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While we had support for updating microcode on the VIA Nano CPUs for a
while now, we never included the actual microcode. Unlike, Intel and
AMD CPUs, VIA microcode is not available for download, and was
extracted from the vendor BIOS. It was not included in coreboot since
we never had explicit permission to do so. I have just received
confirmation from VIA that we can distribute the microcode.
Change-Id: I4c15b090cd2713cfe5dc6b50db777ff89dbc0f19
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/3357
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
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The use of ramstage.a required the build system to handle some
object files in a special way, which were put in the drivers
class.
These object files didn't provide any symbols that were used
directly (but only via linker magic), and so the linker never
considered them for inclusion.
With ramstage.a gone, we can drop this special class, too.
Change-Id: I6f1369e08d7d12266b506a5597c3a139c5c41a55
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/1872
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
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Add code to do the following for the VIA Nano CPUs
- Update microcode
- Set maximum frequency
- Initialize power states
- Set up cache
Attempting to change the voltage or frequency of the CPU without
applying the microcode update will hang the CPU, so we only do
transitions if we can verify the microcode has been updated.
The microcode is updated directly from CBFS. No microcode is
included in ramstage. The microcode is not included in this
commit.
To get the microcode, run bios_extract on the manufacturer supplied
BIOS, and look for the file marked "P6 Microcode". Include this
file in CBFS.
You can have the build system include this file automatically by
selecting Expert Mode, then look under
'Chipset' -> 'Include CPU microcode in CBFS' ->
Include external microcode file (check)
'Path and filename of CPU microcode' should contain the location of
the microcode file previously extracted.
Change-Id: I586aaca5715e047b42ef901d66772ace0e6b655e
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/1257
Tested-by: build bot (Jenkins)
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