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fusee: restore DRAM to 204MHz before starting main cpu on Mariko (closes #1600).

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Nintendo's Mariko tables result in trained frequency of 1599999 instead of 1600000.

PCV checks for rate == 1600000 exactly, when doing EMC init.

Thus EMC init does not succeed if we are trained to 1600000.

PCV has a fudge factor of 1000 used in SetEmcDvfsFreq, but this is not used in InitEmcDvfs.

This failure means that PCV cannot change rate back to 204MHz before sleep, and then after
wake extremely degraded performance is observed.

Restoring DRAM to 204MHz before boot causes EMC init to succeed/fixes performance degradation.
This commit is contained in:
Michael Scire
2021-08-30 07:19:28 -07:00
parent 1f065e3bac
commit c5edb031fa
31 changed files with 10747 additions and 15632 deletions
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Makefile
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@@ -65,7 +65,6 @@ dist-no-debug: all
mkdir -p atmosphere-$(AMSVER)/atmosphere/flags
touch atmosphere-$(AMSVER)/atmosphere/flags/clean_stratosphere_for_0.19.0.flag
cp fusee/fusee-primary/fusee-primary.bin atmosphere-$(AMSVER)/atmosphere/reboot_payload.bin
cp fusee/fusee-mtc/fusee-mtc.bin atmosphere-$(AMSVER)/atmosphere/fusee-mtc.bin
cp fusee/fusee-secondary/fusee-secondary-experimental.bin atmosphere-$(AMSVER)/atmosphere/fusee-secondary.bin
cp config_templates/BCT.ini atmosphere-$(AMSVER)/atmosphere/config_templates/BCT.ini
cp config_templates/override_config.ini atmosphere-$(AMSVER)/atmosphere/config_templates/override_config.ini