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This page provides detailed information about the OVP Fast Processor Model of the ARM Cortex-A53MPx3 core.
Processor IP owner is ARM Holdings. More information is available from them here.
OVP Fast Processor Model is written in C.
Provides a C API for use in C based platforms.
Provides a native C++ interface for use in SystemC TLM2 platforms.
The model is 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 model is provided as a binary shared object and is 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 model has been run through an extensive QA and regression testing process.
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 model 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 model also works with the Imperas Multicore Debugger and advanced Verification, Analysis and Profiling tools.
An ISS is a software development tool that takes in instructions for a target processor and executes them. The heart of an ISS is the model of the processor. Imperas has developed a range of ISS products for use in embedded software development that utilize this fast Fast Processor Model. The Imperas ARM Cortex-A53MPx3 ISS runs on Windows/Linux x86 systems and takes a cross compiled elf file of your program and allows very fast execution. The ARM Cortex-A53MPx3 ISS also provides access to standard GDB/RSP debuggers and connects to the Eclipse IDE and Imperas debuggers.
Model Variant name: Cortex-A53MPx3
ARM Processor Model
Usage of binary model under license governing simulator usage.
Note that for models of ARM CPUs the license includes the following terms:
Licensee is granted a non-exclusive, worldwide, non-transferable, revocable licence to:
If no source is being provided to the Licensee: use and copy only (no modifications rights are granted) the model for the sole purpose of designing, developing, analyzing, debugging, testing, verifying, validating and optimizing software which: (a) (i) is for ARM based systems; and (ii) does not incorporate the ARM Models or any part thereof; and (b) such ARM Models may not be used to emulate an ARM based system to run application software in a production or live environment.
If source code is being provided to the Licensee: use, copy and modify the model for the sole purpose of designing, developing, analyzing, debugging, testing, verifying, validating and optimizing software which: (a) (i) is for ARM based systems; and (ii) does not incorporate the ARM Models or any part thereof; and (b) such ARM Models may not be used to emulate an ARM based system to run application software in a production or live environment.
In the case of any Licensee who is either or both an academic or educational institution the purposes shall be limited to internal use.
Except to the extent that such activity is permitted by applicable law, Licensee shall not reverse engineer, decompile, or disassemble this model. If this model was provided to Licensee in Europe, Licensee shall not reverse engineer, decompile or disassemble the Model for the purposes of error correction.
The License agreement does not entitle Licensee to manufacture in silicon any product based on this model.
The License agreement does not entitle Licensee to use this model for evaluating the validity of any ARM patent.
Source of model available under separate Imperas Software License Agreement.
ARMv8 architecture models additionally require a run time model license - contact Imperas for more information.
Instruction pipelines are not modeled in any way. All instructions are assumed to complete immediately. This means that instruction barrier instructions (e.g. ISB, CP15ISB) are treated as NOPs, with the exception of any undefined instruction behavior, which is modeled. The model does not implement speculative fetch behavior. The branch cache is not modeled.
Caches and write buffers are not modeled in any way. All loads, fetches and stores complete immediately and in order, and are fully synchronous (as if the memory was of Strongly Ordered or Device-nGnRnE type). Data barrier instructions (e.g. DSB, CP15DSB) are treated as NOPs, with the exception of any undefined instruction behavior, which is modeled. Cache manipulation instructions are implemented as NOPs, with the exception of any undefined instruction behavior, which is modeled.
Real-world timing effects are not modeled: all instructions are assumed to complete in a single cycle.
Performance Monitors are implemented as a register interface only.
TLBs are architecturally-accurate but not device accurate. This means that all TLB maintenance and address translation operations are fully implemented but the cache is larger than in the real device.
Debug registers are implemented but non-functional (which is sufficient to allow operating systems such as Linux to boot). Debug state is not implemented.
This ARMv8 model also has the following specific limitations:
The optional CRC32 instructions are not supported.
The optional SIMD Cryptographic Extension instructions are not supported.
Models have been extensively tested by Imperas. ARM Cortex-A models have been successfully used by customers to simulate SMP Linux, Ubuntu Desktop, VxWorks and ThreadX on Xilinx Zynq virtual platforms.
AArch64 is implemented at EL3, EL2, EL1 and EL0.
AArch32 is implemented at EL3, EL2, EL1 and EL0.
SIMD, VFP and LPA (large physical address extension) are implemented as standard in ARMv8.
Security extensions are implemented (also known as TrustZone). To make non-secure accesses visible externally, override ID_AA64MMFR0_EL1.PARange to specify the required physical bus size (32, 36, 40, 42, 44 or 48 bits) and connect the processor to a bus one bit wider (33, 37, 41, 43, 45 or 49 bits, respectively). The extra most-significant bit is the NS bit, indicating a non-secure access. If non-secure accesses are not required to be made visible externally, connect the processor to a bus of exactly the size implied by ID_AA64MMFR0_EL1.PARange.
VMSA EL1, EL2 and EL3 stage 1 address translation is implemented. VMSA stage 2 address translation is implemented.
Generic Timer is present. Use parameter override_timerScaleFactor to specify the counter rate as a fraction of the processor MIPS rate (e.g. 10 implies Generic Timer counters increment once every 10 processor instructions).
GIC block is implemented (GICv2, including security extensions). Accesses to GIC registers can be viewed externally by connecting to the 32-bit GICRegisters bus port. Secure register accesses are at offset 0x0 on this bus; for example, a secure access to GIC register GICD_CTLR can be observed by monitoring address 0x00001000. Non-secure accesses are at offset 0x80000000 on this bus; for example, a non-secure access to GIC register GICD_CTLR can be observed by monitoring address 0x80001000
The internal GIC block can be disabled by raising signal GICCDISABLE, in which case the GIC needs to be modeled using a platform component instead. Input signals vfiq_CPU
Model downloadable (needs registration and to be logged in) in package arm.model for Windows32 and for Linux32
OVP simulator downloadable (needs registration and to be logged in) in package OVPsim for Windows32 and for Linux32
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 Cortex-A53MPx3 is available OVP_Model_Specific_Information_arm_Cortex-A53MPx3.pdf.
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.
The Cortex-A53MPx3 OVP Fast Processor Model also has parameters, model commands, and many registers.
The model may also have hierarchy or be multicore and have other attributes and capabilities.
To see this information, please have a look at the model variant specific documents.
Click here to see the detailed document OVP_Model_Specific_Information_arm_Cortex-A53MPx3.pdf.
Information on the Cortex-A53MPx3 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.fast-cpu-models.com has the page www.fast-cpu-models.com/arm_models/cortex-a53mpx3
www.systemc-cpu-models.org has the page www.systemc-cpu-models.org/arm_models/cortex-a53mpx3
www.systemc-tlm-cpu-models.org has the page www.systemc-tlm-cpu-models.org/arm_models/cortex-a53mpx3
www.simulation-model.com has the page www.simulation-model.com/arm_models/cortex-a53mpx3
www.embedded-processor-models.org has the page www.embedded-processor-models.org/arm_models/cortex-a53mpx3
www.imperas.com has more information on the model library
http://www.ovpworld.org: VMI Operating System support (VMI OS) API Reference Guide
http://www.ovpworld.org: VMI Programmers Views (VMI VIEW) API Reference Guide.
Currently available Fast Processor Model Families.