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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | EhciMem.c\r | |
15 | \r | |
16 | Abstract: \r | |
17 | \r | |
18 | \r | |
19 | Revision History\r | |
20 | --*/\r | |
21 | \r | |
22 | #include "Ehci.h"\r | |
23 | \r | |
24 | \r | |
25 | EFI_STATUS\r | |
26 | CreateMemoryBlock (\r | |
27 | IN USB2_HC_DEV *HcDev,\r | |
28 | OUT MEMORY_MANAGE_HEADER **MemoryHeader,\r | |
29 | IN UINTN MemoryBlockSizeInPages\r | |
30 | )\r | |
31 | /*++\r | |
32 | \r | |
33 | Routine Description:\r | |
34 | \r | |
35 | Use PciIo->AllocateBuffer to allocate common buffer for the memory block,\r | |
36 | and use PciIo->Map to map the common buffer for Bus Master Read/Write.\r | |
37 | \r | |
38 | Arguments:\r | |
39 | \r | |
40 | HcDev - USB2_HC_DEV\r | |
41 | MemoryHeader - MEMORY_MANAGE_HEADER to output\r | |
42 | MemoryBlockSizeInPages - MemoryBlockSizeInPages\r | |
43 | \r | |
44 | Returns:\r | |
45 | \r | |
46 | EFI_SUCCESS Success\r | |
47 | EFI_OUT_OF_RESOURCES Fail for no resources\r | |
48 | EFI_UNSUPPORTED Unsupported currently\r | |
49 | \r | |
50 | --*/\r | |
51 | {\r | |
52 | EFI_STATUS Status;\r | |
53 | VOID *CommonBuffer;\r | |
54 | EFI_PHYSICAL_ADDRESS MappedAddress;\r | |
55 | UINTN MemoryBlockSizeInBytes;\r | |
56 | VOID *Mapping;\r | |
57 | \r | |
58 | //\r | |
59 | // Allocate memory for MemoryHeader\r | |
60 | //\r | |
61 | *MemoryHeader = AllocateZeroPool (sizeof (MEMORY_MANAGE_HEADER));\r | |
62 | if (*MemoryHeader == NULL) {\r | |
63 | return EFI_OUT_OF_RESOURCES;\r | |
64 | }\r | |
65 | \r | |
66 | (*MemoryHeader)->Next = NULL;\r | |
67 | \r | |
68 | //\r | |
69 | // set Memory block size\r | |
70 | //\r | |
71 | (*MemoryHeader)->MemoryBlockSizeInBytes = EFI_PAGES_TO_SIZE (MemoryBlockSizeInPages);\r | |
72 | \r | |
73 | //\r | |
74 | // each bit in Bit Array will manage 32 bytes memory in memory block\r | |
75 | //\r | |
76 | (*MemoryHeader)->BitArraySizeInBytes = ((*MemoryHeader)->MemoryBlockSizeInBytes / 32) / 8;\r | |
77 | \r | |
78 | //\r | |
79 | // Allocate memory for BitArray\r | |
80 | //\r | |
81 | (*MemoryHeader)->BitArrayPtr = AllocateZeroPool ((*MemoryHeader)->BitArraySizeInBytes);\r | |
82 | if ((*MemoryHeader)->BitArrayPtr == NULL) {\r | |
83 | gBS->FreePool (*MemoryHeader);\r | |
84 | return EFI_OUT_OF_RESOURCES;\r | |
85 | }\r | |
86 | \r | |
87 | //\r | |
88 | // Memory Block uses MemoryBlockSizeInPages pages,\r | |
89 | // and it is allocated as common buffer use.\r | |
90 | //\r | |
91 | Status = HcDev->PciIo->AllocateBuffer (\r | |
92 | HcDev->PciIo,\r | |
93 | AllocateAnyPages,\r | |
94 | EfiBootServicesData,\r | |
95 | MemoryBlockSizeInPages,\r | |
96 | &CommonBuffer,\r | |
97 | 0\r | |
98 | );\r | |
99 | if (EFI_ERROR (Status)) {\r | |
100 | gBS->FreePool ((*MemoryHeader)->BitArrayPtr);\r | |
101 | gBS->FreePool (*MemoryHeader);\r | |
