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1 | /** @file\r |
2 | ACPI CPU Data initialization module\r | |
3 | \r | |
4 | This module initializes the ACPI_CPU_DATA structure and registers the address\r | |
5 | of this structure in the PcdCpuS3DataAddress PCD. This is a generic/simple\r | |
6 | version of this module. It does not provide a machine check handler or CPU\r | |
7 | register initialization tables for ACPI S3 resume. It also only supports the\r | |
8 | number of CPUs reported by the MP Services Protocol, so this module does not\r | |
9 | support hot plug CPUs. This module can be copied into a CPU specific package\r | |
10 | and customized if these additional features are required.\r | |
11 | \r | |
12 | Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
13 | Copyright (c) 2015, Red Hat, Inc.\r | |
14 | \r | |
15 | This program and the accompanying materials\r | |
16 | are licensed and made available under the terms and conditions of the BSD License\r | |
17 | which accompanies this distribution. The full text of the license may be found at\r | |
18 | http://opensource.org/licenses/bsd-license.php\r | |
19 | \r | |
20 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
21 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
22 | \r | |
23 | **/\r | |
24 | \r | |
25 | #include <PiDxe.h>\r | |
26 | \r | |
27 | #include <AcpiCpuData.h>\r | |
28 | \r | |
29 | #include <Library/BaseLib.h>\r | |
30 | #include <Library/BaseMemoryLib.h>\r | |
31 | #include <Library/UefiBootServicesTableLib.h>\r | |
32 | #include <Library/DebugLib.h>\r | |
33 | #include <Library/MtrrLib.h>\r | |
34 | \r | |
35 | #include <Protocol/MpService.h>\r | |
36 | #include <Guid/EventGroup.h>\r | |
37 | \r | |
38 | //\r | |
39 | // Data structure used to allocate ACPI_CPU_DATA and its supporting structures\r | |
40 | //\r | |
41 | typedef struct {\r | |
42 | ACPI_CPU_DATA AcpiCpuData;\r | |
43 | MTRR_SETTINGS MtrrTable;\r | |
44 | IA32_DESCRIPTOR GdtrProfile;\r | |
45 | IA32_DESCRIPTOR IdtrProfile;\r | |
46 | } ACPI_CPU_DATA_EX;\r | |
47 | \r | |
48 | /**\r | |
49 | Allocate EfiACPIMemoryNVS below 4G memory address.\r | |
50 | \r | |
51 | This function allocates EfiACPIMemoryNVS below 4G memory address.\r | |
52 | \r | |
53 | @param[in] Size Size of memory to allocate.\r | |
54 | \r | |
55 | @return Allocated address for output.\r | |
56 | \r | |
57 | **/\r | |
58 | VOID *\r | |
59 | AllocateAcpiNvsMemoryBelow4G (\r | |
60 | IN UINTN Size\r | |
61 | )\r | |
62 | {\r | |
63 | EFI_PHYSICAL_ADDRESS Address;\r | |
64 | EFI_STATUS Status;\r | |
65 | VOID *Buffer;\r | |
66 | \r | |
67 | Address = BASE_4GB - 1;\r | |
68 | Status = gBS->AllocatePages (\r | |
69 | AllocateMaxAddress,\r | |
70 | EfiACPIMemoryNVS,\r | |
71 | EFI_SIZE_TO_PAGES (Size),\r | |
72 | &Address\r | |
73 | );\r | |
74 | if (EFI_ERROR (Status)) {\r | |
75 | return NULL;\r | |
76 | }\r | |
77 | \r | |
78 | Buffer = (VOID *)(UINTN)Address;\r | |
79 | ZeroMem (Buffer, Size);\r | |
80 | \r | |
81 | return Buffer;\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | Callback function executed when the EndOfDxe event group is signaled.\r | |
86 | \r | |
87 | We delay saving the MTRR settings until BDS signals EndOfDxe.\r | |
88 | \r | |
89 | @param[in] Event Event whose notification function is being invoked.\r | |
90 | @param[out] Context Pointer to the MTRR_SETTINGS buffer to fill in.\r | |
91 | **/\r | |
92 | VOID\r | |
93 | EFIAPI\r | |
94 | SaveMtrrsOnEndOfDxe (\r | |
