Driver to support Cluster DMA(CDMA) controller for ARCv3. For HS58 tested on nSIM and HAPS using 'dmatest' driver. For HS68 tested on nSIM using 'dmatest' driver.
Known limitations:
Don't specify 'test_buf_size' 'dmatest' parameter more then 750000 when L2$ is enabled. Looks like L2$ operations in cache-arcv3.c:scm_op_rgn() fails when sz > 750000. Probably it is restriction in HW. Otherwise the kernel will crash.
Driver to support Cluster DMA(CDMA) controller for ARCv3. For HS58 tested on nSIM and HAPS using 'dmatest' driver. For HS68 tested on nSIM using 'dmatest' driver.
Known limitations: Don't specify 'test_buf_size' 'dmatest' parameter more then 750000 when L2$ is enabled. Looks like L2$ operations in cache-arcv3.c:scm_op_rgn() fails when sz > 750000. Probably it is restriction in HW. Otherwise the kernel will crash.