Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <p...@akeo.ie>
---
Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.c
| 221 ++++++++++++++++++++
Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf
| 43 ++++
2 files changed, 264 insertions(+)
diff --git
a/Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.c
b/Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.c
new file mode 100644
index 000000000000..dea621ff03ef
--- /dev/null
+++
b/Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.c
@@ -0,0 +1,221 @@
+/** @file
+ *
+ * Implement dummy EFI RealTimeClock runtime services.
+ *
+ * Copyright (c) 2018, Andrei Warkentin <andrey.warken...@gmail.com>
+ * Copyright (c) Microsoft Corporation. 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 <PiDxe.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/RealTimeClockLib.h>
+#include <Library/TimerLib.h>
+#include <Library/TimeBaseLib.h>
+#include <Library/UefiRuntimeLib.h>
+#include <Library/ArmGenericTimerCounterLib.h>
+
+/**
+ Returns the current time and date information, and the time-keeping
capabilities
+ of the virtual RTC.
+
+ For simplicity, this LibGetTime does not report Years/Months, instead it
will only report current
+ Day, Hours, Minutes and Seconds starting from the begining of CPU up-time.
Otherwise, a more
+ complex logic will be required to account for leap years and days/month
differences.
+
+ @param Time A pointer to storage to receive a snapshot of
the current time.
+ @param Capabilities An optional pointer to a buffer to receive
the real time clock
+ device's capabilities.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_INVALID_PARAMETER Time is NULL.
+ @retval EFI_DEVICE_ERROR The time could not be retrieved due to
hardware error.
+
+**/
+EFI_STATUS
+EFIAPI
+LibGetTime (
+ OUT EFI_TIME *Time,
+ OUT EFI_TIME_CAPABILITIES *Capabilities
+ )
+{
+ UINTN DataSize;
+ UINT64 Counter;
+ EFI_STATUS Status;
+ UINTN ElapsedSeconds;
+ UINT32 Remainder;
+ UINT32 Freq = ArmGenericTimerGetTimerFreq ();
+
+ if (Time == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Depend on ARM generic timer to report date/time relative to the
+ // start of CPU timer counting where date and time will always
+ // be relative to the date/time 1/1/1900 00H:00M:00S
+ //
+
+ ASSERT (Freq != 0);
+ if (Freq == 0) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ if (Capabilities) {
+ Capabilities->Accuracy = 0;
+ Capabilities->Resolution = Freq;
+ Capabilities->SetsToZero = FALSE;
+ }
+
+ DataSize = sizeof (UINTN);
+ ElapsedSeconds = 0;
+ Status = EfiGetVariable (L"RtcEpochSeconds",
+ &gEfiCallerIdGuid,
+ NULL,
+ &DataSize,
+ &ElapsedSeconds);
+ if (EFI_ERROR (Status)) {
+ ElapsedSeconds = PcdGet64 (PcdBootEpochSeconds);
+ }
+ Counter = GetPerformanceCounter ();
+ ElapsedSeconds += DivU64x32Remainder (Counter, Freq, &Remainder);
+ EpochToEfiTime (ElapsedSeconds, Time);
+
+ //
+ // Frequency < 0x100000000, so Remainder < 0x100000000, then (Remainder *
1,000,000,000)
+ // will not overflow 64-bit.
+ //
+ Time->Nanosecond = DivU64x32 (MultU64x64 ((UINT64)Remainder, 1000000000U),
Freq);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Sets the current local time and date information.
+
+ @param Time A pointer to the current time.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_INVALID_PARAMETER A time field is out of range.
+ @retval EFI_DEVICE_ERROR The time could not be set due due to hardware
error.
+
+**/
+EFI_STATUS
+EFIAPI
+LibSetTime (
+ IN EFI_TIME *Time
+ )
+{
+ UINTN Epoch;
+
+ if (!IsTimeValid (Time)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Epoch = EfiTimeToEpoch (Time);
+ return EfiSetVariable (L"RtcEpochSeconds", &gEfiCallerIdGuid,
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS |
+ EFI_VARIABLE_NON_VOLATILE,
+ sizeof (Epoch),
+ &Epoch);
+}
+
+
+/**
+ Returns the current wakeup alarm clock setting.
+
+ @param Enabled Indicates if the alarm is currently enabled
or disabled.
+ @param Pending Indicates if the alarm signal is pending and
requires acknowledgement.
+ @param Time The current alarm setting.
+
+ @retval EFI_SUCCESS The alarm settings were returned.
+ @retval EFI_INVALID_PARAMETER Any parameter is NULL.
+ @retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to
a hardware error.
+
+**/
+EFI_STATUS
+EFIAPI
+LibGetWakeupTime (
+ OUT BOOLEAN *Enabled,
+ OUT BOOLEAN *Pending,
+ OUT EFI_TIME *Time
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+
+/**
+ Sets the system wakeup alarm clock time.
+
+ @param Enabled Enable or disable the wakeup alarm.
+ @param Time If Enable is TRUE, the time to set the wakeup
alarm for.
+
+ @retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was
enabled. If
+ Enable is FALSE, then the wakeup alarm was disabled.
+ @retval EFI_INVALID_PARAMETER A time field is out of range.
+ @retval EFI_DEVICE_ERROR The wakeup time could not be set due to a
hardware error.
+ @retval EFI_UNSUPPORTED A wakeup timer is not supported on this
platform.
+
+**/
+EFI_STATUS
+EFIAPI
+LibSetWakeupTime (
+ IN BOOLEAN Enabled,
+ OUT EFI_TIME *Time
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+
+/**
+ This is the declaration of an EFI image entry point. This can be the entry
point to an application
+ written to this specification, an EFI boot service driver, or an EFI
runtime driver.
+
+ @param ImageHandle Handle that identifies the loaded image.
+ @param SystemTable System Table for this image.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+LibRtcInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Fixup internal data so that EFI can be call in virtual mode.
+ Call the passed in Child Notify event and convert any pointers in
+ lib to virtual mode.
+
+ @param[in] Event The Event that is being processed
+ @param[in] Context Event Context
+**/
+VOID
+EFIAPI
+LibRtcVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ return;
+}
diff --git
a/Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf
b/Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf
new file mode 100644
index 000000000000..5c39e4df4c34
--- /dev/null
+++
b/Platform/Raspberry/Pi3/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf
@@ -0,0 +1,43 @@
+#/** @file
+#
+# Implement dummy EFI RealTimeClock runtime services.
+#
+# Copyright (c) 2018, Andrei Warkentin <andrey.warken...@gmail.com>
+# Copyright (c) Microsoft Corporation. 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 = 0x0001001A
+ BASE_NAME = VirtualRealTimeClockLib
+ FILE_GUID = 1E27D461-78F3-4F7D-B1C2-F72384F13A6E
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = RealTimeClockLib
+
+[Sources.common]
+ VirtualRealTimeClockLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ Platform/Raspberry/Pi3/RPi3.dec
+
+[LibraryClasses]
+ IoLib
+ DebugLib
+ TimerLib
+ TimeBaseLib
+ UefiRuntimeLib
+
+[Pcd]
+ gRaspberryPiTokenSpaceGuid.PcdBootEpochSeconds
--
2.17.0.windows.1
