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591fb378 OM |
1 | /** @file\r |
2 | *\r | |
3 | * Copyright (c) 2013, ARM Limited. All rights reserved.\r | |
b7a09b71 | 4 | * Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r |
591fb378 | 5 | *\r |
4059386c | 6 | * SPDX-License-Identifier: BSD-2-Clause-Patent\r |
591fb378 OM |
7 | *\r |
8 | **/\r | |
9 | \r | |
10 | #include "CpuDxe.h"\r | |
11 | \r | |
12 | /**\r | |
13 | Searches memory descriptors covered by given memory range.\r | |
14 | \r | |
15 | This function searches into the Gcd Memory Space for descriptors\r | |
16 | (from StartIndex to EndIndex) that contains the memory range\r | |
17 | specified by BaseAddress and Length.\r | |
18 | \r | |
19 | @param MemorySpaceMap Gcd Memory Space Map as array.\r | |
20 | @param NumberOfDescriptors Number of descriptors in map.\r | |
21 | @param BaseAddress BaseAddress for the requested range.\r | |
22 | @param Length Length for the requested range.\r | |
23 | @param StartIndex Start index into the Gcd Memory Space Map.\r | |
24 | @param EndIndex End index into the Gcd Memory Space Map.\r | |
25 | \r | |
26 | @retval EFI_SUCCESS Search successfully.\r | |
27 | @retval EFI_NOT_FOUND The requested descriptors does not exist.\r | |
28 | \r | |
29 | **/\r | |
30 | EFI_STATUS\r | |
31 | SearchGcdMemorySpaces (\r | |
32 | IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r | |
33 | IN UINTN NumberOfDescriptors,\r | |
34 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
35 | IN UINT64 Length,\r | |
36 | OUT UINTN *StartIndex,\r | |
37 | OUT UINTN *EndIndex\r | |
38 | )\r | |
39 | {\r | |
40 | UINTN Index;\r | |
41 | \r | |
42 | *StartIndex = 0;\r | |
43 | *EndIndex = 0;\r | |
44 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r | |
45 | if ((BaseAddress >= MemorySpaceMap[Index].BaseAddress) &&\r | |
46 | (BaseAddress < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r | |
47 | *StartIndex = Index;\r | |
48 | }\r | |
49 | if (((BaseAddress + Length - 1) >= MemorySpaceMap[Index].BaseAddress) &&\r | |
50 | ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r | |
51 | *EndIndex = Index;\r | |
52 | return EFI_SUCCESS;\r | |
53 | }\r | |
54 | }\r | |
55 | return EFI_NOT_FOUND;\r | |
56 | }\r | |
57 | \r | |
58 | \r | |
59 | /**\r | |
60 | Sets the attributes for a specified range in Gcd Memory Space Map.\r | |
61 | \r | |
62 | This function sets the attributes for a specified range in\r | |
63 | Gcd Memory Space Map.\r | |
64 | \r | |
65 | @param MemorySpaceMap Gcd Memory Space Map as array\r | |
66 | @param NumberOfDescriptors Number of descriptors in map\r | |
67 | @param BaseAddress BaseAddress for the range\r | |
68 | @param Length Length for the range\r | |
69 | @param Attributes Attributes to set\r | |
70 | \r | |
71 | @retval EFI_SUCCESS Memory attributes set successfully\r | |
72 | @retval EFI_NOT_FOUND The specified range does not exist in Gcd Memory Space\r | |
73 | \r | |
74 | **/\r | |
75 | EFI_STATUS\r | |
76 | SetGcdMemorySpaceAttributes (\r | |
77 | IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r | |
78 | IN UINTN NumberOfDescriptors,\r | |
79 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
80 | IN UINT64 Length,\r | |
81 | IN UINT64 Attributes\r | |
82 | )\r | |
83 | {\r | |
84 | EFI_STATUS Status;\r | |
85 | UINTN Index;\r | |
86 | UINTN StartIndex;\r | |
87 | UINTN EndIndex;\r | |
88 | EFI_PHYSICAL_ADDRESS RegionStart;\r | |
89 | UINT64 RegionLength;\r | |
90 | \r | |
91 | DEBUG ((DEBUG_GCD, "SetGcdMemorySpaceAttributes[0x%lX; 0x%lX] = 0x%lX\n",\r | |
92 | BaseAddress, BaseAddress + Length, Attributes));\r | |
93 | \r | |
047c0cbb OM |
94 | // We do not support a smaller granularity than 4KB on ARM Architecture\r |
95 | if ((Length & EFI_PAGE_MASK) != 0) {\r | |
96 | DEBUG ((DEBUG_WARN,\r | |
97 | "Warning: We do not support smaller granularity than 4KB on ARM Architecture (passed length: 0x%lX).\n",\r | |
98 | Length));\r | |
99 | }\r | |
100 | \r | |
591fb378 OM |
101 | //\r |
102 | // Get all memory descriptors covered by the memory range\r | |
103 | //\r | |
104 | Status = SearchGcdMemorySpaces (\r | |
105 | MemorySpaceMap,\r | |
106 | NumberOfDescriptors,\r | |
107 | BaseAddress,\r | |
108 | Length,\r | |
109 | &StartIndex,\r | |
110 | &EndIndex\r | |
111 | );\r | |
112 | if (EFI_ERROR (Status)) {\r | |
113 | return Status;\r | |
114 | }\r | |
115 | \r | |
116 | //\r | |
