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e42e9404 | 1 | /** @file\r |
2 | SMM Memory pool management functions.\r | |
3 | \r | |
cd5ebaa0 | 4 | Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r |
e42e9404 | 5 | This program and the accompanying materials are licensed and made available \r |
6 | under the terms and conditions of the BSD License which accompanies this \r | |
7 | distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "PiSmmCore.h"\r | |
16 | \r | |
17 | //\r | |
18 | // MIN_POOL_SHIFT must not be less than 5\r | |
19 | //\r | |
20 | #define MIN_POOL_SHIFT 6\r | |
21 | #define MIN_POOL_SIZE (1 << MIN_POOL_SHIFT)\r | |
22 | \r | |
23 | //\r | |
24 | // MAX_POOL_SHIFT must not be less than EFI_PAGE_SHIFT - 1\r | |
25 | //\r | |
26 | #define MAX_POOL_SHIFT (EFI_PAGE_SHIFT - 1)\r | |
27 | #define MAX_POOL_SIZE (1 << MAX_POOL_SHIFT)\r | |
28 | \r | |
29 | //\r | |
30 | // MAX_POOL_INDEX are calculated by maximum and minimum pool sizes\r | |
31 | //\r | |
32 | #define MAX_POOL_INDEX (MAX_POOL_SHIFT - MIN_POOL_SHIFT + 1)\r | |
33 | \r | |
34 | typedef struct {\r | |
35 | UINTN Size;\r | |
36 | BOOLEAN Available;\r | |
37 | } POOL_HEADER;\r | |
38 | \r | |
39 | typedef struct {\r | |
40 | POOL_HEADER Header;\r | |
41 | LIST_ENTRY Link;\r | |
42 | } FREE_POOL_HEADER;\r | |
43 | \r | |
44 | LIST_ENTRY mSmmPoolLists[MAX_POOL_INDEX];\r | |
3c447c27 | 45 | //\r |
46 | // To cache the SMRAM base since when Loading modules At fixed address feature is enabled, \r | |
47 | // all module is assigned an offset relative the SMRAM base in build time.\r | |
48 | //\r | |
49 | GLOBAL_REMOVE_IF_UNREFERENCED EFI_PHYSICAL_ADDRESS gLoadModuleAtFixAddressSmramBase = 0;\r | |
e42e9404 | 50 | \r |
51 | /**\r | |
52 | Called to initialize the memory service.\r | |
53 | \r | |
54 | @param SmramRangeCount Number of SMRAM Regions\r | |
55 | @param SmramRanges Pointer to SMRAM Descriptors\r | |
56 | \r | |
57 | **/\r | |
58 | VOID\r | |
59 | SmmInitializeMemoryServices (\r | |
60 | IN UINTN SmramRangeCount,\r | |
61 | IN EFI_SMRAM_DESCRIPTOR *SmramRanges\r | |
62 | )\r | |
63 | {\r | |
3c447c27 | 64 | UINTN Index;\r |
65 | UINT64 SmmCodeSize;\r | |
66 | UINTN CurrentSmramRangesIndex;\r | |
67 | UINT64 MaxSize;\r | |
e42e9404 | 68 | \r |
69 | //\r | |
70 | // Initialize Pool list\r | |
71 | //\r | |
72 | for (Index = sizeof (mSmmPoolLists) / sizeof (*mSmmPoolLists); Index > 0;) {\r | |
73 | InitializeListHead (&mSmmPoolLists[--Index]);\r | |
74 | }\r | |
3c447c27 | 75 | CurrentSmramRangesIndex = 0;\r |
76 | //\r | |
77 | // If Loadding Module At fixed Address feature is enabled, cache the SMRAM base here\r | |
78 | //\r | |
79 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r | |
80 | //\r | |
81 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber\r | |
82 | //\r | |
83 | SmmCodeSize = LShiftU64 (PcdGet32(PcdLoadFixAddressSmmCodePageNumber), EFI_PAGE_SHIFT);\r | |
84 | \r | |
85 | //\r | |
86 | // Find the largest SMRAM range between 1MB and 4GB that is at least 256KB - 4K in size\r | |
87 | //\r | |
88 | for (Index = 0, MaxSize = SIZE_256KB - EFI_PAGE_SIZE; Index < SmramRangeCount; Index++) {\r | |
89 | if (SmramRanges[Index].CpuStart >= BASE_1MB) {\r | |
90 | if ((SmramRanges[Index].CpuStart + SmramRanges[Index].PhysicalSize) <= BASE_4GB) {\r | |
91 | if (SmramRanges[Index].PhysicalSize >= MaxSize) {\r | |
92 | MaxSize = SmramRanges[Index].PhysicalSize;\r | |
93 | CurrentSmramRangesIndex = Index;\r | |
94 | }\r | |
95 | }\r | |
96 | }\r | |
