diff options
Diffstat (limited to 'Chipset/SB/PchWrap/WdtApp/Dxe/WdtAppDxe.c')
| -rw-r--r-- | Chipset/SB/PchWrap/WdtApp/Dxe/WdtAppDxe.c | 401 |
1 files changed, 401 insertions, 0 deletions
diff --git a/Chipset/SB/PchWrap/WdtApp/Dxe/WdtAppDxe.c b/Chipset/SB/PchWrap/WdtApp/Dxe/WdtAppDxe.c new file mode 100644 index 0000000..902b521 --- /dev/null +++ b/Chipset/SB/PchWrap/WdtApp/Dxe/WdtAppDxe.c @@ -0,0 +1,401 @@ +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2011, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* + +//************************************************************************* +// $Header: /Alaska/BIN/Chipset/Intel/SouthBridge/LynxPoint/Intel Pch SB Chipset/PchWrap/WdtApp/WdtAppDxe/WdtAppDxe.c 2 5/14/14 1:10p Barretlin $ +// +// $Revision: 2 $ +// +// $Date: 5/14/14 1:10p $ +//************************************************************************* +// Revision History +// ---------------- +// $Log: /Alaska/BIN/Chipset/Intel/SouthBridge/LynxPoint/Intel Pch SB Chipset/PchWrap/WdtApp/WdtAppDxe/WdtAppDxe.c $ +// +// 2 5/14/14 1:10p Barretlin +// [TAG] EIP167028 +// [Category] Improvement +// [Description] Variable attribute improment +// [Files] SB.sd SBDxe.c WdtAppDxe.c +// +// 1 2/08/12 8:34a Yurenlai +// Intel Lynx Point/SB eChipset initially releases. +// +//************************************************************************* +#include <Efi.h> +#include <token.h> +#include <AmiLib.h> +#include <AmiDxeLib.h> +#include <Dxe.h> +#include <PCI.h> +#include <AmiCspLib.h> +#include <WdtAppVariable.h> +#include <Protocol\Wdt\Wdt.h> +#include <Protocol\WdtApp\WdtApp.h> + +#ifdef EFI_DEBUG +#define WDT_TIMEOUT_VALUE 10 // s +#else +#define WDT_TIMEOUT_VALUE 5 // s +#endif + +#define WDT_RELOAD_TIMER 10000000 // in units of 100ns + +EFI_GUID guidLegacyBoot = EFI_EVENT_LEGACY_BOOT_GUID; +EFI_GUID gWdtProtocolGuid = WDT_PROTOCOL_GUID; + +EFI_STATUS +StopFeedingWatchdog ( + IN EFI_EVENT Event, + IN VOID *Context +); + +EFI_STATUS +FeedWatchdog ( + IN EFI_EVENT Event, + IN VOID *Context +); + +EFI_STATUS +InstallWdtSupport ( + VOID +); + +EFI_STATUS +EFIAPI +RequestWdtAfterReboot ( + VOID +); + +EFI_STATUS +EFIAPI +RequestWdtNow ( + VOID +); + +WDT_APP_PROTOCOL mWdtAppProtocol = { + RequestWdtAfterReboot, + RequestWdtNow +}; + +EFI_EVENT mFeedEvent; + +//<AMI_PHDR_START> +//---------------------------------------------------------------------------- +// +// Procedure: WdtAppDxeEntryPoint +// +// Description: Turns on WDT during DXE phase according to requests made by +// OS overclocking application (through WDT status) and BIOS +// modules (through flash variable) +// +// Input: IN EFI_HANDLE ImageHandle, +// IN EFI_SYSTEM_TABLE *SystemTable +// +// Output: EFI_STATUS +// +//---------------------------------------------------------------------------- +//<AMI_PHDR_END> +EFI_STATUS +WdtAppDxeEntryPoint ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + WDT_PROTOCOL *WdtProtocol; + UINTN VariableSize; + UINT32 Attributes; + EFI_GUID WdtPersistentDataGuid = WDT_PERSISTENT_DATA_GUID; + WDT_PERSISTENT_DATA