By Harry D. Foster, Adam C. Krolnik, David J. Lacey
Chapter three Specifying RTL homes sixty one three. 1 Definitions and ideas sixty two sixty two three. 1. 1 estate three. 1. 2 occasions sixty five three. 2 estate type sixty five defense as opposed to liveness sixty six three. 2. 1 three. 2. 2 Constraint as opposed to statement sixty seven three. 2. three Declarative as opposed to procedural sixty seven three. three RTL statement specification strategies sixty eight RTL invariant assertions sixty nine three. three. 1 three. three. 2 mentioning houses with PSL seventy two RTL cycle comparable assertions seventy three three. three. three three. three. four PSL and default clock statement seventy four three. three. five Specifying sequences seventy five three. three. 6 Specifying scenarios eighty three. three. 7 PSL integrated services eighty two three. 4Pragma-based assertions eighty two three. five SystemVerilog assertions eighty four three. five. 1 speedy assertions eighty four three. five. 2Concurrent assertions 86 three. five. three procedure features ninety five three. 6 PCI estate specification instance ninety six three. 6. 1 PCI evaluate ninety six three. 7 precis 102 bankruptcy four PLI-Based Assertions 103 four. 1 Procedural assertions 104 four. 1. 1 an easy PLI statement one hundred and five four. 1. 2 Assertions inside a simulation time slot 108 four. 1. three Assertions throughout simulation time slots 111 four. 1. four fake firing throughout a number of time slots 116 four. 2 PLI-based statement library 118 four. 2. 1 Assert quiescent kingdom 119 four. three precis 123 bankruptcy five practical assurance one hundred twenty five five. 1 Verification ways 126 five. 2 realizing insurance 127 five. 2. 1 Controllability as opposed to observability 128 five. 2.
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Extra info for Assertion-Based Design
I - RTL implementation only. This domain of intent was not defined by the specification or the architect/design phases. This happens frequently since there are many lower-level implementation details that neither the specification nor the design need to describe. SD - Specification and architect/design. This domain was defined by the specification and architect/design phases, but details were either missed during RTL implementation or deemed unnecessary (hence, the requirements were changed but not updated).
For instance, defining a set of RTL naming conventions, coding styles and rules, and coding restrictions allows designers to produce consistent code that is easily readable by all members of the team. A major reason for coding rules and restrictions is to help steer designers away from RTL code that is not sythesizable or prone to errors. Examples of general RTL coding conventions include the Reuse Methodology Manual [Keating and Bricaud 2002] and Principles of Verifiable RTL Design [Bening and Foster 2001].
With the increasing size and complexity of today’s designs, reuse of IP within these designs has become more important. It is essential that conventions be defined and followed in order to improve the reusability of IP across multiple designs. Finally, functional coverage models (see Chapter 5, “Functional Coverage”), as well as general coverage processes and coverage goals, must be defined at the beginning of the project. While coverage tools are effective in many ways, there are steps that designers can take that allow the specific coverage tools to recognize design elements (such as state machines) in an easier manner.
Assertion-Based Design by Harry D. Foster, Adam C. Krolnik, David J. Lacey