Invention Grant
- Patent Title: Persistent relocatable reset vector for processor
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Application No.: US13750013Application Date: 2013-01-25
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Publication No.: US09959120B2Publication Date: 2018-05-01
- Inventor: Josh P. de Cesare , Gerard R. Williams, III , Michael J. Smith , Wei-Han Lien
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Lawrence J. Merkel
- Main IPC: G06F1/32
- IPC: G06F1/32 ; G06F9/32 ; G06F9/30

Abstract:
In an embodiment, an integrated circuit includes at least one processor. The processor may include a reset vector base address register configured to store a reset vector address for the processor. Responsive to a reset, the processor may be configured to capture a reset vector address on an input, updating the reset vector base address register. Upon release from reset, the processor may initiate instruction execution at the reset vector address. The integrated circuit may further include a logic circuit that is coupled to provide the reset vector address. The logic circuit may include a register that is programmable with the reset vector address. More particularly, in an embodiment, the register may be programmable via a write operation issued by the processor (e.g. a memory-mapped write operation). Accordingly, the reset vector address may be programmable in the integrated circuit, and may be changed from time to time.
Public/Granted literature
- US20140215182A1 Persistent Relocatable Reset Vector for Processor Public/Granted day:2014-07-31
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