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
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
|
/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <amdblocks/agesawrapper.h>
#include <amdlib.h>
#include <arch/acpi.h>
#include <amdblocks/BiosCallOuts.h>
#include <cbmem.h>
#include <string.h>
static void *GetHeapBase(void)
{
struct cbmem_usage *heap;
heap = (struct cbmem_usage *)cbmem_add(CBMEM_ID_RESUME_SCRATCH,
sizeof(struct cbmem_usage));
return &heap->heap_base;
}
static void EmptyHeap(int unused)
{
void *BiosManagerPtr = GetHeapBase();
memset(BiosManagerPtr, 0, BIOS_HEAP_SIZE);
}
#if IS_ENABLED(CONFIG_LATE_CBMEM_INIT)
#error "Only EARLY_CBMEM_INIT is supported."
#endif
ROMSTAGE_CBMEM_INIT_HOOK(EmptyHeap)
AGESA_STATUS agesa_AllocateBuffer (UINT32 Func, UINTN Data, VOID *ConfigPtr)
{
UINT32 AvailableHeapSize;
UINT8 *BiosHeapBaseAddr;
UINT32 CurrNodeOffset;
UINT32 PrevNodeOffset;
UINT32 FreedNodeOffset;
UINT32 BestFitNodeOffset;
UINT32 BestFitPrevNodeOffset;
UINT32 NextFreeOffset;
BIOS_BUFFER_NODE *CurrNodePtr;
BIOS_BUFFER_NODE *FreedNodePtr;
BIOS_BUFFER_NODE *BestFitNodePtr;
BIOS_BUFFER_NODE *BestFitPrevNodePtr;
BIOS_BUFFER_NODE *NextFreePtr;
BIOS_HEAP_MANAGER *BiosHeapBasePtr;
AGESA_BUFFER_PARAMS *AllocParams;
AllocParams = ((AGESA_BUFFER_PARAMS *)ConfigPtr);
AllocParams->BufferPointer = NULL;
AvailableHeapSize = BIOS_HEAP_SIZE - sizeof(BIOS_HEAP_MANAGER);
BiosHeapBaseAddr = GetHeapBase();
BiosHeapBasePtr = (BIOS_HEAP_MANAGER *)BiosHeapBaseAddr;
if (BiosHeapBasePtr->StartOfAllocatedNodes == 0) {
/* First allocation */
CurrNodeOffset = sizeof(BIOS_HEAP_MANAGER);
CurrNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ CurrNodeOffset);
CurrNodePtr->BufferHandle = AllocParams->BufferHandle;
CurrNodePtr->BufferSize = AllocParams->BufferLength;
CurrNodePtr->NextNodeOffset = 0;
AllocParams->BufferPointer = (UINT8 *)CurrNodePtr
+ sizeof(BIOS_BUFFER_NODE);
/* Update the remaining free space */
FreedNodeOffset = CurrNodeOffset + CurrNodePtr->BufferSize
+ sizeof(BIOS_BUFFER_NODE);
FreedNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ FreedNodeOffset);
FreedNodePtr->BufferSize = AvailableHeapSize
- (FreedNodeOffset - CurrNodeOffset)
- sizeof(BIOS_BUFFER_NODE);
FreedNodePtr->NextNodeOffset = 0;
/* Update the offsets for Allocated and Freed nodes */
BiosHeapBasePtr->StartOfAllocatedNodes = CurrNodeOffset;
BiosHeapBasePtr->StartOfFreedNodes = FreedNodeOffset;
} else {
/* Find out whether BufferHandle has been allocated on the heap.
* If it has, return AGESA_BOUNDS_CHK.
*/
CurrNodeOffset = BiosHeapBasePtr->StartOfAllocatedNodes;
CurrNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ CurrNodeOffset);
while (CurrNodeOffset != 0) {
CurrNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ CurrNodeOffset);
if (CurrNodePtr->BufferHandle ==
AllocParams->BufferHandle) {
return AGESA_BOUNDS_CHK;
}
CurrNodeOffset = CurrNodePtr->NextNodeOffset;
/* If BufferHandle has not been allocated on the heap,
* CurrNodePtr here points to the end of the allocated
* nodes list.
