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 29d07788dcd40304003c870b882b784e3f88a941..19776100a5ef3972619da5951b898b1be533f09d 100644 (file)
--- 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 }\r
 !endif\r
 \r
+  #\r
+  # The maximum physical I/O addressability of the processor, set with\r
+  # BuildCpuHob().\r
+  #\r
+  gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize|16\r
+\r
 [PcdsDynamicDefault.common]\r
   ## If TRUE, OvmfPkg/AcpiPlatformDxe will not wait for PCI\r
   #  enumeration to complete before installing ACPI tables.\r