default NR_ONCHIP_DMA_CHANNELS + help + This allows you to specify the maximum number of DMA channels to + support. Setting this to a higher value allows for cascading DMACs + with additional channels. + +config DMA_PAGE_OPS + bool "Use DMAC for page copy/clear" + depends on SH_DMA && BROKEN + help + Selecting this option will use a dual-address mode configured channel + in the SH DMAC for copy_page()/clear_page(). Primarily a performance + hack. + +config DMA_PAGE_OPS_CHANNEL + depends on DMA_PAGE_OPS + int "DMA channel for sh memory-manager page copy/clear" + default "3" + help + This allows the specification of the dual address dma channel, + in case channel 3 is unavailable. On the SH4, channels 1,2, and 3 + are dual-address capable. + +endmenu + |