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fe69ac84 | 1 | /** @file\r |
2 | Stall Services that do stall and also enable the Stall operatation\r | |
3 | to be replayed during an S3 resume. This library class maps directly on top\r | |
4 | of the Timer class. \r | |
5 | \r | |
6 | Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r | |
7 | \r | |
8 | This program and the accompanying materials\r | |
9 | are licensed and made available under the terms and conditions\r | |
10 | of the BSD License which accompanies this distribution. The\r | |
11 | full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #include <Base.h>\r | |
20 | \r | |
21 | #include <Library/TimerLib.h>\r | |
22 | #include <Library/DebugLib.h>\r | |
23 | #include <Library/S3BootScriptLib.h>\r | |
24 | #include <Library/S3StallLib.h>\r | |
25 | \r | |
26 | \r | |
27 | /**\r | |
28 | Stalls the CPU for at least the given number of microseconds and and saves\r | |
29 | the value in the S3 script to be replayed on S3 resume.\r | |
30 | \r | |
31 | Stalls the CPU for the number of microseconds specified by MicroSeconds.\r | |
32 | \r | |
33 | @param MicroSeconds The minimum number of microseconds to delay.\r | |
34 | \r | |
35 | @return MicroSeconds\r | |
36 | \r | |
37 | **/\r | |
38 | UINTN\r | |
39 | EFIAPI\r | |
40 | S3Stall (\r | |
41 | IN UINTN MicroSeconds\r | |
42 | )\r | |
43 | {\r | |
44 | RETURN_STATUS Status;\r | |
45 | \r | |
46 | Status = S3BootScriptSaveStall (MicroSecondDelay (MicroSeconds));\r | |
47 | ASSERT (Status == RETURN_SUCCESS);\r | |
48 | \r | |
49 | return MicroSeconds;\r | |
50 | }\r | |
51 | \r | |
52 | \r |