From 259ea52b19b027f2998ee700a9883be9c8f69f61 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 10 Sep 2014 18:49:43 +0000 Subject: ArmPlatformPkg/PL031RealTimeClockLib: use virtual address of runtime services This library accesses SystemTable->RuntimeServices at runtime, which means it should take care to use its updated value after SetVirtualAddressMap () is called. Replace references to gRT with mRT, which we initialize to gRT and update to its virtual value on a virtual address change event. Contributed-under: TianoCore Contribution Agreement 1.0 Reviewed-by: Laszlo Ersek Signed-off-by: Ard Biesheuvel Reviewed-by: Olivier Martin git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16091 6f19259b-4bc3-4df7-8a09-765794883524 --- .../PL031RealTimeClockLib/PL031RealTimeClockLib.c | 28 ++++++++++++---------- 1 file changed, 15 insertions(+), 13 deletions(-) (limited to 'ArmPlatformPkg') diff --git a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c index b43d8dc4ba..3e4147c58b 100644 --- a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c +++ b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c @@ -1,8 +1,6 @@ /** @file Implement EFI RealTimeClock runtime services via RTC Lib. - Currently this driver does not support runtime virtual calling. - Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.
Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.
@@ -40,11 +38,12 @@ #include -STATIC CONST CHAR16 mTimeZoneVariableName[] = L"PL031RtcTimeZone"; -STATIC CONST CHAR16 mDaylightVariableName[] = L"PL031RtcDaylight"; -STATIC BOOLEAN mPL031Initialized = FALSE; -STATIC EFI_EVENT mRtcVirtualAddrChangeEvent; -STATIC UINTN mPL031RtcBase; +STATIC CONST CHAR16 mTimeZoneVariableName[] = L"PL031RtcTimeZone"; +STATIC CONST CHAR16 mDaylightVariableName[] = L"PL031RtcDaylight"; +STATIC BOOLEAN mPL031Initialized = FALSE; +STATIC EFI_EVENT mRtcVirtualAddrChangeEvent; +STATIC UINTN mPL031RtcBase; +STATIC EFI_RUNTIME_SERVICES *mRT; EFI_STATUS IdentifyPL031 ( @@ -294,7 +293,7 @@ LibGetTime ( // Get the current time zone information from non-volatile storage Size = sizeof (TimeZone); - Status = gRT->GetVariable ( + Status = mRT->GetVariable ( (CHAR16 *)mTimeZoneVariableName, &gEfiCallerIdGuid, NULL, @@ -312,7 +311,7 @@ LibGetTime ( // The time zone variable does not exist in non-volatile storage, so create it. Time->TimeZone = EFI_UNSPECIFIED_TIMEZONE; // Store it - Status = gRT->SetVariable ( + Status = mRT->SetVariable ( (CHAR16 *)mTimeZoneVariableName, &gEfiCallerIdGuid, EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, @@ -346,7 +345,7 @@ LibGetTime ( // Get the current daylight information from non-volatile storage Size = sizeof (Daylight); - Status = gRT->GetVariable ( + Status = mRT->GetVariable ( (CHAR16 *)mDaylightVariableName, &gEfiCallerIdGuid, NULL, @@ -364,7 +363,7 @@ LibGetTime ( // The daylight variable does not exist in non-volatile storage, so create it. Time->Daylight = 0; // Store it - Status = gRT->SetVariable ( + Status = mRT->SetVariable ( (CHAR16 *)mDaylightVariableName, &gEfiCallerIdGuid, EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, @@ -498,7 +497,7 @@ LibSetTime ( // Do this after having set the RTC. // Save the current time zone information into non-volatile storage - Status = gRT->SetVariable ( + Status = mRT->SetVariable ( (CHAR16 *)mTimeZoneVariableName, &gEfiCallerIdGuid, EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, @@ -516,7 +515,7 @@ LibSetTime ( } // Save the current daylight information into non-volatile storage - Status = gRT->SetVariable ( + Status = mRT->SetVariable ( (CHAR16 *)mDaylightVariableName, &gEfiCallerIdGuid, EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS, @@ -609,6 +608,7 @@ LibRtcVirtualNotifyEvent ( // runtime calls will be made in virtual mode. // EfiConvertPointer (0x0, (VOID**)&mPL031RtcBase); + EfiConvertPointer (0x0, (VOID**)&mRT); return; } @@ -656,6 +656,8 @@ LibRtcInitialize ( gRT->GetWakeupTime = LibGetWakeupTime; gRT->SetWakeupTime = LibSetWakeupTime; + mRT = gRT; + // Install the protocol Handle = NULL; Status = gBS->InstallMultipleProtocolInterfaces ( -- cgit v1.2.3