From: Laszlo Ersek <lersek@redhat.com>
Date: Mon, 23 Feb 2015 16:03:32 +0000 (+0000)
Subject: ArmVirtualizationPkg/ArmVirtualizationQemu: enable IO addressing
X-Git-Tag: edk2-stable201903~10265
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=1ff2b5a833ab9000f73dfc771a5d730f3c3a8db1;hp=286c88bcce13dc88fffbcedd0fd2455790078e97;p=mirror_edk2.git

ArmVirtualizationPkg/ArmVirtualizationQemu: enable IO addressing

Set gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize to 16, which determines the
maximum "I/O address width".

This ensures, through the BuildCpuHob() call in
"ArmPkg/Drivers/CpuPei/CpuPei.c", that the inital I/O Space Map will
consist of a 16-bit wide "splittable" entry, when the DXE core starts (see
CoreInitializeGcdServices() in "MdeModulePkg/Core/Dxe/Gcd/Gcd.c"):

  GCD:Initial GCD I/O Space Map
  GCDIoType  Range
  ========== =================================
  NonExist   0000000000000000-000000000000FFFF

Otherwise this range would have size 0, and (since it could not be split)
any gDS->AddIoSpace() calls would fail.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Olivier Martin <Olivier.martin@arm.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16902 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationQemu.dsc b/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationQemu.dsc
index 29d07788dc..19776100a5 100644
--- a/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationQemu.dsc
+++ b/ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationQemu.dsc
@@ -156,6 +156,12 @@
   gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdShellFile|{ 0x83, 0xA5, 0x04, 0x7C, 0x3E, 0x9E, 0x1C, 0x4F, 0xAD, 0x65, 0xE0, 0x52, 0x68, 0xD0, 0xB4, 0xD1 }
 !endif
 
+  #
+  # The maximum physical I/O addressability of the processor, set with
+  # BuildCpuHob().
+  #
+  gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize|16
+
 [PcdsDynamicDefault.common]
   ## If TRUE, OvmfPkg/AcpiPlatformDxe will not wait for PCI
   #  enumeration to complete before installing ACPI tables.