projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 4e8ee0a0 | 1 | /** @file\r |
| e077a93d AB |
2 | ARM implementation of architecture specific routines related to\r |
| 3 | PersistAcrossReset capsules\r | |
| 4 | \r | |
| 5 | Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>\r | |
| a89fd3a3 | 6 | Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>\r |
| e077a93d | 7 | \r |
| 9d510e61 | 8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| e077a93d AB |
9 | \r |
| 10 | **/\r | |
| 11 | \r | |
| 12 | #include "CapsuleService.h"\r | |
| 13 | \r | |
| e077a93d AB |
14 | /**\r |
| 15 | Whether the platform supports capsules that persist across reset. Note that\r | |
| 16 | some platforms only support such capsules at boot time.\r | |
| 17 | \r | |
| 18 | @return TRUE if a PersistAcrossReset capsule may be passed to UpdateCapsule()\r | |
| 19 | at this time\r | |
| 20 | FALSE otherwise\r | |
| 21 | **/\r | |
| 22 | BOOLEAN\r | |
| 23 | IsPersistAcrossResetCapsuleSupported (\r | |
| 24 | VOID\r | |
| 25 | )\r | |
| 26 | {\r | |
| 27 | //\r | |
| 28 | // ARM requires the capsule payload to be cleaned to the point of coherency\r | |
| 29 | // (PoC), but only permits doing so using cache maintenance instructions that\r | |
| 30 | // operate on virtual addresses. Since at runtime, we don't know the virtual\r | |
| 31 | // addresses of the data structures that make up the scatter/gather list, we\r | |
| 32 | // cannot perform the maintenance, and all we can do is give up.\r | |
| 33 | //\r | |
| 34 | return FeaturePcdGet (PcdSupportUpdateCapsuleReset) && !EfiAtRuntime ();\r | |
| 35 | }\r | |
| 36 | \r |