The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2007
Filed:
Jul. 15, 2004
Michael Norman Day, Round Rock, TX (US);
Charles Ray Johns, Austin, TX (US);
Peichun Peter Liu, Austin, TX (US);
Thuong Truong, Austin, TX (US);
Takeshi Yamazaki, Austin, TX (US);
Michael Norman Day, Round Rock, TX (US);
Charles Ray Johns, Austin, TX (US);
Peichun Peter Liu, Austin, TX (US);
Thuong Truong, Austin, TX (US);
Takeshi Yamazaki, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, an apparatus, and a computer program are provided for controlling memory access. Direct Memory Access (DMA) units have become commonplace in a number of bus architectures. However, managing limited system resources has become a challenge with multiple DMA units. In order to mange the multitude of commands generated and preserve dependencies, embedded flags in commands or a barrier command are used. These operations then can control the order in which commands are executed so as to preserve dependencies.