RISC-V IOMMU golden reference model

This code implements the RISC-V IOMMU specification - https://github.com/riscv-non-isa/riscv-iommu - and is intended to be a golden reference model for the specification.

Files organization

• libiommu - C files implementing the specification
• include - H files
• libtables - a support library to build page and directory tables
• test - a sample test application illustrating how to invoke and use libiommu and libtables