steffenreith/hsm

Open-source, RISC-V-based Hardware Security Module

OpenROAD-flow-scripts design configuration for a fully open-source hardware security module ASIC with IHP's open PDK.

The Design

RISC-V core based on VexRiscv, extended with masked AES as well as a big number multiplication unit. Eight 32KiB SRAM cells to hold firmware, stack, heap etc. Refer to the hardware/software repository for details.

The ASIC

To build the ASIC, set up OpenROAD-flow-scripts, clone this repository as <ORFS-Root>/flow/designs/ihp-sg13g2/hsm and run the build like any other ORFS design. A few local modifications to the ORFS installation are required and/or recommended until upstream fixes are available:

1. Apply patches/final_report.tcl.patch (to <ORFS-Root>/flow/scripts/final_report.tcl) as a workaround for The-OpenROAD-Project/OpenROAD-flow-scripts#1667
2. Apply patches/sg13g2_tech.lef.patch (to <ORFS-Root>/flow/platforms/ihp-sg13g2/lef/sg13g2_tech.lef) as a workaround for The-OpenROAD-Project/OpenROAD-flow-scripts#1681
3. Apply patches/sg13g2_stdcell.lef.patch (to <ORFS-Root>/flow/platforms/ihp-sg13g2/lef/sg13g2_stdcell.lef) as a workaround until https://github.com/IHP-GmbH/IHP-Open-PDK/commit/30e71efdab1399e49b4d7b6b63e85a1bca2bd46c makes it into ORFS
4. Apply The-OpenROAD-Project/OpenROAD-flow-scripts#1708 locally

To apply Git patches, use git apply <file>.patch.

Caveats

• The resulting design will contain design rule violations as tracked in The-OpenROAD-Project/OpenROAD-flow-scripts#1677.
• The resulting design will not have metal density fill applied. We are currently working on that.

Other than that, the design is ready for tapeout.

Taped-out Build

Find the build taped out on 11/12/2023 in the releases.