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ac6 >> ac6-training >> Processors >> ARM Cores >> Cortex-R4 implementation Download as PDF Write us

RR0 Cortex-R4 implementation

This course covers the Cortex-R4 ARM core

  • This course is split into 3 important parts:
    • Cortex-R4 architecture
    • Cortex-R4 software implementation and debug
    • Cortex-R4 hardware implementation.
  • Interaction between level 1 caches, TCM and main memory is studied through sequences.
  • The course explains how to assign access permissions and attributes to regions by using the MPU.
  • The exception mechanism is detailed, indicating how the VIC port can contribute to reduce interrupt latency.
  • The course also details the hardware implementation and provides some guidelines to design a SoC based on Cortex-R4.
  • An overview of the Coresight specification is provided prior to describing the debug related units.
Labs are run under RVDS
A more detailed course description is available on request at
  • Knowledge of ARM7/9.
  • This course does not include chapters on low level programming.
    • ACSYS offers a large set of tutorials to become familiar with RVDS, assembly level programming, compiler hints and tips.
  • More than 12 correct answers to Cortex-R prerequisites questionnaire.
  • Theoretical course
    • PDF course material (in English) supplemented by a printed version for face-to-face courses.
    • Online courses are dispensed using the Teams video-conferencing system.
    • The trainer answers trainees' questions during the training and provide technical and pedagogical assistance.
  • At the start of each session the trainer will interact with the trainees to ensure the course fits their expectations and correct if needed
  • Any embedded systems engineer or technician with the above prerequisites.
  • The prerequisites indicated above are assessed before the training by the technical supervision of the traineein his company, or by the trainee himself in the exceptional case of an individual trainee.
  • Trainee progress is assessed by quizzes offered at the end of various sections to verify that the trainees have assimilated the points presented
  • At the end of the training, each trainee receives a certificate attesting that they have successfully completed the course.
    • In the event of a problem, discovered during the course, due to a lack of prerequisites by the trainee a different or additional training is offered to them, generally to reinforce their prerequisites,in agreement with their company manager if applicable.

Course Outline

  • States and modes
  • Benefit of register banking
  • Exception mechanism
  • Instruction sets
  • Purpose of CP15
  • Block diagram
  • ARMv7-R architecture
  • Supported instruction sets
  • Exceptions
  • System control coprocessor
  • Configurable options
  • Prefetch unit
  • Instruction cycle timing
  • Dynamic branch prediction mechanism
  • Data Processing Unit
  • Dual issue conditions
  • Return stack
  • Instruction Memory Barrier
  • Device and normal memory ordering
  • Memory type access restrictions
  • Access order
  • Memory barriers, self-modifying code
  • ARM v7 PMSA
  • Cortex-R4 MPU and bus faults
  • Region overview, memory type and access control, sub-regions
  • Region overlapping
  • Setting up the MPU
  • Low Interrupt Latency
  • Primecell VICs
  • VIC basic signal timing
  • Interrupt priority and masking
  • Abort exception
  • Precise vs imprecise faults
  • Cache basics
  • Write with allocate policy
  • Debugging when caches are active
  • Accessing the cache RAM from AXI slave interface
  • Tightly Coupled Memories
  • ECC/parity protection
  • Store buffer, merging data
  • L1 caches software read for debug purposes
  • PL301 AXI interconnect
  • Separate address/control and data phases
  • AXI channels, channel handshake
  • Support for unaligned data transfers
  • Cortex-R4 external memory interface, ID encoding
  • Clock domains, CLKIN, FREECLKIN and PCLKDBG
  • Reset domains, power-on reset and debug reset
  • Power control, dynamic power management
  • Wait For Interrupt architecture
  • Debugging the processor while powered down
  • AXI master interface
  • Controlling an external cache
  • AXI transaction splitting
  • AXI slave interface
  • Using the AXI slave interface to perform built-in self tests
  • Understanding the error recovery mechanisms
  • Exclusive accesses
  • Local monitor
  • Pinout
  • Read timing diagram
  • Write timing diagram
  • APB3.0 new features
  • Event counting
  • Selecting the event to be counted for the 3 counters
  • Debugging a multi-core system with the assistance of the PMU
  • Voltage domains
  • Run mode, standby mode, dormant mode
  • Studying the sequence required to enter and exit dormant mode
  • Standby and wait for event signals
  • Invasive debug, non-invasive debug
  • APBv3 debug interface
  • Debug facilities offered by Cortex-R4
  • Process related breakpoint and watchpoint
  • Program counter sampling
  • Event catching
  • Debug Communication Channel
  • ETM interface, connection to funnel
  • Cross-Trigger Interface, debugging a multi-core SoC
  • Second-level address decoding
  • Read timing diagram
  • Write timing diagram
  • APB3.0 new features
  • Performance monitor, event counting
  • Coresight specification overview
  • CP14 and memory-mapped registers
  • Embedded core debug
  • Invasive debug
  • Debug exception
  • Debug Communication Channel
  • External debug interface
  • Understanding how the Debug unit, the Embedded Trace Macrocell and the Cross-Triggering Interface interact