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bf231ea6 A |
1 | /** @file\r |
2 | UEFI Runtime Library implementation for non IPF processor types.\r | |
ebcc8fb7 | 3 | \r |
bf231ea6 A |
4 | This library hides the global variable for the EFI Runtime Services so the\r |
5 | caller does not need to deal with the possiblitly of being called from an\r | |
6 | OS virtual address space. All pointer values are different for a virtual \r | |
7 | mapping than from the normal physical mapping at boot services time.\r | |
ebcc8fb7 | 8 | \r |
60c93673 | 9 | Copyright (c) 2006 - 2008, Intel Corporation.<BR>\r |
bf231ea6 A |
10 | All rights reserved. This program and the accompanying materials \r |
11 | are licensed and made available under the terms and conditions of the BSD License \r | |
12 | which accompanies this distribution. The full text of the license may be found at \r | |
13 | http://opensource.org/licenses/bsd-license.php \r | |
ebcc8fb7 | 14 | \r |
bf231ea6 A |
15 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
16 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
17 | \r | |
18 | **/\r | |
ebcc8fb7 | 19 | \r |
60c93673 | 20 | #include "RuntimeLibInternal.h"\r |
ebcc8fb7 | 21 | \r |
bf231ea6 A |
22 | \r |
23 | /**\r | |
24 | Resets the entire platform.\r | |
25 | \r | |
26 | @param ResetType The type of reset to perform.\r | |
27 | @param ResetStatus The status code for reset.\r | |
28 | @param DataSize The size in bytes of reset data.\r | |
29 | @param ResetData Pointer to data buffer that includes\r | |
30 | Null-Terminated Unicode string.\r | |
31 | \r | |
32 | **/\r | |
ebcc8fb7 | 33 | VOID\r |
34 | EFIAPI\r | |
35 | EfiResetSystem (\r | |
36 | IN EFI_RESET_TYPE ResetType,\r | |
37 | IN EFI_STATUS ResetStatus,\r | |
38 | IN UINTN DataSize,\r | |
39 | IN CHAR16 *ResetData\r | |
40 | )\r | |
bf231ea6 A |
41 | {\r |
42 | mRT->ResetSystem (ResetType, ResetStatus, DataSize, ResetData);\r | |
43 | }\r | |
ebcc8fb7 | 44 | \r |
ebcc8fb7 | 45 | \r |
bf231ea6 A |
46 | /**\r |
47 | Return current time and date information, and time-keeping\r | |
48 | capabilities of hardware platform.\r | |
ebcc8fb7 | 49 | \r |
bf231ea6 A |
50 | @param Time A pointer to storage to receive a snapshot of the current time.\r |
51 | @param Capabilities An optional pointer to a buffer to receive the real time clock device's\r | |
52 | capabilities.\r | |
ebcc8fb7 | 53 | \r |
bf231ea6 | 54 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 55 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 56 | \r |
bf231ea6 | 57 | **/\r |
ebcc8fb7 | 58 | EFI_STATUS\r |
59 | EFIAPI\r | |
60 | EfiGetTime (\r | |
61 | OUT EFI_TIME *Time,\r | |
62 | OUT EFI_TIME_CAPABILITIES *Capabilities\r | |
63 | )\r | |
bf231ea6 A |
64 | {\r |
65 | return mRT->GetTime (Time, Capabilities);\r | |
66 | }\r | |
ebcc8fb7 | 67 | \r |
ebcc8fb7 | 68 | \r |
bf231ea6 A |
69 | /**\r |
70 | Set current time and date information.\r | |
ebcc8fb7 | 71 | \r |
bf231ea6 | 72 | @param Time A pointer to cache of time setting.\r |
ebcc8fb7 | 73 | \r |
bf231ea6 A |
74 | @retval EFI_SUCCESS Success to execute the function.\r |
75 | @retval !EFI_SUCCESS Failed to execute the function.\r | |
ebcc8fb7 | 76 | \r |
bf231ea6 | 77 | **/\r |
ebcc8fb7 | 78 | EFI_STATUS\r |
79 | EFIAPI\r | |
80 | EfiSetTime (\r | |
81 | IN EFI_TIME *Time\r | |
82 | )\r | |
bf231ea6 A |
83 | {\r |
84 | return mRT->SetTime (Time);\r | |
85 | }\r | |
ebcc8fb7 | 86 | \r |
ebcc8fb7 | 87 | \r |
bf231ea6 A |
88 | /**\r |
89 | Return current wakeup alarm clock setting.\r | |
