From 33e7c2abf4852c98d13072102277170e198c5220 Mon Sep 17 00:00:00 2001 From: oliviermartin Date: Sat, 11 Jun 2011 11:22:05 +0000 Subject: [PATCH] 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 --- .../ArmVExpressPkg/ArmVExpress-CTA9x4.dsc | 1 + .../ArmVExpressPkg/ArmVExpress-CTA9x4.fdf | 1 + .../Include/Platform/CTA9x4/ArmPlatform.h | 7 + .../Drivers/SP805WatchdogDxe/SP805Watchdog.c | 450 ++++++++++++++++++ .../SP805WatchdogDxe/SP805WatchdogDxe.inf | 50 ++ .../Include/Drivers/SP805Watchdog.h | 92 ++++ 6 files changed, 601 insertions(+) create mode 100644 ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805Watchdog.c create mode 100644 ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805WatchdogDxe.inf create mode 100644 ArmPlatformPkg/Include/Drivers/SP805Watchdog.h diff --git a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc index 08c6c62f93..97e315880e 100644 --- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc +++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc @@ -490,6 +490,7 @@ ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.inf ArmPlatformPkg/Drivers/SP804TimerDxe/SP804TimerDxe.inf ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/PL111LcdGraphicsOutputDxe.inf + ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805WatchdogDxe.inf # # Semi-hosting filesystem diff --git a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.fdf b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.fdf index e1571e0a18..9462c8d0a1 100644 --- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.fdf +++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.fdf @@ -162,6 +162,7 @@ READ_LOCK_STATUS = TRUE INF ArmPlatformPkg/Drivers/SP804TimerDxe/SP804TimerDxe.inf INF ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.inf INF ArmPlatformPkg/Drivers/LcdGraphicsOutputDxe/PL111LcdGraphicsOutputDxe.inf + INF ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805WatchdogDxe.inf # # Semi-hosting filesystem diff --git a/ArmPlatformPkg/ArmVExpressPkg/Include/Platform/CTA9x4/ArmPlatform.h b/ArmPlatformPkg/ArmVExpressPkg/Include/Platform/CTA9x4/ArmPlatform.h index 4e8c02d3fc..171b0420d5 100644 --- a/ArmPlatformPkg/ArmVExpressPkg/Include/Platform/CTA9x4/ArmPlatform.h +++ b/ArmPlatformPkg/ArmVExpressPkg/Include/Platform/CTA9x4/ArmPlatform.h @@ -106,6 +106,10 @@ //#define PL111_CLCD_BASE PL111_CLCD_MOTHERBOARD_BASE #define PL111_CLCD_BASE PL111_CLCD_CORE_TILE_BASE +// Specify which Watchdog to use +#define SP805_WDOG_BASE SP805_WDOG_MOTHERBOARD_BASE +//#define SP805_WDOG_BASE SP805_WDOG_CORE_TILE_BASE + /*********************************************************************************** Peripherals' misc settings ************************************************************************************/ @@ -129,6 +133,9 @@ // PL031 RTC - Other settings #define PL031_PPM_ACCURACY 300000000 +// SP805 Watchdog - Other settings +#define SP805_CLOCK_FREQUENCY 32000 +#define SP805_MAX_TICKS 0xFFFFFFFF // PL111 Lcd #define PL111_CLCD_CORE_TILE_VIDEO_MODE_OSC_ID 1 diff --git a/ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805Watchdog.c b/ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805Watchdog.c new file mode 100644 index 0000000000..0eb459303f --- /dev/null +++ b/ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805Watchdog.c @@ -0,0 +1,450 @@ +/** @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. +* +**/ + + +#include + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +/** + Interface structure for the Watchdog Architectural Protocol. + + @par Protocol Description: + This protocol provides a service to set the amount of time to wait + before firing the watchdog timer, and it also provides a service to + register a handler that is invoked when the watchdog timer fires. + + @par When the watchdog timer fires, control will be passed to a handler + if one has been registered. If no handler has been registered, + or the registered handler