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a8c44645 | 1 | /** @file\r |
2 | C Run-Time Libraries (CRT) Time Management Routines Wrapper Implementation\r | |
3 | for OpenSSL-based Cryptographic Library (used in SMM).\r | |
4 | \r | |
5 | Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <Library/BaseLib.h>\r | |
17 | #include <Library/IoLib.h>\r | |
18 | #include <OpenSslSupport.h>\r | |
19 | \r | |
20 | #define PCAT_RTC_ADDRESS_REGISTER 0x70\r | |
21 | #define PCAT_RTC_DATA_REGISTER 0x71\r | |
22 | \r | |
23 | #define RTC_ADDRESS_SECONDS 0 // R/W Range 0..59\r | |
24 | #define RTC_ADDRESS_SECONDS_ALARM 1 // R/W Range 0..59\r | |
25 | #define RTC_ADDRESS_MINUTES 2 // R/W Range 0..59\r | |
26 | #define RTC_ADDRESS_MINUTES_ALARM 3 // R/W Range 0..59\r | |
27 | #define RTC_ADDRESS_HOURS 4 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM\r | |
28 | #define RTC_ADDRESS_HOURS_ALARM 5 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM\r | |
29 | #define RTC_ADDRESS_DAY_OF_THE_WEEK 6 // R/W Range 1..7\r | |
30 | #define RTC_ADDRESS_DAY_OF_THE_MONTH 7 // R/W Range 1..31\r | |
31 | #define RTC_ADDRESS_MONTH 8 // R/W Range 1..12\r | |
32 | #define RTC_ADDRESS_YEAR 9 // R/W Range 0..99\r | |
33 | #define RTC_ADDRESS_REGISTER_A 10 // R/W[0..6] R0[7]\r | |
34 | #define RTC_ADDRESS_REGISTER_B 11 // R/W\r | |
35 | #define RTC_ADDRESS_REGISTER_C 12 // RO\r | |
36 | #define RTC_ADDRESS_REGISTER_D 13 // RO\r | |
37 | #define RTC_ADDRESS_CENTURY 50 // R/W Range 19..20 Bit 8 is R/W\r | |
38 | \r | |
39 | //\r | |
40 | // Register A\r | |
41 | //\r | |
42 | typedef struct {\r | |
43 | UINT8 RS : 4; // Rate Selection Bits\r | |
44 | UINT8 DV : 3; // Divisor\r | |
45 | UINT8 UIP : 1; // Update in progress\r | |
46 | } RTC_REGISTER_A_BITS;\r | |
47 | \r | |
48 | typedef union {\r | |
49 | RTC_REGISTER_A_BITS Bits;\r | |
50 | UINT8 Data;\r | |
51 | } RTC_REGISTER_A;\r | |
52 | \r | |
53 | //\r | |
54 | // Register B\r | |
55 | //\r | |
56 | typedef struct {\r | |
57 | UINT8 DSE : 1; // 0 - Daylight saving disabled 1 - Daylight savings enabled\r | |
58 | UINT8 MIL : 1; // 0 - 12 hour mode 1 - 24 hour mode\r | |
59 | UINT8 DM : 1; // 0 - BCD Format 1 - Binary Format\r | |
60 | UINT8 SQWE : 1; // 0 - Disable SQWE output 1 - Enable SQWE output\r | |
61 | UINT8 UIE : 1; // 0 - Update INT disabled 1 - Update INT enabled\r | |
62 | UINT8 AIE : 1; // 0 - Alarm INT disabled 1 - Alarm INT Enabled\r | |
63 | UINT8 PIE : 1; // 0 - Periodic INT disabled 1 - Periodic INT Enabled\r | |
64 | UINT8 SET : 1; // 0 - Normal operation. 1 - Updates inhibited\r | |
65 | } RTC_REGISTER_B_BITS;\r | |
66 | \r | |
67 | typedef union {\r | |
68 | RTC_REGISTER_B_BITS Bits;\r | |
69 | UINT8 Data;\r | |
70 | } RTC_REGISTER_B;\r | |
71 | \r | |
72 | //\r | |
73 | // -- Time Management Routines --\r | |
74 | //\r | |
75 | \r | |
76 | #define IsLeap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))\r | |
77 | #define SECSPERHOUR (60 * 60)\r | |
78 | #define SECSPERDAY (24 * SECSPERHOUR)\r | |
79 | \r | |
80 | //\r | |
81 | // The arrays give the cumulative number of days up to the first of the\r | |
82 | // month number used as the index (1 -> 12) for regular and leap years.\r | |
83 | // The value at index 13 is for the whole year.\r | |
84 | //\r | |
85 | UINTN CumulativeDays[2][14] = {\r | |
86 | {\r | |
87 | 0,\r | |
88 | 0,\r | |
89 | 31,\r | |
90 | 31 + 28,\r | |
91 | 31 + 28 + 31,\r | |
92 | 31 + 28 + 31 + 30,\r | |
93 | 31 + 28 + 31 + 30 + 31,\r | |
94 | 31 + 28 + 31 + 30 + 31 + 30,\r | |
95 | 31 + 28 + 31 + 30 + 31 + 30 + 31,\r | |
96 | 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,\r | |
97 | 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,\r | |
98 | 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,\r | |
99 | 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,\r | |
100 | 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31\r | |
101 | },\r | |
102 | {\r | |
103 | 0,\r | |
104 | 0,\r | |
105 | 31,\r | |
106 | 31 + 29,\r | |
107 | 31 + 29 + 31,\r | |
108 | 31 + 29 + 31 + 30,\r | |