ebcc8fb7 | 90 | \r |
bf231ea6 A |
91 | @param Enabled Indicate if the alarm clock is enabled or disabled.\r |
92 | @param Pending Indicate if the alarm signal is pending and requires acknowledgement.\r | |
93 | @param Time Current alarm clock setting.\r | |
ebcc8fb7 | 94 | \r |
bf231ea6 | 95 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 96 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 97 | \r |
bf231ea6 | 98 | **/\r |
ebcc8fb7 | 99 | EFI_STATUS\r |
100 | EFIAPI\r | |
101 | EfiGetWakeupTime (\r | |
102 | OUT BOOLEAN *Enabled,\r | |
103 | OUT BOOLEAN *Pending,\r | |
104 | OUT EFI_TIME *Time\r | |
105 | )\r | |
bf231ea6 A |
106 | {\r |
107 | return mRT->GetWakeupTime (Enabled, Pending, Time);\r | |
108 | }\r | |
ebcc8fb7 | 109 | \r |
ebcc8fb7 | 110 | \r |
ebcc8fb7 | 111 | \r |
bf231ea6 A |
112 | /**\r |
113 | Set current wakeup alarm clock.\r | |
ebcc8fb7 | 114 | \r |
bf231ea6 A |
115 | @param Enable Enable or disable current alarm clock..\r |
116 | @param Time Point to alarm clock setting.\r | |
ebcc8fb7 | 117 | \r |
bf231ea6 | 118 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 119 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 120 | \r |
bf231ea6 | 121 | **/\r |
ebcc8fb7 | 122 | EFI_STATUS\r |
123 | EFIAPI\r | |
124 | EfiSetWakeupTime (\r | |
125 | IN BOOLEAN Enable,\r | |
126 | IN EFI_TIME *Time\r | |
127 | )\r | |
ebcc8fb7 | 128 | {\r |
129 | return mRT->SetWakeupTime (Enable, Time);\r | |
130 | }\r | |
131 | \r | |
132 | \r | |
bf231ea6 A |
133 | /**\r |
134 | Return value of variable.\r | |
135 | \r | |
136 | @param VariableName the name of the vendor's variable, it's a\r | |
137 | Null-Terminated Unicode String\r | |
138 | @param VendorGuid Unify identifier for vendor.\r | |
139 | @param Attributes Point to memory location to return the attributes of variable. If the point\r | |
140 | is NULL, the parameter would be ignored.\r | |
141 | @param DataSize As input, point to the maxinum size of return Data-Buffer.\r | |
142 | As output, point to the actual size of the returned Data-Buffer.\r | |
143 | @param Data Point to return Data-Buffer.\r | |
ebcc8fb7 | 144 | \r |
bf231ea6 | 145 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 146 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 147 | \r |
bf231ea6 | 148 | **/\r |
ebcc8fb7 | 149 | EFI_STATUS\r |
150 | EFIAPI\r | |
151 | EfiGetVariable (\r | |
152 | IN CHAR16 *VariableName,\r | |
153 | IN EFI_GUID * VendorGuid,\r | |
154 | OUT UINT32 *Attributes OPTIONAL,\r | |
155 | IN OUT UINTN *DataSize,\r | |
156 | OUT VOID *Data\r | |
157 | )\r | |
bf231ea6 A |
158 | {\r |
159 | return mRT->GetVariable (VariableName, VendorGuid, Attributes, DataSize, Data);\r | |
160 | }\r | |
ebcc8fb7 | 161 | \r |
ebcc8fb7 | 162 | \r |
bf231ea6 A |
163 | /**\r |
164 | Enumerates variable's name.\r | |
ebcc8fb7 | 165 | \r |
bf231ea6 A |
166 | @param VariableNameSize As input, point to maxinum size of variable name.\r |
167 | As output, point to actual size of varaible name.\r | |
168 | @param VariableName As input, supplies the last VariableName that was returned by\r | |
169 | GetNextVariableName().\r | |
170 | As output, returns the name of variable. The name\r | |
171 | string is Null-Terminated Unicode string.\r | |
172 | @param VendorGuid As input, supplies the last VendorGuid that was returned by\r | |
173 | GetNextVriableName().\r | |
174 | As output, returns the VendorGuid of the current variable.\r | |
ebcc8fb7 | 175 | \r |
