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
|
/** @file
Memory Detection for Virtual Machines.
Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
//
// The package level header files this module uses
//
#include <PiPei.h>
//
// The Library classes this module consumes
//
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/QemuFwCfgLib.h>
#include <Library/ResourcePublicationLib.h>
#include <Register/LoongArch64/Csr.h>
#include <Uefi/UefiSpec.h>
#include "Platform.h"
#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS (128)
#define LOONGARCH_FW_RAM_TOP BASE_256MB
/**
Publish PEI core memory
@return EFI_SUCCESS The PEIM initialized successfully.
**/
EFI_STATUS
PublishPeiMemory (
VOID
)
{
EFI_STATUS Status;
UINT64 Base;
UINT64 Size;
UINT64 RamTop;
FIRMWARE_CONFIG_ITEM FwCfgItem;
UINTN FwCfgSize;
UINTN Processed;
MEMMAP_ENTRY MemoryMapEntry;
//
// Determine the range of memory to use during PEI
//
Base = FixedPcdGet64 (PcdOvmfSecPeiTempRamBase) + FixedPcdGet32 (PcdOvmfSecPeiTempRamSize);
RamTop = 0;
Status = QemuFwCfgFindFile ("etc/memmap", &FwCfgItem, &FwCfgSize);
if (EFI_ERROR (Status)) {
return Status;
}
if (FwCfgSize % sizeof MemoryMapEntry != 0) {
return EFI_PROTOCOL_ERROR;
}
QemuFwCfgSelectItem (FwCfgItem);
for (Processed = 0; Processed < FwCfgSize; Processed += sizeof MemoryMapEntry) {
QemuFwCfgReadBytes (sizeof MemoryMapEntry, &MemoryMapEntry);
if (MemoryMapEntry.Type != EfiAcpiAddressRangeMemory) {
continue;
}
//
// Find memory map entry where PEI temp stack is located
//
if ((MemoryMapEntry.BaseAddr <= Base) &&
(Base < (MemoryMapEntry.BaseAddr + MemoryMapEntry.Length)))
{
RamTop = MemoryMapEntry.BaseAddr + MemoryMapEntry.Length;
break;
}
}
if (RamTop == 0) {
DEBUG ((DEBUG_ERROR, "ERROR: No memory map entry contains temp stack \n"));
ASSERT (FALSE);
}
Size = RamTop - Base;
//
// Publish this memory to the PEI Core
//
Status = PublishSystemMemory (Base, Size);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "Publish Memory Initialize done.\n"));
return Status;
}
/**
Peform Memory Detection
Publish system RAM and reserve memory regions
**/
VOID
InitializeRamRegions (
VOID
)
{
EFI_STATUS Status;
FIRMWARE_CONFIG_ITEM FwCfgItem;
UINTN FwCfgSize;
MEMMAP_ENTRY MemoryMapEntry;
MEMMAP_ENTRY *StartEntry;
MEMMAP_ENTRY *pEntry;
UINTN Processed;
Status = QemuFwCfgFindFile ("etc/memmap", &FwCfgItem, &FwCfgSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a %d read etc/memmap error Status %d \n", __func__, __LINE__, Status));
return;
}
if (FwCfgSize % sizeof MemoryMapEntry != 0) {
DEBUG ((DEBUG_ERROR, "no MemoryMapEntry FwCfgSize:%d\n", FwCfgSize));
return;
}
QemuFwCfgSelectItem (FwCfgItem);
StartEntry = AllocatePages (EFI_SIZE_TO_PAGES (FwCfgSize));
QemuFwCfgReadBytes (FwCfgSize, StartEntry);
for (Processed = 0; Processed < (FwCfgSize / sizeof MemoryMapEntry); Processed++) {
pEntry = StartEntry + Processed;
if (pEntry->Length == 0) {
continue;
}
DEBUG ((DEBUG_INFO, "MemmapEntry Base %p length %p type %d\n", pEntry->BaseAddr, pEntry->Length, pEntry->Type));
if (pEntry->Type != EfiAcpiAddressRangeMemory) {
continue;
}
AddMemoryRangeHob (pEntry->BaseAddr, pEntry->BaseAddr + pEntry->Length);
}
//
// When 0 address protection is enabled,
// 0-4k memory needs to be preallocated to prevent UEFI applications from allocating use,
// such as grub
//
if (PcdGet8 (PcdNullPointerDetectionPropertyMask) & BIT0) {
BuildMemoryAllocationHob (
0,
EFI_PAGE_SIZE,
EfiBootServicesData
);
}
}
/**
Gets the Virtual Memory Map of corresponding platforms.