97 | }\r | |
98 | gLoadModuleAtFixAddressSmramBase = SmramRanges[CurrentSmramRangesIndex].CpuStart;\r | |
99 | \r | |
100 | //\r | |
101 | // cut out a memory range from this SMRAM range with the size SmmCodeSize to hold SMM driver code\r | |
102 | // A notable thing is that SMM core is already loaded into this range.\r | |
103 | //\r | |
104 | SmramRanges[CurrentSmramRangesIndex].CpuStart = SmramRanges[CurrentSmramRangesIndex].CpuStart + SmmCodeSize; \r | |
105 | SmramRanges[CurrentSmramRangesIndex].PhysicalSize = SmramRanges[CurrentSmramRangesIndex].PhysicalSize - SmmCodeSize;\r | |
106 | }\r | |
e42e9404 | 107 | //\r |
108 | // Initialize free SMRAM regions\r | |
109 | //\r | |
110 | for (Index = 0; Index < SmramRangeCount; Index++) {\r | |
111 | SmmAddMemoryRegion (\r | |
112 | SmramRanges[Index].CpuStart,\r | |
113 | SmramRanges[Index].PhysicalSize,\r | |
114 | EfiConventionalMemory,\r | |
115 | SmramRanges[Index].RegionState\r | |
116 | );\r | |
117 | }\r | |
3c447c27 | 118 | \r |
e42e9404 | 119 | }\r |
120 | \r | |
121 | /**\r | |
122 | Internal Function. Allocate a pool by specified PoolIndex.\r | |
123 | \r | |
124 | @param PoolIndex Index which indicate the Pool size.\r | |
125 | @param FreePoolHdr The returned Free pool.\r | |
126 | \r | |
127 | @retval EFI_OUT_OF_RESOURCES Allocation failed.\r | |
128 | @retval EFI_SUCCESS Pool successfully allocated.\r | |
129 | \r | |
130 | **/\r | |
131 | EFI_STATUS\r | |
132 | InternalAllocPoolByIndex (\r | |
133 | IN UINTN PoolIndex,\r | |
134 | OUT FREE_POOL_HEADER **FreePoolHdr\r | |
135 | )\r | |
136 | {\r | |
137 | EFI_STATUS Status;\r | |
138 | FREE_POOL_HEADER *Hdr;\r | |
139 | \r | |
52c0d06b | 140 | ASSERT (PoolIndex <= MAX_POOL_INDEX);\r |
e42e9404 | 141 | Status = EFI_SUCCESS;\r |
142 | if (PoolIndex == MAX_POOL_INDEX) {\r | |
143 | Hdr = (FREE_POOL_HEADER *)AllocatePages (EFI_SIZE_TO_PAGES (MAX_POOL_SIZE << 1));\r | |
144 | if (Hdr == NULL) {\r | |
5b422a7b | 145 | return EFI_OUT_OF_RESOURCES;\r |
e42e9404 | 146 | }\r |
147 | } else if (!IsListEmpty (&mSmmPoolLists[PoolIndex])) {\r | |
148 | Hdr = BASE_CR (GetFirstNode (&mSmmPoolLists[PoolIndex]), FREE_POOL_HEADER, Link);\r | |
149 | RemoveEntryList (&Hdr->Link);\r | |
150 | } else {\r | |
151 | Status = InternalAllocPoolByIndex (PoolIndex + 1, &Hdr);\r | |
152 | if (!EFI_ERROR (Status)) {\r | |
153 | Hdr->Header.Size >>= 1;\r | |
154 | Hdr->Header.Available = TRUE;\r | |
155 | InsertHeadList (&mSmmPoolLists[PoolIndex], &Hdr->Link);\r | |
156 | Hdr = (FREE_POOL_HEADER*)((UINT8*)Hdr + Hdr->Header.Size);\r | |
157 | }\r | |
158 | }\r | |
159 | \r | |
160 | if (!EFI_ERROR (Status)) {\r | |
161 | Hdr->Header.Size = MIN_POOL_SIZE << PoolIndex;\r | |
162 | Hdr->Header.Available = FALSE;\r | |
163 | }\r | |
164 | \r | |
165 | *FreePoolHdr = Hdr;\r | |
166 | return Status;\r | |
167 | }\r | |
168 | \r | |
169 | /**\r | |
170 | Internal Function. Free a pool by specified PoolIndex.\r | |
171 | \r | |
172 | @param FreePoolHdr The pool to free.\r | |
173 | \r | |
174 | @retval EFI_SUCCESS Pool successfully freed.\r | |
175 | \r | |
176 | **/\r | |
177 | EFI_STATUS\r | |
178 | InternalFreePoolByIndex (\r | |
179 | IN FREE_POOL_HEADER *FreePoolHdr\r | |
180 | )\r | |
181 | {\r | |
182 | UINTN PoolIndex;\r | |
183 | \r | |
184 | ASSERT ((FreePoolHdr->Header.Size & (FreePoolHdr->Header.Size - 1)) == 0);\r | |
185 | ASSERT (((UINTN)FreePoolHdr & (FreePoolHdr->Header.Size - 1)) == 0);\r | |
186 | ASSERT (FreePoolHdr->Header.Size >= MIN_POOL_SIZE);\r | |
