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36ee91ca | 1 | /** @file\r |
2d0eeb36 | 2 | Help functions to access UDP service.\r |
d1102dba LG |
3 | \r |
4 | Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
9d510e61 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
36ee91ca | 6 | **/\r |
7 | \r | |
9fbc7449 | 8 | #include <Uefi.h>\r |
36ee91ca | 9 | #include <Library/DebugLib.h>\r |
10 | #include <Library/UefiBootServicesTableLib.h>\r | |
11 | #include <Protocol/Dpc.h>\r | |
12 | \r | |
13 | //\r | |
14 | // Pointer to the DPC Protocol\r | |
15 | //\r | |
16 | EFI_DPC_PROTOCOL *mDpc;\r | |
17 | \r | |
18 | /**\r | |
19 | This constructor function caches the EFI_DPC_PROTOCOL pointer.\r | |
20 | \r | |
21 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
22 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
23 | \r | |
24 | @retval EFI_SUCCESS The constructor always return EFI_SUCCESS.\r | |
25 | \r | |
26 | **/\r | |
27 | EFI_STATUS\r | |
28 | EFIAPI\r | |
29 | DpcLibConstructor (\r | |
30 | IN EFI_HANDLE ImageHandle,\r | |
31 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
32 | )\r | |
33 | {\r | |
34 | EFI_STATUS Status;\r | |
35 | \r | |
36 | //\r | |
37 | // Locate the EFI_DPC_PROTOCOL in the handle database\r | |
38 | //\r | |
39 | Status = gBS->LocateProtocol (&gEfiDpcProtocolGuid, NULL, (VOID **)&mDpc);\r | |
40 | ASSERT_EFI_ERROR (Status);\r | |
41 | \r | |
c7285227 | 42 | return Status;\r |
36ee91ca | 43 | }\r |
44 | \r | |
45 | /**\r | |
46 | Add a Deferred Procedure Call to the end of the DPC queue.\r | |
47 | \r | |
96858792 | 48 | @param[in] DpcTpl The EFI_TPL that the DPC should be invoked.\r |
49 | @param[in] DpcProcedure Pointer to the DPC's function.\r | |
50 | @param[in] DpcContext Pointer to the DPC's context. Passed to DpcProcedure\r | |
51 | when DpcProcedure is invoked.\r | |
36ee91ca | 52 | \r |
53 | @retval EFI_SUCCESS The DPC was queued.\r | |
54 | @retval EFI_INVALID_PARAMETER DpcTpl is not a valid EFI_TPL.\r | |
55 | @retval EFI_INVALID_PARAMETER DpcProcedure is NULL.\r | |
56 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to\r | |
57 | add the DPC to the queue.\r | |
58 | \r | |
59 | **/\r | |
60 | EFI_STATUS\r | |
7b414b4e | 61 | EFIAPI\r |
36ee91ca | 62 | QueueDpc (\r |
63 | IN EFI_TPL DpcTpl,\r | |
64 | IN EFI_DPC_PROCEDURE DpcProcedure,\r | |
96858792 | 65 | IN VOID *DpcContext OPTIONAL\r |
36ee91ca | 66 | )\r |
67 | {\r | |
68 | //\r | |
69 | // Call the EFI_DPC_PROTOCOL to queue the DPC\r | |
70 | //\r | |
71 | return mDpc->QueueDpc (mDpc, DpcTpl, DpcProcedure, DpcContext);\r | |
72 | }\r | |
73 | \r | |
74 | /**\r | |
75 | Dispatch the queue of DPCs. ALL DPCs that have been queued with a DpcTpl\r | |
76 | value greater than or equal to the current TPL are invoked in the order that\r | |
77 | they were queued. DPCs with higher DpcTpl values are invoked before DPCs with\r | |
78 | lower DpcTpl values.\r | |
79 | \r | |
80 | @retval EFI_SUCCESS One or more DPCs were invoked.\r | |
81 | @retval EFI_NOT_FOUND No DPCs were invoked.\r | |
82 | \r | |
83 | **/\r | |
84 | EFI_STATUS\r | |
7b414b4e | 85 | EFIAPI\r |
36ee91ca | 86 | DispatchDpc (\r |
87 | VOID\r | |
88 | )\r | |
89 | {\r | |
90 | //\r | |
91 | // Call the EFI_DPC_PROTOCOL to dispatch previously queued DPCs\r | |
92 | //\r | |
93 | return mDpc->DispatchDpc (mDpc);\r | |
94 | }\r |