Sun Microsystems Netra CT Service Manual page 76

The dma_reg_test: Performs a walking ones bit test for control status register,
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address register, and byte count register of each channel. Verifies that the control
status register is set properly.
The dma_func_test: Validates the DMA capabilities and FIFOs. The test is
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executed in a DMA diagnostic loopback mode. It initializes the data of
transmitting memory with its address, performs a DMA read and write, and
verifies that the data received is correct. This is repeated for four channels.
CODE EXAMPLE 4-8
CODE EXAMPLE 4-8
Enter (0-14 tests, 15 -Quit, 16 -Menu) ===> 1
TEST= all_dma/ebus_test
SUBTEST= dma_reg_test
SUBTEST= dma_func_test
Enter (0-14 tests, 15 -Quit, 16 -Menu) ===>
4.7.8.3 Ethernet
The Ethernet diagnostic performs the following:
my_channel_reset resets the Ethernet channel.
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hme_reg_test performs Walk1 on the following registers set: global register 1,
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global register 2, bmac xif register, bmac tx register, and the mif register.
MAC_internal_loopback_test performs Ethernet channel engine internal
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loopback.
10_mb_xcvr_loopback_test enables the 10Base-T data present at the transmit
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MII data inputs to be routed back to the receive MII data outputs.
100_mb_phy_loopback_test enables MII transmit data to be routed to the MII
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receive data path.
100_mb_twister_loopback_test forces the twisted-pair transceiver into
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loopback mode.
4-30 Netra CT Server Service Manual • January 2004
identifies the EBus DMA/TCR registers output message.
EBus DMA/TCR Registers Output Message