Integrate the Tiny RCU, normalized REF24 control, external-input profiles,
single PLL backend, SYS/MEM/PCLK clocks, CPU-only WFI gating, peripheral
lifecycle control and retained debug behavior. Keep CPU and all 32 main
SRAM macros on SYS and the six private Crypto macros on PCLK.
Add the handwritten RCU register/HAL contract, RS_EBUSY, bounded SDK
operations and focused firmware. Preserve shared-IP defaults and the
ICS55/PLL SAFE24 boot and explicit IHP130/no-PLL compatibility profiles.
Use APB/AXI domain bridges and source-owned response holders to preserve
backpressured responses, complete aborted bursts and prevent stale replay.
Verify production DMA source-reset drain and common XPI endpoint reset
with extracted integration bindings and an independent scoreboard.
Add source-bound macro/clock audits, SAFE24 observational STA constraints
and commercial-adapter host checks. No P8 functionality or operating-point
qualification is included. See TINY-R2-P7 in docs/ip/tiny-soc.md.
Validation: 54 P7 directed tests pass, including both simulators, ten
source-reset ratio runs and two expected-negative drain mutations.
RTL format/style, clock/reset inventory, Ruff and both Tiny PDK PR dry-runs
pass. Retained 06-00 synthesis and strict netlist boots pass for both PDKs;
STA remains negative and observational. Source comparison confirms only
the follow-up tests changed after that backend campaign.
Evidence: build/ics55-tiny-2026-10-14-06-00-ff4b5cef6eb5/meta/
tiny-r2-p7-source-reset/summary.json. Earlier firmware, HAL and compatibility
results and the non-clean full-suite attempt retain their original
attribution. Full Icarus firmware is deferred to final Tiny qualification;
this commit does not constitute human phase acceptance or physical signoff.
Integrate RNG, CRC, WS2812, Crypto, I2S master and the SDIO private AXI owner on SAFE24. Preserve the 128 KiB main SRAM and six private Crypto macros, add product-specific DMA assignments and reject unsupported SDK operations.
Correct APB read strobes, I2S receive assembly and SDIO command timing, backpressure and descriptor retirement. Add pin-level workloads, source-bound evidence checks and publication/commercial consumer compatibility.
Validation of the final P6 worktree: 1726 pytest tests passed with one optional pypdf skip (exit 0, 4021.61 seconds; terminal session 36439). Both PDKs passed both RTL simulators, netlist boot and 38-macro binding checks. Shared formal, Mini compatibility and software/source quality gates passed.
Evidence remains attributed to the retained dirty-worktree snapshots based on b3b30a72cd under build/ics55-tiny-2026-10-12-11-50-2eb98c0e1fae/meta/tiny-r2-p6/. Timing is negative and warning observations are not promoted. This commit does not accept P6, qualify physical operation or enable P7.
- Introduced for formal verification of fault handling in the Tiny R2 P5 architecture.
- Added to test target reset isolation and ensure proper handling of reset signals across multiple targets.
- Created to validate system-level interactions, including CPU and DMA progress during resets.
- Enhanced to include fault counting and master tracking for concurrent fault events.
- Developed to automate testing of concurrency, fault accounting, and retained-image acceptance.
- Updated Python test suite to validate new configurations and ensure proper integration with Tiny R2 P5 architecture.
- Updated SRAM instance paths in to reflect new hierarchy.
- Enhanced to include additional source files and updated parameterized tests for SRAM configurations.
- Modified to align with new SRAM structure and added a test for stale macro hierarchy.
- Introduced to validate dual-port local-memory protocol and CPU debug/reset functionality, including comprehensive simulation checks.
- Updated to include support for the ICS55 PDK, allowing for conditional source inputs and configuration checks.
- Added new test cases for the ICS55 platform, including PLL backend and GPIO readback functionality.
- Modified existing tests to accommodate changes in configuration and source input handling.
- Introduced new parameters in the testbench for better configurability.
- Ensured compatibility checks for the IHP130 and ICS55 PDKs in the feasibility script.
- Enhanced the publication tests to validate hardware changes more robustly.
- Implemented a new TCL script for Tiny R2 feasibility checks, reporting clock properties, path delays, and reset loads.
- Created a SystemVerilog module for the Tiny R2 reset tree, managing multiple reset signals for the system and its leaves.
- Developed a Python script for capturing and analyzing feasibility metrics, ensuring compliance with reset-load and clock frequency requirements.
- Added testbenches for the Tiny R2 reset tree and FIFO, validating reset behavior and timing contracts.
- Introduced unit tests for feasibility analysis, ensuring correct handling of clock rates and reset load conditions.
- Updated paths in test files to reflect new directory structure for RTL and script files.
- Changed references from rtl/mini to rtl/ip and scripts/rtl where applicable.
- Added a new test file for Tiny product isolation, ensuring independent ABI and bus acceptance.
- Enhanced tests for memory map generation and protocol contracts for Tiny architecture.
- Ensured that all tests are aligned with the latest directory structure and naming conventions.
maksyuki