117 | // Go through all related descriptors and set attributes accordingly\r | |
118 | //\r | |
119 | for (Index = StartIndex; Index <= EndIndex; Index++) {\r | |
120 | if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r | |
121 | continue;\r | |
122 | }\r | |
123 | //\r | |
124 | // Calculate the start and end address of the overlapping range\r | |
125 | //\r | |
126 | if (BaseAddress >= MemorySpaceMap[Index].BaseAddress) {\r | |
127 | RegionStart = BaseAddress;\r | |
128 | } else {\r | |
129 | RegionStart = MemorySpaceMap[Index].BaseAddress;\r | |
130 | }\r | |
131 | if ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length)) {\r | |
132 | RegionLength = BaseAddress + Length - RegionStart;\r | |
133 | } else {\r | |
134 | RegionLength = MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length - RegionStart;\r | |
135 | }\r | |
136 | //\r | |
137 | // Set memory attributes according to MTRR attribute and the original attribute of descriptor\r | |
138 | //\r | |
139 | gDS->SetMemorySpaceAttributes (\r | |
140 | RegionStart,\r | |
141 | RegionLength,\r | |
142 | (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_CACHETYPE_MASK) | (MemorySpaceMap[Index].Capabilities & Attributes)\r | |
143 | );\r | |
144 | }\r | |
145 | \r | |
146 | return EFI_SUCCESS;\r | |
147 | }\r | |
148 | \r | |
149 | /**\r | |
150 | This function modifies the attributes for the memory region specified by BaseAddress and\r | |
151 | Length from their current attributes to the attributes specified by Attributes.\r | |
152 | \r | |
153 | @param This The EFI_CPU_ARCH_PROTOCOL instance.\r | |
154 | @param BaseAddress The physical address that is the start address of a memory region.\r | |
155 | @param Length The size in bytes of the memory region.\r | |
156 | @param Attributes The bit mask of attributes to set for the memory region.\r | |
157 | \r | |
158 | @retval EFI_SUCCESS The attributes were set for the memory region.\r | |
159 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
160 | BaseAddress and Length cannot be modified.\r | |
161 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
162 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r | |
163 | the memory resource range.\r | |
164 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
165 | resource range specified by BaseAddress and Length.\r | |
166 | The bit mask of attributes is not support for the memory resource\r | |
167 | range specified by BaseAddress and Length.\r | |
168 | \r | |
169 | **/\r | |
170 | EFI_STATUS\r | |
171 | EFIAPI\r | |
172 | CpuSetMemoryAttributes (\r | |
173 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
174 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
175 | IN UINT64 Length,\r | |
2e969d2e | 176 | IN UINT64 EfiAttributes\r |
591fb378 OM |
177 | )\r |
178 | {\r | |
2e969d2e OM |
179 | EFI_STATUS Status;\r |
180 | UINTN ArmAttributes;\r | |
181 | UINTN RegionBaseAddress;\r | |
182 | UINTN RegionLength;\r | |
183 | UINTN RegionArmAttributes;\r | |
591fb378 | 184 | \r |
3b44bb55 AB |
185 | if (mIsFlushingGCD) {\r |
186 | return EFI_SUCCESS;\r | |
187 | }\r | |
188 | \r | |
591fb378 OM |
189 | if ((BaseAddress & (SIZE_4KB - 1)) != 0) {\r |
190 | // Minimum granularity is SIZE_4KB (4KB on ARM)\r | |
2e969d2e | 191 | DEBUG ((EFI_D_PAGE, "CpuSetMemoryAttributes(%lx, %lx, %lx): Minimum ganularity is SIZE_4KB\n", BaseAddress, Length, EfiAttributes));\r |
591fb378 OM |
192 | return EFI_UNSUPPORTED;\r |
193 | }\r | |
194 | \r | |
2e969d2e OM |
195 | // Convert the 'Attribute' into ARM Attribute\r |
196 | ArmAttributes = EfiAttributeToArmAttribute (EfiAttributes);\r | |
197 | \r | |
198 | // Get the region starting from 'BaseAddress' and its 'Attribute'\r | |
199 | RegionBaseAddress = BaseAddress;\r | |
200 | Status = GetMemoryRegion (&RegionBaseAddress, &RegionLength, &RegionArmAttributes);\r | |
201 | \r | |
202 | // Data & Instruction Caches are flushed when we set new memory attributes.\r | |
203 | // So, we only set the attributes if the new region is different.\r | |
204 | if (EFI_ERROR (Status) || (RegionArmAttributes != ArmAttributes) ||\r | |
205 | ((BaseAddress + Length) > (RegionBaseAddress + RegionLength)))\r | |
206 | {\r | |
d9c0d991 | 207 | return ArmSetMemoryAttributes (BaseAddress, Length, EfiAttributes);\r |
2e969d2e OM |
208 | } else {\r |
209 | return EFI_SUCCESS;\r | |
210 | }\r | |
591fb378 | 211 | }\r |