Permission translator

A method, comprising:

• with translator circuitry,
• receiving a bus access transaction from a source system element, the bus access transaction comprising a source permission identifier, wherein the source permission identifier encodes one of a plurality of source privilege levels associated with a first permission scheme;
• selecting a destination permission identifier based on a mapping between respective source permission identifiers and respective destination permission identifiers, wherein the destination permission identifier encodes one of a plurality of destination privilege levels associated with a second permission scheme,
• wherein the source privilege levels and the destination privilege levels differ from one another such that the first permission scheme is incompatible with the second permission scheme;
• and
• providing a modified bus access transaction that includes the selected destination permission identifier to a destination hardware device;
• and
• with the destination hardware device, processing the modified bus access transaction based on the second permission scheme without interpreting the source permission identifier.

Translator circuitry, comprising:

• a plurality of permission control registers, each permission control register associated with a different source permission identifier and configured to store a destination permission identifier, wherein each source permission identifier encodes one of a plurality of source privilege levels associated with a first permission scheme and each destination permission identifier encodes one of a plurality of destination privilege levels associated with a second permission scheme,
• wherein the source privilege levels and the destination privilege levels differ from one another such that the first permission scheme is incompatible with the second permission scheme;
• and
• a selector circuitry comprising
• a plurality of respective inputs coupled to respective permission control registers of the plurality of permission control registers;
• a selection input configured for coupling to a source hardware device, the selection input configured to receive a source permission identifier of a bus access transaction, wherein the selector is configured to select a destination permission identifier associated with the source permission identifier of the bus access transaction;
• and
• an output configured for coupling to a destination hardware device, the output configured to provide the selected destination permission identifier as part of a modified bus access transaction to the destination hardware device, such that the destination hardware device processes the modified bus access transaction without interpreting the source permission identifier.

A method, comprising:

• providing a mapping of respective destination permission identifiers and respective source permission identifiers, wherein each source permission identifier encodes one of a plurality of source privilege levels associated with a first permission scheme and each destination permission identifier encodes one of a plurality of destination privilege levels associated with a second permission scheme,
• wherein the source privilege levels and the destination privilege levels differ from one another such that the first permission scheme is incompatible with the second permission scheme;
• receiving a source permission identifier of a bus access transaction;
• and
• providing, to a destination hardware device, a modified bus access transaction that includes a destination permission identifier mapped to the source permission identifier, such that the destination hardware device processes the modified bus access transaction without interpreting the source permission identifier.