bf231ea6 | 176 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 177 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 178 | \r |
bf231ea6 | 179 | **/\r |
ebcc8fb7 | 180 | EFI_STATUS\r |
181 | EFIAPI\r | |
182 | EfiGetNextVariableName (\r | |
183 | IN OUT UINTN *VariableNameSize,\r | |
184 | IN OUT CHAR16 *VariableName,\r | |
185 | IN OUT EFI_GUID *VendorGuid\r | |
186 | )\r | |
bf231ea6 A |
187 | {\r |
188 | return mRT->GetNextVariableName (VariableNameSize, VariableName, VendorGuid);\r | |
189 | }\r | |
ebcc8fb7 | 190 | \r |
ebcc8fb7 | 191 | \r |
bf231ea6 A |
192 | /**\r |
193 | Sets value of variable.\r | |
ebcc8fb7 | 194 | \r |
bf231ea6 A |
195 | @param VariableName the name of the vendor's variable, it's a\r |
196 | Null-Terminated Unicode String\r | |
197 | @param VendorGuid Unify identifier for vendor.\r | |
198 | @param Attributes Point to memory location to return the attributes of variable. If the point\r | |
199 | is NULL, the parameter would be ignored.\r | |
200 | @param DataSize The size in bytes of Data-Buffer.\r | |
201 | @param Data Point to the content of the variable.\r | |
ebcc8fb7 | 202 | \r |
bf231ea6 | 203 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 204 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 205 | \r |
bf231ea6 | 206 | **/\r |
ebcc8fb7 | 207 | EFI_STATUS\r |
208 | EFIAPI\r | |
209 | EfiSetVariable (\r | |
210 | IN CHAR16 *VariableName,\r | |
211 | IN EFI_GUID *VendorGuid,\r | |
212 | IN UINT32 Attributes,\r | |
213 | IN UINTN DataSize,\r | |
214 | IN VOID *Data\r | |
215 | )\r | |
bf231ea6 A |
216 | {\r |
217 | return mRT->SetVariable (VariableName, VendorGuid, Attributes, DataSize, Data);\r | |
218 | }\r | |
ebcc8fb7 | 219 | \r |
ebcc8fb7 | 220 | \r |
bf231ea6 A |
221 | /**\r |
222 | Returns the next high 32 bits of platform's monotonic counter.\r | |
ebcc8fb7 | 223 | \r |
bf231ea6 | 224 | @param HighCount Pointer to returned value.\r |
ebcc8fb7 | 225 | \r |
bf231ea6 | 226 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 227 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 228 | \r |
bf231ea6 | 229 | **/\r |
ebcc8fb7 | 230 | EFI_STATUS\r |
231 | EFIAPI\r | |
232 | EfiGetNextHighMonotonicCount (\r | |
233 | OUT UINT32 *HighCount\r | |
234 | )\r | |
bf231ea6 A |
235 | {\r |
236 | return mRT->GetNextHighMonotonicCount (HighCount);\r | |
237 | }\r | |
ebcc8fb7 | 238 | \r |
ebcc8fb7 | 239 | \r |
bf231ea6 A |
240 | /**\r |
241 | Determines the new virtual address that is to be used on subsequent memory accesses.\r | |
ebcc8fb7 | 242 | \r |
bf231ea6 A |
243 | @param DebugDisposition Supplies type information for the pointer being converted.\r |
244 | @param Address The pointer to a pointer that is to be fixed to be the\r | |
245 | value needed for the new virtual address mapping being\r | |
246 | applied.\r | |
ebcc8fb7 | 247 | \r |
bf231ea6 | 248 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 249 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 250 | \r |
bf231ea6 | 251 | **/\r |
ebcc8fb7 | 252 | EFI_STATUS\r |
253 | EFIAPI\r | |
254 | EfiConvertPointer (\r | |
255 | IN UINTN DebugDisposition,\r | |
256 | IN OUT VOID **Address\r | |
257 | )\r | |
bf231ea6 | 258 | {\r |
ad9e507a | 259 | return gRT->ConvertPointer (DebugDisposition, Address);\r |
bf231ea6 | 260 | }\r |
ebcc8fb7 | 261 | \r |
ebcc8fb7 | 262 | \r |
bf231ea6 A |
263 | /**\r |
264 | Conver the standard Lib double linked list to a virtual mapping.\r | |
ebcc8fb7 | 265 | \r |
bf231ea6 A |
266 | @param DebugDisposition Supplies type information for the pointer being converted.\r |
