4 bool "DMA controller (DMAC) support"
6 Selecting this option will provide same API as PC's Direct Memory
7 Access Controller(8237A) for SuperH DMAC.
11 config NR_ONCHIP_DMA_CHANNELS
13 int "Number of on-chip DMAC channels"
14 default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R
15 default "12" if CPU_SUBTYPE_SH7780
18 This allows you to specify the number of channels that the on-chip
19 DMAC supports. This will be 4 for SH7750/SH7751 and 8 for the
22 config NR_DMA_CHANNELS_BOOL
24 bool "Override default number of maximum DMA channels"
26 This allows you to forcibly update the maximum number of supported
27 DMA channels for a given board. If this is unset, this will default
28 to the number of channels that the on-chip DMAC has.
30 config NR_DMA_CHANNELS
31 int "Maximum number of DMA channels"
32 depends on SH_DMA && NR_DMA_CHANNELS_BOOL
33 default NR_ONCHIP_DMA_CHANNELS
35 This allows you to specify the maximum number of DMA channels to
36 support. Setting this to a higher value allows for cascading DMACs
37 with additional channels.
40 bool "Use DMAC for page copy/clear"
41 depends on SH_DMA && BROKEN
43 Selecting this option will use a dual-address mode configured channel
44 in the SH DMAC for copy_page()/clear_page(). Primarily a performance
47 config DMA_PAGE_OPS_CHANNEL
48 depends on DMA_PAGE_OPS
49 int "DMA channel for sh memory-manager page copy/clear"
52 This allows the specification of the dual address dma channel,
53 in case channel 3 is unavailable. On the SH4, channels 1,2, and 3
54 are dual-address capable.