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
|
/*++
Copyright (c) 2006, Intel Corporation
All rights reserved. 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.
Module Name:
PeiMain.c
Abstract:
Pei Core Main Entry Point
Revision History
--*/
#include <PeiMain.h>
//
//CAR is filled with this initial value during SEC phase
//
#define INIT_CAR_VALUE 0x5AA55AA5
static EFI_PEI_PPI_DESCRIPTOR mMemoryDiscoveredPpi = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiMemoryDiscoveredPpiGuid,
NULL
};
//
// Pei Core Module Variables
//
//
static EFI_PEI_SERVICES mPS = {
{
PEI_SERVICES_SIGNATURE,
PEI_SERVICES_REVISION,
sizeof (EFI_PEI_SERVICES),
0,
0
},
PeiInstallPpi,
PeiReInstallPpi,
PeiLocatePpi,
PeiNotifyPpi,
PeiGetBootMode,
PeiSetBootMode,
PeiGetHobList,
PeiCreateHob,
PeiFvFindNextVolume,
PeiFfsFindNextFile,
PeiFfsFindSectionData,
PeiInstallPeiMemory,
PeiAllocatePages,
PeiAllocatePool,
(EFI_PEI_COPY_MEM)CopyMem,
(EFI_PEI_SET_MEM)SetMem,
PeiReportStatusCode,
PeiResetSystem,
NULL,
NULL,
NULL,
NULL,
NULL,
PeiRegisterForShadow
};
EFI_STATUS
EFIAPI
PeiCore (
IN EFI_PEI_STARTUP_DESCRIPTOR *PeiStartupDescriptor,
IN VOID *Data
)
/*++
Routine Description:
The entry routine to Pei Core, invoked by PeiMain during transition
from SEC to PEI. After switching stack in the PEI core, it will restart
with the old core data.
Arguments:
PeiStartupDescriptor - Information and services provided by SEC phase.
OldCoreData - Pointer to old core data that is used to initialize the
core's data areas.
Returns:
This function never returns
EFI_NOT_FOUND - Never reach
--*/
{
PEI_CORE_INSTANCE PrivateData;
EFI_STATUS Status;
PEI_CORE_TEMP_POINTERS TempPtr;
PEI_CORE_DISPATCH_DATA *DispatchData;
UINT64 mTick;
PEI_CORE_INSTANCE *OldCoreData;
mTick = 0;
OldCoreData = (PEI_CORE_INSTANCE *) Data;
if (PerformanceMeasurementEnabled()) {
if (OldCoreData == NULL) {
mTick = GetPerformanceCounter ();
}
}
//
// For IPF in CAR mode the real memory access is uncached,in InstallPeiMemory()
// the 63-bit of address is set to 1.
//
SWITCH_TO_CACHE_MODE (OldCoreData);
if (OldCoreData != NULL) {
CopyMem (&PrivateData, OldCoreData, sizeof (PEI_CORE_INSTANCE));
} else {
ZeroMem (&PrivateData, sizeof (PEI_CORE_INSTANCE));
}
PrivateData.Signature = PEI_CORE_HANDLE_SIGNATURE;
PrivateData.PS = &mPS;
//
// Initialize libraries that the PeiCore is linked against
// BUGBUG: The FfsHeader is passed in as NULL. Do we look it up or remove it from the lib init?
//
ProcessLibraryConstructorList (NULL, &PrivateData.PS);
InitializeMemoryServices (&PrivateData.PS, PeiStartupDescriptor, OldCoreData);
InitializePpiServices (&PrivateData.PS, OldCoreData);
InitializeSecurityServices (&PrivateData.PS, OldCoreData);
InitializeDispatcherData (&PrivateData.PS, OldCoreData, PeiStartupDescriptor);
if (OldCoreData != NULL) {
PERF_END (NULL,"PreMem", NULL, 0);
PERF_START (NULL,"PostMem", NULL, 0);
//
// The following code dumps out interesting cache as RAM usage information
// so we can keep tabs on how the cache as RAM is being utilized. The
// DEBUG_CODE_BEGIN macro is used to prevent this code from being compiled
// on a debug build.
//
DEBUG_CODE_BEGIN ();
UINTN *StackPointer;
UINTN StackValue;
StackValue = INIT_CAR_VALUE;
for (StackPointer = (UINTN *) OldCoreData->MaxTopOfCarHeap;
((UINTN) StackPointer < ((UINTN) OldCoreData->BottomOfCarHeap + OldCoreData->SizeOfCacheAsRam))
&& StackValue == INIT_CAR_VALUE;
StackPointer++) {
StackValue = *StackPointer;
}
DEBUG ((EFI_D_INFO, "Total Cache as RAM: %d bytes.\n", OldCoreData->SizeOfCacheAsRam));
DEBUG ((EFI_D_INFO, " CAR stack ever used: %d bytes.\n",
((UINTN) OldCoreData->TopOfCarHeap - (UINTN) StackPointer)
));
DEBUG ((EFI_D_INFO, " CAR heap used: %d bytes.\n",
((UINTN) OldCoreData->HobList.HandoffInformationTable->EfiFreeMemoryBottom -
(UINTN) OldCoreData->HobList.Raw)
));
DEBUG_CODE_END ();
//
// Alert any listeners that there is permanent memory available
//
PERF_START (NULL,"DisMem", NULL, 0);
Status = PeiServicesInstallPpi (&mMemoryDiscoveredPpi);
PERF_END (NULL,"DisMem", NULL, 0);
} else {
//
// Report Status Code EFI_SW_PC_INIT
//
REPORT_STATUS_CODE (
EFI_PROGRESS_CODE,
EFI_SOFTWARE_PEI_CORE | EFI_SW_PC_INIT
);
PERF_START (NULL,"PEI", NULL, mTick);
//
// If first pass, start performance measurement.
//
PERF_START (NULL,"PreMem", NULL, mTick);
//
// If SEC provided any PPI services to PEI, install them.
//
if (PeiStartupDescriptor->DispatchTable != NULL) {
Status = PeiServicesInstallPpi (PeiStartupDescriptor->DispatchTable);
ASSERT_EFI_ERROR (Status);
}
}
DispatchData = &PrivateData.DispatchData;
//
// Call PEIM dispatcher
//
PeiDispatcher (PeiStartupDescriptor, &PrivateData, DispatchData);
//
// Check if InstallPeiMemory service was called.
//
ASSERT(PrivateData.PeiMemoryInstalled == TRUE);
PERF_END (NULL, "PostMem", NULL, 0);
Status = PeiServicesLocatePpi (
&gEfiDxeIplPpiGuid,
0,
NULL,
(VOID **)&TempPtr.DxeIpl
);
ASSERT_EFI_ERROR (Status);
DEBUG ((EFI_D_INFO, "DXE IPL Entry\n"));
Status = TempPtr.DxeIpl->Entry (
TempPtr.DxeIpl,
&PrivateData.PS,
PrivateData.HobList
);
ASSERT_EFI_ERROR (Status);
return EFI_NOT_FOUND;
}
|