Electrical computers and digital processing systems: memory – Address formation – Address mapping
Reexamination Certificate
2006-02-07
2010-06-15
Thai, Tuan V (Department: 2185)
Electrical computers and digital processing systems: memory
Address formation
Address mapping
Reexamination Certificate
active
07739474
ABSTRACT:
A system and method for unifying access to a physical memory by operations using virtual addresses of the same virtual address space are provided. The operations may be generated by at least one central processing unit (CPU operations) and/or by at least one IO device (IO operations). The system may include a bus arranged to transfer data and virtual addresses of the same virtual address space from the central processing unit (CPU) and the IO device to a unified memory management unit (UMMU), a unified memory management unit (UMMU) arranged to translate the virtual addresses to physical addresses, and to protect the physical memory from illegal access attempts of the CPU operations and the IO operations. The system may further include a memory controller arranged to manage access to the physical memory. The access is done by using physical addresses.
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Engbersen Antonius Paulus
Satran Julian
Shmueli Edi
Smith, III Thomas Basil
Doan Duc T
International Business Machines - Corporation
Thai Tuan V
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