]>
Commit | Line | Data |
---|---|---|
591fb378 OM |
1 | /** @file\r |
2 | *\r | |
3 | * Copyright (c) 2013, ARM Limited. All rights reserved.\r | |
4 | *\r | |
5 | * This program and the accompanying materials\r | |
6 | * are licensed and made available under the terms and conditions of the BSD License\r | |
7 | * which accompanies this 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 "CpuDxe.h"\r | |
16 | \r | |
17 | /**\r | |
18 | Searches memory descriptors covered by given memory range.\r | |
19 | \r | |
20 | This function searches into the Gcd Memory Space for descriptors\r | |
21 | (from StartIndex to EndIndex) that contains the memory range\r | |
22 | specified by BaseAddress and Length.\r | |
23 | \r | |
24 | @param MemorySpaceMap Gcd Memory Space Map as array.\r | |
25 | @param NumberOfDescriptors Number of descriptors in map.\r | |
26 | @param BaseAddress BaseAddress for the requested range.\r | |
27 | @param Length Length for the requested range.\r | |
28 | @param StartIndex Start index into the Gcd Memory Space Map.\r | |
29 | @param EndIndex End index into the Gcd Memory Space Map.\r | |
30 | \r | |
31 | @retval EFI_SUCCESS Search successfully.\r | |
32 | @retval EFI_NOT_FOUND The requested descriptors does not exist.\r | |
33 | \r | |
34 | **/\r | |
35 | EFI_STATUS\r | |
36 | SearchGcdMemorySpaces (\r | |
37 | IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r | |
38 | IN UINTN NumberOfDescriptors,\r | |
39 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
40 | IN UINT64 Length,\r | |
41 | OUT UINTN *StartIndex,\r | |
42 | OUT UINTN *EndIndex\r | |
43 | )\r | |
44 | {\r | |
45 | UINTN Index;\r | |
46 | \r | |
47 | *StartIndex = 0;\r | |
48 | *EndIndex = 0;\r | |
49 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r | |
50 | if ((BaseAddress >= MemorySpaceMap[Index].BaseAddress) &&\r | |
51 | (BaseAddress < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r | |
52 | *StartIndex = Index;\r | |
53 | }\r | |
54 | if (((BaseAddress + Length - 1) >= MemorySpaceMap[Index].BaseAddress) &&\r | |
55 | ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r | |
56 | *EndIndex = Index;\r | |
57 | return EFI_SUCCESS;\r | |
58 | }\r | |
59 | }\r | |
60 | return EFI_NOT_FOUND;\r | |
61 | }\r | |
62 | \r | |
63 | \r | |
64 | /**\r | |
65 | Sets the attributes for a specified range in Gcd Memory Space Map.\r | |
66 | \r | |
67 | This function sets the attributes for a specified range in\r | |
68 | Gcd Memory Space Map.\r | |
69 | \r | |
70 | @param MemorySpaceMap Gcd Memory Space Map as array\r | |
71 | @param NumberOfDescriptors Number of descriptors in map\r | |
72 | @param BaseAddress BaseAddress for the range\r | |
73 | @param Length Length for the range\r | |
74 | @param Attributes Attributes to set\r | |
75 | \r | |
76 | @retval EFI_SUCCESS Memory attributes set successfully\r | |
77 | @retval EFI_NOT_FOUND The specified range does not exist in Gcd Memory Space\r | |
78 | \r | |
79 | **/\r | |
80 | EFI_STATUS\r | |
81 | SetGcdMemorySpaceAttributes (\r | |
82 | IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r | |
83 | IN UINTN NumberOfDescriptors,\r | |
84 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
85 | IN UINT64 Length,\r | |
86 | IN UINT64 Attributes\r | |
87 | )\r | |
88 | {\r | |
89 | EFI_STATUS Status;\r | |
90 | UINTN Index;\r | |
91 | UINTN StartIndex;\r | |
92 | UINTN EndIndex;\r | |
93 | EFI_PHYSICAL_ADDRESS RegionStart;\r | |
94 | UINT64 RegionLength;\r | |
95 | \r | |
96 | DEBUG ((DEBUG_GCD, "SetGcdMemorySpaceAttributes[0x%lX; 0x%lX] = 0x%lX\n",\r | |
97 | BaseAddress, BaseAddress + Length, Attributes));\r | |
98 | \r | |
047c0cbb OM |
99 | // We do not support a smaller granularity than 4KB on ARM Architecture\r |
100 | if ((Length & EFI_PAGE_MASK) != 0) {\r | |