returns, then the system will be + reset by calling the Runtime Service ResetSystem(). + + @param RegisterHandler + Registers a handler that will be called each time the + watchdogtimer interrupt fires. TimerPeriod defines the minimum + time between timer interrupts, so TimerPeriod will also + be the minimum time between calls to the registered + handler. + NOTE: If the watchdog resets the system in hardware, then + this function will not have any chance of executing. + + @param SetTimerPeriod + Sets the period of the timer interrupt in 100 nS units. + This function is optional, and may return EFI_UNSUPPORTED. + If this function is supported, then the timer period will + be rounded up to the nearest supported timer period. + + @param GetTimerPeriod + Retrieves the period of the timer interrupt in 100 nS units. + +**/ +EFI_WATCHDOG_TIMER_ARCH_PROTOCOL gWatchdogTimer = { + (EFI_WATCHDOG_TIMER_REGISTER_HANDLER) SP805RegisterHandler, + (EFI_WATCHDOG_TIMER_SET_TIMER_PERIOD) SP805SetTimerPeriod, + (EFI_WATCHDOG_TIMER_GET_TIMER_PERIOD) SP805GetTimerPeriod +}; + +EFI_EVENT EfiExitBootServicesEvent = (EFI_EVENT)NULL; + +BOOLEAN mSP805Initialized = FALSE; + +EFI_STATUS +SP805Identify ( + VOID + ) +{ + // Check if this is a PrimeCell Peripheral + if( ( MmioRead8( SP805_WDOG_PCELL_ID0 ) != 0x0D ) + || ( MmioRead8( SP805_WDOG_PCELL_ID1 ) != 0xF0 ) + || ( MmioRead8( SP805_WDOG_PCELL_ID2 ) != 0x05 ) + || ( MmioRead8( SP805_WDOG_PCELL_ID3 ) != 0xB1 ) ) { + return EFI_NOT_FOUND; + } + + // Check if this PrimeCell Peripheral is the SP805 Watchdog Timer + if( ( MmioRead8( SP805_WDOG_PERIPH_ID0 ) != 0x05 ) + || ( MmioRead8( SP805_WDOG_PERIPH_ID1 ) != 0x18 ) + || (( MmioRead8( SP805_WDOG_PERIPH_ID2 ) & 0x0000000F) != 0x04 ) + || ( MmioRead8( SP805_WDOG_PERIPH_ID3 ) != 0x00 ) ) { + return EFI_NOT_FOUND; + } + + return EFI_SUCCESS; +} + +/** + Make sure the SP805 registers are unlocked for writing. + + Note: The SP805 Watchdog Timer supports locking of its registers, + i.e. it inhibits all writes to avoid rogue software accidentally + corrupting their contents. +**/ +inline +VOID +SP805Unlock ( + VOID + ) +{ + if( MmioRead32(SP805_WDOG_LOCK_REG) == SP805_WDOG_LOCK_IS_LOCKED ) { + MmioWrite32(SP805_WDOG_LOCK_REG, SP805_WDOG_SPECIAL_UNLOCK_CODE); + } +} + +/** + Make sure the SP805 registers are locked and can not be overwritten. + + Note: The SP805 Watchdog Timer supports locking of its registers, + i.e. it inhibits all writes to avoid rogue software accidentally + corrupting their contents. +**/ +inline +VOID +SP805Lock ( + VOID + ) +{ + if( MmioRead32(SP805_WDOG_LOCK_REG) == SP805_WDOG_LOCK_IS_UNLOCKED ) { + // To lock it, just write in any number (except the special unlock code). + MmioWrite32(SP805_WDOG_LOCK_REG, SP805_WDOG_LOCK_IS_LOCKED); + } +} + +/** + Stop the SP805 watchdog timer from counting down by disabling interrupts. +**/ +inline +VOID +SP805Stop ( + VOID + ) +{ + // Disable interrupts + if ( (MmioRead32(SP805_WDOG_CONTROL_REG) & SP805_WDOG_CTRL_INTEN) != 0 ) { + MmioAnd32(SP805_WDOG_CONTROL_REG, ~SP805_WDOG_CTRL_INTEN); + } +} + +/** + Starts the SP805 counting down by enabling interrupts. + The count down will start from the value stored in the Load register, + not from the value where it was previously stopped. +**/ +inline +VOID +SP805Start ( + VOID + ) +{ + // Enable interrupts + if ( (MmioRead32(SP805_WDOG_CONTROL_REG) & SP805_WDOG_CTRL_INTEN) == 0 ) { + MmioOr32(SP805_WDOG_CONTROL_REG, SP805_WDOG_CTRL_INTEN); + } +} + +/** + On exiting boot services we must make sure the SP805 Watchdog Timer + is stopped. +**/ +VOID +EFIAPI +ExitBootServicesEvent ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + SP805Unlock(); + SP805Stop(); + SP805Lock(); +} + +/** + This function registers the handler NotifyFunction so it is called every time + the watchdog timer expires. It also passes the amount of time since the last + handler call to the NotifyFunction. + If NotifyFunction is