Testplan

Testpoints

Stage V2 Testpoints

`LevelTriggeredIp_A`

Test: rv_plic_assert

If interrupt pending (ip) is triggered, and the level indicator is set to level triggered (le=0), then in the prvious clock cycle, the interrupt source (`intr_src_i) should be set to 1.

`LevelTriggeredIpWithClaim_A`

Test: rv_plic_assert

If intr_src_i is set to 1, level indicator is set to level triggered, and claim signal is not set, then at the next clock cycle ip will be triggered.

`IpStableAfterTriggered_A`

Test: rv_plic_assert

Once ip is set, it stays stable until is being claimed.

`IpClearAfterClaim_A`

Test: rv_plic_assert

Once ip is set and being claimed, its value is cleared to 0.

`IpStableAfterClaimed_A`

Test: rv_plic_assert

Once ip is cleared to 0, it stays stable until completed and being triggered again.

If interrupt is enabled (ie=1), interrupt pending is set (ip=1), interrupt input has the highest priority among the rest of the inputs, and its priority is above the threshold. Then in the next clock clcye, the irq_o should be triggered, and the irq_id_o will reflect the input ID.

`TriggerIrqBackwardCheck_A`

Test: rv_plic_assert

If irq_o is set to 1, then in the previous clock cycle, the corresponding ip should be set, ie should be enabled, and the interrupt source should above the threshold and have the highest priority.

`IdChangeWithIrq_A`

Test: rv_plic_assert

If irq_id_o signal is changed and the signal does not change to 0 (value 0 does not represent any interrupt source ID). Then either of the two condition should have happened:

irq_o is triggered
No interrupt triggered, ip is set and ie is enabled, interrupt source priority is the largest among the rest of the interrupt, but the interrupt source priority is smaller than the threshold

`fpv_csr_rw`

Test: rv_plic_fpv_csr_rw

Write assertions to verify all the CSRs from the TileLink. Each CSR will include a read assertion to ensure the read value from the TileLink is expected, and a write assertion to ensure the write value is updated correctly to DUT according to the register’s access.