102 | return EFI_OUT_OF_RESOURCES;\r | |
103 | }\r | |
104 | \r | |
105 | MemoryBlockSizeInBytes = EFI_PAGES_TO_SIZE (MemoryBlockSizeInPages);\r | |
106 | Status = HcDev->PciIo->Map (\r | |
107 | HcDev->PciIo,\r | |
108 | EfiPciIoOperationBusMasterCommonBuffer,\r | |
109 | CommonBuffer,\r | |
110 | &MemoryBlockSizeInBytes,\r | |
111 | &MappedAddress,\r | |
112 | &Mapping\r | |
113 | );\r | |
114 | //\r | |
115 | // If returned Mapped size is less than the size \r | |
116 | // we request,do not support.\r | |
117 | //\r | |
118 | if (EFI_ERROR (Status) || (MemoryBlockSizeInBytes != EFI_PAGES_TO_SIZE (MemoryBlockSizeInPages))) {\r | |
119 | HcDev->PciIo->FreeBuffer (HcDev->PciIo, MemoryBlockSizeInPages, CommonBuffer);\r | |
120 | gBS->FreePool ((*MemoryHeader)->BitArrayPtr);\r | |
121 | gBS->FreePool (*MemoryHeader);\r | |
122 | return EFI_UNSUPPORTED;\r | |
123 | }\r | |
124 | \r | |
125 | //\r | |
126 | // Data structure involved by host controller \r | |
127 | // should be restricted into the same 4G\r | |
128 | //\r | |
129 | if (HcDev->Is64BitCapable != 0) {\r | |
130 | if (HcDev->High32BitAddr != GET_32B_TO_63B (MappedAddress)) {\r | |
131 | HcDev->PciIo->Unmap (HcDev->PciIo, Mapping);\r | |
132 | HcDev->PciIo->FreeBuffer (HcDev->PciIo, MemoryBlockSizeInPages, CommonBuffer);\r | |
133 | gBS->FreePool ((*MemoryHeader)->BitArrayPtr);\r | |
134 | gBS->FreePool (*MemoryHeader);\r | |
135 | return EFI_UNSUPPORTED;\r | |
136 | }\r | |
137 | }\r | |
138 | \r | |
139 | //\r | |
140 | // Set Memory block initial address\r | |
141 | //\r | |
142 | (*MemoryHeader)->MemoryBlockPtr = (UINT8 *) ((UINTN) MappedAddress);\r | |
143 | (*MemoryHeader)->Mapping = Mapping;\r | |
144 | \r | |
145 | ZeroMem (\r | |
146 | (*MemoryHeader)->MemoryBlockPtr,\r | |
147 | EFI_PAGES_TO_SIZE (MemoryBlockSizeInPages)\r | |
148 | );\r | |
149 | \r | |
150 | return EFI_SUCCESS;\r | |
151 | }\r | |
152 | \r | |
153 | EFI_STATUS\r | |
154 | FreeMemoryHeader (\r | |
155 | IN USB2_HC_DEV *HcDev,\r | |
156 | IN MEMORY_MANAGE_HEADER *MemoryHeader\r | |
157 | )\r | |
158 | /*++\r | |
159 | \r | |
160 | Routine Description:\r | |
161 | \r | |
162 | Free Memory Header\r | |
163 | \r | |
164 | Arguments:\r | |
165 | \r | |
166 | HcDev - USB2_HC_DEV\r | |
167 | MemoryHeader - MemoryHeader to be freed\r | |
168 | \r | |
169 | Returns:\r | |
170 | \r | |
171 | EFI_SUCCESS Success\r | |
172 | EFI_INVALID_PARAMETER Parameter is error\r | |
173 | \r | |
174 | --*/\r | |
175 | {\r | |
176 | if ((MemoryHeader == NULL) || (HcDev == NULL)) {\r | |
177 | return EFI_INVALID_PARAMETER;\r | |
178 | }\r | |
179 | //\r | |
180 | // unmap the common buffer used by the memory block\r | |
181 | //\r | |
182 | HcDev->PciIo->Unmap (HcDev->PciIo, MemoryHeader->Mapping);\r | |
183 | \r | |
184 | //\r | |
185 | // free common buffer\r | |
186 | //\r | |
187 | HcDev->PciIo->FreeBuffer (\r | |
