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1 | /** @file\r |
2 | C funtions in SEC\r | |
3 | \r | |
4 | Copyright (c) 2013, 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 | \r | |
16 | #include "SecMain.h"\r | |
17 | \r | |
18 | EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI gSecTemporaryRamSupportPpi = {\r | |
19 | SecTemporaryRamSupport\r | |
20 | };\r | |
21 | \r | |
22 | EFI_PEI_PPI_DESCRIPTOR mPeiSecPlatformInformationPpi[] = {\r | |
23 | {\r | |
24 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
25 | &gEfiTemporaryRamSupportPpiGuid,\r | |
26 | &gSecTemporaryRamSupportPpi\r | |
27 | }\r | |
28 | };\r | |
29 | \r | |
30 | //\r | |
31 | // These are IDT entries pointing to 10:FFFFFFE4h.\r | |
32 | //\r | |
33 | UINT64 mIdtEntryTemplate = 0xffff8e000010ffe4ULL;\r | |
34 | \r | |
35 | /**\r | |
36 | Caller provided function to be invoked at the end of InitializeDebugAgent().\r | |
37 | \r | |
38 | Entry point to the C language phase of SEC. After the SEC assembly\r | |
39 | code has initialized some temporary memory and set up the stack,\r | |
40 | the control is transferred to this function.\r | |
41 | \r | |
42 | @param[in] Context The first input parameter of InitializeDebugAgent().\r | |
43 | \r | |
44 | **/\r | |
45 | VOID\r | |
46 | EFIAPI\r | |
47 | SecStartupPhase2(\r | |
48 | IN VOID *Context\r | |
49 | );\r | |
50 | \r | |
51 | \r | |
52 | /**\r | |
53 | \r | |
54 | Entry point to the C language phase of SEC. After the SEC assembly\r | |
55 | code has initialized some temporary memory and set up the stack,\r | |
56 | the control is transferred to this function.\r | |
57 | \r | |
58 | \r | |
59 | @param SizeOfRam Size of the temporary memory available for use.\r | |
60 | @param TempRamBase Base address of tempory ram\r | |
61 | @param BootFirmwareVolume Base address of the Boot Firmware Volume.\r | |
62 | **/\r | |
63 | VOID\r | |
64 | EFIAPI\r | |
65 | SecStartup (\r | |
66 | IN UINT32 SizeOfRam,\r | |
67 | IN UINT32 TempRamBase,\r | |
68 | IN VOID *BootFirmwareVolume\r | |
69 | )\r | |
70 | {\r | |
71 | EFI_SEC_PEI_HAND_OFF SecCoreData;\r | |
72 | IA32_DESCRIPTOR IdtDescriptor;\r | |
73 | SEC_IDT_TABLE IdtTableInStack;\r | |
74 | UINT32 Index;\r | |
75 | UINT32 PeiStackSize;\r | |
76 | \r | |
77 | PeiStackSize = (SizeOfRam >> 1);\r | |
78 | \r | |
79 | ASSERT (PeiStackSize < SizeOfRam);\r | |
80 | \r | |
81 | //\r | |
82 | // Process all libraries constructor function linked to SecCore.\r | |
83 | //\r | |
84 | ProcessLibraryConstructorList ();\r | |
85 | \r | |
86 | //\r | |
87 | // Initialize floating point operating environment\r | |
88 | // to be compliant with UEFI spec.\r | |
89 | //\r | |
90 | InitializeFloatingPointUnits ();\r | |
91 | \r | |
92 | \r | |
93 | // |-------------------|---->\r | |
94 | // |Idt Table |\r | |
95 | // |-------------------|\r | |
96 | // |PeiService Pointer | PeiStackSize\r | |
97 | // |-------------------|\r | |
98 | // | |\r | |
99 | // | Stack |\r | |
100 | // |-------------------|---->\r | |
101 | // | |\r | |
102 | // | |\r | |
103 | // | Heap | PeiTemporayRamSize\r | |
104 | // | |\r | |
105 | // | |\r | |
106 | // |-------------------|----> TempRamBase\r | |
107 | \r | |
108 | IdtTableInStack.PeiService = 0;\r | |
109 | for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {\r | |
110 | CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&mIdtEntryTemplate, sizeof (UINT64));\r | |
111 | }\r | |
112 | \r | |
113 | IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;\r | |
