GPU memory
GART表
ACE power gating
- three register:gating ctrl、wait count、status show
- ctrl target:hw(3D0/L2/VID
/VPP)、sw(add 3D ) - ctrl logic: hw first and will recover sw
- ctrl case: atuo->sw <engine idle, auto enable, sw enbale, disable auto> due to auto first. sw->auto <sw to wanna mode, auto enable , sw disable> due to escape step signal