188 | HcDev->PciIo,\r | |
189 | EFI_SIZE_TO_PAGES (MemoryHeader->MemoryBlockSizeInBytes),\r | |
190 | MemoryHeader->MemoryBlockPtr\r | |
191 | );\r | |
192 | //\r | |
193 | // free bit array\r | |
194 | //\r | |
195 | gBS->FreePool (MemoryHeader->BitArrayPtr);\r | |
196 | //\r | |
197 | // free memory header\r | |
198 | //\r | |
199 | gBS->FreePool (MemoryHeader);\r | |
200 | \r | |
201 | return EFI_SUCCESS;\r | |
202 | }\r | |
203 | \r | |
204 | EFI_STATUS\r | |
205 | EhciAllocatePool (\r | |
206 | IN USB2_HC_DEV *HcDev,\r | |
207 | OUT UINT8 **Pool,\r | |
208 | IN UINTN AllocSize\r | |
209 | )\r | |
210 | /*++\r | |
211 | \r | |
212 | Routine Description:\r | |
213 | \r | |
214 | Ehci Allocate Pool\r | |
215 | \r | |
216 | Arguments:\r | |
217 | \r | |
218 | HcDev - USB2_HC_DEV\r | |
219 | Pool - Place to store pointer to the memory buffer\r | |
220 | AllocSize - Alloc Size\r | |
221 | \r | |
222 | Returns:\r | |
223 | \r | |
224 | EFI_SUCCESS Success\r | |
225 | EFI_DEVICE_ERROR Fail\r | |
226 | \r | |
227 | --*/\r | |
228 | {\r | |
229 | MEMORY_MANAGE_HEADER *MemoryHeader;\r | |
230 | MEMORY_MANAGE_HEADER *TempHeaderPtr;\r | |
231 | MEMORY_MANAGE_HEADER *NewMemoryHeader;\r | |
232 | UINTN RealAllocSize;\r | |
233 | UINTN MemoryBlockSizeInPages;\r | |
234 | EFI_STATUS Status;\r | |
235 | EFI_TPL OldTpl;\r | |
236 | \r | |
237 | *Pool = NULL;\r | |
238 | \r | |
239 | MemoryHeader = HcDev->MemoryHeader;\r | |
240 | ASSERT (MemoryHeader != NULL);\r | |
241 | \r | |
242 | OldTpl = gBS->RaiseTPL (EFI_TPL_NOTIFY + 1);\r | |
243 | \r | |
244 | //\r | |
245 | // allocate unit is 32 bytes (align on 32 byte)\r | |
246 | //\r | |
247 | if (AllocSize & 0x1F) {\r | |
248 | RealAllocSize = (AllocSize / 32 + 1) * 32;\r | |
249 | } else {\r | |
250 | RealAllocSize = AllocSize;\r | |
251 | }\r | |
252 | \r | |
253 | //\r | |
254 | // There may be linked MemoryHeaders.\r | |
255 | // To allocate a free pool in Memory blocks,\r | |
256 | // must search in the MemoryHeader link list\r | |
257 | // until enough free pool is found.\r | |
258 | //\r | |
259 | Status = EFI_NOT_FOUND;\r | |
260 | for (TempHeaderPtr = MemoryHeader; TempHeaderPtr != NULL; TempHeaderPtr = TempHeaderPtr->Next) {\r | |
261 | \r | |
262 | Status = AllocMemInMemoryBlock (\r | |
263 | TempHeaderPtr,\r | |
264 | (VOID **) Pool,\r | |
265 | RealAllocSize / 32\r | |
266 | );\r | |
267 | if (!EFI_ERROR (Status)) {\r | |
268 | ZeroMem (*Pool, AllocSize);\r | |
269 | gBS->RestoreTPL (OldTpl);\r | |
270 | return EFI_SUCCESS;\r | |
271 | }\r | |
272 | }\r | |
273 | \r | |
274 | gBS->RestoreTPL (OldTpl);\r | |
275 | \r | |
276 | //\r | |
277 | // There is no enough memory,\r | |
278 | // Create a new Memory Block\r | |
279 | //\r | |
280 | \r | |
281 | //\r | |
282 | // if pool size is larger than NORMAL_MEMORY_BLOCK_UNIT_IN_PAGES,\r | |
283 | // just allocate a large enough memory block.\r | |