WdtPersistentData; + + InitAmiLib(ImageHandle, SystemTable); + + TRACE ((-1, "(WdtApp) Entry Point to WdtAppDxe\n")); + + Status = pBS->LocateProtocol(&gWdtProtocolGuid, NULL, &WdtProtocol); + if ( EFI_ERROR(Status) ) { + TRACE ((-1, "(WdtApp) Failed to locate Wdt protocol, Status = %r\n",Status)); + return EFI_SUCCESS; + } + + VariableSize = sizeof (WDT_PERSISTENT_DATA); + + Status = pRS->GetVariable ( + L"WdtPersistentData", + &WdtPersistentDataGuid, + &Attributes, + &VariableSize, + &WdtPersistentData + ); + if (EFI_ERROR (Status)) { + WdtPersistentData.Enable = 0; + Attributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS; + } + + if (WdtProtocol->IsWdtRequired() == TRUE || WdtPersistentData.Enable == 1) { + WdtProtocol->ReloadAndStart(WDT_TIMEOUT_VALUE); + InstallWdtSupport(); + } + + WdtPersistentData.Enable = 0; + pRS->SetVariable( + L"WdtPersistentData", + &WdtPersistentDataGuid, + Attributes, + sizeof (WDT_PERSISTENT_DATA), + &WdtPersistentData + ); + + Status = pBS->InstallProtocolInterface ( + &ImageHandle, + &gWdtAppProtocolGuid, + EFI_NATIVE_INTERFACE, + &mWdtAppProtocol + ); + + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + + +//<AMI_PHDR_START> +//---------------------------------------------------------------------------- +// +// Procedure: RequestWdtNow +// +// Description: Allows protocol's clients to request that WDT be turned on and periodically kicked, +// starting from now. +// +// Input: None +// +// Output: EFI_SUCCESS if everything's OK +// +//---------------------------------------------------------------------------- +//<AMI_PHDR_END> +EFI_STATUS +EFIAPI +RequestWdtNow ( + VOID + ) +{ + EFI_STATUS Status; + Status = InstallWdtSupport(); + return Status; +}; + + +//<AMI_PHDR_START> +//---------------------------------------------------------------------------- +// +// Procedure: RequestWdtAfterReboot +// +// Description: Allows protocol's clients to request that WDT be turned on and periodically kicked +// during BIOS execution during next boot. +// +// Input: None +// +// Output: EFI_SUCCESS if everything's OK +// +//---------------------------------------------------------------------------- +//<AMI_PHDR_END> +EFI_STATUS +EFIAPI +RequestWdtAfterReboot ( + VOID + ) +{ + EFI_STATUS Status; + EFI_GUID WdtPersistentDataGuid = WDT_PERSISTENT_DATA_GUID; + WDT_PERSISTENT_DATA WdtPersistentData; + UINT32 Attributes; + UINTN VariableSize; + + VariableSize = sizeof (WDT_PERSISTENT_DATA); + + Status = pRS->GetVariable ( + L"WdtPersistentData", + &WdtPersistentDataGuid, + &Attributes, + &VariableSize, + &WdtPersistentData + ); + if (EFI_ERROR(Status)) Attributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS; + + WdtPersistentData.Enable = 1; + Status = pRS->SetVariable( + L"WdtPersistentData", + &WdtPersistentDataGuid, + Attributes, + sizeof (WDT_PERSISTENT_DATA), + &WdtPersistentData + ); + ASSERT_EFI_ERROR(Status); + + return Status; +} + + +//<AMI_PHDR_START> +//---------------------------------------------------------------------------- +// +// Procedure: InstallWdtSupport +// +// Description: Creates