101 | DEBUG ((DEBUG_WARN,\r | |
102 | "Warning: We do not support smaller granularity than 4KB on ARM Architecture (passed length: 0x%lX).\n",\r | |
103 | Length));\r | |
104 | }\r | |
105 | \r | |
591fb378 OM |
106 | //\r |
107 | // Get all memory descriptors covered by the memory range\r | |
108 | //\r | |
109 | Status = SearchGcdMemorySpaces (\r | |
110 | MemorySpaceMap,\r | |
111 | NumberOfDescriptors,\r | |
112 | BaseAddress,\r | |
113 | Length,\r | |
114 | &StartIndex,\r | |
115 | &EndIndex\r | |
116 | );\r | |
117 | if (EFI_ERROR (Status)) {\r | |
118 | return Status;\r | |
119 | }\r | |
120 | \r | |
121 | //\r | |
122 | // Go through all related descriptors and set attributes accordingly\r | |
123 | //\r | |
124 | for (Index = StartIndex; Index <= EndIndex; Index++) {\r | |
125 | if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r | |
126 | continue;\r | |
127 | }\r | |
128 | //\r | |
129 | // Calculate the start and end address of the overlapping range\r | |
130 | //\r | |
131 | if (BaseAddress >= MemorySpaceMap[Index].BaseAddress) {\r | |
132 | RegionStart = BaseAddress;\r | |
133 | } else {\r | |
134 | RegionStart = MemorySpaceMap[Index].BaseAddress;\r | |
135 | }\r | |
136 | if ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length)) {\r | |
137 | RegionLength = BaseAddress + Length - RegionStart;\r | |
138 | } else {\r | |
139 | RegionLength = MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length - RegionStart;\r | |
140 | }\r | |
141 | //\r | |
142 | // Set memory attributes according to MTRR attribute and the original attribute of descriptor\r | |
143 | //\r | |
144 | gDS->SetMemorySpaceAttributes (\r | |
145 | RegionStart,\r | |
146 | RegionLength,\r | |
147 | (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_CACHETYPE_MASK) | (MemorySpaceMap[Index].Capabilities & Attributes)\r | |
148 | );\r | |
149 | }\r | |
150 | \r | |
151 | return EFI_SUCCESS;\r | |
152 | }\r | |
153 | \r | |
154 | /**\r | |
155 | This function modifies the attributes for the memory region specified by BaseAddress and\r | |
156 | Length from their current attributes to the attributes specified by Attributes.\r | |
157 | \r | |
158 | @param This The EFI_CPU_ARCH_PROTOCOL instance.\r | |
159 | @param BaseAddress The physical address that is the start address of a memory region.\r | |
160 | @param Length The size in bytes of the memory region.\r | |
161 | @param Attributes The bit mask of attributes to set for the memory region.\r | |
162 | \r | |
163 | @retval EFI_SUCCESS The attributes were set for the memory region.\r | |
164 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
165 | BaseAddress and Length cannot be modified.\r | |
166 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
167 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r | |
168 | the memory resource range.\r | |
169 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
170 | resource range specified by BaseAddress and Length.\r | |
171 | The bit mask of attributes is not support for the memory resource\r | |
172 | range specified by BaseAddress and Length.\r | |
173 | \r | |
174 | **/\r | |
175 | EFI_STATUS\r | |
176 | EFIAPI\r | |
177 | CpuSetMemoryAttributes (\r | |
178 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
179 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
180 | IN UINT64 Length,\r | |
2e969d2e | 181 | IN UINT64 EfiAttributes\r |
591fb378 OM |
182 | )\r |
183 | {\r | |
2e969d2e OM |
184 | EFI_STATUS Status;\r |
185 | UINTN ArmAttributes;\r | |
186 | UINTN RegionBaseAddress;\r | |
187 | UINTN RegionLength;\r | |
188 | UINTN RegionArmAttributes;\r | |
591fb378 OM |
189 | \r |
190 | if ((BaseAddress & (SIZE_4KB - 1)) != 0) {\r | |
191 | // Minimum granularity is SIZE_4KB (4KB on ARM)\r | |