267 | @param ListHead Head of linked list to convert.\r | |
ebcc8fb7 | 268 | \r |
bf231ea6 | 269 | @retval EFI_SUCCESS Success to execute the function.\r |
60c93673 | 270 | @retval !EFI_SUCCESS Failed to execute the function.\r |
ebcc8fb7 | 271 | \r |
bf231ea6 | 272 | **/\r |
ebcc8fb7 | 273 | EFI_STATUS\r |
274 | EFIAPI\r | |
275 | EfiConvertList (\r | |
276 | IN UINTN DebugDisposition,\r | |
277 | IN OUT LIST_ENTRY *ListHead\r | |
278 | )\r | |
ebcc8fb7 | 279 | {\r |
280 | LIST_ENTRY *Link;\r | |
281 | LIST_ENTRY *NextLink;\r | |
60c93673 LG |
282 | \r |
283 | //\r | |
284 | // For NULL List, return EFI_SUCCESS\r | |
285 | //\r | |
286 | if (ListHead == NULL) {\r | |
287 | return EFI_SUCCESS;\r | |
288 | }\r | |
ebcc8fb7 | 289 | \r |
290 | //\r | |
291 | // Convert all the ForwardLink & BackLink pointers in the list\r | |
292 | //\r | |
293 | Link = ListHead;\r | |
294 | do {\r | |
295 | NextLink = Link->ForwardLink;\r | |
296 | \r | |
297 | EfiConvertPointer (\r | |
298 | Link->ForwardLink == ListHead ? DebugDisposition : 0,\r | |
299 | (VOID **) &Link->ForwardLink\r | |
300 | );\r | |
301 | \r | |
302 | EfiConvertPointer (\r | |
303 | Link->BackLink == ListHead ? DebugDisposition : 0,\r | |
304 | (VOID **) &Link->BackLink\r | |
305 | );\r | |
306 | \r | |
307 | Link = NextLink;\r | |
308 | } while (Link != ListHead);\r | |
309 | return EFI_SUCCESS;\r | |
310 | }\r | |
311 | \r | |
312 | \r | |
313 | /**\r | |
314 | Change the runtime addressing mode of EFI firmware from physical to virtual.\r | |
315 | \r | |
316 | @param MemoryMapSize The size in bytes of VirtualMap.\r | |
317 | @param DescriptorSize The size in bytes of an entry in the VirtualMap.\r | |
318 | @param DescriptorVersion The version of the structure entries in VirtualMap.\r | |
319 | @param VirtualMap An array of memory descriptors which contain new virtual\r | |
320 | address mapping information for all runtime ranges. Type\r | |
321 | EFI_MEMORY_DESCRIPTOR is defined in the\r | |
322 | GetMemoryMap() function description.\r | |
323 | \r | |
324 | @retval EFI_SUCCESS The virtual address map has been applied.\r | |
325 | @retval EFI_UNSUPPORTED EFI firmware is not at runtime, or the EFI firmware is already in\r | |
326 | virtual address mapped mode.\r | |
327 | @retval EFI_INVALID_PARAMETER DescriptorSize or DescriptorVersion is\r | |
328 | invalid.\r | |
329 | @retval EFI_NO_MAPPING A virtual address was not supplied for a range in the memory\r | |
330 | map that requires a mapping.\r | |
331 | @retval EFI_NOT_FOUND A virtual address was supplied for an address that is not found\r | |
332 | in the memory map.\r | |
333 | **/\r | |
334 | EFI_STATUS\r | |
335 | EFIAPI\r | |
336 | EfiSetVirtualAddressMap (\r | |
337 | IN UINTN MemoryMapSize,\r | |
338 | IN UINTN DescriptorSize,\r | |
339 | IN UINT32 DescriptorVersion,\r | |
340 | IN CONST EFI_MEMORY_DESCRIPTOR *VirtualMap\r | |
341 | )\r | |
342 | {\r | |
f80b0830 | 343 | return mRT->SetVirtualAddressMap (\r |
ebcc8fb7 | 344 | MemoryMapSize,\r |
345 | DescriptorSize,\r | |
346 | DescriptorVersion,\r | |
347 | (EFI_MEMORY_DESCRIPTOR *) VirtualMap\r | |
348 | );\r | |
349 | }\r | |
350 | \r | |
351 | \r | |
bf231ea6 A |
352 | /**\r |
353 | Passes capsules to the firmware with both virtual and physical mapping.\r | |
354 | Depending on the intended consumption, the firmware may\r | |
355 | process the capsule immediately. If the payload should persist across a\r | |
356 | system reset, the reset value returned from EFI_QueryCapsuleCapabilities must\r | |
