[PATCH v4 3/3] UefiPayloadPkg: Support variable size MMCONF space

["Marcello Sylvester Bauer" <marcello.bauer@9elements.com>]

The default size is still 256MiB, but will be overwritten by
UefiPayloadPkg with the real MMCONF size.

e.g.: On embedded AMD platforms the MMCONF window size is usually
      only 64MiB.

Fixes crash on platforms not exposing 256 buses.
Tested on:
* AMD Stoney Ridge

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Marcello Sylvester Bauer <marcello.bauer@9elements.com>
Cc: Patrick Rudolph <patrick.rudolph@9elements.com>
Cc: Christian Walter <christian.walter@9elements.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
---
 UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc     | 1 +
 UefiPayloadPkg/BlSupportDxe/BlSupportDxe.inf | 1 +
 UefiPayloadPkg/BlSupportDxe/BlSupportDxe.c   | 4 +++-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc b/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
index a768a8702c66..162cbf47a83f 100644
--- a/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
+++ b/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
@@ -363,6 +363,7 @@ [PcdsDynamicDefault]
   gEfiMdeModulePkgTokenSpaceGuid.PcdConOutRow|31
   gEfiMdeModulePkgTokenSpaceGuid.PcdConOutColumn|100
   gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress|0
+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseSize|0
 
 ################################################################################
 #
diff --git a/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.inf b/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.inf
index 1371d5eb7952..cebc81135565 100644
--- a/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.inf
+++ b/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.inf
@@ -54,6 +54,7 @@ [Pcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdSetupVideoHorizontalResolution
   gEfiMdeModulePkgTokenSpaceGuid.PcdSetupVideoVerticalResolution
   gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseSize
 
 [Depex]
   TRUE
diff --git a/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.c b/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.c
index a3974dcc02f8..a746d0581ee3 100644
--- a/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.c
+++ b/UefiPayloadPkg/BlSupportDxe/BlSupportDxe.c
@@ -155,13 +155,15 @@ BlDxeEntryPoint (
   }
 
   //
-  // Set PcdPciExpressBaseAddress by HOB info
+  // Set PcdPciExpressBaseAddress and PcdPciExpressBaseSize by HOB info
   //
   GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
   if (GuidHob != NULL) {
     AcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
     Status = PcdSet64S (PcdPciExpressBaseAddress, AcpiBoardInfo->PcieBaseAddress);
     ASSERT_EFI_ERROR (Status);
+    Status = PcdSet64S (PcdPciExpressBaseSize, AcpiBoardInfo->PcieBaseSize);
+    ASSERT_EFI_ERROR (Status);
   }
 
   return EFI_SUCCESS;
-- 
2.27.0