This Virtual Memory Map is used by initialize the MMU on corresponding
platforms.
@param[out] MemoryTable Array of EFI_MEMORY_DESCRIPTOR
describing a Physical-to-Virtual Memory
mapping. This array must be ended by a
zero-filled entry. The allocated memory
will not be freed.
**/
VOID
EFIAPI
GetMemoryMapPolicy (
OUT EFI_MEMORY_DESCRIPTOR **MemoryTable
)
{
EFI_STATUS Status;
FIRMWARE_CONFIG_ITEM FwCfgItem;
UINTN FwCfgSize;
MEMMAP_ENTRY MemoryMapEntry;
MEMMAP_ENTRY *StartEntry;
MEMMAP_ENTRY *pEntry;
UINTN Processed;
EFI_MEMORY_DESCRIPTOR *VirtualMemoryTable;
UINTN Index = 0;
ASSERT (MemoryTable != NULL);
VirtualMemoryTable = AllocatePool (
sizeof (EFI_MEMORY_DESCRIPTOR) *
MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
);
//
// Add the 0x10000000-0x20000000. In the virtual machine, this area use for CPU UART, flash, PIC etc.
//
VirtualMemoryTable[Index].PhysicalStart = BASE_256MB;
VirtualMemoryTable[Index].VirtualStart = VirtualMemoryTable[Index].PhysicalStart;
VirtualMemoryTable[Index].NumberOfPages = EFI_SIZE_TO_PAGES (SIZE_256MB);
VirtualMemoryTable[Index].Attribute = EFI_MEMORY_UC;
++Index;
Status = QemuFwCfgFindFile ("etc/memmap", &FwCfgItem, &FwCfgSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a %d read etc/memmap error Status %d \n", __func__, __LINE__, Status));
ZeroMem (&VirtualMemoryTable[Index], sizeof (EFI_MEMORY_DESCRIPTOR));
*MemoryTable = VirtualMemoryTable;
return;
}
if (FwCfgSize % sizeof MemoryMapEntry != 0) {
DEBUG ((DEBUG_ERROR, "no MemoryMapEntry FwCfgSize:%d\n", FwCfgSize));
}
QemuFwCfgSelectItem (FwCfgItem);
StartEntry = AllocatePages (EFI_SIZE_TO_PAGES (FwCfgSize));
QemuFwCfgReadBytes (FwCfgSize, StartEntry);
for (Processed = 0; Processed < (FwCfgSize / sizeof MemoryMapEntry); Processed++) {
pEntry = StartEntry + Processed;
if (pEntry->Length == 0) {
continue;
}
DEBUG ((DEBUG_INFO, "MemmapEntry Base %p length %p type %d\n", pEntry->BaseAddr, pEntry->Length, pEntry->Type));
VirtualMemoryTable[Index].PhysicalStart = pEntry->BaseAddr;
VirtualMemoryTable[Index].VirtualStart = VirtualMemoryTable[Index].PhysicalStart;
VirtualMemoryTable[Index].NumberOfPages = EFI_SIZE_TO_PAGES (pEntry->Length);
VirtualMemoryTable[Index].Attribute = EFI_MEMORY_WB;
++Index;
}
FreePages (StartEntry, EFI_SIZE_TO_PAGES (FwCfgSize));
// End of Table
ZeroMem (&VirtualMemoryTable[Index], sizeof (EFI_MEMORY_DESCRIPTOR));
*MemoryTable = VirtualMemoryTable;
}
|