95 | IN EFI_EVENT Event,\r | |
96 | OUT VOID *Context\r | |
97 | )\r | |
98 | {\r | |
99 | DEBUG ((EFI_D_VERBOSE, "%a\n", __FUNCTION__));\r | |
100 | MtrrGetAllMtrrs (Context);\r | |
101 | \r | |
102 | //\r | |
103 | // Close event, so it will not be invoked again.\r | |
104 | //\r | |
105 | gBS->CloseEvent (Event);\r | |
106 | }\r | |
107 | \r | |
108 | /**\r | |
109 | The entry function of the CpuS3Data driver.\r | |
110 | \r | |
111 | Allocate and initialize all fields of the ACPI_CPU_DATA structure except the\r | |
112 | MTRR settings. Register an event notification on gEfiEndOfDxeEventGroupGuid\r | |
113 | to capture the ACPI_CPU_DATA MTRR settings. The PcdCpuS3DataAddress is set\r | |
114 | to the address that ACPI_CPU_DATA is allocated at.\r | |
115 | \r | |
116 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
117 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
118 | \r | |
119 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
120 | @retval other Some error occurs when executing this entry point.\r | |
121 | \r | |
122 | **/\r | |
123 | EFI_STATUS\r | |
124 | EFIAPI\r | |
125 | CpuS3DataInitialize (\r | |
126 | IN EFI_HANDLE ImageHandle,\r | |
127 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
128 | )\r | |
129 | {\r | |
130 | EFI_STATUS Status;\r | |
131 | ACPI_CPU_DATA_EX *AcpiCpuDataEx;\r | |
132 | ACPI_CPU_DATA *AcpiCpuData;\r | |
133 | EFI_MP_SERVICES_PROTOCOL *MpServices;\r | |
134 | UINTN NumberOfCpus;\r | |
135 | UINTN NumberOfEnabledProcessors;\r | |
136 | VOID *Stack;\r | |
137 | UINTN TableSize;\r | |
138 | CPU_REGISTER_TABLE *RegisterTable;\r | |
139 | UINTN Index;\r | |
140 | EFI_PROCESSOR_INFORMATION ProcessorInfoBuffer;\r | |
141 | UINTN GdtSize;\r | |
142 | UINTN IdtSize;\r | |
143 | VOID *Gdt;\r | |
144 | VOID *Idt;\r | |
145 | EFI_EVENT Event;\r | |
146 | \r | |
147 | //\r | |
148 | // Allocate ACPI NVS memory below 4G memory for use on ACPI S3 resume.\r | |
149 | //\r | |
150 | AcpiCpuDataEx = AllocateAcpiNvsMemoryBelow4G (sizeof (ACPI_CPU_DATA_EX));\r | |
151 | ASSERT (AcpiCpuDataEx != NULL);\r | |
152 | AcpiCpuData = &AcpiCpuDataEx->AcpiCpuData;\r | |
153 | \r | |
154 | //\r | |
155 | // Get MP Services Protocol\r | |
156 | //\r | |
157 | Status = gBS->LocateProtocol (\r | |
158 | &gEfiMpServiceProtocolGuid,\r | |
159 | NULL,\r | |
160 | (VOID **)&MpServices\r | |
161 | );\r | |
162 | ASSERT_EFI_ERROR (Status);\r | |
163 | \r | |
164 | //\r | |
165 | // Allocate a 4KB reserved page below 1MB\r | |
166 | //\r | |
167 | AcpiCpuData->StartupVector = BASE_1MB - 1;\r | |
168 | Status = gBS->AllocatePages (\r | |
169 | AllocateMaxAddress,\r | |
170 | EfiReservedMemoryType,\r | |
171 | 1,\r | |
172 | &AcpiCpuData->StartupVector\r | |
173 | );\r | |
174 | ASSERT_EFI_ERROR (Status);\r | |
175 | \r | |
176 | //\r | |
177 | // Get the number of CPUs\r | |
178 | //\r | |
179 | Status = MpServices->GetNumberOfProcessors (\r | |
180 | MpServices,\r | |
181 | &NumberOfCpus,\r | |
182 | &NumberOfEnabledProcessors\r | |
183 | );\r | |
184 | ASSERT_EFI_ERROR (Status);\r | |
185 | AcpiCpuData->NumberOfCpus = (UINT32)NumberOfCpus;\r | |
186 | \r | |
187 | //\r | |
188 | // Initialize ACPI_CPU_DATA fields\r | |
189 | //\r | |
190 | AcpiCpuData->StackSize = PcdGet32 (PcdCpuApStackSize);\r | |
191 | AcpiCpuData->ApMachineCheckHandlerBase = 0;\r | |
192 | AcpiCpuData->ApMachineCheckHandlerSize = 0;\r | |
193 | AcpiCpuData->GdtrProfile = (EFI_PHYSICAL_ADDRESS)(UINTN)&AcpiCpuDataEx->GdtrProfile;\r | |