not NULL and a handler is not already registered, + then the new handler is registered and EFI_SUCCESS is returned. + If NotifyFunction is NULL, and a handler is already registered, + then that handler is unregistered. + If an attempt is made to register a handler when a handler is already registered, + then EFI_ALREADY_STARTED is returned. + If an attempt is made to unregister a handler when a handler is not registered, + then EFI_INVALID_PARAMETER is returned. + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param NotifyFunction The function to call when a timer interrupt fires. This + function executes at TPL_HIGH_LEVEL. The DXE Core will + register a handler for the timer interrupt, so it can know + how much time has passed. This information is used to + signal timer based events. NULL will unregister the handler. + + @retval EFI_SUCCESS The watchdog timer handler was registered. + @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already + registered. + @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not + previously registered. + +**/ +EFI_STATUS +EFIAPI +SP805RegisterHandler ( + IN CONST EFI_WATCHDOG_TIMER_ARCH_PROTOCOL *This, + IN EFI_WATCHDOG_TIMER_NOTIFY NotifyFunction + ) +{ + // ERROR: This function is not supported. + // The hardware watchdog will reset the board + return EFI_INVALID_PARAMETER; +} + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +SP805SetTimerPeriod ( + IN CONST EFI_WATCHDOG_TIMER_ARCH_PROTOCOL *This, + IN UINT64 TimerPeriod // In 100ns units + ) +{ + EFI_STATUS Status = EFI_SUCCESS; + UINT64 Ticks64bit; + + // Initialize the hardware if not already done + if( !mSP805Initialized ) { + Status = SP805Initialize(); + if (EFI_ERROR(Status)) { + goto EXIT; + } + } + + SP805Unlock(); + + if( TimerPeriod == 0 ) { + // This is a watchdog stop request + SP805Stop(); + goto EXIT; + } else { + // Calculate the Watchdog ticks required for a delay of (TimerTicks * 100) nanoseconds + // The SP805 will count down to ZERO once, generate an interrupt and + // then it will again reload the initial value and start again. + // On the second time when it reaches ZERO, it will actually reset the board. + // Therefore, we need to load half the required delay. + // + // WatchdogTicks = ((TimerPeriod * 100 * SP805_CLOCK_FREQUENCY) / 1GHz) / 2 ; + // + // i.e.: + // + // WatchdogTicks = (TimerPeriod * SP805_CLOCK_FREQUENCY) / 20 MHz ; + + Ticks64bit = DivU64x32( MultU64x32( TimerPeriod, SP805_CLOCK_FREQUENCY ), 20000000 ); + + // The registers in the SP805 are only 32 bits + if( Ticks64bit > SP805_MAX_TICKS ) { + // We could load the watchdog with the maximum supported value but + // if a smaller value was requested, this could have the watchdog + // triggering before it was intended. + // Better generate an error to let the caller know. + Status = EFI_DEVICE_ERROR; + goto EXIT; + } + + // Update the watchdog with a 32-bit value. + MmioWrite32(SP805_WDOG_LOAD_REG, (UINT32)Ticks64bit); + + // Start the watchdog + SP805Start(); + } + + EXIT: + // Ensure the watchdog is locked before exiting. + SP805Lock(); + return Status; +} + +/** + This function retrieves the period of timer interrupts in 100 ns units, + returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod + is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is + returned, then the timer is currently disabled. + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If + 0 is returned, then the timer is currently disabled. + + + @retval EFI_SUCCESS The timer period was returned in TimerPeriod. + @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. + +**/ +EFI_STATUS +EFIAPI +SP805GetTimerPeriod ( + IN CONST EFI_WATCHDOG_TIMER_ARCH_PROTOCOL *This, + OUT UINT64 *TimerPeriod + ) +{ + EFI_STATUS Status = EFI_SUCCESS; + UINT64 ReturnValue; + + if (TimerPeriod == NULL) { + return EFI_INVALID_PARAMETER; + } + + // Initialize the hardware if not already done + if( !mSP805Initialized ) { + Status = SP805Initialize(); + if (EFI_ERROR(Status)) { + goto EXIT; + } + } + + // Check if the watchdog is stopped + if ( (MmioRead32(SP805_WDOG_CONTROL_REG) & SP805_WDOG_CTRL_INTEN) == 0 ) { + // It is stopped, so return zero. + ReturnValue = 0; + } else { + // Convert the Watchdog ticks into TimerPeriod + // Ensure 64bit arithmetic throughout because the Watchdog ticks may already + // be at the maximum 32 bit value and we still need to multiply that by 600. + ReturnValue = MultU64x32( MmioRead32(SP805_WDOG_LOAD_REG), 600 ); + } + + *TimerPeriod = ReturnValue; + + EXIT: + return Status; +} + +/** + Initialize the state information for the Watchdog Timer Architectural Protocol. + + @param ImageHandle of the loaded driver + @param SystemTable Pointer to the System Table + + @retval EFI_SUCCESS Protocol registered + @retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure + @retval EFI_DEVICE_ERROR Hardware problems + +**/ +EFI_STATUS +SP805Initialize ( + VOID + ) +{ + EFI_STATUS Status; + + // Check if the SP805 hardware watchdog module exists on board + Status = SP805Identify(); + if (EFI_ERROR( Status )) { + Status = EFI_DEVICE_ERROR; + goto EXIT; + } + + // Unlock access to the SP805 registers + SP805Unlock(); + + // Stop the watchdog from triggering unexpectedly + SP805Stop(); + + // Set the watchdog to reset the board when triggered + if ( (MmioRead32(SP805_WDOG_CONTROL_REG) & SP805_WDOG_CTRL_RESEN) == 0 ) { + MmioOr32(SP805_WDOG_CONTROL_REG, SP805_WDOG_CTRL_RESEN); + } + + // Prohibit any rogue access to SP805 registers + SP805Lock(); + + mSP805Initialized = TRUE; + + EXIT: + return Status; +} + +EFI_STATUS +EFIAPI +SP805InstallProtocol ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + EFI_HANDLE Handle; + + // + // Make sure the Watchdog Timer Architectural Protocol has not been installed in the system yet. + // This will avoid conflicts with the universal watchdog + // + ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiWatchdogTimerArchProtocolGuid); + + // Register for an ExitBootServicesEvent + Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_NOTIFY, ExitBootServicesEvent, NULL, &EfiExitBootServicesEvent); + if (EFI_ERROR(Status)) { + Status = EFI_OUT_OF_RESOURCES; + goto EXIT; + } + + // Install the Timer Architectural Protocol onto a new handle + Handle = NULL; + Status = gBS->InstallMultipleProtocolInterfaces( + &Handle, + &gEfiWatchdogTimerArchProtocolGuid, &gWatchdogTimer, + NULL + ); + if (EFI_ERROR(Status)) { + Status = EFI_OUT_OF_RESOURCES; + goto EXIT; + } + + EXIT: + if(EFI_ERROR(Status)) { + // The watchdog failed to initialize + ASSERT(FALSE); + } + return Status; +} diff --git a/ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805WatchdogDxe.inf b/ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805WatchdogDxe.inf new file mode 100644 index 0000000000..b77320120c --- /dev/null +++ b/ArmPlatformPkg/Drivers/SP805WatchdogDxe/SP805WatchdogDxe.inf @@ -0,0 +1,50 @@ +/** @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. +* +**/ + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = SP805WatchdogDxe + FILE_GUID = ebd705fb-fa92-46a7-b32b-7f566d944614 + MODULE_TYPE = DXE_DRIVER + VERSION_STRING = 1.0 + + ENTRY_POINT = SP805InstallProtocol + +[Sources.common] + SP805Watchdog.c + +[Packages] + MdePkg/MdePkg.dec + EmbeddedPkg/EmbeddedPkg.dec + ArmPkg/ArmPkg.dec + ArmPlatformPkg/ArmPlatformPkg.dec + +[LibraryClasses] + BaseLib + UefiRuntimeServicesTableLib + UefiLib + UefiBootServicesTableLib + BaseMemoryLib + DebugLib + UefiDriverEntryPoint + IoLib + +[Guids] + +[Protocols] + gEfiWatchdogTimerArchProtocolGuid + + +[Depex] +TRUE diff --git a/ArmPlatformPkg/Include/Drivers/SP805Watchdog.h b/ArmPlatformPkg/Include/Drivers/SP805Watchdog.h new file mode 100644 index 0000000000..10600a1553 --- /dev/null +++ b/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 +#include + +// 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__