Disable EC SMI (GPI) on AMD Chipset

How to disable EC SMI on AMD Chipset?
We can set the SMI registers to turn off EC SMI in FCH specification.
SMI registers are accessed by memory-mapped IO or IO-mapped, the range from "AcpiMMioAddr" + 0x200 to "AcpiMMioAddr" + 0x2FF offset 0x14 that register name is SmiSciEn. Every bit presents every GEvent. If Gevent 23 is EC SMI pin, we need to clear the value of SmiSciEn bit 23 that can disable EC SMI. When SmiSciStatus bit 23 is set and SmiSciEn bit 23 is set, it will trigger a SMI to call the BIOS to do SMI function.

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如何禁能AMD chipset的EC SMI?
透過設定FCH的SMI暫存器去關掉EC SMI。
SMI暫存器可以使用記憶體映對IO或IO映對的方式存取，其範圍從"AcpiMMioAddr" + 0x200 to "AcpiMMioAddr" + 0x2FF offset 0x14的SmiSciEn暫存器名稱，每一個位元都代表一個GEevent。
如果EC SMI腳位是使用GEvent 23，我們可以透過清掉SmiSciEn的位元23去禁能EC SMI。當SmiSciStatus bit23被設成1且SmiSciEn bit23被設定成1，將會觸發一個SMI去呼叫BIOS的SMI function。