187 | \r | |
188 | PoolIndex = HighBitSet32 ((UINT32)FreePoolHdr->Header.Size) - MIN_POOL_SHIFT;\r | |
189 | FreePoolHdr->Header.Available = TRUE;\r | |
5b422a7b | 190 | ASSERT (PoolIndex < MAX_POOL_INDEX);\r |
e42e9404 | 191 | InsertHeadList (&mSmmPoolLists[PoolIndex], &FreePoolHdr->Link);\r |
192 | return EFI_SUCCESS;\r | |
193 | }\r | |
194 | \r | |
195 | /**\r | |
196 | Allocate pool of a particular type.\r | |
197 | \r | |
198 | @param PoolType Type of pool to allocate.\r | |
199 | @param Size The amount of pool to allocate.\r | |
200 | @param Buffer The address to return a pointer to the allocated\r | |
201 | pool.\r | |
202 | \r | |
203 | @retval EFI_INVALID_PARAMETER PoolType not valid.\r | |
204 | @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.\r | |
205 | @retval EFI_SUCCESS Pool successfully allocated.\r | |
206 | \r | |
207 | **/\r | |
208 | EFI_STATUS\r | |
209 | EFIAPI\r | |
210 | SmmAllocatePool (\r | |
211 | IN EFI_MEMORY_TYPE PoolType,\r | |
212 | IN UINTN Size,\r | |
213 | OUT VOID **Buffer\r | |
214 | )\r | |
215 | {\r | |
216 | POOL_HEADER *PoolHdr;\r | |
217 | FREE_POOL_HEADER *FreePoolHdr;\r | |
218 | EFI_STATUS Status;\r | |
219 | EFI_PHYSICAL_ADDRESS Address;\r | |
220 | UINTN PoolIndex;\r | |
221 | \r | |
222 | if (PoolType != EfiRuntimeServicesCode &&\r | |
223 | PoolType != EfiRuntimeServicesData) {\r | |
224 | return EFI_INVALID_PARAMETER;\r | |
225 | }\r | |
226 | \r | |
e42e9404 | 227 | Size += sizeof (*PoolHdr);\r |
228 | if (Size > MAX_POOL_SIZE) {\r | |
229 | Size = EFI_SIZE_TO_PAGES (Size);\r | |
230 | Status = SmmAllocatePages (AllocateAnyPages, PoolType, Size, &Address);\r | |
231 | if (EFI_ERROR (Status)) {\r | |
232 | return Status;\r | |
233 | }\r | |
234 | \r | |
235 | PoolHdr = (POOL_HEADER*)(UINTN)Address;\r | |
236 | PoolHdr->Size = EFI_PAGES_TO_SIZE (Size);\r | |
237 | PoolHdr->Available = FALSE;\r | |
238 | *Buffer = PoolHdr + 1;\r | |
239 | return Status;\r | |
240 | }\r | |
241 | \r | |
242 | Size = (Size + MIN_POOL_SIZE - 1) >> MIN_POOL_SHIFT;\r | |
243 | PoolIndex = HighBitSet32 ((UINT32)Size);\r | |
244 | if ((Size & (Size - 1)) != 0) {\r | |
245 | PoolIndex++;\r | |
246 | }\r | |
247 | \r | |
248 | Status = InternalAllocPoolByIndex (PoolIndex, &FreePoolHdr);\r | |
249 | *Buffer = &FreePoolHdr->Header + 1;\r | |
250 | return Status;\r | |
251 | }\r | |
252 | \r | |
253 | /**\r | |
254 | Frees pool.\r | |
255 | \r | |
256 | @param Buffer The allocated pool entry to free.\r | |
257 | \r | |
258 | @retval EFI_INVALID_PARAMETER Buffer is not a valid value.\r | |
259 | @retval EFI_SUCCESS Pool successfully freed.\r | |
260 | \r | |
261 | **/\r | |
262 | EFI_STATUS\r | |
263 | EFIAPI\r | |
264 | SmmFreePool (\r | |
265 | IN VOID *Buffer\r | |
266 | )\r | |
267 | {\r | |
268 | FREE_POOL_HEADER *FreePoolHdr;\r | |
269 | \r | |
270 | if (Buffer == NULL) {\r | |
271 | return EFI_INVALID_PARAMETER;\r | |
272 | }\r | |
273 | \r | |
274 | FreePoolHdr = (FREE_POOL_HEADER*)((POOL_HEADER*)Buffer - 1);\r | |
275 | ASSERT (!FreePoolHdr->Header.Available);\r | |
276 | \r | |
277 | if (FreePoolHdr->Header.Size > MAX_POOL_SIZE) {\r | |
278 | ASSERT (((UINTN)FreePoolHdr & EFI_PAGE_MASK) == 0);\r | |
279 | ASSERT ((FreePoolHdr->Header.Size & EFI_PAGE_MASK) == 0);\r | |
280 | return SmmFreePages (\r | |
281 | (EFI_PHYSICAL_ADDRESS)(UINTN)FreePoolHdr,\r | |
282 | EFI_SIZE_TO_PAGES (FreePoolHdr->Header.Size)\r | |
283 | );\r | |
284 | }\r | |
285 | return InternalFreePoolByIndex (FreePoolHdr);\r | |
286 | }\r |