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DxeIpl: Fallback to 0xCF9 for reset register

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This commit is contained in:
Goldfish64 2020-11-08 12:59:20 -06:00
parent 6d0c49e84c
commit eb5776f8f1
1 changed files with 22 additions and 34 deletions
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56
Legacy/BootPlatform/DxeIpl/LegacyTable.c
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@ -306,43 +306,31 @@ PrepareFadtTable (
sizeof(EFI_ACPI_3_0_GENERIC_ADDRESS_STRUCTURE)
);
}
if (Fadt->Header.Length >= OFFSET_OF (EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE, ResetValue) + sizeof (Fadt->ResetValue)) {
//
// Ensure FADT register information is valid and can be trusted before using.
// If not, use universal register settings. See AcpiFadtEnableReset() in OcAcpiLib.
//
if (Fadt->ResetReg.Address != 0 && Fadt->ResetReg.RegisterBitWidth == 8) {
CopyMem (
&AcpiDescription->RESET_REG,
&Fadt->ResetReg,
sizeof(EFI_ACPI_3_0_GENERIC_ADDRESS_STRUCTURE)
);
AcpiDescription->RESET_VALUE = Fadt->ResetValue;
} else {
//
// Use mostly universal default of 0xCF9.
//
AcpiDescription->RESET_REG.Address = 0xCF9;
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;
}
//
// Ensure FADT register information is valid and can be trusted before using.
// If not, use universal register settings. See AcpiFadtEnableReset() in OcAcpiLib.
//
if (Fadt->Header.Length >= OFFSET_OF (EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE, ResetValue) + sizeof (Fadt->ResetValue)
&& Fadt->ResetReg.Address != 0
&& Fadt->ResetReg.RegisterBitWidth == 8) {
CopyMem (
&AcpiDescription->RESET_REG,
&Fadt->ResetReg,
sizeof(EFI_ACPI_3_0_GENERIC_ADDRESS_STRUCTURE)
);
AcpiDescription->RESET_VALUE = Fadt->ResetValue;
} else {
//
// ** CHANGE START **
// Otherwise fill with defaults.
//
AcpiDescription->RESET_REG.Address = 0x64;
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 = 0xFE;
//
// ** CHANGE END **
// Use mostly universal default of 0xCF9.
//
AcpiDescription->RESET_REG.Address = 0xCF9;
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;
}
//