Re: How to recognize a LEON CPU?

[Daniel Hellstrom <daniel@xxxxxxxxxxx>]

On 05/21/2012 11:12 PM, David Miller wrote:
> From: Sam Ravnborg<sam@xxxxxxxxxxxx>
> Date: Mon, 21 May 2012 18:22:53 +0200
>
> > I assume this can be determinded from PSR.
> > From arch/sparc/kernel/cpu.c:
>
> psr IMPL 0xf with psr VERS of 3
Correct. As I written Sam:

The LEON is SPARC compliant and has a registered number, from the manual (http://gaisler.com/products/grlib/grip.pdf section LEON3 and LEON4):

65.2.3 SPARC Implementor's ID
Gaisler Research is assigned number 15 (0xF) as SPARC implementor's identification. This value is
hard-coded into bits 31:28 in the %psr register. The version number for LEON3 is 3, which is hard-
coded in to bits 27:24 of the %psr.


Note that LEON3 and LEON4 have the same version number, they are software compatible.

Daniel
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