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Last change
on this file since 87965 was 80721, checked in by vboxsync, 5 years ago |
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Devices/EFI/FirmwareNew: Start upgrade process to edk2-stable201908 (compiles on Windows and works to some extent), bugref:4643
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Property svn:eol-style
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File size:
1005 bytes
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| 1 | /** @file
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| 2 | Stall Services that do stall and also enable the Stall operatation
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| 3 | to be replayed during an S3 resume. This library class maps directly on top
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| 4 | of the Timer class.
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| 5 |
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| 6 | Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
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| 7 |
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| 8 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 9 |
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| 10 | **/
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| 11 |
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| 12 | #include <Base.h>
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| 13 |
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| 14 | #include <Library/TimerLib.h>
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| 15 | #include <Library/DebugLib.h>
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| 16 | #include <Library/S3BootScriptLib.h>
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| 17 | #include <Library/S3StallLib.h>
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| 18 |
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| 19 |
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| 20 | /**
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| 21 | Stalls the CPU for at least the given number of microseconds and and saves
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| 22 | the value in the S3 script to be replayed on S3 resume.
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| 23 |
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| 24 | Stalls the CPU for the number of microseconds specified by MicroSeconds.
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| 25 |
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| 26 | @param MicroSeconds The minimum number of microseconds to delay.
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| 27 |
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| 28 | @return MicroSeconds
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| 29 |
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| 30 | **/
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| 31 | UINTN
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| 32 | EFIAPI
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| 33 | S3Stall (
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| 34 | IN UINTN MicroSeconds
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| 35 | )
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| 36 | {
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| 37 | RETURN_STATUS Status;
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| 38 |
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| 39 | Status = S3BootScriptSaveStall (MicroSecondDelay (MicroSeconds));
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| 40 | ASSERT (Status == RETURN_SUCCESS);
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| 41 |
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| 42 | return MicroSeconds;
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| 43 | }
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| 44 |
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| 45 |
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