DMA_reg_test

Performs a walking ones bit test for control status register, address register, and byte count register of each channel. Verifies that the control status register is set properly. 

DMA_func_test

Validates the DMA capabilities and FIFOs. Test is executed in a DMA diagnostic loopback mode. Initializes the data of transmitting memory with its address, performs a DMA read and write, and verifies that the data received is correct. Repeats for four channels.  

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TEST='all_dma/ebus_test'
SUBTEST='dma_reg_test'
SUBTEST='dma_func_test'
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