PcdClusterCount is actually not used anymore. I am keeping this PCD for now but I might remove it (I am waiting for ACPI support to know if it can be used).
PcdCoreCount is used for stack allocation. If your secondary cores are not parked into the UEFI Firmware then it should be ok (note: that is the case with ARM Trusted Firmware – the secondary cores are not parked into non-secure world).
From: Ryan Harkin [mailto:ryan.harkin@linaro.org]
Sent: 07 April 2014 17:40
To: Olivier Martin; edk2-devel@lists.sourceforge.net; linaro-uefi
Subject: Re: SF.net SVN: edk2:[15430] trunk/edk2/ArmPlatformPkg/ArmVExpressPkg/ ArmVExpress-FVP-AArch64.dsc
I always build a single UEFI binary for Foundation and FVP Base models by defining ARM_FOUNDATION_FVP, so I guess I am now going to have problems when I run on an AEMv8 4+4 model?
What would setting cores to 8 and clusters to 2 do to the Foundation model? Would it work OK?
On 3 April 2014 21:04, <oliviermartin@users.sourceforge.net> wrote:
Revision: 15430
http://sourceforge.net/p/edk2/code/15430
Author: oliviermartin
Date: 2014-04-03 20:04:39 +0000 (Thu, 03 Apr 2014)
Log Message:
-----------
ArmPlatformPkg/ArmVExpress-FVP-AArch64: Fixed number of cores and cluster for Base and Foundation models
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Modified Paths:
--------------
trunk/edk2/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc
Modified: trunk/edk2/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc
===================================================================
--- trunk/edk2/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc 2014-04-03 00:56:45 UTC (rev 15429)
+++ trunk/edk2/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc 2014-04-03 20:04:39 UTC (rev 15430)
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+# Copyright (c) 2011-2014, 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
@@ -80,8 +80,14 @@
gArmPlatformTokenSpaceGuid.PcdFirmwareVendor|"ARM Fixed Virtual Platform"
gEmbeddedTokenSpaceGuid.PcdEmbeddedPrompt|"ARM-FVP"
+!ifndef ARM_FOUNDATION_FVP
# Up to 8 cores on Base models. This works fine if model happens to have less.
gArmPlatformTokenSpaceGuid.PcdCoreCount|8
+ gArmPlatformTokenSpaceGuid.PcdClusterCount|2
+!else
+ # Up to 4 cores on Foundation models. This works fine if model happens to have less.
+ gArmPlatformTokenSpaceGuid.PcdCoreCount|4
+!endif
#
# NV Storage PCDs. Use base of 0x0C000000 for NOR1
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