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1 | /** @file\r |
2 | SMM Memory pool management functions.\r | |
3 | \r | |
4 | Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>\r | |
86094561 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
6b46d772 SV |
7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include "StandaloneMmCore.h"\r | |
11 | \r | |
12 | LIST_ENTRY mMmPoolLists[MAX_POOL_INDEX];\r | |
13 | //\r | |
14 | // To cache the MMRAM base since when Loading modules At fixed address feature is enabled,\r | |
15 | // all module is assigned an offset relative the MMRAM base in build time.\r | |
16 | //\r | |
17 | GLOBAL_REMOVE_IF_UNREFERENCED EFI_PHYSICAL_ADDRESS gLoadModuleAtFixAddressMmramBase = 0;\r | |
18 | \r | |
19 | /**\r | |
20 | Called to initialize the memory service.\r | |
21 | \r | |
22 | @param MmramRangeCount Number of MMRAM Regions\r | |
23 | @param MmramRanges Pointer to MMRAM Descriptors\r | |
24 | \r | |
25 | **/\r | |
26 | VOID\r | |
27 | MmInitializeMemoryServices (\r | |
28 | IN UINTN MmramRangeCount,\r | |
29 | IN EFI_MMRAM_DESCRIPTOR *MmramRanges\r | |
30 | )\r | |
31 | {\r | |
32 | UINTN Index;\r | |
33 | \r | |
34 | //\r | |
35 | // Initialize Pool list\r | |
36 | //\r | |
37 | for (Index = sizeof (mMmPoolLists) / sizeof (*mMmPoolLists); Index > 0;) {\r | |
38 | InitializeListHead (&mMmPoolLists[--Index]);\r | |
39 | }\r | |
40 | \r | |
41 | \r | |
42 | //\r | |
43 | // Initialize free MMRAM regions\r | |
44 | //\r | |
45 | for (Index = 0; Index < MmramRangeCount; Index++) {\r | |
46 | //\r | |
47 | // BUGBUG: Add legacy MMRAM region is buggy.\r | |
48 | //\r | |
49 | if (MmramRanges[Index].CpuStart < BASE_1MB) {\r | |
50 | continue;\r | |
51 | }\r | |
52 | DEBUG ((DEBUG_INFO, "MmAddMemoryRegion %d : 0x%016lx - 0x%016lx\n",\r | |
53 | Index, MmramRanges[Index].CpuStart, MmramRanges[Index].PhysicalSize));\r | |
54 | MmAddMemoryRegion (\r | |
55 | MmramRanges[Index].CpuStart,\r | |
56 | MmramRanges[Index].PhysicalSize,\r | |
57 | EfiConventionalMemory,\r | |
58 | MmramRanges[Index].RegionState\r | |
59 | );\r | |
60 | }\r | |
61 | \r | |
62 | }\r | |
63 | \r | |
64 | /**\r | |
65 | Internal Function. Allocate a pool by specified PoolIndex.\r | |
66 | \r | |
67 | @param PoolIndex Index which indicate the Pool size.\r | |
68 | @param FreePoolHdr The returned Free pool.\r | |
69 | \r | |
70 | @retval EFI_OUT_OF_RESOURCES Allocation failed.\r | |
71 | @retval EFI_SUCCESS Pool successfully allocated.\r | |
72 | \r | |
73 | **/\r | |
74 | EFI_STATUS\r | |
75 | InternalAllocPoolByIndex (\r | |
76 | IN UINTN PoolIndex,\r | |
77 | OUT FREE_POOL_HEADER **FreePoolHdr\r | |
78 | )\r | |
79 | {\r | |
80 | EFI_STATUS Status;\r | |
81 | FREE_POOL_HEADER *Hdr;\r | |
82 | EFI_PHYSICAL_ADDRESS Address;\r | |
83 | \r | |
84 | ASSERT (PoolIndex <= MAX_POOL_INDEX);\r | |
85 | Status = EFI_SUCCESS;\r | |
86 | Hdr = NULL;\r | |
87 | if (PoolIndex == MAX_POOL_INDEX) {\r | |
88 | Status = MmInternalAllocatePages (\r | |
89 | AllocateAnyPages,\r | |
90 | EfiRuntimeServicesData,\r | |
91 | EFI_SIZE_TO_PAGES (MAX_POOL_SIZE << 1),\r | |
92 | &Address\r | |
93 | );\r | |
94 | if (EFI_ERROR (Status)) {\r | |
95 | return EFI_OUT_OF_RESOURCES;\r | |
96 | }\r | |
97 | Hdr = (FREE_POOL_HEADER *) (UINTN) Address;\r | |
