Freescale Semiconductor,inc.

Moshe Bachar

Moshe Anschel

Itay S Peled

Jacob Efrat

Uri Dayan

Yakov Tokar

Alon Eldar

Zvika Rozenshein

Itay Peled

A virtual address cache and a method for sharing data. The virtual address cache includes: a memory, adapted to store virtual addresses, task identifiers and data associated with the virtual addresses and the task identifiers; and a comparator, connected to the memory, adapted to determine that data associated with a received virtual address and a received task identifier is stored in the memory if at least a portion of the received virtual address equals at least a corresponding portion of a certain stored virtual address and a stored task identifier associated with the certain stored virtual address indicates that the data is shared between multiple tasks. The method includes: receiving a virtual address and a task identifier for addressing data; determining as to whether the data is stored in a memory based upon a comparison of at least a portion of the received virtual address with at least a portion of an address associated with data stored in memory and based upon a fulfillment of the following criterion: a stored task identifier associated with the certain stored virtual address indicates that the data is shared between multiple tasks.

Virtual address cache and method for sharing data using a unique task identifier

A memory management unit that includes: (i) multiple data segment descriptors, each data segment descriptor associated with a data memory segment; (ii) multiple program segment descriptors, each program segment descriptor associated with a program memory segment; and (iii) a controller, adapted to replace the content of the multiple data segment descriptors and the multiple program segment descriptors in response to a task switch. A method for memory management, the method includes: (i) providing multiple data segment descriptors; each data segment descriptor associated with a data memory segment, and providing multiple program segment descriptors, each program segment descriptor associated with a program memory segment; (ii) receiving and storing a program task identifier and a data task identifier; (iii) receiving a data access request and determining how to handle the data access request in response to a content of the multiple data segment descriptors; and (iv) receiving a program access request and determining how to handle the program access request in response to a content of the multiple program segment descriptors.

Descriptor-based memory management unit and method for memory management

Growing community of inventors

Tel Aviv, Israel

Moshe Bachar