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:
Apr. 26, 2011
Filed:
Mar. 29, 2007
Masana Murase, Kawasaki, JP;
Wilfred E. Plouffe, Jr., San Jose, CA (US);
Masaharu Sakamoto, Yokohama, JP;
Kanna Shimizu, Austin, TX (US);
Vladimir Zbarsky, Newark, CA (US);
Masana Murase, Kawasaki, JP;
Wilfred E. Plouffe, Jr., San Jose, CA (US);
Masaharu Sakamoto, Yokohama, JP;
Kanna Shimizu, Austin, TX (US);
Vladimir Zbarsky, Newark, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of invoking power processor element (PPE) serviced C library functions on a synergistic processing element (SPE) running in isolated mode. When the SPE initiates a PPE-serviced function, an SPE stub routine allocates a parameter buffer in an open area of a local store (LS) memory within the SPE. The LS memory includes an open area accessible to the PPE, and an isolated area inaccessible to the PPE. The SPE stub routine copies function parameters corresponding to the PPE-serviced function to a buffer within the open area of the LS memory, and writes a message word, which contains an identification variable of the PPE-serviced function and a location variable of the function parameters, to the open area. When execution is temporarily suspended on the SPE, the PPE reads the message word from the open area of the LS memory and executes the PPE-serviced function.