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/** @file
Adjust Default System Time.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
--*/
#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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