ArmPlatformPkg/PrePeiCore: Print the firmware version early in boot

Copy code from PrePi to PrePeiCore that prints the firmware version
and build date early in the boot process.

Signed-off-by: Rebecca Cran <rebecca@quicinc.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Tested-by: Oliver Steffen <osteffen@redhat.com>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>

ArmPlatformPkg/PrePeiCore/PrePeiCore.c

@@ -11,6 +11,8 @@
 #include <Library/CacheMaintenanceLib.h>
 #include <Library/DebugAgentLib.h>
 #include <Library/ArmLib.h>
+#include <Library/PrintLib.h>
+#include <Library/SerialPortLib.h>
 
 #include "PrePeiCore.h"
 
@@ -52,6 +54,31 @@ CreatePpiList (
   *PpiListSize = sizeof (gCommonPpiTable) + PlatformPpiListSize;
 }
 
+/**
+
+ Prints firmware version and build time to serial console.
+
+**/
+STATIC
+VOID
+PrintFirmwareVersion (
+  VOID
+  )
+{
+  CHAR8  Buffer[100];
+  UINTN  CharCount;
+
+  CharCount = AsciiSPrint (
+                Buffer,
+                sizeof (Buffer),
+                "UEFI firmware (version %s built at %a on %a)\n\r",
+                (CHAR16 *)PcdGetPtr (PcdFirmwareVersionString),
+                __TIME__,
+                __DATE__
+                );
+  SerialPortWrite ((UINT8 *)Buffer, CharCount);
+}
+
 VOID
 CEntryPoint (
   IN  UINTN                     MpId,
@@ -96,6 +123,8 @@ CEntryPoint (
     // called.
     ProcessLibraryConstructorList ();
 
+    PrintFirmwareVersion ();
+
     // Initialize the Debug Agent for Source Level Debugging
     InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
     SaveAndSetDebugTimerInterrupt (TRUE);

ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf

@@ -54,6 +54,9 @@
   gEfiTemporaryRamSupportPpiGuid
   gArmMpCoreInfoPpiGuid
 
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFirmwareVersionString
+
 [FeaturePcd]
   gArmPlatformTokenSpaceGuid.PcdSendSgiToBringUpSecondaryCores
 

ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf

@@ -52,6 +52,9 @@
 [Ppis]
   gEfiTemporaryRamSupportPpiGuid
 
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFirmwareVersionString
+
 [FeaturePcd]
   gArmPlatformTokenSpaceGuid.PcdSendSgiToBringUpSecondaryCores