284 | //\r | |
285 | if (RealAllocSize > EFI_PAGES_TO_SIZE (NORMAL_MEMORY_BLOCK_UNIT_IN_PAGES)) {\r | |
286 | MemoryBlockSizeInPages = EFI_SIZE_TO_PAGES (RealAllocSize) + 1;\r | |
287 | } else {\r | |
288 | MemoryBlockSizeInPages = NORMAL_MEMORY_BLOCK_UNIT_IN_PAGES;\r | |
289 | }\r | |
290 | \r | |
291 | Status = CreateMemoryBlock (HcDev, &NewMemoryHeader, MemoryBlockSizeInPages);\r | |
292 | if (EFI_ERROR (Status)) {\r | |
293 | return Status;\r | |
294 | }\r | |
295 | \r | |
296 | OldTpl = gBS->RaiseTPL (EFI_TPL_NOTIFY + 1);\r\r | |
297 | \r | |
298 | //\r | |
299 | // Link the new Memory Block to the Memory Header list\r | |
300 | //\r | |
301 | InsertMemoryHeaderToList (MemoryHeader, NewMemoryHeader);\r | |
302 | \r | |
303 | Status = AllocMemInMemoryBlock (\r | |
304 | NewMemoryHeader,\r | |
305 | (VOID **) Pool,\r | |
306 | RealAllocSize / 32\r | |
307 | );\r | |
308 | if (!EFI_ERROR (Status)) {\r | |
309 | ZeroMem (*Pool, AllocSize);\r | |
310 | }\r | |
311 | \r | |
312 | gBS->RestoreTPL (OldTpl);\r | |
313 | return Status;\r | |
314 | }\r | |
315 | \r | |
316 | VOID\r | |
317 | EhciFreePool (\r | |
318 | IN USB2_HC_DEV *HcDev,\r | |
319 | IN UINT8 *Pool,\r | |
320 | IN UINTN AllocSize\r | |
321 | )\r | |
322 | /*++\r | |
323 | \r | |
324 | Routine Description:\r | |
325 | \r | |
326 | Uhci Free Pool\r | |
327 | \r | |
328 | Arguments:\r | |
329 | \r | |
330 | HcDev - USB_HC_DEV\r | |
331 | Pool - Pool to free\r | |
332 | AllocSize - Pool size\r | |
333 | \r | |
334 | Returns:\r | |
335 | \r | |
336 | VOID\r | |
337 | \r | |
338 | --*/\r | |
339 | {\r | |
340 | MEMORY_MANAGE_HEADER *MemoryHeader;\r | |
341 | MEMORY_MANAGE_HEADER *TempHeaderPtr;\r | |
342 | UINTN StartBytePos;\r | |
343 | UINTN Index;\r | |
344 | UINT8 StartBitPos;\r | |
345 | UINT8 Index2;\r | |
346 | UINTN Count;\r | |
347 | UINTN RealAllocSize;\r | |
348 | EFI_TPL OldTpl;\r | |
349 | \r | |
350 | OldTpl = gBS->RaiseTPL (EFI_TPL_NOTIFY + 1);\r | |
351 | \r | |
352 | MemoryHeader = HcDev->MemoryHeader;\r | |
353 | \r | |
354 | //\r | |
355 | // allocate unit is 32 byte (align on 32 byte)\r | |
356 | //\r | |
357 | if (AllocSize & 0x1F) {\r | |
358 | RealAllocSize = (AllocSize / 32 + 1) * 32;\r | |
359 | } else {\r | |
360 | RealAllocSize = AllocSize;\r | |
361 | }\r | |
362 | \r | |
363 | //\r | |
364 | // scan the memory header linked list for\r | |
365 | // the asigned memory to free.\r | |
366 | //\r | |
367 | for (TempHeaderPtr = MemoryHeader; TempHeaderPtr != NULL; TempHeaderPtr = TempHeaderPtr->Next) {\r | |
368 | \r | |
369 | if ((Pool >= TempHeaderPtr->MemoryBlockPtr) &&\r | |
370 | ((Pool + RealAllocSize) <= (TempHeaderPtr->MemoryBlockPtr + TempHeaderPtr->MemoryBlockSizeInBytes))\r | |
371 | ) {\r | |
372 | //\r | |
373 | // Pool is in the Memory Block area,\r | |
374 | // find the start byte and bit in the bit array\r | |
375 | //\r | |
