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Commit | Line | Data |
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e1f414b6 | 1 | /** @file\r |
2 | AsmMonitor function\r | |
3 | \r | |
bb817c56 | 4 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
e1f414b6 | 6 | \r |
7 | **/\r | |
8 | \r | |
42eedea9 | 9 | /**\r |
10 | Sets up a monitor buffer that is used by AsmMwait().\r | |
11 | \r | |
12 | Executes a MONITOR instruction with the register state specified by Eax, Ecx\r | |
030cd1a2 | 13 | and Edx. Returns Eax. This function is only available on IA-32 and x64.\r |
42eedea9 | 14 | \r |
44b013bd | 15 | @param RegisterEax The value to load into EAX or RAX before executing the MONITOR\r |
16 | instruction.\r | |
17 | @param RegisterEcx The value to load into ECX or RCX before executing the MONITOR\r | |
18 | instruction.\r | |
19 | @param RegisterEdx The value to load into EDX or RDX before executing the MONITOR\r | |
20 | instruction.\r | |
42eedea9 | 21 | \r |
44b013bd | 22 | @return RegisterEax\r |
42eedea9 | 23 | \r |
24 | **/\r | |
e1f414b6 | 25 | UINTN\r |
26 | EFIAPI\r | |
27 | AsmMonitor (\r | |
2f88bd3a MK |
28 | IN UINTN RegisterEax,\r |
29 | IN UINTN RegisterEcx,\r | |
30 | IN UINTN RegisterEdx\r | |
e1f414b6 | 31 | )\r |
32 | {\r | |
33 | _asm {\r | |
34 | mov eax, RegisterEax\r | |
35 | mov ecx, RegisterEcx\r | |
36 | mov edx, RegisterEdx\r | |
37 | _emit 0x0f // monitor\r | |
38 | _emit 0x01\r | |
39 | _emit 0xc8\r | |
40 | }\r | |
41 | }\r |