Data processing system
AssigneeInfineon Technologies AG
InventorsGerard David Jennings, Wieland Fischer
Life of this patent
Estimating the term…
Abstract
A data processing system comprising a computer chip having a processing circuit and a chip-internal first memory and a chip-external second memory being coupled to the computer chip, wherein the processing circuit is configured to allow execution of computer programs stored in the first memory and to prevent execution of computer programs stored in the second memory when the data processing system is in a first state, and to allow execution of computer programs stored in the second memory when the data processing system is in a second state.
Claims25
A data processing system comprising:
- a computer chip having a processing circuit and a chip-internal first memory;
- and
- a chip-external second memory being coupled to the computer chip;
- wherein the processing circuit is configured to allow execution of computer programs stored in the first memory and to prevent execution of computer programs stored in the second memory when the data processing system is in a first state and to allow execution of computer programs stored in the second memory when the data processing system is in a second state.
A data processing system comprising:
- a computer chip having a processing circuit and a chip-internal first memory;
- a chip-external second memory being coupled to the computer chip;
- and
- an access control circuit configured to grant or deny access to resources of the data processing system depending on whether the access is requested by a computer program the code of which is stored in the first memory or by a computer program the code of which is stored in the second memory.
A method for operating a data processing system comprising a computer chip having a processing circuit and a chip-internal first memory, and comprising a chip-external second memory being coupled to the computer chip, the method comprising:
- allowing execution of computer programs stored in the first memory and preventing execution of computer programs stored in the second memory when the data processing system is in a first state;
- and
- allowing execution of computer programs stored in the second memory when the data processing system is in a second state.
A method for operating a data processing system comprising a computer chip having a processing circuit and a chip-internal first memory and a chip-external second memory being coupled to the computer chip, the method comprising:
- granting or denying access to resources of the data processing system depending on whether the access is requested by a computer program the code of which is stored in the first memory or by a computer program the code of which is stored in the second memory.
A computer program product, which, when executed by a data processing system comprising a computer chip having a processing circuit and a chip-internal first memory and a chip-external second memory being coupled to the computer chip makes the data processing system perform:
- allowing execution of computer programs stored in the first memory and
- preventing execution of computer programs stored in the second memory when
- the data processing system is in a first state;
- and
- allowing execution of computer programs stored in the second memory when the data processing system is in a second state.
Dependencies are inferred from the claim text.