376 | StartBytePos = ((Pool - TempHeaderPtr->MemoryBlockPtr) / 32) / 8;\r | |
377 | StartBitPos = (UINT8) (((Pool - TempHeaderPtr->MemoryBlockPtr) / 32) & 0x7);\r | |
378 | \r | |
379 | //\r | |
380 | // reset associated bits in bit arry\r | |
381 | //\r | |
382 | for (Index = StartBytePos, Index2 = StartBitPos, Count = 0; Count < (RealAllocSize / 32); Count++) {\r | |
383 | TempHeaderPtr->BitArrayPtr[Index] ^= (UINT8) (bit (Index2));\r | |
384 | Index2++;\r | |
385 | if (Index2 == 8) {\r | |
386 | Index += 1;\r | |
387 | Index2 = 0;\r | |
388 | }\r | |
389 | }\r | |
390 | //\r | |
391 | // break the loop\r | |
392 | //\r | |
393 | break;\r | |
394 | }\r | |
395 | }\r | |
396 | \r | |
397 | //\r | |
398 | // Release emptied memory blocks (only if the memory block is not\r | |
399 | // the first one in the memory header list\r | |
400 | //\r | |
401 | for (TempHeaderPtr = MemoryHeader->Next; TempHeaderPtr != NULL;) {\r | |
402 | \r | |
403 | ASSERT (MemoryHeader->Next != NULL);\r | |
404 | \r | |
405 | if (IsMemoryBlockEmptied (TempHeaderPtr)) {\r | |
406 | \r | |
407 | DelinkMemoryBlock (MemoryHeader, TempHeaderPtr);\r | |
408 | //\r | |
409 | // when the TempHeaderPtr is freed in FreeMemoryHeader(),\r | |
410 | // the TempHeaderPtr is pointing to nonsense content.\r | |
411 | //\r | |
412 | gBS->RestoreTPL (OldTpl);\r | |
413 | FreeMemoryHeader (HcDev, TempHeaderPtr);\r | |
414 | OldTpl = gBS->RaiseTPL (EFI_TPL_NOTIFY + 1);\r | |
415 | //\r | |
416 | // reset the TempHeaderPtr, continue search for\r | |
417 | // another empty memory block.\r | |
418 | //\r | |
419 | TempHeaderPtr = MemoryHeader->Next;\r | |
420 | continue;\r | |
421 | }\r | |
422 | \r | |
423 | TempHeaderPtr = TempHeaderPtr->Next;\r | |
424 | }\r | |
425 | \r | |
426 | gBS->RestoreTPL (OldTpl);\r | |
427 | }\r | |
428 | \r | |
429 | VOID\r | |
430 | InsertMemoryHeaderToList (\r | |
431 | IN MEMORY_MANAGE_HEADER *MemoryHeader,\r | |
432 | IN MEMORY_MANAGE_HEADER *NewMemoryHeader\r | |
433 | )\r | |
434 | /*++\r | |
435 | \r | |
436 | Routine Description:\r | |
437 | \r | |
438 | Insert Memory Header To List\r | |
439 | \r | |
440 | Arguments:\r | |
441 | \r | |
442 | MemoryHeader - MEMORY_MANAGE_HEADER\r | |
443 | NewMemoryHeader - MEMORY_MANAGE_HEADER\r | |
444 | \r | |
445 | Returns:\r | |
446 | \r | |
447 | VOID\r | |
448 | \r | |
449 | --*/\r | |
450 | {\r | |
451 | MEMORY_MANAGE_HEADER *TempHeaderPtr;\r | |
452 | \r | |
453 | for (TempHeaderPtr = MemoryHeader; TempHeaderPtr != NULL; TempHeaderPtr = TempHeaderPtr->Next) {\r | |
454 | if (TempHeaderPtr->Next == NULL) {\r | |
455 | TempHeaderPtr->Next = NewMemoryHeader;\r | |
456 | break;\r | |
457 | }\r | |
458 | }\r | |
459 | }\r | |
460 | \r | |
461 | EFI_STATUS\r | |
462 | AllocMemInMemoryBlock (\r | |
463 | IN MEMORY_MANAGE_HEADER *MemoryHeader,\r | |
464 | OUT VOID **Pool,\r | |
465 | IN UINTN NumberOfMemoryUnit\r | |
