Add MRAMMemory non-volatile peripheral with fault injection#185
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Add MRAMMemory non-volatile peripheral with fault injection#185neilberkman wants to merge 2 commits intorenode:masterfrom
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…ction Non-volatile memory model with configurable word-write semantics and deterministic fault injection for OTA update resilience testing. Features: - Configurable word size (default 8 bytes) for write granularity - Read-modify-write semantics preserving unaddressed bytes within words - Deterministic power-loss fault injection at configurable write count - Partial-program simulation with configurable tear behavior (RetainOldDataOnFault: MRAM retains old data, flash erases) - Bit-level corruption mode modeling partial cell state transitions - Write trace recording for offline analysis and trace replay - Sticky fault tracking for multi-write sequences Signed-off-by: Neil Berkman <neil@xuku.com>
Add one-shot transient read-fault injection to MRAMMemory. The read fault corrupts the value returned to the CPU without modifying NVM contents, modeling bit flips in the MRAM sense-amplifier path. Features: - ReadFaultAddress: peripheral-relative address to target - ReadFaultSkipCount: skip N qualifying reads before firing - ReadFaultBitFlips: configurable bit flip count (default 1-3) - ReadFaultSeed: deterministic PRNG seed for reproducibility - One-shot: auto-disarms after first fire Also fix Reset() to use `new` instead of `override` since ArrayMemory.Reset() is not virtual, and re-implement IBytePeripheral/IWordPeripheral/IDoubleWordPeripheral so bus-dispatched reads route through the fault-injection interception layer.
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Related issue
renode/renode#875
Description
New feature:
MRAMMemorynon-volatile memory peripheral extendingArrayMemoryinAntmicro.Renode.Peripherals.Memory.Reset()preserves storage contentsWordSize(default 8 bytes) with erase-then-program cycle at word boundariesInjectPartialWrite()simulates power-cut mid-write,InjectFault()for arbitrary corruption,FaultAtWordWritefor automatic injection at Nth write indexEnforceWordWriteSemanticstoggle,EraseFillbyteUsage example
Robot tests are in companion PR renode/renode#876.
Additional information
The Tardigrade project uses this peripheral for OTA fault-injection campaigns.