OvmfPkg/PlatformPei: fix MTRR for low-RAM sizes that have many bits clear

[mirror_edk2.git] / OvmfPkg / PlatformPei / Platform.c

diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index fd8eccaf3e50cc133cfc1acb3adb949afc324fa1..c064b4ed9b8fb5e85ef3c9805a4dc4bcb40e1544 100644 (file)
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -174,14 +174,12 @@ MemMapInitialization (
   AddIoMemoryRangeHob (0x0A0000, BASE_1MB);\r
 \r
   if (!mXen) {\r
-    UINT32  TopOfLowRam;\r
     UINT64  PciExBarBase;\r
     UINT32  PciBase;\r
     UINT32  PciSize;\r
 \r
-    TopOfLowRam = GetSystemMemorySizeBelow4gb ();\r
     PciExBarBase = 0;\r
-    PciBase = (TopOfLowRam < BASE_2GB) ? BASE_2GB : TopOfLowRam;\r
+    PciBase = (mQemuUc32Base < BASE_2GB) ? BASE_2GB : mQemuUc32Base;\r
     if (mHostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {\r
       //\r
       // The 32-bit PCI host aperture is expected to fall between the top of\r