11da177e4SLinus Torvaldsmenu "DMA support" 21da177e4SLinus Torvalds 31da177e4SLinus Torvaldsconfig SH_DMA 41da177e4SLinus Torvalds bool "DMA controller (DMAC) support" 51da177e4SLinus Torvalds help 61da177e4SLinus Torvalds Selecting this option will provide same API as PC's Direct Memory 71da177e4SLinus Torvalds Access Controller(8237A) for SuperH DMAC. 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds If unsure, say N. 101da177e4SLinus Torvalds 111da177e4SLinus Torvaldsconfig NR_ONCHIP_DMA_CHANNELS 121da177e4SLinus Torvalds depends on SH_DMA 131da177e4SLinus Torvalds int "Number of on-chip DMAC channels" 145283ecb5SPaul Mundt default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R 155283ecb5SPaul Mundt default "12" if CPU_SUBTYPE_SH7780 161da177e4SLinus Torvalds default "4" 171da177e4SLinus Torvalds help 181da177e4SLinus Torvalds This allows you to specify the number of channels that the on-chip 191da177e4SLinus Torvalds DMAC supports. This will be 4 for SH7750/SH7751 and 8 for the 201da177e4SLinus Torvalds SH7750R/SH7751R. 211da177e4SLinus Torvalds 221da177e4SLinus Torvaldsconfig NR_DMA_CHANNELS_BOOL 231da177e4SLinus Torvalds depends on SH_DMA 241da177e4SLinus Torvalds bool "Override default number of maximum DMA channels" 251da177e4SLinus Torvalds help 261da177e4SLinus Torvalds This allows you to forcibly update the maximum number of supported 271da177e4SLinus Torvalds DMA channels for a given board. If this is unset, this will default 281da177e4SLinus Torvalds to the number of channels that the on-chip DMAC has. 291da177e4SLinus Torvalds 301da177e4SLinus Torvaldsconfig NR_DMA_CHANNELS 311da177e4SLinus Torvalds int "Maximum number of DMA channels" 321da177e4SLinus Torvalds depends on SH_DMA && NR_DMA_CHANNELS_BOOL 331da177e4SLinus Torvalds default NR_ONCHIP_DMA_CHANNELS 341da177e4SLinus Torvalds help 351da177e4SLinus Torvalds This allows you to specify the maximum number of DMA channels to 361da177e4SLinus Torvalds support. Setting this to a higher value allows for cascading DMACs 371da177e4SLinus Torvalds with additional channels. 381da177e4SLinus Torvalds 391da177e4SLinus Torvaldsconfig DMA_PAGE_OPS 401da177e4SLinus Torvalds bool "Use DMAC for page copy/clear" 411da177e4SLinus Torvalds depends on SH_DMA && BROKEN 421da177e4SLinus Torvalds help 431da177e4SLinus Torvalds Selecting this option will use a dual-address mode configured channel 441da177e4SLinus Torvalds in the SH DMAC for copy_page()/clear_page(). Primarily a performance 451da177e4SLinus Torvalds hack. 461da177e4SLinus Torvalds 471da177e4SLinus Torvaldsconfig DMA_PAGE_OPS_CHANNEL 481da177e4SLinus Torvalds depends on DMA_PAGE_OPS 491da177e4SLinus Torvalds int "DMA channel for sh memory-manager page copy/clear" 501da177e4SLinus Torvalds default "3" 511da177e4SLinus Torvalds help 521da177e4SLinus Torvalds This allows the specification of the dual address dma channel, 531da177e4SLinus Torvalds in case channel 3 is unavailable. On the SH4, channels 1,2, and 3 541da177e4SLinus Torvalds are dual-address capable. 551da177e4SLinus Torvalds 561da177e4SLinus Torvaldsendmenu 57