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
|
/** @file
Copyright (c) 2006 - 2011, 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.
Module Name:
DxeInit.c
Abstract:
Revision History:
**/
#include "DxeIpl.h"
#include "LegacyTable.h"
#include "HobGeneration.h"
#include "PpisNeededByDxeCore.h"
#include "Debug.h"
/*
--------------------------------------------------------
Memory Map: (XX=32,64)
--------------------------------------------------------
0x0
IVT
0x400
BDA
0x500
0x7C00
BootSector
0x10000
EfiLdr (relocate by efiXX.COM)
0x15000
Efivar.bin (Load by StartXX.COM)
0x20000
StartXX.COM (E820 table, Temporary GDT, Temporary IDT)
0x21000
EfiXX.COM (Temporary Interrupt Handler)
0x22000
EfiLdr.efi + DxeIpl.Z + DxeMain.Z + BFV.Z
0x86000
MemoryFreeUnder1M (For legacy driver DMA)
0x90000
Temporary 4G PageTable for X64 (6 page)
0x9F800
EBDA
0xA0000
VGA
0xC0000
OPROM
0xE0000
FIRMEWARE
0x100000 (1M)
Temporary Stack (1M)
0x200000
MemoryAbove1MB.PhysicalStart <-----------------------------------------------------+
... |
... |
<- Phit.EfiMemoryBottom -------------------+ |
HOB | |
<- Phit.EfiFreeMemoryBottom | |
| MemoryFreeAbove1MB.ResourceLength
<- Phit.EfiFreeMemoryTop ------+ | |
MemoryDescriptor (For ACPINVS, ACPIReclaim) | 4M = CONSUMED_MEMORY |
| | |
Permament 4G PageTable for IA32 or MemoryAllocation | |
Permament 64G PageTable for X64 | | |
<------------------------------+ | |
Permament Stack (0x20 Pages = 128K) | |
<- Phit.EfiMemoryTop ----------+-----------+---------------+
NvFV (64K) |
MMIO
FtwFV (128K) |
<----------------------------------------------------------+<---------+
DxeCore | |
DxeCore |
DxeIpl | Allocated in EfiLdr
<----------------------------------------------------------+ |
BFV MMIO |
<- Top of Free Memory reported by E820 --------------------+<---------+
ACPINVS or
ACPIReclaim or
Reserved
<- Memory Top on RealMemory
0x100000000 (4G)
MemoryFreeAbove4G.Physicalstart <--------------------------------------------------+
|
|
MemoryFreeAbove4GB.ResourceLength
|
|
<--------------------------------------------------+
*/
VOID
EnterDxeMain (
IN VOID *StackTop,
IN VOID *DxeCoreEntryPoint,
IN VOID *Hob,
IN VOID *PageTable
);
VOID
DxeInit (
IN EFILDRHANDOFF *Handoff
)
/*++
Routine Description:
This is the entry point after this code has been loaded into memory.
Arguments:
Returns:
Calls into EFI Firmware
--*/
{
VOID *StackTop;
VOID *StackBottom;
VOID *PageTableBase;
VOID *MemoryTopOnDescriptor;
VOID *MemoryDescriptor;
VOID *NvStorageBase;
EFILDRHANDOFF HandoffCopy;
CopyMem ((VOID*) &HandoffCopy, (VOID*) Handoff, sizeof (EFILDRHANDOFF));
Handoff = &HandoffCopy;
ClearScreen();
PrintString (
"Enter DxeIpl ...\n"
"Handoff:\n"
"Handoff.BfvBase = %p, BfvLength = %x\n"
"Handoff.DxeIplImageBase = %p, DxeIplImageSize = %x\n"
"Handoff.DxeCoreImageBase = %p, DxeCoreImageSize = %x\n",
Handoff->BfvBase, Handoff->BfvSize,
Handoff->DxeIplImageBase, Handoff->DxeIplImageSize,
Handoff->DxeCoreImageBase, Handoff->DxeCoreImageSize
);
//
// Hob Generation Guild line:
// * Don't report FV as physical memory
// * MemoryAllocation Hob should only cover physical memory
// * Use ResourceDescriptor Hob to report physical memory or Firmware Device and they shouldn't be overlapped
PrintString ("Prepare Cpu HOB information ...\n");
PrepareHobCpu ();
//
// 1. BFV
//
PrintString ("Prepare BFV HOB information ...\n");
PrepareHobBfv (Handoff->BfvBase, Handoff->BfvSize);
//
// 2. Updates Memory information, and get the top free address under 4GB
//
PrintString ("Prepare Memory HOB information ...\n");
MemoryTopOnDescriptor = PrepareHobMemory (Handoff->MemDescCount, Handoff->MemDesc);