114 | IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);\r | |
115 | \r | |
116 | AsmWriteIdtr (&IdtDescriptor);\r | |
117 | \r | |
118 | //\r | |
119 | // Update the base address and length of Pei temporary memory\r | |
120 | //\r | |
121 | SecCoreData.DataSize = (UINT16) sizeof (EFI_SEC_PEI_HAND_OFF);\r | |
122 | SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;\r | |
123 | SecCoreData.BootFirmwareVolumeSize = (UINTN)(0x100000000ULL - (UINTN) BootFirmwareVolume);\r | |
124 | SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;\r | |
125 | SecCoreData.TemporaryRamSize = SizeOfRam;\r | |
126 | SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;\r | |
127 | SecCoreData.PeiTemporaryRamSize = SizeOfRam - PeiStackSize;\r | |
128 | SecCoreData.StackBase = (VOID*)(UINTN)(TempRamBase + SecCoreData.PeiTemporaryRamSize);\r | |
129 | SecCoreData.StackSize = PeiStackSize;\r | |
130 | \r | |
131 | //\r | |
132 | // Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.\r | |
133 | //\r | |
134 | InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);\r | |
135 | \r | |
136 | }\r | |
137 | \r | |
138 | /**\r | |
139 | Caller provided function to be invoked at the end of InitializeDebugAgent().\r | |
140 | \r | |
141 | Entry point to the C language phase of SEC. After the SEC assembly\r | |
142 | code has initialized some temporary memory and set up the stack,\r | |
143 | the control is transferred to this function.\r | |
144 | \r | |
145 | @param[in] Context The first input parameter of InitializeDebugAgent().\r | |
146 | \r | |
147 | **/\r | |
148 | VOID\r | |
149 | EFIAPI\r | |
150 | SecStartupPhase2(\r | |
151 | IN VOID *Context\r | |
152 | )\r | |
153 | {\r | |
154 | EFI_SEC_PEI_HAND_OFF *SecCoreData;\r | |
155 | EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;\r | |
156 | \r | |
157 | SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;\r | |
158 | //\r | |
159 | // Find Pei Core entry point. It will report SEC and Pei Core debug information if remote debug\r | |
160 | // is enabled.\r | |
161 | //\r | |
162 | FindAndReportEntryPoints ((EFI_FIRMWARE_VOLUME_HEADER *) SecCoreData->BootFirmwareVolumeBase, &PeiCoreEntryPoint);\r | |
163 | if (PeiCoreEntryPoint == NULL)\r | |
164 | {\r | |
165 | CpuDeadLoop ();\r | |
166 | }\r | |
167 | \r | |
168 | //\r | |
169 | // Transfer the control to the PEI core\r | |
170 | //\r | |
171 | ASSERT (PeiCoreEntryPoint != NULL);\r | |
172 | (*PeiCoreEntryPoint) (SecCoreData, (EFI_PEI_PPI_DESCRIPTOR *)&mPeiSecPlatformInformationPpi);\r | |
173 | \r | |
174 | //\r | |
175 | // Should not come here.\r | |
176 | //\r | |
177 | return ;\r | |
178 | }\r | |
179 | \r | |
180 | /**\r | |
181 | This service of the TEMPORARY_RAM_SUPPORT_PPI that migrates temporary RAM into\r | |
182 | permanent memory.\r | |
183 | \r | |
184 | @param PeiServices Pointer to the PEI Services Table.\r | |
185 | @param TemporaryMemoryBase Source Address in temporary memory from which the SEC or PEIM will copy the\r | |
186 | Temporary RAM contents.\r | |
187 | @param PermanentMemoryBase Destination Address in permanent memory into which the SEC or PEIM will copy the\r | |
188 | Temporary RAM contents.\r | |
189 | @param CopySize Amount of memory to migrate from temporary to permanent memory.\r | |
190 | \r | |
191 | @retval EFI_SUCCESS The data was successfully returned.\r | |
192 | @retval EFI_INVALID_PARAMETER PermanentMemoryBase + CopySize > TemporaryMemoryBase when\r | |
