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22cedf5b AB |
1 | /** @file\r |
2 | \r | |
3 | Parts of the SMM/MM implementation that are specific to traditional MM\r | |
4 | \r | |
5 | Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved. <BR>\r | |
6 | Copyright (c) 2018, Linaro, Ltd. All rights reserved. <BR>\r | |
9d510e61 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
22cedf5b AB |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #include <Library/SmmMemLib.h>\r | |
12 | #include <Library/UefiBootServicesTableLib.h>\r | |
13 | #include "FaultTolerantWrite.h"\r | |
14 | #include "FaultTolerantWriteSmmCommon.h"\r | |
15 | \r | |
16 | /**\r | |
17 | This function checks if the buffer is valid per processor architecture and\r | |
18 | does not overlap with SMRAM.\r | |
19 | \r | |
20 | @param Buffer The buffer start address to be checked.\r | |
21 | @param Length The buffer length to be checked.\r | |
22 | \r | |
23 | @retval TRUE This buffer is valid per processor architecture and does not\r | |
24 | overlap with SMRAM.\r | |
25 | @retval FALSE This buffer is not valid per processor architecture or overlaps\r | |
26 | with SMRAM.\r | |
27 | **/\r | |
28 | BOOLEAN\r | |
29 | FtwSmmIsBufferOutsideSmmValid (\r | |
30 | IN EFI_PHYSICAL_ADDRESS Buffer,\r | |
31 | IN UINT64 Length\r | |
32 | )\r | |
33 | {\r | |
34 | return SmmIsBufferOutsideSmmValid (Buffer, Length);\r | |
35 | }\r | |
36 | \r | |
37 | /**\r | |
38 | Internal implementation of CRC32. Depending on the execution context\r | |
39 | (traditional SMM or DXE vs standalone MM), this function is implemented\r | |
40 | via a call to the CalculateCrc32 () boot service, or via a library\r | |
41 | call.\r | |
42 | \r | |
43 | If Buffer is NULL, then ASSERT().\r | |
44 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r | |
45 | \r | |
46 | @param[in] Buffer A pointer to the buffer on which the 32-bit CRC is\r | |
47 | to be computed.\r | |
48 | @param[in] Length The number of bytes in the buffer Data.\r | |
49 | \r | |
50 | @retval Crc32 The 32-bit CRC was computed for the data buffer.\r | |
51 | \r | |
52 | **/\r | |
53 | UINT32\r | |
54 | FtwCalculateCrc32 (\r | |
1436aea4 MK |
55 | IN VOID *Buffer,\r |
56 | IN UINTN Length\r | |
22cedf5b AB |
57 | )\r |
58 | {\r | |
1436aea4 MK |
59 | EFI_STATUS Status;\r |
60 | UINT32 ReturnValue;\r | |
22cedf5b AB |
61 | \r |
62 | Status = gBS->CalculateCrc32 (Buffer, Length, &ReturnValue);\r | |
63 | ASSERT_EFI_ERROR (Status);\r | |
64 | \r | |
65 | return ReturnValue;\r | |
66 | }\r | |
67 | \r | |
68 | /**\r | |
44289eea | 69 | Notify the system that the SMM FTW driver is ready.\r |
22cedf5b AB |
70 | **/\r |
71 | VOID\r | |
72 | FtwNotifySmmReady (\r | |
73 | VOID\r | |
74 | )\r | |
75 | {\r | |
1436aea4 MK |
76 | EFI_HANDLE FtwHandle;\r |
77 | EFI_STATUS Status;\r | |
22cedf5b AB |
78 | \r |
79 | FtwHandle = NULL;\r | |
1436aea4 MK |
80 | Status = gBS->InstallProtocolInterface (\r |
81 | &FtwHandle,\r | |
82 | &gEfiSmmFaultTolerantWriteProtocolGuid,\r | |
83 | EFI_NATIVE_INTERFACE,\r | |
84 | NULL\r | |
85 | );\r | |
22cedf5b AB |
86 | ASSERT_EFI_ERROR (Status);\r |
87 | }\r | |
88 | \r | |
89 | /**\r | |
90 | This function is the entry point of the Fault Tolerant Write driver.\r | |
91 | \r | |
92 | @param[in] ImageHandle A handle for the image that is initializing this driver\r | |
93 | @param[in] SystemTable A pointer to the EFI system table\r | |
94 | \r | |
95 | @retval EFI_SUCCESS The initialization finished successfully.\r | |
96 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
97 | @retval EFI_INVALID_PARAMETER Workspace or Spare block does not exist\r | |
98 | \r | |
99 | **/\r | |
100 | EFI_STATUS\r | |
101 | EFIAPI\r | |
102 | SmmFaultTolerantWriteInitialize (\r | |
1436aea4 MK |
103 | IN EFI_HANDLE ImageHandle,\r |
104 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
22cedf5b AB |
105 | )\r |
106 | {\r | |
107 | return MmFaultTolerantWriteInitialize ();\r | |
108 | }\r |