98 | } else if (!IsListEmpty (&mMmPoolLists[PoolIndex])) {\r | |
99 | Hdr = BASE_CR (GetFirstNode (&mMmPoolLists[PoolIndex]), FREE_POOL_HEADER, Link);\r | |
100 | RemoveEntryList (&Hdr->Link);\r | |
101 | } else {\r | |
102 | Status = InternalAllocPoolByIndex (PoolIndex + 1, &Hdr);\r | |
103 | if (!EFI_ERROR (Status)) {\r | |
104 | Hdr->Header.Size >>= 1;\r | |
105 | Hdr->Header.Available = TRUE;\r | |
106 | InsertHeadList (&mMmPoolLists[PoolIndex], &Hdr->Link);\r | |
107 | Hdr = (FREE_POOL_HEADER*)((UINT8*)Hdr + Hdr->Header.Size);\r | |
108 | }\r | |
109 | }\r | |
110 | \r | |
111 | if (!EFI_ERROR (Status)) {\r | |
112 | Hdr->Header.Size = MIN_POOL_SIZE << PoolIndex;\r | |
113 | Hdr->Header.Available = FALSE;\r | |
114 | }\r | |
115 | \r | |
116 | *FreePoolHdr = Hdr;\r | |
117 | return Status;\r | |
118 | }\r | |
119 | \r | |
120 | /**\r | |
121 | Internal Function. Free a pool by specified PoolIndex.\r | |
122 | \r | |
123 | @param FreePoolHdr The pool to free.\r | |
124 | \r | |
125 | @retval EFI_SUCCESS Pool successfully freed.\r | |
126 | \r | |
127 | **/\r | |
128 | EFI_STATUS\r | |
129 | InternalFreePoolByIndex (\r | |
130 | IN FREE_POOL_HEADER *FreePoolHdr\r | |
131 | )\r | |
132 | {\r | |
133 | UINTN PoolIndex;\r | |
134 | \r | |
135 | ASSERT ((FreePoolHdr->Header.Size & (FreePoolHdr->Header.Size - 1)) == 0);\r | |
136 | ASSERT (((UINTN)FreePoolHdr & (FreePoolHdr->Header.Size - 1)) == 0);\r | |
137 | ASSERT (FreePoolHdr->Header.Size >= MIN_POOL_SIZE);\r | |
138 | \r | |
139 | PoolIndex = (UINTN) (HighBitSet32 ((UINT32)FreePoolHdr->Header.Size) - MIN_POOL_SHIFT);\r | |
140 | FreePoolHdr->Header.Available = TRUE;\r | |
141 | ASSERT (PoolIndex < MAX_POOL_INDEX);\r | |
142 | InsertHeadList (&mMmPoolLists[PoolIndex], &FreePoolHdr->Link);\r | |
143 | return EFI_SUCCESS;\r | |
144 | }\r | |
145 | \r | |
146 | /**\r | |
147 | Allocate pool of a particular type.\r | |
148 | \r | |
149 | @param PoolType Type of pool to allocate.\r | |
150 | @param Size The amount of pool to allocate.\r | |
151 | @param Buffer The address to return a pointer to the allocated\r | |
152 | pool.\r | |
153 | \r | |
154 | @retval EFI_INVALID_PARAMETER PoolType not valid.\r | |
155 | @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.\r | |
156 | @retval EFI_SUCCESS Pool successfully allocated.\r | |
157 | \r | |
158 | **/\r | |
159 | EFI_STATUS\r | |
160 | EFIAPI\r | |
161 | MmInternalAllocatePool (\r | |
162 | IN EFI_MEMORY_TYPE PoolType,\r | |
163 | IN UINTN Size,\r | |
164 | OUT VOID **Buffer\r | |
165 | )\r | |
166 | {\r | |
167 | POOL_HEADER *PoolHdr;\r | |
168 | FREE_POOL_HEADER *FreePoolHdr;\r | |
169 | EFI_STATUS Status;\r | |
170 | EFI_PHYSICAL_ADDRESS Address;\r | |
171 | UINTN PoolIndex;\r | |
172 | \r | |
173 | if (PoolType != EfiRuntimeServicesCode &&\r | |
174 | PoolType != EfiRuntimeServicesData) {\r | |
175 | return EFI_INVALID_PARAMETER;\r | |
176 | }\r | |
177 | \r | |
178 | Size += sizeof (*PoolHdr);\r | |
179 | if (Size > MAX_POOL_SIZE) {\r | |
180 | Size = EFI_SIZE_TO_PAGES (Size);\r | |
181 | Status = MmInternalAllocatePages (AllocateAnyPages, PoolType, Size, &Address);\r | |
182 | if (EFI_ERROR (Status)) {\r | |
183 | return Status;\r | |
184 | }\r | |
185 | \r | |