193 | TemporaryMemoryBase > PermanentMemoryBase.\r | |
194 | \r | |
195 | **/\r | |
196 | EFI_STATUS\r | |
197 | EFIAPI\r | |
198 | SecTemporaryRamSupport (\r | |
199 | IN CONST EFI_PEI_SERVICES **PeiServices,\r | |
200 | IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,\r | |
201 | IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,\r | |
202 | IN UINTN CopySize\r | |
203 | )\r | |
204 | {\r | |
205 | IA32_DESCRIPTOR IdtDescriptor;\r | |
206 | VOID* OldHeap;\r | |
207 | VOID* NewHeap;\r | |
208 | VOID* OldStack;\r | |
209 | VOID* NewStack;\r | |
210 | DEBUG_AGENT_CONTEXT_POSTMEM_SEC DebugAgentContext;\r | |
211 | BOOLEAN OldStatus;\r | |
212 | UINTN PeiStackSize;\r | |
213 | \r | |
214 | PeiStackSize = (CopySize >> 1);\r | |
215 | \r | |
216 | ASSERT (PeiStackSize < CopySize);\r | |
217 | \r | |
218 | //\r | |
219 | // |-------------------|---->\r | |
220 | // | Stack | PeiStackSize\r | |
221 | // |-------------------|---->\r | |
222 | // | Heap | PeiTemporayRamSize\r | |
223 | // |-------------------|----> TempRamBase\r | |
224 | //\r | |
225 | // |-------------------|---->\r | |
226 | // | Heap | PeiTemporayRamSize\r | |
227 | // |-------------------|---->\r | |
228 | // | Stack | PeiStackSize\r | |
229 | // |-------------------|----> PermanentMemoryBase\r | |
230 | //\r | |
231 | \r | |
232 | OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r | |
233 | NewHeap = (VOID*)((UINTN)PermanentMemoryBase + PeiStackSize);\r | |
234 | \r | |
235 | OldStack = (VOID*)((UINTN)TemporaryMemoryBase + CopySize - PeiStackSize);\r | |
236 | NewStack = (VOID*)(UINTN)PermanentMemoryBase;\r | |
237 | \r | |
238 | DebugAgentContext.HeapMigrateOffset = (UINTN)NewHeap - (UINTN)OldHeap;\r | |
239 | DebugAgentContext.StackMigrateOffset = (UINTN)NewStack - (UINTN)OldStack;\r | |
240 | \r | |
241 | OldStatus = SaveAndSetDebugTimerInterrupt (FALSE);\r | |
242 | //\r | |
243 | // Initialize Debug Agent to support source level debug in PEI phase after memory ready.\r | |
244 | // It will build HOB and fix up the pointer in IDT table.\r | |
245 | //\r | |
246 | InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, (VOID *) &DebugAgentContext, NULL);\r | |
247 | \r | |
248 | //\r | |
249 | // Migrate Heap\r | |
250 | //\r | |
251 | CopyMem (NewHeap, OldHeap, CopySize - PeiStackSize);\r | |
252 | \r | |
253 | //\r | |
254 | // Migrate Stack\r | |
255 | //\r | |
256 | CopyMem (NewStack, OldStack, PeiStackSize);\r | |
257 | \r | |
258 | \r | |
259 | //\r | |
260 | // We need *not* fix the return address because currently,\r | |
261 | // The PeiCore is executed in flash.\r | |
262 | //\r | |
263 | \r | |
264 | //\r | |
265 | // Rebase IDT table in permanent memory\r | |
266 | //\r | |
267 | AsmReadIdtr (&IdtDescriptor);\r | |
268 | IdtDescriptor.Base = IdtDescriptor.Base - (UINTN)OldStack + (UINTN)NewStack;\r | |
269 | \r | |
270 | AsmWriteIdtr (&IdtDescriptor);\r | |
271 | \r | |
272 | \r | |
273 | //\r | |
274 | // Program MTRR\r | |
275 | //\r | |
276 | \r | |
277 | //\r | |
278 | // SecSwitchStack function must be invoked after the memory migration\r | |
279 | // immediatly, also we need fixup the stack change caused by new call into\r | |
280 | // permenent memory.\r | |
281 | //\r | |
282 | SecSwitchStack (\r | |
283 | (UINT32) (UINTN) OldStack,\r | |
284 | (UINT32) (UINTN) NewStack\r | |
285 | );\r | |
286 | \r | |
287 | SaveAndSetDebugTimerInterrupt (OldStatus);\r | |
288 | \r | |
289 | return EFI_SUCCESS;\r | |
290 | }\r | |
291 | \r |