109 | 31 + 29 + 31 + 30 + 31,\r | |
110 | 31 + 29 + 31 + 30 + 31 + 30,\r | |
111 | 31 + 29 + 31 + 30 + 31 + 30 + 31,\r | |
112 | 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,\r | |
113 | 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,\r | |
114 | 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,\r | |
115 | 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,\r | |
116 | 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 \r | |
117 | }\r | |
118 | };\r | |
119 | \r | |
120 | /**\r | |
121 | Read RTC content through its registers.\r | |
122 | \r | |
123 | @param Address Address offset of RTC. It is recommended to use macros such as\r | |
124 | RTC_ADDRESS_SECONDS.\r | |
125 | \r | |
126 | @return The data of UINT8 type read from RTC.\r | |
127 | **/\r | |
128 | UINT8\r | |
129 | RtcRead (\r | |
130 | IN UINT8 Address\r | |
131 | )\r | |
132 | {\r | |
133 | IoWrite8 (PCAT_RTC_ADDRESS_REGISTER, (UINT8) (Address | (UINT8) (IoRead8 (PCAT_RTC_ADDRESS_REGISTER) & BIT7)));\r | |
134 | return IoRead8 (PCAT_RTC_DATA_REGISTER);\r | |
135 | }\r | |
136 | \r | |
137 | /* Get the system time as seconds elapsed since midnight, January 1, 1970. */\r | |
138 | //INTN time(\r | |
139 | // INTN *timer\r | |
140 | // )\r | |
141 | time_t time (time_t *timer)\r | |
142 | {\r | |
143 | UINT16 Year;\r | |
144 | UINT8 Month;\r | |
145 | UINT8 Day;\r | |
146 | UINT8 Hour;\r | |
147 | UINT8 Minute;\r | |
148 | UINT8 Second;\r | |
149 | UINT8 Century;\r | |
150 | RTC_REGISTER_A RegisterA;\r | |
151 | RTC_REGISTER_B RegisterB;\r | |
152 | BOOLEAN IsPM;\r | |
153 | UINT16 YearIndex;\r | |
154 | \r | |
155 | RegisterA.Data = RtcRead (RTC_ADDRESS_REGISTER_A);\r | |
156 | while (RegisterA.Bits.UIP == 1) {\r | |
157 | CpuPause();\r | |
158 | RegisterA.Data = RtcRead (RTC_ADDRESS_REGISTER_A);\r | |
159 | }\r | |
160 | \r | |
161 | Second = RtcRead (RTC_ADDRESS_SECONDS);\r | |
162 | Minute = RtcRead (RTC_ADDRESS_MINUTES);\r | |
163 | Hour = RtcRead (RTC_ADDRESS_HOURS);\r | |
164 | Day = RtcRead (RTC_ADDRESS_DAY_OF_THE_MONTH);\r | |
165 | Month = RtcRead (RTC_ADDRESS_MONTH);\r | |
166 | Year = RtcRead (RTC_ADDRESS_YEAR);\r | |
167 | Century = RtcRead (RTC_ADDRESS_CENTURY);\r | |
168 | \r | |
169 | RegisterB.Data = RtcRead (RTC_ADDRESS_REGISTER_B);\r | |
170 | \r | |
171 | if ((Hour & BIT7) != 0) {\r | |
172 | IsPM = TRUE;\r | |
173 | } else {\r | |
174 | IsPM = FALSE;\r | |
175 | }\r | |
176 | Hour = (UINT8) (Hour & 0x7f);\r | |
177 | \r | |
178 | if (RegisterB.Bits.DM == 0) {\r | |
179 | Year = BcdToDecimal8 ((UINT8) Year);\r | |
180 | Month = BcdToDecimal8 (Month);\r | |
181 | Day = BcdToDecimal8 (Day);\r | |
182 | Hour = BcdToDecimal8 (Hour);\r | |
183 | Minute = BcdToDecimal8 (Minute);\r | |
184 | Second = BcdToDecimal8 (Second);\r | |
185 | }\r | |
186 | Century = BcdToDecimal8 (Century);\r | |
187 | \r | |
188 | Year = (UINT16) (Century * 100 + Year);\r | |
189 | \r | |
190 | //\r | |
191 | // If time is in 12 hour format, convert it to 24 hour format\r | |
192 | //\r | |
193 | if (RegisterB.Bits.MIL == 0) {\r | |
194 | if (IsPM && Hour < 12) {\r | |
195 | Hour = (UINT8) (Hour + 12);\r | |
196 | }\r | |
197 | if (!IsPM && Hour == 12) {\r | |
198 | Hour = 0;\r | |
199 | }\r | |
200 | }\r | |
201 | \r | |
202 | //\r | |
203 | // Years Handling\r | |
204 | // UTime should now be set to 00:00:00 on Jan 1 of the current year.\r | |
205 | //\r | |
206 | for (YearIndex = 1970, *timer = 0; YearIndex != Year; YearIndex++) {\r | |
207 | *timer = *timer + (time_t)(CumulativeDays[IsLeap(YearIndex)][13] * SECSPERDAY);\r | |
208 | }\r | |
209 | \r | |
210 | //\r | |
211 | // Add in number of seconds for current Month, Day, Hour, Minute, Seconds, and TimeZone adjustment\r | |
212 | //\r | |
213 | ASSERT (Month <= 12);\r | |
214 | *timer = *timer + \r | |
215 | (time_t)(CumulativeDays[IsLeap(Year)][Month] * SECSPERDAY) + \r | |
216 | (time_t)((Day - 1) * SECSPERDAY) + \r | |
217 | (time_t)(Hour * SECSPERHOUR) + \r | |
218 | (time_t)(Minute * 60) + \r | |
219 | (time_t)Second;\r | |
220 | \r | |
221 | return *timer;\r | |
222 | }\r |