events for FeedWatchdog and StopFeedingWatchdog functions. +// +// Input: None +// +// Output: EFI_SUCCESS if everything's OK +// +//---------------------------------------------------------------------------- +//<AMI_PHDR_END> +EFI_STATUS +InstallWdtSupport ( + VOID + ) +{ + EFI_STATUS Status; + EFI_EVENT BootEvent; + WDT_PROTOCOL* WdtProtocol; + + TRACE ((-1, "(WdtApp) Wdt turned on\n")); + + Status = pBS->LocateProtocol(&gWdtProtocolGuid, NULL, &WdtProtocol); + ASSERT_EFI_ERROR(Status); + Status = WdtProtocol->ReloadAndStart(WDT_TIMEOUT_VALUE); + ASSERT_EFI_ERROR(Status); + + Status = pBS->CreateEvent ( + EFI_EVENT_TIMER | EFI_EVENT_NOTIFY_SIGNAL, + TPL_NOTIFY, + FeedWatchdog, + NULL, + &mFeedEvent + ); + ASSERT_EFI_ERROR (Status); + Status = pBS->SetTimer ( + mFeedEvent, + TimerPeriodic, + WDT_RELOAD_TIMER + ); + ASSERT_EFI_ERROR (Status); + + Status = pBS->CreateEvent ( + EVT_SIGNAL_EXIT_BOOT_SERVICES, + TPL_CALLBACK, + StopFeedingWatchdog, + NULL, + &BootEvent + ); + + ASSERT_EFI_ERROR (Status); + + Status = pBS->CreateEventEx( + EVT_NOTIFY_SIGNAL, + TPL_CALLBACK, + StopFeedingWatchdog, + NULL, + &guidLegacyBoot, + &BootEvent + ); + + ASSERT_EFI_ERROR (Status); + + return Status; +} + + +//<AMI_PHDR_START> +//---------------------------------------------------------------------------- +// +// Procedure: FeedWatchdog +// +// Description: Prevents WDT timeout by restarting it. +// +// Input: None +// +// Output: Nothing +// +//---------------------------------------------------------------------------- +//<AMI_PHDR_END> +EFI_STATUS +FeedWatchdog ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + EFI_STATUS Status; + WDT_PROTOCOL* WdtProtocol; + + Status = pBS->LocateProtocol(&gWdtProtocolGuid, NULL, &WdtProtocol); + if ( EFI_ERROR(Status) ) { + TRACE ((-1, "(WdtApp) Failed to locate Wdt protocol, Status = %r\n",Status)); + Status = pBS->SetTimer (mFeedEvent, TimerCancel, 0); + ASSERT_EFI_ERROR(Status); + Status = pBS->CloseEvent (mFeedEvent); + ASSERT_EFI_ERROR(Status); + return Status; + } + Status = WdtProtocol->ReloadAndStart(WDT_TIMEOUT_VALUE); + return Status; +} + + +//<AMI_PHDR_START> +//---------------------------------------------------------------------------- +// +// Procedure: StopFeedingWatchdog +// +// Description: Stops timer and event that kept on feeding watchdog. +// +// Input: None +// +// Output: Nothing +// +//---------------------------------------------------------------------------- +//<AMI_PHDR_END> +EFI_STATUS +StopFeedingWatchdog ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + EFI_STATUS Status; + WDT_PROTOCOL* WdtProtocol; + + TRACE ((-1, "(WdtApp) Stop feeding WDT\n")); + Status = pBS->SetTimer (mFeedEvent, TimerCancel, 0); + ASSERT_EFI_ERROR(Status); + Status = pBS->CloseEvent (mFeedEvent); + ASSERT_EFI_ERROR(Status); + Status = pBS->LocateProtocol(&gWdtProtocolGuid, NULL, &WdtProtocol); + if ( !EFI_ERROR(Status) ) { + WdtProtocol->Disable(); + } + return EFI_SUCCESS; +} +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2011, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* |