From 68978a52aedbca80bfa787250b1ad78e303ddc4f Mon Sep 17 00:00:00 2001
From: oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 26 Sep 2012 20:24:10 +0000
Subject: [PATCH] ArmPlatformPkg/EblCmdLib: Fixed 'performance' command

Added support for performance counter that counts up or down

Signed-off-by: Olivier Martin <olivier.martin@arm.com>




git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13747 6f19259b-4bc3-4df7-8a09-765794883524
---
 ArmPlatformPkg/Library/EblCmdLib/EblCmdLib.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/ArmPlatformPkg/Library/EblCmdLib/EblCmdLib.c b/ArmPlatformPkg/Library/EblCmdLib/EblCmdLib.c
index f9e4b40a8e..4c298a61cf 100644
--- a/ArmPlatformPkg/Library/EblCmdLib/EblCmdLib.c
+++ b/ArmPlatformPkg/Library/EblCmdLib/EblCmdLib.c
@@ -223,8 +223,14 @@ EblPerformance (
   UINT64      Start, Stop, TimeStamp;
   UINT64      Delta, TicksPerSecond, Milliseconds, Microseconds;
   UINTN       Index;
+  BOOLEAN     CountUp;
 
-  TicksPerSecond = GetPerformanceCounterProperties (NULL, NULL);
+  TicksPerSecond = GetPerformanceCounterProperties (&Start, &Stop);
+  if (Start < Stop) {
+    CountUp = TRUE;
+  } else {
+    CountUp = FALSE;
+  }
 
   Key       = 0;
   do {
@@ -235,7 +241,7 @@ EblPerformance (
           // The entry for EBL is still running so the stop time will be zero. Skip it
           AsciiPrint ("   running     %a\n", ImageHandleToPdbFileName ((EFI_HANDLE)Handle));
         } else {
-          Delta = Start - Stop;
+          Delta =  CountUp?(Stop - Start):(Start - Stop);
           Microseconds = DivU64x64Remainder (MultU64x32 (Delta, 1000000), TicksPerSecond, NULL);
           AsciiPrint ("%10ld us  %a\n", Microseconds, ImageHandleToPdbFileName ((EFI_HANDLE)Handle));
         }
@@ -252,7 +258,7 @@ EblPerformance (
     if (Key != 0) {
       for (Index = 0; mTokenList[Index] != NULL; Index++) {
         if (AsciiStriCmp (mTokenList[Index], Token) == 0) {
-          Delta = Start - Stop;
+          Delta =  CountUp?(Stop - Start):(Start - Stop);
           TimeStamp += Delta;
           Milliseconds = DivU64x64Remainder (MultU64x32 (Delta, 1000), TicksPerSecond, NULL);
           AsciiPrint ("%6a %6ld ms\n", Token, Milliseconds);