From 9422cb8c75b3d09346aece73e26720ba96253615 Mon Sep 17 00:00:00 2001 From: Sami Mujawar Date: Fri, 19 Jan 2018 14:17:33 +0000 Subject: Platform/ARM/VExpressPkg: Provide only 64-bit ACPI entrypoint According to the SBBR Specification (ARM DEN 0044B), Section 4.2.1.1 "Within the RSDP, the RsdtAddress field must be null (zero) and the XsdtAddresss MUST be a valid, non-null, 64-bit value." The PcdAcpiExposedTableVersions is used to indicate the ACPI versions that are supported. The default value for PcdAcpiExposedTableVersions is 0x3E which indicates that the ACPI versions 1.0B and above are supported. For ACPI 1.0B the RSDT pointer is set in the RSDP table. However for ACPI versions greater than ACPI 1.0B the AcpiTableDxe populates the RSDP with the RSDT address set to NULL. Therefore set the PcdAcpiExposedTableVersions to 0x20 indicating support for ACPI 5.0 and above. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Sami Mujawar Signed-off-by: Evan Lloyd Reviewed-by: Ard Biesheuvel --- Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'Platform') diff --git a/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc b/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc index 295e9a126b..cdf9e2d497 100644 --- a/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc +++ b/Platform/ARM/VExpressPkg/ArmVExpress-FVP-AArch64.dsc @@ -1,5 +1,5 @@ # -# Copyright (c) 2011-2017, ARM Limited. All rights reserved. +# Copyright (c) 2011-2018, ARM Limited. All rights reserved. # # This program and the accompanying materials # are licensed and made available under the terms and conditions of the BSD License @@ -162,6 +162,11 @@ # the entire FVP address space can be covered by 36 bit VAs gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize|36 + # + # ACPI Table Version + # + gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiExposedTableVersions|0x20 + ################################################################################ # # Components Section - list of all EDK II Modules needed by this Platform -- cgit v1.2.3