diff options
Diffstat (limited to 'EmbeddedPkg/RealTimeClockRuntimeDxe')
| -rw-r--r-- | EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClock.c | 171 | ||||
| -rw-r--r-- | EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf | 11 |
2 files changed, 171 insertions, 11 deletions
diff --git a/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClock.c b/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClock.c index f1e067c0b5..8323a4b4b8 100644 --- a/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClock.c +++ b/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClock.c @@ -1,10 +1,8 @@ /** @file
Implement EFI RealTimeClock runtime services via RTC Lib.
- Currently this driver does not support runtime virtual calling.
-
-
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+ Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -17,14 +15,116 @@ **/
#include <PiDxe.h>
+#include <Library/DebugLib.h>
+#include <Library/RealTimeClockLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
-#include <Library/RealTimeClockLib.h>
+#include <Library/UefiRuntimeLib.h>
#include <Protocol/RealTimeClock.h>
EFI_HANDLE mHandle = NULL;
+//
+// These values can be set by SetTime () and need to be returned by GetTime ()
+// but cannot usually be kept by the RTC hardware, so we store them in a UEFI
+// variable instead.
+//
+typedef struct {
+ INT16 TimeZone;
+ UINT8 Daylight;
+} NON_VOLATILE_TIME_SETTINGS;
+
+STATIC CONST CHAR16 mTimeSettingsVariableName[] = L"RtcTimeSettings";
+STATIC NON_VOLATILE_TIME_SETTINGS mTimeSettings;
+
+STATIC
+BOOLEAN
+IsValidTimeZone (
+ IN INT16 TimeZone
+ )
+{
+ return TimeZone == EFI_UNSPECIFIED_TIMEZONE ||
+ (TimeZone >= -1440 && TimeZone <= 1440);
+}
+
+STATIC
+BOOLEAN
+IsValidDaylight (
+ IN INT8 Daylight
+ )
+{
+ return Daylight == 0 ||
+ Daylight == EFI_TIME_ADJUST_DAYLIGHT ||
+ Daylight == (EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT);
+}
+STATIC
+BOOLEAN
+EFIAPI
+IsLeapYear (
+ IN EFI_TIME *Time
+ )
+{
+ if (Time->Year % 4 == 0) {
+ if (Time->Year % 100 == 0) {
+ if (Time->Year % 400 == 0) {
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+ } else {
+ return TRUE;
+ }
+ } else {
+ return FALSE;
+ }
+}
+
+STATIC CONST INTN mDayOfMonth[12] = {
+ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+};
+
+STATIC
+BOOLEAN
+EFIAPI
+IsDayValid (
+ IN EFI_TIME *Time
+ )
+{
+ ASSERT (Time->Day >= 1);
+ ASSERT (Time->Day <= mDayOfMonth[Time->Month - 1]);
+ ASSERT (Time->Month != 2 || IsLeapYear (Time) || Time->Day <= 28);
+
+ if (Time->Day < 1 ||
+ Time->Day > mDayOfMonth[Time->Month - 1] ||
+ (Time->Month == 2 && !IsLeapYear (Time) && Time->Day > 28)) {
+ return FALSE;
+ }
+ return TRUE;
+}
+
+STATIC
+BOOLEAN
+EFIAPI
+IsTimeValid(
+ IN EFI_TIME *Time
+ )
+{
+ // Check the input parameters are within the range specified by UEFI
+ if (Time->Year < 1900 ||
+ Time->Year > 9999 ||
+ Time->Month < 1 ||
+ Time->Month > 12 ||
+ !IsDayValid (Time) ||
+ Time->Hour > 23 ||
+ Time->Minute > 59 ||
+ Time->Second > 59 ||
+ !IsValidTimeZone (Time->TimeZone) ||
+ !IsValidDaylight (Time->Daylight)) {
+ return FALSE;
+ }
+ return TRUE;
+}
/**
Returns the current time and date information, and the time-keeping capabilities
@@ -43,9 +143,20 @@ EFI_STATUS EFIAPI
GetTime (
OUT EFI_TIME *Time,
- OUT EFI_TIME_CAPABILITIES *Capabilities
+ OUT EFI_TIME_CAPABILITIES *Capabilities
)
{
+ if (Time == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Set these first so the RealTimeClockLib implementation
+ // can override them based on its own settings.
+ //
+ Time->TimeZone = mTimeSettings.TimeZone;
+ Time->Daylight = mTimeSettings.Daylight;
+
return LibGetTime (Time, Capabilities);
}
@@ -67,7 +178,41 @@ SetTime ( IN EFI_TIME *Time
)
{
- return LibSetTime (Time);
+ EFI_STATUS Status;
+ BOOLEAN TimeSettingsChanged;
+
+ if (Time == NULL || !IsTimeValid (Time)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ TimeSettingsChanged = FALSE;
+ if (mTimeSettings.TimeZone != Time->TimeZone ||
+ mTimeSettings.Daylight != Time->Daylight) {
+
+ mTimeSettings.TimeZone = Time->TimeZone;
+ mTimeSettings.Daylight = Time->Daylight;
+ TimeSettingsChanged = TRUE;
+ }
+
+ Status = LibSetTime (Time);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (TimeSettingsChanged) {
+ Status = EfiSetVariable (
+ (CHAR16 *)mTimeSettingsVariableName,
+ &gEfiCallerIdGuid,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS,
+ sizeof (mTimeSettings),
+ (VOID *)&mTimeSettings);
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+ }
+ return EFI_SUCCESS;
}
@@ -138,12 +283,26 @@ InitializeRealTimeClock ( )
{
EFI_STATUS Status;
+ UINTN Size;
Status = LibRtcInitialize (ImageHandle, SystemTable);
if (EFI_ERROR (Status)) {
return Status;
}
+ Size = sizeof (mTimeSettings);
+ Status = EfiGetVariable ((CHAR16 *)mTimeSettingsVariableName,
+ &gEfiCallerIdGuid, NULL, &Size, (VOID *)&mTimeSettings);
+ if (EFI_ERROR (Status) ||
+ !IsValidTimeZone (mTimeSettings.TimeZone) ||
+ !IsValidDaylight (mTimeSettings.Daylight)) {
+ DEBUG ((DEBUG_WARN, "%a: using default timezone/daylight settings\n",
+ __FUNCTION__));
+
+ mTimeSettings.TimeZone = EFI_UNSPECIFIED_TIMEZONE;
+ mTimeSettings.Daylight = 0;
+ }
+
SystemTable->RuntimeServices->GetTime = GetTime;
SystemTable->RuntimeServices->SetTime = SetTime;
SystemTable->RuntimeServices->GetWakeupTime = GetWakeupTime;
diff --git a/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf b/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf index 186d4610bd..d0520392f1 100644 --- a/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf +++ b/EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf @@ -1,8 +1,8 @@ #/** @file
-# Reset Architectural Protocol Driver as defined in PI
+# Real Time Clock Architectural Protocol Driver as defined in PI
#
-# This Reset module simulates system reset by process exit on NT.
-# Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@@ -31,10 +31,11 @@ EmbeddedPkg/EmbeddedPkg.dec
[LibraryClasses]
- UefiBootServicesTableLib
- UefiDriverEntryPoint
DebugLib
RealTimeClockLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiRuntimeLib
[Protocols]
gEfiRealTimeClockArchProtocolGuid
|