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1 | /** @file\r |
2 | Fast-Strings feature.\r | |
3 | \r | |
4 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "CpuCommonFeatures.h"\r | |
16 | \r | |
17 | /**\r | |
18 | Initializes Fast-Strings feature to specific state.\r | |
19 | \r | |
20 | @param[in] ProcessorNumber The index of the CPU executing this function.\r | |
21 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r | |
22 | structure for the CPU executing this function.\r | |
23 | @param[in] ConfigData A pointer to the configuration buffer returned\r | |
24 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r | |
25 | CPU_FEATURE_GET_CONFIG_DATA was not provided in\r | |
26 | RegisterCpuFeature().\r | |
27 | @param[in] State If TRUE, then the Fast-Strings feature must be enabled.\r | |
28 | If FALSE, then the Fast-Strings feature must be disabled.\r | |
29 | \r | |
30 | @retval RETURN_SUCCESS Fast-Strings feature is initialized.\r | |
31 | \r | |
32 | @note This service could be called by BSP only.\r | |
33 | **/\r | |
34 | RETURN_STATUS\r | |
35 | EFIAPI\r | |
36 | FastStringsInitialize (\r | |
37 | IN UINTN ProcessorNumber,\r | |
38 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r | |
39 | IN VOID *ConfigData, OPTIONAL\r | |
40 | IN BOOLEAN State\r | |
41 | )\r | |
42 | {\r | |
43 | CPU_REGISTER_TABLE_WRITE_FIELD (\r | |
44 | ProcessorNumber,\r | |
45 | Msr,\r | |
46 | MSR_IA32_MISC_ENABLE,\r | |
47 | MSR_IA32_MISC_ENABLE_REGISTER,\r | |
48 | Bits.FastStrings,\r | |
49 | (State) ? 1 : 0\r | |
50 | );\r | |
51 | return RETURN_SUCCESS;\r | |
52 | }\r |