diff options
Diffstat (limited to 'Vlv2TbltDevicePkg/PlatformDxe/Rtc.c')
| -rw-r--r-- | Vlv2TbltDevicePkg/PlatformDxe/Rtc.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/Vlv2TbltDevicePkg/PlatformDxe/Rtc.c b/Vlv2TbltDevicePkg/PlatformDxe/Rtc.c new file mode 100644 index 0000000000..caa042ff4f --- /dev/null +++ b/Vlv2TbltDevicePkg/PlatformDxe/Rtc.c @@ -0,0 +1,160 @@ +/** @file
+ Adjust Default System Time.
+
+ Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials are licensed and made available under
+ the terms and conditions of the BSD License that 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 <PlatformDxe.h>
+
+//
+// Date and time initial values.
+// They are used if the RTC values are invalid during driver initialization
+//
+#define RTC_INIT_SECOND 0
+#define RTC_INIT_MINUTE 0
+#define RTC_INIT_HOUR 0
+
+CHAR16 mBiosReleaseDate[20];
+
+/**
+ Convert a single character to number.
+ It assumes the input Char is in the scope of L'0' ~ L'9' and L'A' ~ L'F'
+
+ @param Char The input char which need to change to a hex number.
+
+**/
+UINTN
+CharToUint (
+ IN CHAR16 Char
+ )
+{
+ if ((Char >= L'0') && (Char <= L'9')) {
+ return (UINTN) (Char - L'0');
+ }
+
+ if ((Char >= L'A') && (Char <= L'F')) {
+ return (UINTN) (Char - L'A' + 0xA);
+ }
+
+ ASSERT (FALSE);
+ return 0;
+}
+
+/**
+ See if YEAR field of a variable of EFI_TIME type is correct.
+
+ @param Time The time to be checked.
+
+ @retval EFI_INVALID_PARAMETER Some fields of Time are not correct.
+ @retval EFI_SUCCESS Time is a valid EFI_TIME variable.
+
+**/
+EFI_STATUS
+CheckRtcTimeFields (
+ IN EFI_TIME *Time
+ )
+{
+ UINT16 YearBuilt;
+
+ YearBuilt = (UINT16)(CharToUint(mBiosReleaseDate[8])*10 + CharToUint(mBiosReleaseDate[9]) + 2000);
+
+ if ((Time->Year) < YearBuilt) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ ExitPmAuth Protocol notification event handler, which set initial system time to be
+ the time when BIOS was built.
+
+ @param[in] Event Event whose notification function is being invoked.
+ @param[in] Context Pointer to the notification function's context.
+
+**/
+VOID
+EFIAPI
+AdjustDefaultRtcTimeCallback (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ EFI_TIME EfiTime;
+ CHAR16 BiosVersion[60];
+ CHAR16 BiosReleaseTime[20];
+ //
+ // Get BIOS built time from Bios-ID.
+ //
+
+ SetMem(BiosVersion, sizeof(BiosVersion), 0);
+ SetMem(mBiosReleaseDate, sizeof(mBiosReleaseDate), 0);
+ SetMem(BiosReleaseTime, sizeof(BiosReleaseTime), 0);
+
+ Status = GetBiosVersionDateTime (BiosVersion, mBiosReleaseDate, BiosReleaseTime);
+ ASSERT_EFI_ERROR(Status);
+ if (EFI_ERROR (Status)) {
+ return;
+ }
+
+ //
+ // Get current RTC time.
+ //
+ Status = gRT->GetTime (&EfiTime, NULL);
+
+ //
+ // Validate RTC time fields
+ //
+ Status = CheckRtcTimeFields (&EfiTime);
+
+ if (EFI_ERROR (Status)) {
+ //
+ // Date such as Dec 28th of 2015
+ //
+ // Month
+ // BiosReleaseDate[0] = '1';
+ // BiosReleaseDate[1] = '2';
+ //
+ // Day
+ // BiosReleaseDate[3] = '2';
+ // BiosReleaseDate[4] = '8';
+ //
+ //
+ // Year
+ //
+ // BiosReleaseDate[6] = '2';
+ // BiosReleaseDate[7] = '0';
+ // BiosReleaseDate[8] = '1'
+ // BiosReleaseDate[9] = '5';
+
+ EfiTime.Second = RTC_INIT_SECOND;
+ EfiTime.Minute = RTC_INIT_MINUTE;
+ EfiTime.Hour = RTC_INIT_HOUR;
+ EfiTime.Day = (UINT8)(CharToUint(mBiosReleaseDate[3])*10 + CharToUint(mBiosReleaseDate[4]));
+ EfiTime.Month = (UINT8)(CharToUint(mBiosReleaseDate[0])*10 + CharToUint(mBiosReleaseDate[1]));
+ EfiTime.Year = (UINT16)(CharToUint(mBiosReleaseDate[8])*10 + CharToUint(mBiosReleaseDate[9]) + 2000);
+ EfiTime.Nanosecond = 0;
+ EfiTime.TimeZone = EFI_UNSPECIFIED_TIMEZONE;
+ EfiTime.Daylight = 1;
+
+ DEBUG ((EFI_D_INFO, "Day:%d Month:%d Year:%d \n", (UINT32)EfiTime.Day, (UINT32)EfiTime.Month, (UINT32)EfiTime.Year));
+
+ //
+ // Reset time value according to new RTC configuration
+ //
+ Status = gRT->SetTime (&EfiTime);
+ ASSERT_EFI_ERROR(Status);
+ }
+
+ return;
+}
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