*/
}
/* Find the node that best fits the requested buffer size */
FreedNodeOffset = BiosHeapBasePtr->StartOfFreedNodes;
PrevNodeOffset = FreedNodeOffset;
BestFitNodeOffset = 0;
BestFitPrevNodeOffset = 0;
while (FreedNodeOffset != 0) { /* todo: simplify this */
FreedNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ FreedNodeOffset);
if (FreedNodePtr->BufferSize >=
(AllocParams->BufferLength +
sizeof(BIOS_BUFFER_NODE))) {
if (BestFitNodeOffset == 0) {
/*
* First node that fits the requested
* buffer size
*/
BestFitNodeOffset = FreedNodeOffset;
BestFitPrevNodeOffset = PrevNodeOffset;
} else {
/*
* Find out whether current node is a
* betterfit than the previous nodes
*/
BestFitNodePtr = (BIOS_BUFFER_NODE *)
(BiosHeapBaseAddr +
BestFitNodeOffset);
if (BestFitNodePtr->BufferSize >
FreedNodePtr->BufferSize) {
BestFitNodeOffset =
FreedNodeOffset;
BestFitPrevNodeOffset =
PrevNodeOffset;
}
}
}
PrevNodeOffset = FreedNodeOffset;
FreedNodeOffset = FreedNodePtr->NextNodeOffset;
} /* end of while loop */
if (BestFitNodeOffset == 0) {
/*
* If we could not find a node that fits the requested
* buffer size, return AGESA_BOUNDS_CHK.
*/
return AGESA_BOUNDS_CHK;
}
BestFitNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ BestFitNodeOffset);
BestFitPrevNodePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr +
BestFitPrevNodeOffset);
/*
* If BestFitNode is larger than the requested buffer,
* fragment the node further
*/
if (BestFitNodePtr->BufferSize >
(AllocParams->BufferLength + sizeof(BIOS_BUFFER_NODE))) {
NextFreeOffset = BestFitNodeOffset +
AllocParams->BufferLength +
sizeof(BIOS_BUFFER_NODE);
NextFreePtr = (BIOS_BUFFER_NODE *) (BiosHeapBaseAddr +
NextFreeOffset);
NextFreePtr->BufferSize = BestFitNodePtr->BufferSize -
(AllocParams->BufferLength +
sizeof(BIOS_BUFFER_NODE));
NextFreePtr->NextNodeOffset =
BestFitNodePtr->NextNodeOffset;
} else {
/*
* Otherwise, next free node is
* NextNodeOffset of BestFitNode
*/
NextFreeOffset = BestFitNodePtr->NextNodeOffset;
}
/*
* If BestFitNode is the first buffer in the list, then
* update StartOfFreedNodes to reflect new free node.
*/
if (BestFitNodeOffset == BiosHeapBasePtr->StartOfFreedNodes)
BiosHeapBasePtr->StartOfFreedNodes = NextFreeOffset;
else
BestFitPrevNodePtr->NextNodeOffset = NextFreeOffset;
/* Add BestFitNode to the list of Allocated nodes */
CurrNodePtr->NextNodeOffset = BestFitNodeOffset;
BestFitNodePtr->BufferSize = AllocParams->BufferLength;
BestFitNodePtr->BufferHandle = AllocParams->BufferHandle;
BestFitNodePtr->NextNodeOffset = 0;
/* Remove BestFitNode from list of Freed nodes */
AllocParams->BufferPointer = (UINT8 *)BestFitNodePtr +
sizeof(BIOS_BUFFER_NODE);
}
return AGESA_SUCCESS;
}
AGESA_STATUS agesa_DeallocateBuffer (UINT32 Func, UINTN Data, VOID *ConfigPtr)
{
UINT8 *BiosHeapBaseAddr;
UINT32 AllocNodeOffset;
UINT32 PrevNodeOffset;
UINT32 NextNodeOffset;
UINT32 FreedNodeOffset;
UINT32 EndNodeOffset;
BIOS_BUFFER_NODE *AllocNodePtr;
BIOS_BUFFER_NODE *PrevNodePtr;
BIOS_BUFFER_NODE *FreedNodePtr;
BIOS_BUFFER_NODE *NextNodePtr;
BIOS_HEAP_MANAGER *BiosHeapBasePtr;
AGESA_BUFFER_PARAMS *AllocParams;
AllocParams = (AGESA_BUFFER_PARAMS *)ConfigPtr;
BiosHeapBaseAddr = GetHeapBase();
BiosHeapBasePtr = (BIOS_HEAP_MANAGER *)BiosHeapBaseAddr;
/* Find target node to deallocate in list of allocated nodes.
* Return AGESA_BOUNDS_CHK if the BufferHandle is not found.