//
// 3. Put [NV], [Stack], [PageTable], [MemDesc], [HOB] just below the [top free address under 4GB]
//
// 3.1 NV data
PrintString ("Prepare NV Storage information ...\n");
NvStorageBase = PrepareHobNvStorage (MemoryTopOnDescriptor);
PrintString ("NV Storage Base = %p\n", NvStorageBase);
// 3.2 Stack
StackTop = NvStorageBase;
StackBottom = PrepareHobStack (StackTop);
PrintString ("Stack Top=0x%x, Stack Bottom=0x%x\n", StackTop, StackBottom);
// 3.3 Page Table
PageTableBase = PreparePageTable (StackBottom, gHob->Cpu.SizeOfMemorySpace);
// 3.4 MemDesc (will be used in PlatformBds)
MemoryDescriptor = PrepareHobMemoryDescriptor (PageTableBase, Handoff->MemDescCount, Handoff->MemDesc);
// 3.5 Copy the Hob itself to EfiMemoryBottom, and update the PHIT Hob
PrepareHobPhit (StackTop, MemoryDescriptor);
//
// 4. Register the memory occupied by DxeCore and DxeIpl together as DxeCore
//
PrintString ("Prepare DxeCore memory Hob ...\n");
PrepareHobDxeCore (
Handoff->DxeCoreEntryPoint,
(EFI_PHYSICAL_ADDRESS)(UINTN)Handoff->DxeCoreImageBase,
(UINTN)Handoff->DxeIplImageBase + (UINTN)Handoff->DxeIplImageSize - (UINTN)Handoff->DxeCoreImageBase
);
PrepareHobLegacyTable (gHob);
PreparePpisNeededByDxeCore (gHob);
CompleteHobGeneration ();
//
// Print Hob Info
//
ClearScreen();
PrintString (
"HobStart = %p\n"
"Memory Top = %lx, Bottom = %lx\n"
"Free Memory Top = %lx, Bottom = %lx\n"
"NvStorageFvb = %lx, Length = %lx\n"
"BfvResource = %lx, Length = %lx\n"
"NvStorageFvResource = %lx, Length = %lx\n"
"NvStorage = %lx, Length = %lx\n"
"NvFtwFvResource = %lx, Length = %lx\n"
"NvFtwWorking = %lx, Length = %lx\n"
"NvFtwSpare = %lx, Length = %lx\n"
"Stack = %lx, StackLength = %lx\n"
"PageTable = %p\n"
"MemoryFreeUnder1MB = %lx, MemoryFreeUnder1MBLength = %lx\n"
"MemoryAbove1MB = %lx, MemoryAbove1MBLength = %lx\n"
"MemoryAbove4GB = %lx, MemoryAbove4GBLength = %lx\n"
"DxeCore = %lx, DxeCoreLength = %lx\n"
"MemoryAllocation = %lx, MemoryLength = %lx\n"
"$",
gHob,
gHob->Phit.EfiMemoryTop, gHob->Phit.EfiMemoryBottom,
gHob->Phit.EfiFreeMemoryTop, gHob->Phit.EfiFreeMemoryBottom,
gHob->NvStorageFvb.FvbInfo.Entries[0].Base, gHob->NvFtwFvb.FvbInfo.Entries[0].Length,
gHob->BfvResource.PhysicalStart, gHob->BfvResource.ResourceLength,
gHob->NvStorageFvResource.PhysicalStart, gHob->NvStorageFvResource.ResourceLength,
gHob->NvStorage.FvbInfo.Entries[0].Base, gHob->NvStorage.FvbInfo.Entries[0].Length,
gHob->NvFtwFvResource.PhysicalStart, gHob->NvFtwFvResource.ResourceLength,
gHob->NvFtwWorking.FvbInfo.Entries[0].Base, gHob->NvFtwWorking.FvbInfo.Entries[0].Length,
gHob->NvFtwSpare.FvbInfo.Entries[0].Base, gHob->NvFtwSpare.FvbInfo.Entries[0].Length,
gHob->Stack.AllocDescriptor.MemoryBaseAddress, gHob->Stack.AllocDescriptor.MemoryLength,
PageTableBase,
gHob->MemoryFreeUnder1MB.PhysicalStart, gHob->MemoryFreeUnder1MB.ResourceLength,
gHob->MemoryAbove1MB.PhysicalStart, gHob->MemoryAbove1MB.ResourceLength,
gHob->MemoryAbove4GB.PhysicalStart, gHob->MemoryAbove4GB.ResourceLength,
gHob->DxeCore.MemoryAllocationHeader.MemoryBaseAddress, gHob->DxeCore.MemoryAllocationHeader.MemoryLength,
gHob->MemoryAllocation.AllocDescriptor.MemoryBaseAddress, gHob->MemoryAllocation.AllocDescriptor.MemoryLength
);
ClearScreen();
PrintString (
"\n\n\n\n\n\n\n\n\n\n"
" WELCOME TO EFI WORLD!\n"
);
EnterDxeMain (StackTop, Handoff->DxeCoreEntryPoint, gHob, PageTableBase);
PrintString ("Fail to enter DXE main!\n");
//
// Should never get here
//
CpuDeadLoop ();
}
EFI_STATUS
EFIAPI
_ModuleEntryPoint (
IN EFILDRHANDOFF *Handoff
)
{
DxeInit(Handoff);
return EFI_SUCCESS;
}
|