2e969d2e | 192 | DEBUG ((EFI_D_PAGE, "CpuSetMemoryAttributes(%lx, %lx, %lx): Minimum ganularity is SIZE_4KB\n", BaseAddress, Length, EfiAttributes));\r |
591fb378 OM |
193 | return EFI_UNSUPPORTED;\r |
194 | }\r | |
195 | \r | |
2e969d2e OM |
196 | // Convert the 'Attribute' into ARM Attribute\r |
197 | ArmAttributes = EfiAttributeToArmAttribute (EfiAttributes);\r | |
198 | \r | |
199 | // Get the region starting from 'BaseAddress' and its 'Attribute'\r | |
200 | RegionBaseAddress = BaseAddress;\r | |
201 | Status = GetMemoryRegion (&RegionBaseAddress, &RegionLength, &RegionArmAttributes);\r | |
202 | \r | |
203 | // Data & Instruction Caches are flushed when we set new memory attributes.\r | |
204 | // So, we only set the attributes if the new region is different.\r | |
205 | if (EFI_ERROR (Status) || (RegionArmAttributes != ArmAttributes) ||\r | |
206 | ((BaseAddress + Length) > (RegionBaseAddress + RegionLength)))\r | |
207 | {\r | |
208 | return SetMemoryAttributes (BaseAddress, Length, EfiAttributes, 0);\r | |
209 | } else {\r | |
210 | return EFI_SUCCESS;\r | |
211 | }\r | |
591fb378 OM |
212 | }\r |
213 | \r | |
214 | EFI_STATUS\r | |
215 | EFIAPI\r | |
216 | CpuConvertPagesToUncachedVirtualAddress (\r | |
217 | IN VIRTUAL_UNCACHED_PAGES_PROTOCOL *This,\r | |
218 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
219 | IN UINTN Length,\r | |
220 | IN EFI_PHYSICAL_ADDRESS VirtualMask,\r | |
221 | OUT UINT64 *Attributes OPTIONAL\r | |
222 | )\r | |
223 | {\r | |
224 | EFI_STATUS Status;\r | |
225 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r | |
226 | \r | |
227 | if (Attributes != NULL) {\r | |
228 | Status = gDS->GetMemorySpaceDescriptor (Address, &GcdDescriptor);\r | |
229 | if (!EFI_ERROR (Status)) {\r | |
230 | *Attributes = GcdDescriptor.Attributes;\r | |
231 | }\r | |
232 | }\r | |
233 | \r | |
234 | //\r | |
235 | // Make this address range page fault if accessed. If it is a DMA buffer than this would\r | |
236 | // be the PCI address. Code should always use the CPU address, and we will or in VirtualMask\r | |
237 | // to that address.\r | |
238 | //\r | |
239 | Status = SetMemoryAttributes (Address, Length, EFI_MEMORY_WP, 0);\r | |
240 | if (!EFI_ERROR (Status)) {\r | |
241 | Status = SetMemoryAttributes (Address | VirtualMask, Length, EFI_MEMORY_UC, VirtualMask);\r | |
242 | }\r | |
243 | \r | |
244 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "CpuConvertPagesToUncachedVirtualAddress()\n Unmapped 0x%08lx Mapped 0x%08lx 0x%x bytes\n", Address, Address | VirtualMask, Length));\r | |
245 | \r | |
246 | return Status;\r | |
247 | }\r | |
248 | \r | |
249 | \r | |
250 | EFI_STATUS\r | |
251 | EFIAPI\r | |
252 | CpuReconvertPages (\r | |
253 | IN VIRTUAL_UNCACHED_PAGES_PROTOCOL *This,\r | |
254 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
255 | IN UINTN Length,\r | |
256 | IN EFI_PHYSICAL_ADDRESS VirtualMask,\r | |
257 | IN UINT64 Attributes\r | |
258 | )\r | |
259 | {\r | |
260 | EFI_STATUS Status;\r | |
261 | \r | |
262 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "CpuReconvertPages(%lx, %x, %lx, %lx)\n", Address, Length, VirtualMask, Attributes));\r | |
263 | \r | |
264 | //\r | |
265 | // Unmap the aliased Address\r | |
266 | //\r | |
267 | Status = SetMemoryAttributes (Address | VirtualMask, Length, EFI_MEMORY_WP, 0);\r | |
268 | if (!EFI_ERROR (Status)) {\r | |
269 | //\r | |
270 | // Restore atttributes\r | |
271 | //\r | |
272 | Status = SetMemoryAttributes (Address, Length, Attributes, 0);\r | |
273 | }\r | |
274 | \r | |
275 | return Status;\r | |
276 | }\r | |
277 | \r | |
278 | \r | |
279 | VIRTUAL_UNCACHED_PAGES_PROTOCOL gVirtualUncachedPages = {\r | |
280 | CpuConvertPagesToUncachedVirtualAddress,\r | |
281 | CpuReconvertPages\r | |
282 | };\r |