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1 | /** @file\r | |
2 | Platform Hook Library instance for UART device.\r | |
3 | \r | |
4 | Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include <Base.h>\r | |
10 | #include <PiDxe.h>\r | |
11 | #include <UniversalPayload/SerialPortInfo.h>\r | |
12 | #include <Library/PlatformHookLib.h>\r | |
13 | #include <Library/PcdLib.h>\r | |
14 | #include <Library/HobLib.h>\r | |
15 | \r | |
16 | \r | |
17 | /** Library Constructor\r | |
18 | \r | |
19 | @retval RETURN_SUCCESS Success.\r | |
20 | **/\r | |
21 | EFI_STATUS\r | |
22 | EFIAPI\r | |
23 | PlatformHookSerialPortConstructor (\r | |
24 | VOID\r | |
25 | )\r | |
26 | {\r | |
27 | // Nothing to do here. This constructor is added to\r | |
28 | // enable the chain of constructor invocation for\r | |
29 | // dependent libraries.\r | |
30 | return RETURN_SUCCESS;\r | |
31 | }\r | |
32 | \r | |
33 | /**\r | |
34 | Performs platform specific initialization required for the CPU to access\r | |
35 | the hardware associated with a SerialPortLib instance. This function does\r | |
36 | not initialize the serial port hardware itself. Instead, it initializes\r | |
37 | hardware devices that are required for the CPU to access the serial port\r | |
38 | hardware. This function may be called more than once.\r | |
39 | \r | |
40 | @retval RETURN_SUCCESS The platform specific initialization succeeded.\r | |
41 | @retval RETURN_DEVICE_ERROR The platform specific initialization could not be completed.\r | |
42 | \r | |
43 | **/\r | |
44 | RETURN_STATUS\r | |
45 | EFIAPI\r | |
46 | PlatformHookSerialPortInitialize (\r | |
47 | VOID\r | |
48 | )\r | |
49 | {\r | |
50 | RETURN_STATUS Status;\r | |
51 | UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO *SerialPortInfo;\r | |
52 | UINT8 *GuidHob;\r | |
53 | UNIVERSAL_PAYLOAD_GENERIC_HEADER *GenericHeader;\r | |
54 | \r | |
55 | GuidHob = GetFirstGuidHob (&gUniversalPayloadSerialPortInfoGuid);\r | |
56 | if (GuidHob == NULL) {\r | |
57 | return EFI_NOT_FOUND;\r | |
58 | }\r | |
59 | \r | |
60 | GenericHeader = (UNIVERSAL_PAYLOAD_GENERIC_HEADER *) GET_GUID_HOB_DATA (GuidHob);\r | |
61 | if ((sizeof (UNIVERSAL_PAYLOAD_GENERIC_HEADER) > GET_GUID_HOB_DATA_SIZE (GuidHob)) || (GenericHeader->Length > GET_GUID_HOB_DATA_SIZE (GuidHob))) {\r | |
62 | return EFI_NOT_FOUND;\r | |
63 | }\r | |
64 | \r | |
65 | if (GenericHeader->Revision == UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO_REVISION) {\r | |
66 | SerialPortInfo = (UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO *) GET_GUID_HOB_DATA (GuidHob);\r | |
67 | if (GenericHeader->Length < UNIVERSAL_PAYLOAD_SIZEOF_THROUGH_FIELD (UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO, RegisterBase)) {\r | |
68 | //\r | |
69 | // Return if can't find the Serial Port Info Hob with enough length\r | |
70 | //\r | |
71 | return EFI_NOT_FOUND;\r | |
72 | }\r | |
73 | \r | |
74 | Status = PcdSetBoolS (PcdSerialUseMmio, SerialPortInfo->UseMmio);\r | |
75 | if (RETURN_ERROR (Status)) {\r | |
76 | return Status;\r | |
77 | }\r | |
78 | Status = PcdSet64S (PcdSerialRegisterBase, SerialPortInfo->RegisterBase);\r | |
79 | if (RETURN_ERROR (Status)) {\r | |
80 | return Status;\r | |
81 | }\r | |
82 | Status = PcdSet32S (PcdSerialRegisterStride, SerialPortInfo->RegisterStride);\r | |
83 | if (RETURN_ERROR (Status)) {\r | |
84 | return Status;\r | |
85 | }\r | |
86 | Status = PcdSet32S (PcdSerialBaudRate, SerialPortInfo->BaudRate);\r | |
87 | if (RETURN_ERROR (Status)) {\r | |
88 | return Status;\r | |
89 | }\r | |
90 | \r | |
91 | return RETURN_SUCCESS;\r | |
92 | }\r | |
93 | \r | |
94 | return EFI_NOT_FOUND;\r | |
95 | }\r |