1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
|
/** @file
C functions in SEC
Copyright (c) 2008 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "SecMain.h"
EFI_PEI_TEMPORARY_RAM_DONE_PPI gSecTemporaryRamDonePpi = {
SecTemporaryRamDone
};
EFI_SEC_PLATFORM_INFORMATION_PPI mSecPlatformInformationPpi = { SecPlatformInformation };
EFI_PEI_PPI_DESCRIPTOR mPeiSecPlatformInformationPpi[] = {
{
//
// SecPerformance PPI notify descriptor.
//
EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK,
&gPeiSecPerformancePpiGuid,
(VOID *) (UINTN) SecPerformancePpiCallBack
},
{
EFI_PEI_PPI_DESCRIPTOR_PPI,
&gEfiTemporaryRamDonePpiGuid,
&gSecTemporaryRamDonePpi
},
{
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiSecPlatformInformationPpiGuid,
&mSecPlatformInformationPpi
}
};
//
// These are IDT entries pointing to 10:FFFFFFE4h.
//
UINT64 mIdtEntryTemplate = 0xffff8e000010ffe4ULL;
/**
Caller provided function to be invoked at the end of InitializeDebugAgent().
Entry point to the C language phase of SEC. After the SEC assembly
code has initialized some temporary memory and set up the stack,
the control is transferred to this function.
@param[in] Context The first input parameter of InitializeDebugAgent().
**/
VOID
NORETURN
EFIAPI
SecStartupPhase2(
IN VOID *Context
);
/**
Entry point of the notification callback function itself within the PEIM.
It is to get SEC performance data and build HOB to convey the SEC performance
data to DXE phase.
@param PeiServices Indirect reference to the PEI Services Table.
@param NotifyDescriptor Address of the notification descriptor data structure.
@param Ppi Address of the PPI that was installed.
@return Status of the notification.
The status code returned from this function is ignored.
**/
EFI_STATUS
EFIAPI
SecPerformancePpiCallBack (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
EFI_STATUS Status;
PEI_SEC_PERFORMANCE_PPI *SecPerf;
FIRMWARE_SEC_PERFORMANCE Performance;
SecPerf = (PEI_SEC_PERFORMANCE_PPI *) Ppi;
Status = SecPerf->GetPerformance ((CONST EFI_PEI_SERVICES **) PeiServices, SecPerf, &Performance);
if (!EFI_ERROR (Status)) {
BuildGuidDataHob (
&gEfiFirmwarePerformanceGuid,
&Performance,
sizeof (FIRMWARE_SEC_PERFORMANCE)
);
DEBUG ((DEBUG_INFO, "FPDT: SEC Performance Hob ResetEnd = %ld\n", Performance.ResetEnd));
}
return Status;
}
/**
Entry point to the C language phase of SEC. After the SEC assembly
code has initialized some temporary memory and set up the stack,
the control is transferred to this function.
@param SizeOfRam Size of the temporary memory available for use.
@param TempRamBase Base address of temporary ram
@param BootFirmwareVolume Base address of the Boot Firmware Volume.
**/
VOID
EFIAPI
SecStartup (
IN UINT32 SizeOfRam,
IN UINT32 TempRamBase,
IN VOID *BootFirmwareVolume
)
{
EFI_SEC_PEI_HAND_OFF SecCoreData;
IA32_DESCRIPTOR IdtDescriptor;
SEC_IDT_TABLE IdtTableInStack;
UINT32 Index;
UINT32 PeiStackSize;
EFI_STATUS Status;
//
// Report Status Code to indicate entering SEC core
//
REPORT_STATUS_CODE (
EFI_PROGRESS_CODE,
EFI_SOFTWARE_SEC | EFI_SW_SEC_PC_ENTRY_POINT
);
PeiStackSize = PcdGet32 (PcdPeiTemporaryRamStackSize);
if (PeiStackSize == 0) {
PeiStackSize = (SizeOfRam >> 1);
}
ASSERT (PeiStackSize < SizeOfRam);
//
// Process all libraries constructor function linked to SecCore.
//
ProcessLibraryConstructorList ();
//
// Initialize floating point operating environment
// to be compliant with UEFI spec.
//
InitializeFloatingPointUnits ();
// |-------------------|---->
// |IDT Table |
// |-------------------|
// |PeiService Pointer | PeiStackSize
// |-------------------|
// | |
// | Stack |
// |-------------------|---->
// | |
// | |
// | Heap | PeiTemporayRamSize
// | |
// | |
// |-------------------|----> TempRamBase
IdtTableInStack.PeiService = 0;
for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {
CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&mIdtEntryTemplate, sizeof (UINT64));
}
IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;
IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);
AsmWriteIdtr (&IdtDescriptor);
//
// Setup the default exception handlers
//
Status = InitializeCpuExceptionHandlers (NULL);
ASSERT_EFI_ERROR (Status);
//
// Update the base address and length of Pei temporary memory
//
SecCoreData.DataSize = (UINT16) sizeof (EFI_SEC_PEI_HAND_OFF);
SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;
SecCoreData.BootFirmwareVolumeSize = (UINTN)((EFI_FIRMWARE_VOLUME_HEADER *) BootFirmwareVolume)->FvLength;
SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;
SecCoreData.TemporaryRamSize = SizeOfRam;
SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;
SecCoreData.PeiTemporaryRamSize = SizeOfRam - PeiStackSize;
SecCoreData.StackBase = (VOID*)(UINTN)(TempRamBase + SecCoreData.PeiTemporaryRamSize);
SecCoreData.StackSize = PeiStackSize;
//
// Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.