357 | be passed into ResetSystem() and will cause the capsule to be processed by\r | |
358 | the firmware as part of the reset process.\r | |
359 | \r | |
360 | @param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules\r | |
361 | being passed into update capsule. Each capsules is assumed to\r | |
362 | stored in contiguous virtual memory. The capsules in the\r | |
363 | CapsuleHeaderArray must be the same capsules as the\r | |
364 | ScatterGatherList. The CapsuleHeaderArray must\r | |
365 | have the capsules in the same order as the ScatterGatherList.\r | |
366 | @param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in\r | |
367 | CaspuleHeaderArray.\r | |
368 | @param ScatterGatherList Physical pointer to a set of\r | |
369 | EFI_CAPSULE_BLOCK_DESCRIPTOR that describes the\r | |
370 | location in physical memory of a set of capsules. See Related\r | |
371 | Definitions for an explanation of how more than one capsule is\r | |
372 | passed via this interface. The capsules in the\r | |
373 | ScatterGatherList must be in the same order as the\r | |
374 | CapsuleHeaderArray. This parameter is only referenced if\r | |
375 | the capsules are defined to persist across system reset.\r | |
376 | \r | |
377 | @retval EFI_SUCCESS Valid capsule was passed. I Valid capsule was passed. If\r | |
378 | CAPSULE_FLAGS_PERSIT_ACROSS_RESET is not set, the\r | |
379 | capsule has been successfully processed by the firmware.\r | |
380 | @retval EFI_INVALID_PARAMETER CapsuleSize is NULL or ResetTye is NULL.\r | |
381 | @retval EFI_DEVICE_ERROR The capsule update was started, but failed due to a device error.\r | |
382 | \r | |
383 | **/\r | |
ebcc8fb7 | 384 | EFI_STATUS\r |
385 | EFIAPI\r | |
386 | EfiUpdateCapsule (\r | |
b67d6130 | 387 | IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,\r |
388 | IN UINTN CapsuleCount,\r | |
389 | IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL\r | |
ebcc8fb7 | 390 | )\r |
391 | {\r | |
392 | return mRT->UpdateCapsule (\r | |
393 | CapsuleHeaderArray,\r | |
394 | CapsuleCount,\r | |
395 | ScatterGatherList\r | |
396 | );\r | |
397 | }\r | |
398 | \r | |
bf231ea6 A |
399 | \r |
400 | /**\r | |
401 | The QueryCapsuleCapabilities() function allows a caller to test to see if a capsule or\r | |
402 | capsules can be updated via UpdateCapsule(). The Flags values in the capsule header and\r | |
403 | size of the entire capsule is checked.\r | |
404 | If the caller needs to query for generic capsule capability a fake EFI_CAPSULE_HEADER can be\r | |
405 | constructed where CapsuleImageSize is equal to HeaderSize that is equal to sizeof\r | |
406 | (EFI_CAPSULE_HEADER). To determine reset requirements,\r | |
407 | CAPSULE_FLAGS_PERSIST_ACROSS_RESET should be set in the Flags field of the\r | |
408 | EFI_CAPSULE_HEADER.\r | |
409 | The firmware must support any capsule that has the\r | |
410 | CAPSULE_FLAGS_PERSIST_ACROSS_RESET flag set in EFI_CAPSULE_HEADER. The\r | |
411 | firmware sets the policy for what capsules are supported that do not have the\r | |
412 | CAPSULE_FLAGS_PERSIST_ACROSS_RESET flag set.\r | |
413 | \r | |
414 | @param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules\r | |
415 | being passed into update capsule. The capsules are assumed to\r | |
416 | stored in contiguous virtual memory.\r | |
417 | @param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in\r | |
418 | CaspuleHeaderArray.\r | |
42eedea9 | 419 | @param MaximumCapsuleSize On output the maximum size that UpdateCapsule() can\r |
