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  1. VCD Hierarchy Manipulator

    1) About this program.
    This small utility manipulates hierarchy information of VCD. This is useful for VCDs generated by the ASI(OSCI) SystemC PoC simulator, in which all signals are recorded in the same hierarchy named 'SystemC'.
    This program modifies a header of VCD so that the all signals are located in its hierarchy. It can be realized with simple script written in lightweight languages like Ruby or Perl, but slower for bigger VCDs. Such scripts have to read and write whole VCD file. This is why such scripts are slow.
    This program modifies header of VCD in-place. Only 1KB-100KB is read and written even with VCD > 1GB.
    Please also see http://forums.accellera.org/topic/1481-scopes-in-systemc-vcd-files/
    2) How to build
    All you need to do is just type make.
    % make
    You will find vcd_hier_manip which is executable.
    I tested on Linux.
    3) How to use
    % ./vcd_hier_manip dump.vcd
    This program modifies dump.vcd. Please backup the original VCD if the file is important.
    In rare case, this program cannot modify a header in-place if the modifed header is bigger than the original header size. In that case, use --output option to specify the output file. This option makes this tool much slower because it reads and writes whole VCD.
    % ./vcd_hier_manip input.vcd --output output.vcd
    Option --flatten provides reverse modification.
    4) License
    This program is written by Yutestu TAKATSUKASA. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    This program is released under GPL2 in general.
    If you download this program from Accellera Uploads area, the license is Apache license.
    5) Bugs
    This program does not support the complete specification of VCD. I tested only with SystemC 2.2 and 2.3. If you find any problem, please feel free to send comments or patches. It will be helpful if you send me a header of VCD to fix bugs. (Only header part is sufficient)
    If you kindly give some feedback, please post to https://github.com/yTakatsukasa/vcd_hierarchy_manipulator/issues.
    The latest version is always available at https://github.com/yTakatsukasa/vcd_hierarchy_manipulator

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  2. Proposed Interfaces for Interrupt Modeling, Register Introspection and Modeling of Memory Maps from STMicroelectronics, ARM, and Cadence

    STMicroelectronics, ARM and Cadence Improve Tool and Model Interoperability with Three Joint Contributions to Accellera Systems Initiative
    Proposed Interfaces for Interrupt Modeling, Register Introspection and Modeling of Memory Maps Enable Third-Party Model and Tools Markets
    Geneva, Switzerland, Cambridge, UK, San Jose, California, July 29, 2013 -- STMicroelectronics, ARM and Cadence Design Systems, Inc. today announced three new contributions to the SystemC Language Working Group of the Accellera Systems Initiative. This collaboration will further increase model and tool interoperability for electronic system-level (ESL) design at the transaction-level.
    The joint work includes new interfaces for interrupt modeling, which allow seamless integration of models from different companies; application programming interfaces for register introspection that enable tool interoperability to seamlessly display and update register values; and new approaches for memory-map modeling that improve users’ productivity during debugging of virtual platforms for hardware/software multicore systems. The contributions consist of fully working application programming interfaces (API) and implementations, as well as documentation and examples, released under an Apache 2.0 open-source license and available online at http://forums.accellera.org/files/.
    “These new interfaces are crucial to strengthening the ESL ecosystem. As a step towards interoperability driven by ST, ARM and Cadence, these proposed standards dramatically reduce risks and efforts associated with the integration of virtual prototypes. Eliminating the need for adapters will increase virtual prototype simulation performances, enable sooner and faster hardware-software integration, and therefore improve product time-to-market,” said Philippe Magarshack, executive vice president, Design Enablement & Services, STMicroelectronics.
    “Cadence has worked closely with ST, ARM and other partners to develop these open standards proposals,” said Stan Krolikoski, distinguished engineer, Cadence. “Adoption of these proposed standard interfaces in virtual prototyping solutions will enable the expansion of the ESL ecosystem and provide added value through interoperability to users.”
    “The Accellera TLM 2 standard has been very important in enabling an ecosystem of models that can be integrated into SystemC virtual prototypes,” said John Goodenough, vice president of Design Technology and Automation, ARM. “By addressing a key gap in the model-to-model interface and by enhancing tool integration, these proposed contributions further help in ensuring virtual prototypes can be predictably and consistently integrated.”
    "With the growing adoption of virtual prototypes for early software development, it is important to continue to simplify their creation while adding value for users,” said Yatin Trivedi, director, standards and interoperability at Synopsys. “As a market leader in virtual prototyping, we welcome contributions and discussions that help to advance the Accellera SystemC TLM standard."
    “We look forward to working together and collaborating in the Accellera Systems Initiative SystemC Language Working Group to advance the needs for improved virtual prototyping model and tool interoperability,” said Shabtay Matalon, ESL market development manager from Mentor Graphics Corporation. “The initial open source contributions serve as a good catalyst to start the process of addressing and refining these pressing standards challenges.”
    The first technical proposal addresses the need for better interoperability among SystemC TLM (Transaction Level Modeling) models and proposes a standard interface to model interrupts and wires at the Transaction Level. This will enable seamless integration of models from different companies with standardized memory-mapped connections, further enhancing the growth of a market for third-party TLM models.
    The second proposal defines a standard interface between models and tools to support register introspection, enabling tools to seamlessly display and update register values. This interface works in a mix of different user-defined register classes to support platforms integrating heterogeneous models from various model providers. This capability is a key enabler for integration and debug of embedded software on pre-silicon virtual prototypes.
    The third proposal introduces an approach to reconstruct system memory maps as seen from initiators, enabling ESL tools to support hardware/software debug on complex virtual platforms, for which understanding of the memory maps is instrumental. It addresses the challenge that memory maps depend on the interconnection of models and as a result each system initiator might have its own view.
    With these new contributions, ST, ARM and Cadence expect the integration of SystemC models in virtual prototypes will be significantly improved for all users, enabling the models’ quick and efficient deployment. In addition, standard interfaces between models and tools will extend hardware/software integration and debug capabilities using appropriate tools.
    Within the Accellera Systems Initiative, ARM, Cadence, and ST plan to work with other companies to refine and fully standardize these proposals.

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