186 | PoolHdr = (POOL_HEADER*)(UINTN)Address;\r | |
187 | PoolHdr->Size = EFI_PAGES_TO_SIZE (Size);\r | |
188 | PoolHdr->Available = FALSE;\r | |
189 | *Buffer = PoolHdr + 1;\r | |
190 | return Status;\r | |
191 | }\r | |
192 | \r | |
193 | Size = (Size + MIN_POOL_SIZE - 1) >> MIN_POOL_SHIFT;\r | |
194 | PoolIndex = (UINTN) HighBitSet32 ((UINT32)Size);\r | |
195 | if ((Size & (Size - 1)) != 0) {\r | |
196 | PoolIndex++;\r | |
197 | }\r | |
198 | \r | |
199 | Status = InternalAllocPoolByIndex (PoolIndex, &FreePoolHdr);\r | |
200 | if (!EFI_ERROR (Status)) {\r | |
201 | *Buffer = &FreePoolHdr->Header + 1;\r | |
202 | }\r | |
203 | return Status;\r | |
204 | }\r | |
205 | \r | |
206 | /**\r | |
207 | Allocate pool of a particular type.\r | |
208 | \r | |
209 | @param PoolType Type of pool to allocate.\r | |
210 | @param Size The amount of pool to allocate.\r | |
211 | @param Buffer The address to return a pointer to the allocated\r | |
212 | pool.\r | |
213 | \r | |
214 | @retval EFI_INVALID_PARAMETER PoolType not valid.\r | |
215 | @retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.\r | |
216 | @retval EFI_SUCCESS Pool successfully allocated.\r | |
217 | \r | |
218 | **/\r | |
219 | EFI_STATUS\r | |
220 | EFIAPI\r | |
221 | MmAllocatePool (\r | |
222 | IN EFI_MEMORY_TYPE PoolType,\r | |
223 | IN UINTN Size,\r | |
224 | OUT VOID **Buffer\r | |
225 | )\r | |
226 | {\r | |
227 | EFI_STATUS Status;\r | |
228 | \r | |
229 | Status = MmInternalAllocatePool (PoolType, Size, Buffer);\r | |
230 | return Status;\r | |
231 | }\r | |
232 | \r | |
233 | /**\r | |
234 | Frees pool.\r | |
235 | \r | |
236 | @param Buffer The allocated pool entry to free.\r | |
237 | \r | |
238 | @retval EFI_INVALID_PARAMETER Buffer is not a valid value.\r | |
239 | @retval EFI_SUCCESS Pool successfully freed.\r | |
240 | \r | |
241 | **/\r | |
242 | EFI_STATUS\r | |
243 | EFIAPI\r | |
244 | MmInternalFreePool (\r | |
245 | IN VOID *Buffer\r | |
246 | )\r | |
247 | {\r | |
248 | FREE_POOL_HEADER *FreePoolHdr;\r | |
249 | \r | |
250 | if (Buffer == NULL) {\r | |
251 | return EFI_INVALID_PARAMETER;\r | |
252 | }\r | |
253 | \r | |
254 | FreePoolHdr = (FREE_POOL_HEADER*)((POOL_HEADER*)Buffer - 1);\r | |
255 | ASSERT (!FreePoolHdr->Header.Available);\r | |
256 | \r | |
257 | if (FreePoolHdr->Header.Size > MAX_POOL_SIZE) {\r | |
258 | ASSERT (((UINTN)FreePoolHdr & EFI_PAGE_MASK) == 0);\r | |
259 | ASSERT ((FreePoolHdr->Header.Size & EFI_PAGE_MASK) == 0);\r | |
260 | return MmInternalFreePages (\r | |
261 | (EFI_PHYSICAL_ADDRESS)(UINTN)FreePoolHdr,\r | |
262 | EFI_SIZE_TO_PAGES (FreePoolHdr->Header.Size)\r | |
263 | );\r | |
264 | }\r | |
265 | return InternalFreePoolByIndex (FreePoolHdr);\r | |
266 | }\r | |
267 | \r | |
268 | /**\r | |
269 | Frees pool.\r | |
270 | \r | |
271 | @param Buffer The allocated pool entry to free.\r | |
272 | \r | |
273 | @retval EFI_INVALID_PARAMETER Buffer is not a valid value.\r | |
274 | @retval EFI_SUCCESS Pool successfully freed.\r | |
275 | \r | |
276 | **/\r | |
277 | EFI_STATUS\r | |
278 | EFIAPI\r | |
279 | MmFreePool (\r | |
280 | IN VOID *Buffer\r | |
281 | )\r | |
282 | {\r | |
283 | EFI_STATUS Status;\r | |
284 | \r | |
285 | Status = MmInternalFreePool (Buffer);\r | |
286 | return Status;\r | |
287 | }\r |