*/
AllocNodeOffset = BiosHeapBasePtr->StartOfAllocatedNodes;
AllocNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr + AllocNodeOffset);
PrevNodeOffset = AllocNodeOffset;
while (AllocNodePtr->BufferHandle != AllocParams->BufferHandle) {
if (AllocNodePtr->NextNodeOffset == 0)
return AGESA_BOUNDS_CHK;
PrevNodeOffset = AllocNodeOffset;
AllocNodeOffset = AllocNodePtr->NextNodeOffset;
AllocNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ AllocNodeOffset);
}
/* Remove target node from list of allocated nodes */
PrevNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr + PrevNodeOffset);
PrevNodePtr->NextNodeOffset = AllocNodePtr->NextNodeOffset;
/* Zero out the buffer, and clear the BufferHandle */
memset((UINT8 *)AllocNodePtr + sizeof(BIOS_BUFFER_NODE), 0,
AllocNodePtr->BufferSize);
AllocNodePtr->BufferHandle = 0;
/* Add deallocated node in order to the list of freed nodes */
FreedNodeOffset = BiosHeapBasePtr->StartOfFreedNodes;
FreedNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr + FreedNodeOffset);
EndNodeOffset = AllocNodeOffset + AllocNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
if (AllocNodeOffset < FreedNodeOffset) {
/* Add to the start of the freed list */
if (EndNodeOffset == FreedNodeOffset) {
/* If the freed node is adjacent to the first node in
* the list, concatenate both nodes
*/
AllocNodePtr->BufferSize += FreedNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
AllocNodePtr->NextNodeOffset =
FreedNodePtr->NextNodeOffset;
/* Zero out the FreedNode header */
memset((UINT8 *)FreedNodePtr, 0,
sizeof(BIOS_BUFFER_NODE));
} else {
/* Otherwise, add freed node to the start of the list
* Update NextNodeOffset and BufferSize to include the
* size of BIOS_BUFFER_NODE.
*/
AllocNodePtr->NextNodeOffset = FreedNodeOffset;
}
/* Update StartOfFreedNodes to the new first node */
BiosHeapBasePtr->StartOfFreedNodes = AllocNodeOffset;
} else {
/* Traverse list of freed nodes to find where the deallocated
* node should be placed.
*/
NextNodeOffset = FreedNodeOffset;
NextNodePtr = FreedNodePtr;
while (AllocNodeOffset > NextNodeOffset) {
PrevNodeOffset = NextNodeOffset;
if (NextNodePtr->NextNodeOffset == 0)
break;
NextNodeOffset = NextNodePtr->NextNodeOffset;
NextNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ NextNodeOffset);
}
/* If deallocated node is adjacent to the next node,
* concatenate both nodes.
*/
if (NextNodeOffset == EndNodeOffset) {
NextNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ NextNodeOffset);
AllocNodePtr->BufferSize += NextNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
AllocNodePtr->NextNodeOffset =
NextNodePtr->NextNodeOffset;
/* Zero out the NextNode header */
memset((UINT8 *)NextNodePtr, 0,
sizeof(BIOS_BUFFER_NODE));
} else {
/*AllocNodePtr->NextNodeOffset =
* FreedNodePtr->NextNodeOffset; */
AllocNodePtr->NextNodeOffset = NextNodeOffset;
}
/*
* If deallocated node is adjacent to the previous node,
* concatenate both nodes.
*/
PrevNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr
+ PrevNodeOffset);
EndNodeOffset = PrevNodeOffset + PrevNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
if (AllocNodeOffset == EndNodeOffset) {
PrevNodePtr->NextNodeOffset =
AllocNodePtr->NextNodeOffset;
PrevNodePtr->BufferSize += AllocNodePtr->BufferSize +
sizeof(BIOS_BUFFER_NODE);
/* Zero out the AllocNode header */
memset((UINT8 *)AllocNodePtr, 0,
sizeof(BIOS_BUFFER_NODE));
} else {
PrevNodePtr->NextNodeOffset = AllocNodeOffset;
}
}
return AGESA_SUCCESS;
}
AGESA_STATUS agesa_LocateBuffer (UINT32 Func, UINTN Data, VOID *ConfigPtr)
{
UINT32 AllocNodeOffset;
UINT8 *BiosHeapBaseAddr;
BIOS_BUFFER_NODE *AllocNodePtr;
BIOS_HEAP_MANAGER *BiosHeapBasePtr;
AGESA_BUFFER_PARAMS *AllocParams;
AllocParams = (AGESA_BUFFER_PARAMS *)ConfigPtr;
BiosHeapBaseAddr = GetHeapBase();
BiosHeapBasePtr = (BIOS_HEAP_MANAGER *)BiosHeapBaseAddr;
AllocNodeOffset = BiosHeapBasePtr->StartOfAllocatedNodes;
AllocNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr + AllocNodeOffset);
while (AllocParams->BufferHandle != AllocNodePtr->BufferHandle) {
if (AllocNodePtr->NextNodeOffset == 0) {
AllocParams->BufferPointer = NULL;
AllocParams->BufferLength = 0;
return AGESA_BOUNDS_CHK;
}
AllocNodeOffset = AllocNodePtr->NextNodeOffset;
AllocNodePtr = (BIOS_BUFFER_NODE *)(BiosHeapBaseAddr +
AllocNodeOffset);
}
AllocParams->BufferPointer = (UINT8 *)((UINT8 *)AllocNodePtr
+ sizeof(BIOS_BUFFER_NODE));
AllocParams->BufferLength = AllocNodePtr->BufferSize;
return AGESA_SUCCESS;
}
|