466 | )\r | |
467 | /*++\r | |
468 | \r | |
469 | Routine Description:\r | |
470 | \r | |
471 | Alloc Memory In MemoryBlock\r | |
472 | \r | |
473 | Arguments:\r | |
474 | \r | |
475 | MemoryHeader - MEMORY_MANAGE_HEADER\r | |
476 | Pool - Place to store pointer to memory\r | |
477 | NumberOfMemoryUnit - Number Of Memory Unit\r | |
478 | \r | |
479 | Returns:\r | |
480 | \r | |
481 | EFI_SUCCESS Success\r | |
482 | EFI_NOT_FOUND Can't find the free memory \r | |
483 | \r | |
484 | --*/\r | |
485 | {\r | |
486 | UINTN TempBytePos;\r | |
487 | UINTN FoundBytePos;\r | |
488 | UINT8 Index;\r | |
489 | UINT8 FoundBitPos;\r | |
490 | UINT8 ByteValue;\r | |
491 | UINT8 BitValue;\r | |
492 | UINTN NumberOfZeros;\r | |
493 | UINTN Count;\r | |
494 | \r | |
495 | FoundBytePos = 0;\r | |
496 | FoundBitPos = 0;\r | |
497 | ByteValue = MemoryHeader->BitArrayPtr[0];\r | |
498 | NumberOfZeros = 0;\r | |
499 | Index = 0;\r | |
500 | \r | |
501 | for (TempBytePos = 0; TempBytePos < MemoryHeader->BitArraySizeInBytes;) {\r | |
502 | \r | |
503 | //\r | |
504 | // Pop out BitValue from a byte in TempBytePos.\r | |
505 | //\r | |
506 | BitValue = (UINT8) (ByteValue & 0x1);\r | |
507 | \r | |
508 | //\r | |
509 | // right shift the byte\r | |
510 | //\r | |
511 | ByteValue /= 2;\r | |
512 | \r | |
513 | if (BitValue == 0) {\r | |
514 | //\r | |
515 | // Found a free bit, the NumberOfZeros only record the number\r | |
516 | // of those consecutive zeros\r | |
517 | //\r | |
518 | NumberOfZeros++;\r | |
519 | //\r | |
520 | // Found enough consecutive free space, break the loop\r | |
521 | //\r | |
522 | if (NumberOfZeros >= NumberOfMemoryUnit) {\r | |
523 | break;\r | |
524 | }\r | |
525 | } else {\r | |
526 | //\r | |
527 | // Encountering a '1', meant the bit is ocupied.\r | |
528 | //\r | |
529 | if (NumberOfZeros >= NumberOfMemoryUnit) {\r | |
530 | //\r | |
531 | // Found enough consecutive free space,break the loop\r | |
532 | //\r | |
533 | break;\r | |
534 | } else {\r | |
535 | //\r | |
536 | // the NumberOfZeros only record the number of those consecutive zeros,\r | |
537 | // so reset the NumberOfZeros to 0 when encountering '1' before finding\r | |
538 | // enough consecutive '0's\r | |
539 | //\r | |
540 | NumberOfZeros = 0;\r | |
541 | //\r | |
542 | // reset the (FoundBytePos,FoundBitPos) to the position of '1'\r | |
543 | //\r | |
544 | FoundBytePos = TempBytePos;\r | |
545 | FoundBitPos = Index;\r | |
546 | }\r | |
547 | }\r | |
548 | \r | |
549 | //\r | |
550 | // step forward a bit\r | |
551 | //\r | |
552 | Index++;\r | |
553 | if (Index == 8) {\r | |
554 | //\r | |
555 | // step forward a byte, getting the byte value,\r | |
556 | // and reset the bit pos.\r | |
557 | //\r | |
558 | TempBytePos += 1;\r | |
559 | ByteValue = MemoryHeader->BitArrayPtr[TempBytePos];\r | |
560 | Index = 0;\r | |
561 | }\r | |
562 | }\r | |
563 | \r | |
