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soc/amd/picasso/soc_util: add comment on the silicon and soc types 

Change-Id: I71704ab292edf8bd343370e6b72c47a8f3aceffd
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42838
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Felix Held 2020-06-26 19:15:43 +02:00 committed by Felix Held
parent 38569d0610
commit af05c86dcb
1 changed files with 8 additions and 0 deletions
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8
src/soc/amd/picasso/soc_util.c
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@ -9,6 +9,14 @@
#include <soc/soc_util.h> #include <soc/soc_util.h>
#include <types.h> #include <types.h>
/*
* The Zen/Zen+ based APUs can be RV (sometimes called RV1), PCO or RV2 silicon. RV2 has less
* PCIe, USB3 and DisplayPort connectivity than RV(1) or PCO. A Picasso SoC is always PCO
* silicon, a Dali SoC can either be RV2 or fused-down PCO silicon that has the same
* connectivity as the RV2 one and Pollock is always RV2 silicon. Picasso and Dali are in a FP5
* package while Pollock is in the smaller FT5 package.
*/
#define SOCKET_TYPE_SHIFT 28 #define SOCKET_TYPE_SHIFT 28
#define SOCKET_TYPSE_MASK (0xf << SOCKET_TYPE_SHIFT) #define SOCKET_TYPSE_MASK (0xf << SOCKET_TYPE_SHIFT)