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:
May. 04, 2004
Filed:
Jun. 09, 2000
Heidi R. Pickreign, Harvard, MA (US);
Laxminarayan Krishnamurthy, Acton, MA (US);
Robert Reissfelder, Westwood, MA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
The present application is directed to a method and system for mapping a host computer address space into a network interface adapter (NIA) address space. A network interface processor contained within the NIA requests a memory allocation from the host computer. The host computer responds with an assigned base address in the host computer address space and a length defining the contiguous addresses within the host computer address space equal to the allocation requested by the NIA processor. A hardware trap is set, such that, an interrupt to the NIA processor is generated when the host computer attempts to access data at an address within the allocated address range of host computer contiguous addresses. The network interface processor translates the received host address to a physical address within the NIA address space, reads the data at the respective NIA physical address and transfers the data to the host computer.