[PATCH 3/3] ArmPlatformPkg, ArmVirtPkg: delete redundant PL031 functions

[Leif Lindholm <leif.lindholm@linaro.org>]

Remove the functions now provided by EfiTimeBaseLib from
PL031RealTimeClockLib. Add EfiTimeBaseLib resolution to ArmVirtPkg
in same commit to prevent breakage.

Cc: Laszlo Ersek <lersek@redhat.com>

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
---
 .../Include/Drivers/PL031RealTimeClock.h           |  11 --
 .../PL031RealTimeClockLib/PL031RealTimeClockLib.c  | 127 +--------------------
 .../PL031RealTimeClockLib.inf                      |   1 +
 ArmVirtPkg/ArmVirt.dsc.inc                         |   1 +
 4 files changed, 5 insertions(+), 135 deletions(-)

diff --git a/ArmPlatformPkg/Include/Drivers/PL031RealTimeClock.h b/ArmPlatformPkg/Include/Drivers/PL031RealTimeClock.h
index 76fbd0eb82..812cd9b397 100644
--- a/ArmPlatformPkg/Include/Drivers/PL031RealTimeClock.h
+++ b/ArmPlatformPkg/Include/Drivers/PL031RealTimeClock.h
@@ -42,15 +42,4 @@
 
 #define PL031_COUNTS_PER_SECOND                         1
 
-// Define EPOCH (1970-JANUARY-01) in the Julian Date representation
-#define EPOCH_JULIAN_DATE                               2440588
-
-// Seconds per unit
-#define SEC_PER_MIN                                     ((UINTN)    60)
-#define SEC_PER_HOUR                                    ((UINTN)  3600)
-#define SEC_PER_DAY                                     ((UINTN) 86400)
-
-#define SEC_PER_MONTH                                   ((UINTN)  2,592,000)
-#define SEC_PER_YEAR                                    ((UINTN) 31,536,000)
-
 #endif
diff --git a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
index 4aa448b528..9f115d383c 100644
--- a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
+++ b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
@@ -36,6 +36,8 @@
 
 #include <Drivers/PL031RealTimeClock.h>
 
+#include <Library/EfiTimeBaseLib.h>
+
 #include <ArmPlatform.h>
 
 STATIC CONST CHAR16           mTimeZoneVariableName[] = L"PL031RtcTimeZone";
@@ -110,129 +112,6 @@ InitializePL031 (
 }
 