564 | if (NumberOfZeros < NumberOfMemoryUnit) {\r | |
565 | return EFI_NOT_FOUND;\r | |
566 | }\r | |
567 | \r | |
568 | //\r | |
569 | // Found enough free space.\r | |
570 | //\r | |
571 | \r | |
572 | //\r | |
573 | // The values recorded in (FoundBytePos,FoundBitPos) have two conditions:\r | |
574 | // 1)(FoundBytePos,FoundBitPos) record the position\r | |
575 | // of the last '1' before the consecutive '0's, it must\r | |
576 | // be adjusted to the start position of the consecutive '0's.\r | |
577 | // 2)the start address of the consecutive '0's is just the start of\r | |
578 | // the bitarray. so no need to adjust the values of\r | |
579 | // (FoundBytePos,FoundBitPos).\r | |
580 | //\r | |
581 | if ((MemoryHeader->BitArrayPtr[FoundBytePos] & bit (FoundBitPos)) != 0) {\r | |
582 | FoundBitPos += 1;\r | |
583 | }\r | |
584 | \r | |
585 | //\r | |
586 | // Have the (FoundBytePos,FoundBitPos) make sense.\r | |
587 | //\r | |
588 | if (FoundBitPos > 7) {\r | |
589 | FoundBytePos += 1;\r | |
590 | FoundBitPos -= 8;\r | |
591 | }\r | |
592 | \r | |
593 | //\r | |
594 | // Set the memory as allocated\r | |
595 | //\r | |
596 | for (TempBytePos = FoundBytePos, Index = FoundBitPos, Count = 0; Count < NumberOfMemoryUnit; Count++) {\r | |
597 | \r | |
598 | MemoryHeader->BitArrayPtr[TempBytePos] |= bit (Index);\r | |
599 | Index++;\r | |
600 | if (Index == 8) {\r | |
601 | TempBytePos += 1;\r | |
602 | Index = 0;\r | |
603 | }\r | |
604 | }\r | |
605 | \r | |
606 | *Pool = MemoryHeader->MemoryBlockPtr + (FoundBytePos * 8 + FoundBitPos) * 32;\r | |
607 | \r | |
608 | return EFI_SUCCESS;\r | |
609 | }\r | |
610 | \r | |
611 | BOOLEAN\r | |
612 | IsMemoryBlockEmptied (\r | |
613 | IN MEMORY_MANAGE_HEADER *MemoryHeaderPtr\r | |
614 | )\r | |
615 | /*++\r | |
616 | \r | |
617 | Routine Description:\r | |
618 | \r | |
619 | Is Memory Block Emptied\r | |
620 | \r | |
621 | Arguments:\r | |
622 | \r | |
623 | MemoryHeaderPtr - MEMORY_MANAGE_HEADER\r | |
624 | \r | |
625 | Returns:\r | |
626 | \r | |
627 | TRUE Empty\r | |
628 | FALSE Not Empty \r | |
629 | \r | |
630 | --*/\r | |
631 | {\r | |
632 | UINTN Index;\r | |
633 | \r | |
634 | for (Index = 0; Index < MemoryHeaderPtr->BitArraySizeInBytes; Index++) {\r | |
635 | if (MemoryHeaderPtr->BitArrayPtr[Index] != 0) {\r | |
636 | return FALSE;\r | |
637 | }\r | |
638 | }\r | |
639 | \r | |
640 | return TRUE;\r | |
641 | }\r | |
642 | \r | |
643 | VOID\r | |
644 | DelinkMemoryBlock (\r | |
645 | IN MEMORY_MANAGE_HEADER *FirstMemoryHeader,\r | |
646 | IN MEMORY_MANAGE_HEADER *NeedFreeMemoryHeader\r | |
647 | )\r | |
648 | /*++\r | |
649 | \r | |
650 | Routine Description:\r | |
651 | \r | |
652 | Delink Memory Block\r | |
653 | \r | |
654 | Arguments:\r | |
655 | \r | |
656 | FirstMemoryHeader - MEMORY_MANAGE_HEADER\r | |
657 | NeedFreeMemoryHeader - MEMORY_MANAGE_HEADER\r | |
658 | \r | |
