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ARM Community: How to identify which processor is the primary processor of cortex-A9 MPcore? - ARM Community

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How to identify which processor is the primary processor of cortex-A9 MPcore? Rate Topic: -----

#1 User is offline   0254081 

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Posted 13 July 2011 - 03:49 PM

Dear All,

In Cortex-A9 MPCore Technical Reference Manual, there are the following multiprocessor bring-up statements.

For the primary processor:
1. Invalidate the data cache
2. Invalidate the SCU duplicate tags for all processors.
3. Invalidate the L2C-310, if used.
4. Enable the SCU
5. Enable the data cache
6. Enable the L2C-310
7. Set SMP mode with ACTLR.SMP.

For non-primary processors:
1. Invalidate the data cache
2. Enable the data cache
3. Set SMP with ACTLR.SMP.

Anyone knows how to identify which processor is the primary processor of cortex-A9 MPcore? Thanks.

This post has been edited by 0254081: 13 July 2011 - 03:56 PM

Dong
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#2 User is offline   isogen74 

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Posted 13 July 2011 - 07:02 PM

See ...
http://infocenter.ar...e/CACEDHJG.html

Iso
When optimizing software, consider that the quickest code to run is the bit you removed from the call path.
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#3 User is offline   Jerry Fan 

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Posted 16 July 2011 - 11:03 PM

View Postisogen74, on 13 July 2011 - 07:02 PM, said:

See ...
http://infocenter.ar...e/CACEDHJG.html

Iso


And the CPU0 is the primary CPU usually.
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