 /**
-  Converts Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) to EFI_TIME
- **/
-VOID
-EpochToEfiTime (
-  IN  UINTN     EpochSeconds,
-  OUT EFI_TIME  *Time
-  )
-{
-  UINTN         a;
-  UINTN         b;
-  UINTN         c;
-  UINTN         d;
-  UINTN         g;
-  UINTN         j;
-  UINTN         m;
-  UINTN         y;
-  UINTN         da;
-  UINTN         db;
-  UINTN         dc;
-  UINTN         dg;
-  UINTN         hh;
-  UINTN         mm;
-  UINTN         ss;
-  UINTN         J;
-
-  J  = (EpochSeconds / 86400) + 2440588;
-  j  = J + 32044;
-  g  = j / 146097;
-  dg = j % 146097;
-  c  = (((dg / 36524) + 1) * 3) / 4;
-  dc = dg - (c * 36524);
-  b  = dc / 1461;
-  db = dc % 1461;
-  a  = (((db / 365) + 1) * 3) / 4;
-  da = db - (a * 365);
-  y  = (g * 400) + (c * 100) + (b * 4) + a;
-  m  = (((da * 5) + 308) / 153) - 2;
-  d  = da - (((m + 4) * 153) / 5) + 122;
-
-  Time->Year  = y - 4800 + ((m + 2) / 12);
-  Time->Month = ((m + 2) % 12) + 1;
-  Time->Day   = d + 1;
-
-  ss = EpochSeconds % 60;
-  a  = (EpochSeconds - ss) / 60;
-  mm = a % 60;
-  b = (a - mm) / 60;
-  hh = b % 24;
-
-  Time->Hour        = hh;
-  Time->Minute      = mm;
-  Time->Second      = ss;
-  Time->Nanosecond  = 0;
-
-}
-
-/**
-  Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC)
- **/
-UINTN
-EfiTimeToEpoch (
-  IN  EFI_TIME  *Time
-  )
-{
-  UINTN a;
-  UINTN y;
-  UINTN m;
-  UINTN JulianDate;  // Absolute Julian Date representation of the supplied Time
-  UINTN EpochDays;   // Number of days elapsed since EPOCH_JULIAN_DAY
-  UINTN EpochSeconds;
-
-  a = (14 - Time->Month) / 12 ;
-  y = Time->Year + 4800 - a;
-  m = Time->Month + (12*a) - 3;
-
-  JulianDate = Time->Day + ((153*m + 2)/5) + (365*y) + (y/4) - (y/100) + (y/400) - 32045;
-
-  ASSERT (JulianDate >= EPOCH_JULIAN_DATE);
-  EpochDays = JulianDate - EPOCH_JULIAN_DATE;
-
-  EpochSeconds = (EpochDays * SEC_PER_DAY) + ((UINTN)Time->Hour * SEC_PER_HOUR) + (Time->Minute * SEC_PER_MIN) + Time->Second;
-
-  return EpochSeconds;
-}
-
-BOOLEAN
-IsLeapYear (
-  IN EFI_TIME   *Time
-  )
-{
-  if (Time->Year % 4 == 0) {
-    if (Time->Year % 100 == 0) {
-      if (Time->Year % 400 == 0) {
-        return TRUE;
-      } else {
-        return FALSE;
-      }
-    } else {
-      return TRUE;
-    }
-  } else {
-    return FALSE;
-  }
-}
-
-BOOLEAN
-DayValid (
-  IN  EFI_TIME  *Time
-  )
-{
-  STATIC CONST INTN DayOfMonth[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
-
-  if (Time->Day < 1 ||
-      Time->Day > DayOfMonth[Time->Month - 1] ||
-      (Time->Month == 2 && (!IsLeapYear (Time) && Time->Day > 28))
-     ) {
-    return FALSE;
-  }
-
-  return TRUE;
-}
-
-/**
   Returns the current time and date information, and the time-keeping capabilities
   of the hardware platform.
 
@@ -431,7 +310,7 @@ LibSetTime (
        (Time->Year   > 9999) ||
        (Time->Month  < 1   ) ||
        (Time->Month  > 12  ) ||
-       (!DayValid (Time)    ) ||
+       (!IsDayValid (Time) ) ||
        (Time->Hour   > 23  ) ||
        (Time->Minute > 59  ) ||
        (Time->Second > 59  ) ||
diff --git a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.inf b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.inf
index 3a98fc757e..41a4e6d6bd 100644
--- a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.inf
+++ b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.inf
@@ -36,6 +36,7 @@
   PcdLib
   ArmPlatformSysConfigLib
   DxeServicesTableLib
+  EfiTimeBaseLib
   UefiRuntimeLib
 
 [Guids]
diff --git a/ArmVirtPkg/ArmVirt.dsc.inc b/ArmVirtPkg/ArmVirt.dsc.inc
index e74eaf16e7..bc96709d8a 100644
--- a/ArmVirtPkg/ArmVirt.dsc.inc
+++ b/ArmVirtPkg/ArmVirt.dsc.inc
@@ -105,6 +105,7 @@
 
   # ARM PL031 RTC Driver
   RealTimeClockLib|ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.inf
+  EfiTimeBaseLib|EmbeddedPkg/Library/EfiTimeBaseLib/EfiTimeBaseLib.inf
   # ARM PL011 UART Driver
   PL011UartLib|ArmPlatformPkg/Drivers/PL011Uart/PL011Uart.inf
   SerialPortLib|ArmVirtPkg/Library/FdtPL011SerialPortLib/FdtPL011SerialPortLib.inf
-- 
2.11.0