659 | Returns:\r | |
660 | \r | |
661 | VOID\r | |
662 | \r | |
663 | --*/\r | |
664 | {\r | |
665 | MEMORY_MANAGE_HEADER *TempHeaderPtr;\r | |
666 | \r | |
667 | if ((FirstMemoryHeader == NULL) || (NeedFreeMemoryHeader == NULL)) {\r | |
668 | return ;\r | |
669 | }\r | |
670 | \r | |
671 | for (TempHeaderPtr = FirstMemoryHeader; TempHeaderPtr != NULL; TempHeaderPtr = TempHeaderPtr->Next) {\r | |
672 | \r | |
673 | if (TempHeaderPtr->Next == NeedFreeMemoryHeader) {\r | |
674 | //\r | |
675 | // Link the before and after\r | |
676 | //\r | |
677 | TempHeaderPtr->Next = NeedFreeMemoryHeader->Next;\r | |
678 | break;\r | |
679 | }\r | |
680 | }\r | |
681 | }\r | |
682 | \r | |
683 | EFI_STATUS\r | |
684 | InitialMemoryManagement (\r | |
685 | IN USB2_HC_DEV *HcDev\r | |
686 | )\r | |
687 | /*++\r | |
688 | \r | |
689 | Routine Description:\r | |
690 | \r | |
691 | Initialize Memory Management\r | |
692 | \r | |
693 | Arguments:\r | |
694 | \r | |
695 | HcDev - USB2_HC_DEV\r | |
696 | \r | |
697 | Returns:\r | |
698 | \r | |
699 | EFI_SUCCESS Success\r | |
700 | EFI_DEVICE_ERROR Fail\r | |
701 | \r | |
702 | --*/\r | |
703 | {\r | |
704 | EFI_STATUS Status;\r | |
705 | MEMORY_MANAGE_HEADER *MemoryHeader;\r | |
706 | UINTN MemPages;\r | |
707 | \r | |
708 | MemPages = NORMAL_MEMORY_BLOCK_UNIT_IN_PAGES;\r | |
709 | Status = CreateMemoryBlock (HcDev, &MemoryHeader, MemPages);\r | |
710 | if (EFI_ERROR (Status)) {\r | |
711 | Status = EFI_OUT_OF_RESOURCES;\r | |
712 | goto exit;\r | |
713 | }\r | |
714 | \r | |
715 | HcDev->MemoryHeader = MemoryHeader;\r | |
716 | \r | |
717 | exit:\r | |
718 | return Status;\r | |
719 | }\r | |
720 | \r | |
721 | EFI_STATUS\r | |
722 | DeinitialMemoryManagement (\r | |
723 | IN USB2_HC_DEV *HcDev\r | |
724 | )\r | |
725 | /*++\r | |
726 | \r | |
727 | Routine Description:\r | |
728 | \r | |
729 | Deinitialize Memory Management\r | |
730 | \r | |
731 | Arguments:\r | |
732 | \r | |
733 | HcDev - USB2_HC_DEV\r | |
734 | \r | |
735 | Returns:\r | |
736 | \r | |
737 | EFI_SUCCESS Success\r | |
738 | EFI_DEVICE_ERROR Fail\r | |
739 | \r | |
740 | --*/\r | |
741 | {\r | |
742 | MEMORY_MANAGE_HEADER *TempHeaderPtr;\r | |
743 | \r | |
744 | for (TempHeaderPtr = HcDev->MemoryHeader->Next; TempHeaderPtr != NULL;) {\r | |
745 | \r | |
746 | DelinkMemoryBlock (HcDev->MemoryHeader, TempHeaderPtr);\r | |
747 | //\r | |
748 | // when the TempHeaderPtr is freed in FreeMemoryHeader(),\r | |
749 | // the TempHeaderPtr is pointing to nonsense content.\r | |
750 | //\r | |
751 | FreeMemoryHeader (HcDev, TempHeaderPtr);\r | |
752 | //\r | |
753 | // reset the TempHeaderPtr,continue free another memory block.\r | |
754 | //\r | |
755 | TempHeaderPtr = HcDev->MemoryHeader->Next;\r | |
756 | }\r | |
757 | \r | |
758 | FreeMemoryHeader (HcDev, HcDev->MemoryHeader);\r | |
759 | \r | |
760 | return EFI_SUCCESS;\r | |
761 | }\r |