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JBlac9
Novice
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Intel System Studio 2015 (Beta) Quark JTAG access to MSR

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Is it possible to gain access to the Quark's Model-Specific Registers (MSR) via JTAG using the XDB?

If it is possible, in which way can I gain access to these registers?

The Quark Debug Operations Manual suggests this [Direct quote form the Quark Debug Ops Manual, Section 5.6.11]:

MSRs may be accessed (read and written) using the following flow:
1. Write the MSR index value to the ECX register using normal SRAM write operation.
2. Read:
a. Submit an ‘rdmsr’ instruction to the core via WRITEPIR and SUBMITPIR.
b. Bits 31:0 of the MSR data will be in EAX; bits 63:32 of the MSR data will be
EDX.
3. Write:
a. Move bits 31:0 of the data to be written to EAX; move bits 63:32 of the data
to EDX.
b. Submit a ‘wrmsr’ instruction to the core via WRITEPIR and SUBMITPIR.

 If this is the correct method to access the MSRs with XDB, how would I instruct the XDB to do this?

Thank you beforehand for any help you may be able to provide me.

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Paul_F_Intel
Employee
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The debugger has a view option called MSR - Modell Specific Registers.

Does that show the registers you are looking for?

 

 

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Paul_F_Intel
Employee
56 Views

The debugger has a view option called MSR - Modell Specific Registers.

Does that show the registers you are looking for?

 

 

View solution in original post

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JBlac9
Novice
55 Views

Paul Farquhar

Thank you for the suggestion; I found the suggested item on the menu. It does show the desired registers.

Regards

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