194 | AcpiCpuData->IdtrProfile = (EFI_PHYSICAL_ADDRESS)(UINTN)&AcpiCpuDataEx->IdtrProfile;\r | |
195 | AcpiCpuData->MtrrTable = (EFI_PHYSICAL_ADDRESS)(UINTN)&AcpiCpuDataEx->MtrrTable;\r | |
196 | \r | |
197 | //\r | |
198 | // Allocate stack space for all CPUs\r | |
199 | //\r | |
200 | Stack = AllocateAcpiNvsMemoryBelow4G (NumberOfCpus * AcpiCpuData->StackSize);\r | |
201 | ASSERT (Stack != NULL);\r | |
202 | AcpiCpuData->StackAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)Stack;\r | |
203 | \r | |
204 | //\r | |
205 | // Get the boot processor's GDT and IDT\r | |
206 | //\r | |
207 | AsmReadGdtr (&AcpiCpuDataEx->GdtrProfile);\r | |
208 | AsmReadIdtr (&AcpiCpuDataEx->IdtrProfile);\r | |
209 | \r | |
210 | //\r | |
211 | // Allocate GDT and IDT in ACPI NVS and copy current GDT and IDT contents\r | |
212 | //\r | |
213 | GdtSize = AcpiCpuDataEx->GdtrProfile.Limit + 1;\r | |
214 | IdtSize = AcpiCpuDataEx->IdtrProfile.Limit + 1;\r | |
215 | Gdt = AllocateAcpiNvsMemoryBelow4G (GdtSize + IdtSize);\r | |
216 | ASSERT (Gdt != NULL);\r | |
217 | Idt = (VOID *)((UINTN)Gdt + GdtSize);\r | |
218 | CopyMem (Gdt, (VOID *)AcpiCpuDataEx->GdtrProfile.Base, GdtSize);\r | |
219 | CopyMem (Idt, (VOID *)AcpiCpuDataEx->IdtrProfile.Base, IdtSize);\r | |
220 | AcpiCpuDataEx->GdtrProfile.Base = (UINTN)Gdt;\r | |
221 | AcpiCpuDataEx->IdtrProfile.Base = (UINTN)Idt;\r | |
222 | \r | |
223 | //\r | |
224 | // Allocate buffer for empty RegisterTable and PreSmmInitRegisterTable for all CPUs\r | |
225 | //\r | |
226 | TableSize = 2 * NumberOfCpus * sizeof (CPU_REGISTER_TABLE);\r | |
227 | RegisterTable = (CPU_REGISTER_TABLE *)AllocateAcpiNvsMemoryBelow4G (TableSize);\r | |
228 | ASSERT (RegisterTable != NULL);\r | |
229 | for (Index = 0; Index < NumberOfCpus; Index++) {\r | |
230 | Status = MpServices->GetProcessorInfo (\r | |
231 | MpServices,\r | |
232 | Index,\r | |
233 | &ProcessorInfoBuffer\r | |
234 | );\r | |
235 | ASSERT_EFI_ERROR (Status);\r | |
236 | \r | |
237 | RegisterTable[Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;\r | |
238 | RegisterTable[Index].TableLength = 0;\r | |
239 | RegisterTable[Index].AllocatedSize = 0;\r | |
240 | RegisterTable[Index].RegisterTableEntry = NULL;\r | |
241 | \r | |
242 | RegisterTable[NumberOfCpus + Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;\r | |
243 | RegisterTable[NumberOfCpus + Index].TableLength = 0;\r | |
244 | RegisterTable[NumberOfCpus + Index].AllocatedSize = 0;\r | |
245 | RegisterTable[NumberOfCpus + Index].RegisterTableEntry = NULL;\r | |
246 | }\r | |
247 | AcpiCpuData->RegisterTable = (EFI_PHYSICAL_ADDRESS)(UINTN)RegisterTable;\r | |
248 | AcpiCpuData->PreSmmInitRegisterTable = (EFI_PHYSICAL_ADDRESS)(UINTN)(RegisterTable + NumberOfCpus);\r | |
249 | \r | |
250 | //\r | |
251 | // Set PcdCpuS3DataAddress to the base address of the ACPI_CPU_DATA structure\r | |
252 | //\r | |
253 | Status = PcdSet64S (PcdCpuS3DataAddress, (UINT64)(UINTN)AcpiCpuData);\r | |
254 | ASSERT_EFI_ERROR (Status);\r | |
255 | \r | |
256 | //\r | |
257 | // Register EFI_END_OF_DXE_EVENT_GROUP_GUID event.\r | |
258 | // The notification function saves MTRRs for ACPI_CPU_DATA\r | |
259 | //\r | |
260 | Status = gBS->CreateEventEx (\r | |
261 | EVT_NOTIFY_SIGNAL,\r | |
262 | TPL_CALLBACK,\r | |
263 | SaveMtrrsOnEndOfDxe,\r | |
264 | &AcpiCpuDataEx->MtrrTable,\r | |
265 | &gEfiEndOfDxeEventGroupGuid,\r | |
266 | &Event\r | |
267 | );\r | |
268 | ASSERT_EFI_ERROR (Status);\r | |
269 | \r | |
270 | return EFI_SUCCESS;\r | |
271 | }\r |