//
InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);
}
/**
Caller provided function to be invoked at the end of InitializeDebugAgent().
Entry point to the C language phase of SEC. After the SEC assembly
code has initialized some temporary memory and set up the stack,
the control is transferred to this function.
@param[in] Context The first input parameter of InitializeDebugAgent().
**/
VOID
NORETURN
EFIAPI
SecStartupPhase2(
IN VOID *Context
)
{
EFI_SEC_PEI_HAND_OFF *SecCoreData;
EFI_PEI_PPI_DESCRIPTOR *PpiList;
UINT32 Index;
EFI_PEI_PPI_DESCRIPTOR *AllSecPpiList;
EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;
SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;
AllSecPpiList = (EFI_PEI_PPI_DESCRIPTOR *) SecCoreData->PeiTemporaryRamBase;
//
// Find Pei Core entry point. It will report SEC and Pei Core debug information if remote debug
// is enabled.
//
FindAndReportEntryPoints ((EFI_FIRMWARE_VOLUME_HEADER *) SecCoreData->BootFirmwareVolumeBase, &PeiCoreEntryPoint);
if (PeiCoreEntryPoint == NULL)
{
CpuDeadLoop ();
}
//
// Perform platform specific initialization before entering PeiCore.
//
PpiList = SecPlatformMain (SecCoreData);
if (PpiList != NULL) {
//
// Remove the terminal flag from the terminal PPI
//
CopyMem (AllSecPpiList, mPeiSecPlatformInformationPpi, sizeof (mPeiSecPlatformInformationPpi));
Index = sizeof (mPeiSecPlatformInformationPpi) / sizeof (EFI_PEI_PPI_DESCRIPTOR) - 1;
AllSecPpiList[Index].Flags = AllSecPpiList[Index].Flags & (~EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST);
//
// Append the platform additional PPI list
//
Index += 1;
while (((PpiList->Flags & EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) != EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST)) {
CopyMem (&AllSecPpiList[Index], PpiList, sizeof (EFI_PEI_PPI_DESCRIPTOR));
Index++;
PpiList++;
}
//
// Add the terminal PPI
//
CopyMem (&AllSecPpiList[Index ++], PpiList, sizeof (EFI_PEI_PPI_DESCRIPTOR));
//
// Set PpiList to the total PPI
//
PpiList = AllSecPpiList;
//
// Adjust PEI TEMP RAM Range.
//
ASSERT (SecCoreData->PeiTemporaryRamSize > Index * sizeof (EFI_PEI_PPI_DESCRIPTOR));
SecCoreData->PeiTemporaryRamBase = (VOID *)((UINTN) SecCoreData->PeiTemporaryRamBase + Index * sizeof (EFI_PEI_PPI_DESCRIPTOR));
SecCoreData->PeiTemporaryRamSize = SecCoreData->PeiTemporaryRamSize - Index * sizeof (EFI_PEI_PPI_DESCRIPTOR);
//
// Adjust the Base and Size to be 8-byte aligned as HOB which has 8byte aligned requirement
// will be built based on them in PEI phase.
//
SecCoreData->PeiTemporaryRamBase = (VOID *)(((UINTN)SecCoreData->PeiTemporaryRamBase + 7) & ~0x07);
SecCoreData->PeiTemporaryRamSize &= ~(UINTN)0x07;
} else {
//
// No addition PPI, PpiList directly point to the common PPI list.
//
PpiList = &mPeiSecPlatformInformationPpi[0];
}
DEBUG ((
DEBUG_INFO,
"%a() Stack Base: 0x%p, Stack Size: 0x%x\n",
__FUNCTION__,
SecCoreData->StackBase,
(UINT32) SecCoreData->StackSize
));
//
// Report Status Code to indicate transferring to PEI core
//
REPORT_STATUS_CODE (
EFI_PROGRESS_CODE,
EFI_SOFTWARE_SEC | EFI_SW_SEC_PC_HANDOFF_TO_NEXT
);
//
// Transfer the control to the PEI core
//
ASSERT (PeiCoreEntryPoint != NULL);
(*PeiCoreEntryPoint) (SecCoreData, PpiList);
//
// Should not come here.
//
UNREACHABLE ();
}
/**
TemporaryRamDone() disables the use of Temporary RAM. If present, this service is invoked
by the PEI Foundation after the EFI_PEI_PERMANANT_MEMORY_INSTALLED_PPI is installed.
@retval EFI_SUCCESS Use of Temporary RAM was disabled.
@retval EFI_INVALID_PARAMETER Temporary RAM could not be disabled.
**/
EFI_STATUS
EFIAPI
SecTemporaryRamDone (
VOID
)
{
BOOLEAN State;
//
// Republish Sec Platform Information(2) PPI
//
RepublishSecPlatformInformationPpi ();
//
// Migrate DebugAgentContext.
//
InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
//
// Disable interrupts and save current interrupt state
//
State = SaveAndDisableInterrupts();
//
// Disable Temporary RAM after Stack and Heap have been migrated at this point.
//
SecPlatformDisableTemporaryMemory ();
//
// Restore original interrupt state
//
SetInterruptState (State);
return EFI_SUCCESS;
}
|