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1 | /** @file\r | |
2 | X2Apic 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 | Prepares for the data used by CPU feature detection and initialization.\r | |
19 | \r | |
20 | @param[in] NumberOfProcessors The number of CPUs in the platform.\r | |
21 | \r | |
22 | @return Pointer to a buffer of CPU related configuration data.\r | |
23 | \r | |
24 | @note This service could be called by BSP only.\r | |
25 | **/\r | |
26 | VOID *\r | |
27 | EFIAPI\r | |
28 | X2ApicGetConfigData (\r | |
29 | IN UINTN NumberOfProcessors\r | |
30 | )\r | |
31 | {\r | |
32 | BOOLEAN *ConfigData;\r | |
33 | \r | |
34 | ConfigData = AllocateZeroPool (sizeof (BOOLEAN) * NumberOfProcessors);\r | |
35 | ASSERT (ConfigData != NULL);\r | |
36 | return ConfigData;\r | |
37 | }\r | |
38 | \r | |
39 | /**\r | |
40 | Detects if X2Apci feature supported on current processor.\r | |
41 | \r | |
42 | Detect if X2Apci has been already enabled.\r | |
43 | \r | |
44 | @param[in] ProcessorNumber The index of the CPU executing this function.\r | |
45 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r | |
46 | structure for the CPU executing this function.\r | |
47 | @param[in] ConfigData A pointer to the configuration buffer returned\r | |
48 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r | |
49 | CPU_FEATURE_GET_CONFIG_DATA was not provided in\r | |
50 | RegisterCpuFeature().\r | |
51 | \r | |
52 | @retval TRUE X2Apci feature is supported.\r | |
53 | @retval FALSE X2Apci feature is not supported.\r | |
54 | \r | |
55 | @note This service could be called by BSP/APs.\r | |
56 | **/\r | |
57 | BOOLEAN\r | |
58 | EFIAPI\r | |
59 | X2ApicSupport (\r | |
60 | IN UINTN ProcessorNumber,\r | |
61 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r | |
62 | IN VOID *ConfigData OPTIONAL\r | |
63 | )\r | |
64 | {\r | |
65 | BOOLEAN *X2ApicEnabled;\r | |
66 | \r | |
67 | ASSERT (ConfigData != NULL);\r | |
68 | X2ApicEnabled = (BOOLEAN *) ConfigData;\r | |
69 | //\r | |
70 | // *ConfigData indicates if X2APIC enabled on current processor\r | |
71 | //\r | |
72 | X2ApicEnabled[ProcessorNumber] = (GetApicMode () == LOCAL_APIC_MODE_X2APIC) ? TRUE : FALSE;\r | |
73 | \r | |
74 | return (CpuInfo->CpuIdVersionInfoEcx.Bits.x2APIC == 1);\r | |
75 | }\r | |
76 | \r | |
77 | /**\r | |
78 | Initializes X2Apci feature to specific state.\r | |
79 | \r | |
80 | @param[in] ProcessorNumber The index of the CPU executing this function.\r | |
81 | @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r | |
82 | structure for the CPU executing this function.\r | |
83 | @param[in] ConfigData A pointer to the configuration buffer returned\r | |
84 | by CPU_FEATURE_GET_CONFIG_DATA. NULL if\r | |
85 | CPU_FEATURE_GET_CONFIG_DATA was not provided in\r | |
86 | RegisterCpuFeature().\r | |
87 | @param[in] State If TRUE, then the X2Apci feature must be enabled.\r | |
88 | If FALSE, then the X2Apci feature must be disabled.\r | |
89 | \r | |
90 | @retval RETURN_SUCCESS X2Apci feature is initialized.\r | |
91 | \r | |
92 | @note This service could be called by BSP only.\r | |
93 | **/\r | |
94 | RETURN_STATUS\r | |
95 | EFIAPI\r | |
96 | X2ApicInitialize (\r | |
97 | IN UINTN ProcessorNumber,\r | |
98 | IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,\r | |
99 | IN VOID *ConfigData, OPTIONAL\r | |
100 | IN BOOLEAN State\r | |
101 | )\r | |
102 | {\r | |
103 | BOOLEAN *X2ApicEnabled;\r | |
104 | \r | |
105 | ASSERT (ConfigData != NULL);\r | |
106 | X2ApicEnabled = (BOOLEAN *) ConfigData;\r | |
107 | if (X2ApicEnabled[ProcessorNumber]) {\r | |
108 | PRE_SMM_CPU_REGISTER_TABLE_WRITE_FIELD (\r | |
109 | ProcessorNumber,\r | |
110 | Msr,\r | |
111 | MSR_IA32_APIC_BASE,\r | |
112 | MSR_IA32_APIC_BASE_REGISTER,\r | |
113 | Bits.EXTD,\r | |
114 | 1\r | |
115 | );\r | |
116 | } else {\r | |
117 | //\r | |
118 | // Enable X2APIC mode only if X2APIC is not enabled,\r | |
119 | // Needn't to disabe X2APIC mode again if X2APIC is not enabled\r | |
120 | //\r | |
121 | if (State) {\r | |
122 | CPU_REGISTER_TABLE_WRITE_FIELD (\r | |
123 | ProcessorNumber,\r | |
124 | Msr,\r | |
125 | MSR_IA32_APIC_BASE,\r | |
126 | MSR_IA32_APIC_BASE_REGISTER,\r | |
127 | Bits.EXTD,\r | |
128 | 1\r | |
129 | );\r | |
130 | }\r | |
131 | }\r | |
132 | return RETURN_SUCCESS;\r | |
133 | }\r |