bf231ea6 A |
420 | support as an argument to UpdateCapsule() via\r |
421 | CapsuleHeaderArray and ScatterGatherList.\r | |
422 | Undefined on input.\r | |
423 | @param ResetType Returns the type of reset required for the capsule update.\r | |
424 | \r | |
425 | @retval EFI_SUCCESS Valid answer returned..\r | |
426 | @retval EFI_INVALID_PARAMETER MaximumCapsuleSize is NULL.\r | |
427 | @retval EFI_UNSUPPORTED The capsule type is not supported on this platform, and\r | |
428 | MaximumCapsuleSize and ResetType are undefined.\r | |
429 | \r | |
430 | **/\r | |
ebcc8fb7 | 431 | EFI_STATUS\r |
432 | EFIAPI\r | |
433 | EfiQueryCapsuleCapabilities (\r | |
b67d6130 | 434 | IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,\r |
435 | IN UINTN CapsuleCount,\r | |
436 | OUT UINT64 *MaximumCapsuleSize,\r | |
437 | OUT EFI_RESET_TYPE *ResetType\r | |
ebcc8fb7 | 438 | )\r |
439 | {\r | |
440 | return mRT->QueryCapsuleCapabilities (\r | |
441 | CapsuleHeaderArray,\r | |
442 | CapsuleCount,\r | |
443 | MaximumCapsuleSize,\r | |
444 | ResetType\r | |
445 | );\r | |
446 | }\r | |
447 | \r | |
448 | \r | |
bf231ea6 A |
449 | /**\r |
450 | The QueryVariableInfo() function allows a caller to obtain the information about the\r | |
451 | maximum size of the storage space available for the EFI variables, the remaining size of the storage\r | |
452 | space available for the EFI variables and the maximum size of each individual EFI variable,\r | |
453 | associated with the attributes specified.\r | |
454 | The returned MaximumVariableStorageSize, RemainingVariableStorageSize,\r | |
455 | MaximumVariableSize information may change immediately after the call based on other\r | |
456 | runtime activities including asynchronous error events. Also, these values associated with different\r | |
457 | attributes are not additive in nature.\r | |
458 | \r | |
459 | @param Attributes Attributes bitmask to specify the type of variables on\r | |
460 | which to return information. Refer to the\r | |
461 | GetVariable() function description.\r | |
462 | @param MaximumVariableStorageSize\r | |
463 | On output the maximum size of the storage space\r | |
464 | available for the EFI variables associated with the\r | |
465 | attributes specified.\r | |
466 | @param RemainingVariableStorageSize\r | |
467 | Returns the remaining size of the storage space\r | |
468 | available for the EFI variables associated with the\r | |
469 | attributes specified..\r | |
470 | @param MaximumVariableSize Returns the maximum size of the individual EFI\r | |
471 | variables associated with the attributes specified.\r | |
472 | \r | |
473 | @retval EFI_SUCCESS Valid answer returned.\r | |
474 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
475 | @retval EFI_UNSUPPORTED EFI_UNSUPPORTED The attribute is not supported on this platform, and the\r | |
476 | MaximumVariableStorageSize,\r | |
477 | RemainingVariableStorageSize, MaximumVariableSize\r | |
478 | are undefined.\r | |
479 | **/\r | |
ebcc8fb7 | 480 | EFI_STATUS\r |
481 | EFIAPI\r | |
482 | EfiQueryVariableInfo (\r | |
b67d6130 | 483 | IN UINT32 Attributes,\r |
484 | OUT UINT64 *MaximumVariableStorageSize,\r | |
485 | OUT UINT64 *RemainingVariableStorageSize,\r | |
486 | OUT UINT64 *MaximumVariableSize\r | |
ebcc8fb7 | 487 | )\r |
488 | {\r | |
489 | return mRT->QueryVariableInfo (\r | |
490 | Attributes,\r | |
491 | MaximumVariableStorageSize,\r | |
492 | RemainingVariableStorageSize,\r | |
493 | MaximumVariableSize\r | |
494 | );\r | |
495 | }\r |