Add alert handler to ot_earlgrey #110
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rivos-eblot
requested changes
Jan 22, 2025
Connect the alerts for each of the OpenTitan Earlgrey devices to the alert handler. This is based on the mappings found in the autogenerated `hw/top_earlgrey/sw/autogen/top_earlgrey.h` file for the Earlgrey top found in the OpenTitan repository. Signed-off-by: Alex Jones <[email protected]>
Connects GPIO signals for the four different escalation severities of OpenTitan Earlgrey's Alert handler. For now, escalation signal 3 (phase 3) connects to the pwrmgr, where it causes a shutdown as is the default in Darjeeling. In reality, the alert handler should cause a reset in phase 3 and populate the rstmgr's `reset_info` accordingly, but this requires additional work in other blocks, and as such we simply leave this connected to the pwrmgr shutdown for now to match Darjeeling's functionality. Signed-off-by: Alex Jones <[email protected]>
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jwnrt
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Jan 22, 2025
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This PR introduces two commits that connect the alert handler to the
ot_earlgreyQEMU machine, to allow it to support the same alert handling functionality that is already present inot_darjeeling. See the commit messages for more details.This functionality cannot be appropriately tested by the existing alert handler tests, which require additional functionality either in the alert handler or other blocks. With the additional changes from #111 on top, which adds support for NMIs, I can see that
rv_core_ibex_nmi_irq_testis passing, which makes simple use of the alert handler with a pwrmgr fatal alert.