Address and interrupt policies trade flexibility with software stability.
+------------------+----------------+----------------+----------------+
| Approach | Strength | Weakness | Best when |
+------------------+----------------+----------------+----------------+
| Strict | predictable | slower early | new program |
| Balanced | practical | needs rigor | stable teams |
| Aggressive | fast | escape risk | late schedule |
| Re-architect | durable | expensive | recurring failures |
+------------------+----------------+----------------+----------------+Pick the approach based on residual silicon risk, not only schedule pressure.
Policy-only arguments without artifact evidence
Unbounded waivers
INTEGRATION EVIDENCE MATRIX — Interrupt Topology Contracts
+-------------------+------------------------+--------------------------+-------------------------+
| Evidence | Tells you | Does not prove | Next action |
+-------------------+------------------------+--------------------------+-------------------------+
| Manifest diff | baseline changed | root cause itself | isolate first delta |
| Domain trace | where behavior diverged| ownership accountability | map to contract owner |
| Signoff dashboard | closure posture | reproducibility quality | verify source artifacts |
| Bring-up logs | software-visible symptom| physical/timing cause | correlate with HW trace |
| Waiver register | accepted residual risk | technical closure | review expiry criteria |
+-------------------+------------------------+--------------------------+-------------------------+Address, interrupt, and IO contracts are where hardware/software alignment is won or lost.
HW/SW CONTRACT
address map + interrupt model + io defaults -> firmware behaviorBOOT REGRESSION SOURCES
map churn █████
reset defaults ████
driver mismatch ███address decode audit
interrupt latency report
IO bring-up checklist
boot contract review
A map alias issue caused sporadic peripheral misconfiguration despite clean block-level tests.
Freeze address map baseline
Audit reset defaults
Validate firmware assumptions
Ask: what baseline, owner, and artifact prove this topic is truly closed?
State baseline manifest and owner with every closure metric.
Run cross-domain regression after every top-level fix.
Comparing results across different manifests.
Unowned issues slipping through review cycles.
Waiving risks without expiry and validation plan.
Interrupt architecture defines aggregation, priority, routing, and affinity policies that software relies on for deterministic response.
Metric: interrupt latency tail, missed-interrupt incidents
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