ArmPlatformPkg/PL031RealTimeClockLib: Implement PL031 RTC drive

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11793 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/Include/Drivers/PL031RealTimeClock.h

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+/** @file
+*
+*  Copyright (c) 2011, ARM Limited. All rights reserved.
+*
+*  This program and the accompanying materials
+*  are licensed and made available under the terms and conditions of the BSD License
+*  which accompanies this distribution.  The full text of the license may be found at
+*  http://opensource.org/licenses/bsd-license.php
+*
+*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+
+#ifndef __PL031_REAL_TIME_CLOCK_H__
+#define __PL031_REAL_TIME_CLOCK_H__
+
+#include <Base.h>
+#include <ArmPlatform.h>
+
+// PL031 Registers
+#define PL031_RTC_DR_DATA_REGISTER                      (PL031_RTC_BASE + 0x000)
+#define PL031_RTC_MR_MATCH_REGISTER                     (PL031_RTC_BASE + 0x004)
+#define PL031_RTC_LR_LOAD_REGISTER                      (PL031_RTC_BASE + 0x008)
+#define PL031_RTC_CR_CONTROL_REGISTER                   (PL031_RTC_BASE + 0x00C)
+#define PL031_RTC_IMSC_IRQ_MASK_SET_CLEAR_REGISTER      (PL031_RTC_BASE + 0x010)
+#define PL031_RTC_RIS_RAW_IRQ_STATUS_REGISTER           (PL031_RTC_BASE + 0x014)
+#define PL031_RTC_MIS_MASKED_IRQ_STATUS_REGISTER        (PL031_RTC_BASE + 0x018)
+#define PL031_RTC_ICR_IRQ_CLEAR_REGISTER                (PL031_RTC_BASE + 0x01C)
+#define PL031_RTC_PERIPH_ID0                            (PL031_RTC_BASE + 0xFE0)
+#define PL031_RTC_PERIPH_ID1                            (PL031_RTC_BASE + 0xFE4)
+#define PL031_RTC_PERIPH_ID2                            (PL031_RTC_BASE + 0xFE8)
+#define PL031_RTC_PERIPH_ID3                            (PL031_RTC_BASE + 0xFEC)
+#define PL031_RTC_PCELL_ID0                             (PL031_RTC_BASE + 0xFF0)
+#define PL031_RTC_PCELL_ID1                             (PL031_RTC_BASE + 0xFF4)
+#define PL031_RTC_PCELL_ID2                             (PL031_RTC_BASE + 0xFF8)
+#define PL031_RTC_PCELL_ID3                             (PL031_RTC_BASE + 0xFFC)
+
+// PL031 Values
+#define PL031_RTC_ENABLED                               0x00000001
+#define PL031_SET_IRQ_MASK                              0x00000001
+#define PL031_IRQ_TRIGGERED                             0x00000001
+#define PL031_CLEAR_IRQ                                 0x00000001
+
+#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