On 12/13/14 20:46, Arnd Bergmann wrote:
On Saturday 13 December 2014 11:05:52 Arend van Spriel wrote:
Makes sense. I think that is what Hauke meant by "adding
additional support for registering to bcma". So the discovery info is a
piece of read-only memory in the chip. Its address is stored in the
chipcommon core register space. BCMA parses that memory blob resulting
in a list of cores which register address info. We could add DT support
in BCMA matching the compatible string and register a core for it.
Ah, interesting idea. That would mirror what we do for drivers/amba,
I like the idea.
+ Rafal
Let's explore this. Although I don't have the iProc hardware to verify it.
However, apart from the discovery info a "discoverable ARM AXI" chip has
a register space per core that provides common procedures like
enable/disable, reset, core status, which are implemented in BCMA. I am
not seeing that register space in the DT examples so I guess this IP
block is not there for iProc chips.
I wouldn't draw conclusions from the absence of some node. Maybe these
registers are present but just not used by the original BSP.
I do not intend to. We have raised the question internally to iProc chip
designers.
Regards,
Arend
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