Messages

Warnings

The SystemRDL compiler provides several optional warnings. These lint-like checks report constructs that are not inherently wrong, but may be considered risky.

All warning messages are disabled by default.

Individual warning messages can be enabled by passing one or more of the following flags into the warning_flags option of the RDLCompiler constructor. Multiple flags can be combined using bitwise OR (the | operator).

systemrdl.warnings.ALL

Enable all warnings.

systemrdl.warnings.MISSING_RESET

Check if a field that implements storage, or is a runtime constant, is missing it’s reset value.

systemrdl.warnings.IMPLICIT_FIELD_POS

Check if a field’s bit offset is not explicitly specified.

Some organizations may want to enforce explicit assignment of bit offsets to avoid unexpected field packing.

systemrdl.warnings.IMPLICIT_ADDR

Check if a component’s address offset is not explicitly assigned.

Some organizations may want to enforce explicit assignment of addresses to avoid unintended address map changes.

systemrdl.warnings.STRIDE_NOT_POW2

Check if an instance array’s address stride is not a power of two.

systemrdl.warnings.STRICT_SELF_ALIGN

Enforce that all addressable components are aligned based on their size. Alignment is determined by the component’s size rounded up to the next power of two.

Strict self-alignment may be desireable since it can simplify address decode logic for hierarchical designs.

This rule is a superset of STRIDE_NOT_POW2.

Exceptions

class systemrdl.RDLCompileError

Base class for all SystemRDL compiler exceptions

Message Handling

class systemrdl.messages.MessagePrinter

Printer class that handles formatting and emitting compiler messages

This class can be extended in order to provide custom compiler message formatting or logging

emit_message(lines: List[str]) None

Emit message. Default printer emits messages to stderr

Parameters:

lines (list) – List of strings containing each line of the message

format_message(severity: Severity, text: str, src_ref: Optional[SourceRefBase]) List[str]

Formats the message prior to emitting it.

Parameters:
  • severity (Severity) – Message severity.

  • text (str) – Body of message

  • src_ref (SourceRefBase) – Reference to source context object

Returns:

List of strings for each line of the message

Return type:

list

get_selection_context(src_ref: DetailedFileSourceRef, color_code: str) List[str]

Generates the message context lines

class systemrdl.messages.MessageHandler
error(text: str, src_ref: Optional[SourceRefBase] = None) None

Print an error message. Sets had_error to True.

Parameters:
  • text (str) – Message text

  • src_ref (SourceRefBase) – Optional source reference object to provide message context

fatal(text: str, src_ref: Optional[SourceRefBase] = None) NoReturn

Print a fatal message.

Parameters:
  • text (str) – Message text

  • src_ref (SourceRefBase) – Optional source reference object to provide message context

Raises:

RDLCompileError – Always raises this exception

had_error

Set to True if an error message was ever emitted

warning(text: str, src_ref: Optional[SourceRefBase] = None) None

Print a warning message.

Parameters:
  • text (str) – Message text

  • src_ref (SourceRefBase) – Optional source reference object to provide message context