This page provides detailed information about the Imperas Instruction Set Simulator for the ARM MultiCluster processor core.
Processor IP owner is ARM Holdings. More information is available from them here.
The Imperas Instruction Set Simulator (ISS) is a product of Imperas Software Ltd. It is a binary licensed by Imperas as a commercial product. It is also available in OVP packages for evaluation and demonstration.
The Imperas ISS uses the OVP Fast Processor Models and dynamically loads them as selected.The OVP Fast Processor Models are written using the OVP VMI API that provides a Virtual Machine Interface that defines the behavior of the processor.The VMI API makes a clear line between model and simulator allowing very good optimization and world class high speed performance.
The processor models are provided as a binary shared object and are also available as source (different models have different licensing conditions). This allows the download and use of the model binary or the use of the source to explore and modify the model.
The models have been run through an extensive QA and regression testing process.
If you develop your own processor models using the OVP VMI APIs then they can be used with the Imperas ISS.
Traditionally, processor models and simulators make use of one thread on the host PC. Imperas have developed a technology, called QuantumLeap, that makes use of the many host cores found in modern PC/workstations to achieve industry leading simulation performance. To find out about the Imperas parallel simulation lookup Imperas QuantumLeap. There are videos of QuantumLeap on ARM here, and MIPS here. For press information related to QuantumLeap for ARM click here or for MIPS click here. Many of the OVP Fast Processor Models have been qualified to work with QuantumLeap - this is indicated for this model below.
This ISS executes instructions of the target architecture and provides an interface for debug access. An interface to GDB is provided and this allows the connection of many industry standard debuggers that use the GDB/RSP interface. For more information watch the OVP video here.
The ISS also works with the Imperas Multicore Debugger and advanced Verification, Analysis and Profiling tools.
The ISS is downloadable (needs registration and to be logged in) in package Demo_Processors for Windows32 and for Linux32. Note that the ISS is also available for 64 bit hosts as part of the commercial products from Imperas.
This ISS uses the CPU with Model Variant name: MultiCluster
This model implements an ARM system containing clusters of MPCore processors communicating using a common GICv2 or GICv3 block.
By default, the system contains Cortex-A53MPx4 and Cortex-A57MPx4 clusters, but this can be changed using parameter "override_clusterVariants". This parameter is a comma-separated list of cluster components (e.g. "Cortex-A53MPx4,Cortex-A57MPx4"). Note that if a GICv2 is selected, the total number of PEs must not exceed 8.
This document describes the interface to the MultiCluster only. Refer to documentation of individual clusters for information regarding implemented features, licensing and limitations.
By default, the model implements a GICv2. Parameter enableGICv3 can be used to select a GICv3 instead.
The CPU model being used is downloadable (needs registration and to be logged in) in package arm.model for Windows32 and for Linux32. Note that the CPU model is also available for 64 bit hosts as part of the commercial products from Imperas.
OVP simulator downloadable (needs registration and to be logged in) in package OVPsim for Windows32 and for Linux32. Note that the OVP simulator is also available for 64 bit hosts as part of the commercial products from Imperas.
OVP Download page here.
OVP documentation that provides overview information on processor models is available OVP_Guide_To_Using_Processor_Models.pdf.
Full model specific documentation on the variant (MultiCluster) being used in this ISS is available OVP_Model_Specific_Information_arm_MultiCluster.pdf.
For more information on the Imperas ISS see the Imperas site and on the OVP Fast Processor model see the OVPworld site.
Location: The Fast Processor Model source and object file is found in the installation VLNV tree: arm.ovpworld.org/processor/arm/1.0
Processor Endian-ness: This model can be set to either endian-ness (normally by a pin, or the ELF code).
Processor ELF Code: The ELF code for this model is: 0xb7
QuantumLeap Support: The processor model is qualified to run in a QuantumLeap enabled simulator.
Information on the MultiCluster OVP Fast Processor Model can also be found on other web sites::
www.ovpworld.org has the library pages http://www.ovpworld.org/library/wikka.php?wakka=CategoryProcessor
www.imperas.com has more information on the model library
http://www.ovpworld.org: Installation, Getting Started with OVP, and Cross-Compiling Applications
http://www.ovpworld.org: iGen Model Generator Introduction
http://www.ovpworld.org: riscvOVPsim. A complete RISC-V ISS for bare-metal software development and Specification Compliance Test Development
http://www.ovpworld.org: Altera Nios II Bare Metal & Cyclone III Linux Booting Demo Video
Currently available Instruction Set Simulator (ISS) Families.