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