From 9952e73e166f2cdd9df473b8ac51565204a0d89e Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Wed, 14 Oct 2015 13:59:20 +0200
Subject: [PATCH 15/16] ArmPlatformPkg: PrePeiCore: write early hello message
 to the serial port (RH)

The FixedPcdGetSize() macro expands to an integer constant, therefore an
optimizing compiler can eliminate the new code, if the platform DSC
doesn't override the empty string (size=1) default of
PcdEarlyHelloMessage.

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1270279
Downstream only:
<http://thread.gmane.org/gmane.comp.bios.edk2.devel/2996/focus=3433>.

Notes about the 20160608b-988715a -> 20170228-c325e41585e3 rebase:

- no changes

Notes about the 20170228-c325e41585e3 -> 20171011-92d07e48907f rebase:

- no changes

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
(cherry picked from commit b16c4c505ce0e27305235533eac9236aa66f132e)
(cherry picked from commit 742e5bf6d5ce5a1e73879d6e5c0dd00feda7a9ac)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 ArmPlatformPkg/PrePeiCore/MainMPCore.c          | 5 +++++
 ArmPlatformPkg/PrePeiCore/MainUniCore.c         | 5 +++++
 ArmPlatformPkg/PrePeiCore/PrePeiCore.h          | 1 +
 ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf  | 2 ++
 ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf | 2 ++
 5 files changed, 15 insertions(+)

diff --git a/ArmPlatformPkg/PrePeiCore/MainMPCore.c b/ArmPlatformPkg/PrePeiCore/MainMPCore.c
index dc47adb..cbd7223 100644
--- a/ArmPlatformPkg/PrePeiCore/MainMPCore.c
+++ b/ArmPlatformPkg/PrePeiCore/MainMPCore.c
@@ -117,6 +117,11 @@ PrimaryMain (
   UINTN                       TemporaryRamBase;
   UINTN                       TemporaryRamSize;
 
+  if (FixedPcdGetSize (PcdEarlyHelloMessage) > 1) {
+    SerialPortWrite (FixedPcdGetPtr (PcdEarlyHelloMessage),
+      FixedPcdGetSize (PcdEarlyHelloMessage) - 1);
+  }
+
   CreatePpiList (&PpiListSize, &PpiList);
 
   // Enable the GIC Distributor
diff --git a/ArmPlatformPkg/PrePeiCore/MainUniCore.c b/ArmPlatformPkg/PrePeiCore/MainUniCore.c
index 134a469..af39fc0 100644
--- a/ArmPlatformPkg/PrePeiCore/MainUniCore.c
+++ b/ArmPlatformPkg/PrePeiCore/MainUniCore.c
@@ -35,6 +35,11 @@ PrimaryMain (
   UINTN                       TemporaryRamBase;
   UINTN                       TemporaryRamSize;
 
+  if (FixedPcdGetSize (PcdEarlyHelloMessage) > 1) {
+    SerialPortWrite (FixedPcdGetPtr (PcdEarlyHelloMessage),
+      FixedPcdGetSize (PcdEarlyHelloMessage) - 1);
+  }
+
   CreatePpiList (&PpiListSize, &PpiList);
 
   // Adjust the Temporary Ram as the new Ppi List (Common + Platform Ppi Lists) is created at
diff --git a/ArmPlatformPkg/PrePeiCore/PrePeiCore.h b/ArmPlatformPkg/PrePeiCore/PrePeiCore.h
index 1608946..bf843d7 100644
--- a/ArmPlatformPkg/PrePeiCore/PrePeiCore.h
+++ b/ArmPlatformPkg/PrePeiCore/PrePeiCore.h
@@ -21,6 +21,7 @@
 #include <Library/DebugLib.h>
 #include <Library/IoLib.h>
 #include <Library/PcdLib.h>
+#include <Library/SerialPortLib.h>
 
 #include <PiPei.h>
 #include <Ppi/TemporaryRamSupport.h>
diff --git a/ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf b/ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf
index e3a31fa..1bc0c45 100644
--- a/ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf
+++ b/ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf
@@ -72,6 +72,8 @@
   gArmPlatformTokenSpaceGuid.PcdCPUCorePrimaryStackSize
   gArmPlatformTokenSpaceGuid.PcdCPUCoreSecondaryStackSize
 
+  gArmPlatformTokenSpaceGuid.PcdEarlyHelloMessage
+
   gArmTokenSpaceGuid.PcdGicDistributorBase
   gArmTokenSpaceGuid.PcdGicInterruptInterfaceBase
   gArmTokenSpaceGuid.PcdGicSgiIntId
diff --git a/ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf b/ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf
index ec83cec..20698fc 100644
--- a/ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf
+++ b/ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf
@@ -71,3 +71,5 @@
   gArmPlatformTokenSpaceGuid.PcdCPUCoreSecondaryStackSize
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdInitValueInTempStack
+
+  gArmPlatformTokenSpaceGuid.PcdEarlyHelloMessage
-- 
2.17.0