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e386b444 | 1 | /** @file\r |
f468abda | 2 | This library implement library class DxeServiceTableLib.\r |
3 | It produce EFI_DXE_SERVICE pointer in global variable gDS in library's constructure.\r | |
9095d37b | 4 | \r |
f468abda | 5 | A DXE driver can use gDS pointer to access services in EFI_DXE_SERVICE, if this\r |
9095d37b | 6 | DXE driver declare that use DxeServicesTableLib library class and link to this\r |
f468abda | 7 | library instance.\r |
8 | \r | |
9095d37b | 9 | Please attention this library instance can not be used util EFI_SYSTEM_TABLE was\r |
f468abda | 10 | initialized.\r |
9095d37b | 11 | \r |
c1d8b697 | 12 | This library contains construct function to retrieve EFI_DXE_SERVICE, this construct\r |
bb347ec2 | 13 | function will be invoked in DXE driver's autogen file.\r |
e386b444 | 14 | \r |
9095d37b | 15 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 16 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
e386b444 | 17 | \r |
e386b444 | 18 | **/\r |
19 | \r | |
c7d265a9 | 20 | #include <PiDxe.h>\r |
c7d265a9 | 21 | #include <Guid/DxeServices.h>\r |
c7d265a9 | 22 | #include <Library/DxeServicesTableLib.h>\r |
23 | #include <Library/DebugLib.h>\r | |
24 | #include <Library/UefiLib.h>\r | |
e386b444 | 25 | \r |
26 | //\r | |
27 | // Cache copy of the DXE Services Table\r | |
28 | //\r | |
2f88bd3a | 29 | EFI_DXE_SERVICES *gDS = NULL;\r |
e386b444 | 30 | \r |
31 | /**\r | |
32 | The constructor function caches the pointer of DXE Services Table.\r | |
33 | \r | |
34 | The constructor function caches the pointer of DXE Services Table.\r | |
35 | It will ASSERT() if that operation fails.\r | |
36 | It will ASSERT() if the pointer of DXE Services Table is NULL.\r | |
37 | It will always return EFI_SUCCESS.\r | |
38 | \r | |
39 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
40 | @param SystemTable A pointer to the EFI System Table.\r | |
41 | \r | |
42 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
43 | \r | |
44 | **/\r | |
45 | EFI_STATUS\r | |
46 | EFIAPI\r | |
47 | DxeServicesTableLibConstructor (\r | |
48 | IN EFI_HANDLE ImageHandle,\r | |
49 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
50 | )\r | |
51 | {\r | |
52 | EFI_STATUS Status;\r | |
53 | \r | |
54 | //\r | |
55 | // Cache copy of the DXE Services Table\r | |
56 | //\r | |
2f88bd3a | 57 | Status = EfiGetSystemConfigurationTable (&gEfiDxeServicesTableGuid, (VOID **)&gDS);\r |
e386b444 | 58 | ASSERT_EFI_ERROR (Status);\r |
59 | ASSERT (gDS != NULL);\r | |
60 | \r | |
61 | return Status;\r | |
62 | }\r |