发明授权
- 专利标题： Method for managing operability of on-chip debug capability
- 专利标题（中）： 管理片上调试功能的可操作性的方法
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申请号： US11438998申请日： 2006-05-22
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公开(公告)号： US07849315B2公开(公告)日： 2010-12-07
- 发明人: Douglas A. Hardy , Francis G. Sydnor , William K. Oh
- 申请人： Douglas A. Hardy , Francis G. Sydnor , William K. Oh
- 申请人地址： US AZ Scottsdale
- 专利权人： General Dynamics C4 Systems, Inc.
- 当前专利权人： General Dynamics C4 Systems, Inc.
- 当前专利权人地址： US AZ Scottsdale
- 代理机构： Meschkow & Gresham, P.L.C.
- 主分类号： H04L9/32
- IPC分类号： H04L9/32 ; G06F21/00
摘要：
A method for managing operability of an on-chip debug capability (24) in a product (26) configured to execute software (30) includes storing (74, 76) a debug public key (40) and an operational public key (44) in product memory (54). The software (30) with either a debug signature (82) or an operational signature (88) is saved (84) in the memory (56). When enablement indication is received, the debug signature (82) is validated (102) using the debug public key (40). The debug capability (24) is enabled upon validation of the signature (82) and the software (30) is allowed to execute. When disablement indication is received, the operational signature (88) is verified (112) using the operational public key (44). The on-chip debug capability (24) is disabled upon verification of the signature (88) and the software (30) is allowed to execute.
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