]>
Commit | Line | Data |
---|---|---|
80c4b236 JF |
1 | /** @file\r |
2 | Fast-Strings feature.\r | |
3 | \r | |
4 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r | |
0acd8697 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
80c4b236 JF |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include "CpuCommonFeatures.h"\r | |
10 | \r | |
11 | /**\r | |
12 | Initializes Fast-Strings feature to specific state.\r | |
13 | \r | |
14 | @param[in] ProcessorNumber The index of the CPU executing this function.\r | |
15 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r | |
16 | structure for the CPU executing this function.\r | |
17 | @param[in] ConfigData A pointer to the configuration buffer returned\r | |
18 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r | |
19 | CPU_FEATURE_GET_CONFIG_DATA was not provided in\r | |
20 | RegisterCpuFeature().\r | |
21 | @param[in] State If TRUE, then the Fast-Strings feature must be enabled.\r | |
22 | If FALSE, then the Fast-Strings feature must be disabled.\r | |
23 | \r | |
24 | @retval RETURN_SUCCESS Fast-Strings feature is initialized.\r | |
25 | \r | |
26 | @note This service could be called by BSP only.\r | |
27 | **/\r | |
28 | RETURN_STATUS\r | |
29 | EFIAPI\r | |
30 | FastStringsInitialize (\r | |
31 | IN UINTN ProcessorNumber,\r | |
32 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r | |
33 | IN VOID *ConfigData, OPTIONAL\r | |
34 | IN BOOLEAN State\r | |
35 | )\r | |
36 | {\r | |
d28daadd ED |
37 | //\r |
38 | // The scope of FastStrings bit in the MSR_IA32_MISC_ENABLE is core for below processor type, only program\r | |
39 | // MSR_IA32_MISC_ENABLE for thread 0 in each core.\r | |
40 | //\r | |
41 | if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||\r | |
42 | IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||\r | |
43 | IS_PENTIUM_4_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {\r | |
44 | if (CpuInfo->ProcessorInfo.Location.Thread != 0) {\r | |
45 | return RETURN_SUCCESS;\r | |
46 | }\r | |
47 | }\r | |
48 | \r | |
80c4b236 JF |
49 | CPU_REGISTER_TABLE_WRITE_FIELD (\r |
50 | ProcessorNumber,\r | |
51 | Msr,\r | |
52 | MSR_IA32_MISC_ENABLE,\r | |
53 | MSR_IA32_MISC_ENABLE_REGISTER,\r | |
54 | Bits.FastStrings,\r | |
55 | (State) ? 1 : 0\r | |
56 | );\r | |
57 | return RETURN_SUCCESS;\r | |
58 | }\r |