1 /** @file 2 Adjust Default System Time. 3 4 Copyright (c) 2015, Intel Corporation. All rights reserved.<BR> 5 6 This program and the accompanying materials are licensed and made available under 7 the terms and conditions of the BSD License that accompanies this distribution. 8 The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php. 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 --*/ 15 16 #include <PlatformDxe.h> 17 18 // 19 // Date and time initial values. 20 // They are used if the RTC values are invalid during driver initialization 21 // 22 #define RTC_INIT_SECOND 0 23 #define RTC_INIT_MINUTE 0 24 #define RTC_INIT_HOUR 0 25 26 CHAR16 mBiosReleaseDate[20]; 27 28 /** 29 Convert a single character to number. 30 It assumes the input Char is in the scope of L'0' ~ L'9' and L'A' ~ L'F' 31 32 @param Char The input char which need to change to a hex number. 33 34 **/ 35 UINTN 36 CharToUint ( 37 IN CHAR16 Char 38 ) 39 { 40 if ((Char >= L'0') && (Char <= L'9')) { 41 return (UINTN) (Char - L'0'); 42 } 43 44 if ((Char >= L'A') && (Char <= L'F')) { 45 return (UINTN) (Char - L'A' + 0xA); 46 } 47 48 ASSERT (FALSE); 49 return 0; 50 } 51 52 /** 53 See if YEAR field of a variable of EFI_TIME type is correct. 54 55 @param Time The time to be checked. 56 57 @retval EFI_INVALID_PARAMETER Some fields of Time are not correct. 58 @retval EFI_SUCCESS Time is a valid EFI_TIME variable. 59 60 **/ 61 EFI_STATUS 62 CheckRtcTimeFields ( 63 IN EFI_TIME *Time 64 ) 65 { 66 UINT16 YearBuilt; 67 68 YearBuilt = (UINT16)(CharToUint(mBiosReleaseDate[8])*10 + CharToUint(mBiosReleaseDate[9]) + 2000); 69 70 if ((Time->Year) < YearBuilt) { 71 return EFI_INVALID_PARAMETER; 72 } 73 74 return EFI_SUCCESS; 75 } 76 77 /** 78 ExitPmAuth Protocol notification event handler, which set initial system time to be 79 the time when BIOS was built. 80 81 @param[in] Event Event whose notification function is being invoked. 82 @param[in] Context Pointer to the notification function's context. 83 84 **/ 85 VOID 86 EFIAPI 87 AdjustDefaultRtcTimeCallback ( 88 IN EFI_EVENT Event, 89 IN VOID *Context 90 ) 91 { 92 EFI_STATUS Status; 93 EFI_TIME EfiTime; 94 CHAR16 BiosVersion[60]; 95 CHAR16 BiosReleaseTime[20]; 96 // 97 // Get BIOS built time from Bios-ID. 98 // 99 100 SetMem(BiosVersion, sizeof(BiosVersion), 0); 101 SetMem(mBiosReleaseDate, sizeof(mBiosReleaseDate), 0); 102 SetMem(BiosReleaseTime, sizeof(BiosReleaseTime), 0); 103 104 Status = GetBiosVersionDateTime (BiosVersion, mBiosReleaseDate, BiosReleaseTime); 105 ASSERT_EFI_ERROR(Status); 106 if (EFI_ERROR (Status)) { 107 return; 108 } 109 110 // 111 // Get current RTC time. 112 // 113 Status = gRT->GetTime (&EfiTime, NULL); 114 115 // 116 // Validate RTC time fields 117 // 118 Status = CheckRtcTimeFields (&EfiTime); 119 120 if (EFI_ERROR (Status)) { 121 // 122 // Date such as Dec 28th of 2015 123 // 124 // Month 125 // BiosReleaseDate[0] = '1'; 126 // BiosReleaseDate[1] = '2'; 127 // 128 // Day 129 // BiosReleaseDate[3] = '2'; 130 // BiosReleaseDate[4] = '8'; 131 // 132 // 133 // Year 134 // 135 // BiosReleaseDate[6] = '2'; 136 // BiosReleaseDate[7] = '0'; 137 // BiosReleaseDate[8] = '1' 138 // BiosReleaseDate[9] = '5'; 139 140 EfiTime.Second = RTC_INIT_SECOND; 141 EfiTime.Minute = RTC_INIT_MINUTE; 142 EfiTime.Hour = RTC_INIT_HOUR; 143 EfiTime.Day = (UINT8)(CharToUint(mBiosReleaseDate[3])*10 + CharToUint(mBiosReleaseDate[4])); 144 EfiTime.Month = (UINT8)(CharToUint(mBiosReleaseDate[0])*10 + CharToUint(mBiosReleaseDate[1])); 145 EfiTime.Year = (UINT16)(CharToUint(mBiosReleaseDate[8])*10 + CharToUint(mBiosReleaseDate[9]) + 2000); 146 EfiTime.Nanosecond = 0; 147 EfiTime.TimeZone = EFI_UNSPECIFIED_TIMEZONE; 148 EfiTime.Daylight = 1; 149 150 DEBUG ((EFI_D_INFO, "Day:%d Month:%d Year:%d \n", (UINT32)EfiTime.Day, (UINT32)EfiTime.Month, (UINT32)EfiTime.Year)); 151 152 // 153 // Reset time value according to new RTC configuration 154 // 155 Status = gRT->SetTime (&EfiTime); 156 ASSERT_EFI_ERROR(Status); 157 } 158 159 return; 160 } 161
