ArmPlatformPkg: Add SP805 Watchdog support

- Create SP805 Watchdog timer
- Enable this new driver on VExpress Cortex-A9x4 Core tile



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11794 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/Include/Drivers/SP805Watchdog.h

@@ -0,0 +1,92 @@
+/** @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 __SP805_WATCHDOG_H__
+#define __SP805_WATCHDOG_H__
+
+#include <Base.h>
+#include <ArmPlatform.h>
+
+// SP805 Watchdog Registers
+#define SP805_WDOG_LOAD_REG             (SP805_WDOG_BASE + 0x000)
+#define SP805_WDOG_CURRENT_REG          (SP805_WDOG_BASE + 0x004)
+#define SP805_WDOG_CONTROL_REG          (SP805_WDOG_BASE + 0x008)
+#define SP805_WDOG_INT_CLR_REG          (SP805_WDOG_BASE + 0x00C)
+#define SP805_WDOG_RAW_INT_STS_REG      (SP805_WDOG_BASE + 0x010)
+#define SP805_WDOG_MSK_INT_STS_REG      (SP805_WDOG_BASE + 0x014)
+#define SP805_WDOG_LOCK_REG             (SP805_WDOG_BASE + 0xC00)
+
+#define SP805_WDOG_PERIPH_ID0           (SP805_WDOG_BASE + 0xFE0)
+#define SP805_WDOG_PERIPH_ID1           (SP805_WDOG_BASE + 0xFE4)
+#define SP805_WDOG_PERIPH_ID2           (SP805_WDOG_BASE + 0xFE8)
+#define SP805_WDOG_PERIPH_ID3           (SP805_WDOG_BASE + 0xFEC)
+
+#define SP805_WDOG_PCELL_ID0            (SP805_WDOG_BASE + 0xFF0)
+#define SP805_WDOG_PCELL_ID1            (SP805_WDOG_BASE + 0xFF4)
+#define SP805_WDOG_PCELL_ID2            (SP805_WDOG_BASE + 0xFF8)
+#define SP805_WDOG_PCELL_ID3            (SP805_WDOG_BASE + 0xFFC)
+
+// Timer control register bit definitions
+#define SP805_WDOG_CTRL_INTEN           BIT0
+#define SP805_WDOG_CTRL_RESEN           BIT1
+#define SP805_WDOG_RAW_INT_STS_WDOGRIS  BIT0
+#define SP805_WDOG_MSK_INT_STS_WDOGMIS  BIT0
+
+#define SP805_WDOG_LOCK_IS_UNLOCKED     0x00000000
+#define SP805_WDOG_LOCK_IS_LOCKED       0x00000001
+#define SP805_WDOG_SPECIAL_UNLOCK_CODE  0x1ACCE551
+
+VOID
+EFIAPI
+ExitBootServicesEvent (
+  IN EFI_EVENT  Event,
+  IN VOID       *Context
+);
+
+EFI_STATUS
+EFIAPI
+SP805SetTimerPeriod (
+  IN CONST EFI_WATCHDOG_TIMER_ARCH_PROTOCOL   *This,
+  IN UINT64                                   TimerPeriod   // In 100ns units
+);
+
+EFI_STATUS
+EFIAPI
+SP805GetTimerPeriod (
+  IN CONST EFI_WATCHDOG_TIMER_ARCH_PROTOCOL   *This,
+  OUT UINT64                                  *TimerPeriod
+);
+
+EFI_STATUS
+EFIAPI
+SP805RegisterHandler (
+  IN CONST EFI_WATCHDOG_TIMER_ARCH_PROTOCOL   *This,
+  IN EFI_WATCHDOG_TIMER_NOTIFY                NotifyFunction
+);
+
+EFI_STATUS
+SP805Initialize (
+  VOID
+);
+
+EFI_STATUS
+EFIAPI
+SP805InstallProtocol (
+  IN EFI_HANDLE         ImageHandle,
+  IN EFI_SYSTEM_TABLE   *SystemTable
+);
+
+
+#endif  // __SP805_WATCHDOG_H__