OcAcpiLib: Fix FadtEnableReset on nForce platforms

Use reset register 0x64 (keyboard controller) instead of 0xCF9.

Changelog.md

@@ -9,6 +9,7 @@ OpenCore Changelog
 - Fixed incorrect core count on Silvermont Atom/Celeron processors
 - Fixed PM timer detection on Silvermont Atom/Celeron processors for TSC calculations
 - Fixed PM timer detection on non-Intel chipsets when booted through OpenDuet
+- Fixed `FadtEnableReset` on NVIDIA nForce chipset platforms
 
 #### v0.9.3
 - Added `--force-codec` option to AudioDxe, thx @xCuri0

Legacy/BootPlatform/DxeIpl/DxeIpl.inf

@@ -35,6 +35,7 @@
   PrintLib
   ReportStatusCodeLib
   IoLib
+  PciLib
 
 [Guids]
   gEfiVariableGuid

Legacy/BootPlatform/DxeIpl/LegacyTable.c

@@ -21,11 +21,15 @@ Revision History:
 #include "DxeIpl.h"
 #include "HobGeneration.h"
 
+#include <Library/PciLib.h>
+
 #define MPS_PTR     SIGNATURE_32('_','M','P','_')
 #define SMBIOS_PTR  SIGNATURE_32('_','S','M','_')
 
 #define EBDA_BASE_ADDRESS  0x40E
 
+#define PCI_VENDOR_NVIDIA  0x10DE
+
 VOID *
 FindAcpiRsdPtr (
   VOID
@@ -327,15 +331,24 @@ PrepareFadtTable (
       );
     AcpiDescription->RESET_VALUE = Fadt->ResetValue;
   } else {
-    //
-    // Use mostly universal default of 0xCF9.
-    //
-    AcpiDescription->RESET_REG.Address           = 0xCF9;
+    if (PciRead16 (0) == PCI_VENDOR_NVIDIA) {
+      //
+      // Use 0x64 / 0xFE on NVIDIA chipset platforms.
+      //
+      AcpiDescription->RESET_REG.Address = 0x64;
+      AcpiDescription->RESET_VALUE       = 0xFE;
+    } else {
+      //
+      // Use mostly universal default of 0xCF9.
+      //
+      AcpiDescription->RESET_REG.Address = 0xCF9;
+      AcpiDescription->RESET_VALUE       = 6;
+    }
+
     AcpiDescription->RESET_REG.AddressSpaceId    = EFI_ACPI_3_0_SYSTEM_IO;
     AcpiDescription->RESET_REG.RegisterBitWidth  = 8;
     AcpiDescription->RESET_REG.RegisterBitOffset = 0;
     AcpiDescription->RESET_REG.AccessSize        = EFI_ACPI_3_0_BYTE;
-    AcpiDescription->RESET_VALUE                 = 6;
   }
 
   //

Library/OcAcpiLib/OcAcpiLib.c

@@ -21,6 +21,7 @@
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/OcMemoryLib.h>
 #include <Library/OcMiscLib.h>
+#include <Library/PciLib.h>
 
 #include <IndustryStandard/AcpiAml.h>
 #include <IndustryStandard/Acpi.h>
@@ -29,6 +30,8 @@
 
 #include <Library/OcAcpiLib.h>
 
+#define PCI_VENDOR_NVIDIA  0x10DE
+
 /**
   Find RSD_PTR Table In Legacy Area
 
@@ -1564,12 +1567,24 @@ AcpiFadtEnableReset (
     // Resetting through port 0xCF9 is universal on Intel and AMD.
     // But may not be the case on e.g. Dell laptops and desktops, which use 0xB2.
     //
+    if (PciRead16 (0) == PCI_VENDOR_NVIDIA) {
+      //
+      // Use 0x64 / 0xFE on NVIDIA chipset platforms.
+      //
+      Context->Fadt->ResetReg.Address = 0x64;
+      Context->Fadt->ResetValue       = 0xFE;
+    } else {
+      //
+      // Use mostly universal default of 0xCF9.
+      //
+      Context->Fadt->ResetReg.Address = 0xCF9;
+      Context->Fadt->ResetValue       = 6;
+    }
+
     Context->Fadt->ResetReg.AddressSpaceId    = EFI_ACPI_6_2_SYSTEM_IO;
     Context->Fadt->ResetReg.RegisterBitWidth  = 8;
     Context->Fadt->ResetReg.RegisterBitOffset = 0;
     Context->Fadt->ResetReg.AccessSize        = EFI_ACPI_6_2_BYTE;
-    Context->Fadt->ResetReg.Address           = 0xCF9;
-    Context->Fadt->ResetValue                 = 6;
   }
 
   AcpiRefreshTableChecksum ((EFI_ACPI_DESCRIPTION_HEADER *)Context->Fadt);

Library/OcAcpiLib/OcAcpiLib.inf

@@ -40,6 +40,7 @@
   OcMemoryLib
   OcMiscLib
   PrintLib
+  PciLib
 
 [Guids]
   gEfiAcpi10TableGuid